Splash-proof air pressure sensor

Abstract

The utility model discloses a splash-proof air pressure sensor, which comprises an end button subassembly, a cover plate, a water retaining rib, a splash-proof rib and a pressure chip, one surface of the cover plate is fixed on the terminal sub-assembly in a bonding manner; the pressure chip is located between the cover plate and the terminal sub-assembly, and the surface of the pressure chip is covered with protective glue. A part of the other surface of the cover plate protrudes outwards to form a protection protrusion, an air cavity is formed in the protection protrusion, and the protection protrusion is located on the outer side of the pressure chip; a water retaining rib and a splash-proof rib are arranged in the air cavity; the water retaining ribs are distributed at the bottom of the air cavity at intervals, the splash-proof ribs are located above the water retaining ribs, and narrow gaps are formed between the splash-proof ribs and protection glue of the pressure chip. According to the utility model, on the premise of meeting the normal function of the barometric sensor, the water drops in the air cavity are prevented from reaching the sensing hole of the chip by reducing the kinetic energy of the water drops in the air cavity, reducing the splash passing area and increasing part of the water guide structure, so that the normal function of the barometric sensor under extreme conditions is ensured, and the product performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of barometric pressure sensors. More specifically, this utility model relates to a water-resistant barometric pressure sensor. Background Technology

[0002] With the rapid development of society and technology, existing commercial vehicle air pressure sensors lack drainage and splash-proof structures within their air chambers. When a small amount of water droplets are present in the sensing chamber, the product vibrates with the vehicle, causing these droplets to agitate and potentially splash into the chip's pressure sensing aperture. If extreme low temperatures occur, the water droplets in the aperture may freeze, blocking the chip from sensing the air pressure in the air circuit, leading to product malfunction and ultimately causing abnormal air pressure in the air circuit, preventing the commercial vehicle from operating normally. Utility Model Content

[0003] In order to achieve these objectives and other advantages of the present invention, a preferred embodiment of the present invention provides a splash-proof water pressure sensor, including a terminal assembly, a cover plate, a pressure chip, a water-blocking rib, and a splash-proof rib;

[0004] One side of the cover plate is fixed to the end button assembly by adhesive bonding; the pressure chip is located between the cover plate and the end button assembly, and the surface of the pressure chip is covered with protective adhesive. The cover plate has an air cavity, and the pressure chip is located in the air cavity; the other side of the cover plate has a protective protrusion that protrudes outward in part, and has an air cavity inside. The protective protrusion is located outside the pressure chip, and external gas enters the air cavity through the air inlet on the surface of the cover and is sprayed onto the surface of the pressure chip.

[0005] The air cavity is provided with water-blocking ribs and splash-proof ribs; a number of water-blocking ribs are spaced apart at the bottom of the air cavity, and a number of splash-proof ribs are located above the water-blocking ribs, forming a narrow gap between them and the protective adhesive of the pressure chip.

[0006] According to a preferred embodiment of the present invention, the end button sub-assembly includes a pin and a sleeve, the pin and the sleeve being integrally formed by injection molding; the surface mount circuit board sub-assembly is located inside the end button sub-assembly, and the surface mount circuit board sub-assembly is electrically connected to the pin by soldering; the PCB module is fixed to the cover plate by adhesive; a pressure chip is soldered onto the PCB module.

[0007] According to a preferred embodiment of the present invention, the splash-proof rib is inclined, and the inclined direction is toward the water-blocking rib.

[0008] According to a preferred embodiment of the present invention, the height of the water-blocking rib is lower than the position of the air inlet.

[0009] According to a preferred embodiment of the present invention, the PCB module and the surface mount circuit board sub-assembly are connected by a connecting wire harness.

[0010] According to a preferred embodiment of the present invention, the protective adhesive of the pressure chip covers the surface of the pressure chip and the welding area.

[0011] According to a preferred embodiment of the present invention, there are two anti-splash ribs, which are respectively fixed to the inner walls of the two vertical sides of the air cavity, and the ends of the two ribs that are close to each other are spaced apart by a certain distance.

[0012] According to a preferred embodiment of the present invention, the apex angle of the triangular cross-section of the splash guard faces the center of the air cavity.

[0013] This utility model has at least the following beneficial effects: This utility model provides a pressure sensor with a splash-proof structure. Under the premise of meeting the normal function of the pressure sensor, it prevents water droplets in the air cavity from reaching the chip sensing hole by reducing the kinetic energy of water droplets in the air cavity, reducing the area through which water splashes pass, and increasing some water guiding structures. This ensures that the pressure sensor functions normally under extreme conditions and improves product performance.

[0014] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the anti-splash air pressure sensor in this utility model.

[0016] Figure 2 This is a schematic diagram showing the arrangement of the water-blocking ribs and splash-proof ribs in this utility model. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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, the above terms should not be construed as a limitation of this 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 another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0021] like Figure 1-2 As shown, a preferred embodiment of the present invention provides a splash-proof water pressure sensor, including a terminal assembly 1, a cover plate 2, a pressure chip 3, a water-blocking rib 7, and a splash-proof rib 8;

[0022] One side of the cover plate 2 is fixed to the end button assembly 1 by adhesive bonding; the pressure chip 3 is located between the cover plate 2 and the end button assembly, and the surface of the pressure chip 3 is covered with protective adhesive 4. The cover plate has an air cavity 6, and the pressure chip 3 is located in the air cavity 6; the other side of the cover plate 2 is partially convex outward to form a protective protrusion 5. The protective protrusion 5 is located outside the pressure chip 3, and external gas enters the air cavity through the air inlet on the surface of the cover and is sprayed onto the surface of the pressure chip 3;

[0023] The air cavity 6 is provided with water-blocking ribs 7 and splash-proof ribs 8; a number of water-blocking ribs are spaced apart at the bottom of the air cavity, and a number of splash-proof ribs are located above the water-blocking ribs, forming a narrow gap between them and the protective adhesive of the pressure chip.

[0024] In the above technical solution, the design of the protective protrusion and air cavity allows external gas to enter the air cavity and be sprayed onto the surface of the pressure chip, achieving air pressure detection. The combination of the water-blocking ribs and anti-splash ribs effectively blocks splashing water or high-pressure water flow, preventing liquid from directly impacting the pressure chip. The narrow gap between the anti-splash ribs and the protective adhesive further restricts liquid ingress, improving protective performance. The protective adhesive covers the surface of the pressure chip and the soldering area, preventing corrosion or short circuits and extending the sensor's lifespan.

[0025] In another technical solution, the terminal assembly includes a pin 9 and a sleeve 10, which are integrally formed by injection molding; the surface mount circuit board assembly is located inside the terminal assembly, and the surface mount circuit board assembly is electrically connected to the pin by soldering; the PCB module 11 is fixed to the cover plate 2 by adhesive; and a pressure chip 3 is soldered onto the PCB module 11.

[0026] In the above technical solution, the pins and sleeves are integrally molded through injection molding, improving structural strength and assembly accuracy, and reducing the risk of poor contact. The surface mount circuit board sub-assembly is connected to the pins by soldering, ensuring signal transmission stability. The PCB module is fixed to the cover plate with adhesive to prevent displacement caused by vibration or temperature changes, ensuring the measurement accuracy of the pressure chip. The overall structure is compact and highly reliable.

[0027] In another technical solution, the splash guard 8 is inclined, with the inclination direction facing the water-blocking guard.

[0028] In the above technical solution, the angled anti-splash ribs guide the liquid to the water-blocking ribs, preventing liquid from stagnating or rebounding in the air chamber. The liquid flows along the angle and is ultimately intercepted and discharged by the water-blocking ribs, improving waterproofing efficiency. This design is particularly suitable for high-pressure water flow or splashing water environments, ensuring long-term stable operation of the pressure chip.

[0029] In another technical solution, the height of the water-blocking rib 7 is lower than the position of the air inlet.

[0030] The water-retaining rib is lower than the air inlet, ensuring smooth gas entry into the air chamber without affecting the accuracy of air pressure detection. Simultaneously, the water-retaining rib effectively intercepts liquid entering from the air inlet, preventing it from contacting the pressure chip. This design balances the requirements of gas flow and liquid obstruction, optimizing sensor performance.

[0031] In another technical solution, the PCB module 11 is connected to the surface mount circuit board sub-assembly via a connecting harness.

[0032] In the above technical solution, the flexible wire harness connection can absorb the stress generated by vibration or impact, avoiding the risk of breakage caused by rigid connection. The wire harness provides a stable electrical connection, while allowing for small displacements between the PCB module 11 and the surface mount circuit board sub-assembly, adapting to complex working conditions and extending the service life of the sensor.

[0033] In another technical solution, the protective adhesive of the pressure chip covers the surface of the pressure chip and the welding area.

[0034] In the above technical solution, the protective adhesive fully covers the surface of the pressure chip and the soldering area, preventing moisture or corrosive media from eroding the sensitive components and solder joints. This design significantly improves the sensor's environmental adaptability, making it suitable for high humidity, dusty, or corrosive environments, ensuring long-term reliable operation.

[0035] In another technical solution, there are two anti-splash ribs 8, which are respectively fixed to the inner walls of the two vertical sides of the air cavity, and the ends of the two ribs that are close to each other are spaced apart by a certain distance.

[0036] In the above technical solution, the double splash guard design forms symmetrical protection on both sides of the gas chamber, effectively preventing liquid from entering from different directions. The spacing design ensures unobstructed gas flow, maintaining detection sensitivity. This structure achieves a balance between protection and gas flow, improving the overall performance of the sensor.

[0037] In another technical solution, the apex angle of the triangular cross-section of the splash guard faces the center of the air cavity.

[0038] In the above technical solution, the apex design of the triangular cross-section can more efficiently guide the liquid flow to the water-retaining ribs, reducing liquid stagnation. The sharp apex can break up droplets, reducing the risk of splashing. This structure further optimizes liquid management capabilities and enhances protective reliability.

[0039] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A splash-proof air pressure sensor, characterized in that, Includes end button assembly, cover plate, water baffle rib, splash baffle rib, and pressure chip; One side of the cover plate is fixed to the end button assembly by adhesive bonding; the pressure chip is located between the cover plate and the end button assembly, and the surface of the pressure chip is covered with protective adhesive. The cover plate has an air cavity, and the pressure chip is located in the air cavity. Furthermore, external gas enters the air chamber through the air inlet on the surface of the cover and is sprayed onto the surface of the pressure chip. The air cavity is provided with water-blocking ribs and splash-proof ribs; a number of water-blocking ribs are spaced apart at the bottom of the air cavity, and a number of splash-proof ribs are located above the water-blocking ribs, forming a narrow gap between them and the protective adhesive of the pressure chip.

2. The splash-proof water pressure sensor according to claim 1, characterized in that, The terminal assembly includes a pin and a sleeve, which are integrally formed by injection molding; the surface mount circuit board assembly is located inside the terminal assembly, and the surface mount circuit board assembly is electrically connected to the pin by soldering; the PCB module is fixed to the cover plate by adhesive; a pressure chip is soldered on the PCB module.

3. The splash-proof water pressure sensor according to claim 1, characterized in that, The splash guard is inclined, with the inclination direction facing the water-blocking guard.

4. The splash-proof water pressure sensor according to claim 1, characterized in that, The height of the water-blocking rib is lower than the position of the air inlet.

5. The splash-proof water pressure sensor according to claim 1, characterized in that, The PCB module and the surface mount circuit board sub-assembly are connected by a connecting wire harness.

6. The splash-proof water pressure sensor according to claim 1, characterized in that, The protective adhesive of the pressure chip covers the surface of the pressure chip and the welding area.

7. The splash-proof water pressure sensor according to claim 1, characterized in that, There are two anti-splash ribs, which are fixed to the inner walls of the two vertical sides of the air chamber, and the ends of the two ribs that are close to each other are spaced a certain distance apart.

8. The splash-proof water pressure sensor according to claim 1, characterized in that, The apex of the triangular cross-section of the splash guard faces the center of the air cavity.

9. The splash-proof water pressure sensor according to claim 1, characterized in that, On the other side of the cover plate, a protective protrusion is formed by a partial outward protrusion, which is located outside the pressure chip.

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