Visual inspection system

Abstract

The utility model discloses a visual inspection system. The visual inspection system comprises a movable adjusting platform, a supporting platform, a motion guiding assembly and a visual inspection assembly. A connecting assembly is arranged between the supporting platform and the movable adjusting platform, the supporting platform comprises a height adjusting assembly, and the height adjusting assembly drives the height of the movable adjusting platform to change so that the supporting platform and the movable adjusting platform can be connected or separated. The supporting platform is movably connected to the motion guiding assembly. The visual detection assembly comprises a camera. When the parts exceed the capturing range of the camera, the height adjusting assembly drives the height of the movable adjusting platform to change, so that the position of the movable adjusting platform is convenient to adjust, the parts loaded on the movable adjusting platform are located in the capturing range of the camera, and the accuracy of the visual inspection process is ensured; when the supporting platform is separated from the movable adjusting platform, the movable adjusting platform can be replaced conveniently, and tools for different parts can be arranged on the movable adjusting platform conveniently.

Description

Technical Field

[0001] The present application relates to the field of product inspection, and in particular to a visual inspection system. Background Art

[0002] At present, in order to improve the detection accuracy and efficiency of parts, some factories with a high degree of automation use visual inspection to inspect parts. In the visual inspection method, the parts need to be in a specified position to ensure that the image of the parts captured by the system can reflect the overall situation of the parts and avoid false detection and missed detection. However, factories often use manual cooperation with transfer vehicles to transport parts to the visual inspection position. The position accuracy of the parts is difficult to guarantee, and it is easy for part of the structure of the parts to be outside the range of the captured image. In addition, it is difficult to ensure the uniform position of multiple parts of the same model during their respective transportation processes.

[0003] In addition, when a conveying device with higher conveying accuracy is used to transport parts to the designated position for visual inspection, a structure for installing parts needs to be set on the conveying device. This structure is often integrated with the conveying device and is difficult to replace, or the replacement process is extremely complicated, which is not conducive to the system detecting numerous parts of multiple models and reduces the detection efficiency. Utility Model Content

[0004] In order to solve at least one of the above technical problems, the present application provides a visual inspection system, and the technical solution adopted is as follows:

[0005] The present application provides a visual inspection system, which includes a movable adjustment platform, a support platform, a motion guide component and a visual inspection component, wherein the movable adjustment platform is used to load parts; the support platform is used to support the movable adjustment platform, a connecting component is provided between the support platform and the movable adjustment platform, and the support platform and the movable adjustment platform are detachably connected through the connecting component, the support platform includes a height adjustment component, the height adjustment component includes a height adjustment driver connected to the movable adjustment platform, the height adjustment driver drives the movable adjustment platform to change its height so that the support platform and the movable adjustment platform are connected to each other or separated from each other; the support platform is movably connected to the motion guide component, and the support platform reciprocates between an inspection area and a loading area along the motion guide component; the visual inspection component includes an image capture component, the image capture component includes a camera, and the camera is used to capture images of parts in the inspection area.

[0006] In certain embodiments of the present application, the connecting assembly includes a first connecting component and a second connecting component, and the first connecting component and the second connecting component are respectively arranged on the movable adjustment platform and the supporting platform, and the height adjustment driver drives the first connecting component and the second connecting component to be plugged in or separated so that the first connecting component and the second connecting component can be detachably connected.

[0007] In certain embodiments of the present application, a position adjustment component is arranged between the support platform and the movable adjustment platform, and the position adjustment component includes a position adjustment power component and a first position adjustment component. The first position adjustment component and the position adjustment power component are respectively arranged on the movable adjustment platform and the support platform, and the position adjustment power component can contact and push the first position adjustment component.

[0008] In certain embodiments of the present application, the position adjustment power assembly includes a position adjustment driver and a second position adjustment component, and the position adjustment driver drives the second position adjustment component to contact and push the first position adjustment component.

[0009] In certain embodiments of the present application, the motion guide assembly includes a motion assembly and a guide assembly, the motion assembly is used to drive the support platform to move, and the guide assembly is used to guide the support platform to reciprocate between the detection area and the loading area.

[0010] In certain embodiments of the present application, the motion assembly includes a first rolling component, a motion driver and a motion track, the motion track extends from the detection area to the loading area, the motion driver is connected to the support platform, the first rolling component is connected to the motion driver and is in rolling contact with the motion track, and the motion driver drives the first rolling component to rotate so that the support platform moves along the motion track.

[0011] In certain embodiments of the present application, the motion guide component includes a first interference component, and the support platform includes a second interference component. The first interference component is arranged at the movement limit position of the support platform. When the support platform reaches the movement limit position, the first interference component contacts the second interference component.

[0012] In certain embodiments of the present application, the image capture component includes a shielding component, which is used to shield the camera. The shielding component includes a shielding driver and a shielding component, and the shielding driver drives the shielding component to cover the camera or avoid the camera.

[0013] In certain embodiments of the present application, the visual inspection component includes a bracket and a lighting component, the camera, the shielding component and the lighting component are all connected to the bracket, and the lighting component is used to provide lighting for the parts.

[0014] In some embodiments of the present application, the support platform includes a third resistance component, and the support platform contacts and pushes the movable adjustment platform through the third resistance component, so that the movable adjustment platform moves together with the support platform.

[0015] The embodiments of the present application have at least the following beneficial effects: In the present application, the support platform and the movable adjustment platform are interconnected and move to the loading area under the action of the motion guide component. After the parts are loaded onto the movable adjustment platform in the loading area, the motion guide component drives the support platform and the movable adjustment platform to move to the detection area, and the camera of the visual inspection component captures the image of the parts in the detection area to realize visual inspection of the parts; when the parts are beyond the capture range of the camera, the position of the parts needs to be adjusted, and the height adjustment component drives the height change of the movable adjustment platform to separate the support platform from the movable adjustment platform, which is convenient for adjusting the position of the movable adjustment platform, so that the parts loaded on the movable adjustment platform are within the capture range of the camera, thereby ensuring the accuracy of the visual inspection process; when the support platform is separated from the movable adjustment platform, it is convenient to replace the movable adjustment platform, and it is also convenient to set tooling for different parts on the movable adjustment platform, so that the visual inspection system is compatible with different parts.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a structural schematic diagram of the visual inspection system of the present application;

[0019] Figure 2 is a rear view of the visual inspection system of the present application after removing the visual inspection component;

[0020] Figure 3 is a side view of the visual inspection system of the present application;

[0021] Figure 4 This application is a visual inspection system Figure 3 Cross-sectional view of section AA;

[0022] Figure 5 This is the visual inspection system of this application Figure 4 A partial enlarged view of part I;

[0023] Figure 6 It is a front view of the visual inspection system of the present application after removing the visual inspection component;

[0024] Figure 7 It is a bottom view of the visual inspection component in the visual inspection system of the present application.

[0025] Reference numerals:

[0026] Movable adjustment platform 101; parts 102;

[0027] Support platform 201; height adjustment driver 202; height adjustment component 203; first connection component 204; second connection component 205; position adjustment driver 206; second position adjustment component 207; first position adjustment component 208; third abutment component 209;

[0028] First rolling component 301; motion driver 302; motion track 303; guide track 304;

[0029] Visual detection component 401; camera 402; shielding driver 403; shielding component 404; bracket 405; lighting component 406. DETAILED DESCRIPTION

[0030] This section will combine Figures 1 to 7 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application. The features defined as "first" and "second" are used to distinguish the feature names, rather than having special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this application can be understood according to specific circumstances.

[0033] like Figure 1 As shown, the embodiment of the present application provides a visual inspection system, which includes a movable adjustment platform 101, a support platform 201, a motion guide component and a visual inspection component 401. The motion guide component extends from the loading area to the inspection area, and the support platform 201 moves between the loading area and the inspection area along the motion guide component. At the same time, the support platform 201 drives the movable adjustment platform 101 to move together.

[0034] The movable adjustment platform 101 is used to place the parts 102 , and the movable adjustment platform 101 loads the parts 102 in the loading area by moving, and the movable adjustment platform 101 transports the parts 102 to the inspection area for visual inspection by moving.

[0035] Furthermore, the visual inspection component 401 captures the image of the component 102 in the inspection area, and analyzes and processes the image, thereby completing the visual inspection process.

[0036] like Figure 2 As shown, in some examples, the visual inspection component 401 is located on the top of the movable adjustment platform 101 . To ensure that the visual inspection component 401 can capture a complete image of the component 102 , the component 102 is disposed on the top of the movable adjustment platform 101 .

[0037] Among them, the top of the movable adjustment platform 101 is connected to the fixture of the component to be inspected, and the component 102 is positioned on the top of the movable adjustment platform 101 through the fixture to avoid position displacement of the component 102 on the top of the movable adjustment platform 101, thereby ensuring the accuracy of visual inspection and the movement consistency of multiple parts of the same specification after loading.

[0038] Specifically, the movable adjustment platform 101 is provided with a support portion extending toward the bottom, and the support portion is provided with a second rolling component. The second rolling component is in rolling contact with the ground, and provides support for the movable adjustment platform 101 without affecting the movement of the movable adjustment platform 101, thereby preventing the gravity of the movable adjustment platform 101, the fixture of the component to be inspected, and the component 102 from all acting on the support platform 201 and the motion guide assembly, thereby improving the durability of the system.

[0039] It is understandable that the second rolling component is a roller, and the support portion and the roller avoid the motion guide component, so as to prevent the support portion and the roller from interfering with the motion guide component during the movement of the movable adjustment platform 101.

[0040] In some examples, the support platform 201 is located at the bottom of the movable adjustment platform 101 and is used to support the movable adjustment platform 101 and drive the movable adjustment platform 101 to move between the loading area and the detection area.

[0041] Among them, a connection component is provided between the support platform 201 and the movable adjustment platform 101, and the support platform 201 and the movable adjustment platform 101 are detachably connected through the connection component. When the support platform 201 drives the movable adjustment platform 101 to move, the support platform 201 and the movable adjustment platform 101 are connected to each other; when the movable adjustment platform 101 reaches the detection area, if the component 102 exceeds the image capture range of the visual detection component 401, the support platform 201 and the movable adjustment platform 101 are separated, and the movable adjustment platform 101 performs position fine-tuning.

[0042] Further, the support platform 201 includes a height adjustment component, the height adjustment component includes a height adjustment driver 202, and the output end of the height adjustment driver 202 is connected to the movable adjustment platform 101, thereby driving the movable adjustment platform 101 to change the height relative to the support platform 201. The movable adjustment platform 101 can be connected to or separated from the support platform 201 during the height change process.

[0043] Specifically, the height adjustment assembly includes a height adjustment component 203, which is disposed at the output end of the height adjustment driver 202, and the output end of the height adjustment driver 202 contacts the movable adjustment platform 101 through the height adjustment component 203. The height adjustment driver 202 includes a structure capable of outputting linear motion, such as a cylinder, a hydraulic cylinder, and an electric push rod.

[0044] like Figure 2As shown, in some examples, the connecting component includes a first connecting component 204 and a second connecting component 205, the first connecting component 204 is arranged on the movable adjustment platform 101, and the second connecting component 205 is arranged on the supporting platform 201, and the first connecting component 204 and the second connecting component 205 are detachably connected, thereby realizing a detachable connection between the movable adjustment platform 101 and the supporting platform 201.

[0045] Furthermore, the first connecting part 204 and the second connecting part 205 are distributed up and down, and the first connecting part 204 and the second connecting part 205 are configured as "L-shaped" connecting blocks that fit together. When the height adjustment assembly drives the movable adjustment platform 101 to change its height relative to the supporting platform 201, the first connecting part 204 and the second connecting part 205 are separated from each other, or fit together.

[0046] Specifically, a plug-in assembly is arranged between the first connecting component 204 and the second connecting component 205, and the plug-in assembly includes a pin and a socket. The pin and the socket are respectively arranged on the first connecting component 204 and the second connecting component 205. When the first connecting component 204 and the second connecting component 205 are fitted with each other, the pin is inserted into the socket to lock the relative position between the movable adjustment platform 101 and the support platform 201.

[0047] like Figure 3 , Figure 4 and Figure 5 As shown, in some examples, a position adjustment component is provided between the support platform 201 and the movable adjustment platform 101. When the support platform 201 and the movable adjustment platform 101 are separated from each other by the height adjustment component, the position adjustment component can adjust the horizontal position of the movable adjustment platform 101 so that the parts 102 on the movable adjustment platform 101 are within the image capture range of the visual inspection component 401 during the visual inspection process. At the same time, when the movable adjustment platform 101 and the support platform 201 need to be connected to each other, the first connecting component 204 and the second connecting component 205 are in a position where they can fit together.

[0048] The position adjustment assembly includes a position adjustment power assembly and a first position adjustment component 208, and the first position adjustment component 208 and the position adjustment power assembly are respectively arranged on the movable adjustment platform 101 and the support platform 201. When the height adjustment assembly drives the movable adjustment platform 101 to separate from the support platform 201, the first position adjustment component 208 gradually moves into the movement path of the position adjustment power assembly. At this time, the position adjustment power assembly can contact and push the first position adjustment component 208 to achieve horizontal position adjustment of the movable adjustment platform 101.

[0049] In some examples, the position adjustment power assembly includes a position adjustment driver 206 and a second position adjustment component 207, and the second position adjustment component 207 is connected to the output end of the second position adjustment driver 206. The position adjustment driver 206 drives the second position adjustment component to gradually contact and push the first position adjustment component 208.

[0050] Specifically, the first position adjustment component 208 and the second position adjustment component 207 both adopt adjustment blocks, and the position adjustment driver 206 includes a structure capable of outputting linear motion, such as a cylinder, a hydraulic cylinder, and an electric push rod.

[0051] like Figure 6 As shown, in some examples, the support platform 201 includes a third abutment component 209. Under the premise that the movable adjustment platform 101 and the support platform 201 are separated from each other, the movement of the support platform 201 enables the third abutment component 209 to contact the movable adjustment platform 101, thereby driving the movable adjustment platform 101 to move. Then, the movable adjustment platform 101 and the support platform 201 can move together when they are connected or separated from each other. Specifically, the third abutment component 209 contacts the first connection component 204 or the second connection component 205 provided on the movable adjustment platform 101.

[0052] In some examples, the motion guide assembly drives the support platform 201 to move, and guides the movement of the support platform 201 between the detection area and the loading area. It can be understood that the motion guide assembly extends from the loading area to the detection area.

[0053] like Figure 1 and Figure 6 As shown, the motion guide assembly includes a motion assembly and a guide assembly, the motion assembly is used to drive the support platform 201 to move, and the guide assembly is used to limit the motion path of the support platform 201, so that the support platform 201 reciprocates between the detection area and the loading area.

[0054] In some examples, the motion assembly includes a first rolling component 301, a motion driver 302, and a motion track 303. The motion track 303 is fixedly arranged on the ground and extends from the loading area to the detection area, the motion driver 302 is connected to the support platform 201, and the output end of the motion driver 302 is connected to the first rolling component 301. At the same time, the first rolling component 301 is in rolling contact with the motion track 303, and the motion driver 302 drives the first rolling component 301 to rotate so that the support platform 201 can move along the motion track 303.

[0055] Specifically, the first rolling component 301 is in rolling contact with the moving track 303 at the side of the moving track 303 , the first rolling component 301 includes a roller, and the motion driver 302 includes a structure that outputs rotational motion, such as a motor.

[0056] Furthermore, the guide assembly includes a guide rail 304 and a slider. A plurality of guide rails 304 can be provided to ensure the movement stability of the support platform 201. When two guide rails 304 are provided, the two guide rails 304 are respectively provided on both sides of the motion rail 303, and the guide rails 304 are provided on the ground and extend from the loading area to the detection area. The slider is fixedly provided on the support platform 201 and is engaged with the guide rail 304.

[0057] In some examples, in order to limit the movement limit position of the support platform 201, the motion guide assembly includes a first interference assembly, and the support platform 201 includes a second interference assembly. The first interference assembly is arranged at the limit position of the support platform 201, and includes a plurality of first interference components and a power interference component. The second interference assembly includes a plurality of second interference components, and the position of each second interference component corresponds to the position of each first interference component and the power interference component. It can be understood that the first interference assembly is arranged at the limit position of the loading area and the detection area, and the second interference assembly is also arranged on the front and rear sides of the support platform 201. When the support platform 201 moves to the limit position, the first interference assembly contacts the second interference assembly to prevent the support platform 201 from overtravel.

[0058] The power resistance component includes an initial motion driver, and when the second resistance component needs to be separated from the power resistance component, the output end of the initial motion driver pushes the second resistance component to provide the support platform 201 with initial power for movement, which is beneficial to the subsequent movement of the support platform 201. Specifically, the initial motion driver includes a structure that outputs linear motion, such as a cylinder, a hydraulic cylinder, and an electric push rod.

[0059] In some examples, the visual inspection component 401 includes an image capture component, which includes a camera 402 , and the camera 402 is used to capture the component 102 in the inspection area and transmit the image to a corresponding processing device, thereby completing the visual inspection of the component 102 .

[0060] like Figure 7 As shown, in some examples, the image capture component includes a shielding component, and when the camera 402 is idle, the shielding component is used to shield the camera 402 to prevent the camera 402 from accumulating dust and preventing the dust from affecting the subsequently captured images.

[0061] The shielding assembly includes a shielding driver 403 and a shielding component 404. The shielding component 404 is formed into a sheet structure and is connected to the output end of the shielding driver 403. The shielding driver 403 drives the shielding component 404 to cover the camera 402 or avoid the camera 402.

[0062] In some examples, in order to ensure that the camera 402 has a sufficiently large image capture range, the camera 402 needs to have a certain distance from the movable adjustment platform 101. Therefore, the visual detection component 401 includes a bracket 405. When the camera 402 is at the top of the movable adjustment platform 101, the bracket 405 with a certain height extends to the top of the movable adjustment platform 101, and the image capture component is set on the bracket 405.

[0063] Furthermore, the visual inspection component 401 includes a lighting component 406, which is connected to the bracket 405 and provides lighting for the component 102 to ensure that the image captured by the camera 402 has sufficient clarity.

[0064] In the actual implementation process, the support platform 201 and the movable adjustment platform 101 are interconnected, and driven by the motion component to reach the limit position of the loading area, and the component 102 is positioned in the fixture of the movable adjustment platform 101. After the component 102 is loaded, the motion component drives the support platform 201 and the movable adjustment platform 101 to reach the limit position of the detection area. When the component 102 is in the image capture range of the visual inspection component 401, the camera 402 captures the image of the component 102, and the corresponding structure processes and identifies the image to detect whether the component 102 has defects such as missing screws. When the component 102 exceeds the image capture range of the visual inspection component 401, the height adjustment component drives the movable adjustment platform 101 to change its height relative to the support platform 201, so that the two are separated from each other, and the adjustment component takes effect. The adjustment component adjusts the horizontal position of the movable adjustment platform 101 to ensure that the component 102 falls completely within the image capture range to achieve visual inspection. During the process of assembling the movable adjustment platform 101 on the supporting platform 201, the first connecting component 204 and the second connecting component 205 need to be in a position where they can fit together. At this time, the horizontal position of the movable adjustment platform 101 can be adjusted by adjusting the assembly so that the first connecting component 204 and the second connecting component 205 correspond to each other, and then the height adjustment assembly drives the movable adjustment platform 101 to be installed on the top of the supporting platform 201.

[0065] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A visual inspection system, characterized in that: include: A movable adjustment platform, wherein the movable adjustment platform is used for loading components; A supporting platform, the supporting platform is used to support the movable adjustment platform, a connecting assembly is provided between the supporting platform and the movable adjustment platform, the supporting platform and the movable adjustment platform are detachably connected through the connecting assembly, the supporting platform comprises a height adjustment assembly, the height adjustment assembly comprises a height adjustment driver connected to the movable adjustment platform, the height adjustment driver drives the movable adjustment platform to change its height, so that the supporting platform and the movable adjustment platform are connected to each other, or separated from each other; A motion guide assembly, the support platform is movably connected to the motion guide assembly, and the support platform reciprocates between the detection area and the loading area along the motion guide assembly; A visual inspection component, wherein the visual inspection component includes an image capture component, and the image capture component includes a camera, and the camera is used to capture images of parts in the inspection area.

2. The visual inspection system according to claim 1, characterized in that: The connecting component includes a first connecting component and a second connecting component, and the first connecting component and the second connecting component are respectively arranged on the movable adjustment platform and the supporting platform. The height adjustment driver drives the first connecting component and the second connecting component to be plugged in or separated so that the first connecting component and the second connecting component can be detachably connected.

3. The visual inspection system according to claim 1, characterized in that: A position adjustment component is arranged between the support platform and the movable adjustment platform, and the position adjustment component includes a position adjustment power component and a first position adjustment component. The first position adjustment component and the position adjustment power component are respectively arranged on the movable adjustment platform and the support platform, and the position adjustment power component can contact and push the first position adjustment component.

4. The visual inspection system according to claim 3, characterized in that: The position adjustment power assembly includes a position adjustment driver and a second position adjustment component, and the position adjustment driver drives the second position adjustment component to contact and push the first position adjustment component.

5. The visual inspection system according to claim 1, characterized in that: The motion guide assembly includes a motion assembly and a guide assembly. The motion assembly is used to drive the support platform to move, and the guide assembly is used to guide the support platform to reciprocate between the detection area and the loading area.

6. The visual inspection system according to claim 5, characterized in that: The motion assembly includes a first rolling component, a motion driver and a motion track, wherein the motion track extends from the detection area to the loading area, the motion driver is connected to the support platform, the first rolling component is connected to the motion driver and is in rolling contact with the motion track, and the motion driver drives the first rolling component to rotate so that the support platform moves along the motion track.

7. The visual inspection system according to claim 5, characterized in that: The motion guide component includes a first interference component, and the support platform includes a second interference component. The first interference component is arranged at the movement limit position of the support platform. When the support platform reaches the movement limit position, the first interference component contacts the second interference component.

8. The visual inspection system according to claim 1, characterized in that: The image capture component includes a shielding component, and the shielding component is used to shield the camera. The shielding component includes a shielding driver and a shielding part. The shielding driver drives the shielding part to cover the camera or avoid the camera.

9. The visual inspection system according to claim 8, characterized in that: The visual inspection component includes a bracket and a lighting component. The camera, the shielding component and the lighting component are all connected to the bracket. The lighting component is used to provide lighting for the parts.

10. The visual inspection system according to claim 1 or 2, characterized in that: The support platform comprises a third resistance component, and the support platform contacts and pushes the movable adjustment platform through the third resistance component, so that the movable adjustment platform moves together with the support platform.

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