KR20020072864A - Tension mask assembly comprising vibration reduction means - Google Patents

Abstract

PURPOSE: A tension mask assembly is provided to eliminate the problem of residual image caused due to the contact between the wire and tension mask, while preventing thermal distortion of the wire contacting the tension mask. CONSTITUTION: A tension mask assembly(10) comprises a tension mask(11) including an aperture portion(12) having a plurality of electron beam passing holes, and a non-aperture portion(13) extended from an edge of the aperture portion; a frame(14) including a plurality of support members(15) arranged to be spaced from each other at the lower portion of the tension mask, and a plurality of elastic members(16) each of which has both ends coupled to the support members so as to elastically support the support members; and a vibration damper including auxiliary members(19) arranged at the tension mask and formed of one or more thin films, and a damper coupled to the auxiliary members. The auxiliary member is formed by bending downward from the edge of the shorter side of the non-aperture portion of the tension mask. The damper includes a wire(18) installed to the support member or the elastic member, and which has a predetermined tension force.

Description

Tension mask assembly comprising vibration reduction means

The present invention relates to a tension mask assembly, and more particularly, to a tension mask assembly including an auxiliary body formed in the tension mask and a vibration damping means whose structure is improved to damp vibrations by coupling a damper.

In general, in the color cathode ray tube, an electron beam emitted from an electron gun is selectively deflected by a deflection yoke, and passes through an electron beam through hole of a shadow mask having a color selection function, thereby landing on the fluorescent film to form an image by exciting the fluorescent film.

The screen surface of the conventional color cathode ray tube which forms the image as described above is designed to have a predetermined curvature in consideration of the deflection trajectory of the electron beam when the electron beam emitted from the electron gun is deflected by the deflection yoke, and thus the shadow mask is also screened. It is designed to have a curvature corresponding to the curvature of the surface. In the conventional cathode ray tube, a shadow mask is heated by the electron beam emitted from the electron gun, that is, the hot electrons, and a domming phenomenon that swells to the panel side occurs. This domming phenomenon causes the electron beam to not land correctly on the fluorescent film. Further, since the screen surface is formed to have a predetermined curvature, the viewing angle is narrowed and the image is distorted at the edge of the screen surface.

In order to solve the problems described above, a planar cathode ray tube having a flat screen surface has been developed. The planar cathode ray tube forms a flat panel formed with a fluorescent film, and the tension mask is framed under tension. Is fixed to. Since the tension mask is mounted on the frame in the tensioned state, the thermal expansion amount is absorbed. In addition, the amount of thermal expansion of the tension mask is relatively large so as not to be absorbed as the frame is thermally expanded.

However, when a predetermined tensile force is applied to the tension mask, a howling phenomenon in which the tension mask is shaken by vibration of the speaker or the like during the operation of the CRT occurs for a predetermined time. This howling phenomenon prevents the electron beam emitted from the electron gun from landing correctly on the fluorescent film at a desired position, resulting in deterioration of image quality.

In order to solve such a problem, conventionally, the wire is in contact with the tension mask, and its end is fixed to an elastic member installed opposite to the lower end of the supporting member supporting the tension mask, thereby minimizing howling.

However, the above method has the following problems.

First, after the wire is in contact with the tension mask, residuals caused by the wire may appear on the screen. In order to prevent this, a method may be used in which the wire is positioned on the non-effective surface between the through holes on the tension mask. However, a wire having a diameter smaller than the width of the non-effective surface should be used, and it must be accurately positioned on the non-effective surface. There is a restriction.

Second, there is a possibility that the tension mask is heated by the electron beam emitted from the electron gun, and the wire in contact with the tension mask may cause thermal deformation, and thus may not effectively function as a damper.

The present invention has been made to solve the above problems, and includes a vibration damping means having an improved structure to form an auxiliary body on the tension mask, and to install a damper on the frame or coupled to the auxiliary body to attenuate vibration, or to the auxiliary body itself. The purpose is to provide a tension mask assembly.

Figure 1 is an exploded perspective view showing a tension mask assembly is installed vibration damping means according to an embodiment of the present invention,

FIG. 2A is a partial perspective view of the first embodiment in which the auxiliary body and the wire contact each other in FIG. 1;

FIG. 2B is a partial perspective view of the second embodiment in which the auxiliary body and the wire contact with each other in FIG. 1;

Figure 3 is an exploded perspective view showing a tension mask assembly is installed vibration damping means according to another embodiment of the present invention,

FIG. 4A is a partial perspective view of the first embodiment of FIG. 3 in which a ring is suspended in an auxiliary body;

4B is a partial perspective view of the second embodiment in which the ring is suspended in the auxiliary body in FIG. 3.

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

12..Study 13.Study

15. Support member 16. Elastic member

18..wire 19,21,31,41

32.Ring

In order to achieve the above object, a tension mask assembly including a vibration damping means according to the present invention includes a tension mask including a hole formed with a plurality of electron beam passing holes, and a hole extending from an edge of the hole; A frame comprising a plurality of support members installed at a lower distance from the tension mask, and a plurality of elastic members coupled to both ends of the support member to elastically support the support members; And vibration damping means having at least one thin plate auxiliary body formed on the tension mask, and a damper coupled to the auxiliary body. Characterized in that it has been included.

In addition, the auxiliary body of the vibration damping means is bent downward from the edge of the short side of the non-perforated portion, the damper is characterized in that made of a wire provided with a predetermined tensile force is installed on the support member or elastic member.

In addition, the damper is characterized in that it is made of a ring suspended on at least one auxiliary body to frictionally damp the vibration of the auxiliary body.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Tension mask assembly 10 according to an embodiment of the present invention, as shown in Figure 1, the tension mask 11, the frame 14 is installed in the lower portion of the tension mask 11 and fixed thereto; And vibration damping means provided at predetermined portions of the tension mask 11 and the frame 14.

The tension mask 11 includes a hole 12 having a plurality of electron beam through holes formed therein, and a hole 13 extending from an edge of the hole 12.

The frame 14 is installed side by side in the direction of both long sides of the tension mask 11, the support member 15 is fixed to the air hole 13, and the lower end of each of the support member 15 It is provided with an elastic member 16 which is fixed at an end and is installed at a position opposite to each other to elastically support the support member.

According to a feature of the present invention, the vibration damping means is installed in the at least one auxiliary body 19 formed in the tension mask 11, the elastic member 16 is coupled to the auxiliary body 19 to act as a damper. The wire 18 is included.

In more detail as follows.

The tension mask 11 is formed with an auxiliary body 19 that is bent downward from the short side portion of the holeless portion 13. The auxiliary body 19 is composed of one or more thin plates extending along both short sides of the no-hole 13. In addition, the auxiliary body 19 may be attached to the airless part 13 by welding or the like, or manufactured integrally when the tension mask 11 is manufactured, and the shape thereof may also vary.

On the other hand, both ends of the wire 18 are fixed between opposite ends of the elastic member 16. The wire 18 is fixed by applying a tensile force above a predetermined value. In addition, both ends of the wire 18 may be respectively fixed between the ends of the support member 15 facing each other.

FIG. 2A is a first embodiment showing the state of coupling between the auxiliary body 19 and the wire 18 in FIG. 1.

Referring to the drawings, the auxiliary body 19 is bent downward from the non-wetting portion 13 of the tension mask 11 (see FIG. 1) as described above.

The auxiliary body 19 consists of a body portion 19a and a splitting portion 19b. The splitting portion 19b is formed at two ends in the longitudinal direction at the end of the body portion 19, one branch is bent forward and the other branch is formed backward. The wire 18 fixed to the elastic member 16 (refer to FIG. 1) may be contacted in the space of the splitting portion 19b when the tension mask 11 is assembled later.

In addition, the splitting portion 19b may be divided into two or more branches so that the wire 18 may be contacted between the splitting portions 19b.

FIG. 2B is a second embodiment showing the state of coupling between the auxiliary body 21 and the wire 18 in FIG. 1.

Referring to the drawings, the auxiliary body 21 is bent downward from the non-perforated part 13, and the auxiliary body 21 includes a flat part 21a and a bent part 21b.

The bent portion 21b is formed by bending at a predetermined curvature from the end of the flat portion 21. In the space formed inside the bent portion 21b, a wire 18 fixed to the elastic member 16 may be contacted when the tension mask 11 is assembled later.

Accordingly, when a small vibration is generated by external impact or sound waves and transmitted to the tension mask 11, the wire 18 to which the tensile force is applied comes into contact with the auxiliary body 21 formed on the tension mask 11. Friction damping.

3 illustrates a tension mask assembly 30 according to another embodiment of the present invention.

In the tension mask assembly 30, since the tension mask 11 and the frame 14 have been described above in FIG. 1, only the features of the vibration damping means will be described in detail below.

Referring to the drawings, the vibration damping means according to the present invention includes a ring 32 which acts as a damper with at least one auxiliary body 31 which is bent downward from the non-perforated part 13 of the tension mask 11.

FIG. 4A is a first embodiment showing the state in which the ring 32 is suspended in the auxiliary body 31 in FIG. 3.

Referring to the drawings, the auxiliary body 31 is provided with a first coupling hole 31a on the upper surface of the auxiliary body 31 and a second coupling hole 31b on the lower surface of the auxiliary body 31. .

On the other hand, one end of the ring 32 is fitted into the first coupling hole 31a, and the other end of the ring 32 is fitted into the second coupling hole 31b.

Only one end of the ring 32 in the auxiliary body 31 may be fitted into the first coupling hole 31 or the second coupling hole 31b. Also, a plurality of rings 32 may be fitted in the above manner.

FIG. 4B is a second embodiment showing the state in which the ring 32 is fitted to the auxiliary body 41 in FIG. 3.

Referring to the drawings, there is a first auxiliary body 41a and a second auxiliary body 41b formed to be spaced apart from each other. A first coupling hole 42 is formed in the first auxiliary body 41a, and a second coupling hole 43 is formed in the second auxiliary body 41b.

One end of the ring 32 is fitted into the first coupling hole 42 formed in the first auxiliary body 41a, and the ring 32 is inserted into the second coupling hole 43 formed in the second auxiliary 41b. The other end of) is fitted.

The ring 32 may not only be coupled between the assistants 41 adjacent to each other, but may also be fitted between the assistants 41 which are not adjacent to each other.

Accordingly, when a fine vibration is generated by external impact or sound waves and transmitted to the tension mask 11, the ring 32 suspended in the auxiliary body 41 attenuates the vibration.

In addition, the ring 32 may be one of various shapes. In addition, the ring 32 is preferably a material having an elastic force capable of absorbing and damping vibration.

The tension mask assembly according to the present invention forms an auxiliary body in the tension mask and couples the auxiliary body and the damper, so that the phenomenon caused by contact of the wire with the tension mask, that is, the problem caused by the residual by the wire and the tension mask due to the hot electrons Due to the heating of the wire to increase the effect of reducing the aftershock while preventing the phenomenon such as not effectively performing the damper role.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and those skilled in the art may understand that various modifications and equivalent other embodiments are possible therefrom. will be. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (7)

A tension mask comprising a hole formed with a plurality of electron beam through holes, and a holeless portion extending from an edge of the hole; A frame comprising a plurality of support members installed at a lower distance from the tension mask, and a plurality of elastic members coupled to both ends of the support member to elastically support the support members; And Vibration damping means having at least one sheet-like auxiliary body formed in the tension mask and a damper coupled to the auxiliary body; Tension mask assembly comprising a. The method of claim 1, The auxiliary body of the vibration damping means is bent downward from the edge of the short side of the non-perforated portion, the damper is installed on the support member or elastic member, the tension mask assembly, characterized in that made of a wire to which a predetermined tensile force is applied. The method of claim 2, The assisting body is a tension mask assembly, characterized in that the split portion is formed so that the wire is in contact with the end. The method of claim 2, And the auxiliary body is formed of a curved portion having a curvature extending from an end thereof to wrap and contact the wire. The method of claim 1, The damper, the tension mask assembly, characterized in that the suspension is suspended in at least one or more of the auxiliary body made of a ring to frictionally damp the vibration of the auxiliary body. The method of claim 5, The ring is tension mask assembly, characterized in that fitted to each auxiliary body. The method according to claim 5, The ring has a tension mask assembly, characterized in that both ends thereof are fitted to the one auxiliary body and the other auxiliary body, respectively.