Pressure sensor

Abstract

The utility model provides a pressure sensor. The pressure sensor comprises a first housing, a wiring terminal, a second housing and a pressure detection unit. The first shell comprises a first end and a first cavity which is far away from the first end and is integrally formed with the first shell; the wiring terminal is arranged in the first shell, and one end of the wiring terminal is exposed out of the first end of the first shell; the second shell and the first shell are installed in a matched mode, a channel penetrating through the second shell is formed in the second shell, and the channel communicates with the first cavity; the pressure detection unit is accommodated in the first cavity and is electrically connected with the wiring terminal; the pressure sensor provided by the utility model has the advantages of simple structure, convenience in assembly and low manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a pressure sensor. Background Art

[0002] A pressure sensor is a device that detects the pressure of a medium and converts it into an electrical signal output, such as the pressure of a gas or liquid; pressure sensors are generally divided into several types: strain gauge sensors, capacitive sensors, piezoelectric sensors, and diaphragm sensors.

[0003] However, the existing pressure sensors have technical problems such as complex structure, complicated installation steps and high manufacturing cost, which means that the existing pressure sensors need to be improved. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a pressure sensor with a simple structure, easy assembly and low manufacturing cost.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a pressure sensor, including a first shell, a wiring terminal, a second shell and a pressure detection unit; the first shell includes a first end and a first cavity away from the first end and integrally formed with the first shell; the wiring terminal is arranged in the first shell and one end is exposed at the first end of the first shell; the second shell is adapted to be installed with the first shell, and a channel passing through the second shell is arranged on the second shell, and the channel is connected to the first cavity; the pressure detection unit is accommodated in the first cavity and electrically connected to the wiring terminal.

[0006] In one embodiment of the utility model, a step portion is provided in the first cavity, and the step portion and the cavity wall of the first cavity form a receiving groove whose shape is adapted to the pressure detection unit. The pressure detection unit is arranged in the receiving groove, and the bottom end of the pressure detection unit abuts against the end face of the second shell.

[0007] In an embodiment of the present invention, a limiting structure is provided at the first cavity of the first shell, and the limiting structure is configured to be able to keep the pressure detection unit located in the first cavity in the first cavity.

[0008] In an embodiment of the present invention, the limiting structure is a plurality of elastic protrusions evenly arranged along the edge of the first cavity, and the elastic protrusions are arranged to protrude toward the inner side of the first cavity.

[0009] In an embodiment of the present invention, a groove for avoiding the elastic protrusion is provided on the second shell.

[0010] In an embodiment of the present invention, a first sealing ring is provided between the pressure detection unit and the second shell end surface, and one end of the channel close to the first cavity is located within the enclosed area of ​​the first sealing ring.

[0011] In an embodiment of the present invention, a sealing groove for installing a first sealing ring is provided on the end surface of the second shell close to the first shell, and a pressure chamber is formed in the area enclosed by the sealing groove.

[0012] In an embodiment of the present invention, a second connection portion for connecting to a device under test is provided at one end of the second housing away from the first housing;

[0013] A second sealing ring is sleeved on the second connecting portion, and the second sealing ring is used to seal the connecting point between the second housing and the device to be detected.

[0014] In an embodiment of the utility model, a connecting seat is provided on the first shell, and the first cavity is formed in the connecting seat; a second cavity is provided in the second shell, and the connecting seat is accommodated in the second cavity.

[0015] In one embodiment of the utility model, the connection terminal comprises a pin and a spring with one end electrically connected to the pin;

[0016] The other end of the spring is electrically connected to the pressure detection unit, and the spring is arranged along the installation direction of the first shell and the second shell.

[0017] To sum up, in the present invention, since the first cavity and the first shell are integrally arranged, and the pressure detection unit is directly accommodated in the first cavity, the pressure detection unit can be stably installed after the first shell and the second shell are assembled. Compared with the pressure sensor before the improvement, the pressure detection unit does not need to be installed through a separate mounting bracket, which not only reduces the design and manufacturing of parts, but also reduces the assembly process, thereby improving assembly efficiency and reducing manufacturing costs, so that the pressure sensor has the technical characteristics of simple structure, easy assembly, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the local structure of the utility model before improvement;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the pressure detection unit of the utility model assembled into the first housing;

[0022] Description of component numbers: first shell 1, first end 11, second limiting portion 112, first cavity 12, limiting structure 121, elastic protrusion 1211, first limiting portion 122, connecting seat 13, terminal 2, pin 21, spring 22, second shell 3, second end 30, second connecting portion 301, channel 31, avoidance groove 32, sealing groove 33, pressure chamber 331, elastic limiting portion 34, pressure detection unit 4, pressure detection side 41, component installation side 42, first sealing ring 5, second sealing ring 6, mounting bracket 7. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0024] See also Figures 1 to 3 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0025] See also Figure 1The utility model provides a pressure sensor, including a first shell 1, a wiring terminal 2, a second shell 3 and a pressure detection unit 4; the first shell 1 includes a first end 11 and a first cavity 12 which is away from the first end 11 and is integrally formed with the first shell 1; the wiring terminal 2 is arranged in the first shell 1 and one end is exposed at the first end 11 of the first shell 1; the second shell 3 is adapted to be installed with the first shell 1, and a channel 31 which passes through the second shell 3 is arranged on the second shell 3, and the channel 31 is connected with the first cavity 12; the pressure detection unit 4 is accommodated in the first cavity 12 and is electrically connected with the wiring terminal 2.

[0026] It should be noted that the pressure sensor is a device that detects the pressure of a medium and converts the pressure into an electrical signal for output. The pressure sensor includes a mounting shell, which is an integral body after the first shell 1 and the second shell 3 are assembled. The mounting shell includes a first end 11 and a second end 30. The first end 11 is an end of the first shell 1 away from the second shell 3. The first end 11 is generally used for communication connection with an external device or the connection terminal 2 is connected to a corresponding device. The pressure detection unit 4 is connected to an external device for communication or electrical connection through the connection terminal 2; the second end 30 is an end of the second shell 3 away from the first shell 1, and the second end 30 is used to connect to the device to be measured. The first cavity 12 is arranged in the mounting shell, and the channel 31 passes through the second end 30 and is connected to the first cavity 12; the first shell 1 and the second shell 3 are adapted to be installed along a first direction, and the first direction is the connection direction of the first end 11 and the second end 30. The pressure detection unit 4 includes a pressure detection side 41 and a component installation side 42, the pressure detection side 41 faces the channel 31, and the component installation side 42 faces the connection terminal 2.

[0027] See also Figure 1-2, which is an embodiment of the pressure sensor of this case before improvement, but does not represent the prior art. The installation order of the pressure sensor is to first install the first sealing ring 5 and the pressure detection unit 4 on the mounting bracket 7, then install the mounting bracket 7 and the first shell 1 together, and finally install the second shell 3. On the one hand, it is necessary to manufacture a mounting bracket 7 separately, which increases the manufacturing cost. On the other hand, it is necessary to install the first sealing ring 5 and the pressure detection unit 4 on the mounting bracket 7 separately, which increases the assembly steps, thereby reducing the assembly efficiency of the pressure sensor and increasing the manufacturing cost. In this case, since the first cavity 12 and the first shell 1 are integrally arranged, and the pressure detection unit 4 is directly accommodated in the first cavity 12, the pressure detection unit 4 can be stably installed after the first shell 1 and the second shell 3 are assembled. Compared with the pressure sensor before improvement, the pressure detection unit 4 does not need to be installed through a separate mounting bracket 7, which reduces the design and manufacture of parts and reduces the assembly process, thereby improving the assembly efficiency and reducing the manufacturing cost, and has a high practical application value.

[0028] See also Figure 1-2 In one embodiment of the utility model, a step portion 122 is provided in the first cavity 12, and the step portion 122 and the cavity wall of the first cavity 12 form a receiving groove whose shape is adapted to the pressure detection unit 4. The pressure detection unit 4 is arranged in the receiving groove, and the bottom end of the pressure detection unit 4 abuts against the end face of the second shell 3.

[0029] It should be noted that the step portion 122 and the inner wall of the first cavity 12 are of an integral design, and the bottom end of the pressure detection unit 4 is the pressure detection side 41 of the pressure detection unit 4; the step portion 122 is configured to be able to limit the axial direction and radial direction of the bottom end of the pressure detection unit 4, and the axial direction is the assembly direction of the first shell 1 and the second shell 3, that is, the aforementioned first direction, and is the direction pointing to the first shell 1; it should be understood that after the first shell 1 and the second shell 3 are assembled, at least part of the structure of the component installation side 42 of the pressure detection unit 4 is in contact with the inner wall of the first shell 1 and limited; at least part of the structure of the pressure detection side 42 of the pressure detection unit 4 is in contact with the end face of the second shell 3, as long as the pressure detection unit 4 can be stably limited after the first shell 1 and the second shell 3 are assembled. Since both sides and edges of the pressure detection unit 4 are limited by abutment, the pressure detection unit 4 installed between the first shell 1 and the second shell 3 can be stably installed, and loosening of the pressure detection unit 4 relative to the first shell 1 and the second shell 3 can be avoided or reduced, thereby improving the accuracy of the pressure detection unit 4 in detecting the medium pressure, and improving the accuracy of the pressure sensor in detecting pressure; it should be understood that when a first sealing ring 5 is provided between the pressure detection side 41 of the pressure detection unit 4 and the end face of the second shell 3, this side of the pressure detection unit 4 can also be set to abut against the end face of the second shell 3 through the first sealing ring 5, so that the end face of the second shell 3 does not need to be directly set to abut against the pressure detection side 41 of the pressure detection unit 4.

[0030] See also Figure 1 and 3 As an optional embodiment of the present utility model, a limiting structure 121 is provided at the first cavity 12 of the first shell 1 , and the limiting structure 121 is configured to be able to keep the pressure detection unit 4 located in the first cavity 12 in the first cavity 12 .

[0031] It should be noted that the limiting structure 121 is a protrusion or a recess. The limiting structure 121 can be arranged on the inner wall of the first cavity 12, or on the opening edge of the first cavity 12. When the limiting structure 121, which is a protrusion or a recess, is arranged on the inner wall of the first cavity 12, a snap-fit ​​limiting structure adapted to the protrusion or recess can be arranged on the side wall of the pressure detection unit 4 to adapt and fix the pressure detection unit 4; it should be understood that a plug-in structure adapted to be installed with the pressure detection unit 4 can also be arranged at the bottom of the first cavity 12, such as a plug-in rod is arranged on the pressure detection unit 4, and a plug-in hole adapted to the plug-in rod is arranged at the bottom of the first cavity 12 to achieve installation. The limiting of the pressure detection unit 4 in the first cavity 12 only requires that the limiting structure 121 can keep the pressure detection unit 4 in the first cavity 12 in the first cavity 12. The purpose of setting the limiting structure 121 is, on the one hand, to avoid the risk of the pressure detection unit 4 falling and being damaged due to the inverted first shell 1 after the pressure detection unit 4 is assembled, thereby helping to reduce the damage rate during assembly. On the other hand, due to the setting of the limiting structure 121, the pressure detection unit 4 can be pre-limited after assembly, thereby avoiding the problem of the pressure detection unit 4 falling out and needing to be reassembled, resulting in reduced assembly efficiency, thereby improving the assembly efficiency.

[0032] See also Figure 1 and 3 As an optional embodiment of the present invention, the limiting structure 121 is a plurality of elastic protrusions 1211 evenly arranged along the edge of the first cavity 12 , and the elastic protrusions 1211 are protruded toward the inside of the first cavity 12 .

[0033] It should be noted that the elastic protrusion 1211 is in the shape of a barb or other shape that meets the requirements of use. Generally, three, four or more elastic protrusions 1211 are arranged and are evenly arranged along the edge of the first cavity 12. Through the arrangement of the elastic protrusion 1211, the pressure detection unit 4 assembled in the first cavity 12 can be maintained in the first cavity 12, thereby preventing the assembled pressure detection unit 4 from falling and being damaged.

[0034] See also Figure 1 As an optional embodiment of the present invention, the second shell 3 is provided with an avoidance groove 32 for avoiding the elastic protrusion 1211 .

[0035] It should be noted that the avoidance groove 32 is arranged on the inner end surface of the second shell 3 facing the first shell 1; since the elastic protrusion 1211 on the first shell 1 protrudes out of the lower end of the first shell 1, the avoidance groove 32 for avoiding the elastic protrusion 1211 is arranged on the second shell 3 to facilitate the smooth installation between the first shell 1 and the second shell 3. At the same time, the cooperation between the avoidance groove 32 and the elastic protrusion 1211 can also limit the first shell 1 and the second shell 3 in the radial direction to a certain extent, avoid or reduce the relative displacement of the first shell 1 and the second shell 3 in the radial direction, wherein the axial direction is the assembly direction of the first shell 1 and the second shell 3.

[0036] See also Figure 1 As an optional embodiment of the utility model, a first sealing ring 5 is provided between the pressure detection unit 4 and the end surface of the second shell 3 , and one end of the channel 31 close to the first cavity 12 is located in the enclosed area of ​​the first sealing ring 5 .

[0037] It should be noted that, through the provision of the first sealing ring 5, on the one hand, it is possible to avoid hard squeezing of the pressure detection unit 4 during assembly of the first shell 1 and the second shell 3, which may cause the pressure detection unit 4 to be squeezed and damaged; on the other hand, it is possible to improve the sealing between the pressure detection unit 4 and the second shell 3, thereby avoiding the problem of inaccurate pressure detection caused by internal leakage of the medium in the channel 31 when it flows toward the pressure detection unit 4, thereby ensuring the accuracy of the pressure sensor detection, wherein the medium is gas, liquid or other flowing fluid.

[0038] See also Figure 1 As an optional embodiment of the utility model, a sealing groove 33 for installing a first sealing ring 5 is provided on the end face of the second shell 3 close to the first shell 1, and the first sealing ring 5 is arranged in contact with the inner wall of the sealing groove 33, and a pressure chamber 331 is formed in the area enclosed by the sealing groove 33 between the pressure detection unit 4 and the end face of the second shell 3.

[0039] It should be noted that, through the setting of the sealing groove 33, on the one hand, it is used to limit the first sealing ring 5 to ensure the stable position of the first sealing ring 5, and on the other hand, it can cooperate with the first sealing ring 5 to improve the sealing between the pressure detection unit 4 and the second shell 3. At the same time, a pressure chamber 331 is formed in the area enclosed by the sealing groove 33 between the pressure detection unit 4 and the end face of the second shell 3, wherein the projection area of ​​the pressure chamber 331 projected on the pressure detection unit 4 is larger than the projection area of ​​the channel 31 projected on the pressure detection unit 4, and the medium flowing in from the channel 31 fills the entire pressure chamber 331 and forms pressure on the pressure detection unit 4, so that the pressure detection unit 4 can fully perceive the medium pressure, thereby improving the detection accuracy of the pressure sensor.

[0040] See also Figure 1 As an optional embodiment of the present utility model, the second housing 3 is provided with a second connecting portion 301 for connecting to a device under test at the first end 11 away from the first housing 1;

[0041] The second connection portion 301 is sleeved with a second sealing ring 6 , and the second sealing ring 6 is used to seal the connection point between the second housing 3 and the device to be detected.

[0042] It should be noted that the second shell 3 is connected to the device under test via the second connecting portion 301. By setting an annular groove at the second connecting portion 301, the position of the second sealing ring 6 can be limited to ensure that the installation position of the second sealing ring 6 is fixed. By setting the second sealing ring 6, leakage of the medium between the second shell 3 and the device under test can be avoided, thereby ensuring the smooth progress of pressure detection and the safety of the detection process.

[0043] See also Figure 1 As an optional embodiment of the utility model, the second connecting portion 301 is a threaded segment arranged on the axial surface of the second shell 3. On the one hand, the second shell 3 is threadedly connected to the device to be tested through the threaded segment, and the threaded connection provides good sealing performance, which can prevent medium leakage to a certain extent, improve the sealing of the connection, and cooperate with the second sealing ring 6 to improve the accuracy of pressure measurement. At the same time, the design of the threaded connection enables the pressure sensor to be easily and quickly installed on the device to be tested, and is convenient to disassemble, and the threaded interface occupies a small space, has a compact structure, and has a high mechanical connection strength.

[0044] See also Figure 1 As an optional embodiment of the utility model, a connecting seat 13 is provided on the first shell 1, and the first cavity 12 is formed in the connecting seat 13; a second cavity is provided in the second shell 3, and the connecting seat 13 is accommodated in the second cavity.

[0045] It should be noted that, by making the second cavity of the second shell 3 cover the connecting seat 13 having the first cavity 12, on the one hand, the first shell 1 and the second shell 3 can be adapted to be installed and easy to install; on the other hand, better sealing can be formed between the first shell 1 and the second shell 3. The first shell 1 and the second shell 3 can be connected by screws, or connected by clamping or fixed by bonding.

[0046] See also Figure 1As an optional embodiment of the utility model, an elastic limiting portion 34 is provided on the second shell 3, and the elastic limiting portion 34 extends from the edge of the second cavity of the second shell 3 toward the rotation center of the second cavity to achieve a snap connection with the connecting seat 13. The connection between the first shell 1 and the second shell 3 can be achieved without screws, which is simple and convenient.

[0047] See also Figure 1 As an optional embodiment of the utility model, the wiring terminal 2 includes a pin 21 and a spring 22 with one end electrically connected to the pin 21;

[0048] The other end of the spring 22 is electrically connected to the pressure detection unit 4 , and the spring 22 is arranged along the installation direction of the first housing 1 and the second housing 3 .

[0049] It should be noted that the pin 21 is L-shaped, the first end 11 of the first shell 1 is a tubular structure, one end of the L-shaped pin 21 is connected to the spring 22, and the other end of the pin 21 extends into the first end 11 of the tubular structure of the first shell 1 to facilitate communication with an external device; the spring 22 is a conductive material, such as copper or iron or an alloy; through the setting of the spring 22, the pressure detection unit 4 can be elastically connected to the pin 21 in the first cavity 12, and the stability of the electrical connection is ensured.

[0050] See also Figure 1 As an optional embodiment of the present utility model, the first end 11 of the first shell 1 is a connector, the wiring terminal 2 is arranged in the connector, and the connector is provided with a second limiting portion 112 for adapting and limiting with an external device.

[0051] It should be noted that the second limiting portion 112 can be a protrusion that fits into a recess provided on an external device, or the second limiting portion 112 can be a recess that fits into a protrusion provided on an external device. Since the second end 30 of the pressure sensor is threadedly connected to the device to be tested, the first end 11 of the first shell 1 is more suitable for communicating with the external device using a connector, and the pin 21 located in the connector is protected by the connector.

[0052] See also Figure 1 As an optional embodiment of the utility model, a temperature sensor or a temperature sensing element, such as a thermistor, is disposed in the channel 31 or the pressure chamber 331. The thermistor extends from the first end 11 of the first shell 1 through a wire to communicate with an external device, so that the pressure sensor also has the function of a temperature sensor.

[0053] Among them, the equipment to be tested mainly refers to the medium system or equipment that needs to be monitored for pressure and temperature, such as medium pipelines, gas pipelines, storage tanks, automobile engines, aircraft engines, turbines, water pumps, compressors, regulating valves, boilers, heat exchangers, cooling towers, etc.; and the external equipment mainly refers to the equipment used to receive, process and display sensor outputs, such as automatic control systems, monitoring systems, etc., which are used to monitor and control the pressure and temperature of the medium system in real time; computers or data recorders are used to record, analyze and store sensor output data, displays or indicators are used to display the pressure and temperature values ​​or graphs output by the sensor, and alarms or alarm devices are used to send alarm signals when the set range is exceeded.

[0054] As an optional embodiment of the utility model, the pressure detection unit 4 is an inductive element on a strain gauge sensor, a capacitive sensor, a piezoelectric sensor or a diaphragm sensor; the strain gauge sensor detects pressure by measuring the tiny deformation of the material surface caused by force; the capacitive sensor detects pressure by measuring the change in the distance between two conductive plates (plates of the capacitor), and the change in this distance will cause a change in capacitance; the piezoelectric sensor utilizes the property that certain materials will generate electric charge when subjected to pressure; the diaphragm sensor includes a bendable diaphragm, and the pressure change will cause the diaphragm to move, and this displacement can be converted into an electrical signal.

[0055] In summary, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A pressure sensor, characterized in that: include: A first shell, comprising a first end and a first cavity away from the first end and integrally formed with the first shell; A connection terminal, disposed in the first housing and having one end exposed at the first end of the first housing; A second shell is adapted to be installed with the first shell, and a passage penetrating the second shell is provided, and the passage is communicated with the first cavity; The pressure detection unit is accommodated in the first cavity and electrically connected to the wiring terminal.

2. The pressure sensor according to claim 1, characterized in that: A step portion is provided in the first cavity, and the step portion and the cavity wall of the first cavity form a receiving groove whose shape is adapted to the pressure detection unit. The pressure detection unit is arranged in the receiving groove, and the bottom end of the pressure detection unit abuts against the end face of the second shell.

3. The pressure sensor according to claim 1, characterized in that: A limiting structure is disposed at the first cavity of the first shell, and the limiting structure is configured to be able to keep the pressure detection unit located in the first cavity in the first cavity.

4. The pressure sensor according to claim 3, characterized in that: The limiting structure is a plurality of elastic protrusions evenly arranged along the edge of the first cavity, and the elastic protrusions are arranged to protrude toward the inner side of the first cavity.

5. The pressure sensor according to claim 4, characterized in that: The second shell is provided with a groove for avoiding the elastic protrusion.

6. The pressure sensor according to claim 1, characterized in that: A first sealing ring is disposed between the pressure detection unit and the second shell end surface, and one end of the channel close to the first cavity is located within the enclosed area of ​​the first sealing ring.

7. The pressure sensor according to claim 6, characterized in that: The end surface of the second shell close to the first shell is provided with a sealing groove for installing a first sealing ring, and a pressure chamber is formed in the area enclosed by the sealing groove.

8. The pressure sensor according to claim 1, characterized in that: A second connecting portion for connecting to a device under test is provided at one end of the second housing away from the first housing; A second sealing ring is sleeved on the second connecting portion, and the second sealing ring is used to seal the connecting point between the second housing and the device to be detected.

9. The pressure sensor according to claim 1, characterized in that: A connecting seat is arranged on the first shell, and the first cavity is formed in the connecting seat; a second cavity is arranged in the second shell, and the connecting seat is accommodated in the second cavity.

10. The pressure sensor according to claim 1, characterized in that: The connection terminal comprises a pin and a spring with one end electrically connected to the pin; The other end of the spring is electrically connected to the pressure detection unit, and the spring is arranged along the installation direction of the first shell and the second shell.

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