JP3126971B1 - CRT socket with resistance element - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To provide a CRT socket with a resistance element in which the shapes of a resistance element (16) and a focus contact (7) are simplified, and connection work of the resistance element (16) is easy. SOLUTION: A connecting plate (7a) of a focus contact (7) is radially arranged from the center of a cylindrical base insertion hole (8), and a resistive element (16) is connected to an external lead on an extension of the connecting plate. Install the terminal (17).
The resistance element (16) is connected to the connecting plate (7a) and the terminal (1).
7) Since the resistive element (16) is arranged linearly between the focus elements (7),
Since the focus contact (7) does not need to avoid the resistance element (16), it can be formed in a simple shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002] The present invention relates to a CRT (Cathode-Ray) for connecting a cathode ray tube used for a color television or the like.
The present invention relates to a structure of a socket, and more particularly, to a CRT socket with a resistance element in which a resistance element is connected in series to a focus contact.

[0003]

2. Description of the Related Art Conventionally, in a CRT socket for connecting a cathode ray tube, an unnecessary radiation signal generated by a high-frequency signal applied to the cathode of the cathode ray tube enters a focus circuit block and affects the focus of an electron beam. To reduce this effect, a terminal connected to the flyback transformer via an external lead wire is attached to the CRT socket, and a resistance element is connected in series between the terminal and the focus contact inside the CRT socket. I was connected.

[0004] The resistance element can be connected by soldering the lead portions on both sides thereof directly to the terminal and the focus contact, respectively. However, the resistance element is required to be as small as possible in the housing of the CRT socket. The connecting operation was extremely difficult. Therefore,
Conventionally, a CRT socket with a resistance element has been employed in which both side lead portions of the resistance element are pressed and connected to pressure contact slits recessed in the terminal and the focus contact.

[0005] This conventional CRT socket with a resistance element 1
8 will be described with reference to FIGS. 8 to 10. FIG.
FIG. 9 is a plan view of the socket 101, FIG. 9 is a rear view of the main part without the bottom cover 102c, and FIG. 10 is a perspective view of the main part showing the connection structure of the resistance element 115.

As shown in these figures, the CRT socket 101 is composed of a cylindrical housing 102a having a cylindrical base insertion hole 116 formed therein and a rectangular box-shaped housing 102b behind (upper in FIG. 8). Each component described later is attached to the insulating housing body 102 molded from the rear side and assembled. For this attachment, the square housing 102b has an opening surface on the back (bottom) side, and after each component is stored, the opening surface is covered with a bottom lid 102c that engages with the square housing 102b. .

The cathode ray tube is connected to the surface (flat surface) of the cylindrical housing 102a, and as shown in FIG.
The signal contact portions 104a of the plurality of signal contacts 104 and the high-voltage contact portions 105a of the pair of focus contacts 105A and 105B are formed on the flat side of the cylindrical housing 102a so as to be fitted with the respective pins of the cathode ray tube neck. It faces one circumference which is concentric with the base insertion hole 116.

[0008] Focus contacts 105A, 105B
Since a higher voltage is applied to the signal contacts 104 than the signal contacts 104, the connecting plate 105b connected to the high-voltage contacts 105a is connected to the lower housing 102b.

As shown in FIG. 9, the focus contacts 105A and 105B are pulled out of the high-pressure contact portion 105a in the direction of the box-shaped housing 102b in parallel with each other.
5b is bent in a crank shape because the resistance element 115 is accommodated on the side, and the focus side discharge electrode plate 107 and the resistance element 115 are connected to the other side.

Also, the other focus contact 105
B connecting plate 105b is also a focus contact 105A.
In order to secure an insulation distance from the connecting plate 105b, an external lead wire 114 which is similarly bent into a crank shape and is inserted from the flat side of the box-shaped housing 102b is connected to the other end of the connecting plate 105b.

The connection structure of one focus contact 105A will be described in more detail.
In A, the other end of the connecting plate 105b is bent in a downward U-shape as shown in FIG. 10, and two parallel pressure contact slits are formed in the bent portion. Among these, the press-contact slit on the right side in the figure is a connection piece 1 of the focus-side discharge electrode plate 107 formed so that the center protrudes in a spherical shape.
A discharge connection portion 105d for press-fitting the electrode 07a is provided, and the focus contact 105A is electrically connected to the focus-side discharge electrode plate 107.

Further, the left pressure contact slit is provided with the resistance element 1.
A connection connecting portion 105c that press-fits the fifteen lead portions 115a and connects the focus contact 105A to one side of the resistance element 115 is formed.

The focus-side discharge electrode plate 107 is opposed to a similarly formed ground-side discharge electrode plate 109 so as to form a discharge gap in a discharge space 108 formed in the box-shaped housing 102b. This discharge gap does not act particularly at a normal voltage applied to the focus contact 105A. When an in-tube discharge occurs in the cathode ray tube, the spark energy is discharged to the ground-side discharge electrode plate 109, 10
This prevents reverse flow from 5A to the semiconductor element in the circuit.

In FIG. 9, a terminal accommodating recess 111 is formed on the side of the cell-shaped housing 102b, which is separated from the discharge gap chamber 108 by the partition wall 110, from the back side opening surface, and the external connection portion 112a and the resistance connection portion are formed. A terminal 112 in which 112b are integrally connected is accommodated. The portion of the terminal housing recess 111 where the external connection portion 112a is housed penetrates into the plane side of the square housing 102b,
One end of an external lead wire (not shown) having the other end connected to the flyback transformer is inserted into the through hole 113 (see FIG. 8) from the plane side to make elastic contact with the external connection portion 112a. Further, the resistance connection portion 112b is connected to the connection plate 105.
Similarly to the end of b, as shown in FIG. 10, it is bent in a downward U-shape, and a press contact slit 117 is formed in the bent portion.

Both side lead portions 115a of resistance element 115
Are pressed into the resistance connection portion 112b and the connection connection portion 105c of the focus contact 105A, respectively, from the opening surface 103 of the square housing 102b.
A resistance element 115 is connected in series between A and the flyback transformer.

[0016]

However, the above-mentioned CRT socket 101 is provided with a focus contact 105A in an insulated housing body 102 which needs to be downsized.
Since the connection plate 105b and the resistance element 115 are accommodated in parallel, the lead 115a of the resistance element 115 is bent into a U-shape and connected to the connection connection part 105c.

For this reason, it is necessary to prepare a resistance element 115 having a lead portion 115a of a predetermined length. Also,
The lead portion 115a must be bent at the time of connection, and not only is the workability of the assembly poor, but also the lead portion 115a to which a high voltage is applied is connected to the signal contact 104.
Approached, and there was a risk of a short circuit.

The connecting plate 1 is also provided on the focus contact 105 side in order to avoid a space for disposing the resistance element 115.
It was necessary to bend the 05b into a crank shape, and the material removal was poor, the processing was complicated, and this caused an increase in cost.

In particular, the two focus contacts 105
In the so-called double focus contact type CRT socket 101 to which the A and 105B are attached, one of the focus contacts 105A is bent into a crank shape, so that the other focus contact 105B is similarly formed into a crank shape in order to insulate and avoid contact. It was necessary to use a bent one.

Further, the focus contacts 105A, 1
Since the connecting plates 105b of 05B are pulled out from the high-pressure contact portion 105a in parallel with each other, a slit, an insulating partition or the like is formed between the connecting plates 105b so as to prevent a short circuit therebetween, thereby ensuring a sufficient creepage distance. Needed.

Further, two parallel pressure contact slits are provided at the other end of the connection plate 105b, and the focus side discharge electrode plate 10
7 and the lead 115 of the resistance element 115
a is press-fitted and connected to each other, eliminating the solder connection step.
In the case where the connecting piece 107a) is not press-fitted, there is a problem that the other is loosened and a reliable connection cannot be maintained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a CRT socket with a resistance element in which the shapes of the resistance element and the focus contact are simplified and the connection operation of the resistance element is easy. The purpose is to:

[0023]

According to a first aspect of the present invention, there is provided a CRT socket with a resistance element, wherein a cylindrical base insertion hole is formed, and a signal contact portion of a plurality of signal contacts is formed. An insulating housing facing one circumference concentric with the base insertion hole, a first high-voltage contact portion that contacts a focus pin of a cathode ray tube on one side of the first connection plate, and the first high-pressure contact portion is in signal contact. A first focus contact attached to the insulating housing so as to face the same circumference as the portion, a terminal attached to the inside of the insulating housing and connected to a first external lead wire connected from the outside of the insulating housing; The first formed on the other side of the connecting plate
In a CRT socket with a resistance element, comprising a connection element and a resistance element connected between the terminals, and electrically connecting the first external lead wire to a focus pin of the cathode ray tube via the resistance element, the first connection plate includes: The first focus contact is attached to the insulating housing so as to be arranged radially from the center of the cylindrical base insertion hole .
Press-connecting to press-connect one lead of the resistance element to the connecting plate
A slit is formed as the first connection connection portion, and the other
A terminal having a press-connecting portion for press-connecting one of the lead portions is attached to a portion in an insulating housing on an extension of the first connecting plate, and the first connecting connections arranged on the same straight line.
And the crimp connection, connect the lead on both sides of the resistance element.
The first connection plate, the resistance element, and the terminal are linearly arranged by pressure connection .

Since the first connecting plate is radially arranged from the center of the cylindrical base insertion hole, the resistive element and the terminal can be arranged on an extension of the discharge gap room, avoiding the discharge gap room. Since the resistance element is linearly arranged between the first connection plate and the terminal, the lead part of the resistance element can be connected to the first connection connection part while keeping the lead part straight.

In the CRT socket with a resistance element according to the second aspect, a second high-voltage contact portion is formed on one side of the second connecting plate to be in contact with the focus pin of the cathode ray tube, and the second high-voltage contact portion is in the same circle as the signal contact portion. The second focus contact attached to the insulating housing so as to face the periphery is insulated from the first focus contact, and the second connecting plate is radially arranged from the center of the cylindrical base insertion hole. It is characterized in that it is attached to an insulating housing, and a second connection connecting portion formed on the other side of the second connecting plate is connected to a second external lead wire connected from the outside of the insulating housing.

Since the first connecting plate and the second connecting plate are arranged radially, the first connecting portion and the second connecting portion are separated from each other and the creepage distance is long, so that short-circuiting is difficult.

According to a third aspect of the present invention, the focus-side discharge electrode plate and the ground-side discharge electrode plate are mounted in an insulating housing so as to be opposed to each other with a discharge gap therebetween in the discharge gap chamber. The other side of the first connection plate is bent at a right angle to the front side or the back side of the insulating housing to form a discharge connection portion elastically contacting the focus side discharge electrode plate at the bent end portion, and the first connection is formed at the bent portion. A press-connecting slit is formed along the longitudinal direction of the plate to form a first connecting connecting portion for press-connecting the lead portion of the resistance element.

Since the discharge connection portion and the first connection connection portion are formed so as to overlap with each other in the vertical direction of the insulating housing, the first focus contact can be connected to the focus side discharge electrode plate without taking up space in the plane of the insulating housing. Can be connected to a resistance element.

Further, since the first connection connection portion is a pressure contact connection structure independent of the discharge connection portion, the connection is reliably maintained even when the focus side discharge electrode plate is not connected to the discharge electrode portion.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A CRT socket 1 with a resistance element according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of a CRT socket 1 and FIG.
Shows an insulating housing 2 and (a) shows a socket body 3
(B) is a plan view of the cover portion 5. Also,
FIG. 3 shows a CRT in which a part of the socket body 3 is cut away.
FIG. 4 is an exploded perspective view of the cover 5, FIG. 5A is a front view of the focus contact 7,
6B is a side view, FIG. 6C is a bottom view, FIG. 6 is a longitudinal sectional view of the cover 5 taken along the first connecting plate 7a, and FIG. FIG.

The CRT socket 1 according to the present embodiment is
A so-called double focus contact type CRT socket 1 has a plurality of signal contacts 6, 6,... And a pair of focus contacts 7A, 7B attached to an insulating housing 2 formed by injection molding of synthetic resin.

The insulating housing 2 is, as shown in FIG.
A socket body 3 having a base insertion hole 8 formed in the center of the front (right side in the figure), and a base 3a behind the socket body 3.
And a cover part 5 that covers the cover, and both are formed by injection molding of synthetic resin.

The base insertion hole 8 is formed in a cylindrical shape having an inside diameter slightly larger than the outside diameter of the base so that the base of the cathode ray tube is inserted from the surface side of the ring-shaped portion 3. In the socket body 3, signal contact accommodating chambers 9 are recessed from the back side at nine positions on the same circumference outside the base insertion hole 8, and the upper side thereof is directed to the front side by a pin insertion hole 10. Communicating.

As shown in FIG. 7, the signal contact 6 attached to the signal contact accommodating chamber 9 from the rear side is formed by bending an elongated strip-shaped conductive metal plate, and the upper end bent in a crank shape is further provided. A leaf-shaped signal contact portion 6a that is bent at an acute angle and has a V-shape in cross section, and a lead-out portion 6c that is connected to the pattern of the printed wiring board 120 by soldering at the other end of the crank shape.

When each signal contact 6 is mounted in the signal contact accommodating chamber 9, the signal contact portion 6a faces the surface of the socket body 3 through the pin insertion hole 10 on the same circumference and is arranged on the circumference. The signal pins of the cathode ray tube. That is, each signal pin of the cathode ray tube is guided into the signal contact accommodating chamber 9 by the pin insertion hole 10 formed in the corresponding portion, and elastically contacts the signal contact portion 6a.

The base 3a at the rear of the socket body 3 is provided with a cover 5 as apparent from a comparison between FIGS.
The outline of the plane is shaped to fit the cover portion 5 from the outside so as to cover the entire back side of the device, and it has a square shape in which the partition 13 is erected along the outline.

In front of the base 3a, three slits 1 are provided.
2, 12, 12 define a pair of fan-shaped recesses 4, 4 centering on the base insertion hole 8. Fan-shaped recesses 4, 4
Is located on the same circumference as the front ring-shaped portion of the socket body 3 and covers the periphery of the sector-shaped recesses 4, 4.
3 a constitutes a part of the inner wall of the base insertion hole 8.

As shown in FIG. 6, on both sides of the base portion 3a, engaging frame portions which engage with the engaging projections 5a of the cover portion 5 in a state of covering the back side of the cover portion 5 to be integrated. 4b is erected. Further, when integrated with the cover portion 5, the insulating protrusion 1 protrudes into the cover portion 5 and prevents discharge between conductive portions such as the focus contacts 7 housed in the cover portion 5.
4 is formed inside surrounded by the partition 13.

As shown in FIG. 4, the cover 5 accommodates a pair of discharge electrode plates 15A and 15B, a resistance element 16, and a terminal 17 in addition to the pair of focus contacts 7A and 7B.

The focus contact accommodating chambers 18 for accommodating the focus contacts 7A and 7B, a connection connection chamber 26 for connecting the focus discharge electrode plate 15A to the focus contact 7A, and a pair of discharge electrode plates 15A and 1A.
The discharge chamber 19 facing the space 5B and the two lead connection chambers 20 and 27 for inserting external lead wires are respectively insulated from the inner top surface of the cover portion 5 (in FIG. 4, the inner bottom surface). It is formed of a concave portion separated from the other room by the projecting wall 21. When the cover portion 5 is engaged with the base portion 3a of the socket body 3, the cut-out portion of the insulating protruding wall 21 is covered with the insulating protrusion 14 of the cover portion 5, and the spaces between the chambers are more reliably insulated. Discharge is prevented.

The fan-shaped recesses 4, 4 of the base 3a of the cover 5
The portion that fits inside the pair is a pair of projections 22, 22 formed in a fan shape, and the focus contact storage chambers 18, 18 are respectively attached to the pair of projections 22, 22 on the rear side. From the front side (upward). As shown in FIG. 6, the upper part of the focus contact storage chamber 18 communicates with the front side of the cover 5 through a focus pin insertion hole 23 into which a focus pin is inserted. The focus pin insertion hole 23 is provided with the signal contact 6 when the base 3a and the cover 5 are engaged and assembled.
Pin insertion hole 10 exposing signal contact portion 6a of
And is communicated with the upper part of the front wall of the focus contact accommodating chamber 18 so that the focus pin of the cathode ray tube is connected to the focus contact accommodating chamber 1.
8 is guided downward along the front wall surface.

The focus contact 7 is formed by bending an elongated strip-shaped conductive metal plate. As shown in FIG. 5, a high-voltage contact portion 24 and a spring contact portion 25 are provided on both sides in the longitudinal direction of the connecting plate 7a. Each is erected. High pressure contact 2
Numeral 4 is provided continuously on the front side of the connecting plate 7a, and comprises a standing support portion 24a and a leaf contact portion 24b whose upper end is bent at an acute angle and formed on its free end side. . The leaf spring contact portion 24b is bent forward at the center, and is formed in a leaf shape with a V-shaped cross section.

The focus contact accommodating chamber 18 accommodates the high-pressure contact portion 24 of the focus contact 7, and the locking claws on both sides of the support portion 24 a are recessed on the inner surface of the focus contact accommodating chamber 18. Groove 18c
(Refer to FIG. 4), and focus contact storage chamber 1
8 is positioned and accommodated. In this housed state, the support portion 24a stands along the rear surface in the focus contact storage chamber 18, that is, the rear wall surface facing the base insertion hole 8, and the leaf spring contact portion 24b is supported by the support portion 24a. Is a cantilever spring facing the lower part of the focus pin insertion hole 23 with the upper side of the focus pin as a fixed end.

The spring contact portion 25 is formed of a spring contact piece 25a in which the rear of the connecting plate 7a is bent at a right angle to the surface side, and the bent upper end is further bent back to an acute angle. As shown in FIGS. 3 and 4, each connecting plate 7 a of the pair of focus contacts 7 </ b> A and 7 </ b> B is attached to the cover 5 radially around the base insertion hole 8. The spring contact portion 25 of one of the focus contacts 7A is inserted and positioned in the connection connection chamber 26, and spring-contacts the connection plate portion 15a of the focus-side discharge electrode plate 15A exposed across the connection connection chamber 26. The tip of the piece 25a makes elastic contact (see FIG. 6).

The spring contact portion 25 of the other focus contact 7B serves as a connection connection portion for connecting to an external lead wire, and is provided in the first lead connection chamber 20 opening on the front surface side.
And a second external lead wire (not shown) inserted from the front side between the spring contact piece 25a and the inner side surface of the second lead connection chamber 20 for electrical connection. That is, by forming the pair of focus contacts 7A and 7B connected to the discharge electrode plate 15 and the external lead wires to have the same shape, the same components are shared, the number of components is reduced, and even if each of them is mounted on the other side, there is an error. I try not to connect.

Further, since the connecting plates 7a of the focus contacts 7A and 7B are arranged radially, their rear ends are separated from each other, and the creepage distance between the connecting plates 7a can be naturally increased.

As shown in FIG. 4, a press contact slit 28 is further formed in the focus contact 7 along the longitudinal direction from the center of the connecting plate 7a to the spring contact portion 25 at the rear bent portion. I have. This press contact slit 28
Is for electrically connecting the inner lead portion 16a of the resistance element 16 behind the focus contact 7A, and serves as a connection connection part for connecting to an external lead wire via the resistance element 16. The groove width of the press contact slit 28 is formed to be slightly smaller than the outer diameter of the inner lead portion 16a, and the inner lead portion 16a is moved from the front side to the press contact slit 2a.
8, and both are electrically connected.

A pair of discharge electrode plates 15A and 15B have a hemispherical discharge portion 15b formed at the center of a rectangular plate, and the discharge chambers 19b are arranged so that the discharge portions 15b and 15b face each other. It is attached to the cover 5 along the surrounding insulating projection wall 21.

On one side of the rectangular plate of the focus-side discharge electrode plate 15A, an L-shaped connection plate portion 15a that traverses the connection connection chamber 26 is formed integrally, and as described above, the focus contact 7A Is connected to the spring contact portion 25.
Further, a leg 15c is integrally provided on the other ground-side discharge electrode plate 15B from a rectangular plate so as to penetrate the base 3a and to be soldered to a ground pattern of the printed wiring board 120. .

As described above, the focus side discharge electrode plate 15
A, the focus contact 7A is connected to the ground-side discharge electrode plate 1
By connecting a ground pattern to the discharge portion 5B and facing the discharge portions 15b with a discharge gap therebetween, when spark energy generated in the cathode ray tube is applied to the focus contact 7A, discharge occurs between the discharge portions 15b and 15b. And flow to the ground pattern.

A first lead connection chamber 27 penetrating the front and back of the cover 5 is formed on an extension of the connection plate 7a on the side of the focus contacts 7A arranged radially. First
The lead connection chamber 27 accommodates a terminal 17 for connecting a first external lead wire (not shown) and the resistance element 16, and as shown in FIG. 6, an intermediate inner diameter is reduced and inserted from the front side. The first external lead wire is guided to the terminal 17.

The terminal 17 is formed by bending a conductive strip-shaped metal plate as shown in FIGS.
A lead connection piece 17a formed by folding back at an acute angle is provided on the front side, and a press connection section 17b having a press contact slit formed at the folded center is provided on the rear side. Terminal 17
Is mounted in the lead connection chamber 27 by locking a locking claw projecting from the side surface thereof to the inner side surface of the lead connection chamber 27. In the attached state, the lead connecting piece 17 on the front side is
“a” faces the middle lower part of the narrowed lead connection chamber 27 and holds and electrically connects a first external lead wire inserted from the front side. Further, the lower press contact portion 17b is exposed on an extension of the press contact slit 28 of the focus contact 7A. Therefore, the outer lead portion 16b of the resistance element 16 linearly arranged between the focus contact 7A and the focus contact 7A can be press-fitted into the press-contact connection portion 17b and electrically connected to the terminal 17. As a result, the resistive element 16 is arranged in the same straight line as the focus contact 7A, and the focus contact 7A is connected to the first through the resistive element 16 and the terminal 17.
Make electrical connections to external leads.

The assembly of the CRT socket 1 with a resistor is as follows.
From the rear side of the socket body 3, the signal contacts 6, 6,.
・ Press-fit parts such as earth metal fittings. Also,
Similarly, the cover part 5 has the above-described components and the like attached thereto from above with the rear opening surface facing upward. Next, the cover 5 accommodating each component is placed on the front surface side of the socket body 3 so as to be fitted into the partition 13 of the base 3a, and the engaging projection 5a of the cover 5 and the base 3a are The insulating housing 2 is integrated with the engaging frame 4b. At this time, the partition 13a of the base 3a is
Is covered from the back side, the creepage distance between the focus contacts 7A and 7B and the signal contact 6 or between the focus contacts 7A and 7B is sufficiently long for insulation.

The integrated CRT socket 1 is shown in FIG.
As shown in (1), the printed circuit board 120 is mounted, and the signal contacts 6, 6,... And the legs 15c of the ground-side discharge electrode plate 15B are soldered to corresponding patterns.

Subsequently, a first external lead wire having the other end connected to a flyback transformer (not shown) and the like and a second external lead wire are respectively connected to the first and second lead connection chambers 27 and 2.
0 and connected to the terminal 17 and the focus contact 7B to complete the assembly. In mounting and connecting these components, the printed wiring board 12
Since there is no solder connection step except for the mounting step to 0, assembly and connection work can be easily performed, and each component can be easily replaced.

When a cathode ray tube is connected to the CRT socket 1 with a resistor configured as described above from the front side, the contact portion 6a of the leaf-shaped signal contact 6 and the high-voltage contact portion 24 of the focus contact 7 are respectively connected to the cathode ray tube. Make elastic contact with each pin. At this time, since the connecting plates 7a of the focus contacts 7 are radially arranged with the base insertion hole 8 as a center, the high-pressure contact portion 24 formed by being bent so as to be orthogonal to the longitudinal direction thereof has the base insertion hole. 8 is elastically deformed in the center direction. Therefore, since there is no elastic contact with the focus pin in a direction deviated from the center of the cathode ray tube, the cathode ray tube can be connected without difficulty, and the high-pressure contact portion 24 is not deformed by plastic deformation due to kinking.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the cover 5 and the ring-shaped portion of the socket body 3 are integrally formed, and the cover 5 is formed.
May be covered by a base 3a separately molded.

In the above embodiment, the description has been given of the double focus contact type CRT socket 1 to which the two focus contacts 7A and 7B are attached. However, the focus contact may be connected to an external lead wire via the resistor element 16. For example, the present invention can be applied to a CRT socket having only one focus contact.

Also, two focus contacts 7A,
7B is not necessarily limited to the same shape, and at least one of them may be arranged radially around the base insertion hole 8.

Although the high-pressure contact portions 24 of the focus contacts 7A and 7B are formed in a leaf shape, the high-pressure contact portions 24 may be formed in the middle of a cylindrical shape, and may be of a stocky type in which the focus pin is elastically contacted in the middle.

[0061]

According to the first aspect of the present invention, the resistance element is
Since it is arranged linearly between the first connecting plate and the terminal,
The lead portion of the resistance element can be connected to the first connection portion while keeping the lead portion straight. Therefore, it is not necessary to perform bending of the lead portion at the time of connection, and the connection operation is facilitated.

Further, since the lead portion of the resistance element can be made short and straight, a sufficient creepage distance with the signal contact can be secured.

Since it is not necessary to devise the shape of the focus contact so as to avoid the space for disposing the resistor element, the focus contact can be manufactured in a simple shape with a good yield of material and at a low cost.

According to the second aspect of the present invention, in addition to the first aspect, the first connection plate and the second connection plate of the two focus contacts are radially arranged, so that the first connection connection is achieved. The portion and the second connection portion are separated from each other.

Accordingly, the creepage distance between the focus contacts or between the focus-side discharge electrode plate and the second external lead wire connected thereto is naturally increased, so that the insulation can be performed more reliably.

Further, since the rear ends of the two focus contacts are separated from each other, a discharge gap chamber can be formed without any loss therebetween.

According to the third aspect of the present invention, in addition to the first or second aspect, the discharge connection portion and the first connection connection portion are formed so as to overlap with each other in the vertical direction of the insulating housing. The first focus contact can be connected to the focus-side discharge electrode plate and the resistance element without taking up space in the direction.

Further, since the first connection connection portion is a pressure contact connection structure independent of the discharge connection portion, the connection is reliably maintained even when the focus side discharge electrode plate is not connected to the discharge electrode portion.

[0069]

[Brief description of the drawings]

FIG. 1 is a perspective view of a CRT socket 1. FIG.

2A and 2B show various parts of the insulating housing 2, wherein FIG. 2A is a plan view of a socket body 3, and FIG.

FIG. 3 shows a CRT in which a part of the socket body 3 is cut away.
FIG. 2 is a bottom view of the socket 1.

FIG. 4 is an exploded perspective view of a cover 5.

5A is a front view of the focus contact 7, FIG.
(B) is the same side view, (c) is the same bottom view.

FIG. 6 is a longitudinal sectional view showing attachment of a cover unit 5;

FIG. 7 is a partially broken side view of the CRT socket 1 according to the embodiment of the present invention.

FIG. 8 is a plan view of a conventional CRT socket 101 with a resistance element.

FIG. 9 is a rear view of a main part of the CRT socket 101 excluding a bottom cover 102c.

FIG. 10 is a perspective view of a main part showing a connection structure of a resistance element 115.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CRT socket 2 Insulated housing 6 Signal contact 6a Signal contact part 7A Focus contact 7B Focus contact 7a Connecting plate 8 Base insertion hole 15A Focus side discharge electrode plate 15B Ground side discharge electrode plate 16 Resistance element 17 Terminal 24 High voltage contact part 25 Spring contact Part, discharge connection part (second connection part) 28 pressure contact slit (first connection part)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 33/945 H01R 13/68 H01R 33/74

Claims (3)

(57) [Claims] A signal contact portion (6a) of a plurality of signal contacts (6) is provided with a cylindrical base insertion hole (8).
An insulating housing (2) facing one circumference concentric with the base insertion hole (8); and a first high-pressure contact portion (1) contacting the focus pin of the cathode ray tube on one side of the first connecting plate (7a). 24) is formed, and the first high-voltage contact portion (24) is attached to the insulating housing (2) so as to face the same circumference as the signal contact portion (6a).
A focus contact (7A), a terminal (17) mounted in the insulating housing (2) and connected to a first external lead wire connected from the outside of the insulating housing (2), and a first connecting plate (7a). A resistance element (16) connected between the first connection connector (28) formed on the other side and the terminal (17), and a first external lead wire connected to the cathode ray tube via the resistance element (16) CRT with resistive element electrically connected to focus pin
In the socket, the first focus contact (7A) is attached to the insulating housing (2) so that the first connecting plate (7a) is radially arranged from the center of the cylindrical base insertion hole (8) . One of the resistance elements (16) is connected to one connecting plate (7a).
Press-contact slit for press-connecting one of the lead portions (16a).
It is formed as a first connection connection portion (28), and the other lead portion (16b) of the resistance element (16) is press-contacted.
A terminal (17) having a press-connecting portion (17b) formed thereon is attached to a portion in an insulating housing (2) on an extension of the first connecting plate (7a), and the first connecting connections arranged on the same straight line. Part (28) and pressure welding
To both sides of the resistance element (16) to the connection part (17b)
By press-connecting the leads (16a, 16b)
Ri, first connecting plate (7a) and a resistance element (16) and terminals (17), the resistance element with CRT socket, characterized in that the linearly arranged. 2. A second high-voltage contact portion (24) for contacting a focus pin of a cathode ray tube is formed on one side of a second connecting plate (7a), and the second high-pressure contact portion (24) is a signal contact portion (6a).
The second focus contact (7B) attached to the insulating housing (2) so as to face the same circumference as
Insulated from the focus contact (7A), the second connecting plate (7a) is attached to the insulating housing (2) such that the second connecting plate (7a) is radially arranged from the center of the cylindrical base insertion hole (8). 2. The connection according to claim 1, wherein the second connecting connection formed on the other side of the plate is connected to a second external lead connected from outside the insulating housing. CRT socket with resistance element. 3. The focus-side discharge electrode plate (15) is opposed to the discharge gap chamber (19) across a discharge gap.
A) and the grounding-side discharge electrode plate (15B) are mounted in an insulating housing (2), and the other side of the elongated strip-shaped first connecting plate (7a) is perpendicular to the front side or the rear side of the insulating housing (2). To the focus side discharge electrode plate (15
A), a discharge connection portion (25) that elastically contacts the first connection plate (7a) is formed in the bent portion along the longitudinal direction of the first connection plate (7a), and the resistance connection portion (25) is formed.
3. The CR with a resistance element according to claim 1, wherein the lead part is formed as a first connection part for pressure contact connection.
T socket.