Pressure sensing probe and installation method

Abstract

The invention discloses a pressure sensing probe and an installation method, the pressure sensing probe is arranged at the end part of a cable, and the pressure sensing probe comprises a shell, a conduction assembly and a pressure sensing element; the shell is provided with an accommodating cavity; the conducting assembly is arranged in the containing cavity, the conducting assembly comprises a conducting element and a positioning piece, the positioning piece is provided with positioning holes formed in the axial direction, the multiple positioning holes are distributed in the circumferential direction, the conducting element penetrates through the positioning holes, and the conducting element is connected with the conducting element. The conducting element is arranged in the containing cavity, the two opposite ends of the conducting element protrude out of the locating piece respectively, one end of the conducting element is enclosed at the input end of the locating piece to form a limiting part, the other end of the conducting element is connected and conducted with the cable, and the locating piece is bonded in the containing cavity. The limiting part is used for limiting the position of the conducting element in the accommodating cavity; and the pressure sensing element is adhered to the input end of the positioning piece and is clamped to the limiting part, and the pressure sensing element is conducted with the conduction element.

Description

Technical Field

[0001] This application relates to the technical field of sensors, and more particularly, to a pressure sensing probe and an installation method thereof. Background Art

[0002] In a laboratory wind tunnel test system, it is necessary to monitor the pressure of gas in the atmosphere in real time. The reliability and response time of the pressure sensing element are required to be relatively high, and the reserved interface for product installation is generally as small as possible to reduce the influence of the size of the sensor itself on the position of the collected signal.

[0003] However, at present, the improvement of the reliability and response time of sensors often needs to be achieved through complex multi-layer structure designs or complex material improvement steps, but these design methods may bring about an expansion of the package size. For example, although the micron-level material improvement steps can achieve high reliability in a small size, they may require more control circuits and signal processing units, thus requiring reserved welding points to achieve the conduction of the components inside the sensor by welding, resulting in difficulty in further reducing the package size.

[0004] Therefore, how to reduce the size of the sensor while ensuring the reliability of the sensor is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0005] One objective of this application is to provide a new technical solution for a pressure sensing probe.

[0006] According to the first aspect of this application, a pressure sensing probe is provided. The pressure sensing probe is disposed at the end of a cable. The pressure sensing probe includes a housing, a conduction assembly, and a pressure sensing element; the housing has a receiving cavity; the conduction assembly is disposed in the receiving cavity. Among them, the conduction assembly includes a conduction element and a positioning member. The positioning member has positioning holes axially opened, and a plurality of the positioning holes are arranged circumferentially. The conduction element passes through the positioning holes, and two opposite ends of the conduction element respectively protrude from the positioning member. One end of the conduction element forms a limiting portion around the input end of the positioning member. The other end of the conduction element is connected to and conducts with the cable. The positioning member is bonded in the receiving cavity for limiting the position of the conduction element in the receiving cavity; the pressure sensing element is bonded to the input end of the positioning member and is clamped in the limiting portion, and the pressure sensing element conducts with the conduction element.

[0007] Optionally, the positioning member is made of a hard insulating material, and the positioning member and the positioning holes are integrally formed.

[0008] Optionally, the shell has a limiting cavity, which is arranged at one end of the shell away from the pressure-sensitive element, and the limiting cavity is connected to the accommodating cavity. A limiting member is arranged in the limiting cavity, and the limiting member is used to limit the position of the positioning member in the accommodating cavity.

[0009] Optionally, the limiting member is a glue block formed by injecting glue into the limiting cavity and solidifying to match the limiting cavity.

[0010] Optionally, the accommodating cavity and the limiting cavity are arranged in sequence along the axial direction of the shell, and the radial dimension of the limiting cavity is larger than the radial dimension of the accommodating cavity.

[0011] Optionally, a protective cavity is provided on the end of the shell facing away from the limiting cavity, and the input ends of the pressure-sensitive element and the conductive element are both located in the protective cavity; wherein, the protective cavity has an open end on the side facing away from the positioning member, and the pressure-sensitive element senses the medium pressure through the open end.

[0012] Optionally, a cover plate is provided at the open end, and the cover plate and the protective cavity enclose a protective space; wherein, a plurality of through holes are opened on the cover plate, the through holes are connected to the protective space, and the through holes correspond to the pressure-sensitive elements.

[0013] According to a second aspect of the present application, a method for installing a pressure-sensitive probe is provided, which is used to assemble the pressure-sensitive probe as described above, and the method for installing the pressure-sensitive probe includes the following steps: S1: passing the conductive element through the positioning hole, and one end of a plurality of the conductive elements is enclosed at the input end of the positioning member to form a limiting portion adapted for the pressure-sensitive element; S2: attaching the pressure-sensitive element to the input end of the positioning member, and clamping the pressure-sensitive element to the limiting portion, so that the pressure-sensitive element is conductively connected to the conductive element; S3: connecting and conducting the core of the cable to the end of the conductive element facing away from the limiting portion, so that the pressure-sensitive element is conductively connected to the cable through the conductive element; S4: inserting and bonding the positioning member into the accommodating cavity to fix the position of the positioning member in the shell.

[0014] Optionally, the installation method of the pressure sensing probe also includes step S5, which is performed after S4 is completed, wherein S5: sets a limiting cavity on the side of the shell away from the pressure sensing element, injects glue into the limiting cavity, and the glue solidifies to form a glue block that is compatible with the limiting cavity, which is used to limit the position of the positioning part in the axial direction of the shell.

[0015] Optionally, in S1, the conducting element and the positioning hole are fixedly bonded with glue; in S2, the pressure-sensitive element and the input end of the positioning member are fixedly bonded with glue; in S4, the positioning member and the inner wall of the housing are fixedly connected with glue.

[0016] In the embodiment of the present application, positioning holes are formed in the positioning member along the axial direction, and a plurality of positioning holes are arranged along the circumferential direction. The conducting elements penetrate through the positioning holes to connect with the positioning member. Both opposite ends of the plurality of conducting elements extend out of the positioning holes. One end of the conducting element extends out of the input end of the positioning member and forms a limiting portion centered on the axis at the input end of the positioning member. The pressure-sensitive element is adhesively fixed to the input end of the positioning member and is embedded in the limiting portion. The pressure-sensitive element is clamped and fixed by a plurality of conducting elements, which not only limits the position of the pressure-sensitive element but also realizes the connection and conduction between the conducting element and the pressure-sensitive element. The other end of the conducting element extends out of the output end of the positioning member, is connected and conducts with the cable, so that the pressure-sensitive element and the cable are conducted through the conducting element. The pressure-sensitive element with the connected and fixed conducting component is installed in the housing, and the positioning member is fixed in the accommodating cavity by an adhesive bonding method to prevent the conducting component and the pressure-sensitive element from shaking in the accommodating cavity and affecting the detection effect, effectively improving the reliability and detection accuracy of the pressure-sensitive probe.

[0017] According to the above content, a plurality of conducting elements are connected to the positioning member and form a limiting portion to limit the relative positions of the conducting element and the pressure-sensitive element through the positioning member, effectively enhancing the connection stability between the conducting element and the pressure-sensitive element. Moreover, compared with the prior art in which the components inside the sensor are conducted by welding, in the present application, the pressure-sensitive element, the positioning member, and the housing are connected and fixed by an adhesive bonding method, which can not only enhance the stability of the conducting component and the pressure-sensitive element in the accommodating cavity but also effectively reduce the welding points, so as to facilitate reducing the size of the pressure-sensitive probe and lowering the packaging difficulty.

[0018] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.

[0020] Figure 1 is a schematic structural diagram of the connection between the pressure-sensitive probe and the cable in the embodiment of the present application;

[0021] Figure 2 is a schematic cross-sectional view of the connection between the pressure-sensitive probe and the cable in the embodiment of the present application;

[0022] Figure 3It is a schematic structural diagram of step S1 in the embodiment of the present application;

[0023] Figure 4 It is a schematic structural diagram of step S2 in the embodiment of the present application;

[0024] Figure 5 It is a schematic structural diagram of step S3 in the embodiment of the present application;

[0025] Figure 6 It is a schematic structural diagram of step S4 in the embodiment of the present application;

[0026] Figure 7 It is a schematic structural diagram of step S5 in the embodiment of the present application;

[0027] Figure 8 It is a schematic structural diagram of the connection between the pressure-sensitive probe and the cover plate in the embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1 - housing; 11 - accommodating cavity; 12 - limiting cavity; 13 - limiting member; 14 - protection cavity; 15 - cover plate; 151 - through hole; 16 - external thread;

[0030] 2 - conduction assembly; 21 - conduction element; 22 - positioning member; 221 - positioning hole; 23 - limiting portion;

[0031] 3 - pressure-sensitive element;

[0032] 4 - cable. Detailed implementation manners

[0033] Now, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0034] The following description of at least one exemplary embodiment is actually merely illustrative and in no way restricts the present application or its application or use.

[0035] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0036] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0037] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it will not be further discussed in subsequent figures.

[0038] According to an embodiment of the present application, a pressure sensing probe is provided. The pressure sensing probe is disposed at the end of a cable 4. The pressure sensing probe includes a housing 1, a conduction component 2, and a pressure sensing element 3. The housing 1 has a receiving cavity 11; the conduction component 2 is disposed in the receiving cavity 11. Wherein, the conduction component 2 includes a conduction element 21 and a positioning member 22. The positioning member 22 has positioning holes 221 axially formed therein. A plurality of the positioning holes 221 are arranged circumferentially. The conduction element 21 passes through the positioning holes 221, and two opposite ends of the conduction element 21 respectively protrude from the positioning member 22. One end of the conduction element 21 forms a limiting portion 23 around the input end of the positioning member 22. The other end of the conduction element 21 is connected to and conducts with the cable 4. The positioning member 22 is bonded in the receiving cavity 11 for limiting the position of the conduction element 21 in the receiving cavity 11; the pressure sensing element 3 is bonded to the input end of the positioning member 22 and is clamped in the limiting portion 23. The pressure sensing element 3 conducts with the conduction element 21.

[0039] As Figures 1 to 8 shown, the pressure sensing probe is disposed at the end of the cable 4 for sensing the pressure of media such as gas and liquid.

[0040] The positioning member 22 is a columnar insulating preform. The positioning holes 221 are axially formed in the positioning member 22. The conduction element 21 passes through the positioning holes 221, so that the conduction element 21 is connected to the positioning member 22. The position of the conduction element 21 in the radial direction is limited by the positioning holes 221, preventing the conduction element 21 from shaking in the radial direction and affecting the connection stability between the conduction element 21 and the pressure sensing element 3.

[0041] A plurality of positioning holes 221 are circumferentially formed in the positioning member 22. The conduction element 21 is inserted into each positioning hole 221, and two opposite ends of the conduction element 21 respectively extend out of the positioning holes 221. The conduction is achieved by connecting the end portions of the conduction element 21 extending out of the positioning member 22 to the pressure sensing element 3 and the core of the cable 4 respectively. The position of the conduction element 21 on the positioning member 22 is limited by the positioning holes 221. The outer diameter of the positioning member 22 is adapted to the inner diameter of the receiving cavity 11. By applying glue on the outer wall of the positioning member 22, the positioning member 22 is bonded in the receiving cavity 11, effectively improving the connection strength between the positioning member 22 and the inner wall of the housing. By fixedly connecting the positioning member 22 and the housing 1, the stability of the conduction component 2 in the housing 1 is effectively enhanced, and further the connection stability between the pressure sensing element 3 and the cable 4 through the conduction element 21 is improved.

[0042] The positioning member 22 has an input end and an output end which are oppositely arranged, and both ends of the conduction element 21 extend out of the input end and the output end respectively. One ends of a plurality of conduction elements 21 form a limiting portion 23 centered on the axis of the positioning member 22 at the input end, and the radial dimension of the limiting portion 23 is adapted to the radial dimension of the pressure-sensitive element 3. The pressure-sensitive element 3 can be adhesively bonded to the input end through glue and embedded in the limiting portion 23. By adhesively fixing the pressure-sensitive element 3 to the positioning member 22, the position of the pressure-sensitive element 3 in the axial direction can be defined through the positioning member 22, so as to improve the stability of the pressure-sensitive element 3 in the accommodation cavity 11, and avoid the shaking of the pressure-sensitive element 3 during the use of the pressure-sensitive probe, which affects the connection stability between the pressure-sensitive element 3 and the conduction element 21. By embedding the pressure-sensitive element 3 in the limiting portion 23 formed by a plurality of conduction elements 21, not only the position of the pressure-sensitive element 3 in the radial direction can be defined, but also the connection strength between the conduction element 21 and the pressure-sensitive element 3 can be effectively improved, and the reliability of the pressure-sensitive probe can be improved.

[0043] Certainly, in the embodiment of the present application, the positioning member 22 and the housing 1 are not limited to the above structures, and those skilled in the art can set them according to actual needs. For example, the conduction assembly 2 is fixed in the accommodation cavity 11 by means of a threaded connection between the positioning member 22 and the inner wall of the housing 1.

[0044] The conduction element 21 is a columnar metal conduction member. For example, the conduction element 21 is a pin, and the pin is made of a conductive material and gold-plated.

[0045] In the embodiment of the present application, the pressure-sensitive element 3 and the conduction element 21 are conducted by bonding wires. Bonding wires are also called DuPont wires, bonding wires or bonding wires, which are special wires mainly used for internal connection of semiconductor devices, especially in the chip packaging process. Bonding wires usually use gold wires, copper wires or foil wires and can be connected to pins. Due to its very good reliability, the welding process can be omitted, which can not only reduce the volume of the pressure-sensitive probe, but also quickly realize the connection between the pressure-sensitive element 3 and the conduction element 21, effectively reduce the assembly difficulty, and improve the production efficiency.

[0046] Certainly, in the embodiment of the present application, the connection manner between the pressure-sensitive element 3 and the conduction element 21 is not limited to the above, and those skilled in the art can set it according to actual needs.

[0047] The outer wall of the housing 1 has an external thread 16 at a position corresponding to the positioning member 22. By providing the external thread 16 on the outer wall of the housing 1, it is convenient to connect the pressure-sensitive probe to an external device, and the threaded connection is convenient for installation and disassembly, effectively reducing the assembly difficulty of the pressure-sensitive probe for use.

[0048] In the embodiment of the present application, a positioning hole 221 is formed in the positioning member 22 along the axial direction, and a plurality of positioning holes 221 are arranged in the circumferential direction. The conduction element 21 passes through the positioning hole 221 to connect with the positioning member 22. Both opposite ends of the plurality of conduction elements 21 extend out of the positioning hole 221. One end of the conduction element 21 extends out of the input end of the positioning member 22, and a limiting portion 23 centered on the axis is formed at the input end of the positioning member 22. The pressure sensing element 3 is adhesively fixed to the input end of the positioning member 22 and is embedded in the limiting portion 23. The pressure sensing element 3 is clamped and fixed by the plurality of conduction elements 21, which not only limits the position of the pressure sensing element 3 but also realizes the connection and conduction between the conduction element 21 and the pressure sensing element 3. The other end of the conduction element 21 extends out of the output end of the positioning member 22, connects with and conducts with the cable 4, so that the pressure sensing element 3 and the cable 4 are conducted through the conduction element 21. The pressure sensing element 3 and the conduction assembly 2 that are connected and fixed are installed in the housing 1. The positioning member 22 is fixed in the accommodation cavity 11 by bonding, preventing the conduction assembly 2 and the pressure sensing element 3 from shaking in the accommodation cavity 11 and affecting the detection effect, effectively improving the reliability and detection accuracy of the pressure sensing probe.

[0049] According to the above content, a plurality of conduction elements 21 are connected to the positioning member 22 to form a limiting portion 23, so as to limit the relative positions of the conduction element 21 and the pressure sensing element 3 through the positioning member 22, effectively enhancing the connection stability between the conduction element 21 and the pressure sensing element 3. Moreover, compared with the prior art in which the conduction of the components inside the sensor is realized by welding, in the present application, the pressure sensing element 3, the positioning member 22, and the housing 1 are connected and fixed by bonding, which can not only enhance the stability of the conduction assembly 2 and the pressure sensing element 3 in the accommodation cavity 11 but also effectively reduce the welding points, so as to facilitate reducing the size of the pressure sensing probe and lowering the packaging difficulty.

[0050] In one example, the positioning member 22 is made of a hard insulating material, and the positioning member 22 and the positioning hole 221 are integrally formed.

[0051] In the embodiment of the present application, the positioning member 22 is made of a hard insulating material such as silicone glass or polyether ketone. By using the positioning member 22 made of a hard insulating material, not only can the absorption of part of the pressure during the sensing process be reduced to improve the detection accuracy, but also the hard characteristics can facilitate the insertion of the conduction element 21 into the positioning hole 221, so that the positioning member 22 supports the conduction element 21, preventing the conduction element 21 from being damaged due to excessive medium pressure during the use of the pressure sensing probe.

[0052] The positioning hole 221 is an axially extending through-hole formed on the positioning member 22 and mates with the conductive element 21. The positioning member 22 and the positioning hole 221 are integrally formed by injection molding. This not only reduces the number of assembly steps required to create the positioning hole 221 on the positioning member 22, thus simplifying assembly, but also provides support and fixed positioning of the conductive element 21 through the positioning hole 221. Furthermore, it facilitates attachment of the pressure-sensitive element 3 to the positioning member 22, enhancing the stability of the connection between the pressure-sensitive element 3 and the positioning member 22.

[0053] In one example, the shell 1 has a limiting cavity 12, which is arranged at the end of the shell 1 away from the pressure-sensing element 3, and the limiting cavity 12 is connected to the accommodating cavity 11. A limiting member 13 is arranged in the limiting cavity 12, and the limiting member 13 is used to limit the position of the positioning member 22 in the accommodating cavity 11.

[0054] like Figures 1 to 8 As shown, the limiting cavity 12 of the housing 1 is arranged along the axial direction and is located on the side of the accommodating cavity 11 close to the cable 4. After the conductive component 2 is embedded in the accommodating cavity 11, a limiting member 13 is provided in the limiting cavity 12. The limiting member 13 blocks the limiting cavity 12 to limit the axial position of the conductive component 2, preventing the conductive component 2 from sliding in the axial direction, causing the conductive component 2 to separate from the housing 1 and affecting the connection stability between the pressure-sensitive element 3, the conductive component 2, and the cable 4.

[0055] In one example, the limiting member 13 is a glue block formed by injecting glue into the limiting cavity 12 and solidifying to match the limiting cavity 12 .

[0056] In an embodiment of the present application, glue is injected into the limiting cavity 12, and after the glue solidifies, a glue block that is compatible with the limiting cavity 12 is formed. In this way, not only can the limiting cavity 12 be fully filled and the connection strength between the glue block and the limiting cavity 12 be enhanced, but also a limiting fit can be formed through the shape of the glue block and the limiting cavity 12, thereby effectively blocking the position of the conductive component 2 in the axial direction.

[0057] An internal thread is provided on the inner wall of the limiting cavity 12 , and the friction between the limiting member 13 and the inner wall of the limiting cavity 12 is enhanced by providing the internal thread, thereby effectively enhancing the connection strength between the limiting member 13 and the housing 1 in the axial direction.

[0058] The limiting cavity 12 may also be in a T-shaped, cylindrical or conical shape. In the above embodiment, the limiting member 13 is adapted to the limiting cavity 12 .

[0059] Of course, in the embodiment of the present application, the limiting cavity 12 is not limited to the above structure, and those skilled in the art can configure it according to actual needs. For example, the limiting cavity 12 can also be configured as a cylinder or a cone. When the limiting cavity 12 is conical, the diameter of the limiting cavity 12 gradually decreases from the input end to the output end.

[0060] Of course, in the embodiments of the present application, the position limiting member 13 is not limited to the above structure, and those skilled in the art can configure it according to actual needs. For example, the position limiting cavity 12 is cylindrical, and its inner wall has an internal thread. The position limiting member 13 is a stud adapted to the position limiting cavity 12. The stud has an axial through hole with a diameter smaller than the diameter of the positioning member 22 and adapted to the diameter of the cable 4, allowing the cable 4 to pass through and connect to the conductive component 2 to achieve conductivity.

[0061] In one example, the accommodating cavity 11 and the limiting cavity 12 are sequentially arranged along the axial direction of the housing 1 , and a radial dimension of the limiting cavity 12 is greater than a radial dimension of the accommodating cavity 11 .

[0062] like Figures 1 to 8 As shown, the shell 1 has an input end and an output end. When the conductive component 2 is embedded in the accommodating cavity 11, the pressure-sensitive element 3 is located on the side close to the input end of the shell 1, so that the pressure-sensitive element 3 can sense air, liquid and other media, and the conductive element 21 is connected to the cable 4, and the cable 4 extends out of the output end.

[0063] The diameter of the side of the limiting cavity 12 close to the accommodating cavity 11 is larger than the diameter of the side away from the accommodating cavity 11. By setting the minimum diameter of the limiting cavity 12 larger than the diameter of the accommodating cavity 11, the conductive component 2 can be easily embedded in the accommodating cavity 11 through the limiting cavity 12, effectively reducing the difficulty of assembling the pressure sensing probe.

[0064] By providing a limiting member 13 in the limiting cavity 12 , the axial position of the conducting component 2 in the accommodating cavity 11 is limited to prevent the conducting component 2 from moving in the axial direction and sliding out of the housing 1 through the limiting cavity 12 .

[0065] In one example, a protective cavity 14 is provided at one end of the shell 1 facing away from the limiting cavity 12, and the input ends of the pressure-sensing element 3 and the conductive element 21 are both located in the protective cavity 14; wherein, the protective cavity 14 has an open end on the side facing away from the positioning member 22, and the pressure-sensing element 3 senses the medium pressure through the open end.

[0066] like Figures 1 to 8As shown, a protective cavity 14 is provided at the input end of the housing 1 to protect the pressure-sensitive element 3 and the ends of the conductive element 21. The protective cavity 14 forms an open end on the side facing away from the pressure-sensitive element 3. A medium, such as liquid or air, enters the protective cavity 14 through the open end. The pressure-sensitive element 3 within the protective cavity 14 senses the pressure of the medium and transmits the signal to the information processing device via the conductive element 21, thereby achieving pressure detection.

[0067] Of course, in the embodiment of the present application, the protective cavity 14 is not limited to the above structure, and those skilled in the art can set it according to actual needs. For example, a protective shell can also be set at the input end of the housing 1, and the protective shell is a hollow column with openings respectively provided at two opposite ends along the axial direction. One end of the protective shell is detachably connected to the housing 1, and the pressure-sensitive element 3 senses the medium pressure through the opening of the protective shell close to the medium end. By realizing a detachable connection between the protective shell and the housing 1 through threads, snap-fits, interference fits, etc., the simple installation and disassembly can not only realize the protection of the pressure-sensitive element 3 and the conductive element 21, but also facilitate the inspection and replacement of the components in the protective cavity 14, thereby reducing maintenance costs.

[0068] In one example, a cover plate 15 is provided at the open end, and the cover plate 15 and the protective cavity 14 enclose a protective space; wherein, a plurality of through holes 151 are opened on the cover plate 15, and the through holes 151 are connected to the protective space, and the through holes 151 correspond to the pressure-sensitive element 3.

[0069] like Figures 1 to 8 As shown, a cover plate 15 is provided at the open end so that the cover plate 15 and the protective cavity 14 enclose a protective space, thereby further strengthening the protection of the components in the protective cavity 14 and effectively reducing the entry of impurities into the protective cavity 14 .

[0070] A plurality of through holes 151 are evenly distributed on the cover plate 15 . The medium to be measured enters the protective space through the through holes 151 and contacts the pressure-sensitive element 3 in the protective space, and the pressure of the medium is sensed by the pressure-sensitive element 3 .

[0071] In the embodiment of the present application, the cover plate 15 can be connected to the input end of the housing 1 by bonding, snapping, etc.

[0072] According to another embodiment of the present application, a method for installing a pressure-sensitive probe is provided. The method for installing the pressure-sensitive probe is used to assemble the pressure-sensitive probe as described above. The method for installing the pressure-sensitive probe includes the following steps: S1: Pass the conduction element 21 through the positioning hole 221, and one end of a plurality of the conduction elements 21 forms a limiting portion 23 adapted to the pressure-sensitive element 3 around the input end of the positioning member 22; S2: Attach the pressure-sensitive element 3 to the input end of the positioning member 22, and snap the pressure-sensitive element 3 into the limiting portion 23, and the pressure-sensitive element 3 is conducted with the conduction element 21; S3: Connect and conduct the core of the cable 4 to one end of the conduction element 21 facing away from the limiting portion 23, and the pressure-sensitive element 3 is conducted with the cable 4 through the conduction element 21; S4: Insert and bond the positioning member 22 into the accommodating cavity 11 to fix the position of the positioning member 22 in the housing 1.

[0073] As Figures 1 to 8 shown, in the first step, as Figure 3 shown, assemble the conduction assembly 2. Apply glue at the midpoint of the conduction element 21, and insert the conduction element 21 coated with glue into the positioning hole 221 of the positioning member 22.

[0074] In the embodiment of the present application, taking a four-core cable 4 as an example, the positioning member 22 is provided with four positioning holes 221, and the four positioning holes 221 are arranged at equal angles in the circumferential direction. The conduction element 21 is made of a conductive material and is a gold-plated pin. The pins are respectively coated with glue and inserted into the positioning holes 221. Both ends of the pin protrude from the positioning member 22, and one end of the pin forms a limiting portion 23 at the input end of the positioning member 22 to limit the position of the pressure-sensitive element 3 in the radial direction. Of course, the conduction element 21 can also be fixed to the positioning member 22 by interference fit, snap connection or other means.

[0075] In the second step, as Figure 4 shown, connect the pressure-sensitive element 3 to the conduction assembly 2. Apply glue to one side of the pressure-sensitive element 3 to bond the pressure-sensitive element 3 to the input end of the positioning member 22, and the ends of the four conduction elements 21 arranged in the circumferential direction are snap-connected to the pressure-sensitive element 3. This can not only limit the relative positions of the conduction element 21 and the pressure-sensitive element 3 through the positioning member 22 to enhance the connection stability between the two, but also limit the position of the pressure-sensitive element 3 in the radial direction through the conduction element 21 to prevent the pressure-sensitive element 3 from detaching from the conduction assembly 2 and affecting the reliability of the pressure-sensitive probe.

[0076] In the third step, as Figure 5As shown, the pressure - sensing element 3 is connected to the cable 4 through the conduction component 2. One end of the pin is connected to and conducts with the pressure - sensing element 3, and the other end is connected to the core of the cable 4 at the output end of the positioning member 22. The conduction between the pressure - sensing element 3 and the cable 4 is achieved through the conduction element 21. The conduction element 21 and the core of the cable 4 can be connected by soldering or crimping.

[0077] Step 4, as Figure 6 shown, connect the pressure - sensing element 3, the conduction component 2 to the housing 1. Apply glue at the mid - point of the outer wall of the positioning member 22. Connect the pressure - sensing element 3, the conduction component 2 and the cable 4. Insert the pressure - sensing element 3 into the accommodation cavity 11 from the output end of the housing 1. The conduction component 2 and the cable 4 enter the housing 1 in sequence until the positioning member 22 is embedded in the accommodation cavity 11, and it is adhesively fixed to the inner wall of the accommodation cavity 11 through the glue on the outer wall of the positioning member 22, effectively enhancing the connection stability between the positioning member 22 and the housing 1, and preventing the conduction component 2 from shaking in the housing 1 when using the pressure - sensing probe, which affects the reliability of the pressure - sensing probe.

[0078] Of course, in the embodiment of the present application, the connection between the positioning member 22 and the pressure - sensing element 3, the conduction element 21 and the inner wall of the housing 1 is not limited to the above - mentioned connection method, and those skilled in the art can set it according to actual needs. For example, interference fit, snap - fit and other methods can also be used for fixation.

[0079] In an example, the installation method of the pressure - sensing probe further includes step S5, which is carried out after step S4 is completed. Wherein, in step S5: inject glue into the limiting cavity 12 of the housing 1, and the glue solidifies to form a glue block adapted to the limiting cavity 12, which is used to limit the axial position of the positioning member 22 in the housing 1.

[0080] As Figures 1 to 8 shown, after completing step S4, continue with step S5. In step S5, inject glue into the limiting cavity 12 of the housing 1 to limit the position of the positioning member 22 in the housing 1, so as to strengthen the connection strength between the housing 1 and the positioning member 22.

[0081] As Figure 7As shown, the housing 1 has a limiting cavity 12 on the side facing away from the pressure-sensitive element 3. When the pressure-sensitive element 3 is located in the protective cavity 14 and the conductive component 2 is located in the accommodating cavity 11, the connection end of the conductive component 21 and the cable 4 is located in the limiting cavity 12. Glue is injected into the limiting cavity 12, and the glue block formed by the glue solidification forms a limiting fit with the limiting cavity 12 to limit the axial position of the conductive component 2 in the housing 1, preventing the conductive component 2 from sliding and falling off in the axial direction, which would affect the reliability of the pressure-sensitive probe. Moreover, the limiting method of using glue solidification to form a glue block can not only enhance the connection strength between the limiting member 13 and the housing 1, but also reinforce the connection end of the conductive component 21 and the cable 4, preventing the cable 4 from being disconnected from the conductive component 21 due to dragging when using the pressure-sensitive probe.

[0082] like Figure 8 As shown, the cover plate 15 and the housing 1 can be connected by welding, bonding, clamping, etc.

[0083] In one example, in S1, the conductive element 21 is fixed to the positioning hole 221 by adhesive bonding, in S2, the pressure-sensitive element 3 is fixed to the input end of the positioning member 22 by adhesive bonding, and in S4, the positioning member 22 is fixed to the inner wall of the shell 1 by adhesive bonding.

[0084] like Figures 1 to 8 As shown, in step S1 , glue is applied to the outer wall of the conducting element 21 and inserted into the positioning hole 221 to achieve bonding and fixation with the positioning piece 22 .

[0085] In step S2 , glue is applied to one side of the pressure-sensitive element 3 and bonded to the input end of the positioning member 22 .

[0086] In step S4 , glue is applied to the outer wall of the positioning member 22 , and the positioning member 22 is bonded and fixed to the inner wall of the accommodating cavity 11 by the glue, thereby achieving connection between the positioning member 22 and the housing 1 .

[0087] Of course, in the embodiment of the present application, the positioning member 22 is not limited to the above connection method, and those skilled in the art can configure it according to actual needs. For example, the positioning member 22 and the housing 1 can be fixed by a threaded connection, and the conductive element 21 can be connected to the positioning member 22 by an interference fit.

[0088] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A pressure-sensitive probe is provided at the end of a cable (4), characterized in that, include: A housing (1), the housing (1) having a receiving cavity (11); A conducting component (2), the conducting component (2) being arranged in the accommodating cavity (11), The conducting component (2) comprises a conducting element (21) and a positioning member (22), the positioning member (22) has a positioning hole (221) opened in the axial direction, a plurality of the positioning holes (221) are arranged in the circumferential direction, the conducting element (21) passes through the positioning hole (221), and two opposite ends of the conducting element (21) respectively protrude from the positioning member (22), one end of the conducting element (21) is enclosed at the input end of the positioning member (22) to form a limiting portion (23), the other end of the conducting element (21) is connected to the cable (4) and is conducting, and the positioning member (22) is bonded to the accommodating cavity (11) to limit the position of the conducting element (21) in the accommodating cavity (11); A pressure-sensitive element (3) is bonded to the input end of the positioning member (22) and is clamped to the limiting portion (23); the pressure-sensitive element (3) is in conduction with the conducting element (21).

2. The pressure-sensitive probe according to claim 1, characterized in that, The positioning member (22) is made of a hard insulating material, and the positioning member (22) and the positioning hole (221) are integrally formed.

3. The pressure-sensitive probe according to claim 1, characterized in that, The housing (1) has a limiting cavity (12), the limiting cavity (12) is arranged at an end of the housing (1) away from the pressure-sensitive element (3), and the limiting cavity (12) is connected to the accommodating cavity (11), and a limiting member (13) is arranged in the limiting cavity (12), and the limiting member (13) is used to limit the position of the positioning member (22) in the accommodating cavity (11).

4. The pressure-sensitive probe according to claim 3, characterized in that, The limiting member (13) is a glue block formed by injecting glue into the limiting cavity (12) and solidifying to match the limiting cavity (12).

5. The pressure-sensitive probe according to claim 3, wherein, The accommodating cavity (11) and the limiting cavity (12) are arranged in sequence along the axial direction of the housing (1), and the radial dimension of the limiting cavity (12) is greater than the radial dimension of the accommodating cavity (11).

6. The pressure-sensitive probe according to claim 1, characterized in that, A protective cavity (14) is provided at one end of the housing (1) facing away from the limiting cavity (12), and the input ends of the pressure-sensitive element (3) and the conducting element (21) are both located in the protective cavity (14); The side of the protective cavity (14) facing away from the positioning member (22) has an open end, and the pressure-sensitive element (3) senses the medium pressure through the open end.

7. The pressure-sensitive probe according to claim 6, wherein, The open end is provided with a cover plate (15), and the cover plate (15) and the protective cavity (14) are enclosed to form a protective space; The cover plate (15) is provided with a plurality of through holes (151), the through holes (151) are communicated with the protective space, and the through holes (151) correspond to the pressure-sensitive elements (3).

8. A method for installing a pressure-sensitive probe, characterized in that, Used to assemble the pressure sensing probe according to any one of claims 1 to 7, the installation method of the pressure sensing probe comprises the following steps: S1: inserting the conducting element (21) through the positioning hole (221), and enclosing one end of a plurality of the conducting elements (21) at the input end of the positioning member (22) to form a limiting portion (23) adapted to the pressure-sensitive element (3); S2: attaching the pressure-sensitive element (3) to the input end of the positioning member (22), and clamping the pressure-sensitive element (3) to the limiting portion (23), so that the pressure-sensitive element (3) is in conduction with the conducting element (21); S3: connecting the core of the cable (4) to the end of the conductive element (21) facing away from the limiting portion (23) to achieve conduction, so that the pressure-sensitive element (3) and the cable (4) are connected via the conductive element (21); S4: inserting and bonding the positioning member (22) into the accommodating cavity (11) to fix the position of the positioning member (22) in the housing (1).

9. The installation method of the pressure-sensitive probe according to claim 8, wherein The step S5 is further included, and the step S5 is performed after the step S4 is completed. Wherein, the S5: injecting glue into the limiting cavity (12) of the shell (1), the glue solidifying to form a glue block adapted to the limiting cavity (12), and used to limit the position of the positioning member (22) in the axial direction within the shell (1).

10. The installation method of the pressure-sensitive probe according to claim 8, characterized in that, In S1, the conducting element (21) and the positioning hole (221) are fixed by adhesive bonding, in S2, the pressure-sensitive element (3) and the input end of the positioning member (22) are fixed by adhesive bonding, and in S4, the positioning member (22) and the inner wall of the housing (1) are fixedly connected by adhesive bonding.

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