JPS6236232Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cathode ray tube socket in which, when an overvoltage is erroneously applied to a contact, the overvoltage is reduced to ground by discharge of a discharge gap element.

In conventional cathode ray tube sockets of this type, especially in high voltage discharge gap elements connected to contacts to which high voltage is applied, at least one electrode on the contact side is formed by press working. In some cases, there may be burrs, etc. on the cut surface, or there may be erroneous discharge between that part and other electrodes.
There was a risk that the discharge would occur at a voltage lower than the predetermined discharge starting voltage. In order to prevent this kind of influence, it is necessary to cover the cut points and angular parts with the body of the socket or other resin material attached to it, and for this reason, the overall shape of the high voltage electrode housing section There was a growing flaw. Further, due to these points, it has been difficult to make the discharge electrode housing portion small and to obtain a predetermined high discharge starting voltage.

From this point of view, this invention forms a bent part by bending and extending a part or the entire circumference of the periphery of the electrode part in a direction opposite to the protruding direction of the discharge electrode protruding from the electrode part. As a result, the burr part does not face the opposite discharge electrode, and there is no risk of unnecessary corona discharge occurring.Furthermore, there is no need for parts that cover the edges of the electrode, resulting in a compact design with a small number of parts. It has been made possible to do so.

Hereinafter, embodiments of the cathode ray tube socket according to this invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a body 11 made of insulating material is provided,
In this example, the body 11 of the insulating material has a substantially thick disk shape as a whole, and a circular recess 12 is formed in the center, and contact housing portions 13 are equally spaced on a circle around the circular recess 12. are formed in multiple numbers. On the outside of the arrangement circle of the contact accommodating portion 13, an arc-shaped discharge gap accommodating portion 14 is formed concentrically with the circular recess 12 from the back side of the body 11, and the back surface of the body 11 is covered with a back cover 15. has been done.

One side of the body 11 is a high voltage discharge gap housing part 1.
6, and this high voltage discharge gap housing portion 16 is covered from the front side by a square cylindrical front cover 17. An arcuate groove 18 is formed on the front side of the body 11 between the arrangement circle of the contact accommodating part 13 and the discharge gap accommodating part 14 and concentrically therewith. On the arrangement circle of the contact housing portion 13,
One of them is a high voltage contact accommodating part 19, and on both sides of the contact accommodating part 19, radial grooves 21 and 22 are formed in the body 1 to improve insulation.
1.

The contact housing portion 13 has a contact body 23.
As shown in FIG. 4, the contact body 23 in this example is made of a metal plate bent into a cylindrical shape and narrowed at the front part. This is the case when a terminal pin is inserted so that contact can be made. However, the contact is not limited to this type of contact, and may be a so-called bi-hooket type contact body or other types of contacts. This contact body 2
3 is integrally formed with a connecting portion 24, that is, the connecting portion 2 is formed at a substantially right angle from the rear edge of the contact body 23.
4 is bent and extended. The connecting portion 24 is further bent and extended rearward on the inner surface of the outer circumferential wall of the body 11 to form a terminal 25 . The contact body 23, the connecting portion 24, and the terminal 25 constitute a contact 26.

The connecting portion 24 of the contact 26 is in contact with the back surface of the body 11 and extends across the discharge gap housing portion 14 to the inner surface of the outer peripheral wall of the body 11 . The connecting portion 24 is held against the body 11 by the back cover 15. The body 11 and the back cover 15 are connected, for example, by an adjacent connecting portion 24 (not shown in the figure).
In between, a boss formed integrally with the body 11 is inserted into a hole formed in the back cover 15, and its protruding end is expanded by hot caulking. In the figure, the heat caulked portion is shown as a spherical protrusion 27. A notch 28 is formed on the periphery of the back cover 15 in correspondence with each terminal 25, and the terminal 25 is formed in the notch 28.
are arranged and positioned. A high-voltage contact 29 is housed in the high-voltage contact accommodating portion 19 .

A discharge gap element 31 as shown in FIGS. 2 and 5 is housed in the discharge gap housing section 14. As shown in FIG.
In the discharge gap element 31, one ends of a pair of electrodes 32, 33 are closely opposed to each other, and the electrodes 32, 33 are held by a holding piece made of an insulating material, a frame-shaped holding piece 34 in the figure. The holding piece 34 and the electrodes 32, 33 are integrally formed by molding. One electrode 32 has a connecting piece 35 integrally extended from the holding piece 34 on both sides, and a plurality of discharge gap elements 31 are connected to the connecting piece 35.
are sequentially connected through. In this example, the connecting pieces 35 of these discharge gap elements 31 are integrally formed. The other electrode 33 extends and projects from the holding piece 34 to serve as an electrode terminal 36 . These discharge gap elements 31 are provided corresponding to each contact 26, and in FIG. 1, the contacts 26 and discharge gap elements 31 are arranged radially around the circular recess 12.

Each discharge gap element 31 forms a discharge gap between the electrodes 32 and 33 that discharges when a voltage of a predetermined value or higher is applied therebetween. However, the discharge gap element 31' has electrodes 32 and 33 connected together to form a ground terminal 37. One electrode 32 of each discharge gap element 31 is electrically connected to this ground terminal 37 through the connecting pieces 35 in sequence. The connecting piece 35 is bent into an arc shape as a whole, and the thickness of the holding piece 34 is made approximately equal to the groove spacing of the discharge gap accommodating part 14, so that the discharge gap element 31 is almost fitted into the accommodating part 14. be accommodated. Further, in this example, one electrode 32 has a small notch 38 formed in the center of the opposite end of the electrode 33, forming two discharge gaps between the electrodes 32 and 33.

Connection between one electrode terminal 36 of the discharge gap element 31 and the connecting portion 24 of the contact 26 is performed as follows. As shown in FIGS. 2 and 4, an insertion hole 41 is formed in the connecting portion 24, and the insertion hole 41 is preferably in the form of a slit extending in the width direction of the connecting portion 24. Furthermore, the length of the insertion hole 41 is slightly larger than the width of the electrode terminal 36,
Moreover, it is preferable that the width be slightly larger than the thickness of the electrode terminal 36. The electrode terminal 36 is inserted into the insertion hole 41 on both sides of the insertion hole 41 of the connecting portion 24.
In other words, the clamping pieces 42 and 43, which face both ends of the slit-shaped insertion hole 41 and are integral with the connecting part 24, are bent and extended, and the clamping pieces 42 and 43 are bent and extended.
The inserted electrode terminal 36 is elastically clamped. That is, in the figure, the holding pieces 42 and 43 are bent and extended so as to approach each other on the back cover 15 side, and their ends are made to come into elastic contact with both side edges of the electrode terminal 36. Note that the electrode terminal 36
As shown in FIGS. 2 and 5, after being bent and extended toward each corresponding contact side, that is, toward the center of the body 11, it is bent and extended toward the rear side.

The terminal 3 is inserted through the insertion hole 41 so that the clamping pieces 42, 43 and the electrode terminal 36 are sufficiently connected elastically.
6 is inserted between the clamping pieces 42 and 43, the ends of the clamping pieces 42 and 43 are expanded due to elastic deformation, and the ends of the electrode terminal 36 are cut at both corners to facilitate the operation. It is dropped and tapered. In order to stabilize the clamping of the electrode terminal 36 by the clamping pieces 42 and 43, each clamping piece 4 is attached as shown in the figure.
A positioning recess 44 having a tapered shape extending in the direction in which the clamping pieces 42 and 43 protrude in the center of the ends of the clamping pieces 42 and 43.
It is preferable that the electrode terminals 36 be extruded outward from each other so that both side edges of the electrode terminal 36 are inserted into the recesses 44, respectively. In the example shown in FIGS. 2 and 4, a concentric circular recess 12 is formed in the back cover 15 so that the holding pieces 42, 43 and the electrode terminal 36 protruding from these are arranged. A shallow arcuate groove 46 is formed.

As shown in FIG. 2, the high voltage discharge gap accommodation section 16
A high voltage discharge gap 51 is housed inside. That is, a connecting portion 52 is integrally extended from the rear end of the contact 29, and this connecting portion 52 is connected to the housing portion 1.
It contacts the inner surface of the bottom plate of No. 6 and is folded back, and is further bent and extended outward to form an electrode portion 53, and further extended outward from this to form a high voltage terminal 54. A second discharge electrode 55 having a hemispherical shape in the figure is extruded from the center of the electrode portion 53 . Figures 2 and 7
As shown in FIGS. 9 to 9, this second discharge electrode 55
A first discharge electrode 56 formed by bending a metal rod into a U-shape faces the first discharge electrode 56, and a high-voltage discharge gap 51 is formed between these electrodes. The ends of both legs of the U-shape of the first discharge electrode 56 are laterally bent and extended outward from each other and fixed to both side walls of the accommodating part 16, and one of the legs is further bent outward and extended backward. Ground terminal 57
It is said that

In this invention, both sides of the electrode portion 53 are bent and extended toward the opposite side from the second discharge electrode 55 to form bent portions 58 and 59. The four bent corners 61 constituted by the electrode part 53 and the bent parts 58 and 59 are integrally connected to the bottom plate 16a of the high-pressure discharge gap accommodation part 16, as shown in FIGS. 8 and 9. The protruding bosses 62 are expanded by hot caulking so that these corners 61 are hidden from the second discharge electrode 55 side.

According to the cathode ray tube socket according to the invention described above, a part of the periphery of the electrode part 53, in this example, both side parts, are bent as bent parts 58 and 59.
Therefore, the boundary between the electrode portion 53 and the bent portions 58 and 59 is a curved surface, and there is no possibility that unnecessary corona discharge will occur between these and the first discharge electrode 56. Furthermore, even if there is a press burr on the periphery of the electrode part 53, the bending parts 58 and 59 will remove it from the first
It is separated from the discharge electrode 56, and there is no risk of corona discharge occurring between them. Therefore, the electrode can be easily made by press working. If the bent corner portion 61 of the electrode is made smaller and there is a risk of corona discharge with the first discharge electrode 56, this portion should be replaced with the boss 6 as described above.
By crushing the boss 2 and hiding it from the first discharge electrode 56, unnecessary corona discharge can be avoided without providing any separate parts.Moreover, by crushing the boss, the electrode part 53 can be hidden from the first discharge electrode 56. It can be fixed to the part.

In this way, the second discharge electrode 55 and the contact can be made integrally by press working, and even if the size is made small, there is no risk of unnecessary corona discharge, etc., and the presence of the bent part makes it possible to press Since the distance between the burr during processing and the first discharge electrode 56 becomes larger, there is no need to cover the edges of the press processing with other insulating parts, and the number of parts can be reduced and the structure can be made smaller. . In addition, in the example, the second
Although the bent portions are formed only on both sides of the discharge electrode 55, the bent portions may be formed over the entire periphery.

Further, in the embodiment described above, when one electrode terminal 36 is inserted into the insertion hole 41 formed in the connecting portion 24 of the contact, it is elastically clamped between the clamping pieces 42 and 43, and the terminal 36 and the contact 26 are electrically connected. Connected. Therefore, compared to connecting these by soldering, the connection work is much easier.
Moreover, it is held elastically by the clamping pieces 42 and 43, and if the insertion hole is shaped to approximately match the cross-sectional shape of the terminal 36 as shown in this example, the terminal 36 and the clamping piece There is no fear that the holding relationship with 42 and 43 will shift, and there is no risk that the elastically held state will collapse due to vibration or the like, and the contact state can be stably maintained. This retention is made more stable by engaging the terminal 36 with the tapered recess 44 as shown above.

In the above description, the clamping pieces 42 and 43 are extended to the protruding end side of the electrode terminal 36, but for example, as shown in FIG.
3 may be bent and extended. In this case, the clamping piece 4
The extension ends of 2 and 43 are folded back to the outside to make it easier to insert the terminal 36 between them. In the above description, the electrode terminal 36 is connected to the connection part 2 of the contact.
4, but conversely, for example, the first
As shown in Figure 1, cut and raise the piece 6 from the connecting part 24.
4 and inserting the cut and raised piece 64 into the insertion hole 65 formed in the electrode terminal 36,
A cut-and-raised piece 64 is attached to both sides of the insertion hole 65 by holding pieces 66 and 67 which are integrally bent and extended from the terminal 36.
may be held elastically.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a cathode ray tube socket according to this invention, Fig. 2 is a sectional view taken along line AA, Fig. 3 is a bottom view of Fig. 1, and Fig. 4 is a contact 26.
FIG. 5 is a perspective view showing a connected body of discharge gap elements, FIG. 6 is a cross-sectional view showing the connected state of contacts and electrode terminals 36, and FIG. 7 is a high voltage A perspective view showing an example of a discharge gap,
FIG. 8 is a perspective view showing the state in which the electrode part 53 is held on the bottom plate of the accommodating part, FIG. 9 is a sectional view taken along the BB line in FIG. 7, and FIG. 10 is a modification of the connection state between the contact and the electrode terminal. FIG. 11 is a sectional view corresponding to FIG. 6 showing the structure, and FIG. 11 is a perspective view corresponding to FIG. 4 showing still another example of the connection between the contact and the electrode terminal. 11: Body, 13: Contact housing, 1
4: Discharge gap housing section, 15: Back cover, 16: High voltage discharge gap housing section, 23: Contact body, 24:
Connection part, 25: Terminal, 26: Contact, 31:
Discharge gap element, 32, 33: electrode, 36: electrode terminal, 41, 65: insertion hole, 42, 43, 66, 6
7: Holding piece, 52: Connecting part, 53: Electrode part, 5
5: second discharge electrode, 56: first discharge electrode, 58,
59: Bent part.

Claims (1)

[Claims for Utility Model Registration] A contact to be brought into contact with a mating terminal pin is housed in a body made of an insulating material, a first discharge electrode is held in the body, and a second discharge electrode integral with the contact is opposed to the first discharge electrode. in a cathode ray tube socket in which a high-voltage discharge gap is formed between these electrodes, a substantially rectangular electrode portion disposed opposite to the first discharge electrode is formed to extend integrally with the contact; The central part of the electrode portion is pushed out into a hemisphere toward the first discharge electrode to form the second discharge electrode, and the high voltage discharge gap is formed between the first discharge electrode and the second discharge electrode, and the high voltage discharge gap is formed between the first discharge electrode and the second discharge electrode. A cathode ray tube socket in which both sides of the electrode part are bent and extended toward the opposite side from the second discharge electrode to form a bent part.