TWI912804B - Composite electrical connector - Google Patents

Abstract

A composite electrical connector includes a plurality of mating terminals. Each mating terminal includes a contact portion, a securing portion and a welding portion. The securing portions and the welding portions are respectively arranged in a row. The contact portions of the mating terminal are arranged in an upper contact portion row and a lower contact portion row. The detection terminals are arranged adjacent to the upper contact rows. The configuration of the upper contact portion row and the lower contact portion row of the mating terminal is adapted to a first interface standard and a second interface standard. The first interface standard defines a plurality of first differential signal pins and a plurality of ground pins, a pair of power pins and a functional pin. The second interface specification defines a plurality of pairs of second differential signal pins, a plurality of shielding pins, a pair of power pins and a plurality of functional pins. The mating terminal corresponding to the 19^th pin of the first interface standard and the second interface standard has a fork-like structure.

Description

Composite electrical connector

This invention relates to a female-terminal composite electrical connector, and more particularly to a composite electrical connector suitable for mating with male-terminal electrical connectors of two interface specifications.

Electrical connectors are used to connect electronic components, electronic components and electronic devices, or electronic devices themselves to transmit electronic signals. Therefore, various electronic devices commonly used in daily life are equipped with electrical connectors, such as desktop computers, laptops, mobile devices, and even automotive electronic equipment. Female electrical connectors have a mating interface for male electrical connectors to be inserted to complete the connection.

Existing electronic devices typically need to connect to other electronic devices with different interface specifications. Therefore, multiple interfaces with different interface specifications are set up, that is, female electrical connectors with different interface specifications are set up for male electrical connectors of different specifications to connect to. However, setting up multiple female electrical connectors takes up a lot of space in electronic devices, especially in electronic devices such as laptops or tablets, which are increasingly required to be thinner and lighter. The number of interfaces should be reduced as much as possible. Therefore, how to integrate multiple female electrical connectors with different interface specifications is an important issue in the current development of electrical connectors.

The purpose of this invention is to provide a composite electrical connector suitable for connecting two electrical connectors with different interface specifications, thereby solving the technical problem in the prior art that electronic devices need to be equipped with multiple female electrical connectors to connect male electrical connectors of different specifications.

An embodiment of the composite electrical connector of the present invention includes a plurality of mating terminals. Each mating terminal includes a contact portion, a fixing portion, and a solder portion. The fixing portions are arranged in a row, and the solder portions are arranged in a row and respectively connected to the fixing portions. The contacts of the mating terminals are arranged into an upper contact portion row and a lower contact portion row. A detection terminal is disposed adjacent to the upper contact portion row. The configuration of the upper and lower contact arrays of the connector is adapted to a first interface specification and a second interface specification. The first interface specification is defined as having a plurality of first differential signal pins, a plurality of ground pins, a pair of power pins, and a functional pin. The second interface specification is defined as having a plurality of pairs of second differential signal pins, a plurality of shield pins, a pair of power pins, and a plurality of functional pins. The first interface specification is DisplayPort, and the second interface specification is High Definition Multimedia Interface (HDMI). One terminal corresponds to pin 19 of the first interface specification and pin 19 of the second interface specification. The fixing part of the terminal corresponding to pin 19 has a forked structure and includes a first forked part and a second forked part. The other terminal corresponds to pin 20 of the first interface specification. The first forked part and the second forked part are respectively located on opposite sides of the fixing part of the other terminal corresponding to pin 20.

In another embodiment, the contact portion of the mating terminal corresponding to a plurality of first differential signal pins of the first interface specification has a shorter length than the contact portions of other mating terminals.

In another embodiment, one mating terminal corresponds to pin 18 of the first interface specification, and the other mating terminal corresponds to pin 18 of the second interface specification. The contact portion of the mating terminal corresponding to pin 18 of the first interface specification and the contact portion of the mating terminal corresponding to pin 18 of the second interface specification are aligned with each other and located in a front-back position in the mating direction.

In another embodiment, a detection terminal is further included. The first pin of the first interface specification and the first pin of the second interface specification share a common terminal. The detection terminal is adjacent to the common terminal of the first pin. The second pin of the first interface specification and the second pin of the second interface specification share another common terminal. The common terminal of the second pin has an abutting spring portion, which is disposed on the common terminal of the second pin.

In another embodiment, it further includes an insulation structure, wherein the insulation structure includes a tongue portion and a retaining portion orthogonal to the tongue portion, the upper contact portion array of the contacts of the terminals is disposed on the upper surface of the tongue portion, the lower contact portion array of the contacts is disposed on the lower surface of the tongue portion, and the solder portion and the fixing portion of the terminals are held by the retaining portion.

In another embodiment, the metal housing further includes a first limiting portion having a first extension, a connecting portion and a second extension, the connecting portion connecting the first extension and the second extension, the first extension being parallel to the second extension, one end of the first extension being fixed to the metal housing and being further away from the second bearing surface than the second extension, one end of the second extension being a free end, and the second counter-connector interfering with the first extension and abutting against the second extension.

In another embodiment, the metal shell further includes a second limiting portion, which is disposed opposite to the first limiting portion. The second limiting portion has a limiting protrusion, a fixed section, and a free section. The fixed section and the free section are respectively connected to opposite sides of the limiting protrusion, and the fixed section is connected to the metal shell. When the second counter-connector is reversed and connected to the metal shell, the second counter-connector abuts against the limiting protrusion.

In another embodiment, the metal shell further includes a first open portion and a second open portion, the first open portion being formed on the top wall of the metal shell, the second open portion being formed on the inclined surface of the second bearing surface and the bottom wall of the metal shell, the first limiting portion being in the first open portion, and the second limiting portion being in the second open portion.

In another embodiment, one mating terminal corresponds to pin 5 of the first interface specification and pin 5 of the second interface specification simultaneously; another mating terminal corresponds to pin 8 of the first interface specification and pin 8 of the second interface specification; yet another mating terminal corresponds to pin 11 of the first interface specification and pin 11 of the second interface specification; and yet another mating terminal corresponds to pin 16 of the first interface specification and pin 16 of the second interface specification. The fixing portion of each mating terminal corresponding to pins 5, 8, 11, and 16 has a bifurcated structure.

The composite electrical connector of this invention forms a bifurcated structure on the 19th pin, having a first bifurcated portion and a second bifurcated portion. The function of the 19th pin of the first interface specification is different from that of the 19th pin of the second interface specification. By forming a bifurcated structure on the 19th pin, it can be connected to different circuits in an electronic device. When corresponding to a first interface specification power connector or a second interface specification power connector, it can perform the functions of the 19th pin of the first interface specification and the 19th pin of the second interface specification, respectively.

Please refer to Figures 1 and 2, which illustrate an embodiment of the composite electrical connector of the present invention. The composite electrical connector 1 of this embodiment includes a plurality of mating terminals 10, an insulating structure 20, a metal housing 30, and a detection terminal 40. The plurality of mating terminals 10 and the detection terminal 40 are disposed in and positioned by the insulating structure 20. The metal housing 30 covers the mating terminals 10 and the insulating structure 20, forming a mating space for a peer electrical connector to mate with and contact the mating terminals 10 to form an electrical connection. The metal housing 30 is fixed to a circuit board P, and the mating terminals 10 form an electrical connection with the circuit board P, thereby transmitting electronic signals.

As shown in Figures 3, 4, 5, and 6, most of the terminals 10 of the composite electrical connector 1 in this embodiment include a contact portion 11, a fixing portion 12, and a soldering portion 13. This embodiment has twenty-one terminals 10. The contact portions 11 and soldering portions 13 are connected to opposite ends of the fixing portions 12. All the fixing portions 12 of the terminals 10 are arranged in one row, and all the soldering portions 13 of the terminals 10 are arranged in one row. All the contact portions 11 of the terminals 10 are arranged in two columns, an upper contact column A and a lower contact column B. The upper contact column A includes ten contact portions 11 of the terminals 10, and the lower contact column B includes eleven contact portions 11 of the terminals 10.

The connector 10 of this embodiment is applicable to both a first interface specification and a second interface specification. The first interface specification of this embodiment is DisplayPort, and the second interface specification is High Definition Multimedia Interface (HDMI). The connector 10 shown in Figures 4, 5, and 6 has pin numbers marked on it, and the numbers marked on each connector 10 are the corresponding pins. Corresponding to the upper contact section A, the mating terminals 10, from right to left according to the mating direction, correspond to terminal pins 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19 of the first interface specification. Terminal pins 1 and 3, 7 and 9, and 15 and 17 are the first differential mating terminal pairs; terminal pins 5, 11, and 13 are the first grounding terminals; and terminal pin 19 is the first power terminal (power signal feedback). The terminals 10 of the lower contact section B, from right to left according to the mating direction, correspond to the terminal pins 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20 of the first interface specification, respectively. Among them, terminal pins 4 and 6, terminal pins 10 and 12 are the first differential mating terminal pairs, terminal pins 2, 8, 14 and 16 are the first grounding terminals, terminal pin 18 is the functional terminal (hot-plug detection), and terminal pin 20 is the first power terminal.

The terminals 10 corresponding to the upper contact section A, from right to left according to the mating direction, are the terminal pins 1, 3, 5, 7, 9, 11, 13, 15, 17 and 19 of the second interface specification, respectively. Among them, terminal pins 1 and 3, terminal pins 7 and 9 are second differential mating terminal pairs, terminal pins 5 and 11 are shielding terminals, terminal pin 13 is a functional terminal (CEC), terminal pin 15 is a functional terminal (SCL), terminal pin 17 is a ground terminal (DDC/CEC ground), and terminal pin 19 is a functional terminal (hot-plug detection). The terminals 10 corresponding to the lower contact section B, from right to left according to the mating direction, are terminal pins 2, 4, 6, 8, 10, 12, 14, 16 and 18 of the second interface specification, respectively. Among them, terminal pins 2 and 8 are shielded terminals, terminal pins 4 and 6, terminal pins 10 and 12 are second differential mating terminal pairs, terminal pin 14 is a functional terminal (reserved pin), terminal pin 16 is a functional terminal (SDA), and terminal pin 18 is a power terminal.

The fixing portions 12 and solder portions 13 of all the mating terminals 10 are arranged in a row. To prevent crosstalk, at least one fixing portion 12 and solder portion 13 of a ground terminal or a fixing portion 12 and solder portion 13 of a functional terminal is provided between the fixing portions 12 and solder portions 13 of two first differential mating terminal pairs. At least one fixing portion 12 and solder portion 13 of a shield terminal or a fixing portion 12 and solder portion 13 of a functional terminal is provided between the fixing portions 12 and solder portions 13 of two second differential mating terminal pairs.

As shown in Figure 3, the contact portion 11 of the mating terminal 10 corresponding to the plurality of first differential signal pins 1, 3, 4, 6, 7, 9, 10, 12, 15, 17 of the first interface specification has a shorter length than the contact portion 12 of the other mating terminals 10.

In this embodiment, the detection terminal 40 is arranged adjacent to the upper contact column A. The first pin of the first interface specification and the first pin of the second interface specification share a common terminal 10a. The detection terminal 40 is arranged adjacent to the terminal 10a corresponding to the first pin of the first interface specification and the second interface specification, that is, the rightmost terminal 10 of the upper contact column A. The second pin of the first interface specification shares another mating terminal 10b with the second pin of the corresponding second interface specification. The mating terminal 10b is the mating terminal closest to the detection terminal 40 in the lower contact row B. The mating terminal 10b has an abutment spring portion 14, which is connected to the front end side of the contact portion 11 of the mating terminal 10b. The abutment spring portion 14 is L-shaped and extends rearward to the lower part of the detection terminal 40. When the power adapter is mated with the composite electrical connector 1 of the present invention, the power adapter interferes with the abutment spring portion 14, causing the abutment spring portion 14 to move upward and abut against the detection terminal 40.

Additionally, one terminal 10c corresponds to pin 19 of the first interface specification and pin 19 of the second interface specification. The fixing portion 12 of the terminal 10c corresponding to pin 19 has a bifurcated structure and includes a first bifurcated portion 10c1 and a second bifurcated portion 10c2. The other terminal corresponds to pin 20 of the first interface specification. The first bifurcated portion 10c1 and the second bifurcated portion 10c2 are respectively located on opposite sides of the fixing portion 12 of the other terminal corresponding to pin 20.

Another terminal 10d corresponds to pin 18 of the first interface specification, and another terminal 10e corresponds to pin 18 of the second interface specification. The contact portion 11 of the terminal 10d corresponding to pin 18 of the first interface specification and the contact portion 11 of the terminal 10e corresponding to pin 18 of the second interface specification are aligned with each other and are located in a front-back position in the mating direction.

One terminal 10 corresponds to pin 5 of the first interface specification and pin 5 of the second interface specification simultaneously; another terminal 10 corresponds to pin 8 of the first interface specification and pin 8 of the second interface specification; yet another terminal 10 corresponds to pin 11 of the first interface specification and pin 11 of the second interface specification; and yet another terminal... Terminal 10 corresponds to pin 16 of the first interface specification and pin 16 of the second interface specification. The fixing part 12 of each mating terminal 10 corresponding to pins 5, 8, 11 and 16 has a bifurcated structure to form electromagnetic shielding for the differential signal pins of pins 1, 3, 7, 9, 15, 17, 4, 6 and 10, 12.

The mating terminals 10 of the composite electrical connector 1 of this embodiment are formed into an insulating structure 20 by stamping metal strip and then inserting it into the insulating structure 20, thereby bonding the mating terminals 10 to the insulating structure 20. The insulating structure 20 of this embodiment includes a tongue portion 21 and a retaining portion 22 orthogonal to the tongue portion 21. The upper contact portion row A of the contact portions 11 of the plurality of mating terminals 10 is disposed on the upper surface of the tongue portion 21, and the lower contact portion row B of the contact portions 11 is disposed on the lower surface of the tongue portion 21. The fixing portions 12 and welding portions 13 of the plurality of mating terminals 10 are held by the retaining portion 22.

Referring to Figures 7 and 8, the metal housing 30 of the composite electrical connector 1 in this embodiment covers the insulation structure 20 and has a pair of interfaces 31 for mating a first-interface-specification connector and a second-interface-specification connector. Each interface 31 has a first abutment surface 32 and a second abutment surface 33 on opposite sides. The first abutment surface 32 and the second abutment surface 33 are arranged facing each other, as shown in Figures 11 to 19. The first or second abutment connector abuts against the first abutment surface 32, and the first abutment connector abuts against the second abutment surface 33 through a configurational fit. In this embodiment, the first abutment surface 32 is a vertical plane, and the second abutment surface 33 includes a vertical plane and an inclined plane.

The metal shell 30 further includes a first limiting portion 34, which is formed at the top of the metal shell 30. The first limiting portion 34 has a first extension 341, a connecting portion 342 and a second extension 343. The connecting portion 342 connects the first extension 341 and the second extension 343. The first extension 341 is parallel to the second extension 343. One end of the first extension 341 is fixed to the metal shell 30. One end of the second extension 343 is a free end. The first extension 341 is farther away from the second bearing surface 33 than the second extension 343.

The metal shell 30 further includes a second limiting portion 35, which is disposed opposite to the first limiting portion 34. The second limiting portion 35 has a limiting protrusion 351, a fixed section 352, and a free section 353. The fixed section 352 and the free section 353 are respectively connected to opposite sides of the limiting protrusion 351, so that the second limiting portion 35 forms a Z-shaped structure. The fixed section 352 has a gradually rising arc-shaped structure, which gradually rises from the bottom wall of the metal shell 30 so that the limiting protrusion 351 is higher than the bottom wall of the metal shell 30. The free section 353 forms a gradually rising arc-shaped structure and gradually descends to the bottom wall of the metal shell 30. The fixed section 352 is connected to the metal shell 30, and the free section 353 is separated from the metal shell 30. The free section 353 is closer to the second bearing surface 33 than the fixed section 352.

The metal shell 30 further includes a first open portion 36 and a second open portion 37. The first open portion 36 is formed on the top wall of the metal shell 30, and the second open portion 37 is formed on the inclined surface of the second bearing surface 33 and the bottom wall of the metal shell 30. The first limiting portion 34 is located in the first open portion 36, and the second limiting portion 35 is located in the second open portion 37.

Please refer to Figures 9 and 10, which show the state of the composite electrical connector of the present invention being connected to the counterpart electrical connector of the first interface specification. The counterpart electrical connector C1 of the first interface specification is a DisplayPort plug electrical connector. When the counterpart electrical connector C1 of the first interface specification is connected to the composite electrical connector 1 of the present embodiment, the opposite sides of the counterpart electrical connector C1 of the first interface specification abut against the first bearing surface 32 and the second bearing surface 33, respectively. At the same time, the counterpart electrical connector C1 of the first interface specification interferes with the first limiting part 34 and the second limiting part 35, pushing the first limiting part 34 and the second limiting part 35 upwards, thereby making contact between the first terminal C11 of the counterpart electrical connector C1 and the connecting terminal 10 to form an electrical connection.

Please refer to Figure 11. When the first interface specification of the electric connector C1 is connected to the composite electric connector 1 of this embodiment, the electric connector C1 and the spring contact portion 14 of the connecting terminal 10b will not interfere with each other. Therefore, the spring contact portion 14 of the connecting terminal 10b will not contact the detection terminal 40.

Please refer to Figures 12 and 13, which illustrate the connection between the composite electrical connector of the present invention and a second-interface-specification counterpart electrical connector. The second-interface-specification counterpart electrical connector C2 is an HDMI plug electrical connector. The dimensions of the second-interface-specification counterpart electrical connector C2 are smaller than the dimensions of the first-interface-specification counterpart electrical connector C1. When the second interface specification of the matching electric connector C2 is connected to the composite electric connector 1 of this embodiment, one side of the matching electric connector C2 abuts against the first bearing surface 32, and the other side of the matching electric connector C2 interferes with the first extension 341 of the first limiting part 34 and abuts against the second extension 343. In this way, the second interface specification of the matching electric connector C2 can be inserted in the correct position so that the second terminal C21 of the matching electric connector C2 contacts the matching terminal 10 to form an electrical connection.

Referring to Figure 14, when the second interface specification of the matching electric connector C2 is connected to the composite electric connector 1 of this embodiment, interference occurs between the matching electric connector C2 and the spring contact portion 14 of the matching terminal 10b. Therefore, the spring contact portion 14 of the matching terminal 10b moves upward and makes contact with the detection terminal 40. By determining whether the spring contact portion 14 is in contact with the detection terminal 40, a detection signal is transmitted to the circuit of the electronic device, enabling the electronic device to identify whether the matching electric connector 1 is the first interface specification of the matching electric connector C1 or the second interface specification of the matching electric connector C2.

Please refer to Figures 15 and 16, which show the state in which the second-interface-specification handheld electric connector C2 is reverse-connected to the composite electric connector 1 of this embodiment. Because the second-interface-specification handheld electric connector C2 is smaller in size, the user may connect it to the composite electric connector 1 of this embodiment in the opposite direction. Therefore, when the second-interface-specification handheld electric connector C2 is reverse-connected to the composite electric connector 1 of this embodiment, the second-interface-specification handheld electric connector C2 abuts against the limiting protrusion 351 of the second limiting part 35. The limiting protrusion 351 forms a stop for the handheld electric connector C2, thus preventing the second-interface-specification handheld electric connector C2 from being reverse-connected to the composite electric connector 1 of this embodiment.

The composite electrical connector of this invention forms a bifurcated structure on the 19th pin, having a first bifurcated portion and a second bifurcated portion. The function of the 19th pin of the first interface specification is different from that of the 19th pin of the second interface specification. By forming a bifurcated structure on the 19th pin, it can be connected to different circuits in an electronic device. When corresponding to a first interface specification power connector or a second interface specification power connector, it can perform the functions of the 19th pin of the first interface specification and the 19th pin of the second interface specification, respectively.

The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent changes and modifications made to the scope of the claims and descriptions of the present invention are still within the scope of the present invention. Furthermore, no embodiment or claim of the present invention needs to achieve all the purposes, advantages, or features disclosed in the present invention. In addition, the abstract and title are merely for assisting in patent document searches and are not intended to limit the scope of the present invention. Moreover, the terms "first" and "second" used in this specification or claim are only used to name elements or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

1: Composite Electrical Connector 10, 10a, 10b, 10c, 10d, 10e: Butt Terminals 10c1: First Branch Section 10c2: Second Branch Section 11: Contact Section 12: Fixed Section 13: Welded Section 14: Spring Contact Section 20: Insulation Structure 21: Tongue Plate Section 22: Retaining Section 30: Metal Shell 31: Butt Interface 32: First Support Surface 33: Second Support Surface 34: First Limiting Section 35: Second Limiting Section 36: First Through Section 37: Second Through Section 40: Detection Terminal 341: First Extension Section 342: Connecting Section 343: Second Extension Section 351: Limiting Protrusion 352: Fixed Section 353: Free Section A: Upper Contact Line B: Lower Contact Line C1: First Pair of Electrical Connectors C11: First Terminal C2: Second Pair of Electrical Connectors C21: Second Terminal P: Circuit Board

Figure 1 is a perspective view of an embodiment of the composite electrical connector of the present invention. Figure 2 is an exploded perspective view of the composite electrical connector of Figure 1. Figure 3 is a perspective view of the mating terminals of the composite electrical connector of Figure 1 connected to an insulation structure. Figure 4 is a perspective view of the terminal arrangement of the composite electrical connector of Figure 1. Figure 5 is a perspective view of another angle of the terminal arrangement of the composite electrical connector of Figure 4. Figure 6 is yet another perspective view of the terminal arrangement of the composite electrical connector of Figure 4. Figure 7 is another perspective view of the composite electrical connector of Figure 1. Figure 8 is yet another perspective view of the composite electrical connector of Figure 1. Figure 9 is a perspective view of a first interface specification connector mating with the composite electrical connector of the present invention. Figure 10 is a cross-sectional view of Figure 9 along line A-A. Figure 11 is a cross-sectional view of Figure 9 along line B-B and a partially enlarged view. Figure 12 is a perspective view showing the mating of the second interface specification's peer connector with the composite electrical connector of the present invention. Figure 13 is a cross-sectional view of Figure 12 along line C-C. Figure 14 is a cross-sectional view of Figure 12 along line D-D and a partially enlarged view. Figure 15 is a perspective view showing the first interface specification's peer connector mating in reverse with the composite electrical connector of the present invention. Figure 16 is a cross-sectional view of Figure 15 along line E-E.

10, 10a, 10b, 10c: Connecting terminals

10c1: First bifurcation point

10c2: Second bifurcation

14: Shrapnel contact area

40: Detection Terminal

A: Top contact area

B: Lower contact area

Claims (10)

A composite electrical connector includes: a plurality of mating terminals, each mating terminal including a contact portion, a fixing portion, and a soldering portion; the fixing portions are arranged in a row; the soldering portions are arranged in a row and respectively connected to the fixing portions; the contact portions of the mating terminals are arranged in an upper contact portion row and a lower contact portion row; The configuration of the upper and lower contact arrays of the connecting terminals is adapted to a first interface specification and a second interface specification. The first interface specification defines a plurality of first differential signal pins, a plurality of ground pins, a pair of power pins, and a functional pin. The second interface specification defines a plurality of pairs of second differential signal pins, a plurality of shield pins, a pair of power pins, and a plurality of functional pins. The first interface specification is DisplayPort, and the second interface specification is High Definition Multimedia Interface (HDMI). One of the terminals corresponds to pin 19 of both the first interface specification and pin 19 of the second interface specification. The fixing portion of the terminal corresponding to pin 19 has a forked structure and includes a first forked portion and a second forked portion. The other terminal corresponds to pin 20 of the first interface specification. The first forked portion and the second forked portion are respectively located on opposite sides of the fixing portion of the other terminal corresponding to pin 20. The composite electrical connector as described in claim 1, wherein the contact portion of the mating terminals corresponding to a plurality of first differential signal pins of the first interface specification has a shorter length than the contact portion of other mating terminals. As described in claim 1, in a composite electrical connector, one of the mating terminals corresponds to pin 18 of the first interface specification, and the other mating terminal corresponds to pin 18 of the second interface specification. The contact portion of the mating terminal corresponding to pin 18 of the first interface specification and the contact portion of the mating terminal corresponding to pin 18 of the second interface specification are aligned with each other and located in a front-back position in the mating direction. The composite electrical connector as described in claim 1 further includes a detection terminal, wherein the first pin of the first interface specification and the first pin of the second interface specification share a mating terminal, the detection terminal is adjacent to the mating terminal corresponding to the first pin, the second pin of the first interface specification and the second pin of the second interface specification share another mating terminal, and the mating terminal corresponding to the second pin has an abutment spring portion that can abut against the detection terminal. The composite electrical connector as described in claim 1 further includes an insulation structure, wherein the insulation structure includes a tongue portion and a retaining portion orthogonal to the tongue portion, the upper contact portion array of the contacts of the terminals is disposed on the upper surface of the tongue portion, the lower contact portion array of the contacts is disposed on the lower surface of the tongue portion, and the solder portion and the fixing portion of the terminals are retained by the retaining portion. The composite electrical connector as described in claim 5 further includes a metal housing, wherein the metal housing covers the insulation structure and has a pair of interfaces for mating a first-interface-specification connector and a second-interface-specification connector. Each of the interfaces has a first abutment surface and a second abutment surface on opposite sides. The first-interface-specification connector or the second-interface-specification connector abuts against the first abutment surface. The first-interface-specification connector abuts against the second abutment surface by means of a configurational fit. The first abutment surface and the second abutment surface are arranged facing each other. The first abutment surface is a straight surface, and the second abutment surface includes a straight surface and a bevel. The composite electrical connector as described in claim 6, wherein the metal housing further includes a first limiting portion having a first extension, a connecting portion and a second extension, the connecting portion connecting the first extension and the second extension, the first extension being parallel to the second extension, one end of the first extension being fixed to the metal housing and being further away from the second bearing surface than the second extension, one end of the second extension being a free end, and the second counter connector interfering with the first extension and abutting against the second extension. The composite electrical connector as described in claim 7 further includes a second limiting portion disposed opposite to the first limiting portion. The second limiting portion has a limiting protrusion, a fixed section, and a free section. The fixed section and the free section are respectively connected to opposite sides of the limiting protrusion, and the fixed section is connected to the metal housing. When the second counter-connector is reversed and connected to the metal housing, the second counter-connector abuts against the limiting protrusion. The composite electrical connector as described in claim 8, wherein the metal housing further includes a first open portion and a second open portion, the first open portion being formed on the top wall of the metal housing, the second open portion being formed on the inclined surface of the second bearing surface and the bottom wall of the metal housing, the first limiting portion being in the first open portion, and the second limiting portion being in the second open portion. The composite electrical connector as described in claim 1, wherein one of the mating terminals corresponds to pin 5 of the first interface specification and pin 5 of the second interface specification simultaneously, another mating terminal corresponds to pin 8 of the first interface specification and pin 8 of the second interface specification, yet another mating terminal corresponds to pin 11 of the first interface specification and pin 11 of the second interface specification, and yet another mating terminal corresponds to pin 16 of the first interface specification and pin 16 of the second interface specification, and the fixing portion of each of the mating terminals corresponding to pins 5, 8, 11 and 16 has a bifurcated structure.