KR20070055397A - Rotary switch - Google Patents

Abstract

assignment

The present invention provides a rotary switch having a long service life by reducing the wear of the click mechanism while not causing deformation such as bending even when the housing is thinned.

Resolution

In the housing 2 according to the present invention, the lower side is shielded by the bottom wall 3, the periphery is surrounded by the outer circumferential wall 2a, and the inside thereof is hollow, and the inside of the cavity of the housing 2 is a rotating body. With the rotation of (9), the click mechanism which obtains a click feeling is arrange | positioned, The said click mechanism is clicked on the click plate 7 which consists of a metal plate, and the some click generation part 7b formed in this click plate 7. It has an elastic member 10 which consists of a metal plate by which a click feeling is obtained by sliding, and the said elastic member 10 is rotatable with the rotating body 9, and the click board 7 is the bottom wall 3 of the housing. Since it is arrange | positioned on and pressed to the bottom wall by the elastic support force of the elastic member 10, deformation of a housing can be prevented.

Description

Rotary switch {ROTARY SWITCH}

1 is an exploded perspective view of a rotary switch of the present invention.

2 is a top view of the rotary switch of the present invention.

3 is a side view of FIG. 2.

4 is a cross-sectional view taken along line 4-4 of FIG. 2.

5 is a cross-sectional view taken along line 5-5 of FIG. 2.

6 is an exploded perspective view of a conventional rotary switch.

7 is an enlarged view of a main portion of a rotating body of a conventional rotary switch.

Fig. 8 is a sectional view showing the main parts of a related art for explaining a relationship between a rotating body of a conventional rotary switch and a convex portion of a spring member.

* Description of the sign *

1: rotary switch of the invention 2: housing

2a: outer circumferential wall 2b: hook portion

2c: engaging portion 2d: positioning projection

2e: cavity 3: bottom wall

3a: dustproof wall 3b: inner peripheral area

3c: outer area 3d: relief groove

3e: Click plate receiving part 4: Fixed contact

4a: individual contacts 4b: common contacts

5 external terminal 6 support shaft

7: click plate 7a: sliding part

7b: click generation unit 7c: rotation prevention unit

7d: bend portion 8: movable contact

8a: first sliding element 8b: second sliding element

8c: mounting hole 9: rotating body

9a: base 9b: handle

9c: female part 9d: stone part

9e: support hole 10: elastic member

10a: hang / release section 11: holding member

11a: shield 11b: shaft hole

11c: door

[Patent Document 1] Japanese Unexamined Patent Publication No. 2002-110002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary switch, and more particularly to a rotary switch capable of switching a menu or the like displayed on a display such as a digital camera.

When the conventional rotary switch is described, for example as described in patent document 1, the rotary switch 30 described in patent document 1 is the housing | casing 31 which consists of a resin material in the lowest part as shown in FIG. 6, FIG. ) Is disposed, and a base portion 31c having a cylindrical support portion 31a and a substantially annular accommodating portion 31b is formed on the lower end side of the support portion 31a. .

An opening 31d is formed in the base portion 31c to the outside, and a fixed terminal portion 32 is disposed in the opening 31d. Moreover, the fixed terminal part 32 is formed by the base 32a which consists of an insulating material, and the some connection terminal 32b extended from the one end side of this base 32a. The plurality of connection terminals 32b are embedded in the base 32a and are connected to the plurality of sliding elements 32c extending from the other end side of the base 32a.

Moreover, the circuit board 33 which consists of resin materials is arrange | positioned in the accommodating part 31b of the housing 31, and this circuit board 33 can pass the support part 31a of the housing 31 in the center. The insertion through hole 33a is formed, and the external shape is formed in the annular shape.

In addition, the circuit board 33 has a plurality of annular contact portions (not shown) which slide with the sliding element 32c on the lower surface thereof, and are fixed to the lower surface of the rotating body 34.

As the circuit board 33 rotates with the rotation of the rotating body 34, the contact portion slides with respect to the sliding element 32c so that the switch circuit is switched.

The rotating body 34 is made of a resin material, and a cylindrical rotating shaft portion 34a, which is inserted into the support portion 31a of the housing 31 and is rotatable, is formed.

Moreover, the flange-shaped base 34b accommodated in the accommodating part 31b of the housing 31 is formed in the lower end side of the rotating shaft part 34a, and the circuit board 33 is provided in the lower surface of this base 34b. It is fixed by an adhesive or the like. On the upper surface of the base 34b, a plurality of concave grooves 34c are formed in the inner inner circumferential region in the circumferential direction, and an auxiliary spring receiving portion 34d having a flat shape in the outer circumferential region outside the concave groove 34c. ) Is formed.

Moreover, a substantially annular spring member 35 is disposed on the concave groove 34c, and a pair of flat portions 35a are formed at positions where the spring members 35 face each other, and this flat portion 35a is provided. The caulking hole 35b is formed in ().

Moreover, the spring member 35 is provided with the elastic arm part 35c which bend | folded the both ends in substantially V shape on the boundary of the flat part 35a, and is formed in the center of the one end side of this elastic arm part 35c. A convex portion 35d that can be hooked to or released from 34c is formed.

An auxiliary spring portion 35e is formed which extends outward from the convex portion 35d to the outside and is substantially T-shaped and free-end in the arc direction of the elastic arm portion 35c.

In addition, a window hole 36a through which the rotating shaft portion 34a of the rotating body 34 is inserted is formed in the frame 36 made of a metal plate disposed above the spring member 35, and the spring member 35 ) Is provided with a pair of attachment holes 36b for attaching to the lower surface.

And the spring member 35 is fixed to and integrated with the frame 36 by inserting and caulking the rivet 37 in the state which superposed the caulking hole 35b of the spring member 35 in the attachment hole 36b.

The frame 36 includes a plurality of engaging pieces 36c for caulking and attaching to the housing 31, and an attachment leg 36d for attaching to a substrate (not shown) such as an electronic device with reflow solder or the like. ) Is formed.

Such a conventional rotary switch is assembled by caulking the engaging piece 36c of the frame 36 to the housing 31, and the attachment leg 36d of the frame 36 projecting downward from the housing 31 is provided. And reflow solder or the like to a substrate such as an electronic device.

In operation of the conventional rotary switch having such a configuration, first, by rotating the handle (not shown) attached to the rotating shaft portion 34a of the rotating body 34, the center of the support portion 31a of the housing 31 is centered. The rotating body 34 rotates.

At this time, the circuit board 33 attached to the rotating body 34 rotates, and the contact portion (not shown) formed on the circuit board 33 is moved to the sliding element 32c of the fixed terminal portion 32. The switch is switched by sliding in abutting state.

Moreover, when the rotating body 34 rotates, as shown in FIG. 8, while the free end part of the auxiliary spring part 35e slides in the state which contacted the flat auxiliary spring receiving part 34d, the rotating body The concave groove 34c of the 34 is engaged or released with respect to the convex portion 35d of the spring member 35 to obtain a feeling of click.

That is, a click mechanism is comprised by the concave groove 34c of the rotating body 34 which consists of resin materials, and the convex part 35d of the spring member 35 which consists of metal plates, and can obtain a click feeling.

However, in the case of the conventional rotary switch, when the housing 31 is made thin in response to the recent demand for thinning, the rotary switch is attached to the thin housing 31 due to heat when it is attached to a substrate such as an electronic device by reflow soldering or the like. There exists a possibility that a problem, such as a curvature or a torsion, may arise. For this reason, the conventional rotary switch needed the exclusive member for preventing deformation of a housing.

Moreover, since the rotating body 34 is formed of the resin material, and the spring member 35 is formed of the metal plate, the recessed groove 34c of the rotating body 34 which is a click mechanism is convex of the spring member 35. By repeating the hanging or releasing to the portion 35d, the corner portion of the concave groove 34c is shaved and worn, resulting in a shortened life of the rotary switch.

Moreover, the recessed groove 34c is cut off, and abrasion powders, such as resin powder, generate | occur | produce, and it adheres to the sliding element 32c or the contact part of the circuit board 33, etc., and a switch may become a conductive failure etc. there was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide a rotary switch having a long service life by reducing the wear of the click mechanism while reducing the deformation of the housing even when the housing is thinned. .

Means to solve the problem

As a first means for solving the above problems, the rotary switch of the present invention includes a housing having a rotatable rotor, a cavity for rotatably accommodating a part of the rotor, and a fixed contact disposed in the cavity. And a movable contact attached to the rotating body, the movable contact being in contact with / detachable from the fixed contact, and a holding member for shielding on the cavity of the housing and holding the rotating body so as to be rotatable.

The housing has a bottom wall that shields the lower portion of the cavity and an outer circumferential wall formed around the cavity. In the cavity of the housing, a click mechanism is obtained in which the click feel is accompanied by the rotation of the rotating body. The click mechanism has a click plate made of a metal plate and an elastic member made of a metal plate obtained by sliding the plurality of click generating portions formed on the click plate to obtain the click feel, and the elastic member rotates together with the rotating body. The click plate is arranged on the bottom wall of the housing and is pressed against the bottom wall by the elastic support force of the elastic member.

Moreover, as a 2nd means for solving the said subject, the said elastic member has the latching / release part which can be hooked or released to the said click generation part, and the said latching / release part of the said elastic member slides in the said click board. The sliding part which can be formed is formed, and the said sliding part is formed in multiple numbers by the said sliding part, The rotary switch of Claim 1 characterized by the above-mentioned.

Moreover, as said 3rd means for solving the said subject, the said click generating part of the said click board consists of a some hole part which penetrated the said sliding part at predetermined space | intervals, The said latching / release part of the said elastic member is the said hole It is characterized in that it is formed in a convex shape that can be hooked or released.

Moreover, as a 4th means for solving the said subject, in the said click board, the rotation prevention part is formed in the outer peripheral edge of the said sliding part, and this rotation prevention part can be engaged with the engaging part formed in the said outer peripheral wall of the said housing. Characterized as being done.

Moreover, as a 5th means for solving the said subject, the said elastic member is integrated in the one part embedded in the said rotating body, The said latching / release part is formed in a pair in the symmetrical position which interposes the rotation center of the said rotating body, It is characterized by being.

Moreover, as a 6th means for solving the said subject, the said rotating body has a pair of arm part extended in the symmetry direction across the rotation center, and the said elastic member has a part formed annularly by the said pair of arm part. It is embedded in the said, It is characterized in that it is integrated.

In addition, as a seventh means for solving the above problems, an inner circumferential region is formed on an inner circumferential side and an outer circumferential region is formed on an outer circumferential side in the cavity of the housing, and the fixed contact is disposed on the bottom wall of the inner circumferential region. The click plate is disposed on the bottom wall of the outer circumferential region, and a dustproof wall having a predetermined height is formed between the inner circumferential region and the outer circumferential region.

Moreover, as 8th means for solving the said subject, the recessed part is formed in the said bottom wall of the position which opposes the said click generating part which consists of the said hole part formed in the said click board at predetermined depth.

In addition, as a ninth means for solving the above problems, the concave portion is formed of an arc-shaped concave groove formed in the bottom wall at a position facing the click generation portion.

Moreover, as a tenth means for solving the said subject, the support shaft which protrudes upwards is formed in the center of the said bottom wall of the said housing, and is inserted in the said support shaft in the rotation center of the said rotating body which opposes the said support shaft. It is characterized in that the support hole is formed to be rotatable.

To practice the invention  Best form for

EMBODIMENT OF THE INVENTION Below, embodiment of the rotary switch of this invention is described based on drawing. First, when the rotary switch 1 of embodiment of this invention is demonstrated based on FIGS. 1-5, the housing 2 which consists of a resin material in which the external shape was formed in polygonal shape (for example, octagonal shape) is arrange | positioned at the lowest part. It is.

This housing 2 is surrounded by an outer circumferential wall 2a, and a hook-shaped hook portion 2b having a hook shape protrudes from four places on the outer circumferential surface of the outer circumferential wall 2a. The engaging part 2c which the rotation prevention part 7c and the bending part 7d of the click board 7 mentioned later can engage is provided in several places of the inner peripheral surface of the said outer peripheral wall 2a.

In addition, the housing 2 has a cavity 2e formed therein, the lower part of the cavity 2e is shielded by the bottom wall 3, and the upper part is opened. On the back surface of the bottom wall 3, as shown in Fig. 3, a positioning projection 2d for positioning on a substrate (not shown) such as an electronic device is formed.

On the bottom wall 3, an anti-vibration wall 3a having a predetermined height is formed in an annular shape, and the cavity portion 2e has an inner circumferential region 3b on the inner side and an outer circumferential region 3c on the outer side. Formed. In addition, a plurality of fixed contacts 4 are formed in the inner circumferential region 3b.

The fixed contact 4 is formed outside the inner circumferential region 3b in contact with the dustproof wall 3a, and a plurality of individual contacts 4a are formed adjacent to each other in the circumferential direction and annular on the inner circumferential side of the individual contacts 4a. The common contact 4b of is formed.

Moreover, on the bottom wall 3 of the outer periphery area | region 3c, the click board 7 mentioned later which consists of a metal plate is arrange | positioned.

That is, in the cavity 2e of the housing 2, it has the inner peripheral region 3b formed in the inner peripheral side, and the outer peripheral region 3c formed in the outer peripheral side, and the bottom wall 3 of the inner peripheral region 3b. The fixed contact 4 is arrange | positioned at it, and the click board 7 is arrange | positioned at the bottom wall 3 of the outer periphery area | region 3c, and the dustproof wall 3a of predetermined height between the inner periphery area | region 3b and the outer periphery area | region 3c. ) Is formed.

In addition, the individual contacts 4a and the common contacts 4b are insulated from each other and embedded in the bottom wall 3, extend outward from the outer circumferential wall 2a, and are connected to the plurality of external terminals 5.

Moreover, in the bottom wall 3 of the outer peripheral area 3c, the recessed part 3d which consists of an arc-shaped recessed groove at predetermined depth is formed in the circumferential direction, and the inner peripheral side which sandwiched this recessed part 3d and The click board receiving part 3e of the same height is formed in the outer peripheral side.

Moreover, the support shaft 6 of predetermined diameter dimension and height dimension protrudes in the center part of the bottom wall 3 inside the common electrode 4b.

Moreover, in the cavity part 2e of the housing | casing 2, the click mechanism which can acquire a click feel by rotating the rotating body 9 mentioned later is arrange | positioned. The click mechanism has a click plate 7 made of a metal plate having a predetermined thickness, and the click plate 7 is formed in an annular shape that can be mounted on the click plate receiving portion 3e of the outer circumferential region 3c of the housing 2. It is.

Moreover, the sliding part 7a in which the upper surface shown in figure which is one surface is formed in flat shape is formed in the click board 7. In the sliding portion 7a, a click generating portion 7b composed of a plurality of rectangular hole-shaped holes is punched through a predetermined interval in the circumferential direction.

Since the click generating part 7b which consists of the said hole part is punching from one surface (upper surface) side, the shear droop (shear surface) generate | occur | produces in the corner part of one surface side, Burrs (breaking surfaces) are formed on the other side (illustrated) side.

For this reason, the convex engaging / release part 10a of the elastic member 10 mentioned later can be hooked up or canceled | released to the click generation part 7b without difficulty, and a click feeling with favorable operation peeling can be obtained.

Moreover, the rotation prevention parts 7c and 7c protrude and are formed in the click board 7 in the two positions which oppose each other of the annular outer peripheral edge part, and predetermined one rotation prevention part 7c vicinity is predetermined to one direction of upper direction shown. A bent portion 7d bent at a height is formed.

And if the click board 7 is mounted on the click board receiving part 3e of the outer peripheral area 3c of the housing | casing 2, the rotation prevention part 7c will engage the engaging part 2c of the outer peripheral wall 2a. In this way, the movement in the rotational direction of the click plate 7 is regulated to prevent rotation.

In addition, since the bent portion 7d is bent in one direction, the front and back sides of the click plate 7 can be identified, and the click plate 7 can be chucked at the time of assembly.

Moreover, on the inner peripheral area 3b of the housing | casing 2, the 1st sliding element 8a which can contact and slide in contact with the common contact 4b, and the 2nd sliding which can slide in contact with the individual contact 4a are slid. The substantially annular movable contact 8 in which the element 8b was formed is arrange | positioned.

In the movable contact 8, attachment holes 8c and 8c are formed at two positions facing each other, and the attachment holes 8c and 8c are attachable to the rotating body 9.

In addition, the rotating body 9 is made of a resin material, the outer shape of which has a circular shape base 9a, a handle portion 9b protruding upward from the base 9a, and a rotation center (knob portion 9b). ), A pair of arm portions 9c and 9c extending from the base 9a in a symmetrical direction to a predetermined length are formed.

Further, arcuate protrusions 9d and 9d around the center of rotation of the rotating body 9 are formed at positions near the tip end of the pair of arm portions 9c and 9c, and the protrusions 9d and 9d. ), The frictional resistance between the holding member 11 and the rotating body 9 described later is reduced.

Moreover, as shown in FIG. 4, in the rotating body 9, the support hole 9e which is fitted to the support shaft 6 and is rotatable to the rotation center which opposes the support shaft 6 formed in the bottom wall 3 is rotatable. ) Is formed to a predetermined depth. Moreover, near the edge part of the arm part 9c, the elastic member 10 which is annular in the shape which consists of metal plates which have elasticity, such as a stainless steel plate, is embedded and fixed.

The annular elastic member 10 is shown below at a symmetrical position in a direction orthogonal to the extending directions of the arm portions 9c and 9c with the rotation center (the handle portion 9b) of the rotating body 9 interposed therebetween. The protrusion / release part 10a, 10a of the convex shape is protruded to the side. And the movable contact 8 is attached to the lower surface of the base 9a, and the rotating body 9 is comprised.

The rotating body 9 of such a structure places the latching / releasing parts 10a and 10a on the sliding part 7a of the click board 7, and opens the housing 2 with the holding member 11 mentioned later. When the upper part is shielded, the click plate 7 is pressed against the bottom wall 3 of the housing 2 by the elastic support force of the elastic member 10. At this time, when the rotating body 9 is rotated, the latching / releasing portion 10a latches or releases the rectangular hole-shaped click generating portion 7b to obtain a click feel of a predetermined size.

Moreover, above the rotating body 9, the holding member 11 which consists of a metal plate for holding the rotating body 9 with respect to the elastic support force of the elastic member 10 inside the cavity of a housing is arrange | positioned.

The holding member 11 has a shielding portion 11a having an approximately octagonal shape, and a handle portion 9b is inserted into a central portion of the shielding portion 11a so that the rotating body 9 can be freely rotated. The shaft hole 11b which can be formed is formed. Moreover, the locking part 11c which can be snap-fastened to the hook part 2b of the housing | casing 2 is formed in the outer peripheral edge part of the shielding part 11a at four positions of mutually opposing positions.

In the assembly of the rotary switch 1 of the present invention having such a configuration, the rotation preventing portion 7c is engaged with the engaging portion 2c of the housing 2 in a state in which the bent portion 7c of the click plate 7 is upward. ), The click plate 7 is mounted on the click plate receiving portion 3e of the bottom wall 3. Thereafter, the latching / releasing portion 10a of the elastic member 10 is positioned on the sliding portion 7a of the click plate 7 to mount the rotating body 9.

Then, the first sliding element 8a of the movable contact 8 is located on the common contact 4b, and the second sliding element 8b is located on the individual contact 4a.

Next, the holding member 11 is positioned on the rotating body 9, the handle 9b of the rotating body 9 is inserted into the shaft hole 11b of the holding member 11, and the system When the branch portion 11c is snap-locked to the hook portion 2b of the housing 2, the rotating body 9 is pressed downward by the holding member 11 in response to the elastic support force of the elastic member 10, and thus the elastic member The latching / unlocking portion 10a of the 10 presses the click plate 7 onto the bottom wall 3 of the housing 2.

At the same time, the first sliding element 8a of the movable contact 8 is elastically contacted with the common contact 4b, and the second sliding element 8b is elastically contacted with the individual contact 4a, thereby providing a rotary switch of the present invention. (1) is assembled.

In order to cope with thinning of the rotary switch 1 assembled in this way, the bottom wall 3 of the housing 2 is formed in thin, but the click plate 7 made of a metal plate on the bottom wall 3 is elastic. Since it is pressed and adhered by the member 10, even if the external terminal 5 is attached by reflow soldering to a substrate (not shown) of an electronic device such as a digital camera, the housing generated due to heat during soldering ( Deformation such as warpage or twist of 2) can be prevented. For this reason, it can be set as the rotary switch 1 which can be thinned. In addition, even if the click plate 7 or the elastic member 10 is worn and the metal powder is generated by the dustproof wall 3a formed between the inner circumferential region 3b and the outer circumferential region 3c in the housing 2, It is possible to reliably prevent the metal powder from entering the contact region of the inner circumferential region 3b. For this reason, the contact of the fixed contact 4 and the movable contact 8 can be made more reliable, and it can be set as the stable contact.

Moreover, in order to improve the sliding performance of the sliding part 7a of the click board 7 and the latching / release part 10a of the elastic member 10, lubricants, such as grease, are apply | coated to the upper surface of the sliding part 7a. Although this lubricant is prevented from flowing into the inner circumferential region 3b by the dustproof wall 3a.

In this operation of the rotary switch 1, when the operator rotates the handle portion 9b of the rotating body 9, the latching / release portion 10a of the elastic member 10 causes the sliding portion of the click plate 7 ( 7a) The image is slid, the click generating section 7b is engaged or released to generate a click feel.

As a result, the operator who rotates the handle 9b obtains the click feel, and in response to the click feel, the first sliding element 8a contacts / disconnects the plurality of individual contacts 4a so that the switch circuit Is switched.

That is, in conjunction with the switching of the switch circuit, the operator can obtain the click feel, and the operability is excellent.

The rotary switch 1 of the present invention is used, for example, in an electronic device such as a digital camera, and rotates the rotating body 9 to select a menu or the like displayed on the display, or to scroll. We can do it.

In addition, although the recessed part 3d formed in the bottom wall 3 was demonstrated in FIG. 1 as being annular of predetermined depth and width dimension, the click generate | occur | produces the click board 7 mounted on the bottom wall 3 A wave formed in a rectangular hole shape at a predetermined depth may be disposed at a position facing the portion 7b.

In addition, although the click generating part 7b of the click board 7 was punched and formed in the rectangular hole shape, it may be what made the sliding part 7a recessed below the figure in the shape concave to predetermined depth.

The click mechanism of the rotary switch of this invention has the elastic member which consists of the click board which consists of a metal plate, and the metal plate which obtains a click feeling by sliding the some click generation part formed in this click plate, This elastic member rotates with a rotating body Since the click plate is disposed on the bottom wall of the housing and is pressed to the bottom wall by the elastic support force of the elastic member, the click plate is pressed against the bottom wall by the elastic member, such as a reflow solder or the like. The deformation of the housing due to heat can be prevented. For this reason, the exclusive member for preventing deformation of a housing becomes unnecessary. In addition, since both the elastic member and the click plate are metal plates, wear of each other can be reduced and a long life rotary switch can be provided.

In addition, the elastic member is provided with a latching / releasing portion capable of engaging or releasing the click generating portion, and a sliding portion capable of sliding the latching / releasing portion of the elastic member is formed in the click plate, and a plurality of click generating portions are formed in the sliding portion. Therefore, the engaging / releasing portion of the elastic member can securely obtain a click feel by engaging or releasing a plurality of click generating portions of the click plate.

In addition, since the click generating portion of the click plate is formed of a plurality of holes formed through the sliding portions at predetermined intervals, and the latching / release portion of the elastic member is formed in a convex shape that can be hooked or released from the holes, it is made of holes. Since the click generating part is connected to the sliding part, the rigidity of the click plate can be increased, and the deformation of the housing can be prevented more surely. Further, since the convex hanging / unlocking portion is hooked or released in the hole portion, a more reliable click feel can be obtained.

Moreover, since the rotation prevention part is formed in the outer peripheral edge of a sliding part in this click board, and this rotation prevention part can be engaged with the engaging part formed in the outer peripheral wall of a housing, a click board can be reliably prevented from rotating.

In addition, since the elastic member is embedded in the rotating body and integrated, the pair of hanging / release portions are formed in a symmetrical position with the rotation center of the rotating body interposed therebetween, so that the click plate is balanced by the pair of hanging / release portions. The elastic support can be favorably and evenly.

In addition, the rotating body is provided with a pair of arm portions projecting in the symmetrical direction with the rotational center interposed therebetween, and the elastic member has an elastic member attached to the outer circumference of the rotating body because a portion formed in an annular shape is embedded in the pair of arm portions. While being able to arrange | position, an elastic member can be embedded in the thickness of a rotating body. For this reason, thickness reduction is possible.

In the cavity of the housing, there is an inner circumferential region formed on the inner circumferential side and an outer circumferential region formed on the outer circumferential side, and fixed contacts are disposed on the bottom wall of the inner circumferential region, and a click plate is disposed on the bottom wall of the outer circumferential region. Since a dustproof wall of predetermined height is formed between the inner circumferential region and the outer circumferential region, it is possible to prevent mixing of the contact grease applied to the fixed contact point and the lubricating grease applied to the click plate.

In addition, even if the click plate or the elastic member is worn and the metal powder is generated, the metal powder can be prevented from entering the contact region of the inner circumferential region.

In addition, since the concave portion is formed at a predetermined depth in the bottom wall of the outer circumferential region at a position facing the click generating portion made of the hole formed in the click plate, the convex hanging / release of the convex shape engaged with the click generating portion made of the hole is formed. In addition, even if it protrudes from a click generation part, it can be prevented from touching a bottom wall.

Moreover, since the recessed portion is formed of an arc-shaped recessed groove formed in the bottom wall at the position opposite to the click generation portion, it is easy to manufacture a molding die for manufacturing the housing.

Moreover, since the support shaft which protrudes upward is formed in the center part of the bottom wall of a housing, and the support center which is rotatably fitted and rotated in the rotation center of the rotating body which opposes a support shaft, Eccentricity can be prevented.

Claims (10)

A housing having a rotatable rotatable body, a cavity for rotatably accommodating a part of the rotatable body, a fixed contact disposed in the cavity, and a movable contact attached to the rotatable body and capable of contacting / detaching to the fixed contact. And a holding member for shielding the cavity portion of the housing and holding the rotatable body in the rotatable operation. The housing has a bottom wall that shields the lower portion of the cavity and an outer circumferential wall formed around the cavity. In the cavity of the housing, a click mechanism is obtained in which the click feel is accompanied by the rotation of the rotating body. The click mechanism has a click plate made of a metal plate and an elastic member made of a metal plate obtained by sliding the plurality of click generating portions formed on the click plate to obtain the click feel, and the elastic member rotates together with the rotating body. And the click plate is disposed on the bottom wall of the housing and is pressed against the bottom wall by the elastic support force of the elastic member. The method of claim 1, The elastic member has a latching / releasing portion capable of hanging or releasing the click generating portion, and a sliding portion for sliding the latching / releasing portion of the elastic member is formed in the click plate, and the sliding portion The rotary switch characterized by the above-mentioned. The method of claim 2, The click generating portion of the click plate is formed of a plurality of hole portions formed through the sliding portion at predetermined intervals, and the latching / release portion of the elastic member is formed in a convex shape that can be hooked or released from the hole portion. Rotary switch characterized in that there is. The method of claim 2, The click plate has a rotation preventing portion formed on an outer circumferential edge of the sliding portion, and the rotation preventing portion can engage with a engaging portion formed on the outer circumferential wall of the housing. The method of claim 2, The elastic member is partially embedded in the rotating body and integrated, and the hooking / release portion is formed in a pair in a symmetrical position with the rotation center of the rotating body interposed therebetween. The method of claim 5, The rotating body has a pair of arm portions formed extending in the symmetrical direction with the rotation center interposed therebetween, and the elastic member has a portion formed in an annular shape that is embedded in the pair of arm portions and is integrated with the rotary body. switch. The method of claim 1, In the cavity of the housing, an inner circumferential region and an outer circumferential region are formed on an inner circumferential side, and the fixed contact is disposed on the bottom wall of the inner circumferential region, and the click plate is formed on the bottom wall of the outer circumferential region. And a dustproof wall having a predetermined height formed between the inner circumferential region and the outer circumferential region. The method of claim 4, wherein And a concave portion is formed at a predetermined depth in the bottom wall at a position facing the click generating portion formed of the hole formed in the click plate. The method of claim 8, And the concave portion is formed of an arc-shaped concave groove formed in the bottom wall at a position facing the click generation portion. The method of claim 1, A support shaft protruding upward is formed at the center of the bottom wall of the housing, and a support hole rotatably fitted to the support shaft is formed at a rotation center of the rotating body facing the support shaft. Rotary switch.

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