Sensor structure with injection molding sealing rib

Abstract

The sensor structure comprises a shell assembly and a connector body, the shell assembly comprises a shell and a support arranged in the shell, a chip is assembled on the support, a port of the shell is provided with at least two sealing ribs, and the sealing ribs are arranged in the shell. The at least two sealing ribs are distributed at intervals in the axial direction of the shell, and the shell assembly is embedded into the connector body in a sealing fit mode at the end, provided with the sealing ribs, of the shell assembly. The sensor structure with the injection molding sealing rib provided by the utility model has better sealing durability, better sealing effect, simple production process and low production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor products, in particular to a sensor structure with an injection molding sealing rib. Background Art

[0002] Most engine sensors assemble the chip and circuit board (if any) onto the bracket, and then assemble the bracket into the housing, and perform potting and curing to form a housing assembly. Finally, the connector body and the housing assembly are assembled into a finished product through a laser welding process.

[0003] However, the working environment of engine sensors is generally relatively harsh, including high temperature, high humidity, vibration, and various chemical reagents, etc., which require high structural stability and sealing performance for the product. After long-term use, the two welded bodies in conventional engine sensors are prone to come apart, resulting in defective products. At the same time, the investment cost of laser welding equipment is relatively high, the process control is difficult, and there is also a problem of poor sealing durability. Summary of the Utility Model

[0004] An embodiment of the present application provides a sensor structure with an injection molding sealing rib, which can be assembled together by injection molding to form a finished product. At the same time, the sealing rib is automatically integrated with the housing assembly and the connector body during the injection molding process, which can effectively improve the sealing durability of the sensor.

[0005] An embodiment of the present application provides a sensor structure with an injection molding sealing rib, including a housing assembly and a connector body. The housing assembly includes a housing and a bracket arranged inside the housing. A chip is assembled on the bracket. At least two sealing ribs are arranged at the port of the housing, and at least two of the sealing ribs are spaced apart along the axial direction of the housing. One end of the housing assembly where the sealing ribs are arranged is embedded into the connector body in a sealing fit manner.

[0006] In a possible implementation manner, the sealing rib and the housing are integrally injection molded.

[0007] In a possible implementation manner, there are two or three sealing ribs.

[0008] In a possible implementation manner, the sealing rib is in an isosceles triangle shape, and there are arc transitions between the two waists of the sealing rib and between the waist and the port of the housing.

[0009] In a possible implementation manner, the axial span dimension of the tip of the sealing rib is less than or equal to 0.13 mm.

[0010] In a possible implementation manner, the height of the sealing rib is 1.15 mm to 1.35 mm.

[0011] In a possible implementation, the minimum distance between two adjacent sealing ribs is 0.6 mm to 0.8 mm.

[0012] Beneficial effects: Compared with the prior art, the sensor structure with injection-molded sealing ribs provided by this application can effectively improve the sealing durability of the sensor and has a better sealing effect by arranging at least two sealing ribs at the port of the housing, and the sealing ribs are melted synchronously when the housing assembly and the connector body are injection-molded.

[0013] These and other objects, features, and advantages of the present utility model are fully embodied through the following detailed description. Brief Description of the Drawings

[0014] Figure 1 Fig. shows a three-dimensional structural schematic diagram of the sensor structure with injection-molded sealing ribs of this application.

[0015] Figure 2 Fig. shows a front view structural schematic diagram of the housing assembly in this application.

[0016] Figure 3 Fig. shows a partial cross-sectional structural schematic diagram of the housing assembly in this application.

[0017] Figure 4 Fig. shows a data schematic diagram of the sensor sealing performance test in this application. Detailed Description of the Embodiment

[0018] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other embodiments, variations, improvements, equivalent solutions, and other technical solutions that do not depart from the spirit and scope of the present utility model.

[0019] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0020] It is understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0021] In a conventional sensor, the housing assembly and the connector body may be sealed by epoxy potting. The thermal expansion and contraction during the sealing process are likely to damage the internal components of the product, reducing the quality and performance of the product. At the same time, after long-term use, the epoxy is likely to separate from the outside, with poor anti-vibration performance. Moreover, in terms of process control, it is difficult to control factors such as bubble control and glue curing temperature conditions. Connecting the housing assembly and the connector body by laser welding is likely to cause the two to separate after long-term use. At the same time, the investment cost of laser welding equipment is high and the process is difficult to control.

[0022] Reference Figures 1 to 3 , an embodiment of the present application provides a sensor structure with injection-molded sealing ribs, including a housing assembly 10 and a connector body 20. The housing assembly 10 includes a housing 11 and a bracket 12 disposed inside the housing 11. A chip is assembled on the bracket 12. At the same time, at least two sealing ribs 13 are provided at the port 111 of the housing 11, and at least two of the sealing ribs 13 are spaced apart along the axial direction of the housing 11. Generally, the sealing ribs 13 and the housing 11 are integrally injection-molded. One end of the housing assembly 10 where the sealing ribs 13 are provided is embedded into the connector body 20 in a sealing fit manner. In this way, during the injection molding process of the housing assembly 10 and the connector body 20, the sealing ribs 13 at the joint of the housing assembly 10 and the connector body 20 will also be melted synchronously, thereby forming a complete injection-molded structure, which is not only structurally stable but also has better sealing durability. It can meet the use in harsh environments such as high temperature and high humidity, and water vapor and chemical reagents are not easy to enter the product interior, thus ensuring the quality of the sensor and having a longer service life. In addition, the production process is simpler and the production cost can be saved.

[0023] After the sealing performance test, 6 pcs of sensor samples were immersed in water at a depth of 1 meter for 45 minutes at 21.0°C and 40% RH environment and there was still no water intrusion, meeting the test requirements (see Figure 4 ).

[0024] In one embodiment, the sealing ribs 13 have two. Or when the size and distribution permit, the sealing ribs 13 can also be set to three.

[0025] In one embodiment, the sealing rib 13 is in an isosceles triangle shape. Meanwhile, there are arc transitions both between the two waists of the sealing rib 13 and between the waist and the port of the housing 11. Thus, a relatively large molten bonding area can be formed axially after hot melting, ensuring the sealing reliability of the sealing rib 13 after hot melting.

[0026] In one embodiment, the span dimension α of the tip of the sealing rib 13 in the axial direction is less than or equal to 0.13 mm. When permitted by the mold, the smaller the span of the tip in the axial direction, or the sharper the tip, the better. The sealing rib 13 can be quickly hot-melted and flow to both sides.

[0027] In one embodiment, the height β of the sealing rib 13 is 1.15 mm to 1.35 mm, preferably 1.25 mm.

[0028] In one embodiment, the minimum distance between two adjacent sealing ribs 13 (i.e., the distance between the bottoms of the sealing ribs 13) γ is 0.6 mm to 0.8 mm, preferably 0.76 mm.

[0029] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the above principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. A sensor structure with an injection-molded sealing rib, characterized in that: It includes a shell assembly and a connector body, wherein the shell assembly includes a shell and a bracket arranged in the shell, a chip is mounted on the bracket, the port of the shell is provided with at least two sealing ribs, and at least two of the sealing ribs are distributed at intervals along the axial direction of the shell, and the shell assembly is embedded in the connector body in a sealed manner at one end where the sealing ribs are provided.

2. The sensor structure with injection-molded sealing ribs according to claim 1, characterized in that: The sealing rib and the housing are integrally injection-molded.

3. The sensor structure with injection-molded sealing ribs according to claim 1, characterized in that: The sealing ribs have two or three layers.

4. The sensor structure with injection-molded sealing ribs as claimed in claim 3, characterized in that: The sealing rib is in the form of an isosceles triangle, and there are arc transitions between the two waists of the sealing rib and between the waist and the port of the shell.

5. The sensor structure with injection-molded sealing ribs as claimed in claim 4, characterized in that: The axial span of the top of the sealing rib is less than or equal to 0.13 mm.

6. The sensor structure with injection-molded sealing ribs according to claim 4, characterized in that: The height of the sealing rib is 1.15 mm to 1.35 mm.

7. The sensor structure with injection-molded sealing ribs according to claim 4, characterized in that: The minimum distance between two adjacent sealing ribs is 0.6 mm to 0.8 mm.

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