Abstract:
In a multiple operation type electrical part of the invention, a clicking member is disposed between an insulating base member, being a component part of a first rotary electrical part, and a second rotary member, being a component part of a second rotary electrical part. Therefore, it is possible to provide a very small multiple operation type electrical part whose size in the axial direction thereof is reduced. Conventional multiple operation type electrical parts require, in addition to a first rotary electrical part, a clicking mechanism formed by two cases, a clicking member, and a rotary member. Therefore, conventional multiple operation type electrical parts use a large number of parts, is expensive, has poor productivity, and is large in the axial direction thereof. The multiple operation type electrical part overcomes these problems.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a multiple operation type electrical part suitable for use in operating, for example, a car stereo. 
     2. Description of the Related Art 
     A description will now be given of a conventional multiple operation type electrical part with reference to FIG.  30 . The bearing  51  comprises an axial portion  51   b , with a through hole  51   a  formed therein, and a flange  51   c . A cylindrical outer shaft  52  is rotatably mounted in the through hole  51   a  of the bearing  51 . 
     The cylindrical sleeve  53 , fitted to the rear side of the outer shaft  52 , is affixed to the outer shaft  52  by caulking the sleeve  53  from the outer side thereof. 
     The case  54 , which is a zinc die-casting or the like, has a recess  54   a  having accommodated therein a self-returning coil spring  55 . With the arm portion  55   a  retained by the side wall of the case  54 , the coil spring  55  is mounted to the case  54 . 
     The case  54 , having the coil spring  55  mounted thereto, is disposed on the rear side of the flange  51   c  of the bearing  51 . When the case  54  is disposed in this manner, the sleeve  53  is disposed so as to be placed within the wound portion  55   b  of the coil spring  55 . 
     Clockwise or counterclockwise rotation of the outer shaft  52  causes rotation of the sleeve  53 . 
     The rotation of the sleeve  53  causes movement of one of the arms  55   a  of the coil spring  55  in opposition to the resiliency of the arm  55   a.    
     When the outer shaft  52  is released so that rotational force is longer applied thereto, the springy arm  55   a , which has been moved, bumps into the side wall of the case  54  due to its resiliency, whereby the outer shaft  52  and the sleeve  53  rotate until they return to their original positions and stop there. Accordingly, the outer shaft  52  and the sleeve  53  are self-returning component parts capable of returning to their original positions by themselves. 
     A sliding member  57 , formed of a springy metallic plate, is mounted to a rotary member  56 , which is a molded product of synthetic resin. With the sleeve  53  fitted into a hole at the center portion of the rotary member  56 , the rotary member  56  is mounted on the rear side of the case  54 , so that it rotates as the sleeve  53  rotates. 
     The case  58 , which is a molded product of synthetic resin, has a recess  58   a . A contact member  59  is embedded in the case  58  so as to be exposed at the bottom portion of the recess  58   a.    
     With the rotary member  56  accommodated in the recess  58   a , the case  58  is disposed on the rear side of the case  54 . 
     When the case  58  is disposed in this manner, the sliding member  57  can come into contact with and separate from the contact member  59 . When the rotary member  56  rotates as a result of the rotation of the outer shaft  52 , the sliding member  57  rotates in order to come into contact with or separate from the contact member  59 , whereby a switching operation takes place. 
     The rotary member  56 , having the sliding member  57  mounted thereto, and the case  58 , having the contact member  59  mounted thereto, form a first rotary electrical part D 4 . 
     The inner shaft  60  is inserted into a hole of the outer shaft  52  in such a manner as to protrude from the rear side of the case  58 , and is mounted in the hole so as to be rotatable and axially movable. 
     The case  61 , which is a molded product of synthetic resin, has a bottom wall  61   a , being a recessed portion, and a bumpy portion  61   b , formed at the bottom wall  61   a . With the inner shaft  60  inserted in a hole of the case  61 , the case  61  is disposed on the rear side of the case  58 . 
     The rotary member  62 , which is a molded product of synthetic resin, has an axial portion  62   a  and a flange  62   b . A clicking member  63 , formed of a spring plate, is mounted at the front side of the flange  62   b  of the rotary member  62 . 
     The case  64 , which is a molded product of synthetic resin, has a recess  64   a , at the center portion thereof, and a hole  64   b , connected to the recess  64   a . With the rotary member  62  accommodated in the recess  64   a , the axial portion  62   a  of the rotary member  62  is fitted to the hole  64   b , whereby the rotary member  62  is rotatably supported by the case  64 . 
     With the rotary member  62  being inserted in the case  64  and the inner shaft  60  of the rotary member  62  being joined to the axial portion  62   a  of the rotary member  62  through splines, the case  64  is disposed on the rear side of the case  61 . 
     When the case  64  is disposed in this manner, the clicking member  63  can engage and disengage the bumpy portion  61   b  of the case  61 . Rotation of the inner shaft  60  causes rotation of the rotary member  62 . This causes the clicking member  63  to engage and disengage the bumpy portion  61   b  in order to provide a tactile feel when the inner shaft  60  is rotated. 
     The case  61 , the rotary member  62 , having the clicking member  63  mounted thereto, and the case  64  form a click mechanism K. 
     The rotary member  65 , which is a molded product of synthetic resin, has an axial portion  65   a  and a flange  65   b , with a movable contact  66  being embedded in and mounted to the flange  65   b.    
     The case  67 , which is a molded product of synthetic resin, has a hole  67   a  and a recess  67   b , with a sliding member  68 , formed of a springy metallic plate, being embedded in and mounted to the case  67 . 
     With the rotary member  65  being accommodated in the recess  67   b , the axial portion  65   a  of the rotary member  65  is fitted into the hole  67   a , whereby the rotary member  65  is rotatably supported by the case  67 . 
     With the rotary member  65  being inserted in the case  67  and the inner shaft  60  being joined to the axial portion  65   a  of the rotary member  65  through splines, the case  67  is disposed on the rear side of the case  64 . 
     When the case  67  is disposed on the rear side of the case  64 , the sliding member  68  can come into contact with and separate from the movable contact  66 . Rotation of the rotary member  65  as a result of the rotation of the inner shaft  60  causes the movable contact  66  to rotate and come into contact with and separate from the sliding member  68 , whereby switching operations are performed. 
     The rotary member  65 , to which the movable contact  66  is mounted, and the case  67 , to which the sliding member  68  is mounted, form a second rotary electrical part D 5 . 
     With the inner shaft  60  being inserted in a hole formed in the center portion of an insulating plate  69 , the insulating plate  69 , formed of insulating material, is disposed on the rear side of the case  67 . 
     A dislodgment preventing plate  70  is mounted to the inner shaft  60 , projecting from the rear side of the insulating plate  69 , in order to prevent the inner shaft  60  from being dislodged towards the front. 
     An actuating member  72  is mounted to the fixed member  71 , being a molded product of synthetic resin. With the actuating member  62  being in contact with one end of the inner shaft  60 , the fixed member  71  is fitted to the protrusion and the recess of the case  67  so as to be disposed on the rear side of the case  67 . 
     The case  73 , which is a molded product of synthetic resin, has a recess  73   a  and a bottom wall  73   b , with contact members  74  and  75 , exposed at the bottom wall  73   b , being embedded in and mounted to the case  73 . 
     The movable contact  76 , formed of a springy metallic plate, is dish-like in shape and has a concavely formed center portion. It is accommodated in the recess  73   a  of the case  73 . The center portion of the movable contact  76  is separated from the contact member  74 , and the peripheral portions thereof are mounted to the contact member  75  so as to be normally in contact therewith. 
     With the fixed member  71  and the actuating member  72  being accommodated in the recess  73   a , the case  73  is disposed on the rear side of the insulating plate  69 . 
     When the case  73  is disposed in this manner, the center portion of the movable contact  76  comes into contact with the actuating member  72 . The resiliency of the movable contact  76  causes the actuating member  72  and the inner shaft  60  to be normally pushed towards the front, so that the plate  70  is pushed against the insulating plate  69 . 
     When the inner shaft  60  is pushed rearwards in the axial direction thereof, causing the actuating member  72  to move in the same direction, the center portion of the movable contact  76  is pushed in opposition to its resiliency, and comes into contact with the contact member  74 . This renders the contact members  74  and  75  conductive, turning on a push switch S. When the inner shaft  60  is released, the resiliency of the movable contact  76  causes the actuating member  72  and the inner shaft  60  to return to their original positions. This causes the movable contact  76  to separate from the contact member  74 , whereby the push switch S is turned off. 
     The case  73 , to which the contact members  74  and  75  are mounted, and the movable contact  76  form the push switch S. 
     The cover  77 , which is a molded product of synthetic resin, is disposed on the rear side of the case  73  in order to prevent entry of dust or the like into the case  73 . 
     As described above, the bearing  51  and the cover  77  and the various component parts disposed therebetween are disposed successively on their corresponding component parts. These component parts are integrally mounted using a mounting plate (not shown). 
     A description will now be given of the operation of the multiple operation type electrical part having the above-described structure. When the outer shaft  52  is rotated clockwise or counterclockwise, the sleeve  53  and the rotary member  56  rotate at the same time. The sleeve  53  rotates in opposition to the resiliency of one of the arms  55   b  of the coil spring  55 . The rotation of the rotary member  56  causes the sliding member  57 , mounted to the rotary member  56 , to rotate and come into contact with and separate from the contact member  59 , whereby a switching operation is performed at the first rotary electrical part D 4 . 
     When the outer shaft  52  is released so that rotational force is no longer applied, the resiliency of the arm  55   b , which has been moved, causes the sleeve  53  and the rotary member  56  to rotate back to their original positions, whereby the first rotary electrical part D 4  returns to its original switching state. The rotary member  56  is a self-returning component part capable of returning to its original position by itself. 
     Clockwise or counterclockwise rotation of the inner shaft  60  causes rotation of the rotary member  62 , joined to the inner shaft  60  through splines. This causes the clicking member  63 , mounted to the rotary member  62 , to engage and disengage the bumpy portion  61   b  of the case  61  in order to provide a tactile feel when the inner shaft  60  is rotated. This also causes the rotary member  65 , joined to the inner shaft  60  through splines, to rotate. The rotation of the rotary member  65  causes the movable contact  66 , provided at the rotary member  65 , to rotate and come into contact with and separate from the sliding member  68 , whereby a switching operation is performed at the second rotary electrical part D 5 . 
     When the inner shaft  60  is pushed rearward in the axial direction thereof, the actuating member  72  moves in the same direction to push the center portion of the movable contact  76  in opposition to the resiliency of the movable contact  76 . This causes the center portion of the movable contact  76  to come into contact with the contact member  74 , thereby rendering the contact members  74  and  75  of the push switch S conductive, and turning on the push switch S. 
     When the inner shaft  60  is released, the resiliency of the movable contact  76  causes the actuating member  72  and the inner shaft  60  to return to their original positions. This causes the movable contact  76  to separate from the contact member  74  and to turn off the push switch S. 
     Accordingly, the multiple operation type electrical part is operated in the above-described way. 
     The multiple operation type electrical part having the above-described structure is used in operating a car stereo. More specifically, the first rotary electrical part D 4  is used for radio tuning. The second rotary electrical part D 5  is used, for example, for volume or bass adjustments. The push switch S is used for switching, for example, volume or bass modes. 
     Since the various operations of the multiple operation type electrical part can be carried out at the operating portions concentrated at a particular area, the multiple operation type electrical part is used particularly in car stereos. 
     In addition to the first rotary electrical part D 4 , the conventional multiple operation type electrical part requires a clicking mechanism K formed by two cases  61  and  64 , and a clicking member  63  and a rotary member  62 . Therefore, conventional multiple operation type electrical parts require a larger number of parts, are expensive, have poor productivity, and have increased size in the axial direction. 
     Dislodgment of the inner shaft  60  is prevented by passing the inner shaft  60  through a plurality of cases or the like, and through an insulating plate  69 , and using the space in the case  73  at the rearmost part of the multiple operation type electrical part. Therefore, conventional multiple operation type electrical parts become very large in the axial direction thereof. 
     In addition, in order to move one of the arms  55   b  of the self-returning coil spring  55 , a sleeve  53  needs to be formed separately of the rotary member  56 , resulting in increased size of the multiple operation type electrical part. 
     SUMMARY OF THE INVENTION 
     In order to overcome the above-described problems, according to a basic form of the present invention, there is provided a multiple operation type electrical part comprising a rotatable cylindrical outer shaft; 
     a rotatable inner shaft inserted in the outer shaft; 
     a first rotary electrical part comprising a first rotary member and an insulating base member, the first rotary member being actuated by the rotational motion of the outer shaft, and the insulating base member having a sliding member mounted thereto; 
     a second rotary electrical part comprising a second rotary member with a bumpy portion, the second rotary member being actuated by the rotational motion of the inner shaft; and 
     a clicking member which engages the bumpy portion in order to provide a tactile feel as a result of the rotation of the inner shaft; 
     wherein the sliding member is provided at one surface side of the insulating base member so as to protrude therefrom, and the clicking member is provided at the other surface side of the insulating base member so as to engage the bumpy portion. 
     In the multiple operation type electrical part, the insulating base member may have an opening for accommodating a contact portion of the sliding member therein, and a mounting portion for mounting the clicking member thereto. 
     In the multiple operation type electrical part, the first rotary member may have at the center portion thereof a recess for inserting the inner shaft therein, with the inner portion of the recess being used to prevent dislodgment of the inner shaft towards the front. 
     The multiple operation type electrical part may further comprise a dislodgment preventing member mounted to the inner shaft, the dislodgment preventing member being brought into contact with an inner wall defining the recess of the first rotary member in order to prevent dislodgment of the inner shaft towards the front. 
     In the multiple operation type electrical part, the first rotary member may comprise a rotary member having a movable contact, and a linking member having the recess, with the linking member and the outer shaft being joined together. 
     The multiple operation type electrical part may further comprise a self-returning coil spring provided at the outer periphery of the linking member, the coil spring having an arm, which is moved by the rotary member in order to cause the outer shaft to return to its original position by itself. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a sectional view of a multiple operation type electrical part in accordance with the present invention. 
     FIG. 2 is a plan view of the bearing of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 3 is a side view of the bearing of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 4 is a sectional view of the bearing of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 5 is a plan view of the linking member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 6 is a sectional view taken along line  6 — 6  of FIG.  5 . 
     FIG. 7 is a sectional view taken along line  7 — 7  of FIG.  5 . 
     FIG. 8 is a bottom view of the linking member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 9 is a plan view of the coil spring of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 10 is a side view of the coil spring of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 11 is a plan view of the rotary member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 12 is a sectional view taken along line  12 — 12  of FIG.  11 . 
     FIG. 13 is a bottom view of the rotary member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 14 is a plan view of the insulating base member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 15 is a side view of the insulating base member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 16 is a bottom view of the insulating base member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 17 is a plan view of the second rotary member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 18 is a side view of the second rotary member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 19 is a plan view of the actuating member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 20 is a sectional view of the actuating member of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 21 is a plan view of the insulating case of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 22 is a side view of the insulating case of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 23 is a bottom view of the insulating case of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 24 is a plan view of the mounting plate of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 25 is a front view of the mounting plate of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 26 is a side view of the mounting plate of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 27 is a view taken along line  27 — 27  of FIG. 1, illustrating the mounted state of the coil spring. 
     FIG. 28 is a view taken along line  28 — 28 , illustrating the mounted state of the clicking member. 
     FIG. 29 is a sectional view of another embodiment of the multiple operation type electrical part in accordance with the present invention. 
     FIG. 30 is a sectional view of a conventional operation type electrical part in accordance with the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     A description will now be given of embodiments of the multiple operation type electrical part of the present invention with reference to FIGS. 1 to  29 . FIG. 1 is a sectional view of the multiple operation type electrical part in accordance with the present invention. FIGS. 2 to  4  illustrate the bearing. FIGS. 5 to  8  illustrate the linking member. FIGS. 9 and 10 illustrate the self-returning coil spring. FIGS. 11 to  13  illustrate the rotary member. FIGS. 14 to  16  illustrate the insulating base member. FIGS. 17 and 18 illustrate the second rotary member. FIGS. 19 and 20 illustrate the actuating member. FIGS. 21 to  23  illustrate the insulating base portion. FIGS. 24 to  26  illustrate the mounting member. FIG. 27 is a view taken along line  27 — 27  of FIG. 1, illustrating the mounted state of the coil spring. FIG. 28 is a view taken along line  28 — 28  of FIG. 1, illustrating the mounted state of the clicking member. 
     A description will now be given of an embodiment of the multiple operation type electrical part in accordance with the present invention with reference to FIGS. 1 to  28 . As shown in FIGS. 2 to  4 , and FIG. 27, the bearing  1 , which is a metallic die casting or a molded product of synthetic resin, has a cylindrical portion  1   b  and a rectangular flange  1   e . The cylindrical portion  1   b  has formed therein an insertion hole  1   a , formed so as to have a portion with a small diameter and a portion with a large diameter. A recessed accommodating portion  1   d  having a pair of side walls  1   c  provided thereat is formed at the flange  1   e . The flange  1   e  is formed behind the cylindrical portion  1   b.    
     As shown in FIG. 1, the cylindrical outer shaft  2 , formed of a metallic material such as brass, has an insertion hole  2   d  at the center portion thereof, a relatively large diameter operating portion  2   a , an axial portion  2   b  having a smaller diameter than the operating portion  2   a , and a mounting portion  2   c  provided at one end of the axial portion  2   b . The axial portion  2   b  of the outer shaft  2  is inserted into the insertion hole  1   a  of the bearing  1  such that the outer shaft  2  can rotate therein. 
     As shown in FIGS. 5 to  8 , the cylindrical linking member  3 , which is a metallic die casting or a molded product of synthetic resin, has a non-circular hole  3   a  provided at the front center portion thereof; a recess  3   b  formed behind the hole  3   a  so as to be connected thereto and being larger than the hole  3   a ; a step  3   c  formed at the inner wall defining the recess  3   b ; a protruding mounting portion  3   e  provided at a stepped wall  3   d  formed between the recess  3   b  and the hole  3   a ; and a pair of protrusions  3   f  protruding rearward in a diametrical direction thereof. 
     As shown in FIG. 1, the linking member  3  is inserted into the insertion hole  1  of the bearing  1 , and the axial portion  2   b  of the outer shaft  2  is inserted into the hole  3   a  of the linking member  3 . The mounting portion  2   c , provided at one end of the axial portion  2   b , is caulked and retained by the bottom wall  3   d . The mounting portion  3   e  of the linking member  3  is held by the mounting portion  2   c  provided at the axial portion  2   b  in order to join the linking member  3  and the outer shaft  2 , thereby forming a joint portion of the linking member  3  and the outer shaft  2 . 
     The linking member  3 , joined to the outer shaft  2 , can rotate without slipping as the outer shaft  2  rotates. 
     As shown in FIG. 1, the inner shaft  4 , formed of a metallic material such as aluminum, has a large diameter operating portion  4   a , an axial portion  4   b  with a smaller diameter than the operating portion  4   a , a forked mounting portion  4   c  provided at one end of the axial portion  4   b , and a groove portion  4   d  provided at the base of the mounting portion  4   c  and at the outer periphery of the axial portion  4   b.    
     The axial portion  4   b  of the inner shaft  4  is inserted into the through hole  2   d  of the outer shaft  2  such that the mounting portion  4   c  and the groove portion  4   d  project from the rear side of the insertion hole  2   d , whereby the mounting portion  4   c  and the groove portion  4   d  are positioned in the recess  3   b  of the linking member  3 . 
     A C-shaped dislodgment preventing member  5 , formed of metal, is formed at the groove portion  4   d . When the inner shaft  4  is moved forward, the dislodgment preventing member  5  comes into contact with the step  3   c , provided at the inner wall of the recess  3   b  of the linking member  3 , in order to prevent the inner shaft  4  from being dislodged towards the front by using the space in the recess  3   b.    
     The inner shaft  4 , mounted to the outer shaft  2  in this manner, can rotate and move in the axial direction thereof. 
     The portion where the dislodgment preventing member  5  contacts the linking member  3  is located behind the portion where the linking member  3  and the outer shaft  2  are joined together, thereby facilitating the mounting of the outer shaft  2  and the inner shaft  4 , and reducing the size of the electrical part in a diametrical direction thereof. 
     As shown in FIGS. 9 and 10, the self-returning coil spring  6 , formed of a metallic spring wire, has a wound portion  6   a , and a pair of opposing arms  6   b  extended from both sides of the wound portion  6   a . As shown in FIGS. 1 and 27, with the wound portion  6   a  being accommodated in the accommodating portion  1   d  of the bearing  1 , the pair of arms  6   b  are mounted to the side walls  1   c  so as to be in resilient contact therewith. 
     When the coil spring  6  is mounted to the bearing  1  in this manner, the linking member  3  is positioned in the wound portion  6   a  such that the outer periphery of the linking member  3  is surrounded by the wound portion  6   a.    
     As shown in FIGS. 11 to  13 , the circular rotary member portion  7 , which is a molded product of synthetic resin such as acetal resin or glass-containing resin, has a hole  7   a  provided at the center thereof; a pair of notches  7   b  connected to the hole  7   a  and provided at opposing edges of the hole  7   a ; a movable contact  7   c  embedded in one side of the rotary member portion  7  so as to be exposed; a C-shaped protruding wall portion  7   e  provided at the other side of the rotary member portion  7  and having a cutout portion  7   d.    
     As shown in FIGS. 1 and 27, the rotary member portion  7  is combined with the linking member  3  by fitting the protrusions  3   f  of the linking member  3  into the notches  7   b . The rotary member portion  7  and the linking member  3  form a first rotary member  8 . 
     In order to form the first rotary member  8 , the rotary member portion  7  and the linking member  3  may be formed into an integral structure by embedding the linking member  3  into the rotary member portion  7 , or by integrally molding them from synthetic resin. 
     When the rotary member portion  7  is combined with the linking member  3 , the wound portion  6   a  of the coil spring  6  is accommodated within the C-shaped wall portion  7   e , and the pair of arms  6   b  pass through the cutout portion  7   d  so as to extend outwardly therefrom. 
     Clockwise or counterclockwise rotation of the outer shaft  2  causes the linking member  3  and the rotary member portion  7 , which together form the first rotary member  8 , to rotate at the same time. 
     When the linking member  3  and the rotary member portion  7  rotate at the same time, at one end of the wall portion  7   e  in which the cutout portion  7   d  of the rotary member portion  7  is formed, one of the arms  6   b  of the coil spring  6  is moved in a direction opposite to the side wall  1   c  of the bearing  1  and in opposition to the resiliency of the coil spring  6 . Thereafter, when the outer shaft  2  is released so that rotational force is no longer applied, the arm  6   b  bumps into the associated side wall  1   c  due to its resiliency and stops there, whereby the first rotary member  8  (formed by the rotary member portion  7  and the linking member  3 ) rotates until it returns to its original position. Therefore, the first rotary member  8  can return to its original state by itself. 
     As shown in FIGS. 14 to  16 , the rectangular insulating base member  9 , which is a molded product of synthetic resin, has a circular hole  9   a  provided at the center portion thereof; a pair of opposing rectangular openings  9   b  formed at both sides of the hole  9   a ; and protruding mounting portions  9   c  provided away from and between the pair of openings  9   b.    
     The sliding member  10 , formed of a springy metallic plate, has a contact portion  10   a  and a terminal portion  10   b . The contact portion  10   a  of the sliding member  10  is positioned in the openings  9   b  of the insulating base member  9 , and the terminal portion  10   b  of the sliding member  10  is embedded in the insulating base member  9  so as to protrude outwardly therefrom. 
     A jig (not shown) is inserted into the openings  9   b  from the rear side thereof. The contact portion  1   a  is formed such that a portion thereof protrudes from the front side of the insulating base member  9 . 
     As shown in FIG. 28, the annular clicking member  11 , formed of a springy metallic plate, has an annular portion  11   b  with a hole  11   a  at the center portion thereof; a pair of mounting portions or holes  11   c  provided in the annular portion  11   b  so as to oppose each other, with the hole  11   a  being formed therebetween: and a protrusion  11   d  provided at the annular portion  11   b  so as to be disposed midway between the pair of mounting portions  11   c.    
     The protruding mounting portions  9   c  of the insulating base member  9  are inserted through their respective mounting portions  11   c , or holes, of the clicking member  11 , and one of the ends of each mounting portion  9   c  is, for example, pressed so that it spreads outward, in order to mount the clicking member  11  to the insulating base member  9 . When the mounted clicking member  11  is mounted, a portion thereof is disposed at one of the surface sides of the insulating base member  9  and another portion thereof is disposed at the opposite surface side of the insulating base member  9  from where the contact portions  10   a  of the sliding member  10  protrude. 
     It is to be noted that the mounting portions  9   c  may be formed as recesses. In this case the mounting portions  11   c  are formed as protrusions. 
     As shown in FIG. 1, with the contact portions  10   a  opposing the movable contact  7   c  of the movable member  7 , the insulating base member  9  is disposed on the rear side of the flange  1   e  of the bearing  1 . The insulating base member  9 , at which the sliding member  10  is provided, and the first rotary member  8  form a first rotary electrical part D 1 . 
     When insulating base member  9  is disposed in this manner, the linking member  3  and the rotary member portion  7  are covered by the insulating base member  9 , and the contact portions  10   a  of the sliding member  10  can come into contact with and separate from the movable contact  7   c.    
     When the rotary member portion  7 , forming the first rotary member  8 , is rotated, the movable contact  7   c  rotates in order to come into contact with and separate from the contact portions  10   a , whereby a switching operation is performed at the first rotary electrical part D 1 . 
     As shown in FIGS. 17 and 18, the second rotary member  12 , which is a molded product of synthetic resin, has a disk-shaped portion  12   b  having a bumpy portion  12   a  formed at the front side thereof; an axial portion  12   c  integrally formed with the disk-shaped portion  12   b ; and a non-circular hole  12   d  formed in the center of the second rotary member  12  so as to extend along the disk-shaped portion  12   b  and the axial portion  12   c.    
     The contact member  13 , formed of a metallic plate and having a code pattern formed thereon, is embedded in the second rotary member  12 , with its contact portion being exposed at the rear surface of the disk-shaped portion  12   b.    
     As shown in FIG. 1, with the disk-shaped portion  12   b  being disposed at the rear side of the insulating member  9 , the axial portion  12   c  of the second rotary member  12  having the above-described structure is inserted and guided through the hole  9   a  of the insulating base member  9  in order to rotatably mount the second rotary member  12  to the insulating base member  9 . 
     The clicking member  11  is disposed between the second rotary member  12  and the insulating base member  9 . When the protrusion  11   d  of the clicking member  11  engages the bumpy portion  12   a  of the second rotary member  12 , and the second rotary member  12  is rotated, the protrusion  11   d  repeatedly engages and disengages the bumpy portion  12   a , whereby a tactile feel is provided. 
     As shown in FIGS. 19 and 20, the actuating member  14 , which is a molded product of synthetic resin, has a body portion  14   a ; a protruding portion  14   b  which protrudes forwardly from the center of the body portion  14   a ; recesses  14   c  provided on both sides of the protruding portion  14   b ; a pair of protruding linear portions  14   d  formed at both opposite outer sides of the body portions  14   a ; and a protrusion  14   e  at the rear side of the body portion  14   a.    
     As shown in FIG. 1, the actuating member  14  is inserted into the hole  12   d  of the second rotary member  12  in order to join the protruding linear portions  14   d  to the edge of the hole  12   d  through splines. 
     The protruding portion  14   b  of the actuating member  14  is fitted to the space between the tines of the forked mounting portion  4   c  of the inner shaft  4 , and the forked mounting portion  4   c  is fitted to the recesses  14   c  of the actuating member  14 . 
     When the inner shaft  4  is rotated, the protruding portion  14   b  and the recesses  14   c  of the actuating member  14  are fitted to the inner shaft  4 , so that the actuating member  14  rotates with the inner shaft  4 , causing the second rotary member  12 , joined through splines, to be rotated. 
     When the inner shaft  4  is moved rearward in the axial direction thereof, the actuating member  14  is pushed and moved rearward by the inner shaft  4  at the same time. In addition, the actuating member  14  slides within the second rotary member  12  as a result of being joined to the second rotary member  12  through splines. 
     As shown in FIGS. 1 and 21 to  23 , the insulating case  15 , which is a molded product of synthetic resin, has a side wall  15   b  with a recess  15   a  formed at the center and front side thereof; and a bottom wall  15   d  with a pair of rectangular openings  15   c  formed therein. 
     As shown in FIGS. 21 to  23 , the contact member  16 , formed of a springy metallic plate, has a contact portion  16   a  and a terminal portion  16   b . The contact portion  16   a  of the contact member  16  is positioned in the rectangular openings  15   c  of the bottom wall  15   d , while the terminal portion  16   b  is embedded in the insulating case  15  so as to protrude outward from the insulating case  15 . 
     A jig (not shown) is inserted into the openings  15   c  from the rear side thereof, and the contact portions  16   a  are formed such that a portion thereof protrudes from the front side of the bottom wall  15   d.    
     As shown in FIG.  1  and FIGS. 21 to  23 , the contact member  17 , formed of a metallic plate, has a contact portion  17   a  and a terminal portion  17   b , while the contact member  18 , also formed of a metallic plate, has a contact portion  18   a  and a terminal portion  18   b . The contact members  17  and  18  are mounted to the insulating case  15  so as to be embedded therein. 
     With the contact portion  17   a  of the contact member  17  being exposed at the center portion of the bottom wall  15   d  of the insulating case  15 , the contact member  17  is embedded in the insulating case  15 . At the outer periphery of the contact portion  17   a , while the contact portion  18   a  of the contact member  18  is exposed at the bottom wall  15   d , the contact member  18  is mounted to the insulating case  15  so as to be embedded in the insulating case  15 . 
     As shown in FIG. 1, the contact members  17  and  18  and the insulating case  15 , having the contact member  16  embedded therein, are successively disposed on one another from the rear side of the insulating base member  9 . When these component parts are disposed in this manner, the contact portions  16   a  of the contact member  16  can come into contact with and separate from the contact member  13 . When the second rotary member  12  is rotated, the contact member  13  comes into contact with and separates from the contact member  16 , whereby a switching operation is performed. 
     The insulating case  15 , to which the contact member  16  is mounted, and the second rotary member  12 , to which the contact member  13  is mounted, form a second rotary electrical part D 2  serving as rotary encoder. 
     Although in the embodiment the contact member  13  is described as being mounted to the second rotary member  12 , and the contact member  16  is described as being mounted to the insulating case  15 , the contact member  16  may be mounted to the second rotary member  12 , and the contact member  13  may be mounted to the insulating case  15 . 
     In the second rotary electrical part D 2 , the second rotary member  12  may have a resistor, and the insulating case  15  may be provided with a rotary variable resistor having mounted thereto a sliding piece which slidably contacts the resistor. 
     As shown in FIG. 1, the movable contact  19 , formed of a springy metallic plate, is dish-like in shape and has a concavely formed center portion. The movable contact  19  is accommodated in the recess  15   a  of the insulating case  15 . The center portion of the movable contact  19  is separated from the contact member  17 , and the peripheral portions of the movable contact  19  are mounted to the contact member  18  so as to be normally in contact therewith. 
     As shown in FIG. 1, when the insulating case  15  is disposed on the rear side of the insulating base member  9 , the center portion of the movable contact  19  is in contact with the actuating member  14 . The resiliency of the movable contact  19  causes the actuating member  14  and the inner shaft  4  to be normally pushed towards the front, so that the dislodgment preventing member  5  is pushed against the step  3   c  of the linking member  3 . 
     When the inner shaft  4  is pushed rearwards in the axial direction thereof, causing the actuating member  14  to move in the same direction, the center portion of the movable contact  19  is pushed in opposition to its resiliency by the actuating member  14 , and comes into contact with the contact member  17 . This renders the contact members  17  and  18  conductive, whereby a push switch S is turned on. When the inner shaft  4  is released, the resiliency of the movable contact  19  causes the actuating member  14  and the inner shaft  4  to return to their original positions. This causes the movable contact  19  to separate from the contact member  17 , whereby the push switch S is turned off. 
     The case  15 , to which the contact members  17  and  18  are mounted, and the movable contact  19  form the push switch S. 
     As shown in FIG. 10, the cover  20 , which is a molded product of synthetic resin, is plate-like in shape. It is disposed on the rear side of the insulating case  15  in order to prevent entry of dust or the like into the insulating case  15  from the hole  15   c  of the insulating case  15 . 
     As shown in FIGS. 24 to  26 , the mounting plate  21 , formed by punching out and bending into a U shape a metallic plate, has front plate portion  21   b  with a hole  21   a  formed therein; and a pair of mounting legs  21   c  formed by bending portions of the mounting plate  21  rearward from the front plate portion  21   b.    
     As shown in FIG. 1, the outer shaft  2  and the cylindrical portion  1   b  of the bearing  1  are inserted into the hole  21   a  of the mounting plate  21 . The front plate portion  21   b  is mounted on the front side of the flange  1   e  of the bearing  1 . The flange  1   e , the insulating base member  9 , the insulating case  15 , and a side portion of the cover  20 , which are supported by the mounting legs  21   c , are retained by the back surface of the cover  21  by bending one end of each mounting leg  21   c.    
     The multiple operation type electrical part having the above-described structure is assembled by successively disposing the bearing  1 , the insulating base member  9 , the insulating case  15 , and the cover  20 , which are formed into an integral structure by the mounting plate  21 . 
     A description will now be given of the operation of the multiple operation type electrical part having the above-described structure. In FIG. 1, clockwise or counterclockwise rotation of the outer shaft  2  causes simultaneous rotation of the linking member  3  and the rotary member portion  7 , both of which together form the first rotary member  8 . 
     The rotary member portion  7  rotates against the resiliency of the arm  6   b  of the coil spring  6 . The movable contact  7   c  rotates and comes into contact with and separates from the contact portions  10   a , whereby switching operations are performed at the first rotary electrical part D 1 . 
     When the outer shaft  2  is released so that rotational force is no longer applied thereto, the arm  6   b , which has been moved, causes the first rotary member  8  (the rotary member portion  7  and the linking member  3 ) to return to its original position and switching state. The first rotary member  8 , the linking member  3 , and the outer shaft  2  are self-returning component parts capable of returning to their original positions by themselves. 
     Clockwise or counterclockwise rotation of the inner shaft  4  causes rotation of the second rotary member  12  through the actuating member  14  to which the inner shaft  4  is joined. 
     Here, the bumpy portion  12   a  of the second rotary member  12  engages and disengages the clicking member  11  to provide a tactile feel when the second rotary member  12  is rotated. The contact member  13 , provided at the second rotary member  12 , rotates in order to come into contact with and separate from the sliding member  16 . This results in switching operations at the second rotary electrical part D 2 . 
     When the inner shaft  4  is pushed rearward in the axial direction thereof, the actuating member  14  moves in the same direction to push the center portion of the movable contact  19  in opposition to the resiliency of the movable contact  19 . This causes the center portion of the movable contact  19  to come into contact with the contact member  17 , thereby rendering the contact members  17  and  18  conductive, and turning on the push switch S. 
     When the inner shaft  4  is released, the resiliency of the movable contact  19  causes the actuating member  14  and the inner shaft  4  to return to their original positions. This causes the movable contact  19  to separate from the contact member  17  and the push switch S to be turned off. 
     Thus, the multiple operation type electrical part is operated in the above-described way. 
     The multiple operation type electrical part having the above-described structure is used in operating a car stereo. More specifically, the first rotary electrical part D 1  is used for radio tuning. The second rotary electrical part D 2  is used, for example, for volume or bass adjustments. The push switch S is used for switching, for example, volume or bass modes. 
     Since the various operations of the multiple operation type electrical part can be carried out at the operating portions concentrated at a particular area, the multiple operation type electrical part is used particularly in car stereos. 
     FIG. 29 illustrates another embodiment of the multiple operation type electrical part in accordance with the present invention. A movable contact  22  and a dome-shaped, rubber movable member  23  are disposed in the insulating case  15 . The movable contact  22  has a contact portion  22   a  formed by cutting a portion of the movable contact  22  so as to be raised. The peripheral portions of the movable contact  22  are in contact with a contact member  18 . When the actuating member  14  is moved in the axial direction by the inner shaft  4 , the actuating member  14  pushes and deforms the movable member  23 . The movable member  23  causes the contact portion  22   a  to come into contact with the contact portion  17   a  of a contact member  17 , whereby the contact members  17  and  18  are rendered conductive. When the inner shaft  4  is released, the contact portion  22   a  returns to its original state due to its resiliency, and the contact members  17  and  18  are brought out of conduction. The movable member  23  also returns to its original state due to its resiliency, causing the actuating member  14  and the inner shaft  4  to move back to their original positions. 
     In this structure, the same reference numerals as those used in the figures illustrating the structure of the electrical part of the previous embodiment are used to denote parts or component parts which are the same as or equivalent to those of the previous embodiment. 
     According to the multiple operation type electrical part of the present invention, a clicking member  11  is disposed between the insulating base member  9 , being a component part of the first rotary electrical part D 1 , and the second rotary member  12 , being a component part of the second rotary electrical part D 2 . Therefore, it is possible to provide a very small multiple operation type electrical part whose size in the axial direction is reduced. 
     The clicking member  11  is mounted to the insulating base member  9  of the first rotary electrical part D 1 , and is formed so as to engage the bumpy portion  12   a  of the second rotary member  12  of the second rotary electrical part D 2 . Therefore, it is possible to provide a small multiple operation type electrical part which uses fewer parts, is less costly, and has greater productivity, compared to conventional multiple operation type electrical parts. 
     The clicking member  11  is mounted to a portion of the insulating base member  9  separated from the pair of openings  9   b  accommodating the contact portion  10   a . Therefore, it is possible to provide a multiple operation type electrical part which is made small in the diametrical direction as a result of reducing the size of the area where the clicking member  11  is mounted in the diametrical direction. 
     Dislodgment of the inner shaft  4  is prevented by using the space of the recess  3   b  at the center portion of the first rotary member  8 . Therefore, it is possible to provide a multiple operation type electrical part which is very small, with its size in the axial direction reduced. 
     The dislodgment preventing member  5 , mounted to the inner shaft  4 , is formed so as to be in contact with the inner wall defining the recess  3   b  of the first rotary member  8 . There, it is possible to provide a multiple operation type electrical part which is small and has a simple structure. 
     The first rotary member  8  is formed by the rotary member portion  7  and the linking member  3 , and dislodgment of the inner shaft  4  is prevented by using the space of the recess  3   b  of the linking member  3 . Therefore, it is possible to provide a small multiple operation type electrical part which can prevent the inner shaft  4  from being dislodged by using the space within the linking member  3 . 
     The arm  6   b  of the self-returning coil spring  6  are moved by the rotary member portion  7  forming the first rotary member  8 . Therefore, it is possible to provide a small multiple operation type electrical part which can be assembled more easily.