Gas sensor

Abstract

The utility model discloses a gas sensor. The gas sensor comprises a first base, wherein the first base is provided with a first assembly hole, a first through hole and a second through hole; one first metal needle is inserted into the first through hole, and the other first metal needle is inserted into the second through hole; the second base is provided with a second assembly hole, a third through hole and a fourth through hole; one second metal needle is inserted into the third through hole, and the other second metal needle is inserted into the fourth through hole; the compensation element and the sensitive element jointly form a gas sensor element; the conductive column is in interference connection with the first assembly hole and the second assembly hole, and is electrically connected with the first metal needle in the second through hole and the second metal needle in the fourth through hole. According to the technical scheme of the utility model, after the conductive column is installed and the first metal needle and the second metal needle are inserted into the corresponding through holes, the first metal needle and the second metal needle can be electrically connected without other steps.

Description

Technical Field

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

[0002] As a key component that converts gas concentration into corresponding electrical signals, gas sensors are widely used in environmental monitoring, industrial control, home safety, public safety and other fields. In practical applications, the performance of gas sensors is affected by many environmental factors, such as temperature, humidity, interfering gases and toxic substances. These factors may cause the measurement accuracy of the sensor to decrease or even cause failure.

[0003] In traditional gas sensor designs, sensitive elements and compensating elements are usually bound to the same base to achieve compensation for temperature changes. This design requires that the sensitive element and the compensating element must have highly consistent temperature response characteristics to ensure measurement accuracy. However, such an integrated design has obvious limitations in practical applications. Once the temperature characteristics of the sensitive element and the compensating element are found to be mismatched, the replacement process will become complicated and time-consuming, which not only increases maintenance costs, but also affects the stable operation of the sensor.

[0004] To address the above issues, the exemplary technology adopts a design of two detachably connected bases, which are used to install the compensation element and the sensitive element respectively. The design aims to make the two bases separable. When the temperature characteristics of the sensitive element and the compensation element are inconsistent during testing, only the two bases need to be separated. Disassembly is convenient and replacement is easy.

[0005] However, although this solution solves the limitations of the integrated design to a certain extent, there is still the problem of cumbersome electrical connection process. Specifically, after the two bases are connected together, it is necessary to connect the metal needle on one base (the metal needle is electrically connected to the compensation element) with the metal needle on the other base (the metal needle is electrically connected to the sensitive element). How to avoid this step and achieve electrical connection between the metal needles of the two bases while achieving fixed connection between the two bases has become a difficult problem faced by technical personnel in this field. Utility Model Content

[0006] The main purpose of the utility model is to provide a gas sensor, aiming to solve the technical problem that the assembly process of the gas sensor in the prior art is too complicated.

[0007] To achieve the above-mentioned purpose, the gas sensor proposed in the utility model includes a first base, two first metal needles, a second base, two second metal needles, a sensitive element, a compensation element and a conductive column. The first base is provided with a first assembly hole, a first through hole and a second through hole. The first assembly hole is provided on the peripheral wall of the first base, the first through hole extends from the top wall surface of the first base to the bottom wall surface of the first base, and the second through hole extends from the top wall surface of the first base to the first assembly hole; one of the first metal needles is inserted into the first through hole, and the other of the first metal needles is inserted into the second through hole; the second base is provided with a second assembly hole, a third through hole and a fourth through hole, the second assembly hole is provided on the peripheral wall of the second base, and the third through hole extends from the top wall surface of the first base to the first assembly hole. The top wall of the second base extends to the bottom wall of the second base, and the fourth through hole extends from the top wall of the second base to the second assembly hole; one of the second metal needles is inserted in the third through hole, and another of the second metal needles is inserted in the fourth through hole; a sensitive element is arranged on the top wall of the first base and is respectively connected to the two first metal needles; a compensation element is arranged on the top wall of the second base and is respectively connected to the two second metal needles, and the compensation element and the sensitive element together constitute a gas sensor element; the conductive column is respectively interference-connected with the first assembly hole and the second assembly hole, and the conductive column is respectively electrically connected to the first metal needle in the second through hole and the second metal needle in the fourth through hole.

[0008] In a possible implementation, a portion of the conductive column peripheral wall located in the first assembly hole is provided with a first annular groove, the first annular groove is connected to the second through hole, and the first metal needle in the second through hole can be inserted into the first annular groove.

[0009] In a possible embodiment, the groove wall of the first annular groove includes two opposite first side walls, and a first conductive elastic sheet is fixedly provided on at least one of the first side walls. The first conductive elastic sheet can be elastically deformed between the two first side walls, and the first conductive elastic sheet is used to elastically squeeze the portion of the first metal needle located in the first annular groove.

[0010] In a possible implementation, a portion of the conductive column peripheral wall located in the second assembly hole is provided with a second annular groove, the second annular groove is connected to the fourth through hole, and the second metal needle in the fourth through hole can be inserted into the second annular groove.

[0011] In a possible embodiment, the groove wall of the second annular groove includes two opposite second side walls, and a second conductive elastic sheet is fixedly provided on at least one of the second side walls. The second conductive elastic sheet can be elastically deformed between the two second side walls, and the second conductive elastic sheet is used to elastically squeeze the part of the second metal needle located in the second annular groove.

[0012] In a possible implementation manner, the sum of the length of the first assembly hole and the length of the second assembly hole is the same as the length of the conductive column.

[0013] In the gas sensor of the technical solution of the utility model, after the conductive column is inserted into the first assembly hole and the second assembly hole, when the first metal needle and the second metal needle are respectively inserted into the position of contacting the conductive column, a direct electrical connection between the two is achieved without the need for other complicated steps. This design simplifies the electrical connection process between the sensitive element and the compensation element, and greatly reduces the complexity of assembling and maintaining the gas sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 the structures shown in these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of a gas sensor of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the decomposition of

[0017] Figure 3 for Figure 2 A structural diagram from another perspective;

[0018] Figure 4 for Figure 1 Schematic cross-section diagram of .

[0019] Description of Figure Numbers:

[0020] 1. First base; 11. First assembly hole; 12. First through hole; 13. Second through hole; 2. First metal needle; 3. Second base; 31. Second assembly hole; 32. Third through hole; 33. Fourth through hole; 4. Second metal needle; 5. Conductive column; 51. First annular groove; 511. First side wall; 52. First conductive elastic sheet; 53. Second annular groove; 531. Second side wall; 54. Second conductive elastic sheet.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, which must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] The utility model provides a gas sensor.

[0026] In the embodiment of the present utility model, Figures 1 to 4As shown, the gas sensor includes a first base 1, two first metal needles 2, a second base 3, two second metal needles 4, a sensitive element, a compensation element and a conductive column 5. The first base 1 is provided with a first assembly hole 11, a first through hole 12 and a second through hole 13. The first assembly hole 11 is provided on the peripheral wall of the first base 1, the first through hole 12 extends from the top wall surface of the first base 1 to the bottom wall surface of the first base 1, and the second through hole 13 extends from the top wall surface of the first base 1 to the first assembly hole 11; one of the first metal needles 2 is inserted into the first through hole 12, and the other of the first metal needles 2 is inserted into the second through hole 13; the second base 3 is provided with a second assembly hole 31, a third through hole 32 and a fourth through hole 33. The second assembly hole 31 is provided on the peripheral wall of the second base 3, and the third through hole 32 The fourth through hole 33 extends from the top wall of the second base 3 to the bottom wall of the second base 3, and extends from the top wall of the second base 3 to the second assembly hole 31; one second metal needle 4 is inserted in the third through hole 32, and another second metal needle 4 is inserted in the fourth through hole 33; the sensitive element is arranged on the top wall of the first base 1 and is respectively connected to the two first metal needles 2; the compensation element is arranged on the top wall of the second base 3 and is respectively connected to the two second metal needles 4, and the compensation element and the sensitive element together constitute a gas sensor element; the conductive column 5 is respectively interference-connected with the first assembly hole 11 and the second assembly hole 31, and the conductive column 5 is respectively electrically connected to the first metal needle 2 in the second through hole 13 and the second metal needle 4 in the fourth through hole 33.

[0027] In the existing design, after the first base 1 and the second base 3 are fixed together, the first metal needle 2 and the second metal needle 4 need to be inserted into the corresponding sockets respectively, and then, one first metal needle 2 is grounded, and the other first metal needle 2 is connected to a second metal needle 4 by physical connection, and the remaining second metal needle 4 is connected to the external circuit.

[0028] The design of the present application achieves fixing the first base 1 and the second base 3 together after the conductive column 5 is inserted into the first assembly hole 11 and the second assembly hole 31. Then, after the first metal needle 2 is inserted into the second through hole 13 and the second metal needle 4 is inserted into the fourth through hole 33, the first metal needle 2 can be electrically connected to the second metal needle 4 through the conductive column 5. In this way, there is no need to connect the first metal needle 2 and the second metal needle 4 together through additional steps after inserting the first metal needle 2 and the second metal needle 4, thereby simplifying the steps.

[0029] A first annular groove 51 is formed on a portion of the peripheral wall of the conductive column 5 located in the first assembly hole 11 . The first annular groove 51 is connected to the second through hole 13 , and the first metal needle 2 in the second through hole 13 can be inserted into the first annular groove 51 .

[0030] This design allows the first metal needle 2 to be directly inserted into the predetermined first annular groove 51 during assembly, thereby achieving a stable electrical connection with the conductive column 5. At the same time, when the first metal needle 2 is inserted into the first annular groove 51 and forms an electrical connection with the conductive column 5, their mutual mechanical engagement further locks the position of the conductive column 5, reducing the risk of the conductive column 5 loosening or falling off due to vibration, collision or long-term use.

[0031] During disassembly and assembly, it is only necessary to first remove the first metal needle 2 from the first annular groove 51 .

[0032] The groove wall of the first annular groove 51 includes two opposite first side walls 511, and a first conductive elastic sheet 52 is fixedly provided on at least one of the first side walls 511. The first conductive elastic sheet 52 can be elastically deformed between the two first side walls 511, and the first conductive elastic sheet 52 is used for elastically squeezing the part of the first metal needle 2 located in the first annular groove 51.

[0033] The introduction of the first conductive elastic sheet 52 allows the first metal needle 2 to be elastically squeezed by its elastic deformation during the assembly process, thereby ensuring that good electrical contact can be maintained even with slight displacement caused by vibration or temperature changes during long-term use. This elastic squeezing effect effectively reduces the problem of poor contact caused by looseness or wear of the electrical connection point, greatly improving the stability and reliability of the gas sensor.

[0034] In addition, the application of the first conductive elastic sheet 52 also provides a certain degree of adaptability, which can adapt to metal needles of different thicknesses or slight position errors during the assembly process, thereby ensuring the efficiency and durability of the electrical connection. Through this design, the gas sensor can still maintain accurate and reliable measurement performance when facing complex or harsh operating environments, ensuring the needs of long-term stable operation and significantly improving the performance of the sensor in actual applications.

[0035] A second annular groove 53 is formed on the peripheral wall of the conductive column 5 in the second assembly hole 31 . The second annular groove 53 is connected to the fourth through hole 33 . The second metal needle 4 in the fourth through hole 33 can be inserted into the second annular groove 53 .

[0036] This design allows the second metal needle 4 to be directly inserted into the predetermined second annular groove 53 during assembly, thereby achieving a stable electrical connection with the conductive column 5. At the same time, when the second metal needle 4 is inserted into the second annular groove 53 and forms an electrical connection with the conductive column 5, their mutual mechanical engagement further locks the position of the conductive column 5, reducing the risk of the conductive column 5 loosening or falling off due to vibration, collision or long-term use.

[0037] During disassembly and assembly, it is only necessary to first remove the second metal needle 4 from the second annular groove 53 .

[0038] The groove wall of the second annular groove 53 includes two opposite second side walls 531, and a second conductive elastic sheet 54 is fixedly provided on at least one of the second side walls 531. The second conductive elastic sheet 54 can be elastically deformed between the two second side walls 531, and the second conductive elastic sheet 54 is used for elastically squeezing the part of the second metal needle 4 located in the second annular groove 53.

[0039] The introduction of the second conductive elastic sheet 54 allows the second metal needle 4 to be elastically squeezed by its elastic deformation during the assembly process, thereby ensuring that good electrical contact can be maintained even with slight displacements caused by vibration or temperature changes during long-term use. This elastic squeezing effect effectively reduces the problem of poor contact caused by looseness or wear of the electrical connection point, greatly improving the stability and reliability of the gas sensor.

[0040] In addition, the application of the second conductive elastic sheet 54 also provides a certain degree of adaptability, which can adapt to metal needles of different thicknesses or small position errors during the assembly process, ensuring the efficiency and durability of the electrical connection. Through this design, the gas sensor can still maintain accurate and reliable measurement performance when facing complex or harsh operating environments, ensuring the needs of long-term stable operation, and significantly improving the performance of the sensor in practical applications.

[0041] The sum of the length of the first assembly hole 11 and the length of the second assembly hole 31 is the same as the length of the conductive column 5 .

[0042] This precise size matching ensures that during the assembly process, the conductive pillar 5 can properly pass through and be fixed in the two bases without any excess or shortage, thereby ensuring that after connection, the first base 1 and the second base 3 can fit tightly together.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A gas sensor, characterized in that: include: A first base (1) is provided with a first assembly hole (11), a first through hole (12) and a second through hole (13); the first assembly hole (11) is provided on a peripheral wall of the first base (1); the first through hole (12) extends from a top wall surface of the first base (1) to a bottom wall surface of the first base (1); and the second through hole (13) extends from a top wall surface of the first base (1) to an interior of the first assembly hole (11); two first metal needles (2), one of the first metal needles (2) being inserted into the first through hole (12), and the other of the first metal needles (2) being inserted into the second through hole (13); The second base (3) is provided with a second assembly hole (31), a third through hole (32) and a fourth through hole (33), wherein the second assembly hole (31) is provided on the peripheral wall of the second base (3), the third through hole (32) extends from the top wall surface of the second base (3) to the bottom wall surface of the second base (3), and the fourth through hole (33) extends from the top wall surface of the second base (3) to the inside of the second assembly hole (31); two second metal needles (4), one of the second metal needles (4) being inserted into the third through hole (32), and the other of the second metal needles (4) being inserted into the fourth through hole (33); A sensitive element, arranged on the top wall of the first base (1) and connected to the two first metal needles (2) respectively; A compensation element, which is arranged on the top wall surface of the second base (3) and is respectively connected to the two second metal needles (4), wherein the compensation element and the sensitive element together constitute a gas sensor element; as well as The conductive column (5) is respectively interference-connected with the first assembly hole (11) and the second assembly hole (31), and the conductive column (5) is respectively electrically connected with the first metal needle (2) in the second through hole (13) and the second metal needle (4) in the fourth through hole (33).

2. The gas sensor according to claim 1, characterized in that A first annular groove (51) is provided on the peripheral wall of the conductive column (5) in the first assembly hole (11); the first annular groove (51) is connected to the second through hole (13); and the first annular groove (51) allows the first metal needle (2) in the second through hole (13) to be inserted.

3. The gas sensor according to claim 2, characterized in that The groove wall of the first annular groove (51) comprises two opposite first side walls (511), and a first conductive elastic sheet (52) is fixedly provided on at least one of the first side walls (511). The first conductive elastic sheet (52) can be elastically deformed between the two first side walls (511), and the first conductive elastic sheet (52) is used to elastically squeeze the portion of the first metal needle (2) located in the first annular groove (51).

4. The gas sensor according to claim 1, wherein: A second annular groove (53) is provided on the peripheral wall of the conductive column (5) in the portion located in the second assembly hole (31); the second annular groove (53) is connected to the fourth through hole (33); and the second annular groove (53) allows the second metal needle (4) in the fourth through hole (33) to be inserted.

5. The gas sensor according to claim 4, characterized in that The groove wall of the second annular groove (53) comprises two opposite second side walls (531), and a second conductive elastic sheet (54) is fixedly provided on at least one of the second side walls (531). The second conductive elastic sheet (54) is elastically deformable between the two second side walls (531), and the second conductive elastic sheet (54) is used to elastically squeeze the portion of the second metal needle (4) located in the second annular groove (53).

6. The gas sensor according to any one of claims 1 to 5, characterized in that: The sum of the length of the first assembly hole (11) and the length of the second assembly hole (31) is the same as the length of the conductive column (5).

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