A height-adjustable net rack device for table tennis training

Abstract

The utility model discloses a table panel's middle part both sides symmetry is provided with the net post, and the net post between is connected the net through the suspension net rope, and the net post top coaxially coupled has the installation rod, and the installation rod top is fixed with the longitudinal setting's adjusting board, and the adjusting board side part is provided with E type adjusting groove, and E type adjusting groove is by the low -lying groove of mutual parallel, the mid groove, the high -lying groove and the longitudinal groove of communicating three grooves same end constitutes, and the net is suspended in the limited height board just above, and the limited height board both ends are fixed with the same direction extension's clamping strip, and the clamping strip is through the adjusting groove, and the adjusting board outside longitudinal is provided with the limit groove, and the limit groove is rolled with the gyro wheel cooperation, and the gyro wheel is through the pivot connection two sides's compression spring, and the compression spring other end is fixed in the clamping strip. The utility model has the advantage that the gear switching is carried out fast to adapt to different training needs.

Description

Technical Field

[0001] This utility model relates to the field of table tennis technology, specifically to an adjustable height net frame device for table tennis training. Background Technology

[0002] In table tennis training, players need to improve their technical accuracy by controlling the height of their shot trajectory. For example, a low arc is required for a topspin shot over the net, and the highest toss point needs to be limited during serve training. Currently, the mainstream training method uses a fixed height limiting device, such as a single stick that spans above the net. Its height is not adjustable and cannot adapt to different technical movements (such as switching the height limit between a low-arc topspin shot and a high-toss serve). This results in a monotonous training mode. Some improved solutions allow manual disassembly and reinstallation of the height limiting stick, but each adjustment requires loosening bolts, repositioning, and fixing, which takes more than 30 seconds, disrupting the continuity of training and making temporary adjustments inefficient.

[0003] Chinese Patent No. CN201384839Y discloses a height-restricted net for table tennis. This net can be combined with a standard net. The base of the height-restricted net is fitted onto the net posts of the standard net and fixed in place. The connection between the base and the sliding posts is achieved through welding or a wire joint structure. The sliding posts are marked with dimensions and equipped with movable sleeves that can move up and down. The sleeves are fitted with positioning screws, allowing for fixation at any point on the sleeves. A fixing frame is welded to the sleeves to secure the height-restricted net. According to the coach's training plan and requirements, the spatial distance between the top of the standard net and the bottom of the height-restricted net can be adjusted so that legal shots from both sides fly through the middle, thus lowering the ball's trajectory.

[0004] However, this patent relies on the tightening and loosening of a sliding sleeve and a positioning screw for fixation. Each time the height is adjusted, the screw must be loosened, the sliding sleeve moved and aligned with the scale, and then tightened again, which is time-consuming and laborious. To address the above problems, we propose an adjustable height net frame device for table tennis training, which can quickly switch between different levels to adapt to different training needs. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable height net frame device for table tennis training, which has the advantage of quickly switching between different levels to adapt to different training needs, and solves the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable height net frame device for table tennis training includes a table panel. Net posts are symmetrically arranged on both sides of the center of the table panel, and the net is connected to the posts by a suspension rope. A mounting rod is coaxially connected to the top of each net post, and a longitudinally arranged adjustment plate is fixed to the top of the mounting rod. An E-shaped adjustment groove is formed on the side of the adjustment plate, consisting of a low groove, a middle groove, a high groove, and a longitudinal groove connecting the three grooves at the same end. A height limiting plate is suspended directly above the net, and locking strips extending in the same direction are fixed to both ends of the height limiting plate, passing through the adjustment grooves. A longitudinally extending limit groove is formed on the outer side of the adjustment plate, and the limit groove engages with a roller. The roller is connected to compression springs on both sides via a rotating shaft, and the other end of the compression spring is fixed to the locking strip.

[0008] Preferably, the adjustment plate is a metal plate symmetrically distributed on both sides of the table panel, and the extension direction of its E-shaped adjustment groove is consistent with the length direction of the table panel.

[0009] Preferably, the low-position groove, the middle-position groove, and the high-position groove have the same horizontal depth, and the depth is greater than 1.5 times the diameter of the snap-fit ​​strip.

[0010] Preferably, the roller is made of nylon, and its outer edge is embedded in the limiting groove. The axial width of the roller is 0.5-1mm less than the width of the limiting groove.

[0011] Preferably, the compression spring is a stainless steel helical spring, with its two ends welded to the end of the rotating shaft and the side wall of the snap-fit ​​strip, respectively.

[0012] Preferably, the low groove is 5-8cm from the top edge of the net, the middle groove is 10-12cm, and the high groove is 15-18cm.

[0013] Preferably, the low-position groove, the middle-position groove, and the high-position groove correspond to the low-position, middle-position, and high-position of the height limit plate, respectively.

[0014] Preferably, the two adjustment plates are located on both sides of the table panel and are symmetrically distributed.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention features an E-shaped channel on the side of the adjustment plate, consisting of a low groove, a middle groove, a high groove, and a longitudinal groove. The horizontal groove and the longitudinal groove are connected to form a switchable path. By vertically moving the locking strip through the longitudinal groove, the target gear groove can be pushed horizontally to quickly achieve height adjustment. The three height levels correspond to the needs of backspin, multi-ball practice, and serve height restriction, respectively, thus improving the targeted nature of specialized training. Attached Figure Description

[0017] Figure 1 This is a first-state diagram of the overall structure of this utility model;

[0018] Figure 2This is a second state diagram of the overall structure of this utility model;

[0019] Figure 3 This is a front view of the overall structure of this utility model;

[0020] Figure 4 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the adjustment plate of this utility model.

[0022] In the diagram: 1. Tabletop; 2. Net post; 3. Net; 4. Mounting rod; 5. Adjustment plate; 6. Low slot; 7. Middle slot; 8. High slot; 9. Longitudinal slot; 10. Height limit plate; 11. Connecting strip; 12. Limiting slot; 13. Roller; 14. Rotating shaft; 15. Compression spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] To address the limitations of existing technologies in achieving rapid height adjustment and meeting diverse training requirements, the following technical solution is proposed. Please refer to [link / reference needed]. Figure 1-5 ;

[0025] An adjustable height net frame device for table tennis training includes a table panel 1. Net posts 2 are symmetrically arranged on both sides of the center of the table panel 1. The net posts 2 are connected to the net 3 by a suspension rope. Each net post 2 has a mounting rod 4 at its top, which is coaxially connected to the net post 2. An adjustment plate 5 is provided at the top of the mounting rod 4. The adjustment plate 5 is arranged longitudinally, and the side of the adjustment plate 5 has an adjustment groove, which includes a low groove 6, a middle groove 7, a high groove 8, and a longitudinal groove 9. The low groove 6, the middle groove 7, the high groove 8, and the longitudinal groove 9 have an E-shaped structure. The low groove 6, the middle groove 7, and the high groove 8 extend horizontally and are parallel to each other, with the extension direction consistent with the length direction of the table panel 1. The adjustment plate 5 is a metal plate symmetrically distributed on both sides of the table panel 1, and the extension direction of its E-shaped adjustment groove is consistent with the length direction of the table panel 1.

[0026] The low groove 6, middle groove 7, and high groove 8 correspond to the low, middle, and high settings of the height limiting plate 10, respectively, which correspond to different arc training heights. For example, the low groove 6 is used when training backspin, and the high groove 8 is used when serving. The same end of the low groove 6, middle groove 7, and high groove 8 is connected to the longitudinal groove 9 to realize the switching of the height limiting plate 10. The low groove 6 is 5-8cm away from the top edge of the net 3, the middle groove 7 is 10-12cm away, and the high groove 8 is 15-18cm away. The two adjustment plates 5 are located on both sides of the table panel 1 and are symmetrically distributed. The low groove 6, middle groove 7, and high groove 8 have the same horizontal depth, and the depth is greater than 1.5 times the diameter of the locking strip 11, to ensure that the adjustment plate 5 can be located directly above the net 3 after adjusting the setting, avoiding positional deviation.

[0027] A height limiting plate 10 is installed at the top of the net 3, suspended parallel to the top of the net 3, forcing the ball's trajectory to be lower than the height of the height limiting plate 10. Each end of the height limiting plate 10 has a locking strip 11. The height limiting plate 10, the net 3, and the locking strips 11 extend in the same direction, passing through an adjustment groove. A limiting groove 12 is longitudinally formed on the outer surface of the adjustment plate 5 away from the longitudinal groove 9. The limiting groove 12 rolls with a roller 13. The roller 13 is made of nylon, and its outer edge is embedded in the limiting groove 12. The axial width of the roller 13 is smaller than the width of the limiting groove 12. The degree is 0.5-1mm. On the one hand, it constrains the vertical movement trajectory of the roller 13, ensuring that the locking strip 11 can only move along the preset path to prevent deviation. On the other hand, the roller 13 can reduce the friction when adjusting the locking strip 11 and improve the smoothness of operation. The roller 13 is coaxially connected to the rotating shaft 14. Each end of the rotating shaft 14 is connected to the two ends of the locking strip 11 through a compression spring 15. The compression spring 15 is located on both sides of the adjusting plate 5. The compression spring 15 is a stainless steel helical spring, and its two ends are welded to the end of the rotating shaft 14 and the side wall of the locking strip 11, respectively.

[0028] When it is necessary to switch gears, pull the locking strips 11 on both sides out of the original gear position into the longitudinal groove 9. At this time, the compression spring 15 is stretched, and the locking strip 11 moves in the longitudinal groove 9 and is pushed back into the target gear position. At this time, the compression spring 15 generates a pulling force on the locking strip 11, so that the locking strip 11 is pressed against the gear position. The compression spring 15 continuously provides radial tension, so that the locking strip 11 is tightly attached to the groove wall, ensuring that the height limit plate 10 does not wobble, thereby ensuring a stable connection between the height limit plate 10 and the adjusting plate 5. The two locking strips 11 must be in the same gear position at the same time to ensure the parallelism of the height limit plate 10.

[0029] Working principle: The mounting rod 4 is vertically installed on the top of the net post 2, and the adjusting plate 5 is fixed to the top of the mounting rod 4. The height limiting plate 10 is inserted into the longitudinal groove 9 of the adjusting plate 5 through the locking strips 11 at both ends, and is pushed horizontally into one of the low groove 6, middle groove 7, or high groove 8, so that the height limiting plate 10 is suspended parallel above the net 3. When the height limit needs to be adjusted, the locking strip 11 is pulled outward, so that it retracts along the current level groove to the longitudinal groove 9. At this time, the compression spring 15 is stretched and stored, and the locking strip 11 is moved vertically in the longitudinal groove 9 to the new level entrance and then released. The compression spring 15 releases its elasticity and automatically pulls the locking strip 11 into the target level groove. If switching from the low groove 6 to the middle groove 7, the roller 13 rolls along the limiting groove 12 to guide the movement of the locking strip 11, ensuring that the movement trajectory of the locking strip 11 is stable. When the player hits the ball, the ball must meet two conditions at the same time: pass over the net 3 and pass under the height limiting plate 10, so as to force the ball trajectory to be lowered.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A height-adjustable net stand device for table tennis training, comprising a table top panel (1), characterized in that, The table panel (1) is symmetrically provided with net posts (2) on both sides of the middle part. The net posts (2) are connected to the net (3) by a suspension rope. The top of the net posts (2) is coaxially connected with an installation rod (4). The top of the installation rod (4) is fixed with a longitudinally arranged adjustment plate (5). The side of the adjustment plate (5) is provided with an E-shaped adjustment groove. The E-shaped adjustment groove is composed of a low groove (6), a middle groove (7), a high groove (8) that are parallel to each other, and a longitudinal groove (9) that connects the three grooves to the same end. A height limit plate (10) is suspended directly above the net (3). The two ends of the height limit plate (10) are fixed with locking strips (11) that extend in the same direction. The locking strips (11) pass through the adjustment groove. The outer side of the adjustment plate (5) is longitudinally provided with a limit groove (12). The limit groove (12) is in rolling cooperation with the roller (13). The roller (13) is connected to the compression springs (15) on both sides through a rotating shaft (14). The other end of the compression spring (15) is fixed to the locking strip (11).

2. The adjustable height net system for table tennis training according to claim 1, wherein, The adjustment plate (5) is a metal plate symmetrically distributed on both sides of the table panel (1), and its E-shaped adjustment groove extends in the same direction as the length of the table panel (1).

3. The adjustable height net system for table tennis training according to claim 2, wherein, The low-position groove (6), middle-position groove (7), and high-position groove (8) have the same horizontal depth, and the depth is greater than 1.5 times the diameter of the snap-fit ​​strip (11).

4. The adjustable height net system for table tennis training according to claim 3, wherein, The roller (13) is made of nylon and its outer edge is embedded in the limiting groove (12). The axial width of the roller (13) is 0.5-1mm less than the width of the limiting groove (12).

5. The adjustable height net system for table tennis training according to claim 4, wherein, The compression spring (15) is a stainless steel helical spring, with its two ends welded to the end of the rotating shaft (14) and the side wall of the snap-fit ​​strip (11), respectively.

6. The adjustable height net system for table tennis training according to claim 5, wherein, The low groove (6) is 5-8cm from the top edge of the net (3), the middle groove (7) is 10-12cm from the top edge, and the high groove (8) is 15-18cm from the top edge.

7. The adjustable height net frame device for table tennis training according to claim 6, characterized in that, The low-position groove (6), the middle-position groove (7), and the high-position groove (8) correspond to the low, middle, and high positions of the height limit plate (10), respectively.

8. The adjustable height net frame device for table tennis training according to claim 7, characterized in that, The two adjustment plates (5) are located on both sides of the tabletop (1) and are symmetrically distributed.

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