JP3072567U - CRT socket - Google Patents

Abstract

(57) [Summary] A signal contact portion of a CRT is made low and the whole is made thin. A socket body comprising: a cylindrical central hole penetrating from the front to the back; a signal contact disposed on the same outer concentric circle as the cylindrical central hole and capable of engaging with a signal terminal of a CRT; A CRT socket comprising: an insulating cover portion provided with high-voltage connecting means arranged in the same concentric circle as the contact and capable of engaging with the focus terminal of the CRT, wherein the signal contact is in contact with the signal terminal of the CRT. And a discharge plate formed at the base of the contact portion, and the discharge plate and the ground terminal for removing the discharge state are arranged in opposition to each other.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a cathode ray tube (CRT) socket. More specifically, an object of the present invention is to provide a CRT socket having a structure in which the height of the socket itself is reduced.

[0002]

[Prior art]

 As shown below, CRT sockets in the prior art have various shapes. For example, the first specific example is disclosed in Japanese Utility Model Laid-Open Publication No. Sho 59-173289, "Socket for cathode ray tube". As shown in FIGS. 8 and 9, this socket is composed of a socket body 10 formed in a cylindrical shape and an insulating cover portion 11 formed in a substantially square shape.

The socket body 10 has a cylindrical center hole 12 penetrating from the front and back, and a high-voltage contact portion 13 and a signal contact portion 14 provided on the same center along the circumference of the cylindrical center hole 12. It has a structure provided with. The high-voltage contact section 13 is arranged with a gap with the signal contact section 14, and has a structure in which a high-voltage contact 15 is arranged at a substantially central position from the back side of the case body 10.

The signal contact section 14 has a structure including a signal contact 16 that contacts a signal terminal of a CRT and a ground terminal 17 that discharges a high voltage generated in the signal contact 16. The signal contact 16 is composed of a cylindrical connection terminal 18 which engages with a signal terminal of a CRT neck on the distal end side, and a lead wire connection terminal 19 which is formed by being bent outward at a right angle. . The ground terminal 17 has a structure in which a spherical cap 20 for discharging is disposed so as to face a substantially middle position of the lead terminal 19 of the signal contact 16.

As shown in FIG. 10, the second specific example has substantially the same structure as the first specific example, except that the discharge ground terminal 17A is housed and arranged inside the socket body 10. It is a structure that can be used. That is, the signal contact portion 14 provided on the circumference of the cylindrical center hole 12 penetrating through the front and back of the socket body 10 is composed of the signal contact 16 and the ground terminal 17A. The ground terminal 17A is housed and arranged inside the socket body 10, and has a structure in which an end 21 opposite to the engaged end is bent toward the signal contact 16 to form a discharge gap.

[0006]

[Problems to be solved by the invention]

 However, the CRT (cathode ray tube) sockets of the first and second embodiments shown in the prior art are firstly connected to a terminal in the middle of the signal contact in a physical positional relationship with a ground terminal for discharging the signal contact. There is a problem that the height of the socket body cannot be reduced because the discharge gap is obtained by facing the ground terminals.

[0007] Therefore, there is a problem to be solved by improving the positional relationship of the discharge ground terminal provided in the signal contact to reduce the height of the CRT socket itself.

[0008]

[Means for Solving the Problems]

 In a CRT socket comprising a socket body provided with a signal contact for contacting a signal terminal of a CRT and an insulating cover portion provided with a high-voltage contact capable of engaging with a focus terminal of the CRT, the socket body includes: A signal contact hole for accommodating the signal contact is formed, and the signal contact includes a contact portion formed by folding one end side of one elongated metal plate that contacts the signal terminal, and A discharge plate formed at the base of the contact portion, and press-fitted into the signal contact hole from the back surface side of the socket body to expose a part of the contact portion in the signal contact hole. A ground terminal, which is provided and removes a discharge state, is disposed so as to face the discharge plate.

[0009]

[Embodiment of the invention]

 Next, an embodiment of a CRT socket according to the present invention will be described with reference to the drawings. The same components as those in the prior art will be described with the same reference numerals.

As shown in FIGS. 1 to 4, the CRT socket according to the present invention includes a socket body 10C which engages with a terminal of a cathode ray tube (CRT) neck, and a box-shaped portion of the socket body 10C. And an insulating cover portion 11C fitted from above.

The socket body 10C has a cylindrical center hole 12B formed at the center position formed in a cylindrical shape, and is opened through the front and back sides. The signal connection which can be engaged with the signal terminal of the CRT on a concentric circle around the hole. Means, ie, a signal contact recess 42 is provided. The insulating cover portion 11C has high-voltage connecting means capable of engaging with the focus terminal of the CRT, that is, the high-voltage contact concave portion 40 and the low-voltage contact concave portion 41 on the same concentric circle as the signal contact concave portion 42. Is provided. Each of the high-voltage contact recess 41, the low-voltage contact recess 41, and the signal contact recess 42 is physically separated by first, second, and third grooves 43, 44, and 45 penetrating from front to back. It has a structure. A high-voltage lead holding portion 55 for holding a high-voltage lead from a flyback transformer is provided at the rear end of the insulating cover portion 11C, and a low-voltage lead for holding a low-voltage lead from the flyback transformer is provided at the front end. It has a structure provided with a line holding portion 56. As shown in FIG. 3, terminals 57 and 58 are provided inside the holding portions 55 and 56.

As shown in FIGS. 1 to 5, the high-voltage contact recess 40 is separated by a first groove 43 and a second groove 44, cuts off the cylindrical center hole 12B side, and goes in the depth direction. And a high-pressure contact hole 47 is provided in a portion of the concave surface 46 on the side of the cylindrical center hole 12B. The high-pressure contact hole 47 has a structure in which a high-pressure contact (focus contact) 48 is inserted from behind the socket body 10C and press-fitted and locked. Partition walls 50 and 51 (see FIGS. 4 and 5) are provided between the depressed surface 46 and the first groove 43 and between the depressed surface 46 and the second groove 44. The height of the partition walls 50 and 51 increases the creepage distance for restricting the discharge state of the high voltage contact 48.

As shown in FIGS. 2 and 3, the high-voltage contact 48 is connected to a high-voltage lead connection terminal 57 that holds a terminal of a high-voltage lead from a flyback transformer via a protection resistor 52. . Further, as shown in FIG. 3, the high voltage contact 48 has a structure in which the high voltage contact 48 is connected to the discharge cap 53 at a position where the high voltage contact 48 branches off from the protection resistor 52. Discharge caps 54 having a symmetrical shape with the discharge caps 53 are arranged at predetermined intervals. The discharge cap 54 has a structure provided with a terminal (not shown) for discharging to the outside.

As shown in FIGS. 1 to 5, the low-voltage contact recess 41 is formed symmetrically with the high-voltage contact recess 40, and is physically formed by the second groove 44 and the third groove 45. A fan-shaped depressed surface 60 that is separated and cut away on the cylindrical center hole 12B side and expands in the depth direction, and a low-pressure contact hole 61 is provided in a portion of the depressed surface 60 on the cylindrical center hole 12B side. Structure. The low-pressure contact hole 61 has a structure in which a low-pressure contact 62 is inserted from behind the socket main body 10C and pressed and locked. Partition walls 63 and 64 (see FIGS. 4 and 5) are provided between the depressed surface 60 and the second groove portion 44 and between the depressed surface 60 and the third groove portion 45. The height of the partition walls 63 and 64 increases the creepage distance for restricting the discharge state of the low-voltage contact 62. Further, as shown in FIG. 3, the low voltage contact 62 is connected to a low voltage lead connection terminal 58 for holding a terminal of a low voltage lead from a flyback transformer.

As shown in FIGS. 1 and 2 and FIGS. 4 and 5, the signal contact recess 42 is located concentrically with the high-voltage contact recess 40 and has a curved shape along the cylindrical center hole 12B. It comprises a recessed surface 65 formed and a plurality of signal contact holes 66 provided within the recessed surface 65 at predetermined intervals. The signal contact hole 66 has a structure in which a signal contact 67 is inserted from the back side of the socket body 10C and press-fitted and locked. Of the signal contact holes 66, the signal contact holes 66a and 66b on the high voltage contact hole 47 and the low voltage contact hole 61 side are physically separated by the first groove 43 and the third groove 45 penetrating from the front and back, and further depressed. The creepage distance is increased by the partition walls 68 and 69 (see FIG. 4) corresponding to the height.

As shown in FIGS. 6 and 7, the signal contact 67 is mounted by press-fitting from the back side of the socket main body, and is folded back at one end side of one elongated metal plate into a letter shape. A bent contact portion 70 is formed, and a discharge plate 71 is formed at the base of the bent contact portion 70. The other end comprises a signal terminal 72 bent at a right angle in a direction opposite to the contact portion 70. The contact portion 70 of the signal contact 67 having such a structure is arranged in a state where a part thereof is exposed in the signal contact hole 66 (66a, 66b).

On the other hand, as shown in FIGS. 3 and 6, a ground terminal 75 formed in a notched band-like ring is provided at the outer circumferential center position of the contact portion 70 of the signal contact 67. ing. As shown in FIG. 6, the ground terminal 75 has a structure in which a tongue 76 having a lower end bent inward is provided at the position of the discharge plate 71 of the signal contact 67. Although not shown, the tongue 76 does not have to have a structure provided for all the signal contacts 67, and has a structure provided for the signal contact 67 for supplying a signal which must be discharged. The tongue portion 76 is disposed so as to face the discharge plate 71, that is, the discharge plate 71 and the ground terminal 75 are arranged side by side in the width direction of the socket body 10C. With such a structure, in the relationship between the contact portion 70 and the ground terminal 75, the width of the socket body 10C only needs to be secured in the lateral direction, and the height in the height direction is smaller than that of the prior art. It can be formed low.

In such a structure, the terminals of the neck 81 of the CRT 80, that is, the focus terminal (high-voltage terminal) 82, the signal terminal 83, and the low-voltage terminal are respectively high-voltage contact recesses 40 and signal contact recesses 42. Thus, the electrical connection with the contacts 48, 67, 62 can be obtained by fitting into the low-voltage contact recess 41.

[0019]

[Effect of the invention]

 As described above, the cathode ray tube socket according to the present invention has an effect that the height of the CRT socket itself can be reduced by improving the positional relation of the ground terminal for discharge.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a CRT socket according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view with the same part broken.

FIG. 4 is an enlarged perspective view of a portion of the high-voltage contact recess.

FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4, showing a relationship between the high-voltage contact and the low-voltage contact.

FIG. 6 is a sectional view taken along the line BB in FIG. 4 showing a portion of the signal contact.

FIG. 7 is a cross-sectional view taken along the line CC in FIG. 4, showing a state in which a terminal of a neck of a CRT is inserted into the cathode ray tube socket.

FIG. 8 is an overall perspective view of a CRT socket which is a first specific example in the prior art.

9 is a cross-sectional view in the central longitudinal direction in FIG.

FIG. 10 is a partially cutaway sectional view showing a second specific example in the prior art.

[Explanation of symbols]

11C; insulating cover portion, 12B; cylindrical central hole, 40;
High-pressure contact recess, 41; low-pressure contact recess,
42; signal contact recess, 43; first groove, 4
4; second groove, 45; third groove, 46;
7; high-pressure contact hole, 48; high-pressure contact, 55;
High voltage lead wire holding portion, 56; Low voltage lead wire holding portion, 6
0; Depressed surface, 61; Low pressure contact hole, 62; Low pressure contact, 65; Depressed surface, 66; Signal contact hole, 66
a; signal contact hole, 66b; signal contact hole, 6
7; signal contact, 72; signal terminal

Claims (1)

[Utility model registration claims] 1. A CRT socket comprising: a socket body having a signal contact for contacting a signal terminal of a CRT; and an insulating cover portion having a high-voltage contact capable of engaging with a focus terminal of the CRT. A signal contact hole for accommodating the signal contact is formed in the socket body, and the signal contact is
A contact portion formed by folding one end side of a single elongated metal plate contacting the signal terminal, and a discharge plate formed at the base of the contact portion, and the discharge plate formed at the base of the socket body, A ground terminal, which is press-fitted and locked in the signal contact hole, is disposed in the signal contact hole with a part of the contact portion exposed, and a ground terminal for removing a discharge state is disposed facing the discharge plate. A CRT socket characterized by having