Insulating shell and electric connector
By setting a tin resisting table on the insertion cavity wall of the insulating housing to prevent the solder from climbing, the problem of solder stacking or blocking is solved, and the conductive connection reliability of the electrical connector is improved.
Patent Information
- Application Number
- CN202421215395.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-30
AI Technical Summary
When existing electrical connectors use wave soldering to connect the jack terminals and the PCB board, solder may easily accumulate or be blocked in the jack terminals, affecting the reliability of the conductive connection.
A tin resistor is provided on the wall of the insertion cavity of the insulating housing, and the tin resistor extends to a position near where the pins of the socket terminals meet the sheet body to prevent the solder from climbing.
It effectively reduces the accumulation or blockage of solder in the plugging space, improves the sufficient plugging of the conductive pins and the jack terminals, and ensures the reliability of conductive connections.
Smart Images
Figure CN222620209U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of electric connectors, and in particular relates to an insulating shell and 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 printed circuit connector generally includes an insulating housing and a jack terminal. The insulating housing is provided with a plurality of insertion cavities with openings at both ends, and the jack terminals are correspondingly inserted into the insertion cavities. The jack terminals are generally Figure 1 The structure shown specifically 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 spring arm 6 extending from the upper end of the bending wall 5. A contact convex bump 13 is provided at the end of the contact spring arm 6 so as to be conductively connected to the conductive pin of the adapter connector. A barb structure 14 is provided on the bending wall 5, and the barb structure 14 can be inserted into the cavity wall of the insertion cavity after being installed in place so that the socket terminal is fixed in the insertion cavity. The sheet-like body 4 and the contact bending wall are integrally inserted into the insertion cavity of the insulating shell of the printed circuit connector, and enclose an insertion space 8 for inserting the conductive pin. A pin 7 extending out of the insertion cavity is extended from the lower end of the sheet-like body 4 so as to be soldered in the mounting hole of the PCB board by selective wave soldering. A retaining portion 17 is provided on the side of the sheet body 4 facing away from the pin 7, and a retaining groove for inserting the retaining portion 17 is provided on the insulating shell, so that the socket terminal can be reliably retained in the insertion cavity. 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. This will seriously affect the full degree of insertion between the conductive pin of the adapter connector and the printed circuit connector, and it is difficult to ensure the reliability of the conductive connection between the conductive pin and the socket terminal. At the same time, because the conductive pin is designed to be smaller in size in order to adapt to the socket terminal. The blocked insertion space will hinder the insertion of the conductive pin, and in severe cases, it will even cause damage to the conductive pin. Utility Model Content
[0004] The utility model aims to provide an insulating housing to solve the technical problem that the solder is easily accumulated or blocked inside the socket terminal when the socket terminal of the existing electrical connector is connected to the matching PCB board by wave soldering. The utility model aims to provide an electrical connector to solve the technical problem that the solder is easily accumulated or blocked inside the socket terminal when the socket terminal of the existing electrical connector is connected to the PCB board by wave soldering.
[0005] The utility model adopts the following technical solutions:
[0006] An insulating shell is provided with an insertion cavity with two ends opened for inserting a socket terminal, and a tin blocking platform extending to the vicinity of the connection between the pin of the socket terminal and the sheet body is provided on the cavity wall of the insertion cavity to prevent the solder from climbing onto the sheet body.
[0007] Furthermore, the groove wall of the retaining groove on the cavity wall of the insertion cavity located inside the socket terminal is provided with an extension portion, which extends to a position near the junction of the pin and the sheet-like body, and the extension portion constitutes the solder blocking platform.
[0008] Furthermore, the end of the solder blocking platform facing the pin is maintained at a side close to the sheet-like body where the pin and the sheet-like body are connected.
[0009] Beneficial effects: The utility model improves the existing insulating shell. The insulating shell described in the utility model is provided with an insertion cavity with openings at both ends for inserting the socket terminal, and a tin-blocking platform for blocking tin creeping extends from the cavity wall of the insertion cavity. The setting of the tin-blocking platform can prevent solder from creeping into the plug-in space in the socket terminal for electrical connection. Therefore, the above setting can reduce the accumulation of solder in the plug-in space or direct blockage of the plug-in space as much as possible, and also reduce the possibility of conductive pins being damaged due to solder blocking in the plug-in space during insertion, thereby effectively ensuring the full degree of insertion between the conductive pins of the adapter connector and the socket terminals of the printed circuit connector, thereby ensuring the reliability of the conductive connection between the conductive pins and the socket terminals.
[0010] An electrical connector comprises an insulating shell and a jack terminal; the insulating shell is provided with an insertion cavity with two ends open; the jack terminal is inserted in the insertion cavity; a tin-blocking platform extending to the vicinity of the junction between the pin of the jack terminal and the sheet-like body is provided on the cavity wall of the insertion cavity, so as to prevent the solder from climbing onto the sheet-like body.
[0011] Furthermore, the groove wall of the retaining groove on the cavity wall of the insertion cavity located inside the socket terminal is provided with an extension portion, which extends to a position near the junction of the pin and the sheet-like body, and the extension portion constitutes the solder blocking platform.
[0012] Furthermore, the end of the solder blocking platform facing the pin is maintained at a side close to the sheet-like body where the pin and the sheet-like body are connected.
[0013] Furthermore, at least part of the sheet-shaped body and the contact bending wall of the socket terminal has a nickel-exposed area.
[0014] 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.
[0015] Furthermore, a welding well is provided on the nickel exposed area of the sheet body corresponding to the position of the pin.
[0016] Furthermore, the welding well is a rectangular hole whose length direction is in the same direction as the width direction of the lead or whose width direction is in the same direction as the width direction of the lead.
[0017] 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 openings at both ends for inserting the socket terminal, and a tin-blocking platform for blocking solder creeping extends from the cavity wall of the insertion cavity. The setting of the tin-blocking platform can prevent solder from creeping into the plug-in space in the socket terminal for electrical connection. Therefore, the above setting can minimize the accumulation of solder in the plug-in space or directly block the plug-in space, and also reduce the possibility of conductive pins being damaged due to solder blocking in the plug-in space during insertion, thereby effectively ensuring the full degree of insertion between the conductive pins of the adapter connector and the socket terminals of the printed circuit connector, thereby ensuring the reliability of the conductive connection between the conductive pins and the socket terminals. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The figure is an out-of-axis view of an existing socket terminal;
[0019] Figure 2 This is an axial view of an embodiment of the electrical connector of the utility model;
[0020] Figure 3 for Figure 2 off-axis view in another direction;
[0021] Figure 4 for Figure 2 An off-axis view of the middle insulating housing;
[0022] Figure 5 for Figure 4 A top view of
[0023] Figure 6 for Figure 5 Section view along AA;
[0024] Figure 7 for Figure 5 Sectional view along BB;
[0025] Figure 8 for Figure 2 An axial outward view of a socket terminal adapted to an insulating housing;
[0026] 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 platform; 10. positioning notch; 11. stop surface; 12. nickel-exposed area; 13. contact bulge; 14. barb structure; 15. tin-penetrating platform; 16. welding well; 17. retaining portion; 18. retaining groove. DETAILED DESCRIPTION
[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0028] The principle of the electrical connector of the utility model is as follows:
[0029] An electrical connector, the structure of which can refer to Figure 2 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 3-7 As shown. It is provided with an insertion cavity 3 with two ends opened, and the socket terminal 1 is inserted in the insertion cavity 3. A tin blocking platform 9 for blocking solder creeping is extended on the cavity wall of the insertion cavity 3 to prevent solder from creeping into the insertion space 8 for electrical connection in the socket terminal 1.
[0030] Therefore, the above arrangement can reduce the accumulation of solder in the plug-in space 8 or direct blockage of the plug-in space 8 as much as possible, and also reduce the possibility of the conductive pin being damaged due to the solder blocking the plug-in space 8 during plug-in, thereby effectively ensuring the full plug-in degree between the conductive pin of the adapter connector and the socket terminal 1 of the printed circuit connector, and further ensuring the reliability of the conductive connection between the conductive pin and the socket terminal 1. In addition, solder is not easy to react with the material of the insulating body, so the provision of a tin-blocking platform 9 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 relatively easy to process, the consistency of the structure of the tin-blocking platform 9 can be better guaranteed, so that each insertion cavity 3 on the electrical connector can have a good tin-blocking ability.
[0031] Embodiments of the electrical connector of the utility model:
[0032] An electrical connector, the structure of which can refer to Figure 2 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 3-7As shown. A plug-in cavity 3 with two ends opened is provided on it so that the jack terminal 1 can be plugged into the insulating housing 2. The structure of the jack terminal 1 can be referred to Figure 8 The structure of the socket terminal 1 shown in the figure specifically includes a sheet-like body 4 and a pair of contact bending walls 5 arranged opposite to each other, wherein the contact bending walls 5 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 convex bump 13 is provided at the end of the contact elastic arm 6 so as to be electrically connected to the conductive pin of the adapter connector. The two contact bending walls 5 and the sheet-like body 4 together enclose a U-shaped plug-in space 8, wherein the contact bending walls 5 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. An electrical contact structure is provided on the bending wall 5 so as to be electrically connected to the conductive pin of the adapter connector. A sheet-like pin 7 is suspended on the side of the sheet-like body 4 facing away from the conductive pin insertion end so that the socket terminal 1 can be welded on the adapter PCB backboard. Since solder may creep into the insertion space 8 along the pins 7 during wave soldering, a solder blocking platform 9 for blocking solder creeping extends from the cavity wall of the insertion cavity 3 to prevent solder from creeping into the insertion space 8 for electrical connection in the socket terminal 1.
[0033] The aforementioned sheet body 4 is provided with a retaining portion 17 on the side facing away from the pin 7, and a retaining groove 18 for inserting the retaining portion 17 is provided on the cavity wall of the insertion cavity 3. On this basis, the key point of this embodiment is that the groove wall of the retaining groove 18 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 9. 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 9 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 18. The side of the socket terminal 1 facing away from the pin 7 is extended with a retaining portion 17 that can be inserted and matched with the retaining groove 18. The groove wall of the retaining groove 18 located on the inner side of the socket 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 9. When the socket terminal 1 is inserted into place in the insulating housing 2, the tin blocking platform 9 is inserted from the end of the socket terminal 1 facing away from the pin 7 to the vicinity of the junction of the pin 7 and the sheet body 4. In this way, while ensuring the tin blocking ability on the electrical connector, the retention ability of the insertion cavity 3 on the socket terminal 1 can be improved to prevent the socket terminal 1 from moving in the insertion cavity 3 and affecting the tin blocking effect. Of course, in other embodiments, the socket 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, and correspondingly, the tin blocking platform 9 can be a boss extending from the cavity wall of the insertion cavity 3. The boss extends from the cavity wall of the insertion cavity 3 opposite to the bending wall 5 and blocks the side of the bending wall 5 facing the pin 7. A gap is left between the tin blocking platform 9 and the main body of the insulating housing 2 so that the pin 7 can pass through.
[0034] The end of the tin-blocking platform 9 facing the pin 7 is kept on the side close to the sheet-like body 4 where the pin 7 and the sheet-like body 4 meet. In this way, the tin-blocking platform 9 can be prevented from interfering with the installation of the electrical connector and the adapter PCB board. On the basis of the aforementioned structure, a positioning notch 10 is formed between the two sides of the tin-blocking platform 9 along the width direction and the main body of the insulating shell 2. After the jack terminal 1 is inserted into place relative to the insertion cavity 3, the positioning notch 10 and the stop surface 11 on the jack terminal 1, that is, the corresponding end surface of the connecting part of the sheet-like 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 14 is also provided on one side of the side wall of the bending wall 5 facing the insertion cavity 3. The barb structure 14 can penetrate into the cavity wall of the insertion cavity 3 after the socket terminal 1 is inserted into the insertion cavity 3 to achieve the positioning of the socket terminal 1 in the insertion cavity 3 in the direction away from the insertion direction.
[0035] A tin penetration platform 15 may also be provided on the side of the insulating housing 2 facing away from the insertion direction of the jack terminal 1. The tin penetration platform 15 may allow a gap to exist 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 from the gap instead of climbing along the pins 7. In addition, the aforementioned gap also has a tin-blocking effect, thereby further enhancing the effect of blocking tin creeping on the electrical connector.
[0036] In addition, a nickel exposed area 12 can be polished on at least a portion of the sheet-like main body 4 and the contact bending wall 5. 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 a portion of the nickel layer on the sheet-like main body 4 and the contact bending wall 5 to form a nickel exposed area 12, so that the nickel oxide on the surface of the nickel layer can be used to delay the process of tin creeping. Nickel oxide has poor wettability with solder, so the fluidity of solder in the nickel exposed area 12 is poor and it is not easy to climb. The nickel exposed area 12 can be referred to Figure 8 The area surrounded by the square frame specifically includes the entire surface of the sheet body 4, the entire surface of the bending wall 5 contacting the bending wall 5, and the root of the contact spring arm 6 contacting the bending wall 5 connected to the bending wall 5. Such a configuration enables the nickel exposed area 12 to block the path of solder climbing as much as possible, thereby ensuring a more reliable tin blocking effect on the socket terminal 1.
[0037] In addition to the above structure, a solder well 16 can also be provided on the nickel exposed area 12 of the sheet body 4 corresponding to the position of the pin 7. After the jack terminal 1 is inserted into the insulating housing 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 16 is a rectangular hole correspondingly arranged on the sheet body 4 near the pin 7 and passing through the sheet body 4 along the thickness direction. The length direction of the rectangular hole is in the same direction as the width direction of the pin 7, or its width direction is in the same direction as the width direction of the pin 7. In this way, the sheet body 4 can still have a sufficient and uniform remaining portion after the welding well 16 is formed to ensure its own strength. Therefore, the above arrangement can ensure that the formation of the welding well 16 will not affect the strength of the sheet body 4.
[0038] Embodiments of the insulating housing of the utility model:
[0039] The embodiment of the insulating housing of the present invention is consistent with the scheme principle and the insulating housing in the embodiment of the electrical connector of the present invention, and will not be described in detail here.
[0040] 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 insulating housing, provided with an insertion cavity (3) with two ends opened for inserting a socket terminal (1), characterized in that: A tin blocking platform (9) extending to a position near the junction of the pin (7) of the socket terminal (1) and the sheet-like body (4) is provided on the cavity wall of the insertion cavity (3) to prevent solder from climbing onto the sheet-like body (4).
2. The insulating housing according to claim 1, characterized in that: The retaining groove (18) on the cavity wall of the insertion cavity (3) is provided with an extension portion on the groove wall located inside the socket terminal (1), and the extension portion extends to a position near the connection between the pin (7) and the sheet-like body (4), and the extension portion constitutes the tin-blocking platform (9).
3. The insulating housing according to claim 2, characterized in that: The end of the solder blocking platform (9) facing the pin (7) is maintained on a side close to the sheet-like body (4) where the pin (7) and the sheet-like body (4) meet.
4. An electrical connector, comprising an insulating housing (2) and a socket terminal (1); the insulating housing (2) is provided with an insertion cavity (3) with two ends open; the socket terminal (1) is inserted into the insertion cavity (3); characterized in that: A tin blocking platform (9) extending to a position near the junction of the pin (7) of the socket terminal (1) and the sheet-like body (4) is provided on the cavity wall of the insertion cavity (3) to prevent solder from climbing onto the sheet-like body (4).
5. The electrical connector according to claim 4, characterized in that: The retaining groove (18) on the cavity wall of the insertion cavity (3) is provided with an extension portion on the groove wall located inside the socket terminal (1), and the extension portion extends to a position near the connection between the pin (7) and the sheet-like body (4), and the extension portion constitutes the tin-blocking platform (9).
6. The electrical connector according to claim 5, characterized in that: The end of the solder blocking platform (9) facing the pin (7) is maintained on a side close to the sheet-like body (4) where the pin (7) and the sheet-like body (4) meet.
7. The electrical connector according to any one of claims 4 to 6, characterized in that: At least part of the sheet-shaped body (4) and the contact bending wall (5) of the socket terminal (1) has a nickel-exposed area (12).
8. The electrical connector according to claim 7, characterized in that: The nickel-exposed area (12) 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).
9. The electrical connector according to claim 7, characterized in that: A welding well (16) is provided on the nickel exposed area (12) of the sheet-shaped body (4) at a position corresponding to the pin (7).
10. The electrical connector according to claim 9, characterized in that: The welding well (16) is a rectangular hole whose length direction is in the same direction as the width direction of the pin (7) or whose width direction is in the same direction as the width direction of the pin (7).