JPH0528674Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a bobbin for winding a deflection coil of a cathode ray tube, and in particular a bobbin for a deflection coil that is divided into two in the circumferential direction and has a conductor holding groove on the inner surface for winding the deflection coil in a saddle shape. Regarding.

[Summary of the idea]

The present invention provides an engaging groove and an engaging claw that engage with each other at an intermediate position of a joint surface that joins each divided segment, and connects the two segments on a plane parallel to the joint surface. The engaging pawl is engaged with the engaging groove by relatively moving in a direction perpendicular to the axial direction, and a position regulating means is provided at the end of the joint surface to control the relative relationship between the two segments. When the two segments are engaged with each other due to movement, the position regulating means is used to regulate the position in the moving direction. The wound bobbins are connected to each other.

[Conventional technology]

A deflection coil is attached to the cathode ray tube of a TV receiver. The deflection coil is made of a synthetic resin and is divided into two in the circumferential direction by a conductor holding groove of the bobbin, as disclosed in, for example, Japanese Utility Model Publication No. 57-26529. It is designed to be wrapped in a garlic shape. The segments wrapped around the coil are joined together to form a circular assembly, and are attached to the neck of the cathode ray tube.

[Problem that the invention attempts to solve]

Since the bobbin around which such a deflection coil is wound is formed of a synthetic resin molded body, distortion may occur depending on the shape, molding conditions, etc. That is, when the two segments are combined with each other, a gap is created between the joint surfaces at an intermediate position in the front-rear direction. Since such a gap leads to variations in the performance of the deflection yoke, it is necessary to reduce the gap. After assembly, the joint surfaces were joined by ultrasonic welding. According to such measures, costs will rise due to an increase in the number of man-hours. For example, as disclosed in Japanese Utility Model Application Publication No. 55-80857,
A bobbin has been proposed in which a fitting portion is provided in the tapered portion at an intermediate position between the front end portion and the rear end portion, and the bobbin is locked by these fitting portions when joining. However, since the fitting portion is provided so as to protrude from the outer circumferential surface of the bobbin, there is a drawback that the fitting portion protrudes from the outer circumferential surface of the assembled bobbin. The present invention has been developed in view of these problems, and is designed so that when the segments constituting the bobbin are joined, no gap is created at the intermediate position of the joint surfaces, and the locking means protrudes outside. It is an object of the present invention to provide a bobbin for a deflection coil that is free from such problems.

[Means to solve the problem]

The present invention is a deflection coil bobbin in which segments divided into two in the circumferential direction are joined and assembled into one body, and includes a conductor holding groove for winding the deflection coil in a hollow shape on the inner surface of the segment; an engaging pawl that protrudes only in the circumferential direction and is provided at an intermediate position on one joining surface of the segment; and an engaging groove that is provided on the other joining surface of the segment and is engaged with the engaging pawl. and, in order to restrict the engagement position between the engagement claw and the engagement groove in the radial direction of the deflection coil bobbin, the circumferential direction provided at both ends of the joint surface of one of the segments The present invention relates to a bobbin for a deflection coil, comprising: a stopper that only protrudes; and a recess that is provided on the joint surface of the other segment and that engages with the stopper.

[Effect]

By joining one segment to each other, engaging the engaging claw of one segment with the engaging groove of the other segment, and engaging the stopper of one segment with the recess of the other segment, the radius can be adjusted. By positionally regulating the pair of segments in the direction, the pair of segments can be assembled in a state where they are joined to each other.

【Example】

FIG. 1 shows a deflection coil bobbin 10 according to an embodiment, and this bobbin is composed of a pair of segments 11 molded from a synthetic resin molded body. That is, the bobbin 10 has two parts in the circumferential direction.
The divided segments 11 can be assembled by joining them together. As shown in FIG. 2, a conducting wire holding groove 12 is formed on the inner surface of the segment 11, and claws 13 and 14 are formed on the front and rear ends, respectively. Further, a protrusion 15 is formed on the inner surface of the front end. Therefore, the conductor wire is wound in a saddle shape along the holding groove 12 so as to surround the protrusion 15, and the front and rear ends of the coil are engaged by claws 13 and 14, respectively. It is starting to be stopped. Next, a structure for coupling the pair of segments 11 to each other will be explained. Flange-like joint surfaces 16 bent into an arc shape are formed on both sides of the segment 11, respectively. An engagement groove 17 and an engagement claw 1 are provided at an intermediate position between these joint surfaces 16.
8 are formed respectively. Further, a stopper 19 and a recess 20 are provided at the front and rear ends of the joint surface 16.
Furthermore, a stepped portion 21 is formed within the recessed portion 20. Next, the operation of assembling the bobbin 10 as described above will be explained. A coil is previously wound around the inner surface of the segment 11 in a hollow shape using a conductive wire. Then, as shown in FIG. 3, the pair of segments 11 are brought close to each other so that the joint surfaces 16 are joined.
In this state, as shown in FIG. 4, the two segments 11 are relatively moved on a plane parallel to the joint surface and in a direction perpendicular to the axial direction, that is, in a lateral direction. Then, the engagement claw 18 is engaged with the engagement groove 17 formed at the intermediate position of the joint surface 16, as shown in FIG. This allows the pair of segments 11 to be joined. Furthermore, when both are properly aligned, stoppers 19 formed at the front and rear ends of the joint surface 16
As shown in FIG. 6, the recess 20 is engaged with the step 21 of the recess 20. The segments 11 and 12 thus connected to each other can be assembled with their positions correctly regulated in the lateral direction. According to such a deflection coil bobbin 10,
Assembling can be carried out by shifting the two segments 11 laterally with their joint surfaces 16 joined to each other, which simplifies assembly and greatly reduces the number of man-hours required. . Also, the engagement groove 17 is located at the intermediate position of the joint surface 16.
Since the two segments 11 are connected using the and the engaging claws 18, a gap 25 as shown by the chain line in FIG. 1 is not formed. Further, there is no need to perform ultrasonic welding to eliminate the gap 25. Furthermore, since the gap 25 is no longer formed, it becomes possible to stabilize the performance of the deflection yoke. Two more segments 1
Since both the coupling means and the positioning means of 1 are provided on the joint surface 16, these coupling means and positioning means do not protrude onto the outer peripheral surface of the assembled bobbin 10.

[Effect of the idea]

The present invention is a deflection coil bobbin in which segments divided into two in the circumferential direction are joined and assembled together, and the segment has a conductor holding groove for winding the deflection coil in a hollow shape on the inner surface of the segment, and an engaging pawl that protrudes only in the circumferential direction provided at an intermediate position on one joining surface of the segment; an engaging groove that is provided on the other joining surface of the segment and is engaged with the engaging pawl; Stoppers protruding only in the circumferential direction provided at both ends of one joint surface of the segment in order to restrict the engagement position of the deflection coil bobbin with the engagement groove in the radial direction of the deflection coil bobbin, and the joint of the other segment. A recess is provided on the surface and engages with the stopper. Therefore, by joining the engaging groove and the engaging claw with the two segments butted against each other, the joining can be easily and reliably performed, and it is possible to eliminate gaps between the joining surfaces. Furthermore, by engaging the stopper with the recess, the pair of segments can be correctly regulated in position in the radial direction. Since the engaging pawl and the stopper protrude only in the circumferential direction, the fitting portion does not protrude from the outer peripheral surface of the assembled bobbin, and the performance of the deflection yoke is stabilized. Moreover, since the lateral movement is restricted by the position restriction means during the joining operation, the assembly accuracy is significantly improved, and the pair of segments can be locked together in the correct position. Become.

[Brief explanation of the drawing]

Fig. 1 is a side view of a deflection coil bobbin according to an embodiment of the present invention, Fig. 2 is an external perspective view of segments constituting this bobbin, Fig. 3 is a side view showing the joining operation, and Fig. 4 5 is an enlarged cross-sectional view showing the engagement between the engaging groove and the engaging pawl, and FIG. 6 is a partially cutaway rear view showing the position regulating operation, and FIG. 6 shows the position regulating operation by the position regulating stopper. FIG. In addition, in the symbols used in the drawings, 10...bobbin, 11...segment, 12...conductor holding groove,
16...Flanged joint surface, 17...Engagement groove, 1
8...engaging claw, 19...stopper, 20...recessed portion, 21...stepped portion.

Claims (1)

[Claims for Utility Model Registration] A deflection coil bobbin constructed by joining two segments in the circumferential direction and assembling them as one body, the conductor wire having a deflection coil wound in a hollow shape on the inner surface of the segment. a retaining groove; an engaging pawl provided at an intermediate position on one joint surface of the segment and protruding only in the circumferential direction; and an engaging pawl provided on the other joint surface of the segment and engaged with the engaging pawl. an engagement groove provided at both ends of the joint surface of one of the segments for regulating the engagement position between the engagement pawl and the engagement groove in the radial direction of the deflection coil bobbin. A bobbin for a deflection coil, comprising: a stopper that projects only in the circumferential direction; and a recess that is provided on the joint surface of the other segment and engages with the stopper.