Endoscope bending fatigue strength testing device

Abstract

The invention discloses an endoscope bending fatigue strength testing device, and relates to the technical field of endoscope detection, the endoscope bending fatigue strength testing device comprises a test board, an endoscope and a fixer, the fixer is installed on the top of the test board and is used for fixing two ends of the endoscope; a transmission block is slidably mounted at the top of the test board, and a first driving mechanism corresponding to the transmission block is arranged in the top of the test board and used for driving the transmission block to reciprocate in the top of the test board. By arranging the testing mechanism and the first driving mechanism, continuous bending testing can be conducted on different positions of the endoscope, meanwhile, due to the fact that the angle of the testing mechanism can be changed, bending of the endoscope in different directions can be tested when the endoscope bending testing device is used, and the testing efficiency is improved. The testing effect and the testing efficiency of the endoscope are further improved, the bending fatigue strength of the endoscope is tested to the maximum extent, and the endoscope bending fatigue strength testing device is more suitable for being used by endoscope manufacturers.

Description

Technical Field

[0001] The invention relates to the technical field of endoscope detection, in particular to an endoscope bending fatigue strength testing device. Background Art

[0002] Endoscope is a commonly used medical device, which is mainly composed of a flexible part, a light source and a set of lenses. It enters the human body through the natural channels of the human body or through a small incision made during surgery. It can directly observe the changes in relevant parts. The bent part needs to be bent frequently during use. In order to ensure the quality of the endoscope, the manufacturer of the endoscope will conduct corresponding tests on the endoscope.

[0003] Performing a bending fatigue strength test on an endoscope is a type of endoscope inspection, and an endoscope bending fatigue strength testing device is required for the inspection. There are many types of endoscope bending fatigue strength testing devices on the market, such as an endoscope bending fatigue strength testing device with a publication number of CN117288612B. The device can perform 2-4 positioning actions at 2-4 points during bending inspection through a designed multi-point positioning mechanism, thereby ensuring that the endoscope tube of the bending drive member does not form a freely movable end during bending inspection, and ensuring that the endoscope tube can be stably bent as the bending drive member moves in the direction of the bending drive member, and that the two ends will not follow the movement, thereby improving the efficiency of synchronous bending inspection; at the same time, the pulling member can automatically pull the endoscope tube to move, so as to automatically adjust the bending position for inspection, thereby realizing inspection of more than two positions, thereby improving the flexibility and extensiveness of inspection.

[0004] Endoscope bending fatigue strength testing devices similar to the above-mentioned applications still have certain problems in actual use, because the testing device detects one point on the endoscope each time. After all points are detected, it will take a relatively long time, resulting in low overall detection efficiency. This will also affect the manufacturer's delivery speed. In order to improve the detection efficiency, it is urgently necessary to improve the existing endoscope bending fatigue strength testing device. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an endoscope bending fatigue strength testing device to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an endoscope bending fatigue strength testing device, comprising a test bench, an endoscope and a fixture, wherein the fixture is installed on the top of the test bench and is used to fix the two ends of the endoscope; a transmission block is slidably installed on the top of the test bench, and a first driving mechanism corresponding to the transmission block is arranged inside the top of the test bench, which is used to drive the transmission block to reciprocate inside the top of the test bench; A testing mechanism for testing the endoscope is rotatably mounted on the top of the transmission block, and the testing mechanism includes a rotating block rotatably mounted on the top of the transmission block, a tripod fixedly mounted on the end of the rotating block, and a testing wheel rotatably mounted on the tripod, and the testing wheel is used to bend the endoscope, and a torsion spring corresponding to the testing mechanism is arranged in the top of the transmission block; A first support frame and a second support frame are arranged above the test bench for limiting the movement of the test mechanism, and the installation positions of the first support frame and the second support frame are staggered, and the distances between the ends of the first support frame and the second support frame and the top side wall of the test bench are both greater than the length of the test mechanism; A transmission mechanism is arranged in the transmission block, which is used to drive the test mechanism to rotate. A transmission column is rotatably installed on the top of the test bench, and a driving rod is slidably installed in the end of the transmission column. The transmission mechanism includes a transmission rod rotatably installed in the transmission block, and the transmission mechanism is slidably connected to the driving rod through the transmission rod, and the transmission mechanism is driven by the driving rod. The transmission rod is defined as being slidably connected to the driving rod only when the test mechanism is located below the first support frame; A second driving mechanism for driving the transmission column to rotate is arranged in the top of the test bench, and the second driving mechanism is limited to being started only after the transmission rod and the driving rod are slidably connected.

[0007] By adopting the above technical solution, the device can test the bending of the endoscope in different directions when in use, further improving the testing effect and testing efficiency of the endoscope, and testing the bending fatigue strength of the endoscope to the greatest extent.

[0008] The present invention is further configured such that the fixture consists of a positioning groove, a handle and a pressure block, the top outer wall of the test bench is penetrated by two groups of positioning grooves for installing the endoscope, and a pressure block for fixing the endoscope is slidably installed inside the top outer wall of the test bench, and a handle rotatably connected to the pressure block is installed on the top bolt of the test bench.

[0009] By adopting the above technical solution, the fixed position of the endoscope is ensured after installation.

[0010] The present invention is further configured such that the first driving mechanism consists of a bidirectional screw and a motor, the bidirectional screw is rotatably installed in the top of the test bench, and the bidirectional screw is threadedly connected to the transmission block, and a slide groove for sliding the transmission block is opened in the top of the test bench, and a motor connected to the bidirectional screw is installed on the outer wall of the test bench.

[0011] By adopting the above technical solution, the transmission block will start to slide back and forth on the test bench under the action of the bidirectional lead screw.

[0012] The present invention is further configured such that a limiting groove corresponding to the transmission block is formed at the end of the tripod, and the top of the transmission block is located in the limiting groove.

[0013] By adopting the above technical solution, the limiting groove can support the top end of the transmission block to prevent it from being deformed after long-term use.

[0014] The present invention is further configured such that the testing mechanism also includes balls and rollers, a plurality of groups of balls in contact with the outer wall of the endoscope are installed at equal angles on the outer wall of the testing wheel, a plurality of groups of rollers are symmetrically installed on the outer walls on both sides of the tripod, and during the movement of the testing mechanism, the rollers are respectively in contact with the testing table and the first support frame and the second support frame.

[0015] By adopting the above technical solution, the wear between the tripod and the test bench, the first support frame and the second support frame is reduced during the test process.

[0016] The present invention is further configured such that a plurality of groups of load-bearing frames connected to the first support frame and the second support frame are symmetrically installed on the top of the test bench, and the first support frame and the second support frame are located on the same horizontal plane.

[0017] By adopting the above technical solution, the fixed position of the first support frame and the second support frame during use is effectively ensured.

[0018] The present invention is further configured such that the transmission mechanism further includes a rectangular groove, a guide cylinder, a coupling groove, a main gear, a slave gear and a protrusion, the end of the transmission rod close to the driving rod is fixedly mounted with a guide cylinder, and a rectangular groove corresponding to the driving rod is penetrated through the guide cylinder and the transmission rod, and the rectangular groove in the guide cylinder is designed to be outwardly opened; The main gear is mounted on the outer wall of the transmission rod, and multiple sets of slave gears meshing with the main gear are mounted at equal angles on the outer wall of the end of the rotating block; A protrusion is fixedly mounted on the outer wall of the driving rod, and a coupling groove corresponding to the protrusion is opened in the guide tube and the transmission rod, and the coupling groove corresponds to the position of the protrusion only when the tripod is located below the first supporting frame.

[0019] By adopting the above technical solution, it is ensured that the tripod can smoothly rotate from the state of being below the first support frame to the state of being below the second support frame.

[0020] The present invention is further configured such that the cross section of the driving rod is T-shaped, and a spring fixedly connected to the transmission column is installed at the end of the driving rod.

[0021] By adopting the above technical solution, under the action of the spring, it is ensured that the driving rod can be smoothly reset after being compressed.

[0022] The present invention is further configured such that the second driving mechanism is composed of a spur gear, a rack and an electric push rod, the spur gear is fixedly mounted on the outer wall of the transmission column, a rack meshingly connected to the spur gear is slidably mounted in the test bench, and an electric push rod connected to the rack is installed in the test bench, and the electric push rod is started after the end of the driving rod passes through the transmission rod.

[0023] By adopting the above technical solution, it is ensured that the transmission column can smoothly drive the driving rod to rotate.

[0024] The present invention is further configured such that a shielding rod for shielding the test mechanism is rotatably installed at the end of the first support frame, and the shielding rod is limited to be able to rotate only in the direction of the end of the second support frame, and a torsion spring box for resetting the shielding rod is installed on the top of the first support frame.

[0025] By adopting the above technical solution, it is ensured that the testing mechanism can slide smoothly between the first support frame and the second support frame.

[0026] In summary, the present invention mainly has the following beneficial effects: The present invention is provided with a testing mechanism and a first driving mechanism, so that the present invention can perform continuous bending tests on different positions of the endoscope. At the same time, because the angle of the testing mechanism can be changed, the present invention can test the bending of the endoscope in different directions when in use, further improving the testing effect and testing efficiency of the endoscope, and testing the bending fatigue strength of the endoscope to the greatest extent, making the present invention more suitable for use by endoscope manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the test bench of the present invention after sectioning; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention after removing the test bench and the load-bearing frame; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 It is a three-dimensional structural schematic diagram of the testing mechanism of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the testing mechanism of the present invention in the process of sliding between the first supporting frame and the second supporting frame; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure of the testing mechanism of the present invention when it is located below the second supporting frame; Fig. 9 For the present invention Figure 5 Schematic diagram of the three-dimensional structure from another perspective; Fig.10 For the present invention Fig. 9 A schematic diagram of the three-dimensional structure of the transmission block after being cut open in the state; Fig.11 For the present invention Fig.10 A schematic diagram of the three-dimensional structure of the transmission rod after being cut open in the state; Fig.12 is a schematic diagram of the three-dimensional structure of the second driving mechanism of the present invention; Fig.13 It is a three-dimensional structural schematic diagram of the second driving mechanism in operation and the testing mechanism of the present invention; Fig.14 For the present invention Fig.13 Schematic diagram of the top view structure.

[0028] In the figure: 1. test bench; 2. endoscope; 3. positioning groove; 4. handle; 5. pressure block; 6. transmission block; 7. bidirectional screw rod; 8. motor; 9. rotating block; 10. tripod; 11. limit groove; 12. test wheel; 121. ball; 122. roller; 13. load-bearing frame; 14. first support frame; 15. second support frame; 16. transmission rod; 161. rectangular groove; 162. guide cylinder; 163. coupling groove; 17. main gear; 18. slave gear; 19. transmission column; 20. driving rod; 201. bump; 21. spring; 22. flat gear; 23. rack; 24. electric push rod; 25. push-type wireless switch; 251. battery; 252. round hole charging head; 26. wireless switch receiver; 27. shielding rod; 28. torsion spring box. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] The following describes an embodiment of the present invention based on its overall structure.

[0031] An endoscope bending fatigue strength testing device, such as Figure 1 - Fig.14 As shown, it includes a test bench 1, an endoscope 2 and a fixture, wherein the fixture is installed on the top of the test bench 1 and is used to fix the two ends of the endoscope 2; In some examples, the fixture is composed of a positioning slot 3, a handle 4, and a pressing block 5; Among them, two groups of positioning grooves 3 for installing the endoscope 2 are opened through the outer wall of the top of the test bench 1. Through the setting of the positioning grooves 3, the two ends of the endoscope 2 can be smoothly installed on the test bench 1, and a pressure block 5 for fixing the endoscope 2 is slidably installed in the outer wall of the top of the test bench 1, and a handle 4 rotatably connected to the pressure block 5 is bolted on the top of the test bench 1. When the endoscope 2 enters the positioning groove 3, by rotating the handle 4, the pressure block 5 will be restricted by the test bench 1, so that it can only move up and down, and then the pressure block 5 will squeeze and fix the end of the endoscope 2 under the action of the handle 4, so as to ensure the fixed position of the endoscope 2 after installation; Furthermore, a transmission block 6 is slidably installed on the top of the test bench 1, and a first driving mechanism corresponding to the transmission block 6 is arranged inside the top of the test bench 1, which is used to drive the transmission block 6 to reciprocate inside the top of the test bench 1. At the same time, a testing mechanism for testing the endoscope 2 is rotatably installed on the top of the transmission block 6. When the first driving component is started, the transmission block 6 will drive the testing mechanism to operate, so that the testing mechanism bends different positions of the endoscope 2, effectively improving the detection range of the testing mechanism for the endoscope 2 and improving the detection efficiency.

[0032] In some examples, such as Figure 3 - Fig.11 As shown, the testing mechanism includes a rotating block 9, a tripod 10 and a testing wheel 12; Among them, the rotating block 9 is rotatably installed on the top of the transmission block 6, and the tripod 10 is fixedly installed on the end of the rotating block 9, and a plurality of test wheels 12 for bending the endoscope 2 are rotatably installed on the tripod 10. When the endoscope 2 needs to be tested, the endoscope 2 is first inserted into the tripod 10, and then the endoscope 2 is attached to the outer walls of the plurality of test wheels 12. At this time, the endoscope 2 will bend under the action of the plurality of test wheels 12, and then when the transmission block 6 drives the test mechanism to move, the test wheel 12 will bend different positions of the endoscope 2, thereby ensuring that the device will perform bending detection on multiple positions of the endoscope 2 after operation, greatly improving the efficiency of the fatigue test.

[0033] In some examples, a first support frame 14 and a second support frame 15 for limiting the movement of the test mechanism are arranged above the test bench 1, and the installation positions of the first support frame 14 and the second support frame 15 are staggered so that the first support frame 14 and the second support frame 15 do not interfere with each other, and the distances between the ends of the first support frame 14 and the second support frame 15 and the top side walls of the test bench 1 are greater than the length of the test mechanism, ensuring that the test mechanism can smoothly change its angle after passing through the first support frame 14 and the second support frame 15.

[0034] For example, Figure 3 - Fig.11As shown, the testing mechanism also includes a ball 121 and a roller 122; Among them, multiple groups of balls 121 that are attached to the outer wall of the endoscope 2 are installed at equal angles on the outer wall of the test wheel 12, so that the balls 121 are directly connected to the endoscope 2, thereby reducing the wear between the test wheel 12 and the endoscope 2. Multiple groups of rollers 122 are symmetrically installed on the outer walls of both sides of the tripod 10, and during the movement of the test mechanism, the rollers 122 are respectively in contact with the test bench 1 and the first support frame 14 and the second support frame 15, so that during the sliding of the test mechanism, the rollers 122 are affected by the test bench 1 and the first support frame 1 4 or the first support frame 14 and the second support frame 15 or the test bench 1 and the second support frame 15, thereby ensuring the fixed angle of the tripod 10 during the sliding of the test mechanism, ensuring that the test wheel 12 can smoothly bend the endoscope 2 at this time, and at the same time, because the roller 122 is in contact with the test bench 1, the first support frame 14 and the second support frame 15, and the roller 122 can rotate, thereby reducing the wear between the tripod 10 and the test bench 1, the first support frame 14 and the second support frame 15 during the test process; At the same time, because a torsion spring corresponding to the testing mechanism is arranged inside the top of the transmission block 6, and the torsion spring is arranged at the connection position between the transmission block 6 and the rotating block 9, when the tripod 10 rotates to the bottom of the second support frame 15, the torsion spring will be compressed, and then when the detection mechanism slides out from under the second support frame 15, the torsion spring will drive the detection mechanism to rotate, thereby ensuring that the angle of the detection mechanism can be changed.

[0035] In some examples, such as Figure 1 and Figure 5 - Fig.12 As shown, a transmission column 19 is rotatably installed on the top of the test bench 1, and a driving rod 20 is slidably installed in the end of the transmission column 19. A transmission mechanism is provided in the transmission block 6 for driving the test mechanism to rotate. The transmission mechanism includes a transmission rod 16 rotatably installed in the transmission block 6, and the transmission mechanism is slidably connected with the driving rod 20 through the transmission rod 16. When the transmission rod 16 is connected with the driving rod 20, the transmission column 19 rotates, which causes the driving rod 20 to drive the transmission rod 16 to rotate synchronously, so that the transmission mechanism is driven by the driving rod 20. At the same time, the transmission rod 16 is limited to be slidably connected with the driving rod 20 only when the test mechanism is located below the first support frame 14; Furthermore, a second driving mechanism for driving the transmission column 19 to rotate is provided on the top of the test bench 1, and the second driving mechanism is limited to being started only after the transmission rod 16 is slidably connected with the driving rod 20. When the second driving mechanism is started, the transmission rod 16 starts to rotate. At this time, the transmission mechanism obtains power and starts to run, causing the test mechanism to rotate 180°. When the transmission block 6 is reset under the action of the first driving mechanism, the test mechanism will be pulled to the bottom of the second support frame 15, so that the test wheel 12 can perform bending tests on different positions of the endoscope 2.

[0036] See also Figure 1 - Figure 3 , the first driving mechanism is composed of a bidirectional screw rod 7 and a motor 8; The bidirectional screw 7 is rotatably installed in the top of the test bench 1, and the bidirectional screw 7 is threadedly connected with the transmission block 6. When the bidirectional screw 7 rotates, the transmission block 6 is restricted by the slide groove and cannot rotate because a slide groove for sliding the transmission block 6 is provided in the top of the test bench 1. As a result, the transmission block 6 starts to slide back and forth on the test bench 1 under the action of the bidirectional screw 7, so that the tripod 10 drives the test wheel 12 to perform a bending test on the endoscope 2. A motor 8 connected to the bidirectional screw rod 7 is installed on the outer wall of the test bench 1 for driving the bidirectional screw rod 7 to rotate.

[0037] See also Fig. 9 - Fig.11 A limiting groove 11 corresponding to the transmission block 6 is provided at the end of the tripod 10. Because the top of the transmission block 6 is located in the limiting groove 11, when the transmission block 6 slides, the limiting groove 11 is set so that the transmission block 6 will synchronously push the limiting groove 11 and the rotating block 9. At the same time, the limiting groove 11 will also support the top of the transmission block 6 to prevent it from being deformed after long-term use, and further ensure that the transmission block 6 can smoothly push the rotating block 9 and the tripod 10 to move when sliding.

[0038] See also Figure 1 , a plurality of groups of load-bearing frames 13 connected to the first support frame 14 and the second support frame 15 are symmetrically installed on the top of the test bench 1. When the load-bearing frame 13 is connected to the first support frame 14 and the second support frame 15, the fixed position of the first support frame 14 and the second support frame 15 during use is effectively ensured. At the same time, because the distance between the inner walls on both sides of the load-bearing frame 13 and the outer walls of the first support frame 14 and the second support frame 15 is greater than the distance between the middle test wheels 12 of the test mechanism, the test mechanism will not cause the endoscope 2 to contact with the load-bearing frame 13 during use, thereby preventing the setting of the load-bearing frame 13 from affecting the test; Because the first support frame 14 and the second support frame 15 are located on the same horizontal plane, the testing mechanism can ensure stability during sliding whether it is below the first support frame 14 or below the second support frame 15, and the distance between the first support frame 14 and the second support frame 15 is the same as the distance between the first support frame 14 and the second support frame 15 and the test bench 1, ensuring that the testing mechanism will be restricted by the first support frame 14 and the second support frame 15 when sliding between the first support frame 14 and the second support frame 15.

[0039] For example, Figure 6 - Fig.11 As shown, the transmission mechanism further includes a rectangular slot 161, a guide cylinder 162, a coupling slot 163, a main gear 17, a slave gear 18 and a protrusion 201; Specifically, a guide cylinder 162 is fixedly installed at the end of the transmission rod 16 close to the driving rod 20, and a rectangular groove 161 corresponding to the driving rod 20 is opened through the guide cylinder 162 and the transmission rod 16, ensuring that the driving rod 20 can be smoothly slidably connected with the transmission rod 16. At the same time, through the setting of the rectangular groove 161, it is ensured that the driving rod 20 can smoothly drive the transmission rod 16 to rotate. Furthermore, the rectangular groove 161 in the guide tube 162 is designed to be open outward, making it easier for the drive rod 20 to enter the rectangular groove 161; Specifically, the main gear 17 is installed on the outer wall of the transmission rod 16. When the transmission rod 16 rotates, it drives the main gear 17 to rotate synchronously. At the same time, multiple groups of slave gears 18 meshing with the main gear 17 are installed at equal angles on the outer wall of the end of the rotating block 9, so that when the transmission rod 16 rotates, the main gear 17 drives the rotating block 9 to rotate through the slave gear 18. At the same time, the main gear 17 and the slave gear 18 are defined as follows: when the main gear 17 rotates one circle, the slave gear 18 will rotate half a circle; Specifically, a protrusion 201 is fixedly installed on the outer wall of the driving rod 20, and a coupling groove 163 corresponding to the protrusion 201 is opened in the guide tube 162 and the transmission rod 16, and the coupling groove 163 is connected to the rectangular groove 161. When the driving rod 20 enters the rectangular groove 161, the protrusion 201 will synchronously enter the coupling groove 163, and the coupling groove 163 corresponds to the position of the protrusion 201 only when the tripod 10 is located below the first support frame 14, so that when the tripod 10 is located below the second support frame 15 or between the first support frame 14 and the second support frame 15, the positions of the coupling groove 163 and the protrusion 201 are in a staggered state, so that the driving rod 20 will be coupled with the rectangular groove 161 only when the tripod 10 moves below the first support frame 14.

[0040] See also Fig.11The cross-section of the driving rod 20 is designed to be T-shaped, so that the driving rod 20 will slide into the transmission column 19 when squeezed by the protrusion 201. At the same time, because a spring 21 fixedly connected to the transmission column 19 is installed at the end of the driving rod 20, the spring 21 will be squeezed by the driving rod 20. When the protrusion 201 starts to slide away from the transmission column 19, the spring 21 will push the driving rod 20 to its original position. At the same time, the driving rod 20 will also be restricted by the transmission column 19, ensuring the stability of the sliding of the driving rod 20 and ensuring that the driving rod 20 cannot slide out of the transmission column 19.

[0041] See also Figure 5 - Fig.12 , the second driving mechanism is composed of a flat gear 22, a rack 23 and an electric push rod 24; Among them, the flat gear 22 is fixedly installed on the outer wall of the transmission column 19, so that the transmission column 19 and the flat gear 22 will move synchronously, and at the same time, a rack 23 meshing with the flat gear 22 is slidably installed in the test bench 1, and an electric push rod 24 connected to the rack 23 is installed in the test bench 1. When the electric push rod 24 is started, the rack 23 starts to slide, and the flat gear 22 will obtain the power to rotate, ensuring that the transmission column 19 can smoothly drive the driving rod 20 to rotate; Exemplarily, a push-type wireless switch 25 is installed on the outer wall of the driving rod 20, and a wireless switch receiver 26 corresponding to the push-type wireless switch 25 is installed on the electric push rod 24. When the end of the driving rod 20 passes through the transmission rod 16, the push-type wireless switch 25 will enter the rectangular groove 161. Because the end of the push-type wireless switch 25 protrudes from the outer wall of the driving rod 20, the push-type wireless switch 25 will be squeezed (the switch position of the push-type wireless switch 25 is an elastic push switch, and the specific working principles of the push-type wireless switch 25 and the wireless switch receiver 26 are both prior art, so no more description will be made again); As the transmission block 6 continues to slide toward the transmission column 19, the end of the driving rod 20 passes through the rectangular groove 161 until the push-type wireless switch 25 is separated from the rectangular groove 161. At this time, the push-type wireless switch 25 will rebound and start to transmit signals to the wireless switch receiver 26. At this time, the wireless switch receiver 26 will start the electric push rod 24, so that the electric push rod 24 will automatically start after the end of the driving rod 20 passes through the transmission rod 16. At the same time, the extension length of the electric push rod 24 after each start is the same. After the electric push rod 24 is started, the flat gear 22 will rotate 360°, ensuring that the rotating block 9 will rotate 180° under the action of the main gear 17 and the slave gear 18; When the transmission block 6 starts to slide toward its starting position, because the opening position of the rectangular groove 161 in the transmission rod 16 is also designed to be outwardly opened, the opening of the rectangular groove 161 will re-squeeze the top of the push-type wireless switch 25, causing the push-type wireless switch 25 to re-enter the rectangular groove 161. When the push-type wireless switch 25 is separated from the rectangular groove 161 again, the end of the driving rod 20 has already run to the rectangular groove 161 located in the guide tube 162. Because the rectangular groove 161 in the guide tube 162 is larger than the driving rod 20, and because the distance between the push-type wireless switch 25 and the end of the driving rod 20 is less than the length of the guide tube 162, the rectangular groove 161 in the guide tube 162 has space for the driving rod 20 to rotate. At this time, after the push-type wireless switch 25 transmits a signal to the wireless switch receiver 26, the wireless switch receiver 26 controls the electric push rod 24 to start to shrink, causing the driving rod 20 and the transmission column 19 to rotate back to their original angles.

[0042] For example, Fig.12 As shown, a battery 251 corresponding to the push-type wireless switch 25 is installed in the driving rod 20 for powering the push-type wireless switch 25. At the same time, a round hole charging head 252 corresponding to the battery 251 is also installed at the end of the driving rod 20 to facilitate the user to charge the battery 251.

[0043] See also Figure 1 and Fig.13 and Fig.14 A shielding rod 27 for shielding the test mechanism is rotatably mounted at the end of the first support frame 14, and the shielding rod 27 is limited to be able to rotate only in the direction of the end of the second support frame 15, so that when the second driving mechanism drives the test mechanism to rotate, the shielding rod 27 will start to rotate under the pressure of the test mechanism, and because a torsion spring box 28 for resetting the shielding rod 27 is installed on the top of the first support frame 14, the torsion spring in the torsion spring box 28 will be stressed, and when the test mechanism is in the process of rotating, it will separate from the shielding rod 27, causing the shielding rod 2 7 is reset under the action of the torsion spring, at which time the end of the shielding rod 27 will be in contact with the outer wall of the top end of the test bench 1. When the test mechanism slides out from under the second support frame 15 and starts to automatically change its angle, at this time, the two ends of the shielding rod 27 will be supported and restricted by the test bench 1 and the first support frame 14, shielding the test mechanism, so that after the test mechanism slides out from under the second support frame 15, it can only rotate 90°, ensuring that the test mechanism will slide between the first support frame 14 and the second support frame 15 to test the endoscope 2.

[0044] The working principle of the present invention is as follows: when the endoscope 2 needs to be tested, the endoscope 2 is first installed in the tripod 10, so that the outer wall of the endoscope 2 contacts the balls 121 on the outer walls of the plurality of rollers 122 respectively, and the contact positions of the endoscope 2 and the balls 121 are bent, and then the two ends of the endoscope 2 are placed in the positioning grooves 3, and then the handle 4 is turned so that the pressing block 5 fixes the two ends of the endoscope 2; Next, the motor 8 is started, so that the bidirectional screw 7 starts to rotate, and under the action of the screw principle, the transmission block 6 starts to drive the test mechanism to slide, and the test wheel 12 in the test mechanism will bend different positions of the endoscope 2, so that the present invention can perform bending tests on different positions of the endoscope 2 when in use. At the same time, the roller 122 will contact the top of the test bench 1 and the bottom of the first support frame 14 to ensure the stability of the test mechanism during the sliding process; During this process, as the transmission block 6 slides toward the transmission column 19, the driving rod 20 will gradually enter the rectangular groove 161, and the protrusion 201 will also synchronously enter the coupling groove 163, and the push-type wireless switch 25 will follow closely and enter the rectangular groove 161. When the transmission block 6 slides to be completely located under the shielding rod 27, the end of the driving rod 20 will pass through the rectangular groove 161, and the push-type wireless switch 25 will then slide out, causing the electric push rod 24 to start, which will push the rack 23. At this time, the flat gear 22 starts to drive the transmission column 19 to rotate. At this time, the transmission The column 19 will drive the transmission rod 16 to rotate through the driving rod 20, so that the rotating block 9 drives the tripod 10 to rotate 180 degrees, so that the test position of the endoscope 2 by the test wheel 12 is changed. In this process, the torsion spring at the rotation connection position of the rotating block 9 and the transmission block 6 will be subjected to pressure. However, since the rotating block 9 is subjected to the pressure given by the transmission rod 16 at this time, it cannot be driven by the torsion spring to rotate. Since the bidirectional screw rod 7 is still in a rotating state at this time, the transmission block 6 starts to slide toward its starting position. During the sliding process, the test wheel 12 will bend different positions of the endoscope 2. The driving rod 20 will not be separated from the rectangular slot 161 until the transmission block 6 drives the tripod 10 to slide to the bottom of the second support frame 15. At this time, the tripod 10 is restricted by the second support frame 15 and still cannot rotate. When the transmission block 6 drives the tripod 10 to completely slide out from under the second support frame 15, the torsion spring drives the tripod 10 to rotate through the rotating block 9. Since the blocking rod 27 is installed at the end of the first support frame 14, the tripod 10 can only rotate 90°, so that the test angle of the test wheel 12 to the endoscope 2 is changed again, so that the present invention can detect different positions of the entire endoscope 2, and the detection efficiency is greatly improved. It should be noted that after the driving rod 20 is separated from the rectangular groove 161, the electric push rod 24 will start again and start to drive the rack 23 to reset, thereby causing the driving rod 20 and the protrusion 201 to rotate back to their original angles. When the tripod 10 slides in the direction of the driving rod 20 under the second support frame 15, the transmission rod 16 will also change its angle synchronously after the tripod 10 rotates, so that the positions of the rectangular groove 161 and the protrusion 201 are staggered at this time, thereby making it impossible for the driving rod 20 to enter the rectangular groove 161, and at this time the driving rod 20 will not rotate synchronously with the transmission rod 16; When the tripod 10 slides out of the other end of the first support frame 14, the torsion spring will drive the tripod 10 to rotate 90° again, causing the tripod 10 to rotate back to the initial state, and then the endoscope 2 is continuously bent tested in the above manner to achieve efficient testing of the bending fatigue of the endoscope 2.

[0045] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An endoscope bending fatigue strength testing device, characterized in that: The apparatus comprises a test bench (1), an endoscope (2) and a holder, wherein the holder is mounted on the top of the test bench (1) and is used to fix the two ends of the endoscope (2); a transmission block (6) is slidably mounted on the top of the test bench (1), and a first driving mechanism corresponding to the transmission block (6) is arranged inside the top of the test bench (1) and is used to drive the transmission block (6) to reciprocate inside the top of the test bench (1); A testing mechanism for testing the endoscope (2) is rotatably mounted on the top of the transmission block (6), the testing mechanism comprising a rotating block (9) rotatably mounted on the top of the transmission block (6), a tripod (10) fixedly mounted on the end of the rotating block (9), and a testing wheel (12) rotatably mounted on the tripod (10), wherein the testing wheel (12) is used to bend the endoscope (2), and a torsion spring corresponding to the testing mechanism is arranged inside the top of the transmission block (6); A first support frame (14) and a second support frame (15) for limiting the movement of the test mechanism are arranged above the test bench (1), and the installation positions of the first support frame (14) and the second support frame (15) are staggered, and the distances between the ends of the first support frame (14) and the second support frame (15) and the top side wall of the test bench (1) are both greater than the length of the test mechanism; A transmission mechanism is arranged in the transmission block (6) for driving the test mechanism to rotate, a transmission column (19) is rotatably mounted on the top of the test bench (1), and a driving rod (20) is slidably mounted in the end of the transmission column (19), the transmission mechanism includes a transmission rod (16) rotatably mounted in the transmission block (6), and the transmission mechanism is slidably connected to the driving rod (20) through the transmission rod (16), and the transmission mechanism is driven by the driving rod (20), and the transmission rod (16) is limited to being slidably connected to the driving rod (20) only when the test mechanism is located below the first support frame (14); A second driving mechanism for driving the transmission column (19) to rotate is arranged inside the top of the test bench (1), and the second driving mechanism is limited to being started only after the transmission rod (16) and the driving rod (20) are slidably connected.

2. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: The fixture is composed of a positioning groove (3), a handle (4) and a pressing block (5); the top outer wall of the test bench (1) is provided with two groups of positioning grooves (3) for mounting the endoscope (2); a pressing block (5) for fixing the endoscope (2) is slidably mounted inside the top outer wall of the test bench (1); and a handle (4) rotatably connected to the pressing block (5) is bolted to the top of the test bench (1).

3. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: The first driving mechanism is composed of a bidirectional screw (7) and a motor (8); the bidirectional screw (7) is rotatably mounted in the top of the test bench (1), and the bidirectional screw (7) is threadedly connected to the transmission block (6); a slide groove for the transmission block (6) to slide is provided in the top of the test bench (1), and the motor (8) connected to the bidirectional screw (7) is mounted on the outer wall of the test bench (1).

4. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: A limiting groove (11) corresponding to the transmission block (6) is formed at the end of the tripod (10), and the top end of the transmission block (6) is located in the limiting groove (11).

5. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: The testing mechanism further comprises balls (121) and rollers (122); a plurality of groups of balls (121) in contact with the outer wall of the endoscope (2) are mounted at equal angles on the outer wall of the testing wheel (12); a plurality of groups of rollers (122) are symmetrically mounted on the outer walls of both sides of the tripod (10); and during the movement of the testing mechanism, the rollers (122) are in contact with the testing table (1) and the first support frame (14) and the second support frame (15), respectively.

6. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: A plurality of groups of load-bearing frames (13) connected to a first support frame (14) and a second support frame (15) are symmetrically mounted on the top of the test bench (1), and the first support frame (14) and the second support frame (15) are located on the same horizontal plane.

7. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: The transmission mechanism further comprises a rectangular groove (161), a guide tube (162), a coupling groove (163), a main gear (17), a slave gear (18) and a protrusion (201); the guide tube (162) is fixedly mounted on the end of the transmission rod (16) close to the driving rod (20); a rectangular groove (161) corresponding to the driving rod (20) is penetrated through the guide tube (162) and the transmission rod (16); and the rectangular groove (161) in the guide tube (162) is designed to be outwardly open; The main gear (17) is mounted on the outer wall of the transmission rod (16), and a plurality of groups of slave gears (18) meshing with the main gear (17) are mounted at equal angles on the outer wall of the end of the rotating block (9); A protrusion (201) is fixedly mounted on the outer wall of the driving rod (20), and a coupling groove (163) corresponding to the protrusion (201) is provided in the guide tube (162) and the transmission rod (16), and the coupling groove (163) corresponds to the position of the protrusion (201) only when the tripod (10) is located below the first support frame (14).

8. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: The driving rod (20) has a T-shaped cross section, and a spring (21) fixedly connected to the transmission column (19) is installed at the end of the driving rod (20).

9. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: The second driving mechanism is composed of a spur gear (22), a rack (23) and an electric push rod (24); the spur gear (22) is fixedly mounted on the outer wall of the transmission column (19); a rack (23) meshingly connected to the spur gear (22) is slidably mounted in the test bench (1); and an electric push rod (24) connected to the rack (23) is mounted in the test bench (1); the electric push rod (24) is started after the end of the driving rod (20) passes through the transmission rod (16).

10. The endoscope bending fatigue strength testing device according to claim 1, characterized in that: A shielding rod (27) for shielding the test mechanism is rotatably mounted on the end of the first support frame (14), and the shielding rod (27) is limited to being able to rotate only in the direction of the end of the second support frame (15), and a torsion spring box (28) for resetting the shielding rod (27) is mounted on the top of the first support frame (14).

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