Rebounding type table tennis ball serving device

Abstract

The utility model relates to a springback type ball serving device. The springback type ball serving device comprises a ball passing mechanism, a ball serving mechanism, a springback mechanism opposite to the ball serving mechanism and a circuit control system, the springback mechanism comprises a springback flat plate and a fixing support arranged on the table plane. The springback flat plate is arranged on the fixed bracket; the ball serving mechanism is located on the table top, the ball serving mechanism is provided with a ball serving inlet, the ball passing mechanism is provided with a ball passing outlet, and the ball passing outlet is communicated with the ball serving inlet; the circuit control system is connected with the ball serving mechanism and the ball passing mechanism and used for controlling the ball passing mechanism to transmit balls into the ball serving inlet from the ball passing outlet. And the ball serving mechanism is controlled to launch the balls in the ball serving inlet to the springback flat plate, and the balls are launched in a springback mode through the springback flat plate. The ball serving device provided by the utility model can take racket hitting as a reference, reduces the difficulty of ball catching during training, and is beneficial to enlightenment training of beginners.

Description

[0001] Citation of Related Applications

[0002] The utility model claims the priority of the Chinese patent application entitled “A Table Tennis Rebound Serving Device” and application number 202320832415X, filed with the State Intellectual Property Office of China on April 14, 2023. The entire contents of the application are incorporated into the utility model by reference. Technical Field

[0003] The present application belongs to the technical field of table tennis serving devices, and in particular, relates to a table tennis rebound serving device. Background Art

[0004] At present, most of the serving machines used for table tennis serving training on the market use a motor to drive the friction wheel to directly launch the ball to the table on the side of the batter, resulting in a significant difference between the ball sent and the ball hit with the racket, especially the fast speed of the incoming ball and the high rotation speed, which makes it difficult to catch the ball during training, which is not conducive to beginners mastering the action of hitting back as soon as possible. At the same time, there is no reference to the hitting of the racket, which is not conducive to beginners to establish correct conditioned reflexes in learning and training. Therefore, the existing serving machine can only be used for fitness and entertainment for people with a certain table tennis catching foundation, and it is difficult to be widely used as an enlightenment training device for table tennis beginners. In view of this, it is necessary to provide a table tennis rebound serving device to solve the problem that the existing table tennis serving device does not use the hitting of the racket as a reference, the difficulty of catching the ball during training is large, and it is difficult to adapt to the enlightenment training of table tennis beginners. Utility Model Content

[0005] The utility model provides a rebound serving device for table tennis, which solves the problem that the existing table tennis serving device has no reference to the hitting of the racket, is difficult to catch the ball during training, and is difficult to adapt to the enlightenment training of table tennis beginners.

[0006] The utility model provides a ball rebound serving device, which includes a passing mechanism, a serving mechanism, a rebound mechanism arranged opposite to the serving mechanism, and a circuit control system; the rebound mechanism includes a rebound plate and a fixed bracket arranged on the table plane; the rebound plate is arranged on the fixed bracket; the serving mechanism is located on the table surface, the serving mechanism is provided with a serving entrance, the passing mechanism is provided with a passing exit, and the passing exit is connected with the serving entrance; the circuit control system is respectively connected with the serving mechanism and the passing mechanism, and is used to control the passing mechanism to transmit the ball from the passing exit to the serving entrance; and control the serving mechanism to launch the ball in the serving entrance onto the rebound plate, and send the ball out in a rebounding manner through the rebound plate. The ball serving device provided by the utility model can use the racket hitting as a reference, reduce the difficulty of catching the ball during training, and benefit the enlightenment training of beginners.

[0007] The purpose of this application and the solution of its technical problems are achieved by adopting the following technical solutions.

[0008] The utility model provides a table tennis rebound serving device, which comprises:

[0009] A passing mechanism, a serving mechanism, a rebound mechanism arranged opposite to the serving mechanism, and a circuit control system;

[0010] The rebound mechanism includes a rebound plate and a fixed bracket arranged on the plane of the table; the rebound plate is arranged on the fixed bracket;

[0011] The serving mechanism is located on the table, the serving mechanism is provided with a serving entrance, the passing mechanism is provided with a passing exit, and the passing exit is connected with the serving entrance;

[0012] The circuit control system is connected to the serving mechanism and the passing mechanism respectively, and is used to control the passing mechanism to transfer the table tennis ball from the passing outlet to the serving entrance; and to control the serving mechanism to launch the table tennis ball in the serving entrance onto the rebound plate, and send the table tennis ball out in a rebounding manner through the rebound plate.

[0013] Optionally, the serving mechanism includes a serving outlet, a serving friction wheel disposed at the edge of the serving outlet, and a serving motor connected to the serving friction wheel and the circuit control system respectively;

[0014] The serving friction wheel is a cylindrical rotating wheel, the edge of which can contact the table tennis ball at the serving outlet, and the circuit control system controls the serving motor to drive the serving friction wheel to send the table tennis ball out of the serving outlet.

[0015] Optionally, the ball serving friction wheel is arranged beside the ball serving outlet;

[0016] The ball-serving motor is arranged below the ball-serving friction wheel.

[0017] Optionally, the ball-serving friction wheel and the ball-serving motor are paired and symmetrically arranged on the sides of the ball-serving outlet.

[0018] Optionally, the passing mechanism includes a ball storage box, a passing assembly disposed in the ball storage box, and a driving motor fixed to the ball storage box and connected to the passing assembly and the circuit control system respectively;

[0019] The ball storage box is provided with a ball storage box outlet, and the ball storage box outlet is connected with the ball serving inlet;

[0020] The ball passing assembly is connected to the rotating shaft of the driving motor;

[0021] The circuit control system controls the rotation of the passing assembly, and drives the table tennis ball from the ball storage box to the serving entrance through the passing assembly.

[0022] Optionally, the passing mechanism further includes a conveying hose, which is disposed between the ball serving mechanism and the ball storage box, one end of the conveying hose being connected to the ball storage box outlet, and the other end of the conveying hose being connected to the ball serving inlet.

[0023] Optionally, it also includes a ball serving mechanism base, which is a flat plate structure, and the ball serving mechanism and the fixed bracket are arranged on the upper surface of the ball serving mechanism base.

[0024] Optionally, the circuit control system includes a power transformer and a plurality of power output branches connected to the power transformer;

[0025] The output ends of the plurality of power output branches are respectively connected to the passing mechanism and the serving mechanism.

[0026] Optionally, a DC motor speed regulating switch is provided between the output end of each power output branch and the power transformer to control the rotation speed of the motor connected to the output end of each power output branch.

[0027] Compared with the prior art, the utility model has obvious advantages and beneficial effects. By means of the above technical solution, the utility model has at least one of the following advantages and effects:

[0028] 1. The utility model provides a ball rebound serving device, which includes a passing mechanism, a serving mechanism, a rebound mechanism arranged opposite to the serving mechanism, and a circuit control system; the rebound mechanism includes a rebound plate and a fixed bracket arranged on the table plane; the rebound plate is arranged on the fixed bracket; the serving mechanism is located on the table surface, the serving mechanism is provided with a serving entrance, the passing mechanism is provided with a passing exit, and the passing exit is connected with the serving entrance; the circuit control system is respectively connected with the serving mechanism and the passing mechanism, and is used to control the passing mechanism to transmit the ball from the passing exit to the serving entrance; and control the serving mechanism to launch the ball in the serving entrance onto the rebound plate, and send the ball out in a rebounding manner through the rebound plate. The ball serving device provided by the utility model can use the racket hitting as a reference, reduce the difficulty of catching the ball during training, and benefit the enlightenment training of beginners.

[0029] 2. The serving mechanism provided by the utility model includes a serving outlet, a serving friction wheel arranged at the edge of the serving outlet, and a serving motor connected to the serving friction wheel and the circuit control system respectively; the serving friction wheel is a cylindrical rotating wheel, the edge of which can contact the ping-pong ball at the serving outlet, and the circuit control system controls the serving motor to drive the serving friction wheel to send the ping-pong ball out of the serving outlet. The present application realizes external serving through the serving friction wheel at the edge of the serving outlet, and controls the rotation speed of the serving friction wheel through the circuit control system, thereby controlling the ping-pong ball to be sent out from the serving outlet.

[0030] 3. The passing mechanism provided by the utility model includes a ball storage box, a passing assembly arranged in the ball storage box, and a driving motor fixed to the ball storage box and connected to the passing assembly and the circuit control system respectively; the ball storage box is provided with a ball storage box outlet, and the ball storage box outlet is connected to the serving entrance; the passing assembly is connected to the rotating shaft of the driving motor; the circuit control system controls the passing assembly to rotate, and drives the table tennis ball from the ball storage box to the serving entrance through the passing assembly. The utility model can be provided with a spiral groove on the passing assembly, the width of the groove corresponds to the diameter of the table tennis ball; and the spiral outlet of the spiral groove corresponds to the passing outlet, when the passing assembly is driven to rotate by the driving screw motor, the table tennis ball in the ball storage box is squeezed along the spiral outlet edge of the groove and / or the body of the ball storage box, and the table tennis ball in the ball storage box are squeezed together, so that the table tennis ball in the ball storage box is transmitted to the serving entrance along the spiral outlet of the groove.

[0031] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above-mentioned structure and other purposes, features and advantages of the utility model more obvious and easy to understand, the following is a preferred embodiment, and is described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front view schematic diagram of a ball rebound serving device according to an embodiment of the present application;

[0033] Figure 2 It is a right side schematic diagram of a ball rebound serving device according to one embodiment of the present application;

[0034] Figure 3 This is a structural schematic diagram of a ball storage box according to an embodiment of the present application;

[0035] Figure 4 It is a structural schematic diagram of a ball driving screw rod according to an embodiment of the present application;

[0036] Figure 5It is a schematic diagram of the structure of the transformer power supply output in the circuit control system of a ball rebound serving device according to one embodiment of the present application;

[0037] Figure 6 It is a schematic diagram of the circuit control system structure of a ball rebound serving device according to one embodiment of the present application;

[0038] Figure 7 is a side view schematic diagram of a ball rebound serving device according to another embodiment of the present application;

[0039] Figure 8 is a side view schematic diagram of a ball storage box structure according to another embodiment of the present application;

[0040] Fig. 9 is a top view schematic diagram of a ball storage box structure according to another embodiment of the present application;

[0041] Fig.10 It is a side view schematic diagram of a ball storage box structure according to another embodiment of the present application.

[0042] Reference Numbers

[0043] 1-Rebound mechanism 11-Rebound plate

[0044] 12-Fixed bracket 2-Serving mechanism

[0045] 20-Serving entrance 21-Serving friction wheel

[0046] 22-Serving motor 23-Serving outlet

[0047] 3- Ball passing mechanism 30- Box-shaped ball storage table

[0048] 30a- cylindrical ball storage table 31- box-shaped ball storage box

[0049] 31a-barrel-shaped ball storage box 300-table tennis ball storage area

[0050] 310- side wall of ball storage box 311- table tennis ball gathering area

[0051] 312- inclined bottom surface 32- ball drive screw

[0052] 321-Spiral baffle 33-Drive screw motor

[0053] 33a-drive ball-pick motor 34-delivery hose

[0054] 35-Double-layer ball-moving plate 351-Upper-layer ball-moving plate

[0055] 352-lower ball plate 353-accommodation space

[0056] 354-Gap 36-Ball storage box outlet

[0057] 37-Ball blocking plate 371-Baffle gap

[0058] 4-Circuit Control System 400-Rechargeable and Dischargeable Power Supply

[0059] 41-power transformer 42-power output branch

[0060] 43-DC motor speed control switch 5-serving mechanism base DETAILED DESCRIPTION

[0061] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the specific implementation method, structure, characteristics and effects proposed by the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0062] Example 1

[0063] The utility model provides a ball rebound serving device, which includes a passing mechanism, a serving mechanism, a rebound mechanism arranged opposite to the serving mechanism, and a circuit control system; the rebound mechanism includes a rebound plate and a fixed bracket arranged on the table plane; the rebound plate is arranged on the fixed bracket; the serving mechanism is located on the table surface, the serving mechanism is provided with a serving entrance 20, the passing mechanism is provided with a passing exit, and the passing exit is connected with the serving entrance 20; the circuit control system is respectively connected with the serving mechanism and the passing mechanism, and is used to control the passing mechanism to transmit the ball from the passing exit to the serving entrance 20; and control the serving mechanism to launch the ball in the serving entrance 20 onto the rebound plate, and send the ball out in a rebounding manner through the rebound plate. The ball serving device provided by the utility model can use the racket hitting as a reference, reduce the difficulty of receiving the ball during training, and benefit the enlightenment training of beginners.

[0064] The utility model relates to a table tennis rebound serving device, specifically, the table tennis rebound serving device utilizes the rebound force of a rebound plate (or racket) to rebound the table tennis ball launched by the serving device to the table on the side of the batter (or trainer). At present, most of the serving machines used for training on the market adopt a method of using a motor to drive a friction wheel to directly launch the ball to the table on the side of the batter, resulting in obvious differences between the ball launched and the ball hit by the racket, especially the table tennis ball has a fast speed and strong rotation, which is difficult for beginners to quickly master the return action. Beginners cannot hit the ball based on the model reference of hitting the ball with the rebound plate (or racket), which is not conducive to beginners to establish correct conditioned reflexes in learning and training. Therefore, the existing serving machine can only be used for fitness and entertainment for people with a certain table tennis hitting foundation, and is difficult to be used as an enlightenment training assistant for beginners.

[0065] The rebound plate 11 in the rebound serving device provided by the utility model can be a table tennis racket, or a specially customized flat plate structure with different outer contours. The flat plate structure of the rebound plate 11 is not limited to a smooth ball plate, or a racket surface with rubber surfaces of different elastic strengths pasted thereon. For example, during training, rubber surfaces of different elastic materials, such as a strong elastic rubber surface with small deformation, can be set according to the batting action and batting strength of beginners, for training the pushing and blocking batting action of beginners. In addition, the strong elastic rubber surface with large deformation can be replaced on the surface of the rebound plate 11 for experienced batters, and the angle between the rebound plate 11 and the serving mechanism 2, as well as the position where the rebound plate 11 sends out the table tennis ball in a rebounding manner, can be adjusted, so that experienced trainees can perform batting training for arc balls of different strengths formed at specific positions on the table tennis table. The rebound serving device provided by the utility model can utilize a rebounding plate (or racket) to rebound a table tennis ball as a serve, and can make serves similar to those in real competition or serves of various types of table tennis balls by a coach. The speed and rotation difficulty of the serve can be reduced to a basic training level according to the training level of beginners, and can effectively help trainees establish conditioned reflexes of table tennis hitting techniques that conform to reality. At the same time, the utility model can also replace the coach in performing simple multi-ball serve training, and assist the coach in improving the efficiency and quality of training.

[0066] The utility model provides a table tennis rebound serving device, such as Figures 1 to 6 As shown, the table tennis rebound serving device includes: a passing mechanism 3, a serving mechanism 2 located on the table surface, a rebound mechanism 1 arranged opposite to the serving mechanism 2, and a circuit control system 4. The rebound mechanism 1 includes a rebound plate 11 and a fixed bracket 12 arranged on the table plane; the rebound plate 11 is arranged on the fixed bracket 12. The fixed bracket 12 can be arranged perpendicular to the table plane, or it can be arranged at a certain angle to the table plane toward the serving mechanism 2. The arrangement of the above-mentioned fixed bracket 12 can ensure that the rebound plate 11 arranged on the fixed bracket 12 can be adjusted up and down in the direction toward the serving mechanism 2. The connecting end of the rebound plate 11 and the fixed bracket 12 is a cylindrical adjustment handle, and the adjustment handle is arranged on an adjustable tightness and fixed ring arranged on the upper section of the fixed bracket 12. When the collar is opened, the adjustment handle is placed in the collar, and the rebound plate 11 can rotate around the adjustment handle; the angle between the surface of the rebound plate 11 and the table plane is adjusted so that the trajectory of the ball launched from the serving mechanism 2 to the rebound plate 11 and the surface of the rebound plate 11 are within a suitable angle range. For example, the above angle range can be preset within a range of 30° to 60° according to actual conditions.

[0067] In one embodiment of the utility model, as a preferred implementation mode, the upper section and the lower section of the above-mentioned fixed bracket 12 can rotate relative to each other. By rotating the upper section of the fixed bracket 12, the board surface of the rebound plate 11 is adjusted to a certain angle with the serving direction of the serving mechanism 2 toward the direction of the side fixed bracket 12, so that the serving mechanism 2 serves from the right side of one end of the table to the right side area of ​​the table on the other side (i.e., right diagonal serving); or the serving mechanism 2 serves from the right side of one end of the table to the right side area of ​​the table on the other side (i.e., left diagonal serving); or when the serving mechanism 2 launches a loop ball, the rotating structure between the upper section and the lower section of the fixed bracket 12 is rotated to adjust the angle between the rebound plate 11 and the width direction of the table to a suitable angle, so that the ball launched by the serving mechanism 2 to the rebound plate 11 The ball popped out falls in the plane area of ​​the other end of the table corresponding to the rebound plate 11 (to avoid the ball popped out of the rebound plate 11 not falling in the corresponding plane area of ​​the other end of the table).

[0068] In one embodiment of the utility model, the rebound serving device further comprises a serving mechanism base 5, the serving mechanism base 5 is a flat plate structure, the serving mechanism 2 and the fixed bracket 12 are arranged on the upper surface of the serving mechanism base 5. As a preferred embodiment, the serving mechanism 2 is tilted toward the other side of the table, and the fixed bracket 12 can also be tilted toward the side away from the serving mechanism 2 to expand the space range between the serving mechanism 2 and the rebound plate 11, so that the angle of the ball launched by the serving mechanism 2 to the rebound plate 11 can be more conveniently adjusted in the vertical direction. In addition, as an optional embodiment, the serving mechanism 2 and the serving mechanism base 5 can be arranged as a movable connection structure that can be fixed after adjusting the tilt angle of the serving mechanism 2 and the table plane, wherein the serving mechanism 2 can adjust the tilt angle in the direction of the rebound plate 11. As an optional embodiment, the rebound plate 11 can be replaced by a table tennis racket.

[0069] In one embodiment of the utility model, the serving mechanism 2 is provided with a serving entrance 20, and the passing mechanism 3 is provided with a passing outlet, which is communicated with the serving entrance 20, so that the passing mechanism 3 transfers the table tennis ball to the serving entrance 20 through the passing outlet.

[0070] In one embodiment of the utility model, the serving mechanism 2 includes a serving outlet 23, a serving friction wheel 21 disposed at the edge of the serving outlet 23, and a serving motor 22 connected to the serving friction wheel 21 and the circuit control system 4, respectively. The serving outlet 23 is disposed in the direction of the serving mechanism 2 toward the rebound mechanism 1, and an arc-shaped channel is disposed in the side of the serving mechanism 2 away from the rebound mechanism 1, so that after the table tennis ball passes through the passing outlet, it rises along the arc-shaped channel in the serving mechanism 2 and changes the transmission direction of the table tennis ball in the serving mechanism 2, so that the table tennis ball in the serving mechanism 2 is better transmitted to the serving outlet 23, so that the serving mechanism 2 is easy to prepare for serving the table tennis ball at the serving outlet 23 and perform subsequent serving actions.

[0071] In one embodiment of the utility model, the serving friction wheel 21 is arranged beside the serving outlet 23; and the serving motor 22 is arranged below the serving friction wheel 21. The utility model arranges the serving friction wheel 21 beside the serving outlet 23 near the serving outlet 23, so that the serving friction wheel 21 can launch the table tennis ball located at the serving outlet 23 with a small-sized structure and a small-sized driving force. At the same time, by arranging the serving motor 22 below the serving friction wheel 21 and away from the serving outlet 23, the vibration of the serving motor 22 during driving operation can be avoided from affecting the clamping and launching of the table tennis ball at the serving outlet 23, thereby improving the accuracy of the serving mechanism 2 in clamping the table tennis ball at the serving outlet 23 through the inner wall of the serving outlet 23 and the serving friction wheel 21, and the stability of the serving mechanism 2 in launching the table tennis ball.

[0072] In one embodiment of the utility model, the serving friction wheel 21 and the serving motor 22 are paired and symmetrically arranged beside the serving outlet 23. The utility model further improves the accuracy of the serving mechanism 2 clamping the table tennis ball at the serving outlet 23 and the stability of the serving mechanism 2 launching the table tennis ball through the above-mentioned structural arrangement.

[0073] In one embodiment of the utility model, the serving friction wheel 21 is a cylindrical rotating wheel, and the edge of the serving friction wheel 21 can contact the table tennis ball at the serving outlet 23. The circuit control system 4 controls the serving motor 22 to drive the serving friction wheel 21 to send the table tennis ball out of the serving outlet 23. As a preferred embodiment, a soft clamping layer can be provided on the circular edge of the serving friction wheel 21 that contacts the table tennis ball at the serving outlet 23 to prevent the table tennis ball from being damaged when the serving friction wheel 21 is in operation. The soft clamping layer is not limited to a rubber layer, a soft PVC layer, etc.

[0074] In one embodiment of the utility model, the passing mechanism 3 includes a ball storage box, a passing assembly arranged in the ball storage box, and a driving motor fixed to the ball storage box and connected to the passing assembly and the circuit control system 4 respectively; the ball storage box is provided with a ball storage box outlet, and the ball storage box outlet is connected to the serving entrance 20; the passing assembly is connected to the rotating shaft of the driving motor; the circuit control system 4 controls the rotation of the passing assembly, and drives the table tennis ball from the ball storage box to the serving entrance 20 through the passing assembly.

[0075] In one embodiment of the utility model, specifically, the ball passing mechanism 3 includes a box-shaped ball storage box 31, a ball passing driving screw 32 disposed in the box-shaped ball storage box 31, and a driving screw motor 33 fixed to the box-shaped ball storage box 31 and connected to the ball passing driving screw 32 and the circuit control system 4 respectively; the box-shaped ball storage box 31 is provided with a ball storage box outlet 36, and the ball storage box outlet 36 is connected to the serving entrance 20; one end of the ball passing driving screw 32 is connected to the rotating shaft of the driving screw motor 33, and the other end is connected to the lower end of the ball passing outlet; the circuit control system 4 controls the ball passing driving screw 32 to drive the table tennis ball from the box-shaped ball storage box 31 to the serving entrance 20. A box-shaped ball storage table 30 is provided between the box-shaped ball storage box 31 and the table.

[0076] The utility model provides a spiral groove on the ball-passing driving screw, wherein the width of the groove corresponds to the diameter of the table tennis ball; and the spiral outlet of the spiral groove corresponds to the ball-passing outlet. When the ball-passing driving screw is driven to rotate by the driving screw motor, the table tennis balls in the box-shaped ball storage box 31 are squeezed along the spiral outlet edge of the groove and / or the box body of the box-shaped ball storage box 31 and the table tennis balls in the box-shaped ball storage box 31 are squeezed together, so that the table tennis balls in the box-shaped ball storage box 31 are transmitted to the ball-passing outlet along the spiral outlet of the groove.

[0077] In one embodiment of the utility model, the passing mechanism 3 further comprises a conveying hose 34, the conveying hose 34 is arranged between the serving mechanism 2 and the box-shaped ball storage box 31, one end of the conveying hose 34 is connected with the outlet of the box-shaped ball storage box, and the other end is connected with the serving inlet. By arranging the conveying hose between the serving mechanism 2 and the box-shaped ball storage box 31, the box-shaped ball storage box 31 can be arranged around the serving mechanism (2) on the table. As an optional embodiment, a funnel-shaped ball collecting net can be arranged on one side of the table of the serving mechanism 2, the funnel holes of the funnel-shaped ball collecting net are connected with the ball collecting inlet arranged on the top surface of the box-shaped ball storage box 31, the funnel-shaped ball collecting net collects the table tennis balls that have not fallen into the table surface on one side of the serving mechanism 2 through the funnel-shaped ball collecting net and collects them into the box-shaped ball storage box 31, thereby saving the operation of picking up balls or adding balls to the box-shaped ball storage box 31 when using a rebound serving device.

[0078] In the above embodiments of the present invention, as an optional implementation, Figure 3 As shown, the box-shaped ball storage box 31 includes a ball storage box side wall 310 and an inclined bottom surface 312. The bottom of the box-shaped ball storage box 31 is an inclined bottom surface 312, and a table tennis ball gathering area 311 is provided at the lower part of the inclined bottom surface 312. The table tennis ball gathering area 311 can be rectangular (see Figure 3 ), not limited to circular, elliptical and other structural forms, and no specific structural shape is limited here. In an embodiment of the utility model, the rotating shaft of the ball driving screw 32 is rotatably connected to the side of the ball outlet of the box-shaped ball storage box 31, and a spiral baffle 321 is provided outwardly around the rotating shaft of the ball driving screw 32. A plurality of table tennis ball accommodating areas 300 are provided between the spiral baffle 321 and the rotating shaft of the ball driving screw 32. Each table tennis ball accommodating area 300 can accommodate a table tennis ball, and the ball driving screw 32 and the spiral baffle 321 are arranged in a rectangular table tennis ball push box. The above-mentioned rectangular push box can extend axially along the rotating shaft of the ball driving screw 32 to the outside of the box-shaped ball storage box 31 (see Figure 4 ), which is convenient for checking and repairing the ball driving screw 32 or the spiral baffle 321. When the ball serving device is working, the rectangular push box is located at the bottom of the table tennis ball gathering area 311 in the box-shaped ball storage box 31, and is used to place the table tennis balls above in the table tennis ball accommodating area between the ball driving screw 32 and the spiral baffle 321. When the driving screw motor 33 rotates, the ball driving screw 32 drives the spiral baffle 321 to push the table tennis balls to be continuously input into the conveying hose 34.

[0079] In one embodiment of the present invention, the delivery hose 34 is disposed on a side opposite to the ball outlet (eg Figure 2 ), so that the table tennis balls in the box-shaped ball storage box 31 can be transferred to the serving inlet 20 of the serving mechanism 2 through the passing mechanism 3 along the conveying hose, making it more convenient to connect and penetrate the serving inlet 20 of the serving mechanism 2.

[0080] In one embodiment of the utility model, the circuit control system 4 is connected to the serving mechanism 2 and the passing mechanism 3 respectively, and is used to control the passing mechanism 3 to transfer the table tennis ball from the passing outlet to the serving entrance 20; and to control the serving mechanism 2 to launch the table tennis ball in the serving entrance 20 onto the rebound plate 11, and send the table tennis ball out in a rebound manner through the rebound plate 11.

[0081] The circuit control system 4 includes a power transformer 41 and a plurality of power output branches 42 connected to the power transformer 41; the output ends of the plurality of power output branches 42 are respectively connected to the passing mechanism 3 and the serving mechanism 2. The circuit control system 4 can be installed on the serving mechanism base 5, or can be installed separately in a box. Figure 5 and Figure 6As shown, the circuit control system 4 converts the external 220V AC power supply into a 36V DC power supply through a power transformer 41, and the circuit control system 4 sets up three separate 36V DC power supply branches, and the above three 36V DC power supply branches are electrically connected to two ball-serving motors 22 and one driving screw motor 33 respectively.

[0082] In one embodiment of the utility model, in order to control the motors on the three separate 36V DC power supply branches, a DC motor speed control switch 43 is provided between the output end of each power output branch 42 and the power transformer 41 to control the speed of the motor connected to the output end of each power output branch 42. The DC motor speed control switch 43 can be a pulse width modulation DC motor speed control switch (pwn DC motor speed control switch).

[0083] In one embodiment of the utility model, when the rebound serving device is in operation, when the circuit control system 4 is turned on, the 220V AC power is converted into three 36V DC power supplies through the power transformer 41, one of which controls the driving screw motor 33 through the speed switch knob 43, thereby driving the ball driving screw 32 in the box-shaped ball storage box 31 to rotate, and pushes the table tennis balls in the box-shaped ball storage box 31 to the position of the serving outlet 23 through the conveying hose 34. At this moment, the currents of the other two branch circuits control the serving motors 22 located on both sides of the serving outlet 23 through the DC motor speed regulating switch 43, thereby respectively driving the serving friction wheels 21 on both sides of the serving outlet 23 to rotate, and the table tennis balls delivered to the serving outlet 23 are ejected onto the rebound plate 11 of the rebound mechanism 1, and the rebound plate 11 rebounds the table tennis balls that hit the rebound plate 11 to the table surface on the side of the batter (or trainer) for the batter (or trainer) to practice batting.

[0084] In one embodiment of the utility model, the control of the rotation speed change of the serving motor 22 and the driving screw motor 33 is realized by three pulse width modulation DC motor speed regulating switches in the circuit control system 4, and the power transformer 41. Among them, the speed change adjustment of the serving rhythm is realized by controlling the speed change of the driving screw motor 33 in the circuit control system 4 through the pulse width modulation DC motor speed regulating switch, so as to adjust the interval between two serving times. When the speed of the driving screw motor 33 becomes faster, the interval between two serving times becomes shorter, and the serving rhythm becomes faster; when the speed of the driving screw motor 33 becomes slower, the interval between two serving times becomes longer, and the serving rhythm becomes slower. Among them, the adjustment of the serving rebound force of the rebound plate 11 (or racket) is carried out by adjusting the pulse width modulation DC motor speed regulating switch in the power branch of the serving motor 22 connected to the circuit control system 4 to adjust the serving rebound force. Specifically, the pulse width modulation DC motor speed regulating switch is adjusted so that the power branch of the serving motor 22 controls and adjusts the speed of the serving friction wheel 21 driven by the serving motor 22. When the speed of the serving friction wheel 21 increases, the rebound force of the rebound plate 11 (or racket) increases; when the speed of the serving friction wheel 21 decreases, the rebound force of the rebound plate 11 (or racket) decreases. The adjustment of the change of the length of the serving arc is achieved by moving the serving mechanism base 5 in the front and rear positions of the table, and by adjusting the pulse width modulation DC motor speed control switch knob in the circuit control system 4 to coordinate and control the change of the speed of the serving friction wheel 21 driven by the serving motor 22, and the change of the length of the serving arc is achieved by the speed of the serving friction wheel 21. For example, the base 5 of the serving mechanism can be moved to the rear position on the table, and the pulse width modulation DC motor speed control switch knob of a serving motor 22 next to the serving outlet 23 can be adjusted to a larger or smaller value than the pulse width modulation DC motor speed control switch knob of another serving outlet 23. The pulse width modulation DC motor speed control switch knob of a serving motor 22 next to the serving outlet 23 can be adjusted differently to adjust the length of the serving arc.

[0085] Example 2

[0086] like Figures 7 to 10As shown, in the above embodiment of the utility model, a barrel-shaped ball storage box 31a with a barrel-shaped structure is used to replace the box-shaped ball storage box 31 with a box-shaped structure in the embodiment, and a barrel-shaped ball storage table 30a is used to replace the box-shaped ball storage table 30, wherein the top of the barrel-shaped ball storage table 30a is adapted to the bottom of the barrel-shaped ball storage box 31a. A chargeable and dischargeable power supply 400 is added to the circuit control system 4, and the chargeable and dischargeable power supply 400 is arranged inside the barrel-shaped ball storage table 30a. The table tennis rebound serving device of the utility model can charge the chargeable and dischargeable power supply 400 through an external AC transmission line; it can also be powered directly through an external AC transmission line by adjusting a switch. The ball-moving disc motor 33a is arranged at the bottom center of the barrel-shaped ball storage table 30a, and the double-layer ball-moving disc 35 is arranged at the bottom area of ​​the barrel-shaped ball storage box 31a, and the size of the double-layer ball-moving disc 35 when rotating is adapted to the bottom size of the barrel-shaped ball storage box 31a. The double-layer ball-pickling plate 35 is fixedly connected to the output shaft of the driving ball-pickling plate motor 33a through the connecting rotating shaft in the axial direction of the barrel-shaped ball storage box 31a, so that the driving ball-pickling plate motor 33a drives the double-layer ball-pickling plate 35 to rotate in the bottom area of ​​the barrel-shaped ball storage box 31a. The double-layer ball-pickling plate 35 includes an upper-layer ball-pickling plate 351 and a lower-layer ball-pickling plate 352. The upper-layer ball-pickling plate 351 has a notch 354 or a hole larger than the maximum cross-section of the table tennis ball, and a horizontal baffle to block the table tennis ball. When the upper-layer ball-pickling plate 351 rotates, the table tennis ball at the bottom of the barrel-shaped ball storage table 30a can fall into the gap between the upper-layer ball-pickling plate and the bottom plate of the barrel-shaped ball storage box 31a through the notch 354 or the hole, and the height between the upper-layer ball-pickling plate and the bottom plate of the barrel-shaped ball storage box 31a is slightly larger than the diameter of the table tennis ball, and the two are fixedly connected by the connecting rotating shaft. The lower ball-moving plate 352 is composed of at least one ball-moving fan blade. As an optional embodiment, the ball-moving fan blade is composed of four symmetrical and horizontally distributed blades (see FIG. Fig.10 There is a space 353 for accommodating a table tennis ball between every two adjacent ball-moving fan blades, and the ball-moving fan blades are located in the middle of the accommodating space 353 in the height direction. A ball-blocking baffle 37 is provided at the downstream position of the ball storage box outlet 36 in the rotation direction of the ball-moving fan blades. The ball-blocking baffle 37 is provided with a baffle notch 371 (see FIG. 1 ) for accommodating the ball-moving fan blades of the lower ball-moving plate 352 to pass through. Fig.10 ).

[0087] In the embodiment of the utility model, when the ball rebound serving device is in operation, the upper ball-pushing disc 351 rotates, so that the upper table tennis ball falls into the accommodating space 353 through the notch 354; and in the rotation process of the lower ball-pushing disc 352, under the action of the barrel-shaped ball storage box 31a and the ball-blocking baffle 37, the table tennis ball in the accommodating space 353 is pushed out from the ball storage box outlet 36 into the delivery hose 34. Under the interaction, the table tennis ball in the delivery hose 34 moves along the delivery hose 34 toward the serving entrance 20 until it contacts the serving friction wheel 21, and flies out from the serving exit 23 through the rotation of the serving friction wheel 21, hits the rebound plate 11, and falls into the ball-dropping area opposite the table tennis table. The serving rhythm, serving strength of the serving friction wheel 21, and the rebound direction of the rebound plate 11 are the same as those in the adjustment process of the first embodiment, and will not be repeated here.

[0088] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A table tennis rebound serving device, characterized in that: include: A passing mechanism (3), a serving mechanism (2), a rebound mechanism (1) arranged opposite to the serving mechanism (2), and a circuit control system (4); The rebound mechanism (1) comprises a rebound plate (11) and a fixed bracket (12) arranged on the plane of the table; the rebound plate (11) is arranged on the fixed bracket (12); The serving mechanism (2) is located on the table, the serving mechanism (2) is provided with a serving entrance (20), the passing mechanism (3) is provided with a passing exit, the passing exit is in communication with the serving entrance (20); The circuit control system (4) is respectively connected to the serving mechanism (2) and the passing mechanism (3), and is used to control the passing mechanism (3) to transfer the table tennis ball from the passing outlet to the serving entrance (20); and to control the serving mechanism (2) to launch the table tennis ball in the serving entrance (20) onto the rebound plate (11), and to send the table tennis ball out in a rebounding manner via the rebound plate (11).

2. The rebound serving device according to claim 1, characterized in that: The ball serving mechanism (2) comprises a ball serving outlet (23), a ball serving friction wheel (21) arranged at the edge of the ball serving outlet (23), and a ball serving motor (22) connected to the ball serving friction wheel (21) and the circuit control system (4) respectively; The serving friction wheel (21) is a cylindrical rotating wheel, the edge of which can contact the table tennis ball at the serving outlet (23), and the circuit control system (4) controls the serving motor (22) to drive the serving friction wheel (21) to send the table tennis ball out of the serving outlet (23).

3. The rebound serving device according to claim 2, characterized in that: The ball-serving friction wheel (21) is arranged beside the ball-serving outlet (23); The ball-serving motor (22) is arranged below the ball-serving friction wheel (21).

4. The rebound serving device according to claim 3, characterized in that: The ball-serving friction wheel (21) and the ball-serving motor (22) are arranged in pairs and symmetrically on the sides of the ball-serving outlet (23).

5. The rebound serving device according to claim 1, characterized in that: The ball passing mechanism (3) comprises a ball storage box, a ball passing assembly arranged in the ball storage box, and a driving motor fixed to the ball storage box and connected to the ball passing assembly and the circuit control system (4) respectively; The ball storage box is provided with a ball storage box outlet, and the ball storage box outlet is connected to the ball serving inlet (20); The ball passing assembly is connected to the rotating shaft of the driving motor; The circuit control system (4) controls the rotation of the passing component, and drives the table tennis ball from the ball storage box to the serving entrance (20) through the passing component.

6. The rebound serving device according to claim 5, characterized in that: The ball passing mechanism (3) further comprises a delivery hose (34), which is arranged between the ball serving mechanism (2) and the ball storage box, one end of the delivery hose (34) being connected to the ball storage box outlet, and the other end of the delivery hose (34) being connected to the ball serving inlet (20).

7. The rebound serving device according to claim 6, characterized in that: It also comprises a ball-serving mechanism base (5), the ball-serving mechanism base (5) being a flat plate structure, the ball-serving mechanism (2) and the fixed bracket (12) being arranged on the upper surface of the ball-serving mechanism base (5).

8. The rebound serving device according to claim 1, characterized in that: The circuit control system (4) comprises a power transformer (41) and a plurality of power output branches (42) connected to the power transformer (41); The output ends of the plurality of power output branches (42) are respectively connected to the ball passing mechanism (3) and the ball serving mechanism (2).

9. The rebound serving device according to claim 8, characterized in that: A DC motor speed regulating switch (43) is provided between the output end of each power output branch (42) and the power transformer (41) to control the rotation speed of the motor connected to the output end of each power output branch (42).

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