The present invention relates to a support structure for ink cartridge installed detachably in a printing apparatus such as an inkjet printer.
Conventionally, personal or business computers have, as a peripheral, a printing apparatus with an ink cartridge mounted on a carriage, such as an inkjet printer or a bubble jet printer.
a) and 10(b) illustrate an example of a conventional support structure for ink cartridge. In the illustrated example, ink cartridges 21 are supported firmly by being pressed from front to rear, from side to side, and from top to bottom, by a carriage 22. The carriage 22 is guided by a guide shaft 22a which is mounted on a frame of an apparatus body, so as to be reciprocatable in a main scanning direction. Note that the support structure is “2-pen” type, i.e., the structure holds the two ink cartridges 21, 21 in alignment.
More specifically, the ink cartridges 21 are pressed from top to bottom by an upper pressure member 27. The upper pressure member 27 is rotatably attached to an upper cover 24 which is pivotably connected to the carriage 22. The ink cartridges 21 are also pressed from front to rear, i.e., from right to left in
In
Also, even with the upper cover 24 opened, the front pressure member 26 projecting at the front of the cover 24 is an obstacle in mounting or dismounting the cartridges 21 in a downward or upward direction. Furthermore, the lateral pressure member 28 still presses the ink cartridges 21 from leftwards, thereby preventing the cartridges 21 from being dismounted smoothly.
Thus, the conventional support structure for ink cartridge prevents smooth mounting and dismounting of the ink cartridges 21.
A feature of the present invention is to offer a durable support structure for ink cartridge allowing smooth mounting and dismounting of ink cartridge, as well as simplified assembly and adjustment operations of components.
(1) A support structure for ink cartridge of the invention which is provided detachably in an ink jet printing apparatus includes:
a carriage for reciprocating in a main scanning direction, the carriage having a rear wall for supporting a rear surface of the ink cartridge, a base for supporting a bottom surface of the ink cartridge, and a first lateral wall for supporting a first lateral surface of the ink cartridge;
a front cover connected to the carriage openably and closably in a horizontal direction, the front cover pressing a front surface of the ink cartridge toward the rear surface and pressing a second lateral surface of the ink cartridge toward the first lateral surface thereof; and
an upper cover connected to the carriage openably and closably in a vertical direction, the upper cover pressing a top surface of the ink cartridge toward the bottom surface.
The configuration allows the ink cartridge to be mounted or dismounted smoothly, because there is no obstacle at the front and top of the ink cartridge when the front cover is pivoted in the horizontal direction to be opened and the upper cover is pivoted upwards to be opened.
Also, the carriage presses the ink cartridge as mounted from front to rear, from top to bottom, and from side to side. The carriage thus supports the cartridge firmly while traveling, thereby ensuring electric continuity between the carriage and the ink cartridge and thus a constant high-quality level of printing.
(2) The front cover has a front pressure member for pressing the front surface of the ink cartridge toward the rear surface thereof.
The front pressure member provided in the front cover is configured to press the front surface of the ink cartridge toward the rear surface thereof by an elastic force exerted by an elastic member such as a plate spring. This configuration ensures that the ink cartridge is pressed firmly.
(3) The front cover has a lateral pressure member for pressing the second lateral surface of the ink cartridge toward the first lateral surface thereof.
The lateral pressure member provided in the front cover is configured to press the second lateral surface of the ink cartridge toward the first lateral surface thereof by an elastic force exerted by an elastic member such as a plate spring. This configuration ensures that the ink cartridge is pressed firmly.
(4) The upper cover has an upper pressure member for pressing the top surface of the ink cartridge toward the bottom surface thereof.
The upper pressure member provided in the upper cover is configured to press the top surface of the ink cartridge toward the bottom surface thereof by an elastic force exerted by an elastic member such as a piece of rubber or a torsion coil spring. This configuration ensures that the ink cartridge is pressed firmly.
(5) The front cover and the upper cover are connected to move in conjunction with each other, so that open and close operation of either one of the front cover and the upper cover involves open and close operation of the other one.
This configuration allows open and close operation of either one of the front cover and the upper cover to involve open and close operation of the other one. Accordingly, the ink cartridge is mounted or dismounted smoothly.
(6) The front cover and the upper cover are connected to move in conjunction with each other through a bevel-gear mechanism.
The front cover and the upper cover are connected through the bevel-gear mechanism. The simple connecting mechanism allows open and close operation of either one of the front cover and the upper cover to involve open and close operation of the other one.
(7) The front cover and the upper cover are connected to move in conjunction with each other through a cam mechanism.
The simpler and more durable connecting mechanism allows open and close operation of either one of the front cover and the upper cover to involve open and close operation of the other one.
(8) The upper cover includes a detecting member for detecting whether an ink cartridge as mounted is a proper one.
The detecting member prevents troubles caused by mismounting of ink cartridge.
a) to 1(c) are views illustrating construction of relevant parts of an inkjet printer according to an embodiment of the invention;
a) to 7(b) are views illustrating how the front cover and the upper cover of the carriage operate in conjunction with each other;
a) to 8(b) are views illustrating how a detecting member according to another embodiment of the present invention detects a proper ink cartridge as mounted;
a) to 9(b) are views illustrating how the detecting member detects an improper ink cartridge to be mounted; and
a) to 10(b) are views illustrating an example of a conventional support structure for ink cartridge.
With reference to the drawings, a support structure for ink cartridge according to an embodiment of the present invention is described in detail below. The invention is not to be considered limited to what is shown in the drawings and described in the specification.
a) to 1(c) are views illustrating construction of relevant parts of an inkjet printer according to the embodiment.
In
As shown in
Described below with reference to
As shown in
An upper cover 7 is attached to the carriage 2 through a spindle 7a and an upper cover release spring 7b so as to be pivotable, i.e., openable and closeable in a vertical direction. The upper cover 7 presses a top surface of the ink cartridge 1 toward a bottom surface thereof. A detecting rib (detecting member) 7d integrated with the upper cover 7 is provided for detecting whether a proper ink cartridge is mounted on the carriage 2. Provided at an inner part of the upper cover 7 is an upper pressure member 8 made of an elastic member such as a piece of rubber or a plate spring.
Provided at an inner part of the front cover 5 is a lateral pressure member 9 made of an elastic member such as a piece of rubber or a plate spring. With the ink cartridge 1 mounted on the carriage 2, the lateral pressure member 9 presses a left lateral surface of the ink cartridge 1, so that a right lateral surface thereof is pressed firmly against the first lateral wall 2b. A lock lever 10 is pivotably attached to a corner part of an open end of the front cover 5. When the ink cartridge 1 is to be replaced, the lock lever 10 is unlatched from, and latched again to, a front-end part of the first lateral wall 2b.
As viewed from above, the front cover 5 is formed in the shape of the letter L, as in
The front pressure member 6 provided at the inner part of the front cover 5 is elastically biased by the elastic member such as a plate spring. With the ink cartridge 1 mounted, the front pressure member 6 presses the front surface of the ink cartridge 1, so that the rear surface thereof is pressed firmly against the rear wall 2a. The front pressure member 6 is attached pivotably at a top part thereof to the front cover 5 through the spindle 6a. A lower portion of the member 6 is elastically biased towards the rear wall 2a by a plate spring 6b.
The upper cover 7 has a base which includes a not-shown connecting portion. The cover 7 is connected pivotably, i.e., openably and closably in a vertical direction, at the base to the carriage 2 through an upper cover engaging cam 7d provided in the spindle 7a. With the ink cartridge 1 mounted, the upper pressure member 8 provided at the inner part of the upper cover 7 presses the top surface of the ink cartridge 1 toward the bottom surface thereof. The bottom surface is thus stably situated on the base 2c. In
With the ink cartridge 1 mounted, the lateral pressure member 9 provided at the inner part of the front cover 5 presses the left lateral surface of the ink cartridge 1, so that the right lateral surface thereof is pressed firmly against the first lateral wall 2b.
Thus, the carriage 2 supports firmly the ink cartridge 1 as mounted by pressing the cartridge 1 from front to rear, from top to bottom, and from side to side. This serves to avoid jounce of the ink cartridge 1 during scanning movement of the carriage 2, thereby ensuring electric continuity between the carriage 2 and the ink cartridge 1 and thus a constant high-quality level of printing.
When the ink cartridge 1 is to be replaced, the lock lever 10 is operated to open the front cover 5. The operation of the lock lever 10 automatically causes a not-shown torsion spring to act to open the front cover 5. Then, the upper cover 7 is opened automatically, as shown in
As described above, the lateral pressure member 9 provided at the inner part of the front cover 5 presses the left lateral surface of the ink cartridge 1, and a reaction force is thus exerted on the pressure member 9. When the front cover 5 is to be opened, the reaction force facilitates the opening operation of the cover 5 from the ink cartridge 1.
With the cover 5 opened, there is no obstacle, in the front, left, and top sides of the ink cartridge 1, in dismounting the cartridge 1. Accordingly, the ink cartridge 1 is dismounted smoothly without being damaged. Likewise, the ink cartridge 1 is mounted smoothly with no obstacle in the front, left, and top sides thereof.
In the present embodiment, the front cover 5 is connected openably and closably to the left side of the carriage 2. However, the invention is not limited to the foregoing. The cover 5 may be connected openably and closably to the right side of the carriage 2. In the case, the first lateral wall 2b is provided on the left side of the carriage 2 so that a left lateral surface of the ink cartridge 1 is pressed against the wall 2b.
a) to 7(b) are views illustrating how the front cover and the upper cover of the carriage operate in conjunction with each other. In
In the present embodiment, the front cover 5 and the upper cover 7 are respectively integrated with not-shown separate rotating shafts. Provided on the shafts are a front cover engaging cam 5c and an upper cover engaging cam 7c, respectively, as illustrated in
Alternatively, the upper cover release spring 7b elastically biases the upper cover 7 in such a direction as to close the cover 7. In the case, when a user operates to open the front cover 5, a force exerted on the cover 5 acts to open the cover 7. Further alternatively, when the upper cover 7 is opened or closed, the front cover 5 may be opened or closed in conjunction with the cover 7 by the cam mechanism including the engaging cams 5c and 7c.
More Specifically, either one of the front cover 5 and the upper cover 7 is opened or closed in conjunction with the open/close operation of the other. This allows smooth mounting or dismounting of the ink cartridge 1.
Substitutable for the cam mechanism is a bevel-gear mechanism. An example of such bevel-gear mechanism is a mechanism including bevel gears which are provided on the spindle 5a and the spindle 7c, respectively, so as to be meshed with each other. The bevel-gear mechanism eliminates the need for a spring for elastically biasing either one of the cover 5 and the cover 7. However, it is to be noted that the bevel-gear mechanism, unlike the cam mechanism, involves complicated operation processes of assembling and adjusting the carriage 2, with a potential decrease in durability of the carriage 2.
Described below with reference to
Illustrated in
Illustrated in
In the present embodiment, the detecting device 1a and the detecting ribs 7d to fit in the device 1a are configured to detect whether the ink cartridge 1 is a proper one. However, it is to be noted that the present invention is not limited to what is described in the present embodiment. An alternative device such as an electric contact structure or a photosensor may be provided for detecting whether the ink cartridge 1 is a proper one.
Also, the front pressure member 6 and the lateral pressure member 9 provided in the front cover 5, and the upper pressure member 8 provided in the upper cover 7 may be omitted. In the case, a projecting portion for pressing the surface of the ink cartridge 1 should be formed in each of the front inner side and lateral inner side of the front cover 5 and in the inner side of the upper cover 7. It is preferable that the projecting portions have appropriate elasticity.
As is clear from the foregoing, the present invention has the following advantageous features.
(1) The carriage supports the rear surface, bottom surface, and first side surface of the ink cartridge. Also, the front cover presses the front surface of the ink cartridge toward the rear surface thereof and presses the second side surface of the cartridge toward the first side surface thereof. Further, the upper cover presses the top surface of the cartridge toward the bottom surface thereof. The carriage thus holds the ink cartridge firmly by pressing the cartridge from front to rear, top to bottom, and side to side. Accordingly, the carriage supports the ink cartridge stably while reciprocating in the main scanning direction, thereby ensuring electric continuity between the carriage and the ink cartridge and thus high print quality.
When the ink cartridge is to be dismounted, the front cover is pivoted in the horizontal direction to be opened, and the upper cover is pivoted upward to be opened. With no obstacle at the front and top thereof, the ink cartridge is mounted or dismounted smoothly.
(2) The front pressure member provided in the front cover is configured to press the front surface of the ink cartridge toward the rear surface thereof by an elastic force exerted by an elastic member such as a plate spring. This configuration ensures that the ink cartridge is pressed firmly.
(3) The lateral pressure member provided in the front cover is configured to press the second side surface of the ink cartridge toward the first side surface thereof by an elastic force exerted by an elastic member such as a plate spring. This configuration ensures that the ink cartridge is pressed firmly.
(4) The upper pressure member provided in the upper cover is configured to press the top surface of the ink cartridge toward the bottom surface thereof by an elastic force exerted by an elastic member such as a piece of rubber. This configuration ensures that the ink cartridge is pressed firmly.
(5) Open and close operation of either one of the front cover and the upper cover involves open and close operation of the other one. Accordingly, the ink cartridge is mounted or dismounted smoothly.
(6) The respective spindles of the front cover and the upper cover are connected through the bevel-gear mechanism to move in conjunction with each other. The simple connecting mechanism allows open and close operation of either one of the front cover and the upper cover to involve open and close operation of the other one.
(7) The respective spindles of the front cover and the upper cover are connected through the cam mechanism to move in conjunction with each other. The simple connecting mechanism allows open and close operation of either one of the front cover and the upper cover to involve open and close operation of the other one. Also, the cam mechanism is easier to be assembled and adjusted, and more durable, than the bevel-gear mechanism.
(8) The detecting member provided in the upper cover allows detection on whether an ink cartridge being mounted is a proper one. This prevents troubles involved by mismounting of ink cartridge.
Number | Date | Country | Kind |
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2002-296309 | Oct 2002 | JP | national |
2002-372701 | Dec 2002 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP03/12814 | 10/7/2003 | WO | 00 | 4/7/2005 |
Publishing Document | Publishing Date | Country | Kind |
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WO2004/033215 | 4/22/2004 | WO | A |
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2001-096764 | Apr 2001 | JP |
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Number | Date | Country | |
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20060066694 A1 | Mar 2006 | US |