Lens press-fitting equipment of PM2.5 sensor

Abstract

The utility model discloses a lens press-fitting device of a PM2.5 sensor. The lens press-fitting device of the PM2.5 sensor can effectively solve the problems that manual press-fitting of a lens is not in place, the lens is deformed and damaged, and the surface of the lens is prone to being polluted. The device comprises a base which is provided with a product positioning groove with an upward opening; the lifting table is provided with two parallel lens pressing rods, the lens pressing rods are spring ejector pins and comprise sliding pressing rods capable of ascending and descending vertically, and the two lens pressing rods are both located over the product positioning groove; and the lifting execution mechanism drives the lifting table to lift up and down.

Description

Technical Field

[0001] The utility model relates to a manufacturing device for PM2.5 sensors, in particular to a lens pressing device for PM2.5 sensors. Background Art

[0002] As a high-tech industry, PM2.5 dust sensors use lenses (a type of convex lens made of optical plastic with the function of magnifying dust images) as key components. A PM2.5 dust sensor has two lenses, and the two lenses need to be pressed simultaneously at the same horizontal height. Therefore, the installation process has relatively high requirements.

[0003] In the traditional installation method, manual lens pressing is used, which has the following disadvantages.

[0004] Firstly, when manually pressing the lens, fingerprints may appear, contaminating the lens surface.

[0005] Secondly, in order to prevent the lens from loosening after being installed, anti-loosening measures for the lens are set in the product cavity, and a certain force is required for lens pressing. Therefore, it is difficult to control the force, direction, and depth during the manual pressing process, and it is easy to have the problem that the lens is not pressed in place, making it difficult to ensure that the two lenses are at the same horizontal height. In addition, uneven pressure is likely to cause lens deformation and damage.

[0006] Thirdly, there is the problem of missing lens installation.

[0007] As a result, product defects and large product precision deviations occur, causing a large amount of manual rework and material waste during large-scale production. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a lens pressing device for PM2.5 sensors, which can effectively solve the problems of incomplete manual lens pressing, lens deformation and damage, and easy contamination of the lens surface.

[0009] The technical solution of the utility model is as follows:

[0010] A lens pressing device for PM2.5 sensors, characterized by comprising:

[0011] A base, on which a product positioning groove with an upward opening is provided;

[0012] A lifting table, on which two mutually parallel lens pressing rods are provided. The lens pressing rods are spring ejector pins, which include sliding pressing rods that can move up and down. Both lens pressing rods are located directly above the product positioning groove;

[0013] A lifting execution mechanism for driving the lifting table to move up and down. The specific use of the lens pressing device for PM2.5 sensors in this solution is as follows.

[0014] The lifting actuator drives the lifting platform to move upward to the in-place position;

[0015] Pre-load two lenses into the lens card slots of the PM2.5 sensor product. When pre-loading the lenses, just place the lenses in the lens card slots without pressing down the lenses;

[0016] Place the PM2.5 sensor product with pre-loaded lenses into the product positioning slot. At this time, the sliding rods of the two lens pressing rods are respectively located directly above the two lenses;

[0017] Then, the lifting actuator drives the lifting platform to descend until the lifting platform moves downward to the in-place position. During this process, the lower end of the sliding rod presses on the lens, pressing the lens downward until the lens is pressed in place. After that, during the downward movement of the lifting platform, the sliding rod moves upward against the force of the spring of the spring ejector pin until the lifting platform moves downward to the in-place position. Since the lens pressing rod is a spring ejector pin, there will be no rigid collision between the sliding rod and the lens during the process of pressing down the lens, avoiding deformation and damage of the lens. Therefore, it is possible to avoid the problem of deformation and damage of the lens caused by the rigid collision between the sliding rod and the lens when the lens is pressed in place. This solution uses a lens pressing device to press two lenses into the correct positions of the product at the same time, completing the lens pressing operation, ensuring the consistency of the pressing force, depth and direction during the lens pressing process, reducing the work intensity of the operators, and also reducing the operators' contact with the lenses, reducing lens contamination. During the lens pressing process, the lenses are not deformed, damaged or contaminated, and the lenses are pressed in place so that the horizontal heights of the two lenses are kept consistent. Therefore, it can effectively solve the problems of incomplete manual lens pressing, lens deformation and damage, and contamination of the lens surface.

[0018] Preferably, it further includes two limit sensors arranged on the lifting platform. The limit sensors correspond to the lens pressing rods one by one. The two limit sensors are at the same height and are located above the corresponding sliding pressing rods. When the lifting actuator drives the lifting platform to move upward in place, the lower ends of the sliding pressing rods of the two lens pressing rods are at the same height, and the upper ends of the sliding pressing rods of the two lens pressing rods are also at the same height. During the process of pressing the lens, the lower end of the sliding pressing rod presses on the lens and presses the lens downward until the lens is pressed in place. After that, when the lifting platform continues to move downward and the sliding pressing rod moves upward against the spring force of the spring ejector pin, if the upper ends of the sliding pressing rods of the two lens pressing rods trigger the limit sensors simultaneously, it indicates that after the lens pressing rods press the lens in place, the upper ends of the sliding pressing rods of the two lens pressing rods are at the same height. At this time, the two lenses are at the same horizontal height and the lens pressing is qualified; otherwise, it indicates that after the lens pressing rods press the lens in place, the upper ends of the sliding pressing rods of the two lens pressing rods are not at the same height. At this time, the two lenses are not at the same horizontal height and the lens pressing is unqualified. The reasons for this situation may be that one of the lenses is not installed, or one of the lenses is stuck and not pressed in place, or there are problems with the manufacturing accuracy in the lens slot of the lens and the product itself. In this way, it can be timely determined whether the lens pressing is qualified to ensure the product qualification rate. When the lens pressing is unqualified, repair is carried out. This can also effectively solve the problem of missing lenses in manual lens pressing.

[0019] Preferably, it further includes an indicator light and a buzzer. In this way, the operator can be prompted whether the lens pressing is qualified through the indicator light and the buzzer.

[0020] Preferably, during the process of the lifting actuator driving the lifting platform to move downward, if the upper ends of the sliding pressing rods of the two lens pressing rods trigger the limit sensors simultaneously, the indicator light shows green; if the upper ends of the sliding pressing rods of the two lens pressing rods do not trigger the limit sensors simultaneously, the indicator light shows red and the buzzer sounds. In this way, the operator can be prompted whether the lens pressing is qualified through the indicator light and the buzzer.

[0021] Preferably, it further includes a limit switch and a limit contact rod. One of the limit switch and the limit contact rod is arranged on the lifting platform, and the other is arranged on the base. When the lifting actuator drives the lifting platform to move downward in place, the limit contact rod triggers the limit switch. In this way, when the limit contact rod triggers the limit switch, it indicates that the lifting actuator drives the lifting platform to move downward in place and the lens pressing action is completed.

[0022] Preferably, the base is further provided with a product positioning block. The product positioning block is installed on the base through bolts, and a product positioning groove is arranged on the upper surface of the product positioning block. In this way, by replacing the product positioning block, the lens pressing of PM2.5 sensor products with different model sizes and shapes can be adapted, and the versatility of the lens pressing equipment can be improved.

[0023] Preferably, positioning posts are further provided on the bottom surface of the product positioning groove. In this way, the PM2.5 sensor product is positioned by the product positioning groove and the positioning posts together.

[0024] Preferably, vertical guide rods are provided on the base, and the lifting table moves up and down along the vertical guide rods. In this way, the stable lifting of the lifting table is ensured, and thus the stable pressing of the lens by the lens pressing rod is ensured.

[0025] Preferably, an upper frame is further provided on the base. The upper frame is located above the base, and the lifting execution mechanism is installed on the upper frame. A downward pressing button is further provided on the base, and the downward pressing button controls the lifting execution mechanism to drive the lifting table to descend.

[0026] Preferably, the lifting execution mechanism is a cylinder or an electric cylinder or an electric push rod.

[0027] The beneficial effects of the present utility model are as follows:

[0028] Firstly, the pressing force, depth and direction consistency during the lens pressing process are ensured. When the lens is pressed in place, the rigid collision between the sliding pressing rod and the lens can be avoided, thus preventing the problems of lens deformation and damage, and effectively solving the problems of manual lens pressing not in place, lens deformation and damage.

[0029] Secondly, through the cooperation of the lens pressing rod and the limit sensor, the detection of the effect during the lens pressing process is realized, ensuring that the horizontal heights of the two lenses are the same after pressing.

[0030] Thirdly, the working intensity of the operators is reduced, and the lens pressing efficiency of the product is improved; and the contact of the operators with the lens is reduced, reducing lens pollution. The lens does not deform, get damaged or polluted during the lens pressing process, and the rework caused by poor lens pressing is reduced, improving the production yield of the PM2.5 sensor. Description of the Drawings

[0031] Figure 1 is a three-dimensional structure diagram of a certain perspective of a lens pressing device for a PM2.5 sensor of the present utility model.

[0032] Figure 2 is a three-dimensional structure diagram of another perspective of a lens pressing device for a PM2.5 sensor of the present utility model.

[0033] Figure 3 is a side view of a certain perspective of a lens pressing device for a PM2.5 sensor of the present utility model.

[0034] Figure 4 is a structure diagram of a PM2.5 sensor product of the present utility model.

[0035] Figure 5 This is a schematic structural diagram of a lens press-fitting device for a PM2.5 sensor of the present utility model during actual use.

[0036] In the figure:

[0037] Base 1, product positioning groove 1.1, product positioning block 1.2, vertical guide rod 1.3;

[0038] Lifting table 2;

[0039] Lifting execution mechanism 3;

[0040] Lens pressing rod 4, sliding pressing rod 4.1;

[0041] Limit sensor 5;

[0042] Upper frame 6;

[0043] Lower pressing button 7;

[0044] Indicator light 8;

[0045] Rise button 9;

[0046] Limit switch 10;

[0047] Limit contact rod 11;

[0048] PM2.5 sensor product 12;

[0049] Lens 13;

[0050] Lens card slot 14. Specific implementation mode

[0051] Specific embodiment 1, as Figure 1 、 Figure 2 、 Figure 3 shown, a lens press-fitting device for a PM2.5 sensor includes a base 1, a lifting table 2 and a lifting execution mechanism 3.

[0052] The base 1 is provided with a product positioning groove 1.1 with an upward opening. The product positioning groove 1.1 is used to position the PM2.5 sensor product 12.

[0053] The lifting table 2 is provided with two mutually parallel lens pressing rods 4. In this embodiment, the lens pressing rod 4 is a spring ejector pin, which includes a sliding pressing rod 4.1 that can move up and down and a spring. The sliding pressing rod 4.1 moves downward under the action of the spring. The two lens pressing rods 4 are both located directly above the product positioning groove 1.1.

[0054] The lifting execution mechanism 3 drives the lifting table 2 to move up and down. The lifting execution mechanism 3 is a cylinder or an oil cylinder or an electric cylinder or an electric push rod. In this embodiment, the lifting execution mechanism 3 is a cylinder.

[0055] The specific use of the lens press-fitting device for a PM2.5 sensor in this embodiment is as follows.

[0056] The lifting actuator 3 drives the lifting platform 2 to move upward in place.

[0057] As Figure 4 shown, pre-load two lenses 13 into the lens card slots 14 of the PM2.5 sensor product 12. When pre-loading the lenses, only place the lenses in the lens card slots, and there is no need to press down the lenses.

[0058] As Figure 5 shown, place the PM2.5 sensor product 12 with pre-loaded lenses into the product positioning slot 1.1. At this time, the sliding rods 4.1 of the two lens pressing rods 4 are respectively located directly above the two lenses.

[0059] Next, the lifting actuator 3 drives the lifting platform 2 to descend until the lifting platform 2 moves downward in place. During this process, the lower end of the sliding rod 4.1 presses on the lens, pressing the lens downward until the lens is press-fitted in place. After that, during the process of the lifting platform 2 continuing to move downward, the sliding rod 4.1 moves upward against the spring force of the spring ejector pin until the lifting platform 2 moves downward in place, thus completing the press-fitting operation of the two lenses. During this process, since the lens pressing rod 4 is a spring ejector pin, there will be no rigid collision between the sliding rod 4.1 and the lens during the process of pressing down the lens, avoiding lens deformation and damage. Therefore, it is possible to avoid the problem of lens deformation and damage caused by the rigid collision between the sliding rod 4.1 and the lens when the lens is press-fitted in place.

[0060] In this embodiment, the lens press-fitting device is used to press-fit two lenses into the correct positions of the product at the same time, completing the lens press-fitting operation without manual press-fitting, ensuring the consistency of the press-fitting force, depth and direction during the lens press-fitting process; reducing the working intensity of the operators, and also reducing the operators' contact with the lenses, reducing lens contamination; the lenses will not be deformed, damaged or contaminated during the lens press-fitting process, and the lenses are press-fitted in place to keep the horizontal heights of the two lenses consistent. Therefore, it can effectively solve the problems of the lens not being press-fitted in place manually, lens deformation and damage, and contamination of the lens mirror surface.

[0061] Specific Embodiment 2, as Figure 1 , Figure 2 , Figure 3 shown, a lens press-fitting device for a PM2.5 sensor includes a base 1, a lifting platform 2, two limit sensors 5 and a lifting actuator 3.

[0062] The base 1 is provided with a product positioning slot 1.1 with an upward opening. The product positioning slot 1.1 is used to position the PM2.5 sensor product 12.

[0063] There are two mutually parallel lens pressing rods 4 provided on the lifting table 2. In this embodiment, the lens pressing rods 4 are spring-loaded pins, which include a sliding pressing rod 4.1 capable of moving up and down and a spring. The sliding pressing rod 4.1 moves downward under the action of the spring. The two lens pressing rods 4 are both located directly above the product positioning groove 1.1. In this embodiment, the sliding pressing rods are vertically distributed.

[0064] The lifting actuator 3 drives the lifting table 2 to move up and down. The lifting actuator 3 is a cylinder or an oil cylinder or an electric cylinder or an electric push rod. In this embodiment, the lifting actuator 3 is a cylinder.

[0065] Two limit sensors 5 are arranged on the lifting table 2, and the limit sensors 5 correspond to the lens pressing rods 4 one by one. The two limit sensors 5 are at the same height, and the limit sensors 5 are located above the corresponding sliding pressing rods 4.1.

[0066] When the lifting actuator 3 drives the lifting table 2 to move up in place, the lower ends of the sliding pressing rods 4.1 of the two lens pressing rods 4 are at the same height, and the upper ends of the sliding pressing rods 4.1 of the two lens pressing rods 4 are also at the same height.

[0067] When the lifting actuator 3 drives the lifting table 2 to move up in place, there is a set spacing in the height direction between the limit sensors 5 located between the corresponding sliding pressing rods 4.1.

[0068] The specific use of a lens pressing device for a PM2.5 sensor in this embodiment is as follows,

[0069] The lifting actuator 3 drives the lifting table 2 to move up in place;

[0070] As Figure 4 shown, two lenses 13 are pre-loaded into the lens card slots 14 of the PM2.5 sensor product 12. When pre-loading the lenses, it is only necessary to place the lenses in the lens card slots, and there is no need to press down the lenses;

[0071] As Figure 5 shown, the PM2.5 sensor product 12 pre-loaded with lenses is placed in the product positioning groove 1.1. At this time, the sliding pressing rods 4.1 of the two lens pressing rods 4 are respectively located directly above the two lenses;

[0072] Next, the lifting and lowering actuator 3 drives the lifting platform 2 to descend until the lifting platform 2 is in place after descending. During this process, the lower end of the sliding pressure rod 4.1 presses against the lens, pressing the lens downward until the lens is pressed in place (in this embodiment, before the lens is pressed in place, the sliding pressure rod 4.1 does not move upward under the action of the spring); thereafter, during the continuous downward movement of the lifting platform 2, the sliding pressure rod 4.1 moves upward against the spring force of the spring ejector pin until the lifting platform 2 is in place after descending, thus completing the pressing operation of the two lenses; during this process, since the lens pressing rod 4 is a spring ejector pin, during the process of the sliding pressure rod 4.1 pressing the lens downward, there will be no rigid collision between the sliding pressure rod 4.1 and the lens, avoiding lens deformation and damage. Therefore, when the lens is pressed in place, the problem of lens deformation and damage caused by the rigid collision between the sliding pressure rod 4.1 and the lens can be avoided.

[0073] In this embodiment, a lens pressing device is used to press two lenses onto the correct positions of the product simultaneously to complete the lens pressing operation, without manual pressing, ensuring the consistency of the pressing force, depth, and direction during the lens pressing process; reducing the working intensity of the operators and also reducing the operators' contact with the lenses, thereby reducing lens contamination; during the lens pressing process, the lenses do not deform, get damaged, or get contaminated, and the lenses are pressed in place so that the horizontal heights of the two lenses are kept consistent. Therefore, the problems of incomplete manual lens pressing, lens deformation and damage, and contamination of the lens surface can be effectively solved.

[0074] In addition, during the process of pressing the lens, when the lower end of the sliding pressure rod 4.1 presses against the lens and presses the lens downward in place, and then the lifting platform 2 continues to descend, during the process that the sliding pressure rod 4.1 moves upward against the spring force of the spring ejector pin, the lens pressing rod 4 will trigger the limit sensor 5. If the upper ends of the sliding pressure rods 4.1 of the two lens pressing rods 4 trigger the limit sensor 5 simultaneously, it means that after the lens pressing rod 4 presses the lens in place, the upper ends of the sliding pressure rods 4.1 of the two lens pressing rods 4 are at the same height. At this time, the horizontal heights of the two lenses are the same, and the lens pressing is qualified;

[0075] On the contrary, if the upper ends of the sliding pressure rods 4.1 of the two lens pressing rods 4 do not trigger the limit sensor 5 simultaneously (trigger the limit sensor 5 successively), it means that after the lens pressing rod 4 presses the lens in place, the upper ends of the sliding pressure rods 4.1 of the two lens pressing rods 4 are not at the same height. At this time, the horizontal heights of the two lenses are not the same, and the lens pressing is unqualified. The reasons for this situation may be that one of the lenses is not installed, or one of the lenses is stuck and not pressed in place, or there are problems with the manufacturing accuracy in the lens slot of the lens and the product itself; thus, it can be timely determined whether the lens pressing is qualified to ensure the product qualification rate. When the lens pressing is unqualified, rework is carried out. This can also effectively solve the problem of missing lens installation during manual lens pressing.

[0076] Specifically, as Figure 1 and Figure 2 shown, an upper frame 6 is further provided on the base 1. The upper frame 6 is located above the base 1. The lifting actuator 3 is installed on the upper frame 6.

[0077] A vertical guide rod 1.3 is provided on the base 1, and the vertical guide rod 1.3 connects the base 1 and the upper frame 6. The lifting table 2 moves up and down along the vertical guide rod 1.3. In this way, the stable lifting of the lifting table 2 is ensured, and thus the stable pressing of the lens by the lens pressing rod 4 is ensured.

[0078] In this embodiment, the lifting actuator 3 is a cylinder. The cylinder uses compressed air as the power source. Before the compressed air enters the cylinder, a pressure regulating valve is used to regulate the air source pressure to control the cylinder pressure and ensure stable pressure output.

[0079] In this embodiment, the spring ejector pin further includes an outer sleeve fixed on the lifting table 2, and the sliding pressing rod is slidably disposed within the outer sleeve, and the sliding pressing rod penetrates through the upper and lower ends of the outer sleeve.

[0080] Furthermore, as Figure 1 shown, the base 1 is further provided with a product positioning block 1.2. The product positioning block 1.2 is installed on the base 1 by bolts. A product positioning groove 1.1 is provided on the upper surface of the product positioning block 1.2. In this way, by replacing the product positioning block 1.2, the lens pressing of PM2.5 sensor products 12 with different model sizes and shapes can be adapted, improving the versatility of the lens pressing equipment.

[0081] In this embodiment, a positioning post is further provided on the bottom surface of the product positioning groove 1.1. In this way, the PM2.5 sensor product 12 is positioned by the product positioning groove 1.1 and the positioning post together. Of course, it should be noted that the positioning post may not be provided on the bottom surface of the product positioning groove 1.1, and the PM2.5 sensor product 12 may be positioned only by the product positioning groove 1.1.

[0082] In this embodiment, the product positioning groove 1.1 is rectangular. Of course, it should be noted that the product positioning groove 1.1 may also be other shapes matching the shape of the PM2.5 sensor product 12, such as a square or other special-shaped structures.

[0083] Furthermore, as Figure 1 and Figure 2As shown in the figure, a lens pressing device for a PM2.5 sensor further includes a limit switch 10 and a limit contact rod 11. One of the limit switch 10 and the limit contact rod 11 is arranged on the lifting table 2, and the other is arranged on the base 1. In this embodiment, the limit switch 10 is arranged on the top surface of the base 1, and the limit contact rod 11 is arranged on the lifting table 2. When the lifting actuator 3 drives the lifting table 2 to move down to the position in place, the limit contact rod 11 triggers the limit switch 10. Thus, when the limit contact rod 11 triggers the limit switch 10, it indicates that the lifting actuator 3 drives the lifting table 2 to move down to the position in place, and the lens pressing action is completed. In this embodiment, during the process of pressing the lens, when the limit contact rod 11 triggers the limit switch 10, it indicates that the lens is pressed to the predetermined position, and the lens pressing action is completed. At this time, the lifting actuator 3 automatically drives the lifting table 2 to rise and reset.

[0084] Further, as Figure 1 shown in the figure, a downward pressing button 7 is further arranged on the base 1. The downward pressing button 7 is used to control the lifting actuator 3 to drive the lifting table 2 to descend. In this embodiment, there are two downward pressing buttons 7. During actual operation, only when the operator presses the two downward pressing buttons 7 simultaneously can the lifting actuator 3 be controlled to drive the lifting table 2 to descend. Thus, it can avoid the safety hazard caused by the operator accidentally touching one of the downward pressing buttons 7 and controlling the lifting actuator 3 to drive the lifting table 2 to descend.

[0085] Of course, it should be noted that the downward pressing button 7 can also be set to one, and the lifting actuator 3 is controlled to drive the lifting table 2 to descend through one downward pressing button 7.

[0086] In this embodiment, a rising button 9 is further arranged on the base 1. The rising button 9 is used to control the lifting actuator 3 to drive the lifting table 2 to rise. This rising button 9 is mainly used for the debugging of the lens pressing device. In this embodiment, during the process of pressing the lens, when the limit contact rod 11 triggers the limit switch 10, it indicates that the lens is pressed to the predetermined position, and the lens pressing action is completed. At this time, the lifting actuator 3 automatically drives the lifting table 2 to rise and reset; there is no need to control the lifting actuator 3 to drive the lifting table 2 to rise through the rising button 9.

[0087] Further, as Figure 1 shown in the figure, a lens pressing device for a PM2.5 sensor further includes an indicator light 8 and a buzzer. In this embodiment, both the indicator light 8 and the buzzer are arranged on the base 1. Thus, the operator can be prompted whether the lens pressing is qualified through the indicator light 8 and the buzzer.

[0088] Specifically, during the process of the lifting actuator 3 driving the lifting platform 2 to move downward, if the upper ends of the sliding rods 4.1 of the two lens pressing rods 4 trigger the limit sensor 5 simultaneously, the indicator light 8 shows a green light and the buzzer does not sound; if the upper ends of the sliding rods 4.1 of the two lens pressing rods 4 do not trigger the limit sensor 5 simultaneously (for example, the upper end of one of the sliding rods 4.1 triggers the limit sensor 5 first), the indicator light 8 shows a red light and the buzzer sounds. In this way, the operator can be prompted by the indicator light 8 and the buzzer whether the lens pressing is qualified.

[0089] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent transformations made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A lens press-fitting device for a PM2.5 sensor, characterized in that: include: A base having a product positioning groove with an upward opening; A lifting platform is provided with two parallel lens pressure rods, which are spring pins and include a sliding pressure rod that can be lifted up and down, and the two lens pressure rods are located directly above the product positioning groove; The lifting actuator drives the lifting platform up and down.

2. According to claim 1, the lens pressing device for PM2.5 sensor is characterized in that: It also includes two limit sensors arranged on the lifting platform, the limit sensors correspond to the lens pressure rods one by one, the two limit sensors are located at the same height, and the limit sensors are located above the corresponding sliding pressure rods; When the lifting actuator drives the lifting platform to move to a position, the lower ends of the sliding pressing rods of the two lens pressing rods are located at the same height, and the upper ends of the sliding pressing rods of the two lens pressing rods are also located at the same height.

3. The lens pressing device for a PM2.5 sensor according to claim 2 is characterized in that: Also includes indicator light and buzzer.

4. The lens pressing device for a PM2.5 sensor according to claim 3 is characterized in that: When the lifting actuator drives the lifting platform to move downward, if the upper ends of the sliding pressure rods of the two lens pressure rods trigger the limit sensor at the same time, the indicator light will show green; if the upper ends of the sliding pressure rods of the two lens pressure rods do not trigger the limit sensor at the same time, the indicator light will show red and the buzzer will sound.

5. A lens pressing device for a PM2.5 sensor according to claim 1, 2, 3 or 4, characterized in that: It also includes a limit switch and a limit touch rod, one of the limit switch and the limit touch rod is arranged on the lifting platform, and the other is arranged on the base; when the lifting actuator drives the lifting platform to move down to the position, the limit touch rod triggers the limit switch.

6. A lens press-fitting device for a PM2.5 sensor according to claim 1, 2, 3 or 4, characterized in that: The base is also provided with a product positioning block, which is mounted on the base through bolts, and a product positioning groove is arranged on the upper surface of the product positioning block.

7. A lens pressing device for a PM2.5 sensor according to claim 1, 2, 3 or 4, characterized in that: A positioning column is also provided on the bottom surface of the product positioning groove.

8. A lens pressing device for a PM2.5 sensor according to claim 1, 2, 3 or 4, characterized in that: A vertical guide rod is arranged on the base, and the lifting platform moves up and down along the vertical guide rod.

9. A lens press-fitting device for a PM2.5 sensor according to claim 1, 2, 3 or 4, characterized in that: The base is also provided with an upper frame, which is located above the base, and a lifting actuator is installed on the upper frame. A push button is also provided on the base, and the push button controls the lifting actuator to drive the lifting platform to descend.

10. A lens press-fitting device for a PM2.5 sensor according to claim 1, 2, 3 or 4, characterized in that: The lifting actuator is a pneumatic cylinder, an electric cylinder or an electric push rod.

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