Plugging-resistant waterproof male and female connector
By combining the male end plug boss and the female end insulator with a sealing ring and spring, the problem of the waterproof connector not being waterproof in the non-interlocking state is solved. This achieves a simple and convenient waterproof and electrical connection, suitable for various scenarios.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGGUAN LINJVE IND INVESTMENTS
- Filing Date
- 2026-02-10
- Publication Date
- 2026-04-10
AI Technical Summary
Existing mating and unmating waterproof connectors are not waterproof on the female end when not mated, and they are complex in structure, take up a lot of space, and are inconvenient to use. They are especially costly in the case of multiple terminals or probes, and have limited applicability.
The design employs a male connector with a mating boss and a female connector with an insulator, combined with a sealing ring and spring structure, to achieve a tight connection of the waterproof cap in the non-interlocking state, and to achieve electrical connection and locking in the interlocking state through a spring clip snap-fit structure.
It achieves good waterproof performance for the female connector in both mating and non-mating states. It has a simple structure, small size, easy operation, and wide applicability, avoiding the use of external waterproof caps and complex locking structures.
Smart Images
Figure CN121840261A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of waterproof connectors, in particular to a plug-resistant waterproof connector. BACKGROUND
[0002] The existing plug-resistant waterproof connector only realizes waterproof in the male-female plug-in state, and the female connector is not waterproof in the non-plug-in state. To solve the problem of the female connector not being waterproof in the non-plug-in state, the conventional solution is to add a waterproof cap or a waterproof plug to the female connector, and then remove them when plugging is needed. However, the added waterproof cap or waterproof plug is prone to loss, occupies space when not in use, and requires users to develop the operation habit of using the waterproof cap or waterproof plug.
[0003] In addition, the male and female connectors of the plug-resistant waterproof connector are generally fixed again by a sleeve on the female or male housing after plugging. The sleeve threadedly connects the male and female connectors to achieve locking. Or the male and female connectors are locked by a plastic snap structure. Both methods require the volume of the connector housing to be occupied, and the components are exposed to the outside, which is unreliable for long-term use and is easily affected by external components.
[0004] Some waterproof connectors with movable doors or movable blocks achieve closure of the plug opening by spring driving the movable doors or movable blocks. The movable doors or movable blocks are pushed away when the male connector is inserted. The male connector of such a connector adopts a terminal or probe structure. Due to performance requirements and cost constraints, the diameter of the terminal or probe is generally not too large, and existing terminals or probes are purchased to reduce costs. Due to the small diameter of the terminal or probe, it is difficult to plug in, especially when multiple terminals or probes are required for the connector. Manufacturers generally add a guide structure to achieve this. Since the movable door or movable block needs to move up and down or left and right, it occupies a large volume of the female connector. Extending the flange on the plug opening and adding a guide hole will result in an excessively large volume of the female connector. This problem can be solved by forming a guide structure on the terminal or probe, but the cost is high. At the same time, the guide flange or groove on the terminal or probe will affect the arrangement of the spring or sleeve in the female connector, ultimately resulting in a complex structure of the female connector. At the same time, the applicable scenarios are small.
[0005] Therefore, there is an urgent need for a plug-resistant waterproof connector that can solve one or more of the above problems. SUMMARY
[0006] To address one or more problems existing in the prior art, the present invention provides a mating-resistant and waterproof connector. The technical solution adopted by the present invention to solve the above problems is: a mating-resistant and waterproof connector, the connector comprising: a male connector and a female connector, the male connector being provided with a mating boss, a plurality of first mating springs being mounted on the surface of the mating boss, the first mating springs forming a first snap-fit flange, and a male end guide surface being formed on the side of the mating boss; The female connector is provided with a base, insulator and spring are installed in the base, the insulator has multiple slots, the slots are connected to the openings of the inner sidewall of the insulator, a second mating spring is installed in the slot, the second mating spring is provided with a second snap-fit flange that engages with the first mating spring, a waterproof cap is installed in the inner hole of the insulator, the spring pushes the waterproof cap outward, and the travel of the insulator and / or the base limits the waterproof cap; A sealing ring is installed at the opening of the base. The sealing ring is connected to the insulator. The inner hole of the sealing ring is provided with a first guide surface. The inner hole of the insulator is provided with a third guide surface. The first guide surface, the third guide surface and the male end guide surface cooperate to achieve guidance. In the non-interlocking state, the waterproof cap is tightly connected to the inner hole of the sealing ring. In the interlocking state, the waterproof cap is pushed into the insulator by the insertion boss, the interface of the male connector is sealed to the interface of the sealing ring, and the second snap-fit flange passes through the opening of the inner hole sidewall of the insulator and snaps into the first snap-fit flange.
[0007] In some embodiments, the first mating spring is circumferentially arranged on the surface of the insertion boss, the first mating spring is embedded in the surface of the insertion boss, and the opening of the inner hole sidewall of the insulator is circumferentially arranged on the inner hole sidewall of the insulator.
[0008] In some embodiments, the interface of the male connector is provided with a mating flange, which surrounds the insertion boss. In the mating state, the mating flange is sealed to the interface of the sealing ring.
[0009] In some embodiments, the waterproof cap has a second guide surface on its side, and the second guide surface is connected to the third guide surface.
[0010] In some embodiments, the lower end of the waterproof cap is provided with a first travel limiting step, and the inner hole sidewall of the insulator is provided with a second travel limiting step that engages with the first travel limiting step.
[0011] In some embodiments, the upper interface of the insulator is provided with a mounting flange, which is interference-fitted with the sealing ring.
[0012] In some embodiments, the base is provided with a first limiting step, which engages with the insulator.
[0013] In some embodiments, the base is provided with a guide post, which is inserted into the insertion hole at the lower end of the waterproof cap, or the waterproof cap is inserted into the guide post; the spring is disposed between the guide post and the waterproof cap.
[0014] Furthermore, when the guide post is inserted into the insertion hole at the lower end of the waterproof cap, one end of the spring is located in the inner hole of the guide post, and the other end of the spring is located in the insertion hole at the lower end of the waterproof cap, and the waterproof cap is guided by the guide post.
[0015] Furthermore, the waterproof cap is limited in travel by the guide post.
[0016] The technical effects achieved by this invention are: the female connector can achieve good waterproof performance in both mating and non-mating states. In the non-mating state, the female connector can achieve waterproofing without external waterproof caps / plugs or any operation, and the overall structure is simple and small in size. When mating, the male connector is directly inserted into the female connector, and waterproofing and electrical connection can be achieved by the interface of the two, which is simple and convenient to operate. The electrical connection between the female and male connectors is achieved through spring contacts. The guiding insertion is achieved through the insertion boss and the inner hole of the insulator of the female connector. It is easy to achieve guiding alignment during insertion. It is more practical and convenient than the existing terminal structure. The locking structure formed by the spring contacts achieves locking, so that the female and male connectors fit tightly and avoid springback. There is no need to set up a plastic hook structure or an external locking sleeve for the threaded connection of the male and female ends. The overall structure is simpler. At the same time, the spring contacts can be arranged circumferentially, making it applicable to a wider range of scenarios. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the male connector and the female connector of the present invention; Figure 2 This is a schematic diagram of the male connector of the present invention; Figure 3 This is a schematic diagram of the female connector of the present invention; Figure 4 This is an internal view of the female connector of the present invention; Figure 5 This is a cross-sectional view of the female connector of the present invention; Figure 6 This is a cross-sectional view of the connector of the present invention in the mating state.
[0018] In the diagram, 1 is the male connector; 10 is the mating boss; 100 is the male guide surface; 11 is the first mating spring; 110 is the first snap-fit flange; 12 is the mating flange; 2 is the female connector; 20 is the base; 200 is the first limiting step; 201 is the guide post; 21 is the sealing ring; 210 is the first guide surface; 22 is the waterproof cap; 220 is the first travel limiting step; 221 is the second guide surface; 23 is the second mating spring; 230 is the second snap-fit flange; 24 is the insulator; 240 is the slot; 241 is the mounting flange; 242 is the second travel limiting step; 243 is the third guide surface; and 25 is the spring. Detailed Implementation
[0019] To make the above-mentioned objects, features, and advantages of the present invention more readily understood, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0020] This invention discloses a waterproof connector that is resistant to mating and pulling, such as... Figure 1 , Figure 2 As shown, the connector includes a male connector 1 and a female connector 2. The male connector 1 is provided with a mating boss 10. A plurality of first mating springs 11 are mounted on the surface of the mating boss 10. The first mating springs 11 form a first snap-fit flange 110. The side of the mating boss 10 forms a male end guide surface 100. Combination Figures 3-5 As shown, the female connector 2 is provided with a base 20, insulator 24 and spring 25 are installed in the base 20, the insulator 24 forms a plurality of slots 240, the slots 240 communicate with the openings of the inner sidewall of the insulator 24, a second mating spring 23 is installed in the slots 24, the second mating spring 23 is provided with a second snap-fit flange 230 that snaps with the first mating spring 11, a waterproof cap 22 is installed in the inner hole of the insulator 24, the spring 25 pushes the waterproof cap 22 outward, and the travel of the insulator 24 and / or the base 20 limits the waterproof cap 22; Combination Figures 3-5 As shown, a sealing ring 21 is installed at the opening of the base 20. The sealing ring 21 is connected to the insulator 24. The sealing ring 21 seals the interface of the female connector 2. The inner hole of the sealing ring 21 is provided with a first guide surface 210, and the inner hole of the insulator 24 is provided with a third guide surface 243. The first guide surface 210, the third guide surface 243 and the male guide surface 100 cooperate to achieve guidance. Combination Figure 5 As shown, in the non-interlocking state, the waterproof cap 22 is tightly connected to the inner hole of the sealing ring 21, and the waterproof cap 22 squeezes the inner hole of the sealing ring 21 to achieve waterproofing; Combination Figure 6 As shown, in the plug-in state, the waterproof cap 22 is pushed into the insulator 24 by the plug-in boss 10, the interface of the male connector 1 is sealed to the interface of the sealing ring 21, and the plug-in boss 10 squeezes the inner hole of the sealing ring 21 to achieve waterproofing. The second snap-fit flange 230 passes through the opening in the inner sidewall of the insulator 24 and snaps into the first snap-fit flange 110, thereby achieving a tight fit between the female connector 2 and the male connector 1. This tight fit, combined with the compression fit between the sealing ring 21 and the insertion boss 10, ensures that the male connector 1 has sufficient holding force within the female connector 2, preventing springback and loosening.
[0021] It should be noted that, in combination Figure 5 As shown, the slot 240 is used to arrange the second mating spring 23. The slot 240 allows for the elastic deformation of the second snap-fit flange 230, which facilitates the smooth engagement of the first snap-fit flange 110 and the second snap-fit flange 230. At the same time, it makes the gap between the insulator 24, the waterproof cap 22, and the insertion boss 10 smaller, so that the vertical guiding movement of the waterproof cap 22 is smoother, the mating guidance of the insertion boss 10 and the insulator 24 is smoother, and the snap-fit of the first mating spring 11 and the second mating spring 23 is more reliable, thus improving the waterproof performance. Compared with the springs being directly set on the inner sidewall of the insulator 24, the possibility of jamming during the mating of the springs is avoided.
[0022] Furthermore, the introduction of the insulator 24 not only improves insulation performance but also provides a reliable structure for subsequent adaptation to rotary switches. The rotatable insulator 24 enables the male and female connectors to rotate after mating. The pins of the spring piece inside the insulator 24 are electrically connected to the external circuit through a conductive ring. The conductive ring structure is a conventional technology and therefore will not be described in detail here.
[0023] It should be noted that the inner hole and outer wall of the sealing ring 21 are both provided with annular flanges to improve sealing performance. The second mating spring 23 in the female connector 2 can be electrically connected to the outside world by DIP welding or by wire bonding.
[0024] Combination Figure 1 , Figure 2As shown, the first mating spring 11 is circumferentially arranged on the surface of the plug-in boss 10 and is embedded in the surface of the plug-in boss 10. The opening of the inner hole sidewall of the insulator 24 is circumferentially arranged on the inner hole sidewall of the insulator 24. The second mating spring 23 is also circumferentially arranged inside the insulator 24. Under the condition of ensuring reliable and stable mating of the connector, it can adapt to a variety of usage scenarios.
[0025] Combination Figure 6 As shown, when the male connector 1 and the female connector 2 are mated and plugged in, the plugging boss 10 guides the male connector 1 into the openings of the sealing ring 21 and the insulator 24, so that the first mating spring 11 and the second mating spring 23 can be engaged and electrically connected after the male connector 1 is guided and inserted, thus ensuring the stability and reliability of the mating.
[0026] Specifically, in combination Figure 2 As shown, the male connector 1 has a mating flange 12 at its interface. The mating flange 12 surrounds the insertion boss 10. In the mating state, the mating flange 12 is sealed to the interface of the sealing ring 21. The mating flange 12 is a flange with its ends connected, and it can be annular. By setting the mating flange 12, the waterproof performance is enhanced, and moisture is further prevented from entering the gap of the male and female connectors from the interface of the mating end.
[0027] Specifically, in combination Figures 3-6 As shown, the waterproof cap 22 has a second guide surface 221 on its side. The second guide surface 221 is connected to the third guide surface 243 to ensure that the compression and rebound of the waterproof cap 22 are smooth and reliable, and to avoid jamming or stuck situations.
[0028] When the insulator 24 limits the travel of the waterproof cap 22, in combination with Figure 5 As shown, the lower end of the waterproof cap 22 is provided with a first travel limiting step 220, and the inner sidewall of the insulator 24 is provided with a second travel limiting step 242 that engages with the first travel limiting step 220. Similarly, the base 20 may also be provided with limiting steps to limit the travel of the waterproof cap 22.
[0029] Furthermore, combining Figure 5 As shown, the upper interface of the insulator 24 is provided with a mounting flange 241, which is interference-fitted with the sealing ring 21 to ensure that the sealing ring 21 is reliably and firmly fixed on the insulator 24. The base 20 is provided with a first limiting step 200, which engages with the insulator 24 to prevent displacement or positional shift of the insulator 24 during use of the connector.
[0030] Specifically, in combination Figures 5-6 As shown, the base 20 is provided with a guide post 201, which is inserted into the insertion hole at the lower end of the waterproof cap 22, or the waterproof cap 22 is inserted into the guide post 201; the spring 25 is provided between the guide post 201 and the waterproof cap 22; by providing the guide post 201, the guidance of the waterproof cap 22 is strengthened, and the top end of the waterproof cap 22 is prevented from getting dry with the inner hole of the insulator 24, while the spring 25 is limited and fixed. When the guide post 201 is inserted into the insertion hole at the lower end of the waterproof cap 22, one end of the spring 25 is located in the inner hole of the guide post 201, and the other end of the spring 25 is located in the insertion hole at the lower end of the waterproof cap 22. The waterproof cap 22 is guided by the guide post 201. The inner hole of the guide post 201 and the insertion hole of the waterproof cap 22 are used to accommodate and limit the spring 25, thereby achieving a better guiding effect and reducing the volume of the female connector 2. It also avoids the spring 25 from getting stuck with the second mating spring 23. In addition, when the waterproof cap 22 is inserted into the guide post 201, the two ends of the spring 25 are respectively located in the inner hole of the guide post 201 and the insertion hole at the lower end of the waterproof cap 22. The above two insertion methods can be selected according to actual needs.
[0031] When the waterproof cap 22 is limited in travel by the base 20, the base 20 provides the guide post 201, which limits the travel of the waterproof cap 22. The limiting structure can also be a stepped structure. In the above-mentioned guide structure, the first, second, and third guide surfaces and the male end guide surface can form a D-shaped guide structure.
[0032] In summary, this application achieves good waterproof performance for the female connector in both mating and non-mating states. In the non-mating state, the female connector achieves waterproofing without the need for an external waterproof cap / plug or any operation, resulting in a simple overall structure and small size. When mating, the male connector is directly inserted into the female connector, and waterproofing and electrical connection are achieved simply by connecting the interfaces, making the operation simple and convenient. The electrical connection between the female and male connectors is achieved through spring contacts. The guiding insertion is achieved through the insertion boss and the inner hole of the insulator of the female connector. It is easy to achieve guiding alignment during insertion. It is more practical and convenient than the existing terminal structure. The locking structure formed by the spring contacts achieves locking, so that the female and male connectors fit tightly and avoid springback. There is no need to set up a plastic hook structure or an external locking sleeve for the threaded connection of the male and female ends. The overall structure is simpler. At the same time, the spring contacts can be arranged circumferentially, making it applicable to a wider range of scenarios.
[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.
[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.
[0035] The embodiments described above are merely illustrative of one or more implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.
Claims
1. A waterproof connector resistant to mating and pulling, characterized in that, The connector includes a male connector and a female connector. The male connector is provided with a mating boss. A plurality of first mating springs are mounted on the surface of the mating boss. The first mating springs form a first snap-fit flange. A male guide surface is formed on the side of the mating boss. The female connector is provided with a base, insulator and spring are installed in the base, the insulator has multiple slots, the slots are connected to the openings of the inner sidewall of the insulator, a second mating spring is installed in the slot, the second mating spring is provided with a second snap-fit flange that engages with the first mating spring, a waterproof cap is installed in the inner hole of the insulator, the spring pushes the waterproof cap outward, and the travel of the insulator and / or the base limits the waterproof cap; A sealing ring is installed at the opening of the base. The sealing ring is connected to the insulator. The inner hole of the sealing ring is provided with a first guide surface. The inner hole of the insulator is provided with a third guide surface. The first guide surface, the third guide surface and the male end guide surface cooperate to achieve guidance. In the non-interlocking state, the waterproof cap is tightly connected to the inner hole of the sealing ring. In the interlocking state, the waterproof cap is pushed into the insulator by the insertion boss, the interface of the male connector is sealed to the interface of the sealing ring, and the second snap-fit flange passes through the opening of the inner hole sidewall of the insulator and snaps into the first snap-fit flange.
2. The waterproof connector resistant to mating and pulling according to claim 1, characterized in that, The first mating spring is circumferentially arranged on the surface of the plug-in boss, and the first mating spring is embedded in the surface of the plug-in boss. The opening of the inner hole sidewall of the insulator is circumferentially arranged on the inner hole sidewall of the insulator.
3. The waterproof connector resistant to mating and unmolding according to claim 1, characterized in that, The male connector has a mating flange at its interface, which surrounds the insertion boss. In the mating state, the mating flange is sealed to the interface of the sealing ring.
4. The waterproof connector resistant to mating and pulling according to claim 1, characterized in that, The waterproof cap has a second guide surface on its side, which is connected to the third guide surface.
5. The waterproof connector resistant to mating and pulling according to claim 1, characterized in that, The lower end of the waterproof cap is provided with a first travel limiting step, and the inner sidewall of the insulator is provided with a second travel limiting step that engages with the first travel limiting step.
6. The waterproof connector resistant to mating and pulling according to claim 1, characterized in that, The upper interface of the insulator is provided with a mounting flange, which is interference-fitted with the sealing ring.
7. The waterproof connector resistant to mating and pulling according to claim 1, characterized in that, The base is provided with a first limiting step, which engages with the insulator.
8. The waterproof connector resistant to mating and pulling according to claim 1, characterized in that, The base is provided with a guide post, which is inserted into the hole at the lower end of the waterproof cap, or the waterproof cap is inserted into the guide post; the spring is provided between the guide post and the waterproof cap.
9. The waterproof connector resistant to mating and pulling according to claim 8, characterized in that, When the guide post is inserted into the insertion hole at the lower end of the waterproof cap, one end of the spring is located in the inner hole of the guide post, and the other end of the spring is located in the insertion hole at the lower end of the waterproof cap, and the waterproof cap is guided by the guide post.
10. The waterproof connector resistant to mating and pulling according to claim 8, characterized in that, The waterproof cap is limited in its travel by the guide post.