projector

Abstract

The present application provides a projector capable of suppressing cost increase, assembly man-hour increase, and improving sound quality and sound pressure. The projector has: an outer casing (2) as an outer casing body; one power supply casing (73) as an inner casing body, which is housed in the outer casing (2), has a wall portion (733) as a first housing portion, and has an upper holding portion (731) and a lower holding portion (732) as second housing portions for housing functional elements; and a speaker (4) housed in the first housing portion and having a frame (42), the first housing portion having the wall portion (733) extending along the frame (42).

Description

Technical Field

[0001] This invention relates to projectors. Background Technology

[0002] Conventional projectors, which modulate and project light beams emitted from a light source based on image information, have built-in speakers for outputting sound corresponding to the projected image. For example, in the projector described in Patent Document 1, the speaker is fixed inside the outer casing that constitutes the projector, with the speaker mounted in an enclosure.

[0003] By installing a cover on the speaker, it is possible to prevent low-frequency sounds from the front surface of the speaker, which are out of phase with each other, from canceling out low-frequency sounds from the back, thus improving the sound quality and sound pressure level of the sound output from the projector.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2008-139770

[0005] When an enclosure is installed on the speaker to improve the sound quality and sound pressure level of the projector, there are issues such as increased costs and assembly time due to the increased number of components. Summary of the Invention

[0006] One aspect of the projector of this application includes: a housing; an inner housing housed within the housing, having a first storage portion and a second storage portion for storing functional elements; and a speaker housed within the first storage portion, having a frame, the first storage portion having a wall extending along the frame.

[0007] One aspect of the projector of this application includes: a housing; a cooling device housed in the housing, having a first receiving portion and a refrigerant flow portion for refrigerant to flow within; and a speaker housed in the first receiving portion, having a frame, the first receiving portion having a wall extending along the frame. Attached Figure Description

[0008] Figure 1 This is a perspective view showing the appearance of the projector according to Embodiment 1.

[0009] Figure 2 It means Figure 1 A top view of the inside of the projector.

[0010] Figure 3 This is a perspective view of the power supply unit according to Embodiment 1.

[0011] Figure 4 This is an exploded 3D view of the power supply unit.

[0012] Figure 5This is a perspective view of the upper retaining part of the power supply housing.

[0013] Figure 6 This is a top view of the upper retaining part of the power supply housing.

[0014] Figure 7 yes Figure 1 BB line section view.

[0015] Figure 8 This is a perspective view showing the appearance of the projector according to Embodiment 2.

[0016] Figure 9 It means Figure 8 A top view of the inside of the projector.

[0017] Figure 10 It is a 3D diagram of the pipeline.

[0018] Figure 11 This is a top view of the pipe.

[0019] Label Explanation

[0020] 1: Projector; 2: Outer housing; 21: Upper housing; 21a: Upper surface; 21b: Inner surface; 22: Lower housing; 211: Hole; 212: Opening; 221: Air inlet; 222: Exhaust outlet; 3: Light source unit; 4: Speaker; 41: Cable; 42: Frame; 42a: Outer edge; 43: Speaker cone; 5: Optical unit; 51: Projection lens; 541: Rod; 6: Main board; 7: Power supply unit; 71: Power 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; 733a: Opening end; 733b: Inner wall; 733c: Extension 734: Expansion section; 8: Air intake unit; 9: Exhaust unit; 11: Elastic component; 1000: Projector; 1002: Outer housing; 1021: Upper housing; 1021a: Upper surface; 1211: Hole; 1221: Air inlet; 1222: Exhaust outlet; 1022: Lower housing; 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: Pipe; 1091a: Upper surface; 1093e: Space; 1093s: Space; 1933: Wall; 1933a: Opening end; 1933b: Inner wall; 1934: Expansion section; 1975: Air exhaust outlet. Detailed Implementation

[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0022] Here, in the following figures, the dimensions of each component are made different from their actual size in order to make each component identifiable.

[0023] In addition, the X-axis, Y-axis, and Z-axis are illustrated in each figure as three mutually perpendicular axes. Hereinafter, the direction parallel to the X-axis will be referred to as the "X-axis direction," the direction parallel to the Y-axis will be referred to as the "Y-axis direction," and the direction parallel to the Z-axis will be referred to as the "Z-axis direction." Furthermore, the end of the arrow pointing towards each axis will be referred to as the "positive side," and the opposite side will be referred to as the "negative side." The positive side of the Z-axis direction will be referred to as "top," and the negative side of the Z-axis direction will be referred to as "bottom." The plane containing the X-axis and Y-axis will be referred to as the "XY plane," and the view of the XY plane along the Z-axis direction will be referred to as a "top view" or "plane." The view from a direction perpendicular to the section containing the Z-axis will be referred to as a "section view" or "section."

[0024] 1. Implementation Method 1

[0025] 1.1. Overview of Projectors

[0026] Figure 1 This is a perspective view showing the appearance of the projector according to this embodiment. Figure 2 It means Figure 1 A top view of the inside of the projector.

[0027] like Figure 1 and Figure 2 As shown, the projector 1 has an outer casing 2 as the outer shell, 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 air intake unit 8, and an exhaust unit 9.

[0028] The outer casing 2 is made of synthetic resin, such as Figure 1 As shown, it has an upper housing 21, a lower housing 22, etc., which are assembled by screws or the like.

[0029] like Figure 1 As shown, the upper housing 21 constitutes the upper part of the outer housing 2, which serves as the outer shell. On the upper surface 21a of the upper housing 21, a plurality of holes 211 are provided corresponding to the positions where the speaker 4 is disposed. In addition, an opening 212 is formed on the upper surface 21a of the upper housing 21, through which the rod 541 for adjusting the focus of the projection lens 51 is exposed.

[0030] The lower housing 22 constitutes the lower part of the outer housing 2. For example... Figure 2As shown, an air inlet 221 for drawing in outside air is provided on the negative X-side of the lower housing 22. Additionally, an exhaust port 222 is provided on the positive X-side of the outer housing 2. Furthermore, legs for use when the projector 1 is mounted on a table, etc., are provided at the lower part of the lower housing 22.

[0031] The main board 6 is equipped with a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc., and functions as a control unit, image signal processing unit, and sound signal processing unit for controlling the operation of the projector 1.

[0032] Under the control of the control unit, the optical unit 5 modulates the light beam from the light source unit 3 using a light modulation device (not shown), and projects it through the projection lens 51. The optical unit 5 has three liquid crystal light valves corresponding to red, green, and blue as light modulation devices. 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, thereby being magnified and projected as a full-color image by the projection lens 51. Furthermore, transmissive or reflective liquid crystal light valves can be used as the light valves. Additionally, the light modulation device can also be a DMD (Digital Micromirror Device). Furthermore, the light modulation device is not limited to a three-panel type; a single-panel type can also be used.

[0033] 1.2. Overview of the Power Supply Unit

[0034] Next, the structure of power supply unit 7 will be explained.

[0035] Figure 3 It is a 3D diagram showing the power supply unit. Figure 4 This is an exploded 3D view of the power supply unit.

[0036] like Figure 3 As shown, the power supply unit 7 includes a power 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.

[0037] The power supply unit 7 rectifies the power input via the inlet connector (not shown), converts it into power of various voltage values, and outputs it to the main board 6, the light source unit 3, the air intake unit 8, and the exhaust unit 9.

[0038] like Figure 4 As shown, the power supply circuit board 71 has circuit elements such as coils, transistors, and diodes, as well as heat sinks, mounted on the power supply circuit board 71.

[0039] The power supply housing 73 is composed of an upper holding portion 731 and a lower holding portion 732, which serve as the second storage portion. The power supply circuit board 71 is stored in the 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.

[0040] The upper holding part 731 has a wall part 733 that serves as a first storage part. The upper holding part 731 is a molded part made of resin material, and the wall part 733 is integrally molded on the upper surface 731a of the upper holding part as part of the upper holding part 731.

[0041] like Figure 3 As shown, the loudspeaker 4 is mounted near the opening end 733a of the wall portion 733. The loudspeaker 4 has a loudspeaker cone 43 and a frame 42 that supports the loudspeaker cone 43 so that it can vibrate. Furthermore, the loudspeaker cone 43 is the output part that outputs sound waves.

[0042] The wall portion 733 is formed such that the inner wall 733b of the wall portion 733 surrounds the speaker 4 around the outer edge 42a of the frame 42 of the speaker 4. Therefore, by placing the speaker 4 near the opening end 733a of the wall portion 733, the opening end 733a side of the wall portion 733 is closed by the speaker 4, and the space 73e on the back of the speaker 4 becomes a sealed space.

[0043] By making the space 73e at the rear of the speaker 4 a sealed space, sound waves from the front surface of the speaker 4 can be isolated from sound waves from the rear surface, thereby suppressing the situation where low-frequency sounds from the front surface and low-frequency sounds from the rear surface, which are out of phase with each other, cancel each other out. This increases the sound pressure level of the speaker 4. In a projector 1 employing the wall portion 733 structure of this embodiment, the applicant confirmed an increase in sound pressure level of approximately 3 dB when the wattage of the speaker 4 was 5 W.

[0044] Furthermore, the back of the speaker 4 does not need to be a completely sealed space. As long as the sound from the front surface of the speaker 4 and the sound from the back can be isolated, thereby suppressing the low-frequency sound from the front surface and the low-frequency sound from the back that are out of phase with each other to cancel each other out, a gap connecting the back of the speaker 4 to the inner wall 733b of the wall portion 733 is also acceptable.

[0045] A notch 734 is provided at the opening end 733a of the wall portion 733. For example... Figure 3 As shown, a cable 41, which is connected to the speaker 4, is led out from the power supply housing 73 via the notch 734. The cable 41 is connected to the main board 6 and transmits the acoustic signal output from the sound signal processing unit to the speaker 4.

[0046] A Sirocco fan (not shown) is provided at the air inlet 75, through which cooling air is introduced into the space 73s from the outside of the power supply housing 73 via the air inlet 75.

[0047] Figure 5 This is a perspective view of the upper retaining part of the power supply housing. Figure 6 This is a top view of the upper retaining part of the power supply housing.

[0048] like Figure 5 As shown, on the inner side of the wall portion 733, there are posts 76a and 76b with threaded holes for fixing the speaker 4 near the opening end 733a.

[0049] In the wall portion 733, apart from the notch 734 provided at the opening end 733a, no hole is provided penetrating the wall portion 733. Additionally, as... Figure 6 As shown, no hole is provided on the upper surface 731a facing the space 73e to pass through the space 73e and the space 73s. Therefore, the space 73e on the back of the speaker 4 can be made into a sealed space, and the wall portion 733 functions as a sealed outer cover for the speaker 4. In addition, the side opposite to the upper surface 731a facing the space 73e faces the space 73s. That is, the upper holding portion 731 has a portion with one side facing the space 73e and the opposite side facing the space 73s.

[0050] As described above, the wall portion 733 is integrally formed with the upper holding portion 731 on the upper surface 731a of the upper holding portion 731. That is, since the wall portion 733, which functions as the outer cover of the speaker 4, is integrally provided in the upper holding portion 731 that constitutes the power supply housing 73, it is possible to suppress the increase in the number of parts and also to suppress the increase in cost caused by the increase in the number of parts.

[0051] Figure 7 yes Figure 1 BB line section view.

[0052] The speaker 4 is housed in the wall 733 of the power supply housing 73 and is positioned in the outer housing 2 at the location where the speaker hole 211 is provided.

[0053] An elastic member 11 is disposed between the opening end 733a of the wall portion 733 and the inner surface 21b of the upper housing 21. The elastic member 11 suppresses the leakage of sound waves from the speaker 4 through the gap between the wall portion 733 and the inner surface 21b of the upper housing 21 into the outer housing 2, thereby preventing vibration noise from occurring in other components within the outer housing 2. Furthermore, it suppresses vibration noise caused by friction in the portion of the opening end 733a that contacts the upper housing 21 due to the vibration of the speaker cone 43 transmitted through the frame 42 to the wall portion 733.

[0054] Thus, by configuring the elastic member 11, the generation of flutter noise can be suppressed, and therefore the projector 1 of this embodiment can improve tonality. The applicant of this application can confirm that in the projector 1 using the elastic member 11 of this embodiment, the tonality is improved from 0.9 to 0.95.

[0055] An extension 733c is formed on the inner wall 733b of the wall portion 733. The extension 733c is configured to fill the gap between the outer edge 42a of the frame 42 and the inner wall 733b of the wall portion 733 when it surrounds the outer edge 42a of the frame 42 of the speaker 4 once.

[0056] By providing the extension 733c, the airtightness of the space 73e at the back of the speaker 4 can be improved. Therefore, the sound pressure level of the speaker 4 can be further increased.

[0057] Furthermore, the extension 733c is not a necessary structure. A structure other than the extension 733c can be used to make the space 73e at the rear of the speaker 4 achieve the desired sealing. Additionally, if the space 73e at the rear of the speaker 4 can achieve the desired sealing using only the structure of the wall portion 733, then the extension 733c is unnecessary.

[0058] As described above, the projector 1 according to this embodiment can achieve the following effects.

[0059] The projector 1 of this embodiment includes: an outer casing 2 as an outer shell; a power supply casing 73 as an inner casing, which is housed in the outer casing 2 and has a wall portion 733 as a first storage portion, an upper holding portion 731 and a lower holding portion 732 as storage functional elements of a second storage portion; and a speaker 4, which is housed in the first storage portion and has a frame 42, the first storage portion having a wall portion 733 extending along the frame 42.

[0060] According to this structure, the power supply housing 73 is provided with a wall portion 733 that functions as an outer cover for the speaker 4, thereby suppressing the leakage of sound waves emitted from the back of the speaker 4 to the front surface of the speaker 4. Therefore, the sound pressure level of the sound output from the speaker 4 of the projector 1 can be increased.

[0061] Furthermore, the wall portion 733, which functions as the outer casing of the speaker 4, is integrally formed with the upper holding portion 731 of the power supply housing 73. Additionally, the upper holding portion 731 of the space 73e facing the rear of the speaker 4 also functions as a second holding portion for housing the power circuit board 71. Therefore, it is not necessary to provide a dedicated component for sealing the space 73e at the rear of the speaker 4, thus reducing the need for additional components and lowering costs.

[0062] The projector 1 of this embodiment has an outer housing 2 that also has an inner surface 21b opposite to the wall portion 733, and the projector 1 has an elastic member 11 disposed between the opening end 733a of the wall portion 733 and the inner surface 21b.

[0063] According to this structure, it is possible to suppress the situation where the sound waves of the speaker 4 leak into the outer housing 2 through the gap between the wall 733 and the outer housing 2, thereby preventing the vibration noise generated in other components located on the inner side of the outer housing 2.

[0064] The speaker 4 in the projector 1 of this embodiment also has a cable 41 for transmitting electrical signals, and the wall portion 733 has a notch 734 at the opening end 733a, through which the cable 41 is led out from the wall portion 733.

[0065] According to this structure, sound leakage from the wall portion 733 can be suppressed, and the cable 41 can be led out to the outside of the wall portion 733.

[0066] In this embodiment, the wall portion 733 of the projector 1 also has a space 73e as a sealed space on the back of the speaker 4.

[0067] According to this structure, sound leakage from the back of the speaker 4 to the front surface of the speaker 4 can be effectively suppressed. Therefore, the sound pressure level of the speaker 4 can be increased.

[0068] In the projector 1 of this embodiment, the functional element is a power supply unit 7, and the inner housing is a power supply housing 73 that serves as the housing for the power supply unit.

[0069] According to this structure, the power supply unit 7 does not house the optical unit 5 for image formation, thus suppressing the distortion of the image in the optical unit 5 caused by the sound waves from the speaker 4.

[0070] In this embodiment, the projector 1 also has a wall portion 733 disposed between the upper retaining portion 731 and the inner surface 21b of the upper housing 21.

[0071] According to this structure, the wall portion 733 can be configured in the narrow space between the power supply housing 73 and the upper housing 21, thus suppressing the increase in the size of the outer housing 2. In addition, by configuring the wall portion 733, the unused space inside the outer housing 2 can be reduced, thereby improving the utilization efficiency of the internal space of the outer housing 2.

[0072] 2. Implementation Method 2

[0073] 2.1. Overview of Projectors

[0074] In Embodiment 2, an example of forming an outer cover on a pipe will be described.

[0075] Figure 8 This is a perspective view showing the appearance of the projector according to Embodiment 2. Figure 9 It means Figure 8 A top view of the inside of the projector.

[0076] like Figure 8 and Figure 9 As shown, the projector 1000 has an outer casing 1002 as the outer shell, a light source unit 1003, a speaker 1004, an optical unit 1005 with a projection window 1051, a power supply unit 1007, an air intake unit 1008, and an exhaust unit 1009 as a cooling device.

[0077] The outer casing 1002 is made of synthetic resin, such as Figure 8 As shown, it has an upper housing 1021, a lower housing 1022, etc., which are assembled by screws, etc.

[0078] like Figure 8 As shown, the upper housing 1021 constitutes the upper part of the outer housing 1002. On the upper surface 1021a of the upper housing 1021, a plurality of holes 1211 are provided corresponding to the positions where the speaker 1004 is disposed. Furthermore, a projection window 1051 is provided on the upper surface 1021a of the upper housing 1021, through which an image output from the optical unit 1005 is projected. The image projected from the projection window 1051 is output in the rear direction, which is the negative Y side of the projector 1000. Additionally, an air inlet 1221 for drawing in external air is provided on the negative X side of the upper housing 1021. Furthermore, an exhaust port 1222 is provided on the positive X side of the outer housing 1002.

[0079] The lower housing 1022 constitutes the lower part of the outer housing 1002. In addition, the lower part of the lower housing 1022 is provided with a leg and ceiling hanging accessory fixing part for use when the projector 1000 is installed on a wall, ceiling, etc.

[0080] Under the control of a control unit (not shown), the optical unit 1005 projects a light beam emitted from the light source unit 1003 via a light modulation device (not shown). The light modulation device is a three-panel liquid crystal light valve. Alternatively, a DMD or a single-panel light modulation device can be used as the light modulation device, similar to that in Embodiment 1.

[0081] like Figure 9As shown, the loudspeaker 1004 is mounted near the opening end 1933a of the wall portion 1933. The loudspeaker 1004 has a loudspeaker cone 1043 and a frame 1042 that supports the loudspeaker cone 1043 so that it can vibrate. In this embodiment, the loudspeaker 1004 is housed in the wall portion 1933 provided in the duct 1091 of the exhaust unit 1009. The frame 1042 of the loudspeaker 1004 is generally quadrilateral in shape when viewed from above, and the wall portion 1933 is also formed in the same generally quadrilateral shape as the frame 1042.

[0082] 2.2. Piping Overview

[0083] Next, the structure of the pipes used in the exhaust unit 1009, which is a cooling device, will be described.

[0084] Figure 10 It is a 3D diagram representing a pipeline. Figure 11 This is a top view of the pipe.

[0085] like Figure 10 As shown, the pipe 1091, which serves as the refrigerant flow section, has a pipe structure that functions as a refrigerant flow component. Furthermore, in this embodiment, the refrigerant is air used for cooling. The refrigerant passing through pipe 1091 is discharged to the outside via air outlet 1975 from exhaust port 1222.

[0086] The pipe 1091 has a wall portion 1933 serving as a first receiving portion. The pipe 1091 is a molded component made of resin material, and the wall portion 1933 is integrally molded onto the upper surface 1091a of the pipe 1091 as part of the pipe 1091.

[0087] At each corner of the inner side of the wall portion 1933, a post 1976 is provided for threading the speaker 1004 to the vicinity of the opening end 1933a of the wall portion 1933. A notch 1934 is provided at the opening end 1933a of the wall portion 1933. Similar to Embodiment 1, a cable (not shown) passes through the notch 1934 and transmits an acoustic signal to the speaker 1004 via the cable.

[0088] The wall portion 1933 is shaped such that its inner wall 1933b surrounds the speaker 1004 around the outer edge of the frame 1042 of the speaker 1004. Therefore, by positioning the speaker 1004 near the opening end 1933a of the wall portion 1933, and with the opening end 1933a side of the wall portion 1933 closed by the speaker 1004, the space 1093e behind the speaker 1004 can be made into a sealed space.

[0089] By making the space 1093e at the back of the speaker 4 a sealed space, sound waves from the front surface of the speaker 1004 can be isolated from sound waves from the back, thereby suppressing the situation where low-frequency sounds from the front surface and low-frequency sounds from the back, which are out of phase with each other, cancel each other out. As a result, the sound pressure level of the speaker 1004 can be increased.

[0090] Furthermore, the space 1093e on the back of the speaker 1004, like in Embodiment 1, does not need to be a completely enclosed space.

[0091] like Figure 10 As shown, in the wall portion 1933, apart from the notch 1934 provided at the opening end 1933a, no hole is provided penetrating the wall portion 1933. Furthermore, as... Figure 10 As shown, no hole is provided on the upper surface 1091a facing the space 1093e to connect the space 1093e and the space 1093s. Therefore, the space 1093e at the back of the speaker 1004 can be made a sealed space by means of the wall portion 1933 and the upper surface 1091a of the conduit 1091. That is, the wall portion 1933 provided in the conduit 1091 can function as a sealed outer cover for the speaker 1004. In addition, the space 1093s, which is opposite to the upper surface 1091a facing the space 1093e, faces the inner side of the conduit 1091. That is, the conduit 1091 has a portion with one side facing the space 1093e and the other side facing the space 1093s.

[0092] As described above, the wall portion 1933 is integrally formed with the pipe 1091 on the upper surface 1091a of the pipe 1091. That is, since the wall portion 1933, which functions as the outer cover of the speaker 1004, is integrally provided in the pipe 1091, the increase in the number of components can be suppressed, and the increase in cost caused by the increase in the number of components can also be suppressed.

[0093] like Figure 9 and Figure 10 As shown, the speaker 1004 is housed in the wall portion 1933 of the conduit 1091 and is disposed in the outer housing 1002 at the position where the speaker hole 1211 is provided.

[0094] Furthermore, although not shown, a resilient member is provided between the opening end 1933a of the wall portion 1933 and the inner surface of the upper housing 1021, similar to that in Embodiment 1. Thus, by providing the resilient member, tone modulation can be improved in the same way as in Embodiment 1.

[0095] Alternatively, an extension can be formed on the inner wall 1933b of the wall portion 1933, similar to Embodiment 1. By providing the extension, similar to Embodiment 1, the airtightness of the rear space 1093e of the speaker 1004 can be improved, thereby further increasing the sound pressure level of the speaker 1004.

[0096] Furthermore, in this embodiment, the wall portion 1933 is formed in the duct 1091 used by the exhaust unit 1009, but it can also be configured such that the wall portion 1933 is provided in the duct used by the intake unit 1008 and functions as the outer cover of the speaker 1004. Alternatively, the wall portion 1933 can also be provided in other ducts disposed inside the outer housing 1002.

[0097] As described above, the projector 1000 according to this embodiment can achieve the following effects in addition to the effects of embodiment 1.

[0098] The projector 1000 of this embodiment includes: an outer casing 1002 as an outer shell; an exhaust unit 1009 as a cooling device, which is housed in the outer casing 1002 and has a wall portion 1933 as a first housing portion and a pipe 1091 as a refrigerant flow portion for refrigerant to flow inside; and a speaker 1004, which is housed in the wall portion 1933 and has a frame 1042, wherein the first housing portion has a wall portion 1933 extending along the frame 1042.

[0099] According to this structure, a wall portion 1933 is provided in the conduit 1091, which functions as the outer cover of the speaker 1004. Therefore, it is possible to suppress the leakage of sound waves emitted from the back of the speaker 1004 to the front surface of the speaker 1004, thereby increasing the sound pressure.

[0100] Furthermore, since the wall portion 1933, which functions as the outer cover of the speaker 1004, is integrally formed with the conduit 1091, there is no need to provide a dedicated component to seal the space 1093e at the back of the speaker 1004, thus suppressing the increase in components and cost.

[0101] Furthermore, since the conduit 1091 does not house the optical unit 1005 for image formation, it is possible to suppress image distortion in the optical unit 1005 caused by the sound waves from the speaker 1004.

Claims

1. A projector, wherein, This projector has the following features: outer shell; An inner housing is housed within the outer housing, having a first storage portion and a second storage portion for storing functional elements; as well as The speaker, housed in the first receiving section, has a frame. The first storage section has a wall extending along the frame. The functional component is a power supply unit. The inner housing is a power supply unit housing composed of an upper holding portion and a lower holding portion, which serve as the second storage portion. The wall portion, as part of the upper retaining portion, is integrally formed on the upper surface of the upper retaining portion. The speaker is mounted on the wall. By positioning the speaker at the open end of the wall, the open end of the wall is closed by the speaker, thereby forming a sealed space behind the speaker.

2. The projector according to claim 1, wherein, The outer shell has an inner surface opposite to the first storage portion. The projector has an elastic component disposed between the opening end of the wall portion of the first storage section and the inner surface.

3. The projector according to claim 2, wherein, The speaker has a cable for transmitting electrical signals. The first receiving part has a notch at the opening end. The cable is led out from the first receiving part through the notch.

4. The projector according to claim 1, wherein, The first storage section is disposed between the second storage section and the outer shell.

5. A projector, wherein, This projector has the following features: outer shell; A cooling device, which is housed in the outer casing, has a first housing section and a pipe serving as a refrigerant flow section for refrigerant to flow inside; as well as The speaker, housed in the first receiving section, has a frame. The pipe has a wall portion that extends along the frame, serving as the first receiving portion. The wall portion, as part of the pipe, is integrally formed on the upper surface of the pipe. The speaker is mounted on the wall. By positioning the speaker at the open end of the wall, the open end of the wall is closed by the speaker, thereby forming a sealed space behind the speaker.

Images