Bathroom mirror surface flatness detection equipment

Abstract

The invention discloses bathroom mirror surface flatness detection equipment, and relates to the technical field of flatness detection, the equipment comprises a bottom plate, a stand column, an insertion pipe and a suction cup, the insertion pipe is pressed down through the dead weight of a mirror body, a piston and a sealing mechanism are driven to form negative pressure, and the suction cup adsorbs and fixes the mirror body; meanwhile, the piston moves to disconnect the circuit, the electromagnet loses power, the detection base is released, a touch detection head connected through a spring rod is arranged in the detection base, and the touch detection head automatically bounces to make contact with the mirror surface after the magnetic attraction piece loses magnetic force. An operator can manually slide the detection seat, the tactile sensor slides on the mirror surface and the smooth surface to collect data, and the flatness result is displayed in real time in cooperation with an instrument. When the endoscope body is taken down, the intubation tube is continuously pressed down to deform the sealing ring, the internal ventilation structure is triggered to communicate with the air channel, negative pressure is relieved, and convenient disassembly is achieved. The method takes touch sensing as a core, is ingenious in structure, is simple and convenient to operate, and is suitable for bathroom mirror batch spot check scenes sensitive to cost.

Description

Technical Field

[0001] This invention relates to flatness testing technology, specifically a device for testing the flatness of a bathroom mirror surface. Background Technology

[0002] As is well known, in the field of mirror manufacturing, especially in the production of large-area glass mirrors such as bathroom mirrors, mirror flatness is a crucial indicator of product quality. Traditional mirror flatness testing largely relies on manual visual inspection or the use of high-precision equipment such as optical interferometers and laser scanners. In recent years, research has also explored the introduction of sensor technology for automated inspection. Among these methods, tactile sensor-based detection methods have gained increasing attention due to their direct contact, high sensitivity, and low cost. These methods involve sliding a tactile probe against the mirror surface to collect real-time data on surface deformation or height changes, thereby assessing flatness.

[0003] The shortcomings of existing technologies lie in the significant deficiencies of current tactile sensor-based inspection equipment. Firstly, most devices are complex in structure, requiring external power supplies, air sources, or precision drive mechanisms, making them unsuitable for rapid sampling inspections on production lines. Secondly, the tactile detection head is often affected by clamping forces or electromagnetic interference, leading to unstable contact pressure and impacting detection repeatability and accuracy. Furthermore, the mirror mounting and dismounting process is cumbersome and lacks a linkage design with the detection action, reducing overall efficiency. Therefore, there is an urgent need for a mirror flatness inspection device that is simple in structure, easy to operate, can automatically trigger detection, and ensures stable and reliable tactile sensing to meet the demands of low-cost, high-efficiency batch quality inspection. Summary of the Invention

[0004] The purpose of this invention is to provide a bathroom mirror surface flatness testing device to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: comprising: a base plate, wherein columns are disposed at the four corners of the base plate surface, and insert tubes are movably inserted into the columns, with suction cups disposed at the top of the insert tubes; further comprising:

[0006] The piston is fixedly connected to the bottom end of the insertion tube and movably inserted into the column.

[0007] A sealing groove is formed on the outer periphery of the piston;

[0008] A sealing ring, wherein the sealing ring is rolled and fitted into the sealing groove;

[0009] A sealing mechanism is installed inside a sealing ring. The sealing mechanism is connected to a drive tube. When the microscope body placed on the suction cup surface is pressed downward by its own weight, the sealing mechanism drives the sealing ring to seal the space between the bottom of the column and the piston and form a negative pressure. The suction cup uses the negative pressure to adsorb and fix the microscope body. At the same time, when the microscope body is removed, the drive tube drives the sealing mechanism to passively cancel the seal of the sealing ring.

[0010] As a further description of the above technical solution: the bottom of the column is connected to the lower end face of the piston through a limiting spring, the upper end face of the piston is fixedly connected to the bottom end of the insertion tube, the top end of the insertion tube is fixedly connected to a suction cup, and the suction cup, insertion tube, and piston are provided with interconnected air holes.

[0011] As a further description of the above technical solution: the sealing mechanism includes support balls evenly spaced within the sealing ring, and multiple sets of insertion holes symmetrically opened on the outer periphery of the support balls. A support rod is movably and sealed into the insertion hole through a sealing ring. A through hole is opened at the connection point of the support rod to the sealing ring, and a sealing cover is provided on the outer periphery of one end of the support rod inserted into the insertion hole.

[0012] As a further description of the above technical solution: a vent plate is provided between the sliding connection sealing ring of the support rod and the sealing cover, and the vent plate is connected to the through hole and continuously held in the insertion hole.

[0013] As a further description of the above technical solution: a limiting ring is provided inside the socket, the limiting ring is inclined at a large angle toward the opening end of the socket, and the limiting ring is inclined at a small angle toward the inner end of the socket.

[0014] As a further description of the above technical solution: a breathable plate that connects to the inside of the support ball is provided at the end of the limiting ring inside the insertion hole.

[0015] As a further description of the above technical solution: the piston has electrical sleeves on both sides of its upper end face, and electrical rods are movably inserted into the electrical sleeves. The electrical rods are correspondingly arranged on both sides of the inner side wall of the top of the column. The electrical sleeves and electrical rods are electrically connected to the electromagnet in the base plate and the external power supply, respectively. The electromagnet in the base plate is magnetically connected to a magnetic absorbing plate, and the magnetic absorbing plate is movably arranged at the bottom of the detection seat.

[0016] As a further description of the above technical solution: the detection seat has a slide rail with a smaller upper dimension and a larger lower dimension. A magnetic absorbing piece is slidably connected in the slide rail. The outer peripheral dimension of the magnetic absorbing piece is adapted to the smaller dimension at the top of the slide rail. The surface of the magnetic absorbing piece is connected to the inner wall of the top of the slide rail through a spring rod. The center position of the spring rod on the surface of the magnetic absorbing piece is connected to the bottom end of the tactile detection head. The top end of the tactile detection head is movably inserted into the top of the detection seat.

[0017] As a further description of the above technical solution: the sealing cover is conical, and the larger end of the sealing cover slides and seals against the inner wall of the insertion hole, and the sealing cover itself has a spring-loaded deformation capability.

[0018] As a further description of the above technical solution: there is a gap between the initial position of the sealing cover and the limiting ring.

[0019] In the above technical solution, the bathroom mirror surface flatness testing device provided by the present invention has the following beneficial effects:

[0020] 1. Simple and efficient testing operation: The adsorption and testing mechanism are triggered by the weight of the microscope body, which does not require an external power supply or complex control. The test can be completed by manual sliding, which is suitable for rapid on-site sampling.

[0021] 2. Automatic release and reset mechanism: The piston movement control circuit is turned on and off, so that the electromagnet is automatically de-energized after the adsorption is completed, releasing the detection seat and ensuring that the detection process is not affected by magnetic interference, thus improving the consistency of detection.

[0022] 3. Accurate and reliable tactile sensing: The tactile sensing head, connected by a spring rod, directly contacts the mirror surface and collects surface undulation data in real time during the sliding process. Combined with the instrument display, it enables an intuitive and accurate assessment of the mirror surface flatness.

[0023] 4. Convenient disassembly and assembly of the microscope body: By continuing to press down the insertion tube to trigger the internal ventilation structure, the negative pressure of the suction cup can be quickly released, enabling non-destructive and rapid disassembly of the microscope body and improving testing efficiency.

[0024] 5. Compact structure and low cost: The whole structure adopts mechanical linkage and simple air circuit design, which does not require high-precision optical or electronic components, making it suitable for cost-sensitive mass production of bathroom mirrors. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the column provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram showing the disassembled structure of the column, tube, piston, and sealing ring provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the piston structure provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the sealing ring provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the support ball provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the socket structure provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the detection seat provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Base plate; 2-Detection seat; 3-Column; 4-Insertion tube; 5-Suction cup; 6-Mirror body; 7-Limiting spring; 8-Sealing ring; 9-Sealing groove; 10-Piston; 11-Electrical sleeve; 12-Electrical rod; 13-Air hole; 14-Support ball; 15-Support rod; 16-Insertion hole; 17-Sealing cover; 18-Limiting ring; 19-Tactile detection head; 20-Slide rail; 21-Spring rod; 22-Magnetic suction piece; 23-Ventilation plate; 24-Sealing ring; 25-Through hole. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Please see Figures 1-8 This invention provides a technical solution for a bathroom mirror surface flatness testing device, comprising: a base plate 1, with columns 3 arranged at the four corners of the base plate 1, inserting tubes 4 movably connected inside the columns 3, and a suction cup 5 at the top of the inserting tubes 4; and further comprising:

[0038] Piston 10 is fixedly connected to the bottom end of the insertion tube 4 and movably inserted into the column 3.

[0039] Sealing groove 9 is formed on the outer periphery of piston 10;

[0040] The sealing ring 8 is rolled and fitted into the sealing groove 9.

[0041] The sealing mechanism is located inside the sealing ring 8. The sealing mechanism is connected to the insertion tube 4. When the microscope body 6, placed on the surface of the suction cup 5, presses the insertion tube 4 downwards by its own weight, the sealing mechanism drives the sealing ring 8 to seal the bottom of the column 3 and the piston 10 and form a negative pressure. The suction cup 5 uses the negative pressure to adsorb and fix the microscope body 6. At the same time, when the microscope body 6 is removed, the insertion tube 4 drives the sealing mechanism to passively cancel the seal of the sealing ring 8.

[0042] In another embodiment of the present invention, preferably, the bottom of the column 3 is connected to the lower end face of the piston 10 by a limiting spring 7, the upper end face of the piston 10 is fixedly connected to the bottom end of the insertion tube 4, the top end of the insertion tube 4 is fixedly connected to the suction cup 5, and the suction cup 5, the insertion tube 4, and the piston 10 are provided with interconnected air holes 13.

[0043] In another embodiment of the present invention, the sealing mechanism includes support balls 14 evenly spaced within the sealing ring 8. Multiple sets of insertion holes 16 are symmetrically opened on the outer periphery of the support balls 14. A support rod 15 is movably and sealed into the insertion hole 16 through a sealing ring 24. A through hole 25 is opened at the connection point of the support rod 15 to the sealing ring 8. A sealing cover 17 is provided on the outer periphery of one end of the support rod 15 inserted into the insertion hole 16.

[0044] In another embodiment of the present invention, a vent plate 23 is provided between the support rod 15 and the sealing ring 24 and the sealing cover 17. The vent plate 23 is connected to the through hole 25 and is continuously held in the insertion hole 16.

[0045] In another embodiment of the present invention, a limiting ring 18 is provided inside the socket 16. The limiting ring 18 is inclined at a large angle toward the opening end of the socket 16 and at a small angle toward the inner end of the socket 16.

[0046] In another embodiment of the present invention, a breathable plate 23 communicating with the interior of the support ball 14 is provided inside the insertion hole 16 at the end of the limiting ring 18.

[0047] In another embodiment of the present invention, an electrical receiving sleeve 11 is provided on both sides of the upper end face of the piston 10, and an electrical receiving rod 12 is movably inserted into the electrical receiving sleeve 11. The electrical receiving rod 12 is correspondingly provided on both sides of the inner side wall of the top of the column 3. The electrical receiving sleeve 11 and the electrical receiving rod 12 are electrically connected to the electromagnet in the base plate 1 and the external power supply, respectively. The electromagnet in the base plate 1 is magnetically connected to the magnetic absorbing piece 22, and the magnetic absorbing piece 22 is movably provided at the bottom of the detection seat 2.

[0048] In another embodiment of the present invention, a slide rail 20 with a smaller upper size and a larger lower size is provided in the detection seat 2. A magnetic suction piece 22 is slidably connected in the slide rail 20. The outer peripheral size of the magnetic suction piece 22 is adapted to the size of the smaller upper size of the slide rail 20. The surface of the magnetic suction piece 22 is connected to the inner wall of the top of the slide rail 20 through a spring rod 21. The center of the spring rod 21 on the surface of the magnetic suction piece 22 is connected to the bottom end of the tactile detection head 19. The top end of the tactile detection head 19 is movably inserted into the top of the detection seat 2.

[0049] In another embodiment of the present invention, the sealing cover 17 is conical, and the larger end of the sealing cover 17 slides and seals against the inner wall of the insertion hole 16. The sealing cover 17 itself has a spring-loaded deformation capability.

[0050] In another embodiment of the present invention, preferably, there is a gap between the initial position of the sealing cover 17 and the limiting ring 18.

[0051] After the bathroom mirror is manufactured, it is generally necessary to conduct a sampling inspection on the flatness of its surface. However, since bathroom mirrors are considered furniture, the flatness requirements for bathroom mirrors used in furniture are relatively lenient. Furthermore, the inspection of each batch of bathroom mirrors usually involves taking a small amount of glass for testing. Therefore, considering factors such as production costs, a tactile sensor can be used to inspect the flatness of the bathroom mirror surface.

[0052] The flatness test of a bathroom mirror involves the following steps:

[0053] Step 1: Place the bathroom mirror on the testing equipment, specifically:

[0054] After the bathroom mirror to be inspected is removed from the production line, place it above the inspection equipment with the smooth side facing down and the rough side facing up. At this time, the four corners of the smooth side of the mirror body 6 will contact the suction cup 5, and the suction cup 5 will press down on the insertion tube 4, inserting the insertion tube 4 into the column 3 and pressing the limiting spring 7 until the rebound force of the limiting spring 7 of the mirror body 6 and the weight of the mirror body 6 reach the balance point. At this time, the mirror body 6 reaches the inspection position.

[0055] During this process, as the microscope body 6 contacts the suction cup 5 and presses the insertion tube 4 downward, the insertion tube 4 is inserted into the bottom end of the column 3. At this time, the electrical sleeves 11 on both sides of the upper end face of the piston 10 fixedly connected to the bottom end of the insertion tube 4 and the electrical rods 12 on the side wall of the upper end face inside the column 3 are separated from each other. The electrical sleeves 11 and the electrical rods 12 are electrically connected to the electromagnet in the base plate 1 and the external power supply, respectively. After the electrical sleeves 11 and the electrical rods 12 are separated, the electromagnet in the base plate 1 is de-energized and loses its magnetic attraction to the magnetic suction piece 22 at the bottom of the detection seat 2. At this time, the detection seat 2 can slide on the surface of the base plate 1 to detect the flatness of the light surface facing down of the microscope body 6.

[0056] Simultaneously, as the insertion tube 4 continues to be inserted into the column 3, the piston 10 moves downward within the column 3. During this movement, the sealing ring 8, which is fitted onto the bottom of the outer periphery of the sealing groove 9 in the middle of the piston 10, gradually rolls towards the upper end of the sealing groove 9 due to the downward movement of the piston 10. The downward movement of the piston 10 causes the air at the bottom of the column 3 to be discharged outward from the air hole 13 at the bottom of the piston 10, connecting the insertion tube 4 and the center of the suction cup 5. During this venting, the suction cup 5 will create a gap between itself and the smooth surface of the mirror body 6 due to the compression of the gas. After the mirror body 6 comes to a stop, the piston 10 will no longer compress the gas at the bottom of the column 3. Furthermore, since a significant portion of the air between the bottom of the column 3 and the piston 10 has been discharged, and the suction cup 5 is also sealed by the smooth surface of the mirror body 6, a certain negative pressure will be formed between the space between the bottom of the column 3 and the piston 10 and the suction cup 5. At this time, the negative pressure in the suction cup 5 is used to adhere and fix the mirror body 6.

[0057] Step 2: Perform a flatness test on the smooth surface of mirror body 6, specifically:

[0058] After the mirror body 6 is fixed, since the electromagnet in the base plate 1 has been de-energized in the first step, it loses its attraction and limitation on the magnetic suction plate 22 set at the bottom of the detection seat 2. At this time, the detection seat 2 can be grasped by hand and slid on the surface of the base plate 1 in all directions. The flatness of the mirror body 6 can be detected by the sliding of the tactile detection head 19 in contact with the smooth surface of the mirror body 6.

[0059] After the magnetic attractant 22 loses its magnetic attraction, the spring rod 21 connected to the magnetic attractant 22, after being stretched, loses its tension and springs back to its original position. The bottom end of the spring rod 21 is connected to the magnetic attractant 22, and the top end is connected to the inner side wall of the top of the slide 20 opened at the bottom of the detection base 2. The upper end of the magnetic attractant 22 is fixedly connected to the bottom end of the tactile detection head 19. At this time, during the upward rebound of the spring rod 21, the magnetic attractant 22 is pulled upward, thereby raising the tactile detection head 19 from the slide 20. Figure 8From left to right (initial magnetic attraction position, rising stage position, detection state position), raise the detection head upwards to the specified height, and combine this with the attached... Figure 8 As shown, the slide 20 is smaller at the top and larger at the bottom, and the size of the upper end of the slide 20 is adapted to the size of the magnetic chuck 22. When the magnetic chuck 22 reaches the bottom of the slide 20 with a smaller size, the highest point of the tactile detection head 19 is slightly lower than the highest point of the detection seat 2. The advantage of this design is that when the spring rod 21 rebounds upward, since the larger size of the slide 20 does not obstruct or limit the magnetic chuck 22, the tactile detection head 19 will rise and impact upward at a relatively fast speed. If the tactile detection head 19 is directly impacted above the height of the detection seat 2, it may cause the tactile detection head 19 to directly hit the light surface of the mirror body 6 being tested, resulting in damage to the mirror surface of the mirror body 6 or even the tactile detection head 19. However, if the slide 20 is set to a small size that is adapted to the size of the magnetic chuck 22, it will restrict the upward rebound of the spring rod 21, which may prevent the tactile detection head 19 from breaking through the highest point of the detection seat 2 and thus from contacting the light surface of the mirror body 6 for testing.

[0060] The tactile detection head 19 slides horizontally at different positions on the smooth surface of the mirror body 6 based on the tactile sensor, thereby detecting the flatness of the smooth surface of the mirror body 6, and in conjunction with the flatness instrument, the detection results are directly displayed on the detection device.

[0061] Step 3: After the inspection is completed, remove the microscope body 6 from the inspection equipment; specifically:

[0062] When the microscope body 6 needs to be removed after the inspection, due to the negative pressure formed between the suction cup 5 and the smooth surface of the microscope body 6, it is impossible to directly remove the microscope body 6 from the suction cup 5. It is necessary to continue pressing the microscope body 6 downwards, and continue to drive the insertion tube 4 to insert the piston 10 into the bottom of the column 3. At this time, even if a gap is formed between the suction cup 5 and the microscope body 6 to release air, the microscope body 6 is in a downward pressing state and cannot be removed upwards. Therefore, it is necessary to continue pressing the microscope body 6 downwards until the sealing ring 8 fitted on the outer periphery of the piston 10 reaches the top of the sealing groove 9 and separates the sealing ring 8 from the top of the sealing groove 9. At this time, because the gap between the sealing groove 9 and the inner wall of the column 3 is large, the sealing ring 8 will only roll and seal on the outer periphery of the sealing groove 9. After the sealing ring 8 rolls upwards and is separated from the sealing groove 9, the gap between the outer periphery of the piston 10 and the outer periphery of the column 3 is small, so it will squeeze the two sides of the sealing ring 8. Figure 3 , 5 As shown in 6 and 7, the O-shaped sealing ring 8 is squeezed into an elliptical shape, and the outer periphery of the piston 10 and the inner wall of the column 3 are used to squeeze the support rod 15, which is located in the sealing ring 8, into the support ball 14.

[0063] Because multiple sets of support balls 14 are evenly spaced at the center of the sealing ring 8 and connected to support rods 15, one end of the support rod 15 is movably inserted into the insertion hole 16 opened in the support ball 14. One end of the support rod 15 is provided with a tapered, outwardly expanding sealing cover 17, and a corresponding limiting ring 18 is provided in the insertion hole 16. In the initial state, the sealing cover 17 and the limiting ring 18 are separated by a certain distance, and a sliding seal is formed between the sealing cover 17 and the insertion hole 16. After the sealing ring 8 is rolled to the position that breaks through the sealing groove 9, the support rods 15 at both ends are inserted into the support balls 14. When the support rod 15 is inserted into the insertion hole 16, the sealing cover 17 first contacts the limiting ring 18, and then... Figure 7 As shown in the enlarged view of the limiting ring 18, the end of the limiting ring 18 facing the sealing cover 17 is inclined at a larger angle, while the end of the limiting ring 18 away from the sealing cover 17 is inclined at a smaller angle. Therefore, the sealing cover 17 first contacts the end of the limiting ring 18 with the larger inclined angle, which can provide a certain resistance to the insertion of the sealing cover 17. A large force needs to be pressed on the piston 10 to provide a large force to overcome the resistance when the support rod 15 is inserted into the insertion hole 16. After being squeezed by a large force, the sealing cover 17 retracts inward along the inclined edge of the limiting ring 18 and is inserted deeper into the insertion hole 16. At this time, the limiting ring 18 is inclined at a smaller angle. The vent plate 23 at the end of the position ring 18 allows air to pass through the inside of the sealing ring 8. The gas can also pass through the through hole 25 at the position of the sealing ring 8 to the inside of the support rod 15, which is connected to the support rod 15. The gas flow direction is as follows: outside → space formed by the upper end of the column 3 and the top of the piston 10 → through hole 25 on the surface of the sealing ring 8 → vent plate 23 between the sealing cover 17 and the sealing ring 24 on the surface of the support rod 15 → insertion hole 16 → inside the support ball 14 → insertion hole 16 → space formed by the lower end of the column 3 and the bottom of the piston 10 → through hole 25.

[0064] When the sealing ring 8 is not compressed into an O-shape, the through hole 25 inside the support rod 15 will be blocked by the sealing ring 24 and the sealing cover 17, and the gas cannot pass through the sealing ring 8 to form a flow. Therefore, even if the sealing ring 8 has a through hole 25 on its surface, it can still form a sealed state. The sealing ring 24 is set at the opening of the insertion hole 16 and forms a sliding seal with the support rod 15, which does not affect the insertion and removal of the support rod 15 while maintaining a seal.

[0065] After forming a gas flow channel inside the sealing ring 8, air flow is achieved in the space formed between the bottom of the column 3 and the lower end of the piston 10, which cancels the negative pressure state between the suction cup 5 and the mirror body 6, allowing the mirror body 6 to be removed. At this time, the limit spring 7 rebounds and pushes the piston 10 from bottom to top, and resets the sealing ring 8 back into the sealing groove 9 for rolling seal. At this time, the through hole 25 in the suction cup 5 is open, and there is no restriction on the upward reset of the insertion tube 4.

[0066] The advantage of this design is that the sealing ring 8 can switch freely between rolling sealing and venting. The sealing ring 8 can provide both sealing and ventilation.

[0067] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for testing the flatness of a bathroom mirror surface, comprising: A base plate (1), wherein four corner posts (3) are provided on the surface of the base plate (1), and insert tubes (4) are movably inserted into the posts (3), and suction cups (5) are provided at the top of the insert tubes (4); characterized in that it further includes: Piston (10), which is fixedly connected to the bottom end of the insertion tube (4) and movably inserted into the column (3). A sealing groove (9) is formed on the outer periphery of the piston (10); A sealing ring (8) is rolled and fitted inside a sealing groove (9); The sealing mechanism is set inside the sealing ring (8). The sealing mechanism is connected to the insertion tube (4). When the mirror body (6) placed on the surface of the suction cup (5) is pressed downward by its own weight against the insertion tube (4), the sealing mechanism drives the sealing ring (8) to seal between the bottom of the column (3) and the piston (10) and form a negative pressure. The suction cup (5) uses the negative pressure to adsorb and fix the mirror body (6). At the same time, when the mirror body (6) is removed, the insertion tube (4) drives the sealing mechanism to passively cancel the seal of the sealing ring (8).

2. The bathroom mirror surface flatness testing device according to claim 1, characterized in that, The bottom of the column (3) is connected to the lower end face of the piston (10) by a limiting spring (7). The upper end face of the piston (10) is fixedly connected to the bottom end of the insertion tube (4). The top end of the insertion tube (4) is fixedly connected to the suction cup (5). The suction cup (5), the insertion tube (4), and the piston (10) are provided with interconnected air holes (13).

3. The bathroom mirror surface flatness testing device according to claim 2, characterized in that, The sealing mechanism includes support balls (14) evenly spaced within the sealing ring (8). Multiple sets of insertion holes (16) are symmetrically opened on the outer periphery of the support balls (14). A support rod (15) is movably and sealed within the insertion hole (16) through a sealing ring (24). A through hole (25) is opened at the connection point of the support rod (15) to the sealing ring (8). A sealing cover (17) is provided on the outer periphery of one end of the support rod (15) inserted into the insertion hole (16).

4. The bathroom mirror surface flatness testing device according to claim 3, characterized in that, A breathable plate (23) is provided between the support rod (15) and the sealing ring (24) and the sealing cover (17). The breathable plate (23) is connected to the through hole (25) and is continuously held in the insertion hole (16).

5. The bathroom mirror surface flatness testing device according to claim 4, characterized in that, A limiting ring (18) is provided inside the socket (16). The limiting ring (18) is inclined at a large angle toward the opening end of the socket (16), and the limiting ring (18) is inclined at a small angle toward the inner end of the socket (16).

6. The bathroom mirror surface flatness testing device according to claim 5, characterized in that, A breathable plate (23) connecting the inside of the support ball (14) is provided at the end of the limiting ring (18) inside the insertion hole (16).

7. The bathroom mirror surface flatness testing device according to claim 6, characterized in that, The piston (10) has two electrical sleeves (11) on its upper end face. An electrical rod (12) is movably inserted into the electrical sleeve (11). The electrical rod (12) is correspondingly arranged on both sides of the inner side wall of the top of the column (3). The electrical sleeve (11) and the electrical rod (12) are electrically connected to the electromagnet in the base plate (1) and the external power supply, respectively. The electromagnet in the base plate (1) is magnetically connected to the magnetic absorbing piece (22). The magnetic absorbing piece (22) is movably arranged at the bottom of the detection seat (2).

8. The bathroom mirror surface flatness testing device according to claim 7, characterized in that, The detection seat (2) has a slide (20) with a smaller upper size and a larger lower size. A magnetic suction piece (22) is slidably connected in the slide (20). The outer peripheral size of the magnetic suction piece (22) is adapted to the size of the smaller upper size of the slide (20). The surface of the magnetic suction piece (22) is connected to the inner wall of the top of the slide (20) through a spring rod (21). The center of the spring rod (21) on the surface of the magnetic suction piece (22) is connected to the bottom end of the tactile detection head (19). The top end of the tactile detection head (19) is movably inserted into the top of the detection seat (2).

9. The bathroom mirror surface flatness testing device according to claim 8, characterized in that, The sealing cover (17) is conical, and the larger end of the sealing cover (17) slides and seals against the inner wall of the insertion hole (16). The sealing cover (17) itself has a spring-loaded deformation capability.

10. A bathroom mirror surface flatness testing device according to claim 9, characterized in that, There is a gap between the initial position of the sealing cover (17) and the limiting ring (18).

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