JPH0336063Y2 - - 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 an arc-shaped grounding conductor is arranged opposite to the contact arrangement, and a discharge space is formed between these grounding conductors and the contacts. Ta.

In this conventional cathode ray tube socket, for example, the one shown in British Patent No. 1380401 (issued in 1975), a contact and a ground conductor are attached to one body. There was a problem with the accuracy of the discharge space formed. In other words, since the terminal pin of the cathode ray tube is brought into elastic contact with the contact, the contact is displaced when the terminal pin is inserted or removed, which changes the size of the discharge air space formed between it and the ground conductor. I was afraid. Therefore, for example,
As shown in Publication No. 14103 and Publication No. 55-42395, the contact is sandwiched between the front body and the rear body, or, for example,
As shown in Japanese Patent No. 86682, it was necessary to fix the electrode pieces forming the discharge space with separately formed insulating holding members to form a unit, and then to incorporate it into the body. That is, it is necessary to use a plurality of bodies or to unitize the discharge chamber with a separate holding member, which poses a problem in providing a compact cathode ray tube socket that can be easily mass-produced.

The purpose of this invention is to form a discharge space between the contact and the ground conductor by fitting and holding the contact in the contact housing part of the body, and also to prevent the terminal pin of the cathode ray tube from coming into elastic contact with the contact. The purpose of the present invention is to provide a cathode ray tube socket that maintains the accuracy of the discharge space, is small, and is excellent in mass production.

"Means for Solving the Problem" According to this invention, a plurality of contact accommodating portions are provided in an insulator body at intervals from each other on a circle centered on its center line from the back surface to the front surface of the body. A grounding conductor is attached to the body, and the grounding conductor is formed toward the direction and has a substantially arc shape around the center line on the outside of the contact accommodating portion, and the back side of the body of the contact accommodating portion is connected to the grounding conductor. It is expanded outward with respect to the center line of the body so that the inner surface of the conductor is exposed, and is located along the longitudinal direction of the ground conductor at a position on the back side of the body of the contact accommodating portion and close to the ground conductor. Positioning grooves are formed in the inner wall surfaces facing each other from the back surface of the body toward the front surface, and the contact housing portion has a contact body and an electrode portion that are elastically contacted by the terminal pins of the cathode ray tube. The contact body of the contact is housed on the front side of the body in the contact housing part, and the protrusion provided on the surface of the contact body opposite to the center line of the body is located in the contact body. is engaged with an engaging recess formed on the inner wall surface of the contact accommodating portion on the outside with respect to the center line of the body, and both sides of the electrode portion of the contact are fitted and held in the positioning groove. As a result, a discharge space is formed between the electrode portion and 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 terminal pins of a mating cathode ray tube are inserted, and a high-pressure discharge chamber 13 integrally provided on the side thereof. The body main body 12 has a thick substantially 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. Close to the terminal pin insertion hole 16 side,
Each contact housing 14 except at least one
A contact body 18 is housed within each of the contact bodies. Each contact accommodating portion 17 is connected to the contact body 1
8 are enlarged outwardly with respect to the center line 14 to form enlarged portions 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 and communicating therewith. In the figure, the engagement recess 21
The front side of the body 11 is an open surface that reaches the front side of the body 11.

The rear inner wall surface of this engagement recess 21 is the engagement surface 2.
It is said to be 2. In this illustrated example, the contact body 18 is not accommodated in the contact accommodating section 17 at the end of the arrangement of the contact accommodating sections 17.

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 to extend in the front-rear direction. Also, these positioning grooves 2
A discharge chamber hole 25 is formed between 3a and 23b, and in the figure, the discharge chamber hole 25 is formed in the body 1.
It has reached the outer peripheral surface of 1. This discharge chamber hole 2
The outer diameter of the main body 12 is made small on the front side of the discharge chamber 5, and the discharge chamber hole 25 is communicated with the outside as shown in FIG. Each discharge chamber hole 25
Positioning grooves 26a and 26b (FIGS. 5 and 6) are formed facing each other and extending in the front-rear direction on both inner wall surfaces of the holder.

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 accommodated in each of the contact accommodating portions 17 are made by bending a single metal plate, for example, as shown in FIGS. 4 and 7, and the contact body 18 has one end of the metal plate approximately It is bent into a cylindrical shape, and the surface opposite to the center line 14 is the surface facing the abutting edge of the cylindrical bend, and this surface is a flat side plate 18a, and the side plate 1
8a is in contact with the wall surface of the contact accommodating portion 17,
A small engaging protrusion 29 extending diagonally backward and outward is connected to the side plate 1.
The small engagement protrusion 29 projects into the engagement recess 21 and its rear end engages with the engagement surface 22 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 is fitted between the protrusion 91 and the wall surface on the 21 side of the recess, so that the contact body 1
8 is stably held against insertion and removal of the cathode ray tube terminal pin.

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 26 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 rear direction, making it stable against insertion and removal of the terminal pin. Retained. 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 part 33 is extended 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 again bent and extended rearward 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 front side has an inclined edge so that the engaging edges 36a and 36b 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 chamber hole 25 on the center line 14 side. Furthermore, contact 2
The outer extension 34 of 8 is aligned with the center line 1 formed on the back surface of the main body 12 as shown in FIGS. 3 and 4.
4 and is substantially fitted into a radial recess 39.

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 they approach the protruding end of the electrode piece 42. 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. In other words, the electrode piece 4 of the ground conductor 41
The rear part of the contact accommodating part 17 is enlarged outwardly by the enlarged part 19 and the discharge chamber hole 25 so that the inner surface of the contact accommodating part 2 is exposed.

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 side to form a discharge chamber. The front side of the 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 the outer diameter of the body main body 12 is made smaller with respect to the center line 14 at the stepped portion formed by the diameter difference. A shallow recess 47 is formed in a radial manner, and a dustproof piece 56 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 space is formed between the electrode part 33 and the electrode piece 42, but in the figure, a hemispherical electrode 48 protrudes from the electrode piece 42 toward the electrode part 33, and a discharge space is formed between the electrode part 33 and the electrode part 33. Discharge sky = 49
is configured. electrode piece 42 of the ground conductor 41;
The portion 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 on the electrode part 33. The tongue piece 52 is the terminal body 53
The tongue piece 52 is cut and raised on the side, and the base (connection part) of the tongue piece 52 is on the opposite side from the terminal body 53. The ground terminal 51 is held in the body 11 by inserting its engaging edges into the positioning grooves 23a, 23b from the back side of the body 11 in the same way as the contact 28 is accommodated.

At this time, in this example, as shown in FIG.
2 elastically contacts the electrode 48 of the ground conductor 41, and the ground conductor 41 is electrically connected to the ground terminal 51.

As shown in FIG. 14, the grounding 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.Furthermore, a tongue piece may be integrally provided on the grounding conductor 41 side. It may be brought into elastic contact with the ground terminal 51. In this case, the ground terminal is provided with a hemispherical protrusion that comes into contact with the tongue of the ground conductor 41, if necessary.

"Effect of the invention" As described above, according to this invention, the contact 28 is inserted into the contact accommodating part 17, and both sides of the electrode part 33 are fitted and held in the positioning grooves 23a and 23b of the contact accommodating part 17. As a result, a discharge air space is created between the electrode section 33 and the ground conductor 41.
As described in the prior art section, there is no need to sandwich the contacts between multiple bodies or to unitize the discharge chamber with a separately formed holding member, making it compact and easy to mass-produce. An excellent cathode ray tube socket can be provided. Moreover,
A protrusion 29 provided on the surface of the contact body 18 opposite to the center line 14 of the body 11 is connected to an engagement recess 2 formed on the inner wall surface of the contact accommodating portion 17 outside the center line 14 of the contact body 18.
1, and both engaging edges 36a and 36b of the electrode portion 33 are fitted and held in the positioning grooves 23a and 23b of the contact housing portion 17, so that the terminal pin of the cathode ray tube is elastically attached to the contact body 15. Even if the electrode portion 33 and the ground conductor 41 come into contact with each other, the accuracy of the discharge space formed between the electrode portion 33 and the ground conductor 41 is reliably maintained. Therefore, it is small and has excellent mass productivity, and
It is possible to provide a cathode ray tube socket in which the accuracy of the discharge space can be reliably maintained even when the terminal pins are inserted and removed.

As described in the embodiment, the grounding terminal 51 shown in FIG. 12 or 14 is fitted and held in one of the contact accommodating portions 17, and the grounding terminal 51 and the grounding conductor 41 are connected from the grounding terminal. If the contact is made using the protruding tongue piece, there is no need to provide a grounding terminal integrally with the grounding conductor 41, and therefore, when a large number of grounding conductors 41 are punched out from a metal plate, the metal plate can be effectively used. This can reduce material costs accordingly. Furthermore, the contact accommodating portion that accommodates the ground terminal 51 can be appropriately selected depending on the device in which the cathode ray tube is used.In other words, the position of the ground terminal can be freely determined, and the same ground conductor 41 and body 1 can be used. Therefore, the ground terminal can be led out from different positions, which is useful in mass producing cathode ray tube sockets with different specifications.

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. materials for making grounding conductors and electrode pieces can be used effectively.
Moreover, 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 portion 33 and the electrode piece 42 face each other, and a discharge cavity of a predetermined length is formed between them. It is only necessary that the inner surface of the dampening 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 flat. If the electrode body 48 is 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 the drawing]

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 utility model registration request] A plurality of contact accommodating portions are formed in the body of the insulator at intervals from each other on a circle centered on the center line thereof, and extend from the back side of the body toward the front side. A grounding conductor having a substantially circular arc shape centered on the wire is attached to the body, and the back side of the body of the contact accommodating portion is oriented outward with respect to the center line of the body so that the inner surface of the grounding conductor is exposed. The inner wall surface of the contact accommodating portion, located on the back side of the body and located close to the ground conductor, facing the longitudinal direction of the ground conductor, has a wall extending from the back surface of the body toward the surface. Positioning grooves are respectively formed in the contact accommodating portion, and a contact having a contact body and an electrode portion with which a terminal pin of a cathode ray tube is elastically contacted is accommodated in the contact accommodating portion, and the contact body of the contact is inserted into the contact accommodating portion. A protrusion housed in the front side of the body of the contact body and provided on a surface of the contact body opposite to the center line of the body is located inside the contact accommodating portion on the outside with respect to the center line of the body of the contact body. It is locked in the engagement recess formed in the wall surface, and both sides of the electrode part of the contact are fitted and held in the positioning groove, thereby creating a discharge air between the electrode part and the ground conductor. A cathode ray tube socket with a .