Electric connector

Abstract

An electric connector comprises an insulator, the insulator is provided with a matching surface and a mounting surface which are opposite to each other, the insulator is provided with a plurality of terminal grooves which are arranged in an array and penetrate through the matching surface and the mounting surface, and each terminal groove is provided with a fixing groove and an accommodating hole which are communicated with each other; each terminal comprises a fixing part fixed in the fixing groove, a matching part and a cable contact surface, each accommodating hole is provided with a semicircular part when viewed from the matching direction of the electric connector, the terminal is suitable for being matched with a welding ball or a cable, and when the terminal is connected with the cable, the matching part is matched with the welding ball or the cable. And the conductive end of the cable is inserted into the receiving hole and is positioned between the semicircular part and the corresponding cable contact surface.

Description

Technical Field

[0001] The present invention relates to an electric connector. Background Art

[0002] Related prior art to the present invention can be found in CN216120831U, which discloses a wire-to-board connector comprising a plastic body with a plurality of receiving holes and terminals mounted to each of the holes. Each terminal comprises a main body, elastic arms extending upward and downward from the main body, and a soldering portion. An interposer is disposed beneath the plastic body. The upper surface of the interposer is provided with a plurality of first solder pads for contacting the terminal soldering portions, and the lower surface of the interposer is provided with a plurality of second solder pads for connecting cables. This wire-to-board connector requires the interposer to achieve conductivity, resulting in a relatively complex overall structure.

[0003] Therefore, it is necessary to provide a new electrical connector to solve the above problems. Summary of the Invention

[0004] An object of the present invention is to provide an electrical connector having an improved terminal slot.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: an electrical connector, provided with a mating direction, which includes an insulator and a plurality of terminals, the insulator having a mating surface, a mounting surface and terminal slots arranged in a matrix, the terminal slots passing through the mating surface and the mounting surface, each of the terminal slots having a retaining groove and a receiving hole that penetrate each other; the terminal includes a retaining portion installed in the retaining groove, a mating portion and a cable contact surface located in the receiving hole, wherein, viewed from the mating direction, each receiving hole includes a semicircular portion, the semicircular portion and the corresponding cable contact surface are arranged face to face with each other to form a cable positioning space therebetween.

[0006] Compared with the prior art, the present invention has the following beneficial effects: the semicircular portion of the terminal slot can be used to clamp the cable, achieving direct contact between the cable and the terminal without the aid of an intermediate board, simplifying the installation steps and facilitating miniaturization of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a cross-sectional view of an electrical connector assembly according to a first embodiment of the present invention; Figure 2 yes Figure 1 A perspective view of a first electrical connector and a second electrical connector of an electrical connector assembly, wherein the first and second electrical connectors are separated from each other and a row of terminals are removed Figure 3 yes Figure 2 A three-dimensional view of the CEC connector assembly from another angle; Figure 4 yes Figure 2Exploded perspective view of the two unassembled rows of terminals separated from the solder balls; Figure 5 yes Figure 4 A three-dimensional view of the first electrical connector terminal from another angle; Figure 6 yes Figure 4 a bottom view of the first electrical connector; Figure 7 is a perspective view of a first electrical connector according to a second embodiment of the present invention, wherein a row of terminals and cables are removed; Figure 8 yes Figure 7 Exploded view of the terminal and cable; Figure 9 yes Figure 7 A perspective view of the first electrical connector from another angle; Figure 10 yes Figure 9 a bottom view of the first electrical connector; Figure 11 yes Figure 7 A cross-sectional view of the first electrical connector along line AA; Figure 12 is a perspective view of a first electrical connector according to a third embodiment of the present invention, wherein a row of terminals and cables are removed; Figure 13 yes Figure 12 A perspective view of the first electrical connector from another angle; Figure 14 yes Figure 13 a bottom view of the first electrical connector; and Figure 15 yes Figure 12 Cross-sectional view of the first electrical connector along line BB.

[0008] Description of main component symbols 100, 100A, 100B: first electrical connector 213: mating portion 10, 30: Insulator 22, 41: Holding part 11: Accommodation cavity 222: Side 121, 321: docking surface 23, 42: plate mounting portion 122, 322: mounting surface 411: mating surface 13, 14, 33: terminal slot 412: barb 131, 141, 331: Retaining groove 200: Second electrical connector 132, 142, 332: receiving hole 51: cable 1321, 1421: semicircular portion 511: conductive end 1422: Rectangular portion 52, 53: Solder ball 1322: Straight portion X: First direction 20, 20A, 20B, 40: Terminal Y: Second direction 21, 21B: Elastic arm W: diagonal direction 211: vertical portion 24: elastic pin 212: arc-shaped portion 241: protruding portion The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0009] See also Figures 1 to 6 The figure shows an electrical connector assembly according to a first embodiment of the present invention. The assembly includes a first electrical connector 100 and a second electrical connector 200. The first electrical connector 100 has a receiving cavity 11 for receiving the second electrical connector 200 to achieve a connection between the two connectors. The first and second electrical connectors each include an insulator having a mating surface and a plurality of terminals fixed in the insulator, with a defined mating direction.

[0010] See also Figures 2 to 3 , the receiving cavity 11 is recessed inward from the mating surface 121 of the insulator 10 of the first electrical connector 100. The terminal slot 13 passes through the first mounting surface 122 and the mating surface 121. In this embodiment, the mounting surface 122 is located on the upper surface of the insulator 10, and the mating surface 121 is located on the lower surface of the insulator 10, that is, the mating surface and the mounting surface are arranged opposite to each other. The insulator 30 of the second electrical connector 200 has several rows of terminal slots 33 that pass through the mating surface 321 and the mounting surface 322. In this embodiment, the mounting surface 322 is located on the lower surface of the insulator 30, and the mating surface 321 is located on the upper surface of the insulator 30, that is, the mating surface 321 and the mounting surface 322 are arranged opposite to each other. The mounting surfaces 122 and 322 are respectively adapted to the corresponding circuit boards.

[0011] See also Figures 4 to 5 The terminal 20 of the first electrical connector 100 includes a retaining portion 22, an elastic arm 21 extending from one end of the retaining portion 22, and a board mounting portion 23 extending from the other end of the retaining portion 22. The board mounting portion 23 is fixed to the printed circuit board through the solder ball 52. The elastic arm 21 has a matching portion 213. In this embodiment, the elastic arm 21 includes a vertical portion 211 bent from the retaining portion 22 and an arc-shaped portion 212 extending from the vertical portion. The arc-shaped portion 212 and the vertical portion 211 protrude in two opposite directions. The matching portion 213 is located at the top of the arc-shaped portion 212 and has a matching surface perpendicular to the matching direction. The matching portion 213 and the first retaining portion 22 are approximately located on a vertical straight line. See Figures 2 to 3The terminal slot 13 includes a holding slot 131 and a receiving hole 132 that are interconnected. The holding portion 22 is held in the holding slot 131, and the lower portion of the elastic arm 21 extends into the receiving hole 132. Figure 1 As shown, the upper portion of the elastic arm 21 where the matching portion 213 is located is exposed in the receiving cavity 11 .

[0012] The terminal slot 33 of the second electrical connector 200 also includes a retaining slot 331 and a receiving hole 332. The second terminal 40 is sheet-shaped and includes a retaining portion 41 and a board mounting portion 42. A mating plane 411 is formed on one side of the retaining portion 41, and barbs 412 are provided on both side edges. The board mounting portion 42 is fixed to the circuit board through a solder ball 53. The retaining portion 41 interferes with the retaining slot 331, and the mating plane 411 faces the receiving hole 332. After the first and second electrical connectors are mated with each other, the insulator 30 is received in the receiving cavity 11, the elastic arm 21 is inserted into the receiving hole 322, and the mating portion 213 contacts the mating plane 411 of the terminal 40. As Figure 1 As shown, the elastic arm 21 is arranged obliquely in the receiving hole 332 of the insulator 30 .

[0013] like Figure 1 and Figure 6 As shown, the insulator 10 extends in the height or docking direction, and the longitudinal direction / first direction X and the transverse direction / second direction Y are perpendicular to each other. The terminal slots 13 are arranged in a matrix along the longitudinal direction X and the transverse direction Y. Figure 6 As shown, when viewed from the mating direction, each row of retaining grooves 131 is arranged along the longitudinal direction X, and multiple rows of retaining grooves 131 are arranged side by side along the transverse direction Y. Each retaining groove 131 extends along the diagonal direction W, wherein the diagonal direction W is set at an angle to the longitudinal direction X and the transverse direction Y. The direction of the receiving hole 132 is perpendicular to the first retaining groove 131. The retaining portion 22 is also set along the diagonal direction W. Figure 1 As shown, the plate mounting portion 23 is located directly below the receiving hole 132 .

[0014] See also Figures 7 to 11 , the first electrical connector 100A in the second embodiment of the present invention has an insulator that is consistent with that in the first embodiment, and its terminal 20A is also basically similar to that in the first embodiment. The terminal 20A is not provided with a first plate mounting portion but is in contact with the cable 51. The retaining portion 22 is interference-fixed in the retaining groove 131, and a side surface 222 of the retaining portion 22 is exposed in the first receiving hole 132. The conductive end 511 of the cable 51 is inserted into the receiving hole 132 and contacts the side surface 222 of the retaining portion 22. The conductive end 511 can be welded to the retaining portion 22 to further improve stability. Each row of cables 51 is arranged in the longitudinal direction, and multiple rows of cables 51 are arranged side by side in the transverse direction. All cables 51 extend in the transverse direction away from the insulator 10.

[0015] It can be understood that the insulator provided with the terminal slot 13 can be applied to a board-end connector or a line-end connector. Figure 10 As shown, the receiving hole 132 includes a semicircular portion 1321. When the terminal is not provided with pins, the semicircular portion 1321 can be used to accommodate the conductive end 511 of the cable, thereby electrically connecting the terminal to the cable. Viewed from the mating direction, the contour of the receiving hole 132 includes the semicircular portion 1321 and two straight portions 1322 connecting the two ends of the semicircular portion 1321. The conductive end 511 of the cable is sandwiched between the semicircular portion 1321 and the side surface 222 of the retaining portion 22. In this embodiment, the retaining portion 22 has a cable contact surface. Thus, when the conductive end 511 is in the corresponding receiving hole, it is initially positioned by the semicircular portion 1321 and the side surface 222 of the retaining portion 22. In other words, the semicircular portion and the cable contact surface are arranged face-to-face to form a cable positioning space. As can be seen from the first and second embodiments, the terminal slot with a semicircular portion can be used for terminals for soldering cables or terminals for soldering to circuit boards. This allows the same mold to be used, reducing product development costs.

[0016] See also Figures 12 to 15 The first electrical connector 100B in the third embodiment of the present invention has a plurality of terminal slots 14 that pass through the mating surface 121 and the mounting surface 122. The terminal 20B includes a retaining portion 22 that interferes with the retaining slot, and an elastic arm 21B and an elastic pin 24 that extend from both ends of the retaining portion 22. The elastic arm 21B is provided with a matching portion 213 and the mating surface 121 is exposed to the outside of the insulator 10. The elastic pin 24 extends into the receiving hole 142 and forms a protrusion 241 near the free end. The protrusion 241 faces the first receiving hole 142, that is, it protrudes toward the receiving hole 142. The conductive end 511 inserted into the receiving hole 142 is retained by the interference of the protrusion 241 and the inner wall of the receiving hole 142, and is clamped between the two. It should be noted that the receiving hole 132 does not extend downward through the first mounting surface 122. The semicircular portion 1421 of the receiving hole is located above the retaining groove 141. The protrusion 241 interferes with the rectangular portion 1422 within the receiving hole and faces the semicircular portion 1421 of the receiving hole 142. In this embodiment, the elastic pin has a cable contact surface that presses against the conductive end of the cable. The conductive end of the cable is initially retained in the receiving hole by the semicircular portion and the cable contact surface.

[0017] The above descriptions are only some embodiments of the present invention, not all embodiments. Any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the specification of the present invention are covered by the claims of the present invention.

Claims

1. An electrical connector having a mating direction, comprising an insulator and a plurality of terminals, the insulator having a mating surface, a mounting surface, and terminal slots arranged in a matrix, the terminal slots extending through the mating surface and the mounting surface, each terminal slot having a interconnected retaining groove and a receiving hole; the terminals comprising a retaining portion retained in the retaining groove, a mating portion, and a cable contact surface disposed facing the receiving hole, characterized in that: Viewed from the mating direction, each receiving hole includes a semicircular portion, and the semicircular portion and the cable contact portion are arranged face to face with each other to form a cable positioning space.

2. The electrical connector according to claim 1, wherein: The electrical connector further includes a cable, one end of the cable includes a bare conductive end, and the conductive end of the cable is located between the semicircular portion and the cable contact surface and contacts each other.

3. The electrical connector according to claim 1, wherein: The terminal includes a board mounting portion extending out of the mounting surface, and one side of the retaining portion forms the cable contact surface.

4. The electrical connector according to claim 3, wherein: The insulator is provided with a receiving cavity. Each of the terminals includes an elastic arm extending into the receiving cavity and a matching surface. The matching surface is perpendicular to the matching direction.

5. The electrical connector according to claim 4, wherein: The elastic arm includes a vertical portion extending from the holding portion and an arc-shaped portion extending from the vertical portion. The vertical portion and the holding portion are staggered. Both the vertical portion and the arc-shaped portion protrude perpendicular to the mating direction, and the protruding directions of the two are opposite.

6. The electrical connector according to claim 1, wherein: The semicircular portion is located directly opposite to the holding groove.

7. The electrical connector according to claim 1, wherein: The terminal includes an elastic pin located in the receiving hole, and the cable contact surface is formed on the corresponding elastic pin.

8. The electrical connector according to claim 6, wherein: The elastic pin extends from the holding portion. The elastic pin has a protruding portion protruding toward the semicircular portion. The cable contact surface is located on the protruding portion.

9. The electrical connector according to claim 7, wherein: The retaining groove does not penetrate the mounting surface, and the semicircular portion is located above the corresponding retaining groove.

10. The electrical connector according to claim 1, wherein: The receiving hole has two straight line portions connecting two ends of the semicircular portion.

11. The electrical connector according to claim 1, wherein: Viewed from the mating direction, the retaining grooves are arranged in a matrix along first and second directions perpendicular to each other, each retaining groove is arranged along the diagonal of the first and second directions, the receiving hole is perpendicular to the retaining groove, and the cable extends along the second direction.

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