NTC assembly for a sensor

Abstract

The utility model relates to sensor technical field, concretely is a kind of NTC component for sensor, including pedestal, NTC pillar, temperature sensing component, temperature sensing sheath and NTC heat-conducting silicone grease;Pedestal bottom is equipped with the NTC pillar of temperature sensing needle body slot, temperature sensing component contains symmetrical temperature sensing needle body and NTC thermistor, slot is partially embedded with the guiding support of temperature sensing needle body;Ntc pillar end is equipped with the cone extension section of V-shaped guide slot for short-circuit prevention;Pedestal and NTC pillar are equipped with reinforcing rib, temperature sensing sheath is sleeved and filled with heat-conducting silicone rubber between thermistor. This component can stably guide temperature sensing component, prevent short circuit, strengthen structure, guarantee heat conduction, ensure long-term accurate temperature detection.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to an NTC component for sensors. Background Technology

[0002] Ceramic capacitive temperature and pressure sensors are key components for achieving accurate combined temperature and pressure detection in fields such as industrial automation, automotive electronics, and medical equipment. Their internal NTC (negative temperature coefficient thermistor) component is the core temperature sensing structure, responsible for collecting ambient or medium temperature signals and transmitting them to the circuit board, providing the foundation for temperature compensation and accurate detection of pressure signals.

[0003] However, existing NTC components have many technical defects in practical applications, making it difficult to meet the requirements of long-term stable operation of sensors: First, the temperature sensing needle lacks a reliable guiding and supporting structure. Since the sensor is often under complex operating conditions such as vibration and temperature cycling, the temperature sensing needle is prone to bending or displacement, causing the NTC thermistor connected to it to be misaligned, making it impossible to accurately sense the temperature and directly reducing the temperature detection accuracy. Second, the connection between the temperature sensing needle and the NTC thermistor is a V-shaped structure. Existing designs do not have a protective guiding structure for this part. The two temperature sensing needles are prone to contacting each other during assembly or deformation under operating conditions, causing short circuit faults and resulting in the overall failure of the sensor. In addition, some components also have insufficient structural stability and thermal conductivity adaptability, making it difficult to fully adapt to the requirements of ceramic capacitive temperature and pressure sensors for long-term reliability and temperature response efficiency.

[0004] The aforementioned defects make it difficult for existing NTC components to guarantee the high-precision detection performance and long service life of sensors. Therefore, there is an urgent need for an NTC component that has stable guiding support, short-circuit protection, and can adapt to the working requirements of sensors. Utility Model Content

[0005] The purpose of this invention is to overcome the problems of the prior art and provide an NTC component for sensors. This addresses the technical issues of existing NTC components, such as the lack of reliable guiding support for the sensing needle, easy deformation, susceptibility to short circuits, and insufficient structural and thermal conductivity compatibility. It provides precise guidance and stable support for the temperature sensing component of ceramic capacitive temperature and pressure sensors, preventing deformation and short circuits of the sensing needle, strengthening the structural strength, and ensuring long-term accuracy and reliability of temperature detection.

[0006] The above objectives are achieved through the following technical solutions: An NTC component for a sensor includes: The base is fitted with a pressure port seat, and an NTC support is provided at the bottom of the base. The NTC support is symmetrically provided with temperature sensing needle slots. A temperature sensing component, comprising symmetrically arranged temperature sensing needles, the bottom ends of which are connected to an NTC thermistor, and the top ends of which are connected to a circuit board. The two temperature-sensing needle slots are respectively used to partially embed the two temperature-sensing needles, thereby guiding and supporting the temperature-sensing needles.

[0007] Furthermore, the NTC thermistor is located on the central axis of the NTC support.

[0008] Furthermore, the length of the NTC support is less than the length of the temperature-sensing needle.

[0009] Furthermore, the end of the NTC support is provided with a conical extension section, and the conical extension section is provided with a V-shaped guide groove that can communicate with the two temperature-sensing needle slots, for guiding and supporting the part of the temperature-sensing needle adjacent to the NTC thermistor.

[0010] Furthermore, the V-shaped guide groove can prevent the two temperature-sensing needles from coming into contact with each other and short-circuiting.

[0011] Furthermore, the NTC support is cylindrical.

[0012] Furthermore, the NTC support column is vertically connected to the base and integrally formed, and is made of plastic.

[0013] Furthermore, a number of NTC support reinforcing ribs are provided at the connection between the NTC support and the base.

[0014] Furthermore, it also includes a temperature-sensing sleeve, which is cylindrical and used to cover the NTC support and the temperature-sensing component after they are snapped together.

[0015] Furthermore, the space between the temperature-sensing sheath and the NTC thermistor is filled with NTC thermally conductive silicone grease.

[0016] This utility model provides an NTC assembly for a sensor. The base and NTC support are integrally formed and reinforced with ribs to enhance connection strength and prevent breakage. The temperature-sensing needle groove and the V-shaped guide groove of the conical extension of the NTC support provide precise guidance and support for the temperature-sensing needle, preventing deformation during long-term operation and avoiding short circuits between the two needles. The NTC thermistor is located on the central axis of the support, ensuring the symmetry and accuracy of temperature detection. The temperature-sensing sleeve provides protection and insulation, and the NTC thermally conductive silicone grease inside improves temperature transfer efficiency, reduces response hysteresis, and buffers vibration and shock to protect the thermistor. Overall, the assembly ensures long-term stable operation and meets the high precision and reliability requirements of sensor temperature detection. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of an NTC component for a sensor according to the present invention; Figure 2 This is an exploded view of an NTC component for a sensor according to the present invention. Figure 3 This is a schematic diagram showing the connection between the temperature sensing component and the NTC support in an NTC assembly for a sensor according to the present invention. Figure 4 This is an exploded view showing the connection between the temperature sensing component and the NTC support in an NTC assembly for a sensor according to the present invention.

[0018] Illustration markings: 1-Base, 101-NTC support column, 102-Temperature-sensing needle groove, 103-Conical extension section, 104-V-shaped guide groove, 105-NTC support column reinforcing rib; 2-Temperature sensing component, 201-Temperature sensing needle, 202-NTC thermistor; 3-Temperature-sensing sheath; 4-NTC thermal grease. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] like Figures 1-4 As shown, an NTC component for a sensor includes: Base 1: Can be fitted with a pressure port seat to provide a mounting base for the component. An NTC support column 101 is vertically mounted at its bottom and is integrally formed with the base; several NTC support column reinforcing ribs 105 (radially dispersing stress) are provided at the connection point to prevent the NTC support column from breaking. The NTC support column is cylindrical, with symmetrically arranged temperature-sensing needle slots 102 (symmetrical along the axis) on it for supporting and guiding the temperature-sensing component.

[0021] Temperature sensing component 2: Includes symmetrical temperature sensing needles 201. The bottom ends of the two temperature sensing needles are connected to the NTC thermistor 202, and the top ends are used to connect to the circuit board. Two temperature sensing needle slots 102 are respectively embedded in the temperature sensing needles to prevent deformation. The NTC thermistor 202 is located on the central axis of the NTC support to ensure detection symmetry. The length of the NTC support is less than the length of the temperature sensing needles, so that the top ends of the temperature sensing needles can be connected to the circuit board.

[0022] Because the connection between the temperature sensing needle and the NTC thermistor is V-shaped, a conical extension section 103 is provided at the end of the NTC support, and a V-shaped guide groove 104 is opened on it to communicate with the two temperature sensing needle slots. This guides and supports the part of the temperature sensing needle adjacent to the thermistor and prevents the two temperature sensing needles from short-circuiting.

[0023] Temperature sensing sleeve 3: It is cylindrical and is fitted onto the outside of the NTC support and temperature sensing component after snapping together, serving as protection, insulation and fixation.

[0024] NTC thermal grease 4: Filled between the temperature-sensing sleeve and the NTC thermistor, it ensures efficient heat conduction (rapid temperature transfer) and buffers vibration and shock, protecting the thermistor.

[0025] like Figure 1 and Figure 2 As shown, during assembly, two temperature-sensing needles 201 are respectively embedded into the temperature-sensing needle slots 102 of the NTC support 101, so that the temperature-sensing needle parts are snapped together; the NTC thermistor 202 at the bottom of the temperature-sensing needle corresponds to the central axis of the NTC support, and the temperature-sensing needle part adjacent to the thermistor is embedded into the V-shaped guide groove 104 of the conical extension section 103. The V-shaped groove provides support and prevents short circuits. The base 1 and the NTC support 101 are reinforced with reinforcing ribs 105 to prevent breakage. After the temperature-sensing sleeve 3 is fitted, NTC thermally conductive silicone grease 4 is filled between it and the NTC thermistor 202 to ensure heat conduction and buffer protection.

[0026] During operation, the ambient temperature is transferred to the NTC thermistor 202 through the temperature-sensing sleeve 3 and NTC thermal grease 4. The thermistor converts the temperature into a resistance signal, which is transmitted to the circuit board through the temperature-sensing needle 201. The groove and V-shaped guide groove of the NTC support stably support the temperature-sensing needle, preventing deformation and short circuit. The reinforcing ribs ensure structural strength, enabling the component to work stably for a long time.

[0027] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An NTC component for a sensor, characterized in that, include: The base (1) has an NTC support column (101) at its bottom, and the NTC support column (101) has symmetrically provided temperature sensing needle slots (102). Temperature sensing component (2), the temperature sensing component (2) includes symmetrically arranged temperature sensing needles (201), the bottom ends of the two temperature sensing needles (201) are connected to NTC thermistors (202), and the top ends are used to connect to the circuit board; The two temperature-sensing needle slots (102) partially embed the two temperature-sensing needles (201) respectively, thereby guiding and supporting the temperature-sensing needles (201).

2. An NTC component for a sensor according to claim 1, characterized in that, The NTC thermistor (202) is located on the central axis of the NTC support (101).

3. An NTC component for a sensor according to claim 1, characterized in that, The length of the NTC support (101) is less than the length of the temperature-sensing needle (201).

4. An NTC component for a sensor according to claim 1, characterized in that, The NTC support (101) is provided with a conical extension section (103) at its end. The conical extension section (103) is provided with a V-shaped guide groove (104) that can communicate with the two temperature-sensing needle slots (102) to guide and support the part of the temperature-sensing needle (201) adjacent to the NTC thermistor (202).

5. An NTC component for a sensor according to claim 4, characterized in that, The V-shaped guide groove (104) can prevent the two temperature-sensing needles (201) from coming into contact with each other and short-circuiting.

6. An NTC component for a sensor according to claim 1, characterized in that, The NTC support (101) is a cylinder.

7. An NTC component for a sensor according to claim 1, characterized in that, The NTC support (101) is vertically connected to the base (1) and integrally formed.

8. An NTC assembly for a sensor according to claim 1 or 7, characterized in that, Several NTC support reinforcing ribs (105) are provided at the connection between the NTC support (101) and the base (1).

9. An NTC component for a sensor according to claim 1, characterized in that, It also includes a temperature-sensing sleeve (3), which is cylindrical and used to cover the NTC support (101) and the temperature-sensing component (2) after they are snapped together.

10. An NTC component for a sensor according to claim 9, characterized in that, The temperature-sensing sheath (3) and the NTC thermistor (202) are filled with NTC thermal grease (4).

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