CN215574813U - Gas sensor structure - Google Patents
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- CN215574813U CN215574813U CN202121408233.7U CN202121408233U CN215574813U CN 215574813 U CN215574813 U CN 215574813U CN 202121408233 U CN202121408233 U CN 202121408233U CN 215574813 U CN215574813 U CN 215574813U
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Abstract
The utility model discloses a gas sensor structure, which comprises a sensing element and a terminal assembly, wherein the sensing element is arranged on the terminal assembly; the terminal assembly comprises a bracket and at least three contact terminals, wherein the at least three contact terminals are respectively arranged at two sides of the central line of the top end of the bracket, the contact terminals at two sides are respectively contacted with two opposite side surfaces of the end part of the sensing element to form electric connection, and the sensing element is elastically clamped and arranged at the top end of the bracket; the contact terminals on the two sides of the central line are opposite and staggered with each other. According to the utility model, the contact terminal and the electrode terminal are in an elastic contact mode of mutual dislocation at two opposite sides of the electrode terminal, so that the electrode terminal is subjected to an integrally balanced elastic force, and therefore, the electrode terminal is not easy to deform or even damage; because the elastic parts at the two opposite sides of the terminal assembly are staggered and do not elastically extrude, the mismatching is not easy to occur when the sensing element is installed; the utility model is suitable for popularization and use in the field of gas sensors, and is particularly suitable for being applied to oxygen sensors in the field of automobiles.
Description
Technical Field
The utility model relates to the field of sensors, in particular to a gas sensor structure.
Background
A gas sensor is a detection technology that takes a certain characteristic of a gas as a test target and converts the characteristic into a signal readable by an instrument, thereby completing a gas test. Gas sensors have found wide application in many fields, such as oxygen sensors in the automotive field. In an automobile using a three-way catalytic converter to reduce exhaust pollution, an oxygen sensor is an indispensable core element, and the oxygen sensor mainly functions to detect the concentration of oxygen in exhaust gas, feed the oxygen back to an ECU, and control the fuel injection amount by the ECU so that the air-fuel ratio of a mixture is controlled to be close to a theoretical value.
The core component of the gas sensor is a sensing element made of ceramic, for example, the oxygen sensor generally adopts porous ZrO2As a sensing element. The structure of a common sensing element is generally that one end serves as a detection end, the other end serves as a signal output end, the signal output end generally has two opposite terminal surfaces, and electrode terminals are arranged on the two terminal surfaces to transmit gas signals detected by the detection end or to heat the sensing element. The gas sensor generally further includes a contact terminal electrically connected to the electrode terminal to transmit a signal of the sensing element. In general, in order to ensure a good contact effect, the contact terminal and the electrode terminal are elastically contacted, that is, the contact terminal and the electrode terminal have an elastic force generated by deformation, and therefore, an elastic portion is generally provided on the contact terminal to generate an elastic forceAnd elastically deforming to achieve elastic contact between the contact terminal and the electrode terminal. However, since both terminal surfaces of the signal output terminal are in elastic contact, the signal output terminal may be deformed due to uneven elasticity applied to both terminal surfaces, which may affect the service life, and if the deformation is too large, the sensor element may be damaged.
In order to avoid the unbalanced elastic force applied to the output signal terminal, it is necessary to consider the arrangement of the electrode terminals on the terminal surfaces, the arrangement of the elastic portions of the contact terminals contacting the electrode terminals, and the magnitude of the elastic force applied to the two terminal surfaces. The prior patents often adopt a technical solution that the electrode terminals of the two terminal surfaces are oppositely arranged, and the elastic forces applied to the oppositely arranged electrode terminals are mutually offset to ensure the balance of the forces, such as the prior patents CN207426230U and CN 104101635B. However, the number of the electrode terminals on the two terminal surfaces is often different and not on the same horizontal line, so that it is difficult to ensure the balance of the overall force, and there is still a risk that the sensing element is damaged. In addition, before the elastic portions are electrically connected to the electrode terminals in the prior patent, the opposing elastic portions are in contact with each other and a pre-compressed state exists, and therefore, when the sensor element is mounted between the contact terminals, it is necessary to ensure high mounting accuracy, otherwise, mutual misalignment of the contact terminals may occur, which may result in failure of the electrical connection.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a gas sensor structure, which realizes that when the number of electrode terminals of two opposite terminal surfaces of a signal output end is different, the whole stress of the signal output end is balanced and the contact terminals are not easy to mismatch.
In order to solve the technical problem, the utility model provides a gas sensor structure, which comprises a sensing element and a terminal assembly;
the terminal assembly comprises a bracket and at least three contact terminals, wherein the at least three contact terminals are respectively installed on two sides of the center line of the top end of the bracket, the contact terminals on two sides are respectively contacted with two opposite side surfaces of the end part of the sensing element to form electric connection, and the sensing element is elastically clamped and installed on the top end of the bracket;
the contact terminals on the two sides of the central line are opposite and staggered with each other.
Preferably, the top end of the bracket is provided with jacks with the same number as the contact terminals, and the jacks are distributed on two sides of the center line;
the contact terminal comprises an installation part and an elastic part, wherein the elastic part is formed at one end of the installation part and is bent relative to the installation part, the elastic parts of the contact terminal at two sides are opposite and staggered, and the tail end of the elastic part at the same side is flush with the installation part which is close to the opposite side and extends beyond the central line;
the contact terminal is inserted into the insertion hole through the mounting part to be assembled with the bracket into the terminal assembly.
Preferably, the number of the contact terminals on both sides of the center line is m and n, respectively, and the distance between the ends of the m elastic parts and the center line is dmSetting the distance between the tail ends of the n elastic parts and the central line as dn；
When m is equal to n, dmIs equal to dn；
When m is greater than n, dmIs less than dn。
Preferably, the mounting part comprises a main body, a limiting part and a connecting part;
the limiting part extends along the width direction of the main body and bends relative to the main body, the bending direction of the limiting part is opposite to that of the elastic part, and the limiting part is positioned at one end of the main body close to the elastic part;
the connecting part extends along the width direction of the main body and is bent relative to the main body, the bending direction of the connecting part is the same as that of the elastic part, and the connecting part is positioned at one end of the main body, which is far away from the elastic part;
the top end of the bracket is also provided with a limiting groove, and the limiting groove is provided with a side wall of the jack;
the limiting part is arranged in the limiting groove to limit the contact terminal;
the installation department inserts behind the jack, connecting portion are located the below of support bottom.
Preferably, the jacks include a first jack, a second jack, a third jack, a fourth jack, and a fifth jack;
the first jack and the second jack are positioned on the same side of the center line, the third jack, the fourth jack and the fifth jack are positioned on the other side of the center line, the first jack and the fifth jack are arranged diagonally, and the second jack and the third jack are arranged diagonally;
the contact terminals comprise a first contact terminal, a second contact terminal, a third contact terminal, a fourth contact terminal and a fifth contact terminal;
the body of the first contact terminal is inserted into the first insertion hole, the body of the second contact terminal is inserted into the second insertion hole, the body of the third contact terminal is inserted into the third insertion hole, the body of the fourth contact terminal is inserted into the fourth insertion hole, and the body of the fifth contact terminal is inserted into the fifth insertion hole.
Preferably, one side of the main body of the first contact terminal, the second contact terminal, the third contact terminal and the fifth contact terminal is provided with a limiting portion, and two sides of the main body of the fourth contact terminal are provided with limiting portions.
Preferably, fastening portions are formed on two sides of the main body of each of the first contact terminal, the second contact terminal, the third contact terminal and the fifth contact terminal, the fastening portions are oppositely arranged, the fastening portions extend in the width direction of the main body and are bent relative to the main body, and the bending direction of the fastening portions is the same as that of the elastic portions;
the side edge of at least one of the fastening parts extends towards the direction far away from the opposite side to form an elastic sheet;
the installation department inserts behind the jack, fastening portion is located in the jack, the flexure strip with the lateral wall of jack forms elastic contact and will installation department fastening installation in the jack.
Preferably, the first contact terminal and the fifth contact terminal are identical in shape, and the second contact terminal and the third contact terminal are identical in shape.
Preferably, the bracket is made of an insulating ceramic material.
Preferably, one end of the sensing element is formed as a probe end, the other end of the sensing element is formed as a signal output end, the signal output end has a first terminal surface and a second terminal surface which are oppositely arranged, electrode terminals are arranged along the width direction of the first terminal surface and the second terminal surface, and the electrode terminals are electrically connected with the contact terminals.
The number of the electrode terminals is the same as the number of the contact terminals;
one end of the electrode terminal located at the end of the signal output terminal is flush.
According to the utility model, the contact terminal and the electrode terminal are in an elastic contact mode of mutual dislocation at two opposite sides of the electrode terminal, so that the electrode terminal is subjected to an integrally balanced elastic force, and the situations of deformation, even damage and the like caused by unbalanced stress are not easy to occur in long-term use; because the elastic parts at the two opposite sides of the terminal component are staggered without elastic extrusion before the sensor element is installed, the electrical connection failure caused by mismatching is not easy to occur when the sensor element is installed; the utility model is suitable for popularization and use in the field of gas sensors, and is particularly suitable for being applied to oxygen sensors in the field of automobiles.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of one embodiment of a gas sensor of the present invention;
FIG. 2 is a schematic structural view of a terminal assembly of one embodiment of the gas sensor of the present invention;
FIG. 3 is a top view of a terminal assembly of one embodiment of the gas sensor of the present invention;
FIG. 4 is a top view of a support for one embodiment of the gas sensor of the present invention;
FIG. 5 is a schematic structural view of a support of an embodiment of the gas sensor of the present invention;
FIG. 6 is a schematic view of the distance between the elastic ends and the center line of two different numbers of two-sided contact terminals of one embodiment of the gas sensor of the present invention;
FIG. 7 is a side view of a first contact terminal and a fifth contact terminal of one embodiment of the gas sensor of the present invention;
FIG. 8 is a perspective view of a first contact terminal and a fifth contact terminal of one embodiment of the gas sensor of the present invention;
FIG. 9 is a side view of the second and third contact terminals of one embodiment of the gas sensor of the present invention;
FIG. 10 is a side view of a fourth contact terminal of an embodiment of the gas sensor of the present invention;
FIG. 11 is a perspective view of a fourth contact terminal of one embodiment of the gas sensor of the present invention;
FIG. 12 is a schematic view of a first terminal face of a sensing element of one embodiment of the gas sensor of the present invention;
FIG. 13 is a schematic diagram of a second terminal surface of a sensing element of an embodiment of the gas sensor of the present invention.
In the figure, 1-the sensing element; a 2-terminal assembly; 11-a detection end; 12-a signal output; 13-an electrode terminal; 14-a first terminal face; 15-a second terminal face; 21-a scaffold; 22-contact terminals; 22A-first contact terminal; 22B-a second contact terminal; 22C — a third contact terminal; 22D-fourth contact terminal; 22E-fifth contact terminalA seed; 211-the centre line; 212-a jack; 212A-a first receptacle; 212B-a second receptacle; 212C-third jack; 212D-a fourth jack; 212E-a fifth jack; 213-a limit groove; 221-a mounting portion; 222-a resilient portion; 2211-main body; 2212-a limiting part; 2213-connecting part; 2214-fastening parts; 2215-elastic sheet; dm-the distance between the end of the elastic part on one side with the number m and the center line; dn-the distance between the tip of the elastic part of one side of the number n and the centre line.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, there is shown a gas sensor structure of the present invention, comprising a sensing element 1, a terminal assembly 2; the terminal assembly 2 comprises a bracket 21 and at least three contact terminals 22, wherein the at least three contact terminals 22 are respectively installed at two sides of a center line 211 at the top end of the bracket 21, the contact terminals 22 at two sides are respectively contacted with two opposite side surfaces of the end part of the sensing element 1 to form electric connection, and the sensing element 1 is elastically clamped and installed at the top end of the bracket 21; the contact terminals 22 on both sides of the center line 211 are arranged opposite to each other and shifted from each other.
In the embodiment of the present invention, the two opposite side surfaces of one end of the sensing element 1 are elastically clamped by the plurality of contact terminals 22, the contact terminals 22 on the two opposite sides are arranged to be mutually staggered, and for the sensing element 1, the two elastically clamped side surfaces of the end portion of the sensing element 1 and the elastic contact points of the contact terminals 22 are also mutually staggered, so that when the number of the contact terminals 22 on the two sides is different, the end portion of the sensing element 1 can also realize the whole stress balance, and further is not easy to deform or even damage in use; in addition, since the contact terminals 22 are misaligned with each other before the sensor element 1 is mounted, that is, the contact terminals 22 on the opposite sides are not pressed against each other, as shown in fig. 2 and 3, the sensor element 1 is not easily subjected to an electrical connection failure due to a mismatch.
Referring to fig. 4 and 5, preferably, the top end of the bracket 21 is provided with the same number of insertion holes 212 as the number of the contact terminals 22, and the insertion holes 212 are distributed on two sides of the center line 211; the contact terminal 22 comprises a mounting portion 221 and an elastic portion 222, the elastic portion 222 is formed at one end of the mounting portion 221 and is bent relative to the mounting portion 221, the elastic portions 222 of the contact terminal 22 at two sides are arranged oppositely and in a staggered manner, and the tail end of the elastic portion 222 at the same side is flush with and extends beyond the center line 211 to the mounting portion 221 near the opposite side; the contact terminal 22 is inserted into the insertion hole 212 through the mounting portion 221 to be assembled with the bracket 21 into the terminal assembly 2.
In the embodiment of the present invention, the assembly method of the bracket 21 and the contact terminal 22 is to insert the contact terminal 22 into the insertion hole 212 formed in the bracket 21 and assemble the contact terminal into the terminal assembly 2; after the assembly is completed, the elastic portions 222 of the contact terminals 22 are located at the top end of the support 21, the elastic portions 222 at two sides are arranged oppositely and in a staggered manner, so that mutual extrusion between the elastic portions 222 at two opposite sides is avoided, the tail ends of the elastic portions 222 at the same side are flush to generate the same elastic force, the tail end of the elastic portion 222 at one side extends to the other side of the center line 211 exceeding the top end of the support 21, the elastic portions 222 of the contact terminals 22 at two sides are arranged in a staggered and overlapped manner at the center line 211, so that when one end of the sensing element 1 is inserted between the elastic portions 222 along the axial direction and the width direction of the support 21 in parallel to the center line 211, the elastic portions 222 are deformed to generate the elastic force, and the sensing element 1 is elastically clamped and mounted at the top end of the support 21.
Referring to fig. 6, preferably, the number of the contact terminals 22 on both sides of the center line is m, n, respectively, and the distance d between the end of the m elastic parts 222 and the center line 211 is set as mmThe distance d between the ends of the n elastic parts 222 and the center line 211 is set asn(ii) a When m is equal to n, dmIs equal to dn(ii) a When m is greater than n, dm is less than dn. Understandably, this is provided for mounting the sensor element 1 to the contact terminals22, the sensor element 1 is located at the centre line 211.
Referring to fig. 7, 8, 9, 10 and 11, preferably, the mounting portion 221 includes a main body 2211, a stopper portion 2212, and a connecting portion 2213; the stopper portion 2212 extends in the width direction of the main body 2211 and is bent with respect to the main body 2211, the bending direction of the stopper portion 2212 is opposite to the bending direction of the elastic portion 222, and the stopper portion 2212 is located at one end of the main body 2211 close to the elastic portion 222; the connecting portion 2213 extends in the width direction of the main body 2211 and is bent with respect to the main body 2211, the bending direction of the connecting portion 2213 is the same as the bending direction of the elastic portion 222, and the connecting portion 2213 is located at one end of the main body 2211 away from the elastic portion 222; the top end of the bracket 21 is further provided with a limit groove 213, and the limit groove 213 is provided with a side wall of the jack 212; the position-limiting portion 2212 is placed in the position-limiting groove 213 to limit the contact terminal 22; after the mounting portion 221 is inserted into the insertion hole 212, the connecting portion 2213 is located below the bottom end of the bracket 21.
In the embodiment of the present invention, the mounting portion 221 of the contact terminal 22 is inserted into the insertion hole 212 to achieve the assembly between the contact terminal 22 and the bracket 21, wherein the position-limiting portion 2212 is disposed in the position-limiting groove 213 to achieve the position limitation of the position-limiting portion 2212 on the bracket 21; the connection portion 2213 is located below the bottom surface of the bracket 21 so as to be electrically connected to a wire harness (not shown) that transmits a signal.
Referring to fig. 3 and 4, preferably, the jacks 212 include a first jack 212A, a second jack 212B, a third jack 212C, a fourth jack 212D, and a fifth jack 212E; the first jack 212A and the second jack 212B are located on the same side of the center line 211, the third jack 212C, the fourth jack 212D and the fifth jack 212E are located on the other side of the center line 211, the first jack 212A and the fifth jack 212E are arranged diagonally, and the second jack 212B and the third jack 212C are arranged diagonally; the contact terminals 22 include a first contact terminal 22A, a first contact terminal 22B, a third contact terminal 22C, a fourth contact terminal 22D, and a fifth contact terminal 22E; the body 2211 of the first contact terminal 22A is inserted into the first insertion hole 212A, the body 2211 of the first contact terminal 22B is inserted into the second insertion hole 212B, the body 2211 of the third contact terminal 22C is inserted into the third insertion hole 212C, the body 2211 of the fourth contact terminal 22D is inserted into the fourth insertion hole 212D, and the body 2211 of the fifth contact terminal 22E is inserted into the fifth insertion hole 212E. In the embodiment of the present invention, the provision of five contact terminals and five insertion holes 212 can satisfy the use requirements of a general gas sensor, particularly an oxygen sensor.
Referring to fig. 8, 9 and 11, preferably, the first contact terminal 22A, the first contact terminal 22B, the third contact terminal 22C and the fifth contact terminal 22E are provided with a stopper 2212 at one side of the main body 2211, and the fourth contact terminal 22D is provided with stoppers 2212 at both sides of the main body 2211.
In the embodiment of the present invention, as shown in fig. 3, since the positions of the first contact terminal 22A, the first contact terminal 22B, the third contact terminal 22C and the fifth contact terminal 22E correspond to the four corners of the rectangle formed by the four contact terminals 22, and the position-limiting portion 2212 is disposed on one side of the main body 2211 of the four contact terminals 22, the position limitation of the four contact terminals 22 can be realized; the fourth contact terminal 22D is located between the third contact terminal 22C and the fifth contact terminal 22E, which is equivalent to being located on one side of the rectangle, and the position-limiting portions 2212 are respectively arranged on two sides of the main body 2211 of the fourth contact terminal 22D, so that better position limitation can be realized. Understandably, the distance between the sides of the two opposite limiting portions 2212 of the fourth contact terminal 22D far from the main body 2211 is smaller than the distance of the corresponding positions of the corresponding limiting grooves 213, so that the elastic fastening installation of the fourth contact terminal 22D can be realized, which is easily understood by those skilled in the art, and therefore, the illustration and further description are not given.
Preferably, fastening portions 2214 are formed on two sides of the main body 2211 of the first contact terminal 22A, the first contact terminal 22B, the third contact terminal 22C and the fifth contact terminal 22E, the fastening portions 2214 extend in the width direction of the main body 2211 and are bent relative to the main body 2211, and the bending direction of the fastening portions 2214 is the same as that of the elastic portion 222; the side edge of at least one of the fastening portions 2214 is extended toward the direction away from the opposite side to form an elastic piece 2215; after the installation part 221 is inserted into the insertion hole 212, the fastening part 2214 is positioned in the insertion hole 212, and the elastic piece 2215 is elastically contacted with the side wall of the insertion hole 212 to fasten and install the installation part 221 in the insertion hole 212.
In the embodiment of the present invention, the fastening portion 2214 is generally perpendicular to the main body 2211, that is, the fastening portion 2214 extends from the width direction of the main body 2211 to be perpendicular to the main body 2211, the fastening portions 2214 on both sides of the main body 2211 are parallel to each other, and the distance between the fastening portions 2214 on both sides is equal to or slightly smaller than the width of the corresponding insertion hole 212, that is, the fastening portion 2214 can be inserted into the insertion hole 212, but at this time, the mounting portion 221 and the insertion hole 212 can freely move along the axial direction of the insertion hole 212, that is, the contact terminal 22 cannot be tightly mounted on the bracket 21; the fastening portion 2214 is formed by extending along one side edge of the fastening portion 2214 and bending the fastening portion 2214 away from the opposite side, and the distance between the set end and the fastening portion 2214 on the opposite side in the width direction is larger than the width of the corresponding insertion hole 212, at this time, when the fastening portion 2214 is inserted into the insertion hole 212, the side wall of the insertion hole 212 presses the elastic piece 2215 to deform the elastic piece 2215 to generate elastic force so as to elastically fasten the fastening portion 2214 in the insertion hole 212.
Preferably, the first contact terminal 22A and the fifth contact terminal 22E are identical in shape, and the first contact terminal 22B and the third contact terminal 22C are identical in shape. Therefore, the five contact terminals 22 can be completed by three-time mold opening, and the mold opening cost is greatly saved. Fig. 6 and 7 are schematic structural views of the first contact terminal 22A and the fifth contact terminal 22E, fig. 8 is a schematic structural view of the second contact terminal 22B and the third contact terminal 22C, and fig. 9 and 10 are schematic structural views of the fourth contact terminal 22D.
Preferably, the material of the bracket 21 is an insulating ceramic material. The ceramic material still has good insulating property at high temperature and stable performance.
Referring to fig. 12 and 13, a schematic structural diagram of a sensor element 1 of the present invention is shown, one end of the sensor element 1 is formed as a detection end 11, the other end of the sensor element 1 is formed as a signal output end 12, the signal output end 12 has a first terminal surface 14 and a second terminal surface 15 which are oppositely arranged, an electrode terminal 13 is arranged along the width direction of the first terminal surface 14 and the second terminal surface 15, and the electrode terminal 13 is electrically connected with the contact terminal 22.
In the embodiment of the present invention, the first terminal face 14 is provided with three electrode terminals 13, the second terminal face 15 is provided with two electrode terminals 13, the three electrode terminals 13 of the first terminal face 14 are electrically connected with the third contact terminal 22C, the fourth contact terminal 22D and the fifth contact terminal 22E, respectively, and the two electrode terminals 13 of the second terminal face 15 are electrically connected with the first contact terminal 22A and the second contact terminal 22B, respectively; the number of the electrode terminals 13 is the same as the number of the contact terminals 22; one end of the electrode terminal 13 at the end of the signal output terminal 12 is flush.
Understandably, since the tip of the elastic part 222 is disposed flush, one end of the electrode terminal 13 at the end of the signal output terminal 12 is flush so as to be electrically connected with the elastic part 222. In the terminal assembly 2 of the present embodiment, the deformation of the elastic portions 222 of the contact terminals 22 located on the same side is the same, and the tail ends are located on the same horizontal line in the width direction of the signal output end 12, so as to ensure that the stress on the same side of the signal output end 12 is uniform; the elastic parts 222 on different sides are distributed in a staggered manner, so that the stress balance on two sides of the signal output end 12 is ensured, therefore, the whole stress of the signal output end 12 is in a balanced state, the signal output end is not easy to deform or be damaged, and the quality and the service life of the sensing element 1 are ensured.
In summary, the contact terminal and the electrode terminal are in an elastic contact manner of mutual dislocation at two opposite sides of the electrode terminal, so that the electrode terminal is subjected to an overall balanced elastic force, and the situations of deformation and even damage caused by unbalanced stress are not easy to occur in long-term use; because the elastic parts at the two opposite sides of the terminal component are staggered without elastic extrusion before the sensor element is installed, the electrical connection failure caused by mismatching is not easy to occur when the sensor element is installed; the utility model is suitable for popularization and use in the field of gas sensors, and is particularly suitable for being applied to oxygen sensors in the field of automobiles.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A gas sensor structure is characterized by comprising a sensing element and a terminal assembly;
the terminal assembly comprises a bracket and at least three contact terminals, wherein the at least three contact terminals are respectively installed on two sides of the center line of the top end of the bracket, the contact terminals on two sides are respectively contacted with two opposite side surfaces of the end part of the sensing element to form electric connection, and the sensing element is elastically clamped and installed on the top end of the bracket;
the contact terminals on the two sides of the central line are opposite and staggered with each other.
2. The gas sensor structure of claim 1,
jacks with the same number as the contact terminals are formed in the top end of the support, and the jacks are distributed on two sides of the center line;
the contact terminal comprises an installation part and an elastic part, wherein the elastic part is formed at one end of the installation part and is bent relative to the installation part, the elastic parts of the contact terminal at two sides are opposite and staggered, and the tail end of the elastic part at the same side is flush with the installation part which is close to the opposite side and extends beyond the central line;
the contact terminal is inserted into the insertion hole through the mounting part to be assembled with the bracket into the terminal assembly.
3. The gas sensor structure according to claim 2, wherein the number of contact terminals on both sides of the center line is set to m and n, respectively, and the distance between the tips of the m elastic parts and the center line is set to dmSetting the distance between the tail ends of the n elastic parts and the central line as dn；
When m is equal to n, dmIs equal to dn；
When m is greater than n, dmIs less than dn。
4. The gas sensor structure according to claim 2, wherein the mounting portion includes a main body, a stopper portion, a connecting portion;
the limiting part extends along the width direction of the main body and bends relative to the main body, the bending direction of the limiting part is opposite to that of the elastic part, and the limiting part is positioned at one end of the main body close to the elastic part;
the connecting part extends along the width direction of the main body and is bent relative to the main body, the bending direction of the connecting part is the same as that of the elastic part, and the connecting part is positioned at one end of the main body, which is far away from the elastic part;
the top end of the bracket is also provided with a limiting groove, and the limiting groove is provided with a side wall of the jack;
the limiting part is arranged in the limiting groove to limit the contact terminal;
the installation department inserts behind the jack, connecting portion are located the below of support bottom.
5. The gas sensor structure of claim 4, wherein the receptacles comprise a first receptacle, a second receptacle, a third receptacle, a fourth receptacle, a fifth receptacle;
the first jack and the second jack are positioned on the same side of the center line, the third jack, the fourth jack and the fifth jack are positioned on the other side of the center line, the first jack and the fifth jack are arranged diagonally, and the second jack and the third jack are arranged diagonally;
the contact terminals comprise a first contact terminal, a second contact terminal, a third contact terminal, a fourth contact terminal and a fifth contact terminal;
the body of the first contact terminal is inserted into the first insertion hole, the body of the second contact terminal is inserted into the second insertion hole, the body of the third contact terminal is inserted into the third insertion hole, the body of the fourth contact terminal is inserted into the fourth insertion hole, and the body of the fifth contact terminal is inserted into the fifth insertion hole.
6. The gas sensor structure according to claim 5, wherein one side of the main body of the first contact terminal, the second contact terminal, the third contact terminal, and the fifth contact terminal is provided with a stopper portion, and both sides of the main body of the fourth contact terminal are provided with stopper portions.
7. The gas sensor structure according to claim 5, wherein fastening portions are formed on both sides of the body of the first contact terminal, the second contact terminal, the third contact terminal, and the fifth contact terminal, respectively, and extend in a width direction of the body and are bent with respect to the body, and a bending direction of the fastening portions is the same as a bending direction of the elastic portion;
the side edge of at least one of the fastening parts extends towards the direction far away from the opposite side to form an elastic sheet;
the installation department inserts behind the jack, fastening portion is located in the jack, the flexure strip with the lateral wall of jack forms elastic contact and will installation department fastening installation in the jack.
8. The gas sensor structure according to claim 5, wherein the first contact terminal and the fifth contact terminal are identical in shape, and the second contact terminal and the third contact terminal are identical in shape.
9. The gas sensor structure of claim 1, wherein the support is made of an insulating ceramic material.
10. The gas sensor structure according to claim 1, wherein one end of the sensor element is formed as a detection end, the other end of the sensor element is formed as a signal output end having a first terminal face and a second terminal face which are disposed oppositely, electrode terminals are disposed along a width direction of each of the first terminal face and the second terminal face, the electrode terminals are electrically connected to the contact terminals,
the number of the electrode terminals is the same as the number of the contact terminals;
one end of the electrode terminal located at the end of the signal output terminal is flush.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120558898X | 2021-03-19 | ||
| CN202120558898 | 2021-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215574813U true CN215574813U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121408233.7U Active CN215574813U (en) | 2021-03-19 | 2021-06-24 | Gas sensor structure |
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| Country | Link |
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| CN (1) | CN215574813U (en) |
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2021
- 2021-06-24 CN CN202121408233.7U patent/CN215574813U/en active Active
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