JPS6326950Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a small-diameter plug adapter that includes a small-diameter three-pole plug and a jack into which a three-pole plug having a diameter different from the small-diameter three-pole plug is inserted.

A conventional three-prong plug adapter consists of a tip, an intermediate sleeve, a sleeve, and an insertion part into which another three-prong plug is inserted. The connection portion with the intermediate sleeve is formed so as to be housed inside the sleeve of the - three-pole plug, and the overall length of the three-pole plug after connection is formed to be as short as possible. Also with chips,
Connections between contacts that are in direct contact with the tips of other three-prong plugs, and between intermediate sleeves and contacts that are in contact with intermediate sleeves of other three-prong plugs may be screwed, press-fit, pressure welded, or sandwiched. Usually, a connection method such as tangential connection is adopted. However, in a small-diameter plug adapter, for example, a three-prong plug with a sleeve diameter of 2.5 mm and a jack into which the three-prong plug with a sleeve diameter of 3.5 mm is inserted, the connection part is 2.5 mm. Housing the chip in a sleeve with an outer diameter of However, there are also problems in that the contact force is insufficient due to insufficient strength and the joints become loose, making them impractical. Furthermore, in connection methods such as press-fitting and press-fitting, there remains the same problem of loosening of the joint due to insufficient strength. Therefore, in small-diameter plug adapters, an important issue is how to form the joint between the tip and intermediate sleeve and the contact. The purpose of this invention is to solve the above-mentioned problems, and to provide a new small-diameter plug adapter that has a simple structure, high processing efficiency, and is formed so that the connecting portion does not loosen.

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

FIG. 1 is an enlarged sectional view of a small-diameter plug adapter according to this invention. In the figure, 1 is a chip, 2 is an intermediate sleeve, 3 is a sleeve, 4 is a fixed base, 5 is a case, 6 is a chip contact, 7 is an intermediate sleeve contact, 8 is an insulating bush, and 9 is a fixed body. The tip 1 is formed of a head end 10 and a connector 11 projecting and extending from the center of the inner end surface of the head end 10.
The connector 11 has a smaller diameter near the protrusion to form a small diameter portion 12, and a flange 13 is provided near the edge, and an end concentrically with the small diameter portion 12 extends from the center of the flange 13. The edge portion 14 is formed to protrude. The intermediate sleeve 2 is formed by integrally forming a cylindrical connector 16 with a small diameter on a short cylindrical intermediate sleeve main body 15, and providing a boss portion 17 with a thick wall at the end edge. Moreover, the inner diameter of the cylindrical connector 16 is
It is formed to have a diameter that allows the flange 13 of the chip 1 to pass through. The sleeve 3 is formed into a cylindrical shape with a flange 19 integrally provided, and the outer diameter of the cylindrical portion 18 is the same as that of the intermediate sleeve body 1.
The inner diameter is formed to be the same as the outer diameter of the intermediate sleeve 5, and the inner diameter is formed to a diameter through which the boss portion 17 of the intermediate sleeve 2 can pass.

The fixed base 4 is formed in the shape of a ring with a seat, and its inner diameter is set to a size that allows the sleeve 3 to be inserted and fixed therein. The case 5 is formed into a cylindrical shape with a bottom, and has an insertion opening 20 in the center of the bottom into which the sleeve of another three-prong plug slides.
The outer diameter of the ring is formed to a size that allows insertion and fixation with a tightening allowance. Further, the chip contactor 6 is provided with a truncated conical cylindrical mounting portion 22 that protrudes from the center of the circular flat contactor substrate 21, and the large diameter of the mounting portion 22 is set to the end edge portion 14 of the chip 1. Form the same diameter as the. Further, a connecting piece 23 formed into a width-like plate is formed from one end of the contactor board 21, and a contact portion 24 formed by curving the edge of the connecting piece 23 into an arc shape is provided. Further, like the chip contactor 6, the intermediate sleeve contactor 7 is provided with a truncated conical cylindrical attachment portion 26 protruding from the center of the circular flat contactor substrate 25, and the attachment portion 26 has a large circular diameter. is formed to have the same outer diameter as the boss portion 17 of the intermediate sleeve 2. Further, a connecting piece 27 formed in the shape of a width plate is provided from one end of the contactor board 25, and a contact portion 28 curved in an arc shape is provided at the edge of the connecting piece 27. The insulating bushing 8 has a bottomed cylindrical bushing body 29 made of a synthetic resin material, and has a fitting opening 20 for the case 5 on the bottom surface.
The outer diameter of the sleeve body 29 is formed to be the same as the inner diameter of the case 5, and a pair of opposing rectangular opening grooves 31 are formed inside the sleeve body 29 at the opening edge. It is formed by providing it from the top to the bottom part. The opening width of this opening groove 31 is
and connecting pieces 23, 27 of intermediate sleeve contactor 7
The size should be set so that there is a slight loose fit.

Next, the correlation between the components formed as described above will be explained.

The sleeve 3 is formed so that the cylindrical part 18 is inserted into the fixed base 4, the cylindrical part 18 protrudes from the seating surface of the fixed base 4, and the collar part 19 of the sleeve 3 is inserted into the fixed base 4. Formed so as to be in close contact with the end face. Further, in the intermediate sleeve 2, the connector 16 is inserted from the boss portion 17 into the cylindrical portion 18 of the sleeve 3 in the above-mentioned state, and the stepped connecting edge of the sleeve body 15 and the connector 16 is inserted into the cylindrical portion of the sleeve 3. The boss portion 17 is formed so as to be spaced apart from the open end of the portion 18 and protrude through the collar portion 19 of the sleeve 3 at the same time. Also, the space between the intermediate sleeve main body 15 and the sleeve 3, the loose fit between the connector 16 and the cylindrical portion 18, and the flange 1.
The distance between the lower edge of the boss portion 17 and the lower edge of the boss portion 17 is fixed by an insulator 32 made of an insulating material. In this case the insulator 32
Forms a pedestal 33 for the intermediate sleeve contactor 7, which has an outer diameter that overlaps the flange 19 at the spaced apart portion between the flange 19 and the boss 17.

The tip 1 is inserted into the intermediate sleeve 2 in the above-mentioned state, and the inner end surface of the head end 10 and the opening edge of the intermediate sleeve main body 15 are separated from each other, and the small diameter portion 12 of the connector 11 is inserted into the intermediate sleeve 2. The flange 13 is formed so as to loosely fit into the connector 16 of the boss 17 and protrude from the opening edge of the boss 17. Further, the distance between the head end 10 and the intermediate sleeve body 15, the loose fit between the small diameter portion 12 and the connector 16, and the distance between the front end of the boss 17 and the collar 13 are determined by the insulator 3 formed of an insulating material.
Fix it at 4. Further, the separating portion between the boss portion 17 and the collar portion 13 is fixed with an insulator 34. Further, the separating part between the boss part 17 and the flange part 13 connects the insulator 34 to a cradle 35 of the chip contactor 6 having the same outer diameter as the outer diameter of the boss part 17.
to form. The pedestal 35 embeds the flange 13 and is formed on the same surface as the flange 13. In addition, in this state, the intermediate sleeve contactor 7 is attached to the mounting portion 2 of the contactor board 25.
6 is inserted into the boss portion 17, and provided so that the large diameter surface of the contact board 25 comes into contact with the pedestal 33, and the connecting piece 27
The contact 28 of the three-prong plug is formed so as to face the axis, and contact the intermediate sleeve of the other inserted three-prong plug. Further, the chip contactor 6 is provided so that the mounting part 22 of the contactor board 21 is inserted into the terminal end part 14 of the chip 1, and the large diameter surface of the contactor board 21 is in contact with the collar part 13 and the pedestal 35. The connecting piece 23 faces the connecting piece 27 of the intermediate sleeve contactor 7, and the contactor 24 is formed to face the axis and contact the tip of the other inserted three-prong plug. In this state, a cylindrical fixed body 9 is formed, which has a length between the inner end surface of the fixed base 4 and the end surface of the terminal end 14 of the chip 1, and has an outer diameter slightly smaller than the outer diameter of the fixed base 4. are formed of an insulating material, and the connecting portion between the boss portion 17 of the intermediate sleeve 2 and the intermediate sleeve contactor 7, the connecting portion between the terminal end portion 14 of the chip 1 and the tip contactor 6, and the connecting portion of the intermediate sleeve contactor 7. A part of the piece 27 and a part of the connection piece 23 of the chip contactor 6 are buried. Therefore, in this state, the chip 1, intermediate sleeve 2, sleeve 3, fixed base 4, chip contact 6 and intermediate sleeve contact 7 form an independent plug terminal fixed together. Furthermore, an insulating bushing 8 is provided within the case 5. The insulating bushing 8 is provided so that the outer edge of the bottom surface contacts the inner edge of the bottom surface of the case 5, and the opening groove 31 is provided at a position to guide the intermediate sleeve contactor 7 and the tip contactor 6, respectively, and the contact portions 24 and 28 It is formed to protrude from the opening edge of the opening groove 31. A case 5 having an insulating bush 8 provided inside the case 5 is inserted and fixed to the fixed base 4 so that the fixed body 9 and the insulating bush 8 are in contact with each other.

Since this device is constructed as claimed in the utility model registration based on the above-mentioned embodiment, the chip and the intermediate sleeve to be housed in the small-diameter sleeve can be formed to have the maximum possible diameter, so the mechanical strength is insufficient. will no longer occur. In addition, since the tip and intermediate sleeve are fixed by a pedestal formed by embedding the collar of the tip, the tip and intermediate sleeve are
There will be no more movement. Further, since the intermediate sleeve and the sleeve are fixed by the pedestal formed between the boss portion of the intermediate sleeve and the collar portion of the sleeve, they do not move in either the axial direction or the radial direction. Further, since the joint between the tip contactor and the chip and the joint between the intermediate sleeve and the intermediate sleeve contactor are integrally fixed by the fixed body, problems of axial movement and loosening are eliminated. Furthermore, since the tip contact and the intermediate sleeve contact are guided in the opening groove of the insulating bushing, there is no risk of bending. Further, since there is no need for complicated machining, the machining efficiency of small-diameter parts is high, and assembly is easy. Furthermore, since the insulating bushing is in contact with the bottom of the case and the fixed body, the fixed body itself does not move, and once molded, it is possible to provide a small diameter plug adapter that will not be damaged or malfunction.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of the small diameter plug adapter according to this invention, Fig. 2 is a sectional view of the tip contactor,
3 is a sectional view of the intermediate sleeve contactor, FIG. 4 is a view taken along line AA in FIG. 1, and FIG. 5 is a view taken along line BB in FIG. 1. 1... Chip, 2... Intermediate sleeve, 3... Sleeve, 4... Fixed base, 5... Case, 6...
Chip contact, 7... Intermediate sleeve contact, 8...
... Insulating bushing, 9 ... Fixed body, 10 ... Head end, 11, 16 ... Connector, 12 ... Small diameter part, 1
3, 19... Flange portion, 14... Edge portion, 15... Intermediate sleeve body, 17... Boss portion, 18... Cylindrical portion, 20... Insertion opening, 21, 25... Contact board , 22, 26... Mounting part, 23, 27... Connection piece, 24, 28... Contact part, 29... Bush body, 30... Through hole, 31... Opening groove, 32, 3
4... Insulator, 33, 35... pedestal.

Claims (1)

[Scope of utility model registration request] In a plug adapter provided with a three-prong plug having a small sleeve diameter and a jack into which another three-prong plug having a different sleeve diameter is inserted, a head end 10 and a jack protruding from the center of the inner end surface of the head end 10 are provided. A connector 11 having a small diameter portion 12 formed with a small diameter near the protrusion, a flange 13 near the end, and an end edge 14 concentrically protruding from the center of the flange 13.
The intermediate sleeve main body 15 is formed into a short cylindrical shape, and the connector 16 is formed into a cylindrical shape with a small diameter and has a boss portion 17 with a thick wall near the end. The boss portion 1 is integrally formed, and the opening edge of the intermediate sleeve body 15 is separated from the inner end surface of the head end portion 10 of the tip 1, and the connector 16 is formed with a loose fit on the outside of the small diameter portion 12.
An intermediate sleeve 2 formed by separating 7 from the flange 13
Then, the spacing between the intermediate sleeve body 15 and the head end 10 and the loose fit between the connector 16 and the small diameter portion 12 are filled, and the spacing between the boss portion 17 and the collar portion 13 is made to have the same diameter as the boss portion 17. The edge portion 14 of the flange portion 13 is formed.
The insulator 34 formed on the pedestal 35 having the same surface as the side end surface, the cylindrical portion 18 and the flange 19 formed at the end of the cylindrical portion 18 are integrally formed to form an opening edge of the cylindrical portion 18. The intermediate sleeve main body 15 is separated from the stepped connecting edge, and the cylindrical portion 18 is formed with a loose fit provided on the outside of the connector 16, and the end surface of the flange portion 19 is formed so as to be separated from the lower edge of the boss portion 17. The space between the sleeve 3 and the stepped connecting edge of the intermediate sleeve main body 15 and the cylindrical portion 18 and the loose fit between the connector 16 and the cylindrical portion are filled, and the flange portion 19 and the lower edge of the boss portion 17 are spaced apart. Tsuba part 1 between
9 and an insulator 32 formed on a pedestal 33 having an outer diameter that overlaps with the lower edge of the boss portion 17 and the same surface as the lower edge of the boss portion 17; A fixed base 4 that is in contact with the end surface and in which the outer circumferential surface of the cylindrical part 18 is in close contact with the inner circumferential surface, a mounting part 22 formed in the shape of a truncated conical cylinder protruding from the center of a flat contact board 21, and a contact. A width plate-like connecting piece 23 is provided from one end of the board 21, the edge of the connecting piece 23 is formed into an arc-shaped contact part 24, and the mounting part 22 is press-fitted into the edge part 14 of the chip 1 to form a contact board. A chip contactor 6 in which the large-diameter surface of 21 is in contact with a pedestal 35 of an insulator 34, a connecting piece 23 extends parallel to the axis, and a contact portion 24 faces the axis to form a convex surface, and a flat contactor substrate. A mounting part 26 formed in the shape of a truncated conical cylinder protruding from the center of the contact board 25 and a connecting piece 27 in the shape of a width plate are provided from one end of the contact board 25. The mounting portion 26 is press-fitted into the boss portion 17 of the intermediate sleeve 2, the large diameter surface of the contact board 25 is brought into contact with the pedestal 33 of the insulator 32, and the connecting piece 27 is connected to the connecting piece 23 of the chip contact 6. The intermediate sleeve contacts 7 face each other and extend parallel to the axis, and the contact portion 28 faces the axis and forms a convex surface. The flange 19 of the sleeve 3 and the insulator 32 are formed into a circular shape having a diameter slightly smaller than the outer diameter and flush with the end surface of the end edge 14 of the chip 1.
the pedestal 33 of the intermediate sleeve 2, the boss portion 17 of the intermediate sleeve 2, the mounting portion 26 of the intermediate sleeve contactor 7, a part of the connector 27, the pedestal 35 of the insulator 34, the edge portion 14 of the chip 1 and the chip contactor 6 Mounting part 2
2 and a fixed body 9 formed of a synthetic resin material in which a part of the connecting piece 23 is embedded, and a fixed body 9 formed in a cylindrical shape with a bottom, with an insertion opening 20 provided in the center of the bottom surface, and an inner circumferential surface of the cylindrical opening. A case 5 that is fixed in close contact with the outer circumferential surface of the fixed base 4, a bushing body 29 formed of a synthetic resin material into a cylindrical shape with a bottom, and a bushing body 29 located at the center of the bottom of the bushing body 29 concentrically with the same diameter as the insertion opening. Through-holes 30 are formed in pairs on the inside of the cylinder wall, and rectangular opening grooves 31 are formed in parallel to the axis from the opening edge of the cylinder to the bottom. The inner peripheral surface of the case 5 is brought into close contact with the outer peripheral edge of the bottom surface of the case 5, the opening edge of the cylindrical portion is brought into contact with the end surface of the fixed body 9, and the contact piece 23 of the chip contactor 6 and the intermediate sleeve are brought into contact with each other. A small-diameter plug adapter characterized in that a connecting piece 27 of a contactor 7 is fitted into an opening groove 31, and an insulating bush 8 is provided in which contact portions 24 and 28 are formed to protrude from the edge of the opening.