CN220251237U - Ceramic pressure sensor - Google Patents

Abstract

The utility model belongs to the technical field of pressure sensors, and particularly provides a ceramic pressure sensor which comprises a shell, a pressure sensing element, a circuit board and an electric connector, wherein the shell and the electric connector are enclosed to form a containing cavity, the pressure sensing element and the circuit board are both arranged in the containing cavity, and the pressure sensing element is connected with a signal processing circuit of the circuit board. The utility model aims to provide a ceramic pressure sensor capable of being directly connected with a Hermite joint, so that the manufacturing cost and the process difficulty are reduced.

Description

Ceramic pressure sensor

Technical Field

The utility model belongs to the technical field of pressure sensors, and particularly relates to a ceramic pressure sensor.

Background

Sensor technology is one of the important technologies of modern measurement and automation systems, and almost every technology is independent of the sensor from process control of production to modern technological life. The ceramic capacitive pressure sensor is a common pressure sensor type, has the advantages of moderate cost, wide range, good temperature characteristics, consistency, long-term stability and the like, and is widely applied to the fields of automobiles, industrial control and the like. In industrial applications, a hessian connector is often used as an electrical connection, which is not well matched with a conventional electrical connector of a ceramic capacitive pressure sensor, and a transfer connection is required to be used as a connection, so that the cost and the manufacturing difficulty are increased.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a ceramic pressure sensor, so that the pressure ceramic sensor can be directly connected with a Hermite joint, and the manufacturing cost and the process difficulty are reduced.

The utility model is realized in the following way:

the utility model provides a ceramic pressure sensor, which comprises a shell, a pressure sensing element, a circuit board and an electric connector, wherein the shell and the electric connector are enclosed into a containing cavity, the pressure sensing element and the circuit board are both arranged in the containing cavity, and the pressure sensing element is connected with a signal processing circuit of the circuit board.

Preferably, the number of the pins is four, one pin is a positioning pin which can be matched with the Heremann joint, the other three pins are metal pins which can be electrically connected with the Heremann joint, and the metal pins are electrically connected with the signal processing circuit of the circuit board.

Preferably, the metal pin includes a first plug portion electrically connectable with the hessian connector, a second plug portion electrically connected with the signal processing circuit, and a connection portion connecting the first plug portion and the second plug portion, wherein the connection portion extends in a radial direction of the electrical connector and the second plug portion is close to a center of the electrical connector with respect to the first plug portion.

Preferably, the electrical connector is provided with an internal threaded hole, and an opening of the internal threaded hole is positioned on an end face of the electrical connector where the pin is provided.

Preferably, the internal thread hole is located in an annular interior formed by enclosing each pin.

Preferably, the surface of the pin is plated with a tin layer.

Preferably, the housing has a first chamber and a second chamber, the first chamber and the electrical connector enclose to form the accommodating cavity, an annular groove is formed in the bottom of the first chamber, an annular sealing member is arranged in the annular groove, the annular sealing member protrudes out of the bottom of the first chamber and supports the pressure sensing element, the second chamber is communicated with the first chamber through a medium hole, and an opening of the medium hole is formed in the bottom of the first chamber and is located at the inner side of the annular sealing member.

Preferably, the second chamber is provided with a second boss for cooperation with an external mechanism.

Preferably, the second chamber is provided with an internal thread for connection to an external mechanism.

Preferably, an external thread is provided on the outer surface of the housing on the side close to the second chamber.

The utility model has the following beneficial effects:

the electrical connector in the pressure ceramic sensor provided by the utility model is provided with the contact pin structure, and the contact pin structure can be directly connected with the Hertmann connector without switching, so that the process steps are reduced, the cost is reduced, and the efficiency is improved.

Drawings

Fig. 1-6 are schematic diagrams of a ceramic pressure sensor according to an embodiment of the present utility model.

Reference numerals illustrate: 1. a housing; 2. a seal; 3. a pressure sensing element; 4. a circuit board; 5. an electrical connector; 6. a contact pin; 7. an internal threaded hole; 8. a first chamber; 9. a second chamber; 10. an annular groove; 11. a first boss; 12. a second boss; 13. a dielectric hole; 14. an internal thread; 15. an external thread; 61. positioning the contact pin; 62. a metal pin; 621. a first plug-in connection; 622. a second plug-in connection; 623. and a connecting part.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Referring to fig. 1-6, an embodiment of the present utility model provides a ceramic pressure sensor, which includes a housing 1, a pressure sensing element 3, a circuit board 4 and an electrical connector 5, wherein the housing 1 and the electrical connector 5 enclose a housing cavity, and the pressure sensing element 3 and the circuit board 4 are both disposed in the housing cavity. Preferably, the pressure sensing element 3, the circuit board 4 and the electrical connector 5 are mounted in the housing cavity in a mechanical pressure mode. Optionally, the casing 1 fixes the pressure sensing element 3, the circuit board 4 and the electrical connector 5 by riveting. The pressure sensing element 3 is connected to the signal processing circuit of the circuit board 4, the electrical connector 5 is provided with a plurality of pins 6 which can be connected with a Hertmann connector, and at least part of the pins 6 are electrically connected with the signal processing circuit of the circuit board 4. The ceramic pressure sensor provided by the embodiment of the utility model receives an external pressure signal, the pressure sensing element 4 converts the received external pressure signal into an electric signal, and the signal processing circuit of the circuit board 4 processes the electric signal representing the external pressure signal and transmits the processed electric signal to the Hertmann joint through the electric connector 5.

In one embodiment of the present utility model, the number of pins is 4, where one pin is a positioning pin 61 that can be matched with the hessian connector, so as to perform positioning in the docking with the hessian connector, and prevent connection errors. The other three pins are metal pins 62 which can be electrically connected with the Hermite connector, and the metal pins 62 are electrically connected with a signal processing circuit of the circuit board and used for transmitting pressure electric signals. Preferably, the metal pin 62 includes a first plug portion 621 electrically connectable with the hessian connector, a second plug portion 622 electrically connected with the signal processing circuit, and a connection portion 623 connecting the first plug portion 621 and the second plug portion 622, wherein the connection portion 623 extends in a radial direction of the electric connector 5 (a direction perpendicular to a direction in which the electric connector is provided with the pin end face) and the second plug portion 622 is close to a center of the electric connector 5 (a geometric center axis of the electric connector 5) with respect to the first plug portion 621, wherein the first plug portion 621 is provided with a groove for matching with the hessian connector. Preferably, the metal pins 62 are designed as above-described because the radial plane area of the circuit board 4 is small, so that the space between the first plugging portions 621 of the metal pins 62 can be relatively large.

Preferably, the electrical connector 5 is an injection molding piece, and each pin and the electrical connector 5 are integrally injection molded, so that the stability of installation between the pin and the electrical connector can be ensured. Because the positions of the contact pin and the electric connector 5 are fixed after injection molding, both ends of the contact pin should be respectively extended out of the electric connector 5 during injection molding, one end of the contact pin extends out of the external Hertmann connector, and the other end of the contact pin can be electrically connected with a signal processing circuit of a circuit board. In one embodiment, the second plugging portion 622 of the metal pin 62 is soldered to the circuit board 4, the surface of the metal pin 62 is plated with a tin layer, and the soldering between the second plugging portion 622 and the circuit board 4 is more firm and will not fall off when used in a vibration environment.

Preferably, the electrical connector 5 is provided with an internally threaded hole 7, and an opening of the internally threaded hole 7 is located on an end face of the electrical connector 5 where the pin 6 is provided. The internally threaded hole 7 can be connected with a Hermite joint through bolts, and plays a role in fixing the Hermite joint. Preferably, the internal threaded hole 7 is located in an annular interior formed by enclosing each pin.

In one embodiment of the present utility model, the housing has a first chamber 8 and a second chamber 9, the first chamber 8 and the electrical connector 5 enclose to form the accommodating cavity, an annular groove 10 is formed at the bottom of the first chamber 8, an annular sealing member 2 is disposed in the annular groove 10, the annular sealing member 2 protrudes out of the bottom of the first chamber 8 and supports the pressure sensing element 3, the second chamber 9 is provided with a second boss 12 matched with an external mechanism, the second chamber 9 is communicated with the first chamber 8 through a dielectric hole 13, and an opening of the dielectric hole 13 is disposed at the bottom of the first chamber 8 and is located at the inner side of the annular sealing member 2. Wherein the second chamber 9 is arranged as an external medium channel. When the ceramic pressure sensor detects pressure, the internal element of the external mechanism is contacted and extruded with the second boss, external medium enters the external medium channel and enters the accommodating cavity through the medium hole, and after the pressure element senses the external medium, an external pressure signal can be converted into an electric signal. In the above structure, the sealing member 2 can isolate the external medium from the circuit board 4, preventing the circuit from being corroded by the external medium. Preferably, said second chamber 9 is provided with internal threads 14 for connection with external means to connect and fix the external means. Preferably, the outer surface of the side of the housing 1 close to the second chamber 9 is provided with external threads 15 for connecting and fixing external means.

The utility model belongs to the technical field of pressure sensors, and particularly provides a ceramic pressure sensor which comprises a shell, a pressure sensing element, a circuit board and an electric connector, wherein the shell and the electric connector are enclosed to form a containing cavity, the pressure sensing element and the circuit board are arranged in the containing cavity, the pressure sensing element is connected with a signal processing circuit of the circuit board, a plurality of contact pins capable of being connected with a Hertmann connector are arranged on the electric connector, and at least part of the contact pins are electrically connected with the signal processing circuit of the circuit board. The utility model provides a ceramic pressure sensor capable of being directly connected with a Hermite joint, which reduces the manufacturing cost and the process difficulty.

The foregoing examples are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model, and all designs that are the same or similar to the present utility model are within the scope of the present utility model.

Claims (10)

1. The utility model provides a pottery pressure sensor, includes casing, pressure sensing element, circuit board and electric connector, the casing with electric connector encloses into one and holds the cavity, pressure sensing element with the circuit board is all installed in acceping the cavity, pressure sensing element connect in signal processing circuit of circuit board, its characterized in that is provided with many contact pins that can be connected with the Hermite joint on the electric connector, and wherein at least part the contact pin is connected with the signal processing circuit electricity of circuit board.

2. The ceramic pressure sensor of claim 1, wherein four pins are provided, one of the pins is a positioning pin matable with a hessian connector, and the other three pins are metal pins electrically connectable with the hessian connector, and the metal pins are all electrically connected with signal processing circuitry of a circuit board.

3. The ceramic pressure sensor of claim 2, wherein the metal pin comprises a first mating portion electrically connectable to a hessian connector, a second mating portion electrically connected to the signal processing circuit, and a connecting portion connecting the first and second mating portions, wherein the connecting portion extends in a radial direction of the electrical connector and the second mating portion is proximate a center of the electrical connector relative to the first mating portion.

4. A ceramic pressure sensor as claimed in claim 1 wherein said electrical connector is provided with an internally threaded bore, the opening of said internally threaded bore being located on the end face of said electrical connector on which said pin is disposed.

5. The ceramic pressure sensor of claim 4 wherein said internally threaded bore is located within an annular interior defined by each of said pins.

6. A ceramic pressure sensor as claimed in claim 1, wherein the pin surface is plated with a tin layer.

7. The ceramic pressure sensor according to claim 1, wherein the housing has a first chamber and a second chamber, the first chamber and the electrical connector are enclosed to form the accommodating cavity, an annular groove is formed in the bottom of the first chamber, an annular sealing member is disposed in the annular groove, the annular sealing member protrudes out of the bottom of the first chamber and supports the pressure sensing element, the second chamber is communicated with the first chamber through a dielectric hole, and one end opening of the dielectric hole is formed in the bottom of the first chamber and is located inside the annular sealing member.

8. A ceramic pressure sensor as claimed in claim 7 wherein said second chamber is provided with a second boss for engagement with an external mechanism.

9. A ceramic pressure sensor as claimed in claim 7 wherein said second chamber is provided with internal threads for connection to external means.

10. The ceramic pressure sensor of claim 7 wherein the outer surface of the housing on the side adjacent the second chamber is externally threaded.