JP4433038B2 - Recording device - Google Patents

Description

The present invention relates to a recording apparatus that performs a predetermined recording operation on a sheet.

2. Description of the Related Art Conventionally, a recording apparatus such as a printer is provided with a recording head for performing a recording operation on a sheet. Such a recording head is usually mounted on a carriage provided so as to be movable along the width direction of the paper, and a flexible wiring board for driving the recording head is connected thereto. A wiring board connected to a circuit on the recording apparatus main body side is connected to the flexible wiring board, and predetermined printing is performed by controlling the recording head from the main body side via the flexible wiring board. .

Examples of such a recording head include an ink jet head, a dot impact type head, and a thermal transfer type head. Among these, the ink jet head has a relatively simple configuration, and can easily perform high-speed printing and high quality printing. Known as a recording head.

For example, as shown in FIG. 11, this type of inkjet head includes a head holder 2 to which an ink cartridge 1 filled with ink is mounted, and a manifold 9 and an actuator 8 attached to the head holder 2. I have.

The ink cartridge 1 includes a porous material accommodation chamber 4 that contains a porous material made of resin and impregnated with ink, and an ink chamber 5 that is defined by the porous material accommodation chamber 4. An ink supply port 6 is formed in the ink chamber 5. The head holder 2 is made of resin and accommodates the ink cartridge 1, and in the accommodated state, a communication hole 7 is formed at a position facing the ink supply port 6 of the ink chamber 5.

The manifold 9 is made of resin, and is formed continuously with the ink introduction path 11 having the ink introduction path 10 connected to the ink supply port 6 of the ink cartridge 1, and supplies ink to the actuator 8. And an ink supply unit 13 having an ink supply path 12.

A seal member 14 made of a ring-shaped elastic material is bonded and fixed to the inner peripheral surface of the communication hole 7 of the head holder 2. By inserting the ink introducing portion 11 into the seal member 14, The ink introduction path 10 is connected to the ink supply port 6 through the seal member 12.

In addition, a base plate 15 made of a metal material is interposed between the head holder 2 and the ink supply unit 13, and the ink supply unit 13 is bonded and fixed to the base plate 15, so that the actuator 8 is connected to the base plate 15. It is supported by the base plate 15. The base plate 15 is bonded and fixed to the head holder 2.

The actuator 8 is made of a piezoelectric ceramic material or the like, and includes a plurality of ejection channels (not shown) that contain ink, and an ejection energy generation unit (the ejection energy generation unit that ejects ink contained in each ejection channel as droplets from the nozzles). (Not shown). A COB (chip-on-board) board 17 on which a drive circuit for generating an injection pulse signal for controlling the drive of the actuator 8 is mounted is connected to the injection energy generating section via a flexible wiring board 16. .

When the head holder 2 is mounted on a carriage (not shown), the COB substrate 17 is brought into contact with the wiring board on the carriage and the mutual contacts. In this state, the head holder 2 is attached to the carriage. The locking member to be fixed applies a pressing force to the contact point so that the contact state of both the contact points is maintained. The wiring board on the carriage is connected to a control circuit board on the recording apparatus main body side via a flexible cable as is well known.

The ink in the ink cartridge 1 is supplied from the ink supply port 6 to the ink supply path 12 via the ink introduction path 10 in the manifold 9, and from each ink supply path 12 to each ejection channel of the actuator 8. It is distributed and supplied inside. The ink supplied to each ejection channel is ejected as droplets from the nozzle when the volume is reduced by the ejection energy generator changing the volume of each ejection channel in accordance with the ejection pulse signal from the COB substrate 17. On the other hand, when the volume is increased, the ink is again introduced from the ink supply path 12 into the ejection channel, and a predetermined print is formed on the sheet by repeating such an operation.

An object of the present invention is to provide a recording apparatus that can achieve improvement in production efficiency and downsizing of an apparatus by devising the arrangement of a flexible wiring board in a device including a plurality of recording elements or a plurality of actuators. .

In order to achieve the above object, the invention described in claim 1 is directed to a first and a second actuator for performing a recording operation by a recording element on a recording medium, and to drive the recording element of the first actuator. as a first flexible wiring board whose one end to the first actuator is connected, a second flexible that the one end thereof a second actuator for driving the recording element of the second actuator is connected to the A wiring board; and a support member that supports the first and second actuators. The support member is opposed to each other at a lower wall that supports the first and second actuators and at both left and right ends of the lower wall. A box having a pair of left and right side walls, and in order to support the first and second actuators on the lower wall, And mounting means for pressing and positioning the second actuator so that the two actuators are positioned adjacent to each other. The pair of side walls are provided at the other ends of the first and second flexible wiring boards. A pair of second wiring boards having contacts to be connected to the contact points, and a pair of presses for connecting the contacts of the first and second flexible wiring boards to the contacts of the pair of second wiring boards and means, a pull from the bottom wall supporting said first and second actuator said first and second flexible wiring board, the second ends of side is, outward in the opposite direction to the other of said actuator turned, rising along the side wall, said a pair of press means are respectively connected to the second wiring plate of the pair, the pair of pressing means, these pressing force Without affecting the positioning of the first and second actuators by the mounting means, the contacts of the first and second flexible wiring boards are pressed against the contacts of the pair of second wiring boards, The first and second flexible wiring boards are connected to the pair of second wiring boards .

According to a second aspect of the present invention, in the recording apparatus according to the first aspect, the mounting unit includes a biasing unit that presses the first and second actuators from a side of the lower wall. The urging means presses the first and second actuators, and the pair of pressing means presses the first and second flexible wiring boards against the pair of second wiring boards. It is characterized in that the direction to be parallel is parallel .

According to the present invention, the free end of the first flexible wiring board connected to the first actuator and the free end of the second flexible wiring board connected to the second actuator are opposite to the other actuators, respectively. Detachably attached to the second wiring board, which is routed outward in the direction and rises along the left and right side walls, and is fixed to the support member, independent of the support to the lower wall of the actuator. Connected as possible. That is, it becomes a left-right symmetric structure, and it can achieve improvement in production efficiency and downsizing of the apparatus. In addition, by connecting the flexible wiring board to the second wiring board, the position of the recording element can be accurately maintained without affecting the positioning of the recording element, and good print formation can be achieved.

FIG. 1 is a perspective view showing an embodiment of a color ink jet printer as a recording apparatus of the present invention. In FIG. 1, this color inkjet printer 21 is for printing on an ink cartridge 22 as an ink supply member filled with four color inks of cyan, magenta, yellow and black, and on a paper 23 as a recording medium. An inkjet head 24 as a recording head, a carriage 26 as a support member on which the ink cartridge 22 and the inkjet head 24 are mounted, a drive unit 27 for reciprocating the carriage 26 in a linear direction, and a reciprocating movement of the carriage 26. A platen roller 28 extending in the direction and disposed opposite to the inkjet head 24 and a purge device 29 are provided.

The drive unit 27 is disposed at the lower end portion of the carriage 26 and extends parallel to the platen roller 28, the guide plate 31 is disposed at the upper end portion of the carriage 26 and extends parallel to the carriage shaft 30, and the carriage shaft 30. Two pulleys 32 and 33 disposed between both ends of the carriage shaft 30 between the guide plate 31 and an endless belt 34 spanned between the pulleys 32 and 33 are provided.

A carriage shaft support portion 35 through which the carriage shaft 30 can be inserted is provided at the lower end portion of the carriage 26, and a guide plate contact portion 36 that can contact the guide plate 31 is provided at the upper end portion of the carriage 26. ing. An endless belt 34 is joined to the rear side surface of the carriage 26.

When one pulley 32 is rotated forward and backward by driving the motor 32 </ b> A, the carriage 26 joined to the endless belt 34 is moved along with the forward and reverse rotation of the pulley 32 to the carriage shaft 30 and the guide plate 31. , Along the width direction of the paper 23, is linearly reciprocated.

The paper 23 is fed from a paper feed cassette (not shown) provided on the side of the ink jet printer 21, introduced between the ink jet head 24 and the platen roller 28, and ink ejected from the ink jet head 24. The predetermined printing is performed, and then the paper is discharged. In FIG. 1, the paper feed mechanism and paper discharge mechanism for the paper 23 are not shown.

The purge device 29 is provided on the side of the platen roller 28 and is disposed so as to face the inkjet head 24 when the head unit 25 is at the reset position. The purge device 29 is used to prevent ejection failure caused by ink retention or bubble growth when the ink is initially introduced into the inkjet head 24. That is, the purge device 29 includes a protective cap 37 that can cover the inkjet head 24, a pump 38 and a cam 39, and an ink reservoir 40. When the head unit 25 is at the reset position, the inkjet head 24 is The ink jet head 24 is recovered by sucking the defective ink containing the bubbles and the like covered with the protective cap 37 and containing the bubbles inside the ink jet head 24 by the pump 38 by driving the cam 39. The sucked defective ink is stored in the ink storage unit 40.

2 is an exploded perspective view of the ink jet head as viewed from below, FIG. 3 is an exploded perspective view of the ink jet head as viewed from above, FIG. 4 is a side sectional view of the main portion of the ink jet head, and FIG. FIG. 6 is a perspective view for explaining the connection of the flexible wiring board, FIG. 7 is a cross-sectional perspective view of the main part of the carriage, and FIG. 8 is an ink jet head and an ink cartridge attached in FIG. 9 is a front view in FIG. 8, and FIG. 1010 is a cross-sectional view taken along line BB in FIG. Next, the assembly of the inkjet head 24 and the inkjet head 24 to the carriage 26 will be described with reference to FIGS.

As shown in FIGS. 2 to 5, the inkjet head 24 includes an actuator 70 having a nozzle 75 for ejecting ink, and a manifold as a flow path forming member for supplying ink from the ink cartridge 22 to the actuator 70. 71 and a joint unit 47, and a base plate 46 that supports the actuator 70 and the manifold 71 on one surface and is attached to the other surface.

As shown in FIGS. 2 and 3, the joint unit 47 includes an upper joint 52 and a lower joint 53 made of resin. As shown in FIG. 4, the upper joint 52 is provided with guide portions 54 for guiding the mounting of the ink cartridge 22 so as to protrude upward at the front end portion and the rear end portion, respectively. Two ink introduction ports 55 into which ink from the ink cartridge 22 is introduced are formed upward on the rear side. Further, the upper joint 52 is formed with claw portions 56 to be attached to the base plate 46 so as to protrude downward at the front end portion and the rear end portion thereof. Each ink introduction port 55 is provided with a seal member 57 for connection to a supply unit 66 (see FIGS. 8 and 9) of the ink cartridge 22. Further, at the lower end portion of the upper joint 52, projections 86 are formed at the four corners facing the manifold 71 in a state where the inkjet head 24 is assembled, and projecting toward the base plate 46. Two upper flow path grooves 61 are formed on the lower surface along the length direction thereof.

In the lower joint 53, two ink supply cylinders 58 for supplying ink to the manifold 71 are formed so as to protrude downward on the front side thereof, and the upper surface thereof extends along the length direction thereof. Thus, two lower flow channel grooves 62 are formed.

As shown in FIGS. 4 and 5, the upper joint 52 is formed with a joint protrusion 59 for joining with the lower joint 53, and the lower joint 53 is joined for joining with the upper joint 52. A groove 60 is formed, and the joint protrusion 59 is ultrasonically welded to the bottom of the joint groove 60, so that the upper joint 52 and the lower joint 53 are joined in an airtight manner. Two ink passages 63 that are independent of each other are formed between the two upper channel grooves 61 formed on the upper surface of the lower joint 53 and the two lower channel grooves 62 formed on the upper surface of the lower joint 53. One end of each ink passage 63 communicates with the ink introduction path 64 in each ink introduction port 55 of the upper joint 52, and the other end of each ink passage 63 has an ink supply path in each ink supply cylinder 58 of the lower joint 53. Two independent ink flow paths are formed in the joint unit 47 by the ink introduction path 64, the ink passage path 63, and the ink supply path 65.

Further, a filter 82 is provided in each ink passage path 63 on the upstream side of the ink supply path 65. The filter 82 is formed to have a filter diameter smaller than a nozzle diameter of a nozzle 75 described later, and is provided to remove dust, bubbles, and the like that cause ink ejection failure when the ink cartridge 22 is mounted. It has been. A filter 94 is similarly provided at the inlet side end of each ink inlet 55 of the upper joint 52.

Then, the ink cartridge 22 is mounted while being guided along the guide portion 54 of the upper joint 52, and the supply portion 66 (see FIGS. 8 and 9) of the ink cartridge 22 and the ink introduction port portion 55 are connected to the seal member 57. After connecting through the ink cartridge 22, the ink supplied from the ink cartridge 22 passes through the filter 94 in the joint unit 47, is then introduced from the ink introduction path 64 in the ink introduction port 55, and passes through the ink passage path 63. Thereafter, the ink is supplied from the ink supply path 65 of the ink supply cylinder portion 58 toward the manifold 71 via the filter 82.

The base plate 46 has a rectangular plate shape made of a metal material, that is, a cold-rolled steel plate (SPCC, linear expansion coefficient 9.5 × 10 −6 / ° C. to 10.9 × 10 −6 / ° C.). As shown in the drawing, an insertion opening 67 for inserting two ink supply pipes 83 to be described later is formed in a rectangular shape at a position facing two ink supply cylinders 58 of the lower joint 53, and an upper portion. A locking hole 68 for locking the claw portion 56 of the joint 52 is formed at a position facing each claw portion 56. The front end of the base plate 46 is formed with a locking projection 48 for being inserted and fixed in a locking hole 44 of a carriage 26, which will be described later. Concave portions 69 for routing the actuator-side flexible wiring board 49 are formed.

The joint unit 47 is elastically attached to the base plate 46 by the claw portions 56 of the upper joint 52 being locked in the locking holes 68 of the base plate 46. In this attachment, since each protrusion 86 of the upper joint 52 is brought into contact with the base plate 46, the base plate 46 receives the pressing force from the ink cartridge 22 in a distributed manner via these protrusions 86. It becomes like this.

As shown in FIGS. 4 and 5, the actuator 70 is interposed between two channel members 72 and two channel members 72 each having a groove that forms a plurality of ejection channels 74 for containing ink. A center plate 73 fixed to one surface of each channel member 72 is provided so as to cover the plurality of grooves.

Each channel member 72 has a rectangular shape and is made of a deformable material such as piezoelectric ceramic. A plurality of grooves for forming the ejection channel 74 are formed in parallel with the ink ejection direction. This groove forms an ejection channel 74 as a recording element between the side surface of the center plate 73 by fixing the channel member 72 and the center plate 73, and an ejection channel formed thereby. 74 are formed in two rows opposite to each other with the center plate 73 interposed therebetween. Each ejection channel 74 has an ink inlet end 76 into which ink is introduced at one end, and a nozzle 75 that ejects ink at the other end. An electrode (not shown) is provided as an ejection energy generating unit for ejecting the liquid as a droplet.

In addition, an actuator-side flexible wiring board 49 for driving each of the injection channels 74 is connected to each of the injection channels 74. That is, as shown in FIG. 6, the actuator-side flexible wiring board 49 is connected to the terminals 91 connected to the electrodes provided in the ejection channels 74, respectively, and the terminals 92 of the actuator-side flexible wiring board 49 are connected to the terminals 91, respectively. In this manner, each row of the injection channels 74 formed as two rows is connected to each other.

The center plate 73 has a rectangular plate shape longer than each channel member 72 and is made of a ceramic material, that is, forsterite (linear expansion coefficient 10.5 × 10 −6 / ° C.). Each channel member 72 is provided on each side surface of the center plate 73 in such a manner that the center plate 73 extends in a convex shape toward the base plate 46 rather than the ink inlet end 76 of the ejection channel 74. At the same time, the upper end surface 90 of the center plate 73 is bonded and fixed to the lower surface of the base plate 46.

As shown in FIGS. 4 and 5, the manifold 71 is disposed above each channel member 72 and on both sides of the projecting center plate 73. The manifold 71 receives ink supplied from the joint unit 47. An introduction part 77 to be introduced and a supply part 78 for distributing and supplying the ink introduced from the introduction part 77 to the ejection channels 74 with respect to the ink inlet end 76 of each ejection channel 74 are provided.

The manifold 71 is provided with holding portions 81 for holding the actuator 70 so as to protrude along the side surfaces of the channel member 72 at both ends in the length direction. Are bonded and fixed, and the space between the supply portion 78 and the upper end surface of the channel member 72 and the space between the supply portion 78 and the side surface of the center plate 73 are sealed with a potting agent. The upper end surface 89 of the supply unit 78 is bonded and fixed to the lower surface of the base plate 46.

In addition, two ink supply pipes 83 for supplying ink from the joint unit 47 to the manifold 71 are provided between the manifold 71 bonded to one surface of the base plate 46 and the joint unit 47 attached to the other surface. Is provided via a base plate 46. That is, the ink supply tube 83 has a cylindrical shape made of an elastic material such as rubber or elastomer, and is bent in a substantially L shape as shown in FIG. The other end is connected to the introduction part 77 of each manifold 71 through the insertion opening 67 of the base plate 46 while being connected to the supply cylinder part 58.

Then, the ink supplied from the ink supply path 65 in each ink supply cylinder part 58 of the joint unit 47 is supplied to the introduction path 79 in the introduction part 77 of each manifold 71 through the ink supply pipe 83. The The ink supplied to the introduction path 79 in the introduction section 77 is supplied while being distributed from the supply path 80 of the supply section 78 communicating with the introduction path 79 to the ink inlet end 76 of each ejection channel 74.

When ink is supplied to the ink inlet end 76 of each ejection channel 74, each ejection channel 74 changes its volume according to the ejection pulse signal from the actuator-side flexible wiring board 49, and supplies the supplied ink. When the volume is reduced, the liquid is ejected as droplets from the nozzle 75. On the other hand, when the volume is increased, the ink is again introduced from the supply path 80 of the manifold 71, and by repeating such an operation, a predetermined print is formed on the paper 23. I am doing so.

In the inkjet head 24, as shown in FIGS. 4 and 5, a head cover 84 that covers the actuator 70 and the manifold 71 is attached to the base plate 46. A cover opening 85 for exposing the nozzle 75 in the actuator 70 is formed in the head cover 84. The actuator 70 and the manifold 71 are formed by the head cover 84 with the nozzle 75 exposed downward. It is covered.

Such an ink jet head 24 is assembled to the carriage 26 as follows. That is, as shown in FIG. 7, the carriage 26 has a box shape, and two substantially rectangular openings are formed in the lower wall 42, and the inkjet head 24 is attached around the opening 41. The first support portion is formed. Locking members 43a and 43b having locking grooves 44 are provided as mounting means at the front end of each opening 41, and plate springs 45a and 45b are mounted as mounting means at positions opposed to the locking members 43a and 43b. It is provided so as to be attached to the rear wall and side wall of the carriage 26.

Then, as shown in FIG. 8, the locking protrusions 48 of the base plate 46 of the inkjet head 24 are inserted into the locking grooves 44 of the carriage 26, and the rear end and side portions of the base plate 46 are attached to the leaf springs 45a and 45b. The ink jet heads 24 are mounted in a positioned state on the carriage 26 by abutting and pressing the base plate 46 against the lower wall 42 and the locking members 43a and 43b by the leaf springs 45a and 45b. . When the inkjet head 24 is attached to the carriage 26, the actuator 70 and the manifold 71 face downward from the carriage 26, and the joint unit 47 detachably mounts the ink cartridge 22 in the carriage 26. Yes.

As shown in FIG. 7, the two openings 41 of the carriage 26 are formed adjacent to each other, and the two inkjet heads 24 are positioned in the openings 41 as shown in FIG. Are mounted next to each other. Further, two ink cartridges 22 are mounted in parallel on each inkjet head 24. As a result, four ink cartridges 22 of cyan, magenta, yellow, and black are divided into two and mounted on each inkjet head 24. Each ink jet head 24 is provided with one joint unit 47, two manifolds 71, and one actuator 70 as described above, and the ink supplied from each ink cartridge 22 is supplied with a joint. In the unit 47, after flowing through the respective independent ink flow paths, each is supplied to each manifold 71, and each manifold 71 is supplied to each ejection channel 74 formed in one actuator 70 in two rows. Each color is jetted independently from the jet channel member 74.

In the vicinity of both side walls of the carriage 26, as shown in FIGS. 7 and 9, an actuator-side flexible wiring board 49 and a carriage-side flexible wiring board 50 as a second wiring board are connected. For this connection, a relay circuit board unit 93 is provided at the free end of the actuator-side flexible wiring board 49.

The actuator-side flexible wiring board 49 connected to each row of the ejection channels 74 in each inkjet head 24 is connected to the unit 93 as follows.

That is, first, in each inkjet head 24, as shown in FIGS. 5 and 6, among the actuator-side flexible wiring boards 49 connected for each row of the ejection channels 74, Actuator-side flexible wiring board 49 connected to a row (that is, a row of ejection channels 74 arranged on the outer side of carriage 26 among rows of two ejection channels 74 facing each other across center plate 73) (In FIG. 2, FIG. 3, FIG. 5, FIG. 6, and FIG. 9, the reference numeral 49 a is also shown. In the following description, the outer flexible wiring board 49 a is used). And is routed to the unit 93 as it is. Is connected to the farther ejection channel 74 (that is, the row of ejection channels 74 arranged on the inner side of the carriage 26 among the rows of two ejection channels 74 facing each other across the center plate 73). The actuator-side flexible wiring board 49 (also indicated by reference numeral 49b in FIGS. 2, 3, 5, 6, and 9 is referred to as the inner flexible wiring board 49b in the following description). As shown in FIG. 3, the upper surface of the base plate 46 and the lower surface of the lower joint 53 are arranged along the width direction of the base plate 46 as shown in FIG. After being sandwiched between them, it is drawn to the same side as the outer flexible wiring board 49a and is shown in FIG. To, in parallel with its outer flexible wiring board 49a, are routed towards the unit 93.

In this way, when the actuator-side flexible wiring board 49 is routed, the outer flexible wiring board 49a and the inner flexible wiring board 49b connected to each column of the ejection channels 74 in one inkjet head 24 are combined together. The ink jet head 24 can be routed toward one side and connected to the unit 93.

Each actuator-side flexible wiring board 49 (including the outer flexible wiring board 49a and the inner flexible wiring board 49b) connected to the respective ink jet heads 24 in this way is connected to the carriage 26 as shown in FIG. Each is routed outward with respect to the central portion and connected to two carriage-side flexible wiring boards 50 respectively along the both side walls of the carriage 26 via units 93. In this way, the actuator-side flexible wiring boards 49 connected to the two inkjet heads 24 arranged adjacent to each other are routed so as to extend to the outside of the two inkjet heads 24, so that the two carriage-side flexible wiring boards 50. When connected to each other, the configuration can be made symmetrical between two adjacent inkjet heads 24, that is, with the central portion of the carriage 26 as an axis. Therefore, in this color inkjet printer 21, common parts are used as wiring parts such as each actuator-side flexible wiring board 49, each relay circuit board unit 93, and each carriage-side flexible wiring board 50, thereby improving production efficiency. In addition, the cost is reduced.

Further, a space, a guide member for guiding the routing required when the inner flexible wiring board 49b is routed around the center of the carriage 26, and the inner flexible wiring board 49b when the cartridge 22 is mounted are protected. There is no need to provide a cover member or the like, and by routing the actuator-side flexible wiring board 49, the number of parts and cost can be reduced, and the apparatus can be downsized.

The relay circuit board unit 93 includes a hard COB substrate 88 on which an IC chip 95 as a drive circuit is mounted on one surface, a heat radiating plate 96 provided on the other surface of the COB substrate 88, and a cover member 102. Yes. The cover member 102 integrally supports the COB substrate 88 and the heat sink 96.

The COB substrate 88 has a substantially rectangular plate shape, and the outer flexible wiring board 49a is connected to one side (upper end), and the inner flexible wiring board 49b is connected to the other side (lower end). Has been. The COB substrate 88 is mounted on its front surface with a substantially rectangular IC chip 95 for selectively driving the plurality of ejection channels 74, and on the back surface thereof, the heat of the IC chip 95 is mounted. A rectangular plate-like heat radiation plate 96 for heat radiation is attached. Further, the COB substrate 88 is provided with a contact 98 for connecting to the contact 97 of the carriage side flexible wiring board 50. As shown in FIG. 1010, one end of the contact 98 is extendedly connected to an IC chip 95 provided on the surface of the COB substrate 88, and the other end is connected to the front end of the COB substrate 88. It extends so as to penetrate the thickness direction and is provided so as to be exposed on the back surface of the COB substrate 88. A cover member 102 is attached to the COB substrate 88. The cover member 102 is formed with an upper strip 103 and a lower strip 104 along the length direction at the upper end and the lower end, respectively, and these are pressed by a sandwiching member 101 described later. Thus, the COB substrate 88 is assembled so as to cover the surface of the COB substrate 88 together with the IC chip 95.

On the other hand, the carriage-side flexible wiring board 50 is supported along the side wall of the carriage 26 as shown in FIG. The flexible wiring board 50 is connected to a control circuit (not shown) provided on the main body side directly or via a relay board. A substantially rectangular pad member 99 made of an elastic material such as rubber is provided between the free end portion of the carriage-side flexible wiring board 50 and the side wall of the carriage 26. As shown in FIG. 10, a plurality of protrusions 100 are provided on the surface of the pad member 99, and the free end portion of the carriage-side flexible wiring board 50 is a plurality of contacts 97 provided at the free end portion. Is supported by the pad member 99 in such a manner that it overlaps with each protrusion 100.

Further, as shown in FIGS. 7 and 9, the contact 97 of the carriage-side flexible wiring board 50 and the contact 98 of the COB substrate 88 are pressed to the both side walls of the carriage 26 in front of each pad member 99. A sandwiching member 101 is provided as a pressing means for connection.

Each sandwiching member 101 includes an upper sandwiching member 105 and a lower sandwiching member 106. The upper clamping member 105 is pivotally supported at the upper end portion of the side wall of the carriage 26 so as to be rotatable in the vertical direction. A clamping groove 107 is formed in the lower surface along the length direction. A spring member 108 for press-contacting the upper strip 103 of the cover member 102 is provided inside the clamping groove 107. Further, the upper clamping member 105 is disposed so as to face the front side portion of the pad member 99 in a state where the upper clamping member 105 is rotated downward (a state indicated by an imaginary line in FIG. 7).

The lower clamping member 106 is provided at the lower end portion of the side wall of the carriage 26 facing the upper clamping member 105 with the pad member 99 interposed therebetween. A ridge 109 for engaging the side strip 104 is provided upright.

Then, when the lower strip 104 is locked to the projection 109, each contact provided at the free end of the carriage-side flexible wiring board 50 supported by the pad member 99 as shown in FIGS. 97, each contact point 98 of the COB substrate 88 is positioned so as to correspond, and the upper clamping member 105 is rotated downward to sandwich the side wall of the carriage 26, the pad member 99 and the cover member 102 by the clamping groove 107, By bringing the spring member 108 into pressure contact with the upper strip 103 of the cover member 102, each contact 97 of the carriage side flexible wiring board 50 and each contact 98 provided on the COB substrate 88 are brought into pressure contact with each other. Each contact 97 and each contact 98 are connected.

By connecting the carriage-side flexible wiring board 50 and the actuator-side flexible wiring board 49, a control signal sent from the control circuit on the main body side via the carriage-side flexible wiring board 50 is transmitted to the IC on the COB substrate 88. The ejection pulse signal for selectively driving each ejection channel 74 by the chip 95 is sent to each channel member 72 via the actuator side flexible wiring board 49, whereby each ejection channel 74 is selected. Driven. More specifically, in the inkjet head 24, one end of the outer flexible wiring board 49a and the inner flexible wiring board 49b is connected to each side of the COB substrate 88, and the other end is formed in two rows. Since the injection channel 74 is connected to each column, the injection channel 74 can be reliably driven for each column.

Thus, if each contact 97 of the carriage side flexible wiring board 50 and each contact 98 provided on the COB substrate 88 are connected by the sandwiching member 101, the contact 97 and each contact 98 are brought into pressure contact with each other. It can be securely connected. On the other hand, in this color inkjet printer 21, the inkjet head 24 is positioned and mounted on the carriage 26 by the locking members 43a and 43b and the leaf springs 45a and 45b provided independently of the sandwiching member 101 in the carriage 26. Therefore, the pressing force by such a sandwiching member 101 does not affect the positioning of the inkjet head 24. For this reason, the ink jet head 24 can be kept accurately and reliably positioned without causing a positional shift due to such a pressing force, and can achieve good print formation.

A relay circuit board unit 93 is provided at the free end of the actuator side flexible wiring board 49, and the IC chip 95 and the actuator side flexible wiring board 49 side are connected to the COB substrate 88 of the relay circuit board unit 93. Since the contact point 98 is provided, the IC chip 95 is easily and reliably supported on the COB substrate 88, and the contact point 98 on the actuator side flexible wiring board 49 side and the contact point 97 on the carriage side flexible wiring board 50 are simplified. Securely connected by configuration.

In the above description, the recording head of the present invention has been described by taking the inkjet head 24 as an example. However, the recording head of the present invention is not limited to the inkjet head. For example, a dot impact type head, thermal transfer, etc. A known recording head such as a head is included.

1 is a perspective view showing an embodiment of a color ink jet printer as an ink jet recording apparatus of the present invention. It is the disassembled perspective view which looked at the inkjet head from the bottom. It is the disassembled perspective view which looked at the inkjet head from the top. It is principal part side sectional drawing of an inkjet head. It is the sectional view on the AA line in FIG. It is a perspective view explaining the connection of a flexible wiring board. It is a principal part sectional perspective view of a carriage. FIG. 8 is a side view in which an ink jet head and an ink cartridge are attached in FIG. 7. It is a front view in FIG. It is the BB sectional view taken on the line in FIG. It is principal part sectional drawing of the conventional inkjet head.

21 Color Inkjet Printer 22 Ink Cartridge 23 Paper 24 Inkjet Head 26 Carriage 41 Opening 44 Locking Groove 45 Leaf Spring 46 Base Plate 49 Actuator Side Flexible Wiring Board 49a Outer Flexible Wiring Board 49b Inner Flexible Wiring Board 50 Main Body Side Flexible Wiring Board 51 COB Substrate 70 Actuator 71 Manifold 74 Injection channel 75 Nozzle 88 Rigid circuit board 93 Relay circuit board 97 Contact point (main body side flexible wiring board) 98 Contact point (actuator side flexible wiring board) 95 IC chip 101 sandwiching member

Claims (2)

First and second actuators each performing a recording operation with a recording element on a recording medium, and a first flexible one end connected to the first actuator for driving the recording element of the first actuator a wiring board, a support member for supporting the second flexible wiring board whose one end to the second actuator is connected to drive the printing elements of said second actuator, said first and second actuator The support member has a box shape having a lower wall that supports the first and second actuators , and a pair of left and right side walls that face each other at both left and right ends of the lower wall,
Further, in order to support the first and second actuators on the lower wall, the first and second actuators are pressed against the lower wall, and the two actuators are positioned and mounted adjacent to each other. With means,
The pair of side walls includes a pair of second wiring boards having contacts connected to contacts provided at the other ends of the first and second flexible wiring boards, and the pair of second wiring boards. A pair of pressing means for pressing and connecting the contacts of the first and second flexible wiring boards to the contacts,
From the first and second actuators supported on the lower wall, the first and second flexible wiring boards are respectively routed at the other end side outward in the direction opposite to the other actuator. Rises along and is connected to the pair of second wiring boards by the pair of pressing means ,
In the pair of pressing means, these pressing forces do not affect the positioning of the first and second actuators by the mounting means, and the first and second contact points of the pair of second wiring boards are not affected. 2. A recording apparatus , wherein the first and second flexible wiring boards are connected to the pair of second wiring boards by pressing contacts of two flexible wiring boards . The mounting means includes biasing means for pressing the first and second actuators from the side of the lower wall,
A direction in which the urging means presses the first and second actuators, and a direction in which the pair of pressing means presses the first and second flexible wiring boards against the pair of second wiring boards. The recording apparatus according to claim 1, wherein are parallel to each other .

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