JPH024471Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a three-pole plug adapter used when plugs of different nominal sizes are inserted and connected.

The conventional three-prong plug adapter is
A tip terminal having a head end, an intermediate sleeve terminal pairing with the tip terminal to form another pole, and a sleeve terminal forming a third pole are provided concentrically and spaced apart in the axial direction. , a terminal shaft integrally formed with the head end of the chip terminal is inserted and fitted inside the intermediate sleeve terminal and the sleeve terminal, and one end edge is in contact with the chip terminal, and one end edge is the intermediate sleeve terminal. An intermediate sleeve connector is configured to be disposed inside the sleeve terminal in contact with the sleeve terminal. Therefore, with a plug adapter that has a small nominal size, that is, a sleeve diameter, there may be insufficient contact between the chip terminal and the chip connector, and between the intermediate sleeve terminal and the intermediate sleeve connector.
There was a drawback that the problem of insufficient contact occurred due to insufficient strength of the chip connector and the intermediate sleeve connector.
In addition, in order to eliminate this drawback, a second sleeve with a large diameter is provided and connected to the edge of the sleeve, and within the second sleeve, the contact between the chip terminal and the chip connector, and the contact between the intermediate sleeve terminal and the intermediate sleeve are formed. Plug adapters also exist which are configured to provide contact between connectors and intermediate sleeve connectors with intermediate sleeves of other plugs, and contact between tip connectors and tips of other plugs. However, this method has the disadvantage that the overall length of the plug adapter is too long, and at the same time, the diameter of the second sleeve is also too large in order to obtain sufficient mutual pressure between the contact parts. There is.

This invention solves the above-mentioned drawbacks and problems, houses the tip connector and the intermediate sleeve connector in the sleeve, shortens the overall length of the plug adapter, and ensures mutual pressure between the contact parts. It is an object of the present invention to provide a plug adapter which is formed so that it can obtain the desired results, and at the same time is made easy to manufacture.

This invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a sectional view of the plug adapter according to this invention. In the figure, 1 is a chip terminal, 2 is an intermediate sleeve terminal, 3 is a sleeve terminal, 4 is a chip connector, 5 is an intermediate sleeve connector, and 6 is a connector fixture. The chip terminal 1 is formed by integrally providing a head end 7 and a terminal shaft 8 formed in a stepped rod shape extending along the axis of the head end 7, and a circular rod-shaped terminal end of the terminal shaft 8. The chip connector 4 is formed so as to be in contact with the tip 9. The intermediate sleeve terminal 2 is formed into a stepped cylindrical shape, and is connected to an intermediate sleeve base 2a whose diameter is slightly larger than the maximum diameter of the head end 7 formed on the chip terminal 1. , a connecting cylinder 2b formed in a stepped manner with a small diameter is provided, a thick contact base 10 is formed at the end edge of the connecting cylinder 2b, and a contact base 17 is attached to the contact base 17. 1
A contact portion 10 having the same diameter as the inner peripheral edge of 0 and a smaller outer peripheral diameter is provided, and the connecting cylinder 2b and the contact base 10
In addition, a contact portion 11 is positioned within the sleeve 3 and is formed to contact the intermediate sleeve connector 5 at the contact portion 11 . That is, the intermediate sleeve terminal 2
The terminal shaft 8 of the chip terminal 1 is inserted through the terminal shaft 8 concentrically, and the contact portion 11 is provided at a position slightly spaced apart from the lower end of the terminal end portion 9 formed on the terminal shaft 8. Sleeve base 2a
is formed so that the end edge thereof is slightly spaced from the head end 7 of the chip terminal 1, and a gap is formed between the inner peripheral surface of the connecting cylinder 2b formed in a stepped shape on the intermediate sleeve 2 and the outer peripheral surface of the terminal shaft 8. It is formed by providing. The head end 7 of the chip terminal 1, the outer peripheral surface of the terminal shaft 8, and the spacing and gap provided in the intermediate sleeve 2 are filled with an intermediate sleeve insulator 12 made of a synthetic resin material. In this case, the edge of the intermediate sleeve insulator 12 is formed to include the lower part of the terminal end 9 formed on the terminal shaft 8 of the chip terminal 1, and the outer diameter of this part is the same as the contact portion 11 formed on the intermediate sleeve 2. The outer diameter is the same as or slightly smaller than the outside diameter. The sleeve terminal 3 is formed into a cylindrical shape having the same outer diameter as the intermediate sleeve base 2a, and is provided at a distance from the intermediate sleeve base 2a, which has one end edge formed as the intermediate sleeve terminal 2, and is connected to the terminal of the chip terminal 1. It is provided concentrically with the shaft 8, and a sleeve insulator 13 is provided at the joint with the intermediate sleeve terminal 2 and on the inner circumferential surface of the sleeve 3.

As shown in FIGS. 2 and 3, the sleeve insulator 13 is formed by forming the inner diameter of the cylindrical body 14 larger than the outer diameter of the contact portion 11 formed in the intermediate sleeve 2, so that the sleeve insulator 13 is arranged such that the inner diameter of the cylindrical body 14 is larger than the outer diameter of the contact portion 11 formed on the intermediate sleeve 2, and the sleeve insulator 13 is arranged so that the inner diameter of the cylindrical body 14 is larger than the outer diameter of the contact portion 11 formed in the intermediate sleeve 2, and the inner diameter of the cylindrical body 14 is larger than the outer diameter of the contact portion 11 formed on the intermediate sleeve 2. A pair of bottomed grooves 15 having a rectangular cross section are formed parallel to the axis. The cylindrical portion 14 provided with the bottomed groove 15 is formed to the same level as the stepped surface of the contact base 10 formed on the intermediate sleeve 2, and at the same time, as shown in FIG. The slope portion 1 has a gentle slope so that the distance between it and the contact portion 11 decreases as it approaches the stepped surface of the contact base from a slightly separated position.
6, and a protruding base 17 is provided on the same surface as the stepped surface of the contact base 10, that is, at the end of the cylindrical portion 14, the protruding base 17 is formed to have the same width as the bottomed groove 15 and a slightly protruding bottom surface. . The protruding bases 17 are formed in each of the pair of bottomed grooves 15 formed in the intermediate sleeve insulator 13, but they may be formed in only one of the bottomed grooves 15.

As shown in FIGS. 5 and 6, the chip connector 4, the intermediate sleeve contact 5, and the connector fixing device 6 are made of a large diameter fixing device body 18 formed of a synthetic resin material into a short and long cylindrical shape. A pair of guide protrusions 19 having a rectangular cross section are provided on the upper side surface parallel to the axis, and a rectangular bottomed opening groove 20 opening in one circular plane is connected to the axis connecting the guide protrusions 19. The intermediate portions of the chip connector 4 and the intermediate sleeve connector 5, which are formed of a width-like thin plate, are embedded and integrally formed in a connector fixture 6 that is formed parallel to orthogonal axes. In this case, the guide protrusion 19 formed on the fixture body 18 of the connector fixture 6 is
The protrusion width is formed to slide into the bottomed groove 15 of the sleeve insulator 13. In addition, the chip connector 4 is formed shorter than the intermediate sleeve connector 5, and has a connecting end 21 formed into an arc-shaped curved surface at one end, and is connected to the connecting end 21 to form a convex surface in the opposite direction. A protrusion 23 protruding from the width plate surface is formed in the part buried in the fixture main body 18.
It is formed so that it does not come off easily. Further, a flat portion 24 is provided slightly spaced apart from the protrusion 23, and the flat portion 24 is exposed to the opening groove 20 formed in the fixture body 18, and is formed so as to form one side wall surface. This chip connector 4 is provided so as to fix the fixture main body on the axis connecting the pair of guide protrusions 19, and is connected to the flat part 20, and is connected to the opening groove 20.
The contact end 25 is formed by protruding from the end face of the contact end 25 and slightly bent toward the inside of the opening groove 20. Further, the width interval of the opening groove 20 formed in one side wall of the flat part 24 of the chip connector 4 is made slightly smaller than the diameter of the terminal end part 9 of the chip terminal 1.
On the other hand, the intermediate sleeve connector 5 is also formed of a thin plate with the same width as the chip connector 4, and has a connecting end 26 formed with an arc-shaped curved surface at one end, and a pressing surface formed with a convex surface in the direction opposite to the connecting end 26. A protrusion 28 is provided in the part to be embedded in the fixing device main body 18 that protrudes from the width plate surface, and further extends straightly from the fixing device main body 18, and a connecting end is provided on the other end edge. It is formed by providing a contact end 29 formed into an arcuate curved surface in the same direction as 26. In this case, chip connector 4
connecting end 21 of and connecting end 2 of the intermediate sleeve connector 5
6 is formed such that arcuate convex surfaces face each other, and the pressing portion 26 of the chip connector 4 and the intermediate sleeve connector 5
The maximum spacing formed by the pressing portion 27 is made slightly larger than the inner diameter dimension of the cylindrical portion 14 of the sleeve insulator 13. Connector fixture 6 provided with this chip connector 4 and intermediate sleeve connector 5
The guide protrusion 19 formed on the fixture body 18 is
The fixing device main body 1 is inserted into the bottomed groove 15 formed in the cylindrical portion 14 of the sleeve insulator 13 in a pressing manner.
The bottom surface of the opening groove 20 of No. 8 comes into contact with the terminal end 9 formed on the chip terminal 1, and the circumferential side of the terminal end 9 contacts the flat surface 24 of the chip connector 4 with an interference margin, and at the same time, the contact is made. The end 25 is formed to contact the circumferential surface of the terminal end 9 with mutual pressing force due to the elastic force of the tip connector 4. Further, the connection end 29 of the intermediate sleeve connector 5 is connected to a slope portion 1 formed near the end edge of the bottomed groove 15 formed in the sleeve insulator 13.
The sleeve 3 is elastically deformed in the inner direction of the sleeve 3 while being guided by the intermediate sleeve terminal 6, and is pressed by the protruding base 17 so as to be in contact with the circumferential surface of the contact portion 11 of the intermediate sleeve terminal 2 with a strong mutual pressing force. Also in this state,
The pressing portion 22 formed on the chip connector 4 comes into contact with the inner peripheral surface of the sleeve insulator 13 with a mutual pressing force, and the connecting end 21 is elastically deformed inward of the sleeve 3, and other plugs to be inserted and fitted are Form it to make a tight connection with the tip terminal of the terminal. Further, the pressing portion 27 of the intermediate sleeve connector 5 is pressed against the sleeve insulator 1.
3, and the connecting end 26 is pushed inward to form a tight connection with the intermediate sleeve of the other plug terminal. Further, the other plug terminal to be inserted and fitted is formed so as to be inserted and fitted into a fitting hole 31 of a cap 30 that is press-fitted and fixed to the circumferential surface of the opening side end of the sleeve 3.

Since this invention is constructed as claimed in the utility model registration based on the above-mentioned embodiment, the chip connector and the intermediate sleeve connector are provided inside the sleeve terminal, and connections with other plug adapters are also made through the sleeve terminal. Since this is done inside the plug adapter, the overall length of the plug adapter can be reduced to the minimum required length. In addition, the chip terminal and the chip connector are such that the terminal end of the chip terminal is an interference fit with the opening groove forming one side wall of the chip connector.
It is possible to always make sure contact with high mutual pressure. Further, the intermediate sleeve connector is pressed by the pressing base of the sleeve insulator and can reliably contact the contact portion of the intermediate sleeve with a strong mutual pressing force. In addition, the chip connector and the intermediate sleeve connector are fixed to the connector fixture, and the connector fixture is configured to fit into the groove of the sleeve insulator, making it easy to manufacture and assemble, making it a practical plug adapter. It becomes possible to provide

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the plug adapter according to this invention, Fig. 2 is a sectional view with a part of the plug adapter omitted, Fig. 3 is a sectional view taken along line AA in Fig. 2, and Fig. 4 is a sectional view of the plug adapter according to the invention.
The figure is a sectional view taken along line B-B in Fig. 2, Fig. 5 is a sectional view of a connector fixture provided with a connector, and Fig. 6 is a sectional view taken along line C in Fig. 5.
-C sectional view. 1... Chip terminal, 2... Intermediate sleeve terminal,
3... Sleeve terminal, 4... Chip connector, 5...
...Intermediate sleeve connector, 6...Connector fixture, 7
...Head end, 8...Terminal shaft, 9...Terminal end, 11
... Contact portion, 13 ... Sleeve insulator, 14 ...
Cylindrical part, 15... Bottomed groove, 17... Pressing base, 1
8... Fixture main body, 19... Guide projection, 20...
Opening groove, 29...contact end.

Claims (1)

[Scope of utility model registration request] In a three-pole plug adapter in which a chip terminal having a head end, an intermediate sleeve terminal, and a sleeve terminal are arranged concentrically in series, a fixing device body 18 made of a synthetic resin material is formed into a short cylindrical shape, and on the circumferential side thereof. A part of the chip connector 4 formed of a width-like thin plate is attached to the connector fixture 6, which is formed by providing a pair of opposing guide protrusions 19 and an opening groove 20 on one end surface. It is formed in one side wall of the opening groove 20 formed in the fixture 6 and is buried therein, and a part of the intermediate sleeve connector 5 formed of a width-like thin plate is buried opposite the chip connector 4. A sleeve insulator 13 is formed on the inner circumferential surface of the sleeve terminal 3 and is provided with a cylindrical portion 14 having a bottomed groove 15 that slides into the guide protrusion 19 of the fixture body 18. A pressing base 17 is formed by providing a gentle slope 16 at the end of the groove 15, and the opening groove 20 of the connector fixture 6 is formed integrally with the head end 7 of the chip terminal 1 to form a sleeve. A contact end 29 formed at one end of the intermediate sleeve connector 5 is fitted with the terminal end 9 of the terminal shaft 8 extending into the terminal 3 with a clamping margin, and the contact end 29 formed at one end of the intermediate sleeve connector 5 is connected to the pressing base 17 of the sleeve insulator 13.
and sleeve terminal 3 formed on intermediate sleeve terminal 2.
A plug adapter characterized in that the contact portion 11 extending inwardly is formed so as to be clamped with mutual pressure.