CN210009592U - A liftable table tennis table - Google Patents

A liftable table tennis table Download PDF

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Publication number
CN210009592U
CN210009592U CN201920162786.5U CN201920162786U CN210009592U CN 210009592 U CN210009592 U CN 210009592U CN 201920162786 U CN201920162786 U CN 201920162786U CN 210009592 U CN210009592 U CN 210009592U
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gear
welded
inner cavity
round shaft
screw rod
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徐阳
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Qilu Normal University
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Qilu Normal University
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Abstract

本实用新型公开了一种可升降式乒乓球台,包括桌面,所述桌面的顶端前后两端中心位置均焊接有立柱,所述桌面的底端右侧焊接有矩形箱,所述立柱的内腔顶端沿上下方向轴接有螺杆,且螺杆的底端延伸至矩形箱的内腔,所述立柱的内侧开设有通孔,所述螺杆的外壁螺纹连接有螺纹筒。该可升降式乒乓球台,通过顺时针旋转第二圆轴,带动第一圆轴顺时针旋转,第二齿轮顺时针跟随旋转,带动第一齿轮逆时针旋转,使螺杆逆时针旋转,通过螺杆逆时针旋转,将螺纹筒在螺杆的外壁向上移动,使球网同时向上移动,可以调节球网的高度,可以根据训练需求调节球网的高度,不需要进行更换球网更改高度,省时省力,且减少了人员的劳动量。

Figure 201920162786

The utility model discloses a liftable table tennis table, comprising a table top, a top, front and rear ends of the table top are welded with a column at the center positions, a rectangular box is welded on the right side of the bottom end of the table, and an inner cavity of the column is welded. The top end is axially connected with a screw rod along the up-down direction, and the bottom end of the screw rod extends to the inner cavity of the rectangular box. The liftable table tennis table, by rotating the second circular shaft clockwise, drives the first circular shaft to rotate clockwise, the second gear rotates clockwise, and drives the first gear to rotate counterclockwise, so that the screw rotates counterclockwise, and the screw rotates counterclockwise. Rotate clockwise to move the threaded barrel upward on the outer wall of the screw, so that the net moves upward at the same time, the height of the net can be adjusted, and the height of the net can be adjusted according to the training needs, without changing the height of the net, saving time and effort, And reduce the workload of personnel.

Figure 201920162786

Description

一种可升降式乒乓球台A liftable table tennis table

技术领域technical field

本实用新型涉及乒乓球台技术领域,具体为一种可升降式乒乓球台。The utility model relates to the technical field of table tennis tables, in particular to a liftable table tennis table.

背景技术Background technique

乒乓球台是乒乓球运动的老式乒乓球台器械,台面可由任何材料制作,具有一定弹性,球网包括网,网柱,支架三部分,网将台面分成大小相等的两部分,网垂直于台面,于端线平行,现有的球网均为固定高度,不可根据训练需求调节球网的高度,需要进行更换球网更改高度,费时费力,且加大了人员的劳动量。The table tennis table is an old-fashioned table tennis table equipment for table tennis. The table top can be made of any material and has a certain elasticity. The net consists of three parts: net, net column and bracket. The net divides the table into two equal parts. The end lines are parallel, and the existing nets are all fixed heights. The height of the nets cannot be adjusted according to training needs. It is necessary to replace the nets to change the height, which is time-consuming and labor-intensive, and increases the workload of personnel.

实用新型内容Utility model content

本实用新型的目的在于提供一种可升降式乒乓球台,以解决上述背景技术中提出的问题。The purpose of the present invention is to provide a liftable table tennis table to solve the problems raised in the above background technology.

为实现上述目的,本实用新型提供如下技术方案:一种可升降式乒乓球台,包括桌面,所述桌面的顶端前后两端中心位置均焊接有立柱,所述桌面的底端右侧焊接有矩形箱,所述立柱的内腔顶端沿上下方向轴接有螺杆,且螺杆的底端延伸至矩形箱的内腔,所述立柱的内侧开设有通孔,所述螺杆的外壁螺纹连接有螺纹筒,且螺纹筒位于立柱的内腔底端,所述立柱的内腔外侧沿上下方向开设有滑槽,所述滑槽的内腔底端卡接有相匹配的滑块,所述滑块的内侧与螺纹筒焊接,所述螺纹筒的内侧焊接有连接杆,且连接杆的内侧延伸出通孔,所述连接杆的内侧焊接有球网,所述螺杆的底端焊接有第一齿轮,所述矩形箱的内腔沿前后方向轴接有第一圆轴,所述第一圆轴的外壁前后两端均过盈配合有与第一齿轮相啮合的第二齿轮,所述矩形箱的内腔前侧沿左右方向轴接有第二圆轴,且第二圆轴位于第一圆轴的底端,所述第二圆轴的右侧延伸出矩形箱,所述第二圆轴的外壁左侧过盈配合有与第二齿轮相啮合的第三齿轮,所述第二圆轴的右侧焊接有把手,所述桌面的底端左右两侧均焊接有桌腿。In order to achieve the above purpose, the present utility model provides the following technical solutions: a liftable table tennis table, including a table top, the top of the table top, front and rear ends are welded with uprights, and the bottom right side of the table top is welded with a rectangle. The top end of the inner cavity of the column is axially connected with a screw rod along the up-down direction, and the bottom end of the screw rod extends to the inner cavity of the rectangular box, the inner side of the column is provided with a through hole, and the outer wall of the screw rod is threadedly connected with a threaded barrel , and the threaded cylinder is located at the bottom end of the inner cavity of the column, the outer side of the inner cavity of the column is provided with a chute along the up-down direction, and the bottom end of the inner cavity of the chute is clamped with a matching slider, the The inner side is welded with the threaded barrel, the inner side of the threaded barrel is welded with a connecting rod, and the inner side of the connecting rod extends out of a through hole, the inner side of the connecting rod is welded with a ball net, and the bottom end of the screw rod is welded with a first gear, The inner cavity of the rectangular box is axially connected with a first circular shaft along the front and rear directions, and the front and rear ends of the outer wall of the first circular shaft are interference-fitted with a second gear that meshes with the first gear. The front side of the inner cavity is axially connected with a second round shaft along the left and right direction, and the second round shaft is located at the bottom end of the first round shaft, the right side of the second round shaft extends out of a rectangular box, and the second round shaft The left side of the outer wall is interference-fitted with a third gear that meshes with the second gear, a handle is welded on the right side of the second round shaft, and table legs are welded on the left and right sides of the bottom end of the table top.

优选的,所述螺杆的外壁上半部分设有螺纹,所述螺杆的下半部分无螺纹。Preferably, the upper half of the outer wall of the screw is provided with threads, and the lower half of the screw has no threads.

优选的,所述连接杆延伸出通孔的距离为1cm。Preferably, the distance that the connecting rod extends out of the through hole is 1 cm.

优选的,所述第三齿轮的直径小于第二齿轮的直径。Preferably, the diameter of the third gear is smaller than the diameter of the second gear.

优选的,所述螺杆外壁螺纹的高度与通孔的内侧高度相同。Preferably, the height of the thread on the outer wall of the screw is the same as the height of the inner side of the through hole.

与现有技术相比,本实用新型的有益效果是:该可升降式乒乓球台,通过顺时针旋转第二圆轴,第三齿轮跟随顺时针旋转,带动第一圆轴顺时针旋转,第二齿轮顺时针跟随旋转,带动第一齿轮逆时针旋转,使螺杆逆时针旋转,通过螺杆逆时针旋转,将螺纹筒在螺杆的外壁向上移动,使球网同时向上移动,可以调节球网的高度,可以根据训练需求调节球网的高度,不需要进行更换球网更改高度,省时省力,且减少了人员的劳动量。Compared with the prior art, the beneficial effect of the present utility model is that: in the liftable table tennis table, by rotating the second circular shaft clockwise, the third gear rotates clockwise, driving the first circular shaft to rotate clockwise, and the second circular shaft rotates clockwise. The gear rotates clockwise, and drives the first gear to rotate counterclockwise, so that the screw rotates counterclockwise. Through the counterclockwise rotation of the screw, the threaded barrel moves upward on the outer wall of the screw, so that the ball net moves upward at the same time, and the height of the ball net can be adjusted. The height of the net can be adjusted according to the training needs, and there is no need to replace the net to change the height, which saves time and effort, and reduces the labor of personnel.

附图说明Description of drawings

图1为本实用新型结构示意图;Fig. 1 is the structural representation of the utility model;

图2为本实用新型右视剖视的结构示意图;Fig. 2 is the structural representation of the right side sectional view of the present utility model;

图3为本实用新型A处放大的结构示意图。FIG. 3 is an enlarged schematic structural diagram of the utility model A. FIG.

图中:1、桌面,2、立柱,3、矩形箱,4、螺杆,5、通孔,6、螺纹筒,7、滑槽,8、滑块,9、连接杆,10、球网,11、第一齿轮,12、第一圆轴,13、第二齿轮,14、第二圆轴,15、第三齿轮,16、把手,17、桌腿。In the picture: 1, desktop, 2, column, 3, rectangular box, 4, screw, 5, through hole, 6, threaded barrel, 7, chute, 8, slider, 9, connecting rod, 10, ball net, 11. The first gear, 12, the first round shaft, 13, the second gear, 14, the second round shaft, 15, the third gear, 16, the handle, 17, the table legs.

具体实施方式Detailed ways

下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

请参阅图1-3,本实用新型提供一种技术方案:一种可升降式乒乓球台,包括桌面1,桌面1的顶端前后两端中心位置均焊接有立柱2,桌面1的底端右侧焊接有矩形箱3,立柱2的内腔顶端沿上下方向轴接有螺杆4,且螺杆4的底端延伸至矩形箱3的内腔,立柱2的内侧开设有通孔5,螺杆4的外壁螺纹连接有螺纹筒6,且螺纹筒6位于立柱2的内腔底端,螺纹筒6可在螺杆4的外顶端上下移动,立柱2的内腔外侧沿上下方向开设有滑槽7,滑槽7的内腔底端卡接有相匹配的滑块8,滑块8可在滑槽7的内腔上下往复滑动,滑块8的内侧与螺纹筒6焊接,螺纹筒6向上移动可带动滑块8同时向上移动,螺纹筒6的内侧焊接有连接杆9,且连接杆9的内侧延伸出通孔5,连接杆9向上移动可带动球网10向上移动,连接杆9的内侧焊接有球网10,螺杆4的底端焊接有第一齿轮11,第二齿轮13顺时针旋转可带动第一齿轮11逆时针旋转,矩形箱3的内腔沿前后方向轴接有第一圆轴12,第一圆轴12的外壁前后两端均过盈配合有与第一齿轮11相啮合的第二齿轮13,第三齿轮15顺时针旋转可带动第二齿轮13顺时针旋转,矩形箱3的内腔前侧沿左右方向轴接有第二圆轴14,且第二圆轴14位于第一圆轴12的底端,第二圆轴14的右侧延伸出矩形箱3,第二圆轴14顺时针旋转可带动第三齿轮15顺时针旋转,第二圆轴14的外壁左侧过盈配合有与第二齿轮13相啮合的第三齿轮15,第二圆轴14的右侧焊接有把手16,桌面1的底端左右两侧均焊接有桌腿17。1-3, the present utility model provides a technical solution: a liftable table tennis table, including a table top 1, the top of the table top 1 is welded with uprights 2 at the center positions of the front and rear ends, and the right side of the bottom end of the table top 1 is welded. The rectangular box 3 is welded, the top of the inner cavity of the column 2 is axially connected with a screw 4 along the up-down direction, and the bottom end of the screw 4 extends to the inner cavity of the rectangular box 3, the inner side of the column 2 is provided with a through hole 5, and the outer wall of the screw 4 A threaded barrel 6 is threadedly connected, and the threaded barrel 6 is located at the bottom end of the inner cavity of the column 2. The threaded barrel 6 can move up and down on the outer top of the screw 4. The outer side of the inner cavity of the column 2 is provided with a chute 7 along the upper and lower directions. The bottom end of the inner cavity of 7 is clamped with a matching sliding block 8. The sliding block 8 can slide up and down in the inner cavity of the chute 7. The inner side of the sliding block 8 is welded with the threaded barrel 6, and the upward movement of the threaded barrel 6 can drive the sliding block. The block 8 moves upward at the same time, the inner side of the threaded barrel 6 is welded with a connecting rod 9, and the inner side of the connecting rod 9 extends out of the through hole 5. The upward movement of the connecting rod 9 can drive the ball net 10 to move upward, and the inner side of the connecting rod 9 is welded with a ball. The net 10, the bottom end of the screw 4 is welded with a first gear 11, the clockwise rotation of the second gear 13 can drive the first gear 11 to rotate counterclockwise, the inner cavity of the rectangular box 3 is axially connected with a first circular shaft 12 along the front and rear directions, The front and rear ends of the outer wall of the first round shaft 12 are interference-fitted with a second gear 13 that meshes with the first gear 11 . The clockwise rotation of the third gear 15 can drive the second gear 13 to rotate clockwise. The front side of the cavity is axially connected with a second round shaft 14 along the left and right direction, and the second round shaft 14 is located at the bottom end of the first round shaft 12, the right side of the second round shaft 14 extends out of the rectangular box 3, and the second round shaft 14 Clockwise rotation can drive the third gear 15 to rotate clockwise, the left side of the outer wall of the second round shaft 14 is fitted with a third gear 15 that meshes with the second gear 13, and the right side of the second round shaft 14 is welded with a handle 16. Table legs 17 are welded on the left and right sides of the bottom end of the desktop 1 .

作为优选方案,更进一步的,螺杆4的外壁上半部分设有螺纹,螺杆4的下半部分无螺纹,当滑块8移动至滑槽7内腔底端时,促使螺纹筒6移动至螺杆4外壁螺纹的底端,避免螺纹筒6继续移动。As a preferred solution, further, the upper half of the outer wall of the screw 4 is provided with threads, and the lower half of the screw 4 has no threads. When the slider 8 moves to the bottom end of the inner cavity of the chute 7, the threaded barrel 6 is urged to move to the screw. 4. The bottom end of the outer wall thread to prevent the threaded barrel 6 from continuing to move.

作为优选方案,更进一步的,连接杆9延伸出通孔5的距离为1cm,减少连接杆9所占用的空间,同时可防止球网在移动时与立柱2碰撞。As a preferred solution, further, the distance that the connecting rod 9 extends out of the through hole 5 is 1 cm, which reduces the space occupied by the connecting rod 9 and prevents the ball net from colliding with the column 2 when moving.

作为优选方案,更进一步的,第三齿轮15的直径小于第二齿轮13的直径,在带动第二齿轮13旋转时更加省力,因为第三齿轮15的力臂小于第二齿轮13的力臂,致使第二三齿轮15动力点的动力大于第二齿轮13的阻力点的阻力,所以省力As a preferred solution, further, the diameter of the third gear 15 is smaller than the diameter of the second gear 13, which saves more effort when driving the second gear 13 to rotate, because the lever arm of the third gear 15 is smaller than the lever arm of the second gear 13, As a result, the power of the power point of the second and third gears 15 is greater than the resistance of the resistance point of the second gear 13, so labor is saved.

作为优选方案,更进一步的,螺杆4外壁螺纹的高度与通孔5的内侧高度相同,保证螺纹筒6移动至螺杆4的外壁向上移动时,连接杆9可正常在通孔5的内侧向上移动。As a preferred solution, further, the height of the thread on the outer wall of the screw 4 is the same as the height of the inner side of the through hole 5 to ensure that when the threaded barrel 6 moves to the outer wall of the screw 4 and moves upward, the connecting rod 9 can normally move upward on the inner side of the through hole 5 .

其详细连接手段,为本领域公知技术,下述主要介绍工作原理以及过程,具体工作如下。The detailed connection means are known in the art. The following mainly introduces the working principle and process, and the specific work is as follows.

使用时,用手顺时针旋转把手16,促使第二圆轴14顺时针旋转,第三齿轮15跟随顺时针旋转,带动第二齿轮13顺时针旋转,促使第一圆轴12顺时针旋转,保证两个第二齿轮13同时同步旋转,第二齿轮13顺时针旋转带动第一齿轮11逆时针旋转,促使螺杆4逆时针旋转,带动螺纹筒6在螺杆4的外壁向上移动,同时滑块8在滑槽7的内腔向上滑动,带动连接杆9在通孔5的内侧同时向上移动,促使球网10向上移动,将球网10升高,用手逆时针旋转把手16,促使第二圆轴14逆时针旋转,第三齿轮15跟随逆时针旋转,带动第二齿轮13逆时针旋转,促使第一圆轴12逆时针旋转,保证两个第二齿轮13同时同步旋转,第二齿轮13逆时针旋转带动第一齿轮11顺时针旋转,促使螺杆4顺时针旋转,带动螺纹筒6在螺杆4的外壁向下移动,同时滑块8在滑槽7的内腔向下滑动,带动连接杆9在通孔5的内侧同时向下移动,促使球网10向下移动,将球网10降低,使用方便,可快速的更改球网10的高度,无需更换球网10,减少生产成本,有利于装置的推广和使用。When in use, rotate the handle 16 clockwise by hand to make the second round shaft 14 rotate clockwise, and the third gear 15 rotates clockwise, driving the second gear 13 to rotate clockwise, and urges the first round shaft 12 to rotate clockwise to ensure The two second gears 13 rotate synchronously at the same time. The clockwise rotation of the second gear 13 drives the first gear 11 to rotate counterclockwise, which causes the screw 4 to rotate counterclockwise, which drives the threaded barrel 6 to move upward on the outer wall of the screw 4, while the slider 8 is at the same time. The inner cavity of the chute 7 slides upward, driving the connecting rod 9 to move upward at the same time on the inside of the through hole 5, prompting the ball net 10 to move upward, raising the ball net 10, and rotating the handle 16 counterclockwise by hand to promote the second round shaft 14 rotates counterclockwise, the third gear 15 rotates counterclockwise, drives the second gear 13 to rotate counterclockwise, and drives the first circular shaft 12 to rotate counterclockwise to ensure that the two second gears 13 rotate synchronously at the same time, and the second gear 13 rotates counterclockwise The rotation drives the first gear 11 to rotate clockwise, which drives the screw 4 to rotate clockwise, which drives the threaded barrel 6 to move down on the outer wall of the screw 4, and at the same time, the slider 8 slides down in the inner cavity of the chute 7, which drives the connecting rod 9 to move downward. The inner side of the through hole 5 moves downward at the same time, which urges the net 10 to move downward, lowers the net 10, is convenient to use, can quickly change the height of the net 10, does not need to replace the net 10, reduces the production cost, and is beneficial to the device promotion and use.

在本实用新型的描述中,需要理解的是,术语“同轴”、“底部”、“一端” 、 “顶部”、“中部”、“另一端”、“上”、“一侧”、“顶部”、“内”、“前部”、“中央”、“两端”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本实用新型和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作;同时除非另有明确的规定和限定,术语“卡接”、“轴接”、“插接”、“焊接”、“旋接”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系,除非另有明确的限定,对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本实用新型中的具体含义。In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", " The orientation or positional relationship indicated by "top", "inside", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description , rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation; at the same time, unless otherwise expressly specified and limited, the terms "snap connection", "shaft connection", "plug connection" ”, “welding”, “spinning” and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection , it can also be indirectly connected through an intermediate medium, it can be the connection between the two elements or the interaction relationship between the two elements, unless otherwise clearly defined, for those of ordinary skill in the art, the above terms can be understood according to specific circumstances. The specific meaning in the utility model.

尽管已经示出和描述了本实用新型的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本实用新型的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. The utility model provides a liftable formula table tennis table, includes desktop (1), its characterized in that: the table top is characterized in that columns (2) are welded at the center positions of the front end and the rear end of the top end of the table top (1) and the center positions of the front end and the rear end of the top end of the table top (1), a rectangular box (3) is welded at the right side of the bottom end of the table top (1), a screw rod (4) is axially connected to the top end of an inner cavity of the column (2) along the upper direction and the lower direction, the bottom end of the inner cavity of the screw rod (4) extends to the inner cavity of the rectangular box (3), a through hole (5) is formed in the inner side of the column (2), a threaded cylinder (6) is connected to the outer wall of the screw rod (4) in a threaded mode, a sliding groove (7) is formed in the outer side of the inner cavity of the column (2) along the upper direction and the lower direction, a matched sliding block (8) is clamped to the bottom, a net (10) is welded on the inner side of the connecting rod (9), a first gear (11) is welded at the bottom end of the screw rod (4), the inner cavity of the rectangular box (3) is axially connected with a first round shaft (12) along the front and back direction, the front end and the rear end of the outer wall of the first round shaft (12) are respectively provided with a second gear (13) which is engaged with the first gear (11) in an interference fit manner, the front side of the inner cavity of the rectangular box (3) is axially connected with a second round shaft (14) along the left-right direction, the second round shaft (14) is positioned at the bottom end of the first round shaft (12), a rectangular box (3) extends out of the right side of the second round shaft (14), a third gear (15) meshed with the second gear (13) is in interference fit with the left side of the outer wall of the second round shaft (14), the right side welding of second circle axle (14) has handle (16), table leg (17) have all been welded to the bottom left and right sides of desktop (1).
2. The table tennis table of claim 1, wherein: the upper half part of the outer wall of the screw rod (4) is provided with threads, and the lower half part of the screw rod (4) is unthreaded.
3. The table tennis table of claim 1, wherein: the distance that the connecting rod (9) extends out of the through hole (5) is 1 cm.
4. The table tennis table of claim 1, wherein: the diameter of the third gear (15) is smaller than the diameter of the second gear (13).
5. The table tennis table of claim 1, wherein: the height of the screw thread on the outer wall of the screw rod (4) is the same as the height of the inner side of the through hole (5).
CN201920162786.5U 2019-01-30 2019-01-30 A liftable table tennis table Expired - Fee Related CN210009592U (en)

Priority Applications (1)

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CN201920162786.5U CN210009592U (en) 2019-01-30 2019-01-30 A liftable table tennis table

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Application Number Priority Date Filing Date Title
CN201920162786.5U CN210009592U (en) 2019-01-30 2019-01-30 A liftable table tennis table

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112369806A (en) * 2020-11-23 2021-02-19 王莹 Table tennis table convenient to adjust for physical training
CN112983618A (en) * 2021-02-04 2021-06-18 耿继承 Internal combustion engine generator set noise reduction mute box with balanced strength and rigidity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112369806A (en) * 2020-11-23 2021-02-19 王莹 Table tennis table convenient to adjust for physical training
CN112983618A (en) * 2021-02-04 2021-06-18 耿继承 Internal combustion engine generator set noise reduction mute box with balanced strength and rigidity

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