JPH0628976U - Electron beam adjuster - Google Patents

Abstract

(57) [Abstract] [Purpose] Two types of electron beam adjusting devices, lock ring type and non-lock ring type, can be manufactured with the same mold, and the same automatic assembly machine is used for both types when assembling them. It is an object of the present invention to provide an electron beam adjusting device that can be used. [Structure] An annular locking wall (11) having an elastic pressing piece (10) elastically deformed in the axial direction of the cylindrical holder (7) on the outer peripheral surface of the cylindrical holder (7), and a radial locking wall (11). An elastically deformable locking claw (9) is integrally formed with a predetermined gap, and the magnet group (M) is sandwiched between the annular locking wall (11) and the locking claw (9). In addition to the structure that can be mounted, the lock ring can be mounted on the side opposite to the magnet group (M) with the annular locking wall (11) interposed. When the lock ring (15) is mounted, the lock ring type electronic The beam adjusting device is characterized in that it becomes a non-lock ring type electron beam adjusting device when the lock ring (15) is removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electron beam adjusting device mounted on a neck portion of a cathode ray tube of a color picture tube and a CRT display picture tube.

[0002]

[Prior art]

 The three electron beams emitted from the in-line integrated electron gun sealed on the neck side of the cathode ray tube are designed to concentrate at one point of the fluorescent surface coated on the front surface of the cathode ray tube. In order to collide the beam with the front surface of the fluorescent surface, the deflection yoke deflects the electron beam so that the three electron beams collide with the corresponding fluorescent pair picture elements. However, in reality, three electron beams are not concentrated at one point on the fluorescent surface due to variations in the manufacturing of the electron gun and the deviation between the electron gun and the tube axis, and the fluorescent substances to which each electron beam corresponds. If the picture elements collapse and collide with each other, the convergence characteristics and the purity characteristics deteriorate. In order to correct these variations, a two-pole magnet for adjusting the purity, a four-pole magnet for adjusting the convergence and a six-pole magnet for adjusting the convergence are arranged in pairs of two to form an electron beam adjusting device. The displacement amount is corrected by mounting on the pipe neck portion.

This electron beam adjusting device is mounted on a cathode ray tube together with a deflection yoke, and then the deflection yoke and the electron beam adjusting device are precisely and accurately adjusted and then shipped from the factory. By the way, when a cathode ray tube adjusted by an electron beam adjustment device is installed in a color receiver at a designated place in Japan, there is almost no need to readjust it.Therefore, at the same time when it is installed in the color receiver, each ring magnet is installed. It is fixed with an adhesive. However, when a cathode ray tube adjusted by an electron beam adjustment device is installed in a color receiver in a non-designated area such as overseas, the influence of geomagnetism may be different and the convergence characteristics may deteriorate. In such a case, it becomes necessary to perform image correction by re-adjusting the 4-pole and 6-pole magnets for convergence adjustment of the electron beam adjusting device in a state of being incorporated in the receiver.

As described above, there are two types of electron beam adjusting devices, a type that does not require re-adjustment and a type that requires re-adjustment. The type that requires re-adjustment is a lock ring type electron beam adjuster. A non-lock ring type electron beam adjusting device is used for the type that does not require readjustment.

An example of the structure of a conventional lock ring type electron beam adjusting device is shown in, for example, FIGS. 8 (a) and 8 (b) and FIGS. 9 (a) and 9 (b). The lock ring type electron beam adjusting device is a plastic cylindrical shape having a threaded portion a formed on the outer periphery of one end and an annular locking wall b formed on the other end side as shown in FIGS. 9 (a) and 9 (b). In the holder c, as shown in FIGS. 8A and 8B, a pair of purity adjusting two-pole magnets 1, a spacer ring 4, a pair of convergence adjusting six-pole magnets 2, a spacer ring 5, a pair of The convergence adjustment four-pole magnet 3, the spacer ring 6 and the lock ring d are sequentially inserted, and then the lock ring d located at the end is engaged with the screw part a and turned to tighten and fix the magnet group m. In addition, the electron beam adjusting device thus assembled is attached to the neck portion of the cathode ray tube, and then the tightening band e is tightened to fix the cathode ray tube net. It is fixed to the hook part. This electron beam adjusting device is called a front lock ring type electron beam adjusting device because the lock ring d is attached in front of the magnet group m.

In addition, in the lock ring type electron beam adjusting device, a so-called lock ring is attached to the back of the magnet group as shown in FIGS. A rear lock ring type electron beam adjusting device also exists. After that, in the locking ring type electron beam adjusting device, as shown in FIGS. 11 (a) and 11 (b), a plurality of locking claws f, f, ... As shown in FIGS. 10 (a) and 10 (b), a cylindrical holder h having an annular locking wall b formed on the other end side and a threaded portion g formed inside the annular locking wall b is provided as shown in FIGS. , Lock ring i, Spacer ring 4, Purity adjustment 2-pole magnet 1, Spacer ring 5, Convergence adjustment 6-pole magnet 2, Spacer ring 6, Convergence adjustment 4-pole magnet Lock ring 3 A configuration in which one end side of the group m is positionally regulated by the locking claw f, and a lock ring i located at the other end side is engaged with the screw part g and rotated to clamp and fix these magnet groups There, in this way an electron beam adjusting device assembled after mounted on the cathode ray tube neck, is fixed by clamping bands e.

On the other hand, an example of the structure of a conventionally used non-lock ring type electron beam adjusting device is shown in FIGS. 12 (a), (b), 13 (a), (b) and 14 (a). , (B). That is, as shown in FIGS. 13 (a) and 13 (b), the non-lock ring type electron beam adjusting device has a plurality of locking claws f, f ... Then, as shown in FIG. 12, a pair of two-pole magnets 1 for purity adjustment, a pair of 6-pole magnets for convergence adjustment 2 and a pair of convergences are provided on the cylindrical holder j having the annular locking wall b formed on the other end side. The adjusting four-pole magnet 3 is sequentially inserted with a spring type spacer ring k as shown in FIGS. 14 (a) and 14 (b) interposed therebetween, and one end side of the magnet group m is It is configured such that it is brought into contact with the annular locking wall b and the position of the other end is regulated by the locking claw f. The electron beam adjusting device thus assembled is mounted on the neck portion of the cathode ray tube as in the lock ring type electron beam adjusting device and is fixed by the tightening band e.

[0008]

[Problems to be solved by the device]

 Thus, conventionally, different ones are used for the lock ring type electron beam adjusting device and the non-locking type electron beam adjusting device. In order to reduce costs by using common parts and to use a common automatic assembly machine, the lock ring type electron beam adjustment device and the non-lock ring type electron beam adjustment device must have the same basic configuration. For that purpose, if the lock ring is removed while using the electron beam adjusting device of the lock ring type, the electron beam adjusting device can be used as a non-lock ring type electron beam adjusting device. A configuration is desired. However, such a method of use has not been possible with the conventional lock ring type electron beam adjusting device described above.

For example, in the case of the front lock ring type electron beam adjusting device shown in FIG. 8, when the lock ring d attached to the front end side of the magnet group m is removed, as shown in FIG. As a result, it becomes impossible to hold the front end face of the, and each pole magnet tilts and its setting position changes, and the function as an electron beam adjusting device is no longer fulfilled. Further, also in the case of the rear lock ring type electron beam adjusting device shown in FIG. 10, when the lock ring i attached to the rear end side of the magnet group m is removed, as shown in FIG. As a result of not being able to hold the rear end face, as in the case described above, the magnets of each pole incline and the function as the electron beam adjusting device is lost.

As described above, the conventional lock ring type electron beam adjusting device cannot be used as a non-lock ring type electron beam adjusting device. Therefore, a non-lock ring type electron beam adjusting device is provided separately from the lock ring type electron beam adjusting device. This resulted in the need for a lock ring type electron beam adjustment device. Since the lock ring type electron beam adjusting device and the non-lock ring type electron beam adjusting device have different basic configurations, common parts cannot be shared.Therefore, different types of metal molds suitable for each type are used. In addition to requiring a mold, two types of automatic assembly machines, a lock ring type and a non-lock ring type, are also required for assembly, which raises the problem of increasing the investment amount. The present invention has been made in view of the present situation, and two types of electron beam adjusting devices, a lock ring type and a non-lock ring type, can be manufactured by the same mold, and both types can be assembled at the same time. The purpose is to provide an electron beam adjusting device that can use the same automatic assembly machine.

[0011]

[Means for Solving the Problems]

 As a result of diligent studies, the inventor of the present invention can use it as an electron beam adjusting device of the lock ring type when the lock ring is attached, and can use it as a non-lock ring type electron beam adjusting device when the lock ring is removed. I devised the structure. Such an electron beam adjusting apparatus includes an annular locking wall having an elastic pressing piece elastically deformable in the axial direction of the cylindrical body on the outer peripheral surface of the cylindrical body, and a member capable of elastically deforming in the radial direction of the cylindrical body. A cylindrical holder integrally formed with the pawl at a predetermined interval is formed, and a plurality of pairs of ring-shaped adjusting magnets, which are paired with two pieces, are attached to the cylindrical holder and attached. One end side of the magnet group is regulated by the locking claw, and the other end side is pressed by the elastic pressing piece of the annular locking wall to put the magnet group in a temporarily fixed state, and the annular locking wall is fixed. The feature is that the lock ring as a fastener can be tightened as needed at the mounting part of the lock ring provided on the opposite side of the magnet group.

[0012]

[Action]

 When such an electron beam adjusting device is used as a non-lock ring type electron beam adjusting device, the magnet group is mounted on the cylindrical holder, and both end faces of the magnet group are locked by the locking claw and the shaft of the cylindrical holder. After holding the magnet group temporarily by holding it with the annular locking wall that elastically deforms in the direction, adjust the electron beam adjusting device by mounting it on the neck part of the cathode ray tube and then connecting between the pole magnets. Apply the adhesive and fix. When the electron beam adjusting device is used as a lock ring type electron beam adjusting device, the adhesive is not applied to the magnet group which is mounted on the cylindrical holder and is temporarily fixed. The magnet group is fixed by mounting a lock ring on the outside of the annular locking wall and tightening it, and pressing the annular locking wall with the lock ring. Then, after incorporating the cathode ray tube incorporating the electron beam adjustment device into the collar, loosen the locking ring in the area where the color receiver is used, make the final adjustment as appropriate, and then tighten the lock ring again to fix the magnet group. Or further, each pole magnet is fixed with an adhesive. As described above, the electron beam adjusting device of the present invention can be used as a lock ring type electron beam adjusting device by attaching the lock ring, while it can be used as a non-lock ring type electron beam adjusting device by removing the lock ring. it can. Therefore, it is possible to realize the lock ring type electron beam adjusting device and the non-locking type electron beam adjusting device with common parts, and the same automatic assembling machine can be used for assembling.

[0013]

【Example】

 Next, the details of the present invention will be described based on the illustrated embodiment. 1 (a), (b) to FIG. 4 (a), (b) show a first embodiment of the electron beam adjusting apparatus of the present invention, and FIGS. 1 (a), (b) show a non-lock ring type. 2 (a) and (b) show a cylindrical holder, FIGS. 3 (a) and (b) show a lock ring, and FIGS. 4 (a) and (b) show a lock ring type. The state assembled in the form is shown. In each figure, (a) is a front view and (b) is a side view.

As shown in FIG. 2, the cylindrical holder 7 is elastically deformable in the radial direction of the cylindrical body 8 at one end outer peripheral surface of the cylindrical body 8 having an inner diameter that can be inserted into the neck portion of the cathode ray tube. A plurality of claws 9, 9 ... Are formed at intervals in the circumferential direction, while at the positions spaced from the locking claw 9 in the axial direction of the cylindrical body 8 by a predetermined distance, the axial direction of the cylindrical body 8 is The elastic locking pieces 10, 10 ... Which can be elastically deformed are formed at a predetermined interval to form an annular locking wall 11. Further, a plurality of leg pieces 12, 12 ... Which are elastically deformable inward in the radial direction are provided on the outer surface side of the annular locking wall 11 at intervals. The entire body of the cylindrical body 8, the locking claw 9 and the annular locking wall 11 are integrally formed by using plastics.

The locking claw 9 has a tapered surface on its end side so that the ring-shaped adjusting magnet and the spacer ring can be easily inserted. The elastic pressing piece 10 formed on the annular locking wall 11 has tapered surfaces 13 and 13 on both sides thereof to gradually change the wall thickness, and the tapered surfaces 13 and 13 of the thick wall portion are annularly locked. It is set so as to project from the other part of the wall 11, and when the tapered surface 13 is pressed from the outer surface side of the annular locking wall 11, the elastic pressing piece 10 is elastically deformed to the inner surface side. Has been done.

As shown in FIG. 1, such a cylindrical holder 7 has a pair of purity adjusting two-pole magnets 1 a, a spacer ring 4, a pair of convergence adjusting six-pole magnets 2 a, a spacer ring 5 and a pair of them. The convergence adjusting 4-pole magnet 3a is passed over the locking claw 9 which is elastically deformed inward in the radial direction, and is sequentially inserted into the gap between the annular locking wall 11 and the locking claw 9 in the cylindrical holder 7. Mounting. Each pole magnet in the illustrated example has a tooth portion 14 formed on the outer periphery and is configured to be capable of automatic adjustment by engaging the tooth portion 14 with a gear driven by a motor. The toothed portion 14 is not always necessary. The distance between the annular locking wall 11 and the locking claw 9 is set so as to substantially match the thickness of the magnet group M. Therefore, when the magnet group M is completely attached, the locking claw 9 is located in contact with the front end surface of the magnet group M, that is, the outer surface of the convergence adjusting quadrupole magnet 3a. The elastic pressing piece 10 of the annular locking wall 11 is in contact with the end surface, that is, the outer surface of the two-pole magnet 1a for adjusting the purity, and the magnet group M has the locking claw 9 and the elastic pressing piece of the annular locking wall 11. It is in a state of being sandwiched between 10 and.

In this state, since the magnet group M is pressed by the elastic pressing piece 10 of the annular locking wall 11, a ring-shaped magnet is not provided between each pole ring-shaped magnet and the spacer ring. Sufficient locking force is generated to prevent excessive rotational displacement. Therefore, if the tightening band e is attached to the leg 12 of the electron beam adjusting device in this state as shown in the figure, and the electron beam adjusting device is attached and fixed to the neck portion of the cathode ray tube, the electron beam adjusting device is non-locked. It can be used as a ring type electron beam adjusting device.

Further, in order to use the present electron beam adjusting apparatus as a lock ring type electron beam adjusting apparatus, the following is performed. That is, as shown in FIG. 4, the lock ring 15 having the shape shown in FIG. 3 is attached to the outer surface side of the annular locking wall 11 of the cylindrical holder 7 on which the magnet group M is attached, and the leg piece 12 is attached. The tightening band e is attached so that the lock ring 15 is interposed between the annular locking wall 11 and the tightening band e. In this state, the electron beam adjusting device is mounted at a predetermined position on the neck portion of the cathode ray tube, and by tightening the band e, the electron beam adjusting device is fixed on the neck portion of the cathode ray tube. By rotating, the elastic pressing piece 10 of the annular locking wall 11 is pressed from the outer surface, and the elastic pressing piece 10 is deformed, whereby the magnet group M is put into a pinched state.

As shown in FIGS. 3A and 3B, the lock ring 15 has an inclined groove 16 formed on the inner surface thereof, and the inclined groove 16 is formed on the annular locking wall 11 of the elastic pressing piece 10. When the lock ring 15 is rotated along the taper surface 13 while being pressed against the taper surface 13, the lock ring 15 can press the elastic pressing piece 10 toward the magnet group M side. .

By rotating and tightening the lock ring 15 in this way, the magnet group M is strongly pressed by the elastic pressing piece 10 to be completely fixed, and on the other hand, by rotating the lock ring 15 in the opposite direction to loosen the magnet group M. Since M can be readjusted, this electron beam adjusting device can be used as a lock ring type electron beam adjusting device. Then, the cathode ray tube incorporating the electron beam adjusting device was incorporated into the color image receiver, and after adjusting each pole magnet in the area where the color image receiver was used, the lock ring 15 was tightened to fix the magnet group M. Complete, or after tightening the lock ring 15, apply an adhesive to the magnet group M to make the fixing state of the magnet group M even more complete, and then install the color receiver in the factory. It is to be shipped.

FIGS. 5 (a), (b) to 7 (a), (b) show a second embodiment of the electron beam adjusting apparatus of the present invention, and FIGS. 6A and 6B show a cylindrical holder assembled in a lock ring type configuration, and FIGS. 7A and 7B show a assembled state in a lock ring type configuration. There is. In each figure, (a) is a front view and (b) is a side view. The above-described embodiment is a so-called rear lock ring type in which the lock ring is arranged at the rear of the magnet group with the annular locking wall sandwiched between them, but in the one shown in FIGS. 5 to 7, the lock ring is arranged at the front of the magnet group. It shows a front lock ring type arranged with an annular locking wall sandwiched therebetween.

As shown in FIG. 6, the electron beam adjusting apparatus of the present embodiment has a threaded portion 18 formed on one end side of a cylindrical body 17, and an elastic pressing piece 10 is formed inwardly adjacent to the threaded portion 18. The cylindrical holder 20 is formed by forming the annular locking wall 11 that forms the above-mentioned structure and forming the elastically deformable locking claw 19 between the leg pieces 12 extending to the other end side of the cylindrical body 17. As shown in FIG. 5, in this cylindrical holder 20, a four pole magnet for convergence adjustment 3a, a spacer ring 5, a pair of six pole magnets for convergence adjustment 2a, a spacer ring 4, and a pair of two pole magnets for purity adjustment. 1a is passed from the right side in the drawing onto the locking claw 19 and is sequentially mounted on the cylindrical holder 20, and the magnet group M is mounted in the gap between the annular locking wall 11 and the locking claw 19 in the cylindrical holder. Wear it. Then, the tightening band e is attached to the leg piece 12, and the electron beam adjusting device is attached and fixed to the neck portion of the cathode ray tube, so that the electron beam adjusting device is used as a non-lock ring type electron beam adjusting device. .

When the present electron beam adjusting device is used as a lock ring type electron beam adjusting device, a lock ring 21 having a threaded portion formed on the inner surface thereof is provided on one end side of the cylindrical holder 20 as shown in FIG. The threaded portion 18 is screwed and tightened. By tightening the lock ring 21, the elastic pressing piece 10 of the annular locking wall 11 is deformed and presses the front end surface of the magnet group M, and the set positions of the pole magnets are fixed. Thus, the electron beam adjusting device of the present invention can be used as a non-lock ring type electron beam adjusting device by removing the lock ring, and can be used as a lock ring type electron beam adjusting device by attaching the lock ring.

[0024]

[Effect of device]

 The electron beam adjusting device of the present invention has an annular locking wall having an elastic pressing piece elastically deformed in the axial direction of the cylindrical holder on the outer peripheral surface of the cylindrical holder, and is elastically deformable in the radial direction. The locking claw and the locking claw are integrally molded at a predetermined interval so that the magnet group can be mounted between the annular locking wall and the locking claw in a pinched state, and the magnet group is sandwiched by the annular locking wall. Since the lock ring can be attached to the opposite side to this, this electron beam adjusting device can be used as a non-lock ring type electron beam adjusting device when the lock ring is removed, while it can be used as a lock ring type when the lock ring is attached. It can be used as an electron beam adjusting device. Therefore, it is no longer necessary to separately prepare a non-lock ring type electron beam adjusting device and a lock ring type electron beam adjusting device as in the past. There is no need to separately prepare a molding die. Further, since the same automatic assembling machine can be used for the non-lock ring type and the lock ring type electron beam adjusting device at the time of assembling, the amount of investment can be significantly reduced.

Further, in the electron beam adjusting device of the present invention, since the annular locking wall is positioned between the magnet group and the lock ring, the magnet group can be adjusted like the conventional lock ring type electron beam adjusting device. Since the spacer ring interposed between the lock ring and the lock ring can be omitted, there are advantages that the number of parts can be reduced and the number of assembling steps can be shortened.

[Brief description of drawings]

FIG. 1 shows a first embodiment of an electron beam adjusting device of the present invention assembled in the form of a non-lock ring type, wherein (a) is a front view and (b) is a side view.

2A and 2B show a cylindrical holder used in the first embodiment, wherein FIG. 2A is a front view and FIG. 2B is a side view.

FIG. 3 shows a lock ring used in the first embodiment,
(A) shows a front view and (B) shows a side view.

FIG. 4 shows a state in which the first embodiment is assembled in the form of a lock ring type, where (a) is a front view and (b) is
Shows a side view.

FIG. 5 shows a second embodiment of the electron beam adjusting apparatus of the present invention assembled in the form of a non-lock ring type, (a) is a front view and (b) is a side view.

FIG. 6 shows a cylindrical holder used in the second embodiment, (a) is a front view and (b) is a side view.

FIG. 7 shows a state in which the second embodiment is assembled in the form of a lock ring type, where (a) is a front view and (b) is
Shows a side view.

8A and 8B show an example of a conventional front lock ring type electron beam adjusting device, in which FIG. 8A is a front view and FIG. 8B is a side view.

9A and 9B show a cylindrical holder used in the conventional front lock ring type electron beam adjusting apparatus, in which FIG. 9A is a front view and FIG. 9B is a side view.

10A and 10B show an example of a conventional rear lock ring type electron beam adjusting device, in which FIG. 10A is a front view and FIG. 10B is a side view.

FIG. 11 shows a cylindrical holder used in the conventional rear lock ring type electron beam adjusting device, in which (a) is a front view and (b) is a side view.

12A and 12B show an example of a conventional non-lock ring type electron beam adjusting device, in which FIG. 12A is a front view and FIG. 12B is a side view.

13A and 13B show a cylindrical holder used in the conventional non-lock ring type electron beam adjusting apparatus, wherein FIG. 13A is a front view and FIG. 13B is a side view.

FIG. 14 shows a spring-type spacer ring used in the conventional non-lock ring type electron beam adjusting device,
(A) shows a front view and (B) shows a side view.

FIG. 15 shows a state in which the front lock ring type electron beam adjusting device shown in FIG. 8 is used with the lock ring removed, (a) is a front view, and (b) is a side view.

16 shows a state in which the rear lock ring type electron beam adjusting device shown in FIG. 10 is used with the lock ring removed, (a) showing a front view, and (b) showing a side view.

[Explanation of symbols]

 1 Purity adjustment 2-pole magnet 2 Convergence adjustment 6-pole magnet 3 Convergence adjustment 4-pole magnet 1a Purity adjustment 2-pole magnet 2a Convergence adjustment 6-pole magnet 3a Convergence adjustment 4-pole magnet 4 Spacer ring 5 Spacer ring 6 Spacer Ring 7 Cylindrical holder 8 Cylindrical body 9 Locking claw 10 Elastic pressing piece 11 Annular locking wall 12 Leg piece 13 Tapered surface 14 Tooth part 15 Lock ring 16 Sloping groove 17 Cylindrical body 18 Screw part 19 Locking claw 20 Cylindrical holder 21 Lock ring a Screw part b Annular locking wall c Cylindrical holder d Lock ring e Tightening band f Locking claw g Screw part h Cylindrical holder i Lock ring j Cylindrical holder k Spacer ring m Magnet group M magnet group

Claims (1)

[Scope of utility model registration request] 1. An annular locking wall having an elastic pressing piece elastically deformed in an axial direction of the cylindrical body on an outer peripheral surface of the cylindrical body,
A cylindrical holder in which a locking claw that is elastically deformable in the radial direction of the cylindrical body is integrally formed at a predetermined interval, and a pair of two ring-shaped adjusting magnets are provided in the cylindrical holder. A plurality of pairs of magnets are mounted in combination, one end side of the mounted magnet group is positionally controlled by the locking claw, and the other end side is pressed by the elastic pressing piece of the annular locking wall to temporarily fix the magnet group. In addition, the lock ring, which is provided on the opposite side of the magnet group across the annular locking wall, can be tightened with a lock ring as a fastener if necessary. The ring strengthens the urging force of the elastic pressing piece of the annular locking wall to become a lock ring type electron beam adjusting device, and when the lock ring is removed, a non-lock ring type electronic beam adjusting device is used. Electron beam controller characterized by comprising a beam adjustment device.