N-type cable assembly connection structure based on threadless locking
Patent Information
- Application Number
- CN202522103612.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-29
AI Technical Summary
但在实际应用中，当电缆受到外力强行拉拽时，现有内扣式接扣结构存在明显缺陷，连接部位无法抵消或分散拉力，导致拉力直接集中于接扣表面，长期受力会造成接扣磨损加剧，甚至引发连接松动或损坏，严重影响电缆组件的信号传输稳定性与使用寿命；
本实用新型中，创新设计抗拉连接机构与缓冲机构协同防护，受拉时，对称防护管通过角度调整分散拉力，弹簧利用形变吸收拉力，过载时限位销脱开，导向杆挤压橡胶座缓冲槽实现防护，配合精准导向与气压平衡结构，全程避免拉力集中于接扣，无需复杂螺纹，可有效降低接扣磨损风险，保障N型电缆组件连接稳定性与使用寿命，适配频繁受拉场景。
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Figure CN224669101U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of N-type cable assembly connection technology, specifically to an N-type cable assembly connection structure based on threadless locking. Background Technology
[0002] In the field of N-type cable assembly connection, the threadless connection method has been widely used in scenarios with high requirements for connection efficiency, such as communication base stations, industrial measurement and control, and aerospace, due to its core advantages of not requiring tool assistance and simplifying operation steps. Among them, the internal snap-fit connection has become the mainstream choice in the current threadless connection technology because it can simplify operation while ensuring connection stability. Its design logic and matching mechanism fully reflect the balance between "convenience" and "reliability". The core structure of the internal snap-fit connector revolves around the precise fit between the male and female connectors. They are mechanically locked together by pre-set snaps and plates, completely eliminating the reliance on screwing operations inherent in traditional threaded connections. Structurally, it typically consists of two parts: a male connector with a locking component and a female connector with a positioning groove. The male connector's outer or inner circumference integrates an elastic snap-fit component, often made of high-toughness beryllium bronze or stainless steel. In its natural state, it is either convex outwards or retracted inwards, ready to engage. The end is designed with an inclined guide slope and a barb structure—the guide slope reduces insertion resistance during docking, while the barb prevents slippage after locking. The corresponding position on the female connector has a matching plate or groove. The plate is often a ring-shaped protrusion with chamfered edges, complementing the guide slope of the male connector's snap-fit. The groove is often a ring-shaped recess or an axially extending positioning groove, precisely accommodating the barb of the snap-fit. However, in practical applications, when the cable is forcibly pulled by external force, the existing internal snap-fit structure has obvious defects. The connection part cannot offset or disperse the tension, causing the tension to be directly concentrated on the snap-fit surface. Long-term stress will cause the snap-fit to wear more quickly, and may even cause the connection to loosen or be damaged, which seriously affects the signal transmission stability and service life of the cable assembly. Therefore, a threadless locking N-type cable assembly connection structure is proposed to address the above problems. Utility Model Content
[0003] The purpose of this invention is to provide an N-type cable assembly connection structure based on threadless locking, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A connection structure for an N-type cable assembly based on threadless locking includes a female connector and a male connector. The female connector is fitted with a male connector, and a tensile connection mechanism is fixed to the rear end of the male connector. A buffer mechanism is installed inside the tensile connection mechanism. The tensile connection mechanism includes a first connecting seat, a second connecting seat, and a third connecting seat. A first protective tube is hinged between the first and second connecting seats, and a second protective tube is hinged between the second and third connecting seats. The buffer mechanism includes a connecting rod and a guide seat. The connecting rod is fixedly disposed on the side of the third connecting seat near the first connecting seat, and the guide seat is fixedly disposed on the side of the first connecting seat near the third connecting seat. A spring is installed between the guide seat and the connecting rod. A limit seat is fixed to one end of the spring, and a limit pin is elastically connected to the inner side of the limit seat.
[0005] As a further optimization of this utility model, the guide seat includes a guide cylinder, one end of which is fixedly connected to a spherical seat, a rubber seat is fixed inside the spherical seat, a buffer groove is provided on the inner side of the rubber seat, and a guide rod slides in the middle of the inner side of the spherical seat.
[0006] As a further optimization of this utility model, the spring is fixedly connected to the guide cylinder, the spring is located outside the guide rod, the connecting rod and the limiting seat are slidably fitted, and the inner wall of the connecting rod is provided with limiting holes arranged in a linear pattern, the limiting holes being adapted to the limiting pins.
[0007] As a further optimization of this utility model, the axis of the rubber seat and the axis of the spherical seat are located on the same central axis, and the axis of the spherical seat and the axis of the guide rod are located on the same central axis.
[0008] As a further optimization of this utility model, the guide rod extends into the interior of the guide cylinder, one end of the guide rod slides with the inner side of the guide cylinder, the other end of the guide rod is fixedly connected to the connecting rod, the inner wall of the guide cylinder is provided with a circular array of vent holes, and the spherical seat is provided with a circular array of vent grooves on the side near the guide cylinder, the position of the vent grooves corresponding to the position of the vent holes.
[0009] As a further optimization of this utility model, the following features are provided: the second connector is located on one side of the first and third connectors; the first and third connectors are on the same axis; both corner areas on the outer side of the first protective tube are arc-shaped; the second protective tube has the same structure as the first protective tube; the first and second protective tubes are located on one side and the other side of the outer wall of the male connector, respectively; a connecting terminal is fixedly installed through the side of the second protective tube away from the first connector; a cable is installed between the first and second protective tubes; one end of the cable extends above the first connector, and the other end of the cable extends above the connecting terminal.
[0010] As a further optimization of this utility model, the inner wall of the female connector is fixed with a retaining plate, and the inner wall of the male connector is fixed with a buckle for adapting to the retaining plate, the buckle engaging with the retaining plate.
[0011] Compared with the prior art, the beneficial effects of this utility model are: In this utility model, an innovative design combines a tensile connection mechanism with a buffer mechanism for coordinated protection. When under tension, the symmetrical protective tubes disperse the tensile force through angle adjustment, and the springs absorb the tensile force through deformation. In case of overload, the limit pin disengages, and the guide rod squeezes the rubber seat buffer groove to achieve protection. With the help of a precise guide and air pressure balance structure, the tensile force is avoided from concentrating on the buckle throughout the process. There is no need for complex threads, which can effectively reduce the risk of buckle wear, ensure the connection stability and service life of the N-type cable assembly, and is suitable for frequent tension scenarios. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the combination of the tensile connection mechanism and the buffer mechanism of this utility model; Figure 3 This is a schematic diagram of the tensile connection mechanism of this utility model; Figure 4 This is an enlarged structural schematic diagram of the buffer mechanism of this utility model; Figure 5 This is an exploded view of the limiting seat of this utility model; Figure 6 This is a cross-sectional structural diagram of the guide cylinder of this utility model; Figure 7 This is a schematic diagram of the internal structure of the spherical seat of this utility model.
[0013] In the diagram: 1. Connector female head; 2. Connector male head; 3. Tensile connection mechanism; 31. First connecting seat; 32. Second connecting seat; 33. Third connecting seat; 34. First protective tube; 35. Second protective tube; 36. Connecting terminal; 37. Cable; 4. Buffer mechanism; 41. Connecting rod; 42. Guide seat; 421. Guide cylinder; 422. Ball seat; 423. Rubber seat; 424. Buffer groove; 425. Guide rod; 427. Vent hole; 428. Vent groove; 43. Spring; 44. Limit seat; 45. Limit pin; 46. Limit hole; 5. Buckle; 6. Clamping plate. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0016] Please see Figures 1-7 This utility model provides a technical solution: A connection structure for an N-type cable assembly based on threadless locking includes a female connector 1 and a male connector 2. The male connector 2 is installed at the connection end of the female connector 1. A tensile connection mechanism 3 is fixed at the rear end of the male connector 2. A buffer mechanism 4 is installed inside the tensile connection mechanism 3. The tensile connection mechanism 3 includes a first connecting seat 31, a second connecting seat 32, and a third connecting seat 33. A first protective tube 34 is hinged between the first connecting seat 31 and the second connecting seat 32. A second protective tube 35 is hinged between the second connecting seat 32 and the third connecting seat 33. The buffer mechanism 4 includes a connecting rod 41 and a guide seat 42. The connecting rod 41 is fixedly disposed on the side of the third connecting seat 33 near the first connecting seat 31. The guide seat 42 is fixedly disposed on the side of the first connecting seat 31 near the third connecting seat 33. A spring 43 is installed between the guide seat 42 and the connecting rod 41. A limit seat 44 is fixedly fixed at one end of the spring 43. A limit pin 45 is elastically connected to the inner side of the limit seat 44.
[0017] Specifically, the first protective tube 34 and the second protective tube 35, which are hinged by the tensile connection mechanism 3, can adjust their angles to disperse the tensile force according to the tensile force. The spring 43 of the buffer mechanism 4 can initially absorb the tensile force by deformation. The limit seat 44 and the limit pin 45 cooperate to achieve limit and overload protection. As a further implementation of this solution, the guide seat 42 includes a guide cylinder 421, a spherical seat 422 is fixedly fixed at one end of the guide cylinder 421, a rubber seat 423 is fixed inside the spherical seat 422, a buffer groove 424 is provided on the inner side of the rubber seat 423, and a guide rod 425 slides in the middle of the inner side of the spherical seat 422. Specifically, the rubber seat 423 and buffer groove 424 of the guide seat 42 can further buffer under extreme tensile force without the need for a complex thread structure. Even if the cable is forcibly pulled, the tensile force can be dispersed through multi-stage buffering to avoid the tensile force being concentrated on the buckle, greatly reducing the risk of buckle wear and damage, and ensuring the stability and service life of the N-type cable assembly connection. As a further implementation of this solution, the spring 43 is fixedly connected to the guide cylinder 421. The spring 43 is located outside the guide rod 425. The connecting rod 41 and the limiting seat 44 are slidably fitted. The inner wall of the connecting rod 41 is provided with limiting holes 46 arranged in a linear pattern. The limiting holes 46 are adapted to the limiting pins 45. Specifically, through the sliding fit between the connecting rod 41 and the limiting seat 44, and the design of the limiting hole 46 and the limiting pin 45, graded buffering and overload protection are achieved, solving the problems of traditional structures having no overload protection and the buckles being easily damaged by extreme tensile force. As a further implementation of this solution, the axis of the rubber seat 423 and the axis of the spherical seat 422 are located on the same central axis, and the axis of the spherical seat 422 and the axis of the guide rod 425 are located on the same central axis. Specifically, when the guide rod 425 is stretched, it can slide precisely along the axis to the rubber seat 423. The rubber seat 423 can evenly bear the impact force of the guide rod 425, and the buffer groove 424 can also disperse the impact force more efficiently. As a further implementation of this solution, the guide rod 425 extends into the interior of the guide cylinder 421. One end of the guide rod 425 is slidably engaged with the inner side of the guide cylinder 421, and the other end of the guide rod 425 is fixedly connected to the connecting rod 41. The inner wall of the guide cylinder 421 is provided with a circular array of vent holes 427. The spherical seat 422 is provided with a circular array of vent grooves 428 on the side near the guide cylinder 421. The position of the vent grooves 428 corresponds to the position of the vent holes 427. Specifically, the vent 427 and the vent groove 428 work together to balance the air pressure in the guide cylinder 421 and the spherical seat 422, so as to avoid the guide rod 425 from being blocked due to the air pressure difference when it slides. As a further implementation of this solution, the second connector 32 is located on one side of the first connector 31 and the third connector 33. The first connector 31 and the third connector 33 are located on the same axis. The two corner areas on the outer side of the first protective tube 34 are arc-shaped. The second protective tube 35 has the same structure as the first protective tube 34. The first protective tube 34 and the second protective tube 35 are located on one side and the other side of the outer wall of the connector male head 2, respectively. A connecting terminal 36 is fixed through the side of the second protective tube 35 away from the first connector 31. A cable 37 is installed between the first protective tube 34 and the second protective tube 35. One end of the cable 37 extends to the top of the first connector 31, and the other end of the cable 37 extends to the top of the connecting terminal 36. Specifically, when under tension, the angle adjustment of the first protective tube 34 and the second protective tube 35 can drive the cable 37 to adapt and adjust its posture, avoiding damage to the cable 37 due to excessive bending or pulling, thus ensuring the reliability of signal transmission and further assisting in dispersing the tension. As a further implementation of this solution, a retaining plate 6 is fixed to the inner wall of the female connector 1, and a buckle 5 for adapting the retaining plate 6 is fixed to the inner wall of the male connector 2. The buckle 5 is engaged with the retaining plate 6. Specifically, under the protection of the tensile connection mechanism 3 and the buffer mechanism 4, when the cable is under tension, the connection between the buckle 5 and the plate 6 will not easily wear or come off due to the concentration of tension, ensuring the stability of the basic connection of the N-type cable assembly, providing a reliable path for signal transmission, and also allowing the subsequent tension distribution and buffering design to play a role based on the stable buckle connection.
[0018] Workflow: During the connection preparation and internal locking stage, the female connector 1 and male connector 2 are separated. In the tensile connection mechanism 3, the first connecting seat 31, the second connecting seat 32, and the third connecting seat 33 are initially arranged. The first protective tube 34 and the second protective tube 35 maintain a certain tilt angle. The internal cable 37 is naturally extended. The spring 43 of the buffer mechanism 4 is in a naturally extended state. The limiting pin 45 of the limiting seat 44 is engaged in the limiting hole 46 of the connecting rod 41. The guide rod 425 is located inside the ball seat 422 and the guide cylinder 421, and is not connected to the rubber seat 423. Contact, the vent 427 and the vent groove 428 are kept unobstructed. The operator does not need to use the threaded structure. He only needs to align the male connector 2 with the connecting end of the female connector 1 and rotate the male connector 2 so that the buckle 5 on the inner wall of the male connector 2 rotates and snaps into the buckle 6 on the inner wall of the female connector 1, thus completing the threadless internal locking of the two. At the same time, the male connector 2 is electrically connected to the connecting terminal 36 through the cable 37 reserved in the first protective tube 34 and the second protective tube 35. The connecting terminal 36 is then connected to the external cable assembly to build a complete signal transmission path. During the tensile action and multi-stage buffering phase, when the external cable assembly is forcibly pulled, the tensile force is transmitted through the cable to the connecting terminal 36. The connecting terminal 36 is fixed to the third connecting seat 33, which in turn drives the third connecting seat 33 to move away from the first connecting seat 31. The third connecting seat 33 pulls the second protective tube 35, and the second protective tube 35 rotates around the hinge point with the second connecting seat 32. At the same time, the second connecting seat 32 drives the first protective tube 34 to rotate around the hinge point with the first connecting seat 31, so that the tilt angle between the first protective tube 34 and the second protective tube 35 gradually decreases. Through posture adjustment, the tensile force is initially dispersed, and the internal cable 37 changes with the angle of the protective tube. The adaptive adjustment of posture avoids excessive pulling. As the third connecting seat 33 moves, it drives the connecting rod 41 to move synchronously. The connecting rod 41 pulls the limiting seat 44, causing the limiting seat 44 to stretch the spring 43. The spring 43 absorbs part of the tension by its own elastic deformation, thus achieving buffering. During this process, the connecting rod 41 drives the guide rod 425 to slide within the spherical seat 422 and the guide cylinder 421. The cooperation between the guide cylinder 421 and the guide rod 425 provides precise guidance for the movement of the connecting rod 41. The vent hole 427 and the vent groove 428 balance the air pressure inside the guide cylinder 421, ensuring that the guide rod 425 slides smoothly and avoiding the impact of air pressure on the buffering effect. During the ultimate tensile force and overload protection stage, when the tensile force continues to increase, the deformation of the spring 43 reaches its limit. When the tensile force exceeds the locking force of the limit pin 45 and the limit hole 46, the limit pin 45 disengages from the limit hole 46 of the connecting rod 41, the limit between the limit seat 44 and the connecting rod 41 is released, and the connecting rod 41 drives the guide rod 425 to continue sliding into the ball seat 422 until the end of the guide rod 425 is tightly fitted with the rubber seat 423. The rubber seat 423 is elastic, and its inner buffer groove 424 provides buffer space for the guide rod 425. Through the deformation of the rubber seat 423 and the structural characteristics of the buffer groove 424, the impact force generated by the ultimate tensile force is further absorbed and dispersed to achieve protection and prevent the tensile force from being directly transmitted to the inner snap-fit parts of the connector female head 1 and the connector male head 2, effectively preventing the snap-fit from wear or damage due to concentrated force. During the stage of tension disappearance and component reset, after the external tension disappears, the spring 43 releases its elastic potential energy, pulling the limiting seat 44 to move closer to the guide seat 42. The limiting seat 44 drives the connecting rod 41 and the guide rod 425 to slide and reset in the opposite direction. As the relative position of the limiting seat 44 and the connecting rod 41 is restored, the limiting pin 45 is re-engaged into the corresponding limiting hole 46 under the elastic action, realizing the re-limiting of the limiting seat 44 and the connecting rod 41. The buffer mechanism 4 returns to the initial ready-to-work state. Under the tension of its own structure and the pulling action of the cable 37, the first protective tube 34 and the second protective tube 35 gradually return to the initial tilt angle. The first connecting seat 31, the second connecting seat 32 and the third connecting seat 33 return to the initial arrangement. The internal snap-fit connection of the connector female head 1 and the connector male head 2 remains stable under the cooperation of the buckle 5 and the clamping plate 6. The entire device completes the reset and can cope with the next tension action.
[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A connection structure for an N-type cable assembly based on threadless locking, comprising a female connector (1) and a male connector (2), characterized in that: The connector female head (1) is equipped with a connector male head (2) at the connection end, and a tensile connection mechanism (3) is fixed at the rear end of the connector male head (2). A buffer mechanism (4) is installed on the inner side of the tensile connection mechanism (3). The tensile connection mechanism (3) includes a first connecting seat (31), a second connecting seat (32) and a third connecting seat (33). A first protective tube (34) is hinged between the first connecting seat (31) and the second connecting seat (32). A second protective tube (35) is hinged between the second connecting seat (32) and the third connecting seat (33). The buffer mechanism (4) includes a connecting rod (41) and a guide seat (42). The connecting rod (41) is fixedly disposed on the side of the third connecting seat (33) close to the first connecting seat (31). The guide seat (42) is fixedly disposed on the side of the first connecting seat (31) close to the third connecting seat (33). A spring (43) is installed between the guide seat (42) and the connecting rod (41). One end of the spring (43) is fixed with a limit seat (44). A limit pin (45) is elastically connected to the inner side of the limit seat (44).
2. The N-type cable assembly connection structure based on threadless locking according to claim 1, characterized in that: The guide seat (42) includes a guide cylinder (421), one end of which is fixed with a spherical seat (422), and a rubber seat (423) is fixed inside the spherical seat (422). A buffer groove (424) is provided on the inner side of the rubber seat (423), and a guide rod (425) slides on the middle of the inner side of the spherical seat (422).
3. The N-type cable assembly connection structure based on threadless locking according to claim 1, characterized in that: The spring (43) is fixedly connected to the guide cylinder (421). The spring (43) is located outside the guide rod (425). The connecting rod (41) and the limiting seat (44) are slidably engaged. The inner wall of the connecting rod (41) is provided with limiting holes (46) arranged in a linear pattern. The limiting holes (46) are adapted to the limiting pins (45).
4. The N-type cable assembly connection structure based on threadless locking according to claim 2, characterized in that: The axis of the rubber seat (423) and the axis of the spherical seat (422) are located on the same central axis, and the axis of the spherical seat (422) and the axis of the guide rod (425) are located on the same central axis.
5. The N-type cable assembly connection structure based on threadless locking according to claim 2, characterized in that: The guide rod (425) extends into the interior of the guide cylinder (421). One end of the guide rod (425) is slidably engaged with the inner side of the guide cylinder (421), and the other end of the guide rod (425) is fixedly connected to the connecting rod (41). The inner wall of the guide cylinder (421) is provided with a circular array of vent holes (427). The spherical seat (422) is provided with a circular array of vent grooves (428) on the side near the guide cylinder (421). The position of the vent grooves (428) corresponds to the position of the vent holes (427).
6. The N-type cable assembly connection structure based on threadless locking according to claim 1, characterized in that: The second connector (32) is located on one side of the first connector (31) and the third connector (33). The first connector (31) and the third connector (33) are on the same axis. The two corner areas on the outside of the first protective tube (34) are arc-shaped. The second protective tube (35) has the same structure as the first protective tube (34). The first protective tube (34) and the second protective tube (35) are located on one side and the other side of the outer wall of the male connector (2), respectively. A connecting terminal (36) is fixed through the side of the second protective tube (35) away from the first connector (31). A cable (37) is installed between the first protective tube (34) and the second protective tube (35). One end of the cable (37) extends to the top of the first connector (31), and the other end of the cable (37) extends to the top of the connecting terminal (36).
7. The N-type cable assembly connection structure based on threadless locking according to claim 1, characterized in that: The inner wall of the female connector (1) is fixed with a retaining plate (6), and the inner wall of the male connector (2) is fixed with a buckle (5) for adapting the retaining plate (6), and the buckle (5) engages with the retaining plate (6).