Pyroelectric sensor with signal shielding shell

Abstract

The utility model discloses a pyroelectric sensor with a signal shielding shell, which relates to the technical field of sensors and comprises a base, a sealing sleeve is mounted at the top of the base, a lens is mounted at the top of the sealing sleeve, a shielding case is mounted on the outer wall of the sealing sleeve, and a fixing shaft is mounted on the inner wall of the shielding case. According to the utility model, through the arrangement of the sealing sleeve, the shielding case, the fixing shaft and the fixing sleeve, the shielding case is sleeved with the sealing sleeve, then the fixing shaft penetrates through the shielding case and the interior of the base and is fixed with the fixing sleeve in a threaded manner, and the arrangement of the shielding case can isolate sensitive elements and circuits in the sensor from external electromagnetic interference. When an external electromagnetic wave encounters the shielding case, an induced current is generated on the metal surface, so that the energy of the electromagnetic wave is consumed, the possibility that the electromagnetic wave enters the sensor is greatly reduced, the sensor can accurately detect a target thermal signal, and the anti-interference capability of the sensor is improved.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a pyroelectric sensor with a signal shielding shell. Background Technology

[0002] Pyroelectric sensors, due to their sensitivity to infrared radiation, have been widely used in numerous fields. For example, in security monitoring, they can detect human movement to achieve automatic alarm and monitoring functions. In smart homes, they can be used for automatic lighting control and intelligent start / stop of air conditioners to achieve energy saving and a convenient living experience. In industrial inspection, they can be used to detect temperature changes or specific thermal signals of objects, assisting in production process monitoring and quality inspection. However, with the increasing prevalence of electronic devices and the formation of complex electromagnetic environments, pyroelectric sensors face increasingly serious signal interference problems. Traditional methods to solve this problem include adding filters to the sensor's circuit design. While measures such as wave circuitry and optimized grounding can suppress some interference to a certain extent, their effectiveness is often limited in complex electromagnetic environments, especially for high-frequency, strong interference signals. Furthermore, the sensor pins are prone to bending and deformation during use, which may lead to inaccurate alignment between the pins and the sockets on the circuit board, affecting the robustness of the installation and the reliability of the electrical connection. In some mechanical structures with strict requirements on the sensor's installation position and angle, bent pins may affect the sensor's installation accuracy, causing it to be unable to accurately sense the infrared radiation of the target object. To solve the above problems, a pyroelectric sensor with a signal shielding shell is needed.

[0003] Existing pyroelectric sensors have problems such as being unable to effectively shield external interference signals and being unable to quickly straighten their pins during operation. Therefore, there is an urgent need for a pyroelectric sensor with a signal shielding shell. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a pyroelectric sensor with a signal shielding shell to solve the problems that existing pyroelectric sensors cannot effectively shield external interference signals and cannot quickly straighten the pins during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pyroelectric sensor with a signal shielding shell, comprising a base, a sealing sleeve mounted on the top of the base, a lens mounted on the top of the sealing sleeve, a shielding cover mounted on the outer wall of the sealing sleeve, a fixing shaft mounted on the inner wall of the shielding cover, a fixing sleeve mounted on the outer wall of the fixing shaft, pins mounted on the bottom of the base, a return spring mounted on the bottom of the base, a limit block mounted on the bottom of the return spring, a correction sleeve mounted on the outer wall of the limit block, and an insulating sleeve mounted on the outer wall of the correction sleeve.

[0006] Preferably, the shielding cover is fitted with a sealing sleeve, and the top of the shielding cover has an open design.

[0007] Preferably, the fixed shaft passes through the interior of the shielding shell and the base and is threadedly connected to the fixed sleeve, and the fixed shaft is arranged in a rectangular array with the central axis of the shielding shell as the center.

[0008] Preferably, the limiting block forms a telescopic structure with the base via a reset spring, and the reset spring is positioned at the center of the bottom of the base.

[0009] Preferably, the reset spring is welded to the limiting block, and the limiting block is engaged with the correction sleeve.

[0010] Preferably, the corrective sleeve is movably connected to the pin, and the insulating sleeve is sleeved with the corrective sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses a sealing sleeve, a shielding shell, a fixed shaft, and a fixed sleeve to connect the shielding shell to the sealing sleeve. Then, the fixed shaft passes through the interior of the shielding shell and the base and is threaded to the fixed sleeve. The shielding shell can isolate the sensitive elements and circuits inside the sensor from external electromagnetic interference. When external electromagnetic waves encounter the shielding shell, an induced current will be generated on the metal surface, thereby consuming the energy of the electromagnetic waves and greatly reducing the possibility of electromagnetic waves entering the sensor. This ensures that the sensor can accurately detect the target thermal signal and improve its anti-interference ability.

[0013] 2. This utility model, through the design of a pin, a return spring, a limiting block, a straightening sleeve, and an insulating sleeve, addresses the issue that pins are prone to bending and deformation due to uneven force or repeated insertion and extraction forces during use. Bent and deformed pins may affect the firmness of installation and the reliability of electrical connections. By pulling down the straightening sleeve, the sleeve moves downward along the root of the pin, limiting and straightening the pin during its downward movement. After straightening, releasing the straightening sleeve allows it to return to its original position using the return spring, without affecting the insertion and use of the pin. The straightening sleeve enables quick pin straightening, making operation more convenient. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the present utility model from the front view;

[0015] Figure 2 This is a side view of the structure of this utility model;

[0016] Figure 3 This is a structural schematic diagram showing the components surrounding the shielding cover of this utility model disassembled;

[0017] Figure 4 This is a structural schematic diagram showing the components surrounding the corrective sleeve of this utility model disassembled.

[0018] In the diagram: 1. Base; 2. Sealing sleeve; 3. Lens; 4. Shielding cover; 5. Fixed shaft; 6. Fixed sleeve; 7. Pin; 8. Return spring; 9. Limiting block; 10. Correcting sleeve; 11. Insulating sleeve. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The embodiments of this utility model will be described below based on its overall structure.

[0021] Please see Figure 1-4 A pyroelectric sensor with a signal shielding shell includes a base 1, a sealing sleeve 2 mounted on the top of the base 1, a lens 3 mounted on the top of the sealing sleeve 2, a shielding shell 4 mounted on the outer wall of the sealing sleeve 2, a fixing shaft 5 mounted on the inner wall of the shielding shell 4, and a fixing sleeve 6 mounted on the outer wall of the fixing shaft 5. The shielding shell 4 is sleeved with the sealing sleeve 2, and the top of the shielding shell 4 has an open design. The fixing shaft 5 passes through the interior of the shielding shell 4 and the base 1 and is threadedly connected to the fixing sleeve 6. The fixing shaft 5 is arranged in a rectangular array centered on the central axis of the shielding shell 4. The sensor consists of a sealing sleeve 2, a shielding shell 4, a fixed shaft 5, and a fixed sleeve 6. The shielding shell 4 is fitted onto the sealing sleeve 2, and then the fixed shaft 5 is threaded through the shielding shell 4 and the base 1 and fixed to the fixed sleeve 6. The shielding shell 4 isolates the sensitive elements and circuits inside the sensor from external electromagnetic interference. When external electromagnetic waves encounter the shielding shell 4, an induced current is generated on the metal surface, thereby consuming the energy of the electromagnetic waves and greatly reducing the possibility of electromagnetic waves entering the sensor. This ensures that the sensor can accurately detect the target thermal signal and improves its anti-interference capability.

[0022] Please see Figure 1-4A pyroelectric sensor with a signal shielding shell includes a base 1 with pins 7 mounted on its bottom, a return spring 8 mounted on its bottom, a limit block 9 mounted on its bottom, a correction sleeve 10 mounted on the outer wall of the limit block 9, and an insulating sleeve 11 mounted on the outer wall of the correction sleeve 10. The limit block 9 and the base 1 form a telescopic structure via the return spring 8, with the return spring 8 positioned at the center of the bottom of the base 1. The return spring 8 is welded to the limit block 9, and the limit block 9 is engaged with the correction sleeve 10. The correction sleeve 10 is movably connected to the pins 7, and the insulating sleeve 11 is sleeved with the correction sleeve 10. The sensor utilizes the pins 7, return spring 8, and limit block 9 to form a telescopic structure. Limiting block 9, straightening sleeve 10, and insulating sleeve 11 are used to address the issue that pin 7 is prone to bending and deformation due to uneven force or repeated insertion and extraction forces during use. Bending and deformed pin 7 may affect the firmness of installation and the reliability of electrical connection. By pulling down the straightening sleeve 10, the straightening sleeve 10 moves downward along the root of pin 7. During the downward movement, the straightening sleeve 10 limits and straightens pin 7. After straightening is completed, the straightening sleeve 10 is released, and the straightening sleeve 10 is reset by the rebound force of the return spring 8, without affecting the insertion and use of pin 7. The setting of the straightening sleeve 10 can quickly straighten pin 7, making the operation more convenient.

[0023] Working principle: In use, first move the device to the desired position, then fit the shielding cover 4 onto the sealing sleeve 2, and then thread the fixing shaft 5 through the interior of the shielding cover 4 and the base 1 and fix it to the fixing sleeve 6. The shielding cover 4 isolates the sensitive elements and circuits inside the sensor from external electromagnetic interference. When external electromagnetic waves encounter the shielding cover 4, an induced current is generated on the metal surface, thereby consuming the energy of the electromagnetic waves and greatly reducing the possibility of electromagnetic waves entering the sensor. This ensures that the sensor can accurately detect the target thermal signal and improves its anti-interference capability. However, the pin 7 is prone to bending and deformation due to uneven force or repeated insertion and extraction forces during use. A bent and deformed pin 7 may affect the installation. To ensure robustness and reliable electrical connections, the straightening sleeve 10 is pulled down, moving downwards along the root of pin 7. During this downward movement, the straightening sleeve 10 straightens and limits pin 7. After straightening, the straightening sleeve 10 is released, and it is reset by the return force of the return spring 8, without affecting the insertion and use of pin 7. The straightening sleeve 10 allows for quick straightening of pin 7, making operation more convenient. Finally, the lens 3 focuses the infrared light onto the built-in sensor receiving element, improving the sensor's infrared reception efficiency and thus enhancing the strength of the detection signal. This completes the use of the device. Any content not described in detail in this specification is prior art known to those skilled in the art.

[0024] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A pyroelectric sensor with a signal shielding shell, comprising a base (1), characterized in that: A sealing sleeve (2) is installed on the top of the base (1), a lens (3) is installed on the top of the sealing sleeve (2), a shielding cover (4) is installed on the outer wall of the sealing sleeve (2), a fixing shaft (5) is installed on the inner wall of the shielding cover (4), a fixing sleeve (6) is installed on the outer wall of the fixing shaft (5), a pin (7) is installed on the bottom of the base (1), a reset spring (8) is installed on the bottom of the base (1), a limit block (9) is installed on the bottom of the reset spring (8), a correction sleeve (10) is installed on the outer wall of the limit block (9), and an insulating sleeve (11) is installed on the outer wall of the correction sleeve (10).

2. The pyroelectric sensor with a signal shielding shell according to claim 1, characterized in that: The shielding cover (4) is fitted with the sealing sleeve (2), and the top of the shielding cover (4) is designed with an opening.

3. A pyroelectric sensor with a signal shielding shell according to claim 1, characterized in that: The fixed shaft (5) passes through the interior of the shielding shell (4) and the base (1) and is threadedly connected to the fixed sleeve (6). The fixed shaft (5) is arranged in a rectangular array with the central axis of the shielding shell (4) as the center.

4. A pyroelectric sensor with a signal shielding shell according to claim 1, characterized in that: The limiting block (9) forms a telescopic structure with the base (1) through the reset spring (8), and the reset spring (8) is set at the center of the bottom of the base (1).

5. A pyroelectric sensor with a signal shielding shell according to claim 1, characterized in that: The reset spring (8) is welded to the limiting block (9), and the limiting block (9) is engaged with the correction sleeve (10).

6. A pyroelectric sensor with a signal shielding shell according to claim 1, characterized in that: The corrective sleeve (10) is movably connected to the pin (7), and the insulating sleeve (11) is sleeved with the corrective sleeve (10).

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