JPH11352902A - Suspension device for liquid crystal rear projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optionally select a normal posture or an inverted posture of a liquid crystal rear projector by suspending both left and right side faces in lower pats of an optical projection lens part and a screen part with a suspension member. SOLUTION: An optical projection lens part 1 is suspended from a ceiling or the like in an inverted posture where the lens part 1 is mounted on a screen part 2, in a liquid crystal rear projector 3 comprising two-layer structure composed of upper and lower layers of the lens part 1 and the screen part 2 built-in with a reflection mirror. The screen part 2 is arranged thereby in a lower side of the lens part 1 to easily watch a projected image. The projector 3 is suspended from the ceiling or a wall in the same manner as the inverted posture, using a single suspension device 11, by replacing only the screen part 2 on an upper side of the lens part 1 to change the projector 3 into a normal posture, so as to optionally select the normal or inverted posture for the projector 3 in response to a user's desire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique of a suspension apparatus for suspending a liquid crystal rear projector having a two-layer structure of an upper and lower layers of an optical projection lens section and a screen section having a built-in reflection mirror to a ceiling or a wall. Belongs to the field.

[0002]

2. Description of the Related Art Conventionally, when a liquid crystal rear projector having an upper and lower two-layer structure of an optical projection lens unit and a screen unit having a built-in reflection mirror is hung on a ceiling or a wall,
Take the upright posture with the heavy optical projection lens unit down and a lightweight screen unit on top of it, and use a device that receives the bottom of the optical projection lens unit located below from the ceiling or It is common to hang it on a wall or the like. However, since the liquid crystal rear projector can reverse the image projected on the screen with simple changes of the electric signal, it is necessary to adopt an inverted posture with an optical projection lens mounted on the screen. Is possible,
When the liquid crystal rear projector is hung on a ceiling, wall, or the like in this inverted posture, the image projected on the screen becomes easier for the user to view because the screen is placed below the optical projection lens. Side effects can be created.

[0003]

However, it has been attempted to hang the liquid crystal rear projector in an inverted posture to a ceiling or a wall using a device for receiving the bottom surface of an optical projection lens unit which has been used in a conventional upright posture. Then, the top surface of the optical projection lens unit must be hung from above with the above-mentioned device.
At this time, the top surface of the outer case of the optical projection lens unit and the screen unit is hardly weighed when used in an upright posture. Designed to be lower than strength. Therefore, when the top surface of the outer case of the optical projection lens unit of the liquid crystal rear projector in an inverted posture is hung from above with an instrument, the entire weight of the suspended load of the liquid crystal rear projector is concentrated on the top surface with low strength. As a result, the top surface may be easily deformed or damaged in some cases. In addition, the deformation of the top surface of the optical projection lens unit spreads to the screen unit and deforms the screen, causing a defect that an image projected from the optical projection lens unit onto the screen is distorted. Further, when the liquid crystal rear projector is used in the upright position, it is sufficient to place the screen unit on the upper part of the optical projection lens unit and position the screen unit. There is a problem that a dedicated device for suspending the camera under the optical projection lens unit is newly required, which increases the cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a liquid crystal rear projector can be stably mounted on a ceiling, a wall, or the like by the same suspending member in both an upright posture and an inverted posture. It is an object of the present invention to provide a suspension device for a liquid crystal rear projector that can be suspended.

[0005]

In order to achieve the above object, a liquid crystal rear projector suspension apparatus according to the present invention is provided.
At least the left and right side surfaces of the optical projection lens unit and the screen unit which are arranged at the lower part are supported by a suspending member and suspended from a ceiling, a wall, or the like.

[0006] In the suspension apparatus for a liquid crystal rear projector according to the present invention, the left and right side surfaces of the optical projection lens unit and the screen unit which are disposed at least at the lower part are supported by the suspension members. Since the optical projection lens is suspended from the ceiling or wall, etc., the same suspending member can be used in any of the upright posture in which the optical projection lens is arranged below the screen and the inverted posture in which the optical projection lens is arranged above the screen. Can be hung.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a liquid crystal rear projector according to an embodiment of the present invention;

First Embodiment First, a first embodiment of a suspension device for a liquid crystal rear projector will be described with reference to FIGS. 1 to 3. First, FIGS. 1 and 2 show an optical projection lens unit 1. In a liquid crystal rear projector 3 having an upper and lower two-layer structure of a liquid crystal rear projector 3 and a screen portion 2 having a built-in reflection mirror (not shown), an inverted posture in which the optical projection lens portion 1 is mounted on the upper portion of the screen portion 2 (conventional suspension system) (Upside down state) is shown in an embodiment in which it is suspended from a ceiling or the like.

The hanging member 11 is composed of a pair of left and right supporting members 12 formed of a metal or a high-strength synthetic resin molded product or the like, and a hanging member 13 assembled by a plurality of frame parts 13a to 13c. ing. Then, first, an outer case (referred to as a so-called cover member formed of a metal plate, a synthetic resin molded product, or the like) of the optical projection lens unit 1 and the screen unit 2 is used.
A pair of left and right support members 12 are attached to the left and right side surfaces 111b and 112b having higher strength than the top surfaces 111a and 112a by screwing or bonding. At this time, if the left and right side surfaces 111b and 112b are flush with each other, the pair of left and right support members 12 are
It can be attached so as to straddle between 11b and 112b. Then, the lower ends of the pair of left and right frame parts 13a of the hanging member 13 are detachably attached to the left and right side surfaces of the pair of left and right support members 12 by screws or the like. The frame members 13b and 13c are attached by screwing or bonding, and the hanging member 13 is assembled. Then, the liquid crystal rear projector 3 is suspended by a suspension member 13 on a ceiling, a wall, or the like. At this time, a pair of left and right support pins 12a, which are angle adjusting means of the liquid crystal rear projector 3, are horizontally protruded from both left and right side surfaces of the pair of right and left support members 12, and a pair of left and right frame parts 1 of the hanging member 13 are provided.
If the lower end of 3a is configured to be rotatable relative to these support pins 12a in the direction of arrow a in the direction of arrow a and is removably screwed, etc., the liquid crystal rear projector suspended from the ceiling or wall, etc. The angle (elevation angle) of No. 3 can be adjusted in the direction of arrow a.

As described above, the optical projection lens unit 1
When the liquid crystal rear projector 3 in an inverted posture in which the screen unit 2 is mounted on the ceiling or a wall or the like by the suspension device 11, the screen unit 2 is disposed below the optical projection lens unit 1. In addition, it is possible to produce a secondary effect that the image projected on the screen unit 2 is easily viewed by the user.

In addition, the suspending device 11 comprises a pair of left and right support members 12 for top surfaces 111a, 11a of the outer cases 111, 112 of the optical projection lens unit 1 and the screen unit 2.
Left and right side surfaces 111 configured to be higher in strength than 2a
b, 112b so that these left and right side surfaces 1
11b and 112b are simultaneously supported, so that the suspension load of the liquid crystal rear projector 3 is
11 and 112, the suspension load is dispersed between the left and right side surfaces 111b and 112b of both outer cases 111 and 112, and the strength of the left and right side surfaces 111b and 112b is reduced. While keeping
The liquid crystal rear projector 3 can be hung with good stability. Therefore, the top surface 111 having a lower strength than the left and right side surfaces 111b and 112b of both outer cases 111 and 112.
Since a large load is hardly applied to the outer casings a and 112a, it is possible to prevent the outer casings 111 and 112 from being deformed or damaged. In addition, the screen itself is deformed by the outer casing 112 being deformed. In addition, it is possible to prevent the inconvenience that the image projected from the optical projection lens unit 1 on the screen is distorted, and to realize the liquid crystal rear projector 3 with high quality and high reliability.

Further, in the suspending device 11, the pair of left and right support members is formed by the optical projection lens unit 1 and the screen unit 2.
Left and right side surfaces 111b, 1
Since the optical projection lens unit 1 and the screen unit 2 can be simultaneously supported by the pair of left and right support members 12 because they are attached to each other by screwing or bonding so as to straddle between the 12b. Therefore, these support members 1
2, the component for coupling the optical projection lens unit 1 and the screen unit 2 can also be used as the supporting component, and the cost can be reduced by reducing the number of components and the number of assembly steps.

According to the hanging device 11,
When repairing or adjusting the liquid crystal rear projector 3,
By removing the pair of left and right support members 12 from the pair of left and right frame parts 13a of the hanging member 13, all the frame parts 13 of the hanging member 13 are removed from the ceiling or wall.
Even without removing a, 13b, and 13c, only the liquid crystal rear projector 3 can be easily removed while the hanging member 13 is attached to a ceiling, a wall, or the like. Therefore, after the work such as the repair and adjustment of the liquid crystal rear projector 3 is completed, the work of mounting the liquid crystal rear projector 3 on the ceiling or the wall can be easily performed.

According to the hanging device 11, as shown in FIG. 3, the screen unit 2 is connected to the optical projection lens unit 1.
1 and the liquid crystal rear projector 3 is changed to the upright posture (conventional suspension system), and the same suspension device 11 is used in exactly the same manner as the inverted posture described with reference to FIGS. The projector 3 can be hung on a ceiling or a wall, and the upright posture and the inverted posture of the liquid crystal rear projector 3 can be freely selected according to a user's request.

[Second Embodiment] Next, a second embodiment of a suspension device for a liquid crystal rear projector will be described with reference to FIGS. 4 and 5. In this case, an optical projection lens unit 1 and a screen unit 2 will be described. In the liquid crystal rear projector 3 having the upper and lower two-layer structure, for example, the standard size optical projection lens unit 1 and the large size screen unit 2 having a larger screen size are combined, or the standard size screen unit 2 is used. The liquid crystal rear projector 3 is configured by combining the optical projection lens unit 1 with a small-sized optical projection lens unit 1.
Therefore, the liquid crystal rear projector 3 is configured such that the right and left side surfaces 111 of these outer cases 111 and 112 are different depending on the size difference between the optical projection lens unit 1 and the screen unit 2.
Step H occurs between b and 112b.

Therefore, the suspension device 11 includes a pair of left and right support members 14 attached between the left and right side surfaces 111b and 112b in accordance with the step H between the left and right side surfaces 111b and 112b of the outer cases 111 and 112. I'm using The pair of left and right support members 14 is fixed to the inside of the frame component 14a and extends between the left and right side surfaces 111b and 112b. The left and right support members 14 are screwed or adhered to the left and right side surfaces 111b and 112b of the exterior frames 111 and 112 by the inner plurality of step correction components 14b. Thus, the pair of left and right support members 14 is attached so as to straddle between the left and right side surfaces 111b and 112b. In addition, a pair of left and right support pins 14c is horizontally protruded from both left and right sides of the pair of left and right frame parts 14a. The hanging member 15 is assembled by a plurality of frame parts 15a to 15d. After attaching the pair of left and right support members 14 so as to straddle the left and right side surfaces 111b and 112b of the exterior frames 111 and 112, the hanging member 15 is attached. 15 pair of left and right frame parts 15a
The lower end of the pair of left and right frame parts 15a is attached to the pair of left and right support pins 14c on the left and right sides of the pair of left and right frame parts 14a by rotationally adjustable and detachable screws. Attach other frame parts 15b to 15d to the upper end by screwing or bonding,
The hanging member 15 is assembled. Then, the liquid crystal rear projector 3 is suspended by a suspension member 13 on a ceiling, a wall, or the like.

Therefore, according to the second embodiment, the outer case 11 of the optical projection lens unit 1 and the screen unit 2 is provided.
Step H between the left and right side surfaces 111b, 112b of
Despite the occurrence of the step H, the pair of left and right frame members 14a of the pair of left and right support members 14 of the suspension device 11 and the plurality of step correction components 14b perform correction for the step H, and Frame parts 14
a can be mounted so as to straddle between the left and right side surfaces 111b and 112b, so that the suspension load of the liquid crystal rear projector 3 does not concentrate on any one of the exterior cases 111 and 112, and the suspension load The left and right side surfaces 111b, 112 of both outer cases 111, 112
b so that these left and right side surfaces 111
The liquid crystal rear projector 3 can be stably suspended while maintaining the strengths of b and 112b. Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.

Third Embodiment Next, referring to FIG.
A third embodiment of a suspension device for a liquid crystal rear projector will be described. In this case, a plurality of level difference correction components 14b attached to the inside of the frame component 14a of the pair of left and right support members 14 shown in the second embodiment The adjuster 16 is attached to one or all of the above, and the movable component 16b is shown in the direction of the arrow b by the elongated hole 16c and the thumb screw 16d with respect to the fixed component 16a fixed inside the frame component 14a. The step-adjusting component 14b with the adjuster 16 is configured by being mounted on the side so as to be able to slide.

Therefore, if the step correction component 14b with the adjuster 16 is used, the step H between the left and right side surfaces 111b and 112b of the optical projection lens unit 1 and the outer cases 111 and 112 of the screen unit 2 changes to various dimensions. Also, a step correction component 14 with an adjuster 16
b, the movable part 16b is slid to the left and right sides, and the movable part 16b is moved to the left and right sides 111b, 11b.
Since it can be attached to the 2b side by screwing, bonding, or the like, even if the step H changes to various dimensions, one type of support member 14 can sufficiently cope with the step H, and a versatile hanging device. 11 can be realized.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical concept of the present invention. For example, in the above-described embodiment, the pair of left and right support members 12 and 14 are attached so as to straddle between the left and right side surfaces 111b and 112b of the exterior cases 111 and 112.
According to the technical idea of the present invention, the screen unit 2 or the outside of the optical projection lens unit 1 disposed at least below the liquid crystal rear projector 3 having a two-layer structure of the upper and lower layers of the optical projection lens unit 1 and the screen unit 2 Case 112 or 11
It suffices if the left and right side surfaces 112b or 111b are supported by a pair of left and right support members 12 or 14.

[0021]

The hanging device for a liquid crystal rear projector according to the present invention having the above-described structure has the following effects.

According to a first aspect of the present invention, at least the left and right sides of the optical projection lens portion and the screen portion which are arranged at the lower portion are supported by a suspending member and suspended on a ceiling or a wall. The same suspending member can be used to suspend the lens unit in either the upright position in which the lens unit is disposed below the screen unit or the inverted position in which the optical projection lens unit is disposed above the screen unit. The upright posture and the inverted posture of the liquid crystal rear projector can be freely selected as desired. In addition, even when the optical projection lens is suspended in an inverted position in which the optical projection lens is disposed above the screen, the side having a higher strength than the top surface of the screen can be stably supported. Because the suspended load was concentrated on the top surface where the strength of the part was low, the screen was deformed,
The inconvenience of distorting the image projected on the screen can be prevented beforehand, and a high-quality and highly reliable liquid crystal rear projector can be realized.

According to a second aspect of the present invention, the pair of left and right support members simultaneously support the optical projection lens unit and the screen unit so as to straddle the left and right sides of the screen unit. It can be dispersed between the left and right sides of the screen part and supported with high strength, and the liquid crystal rear projector can be hung with stability. The pair of left and right support members simultaneously support the optical projection lens unit and the screen unit so as to straddle the left and right side surfaces of the screen unit, so that components for coupling the optical projection lens unit and the screen unit can be omitted. In other words, the pair of left and right support members can also be used as a support component and a coupling component for the optical projection lens unit and the screen unit, thereby realizing cost reduction by reducing the number of components and the number of assembly steps.

According to a third aspect of the present invention, a pair of right and left support members are used which are mounted in accordance with a step between the left and right side surfaces of the optical projection lens unit and the screen unit. The suspension load can be dispersed on the left and right side surfaces of the optical projection lens unit and the screen unit, and can be supported with high strength. Further, it is possible to increase the screen size of the screen unit without increasing the size of the optical projection lens unit.

According to a fourth aspect of the present invention, a pair of right and left support members are provided with an adjuster that can be adjusted in accordance with a step between the left and right sides of the optical projection lens unit. Can support enough with the support member of
High versatility can be realized.

In the fifth aspect, since the angle adjusting means of the liquid crystal rear projector with respect to the hanging member is provided, it is possible to freely adjust the screen of the liquid crystal rear projector suspended on a ceiling, a wall or the like to an easy-to-view angle.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a first embodiment of a suspension device for a liquid crystal rear projector to which the present invention has been applied.

FIG. 2 is a perspective view showing a hanging state of the hanging device of the liquid crystal rear projector in an inverted posture according to the first embodiment;

FIG. 3 is a perspective view showing a hanging state of the hanging device of the liquid crystal rear projector in the upright posture.

FIG. 4 is an exploded perspective view illustrating a second embodiment of a suspension device for a liquid crystal rear projector to which the present invention is applied.

FIG. 5 is a perspective view showing a suspended state of the suspension device for the liquid crystal rear projector according to the first embodiment.

FIG. 6 is an enlarged front view of a main part for explaining an adjuster of the suspension device for the liquid crystal rear projector according to the first embodiment.

[Explanation of symbols]

1 is an optical projection lens unit, 111 is its exterior case, 11
1b is its left and right side surfaces, 2 is a screen part, 112 is its exterior case, 112b is its left and right side surfaces, 3 is a liquid crystal rear projector, 11 is a suspending device, 12 and 14 are a pair of left and right support members, and 12a is an angle. A support pin as an adjusting means, 14a is a frame part, 14b is a step correction part, 1
4c is a support pin which is an angle adjusting means, 13 and 15 are hanging members, and 16 is an adjuster.

Claims (5)

[Claims] 1. A liquid crystal rear projector having an upper and lower two-layer structure of an optical projection lens unit and a screen unit having a built-in reflection mirror, and a side disposed at least below the optical projection lens unit and the screen unit. A liquid crystal rear projector, wherein the liquid crystal rear projector is suspended from a ceiling, a wall, or the like by suspending members supporting both right and left sides of the liquid crystal rear projector. 2. A liquid crystal rear projector comprising an upper and lower two-layer structure of an optical projection lens section and a screen section having a built-in reflection mirror, and straddling between the left and right sides of the optical projection lens section and the screen section. Wherein the liquid crystal rear projector is suspended from a ceiling, a wall, or the like by a suspension member having a pair of left and right support members that simultaneously support the left and right sides. apparatus. 3. A liquid crystal rear projector having an upper and lower two-layer structure of an optical projection lens section and a screen section having a built-in reflection mirror, and having a step between the left and right sides of the optical projection lens section and the screen section. The liquid crystal rear is provided by a suspending member having a pair of left and right support members that straddle between the left and right side surfaces of the optical projection lens unit and the screen unit and that are attached according to the steps between the left and right side surfaces. A hanging device for a liquid crystal rear projector, wherein the projector is configured to be hung on a ceiling, a wall, or the like. 4. The liquid crystal according to claim 3, wherein said pair of left and right support members are provided with an adjuster which can be adjusted in accordance with a step between right and left side surfaces of said optical projection lens portion and said screen portion. Hanging device for rear projector. 5. The hanging of the liquid crystal rear projector according to claim 1, further comprising an angle adjusting means for the hanging member of the liquid crystal rear projector. apparatus.