Electric connector

Abstract

The utility model relates to the field of electric connectors, in particular to an electric connector. The electric connector solves the technical problem that when an existing electric connector adopts a wave soldering mode to connect a jack terminal and a PCB (printed circuit board), soldering tin easily enters an insertion space in the jack terminal through a gap between a tin blocking wall and a sheet-shaped main body, and the insertion of the jack terminal and an adaptive conductive pin is affected. The electric connector comprises an insulating shell and a jack terminal, the insulating shell is provided with an insertion cavity, and the jack terminal is inserted into the insertion cavity. The jack terminal comprises a sheet-shaped main body, the sheet-shaped main body is provided with a contact bending wall, and the sheet-shaped main body is also provided with a pin used for being connected with an adaptive PCB. The side, facing the pins, of at least one contact bending wall extends towards the other contact bending wall to form a tin blocking wall, and a tin blocking table is arranged at the position, corresponding to a gap between the tin blocking wall and the sheet-shaped body, of the insertion cavity. The soldering tin can be blocked outside as far as possible by the tin blocking wall, and the tin blocking table can prevent the soldering tin from flowing into the insertion space from the gap.

Description

Technical Field

[0001] The utility model belongs to the field of electric connectors, and in particular relates to an electric connector. Background Art

[0002] With the development of equipment integration, micro-precision and lightweight, the printed circuit connectors that match the equipment are also developing towards high density, low profile and integration, and the socket terminals on the printed circuit connectors are also progressing towards miniaturization at the same time.

[0003] An existing connector for printed circuits, such as the female full-floor communication connector disclosed in the Chinese utility model patent with authorization announcement number CN204391322U, generally includes an insulating shell and a jack terminal. The insulating shell is provided with a plurality of plug-in cavities with openings at both ends, and the jack terminals are correspondingly plugged into the plug-in cavities. The jack terminal specifically includes a sheet-like body and a pair of contact bending walls arranged opposite to each other, wherein the contact bending wall includes a bending wall extending from the left and right sides of the sheet-like body and bending in the same direction along the thickness direction of the sheet-like body, and a contact spring arm extending from the upper end of the bending wall. A contact portion is provided at the end of the contact spring arm to electrically connect with the conductive pin of the adapter connector. A barb structure is provided on the bending wall, and the barb structure can be inserted into the cavity wall of the plug-in cavity after being installed in place, so that the jack terminal is fixed in the plug-in cavity. The sheet-like body and the contact bending wall are integrally plugged into the plug-in cavity of the insulating shell of the printed circuit connector, and enclose an insertion space for inserting the conductive pin. The lower end of the sheet-like body extends with a pin extending out of the insertion cavity so that it can be soldered in the mounting hole of the PCB board by selective wave soldering. During soldering, the solder sprayed by the nozzle of the wave soldering equipment will flow into the insertion cavity from the opening at the corresponding end of the insertion cavity. Under the action of the tin creeping effect (or wick effect), the solder flowing into the insertion cavity is easy to climb into the aforementioned insertion space and accumulate and block in the insertion space. Or when the tin spraying height is too high, the above phenomenon will also occur. In order to cope with this problem, the above structure has a tin blocking wall extending toward the other bending wall at the lower side of one of the bending walls, so as to prevent the solder from rising through the wall surface of the tin blocking wall. However, due to the gap between the tin blocking wall and the sheet-like body, it cannot completely play the role of tin blocking, and some solder can still enter the insertion space through the gap. This will seriously affect the full degree of insertion between the conductive pins of the adapter connector and the printed circuit connector, and it is difficult to ensure the reliability of the conductive connection between the conductive pins and the socket terminals. At the same time, since the size of the conductive pin is designed to be small in order to fit the socket terminal, the blocked insertion space will hinder the insertion of the conductive pin, and in severe cases, even cause damage to the conductive pin. Utility Model Content

[0004] The utility model aims to provide an electrical connector to solve the technical problem that when the existing electrical connector adopts wave soldering to connect the socket terminal and the PCB board, the solder easily enters the plugging space in the socket terminal through the gap between the tin-blocking wall and the sheet body and affects the plugging of the socket terminal and the matching conductive pin.

[0005] The utility model adopts the following technical solutions:

[0006] An electrical connector comprises an insulating shell and a socket terminal, wherein the insulating shell is provided with an insertion cavity, and the socket terminal is inserted in the insertion cavity; the socket terminal comprises a sheet-like body, wherein the sheet-like body is provided with contact bending walls which are arranged in pairs and opposite to each other, and the sheet-like body is also provided with pins for connecting to an adaptable PCB board, and at least one contact bending wall is provided with a tin-blocking wall on one side facing the pin; a tin-blocking platform for blocking solder crawling in from the gap is provided on the cavity wall of the insertion cavity corresponding to the gap between the tin-blocking wall and the sheet-like body.

[0007] Furthermore, a retaining portion is provided on the side of the sheet-like body facing away from the pin, a retaining groove for inserting the retaining portion is provided on the cavity wall of the insertion cavity, and an extension portion extending to the vicinity of the junction between the pin and the sheet-like body is provided on the groove wall of the retaining groove located on the inner side of the socket terminal, and the extension portion constitutes the tin-blocking platform.

[0008] Furthermore, the end of the solder blocking platform facing the pin is located at a side close to the sheet-like body where the pin and the sheet-like body are connected.

[0009] Furthermore, the tin-blocking walls are arranged on the paired contact bending walls of the socket terminal.

[0010] Furthermore, the opposite end surfaces of the tin-blocking walls arranged on the paired contact bending walls are in contact with each other.

[0011] Furthermore, at least a portion of the sheet-shaped body and the contact bending wall has a nickel-exposed area.

[0012] Furthermore, the nickel-exposed area includes the entire surface of the sheet-like body, the entire surface of the bending wall that contacts the bending wall, and the root of the contact spring arm that contacts the bending wall and is connected to the bending wall.

[0013] Furthermore, a welding well is provided on the nickel exposed area of ​​the sheet body corresponding to the position of the pin.

[0014] Furthermore, a tin penetration platform is provided on the side of the insulating shell facing the pin.

[0015] Furthermore, the side surface of the tin-blocking wall facing the pin is flush with or lower than the surface of the tin-through platform.

[0016] Beneficial effects: The utility model improves the existing electrical connector. The electrical connector described in the utility model includes an insulating shell and a socket terminal. The insulating shell is provided with an insertion cavity with two ends opened, and the socket terminal is inserted in the insertion cavity. The socket terminal includes a sheet-like body, and the sheet-like body is provided with a pair of contact bending walls arranged oppositely and a pin for connecting to an adapting PCB board, and at least one contact bending wall is provided with a tin-blocking wall on the side facing the pin. Compared with the prior art, the focus of the utility model is that a tin-blocking platform for blocking solder crawling in from the gap is provided on the cavity wall of the insertion cavity corresponding to the gap between the tin-blocking wall and the sheet-like body. When the pin is soldered to the adapting PCB backplane by selective wave soldering, the solder climbing along the pin toward the sheet-like body can be blocked as much as possible by the tin-blocking wall to prevent the solder from entering and affecting the insertion space enclosed by the sheet-like body and the contact bending wall on the jack terminal for inserting the conductive pin. For the gap between the tin-blocking wall and the sheet-like body, the tin-blocking platform provided on the cavity wall of the insertion cavity corresponding to the gap between the tin-blocking wall and the sheet-like body can prevent the solder from flowing into the aforementioned insertion space from the gap, further improving the tin-blocking effect on the electrical connector. Therefore, the above structure can prevent the solder from creeping into the insertion space of the jack terminal as much as possible, and the tin-blocking effect is more reliable; thus, the solder is prevented from accumulating and clogging in the insertion space to ensure the full insertion degree of the conductive pins of the adapter connector and the electrical connector and the reliability of the conductive connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axial view of an embodiment of the electrical connector of the utility model;

[0018] Figure 2 for Figure 1 off-axis view in another direction;

[0019] Figure 3 for Figure 1 Schematic diagram of off-axis section along another direction;

[0020] Figure 4 for Figure 1 An off-axis view of the middle insulating housing;

[0021] Figure 5 for Figure 4 A top view of

[0022] Figure 6 for Figure 5 Section view along AA;

[0023] Figure 7 for Figure 5 Sectional view along BB;

[0024] Figure 8 for Figure 7Schematic diagram when a jack terminal is installed;

[0025] Fig. 9 for Figure 1 The off-axis schematic diagram of the middle jack terminal;

[0026] Fig.10 for Fig. 9 Bottom view of

[0027] The names of the components corresponding to the corresponding reference numerals in the figure are: 1. jack terminal; 2. insulating shell; 3. insertion cavity; 4. sheet body; 5. bending wall; 6. contact spring arm; 7. pin; 8. insertion space; 9. tin-blocking wall; 10. tin-blocking platform; 11. positioning notch; 12. stop surface; 13. nickel-exposed area; 14. contact portion; 15. barb structure; 16. tin-penetrating platform; 17. retaining groove; 18. retaining portion. DETAILED DESCRIPTION

[0028] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0029] The principle of the electrical connector of the utility model is as follows:

[0030] An electrical connector, the structure of which can refer to Figure 1-3 and Figure 8 As shown, it includes an insulating housing 2 and a socket terminal 1. The structure of the insulating housing 2 can be referred to Figure 4-7 As shown, an insertion cavity 3 with two ends opened is provided on it so that the socket terminal 1 can be inserted and fixed on the insulating housing 2. The structure of the socket terminal 1 can be referred to Fig. 9 , Fig.10 As shown, it includes a sheet-like body 4 and a pair of contact bending walls arranged opposite to each other, wherein the contact bending walls include bending walls 5 extending from the left and right sides of the sheet-like body 4 and bending in the same direction along the thickness direction of the sheet-like body 4, and a contact elastic arm 6 extending from the upper end of the bending wall 5. A contact portion 14 is provided at the end of the contact elastic arm 6 to electrically connect with the conductive pin of the adapter connector. A sheet-like pin 7 is cantilevered on the side of the sheet-like body 4 facing away from the insertion end of the conductive pin, so that the socket terminal 1 can be welded on the adapter PCB backplane. A tin-blocking wall 9 is provided on the side of at least one contact bending wall facing the pin 7, so as to prevent part of the solder from being blocked out by the tin-blocking wall 9.

[0031] Compared with the prior art, the key to the electrical connector of the utility model is that a tin-blocking platform 10 for blocking solder from creeping in from the gap is provided at the gap between the tin-blocking wall 9 and the sheet-like body 4 on the cavity wall of the insertion cavity 3. When the pin 7 is soldered to the matching PCB backplane by selective wave soldering, the solder climbing along the pin 7 toward the sheet-like body 4 can be blocked as much as possible by the tin-blocking wall 9 to prevent the solder from entering and affecting the insertion space 8 for the conductive pin to be inserted, which is surrounded by the sheet-like body 4 and the contact bending wall on the socket terminal 1; the tin-blocking platform 10 provided at the gap between the tin-blocking wall 9 and the sheet-like body 4 on the insertion cavity 3 can prevent the solder from flowing into the aforementioned insertion space 8 from the gap, further improving the tin-blocking effect on the electrical connector. Therefore, the above structure can prevent solder from creeping into the insertion space 8 of the socket terminal 1 as much as possible, and the tin blocking effect is more reliable; it can also effectively prevent solder from accumulating and clogging in the insertion space to ensure the full insertion degree of the conductive pins of the adapter connector and the electrical connector and the reliability of the conductive connection.

[0032] In addition, solder does not easily react with the material of the insulating body, so the tin-blocking platform 10 provided on the insulating body can also greatly improve the tin-blocking ability of the electrical connector. At the same time, since the insulating body is easy to process, the structural consistency of the tin-blocking platform 10 can be better ensured, so that each insertion cavity 3 on the electrical connector can have a good tin-blocking ability.

[0033] Embodiment 1 of the electrical connector of the utility model:

[0034] An electrical connector, the structure of which can refer to Figure 1-3 and Figure 8 As shown, it includes an insulating housing 2 and a socket terminal 1. The structure of the insulating housing 2 can be referred to Figure 4-7 As shown, an insertion cavity 3 with two ends opened is provided on it so that the socket terminal 1 can be inserted and fixed on the insulating housing 2. The structure of the socket terminal 1 can be referred to Fig. 9 , Fig.10 As shown, it includes a sheet-like body 4 and a pair of contact bending walls arranged opposite to each other, wherein the contact bending walls include bending walls 5 extending from the left and right sides of the sheet-like body 4 and bending in the same direction along the thickness direction of the sheet-like body 4, and a contact elastic arm 6 extending from the upper end of the bending wall 5. A contact portion 14 is provided at the end of the contact elastic arm 6 to be conductively connected to the conductive pin of the adapter connector. The two contact bending walls and the sheet-like body 4 together enclose a U-shaped plug-in space 8, wherein the contact bending walls extending in the same direction constitute the opposite side walls of the U-shaped plug-in space 8, and the sheet-like body 4 constitutes the side wall connected between the opposite side walls. A contact portion 14 is provided on the bending wall 5 to be conductively contacted with the conductive pin of the adapter connector.

[0035] A sheet-shaped pin 7 is cantilevered on the side of the sheet-shaped body 4 facing away from the conductive pin insertion end so that the socket terminal 1 can be soldered on the matching PCB backplane. Since solder may creep into the insertion space 8 along the pin 7 during wave soldering, a tin-blocking wall 9 is extended from the side of at least one contact bending wall facing the pin 7 to the other contact bending wall. Specifically, a tin-blocking wall 9 is extended from the side of the bending wall 5 facing the pin 7 to the other bending wall 5. A tin-blocking platform 10 is provided on the insertion cavity 3 at the gap between the tin-blocking wall 9 and the sheet-shaped body 4 to block the solder creeping in from the gap, so as to prevent the solder from climbing.

[0036] The key point of this embodiment is that a retaining portion 18 is provided on the side of the sheet body 4 facing away from the pin 7, and a retaining groove 17 for inserting the retaining portion 18 is provided on the cavity wall of the insertion cavity 3. The groove wall of the retaining groove 17 located on the inner side of the socket terminal 1 is provided with an extension portion protruding to the vicinity of the connection between the pin 7 and the sheet body 4, and the extension portion constitutes the tin blocking platform 10. In this embodiment, the socket terminal 1 is inserted into the insertion cavity 3 from the side of the insulating housing 2 toward the adapted PCB board, and then the pin 7 exposed outside the insertion cavity 3 is inserted into the solder hole of the adapted PCB board and soldered by selective wave soldering. Correspondingly, the tin blocking platform 10 is a thick sheet-like structure extending from the side wall of the insertion cavity 3 toward the pin 7, and a gap is left between the thick sheet-like structure and the main body of the insulating housing 2 to form the retaining groove 17. A retaining portion 18 that can be inserted and matched with the retaining groove 17 is extended on the side of the socket terminal 1 facing away from the pin 7. The groove wall of the retaining groove 17 located on the inner side of the jack terminal 1 has an extension protruding to the vicinity of the junction of the pin 7 and the sheet body 4. The extension is the aforementioned tin blocking platform 10. When the jack terminal 1 is inserted into place in the insulating housing 2, the tin blocking platform 10 is inserted from the end of the jack terminal 1 facing away from the pin 7 to the position of blocking the gap between the tin blocking wall 9 and the sheet body 4. In this way, the sheet body 4 can be used to support the tin blocking wall 9 from the side facing away from the pin 7, so that the tin blocking wall 9 can be reliably maintained in a position to block the solder from climbing. In addition, this can also improve the holding capacity of the insertion cavity 3 for the jack terminal 1, so as to avoid the jack terminal 1 from moving in the insertion cavity 3 and affecting the tin blocking effect. Of course, in other embodiments, the jack terminal 1 can also be inserted into the insertion cavity 3 from the side of the insulating housing 2 facing away from the adapted PCB board. Correspondingly, the tin blocking platform 10 can be a protrusion on the insertion cavity 3 that blocks the gap between the tin blocking wall 9 and the sheet body 4 from the side of the tin blocking wall 9 facing the pin 7. Specifically, the tin-blocking platform 10 extends out from the cavity wall of the insertion hole opposite to the bending wall 5, and blocks the side of the tin-blocking wall 9 facing the pin 7. A gap is left between the tin-blocking platform 10 and the main body of the insulating housing 2 so that the pin 7 can pass through. The end of the tin-blocking platform 10 facing the pin 7 is kept on the side close to the sheet body 4 where the pin 7 and the sheet body 4 meet. In this way, the tin-blocking platform 10 can be prevented from interfering with the tin-blocking wall 9, thereby preventing the tin-blocking wall 9 from protruding outward and affecting the installation of the electrical connector and the matching PCB board.

[0037] On the basis of the above structure, a positioning notch 11 is formed between the two sides of the tin-blocking platform 10 and the main body of the insulating shell 2 along the width direction. After the jack terminal 1 is inserted into place relative to the insertion cavity 3, the positioning notch 11 and the stop surface 12 on the jack terminal 1, that is, the corresponding end surface of the connection part of the sheet body 4 and the bending wall 5, are stopped and matched to realize the positioning of the jack terminal 1 in its insertion direction. Such a setting can minimize the movement of the jack terminal 1 in the insertion cavity 3, thereby avoiding the influence of the movement of the jack terminal 1 on the tin-blocking effect. A barb structure 15 is also provided on one side of the side wall of the bending wall 5 facing the insertion cavity 3. The barb structure 15 can penetrate into the cavity wall of the insertion cavity 3 after the jack terminal 1 is inserted into place in the insertion cavity 3, so as to realize the positioning of the jack terminal 1 in the insertion cavity 3 in the direction opposite to its insertion direction.

[0038] The tin-blocking walls 9 are arranged on the paired contact bending walls of the jack terminal 1, that is, the tin-blocking walls 9 are also arranged in pairs, and the extension directions of the tin-blocking walls 9 are opposite to each other. Compared with the technical solution of extending a complete bending wall 5 from a single-sided contact bending wall, such an arrangement can shorten the extension length of the bending wall 5, thereby making the bending wall 5 have sufficient rigidity and strength to remain on the path of blocking the solder from climbing. Of course, the tin-blocking wall 9 can also be arranged on only one side, and the tin-blocking wall 9 extends from the contact bending wall where it is located to the position where it contacts the other contact bending wall.

[0039] On the basis of the aforementioned structure, the relative end faces of the tin-blocking walls 9 arranged on the paired contact bending walls can be made to fit together. On the one hand, such a setting can eliminate the gap between the relative end faces of the tin-blocking walls 9, thereby ensuring the tin-blocking effect of the tin-blocking walls 9; on the other hand, making the relative end faces of the tin-blocking walls 9 fit together can also limit the deformation of the bending wall 5. When the contact bending wall has a tendency to deform toward the inside of the socket terminal 1, the relative end faces of the tin-blocking walls 9 abut against each other to prevent this deformation tendency. Of course, while ensuring the tin-blocking effect of the tin-blocking walls 9, the tin-blocking walls 9 located on different contact bending walls can also partially overlap, or leave a small gap between the relative end faces.

[0040] Embodiment 2 of the electrical connector of the utility model:

[0041] Compared with Example 1, the key point of this embodiment is that at least part of the sheet-like main body 4 and the contact bending wall have a nickel exposed area 13. The currently existing jack terminal 1 usually includes a nickel layer covering the main body of the jack terminal 1 and a gold layer covering the nickel layer. However, the gold layer will react with the solder, thereby accelerating the process of tin creeping. In order to avoid this problem, the jack terminal 1 can be polished to expose at least part of the sheet-like main body 4 and the nickel layer on the contact bending wall to form a nickel exposed area 13, so as to utilize the nickel oxide on the surface of the nickel layer to slow down the process of tin creeping. Nickel oxide has poor wettability with solder, so the fluidity of solder in the nickel exposed area 13 is poor and it is not easy to climb. The nickel exposed area 13 can be referred to Fig. 9 The area enclosed by the square frame specifically includes the entire surface of the sheet body 4, the entire surface of the bent wall 5 contacting the bent wall, and the root of the contact spring arm 6 contacting the bent wall connected to the bent wall 5. Such a configuration enables the nickel exposed area 13 to block the path of solder climbing as much as possible, thereby ensuring a more reliable tin blocking effect on the socket terminal 1.

[0042] In addition, a solder well can be provided on the nickel exposed area 13 of the sheet body 4 at the position corresponding to the pin 7. After the jack terminal 1 is inserted into the insulating shell 2, there is a certain assembly gap between the sheet body 4 and the tin blocking platform 9. During wave soldering, solder may flow into the assembly gap. The above arrangement can make it difficult for the solder slowly climbing on the nickel layer to continue to climb over the solder well 16, thereby preventing the solder from flowing into the gap between the sheet body 4 and the tin blocking platform 9, and further enhancing the blocking effect of the jack terminal 1 on tin climbing. In the present embodiment, the sheet body 4 is specifically a rectangular sheet structure, the pin 7 is arranged at the center of the lower edge of the sheet body 4, and the solder well is a rectangular hole correspondingly arranged at the center of the sheet body 4 and passing through the sheet body 4 along the thickness direction.

[0043] A tin-through platform 16 can also be provided on the side of the insulating housing 2 facing the pin 7. The tin-through platform 16 can create a gap between the plane where the insertion cavity 3 on the insulating housing 2 is located and the PCB board, so that excess solder can flow out of the gap instead of climbing along the pin 7. In addition, the aforementioned gap also has the effect of blocking tin, and thus can further enhance the blocking effect of creeping tin on the electrical connector. On this basis, when the jack terminal 1 is inserted into place in the insulating housing 2, the side of the tin-blocking wall 9 facing the pin 7 is flush with or shorter than the table surface of the tin-through platform 16. In other words, the side wall of the tin-blocking wall 9 facing the PCB board is just flush with or concave with the table surface of the tin-through platform 16 in contact with the PCB board. Such a setting can make the tin-through platform 16, the tin-blocking wall 9, and the tin-blocking platform 10 play the role of tin-blocking successively, layer by layer, to avoid the tin-through platform 16 and the tin-blocking wall 9 interfering with each other's positions and thus affecting their respective tin-blocking effects.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrical connector, comprising an insulating housing (2) and a socket terminal (1), wherein the insulating housing (2) is provided with an insertion cavity (3), and the socket terminal (1) is inserted into the insertion cavity (3); the socket terminal (1) comprises a sheet-like body (4), wherein the sheet-like body (4) is provided with a pair of contact bending walls (5) arranged opposite to each other, and the sheet-like body (4) is also provided with pins (7) for connecting to an adaptable PCB board, characterized in that: A tin-blocking wall (9) is provided on the side of at least one contact bending wall (5) facing the pin (7), and a tin-blocking platform (10) for blocking solder creeping into the gap is provided on the cavity wall of the insertion cavity (3) corresponding to the gap between the tin-blocking wall (9) and the sheet-shaped body (4).

2. The electrical connector according to claim 1, characterized in that: A retaining portion (18) is provided on a side of the sheet-like body (4) facing away from the pin (7), a retaining groove (17) for inserting the retaining portion (18) is provided on a cavity wall of the insertion cavity (3), and an extension portion extending to the vicinity of a junction between the pin (7) and the sheet-like body (4) is provided on a groove wall of the retaining groove (17) located inside the socket terminal (1), the extension portion constituting the solder blocking platform (10).

3. The electrical connector according to claim 2, characterized in that: The end of the solder blocking platform (10) facing the pin (7) is located on a side close to the sheet-like body (4) where the pin (7) and the sheet-like body (4) meet.

4. The electrical connector according to any one of claims 1 to 3, characterized in that: The tin-blocking walls (9) are both provided on the paired contact bending walls (5) of the socket terminal (1).

5. The electrical connector according to claim 4, characterized in that: The opposite end surfaces of the tin-blocking walls (9) arranged on the paired contact bending walls (5) are in contact with each other.

6. The electrical connector according to any one of claims 1 to 3, characterized in that: At least part of the sheet-shaped body (4) and the contact bending wall (5) has a nickel-exposed area (13).

7. The electrical connector according to claim 6, characterized in that: The nickel-exposed area (13) comprises the entire surface of the sheet-like body (4), the entire surface of the bending wall (5) that contacts the bending wall (5), and the root of the contact spring arm (6) that contacts the bending wall (5) and is connected to the bending wall (5).

8. The electrical connector according to claim 6, characterized in that: A welding well is provided on the nickel exposed area (13) of the sheet-shaped body (4) at a position corresponding to the pin (7).

9. The electrical connector according to any one of claims 1 to 3, characterized in that: A tin penetration platform (16) is provided on the side of the insulating housing (2) facing the pin (7).

10. The electrical connector according to claim 9, characterized in that: The side surface of the tin-blocking wall (9) facing the lead (7) is flush with or lower than the surface of the tin-through platform (16).

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