Patent Application
20120186496
This application claims priority under 35 U.S.C. §120 as a continuation of U.S. patent application Ser. No. 12/079,194, filed Mar. 25, 2008, which claims priority under 35 U.S.C. §120 as a continuation-in-part of U.S. patent application Ser. No. 11/895,851, filed Aug. 27, 2007, entitled “Operating Device.”
The present invention relates to an operating device, more specifically, an operating device in which the relative position of an operating portion and an operating object portion changes.
Generally, office workers work with a personal computer (PC) placed on their desks. For example, in the case of a desk-top type computer, at least a display and a keyboard, in some cases the computer main unit, are placed on a desk. In addition, in the case of a laptop-type computer, the entire laptop is placed on a desk.
However, office workers are not always using their PC when they are working. For example, when reading a document or taking notes while on the phone, the time when not using a computer is not necessarily short. Thus, if a PC is placed on a desk even when it's not in use, it takes up working space on the desk.
In order to solve such issues, an elevating apparatus which places the PC on a tray and moves the tray vertically, is proposed. In this apparatus, the tray is lowered when using the PC and the tray is raised to secure working space on the desk when the PC is not in use.
Among such elevating apparatuses, some may use an extension mechanism consisting of a cylinder and a piston. In such an extension mechanism, the length of the overall extension mechanism changes when the piston moves within the cylinder, and the overall length of the extension mechanism is determined according to the position of the piston. Also, inside the cylinder which is divided into two by the piston is in communication with front and back faces of the piston by a communicating channel, and fluid in the cylinder moves in the communicating channel along with the movement of the piston. A valve to be opened and closed is provided inside the communicating channel, and by closing this valve, the movement of the piston is fixed, thereby the overall length of the extension mechanism is fixed.
The operation of this valve is performed by an operating button protruding to the top end of the piston rod, and configured such that the valve is opened by pressing the button, thereby the piston can be moved, and the valve is closed when the button is restored, thereby the position of the piston is fixed.
Conventionally, an operating device to operate a button has a operating portion provided with a lever and the like, a communicating mechanism to communicate the operating amount of the operating portion to the button, an action portion to act the operating amount of the operating portion to the button. Because the operating porting is arranged on the lower side of the tray and the action portion is provided to the front end of the piston rod, relative position of the operating portion and the action portion changes when the tray of the elevating apparatus is moved vertically.
The conventional communicating mechanism is a mechanism consisting of an inner wire and an outer wire, and configured such that the operating amount is communicated by operating the inner wire stored inside the outer wire in an axial direction. Also, the inner wire and the outer wire have flexibility, and are configured to change form according to the change in relative position of the operating portion and the action portion.
However, these wires are in a linear form in the normal shape, and a restoring force is generated to restore to the original form when the wires are bent according to the position of the tray of the elevation apparatus. Because this restoring force acts on the elevation apparatus with wires attached, there is a problem of making the elevating operation of the tray heavy or light.
Also, friction is generated between the inner wire and the outer wire when the wires are bent, and the friction force changes according to the amount of bend of the wire, resulting in a problem of unstable operating load (force (load) necessary for an operator to operate the operating portion) of the operating portion.
The present invention is made with a view of the above facts and its objective is to propose a moving apparatus which allows an operator to effectively utilize work space on a desk, and has a stable operating load.
Such an objective can be achieved by the present invention described below.
An operating device consisting of a pressurizing operation means to apply pressure to a liquid pressure communicating medium according to the displacement of an operating member by an external operation, an action means to convert and operate the pressure applied by the pressurizing operation means into a switching operation of a position fixed state and a position released state of a positioning means, and a conducting channel to guide the pressure communicating medium from the pressurizing operation means to the action means, wherein the conducting channel is a conducting tube with flexibility and consists of a thermoplastic resin, and positions for installing the pressurizing operation means and the action means can be moved relatively.
An operating device for attaching to a moving apparatus consisting of a platform, a placing portion having a placing face to place a placing object, an elevation oscillating member comprising a rear end portion oscillatably connected to the platform and a front end portion oscillatably connected to the placing portion, an extension mechanism located between the elevation oscillating member and the platform, and a switching means to switch the extension position of the extension mechanism to a lock state and a release state that allows extension, wherein the elevation oscillating member, the platform, and the extension means comprises a triangular link structure, and the operating device consisting of a pressurizing operation means to apply pressure to a liquid pressure communicating medium according to the displacement of an operating member by an external operation, an action means to output the pressure applied from the pressurizing operation means as an operating pressure for the switching operation of the switching means, and a conducting tube with flexibility that consists of a thermoplastic resin to guide the liquid pressure communicating medium from the pressurizing operation means to the action means.
The pressurizing operation means is a operating side piston that advances and retreats according to the displacement of the operating member, and an operating side cylinder filled with a liquid pressure communicating medium.
The action means has an acting side piston which the pressure from the pressurizing operation means is applied, an acting side cylinder which stores the acting side piston and is filled with a liquid pressure communicating medium, and an acting member which advances and retreats along with the acting side piston as a unit.
The pressure communicating medium is oil, the positioning means is a opening and closing means to open and close a communicating channel connecting the space in the cylinder divided into two by the piston in an extension mechanism having a cylinder filled with fluid and a piston reciprocatably stored in the cylinder, and the opening and closing means is opened and closed by the action means.
The opening and closing means executes an opening and closing motion when the distance of the action side piston of the action means exceeds a predetermined value.
In the operating device, the conducting tube is generally in a helical form, but may also take other forms.
The communication of the operating pressure from the pressurizing operation means to the action means is performed though the pressure communicating medium which is a fluid, the operating pressure is communicated to the action portion and the pressure required for operation is stabilized even when the conduction channel is deformed due to a change in the relative position of the pressurizing operation means and the action means. Because the conducting tube consists of a thermoplastic resin, the conducting tube itself softens in a case when the pressure communicating medium expands due to an increase in temperature, thereby absorbing the volume relative to the expansion of the pressure communicating medium by expanding the conducting tube itself. This enables the suppression of an improper operation caused by an increase in pressure to the action means due to the heat expansion of the pressure communicating medium.
The placing portion may be moved vertically by sliding the elevation oscillating member as a fixing release state of the extension means. By moving the placing portion, the angle of the placing portion and the elevation oscillating member changes, thereby the relative position of the pressurizing operation means on the placing portion side and the action means on the elevation oscillating member side changes. Even when such a change in the relative position occurs, the pressure communicating medium is guided though the flexible conducting tube, thereby the bend of the conducting tube does not obstruct the elevation operation of the placing portion, and also the operating load is maintained in a stable fashion. Because the conducting tube consists of a thermoplastic resin, the conducting tube itself softens in a case when the pressure communicating medium expands due to an increase in temperature, and thereby is capable of absorbing the volume relative to the expansion of the pressure communicating medium by expansion of the conducting tube itself. This enables the suppression of an improper operation caused by an increase in pressure to the action means due to the heat expansion of the pressure communicating medium.
An amount of the displacement of the operating member is communicated to the action means through the pressure communicating medium by moving the piston with the operating member, thereby the amount of the displacement of the operating side can be communicated accurately to the action portion side. The acting side piston converts the amount of displacement of the operating side communicated though the pressure communicating medium into the operation displacement, thereby the amount of the displacement of the operating side can be accurately acted as the displacement of the acting side. The length of the extension mechanism can be adjusted to an arbitrary length by configuring the extension mechanism with the cylinder and the piston. Also, by using the opening and closing means to open and close the distribution channel to insert the piston as a lock mechanism, the length can be fixed at an arbitrary position. Further, by using oil as a pressure communicating medium, the operation displacement of the pressure operating means side can be accurately communicated sequentially to the action means side, thereby the open-close operation of the opening and closing means may be performed with high accuracy.
The opening and closing motion may be operated accurately because the opening and closing motion is executed when the distance of the action side piston of the action means exceeds a predetermined value. Further, because the conducting tube consists of a thermoplastic resin, the conducting tube softens and is capable of expanding along with the expansion of the pressure communicating medium in a case when the pressure communicating medium expands due to an increase in temperature, thereby enabling the suppression of an improper operation caused by the movement of the action side piston due to the increase in volume.
By forming the conducting tube into a helical form, or other generally curved shape, the expandable distance increases, thereby the moving distance of the relative displacement of the pressure operating means and the action means may be configured much longer.
The present invention will hereinafter be more specifically described in reference to drawings. As shown in
The fixation device 14 consisting of a contact portion 14C with an angled “U”-shaped cross section, and its upper face contacting with the lower face of a base 20 of the moving portion 12, and the upper inner face contacting with the surface of the desk. This contact portion 14C is fixed to the desk 20 by contacting a front end portion 14B with the back face of the desk by a screw 14A, resulting with the moving portion 12 fixed to the desk 16. As also shown in
As shown in
link 25 is provided to a position that moves from the center of two prop members 22A and 22B towards the support portion 24 side. The link 25 has an action portion 4C of an operating device 4 (described later) installed rotatably. The action portion 4C is connected to the front end of a piston rod 52 of an extension mechanism 5. The extension mechanism 5 is provided with a cylinder main body 51 which has a cylinder, and a piston which is stored in the cylinder, the piston is connected to a piston rod 52, and the overall length consisting of the cylinder main body 51 and the piston rod 52 is configured to extend and contract by moving the piston within the cylinder.
In the extension mechanism 5, the opposite end of the side that the piston rod 52 protrudes from is rotatably fixed to a supporting base 30, which is fixed to a base 20.
This extension mechanism 5 is a commonly known mechanism, comprising an oil-filled cylinder. Inside, the cylinder is divided into two oil chambers by the piston, and a channel that allows communication between both oil chambers is provided in the piston. By the movement of the piston in the cylinder, the oil in both oil chambers circulates through the channel, or passage formed in the piston. In this passage, provided is a lock valve, which switches between a closed state that shuts off the circulation and an open state that enables circulation. Because the circulation of oil between both oil chambers is shut off in a case when the lock valve is in the closed state, the piston is unable to move in the cylinder, thereby the total length of the extension mechanism 5 becomes unchangeable and locked.
A switching operation of the lock valve is performed against an operating button 53 (refer to
As shown in
Next, an operating device 4 to release a lock of the extension mechanism 5 is explained.
On the attaching portion 46A, the rear end of the operating member 47A is slidably supported by the supporting pin 48A. On the top end of the operating member 47A, a finger hook 471A is formed in an outward curb, and this finger hook 471A is exposed outside from the edge of the placing portion 18 (see
A communicating channel 45C is connected to the cylinder 43C and a conducting tube 42B which is connected through the connecting portion 43B is connected to the communicating channel 45C. The conducting tube 42B is a tubal body formed with a flexible material, and preferably is formed with a thermoplastic resin. By configuring the conducting tube 42B with a soft material, a decrease in the resistance against deformation is achieved, thereby suppressing any excess resistance from occurring when performing the elevation operation of the placing portion 18. Oil is filled in the cylinder 43A on the operating portion 4A side, the cylinder 43C on the action portion 4C side, and the conducting tube 42B, as a pressure communicating medium.
In a case when the oil, that is, the pressure communicating medium, is thermally expanded for some reason, such as an increase in the atmosphere temperature, there may be a possibility that an increase in the volume of the oil pushes the piston 44C and a natural movement of the piston 44C presses the operating button 53 in. In such a case, the lock valve of the extension mechanism 5 is in a half-opened state, which may result in a change in the length of the extension mechanism 5. Alternatively, there may be a possibility of a change in a maneuvering feeling because the gap between the application of the operating pressure and the beginning for action is lessened. However, since the conducting tube 42B is configured with a thermoplastic resin, the temperature of the conducting tube 42B itself increases along with the oil and the conducting tube 42B softens. Because of this, the amount of the deformation allowance for the conducting tube 42B increases and the conducting tube 42B also expands by the expansion of the oil inside. By this expansion of the conducting tube 42B, the increase of volume from the thermal expansion of the oil can be absorbed, thereby suppressing the natural movement of the piston 44C due to the increase in volume and preventing improper operation. Specifically, as the volume of the pressure communicating medium against the area that receives the pressure of the piston 44C on the action side increases, the effect described above is exerted. That is, the distance of the piston 44C increases according to the increase of the volume expansion amount as the volume of the pressure communicating medium increases. In addition, because the conducting tube 42B progressively softens with an increase in temperature, there is no effect to the pressure communicating performance when communicating the operating pressure of the operating portion 4A side to the action portion 4C side.
Action of the operating device 4 configured as described above is hereinafter explained. When hooking a finger on the finger hook 471A and pulling the finger, the operating member 47A presses the piston rod 45A in. As a result, the piston 44A on the operating portion 4A side is pressed by the piston rod 45A, and the oil is pressed out from the cylinder 43A. The pressed out oil flows into the cylinder 43C on the action portion 4C side by conducting tube 42B, pressing out the piston 44C, and pressing the operating button 53 in. As a result, the lock on the extension mechanism 5 is released, thereby the placing portion 18 can be moved vertically. The lock released state can be maintained by maintaining the state where the operating button 53 is pressed constantly.
As shown in
In the present invention, the medium to communicate the operating pressure is fluid, the operating pressure (the force necessary to pull the operating member) can be stabilized without being influenced by the bending amount of the conducting tube 42B or the position of the placing portion 18. The operating device 4 according to the present invention is not limited to be used in the moving apparatus 1 explained above, and it may be used to a mechanism in which the relative position of an operating portion and an action portion changes. Also, the configuration described above is explained by using the case where it is used in the lock release operation of the extension mechanism 5 as an example; however, it may be another mechanism, as long as the mechanism is configured to displace the operating portion.
The base 20 is fixed to the pedestal 151. As described above, the moving device 1 is provided with the moving portion 12, the placing portion 18, and the extension mechanism 5. The operating portion 4A of the operating device 4 is provided on the lower side of the placing portion 18, and the conducting tube 42B is provided between the operating portion 4A and the action portion 4C of the extension mechanism 5.
With the moving device 1, the end of two legs 154a and 154b are configured to position outside of the placing portion 18 when the placing portion is in a use position (a lowermost position).
The moving device 1 configured as described above is generally not to be attached to a desk or a table, and instead may be configured to be able to be used directly by a user who may be sitting on a chair or a sofa, or may be used by a user by pulling the placing portion 18.
The conducting tube 42BA is configured in a helical form, or other generally curved shapes Because of this, the amount of extension of the conducting tube 42BA can be increased, thereby the range of the relative positions of the operating portion 4A and the action portion 4C can also be expanded.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2006-343945 | Dec 2006 | JP | national |
| 2007-250360 | Sep 2007 | JP | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12079194 | Mar 2008 | US |
| Child | 13439802 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11895851 | Aug 2007 | US |
| Child | 12079194 | US |
