JPH0515302U - Deflection yoke device - Google Patents

Abstract

(57) [Abstract] [Purpose] The convergence correction magnet is housed and fixed in the magnet housing recess 6 of the bobbin 1 of the deflection yoke so as not to fall off. A bottom wall 3 and side walls 4 and 5 are provided on a peripheral surface portion of an enlarged diameter portion of a bobbin 1 of a deflection yoke to form a magnet accommodating concave portion 6. An inverted U-shaped slit 10 is provided on the peripheral wall 8 of the magnet housing recess 6 to form a tongue-shaped spring plate portion 11,
A locking claw 12 is provided on the upper end of the spring plate portion 11. At the position where the magnet is completely inserted into the magnet housing recess 6, the locking claw 12 is locked to the upper end of the magnet by using the elastic restoring force of the spring plate portion 11, and the magnet is housed and fixed in the magnet housing recess 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a deflection yoke device in which a magnet for convergence correction is mounted on a peripheral surface portion of a head enlarged diameter portion of a bobbin of the deflection yoke.

[0002]

[Prior Art]

 As the screen of the cathode ray tube of color television receivers and color display devices has become larger, the green G is curved and misaligned (Fig. 11) and blue B and red R at the upper and lower intermediate positions on the left and right sides of the screen. A cross misconvergence (not shown) that shifts in the vertical direction appears, and in order to correct this, as shown in FIG. 9, it is the peripheral surface of the head enlarged diameter portion of the bobbin 1 of the deflection yoke. Convergence correction magnets 2 are mounted at locations corresponding to the diagonal positions of the cathode ray tube.

FIG. 10 shows a mounting portion of the magnet 2, in which a bottom wall 3 and side walls 4 and 5 are provided on the peripheral surface of the bobbin 1 to form a magnet accommodating concave portion 6 opening to the neck side of the deflection yoke. Then, the magnet 2 is fitted into the magnet housing recess 6, and the magnet 2 is fixed to the magnet housing recess 6 by using an adhesive.

[0004]

[Problems to be solved by the device]

 However, since the conventional device is a system in which the magnet 2 is held in the magnet housing recess 6 only by the adhesive force of the adhesive, the adhesive amount is too small and the adhesive force is weak or the adhesive force is relatively strong. Both of them have a problem in that the magnet 2 falls off from the opening 7 of the magnet housing recess 6 when subjected to vibration.

Further, when the amount of the adhesive is increased in order to increase the adhesive force, a large amount of the adhesive enters between the magnet 2 and the bottom wall 3 and the magnet 2 floats from the set position to the opening 7 side. There was a problem that the misalignment correction amount changed due to the position shift.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to prevent the magnet from falling out of the magnet accommodating recess even when the adhesive force is weak or vibration is applied. Another object of the present invention is to provide a deflection yoke device having a magnet housing recess that prevents the magnet from floating and being displaced.

[0007]

[Means for Solving the Problems]

 The present invention is configured as follows to achieve the above object. That is, the present invention provides a deflection yoke device in which a magnet accommodating recess is formed in a peripheral surface of a head expanding diameter part of a bobbin of a deflection yoke, and a convergence correction magnet is fixedly accommodated in the magnet accommodating recess. A slit is provided on the wall surface of the magnet accommodating concave portion to form an elastically deformable spring plate portion, and the spring plate portion is provided with a locking claw for locking the magnet accommodated in the magnet accommodating concave portion. It is characterized by that.

[0008]

[Action]

 In the present invention having the above-mentioned structure, when the magnet is inserted into the magnet accommodating recess, the magnet abuts on the locking claw, and the spring plate portion provided with the locking claw is pushed and expanded to further extend into the magnet accommodating recess. Insert it. Then, at the insertion completion position, the locking claw locks with the magnet by the elastic restoring force of the spring plate portion, and the locked state is maintained stable.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the description of this embodiment, the same reference numerals will be given to the same names as those in the conventional example, and detailed description thereof will be omitted. 1 to 3 show the essential structure of a first embodiment of a deflection yoke device according to the present invention. Also in the deflection yoke device in this embodiment, the bottom wall 3 and the side walls 4 and 5 are provided on the peripheral surface portion of the enlarged head diameter portion of the bobbin 1 to form the magnet accommodating recessed portion 6 as in the prior art example.

A characteristic of the present embodiment is that a tongue-shaped spring plate portion 11 is formed by forming an inverted U-shaped slit 10 on the peripheral wall 8 of the bobbin 1, and the upper end side of the spring plate portion 11 is formed. That is, the locking claw 12 is projecting outward. The height of the locking claw 12 with respect to the bottom wall 3 is set to be equal to or slightly larger than the height of the magnet 2 housed in the magnet housing recess 6.

In the first embodiment, when the magnet 2 is inserted from the opening 7 side of the magnet accommodating recess 6, the magnet 2 pushes the locking claws 12 in the retreating direction by elastic deformation of the spring plate portion 11. When the magnet 2 is inserted and comes into contact with the bottom wall 3 of the magnet accommodating recess 6, the upper end of the magnet 2 gets over the locking claw 12, and the locking claw 12 is elastically restored to the spring plate part 11. The magnet 2 is fixed to the magnet accommodating recess 6 by being locked to the upper end surface of the magnet 2 by force.

Due to the locking action of the locking claws 12, the magnet 2 does not fall off from the magnet housing recess 6 even when subjected to vibration, and is stably fixed in the magnet housing recess 6. When fixing the magnet 2, an adhesive is used if necessary.

FIG. 4 shows the configuration of the essential parts of a second embodiment of the present invention. The second embodiment is different from the first embodiment in that the locking claw 12 formed on the upper end side of the spring plate portion 11 is formed in a protruding shape (botch-shaped), and other configurations are the same. This is the same as the first embodiment. Also in the second embodiment, the locking claw 12 is locked to the upper end surface of the magnet 2 at the position where the magnet 2 is completely housed in the magnet housing recess 6 as in the first embodiment, Can be fixed to the magnet accommodating recess 6, and the same effect as the first embodiment can be obtained.

FIG. 5 shows the configuration of the essential parts of a third embodiment of the present invention. In the third embodiment, a pair of left and right slits 10 are provided on the peripheral wall 8 of the head enlarged diameter portion of the bobbin 1, and the wall portion between the slits is a spring plate portion 11, and the spring plate portion 11 has a protrusion. -Shaped locking claws 12 are projected outward, and locking recesses 13 are provided on the magnet 2 side at positions corresponding to the locking claws 12. Other configurations are the same as those of the first embodiment. Similar to the example. In the second embodiment, when the magnet 2 is inserted into the magnet accommodating recess 6, the lower end side of the magnet 2 comes into contact with the locking claw 12 so that the spring plate portion 11 moves in the retracting direction of the locking claw 12. When the magnet 2 is inserted into the magnet accommodating recess 6, the engaging claw 12 faces the engaging recess 13, and the engaging claw 12 of the spring plate 11 is inserted. The magnet 2 is locked in the locking recess 13 by the elastic restoring force, so that the magnet 2 is prevented from coming off from the magnet housing recess 6 and is fixedly held in the positioned state.

FIG. 6 shows a main configuration of a fourth embodiment of the present invention. In the fourth embodiment, when the magnet 2 to be used has a height substantially equal to or higher than the height of the peripheral wall 8 of the bobbin 1, only the portion of the peripheral wall 8 of the magnet housing recess 6 is used. The height of the peripheral wall 8 is increased by bulging the neck so that the height of the locking claw 12 formed on the tongue-shaped spring plate portion 11 matches the height of the magnet 2. The other construction is the same as that of the first embodiment. Also in the fourth embodiment, similarly to the first embodiment, the locking claw 12 is locked to the upper end surface of the magnet 2 to lock and fix the magnet 2 in the magnet housing recess 6.

FIG. 7 shows a main configuration of a fifth embodiment of the present invention. In the fifth embodiment, a U-shaped slit 10 is formed in the peripheral wall 8 of the magnet accommodating recess 6 to form a tongue-shaped spring plate portion 11 extending downward, and the lower end side of the spring plate portion 11 is formed. The locking claws 12 are provided on the outer surface of the locking claws 12 in an outwardly projecting manner. Also in this fifth embodiment, when the magnet 2 is inserted into the housing recess 6, the locking claw 12 is pushed in the retracted direction by the elastic deformation of the spring plate portion 11 and the magnet 2 is inserted. When the magnet 2 is completely inserted into the magnet accommodating recess 6, the magnet 2 rides over the locking claw 12, so that the locking claw 12 is locked to the upper end surface of the magnet 2 by the restoring force of the spring plate 11. Therefore, the fixed holding of the magnet 2 is achieved.

FIG. 8 shows a main configuration of a sixth embodiment of the present invention. In the sixth embodiment, a U-shaped slit 10a and an inverted U-shaped slit 10b are formed on the peripheral wall 8 of the magnet accommodating recess 6 in the vertical direction with a predetermined space therebetween, and are formed by the slit 10a. A tongue-shaped spring plate portion 11a having a locking claw 12a protruding outward from the lower end thereof, and a tongue-shaped spring plate portion 11b formed by a slit 10b having a protruding claw. 12b is provided so as to project outward, and a locking recess 13 is provided on the magnet 2 side at a position corresponding to the locking claw 12b.

In the sixth embodiment, when the magnet 2 is inserted into the magnet accommodating recess 6, the elastic restoring force of the spring plate portions 11a and 11b pushes the locking claws 12a and 12b in the retreating direction to spread the magnet 2. When the magnet 2 is inserted and the magnet 2 is completely inserted into the magnet accommodating recess 6, the magnet 2 rides over the locking claw 12a and the locking recess 13 faces the locking claw 12b. As a result, the locking claw 12b is locked. The locking claw 12a is locked to the upper end surface of the magnet 2 by the elastic restoring force of the spring plate portion 11a, and the magnet 2 is locked by the locking claws 12a and 12b. It is fixed in the magnet housing recess 6. In the sixth embodiment, the locking claw 12b is fitted into the locking recess 13 and locked, whereby the positioning of the magnet 2 can be reliably achieved.

The present invention is not limited to the above-mentioned embodiments, but can take various modes.

[0020]

[Effect of the device]

 According to the present invention, a slit is provided on the wall of the magnet accommodating recess to form a resiliently deformable spring plate, and the spring claw is provided with a locking claw, so that the magnet is accommodated in the magnet accommodating recess. When this happens, the magnet uses the elastic restoring force of the spring plate to cause the locking claw to lock with the magnet, and this locking force securely locks and fixes the magnet in the housing recess, and vibrates. The magnet does not fall out of the magnet housing recess even if it is received.

Therefore, since the magnet can be held and fixed without using an adhesive, the workability of holding and fixing the magnet can be improved.

Further, even when an adhesive is used as needed, the magnet is locked by the locking claws to regulate the position. Therefore, even if the adhesive is used, the lower end surface of the magnet and the bottom of the magnet accommodating concave portion are not fixed. Even if the magnet gets in between the wall and the magnet, it will not float up from the set position and will not be displaced beyond the allowable range.This may cause a change in the correction amount due to the displacement of the magnet. Therefore, it is possible to accurately correct the misconvergence.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main configuration of a first embodiment of a deflection yoke device according to the present invention.

FIG. 2 is a front view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an explanatory view of a second embodiment of the present invention.

FIG. 5 is an explanatory view of a third embodiment of the present invention.

FIG. 6 is an explanatory view of a fourth embodiment of the present invention.

FIG. 7 is an explanatory view of a fifth embodiment of the present invention.

FIG. 8 is an explanatory view of a sixth embodiment of the present invention.

FIG. 9 is a rear view of a general deflection yoke device in which a convergence correction magnetic field is provided at a diagonal position of a head enlarged diameter portion of a bobbin of the deflection yoke, as viewed from the neck side.

FIG. 10 is a perspective explanatory view showing details of a magnet housing portion of FIG. 9.

FIG. 11 is an explanatory diagram showing an example of misconvergence that occurs on the screen of the cathode ray tube.

[Explanation of symbols]

 1 bobbin 2 magnet 6 magnet accommodating recess 8 peripheral wall 10, 10a, 10b slit 11, 11a, 11b spring plate part 12, 12a, 12b locking claw 13 locking recess

Claims (1)

[Scope of utility model registration request] 1. A deflection yoke device in which a magnet accommodating recess is formed in a peripheral surface of a head enlarged diameter portion of a bobbin of a deflection yoke, and a magnet for convergence correction is accommodated and fixed in the magnet accommodating recess. A slit is provided on the wall surface of the recess to form an elastically deformable spring plate portion, and the spring plate portion is provided with a locking claw for locking the magnet housed in the magnet housing recess. Characteristic deflection yoke device.