NTC temperature sensor with high insulation sealing performance

Abstract

The utility model provides an NTC temperature sensor with high insulation sealing performance, and belongs to the technical field of circuit elements. Comprising a protective shell, the bottom of the protective shell is provided with a cover plate, the top of the cover plate is fixedly provided with a sensor body, the bottom of the sensor body is fixedly connected with welding feet and a fixing assembly, the fixing assembly is used for assembling the cover plate and the protective shell, the fixing assembly abuts against the assembled cover plate and the protective shell, and the top of the cover plate is provided with an annular protrusion. An annular groove is formed in the bottom of the protective shell. According to the utility model, the sealing ring is arranged and is used as a key connecting part, so that the assembly process between the cover plate and the protective shell becomes very simple, convenient and rapid, and a worker can easily and tightly combine the cover plate and the protective shell without complicated operation or tools; and secondly, after the sealing ring is assembled, the overall sealing performance of the sensor can be greatly improved, and the sensor is worthy of popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit elements, in particular to an NTC temperature sensor with high insulation and sealing properties. Background Art

[0002] NTC temperature sensors are widely used in electrical equipment such as electric pressure cookers, air conditioners, refrigerators, water heaters and water dispensers. NTC thermistors have the characteristics of high sensitivity and simple structure. The thermistor of the existing NTC temperature sensor is arranged inside the protective shell, and the probe is arranged outside the protective shell. The thermistor and the probe are connected by a wire.

[0003] The utility model patent with announcement number CN 219870012 U proposes an NTC temperature sensor with high insulation and sealing performance, including a protective shell, a rotating shaft groove is provided on the inner side wall of the protective shell, a rotating shaft is provided in the rotating shaft groove, a fixing member is provided on the rotating shaft, a torsion spring is provided on the outer surface of the rotating shaft, a thermistor is provided inside the protective shell, a wire is provided at the bottom of the thermistor, an insulating layer is provided at the bottom of the thermistor, a probe is provided at one end of the wire away from the thermistor, and an opening is provided in the middle of the bottom of the protective shell. The utility model can prevent moisture and dust in the external environment from entering the inside of the protective shell through the protective shell, the rotating shaft, the fixing member, the torsion spring, the thermistor, the first sealing gasket, the sealing plate, the through hole, the rubber sheet, the bolt, and the second sealing gasket, so as to avoid reducing the insulation performance of the NTC temperature sensor; the thermistor is clamped and fixed inside the protective shell by two groups of fixing members.

[0004] Although the above case can play a certain sealing role in actual use, the designed structure is relatively complex and requires bolts for installation. Not only is the assembly very time-consuming, but the production cost is also high, which makes it difficult to meet existing needs. Therefore, the utility model provides an NTC temperature sensor with high insulation and sealing properties to meet the needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a high-insulation and sealing NTC temperature sensor sealing ring as a key connecting component, so that the assembly process between the cover plate and the protective shell becomes extremely simple and fast, and the staff can easily and tightly combine the cover plate and the protective shell without complicated operations or tools. Secondly, the sealing ring can greatly improve the overall sealing of the sensor after assembly, and it is worthy of popularization and use. Through the above arrangement, the problem that the existing technology can play a certain sealing role in actual work, but the design structure is relatively complex and needs to be installed with bolts, which not only has high production and manufacturing costs, but also is very time-consuming to assemble can be solved.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A NTC temperature sensor with high insulation and sealing performance comprises a protective shell, a cover plate is arranged at the bottom of the protective shell, a sensor body is fixedly installed on the top of the cover plate, a welding foot is fixedly connected to the bottom of the sensor body, and a fixing component is used to assemble the cover plate and the protective shell, and the fixing component and the assembled cover plate and the protective shell are in conflict.

[0008] Optionally, an annular protrusion is provided on the top of the cover plate, an annular groove is provided on the bottom of the protective shell, and a diameter of the annular protrusion is smaller than a diameter of the annular groove.

[0009] Optionally, the fixing assembly includes a sealing ring, which is divided into a sealing part No. 1 and a sealing part No. 2, the sealing part No. 1 is located in the gap between the annular protrusion and the annular groove, deformation cavities are provided inside on both sides of the sealing part No. 1, and limiting protrusions integrally formed with the deformation cavity are provided on both sides of the sealing part No. 1, and limiting grooves matching the limiting protrusions are provided on the opposite surfaces of the annular protrusion and the annular groove.

[0010] Optionally, an arc-shaped protrusion is provided on the outside of the cover plate, the No. 2 sealing part is located in the gap between the annular protrusion and the annular groove, and a limiting part is provided at the outer end of the No. 2 sealing part, and the limiting part is wrapped around the outside of the arc-shaped protrusion.

[0011] Optionally, an outward-turning portion is provided on the outside of the limiting portion, and the outward-turning portion is a "C"-shaped structure.

[0012] Optionally, the sealing ring is integrally injection molded.

[0013] Optionally, two sides of the No. 1 sealing part are respectively fitted with the protective shell and the cover plate, and the top and bottom of the No. 2 sealing part are respectively fitted with the protective shell and the cover plate.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] In the above scheme, by setting a sealing ring, which serves as a key connecting component, the assembly process between the cover plate and the protective shell becomes extremely simple and fast. The staff can easily and tightly combine the cover plate and the protective shell without complicated operations or tools. Secondly, the sealing ring can greatly improve the overall sealing of the sensor after assembly, and it is worthy of promotion and use.

[0016] By setting up an integrally molded sealing component, multiple seals can be achieved. The integrally molded structure ensures the integrity and consistency of the sealing component. There are no additional connecting or assembling parts, thereby avoiding the degradation of sealing performance due to gaps or defects that may exist at the connection. The integrally molded structure also improves the durability and reliability of the sealing component. Since the entire sealing ring is made of a single material and there are no interfaces or transition parts between different materials, it has better anti-aging, anti-corrosion and wear resistance. The integrally molded structure also simplifies the installation and replacement process of the sealing ring. Since the connection between the sealing ring and the cover plate and the protective shell is achieved by simple pressing and snapping, the staff can complete the installation without complicated operations or tools. The integrally molded structure also reduces material waste and energy consumption in the production process, greatly reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the NTC temperature sensor;

[0019] Figure 2 This is the assembly diagram of the NTC temperature sensor;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of the sealing ring;

[0021] Figure 4 is a partial cross-sectional view of the temperature sensor;

[0022] Figure 5 for Figure 4 An enlarged schematic diagram of point A.

[0023] [reference numerals]

[0024] 1. Protective shell; 2. Cover plate; 3. Welding foot; 4. Sealing ring; 401. Sealing part No. 1; 402. Deformation cavity; 403. Limiting protrusion; 404. Sealing part No. 2; 405. Limiting part; 406. Arc-shaped protrusion; 407. Outward-turning part; 5. Sensor body.

[0025] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0026] The following is a detailed description of a high insulation and sealing NTC temperature sensor and its use method provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0027] like Figures 1 to 5As shown, an embodiment of the utility model provides an NTC temperature sensor with high insulation and sealing performance, including a protective shell 1, a cover plate 2 is arranged at the bottom of the protective shell 1, a sensor body 5 is fixedly installed on the top of the cover plate 2, a welding foot 3 is fixedly connected to the bottom of the sensor body 5, a fixing component, the fixing component is used to assemble the cover plate 2 and the protective shell 1, the fixing component and the assembled cover plate 2 and the protective shell 1 are in conflict, an annular protrusion is arranged on the top of the cover plate 2, an annular groove is arranged at the bottom of the protective shell 1, the diameter value of the annular protrusion is smaller than the diameter value of the annular groove, the fixing component includes a sealing ring 4, the sealing ring 4 is divided into a No. 1 sealing part 401 and a No. 2 sealing part 404, the No. 1 sealing part 40 1 is located in the gap between the annular protrusion and the annular groove, a deformation cavity 402 is provided inside both sides of the No. 1 sealing part 401, and a limiting protrusion 403 integrally formed with the deformation cavity 402 is provided on both sides of the No. 1 sealing part 401, and a limiting groove matched with the limiting protrusion 403 is provided on the opposite surface of the annular protrusion and the annular groove, and an arc-shaped protrusion 406 is provided on the outside of the cover plate 2, and the No. 2 sealing part 404 is located in the gap between the annular protrusion and the annular groove, and a limiting part 405 is provided at the outer end of the No. 2 sealing part 404, and the limiting part 405 is wrapped around the outside of the arc-shaped protrusion 406, and the two sides of the No. 1 sealing part 401 are respectively fitted with the protective shell 1 and the cover plate 2, and the No. 2 sealing part 40 The top and bottom of 4 are respectively fitted with the protective shell 1 and the cover plate 2. During use, the sealing ring 4 is placed at the bottom of the protective shell 1 to ensure that the No. 1 sealing part 401 is located in the annular groove, and the cover plate 2 is aligned with the protective shell 1 so that the annular protrusion matches the annular groove. In this process, since the annular protrusion is inserted into the annular groove, the deformation cavity 402 on both sides of the No. 1 sealing part 401 will be squeezed, so that the limiting protrusion 403 will first be recessed into the interior of the deformation cavity 402. After the pressure disappears, it will closely cooperate with the limiting card groove under the action of its own elasticity to achieve preliminary fixation. At the same time, the limiting part 405 of the No. 2 sealing part 404 will be wrapped around the outside of the arc-shaped protrusion 406, and then The sealing performance and stability are increased in one step, and the sealing ring 4 can be easily removed, which not only simplifies the assembly steps of the sensor, but also improves the sealing effect of the sensor. The No. 1 sealing part 401 and the No. 2 sealing part 404 form a multi-layer sealing structure between the cover plate 2 and the protective shell 1. When the cover plate 2 and the protective shell 1 are tightly matched, the No. 1 sealing part 401 realizes the first layer of sealing through the cooperation of the deformation cavity 402 and the limiting protrusion 403 with the limiting card groove, and the limiting part 405 and the outward turning part 407 of the No. 2 sealing part 404 form the second layer of sealing to ensure that the external environment cannot invade the interior of the sensor. This multi-layer sealing structure not only improves the sealing performance, but also enhances the overall stability and durability.

[0028] An outward-turning portion 407 is provided on the outside of the limiting portion 405, and the outward-turning portion 407 is a "C"-shaped structure. The limiting portion 405 can be easily separated from the arc-shaped protrusion 406 through the "C"-shaped structure of the outward-turning portion 407. During use, the outward-turning portion 407 can be pushed upward, and the "C"-shaped structure can make the outward-turning portion 407 more easily subjected to force. When the outward-turning portion 407 is forced to flip upward, it will drive the limiting portion 405 to flip upward together, thereby enabling the limiting portion 405 to be separated from the arc-shaped protrusion 406, thereby facilitating the disassembly of the protective shell 1 and the cover plate 2.

[0029] like Figure 3 As shown, the sealing ring 4 is integrally injection molded, and can be rapidly injected through a fixed mold during the actual manufacturing process, which can not only greatly reduce the production cost, but also the integrated structure can improve the overall sealing of the sealing assembly. Compared with the multi-layer sealing proposed in the comparative document, it can not only reduce the production cost, but also ensure the overall sealing performance of the temperature sensor, and is worthy of promotion and use.

[0030] The working principle provided by the utility model is to prepare all components such as the protective shell 1, the cover plate 2, the sensor body 5, the welding foot 3 and the sealing ring 4, check whether each component is intact, ensure that the size of the annular protrusion matches the annular groove, place the sealing ring 4 at the bottom of the protective shell 1, ensure that the No. 1 sealing part 401 is located in the annular groove, fix the sensor body 5 on the top of the cover plate 2, align the cover plate 2 with the protective shell 1, ensure that the annular protrusion and the annular groove can be fully matched, in this process, the annular protrusion is inserted into the annular groove, and the deformation cavity 402 on both sides of the No. 1 sealing part 401 will be squeezed, so that the limiting protrusion 403 First, it is recessed into the deformation cavity 402. After the pressure disappears, the limiting protrusion 403 of the No. 1 sealing part 401 is tightly matched with the limiting slot under the action of its own elasticity to achieve preliminary fixation. The limiting part 405 of the No. 2 sealing part 404 is wrapped on the arc-shaped protrusion 406 on the outside of the cover plate 2, so as to further increase the sealing and stability. The outward-turning part 407 of the No. 2 sealing part 404 is pushed upward, and the "C"-shaped structure makes it easy for the outward-turning part 407 to turn up under force. When the outward-turning part 407 turns up, it drives the limiting part 405 to turn up together, so that the limiting part 405 is separated from the arc-shaped protrusion 406. After separation, the protective shell 1 and the cover plate 2 can be easily disassembled.

[0031] The sensor body 5 in the present utility model is disclosed in the prior art and will not be described in detail here.

[0032] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An NTC temperature sensor with high insulation and sealing performance, comprising a protective housing (1), characterized in that: A cover plate (2) is provided at the bottom of the protective housing (1), a sensor body (5) is fixedly mounted on the top of the cover plate (2), and a welding foot (3) is fixedly connected to the bottom of the sensor body (5); A fixing component, the fixing component is used to assemble the cover plate (2) and the protective shell (1), and the fixing component is in conflict with the assembled cover plate (2) and the protective shell (1).

2. The NTC temperature sensor with high insulation and sealing performance according to claim 1, characterized in that: An annular protrusion is provided on the top of the cover plate (2), an annular groove is provided on the bottom of the protective shell (1), and the diameter of the annular protrusion is smaller than the diameter of the annular groove.

3. The NTC temperature sensor with high insulation and sealing performance according to claim 2, characterized in that: The fixing assembly comprises a sealing ring (4), the sealing ring (4) being divided into a No. 1 sealing part (401) and a No. 2 sealing part (404), the No. 1 sealing part (401) being located in a gap between the annular protrusion and the annular groove, a deformation cavity (402) being provided inside both sides of the No. 1 sealing part (401), a limiting protrusion (403) being integrally formed with the deformation cavity (402) being provided on both sides of the No. 1 sealing part (401), and a limiting groove matching the limiting protrusion (403) being provided on the opposite surfaces of the annular protrusion and the annular groove.

4. The NTC temperature sensor with high insulation and sealing performance according to claim 3, characterized in that: An arc-shaped protrusion (406) is provided on the outside of the cover plate (2), the second sealing portion (404) is located in the gap between the annular protrusion and the annular groove, and a limiting portion (405) is provided on the outer end of the second sealing portion (404), and the limiting portion (405) is wrapped around the outside of the arc-shaped protrusion (406).

5. The NTC temperature sensor with high insulation and sealing performance according to claim 4, characterized in that: An outward-turning portion (407) is provided on the outside of the limiting portion (405), and the outward-turning portion (407) is a "C"-shaped structure.

6. The NTC temperature sensor with high insulation and sealing performance according to claim 3, characterized in that: The sealing ring (4) is integrally injection molded.

7. The NTC temperature sensor with high insulation and sealing performance according to claim 4, characterized in that: The two sides of the No. 1 sealing part (401) are respectively fitted with the protective shell (1) and the cover plate (2), and the top and bottom of the No. 2 sealing part (404) are respectively fitted with the protective shell (1) and the cover plate (2).

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