JP3512033B2 - projector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a light source device and an exterior case for accommodating the light source device, and a projector for forming a projected image by modulating and projecting a light beam emitted from the light source device. Regarding

[0002]

BACKGROUND ART It has been conventionally known to use a projector for presentations at conferences, academic conferences, exhibitions and the like. In a projector, a light flux emitted from a light source is modulated according to image information to form an optical image, and the optical image is enlarged and projected on a screen or the like. In recent years, the environment in which such projectors are used has been expanding, and in addition to being used for presentations at company meetings and business trips,
By capturing CAD / CAM / CAE data and enlarging and projecting it, it is used in technical study meetings in research and development departments, various seminars and workshops, and even in classes at schools that provide audiovisual education. . Further, it is also used for projecting medical images and data such as CT scan and MRI to be useful for studying treatment methods, medical guidance, etc., and effectively directing exhibitions and large-scale events.

As such a projector, there is known a projector which is provided with a light source device and an exterior case for accommodating the light source device, and which modulates a light beam emitted from the light source device and then enlarges and projects it to form a projected image. ing. The projector is provided with an opening corresponding to the position of the light source device so that the light source device can be taken out and replaced when the life of the light source device is reached. Usually, such an opening is closed by a lid part detachably provided in the outer case, and can be removed from the outer case when the light source device is replaced. The following is an example of such a lid. 1) Those placed on the bottom of the outer case. 2) It is arranged on the top surface side of the outer case and is detachably attached to the outer case by sliding along the top surface. In the case of such a lid part, the outer case has a notch serving as a guide for sliding the lid part from the top surface so that the lid part is slid with respect to the outer case so as to be removed from the outer case. It is formed over the side surface.

[0004]

However, the above-mentioned lid has the following problems. Since the lid of 1) is disposed on the bottom surface of the outer case, the projector must be turned over when the light source device is replaced. Therefore, after the replacement work is completed, it is necessary to adjust the attitude of the projector with respect to the screen again, which is a troublesome replacement work. Especially when a projector is used in an audiovisual room, etc.
With the ceiling surface and the bottom of the outer case facing each other,
Projectors are often mounted on the ceiling. Therefore, when replacing the light source device, the projector must be removed from the ceiling and then replaced, which is very troublesome.

On the other hand, in the slide type lid portion of 2), it is necessary to form a guide for sliding the lid portion by cutting out from the top surface to the side surface of the outer case. For this reason, there is a risk of interfering with other configurations arranged on the side surface of the exterior case (for example, an exhaust port for exhausting exhaust air from the cooling fan to the outside, a handle used when carrying the projector, etc.). However, there is a problem that the degree of freedom in design is reduced. Further, since the notch is formed from the top surface to the side surface of the outer case, there is a problem in that it is not preferable in appearance.

An object of the present invention is to provide a projector which can simplify the work of replacing the light source device, improve the degree of freedom in design, and have a good appearance.

[0007]

A projector according to the present invention comprises a light source device and an exterior case for accommodating the light source device, and modulates a light beam emitted from the light source device and then enlarges and projects the projected image. A projector that forms a light source device, and an opening that is arranged corresponding to the position of the light source device and that is formed only on the top surface of the outer case; and that the opening is closed and arranged only on the top surface of the outer case. A lid part detachably provided on the outer case, and a first part for engaging the lid part with the outer case
Engaging structure and second engaging structure, and engagement of the second engaging structure
A first urging hand that urges the lid so as to release the state
When the step and the engagement state of the second engagement structure are released,
With the lid part open, lock it to the outer case.
Locking part, the engagement state of the first engagement structure, and the locking
Second biasing means for biasing so as to maintain the locked state of the portion
And is provided.

According to this invention, since the lid is arranged on the top surface of the outer case, when the light source device is replaced, the top surface of the projector is directed upward (that is, the projector is mounted on the table). It is possible to perform replacement work with the projector placed in a state where the projector is normally used), and it is not necessary to turn over the projector unlike the conventional case. For this reason, it is not necessary to readjust the posture and position of the projector after replacing the light source device, so that the replacement work of the light source device can be simplified. Further, even when the projector is attached to the ceiling, the lid can be removed from the top surface facing downward, so that it is not necessary to remove the projector from the ceiling, and the light source device can be easily replaced. Further, since the lid portion is arranged only on the top surface of the outer case, another configuration arranged on the side surface of the outer case (for example, an exhaust port for discharging the exhaust air from the cooling fan to the outside or a projector is carried around. It does not interfere with the handle etc. used at the time. Therefore, the degree of freedom in design can be improved. Further, since the lid portion is arranged only on the top surface of the outer case and does not cover the side surface, the appearance can be improved. In addition, the lid is slightly open
Since the state can be maintained by the locking part,
The lid does not come off at the same time when the engagement state of is released.
Yes. This allows the projector to be mounted on the ceiling
When removing the lid, operate the operation part at the same time
The lid will not fall off, and the lid will be damaged due to the fall.
Can be prevented.

[0009] In the projector of the present invention, it is desirable to provide an operating unit for releasing the engagement of the first engagement structure of the lid on the installation has been operated to the outer case. In a conventional projector, the lid is generally screwed to an outer case. For this reason, when removing the lid part from the outer case, there is a problem that it is very troublesome because the work of turning and removing the plurality of screws is involved. In the present invention,
Since the lid is attached by engaging with the outer case, and the operating portion for releasing the engagement state of the lid with the outer case of the first engaging structure is provided, the operation of the operating portion allows the lid to be engaged. The general condition can be released. In other words, the lid can be removed from the outer case with one touch, so that the replacement work of the light source device can be further simplified.

In the projector of the present invention, the first engagement
It is preferable that the structure and the second engagement structure are arranged on the inner side of the outer case, and the operation portion is arranged apart from the lid portion. In this way, since the first engagement structure and the second engagement structure between the lid and the outer case are arranged on the inner side of the outer case and the operation portion is arranged at a position apart from the lid, it is exposed to the outside. It is not necessary to form a notch or the like for forming the engagement structure or the operation portion on the outer surface of the lid portion to be formed. Therefore, the gap between the outer surface of the lid portion exposed to the outside and the outer surface of the outer case can be minimized, light leakage of the light source device from the gap can be prevented, and the appearance can be improved.

In the projector of the present invention, it is desirable that the operation portion is arranged at a position recessed inside the outer case. In this way, since the operation unit is arranged in the recessed position on the inner side of the outer case, it is possible to prevent accidental operation by touching the operation unit according to the present invention when carrying or operating the projector. It is possible to prevent the lid part from unexpectedly dropping due to erroneous operation. The operation unit may be, for example, a mechanical operation switch that uses a movable unit that can release the engagement structure, an electric operation switch that controls an electrically movable unit that releases the engagement structure, or the like. Further, the present invention is not limited to such an operation switch, and other forms may be used as long as the engagement state between the lid portion and the outer case can be released by an external operation.

In the projector of the present invention, the first engagement
The structure and the second engagement structure are provided on the lid portion and include a first engagement portion and a second engagement portion that are inserted into the outer case and engaged with each other. It is preferable that the portion is inserted into the exterior case along a direction substantially parallel to the top surface, and the second engaging portion is inserted into the exterior case along a direction substantially orthogonal to the top surface. In this way, since the lid is provided with the first engaging portion and the second engaging portion that are inserted into the outer case in different directions, the lid is less likely to come off the outer case,
The lid can be securely attached to the outer case.

In the projector of the present invention, the first urging means
It is preferable that the means biases the lid portion in a direction opposite to a direction in which the second engaging portion of the lid portion is inserted into the exterior case. In this way, the first urging means for urging the lid portion in the direction in which the second engaging portion is removed from the outer case is provided, so that the operating portion releases the engaged state of the second engaging portion. The second engaging portion can be pushed out in the direction of coming out of the outer case, the lid portion can be easily removed from the outer case, and the lid portion can be easily removed.

In the projector of the present invention, a shield is provided to cover the inner surface of the outer case and the inner surface of the lid, respectively, and the first urging means is made of metal, and the lid is attached to the outer case. When attached, it is desirable that one end of the first urging means contacts the shield that covers the inner surface of the outer case and the other end contacts the shield that covers the inner surface of the lid portion. Thus, since the shield that covers the inner surface of the outer case and the shield that covers the inner surface of the lid are provided and these shields are electrically connected by the first urging means, the electromagnetic noise leakage from the inside of the outer case to the outside is prevented. Can be prevented. Further, since the first urging means has both the role of urging the lid portion in the predetermined direction and the role of electrically connecting the shields, the number of parts can be reduced.

[0015]

In the projector of the present invention, the outer case is provided with a detecting means for detecting the attachment / detachment state of the lid part to / from the outer case, and the detecting means is operated by the locking part of the lid part. It is desirable to be done. With this configuration, the detection means for detecting the attachment / detachment state of the lid to / from the outer case is provided, and since the operation of the detection means is performed by the locking portion of the lid, the lid is used for operating the detection means. It is not necessary to provide a separate member for the part, and the number of parts can be reduced. Further, since the detection means for detecting the attachment / detachment state of the lid to the outer case is provided, it is possible to prevent forgetting to attach the lid to the outer case.

In the projector of the present invention, the second urging means
Means, in the insertion direction with respect to the outer casing of the first engaging portion of the lid portion, it is desirable that urges the lid. With this configuration, since the second urging means for urging the lid portion in the direction of inserting the first engaging portion into the outer case is provided, the operating portion releases the engaged state of the second engaging portion. However, the first engaging portion is designed not to fall off from the outer case. Therefore, the lid portion does not come off at the same time when the engagement state of the lid portion is released by the operation portion, and when the projector is mounted on the ceiling, damage to the lid portion due to dropping or the like can be prevented.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. [1. Main Configuration of Projector] FIG. 1 is an overall perspective view of a projector 1 according to the present embodiment as seen from above, and FIG.
FIG. 3 is an overall perspective view of the projector 1 as seen from below, and FIGS. 3 to 5 are perspective views showing the inside of the projector 1. Specifically, FIG. 3 is a view in which the upper case 21 of the projector 1 is removed from the state of FIG. 1, and FIG. 4 is a rear side in which the shield plate 80, the driver board 90, and the upper light guide 472 are removed from the state of FIG. Figure seen from Figure 5,
It is the figure which removed the optical unit 4 from the state of FIG. These parts 4, 21, 80, 9 that make up the projector
Details of 0 and 472 will be described below.

1 to 3, the projector 1
Includes an outer case 2, a power supply unit 3 housed in the outer case 2, and a planar U-shaped optical unit 4 also arranged in the outer case 2, and has a substantially rectangular parallelepiped shape as a whole. The outer case 2 includes an upper case 21, a lower case 23, and an interface cover 22, which are made of resin. The interface cover 22 is arranged on the back side of the projector 1. In addition, the upper case 21 and the lower case 2
3 and the interface cover need not be made of resin, but may be made of another material. For example, it may be a metal such as magnesium, aluminum, or an alloy containing them.

The upper case 21 is a top surface portion 21 which constitutes the top surface, front surface, and side surface of the projector 1, respectively.
1, a front surface portion 213, and a side surface portion 212 are included. A lamp cover 61 as a lid is provided on the front side of the upper surface portion 211 so as to be detachable by fitting, and at a position apart from the lamp cover 61, an operation switch unit as an operation unit for unlocking the lamp cover 61. 652 is provided. Here, the operation switch unit 6
52 is disposed inside the outer case 2, and is provided with a switch hole 621 formed in the upper case 21.
It can be operated from outside. The mounting structure of the lamp cover 61 to the upper case 21 will be described later in detail. Further, in the upper case 21, a cutout portion 21A is formed on the side of the lamp cover 61 from the upper surface portion 211 to the front surface portion 213, and the projection lens 46 is arranged correspondingly. Here, the projection lens 46 has the cutout portion 21 with its upper surface exposed.
The projection lens 46 is located at A, and zooming and focusing operations of the projection lens 46 can be manually performed via a lever.

On the front side of the projector 1 as described above, on the side opposite to the side on which the projection lens 46 (cutout 21A) is provided, an exhaust port 212B located on the front side of the internal power supply unit 3 is provided. There is. Also, this exhaust port 2
12B includes a direction in which the cooling air deviates from the image projection area,
That is, an exhaust louver 26 is provided which also exhausts air to the left side in FIG. Further, in the upper surface portion 211 of the upper case 21, an operation panel 25 is provided on the rear side of the cutout portion 21A.

The lower case 23 is a bottom surface portion 23 which constitutes a bottom surface, a side surface, and a back surface of the projector 1, respectively.
1, the side surface portion 232, and the back surface portion 233 are included. A first attitude adjusting mechanism 27 that adjusts the tilt of the projector 1 in the front-rear direction to position the projected image is provided on the front side of the bottom surface portion 231. Also,
A second attitude adjusting mechanism 28 that adjusts the inclination of the projector 1 in the left-right direction that is substantially orthogonal to the front-rear direction is provided in one corner on the rear side of the bottom surface 231, and the position is adjusted in the other corner. Although not possible, a rear foot 231A corresponding to the second posture adjusting mechanism 28 is provided. Further, the bottom surface portion 231 is provided with a cooling air intake port 231B. An attachment portion 232A for rotatably attaching the U-shaped handle 29 is provided on the one side surface portion 232.

On one side surface side of the exterior case 2 as described above, the upper case 21 and the lower case 23 are provided.
Each side surface 212, 232 is provided with a side foot 2A (FIG. 2) that serves as a foot when the projector 1 is set up with the handle 29 facing upward. Also, the outer case 2
An interface portion 2B, which is a concave portion extending over the interface cover 22 and the rear portion 233 of the lower case 23, is provided on the back side of the, and the inside of the interface portion 2B is provided with various connectors (not shown). An interface board is arranged. A speaker hole 2C and an intake port 2D are provided on both left and right sides of the interface section 2B so as to straddle the interface cover 22 and the rear section 233 of the lower case 23. Of these, the intake port 2D is located on the rear side of the internal power supply unit 3.

As shown in FIG. 4, the power supply unit 3 is composed of a power supply 31 and a lamp drive circuit (ballast) 32 arranged on the side of the power supply 31. The power supply 31 supplies the power supplied through the power cable to the lamp drive circuit 3
2 and the driver board 90 (FIG. 3) and the like, and is provided with an inlet connector 33 (FIG. 2) into which the power cable is inserted. Lamp drive circuit 32
Supplies power to the light source lamp 411 of the optical unit 4.

As shown in FIGS. 4, 6 and 7, the optical unit 4 is a unit for optically processing the light flux emitted from the light source lamp 411 to form an optical image corresponding to image information. , An integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an electro-optical device 44, and a cross dichroic prism 45 as a color combining optical system.
(FIG. 7), and a projection lens 46 as a projection optical system.

The power supply unit 3 and the optical unit 4 are covered with a shield plate 80 (FIGS. 3 and 5) made of aluminum around the upper and lower sides, whereby electromagnetic noise from the power supply unit 3 and the like to the outside is covered. To prevent leaks.

[2. Detailed Configuration of Optical System] In FIGS. 4 and 7, the integrator illumination optical system 41 is an image of three liquid crystal panels 441 (shown as liquid crystal panels 441R, 441G, and 441B for red, green, and blue color lights, respectively). It is an optical system for illuminating the formation area substantially uniformly, and includes a light source device 413, a first lens array 418, a second lens array 414, a polarization conversion element 415, a first condenser lens 416, and a reflection mirror 424. And a second condenser lens 419.

Of these, the light source device 413 is a light source lamp 411 as a radiation light source for emitting a radial ray.
And a reflector 412 that reflects the radiated light emitted from the light source lamp 411. A halogen lamp, a metal halide lamp, or a high-pressure mercury lamp is often used as the light source lamp 411. A parabolic mirror is used as the reflector 412. In addition to a parabolic mirror, an ellipsoidal mirror may be used together with a collimating lens (concave lens).

The first lens array 418 has a structure in which small lenses having a substantially rectangular contour when viewed in the optical axis direction are arranged in a matrix. Each small lens splits the light flux emitted from the light source lamp 411 into a plurality of partial light fluxes. The contour shape of each small lens is the liquid crystal panel 44.
It is set so as to be substantially similar to the shape of the first image forming area. For example, if the aspect ratio (ratio of horizontal and vertical dimensions) of the image forming area of the liquid crystal panel 441 is 4: 3, the aspect ratio of each small lens is also set to 4: 3.

The second lens array 414 has substantially the same structure as the first lens array 418, and has a structure in which small lenses are arranged in a matrix. The second lens array 414, together with the first condenser lens 416 and the second condenser lens 419, has a function of forming an image of each small lens of the first lens array 418 on the liquid crystal panel 441.

The polarization conversion element 415 is arranged between the second lens array 414 and the first condenser lens 416, and is unitized with the second lens array 414. Such a polarization conversion element 415 has a second
The light from the lens array 414 is converted into one type of polarized light, which improves the utilization efficiency of light in the electro-optical device 44.

More specifically, the polarization conversion element 415 sets 1
The respective partial lights converted into the polarized light of the types are finally passed through the first condenser lens 416 and the second condenser lens 419, and finally the liquid crystal panels 441R, 4 of the electro-optical device 44.
It is almost superimposed on 41G and 441B. Since a projector using a liquid crystal panel of a type that modulates polarized light can use only one type of polarized light, almost half of the light from the light source lamp 411 that emits randomly polarized light is not used. Therefore, in the projector 1 of the present embodiment, by using the polarization conversion element 415, the light source lamp 411
The emitted light from all is converted into one type of polarized light, and the light utilization efficiency in the electro-optical device 44 is improved. Such a polarization conversion element 415 is disclosed in, for example, Japanese Patent Laid-Open No. 8-304.
No. 739 is introduced.

The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423. The dichroic mirrors 421 and 422 divide a plurality of partial luminous fluxes emitted from the integrator illumination optical system 41 into red and green. , And has a function of separating into three color lights of blue.

The relay optical system 43 includes an incident side lens 43.
1, relay lens 433, and reflection mirrors 432, 4
34, and has a function of guiding the color light and blue light separated by the color separation optical system 42 to the liquid crystal panel 441B.

At this time, in the dichroic mirror 421 of the color separation optical system 42, the blue light component and the green light component of the luminous flux emitted from the integrator illumination optical system 41 are transmitted and the red light component is reflected. The red light reflected by the dichroic mirror 421 is reflected by the reflection mirror 42.
The light is reflected at 3 and passes through the field lens 417 to reach the red liquid crystal panel 441R. This field lens 4
Reference numeral 17 converts each partial light flux emitted from the second lens array 414 into a light flux parallel to the central axis (chief ray) thereof. The same applies to the field lens 417 provided on the light incident side of the other liquid crystal panels 441G and 441B.

Of the blue light and the green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422 and passes through the field lens 417 to reach the liquid crystal panel 441G for green. On the other hand, the blue light passes through the dichroic mirror 422, passes through the relay optical system 43, and further passes through the field lens 417 to reach the liquid crystal panel 441B for blue light. The reason why the relay optical system 43 is used for blue light is that the optical path length of blue light is longer than the optical path lengths of other color lights, so that reduction in light utilization efficiency due to light diffusion or the like is prevented. This is because. That is, the partial light flux that has entered the incident side lens 431 is directly transmitted to the field lens 417.

The electro-optical device 44 includes liquid crystal panels 441R, 441G and 441B which are three light modulators,
These use, for example, a polysilicon TFT as a switching element, and the respective color lights separated by the color separation optical system 42 are supplied to these three liquid crystal panels 441R, 441.
41G, 441B modulates according to image information to form an optical image.

The cross dichroic prism 45 has three
A color image is formed by synthesizing images modulated by a single liquid crystal panel. In the cross dichroic prism 45, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a substantially X shape along the interfaces of the four rectangular prisms. Three color lights are combined by the dielectric multilayer film. The color image combined by the prism 45 is projected by the projection lens 46.
And is enlarged and projected on the screen.

As shown in FIGS. 4 and 6, each of the optical systems 41 to 45 described above is housed in a light guide 47 as a housing for optical parts made of synthetic resin. The light guide 47 includes the above-mentioned optical components 414 to 419, 4
Lower light guide 47 provided with groove portions into which 21 to 424 and 431 to 434 are slidably fitted from above, respectively.
1 and a lid-shaped upper light guide 472 that closes the upper opening side of the lower light guide 471. A head portion 49 is formed on the light emitting side of the light guide 47. The projection lens 46 is provided on the front side of the head section 49.
Is fixed, and liquid crystal panels 441R, 441G, and
The prism 45 to which 441B is attached is fixed.

[3. Cooling Structure] In the projector 1 according to the present embodiment, a panel cooling system A that mainly cools the liquid crystal panels 441R, 441G, and 441B, a lamp cooling system B that mainly cools the light source lamp 411, and a power source 31 are mainly cooled. A power supply cooling system C is provided.

In FIGS. 2, 4, and 5, the panel cooling system A uses a pair of sirocco fans 51 and 52 arranged on both sides of the projection lens 46. The cooling air sucked from the intake ports 231B on the lower surface by the sirocco fans 51, 52 is the liquid crystal panels 441R, 441G, 44.
After cooling 1B from the lower side to the upper side, while cooling the lower surface of the driver board 90 (FIG. 3), the driver board 90 is brought closer to the axial exhaust fan 53 side in the front corner and the front side exhaust port 212B.
Exhausted from.

In FIGS. 4 to 6, the lamp cooling system B is used.
In, a sirocco fan 54 provided on the lower surface of the optical unit 4 is used. The cooling air in the projector 1 attracted by the sirocco fan 54 enters into the light guide 47 through an opening (not shown) provided in the upper light guide 472, and the space between the second lens array 414 and the polarization conversion element 415 which are unitized. After cooling through these, they are discharged from the exhaust side opening 471A of the lower light guide 471, sucked by the sirocco fan 54, and discharged. The discharged cooling air is supplied to the light guide 47 from the intake side opening 471B of the lower light guide 471 again.
Enter the light source device 413 and enter the light source lamp 4
11 is cooled, and thereafter, it exits from the light guide 47 and is exhausted from the exhaust port 212B by the axial exhaust fan 53.

In FIG. 4, in the power supply cooling system C, the power supply 3
The axial-flow intake fan 55 provided in the rear of 1 is used. The cooling air sucked from the rear side intake port 2D by the axial flow intake fan 55 cools the power supply 31 and the lamp drive circuit 32, and then is exhausted by the axial flow exhaust fan 53 like the other cooling systems A and B. The air is exhausted from the mouth 212B.

[4. Mounting Structure of Lamp Cover] FIG. 8 shows the projector 1 with the lamp cover 61 removed from the outer case 2. Lamp cover 61
Is a lid that closes the opening 63 formed on the front side of the upper surface portion 211 of the upper case 21, and is formed in a substantially rectangular shape in a plane. The opening 63 is arranged immediately above the light source device 413, and the light source device 413 can be attached to and detached from the projector 1 through the opening 63.

The outer surface 61A of the lamp cover 61 is substantially flush with the upper surface portion 211 of the upper case 21 when the lamp cover 61 is attached to the upper case 21 (see FIG. 1). It is formed into a smooth flat surface according to the shape.

The inner surface 61B of the lamp cover 61 is shown in FIG.
As shown in FIG. 5, a plurality (two in this embodiment) of first engaging portions 611 and a plurality (two in this embodiment) of second engaging portions 612 that are inserted into and engaged with the upper case 21.
And a locking portion 613 which is locked to the upper case 21 with the lamp cover 61 slightly opened, and the locking portion 613.
And a projecting portion 615 arranged in the vicinity of.
The two first engaging portions 611 are provided along the inner side edge 61C of the lamp cover 61 arranged on the inner side (the rear side of the projector 1) when the lamp cover 61 is attached to the upper case 21. Has been. These first engaging portions 6
11 are arranged on both end sides of the inner edge 61C,
It projects from the lamp cover 61 toward the rear side of the projector 1 in a substantially horizontal direction.

The two second engaging portions 612 are the same as the first engaging portion 6
It is provided along the front side edge 61D that faces the back side edge 61C of the lamp cover 61 in which 11 is arranged. The second engaging portions 612 are arranged on both ends of the front side edge 61D, and project downward from the lamp cover 61. The second engaging portion 612 is formed in a substantially hook shape and has a claw portion 612A that engages with the upper case 21 side.

The locking portion 613 is arranged near the second engaging portion 612 and is provided so as to project downward from the lamp cover 61. Further, the locking portion 613 is formed in a substantially hook shape, and the upper case 21
It has a claw portion 613A engaging with the side. Protrusion 615
Is provided so as to project downward from the lamp cover 61. The first engaging portion 611, the second engaging portion 612, the locking portion 613, and the protruding portion 615 are formed integrally with the lamp cover 61. Further, the lamp cover 61 has a shield plate 61 for covering the inner surface 61B thereof.
4 are provided.

Returning to FIG. 8, in the step portion 64 around the opening 63 of the upper case 21, the outer surface of the upper surface portion 211 is cut out into a substantially rectangular shape (shape corresponding to the planar shape of the lamp cover 61). It is one step lower than the outer surface, and when the lamp cover 61 is attached to the outer case 2, the upper surface of the step portion 64 causes the lamp cover 6 to fall.
The peripheral edge of 1 will be supported. Here, the step portion 6
4 is formed only on the upper surface portion 211 of the upper case 21, and is not formed on the front surface portion 213 or the side surface portion 212.

In the stepped portion 64, the first engagement portion hole 641 into which the first engagement portion 611 of the lamp cover 61 is inserted and one of the two second engagement portions 612 (see FIG. 9
The second engaging portion hole 642 into which the second engaging portion 612 on the middle right side is inserted and the other of the two second engaging portions 612 (the second engaging portion 612 on the left side in FIG. 9) are A second engaging portion cutout portion 644 to be inserted and an engaging portion hole 643 into which the engaging portion 613 is inserted are formed. Of these, the first engagement portion hole 641 has an upper rear side above the upper case 21.
It is formed so as to be covered with. The first of these
The engaging portion hole 641, the second engaging portion hole 642, the second engaging portion cutout portion 644, and the locking portion hole 643 are the first engaging portion 611 and the second engaging portion of the lamp cover 61. Junction 612,
And the engaging portions 613 are arranged corresponding to the respective positions.

Inside the upper case 21, a stepped portion 64 is provided with a rod-shaped lock lever 65 and a pair of metal leaf springs 66, as shown in FIG. Here, FIG. 11 shows a state in which the lock lever 65 and the leaf spring 66 are removed from the state of FIG. In FIG. 11, groove portions 642A and 644A are formed in a part of the second engagement portion hole 642 of the step portion 64 and a part of the second engagement portion cutout portion 644, respectively. The longitudinal direction of these groove portions 642A and 644A is along the direction of the front side edge 61D of the lamp cover 61 described above. The lock lever 65 described above is provided with these groove portions 642A, 6
It is adapted to be attached to the upper case 21 while being supported by 44A. Further, the step portion 64 is formed with a spring mounting portion 646 to which a pair of leaf springs 66 are attached, and the spring exposing hole 6 for exposing one end of the leaf spring 66 from the inside of the upper case 21 to the outside.
47 is formed. Further, on the inner side of the upper case 21, a ridge 622 surrounding the periphery of the switch hole 621 is formed.

As shown in FIG. 12, the lock lever 65 includes the groove portions 642A, 64 of the upper case 21 described above.
4A, the claw portion 651 arranged along the longitudinal direction of the lock lever 65, and the operation switch portion 652 arranged corresponding to the position of the switch hole 621 of the upper case 21 described above. Have in one. The claw portion 651 engages with the claw portion 612A of the second engaging portion 612 of the lamp cover 61 when the lamp cover 61 is attached to the outer case 2, and the second engaging portion 612 of the lamp cover 61. Is provided in a number corresponding to the number of two, and two are provided in the present embodiment. In this claw portion 651,
An inclined surface 651A facing upward is formed. Also,
The groove 64 of the upper case 21 is provided below the claw 651.
2A, 644A, and the groove 64
A sliding portion 655 is provided slidably on 2A and 644A.

On the upper surface of the operation switch section 652, a recess 652A that opens upward is formed. The operation switch portion 652 is arranged in the protruding portion 622 of the upper case 21, and is movable in the protruding portion 622 along the longitudinal direction. Further, the switch hole 621 of the upper case 21 allows the operation switch section 6
The recess 652A of 52 is exposed to the outside. That is, the operation switch portion 652 is the upper surface portion 2 of the upper case 21.
It is arranged at a position recessed from the outer surface of 11 to the inner side.

To attach such a lock lever 65 to the upper case 21, first, from the inside of the upper case 21, the two claw portions 6 of the lock lever 65 are inserted.
51 are inserted into the second engagement portion hole 642 and the second engagement portion cutout portion 644 of the upper case 21, respectively. After this, the lock lever 65 is moved to the groove portions 642A, 644.
The sliding portion 655 is moved to the A side, and the sliding portion 655 is arranged in the groove portions 642A and 644A of the upper case 21. As a result, the claw portion 651 of the lock lever 65 has the groove portions 642A and 644A.
It is arranged on the upper side and supported by the upper case 21, as shown in FIG.
As shown in FIG.
Will be attached to. Receiving portions 656 are provided on both side surfaces of the sliding portion 655 of the lock lever 65, and when the lock lever 65 is attached to the upper case 21, the receiving portion 656 and the claw portion 651 serve as the upper case 21. Will be sandwiched. This prevents the lock lever 65 from coming off the upper case 21 even when the projector 1 is turned over.

The lock lever 65 has one end fixed to the upper case 21 and the other end attached to a spring receiving portion 653 formed at one end of the lock lever 65 (end portion provided with the operation switch portion 652). By the spring 67, along the longitudinal direction, from the right side to the left side in FIG.
It is urged from the middle left side to the right side). here,
The inclined surface 651 of the claw portion 651 of the lock lever 65 described above.
A is inclined downward in the biasing direction of the lock lever 65. It should be noted that the sliding portion 655 of the lock lever 65 is moved by the biasing force of the compression spring 67 into the groove portions 642A, 644.
In order to prevent the lock lever 65 from coming off, a stopper portion 654 (see FIG. 12) that limits the sliding range of the lock lever 65 is formed. As a result, when the lock lever 65 slides by a predetermined amount,
The stopper portion 654 is the ridge portion 62 of the upper case 21.
The sliding range of the lock lever 65 is restricted by contacting the second position.

Returning to FIG. 10, the pair of leaf springs 66 attached to the inside of the upper case 21 are attached to the spring attaching portion 646 at substantially the centers thereof. Leaf spring 6
One side 66 </ b> A of 6 extends in a substantially horizontal direction, its tip is curved in a substantially inverted U shape, and the curved portion is a spring exposing hole 647.
Is exposed to the outside. Here, the protrusion 615 of the lamp cover 61 described above is provided with a spring exposing hole 647 from above.
The plate spring 66 can be inserted into the inside of the plate spring 66, and can come into contact with the side surface of the curved portion of the one side 66A of the leaf spring 66. The other side 66B of the leaf spring 66 extends substantially obliquely downward,
The tip is curved in a substantially U shape. This curved portion is in contact with the shield plate 80 that covers the inner surface of the outer case 2, as shown in FIG. Here, FIG. 13 shows the lamp cover 61 when the lamp cover 61 is attached to the outer case 2, and the shield plate 80 of the outer case 2.
And a leaf spring 66 arranged between the lamp cover 61 and the shield plate 80 of the outer case 2. Note that FIG. 13 is a diagram showing a state in which the outer case 2 is not shown. As shown in FIG. 13, when the lamp cover 61 is attached to the outer case 2, the leaf spring 6 is
6, one end 66A of the lamp cover 61 is in contact with the shield plate 614 of the lamp cover 61, and the other end 66B is in contact with the shield plate 80 of the outer case 2, and the shield plate 614 of the lamp cover 61 and the outer case 2 are in contact with each other. The shield plate 80
It is electrically connected by the leaf spring 66.

Here, the projector 1 is provided with a cover sensor 68 (FIGS. 3 and 13) as a detection means for detecting the attachment / detachment state of the lamp cover 61 to / from the outer case 2. The cover sensor 68 has, for example, a function of a switch for connecting / disconnecting an electric circuit electrically connecting the lamp driving circuit 32 of the power supply unit 3 and the light source device 413. It is attached inside the exterior case 2 as described above, and when the lamp cover 61 is attached to the exterior case 2, the lamp cover 61 is installed at a position directly below the locking portion 613.

In such a cover sensor 68, when the lamp cover 61 is attached to the outer case 2,
An elastically deformable metal lever 681 of the cover sensor 68
(FIG. 3) is pushed down by the tip of the locking portion 613, and the electric circuit between the lamp drive circuit 32 and the light source device 413 described above is connected. As a result, the light source lamp 411 of the light source device 413 can be turned on. On the other hand, when the lamp cover 61 is removed from the outer case 2, or when the lamp cover 61 is not securely attached to the outer case 2, the metal lever 681 of the cover sensor 68 causes the lamp cover 61 to move. Since it cannot be pushed down by the stopper 613, or cannot be pushed down sufficiently,
The electric circuit between the lamp drive circuit 32 and the light source device 413 described above is cut off. As a result, the light source lamp 411 of the light source device 413 cannot be lit. With such a cover sensor 68, if the lamp cover 61 is forgotten to be attached to the outer case 2 or the attachment state is incomplete, the light source lamp 411 cannot be turned on. Will be able to prevent.

Next, the lamp cover 6 in the present embodiment.
How to attach and detach 1 to the outer case 2 will be described. (How to install the lamp cover) First, the lamp cover 61
The first engaging portion 611 of the first engaging portion 611 of the upper case 21 in an oblique direction from the front side to the rear side from above.
Insert inside. Next, using the first engaging portion 611 of the lamp cover 61 as a fulcrum, the front side edge 6 of the lamp cover 61 is
The 1D side is lowered, and the claw portion 612A of the second engagement portion 612 is brought into contact with the inclined surface 651A of the claw portion 651 of the lock lever 65. From here, when the front side edge 61D side of the lamp cover 61 is further lowered, the second engaging portion 612 presses the inclined surface 651A of the claw portion 651 of the lock lever 65,
Due to the inclination of the inclined surface 651A, the lock lever 65 is allowed by the compression spring 67 and slides along the longitudinal direction from the right side to the left side in FIG. As a result, the lamp cover 6
It is possible to further lower the front side edge 61D side of 1. Further, further, the front side edge 6 of the lamp cover 61 is
When the 1D side is lowered and the pawl portion 612A of the second engaging portion 612 of the lamp cover 61 comes below the position of the pawl portion 651 of the lock lever 65, the inclined surface 651A of the pawl portion 651 of the lock lever 65 is pressed. Since there is nothing to do, the lock lever 65 is biased by the compression spring 67 and returns to its original position. As a result, the second engaging portion 612 of the lamp cover 61.
The claw portion 612A of the lock lever 65 is engaged with the claw portion 651 of the lock lever 65, and the lamp cover 61 is attached to the upper case 21.

In this way, with the lamp cover 61 attached to the upper case 21, the lamp cover 6
As shown in FIG. 14, the first first engaging portion 611 is housed in the first engaging portion hole 641 of the upper case 21, and the upper surface of the first engaging portion 611 is of the first engaging portion hole 641. It is covered by a portion of the upper case 21 that covers the upper side, and the first engagement portion 611 is also in a state of being engaged with the upper case 21. Therefore, the lamp cover 61 is attached to the outer case 2 by the engagement of the four first engaging portions 611 and the two second engaging portions 612, that is, the total of four engaging portions 611 and 612 with the upper case 21. It is installed. Further, when the lamp cover 61 is attached to the outer case 2, as described above, the shield plate 614 of the lamp cover 61 and the shield plate 80 of the outer case 2 are electrically connected by the leaf spring 66. It is in. Here, the one side 66 </ b> A of the leaf spring 66 is attached to the inner surface 61 of the lamp cover 61.
It is pressed by B and is elastically deformed downward. The protrusion 615 of the lamp cover 61 is in a state of being inserted into the spring exposing hole 647 of the upper case 61.

(How to remove the lamp cover) First, in the switch hole 621 formed in the upper case 21,
The tip of the thin rod member P (see the chain double-dashed line in FIG. 8) is inserted, and the recess 6 of the operation switch portion 652 of the lock lever 65 is inserted.
Insert into 52A. In this state, the thin rod member P is moved from the right side to the left side in FIG. As a result, the compression spring 67 allows the lock lever 65 to slide from the right side to the left side in FIG. 8, and thus the claw portion 651 of the lock lever 65 and the claw portion 612A of the second engaging portion 612 of the lamp cover 61. Disengages with.

Then, the one side 66A of the leaf spring 66 tries to return to the original position by the amount of elastic deformation, so that the lamp spring 61 is urged upward by the leaf spring 66. As a result, as shown in FIG. 15, the front side edge 61D side of the lamp cover 61 is slightly lifted with the first engaging portion 611 as a fulcrum, and the lamp cover 61 is slightly opened. That is, the one side 66A of the leaf spring 66 has a function of urging the lamp cover 61 in a direction opposite to the insertion direction of the second engaging portion 602 of the lamp cover 61 into the upper case 21. That is, one side 66A of the leaf spring 66 is the first urging means of the present invention. As described above, when the lamp cover 61 is slightly open, the locking portion 613 is not attached to the upper case 21.
The first engaging portion 611 is engaged with the peripheral portion of the engaging portion hole 643 and the first engaging portion 611 is engaged with the first engaging portion hole 641 of the upper case 21. Moreover, the lamp cover 61 is urged by the leaf spring 66 in the inserting direction of the first engaging portion 611 into the upper case 21. Specifically, the protruding portion 615 of the lamp cover 61 is moved from the left side to the right side in FIG. 15 by the side surface of the curved portion of the one side 66A of the leaf spring 66, that is, the first engaging portion of the lamp cover 61. 611 is the upper case 21
Is urged in the insertion direction into the first engaging portion hole 641. Accordingly, the first engaging portion 611 of the lamp cover 61
And the engagement state with the first engagement portion hole 641 of the upper case 21 can be maintained. Therefore, for example, when the projector 1 is mounted on the ceiling and the upper surface 2
Even when 11 is facing downward, the lamp cover 61
Will be able to maintain a slightly open state. That is, one side 66 </ b> A of the leaf spring 66 has a function of urging the lamp cover 61 in the insertion direction of the first engaging portion 601 of the lamp cover 61 with respect to the upper case 21. That is, one side 66A of the leaf spring 66 is the second urging means of the present invention. After that, by sliding the lamp cover 61 from the back side to the front side, the locking portion 61 of the lamp cover 61 is
3 can be removed from the locking portion hole 643 of the upper case 21, and the lamp cover 61 can be removed from the outer case 2.

According to this embodiment as described above, the following effects can be obtained. In the present embodiment, since the lamp cover 61 is arranged on the upper surface portion 211 of the upper case 21, when replacing the light source device 413, the replacement work is performed with the upper surface portion 211 of the projector 1 facing upward. Therefore, unlike the conventional case, it is not necessary to turn over the projector 1. Therefore, after replacing the light source device 413, readjustment of the posture and position of the projector 1 is not necessary, and the replacement work of the light source device 413 can be simplified. Also,
Even when the projector 1 is mounted on the ceiling, the lamp cover 61 can be removed from the downwardly facing upper surface portion 211, so that it is not necessary to remove the projector 1 from the ceiling, and the light source device 413 can be easily replaced. You can

In this embodiment, since the lamp cover 61 is arranged only on the upper surface portion 211 of the upper case 21, the exhaust port 2 formed in the front surface portion 213 of the upper case 21.
The degree of freedom in design can be improved without interfering with 12B or the like. Further, the lamp cover 61 is arranged only on the upper surface portion 211 of the upper case 21, and the front surface portion 213
Since it does not affect the appearance, the appearance can be improved.

The lamp cover 61 is attached by being engaged with the upper case 21, and the operation switch portion 652 is slid by the thin rod member P to release the engaged state of the lamp cover 61 with the upper case 21. Since the switch portion 652 is provided, the lamp cover 61 can be removed from the outer case 2 with one touch, and the replacement work of the light source device 413 can be further simplified.

In the engaging structure between the lamp cover 61 and the outer case 2, the first engaging portion 61 that constitutes the engaging structure.
1, the second engaging portion 612, the lock lever 65 and the like are arranged inside the outer case 2 and the lamp cover 61, and
Since the operation switch section 652 (switch hole 621) is arranged at a position apart from the lamp cover 61, the above-described engaging structure and operation switch section 652 are formed on the outer surface of the lamp cover 61 exposed to the outside. It is not necessary to form notches. Therefore, the outer surface 61A of the lamp cover 61 exposed to the outside and the upper surface portion 21 of the upper case 21 are exposed.
The gap between the outer surface of the light source device 413 and the outer surface of the light source device 1 can be minimized, light leakage of the light source device 413 from the gap can be prevented, and the appearance can be improved.

Operation switch portion 652 of the lock lever 65
Is arranged inside the outer case 2 and is exposed to the outside through the switch hole 621. Therefore, when carrying or operating the projector 1, the operation switch section 652 is erroneously touched and the lock lever is released. It is possible to prevent sliding of 65, and to prevent the unexpected fall of the lamp cover 61 due to an erroneous operation.

Since the lamp cover 61 is provided with the first engaging portion 611 and the second engaging portion 612 which are inserted into the upper case 21 in different directions, the lamp cover 61 can be prevented from coming off from the outer case 2. Therefore, the lamp cover 61 can be securely attached to the outer case 2. Further, since the four corners of the lamp cover 61 are attached to the outer case 2 with a total of four engaging portions of the two first engaging portions 611 and the two second engaging portions 612, it is necessary to attach the lamp cover 61 to the outer case 2. It can be made more reliable.

Since the plate spring 66 for biasing the lamp cover 61 in the direction in which the second engaging portion 612 of the lamp cover 61 comes out of the upper case 21, that is, the upward direction is provided, the operation switch portion 652 is slid to move the second engaging portion 612 to the second position. Engagement part 612
When the engagement state of the lamp cover 6 is released, the second engagement portion 612 can be pushed upward with the release.
1 can be easily detached from the upper case 21, and the lamp cover 61 can be easily removed.

The shield plate 80 of the outer case 2 and the shield plate 614 of the lamp cover 61 are provided, and the shield plates 80 and 614 are electrically connected by the leaf spring 66. It is possible to prevent electromagnetic noise leakage to the outside.

Since the lamp cover 61 is provided with the engaging portion 613, the lamp cover 61 can be maintained in a slightly opened state,
The lamp cover 61 does not come off from the outer case 2 at the same time when the operation switch section 652 is operated. Therefore,
When the projector 1 is installed on the ceiling, the lamp cover 61 does not come off at the same time when the operation switch section 652 is operated. Therefore, even if the lamp cover 61 is not held by hand, it is possible to prevent the lamp cover 61 from falling and facilitate workability.

In this embodiment, the cover sensor 6 for detecting the attachment / detachment state of the lamp cover 61 to / from the upper case 21.
8 is provided and the cover sensor 68 is operated by the locking portion 613 of the lamp cover 61, it is not necessary to provide another member to the lamp cover 61 to operate the cover sensor 68, and the number of parts can be reduced. . Further, since the cover sensor 68 is provided, the lamp cover 61
It is possible to prevent the user from forgetting to attach it to the outer case 2.

Since the lamp cover 61 is configured to be urged in the inserting direction of the first engaging portion 611 into the upper case 21 by the leaf spring 66, the operation switch portion 6
Even when the engagement state of the second engagement portion 612 is released by 52, the first engagement portion 611 does not fall off from the outer case 2. Therefore, with the operation switch unit 652,
When the lamp cover 61 is released from the engaged state and the lamp cover 61 does not come off at the same time, and the projector 1 is mounted on the ceiling, it is possible to prevent the lamp cover 61 from being damaged by being dropped.

Further, in this embodiment, the leaf spring 66 is used.
Has a role of urging the lamp cover 61 upward (a role of the first urging means of the present invention) and the shield plates 80, 61.
The number of parts can be reduced because it has three roles of electrically connecting four to each other and the role of the second urging means of the present invention.

The present invention is not limited to the above-described embodiment, and modifications and improvements within a range in which the object of the present invention can be achieved are included in the present invention. The detection means may be, for example, a detection means such that the laser light is interrupted by a locking portion when the lid is attached to the outer case. The lid is not limited to the stop portion, and may be provided with a dedicated member for operating the detection means.

The number of engaging portions is not limited to one, but a plurality of engaging portions may be provided, and three or more first engaging portions and two or more engaging portions may be provided. Further, only one first engaging portion may be provided, and in such a case, it is desirable that the first engaging portion is arranged long along the direction of the back side edge 61C of the lid portion. With this configuration, the back side edge 61C side of the lid can be stably engaged with the outer case.

The first urging means is not limited to one having both the role of urging the lid portion in the predetermined direction and the role of electrically connecting the shields to each other. May only play a role of urging
In such a case, a resin spring material or a rubber material can be used.

Further, the first urging means is not limited to the one composed of a part of the shield plate in the outer case or the elastic member of the detecting means, but other elastic members or the like are separately used. It may be one.

The first engaging portion and the second engaging portion of the lid portion are not limited to those inserted in different directions with respect to the outer case, and, for example, both of them are along a direction substantially orthogonal to the top surface. It may be inserted into the outer case, and such a case is also included in the present invention.

The operation section is not limited to the one arranged in the recessed position on the inner side of the outer case, but may be the one protruding from the outer surface of the outer case. Further, the mounting structure of the lid part to the outer case is not limited to the engaging structure arranged on the inner side of the outer case, and may be exposed to the outside, or by screwing or the like. Good.

The shield provided on the inner surface of the lamp cover and the outer case is not limited to the plate shape, but may be formed on the inner surface of the lamp cover and the inner surface of the outer case by vapor deposition.

The projector of the present invention is not limited to the one using a liquid crystal panel as the light modulating device, but may be, for example, one equipped with a plasma device or a light modulating device using a micromirror, or one that reflects incident light. While equipped with a reflection-type light modulator that modulates and emits light, a single plate type, two-sheet type,
Rear type can be adopted. In short, if the projector is a projector that modulates the light flux emitted from the light source lamp according to image information to form an optical image and magnifies and projects the optical image, this configuration and the like may be appropriately determined in implementation.

[0083]

According to the present invention, the light source device can be easily replaced, the degree of freedom in design can be improved, and the appearance can be improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a projector according to an embodiment of the present invention as seen from above.

FIG. 2 is an overall perspective view of the projector according to the embodiment as seen from below.

FIG. 3 is a perspective view showing a state in which an upper case is removed from the state of FIG.

FIG. 4 is a perspective view of the shield plate, the driver board, and the upper light guide removed from the state of FIG. 3 as viewed from the rear side.

5 is a perspective view showing a state in which the optical unit is removed from the state of FIG.

FIG. 6 is a perspective view of the optical unit in the above embodiment as seen from below.

FIG. 7 is a plan view schematically showing the optical unit in the embodiment.

FIG. 8 is a perspective view showing a mounting structure of the lamp cover in the embodiment.

FIG. 9 is a perspective view of the lamp cover in the above embodiment as seen from below.

FIG. 10 is a perspective view of the upper case with the lamp cover removed in the above embodiment as seen from the inside (with a lock lever and a leaf spring).

FIG. 11 is a perspective view of the upper case with the lamp cover removed according to the embodiment as seen from the inside (without a lock lever and a leaf spring).

FIG. 12 is a perspective view of the lock lever in the above embodiment as seen from above.

FIG. 13 is an enlarged perspective view for explaining the positional relationship between the lamp cover, the shield plate of the outer case, and the leaf spring in the above embodiment.

FIG. 14 is a perspective view of the upper case with the lamp cover attached according to the above embodiment as viewed from the inside.

FIG. 15 is a cross-sectional view showing a state where the lamp cover in the embodiment is slightly opened.

[Explanation of symbols] 1 projector 2 exterior case 61 Lamp cover that is the lid 61B inner surface 63 openings 66 Leaf Springs as First Biasing Means and Second Biasing Means 68 A cover sensor as a detection means 80 Shield plate (exterior case) 211 Top surface that is the top surface 413 light source device 611 First engaging portion 612 Second engaging portion 613 Locking part 614 Shield plate (cover) Operation switch section that is an operation section

Continuation of front page (56) Reference JP-A-11-237691 (JP, A) JP-A-2000-56396 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 21/00 -21/30

Claims (9)

(57) [Claims] 1. A projector, comprising: a light source device; and an outer case for housing the light source device, wherein the light beam emitted from the light source device is modulated and then enlarged and projected to form a projection image. An opening which is arranged corresponding to the position of the device and which is formed only on the top surface of the outer case, and which is arranged only on the top surface of the outer case while closing the opening and is detachably attached to the outer case. And a first engaging structure for engaging the lid with the exterior case, and
And a second engagement structure and the lid so as to release the engagement state of the second engagement structure.
The first biasing means for biasing the portion and the lid when the engagement state of the second engagement structure is released.
Locking to lock to the outer case with the part opened slightly
Parts and, engaged and locked state of the locking portion of the first engaging structure
And a second urging means for urging so as to maintain the projector. 2. The projector according to claim 1 , wherein the projector is installed in the exterior case and is operated by the first cover of the cover .
A projector, comprising: an operation section for releasing the engagement state of the engagement structure . 3. The projector according to claim 2, wherein the first engagement structure and the second engagement structure are arranged on an inner side of the outer case, and the operation section is provided from the lid section. A projector characterized by being arranged apart. 4. The projector according to claim 2, wherein the operation unit is arranged at a position recessed inside the exterior case. 5. The projector according to claim 2, wherein the first engagement structure and the second engagement structure are provided on the lid portion and are inserted into the outer case. The first engaging portion is configured to include a first engaging portion and a second engaging portion that are engaged with each other, and the first engaging portion is inserted into the exterior case along a direction substantially parallel to the top surface, The projector is characterized in that the engaging portion is inserted into the exterior case along a direction substantially orthogonal to the top surface. 6. The projector according to claim 5, wherein the first urging means attaches the lid portion in a direction opposite to a direction in which the second engaging portion of the lid portion is inserted into the exterior case. A projector that is characterized by a boost. 7. The projector according to claim 6, wherein a shield is provided to cover an inner surface of the outer case and an inner surface of the lid, and the first urging unit is made of metal. When attached to the outer case, the first urging means has one end in contact with the shield covering the inner surface of the outer case and the other end in contact with the shield covering the inner surface of the lid. 8. The projector according to claim 1 , wherein the exterior case is provided with a detection means for detecting a state of attachment / detachment of the lid part to / from the exterior case, and the detection means. Is operated by the locking portion of the lid portion. The projector according to any one of claims 9 claims 5 to 8, wherein the second biasing means, in the insertion direction with respect to the outer casing of the first engaging portion of the lid, the lid projector and wherein the biasing the part.