JP3517872B2 - Fixing device for recording head in inkjet recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording head fixing device in an inkjet recording device and an inkjet recording device including the fixing device.

[0002]

2. Description of the Related Art In a serial type ink jet recording apparatus, a recording head mounted on a carriage is configured to drive and control the recording head while scanning it along a carriage guide shaft. Conventionally, the electronic circuit board has been arranged on the outer surface of the side wall of the carriage on the garage guide shaft side. This structure is
Since the recording head itself is located on the bottom surface of the carriage and the electronic circuit board for driving the recording head is located on the side wall, there is a problem that the structure becomes complicated and the manufacturing cost increases.

Therefore, it is conceivable to arrange the electronic circuit board on the bottom surface of the carriage in order to bring it closer to the recording head to be controlled. If this happens, when ink leaks to the bottom of the carriage, the leaked ink is leaked. Is
Since it directly flows down to the lower surface of the carriage, there arises a problem that the electronic circuit board existing there is destroyed.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording apparatus in which an electronic circuit board is arranged on the lower surface side of a carriage and the electronic circuit board is not easily destroyed even if ink leaks to the bottom of the carriage. It is to provide a fixing device for a recording head. Furthermore, another problem caused by the electronic circuit board not being destroyed by the leaked ink in this way (details will be described later)
There is also to solve.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is such that a carriage body mounted on a carriage guide shaft and provided with an opening for a recording head at a bottom surface thereof, and an ink. An electronic circuit board is arranged and fixed together with a recording head on the bottom surface of a cartridge and a sub-carriage mounted in the carriage body, and the recording head fixed to the sub-carriage is attached to the carriage body. The sub-carriage is provided with a wall serving as a weir around the sub-carriage so that the ink leaking to the bottom does not directly flow down to the bottom surface of the bottom.
Scanning method for the recording head provided on the bottom of the carriage body
A reference pin that serves as a fulcrum of rotation that holds it so that it can be rotated and displaced in any direction.
And a length that biases the spring force obliquely to the recording head.
A forceful urging lever and the spring force of the urging lever
An angle adjustment member for adjusting the angle of the recording head in the state is provided.
The urging lever has both ends on both sides of the carriage body.
It protrudes outward from the side surface and both ends are fastened.
A fixing device for a recording head in an inkjet recording device, which is rigidly fixed to a carriage body by using a thread .

According to the present invention, the carriage is separated into the carriage body mounted on the carriage guide shaft and the sub-carriage mounted with the ink cartridge, and a wall serving as a weir is provided around the sub-carriage. Since the inner surface of the bottom of the sub-carriage and the lower surface of the bottom are separated from each other, even if ink leaks to the bottom of the sub-carriage, it does not flow down to the lower surface. Therefore, it is possible to provide the electronic circuit board on the bottom surface of the carriage together with the recording head to simplify the structure of the portion, and also to eliminate the problem that the leaked ink immediately damages the electronic circuit board. it can.

Further , according to the present invention, the positioning means is provided with respect to the recording head and a reference pin which is provided on a bottom portion of the carriage body and serves as a rotation fulcrum for rotatably displacing the recording head in the scanning direction. A long biasing lever that biases the spring force diagonally, and an angle adjusting member that adjusts the angle of the recording head in a state of receiving the spring force of the biasing lever. Both ends of the carriage body
Project outward from both sides of the
It is rigidly fixed to the carriage body using the connecting screws.
Therefore, the following operational effects are achieved.

In constructing a color printer using a serial type ink jet recording apparatus, when a recording head is mounted on a carriage, it is possible to perform accurate alignment due to mechanical and mounting tolerances of the recording head. Therefore, there arises a problem that a good color image cannot be formed. Therefore, although a positioning means is provided, the positioning means is generally configured as follows. That is, a reference pin which is provided on the bottom of the carriage body and serves as a rotation fulcrum for rotatably displacing the recording head in the scanning direction, and a long urging member that urges a spring force obliquely to the recording head. It is formed by including a lever and an angle adjusting member for adjusting the angle of the recording head in a state where the spring force of the biasing lever is received. Even after the position adjustment, the conventional urging lever has one end side fixed to the carriage by the fastening screw, but the other end side is pressed against the recording head by the urging force of the spring and is not fixed structure. Is formed in. That is, the recording head is positioned with a flexible structure.

However, since the wall serving as a weir is provided on the sub-carriage to which the recording head is integrally fixed, when the user replaces the ink cartridge, the cartridge is bumped against the wall, or the It may push or pull the wall. Therefore, there arises a problem that the position of the recording head, which is positioned in advance, shifts due to the push and pull with respect to the sub-carriage.

According to the present invention, since the biasing lever is rigidly fixed to the carriage body after the position of the recording head is adjusted, it is large on the wall of the sub-carriage to which the recording head is fixed. Even if a force is applied, the recording head does not move easily, and therefore the recording head is firmly fixed in the pre-positioned position, and the positional deviation can be easily prevented.

Further, since both ends of the urging lever project outward from both side surfaces of the carriage main body and both ends thereof are rigidly fixed to the carriage main body by using fastening screws , the urging lever Since both ends project from both side surfaces of the carriage body, it is possible to easily perform a fastening operation for fastening the fastening screw for firmly fixing the recording head, and it is possible to visually check the fastening operation.

Further, the invention according to the claims 2, in the fixing device of the recording head according to claim 1, the lower surface of the sub-carriage is formed in the stepped structure, and the sub carriage underside by stepped structure A gap is provided between the recording head and the electronic circuit board, the biasing lever is arranged through the gap, and the point of action of the spring force on the recording head is also in the gap. It is characterized by. According to the present invention, since a force can be applied to the recording head and the sub-carriage to which the recording head is fixed in the vicinity of the joint surface, the rigid fixed state can be strengthened in a well-balanced manner.

According to a third aspect of the present invention, in the recording head fixing device according to the first or second aspect , by rigidly fixing the biasing lever, the bottom surface of the carriage main body of the recording head. The portion opposed to is pressed against the bottom surface of the carriage body. According to the present invention, the recording head can be more firmly fixed to the carriage body by the action of the pressing force.

The invention according to claim 4 of the present application is an ink jet recording apparatus comprising the recording head fixing device according to any one of claims 1 to 3 . According to the recording apparatus of the present invention, it is possible to reliably prevent careless displacement of the recording head, and therefore it is possible to print a good recorded image for a long period of time.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing a fixing device of a recording head in an ink jet recording apparatus according to the present invention, FIG. 2 is a plan view showing a state in which a sub-carriage is removed from FIG. 1, and FIG. 3 is a perspective view of the sub-carriage. Figure 4
FIG. 6 is a perspective view of the lower surface side of the sub-carriage.

As shown in these figures, in the recording head fixing device according to the present embodiment, the carriage mounted on the carriage guide shaft 1 has a carriage main body 2 and a sub-carriage mounted inside the carriage main body 2. It is separated into 3. That is, the opening 6 for the recording head 5 is formed on the bottom surface 4.
And a sub-carriage 3 in which an ink cartridge (not shown) is mounted and an electronic circuit board 8 is fastened and fixed together with the recording head 5 on the lower surface 7 of the bottom by a fastening screw 9 or the like. There is.

As shown in FIGS. 2 and 4, the recording head 5 and the electronic circuit board 8 are unitized and integrally formed. Then, with the nozzle 10 portion of the recording head 5 protruding downward (upward in FIG. 4), the sub-carriage 3
It is formed so as to be integrally attached to the bottom surface 7 of the bottom part by fastening screws 9. In FIG. 2, reference numeral 11 indicates a hole through which the fastening screw 9 is inserted. The subcarriage 3
Is formed so that the nozzle 10 portion of the recording head 5 projects downward from the opening 6 when mounted in the carriage body 2.

As shown in FIGS. 1 and 3, an ink supply needle 13 for black ink is provided on the bottom portion 12 of the sub-carriage 3.
And three ink supply needles 14, 14, 1 for three colors
4 is projected. A partition wall 15 is provided between the ink supply needles 13 and 14, a black ink cartridge (not shown) is attached to a portion where the ink supply needle 13 is present, and a portion where other ink supply needles 14 are present. Is equipped with a color ink cartridge (not shown). The bottom portion 12 of the sub-carriage 3 is formed to have a floor structure for preventing water leakage except for the ink supply needle portion, and a wall 23 that serves as a weir around the bottom portion 12 so that the ink leaking to the bottom portion 12 does not directly flow down to the bottom surface 7 of the bottom portion. Are integrally formed.

In FIG. 1, reference numeral 16 indicates a passage for black ink, reference numerals 17, 17, 17 indicate passages for color ink, and these passages 16, 17 are provided on the lower surface 7 of the sub-carriage 3. It is provided in the passage storage unit 22. Then, the passages 16 and 17 pass from the ink supply needles 13 and 14 through the outflow holes 18, 19, 19 and 19 formed on the lower surface of the bottom of the sub-carriage 3, and are connected to the outflow holes 18 and 19. The ink flows into the recording head 5 through the communicating inflow holes 20, 21, 21, 21 (FIG. 2) on the recording head 5 side, and the nozzles 10 are controlled by the drive control of the head 5.
It is designed to be discharged from each of.

The positioning means 24 for moving and positioning the recording head 5 fixed to the sub-carriage 3 with respect to the carriage body 2 will be described with reference to FIG. The positioning means 24 is provided integrally with the bottom portion 4 of the carriage main body 2 and serves as a reference pin 25 serving as a rotation fulcrum for rotatably holding the recording head 5 in the scanning direction.
And a long biasing lever 26 that biases the spring force F obliquely with respect to the recording head 5, and the angle of the recording head 5 in a state of receiving the spring force F of the biasing lever 26. The angle adjusting member 27 is provided. The spring force F of the urging lever 26 is recorded by applying an elastic force of the spring to a portion indicated by an arrow SP in FIG. 2 with the lever 26 serving as a fulcrum on a fulcrum portion 28 provided on the bottom portion 4 of the carriage body. It is formed so as to occur at a contact point (action point) 29 with the head 5 side.

The angle adjusting member 27 includes the biasing lever 2
6 for adjusting the angle of the recording head 5 in the state of receiving the spring force F, and is configured as follows.
An adjustment lever 31 is rotatably attached below the side wall 30 of the carriage body 2, and the support shaft 3 of the adjustment lever 31 is attached to the adjustment lever 31.
A disc 33 having an outer periphery as a cam surface is attached to a part of the disc 2 in an eccentric state, and the disc 33 is attached to the recording head 5.
2 and the disk 33 is rotated by the adjusting lever 31, the recording head 5 is slightly rotated against the spring force F to perform positioning adjustment. It is formed so that it can.

The urging lever 26 is provided on the carriage body 2 after the position adjustment by the angle adjusting member 24 is completed.
It is formed so that it can be rigidly fixed to. here,
"Rigidly fixed" is a concept of "flexible fixing" that is fixed in a state of being pressed by elastic force such as spring force, and means firmly and firmly fixed so as not to move carelessly. . Specifically, as shown in FIG. 2, it can be said that the both ends of the long biasing lever 26 are firmly fixed to the carriage body 2 by the fastening screws 34, 34.

In this embodiment, as shown in FIGS. 1 and 2, the biasing lever 26 has both ends projecting outward from both side surfaces of the carriage body 2 and both ends fastening screws 34, 34. Is rigidly fixed to the carriage body 2. As a result, both ends of the urging lever 26 project from both side surfaces of the carriage body 2, so that the fastening screws 34 and 3 for firmly fixing the recording head 5 are provided.
The fastening work of 4 can be easily performed, and the confirmation can be visually performed easily.

Further, in the present embodiment, the lower surface 7 of the sub-carriage 3 is formed with a step structure 35, and the step structure 35 is provided between the sub-carriage lower surface 7 and the recording head 5 and the electronic circuit board 8. A gap 36 is provided in the urging lever 26 and the urging lever 26 is disposed through the gap 36, and the point of action 2 of the spring force F on the recording head 5 is applied.
9 is also formed so as to be in the gap 36. As a result, the recording head 5 and the sub-carriage 3 to which it is fixed
On the other hand, since a force can be applied in the vicinity of the joint surfaces of each other, the rigid fixed state can be strengthened in good balance.

Next, the operation of the above embodiment will be described. According to the above-described embodiment, the carriage main body 2 mounted on the carriage guide shaft 1 and the sub-carriage 3 mounted with the ink cartridge are separated from each other, and a wall 23 serving as a weir is provided around the sub-carriage 3. Since the bottom inner surface 12 of the sub-carriage 3 and the bottom lower surface 7 of the sub-carriage 3 are separated from each other, even if the ink leaks to the bottom 12 of the sub-carriage 3, the ink does not immediately flow down to the lower surface 7 side. Therefore, the electronic circuit board 8 can be provided on the bottom surface of the carriage together with the recording head 5 to simplify the structure of that portion, and there is no problem that the leaked ink immediately destroys the electronic circuit board 8. .

The long urging lever 26, which constitutes the positioning means 24, is moved to the carriage main body 2 after position adjustment.
What is formed so as to be rigidly fixable with respect to the above has the following effects. Since the wall 23 that serves as a weir is provided in the sub-carriage 3 to which the recording head 5 is integrally fixed, when the user replaces the ink cartridge or the like, the cartridge collides with the wall 23 or the wall is erroneously mistaken. 23 may be pushed or pulled, but according to the present embodiment, the biasing lever 26 is rigidly fixed to the carriage body 2 after the position adjustment of the recording head 5 as described above. However, even if a large force is applied to the wall 23 of the sub-carriage 3 to which the recording head 5 is fixed, it does not move easily. Therefore, the recording head 5 is firmly fixed in a prepositioned position, and the position shift occurs. Can be prevented.

[0027]

According to the present invention, by separating the carriage into the carriage main body and the sub-carriage on which the ink cartridge is mounted, and providing a wall serving as a dam around the sub-carriage, the inner surface of the bottom portion of the sub-carriage is provided. Since the side and the lower surface of the bottom portion are separated from each other, even if ink leaks to the bottom portion of the sub-carriage, the ink does not directly flow down to the lower surface side. Therefore, the electronic circuit board can be provided on the bottom surface of the carriage together with the recording head to simplify the structure of the portion, and the problem that the electronic circuit board is immediately destroyed by the leaked ink can be eliminated.

In the case where the urging lever is rigidly fixed to the carriage body after the position of the recording head is adjusted, a large force acts on the wall of the sub-carriage to which the recording head is fixed. But it doesn't move easily. Therefore, the recording head is firmly fixed to the prepositioned position, and it is possible to prevent the careless displacement.

[Brief description of drawings]

FIG. 1 is a plan view showing a fixing device of a recording head in an inkjet recording device according to the present invention.

FIG. 2 is a plan view showing a state in which a sub-carriage is removed from FIG.

FIG. 3 is a perspective view of a sub-carriage.

FIG. 4 is a perspective view of the lower surface side of the sub-carriage.

[Explanation of symbols]

2 Carriage body 3 subcarriage 4 bottom 5 recording head 6 openings 7 Bottom surface 8 Electronic circuit board 9 Fastening screws 10 nozzles 12 bottom 23 wall (weir) 24 Positioning means 25 reference pin 26 Biasing lever 27 Angle adjustment member 29 This contact (point of action) 31 Adjustment lever 33 discs 34 Fastening screw 35 step structure 36 gap F Spring force

Claims (4)

(57) [Claims] 1. A carriage body mounted on a carriage guide shaft and provided with an opening for a recording head on a bottom surface, and an ink cartridge mounted on the bottom surface of the bottom of which an electronic circuit board is arranged and fixed together with the recording head. The sub-carriage is equipped with a sub-carriage mounted in the carriage main body, and a positioning means for moving and positioning the recording head fixed to the sub-carriage with respect to the carriage main body. ink weir become walls provided around directly so as not to flow down to the bottom lower surface, said positioning means, provided at the bottom of the carriage body
A rotation that holds the recording head so that it can be rotationally displaced in the scanning direction.
The reference pin, which is the fulcrum, and diagonal to the recording head
Long biasing lever for biasing the spring force to the spring, and the biasing lever
Adjust the angle of the recording head under the above-mentioned spring force
And an angle adjusting member that is provided on both sides of the carriage body.
It projects further outward, and both ends of it have fastening screws.
A recording head fixing device in an inkjet recording device, characterized in that it is rigidly fixed to the carriage body by using . 2. The lower surface of the sub-carriage according to claim 1 , wherein the lower surface of the sub-carriage has a step structure, and a gap is provided between the lower surface of the sub-carriage and the recording head and the electronic circuit board by the step structure. The recording head fixing device in an ink jet recording apparatus, wherein the lever is arranged through the gap, and the point of action of the spring force on the recording head is also in the gap. 3. The structure according to claim 1 , wherein the biasing lever is rigidly fixed so that the portion of the recording head facing the bottom surface of the carriage body is pressed against the bottom surface of the carriage body. A fixing device for a recording head in an inkjet recording device. 4. An ink jet recording apparatus comprising the recording head fixing device according to any one of claims 1 to 3 .