Connector

Abstract

To disclose a connector capable of ensuring that there is no contact failure between a second terminal and a circuit board in an environment with vibrations.SOLUTION: A connector includes a housing (3) in which a plurality of first terminal slots (31) arranged with an interval in a transverse direction are formed, a plurality of first terminals respectively inserted into the plurality of first terminal slots (31), and a top cover (4) attached to a top part of the housing (3). The top cover (4) enables rotary opening and closing of the top cover (4) by being connected to the plurality of first terminals in a rotatable manner. Therefore, the first terminals can effectively prevent the top cover from coming out of the housing due to vibrations. Also, in some exemplary embodiments of the invention, the top cover assures reliable electric contact between the circuit board of the connector and second terminals by adding prescribed pressing force to an inserted circuit board.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Chinese Patent Application No. 202310696584.X, filed with the China State Intellectual Property Office on June 13, 2023, the entire disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a connector. [Background technology]

[0003] A connector usually includes a housing, a terminal, and an upper cover. The terminal is attached to the housing. The upper cover is attached to the upper surface of the housing. In the prior art, the terminal has no constraint or restriction on the upper cover. In addition, the upper cover and the terminal are separated, and the upper cover cannot apply a pressing force to the inserted circuit board, so that the terminal can only rely on its own elastic force to make electrical contact with the inserted circuit board. Therefore, in the prior art, when the connector is applied to an environment with vibration, the upper cover is likely to come off, and poor contact between the terminal and the circuit board is also likely to occur. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT The present invention is directed to overcoming or alleviating at least one aspect of the above-mentioned disadvantages. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided a connector comprising a housing having a plurality of first terminal slots spaced apart in a transverse direction, a plurality of first terminals inserted into the plurality of first terminal slots, and a top cover attached to a top of the housing. The top cover is rotatably connected to the plurality of first terminals, thereby enabling the top cover to be opened and closed in a rotational manner.

[0006] In accordance with an exemplary embodiment of the present invention, the housing is also formed with a plurality of transversely spaced second terminal slots, and the connector further includes a plurality of second terminals, the plurality of second terminals being inserted into the plurality of second terminal slots, respectively.

[0007] According to another exemplary embodiment of the present invention, the housing is also formed with a circuit board slot for inserting a circuit board, the circuit board slot extending transversely and longitudinally of the housing and communicating with the first plurality of terminal slots and the second plurality of terminal slots.

[0008] According to another exemplary embodiment of the present invention, the connector further comprises a circuit board for insertion into the circuit board slot and for electrical contact with the plurality of first terminals and the plurality of second terminals.

[0009] According to another exemplary embodiment of the present invention, the circuit board is a flexible printed circuit board.

[0010] According to another exemplary embodiment of the present invention, the upper wall of the housing is formed with a plurality of openings communicating with the circuit board slots, and the upper cover is formed with a plurality of protrusions corresponding to the plurality of openings, and when the upper cover is closed, the protrusions are inserted into the openings, and the protrusions are suitable for applying a predetermined pressing force to the circuit board to ensure reliable electrical contact between the circuit board and the second terminal.

[0011] According to another exemplary embodiment of the present invention, the plurality of first terminal slots and the plurality of second terminal slots are arranged in a row along a transverse direction of the housing, and the first terminal slots and the second terminal slots extend along a longitudinal direction and a height direction of the housing.

[0012] According to another exemplary embodiment of the present invention, at least one second terminal slot is present between any two adjacent first terminal slots, and thus at least one second terminal is present between any two adjacent first terminals.

[0013] According to another exemplary embodiment of the present invention, the first terminal includes a connecting portion, which is exposed from the upper wall of the housing and rotatably connected to one side of the upper cover.

[0014] According to another exemplary embodiment of the present invention, the connecting portion is formed with a C-shaped snap slot, one side of the top cover is formed with an insertion slot, and the top cover has a pivot shaft connected between a pair of inner walls of the insertion slot, the connecting portion is inserted into the insertion slot of the top cover, and the pivot shaft is rotatably engaged with the C-shaped snap slot, so that the top cover can rotate around the central axis of the pivot shaft.

[0015] According to another exemplary embodiment of the present invention, the first terminal further comprises a first fixed portion fixed in the first terminal slot and a cantilever portion connected to the first fixed portion and suspended in the first terminal slot, the cantilever portion having a contact protrusion formed at an end thereof, the contact protrusion being used for electrical contact with a circuit board.

[0016] According to another exemplary embodiment of the present invention, the first stationary part comprises an upper support arm, a lower support arm, and a connecting arm connected between a rear end of the upper support arm and a rear end of the lower support arm, and a connecting part connected to a front end of the upper support arm.

[0017] According to another exemplary embodiment of the present invention, the second terminal comprises a second fixed portion fixed in the second terminal slot and a first cantilever portion connected to the second fixed portion and suspended in the second terminal slot, the first cantilever portion having a first electrical contact formed thereon, the first electrical contact being used for electrical contact with an inserted circuit board.

[0018] According to another exemplary embodiment of the present invention, the second terminal further comprises a second cantilever portion connected to the second fixed portion and suspended in the second terminal slot, the second cantilever portion having a second electrical contact formed thereon for making electrical contact with an inserted circuit board.

[0019] According to another exemplary embodiment of the present invention, the first electrical contact and the second electrical contact are spaced apart from one another along the length of the housing, and the first cantilever portion is located below the second cantilever portion.

[0020] According to another exemplary embodiment of the present invention, the top cover includes a cover plate and a resilient buckle formed on the cover plate, and the housing is formed with a snap slot for engaging the resilient buckle to lock the top cover in a closed position.

[0021] According to another exemplary embodiment of the present invention, the cover plate has a first side and a second side opposite each other in a width direction, the first side of the cover plate is rotatably connected to the plurality of first terminals, and an elastic buckle is formed on the second side of the cover plate.

[0022] According to another exemplary embodiment of the present invention, the elastic buckle includes a first elastic buckle, the first elastic buckle is disposed at a central position in a longitudinal direction of the cover plate, and the snap slot includes a first snap slot, the first snap slot is disposed at a central position in a transverse direction of the housing, and is used to engage with the first elastic buckle.

[0023] According to another exemplary embodiment of the present invention, the elastic buckle further includes a pair of second elastic buckles respectively disposed at opposite longitudinal ends of the cover plate, and the snap slot further includes a pair of second snap slots respectively disposed at opposite transverse ends of the housing for engagement with the pair of second elastic buckles.

[0024] According to another exemplary embodiment of the present invention, the first terminal is a ground terminal and the second terminal is a signal terminal.

[0025] In the above-described exemplary embodiment of the present invention, the top cover is rotatably connected to the first terminal, which effectively prevents the top cover from coming off the housing due to vibration.

[0026] In addition, in some exemplary embodiments of the present invention, the top cover applies a predetermined pressing force to the inserted circuit board to ensure reliable electrical contact between the circuit board and the second terminals, thereby ensuring that there is no poor contact between the second terminals and the circuit board in a vibration environment.

[0027] These and other features of the present invention will become apparent from the following detailed description of illustrative embodiments thereof, taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0028] [Figure 1] 1 is an exemplary perspective view of a connector according to an exemplary embodiment of the present invention with a top cover in an open position; [Diagram 2] 1 is an exemplary perspective view of a connector according to an exemplary embodiment of the present invention with a top cover in a closed position. [Diagram 3] 1 is an exemplary perspective view of a connector according to an exemplary embodiment of the present invention, viewed from the front side, with a top cover in a closed position. [Figure 4]2 is an exemplary exploded view of a connector according to an exemplary embodiment of the present invention, with a top cover separated from the housing. [Diagram 5] 2 is an exemplary exploded view of a connector according to an exemplary embodiment of the present invention, with the top cover and terminals separated from the housing. [Figure 6] 1 is an exemplary perspective view of a first terminal of a connector according to an exemplary embodiment of the present invention. [Figure 7] 1 is an exemplary perspective view of a second terminal of a connector according to an exemplary embodiment of the present invention. FIG. [Figure 8] 1 is a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at a first terminal with a top cover in an open position. [Figure 9] 1 is a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at a first terminal with a top cover in a closed position. [Figure 10] 1 is a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at a second terminal with a top cover in an open position. [Figure 11] 1 is a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at a second terminal with a top cover in a closed position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Like reference numerals refer to like elements. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art.

[0030] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form to simplify the drawings.

[0031] In accordance with a general aspect of the present invention, there is provided a connector including a housing defining a plurality of transversely spaced first terminal slots, a plurality of first terminals respectively inserted into the plurality of first terminal slots, and a top cover attached to an upper portion of the housing, the top cover being rotatably connected to the plurality of first terminals to allow the top cover to be rotated open and closed.

[0032] FIG. 1 shows an exemplary perspective view of a connector according to an exemplary embodiment of the present invention with the top cover 4 in an open position. FIG. 2 shows an exemplary perspective view of a connector according to an exemplary embodiment of the present invention with the top cover 4 in a closed position. FIG. 3 shows an exemplary perspective view of a connector according to an exemplary embodiment of the present invention from the front side with the top cover 4 in a closed position. FIG. 4 shows an exemplary exploded view of a connector according to an exemplary embodiment of the present invention with the top cover 4 separated from the housing 3. FIG. 5 shows an exemplary exploded view of a connector according to an exemplary embodiment of the present invention with the top cover 4 and terminals 1 and 2 separated from the housing 3.

[0033] As shown in Figs. 1 to 5, a connector is disclosed in an exemplary embodiment of the present invention. The connector mainly includes a housing 3, a plurality of first terminals 1, and an upper cover 4. A plurality of first terminal slots 31 are formed in the housing 3, and the plurality of first terminal slots 31 are arranged at intervals in a transverse direction X of the housing 3. The plurality of first terminals 1 are inserted into the plurality of first terminal slots 31, respectively. The upper cover 4 is attached to an upper portion of the housing 3. The upper cover 4 is rotatably connected to the plurality of first terminals 1, thereby enabling the upper cover 4 to be opened and closed in a rotational manner.

[0034] FIG. 6 shows an exemplary perspective view of a first terminal 1 of a connector according to an exemplary embodiment of the present invention. FIG. 7 shows an exemplary perspective view of a second terminal 2 of a connector according to an exemplary embodiment of the present invention. FIG. 8 shows a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at the first terminal 1 with the top cover 4 in an open position. FIG. 9 shows a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at the first terminal 1 with the top cover 4 in a closed position. FIG. 10 shows a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at the second terminal 2 with the top cover 4 in an open position. FIG. 11 shows a longitudinal cross-sectional view of a connector according to an exemplary embodiment of the present invention at the second terminal 2 with the top cover 4 in a closed position.

[0035] 1 to 11, in the illustrated embodiment, the housing 3 is also formed with a plurality of second terminal slots 32, the plurality of second terminal slots 32 being spaced apart in the transverse direction X. The connector also includes a plurality of second terminals 2, the plurality of second terminals 2 being inserted into the plurality of second terminal slots 32, respectively.

[0036] As shown in Figures 1 to 11, in the illustrated embodiment, the housing 3 is also formed with a circuit board slot 303 for inserting a circuit board 5, and the circuit board slot 303 extends in the transverse direction X and longitudinal direction Y of the housing 3 and communicates with the multiple first terminal slots 31 and the multiple second terminal slots 32.

[0037] 1 to 11, in the illustrated embodiment, the connector further includes a circuit board 5, which is inserted into the circuit board slot 303 and is in electrical contact with the plurality of first terminals 1 and the plurality of second terminals 2. In an exemplary embodiment of the present invention, the circuit board 5 may be a flexible printed circuit board (FPC).

[0038] 1 to 11, in the illustrated embodiment, a plurality of openings 33 communicating with the circuit board slots 303 are formed in the upper wall of the housing 3, and a plurality of protrusions 43 corresponding to the plurality of openings 33 are formed in the upper cover 4. When the upper cover 4 is closed, the protrusions 43 are inserted into the openings 33, and the protrusions 43 are suitable for applying a predetermined pressing force to the circuit board 5 to ensure reliable electrical contact between the circuit board 5 and the second terminals 2.

[0039] 1 to 11, in the illustrated embodiment, a plurality of first terminal slots 31 and a plurality of second terminal slots 32 are arranged in a row along the transverse direction X of the housing 3. The first terminal slots 31 and the second terminal slots 32 extend along the longitudinal direction Y and height direction Z of the housing 3.

[0040] As shown in Figures 1 to 11, in the illustrated embodiment, there is at least one second terminal slot 32 between any two adjacent first terminal slots 31, and therefore there is at least one second terminal 2 between any two adjacent first terminals 1.

[0041] As shown in Figures 1 to 11, in the illustrated embodiment, the first terminal 1 includes a connection portion 15, which is exposed from the upper wall of the housing 3 and is rotatably connected to one side portion of the upper cover 4.

[0042] 1 to 11, in the illustrated embodiment, a C-shaped snap slot 15c is formed in the connection portion 15. An insertion slot 44 is formed in one side of the upper cover 4, and the upper cover 4 has a pivot shaft 45 connected between a pair of inner walls of the insertion slot 44. The connection portion 15 is inserted into the insertion slot 44 of the upper cover 4, and the pivot shaft 45 is rotatably engaged with the C-shaped snap slot 15c, so that the upper cover 4 can rotate around the central axis of the pivot shaft 45.

[0043] As shown in Figures 1 to 11, in the illustrated embodiment, the first terminal 1 further comprises a first fixed portion 10 and a cantilever portion 14. The first fixed portion 10 is fixed in the first terminal slot 31, for example, by an interference fit. The cantilever portion 14 is connected to the first fixed portion 10 and suspended in the first terminal slot 31. A contact protrusion 14a is formed at the end of the cantilever portion 14, and the contact protrusion 14a is used for electrical contact with the circuit board 5.

[0044] 1 to 11, in the illustrated embodiment, the first fixed part 10 includes an upper support arm 11, a lower support arm 12, and a connecting arm 13. The connecting arm 13 is connected between the rear end of the upper support arm 11 and the rear end of the lower support arm 12. The connecting part 15 is connected to the front end of the upper support arm 11.

[0045] As shown in Figures 1 to 11, in the illustrated embodiment, the second terminal 2 comprises a second fixed portion 20 and a first cantilever portion 21. The second fixed portion 20 is fixed in the second terminal slot 32, for example by an interference fit. The first cantilever portion 21 is connected to the second fixed portion 20 and suspended in the second terminal slot 32. A first electrical contact 21a is formed on the first cantilever portion 21, and the first electrical contact 21a is used for electrical contact with an inserted circuit board 5.

[0046] 1 to 11, in the illustrated embodiment, the second terminal 2 further includes a second cantilever portion 22, which is connected to the second fixed portion 20 and suspended in the second terminal slot 32. A second electrical contact 22a is formed on the second cantilever portion 22, which is used for electrical contact with an inserted circuit board 5.

[0047] As shown in Figures 1 to 11, in the illustrated embodiment, the first electrical contact 21a and the second electrical contact 22a are spaced apart from each other in the longitudinal direction Y of the housing 3, and the first cantilever portion 21 is located below the second cantilever portion 22.

[0048] 1-11, in the illustrated embodiment, the top cover 4 includes a cover plate 40 and elastic buckles 41, 42. The elastic buckles 41, 42 are formed on the cover plate 40. The housing 3 has snap slots 301, 302 formed therein for engaging with the elastic buckles 41, 42 to lock the top cover 4 in a closed position.

[0049] 1 to 11, in the illustrated embodiment, the cover plate 40 has a first side and a second side on opposite sides in the width direction. The first side of the cover plate 40 is rotatably connected to the first terminals 1, and the elastic buckles 41, 42 are formed on the second side of the cover plate 40.

[0050] 1 to 11, in the illustrated embodiment, the elastic buckles 41, 42 include a first elastic buckle 41, which is disposed at a central position in the longitudinal direction of the cover plate 40. The snap slots 301, 302 include a first snap slot 301, which is disposed at a central position in the transverse direction X of the housing 3 and is used to engage with the first elastic buckle 41.

[0051] 1 to 11, in the illustrated embodiment, the elastic buckles 41, 42 further include a pair of second elastic buckles 42, which are respectively disposed at both ends in the longitudinal direction of the cover plate 40. The snap slots 301, 302 also include a pair of second snap slots 302, which are respectively disposed at two ends in the transverse direction X of the housing 3 for engagement with the pair of second elastic buckles 42.

[0052] As shown in Figures 1 to 11, in the illustrated embodiment, the first terminal 1 is a ground terminal and the second terminal 2 is a signal terminal. By rotating the upper cover and connecting it to the ground terminal in this manner, the upper cover is prevented from coming off the housing due to vibration. The upper cover can also apply a predetermined pressing force between the circuit board and the signal terminal to ensure reliable electrical contact between the circuit board and the signal terminal.

[0053] Those skilled in the art will understand that the above embodiments are intended to be illustrative and not limiting. For example, those skilled in the art can make many modifications to the above embodiments, and various features described in different embodiments can be freely combined with each other without causing a discrepancy in structure or principle.

[0054] While several exemplary embodiments have been shown and described, it will be understood that those skilled in the art can make various changes and modifications to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and equivalents thereof.

[0055] As used herein, elements described in the singular preceding the words "a" or "an" should be understood as not excluding a plurality of such elements or steps, unless expressly stated otherwise. Furthermore, references to "one embodiment" of the invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Also, unless expressly stated otherwise, embodiments "comprising" or "having" an element or elements having a particular characteristic may include additional such elements that do not have that characteristic.

Claims

1. A connector, a housing (3) having a plurality of first terminal slots (31) spaced apart in a transverse direction (X); a plurality of first terminals (1) respectively inserted into the plurality of first terminal slots (31); An upper cover (4) attached to the top of the housing (3); Equipped with The upper cover (4) is rotatably connected to the plurality of first terminals (1), thereby enabling the upper cover (4) to be opened and closed in a rotational manner.

2. The housing (3) also defines a plurality of second terminal slots (32) spaced apart in the transverse direction (X); 2. The connector according to claim 1, further comprising a plurality of second terminals (2), the plurality of second terminals (2) being inserted into the plurality of second terminal slots (32), respectively.

3. 3. The connector of claim 2, wherein the housing (3) is also formed with a circuit board slot (303) for inserting a circuit board (5), the circuit board slot (303) extending in the transverse direction (X) and the longitudinal direction (Y) of the housing (3) and communicating with the plurality of first terminal slots (31) and the plurality of second terminal slots (32).

4. 4. The connector of claim 3, further comprising a circuit board (5) inserted into said circuit board slot (303) and in electrical contact with said plurality of first terminals (1) and said plurality of second terminals (2).

5. The connector according to claim 4, wherein the circuit board (5) is a flexible printed circuit board.

6. A plurality of openings (33) communicating with the circuit board slots (303) are formed on the upper wall of the housing (3), and a plurality of protrusions (43) corresponding to the plurality of openings (33) are formed on the upper cover (4); 4. The connector according to claim 3, wherein when the upper cover (4) is closed, the projection (43) is inserted into the opening (33), and the projection (43) is suitable for applying a predetermined pressing force to the circuit board (5) to ensure reliable electrical contact between the circuit board (5) and the second terminal (2).

7. the first terminal slots (31) and the second terminal slots (32) are arranged in a row along the transverse direction (X) of the housing (3); 3. The connector according to claim 2, wherein the first terminal slot (31) and the second terminal slot (32) extend along a longitudinal direction (Y) and a height direction (Z) of the housing (3).

8. 8. The connector of claim 7, wherein at least one second terminal slot (32) is present between any two adjacent first terminal slots (31), such that at least one second terminal (2) is present between any two adjacent first terminals (1).

9. 4. The connector of claim 3, wherein the first terminal (1) has a connection portion (15), the connection portion (15) being exposed from a top wall of the housing (3) and rotatably connected to one side of the top cover (4).

10. A C-shaped snap slot (15c) is formed in the connection portion (15), an insertion slot (44) is formed in one side of the upper cover (4), and the upper cover (4) has a pivot shaft (45) connected between a pair of inner walls of the insertion slot (44); 10. The connector of claim 9, wherein the connection portion (15) is inserted into the insertion slot (44) of the upper cover (4), and the pivot shaft (45) is rotatably engaged with the C-shaped snap slot (15c), thereby allowing the upper cover (4) to rotate around the central axis of the pivot shaft (45).

11. The first terminal (1) is a first fixing portion (10) fixed to the first terminal slot (31); a cantilever portion (14) connected to the first fixed portion (10) and suspended in the first terminal slot (31); Further equipped with 10. The connector according to claim 9, wherein a contact protrusion (14a) is formed at an end of the cantilever portion (14), the contact protrusion (14a) being used for electrical contact with the circuit board (5).

12. The first fixing portion (10) is An upper support arm (11); A lower support arm (12); a connecting arm (13) connected between the rear end of the upper support arm (11) and the rear end of the lower support arm (12); Equipped with The connector according to claim 11, wherein the connection portion (15) is connected to a front end of the upper support arm (11).

13. The second terminal (2) is a second fixing portion (20) fixed to the second terminal slot (32); a first cantilever portion (21) connected to the second fixed portion (20) and suspended in the second terminal slot (32); Equipped with 4. The connector of claim 3, wherein the first cantilever portion (21) is formed with a first electrical contact (21a), the first electrical contact (21a) being used for electrical contact with the inserted circuit board (5).

14. The second terminal (2) is a second cantilever portion (22) connected to the second fixed portion (20) and suspended in the second terminal slot (32); 14. The connector of claim 13, wherein the second cantilever portion (22) is formed with a second electrical contact (22a), the second electrical contact (22a) being used for electrical contact with the inserted circuit board (5).

15. 15. The connector of claim 14, wherein the first electrical contact (21a) and the second electrical contact (22a) are spaced apart from each other in the longitudinal direction (Y) of the housing (3), and the first cantilever portion (21) is located below the second cantilever portion (22).

16. The upper cover (4) is A cover plate (40); Elastic buckles (41, 42) formed on the cover plate (40); Equipped with 2. The connector of claim 1, wherein the housing (3) is formed with snap slots (301, 302) for engaging with the elastic buckles (41, 42) to lock the top cover (4) in a closed position.

17. 17. The connector of claim 16, wherein the cover plate (40) has a first side and a second side on opposite sides in a width direction, the first side of the cover plate (40) is rotatably connected to the plurality of first terminals (1), and the elastic buckles (41, 42) are formed on the second side of the cover plate (40).

18. The elastic buckles (41, 42) include a first elastic buckle (41), the first elastic buckle (41) being disposed at a central position in the longitudinal direction of the cover plate (40); 18. The connector of claim 17, wherein the snap slots (301, 302) include a first snap slot (301), which is disposed at a central position in the transverse direction (X) of the housing (3) and is used to engage with the first elastic buckle (41).

19. The elastic buckles (41, 42) further include a pair of second elastic buckles (42) disposed at both ends of the cover plate (40) in the longitudinal direction, respectively; 19. The connector of claim 18, wherein the snap slots (301, 302) further include a pair of second snap slots (302) respectively disposed at both ends of the housing (3) in the transverse direction (X) for engagement with the pair of second elastic buckles (42).

20. 16. The connector according to any one of claims 2 to 15, wherein the first terminal (1) is a ground terminal and the second terminal (2) is a signal terminal.

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