Patent Application
20140289946
The present invention relates to an operating device for a flush water tank assembly, and, more particularly, to an operating device for a flush water tank assembly, which is designed to operate a water discharge valve disposed in a flush water tank to start supply of flush water to a toilet main unit.
Heretofore, there has been known a flush toilet configured such that, when a user operates an operating lever attached to a tank, a wire is interlockingly displaced to thereby open and close a water discharge valve of the tank.
As described in the Patent Document 1 (CN-U 2641156A), a conventionally known operating device comprises a link mechanism consisting of a plurality of links as illustrated in
However, in this type of operating device with an operating lever, the link mechanism pulls up the wire upwardly and linearly, so that it requires having a relatively long distance of motion range in an up-down direction. Thus, the operating device comprising the link mechanism is formed to have an entire length increased in an up-down direction. Therefore, this type of operating device has a problem that it is not suitable for a recently-preferred low-silhouette type of tank assembly. More specifically, in the low-silhouette type of tank having a relatively low height in an up-down direction, a distance between a maximum water level position within the tank and an attachment position of the operating device becomes relatively short. Thus, when the link mechanism-based operating device is formed to have an entire length increased in an up-down direction, a part of the operating device will be located under water. This causes a problem that the link mechanism and the wire may gather rust, scale, or the like to prevent a stable operation of the operating device.
The present invention has been made to solve the problems in the above conventional technique, and an object thereof is to provide an operating device capable of ensuring that a coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened through a rotation mechanism of a drive unit, and allowing the entire size of the drive unit to be decreased, so that stable operation of the operating device becomes possible without causing the drive unit to be located under a water level of flush water stored in a flush water tank.
In order to achieve the object, according to a first aspect of the present invention, there is provided an operating device for a flush water tank assembly, which is designed to operate a water discharge valve disposed in a flush water tank to start supply of flush water to a toilet main unit, comprising: an operating member disposed in a lateral region of an outer surface of the flush water tank, and configured to be rotationally moved according to a rotational operation performed by a user; a rotary shaft for transmitting the rotational movement of the operating member to an inside of the flush water tank; a drive unit disposed above a level of flush water within the flush water tank, and driven according to the rotational movement of the rotary shaft, the coupling member coupling the drive unit and the water discharge valve together, and capable of opening and closing the water discharge valve by means of its own displacement, wherein the drive unit comprises a rotation mechanism configured to be rotated at a radius of rotation greater than that of the rotary shaft, the rotation mechanism being operable to roll up the coupling member along its own rotational direction.
In the operating device of the present invention, the rotation mechanism of the drive unit is configured, with respect to the rotational movement of the operating member, to be rotated at a radius of rotation greater than that of the rotary shaft, and to roll up the coupling member along its own rotational direction. Thus, it is ensured that the coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened. In addition, due to the configuration of the rotation mechanism to roll up the coupling member along its own rotational direction, the entire length of the drive unit in an up-down direction can be decreased more than ever before, so that the entire size of the drive unit can be decreased. Therefore, the drive unit can be disposed in a low-silhouette type of flush water tank having a low height in an up-down direction. Further, the drive unit is not located under a water level of flush water stored in the flush water tank when it is disposed in the low-silhouette type of flush water tank. This prevents generation of rust, scale, or the like on the coupling member to enable a stable operation of the operating device comprising the coupling member.
Preferably, in the operating device of the present invention, the rotation mechanism of the drive unit comprises: a first rotary gear member attached to the rotary shaft in interlocking relation to the rotary shaft, and having a first tooth portion formed with external teeth; a rotary roll-up member having a roll-up member tooth portion which is a part of an outer periphery thereof formed with external teeth, and a fixing portion fixing the coupling member while allowing the coupling member to extend along the outer periphery thereof, the rotary roll-up member being configured to roll up the coupling member along its own rotational direction; and a second rotary gear member having a second tooth portion formed with external teeth and meshable with each of the first tooth portion and the roll-up member tooth portion.
In the operating device of the present invention, the rotation mechanism of the drive unit is configured to allow the first tooth portion rotated in interlocking relation to the rotary shaft to be rotated in mesh with the second tooth portion, and the second tooth portion is rotated in mesh with the roll-up member tooth portion, respectively. Thus, the rotary roll-up member is rotated in accordance with a rotational amount transmitted and amplified through the teeth, and configured to roll up the coupling member in its own rotational direction from the fixing portion along the outer periphery thereof. This makes it possible to ensure that a coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened even with a relatively small rotational movement of the operating member. Therefore, due to the configuration of the rotary roll-up member to roll up the coupling member in its own rotational direction along the outer periphery thereof, the entire length of the drive unit in an up-down direction can be decreased more than ever before, so that the entire size of the drive unit can be decreased.
Preferably, in the operating device of the present invention, the rotary roll-up member is configured such that a rotational center shaft has an axis identical to that of the rotary shaft to which the first rotary gear member is attached.
In the operating device of the present invention, since the rotary roll-up member is configured such that a rotational center shaft has an axis identical to that of the rotary shaft to which the first rotary gear member is attached, it can be rotated in an area that is bilaterally symmetric about the axis of the rotary shaft. This makes it possible to cause a rotational movement area in which the rotary roll-up member is permitted to make a rotational movement to be formed smaller, and to ensure that a coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened. Therefore, the entire size of the drive unit can be further decreased, and the drive unit can be disposed in a low-silhouette type of flush water tank having a low height in an up-down direction. Further, the drive unit is not located under a water level of flush water stored in the flush water tank when it is disposed in the low-silhouette type of flush water tank. This prevents generation of rust, scale, or the like on the coupling member to enable a stable operation of the operating device comprising the coupling member.
Preferably, in the operating device of the present invention, the rotary roll-up member comprises: a first outer peripheral portion at which the fixing portion is disposed and which is formed to have a relatively large curvature radius; and a second outer peripheral portion which forms the roll-up member tooth portion and which is formed to have a curvature radius smaller than that of the first outer peripheral portion.
In the operating device of the present invention, the rotary roll-up member is formed to allow the first outer peripheral portion formed to have a relatively large curvature radius and the second outer peripheral portion formed to have a curvature radius smaller than that of the first outer peripheral portion to be rotated about the same rotational center shaft. Therefore, the first outer peripheral portion configured to roll up the coupling member fixed to the fixing portion and the second outer peripheral portion having the roll-up member tooth portion configured to be meshable with the second tooth portion can be rotated about the same rotational center shaft. Thus, the first outer peripheral portion and the second outer peripheral portion can be formed on the same plane. This makes it possible to form the rotary roll-up member to have a small thickness as compared to the case where the first outer peripheral portion and the second outer peripheral portion are not formed on the same plane, so that the size of the rotary roll-up member itself can be decreased.
Preferably, in the operating device of the present invention, the drive unit comprises a covering member covering the rotation mechanism, the covering member having a restricting portion formed thereinside, wherein the second rotary gear member is formed in a partial shape smaller than a semicircle, and wherein the drive unit is configured to allow a lateral surface of the partial shape and the restricting portion to come into contact with each other to thereby restrict a range in which a user is permitted to perform the rotational operation of the operating member.
In the operating device of the present invention, the drive unit is configured to allow a lateral surface of the partial shape and the restricting portion to come into contact with each other to thereby restrict a range in which a user is permitted to perform the rotational operation of the operating member. This eliminates the need for newly providing any restriction means for restricting a range in which a user is permitted to perform the rotational operation of the operating member, so that the entire size of the drive unit can be further decreased. Further, the second rotary gear member is formed in a partial shape smaller than a semicircle, so that the size thereof can be decreased. Thus, the size of the covering member covering the rotation mechanism comprising the second rotary gear member can be decreased, so that the entire size of the drive unit can be further decreased.
Preferably, in the operating device of the present invention, the drive unit is configured to allow an arrangement of the second rotary gear member and the rotary roll-up member of the rotation mechanism to be changed, whereby the drive unit can be attached to the operating member, irrespective of whether the operating member is attached to a left lateral region or a right lateral region of the outer surface of the flush water tank.
In the operating device of the present invention, the drive unit is configured to allow an arrangement of the second rotary gear member and the rotary roll-up member of the rotation mechanism to be changed, whereby the drive unit can be attached to the operating member, irrespective of whether the operating member is attached to a left lateral region or a right lateral region of the outer surface of the flush water tank. Thus, it becomes possible to attach the operating device to either of a left lateral region or a right lateral region of the flush water tank.
Preferably, in the operating device of the present invention, the rotation mechanism of the drive unit comprises: a first rotary gear member attached to the rotary shaft in interlocking relation to the rotary shaft, and having a first tooth portion formed with external teeth; and a rotary roll-up member for rolling up the coupling member along its own rotational direction, the rotary roll-up member having a roll-up member tooth portion which is a part of an outer periphery thereof formed with external teeth and meshable with the first rotary gear member, and a fixing portion fixing the coupling member while allowing the coupling member to extend along the outer periphery thereof.
In the operating device of the present invention, the rotation mechanism of the drive unit is configured to allow the first tooth portion rotated in interlocking relation to the rotary shaft to be rotated in mesh with the roll-up member tooth portion. Thus, the rotary roll-up member is rotated in accordance with a rotational amount transmitted and amplified through the teeth, and rolls up the coupling member in its own rotational direction from the fixing portion along the outer periphery thereof. This makes it possible to ensure that a coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened even with a relatively small rotational movement of the operating member. Thus, due to the configuration of the rotary roll-up member to roll up the coupling member in its own rotational direction along the outer periphery thereof, the entire length of the drive unit in an up-down direction can be decreased more than ever before, so that the whole size of the drive unit can be decreased. Therefore, the drive unit can be disposed in a low-silhouette type of flush water tank having a low height in an up-down direction. Further, the drive unit is not located under a water level of flush water stored in the flush water tank when it is disposed in the low-silhouette type of flush water tank. This prevents generation of rust, scale, or the like on the coupling member to enable a stable operation of the operating device comprising the coupling member.
Preferably, in the operating device of the present invention, the rotary roll-up member comprises: a first outer peripheral portion at which the fixing portion is disposed and which is formed to have a relatively large curvature radius; and a second outer peripheral portion which forms the roll-up member tooth portion and which is formed to have a curvature radius smaller than that of the first outer peripheral portion.
In the operating device of the present invention, the rotary roll-up member comprises the fixing portion fixing the coupling member provided on the first outer peripheral portion having a relatively large curvature radius, whereby the coupling member is rolled up along the first outer peripheral portion. This makes it possible to ensure that a coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened. Further, the rotary roll-up member allows the first outer peripheral portion configured to roll up the coupling member fixed to the fixing portion and the second outer peripheral portion having the roll-up member tooth portion configured to be meshable with the first tooth portion to be rotated about the same rotational center shaft. Thus, the first outer peripheral portion and the second outer peripheral portion can be formed on the same plane. This makes it possible to form the rotary roll-up member to have a small thickness as compared to the case where the first outer peripheral portion and the second outer peripheral portion are not formed on the same plane, so that the size of the rotary roll-up member itself can be decreased.
According to a second aspect of the present invention, there is provided a flush water tank assembly comprising the above operating device.
The flush water tank assembly of the present invention can ensure a stable operation.
According to a third aspect of the present invention, there is provided a flush toilet comprising the above flush water tank assembly.
The flush toilet of the present invention can ensure a stable operation.
According to the operating device of the present invention, the rotation mechanism of the drive unit is configured to be rotated at a radius of rotation greater than that of the rotary shaft, and to roll up the coupling member along its own rotational direction. This makes it possible to ensure that the coupling member is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened, and allow the entire size of the drive unit to be decreased, so that stable operation of the operating device becomes possible without causing the drive unit to be located under a water level of flush water stored in a flush water tank.
With reference to the accompanying drawings, an operating device for a flush water tank assembly according to a first embodiment of the present invention, a flush water tank assembly equipped with the operating device, and a flush toilet equipped with the flush water tank assembly, will now be described.
First of all, based on
As illustrated in
The bowl portion 4 of the toilet main unit 2 has an upper edge formed with an inwardly overhanging rim 8, and a first spout port 10 for spouting flush water supplied from a water conduit (not illustrated) formed inside a rear of the toilet main unit 2. Specifically, the toilet main unit 2 is configured to allow flush water spouted from the first spout port 10 to spirally whirling downwardly along an inner surface thereof to thereby flush the bowl portion 4.
The bowl portion 4 has a lower region formed as a water pooling region 12 capable of pooling water at up to a water level (pooled-water level) indicated by the one-dot chain line W0. An inlet 6a of the drainage trap passage 6 is opened at a bottom of the water pooling region 12, and an outlet of the drainage trap passage 6 located rearward of the inlet 6a is connected to a drain pipe (not illustrated) arranged under a floor, via a drain socket (not illustrated).
The bowl portion 4 further has a second spout port 14 formed at a position above the pooled-water level W0 to spout flush water supplied from the water conduit (not illustrated) formed inside the rear of the toilet main unit 2. Specifically, the toilet main unit 2 is configured to allow flush water spouted from the second spout port 14 to cause water pooled in the water pooling region 12 to have a flow whirling in an up-down direction.
A flush water tank assembly 16 is provided on an upper surface of the rear of the toilet main unit 2 to store flush water to be supplied to the toilet main unit 2.
Although the first embodiment will be described based on an example in which the flush water tank assembly 16 is applied to the above siphon-type flush toilet, a scope of application of the present invention is not limited to the siphon-type flush toilet, but the present invention can also be applied to any other type of flush toilet, such as a so-called wash down-type flush toilet designed to wash away waste by means of a water flow action caused by water head within the bowl portion.
Secondly, based on
As illustrated in
The flush water tank 18 is a so-called low-silhouette type flush water tank, in which a height of a position of an upper end of the flush water tank 18 is set lower than that of a relatively longitudinally long, so-called high-silhouette type flush water tank. The low-silhouette type flush water tank 18 is formed in a laterally long flat shape to have a relatively reduced height, so that a height H1 in an up-down direction (a size of a space in which an aftermentioned operating device 30 can be installed) between a rotational axis C of an aftermentioned rotary shaft 34 of an aftermentioned operating device 30 and the maximum water level WL is provided to be relatively small.
As illustrated in
The water discharge valve device 24 has the same configuration as that of a conventional water discharge valve device, so that the concrete description thereof will be omitted. The water discharge valve device 24 is a so-called direct acting type water discharge valve device, in which the control wire 28 is connected to the valve element (not illustrated) of the water discharge valve device 24, wherein the water discharge valve device 24 is configured such that an amount of displacement in which the control wire 28 is permitted to be displaced corresponds to an amount of movement in an up-down direction of the valve element (not illustrated) of the water discharge valve device 24. When the operating handle 26 is turned, the control wire 28 interlockingly pulls up the valve element (not illustrated) of the water discharge valve device 24, and thereby supply of flush water is started to the flush toilet 1. Then, the water discharge port 20 is opened for a given period of time to allow a certain amount of flush water in the flush water tank 18 to be discharged to the water conduit (not illustrated) of the toilet main unit 2.
Thirdly, with reference to
As illustrated in
The operating handle 26 is a left operating handle attached to the left lateral region 18a of the flush water tank 18, and has a handling portion 26a configured to be operated downwardly by a user, e.g., with his/her finger, and extending to protrude forward to the user side. The operating handle 26 is adapted, when the user pushes the handling portion 26a downwardly, to generate a rotational movement about the rotary shaft 34.
The rotary shaft 34 is formed to extend through the flush water tank 18 from the outside to the inside thereof, and is horizontally disposed in a right-left direction of the flush water tank 18. The rotary shaft 34 is fitted with the operating handle 26 on the outside of the flush water tank 18, and is connected to the drive unit 38 on the inside of the flush water tank 18. The rotary shaft 34 is formed with a rotation stopper 34a, and is configured to, when the user performs the rotational operation of the operating handle 26, allow the rotation stopper 34a to come into contact with the rotary shaft guide 36 to thereby restrict a range of rotation of the operating handle 26 from its standby state up to 45 degrees.
The control wire 28 runs through a flexible tube 42 extending from the inside of the drive unit 38 to the inside of the water discharge valve device 24, and is extended to the inside of the drive unit 38 from one end of the tube 42 opened toward the inside of the drive unit 38. The control wire 28 is slidably disposed within the tube 42.
The drive unit 38 comprises a rotation mechanism 44 configured to be rotated about the rotary shaft 34 based on a rotational force of the rotary shaft 34. The drive unit 38 further comprises a covering member 46 having a surrounding wall 46a rising toward an inward of the flush water tank 18 so as to cover the outer side of the rotation mechanism 44. The drive unit 38 further comprises a covering cap 48 configured to be combined with the covering member 46 in such a manner as to apply a cap from the inward of the flush water tank 18 thereby to form an outer periphery of the drive unit 38 together with the covering member 46. The covering member 46 is formed in a compact shape to cover the outer periphery of the rotation mechanism 44.
The rotation mechanism 44 is configured to be rotated at a curvature radius (radius of rotation) R1 (see description below) larger than a curvature radius (radius of rotation) r1 of the rotary shaft 34.
The covering member 46 comprises a first restricting portion 46b formed on the surrounding wall 46a inside the covering member 46, a second restricting portion 46d protruding from a basal wall 46c inside the covering member 46, and a tube attachment portion 46f for allowing the tube 42 to be attached thereto.
The operating device 30 according to the first embodiment of the present invention is an operating device attached to the left lateral region 18a of the flush water tank 18 so as to facilitate the operation of the user with his/her left hand. Alternatively, the operating device 30 may be an operating device attached to the right lateral region 18b of the flush water tank 18 so as to facilitate the operation of the user with his/her right hand.
Next, with reference to
The rotation mechanism 44 of the drive unit 38 comprises a first rotary gear member 50 attached to the rotary shaft 34 to be interlockingly rotated with the rotary shaft 34, and having a first tooth portion 50a formed with external teeth. The rotation mechanism 44 further comprises a second rotary gear member 52 having an aftermentioned outer second tooth portion 52a formed with external teeth and meshable with the first tooth portion 50a. The rotation mechanism 44 further comprises a rotary roll-up member 54 meshable with the second rotary gear member 52 and configured to roll up the control wire 28 along its own rotational direction.
As described above, the first rotary gear member 50 has the first tooth portion 50a formed on an outer periphery thereof to form a circular gear. In order to be rotated with the rotary shaft 34, the first rotary gear member 50 is disposed such that the rotary shaft 34 is attached thereto in such a manner as to be fitted in a central region of the first rotary gear member 50 and the first rotary gear member 50 is rotated about the rotational axis C of the rotary shaft 34.
Further, the first rotary gear member 50 has a rotational support shaft 50b (rotational center shaft) formed to extend horizontally while having the same axis C as the rotational axis C of the rotary shaft 34. Since the first rotary gear member 50 is rotated with the rotary shaft 34, in this embodiment, when the operating handle 26 is rotationally operated 45 degrees, then the rotary shaft 34 is rotated 45 degrees, and the first rotary gear member 50 is rotated 45 degrees.
The second rotary gear member 52 is formed as a gear having a partial shape (a fan-like shape or a partial circular shape), such as a shape cut out from a circular shape, and has an outer second tooth portion 52a and an inner second tooth portion 52b, each formed on an outer periphery thereof. The second rotary gear member 52 is formed in a partial shape smaller than a semicircle. Further, the second rotary gear member 52 has a second rotary gear shaft 52c disposed horizontally in a right-left direction of the flush water tank 18.
The outer second tooth portion 52a is disposed on the second rotary gear shaft 52c at an outer side of the flush water tank 18 so as to be meshable with the first tooth portion 50a, and is formed as a partially-shaped gear having an outer periphery formed with external teeth. The inner second tooth portion 52b is disposed on the second rotary gear shaft 52c at an inner side of the flush water tank 18 so as to be meshable with an aftermentioned roll-up member tooth portion 54c, and is formed as a partially-shaped gear having an outer periphery formed with external teeth. The second rotary gear member 52 is configured such that when the outer second tooth portion 52a is rotationally moved, the inner second tooth portion 52b is also rotationally moved together in the same direction.
The second rotary gear shaft 52c of the second rotary gear member 52 is rotationally attached between the covering member 46 and the covering cap 48 at a position apart from the rotary shaft 34. The second rotary gear member 52 is adapted to be rotated based on a force transmitted through the mesh between the first tooth portion 50a and the outer second tooth portion 52a. Further, in this embodiment, the second rotary gear member 52 is configured such that when the first tooth portion 50a is rotationally moved 45 degrees, the outer second tooth portion 52a is rotated in accordance with an amplified rotational amount of 75 degrees, and accordingly, the inner second tooth portion 52b is rotated 75 degrees. As a result, he second rotary gear member 52 is rotated 75 degrees about the second rotary gear shaft 52c. Since the second rotary gear member 52 is formed in a compact partial shape smaller than a semicircle, the range of movement in which the second rotary gear member 52 is permitted to be rotated is relatively small. Thus, the covering member 46 covering the rotation mechanism 44 comprising the second rotary gear member 52 is also formed to have a relatively small size.
The second rotary gear member 52 comprises a first cutout lateral surface 52d on one side of the partial shape, and a second cutout lateral surface 52e on the other side of the partial shape. The first cutout lateral surface 52d is allowed to come into contact with the first restricting portion 46b to thereby be restricted to prevent the second rotary gear member 52 from being rotated further toward the first restricting portion 46b. The second cutout lateral surface 52e is allowed to come into contact with the second restricting portion 46d to thereby be restricted to prevent the second rotary gear member 52 from being rotated further toward the second restricting portion 46d. Usually, the range of rotation of the operating handle 26 from its standby state is limited up to 45 degrees by mean of the rotation stopper 34a. However, even in the case where the rotation stopper 34a is omitted, or the rotation stopper 34a is not functioning for any reason, the second cutout lateral surface 52e is allowed to come into contact with the second restricting portion 46d, so that the second rotary gear member 52 becomes limited in its function as a gear and restricted in its range of rotation. This makes it possible to prevent the control wire 28 from being pulled to an unexpected amount of displacement to cause a failure of the operating device.
The rotary roll-up member 54 comprises: a first outer peripheral portion 54b formed as a pulley portion 54a having a length of about one third of entire circumference of the rotary roll-up member 54, and configured to roll up the control wire 28 along its own rotational direction; and a second outer peripheral portion 54d formed in a fan-like shape as a roll-up member tooth portion 54c having a length of about two third of the entire circumference. In the second outer peripheral portion 54d, the roll-up member tooth portion 54c is formed in external teeth so as to be meshable with the inner second tooth portion 52b. The rotary roll-up member 54 further comprises a fixing portion 54e formed on an upper end of the circumference on the first outer peripheral portion 54b, and configured to fix the control wire 28 while allowing the control wire 28 to extend along the first outer peripheral portion 54b.
The rotary roll-up member 54 is configured such that the rotational support shaft 50b supporting the rotation of the rotary roll-up member 54 has an axis C identical to that of the rotary shaft 34 to which the first rotary gear member 50 is attached. The rotary roll-up member 54 is attached such that it is supported by the rotational support shaft 50b inserted as a central support shaft in a central region thereof and is freely rotatable independently from the rotation of the rotational support shaft 50b. The rotary roll-up member 54 is formed as a single-piece rotary member in which the first outer peripheral portion 54b formed as the pulley portion 54a and the second outer peripheral portion 54d formed as the roll-up member tooth portion 54c are coaxially arranged on the same plane. Since the rotary roll-up member 54 is formed as a single-piece rotary member, the drive unit 38 is formed to have a small entire thickness as compared to the case where the first outer peripheral portion 54b formed as the pulley portion 54a and the second outer peripheral portion 54d formed as the roll-up member tooth portion 54c are separately formed as two pieces of rotary members.
In the rotary roll-up member 54, the first outer peripheral portion 54b is formed to have a relatively large curvature radius (radius of rotation) R1, and the second outer peripheral portion 54d is formed to have a curvature radius (radius of rotation) R2 smaller than the curvature radius (radius of rotation) R1 of the first outer peripheral portion 54b. Further, the curvature radius R1 of the first outer peripheral portion 54b is larger than a curvature radius (radius of rotation) R3 of the first rotary gear member 50. Thus, a great majority of an outer edge of an area in which the rotation mechanism 44 is permitted to be rotated is defined by an area in which the first outer peripheral portion 54b is permitted to be rotated, so that the covering member 46 may substantially be formed to have an outer shape covering the area in which the first outer peripheral portion 54b is permitted to be rotated. Therefore, the covering member 46 can have a lower wall 46e of the covering member 46 and the tube attachment portion 46f, each formed at a position below the rotational axis C of the rotary shaft 34 in an up-down direction by a distance slightly longer than the curvature radius R1 of the first outer peripheral portion 54b. The drive unit 38 is formed to have an entire length in an up-down direction shorter than ever before. Specifically, the drive unit 38 is formed to have a height H2 in an up-down direction from the rotational axis C of the rotary shaft 34 to the tube attachment portion 46f smaller than the height H1 in an up-down direction between the rotational axis C and the maximum water level WL. Thus, even when the height H1 in an up-down direction between the rotational axis C and the maximum water level WL is relatively low, it is possible to dispose the drive unit 38 above the maximum water level WL to prevent it from being located under water.
In this embodiment, when the inner second tooth portion 52b is rotationally moved 75 degrees, the roll-up member tooth portion 54c is rotated in accordance with an amplified rotational amount of 125 degrees, so that the rotary roll-up member 54 is rotated 125 degrees about the rotational support shaft 50b.
The pulley portion 54a of the rotary roll-up member 54 is formed in a groove-like shape that is radially-inwardly concaved along the first outer peripheral portion 54b. This makes it possible to cause the control wire 28 to be rolled up along the pulley portion 54a while being fitted in the groove-like pulley portion 54a.
The fixing portion 54e is continuously provided from the groove on an upper end of the pulley portion 54a of the rotary roll-up member 54. In the front view illustrated in
The rotary roll-up member 54 is adapted, when the rotation mechanism 44 of the drive unit 38 is connected via the rotary shaft 34 to the operating handle 26 disposed on the left lateral region 18a of the flush water tank 18, to be disposed by causing a front side 54f of the rotary roll-up member 54 to be faced to the inner side of the flush water tank 18, and a back side 54g (not illustrated) to be faced to the outer side of the flush water tank 18.
The rotary roll-up member 54 is formed such that an angle α forming the fan-like shape has a measure that allows the control wire 28 to be reliably rolled up along the first outer peripheral portion 54b to an amount of displacement for causing a water discharge valve to be sufficiently moved upwardly by causing the rotary roll-up member 54 having the curvature radius R1 to be rotated to the angle α. As described above, the first tooth portion 50a, the outer second tooth portion 52a, the inner second tooth portion 52b and the roll-up member tooth portion 54c are configured to have a gear ratio enabling a rotation angle of the rotary roll-up member 54 to be increased to an angle that allows the control wire 28 to be reliably displaced to an amount sufficient to open and close the water discharge valve. The gear ratio of the first tooth portion 50a, the outer second tooth portion 52a, the inner second tooth portion 52b and the roll-up member tooth portion 54c can be changed.
Next, with reference to
In
As illustrated in
Then, as illustrated in
When the first rotary gear member 50 is rotated in the rotational direction D1, the first tooth portion 50a of the first rotary gear member 50 is rotated in the rotational direction D1, and the outer second tooth portion 52a in mesh with the first tooth portion 50a is in turn rotated in a rotational direction D2 reverse of the rotational direction D1. When the first tooth portion 50a is rotated 45 degrees in the rotational direction D1, the outer second tooth portion 52a is rotated 75 degrees in the rotational direction D2. The inner second tooth portion 52b of the second rotary gear member 52 is rotated 75 degrees in the rotational direction D2 along with the rotation of the outer second tooth portion 52a.
When the inner second tooth portion 52b is rotated in the rotational direction D2, the roll-up member tooth portion 54c in mesh with the inner second tooth portion 52b is rotated in a rotational direction D3. In this process, while the inner second tooth portion 52b is rotated 75 degrees, the roll-up member tooth portion 54c is rotated 125 degrees. The rotary roll-up member 54 is configured such that when the roll-up member tooth portion 54c of the second outer peripheral portion 54d thereof is rotated, the first outer peripheral portion 54b thereof is rotated in the same rotational direction D3.
When the first outer peripheral portion 54b of the rotary roll-up member 54 is rotated in the rotational direction D3, the fixing portion 54e formed on the first outer peripheral portion 54b is rotated in a direction to be moved upwardly on an circumference of the rotary roll-up member 54 with the radius of rotation R1 (rotational direction D3). With the upward movement of the fixing portion 54e along with the rotation of the first outer peripheral portion 54b, the fixing portion 54e and the control wire 28 are pulled up in an arc above the rotary shaft 34. This cause the control wire 28 connected to the fixing portion 54e to be pulled up from the tube 42 and rolled up along the groove-like pulley portion 54a formed on an outer surface of the first outer peripheral portion 54b. The rotary roll-up member 54 is adapted to, when it is rotated 125 degrees from the start of rotation, allow the control wire 28 to be pulled up over a distance corresponding to an pull-up amount of the valve element (not illustrated) of the water discharge valve device 24, along the pulley portion 54a of the first outer peripheral portion 54b.
When the valve element of the water discharge valve device 24 is pulled up by the control wire 28, the water discharge valve device 24 operates to open the water discharge port 20 of the flush water tank 18 to start water discharge from the flush water tank assembly 16 to the toilet main unit 2 of the flush toilet 1 in the flushing mode, so that the water level within the flush water tank 18 starts being lowered. In the toilet main unit 2, flushing operation of waste in the toilet main unit 2 is performed by the discharged flush water.
When the water level within the flush water tank 18 is lowered and the float member 37 is moved downwardly, the flush water supply device 22 opens the water supply valve (not illustrated) to start supply of flush water into the flush water tank 18. In this process, when the user disengages his/her hand from the operating handle 26, the operating handle 26 is rotated to be returned to the standby state position based on a force of the spring 32. With the returning rotation of the operating handle 26, the rotation mechanism 44 of the drive unit 38 is also rotationally moved so that each component thereof is returned to the original standby state position as illustrated in
Next, with reference to
Firstly, if the operating device 30 attached to the left side of the flush water tank 18 is removed from the left side of the flush water tank 18 and attached to the right side of the flush water tank 18 directly, the handling portion 26a of the operating handle 26 operated by the user will be attached in an orientation facing a back side of the flush water tank 18, so that it becomes unavailable to the user. Therefore, the right side operating device 56 attached to the right side of the flush water tank 18 is required to be disposed such that a handling portion 58a of a right side operating handle 58 extends, on the right side of the flush water tank 18, to the front side of the flush water tank 18, and to comprise a right side drive unit 60 configured to displace the control wire 28 according to the rotational movement of the rotary shaft 34 in conformity to the rotation of the right side operating handle 58.
In
The right side drive unit 60 comprises a right side rotation mechanism 62 configured to be rotated about the rotary shaft 34 based on a rotational force of the rotary shaft 34. The right side drive unit 60 further comprises a covering member 64 having a surrounding wall 64a rising toward an inward of the flush water tank 18 so as to cover the outer side of the right side rotation mechanism 62. The right side drive unit 60 further comprises a covering cap (not illustrated) configured to be combined with the covering member 64 in such a manner as to apply a cap from the inward of the flush water tank 18 thereby to form an outer periphery of the right side drive unit 60 together with the covering member 64.
The covering member 64 comprises a first restricting portion 64b formed on the surrounding wall 64a in a front surface inside the covering member 64, a second restricting portion 64d protruding from a basal wall 64c in a front region (on the front of the flush water tank 18) inside the covering member 64, and a tube attachment portion 64f for attaching the tube 42 to the rear (to the rear of the flush water tank 18) of a lower wall 64e of the covering member 64.
The right side rotation mechanism 62 of the right side drive unit 60 comprises a second rotary gear member 66 having an inner second tooth portion (not illustrated) formed in external teeth and meshable with the first tooth portion 50a. The right side rotation mechanism 62 further comprises a rotary roll-up member 68 meshable with the second rotary gear member 66 and configured to roll up the control wire 28 along its own rotational direction.
The second rotary gear member 66 comprises a rotational center shaft 66c for attaching the second rotary gear shaft 52c of the second rotary gear member 52 according to the first embodiment of the present invention in a frontward region of the right side rotation mechanism 62 of the right side drive unit 60. That is, the second rotary gear member 66 differs from the second rotary gear member 52 only in the position to be attached and the orientation thereof, and the same member is used. Thus, in this embodiment, the second rotary gear member 66 is provided using the second rotary gear member 52 by changing its position and orientation.
The second rotary gear member 66 is formed in a partial shape, and comprises a first cutout lateral surface 66d on one side of the partial shape, and a second cutout lateral surface 66e on the other side of the partial shape. The first cutout lateral surface 66d is allowed to come into contact with the second restricting portion 64d to thereby be restricted to prevent the second rotary gear member 66 from being rotated further toward the second restricting portion 64d. The second cutout lateral surface 66e is allowed to come into contact with the first restricting portion 64b to thereby be restricted to prevent the second rotary gear member 52 from being rotated further toward the first restricting portion 64b.
The rotary roll-up member 68 is provided by attaching the rotary roll-up member 54 according to the first embodiment of the present invention so as to be rotated about the same rotary shaft 34 (rotational support shaft 50b) while turning it over so that the fixing portion 54e is disposed at a laterally opposite position about the rotary shaft 34. That is, the rotary roll-up member 68 differs from the rotary roll-up member 54 only in that it is attached onto the rotational support shaft 50b so as to allow the front side 54f and the back side 54g of the rotary roll-up member 54 to be inverted, and is provided by the same member as the rotary roll-up member 54. Therefore, the rotary roll-up member 68 is adapted to be disposed by facing the front side (not illustrated) of the rotary roll-up member 68 to the outer side of the flush water tank 18 and the back side 68g (corresponding to the back side 54g of the rotary roll-up member 54) to the inner side of the flush water tank 18. Thus, the rotary roll-up member 68 can be provided using the rotary roll-up member 54.
By forming the right side rotation mechanism 62 of the right side drive unit 60 in this way, when the user performs the rotational operation for pulling the handling portion 58a of the right side operating handle 58 downwardly to be lowered 45 degrees in a rotational direction D4, the rotary shaft 34 coupled to the right side operating handle 58 is rotated 45 degrees in the rotational direction D4. This causes the first rotary gear member 50 attached to the rotary shaft 34 to be rotated 45 degrees in the rotational direction D4.
When the first rotary gear member 50 is rotated in the rotational direction D4, the outer second tooth portion 66a (not illustrated) in mesh with the first tooth portion 50a is rotated 75 degrees in a rotational direction D5, and the inner second tooth portion 66b is in turn rotated 75 degrees in the rotational direction D5. When the inner second tooth portion 66b is rotated in the rotational direction D5, a roll-up member tooth portion 68c in mesh with the inner second tooth portion 66b is rotated 125 degrees in a rotational direction D6. The rotary roll-up member 68 has a first outer peripheral portion 68b and a second outer peripheral portion 68d, wherein the second outer peripheral portion 68d is formed to have a curvature radius smaller than that of the first outer peripheral portion 68b.
Thus, the first outer peripheral portion 68b of the rotary roll-up member 68 is rotated 125 degrees in the rotational direction D6 to cause the control wire 28 connected to the fixing portion 68e to be pulled up from the tube 42 and rolled up along a groove-like pulley portion 68a formed on an outer surface of the first outer peripheral portion 68b. The rotary roll-up member 68 is adapted to, when it is rotated 125 degrees from the start of rotation, allow the control wire 28 to be pulled up over a distance corresponding to an pull-up amount of the valve element (not illustrated) of the water discharge valve device 24, along the pulley portion 68a of the first outer peripheral portion 68b.
In the operating device 30 according to the first embodiment of the present invention, with respect to the rotational movement of the operating handles 26, 58, the rotation mechanisms 44, 62 of the drive units 38, 60 are rotated at the radius of rotation R1 greater than the radius of rotation r1 of the rotary shaft 34. The rotation mechanisms 44, 62 are configured to roll up the control wire 28 along their own rotational directions D3, D6. This makes it possible to ensure that a control wire 28 is displaced to an amount sufficient to cause the water discharge valve to be moved upwardly and opened.
In addition, due to the configuration of the rotation mechanisms 44, 62 to roll up the control wire 28 along its their own rotational directions D3, D6, the entire length of the drive units 38, 60 in an up-down direction can be decreased more than ever before, so that the entire size of the drive units 38, 60 can be decreased. Therefore, the drive units 38, 60 can be disposed in a low-silhouette type of flush water tank 18 having a low height in an up-down direction. Thus, when the drive units 38, 60 are disposed in the low-silhouette type of flush water tank 18, they are not located under a water level of flush water at the maximum water level WL stored in the flush water tank 18. This prevents generation of rust, scale, or the like on the control wire 28 to enable a stable operation of the operating device 30 comprising the control wire 28.
Further, in the operating device 30 according to the first embodiment of the present invention, the rotation mechanisms 44, 62 of the drive units 38, 60 are configured to allow the first tooth portion 50a rotated in interlocking relation to the rotary shaft 34 to be rotated in mesh with the second tooth portion (inner second tooth portions 52b, 66a). The second tooth portions (inner second tooth portions 52b, 66a) are rotated in mesh with the roll-up member tooth portions 54c, 68c, respectively. Thus, the rotary roll-up members 54, 68 are rotated in accordance with a rotational amount transmitted and amplified through the teeth, and configured to roll up the control wire 28 in their own rotational directions D3, D6 from the fixing portions 54e, 68e along the outer periphery thereof. This makes it possible to ensure that the control wire 28 is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened even with a relatively small rotational movement of the operating handles 26, 58.
Therefore, due to the configuration of the rotary roll-up members 54, 68 to roll up the control wire 28 in their own rotational directions D3, D6 along the outer periphery thereof, the entire length of the drive units 38, 60 in an up-down direction can be decreased more than ever before, so that the entire size of the drive units 38, 60 can be decreased. Therefore, the drive units 38, 60 can be disposed in a low-silhouette type of flush water tank 18 having a low height in an up-down direction. Further, the drive units 38, 60 are not located under a water level of flush water at the maximum water level WL stored in the flush water tank 18 when they are disposed in the low-silhouette type of flush water tank 18. This prevents generation of rust, scale, or the like on the control wire 28 to enable a stable operation of the operating device 30 comprising the control wire 28.
Further, in the operating device 30 according to the first embodiment of the present invention, the rotary roll-up members 54, 68 are configured such that the rotational center shaft 50b has an axis C identical to that of the rotary shaft 34 to which the first rotary gear member 50 is attached. Thus, the rotary roll-up members 54, 68 can be rotated in an area that is bilaterally symmetric about the axis C of the rotational center shaft 50b. This makes it possible to cause the a rotational movement area in which the rotary roll-up members 54, 68 are permitted to make a rotational movement to be formed smaller, and to ensure that the control wire 28 is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened.
Therefore, the entire size of the drive units 38, 60 can be further decreased, and the drive units 38, 60 can be disposed in a low-silhouette type of flush water tank 18 having a low height in an up-down direction. Thus, when the drive units 38, 60 are disposed in the low-silhouette type of flush water tank 18, they are not located under a water level of flush water at the maximum water level WL stored in the flush water tank 18. This prevents generation of rust, scale, or the like on the control wire 28 to enable a stable operation of the operating device 30 comprising the control wire 28.
Further, in the operating device 30 according to the first embodiment of the present invention, the rotary roll-up members 54, 68 are formed to allow the first outer peripheral portions 54b, 68b formed to have a relatively large curvature radius and the second outer peripheral portions 54d, 68d formed to have a curvature radius smaller than that of the first outer peripheral portions 54b, 68b to be rotated about the same rotational center shaft 50b. Thus, The rotary roll-up members 54, 68 allow the first outer peripheral portions 54b, 68b configured to roll up the control wire 28 fixed to the fixing portions 54e, 68e and the second outer peripheral portions 54d, 68d having the roll-up member tooth portions 54c, 68c configured to be meshable with the inner second tooth portions 52b, 66b to be rotated about the same rotational center shaft 50b. Therefore, the first outer peripheral portions 54b, 68b and the second outer peripheral portions 54d, 68d can be formed on the same plane. This makes it possible to form the rotary roll-up members 54, 68 to have a small thickness as compared to the case where the first outer peripheral portions 54b, 68b and the second outer peripheral portions 54d, 68d are not formed on the same plane, so that the size of the rotary roll-up members 54, 68 themselves can be decreased.
Further, in the operating device 30 according to the first embodiment of the present invention, the partially-shaped first cutout lateral surface 52d and the first restricting portion 46b are allowed to come into contact with each other (or the partially-shaped first cutout lateral surface 66d and the second restricting portion 64d are allowed to come into contact with each other). Further, the second cutout lateral surface 52e and the second restricting portion 46d are allowed to come into contact with each other (or the second cutout lateral surface 66e and the first restricting portion 64b are allowed to come into contact with each other). This configuration restricts a range in which a user is permitted to perform the rotational operation of the operating handles 26, 58. This eliminates the need for newly providing any restriction means for restricting a range in which a user is permitted to perform the rotational manipulation of the operating handles 26, 58, so that the entire size of the drive units 38, 60 can be further decreased.
Further, the second rotary gear members 52, 66 are formed in a partial shape smaller than a semicircle, so that the size thereof can be decreased. Thus, the size of the covering members 46, 64 covering the rotation mechanisms 44, 62 comprising the second rotary gear members 52, 66 can be decreased, so that the entire size of the drive units 38, 60 can be further decreased.
Further, in the operating device 30 according to the first embodiment of the present invention, the drive units 38, 60 are configured to allow an arrangement of the second rotary gear members 52, 66 and the rotary roll-up members 54, 68 of the rotation mechanisms 44, 62 to be changed, whereby the drive units 38, 60 can be attached to the operating handles 26, 58, irrespective of whether the operating handles 26, 58 are attached to a left lateral region 18a or a right lateral region 18b of the outer surface of the flush water tank 18. Thus, it becomes possible to provide the operating device 30 attachable to either of a left lateral region or a right lateral region of the flush water tank 18.
According to a second aspect of the present invention, there is provided a flush water tank assembly 18 comprising the above operating device 30.
In the second aspect of the present invention, a flush water tank assembly 18 comprising the above operating device 30 can be provided.
According to a third aspect of the present invention, there is provided a flush toilet 1 comprising the above flush water tank assembly 18.
In the third aspect of the present invention, a flush toilet 1 comprising the above flush water tank assembly 18 can be provided.
Next, with reference to
In
In the operating device according to the second embodiment of the present invention, only the configuration of the drive unit is different from that of the operating device according to the first embodiment of the present invention, and the other elements have the same configuration as those in the first embodiment. Thus, only the drive unit having a different configuration from the first embodiment will be described below.
As illustrated in
Firstly, the operating device 130 according to the second embodiment of the present invention comprises a drive unit 138 disposed above the maximum water level WL of flush water within the flush water tank 18, and configured to transmit the rotational movement of the rotary shaft 34 to roll up the control wire 28. The rotary shaft 34 is connected to the drive unit 138 in a rearward region from the central region of the drive unit 138 inside the flush water tank 18.
The drive unit 138 comprises a rotation mechanism 144 configured to be rotated about the rotary shaft 34 based on a rotational force of the rotary shaft 34. The drive unit 138 further comprises a covering member 146 having a surrounding wall 146a rising toward an inward of the flush water tank 18 so as to cover the outer side of the rotation mechanism 144. The drive unit 138 further comprises a covering cap 148 configured to be combined with the covering member 146 in such a manner as to apply a cap from the inward of the flush water tank 18 thereby to form an outer periphery of the drive unit 138 together with the covering member 146.
The rotation mechanism 144 is configured to be rotated at a curvature radius (radius of rotation) R4 larger than a curvature radius (radius of rotation) r1 of the rotary shaft 34. The covering member 146 comprises a first restricting portion 146b formed to extend upwardly from a lower wall 146e within the covering member 146, and a tube attachment portion 146f for attaching the tube 42 to a frontward region of the lower wall 146e.
The operating device 130 according to the second embodiment of the present invention is an operating device attached to the left lateral region 18a of the flush water tank 18 so as to facilitate the operation of the user with his/her left hand. Alternatively, the operating device 130 may be an operating device attached to the right lateral region 18b of the flush water tank 18 so as to facilitate the manipulation of the user with his/her right hand.
Next, with reference to
The rotation mechanism 144 of the drive unit 138 comprises a first rotary gear member 150 attached to the rotary shaft 34 to be interlockingly rotated with the rotary shaft 34, and having a first tooth portion 150a formed with external teeth. The rotation mechanism 44 further comprises a rotary roll-up member 154 meshable with the first rotary gear member 150 and configured to roll up the control wire 28 along its own rotational direction.
As described above, the first rotary gear member 150 has the first tooth portion 150a formed on a part of an outer periphery thereof to form a partially-shaped (fan-like shaped) gear. In order to be rotated with the rotary shaft 34, the first rotary gear member 150 is disposed such that the rotary shaft 34 is attached thereto in such a manner as to be fitted in a central region of the first rotary gear member 150 and the first rotary gear member 150 is rotated about the rotational axis C of the rotary shaft 34. Since the first rotary gear member 150 is rotated with the rotary shaft 34, in this embodiment, when the operating handle 26 is rotationally operated 45 degrees, then the rotary shaft 34 is rotated 45 degrees, and the first rotary gear member 150 is rotated 45 degrees.
The rotary roll-up member 154 comprises: a first outer peripheral portion 154b formed as a pulley portion 154a having a length of about one-quarter of entire circumference of the rotary roll-up member 154, and configured to roll up the control wire 28 along its own rotational direction; and a second outer peripheral portion 154d formed in a fan-like shape as a roll-up member tooth portion 154c having a length of about three-quarter of the entire circumference. In the second outer peripheral portion 154d, the roll-up member tooth portion 154c is formed in external teeth so as to meshable with the first tooth portion 150a. The rotary roll-up member 154 further comprises a fixing portion 154e formed on an upper end of the circumference on the first outer peripheral portion 154b, and configured to fix the control wire 28 while allowing the control wire 28 to extend along the first outer peripheral portion 154b.
The rotary roll-up member 154 is configured to have a rotary shaft that is different from the rotary shaft 34 to which the first rotary gear member 150 is attached, as a rotational support shaft 154h supporting the rotation of the rotary roll-up member 154. The rotary shaft 34 is disposed apart from the central region of the covering member 146, while the rotational support shaft 154h is disposed in substantially the central region of the covering member 146. This arrangement allows the rotary roll-up member 154 to be rotated about the rotational support shaft 154h, so that the outer shape of the covering member 146 defining an outer edge of great majority of an area in which the rotation mechanism 144 is permitted to be rotated can be formed to have a relatively small size. This makes it possible to suppress enlargement of the length in right-left and up-down directions of the drive unit 138 to thereby further decrease the entire size of the drive unit 138. The rotational support shaft 154h is disposed on the same level in the horizontal direction as the rotary shaft 34.
In the rotary roll-up member 154, the first outer peripheral portion 154b is formed to have a relatively large curvature radius (radius of rotation) R4, and the second outer peripheral portion 154d is formed to have a curvature radius (radius of rotation) R5 smaller than the curvature radius (radius of rotation) R4 of the first outer peripheral portion 154b.
An outer edge of great majority of an area in which the first rotation mechanism 144 is permitted to be rotated is defined by an area in which the first outer peripheral portion 154b is permitted to be rotated. The covering member 146 can substantially be formed to have an outer shape covering a circular region with radius of rotation R4. Further, the covering member 146 can have the lower wall 146e of the covering member 146 formed at a position below the rotational support shaft 154h in an up-down direction by a distance slightly longer than the curvature radius R4 of the first outer peripheral portion 154b.
In this case, the drive unit 138 is formed to have an entire length in an up-down direction shorter than ever before. Specifically, the drive unit 138 is formed to have a height H3 in an up-down direction from the rotational axis C of the rotary shaft 34 to the lower wall 146e smaller than the height H1 in an up-down direction between the rotational axis C and the maximum water level WL.
In this embodiment, when the first rotary gear member 150 is rotationally moved 45 degrees, the roll-up member tooth portion 154c is rotated in accordance with an amplified rotational amount of 90 degrees, so that the rotary roll-up member 154 is rotated 90 degrees about the rotational support shaft 154h.
The pulley portion 154a of the rotary roll-up member 154 is formed in a groove-like shape that is radially-inwardly concaved along the first outer peripheral portion 154b. This makes it possible to cause the control wire 28 to be rolled up along the pulley portion 154a while being fitted in the groove-like pulley portion 154a.
The fixing portion 154e is continuously provided from the groove on an upper end of the pulley portion 154a of the rotary roll-up member 154. In the front view illustrated in
As described above, the first tooth portion 150a and the roll-up member tooth portion 154c are configured to have a gear ratio enabling a rotation angle of the rotary roll-up member 154 to be increased to an angle that allows the control wire 28 to be reliably displaced to an amount sufficient to open and close the water discharge valve. The gear ratio of the first tooth portion 150a and the roll-up member tooth portion 154c can be changed.
The pulley portion 154a of the rotary roll-up member 154 is formed in a partial shape, so that it has a first cutout lateral surface 154i on a lateral surface opposite the fixing portion 154e in the partial shape. The first cutout lateral surface 154i is allowed to come into contact with the first restricting portion 146b to thereby be restricted to prevent the rotary roll-up member 154 from being rotated further toward the first restricting portion 146b. Thus, by restricting the range of rotation of the rotary roll-up member 154, the range of magnitude in which the control wire 28 is permitted to be displaced can be restricted.
Next, with reference to
The operations of the flush water tank assembly and the flush toilet equipped with the flush water tank assembly other than the operation of the operating device according to the second embodiment of the present invention are identical to the operations of the flush water tank assembly equipped with the operating device according to the first embodiment of the present invention and the flush toilet equipped with the flush water tank assembly, so that the description thereof will be omitted.
As illustrated in
When the first rotary gear member 150 is rotated in the rotational direction D7, the first tooth portion 150a of the first rotary gear member 150 is rotated in the rotational direction D7, and the roll-up member tooth portion 154c in mesh with the first tooth portion 150a is in turn rotated in the rotational direction D8 reverse of the rotational direction D7. In this process, when the first tooth portion 150a is rotated 45 degrees in the rotational direction D7, the roll-up member tooth portion 154c is rotated 90 degrees in the rotational direction D8. The first outer peripheral portion 154b of the rotary roll-up member 154 is rotated 90 degrees in the rotational direction D8 along with the rotation of the roll-up member tooth portion 154c.
When the first outer peripheral portion 154b of the rotary roll-up member 154 is rotated in the rotational direction D8, the fixing portion 154e formed on the first outer peripheral portion 154b is rotated in a direction to be moved upwardly on an circumference with the radius of rotation R4 (rotational direction D8) about the rotational support shaft 154h of the rotary roll-up member 154. With the upward movement of the fixing portion 154e along with the rotation of the first outer peripheral portion 154b, the fixing portion 154e and the control wire 28 are pulled up in an arc above the rotary shaft 34. This cause the control wire 28 connected to the fixing portion 154e to be pulled out from the tube 42 and rolled up along the groove-like pulley portion 154a formed on an outer surface of the first outer peripheral portion 154b. The rotary roll-up member 154 is adapted, when it is rotated 90 degrees from the start of rotation, to allow the control wire 28 to be pulled up over a distance corresponding to an pull-up amount of the valve element (not illustrated) of the water discharge valve device 24, along the pulley portion 154a of the first outer peripheral portion 154b. When the user disengages his/her hand from the operating handle 26, the operating handle 26 is rotated to be returned to the standby state position based on a force of the spring (not illustrated). With the returning rotation of the operating handle 26, the rotation mechanism 144 of the drive unit 138 is also rotationally moved so that each component thereof is returned to the original standby state position as illustrated in
In the foregoing operating device 130 according to the second of the present invention, the rotation mechanism 144 of the drive unit 138 is configured to allow the first tooth portion 150a rotated in interlocking relation to the rotary shaft 34 to be rotated in mesh with the roll-up member tooth portion 154c. Thus, the rotary roll-up member 154 is rotated in accordance with a rotational amount transmitted and amplified through the teeth, and configured to roll up the control wire 28 in its own rotational direction from the fixing portion 154e along the outer periphery thereof. This makes it possible to ensure that the control wire 28 is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened even with a relatively small rotational movement of the operating handle 26.
Therefore, due to the configuration of the rotary roll-up member 154 to roll up the control wire 28 in its own rotational directions along the outer periphery thereof, the entire length of the drive unit 138 in an up-down direction can be decreased more than ever before, so that the entire size of the drive unit 138 can be decreased. Therefore, the drive unit 138 can be disposed in a low-silhouette type of flush water tank 18 having a low height in an up-down direction. Thus, when the drive unit 138 is disposed in the low-silhouette type of flush water tank 18, it is not located under a water level of flush water at the maximum water level WL stored in the flush water tank 18. This prevents generation of rust, scale, or the like on the control wire 28 to enable a stable operation of the operating device 130 comprising the control wire 28.
Further, in the operating device 130 according to the second of the present invention, the rotary roll-up member 154 comprises a fixing portion 154e for fixing the control wire 28, provided on the first outer peripheral portion 154b having a relatively large curvature radius, whereby the control wire 28 is rolled up along the first outer peripheral portion 154b. This makes it possible to ensure that the control wire 28 is displaced to an amount sufficient to cause a water discharge valve to be moved upwardly and opened.
Further, the rotary roll-up member 154 allows the first outer peripheral portion 154b configured to roll up the control wire 28 fixed to the fixing portion 154e and the second outer peripheral portion 154d having the roll-up member tooth portion 154c configured to be meshable with the first tooth portion 150a to be rotated about the same rotational center shaft. Thus, the first outer peripheral portion 154b and the second outer peripheral portion 154d can be formed on the same plane. This makes it possible to form the rotary roll-up member 154 to have a small thickness as compared to the case where the first outer peripheral portion 154b and the second outer peripheral portion 154d are not formed on the same plane, so that the size of the rotary roll-up member 154 itself can be decreased.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2013-068956 | Mar 2013 | JP | national |
