CN1298010C

CN1298010C - Shadow mask spring and producing method thereof

Info

Publication number: CN1298010C
Application number: CNB031575129A
Authority: CN
Inventors: 崔仁福
Original assignee: Ohsung Electronics Co Ltd
Current assignee: Ohsung Electronics Co Ltd
Priority date: 2003-03-05
Filing date: 2003-09-23
Publication date: 2007-01-31
Anticipated expiration: 2023-09-23
Also published as: KR20040078756A; KR100482176B1; CN1527347A

Abstract

A mask spring and a method for manufacturing the mask spring are provided to reduce a manufacturing cost by avoiding scrap of material during mask spring forming process. A method for manufacturing a mask spring comprises a step of performing a piercing process for burring coupling holes(23), a step of removing a joint portion of two mask springs, a step of bending a stud pin coupling portion(22), a step of burring the coupling holes, a step of removing outside materials of two mask springs, and a step of cutting two mask springs from the materials.

Description

Shadow mask spring and manufacture method thereof

Technical field

The present invention relates to a kind of shadow mask spring and manufacture method thereof, particularly relate to a kind of can making and produce the minimal waste that produces in the shadow mask spring process, thus the shadow mask spring and the manufacture method thereof that reduce production costs.

Background technology

Fig. 1 is the color cathode ray tube structural representation of prior art.As shown in Figure 1, this color cathode ray tube is by preceding glass screen 1 and before being welded on the glass screen 1, and forms with the back glass awl 2 that preceding glass screen 1 constitutes vacuum tube.The inner surface of glass screen 1 before phosphor screen 4 is positioned at, electron gun 13 then is arranged on the glass at phosphor screen 4 back sides and bores 2 neck places.For having the color selection function, and keep the shadow mask 7 of specific distance between phosphor screen 4 and the electron gun 13 with phosphor screen 4.Shadow mask 7 is welded on the shadow mask frame 3.In addition, shadow mask frame 3 is connected on the shadow mask spring 8, on the stud pin 12 that forms on the glass screen 1 before shadow mask spring 8 then is connected.Shadow mask frame 3 is welded on the internal shield of being made by magnetic material 9, is subjected to the influence of external magnetic field to prevent electron beam 6, thereby can alleviate the influence in magnetic field behind the brown pipe.Reddish yellow blue beam 6 from electron gun 13 emissions can be pooled the focusing purity magnet 10 of any for being used to regulate in the neck of glass awl 2, and the deflecting coil 5 that is used for reflection electronic bundle 6.At last, also be provided with one and be used to reinforce the bar hoop 11 that is subjected to the preceding glass screen that vacuum tube influences.The course of work of color cathode ray tube with said structure is as follows: electron gun 13 electrons emitted bundles 6 are reflected in level and vertical direction by deflecting coil 5, the electron beam 6 of level or vertical direction reflection is then by the light beam through hole on the shadow mask 7, impinge upon at last on the phosphor screen 4 of front end, thereby demonstrate desirable coloured image.Part electron beam 6 does not pass through the light beam through hole on the shadow mask 7, but shines the inner surface of shadow mask 7.As a result, the temperature of shadow mask 7 raises under the energy affect that irradiating electron beam produces.Along with the rising of shadow mask 7 temperature, thermal expansion occurs, and shadow mask 7 and the light beam through hole on it can produce thermal walking, and the track that therefore reaches fluoroscopic electron beam 6 will change.As a result, mistake appears in the landing of electron beam, and the purity of brown pipe reduces.Want to revise the electron beam landing mistake that is caused by thermal walking, present many manufacturers are all using shadow mask spring 8.This is because when the heat (for example heat energy) of shadow mask 7 when passing to shadow mask spring 8, shadow mask spring 8 can produce thermal walking along the rightabout of shadow mask 7 thermal walking directions, and the electron beam that is caused by thermal expansion shadow mask 7 with balance lands wrong and helps electron beam 6 to converge to the suitable position of phosphor screen.Fig. 2 is a shadow mask spring structure schematic diagram related to the present invention.As shown in Figure 2, glass shields the last stud pin 12 that forms of 1 sidewall 1a and can be inserted in the connecting hole 23 that forms on the stud pin connecting portion 22 of shadow mask spring 8, and weld part 21 then is welded on the shadow mask frame 3.In addition, operating portion 20 is the angle tilt to be scheduled between shadow mask frame 3 and glass screen 1, and can make shadow mask frame 3 be fixed on the glass screen 1 and bootable shadow mask frame 3 move to the thermal walking side of shadow mask 7 in the opposite direction, thereby the landing mistake that thermal walking can be caused minimizes.Fig. 3 is the shadow mask method for manufacturing spring schematic diagram of prior art.Although a shadow mask spring is usually once made with a kind of raw material by factory, can make two shadow mask springs simultaneously by enough a kind of raw materials now.Fig. 3 illustrates the manufacture method of being made two shadow mask springs by row's raw material.The manufacture method of this shadow mask spring comprises the following steps: that (a) stamps out a connecting hole 23 on each shadow mask spring; (b) remove burr on the connecting hole 23; (c) remove skirt section between two shadow mask springs; (d) bending stud pin connecting portion 22; (e) raw material on the removing two shadow mask spring outer surfaces; (f) with predetermined angle bending operating portion 20; (g) cut two shadow mask springs down from raw material.Through after the above-mentioned steps, two staggered shadow mask springs that can obtain to make by a kind of raw material.As shown in Figure 3, on the outer surface of the skirt section of two shadow mask springs and shadow mask spring, can produce leftover pieces.In fact, the leftover pieces that produced account for 30% of total raw material greatly, will increase the cost of shadow mask spring like this.In addition, the raw material of shadow mask spring is very expensive.Therefore, a large amount of waste materials (being leftover pieces) that produce in Ang Gui shadow mask spring raw material and the shadow mask spring production process just become the principal element that the cathode ray tube cost raises.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind ofly can on such as the upper left limit of shadow mask spring raw material and limit, bottom right, the method with the raw material relative edge that is staggered make the leftover pieces that produce in the shadow mask spring production process reduce to minimum shadow mask spring and manufacture method thereof.

In order to achieve the above object, shadow mask method for manufacturing spring provided by the invention is with two shadow mask springs staggered making on the relative edge of raw material, does not produce leftover pieces between two shadow mask springs.

Shadow mask method for manufacturing spring provided by the invention is that no leftover pieces produce on the whole raw material with two shadow mask springs staggered making on the relative edge of raw material.

Shadow mask method for manufacturing spring provided by the invention comprises the following steps:

(a) on each shadow mask spring, stamp out a connecting hole;

(b) cut the stud pin connecting portion open;

(c) bending stud pin connecting portion;

(d) remove burr on the connecting hole;

(e) cut operating portion and weld part open;

(f) with predetermined angle bending operating portion;

(g) from following two the shadow mask springs of raw material cutting.

Shadow mask spring and the manufacture method thereof that is used for cathode ray tube provided by the invention is with two shadow mask springs staggered making on the relative edge of raw material, the part of at least one shadow mask spring contacts with another shadow mask spring, and do not produce leftover pieces between two shadow mask springs, so not only can make the amount of waste material that produces in the shadow mask spring production process reduce to minimum, and can reduce production costs significantly.

Description of drawings

Below in conjunction with the drawings and specific embodiments shadow mask spring of the present invention and manufacture method thereof are elaborated.Components identical is used identical symbol.

Fig. 1 is the color cathode ray tube structural representation of prior art.

Fig. 2 is a shadow mask spring structure schematic diagram related to the present invention.

Fig. 3 is the shadow mask method for manufacturing spring schematic diagram of prior art.

Fig. 4 is according to shadow mask spring of the present invention and manufacture method schematic diagram thereof.

Embodiment

As shown in Figure 4, two shadow mask springs that are used for cathode ray tube are once produced in the present invention suggestion, and two shadow mask springs are staggered and make between two shadow mask springs and do not produce too much leftover pieces the relative edge of raw material.More preferably, purpose of the present invention not only is to make between two staggered shadow mask springs and does not produce leftover pieces, and does not also produce leftover pieces on whole raw material.According to the present invention, still might produce the shadow mask spring identical, and not produce any leftover pieces with the prior art performance.In fact, owing to do not produce leftover pieces, thereby the quantity of waste material can be reduced to minimum and can reduce production costs greatly.Want to achieve the above object, two shadow mask springs to be produced should be staggered on the corresponding sides of raw material, and the part of at least one shadow mask spring contacts with another shadow mask spring.More preferably, every part of each spring all contacts with another in two shadow mask springs, separates each other then, can make the quantity of waste material reduce to minimum like this.That is, a shadow mask spring is to cut apart from another shadow mask spring.For providing the detailed content of relevant shadow mask method for manufacturing spring, this method comprises the following steps: that (a) stamps out a connecting hole 23 on each shadow mask spring; (b) cut stud pin connecting portion 22 open; (c) bending stud pin connecting portion 22; (d) remove burr on the connecting hole 23; (e) cut operating portion 20 and weld part 21 open; (f) with predetermined angle bending operating portion 20; (g) from following two the shadow mask springs of raw material cutting.Wherein: step (a) is the preliminary step of formation connecting hole 23, and two shadow mask springs are finished simultaneously.Step (b) also is the preceding preliminary step of bending stud pin connecting portion 22 ears (edge).In step (c), bend the ear (edge) of stud pin connecting portion 22 specially, like this, the shadow mask spring just can be easy to be connected on the cathode ray tube.In step (d), remove burr on the connecting hole 23 can be connected to mode on the stud pin.In step (e), the operating portion 20 and the weld part 21 of two interconnective shadow mask springs separated each other.In step (f), bend the operating portion 20 of each shadow mask spring.At last, in step (g), cut shadow mask spring down from raw material.In a word, be to make the quantity of waste material reduce to minimum according to shadow mask method for manufacturing spring of the present invention with the leftover pieces mode minimum or that eliminate fully that the manufacture method that makes prior art produces.In addition, this method is applicable to the shadow mask spring that uses two or more raw materials with different heat expansion speed to make.Another benefit of the present invention is that it can be with not producing the production cost that a kind of like this mode of raw material leftover pieces reduces the shadow mask spring in a large number.

Claims

1, a kind of shadow mask method for manufacturing spring that is used in the cathode ray tube is characterized in that: described shadow mask method for manufacturing spring is with two shadow mask springs staggered making on the relative edge of raw material, does not produce leftover pieces between two shadow mask springs.

2, a kind of shadow mask method for manufacturing spring that is used in the cathode ray tube is characterized in that: described shadow mask method for manufacturing spring is that no leftover pieces produce on the whole raw material with two shadow mask springs staggered making on the relative edge of raw material.

3, a kind of relative edge who is used in raw material goes up the staggered shadow mask method for manufacturing spring of making two shadow mask springs, and it is characterized in that: described shadow mask method for manufacturing spring comprises the following steps:

(a) on each shadow mask spring, stamp out a connecting hole (23);

(b) cut stud pin connecting portion (22) open;

(c) bending stud pin connecting portion (22);

(d) remove burr on the connecting hole (23);

(e) cut operating portion (20) and weld part (21) open;

(f) with predetermined angle bending operating portion (20);

(g) from following two the shadow mask springs of raw material cutting.