JP2010197848A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector that prevents a discoloration phenomenon from arising in an exterior housing. <P>SOLUTION: The projector 1 includes: the exterior housing 2 composing an exterior; a light source device 31 attachable/detachable to/from the exterior housing 2; a connection member 10 that is composed independently of the exterior housing 2, is connected to the exterior housing 2, and has a replacement opening 111 for replacing the light source device 31 in an arrangement position corresponding to the position where the light source device 31 is to be disposed; and a lid member that is attached to the exterior housing 2 so as to be detachable, closes the replacement opening 111, and composes a part of the exterior. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector.

Conventionally, there has been proposed a projector that allows a light source device to be replaced with a new light source device without disassembling the exterior housing (see, for example, Patent Document 1).
In the projector described in Patent Document 1, the light source device is unitized by storing a light source lamp and a reflector in a lamp housing. In addition, a replacement opening (lamp opening) is formed in the exterior housing corresponding to the position where the light source device is disposed, and a lamp cover is attached so as to close the replacement opening.
With the configuration described above, the user can replace the light source device unitized with a new light source device by removing the lamp cover from the exterior housing and removing the unitized light source device through the replacement opening.

JP 2007-33792 A

By the way, a synthetic resin molded product is prone to a so-called discoloration phenomenon in which the material itself is discolored by light irradiation or heat.
In the projector described in Patent Document 1, the exterior housing is a synthetic resin molded product. And since the periphery of the replacement opening in the exterior housing is close to the light source device, discoloration is likely to occur due to light irradiation from the light source device and radiant heat from the lamp housing.
If the discoloration phenomenon occurs in this way, the material itself deteriorates, and it is difficult to ensure sufficient strength of the exterior casing. Further, when the lamp cover is removed, the discolored portion is noticeable, so that the appearance is poor.

  An object of the present invention is to provide a projector that can prevent a discoloration phenomenon from occurring in an exterior housing.

  The projector of the present invention is a projector including an exterior casing that constitutes an exterior and a light source device that is detachable inside and outside the exterior casing, and is configured separately from the exterior casing. A connecting member connected to a position corresponding to the position of the light source device in the housing, and having a replacement opening for replacing the light source device; And a lid member that closes the opening and constitutes a part of the exterior.

In the present invention, the projector is provided separately from the exterior housing and includes a connection member having a replacement opening. As a result, the periphery of the replacement opening that is likely to cause a discoloration phenomenon can be configured with the connecting member, and the discoloration phenomenon can be prevented from occurring in the exterior housing. For this reason, it can prevent that the material of an exterior housing | casing deteriorates, Therefore The intensity | strength of an exterior housing | casing can fully be ensured.
Here, as the connection member, for example, a configuration in which the material itself is a black synthetic resin molded product (hereinafter referred to as a first configuration) or a configuration formed using a material such as a metal having high heat resistance (hereinafter referred to as a first configuration). 2).
And when a connection member is made into the 1st composition and the 2nd composition, even if it is a case where a discoloration phenomenon arises in a connection member, a discoloration location can be made inconspicuous.
Therefore, by adopting the connection members having the respective configurations described above, when the lid member is removed from the exterior housing, the discolored portion is not noticeable, and the appearance can be improved.

In the projector according to the aspect of the invention, the connection member includes a first light shielding portion having a cylindrical shape in which the replacement opening is formed on an inner peripheral surface, and the first light shielding portion is configured such that the connection member is the exterior member. It is preferable that one end side protrudes toward the inside of the exterior casing while being connected to the casing.
By the way, the light which goes to the outside from the inside of the exterior casing through the replacement opening easily leaks from the connection portion between the exterior casing and the lid member even when the replacement opening is closed by the lid member. Is.
Then, in order to prevent light leakage to the outside of the exterior housing, as described in Patent Document 1, a frame-shaped rib is projected from the edge of the replacement opening toward the light source device, A configuration is often used in which the ribs shield light from the inside of the exterior housing from the inside through the replacement opening.
Since such a rib is disposed close to the light source device, the discoloration phenomenon is particularly likely to occur due to light irradiation or radiant heat from the lamp housing.

  In the present invention, the connecting member has a cylindrical shape with one end projecting toward the inside of the exterior casing, and shields the light that is directed from the inside of the exterior casing through the replacement opening, similarly to the rib described above. A first light shielding portion is provided. As a result, the first light-shielding portion that is particularly likely to cause a discoloration phenomenon is provided in the connection member. Therefore, if the connection member (first light-shielding portion) has the above-described first or second configuration, for example, The effect that it can be made to look good can be achieved suitably.

In the projector according to the aspect of the invention, the exterior casing is formed with a casing-side opening at a position corresponding to the arrangement position of the light source device, and the first light-shielding portion includes the connection member at the exterior casing. In the connected state, it is preferable that the other end is fitted into the housing side opening.
In the present invention, the other light-shielding portion of the first light-shielding portion is fitted into the housing-side opening. That is, when the lid member is removed from the exterior housing, only the other end side of the cylindrical shape in the first light shielding portion is exposed to the outside, and the connection member itself can be made inconspicuous. For this reason, while being able to miniaturize a connection member, the effect that it can be made the thing of the good appearance mentioned above can be achieved more suitably.

In the projector according to the aspect of the invention, an attachment hole for attaching the lid member is formed in the exterior casing, and the connection member is located between the light source device and the attachment hole, and is connected to the light source device. It is preferable to include a second light shielding portion that shields light directed toward the mounting hole.
In the present invention, since the connecting member includes the above-described second light shielding portion, light that leaks from the light source device and travels toward the mounting hole can be shielded by the second light shielding portion. For this reason, it is possible to prevent light leakage to the outside of the outer casing through the mounting hole.

In the projector according to the aspect of the invention, the power supply device that supplies power supplied from the outside through the power connector to the light source device, and the power connector and the power supply device are connected via a cable, and the lid member can be attached and detached. An interlock switch that allows or cuts off the power supply from the power connector to the power supply device in conjunction with the inner wall of the outer casing is opposed to the inner wall of the opposing side wall portion facing the side wall portion to which the lid member is attached. Preferably, a first support portion that supports the lock switch is provided upright, and the connection member includes a second support portion that supports the interlock switch.
By the way, when the interlock switch is configured to be supported only by the first support portion, the interlock switch is tilted in the direction of falling with the support position by the first support portion as a fulcrum, and mechanically connected to the lid member. There is a possibility that the interfering portion is displaced from a desired position. That is, when the lid member is attached to the exterior housing, the interlock switch cannot be turned on by the lid member (allowing power supply from the power connector to the power supply device), and the interlock switch is turned off (from the power connector to the power supply device). The power supply cannot be turned on even if the lid member is attached to the exterior casing.
In the present invention, the connection member is provided with the second support portion, and the interlock switch is supported by both the first support portion and the second support portion. This prevents the interlock switch from tilting in the direction of tilting with the support position of the first support portion as a fulcrum, and the interlock switch is reliably turned on by the lid member when attached to the lid member to the exterior housing. can do.

In the projector according to the aspect of the invention, it is preferable that a shielding plate that covers the replacement opening is attached to the back surface of the lid member.
In the present invention, the shielding plate attached to the back surface of the lid member has a planar shape that covers the replacement opening. As a result, the light directed to the lid member through the replacement opening and the radiant heat from the lamp housing can be reliably blocked by the shielding plate, and the lid member can be prevented from being discolored by light irradiation or radiant heat. .

In the projector according to the aspect of the invention, in the state where the light source device is inserted into the exterior casing through the replacement opening and is not attached to the interior of the exterior casing, the shielding plate has the lid. It is preferable that a protrusion that mechanically interferes with the light source device is formed when the member is attached to the exterior casing.
Here, the light source device is mounted inside the exterior housing as shown below.
When a connector (hereinafter referred to as a first connector) provided in the light source device and a connector (hereinafter referred to as a second connector) provided in the exterior housing are connected, power can be supplied to the light source device via each connector. It becomes a state (a state in which the light source device can be driven).
Then, the light source device is inserted into the exterior casing through the replacement opening and pressed in the insertion direction, whereby the first connector is connected to the second connector and is mounted inside the exterior casing.
On the other hand, when the light source device is not attached (inserted into the exterior casing but not attached), the connectors are not connected to each other, so that power is not supplied (cannot be driven). .
Then, since the first connector is not connected to the second connector in the unmounted state, the light source device is positioned on the replacement opening side with respect to the mounted position (position where each connector is connected). It will be.

In the present invention, since the above-described protrusion is formed on the shielding plate, when the lid member is attached to the exterior housing in a state where the light source device is not attached, the protrusion is projected into the exterior housing through the replacement opening. The protruding portion can be mechanically interfered with the light source device. That is, even when the light source device is not attached, the light source device can be attached to the exterior casing by attaching the lid member to the exterior casing and pressing the light source device with the protrusions.
Also, even when the shielding plate is formed in a large planar shape so as to cover the replacement opening, the projection is formed on the shielding plate. The protrusion can be protruded into the exterior housing through the opening, and the light source device can be set from the unmounted state to the mounted state as described above.

FIG. 2 is a perspective view illustrating an appearance of a projector according to the embodiment. FIG. 2 is a perspective view illustrating an appearance of a projector according to the embodiment. The figure which shows typically the apparatus main body accommodated in the exterior housing | casing in this embodiment. The figure for demonstrating the shape of the installation part in this embodiment. The disassembled perspective view which decomposed | disassembled the upper case and connection member in this embodiment. The disassembled perspective view which decomposed | disassembled the upper case and connection member in this embodiment. The figure for demonstrating the function of the 2nd light-shielding part in this embodiment. The figure which shows the support structure of the interlock switch in this embodiment. The figure which shows the support structure of the interlock switch in this embodiment. The perspective view which looked at the back of the lamp cover in this embodiment from the front side. The figure for demonstrating the structure of the shielding board in this embodiment. The figure for demonstrating the structure of the shielding board in this embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Appearance structure]
1 and 2 are perspective views showing an appearance of the projector 1 according to the present embodiment. Specifically, FIG. 1 is a perspective view of the projector 1 viewed from the front side where the projection lens 36 is disposed, and FIG. 2 is a perspective view of the projector 1 viewed from the back side opposite to the front side. .
The projector 1 forms an image according to image information and projects it on a screen (not shown). As shown in FIG. 1 or FIG. 2, the projector 1 includes an exterior housing 2 that constitutes an exterior.

The exterior housing 2 accommodates the apparatus main body of the projector 1. As shown in FIG. 1 or 2, the exterior casing 2 includes an upper case 21 having a top surface portion 2A as a side wall portion, and a lower case 22 having a bottom surface portion 2B as an opposite side wall portion facing the top surface portion 2A. These cases 21 and 22 are combined.
In the present embodiment, the exterior housing 2 is a synthetic resin molded product.
As shown in FIG. 1 or FIG. 2, in the exterior casing 2, on the back side of the top surface portion 2A, there is an installation portion 7 that is recessed from the outer surface toward the inside at the left corner portion as viewed from the front surface side. Is formed. Moreover, the lamp cover 8 as a cover member for replacing the light source device 31 described later is detachably attached to the installation portion 7.
The detailed shapes of the installation part 7 and the lamp cover 8 will be described later.

Further, in the exterior housing 2, a power connector 9 is provided on the back surface 2C adjacent to the top surface 2A and the bottom surface 2B in the lower left corner as viewed from the back as shown in FIG. Yes.
The power connector 9 is a connector into which a power cable (not shown) is inserted and power supplied from the outside via the power cable is supplied to the apparatus main body of the projector 1.

[Internal configuration]
FIG. 3 is a diagram schematically showing the apparatus main body housed in the exterior housing 2.
The main body shown in FIG. 3 is accommodated in the exterior housing 2. The apparatus body includes an optical unit 3, a filter circuit board 4, a power supply device 5, an interlock switch 6, and the like.
Although not shown in the drawings, a space other than the members 3 to 6 in the exterior housing 2 is provided with a cooling fan or the like that introduces air into the projector 1 and cools the internal components. It is assumed that a cooling unit, an exhaust unit including an exhaust fan or an exhaust duct for discharging the air inside the projector 1 to the outside, a control device for controlling the operation of each component of the projector 1, and the like are arranged.

[Configuration of optical unit]
The optical unit 3 forms and projects an image according to image information (image signal) under the control of the control device.
As shown in FIG. 3, the optical unit 3 includes a light source device 31 having a light source lamp 311, a reflector 312, a collimating lens 313, and a lamp housing 314 that houses and holds the optical components 311 to 313, a lens array 321, and the like. 322, an illumination optical device 32 having a polarization conversion element 323, and a superimposing lens 324, a color separation optical device 33 having dichroic mirrors 331 and 332, and a reflection mirror 333, an incident side lens 341, a relay lens 343, and a reflection mirror Optical having a relay optical device 34 having 342 and 344, three liquid crystal panels 351 as light modulators, three incident-side polarizing plates 352, three exit-side polarizing plates 353, and a prism 354 as a color combining optical device. Device 35, projection lens 36 as a projection optical device, and each light And an optical component housing 37 for accommodating the components 32-35.
In the optical unit 3, the light beam emitted from the light source device 31 and passing through the illumination optical device 32 is separated into three color lights of R, G, and B by the color separation optical device 33 by the configuration described above. Each separated color light is modulated by each liquid crystal panel 351 in accordance with image information. The modulated color lights are combined by a prism 354 to form an image and projected onto a screen by a projection lens 36.
In addition, about the optical components 31-36, since it is utilized as an optical system of various general projectors, concrete description is abbreviate | omitted.

[Configuration of filter circuit board]
As shown in FIG. 3, the filter circuit board 4 is disposed at a position close to the power connector 9 on the back side, and is connected to the power connector 9 via a cable (not shown). The filter circuit board 4 removes noise, particularly high-frequency noise, from the alternating current supplied from the outside via the power connector 9. Here, if high-frequency noise is included in the current, it greatly affects the operation of the electronic circuit, causing a malfunction. By removing the high-frequency noise with a coil element or the like mounted on the filter circuit board 4, the operation of the electronic components of the projector 1 such as the power supply device 5 can be stabilized.

[Configuration of power supply unit]
The power supply device 5 performs AC / DC conversion on the AC current from which noise has been removed by the filter circuit board 4 to generate a predetermined DC voltage, so that the light source lamp 311, the cooling fan, the exhaust fan, And output to the control device or the like. As shown in FIG. 3, the power supply device 5 is disposed at a substantially central portion in the left-right direction on the front side. The power supply device 5 can be constituted by, for example, a rectifier circuit having a diode bridge or the like that rectifies an alternating current into a direct current, a DC / DC converter that converts an input direct voltage into a predetermined voltage, or the like. .

[Configuration of interlock switch]
The interlock switch 6 is connected between the filter circuit board 4 and the power supply device 5 via respective cables (not shown), and is pressed (pressed) so that the cables are in a conductive state (filter circuit board 4). Power supply to the power supply device 5 is allowed), and is configured by a mechanical switch that brings the cables out of conduction (cuts off the power supply from the filter circuit board 4 to the power supply device 5) by releasing the press. Has been.
Here, in the lower case 22, a first support portion 221 having a rectangular frame shape that protrudes upward on the back side with respect to the arrangement position of the light source device 31 and corresponds to the outer shape of the interlock switch 6. (See FIGS. 8 and 9).
The interlock switch 6 is fitted to the first support portion 221 on the lower side.

[Detailed shape of installation section]
FIG. 4 is a view for explaining the shape of the installation portion 7. Specifically, FIG. 4 shows a state in which the portion where the lamp cover 8 is disposed is enlarged and the lamp cover 8 is removed in the state shown in FIG.
As shown in FIG. 4, the installation portion 7 is recessed from the outer surface to the inside of the exterior housing 2, and is formed from the top surface portion 2A to the back surface portion 2C and the side surface portion 2D adjacent to the top surface portion 2A.
That is, the installation unit 7 includes a first installation unit 71 formed on the top surface 2A, a second installation unit 72 formed on the back surface 2C, and a third installation unit 73 formed on the side surface 2D. Is done.

As shown in FIG. 4, the first installation portion 71 has a substantially rectangular shape in a plan view, and has an L-shaped first recess 711 that is recessed inward from the outer surface of the upper case 21 and a first recess 711. Furthermore, it has the 2nd recessed part 712 of planar view rectangular shape recessed inside, and has a stepped shape.
The first recess 711 is a portion with which the back surface of the lamp cover 8 comes into contact with the lamp cover 8 in a state where the lamp cover 8 is installed in the installation unit 7.
In the second recess 712, a housing side opening 713 is formed in the bottom portion 712A.
The housing side opening 713 has a shape corresponding to the planar shape of the light source device 31 (lamp housing 314) at a position corresponding to the position where the light source device 31 is disposed.
Then, a part of the connecting member 10 described later is fitted into the housing side opening 713.
The detailed shape of the connecting member 10 will be described later.

Further, in the second recess 712, a first mounting hole 714 for mounting the lamp cover 8 is formed on the front side so as to penetrate the inside and outside of the exterior housing 2 and straddle the bottom portion 712A and the front side wall portion 712B. ing.
Further, in the bottom portion 712A of the second recess 712, a through-hole 715 that penetrates toward the internal interlock switch 6 is formed on the back side on the right side as seen from the back side, as shown in FIG. Yes.
Specifically, the through hole 715 is formed to extend from a position facing the interlock switch 6 to the second installation portion 72.

In the second installation portion 72, a pair of second attachment holes 721 for attaching the lamp cover 8 are formed in the bottom portion 72 </ b> A on both the left and right sides so as to penetrate the exterior casing 2.
Further, in the second installation portion 72, a fixing recess 722 that is further recessed toward the inside is formed in the bottom portion 72A.
The fixing recess 722 is a portion where a fixing member (not shown) is disposed.
Specifically, the fixing member is a member to which a screw for fixing the lamp cover 8 to the installation portion 7 is screwed.

In the third installation portion 73, a detachable recess 731 that is further recessed toward the inside is formed on the front surface side of the bottom portion 73A.
The detachable recess 731 is formed so as to extend to the first installation portion 71 along the front side wall portion 73B.

  Further, in the third installation portion 73, a third attachment hole for attaching the lamp cover 8 to the front side wall portion 73 </ b> B penetrates the exterior housing 2 in the front-rear direction along the bottom portion of the attachment / detachment recess 731. 732 is formed.

[Detailed shape of connecting member]
5 and 6 are exploded perspective views in which the upper case 21 and the connecting member 10 are disassembled. Specifically, FIG. 5 is a view seen from the upper back side, and FIG. 6 is a view seen from the lower front side.
As shown in FIG. 5 or FIG. 6, the connecting member 10 is a member that is configured separately from the exterior housing 2 and is connected to the upper case 21.
In the present embodiment, the connection member 10 is a synthetic resin molded product whose material itself is black.
The connecting member 10 includes a first light shielding portion 11 and an overhang portion 12.

The first light shielding portion 11 has an opening 111 corresponding to the planar shape of the light source device 31 on the inner peripheral surface, and is formed in a cylindrical shape extending in the vertical direction.
As shown in FIG. 4, the first light shielding portion 11 is positioned so as to surround the light source device 31 when viewed from the top surface portion 2 </ b> A in a state where the connection member 10 is attached to the upper case 21, and an upper end portion. Fits into the housing side opening 713.
The light source device 31 is replaced by gripping a grip 314A (FIG. 4) provided on the lamp housing 314 and attaching / detaching it to the exterior housing via the opening 111.
That is, the opening 111 corresponds to a replacement opening according to the present invention.

In addition, the first light-shielding portion 11 is in a state where the connecting member 10 is attached to the upper case 21, and the lower end portion protrudes downward with respect to the back surface of the upper case 21 as shown in FIG. It is located in the position close to.
In other words, the first light shielding unit 11 has a function of shielding light traveling from the inside of the exterior housing 2 to the outside through the replacement opening 111.
As shown in FIG. 5 or FIG. 6, the overhanging portion 12 is a portion that projects outward from the outer peripheral surface of the first light shielding portion 11 and is fixed to the back surface of the upper case 21 with screws Sc (FIG. 6).
And the overhang | projection part 12 is positioned so that the periphery of the housing | casing side opening part 713 may be opposed in the state in which the connection member 10 was attached to the upper case 21 (refer FIG. 7).

FIG. 7 is a diagram for explaining the function of the second light shielding portion 121A. Specifically, FIG. 7 is a longitudinal cross-sectional view taken along a plane extending in the front-rear direction through the position where the first mounting hole 714 is formed.
As shown in FIG. 5 or FIG. 6, second light-shielding portions 121 </ b> A to 121 </ b> D are respectively provided at positions corresponding to the mounting holes 714, 721, and 732 in the overhanging portion 12.
These second light shielding portions 121 </ b> A to 121 </ b> D are positioned between the light source device 31 and the mounting holes 714, 721, and 732, respectively, in a state where the connection member 10 is attached to the upper case 21.
Here, in the lamp housing 314, an opening 314B (FIG. 7) is formed for cooling the light source lamp 311, the reflector 312 and the like housed inside by introducing or discharging air to the inside. .
Then, as shown in FIG. 7, the second light shielding portion 121 </ b> A is located between the light source device 31 and the first mounting hole 714, thereby leaking from the opening 314 </ b> B and heading toward the first mounting hole 714. Block out light.
The other second light shielding portions 121B to 121D also have a function of shielding light that leaks from the light source device 31 and travels toward the mounting holes 721 and 732 in the same manner as described above.

8 and 9 are diagrams showing the support structure of the interlock switch 6. FIG. Specifically, FIG. 8 is a perspective view of the support structure of the interlock switch 6 as viewed from the back side, and FIG. 9 is a longitudinal sectional view of the support structure shown in FIG. 8 cut along a plane extending in the front-rear direction.
Further, as shown in FIG. 5 or FIG. 6, the second portion in which the top surface portion 2 </ b> A side of the interlock switch 6 is fitted in a position where the projecting portion 12 interferes with the through hole 715 when viewed from the top surface portion 2 </ b> A side. A support hole 122 as a support portion is formed.
That is, as shown in FIG. 8 or FIG. 9, the interlock switch 6 has a bottom surface portion 2B side fitted into the first support portion 221 and a top surface portion 2A side fitted into the support hole 122. It is supported by both of the connecting members 10.

[Detailed shape of lamp cover]
FIG. 10 is a perspective view of the back surface of the lamp cover 8 as viewed from the front surface side.
As shown in FIG. 10, the lamp cover 8 has a shape corresponding to the installation part 7 and closes the replacement opening 111 by being installed in the installation part 7.
When the lamp cover 8 is installed on the installation unit 7, the first cover unit 81 is in contact with the first installation unit 71 and forms a part of the top surface 2 </ b> A, and the second installation unit 72 is in contact with the rear surface unit. The second cover portion 82 that constitutes a part of 2C and the third cover portion 83 that abuts against the third installation portion 73 and constitutes a part of the side surface portion 2D.

In the first cover portion 81, the back surface protrudes downward and extends in the left-right direction corresponding to the front-side edge of the replacement opening 111, and the left and right edges of the replacement opening 111. Correspondingly, a substantially U-shaped rib 811 having portions 811B and 811C extending in the front-rear direction is formed.
Then, on the back surface of the first cover portion 81, a shielding plate 84 is attached to a portion surrounded by the ribs 811 as shown in FIG.
The detailed shape and function of the shielding plate 84 will be described later.

In the part 811A, a first engagement protrusion 812 that protrudes toward the front surface side and is inserted through the first attachment hole 714 is formed at a position corresponding to the first attachment hole 714.
In the first cover portion 81, an operation protrusion 813 that protrudes downward and extends in the front-rear direction corresponding to the through hole 715 is formed on the back side of the back surface.
The operation protrusion 813 protrudes into the exterior housing 2 through the through hole 715 and presses the interlock switch 6 in a state where the lamp cover 8 is installed on the installation part 7.
In other words, the interlock switch 6 allows power supply to the power supply device 5 with the lamp cover 8 installed on the installation unit 7 and cuts off power supply to the power supply device 5 with the lamp cover 8 removed. To do.

In the second cover portion 82, two second engagement protrusions 821 that protrude toward the front surface side and are inserted through the respective second attachment holes 721 are provided at positions corresponding to the two second attachment holes 721. Is formed.
Further, on the back surface of the second cover portion 82, a fixing recess having a fixing hole 822A that is recessed toward the front surface at a position corresponding to the fixing recess 722 and through which a screw (not shown) is inserted in the bottom portion. 822 is formed.
In the third cover portion 83, a third engagement is formed at the end portion on the front surface side so as to be stepped on the right side (right side when viewed from the front side) with respect to the outer surface of the third cover portion 83 and projecting toward the front side. A joint protrusion 831 is formed. The third engagement protrusion 831 is a portion inserted through the third attachment hole 732.

And the lamp cover 8 is installed with respect to the installation part 7, as shown below.
First, the lamp cover 8 is applied to the installation portion 7 while the third engaging protrusion 831 is in contact with the bottom portion of the detachable recess 731, and the back surface of the lamp cover 8 is brought into contact with the first recess 711.
Next, by sliding the lamp cover 8 to the front side on the first recess 711, the engaging protrusions 812, 821, 831 are inserted into the mounting holes 714, 721, 732, and the lamp cover 8 is installed. Locked to the part 7.
Thereafter, a screw (not shown) is inserted into the fixing hole 822A and screwed into a fixing member (not shown) disposed in the fixing recess 722, whereby the lamp cover 8 is fixed to the installation portion 7. .
In addition, when removing the lamp cover 8, an operation opposite to the above is performed.

[Detailed shape of shielding plate]
11 and 12 are diagrams for explaining the configuration of the shielding plate 84. Specifically, FIG. 11 is a diagram comparing the planar shapes of the replacement opening 111 and the shielding plate 84. FIG. 12 is a view showing the positional relationship between the bulging portion 841 and the light source device 31, and is a longitudinal sectional view cut along a plane that passes through the bulging portion 841 and extends in the front-rear direction.
The shielding plate 84 is made of a metal plate, and is attached to the rear surface of the lamp cover 8 with a predetermined interval. The shielding plate 84 blocks radiant heat from the lamp housing 314 and prevents thermal deterioration of the lamp cover 8. Further, the shielding plate 84 also has a function of shielding light directed toward the lamp cover 8 through the replacement opening 111.
As shown in FIG. 11, the shielding plate 84 has a larger planar shape than the replacement opening 111 and is positioned so as to cover the replacement opening 111 in a state where the lamp cover 8 is installed in the installation part 7. It is done.

As shown in FIGS. 10 to 12, the shielding plate 84 is formed with a bulging portion 841 as a protruding portion that bulges downward by drawing.
As shown in FIG. 12, when the light source device 31 is mounted inside the exterior housing 2, the bulging portion 841 has the light source device 31 (lamp lamp) even if the lamp cover 8 is installed in the installation portion 7. There is no mechanical interference with the projecting portion 314C) projecting on the top surface portion 2A side of the housing 314.
The light source device 31 is mounted inside the exterior housing 2 as described below.
When the first connector CN1 (FIG. 12) provided in the light source device 31 and the second connector CN2 provided in the exterior housing 2 are connected, power is supplied to the light source lamp 311 via the connectors CN1 and CN2. This is possible (the light source lamp 311 can be turned on).
Then, the light source device 31 is inserted into the exterior housing 2 through the replacement opening 111 and pressed toward the bottom surface portion 2B, whereby the first connector CN1 is connected to the second connector CN2, and the exterior housing is connected. It is mounted inside the body 2.

On the other hand, when the light source device 31 is not attached (inserted into the exterior casing 2 but not attached), the connectors CN1 and CN2 are not connected to each other, so that no power is supplied (light source) The lamp 311 cannot be turned on.
When the light source device 31 is not attached, the first connector CN1 is not connected to the second connector CN2, and therefore, the light source device 31 is positioned on the top surface 2A side with respect to the attachment position shown in FIG.
When the lamp cover 8 is installed in the installation part 7 in the unmounted state as described above, the bulging part 841 projects into the exterior housing 2 through the replacement opening 111, and the projecting part of the lamp housing 314 is provided. It will interfere with 314C mechanically.
That is, even when the lamp cover 8 is not attached as described above, the protruding portion 314C of the lamp housing 314 is pressed toward the bottom surface portion 2B by the bulging portion 841 by installing the lamp cover 8 on the installation portion 7. The light source device 31 is mounted inside the outer casing 2.

According to this embodiment described above, the following effects are obtained.
In the present embodiment, the projector 1 is provided separately from the exterior housing 2 and includes a connection member 10 having a replacement opening 111. As a result, the periphery of the replacement opening 111 that is likely to cause a discoloration phenomenon can be configured by the connection member 10, and the discoloration phenomenon can be prevented from occurring in the exterior housing 2. For this reason, since the raw material of the exterior housing | casing 2 can be prevented from deteriorating, the intensity | strength of the exterior housing | casing 2 is fully securable.

The connecting member 10 is a synthetic resin molded product whose material itself is black. For this reason, even if a discoloration phenomenon occurs in the connecting member 10, the discoloration portion can be made inconspicuous.
Therefore, when the lamp cover 8 is removed from the exterior housing 2, the discolored portion is not noticeable, and the appearance can be improved.

Here, in order to make the discoloration spot inconspicuous, the exterior housing 2 itself is made of a synthetic resin molded product whose material itself is black without using the connecting member 10 or has high heat resistance (no discoloration phenomenon occurs). It is conceivable to use a material such as metal. However, in such a configuration, the material of the exterior housing 2 is limited, and thus the degree of freedom in designing the exterior housing 2 is reduced.
Similarly, it is conceivable to paint the periphery of the housing side opening 713 of the exterior housing 2 in black without using the connection member 10 in order to make the discoloration spot inconspicuous. The manufacturing cost of the exterior housing 2 increases.
On the other hand, in the present embodiment, by adopting the connection member 10 whose material itself is a black synthetic resin molded product, it is not necessary to configure the exterior casing 2 as described above, and the design of the exterior casing 2 is designed. The exterior casing 2 can be manufactured at a low cost.

  In addition, the connection member 10 has a cylindrical shape with a lower end portion protruding toward the inside of the exterior housing 2, and shields light from the exterior from the interior of the exterior housing 2 through the replacement opening 111 to the outside. A light shielding unit 11 is provided. As a result, the first light-shielding portion 11 that is particularly likely to cause a discoloration phenomenon is provided in the connection member 10. Therefore, the connection member 10 is made of a synthetic resin molded product whose material itself is black, so that the above-described appearance is good. The effect that it can be used can be suitably achieved.

  Further, the first light-shielding portion 11 has a cylindrical upper end portion fitted into the housing-side opening 713. That is, when the lamp cover 8 is removed from the exterior housing 2, only the cylindrical upper end portion of the first light shielding portion 11 is exposed to the outside, and the connection member 10 itself is not conspicuous. it can. For this reason, while being able to miniaturize the connection member 10, the effect that it can make it the above-mentioned good-looking thing can be aimed at more suitably.

  Further, the connecting member 10 includes an overhanging portion 12 that protrudes outward from the outer peripheral surface of the first light shielding portion 11, and the light shielding portions 121 </ b> A to 121 </ b> D are provided on the overhanging portion 12. Accordingly, light that leaks from the light source device 31 and travels toward the mounting holes 714, 721, and 732 can be blocked by the second light blocking portions 121A to 121D. For this reason, it is possible to prevent light leakage to the outside of the exterior housing 2 through the mounting holes 714, 721, and 732.

  Further, a support hole 122 is formed in the connection member 10, and the interlock switch 6 is supported by both the first support portion 221 formed in the lower case 22 and the support hole 122. As a result, the interlock switch 6 does not tilt in the direction in which the interlock switch 6 is tilted with the support position by the first support portion 221 as a fulcrum, and when the lamp cover 8 is attached to the exterior housing 2, the operation protrusion 813 can reliably The interlock switch 6 can be turned on (allowing power supply from the filter circuit board 4 to the power supply device 5).

The shielding plate 84 attached to the back surface of the lamp cover 8 has a planar shape that covers the replacement opening 111. As a result, the light directed to the lamp cover 8 through the replacement opening 111 and the radiant heat from the lamp housing 314 can be reliably blocked by the shielding plate 84, and the lamp cover 8 is discolored due to light irradiation or radiant heat. It can be prevented from occurring.
Furthermore, since the bulging portion 841 is formed on the shielding plate 84, the light source device is installed at the bulging portion 841 by attaching the lamp cover 8 to the installation portion 7 even when the light source device 31 is not attached. By pressing 31, the light source device 31 can be mounted inside the exterior housing 2.
Further, even when the shielding plate 84 is formed in a large planar shape so as to cover the replacement opening 111, the bulging portion 841 is formed on the shielding plate 84, so that the lamp cover 8 is installed on the installation portion 7. When attaching to the outer casing 2, the bulging portion 841 can be protruded into the exterior housing 2 through the replacement opening 111, and the light source device 31 can be set from the unmounted state to the mounted state as described above.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the connecting member 10 is not limited to the shape described in the above embodiment, and may be any shape as long as it forms the periphery of the replacement opening 111.
For example, the installation part 7 which is a part of the exterior casing 2 is configured separately from the exterior casing 2. Moreover, it is set as the molded product which shape | molded the installation part 7 and the connection member 10 integrally. Then, the molded product is connected to the outer casing 2.

In the said embodiment, although the connection member 10 was a synthetic resin molded product whose material itself is black, it is not restricted to this.
For example, the connection member 10 may have a structure formed of a material such as metal that has high heat resistance and does not cause discoloration.
Further, for example, the connecting member 10 may be configured such that the material itself is molded with a synthetic resin having a color other than black and then painted with black.

In the embodiment, the projector 1 includes the three liquid crystal panels 351, but the present invention is not limited to this. That is, the present invention can also be applied to a projector using two or less or four or more liquid crystal panels.
In the embodiment, as the light modulation device, a reflection type liquid crystal panel may be adopted in addition to the transmission type liquid crystal panel. Further, as long as it is a light modulation device that modulates a light beam according to image information to form an image, a light modulation device having another configuration may be adopted. For example, the present invention can be applied to a projector using a light modulation device other than liquid crystal, such as a device using a micromirror. When such a light modulation device is used, the polarizing plates 352 and 353 on the light incident side and the light emitting side can be omitted.
In the embodiment, only the example of the front projection type projector has been described, but the present invention is also applicable to a rear type projector that includes a screen and performs projection from the back side of the screen.

  The projector of the present invention can be used as a projector used in presentations and home theaters.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 2A ... Top surface part (side wall part), 2B ... Bottom face part (opposite side wall part), 5 ... Power supply device, 6 ... Interlock Switch, 8 ... Lamp cover (lid member), 9 ... Power connector, 10 ... Connection member, 11 ... First light shielding part, 31 ... Light source device, 84 ... Shielding plate , 111 ... opening for replacement, 121A to 121D ... second light shielding part, 122 ... support hole (second support part), 221 ... first support part, 713 ... Housing side opening, 714, 721, 732 ... mounting hole, 841 ... bulge (projection).

Claims (7)

A projector comprising an exterior housing that constitutes an exterior, and a light source device that is detachable inside and outside the exterior housing,
A connection member configured separately from the exterior housing, connected to a position corresponding to the position of the light source device in the exterior housing, and having a replacement opening for replacing the light source device;
A projector, comprising: a cover member that is detachably attached to the exterior housing, closes the replacement opening, and forms a part of the exterior. The projector according to claim 1.
The connecting member is
A first light-shielding portion having a cylindrical shape in which the replacement opening is formed on an inner peripheral surface;
The first light shielding portion is
One end side protrudes toward the inside of the exterior casing in a state where the connection member is connected to the exterior casing. The projector according to claim 2,
In the outer casing,
A housing side opening is formed at a position corresponding to the arrangement position of the light source device,
The first light shielding portion is
In the state where the connection member is connected to the exterior casing, the other end is fitted into the casing-side opening. The projector according to any one of claims 1 to 3,
In the outer casing,
An attachment hole for attaching the lid member is formed,
The connecting member is
A projector comprising: a second light shielding portion that is located between the light source device and the mounting hole and shields light from the light source device toward the mounting hole. The projector according to any one of claims 1 to 4,
A power supply device for supplying the light source device with power supplied from outside via a power connector;
An interlock switch connected between the power connector and the power device via a cable, allowing or interrupting power supply from the power connector to the power device in conjunction with the attachment / detachment of the lid member;
A first support portion that supports the interlock switch is erected on the inner surface of the opposite side wall portion facing the side wall portion to which the lid member is attached in the exterior housing,
The connecting member is
A projector comprising: a second support portion that supports the interlock switch. The projector according to any one of claims 1 to 5,
On the back surface of the lid member,
A projector having a shielding plate for covering the replacement opening. The projector according to claim 6,
In the shielding plate,
When the light source device is inserted into the exterior casing through the replacement opening and is not mounted in the exterior casing, the light source is attached to the exterior casing when the lid member is attached to the exterior casing. A projector having a projection that mechanically interferes with the apparatus.

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