JP2007149429A - Rotary switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary switch having a long life by alleviating wear of a click mechanism for obtaining a click feeling. <P>SOLUTION: The rotary switch comprises a rotor 9 capable of rotation, a housing 2 having a hollow part 2a to house rotatably a part of this rotor 9, a fixed contact 4 arranged in the hollow part 2a, a movable contact 8 which is installed on the rotor 9 and can contact and separate from the fixed contact 4, and a cover member 10 which covers over the hollow part 2a of the housing 2. A click mechanism in which click feeling is obtained accompanied with rotation of the rotor 9 is arranged over the hollow part 2a of the housing 2. The click mechanism is constructed of an elastic member 11 and a cover member 10 respectively made of metal plate, and a plurality of click generating parts 10c in which click feeling is obtained as the elastic member 11 rotating together with the rotor 9 slides on them is formed on the cover member 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary switch and relates to a rotary switch capable of switching menus and the like displayed on a display of a digital camera or the like.

A conventional rotary switch will be described with reference to, for example, the one described in Patent Document 1. The rotary switch 30 described in Patent Document 1 is provided with a housing 31 made of a resin material at the bottom as shown in FIGS. The housing 31 is formed with a base portion 31c having a cylindrical support portion 31a and a substantially annular storage portion 31b on the lower end side of the support portion 31a.
An opening 31d is formed in the base portion 31c so as to extend outward, and a fixed terminal portion 32 is disposed in the opening 31d. The fixed terminal portion 32 has a base 32a made of an insulating material and a plurality of connection terminals 32b extending from one end side of the base 32a. The plurality of connection terminals 32 b are embedded in the base 32 a and are connected to a plurality of sliders 32 c extending from the other end side of the base 32 a.

A circuit board 33 made of a resin material is disposed in the housing part 31b of the housing 31, and the circuit board 33 is formed with an insertion hole 33a through which the support part 31a of the housing 31 can be inserted in the center to form an outer shape. It is formed in a substantially annular shape.
The circuit board 33 has a plurality of annular contact portions (not shown) that are in sliding contact with the slider 32 c on the lower surface, and is fixed to the lower surface of the rotating body 34.
The circuit board 33 rotates with the rotation of the rotating body 34, so that the contact portion slides on the slider 32c and the switch circuit is switched.
The rotating body 34 is made of a resin material, and is formed with a cylindrical rotating shaft portion 34a that is inserted into the support portion 31a of the housing 31 and is rotatable.

In addition, a flange-shaped rotation base 34b that is accommodated in the accommodation portion 31b of the housing 31 is formed on the lower end side of the rotation shaft portion 34a, and the circuit board 33 is fixed to the lower surface of the rotation base 34b with an adhesive or the like. ing. On the upper surface of the rotation base 34b, a plurality of concave grooves 34c are formed in the inner peripheral area on the inner side in the circumferential direction, and a flat auxiliary spring receiving part 34d is formed in the outer peripheral area on the outer side of the concave groove 34c. Yes.
In addition, a substantially annular spring member 35 is disposed on the concave groove 34c, and a pair of flat portions 35a are formed at opposite positions of the spring member 35, and a caulking hole 35b is formed in the flat portion 35a. ing.

The spring member 35 is formed with an elastic arm portion 35c having both ends bent into a substantially V shape with the flat portion 35a as a boundary, and a concave groove is formed at the center of one end of the elastic arm portion 35c on the far side in the drawing. A protrusion 35d that can be engaged and disengaged is formed on 34c.
An auxiliary spring portion 35e having a substantially T shape and a free end is formed along the arc direction of the elastic arm portion 35c, extending outward from the vicinity of the convex portion 35d.

In addition, the frame 36 made of a metal plate disposed on the upper portion of the spring member 35 is formed with a window hole 36a through which the rotation shaft portion 34a of the rotating body 34 is inserted, and for attaching the spring member 35 to the lower surface. A pair of mounting holes 36b are formed.
The rivet 37 is inserted and caulked in a state where the caulking hole 35b of the spring member 35 is overlapped with the mounting hole 36b, whereby the spring member 35 is fixed and integrated with the frame 36.
The frame 36 is formed with a plurality of engagement pieces 36c for caulking the housing 31 so as to embrace it, and mounting legs 36d for attachment to a substrate (not shown) such as an electronic device by reflow soldering or the like. Has been.
Such a conventional rotary switch is assembled by caulking the engagement piece 36c of the frame 36 to the housing 31, and the attachment leg 36d can be attached to a substrate such as an electronic device by reflow soldering or the like.

The operation of the conventional rotary switch having such a configuration is as follows. First, when a knob (not shown) attached to the rotating shaft portion 34a of the rotating body 34 is rotated, the rotating body 34 is moved around the support portion 31a of the housing 31. Rotate.
At this time, the circuit board 33 attached to the rotating body 34 is rotated, and the contact portion (not shown) formed on the circuit board 33 is slid in a state of being in contact with the slider 32c of the fixed terminal portion 32. The switch is switched.
Further, as the rotating body 34 rotates, as shown in FIG. 8, the free end portion of the auxiliary spring portion 35 e is in sliding contact with the flat auxiliary spring receiving portion 34 d in contact with the rotating body 34. The concave groove 34c is engaged with and disengaged from the convex portion 35d of the spring member 35, and a click feeling is obtained.
In other words, a click mechanism is configured by the concave groove 34c of the rotating body 34 made of a resin material and the convex portion 35d of the spring member 35 made of a metal plate so that a click feeling can be obtained.
JP 2002-110002 A

However, in the conventional rotary switch, since the rotating body 34 is formed of a resin material and the spring member 35 is formed of a metal plate, the concave groove 34c of the rotating body 34 that is a click mechanism is formed on the convex portion of the spring member 35. By repeatedly engaging and disengaging the portion 35d, there is a problem that the corner portion of the concave groove 34c is scraped and worn, and the life of the rotary switch is shortened.
In addition, abrasion grooves such as resin powder are generated by cutting the concave groove 34c, and may adhere to the contact portion of the slider 32c or the circuit board 33, resulting in a poor conduction of the switch. .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a long-life rotary switch by reducing wear of a click mechanism for obtaining a click feeling.

As a first means for solving the above-described problems, a rotary switch of the present invention includes a rotatable rotating body, a housing having a hollow portion that rotatably accommodates a part of the rotating body, and a hollow portion. A fixed contact that is provided, a movable contact that is attached to the rotating body and that can be contacted with and separated from the fixed contact, and a cover member that covers the cavity of the housing. A click mechanism that provides a click feeling with rotation is provided. The click mechanism includes an elastic member made of a metal plate and the cover member, and the cover member rotates together with the rotating body. A plurality of click generating portions that can provide a click feeling when the elastic member slides are formed.
Further, as a second means for solving the above-mentioned problem, the elastic member is formed with an engaging / disengaging portion that can be engaged / disengaged with the click generating portion, and the cover member has the engaging / disengaging portion of the elastic member. And a plurality of click generating portions are formed in the sliding portion.

As a third means for solving the problem, the click generating portion of the cover member includes a plurality of holes that penetrate the sliding portion at a predetermined interval, and the engagement / disengagement of the elastic member. The portion is formed in a convex shape that can be engaged with and disengaged from the hole.
As a fourth means for solving the above problem, the housing is provided with a cover mounting portion having a predetermined height that surrounds the outer periphery of the cavity portion, and the cover member has an outer portion of the sliding portion. An engaging portion that can be engaged with an engaging portion formed on the cover attaching portion by bending a peripheral edge is formed.

As a fifth means for solving the problem, the elastic member is formed with a fixing portion that can be fixed to the rotating body, and the fixing portion is fixed to the rotating body so that the rotating body and the rotating member are fixed. An elastic member is integrated, and a pair of the engaging / disengaging portions are formed at symmetrical positions with the rotating body interposed therebetween.
Further, as a sixth means for solving the above-mentioned problem, the rotating body has a rotating base portion that is housed in the hollow portion of the housing and is rotatable, and the movable contact is attached to the rotating base portion. The slider receiver is fixed and can rotate together with the rotating body.

Further, as a seventh means for solving the above-mentioned problem, a support portion that rotatably supports the slider receiver protrudes at a predetermined height on the bottom wall of the hollow portion where the fixed contact is disposed. The rotary switch according to claim 6, wherein the rotary switch is formed.
Further, as an eighth means for solving the above-mentioned problem, a recess having a predetermined depth is formed in the cover mounting portion of the housing, which is opposed to the click generating portion formed of the hole portion formed in the cover member. It is characterized by being.

Further, as a ninth means for solving the above-mentioned problem, the concave portion is formed by an arc-shaped concave groove formed in the cover mounting portion at a position facing the click generating portion.
Further, as a tenth means for solving the above problem, a support shaft protruding upward is formed on the bottom wall of the central portion of the hollow portion, and the slider receiver facing the support shaft is formed. The rotation center is formed with a support hole that can be rotated by being fitted to the support shaft.

The click mechanism of the rotary switch according to the present invention includes an elastic member and a cover member each made of a metal plate, and a plurality of click feelings can be obtained by sliding an elastic member that rotates together with the rotating body on the cover member. Since the click generating portion is formed, each of the elastic member and the cover member constituting the click mechanism is made of a metal material, so that wear of each member can be reduced and a long-life rotary switch can be provided. . Further, by using both the elastic member and the cover member as metal plates, the members can be pressed strongly, and a large and highly sensitive click feeling can be obtained.
Further, the elastic member is formed with an engaging / disengaging portion that can be engaged / disengaged by sliding the click generating portion, and the cover member is formed with a sliding portion capable of sliding the engaging / disengaging portion. Since a plurality of click generation portions are formed in the portion, the engagement / disengagement portion can disengage the click generation portion, thereby obtaining a highly sensitive click feeling.

Further, the click generation part of the cover member is composed of a plurality of holes that penetrate the sliding part at a predetermined interval, and the engagement / disengagement part of the elastic member is formed in a convex shape that can be engaged / disengaged in the hole. In addition, the click-engaging part formed by the convex engagement / disengagement part including the hole part can be disengaged to obtain a more sensitive click feeling.
The housing is formed with a cover mounting portion having a predetermined height that surrounds the outer periphery of the hollow portion, and the cover member can be locked by engaging a locking portion formed by bending the outer peripheral edge of the cover member. Since the engaging portion is formed, the cover member can be securely locked to the housing by snap-engaging the locking portion of the cover member with the engaging portion of the housing.

In addition, the elastic member is formed with a fixing portion that can be fixed to the rotating body, the fixing portion is fixed to the rotating body, and the rotating body and the elastic member are integrated. Therefore, the elastic member can be elastically biased equally to the cover member in a balanced manner by the pair of engaging / disengaging portions.
The rotating body has a rotating base portion that is housed in a hollow portion of the housing and is rotatable, and a slider receiver having a movable contact attached thereto is fixed to the rotating base portion so that the rotating body can rotate together with the rotating body. Therefore, by attaching the slider receiver to which the movable contact is attached to the rotating body, the movable contact can be integrated with the rotating body, and the assemblability is good.

In addition, a support wall that rotatably supports the slider receiver is formed at a predetermined height on the bottom wall where the fixed contact of the hollow portion is disposed, so that the movable contact is pressed against the fixed contact by the support wall. The pressure can be made uniform.
In addition, since a recess having a predetermined depth is formed in the cover mounting portion of the housing, which is opposed to the click generation portion formed by the hole formed in the cover member, the cover member or the elastic member is worn and wear powder is generated. Even if it occurs, it is possible to prevent the wear powder from entering the contact portion in the cavity portion in the concave portion.

Further, since the concave portion is formed by an arc-shaped concave groove formed in the cover mounting portion at a position facing the click generating portion, it is easy to manufacture a mold for molding the housing.
A support shaft that protrudes upward is formed on the bottom wall of the central portion of the hollow portion, and a support hole that can rotate by being fitted to the support shaft at the rotation center of the slider receiver that faces the support shaft. Therefore, the eccentricity of the rotating body when rotating can be prevented.

Embodiments of a rotary switch according to the present invention will be described below with reference to the drawings. First, a rotary switch 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. A housing 2 made of a resin material whose outer shape is formed in a polygon (for example, substantially octagonal) is disposed at the bottom. Has been.
The housing 2 is formed with a circular cavity 2a having a predetermined diameter and depth at the center, and the cavity 2a is provided with a slider receiver 7 attached to and integrated with a rotating body 9 described later. It can be stored in a rotatable manner. The cavity 2a is shielded at the bottom by the bottom wall 2b and opened upward, and the outer periphery is surrounded by the cover mounting portion 2c.

In addition, hook-shaped engagement portions 2d are formed to protrude at four locations on the outer peripheral surface of the cover mounting portion 2c that face each other. On the outer peripheral side of the hollow portion 2a on the bottom wall 2b, a support wall 2e that rotatably supports a slider receiver 7 attached to a rotating body 9 described later is formed at a predetermined height.
Further, as shown in FIG. 3, a positioning projection 2f for positioning on a substrate (not shown) such as an electronic device is formed on the rear surface of the housing 2 so as to project.
Further, in the cover mounting portion 2c outside the cavity portion 2a, a concave portion 3 made of an annular concave groove is formed at a predetermined depth at a position facing a hole-shaped click generating portion 10c of the cover member 10 described later. Yes.
A fixed contact 4 is exposed and disposed on the bottom wall 2b of the cavity 2a. The fixed contact 4 is arranged at a position near the outer periphery of the cavity 2a. While being formed adjacent to each other in the direction, an annular common contact 4b is formed at a position on the inner peripheral side of the individual contact 4a.

The fixed contact 4 has individual contacts 4a and common contacts 4b insulated from each other, embedded in the bottom wall 2b and the cover mounting portion 2c, and connected to a plurality of external terminals 5 led out of the housing 2.
Further, a support shaft 6 is formed on the bottom wall 2b at the center of the cavity 2a so as to protrude with a predetermined diameter and height.
Further, in the hollow portion 2a, the slider receiver 7 made of a resin material and having a circular outer shape can be stored without play. The slider receiver 7 is formed with a circular and concave fitting portion 7a on the upper surface to which a rotating base 9a of a rotating body 9 to be described later can be fitted, and the fitting portion 7a has a D-cut detent portion. 7b is formed, and a support hole 7c that can be rotated without play is formed by fitting the support shaft 6 in the center.

Also, on the lower surface of the slider receiver 7, there are a first slider 8a that can be slid in pressure contact with the common contact 4b, and a second slider 8b that can be slid in pressure contact with the individual contact 4a. The formed substantially annular movable contact 8 is attached.
The movable contact 8 is formed with a pair of mounting holes 8 c at positions facing each other, and the pair of mounting holes 8 c are fixed to the lower surface of the slider receiver 7 by caulking or the like. The slider receiver 7 to which the movable contact 8 is attached is integrated with the rotating body 9 with an adhesive or the like by fitting the fitting portion 7a with the rotating base 9a of the rotating body 9.

The rotating body 9 is made of a resin material or the like and has a rotating base portion 9a having a large diameter at the bottom, a cover fitting portion 9b having a diameter smaller than the rotating base portion 9a at the upper portion of the rotating base portion 9a, and a cover fitting portion 9b. An elastic member fitting portion 9c having a diameter smaller than that of the cover fitting portion 9b is formed on the upper portion and has a stepped shape.
And the attachment part 9d in which the adhering part 11b of the elastic member 11 mentioned later can be fitted is carved and formed in the elastic member fitting part 9c. Further, the rotary body 9 is formed with a knob portion 9e having a smaller diameter than the elastic member fitting portion 9c so as to protrude upward in the drawing.

Further, on the hollow portion 2a, a click mechanism that provides a click feeling with the rotation of the rotating body 9 is disposed. The click mechanism includes a cover member 10 and an elastic member 11 each made of a metal plate. It consists of
The cover member 10 is made of a metal plate such as an iron plate, and has an insertion hole 10a that fits in the cover fitting portion 9b of the rotating body 9 without any play, and an outer shape that is substantially annular on the outer peripheral side of the insertion hole 10a. A flat sliding portion 10b is formed.
Further, the sliding portion 10b is formed with a click generating portion 10c composed of a plurality of holes that are penetrated and formed at predetermined intervals by press working or the like.

Since the click generating portion 10c formed of the hole is punched from one surface (the upper surface in the drawing), a sag (shear surface) is formed at the corner portion on one surface side, and the other surface ( A burr (fracture surface) is formed on the lower surface side in the figure.
Therefore, a convex engagement / disengagement portion 10a of the elastic member 11 described later can be engaged / disengaged with the click generation portion 10c without difficulty, and a click feeling with a good feeling can be obtained.
Further, the cover member 10 is formed with a locking portion 10d by bending four portions of the outer peripheral edges of the sliding portion 10b facing each other downward in the figure.
In such a cover member 10, when the sliding portion 10 b is placed on the cover mounting portion 2 c so as to shield the hollow portion 2 a of the housing 2, the locking portion 10 d snap-engages with the engaging portion 2 d of the housing 2. And is to be locked.

In addition, the elastic member 11 which is a part of the click mechanism is made of a metal plate having elasticity such as stainless steel, the outer shape is formed in a substantially elliptical shape, and is fitted to the elastic member fitting portion 9c of the rotating body 9 at the center. A possible fitting hole 11a is formed, and a pair of fixing portions 11b are formed to protrude inward at positions facing each other on the inner peripheral surface of the fitting hole 11a.
In the elastic member 11, arc-shaped slit grooves 11c and 11c are formed outside the pair of fixing portions 11b, and elastic arm portions 11d and 11d are formed outside the slit groove 11c, respectively.
A pair of convex engaging / disengaging portions 11e are formed at the opposing positions of the elastic arm portions 11d so as to protrude downward in the figure.

Such an elastic member 11 is inserted into the knob portion 9e of the rotating body 9 inserted through the insertion hole 10a of the cover member 10 attached to the housing 2, and the fixing portion 11b is aligned with the attachment portion 9d through the fitting hole 11a. Then, the elastic member 11 is integrated with the rotating body 9 and can be rotated together with the rotating body 9 by fitting the mounting portion 9d with an assembly jig (not shown).
When the elastic member 11 rotates together with the rotating body 9, the engagement / disengagement portion 11e slides on the sliding portion 10b, and the click generation portion 10c formed by the hole is engaged / disengaged. As a result, the operator can obtain a highly sensitive click feeling.

In assembling the rotary switch 1 of the present invention having such a configuration, the slider receiver 7 integrated with the rotating body 9 is accommodated in the cavity 2 a of the housing 2. Then, the outer peripheral side of the slider receiver 7 is positioned on the support wall 2e, and the movable contact 8 attached to the slider receiver 7 is pressed against the fixed contact 4 disposed on the bottom wall 2b of the housing 2.
Thereafter, the knob portion 9e of the rotating body 9 is inserted into the insertion hole 10a of the cover member 10 so that the insertion hole 10a is fitted into the cover fitting portion 9b of the rotating body 9, and the sliding portion 10b is covered with the cover of the housing 2. It is located on the attachment part 2c. Then, the locking portion 10d is snap-engaged with the engaging portion 2d, and the cover member 10 is integrated with the housing 2.

Then, the click generation part 10 c of the cover member 10 is positioned on the recess 3 of the housing 2 and the rotating body 9 is prevented from being detached from the cavity part 2 a by the cover member 10.
Next, when the fixing portion 11b of the elastic member 11 is aligned and fitted to the attachment portion 9d of the rotating body 9 inserted upward from the insertion hole 10a of the cover member 10, the fitting hole 11a of the elastic member 11 is elastic. It fits in the member fitting part 9c.
Then, the elastic member 11 is integrated with the rotating body 9 by caulking the attachment portion 9d with an assembly jig or the like, and the rotary switch 1 of the present invention is assembled.

When the rotary switch 1 assembled in this way is operated, when the operator rotates the knob 9e of the rotating body 9, the engaging / disengaging portion 11e of the elastic member 11 slides on the sliding portion 10b of the cover member 10. Thus, the click generating portion 10c formed of the hole portion is engaged and disengaged to generate a click feeling.
In response to this click feeling, the first slider 8a contacts and separates the plurality of individual contacts 4a to switch the switch circuit.
That is, in conjunction with the switching of the switch circuit, the operator can obtain a click feeling and is excellent in operability.
Such a rotary switch 1 of the present invention is used in an electronic device such as a digital camera, for example. By rotating the rotating body 9, selection of a menu or the like displayed on the display, scrolling, or the like is performed. It can be done.

The concave portion 3 formed in the cover mounting portion 2c of the housing 2 has been described as a concave groove having a predetermined depth and width in FIG. 1, but at a position facing the click generating portion 10c formed by the hole portion of the cover member 10. The cover mounting portion 2c may be formed by digging into a square hole with a predetermined depth.
Moreover, although the click generating portion 10c of the cover member 10 has been described as a hole punched out in a square hole shape, the sliding portion 10b may be recessed in a downward shape in the figure at a predetermined depth.

It is a disassembled perspective view of the rotary switch of this invention. It is a top view of the rotary switch of the present invention. FIG. 3 is a side view of FIG. 2. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 2. FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. 3. It is a disassembled perspective view of the conventional rotary switch. It is a principal part enlarged view of the rotary body of the conventional rotary switch. It is principal part sectional drawing explaining the relationship between the rotary body of the conventional rotary switch, and the convex part of a spring member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary switch 2 of this invention Housing 2a Cavity 2b Bottom wall 2c Cover attaching part 2b Engagement part 2e Support wall 3 Recessed part 4 Fixed contact 4a Individual contact 4b Common contact 5 External terminal 6 Support shaft 7 Slider receiver 7a Fitting Part 7b Non-rotating part 7c Support hole 8 Movable contact 8a First slider 8b Second slider 8c Mounting hole 9 Rotating body 9a Rotating base 9b Cover fitting part 9c Elastic member fitting part 9d Mounting part 9e Knob part 10 Cover member 10a Insertion hole 10b Sliding part 10c Click generating part 10d Locking part 11 Elastic member 10a Fitting hole 11b Adhering part 11c Slit groove 11d Elastic arm part 11e Engaging / disengaging part

Claims (10)

A rotatable rotating body, a housing having a hollow portion that rotatably accommodates a part of the rotating body, a fixed contact disposed in the hollow portion, and a fixed contact attached to and separated from the fixed contact. A movable contact that is possible, and a cover member that covers the cavity of the housing,
On the hollow portion, a click mechanism that provides a click feeling with the rotation of the rotating body is disposed, and the click mechanism includes an elastic member made of a metal plate and the cover member, The rotary switch according to claim 1, wherein the cover member is formed with a plurality of click generating portions that provide a click feeling when the elastic member that rotates together with the rotating body slides.   The elastic member is formed with an engaging / disengaging portion that can be engaged and disengaged by sliding the click generating portion, and the cover member is formed with a sliding portion that allows the engaging / disengaging portion to slide, The rotary switch according to claim 1, wherein a plurality of the click generation portions are formed in the sliding portion.   The click generating portion of the cover member is formed of a plurality of holes that penetrate the sliding portion at a predetermined interval, and the engagement / disengagement portion of the elastic member is formed in a convex shape that can be engaged / disengaged in the hole. The rotary switch according to claim 2, wherein the rotary switch is provided.   The housing is formed with a cover mounting portion having a predetermined height that surrounds the outer periphery of the cavity, and the cover mounting portion has a locking portion formed by bending the outer peripheral edge of the sliding portion of the cover member. The rotary switch according to claim 2, wherein an engaging portion that can be engaged and locked is formed.   The elastic member is formed with a fixing portion that can be fixed to the rotating body, the fixing portion is fixed to the rotating body, and the rotating body and the elastic member are integrated. 5. The rotary switch according to claim 2, wherein the rotary switch is formed in a pair at symmetrical positions with the rotating body interposed therebetween.   The rotating body has a rotating base that is housed in the hollow portion of the housing and can rotate, and a slider receiver to which the movable contact is attached is fixed to the rotating base and can rotate together with the rotating body. The rotary switch according to claim 2, wherein the rotary switch is configured as follows.   7. The rotary according to claim 6, wherein a support wall that rotatably supports the slider receiver is formed to protrude at a predetermined height on a bottom wall of the hollow portion where the fixed contact is disposed. switch.   8. The concave portion having a predetermined depth is formed in the cover mounting portion of the housing facing the click generation portion formed of the hole portion formed in the cover member. Or the rotary switch according to item 1.   The rotary switch according to claim 8, wherein the concave portion is an arc-shaped concave groove formed in the cover mounting portion at a position facing the click generation portion. A support shaft that protrudes upward is formed on the bottom wall at the center of the hollow portion, and the center of rotation of the slider receiver that opposes the support shaft is fitted to the support shaft and can be rotated. The rotary switch according to claim 7, wherein a support hole is formed.

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