Board-to-wire connector

Abstract

The utility model relates to a board-to-wire connector, which comprises a board end connector and a wire end connector which are mutually matched and plugged, the board end connector is provided with a board end insulating seat and a plurality of board end terminals, and the board end terminals are embedded into the board end insulating seat and are provided with blade-shaped contact parts in a side standing posture. The first fixing part of the plate end terminal is provided with two laterally-vertical elastic sheets which are in bilateral symmetry, and a welding pin is led out from each laterally-vertical elastic sheet; the wire end connector is provided with a wire end insulating seat and a plurality of wire end terminals, the wire end insulating seat and the plate end insulating seat are combined in a butt joint mode, a clamping cavity is formed in a plug-in mounting contact part of each wire end terminal, and the blade-shaped contact part is inserted into the clamping cavity and electrically connected with the plug-in mounting contact part. According to the utility model, a large contact area is obtained, the large current requirement is met, the butt joint pulling and plugging force of the male and female terminals can be effectively reduced, and the plugging implementation is more convenient; the board end connector and the wire end connector are in double plug-in connection, connection is stable, firm contact between terminals can be maintained, and current stability is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a board-to-wire connector that meets the needs of large currents. Background Art

[0002] Electrical connectors are widely used in electronics, electrical appliances, and instruments to transmit current or signals. Board-to-wire connectors that meet high current requirements can withstand high current loads and are usually used to connect high-power devices such as power supplies, motors, and transformers. These terminals usually have a larger conductive cross-sectional area to allow for lower contact resistance and voltage drop under high current and high power loads, and usually have more reliable mechanical connections and insulating materials to ensure the stability and safety of the connection.

[0003] The male terminals of traditional electrical connectors with high current are generally cylindrical, while the female terminals are generally round tubes, so that the male terminals can be inserted into the female terminals for electrical connection. However, this structural form has a large positive force, resulting in a large plugging and unplugging force. The insertion force is difficult to control during use and is likely to exceed the specification requirements, affecting the efficiency and experience of use. Summary of the invention

[0004] The purpose of the utility model is to provide a board-to-wire connector, which can well solve the above technical problems, meet the needs of large currents, and provide better user experience.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A board-to-wire connector includes a board-end connector and a wire-end connector that are plugged into each other. The board-end connector has a board-end insulating seat and a plurality of board-end terminals. The board-end insulating seat is provided with a plug-in slot at the front end and a plurality of first terminal holes opened from the rear end and extending to the plug-in slot; the board-end terminal is implanted and installed corresponding to the first terminal hole, and the board-end terminal has a blade-shaped contact portion protruding into the plug-in slot and in a side-standing posture, a first fixing portion positioned in the first terminal hole, and a welding foot led out from the first fixing portion; the first fixing portion has two side-standing spring sheets bent from the rear end of the blade-shaped contact portion to form left-right symmetry, and each side-standing spring sheet All lead out welding pins; the line end connector has a line end insulating seat and several line end terminals, the line end insulating seat is provided with a plug-in portion and several second terminal holes, the plug-in portion is used for docking and combining with the plug-in slot, the second terminal holes are used for assembling the line end terminals, and one end of the second terminal hole extends to the end of the plug-in portion and forms a plug-in hole, the shape and size of the plug-in hole match the blade-shaped contact portion; the line end terminal has an insertion contact portion, a second fixing portion and a wiring portion, the insertion contact portion extends into the insertion portion and constructs a clamping cavity on the insertion contact portion, the blade-shaped contact portion is inserted into the clamping cavity through the plug-in hole and is electrically connected to the insertion contact portion.

[0007] The above scheme is further that the board-end connector and the line-end connector are horizontal, the board-end insulating seat and the line-end insulating seat are flat, the first terminal hole and the second terminal hole are both linear step holes, and the first terminal holes are evenly arranged in a row along the flat direction of the board-end insulating seat, and the second terminal holes are evenly arranged in a row along the flat direction of the line-end insulating seat; the board-end terminal and the line-end terminal are both stamped out of copper material; the thickness of the blade-shaped contact portion of the board-end terminal is twice that of the side-standing spring sheet; the plug-in contact portion of the line-end terminal is a left-right symmetrical elastic curved arm structure obtained by stamping, and the clamping cavity is formed between the two elastic curved arms, and the left and right elastic curved arms clamp the blade-shaped contact portion.

[0008] The above scheme is further that the corresponding parts of the left and right sides of the front end of the plate-end insulating seat respectively extend forward to form clamping arms, a plug-in groove is formed between the two clamping arms, and an introduction slide groove is provided on the inner side of the clamping arm, and the introduction slide groove extends along the length direction of the clamping arm; a locking spring arm is provided on the corresponding outer side of the plug-in part of the wire-end insulating seat, and the locking spring arm is inserted and assembled into the corresponding introduction slide groove and forms an anti-retraction clamping connection with the clamping arm.

[0009] The above scheme further has the feature that the wire end insulating seat is provided with an embedding groove connected to the second terminal hole, the embedding groove is used for insert assembly, and the wire end terminal is restricted by the insert to stabilize the wire end terminal in the second terminal hole.

[0010] The above scheme is further that the embedding groove is a long strip-shaped groove that is concave downward from the upper side surface of the wire end insulating seat, and the embedding groove is in the shape of intercepting the second terminal hole, and connecting holes are arranged on the inner bottom of the embedding groove corresponding to different second terminal holes; the insert includes a long strip main body and hanging feet extending from the long strip main body, the long strip main body is embedded in the embedding groove, the hanging feet are inserted into the second terminal hole through the connecting holes, and the hanging feet abut against the rear side end of the second fixing part in the second terminal hole, so that the wire end terminal cannot retreat after being implanted forward into the second terminal hole.

[0011] The utility model realizes double plug-in connection of the board-end connector and the line-end connector by mutual plugging of the board-end insulating seat and the line-end insulating seat, as well as the board-end terminal and the line-end terminal. The connection is stable and can maintain firm contact between the terminals and maintain stable current. At the same time, the board-end terminal is plugged into the line-end terminal through the blade-shaped contact portion and has an insertion contact portion, and a clamping cavity is constructed on the insertion contact portion of the line-end terminal. Furthermore, the insertion contact portion of the line-end terminal is obtained by stamping and formed into a left-right symmetrical elastic curved arm structure, and the clamping cavity is formed between the two elastic curved arms. The left and right elastic curved arms clamp the blade-shaped contact portion, which not only obtains a larger contact area to meet the high current requirements, but also effectively reduces the insertion and removal force of the male and female terminals, making the insertion and connection easier.

[0012] Furthermore, the first fixing part of the board end terminal has two side spring sheets bent from the rear end of the blade-shaped contact part to form left-right symmetry. Each side spring sheet leads to a welding foot to increase the stability of the upper plate welding. The two side spring sheets can also increase current transmission, and the two side spring sheets are conveniently embedded in the first terminal hole to obtain a tight fit, and the line end terminal is implanted forward into the second terminal hole and restricted by a movable support top method, which not only obtains a stable assembly structure, but also facilitates assembly and maintenance, and is suitable for automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a schematic structural diagram of one embodiment of the utility model;

[0014] Attached Figure 2 for Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0015] Attached Figure 3 for Figure 1 A schematic diagram of the board-end connector structure of an embodiment;

[0016] Attached Figure 4 for Figure 1 A schematic diagram of the structure of the board-end connector of the embodiment;

[0017] Attached Figure 5 for Figure 1 A cross-sectional view of the internal structure of the board-end connector of the embodiment;

[0018] Attached Figure 6 for Figure 1 A schematic diagram of the structure of the line end connector of the embodiment;

[0019] Attached Figure 7 for Figure 1 A schematic diagram of the structure of the wire end connector of the embodiment;

[0020] Attached Figure 8 , 9 for Figure 1 A cross-sectional view of the internal structure of the wire end connector of an embodiment. DETAILED DESCRIPTION

[0021] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0022] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] See also Figure 1 , 2 , 3, 4, 5, 6, 7, 8, and 9 are schematic diagrams of the structure of a preferred embodiment of the utility model. The utility model is related to a board-to-wire connector, including a board-end connector 1 and a wire-end connector 2 that are plugged in with each other. Preferably, the board-end connector 1 and the wire-end connector 2 are horizontal, and the board-end connector 1 and the wire-end connector 2 are plugged in with each other to achieve a quick conductive connection between the circuit board and the wire.

[0024] The board-end connector 1 has a board-end insulating seat 11 and several board-end terminals 12. The board-end insulating seat 11 is flat and is positioned on the PAB board by corresponding fixing feet. The board-end insulating seat 11 is provided with a plug-in slot 111 at the front end and several first terminal holes 112 opened from the rear end and extending to the plug-in slot 111. Preferably, the first terminal holes 112 are linear step holes, and the first terminal holes 112 are evenly arranged in a row along the flat direction of the board-end insulating seat 11, so that several first terminal holes 112 are assembled and arranged in order. The board-end terminal 12 is implanted and installed corresponding to the first terminal hole 112, and the step of the first terminal hole 112 is used to position and limit it. In this embodiment, the product's external dimensions are controlled within 50 mm, that is, the flat direction dimension of the board-end insulating seat 11 is within 50 mm. At this time, the spacing between the board-end terminals 12 is designed to be 6.50 mm, which meets the requirements of large current transmission and ensures safety and effectiveness in use. In this embodiment, the board terminal 12 has a blade-shaped contact portion 121 protruding into the plug-in slot 111 and in a side-standing posture, a first fixing portion 122 positioned in the first terminal hole 112, and a welding foot 123 led out from the first fixing portion 122. Further, the first fixing portion 122 has two side-standing spring sheets 1221 bent from the rear end of the blade-shaped contact portion 121 and formed to be symmetrical on the left and right, and each side-standing spring sheet 1221 leads out a welding foot 123. During assembly, each side-standing spring sheet 1221 is elastically opened and tightly matched with the inner side wall of the first terminal hole 112, which facilitates assembly and stabilizes assembly. In this embodiment, a corresponding avoidance position 1121 is reserved on the inner side wall of the first terminal hole 112. The avoidance position 1121 is used to realize that the insertion tool presses the two side-standing spring sheets 1221 so as to disassemble the board terminal 12, which has maintenance and replacement characteristics.

[0025] The wire end connector 2 has a wire end insulating seat 21 and several wire end terminals 22. The wire end insulating seat 21 is flat and is provided with a plug-in portion 211 and several second terminal holes 212. Preferably, the second terminal holes 212 are linear step holes, and the second terminal holes 212 are evenly arranged in a row along the flat direction of the wire end insulating seat 21. The position and number of the second terminal holes 212 correspond to the first terminal holes 112. The plug-in portion 211 is used for docking and combining with the plug-in slot 111, and the second terminal hole 212 is used for assembling the line terminal 22, and one end of the second terminal hole 212 extends to the end of the plug-in portion 211 and forms a plug-in hole 213, and the shape and size of the plug-in hole 213 match the blade-shaped contact portion 121; the line terminal 22 has a plug-in contact portion 221, a second fixing portion 222 and a wiring portion 223, and the wiring portion 223 in the figure is connected to the wire 3 by riveting, and the outer diameter of the wire 3 is preferably less than 5.50mm, which meets the requirements of reducing the product's external dimensions. The plug-in contact portion 221 extends into the plug-in portion 211 and constructs a clamping cavity 2211 on the plug-in contact portion 221, and the blade-shaped contact portion 121 is inserted into the clamping cavity 2211 through the plug-in hole 213 and is electrically connected to the plug-in contact portion 221.

[0026] Furthermore, in this embodiment, the board terminal 12 and the line terminal 22 are both formed by stamping of copper materials to meet the requirements of large current. The thickness of the blade-shaped contact portion 121 of the board terminal 12 is twice that of the side spring 1221. This structure can improve the strength of the blade-shaped contact portion 121, and at the same time increase the current transmission area of ​​the first fixed portion 122 to reduce resistance. The plug-in contact portion 221 of the line terminal 22 is obtained by stamping and formed into a left-right symmetrical elastic curved arm 2212. The clamping cavity 2211 is formed between the two elastic curved arms 2212, and the left and right elastic curved arms 2212 clamp the blade-shaped contact portion 121. As shown in the figure, the left and right elastic curved arms 2212 are divided into two or more arc-shaped grid plates respectively, which increases the contact area, reduces the contact resistance between the board end terminal 12 and the line end terminal 22, and obtains a lower voltage drop; at the same time, the design of the left and right elastic curved arms 2212 helps to reduce stress, reduce the positive force, help reduce the plug-in and pull-out force, and improve the user experience.

[0027] In this embodiment, the corresponding parts of the left and right sides of the front end of the plate-end insulating seat 11 extend forward to form clamping arms 113, and a plug-in slot 111 is formed between the two clamping arms 113. The structure is simple and easy to manufacture. An introduction slot 1131 is provided on the inner side of the clamping arm 113, and the introduction slot 1131 extends along the length direction of the clamping arm 113; a locking spring arm 214 is provided on the corresponding outer side of the plug-in portion 211 of the wire-end insulating seat 21, and the locking spring arm 214 is inserted and assembled corresponding to the introduction slot 1131 and forms an anti-retraction clamping connection with the clamping arm 113. In the figure, the locking spring arm 214 is arranged symmetrically in the direction of the plug-in, and the anti-retraction hook 2141 is arranged on the locking spring arm 214, and the corresponding anti-retraction hanging platform 1132 is arranged on the inner side of the clamp arm 113, the plug-in part 211 is inserted into the plug-in slot 111, and the locking spring arm 214 is inserted into the corresponding guide slot 1131, and the anti-retraction hook 2141 is automatically clamped into the anti-retraction hanging platform 1132 through the elasticity of the locking spring arm 214, so as to achieve the anti-retraction clamping connection, and prevent the plug-in part 211 from withdrawing from the plug-in slot 111, thereby increasing the connection performance and achieving the automatic locking effect. When unlocking, the locking spring arm 214 is pressed to make the anti-retraction hook 2141 withdraw from the anti-retraction hanging platform 1132, and the plug-in part 211 can be pulled out.

[0028] In this embodiment, the wire end insulating seat 21 is provided with an embedding groove 215 connected to the second terminal hole 212 . The embedding groove 215 is used for assembling the insert 23 , and the insert 23 restricts the wire end terminal 22 so that the wire end terminal 22 is stabilized in the second terminal hole 212 . Furthermore, the embedding groove 215 is a long strip-shaped recessed groove that is concave downward from the upper side surface of the wire end insulating seat 21, and the embedding groove 215 is in the shape of intercepting the second terminal hole 212, and connecting holes 2151 are set on the inner bottom of the embedding groove 215 corresponding to different second terminal holes 212; the insert 23 includes a long strip body 231 and a hanging foot 232 extending from the long strip body 231, the long strip body 231 is embedded in the embedding groove 215, and the hanging foot 232 is inserted into the second terminal hole 212 through the connecting hole 2151, and the hanging foot 232 abuts against the rear side end of the second fixing portion 222 in the second terminal hole 212, so that the wire end terminal 22 cannot retreat after being implanted forward into the second terminal hole 212. In the present embodiment, the second fixing portion 222 is curled into a shaft segment shape with a shoulder by stamping. When the wire end terminal 22 is implanted forward into the second terminal hole 212, the front end shoulder of the second fixing portion 222 is supported by the corresponding step of the second terminal hole 212, and the rear end shoulder of the second fixing portion 222 is supported by the hanging foot 232 of the insert 23, thereby restricting the wire end terminal 22 in the second terminal hole 212. This structure not only meets the installation and use of the wire end terminal 22, but also has maintenance and replacement characteristics.

[0029] The utility model realizes the dual plug-in connection of the board-end connector and the line-end connector by inter-plugging the board-end insulating seat and the line-end insulating seat, as well as the board-end terminal and the line-end terminal. The connection is stable and can maintain a firm contact between the terminals and a stable current. At the same time, the structure of the board-end terminal and the line-end terminal is designed to not only obtain a larger contact area to meet the requirements of large current, but also effectively reduce the plug-in and plug-out force of the male and female terminals, making the plug-in implementation easier. Furthermore, the first fixed part of the board-end terminal has two side-standing spring sheets that are bent from the rear end of the blade-shaped contact part and form a left-right symmetry. Each side-standing spring sheet leads to a welding foot to increase the stability of the upper plate welding. The two side-standing spring sheets can also increase the current transmission. The two side-standing spring sheets are convenient to be embedded in the first terminal hole and obtain a tight fit. After the line-end terminal is implanted forward into the second terminal hole, it is restricted by a movable support top method. Not only a stable assembly structure can be obtained, but also assembly and maintenance are convenient, which is suitable for automated production.

[0030] Although the preferred specific embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention should not be limited to the structures and operations that are exactly the same as the above description and the accompanying drawings. For those skilled in the art, many equivalent improvements and changes can be made to the above embodiments through logical analysis, reasoning or limited experiments without exceeding the concept and scope of the present invention, but these improvements and changes should all fall within the scope of protection required by the present invention.

Claims

1. A board-to-wire connector, comprising a board-end connector (1) and a wire-end connector (2) that are matingly plugged into each other, characterized in that: The board-end connector (1) comprises a board-end insulating seat (11) and a plurality of board-end terminals (12); the board-end insulating seat (11) is provided with a plug-in slot (111) at the front end and a plurality of first terminal holes (112) opened from the rear end and extending to the plug-in slot (111); the board-end terminal (12) is implanted and installed corresponding to the first terminal hole (112), and the board-end terminal (12) comprises a blade-shaped contact portion (121) protruding into the plug-in slot (111) and in a side-standing posture, a first fixing portion (122) positioned in the first terminal hole (112), and a welding foot (123) extending from the first fixing portion (122); the first fixing portion (122) comprises two side-standing spring sheets (1221) bent from the rear end of the blade-shaped contact portion (121) to form left-right symmetry, and each side-standing spring sheet (1221) leads to a welding foot (123); The wire end connector (2) comprises a wire end insulating seat (21) and a plurality of wire end terminals (22); the wire end insulating seat (21) is provided with a plug-in portion (211) and a plurality of second terminal holes (212); the plug-in portion (211) is used for docking and assembly with the plug-in slot (111); the second terminal holes (212) are used for assembling the wire end terminals (22); one end of the second terminal hole (212) extends to the end of the plug-in portion (211) to form a plug hole (213); the plug hole (213) is provided with a plurality of second terminal holes (212); 3) has a shape and size matching that of the blade-shaped contact portion (121); the line end terminal (22) comprises an insertion contact portion (221), a second fixing portion (222) and a wiring portion (223); the insertion contact portion (221) extends into the plug-in portion (211) and forms a clamping cavity (2211) on the insertion contact portion (221); the blade-shaped contact portion (121) is inserted into the clamping cavity (2211) through the insertion hole (213) and is electrically connected to the insertion contact portion (221).

2. The board-to-wire connector according to claim 1, characterized in that: The board-end connector (1) and the line-end connector (2) are in a horizontal form, the board-end insulating seat (11) and the line-end insulating seat (21) are flat, the first terminal hole (112) and the second terminal hole (212) are both linear step holes, and the first terminal holes (112) are evenly arranged in a row along the flat direction of the board-end insulating seat (11), and the second terminal holes (212) are evenly arranged in a row along the flat direction of the line-end insulating seat (21); the board-end terminal (12) and the line-end terminal (22 ) are formed by stamping of copper material; the thickness of the blade-shaped contact portion (121) of the plate-end terminal (12) is twice that of the side spring sheet (1221); the plug-in contact portion (221) of the line-end terminal (22) is a structure of elastic curved arms (2212) obtained by stamping and formed to be symmetrical on the left and right, the clamping cavity (2211) is formed between the two elastic curved arms (2212), and the left and right elastic curved arms (2212) clamp the blade-shaped contact portion (121).

3. The board-to-wire connector according to claim 1 or 2, characterized in that: The corresponding parts of the left and right sides of the front end of the plate end insulating seat (11) respectively extend forward to form clamping arms (113), a plug-in slot (111) is formed between the two clamping arms (113), and an introduction slot (1131) is provided on the inner side of the clamping arm (113), and the introduction slot (1131) extends along the length direction of the clamping arm (113); the corresponding outer side of the plug-in portion (211) of the wire end insulating seat (21) is provided with a locking spring arm (214), the locking spring arm (214) is inserted and assembled corresponding to the introduction slot (1131) and forms an anti-retraction clamping connection with the clamping arm (113).

4. The board-to-wire connector according to claim 1 or 2, characterized in that: The wire end insulating seat (21) is provided with an embedding groove (215) connected to the second terminal hole (212); the embedding groove (215) is used for assembly of the insert (23); and the insert (23) restricts the wire end terminal (22) so that the wire end terminal (22) is stabilized in the second terminal hole (212).

5. The board-to-wire connector according to claim 4, characterized in that: The embedding groove (215) is a long strip-shaped recessed groove that is concave downward from the upper side of the wire end insulating seat (21), and the embedding groove (215) is in the form of intercepting the second terminal hole (212). Communication holes (2151) are respectively provided on the inner bottom of the embedding groove (215) corresponding to different second terminal holes (212); the insert (23) comprises a long strip body (231) and a hanging foot (232) extending from the long strip body (231), the long strip body (231) is embedded in the embedding groove (215), the hanging foot (232) is inserted into the second terminal hole (212) through the connecting hole (2151), and the hanging foot (232) abuts against the rear end of the second fixing portion (222) in the second terminal hole (212), so that the wire end terminal (22) cannot retreat after being implanted forward into the second terminal hole (212).

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