JP2986990B2 - Projection display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection display device.

[0002]

[Prior art]

JP-A-56-116380 As a conventional apparatus, there is generally known an apparatus as described in JP-A-56-116380, in which a projection unit is pulled out from a projection display main body and used.

[0003]

The prior art described above does not consider the case where the projection unit is pulled out to a wide place away from the display body in order to improve maintenance workability. In some places, there was a problem that maintenance work was difficult. In addition, in the case described above, when the weight of the projection unit is very large, a large force is required to pull out or store the projection unit from the display body,
There was a problem that many maintenance personnel were required. Also,
Similarly, in a place where the weight of the projection unit is large, when the projection unit is stored in the display main body, the projection unit collides with the display main body, and the weight does not allow freedom. Further, there is a problem that the display body is deformed or damaged due to excessive work and excessive force. Further, as another problem, in the prior art, if the display main body is not provided with considerable rigidity, the display main body is slightly deformed due to the unevenness of the floor surface and the weight of the projection unit, and optical distortion appears. There was a problem that it would. Even if the display is moved once and the display itself is moved, the situation on the floor surface will change, so the distortion must be adjusted each time, which is extremely inconvenient. there were.

An object of the present invention is to solve the above problems.

[0005]

In order to achieve the above object, a projection type display device according to the present invention is provided with a rolling member on one of a side frame of a display body and a mounting device of a projection unit, and a rolling member on the other. A rail is provided for engaging the rolling element. In addition,
When the mounting device is on the floor,
And the display body is on the floor.
This is a structure that is installed with three legs.

Further, a guide is provided which satisfies dimensions so that the projection unit does not hit the display body.

Further, in order to prevent the display main body from being affected by the unevenness of the floor surface, the mounting device of the projection unit is constituted by three legs, and the mounting device and the display main body are bolted from the vertical direction to thereby fix the display main body. Is a structure that lifts off the floor.

[0008]

When the mounting device of the projection unit is pulled out of the display main body or when the device is stored, the rolling element reduces friction so that work can be performed with a relatively small and stable force, and maintenance personnel can be reduced.

When the projection unit is housed in the display main body, the positioning guide guides the mounting device straight and parallel to the display main body, so that workability is good and the display main body is not deformed or damaged.

[0010] Since the display main body is mounted on a mounting device and the mounting device is installed on the floor with three legs, the installation surface is always flat, and optical distortion due to the unevenness of the floor surface is almost impossible. Absent.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the projection type display device of the present invention will be described below with reference to the drawings.

1 to 8, a cabinet-type projection display device includes a display body A.
, A projection unit 9 and a mounting device 8 on which the projection unit 9 is mounted and which can be moved in and out of the lower cabinet 1a of the display body A. The display main body A has an upper cabinet 1, and a screen 2 is fixed to a front portion of the upper cabinet 1 by using a frame 2a. Below the upper cabinet 1, a lower cabinet 1a is provided, and the lower cabinet 1a is
It comprises at least one pair of side frames 6. At the front of the side frame 6, a front cover 5 is provided detachably or rotatably, and at the rear, a rear cover 7 having a hole 7a is provided.
Is preferably provided. A pair of side frames 6 is provided with a bracket 6a extending inward below the pair of side frames 6, a lower portion of which is appropriately provided with wheels 6b such as casters, and a rail having a hole 12a and a taper 12b at an upper portion thereof. 12 are provided. On the front cover 5,
As is known, a switch knob 3 and an indicator 4 are provided.

The mounting device 8 has a chassis 8a, the chassis 8a is provided with a hole 8b, and wheels 8c such as casters are provided below the chassis. On the upper part of the chassis 8a, a portal bracket 8d that supports the projection unit 9 having the projection tube 9a is provided upright, and a handle 8e is provided on the bracket 8d.
A bracket 10 projects from both sides of the chassis 8a. The bracket 10 is provided with a loose fitting hole 10a corresponding to the screw hole 12a, and a projection 10b is provided at a lower portion of the bracket 10 as necessary. I have. A hanging flange 10c is provided at the outer end of the bracket 10, and the flange 10c and the side surface of the chassis constitute guide means. Furthermore, the chassis 8a has the rail 1
A cylindrical rolling element or roller or cam follower 11, which rolls on 2, is mounted via a bracket 11a. The height H ((b) in FIG. 4) of the lower surface of the protrusion 10b or the lower surface of the bracket 10 (when the protrusion 10b is not provided) from the floor surface 16 is determined by the upper surface of the rail 12 or the roller or cam follower 11. Height h from lower floor 16
(See FIGS. 6 and 7).

3 to 8, when the projection unit 9 is accommodated in the lower cabinet 1a, the roller 11 provided on the mounting device 8 is guided by the taper 12b even if the floor 16 has some irregularities. Roll over 12
Here, since the height H from the floor 16 is slightly larger than the height h of the roller 11 from the floor 16 as described above, the projection 10 b has the projection unit 9 and the mounting device 8.
Will be received by the roller 11 approximately. Thus, even when the weight of the projection unit 9 and its mounting device 8 is very large, there is no increase in frictional resistance due to the sliding wear of the projection 10b, and the roller 11 rolls on the rail 12 to reduce the frictional resistance. Work can be performed with a relatively small force and a stable force for a long period of time, workability is good, and the number of workers can be reduced. Further, by loosely fitting a bolt having a collar 13a into the hole 10a and screwing it into the screw hole 12a, the projection unit can be positioned vertically relative to the screen 2 or the like.

The horizontal gap y between the flange 10 and the rail 12 is determined by the side of the chassis 8a and the bracket 6a.
a or the horizontal gap x with the rail 12. Explaining the reason, x, as described above,
If the dimension of y is not determined, as shown in FIG. 9, when the mounting device 8 is stored in the lower cabinet 1a, it is difficult to insert the mounting device 8 in a straight line because of work variation. For the lower cabinet 1a
As a result, the corner 8g of the mounting device 8 hits the side frame 6 obliquely. At this time, the side frame 6 is excessively deformed in the direction of the arrow 15 or damaged. However, in this embodiment, the dimension y is set so that the guide 10 is sandwiched between the rails 12 and the corner 8g does not hit the side frame 6.
Is smaller than the dimension x, and the mounting device 8 is guided substantially straight and parallel to the lower cabinet 1a, so that there is no fear of deformation and breakage as described above.

FIG. 10 shows another embodiment of the present invention.
In the figure, a rolling body 21 shown as a ball
Is provided on the bracket 6a side of the side frame 6,
The spring is urged upward by a spring (not shown) and is retained.

FIG. 11 shows still another embodiment of the present invention. In FIG. 11, instead of the configuration of the bracket 10 shown in FIG. 3, a groove 12c is provided on the rail 12 in accordance with the width of the roller or the rolling portion of the cam follower 11, and the projection unit is stored straight and parallel to the lower cabinet 1a. It is configured as a contributing guide means.

FIGS. 12 to 14 show another embodiment of the present invention. In these figures, three wheels 8c are arranged at triangular points below the mounting device 8. Display body A, bracket 6a of side frame 6
The space and the bracket 10 of the mounting device are appropriately spaced apart from the height z shown in FIG. Further, in this embodiment, instead of the roller 11 or the ball 21, a caster or a wheel 8 c becomes a rolling body. With the above configuration, the display main body A, that is, the bracket 6a of the side frame 6, and the bracket 10 of the mounting device 8 are mounted on the floor 16 because the casters 6a float from the floor 16 when the bolts 13 are tightened. The surface 18 is always one plane. On the other hand, if the number of the casters 8c is four or more and the casters 6b are not allowed to float on the floor 16, the installation surface 17 on the floor 16 has many surfaces. In many cases, the floor surface 16 has irregularities, and when the number of installation surfaces is large, not only does the projection display device, that is, the set play, but also the mounting device 8 is deformed due to the weight of the projection unit 9 and the like. Distortion occurs. Since the optical distortion is affected by the unevenness of the floor surface 16,
When you move the set, the degree of distortion is different. Therefore, every time you move the set, optical adjustment is required,
Very inconvenient. However, in this embodiment, the installation surface 18 on the floor 16 is always a single plane, which not only eliminates backlash of the set but also eliminates the need for optical adjustment when the set is moved. Very convenient.

[0019]

According to the present invention, a display body comprising an upper cabinet having a screen at the front and a lower cabinet having a pair of side frames and supporting the upper cabinet, a projection unit, and the projection unit In a projection type display device comprising a mounting unit and a mounting device which can be moved in and out of the lower cabinet, one of the side frames and the mounting device is provided with a rolling member, and the other is connected to the rolling member. Since the matching rails are provided, when the mounting device is moved in and out of the display main body, the rolling body reduces friction so that maintenance work can be performed with a relatively small force. Also,
In the form of the projection display described above,
The three-point support structure does not deviate from the spirit of the present invention.
It goes without saying that various modifications are possible within the range, and FIG.
As shown in FIG. 5, 3
The six wheels 6b are provided at triangular points, and will be described with reference to FIGS.
The mounting device 8 may be lifted off the floor in the same configuration as
No.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a projection display apparatus of the present invention.

FIG. 2 is a view showing a state where a mounting device of the projection display device of FIG. 1 is pulled out.

FIG. 3 is a detailed perspective view showing a mounting device and a side frame of a lower cabinet in FIG. 2;

FIG. 4 is a longitudinal sectional front view showing a connecting portion between the mounting device and the side frame.

FIG. 5 is a diagram showing a rolling relationship between a mounting device and a side frame.

FIG. 6 is a diagram illustrating heights of rollers of the mounting device.

FIG. 7 is a diagram showing the height of a rail of a side frame.

FIG. 8 is a vertical sectional front view showing a clearance between the mounting device and the lower cabinet in the left-right direction.

FIG. 9 is a bottom view showing the operation when the mounting device is stored in the lower cabinet.

FIG. 10 is a longitudinal sectional front view showing a second embodiment of the present invention.

FIG. 11 is a longitudinal sectional front view showing a third embodiment of the present invention.

FIG. 12 is a bottom view showing a fourth embodiment of the present invention.

FIG. 13 is a vertical sectional front view showing a relationship between a mounting device and a lower cabinet according to a fourth embodiment of the present invention.

FIG. 14 is an explanatory diagram regarding functions of wheels of a mounting device according to a fourth embodiment of the present invention.

FIG. 15 is a modification of the fourth embodiment of the present invention to other means.
It is a bottom view.

[Explanation of symbols]

 A: Display body 1: Upper cabinet 1a: Lower cabinet 2: Screen 6: Side frame 6a, 10 ... Bracket 6b, 8c ... Wheels 8: Mounting device 9: Projection unit 10c: Flange 11, 12: Rolling body 12: Rail 13 ... bolt

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kofune Ichikawa 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Hitachi, Ltd. Information Video Development Center (72) Inventor Akio Yamamoto 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Address: Hitachi, Ltd. Information Video Development Center (72) Inventor: Chuichi Matsubara 216, Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture, Hitachi Information & Video Development Center (56) Reference: Japanese Utility Model, Sho 64-37181 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03B 21/00 G03B 21/10 H04N 5/74

Claims (4)

(57) [Claims] 1. A display comprising: an upper cabinet having a screen at a front portion; and a lower cabinet having a pair of side frames and supporting the upper cabinet.
A projection type display device comprising: a main body, a projection unit, and a mounting device on which the projection unit is mounted and which can be moved in and out of the lower cabinet, wherein one of the side frame and the mounting device rolls. A projection display device, comprising a body and a rail provided on the other side for engaging with the rolling body. 2. The projection display apparatus according to claim 1 , wherein three wheels are provided at a lower portion of the display main body at triangular points.
Rolling body installed on the projection unit mounting device
Or the rails that engage the rolling elements
B When the main unit and the mounting device are combined,
A projection type display device characterized in that it can be floated from above . 3. A projection display apparatus according to claim 1.
In the mounting device, left and right positioning guides are installed
Projection display apparatus characterized by digit. 4. An upper cabinet having a screen at the front.
And a top cabinet having a pair of side frames.
Display consisting of a lower cabinet supporting the unit
A main body, a projection unit, and the projection unit
Mounting device that can be moved in and out of the lower cabinet
A projection display device comprising:
At the bottom of the device, three wheels are arranged at triangular points, and the bracket
There is sufficient vertical space inside and outside the mounting equipment.
And two opposite brackets.
Provide screw means between the rackets and tighten the screw means
The display body can be lifted off the floor
A projection display device characterized by the above-mentioned.