JPS622730Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a rotary variable resistor, more specifically, a double rotary variable resistor having two sliders that are in sliding contact with two insulating substrates placed opposite each other. Concerning the moderation mechanism of the vessel.

Hereinafter, the present invention will be explained in detail with reference to one embodiment of the present invention shown in FIGS. 1 to 5. In the figure,
Reference numeral 1 denotes a leaf spring made of a thin metal plate, and the leaf spring includes a substantially arc-shaped outer arm 1a and an inner arm 1d, and a slit 1c is formed between the outer arm 1a and the inner arm 1d. ing. The inner arm 1d is curved downward and has a protrusion 1e formed at its tip. Attachment pieces 1b are provided at both ends of the outer arm 1a in the longitudinal direction.

Reference numeral 2 denotes a slider receiver molded from an insulating synthetic resin, and in the center of the upper and lower surfaces 2a and 2b are hollow annular protrusions 2c and 2d that also serve as spacers and support a hollow operating shaft 3, which will be described later. It is provided integrally, and there are two recesses 2 on the surface of the upper (rear stage side) protrusion 2c.
e, 2e are formed. 2g...... is a protrusion provided on the upper and lower surfaces 2a and 2b of the slider receiver 2,
By welding the protrusions, a pair of sliders 6,
6' is fixed to the slider receiver 2. Further, 2f is a stopper projection which comes into contact with a raised protrusion (not shown) of the cover 7 to restrict the rotation of the slider receiver 2. A notch 2h is provided on the opposite side of the stopper protrusion 2f, and this is provided to avoid engagement with the stopper protrusion of the cover.

Reference numeral 3 denotes a hollow operating shaft made of metal, one end of which is provided with an actuating portion 3a for fitting a knob, and the other end of which is provided with an elastic lock split into two by a notch 3b. A section 3c is provided. The locking portion 3c is press-fitted into the hole 2p provided at the center of the slider receiver 2, and the locking portion 3c matches a notch 2n (see FIG. 2B) provided at the edge of the hole 2p. The hollow operating shaft 3 is fitted, and the neck portion 3d formed at the tip of the locking portion 3c is snap-fitted to the protrusion 2q provided on the inner wall of the notch 2n.
and the slider receiver 2 are adapted to rotate together. And the neck 3d of the hollow operation shaft 3
is engaged with a protrusion 2q provided on the inner wall of the notch 2n of the slider receiver 2, so the hollow operating shaft 3 will not fall out of the slider receiver 2 (see FIG. 5). Alternatively, the locking portion 3c and the hole 2 of the slider receiver 2
If the dimensions of p and the notch 2n are appropriately selected, the neck 3d of the locking portion 3c and the notch 2n of the slider receiver 2 can be
Even without the structure of the protrusion 2q provided on the inner wall of the sliding member 2, the elastic force of the locking portion 3c prevents the slider from falling off from the slider receiver 2 (see FIG. 6).

FIG. 4 shows the upper and lower surfaces 2 of the slider receiver 2 mentioned above.
Sliders 6 and 6' are mounted on a and 2b, and the above-mentioned hollow operating shaft 3 is press-fitted into the cover 7.
What is stored inside is shown, and the leaf spring 1
For example, the mounting piece 1b is placed on the insulating substrate 5' at the rear stage.
The cover 7 is fixed by fitting the mounting feet 7a, 7a on both sides of the cover 7. If another variable resistor, switch (both not shown), etc. is to be attached to the outside of the leaf spring 1 side, connect the connection fitting (not shown) to the mounting foot 7a of the leaf spring 1 and the cover 7. It can be fixedly installed between the And a shaft (not shown) for operating the variable resistor, switch, etc. mentioned above.
is supported in the hollow operating shaft 3, and passes through the hole 1f of the inner arm of the leaf spring 1 and the shaft hole (not shown) provided in the connection fitting to connect the other variable resistor or the like. Connected to suites etc.

Further, the two insulating substrates 5, 5' are mounted so as to sandwich the slider receiver 2 by upper and lower mounting legs 7a of the cover 7 (partly not shown).

The inner arm 1d of the leaf spring 1 fixed on the insulating substrate 5' in the latter stage is connected to the hole 5 of the insulating substrate 5'.
protrudes inward from a′, and its tip protrusion 1e comes into elastic contact with the end face of the annular protrusion 2c of the slider receiver 2, and in response to the rotation of the hollow operating shaft 3, the slider receiver 2 In the process of rotating and continuously varying the resistance value, the protrusion 1e engages and disengages from the recess 2e of the protrusion 2c for moderation, thereby transmitting a moderation feel to the operator.

In addition, when the shaft inserted through the hollow operation shaft 3 and passed through the hole 1f of the inner arm of the leaf spring 1 and the shaft hole provided in the connection mounting bracket is operated, other variable resistors connected to the rear and You can adjust switches etc.

In the figure, 4 is a bearing, and 8 and 8' are terminals.

As described above, according to the present invention, a slider is provided with a pair of elastic locking portions 3c provided with a neck portion 3d at one end of the operating shaft 3, and a hole 2p into which the operating shaft 3 is inserted is formed. A ring-shaped protrusion 2c extends from the edge of the hole 2p of the slider receiver 2, and a protrusion 2q that engages with the elastic locking portion 3c is provided on the inner surface of the hole 2p. A notch 2n is provided, and the notch 2n elastically deforms the elastic locking part 3c inward when engaged, and
A slider receiver 2 with sliders 6 and 6' fixed to the lower surface thereof is sandwiched between a pair of insulating substrates 5 and 5' fixed by a cover 7, and a The leaf spring 1 is fixed and the inner arm 1d of the leaf spring 1 is made to protrude from the hole 5a of the insulating substrate 5' at the rear stage, and a protrusion 1e is provided at the tip of the inner arm 1d.
is made to be freely engageable and detachable from the recess 2e provided on the end surface of the protrusion 2c on the rear side of the slider receiver 2, so that the elastic engagement portion presses against the inner surface of the hole of the slider receiver.
This absorbs the backlash caused by the difference in expansion rates between the operating shaft and the slider receiver, and provides a stable operating condition. Therefore, the operating shaft and slider receiver can be fitted and fixed with high accuracy without falling off, without using conventional methods such as caulking. In addition, since the slider receiver can be attached to the operating shaft with high precision, there is no need to adjust the click body to the slider receiver. It can now be integrated and used for multiple purposes, reducing the number of parts and making it more compact.

As described above, according to the present invention, it is possible to provide a moderation mechanism that does not require special adjustment afterwards, so it is possible to provide a rotary variable resistor that is capable of multiple operations and is equipped with a moderation mechanism. . Furthermore, since this invention does not require caulking, it is possible to easily attach the slider receiver to the hollow operation shaft, and therefore, it is possible to easily attach the slider receiver to the hollow operation shaft, and therefore, it is possible to easily attach the slider receiver to the hollow operation shaft. It has high practical value as it can be applied to variable resistors of the same type.

[Brief explanation of the drawing]

The drawings are all related to the present invention, and FIGS. 1 to 4 show one embodiment of the present invention. FIG. 1 is a plan view of a leaf spring, FIG. Figure B is a plan view of the slider receiver, Figure 3 A is a plan view of the operating shaft, Figure 4 is a front view of the operating shaft, Figure 4 is a sectional front view of the assembled state, and Figure 5 is the operating shaft and sliding FIG. 6 is a cross-sectional view of a main part showing another example of the state of engagement with the slider receiver, and FIG. 6 is a diagram showing another embodiment of the present invention, in which A is a front view of the slider receiver and B is a front view of the operating shaft It is a diagram. 1...Plate spring, 1d...Inner arm, 1e...
Protrusion, 1f...hole, 2...slider, 2c...protrusion, 2d...protrusion, 2e...recess, 2n...notch, 2p...hole, 2q...protrusion, 3 ...operation axis,
3c...Elastic locking part, 3d...Neck, 5...Insulating substrate, 5'...Insulating substrate, 5a'...Hole, 6...Slider, 6'...Slider, 7... cover.

Claims (1)

[Scope of utility model registration request] The slider receiver 2 is provided with a pair of elastic locking parts 3c provided with a neck 3d at one end of the operating shaft 3, and a slider receiver 2 in which a hole 2p through which the operating shaft 3 is inserted is formed. An annular protrusion 2c extends from the edge of the hole 2p, and the inner surface of the hole 2p is provided with a notch 2n provided with a protrusion 2q that engages with the elastic locking portion 3c. 2n elastically deforms the elastic locking portion 3c inward when engaged, and slides the slider receiver 2, which has sliders 6 and 6' fixed onto the upper and lower surfaces, respectively, into a pair of sliders fixed by the cover 7. It is held between the insulating substrates 5 and 5', and the plate spring 1 is fixed on the insulating substrate 5' at the rear stage, with the inner arm 1d of the plate spring 1 protruding from the hole 5a' of the insulating substrate 5' at the rear stage. and a protrusion 1e provided at the tip of the inner arm 1d can be freely engaged and detached from a recess 2e provided in the end face of the protrusion 2c on the rear side of the slider receiver 2. Resistor.