Projector

Abstract

To provide a projector that can improve a sound quality and a sound pressure by suppressing increase of cost and of steps of assembly.SOLUTION: A projector includes: an external housing 2 as an outside housing; a wall part 733 as a first container contained in the external housing 2; a power source housing 73 as one inner housing having an upper holding unit 731 and a lower holding unit 732 as second containers for containing a functional element; and a speaker 4 contained in the first container, the speaker having a frame 42. The first container has a wall part 733 extending along the frame 42.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a projector.

Background Art

[0002] Conventionally, a projector that modulates and projects a light beam emitted from a light source according to image information incorporates a speaker for outputting sound corresponding to the projected image. For example, in the projector described in Patent Document 1, the speaker is fixed inside the exterior housing that constitutes the projector while being attached to the enclosure. By attaching an enclosure to the speaker, it is possible to prevent the low-frequency sound from the front of the speaker and the low-frequency sound from the back, which are in opposite phases, from canceling each other out, thereby improving the sound quality and sound pressure of the sound output from the projector.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When an enclosure is attached to the speaker to improve the sound quality and sound pressure of the projector, there is a problem that the cost increases due to an increase in the number of parts and the assembly man-hours increase.

Means for Solving the Problems

[0005] A projector according to an aspect of the present application includes an outer housing, one inner housing accommodated in the outer housing and having a first accommodating portion and a second accommodating portion for accommodating functional elements, a speaker accommodated in the first accommodating portion and having a frame, and the first accommodating portion has a wall portion extending along the frame.

[0006] A projector according to one aspect of the present application includes an outer housing, a cooling device housed in the outer housing and having a first housing portion and a refrigerant flow portion through which refrigerant flows inside, and a speaker housed in the first housing portion and having a frame, and the first housing portion has a wall portion extending along the frame.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, in the following respective figures, in order to make each member recognizable in size, the scale of each member is made different from the actual one. In addition, in each figure, the X-axis, Y-axis, and Z-axis are illustrated as three axes orthogonal to each other. Further, hereinafter, the direction parallel to the X-axis is also referred to as the "X-axis direction", the direction parallel to the Y-axis is also referred to as the "Y-axis direction", and the direction parallel to the Z-axis is also referred to as the "Z-axis direction". Also, the tip side of the arrow direction of each axis is also referred to as the "plus side", and the opposite side is also referred to as the "minus side". Further, the plus side in the Z-axis direction is also referred to as "up", and the minus side in the Z-axis direction is also referred to as "down". Also, the plane including the X-axis and the Y-axis is also referred to as the "XY plane", and viewing the XY plane in the Z-axis direction is also referred to as "planar view" or "planar". Also, viewing a cross-section including the Z-axis from a direction perpendicular to the cross-section is also referred to as "cross-sectional view" or "cross-sectional".

[0009] 1. Embodiment 1 1.1. Outline of the projector FIG. 1 is a perspective view showing the appearance of the projector of this embodiment. FIG. 2 is a plan view showing the inside of the projector of FIG. 1. As shown in FIGS. 1 and 2, the projector 1 includes an exterior housing 2 as an outer housing, a light source unit 3, a speaker 4, an optical unit 5 including a projection lens 51, a main board 6, a power supply unit 7, an intake unit 8, and an exhaust unit 9.

[0010] The exterior housing 2 is made of synthetic resin and includes an upper case 21, a lower case 22, etc. as shown in FIG. 1, and these are combined by screws or the like.

[0011] As shown in FIG. 1, the upper case 21 constitutes the upper part of the exterior housing 2 as an outer housing. A plurality of holes 211 are provided on the upper surface 21a of the upper case 21 corresponding to the position where the speaker 4 is arranged. Also, an opening 212 is formed on the upper surface 21a of the upper case 21, and a lever 541 for adjusting the focus of the projection lens 51 is exposed in this opening 212.

[0012] The lower case 22 constitutes the lower part of the exterior housing 2. As shown in Fig. 2, an air intake 221 for taking in outside air is provided on the side surface of the lower case 22 on the minus X side. Also, an exhaust port 222 is provided on the side surface of the exterior housing 2 on the plus X side. Further, legs used when the projector 1 is installed on a desk or the like are provided at the lower part of the lower case 22.

[0013] The main board 6 mounts a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and functions as a control unit, an image signal processing unit, and an audio signal processing unit for controlling the operation of the projector 1.

[0014] The optical unit 5 modulates the light beam from the light source unit 3 by a light modulation device (not shown) under the control of the control unit, and projects it through the projection lens 51. The optical unit 5 includes, as the light modulation device, three liquid crystal light valves corresponding to each of the colors red, green, and blue. The light beam from the light source unit 3 is modulated by the three liquid crystal light valves according to the image signals of each color, and then synthesized, and projected as a full-color video by being enlarged by the projection lens 51. Note that, as the liquid crystal light valve, a transmissive type or a reflective type can be used. Also, the light modulation device may use a DMD (Digital Micromirror Device). Further, the light modulation device is not limited to a three-panel type, and may be a single-panel type.

[0015] 1.2. Outline of the power supply unit

[0016] Next, the configuration of the power supply unit 7 will be described. Fig. 3 is a perspective view showing the power supply unit, and Fig. 4 is an exploded perspective view of the power supply unit. As shown in Fig. 3, the power supply unit 7 includes a power supply circuit board 71 as a functional element, a power supply housing 73 as an inner housing, an electromagnetic shielding plate 74, an air inlet 75, and a speaker 4.

[0017] The power supply unit 7 rectifies the power input through an inlet connector (not shown), converts it into power with various voltage values, and outputs it to the main board 6, the light source unit 3, the intake unit 8, and the exhaust unit 9. As shown in FIG. 4, the power supply circuit board 71 includes circuit elements such as coils, transistors, and diodes mounted on the power supply circuit board 71, and a heat sink and the like.

[0018] The power supply housing 73 is composed of an upper holding portion 731 and a lower holding portion 732 as the second accommodating portion. The power supply circuit board 71 is accommodated in a space 73s formed between the upper holding portion 731 and the lower holding portion 732 by combining the upper holding portion 731 and the lower holding portion 732.

[0019] The upper holding portion 731 includes a wall portion 733 as the first accommodating portion. The upper holding portion 731 is a molded part made of a resin material, and the wall portion 733 is integrally molded on the upper surface 731a of the upper holding portion as a part of the upper holding portion.

[0020] As shown in FIG. 3, the speaker 4 is attached near the opening end 733a of the wall portion 733. The speaker 4 includes a speaker cone 43 and a frame 42 that supports the speaker cone 43 so as to be vibratable. Note that the speaker cone 43 is an output portion that outputs sound waves.

[0021] The inner wall 733b of the wall portion 733 is formed in a shape that surrounds the speaker 4 along the outer edge 42a of the frame 42 of the speaker 4. Therefore, by arranging the speaker 4 near the opening end 733a of the wall portion 733, the opening end 733a side of the wall portion 733 is blocked by the speaker 4, and the space 73e behind the speaker 4 becomes a sealed space.

[0022] By making the space 73e on the back of the speaker 4 an enclosed space, the sound waves from the front of the speaker 4 and the sound waves from the back can be blocked, and it is possible to suppress the cancellation between the low-frequency sound from the front and the low-frequency sound from the back, which are in opposite phases. As a result, the sound pressure of the speaker 4 can be improved. The applicant of the present application was able to confirm an improvement in sound pressure of approximately 3 dB in the projector 1 employing the structure of the wall portion 733 of the present embodiment when the wattage of the speaker 4 was 5W.

[0023] Note that the back of the speaker 4 does not need to be a completely enclosed space. As long as the sound from the front of the speaker 4 and the sound from the back can be blocked and the cancellation between the low-frequency sound from the front and the low-frequency sound from the back, which are in opposite phases, can be suppressed, there may be a gap connecting to the back of the speaker 4 between the speaker 4 and the inner wall 733b of the wall portion 733.

[0024] A notch portion 734 is provided at the open end 733a of the wall portion 733. As shown in FIG. 3, the cable 41 connected to the speaker 4 is drawn out from the power supply housing 73 through the notch portion 734. The cable 41 is connected to the main board 6 and transmits the acoustic electrical signal output from the audio signal processing unit to the speaker 4.

[0025] A sirocco fan (not shown) is arranged at the air inlet 75, and cooling air from the outside of the power supply housing 73 is introduced into the space 73s through the air inlet 75.

[0026] FIG. 5 is a perspective view of the upper holding portion of the power supply housing, and FIG. 6 is a plan view of the upper holding portion of the power supply housing. As shown in FIG. 5, columns 76a and 76b having screw holes for fixing the speaker 4 in the vicinity of the open end 733a are arranged inside the wall portion 733.

[0027] Except for the notch 734 provided at the open end 733a, there are no holes penetrating the wall portion 733. Also, as shown in FIG. 6, no holes penetrating between the space 73e and the space 73s are provided in the upper surface 731a facing the space 73e. Therefore, the space 73e at the back of the speaker 4 can be made into a sealed space, and the wall portion 733 functions as a sealed enclosure for the speaker 4. Note that the surface on the opposite side of the upper holding portion 731 corresponding to the upper surface 731a facing the space 73e faces the space 73s. That is, the upper holding portion 731 has a portion where one side faces the space 73e and the opposite side faces the space 73s.

[0028] As described above, the wall portion 733 is integrally formed with the upper surface 731a of the upper holding portion 731. That is, since the wall portion 733 that functions as an enclosure for the speaker 4 is integrally provided in the upper holding portion 731 that constitutes the power supply housing 73, an increase in the number of parts can be suppressed, and an increase in cost due to an increase in the number of parts can also be suppressed.

[0029] FIG. 7 is a cross-sectional view taken along line B - B of FIG. 1. The speaker 4 is housed in the wall portion 733 of the power supply housing 73 and is arranged at a position in the exterior housing 2 where a speaker hole 211 is provided. An elastic member 11 is disposed between the open end 733a of the wall portion 733 and the inner surface 21b of the upper case 21. The elastic member 11 suppresses the sound wave of the speaker 4 from leaking into the exterior housing 2 through the gap between the wall portion 733 and the inner surface 21b of the upper case 21 and generating rattling noise in other components in the exterior housing 2. Also, the vibration of the speaker cone 43 is transmitted to the wall portion 733 via the frame 42, and rattling noise is suppressed by preventing the portion of the open end 733a that touches the upper case 21 from rubbing.

[0030] In this way, by arranging the elastic member 11, the generation of rattling noise can be suppressed. Therefore, the projector 1 of the present embodiment can improve the tonality. The applicant of the present application was able to confirm that the tonality of the projector 1 adopting the elastic member 11 of the present embodiment was improved from 0.9 to 0.95.

[0031] An extending portion 733c is formed on the inner wall 733b of the wall portion 733. The extending portion 733c is arranged to surround one round along the outer edge 42a of the frame 42 of the speaker 4 and fill the gap between the outer edge 42a of the frame 42 and the inner wall 733b of the wall portion 733.

[0032] By providing the extending portion 733c, the sealing degree of the space 73e at the back of the speaker 4 can be increased. Therefore, the sound pressure of the speaker 4 can be further improved. Note that the extending portion 733c is not an essential configuration. In order to make the space 73e at the back of the speaker 4 a space with a desired sealing degree, configurations other than the extending portion 733c can be adopted. Also, if the space 73e at the back of the speaker 4 can be made to have a desired sealing degree with only the configuration of the wall portion 733, it is not necessary to provide the extending portion 733c.

[0033] As described above, according to the projector 1 of the present embodiment, the following effects can be obtained. The projector 1 of the present embodiment includes an exterior housing 2 as an outer housing, a power supply housing 73 as one inner housing that is housed in the exterior housing 2 and has a wall portion 733 as a first housing portion and an upper holding portion 731 and a lower holding portion 732 as second housing portions for housing functional elements, and a speaker 4 that is housed in the first housing portion and has a frame 42. The first housing portion has a wall portion 733 that extends along the frame 42.

[0034] According to this configuration, since the power supply housing 73 is provided with the wall portion 733 that functions as the enclosure of the speaker 4, it is possible to suppress the sound waves emitted from the back surface of the speaker 4 from leaking to the front side of the speaker 4. Therefore, the sound pressure of the sound output from the speaker 4 of the projector 1 can be improved.

[0035] Also, the wall portion 733 that functions as the enclosure of the speaker 4 is integrally formed with the upper holding portion 731 of the power supply housing 73. Furthermore, the upper holding portion 731 facing the space 73e on the back surface of the speaker 4 is also the upper holding portion 731 that functions as the second accommodating portion for accommodating the power circuit board 71. Therefore, in order to seal the space 73e on the back surface of the speaker 4, no dedicated member is required, and an increase in parts and cost can be suppressed.

[0036] The projector 1 of the present embodiment further includes an outer housing 2 having an inner surface 21b facing the wall portion 733, and an elastic member 11 provided between the opening end 733a of the wall portion 733 and the inner surface 21b. According to this configuration, it is possible to suppress the sound waves of the speaker 4 from leaking into the outer housing 2 through the gap between the wall portion 733 and the outer housing 2 and generating rattling noise in other components provided inside the outer housing 2.

[0037] The projector 1 of the present embodiment further includes a speaker 4 having a cable 41 for transmitting an electrical signal, the wall portion 733 having a notch portion 734 as a notch at the opening end 733a, and the cable 41 being drawn out from the wall portion 733 through the notch portion 734. According to this configuration, while suppressing sound leakage from the wall portion 733, the cable 41 can be drawn out to the outside of the wall portion 733.

[0038] The projector 1 of the present embodiment further includes a wall portion 733 having a space 73e as a sealed space on the back surface of the speaker 4. According to this configuration, it is possible to effectively suppress the sound waves of the opposite phase output from the back surface of the speaker 4 from leaking to the front side of the speaker 4. Therefore, the sound pressure of the speaker 4 can be improved.

[0039] In the projector 1 of the present embodiment, further, the functional element is the power supply unit 7, and the inner housing is the power supply housing 73 as the housing for the power supply unit. According to this configuration, since the power supply unit 7 does not accommodate the optical unit 5 for image formation, it is possible to suppress the occurrence of image distortion in the optical unit 5 due to the sound waves of the speaker 4.

[0040] In the projector 1 of the present embodiment, further, the wall portion 733 is provided between the upper holding portion 731 and the inner surface 21b of the upper case 21. According to this configuration, since the wall portion 733 can be arranged using the narrow space between the power supply housing 73 and the upper case 21, it is possible to suppress an increase in the size of the exterior housing 2. Further, by arranging the wall portion 733, the dead space inside the exterior housing 2 can be reduced, and the usage efficiency of the internal space of the exterior housing 2 can be improved.

[0041] 2. Embodiment 2 2.1. Outline of the Projector In Embodiment 2, an example in which the enclosure is formed as a duct will be described. FIG. 8 is a perspective view showing the appearance of the projector of Embodiment 2. FIG. 9 is a plan view showing the inside of the projector of FIG. 8. As shown in FIGS. 8 and 9, the projector 1000 includes an exterior housing 1002 as an outer housing, a light source unit 1003, a speaker 1004, an optical unit 1005 having a projection window 1051, a power supply unit 1007, an intake unit 1008, and an exhaust unit 1009 as a cooling device.

[0042] The exterior housing 1002 is made of synthetic resin and, as shown in FIG. 8, includes an upper case 1021, a lower case 1022, etc., which are combined by screws or the like.

[0043] As shown in FIG. 8, the upper case 1021 constitutes the upper part of the exterior housing 1002. A plurality of holes 1211 are provided on the upper surface 1021a of the upper case 1021 corresponding to the positions where the speakers 1004 are arranged. Further, a projection window 1051 is provided on the upper surface 1021a of the upper case 1021, and the video output from the optical unit 1005 is projected from this projection window 1051. The video projected from the projection window 1051 is output in the rear direction on the minus Y side of the projector 1000. Further, an air intake port 1221 for taking in outside air is provided on the side surface on the minus X side of the upper case 1021. Further, an exhaust port 1222 is provided on the side surface on the plus X side of the exterior housing 1002.

[0044] The lower case 1022 constitutes the lower part of the exterior housing 1002. Further, on the lower part of the lower case 1022, there are provided legs and fixing parts for ceiling suspension brackets used when installing the projector 1000 against a wall or on the ceiling.

[0045] The optical unit 1005 projects the light beam from the light source unit 1003 and the light beam emitted through a light modulation device (not shown) under the control of a control unit (not shown). The light modulation device is a three-panel liquid crystal light valve. Note that, as in the first embodiment, a DMD or a single-panel device may be adopted as the light modulation device.

[0046] As shown in FIG. 9, the speaker 1004 is attached near the opening end 1933a of the wall portion 1933. The speaker 1004 includes a speaker cone 1043 and a frame 1042 that supports the speaker cone 1043 so as to be vibratable. In the present embodiment, the speaker 1004 is housed in the wall portion 1933 provided in the duct 1091 of the exhaust unit 1009. The frame 1042 of the speaker 1004 has a substantially square shape in a plan view, and the shape of the wall portion 1933 is also formed in the same substantially square shape as the frame 1042.

[0047] 2.2. Outline of Duct Next, the configuration of the duct used in the exhaust unit 1009 as a cooling device will be described. FIG. 10 is a perspective view showing the duct, and FIG. 11 is a plan view of the duct. As shown in FIG. 10, the duct 1091 as a refrigerant flow portion has a pipe structure for allowing a refrigerant as a functional element to flow therethrough. In the present embodiment, the refrigerant is air used for cooling. The refrigerant passing through the duct 1091 is discharged to the outside from the exhaust port 1222 through the air discharge port 1975.

[0048] The duct 1091 includes a wall portion 1933 as a first housing portion. The duct 1091 is a molded part made of a resin material, and the wall portion 1933 is integrally molded as a part of the upper surface 1091a of the duct 1091.

[0049] At each corner inside the wall portion 1933, a pillar 1976 for screwing the speaker 1004 near the opening end 1933a of the wall portion 1933 is provided. A notch portion 1934 is provided at the opening end 1933a of the wall portion 1933. Similar to Embodiment 1, a cable (not shown) is passed through the notch portion 1934, and an acoustic electrical signal is transmitted to the speaker 1004 via the cable.

[0050] The inner wall 1933b of the wall portion 1933 is formed in a shape that goes around the speaker 1004 once along the outer edge of the frame 1042 of the speaker 1004. Therefore, by arranging the speaker 1004 near the opening end 1933a of the wall portion 1933, the opening end 1933a side of the wall portion 1933 can be blocked by the speaker 1004, and the space 1093e at the back of the speaker 1004 can be made into a sealed space.

[0051] By making the space 1093e at the back of the speaker 1004 a sealed space, the sound waves from the front of the speaker 1004 and the sound waves from the back can be blocked, and it is possible to suppress the cancellation of the low-frequency sound from the front and the low-frequency sound from the back, which are in opposite phases. As a result, the sound pressure of the speaker 1004 can be improved. Note that the space 1093e at the back of the speaker 1004 does not necessarily have to be a completely sealed space as in Embodiment 1.

[0052] As shown in FIG. 9, the wall portion 1933 is not provided with holes that penetrate the wall portion 1933, except for the notch portion 1934 provided at the opening end 1933a. Also, as shown in FIG. 10, the upper surface 1091a facing the space 1093e is not provided with holes that penetrate between the space 1093e and the space 1093s. Therefore, the space 1093e at the back of the speaker 1004 can be made into a sealed space by the wall portion 1933 and the upper surface 1091a of the duct 1091. That is, the wall portion 1933 provided in the duct 1091 can be made to function as a sealed enclosure for the speaker 1004. Note that the opposite side of the duct 1091 corresponding to the upper surface 1091a facing the space 1093e faces the inner space 1093s of the duct. That is, the duct 1091 has a portion where one side faces the space 1093e and the opposite side faces the space 1093s.

[0053] As described above, the wall portion 1933 is integrally formed with the upper surface 1091a of the duct 1091. That is, since the wall portion 1933 that functions as the enclosure of the speaker 1004 is provided integrally with the duct 1091, an increase in the number of components can be suppressed, and an increase in cost due to an increase in the number of components can also be suppressed.

[0054] As shown in FIGS. 9 and 10, the speaker 1004 is housed in the wall portion 1933 of the duct 1091 and is disposed at a position where the speaker hole 1211 is provided in the exterior housing 1002.

[0055] Although not shown, an elastic member is disposed between the open end 1933a of the wall portion 1933 and the inner surface of the upper case 1021, as in the first embodiment. By disposing the elastic member in this way, the tonality can be improved as in the first embodiment.

[0056] Further, an extension portion may be formed on the inner wall 1933b of the wall portion 1933, as in the first embodiment. By providing the extension portion, the degree of sealing of the space 1093e at the back of the speaker 1004 can be increased as in the first embodiment, so that the sound pressure of the speaker 1004 can be further improved.

[0057] In this embodiment, the wall portion 1933 is formed in the duct 1091 used for the exhaust unit 1009, but the wall portion 1933 may be provided in the duct used for the intake unit 1008 to function as the enclosure of the speaker 1004. Further, the wall portion 1933 may be provided in other ducts disposed inside the exterior housing 1002.

[0058] As described above, according to the projector 1000 of the present embodiment, in addition to the effects of the first embodiment, the following effects can be obtained. The projector 1000 of this embodiment includes an exterior housing 1002 as an outer housing, an exhaust unit 1009 as a cooling device that is housed in the exterior housing 1002 and has a wall portion 1933 as a first housing portion and a duct 1091 as a refrigerant flow portion through which refrigerant flows inside, and a speaker 1004 that is housed in the wall portion 1933 and has a frame 1042. The first housing portion has a wall portion 1933 that extends along the frame 1042.

[0059] According to this configuration, since the wall portion 1933 that functions as an enclosure for the speaker 1004 is provided in the duct 1091, it is possible to suppress the leakage of sound waves emitted from the back surface of the speaker 1004 to the front side of the speaker 1004, so that the sound pressure can be improved.

[0060] Also, since the wall portion 1933 that functions as an enclosure for the speaker 1004 is integrally formed with the duct 1091, a dedicated member is not required to seal the space 1093e at the back of the speaker 1004, and an increase in parts and cost can be suppressed.

[0061] Moreover, since the duct 1091 does not house the optical unit 1005 for image formation, it is possible to suppress the occurrence of image distortion in the optical unit 1005 due to the sound waves of the speaker 1004.

Description of Reference Numerals

[0062] 1... Projector, 2... Exterior housing, 21... Upper case, 21a... Upper surface, 21b... Inner surface, 22... Lower case, 211... Hole, 212... Opening, 221... Air inlet, 222... Exhaust port, 3... Light source unit, 4... Speaker, 41... Cable, 42... Frame, 42a... Outer edge, 43... Speaker cone, 5... Optical unit, 51... Projection lens, 541... Lever, 6... Main board, 7... Power supply unit, 71... Power supply circuit board, 73... Power supply housing, 73e... Space, 73s... Space, 74... Electromagnetic shielding plate, 75... Air inlet, 76a... Column, 731... Upper holding part, 731a... Upper surface, 732... Lower holding part, 733... Wall part, 733a... Open end, 733b... Inner wall, 733c... Extension part, 734... Notch part, 8... Air intake unit, 9... Exhaust unit, 11... Elastic member, 1000... Projector, 1002... Exterior housing, 1021... Upper case, 1021a... Upper surface, 1211... Hole, 1221... Air inlet, 1222... Exhaust port, 1022... Lower case, 1003... Light source unit, 1004... Speaker, 1042... Frame, 1005... Optical unit, 1051... Projection window, 1007... Power supply unit, 1008... Air intake unit, 1009... Exhaust unit, 1091... Duct, 1091a... Upper surface, 1093e... Space, 1093s... Space, 1933... Wall part, 1933a... Open end, 1933b... Inner wall, 1934... Notch part, 1975... Air exhaust port.

Claims

1. An outer housing, One inner housing accommodated in the outer housing and having a first accommodating portion and a second accommodating portion for accommodating functional elements, A speaker accommodated in the first accommodating portion and having a frame, and having, The first accommodating portion has a wall portion extending along the frame, The outer housing has an inner surface facing the first accommodating portion, And an elastic member provided between an open end of the wall portion of the first accommodating portion and the inner surface. A projector.

2. The speaker has a cable for transmitting an electrical signal, The first accommodating portion has a notch at the open end, The cable is drawn out from the first accommodating portion through the notch, The projector according to Claim 1.

3. The first accommodating portion has a sealed space at the back of the speaker, The projector according to any one of Claims 1 or 2.

4. The functional element is a power supply unit, The inner housing is a housing for the power supply unit, The projector according to any one of Claims 1 to 3.

5. The first accommodating portion is provided between the second accommodating portion and the outer housing, The projector according to Claim 4.

6. An outer housing, One inner housing accommodated in the outer housing and having a first accommodating portion and a second accommodating portion for accommodating functional elements, A speaker accommodated in the first accommodating portion and having a frame, and having, The first accommodating portion has a wall portion extending along the frame, The functional element is a power supply unit, The inner housing is a housing for the power supply unit, A projector.

7. The first accommodating portion is provided between the second accommodating portion and the outer housing, The projector according to Claim 6. ​ ​ ​

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