JP2002350978A - Housing for optical part and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing for an optical part and a projector by which the positioning and fixing of the optical part are simply performed and whose structures are simplified. SOLUTION: A pressing member 61 to press a contact surface 416B1 which is the outer peripheral part of a first condenser lens 416 to the side of a lower light guide 471 and to fix the first condenser lens 416 is integrally formed at an upper light guide 472 constituting the projector. Since the pressing member 61 is integrally formed at the upper light guide 472, the first condenser lens 416 is attached at a specified position at the inside of the light guide 47 only by attaching the upper light guide 472 and the lower light guide 471. Thus, the positioning and fixing of the first condenser lens 416 are easily attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for an optical component and a projector comprising the optical component and the housing for the optical component.

[0002]

BACKGROUND ART Conventionally, projectors have been frequently used as presentations at conferences, conferences, exhibitions, and the like.
Such a projector modulates a light beam emitted from a light source through various optical components in accordance with image information to form an optical image, and enlarges and projects the optical image on a screen or the like. In such a projector, in order to obtain a clearer projected image, the position of the optical component must be adjusted with high accuracy on the illumination optical axis of the emitted light beam. For this reason, in general, the upper light guide and the lower light guide form a light guide as one housing, and the optical component is fixed in the light guide to secure the accurate position of the optical component. are doing. Here, a specific mounting procedure will be described. First, optical components are stored in a holder formed in the lower light guide, and after adjusting the position with respect to the illumination optical axis, auxiliary members such as leaf springs and clips are mounted. Utilizing this, the optical component was positioned and fixed to the lower light guide. Next, a light guide as one housing was completed by covering with the upper light guide.

[0003]

However, when the optical parts are mounted in such a procedure, the position of the optical parts in the lower light guide is fixed and then the upper light guide is mounted. There is a problem that the operation, that is, the operation of positioning and fixing the optical components is complicated. In addition, an auxiliary member such as a leaf spring must be separately prepared, so that the number of members is increased and the structure of the light guide is complicated.

An object of the present invention is to provide an optical component housing and a projector that can simplify the positioning and fixing of the optical component and can simplify the structure.

[0005]

An optical component housing according to the present invention accommodates optical components such as lenses and mirrors, and positions and fixes the optical components on a predetermined illumination optical axis set therein. A housing for supporting the optical component, and a housing for the optical component including a fixed housing for fixing the optical component, wherein the fixed housing includes the optical housing. A fixing portion for fixing the optical component by urging an outer peripheral portion of the component toward the support-side housing portion side is integrally formed. Here, the outer peripheral portion of the optical component is a position outside the optical component and does not impair the optical characteristics of the optical component. Also,
The integral fixed portion can be configured by, for example, cutting and raising a part of the resin-side support-side housing portion inside and forming the same. Then, a configuration in which the optical component is urged by utilizing the bending deformation of the cut and raised piece can be adopted. According to this aspect of the invention, when the support-side housing portion in which the optical component is supported and the fixed-side housing portion are attached, the optical portion is fixed by the fixed portion integrally formed on the fixed-side housing portion. The outer peripheral portion of the component is urged toward the support-side casing, and the optical component is fixed at a predetermined position in the optical component casing. Since the optical component can be mounted at a predetermined position in the optical component housing simply by attaching the support-side housing and the fixed-side housing in this way, the positioning and fixing of the optical component can be simplified.
Further, since the fixing portion is formed integrally with the fixed housing, only two members, the support housing and the fixed housing, are required to fix the optical components. It will be. Therefore, for example, the number of members can be reduced by one as compared with a case where an auxiliary member is used in addition to the support-side housing portion and the fixed-side housing portion and the optical component is fixed by these three members. Management cost can be reduced. Since the number of members can be reduced in this way, the structure of the optical component casing can be simplified.

Here, it is preferable that a plurality of the fixing portions are formed. Here, the projector is generally provided with a plurality of optical components in order to converge the light beam emitted from the light source in a stepwise manner or to change the direction of the light beam a plurality of times. For this reason, by arranging a plurality of fixing portions in the fixed housing portion, it is possible to cope with a projector in which a plurality of optical components are arranged. On this occasion,
The position of the fixed portion in the fixed housing can be changed as appropriate according to the size and shape of the projector.

Further, it is preferable that the fixing portion is made of resin. In this way, processing can be performed relatively inexpensively and easily as compared with the case of manufacturing with other materials such as metal. Since the processing is simple as described above, the urging force of the fixing portion can be appropriately changed according to the shape of the target optical component or the like.

Here, the fixing portion urges an outer peripheral portion of the optical component toward the support-side housing to fix the optical component, and a movable range of the urging member. And a movable restricting member for restricting the pressure within a predetermined range. In such a case, for example, even if some kind of force is applied to the optical component and the optical component moves, and the urging member moves with this movement, the movement of the urging member is limited to a predetermined range by the movable regulating member. Regulated within. For this reason, even if an excessive load is applied to the urging member, the urging member does not move forcibly, so that damage to the urging member can be prevented.

It is preferable that at least one urging member is set according to the optical component to be urged. With this configuration, for example, even when the optical component is large, by providing a plurality of biasing members, the optical component can be more reliably fixed at a predetermined position in the optical component casing.

[0010] The biasing member is a cut-and-raised piece formed by cutting and raising a part of the fixed side housing portion inward, and a bent portion of the cut-and-raised piece is formed on the outer periphery of the optical component. It is preferable that the optical component is fixed by urging the portion toward the support-side casing. With this configuration, the direction and size of the bent portion of the cut-and-raised piece can be changed relatively easily, so that the shape and the like of the optical component can be easily adjusted.

Further, the bent portion of the cut and raised piece has
It is preferable to have a contact surface that contacts the optical component and urges the optical component, and the contact surface is preferably a curved surface. Since the contact surface is curved as described above, even if the optical component slightly deviates from the action point of the urging member due to adjustment, the contact state between the urging member and the optical component can be maintained. The urging by the urging member can be maintained.

Here, it is preferable that the optical component is a condensing optical element. According to such a configuration,
Since the condensing optical element is relatively thicker than other optical components such as a mirror, the outer peripheral portion can be easily and reliably suppressed. For this reason, the light-collecting optical element can be correctly positioned, and light can be accurately collected.

On the other hand, a projector according to the present invention is characterized by comprising an optical component and any one of the above-mentioned optical component housings accommodating the optical component. According to the present invention, by providing the above-described optical component casing, the above-described object of the present invention can be achieved, and the other effects described above can be similarly exhibited. For this reason, assembling and manufacturing of the projector are facilitated, so that manufacturing costs can be reduced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One 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 viewed from above, FIG.
Is an overall perspective view of the projector 1 viewed from below, FIGS.
FIG. 5 is a perspective view showing the inside of the projector 1. Specifically, FIG. 3 is a diagram in which the upper case 21 of the projector 1 is removed from the state of FIG. 1, and FIG. 4 is a view in which the shield plate 80, the driver board 90, and the upper light guide 472 are removed from the state of FIG. FIG. 5 is a view from the side, and FIG.
FIG. 6 is a diagram in which the optical unit 4 is removed from the state of FIG.

1 to 3, a projector 1 includes:
An outer case 2, a power supply unit 3 housed in the outer case 2, and a flat U-shaped optical unit 4 also arranged in the outer case 2, and have a substantially rectangular parallelepiped shape as a whole.

The outer case 2 is composed of an upper case 21 and a lower case 23 made of resin. These cases 21 and 23 are fixed to each other with screws.

The upper case 21 includes an upper surface portion 211,
A side surface portion 212 provided therearound and a back surface portion 213
And the front part 214. On the front side of the upper surface portion 211, a lamp cover 24 is fitted and detachably attached. In the upper surface portion 211, a cutout portion 211 </ b> A where the upper surface portion of the projection lens 46 is exposed is provided on the side of the lamp cover 24.
The zoom and focus operations can be manually performed via a lever. An operation panel 25 is provided behind the notch 211A. Front part 214
Has a round hole opening 212A that is continuous with the cutout portion 211A of the upper case 21, and the projection lens 46 is arranged corresponding to the round hole opening 212A. This front part 2
14, an exhaust port 212B located in front of the internal power supply unit 3 is provided on the side opposite to the round hole opening 212A, and the exhaust port 212B has a direction in which the cooling air departs from the image projection area, that is, An exhaust louver 26 that exhausts air to the left in FIG. 1 and also serves as a light shield is provided (the exhaust louver 26 is actually a lower case 23).
Attached).

The lower case 23 is formed by a bottom portion 231 and a side portion 232 and a back portion 233 provided therearound. A position adjusting mechanism 27 that adjusts the inclination of the entire projector 1 to adjust the position of the projected image is provided in front of the bottom portion 231. Further, another position adjusting mechanism 28 for adjusting the inclination of the projector 1 in another direction is provided at one corner on the rear side of the bottom portion 231.
A rear foot 231A is provided at the other corner. However, the position of the rear foot 231A cannot be adjusted. Further, a cooling air intake port 231B is provided in the bottom surface portion 231. One side 232
Is provided with a mounting portion 232A for rotatably mounting the U-shaped handle 29.

On one side of the outer case 2, an upper case 21 and a lower case 23 are provided.
Each of the side portions 212 and 232 is provided with a side foot 2A (FIG. 2) serving as a foot when the projector 1 is set up with the handle 29 up. In addition, the outer case 2
Is provided on the back side of the rear surface portion 213 of the upper case 21 and the back surface portion 233 of the lower case 23. An interface cover 215 is provided in the interface portion 2B.
Further, on the inner side of the interface cover 215,
An interface board (not shown) on which various connectors are mounted is arranged. Also, on each of the left and right sides of the interface unit 2B, there are respective back parts 213, 233
A speaker hole 2C and an air inlet 2D are provided across the. The intake port 2D is an internal power supply unit 3
It is located on the rear side.

As shown in FIG. 4, the power supply unit 3 includes a power supply 31 and a lamp driving circuit (ballast) 32 disposed beside the power supply 31. The power supply 31 converts the power supplied through the power cable into the lamp driving circuit 3.
2 and a driver board 90 (FIG. 3) and the like, and has 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.

The optical unit 4, as shown in FIGS. 4, 6, and 7, is a unit that optically processes a light beam 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, 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 surrounding aluminum shield plate 80 (FIGS. 3 and 5) including the upper and lower portions, so that electromagnetic noise from the power supply unit 3 and the like to the outside can be obtained. To prevent leaks.

[2. Detailed Configuration of Optical System] In FIGS. 4 and 7, the integrator illumination optical system 41 includes three liquid crystal panels 441 (liquid crystal panels 441R and 441G for each of red, green, and blue light components) constituting the electro-optical device 44. , 4
41B) is an optical system for substantially uniformly illuminating the image forming area, and includes a light source device 413, a first lens array 418, and a second lens array 41 including a UV filter.
4, the polarization conversion element 415, and the first condenser lens 4
16, the reflection mirror 424, and the second condenser lens 4
19 is provided.

The light source device 413 includes a light source lamp 411 serving as a radiation light source for emitting a radial light beam.
And a reflector 412 that reflects the radiated light emitted from the light source lamp 411. As the light source lamp 411, a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp is often used. As the reflector 412, a parabolic mirror is used. In addition to a parabolic mirror, an elliptical mirror may be used together with a parallelizing lens (concave lens).

The first lens array 418 has a configuration in which small lenses each having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix. Each small lens divides a light beam emitted from the light source lamp 411 into a plurality of partial light beams. The outline shape of each small lens is
The shape is set to be substantially similar to the shape of one image forming area. For example, if the aspect ratio (the ratio between the 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 configuration as the first lens array 418, and has a configuration in which small lenses are arranged in a matrix. The second lens array 414 has a function of forming an image of each small lens of the first lens array 418 on the liquid crystal panel 441 together with the first condenser lens 416 and the second condenser lens 419.

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 includes a second
The light from the lens array 414 is converted into one type of polarized light, whereby the light use efficiency of the electro-optical device 44 is improved.

Specifically, the polarization conversion element 415
The respective partial lights converted into the polarized lights of the different types are finally converted by the first condenser lens 416 and the second condenser lens 419 into the liquid crystal panels 441R and 441 of the electro-optical device 44.
It is almost superimposed on 41G and 441B. In the projector 1 (electro-optical device 44) of the present embodiment using the liquid crystal panel 441 of the type that modulates polarized light, only one type of polarized light can be used. Almost half of the light is not used. Therefore, by using the polarization conversion element 415,
The light emitted from the light source lamp 411 is all converted to one type of polarized light, and the light use efficiency of the electro-optical device 44 is increased. Incidentally, such a polarization conversion element 415 is introduced in, for example, Japanese Patent Application Laid-Open No. 8-304739.

The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423. , And blue light.

The relay optical system 43 includes an incident side lens 43.
1, relay lens 433, and reflection mirrors 432, 4
And 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, the dichroic mirror 421 of the color separation optical system 42 transmits the blue light component and the green light component of the light beam emitted from the integrator illumination optical system 41 and reflects the red light component. The red light reflected by the dichroic mirror 421 is
The light is reflected by 3 and reaches the liquid crystal panel 441R for red through the field lens 417. This field lens 4
17 converts each partial light beam emitted from the second lens array 414 into a light beam parallel to its central axis (principal ray). 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, passes through the field lens 417, and reaches 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, thereby preventing a reduction in light use efficiency due to light diffusion or the like. That's why. That is, this is for transmitting the partial light beam incident on the incident side lens 431 to the field lens 417 as it is.

The electro-optical device 44 includes liquid crystal panels 441R, 441G, and 441B as three light modulating devices, each of which uses, for example, a polysilicon TFT as a switching element. Are separated by these three liquid crystal panels 441.
R, 441G, and 441B modulate according to image information to form an optical image.

The cross dichroic prism 45 includes three
A color image is formed by combining images modulated for each color light emitted from the liquid crystal panels 441R, 441G, and 441B. 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 interface of the four right-angle prisms. The three colored lights are combined by the dielectric multilayer film. Then, the color image synthesized by the cross dichroic prism 45 is
The light is emitted from the projection lens 46 and is enlarged and projected on a screen.

Each of the optical systems 41 to 45 described above is housed in a synthetic resin light guide 47 as a housing for optical components, as shown in FIGS. The light guide 47 includes the optical components 414 to 419,
Lower light guide 4 provided with grooves into which 421-423, 431-434 are slidably fitted from above, respectively.
71, and a lid-like upper light guide 472 that closes the upper opening side of the lower light guide 471. The structure of the upper light guide 472 will be described later in detail. A head section 49 is formed on the light exit side of the light guide 47. The projection lens 46 is fixed on the front side of the head unit 49, and the liquid crystal panels 441R, 4
A cross dichroic prism 45 to which 41G and 441B are attached is fixed.

[3. Cooling Structure] In the projector 1 of the present embodiment, a panel cooling system A for mainly cooling the liquid crystal panels 441R, 441G and 441B, a lamp cooling system B for mainly cooling the light source lamp 411, and a power supply 31 for mainly cooling. And a power supply cooling system C.

2, 4 and 5, in the panel cooling system A, a pair of sirocco fans 51 and 52 arranged on both sides of the projection lens 46 are used. The cooling air sucked from the intake port 231B on the lower surface by the sirocco fans 51, 52 is supplied to the liquid crystal panels 441R, 441G, 44.
After cooling the lower side of the driver board 90 (FIG. 3), the lower side of the driver board 90 (FIG. 3) is moved toward the axial exhaust fan 53 at the front corner, and the front side exhaust port 212B is cooled.
It is exhausted from.

4 to 6, in the lamp cooling system B, a sirocco fan 54 provided on the lower surface of the optical unit 4 is used. The cooling air in the projector 1 drawn by the sirocco fan 54 enters the light guide 47 from an opening (not shown) provided in the upper light guide 472, and enters between the unitized second lens array 414 and the polarization conversion element 415. After cooling these through the exhaust port opening 4 of the lower light guide 471
The sirocco fan 54 draws out from 71A and is discharged. The discharged cooling air is supplied to the lower light guide 4
71 again into the light guide 47 through the intake side opening 471B, into the light source device 413, and
1 is cooled, and thereafter, 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
An axial-flow intake fan 55 provided behind 1 is used. After cooling the power supply 31 and the lamp driving circuit 32, the cooling air sucked from the rear-side intake port 2D by the axial-flow intake fan 55 is exhausted by the axial-flow exhaust fan 53 similarly to the other cooling systems A and B. Air is exhausted from the port 212B.

[4. Upper light guide structure]
Referring to FIGS. 8 to 10, the upper light guide 472
A structure for positioning and fixing the first condenser lens 416 as an optical component and the incident side lens 431 in the light guide 47 will be described. As shown in FIG. 8, the upper light guide 472 has a first condenser lens fixing portion 60 for positioning and fixing the first condenser lens 416 (FIGS. 4 and 7) not shown in FIG. The incident side lens 43 not shown in FIG.
An incident-side lens fixing portion 70 for positioning and fixing 1 (FIGS. 4 and 7) is formed.

In FIG. 9, as the first condenser lens fixing section 60 is shown in an enlarged manner, the first condenser lens fixing section 60 abuts on the first condenser lens 416 (FIG. 10). And two movable urging members 61 for urging and fixing the urging member, and a movable regulating member 62 for regulating the movable range of these urging members 61 within a predetermined range.

Here, as shown in FIG. 10, the first condenser lens 416 has an outer peripheral portion 416A as shown in FIG.
Flat lower surface 416A1 and upper surface 416A
2 are formed. For this reason, the lower light guide 471
The projection surface 471X formed on the bottom surface 416A1 is in contact with the lower surface 416A1, so that the first condenser lens 416 can be maintained in an upright state. Further, in the vicinity of the outer peripheral portion 416A of the first condenser lens 416, the curved surface portion 41 is provided.
A contact surface 416B1 that is in contact with a contact surface 611A described later and that is formed in a planar shape is formed on the right side in the drawing of 6B.

Returning to FIG. 9, the biasing member 61 is formed such that a part of the upper light guide 472 made of synthetic resin is cut and raised inside the light guide 47, and its cross section is in the shape of a letter "L". It is a formed cantilever spring-like cut-and-raised piece. As shown in FIG. 10, a curved contact surface 611 </ b> A is formed in the bent portion 611 on the distal end side of the cut-and-raised piece, and the contact surface 611 </ b> A is a contact surface of the first condenser lens 416. The first condenser lens 416 is biased toward the lower light guide 471 by contacting the first light guide 416B1. As described above, since the cut-and-raised piece has a cantilever spring shape, the cut-and-raised piece has a direction orthogonal to the upper and lower surfaces 416A2 and 416A1 of the first condenser lens 416, that is, FIG.
It is designed to be movable up and down in the middle.

On the other hand, as shown in FIG. 9, the movable regulating member 62 is formed to protrude from the upper light guide 472, and has a first regulating member 621 having a substantially L-shaped cross section and a second regulating member having a rectangular plate shape. It comprises a regulating member 622 and a third regulating member 623 having an L-shaped cross section. The movable regulating member 62 is moved by the three regulating members 621 to 623 in accordance with the outer shape of the first condenser lens 416.
Both ends are substantially concave so as to extend obliquely upward. In addition, these three regulating members 621 to 623
, The upper light guide 472, each regulating member 621
To 623A, 622A, 623
It is formed so that the positions of A are aligned.

Further, between the first regulating member 621 and the second regulating member 622 and between the second regulating member 622 and the third regulating member 623, the tip 611B of the bending portion 611 is provided.
Gaps 624 and 62 having a dimension T slightly larger than the width dimension L of
5 are provided. These gaps 624, 625 are
When the urging members 61 move to the upper light guide 472 side, they are provided at positions where the distal end portions 611B of the bending portions 611 of the respective urging members 61 are inserted.

Here, as shown in FIGS. 9 and 10, an upper surface of each of the regulating members 621 to 623, and a flat protruding surface 626 corresponding to the bottom of the concave portion, is provided with an upper surface of the first condenser lens 416. The first condenser lens 416 is installed in the light guide 47 so that 416A2 faces.

On the other hand, as shown in FIG. 8, the above-described urging member 61 and the movable regulating member 72 are also provided in the incident side lens fixing portion 70. However, the incident side lens fixing portion 70 is different from the above-described first condenser lens fixing portion 60 in that only one urging member 61 is formed. The shape and function of the urging member 61 in the incident-side lens fixing part 70 are the same as those of the urging member 61 described above, and thus the same reference numerals are used and the description thereof is omitted.

The contact surface corresponding to the contact surface 416B1 of the first condenser lens 416 is not particularly formed on the incident side lens 431. For this reason, the curved surface portion of the incident-side lens 431 contacts the contact surface 611A instead of the contact surface described above.

The movable regulating member 72 has the same function as the movable regulating member 62 described above, but differs in the shape thereof. Specifically, the movable restricting member 72 includes a first restricting member 721 and a second restricting member 722 having the same size and a substantially right-angled triangular plate shape whose oblique side is formed in an arc shape. The movable regulating member 72 is formed into an arc shape by the two regulating members 721 and 722 according to the shape of the substantially circular incident side lens 431. On this occasion,
The two regulating members 721 and 722 are connected to the upper light guide 47.
In 2, each of the regulating members 721, 722 is formed such that the positions of the planar portions 721A, 722A are aligned.
A gap 723 having a dimension T is provided between the two regulating members 721 and 722 as described above.
When the urging member 61 moves to the upper light guide 472 side, the distal end 6 of the bending portion 611 of the urging member 61
11B is provided so as to be a position to be inserted.

To summarize the above, the incident side lens 4
Since the size of the first lens 31 is smaller than that of the first condenser lens 416, the incident side lens 431 can be sufficiently fixed even if only one biasing member 61 is formed on the upper light guide 472. ing. Therefore, the size of the movable regulating members 62 and 72 is appropriately adjusted according to the size of the fixed lenses 416 and 431, and the number of the urging members 61 is also adjusted.
6,431 can be positioned and fixed.

Here, a case where the first condenser lens 416 is moved by an external force will be described by taking the first condenser lens fixing section 60 as an example with reference to FIG. As shown in FIG. 10, for example, the projector 1
Fall, and an impact force is applied to the first condenser lens 416, the first condenser lens 416 moves to the upper light guide 472 side as shown by a two-dot chain line X in FIG. Then, the contact surface 4 of the first condenser lens 416
The upper surface 416A of the first condenser lens 416 in a state where the contact surface 16B1 and the contact surface 611A of the bending portion 611 are in contact with each other.
2 comes into contact with the protruding surface 626 of the movable regulating member 62. Therefore, the urging member 61 moves to a position indicated by a two-dot chain line Y in FIG. That is, the urging member 61 is movable between the position indicated by the solid line in FIG. 10 and the position indicated by the two-dot chain line Y in FIG.

Therefore, even if the urging member 61 moves to the position indicated by the two-dot chain line Y, the urging member 61 is adjusted in advance to a thickness and a size that can withstand the movement so that the urging member 61 is not damaged. With such a configuration, it is possible to prevent the urging member 61 from being damaged. In the present embodiment, the urging member 61 is formed in consideration of such points.

Although the first condenser lens fixing section 60 has been described as an example, the same effect as described above also occurs in the incident side lens fixing section 70. Thus, the urging member 61 is formed.

According to the present embodiment, the following effects can be obtained. (1) When the lower light guide 471 supporting the lenses 416 and 431 and the upper light guide 472 are attached, the outer periphery of the lenses 416 and 431 is formed by the biasing member 61 formed integrally with the upper light guide 472. The portion is urged toward the lower light guide 471 and the lens 41
6, 431 are fixed at predetermined positions in the light guide 47. Since the lenses 416 and 431 are mounted at predetermined positions in the light guide 472 simply by attaching the upper light guide 472 and the lower light guide 471 in this manner, the positioning and fixing of the lenses 416 and 431 can be simplified.

(2) The urging member 61 is used as the upper light guide 472.
Are formed integrally with each other, so that the lenses 416 and 431
The lower light guide 471 is a member for fixing the
And only the upper light guide 472. Therefore, for example, the number of members can be reduced by one as compared with a case where an auxiliary member is used in addition to the lower light guide 471 and the upper light guide 472 and the lenses 416 and 431 are fixed by these three members. Management cost can be reduced. Since the number of members can be reduced in this way, the structure of the light guide 47 can be simplified.

(3) Since the movable regulating members 62 and 72 are formed on the upper light guide 472, for example, the lenses 416 and 4
Even if some force is applied to the lens 31 and the lenses 416 and 431 move, and the urging member 61 moves with this movement, the movement of the urging member 61 is controlled within a predetermined range by the movable regulating members 62 and 72. Be regulated. For this reason, the urging member 6
Even if an excessive load is applied to 1, the urging member 61 does not move forcibly, so that the urging member 61 can be prevented from being damaged.

(4) The upper light guide 472 has a fixing portion 60 for the first condenser lens 416 and the incident side lens 4
Since two fixing portions are provided for the fixing portion 70 for the projector 31, the projector 1 in which a plurality of optical components such as the first condenser lens 416 and the incident side lens 431 are arranged can be used.

(5) Since the urging member 61 is made of a synthetic resin, it can be processed relatively inexpensively and easily as compared with the case where it is made of another material such as metal. Therefore, the urging force of the urging member 61 can be appropriately changed according to the shapes of the lenses 416 and 431 and the like. Further, lenses 416,
Even when the urging member 61 moves along with the movement of the 431, the urging member 61 can be easily formed into a shape that does not break.

(6) The urging member 61 is moved to the upper light guide 472.
Is formed as a cut-and-raised piece formed by being cut and raised inside.
Since the direction and size of the lens 1 can be changed relatively easily, the shape and the like of the lenses 416 and 431 can be easily adjusted.

(7) Since the contact surface 611A of the bending portion 611 of the biasing member 61 is a curved surface, the lenses 416, 4
Due to the adjustment of 31, the contact between the contact surface 611 </ b> A and the lenses 416 and 431 can be maintained even if the contact point on the contact surface 611 </ b> A of the urging member 61 is slightly deviated. Can be maintained. Also, the contact surface 611A
Is a curved surface, so that the contact surface 611A and the lenses 416, 4
Friction at a contact portion with the base member 31 is reduced. Therefore, the contact portions of the lenses 416 and 431 are not damaged, so that the lenses 416 and 431 can be used for a long time.

(8) Since the first condenser lens fixing portion 60 is provided with the two biasing members 61, the incident side lens 4
First condenser lens 416 that is relatively large compared to
However, it can be reliably fixed at a predetermined position in the light guide 472.

(9) Since the optical parts to be positioned and fixed are the lenses 416 and 431, which are condensing optical elements, these lenses 416 and 431 must be relatively thicker than other optical parts such as reflecting mirrors. Therefore, the outer peripheral portion can be suppressed simply and reliably. For this reason, the lenses 416 and 431, which are light-collecting optical elements, can be correctly positioned, and light can be accurately collected.

(10) The projector 1 has optical systems 41 to 4
5, various optical components 414 to 419, 421 to 4
23, 431 to 434 and these optical components 414 to 4
19, 421 to 423, 431 to 434, and the light guide 47 for accommodating the same, the above-described object of the present invention can be achieved, and the above-mentioned other functions and effects can be similarly obtained. . For this reason, assembling and manufacturing of the projector 1 are facilitated, so that manufacturing costs can be reduced.

It should be noted that the present invention is not limited to the above-described embodiment, but includes other configurations capable of achieving the object of the present invention, and also includes the following modifications.
For example, in the above-described embodiment, the optical components to be positioned and fixed are the lenses 416 and 431. However, for example, a condensing optical element including other lenses such as the relay lens 433 and the second condenser lens 419 may be used. In this case, a fixing portion having the same configuration as the fixing portions 60 and 70 may be formed.

Here, in the above embodiment, the fixing portion 6
Since the urging member 61 which is a cut-and-raised piece is formed at 0, 70, an opening is formed in the upper light guide 472. For this reason, since a part of the light flux will leak from these openings, corresponding to all optical components,
The urging member 61 as described above cannot be provided. Therefore, in the present embodiment, the urging member 61 is formed only in the first condenser lens 416 and the incident-side lens 431 that can suppress light leakage as compared with other optical components. In addition, in order to prevent the light flux from leaking, it is only necessary to eliminate the opening portion by the cut and raised piece,
For example, a cover or the like that covers the opening may be attached.
However, such a cover is preferably formed integrally with the upper light guide 472 so as not to increase the number of members.

In the above-described embodiment, the first condenser lens 416 includes the bending portion 611 of the biasing member 61.
Although the contact surface 416B1 that makes contact with the contact surface 611A is formed, the contact surface 416B1 may not be provided as in the case of the incident side lens 431, and the contact surface 416B1 may make contact with the curved surface portion 416B of the lens. However, forming the contact surface 416B1 has an advantage that the direction of the urging force is constant as compared with the case where the curved surfaces make contact with each other, so that the positioning and fixing of the first condenser lens 416 can be surely performed.

Further, the target optical parts are not limited to the condensing optical element as described above,
Optical components including 432, 434, etc. may be used. At this time, a fixing portion having the same configuration as the fixing portions 60 and 70 may be formed. However, since the reflection mirror is relatively thin, it is necessary to devise, for example, a configuration in which the end side is urged so as not to cause distortion or the like. If attention is paid to this point, the positioning and fixing can be performed by a fixing member having the same configuration as the condensing optical element.

Here, in the above embodiment, the biasing member 61 is cut and raised, but is not limited to this.
The shape may be a spherical shape protruding from the upper light guide 472. In short, any shape may be used as long as the optical component is urged to the lower light guide 471 and fixed. Further, the contact surface 611A of the bent portion 611 in the cut-and-raised piece is a curved surface, but is not limited thereto, and may be another surface such as a flat surface. However, the curved surface can reduce the friction at the contact portion as compared with the flat surface, and
6,431 can have a long service life.

In the above embodiment, the urging member 6
Although 1 is formed of a synthetic resin, the present invention is not limited to this, and it may be formed of another resin such as a natural resin or another material such as a metal. However, there is an advantage that the above-described embodiment is superior in processing suitability, cost, and the like.

Further, in the above-described embodiment, the movable restricting members 62 and 72 are formed on the upper light guide 472. However, the urging member 61 may be configured so as not to cause troubles such as breakage of the urging member 61. If it does not need to be particularly formed.

In the above embodiment, two urging members 61 are formed in the first condenser lens fixing portion 60, and one urging member 61 is formed in the incident side lens fixing portion 70.
Is formed, but the urging member 6 is
The number for forming 1 is not particularly limited, and may be appropriately changed in accordance with the size of the target optical component or the like. At this time, the position of the urging member 61 in the fixing portions 60 and 70 is not limited to the position in the above embodiment, but may be any position.

Further, in the above embodiment, the urging member 61 is formed to urge the upper side of the outer peripheral portion of the lens 416, 431. However, the present invention is not limited to this.
It may be formed so as to be urged at an arbitrary position, such as the upper right side or the upper left side, of the outer peripheral portion of 31.

In the above embodiment, in the first condenser lens fixing portion 60, the movable restricting member 62 is constituted by three restricting members 621 to 623, and in the incident side lens fixing portion 70, the movable restricting member 72 is formed by two movable members. Regulating member 721,
Although the configuration is made up of 722, the configuration is not limited to this, and it may be made up of an arbitrary number of restriction members such as one or four. Furthermore, in the above-described embodiment, the shapes of the movable regulating members 62 and 72 are substantially concave or substantially arc-shaped, but are not limited to such shapes.
It can be of any shape.

As described above, the number and shape of the fixed portions including the urging member and the movable regulating member can be arbitrarily set. By appropriately changing the shape and the like, it is possible to correspond to various optical components.

[0075]

As described above, according to the present invention,
There is an effect that the positioning and fixing of the optical component can be simplified and the structure can be simplified.

[Brief description of the drawings]

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

FIG. 2 is an overall perspective view of the projector viewed from below.

FIG. 3 is a perspective view showing the inside of the projector;
Specifically, FIG. 2 is a diagram in which an upper case of the projector is removed from the state of FIG. 1.

FIG. 4 is a perspective view showing the inside of the projector,
Specifically, FIG. 4 is a view seen from the rear side with the shield plate, the driver board, and the upper light guide removed from the state of FIG. 3.

FIG. 5 is a perspective view showing the inside of the projector;
Specifically, FIG. 5 is a diagram in which the optical unit is removed from the state of FIG.

FIG. 6 is a perspective view of the optical unit viewed from below.

FIG. 7 is a plan view schematically showing an optical system of the projector.

FIG. 8 is a perspective view of the upper light guide as viewed from below.

FIG. 9 is an enlarged perspective view showing a main part of the upper light guide.

FIG. 10 is a diagram showing a contact portion between a first condenser lens and a main part of the upper light guide in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Projector 45 Cross dichroic prism 47 Light guide as a housing for optical components 60 First condenser lens fixing portion 61 Urging member 62, 72 Movement regulating member 70 Incident side lens fixing portion 414-419, 421-423, 431-434
Optical component 416 First condenser lens 416A as optical component Outer peripheral portion 431 Incident lens 441 as optical component 441, 441R, 441G, 441B Liquid crystal panel 471 Lower light guide 472 as support side housing 472 As fixed side housing Upper light guide 611 Flexure part 611A Contact surface that is a curved surface

Claims (9)

[Claims] An optical component such as a lens or a mirror is housed therein.
In order to position and fix the optical component on a predetermined illumination optical axis set therein, a support-side housing portion that supports the optical component and a fixed-side housing portion that fixes the optical component are provided. An optical component housing, wherein a fixed portion for fixing the optical component by urging an outer peripheral portion of the optical component toward the supporting housing portion side is integrated with the fixed housing portion. A housing for an optical component, which is formed in a uniform manner. 2. The optical component casing according to claim 1, wherein a plurality of the fixing portions are formed. 3. The optical component casing according to claim 1, wherein the fixing portion is made of a resin. 4. The optical component casing according to claim 1, wherein the fixing portion urges an outer peripheral portion of the optical component toward the support-side casing. An optical component housing, comprising: a biasing member for fixing the optical component to the optical component; and a movable regulating member for regulating a movable range of the biasing member within a predetermined range. 5. The optical component casing according to claim 4, wherein the urging member is set at least one or more in accordance with the optical component to be biased. 6. The optical component casing according to claim 5, wherein the biasing member is a cut-and-raised piece formed by cutting and raising a part of the fixed-side casing portion inward. A housing for an optical component, wherein a bent portion of the cut-and-raised piece urges an outer peripheral portion of the optical component toward the support-side housing to fix the optical component. 7. The optical component casing according to claim 6, wherein a bent portion of the cut-and-raised piece comes into contact with the optical component and urges the optical component toward the support-side casing. An optical component housing having a contact surface, wherein the contact surface is a curved surface. 8. The optical component casing according to claim 1, wherein said optical component is a light-collecting optical element. 9. A projector comprising: an optical component; and the optical component casing according to claim 1 for accommodating the optical component.