JPS647558Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cathode ray tube device in which a cathode ray tube is connected to an external lead wire for supplying direct current voltage, signal voltage, etc. By adopting a new and improved configuration of the external lead wire connection section where the wire is connected, the stem pin and the external lead wire can be connected securely and each stem pin can be connected securely even when used under harsh ambient conditions. This invention proposes a cathode ray tube device that can maintain reliable insulation between pins, etc.

When a cathode ray tube is used, external lead wires for supplying heater voltage, grid voltage, display signal voltage, etc. to the cathode ray tube are connected to a plurality of stem pins installed in the stem portion of the cathode ray tube. . Conventionally, the connection between the stem pin and the external lead wire has been made using a socket that fits into the stem pin. That is, a socket that fits into the plurality of stem pins of the cathode ray tube is prepared in advance, each external lead wire is connected to this socket by soldering, etc., and then the socket is fitted to the stem pin of the cathode ray tube. , the stem pin and the external lead wire are connected. However, conventional cathode ray tube devices that use such sockets to connect stem pins and external lead wires,
For example, when the ambient conditions are relatively harsh, such as when used onboard an aircraft for displaying instruments, the mechanical strength and dielectric strength of the connection between the stem pin and the external lead wire may be insufficient. If there is a shortage, the connection between the stem pin and the external lead wire may become unreliable, or an electric discharge may occur between the stem pins.

Therefore, the present invention provides a cathode ray tube device that improves the structure of the part that connects the stem pin and the external lead wire, thereby making the connection between the stem pin and the external lead wire and the insulation between the stem pins more reliable. The present invention is intended to solve the disadvantages associated with conventional cathode ray tube devices. Hereinafter, a cathode ray tube device according to the present invention will be explained with reference to the drawings.

FIG. 1 shows an example of a cathode ray tube device according to the present invention exploded into its main components. 1 is a cathode ray tube;
2 is its stem portion. A plurality of stem pins 3 are installed in the stem portion 2 and are connected to each electrode in the tube, a cathode heater, etc. 4 is an external lead wire 6 having an insulation coating 5 on each stem pin 3;
It is a connecting member formed of a conductor for connecting the cylindrical parts, and has two cylindrical parts, into which the tip of the external lead wire 6 is inserted, and the other part fits into the stem pin 3. This connecting member 4 is arranged for each stem pin 3, and there are usually a plurality of external lead wires 6, which are connected to each stem pin. In the figure, only one connection member 4 and one external lead wire 6 are shown, and the others are omitted. Reference numeral 7 denotes a stem cover base, which is formed into an annular body as a whole, so that the stem pin 3 to which the external lead wire 6 is connected with the connecting member 4 is housed inside the ring.
One end surface portion 8 is placed in contact with the stem portion 2 . This stem cover base 7 has a position regulating part for the connecting member 4 inside its ring, and has an external lead wire 6.
is led out through the ring of this annular stem cover base 7. 10 is a stem cover lid body;
It is formed into a plate shape as a whole, and is fitted onto the other end surface 9 of the stem cover base 7 and attached by screwing or adhesive. A lead wire guide portion 11 is formed in this stem cover lid 10, and when the stem cover lid 10 is attached to the stem cover base 7, the external lead wire 6 is guided to this lead wire guide portion 11. engaged and derived. Such a stem cover base body 7 and a stem cover lid body 10 are arranged on the stem portion 2 of the cathode ray tube 1, and the space surrounded by these is filled with insulating resin such as silicone resin. .

Next, the above-mentioned connecting member 4, stem cover base 7
Each of the stem/cover lid body 10 will be explained in more detail. FIG. 2 shows the specific structure of the connecting member 4. In this example, an elastic plate made of a metal material such as phosphor bronze is bent into an S-shape. When one plate is bent into an S-shape in this way, two cylindrical parts 12 and 13 are formed, and the tip of the external lead wire 6 is inserted into one of the cylindrical parts 12 and soldered. It is fixed by attaching or caulking. Further, the other cylindrical portion 13 fits into the stem pin 3. At this time, the inner diameter of the cylindrical portion 13 before fitting is adjusted so that the stem pin 3 inserted therein is held by the cylindrical portion 13 by utilizing its elasticity.
It is preferable that the diameter be slightly smaller than the outer diameter of the pin 3. Furthermore, the inside of the cylindrical portion 13 may be caulked after being fitted onto the stem pin 3. FIG. 3 shows the specific structure of the stem cover base 7. As shown in FIG. To explain this, the stem cover base 7 is made of an insulating material, such as a certain type of plastic, that has a heat resistance that can withstand heat of about 120°C or more, but in the illustrated example,
A portion 14 that is formed in an annular shape and has a large outer diameter and a portion 15 that has a small outer diameter are provided. The outer diameter of the larger outer diameter portion 14 is within the outer diameter of the neck portion of the cathode ray tube. An axial air venting groove 16 (described later) is formed on the outer periphery of the larger outer diameter portion 14, and the end surface 9 of the portion 14 engages with a protrusion provided on the stem cover lid 10. Mounting hole 17
is formed. A notch 18 that serves as a passage for the resin is provided in the portion facing the end surface portion 8 of the portion 15 having a small outer diameter.
is formed. A plurality of inward protrusions 19 protrude from the inner side of the ring of the stem cover base 7, by means of which the S-shaped connecting member 4 can be rotated when it is fitted onto the stem pin. A plurality of position regulating parts 20 are formed to regulate the position in order to prevent this, and each connecting member 4 is positioned in each position regulating part 20. Further, an inclined part 21 is formed on the inner side facing the end face part 9, and the stem cover lid body 1 is provided with an inclined part 21.
0 is attached, the external lead wire 6 is clamped by this inclined portion 21 and the stem/cover lid body. FIG. 4 shows the specific structure of the stem/cover lid body 10. The stem cover lid body 10 is made of the same insulating material as the stem cover base body 7, and is formed into a disk shape in the illustrated example, and has a through hole 22 for injecting an insulating resin.
is provided. This stem cover lid body 10
has an inclined wall 23 for leading out the external lead wire 6.
A plurality of lead wire guide portions 11 each having a cut groove are formed at a plurality of locations, and the stem cover base 7
An annular protrusion 25 having an inclination connected to the inclined wall 23 of the lead wire guide section 11 is formed around the through hole 22 on the side of the surface 24 that abuts the end surface 9 of the stem.
When attached to the cover base 7, the external lead wire 6 is clamped by this and the inclined portion 21 of the stem cover base 7. Furthermore, a protrusion 26 is provided on the surface 24 side to engage with a mounting hole 17 formed in the end surface portion 9 of the stem cover base body 7.

5 is a partial cross-sectional view showing an example of a cathode ray tube device according to the present invention, which is constructed using the connecting member 4, stem cover base 7, and stem cover lid 10 having the structures shown in Figs. 2, 3, and 4. An external lead wire 6 is connected to a stem pin 3 erected in a stem portion 2 of a cathode ray tube by using an S-shaped connecting member 4.
A circular stem cover base 7 is disposed surrounding the stem portion 2 with one end surface 8 thereof abutting against the stem portion 2. At this time, each connecting member 4 is positioned by a position regulating portion 20 formed on the stem cover base 7 to prevent rotation. A disk-shaped stem cover lid 10 is disposed on the other end surface 9 side of the stem cover base 7 with its surface 24 abutting against the end surface 9 and its protrusion 26 engaging with the mounting hole 17. In this state, the inclined portion 21 of the stem cover base 7 and the stem cover lid 1
The annular projection 25 of the outer lead wire 6 and the coating 5
The external lead wire 6 is clamped.
The lead wire is engaged with a lead wire guide portion 11 formed on the stem cover and led out to the outside.
Then, insulating resin 27 is injected into the space surrounded by the stem portion 2, stem cover base 7, and stem cover lid 10, and each connection member 4 and the external lead wires connected thereto are individually covered with insulating resin. Furthermore, in this example, a sealing member 28 such as polyester tape is disposed on the outer periphery of the contact portion between the stem portion 2 and the stem cover base 7, and insulating resin 27 is also injected into the space surrounded by the outer periphery of the portion 15 with a smaller outer diameter of the stem portion 2 and the stem cover base 7 and the sealing member 28, making the attachment of the stem cover base 7 to the stem portion 2 more firmly. In this case, the stem cover base 7
The insulating resin reaches from the inside of the small outer diameter portion 15 of the stem-cover base 7 to its outer periphery through the notch 18 formed in the portion of the small outer diameter portion 15 facing the end face portion 8.
Air is vented through an air vent groove 16 formed on the outer periphery of the larger diameter portion 14 of the stem-cover base 7. The insulating resin is required to have high electrical resistance, high dielectric strength, flame retardancy, good fluidity when injected, etc.
Furthermore, it is desirable for the material to have adhesive strength. Resins containing silicone resin as a main component meet these requirements.

In the cathode ray tube device according to the present invention described above, the external lead wire is connected to the stem pin using the connecting member whose position is regulated by the stem cover base. Furthermore, since the external lead wire is clamped between the stem cover base and the stem cover lid, even if the external lead wire is subjected to external tension, it will not connect to the stem pin. The connections are not affected and a reliable connection is always maintained. In addition, since the connection member that connects the stem pin and the external lead wire and the external lead wire that reaches it are individually covered with insulating resin, the dielectric strength between them is extremely high.
Accidents such as discharge will not occur even under severe ambient conditions. Furthermore, since the contact area between the stem part and the stem cover base is hardened with insulating resin, the mechanical strength of this area is high, and the connection area between the stem pin and the external lead wire is reliably protected. . Therefore, the cathode ray tube device according to the present invention can be used without any inconvenience as an instrument cathode ray tube device used under severe ambient conditions.

Note that the specific structures and shapes of the connection member for connecting the stem pin and external lead wire, the stem cover base, the stem cover lid, etc. used in the present invention are not limited to those shown in the above drawings, and may vary. Various modifications may be made within the scope of functionality.

[Brief explanation of the drawing]

FIG. 1 is an exploded view showing the main components of an example of a cathode ray tube device according to the present invention, FIGS. 2, 3, and 4.
Each figure is a perspective view showing the main components of an example of a cathode ray tube device according to the present invention, and FIG.
FIG. 4 is a partial sectional view showing a cathode ray tube device according to the present invention constructed using the main components shown in FIGS. In the figure, 1 is a cathode ray tube, 2 is a stem part, 3 is a stem pin, 4 is a connecting member, 6 is an external lead wire, 7
is a stem cover base, 8 and 9 are both end surfaces of the stem cover base, 10 is a stem cover lid body,
11 is a lead wire guide part, 14 is a large part of the outer diameter of the stem cover base, 15 is a small part of the outer diameter of the stem cover base, 20 is a position regulating part, 21
22 is an inclined portion, 22 is a through hole, 23 is an inclined wall, 25 is an annular projection, 27 is an insulating resin, and 28 is a sealing member.

Claims (1)

[Scope of utility model registration request] The stem pin installed in the stem portion of the cathode ray tube and the external lead wire are electrically connected by a connecting member made of a conductor, forming a ring, and the connecting member is positioned inside the ring. The stem cover base, on which a position regulating part is formed, is attached to the stem part of the cathode ray tube, with the external lead wire passing through the ring and the connecting member being located in the position regulating part. A stem cover lid body is disposed with one end surface in contact with the stem cover lid body, which is a plate-shaped body and has a lead wire guide portion for leading out the external lead wire. disposed on the other end surface side of the stem cover base while being engaged with the wire guide portion;
A cathode ray tube device in which an insulating resin is injected into the stem portion of the cathode ray tube, a stem cover base body, and a portion surrounded by a stem cover lid body.