A small self-locking coaxial connector assembly

Abstract

This utility model discloses a small self-locking coaxial connector assembly, including a male connector and a female connector. The male connector includes a connector and a first pair of inserts with grooves; the female connector includes a second pair of inserts with protrusions and limiting platforms, and an axially movable locking cylinder. The locking cylinder has a thin-walled portion, an inner boss, and a covering portion. An elastic element is provided on the inner side of the thin-walled portion between the limiting platform and the inner boss. During connection, the protrusion is embedded in the groove to form a snap-fit ​​structure. Under the action of the elastic element, the locking cylinder causes the inner boss to abut against the outer periphery of the protrusion from all sides to form a self-locking mechanism, effectively preventing the snap-fit ​​structure from disengaging under external vibration and significantly improving the vibration resistance level. At the same time, the covering portion covers the connection between the connector and the first pair of inserts, making the male and female connectors form an integral structure, further enhancing the connection reliability. The overall structure is compact, self-locking reliable, and has high vibration resistance. It can be easily inserted into small-diameter mounting holes and is suitable for high-density installation scenarios.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, specifically to a small self-locking coaxial connector assembly. Background Technology

[0002] As electronic devices trend towards miniaturization and integration, miniaturization of coaxial connectors has become a mainstream market trend. However, in the field of robotics, especially in camera modules at hand and head joints, the internal space is extremely compact. The diameter of the motor hole used for cable routing is structurally limited, with the smallest motor hole diameter currently available on the market being only 6mm. Existing coaxial connector solutions often use FAKRA connectors, but due to their shell structure and locking mechanism, their overall size is relatively large, typically preventing them from directly passing through the 6mm motor hole. In actual assembly, the cable must first be threaded through the motor hole, and then the connector is assembled to the cable end after it has been pulled out. This method of threading the cable first and then assembling it introduces many difficulties in assembly, testing, and maintenance, resulting in high defect rates, high costs, and difficulty in maintenance. In addition, traditional small coaxial connectors mostly use snap-fit ​​or threaded connections, which have problems such as low vibration resistance and susceptibility to detachment due to external forces after mating. Their locking structures are often quite complex, which is not conducive to miniaturization design, and they are prone to wear and tear after frequent mating and unmating, leading to self-locking failure. Therefore, there is an urgent need to develop a compact, self-locking coaxial connector assembly that can pass entirely through a 6mm diameter motor hole, and has reliable self-locking and excellent vibration resistance. Utility Model Content

[0003] This utility model provides a small self-locking coaxial connector assembly, overcoming the problems in the prior art mentioned above. The technical solution adopted by this utility model is as follows:

[0004] A miniature self-locking coaxial connector assembly includes:

[0005] A male connector, including a connector and a first pair of inserts with grooves on their outer peripheral surfaces;

[0006] The female connector includes a second pair of plugs with a limiting platform, and the second pair of plugs has a protrusion inside one end of the plug-in port;

[0007] The male connector is coaxially connected to the female connector, and the groove of the first pair of plugs matches the protrusion of the second pair of plugs.

[0008] The second pair of plugs is also fitted with an axially movable locking cylinder, which has an integrally formed thin-walled part, an inner boss arranged circumferentially on the inner wall, and a covering part extending along the direction of the plug-in.

[0009] The inner side of the thin-walled portion of the locking cylinder is provided with an elastic element, and the elastic element is located between the limiting platform and the inner boss. When the female connector is connected to the male connector, the protrusion is embedded in the groove to form a snap-fit ​​structure, and the inner boss abuts against the outer periphery of the protrusion from all sides to form a self-locking structure. At the same time, the covering portion covers the connection between the connector and the first pair of plugs, so that the male connector and the female connector form a stable locking connection structure.

[0010] Furthermore, the maximum outer diameter of the female connector is less than 6 mm; wherein, the maximum outer diameter is the maximum radial dimension of the entire female connector including the locking cylinder.

[0011] Furthermore, the covering portion is a thick-walled structure that extends integrally from the inner boss in the insertion direction.

[0012] Furthermore, the rear end of the lock cylinder forms a tapered opening, which forms an axial limit with the limiting platform.

[0013] Furthermore, the second pair of plugs has a claw-shaped connector, including multiple claws, with gaps between adjacent claws, and the protrusion is located on the inner side of each claw.

[0014] Furthermore, the protrusion is provided with a first inclined surface, and the groove is provided with a second inclined surface that cooperates with the first inclined surface.

[0015] Furthermore, the male connector is provided with a first insulator inside, the first pair of plugs is sleeved on the outside of the first insulator, the first pair of plugs forms an axially outwardly expanding first step portion at the end away from the plug, the first insulator has a second step portion, and the first step portion and the second step portion limit each other.

[0016] Furthermore, the tail of the first insulator protrudes from the tail of the first pair of plugs. The connector has crimping portions at positions corresponding to the tail of the first insulator and at positions corresponding to the tail of the first pair of plugs. The connector also has a constricted portion at its port, which is fixed to the outside of the first step portion, thereby achieving mutual fixation between the connector, the first pair of plugs, and the first insulator.

[0017] Furthermore, the female connector also includes a second insulator sleeved within the second pair of plugs, and the inner wall of the second pair of plugs is provided with a first barb for locking the second insulator.

[0018] Furthermore, a first center pin is fixed inside the first insulator, and a second center pin is fixed inside the second insulator. When the male connector is connected to the female connector, the first center pin and the second center pin are connected.

[0019] Compared with existing technologies, the advantages of the small self-locking coaxial connector assembly provided by this utility model are as follows: the self-locking is formed by the cooperation of the locking cylinder and the elastic element, which effectively prevents the snap-fit ​​structure from disengaging under external vibration, and significantly improves the vibration resistance level; the extended covering part completely covers the connection between the male connector and the first pair of plugs, so that the male and female ends form a stable locking connection structure after locking, which enhances the connection reliability; in addition, the overall structure of the assembly is compact and can be easily inserted into the smallest diameter motor hole currently on the market, making it suitable for confined spaces and high-density installation scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first-person perspective schematic diagram of the overall structure of the female connector in this application.

[0022] Figure 2 This is a second-view schematic diagram of the overall structure of the female connector in this application;

[0023] Figure 3 This is a cross-sectional view of the female connector of this application;

[0024] Figure 4 This is a schematic diagram of the overall structure of the male connector in this application;

[0025] Figure 5 This is a cross-sectional view of the public connector of this application;

[0026] Figure 6 This is a schematic diagram of the self-locking state of the connector assembly after connection in this application;

[0027] Figure 7 This is a cross-sectional view of the connector assembly in its self-locking state after connection.

[0028] Figure 8 A cross-sectional view of the connector assembly in the unlocked state of this application.

[0029] The components represented by each number in the attached diagram are explained below:

[0030] 100 - Male connector, 101 - First pair of plugs, 1011 - Groove, 1012 - First step, 1013 - First bevel, 102 - First insulator, 1021 - Second step, 103 - Connector, 1031 - Crimping part, 1032 - Narrowing part, 104 - First center pin;

[0031] 200-Female connector, 201-Second pair of plugs, 2011-Limiting stage, 2012-Protrusion, 2013-Second bevel, 2014-Claw structure, 2015-First barb, 2016-Gap, 202-Locking cylinder, 2021-Thin wall section, 2022-Inner boss, 2023-Covering section, 2024-Closing section, 2025-Elastic element, 2026-Protruding ridge, 203-Second insulator, 204-Second center pin.

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0034] refer to Figures 1 to 7 This utility model provides a small self-locking coaxial connector assembly, including: a male connector 100, including a connector 103 and a first pair of plugs 101 with a groove 1011 on their outer peripheral surface; a female connector 200, including a second pair of plugs 201 with a limiting platform 2011, and a protrusion 2012 inside one end of the insertion port of the second pair of plugs 201; the male connector 100 and the female connector 200 are coaxially connected, and the groove 1011 of the first pair of plugs 101 and the second pair of plugs 201 are connected... The claw-shaped connectors of the first pair of plugs are matched, and the protrusion 2012 is embedded in the groove 1011 to form a snap-fit ​​structure; the second pair of plugs 201 is also fitted with an axially movable locking cylinder 202. The locking cylinder 202 has an integrally formed thin-walled part 2021, an inner boss 2022 circumferentially provided on the inner wall, and an extended covering part 2023 extending along the direction of the plug; an elastic member 2025 is provided on the inner side of the thin-walled part 2021 of the locking cylinder 202, and the elastic member 2025 is located between the limiting platform 2011 and the inner boss 2022.

[0035] refer to Figure 6 and Figure 7When the female connector 200 is connected to the male connector 100, an external force moves the locking cylinder 202 axially backward. After the protrusion 2012 is embedded in the groove 1011 to form a snap-fit ​​structure, the locking cylinder 202 is released. Without applying external force alone, the locking cylinder 202 is axially reset under the action of the elastic element 2025 of the connector assembly itself, so that the inner boss 2022 abuts against the outer periphery of the protrusion 2012 from all sides, forming a self-locking structure. At the same time, the covering part 2023 can cover the connection between the connector 103 and the first pair of plugs 101, so that the male connector 100 and the female connector 200 form a stable locking connection structure.

[0036] The self-locking structure provided in this application enables blind mating and self-locking of the connector assembly, effectively preventing the snap-fit ​​structure from disengaging under external vibration and significantly improving the vibration resistance level. The locking cylinder 202 adds a covering part 2023, so that the main connection between the female connector 200 and the male connector 100 is covered in the locking cylinder 202 to form a stable and locked integral structure, further enhancing the stability of the connector. Moreover, the overall structure of the connector assembly is compact, which is conducive to miniaturization design and can meet the needs of high-density installation scenarios.

[0037] refer to Figures 1 to 3 The maximum outer diameter D1 of the female connector 200 is less than 6 mm. In this embodiment, the maximum diameter D1 of the female connector 200 is 5.8 mm. The maximum diameter D1 refers to the maximum radial dimension of the female connector 200 including the locking cylinder 202. At the same time, the maximum diameter D2 of the male connector 100 including the connector 103 is less than or equal to 4 mm. The maximum diameter D2 refers to the maximum radial dimension of the male connector 100.

[0038] The miniature self-locking coaxial connector assembly provided in this embodiment has a maximum outer diameter of 5.8mm, allowing it to be easily inserted into motor holes with a minimum diameter of 6mm currently available on the market, thus meeting the installation requirements in confined spaces. This invention is particularly suitable for scenarios where the internal space of a robot's hand and head is compact, and can be used for electrical connections of camera modules at hand or head joints. Furthermore, this assembly also ensures connection reliability under high vibration environments.

[0039] The elastic element 2025 can specifically be a spring, the free length of which is greater than the maximum distance between the inner boss 2022 and the limiting platform 2011 during the axial back-and-forth movement of the locking cylinder 202. This ensures that the locking cylinder 202 is always subjected to a restoring force in the insertion direction.

[0040] In this embodiment, the covering portion 2023 is a thick-walled structure extending from the inner boss 2022 in the insertion direction. The wall thickness of the thick-walled structure is greater than that of the thin-walled portion 2021. When the male connector 100 and the female connector 200 are fully inserted, the front end of the covering portion 2023 extends axially to the rear of the connection between the connector 103 and the first pair of plugs 101.

[0041] In this embodiment, the rear end of the lock cylinder 202 has a tapered opening 2024, which forms an axial limit with the limiting platform 2011 to prevent the lock cylinder 202 from coming out. The lock cylinder 202 has a protruding ridge 2026 on its exterior to facilitate unlocking operations.

[0042] refer to Figure 7 The second pair of plugs 201 has a claw-shaped insertion port 2014, preferably six claws in this embodiment. A protrusion 2012 is provided on the inner side of each claw, and a gap 2016 is provided between adjacent claws. The six claws are centrally symmetrically distributed. The claw-shaped structure 2014 is elastic and can expand or contract radially during insertion and removal.

[0043] Furthermore, the protrusion 2012 is provided with a first inclined surface 1013, and the groove 1011 is provided with a second inclined surface 2013 that cooperates with the first inclined surface 1013.

[0044] refer to Figure 8 When unlocking is required, the operator pulls the locking cylinder 202 backward (away from the insertion direction) to move the inner boss 2022 away from the outer periphery of the protrusion 2012. Then, an axial pulling force is applied, and the first inclined surface 1013 and the second inclined surface 2013 slide relative to each other, so that the protrusion 2012 can be smoothly disengaged from the groove 1011, and the connector can be separated.

[0045] refer to Figure 4 and Figure 5 In this embodiment, the male connector 100 is further provided with a first insulator 102 inside, and a first pair of plugs 101 are sleeved on the outside of the first insulator 102. The first pair of plugs 101 has an axially outwardly expanding first step portion 1012 at the end away from the insertion end, and the first insulator 102 has a second step portion 1021. The first step portion 1012 and the second step portion 1021 limit each other to prevent the first insulator 102 from coming out forward along the insertion direction and to prevent the first pair of plugs 101 from shifting backward.

[0046] In this embodiment, the tail of the first insulator 102 protrudes from the tail of the first pair of plugs 101. The connector 103 is provided with crimping portions 1031 at positions corresponding to the tail of the first insulator 102 and at positions corresponding to the tail of the first pair of plugs 101. The connector 103 has a constricted portion 1032 at its port. The constricted portion 1032 is fixed to the outside of the first stepped portion 1012, thereby fixing the connector 103, the first pair of plugs 101 and the first insulator 102 to each other.

[0047] Refer again Figures 1 to 3 In this embodiment, the female connector 200 further includes a second insulator 203 sleeved inside the second pair of plugs 201. The inner wall of the second pair of plugs 201 is provided with a first barb 2015 to fix the second insulator 203.

[0048] In this embodiment, a first center pin 104 is fixed inside the first insulator 102, and a second center pin 204 is fixed inside the second insulator 203. When the male connector 100 is connected to the female connector 200, the first center pin 104 and the second center pin 204 are connected. Each center pin is fixed inside the first insulator 102 and the second insulator 203 respectively by the second barb.

[0049] The first insulator 102 has a cylindrical recess, and the second insulator 203 has an annular protrusion that matches the cylindrical recess. The two work together to increase the creepage distance of the RF coaxial connector, thereby improving the stability and reliability of the RF coaxial connector. They also prevent short circuits that occur when the pins are electrically connected, making the connector assembly less likely to be damaged when powered on.

[0050] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. The terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "flat," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and 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.

[0051] The above embodiments are preferred embodiments of this utility model, but not all embodiments. Any equivalent changes to the technical solutions of this utility model made by those skilled in the art after reading this utility model specification are covered by this utility model application.

Claims

1. A small self-locking coaxial connector assembly, characterized in that, include: A male connector, including a connector and a first pair of inserts with grooves on their outer peripheral surfaces; The female connector includes a second pair of plugs with a limiting platform, and the second pair of plugs has a protrusion inside one end of the plug-in port; The male connector is coaxially connected to the female connector, and the groove of the first pair of plugs matches the protrusion of the second pair of plugs. The second pair of plugs is also fitted with an axially movable locking cylinder, which has an integrally formed thin-walled part, an inner boss arranged circumferentially on the inner wall, and a covering part extending along the direction of the plug-in. The inner side of the thin-walled portion of the locking cylinder is provided with an elastic element, and the elastic element is located between the limiting platform and the inner boss. When the female connector is connected to the male connector, the protrusion is embedded in the groove to form a snap-fit ​​structure, and the inner boss abuts against the outer periphery of the protrusion from all sides to form a self-locking structure. At the same time, the covering portion covers the connection between the connector and the first pair of plugs, so that the male connector and the female connector form a stable locking connection structure.

2. The miniature self-locking coaxial connector assembly according to claim 1, characterized in that, The maximum outer diameter of the female connector is less than 6 mm; wherein, the maximum outer diameter is the maximum radial dimension of the entire female connector including the locking cylinder.

3. The miniature self-locking coaxial connector assembly according to claim 1, characterized in that, The covering part is a thick-walled structure that extends integrally from the inner boss in the insertion direction.

4. The miniature self-locking coaxial connector assembly according to claim 1, characterized in that, The rear end of the lock cylinder forms a tapered opening, which axially limits the movement of the locking platform.

5. The miniature self-locking coaxial connector assembly according to claim 1, characterized in that, The second pair of plugs has a claw-shaped connector, including multiple claws, with gaps between adjacent claws, and the protrusion is located on the inner side of each claw.

6. The miniature self-locking coaxial connector assembly according to claim 1, characterized in that, The protrusion is provided with a first inclined surface, and the groove is provided with a second inclined surface that cooperates with the first inclined surface.

7. The miniature self-locking coaxial connector assembly according to any one of claims 1 to 6, characterized in that, The male connector is further provided with a first insulator. The first pair of plugs is sleeved on the outside of the first insulator. The first pair of plugs forms an axially outwardly expanding first step at the end away from the plug. The first insulator has a second step, and the first step and the second step limit each other.

8. The miniature self-locking coaxial connector assembly according to claim 7, characterized in that, The tail of the first insulator protrudes from the tail of the first pair of plugs. The connector has crimping portions at positions corresponding to the tail of the first insulator and at positions corresponding to the tail of the first pair of plugs. The connector also has a constricted portion at its port. The constricted portion is fixed to the outside of the first step portion, thereby achieving mutual fixation between the connector, the first pair of plugs, and the first insulator.

9. The miniature self-locking coaxial connector assembly according to claim 8, characterized in that, The female connector also includes a second insulator sleeved within the second pair of plugs, and the inner wall of the second pair of plugs is provided with a first barb for locking the second insulator.

10. The miniature self-locking coaxial connector assembly according to claim 9, characterized in that, A first center pin is fixed inside the first insulator, and a second center pin is fixed inside the second insulator. When the male connector is connected to the female connector, the first center pin and the second center pin are connected.

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