Patent Publication Number: US-9851092-B2

Title: Electric light bulb type light source apparatus and translucent cover

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is a national phase entry under 35 U.S.C. §371 of International Application No. PCT/JP2013/001726 filed Mar. 14, 2013, published on Oct. 31, 2013 as WO 2013/161164 A1, which claims priority from Japanese Patent Application No. JP 2012-102465 filed in the Japanese Patent Office on Apr. 27, 2012 and JP 2012-102504, filed in the Japanese Patent Office on Apr. 27, 2012. 
     TECHNICAL FIELD 
     The present technology relates to an electric light bulb type light source apparatus and to a translucent cover used therefor. 
     BACKGROUND ART 
     As an electric light bulb type illumination apparatus, Patent Document 1 describes an illumination apparatus equipped with a speaker. This illumination apparatus includes a cylindrical casing, a speaker provided at a center of a front surface of the casing, and a plurality of light emitting diode (LED) elements arranged around the speaker, similarly on the front surface of the casing. Further, various circuit substrates including drive circuits and the like of the LEDs and the speaker are housed in the casing. The speaker converts electrical signals input into the drive circuit into sound waves through vibration of a diaphragm and emits the sound waves to the outside, to thereby output them as, for example, audio (e.g., see  FIG. 1 ). 
     Patent Document 2 discloses an LED bulb that includes light emitting diodes (LEDs) covered with a globe having an incandescent light bulb shape and emits light from the LEDs to the outside. In this LED bulb, an LED module on which the LEDs are mounted and the globe that covers this LED module are mounted on a heat dissipating unit. Further, a ring-like reflecting plate is provided in a junction portion between the heat dissipating unit and the globe. With this, light beams of light diffused by the globe, which are rearwardly directed, are reflected to the globe. In this manner, a loss of light not emitted to the outside of the LED bulb is reduced (e.g., see  FIG. 8 ).
     Patent Document 1: Japanese Patent   Application Laid-open No. 2008-193189   Patent Document 2: Japanese Patent   Application Laid-open No. 2010-056059   

     SUMMARY OF INVENTION 
     Problem to be Solved by the Invention 
     If an apparatus functions as the speaker as in the illumination apparatus of Patent Document 1, it is necessary to suppress the generation of so-called chattering noise, which is noise in the output of the speaker. For example, it is conceivable that if adjacent members have a gap therebetween in this illumination apparatus and vibration of the speaker is transmitted to these members, chattering noise due to the backlash is caused, which deteriorates the sound quality of the speaker. 
     In an electric light bulb type light source apparatus, the light reflection or the like is sometimes used to efficiently use light from a light source for illumination outside of the apparatus as in the LED bulb of Patent Document 2. How to take out the light from the light source affects the outer appearance of the apparatus. Thus, it is necessary to improve the outer appearance of the electric light bulb type light source apparatus. 
     In view of the above-mentioned circumstances, it is an object of the present technology to provide an electric light bulb type light source apparatus capable of reducing backlash, which results in noise, and improving the sound quality of a speaker. 
     It is another object of the present technology to provide an electric light bulb type light source apparatus having improved outer appearance. 
     Means for Solving the Problem 
     In order to achieve the objects above, an electric light bulb type light source apparatus according to the present technology includes: a speaker; a light source unit; a supporting unit; a casing; and a base. 
     The supporting unit supports the speaker. The supporting unit includes a base portion. The base portion includes a tapered surface and a supporting surface that supports the light source unit. 
     The casing includes an abutting surface against which the tapered surface of the base portion abuts. 
     The base is used for supplying a power to the light source unit and the speaker. 
     The surface of the supporting unit that supports the speaker, which abuts against the casing has a tapered shape, and hence it is possible to reduce backlash between the supporting unit and the casing. Thus, even if vibration of the speaker is transmitted to the supporting unit and the casing, it is possible to reduce the backlash, which results in noise, and improve the sound quality of the speaker. 
     The supporting unit, the speaker, and the base may be arranged such that the base portion is disposed between the speaker and the base. The supporting unit may further include a holding portion that holds the speaker. In this case, the holding portion holds the speaker such that the supporting surface of the base portion faces the speaker. Further, the base portion is disposed around the holding portion. 
     The holding portion of the supporting unit can stably support the speaker without interfering with the arrangement of the light source unit. 
     The tapered surface of the base portion may be a surface formed to approach a center of the base portion as a distance from the supporting surface increases. The holding portion is located at the center of the base portion. 
     The tapered surface is supported by the abutting surface of the casing from a side of the base, such that the position of the base portion can be made stable and the backlash can be reduced. 
     The casing may include a base casing including a tapered surface that abuts against the tapered surface of the base portion as the abutting surface. 
     By the tapered surfaces abutting against each other, the gap between the base portion and the base casing can be reduced, and hence it is possible to suppress the generation of noise. 
     The supporting unit may include a heat sink that forms at least a part of the base portion. In this case, the casing includes a base casing including the abutting surface, which is thermally connected to the heat sink. 
     Even if the heat sink and the base casing are separate members, the backlash between the members can be reduced by the abutting surface of the base casing supporting the tapered surface of the base portion including the heat sink from the side of the base. 
     The tapered surface of the base portion may be a surface formed to be spaced apart from a center of the base portion, at which the holding portion is located, as a distance from the supporting surface increases. 
     The member serving as the casing on the side of the speaker can be stably supported by the tapered surface. 
     The casing may include a translucent cover including a tapered surface that abuts against the tapered surface of the base portion as the abutting surface. 
     By the tapered surfaces abutting against each other, the gap between the base portion and the translucent cover can be reduced, and hence the generation of noise can be suppressed. 
     The translucent cover may include a first opening portion and a second opening portion. The first opening portion includes the tapered surface serving as the abutting surface. The second opening portion is provided to be closed by the speaker. 
     The translucent cover is provided such that the position on the base portion becomes stable by causing the tapered surface of the first opening portion against the tapered surface of the base portion. By this translucent cover being pushed by the speaker supported by the supporting unit from a side of the second opening portion, assembling is performed for reducing the backlash. 
     The electric light bulb type light source may further include a packing provided between the speaker and the translucent cover. 
     By the packing being interposed in the structure in which the opening portion of the translucent cover on the side of the speaker is closed, the gap between the speaker and the translucent cover can be reduced. In addition to the reduction in the gap between the base portion and the translucent cover, an effect of making the space surrounded with the translucent cover more air-tight can be obtained. Thus, it is possible to provide the space surrounded with the translucent cover with the speaker box function and improve the sound quality of the speaker. 
     The tapered surface of the supporting unit may have a taper angle of 30 degrees or more and 60 degrees or less. By the tapered surface tilted in this manner being abutted against the abutting surface, it is possible to stabilize the position relationship between the supporting unit and the casing not only in a horizontal direction but also in a vertical direction. 
     The light source unit may include a light emitting diode (LED) or an electro luminescence (EL) element as a light source element. 
     An electric light bulb type light source apparatus according to the present technology includes: a speaker; a light source unit; a supporting unit; a casing; and a base. 
     The supporting unit supports the light source unit and the speaker. 
     The casing houses the light source unit and the supporting unit. The casing includes a base casing and a translucent cover. The base casing includes a tapered surface. The translucent cover includes an abutting surface that abuts against the tapered surface. 
     The base is used for supplying a power to the light source unit and the speaker. 
     A surface that abuts against the translucent cover of the base casing has a tapered shape, and hence it is possible to reduce the backlash, which results in noise, even if the vibration of the speaker is transmitted to the casing formed by combining the base casing with the translucent cover. 
     The supporting unit includes a holding portion and a base portion. The holding portion holds the speaker. The base portion is disposed around the holding portion. The base portion supports the light source unit. The supporting unit, the speaker, and the base are arranged such that the base portion is disposed between the speaker and the base. 
     The base casing may include an opening end surface. The base portion is placed in the opening end surface. In this case, the tapered surface is disposed around the opening end surface. The tapered surface is a surface formed to approach the base along a direction, in which the speaker, the base portion, and the base are arranged, as a distance from the opening end surface increases. 
     Due to this tapered surface, the translucent cover can be stably disposed at a position of the opening end surface of the base casing on a radially outer side with respect to the opening end surface. 
     The translucent cover may include a tapered surface that abuts against the tapered surface of the base casing as the abutting surface. 
     The casing can be formed not to form a gap by the tapered surfaces abutting against each other, and hence the generation of noise can be suppressed. 
     In order to achieve another object above, an electric light bulb type light source apparatus according to the present technology includes: a speaker; a light source unit; a translucent cover; a supporting unit; and a base. 
     The translucent cover includes a first opening, an input end surface of light that forms the first opening, a second opening, and an output end surface that forms the second opening and outputs light, and guides light from the input end surface to the output end surface. 
     The supporting unit includes an opposed surface that is disposed to be opposed to the input end surface and a holding portion that holds the speaker such that the speaker is placed in the second opening, and supports the speaker and the light source unit. 
     The base is used for supplying a power to the light source unit and the speaker. 
     The supporting unit includes the opposed surface opposed to the input end surface that forms the first opening of the translucent cover, and hence the light emitted from the opposed surface enters the input end surface, is guided in the translucent cover, and emitted from the output end surface that forms the second opening. Thus, the speaker is placed in the second opening, and hence the light from the opposed surface seems to be emitted from around the speaker and the outer appearance is improved. 
     The supporting unit may include a heat sink including the opposed surface and a supporting surface that supports the light source unit. With this, the electric light bulb type light source apparatus can exert a heat dissipation function and can support the translucent cover by the use of the heat sink. 
     The opposed surface may be a tapered surface formed in the heat sink. With this, the fixing state of the translucent cover and the heat sink is made stable and the entire rigidity of the translucent cover and the heat sink can be increased. Further, by the input end surface of the translucent cover abutting against the tapered surface, the gap between the translucent cover and the heat sink can be reduced. Thus, it is possible to prevent noise (chattering noise), which is caused by the vibration of the speaker, from being generated. 
     The heat sink may be formed in a ring shape around the holding portion. With this, the heat sink can support the ring-like light source unit. 
     The supporting unit may include a base casing including the opposed surface. With this, the electric light bulb type light source apparatus can support the translucent cover by the use of the base casing. 
     The opposed surface may be a tapered surface formed in the base casing. With this, the fixing state of the translucent cover and the base casing becomes stable, and the entire rigidity of the translucent cover and the base casing can be improved. Further, by the input end surface of the translucent cover abutting against the tapered surface, the gap between the translucent cover and the base casing can be reduced and it is possible to prevent noise (chattering noise), which is caused by the vibration of the speaker, from being generated. 
     The supporting unit may include a heat sink formed in a ring shape around the holding portion and supporting the light source unit. In this case, the base casing may include an opening in which the heat sink is placed. With this, the base casing can support the heat sink. 
     The base casing may include a tapered abutting surface that forms an end surface of the opening together with the opposed surface, against which the heat sink abuts. With this, the supporting unit can stably support the heat sink by the use of the base casing. Further, by the heat sink abutting against the tapered abutting surface, the gap between the heat sink and the base casing can be reduced. Thus, it is possible to prevent noise (chattering noise), which is caused by the vibration of the speaker, from being generated. 
     The input end surface of the translucent cover or the opposed surface of the supporting unit may include a colored region that is colored to reflect color light. With this, the translucent cover can emit colored light in the colored region from the output end surface, and hence the region around the speaker seems to be colored, which contributes to an improvement of the appearance. 
     Another electric light bulb type light source apparatus according to the present technology may include a sensor instead of the above-mentioned speaker. 
     A translucent cover according to the present technology includes an input end surface and an output end surface. 
     The input end surface forms a first opening in which an opposed surface provided in a supporting unit that supports a speaker and a light source unit can be placed, upon which light is incident. 
     The output end surface forms a second opening in which the speaker supported by the supporting unit can be placed, from which light is emitted. 
     Further, the translucent cover covers the light source unit supported by the supporting unit and guides the light incident upon the input end surface to the output end surface. 
     The supporting unit includes the opposed surface opposed to the input end surface that forms the first opening of the translucent cover, and hence light emitted from the opposed surface enters the input end surface, is guided in the translucent cover, and emitted from the output end surface that forms the second opening. Thus, the sensor is placed in the second opening, and hence the light from the opposed surface seems to be emitted from around the sensor and the outer appearance is improved. 
     Effect of the Invention 
     As described above, according to the present technology, it is possible to provide an electric light bulb type light source apparatus capable of reducing backlash, which results in noise, and improving the sound quality of a speaker. 
     Further, according to the present technology, it is possible to improve the outer appearance of the electric light bulb type light source apparatus. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  A perspective view showing an electric light bulb type light source apparatus according to an embodiment of the present technology. 
         FIG. 2  A schematic cross-sectional view of the electric light bulb type light source apparatus shown in  FIG. 1 . 
         FIG. 3  A cross-sectional view showing a speaker according to the embodiment. 
         FIG. 4  A perspective view showing a heat sink of a base portion of a supporting unit. 
         FIG. 5  A perspective view showing a base casing on which the heat sink is provided. 
         FIG. 6  A perspective view showing a holding material of the supporting unit. 
         FIG. 7  A perspective view as a substrate housing box of the supporting unit is viewed from below. 
         FIG. 8  A view showing a positional relationship between a power-supply substrate and another substrate (drive substrate and control substrate). 
         FIG. 9  A block diagram showing an electrical configuration of a light source apparatus. 
         FIG. 10  A schematic cross-sectional view showing an electric light bulb type light source apparatus according to another embodiment of the present technology. 
         FIG. 11  A schematic cross-sectional view showing an electric light bulb type light source apparatus according to still another embodiment of the present technology. 
         FIG. 12  A schematic cross-sectional view showing a modified example of the electric light bulb type light source apparatus. 
         FIG. 13  A perspective view showing an electric light bulb type light source apparatus according to a fourth embodiment of the present technology. 
         FIG. 14  A partially broken view of the electric light bulb type light source apparatus shown in  FIG. 13 . 
         FIG. 15  A schematic cross-sectional view of the electric light bulb type light source apparatus shown in  FIG. 13 . 
         FIG. 16  A perspective view showing a translucent cover. 
         FIG. 17  A perspective view showing a heat sink of the supporting unit. 
         FIG. 18  A view showing a part of each of the heat sink and the translucent cover. 
         FIG. 19  A cross-sectional view showing an electric light bulb type light source apparatus according to a fifth embodiment of the present technology. 
     
    
    
     MODE(S) FOR CARRYING OUT THE INVENTION 
     Hereinafter, embodiments of the present technology will be described with reference to the drawings. 
     First Embodiment 
     (Entire Configuration of Electric Light Bulb Type Light Source Apparatus) 
       FIG. 1  is a perspective view showing an electric light bulb type light source apparatus according to an embodiment of the present technology.  FIG. 2  is a schematic cross-sectional view of the electric light bulb type light source apparatus  100  shown in  FIG. 1 . In the following description, the electric light bulb type light source apparatus will be simply referred to as a light source apparatus. 
     A light source apparatus  100  includes a casing  10 , a light source unit  40  placed in the casing  10 , a speaker  30  provided on one end portion of the casing  10 , and a base  15  that is connected to the other end portion of the casing  10  (opposite side of speaker  30 ) via an insulating ring  16  being an electrical insulator. 
     For the sake of description, the descriptions will be made hereinafter assuming that a direction along a z-axis in  FIGS. 1 and 2  is front and rear directions of the light source apparatus  100 , specifically, a side of the speaker  30  is a front side and a side of the base  15  is a rear side. 
     The casing  10  includes, for example, a base casing  12  and a translucent cover  11  provided on the front side of the base casing  12 . As shown in  FIG. 2 , a second opening portion  11   b  and a first opening portion  11   a  are formed in the translucent cover  11 . The second opening portion  11   b  is provided in an end portion on the front side. The first opening portion  11   a  is located on the opposite side thereof along a z-axis direction. The speaker  30  is provided to close the second opening portion  11   b . The base casing  12  is provided on a side of the first opening portion  11   a  of the translucent cover  11 . The translucent cover  11  is formed of, for example, glass, acrylic, or polycarbonate. 
     The light source apparatus  100  includes a supporting unit  20  that supports the speaker  30 . The supporting unit  20  includes a tubular holding portion  211  that holds the speaker  30  and a base portion  29  disposed around this holding portion  211 . The light source unit  40  is supported by the base portion  29  of the supporting unit  20 . The supporting unit  20  integrally supports the light source unit  40 , the speaker  30 , and the base  15  such that the light source unit  40  is disposed between the speaker  30  and the base  15  with the speaker  30  and the light source unit  40  being spaced apart from each other. With this, the supporting unit  20 , the speaker  30 , and the base  15  are arranged such that the base portion  29  is disposed between the speaker  30  and the base  15 . 
     As shown in  FIG. 2 , the supporting unit  20  typically includes a heat sink  23 , a holding material  21  that is fixed to this heat sink  23  and holds the speaker  30 , and a substrate housing box  22  that is disposed to be opposed to the holding material  21 . The holding material  21  is a member including the holding portion  211  of the supporting unit  20 . The heat sink  23  is a member that forms at least a part of the base portion  29 . 
     The heat sink  23  of the supporting unit  20  functions as a chassis of this light source apparatus  100 . The heat sink  23  is disposed around a center axis C (see  FIG. 2 ) being an axis passing through a center of the speaker  30  along a vibration direction (z-axis direction) of a diaphragm  35  (see  FIG. 3 ) of the speaker  30 . “Around the axis” includes both concepts of entirely around the axis and partially around it. Typically, the heat sink  23  has a plate shape and is formed entirely around the center axis C, that is, in a ring shape. 
     The light source unit  40  is disposed around the center axis C as in the heat sink  23 . Typically, the light source unit  40  is formed in a ring shape and disposed on the heat sink  23 . For example, the light source unit  40  includes a ring-like mounting substrate  46  and a plurality of LED (Light Emitting Diode) elements  45  arranged in a ring shape on the mounting substrate  46 . Although an element that generates white light is used as one LED element  45 , an element that generates single color light or multiple color light other than the white light may be used. The mounting substrate  46  is connected to the heat sink  23  with a screw (not shown), for example. With this, the supporting unit  20  may integrally support the light source unit  40 . 
     Although the heat sink  23  is mainly formed of, for example, aluminum, another metal material such as copper may be used as long as it is a material having a relatively high thermal conductivity. 
     The base  15  is configured to be mountable on a socket for a general incandescent light bulb. The base  15  is a member that supplies a power to a circuit substrate on which various circuits are mounted, the light source unit  40 , and the speaker  30  via a power-supply circuit  55  to be described later. 
     A length of the light source apparatus  100  in the z-axis direction is 100 to 120 mm, typically, about 110 mm. A diameter of the light source apparatus  100  as viewed in the z-axis direction is 50 to 70 mm, typically, about 60 mm. 
     (Specific Configuration of Speaker) 
       FIG. 3  is a cross-sectional view showing the speaker  30  according to the embodiment. This speaker  30  is a damper-less dynamic speaker. The speaker  30  includes a frame  31 , a permanent magnet  32 , plates  33 , a yoke  34 , the diaphragm  35 , an edge  36 , a coil bobbin  37 , a magnetic fluid  38 , and an attachment bottom portion  39 . 
     The magnetic fluid  38  that replaces the conventional damper is provided between a magnetic gap between the yoke  34  and the upper plate  33 . A voice coil (not shown) is also provided in this magnetic gap. A screw hole  39   a  is formed in the attachment bottom portion  39 . As will be also described later, the speaker  30  is fixed to the holding material  21  of the supporting unit  20  via this screw hole  39   a  with a screw S 3  (see  FIG. 2 ). 
     As will be also described later, in this embodiment, the speaker  30  and the light source unit  40  are provided spaced apart from each other, and hence the speaker  30  is unlikely to be affected by the heat of the light source unit  40 . Thus, as the permanent magnet  32  used for the speaker  30 , a permanent magnetic having a relatively low thermal resistance, that is, a relatively low demagnetization temperature. For example, a permanent magnetic having a demagnetization temperature of 60° C. or more to 100° C. or less can be used. Neodymium is exemplified as a permanent magnetic having a demagnetization temperature of 100° C. or less. 
     A magnetic force of the neodymium magnet is higher than a magnetic force of a ferrite core magnet or the like. The demagnetization temperature of the neodymium is about 80° C. and relatively lower than that of the ferrite. If the ferrite core magnet is applied to the speaker  30  of the light source apparatus  100  according to this embodiment, the ferrite core magnet has to be increased in size in order to obtain a magnetic force equal to that of the neodymium magnet, and hence it is not suitable for downsizing of the light source apparatus  100 . Reducing the heat generated by the light source unit  40  in order to prevent the permanent magnet from being demagnetized is conceivable. However, it means reducing an input power to the light source apparatus  100  and the luminous flux decreases. 
     Therefore, in this embodiment, the neodymium having a lower thermal resistance than that of the ferrite but having a larger magnetic force than that of the ferrite is used and the speaker  30  and the light source unit  40  are provided spaced apart from each other, to thereby solve the above problem. 
     For example, at least a part of the frame  31  of the speaker  30  and at least a part of the edge  36  may be formed of a translucent material. As the translucent material, a well-known material such as an acrylic-based resin material, a polyvinyl-based resin material, and a polyimide-based resin material are used. With this, light emitted from the light source unit  40  passes through a part of the speaker  30 , and hence it is possible to increase light distribution characteristics leaning to the center of the light source apparatus  100 . 
     (Specific Configuration of Supporting Unit) 
       FIG. 4  is a perspective view showing the heat sink  23  of the base portion  29  of the supporting unit  20 . As shown in  FIG. 2 , the base portion  29  of the supporting unit  20  includes a tapered surface  231  and a supporting surface  232  that supports the light source unit  40 . As shown in  FIG. 4 , the tapered surface  231  and the supporting surface  232  typically includes the heat sink  23 . As shown in  FIG. 2 , the supporting surface  232  of the heat sink  23  faces the speaker  30 . 
     The tapered surface  231  is a surface formed to approach a center of the base portion  29  as a distance from the supporting surface  232  increases. “The center of the base portion  29 ” means a position of the holding portion  211  surrounded by the base portion  29 , typically, a position which the center axis C (see  FIG. 2 ) passes through. As shown in  FIG. 4 , the tapered surface  231  is provided on a side of the heat sink  23 , which is opposite to the supporting surface  232 , and tilted such that the outer periphery of the heat sink  23  is reduced in diameter as approaching the side of the base  15  (rear side). A taper angle of this tapered surface  231  with respect to the x-y plane is, for example, 30 degrees or more and 60 degrees or less. 
       FIG. 5  is a perspective view showing the base casing  12  in which the heat sink  23  is provided. As shown in  FIG. 5 , the base casing  12  is opened at one end side (front side) (in bowl shape) and includes a tapered abutting surface  12   a  at an opened end portion thereof. As shown in  FIG. 2 , the tapered surface  231  of the heat sink  23  abuts against the abutting surface  12   a . Typically, a tapered surface along the tapered surface  231  is formed as the abutting surface  12   a  on an inner peripheral side of the opening end portion of the base casing  12 . The supporting unit  20  is disposed on the opening end portion on the front side of the base casing  12  such that the tapered surface  231  is fitted into the abutting surface  12   a.    
       FIG. 6  is a perspective view showing the holding material  21  of the supporting unit  20 . The holding material  21  includes the holding portion  211  on which the speaker  30  is mounted and a flange portion  212  provided to an end portion on the rear side of the holding portion  211 . The holding material  21  is placed in the casing  10  such that the holding portion  211  passes through holes at centers of the heat sink  23  and the light source unit  40  and the holding portion  211  has a longitudinal direction in the z-axis direction. 
     A screw hole  215  is provided in an end surface on the front side of the holding portion  211 . The screw S 3  (see  FIG. 2 ) is inserted in the screw hole  39   a  formed in the screw hole  215  and the speaker  30 . With this, the speaker  30  is held by the holding material  21 . The means for mounting the speaker  30  on the holding material  21  is not limited to screwing and may be adhesion with an adhesive or engagement of concave and convex members. 
     As shown in  FIG. 2 , the holding material  21  is fixed to the heat sink  23  with a screw S 1 . Specifically, a fixing portion  213  for screwing is formed in the flange portion  212  of the holding material  21  to protrude to the rear side. The heat sink  23  is disposed on the flange portion  212  and the holding material  21  is fixed to the heat sink  23  via the fixing portion  213  from a rear surface side (rear side) of the heat sink  23 . 
     As described above, the heat sink  23  mainly forms the base portion  29  of the supporting unit  20 . The base portion  29  of the supporting unit  20  also includes the flange portion  212  of the holding material  21 . The supporting unit  20  holds the speaker  30  through the holding portion  211  of the holding material  21  such that the supporting surface  232  of the base portion  29  faces the speaker  30 . The thus configured supporting unit  20  can stably support the speaker  30  without interfering with the arrangement of the light source unit  40  provided in the supporting surface  232  of the base portion  29 . 
     With such configurations of the holding material  21  and the heat sink  23 , as also described above, the light source unit  40  is provided spaced apart from the speaker  30  on the rear side, and hence it is possible to reduce the thermal effect of the light source unit  40  on the speaker  30 . With this, it is possible to favorably maintain the function of the speaker  30 . For example, if the thermal effect on the speaker  30  is large, there is a fear that the permanent magnet  32  provided in the speaker  30  is demagnetized. However, with the light source apparatus  100  according to this embodiment, such a fear can be eliminated. 
     Further, although the speaker  30  is disposed on the light outputting side of the light source unit  40 , that is, in the position in which it shields the output light, the light source unit  40  is formed in a ring shape, and hence a light distribution angle is increased. Further, the light source unit  40  can evenly distribute light with respect to the center axis C. 
     In this embodiment, the holding portion  211  of the holding material  21  that holds the speaker  30  is disposed at the center of the base portion  29  that supports the light source unit  40 . Therefore, it is possible to reduce the arrangement space for the holding material  21  and the light source unit  40  in the electric light bulb type light source apparatus  100  and thus to increase the arrangement density of these members. Thus, it is possible to downsize the light source apparatus  100  even while ensuring a desired light distribution angle. 
     The holding portion  211  of the holding material  21  may be provided with a reflecting portion that reflects light emitted from the light source unit  40 . The reflecting portion is, for example, a mirror surface or a portion made of a material having a color with a high optical reflectance. The color with a high optical reflectance is, for example, white, milky white, or a color close thereto. Of course, the holding material  21  itself may be made of a white or milky white resin material. Although acrylonitrile butadiene styrene (ABS), polybutylene terephthalate (PBT), or the like is used as the resin material, another material may be used. The reflecting portion may be provided as a member separated from the holding portion  211  of the holding material  21 . 
     Further, if the reflecting portion is made of the material in white, milky white, or the like, the reflecting portion can diffuse and reflect (scatter) light. Alternatively, also if the reflecting portion is a reflecting surface subjected to blasting, the reflecting surface can diffuse and reflect light. 
     As described above, by the provision of the reflecting portion, it is possible to increase the light distribution angle of the output light from the light source unit  40  and to efficiently use the light of the light source unit  40 . Thus, it is possible to increase the intensity of illumination. 
       FIG. 7  is a perspective view as the substrate housing box  22  of the above-mentioned supporting unit  20  is viewed from below. The substrate housing box  22  includes a main body  221 , abutting plates  222  that are provided to protrude from the main body  221  in a direction perpendicular to the z-axis, and a protrusion  223  that is provided to protrude from the main body  221  in the z-axis direction. In  FIG. 7 , although the plurality of abutting plates  222  having different shapes are provided, only one abutting plate  222  may be provided. 
     Further, a connection hole  224  through which a conduction connector (not shown) is connected is formed in the main body  221 . The plurality of connection holes  224  may be provided. 
     As shown in  FIG. 2 , the main body  221  is erected along the z-axis direction. In addition, the main body  221  is placed in the casing  10  such that the abutting plates  222  abut against the flange portion  212  of the holding material  21  and the holding material  21  and the substrate housing box  22  are opposed to each other. A circuit substrate is placed in a region formed in the holding material  21  and the substrate housing box  22  that are arranged in this manner, that is, a region in the holding portion  211  and the main body  221 . A plurality of, for example, two circuit substrates are provided (drive substrate  61  and control substrate  62 ). As will be also described later, the drive substrate  61  is provided as a common single substrate on which an LED drive circuit  614  and the audio amplifier (AMP)  613  (see  FIG. 9 ) to be described later are mounted. 
     The protrusion  223  is, as shown in  FIG. 2 , placed within the base  15  to be inserted into an opening end portion  12   b  on the rear side of the base casing  12 . The protrusion  223  is formed in a tubular shape. A lead wire (not shown) that connects a terminal of a head top portion of the base  15  with a power-supply substrate  50  to be described later is placed to pass through the protrusion  223 . 
     The substrate housing box  22  is made of a non-conductive material, for example, mainly an ABS resin material as in the above-mentioned holding material  21 . In this manner, a material favorable as an electrically insulating material and a fire-retardant material are used for the holding material  21  and the substrate housing box  22 . 
     A plurality of openings  214  are formed in the holding portion  211  of the holding material  21 . With this, in the casing  10 , a region outside the holding portion  211  of the holding material  21  and a region inside the holding portion  211  and the substrate housing box  22  communicate with each other via the openings  214 . With such a configuration, in the casing  10 , only the region outside the holding portion  211  but also the region inside the holding portion  211  and the substrate housing box  22  can be used as an enclosure of the speaker  30 . With this, the capacity of the enclosure increases and the sound quality of the speaker  30  is improved. Note that only one opening  214  may be formed in the holding portion  211 . 
     The base casing  12  is made of a material having a relatively high thermal conductivity, for example, mainly aluminum. As the material of the base casing  12 , as long as it is a material having a relatively high thermal conductivity, another metal material such as copper may be used. Alternatively, the material of the base casing  12  may be a resin having a high heat dissipation or ceramic. The heat sink  23  and the base casing  12  are thermally connected to each other. As shown in  FIG. 2 , for example, the abutting surface  12   a  provided in the base casing  12  and the tapered surface  231  of the heat sink  23  abut against each other directly or via a thermally conductive sheet or the like, to thereby establish thermal conduction between these members. With this, heat generated from the light source unit  40  is efficiently dissipated to the outside via the heat sink  23  and the base casing  12 . 
     Note that the main material of the heat sink  23  and the base casing  12  may be different. 
     In the structure of the light source apparatus  100  having the speaker  30 , it is conceivable that vibration of the speaker  30  is transmitted to the supporting unit  20  and the base casing  12  configured as separate members. In general, as a phenomenon that can occur in the members to which the vibration of the speaker is transmitted, the generation of the chattering noise due to backlash if a minute gap is formed between the members adjacent to each other or if they are not stably assembled is exemplified. 
     Therefore, in this embodiment, as also described above, the tapered surface  231  on the side of the base  15  is provided as a surface that abuts against the base casing  12  of the supporting unit  20  connected to the speaker  30  and the tapered surface  231  is supported from the side of the base  15 , to thereby reduce the backlash. In addition, the abutting surface  12   a  of the base casing  12  also has the tapered shape that abuts against the tapered surface  231 , and hence the supporting unit  20  can be disposed with a stable structure by fitting the tapered surface  231  along the abutting surface  12   a . In this manner, the tapered surfaces abut against each other, and hence the gap between the supporting unit  20  and the base casing  12  can be reduced. Thus, even if the vibration of the speaker  30  is transmitted, the generation of noise can be suppressed. That is, the supporting unit  20  and the base casing  12  function as a mechanical earth that reduces the effect of the vibration of the speaker  30 . 
     As an comparison example, in a structure of fitting as in a bulb-shaped lamp disclosed in Japanese Patent No. 4659130, a disk like mount member on which the light source is mounted is fitted into an inner peripheral surface of a cylindrical case, an outer peripheral surface of the mount member and the inner peripheral surface of the case abut against each other in a horizontal direction. With such a structure, it is difficult to bring the inner peripheral surface of the case into close contact with the outer peripheral surface of the mount member. If the vibration of the speaker is transmitted to this configuration, there is a fear that noise due to backlash between the members is caused. In particular, if the case has a thin cylindrical shape, when the vibration is transmitted thereto, the chattering noise is easily generated and the effect on the sound quality becomes large. 
     However, in the case of the light source apparatus  100 , due to the tilt of the tapered surface  231 , the heat sink  23  is disposed on the abutting surface  12   a  of the base casing  12  while pushing the abutting surface  12   a  of the base casing  12  positioned around it in a vertical direction (direction of base  15 ). Therefore, the heat sink  23  including the tapered surface  231  can stabilize the position relationship between the supporting unit  20  and the base casing  12  not only in a horizontal direction but also in the vertical direction. Further, by the tapered surfaces abutting against each other, the heat sink  23  can be disposed to be pushed on the base casing  12  and held in close contact with it. Thus, even if the base casing  12  is formed with a thin wall, the tapered surface  231  can reliably prevent the backlash and reduce the generation of noise when the vibration is transmitted thereto. 
     Further, in manufacturing the light source apparatus  100 , the heat sink  23  can be fitted into the base casing  12  along the tapered surface  231 , and hence, for example, it is unnecessary to align the position of an outer peripheral surface of the heat sink  23  with the position of an inner peripheral surface of the base casing  12  with high accuracy and assembling becomes easy. For example, the heat sink  23  can be provided by sliding down the tapered surface  231  of the heat sink  23  along the bowl-like, tapered surface of the base casing  12 , and hence it is possible to bring the heat sink  23  into close contact with the base casing  12  without strict dimensional accuracy and ensure heat transfer. In particular, if the tapered surface  231  has a taper angle of, for example, 30 degrees or more and 60 degrees or less, the tapered surface  231  is supported on the abutting surface  12   a  of the base casing  12  in the horizontal direction and the vertical direction, and hence it is possible to easily and reliably position them and bring them into close contact with each other and to reduce the backlash. 
     Referring to  FIG. 2 , the translucent cover  11  is disposed on the base casing  12  such that the opening end portion in which the abutting surface  12   a  of the base casing  12  is provided and the first opening portion  11   a  of the translucent cover  11  face each other. The supporting unit  20  supports the speaker  30  such that the translucent cover  11  is pushed on the heat sink  23  by the speaker  30 , and sandwiches the translucent cover  11  between the speaker  30  and itself (supporting unit  20 ). 
     As described above, the speaker  30  supported by the supporting unit  20  serves to sandwich the translucent cover  11  with the heat sink  23  and push and support the translucent cover  11  on the heat sink  23 . Therefore, it is unnecessary to directly fix the translucent cover  11  on the heat sink  23  and the speaker  30 . Thus, even if the translucent cover  11  having a thermal expansion coefficient different from a thermal expansion coefficient of each of the heat sink  23  and (the frame  31  of) the speaker  30  is thermally expanded due to a change in temperature of the light source unit  40 , deformation due to the thermal expansion of each of the opening portions  11   a  and  11   b  respectively facing the heat sink  23  and the speaker  30  can be tolerated and stress of the thermal expansion can be released. Thus, the generation of mechanical stress in the translucent cover  11 , which deteriorates the translucent cover  11 , can be suppressed. 
     (Configurations of Various Circuit Substrates) 
     As shown in  FIG. 2 , the power-supply substrate  50  on which the power-supply circuit  55  is mounted is placed in the base casing  12 . The power-supply substrate  50  is fixed to the holding material  21  with a screw S 2 . Further, the power-supply substrate  50  is also fixed to the heat sink  23  with the above-mentioned screw S 1  that connects the holding material  21  to the heat sink  23 . 
     In general, from the perspective of adaptability of the LED bulb to an illumination device, it is desirable to downsize the LED bulb while making the LED bulb as close as possible to the incandescent light bulb shape. If the product size of the LED bulb is significantly increased, the product value is reduced. If the power-supply substrate and the LED drive circuit substrate are arranged in the same plane or arranged along parallel planes, the product size is increased and the outer periphery of the casing near the base is also increased in size. From the perspective of the adaptability of the illumination device, it is ideal to realize an LED bulb with the size of an outer periphery of a casing near the base being made close to that of the incandescent light bulb. Therefore, also from such a perspective, a product with the power-supply substrate and the other circuit substrate being arranged in the same plane as described above leads to a reduction in product value. In view of this, in the present technology, the circuit substrates are arranged in the following manner. 
       FIG. 8  is a view showing a position relationship between the power-supply substrate  50  and the other substrates (drive substrate  61  and control substrate  62  described above). The power-supply substrate  50  includes an opening region  50   a . The drive substrate  61  and the control substrate  62  are partially placed in the opening region  50   a.    
     Typically, the opening region  50   a  is made of a through-hole. In other words, the power-supply substrate  50  is formed in a ring shape. Specifically, as shown in  FIG. 2 , the main body  221  of the substrate housing box  22  is inserted into the opening region  50   a . With this, the drive substrate  61  and the control substrate  62  that are placed in the substrate housing box  22  and the holding material  21  are arranged to perpendicularly cross the power-supply substrate  50  via the through-hole of the power-supply substrate  50 . 
     In this manner, the drive substrate  61  and the control substrate  62  are arranged to be inserted into the through-hole of the power-supply substrate  50 , and hence it is possible to efficiently arrange the parts in a small housing space of the casing  10  and to downsize the light source apparatus  100 . 
     Specifically, an envelope shape of the entire substrates disposed as described above is similar to the shape obtained by disposing two schematic triangular shapes oppositely to each other along the z-axis direction. This shape is similar to an outline of the casing  10  in which the base casing  12  and the translucent cover  11  are fitted when the light source apparatus  100  is viewed from the side. That is, by disposing the substrates  50 ,  61 , and  62  as described above, it is possible to increase the density of the parts in the casing  10 , which can downsize the light source apparatus  100 . 
     Further, it is possible to arrange the substrates  50 ,  61 , and  62  in the casing  10  at a high density and to ensure a sufficient capacity as the enclosure of the speaker  30 . Thus, it is possible to improve the sound quality of the speaker  30 . 
     As shown in  FIG. 8 , a receiver (or light receiver)  628 , an antenna  626 , and a network control circuit  627  are mounted on the control substrate  62 . 
     The receiver  628  receives an infrared signal transmitted by a remote controller (not shown) that can be used by a user. The position and attitude of the control substrate  62  are set such that the receiver  628  is positioned at a position in the casing  10 , at which it can receive the infrared signal, that is, in a region in the translucent cover  11  (region on front side with respect to light source unit  40 ). For example, the receiver  628  is mounted on the end portion on the front side of the control substrate  62 . The remote controller (not shown) is, for example, a device that generates signals about turn on, turn off, light control, color control, and the like of the light source unit  40 . 
     The antenna  626  is typically an antenna for short-distance wireless communication such as Bluetooth. Further, the network control circuit  627  is configured in accordance with the communication standard. The position and attitude of the drive substrate  61  are set such that the antenna  626  is positioned at a position in the casing  10 , at which it can receive the wireless signal, that is, a region in the translucent cover  11  (region on front side with respect to light source unit  40 ). For example, audio video (AV) device that is a target device operated by the user transmits a wireless signal and the antenna  626  receives the wireless signal. A signal transmitted by the AV device is, for example, a signal about volume, reproduction, stop, and the like of sound from the speaker  30 . The AV device may be a portable device. 
     Note that the antenna  626  and the network control circuit  627  may be compliant with a communication standard for configuring wireless fidelity (WiFi), ZigBee, a wireless local area network (LAN), or the like in addition to the Bluetooth. 
     The power-supply substrate  50  includes a first face  51  opposed to the side of the base  15  and a second face  52  opposed to the side of the light source unit  40 . Further, the power-supply circuit  55  on which the power-supply substrate  50  is mounted includes a transformer  56 T (see  FIG. 2 ) including a primary side coil and a secondary side coil and primary side electronic components  56  that are electrically connected to the primary side coil. The transformer  56 T and the primary side electronic components  56  are mounted on the first face  51  of the power-supply substrate  50 . 
     In this manner, the transformer  56 T and primary side electronic components  56  having a relatively large size are arranged on the side of the base  15  of the power-supply substrate  50 , and hence parts different from the power-supply circuit  55 , for example, the light source unit  40  and the supporting unit  20  can be partially placed in the space on the front side with respect to the second face  52 . With this, the narrow space in the casing  10  (or the base casing  12 ) can be efficiently used. 
     (Electrical Configuration of Light Source Apparatus) 
       FIG. 9  is a block diagram showing an electrical configuration of the light source apparatus  100 . 
     The light source apparatus  100  includes a filter  53 , a rectification smoothing circuit  54 , an isolated DC/DC converter  57 , the LED drive circuit  614 , the audio AMP  613 , and the network control circuit  627 , and the antenna  626 . A commercial power-supply  150  supplies a power to the power-supply circuit  55  via the base  15  of the light source apparatus  100 . 
     The filter  53 , the rectification smoothing circuit  54 , and the isolated DC/DC converter  57  are the power-supply circuit  55  and mounted on the power-supply substrate  50  as described above. The isolated DC/DC converter  57  includes the above-mentioned transformer  56 T. The isolated DC/DC converter  57  is used in the power-supply circuit  55 , in which the primary side circuit and the secondary side circuit are electrically insulated from each other. 
     The LED drive circuit  614  and the audio AMP  613  are mounted on the drive substrate  61  as described above. The LED drive circuit  614  controls the turn-on, turn-off, light control, color control, and the like of the light source unit  40 . The audio AMP  613  is a drive circuit for the speaker  30  and controls the volume, reproduction, stop, and the like of sound of the speaker  30 . 
     As described above, the network control circuit  627  and the antenna  626  form a part of a control circuit  625  and mounted on the control substrate  62 . The network control circuit  627  outputs, based on a single received via the receiver  628  and the antenna  626 , content information of the received signal to the LED drive circuit  614  and the audio AMP  613 . 
     (Configuration of Ground Connection of Electrical Circuit) 
     As shown in  FIG. 2 , a ground connection pattern  59  on the secondary side is formed on the first face  51  of the power-supply substrate  50 . The ground connection pattern  59  is conducted to the heat sink  23  and the base casing  12  via the screw S 1 . In other words, the heat sink  23  and the base casing  12  serve as an electrical ground of the power-supply circuit  55 . 
     In this manner, in this embodiment, an insulated type power-supply circuit is used and the secondary side circuit is connected to the ground. Thus, it is possible to obtain a suitable electro magnetic susceptibility (EMS) without generating electro magnetic interference (EMI) and the like and to satisfy the condition of the electro magnetic compatibility (EMC). That is, in the present technology, it is possible to reduce leak of high frequency noise from the drive substrate  61  and the like and to also reduce leak of radiation noise from the speaker  30 . Further, of course, it is possible to also prevent exogenous noise from entering the casing  12 . 
     By carrying out such an EMC measure on the light source apparatus  100 , this light source apparatus  100  can be applied also to a so-called smart house. 
     Second Embodiment 
       FIG. 10  is a schematic cross-sectional view of a light source apparatus  200  according to another embodiment of the present technology. Hereinafter, descriptions of the same members, functions, and the like as those of the light source apparatus  100  according to the embodiment shown in  FIG. 1  and the like will be simplified or omitted and different points will be mainly described. The light source apparatus  200  includes a translucent cover  110  of the casing  10 , which serves as the casing on the side of the speaker  30 . The light source apparatus  200  includes a heat sink  230  that mainly forms the base portion  29  of the supporting unit  20 . 
     As shown in  FIG. 10 , the heat sink  230  of the light source apparatus  200  includes the tapered surface  231  (first tapered surface) as the tapered surface that abuts against the abutting surface  12   a  of the base casing  12 . The heat sink  230  further includes a tapered surface  233  (second tapered surface), which is formed to be spaced apart from the center of the base portion  29  as the distance from the supporting surface  232  increases. The tapered surface  233  is typically provided around the supporting surface  232  on a side of the heat sink  230 , which faces the speaker  30 , and has a shape tilted such that an outer periphery thereof is reduced in diameter as approaching the speaker  30 . The tapered surface  233  has a taper angle of, for example, 30 degrees or more and 60 degrees or less. This tapered surface  233  enables the supporting unit  20  to stably support the translucent cover  110 . 
     On the other hand, the translucent cover  110  includes a first opening portion  11   c  including a tapered abutting surface  111  that abuts against the tapered surface  233  of the heat sink  230 . The translucent cover  110  can be disposed on the base portion  29  such that the abutting surface  111  of the first opening portion  11   c  faces the tapered surface  233  of the supporting unit  20 . Further, the tapered surfaces abut against each other, and hence the gap between the base portion  29  and the translucent cover  110  can be reduced. Thus, even if the vibration is transmitted from the speaker  30 , the generation of noise can be suppressed. 
     In addition, the translucent cover  110  of the light source apparatus  200  includes the second opening portion  11   b  provided to be closed by the speaker  30 . The translucent cover  110  of the light source apparatus  200  is pushed by the speaker  30  supported by the supporting unit  20  from a side of the second opening portion  11   b  to a side of the base portion  29 . The position of the translucent cover  110  on the tapered surface  233  of the base portion  29  becomes stable, and hence it becomes easy to assemble the structure that sandwiches and supports the translucent cover  110  between the base portion  29  and the speaker  30  and the backlash is also reduced. 
     As described above, in the case of the light source apparatus  100 , the abutting surface against which the tapered surface abuts is formed in the base casing  12  of the casing  10 . However, as in the above-mentioned light source apparatus  200  according to this embodiment, the abutting surface may be formed in the translucent cover  110  of the casing  10 . According to this embodiment, with either the structure in which the tapered surface  231  of the base portion  29  abuts against the abutting surface  12   a  of the casing  10  (base casing  12 ) or the structure in which the tapered surface  233  of the base portion  29  abuts against the abutting surface  111  of the casing  10  (translucent cover  110 ), it is possible to obtain an effect of reducing noise due to the vibration of the speaker  30 . 
     Third Embodiment 
       FIG. 11  is a schematic cross-sectional view showing a light source apparatus  300  according to still another embodiment of the present technology. As shown in  FIG. 11 , the casing  10  of the light source apparatus  300  includes the translucent cover  110  similar to the light source apparatus  200  and a base casing  120  including a tapered surface  12   c  provided to be opposed to a first opening portion  1   c  of the translucent cover  110 . The base casing  120  includes an opening end surface in which the base portion  29  is placed. The opening end surface of the base casing  120  includes the abutting surface  12   a  against which the heat sink  23  abuts, for example. The tapered surface  12   c  is a surface that is disposed around the opening end surface (abutting surface  12   a ) of the base casing  120  and formed to extend to the rear side as a distance from the opening end surface increases. For example, the tapered surface  12   c  has a shape tilted such that an outer periphery thereof is reduced in diameter as approaching the speaker  30  as in the tapered surface  233  of the heat sink  230  of the light source apparatus  200 , which is provided on the side of the translucent cover  110 . 
     Even if the tapered surface that abuts against and supports the translucent cover  110  is included not in the base portion  29  but in the base casing  120  in this manner, the same effects as described above can be obtained. In this embodiment, even if the vibration of the speaker  30  is transmitted to the casing  10  formed combining the base casing  120  with the translucent cover  110 , it is possible to reduce the backlash, which results in noise. 
     Modified Example 
       FIG. 12  is a schematic cross-sectional view showing a light source apparatus  400  as a modified example to which the configuration of the light source apparatus  200  is applied. As shown in  FIG. 12 , the light source apparatus  400  further includes, in addition to the same configuration as the light source apparatus  200 , a packing  70   a  provided between the speaker  30  and the translucent cover  110 . Typically, a rubber such as an O-ring, an adhesive tape, or the like is used as the packing  70   a.    
     When the packing  70   a  is interposed in the structure of closing the second opening portion  11   b  on the side of the speaker  30  in this manner, the gap between the speaker  30  and the translucent cover  110  can be reduced. The light source apparatus  400  can suppress the formation of the gap on a side of a first opening portion  11   a  of the translucent cover  110  by the use of the tapered surface  233  and the abutting surface  111  and suppress the formation of the gap on a side of the opening portion  11   b  by the use of the packing  70   a . With this, it is possible to make the space surrounded with the translucent cover  110  more air-tight. Therefore, an effect of providing the space surrounded with the translucent cover  110  with a speaker box function, to thereby improve the sound quality of the speaker  30  can also be obtained. 
     Other Embodiments 
     The present technology is not limited to the above-mentioned embodiments and other various embodiments can be realized. 
     In each of the above-mentioned embodiments, the light source unit  40  on which the LED elements  45  having a point light emission function are mounted has been exemplified as the light source unit  40 . The light source unit is not limited thereto, and for example, may be an organic or inorganic electro luminescence (EL) element, that is, a light source unit having a surface light emission function or may be a fluorescent lamp such as a cold cathode fluorescent lighting (CCFL) lamp having a three-dimensional light emission function. 
     Further, although the light source unit  40  has a ring shape, the light source unit  40  may have a polygonal shape having three or more sides or a linear shape (one or more linearly formed shapes). In a similar sense, the power source substrate  50  may also be formed in another shape. 
     In each of the above-mentioned embodiments, the metal material is used as the material of the heat sink and the base casing. However, as long as the material has a relatively high thermal conductivity, another material may be used. For example, the material of either one or both of the heat sink and the base casing may be a high dissipation resin or ceramic. 
     In the embodiment shown in  FIG. 10 , the heat sink  230  includes both of the tapered surface  231  (first tapered surface) on the side of the base casing  12  and a tapered surface  233  (second tapered surface) on a side of the translucent cover  110 . However, the heat sink  230  may include only the tapered surface on the side of the translucent cover, which is formed as the second tapered surface, out of them may be provided. In this case, an effect of reducing the backlash at least between the tapered surface of the heat sink and the abutting surface of the translucent cover can be obtained. 
     Fourth Embodiment 
     (Entire Configuration of Electric Light Bulb Type Light Source Apparatus) 
       FIG. 13  is a perspective view showing an electric light bulb type light source apparatus according to an embodiment of the present technology.  FIG. 14  is a partially broken view of the electric light bulb type light source apparatus  500  shown in  FIG. 13 .  FIG. 15  is a schematic cross-sectional view of an electric light bulb type light source apparatus  500 . 
     The light source apparatus  500  includes the supporting unit  20  that supports the speaker  30 . The supporting unit  20  integrally supports the light source unit  40 , the speaker  30 , and the base  15  such that the light source unit  40  is provided between the speaker  30  and the base  15  with the speaker  30  and the light source unit  40  being spaced apart from each other. As shown in  FIG. 15 , typically, the supporting unit  20  includes a heat sink  73 , the holding material  21  that is fixed to the heat sink  73  and holds the speaker  30 , the substrate housing box  22  provided to be opposed to the holding material  21 , and the base casing  12  that forms a part of the casing  10 . 
     (Specific Configuration of Casing) 
     The casing  10  includes, for example, the base casing  12  and a translucent cover  511  provided on the front side of the base casing  12 .  FIG. 16  is a perspective view showing the translucent cover  511 . A first opening  511   a  and a second opening  511   b  are formed in the translucent cover  511 . The first opening  511   a  is provided in an end portion on the rear side and the second opening  511   b  is positioned on the opposite side along the z-axis direction. 
     As shown in  FIGS. 15 and 16 , the translucent cover  511  includes a first end surface  511   c  that forms the first opening  511   a  and a second end surface  511   d  that forms the second opening  511   b . Further, the translucent cover  511  includes a speaker mounting surface  511   e  provided on the inner peripheral side of the second end surface  511   d . Substantially, the speaker mounting surface  511   e  and the second end surface  511   d  form the second opening  511   b . By the frame  31  of the speaker  30  being mounted on the speaker mounting surface  511   e , the second opening  511   b  is closed. A ring-like packing (not shown) may be disposed on the speaker mounting surface  511   e  and the speaker  30  may be disposed on the packing. The ring-like heat sink  73  abuts against the first end surface  511   c  as will be described later. Further, the base casing  12  abuts against the heat sink  73  to close the first opening  511   a . The translucent cover  511  is made of, for example, polycarbonate or acrylic. 
     The base casing  12  is made of a material having a relatively high thermal conductivity, for example, mainly aluminum. As the material of the base casing  12 , another metal material such as copper may be used as long as it is a material having a high thermal conductivity. Alternatively, the material of the base casing  12  may be a high dissipation resin or ceramic. The heat sink  73  and the base casing  12  are thermally connected to each other. The shape of the base casing  12  is a bowl shape. 
       FIG. 17  is a perspective view showing the heat sink  73  of the supporting unit  20 . The heat sink  73  includes a supporting surface  733  that supports the light source unit  40 , a first tapered surface  731 , and a second tapered surface  732 . The supporting surface  733  faces the front side and the first tapered surface  731  and the second tapered surface  732  form a side surface of the heat sink  73 . 
     As shown in  FIGS. 14 and 15 , a tapered surface  121  that forms an opening  12   a  of the base casing  12  is opposed to and abuts against the second tapered surface  732  of the heat sink  73 . In this manner, the heat sink  73  and the base casing  12  are held in contact with each other directly or via a thermal conductive sheet (not shown) or the like, and hence thermal conduction between these members is established. With this, heat generated from the light source unit  40  is efficiently dissipated to the outside via the heat sink  73  and the base casing  12 . 
     The heat sink  73  includes the second tapered surface  732  and the base casing  12  includes the tapered surface  121  that abuts against it. Therefore, the heat sink  73  is stably supported by the base casing  12  and rigidity of them is increased. Further, the tapered surfaces  121  and  732  are provided, and hence the heat sink  73  can be placed in the base casing  12  by lowering the heat sink  73 , and hence it is possible to bring them into close contact with each other without strict dimensional accuracy. With this, it is possible to ensure heat transfer. 
     The first end surface  511   c  of the translucent cover  511  is opposed to and abuts against the first tapered surface  731  of the heat sink  73 . In this case, the first tapered surface  731  functions as an opposed surface. The first end surface  511   c  functions as the abutting surface. 
       FIG. 18  is a view showing a part of each of the heat sink  73  and the translucent cover  511 . The translucent cover  511  has a function of a light guide material and guides incident light from the first end surface  511   c  to the second end surface  511   d . In this case, the first end surface  511   c  functions as the input end surface and the second end surface  511   d  functions as the output end surface. The shape and reflectance of the translucent cover  511  are set such that light inside the translucent cover  511  substantially repeats total reflection from the first end surface  511   c  to the second end surface  511   d.    
     For example, the first end surface  511   c  or the first tapered surface  731  includes a colored region. Typically, an entire peripheral surface of the first end surface  511   c  or an entire peripheral surface of the first tapered surface  731  are colored. With this, the colored light (color light) is incident upon the first end surface  511   c  and emitted from the second end surface  511   d , and hence the region around the frame  31  of the speaker  30  seems to be colored. With this, the outer appearance of the light source apparatus  500  is improved. The color of the colored region may be any color. 
     In general, the cross-section (end surface) of the glass seems to be in blue, blue green, green, or a color close thereto. For example, in the case where the first end surface  511   c  or the first tapered surface  731  is colored in blue, blue green, green, or a color close thereto in this manner, and hence even if the material of the translucent cover  511  is resin, the material, of the translucent cover  511  looks glass. Thus, it is possible to improve the texture of the translucent cover. 
     As the material of the translucent cover  511 , as described above, a resin such as polycarbonate and acrylic is used. The reflectance of the polycarbonate is 1.58 and that of the acrylic is 1.49. If the translucent cover  511  has a shape of the glass portion of the electric light bulb as shown in  FIGS. 13 and 14  and the like and includes, at a top end thereof, an end surface (second end surface  511   d ) that forms an opening (second opening  511   b ), the translucent cover  511  can function as a light guide member. Of course, it is unnecessary to guide entire light from the first end surface  511  to the second end surface  511   d  without omission and a part of the incident light only needs to reach the second end surface  511   d.    
     Further, in this embodiment, the first end surface  511   c  has a taper shape and the heat sink  73  also includes the first tapered surface  731 , and hence the fixing state of the translucent cover  511  and the heat sink  73  becomes stable and the entire rigidity of the translucent cover  511  and the heat sink  73  can be increased. Further, the first end surface  511   c  and the tapered surface  731  have a taper shape, and hence it is possible to reduce the gap between the translucent cover  511  and the heat sink  73  and it is possible to prevent noise (chattering noise), which is caused by the vibration of the speaker  30 , from being generated. 
     In this embodiment, the holding material  21  that holds the speaker  30  is disposed to be surrounded with the light source unit  40 . Thus, it is possible to reduce the arrangement space of the holding material  21  and the light source unit  40  in the electric light bulb type light source apparatus  500  and thus to increase the arrangement density of these members. Therefore, it is possible to downsize the light source apparatus  500  while ensuring a desired light distribution angle. 
     The supporting unit  20  supports the speaker  30  such that the translucent cover  511  is pushed on the heat sink  73  by the speaker  30 . The translucent cover  511  is sandwiched between the speaker  30  and itself (supporting unit  20 ). 
     The heat sink  73  mainly forms the base portion  29  of the supporting unit  20 . The base portion  29  of the supporting unit  20  also includes the flange portion  212  of the holding material  21 . 
     Fifth Embodiment 
       FIG. 19  is a cross-sectional view showing a light source apparatus according to a fifth embodiment of the present technology. 
     Hereinafter, descriptions of the same members, functions, and the like as those of the light source apparatus  500  according to the embodiment shown in  FIG. 13  and the like will be simplified or omitted and different points will be mainly described. 
     A heat sink  83  of a light source apparatus  600  includes a supporting surface  833  that supports the light source unit  40  and a tapered surface  831  that abuts against the base casing  120 . The heat sink  83  is formed in a ring shape around the holding portion  211  as in each of the above-mentioned embodiments. The tapered surface  831  abuts against an inner tapered surface (tapered abutting surface)  123  that forms the opening  12   a  of the base casing  120 . With this, as in the above-mentioned first embodiment, it is possible to increase the rigidity of the heat sink  83  and the base casing  120 . 
     Further, the base casing  120  includes an outer tapered surface  122  formed in an outer periphery of the inner tapered surface  123 . The first end surface  511   c  serving as the input end surface of the translucent cover  511  is opposed to the outer tapered surface  122  of the base casing  120 . In this case, the outer tapered surface  122  functions as the opposed surface. That is, the first end surface  511   c  of the translucent cover  511  or the outer tapered surface  122  of the base casing  120  are colored, and hence the translucent cover  511  can guide the colored light to the second end surface  511   d  and emit it from the second end surface  511   d . The region around the frame  31  of the speaker  30  seems to be colored. With this, the outer appearance of the light source apparatus  600  can be improved. 
     Further, in this embodiment, the first end surface  511   c  has a taper shape and the base casing  120  also includes the outer tapered surface  122 , and hence the fixing state of the translucent cover  511  and the base casing  120  becomes stable and the entire rigidity of the translucent cover  511  and the base casing  120  can be increased. Further, the first end surface  511   c  and the outer tapered surface  122  have a taper shape, and hence it is possible to reduce the gap between the translucent cover  511  and the base casing  120  and it is possible to prevent noise (chattering noise), which is caused by the vibration of the speaker  30 , from being generated. 
     Other Embodiments 
     The present technology is not limited to the above-mentioned embodiment and other various embodiments can be realized. 
     Although the light source unit  40  has a ring shape, the light source unit  40  may have a polygonal shape having three or more sides or a linear shape (one or more linearly formed shapes). In a similar sense, the power source substrate  50  and the heat sink  73  ( 83 ) may also be formed in another shape. 
     As the material of the translucent cover, polycarbonate or acrylic may be replaced by glass. The reflectance of the glass is 1.4 to 1.5. 
     For example, in  FIG. 15 , a packing (not shown) may be disposed between the first end surface  511   c  of the translucent cover  511  and the first tapered surface  731  of the heat sink  73 . In a similar sense, the packing may be provided also in the light source apparatus  600  ( FIG. 19 ) according to the second embodiment. 
     In each of the above-mentioned embodiments, the first end surface  511   c  of the translucent cover  511  has a taper shape. However, the first end surface  511   c  does not need to have a taper shape and may have a plane along an x-direction. In this case, the opposed surfaces of the heat sink  73  and the base casing  120 , which are opposed to the first end surface  511   c , are surfaces along the x-direction. 
     Although the light source apparatus according to each of the above-mentioned embodiments includes the speaker, the light source apparatus may include another device instead of the speaker. The other device is, for example, an image sensor, an optical sensor, an ultrasonic wave sensor, a radiation sensor, or a temperature sensor. 
     The above-mentioned supporting unit  20  includes the heat sinks  73  and  83  as a part of the supporting unit  20 . However, instead of the heat sinks  73  and  83 , another member without the high thermal conductivity function may be provided. 
     At least two features out of the features of each of the above-mentioned embodiments can be combined. 
     Note that the present technology may also employ the following configurations. 
     (1) An electric light bulb type light source apparatus, including: 
     a speaker; 
     a light source unit; 
     a supporting unit that includes a base portion including a tapered surface and a supporting surface that supports the light source unit, and supports the speaker; 
     a casing including an abutting surface against which the tapered surface of the base portion abuts; and 
     a base that is used for supplying a power to the light source unit and the speaker. 
     (2) The electric light bulb type light source apparatus according to (1), in which 
     the supporting unit, the speaker, and the base are arranged such that the base portion is disposed between the speaker and the base, 
     the supporting unit further includes a holding portion that holds the speaker such that the supporting surface of the base portion faces the speaker, and 
     the base portion of the supporting unit is disposed around the holding portion. 
     (3) The electric light bulb type light source apparatus according to (2), in which 
     the tapered surface of the base portion is a surface formed to approach a center of the base portion, at which the holding portion is located, as a distance from the supporting surface increases. 
     (4) The electric light bulb type light source apparatus according to (3), in which 
     the casing includes a base casing including a tapered surface that abuts against the tapered surface of the base portion as the abutting surface. 
     (5) The electric light bulb type light source apparatus according to (3) or (4), in which 
     the supporting unit includes a heat sink that forms at least a part of the base portion, and 
     the casing includes a base casing including the abutting surface, which is thermally connected to the heat sink. 
     (6) The electric light bulb type light source apparatus according to (2), in which 
     the tapered surface of the base portion is a surface formed to be spaced apart from a center of the base portion, at which the holding portion is located, as a distance from the supporting surface increases. 
     (7) The electric light bulb type light source apparatus according to (6), in which 
     the casing includes a translucent cover including a tapered surface that abuts against the tapered surface of the base portion as the abutting surface. 
     (8) The electric light bulb type light source apparatus according to (7), in which 
     the translucent cover includes
         a first opening portion including the tapered surface serving as the abutting surface, and   a second opening portion provided to be closed by the speaker.
 
(9) The electric light bulb type light source apparatus according to (8), further including
       

     a packing provided between the speaker and the translucent cover. 
     (10) The electric light bulb type light source apparatus according to any one of (1) to (9), in which 
     the tapered surface of the supporting unit has a taper angle of 30 degrees or more and 60 degrees or less. 
     (11) The electric light bulb type light source apparatus according to any one of (1) to (10), in which 
     the light source unit includes a light emitting diode (LED) or an electro luminescence (EL) element as a light source element. 
     (12) An electric light bulb type light source apparatus, including: 
     a speaker; 
     a light source unit; 
     a supporting unit that supports the light source unit and the speaker; 
     a casing that includes a base casing including a tapered surface and a translucent cover including an abutting surface that abuts against the tapered surface, and houses the light source unit and the supporting unit; and 
     a base that is used for supplying a power to the light source unit and the speaker. 
     (13) The electric light bulb type light source apparatus according to (12), in which 
     the supporting unit includes
         a holding portion that holds the speaker, and   a base portion that is disposed around the holding portion and supports the light source unit, and       

     the supporting unit, the speaker, and the base are arranged such that the base portion is disposed between the speaker and the base. 
     (14) The electric light bulb type light source apparatus according to (13), in which 
     the base casing includes an opening end surface in which the base portion is placed, and 
     the tapered surface is disposed around the opening end surface and is a surface formed to approach the base along a direction, in which the speaker, the base portion, and the base are arranged, as a distance from the opening end surface increases. 
     (15) The electric light bulb type light source apparatus according to (13) or (14), in which 
     the translucent cover includes a tapered surface that abuts against the tapered surface of the base casing as the abutting surface. 
     (16) An electric light bulb type light source apparatus, including: 
     a speaker; 
     a light source unit; 
     a translucent cover that includes a first opening, an input end surface of light that forms the first opening, a second opening, and an output end surface that forms the second opening and outputs light, and guides light from the input end surface to the output end surface; 
     a supporting unit that includes an opposed surface that is disposed to be opposed to the input end surface and a holding portion that holds the speaker such that the speaker is placed in the second opening, and supports the speaker and the light source unit; and 
     a base that is used for supplying a power to the light source unit and the speaker. 
     (17) The electric light bulb type light source apparatus according to (16), in which 
     the supporting unit includes a heat sink including the opposed surface and a supporting surface that supports the light source unit. 
     (18) The electric light bulb type light source apparatus according to (17), in which 
     the opposed surface is a tapered surface formed in the heat sink. 
     (19) The electric light bulb type light source apparatus according to (17) or (18), in which 
     the heat sink is formed in a ring shape around the holding portion. 
     (20) The electric light bulb type light source apparatus according to (16), in which 
     the supporting unit includes a base casing including the opposed surface. 
     (21) The electric light bulb type light source apparatus according to (20), in which 
     the opposed surface is a tapered surface formed in the base casing. 
     (22) The electric light bulb type light source apparatus according to (20) or (21), in which 
     the supporting unit includes a heat sink formed in a ring shape around the holding portion and supporting the light source unit, and 
     the base casing includes an opening in which the heat sink is placed. 
     (23) The electric light bulb type light source apparatus according to (22), in which 
     the base casing includes a tapered abutting surface that forms an end surface of the opening together with the opposed surface, against which the heat sink abuts. 
     (24) The electric light bulb type light source apparatus according to any one of (16) to (23), in which 
     the input end surface of the translucent cover or the opposed surface of the supporting unit includes a colored region that is colored to reflect color light. 
     (25) An electric light bulb type light source apparatus, including: 
     a sensor; 
     a light source unit; 
     a translucent cover including a first opening, an input end surface of light that forms the first opening, a second opening, and an output end surface that forms the second opening and emits light, and guides the light incident upon the input end surface to the output end surface; 
     a supporting unit that includes an opposed surface that is arranged to be opposed to the input end surface and a holding portion that holds the sensor such that the sensor is placed in the second opening, and supports the sensor and the light source unit; and 
     a base that is used for supplying a power to the light source unit and the sensor. 
     (26) A translucent cover, including: 
     an input end surface that forms a first opening in which an opposed surface provided in a supporting unit that supports a speaker and a light source unit can be placed, upon which light is incident; and 
     an output end surface that forms a second opening in which the speaker supported by the supporting unit can be placed, from which light is emitted, the translucent cover covering the light source unit supported by the supporting unit and guiding the light incident upon the input end surface to the output end surface. 
     (27) A translucent cover, including: 
     an input end surface that forms a first opening in which an opposed surface provided in the supporting unit that supports a sensor and a light source unit can be placed, upon which light is incident; and 
     an output end surface that forms a second opening in which a sensor supported by the supporting unit can be placed, the output end surface having light emitted therefrom, the translucent cover covering the light source unit supported by the supporting unit and guiding the light incident upon the input end surface to the output end surface. 
     DESCRIPTION OF SYMBOLS 
     
         
         
           
               10  casing 
               11 ,  110  translucent cover 
               11   b  second opening portion 
               11   c  first opening portion 
               12 ,  120  base casing 
               12   a  abutting surface (abutting surface, opening end surface) 
               111  abutting surface 
               15  base 
               20  supporting unit 
               21  holding member 
               23 ,  73 ,  83 ,  230  heat sink 
               29  base portion 
               30  speaker 
               40  light source unit 
               45  LED element 
               70   a  packing 
               100 ,  200 ,  300 ,  400 ,  500 ,  600  electric light bulb type light source apparatus 
               121  tapered surface 
               122  outer tapered surface 
               123  inner tapered surface 
               211  holding portion 
               231 ,  233 ,  12   c  tapered surface 
               232  supporting surface 
               511   a  first opening 
               511   b  second opening 
               511   c  first end surface 
               511   d  second end surface 
               731  first tapered surface 
               732  second tapered surface 
               733  supporting surface 
               831  tapered surface 
               833  supporting surface