Probe type connector
By employing a nested waterproof cap in the probe connector to snap into the needle tube, combined with multi-layer sealing rings and staggered insertion structure, the problem of easy water leakage between the needle tip and the needle seat is solved, achieving stable connection in humid environments and improving service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-14
AI Technical Summary
In existing probe connectors, the tiny gap between the probe tip and the probe base can easily allow water and impurities to enter, affecting the reliability and service life of the connector.
The nested waterproof cap and needle tube are fitted together, and the multi-layer sealing ring and staggered insertion structure form a waterproof seal to prevent water and impurities from penetrating. The elastic element maintains a stable connection with the needle.
It effectively prevents moisture and impurities from entering, ensuring the connector can be used normally in humid environments, improving reliability and service life, and maintaining a stable connection under frequent plugging and unplugging and external force.
Smart Images
Figure CN224123581U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connector technology, and in particular to a probe-type connector. Background Technology
[0002] In existing probe connectors, there are typically three main parts: the probe base, the probe tip, and a spring located inside the probe base. One end of the probe tip extends into the probe base and is elastically connected by the spring, while the other end extends out of the probe base to connect with other components.
[0003] However, this structure inevitably results in a tiny gap between the probe tip and the probe seat, which provides a channel for water and other impurities to enter the probe connector. Once water or other impurities enter the gap, it can cause corrosion, deterioration of electrical performance, or short circuits in the probe connector, thus affecting its reliability and service life. Utility Model Content
[0004] The main purpose of this invention is to propose a probe-type connector, which aims to solve the problem that liquid or impurities can easily enter the gap between the needle tube and the needle tip in existing connectors.
[0005] To achieve the above objectives, the present invention proposes a probe-type connector, which includes:
[0006] The syringe has an internal cavity.
[0007] The needle is movably disposed within the accommodating cavity. The needle includes a head, an abutment, and a tail connected in sequence. The outer diameter of the head and the outer diameter of the tail are both smaller than the outer diameter of the abutment.
[0008] A waterproof cap is fitted around the head of the syringe and snaps into place; both the head of the needle and the head of the syringe are press-fitted with the waterproof cap.
[0009] An elastic element is sleeved on the outer periphery of the tail portion, and both ends of the elastic element abut against the abutting portion and the bottom of the accommodating cavity, respectively.
[0010] In one embodiment, the probe connector further includes a first male-female connector structure, through which the waterproof cap and the needle tube are connected and fixed.
[0011] In one embodiment, the first concave-convex insertion structure includes a first protrusion and a first groove that cooperate with each other. The first protrusion is disposed on the outer wall of the needle tube, and the first groove is disposed on the inner wall of the waterproof cap.
[0012] In one embodiment, the probe connector further includes a second convex-concave insertion structure, which is disposed adjacent to the first convex-concave insertion structure. The waterproof cap and the needle tube are jointly inserted and fixed by the first convex-concave insertion structure and the second convex-concave insertion structure.
[0013] In one embodiment, the second protrusion-contact structure includes a second protrusion and a second groove that cooperate with each other. The second groove is disposed on the outer wall of the needle tube, and the second protrusion is disposed on the inner wall of the waterproof cap.
[0014] In one embodiment, a conical sealing portion is formed on the top inner wall of the waterproof cap, and the end face of the needle head is provided with a chamfered surface that fits into the conical sealing portion.
[0015] In one embodiment, the waterproof cap has a flow channel inside, and the flow channel extends from the top of the waterproof cap to the base of the waterproof cap.
[0016] In one embodiment, the probe connector further includes a mounting sleeve, which is fitted over the outside of the needle tube. The outer periphery of the needle tube is provided with a limiting protrusion, which is interference-fitted with the inner wall of the mounting sleeve.
[0017] In one embodiment, the probe connector further includes a snap-fit structure disposed between the mounting sleeve and the needle tube to connect the mounting sleeve and the needle tube.
[0018] In one embodiment, the snap-fit structure includes a locking groove and a locking ring that cooperate with each other. The locking groove is located on the inner wall of the mounting sleeve, and the locking ring is located on the outer wall of the needle tube.
[0019] The technical solution of this utility model involves covering the outside of the needle tube with a waterproof cap. This nested snap-fit structure forms a waterproof seal, effectively preventing external moisture or impurities from seeping in through the gap between the needle tube and the needle tip, ensuring the normal use of the connector in humid environments. Furthermore, the needle tip consists of a head, an abutment portion, and a tail. When the elastic element is fitted around the outer periphery of the needle tip tail, one end is engaged in the limiting groove of the abutment portion, while the other end abuts against the bottom of the accommodating cavity. During the movement of the needle tip, when the elastic element is compressed or stretched, it ensures that the elastic element always maintains a relatively fixed connection with the abutment portion, guaranteeing stable force transmission between the elastic element and the needle tip. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of a probe-type connector according to an embodiment of the present invention.
[0022] Figure 2 A front view of the structure of an embodiment of the probe-type connector provided by this utility model;
[0023] Figure 3 A cross-sectional view of another embodiment of the probe connector provided by this utility model;
[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle.
[0025] Explanation of icon numbers:
[0026] 100. Probe connector; 1. Needle tube; 11. Limiting protrusion; 2. Needle tip; 21. Head; 22. Abutting part; 23. Tail; 3. Waterproof cap; 4. Elastic element; 5. First concave-convex insertion structure; 51. First protrusion; 52. First groove; 6. Second concave-convex insertion structure; 61. Second protrusion; 62. Second groove; 7. Mounting sleeve; 8. Snap-fit structure; 81. Snap-fit groove; 82. Snap-fit ring.
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] 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 scope of protection of the present utility model.
[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0031] In existing probe structures, there is an unavoidable tiny gap between the probe tip and the probe seat. This provides a channel for water and other impurities to enter the probe connector. Once water or other impurities enter the gap, it can lead to corrosion, deterioration of electrical performance, or short circuits in the probe connector, thereby affecting its reliability and service life.
[0032] This invention proposes a probe-type connector.
[0033] Please see Figures 1 to 3 In one embodiment of this utility model, the probe-type connector 100 includes:
[0034] Needle 1, with an internal cavity;
[0035] The needle 2 is movably disposed in the receiving cavity. The needle 2 includes a head 21, an abutment part 22 and a tail part 23 connected in sequence. The outer diameter of the head 21 and the outer diameter of the tail 23 are both smaller than the outer diameter of the abutment part 22.
[0036] A waterproof cap 3 is fitted around the head 21 of the syringe 1 and snaps into place. Both the head 21 of the needle 2 and the head 21 of the syringe 1 are press-fitted with the waterproof cap 3.
[0037] The elastic element 4 is sleeved on the outer periphery of the tail 23, and the two ends of the elastic element 4 abut against the abutting part 22 and the bottom of the accommodating cavity, respectively.
[0038] The technical solution of this utility model is to cover the outside of the needle tube 1 with a waterproof cap 3. This nested snap-fit structure 8 forms a waterproof seal, which can effectively prevent external moisture or impurities from seeping in through the gap between the needle tube 1 and the needle 2, ensuring the normal use of the connector in humid environments. In addition, the needle 2 is divided into a head 21, an abutment part 22 and a tail 23. When the elastic member 4 is sleeved on the outer periphery of the tail 23 of the needle 2, one end of it is stuck in the limiting groove of the abutment part 22, and the other end abuts against the bottom of the accommodating cavity. During the movement of the needle 2, when the elastic member 4 is compressed or stretched, it ensures that the elastic member 4 always maintains a relatively fixed connection with the abutment part 22, ensuring the stable transmission of force between the elastic member 4 and the needle 2.
[0039] Specifically, the waterproof cap 3 has a multi-layer sealing ring structure at the interference fit points with the head 21 of the needle tube 1 and the head 21 of the needle 2. The sealing rings can be made of elastic materials such as silicone rubber. When the waterproof cap 3 is fitted onto the head 21 of the needle tube 1 and the head 21 of the needle 2, the multi-layer silicone rubber sealing rings are compressed. Due to the good elasticity and sealing performance of silicone rubber, the multi-layer sealing rings form multiple sealing barriers. Even if the outermost sealing ring is slightly damaged or has a small gap, the inner sealing rings can still prevent water from entering, thereby further improving the waterproof sealing performance of the waterproof cap 3. The elastic element 4 can be a variable diameter spring structure, where the spring diameter gradually increases from the end near the abutment part 22 of the needle 2 towards the end near the bottom of the receiving cavity. Thus, when the needle 2 moves towards the bottom of the receiving cavity under external pressure, the smaller diameter portion of the variable diameter spring is compressed first. As the pressure increases, the larger diameter portion gradually participates in the compression process. Because the spring stiffness varies with different diameter portions, this structure allows the elastic element 4 to provide different elastic forces at different compression stages.
[0040] In the embodiments of this utility model, please refer to Figure 3 and Figure 4 The probe connector 100 also includes a first convex-concave insertion structure 5, through which the waterproof cap 3 and the needle tube 1 are inserted and fixed. The first convex-concave insertion structure 5 includes matching annular protrusions and annular grooves. The annular protrusion can be provided on one of the inner wall of the waterproof cap 3 and the outer wall of the needle tube 1, and the annular groove can be provided on the other. Through the insertion and cooperation of the annular protrusion and the annular groove, the connection between the waterproof cap 3 and the needle tube 1 is more stable. When subjected to external forces (such as vibration, pulling, etc.), this insertion structure can effectively prevent the waterproof cap 3 from shifting or loosening relative to the needle tube 1.
[0041] In the embodiments of this utility model, please refer to Figure 4The first interlocking structure 5 includes a first protrusion 51 and a first groove 52 that cooperate with each other. The first protrusion 51 is located on the outer wall of the needle tube 1, and the first groove 52 is located on the inner wall of the waterproof cap 3. The first protrusion 51 can be a plurality of rectangular protrusions evenly distributed along the circumference of the outer wall of the needle tube 1. The first groove 52 is an intermittent rectangular groove that matches the first protrusion 51 to ensure a good fit. Optionally, a sealing coating can also be provided on the outer surface of the first protrusion 51 and the inner surface of the second groove 62. The sealing coating further fills the tiny gap between the protrusion and the groove, preventing moisture from seeping in from the interlocking part.
[0042] In the embodiments of this utility model, please refer to Figure 4 The probe connector 100 also includes a second male-female connector structure 6, which is arranged adjacent to the first male-female connector structure 5. The waterproof cap 3 and the needle tube 1 are jointly connected and fixed through the first male-female connector structure 5 and the second male-female connector structure 6. Optionally, the first male-female connector structure 5 and the second male-female connector structure 6 are staggered in the circumferential direction. When an external force is applied to the connection between the waterproof cap 3 and the needle tube 1, this staggered distribution structure can distribute the force more evenly around the connection. For example, when subjected to a lateral force, the force will not be concentrated on a single connector structure, but will be evenly distributed through the two connector structures, reducing the stress intensity of a single connector structure.
[0043] In the embodiments of this utility model, please refer to Figure 4 The second concave-convex insertion structure 6 includes a cooperating second protrusion 61 and a second groove 62. The second groove 62 is located on the outer wall of the needle tube 1, and the second protrusion 61 is located on the inner wall of the waterproof cap 3. The second groove 62 can be a plurality of semi-circular grooves evenly distributed along the circumference of the outer wall of the needle tube 1, and the second protrusion 61 is a semi-circular protrusion located on the inner wall of the waterproof cap 3. Furthermore, the first protrusion 51 and the second protrusion 61 are respectively located on the needle tube 1 and the waterproof cap 3, so that the connection between the waterproof cap 3 and the needle tube 1 is fixed from two directions (the first concave-convex insertion structure 5 is from one direction, and the second concave-convex insertion structure 6 is from the opposite direction). With this bidirectional insertion structure, the waterproof cap 3 can be effectively prevented from rotating, loosening, or falling off relative to the needle tube 1 when subjected to frequent insertion and removal operations or multi-directional external forces.
[0044] In this embodiment of the invention, a conical sealing portion is formed on the inner top wall of the waterproof cap 3, and the end face of the needle tube head 21 is provided with a chamfered surface that fits into the conical sealing portion. When the waterproof cap 3 is fitted onto the needle tube 1, the conical sealing portion and the chamfered surface fit tightly together. This fitting method increases the sealing contact area and forms an effective waterproof barrier. In this embodiment, the size of the cone angle of the conical sealing portion and the angle of the chamfered surface are not limited; the cone angle can range from 45° to 60°, and the chamfer angle can range from 40° to 55°.
[0045] In this embodiment of the invention, the waterproof cap 3 has a flow guide groove inside, which extends from the top of the waterproof cap 3 to its base. The flow guide groove can be a semi-circular groove, and multiple grooves can be evenly arranged inside the waterproof cap 3, providing more communication channels between the internal space of the waterproof cap 3 and the outside. When the external environmental pressure changes (such as pressure changes caused by temperature changes), the pressure inside the waterproof cap 3 can be quickly balanced with the outside through the flow guide groove, reducing the impact of internal pressure accumulation on the connection structure between the waterproof cap 3 and the needle tube 1.
[0046] In the embodiments of this utility model, please refer to Figures 1 to 3 The probe connector 100 also includes a mounting sleeve 7, which is fitted over the outside of the needle tube 1. A limiting protrusion 11 is provided on the outer periphery of the needle tube 1, and the limiting protrusion 11 is press-fitted with the inner wall of the mounting sleeve 7. The press-fit between the limiting protrusion 11 on the outer periphery of the needle tube 1 and the inner wall of the mounting sleeve 7 makes the needle tube 1 more securely fixed within the mounting sleeve 7. The limiting protrusion 11 can be an extended annular boss, or it can have a groove inside the mounting sleeve 7, the groove matching the shape of the boss, so that the needle tube 1 can be accurately installed inside the mounting sleeve 7.
[0047] In the embodiments of this utility model, please refer to Figure 3 The probe connector 100 also includes a snap-fit structure 8, which is located between the mounting sleeve 7 and the needle tube 1 to connect them. The snap-fit structure 8 makes the connection between the mounting sleeve 7 and the needle tube 1 more secure. When the probe connector 100 is subjected to external forces such as vibration or shaking, the snap-fit structure 8 can effectively prevent relative displacement between the mounting sleeve 7 and the needle tube 1. When assembling the mounting sleeve 7 and the needle tube 1, the operator only needs to gently push them in to complete the connection, without the need for complex alignment or fixing operations. Compared with traditional connection methods (such as bolt connections), this reduces assembly difficulty and improves production efficiency.
[0048] In the embodiments of this utility model, please refer to Figure 3 The snap-fit structure 8 includes a locking groove 81 and a locking ring 82 that cooperate with each other. The locking groove 81 is located on the inner wall of the mounting sleeve 7, and the locking ring 82 is located on the outer wall of the needle tube 1. The locking groove 81 can be an annular groove, and the locking ring 82 can be a circular ring. The tight fit between the locking ring 82 and the locking groove 81 makes the connection between the mounting sleeve 7 and the needle tube 1 more secure. Optionally, a small elastic protrusion can be provided on one side of the locking ring 82, and a small recess can be provided at a corresponding position on the locking groove 81. When disassembly is required, pressing the elastic protrusion on the locking ring 82 to disengage it from the recess in the locking groove 81 can easily separate the mounting sleeve 7 and the needle tube 1.
[0049] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A probe-type connector, characterized in that, The probe-type connector includes: The syringe has an internal cavity. The needle is movably disposed within the accommodating cavity. The needle includes a head, an abutment, and a tail connected in sequence. The outer diameter of the head and the outer diameter of the tail are both smaller than the outer diameter of the abutment. A waterproof cap is fitted around the head of the syringe and snaps into place; both the head of the needle and the head of the syringe are press-fitted with the waterproof cap. An elastic element is sleeved on the outer periphery of the tail portion, and both ends of the elastic element abut against the abutting portion and the bottom of the accommodating cavity, respectively.
2. The probe-type connector as described in claim 1, characterized in that, The probe connector further includes a first convex-concave insertion structure, through which the waterproof cap and the needle tube are inserted and fixed.
3. The probe-type connector as described in claim 2, characterized in that, The first concave-convex insertion structure includes a first protrusion and a first groove that cooperate with each other. The first protrusion is disposed on the outer wall of the needle tube, and the first groove is disposed on the inner wall of the waterproof cap.
4. The probe-type connector as described in claim 3, characterized in that, The probe connector further includes a second convex-concave insertion structure, which is arranged adjacent to the first convex-concave insertion structure. The waterproof cap and the needle tube are connected and fixed together by the first convex-concave insertion structure and the second convex-concave insertion structure.
5. The probe-type connector as described in claim 4, characterized in that, The second concave-convex insertion structure includes a matching second protrusion and a second groove, the second groove being disposed on the outer wall of the needle tube and the second protrusion being disposed on the inner wall of the waterproof cap.
6. The probe connector as described in claim 1, characterized in that, A conical sealing part is formed on the top inner wall of the waterproof cap, and the end face of the needle head is provided with a chamfered surface that fits with the conical sealing part.
7. The probe connector as described in claim 6, characterized in that, The waterproof cap has an internal drainage channel that extends from the top of the waterproof cap to its base.
8. The probe connector as described in any one of claims 1 to 7, characterized in that, The probe connector also includes a mounting sleeve, which is fitted over the outside of the needle tube. The outer periphery of the needle tube is provided with a limiting protrusion, which is interference-fitted with the inner wall of the mounting sleeve.
9. The probe connector as described in claim 8, characterized in that, The probe connector further includes a snap-fit structure disposed between the mounting sleeve and the needle tube to connect the mounting sleeve and the needle tube.
10. The probe connector as described in claim 9, characterized in that, The snap-fit structure includes a slot and a ring that cooperate with each other. The slot is located on the inner wall of the mounting sleeve, and the ring is located on the outer wall of the needle tube.