Patent Publication Number: US-6911612-B2

Title: Switch

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a switch such as a seesaw type switch, a lever type switch or the like used in a power window switch or the like. 
   2. Description of the Related Art 
   There is a conventional seesaw type switch as shown by, for example, FIG.  25 .  FIG. 25  is a sectional view in a state of attaching a switch knob, showing a neutral holding structure the switch knob. 
   As shown by  FIG. 25 , according to a seesaw type switch  201 , a switch knob  203  is axially supported by a knob attaching portion  207  of a switch case  205  pivotably around, for example, a pivoting center C and capable of operating pivoting movement. Therefore, when the switch knob  203  is operated to push to thereby pivot around the pivoting center C in the counterclockwise direction, power window of an automobile is operated to lower. Further, when the switch knob  203  is pulled up to thereby pivot around the pivoting center C in the clockwise direction, the power window is operated to lift. 
   Such a switch knob  203  is held by a neutral holding mechanism  209  at a neutral position at which the power window is not operated to lift or lower. That is, a spring containing portion  211  is provided in the switch case  205 . A coil spring  213  is contained in the spring containing portion  211 . A steel ball  215  is arranged at an upper end of the spring containing portion  211 . The steel ball  215  is brought into elastic contact with a recessed portion  217  of the switch knob  203 . 
   Therefore, by an urging force of the coil spring  213 , the steel ball  215  is brought into elastic contact with the recessed portion  217  of the switch knob  203  and the switch knob  203  is held at the neutral position. 
   In operating the switch knob  203 , the recessed portion  217  of the switch knob  203  can be moved relative to the steel ball  215  to thereby enable to pivot the switch knob  203 . Further, after the switch knob  203  is operated to press or operated to pull up, when the switch knob  203  is detached, the switch knob  203  can automatically return to the neutral position of  FIG. 25  by elastic contact of the steel ball  215  with the recessed portion  217 . 
   In this way, by the neutral holding mechanism  209 , the switch knob  203  can be held at the neutral position and the play of the switch knob  203  can be prevented. 
   However, according to the above-described structure, in integrating operation, there is constituted a procedure of containing the coil spring  213  in the spring containing portion  211 , thereafter inserting the steel ball  215  thereinto, coating grease and integrating the switch knob  203  and therefore, there poses a problem that a number of integrating steps is large. 
   Further, according to the structure as shown in  FIG. 25 , there is a concern of bringing about a failure in step such as a failure in inserting the coil spring  213 , detachment of the steel ball  215  or the like and there is a concern of bringing about trouble in operation of the switch knob  203 . 
   Further, a number of parts of the coil spring  213 , the steel ball  215  and the like is large and integration and parts control are complicated to thereby cause to increase cost. 
   SUMMARY OF THE INVENTION 
   It is an object of the invention to provide a switch of a seesaw type switch, a lever type switch or the like capable of achieving a reduction in cost by reducing a number of parts, reducing a number of integration steps, restraining occurrence of a failure in step and facilitating integration and parts control. 
   The invention of a first aspect is concerned with a switch wherein an operating lever portion of a switch knob is inserted from an opening of a knob attaching portion provided at a switch case and the switch knob is axially supported by the knob attaching portion to be capable of operating to pivot, an elastic portion is integrally provided with either one of the switching knob or the switch case and a receive portion for receiving a reactive force of the elastic portion is provided at the other end thereof, and when the switch knob is operated to pivot, the switch knob is urged to a neutral position relative to the knob attaching portion by an elastic force by deforming the elastic portion to the receive portion. 
   According to the invention of a second aspect, in the switch according to the first aspect, the elastic portion is an elastic projection projected from the switch knob into the opening of the knob attaching portion, and the receive portion is an engaging hole provided to the knob attaching portion for fitting and holding a front end of the elastic projection. 
   According to the invention of a third aspect, in the switch according to the second aspect, the engaging hole is provided at a bottom portion of a spring containing portion capable of containing a coil spring used in a switch knob having other specifications, and the bottom portion of the spring containing portion is formed in a shape of a taper hole converging toward the engaging hole. 
   According to the invention of a fourth aspect, in the switch according to the first aspect, the elastic portion is an elastic leg portion projected from the switch knob to an outer face of the switch case, wherein the receive portion is an outer face of the switch case, and the elastic leg portion is brought into elastic contact with the outer face of the switch case. 
   According to the invention of a fifth aspect, in the switch according to the fourth aspect, the outer face of the switch case is provided with a groove for fitting and guiding a front end of the elastic leg portion. 
   According to the invention of a sixth aspect, in the switch according to the first aspect, the elastic portion is formed by providing a through hole at an edge portion of the switch knob, wherein at either one of the elastic portion and the receive portion, a projection in contact with the other side is provided, and the elastic portion is deformed by changing a situation of bringing a side of the elastic portion or a side of the receive portion into contact with the projection by operating to pivot the switch knob. 
   According to the invention of a seventh aspect, in the switch according to any one of the first to sixth aspects, a fixed contact is fixedly supported by a terminal block engageably and detachably attached to the switch case, a movable piece having a movable contact brought into contact with or separated from the fixed contact is pivotably supported and a slider having an elastic contact member brought into elastic contact with the movable piece and a cooperative engaging portion for engaging with the operating lever portion is movably supported, and the slider is moved in cooperation with the operating lever portion by operating to pivot the switch knob, the movable piece is pivoted by moving the elastic contact member on the movable piece and the movable contact is brought into contact with and separated from the fixed contact. 
   According to the invention of the first aspect, the operating lever portion of the switch knob is inserted from the opening of the knob attaching portion provided at the switch case and the switch knob can axially be supported by the knob attaching portion to be capable of operating to pivot. Therefore, the contact can be connected and disconnected by operating to pivot the switching knob relative to the knob attaching portion. Further, the elastic portion is integrally provided to either one of the switch knob side and the switch case side, the receive portion for receiving the reactive force of the elastic portion is provided at the other end thereof, the switch knob is urged to the neutral portion relative to the knob attaching portion by the elastic force by deforming the elastic portion to the receive portion when the switch knob is operated to pivot and therefore, when the finger is separated after operating to pivot the switch knob, the switch knob can be returned to the neutral position and held relative to the knob attaching portion. Further, in integrating operation, the elastic portion integral to the switch knob is only engaged with the receive portion on the switch case side and therefore, a number of integrating steps is small and occurrence of a failure in step can considerably be restrained. Further, since a number of parts is small, integration and parts control are facilitated and a significant reduction in cost can be achieved. 
   According to the invention of the second aspect, in addition to the effect of the invention of the first aspect, the elastic portion is the elastic projection projected from the switch knob into the opening of the knob attaching portion, the receive portion is the engaging hole provided at the knob attaching portion for fitting and holding the front end of the elastic projection and therefore, in inserting the operating lever portion of the switch knob from the opening of the knob attaching portion, the elastic projection can be fitted to and held by the engaging hole. Therefore, integrating is facilitated and occurrence of a failure in step can firmly be restrained. Further, the switch knob can automatically be returned to the original neutral portion by the elasticity of the elastic projection. 
   According to the invention of a third aspect, in addition to the effect of the invention of the second aspect, the engaging hole is provided at the bottom portion of the spring containing portion capable of containing the coil spring used in the switch knob having other specification, the bottom portion of the spring containing portion is formed in the shape of the taper hole converging toward the engaging hole and therefore, in integration, when the elastic projection is inserted into the spring containing portion and the front end is butted to the bottom portion, the front end of the elastic projection can be fitted to the engaging hole by being guided by the bottom portion in the shape of the taper hole. Further, when the elastic projection is inserted with the spring containing portion larger than the engaging hole as a measure, as-described above, the elastic projection can be inserted into the engaging hole. Therefore, integration can further be facilitated and occurrence of a failure in step can be restrained further firmly. Further, the spring containing portion can contain the coil spring used in the switch knob having another specification and the switch knob having the other specification, for example, a switch knob of an auto switch can be attached by commonly using the switch case. 
   According to the invention of a fourth aspect, in addition to the effect of the invention of the first aspect, the elastic portion is the elastic leg portion projected from the switch knob to the outer face of the case, the receive portion is the outer face of the case, the elastic leg portion is brought into elastic contact with the outer face of the case and therefore, by only carrying out an operation of attaching the switch knob to the knob attaching portion, the elastic leg portion can be brought into elastic contact with the outer face of the switch case. Therefore, special consideration for bringing the elastic leg portion to the outer face of the switch case is dispensed with, integration is further simplified and occurrence of a failure in step can further firmly be restrained. Further, by making the elastic leg portion elastically spring to the outer face of the switch case in the state of integrating the switch knob, the elastic spring force can be operated to a portion of the switch knob axially supported by the switch case and play of the switch knob relative to the knob attaching portion can further firmly be prevented. 
   According to the invention of a fifth aspect, in addition to the effect of the invention of the fourth aspect, the groove for fitting and guiding the front end of the elastic leg portion is provided at the outer face of the switch case and therefore, movement of the elastic leg portion can be stabilized and operation feeling of the switch knob can be promoted. Further, in integrating the switch knob, the hand of the operator can be prevented from touching the elastic leg portion and destruction of the elastic leg portion can be prevented. 
   According to the invention of a sixth aspect, in addition to the effect of the invention of the first aspect, the elastic portion is formed by providing the through hole at the edge portion of the switch knob, at either one of the elastic portion and the receive portion, the projection in contact with the other side is provided and the elastic portion can be deformed by changing the situation of bringing the side of the elastic portion or the side of the receive portion into contact with the projection by operating to pivot the switch knob. 
   Therefore, the elastic portion can be brought into a both end holding state and rigidity of the elastic portion per se can be increased. Therefore, the wall thickness of the elastic portion or the like can be reduced and light-weighted formation and small-sized formation can further be expedited. Further, since the rigidity of the elastic portion is increased, a jig pin at the elastic portion is easy to be drawn from a mold and fabrication can be facilitated. 
   According to the invention of a seventh aspect, in addition to the effect of the invention according to any one of the first to sixth aspects, the fixed contact is fixedly supported by the terminal block attached engageably and detachably to the switch case, the movable piece having the movable contact brought into contact with and separated from the fixed contact is pivotably supported, the slider having the elastic contact member brought into elastic contact with the movable piece and the cooperative engaging portion for engaging the operating lever portion is movably supported, the slider is moved in cooperation with the operating lever portion by operating to pivot the switching knob, and the movable contact can be brought into contact with and separated from the fixed contact by pivoting the movable piece by moving the elastic contact member on the movable piece. In integration, the operating lever portion of the switch knob inserted from the opening of the knob attaching portion is engaged with the cooperative engaging portion of the slider supported by the terminal block and by firmly holding the switch knob at the neutral position relative to the switch case as described above, engagement to the cooperative engaging portion of the operating lever portion can easily be carried out and integration can simply be carried out. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a power window switch according to a first embodiment of the invention. 
       FIG. 2  is a sectional view of essential portions taken along a line SA—SA of  FIG. 1  according to the first embodiment. 
       FIG. 3  is a sectional view of essential portions taken along a line SB—SB of  FIG. 1  according to the first embodiment. 
       FIG. 4  is a sectional view of essential portions at a periphery of a switch knob taken along the line SA—SA of  FIG. 1  according to the first embodiment. 
       FIG. 5  is a plane view of the switch knob according to the first embodiment. 
       FIG. 6  is a sectional view taken along a line SC—SC of  FIG. 5  according to the first embodiment. 
       FIG. 7  is a sectional view taken along a line SD—SD of  FIG. 5  according to the first embodiment. 
       FIG. 8  is a sectional view taken along a line SE—SE of  FIG. 5  according to the first embodiment. 
       FIG. 9  is a side view of a switch case according to the first embodiment. 
       FIG. 10  is a plane view of the switch case according to the first embodiment. 
       FIG. 11  is a sectional view of essential portions taken along a line SF—SF of  FIG. 10  according to the first embodiment. 
       FIG. 12  is a sectional view taken along a line SG—SG of  FIG. 10  according to the first embodiment. 
       FIG. 13A  is a sectional view at a periphery of a switch knob in a state in which an auto switch is attached to a knob attaching portion; and  FIG. 13B  is an enlarged view of a periphery of a click portion according to the first embodiment. 
       FIG. 14  is a perspective view of a switch knob according to a second embodiment of the invention. 
       FIG. 15  is a side view of essential portions in a state in which the switch knob is attached to a switch case according to the second embodiment. 
       FIG. 16  is a disassembled perspective view of essential portions according to the second embodiment. 
       FIG. 17  is a side view of essential portions in which a switch knob is attached to a switch case according to an embodiment of a modified example of the second embodiment. 
       FIG. 18  is a side view of essential portions in a state in which a switch knob is attached to a switch case according to an embodiment of other modified example of the second embodiment. 
       FIG. 19  is a side view of a power window switch according to a third embodiment of the invention. 
       FIG. 20  is a perspective view of a periphery of a switch knob according to the third embodiment. 
       FIG. 21  is a rear view of the periphery of the switch knob according to the third embodiment. 
       FIG. 22  is a side view of essential portions in a state in which the switch knob is attached to a switch case according to the third embodiment. 
       FIG. 23  is a side view of essential portions for explaining operation in the state in which the switch knob is attached to the switch case according to the third embodiment. 
       FIG. 24  is a side view of essential portions in a state in which a switch knob is attached to a switch case according to a fourth embodiment of the invention. 
       FIG. 25  is a sectional view of essential portions at a periphery of a switch knob according to a conventional example. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   (First Embodiment) 
     FIG. 1  shows a perspective view of a power window switch  1  for, for example, an automobile as a switch according to a first embodiment of the invention. The power window switch  1  is provided, for example, at a window of a driver seat, a front passenger seat, a rear seat or the like of an automobile. Further, the power window switch  1  is installed at an arm rest of a door or a vehicle compartment side of a door of, for example, a driver seat, a front passenger seat, a rear seat or the like of an automobile. Further, a position and a direction of a respective portion or member, mentioned later, indicates a direction in the attached drawing and upper and lower directions, left and right directions and front and rear directions are changed by the state of attaching the power window switch  1  to an automobile and are not limited to illustration. An explanation will be given of the embodiment with an arbitrary illustrated state of the attached drawing as a reference as follows. 
   As shown by  FIG. 1 , according to the power window switch  1 , a switch knob  7  is axially supported by a knob attaching portion  5  of a switch case  3  constituting an upper case to be capable of operating pivoting movement. 
   The switch knob  7  is provided with an elastic pin portion  9  constituting an elastic projection as an elastic portion. The elastic pin portion  9  is for holding a neutral position of the switch knob  7  relative to the switch case  3  by elastic force and providing an operating lever  87  (see  FIG. 2 ) vertically to the switch case  3 . According to the embodiment, the elastic pin portion  9  is projected from an upper portion of an inner face of the switch knob  7  into an opening  11  of the knob attaching portion  5 . The elastic pin portion  9  is a round bar a total of which is constituted by a taper shape to facilitate to draw a mold when the elastic pin portion  9  is molded by resin by using the mold. Further, a section of the elastic pin portion  9  may be constituted by a polygonal shape. 
   An engaging hole  13  is provided on a side of the switch case  3  as a receive portion. The engaging hole  13  is for engaging the elastic pin portion  9 . The elastic pin portion  9  is fitted to the engaging hole  13  to be capable of moving in the up and down direction such that the elastic pin portion  9  can be operated to bend smoothly when the switch knob  7  is operated. Further, the elastic pin portion  9  may be provided with elastic force capable of supporting the switch knob  7  without play in a state of the neutral position at which the operating lever  87  is made vertical when the switch knob  7  is integrated to an upper side of the switch case  3 . The elastic force of the elastic pin portion  9  is set to be as small as about one-tenth of that of a coil spring  77 , mentioned later, and the elastic pin portion  9  is formed to be easy to deform to bend and to provide durability. According to the embodiment, the engaging hole  13  is for fittedly holding a front end of the elastic pin portion  9  and is provided at a bottom portion  17  of a spring containing portion  15  of the knob attaching portion  5 . 
   The spring containing portion  15  is constructed by a constitution capable of containing a coil spring used for a switch knob having another specification. As the switch knob having the other specification, there is provided a switch knob of an auto switch having a specification for lifting and lowering power window on the side of the driver seat when, for example, the power window switch  1  is attached to the door on the side of the driver seat. 
   A further explanation will be given of the power window switch  1  in reference to FIG.  2  and FIG.  3 .  FIG. 2  is a partial sectional view taken along a line SA—SA of FIG.  1  and  FIG. 3  is a sectional view taken along a line SB—SB of FIG.  1 . 
   As shown by FIG.  2  and  FIG. 3 , according to the knob attaching portion  5 , boss portions  23  are projected from a side wall  19  and a middle wall  21 . According to the knob  7 , fitting holes  29  are provided at a side wall  25  and a middle wall  27 . The fitting holes  29  of the switch knob  27  are fitted to the boss portions  23  of the knob attaching portion  5  and the switch knob  7  is axially supported pivotably by the knob attaching portion  5 . By the axial support, the switch knob  7  can pivotably be operated relative to the knob attaching portion  5 . 
   The switch case  3  is attachably and detachably attached with a terminal block  31  constituting a lower case. The attachment is carried out by engaging an engaging projection  35  of the terminal block  31  to an engaging window  33  provided at the switch case  3 . 
   The terminal block  31  is insert-molded with a conductive plate  37  conducted to a terminal and a fixed contact by insulating resin. The terminal block  31  is provided with a containing wall portion  39 . The containing wall portion  39  is partitioned into left and right portions by a middle wall  41 . 
   On the left side of the middle wall  41  of the containing wall portion  39  (on the left side of the containing wall portion  39  in FIG.  3 ), a contact for lifting is contained and on the right side, a contact for lowering is contained. Fixed contacts  45   a  and  45   b , fixed contact portions  47   a  (illustration is omitted for lifting), and fulcrum serving fixed contacts  48   a  and  48   b , are fixedly supported by a bottom wall  43  of the containing wall portion  39 . 
   Guide walls  49  and  51  are projected upwardly at both of front and rear sides of the containing wall portion  39  (FIG.  2 ). The guide walls  49  and  51  are inclinedly formed with guide faces  53 . Cover support faces  55  are provided on front and rear sides of the containing wall portion  39  on inner sides of the guide walls  49  and  51 . There is constituted a structure in which wall portions  59  on front and rear sides of a slider cover  57  are brought into contact with the cover support faces  55 . 
   The slider cover  57  is molded by resin. The slider cover  57  is respectively provided with two pieces of engaging holes  61  at left and right wall portions  60  (FIG.  3 ). The engaging holes  61  are engaged with engaging claws  63  of the containing wall portion  39 . Therefore, the slider cover  57  is attachably and detachably attached to the containing wall portion  39 . Thereby, there is formed a containing space  65  between the containing wall portion  39  and the slider cover  5 - 7 . The slider  67  and a movable pieces  69   a  and  69   b  are contained in the containing space  65 . The slider cover  57  is provided with a window  71 . 
   The slider  67  is molded by resin and the slider  67  is provided with a pair of left and right ball support portions  73 . Steel balls  75  constituting elastic contact members are contained in the ball support portions  73  via coil springs  77  as urge members. The coil spring  77  functions as a click spring, a spring for contact and a spring for automatically returning the switch knob  7  to a neutral position. 
   The slider  67  is projected with a slider plate portion  79  on a lower face side of the slider cover  57  in the front and rear direction. Slider projections  81  are projected on left and right sides of the slider  67 . The slider projection  81  is interposed between the containing wall portion  39  and a lower face of the slider cover  57  to be guided to slide. 
   The slider  67  is provided with a head portion  83 . The head portion  83  is projected from the window  71  of the slider cover  57  to the side of the switch knob  7  along with upper sides of the ball support portions  73 . The head portion  83  is provided with an operating recessed portion  85  constituting a cooperative engaging portion. The operating lever  87  of the switch knob  7  is fitted to the operating recessed portion  85 . The lower end of the operating lever  87  is formed substantially in a circular shape to facilitate its insertion into the operating recessed portion  85  and such that the operation lever  87  can be pivoted. 
   The movable piece  69   a  is pivotably supported by the fulcrum serving fixed contact  48   a  and the movable piece  69   b  is pivotably supported by the fulcrum serving fixed contact  48   b . The movable pieces  69   a  and  69   b  are formed by pressing a plate member of a conductive metal. A movable contact  89  is provided on one side in the front and rear direction of the movable piece  69   a  and a movable contact portion  91  is provided on other side thereof. The movable contact  89  is constructed by a constitution of being brought into contact with and separated from the fixed contact  45   a  by pivoting the movable piece  69   a . Such a structure is similar also on the side of the movable piece  69   b  installed along with the movable piece  69   a . However, in order to carry out lifting and lowering operation, on the side of the movable piece  69   b , a relationship of arranging the movable contact  89  and the fixed contact  45   b  and the movable contact portion and the fixed contact portion, is reversed and in view of the state of  FIG. 2 , the movable contact and the fixed contact are disposed on the right side and the movable contact portion and the fixed contact portion are disposed on the left side. 
   Click grooves  92  are provided at end edges of the movable pieces  69   a  and  69   b . The click groove  92  is a click face for giving a click in elastic contact, movement of the steel ball  75 , providing a click feeling to operation of the switch knob  7  and automatically returning the movable pieces  69   a  and  69   b , the slider  67  and the switching knob  7  to the neutral position by bringing the steel ball  75  into press contact therewith. The click groove  92  is formed by an inclined face  93  cut in a V-like shape at center thereof and inclined faces  95  and  97  having slightly gradual inclinations frontward and rearward therefrom. The respective steel balls  75  of the slider  67  are constructed by a constitution of pivoting the movable pieces  69   a  and  69   b  by moving on the click grooves  92  of the movable pieces  69   a  and  69   b  to thereby bring the respective movable contacts  89  into contact with the fixed contacts  45   a  and  45   b  and separating the respective movable contacts  89  therefrom. 
   A further explanation will be given here of details of a neutral holding structure constituting a characteristic of the invention also in reference to FIG.  4  through FIG.  12 . 
     FIG. 4  is a sectional view showing a periphery of the switch knob taken along the line SA—SA of  FIG. 1  along with the switch case,  FIG. 5  is a plane view of the switch knob,  FIG. 6  is a sectional view taken along a line SC—SC of  FIG. 5 ,  FIG. 7  is a sectional view taken along a line SD—SD of  FIG. 5 ,  FIG. 8  is a sectional view taken along a line SE—SE of  FIG. 5 ,  FIG. 9  is a side view of the switch case,  FIG. 10  is a plane view of the switch case,  FIG. 11  is a sectional view of essential portions taken along a line SF—SF of FIG.  10  and  FIG. 12  is a sectional view taken along a line SG—SG of FIG.  10 . 
   First, as shown by  FIG. 4 , the switch knob  7  is axially supported by the bosses  23  pivotably relative to the knob attaching portion  5  and an axis line of the elastic pin portion  9  passes a pivoting center C 1  of the switch knob  7 . Therefore, elastic recovery force of the elastic pin portion  9  can be exerted as a moment around the pivoting center C 1 , the operating lever  87  can be integrated to be vertical to the switch case  3  and the switch knob  7  can firmly and smoothly be returned to the neutral position. Further, the pivoting center C 1  intersects with substantially the center in the length direction of the elastic pin portion  9  and therefore, elastic force of the elastic pin portion  9  can sufficiently be utilized for holding the neutral position of the switch knob  7 . 
   When such a switch knob  7  is viewed as a single member, the switch knob  7  is as shown by FIG.  5  through FIG.  8 . The switch knob  7  is constituted by a two-layered structure of an outer layer portion  97  and an inner layer portion  99 . The outer layer portion  97  is molded by, for example, ABS resin and the inner layer portion  97  is molded by, for example, polycarbonate (PC). The outer layer  98  is provided with left and right side walls  101  and  103  and an opening  105  for display. The inner layer portion  99  is integrally provided with the operating lever portion  87 , the elastic pin portion  9  and the middle wall  27 . Further, the inner layer portion  99  is provided with a projection  107 , which is disposed at inside of the opening  105  of the outer layer portion  97  to constitute a light projecting display portion. That is, the inner layer portion  99  is provided with light transmitting performance for transmitting light of a light emitting diode or a lamp provided at an inner portion of the switch to thereby carry out predetermined display. 
   The side walls  101  and  103 , the middle wall  27 , the operating lever portion  87  and the elastic pin portion  9  are arranged substantially at equal intervals in view from the section of FIG.  8 . Further, the axis center of the elastic pin portion  9  passes the center of the support hole  29  of the knob attaching portion  5  fitted to the support pin  23  of the knob attaching portion  5  in view from the state of FIG.  6 . 
   Next, when the side of the switch case  3  is viewed as a single member, the switch case  3  is as shown by FIG.  9  through FIG.  12 . The spring containing portion  15  is provided with a spring containing hole  109  having an inner diameter larger than a diameter of the elastic pin portion  9  to facilitate to deform to bend the elastic pin portion  9  and supporting the elastic pin portion  9  in a loose fit state. The bottom portion  17  of the spring containing portion  15  is formed as a guide portion  111  in a shape of a taper hole converging from the spring containing hole  109  to the engaging hole  13 . A fitting portion  113  is provided at an upper end of the spring containing portion  15 . The fitting portion  113  is provided with a fitting groove  115  communicated in the front and rear direction of the direction of pivoting the switch knob  7 . The fitting groove  115  is for loosely fitting a click portion, mentioned later, of a switch knob having other specification and avoiding interference with the click portion. 
   In integrating operation, in a state in which the side of the switch case  3  and the side of the terminal block  31  are separated, on the side of the switch case  3 , the switch knob  7  is pivotably supported and on the side of the terminal block  31 , the movable pieces  69   a  and  69   b  are pivotably supported by the fulcrum serving fixed contacts  48   a  and  48   b  and the slider  67  and the like are integrated. 
   The steel ball  75  is contained in the slider  67  previously via the coil spring  77  and the slider  67  and the slider cover  57  are arranged above the containing wall portion  39  in a state in which the side of the head portion  83  is projected from the window  71  of the slider cover  57 . When the slider cover  57  is pushed onto the containing wall portion  39  via the guide of the guide face  53 , the engaging hole  61  of the slider cover  57  is engaged with the engaging claw  63  of the terminal block  31 . Under the state, the steel balls  75  of the slider  67  are brought into elastic contact with the movable pieces  69   a  and  69   b  and arranged in the state of the neutral position (OFF position) by the inclined faces  95  and  97  to thereby previously attach the slider  67  and the like to the side of the terminal block  31 . 
   In attaching the switch knob  7 , firstly, the elastic pin portion  9  is arranged to be opposed to the spring containing portion  15 . Successively, the switch knob  7  is pushed to the knob attaching portion  5 . By the pushing the elastic pin portion  9  is inserted into the spring containing hole  109  of the spring containing portion  15  and a front end  9   a  thereof is fitted to the engaging hole  13  at the bottom portion  17  of the spring containing portion  15 . Although the fitting of the front end  9   a  to the engaging hole  13 , is constituted by loose fitting having a small clearance, it is naturally possible to provide the engaging pin portion  9  at the pivoting center C 1  and form the engaging pin portion  9  by a constitution easy to deform elastically to thereby constitute fitting which is not provided with a clearance or press-fitting. 
   In inserting the elastic pin portion  9 , even when a relationship between the front end  9   a  of the elastic pin portion  9  and the engaging hole  13  is more or less shifted, by bringing the front end  9   a  of the elastic pin portion  9  into contact with the guide portion  111  at the lower end of the spring containing hole  109 , the front end  9   a  is automatically guided to the side of the engaging hole  13  and the front end  9   a  of the elastic pin portion  9 , can firmly be fitted to the engaging hole  13 . Therefore, the elastic pin portion  9  can be inserted with the spring containing hole  109  having the large diameter as a measure and the switch knob  7  can be integrated extremely easily. 
   When the elastic pin portion  9  is fitted to and supported by the engaging hole  13 , ride over of inclined faces among the support pin  23 , the middle wall  27  and the side wall portion  103 , is finished and the support holes  29  of the switch knob  7  are fitted to the support pins  23  of the knob attaching portion  5  as shown by FIG.  3 . 
   By attaching the switch knob  7  to the knob attaching portion  5  in this way, as described above, the front end  9   a  of the elastic pin portion  9  is fitted to and held by the engaging hole  13 , the switch knob  7  is held at the neutral position relative to the knob attaching portion  5  and the operating lever  87  is hung right downwardly. Further, the movable piece  69   a  and the slider  67  attached as described above, are disposed at the neutral position (OFF position) by spring force of the coil spring  77 . Therefore, when the switch case  3  and the terminal block  31  are coupled and the engaging projection  35  is engaged with the engaging window  33 , the operating lever portion  87  of the switch knob  7  is automatically fitted into the operating recessed portion  85  of the slider  67 . The fitting is automatically carried out mainly by the switch lever  7  held at the neutral position as described above, relative to the slider  67  similarly held at the neutral position although the fitting is guided also by a curved face at the front end of the operating lever portion  87 , a guide inclined face provided at an entry portion of the operating recessed portion  85  and the like, and the integration can smoothly be carried out even when there is brought about a state in which portions of the operating lever portion  87  and the operating recessed portion  85  are disposed at inside of the switch case  3  and are not seen in integration. 
   Next, a description will be given of switching operation. When the power window is lifted by the switch knob  7 , an operating portion  7   a  of the switch knob  7  is pulled up and the switch knob  7  is rotated in the clockwise direction in FIG.  2 . Thereby, the operating lever portion  87  transmits operational force to the operating recessed portion  85  and the slider  67  is moved in the left direction in FIG.  2 . In the operation, the switch knob  7  is pivoted centering on the pivoting center C 1  by the axial support of the support pin  23 . At this occasion, the elastic pin portion  9  is bent at inside of the spring containing hole  109  and pivoting of the switch knob  7  centering on the support pin  23  can be permitted. Further, in operating the switch knob  7 , the elastic pin portion  9  can provide predetermined elastic force and therefore, in rotating the switch knob  7  centering on the support pin  23 , play of the switch knob  7  can be prevented. 
   By the operation of pulling up the switch knob  7 , the steel ball  75  is shifted from the inclined face  93  to the inclined face  95  in the click groove  92  and the movable piece  69   a  is pivoted in the counterclockwise direction of  FIG. 2  centering on the fulcrum serving fixed contact  48   a . By the pivoting, the movable contact  89  is brought into contact with the fixed contact  45   a , there is constituted a closed circuit of the fixed contact  45   a , the movable contact  89 , the movable piece  69   a  and the fulcrum serving fixed contact  48   a  and the power window can be lifted. 
   When the hand is separated from the switch knob  7 , the switch knob  7  is urged by the elastic recovery force of the elastic pin portion  9  and the spring force of the coil spring  77 , rotated to return centering on the support pin  23  and is held at the neutral position again. At the neutral position, the elastic pin portion  9  can exert elastic reactive force to movement of the switch knob  7  and therefore, the switch knob  7  can firmly be held at the neutral position and the play of the switch knob  7  relative to portions thereof connected to the knob attaching portion  5  and the operating recessed portion  85  can firmly be prevented. 
   On the side of the terminal block  31 , by the urge force of the coil spring  77 , the steel ball  75  is automatically returned from the inclined face  95  to the inclined face  93 . By the returning, there is brought about a state in which the movable contact  89  is separated from the fixed contact  45   a  as shown by  FIG. 2  by operation reverse to the above-described and there is brought about a state in which the movable contact portion  91  is brought into contact with the fixed contact portion  47   a . The state can firmly be maintained by bringing the steel ball  75  into the inclined face  93  having a large inclination. 
   When the power window is lowered, the operating portion  7   a  of the switch knob  7  is pressed to thereby rotate the switch knob  7  in the counterclockwise direction in the state of FIG.  2 . At this occasion, similar to the above-described, by bending the elastic pin portion  9  and cooperatively moving the slider  67  and the movable piece  69   a  by the switch knob  7  against the coil spring  77 , rotation of the switch knob  7  is permitted. 
   The slider  67  is moved in the right direction in FIG.  2  and the steel ball  75  is moved from the inclined face  93  to the inclined face  97  on the side of the movable contact portion  91 . By the movement, there is maintained a state in which the movable contact portion  91  is brought into contact with the fixed contact portion  47   a , that is, the movable piece  69   a  maintains the state of FIG.  2 . Under the state, on the side of the movable piece  69   b , the movable piece  69   b  is moved reverse to the movable piece  69   a , the movable contact  89  of the movable piece  69   b  is brought into contact with the fixed contact  45   b , a closed circuit is formed similar to the above-described and the power window can be lowered. 
   Further, when the hand is separated from the switch knob  7 , similar to the above-described, the switch knob  7  automatically returns to the neutral position by the elastic recovery force of the coil spring  77  and the elastic pin portion  9  and the neutral position is maintained in a state of preventing play. The movable pieces  69   a  and the  69   b  also return to the neutral position similar to the above-described. 
   Further, according to the above-described embodiment, integration can be carried out only by fitting the front end  9   a  of the elastic pin portion  9  to the engaging hole  13  since an elastic portion is constituted by the elastic pin portion  9  and a receive portion is constituted by the engaging hole  13 , a number of parts can be reduced and a number of integrating steps can significantly be reduced. Further, the elastic pin portion  9  is only engaged with the engaging hole  13  and therefore, a failure in step in integration can considerably be restrained. Further, since the number of parts is small, integration and parts control can be facilitated and a considerable reduction in cost can be achieved. 
   According to the embodiment of the invention, the spring containing portion  15  can contain a coil spring used in a switch knob having other specification and therefore, in place of the switch knob  7 , a switch knob  7 A of an auto switch can be mounted as shown by FIG.  13 . 
     FIG. 13A  is a sectional view of essential portions at a periphery of a switch knob and  FIG. 13B  is an enlarged view of a periphery of a click portion. The auto switch is used when a power window switch on, for example, a driver seat side is operated to lift and lower and a constitution other than the switch knob  7 A is similar to that as described above. 
   The switch knob  7 A is provided with a click portion  117  above the spring containing portion  15 . The click portion  117  is provided with a click groove  119 . The click groove  119  is formed in two stages symmetrically in the front and rear direction and is constituted by front and rear inclined faces  121  for manual operation, front and rear inclined faces  123  for automatic operation and partition faces  125  between the inclined faces  121  and  123 . 
   The click portion  117  is fitted to the notched portion  115  at an upper end of the spring containing portion  15 . There is constructed a constitution in which a coil spring  127  is contained in the spring containing hole  109  and a roller  129  urged by the coil spring  127  is brought into contact with the click groove  119 . 
   In switching operation, when the switch knob  7 A is rotated by operating to pull up or press the operating portion  7   a  of the switch knob  7 A, in a range of a first stage of manual operation, the inclined faces  121  of the click portion  117  are slid relative to the roller  129 . When the partition faces  125  is brought into contact with the roller  129  by the sliding, predetermined reactive force is given to rotation of the switch knob  7 A and finish of the manual operation region can be informed to the driver. Therefore, the driver can operate to lift and lower the power window manually by operating to press and pull up the switch knob  7 A by predetermined operational force. 
   When the switch knob  7 A is pulled up or pressed to a second stage by force equal to or larger than the predetermined operational force, the roller  129  rides over the partition faces  125  and the inclined faces  123  are brought into sliding contact with the roller  129 . Therefore, the power window on the driver seat side can automatically be lifted and lowered only by operating to pull up or press the switch knob  7 A once up to the region of the second stage. 
   In operating such a switch knob  7 A, since the click portion  117  is fitted to the notched portion  115 , front and rear portions of the roller  129  are surrounded by the click groove  119 , left and right portions thereof are surrounded by the fitting portion  113  and therefore, detachment of the roller  129  can firmly be prevented and operation of the switch knob  7 A can smoothly be carried out. 
   Further, in this way, in the case of the power window switch on the driver seat side, the auto switch as shown by  FIG. 13  can be attached and in the case of a power window switch on the front passenger seat side or the rear seat side, the switch knob  7  provided with the elastic pin portion  9  in FIG.  1  and the like can be attached and common use formation of the switch case  3  and the like can be achieved. Therefore, as a whole, a number of parts is considerably reduced, parts control is reduced and a considerable reduction in cost can be achieved. 
   Further, in the above-described embodiment, a lower end of the spring containing hole  109  can also be made flat by omitting the guide portion  111 . Further, there can also be constructed a constitution in which the spring containing portion  15  and the like are omitted, only the engaging hole  13  is provided at the knob attaching portion  5  and the elastic pin portion  9  is fitted to the engaging hole  13 . The elastic portion can be formed in a shape of a plate regardless of the elastic pin portion  9 . The receive portion can be constituted by a groove or the like for engaging the front end  9   a  of the elastic pin portion  9  or a front end of an elastic portion in a shape of a plate in the front and rear direction in the direction of pivoting the switch knob  7  regardless of the engaging holes  13 . The elastic pin portion  9  can also be provided by shifting from the pivoting center C 1  by being arranged to the engaging hole  13  to be able to move in the up and down direction. 
   Further, although according to the embodiment, the elastic pin portion  9  constituting an elastic projection is provided at the switch knob  7  as the elastic portion and the engaging hole  13  constituting the receive portion is provided on the side of the switch case  3 , there can be constructed also a constitution in which the engaging hole  13  is provided on the side of the switch knob  7  and the elastic pin portion  9  is provided on the side of the switch case  3 . 
   (Second Embodiment) 
   FIG.  14  through  FIG. 16  show a second embodiment of the invention.  FIG. 14  is a perspective view of a switch knob  7 B according to a second embodiment,  FIG. 15  is a side view of essential portions in a state in which the switch knob  7 B is attached to the switch case  3  and  FIG. 16  is a disassembled perspective view of essential portions. A total constitution thereof is provided with a structure similar to that of the first embodiment. That is, although not illustrated, there is provided a terminal block having a similar structure. Further, an explanation will be given by attaching the same notations to corresponding constituent portions. 
   According to the embodiment, there is constructed a constitution in which elastic leg portions  131   a  and  131   b  are provided as an elastic portion, a receive portion is constituted by an outer face  3   a  of the switch case  3  and the elastic leg portions  131   a  and  131   b  are brought into elastic contact with the outer face  3   a  of the switch case  3 . 
   The elastic leg portions  131   a  and  131   b  are integrally provided with the outer layer  98  of the switch knob  7 B and is molded by ABS resin. A pair of the elastic leg portions  131   a  and  131   b  in the front and rear direction are provided at each of the side wall portions  101  and  103  of the switch knob  7 B. The respective elastic leg portions  131   a  and  131   b  are symmetrically provided in the front and rear direction of the direction of pivoting by constituting a boundary right below the pivoting center C 1  constituted by fitting the support pin  23  to the support hole  29 . There can also be constructed a constitution in which the elastic leg portions  131   a  and  131   b  are provided only at either one of the side wall portions  101  and  103  of the switch knob  7 B. The elastic leg portions  131   a  and  131   b  are formed in a diverging shape in view from sides thereof to open from each other toward the outer face  3   a  of the switch case  3 . Projections  131   aa  and  131   ba  are provided at front ends of the elastic leg portions  131   a  and  131   b.    
   According to the embodiment, a groove  133  is provided at the outer face  3   a  of the case  3 . The groove  133  is provided along the direction of pivoting the switch knob  7 B at both side portions of the side wall portions  101  and  103  of the switch knob  7 B. The groove  133  is fitted with and guides the projected portions  131   aa  and  131   ba  of the elastic leg portions  131   a  and  131   b . That is, there is constructed a constitution in which a width of the groove  133  is formed to be slightly wider than a thickness of the elastic leg portions  131   a  and  131   b  to thereby loosely fit and slidably hold the projections  131   aa  and  131   ba  of the elastic leg portions  131   a  and  131   b.    
   Further, according to the embodiment, in the switch knob  7 B, when the support hole  29  of the switch knob  7 B is fitted to the support pin  23  of the knob attaching portion  5 , the respective elastic leg portions  131   a  and  131   b  are fitted into the grove  133 . Under the state, the elastic leg portions  131   a  and  131   b  are brought into a state in which the projections  131   aa  and  131   ba  are brought into elastic contact with the bottom portion of the groove  133  and are slightly bent. 
   Therefore, the switch knob  7 B can be integrated to the switch case  3  in a state in which the switch knob  7 B is held at the neutral position around the pivoting center C 1  and the operating lever is made vertical. Further, according to the embodiment, the respective elastic leg portions  131   a  and  131   b  exert also elastic reactive force in the upper direction to the switch knob  7 B and therefore, the elastic reactive force can be operated between the boss  23  and the support hole  29  and play of the switch knob  7 B can be prevented further firmly. 
   In operating the switch knob  7 B, when the switch knob  7 B is pulled up, the elastic leg portion  131   b  is mainly bent and when the switch knob  7 B is pressed, the elastic leg portion  131   a  is mainly bent to thereby exert the elastic reactive force. Therefore, when the hand is separated from the switch knob  7 B, the switch knob  7 B can firmly be returned to the neutral state by urging of the elastic reactive force of the coil spring and the elastic leg portion  131   a  or  131   b.    
   In operating the switch knob  7 B, the projections  131   aa  and  131   ba  of the elastic leg portions  131   a  and  131   b  are fitted to and guided by the groove  133  and operation by the elastic leg portions  131   a  and  131   b  can firmly be carried out. 
   In integrating operation, by fitting the projections  131   aa  and  131   ba  of the elastic leg portions  131   a  and  131   b  to the groove  133 , there can be avoided an inconvenience in which the finger of the operator or the like is caught by the elastic leg portions  131   a  and  131   b , destruction of the elastic leg portions  131   a  and  131   b  can be prevented and the function can firmly be achieved. 
   In this way, also according to the embodiment, operation and effect substantially similar to those of the first embodiment can be achieved. Further, according to the embodiment, the elastic reactive force in the upper direction can be provided to the switch knob  7 B by the elastic leg portions  131   a  and  131   b  and the switch knob  7 B can be held at the neutral state and play can be prevented further firmly. 
   Further, by canceling elastic force of the elastic leg portions  131   a  and  131   b  frontward and rearward from the pivoting center C 1 , an increase in force of operating the switch knob  7 B can be restrained. 
   Further, although according to the second embodiment, the elastic leg portions  131   a  and  131   b  are provided on the side of the switch knob  7 B as the elastic portion and the outer face  3   a  is provided on the side of the switch case  3  as the receive portion, there can be constructed also a constitution in which the elastic leg portions  131   a  and  131   b  are provided on the side of the switch case  3  and the outer face  3   a  is provided on the side of the switch knob  7 B. 
   Further, in the above-described embodiment, there can also be constructed a constitution in which the groove  133  is omitted and the elastic leg portions  131   a  and  131   b  are directly brought into contact with the outer face  3   a  of the switch case  3 . 
   Further, although the elastic leg portions  131   a  and  131   b  are formed in the diverging shape, the elastic leg portions can also be formed as shown by FIG.  17  and FIG.  18 . FIG.  17  and  FIG. 18  show an embodiment according to a modified example of the second embodiment.  FIG. 17  is a side view of essential portions in a state in which a switch knob  7 C is attached to a switch case  3 C and  FIG. 18  is a side view of essential portions in a state in which a switch knob  7 D is attached to a switch case  3 D. 
   In  FIG. 17 , contrary to the above-described elastic leg portions  131   a  and  131   b , elastic leg portions  131 C a  and  131 C b  are formed to bend to an outer face  3 C a  constituting a receive portion of the switch case  3 C to be proximate to each other in view from sides thereof. There is constructed a constitution in which front end sides of the elastic leg portions  131 C a  and  131 C b  are brought into elastic contact with the outer face  3 C a  of the switch case  3 C. The respective elastic leg portions  131 C a  and  131 C b  are not provided with projections for contact at front end sides thereof and are not constituted as the elastic leg portions  131   a  and  131   b , however, the projections can be provided similarly. 
   Also in  FIG. 18 , contrary to the above-described elastic leg portions  131   a  and  131   b , elastic leg portions  131 D a  and  131 D b  are formed to bend to be proximate to each other toward an outer face  3 D a  constituting a receive portion of the switch case  3 D in view from sides thereof. There is constructed a constitution in which front end sides of the elastic leg portions  131 D a  and  131 D b  are brought into elastic contact with the outer face  3 D a  of the switch case  3 D. The respective elastic leg portions  131 D a  and  131 D b  are provided with projections  131 D aa  and  131 D ba  at front end sides thereof similar to the elastic leg portions  131   a  and  131   b , however, the projections  131 D aa  and  131 D ba  can also be omitted similar to FIG.  17 . 
   Also by the embodiments of FIG.  17  and  FIG. 18 , an effect substantially similar to that of the embodiment of FIG.  14  through  FIG. 16  can be achieved. 
   Further, although according to the second embodiment, the elastic leg portions  131 C a ,  131 C b ,  131 D a  and  131 D b  are provided on the sides of the switch knobs  7 C and  7 D as elastic portions and the outer faces  3 C a  and  3 D a  are provided on the sides of the switch cases  3 C and  3 D as the receive portions, there can also be constructed a constitution in which the elastic leg portions  131 C a ,  131 C b ,  131 D a  and  131 D b  are provided on the sides of the switch cases  3 C and  3 D and the outer faces  3 C a  and  3 D a  are provided on the sides of the switch knobs  7 C and  7 D. 
   (Third Embodiment) 
   FIG.  19  through  FIG. 23  show a third embodiment of the invention.  FIG. 19  is a side view of a power window switch constituting a switch according to the third embodiment of the invention,  FIG. 20  is a perspective view of a periphery of a switch knob,  FIG. 21  is a rear view of the periphery of the switch knob,  FIG. 22  is a side view of essential portions in a state in which the switch knob is attached to a switch case and  FIG. 23  is a side view of essential portions for explaining operation in the state in which the switch knob is attached to the switch case. 
   Further, according to the embodiment, a constitution of the inside of the switch knob or the like is constructed by a structure similar to that of the first embodiment and there is provided a terminal block having a similar structure, although not illustrated. Therefore, an explanation will be given by attaching the same notations to constituent portions in correspondence with those of first embodiment. Further, an explanation will be given by attaching the same notations to a plurality of switch knobs  7 E indicated by a power window switch  1 E of  FIG. 19  since operation and effect as embodiment of the invention are the same although specific functions differ. 
   According to the embodiment, as shown by FIG.  19  through  FIG. 22 , there are provided through holes  137  in a shape of a rectangular long hole at respective edge portions  135  of the both side wall portions  101  and  103  of the switching knob  7 E. By the through holes  137 , there are provided elastic portions  139  in a both end supporting state respectively at the edge portions  135  of the both side portions  101  and  103  by being disposed at the edge portions  135  of the switch knob  7 E on the lower side of the pivoting center C 1 . However, there can also be constructed a constitution in which the elastic portion  139  is provided only at either one of the two side wall portions  101  and  103 . The elastic portion  139  is slightly projected from the edge portion  135  of the switch knob  7 E to an outer face  3 E a  of the switch case  3 E. However, the elastic portion  139  can also be formed not to project from the edge portion  135  but along the edge portion  135 . Further, as shown by  FIG. 22 , the elastic portion  139  is formed symmetrically with respect to an orthogonal line S right below the pivoting center C 1 , in other words, the pivoting center C 1  to constitute lengths L in the front and rear direction in the direction of pivoting. 
   Further, the outer face  3 E a  constituting the receive portion of the switch case  3 E, is provided with a projection  141  in a shape of a rectangular pillar integrally with the outer face  3 E a  and the knob attaching portion  5 . The projection  141  can also be formed separately from the outer face  3 E a  and the knob attaching portion  5  and fixedly attached thereto by adhering or the like. Further, the projection  141  can be provided not on the side of the outer face  3 E a  but the side of the elastic portion  139 . The projection  141  is formed symmetrically with respect to the orthogonal line S in the front and rear direction of the direction of pivoting. An upper end  141   a  of the projection  141  is formed to be flat. The upper end  141   a  of the projection  141  is always brought into contact with the elastic portion  139 . By the contact, the elastic portion  139  can be bent slightly upwardly in the neutral state of the switch knob  7 E. Thereby, the elastic reactive force in the upward direction can be provided to the switch knob  7 E by the elastic portion  139  and the switch knob  7 E can be held in the neutral state and play can be prevented further firmly. 
   By such a constitution, the elastic portion  139  can be deformed by changing a situation of bringing the side of the elastic portion  139  into contact with the projection  141  by operating to pivot the switch knob  7 E. Specifically, the switch knob  7 E can be pivoted by the same angle relative to the orthogonal line S by operating to pull up and press the switch knob  7 E.  FIG. 23  shows a state in which the switch knob  7 E is operated to pull up, under the state, the elastic portion  139  is disposed to provide an angle relative to the upper end  141   a  of the projection  141 , the elastic portion  139  is butted to a corner portion on the rear side of the upper end  141   a  of the projection  141  and the elastic portion  139  is deformed to bend to the side of the through hole  137  to thereby exert the elastic reactive force. Also when the switch knob  7 E is operated to press and pivoted in a direction reverse to that of  FIG. 23 , the elastic portion  139  is deformed to exert the elastic reactive force by similar operation. Therefore, when the hand is separated from the switch knob  7 E, by urging of the elastic portion  139 , the switch knob  7 E can firmly be returned to the neutral state. 
   In this way, also according to the embodiment, operation and effect substantially similar to those of the first embodiment can be achieved. 
   The elastic portion  139  is brought into the both end supporting state and rigidity of the elastic portion  139  per se can be increased. Therefore, a wall thickness or the like of the elastic portion  139  can be reduced and light-weighted formation and small-sized formation can further be expedited. Further, since the rigidity of the elastic portion  139  is increased, even when in molding the switch knob  7 E by a mold, a jig pin brought into the mold for forming the through hole  137 , is drawn in a lateral direction, the elastic portion  139  having the high rigidity can be prevented from being deformed by following the jig pin to be drawn. Therefore, the jig pin can easily be drawn from the mold and fabrication can be facilitated. 
   Further, although according to the third embodiment, the elastic portion  139  is provided on the side of the switch knob  7 E and the outer face  3 E a  is provided on the side of the switch case  3 E as the receive portion, there can be constructed a constitution in which the elastic portion  139  is provided on the side of the switch case  3 E and the outer face  3 E a  is provided on the side of the switch knob  7 E. 
   (Fourth Embodiment) 
     FIG. 24  shows a fourth embodiment of the invention and is a side view of essential portions in a state in which a switch knob is attached to a switch case. Further, a total constitution thereof is similar to that of the third embodiment and an explanation will be given by attaching the same notations to corresponding constituent portions. 
   As shown by  FIG. 24 , according to the embodiment, an elastic leg portion  143  of the switch knob  7 F in the power window switch  1 E, is integrally coupled to the edge portion  135  of the side wall portion  101  of the switch knob  7 F at a position shifted from the orthogonal line S passing the pivoting center C 1  to a rear side and is formed to bend to a front side. There is constructed a constitution in which a front end side of the elastic leg portion  143  is brought into elastic contact with the outer face  3 E a  constituting the receive portion of the switch case  3 E. Although the respective elastic leg portion  143  is provided with a projection  145  for contact at the front end side, the projection can also be omitted. Contact of the elastic leg portion  143  to the outer face  3 E a  is carried out right below the pivoting center C 1 , in other words, on the orthogonal line S passing the pivoting center C 1 . Specifically, contact of the projection  145  to the outer face  3 E a  is carried out on the orthogonal line S. 
   On the side of the side wall portion  103  of the switching knob  7 F, the elastic leg portion is integrally coupled thereto at a position shifted from the orthogonal line S to a front side, formed to bend to the rear side and is formed to arrange symmetrically with the elastic leg portion  143 . 
   However, there can also be constructed a constitution in which the elastic leg portion is provided only on one side of the side wall portions  101  ( 103 ). 
   In this way, also according to the embodiment, operation and effect substantially similar to those of the above-described embodiments can be achieved. Further, according to the embodiment, the elastic reactive force in the upward direction can be provided to the switch knob  7 F by the elastic leg portion  143 , the switch knob  7 F can be held at the neutral state and play can be prevented further firmly. 
   Although according to the embodiment of the invention, an explanation has been given of the power window switch of the pivoting type operating to pull up and push down the switch knob, the switch can also be used as a lever type switch by forming the operating portion  7   a  to be long as in a bar. That is, the invention may be a switch in which the operating knob is pivoted centering on the pivoting center C 1 , a shape of the operating portion of the operating knob and an operating method thereof are not limited. 
   Further, although according to the fourth embodiment, the elastic leg portion  143  is provided on the side of the switch knob  7 F and the outer face  3 E a  is provided on the side of the switch case  3 E as the receive portion, there may be constructed a constitution in which the elastic leg portion  143  is provided on the side of the switch case  3 E and the outer face  3 E a  is provided on the side of the switch knob  7 F.