Racket re-leveling testing machine

Abstract

The invention discloses a racket weight leveling testing machine, and relates to the technical field of racket detection. The device comprises a machine body, an electric guide rail is arranged in the middle of one end of the upper portion of the machine body, a graduated scale is arranged on one side of the upper portion of the electric guide rail, a righting frame is arranged on the upper portion of the electric guide rail in a sliding fit mode, a length detection induction sensor is arranged on one side of the righting frame, and a weight detection induction element is arranged in the middle of the upper portion of the machine body. And two positioning seats are arranged on the peripheral side of the weight detection sensing element in a sliding fit manner. The electric guide rail is arranged above the machine body, the distance between the centralizing frame and the length detection induction sensor can be adjusted according to the length of a racket, and the racket placed above the weight detection induction element is positioned through the positioning seat; the racket head is positioned through the racket head fixing seat and the two positioning heads, so that the weight of the racket can be detected more accurately.

Description

Technical Field

[0001] The invention belongs to the field of racket detection, and in particular relates to a racket weight and flatness testing machine. Background Art

[0002] The racket weight and flatness tester is used to test the weight, balance and length of badminton rackets or tennis rackets. If the balance point of the racket is closer to the racket head, it is called "head-heavy"; if the balance point of the racket is closer to the racket handle, it is called "head-light". Generally, the balance point is measured from the bottom of the racket upwards, measured in centimeters and inches. According to the principle of mechanics, the weight is proportional to the feeling of swinging the racket, while the balance point is proportional to the square of the feeling of swinging the racket. The head-heavy racket has a greater inertia of the racket head, and the ball is more powerful but the swing flexibility is slightly worse. It is more suitable for attacking and is also the choice of those players with insufficient strength, because the head-heavy racket reduces your hitting speed, but it can make it easier for you to hit the ball to the backcourt. The length of a standard badminton racket is 664 mm, while the length of an extended badminton racket is generally 674 mm. The most important part of the extension is the racket shaft and the racket handle, and some models of racket frames are also slightly extended. The advantages of lengthened badminton rackets are that they improve the hitting point and increase the flashing of the racket shaft, which can hit a larger landing angle and speed up the ball, which increases the offensiveness and expands the receiving area to a certain extent. However, lengthened badminton rackets are more likely to cause wrist and arm injuries than ordinary badminton rackets, and the flexibility of badminton rackets is also reduced, which is not conducive to handling close balls.

[0003] A Chinese patent with publication number CN102305691B discloses a racket and shaft weight balance test method and system, the system includes a test platform and an upper control host; the test platform is a box structure, the top of the box is a horizontal mounting surface, at least one head contact seat and a tail contact seat are arranged on the horizontal mounting surface, the head contact seat and the tail contact seat are arranged in corresponding positions and the top end surfaces are on the same horizontal plane, and the bottoms of the head contact seat and the tail contact seat are connected to pressure sensors; a control chip is arranged inside the test platform, and the control chip processes the signal transmitted by the pressure sensor and outputs the relevant data to the upper control host.

[0004] Although the above application can perform weight balance detection on the racket, it is difficult to ensure the horizontality of the racket when placed for detection, which affects the subsequent detection results to a certain extent. In addition, if the placement surface is not level enough, the horizontal angle of the machine when placed will deviate, which will affect the subsequent series of test results and greatly reduce the accuracy of the racket weight test.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a racket weight and flatness testing machine to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A racket weight and flatness testing machine, comprising: a machine body, an electric guide rail is provided in the middle of one upper end of the machine body, a scale is provided on one side of the upper end of the electric guide rail, a straightening frame is slidably matched with the upper end of the electric guide rail, a length detection induction sensor is installed on one side of the straightening frame, a weight detection induction element is installed in the middle of the upper end of the machine body, and two positioning seats are slidably matched with the surrounding side of the weight detection induction element; A racket head fixing seat is fixed in the middle of the other end above the body, and two positioning heads are slidably engaged on one side of the racket head fixing seat, and one side of the two positioning heads is rotatably engaged with a screw rod that is threadedly engaged with the racket head fixing seat, and the middle part of the other side of the racket head fixing seat is rotatably engaged with a gear assembly that is transmission-connected to the two screw rods, a touch screen controller is installed in the middle of the front side of the body, and a level ruler is fixed in the middle of the lower part of the four sides of the body, and leveling feet are installed at the four diagonal points on the lower side of the body, and adjustment components that are transmission-connected to the four leveling feet are provided inside the four diagonal points on the lower side of the body.

[0008] Optionally, the weight detection sensing element includes a bracket fixed to the middle part of the upper part of the body, a weight detection sensing sensor installed in the middle part of the bracket, and the two positioning seats are slidably matched with the peripheral side of the bracket.

[0009] By adopting the above technical solution, the racket is gently placed on the bracket, the position of the racket is clamped by two positioning seats, and the weight of the racket is detected by a weight detection induction sensor.

[0010] Optionally, tightening screws are installed on the circumferential sides of the two positioning seats, and the length detection sensor, the weight detection sensor, the electric guide rail and the touch screen controller are electrically connected.

[0011] By adopting the above technical solution, the position of the positioning seat can be quickly adjusted by using the tension screw, which is easy to use, and the start and stop of the electric guide rail can be controlled by the touch screen controller, and the data received by the length detection sensing sensor and the weight detection sensing sensor can be collected and displayed in time.

[0012] Optionally, the relative inner sides of the two positioning heads are both arc-shaped surfaces, a center rod is fixed to the middle of the upper side of the racket head fixing seat, and a rotating head is fixed to one end of the screw rod.

[0013] By adopting the above technical solution, the position of the racket head is positioned through the center rod and two positioning heads, so that it remains in a horizontal and straight state, effectively improving the accuracy of the next step of detection.

[0014] Optionally, the gear assembly includes two small gears respectively fixed to the rear end circumference of the two rotating heads, a telescopic rod rotatably engaged with the middle part of the front side of the racket head fixing seat, and a large gear fixed to the circumference of the telescopic rod, and the large gear is located between the two small gears and meshes with them.

[0015] By adopting the above technical solution, the telescopic rod can be used to pull the large gear and the two small gears to create or cancel the meshing relationship, so that the two positioning heads can be adjusted synchronously, and one of the positioning heads can be adjusted separately, which makes the adjustment more flexible and more accurate.

[0016] Optionally, the telescopic rod includes a rod body rotatably fitted to the middle part of the front side of the racket head fixing seat, and a cylinder body slidably fitted to the peripheral side of the front end of the rod body, and the axial center of the large gear is fixed to the peripheral side of the rear end of the cylinder body.

[0017] By adopting the above technical solution, the large gear can be driven to move its position by utilizing the cylinder body that is slidably matched with the peripheral side of the rod body, thereby achieving meshing with the two small gears.

[0018] Optionally, the adjustment assembly includes a groove opened inside the diagonal lower side of the body, a bevel gear assembly rotatably engaged in the groove, a rotating rod and a screw respectively fixed to one side and the lower side of the bevel gear assembly, and a handle slidably engaged with the circumference of one end of the rotating rod, and the upper middle part of the horizontal support foot is threadedly engaged with the circumference of the lower end of the screw.

[0019] By adopting the above technical solution, the bevel gear assembly can drive the screw rod to cooperate with the horizontal support leg thread, so that the height of the horizontal support leg can be changed as needed, so that the machine body can better maintain a horizontal state.

[0020] Optionally, two fastening blocks are slidably fitted on the inner wall of one side of the groove, springs are fixed between the relative outer sides of the two fastening blocks and the inner wall of the groove, the relative inner sides of the two fastening blocks are arc-shaped structures, and the handle is located between the two fastening blocks.

[0021] By adopting the above technical solution, after the adjustment of the handle, one end is retracted into the groove, and then the two fastening blocks clamp and fix it, thereby further enhancing the stability of the horizontal support foot.

[0022] Optionally, the bevel gear assembly includes a first bevel gear rotatably engaged with the bottom of the inner wall of the groove, and a second bevel gear rotatably engaged with one side of the inner wall of the groove, the first bevel gear is meshed with the second bevel gear, the upper end of the screw rod is fixed to the axial portion of the lower side of the first bevel gear, and the other end of the rotating rod is fixed to the axial portion of the second bevel gear.

[0023] By adopting the above technical solution, the rotation angle can be changed by utilizing the meshing of the first bevel gear and the second bevel gear, thereby better adjusting the height of the horizontal support leg.

[0024] Optionally, a test key, a power indicator light, a power switch, and an emergency stop button are installed on the front side of the body, and the test key, the power indicator light, the power switch, and the emergency stop button are electrically connected to the touch screen controller.

[0025] By adopting the above technical solution, the set test key, power indicator light, power switch, emergency stop button and touch screen controller are electrically connected, so as to better operate and detect the weight and level of the racket.

[0026] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described below at the same time: Through the electric guide rail arranged on the top of the machine body, the distance between the straightening frame and the length detection sensor can be adjusted according to the length of the racket, and the racket placed above the weight detection sensing element can be positioned using the positioning seat. In addition, the position of the racket head is positioned through the racket head fixing seat and two positioning heads, so that the weight of the racket can be detected more accurately.

[0027] By means of the gear assembly arranged on one side of the racket head fixing seat, the positions of the two positioning heads can be adjusted synchronously, so that the positions of the two positioning heads can be kept as consistent as possible during adjustment, and can also be adjusted individually as needed to improve its flexibility, further ensure the positioning of the racket head, and observe the horizontal degree of the machine body after placement through the set level ruler. If the level ruler is tilted, the height of the corresponding horizontal support foot is changed by adjusting the assembly, thereby further improving the accuracy of repeated detection of the racket of the testing machine.

[0028] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 It is a schematic diagram of the body structure; Figure 2 Schematic diagram of the level structure; Figure 3 It is a schematic diagram of the touch screen controller structure; Figure 4 It is a schematic diagram of the structure of the righting frame; Figure 5 It is a schematic diagram of the cross-section structure of the machine body; Figure 6 for Figure 5 Schematic diagram of the structure at A in the middle; Figure 7 A schematic diagram illustrating a touch screen controller; Figure 8 This is a schematic diagram of the test interface; Fig. 9 Schematic diagram for parameter setting; Fig.10 Schematic diagram of data storage.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows: Body 1, electric guide rail 2, scale 3, straightening frame 4, length detection sensor 5, weight detection sensor 6, positioning seat 7, racket head fixing seat 8, center rod 9, positioning head 10, screw 11, rotating head 12, small gear 13, large gear 14, telescopic rod 15, level ruler 16, touch screen controller 17, horizontal support foot 18, test key 19, power indicator light 20, power switch 21, emergency stop button 22, adjustment component 23, groove 231, first bevel gear 232, second bevel gear 233, rotating rod 234, handle 235, fastening block 236, spring 237, screw 238.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings.

[0033] See also Figure 1-10As shown, in this embodiment, a racket weight and flatness testing machine is provided, including a machine body 1, an electric guide rail 2 is provided in the middle of one end of the upper part of the machine body 1, a scale 3 is provided on one side above the electric guide rail 2, a straightening frame 4 is slidably matched above the electric guide rail 2, a length detection induction sensor 5 is installed on one side of the straightening frame 4, and the distance between the straightening frame 4 and the length detection induction sensor 5 can be adjusted according to the length of the racket through the electric guide rail 2 provided above the machine body 1, a weight detection induction element 6 is provided in the middle of the upper part of the machine body 1, and two positioning seats 7 are slidably matched around the peripheral side of the weight detection induction element 6, and the positioning seat 7 is used to position the racket placed above the weight detection induction element 6; A racket head fixing seat 8 is fixed in the middle of the other end above the body 1. Two positioning heads 10 are slidably matched on one side of the racket head fixing seat 8. The position of the racket head is positioned through the racket head fixing seat 8 and the two positioning heads 10, so that the weight and level of the racket can be detected more accurately. One side of the two positioning heads 10 is rotatably matched with a screw rod 11 that is threadedly matched with the racket head fixing seat 8. The middle part of the other side of the racket head fixing seat 8 is rotatably matched with a gear assembly that is transmission-connected with the two screw rods 11. Through the gear assembly set on one side of the racket head fixing seat 8, the positions of the two positioning heads 10 can be synchronously adjusted, so that the positions of the two positioning heads 10 are kept as close as possible during adjustment. The machine body 1 is consistent and can be adjusted separately according to the needs to improve its flexibility and further ensure the positioning of the racket head. A touch screen controller 17 is installed in the middle of the front side of the machine body 1, and a level ruler 16 is fixed in the middle of the lower part of the four sides of the machine body 1. Horizontal feet 18 are installed at the four diagonal places on the lower side of the machine body 1, and the inside of the four diagonal places on the lower side of the machine body 1 is provided with adjustment components 23 which are respectively connected to the four horizontal feet 18. The horizontal degree of the machine body 1 after placement is observed by the set level ruler 16. If the level ruler 16 is tilted, the height of the corresponding horizontal foot 18 is changed by adjusting the component 23, thereby further improving the accuracy of repeated detection of the racket of the testing machine.

[0034] The application of one aspect of this embodiment is as follows: first, the machine body 1 is placed on a certain plane, and the horizontal state of the horizontal rulers 16 around it is observed. If a certain horizontal ruler 16 is in an inclined state, and the height of the corresponding horizontal foot 18 is changed by adjusting the assembly 23, when the machine body 1 is adjusted and is in a horizontal and stable state, the power of the machine body 1 is turned on to put the test machine in an initial state, and then the test sample is selected and numbered according to the test requirements, the touch screen controller 17 on the front side of the machine body 1 enters the power-on interface, the racket sample to be tested is selected, and the test is ready. The distance between the two positioning seats 7 is adjusted according to the width of the club, and then the racket is lightly placed. The racket head is lightly placed above the weight detection sensing element 6 and between the two positioning seats 7, and then the electric guide rail 2 is started according to the length of the racket to drive the straightening frame 4 and the length detection sensing sensor 5 to move. When the length detection sensing sensor 5 detects the tail end of the racket, the electric guide rail 2 stops running, and the racket head is placed above the racket head fixing seat 8, and the two screws 11 are driven synchronously by the gear assembly as needed, so that the two screws 11 synchronously drive the two positioning heads 10 to adjust the position, thereby realizing the positioning of the racket head, and finally the parameters are set and detected through the touch screen controller 17. It should be noted that all electrical equipment involved in this application can be powered by batteries or external power supplies.

[0035] like Figure 1 As shown, the weight detection sensing element 6 of this embodiment includes a bracket fixed to the middle of the upper part of the body 1, a weight detection sensing sensor installed in the middle of the bracket, and two positioning seats 7 slidingly matched on the peripheral side of the bracket. When the racket is placed on the upper part of the bracket, the weight detection sensing sensor detects it and locates the position of the racket through the two positioning seats 7.

[0036] like Figure 1 As shown, the two positioning seats 7 of this embodiment are equipped with tension screws on their circumferential sides, and the length detection sensor 5, the weight detection sensor, the electric guide rail 2 and the touch screen controller 17 are electrically connected. The position of the positioning seat 7 can be adjusted by manually turning the tension screw, making the adjustment of the positioning seat 7 more convenient and quick. After the length detection sensor 5 senses the length of the racket, it sends a signal to the touch screen controller 17, and the touch screen controller 17 controls the electric guide rail 2 to stop running. At the same time, the length detection sensor 5 and the weight detection sensor collect the received signals to the touch screen controller 17 for display.

[0037] like Figure 3-4 As shown, the inner sides of the two positioning heads 10 of this embodiment are both arc-shaped surfaces, a center rod 9 is fixed to the middle of the upper side of the racket head fixing seat 8, and a rotating head 12 is fixed to one end of the screw rod 11. When the racket head is placed on the racket head fixing seat 8, the arc-shaped surfaces of the center rod 9 and the two positioning heads 10 are in contact with the circumference of the racket head, so that it remains in a straight and positioned state.

[0038] like Figure 2-3 As shown, specifically, the specific structure of the gear assembly includes as follows: the gear assembly includes two small gears 13 respectively fixed to the rear end peripheral sides of the two rotating heads 12, a telescopic rod 15 rotatably matched with the middle part of the front side of the racket head fixing seat 8, and a large gear 14 fixed to the peripheral side of the telescopic rod 15. The large gear 14 is located between the two small gears 13 and meshes with them. The telescopic rod 15 includes a rod body rotatably matched with the middle part of the front side of the racket head fixing seat 8, and a cylinder body slidably matched with the peripheral side of the front end of the rod body. The axial center portion of the large gear 14 is fixed to the peripheral side of the rear end of the cylinder body.

[0039] First, pull the cylinder so that the cylinder drives the large gear 14 to move toward the side close to the two small gears 13. When the large gear 14 is in meshing relationship with the two small gears 13, manually rotate the cylinder so that the cylinder drives the large gear 14 to mesh and rotate with the two small gears 13. At the same time, the rod body rotates to match the front middle of the racket head fixing seat 8. Then the two small gears 13 synchronously drive the two screws 11 to rotate, so that the screws 11 drive the positioning head 10 to slide and match the top of the head fixing seat 8, thereby synchronously changing the position of the two positioning heads 10, effectively avoiding the occurrence of different lengths when adjusting the positioning heads 10 separately, and further improving the position accuracy during racket head detection. According to the actual situation, when it is necessary to adjust a certain positioning head 10 separately, it is only necessary to return the large gear 14 to cancel the meshing relationship with the two small gears 13.

[0040] like Figure 5-6 As shown, the adjustment assembly 23 of this embodiment includes a groove 231 opened inside the diagonal lower side of the body 1, a bevel gear assembly rotatably fitted in the groove 231, a rotating rod 234 and a screw rod 238 respectively fixed to one side and the lower side of the bevel gear assembly, and a handle 235 slidably fitted on the circumference of one end of the rotating rod 234. The middle part of the upper side of the horizontal support foot 18 is threadedly fitted with the circumference of the lower end of the screw rod 238. Two fastening blocks 236 are slidably fitted on the inner wall of one side of the groove 231. Springs 237 are fixed between the relative outer sides of the two fastening blocks 236 and the inner wall of the groove 231. The relative inner sides of the two fastening blocks 236 are both arc-shaped structures, and the handle 235 is located between the two fastening blocks 236. When the level ruler 16 is tilted, the handle 235 at the corresponding position is pulled out, so that the two fastening blocks 236 cancel the clamping relationship on the handle 235, and then the handle 235 is rotated, so that the handle 235 drives the rotating rod 234 to rotate, and then the rotating rod 234 drives the second bevel gear 233 to engage with the first bevel gear 232, so that the first bevel gear 232 drives the screw rod 238 to rotate, and the screw rod 238 cooperates with the horizontal support foot 18 thread to adjust its height, thereby realizing the height adjustment of the horizontal support foot 18. After the adjustment is completed, the handle 235 can be pushed between the two fastening blocks 236, and the two fastening blocks 236 are clamped and fixed on the surrounding side of the handle 235 by the elastic rebound force of the two springs 237.

[0041] like Figure 5-6 As shown, specifically, the specific structure of the bevel gear assembly includes the following: the bevel gear assembly includes a first bevel gear 232 that is rotatably matched with the bottom of the inner wall of the groove 231, and a second bevel gear 233 that is rotatably matched with one side of the inner wall of the groove 231. The first bevel gear 232 is meshed with the second bevel gear 233. The upper end of the screw rod 238 is fixed to the axial center of the lower side of the first bevel gear 232, and the other end of the rotating rod 234 is fixed to the axial center of the second bevel gear 233. When the rotating rod 234 rotates, it drives the second bevel gear 233 to mesh with the first bevel gear 232, so that the first bevel gear 232 drives the screw rod 238 to rotate, and the screw rod 238 is threadedly matched with the horizontal support leg 18 to adjust its height, thereby realizing the height adjustment of the horizontal support leg 18.

[0042] like Figure 7-10 As shown, the front side of the body 1 of this embodiment is equipped with a test key 19, a power indicator light 20, a power switch 21, and an emergency stop button 22, and the test key 19, the power indicator light 20, the power switch 21, and the emergency stop button 22 are electrically connected to the touch screen controller 17. Turn on the power switch 21 of the body 1 to put the test machine in the initial state, and select the test sample according to the test requirements for numbering, then the touch screen controller 17 enters the power-on interface, and the racket to be tested is placed, click to enter the test interface, set parameters, and store the detected data.

[0043] The present invention is not limited to the above-mentioned embodiments. Anyone should be aware that any structural changes made under the enlightenment of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention. The technology, shape, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A racket weight and flatness testing machine, characterized in that: include: A machine body (1), wherein an electric guide rail (2) is provided in the middle of one upper end of the machine body (1), a scale (3) is provided on one side above the electric guide rail (2), a straightening frame (4) is slidably engaged with the upper part of the electric guide rail (2), a length detection induction sensor (5) is installed on one side of the straightening frame (4), a weight detection induction element (6) is installed in the middle of the upper part of the machine body (1), and two positioning seats (7) are slidably engaged with the peripheral side of the weight detection induction element (6); A racket head fixing seat (8) is fixed in the middle of the other end above the body (1); two positioning heads (10) are slidably engaged on one side of the racket head fixing seat (8); one side of the two positioning heads (10) are rotatably engaged with a screw rod (11) threadedly engaged with the racket head fixing seat (8); the middle of the other side of the racket head fixing seat (8) is rotatably engaged with a gear assembly that is transmission-connected to the two screw rods (11); a touch screen controller (17) is installed in the middle of the front side of the body (1); a level ruler (16) is fixed in the middle of the lower side of the four sides of the body (1); leveling feet (18) are installed at the four diagonal positions on the lower side of the body (1); and adjustment components (23) are provided inside the four diagonal positions on the lower side of the body (1) and are transmission-connected to the four leveling feet (18) respectively.

2. A racket weight testing machine according to claim 1, characterized in that: The weight detection sensing element (6) comprises a bracket fixed to the middle part of the upper part of the body (1), a weight detection sensing sensor installed in the middle part of the bracket, and the two positioning seats (7) are slidably matched to the peripheral side of the bracket.

3. A racket weight testing machine according to claim 2, characterized in that: The circumferential sides of the two positioning seats (7) are both provided with loosening screws, and the length detection induction sensor (5), the weight detection induction sensor, the electric guide rail (2) and the touch screen controller (17) are electrically connected.

4. A racket weight and flatness testing machine according to claim 1, characterized in that: The inner sides of the two positioning heads (10) are both arc-shaped surfaces. A center rod (9) is fixed to the middle of the upper side of the racket head fixing seat (8). A rotating head (12) is fixed to one end of the screw rod (11).

5. A racket weight and flatness testing machine according to claim 4, characterized in that: The gear assembly comprises two small gears (13) respectively fixed to the rear end peripheral sides of the two rotating heads (12), a telescopic rod (15) rotatably engaged with the middle part of the front side of the racket head fixing seat (8), and a large gear (14) fixed to the peripheral side of the telescopic rod (15), wherein the large gear (14) is located between the two small gears (13) and meshes with them.

6. A racket weight and flatness testing machine according to claim 5, characterized in that: The telescopic rod (15) comprises a rod body rotatably engaged with the middle portion of the front side of the racket head fixing seat (8), and a cylinder body slidably engaged with the peripheral side of the front end of the rod body, and the axial center portion of the large gear (14) is fixed to the peripheral side of the rear end of the cylinder body.

7. A racket weight and flatness testing machine according to claim 1, characterized in that: The adjustment assembly (23) comprises a groove (231) provided inside the diagonal portion of the lower side of the machine body (1), a bevel gear assembly rotatably engaged in the groove (231), a rotating rod (234) and a screw rod (238) respectively fixed to one side and the lower side of the bevel gear assembly, and a handle (235) slidably engaged with the circumference of one end of the rotating rod (234); the middle portion of the upper side of the horizontal support foot (18) is threadedly engaged with the circumference of the lower end of the screw rod (238).

8. A racket weight and flatness testing machine according to claim 7, characterized in that: Two fastening blocks (236) are slidably engaged with the inner wall of one side of the groove (231); springs (237) are fixed between the relative outer sides of the two fastening blocks (236) and the inner wall of the groove (231); the relative inner sides of the two fastening blocks (236) are both arc-shaped structures; and the handle (235) is located between the two fastening blocks (236).

9. A racket weight and flatness testing machine according to claim 8, characterized in that: The bevel gear assembly comprises a first bevel gear (232) rotatably engaged with the bottom of the inner wall of the groove (231), and a second bevel gear (233) rotatably engaged with one side of the inner wall of the groove (231), the first bevel gear (232) meshing with the second bevel gear (233), the upper end of the screw rod (238) being fixed to the axial center portion of the lower side of the first bevel gear (232), and the other end of the rotating rod (234) being fixed to the axial center portion of the second bevel gear (233).

10. A racket weight and flatness testing machine according to claim 1, characterized in that: A test key (19), a power indicator light (20), a power switch (21), and an emergency stop button (22) are installed on the front side of the machine body (1); the test key (19), the power indicator light (20), the power switch (21), and the emergency stop button (22) are electrically connected to the touch screen controller (17).

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