JPH0557787U - Plug and jack - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the number of plug electrodes without increasing the axial length of the plug. A jack used as a mating connector for such a plug is provided. [Construction] With regard to the plug P, a pin 6 made of a conductor is made to project into a recessed portion 7 opened at the front end surface of the electric insulating layer 8. As for the jack, the contact piece 260 is projected from the back wall 122 of the plug housing space 120 in the body 110.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a plug used as an electrical connector and a jack used as a mating connector of the plug.

[0002]

[Prior Art]

 The plugs that are generally used in headphone stereo sets suitable for carrying have a chip shape with a diameter of about 3.5 mm. With conventional plugs, there are multiple plugs that are axially spaced on the surface of the plug. A configuration was adopted in which electrodes were provided at each location. Therefore, in order to increase the number of electrodes, the axial length of the plug becomes long in proportion to the number of poles. Therefore, conventionally, the number of electrodes has been suppressed to 4 at most so that the axial length of the plug does not become too long.

However, in order to improve the functionality of the headphone stereo set, it has been practiced to connect not only headphones but also a multi-functional remote control device to the stereo set body. It has become necessary to increase the number of poles.

[0004]

[Problems to be solved by the device]

 However, if the conventional concept of the electrode of the plug is directly followed as described above, there is a problem that the axial length of the plug becomes too long if the plug is provided with more than four poles.

The present invention has been made in view of the above problems, and provides a plug capable of increasing the number of electrodes without increasing the axial length, and a jack used as a mating connector of such a plug. The purpose is to do.

[0006]

According to another aspect of the present invention, there is provided a plug according to claim 1, wherein an electric insulating layer forming a tip portion of the plug and a recess formed in the electric insulating layer and opened at a tip surface of the electric insulating layer. It has an insertion part and a pin made of a conductor protruding into the recessed part.

According to another aspect of the present invention, there is provided a jack, which has an insulative body, a plug accommodating space formed in the body, and a tip of a plug projecting from a back wall of the plug accommodating space and inserted into the plug accommodating space. And a contact piece provided with a contact that is elastically contacted with a pin made of a conductor provided in the portion.

[0008]

[Action]

 In the plug according to the first aspect of the present invention, the number of electrodes is increased only by the number of pins protruding in the recess of the electrically insulating layer. Since the pin projects into the recess, the provision of the pin does not increase the axial length of the plug.

In the jack according to the second aspect of the present invention, the contact provided on the contact piece elastically contacts the pin of the plug inserted into the plug housing space, and the pin and the contact piece are electrically connected.

[0010]

【Example】

 FIG. 1 is a side view of a plug P according to an embodiment of the present invention, FIG. 2 is a vertical side view of the plug P, and FIG. 3 is a front view of the plug P seen from the rear end side.

The plug P shown in FIGS. 1 to 3 has six pole electrodes, and five electrodes (first to fifth poles) 1 to 5 are formed on the outer peripheral surface of the plug P. The remaining one pole (sixth pole) 6 is formed at the tip of the plug.

More specifically, the first pole 1 is formed by integrally forming a large-diameter cylindrical sleeve 12 at the tip of a metallic cylindrical sleeve 11. The second pole 2 is formed by integrally forming a thick cylindrical sleeve 22 on the tip of a metallic cylindrical sleeve 21. The third pole 3 is formed by integrally forming a thick cylindrical sleeve 32 on the tip of a metallic cylindrical sleeve 31. The fourth pole 4 is a tubular sleeve 41 made of metal. The fifth pole 5 is formed by integrally forming a collar portion 52 at an axially intermediate portion of a cylindrical sleeve 51 made of metal. The diameters of the tubular sleeves 11 to 51 extending from the first pole 1 to the fifth pole 5 are formed in this order, and the tubular sleeves 11 to 51 are arranged concentrically. An electric insulating layer 8 made of synthetic resin is interposed between the cylindrical sleeves 11 to 51. The first pole 1 to the fifth pole 5 are exposed on the surface of the electric insulating layer 8 at the tip side section F defined by the collar portion 52 of the fifth pole 5 to form the contact points of the respective poles. In addition, in the rear end side section R as well, the lead-out terminals 1a to 5a corresponding to the respective poles are formed by being exposed on the surface of the electric insulating layer 8.

The sixth pole 6 is formed in the electric insulation layer 8 and protrudes into the recessed portion 7 opened at the tip surface of the electric insulation layer 8. The sixth pole 6 is formed by a pin made of a conductor, and the pin penetrates the electric insulating layer 8. The pin protruding toward the rear end of the electric insulating layer 8 serves as a lead terminal corresponding to the sixth pole 6.

Furthermore, the tip of the first pole 1 is provided with an annular bulge 13 and the tip of the third pole 3 is also provided with an annular bulge 33.

In such a plug P, the first pole 5 to the fifth pole 5 are formed by directly following the conventional concept of the electrode of the plug described at the beginning, but the sixth pole 6 Is provided based on a concept that has never existed before. Then, when the pin 6 is projected into the recessed portion 7 opened at the tip end surface of the electrical insulating layer 8 and used as an electrode, the plug P The axial length can be suppressed to the same length as the axial length of the 5-pole plug.

FIG. 4 is a side view of the jack J according to the embodiment of the invention of claim 2, FIG. 5 is a front view of the jack J, FIG. 6 is a sectional view taken along line BB of FIG. 4, and FIG. 4 is a sectional view taken along line AA of FIG.

The jack J includes a body 110 molded of insulating synthetic resin, a plug housing space 120 formed in the body 110, and first to sixth contact pieces 210 held by the body 110. ~ 260.

More specifically, the first contact piece 210 is formed symmetrically with each of the pair of leg pieces 212, 212 of the U-shaped metal piece 211, and in the radial direction of the plug housing space 120. It is provided with U-shaped contacts 213 and 213 protruding therein. The second contact piece 220 is formed on the leg piece portion 222 of the metal piece 221, and is provided with a U-shaped contact point 223 projecting inward in the radial direction of the plug housing space 120. Similar to the second contact piece 220, the third contact piece 230 is formed on the leg piece 232 of the metal piece 231, and has a U-shape protruding inward in the radial direction of the plug accommodating space 120. The contact point 233 is provided. As shown in FIG. 7, the fourth contact piece 240 is formed on the metal piece 241, and is provided with a contact 243 that protrudes inward in the radial direction of the plug accommodating space 120. As shown in FIG. 6, the fifth contact piece 250 includes a contact 253 that protrudes inward in the radial direction of the plug housing space 120. Then, each of the first to fifth contact pieces 210 to 250 is assembled by being inserted into the body 110 from one side surface side included in the body 110.

As shown in FIG. 5, the sixth contact piece 260 is symmetrically formed on the pair of leg pieces 262 and 262 of the U-shaped metal piece 261, and has a contact point at the tip thereof. 263 and 263 are provided. Then, by inserting the metal piece 261 into the square hole 112 formed by penetrating the tip wall of the body 110, the sixth contact piece 260 is provided on the back wall 122 of the plug accommodating space 120 in a protruding manner.

Reference numerals 215, 225 (not shown in FIG. 5), 235, 245, 255, 265 are lead terminals corresponding to the respective contact pieces 210, 220, 230, 240, 250, 260.

As shown in FIG. 8, when the plug P is inserted into the plug housing space 120 of the jack J, the first pole 1 and the contact 213 of the first contact piece 210, the second pole 2 and the second contact piece 210. The contact 223 of 220, the contact 233 of the third pole 3 and the third contact piece 230, the contact 243 of the fourth pole 4 and the fourth contact piece 240, and the contact 253 of the fifth pole 5 and the fifth contact piece 250, respectively. Make a bullet contact. Further, the pair of sixth contact pieces 260, 260 plunge into the recessed portion 7, so that the sixth pole 6 is separated between the sixth contact pieces 260, 260, and the sixth pole 6 has the sixth contact piece. 260 and 260 make elastic contact. Then, the contact 213 of the first contact piece 210 engages with the bulge portion 13 of the first pole 1, and the contact 233 of the third contact piece 230 engages with the bulge portion 33 of the third pole 3. Therefore, when the plug P is inserted into the jack J, the fitting position (mounting position) of the plug P and the jack J is surely determined, and moreover, a good feeling that the plug P is fitted in the predetermined position is sure. In addition to the above, there is an advantage that the plug P is less likely to be accidentally pulled out due to the engagement at two places. When the plug P is pulled out from the jack J, the contact 213 of the first contact piece 210 rides over the bulging portion 13 of the first pole 1, and the contact 233 of the third contact piece 230 is bulged portion 33 of the third pole 3. A good feel is obtained when overcoming.

Further, as shown in FIG. 8, by matching the shape of the peripheral wall of the plug accommodating space 120 with the outer peripheral shape of the plug P, there is almost no play of the plug P after the plug P is inserted, so that the twisting force is reduced. On the other hand, it becomes possible to exert great strength.

Further, the sixth pole 6 of the plug P of the embodiment is surrounded by the electrically insulating layer 8 around the recessed portion 7, and the first to sixth contact pieces 210 to 110 of the jack J are also surrounded. Since all the contact points 213 to 263 of 260 are housed inside the body 110, there is an advantage that external contamination due to intrusion of dust and the like is prevented.

Although the embodiment has described the 6-pole type plug P and the jack J, the present invention can be similarly applied to the 5-pole or less plug P and the jack J. Further, it is possible to provide electrodes having two or more poles in the recessed portion 7 of the plug P, and by doing so, it is possible to policy plugs having more than six poles. Then, in the jack J as a mating connector of the plug P in which two or more electrodes are provided in the recessed portion 7, it is necessary to project two or more contact pieces in the inner part of the plug accommodating space of the body. There is.

[0025]

[Effect of the device]

 The plug according to the invention of claim 1 increases the number of electrodes by utilizing the inside of the recess formed in the electrically insulating layer forming the tip portion of the plug and projecting a pin made of a conductor into the recess. Therefore, there is an advantage that the axial length of the plug does not become long even if the number of poles is increased.

The jack according to the invention of claim 2 can be used as a mating connector of the plug according to the invention of claim 1.

[Brief description of drawings]

FIG. 1 is a side view of a plug according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a plug.

FIG. 3 is a front view of the plug as viewed from the rear end side.

FIG. 4 is a side view of a jack according to an embodiment of the present invention.

FIG. 5 is a front view of a jack.

6 is a sectional view taken along the line BB of FIG.

7 is a sectional view taken along the line AA of FIG.

FIG. 8 is a vertical sectional side view showing a state where a plug is inserted into a jack.

[Explanation of symbols]

 P plug J jack 6 6th pole (pin) 7 recessed portion 8 electrical insulating layer 110 body 120 plug housing space 122 back wall of plug housing space 260 6th contact piece (contact piece) 263 6th contact piece contact point

Claims (2)

[Scope of utility model registration request] 1. An electrical insulating layer forming a tip portion of the plug, a recessed portion formed in the electrical insulating layer and opened at a tip end surface of the electrical insulating layer, and a conductor protruding into the recessed portion. A plug having a pin. 2. An insulative body, a plug accommodating space formed in the body, and a protrusion provided on a back wall of the plug accommodating space,
And a contact piece having a contact elastically contacted with a pin made of a conductor provided at a tip portion of the plug inserted into the plug housing space.