KR100747812B1 - Structures of side spring using mask frame elasticity - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side spring for cushioning an external shock between a shadow mask frame and a panel, in particular a color cathode ray tube. In the structure of the side spring coupled between the frame and the panel, the support portion welded to the frame, the coupling portion supported on the panel, the first buffer portion twisted to the support portion, between the support portion and the first buffer portion It characterized in that it comprises a side spring consisting of a second buffer portion in which two or more triangles facing each other are bent in one direction.

According to the present invention, the mask frame buffer side spring is configured to form a triangular pyramid pyramid shape in the buffer portion so that the shock absorbing effect against the horizontal impact, and the connecting portion of the pyramid shape in the twisted shape of the spring The overall balance is to more effectively distribute the impact from the outside, thereby improving its buffering capacity and preventing the deformation of the shadow mask from the external impact.

Description

Side spring structure for mask frame buffer {STRUCTURES OF SIDE SPRING USING MASK FRAME ELASTICITY}

1 is a partial cross-sectional view of a colored cathode ray tube.

2 is a view showing a state in which a side spring for mask frame buffer of a color cathode ray tube is mounted;

3 is a view showing a frame spring coupled to the frame between the conventional panel and the frame.

Figure 4 is a view showing a side spring structure for a conventional mask frame buffer.

Figure 5 (a) (b) (c) is a view for showing the operation principle of the dome by the side spring for buffering the conventional mask frame.

Figure 6 is a view showing the structure of the mask frame buffer side spring according to the present invention.

Figure 7 (a) (b) is a view showing the operating principle of the side spring according to the invention.

8 is a view showing another side spring structure in the present invention.

<Explanation of symbols for the main parts of the drawings>

1 ... panel 2 .... funnel

3 ... weaving 4 ... shadow mask                 

5 ... fluorescent surface 6 ... deflection yoke

6a, 21 ... Joint 6b, 22,23 ... Shock

6c, 24.Support 7 ... E-beam

8 ... mask frame 9,20 ... side spring

10 ... inner shield 11 ... magnet

22 ... first buffer part 23 ... second buffer part

In the present invention, in the color cathode ray tube, the side spring structure for cushioning the frame of the shadow mask, which is configured to disperse the external shock by changing the shape of the side spring that absorbs the shock transmitted from the external shock to the shadow mask, into a pyramid twist shape. It is about.

The operation principle of a general color cathode ray tube will be described with reference to FIG.

A phosphor surface 3 facing the inner surface of the panel 1 and emitting light, a shadow mask 4 for selecting colors to emit phosphors, and a mask for supporting the outer surface of the shadow mask 4 The frame 5, the side springs 6 for coupling the left, right, top and bottom surfaces of the mask frame 5 to the panel 1, and the mask frame 5 so as to be less affected by external geomagnetism during the operation of the cathode ray tube. Inner shield (7) coupled to the electron beam, an electron gun (8) for generating an electron beam (11) by the anode voltage applied to the cathode ray tube is built in the neck of the funnel (2), and the electron beam ( 11) a deflection yoke 9 for deflecting up, down, left, and right, and a magnet 10 of 2, 4, 6 poles that corrects the course of trajectory so that the electron beam 7 strikes the phosphor to prevent poor color purity. .

Briefly describing the operation of the color cathode ray tube, the electron gun 8 embedded in the neck of the funnel 2 generates an electron beam by an anode voltage applied to the cathode ray tube, and the electron beam 11 is a panel. The fluorescent surface formed on the inner surface of (1) is hit. At this time, the electron beam 11 is deflected up and down, left and right by the deflection yoke 9 to form a screen, and the 2, 4, 6-pole magnet 10 has the electron beam 11 precisely predetermined to prevent poor color purity. Modify the trajectory to hit the phosphor.

In this color cathode ray tube, as shown in FIGS. 2 and 3, the shadow mask 4 having the fine pores 4a formed thereon is welded to the frame 5 at its outer periphery and welded to the frame 5. Side springs 6 are positioned on the upper and lower sides and the left and right side portions to mitigate the shock transmitted from the panel 1.

To this end, the side spring 6 is welded to the frame 5 and one end of the coupling part 6a inserted into the coupling hole 6ab processed in the stud pin 1a formed on the inside of the panel 1, and the other end thereof. It is composed of a support portion 6c fixed and a buffer portion 6b formed to be integrally formed between the coupling portion 6a and the support portion 6c to cushion the shock transmitted to the shadow mask 4.

When the side spring 6 is subjected to an impact from the outside through a drop test or the like, the shock is transmitted to the coupling part 6a through the panel 1, and the shock absorbing part integrally formed at the coupling part 6a ( 6b). At this time, the shock absorbing portion 6b of the side spring 6 absorbs the shock by absorbing the external shock, and as the shock is absorbed, the external shock passes through the support 6c to the frame 5 and the shadow mask 4. The deformation of the shadow mask 4 does not occur so that it is not transmitted directly to the.

However, the conventional side spring 6 can act as a buffer to absorb the impact A applied in the vertical direction (-Z) of the body portion 12 of the side spring 6, as shown in FIG. However, the shocks B1 & B2 applied in the horizontal directions Y and -Y of the body portion 12 cannot be effectively absorbed.

In particular, in the color cathode ray tube, the impact B1 applied in the downward direction (Y) is more sensitive than the impact B2 applied in the downward direction (-Y) from the upper direction of the horizontal impact of the body portion 12. This impact is the main cause of failure in color cathode ray tubes.

Referring to FIG. 4, when the impact A in the vertical direction (-z) is applied, the impact A is transmitted to the shock absorbing portion 6b via the coupling portion 6a of the side spring 6. The shock absorbing portion 6b structurally absorbs the shock by the spring elasticity and reduces the shock transmitted to the shadow mask 4 through the support portion 6c and the frame 5.

However, when the impact B1 in the horizontal direction Y is applied, the shock B1 cannot be effectively absorbed due to the structure of the shock absorbing portion 6b. That is, the direction of the impact (B1) applied in the horizontal direction and the body portion 12 is horizontal, the shock is transmitted to the shadow mask (4) as the shock is not effectively absorbed in the buffer (6b) do.                         

Therefore, when the impact B1 is applied in the horizontal direction, the shadow mask 4 is easily damaged, whereby the pores 4a of the shadow mask 4 are damaged and the electron beam transmitted by the electron gun 8 ( 11) It was not properly delivered to the fluorescent surface, resulting in poor color purity, which caused a fatal breakdown of the color receiver.

In addition, the principle of the doming generated in the color cathode ray tube and the role and action of the structure connected to the side spring (6) will be described with reference to (a) (b) (c) of FIG.

In FIG. 5A, the shadow mask 4 is for thermal expansion, in which only about 20% of the electron beam emitted from the cathode reaches the fluorescent surface and the remaining 80% impinges on the shadow mask 4. The kinetic energy is converted into thermal energy by the collision. This thermal energy causes the shadow mask 4 to thermally expand and swell in the screen direction M1, and the electron beam 11 also moves to the center of the panel 1 by the movement of the shadow mask 4 (M2). Done.

5B illustrates thermal expansion of the frame, in which heat is transferred from the shadow mask 4 inflated in FIG. 5A to the frame 5 so that the frame 5 extends in the lengthwise direction M5. Will expand. As the frame M5 expands and pulls the swollen shadow mask 4 toward the screen periphery M3, the electron beam moved to the screen center by the shadow mask 4 of FIG. Move to).

FIG. 5C shows the action of the side springs 6, in the case of bimetal springs using different thermal expansion materials, when the heat transferred by the frame 5 is not balanced between the shadow mask thermal expansion and the frame thermal expansion. By using the thermal expansion difference of the material of the side spring to balance the compensation and reverse compensation serves to make the electron beam 11 to reach the phosphor again. However, in the case of the side spring 6 of a single material, it is not effective in color purity correction because the frame 5 cannot serve to compensate the frame 5 up and down by only expanding in the longitudinal direction.

The howling is a phenomenon in which the shadow mask vibrates due to the vibration from the speaker of the sash, and the electron beam passing through the inherent mask hole escapes the intrinsic phosphor and degrades the brightness. There must be a cushioning function of the side spring, which is a medium for improving and transmitting sound waves, but it is difficult to improve the current spring structure.

The present invention has been made to solve the above-mentioned conventional problems, and constitutes a triangular pyramid-shaped pyramid shape in the buffer portion so that the side frame for cushioning the mask frame can also cushion the horizontal impact, the pyramid shape Twist shape allows the entire balance of the spring to be balanced, effectively dispersing the impact from the outside, improving its buffering capacity, and preventing the deformation of the shadow mask from external impact. The purpose is to provide a side spring structure.

In order to achieve the above object, the mask buffer side spring structure according to the present invention, in the structure of the side spring coupled between the frame and the panel of the shadow mask of the color cathode ray tube,

A support portion welded to the frame, a coupling portion supported on the panel, a first buffer portion twisted at the support portion, and two or more triangles facing each other between the support portion and the first buffer portion are bent in one direction. It characterized in that it comprises a side spring consisting of a second buffer.

Preferably, the first buffer portion has a rectangular shape bent downward from the coupling portion, the second buffer portion is bent between the first buffer portion and the support portion three triangles forming one vertex is formed in a pyramid shape It is characterized by.

, 사각형과 이에 접하는 삼각형의 각도

, 상기 사각형과 이에 접하는 결합부 사이의 각도

가 각각 90도 보다는 크고 180보다는 작게 이루어지는 것을 특징으로 한다.Preferably, the buffer portion is an angle formed by two triangle vertices of three triangles

, The angle of the rectangle and its tangent

, The angle between the rectangle and the engaging portion

Are each larger than 90 degrees and smaller than 180.

Preferably, the angle formed by the triangular shape of the support portion of the side spring coupled to the frame and the buffer portion in contact with the frame is greater than 90 degrees, characterized in that made of less than 180.

 Hereinafter, with reference to the accompanying drawings as follows.

Figure 6 is a view showing the structure of the mask frame buffer side spring according to the present invention, Figure 7 (a) (b) is a view showing the operation principle of the side spring according to the invention, Figure 8 is another embodiment of the present invention The side spring structure is shown.                     

6 to 8, a coupling part 21 having a coupling hole 21a coupled to the stud pin 1a of the panel 1, a support part 24 welded to the mask frame 5, and The first shock absorbing portion 22 and the three triangles are formed between the coupling portion and the support portion and are formed of a single quadrangle, which is twisted between the coupling portion 21 and the support portion 24 so as to disperse the external impact and cushion the external impact. It is the structure which consists of the 2nd buffer part 23 which consists of pyramid shape.

Referring to the accompanying drawings, a side spring structure for a mask frame according to the present invention configured as described above is as follows.

First, the side spring 20 is one end of the coupling portion 21, the other end of the support portion 24, the plurality of buffer portions 22, 23 at the center of the bent integrally, the coupling portion 21 is inside The machined coupling hole 21a is fitted into the stud pin 1a of the panel 1, and the coupling part 21 is welded to the frame 5, which is the outer periphery of the shadow mask.

In addition, the plurality of shock absorbing portions 22 and 23 may include a first shock absorbing portion 22 and a second shock absorbing portion 23. The first shock absorbing portion 22 may have a single twisted shape. One side of one side is bent from the coupling portion 21 in the lower direction.

In addition, the third buffer portion 23 has three triangles forming one vertex, and one side of the first buffer portion 22 has a bottom side of one triangle 23a of the three triangles 23a, 23b, and 23c. It is bent upward and extended. In addition, the three triangles 23a, 23b, and 23c have two triangles 23a and 23b facing each other between the vertices and one triangle 23c is located between the opposite sides of the triangles. It is a structure having a half triangular pyramid with (P)

And, it is a structure bent at a predetermined inclination angle in the upward direction to the support portion 24 that is a quadrangle on the base of one triangle (23b) of the three triangles.

Since the second shock absorbing portion 23 of the side spring 20 has a vertex shape and is semi-triangular pyramid (pyramid) shape bent in one direction, when the impact B1 in the horizontal direction Y is applied, the center of the pyramid vertex is centered. It is applied to the shock absorbing force in the direction of impact up and down, and the first shock absorbing portion 22, which is a rectangular neck portion of the spring 20, absorbs the impact by the twist shape and affects the shadow mask. Significantly reduces impact

)라고 하고, 삼각형(23a)과 이에 접하는 트위스트 형상의 제 1완충부(22)와의 각도를 베타(

), 그리고 트위스트 사각형과 결합부(21)와 이루는 각도를 감마(

)라고 하였을 경우, 알파, 베타, 감마 각각은 90도 보다는 크고 180보다는 작게 한다(90°<

,

,

<180°).To this end, the buffers 22 and 23 use the alpha (an angle formed by the vertices of the two triangles 23a and 23b as shown in FIG. 8).

), And the angle between the triangle 23a and the twisted first shock-absorbing portion 22 in contact with the triangle 23a is beta (

), And the gamma angle between the twisted rectangle and the coupling part 21

), Each of alpha, beta, and gamma is greater than 90 degrees and less than 180 (90 ° <

,

,

<180 °).

In addition, the angle δ between the support part 24 of the side spring 20 coupled to the frame 5 and the pyramidal triangle 23b in contact with the frame 5 is made larger than 90 degrees and smaller than 180 (90 ° <δ). <180 °).

On the other hand, the side spring 20 is compensated for the large thermal expansion rate of the frame and compensated as shown in (b) of Figure 5, for this purpose, the material of the side spring 20 has two different thermal expansion rate Should be used. However, since such a material can be disadvantageously applied in the unit cost and environmental tests of the raw material, the side spring 20 of the present invention serves to compensate for the doming by changing the shape while using a single material.

As shown in (b) of FIG. 5, when the frame 1 expands in length and the distance to the panel 5 is closer, the pyramidal pyramids of the springs are extended as the distance is closer, and the frame is lifted up while the triangular pyramids are extended. And compensated doming to normal.

As described above, the shadow spring frame buffer side spring structure according to the present invention is designed to form a pyramid twist shape of the spring of the single material, the impact to reach the shadow mask by vibrating up and down, left, right, when the external impact It is effective in drop test by reducing the size, and the frame is corrected up and down by pyramid shape, so it is easy to correct color purity, and it is relatively advantageous in howling compared to other products.

Claims (5)

In the structure of the side spring coupled between the frame and the panel of the shadow mask of the color cathode ray tube, The support portion welded to the frame, the coupling portion supported by the panel, the first buffer portion twisted from the coupling portion, and two or more triangles facing each other between the support portion and the first buffer portion in one direction. Consists of a bent second buffer, The angle formed by the triangular shape of the support portion and the buffer portion in contact with the mask frame buffer side spring structure, characterized in that made larger than 90 degrees. The method of claim 1, The first buffer portion is formed in a rectangular shape bent downward from the coupling portion, the second buffer portion is bent between the first buffer portion and the support portion is characterized in that the three triangles forming one vertex in a pyramid shape Side spring structure for mask frame buffer. The method of claim 2, The buffer part is an angle formed by two triangle vertices of three triangles

, The angle of the rectangle and its tangent

, The angle between the rectangle and the engaging portion

Mask frame buffer side spring structure, characterized in that is made larger than 90 degrees and less than 180, respectively. delete In the structure of the side spring coupled between the frame and the panel of the shadow mask of the color cathode ray tube, A support part welded to the frame; A coupling part supported by the panel; A rectangular first buffer portion extending in a shape twisted downward from the coupling portion; And A second buffer portion in which a plurality of triangles facing each other are continuously bent in one direction between the support portion and the first buffer portion, One of the plurality of triangles is in contact with the first buffer portion mask frame buffer side spring structure.

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