JP2001283748A - Cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that an image on a screen is deteriorated by a vibration of a press-contacted grid element assembly caused by a vibration of a damper spring itself generated by a strong external impact. SOLUTION: An aperture grill is provided with a grid thin plate, on which a slit is formed, and which has a tape-like grid element assembly that is longer than is wide; a damper spring for holding a damper wire which is tightly stretched so as to be press-contacted with the grid element assembly; and a frame for holding the grid thin plate and the damper spring. The damper spring 1 is provided with the damper wire 61 on one end, and the other end thereof is held by a linking and holding member 52d, wherein a wedge-like butting projection part 1c, which is butted against an edge part of a supporting surface 52g of the frame, is formed between both ends of the damper spring, thereby resonance of the damper spring itself is inhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cathode ray tube,
In particular, the present invention relates to a configuration of an aperture grill having a damper wire stretched between a pair of damper springs.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing a structure of an aperture grill 51 of a conventional cathode ray tube. In the figure, a frame 52 includes an upper support member 52a that receives and supports an upper long side portion 53a of a grid thin plate 53 having a number of vertical striped slits 53c, and a lower long side portion 53b of the grid thin plate 53 similarly.
And a lower support member 52b disposed at a position facing the upper support member 52a to receive and support the lower support member 52b. Further, the frame 52 tensions the upper and lower support members 52a and 52b at separated positions corresponding to the lengths of the left and right short sides of the grid thin plate 53, and places the grid thin plate 53 in the slit direction at a predetermined strength. In order to hold the support members 52a and 52b, a pair of substantially U-shaped coupling holding members 52c and 52d joined to respective ends of the support members 52a and 52b are provided.

The upper and lower support members 52a and 52b are formed such that their joint surfaces 52e and 52f
3a and the lower long side portion 53b are respectively joined and held. Each of the support members 52a and 52b has a pair of support holes 54a having a fitting hole 54a for mounting the aperture grill 51 to a locking pin (not shown) provided inside a glass housing constituting the cathode ray tube. Hardware 54 (only upper side is shown)
Are arranged.

The left and right connection holding members 52c and 52d each have a metal flat plate 62 fixed by metal welding on the rear surface thereof, and also have an aperture grill 51 and a locking pin provided inside a glass housing constituting a cathode ray tube. A pair of support fittings 55 (only the right side is shown) having a fitting hole 55c for attachment to (not shown) is provided. This support metal 55
It comprises a support base 55a fixed to the coupling and holding member 52c, and a support arm 55b extending from the support base and having a fitting hole 55c at the distal end.

Further, two pairs of damper springs 56, 57 and 58, 59 are arranged on the left and right coupling holding members 52c, 52d at a predetermined interval from each other, and a damper is provided between each pair of damper springs. Lines 60, 6
1 is stretched in a direction orthogonal to the slit 53c formed in the grid thin plate 53.

FIG. 7 is a top view of a main part of a member related to the mounting of the tamper spring 58, particularly showing a part indicated by the indication line b in the X direction, for showing a method of mounting each damper spring of FIG. In the figure, a damper spring 58
The fixing portion 58b at one end is fixed to the connection holding member 52d of the frame by welding or the like, and one end of the damper wire 61 is locked by a mounting portion 58a formed at the other end.

At this time, the damper wire 61 is stretched between a damper spring 59 (FIG. 6) similarly attached and a plurality of vertically long tape-like tapes alternately present adjacent to the slits 53c of the grid thin plate 53. Grid element 53d
7 (FIG. 7) to prevent these grid elements 53d from resonating due to vibration received from the outside.

Note that the mounting method shown in FIG.
It is assumed that each of the damper springs 56, 57, 58, 59 has a common mounting portion. However, the damper springs 56 and 58 disposed on the coupling holding member 52d have the same shape, but the damper springs 57 and 59 disposed on the coupling holding member 52c both divide the aperture grill 51 horizontally by two minutes. Spring 5 for the virtual plane g
7 is symmetrical.

[0009]

SUMMARY OF THE INVENTION Damper wires 60, 61
Can attenuate the vibration (resonance) phenomenon of the grid element 53d (FIG. 7) generated by an external shock or vibration.
When external vibrations matching the resonance frequencies of 7, 58 and 59 are applied, each damper spring itself vibrates, causing the grid element 53d pressed against to vibrate, thereby deteriorating the image on the screen. Was.

An object of the present invention is to provide a cathode ray tube in which each damper spring is suppressed from resonating with an applied external vibration and image quality deterioration such as color misregistration is reduced.

[0011]

SUMMARY OF THE INVENTION A rectangular grit thin plate having a grid element body with a slit formed therein, a frame holding a pair of long sides of the grit thin plate, and one end having a pair of short sides of the grit thin plate. A cathode ray tube comprising: a damper spring arranged in the vicinity of a side; and a damper wire stretched between the one ends of the pair of damper springs so as to be orthogonal to the grit element body and pressed against the grit element body. The other end of the damper spring is fixed to the frame, and a contact projection is provided for bringing at least one portion between both ends of the damper spring into contact with the frame. Further, the contact protrusion may be formed between both ends of the damper spring. Alternatively, the contact protrusion may be provided at a position corresponding to both ends of the damper spring of the frame.

A rectangular grit thin plate having a grid element body with a slit formed therein, a frame for holding a pair of long sides of the grit thin plate, and a frame fixed to the frame to form a frame for a cathode ray tube A support bracket located on a pair of short sides of the grit, a damper spring having one end disposed near a pair of short sides of the grit thin plate, and a pair of the brackets orthogonal to the grit body. A cathode ray tube having a damper wire stretched between the one ends of the damper spring and pressed against the grit element, wherein the other end of the damper spring is fixed to the support bracket, and both ends of the damper spring A contact projection is provided for contacting at least one portion between the support fittings. Further, the contact protrusion may be formed between both ends of the damper spring. Or,
The contact protrusion may be provided at a position corresponding to both ends of the damper spring of the support fitting.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to Embodiment 1 of the present invention. This damper spring 1 is, for example, shown in FIG.
A damper spring (not shown) having a shape symmetrical to the damper spring 1 and the virtual plane g is used in place of the damper springs 56 and 58 provided on the aperture grill 51 of FIG. FIG.
Used in place of the damper springs 57 and 59 of FIG. In the first embodiment, the damper spring 1 will be described as applied to the aperture grill shown in FIG. For this reason,
The same portions are denoted by the same reference numerals, and the description of the entire aperture grille will be omitted because it is redundant.

As described above, FIG. 7 is a top view of a main portion near the damper spring 58 in FIG. 6, and FIG. 1 also shows the same position, in which the damper spring 1 according to the present invention is disposed in place of the damper spring 58. It is a principal part top view which shows a state. In the figure, the damper spring 1 has a fixing portion 1b at the other end which is welded or the like to a connection holding member 52 of a frame.
d, a wedge-shaped contact projection 1 is formed by bending the contact portion from the fixed portion 1b toward the middle from the fixed portion 1b by a predetermined distance h1.
c is formed, and the contact protrusion 1c is
By contacting the end of the support surface 52g, the contact portion is supported by the coupling holding member 52d. Further, the damper spring 1 has one end of the damper wire 61 locked by a mounting portion 1a formed at one end.

At this time, the damper wire 61 is
2c (FIG. 6), a plurality of grid elements 53d in the form of a vertically long tape which are stretched between the other damper springs (not shown) arranged alternately adjacent to the slits 53c of the grid thin plate 53. (FIG. 1), and suppresses the grid element 53d from resonating due to vibration received from the outside.

The mounting method shown in FIG. 1 is common to the mounting portions of the other three damper springs (not shown) shown in FIG. However, as described above, the two damper springs disposed on the coupling holding member 52d have the same shape, but the two damper springs disposed on the coupling holding member 52c are both damper springs with respect to the virtual plane g. The one symmetrical to 1 is used.

As described above, according to the cathode ray tube of the first embodiment of the present invention, the contact protrusion 1
By providing c, the vibration amplitude of each damper spring generated when a large impact is applied from the outside can be limited, and the vibration energy of each damper spring is also absorbed, so that the vibration can be rapidly attenuated.
Further, the vibration form of the damper spring itself is changed so that resonance due to external vibration is less likely to occur, and it is possible to prevent the damper from swinging over the entire screen.

Embodiment 2 FIG. FIG. 2 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to a second embodiment of the present invention. The contact protrusion 2 shown here is formed, for example, on a mounting portion of each of the coupling holding members 52c and 52d of the aperture grille 51 shown in FIG. Therefore, also in the second embodiment, the contact protruding portion 2 is
The following description will be made assuming that it is added to the connection holding members 52c and 52d. Therefore, the same portions are denoted by the same reference numerals, and the description of the entire aperture grille will be omitted because it is redundant.

As described above, FIG. 7 is a top view of a main part near the damper spring 58 of FIG. 6, and FIG. 2 also shows a state where the contact protrusion 2 according to the present invention is additionally provided at the same position. It is a principal part top view. In the configuration of FIG. 2, the difference from the configuration of FIG. 7 described above is that the contact protrusion 2 is formed on the coupling holding member 52d, and the other configuration is the same as that of FIG. The description is omitted.

The contact protrusion 2 is formed at the end of the support surface 52g of the damper spring 58 of the coupling and holding member 52d, and contacts the contact portion at a predetermined distance h2 from the fixing portion 58b of the damper spring 58. Touch and support this part. The mounting method shown in FIG. 2 is common to the mounting portions of the other three damper springs (not shown).

As described above, according to the cathode ray tube of the second embodiment of the present invention, a large impact is applied from the outside since each of the damper springs 1 has the contact portion supported by the contact protrusion 2. The vibration amplitude of each side damper spring that occurs sometimes can be limited, and the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG. FIG. 5 is a perspective view showing a configuration of an aperture grill 10 of a cathode ray tube according to Embodiment 3 of the present invention. The aperture grill 51 shown in FIG.
The same reference numerals are given to the same parts as those described above, and the description thereof will be omitted. The holding members 52c and 52d of the aperture grill 10 have fitting holes 4c for attaching the aperture grill 10 to a locking pin (not shown) provided inside a glass housing constituting a cathode ray tube. A pair of support fittings 4 (only the right side is shown)
Are arranged.

The support fitting 4 comprises a support base 4a fixed to the connecting and holding member 52d and a support arm 4b extending from the support base and having a fitting hole 4c at the tip end. Is mounted with a damper spring 3 for stretching the damper wire 60. On the other hand, the damper wire 61 is, for example, the same as the first embodiment.
Is suspended by a damper spring 1 shown by.

FIG. 3 is a top view of a relevant part of a member related to the damper spring 3 shown in FIG. In the figure, the support base 4a is connected to the holding member 52 as described above.
d and holds a downwardly extending support arm 4b. The damper spring 3
A fixed portion 3b at the other end is fixed to the support arm 4b by welding or the like, and a wedge-shaped contact protrusion 3c is formed by bending at a contact portion at a predetermined distance h3 from the fixed portion 3b. The contact portion 3c is in contact with the widthwise end of the support arm 4b, so that the contact portion is supported by the support arm 4b. Further, the damper spring 3 locks one end of the damper wire 61 with a mounting portion 3a formed at one end.

On the other hand, the above-mentioned supporting member 4 and damper spring 3 and the supporting member and damper spring 7 which are symmetrically paired with a virtual plane g which divides the aperture grill 10 in the horizontal direction are provided on the coupling holding member 52d. Are arranged in a similar manner (FIG. 5 shows a damper spring 7).
Only the tip is shown). A damper wire 61 is stretched between these damper springs 3 and 7 and a grid thin plate 53 is provided.
And presses against a plurality of vertically tape-shaped grid elements 53d (FIG. 3) that are alternately provided adjacent to the slits 53c, and suppresses resonance of these grid elements 53d due to vibration received from the outside.

As described above, according to the cathode ray tube of the third embodiment of the present invention, since the damper spring 3 having the contact protrusion 3c (FIG. 3) is attached to the support fitting 4, the attachment is facilitated. Since the length h3 from the fixing portion 3b to the contact portion of the contact protrusion 3c can be set relatively long, the effect of suppressing the resonance phenomenon of the damper spring 3 itself due to external vibration is further enhanced.

Embodiment 4 FIG. 4 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to a fourth embodiment of the present invention. In the fourth embodiment, in the configuration of the third embodiment, the contact protrusion 3c of the contact portion provided on the damper spring 3 (FIG. 3).
Abuts on the support arm 5b of the support fitting 5 (FIG. 4).
Since the other configuration is exactly the same as that of the third embodiment, the description of the common parts is omitted.

The support fitting 5 of the fourth embodiment shown in FIG.
3 is different from the support fitting 4 of the third embodiment shown in FIG. 3 in that a contact protrusion 5c is formed. However, the configuration and mounting state of other parts are the same as those of the support fitting 4 of the third embodiment. Is the same. The contact protrusion 5c is formed at the end of the support arm 5b in the width direction at a position where it can contact the damper spring 6. On the other hand, the damper spring 6
A fixing portion 6b at the other end is fixed to the support arm 5b by welding or the like, and a damper wire 6 is attached to a mounting portion 6a formed at one end.
1 is locked at one end. The contact portion that is located at a middle distance from the fixed portion 6b by a predetermined distance h4 is pressed against and supported by the contact protrusion 3c formed on the support arm 5b.

As described above, according to the cathode ray tube of the fourth embodiment of the present invention, since each of the damper springs 6 has the contact portion supported by the contact protrusion 5c, a large impact is applied from the outside. The vibration amplitude of each side damper spring that occurs sometimes can be limited, and the same effect as that of the third embodiment can be obtained.

In the above-described embodiments, only one contact projection is provided. However, a plurality of contact projections may be provided so that the damper spring contacts a member holding the damper spring at a plurality of locations. Further, in the third and fourth embodiments, the damper spring is attached to each of the support arms 4b and 5b of the support fittings 4 and 5, respectively. However, the present invention is not limited to this. It is set and may take various forms, for example, it may be attached to the support bases 4a and 5a.

In the description of the above embodiment,
The terms "up,""down,""left,""right,""front," and "back" were used for convenience, and the absolute positional relationship in the state where the cathode ray tube is placed is described. It is not limited.

[0032]

According to the cathode ray tube of the first to third aspects of the present invention, by providing a contact projection on the damper spring or the frame, the vibration of each damper spring generated when a large impact is applied from the outside. The amplitude can be limited, the vibration energy of each damper spring is also absorbed, and the vibration can be rapidly attenuated. Further, the vibration form of the damper spring itself is changed so that resonance due to external vibration is less likely to occur, and it is possible to prevent the damper from swinging over the entire screen.

According to the cathode ray tube of the fourth to sixth aspects of the present invention, the damper spring is attached to the supporting member, and the contact projection is provided on the damper spring or the supporting member. Since the distance from the fixing portion to the contact protrusion can be set relatively long, the effect of suppressing the resonance phenomenon of the damper spring itself due to the external vibration is further enhanced.

[Brief description of the drawings]

FIG. 1 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to a first embodiment of the present invention.

FIG. 2 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to a second embodiment of the present invention.

FIG. 3 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to a third embodiment of the present invention.

FIG. 4 is a main part top view showing a shape and an attachment method of a damper spring of a cathode ray tube according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing a configuration of an aperture grill 10 of a cathode ray tube according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of an aperture grill 51 of a conventional cathode ray tube.

FIG. 7 is a top view of a main part of a member related to the mounting of the tamper spring 58, in particular, showing a portion indicated by an indication line b in the X direction in order to show a method of mounting each damper spring of FIG.

[Explanation of symbols]

1, 3, 6, 7 damper spring, 1a mounting portion, 1b fixing portion, 1c, 2, 3c, 5c contact protrusion, 3a mounting portion, 3b fixing portion, 4 support fittings,
4a support base, 4b support arm, 5 support fitting, 5a support base, 5b support arm, 10
Aperture grill, 51 Aperture grill, 5
2 frame, 52a, 52b support member, 52
c, 52d binding holding material, 52e joining surface, 52f
Joining surface, 53 grid thin plate, 53a upper long side, 53b lower long side, 53c slit, 53
d-grid body, 54, 55 support bracket, 55a
Support base, 55b support arm, 55c fitting hole,
56, 57, 58, 59 damper spring, 5
9a mounting part, 59b fixing part, 60, 61 damper wire, 62 metal flat plate.

Claims (6)

[Claims] 1. A rectangular grit thin plate having a grid body with a slit formed therein, a frame holding a pair of long sides of the grit thin plate, and one end disposed near a pair of short sides of the grit thin plate. A cathode ray tube having a damper spring and a damper wire stretched between the one ends of the pair of damper springs so as to be orthogonal to the grit body and pressed against the grit body. A cathode ray tube, wherein the other end is fixed to the frame, and a contact projection for contacting at least one portion between both ends of the damper spring with the frame is provided. 2. The cathode ray tube according to claim 1, wherein said contact projection is formed between both ends of said damper spring. 3. The cathode ray tube according to claim 1, wherein the contact protrusion is provided at a position corresponding to both ends of the damper spring of the frame. 4. A rectangular grit thin plate having a grid element body with a slit formed therein, a frame for holding a pair of long sides of the grit thin plate, and a frame fixed to the frame to connect the frame to a cathode ray tube. A support fitting located on a pair of short sides of the grit for mounting on the housing, a damper spring having one end disposed near the pair of short sides of the grit thin plate, and orthogonal to the grit element body. A cathode ray tube having a damper wire stretched between the one ends of the pair of damper springs and pressed against the grit element, wherein the other end of the damper spring is fixed to the support bracket, and both ends of the damper spring; A cathode ray tube provided with a contact projection for contacting at least one portion between the support brackets. 5. The cathode ray tube according to claim 4, wherein said contact projection is formed between both ends of said damper spring. 6. The cathode ray tube according to claim 4, wherein the contact protrusion is provided at a position corresponding to both ends of the damper spring of the support bracket.