An integrated pressure transmitter

Abstract

The utility model discloses an integrated pressure transmitter, including the shell subassembly, the shell subassembly includes the welding seat, the welding seat one end welding has the joint part, the other end welding has the shell sleeve, the shell sleeve is away from the joint part one end and is provided with the wire harness opening, be connected with the protective rubber sleeve on the shell sleeve, the protective rubber sleeve includes the injection molding portion in the shell sleeve, the protective rubber sleeve includes the outer connecting portion from the wire harness opening, the injection molding portion nanometer injection molding is connected on the shell sleeve, the wire harness unit is connected in the protective rubber sleeve. The utility model provides an integrated pressure transmitter, can improve the protection effect of pressure transmitter, ensures the long -term stability of pressure transmitter.

Description

Technical Field

[0001] This utility model relates to the field of transmitter technology, and in particular to an integrated pressure transmitter. Background Technology

[0002] A pressure transmitter is an electronic device that can detect the pressure of different media. It can convert the sensed media pressure into an electrical signal and transmit it to an external display and control device. The detected media and environment are complex and diverse. Integrated MEMS pressure transmitters can be used for a long time in harsh environments.

[0003] For example, announcement number "CN112378571A" discloses "an impact-resistant pressure transmitter," which includes a housing. A control connector is located at the top of the housing, and a cable is located on one side of the control connector. An air inlet is located at the bottom of the housing. An analog circuit board is located at the top inside the housing, and a compensation circuit board is located at the bottom of the analog circuit board. A pressure chamber is located at the top inside the air inlet. Insulating sheets are located on both sides of the pressure chamber. An electrode is located on one side of the insulating sheet, and a measuring diaphragm is located on the side of the electrode away from the insulating sheet. A pressure-resistant diverter is located at the top inside the pressure chamber, and the pressure-resistant diverter is connected to the top inside the pressure chamber by several buffer springs. A medium inlet is located at the bottom of the pressure chamber. However, in practical applications, transmitters with this type of riveted structure operating for extended periods in harsh environments are at risk of rainwater and dust entering the connection points, leading to communication abnormalities and unreliable long-term effectiveness and stability. Utility Model Content

[0004] In view of the problem of poor sealing in riveted transmitters mentioned in the background art, this utility model provides an integrated pressure transmitter, which can improve the protection effect of the pressure transmitter and ensure the long-term stability of the pressure transmitter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] An integrated pressure transmitter includes a housing assembly. The housing assembly includes a welding base with a connector welded to one end and a housing sleeve welded to the other end. A wiring harness opening is located at the end of the housing sleeve away from the connector. A protective sleeve is connected to the housing sleeve, and the protective sleeve includes an injection-molded portion located within the housing sleeve. The protective sleeve also includes an external connecting portion extending through the wiring harness opening. The injection-molded portion is nano-injection molded onto the housing sleeve, and a wiring harness unit is connected within the protective sleeve. In the prior art, a pressure transmitter is an electronic device capable of detecting the pressure of different media. It converts the sensed media pressure into an electrical signal, which is then transmitted to an external display and control device. The detected media and environments are complex and diverse. Integrated MEMS pressure transmitters can operate for extended periods in harsh environments. Currently, most pressure transmitters in the industry use connectors and housings connected by riveting technology. In harsh environments, prolonged operation exposes the connection points to the risk of rainwater and dust ingress, leading to communication abnormalities and unreliable long-term effectiveness and stability. Conventional MEMS pressure transmitters use a riveted connection between the connector and the transmitter housing. During prolonged operation in corrosive environments, corrosive gases and liquids can easily enter the transmitter cavity through this connection, disrupting the transmitter's electrical signal. While adding O-rings and applying adhesive to the connector-housing connection provides short-term protection, the adhesive and O-rings cannot withstand long-term corrosion and water erosion, ultimately leading to transmitter failure. Therefore, to address the aforementioned issues, this application eliminates the sealing ring and riveting encapsulation method, and instead divides the housing assembly into three parts: a connector, a housing sleeve, and a welding seat. The welding seat is positioned between the connector and the housing sleeve, and is welded to both the connector and the housing sleeve to ensure the sealing and connection stability of the housing assembly and reduce the infiltration of external media. Furthermore, a wire harness opening is provided on the housing sleeve, and a sensing component is installed inside the housing sleeve. The sensing component is connected to the wire harness unit, which needs to pass through the wire harness opening. A protective sleeve is connected to the wire harness opening, with one part of the protective sleeve located inside the housing sleeve and the other part extending out of the wire harness opening onto the outer area of ​​the housing sleeve. The part inside the housing sleeve is the injection-molded part, and the part outside the housing sleeve is the external connection part. The injection-molded part and the housing sleeve are connected by nano-injection molding, ensuring the reliability of the connection between the protective sleeve and the housing sleeve. The wire harness unit is connected inside the protective sleeve, improving the protection effect for the wire harness unit.

[0007] Preferably, the welding seat includes a stepped bending section, with the joint portion and the housing sleeve respectively connected on both sides of the stepped bending section. The welding seat has a stepped bending section with a stepped structure, forming a stepped structure on both sides. The joint portion and the housing sleeve are connected on both sides of the stepped bending section. This stepped structure provides a limiting and constraining effect between the joint portion and the housing sleeve, ensuring stability and relative position during the welding process, increasing the contact area, and thus ensuring the reliability of the connection.

[0008] Preferably, the welding seat includes an open seat located inside the housing sleeve, and a sensing component is connected to the open seat. The sensing component is connected to a wiring harness unit. The welding seat includes an open seat, and the sensing component is connected to the open seat, so that the sensing component inside the housing sleeve can obtain a limiting constraint effect due to its connection to the open seat, ensuring the stability of the internal components.

[0009] Preferably, the sensing component includes a fixed base, which includes a metal outer ring portion that is laser-welded to an open seat. The sensing component contains a fixed base, wherein the fixed base includes a metal outer ring portion disposed on its outer side, which is mated with the open seat. The metal outer ring portion is connected to the open seat by laser welding, thereby ensuring the connection stability of the fixed base.

[0010] Preferably, the outer metal ring includes a protruding ring positioned near the opening seat. The opening seat has a pre-drilled opening, and the protruding ring is connected within the pre-drilled opening. The protruding ring on the outer metal ring, protruding near the opening seat, and the pre-drilled opening on the opening seat, which mates with the protruding ring, allow the fixed base and the opening seat to maintain relative fixation during welding, improving welding accuracy and connection stability.

[0011] Preferably, the sensing component includes a fixed base, which includes a glass inner ring. The glass inner ring is connected to PIN pins, both ends of which extend through the glass inner ring and are respectively connected to a chip unit and a circuit board. The chip unit and circuit board are disposed on both sides of the glass inner ring. The fixed base includes a glass inner ring located in the central area. The glass inner ring is made of glass to ensure insulation and provide stable support for the internal PIN pins. The PIN pins within the glass inner ring connect to the chip unit and the circuit board, enabling the transmission of signals from the chip unit to the circuit board. The chip unit and circuit board are designed to be on opposite sides of the glass inner ring, thus providing insulation between them.

[0012] Preferably, a ceramic substrate is disposed between the chip unit and the inner glass ring, and the ceramic substrate has a substrate opening that allows PIN pins to pass through. The ceramic substrate is connected to the inner glass ring by soldering PIN pins, and the substrate opening facilitates connection with the PIN pins, allowing the chip unit to be attached to the ceramic substrate.

[0013] Preferably, an insulating gasket is provided between the circuit board and the inner glass ring, and the insulating gasket has a gasket opening that allows the PIN pin to pass through. The insulating gasket designed between the circuit board and the inner glass ring can further improve the insulation protection of the circuit board, and the gasket opening on the insulating gasket facilitates the connection of the PIN pin.

[0014] Preferably, the circuit board includes a conditioning and amplification circuit, one end of which is connected to a PIN pin, and the other end of which is connected to a wiring harness unit. The conditioning and amplification circuit within the circuit board amplifies the signal, receives the signal through the PIN pin, and transmits the signal through the wiring harness unit.

[0015] Preferably, the wire harness unit and the protective sleeve are injection molded as a single unit. This integrated injection molding structure improves connection stability, ensures a tight seal for protection, and reduces the risk of external media entering the interior.

[0016] The beneficial effects of this utility model are as follows: (1) It can ensure the sealing effect of the pressure transmitter, reduce the risk of external media entering the housing and sleeve, and ensure the stability of the device; (2) It can improve the placement stability of internal sensing components, protect the device from malfunction, and improve detection quality. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention.

[0018] Figure 2 This is an exploded view of this utility model.

[0019] Figure 3 This is an isometric view of the welding seat and the joint in this utility model.

[0020] Figure 4 This is an exploded view of the sensing component in this utility model.

[0021] In the picture: 1. Housing assembly, 11. Welding seat, 111. Stepped bending section, 112. Opening seat, 113. Reserved opening, 12. Connector, 13. Housing sleeve, 131. Wire harness opening; 2. Protective sleeve; 21. Injection molding part; 22. External connecting part; 3 wire harness units; 4 Sensing component, 41 Fixing base, 411 Metal outer ring, 412 Raised ring, 413 Glass inner ring, 42 Pin, 43 Chip unit, 44 Circuit board, 45 Ceramic substrate, 451 Substrate opening, 46 Insulating gasket, 461 Gasket opening. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: like Figure 1 , 3 As shown, an integrated pressure transmitter includes a housing assembly 1. The housing assembly 1 includes a welding seat 11, with a connector 12 welded to one end and a housing sleeve 13 welded to the other end. A wiring harness opening 131 is provided at the end of the housing sleeve 13 away from the connector 12. A protective sleeve 2 is connected to the housing sleeve 13. The protective sleeve 2 includes an injection-molded portion 21 located inside the housing sleeve 13 and an external connecting portion 22 extending through the wiring harness opening 131. The injection-molded portion 21 is nano-injection molded onto the housing sleeve 13. A wiring harness unit 3 is connected inside the protective sleeve 2. The wiring harness unit 3 and the protective sleeve 2 are injection-molded integral structures. The welding seat 11 includes a stepped bending section 111, with the connector and housing sleeve 13 respectively connected to its two sides.

[0024] In existing technologies, pressure transmitters are electronic devices that can detect the pressure of different media. They convert the sensed media pressure into electrical signals, which are then transmitted to external display and control devices. The detected media and environments are complex and diverse, and integrated MEMS pressure transmitters can operate for extended periods in harsh environments. Currently, most pressure transmitters in the industry use a connector-housing connection via riveting. In harsh environments, prolonged operation exposes these connections to the risk of rainwater and dust ingress, leading to communication abnormalities and unreliable long-term effectiveness and stability. Conventional MEMS pressure transmitters use a riveted connection between the connector and the transmitter housing. However, in corrosive environments, corrosive gases and liquids can easily enter the transmitter cavity through this connection, damaging the electrical signal. While adding O-rings and applying adhesive to the connector-housing connection provides short-term protection, the adhesive and O-rings are susceptible to corrosion and water erosion in the long run, leading to transmitter failure.

[0025] Therefore, to address the aforementioned issues, this application eliminates the sealing ring and riveting encapsulation method, and instead divides the housing assembly 1 into three parts: a connector 12, a housing sleeve 13, and a welding seat 11. The welding seat 11 is positioned between the connector 12 and the housing sleeve 13, and is welded to both the connector and the housing sleeve 13. This ensures the sealing performance and connection stability of the housing assembly 1, reducing the infiltration of external media. Furthermore, a wire harness opening 131 is provided on the housing sleeve 13, and a sensing component 4 is disposed inside the housing sleeve 13. The sensing component 4 is connected to the wire harness unit 3. The wire harness unit 3 needs to pass through the wire harness opening 131. A protective sleeve 2 is connected to the wire harness opening 131. Part of the protective sleeve 2 is located inside the housing sleeve 13, and the other part passes through the wire harness opening 131 and is located on the outer area of ​​the housing sleeve 13. The part inside the housing sleeve 13 is the injection molding part 21, and the part outside the housing sleeve 13 is the external connection part 22. The injection molding part 21 and the housing sleeve 13 are connected by nano-injection molding, which ensures the reliability of the connection between the protective sleeve 2 and the housing sleeve 13. The wire harness unit 3 is connected inside the protective sleeve 2, which improves the protection effect of the wire harness unit 3. The welding seat 11 has a stepped bending section with a stepped structure. The stepped bending section 111 forms a stepped structure on both sides. The two sides of the stepped bending section 111 are connected to the connector part 12 and the housing sleeve 13, respectively. The stepped structure can form a limiting constraint effect on the connector head 12 and the housing sleeve 13, ensuring the stability and relative position during the welding process, and increasing the contact area, thereby ensuring the reliability of the connection. By making the wire harness unit 3 and the protective sleeve 2 an integral injection molded structure, the connection stability can be improved, the sealing performance of the protection effect can be guaranteed, and the risk of external media entering the interior can be reduced.

[0026] Example 2: like Figure 2 As shown, the welding base 11 includes an opening 112 located inside the housing sleeve 13. A sensing component 4 is connected to the opening 112, and the sensing component 4 is connected to the wiring harness unit 3. The welding base 11 includes the opening 112, wherein the sensing component 4 is connected to the opening 112, so that the sensing component 4 inside the housing sleeve 13 can obtain a limiting constraint effect due to the connection of the opening 112, ensuring the stability of the internal components.

[0027] like Figure 2 , 4As shown, the sensing component 4 includes a fixed base 41, which includes a metal outer ring portion 411. The metal outer ring portion 411 is laser-welded to the opening seat 112. The sensing component 4 contains the fixed base 41, wherein the fixed base 41 includes a metal outer ring portion 411 disposed on the outer side. The metal outer ring portion 411 is mated with the opening seat 112. The metal outer ring portion 411 is connected to the opening seat 112 by laser welding, thereby ensuring the connection stability of the fixed base 41.

[0028] like Figure 1 , 2 As shown in Figure 4, the outer metal ring portion 411 includes a protruding ring 412 disposed near the opening seat 112. The opening seat 112 includes a reserved opening 113, and the protruding ring 412 is connected within the reserved opening 113. The protruding ring 412 is disposed on the outer metal ring portion 411, and the protruding ring 412 protrudes near the opening seat 112. The reserved opening 113 is disposed on the opening seat 112, wherein the reserved opening 113 abuts against the protruding ring 412, so that when the fixed base 41 and the opening seat 112 are welded, they can be kept relatively fixed through the protruding ring 412 and the reserved opening 113, thereby improving the welding accuracy and the connection stability of the two.

[0029] like Figure 2 , 4 As shown, the sensing component 4 includes a fixed base 41, which includes a glass inner ring 413. A PIN pin 42 is connected to the glass inner ring 413, with both ends of the PIN pin 42 extending out of the glass inner ring 413 and connected to a chip unit 43 and a circuit board 44, respectively. The chip unit 43 and the circuit board 44 are located on both sides of the glass inner ring 413. The fixed base 41 includes a glass inner ring 413 located in the central area. The glass inner ring 413 is made of glass to ensure insulation and provide stable support for the internal PIN pin 42. The PIN pin 42 within the glass inner ring 413 connects to the chip unit 43 and the circuit board 44, enabling the transmission of signals from the chip unit 43 to the circuit board 44. The chip unit 43 and the circuit board 44 are positioned on opposite sides of the glass inner ring 413, thus providing insulation between them.

[0030] like Figure 2 , 4As shown, a ceramic substrate 45 is disposed between the chip unit 43 and the inner glass ring 413. The ceramic substrate 45 has a substrate opening 451 that allows the PIN pin 42 to pass through. The ceramic substrate 45 is connected to the PIN pin 42 on the inner glass ring 413 by soldering, and the substrate opening 451 on the ceramic substrate 45 facilitates connection with the PIN pin 42, allowing the chip unit 43 to be attached to the ceramic substrate 45.

[0031] like Figure 2 , 4 As shown, an insulating washer 46 is provided between the circuit board 44 and the inner glass ring 413, and the insulating washer 46 has an opening 461 that allows the PIN pin 42 to pass through. The insulating washer 46 designed between the circuit board 44 and the inner glass ring 413 can further improve the insulation protection effect of the circuit board 44, and the opening 461 on the insulating washer 46 facilitates the connection of the PIN pin 42.

[0032] The circuit board 44 contains a conditioning and amplification circuit. One end of the conditioning and amplification circuit is connected to the PIN pin 42, and the other end is connected to the wiring harness unit 3. The conditioning and amplification circuit in the circuit board 44 can amplify the signal, receive the signal through the PIN pin 42, and transmit the signal through the wiring harness unit 3.

[0033] In addition to the above structure, this embodiment also includes a housing assembly 1. The housing assembly 1 includes a welding seat 11. One end of the welding seat 11 is welded with a connector 12, and the other end is welded with a housing sleeve 13. The end of the housing sleeve 13 away from the connector 12 is provided with a wire harness opening 131. A protective rubber sleeve 2 is connected to the housing sleeve 13. The protective rubber sleeve 2 includes an injection-molded part 21 located inside the housing sleeve 13. The protective rubber sleeve 2 includes an external connecting part 22 that extends out from the wire harness opening 131. The injection-molded part 21 is nano-injection molded to the housing sleeve 13. A wire harness unit 3 is connected inside the protective rubber sleeve 2.

[0034] In existing technologies, pressure transmitters are electronic devices that can detect the pressure of different media. They convert the sensed media pressure into electrical signals, which are then transmitted to external display and control devices. The detected media and environments are complex and diverse, and integrated MEMS pressure transmitters can operate for extended periods in harsh environments. Currently, most pressure transmitters in the industry use a connector-housing connection via riveting. In harsh environments, prolonged operation exposes these connections to the risk of rainwater and dust ingress, leading to communication abnormalities and unreliable long-term effectiveness and stability. Conventional MEMS pressure transmitters use a riveted connection between the connector and the transmitter housing. However, in corrosive environments, corrosive gases and liquids can easily enter the transmitter cavity through this connection, damaging the electrical signal. While adding O-rings and applying adhesive to the connector-housing connection provides short-term protection, the adhesive and O-rings are susceptible to corrosion and water erosion in the long run, leading to transmitter failure. Therefore, to address the aforementioned issues, this application eliminates the sealing ring and riveting encapsulation method, and instead divides the housing assembly 1 into three parts: a connector 12, a housing sleeve 13, and a welding seat 11. The welding seat 11 is positioned between the connector 12 and the housing sleeve 13, and is welded to both the connector and the housing sleeve 13. This ensures the sealing performance and connection stability of the housing assembly 1, reducing the infiltration of external media. Furthermore, a wire harness opening 131 is provided on the housing sleeve 13, and a sensing component 4 is disposed inside the housing sleeve 13. The sensing component 4 is connected to the wire harness unit 3. The wire harness unit 3 needs to pass through the wire harness opening 131. A protective sleeve 2 is connected to the wire harness opening 131. Part of the protective sleeve 2 is located inside the housing sleeve 13, and the other part passes through the wire harness opening 131 and is located on the outer area of ​​the housing sleeve 13. The part inside the housing sleeve 13 is the injection molding part 21, and the part outside the housing sleeve 13 is the external connection part 22. The injection molding part 21 and the housing sleeve 13 are connected by nano-injection molding, which ensures the reliability of the connection between the protective sleeve 2 and the housing sleeve 13. The wire harness unit 3 is connected inside the protective sleeve 2, which improves the protection effect of the wire harness unit 3.

[0035] The welding seat 11 includes a stepped bending section 111, with the joint portion and the housing sleeve 13 respectively connected on both sides of the stepped bending section. The welding seat 11 has a stepped bending section with a stepped structure, and the stepped bending section 111 forms a stepped structure on both sides. The joint portion 12 and the housing sleeve 13 are connected on both sides of the stepped bending section 111. The stepped structure can form a limiting constraint effect on the joint portion 12 and the housing sleeve 13, ensuring the stability and relative position during the welding process, and increasing the contact area, thereby ensuring the reliability of the connection.

[0036] The wire harness unit 3 and the protective sleeve 2 are injection molded as a single unit. This integrated injection molding structure improves connection stability, ensures a tight seal for protection, and reduces the risk of external media entering the interior.

[0037] The structure described above in this embodiment ensures the sealing effect of the pressure transmitter, reduces the risk of external media entering the housing sleeve, and guarantees the stability of the device; it also improves the placement stability of the internal sensing components, protects the device for stable operation, and improves the detection quality.

[0038] In addition to the above embodiments, within the scope disclosed in the claims and description of this utility model, the technical features of this utility model can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative effort. Therefore, these embodiments not described in detail in this utility model should also be regarded as specific embodiments of this utility model and within the protection scope of this utility model.

Claims

1. An integrated pressure transmitter, characterized in that, The device includes a housing assembly, which includes a welding base. One end of the welding base is welded with a connector, and the other end is welded with a housing sleeve. The housing sleeve has a wire harness opening at the end away from the connector. A protective sleeve is connected to the housing sleeve. The protective sleeve includes an injection-molded part located inside the housing sleeve and an external connecting part extending from the wire harness opening. The injection-molded part is nano-injection molded onto the housing sleeve, and a wire harness unit is connected inside the protective sleeve.

2. The integrated pressure transmitter according to claim 1, characterized in that, The welding seat includes a stepped bending section, with the joint portion and the housing sleeve respectively on both sides of the stepped bending section.

3. The integrated pressure transmitter according to claim 1, characterized in that, The welding seat includes an opening seat located inside the housing sleeve, and a sensing component is connected to the opening seat. The sensing component is connected to a wiring harness unit.

4. The integrated pressure transmitter according to claim 3, characterized in that, The sensing component includes a fixed base, the fixed base includes a metal outer ring, and the metal outer ring is laser welded to the open seat.

5. The integrated pressure transmitter according to claim 4, characterized in that, The outer metal ring includes a protruding ring disposed near the opening seat, the opening seat includes a reserved opening, and the protruding ring is connected to the reserved opening.

6. The integrated pressure transmitter according to claim 3, characterized in that, The sensing component includes a fixed base, the fixed base includes a glass inner ring, the glass inner ring is connected to a PIN pin, both ends of the PIN pin extend out of the glass inner ring and are respectively connected to a chip unit and a circuit board, the chip unit and the circuit board are disposed on both sides of the glass inner ring.

7. An integrated pressure transmitter according to claim 6, characterized in that, A ceramic substrate is disposed between the chip unit and the inner glass ring, and the ceramic substrate has a substrate opening that allows the PIN pin to pass through.

8. An integrated pressure transmitter according to claim 6, characterized in that, An insulating gasket is provided between the circuit board and the inner glass ring, and the insulating gasket has a gasket opening that allows the PIN pin to pass through.

9. An integrated pressure transmitter according to claim 6, characterized in that, The circuit board is equipped with a conditioning and amplification circuit. One end of the conditioning and amplification circuit is connected to a PIN pin, and the other end of the conditioning and amplification circuit is connected to a wire harness unit.

10. An integrated pressure transmitter according to claim 1, characterized in that, The wiring harness unit and the protective sleeve are injection molded as a single unit.

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