Low-cost temperature sensor

Abstract

The utility model discloses a low-cost temperature sensor, which comprises a metal bottom shell, a plastic part and a thermistor, the plastic part is provided with an insertion section and a riveting section, the metal bottom shell is sequentially provided with a riveting part, an insertion part and an induction part, and the thermistor is positioned in the induction part. The low-cost temperature sensor is simple in structure and convenient and fast to assemble. And the low-cost aluminum metal bottom shell is adopted, so that the material cost of the temperature sensor is reduced while the structural strength and the temperature sensing performance of the temperature sensor are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature sensors, and in particular relates to a low-cost temperature sensor. Background Art

[0002] Assembling temperature sensors by riveting can reduce the difficulty of assembly and improve machining efficiency. However, the existing temperature sensors need to extend the sensing part into the flowing liquid or gas to sense the temperature, and the temperature sensors need to be subjected to a certain impact force, which can easily cause the riveted parts to loosen, and then cause the internal thermistor wiring to loosen, ultimately making the temperature sensor inaccurate or even completely ineffective. At the same time, the existing temperature sensor has a relatively complex structure and uses a copper shell, which has a high material cost. Therefore, it is necessary to design a temperature sensor that is easy to assemble and low in cost. Utility Model Content

[0003] In order to solve the above technical problems, the technical solution adopted by the utility model is: a low-cost temperature sensor, including a metal bottom shell, a plastic part and a thermistor, the plastic part is provided with a plug-in section and a riveted section, the diameter of the plug-in section is smaller than the diameter of the riveted section, the metal bottom shell is provided with a riveted part, a plug-in part and a sensing part in sequence, the diameter of the plug-in part is smaller than the diameter of the riveted part, the riveted part has an annular support platform inside, the outer side of the riveted part is fixedly sleeved with a hexagonal nut, the plug-in section is placed around the annular support platform, the riveted section plug-in section is fixedly sleeved with a hexagonal nut, the plug-in section is placed around the annular support platform, the plug-in section is fixedly sleeved with a hexagonal nut ... The upper end of the riveted part is riveted inward and bent to be close to the upper end of the riveted section. A plurality of card strips are arranged around the plug-in section. A plurality of card slots are arranged around the inner wall of the upper end of the plug-in part. The card slots correspond to the card strips one by one. The card strips are inserted into the corresponding card slots. The thermistor is located inside the sensing part. A plug-in slot is arranged at the upper end of the plastic part. A copper sheet is fixed inside the plastic part. The upper end of the copper sheet extends into the plug-in slot to form a conductive plug. The lower end of the copper sheet extends into the inside of the plug-in part. The thermistor is connected to the lower end of the copper sheet through a conductive rod.

[0004] As a preferred embodiment of the above technical solution, a sealing ring is provided between the riveted section and the annular support platform, and the sealing ring is sleeved on the plug-in section.

[0005] As a preferred embodiment of the above technical solution, a plurality of notches are provided on the copper sheet, and a card block that fits into the notches is provided inside the plastic part, and the card block and the plastic part are integrally formed.

[0006] As a preferred embodiment of the above technical solution, an insulating barrier sheet is provided between adjacent conductive rods, an upper end of the insulating barrier sheet is fixedly connected to the plastic part, and the insulating barrier sheet and the plastic part are integrally formed.

[0007] As a preferred embodiment of the above technical solution, a sealing ring fixing groove is provided on the outer side of the plug-in portion, and a sealing ring is provided in the sealing ring fixing groove.

[0008] As a preferred embodiment of the above technical solution, the metal bottom shell is made of aluminum, and the hexagonal nut and the metal bottom shell are integrally formed.

[0009] The beneficial effects of the utility model are as follows: the low-cost temperature sensor of the utility model has a simple structure and is easy and quick to assemble. A low-cost aluminum metal bottom shell is used to ensure the structural strength and temperature sensing performance of the temperature sensor while reducing the material cost of the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model. DETAILED DESCRIPTION

[0012] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] like Figure 1-2As shown, a low-cost temperature sensor includes a metal bottom shell 1, a plastic part 2 and a thermistor 3. The plastic part 2 is provided with a plug-in section 4 and a riveted section 5. The diameter of the plug-in section 4 is smaller than the diameter of the riveted section 5. The metal bottom shell 1 is provided with a riveted portion 6, a plug-in portion 7 and a sensing portion 8 in sequence. The diameter of the plug-in portion 7 is smaller than the diameter of the riveted portion 6. The riveted portion 6 has an annular support platform 9 inside. The outer side of the riveted portion 6 is fixedly sleeved with a hexagonal nut 10. The surrounding of the plug-in section 4 is placed on the annular support platform 9. The riveted section 5 is inserted into the riveted portion 6. The upper end of the riveted portion 6 faces inward. After riveting and bending, it is close to the upper end of the riveted section 5. Several clamping strips 11 are arranged around the plug-in section 4. Several card slots 12 are arranged around the inner wall of the upper end of the plug-in part 7. The card slots 12 correspond to the clamping strips 11 one by one. The clamping strips 11 are inserted into the corresponding card slots 12. The thermistor 3 is located inside the sensing part 8. The upper end of the plastic part 2 is provided with a plug-in slot 13. A copper sheet is fixed inside the plastic part 2. The upper end of the copper sheet extends into the plug-in slot 13 to form a conductive plug 14. The lower end of the copper sheet extends into the plug-in part 7. The thermistor 3 is connected to the lower end of the copper sheet through a conductive rod 15. The combination of the clamping strip 11 and the card slot 12 can prevent the metal bottom shell 1 and the plastic part 2 from rotating relative to each other, thereby ensuring the riveting effect of the metal bottom shell 1 and the plastic part 2 for a long time. The plug-in part 7 is provided with an external thread. By rotating the hexagonal nut 10, the entire temperature sensor is driven to rotate, so that the temperature sensor is threadedly connected to the installation position.

[0016] Furthermore, a sealing ring 16 is provided between the riveted section 5 and the annular support platform 9, and the sealing ring 16 is sleeved on the plug-in section 4. The sealing ring 16 improves the sealing performance of the connection between the metal bottom shell 1 and the plastic part 2.

[0017] Furthermore, the copper sheet is provided with a plurality of notches, and a card block is provided inside the plastic part 2 to be inserted into the notches, and the card block and the plastic part 2 are integrally formed. The copper sheet is embedded inside the plastic part 2 when the plastic part 2 is formed. The cooperation between the notches and the card block improves the tightness of the connection between the copper sheet and the plastic part 2, prevents the copper sheet from loosening, and ensures the sealing of the connection between the copper sheet and the plastic part 2.

[0018] Furthermore, an insulating barrier sheet 17 is provided between adjacent conductive rods 15, the upper end of the insulating barrier sheet 17 is fixedly connected to the plastic part 2, and the insulating barrier sheet 17 is integrally formed with the plastic part 2. The insulating barrier sheet 17 prevents short circuits between the conductive rods 15 due to shaking and vibration, thereby ensuring the accuracy of temperature monitoring.

[0019] Furthermore, a sealing ring fixing groove 18 is provided on the outer side of the plug-in portion 7, and a sealing ring 19 is provided in the sealing ring fixing groove 18. The sealing ring 19 improves the sealing performance of the temperature sensor installation.

[0020] Furthermore, the metal bottom shell 1 is made of aluminum, and the hexagonal nut 10 is integrally formed with the metal bottom shell 1. The metal bottom shell 1 made of aluminum has low cost, high structural strength and good thermal conductivity.

[0021] It is worth mentioning that the technical features such as thermistors involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected according to the conventional methods in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated.

[0022] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the utility model on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. Low-cost temperature sensor, characterized by: The invention comprises a metal bottom shell, a plastic part and a thermistor, wherein the plastic part is provided with a plug-in section and a riveted section, the diameter of the plug-in section is smaller than the diameter of the riveted section, the metal bottom shell is provided with a riveted part, a plug-in part and a sensing part in sequence, the diameter of the plug-in part is smaller than the diameter of the riveted part, an annular support platform is provided inside the riveted part, a hexagonal nut is fixedly sleeved on the outer side of the riveted part, the plug-in section is placed on the annular support platform around, the riveted section is inserted into the riveted part, the upper end of the riveted part is riveted inwardly and bent to be close to the upper end of the riveted section, a plurality of clips are provided around the plug-in section, a plurality of slots are provided around the inner wall of the upper end of the plug-in part, the slots correspond to the clips one by one, the clips are inserted into the corresponding slots, the thermistor is located inside the sensing part, a plug-in slot is provided at the upper end of the plastic part, a copper sheet is fixedly provided inside the plastic part, the upper end of the copper sheet extends into the plug-in slot to form a conductive plug, the lower end of the copper sheet extends into the inside of the plug-in part, and the thermistor is connected to the lower end of the copper sheet through a conductive rod.

2. The low-cost temperature sensor according to claim 1, characterized in that A sealing ring is arranged between the riveting section and the annular supporting platform, and the sealing ring is sleeved on the plug-in section.

3. The low-cost temperature sensor according to claim 1, characterized in that The copper sheet is provided with a plurality of notches, and a clamping block inserted into the notches is provided inside the plastic part, and the clamping block and the plastic part are integrally formed.

4. The low-cost temperature sensor according to claim 1, characterized in that An insulating barrier sheet is arranged between adjacent conductive rods, the upper end of the insulating barrier sheet is fixedly connected to the plastic part, and the insulating barrier sheet and the plastic part are integrally formed.

5. The low-cost temperature sensor according to claim 4, characterized in that A sealing ring fixing groove is arranged on the outer side of the plug-in portion, and a sealing ring is arranged in the sealing ring fixing groove.

6. The low-cost temperature sensor according to claim 5, characterized in that The metal bottom shell is made of aluminum, and the hexagonal nut and the metal bottom shell are integrally formed.

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