A drop ball test device for detecting impact resistance of an ophthalmic lens and a detection method thereof

Abstract

The application relates to the technical field of lens impact test, in particular to a falling ball test device for detecting the impact resistance of glasses and a detection method thereof, which comprises a machine table, a bearing table and a fixed plate arranged on the machine table, a clamping assembly arranged on the bearing table, and side plates arranged in a symmetrical manner on the fixed plate; a turnover adsorption assembly is arranged on the side plates, symmetrical rotating rods are connected to the turnover adsorption assembly, electromagnetic adsorption blocks are arranged on the rotating rods, and a limiting plate is rotatably arranged on the rotating rods; a lifting mechanism is arranged on the fixed plate and connected with the limiting plate, a follow-up switching mechanism connected with the lifting mechanism is arranged on the side plates; and an energizing mechanism is arranged on the fixed plate and connected with the rotating rods. Different thrust provided by the energizing mechanism can ensure that a steel ball provides different impact forces to the lens at the same height, so that the interference of environmental factors is eliminated.

Description

Technical Field

[0001] This invention relates to the field of lens impact testing technology, specifically a falling ball test device and its testing method for detecting the impact force of spectacle lenses. Background Technology

[0002] As optical components for correcting vision and protecting the eyes, the impact resistance of eyeglass lenses is a key indicator for measuring product quality and safety. In lens production and quality inspection, the drop ball test is the standard method for evaluating the impact resistance of lenses.

[0003] In existing technologies, ball drop test devices typically use electromagnetic chucks or mechanical grippers to attract steel balls. By controlling the electromagnet to be de-energized or the grippers to be released, the steel ball is allowed to fall freely from a stationary state. In this way, the initial velocity of the steel ball is guaranteed to be zero, and it undergoes uniformly accelerated linear motion only under the action of gravity. By adjusting the release height, the impact velocity of the steel ball when it contacts the lens can be changed, thereby controlling the impact energy.

[0004] When simulating larger impact energies, the release height of the steel ball needs to be increased accordingly. However, as the release height increases, the falling time of the steel ball will increase, and the degree of airflow interference will increase. This can easily cause the steel ball to deviate from its vertical falling trajectory, resulting in the landing point deviating from the center area of ​​the lens and leading to inaccurate impact test results. Summary of the Invention

[0005] The purpose of this invention is to provide a falling ball test device and method for detecting the impact force of eyeglass lenses, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A falling ball test device for detecting the impact resistance of spectacle lenses includes:

[0008] The machine base, and the support platform and the fixing plate set on the machine base, the support platform is equipped with clamping components, and the fixing plate is equipped with side plates that are symmetrically distributed.

[0009] Also includes:

[0010] A flip-up adsorption assembly is disposed on the side plate. The flip-up adsorption assembly is connected to symmetrically distributed rotating rods. Electromagnetic adsorption blocks are disposed on the rotating rods. Limiting plates are rotatably mounted on the rotating rods.

[0011] A lifting mechanism is provided on the fixed plate and connected to the limiting plate, and a follow-up switching mechanism connected to the lifting mechanism is provided on the side plate;

[0012] An energizing mechanism is disposed on the fixed plate and connected to the rotating rod. The energizing mechanism can provide a thrust to the electromagnetic adsorption block through the rotating rod when the lifting mechanism is separated from the limiting plate by the follow-up switching mechanism.

[0013] As a further embodiment of the present invention: the flipping adsorption assembly includes a second sliding groove formed on the side plate, a movable block is slidably installed in the second sliding groove, a motor and a support rod are provided on the movable block, the rotating rod is connected to the output shaft of the motor and is rotatably connected to the movable block, and the support rod is connected to the limiting plate.

[0014] As a further embodiment of the present invention: the lifting mechanism includes a lead screw rotatably mounted on the fixed plate, a threaded sleeve is threadedly connected to the lead screw, and a connecting plate is provided on the side wall of the threaded sleeve.

[0015] As a further embodiment of the present invention: the lifting mechanism further includes a guide column disposed on the fixed plate, the guide column having a guide sleeve that slides axially, the guide sleeve being connected to the connecting plate, the guide sleeve having a receiving plate disposed on its side wall, and a limit rod being slidably mounted on the receiving plate, the limit rod engaging with the limit plate.

[0016] As a further embodiment of the present invention: the follow-up switching mechanism includes a follow-up plate disposed at the end of the limiting rod, the follow-up plate is provided with a limiting post, and a guide groove is formed on the side plate to slide and engage with the limiting post.

[0017] As a further embodiment of the present invention: the follow-up switching mechanism further includes a first fixed post and a second fixed post disposed on the side plate, and a guide rod that abuts against the limiting post is rotatably mounted on the side plate, the guide rod abutting against the first fixed post and the second fixed post.

[0018] As a further embodiment of the present invention: the empowering mechanism includes fixed sleeves disposed on the fixed plate and symmetrically distributed, a movable rod sliding axially inside the fixed sleeve, and a connecting ring rotatably connected to the rotating rod at the end of the movable rod;

[0019] It also includes a support assembly and an elastic assembly disposed on the fixed plate and connected to the movable rod.

[0020] As a further embodiment of the present invention: the support assembly includes a second cylinder disposed on the fixed plate and symmetrically distributed thereon, and the telescopic end of the second cylinder is provided with a movable plate.

[0021] As a further embodiment of the present invention: the elastic component includes a fixed rod disposed on the movable plate and inserted into the fixed sleeve, a limit ring being provided at the end of the fixed rod, and a spring being installed inside the fixed sleeve, the two ends of the spring respectively abutting against the limit ring and the movable rod.

[0022] A method for testing a ball-dropping test device for detecting the impact resistance of spectacle lenses includes the following steps:

[0023] Step 1: The flip adsorption assembly is controlled by rotating the rod to move the electromagnetic adsorption block to the bearing position and perform electromagnetic adsorption on the steel ball;

[0024] Step 2: After adsorption is complete, the flip adsorption assembly is controlled by the rotating rod to flip the electromagnetic adsorption block again, so that it faces the support platform.

[0025] Step 3: The lifting mechanism operates and adjusts the height of the electromagnetic adsorption block through the limit plate and rotating rod. When the electromagnetic adsorption block reaches the release position, the lifting mechanism is controlled to separate from the limit plate under the action of the follow-up switching mechanism.

[0026] Step 4: The electromagnetic adsorption block removes the electromagnetic force and, under the action of the energizing mechanism, provides the steel ball with initial acceleration, so that the steel ball can perform an impact test on the lens placed on the support platform.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] This invention achieves automatic separation of the limit rod from the limit plate when it reaches a specified height, triggering the release of the steel ball, through the cooperation of the lifting mechanism and the follow-up switching mechanism. This ensures that the release height of the steel ball is accurate and consistent in each test, so that the landing point of the steel ball is always stable in the center area of ​​the lens.

[0029] Secondly, when the steel ball is in the impact release position, the energizing mechanism can provide the steel ball with corresponding acceleration. In this way, without changing the release height of the steel ball, the impact energy of the steel ball when it contacts the lens can be continuously and accurately controlled by adjusting the spring compression. Due to the significantly shortened descent stroke, the time the steel ball is exposed to environmental factors such as air resistance and airflow disturbance is significantly reduced, effectively suppressing the trajectory deviation of the steel ball during the descent process and ensuring that the steel ball always hits the center of the lens accurately in the vertical direction.

[0030] In the follow-up switching mechanism, the cooperation between the guide rod and the first and second fixed columns realizes the one-way passage and two-way limiting functions of the limiting column, ensuring that the separation action of the limiting rod and the limiting plate is accurately and orderly guided, thereby ensuring that the steel ball can be released in the same position during each test. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of one embodiment of a falling ball test device for detecting the impact resistance of eyeglass lenses.

[0032] Figure 2 This is a schematic diagram showing the connection relationship between a portion of the flipping adsorption component, the lifting mechanism, the follow-up switching mechanism, and the portion of the energy-generating mechanism in one embodiment of a ball drop test device for detecting the impact resistance of eyeglass lenses.

[0033] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0034] Figure 4 This is a partial cross-sectional structural schematic diagram of one embodiment of a falling ball test device for detecting the impact force of eyeglass lenses.

[0035] Figure 5 This is a frontal view schematic diagram of a falling ball test device for detecting the impact resistance of eyeglass lenses, showing part of the lifting mechanism and part of the follow-up switching mechanism in one embodiment.

[0036] Figure 6 This is a schematic diagram of the structure of a falling ball test device for detecting the impact resistance of eyeglass lenses, comprising a lifting mechanism, a partial flipping adsorption component, and a partial follow-up switching mechanism, in one embodiment.

[0037] Figure 7 This is an exploded structural diagram of a falling ball test device for detecting the impact resistance of eyeglass lenses, comprising a lifting mechanism, a partially flipping adsorption component, and a partially follow-up switching mechanism, in one embodiment.

[0038] In the diagram: 1. Machine base; 2. Support platform; 201. First chute; 3. Sliding block; 301. Clamping block; 4. First cylinder; 5. Fixed plate; 6. Side plate; 601. Second chute; 602. First vertical chute; 603. First inclined chute; 604. Second vertical chute; 605. Second inclined chute; 7. Movable block; 8. Motor; 9. Rotating rod; 10. Electromagnetic adsorption block; 1001. Adsorption tank; 11. Feed pipe; 12. Fixed sleeve; 13. Movable rod ; 1301, Connecting ring; 14, Second cylinder; 15, Movable plate; 16, Fixed rod; 1601, Limiting ring; 17, Spring; 18, Support rod; 19, Limiting plate; 20, Guide post; 21, Guide sleeve; 2101, Receiving plate; 22, Lead screw; 23, Threaded sleeve; 2301, Connecting plate; 24, Limiting rod; 25, Follower plate; 2501, Limiting post; 26, Guide rod; 27, First fixed post; 28, Second fixed post. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0041] Please see Figures 1-7 In this embodiment of the invention, a falling ball test device for detecting the impact force of spectacle lenses includes:

[0042] The machine base 1, and the support platform 2 and the fixing plate 5 set on the machine base 1, the support platform 2 is provided with a clamping assembly, and the fixing plate 5 is provided with side plates 6 that are symmetrically distributed.

[0043] Also includes:

[0044] A flip-up adsorption assembly is provided on the side plate 6. A symmetrically distributed rotating rod 9 is connected to the flip-up adsorption assembly. An electromagnetic adsorption block 10 is provided on the rotating rod 9. A limit plate 19 is rotatably installed on the rotating rod 9.

[0045] A lifting mechanism is provided on the fixed plate 5 and connected to the limiting plate 19. A follow-up switching mechanism connected to the lifting mechanism is provided on the side plate 6.

[0046] An energizing mechanism is disposed on the fixed plate 5 and connected to the rotating rod 9. The energizing mechanism can provide a thrust to the electromagnetic adsorption block 10 through the rotating rod 9 when the lifting mechanism is separated from the limiting plate 19 by the follow-up switching mechanism.

[0047] Specifically, a feeding channel is formed on the fixed plate 5, and an inlet pipe 11 connected to the feeding channel is provided on the fixed plate 5. An adsorption groove 1001 is formed at one end of the electromagnetic adsorption block 10. The electromagnetic adsorption block 10 also has a built-in electromagnet that can generate magnetic force when energized. When conducting an impact test on the lens, it is necessary to ensure that the steel ball lands at the center of the lens. Therefore, during the release of the steel ball, it is necessary to ensure that the falling height of the steel ball is as low as possible to reduce interference from environmental factors. To this end, when an impact test is required, the lens can be placed on the bearing platform 2 through the clamping assembly, and the initial thrust of the energizing mechanism can be adjusted according to the lens specifications. Under the action of the flipping adsorption assembly, the electromagnetic adsorption block 10 is flipped by the rotating rod 9, so that the adsorption groove 1001 faces the fixed plate 5. Subsequently, the electromagnetic adsorption block 10 is flipped by the rotating rod 9, and the adsorption groove 1001 faces the fixed plate 5. The steel ball is controlled by the feed pipe 11 to enter the adsorption tank 1001 through the feeding channel. Under the action of electromagnetic force, the steel ball is firmly adsorbed in the adsorption tank 1001. After adsorption is completed, the flip adsorption assembly controls the electromagnetic adsorption block 10 to flip again through the rotating rod 9, so that the steel ball faces the lens. At the same time, the lifting mechanism works and controls the electromagnetic adsorption block 10 to move towards the release point through the limiting plate 19 and the rotating rod 9. When the steel ball moves to the release point, under the action of the trigger switching mechanism, the lifting mechanism is controlled to separate from the limiting plate 19, and the electromagnet in the electromagnetic adsorption block 10 is de-energized, so that the steel ball is no longer adsorbed. At the same time, under the action of the energizing mechanism, the initial acceleration is provided to the steel ball, so that the steel ball can act on the lens surface with a specific impact force at a fixed height, thereby completing the impact test.

[0048] Please see Figures 2-4 The flipping adsorption assembly includes a second sliding groove 601 formed on the side plate 6. A movable block 7 is slidably installed in the second sliding groove 601. A motor 8 and a support rod 18 are provided on the movable block 7. The rotating rod 9 is connected to the output shaft of the motor 8 and is rotatably connected to the movable block 7. The support rod 18 is connected to the limiting plate 19.

[0049] Please see Figure 1 In detail, the support platform 2 has a first sliding groove 201 that is circumferentially distributed. A sliding block 3 is slidably installed in the first sliding groove 201. A clamping block 301 is provided on the sliding block 3. The support platform 2 is also provided with a first cylinder 4. The telescopic end of the first cylinder 4 is connected to the sliding block 3 and can push the sliding block 3 to slide along the first sliding groove 201. The central axis of the electromagnetic adsorption block 10 coincides with the central axis of the support platform 2.

[0050] In the initial state, the movable block 7 is located at the end of the stroke of the second slide 601 facing the side close to the fixed plate 5, so that the distance between the electromagnetic adsorption block 10 and the feeding channel on the fixed plate 5 is minimized. Under the action of the motor 8, the opening of the adsorption groove 1001 formed on the electromagnetic adsorption block 10 is controlled to face the feeding channel by rotating the rod 9.

[0051] At this time, the lens can be placed on the support platform 2. Under the action of the first cylinder 4, the sliding block 3 pushes the clamping block 301 to move towards each other, thereby circumferentially positioning and clamping the lens.

[0052] Meanwhile, the steel ball can be placed in the feed pipe 11 and conveyed to the adsorption tank 1001 through the feeding channel. At the same time, the electromagnet is energized and generates electromagnetic attraction, which firmly adsorbs the steel ball in the adsorption tank 1001. Subsequently, the motor 8 works and controls the rotating rod 9 to rotate, which drives the electromagnetic adsorption block 10 to rotate. When the electromagnetic adsorption block 10 rotates half a turn, that is, when the opening of the adsorption tank 1001 faces the lens, it means that the steel ball is facing the lens. When the steel ball moves to the release height, the electromagnet is de-energized, the electromagnetic attraction disappears, and under the action of gravity, the steel ball leaves the adsorption tank 1001 and finally falls to the center of the lens, thus completing the impact test on the lens.

[0053] Please see Figures 2-7 The lifting mechanism includes a lead screw 22 rotatably mounted on the fixed plate 5, a threaded sleeve 23 threadedly connected to the lead screw 22, a connecting plate 2301 provided on the side wall of the threaded sleeve 23, and a guide post 20 provided on the fixed plate 5. A guide sleeve 21 is axially slidable on the guide post 20. The guide sleeve 21 is connected to the connecting plate 2301. A receiving plate 2101 is provided on the side wall of the guide sleeve 21. A limiting rod 24 is slidably mounted on the receiving plate 2101. The limiting rod 24 abuts against the limiting plate 19.

[0054] Please see Figures 2-5 The follow-up switching mechanism includes a follow-up plate 25 disposed at the end of the limiting rod 24, a limiting post 2501 disposed on the follow-up plate 25, a guide groove formed on the side plate 6 that slides and engages with the limiting post 2501, the follow-up switching mechanism also includes a first fixing post 27 and a second fixing post 28 disposed on the side plate 6, a guide rod 26 rotatably mounted on the side plate 6 that abuts against the limiting post 2501, the guide rod 26 abuts against the first fixing post 27 and the second fixing post 28.

[0055] Please see Figure 5Furthermore, the guide groove is composed of multiple groove segments, namely a first vertical groove 602, a first inclined groove 603, a second vertical groove 604, and a second inclined groove 605. The two ends of the first inclined groove 603 are respectively connected to the middle position of the first vertical groove 602 and one end of the second vertical groove 604. The two ends of the second inclined groove 605 are respectively connected to the ends of the first vertical groove 602 and the second vertical groove 604. The guide rod 26 is located at the connection position of the first vertical groove 602 and the first inclined groove 603, and under the action of gravity, the guide rod 26 abuts against the first fixed post 27.

[0056] In the initial state, under the action of the lead screw 22, the threaded sleeve 23 is located at the end of the stroke of the lead screw 22 near the fixed plate 5. Under the action of the connecting plate 2301, the distance between the guide sleeve 21 and the fixed plate 5 is minimized. The guide sleeve 21 will control the limiting rod 24 to be located at the end of the stroke near the fixed plate 5 through the receiving plate 2101. The limiting post 2501 is located at the end of the stroke of the first vertical groove 602 away from the second inclined groove 605. Therefore, under the action of the follower plate 25, the limiting rod 24 is located at the end of the stroke near the rotating rod 9 and is in contact with the limiting plate 19. Under the action of the limiting plate 19, the distance between the electromagnetic adsorption block 10 and the fixed plate 5 is minimized, and the electromagnetic adsorption block 10 is in the bearing position.

[0057] At this time, the steel ball can be placed in the feed pipe 11 and enter the adsorption tank 1001 through the feeding channel. Then, under the action of the flip adsorption component, the electromagnetic adsorption block 10 flips half a turn so that the steel ball faces the lens. After the flip is completed, the screw 22 is controlled to rotate, thereby driving the threaded sleeve 23 to move along the axial direction of the screw 22. Under the action of the connecting plate 2301, the guide sleeve 21 slides along the axial direction of the guide post 20. The cooperation between the guide post 20 and the guide sleeve 21 ensures that the threaded sleeve 23 only moves along the axial direction of the screw 22 without rotating.

[0058] The guide sleeve 21 drives the limiting rod 24 to move toward the lens direction through the receiving plate 2101. Under the combined action of gravity and the power-enabling mechanism, the limiting plate 19 remains in contact with the limiting rod 24 and moves downward synchronously with the limiting rod 24. The limiting rod 24 drives the limiting post 2501 to slide along the first vertical groove 602 on the side plate 6 through the follower plate 25.

[0059] When the limiting post 2501 moves to the position where the first vertical groove 602 and the first inclined groove 603 are connected, the limiting post 2501 contacts the guide rod 26. Since the guide rod 26 is in a blocking position due to the force of gravity, it abuts against the first fixed post 27. The limiting post 2501 is forced to change its direction of movement, disengage from the first vertical groove 602 and enter the first inclined groove 603. The limiting post 2501 will control the limiting rod 24 to move away from the rotating rod 9 through the follower plate 25, so that the limiting rod 24 and the limiting plate 19 gradually separate.

[0060] When the limiting post 2501 moves to the position where the first inclined groove 603 and the second vertical groove 604 are connected, the steel ball moves down to the specified height, i.e. the impact release position. At this time, the limiting rod 24 is completely separated from the limiting plate 19, the electromagnetic adsorption block 10 loses its limiting support, and at the same time, the electromagnet is de-energized and the electromagnetic adsorption force disappears. Meanwhile, the energizing mechanism provides additional thrust to the electromagnetic adsorption block 10 through the rotating rod 9, so that the steel ball obtains an initial acceleration in addition to the gravitational acceleration.

[0061] In this way, it can be ensured that the steel ball can reach the preset impact speed within a short falling distance and act on the lens surface with a specific impact force. At the same time, it can also avoid the interference of environmental factors such as air resistance and airflow disturbance caused by excessive falling distance on the trajectory of the steel ball, ensuring that the steel ball always falls vertically and accurately hits the center area of ​​the lens, thereby ensuring the accuracy of the impact test results.

[0062] After the impact test is completed, the movable block 7 moves to the end of the stroke of the second slide groove 601 away from the fixed plate 5, the lead screw 22 continues to rotate, the limiting rod 24 remains separated from the limiting plate 19, the limiting post 2501 slides along the second vertical groove 604 and enters the second inclined groove 605. During this process, the limiting rod 24 is located below the limiting plate 19 and gradually moves toward the direction closer to the rotating rod 9.

[0063] When the limiting post 2501 moves to the position where the second inclined groove 605 and the first vertical groove 602 are connected, the limiting rod 24 moves again to the position where it engages with the limiting plate 19. Then, the lead screw 22 reverses, the limiting rod 24 moves toward the direction closer to the fixed plate 5, and once again engages with the limiting plate 19, thereby guiding the limiting plate 19 and the electromagnetic adsorption block 10 to move toward the direction closer to the fixed plate 5 to reset.

[0064] As the limiting post 2501 slides upward along the first vertical groove 602, when the limiting post 2501 contacts the other side of the guide rod 26, the guide rod 26 is pushed and deflects towards the direction closer to the second fixed post 28, keeping the first vertical groove 602 unobstructed. After the limiting post 2501 passes the position of the guide rod 26, the guide rod 26 automatically swings back under the action of gravity and abuts against the first fixed post 27 again. When the limiting post 2501 returns to the end of its stroke on the side of the first vertical groove 602 away from the second inclined groove 605, the electromagnetic adsorption block 10 returns to the initial bearing position.

[0065] Please see Figures 1-4 The enabling mechanism includes fixed sleeves 12 symmetrically distributed on the fixed plate 5, with a movable rod 13 axially sliding inside the fixed sleeve 12. The end of the movable rod 13 is provided with a connecting ring 1301 rotatably connected to the rotating rod 9. It also includes a support assembly and an elastic assembly disposed on the fixed plate 5 and connected to the movable rod 13. The support assembly includes a second cylinder 14 symmetrically distributed on the fixed plate 5, with a movable plate 15 at the telescopic end of the second cylinder 14. The elastic assembly includes a fixed rod 16 disposed on the movable plate 15 and inserted into the fixed sleeve 12, with a limit ring 1601 at the end of the fixed rod 16. A spring 17 is installed inside the fixed sleeve 12, with both ends of the spring 17 abutting against the limit ring 1601 and the movable rod 13, respectively.

[0066] Furthermore, when the second cylinder 14 controls the movable plate 15 to be at the end of its stroke away from the fixed plate 5, and controls the maximum distance between the limiting ring 1601 and the fixed plate 5 through the fixed rod 16, and the steel ball is in the impact release position, in this state, the elongation of the spring 17 in its natural state is equal to the distance between the limiting ring 1601 and the end of the movable rod 13, that is, the spring 17 does not provide additional thrust to the steel ball;

[0067] When an impact test is required on the lens, the distance between the movable plate 15 and the fixed plate 5 can be adjusted according to the required impact force of the lens, and the spring 17 can be compressed by the fixed rod 16 and the limiting ring 1601 so that the spring 17 can provide the corresponding thrust when the steel ball is in the impact release position.

[0068] After the adjustment is completed, under the action of the lifting mechanism, the electromagnetic adsorption block 10 is guided to move to the bearing position and adsorb the steel ball. At this time, the distance between the rotating rod 9 and the fixed plate 5 is the smallest. The rotating rod 9 controls the movable rod 13 to be located at the end of the stroke in the direction close to the movable plate 15 through the connecting ring 1301 so that the compression of the spring 17 is the largest in this state.

[0069] Subsequently, the flipping adsorption assembly controls the electromagnetic adsorption block 10 to flip via the rotating rod 9, causing the steel ball to face the lens. Under the action of the lifting mechanism, the steel ball gradually moves towards the impact release position. When the steel ball moves to the impact release position, the limiting rod 24 just separates from the limiting plate 19, so that the electromagnetic adsorption block 10 is no longer blocked by the limiting. At the same time, the electromagnet is de-energized, so that the steel ball is no longer subject to adsorption force. At this time, the spring 17 is released elastically and pushes the movable rod 13 to move away from the movable plate 15. Thus, through the connecting ring 1301, a thrust is provided to the rotating rod 9 towards the lens, so that the steel ball is subjected to gravity and obtains an initial acceleration, thereby acting on the lens with a specific impact force at a specified height to complete the impact test.

[0070] A method for testing a ball-dropping test device for detecting the impact resistance of spectacle lenses includes the following steps:

[0071] Step 1: The flip adsorption assembly is controlled by rotating rod 9 to move electromagnetic adsorption block 10 to the bearing position and perform electromagnetic adsorption on the steel ball;

[0072] Step 2: After adsorption is completed, the flip adsorption assembly is controlled by the rotating rod 9 to flip the electromagnetic adsorption block 10 again and face the support platform 2.

[0073] Step 3: The lifting mechanism operates and adjusts the height of the electromagnetic adsorption block 10 through the limit plate 19 and the rotating rod 9. When the electromagnetic adsorption block 10 reaches the release position, the lifting mechanism is controlled to separate from the limit plate 19 under the action of the follow-up switching mechanism.

[0074] Step 4: The electromagnetic adsorption block 10 removes the electromagnetic force and, under the action of the energizing mechanism, provides the steel ball with initial acceleration, so that the steel ball impacts the lens placed on the support platform 2.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A falling ball test device for detecting the impact force of spectacle lenses, comprising: The machine base, and the support platform and the fixing plate set on the machine base, the support platform is equipped with clamping components, and the fixing plate is equipped with side plates that are symmetrically distributed. Its characteristic is that it further includes: A flip-up adsorption assembly is disposed on the side plate. The flip-up adsorption assembly is connected to symmetrically distributed rotating rods. Electromagnetic adsorption blocks are disposed on the rotating rods. Limiting plates are rotatably mounted on the rotating rods. A lifting mechanism is provided on the fixed plate and connected to the limiting plate, and a follow-up switching mechanism connected to the lifting mechanism is provided on the side plate; An energizing mechanism is disposed on the fixed plate and connected to the rotating rod. The energizing mechanism can provide a thrust to the electromagnetic adsorption block through the rotating rod when the lifting mechanism is separated from the limiting plate by the follow-up switching mechanism.

2. The falling ball test device for detecting the impact resistance of spectacle lenses according to claim 1, characterized in that, The flipping adsorption assembly includes a second sliding groove formed on the side plate, a movable block slidably installed in the second sliding groove, a motor and a support rod provided on the movable block, the rotating rod being connected to the output shaft of the motor and rotatably connected to the movable block, and the support rod being connected to the limiting plate.

3. The falling ball test device for detecting the impact force of spectacle lenses according to claim 1, characterized in that, The lifting mechanism includes a lead screw rotatably mounted on the fixed plate, a threaded sleeve threadedly connected to the lead screw, and a connecting plate provided on the side wall of the threaded sleeve.

4. The falling ball test device for detecting the impact resistance of spectacle lenses according to claim 1, characterized in that, The lifting mechanism further includes a guide column disposed on the fixed plate. The guide column has a guide sleeve that slides axially. The guide sleeve is connected to the connecting plate. A receiving plate is disposed on the side wall of the guide sleeve. A limit rod is slidably installed on the receiving plate. The limit rod abuts against the limit plate.

5. The falling ball test device for detecting the impact resistance of spectacle lenses according to claim 1, characterized in that, The follow-up switching mechanism includes a follow-up plate disposed at the end of the limit rod, a limit post disposed on the follow-up plate, and a guide groove formed on the side plate that slides and engages with the limit post.

6. The falling ball test device for detecting the impact resistance of spectacle lenses according to claim 1, characterized in that, The follow-up switching mechanism further includes a first fixed post and a second fixed post disposed on the side plate. A guide rod that abuts against the limiting post is rotatably mounted on the side plate. The guide rod abuts against the first fixed post and the second fixed post.

7. The falling ball test device for detecting the impact resistance of spectacle lenses according to claim 1, characterized in that, The empowering mechanism includes fixed sleeves disposed on the fixed plate and symmetrically distributed therein, a movable rod sliding axially inside the fixed sleeve, and a connecting ring rotatably connected to the rotating rod at the end of the movable rod; It also includes a support assembly and an elastic assembly disposed on the fixed plate and connected to the movable rod.

8. The falling ball test device for detecting the impact resistance of spectacle lenses according to claim 7, characterized in that, The support assembly includes a second cylinder disposed on the fixed plate and symmetrically distributed thereon, and the telescopic end of the second cylinder is provided with a movable plate.

9. A falling ball test device for detecting the impact resistance of spectacle lenses according to claim 8, characterized in that, The elastic component includes a fixed rod disposed on the movable plate and inserted into the fixed sleeve. A limit ring is provided at the end of the fixed rod. A spring is installed inside the fixed sleeve, and the two ends of the spring abut against the limit ring and the movable rod, respectively.

10. A method for testing a falling ball test device for detecting the impact resistance of spectacle lenses, comprising using the falling ball test device for detecting the impact resistance of spectacle lenses as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: The flip adsorption assembly is controlled by rotating the rod to move the electromagnetic adsorption block to the bearing position and perform electromagnetic adsorption on the steel ball; Step 2: After adsorption is complete, the flip adsorption assembly is controlled by the rotating rod to flip the electromagnetic adsorption block again, so that it faces the support platform. Step 3: The lifting mechanism operates and adjusts the height of the electromagnetic adsorption block through the limit plate and rotating rod. When the electromagnetic adsorption block reaches the release position, the lifting mechanism is controlled to separate from the limit plate under the action of the follow-up switching mechanism. Step 4: The electromagnetic adsorption block removes the electromagnetic force and, under the action of the energizing mechanism, provides the steel ball with initial acceleration, so that the steel ball can perform an impact test on the lens placed on the support platform.

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