KR20150098793A

KR20150098793A - Straight Plug Connector and Accessories Apparatus

Info

Publication number: KR20150098793A
Application number: KR1020140020107A
Authority: KR
Inventors: 김세연
Original assignee: 김세연
Priority date: 2014-02-21
Filing date: 2014-02-21
Publication date: 2015-08-31

Abstract

The straight plug connector of the present invention includes a tip terminal electrically insulated from each other, a plurality of ring terminals, and a sleeve terminal. The plurality of ring terminals constitute at least one ring terminal pair. At least one of the ring terminal pairs corresponds to one ring terminal of the standard audio plug connector. It is therefore compatible with standard audio connectors and it is possible to extend the number of poles to 8 poles.

Description

Straight plug connector and accessories Apparatus

The present invention relates to a plug connector and an accessory device, and more particularly to a plug connector of an accessory device connected to an electric device such as a smart phone.

Manufacturers of electrical devices such as cell phones, smart phones and tablet computers are competing to make them thinner, lighter and smaller in size for ease of use on the go.

In addition, these electric devices are capable of wirelessly communicating data at high speed on the move, thereby controlling not only simple call functions but also accessory devices such as earphones, headphones, chargers, adapters, external antennas and the like through wired / The function as a mobile terminal or a mobile server for mobile terminals is gradually expanding.

Wired interfaces for connecting electrical devices and accessory devices include a bipolar power interface, a 3-pole or 4-pole analog audio signal interface, a 3-pole analog video signal interface, a 4-pole digital data signal interface, and a 2-pole DMB antenna interface .

The number of plug connectors and the number of receptacle connectors must be increased to four or more poles in order to accommodate or accommodate them in a single connector.

The number of plug connectors currently commercialized is four, usually referred to as the TRRS plug. The TRRS plug is standardized with a very small 4-pole plug with a diameter of 2.5 mm and an insertion length of 11 mm and a small plug with a diameter of 3.5 mm and an insertion length of 14 mm.

Figure 1a shows a cross section of a standard 3.5mm four pole audio plug connector. 1, the plug connector 10 includes a tip terminal 12, a first ring terminal 14, a second ring terminal 16, and a sleeve terminal 18, And the insulator 20 is injected and integrated.

However, since the conventional plug structure has a structure in which a plurality of conductor pipes are concentrically arranged for cable connection as shown in FIG. 2, when the number of poles increases by one within the same diameter, the gap increases by two, It is possible to manufacture up to four poles with a 2.5mm plug and up to six poles with a 3.5mm plug. As a result, in order to increase the number of poles, the plug diameter is inevitably increased. In this case, however, the size of the receptacle connector accommodating the plug connector is also increased, which is disadvantageous in reducing the size of the electric device.

Apple has developed a lightning connector, or 8-pin plug connector, similar to the mini USB connector, which is applied to the iPhone 5S.

The flat connector of the USB type deteriorates the engaging force of the male and female connectors due to the pulling force in the lateral direction (the wide direction) rather than the vertical direction (the narrow width direction) on the rectangular plug structure. However, the straight plug connector maintains the same diameter in either the up-and-down direction or the left-to-right direction, thereby maintaining the same male and female connector engagement regardless of the direction.

In addition, flat connectors are not compatible with existing straight plug connectors. Therefore, the conventional electric device has to be provided with a straight type receptacle connector for analog interface such as audio and video, and a flat type receptacle connector for digital interface such as charging and data, respectively.

Accordingly, portable electronic device manufacturers are demanding the emergence of straight plug connectors that are compatible with existing standard audio connectors, but with a greater number of poles, without compromising the lightweight shortening of the product to connect a variety of peripheral electronic devices or accessory devices.

EP 585740, Patent Document 10-2009-0023101 Published patent 10-2012-0137754 [0010]

It is an object of various embodiments of the present invention to provide a new plug connector of a compatible straight type that improves some or all of the drawbacks described above and a method of manufacturing the same.

Embodiments of the present invention are not limited to any particular type of connector and can be used in numerous applications. However, some embodiments are particularly suitable for use as analog connectors, such as audio, video, and high frequency signals, and some embodiments are particularly well suited for digital connectors such as USB 2.0, USB 3.0 data, It is particularly suitable for card connectors.

In view of the disadvantages of presently available audio and data connectors as described above, some embodiments of the present invention provide improved audio and / or audio data having increased number of poles and their corresponding receptacle connectors, Or a data plug connector.

In addition, some embodiments of plug connectors according to the present invention may have reduced lengths and diameters at the same number of poles as existing.

In order to accomplish the above objects, an embodiment of the present invention includes an electrically insulated tip terminal, a plurality of ring terminals, and a sleeve terminal. The plurality of ring terminals constitute at least one ring terminal pair. At least one of the ring terminal pairs corresponds to one ring terminal of the standard audio plug connector. Therefore, one ring terminal of the standard audio connector is compatible with the ring terminal pair, and the number of poles can be increased by at least one. Another embodiment At least one ring terminal pair includes a first ring terminal pair and a second ring terminal pair. The first ring terminal pair corresponds to the first ring terminal of the standard audio plug connector and the second ring terminal pair can correspond to the second ring terminal of the standard audio plug connector. Thus, the number of poles can be increased by two. In yet another embodiment, the contact portion of one ring terminal and the sleeve terminal adjacent to the sleeve terminal of the plurality of ring terminals forms another ring terminal pair. This ring terminal pair corresponds to the contact portion of the sleeve terminal of the standard audio plug connector. Therefore, the number of poles can be increased by three.

Wherein each of the tip terminal and the plurality of ring terminals includes an abutment portion in contact with a corresponding terminal of the force applicator connector and an extension to be brazed with a corresponding electrical wire of the cable. The extension portion is constituted by a conductive metal pipe whose surface is coated with an insulating film, and the front end and the rear end of the extension portion each have an exposed surface for electrical contact. Therefore, since the insulation interval between the extended portions can be made thin with the film thickness, it is possible to increase the number of poles which can not be achieved by the conventional insulator injection method.

In the present invention, the contact portion of each of the plurality of ring terminals may be constituted by a conductive metal ring whose front end face and rear end face are coated with an insulating coating. This makes it possible to maximize the insulation gap between the ring terminals. Here, the conductive metal whose surface is coated with the insulating film can be made of any one of aluminum oxide or aluminum alloy whose surface is anodized.

In the present invention, the size of each of the plurality of outer insulating rings that insulate the opposite ends of the ring terminal pairs is equal to the size of the insulating ring of the standard audio plug connector, and the inner insulating ring Is designed to be smaller than the size of the insulation ring of the standard audio plug connector. This can prevent the off-contact in the divided portion of the ring terminal. The outer insulating ring and the inner insulating ring may be formed of any one of plastic, ceramic, or metal coated with an insulating coating. It is particularly preferable that the inner insulating ring is composed of an insulating coating coated on the end face of the ring-shaped contact portion and the surface of the rear end face of each of the plurality of ring terminals to minimize the size of the inner insulating ring.

In the present invention, the tip terminal may include a through hole penetrating the center, and may include a center terminal in the through hole. Therefore, it is possible to expand the number of poles to a maximum of 8 poles when the center terminal is included. The center terminal is constituted by a conductive metal pipe whose surface is coated with an insulating film, and the front end and the rear end respectively have exposed surfaces for electrical contact.

In other embodiments up to six poles, electrical insulation may be formed by insulators injected between the terminals.

In another embodiment of the present invention, the contact portion of one ring terminal and the sleeve terminal adjacent to the sleeve terminal among the plurality of ring terminals forms one ring terminal pair. This ring terminal pair corresponds to the contact portion of the sleeve terminal of the standard audio plug connector.

Yet another embodiment of the present invention includes a tip terminal electrically isolated from one another, a plurality of ring terminals and a sleeve terminal. The plurality of ring terminals include a first ring terminal pair and a second ring terminal pair, wherein the first ring terminal pair corresponds to the first ring terminal of the standard audio plug connector and the second ring terminal pair corresponds to the standard audio plug connector And corresponds to the second ring terminal. The contact portion of one ring terminal and the sleeve terminal of the plurality of ring terminals adjacent to the sleeve terminal forms a third ring terminal pair and the third ring terminal pair corresponds to the contact portion of the sleeve terminal of the standard audio plug connector.

In the present invention, the center terminal may be provided for connecting a signal having a higher frequency than an audio signal, such as an antenna signal, a high frequency circuit test signal, or a video signal. The tip terminal is preferably provided for connection of a ground signal for shielding the center terminal. Each of the first through third ring terminal pairs may be provided with the same pinout as at least one ring terminal of the standard audio plug connector.

In the present invention, the 8-pole plug connector enables direct data input / output in the memory card communication protocol method without data conversion by the USB communication method.

The accessory device of the present invention includes a straight plug connector of the embodiments described above and a cable electrically connected to the straight plug connector. Here, the accessory device may include an external antenna, a high frequency circuit test device, an earphone, an ear microphone, a headphone, a charger, a memory card adapter, a cable for connecting a PC, a cable for connecting an MP3 player,

The standard audio plug connector of the present invention is preferably a 3.5 mm four pole audio connector. 3.5 mm 2 poles, 3.5 mm 3 poles, 2.5 mm 3 poles, 2.5 mm 4 poles connectors can be easily applied by a simple design change of the ordinary artisan.

The straight plug connector according to the embodiments of the present invention as described above is capable of countering by matching a ring terminal pair to one ring terminal of a standard audio connector, but it is possible to increase the number of poles to a maximum of eight poles. Thus, it is possible to provide a possibility of developing various accessory devices connectable to a smartphone through a single connector. In addition, there is no tolerance, but it is possible to reduce the plug insertion length or diameter at the same number of poles, thereby accelerating the light and shortening of the portable electronic device. In addition, since the plug connector and the receptacle connector can be completely shielded, it is possible to improve the contact quality by solving the interference problem or the contact noise caused by leakage of the high frequency signal at the contact portion. By controlling the insulating structure between the terminals to the thickness of the aluminum oxide film instead of the conventional insulator injection method, the size can be designed with a precision less than the machining tolerance, and the assemblability can be improved.

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned above can be clearly understood by those skilled in the art without departing from the spirit and scope of the present invention.

Figure 1a is a cross-sectional view of a standard 3.5mm four pole audio plug connector.
1B is a sectional view taken along the line AA in Fig.
2 is a cross-sectional view of a preferred embodiment of an eight pole straight plug connector according to the present invention;
3A is a diagram for explaining a correspondence relationship between first through third ring terminal pairs and a 3.5mm 4-pole standard audio receptacle connector;
FIG. 3B is a cross-sectional view of the tip terminal of FIG. 2; FIG.
Figure 3c is a cross-sectional view of the center terminal of Figure 2;
3C is an exploded cross-sectional view of the first ring terminal of Fig.
4 is a view showing an engagement state of an 8-pole plug connector 100 and an 8-pole receptacle connector 200 according to the present invention.
5 is a view showing an engagement state of the 8-pole plug connector 100 of the present invention and the 3.5-mm 4-pole standard audio receptacle connector 30;
6A to 6C are views for explaining various modified embodiments of a seven-pole straight-type blog connector according to the present invention.
7A to 7C are views for explaining various modified embodiments of a six-pole straight-type blog connector according to the present invention.
8 is a view for explaining an earphone accessory device 300 employing a straight 8-pole plug connector 100 of the present invention and an electric device 400 employing a straight 8-pole receptacle connector 200. FIG.
9 is a circuit diagram of a preferred embodiment of the electrical device 400 of FIG.
10A shows an embodiment of a cable accessory device 500 for connecting a display device according to the present invention.
10B shows another embodiment of a cable accessory device 502 for connecting a display device according to the present invention.
11 shows a cable accessory 524 having a male connector 524 at one end of the cable 522 and an eight-pole plug connector 100 of the present invention at the other end, according to an embodiment of the present invention. 520).
12 is a front view of a straight eight-pole plug connector 600 according to another preferred embodiment of the present invention.
Fig. 13A is a rear view of Fig. 12; Fig.
13B is a cross-sectional view taken along the line AA in Fig.
13C is a sectional view of the tip terminal 610 of FIG.
Figure 13d is an exploded view of a preferred embodiment of the flexible printed circuit board 680 of Figure 12;
FIG. 13E is a sectional view taken along the line AA in FIG. 13D. FIG.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Similar reference numerals have been used for the components in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having", etc., are intended to specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, But do not preclude the presence or addition of other features, numbers, steps, operations, elements, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

For a better understanding of the nature and advantages of the present invention, reference will now be made to the following descriptions and accompanying drawings. It should be understood, however, that each of the figures is provided for illustration only and is not intended to define the limits of the scope of the invention. In addition, unless otherwise indicated herein and clearly contradicted by the present disclosure, when elements in different drawings use the same reference numerals, the elements are generally the same or at least similar in function or purpose.

[Example]

2 is a cross-sectional view of a preferred embodiment of a straight 8-pole plug connector according to the present invention.

Referring to the drawings, an eight-pole plug connector 100 includes a tip terminal 110, a first ring terminal pair 120, a second ring terminal pair 130, a third ring terminal pair 140, a sleeve terminal 150 And a center terminal 160. The outer insulating ring 170 includes a first outer insulating ring 172, a second outer insulating ring 174, and a third outer insulating ring 176. A first outer insulating ring 172 is interposed between the tip terminal 110 and the first ring terminal pair 120. A second outer insulating ring 174 is interposed between the first ring terminal pair 120 and the second ring terminal pair 130. A third outer insulating ring 176 is interposed between the second and third ring terminal pairs 130 and 140. The first ring terminal pair 120 includes a first ring terminal 122, a first inner insulating ring 126, and a second ring terminal 124. The second ring terminal pair 130 includes a third ring terminal 132, a second internal insulating ring 136, and a fourth ring terminal 134. The third ring terminal pair 140 includes a fifth ring terminal 142, a third internal insulating ring 146 and a sleeve terminal contact portion 152. The sleeve terminal 150 includes a contact portion 152, a flange 154, and an extension portion 156.

3A is a view for explaining a correspondence relationship between the first through third ring terminal pairs of FIG. 2 and a 3.5mm 4-pole standard audio receptacle connector.

Referring to the drawings, the first ring terminal pair 120 corresponds to the first ring terminal 14 of the 3.5 mm four pole standard audio plug connector 20. The length of the first ring terminal 122 of 1.2 mm, the length of the first inner insulating ring 126 of 0.1 mm and the length of the second ring terminal 124 of 1.2 mm to correspond to the length of 23 mm of the first ring terminal 14 Size. Here, the first inner insulating ring 126 having a thickness of 0.1 mm may be formed to have a total thickness of 50 mu m thick insulating films of the first ring terminal 122 and the second ring terminal 124. [ The second ring terminal pair 130 corresponds to the second ring terminal 16 of the standard audio plug connector 20. The length of the third ring terminal 132 of 1.2 mm, the length of the second internal insulating ring 136 of 0.1 mm, and the length of the fourth ring terminal 134 of 1.2 mm to correspond to the length 23 mm of the second ring terminal 16 The sizes are mapped as a sum. The third ring terminal pair 140 corresponds to the sleeve terminal 18 of the standard audio plug connector 20. The fifth ring terminal 142 of 1.2 mm, the third inner insulating ring 146 of 0.05 mm and the contact portion 152 of the sleeve terminal 150 of 1.25 mm to correspond to the contact length 25 mm of the sleeve terminal 180 The length of the third inner insulating ring 146 is provided as an insulating coating of 50um thickness of the fifth ring terminal 142. [

FIG. 3B is a cross-sectional view of the tip terminal of FIG. 2, and FIG. 3C is a cross-sectional view of the center terminal of FIG.

Referring to the drawings, the tip terminal 110 includes a contact portion 112 and a connection portion 114. The contact portion 112 has an outer circumferential profile between the tip 112a and the rear end 112b equal to the outer circumferential engagement profile of the tip terminal 12 of the 3.5 mm 4 pole standard audio plug connector 20. [ That is, the engaging groove 112c is formed on the outer circumferential surface. A through hole 112d is formed at the center of the contact portion 112a. The leading end 112a is formed with a locking groove 112e and the rear end 112b is formed with a defective groove 112f. The inner diameter of the engaging groove 112e is larger than the inner diameter of the through hole 112d. The extension 114 has an insulating coating 114b formed on the surface of the metal pipe 114a. Preferably, the extension portion 114 is formed by anodizing the surface of an aluminum or aluminum alloy pipe having good conductivity to form an aluminum oxide film having a thickness of 10 to 100 mu m on the surface. A tip end exposed surface 114c is formed at the tip of the extension portion 114 and a tail end exposed surface 114d is formed at the tail end. The leading end exposed surface 114c is forcedly engaged with the coupling groove 114c of the contact portion 112 to form an electrical contact with the contact portion 112. [ The corresponding exposed wire of the cable is soldered to the rear exposed surface 114d.

The center terminal 160 includes a contact portion 162 having a large diameter and a connection portion 164 having a small diameter. The center terminal 160 is coated with the insulating coating 164b except for the contact surface 162a at the tip of the contact portion 162 and the rear end exposed surface 164c of the extension portion 164. Here, it is preferable that the center terminal 160 is integrally formed with the contact portion 162 and the extended portion 164 by forging the aluminum alloy rod 164a having good conductivity. Then, the center terminal 160 is anodically oxidized to cover the aluminum oxide film 164b with a thickness of 10 to 100 mu m.

The center terminal 160 is inserted into the engaging groove 112e of the tip terminal 110 from the rear end and inserted through the through hole 112d and the space portion 114e of the extending portion 114. [ The rear end of the extended portion 164 of the center terminal 160 is assembled so that the rear end exposed portion 164c is exposed outside the rear end of the extended portion 114. [ The contact portion 162 of the center terminal 160 is caught in the engagement groove 112e to prevent the tip terminal 112 from being deviated in the tip direction.

Fig. 3d is an exploded cross-sectional view of the first ring terminal 122 of Fig.

Referring to the drawings, the first ring terminal 122 includes a ring-shaped contact portion 122a and a pipe-like extension portion 122b. The annular contact portion 122a is formed with insulating coatings 122a-3 and 122a-4 on the front end face and the rear end face of the conductive metal ring 122a-1, respectively. An outer peripheral surface 122a-5 of the conductive metal ring 122a-1 is provided as a contact surface. The extended portion 122b is formed by coating the surface of the conductive metal pipe 122b-1 with the insulating coating 122b-2. A leading end exposed surface 122b-3 and a trailing exposed surface 122b-4 are respectively formed at the leading end and the trailing end of the extended portion 122b. The leading end exposed surface 122b-3 of the extended portion 122b is inserted into the central through hole 122a-2 of the ring-shaped contact portion 122a in an interference fit to form an electrical contact. And the corresponding electric wire of the cable is soldered to the rear end exposed surface 122b-4. Here, the ring-shaped contact portion 122a can be manufactured by coating a metal plate having a thickness of 1.2 mm with an anodic oxide film having a thickness of 10 to 100 μm, and then cutting the metal plate with a press cutter. In another embodiment, the metal ring and the metal pipe are combined in the form of a ring terminal, and then the entire surface is anodized to expose the anodic oxide film on the contact surface and the rear exposed surface. In another embodiment, the molten metal may be cast into a ring terminal shape, and then the surface may be anodized to expose the anodic oxide film on the contact surface and the rear exposed surface.

The second ring terminal 124, the third ring terminal 132, the fourth ring terminal 134 and the fifth ring terminal 142 are formed in the inner diameter of the contact portion 122a as compared with the first ring terminal 122 described above. The outer diameter, the inner diameter, and the length size of the extension portion 122b are different from each other, but the overall shape remains similar, so a detailed description will be omitted.

The above-described 3.5 mm 8-pole straight plug connector 100 of the present invention is capable of assembling a plug by assembling each terminal component without a plug injection mold process. After the plug assembly 100 is subjected to the cable soldering process, the cable connection can be completed by a single soldering portion covering injection mold process. It is possible to fabricate a 6-pole, 7-pole or 8-pole plug assembly capable of resonating within a 3.5 mm diameter since the insulation spacing between the extensions of the respective terminals can be assembled within a range of several tens of millimeters.

Fig. 4 shows a state of engagement between the 8-pole plug connector 100 and the 8-pole receptacle connector 200 of the present invention.

Here, the eight-pole receptacle connector 200 is the same as the technical configuration described in the application number ----- filed by the present applicant. As shown in the drawing, it can be seen that the eight terminals of the straight plug connector 100 form a 1: 1 contact with the eight terminals of the receptacle connector 200.

Fig. 5 shows the state of engagement of the 8-pole plug connector 100 of the present invention with the 3.5 mm 4-pole standard audio receptacle connector 30. Fig.

Referring to the drawings, when the plug connector 100 is inserted into and engaged with the 3.5 mm 4-pole standard audio receptacle connector 30, the first terminal 32 contacts the contact portion of the tip terminal 110, and the second terminal 34 Is in contact with the second ring terminal 124 of the first ring terminal pair 120 and the third terminal 36 is in contact with the fourth ring terminal 134 of the second ring terminal pair 130, The fourth terminal 38 is contacted between the fifth ring terminal 142 of the third ring terminal pair 140 and the contact portion 152 of the sleeve terminal 150. [ The fourth terminal 38 contacts between the fifth ring terminal 142 of the third ring terminal pair 140 and the contact portion 152 of the sleeve terminal 150 but the length of the inner insulating ring 146 Is 0.1 mm and the size of the contact of the fourth terminal 38 is 0.1 to 3.0 mm or less. Therefore, it can be seen that the contact is made with both terminals at the same time. That is, when the plug connector 100 is fitted to the 3.5 mm 4-pole standard audio receptacle connector 30, each of the second to fourth terminals 34, 36 and 38 is connected to the first to third ring terminal pairs 120, 130, 140, at least one of the two ring terminals 122, 124, 132, 134, 142, 152 is contacted.

Therefore, the 8-pole plug connector 100 of the present invention is also compatible with the conventional 3.5 mm 4-pole standard audio receptacle connector 30.

6A to 6C are views for explaining various modified embodiments of the seven-pole straight-type blog connector according to the present invention.

6A shows a configuration in which the first ring terminal pair 120 in the eight-pole structure is constituted by one first ring terminal in the conventional standard method and FIG. 6B shows the second ring terminal pair 130 in the eight- 6C shows a configuration in which the third ring terminal pair 140 in the eight-pole structure is constituted by a contact portion of one sleeve terminal of the conventional standard method.

7A to 7C are views for explaining various modified embodiments of the six-pole straight-type blog connector according to the present invention.

FIG. 7A shows a conventional four-pole standard structure in which one first ring terminal is divided into a first ring terminal pair 120, and FIG. 7B shows one conventional ring terminal in a conventional four- And a contact portion of one sleeve terminal is divided into a third ring terminal pair 140 in the existing four pole standard structure.

8 is a view for explaining an earphone accessory device 300 employing a straight 8-pole plug connector 100 of the present invention and an electric device 400 employing a straight 8-pole receptacle connector 200, 8 shows a circuit diagram of a preferred embodiment of the electric device 400 of Fig.

The electric device 400 is a smart phone terminal which is a mobile communication device and has a housing 410 and a display 420 on the front side. A 3.5 mm 8-pole receptacle connector 200, which is one embodiment of the present invention, is mounted on the lower edge of the housing 410. The receptacle connector 200 has a plug insertion groove, and the inlet of the plug insertion groove is coupled to the rim surface of the housing. The electrical device 400 has a receptacle connector 200 that is only one audio / data / power integrated connector.

The circuit of the electric device 400 includes a display 420, a control unit 430, an audio circuit unit 440, and a switching circuit 450. The control unit 430 includes a first short detection unit 431, a second short detection unit 432, a third short detection unit 433, a fourth short detection unit 434, a fifth short detection unit 435, 436, and a determination unit 437. [ The first short detection portion 431 detects a short circuit between the fifth ring terminal 142 of the third ring terminal pair 140 and the sleeve terminal contact portion 152. The second short detection portion 432 detects the short-circuit state of the third and fourth ring terminals 132 and 134 of the second ring terminal pair 130. [ The third short detection portion 433 detects the short-circuit state of the first and second ring-shaped elements 122 and 124 of the first ring terminal pair 120. [ The fourth short detection portion 434 detects the short circuit state of the contact portion 112 of the tip terminal 110 and the contact portion 162 of the center terminal 160. The fifth short detection portion 435 detects the short-circuit state of the second to third ring terminal pairs 130 and 140. The sixth short detection portion 436 detects the short-circuit state of the first to third ring terminal pairs 120, 130 and 140. The determination unit 437 can collect the detection signals of the first to sixth short detection units 431 to 436 to determine the number of plug electrodes from the three-pole plug to the eight-pole plug as shown in Table 1 below.

The determination unit 437 supplies the display signal S1 to the display 420 in response to the determined number of the plug poles to display the determination result and supplies the switching control signal S2 to the switching circuit 450, And controls the switching state.

In the embodiment shown in the drawing, when the 3.5 mm 4-pole standard audio plug 10 is inserted into the receptacle connector 200, the first to third short detection parts 431 to 434 detect the short-circuit state, 5 and the sixth short detection portions 435 and 436 can not detect the short-circuit state in both of the four and six short detection portions 435 and 436. Therefore, the determination unit 437 determines that the four-pole plug is inserted. The determination unit 437 generates the switching control signal S2 corresponding thereto. Therefore, the sleeve terminal 18 is connected to input the microphone signal M input from the microphone through the switch SW1 to the audio circuit unit 440. [ An R-channel audio signal R output from the audio circuitry 440 is connected to the first ring terminal 16 via a switch SW2. The L channel audio signal L output from the audio circuit 440 is connected to the tip terminal 12 via the switch SW3. And the second ring terminal 16 is grounded.

<Table 1> Plug Number of Poles Detected by Short Detection Table 1st paragraph
detection 2nd paragraph
detection The third paragraph
detection The fourth paragraph
detection Standard 2 poles 6th paragraph detection O Standard three poles The fifth paragraph O O Standard 4 poles O O O O 5 poles O O X 0 Split the first ring O X O O Second ring splitting X O O 0 Split sleeve terminal O O O X Tip terminal split 6 poles
O X X O The first ring and the second ring split X O X O First Ring and Sleeve Terminal Split X X O 0 Split the second ring and sleeve terminals O O X X First Ring and Tip Terminal Split O X O X Second Ring and Tip Terminal Split X O O X Split sleeve terminal and tip terminal 7 poles X X X O Tip terminal X X O X The first ring X O X X The second ring O X X X Sleeve terminal 8 poles X X X X Split all

When the 3.5 mm 8-pole plug connector 100 is inserted into the receptacle connector 200 in the embodiment shown in the drawing, the first to sixth short detection portions 431 to 436 can not detect the short-circuit state. Therefore, the determination unit 437 determines that the 8-pole plug connector 100 is inserted. The determination unit 437 generates the switching control signal S2 corresponding thereto. Therefore, the sleeve terminal 150 is connected to the fourth input / output signal C4, the fifth ring terminal 142 is connected to the microphone signal input, the second conductor ring 122 is connected to the first input / output signal C1, The second ring terminal 124 is an R channel audio signal output, the first ring terminal 122 is a second input / output signal C2, the third ring terminal 132 is a third input / output signal C3, the second ring terminal 124 is an R channel audio signal output, The terminal 110 connects the L channel audio signal output, and the center terminal 160 connects the first input / output signal C1.

Here, the first and fourth input / output signals C1 to C4 may be four kinds of control signals. The four types of control signals may include a remote control signal, an accessory identification signal, and the like. The first and fourth input / output signals C1 to C4 may also be signals of Vs, D +, D-, and GND in the 4-terminal USB format. The fourth input / output signal connected to the center terminal 160 may be any one of a high frequency signal such as a composite video signal, a DMD antenna signal, a GPS antenna signal, a Wi-Fi signal, a wireless LAN antenna signal, a mobile communication antenna signal, .

In the above-described embodiment, the position of the LRGM terminal is fixed to correspond to the terminal of the standard audio connector, but the present invention is not limited thereto.

The controller 430 of the present invention can determine the position of the input / output signal at any pre-programmed position by controlling the switching circuitry 450 with input / output signals corresponding to the respective terminals of the identified accessory in response to the accessory identification signal . The position information of the input / output signal terminals of each accessory may be stored in the memory of the controller 430 or downloaded to the electric device through an external communication network.

For example, the eight terminals of the plug connector 100 can be set to pin-out as shown in the following Table 2 when applied to an accessory device such as an earphone, an ear microphone, and a headphone.

<Table 2> Pin-out setting table of earphone accessory device plug
100 Center terminal
160 Tip terminal
110 The first ring terminal pair
120 The second ring terminal pair
130 The third ring terminal pair
140 Contact
162 Contact
112 The first ring terminal
122 The second ring terminal
124 The third ring terminal
132 The fourth ring terminal
134 The fifth ring terminal
142 Sleeve terminal contact
152 Terminal name C T R1-1 R1-2 R2-1 R2-2 S1 S2 American Standard
AS C1 L C2 R C3 G M C4 European OMTP C1 L C2 R C3 M G C4

Where C1 may be provided for accessory identification signals and the remaining C2 and C3 may be provided for remote control signals such as volume up-down keys, call keys, and C4 may be provided for power.

When applied to an external antenna-coupled earphone accessory device, the eight terminals of the plug connector 100 can be pin-outed as shown in Table 3 below.

<Table 3> Pinout setting of the external antenna combination earphone accessory device plug
100 Center terminal
160 Tip terminal
110 The first ring terminal pair
120 The second ring terminal pair
130 The third ring terminal pair
140 Contact
162 Contact
112 The first ring terminal
122 The second ring terminal
124 The third ring terminal
132 The fourth ring terminal
134 The fifth ring terminal
142 Sleeve terminal contact
152 Terminal name C T R1-1 R1-2 R2-1 R2-2 S1 S2 ANT G L R G D + D- PW

By setting the center terminal 160 as an external antenna connection terminal and the tip terminal 110 as a ground connection terminal, it is possible to prevent interference with other signals while connecting a high frequency signal to an electric device from an antenna coupled to the earphone cable. At the same time, a stereo audio signal, a data signal for remote control and a power supply signal for charging can be connected by a single cable.

Here, the antenna terminal connection can be used as a high frequency test terminal for testing an internal high frequency circuit of an electric device such as a cellular phone. Therefore, in the conventional cellular phone, although a separate coaxial connector for high frequency testing is provided and the coaxial connector is used in the test, the plug connector 100 of the present invention can be combined with the audio input / output at the same time. Therefore, it is possible to remove the coaxial connector separately provided in the electric device.

10A is a view showing one embodiment of a cable accessory device 500 for connecting a display device according to the present invention, and FIG. 10B is a view showing another embodiment of a cable accessory device 500 for connecting a display device according to the present invention to be.

The accessory device 500 is connected to the straight 8-pole plug connector 100 of the present invention at one end of the cable 510 and the composite video signal coaxial connector 504 and the stereo audio plug connector 506 are connected to the other end thereof. The accessory device 510 has a straight 8-pole plug connector 100 of the present invention connected to one end of the cable 511 and three coaxial connectors 512, 514 and 516 and a stereo audio plug connector 518 at the other end .

Cable accessories for connecting display devices When applied to an accessory device, the eight terminals of the plug connector (100) can be pin-outed as shown in <Table 4>.

<Table 4> Pin out setting table of cable accessory device for display connection plug
100 Center terminal
160 Tip terminal
110 The first ring terminal pair
120 The second ring terminal pair
130 The third ring terminal pair
140 Contact
162 Contact
112 The first ring terminal
122 The second ring terminal
124 The third ring terminal
132 The fourth ring terminal
134 The fifth ring terminal
142 Sleeve terminal contact
152 Terminal name C T R1-1 R1-2 R2-1 R2-2 S1 S2 Composite video signal V G L R G D + D- PW RGB RED BLUE GREEN G L R G M S-Video Y G C G L R G M

Therefore, when connecting a mobile phone to a television, a simple cable connection is possible.

11 shows a cable accessory 524 having a male connector 524 at one end of the cable 522 and an eight-pole plug connector 100 of the present invention at the other end, according to an embodiment of the present invention. 520, respectively.

The two connectors 524 and 100 are connected to each other by a cable 522. The flat male connector 524 may include a USB 2.0 connector, a mini USB connector, a memory card connector, or a light connector applied to Apple's iPhone 5S.

When applied to a cable accessory device for personal computer connection, the eight terminals of the plug connector 100 can be pin-outed as shown in Table 5 below.

<Table 5> Pin out setting table of cable accessory device for PC connection plug
100 Center terminal
160 Tip terminal
110 The first ring terminal pair
120 The second ring terminal pair
130 The third ring terminal pair
140 Contact
162 Contact
112 The first ring terminal
122 The second ring terminal
124 The third ring terminal
132 The fourth ring terminal
134 The fifth ring terminal
142 Sleeve terminal contact
152 Terminal name C T R1-1 R1-2 R2-1 R2-2 S1 S2 USB 2.0 M G R L G D + D- Vbus USB 3.0 SSTX + SSTX- SSRX + SSRX- G D + D- Vbus

Therefore, when connecting to PC, USB2.0 cable and audio cable can be easily connected with one cable which is integrated into one. It also has a USB 3.0 adapter cable and a USB 3.0 connector.

When applied to a memory card reader accessory device, the eight terminals of the plug connector 100 can be pin-outed as shown in Table 6 below.

<Table 6> Pin out setting table of memory card reader accessory device plug
100 Center terminal
160 Tip terminal
110 The first ring terminal pair
120 The second ring terminal pair
130 The third ring terminal pair
140 Contact
162 Contact
112 The first ring terminal
122 The second ring terminal
124 The third ring terminal
132 The fourth ring terminal
134 The fifth ring terminal
142 Sleeve terminal contact
152 Terminal name C T R1-1 R1-2 R2-1 R2-2 S1 S2 SD CARD CD / DAT3 VSS D0 D1 D2 CLK VDD CMD SPI - VSS1 D0 D1 VDD SCLK CS VSS2

Therefore, it is possible to connect memory card reader directly by memory card communication protocol method without data conversion by USB 2.0 communication protocol method, so memory and data transmission speed can be increased.

When applied to a cable accessory device for the iPhone 5S or iPhone adapter, the eight terminals of the plug connector 100 can be pin out as shown in Table 7 below.

<Table 7> Pin out setting table of cable accessory device for iPhone adapter plug
100 Center terminal
160 Tip terminal
110 The first ring terminal pair
120 The second ring terminal pair
130 The third ring terminal pair
140 Contact
162 Contact
112 The first ring terminal
122 The second ring terminal
124 The third ring terminal
132 The fourth ring terminal
134 The fifth ring terminal
142 Sleeve terminal contact
152 Terminal name C T R1-1 R1-2 R2-1 R2-2 S1 S2 IPhone 5S Adapter ACC PW D1 + D1- PW ACC ID D2- D2 + G

Therefore, it can be connected with the iPhone 5S or iPhone 5S adapter and adapter cable.

[Other Embodiments]

FIG. 12 is a front view of a straight eight-pole plug connector 600 according to another preferred embodiment of the present invention, FIG. 13A is a rear view of FIG. 12, and FIG. 13B is a sectional view taken along line A-A of FIG.

Referring to the drawings, the plug connector 600 includes a tip terminal 610, a first ring terminal pair 620, a second ring terminal pair 630, a third ring terminal pair 640, a sleeve terminal 650, A terminal 660, a plurality of outer insulating rings 670, and a flexible printed circuit board 680.

A first outer insulating ring 672 is interposed between the tip terminal 610 and the first ring terminal pair 620. A second outer insulating ring 674 is interposed between the first ring terminal pair 620 and the second ring terminal pair 630. A third outer insulating ring 676 is interposed between the second ring terminal pair 630 and the third ring terminal pair 640. The first ring terminal pair 620 includes a first ring terminal 622, a first inner insulating ring 626, and a second ring terminal 624. The second ring terminal pair 630 includes a third ring terminal 632, a second internal insulating ring 636, and a fourth ring terminal 634. The third ring terminal pair 640 includes a fifth ring terminal 642, a third internal insulating ring 646 and a sleeve terminal contact 652. The sleeve terminal 650 includes a contact portion 652 and a flange 654.

13C shows a cross-sectional view of the tip terminal 610 of FIG.

The tip terminal 610 is in the form of a metal rod including a contact portion 612 and an extension portion 614 and having a tip end 616 and a rear end 618. The profile from the tip 616 of the contact portion 612 to the jaw 612b is configured with the same profile as the mating profile of the 3.5 mm 4-pole audio connector. Therefore, by the annular engagement groove 612a of the contact portion 612, the engagement structure is engaged with the receptacle connector in the same manner as the engagement structure of the standard audio connector to maintain the retention state. The outer diameter of the extension portion 614 is determined by the thickness of the ring terminals and the thickness of the flexible printed circuit board 680. In one embodiment, the outer diameter of the extension 614 is in the range of 1.0 to 3.0 mm, particularly preferably in the range of 2.6 to 2.9 mm for a 3.5 mm plug diameter. The outer diameter of the extension 614 serves as a factor that determines the width of the flexible printed circuit board 680. If the extension outer diameter is too small, the width of the conductive lines within the flexible printed circuit board 680 is reduced. The tip terminal 610 may be made of copper, nickel, brass, stainless steel, a metal alloy or any other suitable conductive material or combination of conductive materials.

The sleeve terminal 650 may be made of copper, nickel, brass, stainless steel, a metal alloy or any other suitable conductive material or combination of conductive materials in the form of a pipe having an inner diameter greater than the circumferential outer diameter of the tip terminal 610 . The extension 614 of the tip terminal 610 extends through the inner space of the sleeve terminal 620 and protrudes to the rear of the sleeve terminal 650.

The first ring terminal 122 constituting each of the ring terminal pairs, the second ring terminal 124, the third ring terminal 132, the fourth ring terminal 134 and the fifth ring terminal 142 each have a plug diameter For example, 3.5 mm, and has an inner diameter larger than the outer diameter of the extension portion 614 of the tip terminal 610, for example, an inner diameter of 1.4 to 3.3 mm, preferably an inner diameter of 2.8 to 3.2 mm.

Each ring terminal has a length, for example 1.2 mm, a self-cleaning wiping contact length. The self-cleaning wiping contact length is defined as the length of the first contact with the receptacle connector contact during the connection, followed by the wiping operation along with the receptacle connector contact, It means the contact length that slips through. For example, the self-cleaning wiping contact length may have a length of three to five times the contact size of the receptacle connector. For example, 0.8 mm to 2.5 mm or less.

In the embodiment, each of the ring terminals is formed by cutting a conductive aluminum alloy sheet coated with an aluminum oxide film to a thickness of 50 탆 to form a preform or a donut. Therefore, when the first ring terminal 622 and the second ring terminal 624 are overlapped, an internal insulating ring 626 having a thickness of 100 mu is automatically formed therebetween. Therefore, a total length of 1.2 mm of the first ring terminal 622 + 0.1 mm of the inner insulating ring 626 + 1.2 mm of the length of the second ring terminal 624 corresponds to a length of 23 mm of the ring terminal of the standard audio connector do.

Wherein the ring terminal is formed of a conductive metal and the inner insulating ring may be made of plastic, ceramic, or other nonconductive metal.

The outer insulating ring may be made of any type of plastic, ceramic, or other nonconductive material. The plastic can be, for example, ABS, polyoxymethylene (POM) or a nylon-based polymer. The other nonconductive material may be, for example, a metal coated with an insulating coating, specifically an anodized aluminum surface. Insulating rings are respectively disposed on both sides of the ring terminal to electrically isolate each of the ring terminals. The insulating rings can be made of rubber or elastomeric insulators having waterproof properties.

The flexible printed circuit board 680 is mounted between the extension portions 614 of the tip terminal 610 and the ring terminals. The flexible printed circuit board 680 is for connecting the respective ring terminals of the first ring terminal pair 620, the second ring terminal pair 630, and the third ring terminal pair 640 to corresponding wires of the cable.

FIG. 13D is an exploded view of a preferred embodiment of the flexible printed circuit board 680 of FIG. 12, and FIG. 13E is a cross-sectional view taken along line A-A of FIG. 13D.

Referring to the drawings, a flexible printed circuit board 680 includes a contact area 681 and a connection area 682. Six contact pads 681a, 681b, 681c, 681d, 681e and 681f are formed on the surface of the contact region 681 and six bonding pads 682a, 682b, 682c, 682d, 682e, and 682f are formed. And includes a first layer 683 and a second layer 684 as a multilayer printed circuit board. And may include horizontal lines 683a, 683b, 683c, 683d, 683e, 683f for connecting the contact pads and the bonding pads between the first layer 683 and the second layer 684. The contact pad 681a is connected to the bonding pad 682a through the horizontal line 683a. The contact pad 681b is connected to the bonding pad 682b through the horizontal line 683b. The contact pad 681c is connected to the bonding pad 682c through a horizontal line 683c. The contact pad 681d is connected to the bonding pad 682d through a horizontal line 683d. The contact pad 681e is connected to the bonding pad 682e through a horizontal line 683e. The contact pad 681f is connected to the bonding pad 682f through a horizontal line 683f. A charcoal layer 685 may be formed on the bottom surface of the first layer 683.

The foregoing description of exemplary embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and many modifications and variations are possible in light of the above teachings. The embodiments have been chosen and described in order to best explain the principles of the invention and its practical application so that others skilled in the art will, in various embodiments, utilize the various modifications Making the invention best available.

In addition, those skilled in the art will recognize many equivalents to the specific embodiments of the invention described herein or may be ascertainable using only routine experimentation. Such equivalents should be considered to be encompassed by the following claims.

Claims

A straight plug connector comprising a tip terminal electrically insulated from each other, a plurality of ring terminals and a sleeve terminal,
The plurality of ring terminals constituting at least one ring terminal pair,
Wherein the at least one ring terminal pair corresponds to one ring terminal of a standard audio plug connector.

2. The method of claim 1, wherein the at least one ring terminal pair comprises a first ring terminal pair and a second ring terminal pair,
The first ring terminal pair corresponding to the first ring terminal of the standard audio plug connector and the second ring terminal pair corresponding to the second ring terminal of the standard audio plug connector.

The connector according to claim 1, wherein a contact portion of one of the ring terminals adjacent to the sleeve terminal and the sleeve terminal forms one ring terminal pair different from the at least one ring terminal pair, And the ring terminal pair corresponds to the contact portion of the sleeve terminal of the standard audio plug connector.

2. The connector of claim 1, wherein each of the tip terminal and the plurality of ring terminals includes an abutment portion in contact with a corresponding terminal of the force-
Wherein the extension portion is constituted by a conductive metal pipe whose surface is coated with an insulating film, and the front end and the rear end of the extension portion each have an exposure surface for electrical contact.

The straight plug connector according to claim 4, wherein the contact portions of each of the plurality of ring terminals are composed of a conductive metal ring whose front end face and rear end face are coated with an insulating coating.

The straight plug connector according to claim 4 or 5, wherein the conductive metal whose surface is coated with an insulating coating is one of an anodized aluminum or an aluminum alloy.

The connector of claim 1, wherein the size of each of the plurality of outer insulating rings that isolate the opposite ends of the ring terminal pairs is equal to the size of the insulating ring of the standard audio plug connector, and between the two ring terminals of each of the ring terminal pairs Is smaller than the size of the insulation ring of the standard audio plug connector.

8. The straight plug connector of claim 7, wherein the outer insulating ring and the inner insulating rings are formed of any one of plastic, ceramic, or metal coated with an insulating coating.

8. The straight plug connector according to claim 7, wherein the inner insulating ring comprises an insulating coating coated on a surface of a ring-shaped contact front end surface and a rear end surface of each of the plurality of ring terminals.

The straight plug connector according to claim 1, wherein the tip terminal includes a through hole passing through the center, and the center terminal is included in the through hole.

11. The straight plug connector of claim 10, wherein the center terminal comprises a conductive metal pipe whose surface is coated with an insulating coating, and the front end and the rear end each have an exposed surface for electrical contact.

The straight plug connector of claim 1, wherein the electrical insulation is formed by an insulator injected between the terminals.

A straight plug connector comprising a tip terminal electrically insulated from each other, a plurality of ring terminals and a sleeve terminal,
Wherein one ring terminal adjacent to the sleeve terminal of the plurality of ring terminals and a contact portion of the sleeve terminal form one ring terminal pair,
Said pair of ring terminals corresponding to a contact portion of a sleeve terminal of said standard audio plug connector.

14. The connector of claim 13, wherein each of the tip terminal and the plurality of ring terminals includes an abutment portion that makes contact with a corresponding terminal of the force-feedback connector and an extension to be brazed with a corresponding electric wire of the cable,
Wherein the extension portion is constituted by a conductive metal pipe whose surface is coated with an insulating film, and the front end and the rear end of the extension portion each have an exposure surface for electrical contact.

15. The straight plug connector of claim 14, wherein the contact portions of each of the plurality of ring terminals are composed of a conductive metal ring having a front end surface and a rear end surface coated with an insulating coating.

16. A straight plug connector according to claim 14 or 15, wherein the conductive metal whose surface is coated with an insulating coating is one of anodized aluminum or aluminum alloy.

14. The straight plug connector of claim 13, wherein the size of the inner insulating ring that isolates between the two ring terminals of the ring terminal pair is less than the outer insulating ring having the same size as the size of the insulating ring of the standard audio plug connector.

18. The straight plug connector of claim 17, wherein the outer insulating ring and the inner insulating rings are formed of any one of plastic, ceramic, or metal coated with an insulating coating.

The straight plug connector according to claim 17, wherein the inner insulating ring comprises an insulating coating coated on a surface of a ring-shaped contact front end face and a rear end face of each of the plurality of ring terminals.

14. The straight plug connector of claim 13, wherein the tip terminal includes a through hole passing through the center, and the center terminal is included in the through hole.

14. The straight plug connector of claim 13, wherein the center terminal comprises a conductive metal pipe whose surface is coated with an insulating coating, and the front end and the rear end each have an exposed surface for electrical contact.

14. The straight plug connector of claim 13, wherein the electrical insulation is formed by insulators injected between respective terminals.

A straight plug connector comprising a tip terminal electrically insulated from each other, a plurality of ring terminals and a sleeve terminal,
The plurality of ring terminals including a first ring terminal pair and a second ring terminal pair,
The first ring terminal pair corresponds to the first ring terminal of the standard audio plug connector and the second ring terminal pair corresponds to the second ring terminal of the standard audio plug connector,
Wherein one of the plurality of ring terminals is adjacent to the sleeve terminal and the contact portion of the sleeve terminal forms a third ring terminal pair and the third ring terminal pair corresponds to the contact portion of the sleeve terminal of the standard audio plug connector Straight plug connector.

24. The connector of claim 23, wherein the size of each of the plurality of outer insulating rings insulating both ends of the ring terminal pairs is equal to the size of the insulating ring of the standard audio plug connector, and between the two ring terminals of each of the ring terminal pairs Is smaller than the size of the insulation ring of the standard audio plug connector.

24. The straight plug connector of claim 23, wherein the tip terminal includes a through hole through the center and includes a center terminal in the through hole.

26. The straight plug connector of claim 25, wherein the center terminal is provided for connecting a signal having a higher frequency than an audio signal, such as an antenna signal or an image signal.

27. The plug connector of claim 26, wherein the tip terminal is provided for ground signal connection for shielding the center terminal.

24. The straight plug connector of claim 23, wherein each of said first through third ring terminal pairs is provided with at least one ring terminal in the same pin out as a pin out of a standard audio plug connector.

The straight plug connector of claim 1; And
And a cable electrically connected to the straight plug connector.

30. The straight plug connector of claim 29 wherein said standard audio plug connector is a 3.5 mm four pole plug connector.

A straight plug connector comprising a tip terminal electrically insulated from each other, a plurality of ring terminals and a sleeve terminal,
The plurality of ring terminals constituting at least one ring terminal pair,
Wherein the at least one ring terminal pair corresponds to one ring terminal of a standard audio plug connector,
Wherein each of the plurality of ring terminals is electrically connected to corresponding wires of a cable through a flexible printed circuit board interposed between an outer circumferential surface of an extension of the tip terminal and an inner circumferential surface of the ring terminal.

32. The method of claim 31, wherein the flexible printed circuit board
A contact region formed with a plurality of contact pads electrically in contact with an inner circumferential surface of each of the plurality of ring terminals and a connection region extending rearward of the sleeve terminal and having a plurality of bonding pads to which corresponding wires of the cable are soldered Straight plug connector.