CN117686133A

CN117686133A - Pressure sensor electric connector and pressure sensor

Info

Publication number: CN117686133A
Application number: CN202211079924.6A
Authority: CN
Inventors: 冯鹏程; 邱建海; 赵学堂; 黄亚超
Original assignee: Measurement Specialties China Ltd
Current assignee: Measurement Specialties China Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2024-03-12

Abstract

The invention discloses a pressure sensor electric connector and a pressure sensor. The pressure sensor electrical connector includes: a metal shell; a circuit board mounted in the metal case; and a plurality of terminals disposed in the metal case and electrically connected with the circuit board. A raised electrical contact is provided on the circuit board, the electrical contact being in electrical contact with the metal shell such that the circuit board is electrically connected to the metal shell via the electrical contact. In the invention, the circuit board in the electric connector of the pressure sensor is electrically connected to the metal shell, thereby improving the grounding performance of the pressure sensor.

Description

Pressure sensor electric connector and pressure sensor

Technical Field

The invention relates to a pressure sensor electrical connector and a pressure sensor comprising the same.

Background

In the prior art, pressure sensors are of a wide variety and vary widely in structure and performance. In the special fields of rail transit and the like, the grounding performance of the pressure sensor is very high. However, it is difficult for the existing pressure sensor to satisfy such a requirement.

In addition, the pressure diaphragm of the pressure sensor is often easily damaged, and on the one hand, the measured medium contains impurities such as metal scraps, and the pressure diaphragm is damaged. The other side is that the measured medium can generate water hammer effect, and high pressure is instantaneously generated, so that the pressure diaphragm is damaged.

Disclosure of Invention

The present invention is directed to solving at least one of the above-mentioned problems and disadvantages of the prior art.

According to one aspect of the present invention, there is provided a pressure sensor electrical connector comprising: a metal shell; a circuit board mounted in the metal case; and a plurality of terminals disposed in the metal case and electrically connected with the circuit board. A raised electrical contact is provided on the circuit board, the electrical contact being in electrical contact with the metal shell such that the circuit board is electrically connected to the metal shell via the electrical contact.

According to an exemplary embodiment of the present invention, the electrical contact part includes a plurality of arc-shaped contact parts spaced apart in a circumferential direction, and the plurality of arc-shaped contact parts are in electrical contact with the metal shell.

According to another exemplary embodiment of the present invention, a conductive trace electrically interconnecting the plurality of arcuate contacts to each other is formed on the circuit board.

According to another exemplary embodiment of the present invention, the circuit board has a circular shape, and the plurality of arc-shaped contact portions are formed on the top surface of the circuit board and are uniformly spaced around the periphery of the circuit board.

According to another exemplary embodiment of the present invention, an annular positioning step is formed at an inner side of the metal shell, and the plurality of arc-shaped contact portions are abutted against the annular positioning step to be in electrical contact with the metal shell.

According to another exemplary embodiment of the present invention, the plurality of terminals include a ground terminal electrically connected with the metal case such that the circuit board is electrically connected to the metal case via the ground terminal; and other terminals of the plurality of terminals than the ground terminal are electrically isolated from the metal shell.

According to another exemplary embodiment of the present invention, a conductive trace electrically interconnecting the ground terminal and the electrical contact to each other is formed on the circuit board.

According to another exemplary embodiment of the present invention, the metal shell comprises a peripheral wall enclosing an inner cavity and a partition wall dividing the inner cavity into a first cavity and a second cavity; the circuit board is mounted in the first cavity, and the plurality of terminals pass through the partition wall; the ground terminal is welded or riveted to a partition wall of the metal shell, and the other terminals are electrically isolated from the partition wall.

According to another exemplary embodiment of the present invention, the pressure sensor electrical connector further comprises a first insulator disposed in the first cavity of the metal shell for securing the plurality of terminals and electrically isolating the other terminals from the partition wall.

According to another exemplary embodiment of the present invention, the pressure sensor electrical connector further comprises a second insulator mounted in the second cavity of the metal shell, the plurality of terminals being fixed to the second insulator.

According to another exemplary embodiment of the present invention, the second insulating member is an integral injection molded member formed by an insert injection molding process; the plurality of terminals are inserts when the second insulator is injection molded, the second insulator is an injection molded piece such that the second insulator is directly engaged with the plurality of terminals.

According to another exemplary embodiment of the present invention, one end of the metal shell is for interfacing with a housing of a pressure detecting device of a pressure sensor, and the other end of the metal shell is for interfacing with a housing of an electrical connection socket; threads for threaded connection with the housing of the electrical connection socket are formed on the other end of the metal shell.

According to another exemplary embodiment of the present invention, a plurality of terminal insertion holes into which the plurality of terminals are respectively inserted and soldered to be electrically connected with the circuit board are formed on the circuit board.

According to another aspect of the present invention, there is provided a pressure sensor comprising: pressure detection device and pressure sensor electric connector. The pressure detection device includes: a housing having first and second ports opposite in an axial direction thereof; and a pressure detection module provided in the housing for detecting a pressure of an external medium. One end of the metal shell is in butt joint with the first port of the shell, and the circuit board is electrically connected with the pressure detection module.

According to an exemplary embodiment of the invention, the pressure detection module comprises: a module body formed with a receiving chamber for receiving an internal medium; a pressure diaphragm mounted on one opening of the accommodation chamber of the module body for transmitting pressure of an external medium to an internal medium; a pressure detection chip installed in the module body for detecting a pressure of the internal medium; and a sealing cover mounted on the other opening of the accommodation chamber of the module body to seal the other opening.

According to another exemplary embodiment of the present invention, the pressure sensor further comprises a pressure joint. The pressure joint includes: a peripheral wall surrounding a cavity; a bottom wall connected to the bottom of the peripheral wall; and a connecting portion connected to the bottom wall and formed with a passage. A communication hole that communicates the cavity and the passage is formed on the bottom wall so that an external medium can flow from the passage into the cavity via the communication hole; the pressure connector is connected to the pressure detection device, and the pressure diaphragm is located in the cavity and used for transmitting the pressure of the external medium in the cavity to the internal medium.

According to another exemplary embodiment of the present invention, the peripheral wall of the pressure fitting is inserted into and interfaces with a second port of the housing of the pressure detection device; one end of the module body is inserted into the cavity of the pressure fitting and interfaces with the pressure fitting.

According to another exemplary embodiment of the present invention, the channel comprises: a central bore; and an annular groove formed at one end of the central hole. The center hole is communicated with the communication hole through the annular groove, and the inner diameter of the annular groove is larger than that of the center hole, so that the axial section of the channel is T-shaped.

According to another exemplary embodiment of the present invention, the communication hole is adjacent to a peripheral wall of the cavity, and a size of a through-hole between the communication hole and the annular groove is smaller than a diameter of the communication hole; the size of the through-hole is set to a predetermined value to block impurities in an external medium from entering the cavity.

According to another exemplary embodiment of the present invention, a plurality of communication holes are formed on the bottom wall, the plurality of communication holes being circumferentially spaced apart and communicating with the annular groove.

According to another exemplary embodiment of the present invention, a screw portion for screw-coupling with the device under test is formed on the coupling portion, and the pressure joint further includes a flange portion coupled to an outer side of the peripheral wall, the flange portion being adapted to abut against a mounting panel of the device under test; a seal ring mounting groove for mounting a seal ring is formed on a bottom surface of the flange portion, the seal ring being adapted to be pressed between the flange portion and the mounting panel to achieve sealing therebetween.

According to another exemplary embodiment of the present invention, the pressure detection module further comprises: the signal processing circuit is used for processing the pressure signal detected by the pressure detection chip; and a first connector electrically connecting the pressure detection chip to the signal processing circuit. The first connector includes: a first insulating body disposed between the signal processing circuit and the sealing cap; and a plurality of first connection terminals fixed on the first insulating body and penetrating through the sealing cover for electrically connecting the pressure detection chip and the signal processing circuit.

According to another exemplary embodiment of the present invention, the pressure detection module further comprises: a flexible electrical connector having one end electrically connected to the signal processing circuit; and a second connector connected to the other end of the flexible electrical connector and electrically connected to the circuit board. The second connector includes: a second insulating body fixed to the other end of the flexible electrical connector; and a plurality of second connection terminals fixed on the second insulating body for electrically connecting the signal processing circuit and the circuit board.

According to another exemplary embodiment of the present invention, the flexible electrical connector is a flexible flat cable or a flexible printed circuit board.

According to another exemplary embodiment of the present invention, the signal processing circuit includes a plurality of circuit boards spaced apart in an axial direction of the housing and electrically connected to each other; the plurality of circuit boards at least includes: a first circuit board electrically connected to the first connection terminal; and a second circuit board electrically connected with one end of the flexible electrical connector.

In the foregoing various exemplary embodiments according to this invention, the circuit board in the pressure sensor electrical connector is electrically connected to the metal shell, thereby improving the grounding performance of the pressure sensor.

Furthermore, in some exemplary embodiments of the present invention, the pressure connector of the pressure sensor may protect the pressure diaphragm from foreign matter such as metal debris in the external medium being sensed, and may protect the pressure diaphragm from momentary high pressures.

Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, which provide a thorough understanding of the present invention.

Drawings

FIG. 1 shows a schematic perspective view of a pressure sensor according to an exemplary embodiment of the invention;

FIG. 2 shows an exploded schematic view of a pressure sensor according to an exemplary embodiment of the invention;

FIG. 3 shows an axial cross-section of a pressure sensor according to an exemplary embodiment of the invention;

FIG. 4 shows an axial cross-section of a pressure sensing device of a pressure sensor, according to an exemplary embodiment of the present invention;

FIG. 5 shows an axial cross-section of a pressure sensor electrical connector according to an exemplary embodiment of the invention;

FIG. 6 shows an exploded schematic view of a pressure sensor electrical connector according to an exemplary embodiment of the invention;

FIG. 7 shows a schematic perspective view of a circuit board of a pressure sensor electrical connector according to an exemplary embodiment of the invention;

FIG. 8 shows a schematic perspective view of a pressure joint of a pressure sensor according to an exemplary embodiment of the invention;

fig. 9 shows an axial cross-section of a pressure joint of a pressure sensor according to an exemplary embodiment of the invention.

Detailed Description

The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the invention.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.

According to one general technical concept of the present invention, there is provided a pressure sensor electrical connector, comprising: a metal shell; a circuit board mounted in the metal case; and a plurality of terminals disposed in the metal case and electrically connected with the circuit board. A raised electrical contact is provided on the circuit board, the electrical contact being in electrical contact with the metal shell such that the circuit board is electrically connected to the metal shell via the electrical contact.

According to another general technical concept of the present invention, there is provided a pressure sensor including: pressure detection device and pressure sensor electric connector. The pressure detection device includes: a housing having first and second ports opposite in an axial direction thereof; and a pressure detection module provided in the housing for detecting a pressure of an external medium. One end of the metal shell is in butt joint with the first port of the shell, and the circuit board is electrically connected with the pressure detection module.

FIG. 1 shows a schematic perspective view of a pressure sensor according to an exemplary embodiment of the invention; FIG. 2 shows an exploded schematic view of a pressure sensor according to an exemplary embodiment of the invention; fig. 3 shows an axial cross-section of a pressure sensor according to an exemplary embodiment of the invention.

As shown in fig. 1 to 3, in the illustrated embodiment, the pressure sensor mainly comprises a pressure detection device 3, a pressure sensor electrical connector 1 and a pressure connector 2. The pressure sensor electrical connector 1 is used for electrically connecting the pressure detection device 3 to a control system for transmitting detected pressure signals to the control system. The pressure joint 2 is used to connect the pressure detecting device 3 to the detected equipment to transmit the pressure medium (or referred to as external medium) in the detected equipment to the pressure detecting device 3.

Fig. 4 shows an axial cross-section of a pressure detection device 3 of a pressure sensor according to an exemplary embodiment of the invention; fig. 5 shows an axial cross-section of the pressure sensor electrical connector 1 according to an exemplary embodiment of the invention; fig. 6 shows an exploded schematic view of the electrical pressure sensor connector 1 according to an exemplary embodiment of the invention; fig. 7 shows a schematic perspective view of the circuit board 12 of the electrical connector 1 of the pressure sensor according to an exemplary embodiment of the invention.

As shown in fig. 1 to 7, in an exemplary embodiment of the present invention, a pressure sensor electrical connector 1 is disclosed. The pressure sensor electrical connector 1 comprises: a metal shell 11, a circuit board 12 and a plurality of terminals 131, 132, 133. The circuit board 12 is mounted in the metal case 11. A plurality of terminals 131, 132, 133 are provided in the metal case 11 and electrically connected with the circuit board 12. A raised electrical contact 122 is provided on the circuit board 12, the electrical contact 122 being in electrical contact with the metal shell 11, such that the circuit board 12 is electrically connected to the metal shell 11 via the electrical contact 122. In this way, the grounding performance of the circuit board 12 can be improved.

As shown in fig. 1 to 7, in the illustrated embodiment, the electrical contact 122 includes a plurality of arc-shaped contact portions 122 'spaced apart in the circumferential direction, the plurality of arc-shaped contact portions 122' being in electrical contact with the metal shell 11.

As shown in fig. 1-7, in the illustrated embodiment, a conductive trace (not shown) is formed on the circuit board 12 that electrically interconnects the plurality of arcuate contacts 122' to one another. In this way, the grounding performance of the circuit board 12 can be further improved.

As shown in fig. 1-7, in the illustrated embodiment, the circuit board 12 is circular in shape and a plurality of arcuate contacts 122' are formed on the top surface of the circuit board 12 and are evenly spaced around the periphery of the circuit board 12.

As shown in fig. 1 to 7, in the illustrated embodiment, an annular positioning step 111a is formed on the inner side of the metal shell 11, and a plurality of arc-shaped contact portions 122' are abutted against the annular positioning step 111a to be in electrical contact with the metal shell 11.

As shown in fig. 1-7, in the illustrated embodiment, the plurality of terminals 131, 132, 133 includes a ground terminal 131. The ground terminal 131 is electrically connected with the metal shell 11 so that the circuit board 12 is electrically connected to the metal shell 11 via the ground terminal 131. In this way, the grounding performance of the circuit board 12 can be further improved.

As shown in fig. 1 to 7, in the illustrated embodiment, the other terminals 132, 133 among the plurality of terminals 131, 132, 133 except for the ground terminal 131 are electrically isolated from the metal shell 11. In the illustrated embodiment, the other terminals 132, 133 include a power terminal 132 and a pair of signal terminals 133.

As shown in fig. 1 to 7, in the illustrated embodiment, a conductive trace (not shown) that electrically interconnects the ground terminal 131 and the electrical contact 122 to each other is formed on the circuit board 12. In this way, the grounding performance of the circuit board 12 can be further improved.

As shown in fig. 1 to 7, in the illustrated embodiment, the metal shell 11 includes a peripheral wall 111 that encloses an inner cavity and a partition wall 112 that partitions the inner cavity into the first cavity 101 and the second cavity 102. The circuit board 12 is mounted in the first cavity 101, and a plurality of terminals 131, 132, 133 pass through the partition wall 112. The ground terminal 131 is welded or riveted to the partition wall 112 of the metal shell 11, and the other terminals 132, 133 are electrically isolated from the partition wall 112.

As shown in fig. 1 to 7, in the illustrated embodiment, the pressure sensor electrical connector 1 further comprises a first insulating member 15. The first insulating member 15 is provided in the first cavity 101 of the metal shell 11 for fixing the plurality of terminals 131, 132, 133 and electrically isolating the other terminals 132, 133 from the partition wall 112. In the illustrated embodiment, a portion of the first insulator 15 is inserted into the gap between the other terminals 132, 133 and the partition wall 112 such that the other terminals 132, 133 are electrically isolated from the partition wall 112. In an exemplary embodiment of the present invention, the first insulating member 15 may be formed of epoxy resin poured in the first cavity 101 of the metal shell 11.

As shown in fig. 1 to 7, in the illustrated embodiment, the pressure sensor electrical connector 1 further comprises a second insulating member 14. The second insulating member 14 is mounted in the second cavity 102 of the metal shell 11, and a plurality of terminals 131, 132, 133 are fixed to the second insulating member 14.

As shown in fig. 1-7, in the illustrated embodiment, the second insulator 14 is a unitary injection molded piece formed by an insert injection molding process. In injection molding the second insulating member 14, the plurality of terminals 131, 132, 133 are inserts, and the second insulating member 14 is an injection molded member such that the second insulating member 14 is directly engaged with the plurality of terminals 131, 132, 133.

As shown in fig. 1 to 7, in the illustrated embodiment, one end of the metal shell 11 is used to interface with the outer shell 31 of the pressure detecting device 3 of the pressure sensor, and the other end 113 of the metal shell 11 is used to interface with the housing of an electrical connection base (not shown); a screw 113a for screw-coupling with the housing of the electrical connection holder is formed on the other end 113 of the metal shell 11.

As shown in fig. 1 to 7, in the illustrated embodiment, a plurality of terminal insertion holes 121 are formed on the circuit board 12, and a plurality of terminals 131, 132, 133 are respectively inserted and soldered into the plurality of terminal insertion holes 121 to be electrically connected with the circuit board 12.

In another exemplary embodiment of the present invention, as shown in fig. 1-7, a pressure sensor is also disclosed. The pressure sensor includes: a pressure detection device 3 and the aforementioned pressure sensor electrical connector 1. The pressure detection device 3 includes: a housing 31 and a pressure detection module. The housing 31 has a first port 311 and a second port 312 opposite in the axial direction thereof. The housing 31 is made of metal. A pressure detection module is provided in the housing 31 for detecting the pressure of the external medium. One end of the metal shell 11 is abutted with the first port 311 of the housing 31, and the circuit board 12 is electrically connected with the pressure detection module.

As shown in fig. 1 to 7, in the illustrated embodiment, the pressure detection module includes: a module body 32 formed with a housing chamber 32a for housing an internal medium; a pressure diaphragm 321 mounted on one opening (bottom opening in the drawing) of the accommodation chamber 32a of the module body 32 for transmitting the pressure of the external medium to the internal medium; a pressure detection chip (not shown, which is a micro-electromechanical device) mounted in the module body 32 for detecting the pressure of the internal medium; and a sealing cover 35 mounted on the other opening (top opening in the drawing) of the accommodation chamber of the module body 32 to seal the other opening. In the illustrated embodiment, the pressure detection module further includes a weld ring 322. The weld ring 322 welds the peripheral portion of the pressure diaphragm 321 to the module body 32.

Fig. 8 shows a schematic perspective view of a pressure joint 2 of a pressure sensor according to an exemplary embodiment of the invention; fig. 9 shows an axial cross-section of a pressure joint 2 of a pressure sensor according to an exemplary embodiment of the invention.

As shown in fig. 1 to 9, in the illustrated embodiment the pressure sensor further comprises a pressure fitting 2. The pressure joint 2 includes: a peripheral wall 21 enclosing a cavity 201; a bottom wall 22 connected to the bottom of the peripheral wall 21; and a connecting portion 23 connected to the bottom wall 22 and formed with a passage 203. A communication hole 202 that communicates the cavity 201 and the channel 203 is formed on the bottom wall 22 so that an external medium can flow from the channel 203 into the cavity 201 via the communication hole 202.

As shown in fig. 1 to 9, in the illustrated embodiment, the pressure joint 2 is connected to the pressure detecting device 3, and a pressure diaphragm 321 is located in the cavity 201 for transmitting the pressure of the external medium in the cavity 201 to the internal medium.

As shown in fig. 1 to 9, in the illustrated embodiment, the peripheral wall 21 of the pressure joint 2 is inserted into the second port 312 of the housing 31 of the pressure detection device 3 and interfaces with the second port 312. One end of the module body 32 is inserted into the cavity 201 of the pressure fitting 2 and interfaces with the pressure fitting 2.

As shown in fig. 1-9, in the illustrated embodiment, the channel 203 includes: a central bore 203a and an annular groove 203b. An annular groove 203b is formed at one end of the central hole 203 a. The center hole 203a communicates with the communication hole 202 via an annular groove 203b, and the annular groove 203b has an inner diameter larger than the center hole 203a, so that the passage 203 has a T-shaped axial cross section. Therefore, the external medium flows into the cavity 201 along the T-shaped curved path, so that the pressure impact of the external medium on the pressure diaphragm 321 can be reduced, and the pressure diaphragm 321 can be prevented from being damaged due to the pressure impact.

As shown in fig. 1 to 9, in the illustrated embodiment, the communication hole 202 is adjacent to the peripheral wall 21 of the pressure joint 2, so that the pressure shock of the external medium to the pressure diaphragm 321 can be further reduced.

As shown in fig. 1 to 9, in the illustrated embodiment, the size of the through-hole 202a between the communication hole 202 and the annular groove 203b is smaller than the diameter of the communication hole 202. In the illustrated embodiment, the size of the through-hole 202a is smaller than a predetermined value to prevent impurities such as metal chips in the external medium from entering the cavity 201. In this way, the pressure diaphragm 321 can be prevented from being damaged by impurities such as metal chips in the external medium.

As shown in fig. 1 to 9, in the illustrated embodiment, a plurality of communication holes 202 are formed in the bottom wall 22, the plurality of communication holes 202 being circumferentially spaced apart and communicating with the annular groove 203b.

As shown in fig. 1 to 9, in the illustrated embodiment, a screw portion 23a for screw-coupling with the device under test is formed on the coupling portion 23, and the pressure joint 2 further includes a flange portion 24 coupled to the outside of the peripheral wall 21, the flange portion 24 being adapted to abut against a mounting panel (not shown) of the device under test (not shown). A seal ring mounting groove 204 for mounting a seal ring (not shown) is formed on the bottom surface of the flange portion 24, and the seal ring is adapted to be pressed between the flange portion 24 and the mounting panel to achieve sealing therebetween.

As shown in fig. 1 to 9, in the illustrated embodiment, the pressure detection module further includes: a signal processing circuit 33 and first connectors 34, 34a. The signal processing circuit 33 is used for processing the pressure signal detected by the pressure detection chip. The first connectors 34, 34a electrically connect the pressure detection chip to the signal processing circuit 33. The first connectors 34, 34a include: a first insulating body 34 provided between the signal processing circuit 33 and the sealing cover 35; and a plurality of first connection terminals 34a fixed to the first insulating body 34 and penetrating through the sealing cover 35 for electrically connecting the pressure detecting chip and the signal processing circuit 33.

As shown in fig. 1 to 9, in the illustrated embodiment, the pressure detection module further includes: a flexible electrical connector 331 having one end electrically connected to the signal processing circuit 33; and second connectors 30, 30a connected to the other ends of the flexible electrical connectors 331 and electrically connected to the circuit board 12. The second connectors 30, 30a include: a second insulating body 30 fixed to the other end of the flexible electrical connector 331; and a plurality of second connection terminals 30a fixed to the second insulating body 30 for electrically connecting the signal processing circuit 33 and the circuit board 12. In the illustrated embodiment, a plurality of second connection terminals 30a are respectively inserted into a plurality of insertion holes 123 on the circuit board 12.

As shown in fig. 1 to 9, in the illustrated embodiment, the flexible electrical connector 331 may be a flexible flat cable or a flexible printed circuit board.

As shown in fig. 1 to 9, in the illustrated embodiment, the signal processing circuit 33 includes a plurality of circuit boards 33a, 33b that are spaced apart in the axial direction of the housing 31 and are electrically connected to each other. The plurality of circuit boards 33a, 33b include at least: a first circuit board 33b electrically connected to the first connection terminal 34 a; and a second circuit board 33a electrically connected to one end of the flexible electrical connector 331.

It will be appreciated by those skilled in the art that the above-described embodiments are exemplary and that modifications may be made to the embodiments described in various embodiments without structural or conceptual aspects and that these variations may be resorted to without departing from the scope of the invention.

Although the present invention has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the invention and are not to be construed as limiting the invention.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and that the word "a" or "an" does not exclude a plurality. In addition, any element numbers of the claims should not be construed as limiting the scope of the invention.

Claims

1. An electrical connector for a pressure sensor, comprising:

a metal shell (11);

a circuit board (12) mounted in the metal case (11); and

a plurality of terminals (131, 132, 133) provided in the metal case (11) and electrically connected to the circuit board (12),

a raised electrical contact (122) is provided on the circuit board (12), the electrical contact (122) being in electrical contact with the metal shell (11) such that the circuit board (12) is electrically connected to the metal shell (11) via the electrical contact (122).

2. The pressure sensor electrical connector of claim 1, wherein:

the electrical contact portion (122) includes a plurality of arc-shaped contact portions (122 ') spaced apart in the circumferential direction, the plurality of arc-shaped contact portions (122') being in electrical contact with the metal shell (11).

3. The pressure sensor electrical connector of claim 2, wherein:

conductive traces are formed on the circuit board (12) that electrically interconnect the plurality of arcuate contacts (122') to one another.

4. The pressure sensor electrical connector of claim 2, wherein:

the circuit board (12) is circular, and the plurality of arc-shaped contact portions (122') are formed on the top surface of the circuit board (12) and are uniformly spaced around the periphery of the circuit board (12).

5. The pressure sensor electrical connector of claim 2, wherein:

an annular positioning step (111 a) is formed on the inner side of the metal shell (11), and the plurality of arc-shaped contact portions (122') are abutted against the annular positioning step (111 a) to be in electrical contact with the metal shell (11).

6. The pressure sensor electrical connector of any one of claims 1-5, wherein:

the plurality of terminals (131, 132, 133) includes a ground terminal (131), the ground terminal (131) being electrically connected with the metal shell (11) such that the circuit board (12) is electrically connected to the metal shell (11) via the ground terminal (131); and is also provided with

The other terminals (132, 133) of the plurality of terminals (131, 132, 133) except the ground terminal (131) are electrically isolated from the metal shell (11).

7. The pressure sensor electrical connector of claim 6, wherein:

conductive traces electrically interconnecting the ground terminal (131) and the electrical contact (122) to each other are formed on the circuit board (12).

8. The pressure sensor electrical connector of claim 6, wherein:

the metal shell (11) comprises a peripheral wall (111) enclosing an inner cavity and a partition wall (112) dividing the inner cavity into a first cavity (101) and a second cavity (102);

-the circuit board (12) is mounted in the first cavity (101), the plurality of terminals (131, 132, 133) passing through the partition wall (112);

the ground terminal (131) is welded or riveted to a partition wall (112) of the metal shell (11), and the other terminals (132, 133) are electrically isolated from the partition wall (112).

9. The pressure sensor electrical connector of claim 8, further comprising:

a first insulating member (15) provided in the first cavity (101) of the metal shell (11) for fixing the plurality of terminals (131, 132, 133) and electrically isolating the other terminals (132, 133) from the partition wall (112).

10. The pressure sensor electrical connector of claim 8, further comprising:

a second insulating member (14) mounted in a second cavity (102) of the metal shell (11),

the plurality of terminals (131, 132, 133) are fixed to the second insulating member (14).

11. The pressure sensor electrical connector of claim 10, wherein:

the second insulating piece (14) is an integral injection molding piece formed through an insert injection molding process;

the plurality of terminals (131, 132, 133) are inserts when the second insulating member (14) is injection molded, and the second insulating member (14) is an injection molded member such that the second insulating member (14) is directly engaged with the plurality of terminals (131, 132, 133).

12. The pressure sensor electrical connector of claim 1, wherein:

one end of the metal shell (11) is used for being in butt joint with a shell (31) of a pressure detection device (3) of the pressure sensor, and the other end (113) of the metal shell (11) is used for being in butt joint with a shell of the electric connection seat;

a screw thread (113 a) for screw-connecting with the housing of the electrical connection base is formed on the other end (113) of the metal shell (11).

13. The pressure sensor electrical connector of claim 1, wherein:

a plurality of terminal insertion holes (121) are formed on the circuit board (12), and the plurality of terminals (131, 132, 133) are inserted and soldered into the plurality of terminal insertion holes (121), respectively, to be electrically connected with the circuit board (12).

14. A pressure sensor, comprising:

pressure detection device (3), comprising:

a housing (31) having a first port (311) and a second port (312) opposed in an axial direction thereof; and

a pressure detection module provided in the housing (31) for detecting a pressure of an external medium; and

the pressure sensor electrical connection head (1) according to any one of claims 1 to 13,

one end of the metal shell (11) is in butt joint with a first port (311) of the shell (31), and the circuit board (12) is electrically connected with the pressure detection module.

15. The pressure sensor of claim 14, wherein:

the pressure detection module includes:

a module body (32) formed with a housing chamber (32 a) for housing an internal medium;

a pressure diaphragm (321) mounted on one opening of the accommodation chamber (32 a) of the module body (32) for transmitting the pressure of the external medium to the internal medium;

a pressure detection chip mounted in the module body (32) for detecting a pressure of the internal medium; and

and a sealing cover (35) mounted on the other opening of the accommodation chamber (32 a) of the module body (32) to seal the other opening.

16. The pressure sensor of claim 15, further comprising:

the pressure joint (2) comprises:

a peripheral wall (21) surrounding a cavity (201);

a bottom wall (22) connected to the bottom of the peripheral wall (21); and

a connecting portion (23) connected to the bottom wall (22) and formed with a passage (203), a communication hole (202) communicating the cavity (201) and the passage (203) being formed on the bottom wall (22) so that an external medium can flow from the passage (203) into the cavity (201) via the communication hole (202);

the pressure connector (2) is connected to the pressure detection device (3), and the pressure diaphragm (321) is located in the cavity (201) and is used for transmitting the pressure of the external medium in the cavity (201) to the internal medium.

17. The pressure sensor of claim 16, wherein:

the peripheral wall (21) of the pressure joint (2) is inserted into a second port (312) of the housing (31) of the pressure detection device (3) and is in abutment with the second port (312);

one end of the module body (32) is inserted into a cavity (201) of the pressure joint (2) and is in butt joint with the pressure joint (2).

18. The pressure sensor of claim 16, wherein:

the channel (203) comprises:

a central hole (203 a); and

an annular groove (203 b) formed at one end of the center hole (203 a),

the central hole (203 a) communicates with the communication hole (202) via the annular groove (203 b), and the annular groove (203 b) has an inner diameter larger than that of the central hole (203 a) so that the axial cross section of the passage (203) is T-shaped.

19. The pressure sensor of claim 18, wherein:

the communication hole (202) is adjacent to a peripheral wall (21) of the cavity (201), and a size of a through-hole (202 a) between the communication hole (202) and the annular groove (203 b) is smaller than a diameter of the communication hole (202);

the size of the through-hole (202 a) is set to a predetermined value to block impurities in an external medium from entering the cavity (201).

20. The pressure sensor of claim 18, wherein:

a plurality of communication holes (202) are formed in the bottom wall (22), and the plurality of communication holes (202) are circumferentially spaced apart and communicate with the annular groove (203 b).

21. The pressure sensor of claim 16, wherein:

a screw portion (23 a) for screw connection with the device to be detected is formed on the connection portion (23), the pressure joint (2) further includes a flange portion (24) connected to the outside of the peripheral wall (21), the flange portion (24) being adapted to abut against a mounting panel of the device to be detected;

a seal ring mounting groove (204) for mounting a seal ring is formed on the bottom surface of the flange portion (24), the seal ring being adapted to be pressed between the flange portion (24) and the mounting panel to achieve sealing therebetween.

22. The pressure sensor of claim 15, wherein:

the pressure detection module further includes:

a signal processing circuit (33) for processing the pressure signal detected by the pressure detection chip; and

a first connector (34, 34 a) electrically connecting the pressure detection chip to the signal processing circuit (33),

the first connector (34, 34 a) includes:

a first insulating body (34) provided between the signal processing circuit (33) and the sealing cover (35); and

a plurality of first connection terminals (34 a) fixed to the first insulating body (34) and penetrating the sealing cover (35) for electrically connecting the pressure detecting chip and the signal processing circuit (33).

23. The pressure sensor of claim 22, wherein:

the pressure detection module further includes:

a flexible electrical connector (331) having one end electrically connected to the signal processing circuit (33); and

a second connector (30, 30 a) connected to the other end of the flexible electrical connector (331) and electrically connected to the circuit board (12),

the second connector (30, 30 a) includes:

a second insulating body (30) fixed to the other end of the flexible electrical connector (331); and

a plurality of second connection terminals (30 a) fixed to the second insulating body (30) for electrically connecting the signal processing circuit (33) and the circuit board (12).

24. The pressure sensor of claim 23, wherein:

the flexible electric connector (331) is a flexible flat cable or a flexible printed circuit board.

25. The pressure sensor of claim 23, wherein:

the signal processing circuit (33) includes a plurality of circuit boards (33 a, 33 b) which are spaced apart in an axial direction of the housing (31) and are electrically connected to each other;

the plurality of circuit boards (33 a, 33 b) includes at least:

a first circuit board (33 b) electrically connected to the first connection terminal (34 a); and

and a second circuit board (33 a) electrically connected to one end of the flexible electrical connector (331).