JPH076691A - Shift device of damper wire for color sorting mask - Google Patents

Abstract

PURPOSE:To shift a damper wire surely further with reliability by providing an operating means for shifting the damper wire along an elastic member into contact with the damper wire, so as to eliminate trouble of dust sticking onto a color sorting mask. CONSTITUTION:A rotary cylinder 9 is actuated to turn a rotary plate 8 by a prescribed angle in a direction of arrow mark R. Thus, a shaft 6 is placed in a position completely separated from a damper wire 1. In this condition, a base 13 is lowered down along an arrow mark Y. Next by actuating a cylinder 15, a damper spring retainer 12 is protruded to the front to press a damper spring 5 loosened. Then by actuating the cylinder 9, the plate 8 is moved to turn in the clockwise direction. Thus, the shaft 6 is brought into contact relating to the wire 1, to shift it in a vertical direction of a picture plane. Here, the wire 1 is surely guided to a side of a groove 19 along an upper end part 21 of the spring 5 to advance into the groove 19. In order to place the wire 1 surely positioned into the groove 19, the plate 8 is impeded from its rotation in the clockwise direction by a stopper 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift device for shifting a damper wire for a color selection mask used in a cathode ray tube.

[0002]

2. Description of the Related Art A color selection mask or a color selection structure used for a Trinitron (registered trademark) type color cathode ray tube is called an aperture grill.

This aperture grill is composed of many grid elements. This grid element is also called a metal strip or a vertical stripe. Slits through which the electron beam passes are formed between the grid elements.

In this type of cathode ray tube, after forming a phosphor screen or a phosphor layer through a mask, an electron beam is irradiated when an image is taken. That is, with the color selection mask attached to the panel of the cathode ray tube, a phosphor layer is formed in the cathode ray tube and electron beam irradiation is performed.

The color selection mask is composed of a large number of grid elements as described above, and when the grid elements resonate due to external vibration with respect to these grid elements, a color is generated when an image is taken. A damper wire is stretched to prevent the image quality from deteriorating due to the displacement.

[0006]

Since the damper wire is stretched across the color selection mask as described above, it is possible to reduce the amount of light when the color selection mask is attached to the panel when creating the fluorescent screen. However, the shadow of the damper line, that is, the damper shadow, appears on the effective screen of the panel.

Therefore, the ultraviolet rays are blocked by the damper wire when the fluorescent screen is formed, and the portion of the phosphor layer corresponding to the damper wire is thinly formed. Moreover, when the electron beam is irradiated when a color image is actually displayed by the cathode ray tube, the electron beam is blocked by the damper line, and the brightness of the portion of the phosphor layer corresponding to the damper line is lowered.

As described above, as a measure for reducing the double inconvenience in the phosphor layer caused by the presence of the damper wire, the damper wire is moved back and forth before and after the formation of the phosphor layer ( For example, JP-A-61-24053
(See Japanese Patent Publication No. 1).

However, when the damper wire is moved before and after the phosphor screen is formed by this conventional method, compressed air is used as the moving method, and the compressed air is blown directly to the damper wire to form the damper wire. It was shifting from one position to another.

The noncontact damper wire shifting method using compressed air has the following problems. (1) Since the damper wire is not in contact with the damper wire, the shift of the damper wire is uncertain and the reliability is low. (2) When the compressed air is blown onto the damper wire, dust may be caught on the color selection mask and stick to it.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to shift the damper wire reliably and reliably without the risk of dust sticking to the color selection mask. An object of the present invention is to provide a damper wire shift device for a color selection mask.

[0012]

SUMMARY OF THE INVENTION In the present invention, the above object is to provide a damper wire stretched by an elastic member for preventing vibration of a color selection mask composed of a large number of grid elements in a cathode ray tube. A shift device for shifting, wherein the damper wire shift device for a color selection mask is provided with an operating means that contacts the damper wire and shifts the damper wire along the elastic member,
To be achieved.

In the present invention, it is preferable that the operating means has a shaft that comes into contact with the damper wire and rotates to shift the damper wire on the elastic member. Further, in the present invention, preferably, a groove for stopping the damper wire is formed at a predetermined position of the elastic member.

Further, in the present invention, preferably, there is provided a pressing means for pressing the elastic member to loosen the damper wire when the damper wire is shifted by the operating means.

Further, in the present invention, preferably, there is provided a moving means for moving the operating means in a direction orthogonal to a direction in which the elastic member is pushed by the pushing means. Further, in the present invention, preferably, there is provided a continuity confirmation means for confirming by conduction whether or not the damper wire is shifted on the elastic member.

[0016]

The operating means comes into contact with the damper wire and shifts the damper wire along the elastic member. At this time, preferably, the shaft of the operating means rotates by a predetermined angle to shift the damper wire from a predetermined position to another predetermined position.

When the damper wire is shifted, the damper wire is preferably loosened by the pressing means. Whether or not the damper wire is surely shifted can be confirmed, preferably by conducting electricity.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the examples described below are suitable specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

FIG. 1 shows a color cathode ray tube color selection structure,
Also, a damper wire stretched over the color selection structure is shown.

In FIG. 1, the color cathode ray tube is
It is a so-called Trinitron (registered trademark) type color cathode ray tube. The color selection structure includes a color selection blind mask (aperture grill) 2, a damper wire 1, a frame member 3, and a damper spring 5.

First, a color-selecting comb-shaped mask (hereinafter referred to as a color-selecting mask) 2 will be described. The color selection mask 2 has a large number of grid elements 2a. This grid element body 2a is also called a vertical stripe or a metal line shape. Slits 2b are formed between the grid elements 2a. The many grid elements 2a are frame-shaped support members 5
It is formed for 0.

The support member 50 is fixed to the frame member 3. On both sides of the frame member 3, damper springs 5 and 5 also called two elastic support pieces are fixed.
A damper wire 1 is stretched between the two damper springs 5 and 5 via a damper ribbon 4. The damper wire 1 is provided so as to extend in a direction perpendicular to the grid element body 2a.

The damper wire 1 is a damper wire for preventing vibration in order to prevent the grid element body 2a from resonating due to vibration from the outside and causing color shift when an image is displayed. As shown in FIGS. 1 and 2, the damper wire 1
One end and the other end of the damper ribbon 4
Is fixed through.

FIG. 2 is an enlarged view of the portion A of FIG. 1. The damper wire 1 is a fine wire made of, for example, a tungsten wire, and is seal-welded to the damper springs 5 and 5 via the metal ribbon 4. There is. The damper springs 5 and 5 are fixed to both sides of the frame member 3 by spot welding. The damper spring 5 and the frame member 3 are preferably made of a conductive material.

Next, please refer to FIG. 3 and FIG. FIG. 3 shows a state before the damper wire 1 is shifted, and FIG.
Shows the state after the damper wire 1 is shifted and fixed in the groove 19.

In FIGS. 3 and 4, a groove 19 is formed in the upper part of the damper spring 5. This groove 19
Is a groove for engaging and stopping the damper wire 1 after shifting and positioning. Next, with reference to FIGS. 5 and 6, a preferred embodiment of the damper line shifting device for a color selection mask of the present invention will be described.

In FIGS. 5 and 6, the shift device is
It has shift operating means 100, pressing means 80, and moving means 90.

First, the shift operating means 100 will be described. The shift operating means 100 is also called a rotating part. The shift operating means 100 includes a rotary cylinder 9 set for the base 13, an adjusting means 65, a rotary plate 8, a shaft mounting block 7, a shaft 6 and the like.

The rotary cylinder 9 is fixed to the base 13, and the rotary rod 9a of the rotary cylinder 9 can rotate about the rotation center C along the rotation direction R by a predetermined angle. There is. An intermediate portion of the rotary plate 8 is fixed to the lot 9a of the rotary cylinder 9. The shaft mounting block 7 is detachably screwed to one end of the turntable 8 with a screw 7a. The shaft mounting block 7 has a structure in which the longitudinal position of the rotary plate 8 can be adjusted.

At the tip of the shaft mounting block 7,
The shaft 6 is screwed together with the electric wire 18 having a round crimp terminal. The shaft 6 is a member for directly contacting the damper wire 1 and shifting the damper wire 1.

The position adjusting means 65 has a stopper 10 and a shift cylinder 11. The stopper 10 and the shift cylinder 11 are provided on a member 67 attached to the substrate 66.

The stopper 10 has a rotation direction R of the rotary plate 8.
To stop the rotation of. The shift cylinder 11 is a cylinder for rotating the rotary plate 8 by a slight rotation angle from the state where the rotary plate 8 is oriented in the arrow X direction as shown in FIG.

A conduction confirming means 30 for confirming conduction is provided between the shaft 6 or the electric wire 18 having a round crimp terminal and the frame member 3.

Next, the pressing means 80 will be described. The pressing means 80 includes a cylinder 15 for driving in the front-rear direction, that is, the arrow X direction, and a damper spring presser 12 that is moved back and forth in the arrow X direction by the front-rear cylinder 15.
It has a ball spline shaft 16. The damper spring retainer 12 is fixed to the rod 15a. The ball spline shaft 16 has a detent function for preventing the rod 15a and the damper spring retainer 12 from rotating with respect to the base 13.

By driving the front and rear cylinders 15 of the pressing means 80, the damper spring presser 12 can press the damper spring 5 toward the color selection mask 2 side to loosen the damper wire 1.

Next, the moving means 90 will be described. The moving means 90 has two guide shafts 17, 17 and a base 13, and an upper and lower cylinder 14. By operating the upper and lower cylinders 14, the base 13 can be moved up and down in the arrow Y direction. The arrow X
The direction and the arrow Y direction are orthogonal to each other.

Next, an operation example of the damper wire shift device shown in FIGS. 5 and 6 will be described. First, refer to FIG. The damper wire 1 is provided so as to extend on the color selection mask 2 at a right angle to the grid element body 2.

As shown in FIG. 7, when the rotary cylinder 9 operates, the rotary plate 8 rotates about the rotation center C in the direction of arrow R (counterclockwise direction) by a predetermined angle. As a result, the shaft 6 is completely separated from the damper wire 1. In this state, the base 13 is lowered along the arrow Y in FIG.

Next, the front and rear cylinders 15 are actuated, the damper spring retainer 12 is projected forward, and the damper spring 5 is pushed to be loosened. As a result, the damper wire 1 is loosened. In the states of FIGS. 7 and 8, the damper wire 1 is in a state before being shifted, as shown in FIG. That is, the damper wire 1 is not in the groove 19.

Next, the rotating cylinder 9 is operated to operate the rotating plate 8.
Rotate clockwise. As a result, as shown in FIG. 9, the shaft 6 comes into contact with the damper wire 1,
The shaft 6 shifts the damper wire 1 in the Z direction (vertical direction of the screen) of FIG.

At this time, the damper wire 1 is reliably guided to the groove 19 side along the upper end portion 21 of the damper spring 5 and enters the groove 19. That is, the damper wire 1 is not fitted in the groove 19 shown in FIG. 3 but is fitted in the groove 19 shown in FIG.

Further, in order to surely position the damper wire 1 in the groove 19, the stopper 10 blocks the rotation of the rotary plate 8 in the clockwise direction. By stopping the rotation of the rotary plate 8, the damper wire 1 is moved to the groove 1
It is possible to prevent it from exceeding 9.

Next, as shown in FIG. 10, the shift cylinder 11 is operated to project the rod 11a thereof, whereby the rotary plate 8 is again rotated counterclockwise by a slight angle.
At this time, if the damper wire 1 is securely inserted in the groove 19 of FIG. 4, the contact between the shaft 6 and the damper wire 1 is released. Therefore, even if the conduction confirmation means 30 shown in FIGS. 10 and 5 confirms the conduction between the shaft 6 or the electric wire 18 with the round crimp terminal and the frame member 3, no current flows.

However, if the damper wire 1 is not securely inserted in the groove 19, the contact between the damper wire 1 and the shaft 6 is maintained, and for this reason, the shaft 6 or the electric wire 18 with a round crimp terminal is connected. The electrical connection with the frame member 3 is confirmed. By confirming with the conduction confirming means 30 whether or not this current flows, it can be confirmed whether or not the damper wire 1 is surely inserted into the groove 19.

As shown in FIG. 4, the groove 19 of the damper wire 1
When the fitting is completed, the rotary cylinder 9 is operated to return to the initial state of FIG. 7. That is, the rotary plate 8 is rotated counterclockwise by a predetermined angle. Then, the upper and lower cylinders 14 are operated to raise the base 13 to complete all operations.

As described above, in the embodiment of the present invention, the damper wire 1 can be surely shifted at the time of producing the fluorescent screen at the time of manufacturing the cathode ray tube and at the time of actually transferring an image to the cathode ray tube. . For example, when creating a phosphor screen,
In the state shown in FIG. 7, the damper wire 1 is kept at a predetermined position, and when the electron beam is scanned when an image is taken, the damper wire 1 is slightly moved in the arrow Z direction as shown in FIG.

The present invention is not limited to the above embodiment. For example, the groove 19 shown in FIG. 3 and FIG.
The shape is not limited to this, and another shape can be adopted. Further, instead of the groove, another type can be adopted as long as it can stop the damper wire 1.

Further, in FIG. 5, the damper spring 5 and the pressing means 80 are not limited to the type using the front and rear cylinders 15, but other types of driving means may be used. Further, instead of using the rotary plate 8 in the shift means 100, it is also possible to employ a mechanism for moving the shaft 6 in parallel along the direction of the grid element body 2a of the mask 2, for example.

[0049]

As described above, according to the inventions of claims 1 to 5, there is no possibility that dust adheres to the color selection mask as in the conventional case, and the damper wire can be reliably fixed by contact. The position can be shifted to, and the shift operation can be performed reliably with high reliability. Moreover, this shift can be performed with equipment that can be easily added to conventional equipment. According to the invention of claim 5, the damper wire can be shifted more easily by loosening the damper wire. Further, according to the invention of claim 6, whether the damper wire is correctly shifted to an arbitrary position,
You can check whether or not there is continuity.

[Brief description of drawings]

FIG. 1 is a perspective view showing a damper wire and a color selecting structure that are shifted by a damper wire shifting device for a color selecting mask of the present invention.

FIG. 2 is an enlarged view of a portion A of FIG.

3 is a perspective view showing a state before the damper wire is shifted, further enlarging a portion A of FIG. 2. FIG.

FIG. 4 is a perspective view showing a state after the damper wire has been shifted, corresponding to FIG. 3;

FIG. 5 is a perspective view showing a preferred embodiment of a damper wire shifting device for a color selection mask of the present invention.

6 is a side view of the shift device shown in FIG.

FIG. 7 is a plan view showing an initial state of operation of the shift device.

FIG. 8 is a view showing a state where a damper spring is being pressed.

FIG. 9 is a plan view showing a state where the damper wire is shifted.

FIG. 10 is a diagram showing a state in which a continuity test is performed to confirm whether or not the damper wire is surely shifted.

[Explanation of symbols]

 1 damper wire 2 mask 3 frame member 4 damper ribbon 5 damper spring (elastic member) 6 shaft 7 shaft mounting block 9 rotating cylinder 10 stopper 11 shift cylinder 12 damper spring retainer 13 base 14 upper and lower cylinders 15 front and rear cylinders 17 guide shaft 18 round type Wire with crimp terminal 30 Continuity confirmation means 80 Pressing means 90 Moving means 100 Shift operating means (operating means)

Claims (6)

[Claims] 1. A shift device for shifting a damper wire stretched by an elastic member in order to prevent vibration of a color selection mask composed of a large number of grid elements in a cathode ray tube, the damper wire comprising: A damper wire shifting device for a color selection mask, characterized in that it is provided with an operating means for contacting with the elastic member to shift the damper wire along the elastic member. 2. The damper wire for a color selection mask according to claim 1, wherein the operating means has a shaft that comes into contact with the damper wire and rotates to shift the damper wire on the elastic member. Shift device. 3. The damper wire shifting device for a color selection mask according to claim 1, wherein a groove for stopping the damper wire is formed at a predetermined position of the elastic member. 4. The damper wire for a color selection mask according to claim 1, further comprising a pressing means for pressing the elastic member to loosen the damper wire when the damper wire is shifted by the operating means. Shift device. 5. The damper wire shifting device for a color selection mask according to claim 4, further comprising a moving unit that moves the operating unit in a direction orthogonal to a direction in which the elastic member is pressed by the pressing unit. 6. The damper wire for a color selection mask according to claim 1, further comprising a continuity confirmation means for confirming by conduction whether or not the damper wire is shifted on the elastic member. Shift device.