Small-size high-density plugging waterproof push-pull self-locking connector plug

Abstract

The utility model relates to the technical field of connectors, and especially relates to a small-size high-density plugging waterproof push-pull self-locking connector plug. Comprising a first metal shell, a plastic main body which is installed on the first metal shell and encloses a first plugging port, and a terminal group which is embedded in the plastic main body. A first waterproof ring is arranged at the front end of the outer surface of the first metal shell, a self-locking shell is movably mounted on the outer surface of the first metal shell, and the self-locking shell is located on the rear side of the first waterproof ring; a plurality of locking arms are arranged at the front end of the self-locking shell, and locking convex parts are arranged on the outer side surfaces of the locking arms; when the self-locking shell moves forwards along the first metal shell, the plurality of locking arms can be opened outwards to enable the locking convex part to abut against the inner surface of the connector socket. Compared with the prior art, the first waterproof ring can seal the gap between the connector plug and the connector socket, so that the waterproof performance after the connector plug and the connector socket are plugged is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a small-volume, high-density plug-in waterproof push-pull self-locking connector plug. Background Art

[0002] Connectors can bridge the gap between blocked or isolated circuits within a circuit, allowing current to flow and the circuit to achieve its intended function, thereby conducting current and signals and playing the role of connection and transmission. As the application environment of connectors becomes more complex, higher requirements are placed on the high-reliability locking and separation of electrical connector plugs and sockets. If the locking function of the connector in the plugged state cannot be guaranteed, it will directly affect the reliability of the connection effect and even cause the connector to fail to separate.

[0003] Therefore, in the field of connectors, many push-pull self-locking connectors have been derived to improve the connection reliability between the connector plug and the socket. For example, in the multi-point positioning connector announced in the Chinese utility model CN210404156U, the self-locking mechanism is composed of a number of elastic pressing pieces arranged around the inner sleeve. Since the outer diameter of the elastic pressing piece is slightly larger than the socket hole, the elastic pressing piece will be compressed when plugged in, and the elastic pressing piece will be stuck on the inner wall of the socket by its own resilience, forming a self-locking connector.

[0004] However, the inventors discovered during the actual research and development process that this type of self-locking connector will cause many gaps due to the elastic pressing piece provided on the plug housing; once the connector socket and the connector plug are connected, there is still a risk of external liquids, dust and other impurities entering the plug and socket through the gaps and corroding the terminals, and the waterproof performance is very poor.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0006] In view of this, the utility model aims at the deficiencies in the prior art, and its main purpose is to provide a small-volume, high-density plug-in waterproof push-pull self-locking connector plug, which effectively solves the technical defect of poor waterproof performance of the push-pull self-locking connector in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a small-volume, high-density plug-in, waterproof, push-pull, self-locking connector plug, comprising a first metal shell, a plastic body installed on the first metal shell and surrounding a first plug-in interface, and a terminal group embedded in the plastic body; a first waterproof ring is provided at the front end of the outer surface of the first metal shell, and a self-locking shell is movably installed on the outer surface of the first metal shell, and the self-locking shell is located on the rear side of the first waterproof ring; a plurality of locking arms are provided at the front end of the self-locking shell, and a locking protrusion is provided on the outer side of the locking arm; when the self-locking shell moves forward along the first metal shell, the plurality of locking arms can be opened outward to allow the locking protrusion to abut against the inner surface of the connector socket.

[0008] The beneficial effects of the small-volume, high-density plug-in, waterproof, push-pull, and self-locking connector plug provided by the present application are as follows: compared with the prior art, on the one hand, by means of the first waterproof ring provided at the front end of the first metal shell, when the connector plug is inserted into the connector socket, the first waterproof ring can abut against the inner surface of the connector socket, thereby closing the gap between the connector plug and the connector socket, and further improving the waterproof performance of the connector plug and the connector socket after the connection is completed; on the other hand, by movably installing a self-locking shell on the outer surface of the first metal shell, and providing a locking arm on the surface of the self-locking shell, the locking arm can abut against the inner surface of the connector socket by pushing the self-locking shell to move, so as to complete the self-locking operation; there is no need to provide a locking structure on the first metal shell, and no gaps, slits, or other empty spaces will appear in the first metal shell, so as to further improve its waterproof performance.

[0009] As a preferred solution: the outer surface of the first metal shell is provided with a first functional protrusion, the front side surface of the first functional protrusion is inclined and constitutes a first inclined surface, and the first inclined surface is inclined from the inside to the outside and backward; the self-locking shell is provided with a second inclined surface, the second inclined surface is located on the inner side surface between the locking arm and the self-locking shell, and the second inclined surface is inclined from the inside to the outside and backward; when the self-locking shell moves backward, the second inclined surface abuts against the first inclined surface, which can act to retract the front end of the locking arm inward.

[0010] As a preferred solution: the cross-sections of the first metal shell, the first waterproof ring and the self-locking shell are all circular, and a plurality of locking arms are arranged in a circular array at the front end of the self-locking shell; the total thickness of the locking arms and the locking protrusions is less than the thickness of the first waterproof ring, and when the locking arms are not opened, the diameter of the virtual circle formed by the outer surface of the locking protrusions is smaller than the diameter of the first waterproof ring.

[0011] As a preferred solution: the terminal group includes at least four plug-in terminals, and the four plug-in terminals are arranged at four corner intervals and embedded in the plastic body.

[0012] As a preferred solution: the plug-in terminal includes

[0013] The plug-in portion is exposed on the front side of the plastic body and is located in the first plug-in interface;

[0014] An inlay portion, integrally formed at the rear end of the plug-in portion and inlaid in the plastic body;

[0015] The connecting portion is integrally formed at the rear end of the inlay portion and exposed at the rear side of the plastic body.

[0016] As a preferred solution: the inlay portion is provided with a first embedding protrusion and a second embedding protrusion, the first embedding protrusion and the second embedding protrusion are arranged with a front-to-back interval and form a first embedding recess.

[0017] As a preferred solution: also include

[0018] a first supporting shell, covering the outer surface of the plastic body and extending backward; when the plastic body is installed in the first metal shell, the outer surface of the first supporting shell abuts against the inner surface of the first metal shell; and

[0019] The second supporting shell covers the outer surface of the plastic body and extends forward to form a first arc-shaped positioning piece; when the plastic body is installed in the first metal shell, the outer surface of the second supporting shell abuts against the inner surface of the first metal shell.

[0020] As a preferred solution: the second supporting shell is spaced apart from the first supporting shell in front and back and forms a first gap, and the first metal shell is provided with a first glue injection hole, which is directly opposite to the first gap.

[0021] As a preferred solution: a plurality of pressure rings are provided at the rear end of the first metal shell, and a third inclined surface is provided at the rear ends of the plurality of pressure rings; a cap is installed on the rear end of the first metal shell so as to be movable forward and backward, and a fourth inclined surface matching the third inclined surface is provided on the inner surface of the cap; when the cap moves forward, it can cause the rear ends of the plurality of pressure rings to move toward the center. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a small-volume, high-density plug-in waterproof push-pull self-locking connector plug provided by an embodiment of the present application;

[0024] Figure 2 yes Figure 1 A first cross-sectional view of a small-volume, high-density plug-in waterproof push-pull self-locking connector plug shown;

[0025] Figure 3 yes Figure 2A partial enlarged view of the A part of the small volume high density plug-in waterproof push-pull self-locking connector plug shown;

[0026] Figure 4 yes Figure 1 A second cross-sectional view of the plastic body and the terminal group in the small-volume, high-density plug-in waterproof push-pull self-locking connector plug shown;

[0027] Figure 5 yes Figure 2 The enlarged view of the B part of the small-volume, high-density plug-in waterproof push-pull self-locking connector plug is shown.

[0028] Among them, the reference numerals in the figure are:

[0029] 10. Small volume, high density, plug-in, waterproof, push-pull, self-locking connector plug; 101. First plug interface; 11. First metal shell; 111. First waterproof ring; 112. First action convex portion; 113. First inclined surface; 114. First glue injection hole; 115. Pressing ring; 116. Third inclined surface; 117. Cover cap; 118. Fourth inclined surface; 12. Plastic body; 121. First supporting shell; 122. Second supporting shell; 123. First arc-shaped positioning piece; 124. First notch; 13. Terminal group; 131. Plug-in portion; 132. Inlay portion; 1321. First embedded convex portion; 1322. Second embedded convex portion; 1323. First embedded concave portion; 133. Connecting portion; 14. Self-locking shell; 141. Locking arm; 142. Locking convex portion; 143. Second inclined surface. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Please also read Figures 1 to 5 The small-volume, high-density plug-in waterproof push-pull self-locking connector plug provided by the embodiment of the present application is now described. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug 10 includes: a first metal shell 11, a plastic body 12 and a terminal group 13.

[0036] The plastic body 12 is installed in the first metal inner shell and surrounds the first plug interface 101, and the terminal group 13 is embedded in the plastic body 12; a first waterproof ring 111 is provided at the front end of the outer surface of the first metal shell 11, and a self-locking shell 14 is movably installed on the outer surface of the first metal shell 11, and the self-locking shell 14 is located on the rear side of the first waterproof ring 111; a plurality of locking arms 141 are provided at the front end of the self-locking shell 14, and a locking protrusion 142 is provided on the outer side of the locking arm 141; when the self-locking shell 14 moves forward along the first metal shell 11, the plurality of locking arms 141 can be opened outward to allow the locking protrusion 142 to abut against the inner surface of the connector socket.

[0037] Specifically, on the one hand, by means of the first waterproof ring 111 provided at the front end of the first metal shell 11, when the connector plug is inserted into the connector socket, the first waterproof ring 111 can abut against the inner surface of the connector socket, thereby closing the gap between the connector plug and the connector socket, and further improving the waterproof performance of the connector plug and the connector socket after the connection is completed; on the other hand, by movably installing a self-locking shell 14 on the outer surface of the first metal shell 11, a locking arm 141 is provided on the surface of the self-locking shell 14, and by pushing the self-locking shell 14 to move, the locking arm 141 can abut against the inner surface of the connector socket to complete the self-locking operation; there is no need to provide a locking structure on the first metal shell 11, and no gaps, slits or other empty spaces will appear in the first metal shell 11, so as to further improve its waterproof performance.

[0038] In some embodiments of the present application, a first functional protrusion 112 is provided on the outer surface of the first metal shell 11, and the front side surface of the first functional protrusion 112 is inclined and constitutes a first inclined surface 113, and the first inclined surface 113 is inclined backward from the inside to the outside; the self-locking shell 14 is provided with a second inclined surface 143, and the second inclined surface 143 is located on the inner side surface between the locking arm 141 and the self-locking shell 14, and the second inclined surface 143 is inclined backward from the inside to the outside; when the self-locking shell 14 moves backward, the second inclined surface 143 abuts against the first inclined surface 113, which can act to cause the locking arm 141 to retract inward.

[0039] Preferably, the cross-sections of the first metal shell 11, the first waterproof ring 111 and the self-locking shell 14 are all circular, and a plurality of locking arms 141 are arranged in a circular array at the front end of the self-locking shell 14; the total thickness of the locking arms 141 and the locking protrusion 142 is less than the thickness of the first waterproof ring 111, and when the locking arms 141 are not opened, the diameter of the virtual circle formed by the outer surface of the locking protrusion 142 is smaller than the diameter of the first waterproof ring 111.

[0040] Before the small-volume, high-density, waterproof, push-pull, self-locking connector plug provided by the present application is plugged into a connector socket, it is necessary to push the self-locking shell 14 backward to cause the front ends of the multiple locking arms 141 to retract inward; then the connector plug is inserted into the connector socket, and the self-locking shell 14 is released at this time. The elastic force of the multiple locking arms 141 can cause the self-locking shell 14 to move forward, and the front ends of the multiple locking arms 141 can be seen to open outward; when the multiple locking arms 141 are opened outward, the locking protrusion 142 can be buckled into the locking groove of the connector socket to complete the locking of the connector plug and the connector socket.

[0041] In some embodiments of the present application, the terminal group 13 includes at least four plug-in terminals, which are arranged at four-corner intervals and embedded in the plastic body 12. The plug-in terminal includes a plug-in portion 131, an embedding portion 132, and a connecting portion 133. The plug-in portion 131 is exposed at the front side of the plastic body 12 and is located in the first plug interface 101; the embedding portion 132 is integrally formed at the rear end of the plug-in portion 131 and embedded in the plastic body 12; the connecting portion 133 is integrally formed at the rear end of the embedding portion 132 and exposed at the rear side of the plastic body 12. By setting the terminal group 13 with four-point intervals, it is possible to ensure that a plurality of plug-in terminals can be accommodated in a small-sized plastic body 12.

[0042] Specifically, the embedding portion 132 is provided with a first embedding protrusion 1321 and a second embedding protrusion 1322, and the first embedding protrusion 1321 and the second embedding protrusion 1322 are arranged in a front-to-back manner and form a first embedding recess 1323. Such a structure can enhance the connection strength between the plug-in terminal and the plastic body 12, and the plug-in terminal is not easy to be separated from the plastic body 12 due to multiple plugging and unplugging, thereby further extending the service life of the connector plug or the connector socket.

[0043] In some other embodiments of the present application, a first supporting shell 121 and a second supporting shell 122 are further included. The first supporting shell 121 is coated on the outer surface of the plastic body 12 and extends backward. When the plastic body 12 is loaded into the first metal shell 11, the outer surface of the first supporting shell 121 abuts against the inner surface of the first metal shell 11. The second supporting shell 122 is coated on the outer surface of the plastic body 12 and extends forward to form a first arc-shaped positioning piece 123. When the plastic body 12 is loaded into the first metal shell 11, the outer surface of the second supporting shell 122 abuts against the inner surface of the first metal shell 11.

[0044] It should be noted that the first arc-shaped positioning piece 123 is required to be matched with the positioning piece in the connector socket to prevent mis-insertion.

[0045] Specifically, the second support shell 122 and the first support shell 121 are arranged at a front-to-back spacing and form a first notch 124, and the first metal shell 11 is provided with a first glue injection hole 114, and the first glue injection hole 114 is directly opposite to the first notch 124. The first support shell 121 and the second support shell 122 can provide effective support force for the plastic body 12, so that the plastic body 12 is not easily squeezed during assembly, thereby improving the convenience and reliability of the assembly of the plastic body 12, and also improving the production yield; furthermore, the first support shell 121 and the second support shell 122 are cleverly arranged to form the first notch 124, and the hot melt slurry is injected into the first notch 124. After the hot melt slurry is cooled, the position of the plastic body 12 can be limited, which can improve the reliability of assembly and improve the waterproof performance compared to the traditional snap-fit ​​assembly.

[0046] In other embodiments of the present application, a plurality of pressure rings 115 are provided at the rear end of the first metal shell 11, and a third inclined surface 116 is provided at the rear ends of the plurality of pressure rings 115; a cap 117 is installed at the rear end of the first metal shell 11 so as to be movable forward and backward, and a fourth inclined surface 118 matching the third inclined surface 116 is provided on the inner surface of the cap 117; when the cap 117 moves forward, it can cause the rear ends of the plurality of pressure rings 115 to move toward the center.

[0047] Specifically, when the wire harness is inserted into the first metal shell 11 and connected to the terminal group 13, the cap 117 can be pushed forward to move the rear ends of the plurality of pressing rings 115 toward the center to clamp the wire harness and ensure that the wire harness is not easily dropped off.

[0048] It should be noted that a buckling structure (not shown) is provided between the end of the first metal shell 11 and the cap 117 to ensure that when the cap 117 moves forward, it can be fixed by the buckling structure and can continuously act on multiple pressure rings 115 to clamp the wiring harness.

[0049] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A small-volume, high-density plug-in waterproof push-pull self-locking connector plug, comprising a first metal shell (11), a plastic body (12) mounted on the first metal shell (11) and surrounding a first plug interface (101), and a terminal group (13) embedded in the plastic body (12); Features: A first waterproof ring (111) is provided at the front end of the outer surface of the first metal shell (11), and a self-locking shell (14) is movably installed on the outer surface of the first metal shell (11), and the self-locking shell (14) is located at the rear side of the first waterproof ring (111); a plurality of locking arms (141) are provided at the front end of the self-locking shell (14), and a locking protrusion (142) is provided on the outer side surface of the locking arm (141); when the self-locking shell (14) moves forward along the first metal shell (11), the plurality of locking arms (141) can be opened outwards so that the locking protrusion (142) abuts against the inner surface of the connector socket.

2. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 1, characterized in that: The outer surface of the first metal shell (11) is provided with a first functional protrusion (112), the front side surface of the first functional protrusion (112) is inclined and forms a first inclined surface (113), and the first inclined surface (113) is inclined from the inside to the outside and backward; The self-locking shell (14) is provided with a second inclined surface (143), the second inclined surface (143) is located on the inner side surface between the locking arm (141) and the self-locking shell (14), and the second inclined surface (143) is arranged to be inclined backward from the inside to the outside; When the self-locking shell (14) moves backward, the second inclined surface (143) abuts against the first inclined surface (113), which can cause the front end of the locking arm (141) to retract inward.

3. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 1 or 2, characterized in that: The cross-sections of the first metal shell (11), the first waterproof ring (111) and the self-locking shell (14) are all circular, and the plurality of locking arms (141) are arranged in an annular array at the front end of the self-locking shell (14); The combined thickness of the locking arm (141) and the locking protrusion (142) is smaller than the thickness of the first waterproof ring (111); when the locking arm (141) is not opened, the diameter of the virtual circle formed by the outer surface of the locking protrusion (142) is smaller than the diameter of the first waterproof ring (111).

4. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 1, characterized in that: The terminal group (13) comprises at least four plug-in terminals, which are arranged at four-corner intervals and embedded in the plastic body (12).

5. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 4, characterized in that: The plug terminal comprises A plug-in portion (131), the plug-in portion (131) is exposed on the front side of the plastic body (12) and is located in the first plug-in port (101); An inlay portion (132) is integrally formed at the rear end of the plug-in portion (131) and inlaid in the plastic body (12); The connecting portion (133) is integrally formed at the rear end of the inlay portion (132) and exposed at the rear side of the plastic body (12).

6. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 5, characterized in that: The inlay portion (132) is provided with a first embedding protrusion (1321) and a second embedding protrusion (1322); the first embedding protrusion (1321) and the second embedding protrusion (1322) are arranged at a front-to-back interval and form a first embedding recess (1323).

7. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to any one of claims 4 to 6, characterized in that: Also includes a first supporting shell (121) covering the outer surface of the plastic body (12) and extending backward; when the plastic body (12) is inserted into the first metal shell (11), the outer surface of the first supporting shell (121) abuts against the inner surface of the first metal shell (11); and The second support shell (122) is coated on the outer surface of the plastic body (12) and extends forward to form a first arc-shaped positioning piece (123); when the plastic body (12) is inserted into the first metal shell (11), the outer surface of the second support shell (122) abuts against the inner surface of the first metal shell (11).

8. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 7, characterized in that: The second support shell (122) and the first support shell (121) are arranged at a front-to-rear spacing to form a first notch (124); the first metal shell (11) is provided with a first glue injection hole (114), and the first glue injection hole (114) is directly opposite to the first notch (124).

9. The small-volume, high-density plug-in waterproof push-pull self-locking connector plug according to claim 1, characterized in that: The first metal shell (11) is provided with a plurality of pressure rings (115) at the rear end, and the plurality of pressure rings (115) are provided with a third inclined surface (116) at the rear end; A cover cap (117) is installed at the rear end of the first metal shell (11) so as to be movable forward and backward, and a fourth inclined surface (118) adapted to the third inclined surface (116) is provided on the inner surface of the cover cap (117); When the cover cap (117) moves forward, it can cause the rear ends of the plurality of pressure rings (115) to move toward the center.

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