Probe connector

Abstract

The utility model discloses a kind of probe type connectors, it is related to connector technical field, probe type connector includes needle tube, needle, waterproof ring and elastic piece, wherein, the inside of needle tube forms cavity;The needle includes the abutting portion and tail portion connected, the outer diameter of abutting portion is greater than the outer diameter of tail portion, and tail portion end close to abutting portion and abutting portion are located in cavity inside;Waterproof ring is located between the outer wall of needle and the inner wall of needle tube, and with the cavity wall of cavity interference fit;Elastic piece is sleeved in the outer periphery of tail portion, and the two ends of elastic piece are respectively with the abutting portion and the cavity bottom abutting.The technical scheme provided by the utility model solves the problem that liquid or impurities are easily entered into the gap between the needle tube and the needle in the existing connector.

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 usually 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 includes a connecting abutment and a tail, the outer diameter of the abutment is larger than the outer diameter of the tail, and the end of the tail near the abutment and the abutment are both located within the cavity;

[0008] A waterproof ring is disposed between the outer wall of the needle tip and the inner wall of the needle tube, and is interference-fitted with the cavity wall; and

[0009] An elastic element is sleeved on the outer periphery of the tail portion, and the two ends of the elastic element abut against the abutting portion and the bottom of the cavity, respectively.

[0010] In one embodiment, the abutment portion is recessed in the circumferential direction with an installation groove, and at least a portion of the waterproof ring is embedded in the installation groove.

[0011] In one embodiment, a recess is formed on the cavity wall, a portion of the waterproof ring is interference-fitted with the recess, and the remaining portion of the waterproof ring is interference-fitted with the mounting groove.

[0012] In one embodiment, the mounting groove is arc-shaped or trapezoidal in the longitudinal section of the abutment portion.

[0013] In one embodiment, the mounting groove is a continuous annular groove; or, the mounting groove is a spiral groove arranged along the axial direction of the abutment portion, and the waterproof ring is a spiral collar.

[0014] In one embodiment, the inner wall of the needle tube is recessed with a receiving groove, and at least a portion of the waterproof ring is embedded in the receiving groove.

[0015] In one embodiment, the needle further includes a head connected to the abutment portion, the end of the abutment portion extending outside the needle tube, and an installation step forming at the connection between the head and the abutment portion, with the waterproof ring embedded in the installation step and the receiving groove.

[0016] In one embodiment, the needle tube has an opening for inserting the needle tip, the opening is in communication with the cavity, and the receiving groove is disposed on the inner side near or away from the opening.

[0017] In one embodiment, the waterproof ring is made of an elastic material.

[0018] 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 has a protrusion that is interference-fitted with the inner wall of the mounting sleeve.

[0019] The technical solution of this utility model involves placing the abutment part of the needle tip inside the cavity of the needle tube, and placing a waterproof ring between the outer wall of the needle tip and the inner wall of the needle tube. This creates an interference fit between the waterproof ring and the outer wall of the needle tip and the inner wall of the needle tube, forming a seal. This eliminates any gaps between the outer wall of the needle tip and the inner wall of the needle tube, effectively preventing external moisture, dust, and other impurities from entering the cavity and causing damage to the internal equipment, thus affecting the electrical connection performance. Furthermore, the waterproof ring provides additional support and positioning for the needle tip within the cavity. When the connector is subjected to external vibration, impact, or different installation postures, the waterproof ring can buffer these external forces on the needle tip, reducing the risk of unnecessary friction and collision between the outer wall of the needle tip and the inner wall of the needle tube, thereby extending the service life of the connector. 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 1This is a schematic diagram of a probe-type connector according to an embodiment of the present invention.

[0022] Figure 2 A cross-sectional view of a probe-type connector embodiment provided by this utility model;

[0023] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 A cross-sectional view of another embodiment of the probe connector provided by this utility model;

[0025] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0026] Figure 6 A cross-sectional view of another embodiment of the probe-type connector provided by this utility model;

[0027] Figure 7 This is a cross-sectional view of another embodiment of the probe-type connector provided by this utility model.

[0028] Explanation of icon numbers:

[0029] 100. Probe connector; 1. Needle tube; 10. Opening; 11. Protrusion; 12. Receiving groove; 2. Needle tip; 20. Mounting step; 21. Abutment part; 211. Mounting groove; 22. Head; 23. Tail; 3. Waterproof ring; 4. Elastic element; 5. Mounting sleeve.

[0030] 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

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Currently, the existing 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 lead to corrosion, degraded electrical performance, or short circuits in the probe connector, thus affecting its reliability and service life.

[0035] This invention proposes a probe-type connector.

[0036] Please see Figures 1 to 3 In one embodiment of this utility model, the probe-type connector 100 includes:

[0037] Needle 1, with an internal cavity;

[0038] The needle 2 includes a connecting part 21 and a tail 23. The outer diameter of the connecting part 21 is larger than the outer diameter of the tail 23. The end of the tail 23 near the connecting part 21 and the connecting part 21 are both located in a cavity. A mounting groove 211 is recessed in the circumference of the connecting part 21.

[0039] Waterproof ring 3 is embedded in mounting groove 211 and has an interference fit with the cavity wall; and

[0040] 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 21 and the bottom of the cavity, respectively.

[0041] The technical solution of this utility model involves placing the abutment portion 21 of the needle tip 2 inside the cavity of the needle tube 1, and placing a waterproof ring 3 between the outer wall of the needle tip 2 and the inner wall of the needle tube 1. This creates an interference fit between the waterproof ring 3 and the outer wall of the needle tip 2 and the inner wall of the needle tube 1, forming a seal. This eliminates any gaps between the outer wall of the needle tip 2 and the inner wall of the needle tube 1, effectively preventing external moisture, dust, and other impurities from entering the cavity and causing damage to the internal components of the needle tube 1, thus affecting the electrical connection performance. Furthermore, the waterproof ring 3 provides additional support and positioning for the needle tip 2 within the cavity. When the connector is subjected to external vibration, impact, or different installation postures, the waterproof ring 3 can buffer these external forces on the needle tip 2, reducing the risk of unnecessary friction and collision between the outer wall of the needle tip 2 and the inner wall of the needle tube 1, thereby extending the connector's service life.

[0042] Specifically, the needle tube 1 can be made of metal, such as stainless steel. For example, a 304 stainless steel needle tube 1 has good mechanical strength and corrosion resistance, providing a robust outer shell structure for the cavity and protecting internal components from external physical damage. Alternatively, a copper alloy needle tube 1, such as a brass needle tube 1, can be used. It has good conductivity and can effectively transmit electrical signals in applications with high electrical performance requirements. The contact part 21 and the tail part 23 can be integrally machined. For example, the needle tip 2 can be made of hard alloy (such as tungsten carbide) using precision machining, resulting in high hardness and ensuring wear resistance during frequent insertion and removal, thus improving the connector's lifespan. The outer diameter of the contact part 21 and the tail part 23 can be adjusted according to specific application requirements. For example, in applications requiring high current transmission, the outer diameter of the contact part 21 can be appropriately increased to increase the contact area with other components and reduce contact resistance. The elastic element 4 can be a helical spring. For example, a helical spring made of piano wire can be used. Piano wire has high strength and elastic limit, providing stable elastic force over a wide deformation range. The waterproof ring 3 can be made of highly elastic materials such as silicone, allowing it to undergo corresponding elastic deformation as it moves up and down with the abutment part 21. It should be noted that the gap between the inner wall of the needle tube 1 and the outer wall of the needle 2 should be slightly smaller than the gap of the waterproof ring 3. During the insertion of the waterproof ring 3, it will be appropriately compressed and deformed to ensure an interference fit between it and both the inner wall of the needle tube 1 and the outer wall of the needle 2.

[0043] In the embodiments of this utility model, please refer to Figures 2 to 5A mounting groove 211 is provided circumferentially on the abutment portion 21. The mounting groove 211 can be located at any position on the abutment portion 21, as long as at least a portion of the waterproof ring 3 is embedded in the mounting groove 211 and has an interference fit with the inner wall of the needle tube 1. For example, the mounting groove 211 can be located at the center of the abutment portion 21 to divide the abutment portion 21 into two equal parts. Since the mounting groove 211 is located at the center of the abutment portion 21 along its length direction, dividing it into two equal parts, the waterproof ring 3 can achieve a more balanced sealing pressure distribution within the cavity. The centrally located mounting groove 211 makes the waterproof ring 3 more stable during the axial movement of the needle 2. When the needle 2 retracts or extends, the sealing state of the waterproof ring 3 on the cavity wall is less affected by eccentric forces. Compared with the scheme without a centrally located mounting groove 211, the waterproof ring 3 in this scheme can maintain its sealing performance for a longer period of time under frequent insertion and removal or long-term vibration environments, reducing the risk of damage to internal components due to seal failure.

[0044] In an embodiment of this invention, a recess (not shown) is formed on the cavity wall. A portion of the waterproof ring 3 is press-fitted with the recess, and the remaining portion of the waterproof ring 3 is press-fitted with the mounting groove 211. The recess can be an arc-shaped annular groove, dividing the waterproof ring 3 into two parts: one placed in the mounting groove 211 and the other placed in the recess. That is, the press-fit between the recess on the cavity wall and the waterproof ring 3, plus the press-fit between the mounting groove 211 and the waterproof ring 3, forms a double sealing structure. The double press-fit makes the sealing of the waterproof ring 3 more stable in both the axial and radial directions. In the axial direction, when the needle 2 has extension and retraction movement, the recess on the cavity wall and the mounting groove 211 can limit the displacement of the waterproof ring 3, reducing the possibility of seal failure. In the radial direction, the two press-fit areas work together to make the sealing contact surface pressure between the waterproof ring 3 and the cavity wall more uniform, further improving the sealing effect.

[0045] In the embodiments of this utility model, please refer to Figure 3 In the longitudinal section of the abutment portion 21, the mounting groove 211 is arc-shaped, for example, semi-circular. This shape is more compatible with the shape of the waterproof ring 3, making it less prone to lateral or rotational displacement of the waterproof ring 3 within the arc-shaped groove. The arc-shaped mounting groove 211 allows the waterproof ring 3 to be subjected to more even force during installation, thereby achieving better initial fit, which helps to improve the sealing effect between the waterproof ring 3 and the mounting groove 211. Optionally, the curvature of the arc is equal to the curvature of the outer contour of the waterproof ring 3, ensuring a near-perfect fit between the waterproof ring 3 and the mounting groove 211 with minimal gaps, greatly reducing the possibility of liquid or gas molecule penetration. Furthermore, the waterproof ring 3 can act as a stable force transmission medium, accurately transmitting the force of the needle 2 to the cavity wall, thereby improving the stability of the entire probe connector 100's mechanical structure. Further, please refer to... Figure 5 In the longitudinal section of the abutment portion 21, the mounting groove 211 can be trapezoidal. The two inclined sides of the trapezoid can act as a barrier to the waterproof ring 3 in the radial direction, preventing the waterproof ring 3 from coming out of the mounting groove 211 when subjected to external pressure (such as pressure changes in the cavity or impact forces generated by external vibration). Due to the slope of the trapezoidal groove wall, the waterproof ring 3 will be slightly squeezed and deformed during installation, thereby filling the tiny gap between the groove wall and itself, improving the sealing effect.

[0046] In this embodiment of the invention, the mounting groove 211 is a continuous annular groove, which, when combined with the waterproof ring 3, achieves an all-around seal. Compared to a non-annular groove structure, the annular groove has no breaks in the seal, effectively preventing leakage of liquid or gas from any direction, whether in static or dynamic conditions. Alternatively, the mounting groove 211 can be a spiral groove arranged axially along the abutment portion 21, and the waterproof ring 3 can be a spiral collar. The spiral structure can adapt to the axial extension and rotation of the equipment to a certain extent. For example, in some equipment that needs to maintain a seal during rotation (such as the probe connector 100 on a rotating shaft), the combination of the spiral groove and the spiral collar can maintain a continuous seal with rotation, effectively preventing leakage of liquid or gas. When dealing with the axial extension of the equipment, the spiral structure can have a certain degree of flexibility, like a spring. When the needle 2 extends and retracts within the cavity, the spiral collar can extend and retract accordingly within the spiral groove without compromising the sealing effect.

[0047] In the embodiments of this utility model, please refer to Figure 6 and Figure 7 The inner wall of the needle tube 1 is recessed with a receiving groove 12, and at least a portion of the waterproof ring 3 is embedded in the receiving groove 12. The receiving groove 12 provides a precise positioning space for the waterproof ring 3, allowing the waterproof ring 3 to deform evenly under pressure and fill the microscopic gaps between the inner wall of the needle tube 1 and the contact surface of the needle tip 2. This structure avoids local stress concentration caused by assembly misalignment of the waterproof ring 3, thereby significantly improving the sealing effect. The shape of the receiving groove 12 is not specifically limited; for example, it can be an arc shape or a trapezoidal shape, as long as the shape is compatible with the outer edge of the waterproof ring 3.

[0048] In the embodiments of this utility model, please refer to Figure 2 , Figure 4 , Figure 6 and Figure 7The needle 2 also includes a head 22 that connects to the abutment portion 21. The end of the abutment portion 21 extends beyond the outside of the needle tube 1. A mounting step 20 is formed at the connection between the head 22 and the abutment portion 21. A waterproof ring 3 is embedded in the mounting step 20 and the receiving groove 12. The protruding design of the head 22 increases the contact surface for electrical connection with external devices. For example, when connecting a circuit board in an electronic device, the larger head 22 can better fit with the contact points on the circuit board, reducing contact resistance and improving the stability of signal transmission. For example, the outer diameter of the head 22 is smaller than the outer diameter of the abutment portion 21 so that a mounting step 20 is formed at the connection between the two. The corresponding arrangement of the mounting step 20 and the receiving groove 12 can together form a support space for mounting the waterproof ring 3.

[0049] In the embodiments of this utility model, please refer to Figure 6 and Figure 7 The needle tube 1 has an opening 10 for inserting the needle 2, and the opening 10 communicates with the cavity. The receiving groove 12 is located on the inner side near or away from the opening 10. The location of the receiving groove 12 is not specifically limited. It can be located on the inner wall of the needle tube 1 near the opening 10, and an annular receiving groove 12 can be directly set at the opening 10. A waterproof ring 3 is embedded in the groove. The receiving groove 12 directly strengthens the seal at the connection between the needle 2 and the needle tube 1, and the waterproof ring 3 embedded in the groove prevents external liquid from seeping in. Alternatively, it can be located away from the opening 10 on the needle tube 1, at the bottom of the needle tube 1. The receiving groove 12 forms a second sealing barrier to prevent liquid from penetrating deeper along the inner wall of the needle tube 1.

[0050] In this embodiment of the invention, the waterproof ring 3 is made of an elastic material, such as fluororubber, silicone, or polyurethane, which can adapt to the minute gaps and irregular shapes between the mounting groove 211 and the needle 2. When encountering surface roughness of the mounting groove 211, shape deviation of the needle 2, or slight deformation during equipment operation, the elastic waterproof ring 3 can fill and conform to the surface due to its own elasticity. Furthermore, the elastic waterproof ring 3 can act as a buffer layer, reducing direct wear between the needle 2 and the needle tube 1.

[0051] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 and Figure 4 The probe connector 100 also includes a mounting sleeve 5, which is fitted over the outside of the needle tube 1. The outer periphery of the needle tube 1 has a protrusion 11, which is press-fitted with the inner wall of the mounting sleeve 5. This press-fit between the protrusion 11 and the inner wall of the mounting sleeve 5 makes the needle tube 1 more securely fixed within the mounting sleeve 5. The protrusion 11 can be an extended annular boss, or it can have a groove inside the mounting sleeve 5, the groove matching the shape of the boss, to facilitate accurate installation of the needle tube 1 inside the mounting sleeve 5.

[0052] 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 includes a connecting abutment and a tail, the outer diameter of the abutment is larger than the outer diameter of the tail, and the end of the tail near the abutment and the abutment are both located within the cavity; A waterproof ring is disposed between the outer wall of the needle tip and the inner wall of the needle tube, and is interference-fitted with the cavity wall; and An elastic element is sleeved on the outer periphery of the tail portion, and the two ends of the elastic element abut against the abutting portion and the bottom of the cavity, respectively.

2. The probe-type connector as described in claim 1, characterized in that, The abutment portion is recessed in the circumferential direction with an installation groove, and at least a portion of the waterproof ring is embedded in the installation groove.

3. The probe-type connector as described in claim 2, characterized in that, A recess is formed on the cavity wall of the cavity, a portion of the waterproof ring is interference-fitted with the recess, and the remaining portion of the waterproof ring is interference-fitted with the mounting groove.

4. The probe-type connector as described in claim 3, characterized in that, On the longitudinal section of the abutment portion, the mounting groove is arc-shaped or trapezoidal.

5. The probe-type connector as described in claim 2, characterized in that, The mounting groove is a continuous annular groove; or, the mounting groove is a spiral groove arranged along the axial direction of the abutment portion, and the waterproof ring is a spiral collar.

6. The probe connector as described in claim 1, characterized in that, The inner wall of the needle tube is recessed with a receiving groove, and at least a portion of the waterproof ring is embedded in the receiving groove.

7. The probe connector as described in claim 6, characterized in that, The needle also includes a head connected to the abutment portion, the end of the abutment portion extending outside the needle tube, and an installation step forming at the connection between the head and the abutment portion, with the waterproof ring embedded in the installation step and the receiving groove.

8. The probe connector as described in claim 6, characterized in that, The needle tube has an opening for inserting the needle tip, the opening is in communication with the cavity, and the receiving groove is located on the inner side near or away from the opening.

9. The probe connector as described in any one of claims 1 to 8, characterized in that, The waterproof ring is made of an elastic material.

10. The probe connector as claimed in any one of claims 1 to 8, 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 has a protrusion that is interference-fitted with the inner wall of the mounting sleeve.

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