JPS60105571A - Carrier cable retaining structure for printing device - Google Patents

Abstract

PURPOSE:To arrange so that a carrier cable may be protected by forming a guide groove, a guide surface and a plurality of protuberances in a monolithic body at one end of a carrier. CONSTITUTION:Carrier cable 26 leading from a connector 23 is curved and one end 26a of the cable is inserted into a guide groove 27. An escape groove 31 is formed opposed to the groove 27, thus enabling the insertion to be achieved easily. After the afore-mentioned process, the cable is introduced into under a protuberance 30 from above a protuberance 29. This procedure prevents the widthwise swing of the cable with the help of a guide surface 28. In addition, a regular loop can be obtained in a curved direction with the guide groove 27 and protuberance 29, 30. Also the cable 26 does not interfere with the other vessel when a carrier 3 moves and as a result, does not generate a local concentrated tension. Thus it is made possible to protect carrier cable and prolong its service life.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a carrier cable holding structure for a printing device.

Technical background of the invention and its problems In a printing device in which a carrier on which a printing mechanism is mounted is moved along a platen, the printing mechanism on the carrier and the IU drive circuit outside the gear rear are connected by a flexible flat carrier cable. are doing. Accordingly, the flexible carrier cable has a large U-shaped trap when the carrier is close to the drive circuit, and is stretched when the carrier is away from the drive circuit. Conventionally, in order to suppress swinging of the carrier cable due to movement of the carrier, a portion of the carrier cable is fixed to the carrier by means such as screwing or adhesive. Therefore, the assembly work is troublesome. Furthermore, there is a risk that stress will be concentrated in the vicinity of the intermediate fixed portion of the carrier cable and the carrier cable will break.

OBJECT OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide a carrier cable holding structure for a printing device that is easy to assemble and can sufficiently protect the carrier cable.

Summary of the Invention This invention integrally forms a guide groove, a guide surface, and a plurality of protrusions on one side of a carrier, bends a carrier cable pulled out from a connector, and bends the carrier cable in a direction perpendicular to the moving direction of the carrier. Convert the carrier cable to one side l# and insert it into the guide groove, further bend the carrier cable guided from the guide groove and change the direction towards the moving direction of the carrier,
Pass the other side edge of the carrier cable between the guide protrusions on the guide surface to prevent the guide groove and guide surface from swinging out in the width direction of the carrier quadruple. The protrusion and the regular loop of the carrier cable can be obtained to prevent damage caused by interference with other equipment, and further,
When the carrier moves, the movement of the carrier cable in the longitudinal direction between the guide groove and the protrusion (kIfF) is prevented, thereby preventing the occurrence of locally concentrated stress on the carrier cable and the carrier cable, thereby improving durability. Furthermore, the intermediate part of the carrier cable can be easily held without using any parts, and furthermore, the carrier cable can be curved in the width direction by the lever that forms the escape groove facing the guide groove. The structure is such that it can be easily passed between the guide groove and the guide surface without any problems.

Examples of the invention An embodiment of the present invention will be described based on the drawings.

A carrier (3) is slidably held on a carrier shaft (2) parallel to the platen (1). A mounting surface (4) for mounting a ribbon cassette (not shown) is formed on the upper surface of this carrier (3), and cassette clamps (5) for mounting the ribbon cassette are formed on both sides of this mounting surface (4). is installed. A ribbon drive shaft (6) is mounted on the mounting surface (4).
) is attached to be rotatable and elastically movable up and down. Further, on the lower surface of the mounting surface (4), a ribbon drive mechanism (8) having a pulley (7) and a plurality of gears transmits rotation of the pulley (7) in one direction to the ribbon drive shaft (6). ) is provided. The wire (9) wound around the pulley (7) is pulled out to both sides and fixed to a pair of left and right frames (not shown). Further, a cover αO that covers the ribbon drive mechanism (8) is attached to the lower surface of the carrier (3).

Furthermore, the mounting surface 0:1 formed on the front part of the carrier (3)
There is a mounting flange Q for all print heads which is the printing mechanism.
2 is mounted, and a positioning pin αO that is fitted into a hole (not shown) formed in the mounting flange 4 is erected on this mounting surface (2). Furthermore, an inverted U-shaped bearing a4 for holding the head clamp αG is formed on both sides of the front portion of the carrier (3). Head clamp 00 has bearing q4
It has a hinge shaft portion αη which is held by the hinge shaft portion αη, a suppressing portion Q8 which presses the mounting flange 02 against the mounting surface (toward), and a protrusion QI which engages with the inside of the top of the bottle Q9. In addition, the carrier (
3) A belt holder Qυ is screwed to the belt holder (to) formed at the center of the front part. This belt holder Qυ is a holding piece (21Q) that fixes the timing belt Q2 for driving the carrier, which is driven on Tanabata, under the belt holder (A).
and the receiving part (21) that supports the hinge shaft part a from below.Next, the connector mounting piece (c) formed on the carrier (3) is fixed to the print head O1l, and the connector (21) A connector (2) connected to a connector (not shown) is attached with screws, and the rear end of a carrier cable (C) reinforced by a reinforcing plate (C) is connected to the bottom surface of this connector (C). Therefore, the front side of the carrier (3) has a vertical guide groove (c) and a guide surface (c) located on the opposite side of the guide groove (c) and extending in the direction of movement of the carrier (3).
C), two projecting pieces f (J-) whose one end is supported by this guide surface (/1. Opposing escape (II# (11)
) are formed in one piece.

The guide surface (c) is located at a slightly higher level than the upper end of the guide plate, and the outer protrusion (2) is located at a slightly higher level than the inner protrusion (-). A guide piece 02 that bends downward is formed at the tip of the projecting piece. Furthermore, as shown in Fig. 6, the carrier cable (
The edges where c) come into contact are chamfered.

In such a configuration, first, the carrier cable <2feTh pulled out from the connector ■ is bent and its one edge (
26 (L) into the guide groove (A), but because the relief groove is formed opposite to the guide groove, the carrier cable (2) is inserted as shown in FIG. Tilt the carrier cable (c) and insert it into the escape groove 0◇ from the direction of the arrow, straighten the carrier cable (c) and insert it into the one side edge (2) as shown in Figure 5.
6 into the guide groove (A). Therefore, even if the carrier cable (c) is not curved in the width direction, the guide groove (a)
can be inserted very easily into the Next, as shown in Fig. 5 (cl), pass the carrier cable (A) from above the protrusion (C) to under the protrusion (G). ) is guided by the guide groove (2) and the guide piece 02, and the other side edge (2u) is guided by the guide surface (C), so that vibration in the width direction is prevented. With @(1), a regular loop is obtained in the bending direction.Therefore, carrier (3)
The carrier cable (c) does not interfere with other equipment when moving, and the carrier cable (a) can move in the longitudinal direction relative to the guide groove (b) and protruding piece c2 (g). There is no locally concentrated stress and the life is long.

Furthermore, the red protruding pieces (on the lining and the guide groove) are chamfered so that there are no edges, which will not damage the carrier cable holder.

Effects of the Invention Since the present invention is configured as described above, it is possible to prevent swinging in the width direction by guiding both side edges of the carrier cable by the guide groove and the guide surface, and also to prevent deflection in the width direction. This allows the carrier cable to be bent with regular loops to prevent interference with surrounding objects, and furthermore allows the carrier cable to move in the longitudinal direction with respect to the guide groove and protruding piece. The cable can be protected and its lifespan can be extended.Furthermore, the middle part of the carrier cable can be easily attached to the carrier without using any mounting parts.Furthermore, by forming an escape groove on the opposite side of the guide groove, This has the advantage that the carrier cable can be inserted into the guide groove extremely easily without being curved in the width direction.

The figure is an exploded perspective view, Figure 3 is a front view, Figure 4 is a partially cutaway perspective view showing the main parts of the carrier, and Figure 5 is a part showing the process of attaching the intermediate part of the carrier cable to the carrier. FIG. 6 is a partial longitudinal sectional front view showing an enlarged view of the state in which the intermediate portion of the carrier cable is attached.

DESCRIPTION OF SYMBOLS 1...Platen, 3...Carrier, 11...Print head (printing mechanism), 23...Connector, 26...
Carrier cable, 27...Guide groove, 28...Guide surface, 29, 30...Protrusion piece, 31...Escape groove Applicant: Tokyo Electric Co., Ltd. Figure 35

Claims (1)

[Claims] 1. A connector is attached to the bottom of a carrier that is equipped with a printing mechanism and moves along the platen, and the rear end of a flexible flat carrier cable whose tip is connected to a drive circuit is connected to the connector. A guide groove for guiding one side edge of the carrier cable to the slider 7f is formed on one side of the carrier so as to intersect with the moving direction of the carrier, and at a level near the upper end of the guide groove, a guide groove is formed for guiding one side edge of the carrier cable to the slide member 7f. A guide surface is formed to guide the other side edge of the carrier cable along the moving direction, and a plurality of protrusions each having one end of a base supported by the guide surface are integrally arranged in parallel on the carrier, and the connector Curve the key Y-shape cable pulled out from the holder, insert one side edge of the carrier cable into the guide groove in a slidable manner, and bend the nil carrier cable led out from the upper end of the guide groove. A carrier cable holding structure for a printing device, characterized in that the carrier cable is passed through between the protrusions by changing direction along the moving direction of the carrier. 2. The carrier cable holding structure for a printing device according to claim 1, wherein the contact edges of the guide groove and the protruding piece with the carrier cable are chamfered. 3. Attach a connector to the bottom of the carrier that is equipped with a printing mechanism and moves along the platen, connect the rear end of a flexible flat carrier cable whose tip is connected to the drive circuit to the connector, and connect one part of the carrier. A guide groove for slidably guiding one side edge of the carrier cable is formed on the side so as to be orthogonal to the moving direction of the carrier, and the carrier cable is formed at a level near the upper end of the guide groove along the moving direction of the carrier. A guide surface for guiding the other side edge is formed, and a plurality of protrusions each having one end of a base supported by the guide surface are integrally arranged in parallel on the carrier, and the carrier cable pulled out from the connector is connected to the carrier cable. The carrier cable is bent and one side edge of the carrier cable is slidably inserted into the guide groove, and the carrier cable led out from the upper end of the guide groove is bent and changed direction along the moving direction of the carrier. a relief r for passing the carrier cable between the protrusions and letting the other side edge of the carrier cable escape to a position facing the guide groove;
A carrier cable holding structure of a printing device characterized by forming a PT.