Electric connector

Abstract

The utility model relates to and discloses an electric connector, which comprises a plastic main body provided with an insertion cavity and a metal terminal, the metal terminal comprises a welding end, an insertion section and a butt joint end, the insertion section comprises a basic section and an abutting section connected between the basic section and the welding end, and the periphery of the basic section is convexly provided with a close-fitting part; the insertion cavity comprises a first insertion cavity, a second insertion cavity and an insertion groove, wherein the abutting section abuts against the first insertion cavity to limit the insertion depth, the basic section is tightly matched with the second insertion cavity, and the insertion groove is communicated with the second insertion cavity and used for the butt joint end to be inserted into. The base section and the abutting section are arranged, so that the base section is in close fit with the plugging cavity through the close-fitting part to ensure the stability of the base, and the abutting section is matched with the first plugging cavity to limit the plugging depth of the whole metal terminal, thereby preventing the metal terminal from excessively extending into the slot in the use process to influence the connection with a complementary terminal. Therefore, the stability between the metal terminal and the complementary terminal is improved.

Description

Technical Field

[0001] This utility model relates to an electrical connector. Background Technology

[0002] Electrical connectors are widely used in electronics, electrical appliances, and instruments. Their function is to act as a bridge connecting interrupted circuits or independent circuits, undertaking the task of transmitting current or signals; or they can be used in conjunction with electrical terminals to form board-to-wire connections; they can also be used independently for board-to-board connections. Electrical connectors are widely used in various fields, such as automobiles and electric vehicles, to connect various electrical components.

[0003] Metal terminals, a crucial component of electrical connectors, are widely used in circuit board connections. They act as bridges between blocked or isolated circuits, facilitating the transmission of current or signals. The metal terminal inserts into the plastic body of the connector. One end mates with the complementary terminal of a complementary connector, called the mating end, while the other end is mounted on the circuit board, called the soldering end. The soldering end is typically soldered to the circuit board. To facilitate alignment with the circuit board, the soldering end is usually bent in the appropriate direction after exiting the plastic body, allowing for easy soldering.

[0004] Existing metal terminals include an insertion section between the solder end and the mating end. This insertion section is used to insert into the plastic body to complete the assembly of the metal terminal and the plastic body. To ensure that the metal terminal inserted into the plastic body can be stably inserted, protruding fastening parts are usually provided on both sides of the insertion section to press against the plastic body. However, for the installation of the metal terminal and the mating end and the cooperation between the complementary terminal, the cavity for installing the metal terminal is usually a through-hole structure. Even with the fastening parts, under sufficient external pressure, the mating section can still easily move towards the complementary electrical connector side, which greatly affects the cooperation between the metal terminal and the complementary terminal. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an electrical connector to solve the problem of poor stability of the tight fit part on the metal terminal.

[0006] To solve the above-mentioned technical problems, the present invention provides an electrical connector comprising a plastic body having a mating cavity along the mating direction and metal terminals. The metal terminals include a soldering end, a mating section, and a mating end connected sequentially. The mating section includes a base section and a supporting section connected between the base section and the soldering end, with a width greater than that of the base section. The outer periphery of the base section is provided with a tight-fitting portion for abutting against the mating cavity. The mating cavity includes a first mating cavity in which the supporting section abuts to limit the mating depth, a second mating cavity in which the base section is tightly fitted, and a slot communicating with the second mating cavity and into which the mating end is inserted.

[0007] Furthermore, the abutting section has two protruding areas exposed on both sides of the base section in the lateral direction. The two protruding areas form abutting surfaces on one side facing the docking end, and a finite positioning surface is formed on the first insertion cavity corresponding to the two abutting surfaces.

[0008] Furthermore, the two abutment surfaces each form a rounded corner with the two sides of the base section.

[0009] Furthermore, the limiting surface has a relief slope formed at the position corresponding to the rounded corner, which extends into the second insertion cavity to avoid the rounded corner.

[0010] Furthermore, the two convex regions are respectively provided with recessed clearance spaces between the side of the welding end and the two sides of the welding end along the insertion direction.

[0011] Furthermore, the first insertion cavity penetrates the plastic body along the insertion direction to form a first through-hole. Guide blocks are provided on both sides of the first through-hole corresponding to the two convex areas. On the opposite side of the two guide blocks, a guide slope is formed that gradually narrows toward the first insertion cavity.

[0012] Furthermore, the welding end includes a horizontally extending section distributed along the insertion direction away from the docking end, a first bent section formed by bending the horizontally extending section, and a second bent section formed by bending the first bent section; a support plate is formed on the plastic body at a position corresponding to the first bent section, extending along the insertion direction, and a limiting groove is provided on the support plate along the width direction of the plastic body for supporting and engaging the first bent section.

[0013] Furthermore, the plastic body has support columns protruding along the insertion direction on both sides of the support plate along the length of the plastic body. The support plate is recessed between the two support columns to form a reserved space for the second bending section to pass through. The reserved space includes a first reserved cavity segment communicating with the side away from the plastic body along the insertion direction and a second reserved cavity segment communicating with the first reserved cavity segment and communicating with the side away from the insertion cavity along the width direction of the plastic body. The plastic body has a bonding surface communicating with the reserved space for bonding with the circuit board.

[0014] Furthermore, a soldering tab for soldering to the circuit board is inserted into the bonding surface and protrudes from the side opposite to the plastic body.

[0015] Furthermore, the slot extends through the plastic body along the insertion direction toward the side away from the support plate to form a second through-hole.

[0016] The electrical connector of this utility model has at least the following beneficial effects: by setting a base section and a retaining section, the base section is tightly fitted into the insertion cavity through the tight fitting part to ensure the stability of the base, while the retaining section cooperates with the first insertion cavity to limit the insertion depth of the entire metal terminal, so as to avoid the metal terminal from affecting the connection with the complementary terminal due to excessive insertion into the slot during use, thereby improving the stability between the metal terminal and the complementary terminal. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the electrical connector of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the electrical connector of this utility model from another angle;

[0020] Figure 3 This is a structural schematic diagram of the electrical connector of this utility model from another angle;

[0021] Figure 4 This is a top cross-sectional view of the electrical connector of this utility model;

[0022] Figure 5 for Figure 4 An enlarged view of part A shown;

[0023] Figure 6 This is an exploded view of the electrical connector of this utility model;

[0024] Figure 7 for Figure 6 An enlarged view of part B shown.

[0025] The meanings of the labels in the attached diagram are as follows:

[0026] Plastic body 1, insertion cavity 11, first through hole 111, second through hole 112, first insertion cavity 113, limiting surface 1131, avoidance slope 1132, second insertion cavity 114, slot 115, anti-fooling block 116, avoidance groove 117, anti-fooling groove 118, bonding surface 12, welding pull tab 13, first section 131, second section 132, welding foot 133, protrusion 134, mounting groove 14, support plate 151, limiting groove 152, support column 153, Reserved space 16, First reserved cavity 161, Second reserved cavity 162, Guide block 17, Guide slope 171, Metal terminal 2, Welding end 21, Horizontal extension section 211, First bending section 212, Second bending section 213, Insertion section 22, Base section 221, Fitting part 2211, Supporting section 222, Outward protrusion area 2221, Supporting surface 2222, Rounded corner 2223, Clearance space 2224, Butt joint end 23. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Please refer to Figures 1 to 7 The electrical connector of this utility model includes a plastic body 1 with a mating cavity 11 along the mating direction and metal terminals 2. The metal terminals 2 are usually configured as multiple and are respectively used to be inserted into the mating cavity 11. The plastic body 1 protects and supports the metal terminals 2 installed in the mating cavity 11. The plastic body 1 also plays a role in strengthening the connection stability and preventing mistake when the electrical connector is connected to a complementary electrical connector. The metal terminals 2 are used to be mated with the complementary terminals of the complementary electrical connector to realize the transmission of electrical signals after power is applied.

[0029] In this embodiment, the plastic body 1 is injection molded from plastic and has an overall cuboid structure. Thus, the plastic body 1 has length, width, and height, corresponding to the length, width, and height directions, respectively. The height direction of the plastic body 1 is configured as the insertion direction, and the metal terminals 2 are inserted into the insertion cavities 11 along the insertion direction. When the electrical connector mates with the complementary electrical connector, the connection is also made along the insertion direction. In this embodiment, there are multiple insertion cavities 11 corresponding to the number of metal terminals 2. The multiple insertion cavities 11 are distributed sequentially and equally spaced along the length direction of the plastic body 1, so that each metal terminal 2 is inserted into each insertion cavity 11 in a one-to-one correspondence; that is, each insertion cavity 11 contains one metal terminal 2. To facilitate the insertion of the metal terminal 2 into the insertion cavity 11, and to facilitate the mating of the electrical connector with the complementary electrical connector along the insertion direction, each insertion cavity 11 extends through both sides of the plastic body 1 along the insertion direction, forming multiple first through holes 111 and multiple second through holes 112 on the two sides of the plastic body 1 through which the plastic body 1 is extended. The first through holes 111 and the second through holes 112 are connected to the insertion cavity 11 along the insertion direction. The metal terminal 2 enters the insertion cavity 11 through the first through hole 111, and the complementary terminal enters the insertion cavity 11 through the second through hole 112 to mat with the metal terminal 2.

[0030] In this embodiment, the insertion cavity 11 includes, in sequence along the insertion direction, a first insertion cavity 113, a second insertion cavity 114, and a slot 115. The first insertion cavity 113 is located near and connected to the first through-hole 111, and the slot 115 is located near and connected to the second through-hole 112. To facilitate the insertion and mating between the plastic body 1 and the complementary electrical connector, the slots 115 of each insertion cavity 11 are interconnected along the length of the plastic body 1, forming a mating cavity for the female connector to be inserted into. The mating cavity is rectangular in shape and extends along the insertion direction through one side of the plastic body 1 with the second through-hole 112, allowing the second through-holes 112 to be interconnected and open. To increase the mating stability between the mating cavity and the complementary electrical connector, at least one anti-misalignment block 116 is protruding on one side wall of the mating cavity. Each anti-misalignment block 116 extends along the mating direction to the second through-hole 112, and the side of each anti-misalignment block 116 away from the first through-hole 111 is flush with the side of the plastic body 1 with the second through-hole 112. Corresponding anti-misalignment grooves are provided on the complementary electrical connector for each anti-misalignment block 116. The anti-misalignment effect during mating increases the stability between the plastic body 1 and the complementary electrical connector. To reduce the adverse effects of friction between the anti-misalignment blocks 116 and the complementary electrical connector during mating, clearance grooves 117 are provided on the plastic body 1, respectively connecting the second through-hole 112 and the mating cavity. The clearance grooves 117 are located on the side of the mating cavity where the anti-misalignment blocks 116 are formed and between the anti-misalignment blocks 116. A slot is formed on the side of the plastic body 1 facing the clearance groove 117 along the width direction, corresponding to the clearance groove 117, to reduce interference with the complementary electrical connector and relatively reduce material usage. In another embodiment, a foolproof groove 118 is recessed on the other cavity wall of the mating cavity. The foolproof groove 118 extends through the side of the plastic body 1 with the second through-hole 112 along the mating direction. A matching foolproof protrusion is provided on the complementary electrical connector corresponding to the foolproof groove 118 to further improve the foolproof effect between the electrical connector and the complementary electrical connector.

[0031] In this embodiment, a bonding surface 12 is provided on one side of the plastic body 1 along its width direction. The bonding surface 12 is a plane and is used to bond with the circuit board. After the circuit board is bonded to the bonding surface 12, it is soldered to one end of the metal terminal 2. In order to increase the connection between the circuit board and the plastic body 1, a solder pull tab 13 is inserted into the bonding surface 12, extending out of the bonding surface 12 along the width direction of the plastic body 1. After the circuit board is bonded to the bonding surface 12 and soldered to the metal terminal 2, the part of the solder pull tab 13 that extends out of the bonding surface 12 is used to pass through the circuit board and be soldered to the circuit board, thereby pulling the circuit board and preventing the circuit board from detaching from the plastic body 1 after the connection between the circuit board and the metal terminal 2 is broken. Specifically, mounting grooves 14 are provided on both sides of the plastic body 1 along its length direction and along its width direction. The mounting grooves 14 are generally T-shaped and have a wide section and a narrow section along the width direction of the plastic body 1. The narrow section is close to and passes through the bonding surface 12, while the wide section is located away from the bonding surface 12 and passes through the side of the plastic body 1 facing away from the bonding surface 12. To fit the mounting grooves 14, the welding pull tab 13 includes a first section 131 for inserting into the narrow section and a second section 132 for inserting into the wide section. The first section 131 and the second section 132 are generally T-shaped. A solder foot 133 is provided on the side of the first segment 131 away from the second segment 132 along the width direction of the plastic body 1. When the first segment 131 is inserted into the narrow segment, the solder foot 133 protrudes out of the narrow segment and extends out of the plastic body 1 away from the bonding surface 12. When the circuit board is bonded to the bonding surface 12, the solder foot 133 is soldered to the circuit board. The second segment 132 is inserted into the wide segment and abuts against the inner wall of the wide segment that connects to the narrow segment. Symmetrically distributed protrusions 134 are provided on two opposite sides of the second segment 132. When the second segment 132 is inserted into the wide segment, the protrusions 134 on both sides abut against the inner walls of the two sides of the wide segment.

[0032] In this embodiment, the metal terminal 2 includes a welding end 21, an insertion section 22, and a mating end 23 connected in sequence. The mating end 23 is used to pass through the first through-hole 111 into the slot 115 for mating connection with the complementary terminal to realize the conduction of electrical signals. The insertion section 22 is used to be inserted into the first insertion cavity 113 and the second insertion cavity 114, and the insertion section 22 is tightly fitted to realize the connection between the metal terminal 2 and the plastic body 1. The welding end 21 is located on the plastic body 1, extending outward and flush with the mating surface 12. The circuit board realizes the electrical connection between the circuit board and the metal terminal 2 by welding with the welding end 21.

[0033] In this embodiment, the welding end 21 includes a horizontally extending segment 211 distributed along the insertion direction away from the mating end 23, a first bent segment 212 formed by bending the horizontally extending segment 211, and a second bent segment 213 formed by bending the first bent segment 212. The horizontally extending segment 211 and the first bent segment 212 facilitate mutual support with the plastic body 1, and the second bent segment 213 is used to be flush with the bonding surface 12 for welding to the circuit board. The first bent segment 212 extends along the width direction of the plastic body 1 after being bent from the horizontally extending segment 211, and includes a wide end connected to the horizontally extending segment 211 and having the same width as the horizontally extending segment 211, and a narrow end connected to the second bent segment 213 and having the same width as the second bent segment 213. The width of the narrow end is smaller than the width of the wide end. The wide end and the horizontally extending segment 211 ensure the strength between the welding end 21 and the insertion segment 22, and the narrowing of the narrow end and the second bent segment 213 makes it easier to weld to the circuit board.

[0034] In this embodiment, since the welding end 21 is exposed outside the plastic body 1, in order to reduce the possibility of the welding end 21 being deformed by collision with the outside, a support plate 151 is formed on the side surface of the plastic body 1 where the first through hole 111 is provided, corresponding to the position of the first bending section 212, and extends along the insertion direction. The support plate 151 is directly opposite the narrow end of the first bending section 212 along the insertion direction. A limiting groove 152 is recessed on the side of the support plate 151 away from the plastic body 1 along the width direction of the plastic body 1. The limiting groove 152 is connected to the side away from the plastic body 1 along the insertion direction and passes through the support plate 151 along the width direction of the plastic body 1, so that the narrow end of the first bent section 212 can be inserted into it along the insertion direction. After the insertion section 22 is inserted into the first insertion cavity 113 and the second insertion cavity 114, the first bent section 212 is inserted into or stuck into the limiting groove 152 and abuts against the groove wall of the limiting groove 152, so that the limiting groove 152 supports and limits the welding end 21. The horizontal extension section 211 and the wide end are located on the side of the support plate 151, and the support plate 151 surrounds the horizontal extension section 211 inside it. To enhance the strength of the support plate 151, support columns 153 are provided on both sides of the plastic body 1 along the length of the plastic body 1, protruding in the insertion direction. The support columns 153 protrude from the support plate 151 in the direction away from the plastic body 1, and the two support columns 153 enclose the horizontal extension section 211 within the support plate 151, thus increasing the strength of the support plate 151. The support plate 151 is recessed between the two support columns 153, and is located closer to the mating surface 12. A reserved space 16 is formed between the support plate 151 and the side of the two support columns 153 facing the mating surface 12, allowing the second bending section 213 to pass through. The reserved space 16 includes a first reserved cavity section 161 communicating in the insertion direction towards the side away from the plastic body 1, and a second reserved cavity section 162 communicating in the first reserved cavity section 161 and in the width direction of the plastic body 1 towards the side away from the insertion cavity 11. The first reserved cavity 161 is formed by two support columns 153 and a support plate 151 enclosing the side away from the plastic body 1 along the insertion direction; the second reserved cavity 162 is formed by the support plate 151 being recessed relative to the mating surface 12 and enclosing the part of the support plate 151 and the two support columns 153 close to the mating surface 12. The second reserved cavity 162 penetrates the mating surface 12, and the depth of the second reserved cavity 162 is greater than or equal to the dimension of the second bending section 213 in the width direction of the plastic body 1.The first reserved cavity section 161 and the second reserved cavity section 162 have an overlapping portion at the connection point. After the insertion section 22 is inserted into the insertion cavity 11 and the first bent section 212 is inserted and supported in the limiting groove 152, the second bent section 213 is located in the overlapping portion of the first reserved cavity section 161 and the second reserved cavity section 162. The side of the second bent section 213 facing away from the first bent section 212 along the width direction of the plastic body 1 is flush with the bonding sheet, so that the second bent section 213 and the bonding surface 12 can be bonded to the circuit board together. At the same time, the reserved space 16 provides space for the welding end 21 and the circuit board to be welded, and the first reserved cavity section 161 facilitates the welding operation.

[0035] In this embodiment, the insertion segment 22 includes a base segment 221 connected to the mating end 23 and a retaining segment 222 connected between the base segment 221 and the welding end 21. The width of the retaining segment 222 is greater than the width of the base segment 221 and the welding end 21. The base segment 221 is used to insert into the second insertion cavity 114 and fit tightly with the second insertion cavity 114 to achieve the connection between the metal terminal 2 and the plastic body 1. The retaining segment 222 is used to pass through the first insertion cavity 113 and abut against the first insertion cavity 113 to limit the insertion depth of the metal terminal 2, thereby improving the connection between the metal terminal 2 and the complementary terminal and the connection between the metal terminal 2 and the plastic body 1. The base segment 221 extends from the mating end 23 with equal width along the insertion direction, and the second insertion cavity 114 is adapted to the base segment 221. A tight-fitting part 2211 protrudes from the outer periphery of the base segment 221 to abut against the inner wall of the second insertion cavity 114. In one embodiment, the tight-fitting portion 2211 is formed on the base segment 221 along its two sides, with at least two protrusions extending from the center towards the side away from the base segment 221. After the base segment 221 is inserted into the second insertion cavity 114, the tight-fitting portion 2211 abuts against the corresponding inner walls of the second insertion cavity 114 to achieve a tight fit and stable connection between the insertion segment 22 and the second insertion cavity 114. In another embodiment, the tight-fitting portion 2211 is formed on any two sides of the base segment 221.

[0036] In this embodiment, the two ends of the abutment section 222 extend backward along the width direction of the base section 221, forming outwardly protruding regions 2221 on both sides of the transverse direction of the base section 221. The two outwardly protruding regions 2221 form abutment surfaces 2222 on the side facing the docking end 23. Correspondingly, a limiting surface 1131 is formed on one side of the first insertion cavity 113 corresponding to the two abutment surfaces 2222. That is, the side of the first insertion cavity 113 close to the second insertion cavity 114 along the insertion direction is the limiting surface 1131. When the insertion section 22 is inserted into the insertion cavity 11, the base section 221 penetrates into the second insertion cavity 114 until the two abutment surfaces 2222 abut against the limiting surface 1131. After this, the insertion section 22 completes the connection between itself and the plastic body 1. The cooperation between the limiting surface 1131 and the abutment surface 2222 prevents the base section 221 and the docking end 23 from moving further into the slot 115. To reduce interference between the limiting surface 1131 and the abutment section 222, the two abutment surfaces 2222 are respectively formed with arc-shaped rounded corners 2223 between them and the two sides adjacent to the base section 221. Correspondingly, a clearance slope 1132 is formed at the position between the limiting surface 1131 and the side adjacent to the second insertion cavity 114 corresponding to the rounded corner 2223. The clearance slope 1132 is opened into the second insertion cavity 114 on the side facing the second insertion cavity 114, so that the side of the second insertion cavity 114 near the first insertion cavity 113 has a structure that gradually narrows towards the slot 115, thereby avoiding the rounded corner 2223 and reducing interference between the limiting surface 1131 and the base section 221. Preferably, recessed clearance spaces 2224 are provided between the two protruding regions 2221 along the insertion direction near the welding end 21 and the two sides of the welding end 21, so as to facilitate the insertion of the supporting section 222 into the first insertion cavity 113. Guide blocks 17 are protruding on both sides of each first opening 111 corresponding to the two protruding regions 2221, so that each guide block 17 is distributed at intervals along the length direction of the plastic body 1. On the two guide blocks 17 outside any first opening 111 facing each other, a guide slope 171 is formed that gradually narrows towards the first insertion cavity 113, so as to facilitate the quick insertion of the supporting section 222 into the metal terminal 2.

[0037] In this embodiment, the mating end 23 extends from the end of the base section 221 away from the supporting section 222 along the insertion direction and is the same width as the base section 221. The length of the mating end 23 is less than the size of the slot 115 in the insertion direction, so that after the base section 221 is inserted into the second insertion cavity 114, the mating end 23 is entirely located in the slot 115. The second through hole 112 is formed on the side of the slot 115 facing away from the support plate 151 along the insertion direction.

[0038] One embodiment of the electrical connector of this utility model operates as follows: During assembly, the mating end 23 of the metal terminal 2 is aligned with the first through-hole 111 along the insertion direction, and the second bent section 213 is aligned with the limiting groove 152. Then, the metal terminal 2 is moved along the insertion direction so that the mating end 23 passes through the first through-hole 111, the first insertion cavity 113, and the second insertion cavity 114 in sequence and is inserted into the slot 115. The base section 221 is inserted into the second insertion cavity 114, the tight fitting part 2211 abuts against the inner wall of the second insertion cavity 114, and the abutting section 222 is inserted into the first insertion cavity 113 until the abutting surface 2222 abuts against the limiting surface. At point 1131, the first bent section 212 is inserted into and supported in the limiting groove 152, while the second bent section 213 is located in the reserved space 16. After the circuit board contacts the mating surface 12, the solder feet 133 of the solder pull tab 13 are soldered to the circuit board, and the second bent section 213 is soldered to the circuit board from the reserved space 16 to complete the assembly of the electrical connector. In use, the second through hole 112 is moved towards the complementary electrical connector until the corresponding structure of the complementary electrical connector is inserted into the slot 115 and the mating end 23 is clamped by the complementary terminal to complete the connection between the electrical connector and the complementary electrical connector.

Claims

1. An electrical connector, comprising a plastic body having a mating cavity along a mating direction and metal terminals, wherein the metal terminals include a soldering end, a insertion section, and a mating end connected sequentially, characterized in that: The insertion section includes a base section and a support section connected between the base section and the welding end, and the support section is wider than the base section. The outer periphery of the base section is provided with a tight fitting portion for abutting against the insertion cavity. The insertion cavity includes a first insertion cavity in which the support section abuts to limit the insertion depth, a second insertion cavity in which the base section is tightly fitted, and a slot communicating with the second insertion cavity and in which the mating end is inserted.

2. The electrical connector as described in claim 1, characterized in that: The abutting section has two protruding areas exposed on both sides of the base section. The two protruding areas form abutting surfaces on one side facing the docking end, and a finite positioning surface is formed on the first insertion cavity corresponding to the two abutting surfaces.

3. The electrical connector as described in claim 2, characterized in that: The two abutment surfaces each form a rounded corner with the two sides of the base section.

4. The electrical connector as described in claim 3, characterized in that: The limiting surface has a relief slope that extends into the second insertion cavity to avoid the rounded corner at the position of the rounded corner.

5. The electrical connector as described in claim 3 or 4, characterized in that: The two convex regions are respectively provided with recessed clearance spaces between the side of the welding end and the two sides of the welding end along the insertion direction.

6. The electrical connector as described in claim 5, characterized in that: The first insertion cavity penetrates the plastic body along the insertion direction to form a first through-hole. Guide blocks are provided on both sides of the first through-hole corresponding to the two convex areas. On the opposite side of the two guide blocks, a guide slope is formed that gradually narrows toward the first insertion cavity.

7. The electrical connector as claimed in claim 1, characterized in that: The welding end includes a horizontally extending section distributed along the insertion direction away from the docking end, a first bent section formed by bending the horizontally extending section, and a second bent section formed by bending the first bent section; a support plate is formed on the plastic body at a position corresponding to the first bent section, extending along the insertion direction, and a limiting groove is provided on the support plate along the width direction of the plastic body for supporting and engaging the first bent section.

8. The electrical connector as claimed in claim 7, characterized in that: Support columns are provided on both sides of the plastic body along the length of the support plate in the insertion direction. The support plate is recessed between the two support columns to form a reserved space for the second bending section to pass through. The reserved space includes a first reserved cavity segment connected along the insertion direction to the side away from the plastic body and a second reserved cavity segment connected along the width direction of the plastic body to the side away from the insertion cavity. The plastic body has a bonding surface connected to the reserved space for bonding with the circuit board.

9. The electrical connector as claimed in claim 8, characterized in that: A soldering tab for soldering to the circuit board is inserted into the bonding surface and protrudes from the side opposite to the plastic body.

10. The electrical connector as claimed in claim 9, characterized in that: The slot extends through the plastic body in the insertion direction toward the side away from the support plate to form a second through hole.

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