JPH0635381Y2 - Flexible cable connection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flexible cable connection mechanism.

[Conventional technology]

A conventional flexible cable connecting mechanism will be described below with reference to the drawings.

FIG. 10 is an overall perspective view, and FIG. 11 is a perspective view of main parts.

In the figure, reference numeral 1 denotes an external connection cable, and this external connection cable 1 is constituted by adhering a backing reinforcing material 3 such as a bake to the end portion of the flexible printed cable 2, and the flexible printed cable 2 is provided with a connector 4. It is connected and fixed by soldering with the lining reinforcing material 3 interposed therebetween.

A pair of connectors soldered to a head cable 6 as a device-side connection cable connected to the thermal head 5 is inserted and connected to the connector 4, and a space motor lead 7, a line feed motor lead 8, and The micro switch leads 9 are soldered to the pattern portions 2a, 2b, 2c of the flexible printed cable 2, respectively.

The external connection cable 1 thus constructed is fixed to the frame 10 with screws or the like, and the thermal head 5, the space motor 11, the line feed motor 12, and the micro switch 13, which are the functional parts of the thermal printer, are connected to the external connection cable 1. It is driven by an external driver or the like (not shown) connected.

[Problems to be solved by the invention]

However, in the conventional flexible cable connection mechanism with the above configuration, the leads of the space motor, the line feed motor, and the micro switch are connected by soldering, so the solder must always be removed during maintenance such as parts replacement. However, there has been a problem that the number of working steps increases and the reliability is lowered due to repeated soldering work.

[Means to solve the problem]

In order to solve such a problem, the flexible cable connection mechanism of the present invention has a terminal portion in which terminals are printed by arranging arrangement intervals, and a flexible printed cable having a plurality of locking holes formed in the terminal portion is used. An external connection cable consisting of, and a terminal portion in which the terminals are printed by arranging the arrangement order so as to correspond to the terminals of the external connection cable,
A device-side connection cable composed of a flexible printed cable having locking holes at predetermined positions and an external wall of the frame of the device, which are press-fitted into the locking holes of the external connection cable and the device-side connection cable, respectively. A positioning post for positioning on the frame so that the terminals of the external connection cable and the terminal of the device-side connection cable overlap each other, and this member A mark provided on the outer wall of the frame at intervals larger than the natural length of the frame, and at a constant interval on the outer wall of the frame so as to be located inside the mark so that both ends of the elastic member reach the mark. Is fixed to the outer wall of the frame and is pressed and deformed by the elastic member to be attached to the external connection cable and the device. Characterized by comprising a connection Amblyseius quenching bracket for insulation displacement connection terminals comrades side connecting cable.

[Action]

According to the present invention having the above configuration, when the locking holes of the external connection cable and the device-side connection cable are press-fitted into the positioning posts provided on the frame of the device, the external connection cable and the device-side connection cable are connected to each other. Since they are positioned on the frame and overlap exactly in the order of arrangement of the external connection cables, elastic members are placed at the overlapping parts of this terminal part so that both ends reach the marks on the outer wall of the frame. The elastic member is attached to the receiving seat in a state of being extended, and the elastic member is pressed and deformed by fixing the connecting bracket to the frame from above the elastic member to obtain a uniform tension of the elastic member and utilize the elastic force. It is possible to press-connect the terminals of the external connection cable and the device-side connection cable.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is an overall perspective view of the embodiment of the present invention with a connecting bracket removed, FIG. 2 is an overall perspective view, FIG. 3 is a plan view showing a connection state of each cable, and FIG. FIG. 3 is a plan view showing a state in which each cable is removed, FIG. 5 is a perspective view of an external connection cable and a frame, FIG. 6 is a perspective view showing a mounting state of a head cable, and FIG. 7 is a head cable mounting process. FIG. 8 is an enlarged sectional view showing a mounted state of the head cable, and FIG. 9 is a perspective view showing a mounted state of the contact rubber.

In FIG. 4, reference numeral 14 denotes an external connection cable, which is provided at the end of the flexible printed cable 15 with backing reinforcements 16a and 16b.
The terminal portions 17a, 17b, 17c have their cover lay removed on the front side and are plated with gold.

The terminals 18a of the head cable 18 and the terminals 19 of the line feed motor cable 19 correspond to these terminals 17a and 17b.
a, the terminal portion 20a of the space motor cable 20 and the terminal portion 21a of the micro switch cable 21.The cover lay on the back side of each of these terminal portions is deleted,
Gold or solder plated.

Next, the connection of the cables 18 to 21 to the external connection cable 14 will be described.

As shown in FIG. 5, the external connection cable 14 has positioning posts 23a, which are provided on the outer wall of the frame 22 of the apparatus.
Locking holes 14a and 14b corresponding to 23b are provided and press-fitted and locked.

Reference numeral 14c is a cut, which absorbs the dimensional variation between the locking holes 14a and 14b.

The line feed motor cable 19 has a locking hole 19b, which is inserted and locked in the positioning post 23a of the frame 22, and the space motor cable 20 also has a locking hole 20b, which is locked in the positioning post 23b. It

The line feed motor cable 19 and the space motor cable 20 are stopped from rotation by the receiving seats provided on the outer wall of the frame 22 at regular intervals, the lower surface of 25b and the upper surfaces of the locking projections 28a, 28b, 28c.

The micro switch cable 21 is also provided with a locking hole 21b, and is inserted into the positioning post 22b of the frame 22 with a slight pressure to be positioned.

This micro switch cable 21 is a post on the frame 22
Rotation is stopped by the upper surfaces of 22c and the receiving seat 25b.

As a result, the terminal portions 19a of the respective cables 19, 20, 21 are
20a and 21a face the terminal portion 17b of the external connection cable 14.

The head cable 18 is positioned and stopped from rotation by a method described later, and its terminal portion 18a faces the terminal portion 17a of the external connection cable 14.

FIG. 3 shows a state in which the respective terminal portions face each other.

As shown in FIG. 9, the whole connection is made by temporarily inserting the contact rubber 24 as an elastic member into the receiving seats 25a and 25b of the frame 22 so that the contact rubbers 24 are substantially centered in the facing terminal portions. This state is as shown in FIG.

Next, the square holes 27a, 27b, 27 provided in the connecting bracket 26
Hook c on the locking projections 28a, 28b, 28c of the frame 22, and attach the frame 2 to the nuts in the nut holders 29a, 29b.
When the contact rubber 24 is crushed by a certain amount in the recess 30 of the connecting bracket 26 by tightening and fixing the screw passed through 2, the elastic force of the contact rubber 24
The terminals facing each other conduct.

Therefore, as the material of the contact rubber 24, silicon rubber or the like which is less likely to be plastically deformed is suitable.

In the above structure, since the contact rubber 24 having a relatively low hardness is used, the contact rubber 24 tends to be bent due to its own weight during assembly.

Therefore, the groove width of the receiving seats 25a, 25b of the contact rubber 24 is made smaller than the diameter of the contact rubber 24, and the contact rubber 24 is inserted into the receiving seats 25a, 25b with a slight discount of about 10% of the entire length at the time of assembly to bend the contact rubber 24. It is preferable to prevent it and to make it easy to assemble the connecting bracket 26.

Further, in order to always keep the amount of tension of the contact rubber 24 constant, the outer walls of the frame 22 are provided with marks 31a and 31b extending over the length L as shown in FIG. 1, and the natural length l of the contact rubber 24 is set to l≈L. Set to 0.9 and extend the contact rubber 24 so that both ends reach the marks 31a and 31b, and the contact rubber 24 extended as described above to the receiving seats 25a and 25b located inside the marks 31a and 31b. By attaching the contact rubber 24, a uniform tension can be obtained, and a stable pressure contact force can be always obtained.

Next, the connection structure of the head cable 18 will be described.

As shown in FIG. 6, the head cable 18 having one side fixed to the carriage frame 33 is curved to form a frame as shown in FIG.
Put it inside 22.

A fitting hole 35 is formed in the bent portion 34 of the head cable 18, and the base portion of the fitting hole 35 is fitted into the nut holder 29a of the frame 22 so that the bent portion 34 is indicated by the arrow in FIG. Then, as shown in FIG. 8, the tip end of the fitting hole 35 is hooked on the bottom surface of the U-shaped protrusion 36 of the frame 22 with a slight tension, whereby the head cable 18 is natural at the edge of the frame 22. The curl height h in the state changes to h ′ and is temporarily fixed by its own elastic force.

At this time, the head cable 18 for the minimum length L _H from the lower surface of the nut holder 29a of the frame 22 to the lower surface of the U-shaped protrusion 36
The fitting hole 35 has a length l _H of l _H / L _H ≈1.05, that is, by increasing l _H by about 5% with respect to L _H , an appropriate elastic force in the vertical direction was obtained.

The terminal portion 18a of the head cable 18 is positioned in the left-right and up-down directions by the U-shaped protrusion 36. According to the above-described temporary fixing method using the elastic force in the vertical direction, the U-shaped protrusion of the frame 22 is used. Since the fitting hole 35 of the head cable 18 is fitted into the portion 36, the terminal portion 18a and the terminal portion 1 of the external connection cable 14 are
The center of 7a easily coincides with the positioning accuracy.

Next, the connection structure of the line feed motor cable 19 and the space motor cable 20 will be described.

Since the connection structure of both is basically the same, the case of the space motor cable 20 will be described below.

The arrangement of the motor leads is common, φ as shown in Fig. 4.
1, φ2, φ3, common, φ4 are required. On the other hand, since the inductor type pulse motor is used for the motor, the winding is divided into two stators. The common line will come out from.

In the conventional example shown in Fig. 10, since the wiring to the motor is an independent single wire, there is no problem in the arrangement of the leads in the soldered part, but in the case of a flexible cable, first of all, to facilitate the wiring work for each stator. In addition, it is necessary to divide the wiring section at the end of the flexible cable into a first group of φ4, common and φ2 and a second group of φ3, common and φ1.

Therefore, even if the first group and the second group are interchanged in order to achieve the lead arrangement according to the specifications, the arrangement of the pressure contact side terminals is common, φ1, φ3, φ
2, common, φ4, the common wire of the first group is φ1,
Since it is necessary to jump over φ3 and φ2 and also over φ2 and φ3, it is difficult to realize with a flexible cable that can only perform a two-dimensional pattern arrangement.

Therefore, in the present embodiment, as shown in FIG. 1, the terminal arrangement of the motor pressure contact portion is changed to the terminal portion 20a, through the pattern to be rearranged on the pattern end point on the pressure contact portion side of the motor lead.
20b part is common, common, φ1, φ3, φ2, common, φ4, and the terminal part of the external connection cable 14 facing this
17b array common, common, φ1, φ2, φ3, no terminal,
With no terminals and φ4, the lead arrangement conforming to the specifications is obtained.

[Effect of device]

As described above, according to the present invention, when the locking holes of the external connection cable and the device side connection cable are press-fitted into the positioning posts provided on the frame of the device, the external connection cable and the device side connection cable are connected to each other. Since they are positioned on the frame and exactly overlap in the arrangement order of the external connection cables, an elastic member is placed at the part where these terminal parts overlap and both ends are attached to the receiving seats provided on the outer wall of the frame. Further, by fixing the connecting bracket to the frame from above the elastic member to press and deform the elastic member, the terminals of the external connection cable and the device-side connection cable are pressed and connected by utilizing the elastic force. Eliminates the need for wiring work to organize the terminal arrangement, unlike the conventional soldering structure, and also removes it. , Reassembly also easily possible to perform the decomposition at the time of parts replacement maintenance since the effect of re-assembling work is facilitated is obtained.

Also, the present invention provides marks on the outer wall of the frame at intervals larger than the natural length of the elastic member, and also provides receiving seats on the outer wall of the frame at regular intervals so as to be located inside the marks. Since both ends are extended to reach the marks, they are attached to the receiving seat,
A uniform tension of the elastic member can be obtained, and a stable pressure contact force can be obtained at all times. As a result, the connection state is stable and the connection reliability is improved.

Further, according to the present invention, since the positioning posts for positioning the terminals of the external connection cable and the device-side connection cable on the frame are formed on the frame, it is possible to realize a reliable terminal connection with a small number of parts. Can also be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of the embodiment of the present invention with a connecting bracket removed, FIG. 2 is an overall perspective view, and FIG. 3 is a connection state of each cable. A plan view, FIG. 4 is a plan view in which each cable of FIG. 3 is removed, FIG. 5 is a perspective view of an external connection cable and a frame, FIG. 6 is a perspective view showing a mounted state of a head cable, and FIG. FIG. 8 is a rear view showing a step of attaching the head cable, FIG. 8 is an enlarged sectional view showing an attaching state of the head cable, FIG. 9 is a perspective view showing an attaching state of the contact rubber, and FIG. 10 is an overall perspective view of a conventional example. FIG. 11 and FIG. 11 are perspective views of relevant parts of the conventional example. 14 …… External connection cable 14a, 14b …… Locking hole 17a, 17b, 17c …… Terminal 18 …… Head cable 18a …… Terminal 19 …… Line feed motor cable 19a …… Terminal 19b, 19c …… Locking hole 20 …… Space motor cable 20a …… Terminal 20b …… Locking hole 21 …… Micro switch cable 21a …… Terminal 21b …… Locking hole 22 …… Frame 23a, 23b …… Positioning post 24… … Contact rubber 26 …… Connecting bracket 35 …… Mating hole 36 …… U-shaped protrusion

 ─────────────────────────────────────────────────── ───Continued from the front page (56) References Microfilm (JP, U) of the detailed description and drawings attached to the application for Japanese Patent Application No. 50-147282 (No. 52-59266). ) A microfilm (JP, U) obtained by photographing the contents and drawings attached to the application of Japanese Utility Model Application No. 60-5008 (Japanese Utility Model Application No. 61-121670).

Claims (1)

[Scope of utility model registration request] 1. An external connection cable comprising a flexible printed cable having terminals printed with terminals, and a plurality of locking holes formed in the terminals, and a terminal having the terminals printed, and having a predetermined position. Device-side connection cable consisting of a flexible printed cable with locking holes on the outer side of the frame of the device, and press-fit into the locking holes of the external connection cable and the device-side connection cable, Positioning post for positioning on the frame so that they overlap each other, an elastic member arranged at a portion where the terminal portion of the external connection cable and the terminal portion of the device side connection cable overlap, and a natural length of the elastic member. Marks provided on the outer wall of the frame at larger intervals and fixed intervals on the outer wall of the frame so as to be located inside the mark. And a receiving seat to which the elastic member is attached in a state where both ends of the elastic member are extended so as to reach the marks, and is fixed to the outer wall of the frame. A flexible cable connection mechanism comprising a connecting bracket for pressure-connecting terminals to each other.