JP2002042674A - Color selection mechanism for color cathode-ray tube, method of assembling the mechanism, and color cathode- ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color selection mechanism used in a color cathode-ray tube, a method of assembling the mechanism, and a color cathode-ray tube capable of preventing the quantity from being lowered by surely pressing the portion of a support member apart 1/3 thereof from a base end side so that irregularities so-called wrinkles are not produced on the surface of an aperture grille in assembly thereof even if an inexpensive press-worked support member is used. SOLUTION: This color selection mechanism for a color cathode-ray tube comprises a frame 2 having a pair of support members 13 and 23 of L-shaped in cross section and a pair of elastic members 4 for connectedly holding a pair of the support members 13 and 23 and an aperture grille 1 stretched by applying a specified tension between a pair of the support members 13 and 23 of the frame 2. The mechanism further comprises the pressed surfaces 14 and 24 formed at right angles to the pressing direction to allow a pressing body 7 for pressing a pair of the support members 13 and 23 in the direction of narrowing the distance of the members to come into contact therewith when stretching the aperture grille 1 are provided on the outer surfaces of a pair of the support member 13 and 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube widely used as a monitor device for various devices such as a television receiver and a computer display monitor, and more particularly, to color selection for a color cathode ray tube using an aperture grill. The present invention relates to a mechanism and an assembling method thereof.

[0002]

2. Description of the Related Art As a color selection mechanism of a color cathode ray tube, there is an apparatus using an aperture grill formed by forming a large number of stripe-shaped openings (slits) in a vertical scanning direction in a metal plate by selective etching. FIG. 3 is a perspective view showing the structure of a conventional color selection mechanism for a color cathode ray tube. In the drawing, reference numeral 1 denotes an aperture grille, and 2 denotes a rectangular frame for holding the aperture grille 1. Frame 2
Is a pair of horizontal support members 3 having an L-shaped cross section.
And a pair of support members 3 made of a hollow rectangular pipe material or the like.
And a pair of elastic members 4 connected and held in parallel at predetermined intervals by welding both ends of the pair of support members 3.

[0003] A damper spring 5 is welded to the pair of elastic members 4, and a damper wire 6 is stretched between the damper springs 5 so as to contact the surface of the aperture grill 1. It is configured to suppress vibration of the tape. The upper and lower ends of the aperture grill 1 are fixed by welding between a pair of support members 3, but are in a state called a flat aperture grill with a periphery at the time of welding, so that the periphery is cut after welding. It has become.

In the color selection mechanism having such a configuration, the aperture grill 1 caused by loud voice, vibration, impact, etc.
It is a big problem to suppress the deterioration of the image quality of the color cathode ray tube due to the vibration called so-called AG fluctuation. Therefore, the aperture grill 1 is stretched while a predetermined tension is applied between the pair of support members 3 or the like. A damper spring 5 is stretched over the surface of the aperture grill 1. FIGS. 4A, 4B, and 4C show a method of assembling the aperture grille 1 between the pair of support members 3 of the frame 2 as described above.

[0005] First, as shown in FIG.
The pair of support members 3 is pressed in the direction of the arrow by a pressing body 7 as shown in FIG. Note that the state before the pressing force is applied is indicated by a broken line, and the state after the pressing force is applied is indicated by a solid line.
Next, as shown in FIG. 4 (B), the aperture grill 1 is supplied between the pair of support members 3 which are narrowed to a predetermined interval by applying a pressing force, and both ends of the aperture grill 1 are kept in that state. The edge is fixed to the front end surface of the support member 3 by welding.

After the welding is completed, when the pressing force is removed as shown in FIG. 4C, a force for returning the pair of support members 3 to the original distance acts on the pair of support members 3 by the restoring force of the elastic member 4. The aperture grill 1 is tensioned by the restoring force, and is stretched under a predetermined tension. Here, when pressing the support member 3 from the side,
A pressurizer 8 having a columnar pressurizing member 7 as shown in FIG. 5B is used, but when the front end portion of the support member 3 is pressurized, a local portion as shown in FIG. The deformation 9 occurs, and the support member 3 is deformed so that the tip portion is depressed inward.

As a result, irregularities called wrinkles may occur on the surface of the fixed aperture grille 1 after the assembly of the color selection mechanism is completed, and these irregularities may cause many stripe-shaped slits of the aperture grille 1 to be formed. Becomes non-uniform, resulting in deterioration of image quality. Further, since the vibration of the aperture grill 1 is attenuated, the contact between the damper wire 6 stretched so as to contact the surface of the aperture grill 1 and the aperture grill 1 is obstructed, thereby deteriorating the quality of the color cathode ray tube. become.

Therefore, in order to prevent local deformation 9 when pressing the support member 3 at the time of assembling the color selection mechanism, the pressing position is changed from the base end to the distal end of the support member 3 as shown in FIG. Assuming that the width dimension to W is equal to W, it is necessary to press the one-third of the base end, which is divided into three equal parts, and not to press the part corresponding to two-thirds of the front end. Japanese Patent Application Laid-Open No. 9-7508 discloses a method in which the local deformation 9 is greatly suppressed, and the wrinkle occurrence rate can be reduced to 1% or less.
No. has been proposed.

However, recently, the structure of the support member 3 has been changed from a drawn product or a forged product having an irregular cross section as shown in FIG. It is shifting to a press-processed product using a flat plate material that can be produced at a time. In the case of a drawn product or a forged product, the L-shaped corner portion can be formed at a substantially right angle. However, when the support member 3 is pressed from a flat plate material, as shown in FIG. 3, a large bent portion 10 is formed at the outer base end of the L-shaped corner portion. The size of the bend R portion 10 is obtained by adding a thickness t to the bend R ₀ on the inner side of the base end due to restrictions due to press working.
₀ + t is the minimum value.

For this reason, when assembling the aperture grill 1 to the frame 2 using the support member 3 made of a pressed product, if the support member 3 is pressed as described above, the width W of the support member 3 is reduced. A portion corresponding to one third from the base end is applied to the bending R portion 10, and the pressing surface is inclined, so that the pressing force is dispersed and the pressing cannot be performed sufficiently. In addition, the dispersion of the pressing force causes a problem that the support member 3 is deformed by applying a force in an unintended direction to the support member 3, which causes the quality of the color cathode ray tube to deteriorate, and Since the contact surface of the pressurizing member 7 is the bent R portion 10 of the press working, the contact state is not stable, causing problems such as quality variation.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and the first problem is that even if a support member made of a press-processed product which can be produced at low cost is used. In order to prevent irregularities called wrinkles from being generated on the surface of the aperture grill during assembly, it is possible to reliably press and assemble one-third of the area from the base end of the support member, thereby preventing quality deterioration. An object of the present invention is to provide a color selection mechanism for a color cathode ray tube.

Another object of the present invention is to provide a color selection mechanism for a color cathode ray tube which can stabilize a contact state of a pressurizing member with a support member and suppress a variation in quality in assembling a color selection mechanism for a color cathode ray tube. Is to provide an assembling method. A further object of the present invention is to provide a color cathode ray tube capable of reducing cost and eliminating image quality deterioration due to wrinkles of an aperture grill caused by local deformation of a support member of a color selection mechanism.

[0013]

In order to solve the above problems, a color selection mechanism for a color cathode ray tube according to the present invention comprises a pair of support members having an L-shaped cross section and a pair of support members for connecting and holding the same pair of support members. A color selection mechanism for a color cathode ray tube, comprising: a frame made of an elastic member; and an aperture grill stretched by applying a predetermined tension between the pair of support members of the frame, wherein: On the outer side surface, when the aperture grill is stretched, a pair of supporting members are provided with a pressing surface perpendicular to a pressing direction for contacting a pressing body that presses in a direction to reduce the distance between the supporting members, By providing a pressing surface perpendicular to the pressing direction in which the pressing member is brought into contact with the outer side surface of the supporting member, the pressing member is brought into contact with the pressing surface regardless of the configuration of the supporting member of any configuration. Let me Since the pressing force can be applied in a constant pressing direction, the pressing force does not disperse, the supporting member can be pressed sufficiently and accurately without deformation, and the pressing force for suppressing wrinkling of the aperture grille can be reduced. Pressure conditions can be met.

The color selection mechanism for a color cathode ray tube according to the present invention is characterized in that, in the color selection mechanism for a color cathode ray tube described above, the support member is formed by pressing a flat plate material. A pressure surface is formed on the outer side surface of the member at right angles to the pressure direction in which the pressure member is brought into contact, so that the support member can be pressed sufficiently, accurately, and without deforming. As a press-processed product from a flat plate material that can be provided, it is possible to sufficiently reduce the quality deterioration and variation.

A color selection mechanism for a color cathode ray tube according to the present invention is characterized in that, in the above color selection mechanism for a color cathode ray tube, the pressing surface is provided on a base end side of the support member having an L-shaped cross section. By providing the pressing surface on the base end side of the support member, local deformation of the support member during pressurization can be prevented, and wrinkling of the aperture grill can be suppressed. The pressing surface is desirably provided at one third of the width of the support member on the base end side.

Furthermore, a color selection mechanism for a color cathode ray tube according to the present invention is characterized in that, in the color selection mechanism for a color cathode ray tube described above, the pressing surface is provided over the entire length in the length direction of the support member. By providing the pressing surface over the entire length in the length direction of the support member,
It is not necessary to specify the processing part, and the processing can be facilitated, and the allowable range of the range in which the pressing body is brought into contact at the time of pressing can be widened.

According to another aspect of the present invention, there is provided a method for assembling a color selection mechanism for a color cathode ray tube, comprising: a pair of support members having an L-shaped cross section; and a pair of elastic members for connecting and holding the same pair of support members. A method for assembling a color selection mechanism for a color cathode ray tube, comprising: a frame formed of a member; and an aperture grill stretched by applying a predetermined tension between the pair of support members of the frame. A direction in which a pressing body is brought into contact with a pressing surface perpendicular to a pressing direction provided on a base end side of the outer surfaces of the pair of supporting members, and the distance between the pair of supporting members is appropriately reduced by the pressing body. By pressing the edges of the aperture grille to the front end surfaces of the pair of support members while holding this state, and then releasing the pressurized state by the pressurizing body. Apa Yaguriru in those that characterized by being stretched between the pair of support members is provided with a pressing surface which forms a pressure direction perpendicular to the base end side of the outer surface of the support member,
Since the supporting member can be pressurized by bringing the pressing body into contact with the pressing surface, the contacting state of the pressing body is stabilized, and the supporting member is sufficiently and accurately deformed without dispersing the pressing force. Thus, the aperture grill can be welded and stretched while maintaining the pressure in a predetermined state, and the generation of wrinkles in the aperture grill can be suppressed, and variations in quality can be eliminated.

Further, in order to solve the above-mentioned problems, a color cathode ray tube according to the present invention is characterized by using the above-described color selection mechanism for a color cathode ray tube, and the above-mentioned color selection mechanism for a color cathode ray tube. By using
The quality of the color selection mechanism can be stabilized, image quality deterioration due to so-called AG fluctuation in the color cathode ray tube can be suppressed, and high quality image quality can be achieved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view (A) showing a support member of a color selection mechanism for a color cathode ray tube according to a first embodiment of the present invention and a sectional view taken along a line II of FIG. 1, and FIG. 2 is a second embodiment of the present invention. It is a perspective view which shows the support member of the color selection mechanism for color cathode ray tubes which concerns on a form.

In the drawing, reference numeral 13 denotes a pair of horizontal support members of a frame constituting a color selection mechanism of a color cathode ray tube. The pair of support members 13 and the hollow rectangular pipe as shown in FIG. And a pair of support members 1
A pair of elastic members 4 in the vertical direction for connecting and holding a pair of support members 13 in parallel at predetermined intervals by welding both ends to the frame 3 constitutes a rectangular frame-shaped frame 2. A color selection mechanism is constructed by extending the aperture grille 1 between the support members 13 of FIG. 1 by the assembling method shown in FIG. 4 and further extending the bumper wire 6 on the surface of the aperture grille 1 via the bumper spring 5. I am trying to do it.

The pair of support members 13 are formed by pressing a flat plate material, and have the same cross-sectional shape as that shown in FIG. 5 (B). However, as shown in FIG. 1B, the outer side surface and the inner side surface on the proximal end side have large bends R and R ₀ , respectively. When assembling and stretching the aperture grille 1 on the outer surface of the support member 13, the pressurizing member 7 that presses the pair of support members 13 in a direction to reduce the distance therebetween is brought into contact with the support member 13. Are provided at a plurality of locations along the length direction.

As shown in FIG. 1B, the pressing surface 14 is similar to the support member 1 shown in FIG.
Assuming that the width from the base end to the front end of W is equal to W, it is provided at one third of the base end side obtained by dividing it into three equal parts, and corresponds to two thirds at the front end side. Do not pressurize the site. Further, the pressing surface 14 is
Can be formed at the same time as the press working from a flat plate material, and the pressing surface 14 itself may be formed into either a concave surface or a convex surface (the concave surface in the illustration).

According to the above embodiment, since the pressing surface 14 for contacting the pressing member 7 is provided on the outer surface of the supporting member 13, the supporting member 13 pressed from a flat plate is used. Also, the pressing body 7 does not touch the bending R portion on the base end side, and by bringing the pressing body 7 into contact with the pressing surface 14, the pair of frames 2 forming the frame 2 at the time of assembling the color selection mechanism. The pressing force can be applied stably so as to narrow the interval to a predetermined interval without sufficiently deforming the supporting member 13 locally by pressing the supporting member 13 sufficiently and accurately.

Then, in this state, the aperture grill 1 is welded between the front end surfaces of the pair of support members 13 so that
The aperture grill 1 can be stretched between the pair of support members 13 by reliably applying a predetermined tension while suppressing the generation of irregularities called wrinkles on the surface of the aperture grill 1. Therefore, conventionally, when a support member pressed from a flat plate material was used, it was not possible to press a third portion from the base end side of the support member due to the presence of a large bending R portion. According to the embodiment, the aperture grill 1 can be used even when the pressed support member 13 is used.
The above-mentioned pressurizing condition for suppressing the occurrence of irregularities called wrinkles can be satisfied.

For this reason, it is possible to prevent the quality deterioration of the color cathode ray tube due to the unevenness of the stripe-shaped slits of the aperture grille 1 caused by the deformation of the support member 13 and the reduction of the vibration suppression effect by the damper wire, and the support member. 13 can be provided by an inexpensive pressed product, so that the cost can be reduced. Further, when assembling the color selection mechanism, when pressing the pair of support members 13, the pressing body 7 and the support members 13 are pressed.
Since the variation of the contact state with the color cathode ray tube can be suppressed, the quality of the color selection mechanism can be stabilized, the quality variation of the color cathode ray tube can be suppressed, and the image quality can be improved.

Further, since the pressing surface 14 is simultaneously processed at the time of pressing the support member 13, no additional step is required, and the advantage that the support member can be provided at low cost can be enjoyed as it is. . In addition, since the pressing surface 14 is provided only at a plurality of positions in contact with the pressing body 7, the pressing surface necessary to press the supporting member accurately and without deforming with minimum processing is required. Can be formed.

In the above-described first embodiment, an example has been described in which the pressing surface 14 is simultaneously processed when the supporting member 13 is pressed. However, the pressing surface 14 is formed after the supporting member 13 is pressed. Of course, it may be provided by a cutting process or the like in another step.

Similarly, in the above-described first embodiment, the pressing surface 14 is provided only at a portion that comes into contact with the pressing body 7, but as shown in FIG.
The pressurizing surface 24 may be provided over the entire length in the longitudinal direction. In this case, it is not necessary to specify a processing portion, and the processing can be facilitated. Can be widened. The pressurizing surface 24 may be provided by either simultaneous processing during press working or separate cutting.

[0029]

As described in detail above, according to the color selection mechanism for a color cathode ray tube according to the present invention, a pressed product which can be produced at low cost by a simple structure in which a pressing surface is provided on the outer surface of the support member. Even if a support member made of is used, one-third of the portion from the base end side of the support member is securely pressurized so that unevenness called wrinkles does not occur on the surface of the aperture grill during assembly. Therefore, quality deterioration of the color selection mechanism can be suppressed, and cost can be reduced.

According to the method of assembling the color selection mechanism for a color cathode ray tube according to the present invention, the contact state of the pressurizing member with the support member is stabilized, and the pressing force is not dispersed.
Since the aperture grill can be welded by pressing the support member stably, even if a pressed support member is used, the deformation of the support member can be suppressed and the color selection mechanism can be assembled, and the color selection mechanism can be assembled. Quality variation can be suppressed. Further, according to the color cathode ray tube according to the present invention, the use of the above-described color selection mechanism enables the cost to be reduced, and also prevents the image quality deterioration due to wrinkles of the aperture grill caused by local deformation of the support member of the color selection mechanism. And high quality image quality can be secured.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a support member of a color selection mechanism for a color cathode ray tube according to a first embodiment of the present invention, and FIG.
It is I sectional drawing (B).

FIG. 2 is a perspective view showing a support member of a color selection mechanism for a color cathode ray tube according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a conventional color selection mechanism for a color cathode ray tube.

FIG. 4 is a process chart showing a method of assembling a conventional color selection mechanism for a color cathode ray tube.

FIG. 5 is a perspective view (A) showing a local deformation due to pressurization of a support member when assembling a conventional color selection mechanism for a color cathode ray tube, and a configuration diagram (B) of a pressurizing body.

FIG. 6 is a sectional view showing a state in which a support member is pressed by a drawing process (A) and a press process (B) used in a conventional color selection mechanism for a color cathode ray tube.

[Explanation of symbols]

1 ... aperture grille, 2 ... frame, 4 ... elastic member,
7 ... Pressure body, 13,23 ... Support member, 14,24 ... Pressure surface

Claims (6)

[Claims] 1. A frame comprising a pair of support members having an L-shaped cross section and a pair of elastic members for connecting and holding the same pair of support members, and applying a predetermined tension between the pair of support members of the frame. A color selection mechanism for a color cathode-ray tube, comprising an aperture grille stretched over, wherein a pressure is applied to the outer surfaces of the pair of support members in a direction to reduce the distance between the pair of support members when the aperture grille is stretched. A color selecting mechanism for a color cathode ray tube, comprising a pressing surface perpendicular to a pressing direction in which a pressing body is brought into contact. 2. The color selection mechanism for a color cathode ray tube according to claim 1, wherein the support member is formed as a pressed product from a flat plate. 3. The device according to claim 1, wherein the pressing surface is provided on a base end side of the support member having an L-shaped cross section.
2. A color selection mechanism for a color cathode ray tube according to claim 1. 4. The apparatus according to claim 1, wherein the pressing surface is provided over the entire length of the support member in the length direction.
2. A color selection mechanism for a color cathode ray tube according to claim 1. 5. A frame comprising a pair of support members having an L-shaped cross section and a pair of elastic members for connecting and holding the same pair of support members, and applying a predetermined tension between the pair of support members of the frame. A method for assembling a color selection mechanism for a color cathode-ray tube, comprising an aperture grille stretched over, wherein a right angle is formed with a pressing direction provided on a base end side of an outer surface of the pair of support members of the frame. A pressing body is brought into contact with a pressing surface, and pressure is applied by the pressing body in a direction to appropriately reduce the interval between the pair of support members. While maintaining this state, the edge of the aperture grill is supported by the pair of support members. A color cathode ray, wherein the aperture grill is stretched between the pair of support members by welding and fixing to a front end surface of the member, and then releasing the pressurized state by the pressurizing body. Tube color selection How to assemble another mechanism. 6. A frame comprising a pair of support members having an L-shaped cross section and a pair of elastic members for connecting and holding the same pair of support members, and applying a predetermined tension between the pair of support members of the frame. Pressurizing direction, which comprises an aperture grille that is stretched and extended, and contacts a pressurizing body that presses the pair of support members in a direction to reduce the distance between the pair of support members when the aperture grille is stretched. A color cathode ray tube characterized by using a color selection mechanism for a color cathode ray tube provided with a pressurizing surface at right angles to the color cathode ray tube.