JPH081992B2 - CRT holding device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for holding a cathode ray tube used inside products such as measuring instruments.

2. Description of the Related Art Conventionally, this type of cathode ray tube holding device is configured as shown in FIGS. 3 and 4. That is, the outside of the product 2 is a box-shaped case 4, of which the front is
A panel 12 having a window 10 for exposing the screen 8 of the cathode ray tube 6 is attached by a screw 13. A recess 14 for supporting the screen 8 of the CRT 6 is formed on the back side of the window 10. Behind the cathode ray tube 6,
The cylindrical projecting portion 16 projects. A cushion 18 made of sponge is attached to the protruding portion 16 in advance so as not to scratch the glass surface, and a flat plate-shaped material is wound on the cushion 18 to form a shield pipe 20, which is fixed by a fastener 22. . There is a band behind this shield pipe 20
24 is wound and attached to the case 4. That is, the band 24 is fixed to the case 4 with the screw 26 2
It has a leg 28 of a book and a ring-shaped part 30 supported by these two legs 28, the ring-shaped part 30 being divided at the top to form two flanges 32. This flange 32
Is fastened with screws 34, and the shield pipe 20
The projection 16 of the CRT 6 is tightened from above.

DISCLOSURE OF INVENTION Problems to be Solved by the Invention However, in the above-described conventional CRT holding device,
When tightening the band 24 with the screw 34, the CRT 6 is held tilted due to this tightening condition,
There was a problem that alignment was not easy.

Further, the cushion 18 is required to attach the shield pipe 20, which not only increases the number of parts but also makes it difficult to assemble the product.

Further, according to the above conventional structure, there is a problem that the number of shield pipes 20 cannot be increased.

The present invention solves such a conventional problem, that is, the cathode ray tube is not tilted, alignment is easy, the number of parts is small, assembly work is easy, and the number of shield pipes is easily increased. It is an object of the present invention to provide a holding device for a CRT capable of performing the above.

Means for Solving the Problems The present invention has been made to achieve the above object,
1st invention hold | maintains the cylindrical protrusion part which protrudes to the back of a cathode ray tube by the resin-made holder fitted on an outer periphery at two places of the said cylindrical longitudinal direction, and the holding end part of each holder is,
A ring-shaped claw having elasticity for strengthening the fitting is formed, and at least the front holder is formed with an enlarged diameter portion that abuts along the shape of the cathode ray tube.

Further, according to the second invention, each holder has the same shape, and a plurality of ring-shaped grooves are concentrically formed at opposing ends, and both ends of a plurality of shield pipes are engaged with these grooves. It was done.

Therefore, according to the first invention or the second invention, unlike the conventional case, a band for tightening the protruding portion of the cathode-ray tube is not used, and it is held by two resin holders fitted to the outer periphery at two positions in the longitudinal direction of the protruding portion. As a result, the cathode ray tube does not tilt with the tightening of the band, and the alignment is easy.

Further, according to the second aspect of the invention, since the shield pipe is engaged with and supported by the groove of the holder, it does not come into contact with the glass surface of the cathode ray tube, and a cushion is not required as in the conventional case. Therefore, the number of parts can be reduced and the product assembling work is easy. Moreover, the number of shield pipes can be increased by forming a plurality of grooves concentrically.

EXAMPLE FIG. 1 and FIG. 2 show the structure of a holding device for a cathode ray tube according to an example of the present invention. FIG. 1 is an exploded perspective view, and FIG. 2 is a vertical sectional side view. The same parts as those in the conventional example (FIGS. 3 and 4) are designated by the same reference numerals.

The product 2 in which the cathode ray tube is used in this embodiment is a measuring instrument. The outer side of this product 2 consists of a white box-shaped case 4 made of metal on the back and sides, and a resin panel 12 on the front.
It consists of On the panel 12, the screen 8 of the cathode ray tube 6
A window 10 is formed for exposing. A recess 14 for supporting the screen 8 of the cathode ray tube 6 is formed on the back side of the window 10. The recess 14 may not be formed. The panel 12 is fixed to the case 4 with screws 13. Cylindrical protrusion 16 protruding rearward of the cathode ray tube 6
Is held by two holders 36 made of resin.
The holder 36 is fitted to the outer periphery of the protruding portion 16 at two locations in the tubular longitudinal direction. The two holders 36 have the same shape. That is, it is composed of a small diameter portion 38 having an inner diameter equal to the outer diameter of the protruding portion 16 and an enlarged diameter portion 42 having an inner diameter conforming to the shape of the connecting portion 40 between the protruding portion 16 and the main body of the cathode ray tube 6. . In this embodiment, the two holders 36 have a small diameter portion 38.
The fitting is performed with the holding ends of the two facing each other. A claw 44 for strengthening the fitting is formed at this end. The claw 44 has elasticity and has a ring shape. Further, two ring-shaped grooves 4 are provided on the outer peripheral side of the claw 44.
6,48 are formed. These grooves 46 and 48 are formed concentrically, and have dimensions such that both ends of the shield pipes 50 and 52 can be engaged and held.

Further, the holder 36 has a side portion on which a mounting portion for the case 4 is attached.
54 are formed. A screw hole 56 is formed in the mounting portion 54. The case 4 is formed with a long hole 60 through which a screw 58 screwed into the screw hole 56 passes. The elongated hole 60 allows the holder 36 to be attached while the protrusion 16 of the cathode ray tube 6 is axially pressed.

The assembly work of this embodiment will be described below. First, the holder 36 on the front side is fitted to the protruding portion 16 of the cathode ray tube 6. At this time, the expanded diameter portion 42 is brought into contact with the main body side of the cathode ray tube 6. Next, two shield pipes 50,52
Is passed through the protrusion 16, and the holder 36 on the rear side is further fitted.
Both ends of each of the two shield pipes 50, 52 are supported by engaging the two holders 36 with the grooves 46, 48. At this time, the inner shield pipe 50 does not come into contact with the protruding portion 16 and there is no fear of damaging the glass surface, so that a conventional sponge is not necessary. In this state, screws 58 are screwed into the screw holes 56 of the mounting portions 54 of the two holders 36 from the outside of the case 4. At this time, the position of the holder 36 in the front-rear direction can be adjusted by the action of the long hole 60 of the case 4, and the claw 44 of the holder 36 can strongly fit the protrusion 36. Then, the panel 12 is attached to the case 4 with screws 13.

According to the above embodiment, the cathode ray tube 6 does not tilt even if the screw 60 is tightened, and the cathode ray tube 6 does not tilt.
Is easy to align. Further, compared to the conventional case, the cushion 18 and the fastener 22 (see FIG. 3) are unnecessary, the number of parts is reduced, and the product assembling work is easy. Further, in order to improve the shielding property of the cathode ray tube 6, it is possible to support the two shield pipes 50 and 52 without contacting each other.

Also, the two holders 36 can have the same shape,
The manufacturing cost of parts can be reduced.

EFFECTS OF THE INVENTION As is apparent from the above-described embodiment, the present invention holds a CRT by a resin holder fitted in two positions in the longitudinal direction of the projection of the CRT, and it is necessary to use a band as in the conventional case. It is possible to prevent the cathode-ray tube from tilting due to the tightening of the band, and it is easy to align the position.

Further, in the second invention, since the shield pipe is engaged with and supported by the grooves formed at the opposite ends of the two holders, the shield pipe does not come into contact with the glass surface of the cathode ray tube. No need for sponge as in the past. Therefore, the number of parts can be reduced and the product assembling work becomes easy. Further, by forming a plurality of the grooves, it is easy to increase the number of shield pipes.

[Brief description of drawings]

1 is an exploded perspective view of a holding device for a cathode ray tube according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional side view of FIG. 1, and FIG.
FIG. 4 is an exploded perspective view showing a conventional example, and FIG. 4 is a vertical sectional side view of FIG. 4 …… Case, 6 …… CRT, 10 …… Window, 12 …… Panel, 18 …… Cushion, 20,50,52 …… Shield pipe, 22 …… Fastener, 24 …… Band, 28 …… Legs , 34 ...
… Screws, 36 …… Holder, 42… Expanded part, 44 …… Claw, 54…
… Mounting part, 60 …… slot.

Claims (2)

[Claims] 1. A cylindrical protrusion protruding rearward of a cathode ray tube is held by resin holders fitted to the outer periphery at two locations in the cylindrical longitudinal direction, and the holding end of each holder is
A holding device for a CRT, wherein a ring-shaped claw having elasticity for strengthening the fitting is formed, and at least a front-side holder is formed with an enlarged diameter portion that abuts along the shape of the CRT. 2. Each holder has the same shape, and a plurality of ring-shaped grooves are concentrically formed at opposing holding ends, and both ends of a plurality of shield pipes are engaged with these grooves. The device for holding a cathode ray tube according to claim 1.