KR200167236Y1 - Smallest diameter multi-pole plug - Google Patents

Abstract

The present invention relates to a minimum diameter multi-pole plug, and in particular, the plug of the present invention has a terminal portion inserted into a jack having a plurality of contact terminals, such as a tip, at least one ring, a sleeve, and the like, and corresponds to the plurality of contact terminals, respectively. In the smallest diameter multipole plug including a gripping portion for sealing a plurality of soldering terminals to which electric wires are soldered, the outermost circumference of the locking jaw located between the tip of the tip and the locking groove has a positive tolerance compared with the standard specification. Therefore, in the present invention, since the outer diameter of the tipping jaw of the tip has a positive tolerance compared to the standard specification, the terminal contact force is improved when the jack is inserted into the jack, thereby reducing the occurrence of noise due to poor contact, and is not easily removed from the jack by shaking.

Description

Smallest Diameter Multi-pole Plug

The present invention relates to a minimum diameter multi-pole plug, and more particularly, to a multi-pole plug having a minimum diameter which is excellent in terminal contactability when inserted into a jack, and thus does not generate noise due to poor contact and does not fall well in fluctuation of a cord.

Recently, as the ultra-light weight, miniaturization and slimming of personal handheld devices such as cellular telephones have been competitively advanced, small diameters of the plugs from 3.5 mm small plugs to 2.5 mm ultra small plugs are being advanced.

The 3.5 mm small plug has a length of 14 mm inserted into the jack, and has been mainly used for portable audio equipment such as stereo earphones of an FM radio receiver or stereo earphones of a portable cassette tape recorder. This 3.5mm small plug is mainly composed of three poles to enjoy stereo music, but recently, the technology of adopting the remote control in the middle of the earphone wire to improve the versatility and portability of the portable cassette tape recorder has been developed. The number of poles of the mm small 3-pole plug is multipolar to 4 poles, 5 poles, 6 poles, and the like.

The miniature 2.5mm plug inserts 11mm into the jack and is used for handsfree ear microphones in cell phones. Therefore, the tip is used as the earphone terminal, the ring is the microphone terminal, the sleeve is used as a ground terminal.

The specification of the 2.5 mm 3-pole plug is standardized as shown in FIG.

That is, the diameter of the tip 10a of the tip 910 is 0.8mm, the outermost diameter of the locking jaw 10c is 2.3 ± 0.05mm, the innermost diameter of the locking groove 10e is 1.8 ± 0.1mm, and the end 10g. Has a diameter of 2.3 ± 0.1 mm, an outer diameter of the contact terminal 12a of the ring 12 is 2.5 ± 0.05 mm, and a diameter of the contact terminal 14a of the sleeve 14 is 2.5 ± 0.05 mm. The length from the tip 10a of the tip 10 to the top of the locking jaw 10c is 0.7 ± 0.1mm, the length from the top of the locking jaw 10c to the locking groove 10e is 2.3mm, and the locking groove 10e To end 10g is 0.4 mm in length, end 10g is 0.4 mm in width, and therefore the total length from tip 10a to tip 10g of tip 10 is 3.8 mm. The spacing of the insulating ring 10h between the tip 10 and the ring 12 is 0.7 ± 0.1 mm, the width of the ring contact terminal 12a is 1.8 mm, and the ring contact terminal 12a and the sleeve contact terminal 14a are The interval between the insulating rings 12b is 0.7 ± 0.1 mm, and the length from the tip of the sleeve contact terminal 14a to the flange 14b is 4 ± 0.1 mm. The inclination of the inclined surface 10b to the top of the tip 10a of the tip 10 and the top of the locking jaw 10c is defined as 45 ° ± 1 °.

As the plug transitions from 3.5mm small to 2.5mm ultra small, as well as the plug of the cell phone's hands-free ear microphone, the product's light weight and slimness are not only used in portable digital audio recorder using flash memory such as MP3 player. I want to use a miniature plug that is 2.5mm or less.

However, in the cellular phone, the voice transmission is the main purpose, so even the mono system does not have a big problem, but the digital audio recording and playback apparatus requires not only the recording of the voice but also the audio in stereo, so that a plug of 4 or more poles is required. In addition, power lines and control signal lines are required to control the set with the remote control.

However, in the 2.5mm plug, since the diameter is very small, forming four or more poles requires technical precision because it requires ultra-precision processing technology.

Typically, the plug is formed using an insert method in which the tip, ring and sleeve parts are assembled and installed in the insert mold, and the tip, ring and sleeve are electrically insulated from each other by injecting a plastic insulating mold from the outside into the mold. . In this insert process, the tip of the tip and the flange of the sleeve can be supported in the mold, but a ring disposed between them supports the ring by providing a step between the outer diameter of the tip and the outer diameter of the sleeve to support the mold. Therefore, increasing the number of rings to increase the number of poles increases the number of these steps.

However, since the permissible range between the outer diameter of the tip and the outer diameter of the sleeve is very narrow (0.2 mm in a 2.5 mm ultra-small plug), it is very difficult to cut and form several steps within 0.2 mm. Therefore, in the standard, the maximum outer diameter of the tip is set to 2.3 ± 0.1 mm in order to easily form the step of the ring.

Therefore, the diameter of the outermost circumference of the engaging jaw where the tip and the engaging groove meet may have a positive tolerance because the 2.5 mm plug forms a recess and a tip by cutting a rod-like material having a diameter of 2.3 ± 0.1 mm. There will be no. In other words, it has a negative tolerance of 2.3-0.05mm.

Therefore, the 2.5mm plug with the existing standard specification has a negative tolerance due to the cutting method, so that the contact with the spring terminals installed in the jack is inferior when it is inserted into the jack, so the tension is weakened, and the cord is easily released by the shaking of the cord. And noise caused by poor contact.

In addition, in the related art, in order to increase the number of poles due to such technical difficulties, the pole has a 2.5mm three-pole stereo plug, and further includes an annular terminal around the sleeve to configure four poles.

The first object of the present invention is to improve the contact force with the jack by having a positive tolerance of the outermost tolerance of the tipping jaw of the tip in order to solve such a problem of the prior art and to reduce the noise due to poor contact with a solid contact force It is to provide a minimum diameter multi-pole plug that can eliminate the phenomenon.

The second object of the present invention is to provide a rod type 2,5mm 4-pole plug for the first time in the world.

A third object of the present invention is to provide a 2.5 mm 5-pole plug with an annular terminal added to a rod-type 2,5 mm 4-pole plug.

The fourth object of the present invention is to provide the world's first 1.8mm 3-pole plug.

The fifth object of the present invention is to provide the world's first 1.5mm 3-pole plug.

1 is a view showing a standard specification of a conventional 2.5mm 3-pole plug.

Figure 2 is a view for explaining the standard of the 2.5mm 4-pole plug according to the present invention.

Figure 3 is a cross-sectional view for explaining the insert mold for injecting the insulation of the 2.5mm 4-pole plug according to the present invention.

Figure 4 is a partially cutaway perspective view of a first embodiment of a 2.5mm 4-pole plug according to the present invention.

5 is a perspective view of a second embodiment of a 2.5 mm 4-pole plug according to the present invention;

6 is a perspective view of a third embodiment of a 2.5 mm 4-pole plug according to the present invention;

7 is a perspective view of a 2.5mm 5-pole plug according to the present invention.

8 is a perspective view of a 1.8mm three-pole plug according to the present invention.

9 is a view for explaining the standard of the 1.8mm 3-pole plug according to the present invention.

10 is a perspective view of a 1.5mm three-pole plug according to the present invention.

11 is a view for explaining the standard of the 1.5mm 3-pole plug according to the present invention.

12 is a view showing the configuration of a hands-free ear microphone of the cellular phone to which the plug of the present invention is applied.

Explanation of symbols on the main parts of the drawings

20; Tips 22, 32, 42, 52; Contact terminal

24, 34, 44, 56: soldering terminal 30: first ring

40: second ring 50: sleeve

54 flange 60 insulation material

100: contact terminal support 110: support stand

120: cover

In order to achieve the above object, the minimum diameter multi-pole flag of the present invention includes a terminal portion inserted into a jack having a plurality of contact terminals such as a tip, at least one ring or a sleeve, and a wire corresponding to each of the plurality of contact terminals. In the smallest diameter multipole plug including a gripping portion for sealing a plurality of soldering terminals to be soldered, the outermost circumference of the locking jaw located between the tip of the tip and the locking groove has a positive tolerance compared to the standard specification. .

Here, in order to form a positive tolerance, the tip preferably forms the locking jaw and the locking groove by cutting from a rod-shaped material of at least 2.4 mm or more, and the end diameter is preferably 2.4 mm.

The outer diameter of the ring is preferably at least 2.45 mm to 2.5 mm and the outer diameter of the sleeve is preferably 2.5 mm or more.

In addition, the present invention includes a first ring and a second ring between the tip and the sleeve to form a 2.5mm 4-pole plug.

And it is characterized by further comprising an annular contact terminal disposed around the flange of the sleeve to form a 2.5mm 5-pole plug.

Further, in the present invention, a wave is formed by sealing a terminal portion inserted into a jack with a plurality of contact terminals such as a tip, at least one ring, a sleeve, and the like, and a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are soldered, respectively. A minimum diameter multipole plug comprising branches, wherein the diameter of the plug is 1.8 mm.

Further, in the present invention, a wave is formed by sealing a terminal portion inserted into a jack with a plurality of contact terminals such as a tip, at least one ring, a sleeve, and the like, and a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are soldered, respectively. A minimum diameter multipole plug comprising branches, wherein the diameter of the plug is 1.5 mm.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention in detail as follows.

Figure 2 shows a view for explaining the standard of the 2.5mm 4-pole plug according to the present invention. Figure 3 shows a cross-sectional view for explaining the insert mold for injecting the insulation of the 2.5mm 4-pole plug according to the present invention. Figure 4 shows a partially cutaway perspective view of a first embodiment of a 2.5mm 4-pole plug according to the present invention.

2 to 4, the plug of the present invention includes a tip 20, a first ring 30, a second ring 40, and a sleeve 50.

The tip 20 includes an Ω-shaped contact terminal 22 inserted into the jack and contacting the jack terminal and a 0.4 mm rod solder terminal 24 extending rearward from the contact terminal 22.

The contact terminal 22 of the tip 20 has a tip 22a, a first inclined surface 22b, a locking jaw 22c, a second inclined surface 22d, a locking groove 22e, a third inclined surface 22f and a terminal end. (22g). The outer diameter of the latching jaw 22c is preferably 2.3 + 0.03 mm, with a positive tolerance of 0.03 mm. The end 22g maintains the diameter of the raw material at 2.4 mm. Therefore, in the present invention, since the tip 20 cuts the bar-shaped material of 2.4 mm to form the locking jaw 22c and the locking groove 22e, the tip diameter of the locking jaw 22c has a positive tolerance at 2.3 mm. It is possible to process. However, from the 2.3 mm rod-shaped material, it is impossible to process the outer diameter of the locking jaw to have a positive tolerance at 2.3 mm, and thus have a negative tolerance. Therefore, the outer diameter of the tip catching jaw of the present invention and the outer diameter of the conventional tip catching jaw will be at least about 0.06 mm.

The difference in the outer diameter of the locking step increases the contact force with the terminals of the jack when inserted into the jack can prevent the occurrence of noise due to poor contact or the plug can be easily pulled out from the jack.

The solder terminal 24 of the tip 20 is machined into a tapered shape by a distance from the end of the contact terminal 22, and then processed into a diameter of 0.4 mm. The tapered portion of the solder terminal 24 is for preventing the solder terminal 24 from breaking from the end of the contact terminal 22.

As described above, the tip 20 of the present invention may process the contact terminal 22 and the solder terminal 24 integrally, or after processing the contact terminal first, a 0.4 mm steel bar is formed at the end of the contact terminal. It can also be configured by inserting into the insertion hole by punching. The latter tip method is preferred in terms of mass production and yield.

The first ring 30 includes a ring-shaped contact terminal 32 having an outer diameter of 2.45 mm to 2.5 mm and a pipe-type solder terminal 34 having a 1.1 mm outer diameter extending rearward from the end of the contact terminal 32. do. The first ring 30 is spaced a predetermined distance from the end of the tip 20, for example 0.7 mm, and is disposed outside the solder terminal 24 of the tip 20. The total length of the first ring 30 is shorter than the total length of the solder terminal 24 of the tip 20 so that the soldered portion of the end portion of the solder terminal 24 of the tip 20 is sufficiently exposed. The first ring 30 should have an outer diameter larger than the outer diameter of the end of the tip 20 to be supported in the mold during the insert process of the insulating material.

The second ring 40 includes a ring-shaped contact terminal 42 having an outer diameter of 2.5 mm or more and a pipe-type solder terminal 44 having a 1.8 mm outer diameter extending rearward from the end of the contact terminal 42. The second ring 40 is spaced apart from the end of the contact terminal 32 of the first ring 30 by a predetermined distance, for example, 0.7 mm, and is disposed outside the solder terminal 34 of the first ring 30. The total length of the second ring 40 is shorter than the total length of the soldering terminal 34 of the first ring 30 so that the soldered portion of the end portion of the soldering terminal 34 of the first ring 30 is sufficiently exposed. The second ring 40 should have an outer diameter larger than the outer diameter of the contact terminal of the first ring 30 to be supported in the mold during the insert process of the insulating material.

The sleeve 50 has a pipe-type contact terminal 52 having the same outer diameter as the ring-shaped contact terminal 42 of the second ring 40, a flange 54, and a pipe-type solder terminal extending rearward of the flange 54. And 56. The flange 54 defines the final end of the plug that is inserted into the jack. The total length of the sleeve 50 is shorter than the total length of the solder terminal 44 of the second ring 40 so that the soldered portion of the end portion of the solder terminal 44 of the second ring 40 is sufficiently exposed. The sleeve 50 is supported by a flange in the mold during the insert process of the insulating material.

The tips 20, the first ring 30, the second ring 40, and the sleeve 50 of the 2.5 mm four-pole plug of the present invention configured as described above in turn have a solder terminal 24 of the tip 20. ) Into the insert mold of FIG. 3. The insert mold is composed of a contact terminal supporter 100, a support 110, and a cover 120.

First, when the assembly of the four-pole terminals is mounted in the support through hole 102 formed in the contact terminal support 100, the tip 20 is supported by the inclined surface of the support through hole 102. The front end of the contact terminal 32 of the first ring is supported by the first step 104 of the support ring 102 of the first ring 30. The tip of the contact terminal 42 of the second ring is supported by the second step 106 of the support hole 102. The front end of the flange 54 is supported by the sleeve 50 at the periphery of the support hole 102. Therefore, the tip and the first ring are separated by 0.7 mm, the first ring and the second ring are separated by 0.7 mm, and the second ring and the sleeve are separated by 0.5 mm from the contact terminal support 100. Will be supported.

The support hole 102 of the contact terminal support 100 is reamer corresponding to the outer diameter and length of each of the contact terminals 22, 32, 42 and 52 of the tip, the first ring, the second ring and the sleeve. Processed. For example, the inner diameter (a) of the locking jaw portion of the tip is processed to 2.325-2.23 mm, depth 2.55 mm, and the end portion (b) of the tip is processed to an inner diameter of 2.415-2.42 mm and a depth of 2.0 mm. Subsequently, the contact terminal portion c of the first ring is machined to an inner diameter of 2.475 to 2.48 mm and a depth of 2.5 mm, and the contact terminal portion d of the second ring and sleeve is processed to an inner diameter of 2.545 to 2.55 mm and a depth of 4.05 mm. do.

As such, the contact terminal supporter 100 into which the plug assembly is inserted is inserted into the groove 112 of the pedestal 110. Thus, the ends of the solder terminals of the sleeve and the tip are respectively supported by the pedestal.

When the pedestal 120 is covered by the cover 130, the upper half of each of the solder terminals 56 and 24 of the sleeve and the tip is interviewed and supported on each corresponding surface formed on the cover. End portions of the solder terminals 34 and 44 of the first ring and the second ring are supported by the protrusions 122 and 124, respectively.

As such, when the plug assembly is fixed in the insert mold and then the insulating material 60 is injected into the space in the mold through the gate, the insulating material is injected through the space formed between these assemblies to electrically insulate the respective terminals.

As shown in FIG. 4, the four terminals are electrically insulated from each other and mechanically fixed by a single insulation insert process to form a plug structure.

Therefore, the insulating material 60 is formed integrally. The front of the flange 54 of the sleeve 50 is the contact terminal 22 of the tip 20, the insulating ring 60a, the contact terminal 32 of the first ring 30, the insulating ring 60b, the second ring A rod-shaped plug insertion portion in which the contact terminal 42 of the 40, the insulating ring 60c, and the contact terminal 52 of the sleeve 50 are sequentially arranged is formed. Behind the flange 54 of the sleeve 50, the sleeve solder terminal 56, the solder terminal 44 of the second ring 40, the solder terminal 34 of the first ring 30, the tip 20 Solder terminals 24 are exposed in steps. A wire corresponding to each exposed solder terminal, such as a ground wire for the solder terminal 56 of the sleeve, a microphone wire for the solder terminal 44 of the second ring, and an R wire for the solder terminal 34 of the first ring, The solder wire 24 of the tip is connected to the L wire by soldering. In addition, the solder wire 56 of the sleeve has a ground wire, the solder wire 44 of the second ring has a control wire, the solder wire 34 of the first ring has a microphone wire, and the solder terminal 24 of the tip has earphones. The lines can each be connected by soldering.

In this way, after the wires corresponding to the respective solder terminals are connected by soldering, the soldering portions are molded by an insulating material, and finally, an insulating cap is covered to form a gripping portion.

Figure 5 shows a perspective view of a second embodiment of a 2.5mm 4-pole plug according to the present invention. The plug of FIG. 5 has a structure of slimming the holding part by reducing the stepped structure of the four-stage soldering terminals of the plug of FIG. 4 to a three-stage configuration. In other words, by cutting a part of the solder terminal of the sleeve to expose the solder terminal of the second ring to the portion facing the sleeve soldering portion to form a soldering portion of the sleeve and the second ring in the same layer, the four-stage configuration The structure made into a structure is shown.

Figure 6 shows a perspective view of a third embodiment of a 2.5mm 4-pole plug according to the present invention. In FIG. 6, a portion of the solder terminal of the second ring is cut to expose the solder terminal of the first ring to a portion opposite the solder portion of the second ring, thereby forming solder portions of the second ring and the first ring in the same layer. The structure which made the 4-stage structure the 3-stage structure by this is shown.

The plug structures of the second and third embodiments as described above shorten the length of the gripping portion relative to the length of the insertion portion, thereby moving the center of gravity of the plug toward the jack when inserted into the jack, thereby improving terminal contactability and reducing noise. have.

Figure 7 shows a perspective view of a 2.5mm 5-pole plug according to the present invention. The 5-pole plug of FIG. 7 further includes an annular terminal 70 outside the flange 54 of the sleeve 50 to form a 2.5-mm 5-pole plug. Next, the pole is composed of 5 poles for stereo configuration and remote control.

Figure 8 shows a perspective view of a 1.8mm three-pole plug according to the present invention, Figure 9 shows the specification of a 1.8mm three-pole plug according to the present invention. The 1.8 mm 3-pole plug is the first in the world to be proposed by the applicant, as far as not in standard specifications.

As shown in FIG. 9, the 1.8 mm three-pole plug has an outer diameter of the locking jaw 212a of the tip 210 at 1.7 mm, an outer diameter of the locking groove 212b at 1.2 mm, and a ring 220 and a sleeve. The outer diameter of 230 is 1.8 mm. Therefore, as the outer diameter decreases, when the diameter is reduced to 1.8 mm while leaving the length as it is in the 2.5 mm standard, the inclination of the inclined surface between the engaging jaw 212a and the engaging groove 212b is lowered. Therefore, since the tension caused by the locking jaw is reduced when the jack is inserted into the jack, a problem of easily coming off occurs. Therefore, in the present invention, in order to solve such a problem, the distance between the tip of the tip 210 and the locking jaw 212a is lengthened, and the distance between the locking jaw 212a and the locking groove 212b is reduced. By increasing the slope of the inclined surface between the jaw 212a and the locking groove 212b, the structure of the tip 210 is improved so that sufficient tension is applied when the jack is inserted into the jack.

The diameter of the soldering terminal 214 of the tip 210 in the 1.8mm three-pole plug is 0.4mm, the outer diameter of the soldering terminal 224 of the ring 220 is 1.1mm and the inner diameter is 0.8mm. Therefore, the thickness of the solder terminal 224 of the ring 220 has a thickness of 0.15mm. The spacing between the solder terminal 214 of the tip 210 and the solder terminal 224 of the ring 220 is maintained at 0.2 mm. The inner diameter of the contact terminal 232 of the sleeve 230 is configured to 1.5mm to form a thickness of 0.15mm. The spacing between the solder terminal 224 of the ring 220 and the contact terminal 232 of the sleeve 230 is maintained at 0.2 mm. Accordingly, the insulating material 240 is injected through a 0.2 mm gap to contact the insulating ring 240a and the ring 220 between the contact terminal 212 of the tip 210 and the contact terminal 222 of the ring 220. An insulating ring 240b is formed between the terminal 222 and the contact terminal 232 of the sleeve 230.

In an embodiment of the 1.8 mm three-pole plug, a portion of the solder terminal 236 of the sleeve 230 is cut to expose the solder terminal 224 of the ring 220 in the same layer to reduce the length of the grip portion. Has However, the sleeve. The soldering part of the ring and tip can be configured in three stages. In addition, it is also possible to improve the tension by configuring the tip in an Ω shape instead of forming a taper shape. The soldering terminal of the tip may be formed integrally with the contact terminal by cutting, or a method of forming an insertion hole in the end of the contact terminal and then driving a 0.4 mm steel bar by punching.

Figure 10 shows a perspective view of a 1.5mm three-pole plug according to the present invention, Figure 11 shows the specifications of the 1.5mm three-pole plug according to the present invention. The 1.5 mm three-pole plug is the first in the world to be proposed by the applicant, as far as not in standard specifications.

As shown in FIG. 11, the 1.5 mm three-pole plug has an outer diameter of the engaging jaw 312a of the tip 310 as 1.4 mm, an outer diameter of the engaging groove 312b as 1.0 mm, and a ring 320 and a sleeve. The outer diameter of 330 is 1.5 mm. The distance between the tip of the tip 310 and the locking jaw 312a is 1.2mm, and the distance between the locking jaw 312a and the locking groove 312b is 1.2mm, so that the locking jaw 312a and the locking groove 3 The slope of the inclined surface between 312b) is increased to improve the structure of the tip so that sufficient tension is applied when inserted into the jack.

The diameter of the soldering terminal 312 of the tip 310 in the 1.5mm three-pole plug is 0.3mm, the outer diameter of the soldering terminal 324 of the ring 320 is 0.9mm and the inner diameter is 0.6mm. Therefore, the thickness of the solder terminal 324 of the ring 320 has a thickness of 0.15mm. The spacing between the solder terminal 314 of the tip 310 and the solder terminal 324 of the ring 320 is maintained at 0.15 mm. The inner diameter of the contact terminal 332 of the sleeve 330 is composed of 1.2mm to form a thickness of 0.15mm. The spacing between the solder terminal 324 of the ring 320 and the contact terminal 332 of the sleeve 330 is maintained at 0.15 mm. Accordingly, the insulating material 340 is injected through a gap of 0.15 mm to form an insulating ring 340a between the tip 310 and the ring 320 and an insulating ring 340b between the ring 320 and the sleeve 330. do.

In one embodiment of the 1.5 mm 3-pole plug, a portion of the solder terminal 336 of the sleeve 330 is cut to expose the solder terminal 324 of the ring 320 in the same layer to reduce the length of the grip portion. Has However, the sleeve. The soldering part of the ring and tip can be configured in three stages. In addition, it is also possible to improve the tension by configuring the tip in an Ω shape instead of forming a taper shape. The soldering terminal of the tip may be formed integrally with the contact terminal by cutting, or a method of forming an insertion hole in the end of the contact terminal and then driving a 0.4 mm steel bar by punching.

12 shows the structure of a handsfree ear microphone of a cellular phone employing a minimum diameter plug according to the present invention. As shown, the handsfree ear microphone includes a plug 410, a microphone 420, and an earphone 430. In the present invention, by forming a four-pole bar from a 2.5mm diameter plug, a remote control or stereo function can be realized, and a 1.8mm and 1.5mm diameter plug can be commercially mass-produced to enable the production of portable electronic devices such as cell phones. It can contribute to slimming and small size and light weight.

As described above, in the present invention, the tolerance of the tipping jaw is positively formed, thereby increasing the tension compared to a plug having a negative tolerance, thereby improving contact with terminals of the jack, thereby generating noise due to poor contact. It is reduced and does not fall out well.

In addition, the size of the corresponding jack can be reduced by providing the insert 2.5 mm 4-pole or 5-pole plug of the insert method for the first time in the world, thereby contributing to light and small size of the portable device.

Moreover, the world's first 1.8mm and 1.5mm three-pole stereo plugs can be developed as inserts and offered as plugs for hands-free ear microphones in cell phones, contributing to the miniaturization of cell phones.

The present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (17)

A minimum including a terminal portion inserted into a jack with a plurality of contact terminals, such as a tip, at least one ring, a sleeve, and the like, and a grip portion sealing a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are respectively soldered; In the diameter multipole plug, Minimum diameter multi-pole plug, characterized in that the outermost circumference of the locking jaw located between the tip of the tip and the locking groove has a positive tolerance compared to the standard. 3. The minimum diameter multipolar plug of claim 2, wherein the tip forms the locking jaw and the locking groove by cutting from a rod-shaped material of at least 2.4 mm or more, and the end diameter is 2.4 mm. 3. The minimum diameter multipolar plug of claim 2, wherein an outer diameter of the ring is at least 2.45 mm to 2.5 mm and an outer diameter of the sleeve is 2.5 mm or more. 2. The minimum diameter multipole plug of claim 1 wherein a portion of the solder terminal of the sleeve is cut and the solder terminal of the ring is exposed through the cut to provide the solder portion of the sleeve and the ring in the same layer. A terminal portion having a plurality of contact terminals, such as a tip, a first ring, a second ring, and a sleeve, inserted into a jack, and a gripping portion sealing a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are soldered, respectively. In the minimum diameter 4-pole plug, Minimum diameter 4-pole plug, characterized in that the outermost circumference of the locking jaw located between the tip of the tip and the locking groove has a positive tolerance compared to the standard. The method of claim 5, wherein the tip is formed from the rod-shaped material of at least 2.4mm or more by the cutting jaw and the locking groove and the diameter of the end is 2.4mm, The outer diameter of the first ring is at least 2.45mm to 2.5mm and the outer diameter of the first ring and sleeve is at least 2.5mm, characterized in that the minimum diameter 4-pole plug. 6. The minimum diameter multipolar plug of claim 5, wherein a portion of the solder terminal of the sleeve is cut and the solder terminal of the ring is exposed through the cut to provide the solder portion of the sleeve and the ring in the same layer. The method of claim 5, characterized in that a portion of the solder terminal of the first ring is cut and exposed through the cutout to expose the solder terminal of the second ring to provide solder portions of the first and second rings in the same layer. Minimum diameter multipole plug. A terminal portion having a plurality of contact terminals, such as a tip, a first ring, a second ring, and a sleeve, inserted into a jack, and a gripping portion sealing a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are soldered, respectively. In the minimum diameter 4-pole plug, And an annular contact terminal disposed around the flange of the sleeve. The minimum diameter 5-pole plug of claim 9, wherein the outermost circumference of the locking jaw located between the tip of the tip and the locking groove has a positive tolerance compared to a standard specification. 11. The method of claim 10, wherein the tip is formed from the rod-shaped material of at least 2.4mm or more by the cutting jaw and the engaging groove and the diameter of the end is 2.4mm, The outer diameter of the first ring is at least 2.45mm to 2.5mm and the outer diameter of the first ring and sleeve is at least 2.5mm, characterized in that the minimum diameter 5-pole plug. 10. The minimum diameter 5-pole plug of claim 9, wherein a portion of the solder terminal of the sleeve is cut and the solder terminal of the ring is exposed through the cut to provide the solder portion of the sleeve and the ring in the same layer. 10. The method of claim 9, wherein a portion of the solder terminal of the first ring is cut and exposed through the cutout to expose the solder terminal of the second ring to provide solder portions of the first and second rings in the same layer. Minimum diameter 5-pole plug. A minimum including a terminal portion inserted into a jack with a plurality of contact terminals, such as a tip, at least one ring, a sleeve, and the like, and a grip portion sealing a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are respectively soldered; In the diameter multipole plug, 1.8mm multi-pole plug, characterized in that the diameter of the plug is 1.8mm. 15. A 1.8 mm multi-pole plug according to claim 14, wherein a portion of the solder terminal of the sleeve is cut and exposed through the cut to provide a solder portion of the sleeve and the ring in the same layer. A minimum including a terminal portion inserted into a jack with a plurality of contact terminals, such as a tip, at least one ring, a sleeve, and the like, and a grip portion sealing a plurality of solder terminals to which wires corresponding to the plurality of contact terminals are respectively soldered; In the diameter multipole plug, 1.5mm multi-pole plug, characterized in that the diameter of the plug is 1.5mm. 17. A 1.5 mm multi-pole plug according to claim 16, wherein a portion of the solder terminal of the sleeve is cut and exposed through the cut to provide a solder portion of the sleeve and the ring in the same layer.