Waterproof plug

Abstract

The utility model provides a waterproof plug, and relates to the plug technology field, the waterproof plug comprises a male plug and a female plug, the male plug comprises a first housing and a male head inner frame embedded in the first housing, the male head inner frame is provided with a plug pin, the first housing forms a circle of inward inverted buckle along the periphery of the opening end of the male head inner frame, and the first housing is provided with a first through hole. A first plane is formed on the inverted buckle; the female plug comprises a second shell and a female head inner frame fixedly connected with the second shell, the female head inner frame is provided with a jack used for being matched with the plug pin, the outer wall, exposed out of the second shell, of the female head inner frame is provided with a circle of clamping part in a protruding mode, and a second plane is formed on the clamping part; and when the male plug and the female plug are plugged, the clamping part and the inverted buckle are clamped and limited, so that the first plane and the second plane are attached and sealed. Therefore, the problems that an existing waterproof plug is poor in sealing effect and cannot be quickly plugged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plugs, in particular to a waterproof plug. Background Art

[0002] Most of the existing male and female plug sealing structures are to set a seal on the male or female head, and to achieve sealing by pressing or squeezing the seal when the male and female heads are plugged in. However, the plugging force between the male and female heads is limited, and it is easy to have insufficient pressing force, resulting in a decrease in the sealing effect. Therefore, there is a waterproof male and female plug disclosed in Chinese patent CN212304052U, including a male plug and a female plug, the surface of the male plug is sleeved with a male nut, the surface of the male plug and the inner cavity of the male nut are sleeved with a first waterproof rubber pad, the right end of the male plug is fixedly connected with a first limit block, the right side of the first waterproof rubber pad is fixedly connected to the left side of the first limit block, the right side of the first limit block is fixedly connected with a second waterproof rubber pad, the surface of the female plug is sleeved with a female nut, and the surface of the female plug and the inner cavity of the female nut are sleeved with a third waterproof rubber pad. In this scheme, waterproof pads are set on the male plug and the female plug, and fixed by threaded connection to ensure the sealing of the waterproof pads. Among them, although the threaded connection method can ensure the fixation of the male and female heads, the connection process is relatively cumbersome and requires multiple turns of rotation to achieve tightening, which is not convenient for the quick plug-in of the male and female heads. Utility Model Content

[0003] The utility model discloses a waterproof plug, aiming to improve the problems of poor sealing effect and failure of quick plugging of existing waterproof plugs.

[0004] The utility model adopts the following scheme:

[0005] A waterproof plug comprises a male plug and a female plug, wherein the male plug comprises a first shell and a male inner frame embedded in the first shell, a latch is arranged on the male inner frame, the first shell forms a circle of inward buckles along the periphery of the opening end of the male inner frame, and a first plane is formed on the buckles; the female plug comprises a second shell and a female inner frame fixedly connected to the second shell, the female inner frame is provided with a socket for cooperating with the latch, a circle of clamping parts is convexly provided on the outer wall of the female inner frame exposed to the second shell, and a second plane is formed on the clamping parts; when the male plug is plugged into the female plug, the clamping parts and the buckles are engaged and limited, so that the first plane and the second plane are tightly fitted and sealed.

[0006] As a further improvement, the outer walls of the male inner frame and the female inner frame are both arranged in a runway shape.

[0007] As a further improvement, the reverse buckle has a guiding surface that slopes outward along the insertion direction.

[0008] As a further improvement, the inner frame of the male head is convexly provided with a biting portion along its outer wall, and a positioning convex column with a semi-circular cross-section is arranged at one end opposite to the plug pin.

[0009] As a further improvement, a positioning portion is convexly arranged on the outer wall surface of the inner frame of the female head, and the positioning portion and the clamping portion are arranged at intervals to form a clamping groove for accommodating the reverse buckle.

[0010] As a further improvement, anti-slip patterns are convexly arranged on the surfaces of the first shell and the second shell, and an I-shaped net tail is arranged at the wire outlet ends of the two shells.

[0011] As a further improvement, three plug pins are arranged on the inner frame of the male head, namely a positive plug pin, a negative plug pin and an extended plug pin.

[0012] As a further improvement, a positive jack, a negative jack and an extended jack are arranged on the inner frame of the female head corresponding to the inner frame of the male head. The positive jack is arranged in the middle, and the negative jack and the extended jack are arranged on both sides of the positive jack. Among them, the distance between the extended jack and the positive jack is different from the distance between the negative jack and the positive jack.

[0013] As a further improvement, a sealing ring is sleeved on the exposed end of the inner frame of the female head. When the male plug and the female plug are inserted, the end face of the first shell abuts against the sealing ring.

[0014] As a further improvement, a guiding mark for the insertion direction is arranged on the outer surfaces of the first shell and the second shell.

[0015] By adopting the above technical solutions, the following technical effects can be achieved by the utility model:

[0016] 1. When in use, the user inserts the male plug into the female plug, and makes the undercut and the clamping part snap together to fix the male plug and the female plug, and at the same time makes the first plane and the second plane fit tightly and seal, so as to ensure the waterproof performance of the plug during use. When not in use, force is applied to pull the male plug out of the female plug, so that the undercut and the clamping part are separated, and the insertion and removal operations are convenient and quick. Specifically, in the present application, a circle of inward undercuts is set on the first shell, and a circle of clamping parts is set on the outer wall of the female head inner frame, wherein the first plane on the undercut and the second plane on the clamping part are both smoothly set, and a sealing effect can be formed when the two planes fit together. When plugging, the part of the female head inner frame exposed to the second shell extends into the first shell, so that the first plane and the second plane are tightly matched on the outer periphery of the female head inner frame to form a sealing ring, thereby ensuring that the male plug and the female plug are firmly connected while preventing water from entering the connection between the male plug and the female plug.

[0017] 2. The male inner frame is provided with three pins, namely the positive pin, the negative pin and the extension pin. The female inner frame is provided with the positive jack, the negative jack and the extension jack corresponding to the male inner frame. The positive jack is arranged in the center, and the negative jack and the extension jack are arranged on both sides of the positive jack. When the extension pin and the extension jack are plugged in, they can be used to transmit signals to increase the extended functions, such as temperature signal transmission, voltage signal transmission, etc., to meet the use requirements of different scenarios.

[0018] 3. The outer surfaces of the first shell and the second shell are provided with markings indicating the direction of plugging. For example, an arrow is formed on one side of the first shell and the second shell, but not on the other side. When the user plugs in the plug, he or she can turn both the male plug and the female plug over to the side indicated by the arrow and insert them, which can further avoid the situation where the plug is inserted incorrectly.

[0019] 4. The exposed end sleeve of the female head inner frame is provided with a sealing ring. When the male plug and the female plug are plugged in, the end face of the first shell abuts against the sealing ring to further improve the waterproof performance of the plug during the plugging and use process, thereby meeting the requirement of being able to be immersed in water and improving market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of one embodiment of the utility model;

[0022] Figure 2 and Figure 3 It is a cross-sectional view of one embodiment of the utility model along different cross sections;

[0023] Figure 4 is a cross-sectional view of a male plug of one embodiment of the utility model;

[0024] Figure 5 This is a schematic structural diagram of a male plug in one embodiment of the utility model;

[0025] Figure 6 is a cross-sectional view of a female plug of one embodiment of the utility model;

[0026] Figure 7 This is a schematic structural diagram of a female plug in one embodiment of the utility model;

[0027] Figure 8 This is a schematic structural diagram of a male head inner frame in one embodiment of the utility model;

[0028] Figure 9 It is a structural schematic diagram of a female head inner frame in one embodiment of the utility model.

[0029] Icons: 1-male plug; 11-first housing; 111-undercut; 1111-first plane; 1112-guide surface; 112-anti-slip pattern; 113-net tail; 12-male inner frame; 121-bite portion; 122-positioning boss; 123-positive plug; 124-negative plug; 125-extension plug;

[0030] 2-female plug; 21-second shell; 22-female plug inner frame; 221-clamping portion; 2211-second plane; 222-positioning portion; 223-slot; 224-positive electrode jack; 225-negative electrode jack; 226-extension jack. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Example

[0032] Combination Figures 1 to 9 The present embodiment provides a waterproof plug, comprising a male plug 1 and a female plug 2, wherein the male plug 1 comprises a first shell 11 and a male inner frame 12 embedded in the first shell 11, a plug pin is arranged on the male inner frame 12, the first shell 11 forms a circle of inward buckles 111 along the periphery of the opening end of the male inner frame 12, and a first plane 1111 is formed on the buckle 111; the female plug 2 comprises a second shell 21 and a female inner frame 22 fixedly connected to the second shell 21, a plug hole for cooperating with the plug pin is provided on the female inner frame 22, a circle of clamping parts 221 is convexly provided on the outer wall of the female inner frame 22 exposed from the second shell 21, and a second plane is formed on the clamping part 221; when the male plug 1 and the female plug 2 are plugged in, the clamping part 221 and the buckle 111 are engaged and limited, so that the first plane 1111 and the second plane are fitted and sealed.

[0033] It should be mentioned that, in this embodiment, the first shell 11 and the second shell 21 are made of PVC material, and the male head inner frame 12 and the female head inner frame 22 are made of PA material, which are formed by secondary injection molding. When in use, the user inserts the male plug 1 into the female plug 2, and makes the undercut 111 and the clamping portion 221 snap together to achieve the fixation of the male plug 1 and the female plug 2, and at the same time makes the first plane 1111 and the second plane tightly fit and seal, so as to ensure the waterproof performance of the plug during use. When not in use, force is applied to pull the male plug 1 out of the female plug 2, so that the undercut 111 and the clamping portion 221 are separated, and only the insertion and removal operations are convenient and quick. Specifically, in the present application, a circle of inward undercuts 111 is set on the first shell 11, and a circle of clamping portions 221 are set on the outer wall of the female head inner frame 22, wherein the first plane 1111 on the undercut 111 and the second plane on the clamping portion 221 are both smoothly set, and a sealing effect can be formed when the two planes fit together. During plugging, the portion of the female head inner frame 22 exposed outside the second shell 21 extends into the first shell 11, so that the first plane 1111 and the second plane fit tightly together on the outer periphery of the female head inner frame 22 to form a sealing ring, thereby ensuring a firm connection between the male plug 1 and the female plug 2 while preventing water from entering the connection between the male plug 1 and the female plug 2.

[0034] In a preferred embodiment, the outer walls of the male inner frame 12 and the female inner frame 22 are both arranged in a runway shape. The undercut 111 has a guide surface 1112 inclined outwardly along the insertion direction. The clamping portion 221 is arranged as a circle of bosses protruding along the outer wall of the female inner frame 22. The arrangement of the guide surface 1112 can reduce the force when the male plug 1 and the female plug 2 are plugged in, ensuring that the undercut 111 and the clamping portion 221 can be engaged.

[0035] On the basis of the above-mentioned embodiments, in an optional embodiment of the utility model, the male inner frame 12 is provided with a bite portion 121 along its outer wall, and a positioning boss 122 with a semicircular cross section is provided at one end relative to the latch. Exemplarily, the bite portion 121 can be a circle of bosses convexly provided along the male inner frame 12, or can be provided in a tooth shape, or other shapes, so as to strengthen the bite force between the male inner frame 12 and the first shell 11, and prevent the male inner frame 12 from escaping from the first shell 11 during the plugging and unplugging process. The semicircular positioning boss 122 facilitates the positioning and clamping of parts during the injection molding process. In another embodiment, the same bite portion as the male inner frame 12 and the positioning boss with a semicircular cross section can also be provided on the female inner frame 22 to synchronously enhance the bite force between the second inner shell and the female inner frame 22.

[0036] In other embodiments, a positioning portion is protruded on the outer wall surface of the female head inner frame 22, and the positioning portion and the clamping portion 221 are spaced apart to form a clamping groove 223 for accommodating the undercut 111. The positioning portion is embedded in the second shell 21 to increase the bite force with the second shell 21, and the formation of the clamping groove 223 can make the undercut 111 limited along the plugging direction when the male plug 1 and the female plug 2 are plugged in, thereby ensuring that the first plane 1111 and the second plane can be closely fitted.

[0037] Furthermore, in order to facilitate the insertion and removal of the male plug 1 and the female plug 2, anti-slip grooves 112 can be convexly provided on the surfaces of the first shell 11 and the second shell 21, and an I-shaped mesh tail 113 can be provided at the outlet ends of the two shells to prevent the power cord from being broken and enhance the connection strength of the outlet ends.

[0038] On the basis of the above-mentioned embodiment, in an optional embodiment of the utility model, three plugs are provided on the male inner frame 12, namely, a positive plug 123, a negative plug 124 and an extension plug 125. The female inner frame 22 is provided with a positive jack 224, a negative jack 225 and an extension jack 226 corresponding to the male inner frame 12, the positive jack 224 is arranged in the center, the negative jack 225 and the extension jack 226 are arranged on both sides of the positive jack 224, wherein the distance between the extension jack 226 and the positive jack 224 is different from the distance between the negative jack 225 and the positive jack 224. This prevents the negative plug 124 and the extension plug 125 from being plugged in reverse. It should be mentioned that when the extension plug 125 and the extension jack 226 are plugged in, they can be used to transmit signals to increase the extended function, such as temperature signal transmission, voltage signal transmission, etc., to meet the use requirements of different scenarios.

[0039] Preferably, markings indicating the direction of plugging are provided on the outer surfaces of the first shell 11 and the second shell 21. For example, arrows are formed on one side of the first shell 11 and the second shell 21, but not on the other side. When plugging in the plugs, the user turns both the male plug 1 and the female plug 2 over to the side indicated by the arrows, which can further avoid the situation where the plug is inserted incorrectly.

[0040] In other embodiments, the exposed end sleeve of the female head inner frame 22 is provided with a sealing ring. When the male plug 1 and the female plug 2 are plugged in, the end face of the first shell 11 abuts against the sealing ring to further improve the waterproof performance of the plug during the plugging and use process, so as to meet the requirement of being able to be immersed in water and improve market competitiveness. Specifically, the sealing ring is an O-ring, which is sleeved between the clamping portion 221 and the end face of the second shell 21. When the clamping portion 221 is engaged with the undercut 111, the sealing ring is squeezed by the end face of the first shell 11 and the end face of the second shell 21, thereby producing a sealing effect on the two end faces. At the same time, the sealing ring is restricted by the clamping portion 221 and is not easy to slide out of the female head inner frame 22.

[0041] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. Any technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model.

Claims

1. A waterproof plug, characterized in that, Comprising: A male plug, including a first housing and a male inner frame embedded in the male head of the first housing. Plug pins are arranged on the male inner frame. The first housing forms an inwardly turned buckle around the periphery of the open end of the male inner frame, and a first plane is formed on the turned buckle. A female plug, including a second housing and a female inner frame fixedly connected to the second housing. Sockets for mating with the plug pins are provided on the female inner frame. A circumferential clamping portion is convexly provided on the outer wall of the female inner frame exposed outside the second housing, and a second plane is formed on the clamping portion. When the male plug is inserted into the female plug, the clamping portion is clamped and limited with the turned buckle, so that the first plane and the second plane are closely attached and sealed.

2. The waterproof plug according to claim 1, wherein, The outer walls of the male inner frame and the female inner frame are both arranged in a racetrack shape.

3. The waterproof plug according to claim 1, characterized in that, The turned buckle has a guiding surface inclined outward in the insertion direction.

4. The waterproof plug according to claim 1, wherein The male inner frame is convexly provided with a biting portion along its outer wall, and a positioning convex column with a semicircular cross section is provided at one end opposite to the plug pin.

5. The waterproof plug according to claim 1, characterized in that, A positioning portion is convexly provided on the outer wall surface of the female inner frame. The positioning portion and the clamping portion are arranged at intervals to form a card slot for accommodating the turned buckle.

6. The waterproof plug according to claim 1, characterized in that, Anti-slip patterns are convexly provided on the surfaces of the first housing and the second housing, and an I-shaped cable gland is provided at the wire outlet ends of the two housings.

7. The waterproof plug according to claim 1, characterized in that, Three plug pins are arranged on the male inner frame, namely a positive plug pin, a negative plug pin and an extended plug pin.

8. The waterproof plug according to claim 6, wherein The female inner frame is provided with a positive socket, a negative socket and an extended socket corresponding to the male inner frame. The positive socket is arranged in the middle, and the negative socket and the extended socket are arranged on both sides of the positive socket. Among them, the distance between the extended socket and the positive socket is different from the distance between the negative socket and the positive socket.

9. The waterproof plug according to claim 1, wherein, A sealing ring is sleeved on the exposed end of the female inner frame. When the male plug and the female plug are inserted, the end face of the first housing abuts against the sealing ring.

10. The waterproof plug according to claim 1, characterized in that, Direction indicators for guiding the insertion direction are provided on the outer surfaces of the first housing and the second housing.

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