A sensitive element and terminal connection structure of an oxygen sensor

Abstract

The utility model relates to oxygen sensor technical field, specifically disclose a sensitive element and terminal connecting structure of oxygen sensor, through all the height of terminal fixing piece on the terminal flush setting, make the sensitive element on the connecting contact can be parallelly arranged, thereby shorten the length of sensitive element, reduce manufacturing cost, and the terminal fixing piece still is equipped with the limit step, the limit step on the terminal fixing piece and the casing of oxygen sensor contact when installing, thereby the centrifugal force is passed through the limit step and is delivered to the assembly casing, thereby reduce the fragment rate of sensitive element.

Description

Technical Field

[0001] This utility model relates to the field of oxygen sensor technology, and in particular to a connection structure between the sensitive element and the terminal of an oxygen sensor. Background Technology

[0002] An oxygen sensor is a sensing element used in electronic fuel injection vehicles, applied before and after the three-way catalytic converter, to improve vehicle emissions, save fuel, and enhance economy. Its working principle involves monitoring the oxygen concentration in the exhaust and converting it into an electrical signal, which is then fed back to the ECU control unit. This signal controls the fuel injection quantity to achieve the ideal air-fuel ratio, resulting in more complete combustion, improved emissions, fuel savings, and enhanced economy.

[0003] Currently, oxygen sensors generally include terminals and a sensing element. The terminals include long terminals and short terminals, and the sensing element has contacts for connecting to the terminals. Because the terminals are of different lengths, the contact positions on the sensing element are also different, which is equivalent to increasing the length of the sensing element and increasing manufacturing costs. Furthermore, the terminal fixing parts and terminal limiting parts on existing oxygen sensors are directly connected. During operation, the centrifugal force generated by vibration will be transmitted to the sensing element through the terminal limiting parts, which can easily lead to the breakage of the sensing element.

[0004] The technical problem to be solved by this application is: to design a sensitive element and terminal connection structure for an oxygen sensor that can reduce manufacturing costs and reduce the damage rate of sensitive elements. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a sensitive element and terminal connection structure for an oxygen sensor that can reduce manufacturing costs and reduce the damage rate of sensitive elements.

[0006] The technical solution adopted by this utility model is as follows: a connection structure between the sensitive element and the terminal of an oxygen sensor, including a sensitive element, a terminal fixing member and a terminal limiting member. The terminal fixing member is provided with a plurality of terminals, which are arranged at the same height on the terminal fixing member. The sensitive element is provided with a plurality of connection contacts corresponding to the terminals, which are arranged at the same height on the sensitive element. The terminal fixing member is also provided with a limiting step for maintaining its own stable transmission of centrifugal force.

[0007] In some embodiments, the terminal includes a left terminal and a right terminal, each terminal having a contact portion, with the contact portions of the left terminal and the right terminal corresponding to each other.

[0008] In some implementations, the sensitive element and the terminal limiting member are mutually limitingly engaged.

[0009] In some embodiments, the terminal limiting member is provided with a left terminal slot and a right terminal slot, with the left terminal and the left terminal slot mutually limiting each other, and the right terminal and the right terminal slot mutually limiting each other.

[0010] In some embodiments, the terminal limiting member is provided with a limiting hole, and the sensitive element is limited to the limiting hole. The left terminal slot and the right terminal slot are located on both sides of the limiting hole, and both the left terminal slot and the right terminal slot are connected to the limiting hole.

[0011] In some implementations, the limiting hole is flat.

[0012] In some implementations, the sensitive element is also provided with a ceramic block connected thereto.

[0013] In some embodiments, one end of the terminal limiting member is provided with a plurality of protrusions, the protrusions contacting one end of the ceramic block, or The protrusion contacts one end of the terminal fixing member.

[0014] This utility model has the following technical effects: by setting all terminals on the terminal fixing component at the same height, the contact points on the sensitive element can be set in parallel, thereby shortening the length of the sensitive element and reducing manufacturing costs. In addition, the terminal fixing component is also provided with a limiting step. During installation, the limiting step on the terminal fixing component contacts the housing of the oxygen sensor, thereby transferring the centrifugal force to the assembly housing through the limiting step, thereby reducing the breakage rate of the sensitive element. Attached Figure Description

[0015] Figure 1 This is an exploded view of the connection structure between the sensitive element and the terminal of the oxygen sensor of this utility model; Figure 2 This is an exploded view of the structure of the sensitive element and terminal connection of the oxygen sensor of this utility model.

[0016] The labels and names in the diagram correspond as follows: 1. Sensitive element; 2. Terminal fixing component; 3. Terminal limiting component; 20. Terminal; 10. Connecting contact point; 21. Limiting step; 201. Left terminal; 202. Right terminal; 22. Contact part; 30. Left terminal slot; 31. Right terminal slot; 33. Limiting hole; 4. Ceramic block; 34. Protrusion. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-2 This utility model provides a technical solution: a connection structure between the sensitive element and the terminal of an oxygen sensor, including a sensitive element 1, a terminal fixing member 2, and a terminal limiting member 3. The terminal fixing member 2 is provided with a plurality of terminals 20, which are arranged at the same height on the terminal fixing member 2. The sensitive element 1 is provided with a plurality of connection contacts 10 corresponding to the terminals 20, which are arranged at the same height on the sensitive element 1. The terminal fixing member 2 is also provided with a limiting step 21 for maintaining its own stable transmission of centrifugal force. By arranging all the terminals 20 at the same height on the terminal fixing member 2, the connection contacts 10 on the sensitive element 1 can be arranged in parallel, thereby shortening the length of the sensitive element 1 and reducing manufacturing costs. In addition, the terminal fixing member 2 is also provided with a limiting step 21. During installation, the limiting step 21 on the terminal fixing member 2 contacts the housing of the oxygen sensor, thereby transmitting the centrifugal force to the housing through the limiting step 21, thereby reducing the breakage rate of the sensitive element 1.

[0019] The sensitive element 1 is provided with a ceramic block 4 connected thereto. Several protrusions 34 are provided at one end of the terminal limiting member 3. Since the terminal limiting member 3 does not restrict the direction during installation, after the terminal limiting member 3 is installed, the protrusions 34 on the terminal limiting member 3 contact one end of the ceramic block 4 or contact one end of the terminal fixing member 2, thereby leaving a gap between the terminal limiting member 3 and the terminal fixing member 2 or the ceramic block 4, thus forming a reliable ventilation and heat dissipation space, thereby ensuring the stability of the sensor operation.

[0020] Terminal 20 includes a left terminal 201 and a right terminal 202. Each terminal 20 is provided with a contact portion 22. The contact portions 22 of the left terminal 201 and the right terminal 202 correspond to each other. In order to enable the terminal 20 to cooperate with the terminal limiting member 3, the terminal limiting member 3 is provided with a left terminal groove 30 and a right terminal groove 31 respectively. The left terminal 201 and the left terminal groove 30 are mutually limiting and cooperate, and the right terminal 202 and the right terminal groove 31 are mutually limiting and cooperate.

[0021] In order to enable the sensing element 1 and the terminal limiting member 3 to be in a limiting fit, the terminal limiting member 3 is provided with a limiting hole 33. The limiting hole 33 is flat and the sensing element 1 is in a limiting fit with the limiting hole 33. The left terminal slot 30 and the right terminal slot 31 are located on both sides of the limiting hole 33, and both the left terminal slot 30 and the right terminal slot 31 are connected to the limiting hole 33. When the left terminal 201 and the right terminal 202 are located in the left terminal slot 30 and the right terminal slot 31, respectively, the contact portion 22 on the left terminal 201 and the right terminal 202 can just contact the connection contact point 10 on the sensing element 1.

[0022] The working principle of this utility model is as follows: by setting all terminals 20 on the terminal fixing member 2 at the same height, the contact points 10 on the sensitive element 1 can be set in parallel, thereby shortening the length of the sensitive element 1 and reducing manufacturing costs. In addition, the terminal fixing member 2 is also provided with a limiting step 21. During installation, the limiting step 21 on the terminal fixing member 2 contacts the housing of the oxygen sensor, thereby transmitting the centrifugal force to the assembly housing through the limiting step 21, thereby reducing the breakage rate of the sensitive element 1.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection structure between the sensitive element and terminals of an oxygen sensor, characterized in that, It includes a sensitive element, a terminal fixing member, and a terminal limiting member. The terminal fixing member is provided with a plurality of terminals, which are arranged at the same height on the terminal fixing member. The sensitive element is provided with a plurality of connection contacts corresponding to the terminals, which are arranged at the same height on the sensitive element. The terminal fixing member is also provided with a limiting step for maintaining its own stable transmission of centrifugal force.

2. The oxygen sensor's sensitive element and terminal connection structure according to claim 1, characterized in that, The terminal includes a left terminal and a right terminal, and each terminal is provided with a contact portion, with the contact portions of the left terminal and the right terminal corresponding to each other.

3. The oxygen sensor's sensitive element and terminal connection structure according to claim 1, characterized in that, The sensitive element and the terminal limiting component are mutually limiting and cooperating.

4. The connection structure between the sensitive element and the terminal of the oxygen sensor according to claim 2, characterized in that, The terminal limiting member is provided with a left terminal slot and a right terminal slot respectively. The left terminal and the left terminal slot are mutually limiting and the right terminal and the right terminal slot are mutually limiting and cooperating.

5. The oxygen sensor's sensitive element and terminal connection structure according to claim 4, characterized in that, The terminal limiting member is provided with a limiting hole, and the sensitive element is limited to the limiting hole. The left terminal slot and the right terminal slot are located on both sides of the limiting hole, and both the left terminal slot and the right terminal slot are connected to the limiting hole.

6. The connection structure between the sensitive element and the terminal of the oxygen sensor according to claim 5, characterized in that, The limiting hole is flat.

7. The oxygen sensor's sensitive element and terminal connection structure according to claim 1, characterized in that, The sensitive element also has a ceramic block connected to it.

8. The oxygen sensor's sensitive element and terminal connection structure according to claim 7, characterized in that, One end of the terminal limiting member is provided with several protrusions, and the protrusions are in contact with one end of the ceramic block, or The protrusion contacts one end of the terminal fixing member.

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