JP2000125229A - Cathode ray tube display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support the weight of a cathode ray tube also by a CRT support provided to a lower side of a funnel of the cathode ray tube. SOLUTION: The cathode ray tube display device 1 where a cathode ray tube 2 is fixed to a mount frame 3 erected upright in front of the bottom plate 6 through a mount 11a of a mount band 11 that is tightened to a boundary outer circumferential face between a face section 2a and a funnel section 2b of the cathode ray tube 2 is provided with support members 9A, 9B that are erected upright at a lower part of the funnel section 2b of the cathode ray tube 2 on the bottom plate 6 and whose upper faces support the funnel section 2b of the cathode ray tube 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cathode ray tube (CR)
The present invention relates to a cathode ray tube display device in which the weight of T) is supported by a CRT support provided below a funnel portion of the cathode ray tube, thereby improving strength with a simple structure.

[0002]

2. Description of the Related Art In general, a cathode ray tube display device comprises:
As shown in FIG. 11A, a bottom plate 32 for storing and mounting circuit components, and a bezel 33 erected on the front surface of the bottom plate 32.
And a cathode ray tube 35 screwed to the bezel 33.
And a cover 36 connected to the bottom plate 32 and the bezel 33 to protect the cathode ray tube 35. As shown in FIG. 11B, the cathode ray tube 35 includes a face portion 35a serving as an image surface, a trumpet-shaped funnel portion 35b,
And a small-diameter cylindrical neck portion 35c. An explosion-proof band 38 made of steel is fastened to the outer peripheral surface of the boundary between the face portion 35a and the funnel portion 35b of the cathode ray tube 35. At four corners of the explosion-proof band 38, mounting portions 38a, which are ear portions protruding outward, are provided.
Is provided with a mounting hole. Then, the cathode ray tube 35 is connected to the screw 41 using the toothed washer 40 via the mounting portion 38a.
It is attached to the bezel 33 by the like.

[0003]

The heaviest of the cathode ray tube display devices 31 is the cathode ray tube 35.
However, as described above, in the cathode ray tube support mechanism in which the cathode ray tube 35 is screwed and attached to the bezel 33 via the attachment portion 38a of the explosion-proof band 38, all the weight of the cathode ray tube 35 is transmitted to the bezel 33, The bezel 33 is transmitted to the bottom plate 32. Therefore, in order to secure the strength of the bezel 33, it is necessary to reinforce a sheet metal or the like, and the connection between the bezel 33 and the bottom plate 32 also needs to secure the strength. However, in long-term use, a defect such as a gap between the face portion 35a of the cathode ray tube 35 and the bezel 33 has occurred due to deformation of components. Such a defect is more remarkable in a cathode ray tube display device for a personal computer that uses a stand attached to the center of the bottom plate 32. Especially in recent years,
With the increase in the size of cathode ray tube display devices and significant cost reductions, a low-cost support mechanism for easily and surely supporting the weight of the cathode ray tube is required. Therefore,
SUMMARY OF THE INVENTION It is an object of the present invention to provide a cathode ray tube display device in which the weight of a cathode ray tube is supported by a CRT support provided below a funnel portion of the cathode ray tube, thereby solving the above-mentioned problems. Is what you do.

[0004]

A cathode ray tube display device according to the present invention has a mounting frame provided upright on a front surface of a bottom plate.
In a cathode ray tube display device in which the cathode ray tube is fixed through a mounting portion of a mounting band fastened to a boundary outer peripheral surface between a face portion and a funnel portion of the cathode ray tube, the bottom plate is provided below a funnel portion of the cathode ray tube. It is provided with a support member that stands upright and supports the funnel portion of the cathode ray tube on the upper surface.

Further, in the cathode ray tube display device according to the present invention, the weight of the cathode ray tube is transmitted to the mounting frame via the mounting portion of the mounting band and also to the support member. In this case, for example, if a pair of support members are provided in the left-right direction of the cathode ray tube, the funnel portion of the cathode ray tube can be stably supported.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cathode ray tube display device according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a cathode ray tube display device according to the present invention, FIG. 2 is a rear view thereof, and FIG. 3 is an exploded perspective view thereof. As shown in FIGS. 1 to 3, the exterior of the cathode ray tube display device 1 includes a bezel 3 which is an attachment frame for attaching and fixing the cathode ray tube 2, and a cabinet 5 which covers the cathode ray tube 2.
And a bottom plate 6 supporting the bezel 3 and the cabinet 5
And a stand 7 rotatably and tiltably attached to the bottom plate 6. In the present invention, for example, a pair of left and right CRT supports 9A and 9B as support members are erected on the bottom plate 6, and the funnel portion 2b of the cathode ray tube 2 is formed by the pair of right and left CRT supports 9A and 9B.
It is intended to support.

The cathode ray tube 2 has a face 2 serving as an image surface.
a, a trumpet-shaped funnel portion 2b, and a small-diameter tubular neck portion 2c containing an electron gun (not shown). An anode 4 is provided above the funnel 2b of the cathode ray tube 2.
Is provided. The face portion 2a of the cathode ray tube 2 comes into close contact with a bezel 3 which is a front panel. A steel explosion-proof band 1 as a mounting band is provided on the outer peripheral surface of the boundary between the face portion 2a and the funnel portion 2b of the cathode ray tube 2.
1 is fastened. At four corners of the explosion-proof band 11, there are provided mounting portions 11a, which are ear portions protruding outward, and mounting holes 11a-1 for screwing are formed at the centers of the protruding surfaces of the mounting portions 11a. . A screw 13 is inserted into a mounting hole 11a-1 of the mounting portion 11a, and the cathode ray tube 2 is mounted on the bezel 3 by tightening the four screws 13.

A pair of CRT supports 9A and 9B are provided upright at predetermined intervals in the left-right direction below the funnel portion 2b of the cathode ray tube 2 inside the bottom plate 6.
The funnel 2b of the cathode ray tube 2 is supported on the upper surfaces of the RT supports 9A and 9B. FIG. 4 is a perspective view showing a CRT support. A pair of CRT supports 9 includes a left CRT support 9A and a right CRT support 9B, and has curved surfaces 9A-1 and 9B-1 on the upper surfaces, respectively. The curved surfaces 9A-1 and 9B-1 are curved so as to be in close contact with the funnel portion 2b of the cathode ray tube 2, respectively.
It is formed symmetrically with respect to the center line of the cathode ray tube 2. The CRT support 9 is provided by the curved surfaces 9A-1 and 9B-1.
A and 9B can stably support the funnel portion 2b of the cathode ray tube 2 without rattling in the left-right direction.

As shown in FIG. 3, a stand 7 is provided on the outer lower surface of the bottom plate 6. This stand 7
Is composed of a stand base 15 and a bowl-shaped mounting base 16 mounted on the upper surface thereof. Mounting base 16
Is fixed to the bottom plate 6 so as to be rotatable with respect to the stand 15 and to be tilted over a predetermined angle range.

Therefore, the funnel portion 2b of the cathode ray tube 2 can be stably supported by the pair of CRT supports 9A and 9B having the curved surfaces 9A-1 and 9B-1 without rattling. To prevent the inclination of the cathode ray tube 2 and the weight of the cathode ray tube 2 is not directly applied to the bezel 3.
The bezel 3 can be prevented from being deformed.

Further, since the entire weight of the cathode ray tube 2 does not directly hit the bezel 3, it is not necessary to reinforce the bezel 3 with a sheet metal or the like in order to secure the strength of the bezel 3, and the structure of the joint between the bezel 3 and the bottom plate 6 can be simplified. Therefore, cost can be reduced.

FIG. 5 shows a CRT support of a cathode ray tube display device according to a second embodiment. A pair of CRT supports 20 include a left CRT support 20A and a right CRT support 20B, each having a first curved surface on the upper surface. Certain curved surfaces 20A-1 and 20B-1 and curved surface 2 as a second curved surface
0A-2 and 20B-2 are provided. FIG. 6 is a schematic side view showing an attached state of a cathode ray tube and a CRT support. As shown in FIG. 6A, a CRT support 2 is provided on a funnel portion of a small cathode ray tube 21 which is a first cathode ray tube.
Curved surfaces 20A-1, 2A, which are the first curved surfaces of OA and 20B.
0B-1 is close. As shown in FIG. 6B, the funnel portion of the large cathode ray tube 22, which is the second cathode ray tube, has curved surfaces 20A-2, 20B-, which are the second curved surfaces of the CRT supports 20A, 20B. The two are close. Other configurations are the same as those of the first embodiment.

Therefore, the same pair of CRT supports 20
A, two types of cathode ray tubes 21 having different sizes depending on 20B,
22 funnel portions can be supported. Thus, when a large number of cathode ray tubes having different sizes are used in the same chassis, CRT supports having different curved surfaces may not be used, and a common CRT support may be used, which is extremely advantageous.

FIG. 7 is a schematic side view showing a cathode ray tube display device according to a third embodiment, FIG. 8 (a) is a rear view of the cathode ray tube, and FIG. 8 (b) is an enlarged view of the projection from obliquely below. FIG. 9 is a perspective view showing a CRT support. As shown in FIGS. 7 and 8, a pair of first projections 26 are provided on the lower surface of the funnel portion of the cathode ray tube 25 at a predetermined interval, and the lower surface of the projection 26 is a flat surface 26a. I have. Then, as shown in FIG.
The upper surface of the RT support 27 is a flat surface 27a.
The plane 27 of the CRT support 27 is placed on the plane 26a of the projection 26.
a is closely contacted, and the funnel portion of the cathode ray tube 25 is
It is supported by the RT support 27. Other configurations are the same as those of the first embodiment.

Therefore, the rearward inclination of the cathode ray tube 2 can be more reliably prevented by the projection 26 having the flat surface 26a on the lower surface of the cathode ray tube and the CRT support 27 having the flat surface 27a on the upper surface. Although the pair of projections 26 are provided on the lower surface of the funnel portion of the cathode ray tube 25, the invention is not limited thereto, and a single rib-shaped projection extending in the left-right direction on the lower surface of the funnel portion of the cathode ray tube 25 may be used. .

FIG. 10 shows a cathode ray tube display device according to a fourth embodiment, in which (a) is a side view and (b) is a back view. A protrusion 29 which is a rib-shaped second protrusion extending in the left-right direction on the lower surface of the funnel portion of the cathode ray tube 28.
1 are provided by the rib-shaped projections 29.
In addition to the positioning of the CRT support 9 shown in FIG. 7, the rearward inclination of the funnel portion of the cathode ray tube 28 and the sliding of the funnel portion of the cathode ray tube 28 with respect to the CRT support 9 can be prevented more reliably. Further, the rib-shaped projections 29 allow not only positioning with respect to the rear of the cathode ray tube 28 but also positioning in the left-right direction with both ends of the projections 29.

In the first to fourth embodiments, a pair of CRT supports are disposed below the funnel portion of the cathode ray tube. However, the present invention is not limited to this. Alternatively, one may be arranged at the lower central portion of the funnel portion of the cathode ray tube.

Further, the stand is provided on the outer lower surface of the bottom plate. However, the present invention is not limited to this. Needless to say, the stand may not be provided.

[0019]

As described above, according to the first aspect of the present invention, the funnel portion of the cathode ray tube can be supported by the support member, and the entire weight of the cathode ray tube does not directly fall on the mounting frame. It is possible to prevent the mounting frame from being deformed.

Further, since the entire weight of the cathode ray tube does not directly fall on the mounting frame, it is not necessary to reinforce the mounting frame with a sheet metal or the like in order to secure the strength of the mounting frame, and the structure of the joint between the mounting frame and the bottom plate can be simplified. Therefore, cost can be reduced.

According to the second aspect of the present invention, since the support member has the first curved surface for making close contact with the funnel portion of the cathode ray tube, the support member is stabilized without rattling the funnel portion of the cathode ray tube. Can be supported.

According to the third aspect of the present invention, since the supporting member has the first curved surface and the second curved surface which are adapted to the funnel portions of the cathode ray tubes having different sizes, the same supporting member is provided. The members can support the funnel portions of two types of cathode ray tubes having different sizes.When a large number of cathode ray tubes having different sizes are used in the same chassis, it is not necessary to use a support member having a different curved surface. A common support member is sufficient, which is extremely advantageous.

According to the fourth aspect of the present invention, the first projection having a flat surface on the lower surface of the cathode ray tube and the supporting member having a flat surface on the upper surface can more reliably prevent the rearward inclination of the cathode ray tube. Can be.

According to the fifth aspect of the present invention, the second projection can more reliably prevent the rearward inclination and slip of the funnel portion of the cathode ray tube. Furthermore, not only the positioning with respect to the rear of the cathode ray tube but also the second projection,
Positioning in the left-right direction can be performed by both ends of the second projection.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing a cathode ray tube display device according to the present invention.

FIG. 2 is a rear view of the cathode ray tube display device according to the present invention.

FIG. 3 is an exploded perspective view of a cathode ray tube display device according to the present invention.

FIG. 4 shows a CR of a cathode ray tube display device according to the present invention.
It is a perspective view showing a T support.

FIG. 5 is a perspective view showing a CRT support of the cathode ray tube display device according to the second embodiment.

FIG. 6 is a schematic side view showing a state in which a cathode ray tube and a CRT support according to the second embodiment are mounted.

FIG. 7 is a schematic side view showing a cathode ray tube display device according to a third embodiment.

8A and 8B show a cathode ray tube according to a third embodiment, wherein FIG. 8A is a rear view thereof, and FIG. 8B is an enlarged perspective view of a protruding portion.

FIG. 9 is a perspective view showing a CRT support of the cathode ray tube display device according to the third embodiment.

FIGS. 10A and 10B show a cathode ray tube display device according to a fourth embodiment, wherein FIG. 10A is a side view and FIG.

FIG. 11 shows a conventional cathode ray tube display device,
(A) is a side view thereof, and (b) is a side view of a cathode ray tube alone.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cathode ray tube display device, 2 ... Cathode ray tube, 2a ... Face part, 2b ... Funnel part,
2c: neck part, 3: bezel (mounting frame), 5.
..Cabinet, 6 bottom plate, 7 stand,
9A, 9B ... CRT support (support member), 9A-
1, 9A-2: curved surface, 11: explosion-proof band (band for mounting), 11a: mounting section, 11a-1: mounting hole, 13: screw, 20A, 20B ..CRT support (support member), 20A-1, 20B-1 ... curved surface (first curved surface), 20A-2, 20B-2 ... curved surface (second curved surface), 21 ... Small cathode ray tube (first cathode ray tube), 22 ... large cathode ray tube (second cathode ray tube), 26 ... projection (first projection), 27 ... CR
T support (supporting member), 29... Projection (second projection)

Claims (6)

[Claims] 1. A cathode ray tube is fixed to an attachment frame erected on a front surface of a bottom plate via an attachment portion of an attachment band fastened to a boundary outer peripheral surface between a face portion and a funnel portion of the cathode ray tube. A cathode ray tube display device, comprising: a support member that stands upright below a funnel portion of the cathode ray tube on the bottom plate and supports a funnel portion of the cathode ray tube on an upper surface. 2. The cathode ray tube display device according to claim 1, wherein the support member has a first curved surface on an upper surface for making close contact with a funnel portion of the first cathode ray tube. . 3. The upper surface of the supporting member has a second curved surface for making close contact with a funnel portion of a second cathode ray tube having a size different from that of the first cathode ray tube. The cathode ray tube display device according to claim 2. 4. The cathode ray tube has a first projection having a flat lower end at a lower portion of a funnel portion, and the support member has a flat surface on an upper surface for closely contacting a lower end of the first projection. The cathode ray tube display device according to claim 1, wherein: 5. The cathode ray tube according to claim 1, wherein the cathode ray tube has a second projection for abutting a rear end of the support member at a lower portion of the funnel portion to regulate sliding of the funnel portion. 2. The cathode ray tube display device according to 1. 6. The CRT display device according to claim 1, wherein a plurality of the support members are provided at predetermined intervals in the left-right direction of the CRT.