Abstract:
The purpose of the present invention is to effectively carry out waterproofing, while avoiding cramping an internal space to the extent it is possible to do so. The component is provided with: a light source ( 16   a ); a moveable part ( 11 ) having a first window ( 11   a ); a circuit board ( 16 ); and a housing ( 12, 13, 14, 15 ) in which is formed an opening ( 12   b ) through which the surface of the moving part ( 11 ) protrudes. The housing ( 12, 13, 14, 15 ), in combination with the moveable part ( 11 ), has dividing walls ( 12   d,    13   a ) for dividing the internal space of the housing ( 12, 13, 14, 15 ) into a first space and a second space. The dividing walls ( 12   d,    13   a ) support the moveable part ( 11 ), and the light source ( 16   a ) illuminates the first window ( 11   a ) through a portion ( 12   d ) of the dividing walls ( 12   d,    13   a ), which are formed by transmissive members.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to an electronic component equipped with a movable part (hereinafter, referred to as “movable-part-equipped electronic component”), the movable part being disposed so as to protrude from an opening portion of a housing, including a lighting window formed therein and being movable by operation of an operator. 
       BACKGROUND ART 
       [0002]    Electronic components each provided with a rotary movable part have been popular. Examples of such an electronic component include an electronic component provided with a dial for adjusting the temperature of a seat heater of an automobile and an electronic component provided with a dial for adjusting the exposure of a digital camera. 
         [0003]    In the electronic components described above, for the purpose of enabling a rotary operation of the movable part using a finger, an opening portion is formed in the housing that houses therein the movable part, and the movable part is disposed so as to protrude from the opening portion. 
         [0004]    In this case, a gap is formed between the housing and movable part. For this reason, when liquid spills over the electronic component, the liquid enters inside the electronic component from the gap and may break the electronic component. 
         [0005]    In this respect, Patent Literature (hereinafter, referred to as “PTL”) 1 discloses a drip-proof structure for an electronic component for preventing the entry of liquid by providing a ring-shaped protrusion on the side of the movable part and a ring-shaped recess on the side of the housing. 
         [0006]    Moreover, in addition to the electronic component disclosed in PTL 1, an electronic component in which the movable part partially lights up has been disclosed. For example, PTLs 2 and 3 disclose a drop-proof structure for a rotary electronic component in which an outline character formed in the surface of the rotary movable part lights up. 
         [0007]    The drip-proof structure disclosed in PTL 2 prevents liquid from entering inside by disposing a rubber-like drip-proof plate at the gap between the opening portion of the housing and the movable part to seal the gap. 
         [0008]    In addition, in the drip-proof structure disclosed in PTL 3, an electrically-operable component is formed as a separate unit from a mechanically-operable component to which the movable part is attached, thereby preventing liquid from entering an electrically functional part of the electrically-operable component. 
         [0009]    Furthermore, these rotary electronic components are internally provided with a light guide part composed of a translucent synthetic resin and having a tip portion extending to a lower portion of the movable part. The light emitted from a light-emitting element is guided to the tip portion by the light guide part. The outline character formed in the surface of the movable part is illuminated by the light emitted from the tip portion. 
       CITATION LIST 
     Patent Literature 
       [0010]    PTL 1 
         [0011]    Japanese Patent Application Laid-Open No. 2008-123904 
         [0012]    PTL 2 
         [0013]    Japanese Patent Application Laid-Open No. 2011-134573 
         [0014]    PTL 3 
         [0015]    Japanese Patent Application Laid-Open No. 2010-009937 
       SUMMARY OF INVENTION 
     Technical Problem 
       [0016]    With the related art disclosed in PTL 2, however, the rubber-like drip-proof plate used for preventing the entry of liquid and the light guide plate used for illuminating the outline character are provided separately, so that the internal space of the rotary electronic component becomes so small that it becomes difficult to dispose another component. 
         [0017]    Likewise, in the related art disclosed in PTL 3, the waterproof case used for supporting the movable part and the light guide plate used for illuminating the outline character are provided separately, so that the internal space of the rotary electronic component becomes so small that it becomes difficult to dispose another component. 
         [0018]    For this reason, how waterproofing is effectively performed while a reduction in the internal space is avoided as much as possible in the movable-part-equipped electronic component having a lighting movable part has become an important challenge. 
         [0019]    The present invention has been made in view of the aforementioned problem and aims to implement a movable-part-equipped electronic component capable of effectively performing waterproofing while avoiding a reduction in the internal space as much as possible. 
       Solution to Problem 
       [0020]    A movable-part-equipped electronic component according to the present invention includes: a light source; a movable part including a window formed therein, the window allowing light from the light source to pass therethrough; a circuit board which outputs a signal in accordance with motion of the movable part; and a housing including an opening portion formed therein, the housing being configured to house the light source, the movable part, and the circuit board, the opening portion being an opening through which a surface of the movable part protrudes, in which the housing includes a separation wall when combined with the movable part, the separation wall separating an internal space of the housing into a first space and a second space and movably supporting the movable part, the movable part is combined with the separation wall in a direction from the first space, while the light source and the circuit board are disposed in the second space, and the separation wall is partially formed of a transparent member that allows light from the light source to pass therethrough, and the light source illuminates the window via the transparent member. 
       Advantageous Effects of Invention 
       [0021]    According to the present invention, a movable-part-equipped electronic component capable of effectively performing waterproofing while avoiding a reduction in the internal space as much as possible can be implemented. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0022]      FIG. 1  is a perspective view illustrating an exemplary configuration of a movable-part-equipped electronic component according to Embodiment 1 of the present invention; 
           [0023]      FIG. 2  is a diagram illustrating an exploded view illustrating the exemplary configuration of the movable-part-equipped electronic component according to Embodiment 1 of the present invention; 
           [0024]      FIG. 3  is a cross-sectional view illustrating a first exemplary configuration of the movable-part-equipped electronic component illustrated in  FIGS. 1 and 2 ; 
           [0025]      FIG. 4  is a cross-sectional view illustrating a second exemplary configuration of the movable-part-equipped electronic component; 
           [0026]      FIG. 5  is a cross-sectional view illustrating a third exemplary configuration of the movable-part-equipped electronic component; 
           [0027]      FIG. 6  is a diagram illustrating the brightness of a first window in the movable-part-equipped electronic component illustrated in  FIG. 5 ; 
           [0028]      FIG. 7  is a diagram illustrating the brightness of a first window in the movable-part-equipped electronic component illustrated in  FIG. 4 ; 
           [0029]      FIG. 8  is a diagram illustrating the brightness of a first window in the movable-part-equipped electronic component illustrated in  FIG. 3 ; and 
           [0030]      FIG. 9  is a cross-sectional view illustrating an exemplary configuration of a movable-part-equipped electronic component according to Embodiment 2 of the present invention. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0031]    Hereinafter, a description will be given of embodiments of the present invention with reference to the drawings. 
       Embodiment 1 
       [0032]      FIG. 1  is a perspective view illustrating an exemplary configuration of movable-part-equipped electronic component  10  according to Embodiment 1 of the present invention.  FIG. 2  is an exploded view illustrating the exemplary configuration of movable-part-equipped electronic component  10  according to Embodiment 1 of the present invention. 
         [0033]    Hereinafter, a description will be given of a case where movable-part-equipped electronic component  10  is an electronic component provided with a dial for adjusting the temperature of a seat heater of an automobile. However, movable-part-equipped electronic component  10  is not limited to this case, and may be another electronic component having a movable part. 
         [0034]    As illustrated in  FIGS. 1 and 2 , movable-part-equipped electronic component  10  includes movable part  11 , bezel  12 , first housing member  13 , second housing member  14 , third housing member  15 , circuit board  16 , slider  17 , click spring  18 , and waterproof rubber  19 . 
         [0035]    Movable part  11  is a dial in which first window  11   a  for allowing the light from light source  16   a  (to be described hereinafter) to pass therethrough is formed. In addition, rotary shaft  11   b  having a cylindrical shape is formed in movable part  11 . Rotary shaft  11   b  is rotatably fitted to opening portion  13   b  of first housing member  13 . 
         [0036]    Slider  17  is attached to rotary shaft  11   b.  Slider  17  is a member forming a part of a variable resistor. A resistive element (not illustrated) is formed on circuit board  16  to be described hereinafter, and the variable resistor is composed of slider  17  and the resistive element. 
         [0037]    More specifically, slider  17  slides on the resistive element in accordance with the rotation of movable part  11  to change the output voltage of the variable resistor. The temperature of the seat heater is thus controlled in accordance with this output voltage. 
         [0038]    Movable part  11  is formed of a transparent acrylonitrile butadiene styrene (ABS) resin, for example. The portion of the outer-side surface of movable part  11 , which protrudes from opening portion  12   c  of bezel  12  except for first window  11   a,  is painted in black in order for the light from light source  16   a  to pass through only first window  11   a.    
         [0039]    Bezel  12  is a housing member forming a part of the housing for housing light sources  16   a  to  16   c,  movable part  11 , and circuit board  16 , for example. In bezel  12 , the following parts are formed: second window  12   a  for allowing the light from light source  16   b  to pass therethrough; third window  12   b  for allowing the light from light source  16   c  (to be described hereinafter) to pass therethrough; and opening portion  12   c.    
         [0040]    Bezel  12  is formed of a transparent ABS resin, for example. In order for the light beams from light source  16   b  and light source  16   c  to pass through only second window  12   a  and third window  12   b,  respectively, the outer-side surface portion of bezel  12  except for second window  12   a  and third window  12   b  is painted in black. In addition, movable part  11  is disposed at opening portion  12   c  so as to protrude from opening portion  12   c.  In this manner, movable part  11  becomes rotatable using a finger. 
         [0041]    In movable-part-equipped electronic component  10 , first, second, and third windows  11   a,    12   a,  and  12   b  are so assigned light sources  16   a,    16   b,  and  16   c,  respectively, that first, second, and third windows  11   a,    12   a,  and  12   b  can light up brightly. 
         [0042]    First housing member  13  is a housing member forming a part of the housing. First housing member  13  includes wall surface  13   a,  opening portion  13   b,  bearing wall  13   c , and terminals  13   d.    
         [0043]    Wall surface  13   a  separates the internal space of the housing of movable-part-equipped electronic component  10  into a first space and a second space when combined with movable part  11 , and support wall  12   d  (to be described hereinafter) provided to bezel  12 . 
         [0044]    More specifically, wall surface  13   a  and support wall  12   d  form a separation wall that separates the internal space of the housing into the first space and the second space when combined with movable part  11 . 
         [0045]    The housing is formed by combining bezel  12 , first housing member  13 , second housing member  14 , and third housing member  15 . The first space indicates the space side where the body portion of movable-part  11  exists, and the second space indicates the space side where light sources  16   a  to  16   c  and circuit board  16  are disposed. 
         [0046]    In opening portion  13   b,  rotary shaft  11   b  of movable-part  11  is rotatably inserted into opening portion  13   b  as described above. Bearing wall  13   c  is a cylindrical wall surface and is formed so as to protrude from the body portion of wall surface  13   a  into the first space. Bearing wall  13   c  comes into surface contact with rotary shaft  11   b  and rotatably supports rotary shaft  11   b  from outside. 
         [0047]    Terminal  13   d  is bonded to electrode  16   d  provided at circuit board  16 . The signal in accordance with the rotation angle of movable-part  11  is outputted from terminal  13   d.    
         [0048]    Second housing member  14  and third housing member  15  are each a housing member forming a part of the housing. In third housing member  15 , opening portion  15   a  is formed. The rotary shaft of movable part  11  (not illustrated) (i.e., rotary shaft provided on a side opposite to the side where rotary shaft  11   b  is provided) is rotatably inserted into opening portion  15   a.    
         [0049]    Circuit board  16  supplies light sources  16   a  to  16   c  provided on circuit board  16  with power and outputs the signal in accordance with the motion of movable part  11  from electrode  16   d.  More specifically, circuit board  16  outputs the voltage signal of the variable resistor in accordance with the motion of movable part  11  to outside from electrode  16   d  via terminal  13   d.  Light sources  16   a  to  16   c  are each a light emitting diode (LED) light source. 
         [0050]    Slider  17  is a member forming a part of the variable resistor and slides on the resistive element in accordance with the rotation of movable part  11  and changes the output voltage of the variable resistor as described above. 
         [0051]    Click spring  18  is attached to movable part  11  and rotates together with movable part  11 . Click spring  18  has at least one protrusion (two protrusions in the example of  FIG. 2 ). Meanwhile, a protrusion is formed in an inner side of opening portion  15   a  of third housing member  15 . 
         [0052]    In this manner, the operator of movable part  11  can have a click feeling of movable part  11  when the protrusion of click spring  18  passes over the protrusion formed at opening portion  15   a.  For example, when the protrusion of opening portion  15   a  is formed to cause a click feeling at the rotation angle corresponding to switch off, the operator can easily confirm whether the switch off operation is successfully performed. 
         [0053]    Waterproof rubber  19  is a sealing member disposed between bezel  12  and first housing member  13 . When bezel  12  is combined with first housing member  13 , waterproof rubber  19  is pressed against first housing member  13 . Thus, the entry of liquid between bezel  12  and first housing member  13  can be suppressed. 
         [0054]    The separation wall mentioned above is partially formed of a transparent member that allows the light from light source  16   a  to pass therethrough. Light source  16   a  illuminates first window  11   a  in the first space via the transparent member. This point will be described hereinafter in detail. 
         [0055]      FIG. 3  is a cross-sectional view illustrating a first exemplary configuration of movable-part-equipped electronic component  10  illustrated in  FIGS. 1 and 2 . The cross-section illustrated in  FIG. 3  is a cross-section obtained by cutting movable-part-equipped electronic component  10  in  FIG. 1  along the x-y plane passing through the center of first window  11   a.    
         [0056]    As illustrated in  FIG. 3 , there is no obstacle that interrupts the progression of light between light source  16   b  and second window  12   a,  so that the light emitted from light source  16   b  illuminates second window  12   a.  Accordingly, second window  12   a  lights up. 
         [0057]    Likewise, although not illustrated in  FIG. 3 , third window  12   b  illustrated in  FIG. 2  is illuminated by the light emitted from light source  16   c.  Accordingly, third window  12   b  lights up. 
         [0058]    Meanwhile, supporting wall  12   d  that supports bezel  12  and wall surface  11   c  having an arc-like outer periphery exist between light source  16   a  and first window  11   a . Supporting wall  12   d  is a part of bezel  12  and wall surface  11   c  is a part of movable part  11 . 
         [0059]    As described above, bezel  12  is formed of a transparent ABS resin, so that supporting wall  12   d  allows the light emitted from light source  16   a  to pass therethrough. In addition, movable part  11  is also formed of a transparent ABS resin, so that wall surface  11   c  allows the light emitted from light source  16   a  to pass therethrough. For this reason, the light emitted from light source  16   a  can illuminate first window  11   a.    
         [0060]    The second space where circuit board  16  exists is separated by supporting wall  12   d,  movable part  11 , and wall surface  13   a  from the first space where the body portion of movable part  11  exists. Thus, even when the liquid enters the first space, it is possible to prevent the liquid from entering the second space. 
         [0061]    As described above, movable-part-equipped electronic component  10  according to Embodiment 1 includes the separation wall that separates the internal space of the housing into the first space and the second space. This separation wall is formed when wall surface  13   a  and supporting wall  12   d  are combined with movable part  11 . Supporting wall  12   d  is formed of a transparent member that allows the light emitted from light source  16   a  to pass therethrough, so that first window  11   a  is illuminated by the light that has passed through supporting wall  12   d.    
         [0062]    More specifically, supporting wall  12   d  is to prevent liquid from entering the second space where circuit board  16  exits from the first space where movable part  11  exits, and also to light up first window  11   a  provided at movable part  11 . 
         [0063]    For this reason, a transparent member for guiding the light to first window  11   a  does not have to be provided independently from the separation wall. Accordingly, waterproofing can be effectively performed while a reduction in the internal space of movable-part-equipped electronic component  10  is avoided as much as possible. 
         [0064]    Bearing wall  13   c  having a cylindrical shape and rotatably supporting rotary shaft  11   b  of movable part  11  from outside is formed at wall surface  13   a  so as to protrude from the body portion of wall surface  13   a  into the first space where movable part  11  exists. 
         [0065]    As described above, the protrusion of bearing wall  13   c  into the first space makes the moving distance needed for fluid to enter the second space longer, so that it is made possible to surely prevent the liquid from entering the second space where circuit board  16  exists from the gap between bearing wall  13   c  and rotary shaft  11   b.    
         [0066]    In addition, supporting wall  12   d  of bezel  12  may be disposed on a side surface of bearing wall  13   c  protruding from wall surface  13   a.  For this reason, the position where supporting wall  12   d  is disposed can be flexibly determined. 
         [0067]    For example, when the position where supporting wall  12   d  is disposed is moved to the side of the first space, the second space can be larger, and it is thus made possible to further increase the degree of freedom in design such as where to dispose light source  16   a.    
         [0068]    In the example of  FIG. 3 , first window  11   a  is provided at the outer side of wall surface  11   c  in movable part  11 , and lens  11   d  is formed at the inner side of wall surface  11   c . Lens  11   d  collects the light that has passed through supporting wall  12   d  to first window  11   a . Thus, it is possible to light up first window  11   a  more brightly. 
         [0069]    Note that, it is possible to form an inclined plane instead of forming lens  11   d  at the inner side of wall surface  11   c.    FIG. 4  is a cross-sectional view illustrating a second exemplary configuration of movable-part-equipped electronic component  10 . The cross-section illustrated in  FIG. 4  is a cross-section obtained by cutting movable-part-equipped electronic component  10  illustrated in  FIG. 1  along the x-y plane passing through the center of first window  11   a.    
         [0070]    In the configuration of  FIG. 4  as well, the protrusion of bearing wall  13   c  into the first space makes it possible to surely prevent the liquid from entering the second space where circuit board  16  exists from the gap between bearing wall  13   c  and rotary shaft  11   b.    
         [0071]    In addition, supporting wall  12   d  of bezel  12  may be disposed on a side surface of bearing wall  13   c  protruding from wall surface  13   a.  Thus, the position where supporting wall  12   d  is disposed can be flexibly determined. 
         [0072]    Moreover, in the example of  FIG. 4 , first window  11   a  is provided at the outer side of wall surface  11   c  in movable part  11 , and inclined plane  11   e  is formed at the inner side of wall surface  11   c.  As will be described hereinafter, inclined plane  11   e  is also capable of collecting the light that has passed through supporting wall  12   d  to first window  11   a.  Thus, it is possible to light up first window  11   a  brightly. 
         [0073]    Moreover, the inner side of wall surface  11   c  may be vertical plane  11   f.    FIG. 5  is a cross-sectional view illustrating a third exemplary configuration of movable-part-equipped electronic component  10 . The cross-section illustrated in  FIG. 5  is a cross-section obtained by cutting movable-part-equipped electronic component  10  illustrated in  FIG. 1  along the x-y plane passing through the center of first window  11   a.    
         [0074]    In the configuration of  FIG. 5 , the protrusion of bearing wall  13   c  into the first space makes it possible to surely prevent the liquid from entering the second space where circuit board  16  exists from the gap between bearing wall  13   c  and rotary shaft  11   b.    
         [0075]    In addition, supporting wall  12   d  of bezel  12  may be disposed on a side surface of bearing wall  13   c  protruding from wall surface  13   a.  For this reason, the position where supporting wall  12   d  is disposed can be flexibly determined. 
         [0076]    Next, a description will be given of the brightness of first window  11   a  in each of the configurations of movable-part-equipped electronic component  10  illustrated in  FIGS. 3 to 5 .  FIG. 6  is a diagram illustrating the brightness of first window  11   a  in movable-part-equipped electronic component  10  illustrated in  FIG. 5 .  FIG. 7  is a diagram illustrating the brightness of first window  1  la in movable-part-equipped electronic component  10  illustrated in  FIG. 4 .  FIG. 8  is a diagram illustrating the brightness of first window  11   a  in movable-part-equipped electronic component  10  illustrated in  FIG. 3 . 
         [0077]      FIGS. 6 to 8  indicate the brightness value of a case where first window  11   a  is positioned at the center of opening portion  12   c  of bezel  12  (value near 0 mm in the horizontal axis), the brightness value of a case where movable part  11  rotates by a predetermined angle from the center of opening portion  12   c  (value near 7 mm in the horizontal axis), and the brightness value of a case where movable part  11  rotates in a reverse direction by a predetermined angle from the center of opening portion  12   c  (value near −7 mm in the horizontal axis). 
         [0078]    As illustrated in  FIGS. 6 and 7 , the brightness in first window  11   a  of movable-part-equipped electronic component  10  illustrated in  FIG. 4  is approximately three times the brightness in first window  11   a  of movable-part-equipped electronic component  10  illustrated in  FIG. 5 . 
         [0079]    In addition, as illustrated in  FIGS. 6 and 8 , the brightness in first window  11   a  of movable-part-equipped electronic component  10  illustrated in  FIG. 3  is approximately six times the brightness in first window  11   a  of movable-part-equipped electronic component  10  illustrated in  FIG. 5 . 
         [0080]    As described above, it can be seen that the brightness when first window  11   a  lights up is the largest in movable-part-equipped electronic component  10  in which lens  11   d  is formed at the inner side of wall surface  11   c,  illustrated in  FIG. 3 , and movable-part-equipped electronic component  10  in which inclined plane  11   e  is formed at the inner side of wall surface  11   c,  illustrated in  FIG. 4  has the second largest brightness. 
         [0081]    Accordingly, movable-part-equipped electronic component  10  can be manufactured by selecting an appropriate configuration from among the configurations illustrated in  FIGS. 3 to 5  in accordance with the brightness required when first window  11  a lights up. 
       Embodiment 2 
       [0082]    In Embodiment 1, light source  16   a  illuminates first window  11   a  and light source  16   b  illuminates second window  12   a,  but light source  16   a  may be configured to illuminate both first window  11   a  and second window  12   a  to reduce the number of light sources. 
         [0083]    Thus, a movable-part-equipped electronic component that lights up first window  11   a  formed in movable part  11  and second window  12   a  formed in bezel  12  can be implemented while the number of parts is reduced. Hereinafter, a description will be given of movable-part-equipped electronic component  10  according to Embodiment 2 in detail. 
         [0084]    As in movable-part-equipped electronic component  10  described in Embodiment 1, movable-part-equipped electronic component  10  according to Embodiment 2 includes movable part  11 , bezel  12 , first housing member  13 , second housing member  14 , third housing member  15 , circuit board  16 , slider  17 , click spring  18 , and waterproof rubber  19 , as illustrated in  FIG. 1 . 
         [0085]      FIG. 9  is a cross-sectional view illustrating an exemplary configuration of movable-part-equipped electronic component  10  according Embodiment 2 of the present invention. The cross-section illustrated in  FIG. 9  is a cross-section obtained by cutting movable-part-equipped electronic component  10  illustrated in  FIG. 1  along the x-y plane passing through the center of first window  11   a.    
         [0086]    Note that, in  FIG. 9 , the members identical to the members described in  FIG. 3  are assigned the same reference numerals, and the detailed description thereof will be omitted, hereinafter. 
         [0087]    Movable-part-equipped electronic components  10  illustrated in  FIGS. 9 and 3  are different from each other in that movable-part-equipped electronic component  10  illustrated in  FIG. 9  includes no light source  16   b,  but light source  16   a  illuminates both first window  11   a  and second window  12   a.    
         [0088]    Movable part  11  is formed of a transparent member (e.g., transparent ABS resin) that allows the light from light source  16   a  to pass therethrough. The portion of the outer-side surface portion of movable part  11  protruding from opening portion  12   c  of bezel  12  except for first window  11   a  is painted in black in order for the light from light source  16   a  to pass through only first window  11   a.    
         [0089]    In addition, bezel  12  is also formed of a transparent member (e.g., transparent ABS resin) that allows the light from light sources  16   a  and  16   c  to pass therethrough. The outer-side surface portion of bezel  12  other than second window  12   a  and third window  12   b  is painted in black in order to allow the light beams from light sources  16   a  and  16   c  to pass through second and third windows  12   a  and  12   b,  respectively. 
         [0090]    In movable-part-equipped electronic component  10 , there is no obstacle that interrupts the progression of light between light source  16   a  and second window  12   a,  so that the light emitted from light source  16   a  illuminates second window  12   a.  Accordingly, second window  12   a  lights up. 
         [0091]    Meanwhile, supporting wall  12   d  that supports bezel  12  and wall surface  11   c  having an arc-like outer periphery exist between light source  16   a  and first window  11   a . Supporting wall  12   d  is a part of bezel  12  and wall surface  11   c  is a part of movable part  11 . 
         [0092]    Bezel  12  is formed of a transparent member such as an ABS resin that allows the light from light source  16   a  to pass therethrough, so that supporting wall  12   d  allows the light emitted from light source  16   a  to pass therethrough. In addition, movable part  11  is also formed of a transparent member such as an ABS resin that allows the light from light source  16   a  to pass therethrough, so that wall surface  11   c  allows the light emitted from light source  16   a  to pass therethrough. 
         [0093]    For this reason, the light emitted from light source  16   a  can illuminate first window  11   a.  Thus, it is possible to light up both second window  12   a  and first window  11   a  while the number of light sources is reduced. 
         [0094]    In addition, the second space where circuit board  16  exists is separated from the first space where the body portion of movable part  11  exists by supporting wall  12   d , movable part  11 , and wall surface  13   a.  Thus, even when the liquid enters the first space, it is possible to prevent the liquid from entering the second space. 
         [0095]    As described above, in movable-part-equipped electronic component  10  according to Embodiment 2, the liquid can be prevented from entering from the gap between bezel  12  and movable part  11 , and first window  11   a  provided in movable part  11  and second window  12   a  provided in bezel  12  can light up, respectively, while the number of light sources  16   a  is reduced. 
         [0096]    Moreover, as in Embodiment 1, supporting wall  12   d  in movable-part-equipped electronic component  10  according to Embodiment 2 is to prevent the liquid from entering the second space where circuit board  16  exists from the first space where movable part  11  exists and also to light up first window  11   a  provided in movable part  11 . 
         [0097]    For this reason, the transparent member for guiding the light to first window  11   a  does not have to be provided independently from the separation wall. Thus, waterproofing can be effectively performed while a reduction in the internal space of movable-part-equipped electronic component  10  is avoided. 
         [0098]    In wall surface  13   a,  bearing wall  13   c  having a cylindrical shape and rotatably supporting rotary shaft  11   b  of movable part  11  from outside is formed so as to protrude from the body portion of wall surface  13   a  into the first space where movable part  11  exists. 
         [0099]    As described above, the protrusion of bearing wall  13   c  into the first space makes the moving distance needed for the fluid to enter the second space longer, the liquid can be surely prevented from entering the second space where circuit board  16  exists from the gap between bearing wall  13   c  and rotary shaft  11   b.    
         [0100]    In addition, supporting wall  12   d  of bezel  12  may be disposed on a side surface of bearing wall  13   c  protruding from wall surface  13   a.  For this reason, the position where supporting wall  12   d  is disposed can be flexibly determined 
         [0101]    For example, when the position where supporting wall  12   d  is disposed is moved to the side of the first space, the second space can be larger, and it is thus made possible to further increase the degree of freedom in design such as where to dispose light source  16   a.    
         [0102]    In the example of  FIG. 9 , first window  11   a  is provided at the outer side of wall surface  11   c  in movable part  11 , and lens  11   d  is formed at the inner side of wall surface  11   c . Lens  11   d  collects the light that has passed through supporting wall  12   d  to first window  11   a . Thus, it is possible to light up first window  11   a  more brightly. 
         [0103]    Note that, it is possible to form inclined plane  11   e  at the inner side of wall surface  11   c  as illustrated in  FIG. 4  instead of forming lens  11   d  at the inner side of wall surface  11   c  or it is also possible to form vertical plane  11   f  as illustrated in  FIG. 5 . 
         [0104]    Although a description has been given of the case where movable part  11  is a rotary dial in Embodiments 1 and 2, movable part  11  is not limited to this case. For example, movable part  11  may be a seesaw switch or push button switch or the like. 
         [0105]    Even when movable part  11  is one of these switches mentioned above, the transparent member for guiding the light to first window  11   a  does not have to be provided independently from the separation wall, so that waterproofing can be effectively performed while a reduction in the internal space of movable-part-equipped electronic component  10  is avoided as much as possible. 
       INDUSTRIAL APPLICABILITY 
       [0106]    The movable-part-equipped electronic component according to the present invention is suitable for use as a movable-part-equipped electronic component required to effectively perform waterproofing while avoiding a reduction in the internal space as much as possible. 
       REFERENCE SIGNS LIST 
       [0000]    
       
           10  Movable-part-equipped electronic component 
           11  Movable part 
           11   a  First window 
           11   b  Rotary shaft 
           11   c  Wall surface 
           11   d  Lens 
           11   e  Inclined plane 
           11   f  Vertical plane 
           12  Bezel 
           12   a  Second window 
           12   b  Third window 
           12   c  Opening portion 
           12   d  Supporting wall 
           13  First housing member 
           13   a  Wall surface 
           13   b  Opening portion 
           13   c  Bearing wall 
           13   d  Terminal 
           14  Second housing member 
           15  Third housing member 
           15   a  Opening portion 
           16  Circuit board 
           16   a  to  16   c  Light source 
           16   d  Electrode 
           17  Slider 
           18  Click spring 
           19  Waterproof rubber