JPH041684Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a slide type variable resistor, which has good dustproof and moisture resistance and has a simple structure by making the contact part consisting of a resistor and a conductor into a sealed structure. The purpose of the present invention is to provide a sliding variable resistor.

Hereinafter, embodiments of the present invention will be described based on the drawings. The drawings all show one embodiment of the sliding type variable resistor according to the present invention; FIG. 1 is a front view, FIG. 2 is an exploded perspective view, and FIGS. 3 and 4 are respectively similar to FIG. 1. A-A' cross-sectional view, B-
B' sectional view and FIG. 5 are exploded perspective views of the contact unit portion.

In these figures, reference numeral 1 denotes a hard insulating substrate, and terminals 3 are inserted into a plurality of through holes 2 provided at both ends of the substrate, with connecting portions 3a exposed on the top surface.
has been planted. On the other hand, as shown in FIG. 5, a strip-shaped conductor 5 and a resistor 6 are formed in parallel along the longitudinal direction on a long and thin flexible insulating substrate 4 by a method such as printing. The insulating substrate 4 has an insulating spacer 8 having an elongated through hole 7 interposed therebetween,
A conductor 5 and a resistor 6 are folded in half so that they face each other with a through hole 7 in between. Note that this insulating spacer 8 may be provided on either the conductor 5 side or the resistor 6 side of the substrate 4 by means such as printing. A terminal 9 made of a flexible printed board partially folded in half is also inserted into both ends of the board 4, and conductor patterns 9a and 9b formed on the surface of the terminal 9 correspond to a conductor 5 and a resistor, respectively. 6 is fixed in a conductive state with a conductive adhesive or the like. After sandwiching the spacer 8 and the terminal 9, the flexible insulating substrate 4 has its edges adhered with an adhesive or the like.
A contact portion consisting of a conductor 5 and a resistor 6 is in a sealed state. After the contact unit 10 integrated in this way is placed on the substrate 1,
Terminal 3 with different conductor patterns 9a and 9b
It is fixed to the connecting portion 3a using a conductive adhesive or the like. Reference numeral 11 denotes a frame, which has a notch 1b in the substrate 1.
It is fixed to the substrate 1 by bending the claw 11a that is fitted into the board 1. An operating body 13 is attached to the frame 11 so as to be slidable along a through hole 12 on the upper surface, and the tip of a pusher 15 mounted in a recess 14 on the lower surface of the operating body 13 is attached to the upper surface of the contact unit 10. It is biased by a spring 16. When the operating body 13 is slid, the pusher 15 moves from above the flexible insulating substrate 4 while pressing the conductor 5 toward the resistor 6, and brings the conductor 5 and resistor 6 into contact through the through hole 7. It is configured to do so.

Note that instead of the presser 15 and the spring 16,
A leaf spring or the like having a downward protrusion may also be used.

As described above, the slide type variable resistor according to the present invention includes a contact unit in which the contact portion consisting of a conductor and a resistor is sealed, and the variable resistor is slidable along the conductor and resistor on the flexible insulating substrate of the contact unit. A movable presser is provided, and either the conductor or the resistor is pressed toward the other by the presser, and as a result, the pressed portion of the conductor and resistor are mutually connected through the through hole of the spacer. It is characterized by being configured so as to make contact with each other. According to the present invention, since the contact portion is sealed, it is possible to obtain a slide type variable resistor that is excellent in moisture resistance and dust resistance, and has a simple structure and good productivity.

[Brief explanation of the drawing]

The drawings all show one embodiment of the variable resistor according to the present invention; Fig. 1 is a front view, Fig. 2 is an exploded perspective view, and Figs. 3 and 4 are taken from A-A in Fig. 1, respectively. FIG. 5 is an enlarged side cross-sectional view taken along lines ' and B--B', and FIG. 5 is an exploded perspective view of the contact unit portion. 4... Flexible insulating substrate, 5... Conductor,
6...Resistor, 7...Through hole, 8...Spacer,
10...Contact unit, 15...Press element.

Claims (1)

[Scope of utility model registration request] Two terminals each having a flexible insulating substrate on which a strip-shaped conductor and a strip-shaped resistor are formed in parallel, an insulating spacer having an elongated through hole interposed therebetween, and a pair of conductors connected to the conductor and the resistor, respectively. A contact unit is made by attaching the conductor and resistor to each other at both ends and bending them in half, and then gluing the edges of the substrate so that the conductor and resistor face each other across the through hole of the spacer, thereby sealing the contact area made of the conductor and resistor. At the same time, a presser element is provided that can freely slide on the substrate along the conductor and the resistor, and either the conductor or the resistor is pressed toward the other by the presser, and these A variable resistor characterized in that a conductor and a resistor are configured to contact each other through a through hole.