PCB wire harness assembly

Abstract

The utility model discloses a kind of PCB straight insertion type wiring harness assembly, including PCB board and plug, socket and clamping slot are equipped on PCB board, contact is equipped at socket, plug includes shell and terminal, buckle, through-hole and partition are equipped on shell, through-hole includes the upper through-hole, middle through-hole and lower through-hole that are interconnected, terminal includes contact piece, cooperation part and wire pressing part, limit structure is equipped between through-hole and cooperation part, mounting hole is equipped on shell, wire pressing part includes conductor pressing foot and insulating layer pressing foot, limiting block that is protruding to conductor pressing foot and insulating layer pressing foot simultaneously is inserted on mounting hole, preventing block is equipped on limiting block, protruding end that is protruding to conductor pressing foot is equipped on limiting block, limiting block can reduce the width in lower through-hole, so that plug is inserted and unplugged, the connection of wire and wire pressing part is not easy to swing due to plug insertion and unplug.

Description

Technical Field

[0001] This utility model belongs to the field of PCB-related technology, specifically relating to a PCB through-hole wire harness assembly. Background Technology

[0002] PCBs are crucial components in the electronics industry, widely used in various electronic devices. The connection method between the PCB and the connector varies depending on the application. For scenarios with frequent insertions and removals, a direct-plug connection is typically used. The PCB has contacts, and the connector includes a housing and terminals. The housing has through-holes for terminal insertion, and a limiting structure prevents terminal detachment between the through-holes and the terminals. The terminals contact the contacts via elastic contact tabs and are secured to the wires by wire clamps. To ensure stable contact between the contact tabs and the contacts, some connectors are secured to the PCB by clips on the housing.

[0003] When the plug is inserted or removed, the wires swing, causing the connection between the wires and the clamping part to swing within the through hole. To facilitate contact deformation, the contact pieces require more space than the clamping part. Most existing housings are integrally designed, with the through hole size determined by the space required for the contact area. This results in a large gap between the clamping part and the through hole. After repeated insertion and removal, the wires can easily become loose between them, leading to poor contact. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a PCB through-hole wire harness assembly that is less prone to wobbling between the wire and the pressure part.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a PCB through-hole wire harness assembly, including a PCB board and a plug. The PCB board is provided with a socket and a slot. The socket is provided with at least two contacts. The plug includes a housing and terminals. The housing is provided with a buckle that engages with the slot, at least two through holes for inserting terminals, and a partition plate that separates adjacent through holes. The through holes include an upper through hole, a middle through hole, and a lower through hole that are interconnected. The terminals include a contact piece located in the upper through hole, a mating part located in the middle through hole, and a wire pressing part located in the lower through hole. A limiting structure is provided between the through hole and the mating part. The housing is provided with a mounting hole that communicates with the lower through hole. The wire pressing part includes a conductor pressing foot and an insulating pressing foot. A limiting block that protrudes simultaneously toward the conductor pressing foot and the insulating pressing foot is inserted into the mounting hole. The limiting block is provided with an anti-detachment block that forms a limiting position with the opening of the mounting hole located in the lower through hole. The limiting block is provided with a protruding end that protrudes toward the conductor pressing foot.

[0006] By adopting the above scheme, the limiting block can reduce the inner width of the lower through hole, making it less likely for the connection between the wire and the clamping part to swing due to plug insertion and removal. The wire includes a conductor and an insulating layer wrapped around the conductor. The conductor clamping foot presses on the conductor, and the insulating layer clamping foot presses on the conductor with the insulating layer. After the clamping part is fixed to the wire, the conductor clamping foot is narrower than the insulating layer clamping foot. The presence of the protruding end creates a step on the surface of the limiting block facing the clamping part, which can better restrict the clamping part.

[0007] As a further feature of this utility model, the mounting hole communicates with all the lower through holes, the limiting block is provided with a slot for inserting a partition plate, and the two opposite side walls of the limiting block are provided with positioning blocks; when the number of through holes is equal to two, the inner walls of the two lower through holes that are far apart from each other are provided with positioning grooves for inserting positioning blocks; when the number of through holes is greater than two, the inner walls of the two lower through holes that are far apart from each other are provided with positioning grooves for inserting positioning blocks.

[0008] Using the above scheme, the cooperation between the slot and the partition plate, and the cooperation between the positioning block and the positioning groove, keeps the limiting block and the housing relatively fixed.

[0009] As a further feature of this utility model, the anti-detachment block is located on the side of the limiting block away from the central through hole, and the inner wall of the mounting hole away from the central through hole is provided with a notch extending to the opening of the mounting hole away from the lower through hole. The number of notches is the same as the number of through holes. The notch includes a groove bottom facing the central through hole and a groove wall that is inclined. The side of the groove wall away from the groove bottom is inclined towards the lower through hole.

[0010] Using the above scheme, the notches serve a guiding function, facilitating the alignment of the anti-detachment block with the through hole and allowing the anti-detachment block to enter the lower through hole from the mounting hole. Preferably, when the number of notches is less than or equal to four, the number of notches is the same as the number of anti-detachment blocks; when the number of notches is greater than four, if the number of notches is even, the number of notches is twice the number of anti-detachment blocks; if the number of notches is odd, the number of notches plus one is twice the number of anti-detachment blocks.

[0011] As a further feature of this invention, a stepped surface is provided at the connection between the surface of the limiting block away from the pressure line and the surface of the limiting block away from the through hole. The number of stepped surfaces is the same as the number of anti-detachment blocks, and a groove is provided on the surface of the stepped surface facing the notched groove.

[0012] Using the above solution, the stepped surface allows the limiting block to deform to a certain extent when the anti-detachment block enters the lower through hole from the mounting hole, facilitating the anti-detachment block's entry into the lower through hole.

[0013] As a further feature of this utility model, the limiting structure includes an upper limiting block, a lower limiting block, and a protrusion. The upper limiting block and the lower limiting block are both located on the inner wall of the central through hole. The mating part is cylindrical and located between the upper limiting block and the lower limiting block. The mating part abuts against the surface of the limiting block facing the central through hole, and the surface of the mating part away from the lower through hole abuts against the upper limiting block. The protrusion is disposed on the mating part and abuts against the lower limiting block.

[0014] The above-described design features a simple structure that keeps the terminals and housing relatively fixed. Preferably, the protrusion is cut and raised from the side wall of the mating part, facilitating processing.

[0015] As a further feature of this invention, there are two card slots and the distance between the two card slots is less than or equal to the width of the socket, and all the contacts are located between the two card slots.

[0016] The above solution ensures that the plug is stably fixed to the PCB board, and that the force on both sides of the plug is even when plugging or unplugging.

[0017] As a further feature of this utility model, the buckle includes a pressing part, a connecting part, and a snap-fit ​​arm, and there are two connecting parts; when there are two through holes, the two connecting parts are arranged opposite to the two through holes; when there are more than two through holes, the two connecting parts are arranged opposite to the two through holes that are furthest apart.

[0018] Using the above method, the force on both sides of the plug is even when it is plugged in or unplugged.

[0019] As a further feature of this invention, there are two snap-fit ​​arms, and the connecting part is located between the two snap-fit ​​arms.

[0020] Using the above solution, when pressing the pressing part, the two locking arms are evenly stressed.

[0021] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0022] Appendix Figure 1 The accompanying diagram shows a specific embodiment of this utility model. Appendix Figure 2 This is a schematic diagram of the housing of a specific embodiment of the present utility model; Appendix Figure 3 This is a bottom view of the housing of a specific embodiment of the present utility model; Appendix Figure 4 This is a schematic diagram of the terminals in a specific embodiment of the present utility model; Appendix Figure 5 This is a schematic diagram of the limiting block in a specific embodiment of the present utility model; Appendix Figure 6 This is a cross-sectional view of the limiting block and the shell in a specific embodiment of the present utility model.

[0023] PCB board 1, socket 11, slot 12, contact 13, plug 2, housing 3, buckle 31, pressing part 311, connecting part 312, snap-fit ​​arm 313, through hole 32, upper through hole 321, middle through hole 322, lower through hole 323, partition plate 33, mounting hole 34, positioning groove 35, notched groove 36, groove bottom 361, groove wall 362, upper limit block 37, lower limit block 38, terminal 4, contact piece 41, mating part 42, protrusion 421, wire pressing part 43, conductor pressing foot 431, insulating layer pressing foot 432, limiting block 5, slot 51, anti-detachment block 52, protruding end 53, positioning block 54, stepped surface 55, groove 56, wire 6, conductor 61, insulating layer 62. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise specified, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Specific embodiments of this utility model are shown in the accompanying drawings.

[0027] A PCB through-hole wire harness assembly includes a PCB board 1, a housing 3, and terminals 4. The PCB board 1 has a socket 11 and a slot 12. In this embodiment, the socket 11 has five contacts 13. The plug 2 includes a housing 3 and terminals 4. The housing 3 has a buckle 31 that engages with the slot 12, five through holes 32 for the terminals 4 to be inserted, and a partition plate 33 that separates adjacent through holes 32. The through holes 32 include an upper through hole 321, a middle through hole 322, and a lower through hole 323 that are interconnected. The terminals 4 include a contact piece 41 located in the upper through hole 321, a mating part 42 located in the middle through hole 322, and a wire clamping part 43 located in the lower through hole 323.

[0028] The housing 3 is provided with mounting holes 34 that communicate with all the lower through holes 323. The wire pressing part 43 includes conductor pressing foot 431 and insulation pressing foot 432. A limiting block 5 that protrudes into both conductor pressing foot 431 and insulation pressing foot 432 is inserted into the mounting hole 34. The limiting block 5 is provided with a slot 51 for inserting the partition plate 33, and is provided with an anti-detachment block 52 that limits the mounting hole 34 located at the opening of the lower through hole 323. The limiting block 5 is provided with a protruding end 53 that protrudes into the conductor pressing foot 431.

[0029] The limiting block 5 reduces the inner width of the lower through hole 323, making the connection between the wire 6 and the wire clamping part 43 less prone to loosening due to repeated insertion and removal of the plug 2. The wire 6 includes a conductor 61 and an insulating layer 62 wrapped around the conductor 61. The conductor clamping foot 431 presses on the conductor 61, and the insulating layer clamping foot 432 is on the conductor 61 with the insulating layer 62. After the wire clamping part 43 is fixed to the wire 6, the conductor clamping foot 431 is narrower than the insulating layer clamping foot 432. The presence of the protruding end 53 makes the surface of the limiting block 5 facing the wire clamping part 43 form a step, which can better restrict the wire clamping part 43.

[0030] Positioning blocks 54 are provided on the opposite side walls of the limiting block 5. In this embodiment, positioning grooves 35 are provided on the inner walls of the two farthest lower through holes 323 for the positioning blocks 54 to be inserted. The cooperation between the slot 51 and the partition plate 33, the cooperation between the positioning block 54 and the positioning groove 35, and the cooperation between the anti-detachment block 52 and the mounting hole 34 located at the opening of the lower through hole 323, keep the limiting block 5 and the housing 3 relatively fixed.

[0031] The anti-detachment block 52 is located on the side of the limiting block 5 away from the central through hole 322. The inner wall of the mounting hole 34 away from the central through hole 322 has a notch 36 extending to the opening of the mounting hole 34 away from the lower through hole 323. The number of notches 36 is the same as the number of through holes 32. Each notch 36 includes a bottom 361 facing the central through hole 322 and an inclined wall 362. The side of the wall 362 away from the bottom 361 is inclined towards the lower through hole 323. The notches 36 serve a guiding function, facilitating the alignment of the anti-detachment block 52 with the through hole 32 and allowing the anti-detachment block 52 to enter the lower through hole 323 from the mounting hole 34. In this embodiment, the number of notches 36 plus one equals twice the number of anti-detachment blocks 52.

[0032] A stepped surface 55 is provided at the connection between the surface of the limiting block 5 away from the pressure line part 43 and the surface of the limiting block 5 away from the central through hole 322. The number of stepped surfaces 55 is the same as the number of anti-detachment blocks 52. A groove 56 is provided on the surface of the stepped surface 55 facing the notch 36, which is recessed in the direction away from the notch 36. The stepped surface 55 allows the limiting block 5 to undergo a certain deformation when the anti-detachment block 52 enters the lower through hole 323 from the mounting hole 34, facilitating the entry of the anti-detachment block 52 into the lower through hole 323.

[0033] An upper limit block 37 and a lower limit block 38 are provided on the inner wall of the through hole 322. The mating part 42 is cylindrical and located between the upper limit block 37 and the lower limit block 38. The mating part 42 abuts against the surface of the limiting block 5 facing the through hole 322. The surface of the mating part 42 away from the lower through hole 323 abuts against the upper limit block 37. A protrusion 421 is provided on the mating part 42, and the protrusion 421 abuts against the lower limit block 38. The presence of the upper limit block 37, the lower limit block 38, and the protrusion 421 can prevent the terminal 4 from detaching from the housing 3. In this embodiment, the protrusion 421 is cut and raised from the side wall of the mating part 42 for easy processing.

[0034] There are two slots 12, and the distance between the two slots 12 is less than the width of the socket 11. All contacts 13 are located between the two slots 12, and the two farthest contacts 13 are equidistant from their adjacent slots 12. This ensures that the plug 2 is stably fixed to the PCB board 1, and that the force on both sides of the plug 2 is even during insertion and removal.

[0035] The latch 31 includes a pressing part 311, a connecting part 312, and a locking arm 313. There are two connecting parts 312. In this embodiment, the two connecting parts 312 are arranged opposite to the two through holes 32 that are furthest apart. When the plug 2 is inserted or removed, the force on both sides of the plug 2 is even.

[0036] There are two snap-fit ​​arms 313, and the connecting part 312 is located between the two snap-fit ​​arms 313. This ensures that the two snap-fit ​​arms 313 are evenly stressed when the pressing part 311 is pressed.

[0037] This utility model is not limited to the specific embodiments described above. Those skilled in the art can implement this utility model using other specific embodiments based on the content disclosed in this utility model. Any simple changes or modifications made to the design structure and concept of this utility model will fall within the protection scope of this utility model.

Claims

1. A PCB through-hole wire harness assembly, comprising a PCB board and a plug, wherein the PCB board has a socket and a slot, the socket having at least two contacts, the plug comprising a housing and terminals, the housing having a buckle for engaging with the slot, at least two through holes for inserting the terminals, and a partition plate separating adjacent through holes, characterized in that: The through hole includes an upper through hole, a middle through hole, and a lower through hole that are interconnected. The terminal includes a contact piece located in the upper through hole, a mating part located in the middle through hole, and a wire pressing part located in the lower through hole. A limiting structure is provided between the through hole and the mating part. The housing is provided with a mounting hole that communicates with the lower through hole. The wire pressing part includes a conductor pressing foot and an insulating pressing foot. A limiting block that protrudes simultaneously toward the conductor pressing foot and the insulating pressing foot is inserted into the mounting hole. The limiting block is provided with an anti-detachment block that forms a limiting position with the opening of the mounting hole located in the lower through hole. The limiting block is provided with a protruding end that protrudes toward the conductor pressing foot.

2. The PCB through-hole wire harness assembly according to claim 1, characterized in that: The mounting hole communicates with all the lower through holes. The limiting block is provided with a slot for inserting a partition plate. Positioning blocks are provided on the opposite side walls of the limiting block. When the number of through holes is equal to two, positioning grooves for inserting positioning blocks are provided on the inner walls of the two lower through holes that are far apart from each other. When the number of through holes is greater than two, positioning grooves for inserting positioning blocks are provided on the inner walls of the two lower through holes that are far apart from each other.

3. A PCB through-hole wire harness assembly according to claim 2, characterized in that: The anti-detachment block is located on the side of the limiting block away from the central through hole. The inner wall of the mounting hole away from the central through hole is provided with a notch extending to the opening of the mounting hole away from the lower through hole. The number of notches is the same as the number of through holes. The notch includes a groove bottom facing the central through hole and a groove wall that is inclined. The side of the groove wall away from the groove bottom is inclined towards the lower through hole.

4. A PCB through-hole wire harness assembly according to claim 3, characterized in that: The connection between the surface of the limiting block away from the pressure line and the surface of the limiting block away from the central through hole is provided with a stepped surface. The number of stepped surfaces is the same as the number of anti-detachment blocks. The surface of the stepped surface facing the notched groove is provided with a groove.

5. A PCB through-hole wire harness assembly according to claim 4, characterized in that: The limiting structure includes an upper limiting block, a lower limiting block, and a protrusion. The upper limiting block and the lower limiting block are both located on the inner wall of the central through hole. The mating part is cylindrical and located between the upper limiting block and the lower limiting block. The mating part abuts against the surface of the limiting block facing the central through hole, and the surface of the mating part away from the lower through hole abuts against the upper limiting block. The protrusion is disposed on the mating part and abuts against the lower limiting block.

6. A PCB through-hole wire harness assembly according to claim 5, characterized in that: There are two card slots, and the distance between the two card slots is less than or equal to the width of the socket. All the contacts are located between the two card slots.

7. A PCB through-hole wire harness assembly according to claim 2 or 6, characterized in that: The buckle includes a pressing part, a connecting part, and a snap-fit ​​arm. There are two connecting parts. When there are two through holes, the two connecting parts are arranged opposite to the two through holes. When there are more than two through holes, the two connecting parts are arranged opposite to the two through holes that are furthest apart.

8. A PCB through-hole wire harness assembly according to claim 7, characterized in that: The snap-fit ​​arm has two parts, and the connecting part is located between the two snap-fit ​​arms.

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