JPH0336064Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a socket for a cathode ray tube, which is equipped with a discharge hole that discharges the overvoltage to ground when an overvoltage occurs in the cathode ray tube.

``Prior art'' In this type of conventional cathode ray tube socket,
Contacts are arranged and held in a circular pattern within the body of the insulating material, and a grounding conductor is arranged in an arc shape facing the contact arrangement, and a discharge space is formed between these grounding conductors and the contacts. Ta.

In this conventional cathode ray tube socket, a ground terminal was integrally formed with the ground conductor. For this reason, when, for example, a ground conductor is punched out from a metal plate, the ground terminal portion protrudes, resulting in a large portion of the metal plate being wasted. Furthermore, depending on the device using the cathode ray tube, the position of the ground terminal of the cathode ray tube socket is different. Accordingly, grounding terminals derived from different positions on the grounding conductor were used, and it was necessary to prepare many types of grounding conductors.

The purpose of this invention is to provide a socket for a cathode ray tube that can make effective use of the material used to obtain the ground conductor and that can lead out the ground terminals from different positions using the same ground conductor. .

"Means for Solving the Problem" According to this invention, contacts are accommodated in all but one of the contact accommodating sections formed in the body, and a ground terminal is provided in the contact accommodating section where no contact is accommodated. is housed, and its ground terminal is resiliently contacted with the ground conductor.

``Example'' Hereinafter, an example of the cathode ray tube socket according to this invention will be described with reference to the drawings. Figures 1 to 4
As shown in the figure, a body 11 made of an insulating material is composed of a main body 12 into which a terminal pin of a mating cathode ray tube is inserted, and a high-pressure discharge chamber 13 integrally provided on the side thereof. The body main body 12 has a substantially thick disk shape, and a circular hole 15 centered on the center line 14 is formed through the body main body 12. center line 1
A plurality of terminal pin insertion holes 16 into which terminal pins of a cathode ray tube are inserted are formed at equal intervals on a circle centered on point 4. Contact accommodating portions 17 (FIG. 4) are formed in communication with these terminal pin insertion holes 16 and extending to the back surface of the body 11, respectively. A contact main body 18 is housed in each contact housing part 17, except for at least one, close to the terminal pin insertion hole 16 side.
Each contact accommodating portion 17 is enlarged outwardly with respect to the center line 14 behind the contact body 18 to form an enlarged portion 19 . Further, an engaging recess 21 is formed on the inner wall surface of the contact accommodating portion 17 on the outside with respect to the center line 14 of the contact body 18 in communication with the inner wall surface of the contact housing portion 17 . In the figure, the front side of the engagement recess 21 is an open surface that reaches the front surface of the body 11. An inner wall surface on the rear side of the engagement recess 21 is an engagement surface 22 . In this illustrated example, the contact accommodating portion 1 at the end of the arrangement of the contact accommodating portions 17
7 is a case where the contact main body 18 is not accommodated.

Center line 1 of enlarged portion 19 of contact accommodating portion 17
As shown in FIGS. 3 and 4, positioning grooves 23a and 23b are formed on both side edges of the inner wall surface 19a (FIG. 6) on the outside of the body 11 so as to extend in the front-back direction of the body 11, respectively. Further, discharge chamber holes 25 are formed between these positioning grooves 23a and 23b, and the discharge chamber holes 25 reach the outer peripheral surface of the body 11 in the figure. The outer diameter of the body main body 12 is made small on the front side of the discharge chamber hole 25, and the front side of the discharge chamber hole 25 communicates with the outside as shown in FIG. Each discharge chamber hole 2
Positioning grooves 26a and 26b (FIGS. 5 and 6) are formed facing each other on both inner wall surfaces of 5 and extending in the front-rear direction.

In other words, the positioning grooves 23a, 23b are formed approximately on one circle centered on the center line 14, and the positioning grooves 26a, 26b are formed approximately on one concentric circle outside the circle. ing.

The contacts 28 respectively accommodated in the contact accommodating portions 17 are made by bending a metal plate, for example, as shown in FIGS. It is configured by being bent, and the surface opposite to the center line 14 is the surface facing the abutting edge of the cylindrical bend,
This surface is a flat side plate 18a, and the side plate 18a is in contact with the wall surface of the contact accommodating portion 17, and a small engagement protrusion 29 extending diagonally backward and outward is cut out from the side plate 18a and integrally protrudes. The small engagement protrusion 29 protrudes into the engagement recess 21 and its rear end is connected to the engagement surface 2.
2 to prevent the contact 28 from coming off.

The middle of the contact body 18 in the front and back direction is the side plate 1.
All but 8a are extruded inward to form a contact portion 31 that elastically contacts the terminal pin inserted through the insertion hole 16. As shown in FIGS. 3 and 11, the front end of the side plate 18a fits between the protrusion 91 and the wall surface on the side of the recess 21, so that the contact body 18 is stably held against insertion and removal of the cathode ray tube terminal pin. ing.

The rear end of the side plate 18a of the contact body 18 is slightly extended rearward, and then bent and extended laterally outward along the front inner wall surface of the enlarged part 19 of the contact accommodating part 17. The small protrusion 29 narrows the space between the engagement surface 22 and the front inner wall surface of the enlarged portion 19, and the contact body 18 is fixed to the body 11 in the front-rear direction, and is stably held against insertion and removal of the terminal pin. be done. Lateral extension 3
The outer end of the electrode part 2 is bent and extended rearward along the outer inner wall surface of the enlarged part 19 to form an electrode part 33, and the rear end of the electrode 33 is bent outward with respect to the center line 14 along the back surface of the body 11. It is bent and extended to form an outer extension 34, and the extended end of the outer extension 34 is bent and extended rearward again to form a terminal 35 integrally.

Both sides of the electrode part 33 are slightly enlarged on both sides in the width direction, and are bent and extended obliquely to the center line 14 side with respect to the plate surface of the electrode part 33, and have engaging edges 36a, 36b.
It is said that The engaging edges 36a and 36b have an inclined edge on the front side so that they can be easily inserted into the positioning groove. The engaging edges 36a and 36b are press-fitted into the positioning grooves 23a and 23b from the back side of the body 11, respectively, so that the electrode portion 33 closes the end surface of the discharge hole 5 on the center line 14 side. As shown in FIGS. 3 and 4, the outer extension portion 34 of the contact 28 is substantially fitted into a recess 39 that is radial to the center line 14 formed on the back surface of the main body 12.

As shown in FIGS. 1, 2, and 8, a ground conductor 41 is provided on the outer peripheral surface of the main body 12 and is bent in an arc shape along the outer peripheral surface of the body main body 12. The ground conductor 41 is a strip-shaped conductor bent into an arc shape so that its width direction is parallel to the center line 14, and a plurality of electrode pieces 42 integrally extend rearward from its rear edge. Both side edges of each electrode piece 42 are extended in the width direction of the electrode piece 42 to form engaging edges 43a, 43b.
4, and the distance between the engaging edges 43a, 43b becomes smaller as the protruding end of the electrode piece 42 is approached. The engaging edges 43a and 43b are press-fitted from the front side into the positioning grooves 26a and 26b of the body main body 12, respectively, to determine the position of the electrode piece 42, and as shown in FIG. = Chamber hole 25
The outer surface with respect to the centerline 14 of is closed. In the figure, the protruding end of the electrode piece 42 is inserted and fitted into a groove 45 formed on the rear inner wall surface of the discharge chamber hole 25.

On the opposite side of the ground conductor 41 from each electrode piece 42, that is, on the front edge side of the ground conductor 41, a dust-proof piece 46 is integrally projected and extended, and the dust-proof piece 46 is bent and extended toward the center line 14 to form a discharge chamber. The front side of the use hole 25 is closed. The outer diameter of the body main body 12 is made smaller slightly in front of the open surface on the front side of the discharge chamber hole 25, and a step formed by the difference in diameter has a step with respect to the center line 14 of the outer periphery of the body main body 12. , a shallow radial recess 47 is formed, and a dustproof piece 46 is fitted into the recess 47. Electrode part 33, electrode piece 4
2. Dust-proof piece 46 and discharge chamber hole 2 between them
5 and the inner wall surface constituting the discharge chamber 25'.
is configured. A discharge cavity is formed between the electrode part 33 and the electrode piece 42, but in the figure, a hemispherical electrode 48 is projected from the electrode piece 42 toward the electrode part 33, and the gap between the electrode 48 and the electrode part 33 is Discharge space between 〓4
9 are configured. Electrode piece 4 of ground conductor 41
2. The part from which the dustproof piece 46 protrudes is substantially flat, and therefore the ground conductor 41 is bent into a substantially polygonal shape.

In this invention, a grounding terminal 51 is accommodated and held in one of the contact accommodating portions 17 that does not accommodate any contacts, as shown in FIG. 3, and the grounding terminal 51 is in elastic contact with the grounding conductor 41. There is. For example, as shown in FIG. 12, the ground terminal 51 is connected to the contact body 1 of the contact 28 in FIG.
8 is removed and a tongue piece 52 is cut and raised as a protruding part on the electrode part 33. The tongue piece 52 is cut and raised on the terminal body 53 side, and the tongue piece 52
The base (connecting portion) of is located on the opposite side from the terminal main body 53.

The grounding terminal 51 is held in the body 11 by inserting its engaging edges into the positioning grooves 23a and 23b from the back side of the body 11 in the same way as the contact 28 is accommodated. At that time, in this example, the tongue piece 52 is connected to the electrode 48 of the ground conductor 41 as shown in FIG.
The ground conductor 41 is in elastic contact with the ground terminal 51
electrically connected to.

As shown in FIG. 14, the ground terminal 51 may have a structure in which a tongue piece 52 is cut and raised from the electrode portion 33 of the contact 28.

"Effect of the invention" As stated above, according to this invention, the ground terminal 5
1 elastically contact the ground conductor 41 and are electrically connected to each other. Therefore, it is not necessary to provide the grounding terminal 51 integrally with the grounding conductor 41, and therefore, when manufacturing a large number of grounding conductors 41 from a metal plate by punching, the metal plate can be used effectively, and the material cost can be reduced accordingly. I can do it. Furthermore, it is possible to arbitrarily select the contact accommodating portion for accommodating the grounding terminal 51 depending on the device in which the cathode ray tube is used.In other words, the position of the grounding terminal can be freely determined, and the same grounding conductor 41 can be used. be able to.

Further, according to the embodiment, the electrode portion 33 of the contact 28 is press-fitted into the positioning grooves 23a, 23b of the body and positioned, and a discharge space 49 is formed between the positioned electrode portion 33 and the electrode piece 42. However, each electrode piece 42 is also press-fitted into the positioning grooves 26, 27 of the body and positioned.
The body 11 is made as a molded product of synthetic resin material, and the dimensions of each part can be made with fairly high precision. Therefore, the spacing between the electrode portions 33 and the electrode pieces 42 can be made with high precision. can.
Therefore, the accuracy of the length of the discharge space 49 is also high. Each electrode piece 42 of this grounding conductor 41 is positioned independently in this way, and in addition, as shown in the figure, it is only necessary to press-fit from the front, and the contact 28 can also be press-fit from the rear in the same way, simplifying the assembly work. . In addition, the body is not made by combining two pieces at the front and back, and there is no need to construct the discharge chamber 25' inside the body itself, and it is a single body.
3. The electrode piece 42 and the dustproof piece 46 close off the discharge chamber 25' from the outside, so there is no risk of dust entering the discharge chamber 25' and reducing reliability.
Moreover, this sealed discharge chamber 25' also has contact 2.
8. Automatically configured by press-fitting and assembling the electrode piece 42. When using a structure in which a band-shaped conductor is bent around the center line 14 as the ground conductor 41 as in this example, compared to the case where a plate ring-shaped ground conductor is used in which the width direction of the ground conductor is perpendicular to the center line 14. Therefore, the material for making the ground conductor and the electrode piece can be used effectively, and the outer diameter of the socket can be made small. The contact 28 may be of a so-called bihawket type.

The configuration of the discharge space by the electrode part 33 and the electrode piece 42 is such that the electrode part 33 and the electrode piece 42 are connected to the body main body 1.
2, the electrode part 33 and the electrode piece 42 face each other, and a discharge space of a predetermined length is formed between them. It is only necessary that the inner surface of the chamber hole 25 constitute a discharge chamber that is closed to the outside, and the dustproof piece 46 does not necessarily need to be provided.

As in the above example, the hemispherical electrode body 4 is attached to the electrode piece 42.
8 and press-fit the electrode piece 42 into the body main body 12 in a direction perpendicular to the protruding direction, a passage of the electrode body 48 is required, and the passage is connected to the dust-proof piece 4.
It will be closed with 6. However, when the electrode piece 42 is press-fitted and fixed to the body main body 12 from the protruding direction of the electrode main body 48, the dustproof piece 46 can be omitted. In addition, the hemispherical electrode body has an electrode portion 33 as shown by the dotted line in FIG.
It may be formed into In this case, the electrode body 48 of the electrode piece 42 may be omitted and the electrode body 48 may be made flat. If omitted, the dustproof piece 46 can be omitted, and it is necessary to form a passage for the electrode body when press-fitting the electrode part 33 into the body. However, in the example shown in FIG. 7, the passage can be closed by the outer extension 34, and in this case, the outer extension 34 can be said to constitute a dustproof piece.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a cathode ray tube socket according to this invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a bottom view of Fig. 1, and Fig. 4 is a sectional view of Fig. 2. Fig. 5 is a plan view of the body 11, and Fig. 6 is a plan view of the body 11.
FIG. 7 is a perspective view of the contact 28, FIG. 8 is a perspective view of a part of the grounding conductor 41, FIG. 9 is a perspective view of a part of the body, and FIG.
Figure 0 is a sectional view taken along the line 3-3 in Figure 9, Figure 11 is an enlarged sectional view of the vicinity of the contact body 18, Figure 12 is a perspective view showing an example of a grounding terminal, and Figure 13 is a diagram showing a grounding terminal and a grounding conductor. FIG. 14 is a side view showing the contact state of the ground terminal, and FIG. 14 is a perspective view showing another example of the ground terminal.

Claims (1)

[Scope of claim for utility model registration] 1 within the body of the insulating material centered on its center line
A plurality of contact accommodating portions are formed at equal intervals on a circle, and except for one of these contact accommodating portions, a contact body and an electrode portion, each of which is in elastic contact with a terminal pin of a cathode ray tube, are formed in the accommodating portion. A grounding conductor having a substantially circular arc shape centered on the center line is attached to the body, facing each electrode part of the contact array, and the grounding conductor and the electrode part of the contact are attached to the body. A discharge space is formed between the contacts, and a grounding terminal having a portion corresponding to the electrode portion of the contact is accommodated in one of the contact accommodating portions in which the contact is not accommodated, and the electrode portion of the grounding terminal is A socket for a cathode ray tube, wherein a protrusion provided at a portion corresponding to the ground conductor is in elastic contact with the ground conductor.