CN218180241U - Elastic ball testing device - Google Patents
Elastic ball testing device Download PDFInfo
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- CN218180241U CN218180241U CN202222297581.2U CN202222297581U CN218180241U CN 218180241 U CN218180241 U CN 218180241U CN 202222297581 U CN202222297581 U CN 202222297581U CN 218180241 U CN218180241 U CN 218180241U
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Abstract
The utility model discloses an elastic ball testing arrangement relates to basketball technical field, has the advantage of collecting the basketball after detecting, and its technical scheme main points are: including fixed plate and the test section of thick bamboo of vertical setting on the fixed plate, the top nozzle of test section of thick bamboo is sealed through the apron, and the bottom of apron is equipped with distance sensor, the outer wall top of test section of thick bamboo is equipped with the goal mouth with test section of thick bamboo intercommunication, outer wall one side of test section of thick bamboo is equipped with and is used for promoting the basketball to goal mouth department and push the promotion piece in the test section of thick bamboo through the goal mouth, the outer wall below of test section of thick bamboo is equipped with the play ball mouth with test section of thick bamboo intercommunication, one side that the fixed plate is close to the play ball mouth is equipped with the collection box, be equipped with the removal dish that is located test section of thick bamboo on the fixed plate, be equipped with on the fixed plate and be used for promoting to remove the dish level and shift out the impeller outside the test section of thick bamboo through a ball mouth, the top of removal dish is equipped with rubber buffer layer.
Description
Technical Field
The utility model relates to a basketball technical field specifically is an elastic ball testing arrangement.
Background
Basketball, a physical opponent sport that is centered on the hands, is the core game of the olympic games.
At present, chinese patent with application number on the market CN201710493298.8 discloses a basketball elasticity testing arrangement, comprising a base plate, the telescopic link is installed through the bolt in top one side of bottom plate, the horizontal pole is installed at the top of telescopic link, distance sensor is installed to bottom one side of horizontal pole, the telescopic link is kept away from at the top of bottom plate and the revolving cylinder is installed, and there is pressure sensor above the opening through the support mounting, pressure sensor's output sets up down, and pressure sensor's bottom is fixed with the spring, the lower extreme of spring is fixed with supports the clamp plate, the both sides that support the clamp plate are equipped with first baffle and second baffle respectively, and first baffle and second baffle establish the bottom both sides at the mounting panel, the push rod motor is installed to one side that the second baffle is close to first baffle, and push rod motor and second baffle mutually perpendicular mutually, and the one end that the second baffle was kept away from to the push rod motor is installed the third baffle. However, when the basketball stand is used, the distance sensor needs a user to manually catch the basketball after detecting the maximum distance after the basketball rebounds, and the use is inconvenient, so the utility model provides a solution.
SUMMERY OF THE UTILITY MODEL
The technique that exists is not enough to the aforesaid, the utility model aims at providing an elastic ball testing arrangement has the advantage of collecting the basketball after detecting.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides an elastic ball testing arrangement, including fixed plate and the test section of thick bamboo of vertical setting on the fixed plate, the top nozzle of a test section of thick bamboo is sealed through the apron, and the bottom of apron is equipped with distance sensor, the outer wall top of a test section of thick bamboo is equipped with the goal mouth with a test section of thick bamboo intercommunication, outer wall one side of a test section of thick bamboo is equipped with and is used for promoting the basketball to goal department and push the promotion piece in the test section of thick bamboo through the goal mouth with the basketball, the outer wall below of a test section of thick bamboo is equipped with the outlet with a test section of thick bamboo intercommunication, one side that the fixed plate is close to the outlet is equipped with the collection box, be equipped with the removal dish that is located the test section of thick bamboo on the fixed plate, be equipped with on the fixed plate and be used for promoting the removal dish level and shift out the impeller outside the test section of thick bamboo through the outlet, the top of removal dish is equipped with rubber buffer layer.
Through adopting above-mentioned technical scheme, the initial position of removal dish is located outside the test tube, during the use, the user only needs to promote the basketball to goal department and push the basketball into the test tube through the goal, the basketball then can be influenced by gravity and drop down this moment, the basketball bounces after basketball and fixed plate contact, distance sensor detects the maximum distance behind the basketball bounce, thereby obtain the height that the basketball bounced, can restrict the bounce direction of basketball through the test tube, reduce and take place because of basketball bounce direction changes, the basketball is forward or backward or left or right pop-up the condition of distance sensor detection range takes place, when detecting to accomplish and the basketball bounces falls once more, the user promotes the removal dish through the impeller and gets into the test tube from the goal, the basketball that detects the back whereabouts then can contact with the rubber buffer layer this moment, cushion the basketball through the rubber buffer layer this moment, until the impeller stops on the rubber buffer layer stops on the basketball, then the user promotes the removal dish level and shifts out to the test tube through the goal through the impeller and then can drive the rubber buffer layer, the basketball passes through the mouth and rolls to the artifical buffering layer that the basketball rolls on the collection box, this moment, the basketball is convenient.
Preferentially, the top of apron is equipped with two first cylinders, and the piston rod one end of two first cylinders is vertical to be passed the apron and to be connected through the shift ring, the shift ring level sets up, the bottom of shift ring is equipped with a plurality of compression spring, and the bottom of each compression spring passes through the clamping ring to be connected, the clamping ring level sets up and contradicts with the top of basketball, this moment be equipped with in the test section of thick bamboo and be used for carrying out the support piece that supports to the basketball, and support piece is located the below of goal.
Preferentially, support piece includes two backup pads and sets up the recess in the relative both sides of test section of thick bamboo, two the one end of backup pad is passed two recesses respectively and is located the test section of thick bamboo and contradict each other, two this moment the equal level of backup pad sets up, two one side that the backup pad deviates from each other all is equipped with the push pedal that is located outside the test section of thick bamboo, the equal level of one end that the test section of thick bamboo outer wall is close to the push pedal is equipped with the second cylinder, and the piston rod one end of second cylinder all with push pedal one side fixed connection.
Preferentially, the lifting part is including setting up the vertical board in test section of thick bamboo outer wall one side, and vertical board is located the below of goal, vertical board deviates from the vertical rectangular shape spout that is equipped with in one side of test section of thick bamboo, and the vertical slide is connected with the slider in the spout, rotate between two cell walls relative from top to bottom in the spout and be connected with the lead screw, and the one end of lead screw pass the slider and with slider threaded connection, the bottom of vertical board is equipped with and is used for driving lead screw pivoted motor, the slider deviates from the vertical mounting panel that is equipped with in one side of spout tank bottom, and the mounting panel deviates from one side top of slider and is equipped with the board of placing to one side, and places and be equipped with two relative baffles on the board.
Preferentially, the vertical board is gone up the vertical rectangular shape and is equipped with two stable grooves of strip shape, the one end of placing the board and being close to stable groove all is equipped with the sliding block that is located stable inslot, two vertically between two cell walls of the upper and lower of stable groove is equipped with the traveller, two the logical groove that is used for supplying the vertical pass of traveller one end is all seted up on the top of sliding block.
Preferably, the pushing part comprises a pulling plate which is horizontally connected to the fixed plate in a sliding manner, a connecting rod is horizontally arranged on one side of the pulling plate, one end, far away from the pulling plate, of the connecting rod is fixedly connected with one side of the moving plate, and a third air cylinder used for pushing the pulling plate to move horizontally is arranged on the fixed plate.
The beneficial effects of the utility model reside in that: the initial position of the movable disc is located outside the testing cylinder, when the movable disc is used, a user only needs to lift a basketball to a basketball inlet through a lifting piece and push the basketball into the testing cylinder through the basketball inlet, at the moment, the basketball can drop downwards under the influence of gravity, the basketball bounces after being contacted with the fixed plate, the distance sensor detects the maximum distance after the basketball bounces, the bounced height of the basketball is obtained, the rebounded direction of the basketball can be limited through the testing cylinder, the situation that the basketball bounces within the detection range of the distance sensor forwards or backwards or leftwards or rightwards is reduced, when the basketball bounces after being detected is completed and falls again, the user pushes the movable disc to enter the testing cylinder from the basketball outlet through the pushing piece, the basketball falling basketball can be contacted with the rubber buffer layer after being detected, the basketball is buffered through the rubber buffer layer at the moment until the basketball stays on the rubber buffer layer, then the pushing piece horizontally moves out of the movable disc through the basketball outlet and moves out of the testing cylinder, at the moment, the movable disc can drive the rubber buffer layer, the basketball moves out of the basketball and then rolls to the interior of the rubber buffer layer when the basketball stops, and the user, the basketball can roll to the manual work, and the basketball can be collected on the rubber buffer layer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a schematic structural diagram of a placement board according to the present embodiment;
FIG. 3 is a schematic structural diagram of the present embodiment for embodying the supporting plate;
fig. 4 is a schematic structural diagram of the spool according to the present embodiment.
Description of reference numerals:
in the figure: 1. a fixing plate; 2. a test cartridge; 3. a cover plate; 4. a distance sensor; 5. a ball inlet; 6. a ball outlet; 7. a collection box; 8. a movable tray; 9. a rubber buffer layer; 10. a first cylinder; 12. a moving ring; 13. a compression spring; 14. pressing a ring; 15. a support plate; 16. a groove; 17. pushing the plate; 18. a second cylinder; 19. a vertical plate; 20. a chute; 21. a slider; 22. a screw rod; 23. a motor; 24. mounting a plate; 25. placing the plate; 26. a baffle plate; 27. a stabilizing slot; 28. a slider; 29. a traveler; 30. a through groove; 31. a reinforcing bar; 32. pulling a plate; 33. a connecting rod; 34. a third cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides an elastic ball testing arrangement, as shown in fig. 1 and fig. 2, including fixed plate 1 and the test section of thick bamboo 2 of vertical setting on fixed plate 1, the top nozzle of test section of thick bamboo 2 seals through apron 3, and the bottom of apron 3 is equipped with distance sensor 4, the outer wall top of test section of thick bamboo 2 is equipped with the goal 5 with test section of thick bamboo 2 intercommunication, outer wall one side of test section of thick bamboo 2 is equipped with and is used for promoting the basketball to goal 5 departments and with the basketball through the promotion piece that the goal 5 pushed into test section of thick bamboo 2 in, the diameter of test section of thick bamboo 2 is greater than the diameter of basketball, the outer wall below of test section of thick bamboo 2 is equipped with the play ball mouth 6 with test section of thick bamboo 2 intercommunication, one side that fixed plate 1 is close to play ball mouth 6 is equipped with collection box 7, be equipped with the removal dish 8 that is located test section of thick bamboo 2 on fixed plate 1, be equipped with on fixed plate 1 and be used for promoting removal dish 8 level and shift out the impeller outside test section of thick bamboo 2 through play ball mouth 6, the top of removal dish 8 is equipped with rubber buffer layer 9.
If fig. 1 and fig. 2, the initial position of the movable plate 8 is located outside the testing cylinder 2, when in use, the user only needs to lift the basketball to the ball inlet 5 through the lifting piece and push the basketball into the testing cylinder 2 through the ball inlet 5, at this time, the basketball falls downward under the influence of gravity, the basketball bounces after contacting with the fixed plate 1, the distance sensor 4 detects the maximum distance after the basketball rebounds, thereby obtaining the height of the basketball bounces, the bounce direction of the basketball can be limited through the testing cylinder 2, the situation that the basketball bounces in the range of the distance sensor 4 forward or backward or leftward or rightward is reduced, when the detection is completed and the basketball bounces fall, the user pushes the movable plate 8 to enter the testing cylinder 2 from the ball outlet 6 through the pushing piece, at this time, the basketball falling basketball can contact with the rubber buffer layer 9 after the detection is completed can be buffered through the rubber buffer layer 9, the basketball stays on the rubber buffer layer 9 until the basketball stops on the rubber buffer layer 9, then the user can move the basketball through the rubber buffer layer 9 when the pushing piece 8 horizontally passes through the ball outlet 6 and then moves out to the rubber buffer layer, the user can move out of the basketball, the user can move the basketball from the rubber buffer layer 9, when the basketball collection box, the basketball can be collected from the rubber buffer layer 2, the basketball, and the basketball can be collected on the basketball, and the basketball collection surface, the basketball can be collected by rolling from the rubber buffer layer 2, and then, when the basketball.
As shown in fig. 1, the pushing member includes a pulling plate 32 horizontally slidably connected to the fixed plate 1, a connecting rod 33 is horizontally disposed on one side of the pulling plate 32, one end of the connecting rod 33 far away from the pulling plate 32 is fixedly connected to one side of the movable plate 8, and a third cylinder 34 for pushing the pulling plate 32 to move horizontally is disposed on the fixed plate 1.
As shown in fig. 1 and 2, the top end of the cover plate 3 is provided with two first cylinders 10, one end of a piston rod of each first cylinder 10 vertically penetrates through the cover plate 3 and is connected with the basketball through a moving ring 12, the moving ring 12 is horizontally arranged, the bottom end of the moving ring 12 is provided with a plurality of compression springs 13, the bottom end of each compression spring 13 is connected with a pressing ring 14, the pressing ring 14 is horizontally arranged and is abutted against the top of the basketball, a support member for supporting the basketball is arranged in the testing cylinder 2 at the moment, the support member is positioned below a basketball inlet 5, the basketball entering the testing cylinder 2 through the basketball inlet 5 can be supported through the support member, then a user opens the two first cylinders 10, the piston rods of the two first cylinders 10 can push the moving ring 12, the compression springs 13 and the compression springs 14 move downwards until the pressing ring 14 is above the basketball, each compression spring 13 is compressed, pressure can be provided for the basketball can be provided for abutting against the basketball, the basketball is positioned on a central axis of the testing cylinder 2, then the support member can release the basketball, the basketball can drop into the basketball, and can be conveniently dropped, and the basketball can be dropped into the basketball falling basketball barrel after the basketball is simply dropped, and the basketball falls, and the basketball can be directly dropped, and the basketball can be tested, and the basketball can be conveniently dropped.
As shown in fig. 2 and 3, the supporting member includes two supporting plates 15 and grooves 16 formed in two opposite sides of the testing cylinder 2, one end of each of the two supporting plates 15 penetrates through the two grooves 16 and is located in the testing cylinder 2 and abutted against each other, at this time, the two supporting plates 15 are arranged horizontally, one side, deviating from each other, of the two supporting plates 15 is provided with a push plate 17 located outside the testing cylinder 2, one end, close to the push plate 17, of the outer wall of the testing cylinder 2 is provided with a second cylinder 18 horizontally, one end of a piston rod of the second cylinder 18 is fixedly connected with one side of the push plate 17, the purpose of the arrangement is that when a basketball enters the testing cylinder 2 through the basketball inlet 5, the basketball can be located on the two supporting plates 15, at this time, the two supporting plates 15 are in contact with each other, a user can drive the two supporting plates 15 to be away from each other through the push plate 17 by opening the two second cylinders 18, until one ends, close to each other, of the two supporting plates 15 are moved into the grooves 16, at this time, the support for the basketball can be released, and the use is simple and convenient.
If fig. 1 and fig. 2, the lifting member includes the vertical board 19 that sets up in test section of thick bamboo 2 outer wall one side, and the vertical board 19 is located the below of goal 5, one side that vertical board 19 deviates from test section of thick bamboo 2 is vertical to be equipped with rectangular shape spout 20, and vertical slip is connected with slider 21 in the spout 20, it is connected with lead screw 22 to rotate between two cell walls relative from top to bottom in the spout 20, and the one end of lead screw 22 passes slider 21 and with slider 21 threaded connection, the bottom of vertical board 19 is equipped with and is used for driving lead screw 22 pivoted motor 23, slider 21 deviates from the vertical one side of spout 20 tank bottom and is equipped with mounting panel 24, and mounting panel 24 is equipped with on the one side top slant that deviates from slider 21 and places board 25, and is equipped with two relative baffles 26 on placing board 25, the purpose of this setting lies in that the user places the basketball between two baffles 26 on placing board 25 through placing the basketball, because of placing board 25 tilt up at this moment, so one end of basketball can then contact with one side of vertical board 19, then the user can drive the rotation of basketball through opening motor 23 and then can drive the vertical board 21 and can drive the slider 21 and can move when the basketball goal when the basketball moves, so the basketball goal is located the vertical slide and the vertical board 21 and can move, then can be connected to move when the basketball goal when the basketball is vertical board 21, then can be convenient to move, then can be moved, basketball goal when the basketball goal is to move, then can be located the basketball goal when the basketball is vertical slide in the basketball goal 5 through the vertical board 21 and the basketball.
As shown in fig. 1 and 4, two elongated stabilizing grooves 27 are vertically arranged on the vertical plate 19, one end of the placement plate 25 close to the stabilizing grooves 27 is provided with a sliding block 28 located in the stabilizing grooves 27, a sliding column 29 is vertically arranged between the upper and lower groove walls of the two stabilizing grooves 27, the top ends of the two sliding blocks 28 are provided with a through groove 30 through which one end of the sliding column 29 vertically passes, the purpose of the arrangement is that when the sliding block 21 vertically slides in the sliding groove 20, the sliding block 21 drives the mounting plate 24, the placement plate 25, the two baffle plates 26 and the basketball move, the placement plate 25 can drive the two sliding blocks 28 to slide in the stabilizing grooves 27 along the length direction of the sliding column 29 through the through groove 30, the stability of the placement plate 25 during moving can be increased through the matching of the stabilizing grooves 27 and the through grooves 28 and the through grooves 30 and the sliding column 29, the lower side of the mounting plate 24 is connected with one end of the placement plate 25 far away from the mounting plate 24 through a reinforcing rod 31, and the situation that the placement plate 25 is bent and deformed can be reduced through the reinforcing rod 31, and the use is simple and convenient.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides an elastic ball testing arrangement, its characterized in that, includes fixed plate (1) and the test section of thick bamboo (2) of vertical setting on fixed plate (1), the top nozzle of test section of thick bamboo (2) is sealed through apron (3), and the bottom of apron (3) is equipped with distance sensor (4), the outer wall top of test section of thick bamboo (2) is equipped with into goal (5) of intercommunication with test section of thick bamboo (2), outer wall one side of test section of thick bamboo (2) is equipped with and is used for promoting the basketball to goal (5) department and push the basketball through goal (5) and promote the piece in test section of thick bamboo (2), the outer wall below of test section of thick bamboo (2) is equipped with play ball mouth (6) with test section of thick bamboo (2) intercommunication, one side that fixed plate (1) is close to play ball mouth (6) is equipped with collection box (7), be equipped with removal dish (8) that are located test section of thick bamboo (2) on fixed plate (1), be equipped with on fixed plate (1) and be used for promoting removal dish (8) level and shift out through play ball mouth (6) and shift out the top of test section of thick bamboo (2), the impeller (9) are equipped with the buffer layer (9).
2. An elastic sphere testing device according to claim 1, wherein the top end of the cover plate (3) is provided with two first air cylinders (10), one ends of the piston rods of the two first air cylinders (10) vertically penetrate through the cover plate (3) and are connected through a moving ring (12), the moving ring (12) is horizontally arranged, the bottom end of the moving ring (12) is provided with a plurality of compression springs (13), the bottom ends of the compression springs (13) are connected through a pressing ring (14), the pressing ring (14) is horizontally arranged and abuts against the upper part of the basketball, and a support member for supporting the basketball is arranged in the testing cylinder (2) and is located below the ball inlet (5).
3. The elastic sphere testing device as claimed in claim 2, wherein the supporting member comprises two supporting plates (15) and grooves (16) formed in two opposite sides of the testing cylinder (2), one ends of the two supporting plates (15) respectively penetrate through the two grooves (16) and are located in the testing cylinder (2) and mutually abutted, the two supporting plates (15) are both horizontally arranged, one sides of the two supporting plates (15) which are mutually deviated are both provided with push plates (17) located outside the testing cylinder (2), one ends of the outer walls of the testing cylinder (2) close to the push plates (17) are both horizontally provided with second air cylinders (18), and one ends of piston rods of the second air cylinders (18) are both fixedly connected with one sides of the push plates (17).
4. The elastic sphere testing device as claimed in claim 1, wherein the lifting member includes a vertical plate (19) disposed on one side of an outer wall of the testing cylinder (2), the vertical plate (19) is located below the ball inlet (5), an elongated sliding groove (20) is vertically disposed on one side of the vertical plate (19) facing away from the testing cylinder (2), a sliding block (21) is connected in the sliding groove (20) in a vertically sliding manner, a lead screw (22) is rotatably connected between two vertically opposite groove walls in the sliding groove (20), one end of the lead screw (22) penetrates through the sliding block (21) and is in threaded connection with the sliding block (21), a motor (23) for driving the lead screw (22) to rotate is disposed at a bottom end of the vertical plate (19), a mounting plate (24) is vertically disposed on one side of the sliding block (21) facing away from a groove bottom of the sliding groove (20), a placing plate (25) is disposed on one side of the mounting plate (24) facing away from the sliding block (21) in an inclined upward direction, and two opposite baffles (26) are disposed on the placing plate (25).
5. An elastic ball testing device according to claim 4, wherein two long-strip-shaped stabilizing grooves (27) are vertically arranged on the vertical plate (19), sliding blocks (28) located in the stabilizing grooves (27) are respectively arranged at one end of the placing plate (25) close to the stabilizing grooves (27), sliding columns (29) are vertically arranged between the upper groove wall and the lower groove wall of the two stabilizing grooves (27), and through grooves (30) for one ends of the sliding columns (29) to vertically penetrate are respectively arranged at the top ends of the two sliding blocks (28).
6. An elastic sphere testing device according to claim 1, wherein the pushing member includes a pulling plate (32) horizontally slidably connected to the fixed plate (1), and a connecting rod (33) is horizontally disposed on one side of the pulling plate (32), and one end of the connecting rod (33) far away from the pulling plate (32) is fixedly connected to one side of the movable plate (8), and a third cylinder (34) for pushing the pulling plate (32) to move horizontally is disposed on the fixed plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222297581.2U CN218180241U (en) | 2022-08-30 | 2022-08-30 | Elastic ball testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222297581.2U CN218180241U (en) | 2022-08-30 | 2022-08-30 | Elastic ball testing device |
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| Publication Number | Publication Date |
|---|---|
| CN218180241U true CN218180241U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222297581.2U Active CN218180241U (en) | 2022-08-30 | 2022-08-30 | Elastic ball testing device |
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| CN (1) | CN218180241U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116429358A (en) * | 2023-06-12 | 2023-07-14 | 哈尔滨商业大学 | Table tennis elasticity detection equipment |
| CN116593338A (en) * | 2023-05-31 | 2023-08-15 | 江苏云塑海绵制品有限公司 | Multifunctional tester for testing hardness and rebound rate of high-rebound sponge |
-
2022
- 2022-08-30 CN CN202222297581.2U patent/CN218180241U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116593338A (en) * | 2023-05-31 | 2023-08-15 | 江苏云塑海绵制品有限公司 | Multifunctional tester for testing hardness and rebound rate of high-rebound sponge |
| CN116593338B (en) * | 2023-05-31 | 2024-01-09 | 江苏云塑海绵制品有限公司 | Multifunctional tester for testing hardness and rebound rate of high-rebound sponge |
| CN116429358A (en) * | 2023-06-12 | 2023-07-14 | 哈尔滨商业大学 | Table tennis elasticity detection equipment |
| CN116429358B (en) * | 2023-06-12 | 2023-09-01 | 哈尔滨商业大学 | Table tennis elasticity detection equipment |
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