JPH0429524Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a variable resistor with a click mechanism that allows a user to feel a click at a predetermined operating position when operating a rotating body.

[Prior Art] In a conventional variable resistor of this type, a protruding piece such as a spring plate for generating a click feeling is fixed to a rotating body, and the rotating body and the case are brought into a predetermined position by operating the rotating body. When the connection is established, a click feeling is obtained by engaging a protrusion for generating a click feeling with a protrusion engaging portion provided on the case. However, this conventional variable resistor requires a separate protrusion for generating a click feeling, and also requires work to fix this protrusion, so it requires a large number of parts. The drawback was that it required many manufacturing steps and was expensive.

Therefore, as seen in the variable resistor with a click mechanism disclosed in Japanese Utility Model Application No. 50-79941, it has been proposed to provide a protrusion for generating a click sensation integrally with the rotating body.

[Problems to be solved by the invention] However, in the conventional variable resistor with a click mechanism in which a protrusion for generating a click sensation is provided integrally with a rotating body, the protrusion for generating a click sensation provided integrally with the rotating body does not have a protrusion. A recess is provided in the case. The click-feel generating protrusion has a structure that generates a spring force or biasing force that constantly presses the protrusion against the inner wall surface of the case. The biasing force generated by the click sensation generating protrusion acts to press the protrusion against the inner wall surface of the case and at the same time eccentrically eccentricizes the axis of the rotating body. As a result, uneven force is applied to the bearing of the rotating body, resulting in poor operability of the rotating shaft, and if the number of adjustments is increased, the eccentric force causes abnormal wear on the bearing of the rotating body, causing play in the bearing. There are problems that occur. Further, when the protrusion is brought into constant contact with the inner wall surface of the case, there is a problem in that the protrusion becomes worn out as the number of adjustments increases, resulting in a decrease in the click feeling. Furthermore, when the protrusion engages in the recess, the eccentric force that was previously acting on the rotating body disappears or becomes smaller, causing the rotating body to vibrate, which causes the slider to vibrate and generate noise. There was a problem that occurred.

SUMMARY OF THE INVENTION An object of the present invention is to provide a variable resistor with a click mechanism that has excellent operability of the rotating body and can minimize wear on the bearing of the rotating shaft and the protrusion of the click mechanism.

[Means for Solving the Problems] The present invention will be explained using the symbols shown in the drawings. The present invention comprises an insulating substrate 1 having a resistor 2 on its surface, a case 7 attached to the insulating substrate 1, and a rotating body 1 bearing on the case 7 and having a slider fixed thereto.
2, a click mechanism that gives a click feeling when the rotating body 12 rotates to a predetermined position, the click mechanism is formed integrally with the rotating body 12, a protrusion 17 for generating a click feeling, and a projection piece 17 provided on the case 7. The object of the present invention is a variable resistor with a click mechanism, which is provided with a protrusion engaging portion A. In the present invention, the protrusion engaging portion is provided on the wall portion of the case 7 facing the outer peripheral surface of the main body of the rotating body 12, and the protrusion 1 protrudes radially inward.
Consists of 0. Further, the click feeling generating protrusion 17 is
Rotating body 1 from the fixed end integrated with rotating body 12
The recess 17a extends so as to form a gap (a) between the rotor 12 and the main body of the rotor 12, and has a recess 17a at its free end that opens toward the outside in the radial direction of the rotating body 12. The click feeling generating protrusion 17 is activated when the rotating body 12 rotates to a predetermined position.
is deformed within the range of distance a, and the protrusion 1 is formed in the recess 17a.
0 is provided so as to be resiliently engaged.

[Function] In the present invention, a concave portion is provided in the click feeling generating protrusion 17 provided integrally on the rotating body, and the protrusion 1 is provided in the case 7.
0 is provided, and a protrusion 1 for generating a click feeling is provided.
7 is provided so that the protrusion 10 elastically engages with the recess 17a when the rotating body 12 rotates to a predetermined position. There is no need to press it all the time. In other words, the click feeling generating protrusion 17
does not generate a biasing force that constantly presses the recess 17a against the inner surface of the wall of the case. Therefore, wear of the protrusion 10 is reduced, and when the recess 17a and the protrusion 10 are not engaged, no force is applied to the rotating body 12 to eccentrically center its axis.
Abnormal wear of the bearing can be suppressed. Therefore, according to the present invention, the operability of the rotating body 12 can be improved, and the occurrence of wobbling of the rotating body and the decrease in the click feeling can be suppressed.

Further, when the recess 17a and the protrusion 10 are engaged or disengaged, the click feeling generating protrusion 17 is
The recess 17a and the protrusion 10 are deformed within the range of
Large vibrations are not generated in the rotating body 12 when it is engaged with and disengaged from the rotating body 12. Therefore, the generation of noise can be suppressed.

[Embodiments] The present invention will be described in detail below based on embodiments shown in the drawings.

In FIG. 1, reference numeral 1 denotes an insulating substrate made of ceramic or the like, and on the surface of this insulating substrate 1 there is a horseshoe-shaped resistor 2 and terminal electrodes 3 connected to both ends of the resistor 2.
and a center electrode 4 disposed inside the resistor 2 are formed by printing or the like. A rotating body through hole 5 is formed in a portion of the insulating substrate 1 located inside the center electrode 4, and a terminal mounting hole 6 passing through the substrate 1 is formed in a portion where the terminal electrode 3 is formed. ing. Reference numeral 7 denotes a case that covers the surface of the insulating substrate 1 on which the resistor 2 is disposed, and a locking claw 8 that is bent to engage with the peripheral edge of the insulating substrate 1 is provided at the open end of the case 7. It is formed. The case 7 also has a rotating body bearing hole 9 formed therein. A protrusion 10 as a protrusion engagement part A that protrudes inward is formed on a part of the outer peripheral wall of the case 7 using a punch or the like, and a stopper 11 is formed at a diagonal position corresponding to the protrusion 10. ing. Reference numeral 12 denotes a rotating body that is supported by the rotating body bearing hole 9 of the case 7, and a columnar slider holding portion 13 and a columnar slider holding portion 13 are inserted into the rotating body through hole 5 on the part of the rotating body 12 on the side of the insulating substrate 1. A supported rotating shaft portion 14 is provided. The rotating body 12 is also formed with a peripheral wall portion 15 that concentrically surrounds the slider holding portion 13, and a slider storage recess 16 is formed inside the peripheral wall portion 15. Rotating body 12
A protruding piece 17 for generating a click feeling is integrally formed on the. The click feeling generating protrusion 17 is connected to the rotating body 1
The fixed end portion is fixed to the upper part of the peripheral wall portion 15 of No. 2, and extends parallel to the axis of the rotating shaft portion 14 so as to form a gap 〓a between it and the main body of the rotating body 12. At the free end of the click feeling generating protrusion 17,
A recessed portion 17a that opens toward the outside is formed (see FIG. 2). 18 is a known slider formed by punching and bending a metal plate, and this slider 18 contacts the mounting hole 19, the sliding contact 20 that contacts the resistor 2, and the center electrode 4. Contact point 21
The mounting hole 19 is fitted into and held by the slider holding portion 13 of the rotating body 12. Then, when the rotary body 12 rotates to a predetermined position, the protrusion 10 of the case 7 elastically engages the recess 17a of the click sensation generation protrusion 17. The position of the portion 10 is determined, and the click feeling generating protrusion 17 and the protrusion 10 constitute a click mechanism. When the protrusion 10 elastically engages in the recess 17a of the click-feel generating protrusion 17 and when the protrusion 10 separates from the recess 17a, the click-feel generation protrusion 17 moves during the above-mentioned period a. Deforms within the range of. Note that 22 is a terminal that is attached to the terminal attachment hole 6 of the insulating substrate 1 and electrically connected to the terminal electrode 3, and 23 is a mounting foot that is integrally formed with the case 7. In the above embodiment, the rotating body 12 rotates to a predetermined position and the protrusion 10 of the case 7
A click feeling is obtained when the click feeling generating protrusion 17 of the rotating body 12 falls into the recess 17a of the click feeling generating protrusion 17 of No. When the edges of the rotating body 12 come into contact with each other, the rotation of the rotating body 12 is restricted.

The rotating body 12 is preferably made by injection molding of polyacetal resin (trade name: Diyuracon) or polyphenylene oxide resin (trade name: Noryl).

[Effects of the invention] As described above, according to the invention, the protrusion for generating a click sensation provided integrally with the rotating body is provided with a recess, the protrusion is provided on the case, and the protrusion for generating a click sensation is rotated. The protrusion is provided so that it elastically engages with the recess when the body rotates to a predetermined position.
There is no need to constantly press the click feeling protrusion against the inner surface of the wall of the case. Therefore, wear on the protrusion is reduced, and when the concave part and the protrusion are not engaged, no force is applied to the rotating body that would eccentricize its axis, which can suppress the occurrence of abnormal wear on the bearing part. . Therefore, according to the present invention, it is possible to improve the operability of the rotating body, and also to suppress the occurrence of rattling of the rotating body and a decrease in the click feeling.

Furthermore, when the recess and the protrusion engage or disengage, the click-feel generating protrusion deforms within the gap formed between it and the main body of the rotating body. Large vibrations are not generated in the rotating body during engagement and disengagement, and it is possible to suppress generation of noise due to vibration of the vibrator accompanying vibration of the rotating body.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is an explanatory view of the main parts of the embodiment shown in FIG. 1. DESCRIPTION OF SYMBOLS 1...Insulating substrate, 2...Resistor, 7...Case, 10...Protrusion (protrusion engaging part), 12...Rotating body, 17...Protrusion for generating click feeling, 17a...
Concave part, a... between.

Claims (1)

[Claims for Utility Model Registration] An insulating substrate 1 having a resistor 2 on its surface, a case 7 attached to the insulating substrate 1, and a rotating body 12 bearing a bearing on the case 7 and having a slider fixed thereto.
and a click mechanism that provides a click feeling when the rotating body 12 rotates to a predetermined position, the click mechanism is a click mechanism that is integrally formed with the rotating body 12 and provides a click feeling when the rotating body 12 rotates to a predetermined position. a protrusion 17 and a protrusion engaging portion A provided on the case 7, the protrusion engaging portion A being a wall portion of the case 7 that faces the outer circumferential surface of the main body of the rotating body 12. The click feeling generating protrusion 17 includes a protrusion 10 provided on the rotating body 1 and protruding inward in the radial direction.
2 and the main body of the rotary body 12 so as to form a space between the fixed end portion and the main body of the rotary body 12, and a recessed portion that opens toward the outside in the radial direction of the rotary body 12 at its free end; 17a, when the rotating body 12 rotates to a predetermined position, the click feeling generating protrusion 17 is deformed within the range of the distance a, and the protrusion 10 is resiliently repelled by the recess 17a. 1. A variable resistor with a click mechanism, characterized in that said click feeling generating protrusion 17 is provided so as to be engaged with the other.