JP2007328974A - Rotary electrical component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electrical component wherein a good clicking feel can be obtained when rotationally operating an operating shaft. <P>SOLUTION: This rotary electrical component is equipped with a case 1 having a bearing part 1b, a rotary member 3 the operating shaft 3a of which is rotatably held by the bearing part 1b, an elastic member 2 having a projecting first cam part 2b at the tip of an arm part 2a which is held by the case 1 and is capable of elastic deformation, a projecting and recessed second cam part 3d engaged with the first cam part 2b to generate the clicking feel, a conductor plate 4 engaged with the rotary member 3 while having a first conductive part and rotated along with rotation of the rotary member 3, and a housing 5 having a second conductive part to output an electrical signal by slidably making contact with the conductor plate 4 in a housing part 5a, and when the operating shaft 3a is rotated, the first cam part 2b engaged with the projecting and recessed second cam part 3d is provided so that it can elastically displace in the rotating direction of the rotary member 3 perpendicular to the elastically displacing direction of the arm part 2a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary electric component that is used in various electric devices and switches various modes by a rotation operation, and more particularly to a click mechanism that generates a click feeling during a rotation operation.

  The structure of a conventional rotary electric component includes a base, a rotor housed in the base so as to be rotatable, an operating shaft (cylindrical portion) that rotates the rotor, and a housing that covers the opening of the base. The rotor is rotated by rotating the operation shaft, and the movable contact plate provided on the rotor slides on the fixed contact piece provided on the base so that a desired signal is output. It is known (see, for example, Patent Document 1).

  The structure of this conventional rotating electrical component is shown in FIGS. FIG. 6 is a fragmentary plan view of a main part of a conventional rotating electrical component, and FIG. 7 is an exploded perspective view of the same.

  In the figure, the rotary electric component has a cantilever-like fixed contact piece 52 exposed on a plurality of concentric circles on the upper surface of the base 51, and a plurality of annular rings on the lower side of the lower surface of the substantially disk-shaped rotor 57. The concave portion 54 of the base 51 and the rotating shaft of the rotor 57 are rotatably fitted, and the rotor 57 is rotated by the rotating operation of the operating shaft (cylindrical portion) 56. The contact of the movable contact plate 55 that slides on and off contacts and separates from the fixed contact piece 52 so that the switch is turned on / off.

  A bent portion 61-1 of a metal elastic member 61 having a pair of elastic arm portions 61-2 is fixed to the groove 60 of the rotor 57, and the cam for the cam provided at the tip of the elastic arm portion 61-2. The convex portion 61-3 engages with the concavo-convex surface 63-3 forming a cam surface provided on the inner peripheral surface of the opening of the housing 63 as the rotor 57 rotates, so that the operation shaft 56 rotates. A click feeling during operation is generated.

Japanese Utility Model Publication No. 61-141728

  However, in the conventional rotary electric component, the elastic member for click is fixed to the groove of the rotor, and the cam convex / concave surface is formed on the housing in association with the rotation of the operation shaft. When engaging with the top of the convex part, when it crosses the top of the convex part, it will self-run due to its own elastic force and fall into the concave part, but at that time, since the rotor with the operating shaft must be self-propelled, There was a problem that a good click feeling could not be obtained because the resistance increased and the self-propelled power weakened.

  Accordingly, an object of the present invention is to solve the above-described problems and to provide a rotary electric component that can provide a good click feeling when the operating shaft is rotated.

  In order to solve the above-mentioned problem, in the present invention, as a first solving means, a box-shaped case having a bearing portion and having an opening on the lower surface side, and an operation shaft protruding from the upper surface of the case, the operation shaft is the bearing. A rotating member that is rotatably held by a portion, an elastic member having a first cam portion that protrudes from the tip of an arm portion that is held in the opening of the case and is elastically displaceable, and the rotating member, A concave and convex second cam portion that engages with the first cam portion and causes a click feeling when the operation shaft rotates, and a first conductive portion that is engaged with the rotating member and is connected to the rotating member. A conductive plate that rotates with rotation and a second conductive member that has a housing portion with an opening on the upper surface, is engaged with the opening portion of the case, and that slides on the conductor plate in the housing portion to output an electrical signal. And a housing having a concave portion when the operating shaft is rotated. It said first cam portion engaged with said second cam portion of the Jo has a configuration in which an elastic displacement direction of the arm portion is provided so as to be displaceable in the direction of rotation of the rotating member perpendicular.

Further, as a second solving means, the first cam portion is integrally formed by projecting by bending a tip of the arm portion of the elastic member, and an elastic member holding portion is provided in the case. The elastic member is loosely fitted to and held in a member holding portion, so that the first cam portion can be displaced in the rotation direction of the rotating member perpendicular to the elastic displacement direction of the arm portion. .
As a third solution, an engagement hole is provided at the tip of the arm portion of the elastic member, and an engagement protrusion is provided on the lower end side of the first cam portion. The first cam portion is configured to be displaceable in the rotation direction of the rotating member perpendicular to the elastic displacement direction of the arm portion by being loosely fitted in the engaging hole portion and held.

Further, as a fourth solving means, the displaceable gap of the first cam portion is less than half of the distance between the top portions of adjacent convex portions of the concave and convex second cam provided on the rotating member. The configuration was as follows.
Further, as a fifth solving means, the elastic member is formed in an annular shape, and the arm portions are formed to be opposed to each other in a circular arc shape, and a pair of leg portions are provided to face in a direction orthogonal to this. Thus, the leg is held by the elastic member holding portion of the case.

  As described above, the rotating electrical component of the present invention has a box-shaped case having a bearing portion and having an opening on the lower surface side, and an operation shaft protruding from the upper surface of the case, and the operation shaft is rotatably held by the bearing portion. A rotating member, an elastic member having a first cam portion that protrudes from the tip of an arm portion that is held in the opening of the case and is elastically displaceable, and is provided on the rotating member and engages with the first cam portion. A concave-convex second cam portion that causes a click feeling when the operation shaft rotates, a conductive plate that has a first conductive portion and is engaged with the rotating member and rotated as the rotating member rotates, and an upper surface opening And a housing having a second conductive portion that is slidably contacted with the conductor plate and outputs an electrical signal in the housing portion, and has an irregularity when the operating shaft rotates. The first cam portion that engages the second cam portion is an elastic displacement of the arm portion. The first cam portion that engages with the second cam portion of the rotating member at the time of rotation is provided by the elastic force of the elastic member. Good because the self-propelled rotation direction of the rotating member orthogonal to the elastic displacement direction of the arm portion eliminates the need for self-propelled rotation with the rotating member having the operating shaft, and the resistance decreases and the self-propelling force increases. Click feeling is obtained.

In addition, the first cam portion is integrally formed by projecting by bending the tip of the arm portion of the elastic member, and the case is provided with an elastic member holding portion, and the elastic member is loosely fitted to the elastic member holding portion. By holding, the first cam portion can be displaced in the rotation direction of the rotating member orthogonal to the elastic displacement direction of the arm portion, so that the elastic member is loosely fitted and held in the elastic member holding portion of the case. With this simple structure, the first cam portion can easily be caused to self-run in the rotation direction of the rotating member orthogonal to the elastic displacement direction of the arm portion.
In addition, an engagement hole is provided at the tip of the arm portion of the elastic member, an engagement protrusion is provided on the lower end side of the first cam portion, and the engagement protrusion is loosely fitted into the engagement hole and held. As a result, the first cam portion can be displaced in the rotation direction of the rotating member orthogonal to the elastic displacement direction of the arm portion, and therefore, the engaging protrusion of the first cam portion is engaged with the engaging hole of the elastic member. The first cam portion can be easily self-propelled in the rotation direction of the rotating member orthogonal to the elastic displacement direction of the arm portion with a simple structure of loosely fitting and holding the portion.

In addition, since the displaceable gap of the first cam portion is less than half of the distance between the tops of adjacent convex portions of the concave and convex second cam provided in the rotating member, the first cam portion However, even when the second cam portion is self-propelled from the convex portion of the second cam portion and falls into the concave portion, there is no possibility of self-propelling to the adjacent convex portion via the concave portion, and jumping between the cams can be reliably prevented.
In addition, the elastic member is formed in an annular shape, and the arm portion is formed in a pair of opposing shapes in a circular arc shape, and a pair of leg portions are provided in a direction orthogonal to the arm portion. Since the elastic member is held by the elastic member holding portion, the elastic member can be reliably held in the case and a good click feeling can be obtained.

  Embodiments of the present invention are shown in FIGS. 1 to 5 below. 1 is an exploded perspective view showing a rotating electrical component of the present invention, FIG. 2 is an assembled perspective view showing the rotating electrical component of the present invention, and FIG. 3 is a loose fit between a case of the rotating electrical component of the present invention and an elastic member. FIG. 4 is a perspective view showing a loose fit state between the arm portion of the elastic member and the first cam portion of the present invention, and FIG. 5 is a loose fit between the arm portion of the elastic member and the first cam portion. It is the perspective view which looked at the state from the lower surface side.

  1 to 3, the case 1 is formed in a box shape whose bottom surface is opened with an insulating material such as a synthetic resin, and is formed so as to protrude on the flat plate-like upper plate portion 1 a and the upper plate portion 1 a. It has a bearing portion 1b having a hollow insertion hole 1c and a side plate portion 1d that is turned around the outer peripheral edge of the upper plate portion 1a. The upper plate portion 1a is provided with a positioning boss 1e formed so as to protrude, and the boss 1e positions and attaches the case 1 to a mounting board of an electric device (not shown). Yes.

  Further, a pair of opposing side plate portions 1d are provided with locking projections 1f protruding outward. In addition, a cutout portion 1g is provided in one of the side plate portions 1d where the locking projection 1f is not provided. A lead terminal 6 led out from a housing 5 to be described later is disposed in the notch 1g, and the tip of the lead terminal 6 protrudes outward from the side plate 1d. In addition, a pair of recesses 1h are provided on the inner top surface of the upper plate portion 1a with a hollow insertion hole 1c interposed therebetween, and the pair of recesses 1h holds elasticity for holding leg portions 2c of the elastic member 2 described later. The member holding part is configured.

  The elastic member 2 is made of a substantially annular thin metal plate, and is provided with a pair of elastically displaceable arm portions 2a provided facing each other in an arc shape, and a first projectingly provided at the center tip of the arm portion 2a. The cam portion 2b is provided. Further, a pair of leg portions 2c are provided so as to face each other in a direction orthogonal to the pair of arm portions 2a and project outward from the annular portion. And the elastic member 2 is hold | maintained by a pair of recessed part 1h which is an elastic member holding part of case 1 by this pair of leg part 2c.

  In this case, as shown in FIG. 3, the structure of the elastic member holding portion of the case 1 is such that the inner wall width dimension (L1) of the pair of recesses 1h is larger than the outer width dimension (L2) of the pair of leg portions 2c. The pair of leg portions 2c are loosely fitted into the pair of recesses 1h with a predetermined gap (L1-L2). As described above, the elastic member 2 is loosely fitted and held in the elastic member holding portion of the case 1 so that the first cam portion 2b rotates in a direction perpendicular to the elastic displacement direction of the arm portion 2a, which will be described later. The member 3 can be displaced in the rotation direction (indicated by an arrow A in FIG. 3).

  The rotating member 3 is made of synthetic resin or zinc die-cast, and has a substantially cylindrical operating shaft 3a and a rotating body 3b provided in a disc shape at the root of the operating shaft 3a in a direction perpendicular to the axial direction. And a support shaft portion 3c protruding below the rotating body 3b. Further, a second cam portion 3d for click consisting of a plurality of uneven portions in the circumferential direction is provided on the upper surface of the rotating body 3b, and when the rotating member 3 is inserted into the bearing portion 1b of the case 1 The second cam portion 2b provided on the arm portion 2a of the elastic member 2 is brought into contact with the second cam portion 3d for click, thereby causing a click feeling during rotation.

  The conductor plate 4 is engaged with the lower surface of the rotating body 3b. The conductor plate 4 is made of an insulating material such as a phenolic resin laminate and has a disk shape having a through hole 4a in the center. The support shaft portion 3c of the rotating member 3 is inserted into the through hole 4a so as to rotate. It is possible to rotate together with the rotation of 3. A plurality of first conductive portions (not shown) made of a conductive material such as silver or carbon are formed on the lower surface of the conductor plate 4 in the circumferential direction.

  The housing 5 is made of an insulating material such as synthetic resin, and is formed in a box-like rectangular shape having a storage portion 5a having an upper surface opened. A second conductive portion (not shown) made of a conductive metal plate is formed on the inner bottom surface of the housing portion 5a of the housing 5 so as to protrude from the inner bottom surface. A plurality of lead terminals 6 led out from the second conductive portion are extended and arranged.

  When the housing 5 is engaged with the opening on the lower surface of the case 1, the lead terminal 6 is positioned and arranged in the notch 1 g provided in one of the side plates 1 d of the case 1. The tip of the lead terminal 6 is disposed so as to protrude outward from the side plate 1d of the case 1.

  Further, a pair of side surface portions in a direction intersecting with the one side surface portion where the lead terminal 6 of the housing 5 extends is provided with a notch portion 5b at a position facing each other at the center, and this notch portion 5b. A pair of bulged portions 5c and 5c having a wedge shape that tapers toward the opening direction of the upper surface is provided on both sides of the surface. By providing the bulging portion 5c, when the housing 5 is engaged with the opening on the lower surface of the case 1, the housing 5 is reliably engaged without any play.

  The protective plate 7 is formed by bending a metal plate, and includes a flat bottom plate 7a and a pair of side plates 7b and 7b. Further, the pair of side plates 7b, 7b are provided with engagement holes 7c, 7c made of rectangular through holes, and these engagement holes 7c, 7c are formed in the pair of side plate portions 1d facing the case 1. It is engaged with the provided locking protrusion 1f protruding outward.

Next, a method for assembling the rotary electric component of the present invention will be described.
First, the pair of leg portions 2 c of the elastic member 2 are positioned and held in the case 1 in a pair of recesses 1 h provided on the top surface of the opening of the case 1.

  Next, the operating shaft 3a of the rotating member 3 with the conductor plate 4 engaged with the lower surface of the rotating body 3b is inserted into a hollow bearing portion 1b formed to protrude on the upper plate 1 portion a of the case 1. The rotating body 3b and the conductor plate 4 are accommodated in the opening, and the second cam provided on the arm portion 2a of the elastic member 2 is added to the click second cam portion 3d provided on the upper surface of the rotating body 3b. The rotating member 3 is assembled in the case 1 with the part 2b in contact with it.

  Next, the housing 5 is inserted into the case 1 with the housing portion 5a of the housing 5 facing the opening of the case 1, and the lead terminal 6 is positioned at the notch 1g provided on the one side plate 1d. The lead terminal 6 is engaged with the case 1 with the tip of the lead terminal 6 protruding from the side plate 1 d of the case 1.

  At this time, the pair of wedge-shaped bulging portions 5c and 5c provided on the pair of side surface portions of the housing 5 are brought into pressure contact with the inner wall surface of the opening portion of the case 1 so that there is no backlash. Engaged. Also, a first conductive portion (not shown) provided on the lower surface of the conductor plate 4 engaged with the lower surface of the rotating body 3 b is provided to protrude from the inner bottom surface of the housing portion 5 a of the housing 5. It will be in the state which contacted the conductive part (not shown).

  Next, the protective plate 7 is mounted from the lower surface side of the case 1 so as to cover the bottom plate portion of the housing 5, and the pair of side plates 7b and 7b of the protective plate 7 are locked to the side plate portion 1d, thereby The housing 5 is held in the opening of the case 1 by the protective plate 7 while being positioned outside the side plate portion 1d.

  At this time, the engagement holes 7c, 7c, which are provided in the pair of side plates 7b, 7b of the protection plate 7 and are formed of rectangular through holes, are outwardly provided in the pair of side plate portions 1d opposed to the case 1. It will be engaged with the protruding locking projection 1f. In this case, since the protection plate 7 is formed of a metal plate having elasticity, the engagement hole 7c of the protection plate 7 and the locking projection 1f are snap-coupled so that the protection plate 7 is locked to the case 1. It has become a thing.

  The operation of the rotating electrical component having the above configuration will be described. When the operating shaft 3a of the rotating member 3 is rotated, the rotating body 3b rotates and the lower surface of the conductor plate 4 engaged with the lower surface of the rotating body 3b. A first conductive portion (not shown) provided on the housing 5 is in sliding contact with a second conductive portion (not shown) provided on the inner bottom surface of the housing portion 5a of the housing 5 to output an electrical signal. To be. At this time, the second cam portion 2b provided on the arm portion 2a of the elastic member 2 slides on the second cam portion 3d for click provided on the upper surface of the rotating body 3b. A feeling of clicking during rotation can be obtained.

  At this time, in the elastic member 2, the pair of leg portions 2c are held in the pair of recesses 1h which are the elastic member holding portions of the case 1, and as shown in FIG. 3, the dimension of the inner wall width of the pair of recesses 1h ( L1) is formed to be slightly larger than the dimension (L2) of the outer width of the pair of leg portions 2c, so that the pair of leg portions 2c has a predetermined gap (L1-L2) in the pair of recesses 1h. Is in a loosely fitted state. Then, the elastic member 2 is loosely fitted and held in the elastic member holding portion of the case 1 so that the first cam portion 2b rotates the rotation member 3 in a direction perpendicular to the elastic displacement direction of the arm portion 2a. It will be displaced (slightly moved) in the direction (indicated by arrow A in FIG. 3), so that a good click feeling can be obtained.

  4 and 5 show another embodiment of the elastic member 2 of the present invention. In this case, the elastic member 2 is made of a substantially annular thin metal plate, and is provided with a pair of elastically displaceable arm portions 2a provided facing each other in an arc shape and protruding at the center tip of the arm portion 2a. Although the first cam portion and the pair of arm portions 2a are opposed to each other in a direction orthogonal to each other and have a pair of leg portions 2c projecting outward from the annular portion, the configuration is the same as that of the above-described embodiment. The first cam portion is formed as a separate component from the arm portion 2a, and is partially different in that it is loosely fitted to the arm portion 2a and attached.

  That is, in the present embodiment, an engagement hole 2d penetrating vertically is provided at the tip (center) of the arm 2a of the elastic member 2, and the first cam 8 is made of synthetic resin or the like. The cam 8a is formed of the above-mentioned molded product and protrudes on the upper surface side, and the engaging protrusion 8b is formed in a hook shape on the lower surface side of the cam 8a. Then, the first cam portion 8 holds the engaging protrusion 8b loosely fitted in the engaging hole portion 2d, so that the first cam portion 8 is orthogonal to the elastic displacement direction of the arm portion 2a. It is possible to displace the rotating member 3 in the rotational direction.

At this time, the elastic member 2 is held by the pair of recesses 1h which are the elastic member holding portions of the case 1 by the pair of leg portions 2c. In this case, as shown in FIG. The inner wall width dimension (L1) of the recess 1h does not need to be slightly larger than the outer width dimension (L2) of the pair of legs 2c, and the elastic member 2 is reliably positioned on the elastic member holding portion. The dimensions of each other may be set so that they are held together.
Also in this case, since the first cam portion 8 is loosely fitted and held on the arm portion 2a of the elastic member 2, the first cam portion 8 is in a direction orthogonal to the elastic displacement direction of the arm portion 2a. Therefore, the rotation member 3 is displaced (slightly moved) in the rotation direction (indicated by an arrow A in FIG. 3), and thus a good click feeling can be obtained.

  According to the above-described embodiment of the present invention, the elastic member 2 having the first cam portions 2b and 8 protruding at the tip of the arm portion 2a that is held in the opening of the case 1 and can be elastically displaced, and the rotating member 3 An uneven second cam portion 3d that engages with the first cam portions 2b and 8 and causes a click feeling when the operation shaft 3a rotates, and has an uneven shape when the operation shaft 3a rotates. The first cam portions 2b and 8 that engage with the second cam portion 3d are provided so as to be displaceable in the rotational direction of the rotating member 3 perpendicular to the elastic displacement direction of the arm portion 2a. The first cam portions 2b and 8 that sometimes engage with the second cam portion 3d of the rotating member 3 rotate the rotating member 3 perpendicular to the elastic displacement direction of the arm portion 2a by the elastic force of the elastic member 2. It is necessary to make the rotating member 3 having the operation shaft 3a self-propelled by self-propelling in the direction. It disappears because, since the resistance becomes self force increases less, has become that good click feeling is obtained.

It is a disassembled perspective view which shows the rotary electrical component of this invention. It is an assembly perspective view which shows the rotation type electrical component of this invention. It is a bottom view which shows the loose fitting state of the case and elastic member of the rotary electric component of this invention. It is a perspective view which shows the loose fitting state of the arm part of the elastic member of this invention, and a 1st cam part. It is the perspective view which looked at the loose fit state of the arm part of the elastic member of the present invention, and the 1st cam part from the lower surface side. It is a principal part fracture | rupture top view which shows the conventional rotary electrical component. It is a disassembled perspective view which shows the conventional rotating electrical component.

Explanation of symbols

1: Case 1a: Upper plate portion 1b: Bearing portion 1c: Insertion hole 1d: Side plate portion 1e: Boss portion 1f: Locking projection 1g: Notch portion 1h: Recessed portion 2: Elastic member 2a: Arm portion 2b: First Cam part 2c: Leg part 2d: Engagement hole part 3: Rotating member 3a: Operation shaft 3b: Rotating body 3c: Support shaft part 3d: Second cam part 4: Conductor plate 4a: Through hole 5: Housing 5a: Storage Part 5b: Notch part 5c: Swelling part 6: Lead terminal 7: Protection plate 7a: Bottom plate 7b: Side plate 7c: Engagement hole 8: First cam part 8a: Cam 8b: Engaging protrusion

Claims (5)

  A box-like case having a bearing portion and having an opening on the lower surface side, a rotating member having an operation shaft projecting on the upper surface of the case, the operation shaft being rotatably held by the bearing portion, and an opening in the case And an elastic member having a first cam portion projecting from the tip of the arm portion that is elastically displaceable and is clicked when the operation shaft is rotated by being engaged with the first cam portion and provided on the rotating member. A concave-convex second cam portion that causes a feeling of sensation, a conductor plate that has a first conductive portion, is engaged with the rotating member and is rotated when the rotating member is rotated, and a storage portion having an upper surface opening. And a housing having a second conductive portion that is engaged with the opening of the case and outputs an electrical signal in sliding contact with the conductor plate in the storage portion, and has an irregular shape when the operation shaft rotates. The first cam portion engaged with the second cam portion of the Rotary electric part, characterized in that is provided so as to be displaceable in the direction of rotation of the rotating member perpendicular to the elastic displacement direction of the over arm portion.   The first cam portion is formed integrally by being bent by bending the end of the arm portion of the elastic member, and the case is provided with an elastic member holding portion, and the elastic member is allowed to play in the elastic member holding portion. 2. The rotary mold according to claim 1, wherein the first cam portion is displaceable in a rotation direction of the rotary member perpendicular to an elastic displacement direction of the arm portion by being fitted and held. Electrical component.   An engagement hole is provided at the tip of the arm portion of the elastic member, and an engagement protrusion is provided on the lower end side of the first cam portion, and the engagement protrusion is loosely fitted into the engagement hole. The rotary electric component according to claim 1, wherein the first cam portion is displaceable in a rotation direction of the rotation member perpendicular to an elastic displacement direction of the arm portion by holding.   The displaceable gap of the first cam portion is set to be equal to or less than half of the distance between the top portions of adjacent convex portions of the concave-convex second cam provided on the rotating member. The rotating electrical component according to any one of items 1 to 3.   The elastic member is formed in an annular shape, and the arm portions are formed to be opposed to each other in a circular arc shape, and a pair of leg portions are provided to face each other in a direction orthogonal thereto, and the elastic members are formed by the leg portions. The rotary electric component according to claim 2, wherein the elastic member holding portion is held by the elastic member holding portion of the case.

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