JPH08241768A - Coaxial type pin jack and pin plug for electronic equipment - Google Patents

Abstract

PURPOSE: To provide coaxial type pin jack and pin plug for electronic equipment in which no noise is generated when the pin plug is pulled out and inserted in the state where the power source of an equipment is ON. CONSTITUTION: A pin jack 2 is formed of a central signal pin socket 21 and an earthing jack sleeve 23 concentrically provided around it through a jack insulating material 22, and has a coil spring 27 for energizing the jack sleeve 23 toward the side of a pin plug 1 to be inserted. When the pin plug 1 is inserted, a plug sleeve 13 first makes contact with the jack sleeve 23 to short- circuit an earth wire first. Thereafter, a pin 11 is fitted to the pin socket 21 to short-circuit a signal line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial type pin jack and a pin plug used for electronic equipment such as audio and video.

[0002]

2. Description of the Related Art For coaxial type pin jacks and pin plugs used in electronic devices for audio and video, there are standards established by the Japan Electronic Machinery Manufacturers Association (for example, E
IAJRC-5231). FIG. 4 is a perspective partial sectional view showing an example of a conventional pin jack and pin plug according to this standard.

First, the pin plug 1 is mainly composed of a signal pin 11 provided in the center and a grounding plug sleeve 13 concentrically provided around the pin 11 via a plug insulating material 12. It is configured. The pin 11 has a round bar shape with a diameter of about 3.25 mm, and a cylindrical plug insulating material 12 is arranged around the pin 11 concentrically with the axis of the pin 11. A cylindrical plug sleeve 13 is similarly arranged concentrically around the plug insulating material 12.
The inner diameter of the plug sleeve is about 8.2 mm. Further, the periphery of the plug sleeve 13 is covered with a cover made of plastic, rubber or the like.
The tip of 3 is exposed as shown in FIG. Further, the pin 11 projects from the tip edge of the plug sleeve 13.

Such a pin plug 1 is fixed to the tip of a cable such as a coaxial cable having a signal line at the center and a mesh-shaped ground wire provided around the signal line via an insulating material. The pin 11 and the plug sleeve 13 are provided with a pin terminal and a sleeve terminal (not shown) for connecting the signal line and the ground line, which are connected by a method such as soldering.

On the other hand, the pin jack 2 to which the pin plug 1 is connected is provided concentrically with a signal pin socket 21 provided at the center and a jack insulating material 22 around the pin socket 21. It is mainly composed of a jack sleeve 23 for grounding. Pin socket 2
Reference numeral 1 denotes a bottomed tubular shape into which the pin 11 of the pin plug 1 can be fitted, and is arranged with its end opening facing the side where the pin 11 enters. A terminal rod 24 for wiring to the pin socket 21 is provided at the bottom of the pin socket 21 and projects to the side opposite to the tip opening.

Around the pin socket 21, a substantially cylindrical jack insulating material 22 is concentrically arranged. The jack insulating material 22 is longer than the pin socket 21, and the pin socket 21 is arranged on the front side of the jack insulating material 22 in the direction of the pin entry. Around the jack insulating material 22, a substantially cylindrical jack sleeve 23 is also concentrically arranged. The jack sleeve 23 has a shape in which a circumferential slit is formed in a thick wall portion of a cylinder, and an opening of the slit is directed to a side where the pin plug 1 enters. The jack sleeve 23 extends in the side opposite to the opening of the slit and has a tubular terminal piece 25.
Has been extended. An outer cover 26 is arranged around the jack sleeve 23, and the outer cover 26 has
A collar plate 27 is provided perpendicular to the entering direction of the pin 11. The collar plate 27 is for fixing to a case of an electronic device or the like. A signal line and a ground line are respectively connected to the terminal rod 24 of the pin socket 21 and the terminal piece 25 of the jack sleeve 23.

When the conventional pin plug 1 and the pin jack 2 having the above-mentioned structure are combined, the pin 1 of the pin plug 1
Insert 1 into the jack insulation material 22 of the pin jack 2,
Push the entire pin plug 1 into the pin jack 2. Then, first, the pin 11 is fitted into the pin socket 21 and the signal line is short-circuited. When the pin plug 1 is further pushed in, the tip of the plug sleeve 13 comes into contact with and fits into the jack sleeve 23. This shorts the ground wire.

[0008]

As described above, in the conventional coaxial type pin jack and pin plug for electronic equipment,
First, the signal line is short-circuited and then the ground line is short-circuited.
The reverse is true when pulling out the pin plug, and the signal line is opened after the ground line is opened. This means that the ground line is always open when the signal line is shorted or opened. For this reason, in the conventional pin jacks and pin plugs, noise was often generated when the pin plugs were inserted and removed while the device was powered on. The present invention has been made to solve the above problems, and an object of the present invention is to provide a pin jack and a pin plug that do not generate noise even when the pin plug is removed and inserted while the power of the device is turned on.

[0009]

In order to achieve the above object, the invention according to claim 1 of the present application is such that a signal pin socket provided at the center and a concentric pin socket with an insulating material around the pin socket. In a coaxial type pin jack for an electronic device, which comprises a jack sleeve for grounding provided in a ring shape, a spring member for urging the jack sleeve toward the pin plug side inserted into the pin jack is provided, and the tip surface of the jack sleeve is When the pin plug is inserted into this pin jack, the plug sleeve of the pin plug is located at a position where it first comes into contact with the pin sleeve, and after the plug sleeve comes into contact with the jack sleeve, the pin of the pin plug opposes the bias of the spring member. Is a structure in which the pin plug and the pin jack are coupled to each other by contacting the It has a configuration that is set to a size that does not decoupled with emissions jack. Similarly, in order to achieve the above object, the invention according to claim 2 has a signal pin provided in the center, and a grounding plug sleeve concentrically provided around the pin via an insulating material. A coaxial pin plug for electronic equipment, which has a spring member for urging the plug sleeve toward the pin jack side into which the pin plug is inserted, and the tip surface of the plug sleeve is a pin jack when the pin plug is inserted into the pin jack. Is located at a position where the jack sleeve first comes into contact, and after the plug sleeve comes into contact with the jack sleeve, the pin of the pin plug comes into contact with the pin socket against the bias of the spring member so that the pin plug and the pin jack are joined. The bias of the spring member is
The size of the pin plug and the pin jack are set so that the pin plug and the pin jack are not disengaged. Similarly, in order to achieve the above object, the invention according to claim 3 is the structure of claim 1 in which the pin plug and the pin plug are combined. It has a configuration in which a reinforcing mechanism for reinforcing the is provided. Further, similarly, in order to achieve the above-mentioned object, the invention according to claim 4 has a structure in which a reinforcing mechanism for reinforcing the connection with the pin jack is provided in the structure according to claim 2.

[0010]

EXAMPLES Examples of the present invention will be described below. FIG.
FIG. 3 is a schematic partial cross-sectional view illustrating an embodiment of the pin jack and the pin plug of the present invention.

First, the pin plug 1 will be described. The pin plug 1 of FIG. 1 has a configuration in which a pin 11 and a plug sleeve 13 are concentrically provided on a plug body 10 with a plug insulating material 12 interposed therebetween. The plug body 10 has a substantially cylindrical shape having a lid portion at its tip, and the lid portion at its tip has a circular opening with a diameter of about 6 mm. The cylindrical plug insulating material 12 is concentrically fitted and provided in the circular opening. The inner diameter of the plug insulating material 12 is sized to match the outer diameter of the pin 11, and the pin 11 is inserted into the plug insulating material 12 so as to penetrate therethrough and protrude from the tip of the plug body 10. Has become. The rear end of the pin 11 is connected to the plug body 10
It is located inside. The material of the pin 11 and the plug body is, for example, a copper alloy, and the surface thereof is subjected to treatment such as gold plating. The material of the plug insulating material 12 is, for example, fluororesin or the like.

On the other hand, a substantially cylindrical plug sleeve 13 is provided on the tip surface of the plug body 10 so as to stand in the protruding direction of the pin 11. The central axis of the plug sleeve 13 coincides with the central axis of the pin 11, and the pin 11 and the plug sleeve 13 are concentric. As shown in FIG. 1, the plug sleeve 13 is provided with a slit-shaped notch 14 which is long in the axial direction. This notch 14
Are evenly provided in the circumferential direction, for example, about six. Moreover, as shown in FIG. 1, the plug sleeve 13 has a shape in which the diameter of the tip end side portion is gradually reduced. The tip of the pin 11 slightly projects from the tip of the plug sleeve 13. Similarly, the plug sleeve 13 is also made of a copper alloy or the like whose surface is plated with gold. Around the plug body 10 and the plug sleeve 13 provided on the tip end surface thereof, a substantially cylindrical fixing sleeve 15 is arranged. The fixing sleeve 15 is provided as a reinforcing mechanism that reinforces the connection with the pin jack 2, and its tip portion is inclined inward as shown in FIG. The inclination of the tip portion toward the inside is slightly larger than the inclination of the tip portion of the plug sleeve 13. Further, the threaded portion 15 is provided on the inner surface of the rear end portion of the fixing sleeve 15.
1 is formed. The fixing sleeve 15 is configured to be free to move in the axial direction and the circumferential direction around the plug body 10 and the plug sleeve 13.

On the other hand, a threaded portion 101 is formed on the peripheral surface of the rear end portion of the plug body 10. The threaded portion 101 is for screwing the threaded portion 151 of the fixing sleeve 15 to fix the fixing sleeve 15 to the plug body 10. To describe the connection structure with a cable, first, about half of the plug body 10 on the tip side is cut out in a semi-cylindrical shape, and the rear end of the pin 11 is exposed. The signal line of the cable is this pin 11
It is connected to the rear end by a method such as soldering. Also,
A terminal piece 16 for connecting the ground wire is provided at a position rearward of the rear end of the pin 11. This terminal piece 1
Although not clear from FIG. 1, 6 is formed so as to extend in an arc shape from the edge of the part cut out in a semi-cylindrical shape, and a ground wire is provided so as not to come into contact with the signal line passing near the central axis. It can be soldered. The rear end of the plug body 10 has an opening, and a cable is inserted through the opening to make the above connection.

The description of the pin plug 1 has been completed, and the configuration of the pin jack 2 will be described next. The pin jack 2 has a configuration in which a pin socket 21 and a jack sleeve 23 are concentrically provided on a jack body 20 via a jack insulating material 22. The jack body 20 has a substantially cylindrical shape having an inner diameter of 6.5 mm and an outer diameter of about 8 mm, and is located on the side opposite to the side (hereinafter, the front end side) where the pin plug 1 enters (hereinafter, the rear end side). It has a ring-shaped brim portion 24. The jack insulating material 22 has an outer diameter that matches the inner diameter of the jack body 20, and
It is installed by being fitted inside. The material of the jack body 20 is, like the pins 11 and the like, a copper alloy or the like having a surface plated with gold. A short cylindrical terminal piece 25 is provided at the rear end of the jack body 20.

The jack insulating material 22 has a slightly larger inner diameter on the rear end side, and the pin socket 2 is located at this position.
1 is arranged. As shown in FIG. 1, the pin socket 2
1 has a substantially cylindrical shape in which the diameter gradually increases toward the front end side, the front end side is an opening, and the bottom portion is formed on the rear end side. Although not apparent from FIG. 1, the pin socket 21 is provided with thin slit-shaped cuts extending from the front edge toward the rear end evenly along the circumferential direction. A terminal rod 26 is provided on the back surface of the bottom of the pin socket 21 and extends in the axial direction. A hole having a size adapted to the outer diameter of the terminal rod 26 is provided at the rear end of the jack insulating material 22, and the terminal rod 26 is fitted in the hole and penetrated.

Around the jack insulating material 22 as described above, a substantially cylindrical jack sleeve 23 is arranged. The inner diameter of the jack sleeve 23 is equal to the jack insulating material 2
Slightly larger than the outer diameter of 2. Further, the length of the jack sleeve 23 is slightly shorter than the length of the jack insulating material 22. At the rear end of such a jack sleeve 23, as shown in FIG.
A coil spring 27 as a spring member is arranged as shown in FIG. The rear end of the coil of the coil spring 27 is in contact with the flange portion 24 of the jack body 20, and the coil spring 27 is located between the flange portion 24 and the jack sleeve 23. As described above, although the length is slightly shorter than the jack sleeve 23, the coil spring 2
7, the tip of the jack sleeve 23 is slightly projected from the tip of the jack insulating material 22. Similarly, the material of the jack sleeve 23 is also a copper alloy or the like having the surface plated with gold.

The pin jack 2 having the above structure has a jack cover 2 having a diameter larger than that of the jack sleeve 23.
It is stored in 8. The jack cover 28 has a bottomed tubular shape, and is arranged with its opening facing the side where the pin plug 1 enters. A mounting hole for fixing the jack body 20 is provided at the bottom of the jack cover 28.
The jack body 20 is attached to the jack cover so as to fit into the attachment hole. A cover flange 281 is formed on the periphery of the opening at the tip of the jack cover 28, and the entire pin jack 2 is attached by fixing the cover flange 281 to the electronic device case 3 or the like. .

The pin jack 2 of this embodiment having the above-mentioned structure
The operation of the pin plug 1 will be described below. Holding the plug body 10 of FIG. 1, the entire pin plug 1 is pressed against the pin jack 2. Then, first, the tip of the plug sleeve 13 comes into contact with the tip of the jack sleeve 23. When the pin plug 1 is pushed further, the plug sleeve 13 pushes the jack sleeve 23 against the bias of the coil spring 27, and the plug sleeve 13 is pushed.
Are fitted so as to be inserted between the jack sleeve 23 and the jack body 20. Further pin plug 1
When is pushed in, the tip of the pin 11 reaches the inside of the pin socket 21, and the pin 11 is fitted into the pin socket 21 while slightly expanding the pin socket 21.
When the pin plug 1 is further pushed in, the pin 11 is completely fitted into the pin socket 21, and the tip portion of the plug sleeve 13 which is inclined inside is completely fitted between the jack sleeve 23 and the jack body 20, The coil spring 27 is in the most contracted state. In this state, the urging force of the coil spring 27 is strongest, but even in this state, the urging force of the coil spring 27 is set to a size that does not release the connection between the pin plug 1 and the pin jack 2. There is.

Although the insertion of the pin plug 1 is completed in this state, in order to reinforce the connection between the pin plug 1 and the pin jack 2, the fixing sleeve 15 provided on the pin plug 1 is screwed. That is, the fixing sleeve 15 is pushed down to the rear end side of the pin plug 1, and the threaded portion 151 on the inner surface of the fixing sleeve 15 is screwed into the threaded portion 101 on the peripheral surface of the plug body 10 and screwed. At this time, since the inward inclination of the tip portion of the fixing sleeve 15 is slightly larger than the inclination of the tip portion of the plug sleeve 13, the tip portion of the fixing sleeve 15 is the tip portion of the plug sleeve 13. Apply force to compress inward. As described above, the plug sleeve 13 is provided with the slit-shaped notches 14 that are long in the axial direction evenly in the circumferential direction, so that the compression of the fixing sleeve 15 causes the plug sleeve 13 to be caulked inward, and the plug sleeve Thirteen
Is in a state of being firmly pressed against the side surface of the jack body 20.

Next, the case where the pin plug 1 is pulled out from the pin jack 2 will be described. First, the fixing sleeve 15 of the pin plug 1 is rotated to release the screw connection with the plug body 10, and the pin plug body 10 is pulled out to the front side. Then, first, the pin 11 retracts and comes out of the pin socket 21, and is positioned inside the tip portion of the jack insulating material 22. In this state, the plug sleeve 13 is still inserted between the jack sleeve 23 and the jack body 20, and the ground wire is short-circuited. When the pin plug 1 is further pulled out, the plug sleeve 13 comes out between the jack sleeve 23 and the jack body 20,
The ground wire is opened. The jack sleeve 23 is
As the pin plug 1 retracts, it moves forward due to the urging of the coil spring 27, and when the pin plug 1 is completely pulled out, it returns to the initial position before the pin plug 1 was inserted.

As can be seen from the above description of the operation, according to the pin plug 1 and the pin jack 2 of this embodiment, when the pin plug 1 is inserted into the pin jack 2, the ground wire is short-circuited first and then the signal line is short-circuited. . And pin plug 1
When pulling out from the pin jack 2, the signal line is opened and then the ground line is opened. In other words, the ground line is always short-circuited when the signal line is short-circuited or opened.
Noise generated by short-circuiting or opening of the signal line is removed.

Since the coil spring 27 as a spring member is provided on the side of the pin jack 2 in this embodiment having the above-mentioned structure, it is an embodiment corresponding to the invention of claim 1 in that sense. Further, since the fixing sleeve 15 as the reinforcing mechanism is provided on the pin plug 1, it is the embodiment corresponding to claim 4 in that sense. Next, an embodiment corresponding to the invention of claim 2 will be described. FIG. 2 is a schematic sectional view for explaining an embodiment corresponding to claim 2, and shows a schematic sectional view of a pin plug 1 provided with a spring member.

As shown in FIG. 2, in this embodiment, a spring member composed of a coil spring 17 is arranged so as to be interposed between the rear end of the plug sleeve 13 and the front end of the plug body. Further, a cylindrical auxiliary frame 18 that guides the back and forth movement of the plug sleeve 13 is fixed inside the coil spring 17. Since the coil spring 17 is used, the tip end of the plug sleeve 13 projects forward of the tip end of the pin 11 unlike the conventional one shown in FIG. When such a pin plug 1 is inserted into, for example, a conventional pin jack 2 as shown in FIG. 4, the plug sleeve 13 first comes into contact with the jack sleeve 23 and the plug sleeve 13 is jacked against the bias of the coil spring 17. It is fitted into the sleeve 23. And then the pin 11 is the pin socket 2
It is inserted into 1. The same applies to the case of pulling out, in which the pin 11 first comes out of the pin socket 21 and then the plug sleeve 13 is pulled out of the jack sleeve 23. Therefore, similar to the case shown in FIG. 1, noise generated when the signal line is short-circuited or opened is removed.

Next, an embodiment corresponding to the invention of claim 3 in which a reinforcing mechanism is provided on the side of the pin jack 2 will be described. FIG. 3 is a schematic sectional view for explaining an embodiment corresponding to claim 3. In the pin jack 2 of this embodiment, a fixing sleeve 29 is provided around the jack sleeve 23. This fixing sleeve 29 has a tip portion bent inwardly and inclined like the fixing sleeve 15 of FIG. A threaded portion 291 is formed on the inner surface of the rear end portion of the fixing sleeve 29, and the corresponding jack body 2
A threaded portion 201 is also formed on the peripheral surface of 0. On the other hand, as shown in FIG. 3, the pin plug 1 to be inserted into the pin jack 2 has a plug sleeve 13 having a shape in which the tip portion is bent outward and the diameter is gradually increased. The plug sleeve 13 shown in FIG. 3 is also provided with slit-shaped notches that are long in the axial direction evenly in the circumferential direction, like the plug sleeve 13 of FIG. The pin plug 1 having such a configuration is inserted into the pin jack 2 of FIG. 3, the pin 11 is completely fitted into the pin socket 21, and then the fixing sleeve 29 is retracted and screwed into the jack body 20 to fix the pin. The tip portion bent inward of the sleeve 29 for use is in a state in which the tip portion of the plug sleeve 13 is compressed inward and pressed against the jack body 20 to be locked, so that the coupling strength between the pin plug 1 and the pin jack 2 is reinforced. It becomes a state.

Although the coil springs 27 and 17 are used as the spring members in the above description, the present invention is not limited to this, and other spring members such as leaf springs can also be used. Further, the spring member is not limited to the one that uses the elastic force of an individual, and a member that uses a fluid such as an air cushion can be adopted. Further, as the reinforcing mechanism, a mechanism of compressing the plug sleeve 13 and pressing it against the jack body 20 is adopted, but the mechanism is not limited to this, and the cover provided on the pin plug 1 is fixed to the body of the pin jack 2 for fixing. It is also possible to adopt a structure such as fixing by screwing into the screw part or fixing with a special screw.

[0026]

As described above, according to the pin jack of claim 1 or the pin plug of claim 2, when the signal line is short-circuited or opened, the ground line is always short-circuited. , It is possible to insert and remove the pin plug without noise. According to the pin jack of claim 3 or the pin plug of claim 4, in addition to the effect of the invention of claim 1 or 2, since the connection between the pin plug and the pin jack is reinforced, the pin plug is less likely to come off. The effect is obtained. Particularly, in the present invention, since the pin plug is connected to the pin jack against the bias of the spring member, the adoption of such a reinforcing mechanism exerts a special effect.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional view illustrating an embodiment of a pin jack and a pin plug of the present invention.

FIG. 2 is a schematic sectional view illustrating an embodiment corresponding to claim 2.

FIG. 3 is a schematic sectional view illustrating an embodiment corresponding to claim 3;

FIG. 4 is a perspective partial sectional view showing an example of a conventional pin jack and pin plug.

[Explanation of symbols]

 1 pin plug 10 plug body 11 pin 12 plug insulating material 13 plug sleeve 15 fixing sleeve 17 coil spring 2 pin jack 20 jack body 21 pin socket 22 jack insulating material 23 jack sleeve 27 coil spring 29 fixing sleeve

Claims (4)

[Claims] 1. A coaxial pin jack for electronic equipment, comprising: a signal pin socket provided in the center; and a grounding jack sleeve concentrically provided around the pin socket via an insulating material. , There is a spring member that biases the jack sleeve toward the pin plug that is inserted into the pin jack, and the tip surface of the jack sleeve is the position where the plug sleeve of the pin plug first contacts when the pin plug is inserted into this pin jack. The pin sleeve contacts the pin sleeve against the bias of the spring member after the plug sleeve comes into contact with the jack sleeve, and the pin plug and the pin jack are joined together. Is
A coaxial type pin jack for electronic equipment, characterized in that the size is set so that the connection between the pin plug and the pin jack is not broken. 2. A coaxial pin plug for an electronic device, which comprises a signal pin provided in the center and a grounding plug sleeve concentrically provided around the pin via an insulating material, wherein the pin plug is inserted. It has a spring member that biases the plug sleeve toward the pin jack side, and the tip surface of the plug sleeve is located at a position where the jack sleeve of the pin jack first comes into contact when the pin plug is inserted into the pin jack. After the plug sleeve comes into contact with the jack sleeve, the pin of the pin plug comes into contact with the pin socket against the bias of the spring member so that the pin plug and the pin jack are joined together. The coaxial type for electronic equipment is characterized in that the size is set so that the connection between the pin jack and the pin jack is not released. Plug or. 3. The pin jack according to claim 1, further comprising a reinforcing mechanism for reinforcing the connection with the pin plug. 4. The pin plug according to claim 2, further comprising a reinforcing mechanism for reinforcing the connection with the pin jack.