KR200262639Y1 - Molded Earphone Jack - Google Patents

Abstract

The present invention relates to a miniature molded earphone jack, in particular, the earphone jack of the present invention is a four-terminal earphone plug is inserted into the tip terminal, the first ring terminal, the second ring terminal and the sleeve terminal coaxially arranged in four terminals Consists of a cylindrical earphone jack. The earphone jack has a cylindrical housing of an insulating material, a ring in contact with the sleeve terminal of the earphone plug, a tuning fork tip terminal piece in which inner portions of each end of the branch contact the tip of the tip terminal of the earphone plug, and a first ring terminal of the earphone plug and the other end. A first ring terminal piece in contact with the inside, a second ring terminal piece in contact with the other end of the second ring terminal of the earphone plug, a pipe sleeve terminal, and an insulating cover molded to insulate the outside. Therefore, the present invention realizes a micro-molded earphone jack that can be in contact with an ultra-small 4-terminal rod earphone plug of 2.5 mm or less.

Description

Molded Earphone Jack {Molded Earphone Jack}

The present invention relates to an earphone jack, and more particularly to a molded earphone jack is inserted a small diameter four-pole earphone plug of 2.5mm or less.

In general, the earphone is connected between the earphone part and the plug part by a cord having a predetermined length, and the plug part is inserted into the jack of the audio device to reproduce and output the audio signal provided from the sound device to the earphone part as sound.

In general, a line output jack having a 3.5 mm aperture is used as a standard for audio equipment. However, in recent years, portable audio devices such as mobile phones already have 2.5mm earphone jacks as standard, and MP3 players have adopted 3.5mm jacks or less than 2.5mm earphone jacks due to the miniaturization of products.

In addition, due to the diversification of the functions of the product, a structure of a 4-pole or more multi-pole plug having a control terminal or a power supply terminal in the stereo 3-terminal structure has been shipped to the market.

In response to the 2.5mm 4-pole plug, 2.5mm 4-pole earphone jack parts are introduced to the market. However, the conventional 2.5mm four-pole earphone jack is mounted on a circuit board, and the terminal pieces are usually installed in the periphery of the rectangular parallelepiped housing, and the solder parts of the terminals are exposed to the outside.

Since the conventional earphone jack is mounted on a circuit board, the remaining part except the plug insertion hole is mounted inside the product cover, and thus, there is no need to mold the outside.

Therefore, when molding the soldering portion of the existing earphone jack to use as an external earphone jack, the molding volume of the soldering portion becomes large, so miniaturization is difficult.

Referring to FIG. 1, the earphone device generally includes an earphone unit 10, a cable 12, and a plug 14. In the earphone device, a plug 14 is inserted into the earphone jack 22 of the acoustic device 20 so that the earphone unit 10 and the audio device 20 are electrically connected to each other so that a voice signal drives the speaker of the earphone unit 10. Voice is output.

The length l of the cable 12 of the commercially available earphone device usually has a length of about 1 m to 1.5 m.

Referring to FIG. 2, in order to extend the distance from the sound device to 1.5 m or more in the earphone device, an extension cable 30 is used in the middle. Extension cable 30 includes an earphone jack 32, a cable 34, a plug 36.

Typically, the earphone jack 32 installed at the end of the extension cable 30 is manufactured in a cylindrical shape in consideration of an external appearance, unlike the earphone jack 22 mounted in the acoustic device 20. The earphone jack 22 embedded in the sound device 20 is generally provided with connecting terminals in a rectangular parallelepiped housing, and is configured in such a manner that an external soldering portion of each terminal portion is exposed on a printed circuit board. Therefore, the built-in earphone jack cannot be used as the earphone jack of the connection cable as it is.

Therefore, in the connecting cable, a cylindrical earphone jack is used which is very small and covered with an insulating material up to the part where the signal line and the solder are soldered in consideration of aesthetics.

Due to the miniaturization of audio equipment, the diameter of the plug of the earphone device is miniaturized to less than 2.5mm, and as the stereo audio connection and the connection of the control line or power line are required, the pole of the plug is multi-pole to more than 4 poles. Is going on.

The polarization of the built-in earphone jack is easily possible due to the multipolarization of the plug. However, in consideration of aesthetics, the cylindrical earphone jack is difficult to mount four terminals in a limited space within a range that does not increase the aperture. It is not easy.

The present invention is to provide a miniature 4-terminal molded earphone jack that can be in contact with the four-terminal earphone plug in order to solve the problems of the prior art as described above.

1 is a view showing a general earphone device.

2 is a view showing the earphone device and the extension cord.

Figure 3 is a partially cutaway perspective view of the earphone jack according to the present invention.

Figure 4 is an exploded perspective view of the earphone jack according to the present invention.

5 is a perspective view showing the bottom of the housing of FIG. 4.

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a cross-sectional view taken along the line B-B of FIG.

8 is a cross-sectional view taken along the line C-C of FIG.

9 is a cross-sectional view taken along the line D-D of FIG. 7.

10 is a cross-sectional view taken along the line E-E of FIG.

* Description of the symbols for the main parts of the drawings *

100: earphone jack 110: housing

120 ring 130 tip terminal

140: first ring terminal 150: second ring terminal

160: sleeve terminal 170: elastic member

180: insulation cover 200: cable

300: plug

In order to achieve the above object, the earphone jack of the present invention is a four-terminal earphone jack is inserted into a four-terminal earphone plug in which the tip terminal, the first ring terminal, the second ring terminal and the sleeve terminal are sequentially arranged coaxially, A cylindrical housing made of an insulating material having a hole into which an earphone plug is inserted and extending in a longitudinal direction on the inner wall of the hole and having first and second support groove pairs facing each other, and on the same center line as the housing on the hole inlet side of the housing; It is disposed in the form of a two-pronged ring having a ring in contact with the sleeve terminal of the earphone plug, and a pair of branch portions branched from both sides of the stem portion and the stem portion, the branch portion is inserted into the first support groove pair It is supported, is fixed to the housing so that the stem portion is projected to the outside through the bottom of the hole, the first signal line at the end of the stem portion A tip terminal which is coupled to each end inside of the branch part and contacts a recess of the tip terminal of the earphone plug, and is inserted into a groove of one of the pair of second support grooves so that one end thereof protrudes outward through the bottom of the hole; A first ring terminal fixed to the housing, a second signal line coupled to the one end, and the other end protruding from the inner wall of the hole in the one groove contacting the first ring terminal of the earphone plug and the other end inner side; 2 is fixed to the housing so that one end of the pair of support grooves is inserted into the other groove and protrudes outward through the hole bottom, and a third signal line is coupled to the one end, and protrudes into the hole inner wall in the other groove. A second ring terminal of which the other end is in contact with the second ring terminal of the earphone plug, and the ring and the housing are inserted and fixed, and a fourth signal line is coupled, and the ring And a pipe-like sleeve terminal for connecting an electric signal, and the remaining portion other than the insertion of the earphone plug, characterized in that it includes an insulating cover covering for isolating from the outside.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 3 is a partially cutaway perspective view of a four-pole mold earphone jack according to the present invention, Figure 4 is an exploded perspective view, Figure 5 is a perspective view of the bottom surface of the housing.

3 and 4, the earphone jack 100 of the present invention has a cylindrical insulating housing 110, a ring 120, a tip terminal 130, a first ring terminal 140, and a second ring terminal 150. ), A sleeve terminal 160, an elastic member 170, an insulating cover 180.

The housing 110 is formed of first and second support groove pairs 112 and 114 facing each other in the longitudinal direction on the inner wall of the hole 111 by a cylindrical insulating material. A first through hole 113 is formed in the center of the bottom surface of the housing 110, and a pair of through holes 115 extending from the respective grooves of the second support groove pair 114 is formed in the periphery thereof. At the bottom of the outer surface of the housing 110, a pair of locking jaws 116 formed to face each other is formed.

The ring 120 is made of a metal conductor, and the locking jaw 123 is formed at the inlet side of the insertion hole 122, and two grooves 124 and 126 are formed at the outer surface. The insertion hole side diameter of the ring 120 has a size with a + tolerance to the diameter of the sleeve terminal portion of the plug to be inserted. The diameter after the locking step of the insertion hole 122 of the ring 120 has a size larger than the diameter of the inlet side.

The elastic member 170 has a gap 172 between both ends of the metal piece in a ring shape with one side open. Three protrusions 174 protruding inwardly are formed on side surfaces of the elastic member 170.

The elastic member 170 is inserted from the rear of the insertion hole 122 of the ring 120 is disposed on the inner wall of the ring 120 and is supported by the locking jaw 123 not to fall forward.

The tip terminal 130 is formed of a metal conductor in the form of a two finger window having a stem portion 132 and a pair of branch portions 134 and 136 branched to both sides from the stem portion 132, respectively. The tip terminal 130 is inserted from the inlet of the hole 111 of the housing 110 and the branch portions 134 and 136 are respectively inserted into the first support groove pair 112 formed on the inner wall of the hole, and the stem portion 132 is inserted into the tip terminal 130. It is fixed to the housing 110 to penetrate through the through-hole 113 formed in the bottom of the hole to project outward. The first signal line 204 of the cable 200 is soldered to and coupled to the end of the stem 132 of the tip terminal 130. Inner ends of the branch portions 134 and 136 of the tip terminal 130 contact the recesses of the head of the tip terminal of the earphone plug.

The first ring terminal 140 is a metal plate in which the middle portion 144 is bent in a crank shape, and includes a terminal portion 142 extending forward from the middle portion 144 and a soldering portion 146 extending rearward.

The second ring terminal 150 is a metal plate in which the middle portion 154 is bent in a crank shape, and includes a terminal portion 152 extending forward from the middle portion 154 and a soldering portion 156 extending rearward.

The length of the terminal portion 142 of the first ring terminal 140 has a length such that its end is in contact with the first ring terminal of the plug inserted into the housing hole, and the terminal portion 152 of the second ring terminal 150. The length of is such that its end is in contact with the second ring terminal of the plug inserted into the housing hole.

Therefore, the length of the terminal portion 142 of the first ring terminal 140 is longer than the length of the branch portion 134 of the tip terminal 9130, and the length of the terminal portion 152 of the second ring terminal 150 is the first length. It is longer than the length of the ring terminal 140.

The first ring terminal 140 and the second ring terminal 150 are made integral with each other by the bridge BR. They are inserted forward through the through hole 115 formed in the bottom of the housing 110 until the bent portion of the middle portion is caught by the locking jaw formed in the bottom of the housing. The terminal portion 142 of the first ring terminal 140 is inserted into one groove of the second support groove pair 114, and the terminal portion 152 of the second ring terminal 150 is inserted into the other groove to be supported. . After the insertion is completed, the bridge BR is removed by punching so that the first ring terminal 140 and the second ring terminal 150 are electrically separated from each other. Such a structure in which the first ring terminal and the second ring terminal are separated after assembling improves the assemblability compared to assembling separately.

The second signal line 206 of the cable 200 is soldered to the soldering portion 146 of the first ring terminal 140, and the third signal line 202 is soldered to the soldering portion 156 of the second ring terminal 150. ) Is soldered and joined.

The sleeve terminal 162 has a metal pipe shape and has two long holes 162 facing each other in the circumferential direction at the rear end thereof. The housing 110 and the ring 120 are inserted into the sleeve terminal 162, and the front end portion of the sleeve terminal 162 is punched into the groove 126 of the ring 120 and bent and coupled to each other. The end is bent by punching and coupled to the locking projection 116 of the housing 110 to fix the housing 110 and the ring 120.

Accordingly, the sleeve terminal of the plug is electrically connected to the sleeve terminal 160 through the ring 120. The ground wire 208 of the cable 200 is soldered to and coupled to the rear end of the sleeve terminal 160.

As such, the first ring terminals and the second ring terminals are assembled to the housing, and the ring and the housing are fixed by the sleeve terminals, and then each signal line of the cable is soldered to each terminal portion, and then molded into the insulating cover 180. . The tip of the insulating cover 180 is tightly coupled by the grooves 124 and 126 of the ring 120 and completely covers the soldering portion to prevent the soldering portion from being electrically shorted or falling off by physical external force.

FIG. 6 is a cross-sectional view taken along the line A-A of FIG. 3, and FIG. 7 is a cross-sectional view taken along the line B-B of FIG. FIG. 8 is a cross-sectional view taken along the line C-C of FIG. 6, FIG. 9 is a cross-sectional view taken along the line D-D of FIG. 7, and FIG. 10 is a cross-sectional view taken along the line E-E of FIG.

Referring to these cross-sectional views, when the four-terminal plug 300 is inserted into the earphone jack 100, the tip terminal 310 of the plug contacts the recesses of the glans by the branches 134 and 136 of the tip terminal 130. The first ring terminal 320 is in contact with the tip of the terminal portion 142 of the first ring terminal 140, and the second ring terminal 330 is the tip of the terminal portion 152 of the second ring terminal 150. The sleeve terminal 340 is contacted by the inlet of the ring 120 and the protrusion 174 of the elastic member 170.

Since the elastic member 170 pushes the protrusion 174 outward when the plug is inserted, the elastic member 170 is in close contact with the inner wall of the ring 120 to improve electrical contact of the sleeve terminals, thereby reducing contact resistance. In addition, since the plug is firmly gripped by the restoring force of the elastic member 170, the plug holding force of the jack 100 is increased.

In the above-described embodiment of the present invention has been described with respect to the earphone jack in which the plug having a 2.5mm aperture is inserted, not only 2.5mm due to the proportional reduction of dimensions, but also very easily by those skilled in the art for apertures of 2.5mm or more and below. It will be possible.

In the present invention, the tip terminal is inserted from the front, and the first and second ring terminals are inserted from the rear to exemplify the assembly, but the present invention is not limited to this, it is also possible to assemble by inserting both from the rear.

As described above, the present invention has been described with reference to a preferred embodiment of the present invention, but those skilled in the art can vary the present invention without departing from the spirit and scope of the present invention described in the following Utility Model Registration Claims. It will be understood that modifications and changes can be made.

As described above, in the present invention, in the earphone jack provided at the end of the extension cord of the earphone, the cord configuration of the earphone having the 4-pole earphone plug is possible by configuring the terminal to enable the 4-pole connection. It is possible to have four poles while maintaining the external dimensions of the existing three-pole earphone jack, so that the appearance of the earphone jack is beautiful and miniaturized.

Claims (3)

In the four-terminal earphone jack is inserted a four-terminal earphone plug in which the tip terminal, the first ring terminal, the second ring terminal and the sleeve terminal are sequentially arranged coaxially, A cylindrical housing made of an insulating material having a hole into which the earphone plug is inserted, and having first and second support groove pairs extending in a longitudinal direction and facing each other on an inner wall of the hole; A ring disposed on the same center line with the housing on the hole inlet side of the housing and in contact with the sleeve terminal of the earphone plug; It is formed in the form of a two finger with a stem portion and a pair of branch portions branched from both sides of the stem portion, respectively, the branch portion is inserted into the first support groove pair is supported, the stem portion penetrates through the hole bottom to the outside A tip terminal fixed to the housing such that a first signal line is coupled to an end of the stem portion, and inner ends of each of the branch portions contact a main portion of a tip terminal of the earphone plug; Is inserted into one of the pair of the second support groove is fixed to the housing so that one end is projected to the outside through the bottom of the hole, the second signal line is coupled to the one end, protrudes into the hole inner wall in the one groove A first ring terminal having the other end contacted with the first ring terminal of the earphone plug and the other end inside thereof; Is inserted into the other one of the pair of the second support groove is fixed to the housing so that one end penetrates through the hole bottom to the outside, a third signal line is coupled to the one end, and the other inner groove into the hole inner wall A second ring terminal protruding the other end of which the other end of the earphone ring contacts the second ring terminal; A pipe-type sleeve terminal for inserting and fixing the ring and the housing, and having a fourth signal line coupled thereto and for connecting an electrical signal to the ring; And Earphone jack, characterized in that provided with an insulating cover coated to insulate the remaining parts other than the insertion port of the earphone plug from the outside. The earphone jack of claim 1, wherein an inner diameter of the earphone jack is about 1.5 mm or more and 2.5 mm or less. The method of claim 1, wherein the first ring terminal and the second ring terminal is integrally formed by a bridge formed in each end portion exposed to the outside of the housing, and after being assembled to the housing is electrically separated from each other by removal of the bridge Earphone jack, characterized in that.