Low-voltage waterproof connector plug for automobile

Abstract

This utility model discloses a low-voltage waterproof connector plug for automobiles, including a housing and a waterproof ring fitted onto the housing. The housing comprises an integrally injection-molded outer shell, an inner shell, and an extension shell. The outer shell has an undercut and an annular groove, within which the waterproof ring is fitted. The inner shell is located inside the outer shell and connected to it via a connecting plate. The extension shell and the inner shell are connected and pass through each other. The extension shell has a limiting opening and a first elastic arm, one end of which is elastically engaged within the limiting opening. This device features an integrated structural design, with the external waterproof ring ensuring airtightness, and the internal components facilitating installation and mating operations.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronic connector design technology, and in particular to a low-voltage waterproof connector plug for automobiles. Background Technology

[0002] Automotive connectors are commonly used electronic components in automobiles, primarily functioning to maintain the flow of current between electronic parts, enabling circuits to perform their intended functions. With the rapid development of the automotive industry, various functional components and parts in automobiles are constantly evolving towards intelligence, refinement, and reliability, placing higher demands on the structural design, appearance design, and materials of automotive connectors. Vehicle safety is therefore of paramount importance. Currently, many automotive connectors suffer from electrical faults such as poor cable contact, as well as issues with waterproofing and insulation.

[0003] In the prior art, patent CN210806152U discloses a low-voltage waterproof connector plug for automobiles, including a plastic shell with an outer waterproof ring fixedly fitted on one side of the shell. It also includes an embedded plastic piece with a side inverted buckle. The plastic shell has a slot inside that mates with the side inverted buckle. The embedded plastic piece and the plastic shell are fixedly connected through the engagement of the side inverted buckle and the slot. By using an outer waterproof ring on the outside of the plastic shell and an inner waterproof ring inside, airtightness is ensured, effectively preventing oxidation and corrosion of electronic components by moisture, achieving a waterproof rating of 1P69. The elastic inverted buckle structure on both sides of the plastic shell simplifies the feasibility of plugging and unplugging the product and effectively prevents components from detaching during high-speed vehicle vibrations. The excellent waterproof and high / low temperature resistant insulation materials also ensure the safety of the circuit.

[0004] Patent CN216055411U discloses a low-voltage waterproof connector, relating to the technical field of compressor controller systems for new energy vehicles. The connector is mounted on the compressor controller. The connector includes a housing and pins. The upper end of the housing has a connector interface. The end of the housing away from the connector interface has a potting groove. The pins are integrally injection molded with the housing, and each pin consists of a front section, a connecting section, and a tail section. The front section of the pin extends into the connector interface. The connecting section of the pin is injection molded to the housing. The tail section of the pin passes through the potting groove and extends into the interior of the compressor controller. The potting groove is filled with sealant. The connecting section of the pin has an anti-pin-detachment structure. This invention uses injection molding and an anti-pin-detachment structure, allowing for repeated welding and repair without the pins loosening or falling off, thus not affecting the connector's airtightness and waterproof performance. The waterproof performance reaches IP67. The connector has high pin pull-out force and a wide range of applications.

[0005] In order to solve one of the above problems, this application provides a low-voltage waterproof connector plug for automobiles. Utility Model Content

[0006] The purpose of this utility model is to solve the problems existing in the prior art, and to propose a low-voltage waterproof connector plug for automobiles. It adopts an integrated structural design, with an external waterproof ring to ensure airtightness, and internally facilitates the installation of electronic components and the insertion and mating operation.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a low-voltage waterproof connector plug for automobiles, comprising a housing and a waterproof ring fitted on the housing. The housing includes an integrally injection-molded outer shell, an inner shell, and an extension shell. The outer shell has an undercut and an annular groove. The undercut adopts an elastic structure, which simplifies the insertion and mating operation of the connector plug and effectively prevents components from falling off during high-speed vehicle vibration. The waterproof ring is fitted inside the annular groove, and the installation of the waterproof ring is simple. The inner shell is located inside the outer shell and is connected to the outer shell through a connecting plate. The extension shell and the inner shell are connected and have a limiting port and a first elastic arm. One end of the first elastic arm is elastically locked in the limiting port. The first elastic arm extends into the limiting port and elastically limits the movement, which can limit and lock the components that cooperate with the extension shell, preventing them from falling off.

[0008] Furthermore, as described above, the buckle is located on one open end of the outer shell. There are two buckles arranged symmetrically. The shape of the buckle is matched with the component that is inserted into it. The buckle adopts an elastic structure design and is integrally injection molded with the outer shell.

[0009] Furthermore, as described above, the annular groove is located at the other opening end of the outer shell and is suspended outside the mounting in the middle of the inner shell. That is, the position of the annular groove is designed at the opening end of the outer shell, and the projected position of the annular groove is in the middle of the inner shell.

[0010] Furthermore, as described above, the annular groove is formed by two annular pieces extending outward from the outer shell in the circumferential direction. That is, the annular groove is an open groove formed by the outer shell and the two annular pieces, and the annular pieces are integrally injection molded with the outer shell.

[0011] Furthermore, as described above, the outer surface of the inner shell is provided with a locking protrusion, and the inner wall of the inner shell is provided with an inner locking component. The locking protrusion and the inner locking component are located on both sides of the connecting plate, and their positions are designed according to actual needs.

[0012] Furthermore, as described above, the two sides of the locking protrusion are provided with reinforcing ribs to increase the structural strength. The inner locking component extends from the plane where the connecting plate is located to the opening end of the inner shell to provide installation space and assembly structure for electronic devices.

[0013] Furthermore, as described above, the housing is also provided with side through holes, which are located on the symmetrical axis of the two inverted buckles and are positioned opposite to the locking protrusions to facilitate overall assembly operations.

[0014] Furthermore, as mentioned above, multiple stiffening plates connect the inner shell and the outer shell to increase the structural strength between them. The stiffening plates are also connected to the connecting plate. By optimizing the design of the stiffening plates, they are vertically connected to the connecting plate, avoiding the need for side core pulling when opening holes on the side of the stiffening plates. This satisfies the design requirements of the one-piece injection molding of the inner shell and the outer shell, simplifies the injection mold structure as much as possible, and reduces the difficulty of mold opening and manufacturing costs.

[0015] Furthermore, as described above, the first elastic arm is located at the connection between the extension shell and the inner shell, and the main body of the first elastic arm is located outside the extension shell. The first elastic arm is integrally injection molded with the extension shell and the inner shell. It is a component used to limit or lock the assembly with the extension shell. Before assembly, the first elastic arm is located outside the limiting port. After assembly, one end of the first elastic arm passes through the limiting port and is elastically locked at the limiting port, while limiting or blocking the assembly with the extension shell to prevent separation.

[0016] Furthermore, as described above, the extension shell is also provided with a second elastic arm. One end of the second elastic arm is separated from the extension shell and faces the inner cavity end of the extension shell. The second elastic arm is also integrally injection molded with the extension shell and is used to limit and clamp the components assembled with the extension shell. The clamping position of the second elastic arm is obliquely opposite to the clamping position of the first elastic arm. The cross-sectional dimension of the extension shell is smaller than that of the inner shell, that is, a step is provided at the connection position between the extension shell and the inner shell to increase the structural strength of the connection part.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the device has an integrated structural design, the shell is an integrated three-cavity structure, the outer sleeve is equipped with a waterproof ring to ensure airtightness, and the interior is convenient for installing electronic components and plugging operations. Attached Figure Description

[0018] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0019] Figure 2 The three-dimensional representation of this utility model Figure 2 ;

[0020] Figure 3 The three-dimensional representation of this utility model Figure 3 ;

[0021] Figure 4 for Figure 3 An explosion diagram;

[0022] Figure 5 for Figure 3 Rear view;

[0023] Figure 6for Figure 5 Half-section view along the AA direction;

[0024] Figure 7 for Figure 3 The main view;

[0025] Figure 8 for Figure 7 Half-section view in the BB direction.

[0026] In the diagram: 1. Shell; 11. Outer shell; 110. Annular groove; 111. Inverted buckle; 112. Side through hole; 12. Inner shell; 121. Reinforcing rib; 122. Locking protrusion; 123. Inner locking component; 124. Connecting plate; 125. Rib plate; 13. Extension shell; 131. First elastic arm; 132. Limiting port; 133. Second elastic arm; 2. Waterproof ring. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "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 this utility model and 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," "set," etc., should be interpreted broadly. For example, when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "installed" on another element, it can be directly installed on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the two elements.

[0029] Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] 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 protection scope of the present utility model.

[0031] Example 1

[0032] Reference Figure 1-8 As shown, the present invention provides a low-voltage waterproof connector plug for automobiles, including a housing 1 and a waterproof ring 2 sleeved on the housing 1. The housing 1 is used to install electronic devices and to connect with the connector of the wiring harness. The waterproof ring 2 can effectively prevent moisture and other external humid environments from entering the connector plug.

[0033] Specifically, the housing 1 includes an integrally injection-molded outer shell 11, an inner shell 12, and an extended shell 13, i.e., the housing 1 is an integral three-cavity structure. The outer shell 11 is provided with an undercut 111 and an annular groove 110. The undercut 111 adopts an elastic structure, which simplifies the operation of connector plug insertion and effectively prevents components from falling off due to vibration during high-speed vehicle operation. A waterproof ring 2 is fitted inside the annular groove 110. The installation of the waterproof ring 2 is simple. The waterproof ring 2 is interference-fitted into the annular groove 110 and can be selected... The annular groove 110 has a depth greater than its width, and the groove wall has an inclination angle of 15°-20°. The inner shell 12 is located inside the outer shell 11 and is connected to the outer shell 11 through a connecting plate 124. The extension shell 13 and the inner shell 12 are connected and pass through each other. The extension shell 13 is provided with a limiting port 132 and a first elastic arm 131. One end of the first elastic arm 131 is elastically locked in the limiting port 132. The first elastic arm 131 extends into the limiting port 132 and elastically limits the movement, which can limit and lock the parts that cooperate with the extension shell 13, preventing them from disengaging. The self-locking structure formed by the first elastic arm 131 and the limiting port 132 is used to solve the problem of the connector plug disengaging under high-speed vibration working environment.

[0034] Example 2

[0035] Reference Figure 1-8 As shown, based on the technical solution of Embodiment 1, a low-voltage waterproof connector plug for automobiles, combined with... Figure 1-2 and Figure 8 It can be seen that the inverted buckle 111 is located on one open end of the outer shell 11. Two inverted buckles 111 are provided in a symmetrical arrangement. The shape of the inverted buckle 111 matches the component that will cooperate with it during the inverted insertion operation. It adopts an elastic structural design and is integrally injection molded with the outer shell 11. Furthermore, as... Figure 6As shown, the annular groove 110 is located at the other open end of the outer shell 11 and is suspended outside the mounting area in the middle of the inner shell 12. The annular groove 110 is designed to be located at the open end of the outer shell 11, and the projected position of the annular groove 110 is located in the middle of the inner shell 12. Furthermore, the annular groove 110 is formed by two annular pieces extending outward circumferentially from the outer shell 11. The structural design of the annular groove 110 is that it is an open groove formed by the outer shell 11 and the two annular pieces, and the annular pieces are integrally injection molded with the outer shell 11. (Refer to...) Figure 4 , Figure 6 and Figure 8 It can be known that...

[0036] Furthermore, in combination Figure 5 - As shown in Figure 8, the outer surface of the inner shell 12 is provided with a locking protrusion 122, and the inner wall of the inner shell 12 is provided with an inner locking member 123. The function of the locking protrusion 122 and the inner locking member 123 is to assemble and cooperate with other components. For example Figure 6 As shown, the locking protrusion 122 and the inner locking member 123 are located on both sides of the connecting plate 124, and their positions are designed according to actual needs. Furthermore, in conjunction with... Figure 2 and Figure 5 It is known that the two sides of the positioning protrusion 122 are provided with reinforcing ribs 121 to increase the structural strength. The inner clamping member 123 extends from the plane where the connecting plate 124 is located to the opening end of the inner shell 12 to provide installation space and assembly structure for electronic devices.

[0037] Furthermore, such as Figure 2 and Figure 5 As shown, the outer casing 11 is also provided with a side through hole 112, which is located on the axis of symmetry of the two inverted buckles 111 and is opposite to the locking protrusion 122, to facilitate overall assembly. Furthermore, in conjunction with... Figure 3-8 It is understood that multiple stiffeners 125 are connected between the inner shell 12 and the outer shell 11 to increase the structural strength between the inner shell 12 and the outer shell 11. The stiffeners 125 are also connected to the connecting plate 124. By optimizing the design of the stiffeners 125, the stiffeners 125 are all vertically connected to the connecting plate 124, avoiding the situation where the side opening of the stiffeners 125 requires side core pulling. In order to meet the design of the inner shell 12 and the outer shell 11 as a whole injection molding, the injection mold structure is simplified as much as possible, and the mold opening difficulty and manufacturing cost are reduced.

[0038] Example 3

[0039] Reference Figure 1-8 As shown, based on the technical solution of the above embodiments, a low-voltage waterproof connector plug for automobiles, combined with... Figure 1-3 and Figure 6It is understood that the first elastic arm 131 is located at the connection between the extension shell 13 and the inner shell 12, and the main body of the first elastic arm 131 is located outside the extension shell 13. The first elastic arm 131 is integrally injection molded with the extension shell 13 and the inner shell 12, and is a component used to limit or lock the assembly with the extension shell 13. Before assembly, the first elastic arm 131 is located outside the limiting opening 132. After assembly, one end of the first elastic arm 131 passes through the limiting opening 132 and is elastically locked at the limiting opening 132, while limiting or blocking the assembly with the extension shell 13 to prevent separation. In addition, as Figure 3 , Figure 6 and Figure 8 As shown, the extension shell 13 is also provided with a second elastic arm 133. One end of the second elastic arm 133 is separated from the extension shell 13 and faces the inner cavity end of the extension shell 13. The second elastic arm 133 is also integrally injection molded with the extension shell 13 and is used to limit and clamp the components assembled with the extension shell 13. The clamping position of the second elastic arm 133 is obliquely opposite to the clamping position of the first elastic arm 131. The cross-sectional dimension of the extension shell 13 is smaller than that of the inner shell 12, that is, a step is provided at the connection position between the extension shell 13 and the inner shell 12 to increase the structural strength of the connection part. In order to meet the elastic engagement and assembly requirements of the first elastic arm 131 and the second elastic arm 133, the thickness to length ratio is designed to be 1:8 to ensure that the elastic deformation is ≥2mm.

[0040] The housing 1 of this application is obtained by an integral injection molding process, that is, the housing 1 with an integral three-cavity structure is directly prepared by an injection mold. The material of the housing 1 is selected as a good waterproof and high and low temperature resistant insulating material, such as engineering plastic material, to ensure the safety of circuit use. The injection molding process, injection molding mold and housing 1 material selection are all corresponding mature technologies or industry standards, and will not be elaborated here.

[0041] The improvement of this application lies in the external connection structure. The plastic outer shell 11 on the housing 1 is connected and fastened to the plastic housing of the automotive lamp via two side buckles 111. The assembly process is simple and effective, solving the problem of complicated assembly between other connectors after the wiring harness is installed and the lamp housing. In addition, the side buckles 111 can also effectively ensure that the internal components of the lamp housing are firmly assembled. The outer shell 11 is equipped with a waterproof ring 2, which can effectively prevent moisture and other external humid environments from entering the connector plug.

[0042] In this utility model device, the assembly and matching relationships of the various components, the materials of the shell 1 and the waterproof ring 2, and the related process equipment involved in the integrated injection molding are existing technologies or materials. The relevant technical personnel can directly purchase or order them from the market according to the required product model and specifications.

[0043] The above description is merely a preferred embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It is obvious to those skilled in the art that this utility model is not limited to the details of the above embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A low-voltage waterproof connector plug for automobiles, comprising a housing (1) and a waterproof ring (2) sleeved on the housing (1), characterized in that, The housing (1) includes an integrally injection molded outer shell (11), inner shell (12) and extension shell (13). The outer shell (11) is provided with an undercut (111) and an annular groove (110) on the outside. A waterproof ring (2) is fitted inside the annular groove (110). The inner shell (12) is located inside the outer shell (11) and is connected to the outer shell (11) through a connecting plate (124). The extension shell (13) and the inner shell (12) are connected and have a limiting port (132) and a first elastic arm (131) on the extension shell (13). One end of the first elastic arm (131) is elastically locked in the limiting port (132).

2. The low voltage waterproof connector plug for an automobile according to claim 1, wherein The buckle (111) is located on an open end of the outer shell (11), and there are two buckles (111) in a symmetrical arrangement.

3. The low voltage waterproof connector plug for an automobile according to claim 2, wherein The annular groove (110) is located at the other opening end of the outer shell (11) and is suspended outside the mounting in the middle of the inner shell (12).

4. The low voltage waterproof connector plug for automobile according to claim 1, characterized in that, The annular groove (110) is formed by two annular plates extending outward from the outer shell (11) in the circumferential direction.

5. The low voltage waterproof connector plug for an automobile according to claim 1, wherein The outer side of the inner shell (12) is provided with a locking protrusion (122), and the inner wall of the inner shell (12) is provided with an inner locking member (123). The locking protrusion (122) and the inner locking member (123) are located on both sides of the connecting plate (124).

6. The low voltage waterproof connector plug for an automobile according to claim 5, wherein The locking protrusion (122) is provided with reinforcing ribs (121) on both sides, and the inner locking member (123) extends from the plane of the connecting plate (124) to the opening end of the inner shell (12).

7. The low voltage waterproof connector plug for an automobile according to claim 5, wherein The outer shell (11) is also provided with a side through hole (112), which is located on the axis of symmetry of the two buckles (111) and is opposite to the locking protrusion (122).

8. The low voltage waterproof connector plug for automobile according to claim 1, characterized in that, The inner shell (12) and the outer shell (11) are connected by a plurality of stiffening plates (125), and the stiffening plates (125) are also connected to the connecting plate (124).

9. The low voltage waterproof connector plug for an automobile according to claim 1, wherein The first elastic arm (131) is located at the connection between the extension shell (13) and the inner shell (12), and the main body of the first elastic arm (131) is located outside the extension shell (13).

10. The low voltage waterproof connector plug for an automobile according to claim 9, wherein The extension shell (13) is also provided with a second elastic arm (133). One end of the second elastic arm (133) is separated from the extension shell (13) and faces the inner cavity end of the extension shell (13). The cross-sectional dimension of the extension shell (13) is smaller than that of the inner shell (12).

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