JPH0543579Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" (Field of industrial application) This invention relates to a mounting device for cathode ray tubes used in measuring instruments, etc., and in particular, it ensures ease of mounting and reliable retention of cathode ray tubes. The present invention relates to a mounting device that allows for

(Prior Art) An example of a structure for mounting a cathode ray tube in a conventional measuring instrument is as shown in FIG. In the figure, 31 is a cathode ray tube, 32
33 is a chassis having a cathode ray tube mounting window 40;
3 is a holding mechanism for holding the tapered surface 34 in the funnel portion of the cathode ray tube 31; 38 is a mounting bracket installed upright on the chassis 32 for fixing the holding mechanism 33; 44 is a mounting bracket for fixing the tube surface of the cathode ray tube to the mounting window 40. Shows the bezel. The holding mechanism 33 has a rotator coil 45 disposed on its outer circumferential surface, and a holding frame 36 having a large number of pressing pieces 35 protruding from its inner circumferential edge is resiliently held by the mounting bracket 38 via a coil spring 37. By arranging the rear surface portion 43 of the cathode ray tube 31 to protrude from the hole 42 formed in the mounting bracket 38 through the center hole 41 of the holding frame 36, the pressing piece 35 can press the tapered surface of the cathode ray tube 31. 34 is pressed and held.

(Problems to be Solved by the Invention) In the conventional CRT mounting structure described above, when the holding mechanism 33 is attached to the mounting bracket 38, it is held using a stepped screw 39 via a coil spring 37. The installation work is troublesome, and since the rear side of the cathode ray tube 31 is held via an elastic pressing piece 35 and a coil spring 37, it becomes unstable, and there is play in the cathode ray tube especially due to vibration. There was a drawback that it could not be held securely. Moreover, in the conventional type, the coil spring 37
Since it uses stepped screws 39, it also has the disadvantage of increasing costs.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks,
To provide a cathode ray tube mounting structure capable of properly fixing and holding a cathode ray tube with a simple and inexpensive structure and facilitating the work of mounting the cathode ray tube.

"Structure of the invention" (Means for solving problems) The mounting structure of the cathode ray tube according to the invention consists of a bezel for fixing the tube surface of the cathode ray tube to the cathode ray tube mounting window, and a chassis etc. to be mounted on the back side of the cathode ray tube. In a cathode ray tube mounting device comprising a mounting bracket erected from a base and a holding mechanism fixed to the mounting bracket for fixing and holding a funnel portion of the cathode ray tube, the holding mechanism a holding frame in which a rotator coil to be brought into contact with the funnel portion of the tube is disposed on the front side; a plate spring-like pressing piece that projects rearward from the holding frame and resiliently comes into contact with the mounting bracket; and a CRT. A fastening piece extends rearward from the holding frame to tighten and fix the neck portion of the holding frame.

(Function) The mounting bracket is fixed at a predetermined position on a mounting board such as a chassis, and the holding mechanism is slidably held by this, and the rear end of the CRT is inserted into the holding frame, and the tube surface of the CRT is attached to the bezel. Then fix it to the CRT mounting window. In this case, by inserting the rear end of the cathode ray tube into the holding frame, the holding frame is pushed rearward, and the pressing piece comes into pressure contact with the mounting bracket, so that the cathode ray tube is accurately positioned.
The cathode ray tube is firmly held by tightening and fixing the neck portion of the cathode ray tube with the fastening piece and fixing the holding mechanism to the mounting bracket. Further, as a result, the rotator coil disposed on the front side of the holding frame is fixed to the cathode ray tube by pressure contact.

(Embodiment) An embodiment of the cathode ray tube mounting structure according to the present invention will be described based on the cross-sectional view of FIG. bezel 2, and a mounting base 3 for a chassis etc. on the back side of the cathode ray tube 1.
It consists of a mounting bracket 4 erected from the mounting bracket 4 and a holding mechanism 6 which is fixed to the mounting bracket 4 and holds the funnel portion 5 of the cathode ray tube 1 fixedly. A rotator coil 8 to be brought into contact with the funnel portion 5 of the cathode ray tube 1 is disposed on the front side of the holding frame 7, and resiliently brought into contact with the mounting fitting 4 rearwardly from the holding frame 7. In addition, a clamping piece 10 is provided rearwardly from the holding frame 7 to tighten and fix the neck portion 11 of the cathode ray tube 1.
It is an extension of .

To explain the above configuration in detail, the bezel 2 attaches the tube surface of the cathode ray tube 1 to the cathode ray tube mounting window 13 with screws 12.
This is the same as the conventional one. The mounting bracket 4 is fixed to the mounting base 3 with screws 14, and the fastening piece 1 is provided in the center.
A window 15 is formed through which 0 is inserted, and a mounting flange 16 is provided to protrude inward. In the holding mechanism 6, the rotator coil 8 is arranged on the front side of the holding frame 7, and a mounting flange 17 is provided on the outer edge of the holding frame 7. It is designed to be able to slide, and is fixed with screws 18 during installation. On both sides of the holding frame 7, pressing pieces 9, 9 shaped like leaf springs are formed in a ``V'' shape and are adapted to resiliently abut against the mounting bracket 4. A fastening flange 1 is attached to a fastening piece 10 extending rearward from the holding frame 7.
9 is formed so that the neck portion 11 of the cathode ray tube 1 is tightened and fixed with a tightening screw 20.

"Effects of the invention" According to the cathode ray tube mounting device according to the invention,
When installing a cathode ray tube, fix the mounting bracket in a predetermined position on the mounting board such as a chassis, allow the holding mechanism to slide freely, and insert the rear end of the cathode ray tube into the holding frame. is fixed to the CRT mounting window by a bezel, but in this case, when the rear end of the CRT is inserted into the holding frame, the holding frame is pushed backward and the pressing piece comes into pressure contact with the mounting bracket. Therefore, the cathode ray tube can be positioned accurately. Next, by tightening and fixing the neck part of the cathode ray tube with the fastening piece and fixing the holding mechanism to the mounting bracket, the cathode ray tube can be firmly held. The rotator coil can be fixed to the cathode ray tube by pressure contact.

In this way, positioning of the cathode ray tube is easy, and the neck part of the rear part of the cathode ray tube is fastened and held by a fastening piece, and the holding frame itself is attached to a mounting bracket that is erected on the mounting base of a chassis, etc. Since the rear part of the cathode ray tube can be fixed without intervening any other means, the rear part of the cathode ray tube can be securely fixed, and there is no possibility that the cathode ray tube holding mechanism will have play due to vibration or the like. In addition, the structure is simple and the installation operation is easy, and costs can be reduced because coil springs and stepped screws are not used as in the prior art.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a cathode ray tube mounting device according to the present invention, and FIG. 2 is a sectional view showing a conventional cathode ray tube mounting structure. 1... Braun tube, 2... Bezel, 3... Mounting base, 4... Mounting bracket, 5... Funnel part,
6... Holding mechanism, 7... Holding frame, 8... Rotator coil, 9... Pressing piece, 10... Fastening piece, 11
...Netsuku section, 13...CRT mounting window.

Claims (1)

[Claim for Utility Model Registration] A bezel for fixing the surface of the CRT to the CRT mounting window, a mounting bracket that stands up from a mounting base such as a chassis on the back side of the CRT, and a bezel that is fixed to the mounting bracket. In this CRT mounting device, the CRT includes a holding mechanism for fixing and holding the funnel of the CRT. A holding frame, a leaf spring-like pressing piece that projects rearward from the holding frame and resiliently contacts the mounting bracket, and extends rearward from the holding frame for tightening and fixing the neck portion of the cathode ray tube. A mounting device for a cathode ray tube, comprising: a fastening piece;