JP2009210860A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of achieving improvement of the degree of freedom in internal layout and miniaturization even when it is provided with an interlock switch. <P>SOLUTION: The projector 1 includes a light source device 31, a power supply device 5 which supplies power supplied from the outside through a power supply connector 10 to the light source device 31, and an external case 2 inside which the light source device 31 and the power supply device 5 are housed. An opening part for replacement is formed at a position corresponding to a disposed position of the light source device 31 on the external case 2, and a cover for covering the opening part for replacement is attachably/detachably provided on the external case 2. The interlock switch 6 connected between the power supply connector 10 and the power supply device 5 through a cable and allowing or interrupting power supply to the power supply device 5 from the power supply connector 10 interlocked with the attachment/detachment of the cover is disposed on a light emission rear side of a reflector 3112 constituting the light source device 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector.

2. Description of the Related Art Conventionally, there is a projector including a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information to form image light, and a projection optical device that enlarges and projects the image light onto a screen or the like. Are known.
In such a projector, since the brightness of the light beam emitted from the light source device decreases as the usage time elapses, a structure in which the user can replace the light source device is adopted (for example, see Patent Document 1). ).
By the way, in order for the user to replace the light source device in a safe state, it is necessary to cut off the power supply from the power supply device to the light source device when replacing the light source device.
For this reason, in the projector described in Patent Document 1, an interlock switch that turns the power on and off in conjunction with the attachment / detachment of a lid (lamp replacement lid) that is detachably provided on the exterior housing in order to replace the light source device. Is provided.
Specifically, the interlock switch is fixed to the shield case of the power supply device. When the lid is attached to the exterior housing, the interlock switch is pressed by the operating projection provided on the lid, and power supply to the light source device is allowed. Further, when the lid is removed (when the light source device is replaced), the interlock switch is pressed by the operating projection, and the power supply to the light source device is cut off.

JP 2000-321664 A

  However, in the projector described in Patent Document 1, since the interlock switch is fixed to the power supply device, it is necessary to dispose the power supply device around the lid, and the degree of freedom of layout inside the projector is limited. In addition, a space for providing an interlock switch between the power supply device and other members is required, which hinders downsizing of the projector.

  An object of the present invention is to provide a projector that can improve the degree of freedom of internal layout and can be downsized even when an interlock switch is provided.

  A projector according to an aspect of the invention includes a light source device, a power supply device that supplies power supplied from outside via a power connector to the light source device, and an exterior housing that houses the light source device and the power supply device therein. The light source device includes a light source lamp and a reflector that extends in a substantially concave shape in cross section and reflects a light beam emitted from the light source lamp, and the exterior housing is provided with a position where the light source device is disposed. An opening for replacement is formed at a position corresponding to the above, and a lid for closing the opening for replacement is detachably provided, and is connected between the power connector and the power supply device via a cable, An interlock switch that allows or interrupts power supply from the power connector to the power supply device in conjunction with the attachment / detachment of the lid, Characterized in that it is arranged on the light emitting rear side of the reflector.

In the present invention, the interlock switch constituting the projector is connected between the power connector and the power supply device via a cable. Accordingly, the interlock switch can be disposed at a position separated from the power supply device, that is, it is not necessary to dispose the power supply device around the lid body, and the degree of freedom of layout inside the projector can be improved.
Here, since the reflector has a substantially concave cross section, the light exit rear side of the reflector is likely to become a dead space. In the present invention, the interlock switch is disposed on the light emission rear side of the reflector. In other words, by disposing the interlock switch on the light emission rear side of the reflector that becomes a dead space, it is not necessary to provide a separate space for providing the interlock switch inside the exterior housing, and the projector can be downsized. I can plan.

In the projector according to the aspect of the invention, it is preferable that the outer casing has a frame shape corresponding to the outer shape of the interlock switch and is provided with a switch holding portion to which the interlock switch is fitted and fixed. .
In the present invention, the exterior housing is formed with a switch holding portion to which the interlock switch is fitted and fixed. Therefore, for example, a screw is used as compared with a configuration in which the interlock switch is secured to the exterior housing using a screw. There is no need to provide a separate fixing structure for the exterior casing or the interlock switch, and the projector can be further miniaturized by omitting the space where the fixing structure is provided.

  In the projector according to the aspect of the invention, the replacement opening may be formed on any one of the side walls of the exterior casing, and the peripheral edge of the replacement opening may be formed from the outer surface of the side wall to the inside. A concave portion for installation is formed from the one side wall portion to another side wall portion intersecting with the one side wall portion, and the lid body has a shape corresponding to the concave portion for installation, and the installation A slidably provided on the concave portion for the projection, and at least one of the edge of the replacement opening, the concave portion for installation, and the lid body are projected along the sliding direction of the lid body. When the fitting projection and the lid are slid to the mounting position where the lid is attached to the exterior housing, the engagement projection is inserted and the movement of the lid in a direction away from the exterior housing is restricted. An engagement structure having an engagement recess is provided. Masui.

By the way, for example, in the case where the lid is attached to and detached from the exterior housing in a direction substantially orthogonal to the opening surface of the replacement opening, in the state where the lid is attached to the exterior housing, When an external force is applied to the projector, the position of the lid may be shifted in a direction perpendicular to the opening surface with respect to the exterior housing. Since the interlock switch is configured to be interlocked with the attachment / detachment of the lid, when the position of the lid is shifted as described above, the power supply from the power connector to the power supply device is cut off. Therefore, there is a risk of malfunction such as no image light being projected from the projector.
In addition, in order to prevent the displacement of the lid as described above, a configuration in which the lid is fixed with a screw or the like is conceivable. However, in such a configuration, the screw is exposed on the outer surface of the exterior housing. The appearance of the projector will be damaged.

In the present invention, the lid is configured to be slidable on the installation recess formed in the exterior casing. At least one of the edge of the replacement opening, the installation recess, and the lid is provided with an engagement structure having an engagement protrusion and an engagement recess. Thus, by installing the lid in the installation recess and sliding it to the mounting position, the engagement projection is inserted into the engagement recess, and movement of the lid in a direction away from the exterior housing is restricted. In this state, the lid is attached to the exterior casing. For this reason, even when an external force is applied to the projector, the position of the lid in the direction orthogonal to the opening surface of the replacement opening relative to the exterior housing does not occur, preventing malfunction of the interlock switch. The projector can be operated satisfactorily.
Further, if the above-described engagement structure is employed, a configuration in which the lid is fixed with screws or the like does not have to be employed, so that the appearance of the projector is not impaired.

  In the projector according to the aspect of the invention, the lid may protrude inside through the replacement opening, and the edge of the replacement opening when the lid is slid in a direction away from the mounting position. And a protrusion for operation that allows the power supply by pressing the interlock switch in a state in which the protrusion for restriction is in contact with an edge of the replacement opening. Preferably, the operating projection extends along the sliding direction of the lid, and the pressing state of the interlock switch is continued when the lid is slid to the mounting position.

  By the way, for example, the lid is installed in the installation recess from the direction along the sliding direction of the lid on the installation recess, and further, the lid is slid toward the installation position on the installation recess, When the lid is attached to the exterior housing, the operating protrusion is configured to gradually press the interlock switch in the process of sliding the lid on the installation recess. There is a need to. Specifically, as the shape of the operating projection, it is necessary to form a slope that presses the interlock switch while being in contact with the interlock switch at the tip portion, and the sliding direction of the cover body is as much as the slope is formed. It is necessary to lengthen the length dimension along

In the present invention, the lid is provided with a regulating protrusion. That is, the lid cannot be installed in the installation recess from the direction along the sliding direction of the lid on the installation recess, and the regulating projection is formed in a direction substantially orthogonal to the opening surface of the replacement opening. Install the lid in the installation recess so that it can be inserted through the replacement opening, and then slide the lid toward the mounting position on the installation recess to attach the lid to the exterior housing. It is configured. Then, the operating projection extends along the sliding direction of the lid, presses the interlock switch in a state where the regulating projection abuts the edge of the replacement opening, and further, The interlock switch is kept pressed when sliding to the mounting position. As a result, it is not necessary to form an inclined surface for starting to gradually press the interlock switch in the process of sliding the lid on the installation recess as the operating protrusion, and the lid slides. The length dimension along the moving direction can be made short and simple.
In addition, it is not configured to gradually press the interlock switch in the process of sliding the lid on the installation recess, but the interlock switch is pressed by the operating projection with the lid installed in the installation recess. Therefore, it is possible to suppress the deformation of the operation protrusion and the interlock switch, and to reliably press the interlock switch when the cover is attached to the exterior housing, and to operate the projector satisfactorily.

In the projector according to the aspect of the invention, the exterior casing is provided with a shielding portion that covers the interlock switch in a plan view when viewed from a direction orthogonal to the opening surface of the replacement opening portion. Has a through-hole penetrating toward the interlock switch, and the lid protrudes inward through the through-hole and presses the interlock switch to allow the power supply. Is preferably provided.
According to the present invention, the exterior casing is provided with the shielding portion that has the through-hole through which the operating projection of the lid is inserted and covers the interlock switch in a planar manner. As a result, even when the lid is removed from the exterior housing, the interlock switch is covered with the shielding portion. For this reason, when the light source device is replaced, it is possible to prevent the interlock switch from being operated, and the light source device can be replaced in a safe state.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Appearance structure]
1 to 3 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 upper front side, FIG. 2 is a perspective view of the projector 1 viewed from the upper rear side, and FIG. 3 is a state in which the lamp cover is removed from the state of FIG. FIG.
Note that “upper”, “lower”, “left”, and “right” described below correspond to up, down, left, and right in the drawing view of FIG. In addition, “front” and “back” described below correspond to the front and back in the drawing view of FIG.
The projector 1 modulates a light beam emitted from a light source according to image information to form image light, and enlarges and projects the formed image light on a screen (not shown). As shown in FIGS. 1 to 3, 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 FIGS. 1 to 3, the exterior housing 2 includes an upper case 21 that constitutes a top surface portion 2A, a front surface portion 2B, a back surface portion 2C, a left side surface portion 2D, and a right side surface portion 2E as side walls, The projector 1 includes a lower case 22 that constitutes a bottom surface portion 2F, a front surface portion 2B, a back surface portion 2C, a left side surface portion 2D, and a right side surface portion 2E.
In the exterior housing 2, an installation recess 7 that is recessed from the outer surface toward the inside is formed in the corner portion on the left side of the back surface of the top surface portion 2A as shown in FIGS. Further, as shown in FIG. 3, an exchange opening 8 for exchanging a light source device 31 to be described later is formed at the bottom of the installation recess 7. Further, as shown in FIG. 1 or 2, the exterior housing 2 is detachably provided with a lamp cover 9 that is installed in the installation recess 7 and serves as a lid for closing the replacement opening 8. .
The detailed shapes of the installation recess 7, the replacement opening 8, and the lamp cover 9 will be described later.

  Further, in the exterior housing 2, a power cable (not shown) is inserted into the lower right corner of the back surface 2C as shown in FIG. 2 or 3, and is supplied from the outside via the power cable. A power connector 10 for supplying power to the main body of the projector 1 is exposed to the outside.

[Internal configuration]
FIG. 4 is a diagram schematically showing the apparatus main body accommodated in the exterior housing 2.
The apparatus main body shown in FIG. 4 is accommodated in the exterior housing 2. The device 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 device including an exhaust fan and 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]
As shown in FIG. 4, the optical unit 3 includes a light source device 31, an illumination optical device 32 having lens arrays 321 and 322, a polarization conversion element 323, and a superimposing lens 324, dichroic mirrors 331 and 332, and a reflection mirror 333. A color separation optical device 33, an incident side lens 341, a relay lens 343, and a relay optical device 34 having reflection mirrors 342 and 344, and three liquid crystal panels 351 as light modulation devices (a red light side liquid crystal panel). 351R, green light side liquid crystal panel 351G, and blue light side liquid crystal panel 351B), three incident side polarizing plates 352, three exit side polarizing plates 353, and a cross dichroic prism 354 as a color synthesizing optical device An optical device 35 having a projection lens 36 as a projection optical device, It is set illumination optical axis Ax of the constant, and a casing 37 for optical components for accommodating the optical components 32 to 35 in a predetermined position relative to the illumination optical axis Ax.
Since each of the optical components 32 to 36 described above is used as an optical system for various general projectors, a specific description thereof will be omitted, and only the configuration of the light source device 31 will be described below.

The light source device 31 is turned on by the power supplied from the power supply device 5 under the control of the control device, and emits parallel light to the illumination optical device 32. As shown in FIG. 4, the light source device 31 includes a light source device body 311 in which a light source lamp 3111 and a reflector 3112 are integrated, a collimating lens 312, and a lamp housing 313.
As the light source lamp 3111, a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp is used.
The reflector 3112 spreads in a substantially concave shape in cross section and reflects the light beam emitted from the light source lamp 3111 on the reflecting surface formed inside the concave shape. In this embodiment, an elliptical reflector that reflects the light beam emitted from the light source lamp 3111 so as to converge at a predetermined position is employed as the reflector 3112. In addition to the ellipsoidal reflector, the reflector 3112 may be a parabolic reflector that reflects the light beam emitted from the light source lamp 3111 in a substantially parallel manner. In this case, the collimating lens 312 disposed on the light emission front side of the reflector 3112 is omitted.
The collimating lens 312 substantially collimates the convergent light reflected by the reflector 3112 and emits it.

The lamp housing 313 has a substantially rectangular parallelepiped shape, and the light source device main body 311 and the parallelizing lens 312 are integrated by supporting and fixing the light source device main body 311 and the parallelizing lens 312 inside. The lamp housing 313 is connected to the optical component casing 37, and the light source device body 311 and the collimating lens 312 are placed at predetermined positions with respect to the optical component casing 37 (the central axis of the light beam emitted from the light source device 31 and the optical axis). Positioning is performed at a position where the illumination optical axis Ax set in the component housing 37 substantially coincides.
In the lamp housing 313, detailed illustration is omitted, but as shown in FIG. 4, the left corner portion (the corner portion on the light emission rear side of the reflector 3112) is chamfered.
In addition, a grip portion 313A (FIG. 3) that is gripped by the user is provided on the outer surface of the lamp housing 313 so as to protrude upward.

  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, and image light for each color light is formed. The image light for each color light is combined by the cross dichroic prism 354 and enlarged and projected on the screen (not shown) by the projection lens 36.

[Configuration of filter circuit board]
FIG. 5 is a perspective view showing an arrangement state of the filter circuit board 4, the power supply device 5, and the interlock switch 6 in the exterior housing 2.
As shown in FIG. 5, the filter circuit board 4 is disposed at the corner portion on the right side of the back surface and is connected to the power connector 10 via the cable C1. The filter circuit board 4 removes noise, particularly high-frequency noise, from the alternating current supplied from the outside via the power connector 10. 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 3111, the cooling fan, the exhaust fan, And output to the control device or the like. As shown in FIG. 5, 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]
As shown in FIG. 5, the interlock switch 6 is connected between the filter circuit board 4 and the power supply device 5 via cables C <b> 2 and C <b> 3, and when the switch unit 61 is pressed (pressed), the main body unit 62. It is composed of a mechanical switch that brings the cables C2 and C3 into a conducting state inside, and releases the pressing of the switch unit 61 to bring the cables C2 and C3 into a non-conducting state inside the main body 62.
Here, in the lower case 22, as shown in FIG. 5, the corner portion on the left side of the back surface (the light emission rear side of the reflector 3112 in the light source device 31) protrudes upward, and the outer shape of the main body 62. A rectangular frame-shaped switch holding portion 221 corresponding to the above is erected.
The interlock switch 6 is fitted and fixed to the switch holding portion 221 with the switch portion 61 facing upward.
In addition, a groove portion 611 is formed at the distal end portion of the switch portion 61 and is located at a substantially central portion in the left-right direction and extends in the front-rear direction.

[Detailed shapes of installation recess and replacement opening]
FIG. 6 is a perspective view showing the shapes of the installation recess 7 and the replacement opening 8.
As shown in FIG. 6, the installation recess 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 left surface portion 2D intersecting the top surface portion 2A. In the following, for convenience of explanation, a portion formed on the top surface portion 2A is referred to as a first installation recess 71, and a portion formed on the back surface portion 2C is referred to as a second installation recess 72, which is formed on the left side surface portion 2D. The part is referred to as a third installation recess 73.

In the first installation recess 71, a replacement opening 8 is formed in the bottom portion as shown in FIG.
The replacement opening 8 has a shape corresponding to the planar shape of the light source device 31 (lamp housing 313) at a position corresponding to the position where the light source device 31 is disposed.
The edge portion of the replacement opening 8 is formed in a rib shape so as to extend inward.
In the replacement opening 8, two notches 81 serving as recesses for engagement are provided at the substantially central position in the left-right direction and on the left side (right side in FIG. 6) below the front edge. , 82 are formed.

FIG. 7 is a plan view of the positional relationship between the replacement opening 8 and the interlock switch 6 as viewed from above.
Further, as shown in FIG. 7, in the first installation recess 71, the corner portion on the left side of the back surface projects toward the inside of the replacement opening 8 and is orthogonal to the opening surface of the replacement opening 8. When viewed from above, a shielding portion 711 that covers the interlock switch 6 in a planar manner is formed.
The shielding portion 711 is formed with a through hole 711 </ b> A that penetrates toward the internal interlock switch 6.
Specifically, the through hole 711 </ b> A extends in the front-rear direction corresponding to the groove 611 of the interlock switch 6, and is formed to penetrate to the bottom portion of the second installation recess 72.

  As shown in FIG. 6, in the second installation recess 72, two engagement recesses 721 and 722 that penetrate toward the inside are formed on the left and right sides as shown in FIG. 6.

[Detailed shape of lamp cover]
FIG. 8 is a perspective view of the lamp cover 9 as seen from the back side.
As shown in FIG. 8, the lamp cover 9 has a shape corresponding to the installation recess 7 and is slidable in the front-rear direction while being installed in the installation recess 7. The lamp cover 9 is attached to the exterior housing 2 and is in contact with the first installation recess 71 to constitute a part of the top surface portion 2A of the exterior housing 2 and a second installation. A second cover portion 92 that makes contact with the concave portion 72 for use and constitutes a part of the back surface portion 2C of the exterior housing 2, and a part of the left side surface portion 2D of the exterior housing 2 that makes contact with the third recess portion 73 for installation. The third cover portion 93 is included.

In the first cover portion 91, as shown in FIG. 8, a portion 912 that protrudes downward and extends in the left-right direction corresponding to the front-side edge of the replacement opening 8, as shown in FIG. A substantially U-shaped rib 911 having a portion 913 extending in the front-rear direction corresponding to the left edge portion and a portion 914 extending in the front-rear direction corresponding to the right edge portion is erected.
In the part 912, two first engagement members that protrude toward the front surface and are inserted through the notches 81 and 82 at positions corresponding to the two notches 81 and 82 of the replacement opening 8. Protrusions 9121 and 9122 are formed.
When the lamp cover 9 is installed in the installation recess 7, the portion 913 protrudes inward through the replacement opening 8, abuts on the left edge of the replacement opening 8, and is placed on the installation recess 7. Guides the sliding of the lamp cover 9 in the front-rear direction. Further, when the lamp cover 9 is slid to the rear side, the portion 913 contacts the rear side edge (the end of the shielding part 711) of the replacement opening 8, and moves to the rear side of the lamp cover 9. Functions as a first restricting protrusion that restricts the movement of the first member.

Similarly to the part 913, the part 914 protrudes inside through the replacement opening 8 when the lamp cover 9 is installed in the installation recess 7, and hits the right edge of the replacement opening 8. Then, the sliding of the lamp cover 9 in the front-rear direction on the installation recess 7 is guided. In addition, a second restricting protrusion 915 that protrudes more than the other part is formed at a substantially central part in the front-rear direction of the part 914.
Like the first restricting protrusion 913, the second restricting protrusion 915 comes into contact with the rear edge of the replacement opening 8 when the lamp cover 9 is slid toward the back. The movement of the lamp cover 9 toward the back side is restricted.

Moreover, in the 1st cover part 91, on the back side of a back surface, as shown in FIG. 8, it protrudes toward the downward side, and is substantially rectangular plate-shaped extended in the front-back direction corresponding to the through-hole 711A of the shielding part 711. An operating protrusion 916 is erected.
The operating projection 916 projects inward through the through hole 711A in a state where the lamp cover 9 is installed in the installation recess 7, and depresses the switch unit 61 of the interlock switch 6 between the cables C2 and C3. Is made conductive.
The length dimension in the front-rear direction of the operating protrusion 916 is set slightly larger than the length dimension in the front-rear direction of the groove 611 in the switch part 61.

  On the back surface of the second cover portion 92, the second installation recess 72 protrudes toward the front surface at positions corresponding to the two engagement recesses 721 and 722, and is inserted into the engagement recesses 721 and 722, respectively. Two second engaging protrusions 921 and 922 (see FIGS. 8 to 10) are formed.

[Operating structure of interlock switch with lamp cover]
Next, the operation structure of the interlock switch 6 by the lamp cover 9 will be described.
FIGS. 9 to 11 are diagrams for explaining the operation structure of the interlock switch 6 by the lamp cover 9. Specifically, FIG. 9 is a perspective view of the state in which the lamp cover 9 is installed in the installation recess 7 (the state before the lamp cover 9 is attached to the exterior housing 2) as viewed from above. FIG. 10 is a perspective view of the state of FIG. 9 as viewed from the inner surface side of the exterior housing 2. FIG. 11A is a diagram showing the state of the interlock switch 6 when the lamp cover 9 is removed, and FIG. 11B shows the state of the interlock switch 6 in the states of FIGS. 9 and 10. FIG. 11C is a diagram showing the state of the interlock switch 6 in a state where the lamp cover 9 is attached to the exterior housing 2 (the state shown in FIGS. 1 and 2).

When the lamp cover 9 is removed (the state shown in FIG. 3), as shown in FIG. 11A, the switch 61 is not pushed down by the operating projection 916, and the cable is connected by the interlock switch 6. A non-conducting state is established between C2 and C3. That is, in this state, power supply from the outside to the power supply device 5 is cut off via the power connector 10 and the filter circuit board 4. For this reason, for example, a power cable is inserted into the power connector 10 and power is supplied from the outside, and a power-on input operation is performed on the operation panel 11 (FIG. 1) by the user. Even if the lamp cover 9 is removed, the cables C2 and C3 are made non-conductive by the interlock switch 6 to drive the light source lamp 3111, the cooling fan, the exhaust fan, and the control device. Is stopped.
Then, in the state shown in FIG. 3, the user replaces the light source device 31 by inserting and removing the light source device 31 into and out of the exterior housing 2 through the replacement opening 8 while gripping the grip portion 313A.

When attaching the lamp cover 9 to the exterior housing 2 from the state of FIG. 3, first, as shown in FIG. 9 or 10, the restricting projections 913, 915 are placed inside the replacement opening 8. The lamp cover 9 is installed in the installation recess 7 from above so as to be inserted.
FIGS. 9 and 10 show a state in which the restricting projections 913 and 915 are in contact with the rear edge of the replacement opening 8 and the movement of the lamp cover 9 to the rear side is restricted. Yes.
In this state, as shown in FIG. 11 (B), the operating projection 916 protrudes inside through the through hole 711A of the shielding part 711, the switch part 61 is pushed down, and the interlock switch 6 causes the cables C2, Between C3 is made conductive.

Next, the lamp cover 9 is slid to the front side on the installation recess 7, and the lamp cover 9 is positioned at the mounting position shown in FIG. By positioning the lamp cover 9 at the mounting position, the first engaging protrusions 9121 and 9122 are inserted into the notches 81 and 82, respectively, and the second engaging protrusions 921 and 922 are used for the engagement. The recesses 721 and 722 are respectively inserted, and the upward movement of the lamp cover 9 is restricted.
As shown in FIGS. 11B and 11C, the operation projection 916 is a switch portion when the lamp cover 9 is slid from the state where the lamp cover 9 is installed in the installation recess 7 to the mounting position. The slider 61 is slid on the groove 611 and the switch 61 is kept pressed.

According to this embodiment described above, the following effects are obtained.
In the present embodiment, the interlock switch 6 constituting the projector 1 is connected between the power connector 10 and the power device 5 via cables C2 and C3. As a result, the interlock switch 6 can be disposed at a position separated from the power supply device 5, that is, the power supply device 5 does not need to be disposed around the lamp cover 9, and the degree of freedom in the layout inside the projector 1. Can be improved.
The interlock switch 6 is disposed on the light emission rear side of the reflector 3112. That is, by disposing the interlock switch 6 on the light emission rear side of the reflector 3112 that becomes a dead space, there is no need to separately provide a space for disposing the interlock switch 6 inside the exterior housing 2. Thus, the projector 1 can be downsized.

  Further, since the lower case 22 is formed with a switch holding portion 221 to which the interlock switch 6 is fitted and fixed, for example, compared with a configuration in which the interlock switch 6 is fixed to the exterior housing 2 using screws. In addition, it is not necessary to separately provide a fixing structure with screws in the exterior casing 2 or the interlock switch 6, and the projector 1 can be further miniaturized by omitting a space in which the fixing structure is provided.

Further, the lamp cover 9 is configured to be slidable on the installation recess 7 formed in the exterior housing 2. In addition, the notches 81 and 82, the engagement recesses 721 and 722, and the engagement protrusions 921, 922, 9121, and the edge of the replacement opening 8 and the installation recess 7 and the lamp cover 9 are provided. 9122 is provided. Thus, by installing the lamp cover 9 in the installation recess 7 and sliding it to the mounting position, the engagement protrusions 921, 922, 9121 are respectively formed in the notches 81, 82 and the engagement recesses 721, 722. , 9122 are inserted, and the lamp cover 9 is attached to the exterior housing 2 in a state in which the upward movement of the lamp cover 9 is restricted. For this reason, even when an external force is applied to the projector 1, the position of the lamp cover 9 with respect to the exterior housing 2 is not displaced upward, and the interlock switch 6 can be prevented from malfunctioning and the projector 1 can be improved. It can be operated.
Further, if the above-described engagement structure is employed, it is not necessary to employ a configuration in which the lamp cover 9 is fixed with screws or the like, so that the appearance of the projector 1 is not impaired.

  Further, the lamp cover 9 is provided with restricting protrusions 913 and 915. That is, the lamp cover 9 cannot be installed in the installation recess 7 from the front-rear direction along the sliding direction of the lamp cover 9 on the installation recess 7, and the restricting projections 913, 915 are used for replacement from above. The lamp cover 9 is installed in the installation recess 7 so as to be inserted through the opening 8, and the lamp cover 9 is slid toward the mounting position on the installation recess 7 to The lamp cover 9 is attached. The operating protrusion 916 extends along the sliding direction of the lamp cover 9, and the switch of the interlock switch 6 with the restricting protrusions 913 and 915 in contact with the edge of the replacement opening 8. The switch 61 is pressed down when the lamp 61 is slid to the mounting position, and the switch 61 is kept pressed. As a result, it is not necessary to form an inclined surface for gradually starting to press down the switch portion 61 at the tip portion in the process of sliding the lamp cover 9 on the installation recess 7 as the operating projection 916, and the lamp The length dimension along the sliding direction of the cover 9 can be a simple shape with a short dimension that is substantially the same as the length dimension of the groove portion 611 in the switch portion 61 in the front-rear direction.

  Further, in the process of sliding the lamp cover 9 on the installation recess 7, the switch portion 61 is not gradually started to be pressed, but the operation protrusion 916 is installed with the lamp cover 9 installed in the installation recess 7. Since the switch part 61 can be pressed down, the deformation of the operation projection part 916 and the switch part 61 is suppressed, and when the lamp cover 9 is attached to the exterior housing 2, the switch part 61 is surely pressed down, and the projector 1 is improved. It can be operated.

Further, the exterior housing 2 is provided with a shielding portion 711 that has a through-hole 711A through which the operating projection 916 is inserted and covers the interlock switch 6 in a plane. Thus, even when the lamp cover 9 is removed from the exterior housing 2, the interlock switch 6 is covered with the shielding portion 711. For this reason, when the light source device 31 is replaced, the interlock switch 6 can be prevented from being operated, and the light source device 31 can be replaced in a safe state.
Further, even when the lamp cover 9 is installed in the installation recess 7 and the switch 61 is pushed down by the operating projection 916, almost all of the replacement opening 8 is completely covered by the lamp cover as shown in FIG. 9, the light source device 31 can be exchanged in a safe state by preventing a hand or a finger from entering the inside through the replacement opening 8.

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 said embodiment, although the lamp cover 9 was provided in the top | upper surface part 2A side, it is not restricted to this, It is good also as a structure provided in the other side wall parts 2B-2F side. At this time, the position of the switch portion 61 in the interlock switch 6 may be provided at a position corresponding to the position where the lamp cover 9 is disposed.
In the embodiment, the lamp cover 9 is formed with the operation protrusion 916. However, the present invention is not limited to this, and the operation protrusion 916 is omitted and the switch part 61 is pressed down on the back surface of the lamp cover 9. It does not matter.

In the above-described embodiment, the lamp cover 9 is slid on the installation recess 7 and the lamp cover 9 is attached to the outer casing 2. The lamp cover 9 may be attached and detached in a direction substantially orthogonal to the opening surface of the opening 8.
In the embodiment, the notches 81 and 82 and the engagement recesses 721 and 722 as the engagement recesses are formed in the edge of the replacement opening 8 and the installation recess 7, respectively. Instead, it may be formed only on either the edge of the replacement opening 8 or the installation recess 7. In addition, engagement recesses 81, 82, 721, 722 were formed in the edge of the replacement opening 8 and the installation recess 7, and engagement protrusions 921, 922, 9121, 9122 were formed in the lamp cover 9. However, an engaging protrusion may be formed on the edge of the replacement opening 8 and the installation recess 7, and an engaging recess may be formed on the lamp cover 9.

In the above embodiment, the transmissive liquid crystal panel 351 is used as the light modulation device. However, the present invention is not limited to this, and the reflective liquid crystal panel or DMD (Digital Micromirror Device) (Texas Instruments Inc., USA) is used. Trademark) or the like.
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.

  Even when an interlock switch is provided, the present invention can be used for a projector used for a presentation or a home theater because the degree of freedom of an internal layout can be improved and the size can be reduced.

FIG. 2 is a perspective view illustrating an appearance of a projector according to the present embodiment. The perspective view which shows the external appearance of the projector in the said embodiment. The perspective view which shows the external appearance of the projector in the said embodiment. The figure which shows typically the apparatus main body accommodated in the exterior housing | casing in the said embodiment. The perspective view which shows the arrangement | positioning state of the filter circuit board in the exterior housing | casing in the said embodiment, a power supply device, and an interlock switch. The perspective view which shows the shape of the recessed part for installation in the said embodiment, and the opening part for replacement | exchange. The top view which looked at the positional relationship of the opening part for replacement | exchange in the said embodiment, and an interlock switch from the upper side. The perspective view which looked at the lamp cover in the said embodiment from the back side. The figure explaining the action | operation structure of the interlock switch by the lamp cover in the said embodiment. The figure explaining the action | operation structure of the interlock switch by the lamp cover in the said embodiment. The figure explaining the action | operation structure of the interlock switch by the lamp cover in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior casing, 5 ... Power supply device, 6 ... Interlock switch, 7 ... Installation recessed part, 8 ... Replacement opening part, 9 ... Lamp cover (lid), 10 ... power connector, 31 ... light source device, 81, 82 ... notch (engagement recess), 221 ... switch holding part, 711 ... shielding part , 711A, through-holes, 721, 722, recesses for engagement, 3111, light source lamps, 913, 915, projections for regulation, 916, projections for operation, 921, 922, 9121 , 9122... Projections for engagement, 3112... Reflector, C2, C3.

Claims (5)

A projector comprising: a light source device; a power supply device that supplies power supplied from outside via a power connector to the light source device; and an exterior housing that houses the light source device and the power supply device inside.
The light source device includes a light source lamp, and a reflector that extends in a substantially concave shape in cross section and reflects a light beam emitted from the light source lamp,
The exterior housing has a replacement opening formed at a position corresponding to the position where the light source device is disposed, and a lid that closes the replacement opening is detachably provided.
An interlock switch connected between the power connector and the power supply device via a cable, allowing or cutting off power supply from the power connector to the power supply device in conjunction with the attachment / detachment of the lid,
The interlock switch is disposed on a light emission rear side of the reflector. The projector according to claim 1, wherein
The projector having a frame shape corresponding to an outer shape of the interlock switch, and a switch holding portion to which the interlock switch is fitted and fixed is formed in the exterior casing. In the projector according to claim 1 or 2,
The replacement opening is formed on any one of the side wall portions of the exterior casing,
A recessed portion for installation is formed in the peripheral portion of the replacement opening from the outer surface of the side wall portion toward the inside, and from the one side wall portion to the other side wall portion intersecting the one side wall portion,
The lid has a shape corresponding to the installation recess, and is slidably provided on the installation recess.
At least one of an edge of the replacement opening and the recessed portion for installation and the lid body, an engaging protrusion protruding along a sliding direction of the lid body, and the lid body is the exterior An engagement structure having an engagement recess for restricting movement of the lid in a direction away from the exterior housing when the engagement protrusion is inserted when the engagement projection is slid to an attachment position attached to the housing. A projector characterized by being provided. The projector according to claim 3, wherein
In the lid,
A protruding protrusion for projecting inside through the replacement opening, and abutting against an edge of the replacement opening when the lid is slid in a direction away from the mounting position;
An operating protrusion that presses the interlock switch and allows the power supply in a state in which the restriction protrusion is in contact with an edge of the replacement opening;
The operating projection extends along a sliding direction of the lid, and continues to press the interlock switch when the lid slides to the mounting position. The projector according to any one of claims 1 to 4,
The exterior casing is provided with a shielding portion that covers the interlock switch in a plan view when viewed from a direction orthogonal to the opening surface of the replacement opening.
The shield part is formed with a through-hole penetrating toward the interlock switch,
The projector is characterized in that the lid is provided with an operating projection that protrudes inward through the through hole and presses the interlock switch to allow the power supply.

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