JPH0323660Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a connector connection structure, and in particular, it combines the ends of both base films of a membrane switch, which are arranged facing each other at a predetermined distance, into one connector. This relates to the connection structure of the connector when connecting with

[Prior art]

Figures 5 to 9 are explanatory diagrams of the conventional example, Figure 5 is a perspective view showing the arrangement of the electrode part of the upper base film and the electrode part of the lower base film, and Figure 6 is the main part of the connector. 7 is a cross-sectional view showing how the terminal of the connector is held together by the claw piece, and Figures 8 and 9 are cross-sectional views showing how both base films shown in Fig. 5 are fitted with the claw piece of the connector terminal. It is a diagram.

Generally, in a membrane switch, the electrode section 2 on the back surface of the upper base film 1 and the electrode section 4 on the front surface of the lower base film 3 are arranged opposite to each other with a predetermined interval. When the ends of the electrodes 3 are combined into one connector, the electrode portions 2 and 4 of the upper base film 1 and the lower base film 3 are staggered so as not to overlap with each other, as shown in FIG. The electrode section 2 consists of a silver coating 2a and a carbon overcoat 2b as shown in FIG. 8, and the electrode section 4 consists of a silver coating 4a and a carbon overcoat 4b as shown in FIG.

In FIG. 6, 5 generally indicates the connector,
This connector 5 includes an insulating substrate 6 and a plurality of terminals 7 fixedly planted on the insulating substrate 6 at predetermined intervals. The terminal 7 is formed into a fork shape, and a pair of claw pieces 8 and 9 are set on the upper arm 7a, and the claw pieces 8 are provided on both sides of the cut-out portions 10 and 11 at the tips of the lower arm 7b. , 9 are open, and when inserting the base films 1 and 3,
As shown in FIG. 7, the tips of both cut and raised pieces 8 and 9 are bent inward. 14 is the incision part 1
This is a hole provided in the insulating substrate 6 located below the points 0 and 11.

If the upper and lower base films 1 and 3 shown in FIG. 5 are attached to the claw pieces 8 and 9 of the terminal 7 of the connector 5, for example, the structure of the claw pieces 9 at A part in FIG. As shown in FIG. 8, the claw piece 9 breaks through the base films 1 and 3, and the end surface of the electrode part 2 becomes
It comes into contact with the inner peripheral surface of the claw piece 9. Although not shown, the claw pieces 8 also have the same structure. If part B in Fig. 5 is secured using the claw pieces 8 and 9 in exactly the same way, the structure of the engagement using the claw pieces 9 will be as shown in Fig. 9, for example.
The claw pieces 9 break through the base films 1 and 3 so that the end surface of the electrode portion 4 comes into contact with the inner circumferential surface of the claw pieces 9. Although not shown, the claw pieces 8 also have the same structure.

As another conventional example, as shown in FIG. 10, notches 15a and 15b are provided in a part of the upper base film 1 and the lower base film 3, so that the electrode part 4 of the lower base film 3 and the upper part The electrode portion 2 of the base film 1 is also exposed. And as shown in Figure 10,
Connect the lower base films 1 and 3 to the terminal 7 of the connector 5.
For example, when part C in FIG. 10 is fixed with claw pieces 8 and 9, as shown in FIG. It contacts the inner circumferential surface of piece 9. Although not shown, the claw piece 8 also has the same structure.

Next, when portion D in FIG. 10 is held with the claw piece 9, the result will be as shown in FIG. 12, and the electrode portion 4 of the lower film 3 will come into contact with the inner peripheral surface of the claw piece 9. The claw piece 8 also has the same structure.

[Problem that the invention attempts to solve]

According to each of the above-mentioned conventional examples, the claw pieces 8, 9 and the cut-and-raised parts 10, 11 provided on the connector 5 bite into the base films 1, 3, so that each electrode part 2, 4 to each terminal 7 of the corresponding connector 5, but this is not without problems. That is, the first
In the conventional example, the contact area between the end surfaces of the electrode parts 2 and 4 and the inner circumferential surfaces of the claw pieces 8 and 9 is small (see FIGS. 8 and 9), and in the second conventional example,
The electrode part 4 on the lower base film 3 side has a claw piece 8,
Although the electrode portion 2 of the upper base film 1 contacts the inner circumferential surface of the electrode portion 9 over a wide range (see FIG. 12), the end surface of the electrode portion 2 and the claw piece 8, as in the first conventional example, The contact area with the inner circumferential surface of the connector 9 is small (see FIG. 11), and all conventional examples have had the problem that the connection between the electrode portion and the connector is unstable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connector connection structure that eliminates the drawbacks of the conventional example described above and allows stable contact between the electrode portion of the base film and the terminal of the connector.

[Means to solve the problem]

The present invention provides at least one surface edge of the lower base film that faces the electrode portion on the back surface of the upper base film, and at least one of the back surface end portion of the upper base film that opposes the electrode portion on the surface of the lower base film. A dummy electrode is provided at the top.

[Effect]

When the upper and lower base films are attached using the claws of the connector terminal, for example, if a dummy electrode is provided on the lower base film, it will overlap and contact the back electrode of the upper base film. , each end surface of the electrode part of the upper base film and the dummy electrode part contact the claw piece of the terminal of the connector, and when the dummy electrode part is provided on the back surface of the upper base film, the electrode part on the surface of the lower base film The end faces of the electrode part of the lower base film and the dummy electrode part come into contact with the tabs of the terminal of the connector, and in both cases, the contact area is larger by the dummy electrode, compared to the conventional Stabilize contact.

〔Example〕

Figures 1 and 2 are explanatory diagrams of embodiments of the present invention.
Figure 1 is a perspective view showing the arrangement of the electrode part of the upper base film and the electrode part of the lower base film, and Figure 2 shows the state where part E in Figure 1 is attached to the claw piece of the terminal of the connector. FIG. In addition,
Components that are the same as those of the conventional example shown in FIGS. 5 to 12 are given the same reference numerals, and detailed explanations will be omitted.

In Fig. 1, 16 is the lower base film 3.
The dummy electrode part is provided at the end of the surface of the upper base film 1 so as to be able to overlap and contact the electrode part 2 on the back surface of the upper base film 1, and is made of a silver film 16a and a carbon overcoat 16b. Reference numeral 17 denotes a dummy electrode section provided at the end of the back surface of the upper base film 1 so as to be able to overlap and contact the electrode section 4 on the surface of the lower base film 3, and similarly to the dummy electrode section 16, the dummy electrode section 17 is provided with a silver coating. Consists of carbon overcoat. When the upper and lower base films 1 and 3 shown in FIG. 1 are overlapped and crimped with the terminals 7 of the connector 5 shown in FIG. 6,
In section E in FIG. 1, the electrode section 2 of the upper base film 1 and the dummy electrode section 16 of the lower base film 3 are in contact with each other, as shown in FIG. Contact the surrounding surface. Although not shown, the same applies to the other claw piece 8.

Although not shown in FIG. 1, in section F of FIG. 1, the electrode section 4 of the lower base film 3 and the dummy electrode section 17 of the upper base film 1 are in contact with each other, and the end surfaces of each of the claw pieces 8 and 9 are in contact with each other. Contact the inner peripheral surface.

According to the above embodiment, the electrode portion 2 of the upper base film 1 and the dummy electrode portion 16 of the lower base film 3 are in contact with each other, and the end surfaces of each are in contact with the inner circumferential surfaces of the claw pieces 8 and 9. However, since the electrode portion 4 of the lower base film 3 and the dummy electrode portion 17 of the upper base film 1 are in contact with each other, the end faces of each are in contact with the inner peripheral surfaces of the claw pieces 8 and 9 at the same time, compared to the conventional case. The contact between each electrode part 2, 4 and the terminal 7 of the connector 5 is stable.

3 and 4 are explanatory diagrams of other embodiments of the present invention, in which FIG. 3 is a perspective view showing the arrangement of the electrode portion of the upper base film and the electrode portion of the lower base film; The figure is a cross-sectional view of the main part of the H part in Figure 3, which is attached to the tab of the terminal of the connector.
As shown in FIG. 3, a dummy electrode portion 16 is provided only on the lower base film 3, and a cutout portion 18 is provided on the upper base film 1, so that both base films 1,
3 may be polymerized, the electrode portion 4 on the surface of the lower base film 3 may be exposed. In this embodiment, in the case of the H portion in FIG. 3, the electrode portion 4 of the lower base film 3 contacts the inner peripheral surface of the claw pieces 8, 9 over a wide range as shown in FIG. is stable, and if part G in Fig. 3 is attached with claws 8 and 9 of terminal 7 of connector 5,
As shown in FIG. 2, in a state where the electrode portion 2 of the upper base film 1 and the dummy electrode portion 16 on the lower base film 3 are in contact with each other, the end surfaces of each are connected to the claw pieces 8,
9, and the contact is stable.

[Effect of idea]

According to the present invention, a dummy electrode is provided on at least one of the upper and lower base films, and the dummy electrode is in contact with the electrode of the opposing base film, and each end face is connected to a claw piece of a terminal of a connector. Since it comes into contact with the inner peripheral surface of the base film, the contact area between the electrode part of the base film and the terminal of the connector can be increased compared to the conventional method, and a more stable contact condition can be obtained than in the conventional method. It has the effect of being possible.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of the first embodiment of the present invention; FIG. 1 is a perspective view showing the arrangement of the electrode portion of the upper base film and the electrode portion of the lower base film; Figure 2 is a cross-sectional view of the main part of the E part in Figure 1, which is held in place by the tab of the connector terminal.
FIG. 4 is an explanatory diagram of another embodiment of the present invention,
Figure 3 is a perspective view showing the arrangement of the electrode part of the upper base film and the electrode part of the lower base film, and Figure 4 shows the state in which the H section in Figure 3 is attached to the claw piece of the terminal of the connector. Main part sectional view, Figures 5 to 9
The figure is an explanatory diagram of a conventional example. Fig. 5 is a perspective view showing the arrangement of the electrode part of the upper base film and the electrode part of the lower base film. Fig. 6 is a sectional view of the main part of the connector. Fig. 7 8 and 9 are cross-sectional views showing the state in which parts A and B of both base films shown in Fig. 5 are fitted with the claw pieces of the connector terminal. Figure, 1st
Figures 0 to 12 are explanatory diagrams of other conventional examples;
The figure is a perspective view showing the arrangement of the electrode part of the upper base film and the electrode part of the lower base film.
1 is a cross-sectional view of the main part of the C part in FIG. 10, which is held in place by the tab of the terminal of the connector, and FIG. 12 is a cross-sectional view of the main part of the D part of the connector. 1... Upper base film, 2... Electrode part,
2a...Silver film, 2b...Carbon overcoat, 3...Lower base film, 4...Electrode section, 4a...Silver film, 4b...Carbon overcoat, 5...Connector, 7...Terminal, 8,9...
...Claw piece, 10, 11... Cut and edge part, 12, 13...
Insertion holes, 16, 17...dummy electrodes, 18...notches.

Claims (1)

[Scope of utility model registration request] An upper base film with an electrode part on the back side and a lower base film with an electrode part on the front side are stacked with their positions shifted so that the electrode parts do not face each other, and the ends of the base film are In the connector connection structure in which each of the electrode parts and each of the corresponding terminals are electrically connected by fitting the claw pieces provided on the terminals of the connector so as to bite into the electrode parts, the upper base A dummy electrode portion was formed on at least one of the surface end portion of the lower base film facing the electrode portion on the back surface of the film, and the back surface end portion of the upper base film facing the electrode portion on the surface of the lower base film. A connector connection structure characterized by: