JPH0455386Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a membrane type output terminal used in keyboard switches, etc., and particularly to a membrane output terminal with a diagonal resist boundary line. It is related to.

[Problems to be solved by conventional techniques and ideas]

As shown in FIG. 4, the shape of the output terminal 1 of the conventional membrane is such that the boundary line 5 between the exposed portion 3 of the conductor 2 at the tip end in the insertion direction and the resist 4 is connected to the conductor 2.
It was formed at right angles to. Therefore, stress is applied to the boundary line portion 5 due to external vibration during insertion into the connector or after assembly, and as shown in FIG.
When the output terminal 1 is folded in half with the reinforcing plate 6 in between and press-fitted into the connector 7, the stress at the time of bending is applied perpendicularly and linearly to the boundary line 5 of the resist 4. Become. As a result, the conductor 2 fatigued prematurely, resulting in defects that caused wire breakage.
Therefore, a technical problem arises that must be solved in order to overcome this deficiency.

[Means for solving problems]

This invention was proposed as a solution to the above-mentioned problems. A linear conductor pattern is provided on a sheet-like resin film, and the upper surface of the conductor pattern is In a membrane in which a resist is formed with an insulating material on the proximal end side except for the distal end side in the insertion direction, the boundary line between the conductor exposed part of the output terminal of the membrane and the resist is attached to the conductor. It is an object of the present invention to provide a membrane output terminal, which is characterized in that it is provided obliquely to the membrane.

[Effect]

In this invention, the boundary line between the exposed conductor of the output terminal of the membrane and the resist is formed obliquely with respect to the conductor, so that the stress at the time of bending is applied to the oblique part of the boundary line. distributed to Therefore, the fatigue of the conductor is reduced, the occurrence of wire breakage is reduced, and the bending resistance is improved.

〔Example〕

An embodiment of this invention will be described below in detail with reference to the attached drawings. For convenience of explanation, the same reference numerals will be used for the components used in the explanation of the conventional type shown in FIG. Figures 1 and 2 are
The output terminal 1 of the membrane is shown. An adhesive layer 9 is formed on a film 8 made of an insulator such as polyester, or the film 8 is roughened to provide two linear conductor patterns on the upper surface, and further, the upper surface of the two conductor patterns is formed. In order to protect this, a resist 4 is formed of an insulator such as polyester or UV ink on the proximal end side except for the distal end side in the insertion direction. The structure of the membrane is conventionally known, but in FIG. Formed in a sawtooth shape in plan view. Note that the shape of this boundary line portion 10 should not be limited to this, and may be, for example, the shapes illustrated in FIGS. 3A to 3C. Therefore, even when the output terminal 1 of the membrane of this embodiment is folded in half as shown in FIG. Therefore, the stress applied to the conductor 2 is reduced.

[Effect of idea]

As explained in detail in the above embodiment, the effect of this invention is that the resist boundary line of the output terminal of the membrane is provided obliquely, which reduces stress when inserted into a connector or when bent when folded in half. is distributed. Therefore, the fatigue of the conductor, which conventionally caused disconnection of the conductor, is reduced, the bending resistance of the output terminal of the membrane is improved, reliability is increased, and the engagement with the connector is ensured. It becomes.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention. 1 is a partially cutaway plan view of the output terminal of the membrane, FIG. 2 is a sectional view taken along line A-A in FIG. 1, FIG. 3 is a partially cutaway plan view showing other embodiments, and FIG. The figure is a partially cutaway plan view showing a conventional type. FIG. 5 is a partially cutaway oblique view when inserting the output terminal of the membrane into the connector. Symbol explanation, 1... Membrane output terminal, 2
...Conductor, 3...Exposed part, 4...Resist,
5, 10...Border line part, 8...Film, 9...
adhesive layer.

Claims (1)

[Scope of utility model registration request] A linear conductor pattern is provided on a sheet-like resin film, and a resist is formed on the upper surface of the conductor pattern and on the proximal end side, excluding the distal end side in the insertion direction, using an insulating material. An output terminal of a membrane, characterized in that a boundary line between an exposed conductor of the output terminal of the membrane and the resist is obliquely provided with respect to the conductor.