JPH054256Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a slide in which a slider that slides on a resistor on an insulating substrate can be slid from the outside using an operating knob. This relates to type variable resistors.

[Prior Art] A sliding type variable resistor according to the prior art includes, for example, a resistor formed on an insulating substrate, a casing mounted on the insulating substrate, and a casing having a longitudinal direction in the direction in which the resistor is formed. A slide member is installed on the insulating substrate inside the housing, a slider is provided on the lower surface of the slide member for slidingly contacting the resistor, and a slider is provided on the lower surface of the slider, and the slit groove of the housing is provided on the upper surface of the slider. A device is known in which an operating knob is provided in a state where it protrudes to the outside. By operating this operation knob from the outside with your fingers, the slide member is moved along the slit groove, and the slider attached to the lower surface of the slide member is slidably displaced on the resistor. I have to. Further, both ends of the slit groove form stopper portions at both operating ends during sliding displacement of the slide member.

[Problems to be solved by the invention] By the way, as described above, if a slide groove is formed in the housing and the operating knob is made to protrude outside the housing through the slide groove, Since the insulating substrate is exposed to the outside, which is aesthetically undesirable, a flexible cover made of rubber or the like is attached to the slide groove, and a cut is made in it in the direction along the slit groove. In some cases, the slide groove is covered. For this reason, the structure of the slide type variable resistor becomes complicated and the number of parts increases, resulting in disadvantages such as troublesome assembly.

The present invention was made in view of the above points, and its purpose is to provide a slide type variable resistor that has a simple structure, does not expose the insulating substrate to the outside, and is aesthetically superior. It is in.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes an insulating substrate provided with a resistor on its surface, a slide member having a slider that comes into sliding contact with the resistor, and the present invention. A sliding type variable resistor comprising a fixed guide member that guides a sliding member, wherein the fixed guide member includes a metal plate with a stopper portion and a mounting portion bent at both ends thereof, and at least both ends of this metal plate are excluded. and a slide part made of synthetic resin adhered to the part, and by fixing the mounting part to the insulating substrate, the fixed guide member is superimposed with a distance from the surface of the insulating substrate, and the slide It is characterized in that the member is slidably fitted into the slide portion of the fixed guide member, and the sliding position of the slide member is regulated by the stopper portion.

[Function] This variable resistor is incorporated into various devices, and by operating the operation knob and sliding the slide member along the fixed guide member,
A slider attached to the slide member slides along the resistor on the insulating substrate, thereby changing the resistance value.

To assemble this sliding type variable resistor, first a predetermined resistor is formed on an insulating substrate, and a terminal portion is connected to the resistor.
On the other hand, by attaching the slide member to the fixed guide member and attaching the fixed guide member to the insulating substrate, assembly can be easily performed. When the fixed guide member is attached, stopper portions for regulating the amount of displacement of the slide member are formed at both longitudinal ends of the fixed guide member. Also, by attaching the slide member in this way,
The above-mentioned fixed guide member covers the top of the insulating board, and therefore, even if the top of the insulating board is not covered with a member such as rubber, this insulating board will not be exposed to the outside, and this can be used in a given actual machine. It has an excellent aesthetic appearance when worn.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

First, in FIG. 1, 1 indicates an insulating substrate,
Resistors 2, 2 are formed on the insulating substrate 1 in the longitudinal direction thereof. Then, each resistor 2
Terminals 3, 3 are connected to both ends of the resistor 2, and each terminal 3 is bent in a direction perpendicular to the resistor 2.

Next, 4 indicates a fixed guide member, and the fixed guide member 4, as shown in FIGS. 2 and 3,
By molding synthetic resin onto a metal plate,
The metal plate is formed to have a protrusion 4a formed in the center and slide parts 4a and 4b formed on both left and right sides of the protrusion 4a, and both ends of the metal plate are bent in the thickness direction. By doing so, the stopper part 4
c, 4c are formed. Attachment portions 5, 5 extend from both ends of the metal plate, and the attachment portions 5 are assembled by being fitted into attachment holes 6 drilled in the insulating substrate 1. , the protrusion 4a is in contact with the insulating substrate 1.

Furthermore, 7 indicates a slide member, and the slide member 7 has a slider receiver 7a provided so as to straddle the fixed guide member 4 in the transverse direction, and an operating knob 8 is connected to the slider receiver 7a. It is set up. Here, the width of the upper surface of the fixed guide member 4 is wider than the width of the operating knob 8. Further, a recess 8a is formed in the operating knob 8 in its longitudinal direction, and a finger can be inserted into the recess 8a to perform a sliding operation. and,
The slider receiver 7a has, as shown in FIG.
A slider 9 that comes into sliding contact with the resistor 2 of the insulating substrate 1 is riveted.

This embodiment is configured as described above, and this variable resistor can be mounted as it is in the casing 10 of various devices without being attached to a special housing, and at this time, the operation knob formed on the casing 10 can be mounted as is. Since the guide groove 10a portion 8 is covered with the fixed guide member 4, the insulating substrate 1 is not exposed to the outside through the guide groove 10a. Then, the slide member 7 is pushed by engaging the recess 8a of the operating knob 8 that protrudes from the casing 10 to the outside.
moves in the longitudinal direction of the fixed guide member 4, thereby allowing the slider 9 to slide along the resistor 2 and change the resistance value. Then, as mentioned above, press the operation knob 8.
By providing a recess 8a in the operation knob 8,
can now be operated with one finger, improving operability.

In this case, the stroke of the sliding displacement of the slider 9 with respect to the resistor 2, that is, the maximum value and minimum value of resistance, is regulated by the slide member 7 coming into contact with the stopper portion 4c of the fixed guide member 4. be able to.

Here, the variable resistor is assembled by integrally assembling the slide member 7 into the fixed guide member 4, forming the mounting portion 5 on the fixed guide member 4 with the resistor 2 on the surface by means such as printing, and This can be accomplished by an extremely simple operation of inserting the terminal 3 into the mounting hole 6 drilled in the insulating substrate 1 to be connected to the resistor 2, and then bending the mounting portion 5. can. Furthermore, since the aforementioned fixed guide member 4 is formed by molding synthetic resin onto a metal plate, the sliding portion 4
It is now possible to easily form the protrusion 4a that is formed to float the metal plate from the insulating substrate 1, and it is also possible to form the stopper part 4c extremely easily just by bending both ends of the metal plate. become able to. Furthermore, this fixed guide member 4 can be colored in a desired color.

In addition, in the above-mentioned embodiment, the case where the protrusion 4a was provided on the fixed guide member 4 was explained, but if the slide member 7 can be held in a floating state from the insulating substrate 1, it is not necessary to provide the protrusion 4a. There isn't. It is also possible to grip and slide the operation knob 8, in which case the recess 8
a can be omitted.

[Effect of idea]

As detailed above, according to the present invention, since the fixed guide member is attached to cover the insulating substrate, it is possible to prevent the insulating substrate from being exposed to the outside without providing a cover such as rubber, and it is aesthetically pleasing. Moreover, it is possible to provide an excellent sliding type variable resistor. In addition, the slide member not only uses the synthetic resin slide portion of the fixed guide member as a sliding surface, but also the fixed guide member is reinforced with a metal plate, which improves the operability of the slide member. It can be done. Furthermore, since highly rigid stopper parts made of bent metal plates are provided at both ends of the fixed guide member, there is no need for a housing with a conventional slit groove, and it can be slid into the casing of various devices. The type variable resistor can be directly mounted, and the number of parts is reduced as a whole, making assembly easier.

[Brief explanation of the drawing]

Fig. 1 is an external view of a sliding type variable resistor showing one embodiment of the present invention, Fig. 2 is a perspective view from the bottom showing a state in which a sliding member is assembled into a fixed guide member, and Fig. 3 is a perspective view of a sliding type variable resistor showing an embodiment of the present invention. It is a sectional view taken along line XX in the figure. 1...Insulating board, 4...Fixed guide member, 4b
...Slide part, 4c...Stopper part, 7...Slide member, 8...Operation knob, 9...Slider.

Claims (1)

[Scope of utility model registration request] A slide type variable resistor comprising an insulating substrate provided with a resistor on its surface, a slide member having a slider that comes into sliding contact with the resistor, and a fixed guide member that guides the slide member, the fixed guide member consists of a metal plate with a stopper part and a mounting part bent at both ends, and a slide part made of synthetic resin attached to at least the parts excluding both ends of the metal plate, and the mounting part is attached to the insulating substrate. By fixing the fixed guide member to the surface of the insulating substrate, the fixed guide member is overlapped with the surface of the insulating substrate, and the sliding member is slidably fitted into the sliding portion of the fixed guide member. A slide type variable resistor characterized in that the sliding position is regulated by the stopper portion.