JPH10334766A - Rotary electric component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide smooth and good feeling rotary operation capable of increasing the diameter of an O-ring, obtaining heavy torque, outputting stable torque, reducing wrinkles produced by friction caused by the pressure contact of a rotating body. SOLUTION: In a rotary electric component, an O-ring 8 made of rubber is fit into a gap 50 formed between a rotating body 4, or the side wall 16b of an operation lug 1 and the side wall 11 of a case 2 so that the desired rotating torque is obtained in the operation lug 1. Thereby, smooth, good feeling rotary operation capable of increasing the diameter of the O-ring, obtaining heavy torque, outputting stable torque, and reducing wrinkles is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric component suitable for use in a video camera or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 14, a rotary electric component such as a variable resistor using an O-ring is provided with a resistor 80 inside an insulating box-shaped case 81 in which a bearing 80 is embedded. A rotating shaft 83, which is mounted and supported by being inserted into a bearing 80, has a slider 8 sliding on a resistor 82.
4 is attached to the slider holder 85. The rear opening 81a of the case 81 is closed by a lid 86, and an O-ring 87 having a circular cross section is press-fitted into a groove 83a provided on the rotating shaft 83, and the O-ring 87 is inserted into the groove 83.
It has a configuration in which the a surface is pressed against the inner surface of the bearing 80.

[0003]

The O-ring 87 used for the conventional rotary electric component is used for waterproofing the inside of the case 81, and is intended to increase the rotational torque of the rotary shaft 83. It is not used. However, the O-ring 87 also plays a role of increasing the rotational torque. However, when the O-ring 87 is press-fitted into the groove 83a of the conventional rotary shaft 83, the diameter of the rotary shaft 83 is small, and if the torque is to be increased. Since a large stress is applied to the O-ring 87, it is difficult to increase the torque and extend the life of the O-ring 87 at the same time. Further, almost the entire circumference of the O-ring 87 is pressed into contact with the groove 83a and the bearing 80, and there is a problem that a slight change in the dimensions of the O-ring 87 or the like causes a variation in torque and a variation. Also, since almost the entire outer circumference of the O-ring 87 is pressed, the O-ring 87
There was no place to escape the deformation, and it was difficult to output a stable torque due to the change in the parts dimensions and the variation in the rotational torque. Further, since the O-ring 87 has a circular cross section, the contact area of the O-ring 87 changes due to dimensional change and variation, so that it was difficult to output a stable torque.

[0004]

As a first means for solving the above-mentioned problems, a case having a bottom wall and a first cylindrical side wall, a rotatable operation knob, and an opposing face of the operation knob are provided. A rotating body rotated with the operation knob and having a bottom wall, a support shaft rotatably supporting the operation knob and the rotating body, a bottom wall of the case,
Or a slider provided on one of the bottom walls of the rotating body,
The bottom wall of the case or the other of the bottom wall of the rotating body includes a conductive pattern that is in sliding contact with the slider, and an O-ring made of a rubber material. The operation knob or the rotating body includes: A predetermined gap is provided to form a cylindrical second side wall facing the case, and the rotating body or the case is provided with a receiving portion located in the gap, and the first side wall and the second The O-link is provided in the gap surrounded between the two side walls and the receiving portion, and the O-ring is elastically contacted with the first and second side walls. Further, as a second solving means, the rotating body is formed with the second side wall and the receiving portion.

[0005] As a third solution, a plurality of projections projecting outside the second side wall are provided. As a fourth solution, the plurality of protrusions are arranged so as to be located at the vertices of an equilateral triangle. As a fifth solution, the height of the gap is set to the value of the O
The configuration was made larger than the height of the ring and provided with the relief of the O-ring in the height direction. As a sixth solution, flat portions are provided on the outermost and innermost circumferences of the O-ring,
The flat portion is connected to the first and second side walls or the first and second side walls.
The side wall and each of the protrusions are configured to be in elastic contact with each other. Further, as a seventh solving means, the projection is engaged with the operation knob.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a rotary electric component of the present invention will be described with reference to FIGS. 1 to 13. FIG. 1 is a perspective view of the rotary electric component of the present invention, and FIG. FIG. 3 is a perspective view showing a state in which a mold electric component is pressed, and FIG.
4 is a sectional view taken along line BB of FIG. 2, FIG. 5 is a sectional view taken along line CC of FIG. 1, FIG. 6 is a plan view of the rotary electric component of the present invention, FIG. FIG. 8 is a rear view of the rotary electric component of the present invention, FIG. 8 is a plan view showing the rotary electric component of the present invention, showing a state in which the operation knob and the rotating body are removed, and FIG. FIG. 10 is a cross-sectional view for explaining the operation of the elastic piece according to the rotary electric component of the present invention, FIG. 11 is an exploded perspective view of the rotary electric component of the present invention, and FIG. FIG. 13 is a cross-sectional view taken along line EE of FIG. 12.

As shown in FIG. 3, a rotary electric component according to the present invention comprises an operation knob 1, a case 2 for rotatably holding the operation knob 1, a control knob 1 and a case 2
A rotating body 4 interposed therebetween and having the conductive pattern 3 integrally formed on the lower surface side, a fixing member 5 for holding the case 2 slidably, these operation knobs 1, the rotating body 4, the case 2, and the fixing member 5 , A return spring 7 formed in a substantially U-shape and applying a restoring force to the case 2, and fitted into a gap 50 between the case 2 and the rotating body 4. And an O-ring 8 for applying the rotational torque.

An insertion hole 9 for inserting the support shaft 6 is provided at the center of the operation knob 1, and a hole 1a is provided at the top of an equilateral triangle centered on the insertion hole 9. As shown in FIG. 1, the rotating body 4 is formed integrally with an outer cylindrical side wall 11 erected on a circular bottom wall 10 and an inner cylindrical body 12 erected on a central portion of the bottom wall 10. Is formed. The outer side wall 11 is provided with three projections 13 which are fitted into the insertion holes 1a of the operation knob 1 and partially protrude outside the side wall 11, respectively. It is arranged to be located on the top. The rotating body 4 is provided with a circular receiving portion 14 for supporting the O-ring 8 extending from the bottom wall 10 and protruding outward, and the inner cylindrical body 12 has a supporting shaft 6. Is provided with an insertion hole 15 for inserting the same.

As shown in FIG. 8, a bottom wall 16a, a cylindrical side wall 16b, and a connecting portion 17 crossing the center of the side wall 16b are integrally formed in the case 2. In the center of the connecting portion 17, an insertion hole 1 for inserting the support shaft 6 is provided.
8 are provided, and the sliders 19a to 19d are directed downward from the connecting portion 17 toward the front in the sliding direction (downward in FIG. 8).
The sliders 20a to 20d project upward from the connecting portion 17 toward the rear in the sliding direction (upward in FIG. 8). Such a case 2 is formed by integrally molding a single conductive metal plate 22 and a resin 23, and then cutting the constricted portion 22 a of the metal plate 22 so that the sliders 19 d and 20 d closer to the center are formed. To side A phase slider 19
a, 20a, and other sliders 19c,
It is manufactured by cutting off the side B phase sliders 19b and 20b from the side 20c. Further, a projection 24 that contacts the return spring 7 is provided in front of the side wall 16b in the sliding direction.

Further, as shown in FIG.
The fixed contacts 25a, 25b, 25c formed along the sliding direction of the case 2 and the switch pattern 2
5d and external terminals 26a to 26d electrically connected to the fixed contacts 25a to 25c and the switch pattern 25d, respectively, are integrally formed. The fixed contact 25c is for common use, and the other fixed contacts 25a, 25
b is for A phase and B phase, respectively. Further, as shown in FIGS. 3 to 5, a long hole 5a for inserting the support shaft 6 is provided at a central portion of the fixing member 5, and as shown in FIG. An elliptical concave portion 27 is provided for receiving the flange 6a at the lower end of the groove. As shown in FIGS. 3 and 4, a tapered surface 27a that is inclined upward toward the end is formed on the near side (rear part in the sliding direction) of the concave part 27, and is located on the depth side (front in the sliding direction). ) Is formed in a planar shape.

Further, as shown in FIG.
A pair of walls 28, 29 for guiding the case 2 in the sliding direction are provided upright on both sides of the upper surface. An overhanging portion 30 protrudes inward from an upper portion of one wall portion 28, and FIG.
As shown in the figure, a receiving portion 31 capable of receiving the protrusion 2a of the case 2 and a guide portion 32 for guiding the free end 7a of the return spring 7 are formed below the overhang portion 30, and these receiving portions 31 and The guide portion 32 is partitioned by a partition wall 33. The receiving portion 31 is a rear surface in the sliding direction,
The guide portion 32 is a space having an open inner side surface and a bottom surface.
As shown in FIG. 1, the projecting portion 34 also projects inward from the upper portion of the other wall portion 29, and a receiving portion 35 that can receive the projecting portion 2 b of the case 2 below the projecting portion 34 and a return spring 7. A storage section 36 for storing the bent section 7b is provided. The overhanging portions 30 and 34 and the receiving portions 31 and 35 constitute a regulating unit that regulates the vertical movement of the case 2.

Further, slits 37 and 38 are provided in the vicinity of the guide portion 32 of the fixing member 5 in parallel with each other along the direction of movement of the free end 7a of the return spring 7 (vertical direction in FIG. 1). A thin plate-like elastic piece 39 is formed between the slits 37 and 38. This elastic piece 39 has a cantilever shape,
The elastic piece 39 protrudes toward the wall 5b located forward in the sliding direction, and the tip of the elastic piece 39 is separated from the wall 5b by a predetermined distance. Further, the elastic piece 39 is provided with a projection engaging and disengaging with the free end 7a of the return spring 7, for example, a triangular prism-shaped cam ridge 4
0, the cam ridge 40 is formed integrally on the elastic piece 39 along the axial direction of the free end 7a. As shown in FIG. 9, the free end 7a of the return spring 7 is sandwiched between the projecting portion 30 and the elastic piece 39, and the free end 7a of the return spring 7 is shifted from the state shown in FIG. When moving to the state shown in c), it is guided along the overhang portion 30. At this time, as shown in FIG. 10B, when the free end 7a of the return spring 7 passes over the top of the cam ridge 40, the cam ridge 40 is pressed, so that the elastic piece 39 is elastically deformed in the thickness direction. To create a click feeling.

As shown in FIG. 1, the return spring 7 is mounted on the fixed member 5 with the free end 7a inserted into the guide portion 32 and the bent portion 7b inserted into the storage portion 36. When the projection 24 of the case 2 contacts the return spring 7, a return force is applied to the case 2. The O-ring 8 is formed of a rubber material, and has a polygonal cross section as shown in FIGS.
At least the outermost surface and the innermost surface have flat portions 8a,
8b. The O-ring 8 is connected to the side wall 1 of the case 2 as shown in FIGS.
6b, the outer circumference of the side wall 11 of the rotating body 4, and the rotating body 4
Is inserted into a gap 50 formed between the receiving portion 14 and the operation knob 1. When the O-ring 8 is attached to the gap 50, the outermost flat portion 8 a elastically contacts the side wall 16 b of the case 2, and the innermost flat portion 8 b contacts the side wall 11 of the rotating body 4. While being loosely elastically contacted, the portion where the protrusion 13 is located is in a state of strong elastic contact. Further, the height H (distance between the operation knob 1 and the receiving portion 14) of the gap 50 is set to be larger than the height h of the O-ring 8, and the height of the O-ring 8 when the O-ring 8 is mounted. An escape is provided when the O-ring 8 is deformed, and the operation knob 1 and the receiving portion 14 are also provided when the O-ring 8 is deformed.
It does not come into contact with, but it is non-contact or light contact. The O-ring 8 is attached to the gap 50 with grease (not shown) applied thereto, and when the rotating body 4 rotates, the O-ring 8 is attached to the side wall 16 of the case 2.
b, the O-ring 8 does not move, and the surface of the projection 13 of the rotating body 4 slides while elastically contacting the O-ring 8 surface.
The wrinkle state caused by the friction with the rotating body 4 is reduced, and the rotating body 4 can be moved smoothly.

In this embodiment, of the upward sliders 20a to 20d and the downward sliders 19a to 19d, the slider 20a and the slider 19a, and the slider 20b and the slider 19b , And sliders 20c, 20d and slider 19c,
19d are electrically connected inside the case 2. The upward sliders 20a and 20b are located on the locus of the conductive pattern 3, and the remaining sliders 20a and 20b
c and 20d are metal plates 2 integral with the conductive pattern of the rotating body 4.
Always in contact with 2. Furthermore, the downward sliders 19a-
19c are always in contact with the fixed contacts 25a to 25c, while the remaining slider 19d is in contact with the switch pattern 25a.
and d.

In this state, when the operating knob 1 is rotated in either the forward or reverse direction, the rotating body 4 is also rotated in conjunction with the operating knob 1, and the sliders 20a and 20b are turned into the comb-shaped conductive patterns 3a. The first electrical signals are output from the A-phase external terminal 26a and the common external terminal 26c, and the B-phase external terminal 26b and the common external terminal 26c, respectively. At this time, when the rotating body 4 rotates, a heavy rotation torque acts due to the elasticity of the O-ring 8, and the operation knob 1 can be operated with a stable rotation torque. When the operation knob 1 is stopped, the operation knob is operated by the O-ring 8. 1 is held at that position.

When the operating knob 1 is pressed rightward from the state shown in FIG. 3, the operating knob 1, the rotating body 4, the case 2, and the support shaft 6 move integrally with respect to the fixed member 5. The flange 6 a of the support shaft 6 is formed in the concave portion 2 on the lower surface side of the fixing member 5.
7 slide inside. At this time, the downward sliders 19a to 19
Since c slides on the fixed contacts 25a to 25c, respectively, the electrical connection between the slider 20a and the A-phase external terminal 26a, the electrical connection between the slider 20b and the B-phase external terminal 26b, and Sliders 20c, 20d and common external terminal 2
6c is maintained. Then, when the operation knob 1 is pressed to the moving end shown in FIG.
The remaining downward slider 19d comes into contact with the switch pattern 25d, and the common external terminal 26c and the switch external terminal 26d conduct, so that the second electric signal is output from the external terminal 26d. At this time, the free end 7 of the return spring 7
a is elastically deformed by being pressed by the projection 24 of the case 2,
Since the free end 7a moves in the guide portion 32 of the fixing member 5, the return spring 7 is moved as shown in FIGS.
Is clicked when the free end 7a of the vehicle gets over the cam mountain 40. When the operating knob 1 is released in the state shown in FIG. 4, the operating knob 1, the rotating body 4, the case 2 and the support shaft 6 are pushed back to the initial positions shown in FIG.

In the embodiment configured as described above, different electric signals are output by rotating or pressing one of the operation knobs 1. Further, the click mechanism that generates a click feeling at the time of the pressing operation has a simple structure in which the free end 7a of the return spring 7 is merely engaged and disengaged from the cam ridge 40 of the elastic piece 39. In addition, it is possible to provide a small and thin rotary electric machine part for combined operation. In addition, since the elastic piece 39 is elastically deformed in the thickness direction at the time of the pressing operation, the free end 7a of the return spring 7 can be smoothly moved in the pressing direction, and the case 2 moves only in the sliding direction by the regulation of the regulating means. As a result, the sliding operation of the case 2 can be stabilized, so that the operation feeling at the time of the pressing operation becomes good, and a reliable click feeling can be obtained.

Further, since a tapered surface 27a which is inclined upward is formed on a part (rear side in the sliding direction) of the concave portion 27 of the fixing member 5, even if the spring force of the return spring 7 is set to a relatively small value, the operation is not performed. The pressing operation of the knob 1 can be performed reliably. That is, when the pressed state of the operation knob 1 is released, the support shaft 6 is moved only by the spring force of the return spring 7 as shown in FIG.
From FIG. 4, it is attempted to return to the state shown in FIG. 4. However, since the tapered surface 27a that is inclined upward in the traveling direction of the support shaft 6 is formed,
The end of the flange 6a of the support shaft 6 does not catch on the concave portion 27,
Return failure can be prevented. On the other hand, operation knob 1
4 is pressed from the state shown in FIG. 4 to the state shown in FIG. 5, since the support shaft 6 is moved by a large force of the operator, the flange 6a is not caught in the concave portion 27 and the flange 6a is moved in the traveling direction (sliding). (In the forward direction), it can move in a stable state along the flat surface of the concave portion 27 located at the front.

In the above embodiment, the rotating body 4 is provided with the side wall 11. However, instead of the side wall 11, a side wall may be provided on the operation knob 1 to form the gap 50. Although the receiving portion 14 located in the gap 50 has been described as being provided on the rotating body 4, the receiving portion may be provided in the case 2 to be located in the gap 50.
In the above description, the sliders 20a to 20d are provided, and the rotating body 4 is provided with the conductive pattern 3. However, the conductive pattern may be provided in the case 2 and the rotating body 4 may be provided with a slider. is there.

[0020]

According to the rotary electric machine component of the present invention, the O-ring 8 made of rubber is provided between the rotating body 4 or the side wall 16b of the operation knob 1 and the side wall 11 of the case 2. The O-ring 8 can be made large in diameter, and a heavy torque can be obtained, and a stable torque can be obtained. 4 can provide a rotation operation that is smooth and less wrinkled due to friction caused by the pressure contact, and has a good feel. Also, by providing the rotating body 4 with the side wall 11 and the receiving portion 14, the rotating body 4 is incorporated into the case 2 to form a gap 50, and the O-ring 8 is incorporated into the gap 50, and then the operation knob 1 is assembled. , The assemblability is good, the productivity is good, and an inexpensive product can be provided. In addition, by providing the plurality of protrusions 13 for pressing the O-ring 8, the contact area with the O-ring 8 can be reduced, and a change in the size of the component, a change in the rotational torque due to the variation, and a variation can be suppressed. I can do it.

Further, since the plurality of projections 13 are arranged so as to be located at the vertices of the equilateral triangle, the contact surface in the rotating direction with the O-ring 8 is reduced, and a stable and good torque can be obtained. The O-ring 8 can be stably held. In addition, since the relief of the O-ring 8 is provided in the height direction of the gap 50, the O-ring 8 is pressed only in the radial direction, so that the torque can be stabilized and the torque can be easily controlled. In addition, since the flat portions are provided at the outermost and innermost circumferences of the O-ring 8, the contact surface can be increased, a heavy torque can be obtained, and the contact area can be made constant, resulting in dimensional changes and variations of parts. Changes and variations in rotational torque can be kept extremely small. Further, the protrusion 1 of the rotating body 4
3 is engaged with the operation knob 1, the assembly of the operation knob 1 and the rotating body 4 is easy and small, and the projection 1
3 can be used both for pressing the O-ring 8 and for attaching to the operation knob 1, and can provide a small and inexpensive device with a small number of parts.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotary electric component according to the present invention.

FIG. 2 is a perspective view showing a state where a rotary electric component of the present invention is pressed.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a sectional view taken along line CC of FIG. 1;

FIG. 6 is a plan view of the rotary electric component of the present invention.

FIG. 7 is a rear view of the rotary electric component of the present invention.

FIG. 8 is a plan view of the rotary electric component according to the present invention, in which an operation knob and a rotating body are removed.

FIG. 9 is a sectional view taken along line DD in FIG. 1;

FIG. 10 is a cross-sectional view for explaining the operation of an elastic piece according to the rotary electric component of the present invention.

FIG. 11 is an exploded perspective view of the rotary electric component of the present invention.

FIG. 12 is a plan view of an O-ring according to the rotary electric component of the present invention.

FIG. 13 is a sectional view taken along line EE of FIG. 12;

FIG. 14 is a sectional view of a conventional rotary electric component.

[Explanation of symbols]

 Reference Signs List 1 operation knob 1a insertion hole 9a insertion hole 2 case 2a, 2b projection 16a bottom wall 16b side wall 17 connecting portion 18 insertion hole 24 projection 3 conductive pattern 4 rotating body 10 bottom wall 11 side wall 12 cylindrical body 13 projection 14 receiving section 15 insertion Hole 5 fixing member 5a long hole 5b wall 27 concave 27a taper 28, 29 wall 30, 34 overhang 31, 35 receiving 32 guide 33 partition wall 36 storage 37, 38 slit 39 elastic piece 40 cam peak 6 Support shaft 6a Flange portion 7 Return spring 7a Free end 7b Bending portion 8 O-ring 8a, 8b Flat surface portion 19a Slider 19b Slider 19c Slider 19d Slider 20a Slider 20b Slider 20c Slider 20d Slider 25a Fixed contact 25b Fixed contact 25c Fixed contact 25d Switch pattern 26a External terminal 2 b external terminal 26c external terminal 26d external terminal 50 gap

Claims (7)

[Claims] 1. A case having a bottom wall and a first cylindrical side wall, a rotatable operation knob, and a rotating member disposed opposite to the operation knob and rotated together with the operation knob to have a bottom wall. A body, a support shaft rotatably supporting the operation knob and the rotating body, a slider provided on one of the bottom wall of the case or the bottom wall of the rotating body, and a bottom wall of the case Alternatively, a conductive pattern provided on the other of the bottom walls of the rotating body and in sliding contact with the slider may be made of rubber material.
A ring, and the operation knob or the rotating body includes:
A predetermined gap is provided to form a cylindrical second side wall facing the case, and the rotating body or the case is provided with a receiving portion located in the gap, and the first side wall and the second 2. A rotary electric component characterized in that the O-link is provided in the gap surrounded between the side wall and the receiving portion, and the O-ring is elastically contacted with the first and second side walls. . 2. The rotary electric component according to claim 1, wherein the second side wall and the receiving portion are formed on the rotating body. 3. The rotary electric component according to claim 1, wherein a plurality of projections projecting outside the second side wall are provided. 4. The rotary electric component according to claim 3, wherein the plurality of protrusions are disposed so as to be located at the vertices of an equilateral triangle. 5. The clearance according to claim 1, wherein a height of the gap is made larger than a height of the O-ring, and a relief of the O-ring is provided in a height direction. Or 4
The described rotary electrical component. 6. A flat portion is provided on the outermost and innermost circumferences of the O-ring, and the flat portion is provided on each of the first and second side walls or the first and second side walls and the projection. The rotary electrical component according to claim 1, 2, 3, or 4, or 5, wherein the rotary electrical component is in contact with the rotary electrical component. 7. The method according to claim 2, wherein the projection is engaged with the operation knob.
Or a rotary electric component according to 6.