Screw-free connector and mounting structure thereof
By using a screwless snap-fit spring and a barbed structure on the male pin, the problems of long wiring time and loosening of traditional connectors are solved, achieving efficient and stable wiring connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG RADIANT TECH
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional connectors require screws for fixing, which leads to long wiring time and easy loosening during long-term use.
It adopts a screwless design, using a snap-fit spring and barbed structure of male pins to lock the wires, and reinforced with ribs to enhance the stability of the snap-fit spring. Combined with the plug-in wire clamping cover and locking structure, it prevents loosening.
Significantly reduces wiring time, improves wiring efficiency, enhances wire locking stability, extends service life, and reduces costs.
Smart Images
Figure CN224217823U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a connector, and more particularly to a screwless connector and its mounting structure. Background Technology
[0002] Currently, traditional connectors typically use screw-fixed terminals, requiring screws to be tightened after wire insertion. This results in longer wiring times and significantly reduces wiring efficiency. Furthermore, traditional plug-in connectors lack a locking mechanism, which can loosen over time, affecting their normal operation. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a screwless connector that can significantly shorten wiring time.
[0004] To solve the first technical problem mentioned above, the technical solution adopted by this utility model is as follows: a screwless connector, comprising: a connector housing and a screwless insert, wherein the connector includes: a connector housing and at least two female pins arranged side by side in the connector housing and extending out of the connector housing; the screwless insert includes: an insert housing, wherein a male pin corresponding to the female pin is provided in the insert housing, and a tubular insertion part is provided on one side of the insert housing to cooperate with the female pin, wherein the male pin extends into the corresponding tubular insertion part. The plug housing has a wiring hole corresponding to the male pin on its other side; a spring plate mounting cavity is provided below the rear end of the male pin in the plug housing, and a snap-fit spring plate is provided in the spring plate mounting cavity. The snap-fit spring plate includes: a support part abutting against the bottom wall of the spring plate mounting cavity, a wire-clamping part tilting towards the side of the plug housing where the tubular insertion part is provided, and an arc-shaped connecting part connecting the wire-clamping part and the support part. A wire-clamping opening is provided at the top of the wire-clamping part, and a snap-fitting plane is provided at the rear end of the male pin on the side of the wire-clamping part facing the snap-fit spring plate.
[0005] As a preferred embodiment, in the aforementioned screwless connector, the inner sidewall of the spring mounting cavity is provided with an extended blocking portion above the support portion for engaging the spring.
[0006] As a preferred embodiment, in the aforementioned screwless connector, the connector housing is provided with a stopper for blocking the snap-fit spring. The stopper includes a stopper base and a stopper insert disposed on the stopper base corresponding to the snap-fit spring. Specifically, the connector housing has a corresponding insertion hole for the snap-fit spring. The stopper insert is inserted into the insertion hole of the connector housing and onto the outside of the corresponding snap-fit spring. The stopper insert has a through hole for wiring opposite the male pin, forming a wiring hole. The stopper base abuts against the connector housing.
[0007] As a preferred embodiment, in the aforementioned screwless connector, the snap-fit spring has at least one longitudinally continuous reinforcing rib on each side of the snap-fit opening on the snap-fit portion and the connecting portion.
[0008] As a preferred embodiment, in the aforementioned screwless connector, the connector housing is further covered with a connector wire clamping cover. The connector wire clamping cover has a downward-opening wire passage on one end wall corresponding to the wiring hole, and an installation port that mates with the tubular insertion part on the other end wall. The inner wall of the connector wire clamping cover is also provided with a wire clamping protrusion that mates with the wire passage, and a wire retaining groove is provided on the end face of the wire clamping protrusion.
[0009] As a preferred embodiment, in the aforementioned screwless connector, the connector housing is provided with snap-fit bosses on its two side walls, and the connector housing is also provided with at least one positioning hole. Correspondingly, the connector wire clamping cover is provided with snap-fit grooves corresponding to the snap-fit bosses on the connector housing and positioning pins corresponding to the positioning holes on a pair of side walls. The top of the snap-fit boss is provided with a guide surface whose height gradually decreases from the inside to the outside. During installation, the positioning pin is aligned with the corresponding positioning hole on the connector housing, and the snap-fit boss is snapped into the corresponding snap-fit groove on the connector wire clamping cover.
[0010] This utility model also provides a connector installation structure, including: the screwless connector of this utility model, and a junction box for installing the connector in the screwless connector. The junction box is provided with a conversion printed circuit board. The connector of the screwless connector is disposed on the conversion printed circuit board and connected to a conversion terminal block also disposed on the conversion printed circuit board. The junction box includes: a base box and a flip cover rotatably disposed on the base box. The base box has a mating window at one end and a wiring port at the other end. The base box has two rows of base box wire pressing teeth near the wiring port. The flip cover has two rows of flip cover wire pressing teeth corresponding to the base box wire pressing teeth at its corresponding end, i.e., its opening and closing end.
[0011] As a preferred embodiment, in the aforementioned connector installation structure, the flip cover has toothed strips on both sides near the opening and closing end, and the bottom box has corresponding slots for the toothed strips. When the cover is closed, the toothed strips on the flip cover are engaged in the corresponding slots on the bottom box.
[0012] As a preferred embodiment, in the aforementioned connector installation structure, the bottom box is provided with a locking extension frame above the interlocking window, and the connector wire clamping cover is provided with a locking extension hook corresponding to the locking extension frame.
[0013] As a preferred embodiment, in the aforementioned connector installation structure, the base box has a locking through hole centered between two rows of base box pressure teeth, and the flip cover has a locking post corresponding to the locking through hole on the base box. The end face of the locking post has a locking hole. When the flip cover needs to be locked, a screw is selected, passes through the locking through hole on the base box, and is tightened into the locking hole on the locking post on the flip cover.
[0014] The beneficial effects of this utility model are:
[0015] 1. The screwless connector of this utility model has a snap-fit spring plate installed below the inner end of the male pin in the connector housing. The wire-clamping part of the snap-fit spring plate is tilted towards the side of the male pin that extends out of the connector housing to form a barbed structure. By opening a wire-clamping hole at the top of the snap-fit spring plate, which cooperates with the snap-fitting plane at the inner end of the male pin, the core wire of the wire inserted from the wiring hole is directly locked, eliminating the need for screw tightening. This greatly shortens the wiring time and improves the wiring efficiency.
[0016] 2. The screwless connector of this utility model greatly increases the strength of the snap-fit spring by setting continuous reinforcing ribs on the wire-clamping part and the connecting part of the snap-fit spring, so that the snap-fit spring can lock the wire more stably.
[0017] 3. The screwless connector of this utility model provides a wire pressing protrusion on the inner wall of the connector wire pressing cover and a wire clamping groove on the end face of the wire pressing protrusion, so that the wire can be stably pressed in the connector wire pressing cover, further ensuring that the wire will not slip off the clamping spring.
[0018] 4. The connector in the screwless connector of this utility model is connected to the adapter terminal block through the adapter printed circuit board and is covered by the junction box. In this way, all the wiring is not exposed, which extends the service life of the screwless connector and the terminal block and reduces the cost of use.
[0019] 5. This utility model provides a locking extension frame on the bottom box and a corresponding locking extension hook on the plug-in wire clamping cover, ensuring that the connectors and plugs in the screwless connector will not loosen during use and guaranteeing reliable contact between them.
[0020] 6. This utility model provides a locking through hole on the bottom box and a locking post on the flip cover. A locking hole is provided on the end face of the locking post. This allows the flip cover to be opened without tools after it is closed, by passing a screw through the locking through hole on the bottom box and tightening it in the locking hole on the locking post of the flip cover. Attached Figure Description
[0021] Figure 1This is a schematic diagram of the installation structure of the screwless connector described in this utility model.
[0022] Figure 2 yes Figure 1 Schematic diagram of the AA section structure.
[0023] Figure 3 This is an exploded structural diagram of the screwless connector installation structure described in this utility model.
[0024] Figures 4 to 7 This is an exploded structural diagram of the plug in a screwless connector from four perspectives.
[0025] Figure 8 This is a schematic diagram of the screwless connector without the mounting baffle and connector housing.
[0026] Figures 1 to 8 The reference numerals in the attached drawings are as follows: 1. Plug-in wire clamping cover; 102. Snap-fit groove; 103. Wire passage port; 104. Mounting port; 12. Wire clamping protrusion; 121. Wire clamping groove; 13. Positioning post; 15. Locking extension hook; 2. Junction box; 20. Base box; 203. Support hole; 204. Plug-in window; 205. Locking extension frame; 206. Bayonet; 207. Locking through hole; 208. Base box wire clamping teeth; 209. Wire connection port; 21. Flip cover; 213. Support shaft; 214. Auxiliary groove; 216. Snap-fit rack; 217. Locking post; 218. Flip cover wire clamping teeth; 3. Plug-in; 30. Plug-in housing; 301. Tubular insertion part. 302. Snap-fit boss; 3021. Guide slope; 303. Positioning hole; 304. Insertion hole; 309. Spring mounting cavity; 3091. Extended barrier part; 31. Male pin; 311. Rear end; 33. Snap-fit spring; 330. Support part; 331. Wire clamping part; 3311. "V" shaped wire clamping port; 332. Arc-shaped connecting part; 337. Reinforcing rib; 34. Barrier component; 340. Barrier seat; 3403. Positioning through hole; 341. Barrier insert; 3401. Wiring hole; 3411. Wiring hole; 4. Connector; 40. Connector housing; 41. Female pin; 50. Printed circuit board for adapter; 51. Adapter terminal block. Detailed Implementation
[0027] The following describes in detail, with reference to the accompanying drawings, a detailed implementation scheme of the screwless connector and its installation structure according to this utility model.
[0028] like Figures 1 to 3As shown, the mounting structure of a screwless connector according to this utility model includes: a screwless connector composed of a connector 4 (also called a female connector) and a screwless plug 3 (also called a male connector), and a junction box 2 for mounting the connector 4. The junction box 2 includes: a base box 20 and a flip cover 21 rotatably mounted on the base box 20. A printed circuit board 50 for adapters is disposed in the base box 20 (this is conventional technology in the art and will not be described in detail here). The connector 4 is disposed on the printed circuit board 50 for adapters and connects to the connector 3 also disposed on the printed circuit board 50 for adapters. The junction box 2 is connected to the wire base 51; the specific arrangement of the junction box 2 is as follows: the two side walls of the bottom box 20 are provided with corresponding support holes 203 at corresponding ends, and the flip cover 21 is provided with support shafts 213 on its two side walls that correspond to the support holes 203 on the bottom box 20. The corresponding end of the flip cover 21 is provided with an upward-opening auxiliary groove 214 near the corresponding support shaft 213. When installing the flip cover 21, the distance between the two support shafts 213 on the flip cover 21 can be flexibly changed, so that the support shafts 213 can be more easily inserted into the corresponding support holes 203 on the bottom box 20; the bottom box 20 at its corresponding end ( Figure 3 A matching window 204 is provided at the left end of the middle, and at the other end ( Figure 3 The bottom box 20 has a wiring port 209 at its right end. Two rows of bottom box wire pressing teeth 208 are provided on the bottom box 20 near the wiring port 209. A latch 206 is provided on both sides between the two rows of bottom box wire pressing teeth 208 in the bottom box 20. A locking through hole 207 is provided in the center between the two rows of bottom box wire pressing teeth 208 in the bottom box 20. The flip cover 21 has a corresponding end, i.e., its opening / closing end (…). Figure 3 The right end of the flip cover 21 has two rows of flip cover wire pressing teeth 218 corresponding to the bottom box wire pressing teeth 208. The flip cover 21 has toothed strips 216 on both sides near the opening end, corresponding to the latches 206 on the bottom box 20. When the cover is closed, the toothed strips 216 on the flip cover 21 are engaged in the corresponding latches 206 on the bottom box 20. The flip cover 21 has locking posts 217 corresponding to the locking through holes 207 on the bottom box 20. Locking holes are provided on the end faces of the locking posts 217 (a common technique in the art, not described further here). The connector 4 includes: a connector housing 40, and three female pins 41 (one phase wire, one neutral wire, and one ground wire) arranged side-by-side in the connector housing 40 and extending out of the connector housing 40. Figures 1 to 7 As shown, the screwless insert 3 includes: an insert housing 30, in which a male pin 31 corresponding to the female pin 41 is disposed, and the insert housing 30 is located on one side of its ( Figure 4On the right side of the connector, a tubular insertion part 301 is provided to mate with the female connector pin 41. The male connector pin 31 extends into the corresponding tubular insertion part 301. In the plug housing 30, at the rear end of the male connector pin 31 ( Figure 2 A spring mounting cavity 309 is provided below the left end of the spring mounting cavity 309. The inner side of the spring mounting cavity 309 is... Figure 2 A protruding blocking part 3091 is provided on the right end side wall of the spring housing 309, and a snap-fit spring 33 is provided in the spring housing 309. The snap-fit spring 33 includes: a support part 330 located below the protruding blocking part 3091 and abutting against the bottom wall of the spring housing 309; and a wire-locking part 331 tilted towards the side of the insert housing 30 where the tubular insertion part 301 is provided, i.e., the insertion side (see...). Figure 8As shown), and the arc-shaped connecting part 332 connecting the wire-clamping part 331 and the support part 330, the top end of the wire-clamping part 331 is provided with a "V"-shaped wire-clamping opening 3311, and the wire-clamping part 331 and the arc-shaped connecting part 332 of the snap-fit spring 33 are respectively provided with a longitudinally continuous reinforcing rib 337 on both sides of the "V"-shaped wire-clamping opening 3311; the rear end 311 of the male pin 31 is flat, so that a snap-fit plane is formed on the side facing the snap-fit spring 33; the plug housing 30 is provided with a blocking member 34 for blocking the snap-fit spring 33, the blocking member 34 includes: a blocking seat 340, and a setting On the barrier seat 340, there is a barrier insert 341 corresponding to the snap-fit spring 33; the specific installation method is as follows: the plug housing 30 has a socket 304 corresponding to the snap-fit spring 33, the barrier insert 341 is inserted into the socket 304 of the plug housing 30, and is inserted on the outside of the corresponding snap-fit spring 33 to block the snap-fit spring 33 on the inside, the barrier insert 341 has a wiring through hole facing the male pin 31 to form a wiring hole 3411, the barrier seat 340 abuts against the plug housing 30; the plug housing 30 is covered with a plug wire clamping cover 1, the specific setting method is as follows: the plug The housing 30 has snap-fit protrusions 302 on its two side walls. The plug-in housing 30 has two positioning holes 303. Correspondingly, the barrier seat 340 has positioning through holes 3403 that correspond one-to-one with the positioning holes 303 on the plug-in housing 30. The plug-in wire clamping cover 1 has snap-fit grooves 102 corresponding to the snap-fit protrusions 302 on the plug-in housing 30 and positioning posts 13 corresponding to the positioning holes 303 on its pair of side walls. The top of the snap-fit protrusion 302 has a guide slope 3021 that gradually decreases in height from the inside out. During installation, the positioning... Positioning post 13 passes sequentially through positioning through hole 3403 on stop seat 340 and corresponding positioning hole 303 on plug housing 30, and engages locking protrusion 302 in corresponding locking groove 102 on plug wire pressure cover 1; plug wire pressure cover 1 has a downward opening wire passage 103 on one end wall corresponding to wiring hole 3401, and an installation port 104 that cooperates with the tubular insertion part 301 on the other end wall. The inner wall of plug wire pressure cover 1 is also provided with a wire pressure protrusion 12 that cooperates with wire passage 103, and a wire locking groove 121 is provided on the end face of wire pressure protrusion 12.
[0029] In practical applications, the bottom box 20 is provided with a locking extension frame 205 above the insertion window 204, and the plug-in wire cover 1 is provided with a locking extension hook 15 corresponding to the locking extension frame 205.
[0030] In actual use, when plug-in 3 and connector 4 are connected together, the locking extension hook 15 on the plug-in wire clamping cover 1 will hook the locking extension frame 205, ensuring that the male pin 31 and female pin 41 will not loosen during use and guaranteeing reliable contact between the two. At this time, the flip cover 21 can be closed, and the toothed strip 216 on the flip cover 21 is engaged in the corresponding slot 206 on the base box 20; if locking is required, a screw can be selected, passing through the locking through hole 207 on the base box 20, and tightened into the locking hole on the locking post 217 on the flip cover 21.
[0031] In summary, the above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made to the shape, structure, features and spirit described in the claims of the present utility model should be included within the scope of the claims of the present utility model.
Claims
1. A screwless connector, comprising: A connector and a screwless insert, the connector comprising: a connector housing and at least two female pins arranged side-by-side in the connector housing and extending out of the connector housing; the screwless insert comprising: an insert housing, the insert housing having a male pin corresponding to the female pin, the insert housing having a tubular insertion portion on one side that mates with the female pin, the male pin extending into the corresponding tubular insertion portion, and the insert housing having a wiring hole corresponding to the male pin on the other side; characterized in that, the insert housing has a spring plate mounting cavity below the rear end of the male pin, the spring plate mounting cavity having a snap-fit spring plate, the snap-fit spring plate comprising: a support portion abutting against the bottom wall of the spring plate mounting cavity, a wire-clamping portion tilting towards the side of the insert housing where the tubular insertion portion is located, and an arc-shaped connecting portion connecting the wire-clamping portion and the support portion, the top end of the wire-clamping portion having a wire-clamping opening, and the rear end of the male pin having a snap-fit surface on the side facing the wire-clamping portion of the snap-fit spring plate.
2. A screwless connector according to claim 1, characterized in that: The inner sidewall of the reed mounting cavity is provided with an extended blocking part above the support part for snapping the reed.
3. A screwless connector according to claim 1, characterized in that: The plug housing is provided with a stopper for blocking the snap-fit spring. The stopper includes a stopper seat and a stopper insert corresponding to the snap-fit spring on the stopper seat. The specific installation method is as follows: the plug housing has a hole corresponding to the snap-fit spring. The stopper insert is inserted into the hole of the plug housing and inserted on the outside of the corresponding snap-fit spring. The stopper insert has a through hole for wiring facing the male pin, forming a wiring hole. The stopper seat abuts against the plug housing.
4. A screwless connector according to claim 1, characterized in that: The snap-fit spring has at least one longitudinally continuous reinforcing rib on each side of the snap-fit opening on the snap-fit part and the connecting part.
5. A screwless connector according to claim 1, characterized in that: The plug housing is also covered with a plug wire clamping cover. The plug wire clamping cover has a downward-opening wire passage on one end wall corresponding to the wiring hole, and an installation port that mates with the tubular insertion part on the other end wall. The inner wall of the plug wire clamping cover is also provided with a wire clamping protrusion that mates with the wire passage. A wire clamping groove is provided on the end face of the wire clamping protrusion.
6. A screwless connector according to claim 5, characterized in that: The plug housing has snap-fit protrusions on its two side walls and at least one positioning hole. Correspondingly, the plug wire cover has snap-fit grooves on its two side walls that correspond to the snap-fit protrusions on the plug housing and positioning pins that correspond to the positioning holes. The top of the snap-fit protrusion has a guide surface that gradually decreases in height from the inside to the outside. During installation, the positioning pin is aligned with the corresponding positioning hole on the plug housing, and the snap-fit protrusion is snapped into the corresponding snap-fit groove on the plug wire cover.
7. A connector mounting structure, comprising: The screwless connector according to any one of claims 1 to 6, and the junction box for installing the connector in the screwless connector, characterized in that: the junction box is provided with a conversion printed circuit board, the connector of the screwless connector is disposed on the conversion printed circuit board and connected to a conversion terminal block also disposed on the conversion printed circuit board through the conversion printed circuit board; the junction box includes: a base box and a flip cover rotatably disposed on the base box, the base box has a plug-in window at one end and a wiring port at the other end, the base box has two rows of base box wire pressing teeth near the wiring port, and the flip cover has two rows of flip cover wire pressing teeth corresponding to the base box wire pressing teeth at its corresponding end, i.e., its opening and closing end.
8. The connector mounting structure according to claim 7, characterized in that: The flip cover has toothed strips on both sides near the opening and closing end, and the bottom box has corresponding slots for the toothed strips. When the cover is closed, the toothed strips on the flip cover are engaged in the corresponding slots on the bottom box.
9. The connector mounting structure according to claim 7, characterized in that, The bottom box has a locking extension frame above the insertion window, and the plug-in wire cover has a locking extension hook corresponding to the locking extension frame.
10. The connector mounting structure according to claim 7, characterized in that, The bottom box has a locking through hole centered between the two rows of bottom box pressure teeth. The flip cover has a locking post corresponding to the locking through hole on the bottom box. The end face of the locking post has a locking hole. When the flip cover needs to be locked, a screw is selected, passes through the locking through hole on the bottom box, and is tightened into the locking hole on the locking post on the flip cover.