JPS5821106Y2 - Cathode ray tube socket with discharge gap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention particularly relates to a socket for a cathode ray tube, which is provided with a discharge gap that provides a protective effect by reducing excessive voltage to earth by discharge.

In order to protect the focus electrode of the cathode ray tube against overvoltage, the discharge gap for overvoltage protection against the contact to be brought into contact with the focus electrode terminal pin of the cathode ray tube socket has in particular been provided separately.

A fork-type terminal was used to connect the focus contact and the lead wire, and the terminal of the protective discharge gap forming part was connected by soldering.

These lead wires, contacts, and electrodes must be connected all at once, making the work extremely difficult and the shape of the contacts complicated. Terminals are said to be flexible, but they still sometimes break due to excessive force.

This idea proposes a cathode ray tube socket with a discharge gap that is particularly suitable for application to high-voltage contacts and their protective discharge gap parts, and provides a discharge gap with stable discharge characteristics.
In addition, the present invention provides a cathode ray tube socket in which the connection between the contact and the terminal of the discharge gap electrode is easy, there is no risk of the terminal breaking, the terminal does not require particular flexibility, and the soldering work for connection is easy. It is something to do.

Next, an embodiment of the cathode ray tube socket with a discharge gap according to this invention will be described with reference to the drawings.

A front body 13 and a rear body 14 are formed by dividing a substantially cylindrical body 11 with a short axis in the direction of its axis 12.
It is composed of

A cylindrical portion 15 extending in the axial direction from the inner peripheral surface on the rear side of the front body 13 is fitted and inserted into the inner peripheral surface of the rear body 14.

A plurality of contact accommodating portions 16 are formed in the front body near the inner circumferential surface of the front body 13 at approximately equal angular intervals around the axis 12 .

Contacts 17 to be brought into contact with the terminal pins of the cathode ray tube are accommodated in these contact accommodating portions 16, respectively.

Except for the focus contact l-17f, the other contacts 17 are integrally formed with a contact extension part 18 extending radially outward with respect to the axis 12 on the back side of the cylindrical part of the contact body. The portion 18 passes between the front body 13 and the rear body 14 and is bent and extended rearward to form a terminal 19 so as to pass through a groove formed along the axial direction on the outer peripheral surface of the rear body 14.

A boss 21 is integrally projected rearward on the back surface of the front body 13 between adjacent contact extensions 18;
The boss 21 is inserted into a through hole formed corresponding to the back body 14, and its protruding end is heated and melted and expanded to mechanically connect the front body 13 and the back body 14.

A protective discharge gap forming portion 22 is provided corresponding to the contact 17 to ground the excessive voltage applied to the contact 17 .

For example, an accommodation hole 23 for accommodating the discharge gap forming portion 22 is provided outside the arrangement circle of the contacts 17 and in the field of the coaxial core.

An electrode fixing mold body 24 is housed in this housing part 23, and the mold body 24 has a frame shape.

A pair of electrodes 25 and 26 protrude from the mold body 24 within the frame.

A discharge gap 27 is formed between the protruding opposing ends of the electrodes 25 and 26 .

One electrode 26 projects outward from the molded body 24 and serves as a terminal 28, and the terminal 28 is overlapped with the terminal 19 of the corresponding contact 17 and connected to each other.

This discharge gap forming portion 22 is, for example,
Although the detailed explanation will be omitted, the discharge gap forming portions corresponding to these contacts can be connected to each other.

As shown in FIG. 5 when expanded around the axis 12, the electrode 25 on the side from which the terminal 28 is not led out has the molded body 24,
Connecting arm 2 penetrating at right angles to the electrode 25, 260 arrangement direction
9 within the mold frame 24.

A plurality of mold frames 24 are connected to this connecting arm 29.

One end of the connecting arm 29 is bent at a right angle within the molded body 31 to form a ground terminal 32 substantially parallel to the terminal 28.

Therefore, when an overvoltage of more than a predetermined value occurs in the contact 17, the discharge gap 27 discharges, and the excessive voltage is transmitted from the terminal 28 to the discharge gap 27° electrode 25. Connect to the ground by passing through the connecting arm 29 and the grounding terminal 32 in this order.

It is possible to form a ring-shaped groove 33 open on the front surface of the front body 13 between the arrangement circle of the contacts 17 and the arrangement circle of the discharge gap forming portion 27.

Further, a groove 34 is formed on the front side of the front body 13 so as to surround the focus contact 17f and reach the inner peripheral surface of the front body 13.

A focus discharge gap housing portion 35 is attached to the body 11 on the outside when looking at the axis 12 with respect to the focus contactor 17f.
is provided.

An electrode holding insulator 3 is placed inside the focus discharge gap accommodating part 35.
6 will be accommodated.

A pair of electrodes 37 are provided on the electrode holding insulator 36, facing each other.
．． 38 are held, and a discharge gap 39 is formed between these electrodes 37 and 38.

The electrode holding insulator 36 has a square cylindrical shape, and electrodes 37 and 38 are held on opposite side walls thereof.

These electrodes 37 and 38 have a hemispherical shape, and a flange is integrally formed on the outer periphery of the hemispherical periphery, and the flange is embedded in the insulator 36, so that the electrodes 37 and 38 are made of an insulator. It is held at 36.

Terminals 41 and 42 are integrally extended outward from the edges of the flanges of these electrodes 37 and 38, respectively, and protrude to the outside.

On the protruding side of one terminal 41, a positioning recess 43 is integrally formed along the side wall of the insulator 36 and extends in a direction perpendicular to the axis of the square prism of the insulator 36.

A hole is made in the center of the positioning recess 43, and the electrode 41 is folded back at the position of the hole to form the positioning recess 4.
It stands out within 3.

On the other hand, a focus contact 1 is provided in the positioning recess 43.
7f of contact extensions 18f are fitted.

That is, the extension part 18f is extended outwardly relative to the line connecting the contact 17f and the shaft center 12 when viewed from the front, and is folded back in a U-shape at the groove 34 position to avoid this. It is inserted into the focus discharge gap accommodating part 35.

The extension portion 18f is further extended along the inside of the recess 43 and fitted into the recess 43, and protrudes from this to the outside of the terminal 1.
It is considered to be 9f.

In order to allow the bent end of the electrode 41 to be inserted into the recess 43, pieces 44 and 45 are cut and bent in opposite directions from one place in the middle part of the extension part 18f. 44
, 45, the end of the electrode 41 is inserted between them to contact them, and solder 46 is applied to connect the terminal 41 and the extension part 18f.
are connected to each other.

The other terminal 42 is bent rearward and extended to protrude to the outside.

This terminal 42 is used as a ground terminal.

A cover 47 for the focus terminal 19f is attached to the back side of the body 11 on the outside with respect to the axis 12.

On the inner surface of the insulator 36, on which the electrodes 37, 38 do not protrude, a pair of protrusions 48.
49 are integrally formed, and the electrodes 37.3 are formed by these protrusions.
The surface distance between the electrodes 37 and 38 is increased to improve the insulation between the electrodes 37 and 38.

In order to stably hold the electrode holding insulator 36 within the body 11, a positioning convex portion 51 is integrally formed on the inner surface of the front body 35 to fit and be inserted into the outer peripheral surface of the insulator 36. 14 is integrally formed with a positioning convex portion 52 that is inserted and fitted into the insulator 36.

As described above, according to the cathode ray tube socket of this invention, the extension part 18f of the focus contact is positioned in the recess of the electrode holding insulator 36, especially in the focus discharge gap forming part, and in this state, the electrode terminal They come into contact with or come close to each other and maintain their positions.

Therefore, the two can be easily connected using solder 46 to that part.

Therefore, there is no need to use flexible terminals,
There is no risk of the terminal breaking.

The electrode holding insulator 36 holds the electrodes 37, 38 to determine the gap, positions the extension of the contact in the recess 43, and uses the protrusions 48, 49 to hold the electrodes 37, 38.
Let the surface distance between be dogs.

Furthermore, the insulator 36 is positioned by the rectangular tube body and the convex portions 51 and 52, and has many functions.

Furthermore, since the electrodes 37 and 38 are held within the square cylindrical insulator 36, even if they are assembled externally and come into contact with an external object before being assembled into the body 11, there is no risk of direct contact with the electrodes 37 and 38. The distance between the electrodes 37 and 38 must be maintained correctly.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a cathode ray tube socket according to this invention, FIG. 2 is a cross-sectional view taken along lines A, B, and C, and FIG. 3 is a partially cutaway view of the cover 47 for the focus terminal shown in FIG. Figure 4 is a cross-sectional view taken along the line D-D in Figure 1, Figure 5 is a rear view.
The figure is a developed view of the focus discharge gap forming section. 11: body, 16: contact accommodating part, 17: contact, 17f: contact for focus, 19: terminal,
22: Contact discharge gap forming part. 24: Frame-shaped mold body, 25, 26 two electrodes, 27: Discharge gap, 28: Terminal, 35: Discharge gap housing part for focusing,
36: Electrode holding insulator, 37, 38: Electrode, 41, 4
2: Terminal, 43: Four positioning parts, 46: Solder.

Claims (1)

[Claims for Utility Model Registration] In a cathode ray tube socket in which a plurality of contacts are housed in a body made of an insulating material, a high-voltage discharge gap housing section is provided in one side of the body, and a high-voltage discharge gap housing section is provided within the high-voltage discharge gap housing section. An electrode holding insulator is housed, and the electrode holding insulator has a rectangular cylindrical shape parallel to the axis of the body, and a pair of electrodes are held facing each other on the inner surfaces of the opposing side walls,
A discharge gap is formed between these electrodes, and the terminals of these electrodes respectively protrude from the electrode holding insulator. A positioning recess extending along the outer surface of one electrode holding side wall of the electrode holding insulator and perpendicular to the axis of the insulator is integrally formed, and one terminal of the contact is placed in the recess. The fitted terminal portion and the protruding electrode terminal are connected to each other within the recess, and the axis thereof is connected to the other opposing inner wall of the square tube of the electrode holding insulator. ridges parallel to each other are formed integrally,
A cathode ray tube socket with a discharge gap, wherein both ends of the rectangular tube of the electrode holding insulator are fitted into and positioned in the body of the high voltage discharge gap accommodation section.