JP2007283610A - Inkjet printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet printer which prevents damage to an FFC and reduces manufacturing costs, by preventing the FFC for connecting a carrier and a circuit board together from being lifted from the backside of a carrier frame. <P>SOLUTION: This inkjet printer 1 comprises the carrier frame 11, the circuit board 8, and the FFC 9 which connects the circuit board 8 and the carrier together. A backside of the carrier frame 11 is provided with notched parts 12a and 12b, a strip-shaped fitting part 13 which is extruded to the front side of the carrier frame 11, and a holding piece 15. The FFC 9 is arranged vertically from an end 9a in such a manner as to be held by the holding piece 15, and almost horizontally laid in a folded part 9b. The folded part 9b is sandwiched in a gap 14 between the backside of the fitting part 13 and the front side of the carrier frame 11, so that the FFC 9 can be prevented from being lifted from the backside of the carrier frame 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an inkjet printer that forms an image on recording paper by reciprocating a carrier connected to a circuit board via an FFC (Flat Flexible Cable) in a main scanning direction.

  In general, in an ink jet printer, an image is formed on a recording sheet while a carrier carrying a print head for ejecting ink is reciprocated in a main scanning direction orthogonal to the conveying direction of the recording sheet. For example, the carrier is configured to move along a shaft provided along the main scanning direction inside the housing. In such an ink jet printer, the carrier that reciprocates and the circuit board on which the control circuit is mounted are connected by an FFC (Flat Flexible Cable) for transmitting a control signal from the control circuit to the print head (for example, Patent Document 1). The FFC is laid from the back side to the front side of the carrier frame so as to penetrate through a through portion formed in a predetermined portion near the carrier of the carrier frame. That is, the portion of the FFC from the circuit board to the through portion of the carrier frame is laid along the back surface of the carrier frame, and the portion from the through portion to the carrier is on the front side of the carrier frame by a predetermined amount. It is laid to have slack. The FFC is fixed to the carrier frame by a holding member at the penetrating portion so that the FFC does not float on the back side of the carrier frame and does not play with the amount of slack on the front side. Thereby, it is comprised so that FFC may not be caught and damaged by the other member inside a housing | casing by the movement of a carrier.

  By the way, in such an ink jet printer, the FFC may be lifted from the back surface of the carrier frame even at a position on the back side of the FFC carrier frame away from the portion fixed by the holding member. When the FFC is lifted, the FFC comes into contact with another member such as a recording paper detection lever pivotally supported on the back side of the carrier frame, and the FFC is damaged due to disconnection or the like. It may interfere with the operation of the member. When the FFC is damaged or buffered by another member, there is a problem that the image forming operation cannot be normally performed. In order to prevent this, for example, the FFC has to be fixed by attaching a holding member for pressing the FFC to the back of the carrier frame or using a tape or the like, which increases the component cost and assembly cost. This increases the manufacturing cost of the ink jet printer.

In Patent Document 2, the FFC is held on the carrier in a state of being sandwiched between the cable holding means provided in a part of the carrier and the cable holding means provided in the cable holding means. An ink jet printer is described in which the holding of the FFC is not easily released even when an impact is applied. However, Patent Document 2 describes the structure of the portion attached to the FFC carrier, but does not describe the structure for preventing the FFC carrier frame from lifting from the back surface.
Noto 3069304 gazette Japanese Patent Laid-Open No. 6-199909

  The present invention has been made in view of the above problems, and can be easily laid on the back surface of the carrier frame so that the FFC does not float from the back surface of the carrier frame, and can be prevented from being damaged. An object is to provide an inkjet printer capable of reducing the cost.

  In order to achieve the above object, an invention according to claim 1 is provided with a housing, a recording paper transport mechanism for transporting recording paper in the sub-scanning direction, and a main body in the main scanning direction which is provided inside the housing and is orthogonal to the sub-scanning direction. A metal chassis having a panel-like carrier frame provided, and a shaft fixed to the chassis in front of the carrier frame so that a main scanning direction is a longitudinal direction; A print head for forming an image on a recording paper is mounted, a carrier slidably fitted to the shaft and reciprocated in the main scanning direction, and a driving force is applied to the carrier to reciprocate the carrier in the main scanning direction. A drive mechanism that moves, a circuit board that is mounted above the carrier frame and on which a control circuit that controls the operation of the recording paper transport mechanism and the drive mechanism is mounted; An FFC (Flat Flexible Cable) that connects the carrier and the circuit board so that signals can be transmitted; and a recording paper detection lever pivotally supported by a substantially horizontal axis on the back side of the carrier frame, The recording paper detection lever is arranged so that the upper end is positioned near the circuit board and the lower end is positioned below the carrier frame, and the lower end is an end of the recording paper conveyed by the recording paper conveying mechanism. The carrier frame is provided with a through-hole through which the FFC penetrates, and the FFC is disposed downward from one end connected to the circuit board. A carrier frame is laid on the back side of the carrier frame, passes substantially horizontally between the back side of the carrier frame and the recording paper detection lever, passes through the through hole, and passes through the through hole. In the ink jet printer that is laid on the other end and connected to the carrier at the other end, the carrier frame is laid on a portion of the FFC from the portion connected to the circuit board to the vicinity of the recording paper detection lever. A notch part that is elongated in the substantially horizontal direction so as to penetrate the carrier frame above and below the part, and the notch part are provided so that the carrier frame is integrally connected at both ends in the substantially horizontal direction. A fitting portion pushed out from the back surface to the front surface side of the carrier frame so that the depth dimension is larger than the thickness of the folded portion when the FFC is folded, and the carrier is disposed above the fitting portion. It is formed integrally with the frame, and the FFC is displaced in the direction of lifting from the back of the carrier frame A holding piece for holding both end portions of the FFC laid in the vertical direction, and the notch portion below the fitting portion is arranged with the recording paper detection lever of the fitting portion. The vertical dimension in the vicinity of the end of the inserted side is larger than the vertical dimension of the portion of the fitting portion away from the recording paper detection lever, and larger than the width dimension of the FFC. The FFC is formed so as to be bent in a crank shape when viewed from the back side of the carrier frame, and the FFC is laid in a vertical direction while being held by the holding piece from a portion connected to the circuit board, Folded so as to be laid in a substantially horizontal direction toward the recording paper detection lever at a portion away from the recording paper detection lever of the fitting portion. The part laid out toward the recording paper detection lever is a part where the vertical dimension of the fitting part is small, and the rear surface of the fitting part of the notch part below the fitting part and the front surface of the carrier frame And is laid along the back surface of the carrier frame toward the recording paper detection lever from the wide end in the vertical direction of the fitting portion, The FFC is prevented from floating from the back surface of the carrier frame, and is prevented from coming into contact with the recording paper detection lever.

  According to a second aspect of the present invention, there is provided a casing, a recording paper transport mechanism for transporting recording paper in the sub-scanning direction, and a panel-like structure provided inside the casing and erected in the main scanning direction orthogonal to the sub-scanning direction An image is formed on the recording paper by ejecting ink from nozzles and a metal chassis having a carrier frame, a shaft fixed to the chassis in front of the carrier frame so that the main scanning direction is the longitudinal direction And a carrier that is slidably fitted to the shaft and reciprocates in the main scanning direction, and a driving mechanism that applies a driving force to the carrier to reciprocate the carrier in the main scanning direction. An FF that is arranged inside the housing and on which a control circuit that controls the operation of the recording paper transport mechanism and the drive mechanism is mounted, and the carrier and the circuit board are connected so that signals can be transmitted. (Flat Flexible Cable), and the carrier frame is provided with a through hole through which the FFC passes, and the FFC is laid on the back side of the carrier frame from one end connected to the circuit board. In the ink jet printer which is laid on the front side of the carrier frame through the through-hole and connected to the carrier at the other end, the carrier frame is in the vicinity of the part where the FFC is laid on the back side of the carrier frame. A cutout portion formed so as to penetrate the carrier frame, and the cutout portion is provided so as to be integrally connected to the carrier frame at least at one end, from the back side to the front side of the carrier frame, The fitting portion pushed out so that the depth dimension is at least larger than the thickness dimension of the FFC. And a part of the FFC laid on the back side of the carrier frame is sandwiched between gaps formed in the notch portion between the back surface of the fitting portion and the front surface of the carrier frame. It is laid in the state.

  According to a third aspect of the present invention, in the second aspect of the present invention, the notch portion has at least a dimension in a direction corresponding to a width direction of the FFC of an end portion of the fitting portion on the through hole side. It is formed so that it may become larger than the dimension of the direction corresponding to the width direction of said FFC of other parts, and it may become larger than the width dimension of said FFC.

  According to the first aspect of the present invention, the folded portion of the FFC that is folded in the substantially horizontal direction toward the recording paper detection lever is sandwiched between the gap formed by the back surface of the fitting portion and the front surface of the carrier frame. Therefore, the FFC is prevented from floating from the back surface of the carrier frame. At this time, since the FFC can be laid toward the recording paper detection lever from a portion having a large vertical dimension of the notch portion below the fitting portion, the FFC is more surely along the back surface of the carrier frame. In such a state, it can be laid so as not to be detached from the carrier frame. Further, since the FFC can be laid by holding the portion laid in the vertical direction from the portion connected to the circuit board with the holding piece and sandwiching the folded portion into the gap of the cutout portion, the FFC can be laid on the carrier frame. It is possible to easily perform the work of laying along the back surface of the battery, and to reduce the manufacturing cost. Since the folded portion of the FFC is sandwiched between the gaps, it is possible to lay the FFC in a state where the folded portion that is more easily damaged than other parts is protected from disconnection. Therefore, it is possible to prevent the FFC from coming into contact with the recording paper detection lever and damaging it without using a member for suppressing the floating of the FFC, and the manufacturing cost of the ink jet printer can be reduced.

  According to the invention of claim 2, a part of the portion laid on the back side of the carrier frame is sandwiched between the notches formed by the back surface of the fitting portion and the front surface of the carrier frame. Since it can be laid in a state, it is possible to prevent the FFC from rising without using a member for suppressing the FFC from rising. Further, the FFC laying operation can be easily performed by sandwiching the FFC in the gap of the notch. Accordingly, it is possible to prevent the FFC from being lifted from the back surface of the carrier frame and being damaged, and to reduce the manufacturing cost of the ink jet printer.

  According to invention of Claim 3, the notch part is formed so that the dimension of the direction corresponding to the width direction of FFC of the edge part by the side of the through-hole of an insertion part may become larger than another site | part. Therefore, it is possible to lay the FFC so as to be more surely along the back surface of the carrier frame and not to be detached from the carrier frame. Therefore, it is possible to more reliably prevent the FFC from being lifted from the back surface of the carrier frame, and it is possible to more reliably prevent the FFC from being damaged.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an ink jet printer according to this embodiment. The ink jet printer 1 is orthogonal to the main scanning direction by reciprocating a carrier 2 on which an ink cartridge 3 having a print head 3a for ejecting ink is mounted in the main scanning direction (indicated by an arrow A in the figure). An image is formed (printed) on the recording paper P conveyed in the sub-scanning direction (indicated by an arrow B in the figure). The inkjet printer 1 has a paper feed tray 120 for holding the recording paper P to be printed on the upper rear side of the housing 110, and the printed recording paper is located below the front surface of the housing 110. A paper discharge tray 130 for discharging P is provided.

  As shown in the drawing, a metal chassis 10 having a panel-like carrier frame 11 erected in the main scanning direction is provided inside the casing 110 of the inkjet printer 1. Inside the housing 110, the carrier 2, the ink cartridge 3 mounted on the carrier 2, and the carrier 2 so that the main scanning direction is the longitudinal direction on the back side of the carrier 2 in front of the carrier frame 11. A fixed shaft 4, a recording paper transport mechanism 5 that transports the recording paper P, a driving mechanism 6 that reciprocates the carrier 2 by applying a driving force to the carrier 2, and a carrier frame 11 that is disposed along the main scanning direction. 2, an encoder scale 7 used for detecting the position in the main scanning direction, a circuit board 8 on which a control circuit (not shown) for controlling various operations of the inkjet printer 1 is mounted, a carrier 2, An FFC (Flat Flexible Cable) 9 that connects the circuit board 8 so that signals can be transmitted is provided. The inkjet printer 1 is connected to, for example, an external personal computer (not shown) and the like, and has a function of forming an image on the recording paper P based on data and commands transmitted from the personal computer. is doing.

  The carrier 2 supports the ink cartridge 3 so that it can be inserted and removed. A print head 3 a is provided on the lower surface of the ink cartridge 3, and the ink sealed in the ink cartridge 3 is ejected downward according to a control signal transmitted from the control circuit of the circuit board 8. In the present embodiment, two ink cartridges 3 are mounted on the carrier 2, one filled with black ink and one filled with color inks of, for example, three colors of cyan, magenta, and yellow. That is, the ink jet printer 1 is configured to be able to form a color image on the recording paper P. Note that the print head 3 a may be provided on the carrier 2. Further, the configuration of the ink cartridge 3 mounted on the carrier 2 is not limited to this. For example, black ink and color ink are sealed in one cartridge 3, and color ink is also provided for each color. It may be enclosed separately. The ink jet printer 1 may be configured to have only an ink cartridge 3 in which black ink is sealed in a carrier 2 and form an image such as a gray scale.

  The carrier 2 is slidably fitted to the shaft 4. The carrier 2 is connected to a part of the belt 6a of the drive mechanism 6 as will be described later, and is arranged to be movable in the main scanning direction while being driven by the drive mechanism 6 and sliding on the shaft 4. The carrier 2 is equipped with a photocoupler (not shown), and the photocoupler scans the encoder scale 7 having a predetermined resolution, so that the position of the carrier 2 in the main scanning direction can be detected. It is configured as follows.

  The drive mechanism 6 includes, for example, an annular belt 6a disposed in the main scanning direction on the chassis 10 of the inkjet printer 1, and a DC motor 6b attached to the carrier frame 11 and rotating the belt 6a. Have. A part of the belt 6 a is connected to the rear of the carrier 2. The driving mechanism 6 applies driving force to the carrier 2 by rotating the belt 6a by the DC motor 6b, and reciprocates the carrier 2 in the main scanning direction. The drive mechanism 6 is not limited to this configuration.

  2 and 3 show the back side of the carrier frame 11. FIG. 4 shows a portion of the carrier frame 11 where the FFC 9 is laid. The circuit board 8 is attached to the upper part of the carrier frame 11 substantially horizontally. The control circuit mounted on the circuit board 8 is controlled by software such as a device driver that operates on an external personal computer, for example, and includes a recording paper transport mechanism 5, a drive mechanism 6, a print head 3a, and the like. To control. The control circuit is configured to operate a predetermined function in response to an operation button (not shown) or the like provided on the inkjet printer 1 that can be operated by the user, for example. May be. On the circuit board 8, in addition to the control circuit, a connector 8a to which one end of the FFC 9 is connected, and a switch 8b for detecting the position of the recording paper, as will be described later, are provided. As shown in FIGS. 2 and 3, the end (one end) 9 a of the FFC 9 is connected to the connector 8 a and is laid on the back surface of the carrier frame 11.

  As will be described later, a cable holding member 20 for holding the FFC 9 and a recording paper detection lever 30 provided on the back side of the carrier frame 11 are attached to the carrier frame 11. As shown in the figure, the carrier frame 11 has a through hole 11a formed at substantially the same height as the position where the carrier 2 on the front surface of the carrier frame is provided, and the cable holding member 20 is attached. A shaft support portion 11b for supporting the lever 30 is provided.

  The cable holding member 20 is made of, for example, resin, and is attached to the through hole 11a from the front side of the carrier frame 11. The cable holding member 20 includes an engaging portion 20a that engages with a side edge of the through hole 11a, a guide portion 20b around which the FFC 9 is wound as will be described later, and a portion wound around the guide portion 20b of the FFC 9. A rear stopper portion 20c that presses a portion on the back side of the carrier frame 11 in the vicinity against the back surface of the carrier frame 11, and a portion on the front side of the carrier frame 11 in the vicinity of a portion wound around the guide portion 20b of the FFC 9 And a front surface stopper portion 20d that is pressed against the front surface.

  The recording paper detection lever 30 rotates as shown by an arrow R in FIG. 3 with both ends of the rotation shaft 30a being pivotally supported by the shaft support portion 11b of the carrier frame so that the rotation shaft 30a is substantially horizontal. It is attached movably. The recording paper detection lever 30 has an abutting portion 30b projecting downward from the rotating shaft 30a and an arm portion 30c projecting upward. The arm portion 30 c is formed so that the tip portion 30 d extends to the vicinity of the circuit board 8 and corresponds to the switch 8 b of the circuit board 8. The contact portion 30 b is formed at a position inside the housing 110 so as to contact the end portion of the recording paper P conveyed by the recording paper conveyance mechanism 5. That is, the recording paper detection lever 30 rotates about the rotation shaft 30a when the recording paper P is conveyed and the end of the recording paper P contacts the contact portion 30b, and the switch is detected by the displacement of the leading end 30d. Operate 8b on / off. Thereby, the position of the end portion of the recording paper P conveyed by the recording paper detection lever 30 and the switch 8b can be detected.

  The FFC 9 has an end (one end) 9 a connected to the connector 8 a of the circuit board 8. As shown in FIG. 3, the FFC 9 is laid on the back side of the carrier frame 11 downward from the end portion 9 a. Then, the folded portion 9b having substantially the same height as the through hole 11a is folded so as to be laid in a substantially horizontal direction, and the back surface of the carrier frame 11 and the arm portion 30c of the recording paper detection lever 30 are connected. It is laid down to the through hole 11a through the gap. The FFC 9 is laid from the back side to the front side of the carrier frame 11 through the through hole 11a in a state where it is fixed so as not to be displaced by being wound around the cable holding member 20. The FFC 9 is fixed in a state in which the FFC 9 is wound around the guide portion 20b of the cable holding member 20, and the FFC 9 is pressed against the back and front surfaces of the carrier frame 11 by the back stopper portion 20c and the front stopper portion 20d, respectively. This is performed by attaching the holding member 20 to the through hole 11a. As shown in FIG. 4, the FFC 9 is connected to the back portion of the carrier 2 along a front surface of the carrier frame 11 from a portion fixed by the cable holding member 20 in the vicinity of the through hole 11a. At this time, the length between the portion fixed by the cable holding member 20 of the FFC 9 and the portion connected to the carrier 2 is the same as that when the carrier 2 reciprocates between both ends in the main scanning direction. It is set so long that it does not hinder the movement.

  As described above, the circuit board 8 and the carrier 2 are connected by the FFC 9, and when an image is formed on the recording paper P, the circuit board 8 is connected to the print head 3 a mounted on the carrier 2 via the FFC 9. A control signal is transmitted. That is, in the inkjet printer 1, the recording paper P transported from the paper feed tray 120 to the inside of the housing 110 by the recording paper transport mechanism 5 receives ink from the print head 3a along the main scanning direction according to a control signal. Is ejected to form an image on the recording paper P. The recording paper P is discharged onto the paper discharge tray 130 by the recording paper transport mechanism 5 when an image is formed.

  Here, in this embodiment, the site | part of the vicinity of the folding | returning part 9b of FFC9 is being fixed to the back surface of the carrier frame 11, and it is comprised so that FFC9 may not lift from the back surface of the carrier frame 11. FIG. This will be described below.

  A portion of the carrier frame 11 corresponding to the connector 8a of the circuit board 8 is provided with cutout portions 12a and 12b, a fitting portion 13 formed by providing the cutout portions 12a and 12b, and a fitting portion 13. The holding piece 15 provided integrally with the carrier frame 11 is provided on both the left and right sides below the connector 8a. The cutout portions 12a and 12b, the fitting portion 13, and the holding piece 15 are provided so as to correspond to positions where the FFC 9 of the carrier frame 11 is laid. That is, as shown in the drawing, the notches 12a and 12b are portions of the portion from the portion connected to the circuit board 8 to the vicinity of the arm portion 30c of the recording paper detection lever 30 among the portions where the FFC 9 is laid. It is formed vertically so as to penetrate the carrier frame 11. The notches 12a and 12b are formed to be elongated in a substantially horizontal direction. A notch having a width slightly larger than that of the FFC 9 is formed in the upper portion of the notch 12a. The fitting portion 13 is formed in a band shape integrally connected to the carrier frame 11 at both ends in the substantially horizontal direction by providing the notches 12a and 12b. The fitting portion 13 is pushed out from the back surface to the front surface of the carrier frame 11 so that the depth dimension is larger than the thickness dimension of the folded portion 9 b of the FFC 9. Thus, a gap 14 is formed between the back surface of the fitting portion 13 and the front surface of the carrier frame 11 so that the folded portion 9b can be sandwiched. As shown in the figure, the holding piece 15 is formed integrally with the carrier frame 11 so as to project from the left and right side edges of the notch above the fitting portion 13 toward the left and right center of the notch. That is, the holding piece 15 is configured to be able to hold both side ends of the FFC 9 laid in the vertical direction from the circuit board 8 so that the FFC 9 is not displaced in the direction of lifting from the back surface of the carrier frame 11.

  In the present embodiment, the fitting portion 13 has a vertical direction in the vicinity of the first end portion 13a on which the FFC 9 is laid in a substantially horizontal direction, that is, the end portion on the side where the recording paper detection lever 30 is disposed. Is larger than the width of the FFC 9. As shown in FIG. 2, the notch 12 b below the fitting portion 13 has a vertical dimension in the vicinity of the first end portion 13 a of the fitting portion 13 so that it is separated from the recording paper detection lever of the fitting portion 13. As seen from the back side of the carrier frame 11, it is formed to be bent substantially at right angles to the crank shape so as to be larger than the vertical dimension of the portion. In other words, in the notch 12b, the vertical dimension of the first end 13a of the fitting part 13 is larger than the vertical dimension of the second end 13b opposite to the first end. It is formed as follows.

  As shown in FIG. 3, the FFC 9 extends vertically along the notch above the notch 12 a so as to be held by the holding piece 15 from the end 9 a connected to the connector 8 a of the circuit board 8. It is laid. And the lower part of the folding | returning part 9b is laid in the substantially horizontal direction toward the 1st end part 13a of the fitting part 13 in the state fitted in the clearance gap 14 of the site | part with a small vertical dimension of the fitting part 13. FIG. ing. The FFC 9 is pulled out from the first end 13 along the back surface of the carrier frame 11 toward the recording paper detection lever 30 and laid.

  As described above, in the inkjet printer 1, the folded portion 9 b of the FFC 9 is sandwiched by the gap 14 formed between the back surface of the fitting portion 13 and the front surface of the carrier frame 11, so that the FFC 9 is back of the carrier frame 11. From being lifted off. At this time, since the FFC 9 is laid from the first end portion 13 a of the fitting portion 13 having a large vertical dimension toward the recording paper detection lever 30, the FFC 9 is more reliably attached to the carrier frame 11. It is difficult to come off the carrier frame 11 in a state along the back surface. Furthermore, since the FFC 9 is laid by holding the portion laid in the vertical direction from the end portion 9a connected to the connector 8a by the holding piece 15 and sandwiching the folded portion 9b in the gap 14, the FFC 9 is mounted on the carrier. The work of laying along the back surface of the frame 11 can be easily performed, and the manufacturing cost can be reduced. Since the folded portion 9b of the FFC 9 is sandwiched between the gaps 14, it is possible to lay the FFC 9 while protecting the folded portion 9b that is more easily damaged than other portions of the FFC 9 from being disconnected. Become. Therefore, it is possible to prevent the FFC 9 from coming into contact with other members such as the recording paper detection lever 30 and damaging it without using a member for suppressing the floating of the FFC 9, and the manufacturing cost of the inkjet printer 1 can be reduced. It is.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, the arrangement of the circuit board 8 and the shape of the notches 12a and 12b and the fitting part 13 are not limited to this, and the circuit board 8 is attached to the side of the carrier frame 11, The fitting part 13 and the notch parts 12a and 12b are formed so that the FFC 9 does not have the folded part 9b and is held in the gap 14 as it is, or the holding piece 15 may not be provided. That is, the FFC 9 can be laid in a state where a part of the portion laid on the back side of the carrier frame 11 of the FFC 9 is sandwiched between the gap 14 formed between the back surface of the fitting portion 13 and the front surface of the carrier frame 11. Thus, the FFC 9 is prevented from floating on the back side of the carrier frame 11, and other members on the back side of the carrier frame 11 do not come into contact with the FFC 9, thereby preventing the FFC 9 from being damaged. In addition, the manufacturing cost of the inkjet printer 1 can be reduced.

1 is a side view illustrating an example of an inkjet printer according to an embodiment of the present invention. The perspective view which shows the back side of the carrier frame of a printer same as the above. The perspective view which shows the back side of the carrier frame of a printer same as the above. Sectional drawing in the SS line | wire of FIG. 2 which shows the site | part by which FFC of the carrier frame same as the above was laid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printer 2 Carrier 3a Print head 4 Shaft 5 Recording paper conveyance mechanism 6 Drive mechanism 8 Circuit board 9 FFC (Flat Flexible Cable)
9a End 9b (connected to the circuit board) 9b Folding part 10 Chassis 11 Carrier frame 11a Through hole 12a, 12b Notch part 13 Insertion part 14 Gap 15 Holding piece 30 Recording paper detection lever 110 Housing A Main scanning direction B Sub Scanning direction P Recording paper

Claims (3)

A housing,
A recording paper transport mechanism for transporting the recording paper in the sub-scanning direction;
A metal chassis having a panel-like carrier frame provided in the housing and erected in the main scanning direction orthogonal to the sub-scanning direction, and the main scanning direction being the longitudinal direction in front of the carrier frame A shaft fixed to the chassis;
A print head that ejects ink from nozzles to form an image on the recording paper is mounted, and a carrier that is slidably fitted to the shaft and reciprocated in the main scanning direction;
A driving mechanism for applying a driving force to the carrier to reciprocate the carrier in the main scanning direction;
A circuit board mounted above the carrier frame and mounted with a control circuit for controlling the operation of the recording paper transport mechanism and the drive mechanism;
FFC (Flat Flexible Cable) for connecting the carrier and the circuit board so that signals can be transmitted;
A recording paper detection lever pivotally supported by a substantially horizontal axis on the back side of the carrier frame,
The recording paper detection lever is arranged so that the upper end is located in the vicinity of the circuit board and the lower end is located below the carrier frame, and the lower end is an end of the recording paper conveyed by the recording paper conveyance mechanism. Is configured to rotate by contacting with
The carrier frame is provided with a through-hole through which the FFC passes,
The FFC is laid on the back side of the carrier frame, downward from one end connected to the circuit board, and passes substantially horizontally between the back side of the carrier frame and the recording paper detection lever, In an inkjet printer that penetrates the hole and is laid on the front side of the carrier frame and connected to the carrier at the other end,
The carrier frame is
The FFC is formed in a substantially horizontal direction so as to penetrate the carrier frame above and below the part where the part from the part connected to the circuit board to the vicinity of the recording paper detection lever is laid. A notch,
By providing the cut-out portion, it is integrally connected to the carrier frame at both ends in a substantially horizontal direction, and the depth dimension is larger than the thickness dimension of the folded portion when the FFC is folded from the back to the front of the carrier frame. A fitting portion that is pushed out so as to be large,
A holding piece that is formed integrally with the carrier frame above the fitting portion and holds both end portions of the FFC laid in the vertical direction so that the FFC does not displace in the direction of lifting from the back surface of the carrier frame. And
The cut-out portion below the fitting portion has a vertical dimension in the vicinity of the end portion of the fitting portion on the side where the recording paper detection lever is disposed away from the recording paper detection lever of the fitting portion. It is formed so as to be bent in a crank shape when viewed from the back side of the carrier frame so as to be larger than the vertical dimension of the part and larger than the width dimension of the FFC,
The FFC is
From the portion connected to the circuit board, laid in the vertical direction in a state held by the holding piece,
Folded so as to be laid in a substantially horizontal direction toward the recording paper detection lever at a portion away from the recording paper detection lever of the fitting portion,
The folded portion and the portion laid from the folded portion toward the recording paper detection lever are a portion where the vertical dimension of the fitting portion is small, and the back surface of the fitting portion of the notch portion below the fitting portion. It is sandwiched between gaps formed between the front surface of the carrier frame and laid along the back surface of the carrier frame from the wide end in the vertical direction of the fitting portion toward the recording paper detection lever. And
Thereby, the FFC is prevented from floating from the back surface of the carrier frame, and is prevented from coming into contact with the recording paper detection lever. A housing,
A recording paper transport mechanism for transporting the recording paper in the sub-scanning direction;
A metal chassis having a panel-like carrier frame provided in the housing and erected in the main scanning direction orthogonal to the sub-scanning direction, and the main scanning direction being the longitudinal direction in front of the carrier frame A shaft fixed to the chassis;
A print head that ejects ink from nozzles to form an image on the recording paper is mounted, and a carrier that is slidably fitted to the shaft and reciprocated in the main scanning direction;
A driving mechanism for applying a driving force to the carrier to reciprocate the carrier in the main scanning direction;
A circuit board that is arranged inside the housing and on which a control circuit that controls the operation of the recording paper transport mechanism and the drive mechanism is mounted;
FFC (Flat Flexible Cable) for connecting the carrier and the circuit board so that signals can be transmitted,
The carrier frame is provided with a through-hole through which the FFC passes,
The FFC is laid on the back side of the carrier frame from one end connected to the circuit board, is laid on the front side of the carrier frame through the through hole, and is connected to the carrier at the other end In
The carrier frame is provided at least at one end by providing a notch portion formed so as to penetrate the carrier frame in the vicinity of a portion where the FFC is laid on the back side of the carrier frame. It is integrally connected to the carrier frame, and has a fitting portion that is pushed out from the back side to the front side of the carrier frame so that the depth dimension is at least larger than the thickness dimension of the FFC,
A part of the FFC laid on the back side of the carrier frame is laid in a state of being sandwiched by a gap formed by the back surface of the fitting portion and the front surface of the carrier frame. An ink jet printer characterized by the above.   In the cutout portion, at least the dimension of the end portion on the through hole side of the fitting portion in the direction corresponding to the width direction of the FFC corresponds to the width direction of the FFC in another portion of the fitting portion. The inkjet printer according to claim 2, wherein the inkjet printer is formed so as to be larger than a dimension in a direction and larger than a width dimension of the FFC.

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