JP3522427B2 - Flat cable mounting structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat cable mounting structure for electrically coupling a drive circuit and a driven circuit thereof. 2. Description of the Related Art Many devices used today include an electrical connection between a drive circuit including a power supply circuit board and a control circuit board and a driven circuit (such as a motor drive circuit). As a connecting means, a flat cable formed by integrating a plurality of cables is widely used. In the case where a barrier such as a side plate and a housing that interferes with the wiring of the flat cable is interposed in the middle of the wiring route of the flat cable, a conventional device generally includes a side plate and a housing that obstruct the wiring. In this case, a flat cable is routed by bypassing the barrier or by providing an opening through which the flat cable is inserted into a side plate, a housing, or the like. [0003] However, in the former method of wiring a flat cable by bypassing a barrier such as a side plate or a housing, which is an obstacle to the wiring, a longer flat cable is required. If a moving path for a moving object such as a scanner that moves back and forth and a platen that moves up and down is provided in the wiring path, secondary measures such as preventing interference between this moving object and the flat cable are required. There is a problem that increases the cost of the device. On the other hand, in the latter method, in which an opening for inserting a flat cable is provided in a side plate, a housing, or the like, and the flat cable is wired, the driving circuit and the driven circuit can be connected at the shortest distance. On the other hand, the length of the cable may be short, but foreign matter or dust may enter the driven circuit through the opening, or if the base of the driven circuit is a moving body, the inner edge of the opening may rub against the flat cable. There is a problem that the flat cable is easily detached from the connector or damaged. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for connecting a driving circuit and a driven circuit in a wiring path of a flat cable which electrically connects the driving circuit and the driven circuit.
A flat cable mounting structure in which a barrier such as a side plate and a housing that interferes with the wiring of the flat cable is interposed, and an opening having a size large enough to allow the flat cable to pass through the barrier is provided. An opening cover having a size to close the opening and detachable from the barrier is attached to the opening, so that the flat cable is clamped and fixed between the outer edge of the opening cover and the inner edge of the opening. ,
Of the opening cover that clamps and fixes the flat cable
The outer edge and the inner edge of the opening are made of foam rubber.
The opening cover for the barrier,
With the opening cover attached to the opening
By sliding in the direction
Configuration for engaging and disengaging a part of the edge and a part of the inner edge of the opening
And the sliding direction of the opening cover is
In the direction in which the elastic member is pressed against the flat cable,
The configuration should be the same. In this way, the flat cable is sandwiched and fixed between the outer edge of the opening cover and the inner edge of the opening, so that the shortest flat cable is used so that the barrier and the flat cable are not rubbed. Can be. An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing an example of a platen of a page turning device according to the present invention.
The bookbinding document 100 is composed of a document support table 10 on the left and right sides of the document table 1.
The front cover and the back cover (spin cover) are sandwiched and fixedly supported by the cover pressing plates 108a and 108b on the spreadsheet 1, 102 in a spread state. Left and right document support tables 10
Reference numerals 1 and 102 are vertically movably supported by two sets of link mechanisms (not shown).
The up and down movement of 1, 102 is transmitted to each of seven gears (not shown) via a drive shaft that rotates in synchronization with each link mechanism. As a result, the document support tables 101 and 102
Is converted into a rotation operation of each gear. Here, four gears directly connected to each link mechanism mesh with each other, and between them, three gears as idler gears are arranged so as to form a gear train. As a result, when one of the left and right document supports 101 and 102 moves up and down, the other document support is driven up and down in the opposite direction by the same amount as the movement amount of the one document support. The vertical movement of the document supporting tables 101 and 102 is performed by an external force, for example, an operation of an operator or an operation of a scanning unit (not shown) pressing the bookbinding document 100. An electromagnetic clutch (not shown) is connected to the drive shaft 104 via a gear train. When the electromagnetic clutch is turned on, the drive shaft is fixed through the gear train, whereby the drive shaft and each link mechanism are fixed together with each gear, and the left and right document support tables 101,
Since the document 102 cannot move up and down relatively, the left and right document supports 101 and 102 are held in the posture (vertical movement position) at the time when the electromagnetic clutch is turned on. The above-mentioned platen 1 is supported by a wire pulley mechanism (not shown) disposed inside a housing 300a of the platen unit 300 so as to move up and down. As shown in FIG. 2, a motor 411 for driving the above-described wire pulley mechanism and a motor control board (wire controller) 400 for controlling the driving of the motor 411 are provided. Accordingly, in order to control the driving of the motor 411 of the platen unit 300, as shown in FIG. 2, a motor control board 400 disposed inside the housing 300a of the platen unit 300 and the platen unit 30
It is necessary to electrically connect the central control board 500 on the apparatus main body side, which is provided outside the housing 300a, with the flat cable 600 via the connectors 400a and 500a. [0009] Here, the housing 300a which becomes an obstacle for wiring
As described above, the method of wiring the flat cable 600 bypassing the (barrier) requires a long flat cable and provides a moving path for the original table 1 (moving body) that moves up and down in the wiring path. Therefore, secondary measures are required to prevent the interference between the document table 1 and the flat cable 600, and there is a problem that the cost of the apparatus increases. The flat cable 6 is connected to the housing 300a.
The method of wiring the flat cable 600 by providing the opening 300b for inserting the
Since the (drive circuit) and its motor control board 400 (driven circuit) can be connected with the shortest distance, the length of the flat cable can be shortened, but in the driven circuit (in the housing 300aa) through the opening 300b. Foreign matter or dust enters the flat cable 600 due to friction between the inner edge of the opening 300b and the flat cable 600, and the flat cable 600
There is a problem in that it is easy to come off or break from 0a. Therefore, in the first embodiment of the present invention, FIG.
As shown in FIG. 3, an opening 30 large enough to allow the flat cable 600 to pass through the side surface of the housing 300a serving as a barrier.
0b is provided, and an opening cover 700 having a size to close the opening and being detachable from the housing 300a is attached to the opening 300b, and an outer edge of the opening cover 700 and an inner edge of the opening 300b are joined together. The flat cable 600 is held and fixed. Accordingly, the motor control board 400 provided inside the housing 300a of the document table unit 300 and the central control board 500 on the apparatus main body side provided outside the housing 300a of the document table unit 300 are shortest. The flat cable 60 which can be connected using the flat cable 600 and is inserted through the opening 300b
0 is fixed between the outer edge of the opening cover 700 and the inner edge of the opening 300b.
0b, the flat cable 600 can be wired so as not to be rubbed, and the opening 300b of the housing 300a is covered by the opening cover 700.
Foreign matter and dust are prevented from entering the inside of the housing 300a of the second housing. When the flat cable 600 passing through the opening 300b is directly clamped and fixed between the outer edge of the opening cover 700 and the inner edge of the opening 300b, the outer edge of the opening cover 700 and the inner side of the opening 300b are fixed. There is a possibility that the flat cable 600 may be damaged or disconnected due to the clamping pressure with the edge. Therefore, in the second embodiment of the present invention, as shown in FIG. 3, elastic members such as foam rubber are provided on the outer edge 700a of the opening cover 700 for holding and fixing the flat cable 600 and the inner edge 300c of the opening 300b. As shown in FIG. 4, the cable retainer 800 is disposed on the outer edge of the opening cover 700 and the cable retainer 800 disposed on the inner edge of the opening 300b. The flat cable 600 through which the wire 300b is inserted is elastically pressed and clamped and fixed. By the way, in the above-mentioned devices, in recent years,
In order to facilitate disassembly at the time of recycling after the disposal, it is desired to use as few fasteners as possible, such as screws. Therefore, in the third embodiment of the present invention, the opening cover 700 for the above-described housing 300a is provided.
As shown in FIG. 3 and FIG.
The opening cover 700 is slid in a predetermined direction (here, the vertical direction in FIG. 5) with respect to the opening 300b of FIG.
And a part of the inner edge of the opening 300b. At this time, the sliding direction of the opening cover 700 is
As shown in FIG. 5, the pressing direction of the cable holder 800 is made to match the flat cable 600. According to this flat cable mounting structure, when mounting the opening cover 700 to the opening 300b, first, the state shown in FIG.
The lower outer edge tongue 700b of the opening cover 700 is engaged with the lower inner edge of the opening 300b, and then FIG.
As shown in FIG. 5, after the opening cover 700 is slid in a predetermined direction (downward in FIG. 5) against the elasticity of the cable retainer 800, the pressing of the opening cover 700 is stopped, whereby the elasticity of the cable retainer 800 causes By resilience,
As shown in FIG. 4, since the tongue piece 700b on the outer edge above the opening cover 700 is engaged with the inner edge above the opening 300b, the housing 300 can be used without using a fastening member such as a screw.
The engagement of the opening cover 700 with the opening 300b of FIG. Here, by performing an operation opposite to the operation at the time of attaching the opening cover 700 to the opening 300b,
The opening cover 700 can be easily removed from the opening 300b without using a tool such as a screwdriver. As described above, according to the present invention, the flat cable can be securely clamped and fixed between the opening of the housing and the opening cover, so that the flat cable can be prevented from coming off from the connector. Foreign matter and dust can be prevented from entering the housing. Further, by clamping the flat cable with the cable retainer made of an elastic body, it is possible to prevent damage to the clamping and fixing portion of the flat cable. Furthermore, by engaging and disengaging the opening of the housing and the opening cover using the elasticity of the cable retainer, the number of parts can be reduced, the cost can be reduced, and at the time of assembly and maintenance, and
Workability during waste recycling can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view of a platen unit for bookbinding documents as one embodiment of the present invention. FIG. 2 is a schematic side view showing a first embodiment of a flat cable mounting structure in the document table unit. FIG. 3 is a schematic perspective view showing second and third embodiments of the flat cable mounting structure. FIG. 4 is a schematic sectional view showing a state where an opening cover is attached to an opening of a housing in the second and third embodiments. FIG. 5 is a schematic cross-sectional view showing one process when attaching or detaching an opening cover to or from an opening of a housing in the second and third embodiments. DESCRIPTION OF SYMBOLS 1 Document table 100 Bookbinding documents 101, 102 Document support tables 108a, 108b Cover pressing plate 300 Document table unit 300a Document table unit housing 300b Housing opening 300c Inner edge of opening 400 Motor control board 400a Motor control board connector 411 Motor 500 Central control board 500a Central control board connector 600 Flat cable 700 Opening cover 700a Outer edge 700b of opening cover Tongue piece 800 of opening cover Cable holder

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 7/00

Claims (1)

(57) Claims: A side plate which obstructs the wiring of the flat cable is provided in the middle of the wiring path of the flat cable for electrically coupling between the driving circuit and the driven circuit. A mounting structure for a flat cable in the case where a barrier such as a housing is interposed, wherein an opening large enough to allow the flat cable to be inserted is provided in the barrier, and the barrier has a size to close the opening, and By attaching a detachable opening cover to the opening, the flat cable is clamped and fixed between the outer edge of the opening cover and the inner edge of the opening, and the flat cable is clamped and fixed. of
The outer edge and the inner edge of the opening are made of foam rubber.
Elastic member is provided, and the opening / detaching structure of the opening cover with respect to the barrier is opened and closed.
Slide the above-mentioned opening cover in the predetermined direction with respect to the mouth
By doing so, a part of the outer edge of the opening cover and the opening
In addition to the configuration to disengage part of the inner edge,
Set the sliding direction of the opening cover to the above flat cable.
Characterized in that it matches the pressing direction of the elastic member.
Flat cable mounting structure.