Anti-pressure connector

Abstract

The invention discloses an anti-pressure connector, and belongs to the technical field of connectors, the anti-pressure connector comprises a hole seat, a needle seat, a locking plate, a fixing mechanism, an elastic arm, a lock catch matching part, copper needles and a terminal, a plurality of copper needles are inserted into one end of the needle seat, the hole seat is inserted into the other end of the needle seat, the hole seat is connected with the needle seat through the fixing mechanism, the terminal is inserted into the hole seat, and the elastic arm is connected with the lock catch matching part. One end of the terminal abuts against the inner wall of the hole seat, the locking plate is inserted in the hole seat and abuts against the other end of the terminal, the terminal is fixed in the hole seat through the locking plate, the fixing mechanism comprises an elastic arm and a lock catch matching part, the elastic arm is arranged in an inner cavity of the hole seat or the needle seat, and the lock catch matching part is arranged on the hole seat or the needle seat without the elastic arm. The problem that in the prior art, an elastic arm is exposed and prone to damage, and consequently a lock catch loses efficacy is solved. The elastic arm is protected by adopting the design of fully wrapping the inner cavity or introducing the slidable locking plate, so that the reliability, the service life and the use convenience of the connector are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a pressure-proof connector. Background Art

[0002] In the widely used internal locking connectors, the core of the locking mechanism (the spring arm) is typically designed and placed directly at the end of the socket body. This layout leaves the spring arm completely exposed to the external environment, lacking any physical barriers or protection. In compact, multi-device, or dynamically changing application scenarios, such as cabinet interiors, mobile device interfaces, and industrial production lines, this exposed state makes the spring arm an easy target for unexpected stress points.

[0003] When the elastic arm is unprotected and subjected to lateral compression or direct impact from accidental collisions with adjacent cables, other equipment components, operating tools, etc., its precisely designed structure is susceptible to irreversible plastic deformation or displacement. This physical damage directly causes the locking mechanism between the elastic arm and the needle holder end to fail, and the locking force is instantly weakened or completely lost. The direct consequence is the unexpected loosening of the connection between the socket and the needle holder, forced interruption of signal transmission or power supply, resulting in device malfunction, system downtime, and even potential safety hazards.

[0004] Therefore, how to provide a connector so that the connection between its elastic arm and the locking structure is stable and prevent the connection between the hole seat and the needle seat from loosening, thereby causing signal transmission interruption, is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the Invention

[0005] To this end, the present invention provides a pressure-proof connector to solve the problem in the prior art that the elastic arm is in an unprotected state, resulting in irreversible deformation of the structure after an accidental collision, thereby causing the engagement between the elastic arm and the needle seat end locking structure to fail.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention discloses a pressure-proof connector, comprising:

[0008] A needle holder, one end of which is provided with a number of copper needles;

[0009] A hole seat is inserted into the other end of the needle seat, and the hole seat and the needle seat are connected by a fixing mechanism;

[0010] A terminal is inserted into the hole seat, and one end of the terminal abuts against the inner wall of the hole seat;

[0011] A locking piece is inserted into the hole seat and abuts against the other end of the terminal, and the terminal is fixed in the hole seat by the locking piece;

[0012] The fixing mechanism includes an elastic arm and a lock fitting portion, wherein the elastic arm is arranged in the hole seat or the inner cavity of the needle seat, and the lock fitting portion is arranged on the hole seat or the needle seat where the elastic arm is not installed.

[0013] In a possible implementation, the fixing mechanism includes at least a first use state, and in the first use state, the needle seat is a fully enclosed structure having a needle seat inner cavity;

[0014] The elastic arm is integrally formed in the inner cavity of the needle seat;

[0015] The lock fitting portion is integrally formed on the outer wall of the hole seat;

[0016] When the hole seat is inserted into the needle seat, the lock fitting portion enters the inner cavity of the needle seat and cooperates with the elastic arm to form a lock, and the full-enclosed structure of the needle seat is formed with a needle seat covering wall, which surrounds the outside of the elastic arm.

[0017] In a possible implementation, the free end of the elastic arm extends toward the insertion inlet of the needle seat, and the free end of the elastic arm is a hook-shaped block.

[0018] In a possible implementation, the locking engaging portion is a limiting frame with an arched structure, and the limiting frame is locked and engaged with the hook-shaped block;

[0019] The needle seat covering wall includes a wall body of the needle seat covering the top and side surfaces of the elastic arm.

[0020] In a possible implementation, the fixing mechanism further includes a second use state, and in the second use state, the hole seat is a fully enclosed structure having a hole seat inner cavity, and a slot is provided on an outer wall on one side of the hole seat inner cavity in the plugging direction;

[0021] The elastic arm is integrally formed in the inner cavity of the hole seat;

[0022] The locking fitting portion is integrally formed on the inner wall of the needle seat;

[0023] When the hole seat is inserted into the needle seat, the lock fitting portion passes through the slot into the inner cavity of the hole seat and cooperates with the elastic arm to form a lock. The full-enclosed structure of the hole seat is formed with a hole seat covering wall, which surrounds the outside of the elastic arm.

[0024] In one possible implementation, the locking fitting portion is a needle seat rib, which includes an extension plate and a limiting groove. One end of the extension plate is integrally formed on the inner wall of the needle seat, and the other end of the extension plate is provided with the limiting groove.

[0025] In a possible implementation, a first limiting block is provided at the free end of the elastic arm, and the first limiting block cooperates with the limiting groove to form a lock buckle;

[0026] The hole seat covering wall includes a wall body of the hole seat covering the top and side surfaces of the elastic arm.

[0027] In a possible implementation, the hole seat is provided with protrusions, which are provided in pairs and are integrally formed on both side outer walls of the hole seat;

[0028] The locking piece includes a locking piece body and a limiting piece. The locking piece body is inserted into the hole seat. The limiting pieces arranged in pairs are integrally formed on the outer walls of both sides of the locking piece body. The limiting pieces are engaged and connected with the protrusions.

[0029] In a possible implementation, the fixing mechanism further includes a third use state, and in the third use state, the lock engaging portion is a limiting hole provided on the outer wall of the needle seat, a rib is provided below the limiting hole, and both ends of the rib are integrally formed on the inner wall of the needle seat;

[0030] The elastic arm is mounted on the outer wall of the hole seat, and a gap is provided between the free end of the elastic arm and the outer wall of the hole seat;

[0031] A pair of slide grooves are provided on both sides of the gap, and the slide grooves are opened on the hole seat;

[0032] A groove is formed on the outer wall of the elastic arm, and a second limiting block is integrally formed on the elastic arm.

[0033] In a possible implementation, the locking piece further includes:

[0034] A connecting arm, one end of which is mounted on the top of the locking plate body, and the other end of which is mounted with an anti-pressure arm, the anti-pressure arm being slidably connected in the sliding groove and resting under the elastic arm;

[0035] The baffle has a front end integrally formed on the outer wall of the anti-pressure arm.

[0036] The present invention has the following advantages: by adopting different structural designs, no matter whether the elastic arm is arranged at the needle seat end or the hole seat end, the elastic arm of the core locking element is completely protected, and a physical barrier is formed by the rigid covering wall, thereby avoiding direct squeezing or impact of external objects on the elastic arm, fundamentally eliminating the risk of loosening of the lock and failure of the connector due to the collapse of the elastic arm under force, and significantly improving the mechanical stability, lock reliability and overall service life of the connector in complex use environments (such as industrial or vehicle-mounted scenarios with mechanical stress, vibration, and accidental collisions). BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0038] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0039] Figure 1 A three-dimensional diagram of the normal insertion of the pressure-proof connector provided in Example 3 of the present invention;

[0040] Figure 2 A three-dimensional diagram of the normal insertion of the full-enclosed needle and socket sockets provided in Example 1 of the present invention;

[0041] Figure 3 A split three-dimensional diagram of the fully enclosed needle and hole bases provided in Example 1 of the present invention;

[0042] Figure 4 A cross-sectional view of a fully enclosed needle and socket socket in normal connection provided by Example 1 of the present invention;

[0043] Figure 5 A three-dimensional diagram of the normal insertion of the needle seat and the full-enclosed socket provided in Example 2 of the present invention;

[0044] Figure 6 A split three-dimensional diagram of a needle seat and a fully enclosed hole seat provided in Example 2 of the present invention;

[0045] Figure 7 A three-dimensional diagram of a fully enclosed socket provided in Example 2 of the present invention;

[0046] Figure 8 A cross-sectional view of a needle hub and a fully enclosed socket provided in Example 2 of the present invention during normal insertion;

[0047] Figure 9 A cross-sectional view of the elastic arm and the locking engagement portion provided in Example 2 of the present invention;

[0048] Figure 10 A three-dimensional diagram of the normal insertion of the needle seat, the fully enclosed hole seat, and the locking piece provided in Example 3 of the present invention;

[0049] Figure 11 A split three-dimensional diagram of the needle seat, the fully enclosed hole seat, and the locking piece provided in Example 3 of the present invention;

[0050] Figure 12 A three-dimensional diagram of a locking piece provided in Example 3 of the present invention;

[0051] Figure 13 A three-dimensional diagram of the elastic arm and the gap provided in Example 3 of the present invention;

[0052] Figure 14 A cross-sectional view of the needle seat, the fully enclosed hole seat, and the locking piece provided in Example 3 of the present invention during normal insertion;

[0053] Figure 15 A three-dimensional diagram of the needle seat, the fully enclosed hole seat, and the locking piece provided in Example 3 of the present invention when properly plugged in;

[0054] Figure 16 Provided in Example 3 of the present invention Figure 15 A partial enlarged view of the middle A;

[0055] In the figure: 1 hole seat; 11 hole seat inner cavity; 12 slot; 13 hole seat covering wall; 14 slide groove; 15 protrusion; 16 gap; 2 needle seat; 21 needle seat inner cavity; 22 needle seat covering wall; 23 rib; 3 locking piece; 31 locking piece body; 32 connecting arm; 33 anti-pressure arm; 34 limiter; 35 baffle; 4 fixing mechanism; 41 elastic arm; 411 hook block; 412 first limit block; 413 groove; 414 second limit block; 42 lock fitting part; 421 limit frame; 422 needle seat rib; 4221 extension plate; 4222 limit groove; 424 limit hole; 5 copper needle; 6 terminal. DETAILED DESCRIPTION

[0056] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0057] Please refer to Figures 1-16 Now, a pressure-proof connector disclosed in the present invention is described. Figure 1, including a hole seat 1, a needle seat 2, a locking piece 3, a fixing mechanism 4, an elastic arm 41, a lock fitting portion 42, a copper needle 5 and a terminal 6. A number of copper needles 5 are inserted at one end of the needle seat 2, the hole seat 1 is inserted at the other end of the needle seat 2, and the hole seat 1 and the needle seat 2 are connected by a fixing mechanism 4. The terminal 6 is inserted in the hole seat 1, and one end of the terminal 6 abuts against the inner wall of the hole seat 1. The locking piece 3 is inserted in the hole seat 1 and abuts against the other end of the terminal 6. The terminal 6 is fixed in the hole seat 1 through the locking piece 3. The fixing mechanism 4 includes an elastic arm 41 and a lock fitting portion 42. The elastic arm 41 is arranged in the inner cavity of the hole seat 1 or the needle seat 2, and the lock fitting portion 42 is arranged on the hole seat 1 or the needle seat 2 where the elastic arm 41 is not installed.

[0058] The present invention provides three protection solutions to address the problem in the prior art that the exposed elastic arm is easily squeezed by external forces, resulting in the failure of the lock:

[0059] Example 1

[0060] In this embodiment, if Figure 2-Figure 4 The needle hub 2 is a fully enclosed structure with a needle hub inner cavity 21. The elastic arm 41 is integrally formed in the needle hub inner cavity 21. The lock fitting portion 42 is integrally formed on the outer wall of the hole hub 1. When the hole hub 1 is inserted into the needle hub 2, the lock fitting portion 42 enters the needle hub inner cavity 21 and cooperates with the elastic arm 41 to form a lock. The fully enclosed structure of the needle hub 2 is formed with a needle hub covering wall 22, which surrounds the outside of the elastic arm 41. The needle hub 2 is designed as a fully enclosed structure, with a needle hub inner cavity 21 formed inside it. The elastic arm 41 is integrally formed in the inner cavity, and the hook-shaped block 411 at the free end faces the insertion entrance. The needle hub covering wall 22 serves as an extension of the wall of the needle hub 2, completely surrounding the elastic arm 41 from the top and sides, forming a rigid protective cover to isolate external extrusion. The hole hub 1 serves as the plug-in end, and its outer wall is provided with a lock fitting portion 42. When the needle hub 2 is inserted into the needle hub 1, the retaining frame 421 enters the needle hub cavity 21, pushing the hook 411 of the elastic arm 41 to elastically deform until it is fully inserted, and the hook 411 rebounds and snaps into the retaining frame 421, forming a lock. The needle hub sheath 22 always seals the elastic arm 41, completely preventing it from collapsing due to external impact or pressure.

[0061] In this embodiment, if Figure 4The free end of the elastic arm 41 extends toward the insertion entrance of the needle seat 2, and the free end of the elastic arm 41 is a hook-shaped block 411. This design ensures that when the hole seat 1 is inserted, its lock fitting portion 42 can smoothly contact the guiding inclined surface of the hook-shaped block 411, pushing the elastic arm 41 to controllably bend and deform elastically. When the hole seat 1 is plugged into place, the elastic arm 41 is reset by the material's rebound force, so that the hook-shaped block 411 is snapped into the limit frame 421 to form a lock. This extension direction not only achieves low-resistance plugging and reliable self-locking, but also eliminates the risk of deformation and failure caused by impact from external objects from the root of the structure. The hook-shaped block 411 serves as the lock structure of the free end of the elastic arm 41. Through its inclined guide surface, it achieves smooth contact and low-resistance elastic deformation of the limit frame 421 in the needle seat 2 when the hole seat 1 is inserted, and relies on the angular hook-shaped profile to snap into the arched space of the limit frame 421 after being plugged into place to form a mechanical interlock.

[0062] In this embodiment, if Figure 4 The locking engagement portion 42 is an arched limit frame 421 that locks with the hook block 411. The needle hub covering wall 22 includes a wall covering the top and side surfaces of the needle hub 2 that covers the elastic arm 41. The limit frame 421 serves as the locking engagement portion 42 of the outer wall of the hole seat 1. When the hole seat 1 is inserted into the needle hub 2, the guide surface of the inner wall of the limit frame 421 contacts the inclined surface of the hook block 411, guiding the controllable deformation of the elastic arm 41. After insertion, the hook block 411 rebounds and engages the limit frame 421, achieving mechanical locking through angle engagement. The needle hub covering wall 22 includes a wall covering the top and side surfaces of the needle hub 2 that covers the elastic arm 41. The needle hub sheath 22, an extension of the needle hub 2, serves as a protective structure. It's designed to strictly cover the top and sides of the elastic arm 41, forming a rigid U-shaped shield: the top wall isolates vertical pressure, while the side walls block lateral impact, fully enclosing the elastic arm 41 in a pressure-resistant environment. This structure prevents external objects from easily and directly contacting the vulnerable parts of the elastic arm 41, completely physically blocking any path that could cause the elastic arm to collapse and fail due to external forces.

[0063] Example 2

[0064] In this embodiment, if Figure 5-Figure 9The fixing mechanism 4 also includes a second usage state, and in the second usage state, the socket 1 is a fully enclosed structure having a socket inner cavity 11. A slot 12 is provided on one side of the outer wall of the socket inner cavity 11 in the insertion direction. The elastic arm 41 is integrally formed in the socket inner cavity 11, and the lock fitting portion 42 is integrally formed on the inner wall of the needle seat 2. When the socket 1 is inserted into the needle seat 2, the lock fitting portion 42 passes through the slot 12 into the socket inner cavity 11 and cooperates with the elastic arm 41 to form a lock. The fully enclosed structure of the socket 1 is formed with a socket covering wall 13, which surrounds the outer side of the elastic arm 41. The socket 1 is designed as a fully enclosed structure, with the socket inner cavity 11 formed inside it, and the elastic arm 41 is integrally formed in the inner cavity. The socket covering wall 13 extends as the wall of the socket 1, strictly covering the top and two sides of the elastic arm 41, forming a closed protective cabin to isolate external extrusion. A slot 12 is provided on the side wall of the socket 1 as a passage for the lock fitting portion 42 in the needle seat 2. During insertion, the needle hub rib 422 of the needle hub 2 passes through the slot 12 and into the socket cavity 11, pushing the first stopper 412 of the elastic arm 41 to deform in a controlled manner until the first stopper 412 rebounds and snaps into the rib's stopper groove 4222, forming a lock. During this process, the socket sheath 13 always wraps around the elastic arm 41, and the slot 12 only allows the needle hub rib 422 to pass in a certain direction. External objects cannot contact the elastic arm 41, protecting the elastic arm 41 from damage, thereby making the connector more stable.

[0065] In this embodiment, if Figure 8-Figure 9 The locking and fitting portion 42 is a needle hub rib 422, which includes an extension plate 4221 and a limiting groove 4222. One end of the extension plate 4221 is integrally formed on the inner wall of the needle hub 2, and the other end of the extension plate 4221 defines a limiting groove 4222. The needle hub rib 422 serves as the locking and fitting portion 42 disposed within the needle hub 2. Extending from the inner wall of the needle hub via the extension plate 4221, it forms a rigid guide channel. The rib 422 precisely passes through the slot 12 of the socket 1, enters the inner cavity 11 of the socket, and contacts the elastic arm 41. The limiting groove 4222 at its end interlocks with the first limiting block 412 of the elastic arm 41 when inserted into place, achieving mechanical fixation.

[0066] In this embodiment, if Figure 6-Figure 9The free end of the elastic arm 41 is provided with a first limiting block 412, which cooperates with the limiting groove 4222 to form a lock. The hole seat covering wall 13 includes a wall body of the hole seat 1 covering the top and sides of the elastic arm 41. The first limiting block 412 serves as a locking unit for the free end of the elastic arm 41. Through its inclined locking surface, it forms a contact interlock with the limiting groove 4222 of the needle seat rib 422 to ensure mechanical stability. At the same time, the elastic arm 41 is embedded in the hole seat inner cavity 11 and is tightly covered from the top and both sides by the hole seat covering wall 13. Only the matching interface with the needle seat rib 422 is exposed through the slot 12. While ensuring a high-strength locking function, it reduces direct extrusion or impact of external objects on the limiting area, preventing the risk of elastic arm failure. The hole seat covering wall 13 serves as a fully enclosed protective structure of the hole seat 1. Its wall extends and strictly covers the top and both sides of the elastic arm 41 to form a rigid isolation cover. The top wall resists vertical extrusion, and the two side walls block lateral impact. At the same time, it forms a closed safety cabin together with the bottom plate of the hole seat inner cavity 11, so that the elastic arm 41 is completely embedded in the system of the hole seat 1, and only the directional slot 12 and the needle seat rib 422 are linked to the lock to ensure that external objects cannot directly contact the area of ​​the elastic arm 41 that is easily deformed, thereby physically reducing the risk of lock failure due to external force.

[0067] Example 3

[0068] In this embodiment, if Figure 14-15 The socket 1 is provided with protrusions 15, which are arranged in pairs and are integrally formed on the outer walls of the socket 1 on both sides. The locking plate 3 includes a locking plate body 31 and a stopper 34. The locking plate body 31 is inserted into the socket 1. The outer walls of the locking plate body 31 are integrally formed with a pair of stoppers 34, which engage with the protrusions 15. The protrusions 15 form a snap connection with the stoppers 34 on the locking plate 3, firmly fixing the locking plate 3 in its initial installation position on the socket 1, providing stable support for the elastic arm 41, and locking the position of the locking plate 3, ensuring the precise positioning of the anti-pressure arm.

[0069] In this embodiment, if Figure 13-14The fixing mechanism 4 also includes a third use state. In the third use state, the lock engaging portion 42 is a limiting hole 424 defined on the outer wall of the needle hub 2. A rib 23 is provided below the limiting hole 424. Both ends of the rib 23 are integrally formed on the inner wall of the needle hub 2. The elastic arm 41 is mounted on the outer wall of the hole hub 1. A gap 16 is defined between the free end of the elastic arm 41 and the outer wall of the hole hub 1. A pair of slide grooves 14 are provided on either side of the gap 16. The slide grooves 14 are defined on the hole hub 1. A groove 413 is defined on the outer wall of the elastic arm 41. The elastic arm 41 also has a second limiting block 414 integrally formed thereon. The slide grooves 14 provide a sliding track for the anti-pressure arm 33 of the locking plate 3, ensuring that the anti-pressure arm 33 of the locking plate 3 can slide stably in a predetermined direction when the rib 23 of the needle hub 2 pushes the baffle 35, thereby achieving movement from the protection position (abutting against the bottom of the elastic arm 41) to the release position. When not plugged in, the anti-pressure arm 33 occupies the gap 16 and abuts the elastic arm 41, thereby protecting the elastic arm 41. When plugged in, the rib 23 pushes the anti-pressure arm 33 to slide out of the gap 16, thereby releasing the restriction and protection of the elastic arm 41. The guide surface of the limiting hole 424 contacts the second limiting block 414, guiding the controllable deformation of the elastic arm 41. After being plugged in, the second limiting block 414 rebounds and engages the limiting hole 424, achieving mechanical locking through angle engagement, and the anti-pressure arm 33 has been removed, allowing the elastic arm to be directly pressed to utilize the gap 16 to deform, thereby disengaging from the limiting hole 424 and unlocking, without the need to pre-disassemble the locking plate, thereby achieving the dual functions of anti-pressure and convenient unlocking.

[0070] In this embodiment, if Figures 10-16 The locking piece 3 also includes a connecting arm 32, an anti-pressure arm 33, a limiter 34 and a baffle 35. One end of the connecting arm 32 is installed on the top of the locking piece body 31, and the other end is installed with an anti-pressure arm 33. The anti-pressure arm 33 is slidably connected to the slide groove 14, and the anti-pressure arm 33 is against the bottom of the elastic arm 41. The front end of the baffle 35 is integrally formed on the outer wall of the anti-pressure arm 33. The locking piece body 31 is inserted into the hole seat 1 and fixes the terminal 6. The connecting arm 32 connects the locking piece body 31 and the anti-pressure arm 33. The anti-pressure arm 33 is an actuator. In the initial state, it occupies the gap 16 area and abuts against the lower end of the elastic arm 41, forming a physical barrier to protect the elastic arm 41. The baffle 35 is provided on the outer wall of the anti-pressure arm 33. When plugged in, it is pushed by the rib 23 of the needle seat 2, driving the anti-pressure arm 33 to slide outward along the slide groove 14 and disengage from the gap. After being plugged in, the anti-pressure arm 33 is completely removed, allowing the elastic arm 41 to be directly pressed to unlock without removing the locking piece, thereby achieving the unity of anti-pressure protection and convenient unlocking.

[0071] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A pressure-proof connector, characterized in that: include: A needle holder (2), one end of which is provided with a plurality of copper needles (5); A hole seat (1) is inserted into the other end of the needle seat (2), and the hole seat (1) and the needle seat (2) are connected via a fixing mechanism (4); A terminal (6) is inserted into the hole seat (1), and one end of the terminal (6) abuts against the inner wall of the hole seat (1); A locking piece (3) is inserted into the hole seat (1) and abuts against the other end of the terminal (6); the terminal (6) is fixed in the hole seat (1) through the locking piece (3); The fixing mechanism (4) comprises an elastic arm (41) and a locking fitting portion (42), wherein the elastic arm (41) is arranged in the inner cavity of the hole seat (1) or the needle seat (2), and the locking fitting portion (42) is arranged on the hole seat (1) or the needle seat (2) where the elastic arm (41) is not installed.

2. The pressure-proof connector according to claim 1, wherein: The fixing mechanism (4) includes at least a first use state, and in the first use state, the needle seat (2) is a fully enclosed structure having a needle seat inner cavity (21); The elastic arm (41) is integrally formed in the needle seat inner cavity (21); The lock fitting portion (42) is integrally formed on the outer wall of the hole seat (1); When the hole seat (1) is inserted into the needle seat (2), the locking fitting portion (42) enters the needle seat inner cavity (21) and cooperates with the elastic arm (41) to form a locking fitting, and the full-enclosed structure of the needle seat (2) is formed with a needle seat covering wall (22) which surrounds the outside of the elastic arm (41).

3. The pressure-proof connector according to claim 2, wherein: The free end of the elastic arm (41) extends toward the insertion inlet of the needle seat (2), and the free end of the elastic arm (41) is a hook-shaped block (411).

4. The pressure-proof connector according to claim 3, wherein: The locking and fitting portion (42) is a limit frame (421) with an arched structure, and the limit frame (421) is locked and fitted with the hook-shaped block (411); The needle seat covering wall (22) comprises a wall body of the needle seat (2) covering the top and side surfaces of the elastic arm (41).

5. The pressure-proof connector according to claim 1, wherein: The fixing mechanism (4) further includes a second use state, and in the second use state, the hole seat (1) is a fully enclosed structure having a hole seat inner cavity (11), and a slot (12) is provided on an outer wall on one side of the hole seat inner cavity (11) in the plugging direction; The elastic arm (41) is integrally formed in the inner cavity (11) of the hole seat; The locking fitting portion (42) is integrally formed on the inner wall of the needle seat (2); When the hole seat (1) is inserted into the needle seat (2), the locking fitting portion (42) passes through the slot (12) into the hole seat inner cavity (11) and cooperates with the elastic arm (41) to form a locking fitting. The fully enclosed structure of the hole seat (1) is formed with a hole seat covering wall (13) which surrounds the outer side of the elastic arm (41).

6. The pressure-proof connector according to claim 5, wherein: The locking fitting portion (42) is a needle seat rib (422), and the needle seat rib (422) includes an extension plate (4221) and a limiting groove (4222). One end of the extension plate (4221) is integrally formed on the inner wall of the needle seat (2), and the other end of the extension plate (4221) is provided with the limiting groove (4222).

7. The pressure-proof connector according to claim 6, wherein: A first limiting block (412) is provided at the free end of the elastic arm (41), and the first limiting block (412) cooperates with the limiting groove (4222) to form a lock buckle; The hole seat covering wall (13) comprises a wall body of the hole seat (1) covering the top and side surfaces of the elastic arm (41).

8. The pressure-proof connector according to claim 1, wherein: The hole seat (1) is provided with protrusions (15), and the protrusions (15) are provided in pairs and are integrally formed on the outer walls of both sides of the hole seat (1); The locking piece (3) comprises a locking piece body (31) and a limiting piece (34). The locking piece body (31) is inserted into the hole seat (1). The limiting pieces (34) are formed in pairs on the outer walls of both sides of the locking piece body (31). The limiting pieces (34) are engaged with the protrusion (15).

9. The pressure-proof connector according to claim 8, wherein: The fixing mechanism (4) further includes a third use state, and in the third use state, the lock fitting portion (42) is a limiting hole (424) provided on the outer wall of the needle seat (2), a convex rib (23) is provided below the limiting hole (424), and both ends of the convex rib (23) are integrally formed on the inner wall of the needle seat (2); The elastic arm (41) is mounted on the outer wall of the hole seat (1), and a gap (16) is provided between the free end of the elastic arm (41) and the outer wall of the hole seat (1); A pair of slide grooves (14) are provided on both sides of the gap (16), and the slide grooves (14) are opened on the hole seat (1); The outer wall of the elastic arm (41) is provided with a groove (413), and the elastic arm (41) is also integrally formed with a second limiting block (414).

10. The pressure-proof connector according to claim 9, wherein: The locking piece (3) further comprises: A connecting arm (32), one end of which is mounted on the top of the locking plate body (31), and the other end of which is mounted with an anti-pressure arm (33), wherein the anti-pressure arm (33) is slidably connected to the slide groove (14), and the anti-pressure arm (33) is against the bottom of the elastic arm (41); The baffle (35) has a front end integrally formed on the outer wall of the anti-pressure arm (33).

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