TWI321799B - - Google Patents

Description

[Technical Field] The present invention relates to a rotary switch which can switch a menu displayed by a display device such as a video camera. [Prior Art]

The conventional rotary switch is described by, for example, a patent document. The rotary switch 30 disclosed in Patent Document 1 is provided with a casing 31 made of a resin material at the lowermost portion as shown in Figs. 6 and 7 . The body 31 is formed with a base portion 31c having a cylindrical support portion 3u and a receiving portion 3 lb having a substantially annular shape on the lower end side of the support portion 31a. The base portion 31c is outwardly led out to form an opening 31 (1, and the fixed terminal portion 32 is disposed on the opening 31d. Further, the fixed terminal portion 32 is a base 32a made of an insulating material. And a plurality of connection terminals 32b extending from one end side of the base 32& and a plurality of connection terminals 32b are embedded in the base 32& and protrude from the other end side of the base 32& Further, a plurality of sliders 32c are connected to each other. Further, a circuit board 33 made of a resin material is disposed in the housing portion 31b of the screaming body 31, and the circuit board 33 is formed with a support of the housing 31 at the center thereof. a plug-in through hole 33a and having an outer shape formed in an annular shape. Further, in the circuit board 33, a plurality of female contact portions (not shown) that slide with the slider 32c are formed on the lower surface thereof, and The circuit board 33 is fixed to the lower surface of the rotating body. Further, since the circuit board 33 slides with respect to the slider 32c and the rotation of the rotating body 34 rotates, the switching circuit is switched. 116055.doc 1321799 Resin material is formed and can be inserted A cylindrical rotating shaft portion 34a that rotates in the support portion 31a of the body 31. Further, a meandering base portion 34b accommodated in the housing portion 31b of the housing 31 is formed on the lower end side of the rotating shaft portion 34a. The lower surface of the base portion 34b is fixed with the circuit board 33 by an adhesive or the like. Further, a plurality of grooves 34c are formed in the circumferential direction on the inner peripheral portion of the upper surface of the base portion 34b, and in the groove 34. (The outer peripheral region is formed with a flat auxiliary spring support portion 34d. Further, a substantially annular spring member 35 is disposed on the recess 34c, and the spring member 35 is formed at a position opposite to each other. The pair of flat portions 35a' are formed with the caulking holes 35b in the flat portions 35', and the 'spring members 35' are formed with the elastic portions 35c whose both end portions are bent into a substantially V shape with the flat portions 35a as a boundary. A convex portion 35 that can be engaged with and disengaged from the recess 34c is formed in the center of one end side of the elastic arm portion 35c. (1) A free end-shaped auxiliary spring portion 35e is formed, which is outward from the vicinity of the convex portion Extended, and is substantially along the arc of the elastic wrist 35c Further, a frame hole 36a in which the rotating shaft portion 34a of the rotating body 34 is inserted is formed on the frame % made of a metal plate disposed on the upper portion of the spring member 35, and a pair of mounting holes 36b are formed for The spring member 35 is attached to the lower surface of the frame. Further, the rivet 37 is inserted and riveted in a state where the staking hole 35b of the spring member 35 is overlapped with the mounting hole 36b, whereby the spring member 35 is fixed to the frame 36. 116055.doc 1321799 Further, a plurality of fastening pieces 36c for riveting and being attached to the casing 31 are formed on the frame 36, and a substrate mounted on an electronic device or the like by reflow soldering or the like (not shown) ) Mounting foot 36d. In the above-described conventional rotary switch, the fastening piece 36C of the frame 36 is caulked to the casing 31 and assembled. The mounting leg 36d of the frame % protruding from the casing n to the lower side of the figure can be attached to an electronic device or the like by reflow soldering or the like. On the substrate. In the operation of the prior rotary switch of the above configuration, if the knob (not shown) mounted on the rotary shaft portion 34a of the rotary body 34 is first rotated, the rotary body 34 is centered on 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 a contact portion (not shown) formed on the circuit board 33 slides in contact with the slider 32c of the fixed terminal portion 32 to perform switching. Switching. Further, as shown in Fig. 8, the rotating body 34 is rotated, and the free end portion of the auxiliary spring portion 35e slides in a state of abutting against the flat auxiliary spring supporting portion, and the groove 34c of the rotating body 34. The convex portion 35d of the spring member 35 is engaged and disengaged, thereby obtaining a click feeling. That is, the ratchet mechanism is constituted by the recess 34c of the rotary body 34 made of a resin material and the convex portion 35d of the spring member 35 made of a metal plate, whereby the click feeling can be obtained. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2002-110002 [Problems to be Solved by the Invention] However, the conventional rotary switch has a thin wall when responding to recent thinning requirements, The heat when reflow soldering or the like is mounted on a substrate of an electronic device or the like may cause a problem such as a warp or distortion of the thin-walled casing 31. Therefore, the prior rotary switch must have a dedicated member for preventing deformation of the housing. Further, since the rotating body 34 is formed of a resin material and the spring member 35 is formed of a metal plate, the groove Wc of the rotating body 34 as the ratchet mechanism and the convex portion 35d of the spring member 35 are repeatedly engaged and disengaged from the groove 34c. The corner portion is reduced in wear, and thus the life of the rotary switch is shortened. Further, since the groove 34 is cut, abrasion powder such as resin powder is generated, and the abrasion powder adheres to the contact portion of the slider 32c or the circuit board 33, which may cause a conduction failure of the switch or the like. The present invention has been made in order to solve the above problems, and an object of the invention is to provide a rotary switch having a long life, which does not cause deformation such as warping when the casing is made thinner, and which reduces wear of the ratchet mechanism. SUMMARY OF THE INVENTION As a third method for solving the above problems, a rotary switch of the present invention is characterized by comprising: a rotatable rotating body; and a housing having a housing that can be rotatably accommodated a hollow portion; a fixed contact disposed in the hollow portion; a movable contact attached to the rotating body and separable from the fixed contact; and a holding member shielding the cavity portion of the housing, and The rotating body is held in such a manner as to perform the above-described rotating operation, and the casing has a bottom wall that shields the lower portion of the hollow portion and a peripheral wall that is formed around the hollow portion in the hollow portion of the casing. a ratchet mechanism for obtaining a click feeling with the rotation of the rotating body, the ratchet mechanism having a pawl plate including a metal plate and a 116055. doc member including a metal plate, the elastic member being formed on the pawl plate The plurality of card answer generating portions are slid to obtain the card touch feeling, and the elastic member is rotatable with the slave body, and the pawl plate is disposed on The bottom wall of the casing is biased by the bottom wall to the biasing force of the elastic member. In the second aspect of the present invention, the rotary switch according to the second aspect of the present invention is characterized in that the elastic member is formed with a snap fit that can be engaged with and disengaged from the card β generating portion. The detaching portion is formed on the pawl plate to form a sliding portion in which the engaging and disengaging portion of the elastic member is slidable, and a plurality of the card generating portions are formed on the sliding portion. Further, as a third method for solving the above-mentioned problem, the above-described click generating portion of the pawl plate is formed by a plurality of holes formed by penetrating the sliding jaw at a predetermined interval. The engaging and disengaging portion is formed in a convex shape that can be engaged with and disengaged from the hole portion. X is a fourth method for solving the above problem, characterized in that, on the t pawl plate, a rotation stop portion is formed on a periphery of the sliding portion, and the rotation preventing portion can be formed on the outer periphery of the casing. The fastening portion of the wall is fastened to 0. In order to solve the above problem, the elastic member is partially buried in m./, and is characterized in that it is separated from the slave body and is separated from the body. A pair is formed at a position symmetrical with respect to the center of rotation of the rotating body. The above-mentioned iir is a sixth method for solving the above problem, wherein the red-rotating body has a pair of arm portions which are symmetrical with respect to the center of rotation, and the elastic member. The shape of the body is formed in a part of %. 116055.doc 1321799 The pair of arms are buried as described above to form the unitary body. Further, a seventh method for solving the above-mentioned problem is characterized in that an inner peripheral region is formed on the inner peripheral side of the hollow portion of the casing, and an outer peripheral region 'in the inner peripheral region is formed on the outer peripheral side. The fixed contact is disposed on the bottom, and the pawl plate is disposed on the bottom of the outer peripheral region, and a dustproof wall having a specific height is formed between the inner peripheral region and the outer peripheral region. Further, as a eighth method for solving the above-mentioned problems, a concave portion having a specific depth is formed on the bottom wall at a position facing the click generating portion, and the click generating portion is formed. The hole portion is formed on the pawl plate. Further, a ninth method for solving the above-mentioned problem is characterized in that the concave portion is constituted by an arcuate groove formed in the bottom wall at a position facing the card generating portion. Further, as a first method for solving the above-mentioned problems, a support shaft that protrudes upward is formed in a center portion of the bottom wall of the casing, and the rotation is opposite to the support shaft. The center of rotation of the body is formed with a support hole that is rotatable in engagement with the support shaft. [Effect of the Invention] The ratchet mechanism of the rotary switch of the present invention has a pawl plate composed of a metal plate and an elastic member composed of a metal plate, and the elastic member can be generated in a plurality of cards formed on the pawl plate The sliding portion obtains a card touch feeling, and the elastic member is rotatable together with the rotating body, and the pawl plate is disposed on the bottom wall of the casing, and is pressed by the elastic member to press against the bottom wall, thereby .doc -11 · 1321799 The pawl plate that presses the elastic member against the bottom wall prevents deformation of the casing caused by heat such as reflow soldering. Therefore, a dedicated member for preventing deformation of the casing is not required. Further, since both the elastic member and the pawl plate are metal plates, it is possible to provide a rotary switch which can reduce mutual wear and have a long life. Further, in the 'elastic member', a snap-off portion that can be engaged with and released from the card-receiving portion is formed, and on the pawl plate, a sliding portion in which the snap-off portion of the elastic member is slidable is formed, and is formed on the sliding portion Since a plurality of card answers generate the φ portion, the snap-off portion of the elastic member is disengaged from the plurality of card-receiving portions of the pawl plate, and the card touch feeling can be reliably obtained. Further, since the click generating portion of the pawl plate is formed by a plurality of holes formed by penetrating the sliding portion at a predetermined interval, and the engaging and disengaging portion of the elastic member is formed in a convex shape that can be engaged with and disengaged from the hole portion, The card-receiving portion formed by the hole portion is connected by the sliding portion, so that the rigidity of the pawl plate can be improved, thereby preventing more reliable deformation of the casing. Further, since the convex engaging and disengaging portion is engaged with the hole portion, a more reliable card touch feeling can be obtained. # Further, since the rotation preventing portion is formed on the outer periphery of the sliding portion on the pawl plate, and the rotation preventing portion can be engaged with the engaging portion formed on the outer peripheral wall of the casing, the pawl plate can be made Stop the rotation reliably. Moreover, since the elastic member is embedded in the rotating body, the body is formed and fastened.

Since the disengagement portion is formed in a pair at a position symmetrical with respect to the center of rotation of the interlacing rotating body, the decoupling and disengaging portion can be balanced and elastically biased to the pawl plate in a uniform manner. Further, since the pair of arms projecting in the direction of the symmetry of the sandwich rotation is formed on the rotating body, and the elastic member is formed as a ring portion 116055.doc 12 1321799 is embedded in the pair of arms portion An elastic member is disposed on the outer circumference of the rotating body, and the elastic member can be embedded in the thickness of the rotating body. Therefore, it is possible to achieve thinning. Further, in the hollow portion of the casing, there are an inner peripheral region formed on the inner peripheral side and a peripheral region formed on the outer peripheral side, and a fixed joint is disposed on the bottom wall of the inner peripheral region at the bottom of the outer peripheral region. A pawl plate is disposed on the wall, and a dustproof wall of a specific height is formed between the inner peripheral region and the outer peripheral region, thereby preventing muddy oil applied to the joint of the fixed joint and lubrication applied to the pawl plate Mixed with lubricating oil. Further, when the metal powder is generated when the pawl plate or the elastic member is worn, the metal powder can be prevented from intruding into the contact region of the inner peripheral region. Further, since a concave portion having a certain depth is formed at a position facing the click generating portion on the bottom wall of the outer peripheral region, the click generating portion is constituted by a hole formed in the pawl plate, and thus The convex engagement disengagement portion that is engaged by the card-receiving portion formed by the hole portion can prevent the bottom wall from coming into contact with the card-receiving portion (4). Further, since the concave portion is constituted by an arcuate groove formed on the bottom wall at a position opposite to the card generating portion, it is easy to manufacture a molding die for the two body. Further, a support shaft that protrudes upward is formed at a central portion of the bottom wall of the casing, and a support hole that is rotatable with the support shaft is formed at a center of rotation of the rotating body opposite to the support vehicle, Therefore, the eccentricity of the rotating body can be prevented. [Embodiment] 116055.doc 1321799 / hereinafter, the embodiment of the rotary switch of the present invention will be described based on the drawings. First, the embodiment of the present invention will be described with reference to FIGS. 1 to 5 . The rotary switch 1' has an outer shape formed into a capacity, and the housing 2 made of a resin material is disposed at the lowermost portion of the small-sized (e.g., octagonal).

The periphery of the casing 2 is surrounded by the outer peripheral wall 2a, and a hook-shaped hook portion is formed to protrude from four portions of the outer peripheral wall 2a. A plurality of portions of the inner peripheral surface of the outer peripheral wall 2a are formed with a fastening portion 2c that can be engaged with the following pawl plate 7 and the hinge portion 7c and the hinge portion 7d. Further, the casing 2 has a hollow portion formed therein, and the lower portion of the hollow portion 2e is shielded by the bottom wall 3 and opened upward. On the back surface of the bottom wall 3, as shown in Fig. 3, positioning projections 2d for positioning on a substrate (not shown) such as an electronic device are formed to protrude. a dust-proof wall having a certain height is formed in the bottom wall 3, and an inner peripheral portion 3b is formed on the inner side of the hollow portion, and a plurality of solid-hole portions 2e are formed in the inner peripheral portion 3b to sandwich the dust-proof wall 3& The peripheral portion 3c is formed, and the fixed contact 4 is formed. The fixed contact 4 is formed by a plurality of individual contacts 4a adjacent to each other in the outer peripheral/sigma circumferential direction of the inner peripheral region connected to the dustproof wall 3a, and A ring-shaped common contact is formed on the inner peripheral side of the individual contact 4a. Further, on the bottom wall 3 of the outer peripheral portion 3C, a following pawl plate 7 made of a metal plate is disposed. The hollow portion 2e of the body 2 has an inner peripheral region 3b formed on the inner peripheral side and an outer peripheral region 3c formed on the outer peripheral side, and a fixed contact 4' is disposed on the outer peripheral wall of the inner peripheral region hole. The bottom wall 3 of the region 3c is provided with H6055.doc • 14 -. Further, the pawl plate 7 is formed with a dustproof wall 3a of a specific height between the inner peripheral region 3b and the outer peripheral region 3c. Further, the individual contacts 4a and The common contacts 4b are respectively insulated and embedded in the bottom wall 3 and project outward from the outer peripheral wall 2a, and a plurality of external portions Further, in the bottom wall 3 of the outer peripheral region 3c, a recessed portion 3d formed by an arc-shaped recess is formed in the circumferential direction at a specific depth, and the inner peripheral side and the outer peripheral side of the recessed portion h are interposed therebetween. 'The pawl plate supporting portion b having the same height is formed on the inner side of the through-hole 4b and the bottom wall 3, and the support shaft 6 having a specific radial dimension and height dimension is formed to protrude. A ratchet mechanism is provided in the hollow portion 2e of the second portion, and the ratchet mechanism can obtain a click feeling by rotating the rotating body 9. The ratchet mechanism has a pawl plate 7 made of a metal plate of a specific thickness. The pawl plate 7 is formed in an annular shape and can be placed on the pawl plate supporting portion 3e of the outer peripheral portion of the casing 2. Further, the pawl plate 7 is provided with an upper surface as an illustration of one side. The flat sliding portion 7ae is punched at a predetermined interval in the circumferential direction at the sliding portion 7ae, and is formed by a plurality of card-shaped generating portions 7b formed by a plurality of square-hole-shaped holes. The generating portion 7b is press-formed from one side (upper surface shown) Therefore, a sag is formed at the corner of one side (the cross section is cut and a burr (broken section) is formed on the side of the other side (the lower surface is shown). Therefore, the following elastic member 1 can be snap-fitted. Since the disengagement unit i〇a and the card-receiving unit 7b are properly engaged and disengaged, it is possible to obtain a feeling of touch with a feeling of good operation. The pliers board 7 is opposite to each other on the outer peripheral edge of the ring. At two positions of the position, the transitions P7c and 7c are formed in a protruding manner, and a hinge portion 7d which is hinged at a certain height in one direction is formed in the vicinity of the rotation stop portion: /c. Further, when the pawl plate 7 is placed on the pawl plate support 43e of the outer peripheral portion of the casing 2, the rotation preventing portion is engaged with the outer peripheral wall by the engaging portion, and the pawl plate 7 is The movement in the direction of rotation is restricted and stopped. Since the hinge f 7d is hinged in the - direction, the inner surface and the front and back of the pawl plate 7 can be identified and the pawl plate 7 can be clamped during assembly. Further, a substantially annular movable joint is disposed on the inner peripheral portion 3b of the casing 2, and the upper movable member is formed into a lunar member 8a which can slide against the common joint and can be connected to the individual The second slider 8 b that slides in contact with the clicker is formed with mounting holes 8e and 8e at two positions on the movable contact 8 at positions facing each other. The mounting Wei and 8e can be mounted on the rotating body. 9 on. The 'rotating body 9' is made of a resin material, and is formed with a circular outer shape. The base portion 9a' protrudes upward from the base portion 93, and is symmetrical from the base portion 9a to the center of rotation (the knob portion is complemented). One of the pair of arms 9c, 9c projects in a particular length in the direction. Further, at a position close to the front end portion of the pair of arm portions 9c and 9c, a round fox-like ridge portion 1 centering on the rotation center of the rotator 9 is formed, and the δ 玄 & strip portions 9d and 9d can be reduced. Xiaoxia Cheng _ i main 4 to the frictional resistance. Between the phantom lower core holding structure (4) and the rotating body 9 1 J6055.d〇c 16 1321799 The slewing body 9 is shown in FIG. 4, in the center of rotation opposite to the support shaft 6 formed on the bottom wall 3, A support hole 9e that is rotatable in engagement with the support weir is formed at a specific depth. Further, at the end portion of the arm portion %, the embedded plate is formed into a ring shape, and the annular elastic member 1G is extended from the rotating core (the knob portion 9b) of the clip (four) swivel 9 and the arm portions 9e, 9e. Symmetrical position in the direction orthogonal to the direction

At the lower side of the figure, a convex engagement and disengagement center is formed, and a movable contact 8 is attached to the lower surface of the base 9a to constitute the rotary body 9.

Further, an elastic member 1 具有 having an elastic metal shape such as a stainless steel plate is fixed. In the rotating body 9 of the above configuration, if the engaging and disengaging portion 1 is placed at the sliding portion of the pawl plate 7, and the holding member n is used to shield the upper portion of the casing 2, the spine is used. The claw plate 7 is pressed against the bottom wall 3 of the casing 2 by the urging force of the elastic member 1''. At this time, when the rotating body 9 is rotated, the engaging and disengaging portion 10a is engaged with the square hole-shaped click generating portion 7b, thereby obtaining a card touch feeling of a specific size. Further, a holding member 11' made of a metal plate is disposed above the rotating body 9. The holding member 11 holds the rotating body 9 inside the cavity of the casing against the urging force of the elastic member 10. The sinus holding member 11 has a shielding portion 11a having a substantially octagonal shape, and a knob portion 9b is inserted in the central portion of the shielding portion 1a to form a shaft hole lib that rotatably supports the rotating body 9. Further, at the peripheral portion of the shielding portion iia, at four positions facing each other, a locking portion iic engageable with the fishing portion 2b of the casing 2 is formed. 116055.doc • 17- With the above-described configuration of the rotary type assembly of the present invention, the rotation preventing portion 7c is buckled with the engaging portion 2c of the casing 2 in a state in which the hinge 7c of the pawl is directed upward. The pawl plate 7 is placed on the pawl plate supporting portion 3e of the bottom wall 3. Then, on the sliding portion 73 of the pawl plate 7, the engaging and disengaging portion 1 〇a of the elastic member 1 is aligned to mount the rotating body 9. Therefore, the i-th slider 8a of the movable contact 8 is located on the common contact keeper, and the second slider 8b is located on the individual contact 4a. Next, the holding member 11 is placed on the rotating body 9, and the red portion 9b of the rotating body 9 is inserted into the shaft hole m of the holding member u, and the locking portion mountain is engaged with the fishing portion 21) of the casing 2 to be locked. Then, the rotating body 9 is subjected to the holding member against the urging force of the elastic structure (4)! ! Pressing downward, the engaging and disengaging portion l〇a of the elastic member 1 presses the pawl plate 7 toward the bottom wall 3 of the casing 2. At the same time, the first slider 8a of the movable contact 8 is in elastic contact with the common contact, and the second slider 8b is elastically contacted with the individual contacts ,, thereby assembling the rotary switch 1 of the invention. In order to reduce the thickness, the rotary switch 如此 assembled in this manner has a bottom wall 2 3 φ of the casing 2 being thin, but since the pawl plate 7 made of a metal plate is pressed against the elastic member 10 and adhered to the bottom wall 3, Therefore, when the external terminal 5 is attached to a substrate (not shown) of an electronic device such as a video camera by reflow soldering, deformation such as warpage or distortion of the casing 2 due to heat during soldering can be prevented. Therefore, it is possible to form a rotary switch that can be made thinner. Further, in the casing 2, the dust-proof wall 3a formed between the inner peripheral region 3b and the outer peripheral region hole can reliably prevent the metal even if the ratchet plate 7 or the elastic member 1 is worn to generate metal powder. The powder invades the contact area of the inner peripheral region 3b. Therefore, the contact between the fixed contact 4 and the movable contact 8 can be made more reliable, so that a stable contact can be formed. The portion 7 of the sliding portion 7 is interlocked with the elastic member 10, and the upper surface of the sliding portion 73 is coated with lubricating oil = and the lubricant can flow into the inner peripheral body 9 by the dustproof wall. The operation of the rotary switch 1 is rotated, and the operator rotates the rotary plate 7 to operate. At the time of P9b, the engaging and disengaging portion of the elastic member 1 is slid on the sliding portion 7a of the pawl plate 7, and the click feeling is clicked. . card. The b-engagement is generated to cause the operator to obtain the card touch feeling by the 'rotation operation', and the touch-sensitive touch-the first slider ^ and the plurality of individual contacts 乜 contact the knife to switch Switching of the circuit.

That is, the operator can handle the special sense of the sensation, so that the operability of the switch circuit is switched. The rotary switch 1 of the present invention is used, for example, in an electronic device such as a video camera: by the rotation operation of the rotary body 9. The menus displayed on the display device, etc. can be selected or scrolled. Further, it has been explained that the recess 3d formed on the bottom wall 3 is an annular recess having a specific depth and width dimension in the figure, and may also be on the card placed on the bottom wall 3 = the pawl plate 7. The generating portion 7b is formed in a square shape in the opposite direction. At the location, dig into a specific depth

Further, it has been described that the + of the pawl plate 7 is burned; $: 丄 A is not formed, and the pole/key portion is formed by stamping, and the sliding portion 7a can be recessed to a specific depth below the figure to form a concave U6055.doc 19 1321799 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of a rotary switch of the present invention. Figure 2 is a plan view of the rotary switch of the present invention. Figure 3 is a side view of Figure 2. Figure 4 is a cross-sectional view taken along line 4-4 of Figure 2. Figure 5 is a 5 - 5 cross-sectional view of Figure 2. Figure 6 is an exploded perspective view of a prior rotary switch. Fig. 7 is an enlarged view of a main part of a rotary body of the prior rotary switch. Figs. 8A and 8B are cross-sectional views showing main parts of the relationship between the rotating body of the prior rotary switch and the convex portion of the spring member. [Description of main component symbols] 1 2 2a 2b 2c 2d 2e 3 3a 3b 3c 3d 3e Rotary switch housing outer peripheral wall hook portion fastening portion positioning projection cavity bottom wall dust wall inner peripheral region outer peripheral region concave portion 116055.doc Pawl plate support -20- 1321799 4 Fixed contact 4a Individual contact 4b Common contact 5 External terminal 6 Support shaft 7 Pawl plate 7a Slide portion 7b Card-receiving portion 7c Rotation portion 7d Reaming portion 8 Point 8a First slider 8b Second slider 8c Mounting hole 9 Rotating body 9a Base portion 9b Rotating portion 9c Arm portion 9d Lamb portion 9e Supporting hole 10 Elastic member 10a Knocking and disengaging portion 11 Holding member 11a Shading portion 116055.doc -21 1321799 lib shaft hole 11c locking portion

116055.doc -22

Claims (1)

'Patent scope: A rotary switch characterized by comprising: a rotatable rotating body; a housing having a cavity portion rotatably receiving the rotating body portion; and a fixed contact disposed in the cavity portion a movable contact attached to the rotating body and separable from contact with the fixed contact; and a holding member 'which shields the upper portion of the cavity of the casing to perform the rotating operation to hold the rotating body, the casing The body has a peripheral wall surrounding the hollow portion below the cavity portion, and a ratchet mechanism for obtaining a click feeling with the rotation of the rotating body is disposed in the upper core 2 of the casing. The ratchet mechanism has a pawl plate including a metal plate and an elastic member including a metal plate. The elastic member is slidable at a plurality of card-receiving portions formed on the pawl plate to obtain the click feeling of the card, and the elastic member is rotatable with the above The body-spinning, the pawl plate is disposed on the bottom wall of the casing, and is pressed by the bottom wall by the force of the elastic member Pressure. In the rotary switch of the requester, the engaging member is formed on the elastic member, and the engaging and disengaging portion is engageable with the card generating portion, and the engaging member is formed on the pawl plate a slidable sliding portion' and a plurality of the card generating portions are formed on the sliding portion. The rotary opening generating unit of claim 2 includes a plurality of holes formed by the predetermined sliding portion, wherein the card member of the pawl plate passes through the sliding portion, and the elastic member is engaged and disengaged from the hole portion. shape. The '1 ° & detachment portion is formed as a rotary switch as claimed in claim 2, wherein the outer periphery of the sliding portion is formed with &卩' 5 止 止 部 部 可 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Between the above-mentioned rotating body, the above-mentioned engaging and disengaging portion is formed at a position symmetrical with respect to the center of rotation of the attacking and rotating body, and has a %-turn switch as claimed in claim 5, ,,, One of the pair of arm portions is formed by extending the center and the symmetrical square A, and the elastic member is formed into a work-up, and a garment-like portion P is embedded in the pair of arm portions to form the integration. 7. In the case of the rotary switch of the requester, an inner peripheral region is formed on the inner peripheral side of the cavity in the casing, and an outer peripheral region is formed on the outer peripheral side on the bottom wall of the inner peripheral region. In the above-described fixing, the dustproof wall having the specific height formed between the inner peripheral region and the outer peripheral region is disposed on the bottom wall of the outer peripheral region. 8. The spine type pq of claim 4, wherein the bottom wall of the position opposite to the card answer generating portion is formed with a recess of a specific depth, and the card generating Dp is formed by The above hole portion on the pawl plate. 9. The rotary type of claim 8, wherein the concave portion (four) of the towel has an arc shape formed on the bottom wall at a position opposite to the card generating portion, IJ6055.doc 1321799 Constructed by grooves. 10. The rotary switch according to claim 1, wherein a support shaft that protrudes upward is formed at a center portion of the bottom wall of the casing, and a rotation center of the rotating body that faces the support shaft is formed. A support hole that can be rotated in engagement with the support shaft. 116055.doc