Electrode terminal, terminal assembly, and gas sensing element

Abstract

The application discloses an electrode terminal, a terminal assembly and a gas sensing element, and belongs to the technical field of gas sensors. The application comprises an electrode terminal and a protective piece, the electrode terminal is arranged in the protective piece and is clamped with the protective piece; the electrode terminal comprises a holding part and a contact part which are connected with each other, the holding part is clamped with the protective piece at least along a first direction and a second direction, and the contact part is accommodated in the protective piece; wherein the first direction is the width direction of the electrode terminal, and the second direction is the thickness direction of the electrode terminal. The holding part can realize overall limiting of the electrode terminal along the width direction and the thickness direction, when the electrode terminal is subjected to a pulling force, the pulling force on the whole electrode terminal is uniformly distributed, and the beneficial effect of improving the holding force of the electrode terminal is achieved. Meanwhile, the holding part and the protective piece are clamped along at least two directions, and the beneficial effect of improving the contact stability of the electrode terminal is also achieved.

Description

Technical Field

[0001] This application belongs to the field of gas sensor technology, specifically relating to an electrode terminal, a terminal assembly, and a gas sensing element. Background Technology

[0002] In existing oxygen sensors, the chip electrode pins and electrode connection terminals of the element are connected by contact to transmit signals, and the electrode connection terminals and protective components are snapped together to achieve assembly.

[0003] However, the electrode connection terminal is inserted into the protective member under compressive force, and when subjected to tensile force, it will be pulled out of the protective member, resulting in a defect in the holding force of the electrode connection terminal. Utility Model Content

[0004] The purpose of this application is to provide an electrode terminal, terminal assembly, and gas sensing element that can solve the problems of at least some of the electrode connection terminal holding force defects and insufficient positive force in the contact between the electrode connection terminal and the chip electrode pin.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide an electrode terminal including a retaining portion, the retaining portion including at least a first protruding portion for limiting along a first direction (X) and a second protruding portion for limiting along a second direction (Y); wherein the first direction (X) is the width direction of the electrode terminal and the second direction (Y) is the thickness direction of the electrode terminal.

[0007] In this embodiment, by providing a retaining part, the electrode terminal can be completely limited along the width and thickness directions. When the electrode terminal is subjected to tension, the tensile force on the entire electrode terminal is evenly distributed, thereby effectively improving the retaining force of the electrode terminal.

[0008] Optionally, in an embodiment of this application, the second protruding portion includes a first latching portion and a second latching portion, the first latching portion and the second latching portion are independent of each other, the first latching portion and the second latching portion extend in the second direction (Y), and the extension directions are opposite in the second direction (Y).

[0009] Optionally, in this embodiment of the application, the first protruding portion is disposed at the first end of the first snap-fit ​​portion, and the first end is the end of the first snap-fit ​​portion that is away from the second snap-fit ​​portion along the second direction (Y).

[0010] Optionally, in this embodiment of the application, a first groove is provided on a first side of the first end of the first snap-fit ​​portion, and the first protruding portion is at least partially disposed in the first groove; the first side is the side of the first end that is away from the second snap-fit ​​portion in the second direction (Y).

[0011] Optionally, in this embodiment of the application, the first protruding portion includes a first side and a second side disposed along the third direction (Z); the first side is connected to the first snap-fit ​​portion, and the second side is a free end; wherein, the third direction (Z) is the length direction of the electrode terminal.

[0012] Optionally, in this embodiment of the application, the first protruding portion includes an upper surface and a lower surface disposed opposite to each other along the second direction (Y); the upper surface is away from the second snap-fit ​​portion along the second direction (Y), the lower surface is close to the second snap-fit ​​portion along the second direction (Y), the upper surface is an inclined surface, and the vertex of the inclined surface away from the first side protrudes from the side edge of the first end along the second direction (Y).

[0013] Optionally, in this embodiment of the application, the inclined surface gradually increases in distance from the bottom wall of the first groove from the connection portion of the first side and the first snap-fit ​​portion toward the free end.

[0014] Optionally, in this embodiment of the application, there is a preset interval between the lower surface and the first snap-fit ​​portion; along the third direction (Z), the length of the preset interval is greater than the projection length of the first protruding portion on the body portion.

[0015] Optionally, in this embodiment, the electrode terminal further includes a body portion and a contact portion, one end of the body portion is connected to the holding portion, and the other end of the body portion is connected to the contact portion; along the third direction (Z), the contact portion is bent at an R angle from the end of the body portion away from the holding portion toward the holding portion, and extends toward the holding portion.

[0016] Optionally, in this embodiment of the application, along a third direction (Z), the second snap-fit ​​portion is located between the first snap-fit ​​portion and the body portion.

[0017] Optionally, in this embodiment of the application, the first snap-fit ​​portion and the second snap-fit ​​portion are respectively disposed on both sides of the body portion along the second direction (Y).

[0018] Optionally, in this embodiment, the first snap-fit ​​portion and the contact portion are located on the same side of the body portion along the second direction (Y).

[0019] Optionally, in this embodiment of the application, the number of the first snap-fit ​​portion is at least two, wherein the two first snap-fit ​​portions are arranged opposite each other along the first direction (X).

[0020] Optionally, in an embodiment of this application, the second snap-fit ​​portion includes two curved wings disposed opposite each other along the first direction (X).

[0021] Optionally, in this embodiment, the contact portion includes a first connecting arm, a second connecting arm, and a third connecting arm connected in sequence. The end of the first connecting arm away from the second connecting arm is connected to the body portion; the third connecting arm is close to the holding portion; the distance between the first connecting arm and the body portion gradually increases from the end away from the second connecting arm to the end close to the second connecting arm; the distance between the second connecting arm and the body portion gradually decreases from the end away from the third connecting arm to the end close to the third connecting arm; and the distance between the third connecting arm and the body portion gradually increases from the end away from the holding portion to the end close to the holding portion.

[0022] Optionally, in the embodiments of this application, the contact portion includes a first contact point and a second contact point. The first contact point is the connection point between the first connecting arm and the second connecting arm, and the second contact point is the connection point between the second connecting arm and the third connecting arm. Along the third direction (Z), the first contact point is located on the side of the second contact point away from the body portion.

[0023] Secondly, embodiments of this application also provide a terminal assembly, the terminal assembly including an electrode terminal and a protective member as described above; the electrode terminal passes through the protective member and is snapped into the protective member; the first protruding portion of the retaining portion is snapped into the protective member along a first direction (X), the second protruding portion of the retaining portion is snapped into the protective member along a second direction (Y), and the contact portion of the electrode terminal is accommodated within the protective member.

[0024] Optionally, in this embodiment of the application, the protective member includes a first protective member and a second protective member, the first protective member and the second protective member are arranged sequentially along the third direction (Z), the first extended portion of the retaining part is engaged with the first protective member along the first direction (X), the second extended portion of the retaining part is engaged with the first protective member along the second direction (Y), and the contact portion and the second protective member can abut against each other along the second direction (Y).

[0025] Optionally, in this embodiment of the application, the first protective member has a plurality of first mounting holes, each of the electrode terminals independently corresponds to a plurality of the first mounting holes, the retaining part and part of the body portion of the electrode terminal pass through the first mounting holes, and the retaining part is interference-fitted with the first mounting holes.

[0026] Optionally, in an embodiment of this application, the first assembly hole includes a first hole segment and a second hole segment that are interconnected, the second hole segment being disposed on the side of the first hole segment near the contact portion; the first hole segment and the first snap-fit ​​portion are interference-fitted, and the second hole segment and the second snap-fit ​​portion are snap-fitted.

[0027] Optionally, in this embodiment of the application, the inner wall of the first hole segment is provided with a side wall groove, which is disposed opposite to the first direction (X), and the side wall groove and the first protruding portion are both interference fit along the first direction (X) and the second direction (Y).

[0028] Optionally, in an embodiment of this application, the bottom wall of the second hole segment is provided with a second groove, and the second groove and the second snap-fit ​​part snap-fit ​​together.

[0029] Optionally, in this embodiment, the contact protection member has a plurality of second mounting holes, each of the electrode terminals independently corresponds to a plurality of second mounting holes, the contact portion and a portion of the body portion pass through the second mounting holes, and a portion of the body portion contacts the inner wall of the second mounting holes.

[0030] Optionally, in this embodiment of the application, the terminal assembly further includes a component electrode pin, which is connected to the second protective member; the first contact point of the contact portion contacts the component electrode pin.

[0031] Optionally, in an embodiment of this application, when the second protective member is inserted into the contact portion, the second contact point abuts against the body portion.

[0032] Optionally, in this embodiment of the application, along the second direction (Y), the thickness of the element electrode pin is T, and when the contact portion is in its natural state, the distance between the first contact point and the body portion is B, and the distance between the second contact point and the body portion is A; wherein, (BA) < 1 / 2T.

[0033] Thirdly, this application also provides a gas sensing element, including the terminal assembly as described above. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the terminal assembly in an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the electrode terminals in an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the electrode terminal structure from another angle in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the electrode terminal structure at another angle in an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the electrode terminal structure at another angle in an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of the contact structure between the electronic pins and electrode terminals of the component in an embodiment of this application;

[0040] Figure 7 This is a schematic diagram of the structure of the first protective element in the embodiments of this application;

[0041] Figure 8 This is a schematic diagram of the structure of the first protective component from another angle in an embodiment of this application;

[0042] Figure 9 This is an embodiment of the present application. Figure 7 Schematic diagram of the cross-sectional structure at point MM;

[0043] Figure 10 This is a schematic diagram of the structure of the second protective component in the embodiments of this application;

[0044] Figure 11 This is a schematic cross-sectional view of the connection between the electrode terminal and the first protective element in an embodiment of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Electrode terminal; 11. Holding part; 111. First protruding part; 112. Second protruding part; 1121. First snap-fit ​​part; 1122. Second snap-fit ​​part; 11211. First end; 11212. First groove; 11213. Bottom wall; 11214. First side; 1114. Second side; 1111. Upper surface; 1112. Lower surface; 12. Contact part; 121. First connecting arm; 122. Second connecting arm; 123. Third connecting arm; 124. First contact point; 125. Second contact point; 13. Body part; 20. Protective member; 21. First protective member; 211. First mounting hole; 2111. First hole segment; 2112. Second hole segment; 2113. Side wall groove; 2114. Second groove; 22. Second protective member; 221. Second mounting hole; 30. Component electrode pin; 14. Wire pressing part. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0049] The terminal assembly and gas sensor provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0050] See Figures 1 to 6 This application provides a terminal assembly, including a retaining portion 11. The retaining portion 11 includes at least a first protruding portion 111 for limiting movement along a first direction (X) and a second protruding portion 112 for limiting movement along a second direction (Y). The first direction (X) is the width direction of the electrode terminal 10, and the second direction (Y) is the thickness direction of the electrode terminal 10. In this application embodiment, the electrode terminal 10 can be connected to other components, such as a protective member 20, so that the protective member 20 fixes the electrode terminal 10, preventing loosening or detachment due to vibration, impact, or movement. The electrode terminal 10 includes a retaining portion 11 and a contact portion 12. The retaining portion 11 engages with the protective member 20, and the retaining portion 11 is provided to support the contact portion 12. The engagement with the protective member 20 locks the electrode terminal 10 entirely within the protective member 20. Specifically, the retaining part 11 includes at least a first protruding part 111 for limiting along the first direction (X) and a second protruding part 112 for limiting along the second direction (Y), and the first protruding part 111 and the second protruding part 112 are engaged with the protective member 20 along the width direction and the thickness direction, respectively.

[0051] Understandably, by providing the retaining part 11, the electrode terminal 10 can be completely limited along both the width and thickness directions. When the electrode terminal 10 is subjected to tension, the tensile force on the electrode terminal 10 is evenly distributed, which has the beneficial effect of improving the retaining force of the electrode terminal 10. At the same time, the retaining part 11 and the protective member 20 are engaged in at least two directions, so that the contact between the electrode connection terminal and the chip electrode pin can receive more consistent compression, and the positive force at the contact part of the electrode connection terminal is more sufficient, which has the beneficial effect of improving the contact stability of the electrode terminal 10.

[0052] Optionally, see Figures 1 to 6 In this embodiment of the application, the second protruding portion 112 includes a first snap-fit ​​portion 1121 and a second snap-fit ​​portion 1122. The first snap-fit ​​portion 1121 and the second snap-fit ​​portion 1122 are independent of each other. The first snap-fit ​​portion 1121 and the second snap-fit ​​portion 1122 extend in the second direction (Y) and the extension directions are opposite in the second direction (Y).

[0053] In this embodiment, a first latching portion 1121 and a second latching portion 1122, which are independent of each other, are provided in the opposite direction to the second direction (Y) to limit the electrode terminal 10 in the two opposite directions of the second direction (Y). The first latching portion 1121 and the second latching portion 1122 can be integrally formed during the preparation of the electrode terminal 10, and the specific preparation method is not limited in this embodiment.

[0054] In some embodiments, the first latching portion 1121 and the second latching portion 1122 can be rectangular plates. The first latching portion 1121 and the second latching portion 1122 are arranged opposite to each other along a first direction (X) and extend in two opposite directions along a second direction (Y) so as to limit the electrode terminal 10 in two opposite directions along the second direction (Y) after the electrode terminal 10 is installed.

[0055] In other embodiments, the first latching portion 1121 and the second latching portion 1122 may be irregularly shaped to cooperate with external latching components (such as the protective member 20). The first latching portion 1121 and the second latching portion 1122 may be disposed on the same side of the electrode terminal 10 along the first direction (X), or they may be disposed on opposite sides of the electrode terminal 10 along the first direction (X) and extend in two opposite directions along the second direction (Y) to limit the electrode terminal 10 in two opposite directions along the second direction (Y).

[0056] It is understandable that by setting the first latching part 1121 and the second latching part 1122, and by making them independent of each other and extending in opposite directions in the second direction (Y), the electrode terminals can be limited from two opposite directions. When they are latched together with other components (such as the protective member 20), they can provide a more stable fixing effect in the second direction, preventing the electrode terminals from shifting or loosening in the thickness direction and ensuring their positional accuracy during use.

[0057] Optionally, see Figures 1 to 6 In this embodiment of the application, the first protruding portion 111 is disposed at the first end 11211 of the first snap-fit ​​portion 1121, and the first end 11211 is the end of the first snap-fit ​​portion 1121 that is away from the second snap-fit ​​portion 1122 along the second direction (Y).

[0058] Specifically, the first latching portion 1121 extends along the second direction (Y), and the end of it away from the second latching portion 1122 is the first end 11211, and the first protruding portion 111 is disposed on the first end 11211. The first protruding portion 111 and the first latching portion 1121 can be integrally formed during manufacturing, or assembled after stamping. The specific manufacturing method is not limited in the embodiments of this application.

[0059] In some embodiments, the first snap-fit ​​portion 1121 is rectangular, and the first protruding portion 111 is disposed on the side of the first snap-fit ​​portion 1121 away from the second snap-fit ​​portion 1122 along the second direction (Y) and extends along the first direction (X). The first snap-fit ​​portion 1121 and the first protruding portion 111 are integrally formed.

[0060] Understandably, by positioning the first protruding portion 111 at the first end 11211 of the first latching portion 1121, away from the second latching portion 1122 along the second direction (Y), the first protruding portion 111 can engage and limit the electrode terminal with other components in the first direction (X), preventing displacement of the electrode terminal in the width direction. Simultaneously, because it is positioned at the end of the first latching portion 1121, in conjunction with the limiting function of the first latching portion 1121 and the second latching portion 1122 in the second direction (Y), the electrode terminal can achieve more stable limiting in two mutually perpendicular directions, greatly improving the stability of the electrode terminal after installation. Furthermore, the first protruding portion 111, positioned at this end, does not affect the limiting function of the first latching portion 1121 and the second latching portion 1122 in the second direction (Y), while simultaneously providing limiting functionality in the first direction (X). This fully utilizes space, optimizes the overall structure of the electrode terminal, and facilitates miniaturization and integration of the product design.

[0061] Optionally, see Figures 1 to 6In this embodiment, the first end 11211 of the first latching portion 1121 has a first groove 11212 on its first side, and the first protruding portion 111 is at least partially disposed in the first groove 11212. The first side is the side of the first end 11211 that is away from the second latching portion 1122 in the second direction (Y). Specifically, the first end of the first latching portion 1121 has a first groove 11212 on its first side, and at least part of the first protruding portion 111 is disposed in the first groove 11212. The first side is the side of the first end 11211 that is away from the second latching portion 1122 in the second direction (Y). In some embodiments, at least part of the first protruding portion 111 is parallel to the side of the first end 1121 of the first latching portion 1121 along the second direction (Y), and the other part of the first protruding portion 111 is bent away from the body portion (13) along the first direction (X). When it engages with a snap-fit ​​component (such as the protective component 20), it provides a limiting function along the first direction (X).

[0062] Understandably, the first end 11211 of the first latching portion 1121 has a first groove 11212 on its side along the second direction (Y), and the first protruding portion 111 is at least partially disposed in the first groove 11212, making the connection between the first protruding portion 111 and the first latching portion 1121 more stable. When subjected to external force, it can better disperse stress and reduce the risk of structural damage due to stress concentration. At the same time, the first groove makes the overall structure of the electrode terminal 10 more compact. Within a limited space, it achieves the limiting function of the first protruding portion 111 along the first direction (X) without occupying too much additional space, which is conducive to the miniaturization design of the product and meets some application scenarios with strict space requirements.

[0063] Optionally, see Figures 1 to 6 In this embodiment, the first protruding portion 111 includes a first side 1113 and a second side 1114 disposed along a third direction (Z); the first side 1113 is connected to the first snap-fit ​​portion 1121, and the second side 1114 is a free end; wherein, the third direction (Z) is the length direction of the electrode terminal 10. Specifically, one end of the first side 1113 of the first protruding portion 111 is connected to the first snap-fit ​​portion 1121, and the other end of the first side 1113 is connected to one end of the second side 1114, and the other end of the second side 1114 is a free end. In some embodiments, one end of the first side 1113 is connected to the first snap-fit ​​portion 1121 and is disposed parallel to the side of the first snap-fit ​​portion 1121 along a second direction (Y), and the other end of the first side 1113 is connected to one end of the second side 1114. The second side 1114 bends away from the body portion 13 along a first direction (X) and protrudes from the side of the body portion to realize the limiting function of the first protruding portion 111 along the first direction (X).

[0064] Understandably, the first protruding portion 111 is configured with a first side 1113 and a second side 1114 along a third direction (Z), with one end of the second side 1114 being a free end. The free end of the second side 1114 allows the electrode terminal to flexibly cooperate with other components along its length, without affecting the overall compactness of the layout due to unnecessary structural obstructions, and better adapts to the limited installation space inside different devices. For example, when the electrode terminal 10 is engaged with the protective member 20, the electrode terminal on the second side 1114 is inserted into the protective member 20 and engaged with it. Simultaneously, the first side 1113 connects to the first engaging portion 1121, providing a stable support base for the first protruding portion 111. This allows it to effectively transfer force to the first engaging portion 1121 when subjected to external forces along the first direction (X) or other directions, thereby distributing the force across the entire electrode terminal structure and enhancing the overall resistance of the electrode terminal to external forces. Furthermore, since the second side 1114 is a free end, it is easier to assemble when the electrode terminal (10) is snapped into the protective member 20.

[0065] Optionally, see Figures 1 to 6 In this embodiment of the application, the first protruding portion 111 includes an upper surface 1111 and a lower surface 1112 disposed opposite to each other along the second direction (Y); the upper surface 1111 is away from the second latching portion 1122 along the second direction (Y), and the lower surface 1122 is close to the second latching portion 1122 along the second direction (Y). The upper surface 1111 is an inclined surface, and the apex of the inclined surface away from the first side 1113 protrudes from the side of the first end 11211 along the second direction (Y).

[0066] Specifically, in some embodiments, the upper surface 1111 of the first protruding portion 111 extends away from the second engaging portion 1122 along the second direction (Y). The upper surface 111 is a slope that slopes from the end connected to the first engaging portion 1121 towards the second engaging portion 1122 along the second direction (Y), and the apex of the slope of the upper surface 1111 protrudes from the side of the first end 11211 along the second direction (Y). The lower surface 1112 extends towards the second engaging portion 1122 along the second direction (Y). It can be understood that the upper surface 1111 extends away from the bottom wall 11213 of the first groove 11212 along the second direction (Y), and the lower surface 1112 extends towards the bottom wall 11213 of the first groove 11212 along the second direction (Y). In some embodiments, the lower surface 1112 is a plane parallel to the body portion 13.

[0067] Understandably, the upper surface 1111 of the first protruding portion 111 is set as an inclined surface with its vertex protruding from the side of the first end 11211 along the second direction (Y). This allows the inclined structure of the upper surface 1111 to provide good guidance when assembling the electrode terminal with other components, making the assembly process smoother, reducing the risk of component damage due to assembly difficulties, and improving assembly efficiency. At the same time, the vertex protruding from the side can form a tighter engagement or fit with the corresponding component, enhancing the limiting effect of the electrode terminal in the second direction (Y), effectively preventing displacement of the electrode terminal in this direction, and improving the overall connection stability.

[0068] In the embodiments of this application, see Figures 1 to 6 The inclined surface gradually increases in distance from the bottom wall 11213 of the first groove 11212 towards the free end from the connection part of the first side (1113) and the first snap-fit ​​part (1121).

[0069] Specifically, the inclined surface gradually increases in distance from the bottom wall 11213 of the first groove 11212 from the connection point of the first side (1113) and the first latching part (1121) toward the free end. That is, the end of the upper surface 1111 of the first protruding part 111 away from the contact part 12 is connected to the first side 1113, and the inclined surface slopes from the end connected to the first latching part 1121 toward the direction away from the second latching part 1122 along the second direction (Y), so that the apex of the inclined surface near the second latching part 1122 along the third direction (Z) is higher in the second direction (Y) than the apex away from the second latching part 1122 along the third direction (Z).

[0070] Understandably, the slope gradually decreases in distance from the bottom wall 11213 of the first groove 11212 from the end near the second latching portion to the end away from the second latching portion. When subjected to external force along the second direction (Y) or other directions, it can promote the formation of a cooperative force-bearing mechanism between the first protruding portion 111, the first latching portion 1121, and the second latching portion 1122, avoiding stress concentration in a local area. This greatly improves the structural strength and stability of the electrode terminal, enabling it to adapt to more complex and harsh working environments. Simultaneously, this structure optimizes the internal space utilization of the electrode terminal, making the layout of each component more compact and rational, which is conducive to the miniaturization and integration of the product structure. Optionally, see... Figures 1 to 6 There is a preset interval between the lower surface 1112 and the first snap-fit ​​portion 1121; along the third direction (Z), the length of the preset interval is greater than the projection length of the first protruding portion 111 on the body portion 13.

[0071] Specifically, there is a preset interval between the lower surface 1112 and the end of the first latching portion 1121 near the lower surface 1112 along the second direction (Y). The specific value of the preset interval can be designed according to the size of the external latching member (such as the protective member 20), and this embodiment does not limit it. The length of the preset interval is greater than the projected length of the first protruding portion 111 on the body portion 13, so that when the first protruding portion 111 is subjected to pressure from the external latching member along the first direction (X) towards the body portion 13, it can move along the first direction (X) towards the body portion 13 and be accommodated in the preset interval.

[0072] Understandably, a predetermined gap exists between the lower surface 1112 and the first latching portion 1121, allowing the first protruding portion 111 to be accommodated within this predetermined gap when subjected to pressure from an external latching member along the first direction (X) towards the body portion 13. Furthermore, when the electrode terminal 10 is subjected to external forces such as vibration or impact, the air within the gap or the filling cushioning material (if present) can absorb some energy, reducing the impact of stress on the connection between the first latching portion 1121 and the lower surface 1112, thereby improving the structural stability of the electrode terminal and extending its service life. Simultaneously, the presence of the gap increases airflow space, which is beneficial for heat dissipation generated by the electrode terminal 10 during operation, preventing performance degradation due to heat accumulation, and ensuring stable operation of the electrode terminal 10 in high-temperature environments.

[0073] Optionally, see Figures 1 to 6 In this embodiment of the application, the electrode terminal 10 further includes a body portion 13 and a contact portion 12. One end of the body portion 13 is connected to the holding portion 11, and the other end of the body portion 13 is connected to the contact portion 12. Along the third direction (Z), the contact portion 12 is bent from the end of the body portion 13 away from the holding portion 11 toward the holding portion 11 to form an R angle, and extends toward the holding portion 11. The third direction (Z) is the length direction of the electrode terminal 10.

[0074] Specifically, the body portion 13 can be a cuboid, with one end connected to the end of the retaining portion 11 near the second snap-fit ​​portion 1122, and the other end of the body portion 13 connected to the contact portion 12. The contact portion 12, from its connection point with the body portion 13, bends in a third direction (Z) towards the retaining portion 11 to form an R-angle, and extends towards the retaining portion 11. The body portion 13, the contact portion 12, and the retaining portion 11 can be integrally formed during manufacturing, or stamped by a stamping process. This application embodiment does not limit this.

[0075] Understandably, the design of the contact portion 12 bending towards the retaining portion 11 to form an R-angle and extending it avoids stress concentration. When the electrode terminal 10 is subjected to external pulling, vibration, or stress generated by thermal expansion and contraction, the R-angle can evenly distribute the stress to various parts of the body portion 13 and the contact portion 12, greatly improving the structural strength and fatigue resistance of the electrode terminal and extending its service life. In addition, from the perspective of assembly convenience, this bent and extended structure of the contact portion 12 makes it easier to align and connect the electrode terminal when assembling with other components. Operators can more easily install it in a specific position, improving assembly efficiency, reducing the probability of assembly errors, and facilitating large-scale production and application.

[0076] Optionally, see Figures 1 to 6 In this embodiment of the application, along the third direction (Z), the second snap-fit ​​portion 1122 is located between the first snap-fit ​​portion 1121 and the main body portion 13.

[0077] Specifically, in the third direction (Z), the second latching portion 1122 is located between the first latching portion 1121 and the body portion 13, so that the electrode terminal can more effectively disperse stress when subjected to external forces. When the electrode terminal 10 is subjected to external forces such as pulling, squeezing or vibration from different directions, a structural system of cooperative force-bearing is formed between the first latching portion 1121, the second latching portion 1122 and the body portion 13. The second latching portion 1122 is in the middle position, which can balance the stress from the first latching portion 1121 and the body portion 13, and avoid stress concentration at a certain connection part, thereby greatly improving the overall structural strength and fatigue resistance of the electrode terminal and extending its service life.

[0078] Optionally, see Figures 1 to 6 In this embodiment of the application, the first snap-fit ​​portion 1121 and the second snap-fit ​​portion 1122 are respectively disposed on both sides of the body portion 13 along the second direction (Y).

[0079] Specifically, the first latching portion 1121 and the second latching portion 1122 are respectively disposed on both sides of the body portion 13 along the second direction (Y) and extend in the opposite direction of the second direction (Y), providing symmetrical limiting for the body portion 13 in the second direction (Y), so that the electrode terminal 10 can achieve bidirectional stable force when subjected to external force. When the electrode terminal is subjected to external forces such as pulling or squeezing along the second direction (Y), the first latching portion 1121 and the second latching portion 1122 located on both sides of the body portion 13 can simultaneously share the external force, avoiding structural deformation or damage caused by unilateral force, and greatly improving the structural strength and stability of the electrode terminal. At the same time, this symmetrically distributed latching portion design makes the structure of the electrode terminal 10 more compact and reasonable, giving full play to the latching function in a limited space, which is conducive to realizing the miniaturization and integration design of the equipment, and meeting the requirements of communication base station equipment and other equipment for small component space occupation and high performance requirements.

[0080] Optionally, see Figures 1 to 6 In this embodiment of the application, the first snap-fit ​​portion 1121 and the contact portion 12 are located on the same side of the body portion 13 along the second direction (Y).

[0081] Specifically, the first latching portion 1121 and the contact portion 12 are located on the same side of the body portion 13 along the second direction (Y). Since the first protruding portion 111 is connected to the first latching portion 1121, the first protruding portion, the first latching portion 1121 and the contact portion 12 are all located on the same side of the body portion 13 along the second direction (Y).

[0082] Understandably, the first latching portion 1121 and the contact portion 12 are located on the same side of the body portion 13 along the second direction (Y), so that the first protruding portion 111 is also located on the same side. This arrangement enhances the structural stability of the electrode terminal. When the electrode terminal is subjected to external forces, such as vibration, impact, or pulling, the first latching portion 1121, the contact portion 12, and the first protruding portion 111 can work together with the body portion 13 to resist the external forces, ensuring the stability of the contact portion 12, avoiding structural deformation or damage caused by uneven force, enhancing the resistance of the electrode terminal 10 to external forces, and extending its service life.

[0083] Optionally, see Figures 1 to 6 In this embodiment of the application, the number of first latching portions 1121 is at least two, wherein the two first latching portions 111 are arranged opposite each other along a first direction (X).

[0084] Specifically, the number of first latching portions 1121 is at least two, with two first latching portions 1121 disposed opposite each other on both sides of the body portion 13 along the first direction (X). In some embodiments, there are two first latching portions 1121 disposed opposite each other on the body portion 13 along the first direction (X). In other embodiments, there are four first latching portions 1121 disposed opposite each other in pairs along the first direction (X). Among them, two first latching portions 1121 are located on the same side of the body portion 13 along the third direction (Z); the other two first latching portions 1121 are located on the other side of the body portion 13 along the first direction (X), and are opposite each other in pairs with the first latching portions 1121 on the opposite side.

[0085] Understandably, multiple first engaging portions 1121 can greatly enhance the engagement stability between the electrode terminals and related components such as protective devices. Compared to the case with only a single first engaging portion 1121, multiple first engaging portions 1121 can effectively distribute the force borne during engagement, significantly reducing the risk of engagement failure due to excessive local force, thereby significantly improving the reliability of the entire terminal assembly. At the same time, two first engaging portions 1121 arranged opposite each other along the first direction (X) can form a symmetrical limiting structure, precisely constraining the position of the electrode terminals in the first direction (X), ensuring that the electrode terminals will not shift in this direction during assembly and subsequent actual use, thus ensuring the accuracy of the engagement between the electrode terminals and other components, and providing strong support for improving the performance stability and consistency of the entire gas sensing element.

[0086] Optionally, see Figures 1 to 6 In this embodiment of the application, the second snap-fit ​​portion 1122 includes two curved wings 11221 disposed opposite to each other along the first direction (X).

[0087] Specifically, two curved wings 11221 are arranged opposite each other along the first direction (X), and are bent by the second snap-fit ​​portion 1122 along both sides of the first direction (X) in two directions opposite to the first direction (X) to limit the electrode terminal 10 along the second direction (Y). The curved wings can be integrally formed when the second snap-fit ​​portion 1122 is installed, and this application embodiment does not limit it.

[0088] Understandably, by providing two opposing curved wings along the first direction (X), a more stable and reliable snap-fit ​​structure can be provided when the electrode terminal 10 is engaged with other components (such as the protective element 20). This opposing arrangement effectively limits the electrode terminal 10 from the first direction (X), enhancing its fixation in that direction and preventing displacement or loosening. Simultaneously, the presence of the two curved wings 1122 increases the contact area of ​​the snap-fit, thereby improving its firmness. This allows the entire electrode terminal 10 to better maintain structural stability during actual use, ensuring the reliability of the electrical connection and the stability of equipment operation, reducing the risk of failure due to unstable connection, and improving the overall performance and service life of the product.

[0089] Optionally, see Figures 1 to 6 In this embodiment, the contact portion 12 includes a first connecting arm 121, a second connecting arm 122, and a third connecting arm 123 connected in sequence. The end of the first connecting arm 121 away from the second connecting arm 122 is connected to the body portion 13. The third connecting arm 123 is close to the holding portion 11. The distance between the first connecting arm 121 and the body portion 13 gradually increases from the end away from the second connecting arm 122 to the end close to the second connecting arm 122. The distance between the second connecting arm 122 and the body portion 13 gradually decreases from the end away from the third connecting arm 123 to the end close to the third connecting arm 123. The distance between the third connecting arm 123 and the body portion 13 gradually increases from the end away from the holding portion 11 to the end close to the holding portion 11.

[0090] Specifically, one end of the first connecting arm 121 is connected to the main body 13, and the other end is connected to the second connecting arm 122. One end of the second connecting arm 122 is connected to the first connecting arm 121, and the other end is connected to the third connecting arm 123. The end of the third connecting arm 123 near the holding part 11 is suspended. The first connecting arm 121, the second connecting arm 122, and the third connecting arm 123 all extend from the connection point between the first connecting arm 121 and the main body 13 in a third direction (Z) towards the holding part 11. Specifically, the distance between the first connecting arm 121 and the main body 13 gradually increases from the end furthest from the second connecting arm 122 to the end closest to the second connecting arm 122. The distance between the second connecting arm 122 and the main body 13 gradually decreases from the end furthest from the third connecting arm 123 to the end closest to the third connecting arm 123. The distance between the third connecting arm 123 and the main body 13 gradually increases from the end furthest from the holding part 11 to the end closest to the holding part 11. Furthermore, the connection points of the first connecting arm 121, the second connecting arm 122, the third connecting arm 123, and the main body 13 are all smooth arcs, making the contact portion 12 composed of the first connecting arm 121, the second connecting arm 122, and the third connecting arm 123 a wave shape extending from the end of the main body 13 away from the holding portion 11 along a third direction (X) towards the holding portion 11.

[0091] Understandably, the connection method of the first connecting arm 121, the second connecting arm 122, and the third connecting arm 123 enables the contact portion 12 to provide a more stable and reliable electrical connection when it contacts the component electrode pin 30. The design of the first connecting arm 121, with its gradually increasing distance from the body portion 13, can accommodate positional deviations when the component electrode pin 30 is inserted, providing a certain guiding effect. The design of the second connecting arm 122, with its gradually decreasing distance from the body portion 13, enhances the clamping force on the component electrode pin 30, ensuring a tight contact. The design of the third connecting arm 123, with its gradually increasing distance from the body portion 13, helps reduce damage to the electrode terminal 10 when the component electrode pin 30 is pulled out, and also facilitates subsequent maintenance and replacement operations. In addition, this structural design can also disperse the stress generated during contact, reducing the risk of damage to the electrode terminal 10 caused by local stress concentration, and improving the service life of the electrode terminal 10 and the reliability of the entire terminal assembly.

[0092] Optionally, see Figures 1 to 6 In this embodiment of the application, the contact portion 12 includes a first contact point 124 and a second contact point 125. The first contact point 124 is the connection point of the first connecting arm 121 and the second connecting arm 122, and the second contact point 125 is the connection point of the second connecting arm 122 and the third connecting arm 123. Along the third direction (Z), the first contact point 124 is located on the side of the second contact point 125 away from the body portion 13.

[0093] Specifically, the distance between the first connecting arm 121 and the body portion 13 gradually increases from the end furthest from the second connecting arm 122 to the end closest to the second connecting arm 122. The distance between the second connecting arm 122 and the body portion 13 gradually decreases from the end furthest from the third connecting arm 123 to the end closest to the third connecting arm 123. The distance between the third connecting arm 123 and the body portion 13 gradually increases from the end furthest from the holding portion 11 to the end closest to the holding portion 11. The first contact point 124 is the connection point between the first connecting arm 121 and the second connecting arm 122, and the second contact point 125 is the connection point between the second connecting arm 122 and the third connecting arm 123. That is, the first contact point 124 is the highest point of the contact portion 12 along the second direction (Y), and the second contact point 125 is lower than the first contact point 124.

[0094] Understandably, the dual-contact structure significantly improves the mechanical stability of the contact portion 12 when it connects with external components (such as component electrode pins 30). When the component electrode pins 30 are connected to the contact portion 12, the two contact points can apply support forces from different positions, effectively avoiding the shaking or displacement that may be caused by single-point contact, and ensuring that the connection remains stable under mechanical stress. Furthermore, because the two contact points are located at different positions, they can each bear part of the impact force when subjected to external mechanical impact, preventing stress concentration at a single point, greatly reducing the probability of deformation or damage to the contact points due to excessive force, thereby significantly extending the mechanical service life of the electrode terminal 10.

[0095] Furthermore, such as Figure 3 As shown, the electrode terminal 10 also includes a wire clamping portion 14, which is connected to the end of the body portion 13 away from the contact portion 12 and is on the same side as the first snap-fit ​​portion 1121. The wire clamping portion 14 includes two first side wings, which are symmetrically arranged on both sides of the body portion 13 along a first direction (X). The cable is placed in the two first side wings of the wire clamping portion 13, so that the electrode terminal (10) and the cable clamping portion (14) are crimped and fixed.

[0096] Secondly, this application also provides a terminal assembly, which includes an electrode terminal 10 and a protective member 20 as described above. The electrode terminal 10 passes through the protective member 20 and is snapped into the protective member 20. The first protruding portion 111 of the retaining portion 11 is snapped into the protective member 20 along a first direction (X), and the second protruding portion 112 of the retaining portion 11 is snapped into the protective member 20 along a second direction (Y). The contact portion 12 of the electrode terminal 10 is accommodated within the protective member 20.

[0097] Specifically, the electrode terminal 10 passes through one end of the contact portion 12 into the protective member 20 and is engaged with the protective member 20 by a retaining portion. The first protruding portion 111 of the retaining portion 11 engages with the protective member 20 along a first direction (X) to limit the electrode terminal 10 in the first direction (X). The second protruding portion 112 of the retaining portion 11 engages with the protective member 20 along a second direction (Y) to limit the electrode terminal 10 in the second direction (Y). This ensures that the electrode terminal 10 is accommodated within the protective member 20 and securely engaged with it.

[0098] Understandably, the electrode terminal 10 passes through the protective member 20 and is engaged with the protective member 20 along the first direction (X) and the second direction (Y) respectively through the first protruding portion 111 and the second protruding portion 112 of the retaining portion 11. This effectively limits the electrode terminal 10 in two mutually perpendicular directions. This multi-directional limiting method can greatly enhance the stability of the electrode terminal 10 within the protective member 20, preventing it from displacing or shaking under the action of external forces such as mechanical vibration and impact, and ensuring the reliable fixation of the electrode terminal 10 in the mechanical structure.

[0099] Optionally, in this embodiment of the application, the protective member 20 includes a first protective member 21 and a second protective member 22. The first protective member 21 and the second protective member 22 are arranged sequentially along a third direction (Z). The first extended portion 111 of the retaining portion 11 is engaged with the first protective member 21 along a first direction (X), and the second extended portion 112 of the retaining portion 11 is engaged with the first protective member 21 along a second direction (Y). The contact portion 12 and the second protective member 22 can abut against each other along the second direction (Y).

[0100] Specifically, the protective member 20 includes a first protective member 20 and a second protective member 22, and the first protective member 21 and the second protective member 22 are arranged sequentially along a third direction (Z). When the electrode terminal 10 passes through the protective member 20, the first protruding portion 111 of the retaining portion 11 engages with the first protective member 21 along the first direction (X) to provide a limit for the electrode terminal along the first direction (X). The second protruding portion 112 of the retaining portion 11 engages with the first protective member 21 along the second direction (Y) to provide a limit for the electrode terminal along the second direction (Y). At the same time, the contact portion 12 and the second protective member 22 abut against each other along the second direction (Y).

[0101] Understandably, the protective member 20 adopts a structure in which the first protective member 21 and the second protective member 22 are arranged sequentially along a third direction (Z). The first protruding portion 111 of the retaining part 11 engages with the first protective member 21 along the first direction (X), and the second protruding portion 112 engages with the first protective member 21 along the second direction (Y). This multi-directional engagement method provides a stable mechanical fixing foundation for the electrode terminal 10. When faced with external forces such as mechanical vibration and impact, the first protective member 21 can effectively limit the displacement of the electrode terminal 10 in the X and Y directions, ensuring its positional stability and avoiding electrical connection instability or component damage caused by shaking. The contact part 12 and the second protective member 22 can abut against each other along the second direction (Y), which further enhances the mechanical protection of the electrode terminal 10. The second protective member 22 can not only provide additional support for the contact part 12 in the Y direction to prevent the contact part 12 from deforming due to force, but also block the direct collision of external objects with the contact part 12, reducing the risk of mechanical damage. In addition, this dual-protection structure offers convenience in mechanical assembly. The two protective components can be installed and adjusted separately, improving assembly accuracy and efficiency, reducing errors during the assembly process, thereby enhancing the mechanical performance and reliability of the entire terminal assembly and ensuring stable operation of the product under complex mechanical conditions.

[0102] Optionally, in this embodiment of the application, the first protective member 21 has a plurality of first mounting holes 211, and each electrode terminal 10 independently corresponds to a plurality of first mounting holes (211). The retaining part 11 and part of the body part 13 pass through the first mounting holes 211, and the retaining part 11 is interference-fitted with the first mounting holes 211.

[0103] Specifically, the first protective member 21 has a plurality of first mounting holes 211, and the electrode terminals 10 correspond one-to-one with the first mounting holes 211, so that the holding part 11 of the electrode terminal 10 and part of the body part of the electrode terminal 10 pass through the first mounting hole 211, and the holding part 11 is interference-fitted with the first mounting hole 211, so that the electrode terminal 10 can be securely locked in the first mounting hole 211.

[0104] Understandably, the first protective component 21 has multiple first mounting holes 211, with each electrode terminal 10 independently corresponding to one of the first mounting holes 211. The retaining part 11 and part of the body part 13 pass through these holes, and the retaining part 11 is interference-fitted with the first mounting holes 211. The multiple first mounting holes 211 enable the orderly installation of multiple electrode terminals 10, greatly improving assembly efficiency and facilitating mass production. The interference fit ensures a tight connection between the retaining part 11 and the first mounting holes 211. During equipment operation, even under strong vibration or complex external forces, the electrode terminals 10 are unlikely to shift, ensuring the robust connection between the electrode terminals 10 and the first protective component 21, thereby guaranteeing the stability of the entire electrical connection system. Simultaneously, this tight fit reduces friction and noise caused by loose components, extending the equipment's service life. Furthermore, the first assembly hole 211 includes a first hole segment 2111 and a second hole segment 2112 that are interconnected. The second hole segment 2112 is disposed on the side of the first hole segment 2111 near the contact portion 12. The first hole segment 2111 and the first snap-fit ​​portion 111 are interference-fitted, and the second hole segment 2112 and the second snap-fit ​​portion 112 are snap-fitted together.

[0105] In this embodiment, the first mounting hole 211 provides a fixed connection space and a snap-fit ​​position for the electrode terminal 10. In practical applications, the first mounting holes 211 and the electrode terminals 10 are arranged in a one-to-one correspondence, with one electrode terminal 10 inserted into each first mounting hole 211. The retaining part 11 and a portion of the body part 13 pass through the first mounting hole 211, and the retaining part 11 and the first mounting hole 211 are press-fitted to ensure stable contact of the electrode terminals 10.

[0106] Understandably, the first mounting hole 211 is designed to include a first hole segment 2111 and a second hole segment 2112 that are interconnected, with the second hole segment 2112 located on the side of the first hole segment 2111 closer to the contact portion 12. Simultaneously, the first hole segment 2111 is press-fitted with the first snap-fit ​​portion 111, and the second hole segment 2112 snaps into the second snap-fit ​​portion 112. This arrangement, where different hole segments engage with their corresponding snap-fit ​​portions, achieves a more precise and stable connection. The press-fit of the first hole segment 2111 effectively prevents the first snap-fit ​​portion 111 from loosening or shifting after assembly, providing a solid initial fixing foundation for the electrode terminal 10. The snap-fit ​​between the second hole segment 2112 and the second snap-fit ​​portion 112 further limits the electrode terminal 10 from the direction closer to the contact portion 12, enhancing the stability of the overall structure on that side. This segmented mating structure allows each hole segment and the snap-fit ​​part to work together when the electrode terminal 10 is subjected to external forces in multiple directions, effectively dispersing stress and reducing the risk of connection failure due to excessive local stress. This greatly improves the reliability of the connection between the electrode terminal 10 and the first protective component 21, thereby ensuring the stable operation of the entire electrical connection system under complex working conditions and extending the reliable working time of the equipment.

[0107] Optionally, in this embodiment of the application, the inner wall of the first hole segment 2111 is provided with a side wall groove 2113, which is provided opposite to the first direction X. The side wall groove 2113 and the first protruding portion (111) are both interference fit along the first direction X and the second direction Y.

[0108] In this embodiment, the height of the right side of the upper surface 11121 of the side wing is slightly greater than the height of the sidewall groove 2113. Therefore, the side wing and the sidewall groove 2113 are interference-fitted along the second direction Y. The side wing protrudes from the body along the first direction X, and the groove depth of the sidewall groove 2113 along the first direction X is slightly smaller than the distance by which the side wing protrudes from the body. Therefore, the sidewall and the sidewall groove 2113 are interference-fitted along the first direction X. In this embodiment, the mutual compression of the sidewall groove 2113 and the side wing has the beneficial effect of improving the connection stability between the electrode terminal 10 and the first protective member 21.

[0109] It should be noted that along the first direction X, the side wing and the first hole segment 2111 are interference-fitted, and the electrode terminal 10 is not easy to rotate due to the pressure of the inner wall of the first hole segment 2111.

[0110] Furthermore, the bottom wall of the second hole section 2112 is provided with a second groove 2114 along the negative direction of the second direction Y, and the second groove 2114 and the second snap-fit ​​part 112 snap-fit ​​together.

[0111] In this embodiment of the application, the second groove 2114 is provided for cooperating with the second snap-fit ​​part 112. Through the cooperation of the second groove 2114 and the second snap-fit ​​part 112, when the electrode terminal 10 is subjected to tension, the second snap-fit ​​part 112 can share the force with the first snap-fit ​​part 111, and the overall tensile force of the electrode terminal 10 is evenly distributed, so as to improve the holding force of the electrode terminal 10.

[0112] Understandably, the bottom wall of the second hole section 2112 has a second groove 2114 formed along the negative direction of the second direction Y and engages with the second snap-fit ​​part 112, adding an additional positioning point for the electrode terminal 10 in the negative Y direction, which can effectively suppress the displacement tendency of the electrode terminal 10 in this direction. During equipment operation, if subjected to an external force impact along the Y direction, the second groove 2114 can, with its special structure, disperse the force to a larger area, preventing local stress concentration from damaging the second snap-fit ​​part 112 or the first protective member 21. At the same time, this snap-fit ​​engagement enhances the stability of the electrode terminal 10 within the first mounting hole 211, ensuring that the entire connection structure maintains a reliable connection under multi-directional external forces, further guaranteeing the stability of the electrical connection system, reducing electrical faults caused by component loosening, and extending the fault-free operation time of the equipment under complex working conditions.

[0113] Optionally, in this embodiment, the contact protection member 20 has a plurality of second mounting holes 221, each of the electrode terminals (10) is independently corresponding to the second mounting hole 221, the contact portion 12 and part of the body portion 13 pass through the second mounting hole 221, and part of the body portion 13 contacts the inner wall of the second mounting hole 221.

[0114] In this embodiment, the second mounting hole 221 provides mounting space for the contact portion 12 and part of the body. In practical applications, the second mounting hole 221 and the electrode terminal 10 are arranged in a one-to-one correspondence, and one electrode terminal 10 is inserted into each of the first mounting holes 211. The contact portion 12 and part of the body portion 13 pass through the second mounting hole 221. In practical applications, when the component electrode lead 30 is inserted into the contact protector 20, the component electrode lead 30 presses the contact portion 12 along the second direction Y. At this time, the contact portion 12 is forced to move towards the body portion 13 and abuts against the body portion 13.

[0115] Understandably, the protective component 20 has multiple second mounting holes 221, with each electrode terminal 10 independently corresponding to one of the second mounting holes 221. The contact portion 12 and a portion of the body portion 13 pass through these holes, with a portion of the body portion 13 contacting the inner wall of the second mounting hole 221. This allows for the simultaneous assembly of multiple electrode terminals 10, significantly improving assembly efficiency and meeting the needs of large-scale production. Furthermore, the independent design allows for the separate installation and debugging of each electrode terminal 10. During later maintenance, if a faulty electrode terminal 10 occurs, there is no need for a large-scale disassembly of the entire system; only the connection of the faulty electrode terminal 10 within the second mounting hole 221 needs to be inspected or replaced. This significantly reduces maintenance costs and time, enhances product maintainability, and effectively improves the overall performance and reliability of the product.

[0116] Optionally, in this embodiment, the terminal assembly further includes a component electrode pin 30, which is connected to the second protective member 22; the first contact point 124 of the contact portion 12 contacts the component electrode pin 30.

[0117] Specifically, the first contact point 124 is the highest point of the contact portion 12 in the second direction (Y). The component electrode pin 30 is connected to the second protective member 22. When the electrode terminal 10 is inserted into the second protective member 22, the first contact point 124 of the contact portion 12 and the component electrode pin 30 make contact to achieve electrical connection between them.

[0118] Understandably, the direct contact between the first contact point 124 and the component electrode pin 30 enables efficient current transmission and ensures the normal operation of the electrical system. The component electrode pin 30 is connected to the second protective element 22, which provides it with stable mechanical support, reduces pin movement during operation, and thus ensures that the first contact point 124 and the component electrode pin 30 always maintain good contact, reducing problems such as increased resistance and unstable signal transmission caused by poor contact.

[0119] Optionally, when the contact portion 12 is inserted into the second protective member 22, the second contact point 125 abuts against the body portion 13.

[0120] Specifically, when the contact portion 12 is inserted into the second protective member 22, the first contact point 124 contacts the element electrode pin 30, and the second protective member 22 applies a pressure to the contact portion 12 along the second direction (Y) towards the body portion 13, causing the second contact point 125 to abut against the body portion 13.

[0121] Understandably, in this embodiment, the contact portion 12 is located on the same side of the body portion 13 along the third direction (Z) and the retaining portion 11, and the end connecting the contact portion 12 and the body portion 13 is bent to form an R-angle. The contact portion 12, when subjected to force, can move along the second direction (Y) towards the body portion 13. In practical applications, when the component electrode pin 30 is inserted into the second protective member 22, the contact portion 12 is pressed against the body portion 13. In this embodiment, the above arrangement allows the body portion 13 to be defined as a fixed constraint support end in the mechanical model, while the contact portion 12 is similar to the free movable end of a simply supported beam; the two work together to construct the simply supported beam mechanical structure. When the pressure applied by the component electrode pin 30 to the contact portion 12 acts on the free end of the simply supported beam (i.e., the contact portion 12), a force exists at the fixed constraint end of the beam (i.e., the connection between the body portion 13 and the contact portion 12) along the second direction (Y) away from the body portion 13. This can provide a higher positive force to the contact portion, which has the beneficial effect of improving the contact stability between the contact portion 12 and the component electrode pin 30. Simultaneously, the second contact point 125 abuts against the body portion 12, forming a stable triangular support structure between the contact portion 13 and the body portion 13, greatly enhancing the mechanical stability of the entire terminal assembly in this area. Even when the equipment is subjected to severe vibration or external impact, this structure can effectively disperse external forces, preventing component deformation or damage caused by excessive local stress, and ensuring the reliability of the connection between the electrode terminal 10 and the component electrode pin 30.

[0122] Furthermore, along the second direction Y, the height of the component electrode pin 30 is T, the distance between the first contact point 124 and the body portion 13 is B, and the distance between the second contact point 125 and the body portion 13 is A; wherein, (BA) < 1 / 2T.

[0123] In the embodiments of this application, such as Figure 2 and Figure 3 The first connecting arm 121, the second connecting arm 122, and the third connecting arm 123 are all inclined arms along the third direction Z. The first connecting arm 121 and the third connecting arm 123 have the same inclination direction, while the second connecting arm 122 has the opposite inclination direction to the other two connecting arms. These three connecting arms are sequentially connected to form the first contact point 124 and the second contact point 125. Along the second direction Y, the first contact point 124 is the highest point, and the second contact point 125 is the lowest point. When the component electrode pin 30 is inserted into the second protective member 22, the first contact point 124 contacts the component electrode pin 30, and the second contact point 125 abuts against the body portion 13 in the thickness direction. In other words, the contact portion 12 and the body portion 13 form a simply supported beam structure, which can provide a higher positive force to the electrode terminal 10, thereby improving the contact stability between the electrode terminal 10 and the component electrode pin 30.

[0124] Furthermore, the spacing between the first contact point 124 and the body portion 13, and the spacing between the second contact point 125 and the body portion 13, are related to the height of the component electrode pin 30. Specifically, the difference between the spacing between the second contact point 125 and the body portion 13 and the spacing between the first contact point 124 and the body portion 13 is less than half the height of the component electrode pin 30. This arrangement ensures that the height of the component electrode pin 30 is sufficient to cover the height difference between the first contact point 124 and the second contact point 125. This design, through flexible dual contact points and height difference constraints, achieves: electrical reliability, mechanical robustness, and assembly friendliness.

[0125] Understandably, the height T of the component electrode pin 30 along the second direction Y, and the distance B between the first contact point 124 and the body portion 13, and the distance A between the second contact point 125 and the body portion 13, where (B - A) < 1 / 2T, ensure that when the component electrode pin 30 contacts the electrode terminal 10, the first contact point 124 and the second contact point 125 maintain a reasonable and balanced contact pressure with the component electrode pin 30. This makes the entire structure more uniformly stressed when the component electrode pin 30 mates with the electrode terminal 10. It prevents the component electrode pin 30 from experiencing excessive bending moment or torque in the second direction Y due to unreasonable contact point spacing, thereby reducing the risk of deformation or even breakage of the component electrode pin 30, improving the stability and durability of the terminal assembly under mechanical stress, and ensuring long-term reliable operation of the product under complex working conditions.

[0126] In practical applications, when the component electrode pin 30 is inserted, it slightly compresses the contact portion 12, generating sufficient contact pressure to prevent incomplete connections or loosening. Furthermore, the small difference in BA (Balance of Contact) can distribute current or signal load, reducing the risk of single-point contact failure and improving reliability.

[0127] Furthermore, the terminal assembly also includes multiple components such as an electrode fixing component, a hexagonal fixing base, a metal shell, and a fluororubber sealing plug. The electrode terminal 10 is connected to the other end of the device via wire harness crimping. The electrode terminal is fixed by a first protective component 21 and a second protective component 22. The element electrode lead 30 can be a lead formed from multiple platinum sheets, fixed to both sides of the second protective component 22 by powder sintering. The element electrode lead 30 is fixed in the middle position by the electrode fixing component, which is entirely fixed within the hexagonal base. The hexagonal base and the metal shell are laser-welded to form a sealed space. The crimping part is crimped and fixed to the Teflon cable. The other end of the crimped wire harness first passes through the first mounting hole 211 of the fixing connector 30, and the crimping part first passes through the first mounting hole 211. Then, the electrode terminal 10 passes through and snaps into the first mounting hole 211.

[0128] Thirdly, this application also provides a gas sensor, including the terminal assembly as described above.

[0129] In this embodiment, the gas sensor includes the terminal assembly as described above, and also includes all the features and benefits of the terminal assembly, which are not limited in this embodiment.

[0130] It is understood that the gas sensor can be an oxygen sensor or other types of gas sensors, and the embodiments of this application do not limit it.

[0131] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0132] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electrode terminal (10) adapted to a protective element (20), characterized in that, It includes a retaining part (11), which includes at least a first protruding part (111) for limiting along a first direction (X) and a second protruding part (112) for limiting along a second direction (Y). Wherein, the first direction (X) is the width direction of the electrode terminal (10), and the second direction (Y) is the thickness direction of the electrode terminal (10).

2. The electrode terminal (10) according to claim 1, characterized in that, The second protruding portion (112) includes a first snap-fit ​​portion (1121) and a second snap-fit ​​portion (1122), the first snap-fit ​​portion (1121) and the second snap-fit ​​portion (1122) are independent of each other, the first snap-fit ​​portion (1121) and the second snap-fit ​​portion (1122) extend in the second direction (Y), and the extension directions are opposite in the second direction (Y).

3. The electrode terminal (10) according to claim 2, characterized in that, The first protruding portion (111) is disposed at the first end (11211) of the first snap-fit ​​portion (1121), the first end (11211) being the end of the first snap-fit ​​portion (1121) that is away from the second snap-fit ​​portion (1122) along the second direction (Y).

4. The electrode terminal (10) according to claim 3, characterized in that, The first end (11211) of the first snap-fit ​​portion (11211) is provided with a first groove (11212) on the first side, and the first protruding portion (111) is at least partially disposed in the first groove (11212); the first side is the side of the first end (11211) away from the second snap-fit ​​portion (1122) in the second direction (Y).

5. The electrode terminal (10) according to claim 4, characterized in that, The first protruding portion (111) includes a first side (1113) and a second side (1114) disposed along a third direction (Z); the first side (1113) is connected to the first snap-fit ​​portion (1121), and the second side (1114) is a free end; Wherein, the third direction (Z) is the length direction of the electrode terminal (10).

6. The electrode terminal (10) according to claim 5, characterized in that, The first protruding portion (111) includes an upper surface (1111) and a lower surface (1112) disposed opposite to each other along the second direction (Y). The upper surface (1111) is away from the second latching portion (1122) along the second direction (Y), and the lower surface (1112) is close to the second latching portion (1122) along the second direction (Y). The upper surface (1111) is an inclined surface, and the vertex of the inclined surface away from the first side (1113) protrudes from the side of the first end (11211) along the second direction (Y).

7. The electrode terminal (10) according to claim 6, characterized in that, The inclined surface gradually increases in distance from the bottom wall (11213) of the first groove (11212) towards the free end from the connection point between the first side (1113) and the first snap-fit ​​part (1121).

8. The electrode terminal (10) according to claim 6, characterized in that, There is a preset interval between the lower surface (1112) and the first snap-fit ​​portion (1121); Along the third direction (Z), the length of the preset interval is greater than the projection length of the first protruding part (111) on the body part (13).

9. The electrode terminal (10) according to any one of claims 2-7, characterized in that, It also includes a body part (13) and a contact part (12), one end of the body part (13) is connected to the holding part (11), and the other end of the body part (13) is connected to the contact part (12). Along the third direction (Z), the contact portion (12) is bent at an R-angle from the end of the body portion (13) away from the holding portion (11) toward the holding portion (11) and extends toward the holding portion (11).

10. The electrode terminal (10) according to claim 9, characterized in that, Along the third direction (Z), the second snap-fit ​​portion (1122) is located between the first snap-fit ​​portion (1121) and the main body portion (13).

11. The electrode terminal (10) according to claim 9, characterized in that, The first snap-fit ​​portion (1121) and the second snap-fit ​​portion (1122) are respectively disposed on both sides of the main body portion (13) along the second direction (Y).

12. The electrode terminal (10) according to claim 10, characterized in that, The first snap-fit ​​portion (1121) and the contact portion (12) are located on the same side of the body portion (13) along the second direction (Y).

13. The electrode terminal (10) according to claim 2, characterized in that, The number of the first latching parts (1121) is at least two, wherein the two first latching parts (1121) are arranged opposite each other along the first direction (X).

14. The electrode terminal (10) according to any one of claims 2-7, characterized in that, The second snap-fit ​​portion (1122) includes two curved wings (11221) disposed opposite each other along the first direction (X).

15. The electrode terminal (10) according to claim 9, characterized in that, The contact portion (12) includes a first connecting arm (121), a second connecting arm (122) and a third connecting arm (123) connected in sequence. The end of the first connecting arm (121) away from the second connecting arm (122) is connected to the body portion (13); the third connecting arm (123) is close to the holding portion (11). The distance between the first connecting arm (121) and the main body (13) gradually increases from the end away from the second connecting arm (122) to the end closer to the second connecting arm (122); The distance between the second connecting arm (122) and the body part (13) gradually decreases from the end away from the third connecting arm (123) to the end closer to the third connecting arm (123); The distance between the third connecting arm (123) and the main body (13) gradually increases from the end away from the retaining part (11) to the end close to the retaining part (11).

16. The electrode terminal (10) according to claim 15, characterized in that, The contact portion (12) includes a first contact point (124) and a second contact point (125). The first contact point (124) is the connection point between the first connecting arm (121) and the second connecting arm (122), and the second contact point (125) is the connection point between the second connecting arm (122) and the third connecting arm (123). Along the third direction (Z), the first contact point (124) is located on the side of the second contact point (125) away from the body part (13).

17. A terminal assembly, characterized in that, Includes an electrode terminal (10) as described in any one of claims 1 to 16 and a protective member (20), wherein the electrode terminal (10) passes through the protective member (20) and is snapped into the protective member (20); The first protruding portion (111) of the retaining part (11) is engaged with the protective member (20) along the first direction (X), and the second protruding portion (112) of the retaining part (11) is engaged with the protective member (20) along the second direction (Y). The contact portion (12) of the electrode terminal (10) is accommodated in the protective member (20).

18. The terminal assembly according to claim 17, characterized in that, The protective member (20) includes a first protective member (21) and a second protective member (22). The first protective member (21) and the second protective member (22) are arranged sequentially along the third direction (Z). The first extended portion (111) of the retaining part (11) is engaged with the first protective member (21) along the first direction (X). The second extended portion (112) of the retaining part (11) is engaged with the first protective member (21) along the second direction (Y). The contact part (12) and the second protective member (22) can abut against each other along the second direction (Y).

19. The terminal assembly according to claim 18, characterized in that, The first protective member (21) has a plurality of first mounting holes (211), and each of the electrode terminals (10) is independently corresponding to a plurality of first mounting holes (211). The retaining part (11) and part of the body part (13) of the electrode terminal (10) pass through the first mounting hole (211), and the retaining part (11) is interference-fitted with the first mounting hole (211).

20. The terminal assembly according to claim 19, characterized in that, The first assembly hole (211) includes a first hole segment (2111) and a second hole segment (2112) that are interconnected, and the second hole segment (2112) is disposed on the side of the first hole segment (2111) near the contact portion (12); The first hole segment (2111) and the first snap-fit ​​part (1121) are interference fit, and the second hole segment (2112) and the second snap-fit ​​part (1122) are snap-fit.

21. The terminal assembly according to claim 20, characterized in that, The inner wall of the first hole segment (2111) is provided with a side wall groove (2113) which is arranged opposite to the first direction (X). The side wall groove (2113) and the side wing are both interference fit along the first direction (X) and the second direction (Y).

22. The terminal assembly according to claim 21, characterized in that, The bottom wall of the second hole section (2112) is provided with a second groove (2114), and the second groove (2114) and the second snap-fit ​​part (1122) snap-fit ​​together.

23. The terminal assembly according to claim 17, characterized in that, The second protective member (22) has a plurality of second mounting holes (221), and each of the electrode terminals (10) is independently corresponding to a plurality of second mounting holes (221). The contact portion (12) and part of the body portion (13) pass through the second mounting holes (221), and part of the body portion (13) contacts the inner wall of the second mounting hole (221).

24. The terminal assembly according to any one of claims 17-23, characterized in that, The terminal assembly also includes component electrode pins (30), which are connected to the second protective element (22). The first contact point (124) of the contact portion (12) makes contact with the electrode pin (30) of the element.

25. The terminal assembly according to claim 24, characterized in that, When the second protective member (22) is inserted into the contact portion (12), the second contact point (125) and the body portion (13) abut against each other.

26. The terminal assembly according to claim 24, characterized in that, Along the second direction (Y), the thickness of the element electrode pin (30) is T. When the contact portion is in its natural state, the distance between the first contact point (124) and the body portion (13) is B, and the distance between the second contact point (125) and the body portion (13) is A. Among them, (BA) < 1 / 2T.

27. A gas sensing element, characterized in that, It includes the electrode terminals as claimed in any one of claims 1 to 16, or the terminal assembly as claimed in any one of claims 17 to 26.

Images