JPH047982Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a self-propelled carriage mechanism for a printer.

[Conventional technology]

A self-propelled carriage mechanism is generally constructed by stacking a ribbon feed mechanism on a carriage frame and connecting a flexible cable.There is a self-propelling motor on the bottom of the carriage frame, and this motor shaft A pinion is attached to both ends of the printer, and the lower pinion engages with a rack attached to the frame of the printer for self-propelling action, and the upper pinion engages with a gear of the ribbon feed mechanism to feed the ribbon. It's getting old.

In such a structure, the assembly consists of stacking the ribbon feed mechanism on top of the carriage frame, fixing it with screws, and making electrical connections by inserting the plug at the end of the flexible cable into the socket provided on the carriage frame. It's summery.

[Problem that the invention attempts to solve]

According to the above-mentioned conventional technology, when assembling, it is necessary to place the ribbon feed mechanism on the carriage frame, screw it in place, and fix it together by aligning the screw holes with each other and screwing the screws into the screw holes. In the automatic assembly line work, there are tasks such as front-back, left-right alignment, installing screws in screw holes, and rotating the screws to screw in, and these tasks are multiple and the work process is complicated. There is a problem of complicated lines due to the large number of plugs.Furthermore, when inserting a plug into a socket, the position of the socket and the plug must be aligned, and then the insertion operation is performed in the horizontal direction, so this also requires the same work as above. There is a problem where this becomes complicated.

[Means for solving problems]

In order to solve this problem, the present invention provides a printer carriage mechanism in which a flexible cable is attached together with a ribbon feed mechanism on a carriage frame. Fix the board, provide guide holes that penetrate the printed wiring board and the carriage frame at multiple locations including both sides of the exposed wiring portion, and provide guide protrusions corresponding to the guide holes on the lower surface of the ribbon feed mechanism. At the same time, a plurality of elastic locking hooks are formed protruding downward from the rear end of the ribbon feed mechanism, and the printed wiring board is provided on both sides of the wiring exposed portion formed at the end of the flexible cable. A hole corresponding to the guide hole is formed.

[Effect]

In the present invention having such a configuration, the exposed wiring part of the flexible cable is overlapped with the exposed wiring part of the printed wiring board so that the hole of the flexible cable matches the guide hole of the printed wiring board, and the ribbon feed is inserted from above. By pressing down the mechanism while keeping it parallel to the carriage frame and printed wiring board, insert the ribbon feed mechanism guide protrusion into the hole of the flexible cable and the guide hole of the printed wiring board and the carriage frame. At the same time, the hook of the ribbon feed mechanism is locked to the lower surface of the carriage frame to fix the ribbon feed mechanism on the carriage frame, and the ribbon feed mechanism presses the flexible cable to release the flexible cable. The exposed wiring portion is electrically connected and fixed to the exposed wiring portion of the printed wiring board.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is an exploded perspective view, and Fig. 2 is a perspective view of the main parts of the printer. One end of the motor shaft protrudes from the upper surface of the carriage frame 1, and a pinion 2 is attached to that end.A pinion for driving (not shown) is attached to the other end of the motor shaft, and a pinion 2 for driving is attached to the other end of the motor shaft. It faces a provided roller, and is configured to run across a rack 3 on the running path by means of this roller and pinion. A printed wiring board 4 is provided on the upper surface of the carriage frame 1.
A wiring exposed portion 5 is formed on one side. A plurality of guide holes 6 are formed to penetrate through the printed wiring board 4 and the carriage frame 1, and are provided on both sides of the exposed wiring portion 5 of the printed wiring board 4 to face each other. .

Reference numeral 7 denotes a ribbon feed mechanism, which is an integrally molded product made of synthetic resin.A ribbon case 8 containing an ink ribbon and a gear for winding the ink ribbon is detachably attached thereto. The ink ribbon is wound up by the engagement. A guide protrusion 9 is formed protruding from the back surface of the ribbon feed mechanism 7 at a position opposite to the guide hole 6 of the carriage frame 1. Reference numeral 10 denotes a plurality of locking hooks formed on the lower side of the ribbon feed mechanism 7, which have a V-shaped side surface and are adapted to expand slightly outward due to elasticity.

Reference numeral 11 designates a flexible cable, which has an exposed wiring portion 12 formed at its end, and holes 13 through which the guide protrusions 9 pass are formed on both sides of the exposed wiring portion 12.

Reference numeral 14 designates a mat made of soft synthetic resin for evenly pressing the wiring exposed portion 12 of the flexible cable 11, and is locked to the guide protrusion 9 through a locking hole 15.

Next, the assembly operation of the above structure will be explained step by step.

The mat 14 is fitted in advance to the guide protrusion 9 of the ribbon feed mechanism 7 through the locking hole 15.

Then, when the holes 13 of the flexible cable 11 are aligned with the guide holes 6 of the carriage frame 1 and the ribbon feed mechanism 7 is stacked from above, the guide projections 9 are guided and inserted into the respective guide holes 6. At this time, at the same time, the hook 10 expands to the side edge of the carriage frame 1 and locks with the L-shaped end locking part, and the ribbon feed mechanism 7 is attached to the carriage frame 1. They are locked together, and at the same time, the flexible cable 11 is also fixed, and the wiring exposed portions 5 and 12 of the printed wiring board 4 and the flexible cable 11 are overlapped and electrically connected.

[Effect of idea]

As explained above, the present invention overlaps the exposed wiring part of the flexible cable with the exposed wiring part of the printed wiring board so that the hole of the flexible cable matches the guide hole of the printed wiring board, and feeds the ribbon feed from above. By pressing down the mechanism while keeping it parallel to the carriage frame and printed wiring board, insert the ribbon feed mechanism guide protrusion into the hole of the flexible cable and the guide hole of the printed wiring board and the carriage frame. At the same time, the hook of the ribbon feed mechanism is locked to the lower surface of the carriage frame to fix the ribbon feed mechanism on the carriage frame, and the ribbon feed mechanism presses the flexible cable to release the flexible cable. Since the exposed wiring part is electrically connected and fixed to the exposed wiring part of the printed wiring board, wiring connection of the flexible cable to the printed wiring board and assembly of the ribbon feed mechanism on the carriage frame can be done from above. Only vertical movement downwards is required, and it can be used for front-to-back, left-right positioning for tightening screws, inserting plugs, etc.
Since it does not require movements from multiple directions such as screw rotation, it can be assembled with extremely simple movements, which has the effect of shortening the assembly work and assembly time, and also simplifies the assembly line etc. This has the effect of being able to be converted into

In addition, the present invention integrally forms holes, hooks, protrusions, etc. on parts conventionally used in printers, so that assembly can be performed with a minimum number of parts and work man-hours. Therefore, the effect of reducing the product cost can also be obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
FIG. 2 is a perspective view of the main parts when the carriage mechanism of the present invention is attached to a printer. 1... Carriage frame, 4... Printed wiring board, 5... Exposed wiring part, 6... Guide hole, 7...
Ribbon feed mechanism, 9... Guide projection, 1
0...Hook, 11...Flexible cable,
12...Exposed wiring part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a printer carriage mechanism in which a flexible cable is attached together with a ribbon feed mechanism on a carriage frame, a printed wiring board having an exposed wiring portion formed on one side end is fixed to the upper surface of the carriage frame. and providing guide holes passing through the printed wiring board and the carriage frame at multiple locations including both sides of the exposed wiring portion, and providing guide protrusions corresponding to the guide holes on the lower surface of the ribbon feed mechanism, A plurality of elastic locking hooks are formed protruding downward at the rear end of the ribbon feed mechanism, and guide holes of the printed wiring board are formed on both sides of the wiring exposed portion formed at the end of the flexible cable. Form a corresponding hole, overlap the exposed wiring part of the flexible cable with the exposed wiring part of the printed wiring board so that the hole of this flexible cable matches the guide hole of the printed wiring board, and insert the ribbon feed mechanism from above. By pressing down while keeping the carriage frame parallel to the printed wiring board, the guide protrusion is inserted into the hole and the guide hole, and the hook is locked to the lower surface of the carriage frame, The ribbon feed mechanism is fixed on the carriage frame, and the ribbon feed mechanism presses the flexible cable to electrically connect and fix the exposed wiring part to the exposed wiring part of the printed wiring board. Characteristics of the printer's cartridge structure.