JP2007179882A - Rotary type electric parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary type electric parts in which dimensional precision of a rotating shaft for mounting an operation knob can be enhanced and mounting of the operation knob is secured. <P>SOLUTION: This rotary type electric parts is provided with a housing consisting of a mounting plate 9 having a bearing part 9b and a case 1, a rotating shaft 6 made of a synthetic resin which is protruded from the bearing part 9b of the housing and in which the operation knob 10 is mounted on the protruding tip side, and a rotation detecting means consisting of a slider 5 for detecting the rotation of the rotating shaft 6 and a conductive pattern 3, and in the rotation shaft 6, a hollow center recessed part 6h is installed which is recessed in the axial line direction of the rotating shaft 6 from the end face of the protruding tip side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary electrical component, and more particularly to a rotary electrical component in which a rotary shaft to which an operation knob is attached is formed of a synthetic resin material.

  The structure of a conventional rotary electrical component includes a push switch that turns the switch on and off by the movement of the operation shaft in the axial direction, and the rotary electrical component such as a pulse switch or variable resistor by the rotational motion of the operation shaft. The thing of the structure which operated this is known (for example, refer patent document 1).

  The structure of this conventional rotating electrical component is shown in FIGS. FIG. 13 is a cross-sectional view of a conventional rotary electric component, and FIG. 14 is an exploded perspective view of a driving body and an operation shaft.

  In the figure, the rotary electric component D is shown by taking a pulse switch as an example, and the cup-shaped mounting base 31 has a bottom wall 31b having a circular hole 31a and a side wall 31d having a recess 31c. The mounting base 31 has a plurality of conductive plates 32 made of a thin metal plate so that a part of the mounting base 31 is exposed on the upper surface of the bottom wall 31b in the recess 31c and a part of the mounting base 31 protrudes to the outside from the side wall 31d. Is buried.

  The driving body 33 includes a cylindrical portion 33b having a non-circular hole 33a, a receiving portion 33c provided at the rear end of the cylindrical portion 33b so as to cross the hole 33a, and a small portion provided in the receiving portion 33c. A hole 33d, a pair of notches 33e provided in communication with the hole 33a, a pair of locking portions 33f formed by projecting a part of the wall surface of the hole 33a, and a cylindrical portion 33b A circular flange 33g provided on the outer periphery and an uneven portion 33h provided on the front surface of the flange 33g are provided. The pair of notches 33e and the locking portion 33f of the driving body 33 are formed to face each other in the axial direction, and a slider 34 is attached to the rear surface of the flange portion 33g of the driving body 33. It has been. And this drive body 33 positions the collar part 33g in the recessed part 31c of the attachment base 31, inserts the rear end of the cylindrical part 33b in the hole 31a, and is rotatably attached to the attachment base 31. A slider 34 attached to the driving body 33 is brought into contact with and separated from the conductive plate 32 to switch the contact points to constitute a pulse switch.

  The link-shaped leaf spring 35 is disposed on the front surface of the mounting base 31 and the flange portion 33g so as to close the concave portion 31c of the mounting base 31. This causes a click operation during rotation. The front plate 36 has a flat plate portion 36a and a cylindrical portion 36b. The flat plate portion 36a of the front plate 36 is placed on a plate spring 35, and the front plate 36 and the plate spring 35 are attached to the mounting base 31. Are fixed by appropriate means.

  The operation shaft 37 includes a columnar portion 37a provided on the axis S, a pair of mounting legs 37c each having a dividing groove 37b in the direction of the axis S, and a step portion 37d. The operating shaft 37 is attached from the columnar portion 37a side into the cylindrical portion 36b of the front plate 36 and the hole 33a of the cylindrical portion 33b of the driving body 33, and the mounting leg 37c of the operating shaft 37 contacts the locking portion 33f. When it comes into contact, the mounting leg 37c bends inward, and when the operation shaft 37 continues to be inserted, the mounting leg 37c gets over the locking portion 33f and returns to its original state with springiness (snap stop). The distal end of the mounting leg 37c is inserted into the notch 33e, the columnar portion 37a is inserted into the small hole 33d of the receiving portion 33c, and the operating shaft 37 is attached to the driver 33.

  That is, when the operating shaft 37 is snapped to the driving body 33, when the operating shaft 37 is pressed, the operating shaft 37 moves straight through the non-circular hole 33a, and the stepped portion 37d hits the end of the driving body 33 to stop the movement. In addition, when the operating shaft 37 is returned to the state before the pressing pressure, the attachment leg 37c is hooked on the locking portion 33f to prevent further movement. The operation shaft 37 is rotatably supported at two points, that is, a cylindrical part 36b and a receiving part 33c. Thus, the operation shaft 37 attached to the drive body 33 can be rotated and moved in the direction of the axis S, and the drive body 33 is rotated by the rotation operation.

  Further, an insulator 40 in which fixed contacts 38 and 39 are embedded is attached to the rear portion of the attachment base 31, and a dish-shaped movable contact 41 is disposed inside the insulator 40. The movable contact 41 has a peripheral portion that is always in contact with the fixed contact 39, a central portion that is in contact with the columnar portion 37a of the operation shaft 37, constantly pressing the operation shaft 37 forward, and the mounting leg 37c to the locking portion 33f. It is designed to be locked. The insulator 40 having the fixed contacts 38 and 39 and the movable contact 41 constitute a push switch P.

  When the operation shaft 37 is rotated, the drive body 33 is rotated, and the pulse switch that is the rotary electrical component D is operated. When the operating shaft 37 is pressed in the direction of the axis S, the columnar portion 37 a of the operating shaft 37 presses the movable contact 41, the movable contact 41 moves to the fixed contact 38 side, and the movable contact 41 becomes the fixed contact 38. The fixed contacts 38 and 39 are turned ON. In this way, the rotary electrical component D and the push switch P are operated.

JP-A-11-96855

  However, in the conventional rotary electric component described above, since the operation shaft is formed from a synthetic resin molding material, it is difficult to accurately form the dimensions of the operation shaft to which the exterior operation knob is attached. There is a problem in that the fitting state when the operation knob is attached to the operation shaft varies, resulting in insufficient attachment.

  Accordingly, an object of the present invention is to solve the above-described problems, to improve the dimensional accuracy of an operation shaft (rotary shaft) to which an operation knob is attached, and to provide a rotary electric component in which the operation knob is securely attached. And

In order to solve the above-mentioned problem, in the rotary electric component of the present invention, as a first solving means, a housing having a bearing portion, a projection protruding from the bearing portion of the housing, and an operation knob attached to the protruding tip side. A rotation shaft made of synthetic resin, and a rotation detecting means comprising a slider and a conductive pattern for detecting the rotation of the rotation shaft. The rotation shaft extends from the protruding end surface toward the axis of the rotation shaft. It was set as the structure by which the hollow hollow center recessed part was provided.
As a second solution, an inner wall portion is provided at a position passing through the axis of the rotation shaft in the central recess portion of the rotation shaft, and the inner wall portion is provided between the opposing inner side surfaces of the center recess portion. It was set as the structure which divided | segmented the recessed part.

Further, as a third solving means, the distal end side of the rotating shaft is formed in a D-shaped cross section, has an arc-shaped portion and a linear portion, and the inner wall portion that divides the central recessed portion is It was set as the structure provided so that both might be connected over an arc-shaped part and a linear part.
As a fourth solution, the inner wall portion is formed at a position recessed from the end face on the distal end side of the rotating shaft, and the recessed distal end side of the inner wall portion is formed at a gate position during molding of the rotating shaft. The configuration is as follows.
Further, as a fifth solving means, the central recess is provided on the distal end side of the rotating shaft protruding from the bearing portion so that the rotating shaft does not reach a portion supported by the bearing portion. .

As described above, the rotary electric component of the present invention includes a housing having a bearing portion, a synthetic resin rotary shaft that protrudes from the bearing portion of the housing and has an operation knob attached to the protruding tip side, and a rotary shaft. The rotation shaft is provided with a hollow central recess that is recessed in the axial direction of the rotation shaft from the protruding end surface. For this reason, a hollow central recess is provided on the tip side of the rotating shaft to which the exterior control knob is attached, so that there is little dimensional change such as deformation (shrinkage) due to the influence of heat cooling or the like during molding of the rotating shaft. Since the size of the rotating shaft can be accurately formed, the operation knob can be securely attached to the rotating shaft, and the mounting workability at the time of mounting can be improved.
In addition, the central concave portion of the rotation shaft is provided with an inner wall portion at a position passing through the axis of the rotation shaft, the inner wall portion is provided between the opposing inner surfaces of the central concave portion, and the central concave portion is divided. Can be reduced individually, so that the overall strength of the rotating shaft can be increased.

Further, the tip side of the rotating shaft has a D-shaped cross section and has an arcuate part and a linear part, and an inner wall part that divides the central concave part extends between the arcuate part and the linear part. Even if there is a linear engaging part that is easy to deform in the mounting part of the operation knob, the inner wall part connects to the arc-shaped engaging part that is difficult to deform. Therefore, the strength of the rotating shaft can be maintained.
In addition, the inner wall portion is formed at a position recessed from the end surface on the front end side of the rotating shaft, and the recessed front end side of the inner wall portion is used as a gate position during molding of the rotating shaft, so that the gate position is the outer periphery of the rotating shaft. It can prevent coming out to a part and can make attachment property with an operation knob favorable. Further, it is possible to prevent the weld from being generated on the tip end side of the rotating shaft, and to increase the strength.
In addition, since the central recess is provided on the distal end side of the rotating shaft that protrudes from the bearing portion so that the rotating shaft does not reach the portion that is supported by the bearing portion, the central recessed portion is provided on the portion that is supported by the bearing portion. Since there is no hollow recess, it is possible to increase the bearing strength of the rotating shaft to the bearing portion.

  Embodiments of the present invention are shown in FIGS. 1 is an exploded perspective view showing a rotating electrical component of the present invention, FIG. 2 is a plan view showing the rotating electrical component of the present invention, FIG. 3 is a front view showing the rotating electrical component of the present invention, and FIG. FIG. 5 is a front view showing a rotating shaft of the rotary electric component of the present invention, FIG. 6 is a left side view of FIG. 5, FIG. 7 is a right side view of FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7, FIG. 9 is a front view showing a rotating body of the rotary electric component of the present invention, FIG. 10 is a right side view of FIG. FIG. 12 is a sectional view taken along line 12-12 of FIG.

  As shown in FIG. 1, the rotary electric component of the present invention includes a box-shaped case 1 having an opening on the upper surface, a fixed contact 2 and a conductive pattern 3 disposed in the case 1, and a fixed contact 2 and a conductive pattern 3. The movable contact 4 and the slider 5 that are in contact with and slidable with each other, a rotating shaft 6 that can be rotated and pressed, a rotating body 7 that rotates as the rotating shaft 6 rotates, and a sliding feel that slides on the rotating body And a mounting plate 9 that has a bearing portion that rotatably holds the rotary shaft 6 and covers the opening of the case 1. The case 1 and the mounting plate 9 constitute a housing.

  The case 1 is formed in a box shape having an accommodating portion 1a having an opening on the upper surface made of an insulating material such as synthetic resin. In addition, a pair of guide grooves 1b and 1b penetrating vertically are provided on opposite side surfaces of the case 1, and locking projections 1c and 1c projecting outward are provided in the guide grooves 1b and 1b, respectively. ing. In addition, a pair of concave grooves 1d and 1d are provided on the upper surface side (front surface side) of the storage portion 1a communicating with the guide grooves 1b and 1b, and the concave grooves 1d and 1d are respectively upward (forward). Projecting pieces 1e and 1e are provided. Then, a mounting leg portion 9d of a mounting plate 9 to be described later is engaged with the guide grooves 1b and 1b, and is positioned and engaged by the locking projection 1c and the projecting piece 1e, so that the mounting plate 9 is positioned above the opening of the case 1. It attaches so that the storage part 1a of this may be covered.

  Further, at the center of the inner bottom surface of the housing portion 1a of the case 1, a conductive metal plate is formed by being embedded in the case 1 in a state where a part thereof is exposed by a method such as insert molding, 2 and a peripheral fixed contact 2b are disposed so as to surround the central fixed contact 2a. Further, outside the fixed contact 2, an electrically conductive metal plate is embedded in the case 1 in a state where a part of the same is exposed to the outer peripheral portion of the inner bottom surface of the storage portion 1a by a method such as insert molding. The common pattern 3a and the code pattern 3b that are formed to form the conductive pattern 3 are disposed.

  Further, on the outer surface of the case 1, the central fixed contact 2 a and the peripheral fixed contact 2 b are electrically connected to the common pattern 3 a and the code pattern 3 b, and are connected to the connection terminals 2 c and lead out to the outside of the case 1. 2d and connection terminals 3c and 3d are provided in a projecting manner, and the connection terminals 2c, 2d, 3c, and 3d are arranged to be bent downward along the outer surface of the case 1, respectively.

  The movable contact 4 is made of a conductive thin metal plate and is formed in a disk shape having a dome-shaped bulging portion 4a that can be reversed at the center. The movable contact 4 is placed on the fixed contact 2 disposed in the housing portion 1a of the case 1, the outer peripheral edge 4b contacts the peripheral fixed contact 2b, and the top lower surface side of the bulging portion 4a is the center. It is arranged in a state of being opposed to the fixed contact 2a. The movable contact 4 and the fixed contact 2 constitute a push switch.

  The slider 5 is made of a conductive thin metal plate, and has an annular base portion 5a and round holes formed outwardly extending at a plurality of locations (three locations in this embodiment) of the base portion 5a. The mounting piece 5b has a plurality of contact pieces 5c extending in a cantilevered manner and having elasticity in an annular direction from the mounting piece 5b. The slider 5 is attached so as to be rotatable integrally with the rotating body 7 by attaching an attachment piece 5b to a rotating plate portion 7b of the rotating body 7 described later. When the rotating body 7 is rotatably housed in the housing portion 1 a of the case 1, the slider 5 is placed on the conductive pattern 3 disposed in the housing portion 1 a, and the rotating body 7 With the rotation, each contact piece 5c comes into sliding contact with the common pattern 3a and the code pattern 3b. The slider 5 and the conductive pattern 3 constitute rotation detection means such as an encoder.

  As shown in FIGS. 5 to 8, the rotating shaft 6 is made of an insulating material such as synthetic resin, and has a cylindrical thick shaft portion 6a having a diameter larger than that of a central through hole 7c of the rotating body 7 to be described later. A slightly thin and substantially cylindrical thin shaft portion 6b is provided so as to be connected in the axial direction via the step portion 6c on the same axis. Further, the flat shaft 6d has a flat surface 6d on the tip side of the thick shaft portion 6a opposed to the flat shaft 6a, and the flat surface 6d has a D-shaped cross section on the tip side so that the arc-shaped portion 6e and the straight portion 6f are formed. The knob attaching part 6g which has is provided. A hollow central recess 6h that is recessed from the end face in the axial direction is formed on the tip end side of the knob mounting portion 6g.

  Moreover, the hollow center recessed part 6h is provided over the whole knob attaching part 6g except the column-shaped thick shaft part 6a of the rotating shaft 6. FIG. That is, the hollow central recessed portion 6h is a rotation projecting outward from the bearing portion 9b except for a part of the thick shaft portion 6a that is supported by the bearing portion 9b of the mounting plate 9 whose rotation shaft 6 will be described later. The knob 6 is provided on the knob mounting portion 6g on the tip end side of the shaft 6. Then, an exterior operation knob 10 (indicated by a two-dot chain line in FIG. 3) is attached to the tip of this knob attachment portion 6g, and the rotary shaft 6 is rotated.

  Then, by providing a hollow central recess 6h on the tip side of the rotary shaft 6 to which the exterior operation knob 10 is attached, there is little dimensional change due to shrinkage during synthetic resin molding (natural cooling) and rotation. The dimension of the shaft 6 can be formed with high accuracy, and the reliability and workability of attaching the operation knob 10 can be improved. Further, the central recess 6h is provided on the distal end side of the rotating shaft 6 projecting outward from the bearing portion 9b with a depth such that the rotating shaft 6 does not reach the portion supported by the bearing portion 9b. Therefore, since there is no hollow recess in the portion where the rotating shaft 6 is supported by the bearing portion 9b, the bearing strength of the rotating shaft 6 to the bearing portion 9b can be increased.

  The hollow central recess 6h is provided with an inner wall 6i that divides the central recess 6h into approximately two equal parts at positions passing through the axis of the rotary shaft 6. Further, the inner wall portion 6i is provided between the opposed inner side surfaces of the central recess 6h, and the inner wall portion 6i connects between the arc-shaped portion 6e and the linear portion 6f having a D-shaped cross section. It is provided as follows. The inner wall portion 6i is formed at a recessed position in the axial direction from the end surface on the distal end side of the knob mounting portion 6g, and the rotary shaft 6 is formed on the recessed distal end side of the inner wall portion 6i. A gate (not shown) is provided.

  As described above, the inner recessed portion 6h of the rotating shaft 6 is provided with the inner wall portion 6i at a position passing through the axis of the rotating shaft 6, and the inner recessed portion 6h is provided between the opposing inner side surfaces of the central recessed portion 6h to divide the central recessed portion 6h. Thus, the size of the central recess 6h can be reduced individually, and the overall strength of the rotating shaft 6 can be increased. Further, even if the cross section on the tip side of the rotating shaft 6 is formed in a D-shape, the inner wall portion 6i is provided so as to connect between the arc-shaped portion 6e and the linear portion 6f. Even if the mounting portion of the knob 10 has a linear engaging portion that is easily deformed, the inner wall portion 6i is connected to the arc-shaped engaging portion that is difficult to deform. The strength can be maintained.

  Further, the inner wall 6i is formed at a position recessed from the end surface on the front end side of the rotating shaft 6, and by setting the recessed front end side of the inner wall 6i as a gate position at the time of molding of the rotating shaft 6, The gate position can be prevented from appearing on the outer peripheral portion of the rotating shaft 6, and the attachment property with the operation knob 10 can be improved. Further, it is possible to prevent the weld from being generated on the distal end side (knob attachment portion 6g) of the rotating shaft 6 and to increase the strength.

  Further, on the distal end side of the thin shaft portion 6b facing the knob mounting portion 6g of the rotating shaft 6, a protruding portion that protrudes outward in a direction (radial direction) orthogonal to the axial direction of the rotating shaft 6 6j is provided. A pair of the protruding portions 6j are provided at positions facing each other across the rotation center of the rotating shaft 6. And this protrusion part 6j engages with the engaging recessed part 7e of the rotary body 7 mentioned later, and the rotating shaft 6 and the rotary body 7 are accommodated in the case 1, and are arrange | positioned rotatably. ing.

  Further, a projection 6k protruding in the axial direction is provided on the end face on the distal end side of the thin shaft portion 6b. The protrusion 6k is arranged in a state of being in contact with the top of the dome-shaped bulged portion 4a of the movable contact 4. When the rotary shaft 6 is pressed in the axial direction, the protrusion 6k presses the bulging portion 4a of the movable contact 4 by the movement of the thin shaft portion 6b in the axial direction, and reverses the bulging portion 4a. The push switch is turned on by making contact with the central fixed contact 2a of the fixed contact 2 disposed on the surface.

  As shown in FIGS. 9 to 12, the rotating body 7 is also made of an insulating material such as synthetic resin, and has a cylindrical guide tube portion 7a and a disc-shaped rotating plate portion 7b. Further, the rotating body 7 is provided with a central through hole 7c penetrating in the axial direction of the rotary shaft 6. The central through hole 7c is continuous with the central through hole 7c and is a protruding portion of the rotary shaft 6. A through recess 7d through which 6j can be inserted is provided. Moreover, while having a predetermined angle with respect to the rotation center of this penetration recessed part 7d and the rotating shaft 6, in the front side which the rotating shaft 6 protrudes from the bearing part 9b and the rotary body 7, ie, the cylindrical guide cylinder part 7a side. An engaging recess 7e having a bottomed locking wall portion 7f is provided. In the present embodiment, the through recess 7d and the engagement recess 7e are formed in a substantially orthogonal direction (approximately 90 degrees).

  Further, a pair of penetrating recesses 7d and engaging recesses 7e are provided at positions facing each other so as to correspond to the pair of protrusions 6j and 6j of the rotating shaft 6. The thin shaft portion 6 b of the rotating shaft 6 is inserted into the central through hole 7 c from the front side of the guide tube portion 7 a of the rotating body 7, and the pair of projecting portions 6 j and 6 j of the rotating shaft 6 are connected to the rotating body 7. The pair of penetrating recesses 7d and 7d are inserted. When the rotary shaft 6 is rotated by a predetermined angle (approximately 90 degrees in the present embodiment) from the inserted state, the pair of protrusions 6j and 6j of the rotary shaft 6 are at a predetermined angle with the through recesses 7d and 7d. Rotate to the position of a pair of engaging recesses 7e, 7e provided to engage with the pair of engaging recesses 7e, 7e while being able to be locked to the pair of locking wall portions 7f, 7f. It has become a thing.

  When the thin shaft portion 6b of the rotating shaft 6 is inserted into the central through hole 7c of the rotating body 7 and the pair of protruding portions 6j and 6j are engaged with the engaging recesses 7e and 7e, the rotating body 7 is A pair of protrusions 6j, 6j of the rotating shaft 6 is provided so as to be movable in the axial direction of the rotating shaft 6 in the engaging recesses 7e, 7e. For this reason, the push operation of the push switch and the rotation operation of the rotation detection means are possible with a simple configuration.

And since the protrusion part 6j of the rotating shaft 6 engages reliably with the engaging recessed part 7e of the rotating body 7, and the rotating shaft 6 is hold | maintained integrally with the rotating body 7, the rotating shaft 6 is large force. Even when pulled, the protruding portion 6j abuts against the locking wall portion 7f of the rotating body 7, so that the protruding portion 6j does not come out and the pulling strength of the rotating shaft 6 can be improved.
The rotating body 7 has a cylindrical guide tube portion 7a and a disc-shaped rotation plate portion 7b, and a locking wall portion 7f of the engaging recess 7e is formed on the guide tube portion 7a side. As a result, the thickness of the locking wall portion 7f can be increased, so that the rotation shaft 6 can be more reliably prevented from coming off.

  Further, a pair of protrusions 6j of the rotating shaft 6 are provided at positions facing each other across the rotation center of the rotating shaft 6, and the through recess 7d and the engaging recess 7e of the rotating body 7 engaged with the pair of protrusions 6j, 6j. And a pair of protrusions 6j, 6j corresponding to the pair of projecting portions 6j, 6j, so that the rotation of the rotating shaft 6 can be reliably transmitted to the rotating body 7 and stable rotation operation is possible. In addition, since it can be assembled even if the rotary shaft 6 is rotated 180 degrees, assembly is facilitated and workability is improved.

  When the rotary shaft 6 is pressed in the axial direction, the projection 6k presses the bulging portion 4a of the movable contact 4 to turn on the push switch disposed below. At this time, the engagement dimension (L1) in the axial direction of the engagement surface where the pair of protrusions 6j, 6j of the rotating shaft 6 and the pair of engaging recesses 7e, 7e of the rotating body 7 engage with each other is determined by the push switch. The operation stroke, that is, the protrusion 6k of the rotating shaft 6 is formed to be larger than the stroke (L2) for turning the fixed contact 2 on by reversing the bulging portion 4a of the movable contact 4 (L1> L2). (See Figure 4)

  Thus, in this embodiment, the rotary shaft 6 is provided so as to be movable in the axial direction, and is provided with a push switch that is operated by pressing the rotary shaft 6, and the protruding portion 6 j of the rotary shaft 6 and the rotating body are provided. Since the engagement dimension (L1) in the axial direction of the engagement surface with which the engagement recesses 7e of 7 are engaged with each other is formed larger than the operation stroke (L2) of the push switch, the pressing operation of the push switch Even when the projection 6j of the rotating shaft 6 is not detached from the engaging recess 7e of the rotating body 7, the coupling between the rotating shaft 6 and the rotating body 7 can be ensured.

  In addition, on the upper surface side (the guide tube portion 7a side) of the rotating plate portion 7b of the rotating body 7, a click cam portion 7g composed of a plurality of concave and convex portions is provided in an annular shape so as to surround the guide tube portion 7a. The click cam portion 7g is in sliding contact with the click leaf spring 8, so that a click feeling during rotation can be obtained. In addition, a plurality of boss portions 7h (three in this embodiment) are provided in the circumferential direction at the outer side of the central through hole 7c on the lower surface side (the side opposite to the guide tube portion 7a) of the rotating plate portion 7b. The round hole of the mounting piece 5b of the slider 5 is inserted into the boss portion 7h, and is fixed by a method such as caulking so that it can be integrally rotated with the rotating body 7.

  The leaf spring 8 is made of an elastic thin metal plate, and has a ring-shaped spring portion 8a having a large opening, and a pair of substantially U-shaped fittings provided at opposing positions on the outer peripheral portion of the spring portion 8a. Part 8b, 8b. In the leaf spring 8, the rotating shaft 6 and the guide cylinder portion 7a of the rotating body 7 are inserted through the opening, and the spring portion 8a is in contact with the click cam portion 7g of the rotating plate portion 7b of the rotating body 7. The pair of fitting portions 8b and 8b are fitted and positioned and attached to the pair of concave grooves 1d and 1d and the projecting pieces 1e and 1e formed on the upper surface side of the storage portion 1a of the case 1. Yes.

  The mounting plate 9 that constitutes the housing together with the case 1 is made of a metal plate material such as a tinned steel plate, and is extended upward by drawing or the like at the center of the upper plate portion 9a and the upper plate portion 9a. A cylindrical bearing portion 9b having a large opening that rotatably supports (guides) the thick shaft portion 6a of the shaft 6 and the guide tube portion 7a of the rotating body 7, and the bearing portion 9b at the rectangular portion of the upper plate portion 9a. It has a plurality of fixed leg portions 9c, 9c that are bent and suspended in opposite directions, and a pair of attachment leg portions 9d, 9d that are also bent and suspended from a pair of opposite side portions. The pair of mounting legs 9d, 9d is provided with a first mounting hole 9e in the vicinity of the bent portion with respect to the upper plate portion 9a. The first mounting hole 9e is continuously provided in the vicinity of the second mounting hole 9f. Is provided.

  The mounting plate 9 has a cylindrical bearing portion 9b through which the rotating shaft 6 and the guide cylinder portion 7a of the rotating body 7 are inserted, and the fitting portion 8b of the leaf spring 8 between the housing 1a and the upper surface side of the case 1. The pair of mounting legs 9d and 9d are engaged with a pair of guide grooves 1b and 1b provided on the opposite side surfaces of the case 1, and the projecting piece 1e is inserted into the first mounting hole 9e. The mounting plate 9 is mounted so as to cover the storage portion 1a on the opening of the case 1 by being locked and the locking projection 1c being locked and positioned and engaged with the second mounting hole 9f. It has become.

  When the rotary shaft 6 is rotationally operated via the operation knob 10 in the rotary electric component configured as described above, the rotating body 7 rotates integrally due to the engagement between the protruding portion 6j and the engaging recess 7e. Then, each contact piece 5 c of the slider 5 is in sliding contact with the conductive pattern 3. When a pressing force in the axial direction is applied to the rotating shaft 6, the rotating shaft 6 moves while being guided by the rotating body 7, and the protrusion 6k presses the movable contact 4 so that the push switch is turned on. To do.

According to the above-described embodiment of the present invention, the housing composed of the mounting plate 9 having the bearing portion 9b and the case 1, and the housing operation knob 10 projecting from the bearing portion 9b of the housing and projecting on the leading end side. Is provided with a rotation shaft 6 made of synthetic resin, and a rotation detecting means comprising a slider 5 and a conductive pattern 3 for detecting the rotation of the rotation shaft 6. Since a hollow central recess 6h that is recessed in the axial direction of the rotary shaft 6 is provided from the end face on the side, a hollow central recess 6h is provided on the distal end side of the rotary shaft 6 to which the exterior operation knob 10 is attached. Therefore, when the rotary shaft 6 is molded, there is little dimensional change such as shrinkage due to the influence of cooling or the like, and the dimensions of the rotary shaft 6 can be formed with high accuracy. It is possible to attach the shaft 6 (knob mounting portion 6 g), which is intended to be improved mounting workability in mounting.
Moreover, the dimensional change of the front end side (knob attachment part 6g) of the rotating shaft 6 accompanying the change of ambient temperature can be made small, and also when using it for the use with a big temperature change, such as a vehicle-mounted use, The certainty of attachment to the rotating shaft 6 can be improved.

It is a disassembled perspective view which shows the rotary electrical component of this invention. It is a top view which shows the rotary electric component of this invention. It is a front view which shows the rotary electrical component of this invention. It is sectional drawing which shows the rotary electric component of this invention. It is a front view which shows the rotating shaft of the rotary electric component of this invention. FIG. 6 is a left side view of FIG. 5 of the present invention. FIG. 6 is a right side view of FIG. 5 of the present invention. It is sectional drawing in the 8-8 line | wire of FIG. 7 of this invention. It is a front view which shows the rotary body of the rotary electric component of this invention. FIG. 10 is a right side view of FIG. 9 of the present invention. It is sectional drawing in the 11-11 line | wire of FIG. 10 of this invention. It is sectional drawing in the 12-12 line | wire of FIG. 10 of this invention. It is sectional drawing which shows the conventional rotating electrical component. It is a disassembled perspective view which shows the conventional drive body and operation shaft.

Explanation of symbols

1: Case (housing)
DESCRIPTION OF SYMBOLS 1a: Storage part 1b: Guide groove 1c: Locking protrusion 1d: Concave groove 1e: Protruding piece 2: Fixed contact 2a: Center fixed contact 2b: Peripheral fixed contact 2c: Connection terminal 2d: Connection terminal 3: Conductive pattern 3a: Common Pattern 3b: Code pattern 3c: Connection terminal 3d: Connection terminal 4: Movable contact 4a: Swelling part 4b: Outer peripheral edge part 5: Slider 5a: Base part 5b: Mounting piece 5c: Contact piece 6: Rotating shaft 6a: Thick Shaft portion 6b: Fine shaft portion 6c: Step portion 6d: Flat surface 6e: Arc-shaped portion 6f: Linear portion 6g: Knob attachment portion 6h: Central concave portion 6i: Inner wall portion 6j: Protruding portion 6k: Projection 7: Rotating body 7a : Guide tube portion 7b: Rotating plate portion 7c: Central through hole 7d: Through recess portion 7e: Engaging recess portion 7f: Locking wall portion 7g: Cam portion 7h: Boss portion 8: Leaf spring 8a: Spring portion 8b: Fitting portion 9: Mounting plate (housing)
9a: Upper plate portion 9b: Bearing portion 9c: Fixed leg portion 9d: Mounting leg portion 9e: First mounting hole 9f: Second mounting hole 10: Operation knob

Claims (5)

  A housing having a bearing portion, a synthetic resin rotating shaft protruding from the bearing portion of the housing and having an operation knob attached to the protruding tip side, a slider and a conductive pattern for detecting the rotation of the rotating shaft The rotary electric component is characterized in that the rotary shaft is provided with a hollow central recess that is recessed in the axial direction of the rotary shaft from the protruding end surface.   The central recess of the rotation shaft is provided with an inner wall portion at a position passing through the axis of the rotation shaft, and the inner wall portion is provided between opposing inner side surfaces of the central recess to divide the central recess. The rotary electrical component according to claim 1.   The tip side of the rotating shaft has a D-shaped cross section and has an arcuate part and a linear part, and the inner wall part that divides the central recess extends across the arcuate part and the linear part. The rotary electrical component according to claim 2, wherein the rotary electrical component is provided so as to connect the two.   The inner wall portion is formed at a position recessed from the end face on the distal end side of the rotating shaft, and the recessed distal end side of the inner wall portion is used as a gate position during molding of the rotating shaft. The rotary electrical component according to 2 or 3.   5. The center recess according to claim 1, wherein the central recess is provided on a tip end side of the rotating shaft protruding from the bearing portion so that the rotating shaft does not reach a portion supported by the bearing portion. Rotating electrical component according to the above

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