TECHNICAL FIELD
The present disclosure relates to the technical field of fitness equipment, and in particular, to a weight adjustable dumbbell assembly.
BACKGROUND
Dumbbells are one of the most popular fitness equipment and include integrated dumbbells and assembled dumbbells. Assembled dumbbells are small in size and adjustable in weight, making them more suitable for daily muscle strength training at home. Currently, a traditional assembled dumbbell includes a dumbbell bar and dumbbell plates, and the quantity of dumbbell plates on the dumbbell bar can be changed to adjust the weight of the dumbbell, thereby matching the training intensity. However, when replacing dumbbell plates from a common dumbbell, the fixing members at two sides need to be removed before taking down the dumbbell plates. The replacement process is very troublesome. In addition, in case of improper operation, the dumbbell plates may injure a user's feet or damage the ground.
SUMMARY
The embodiments of the present disclosure provide a weight-adjustable dumbbell assembly. The weight-adjustable dumbbell assembly includes a dumbbell, which includes a dumbbell bar assembly and a plurality of dumbbell plates. The dumbbell bar assembly includes a dumbbell bar, each of two sides of the dumbbell bar is arranged with a hanging assembly, and the hanging assembly on each of the two sides is mirror-symmetrical to each other. The hanging assembly includes a plurality of locking disks sequentially sleeved outside the dumbbell bar and capable of rotating synchronously with the dumbbell bar; a first surface of the locking disk is provided with a first clamping portion and a second clamping portion, and a first opening and a second opening are defined between the first clamping portion and the second clamping portion. The dumbbell plate is defined with an insertion port, and a first surface of the dumbbell plate is provided with a third clamping portion protruding outward. Each locking disk is configured to hang each corresponding dumbbell plate by means of the first clamping portion engaging with the third clamping portion of the dumbbell plate or by means of the second clamping portion engaging with the third clamping portion of the dumbbell plate.
BRIEF DESCRIPTION OF THE DRAWINGS
The description and drawings that constitute a part of the present disclosure are provided for a further understanding of the present disclosure. The illustrative embodiments and their descriptions are provided for explanation but do not constitute improper limitations on the present disclosure.
FIG. 1 is an overall schematic structural view of a dumbbell according to an embodiment of the present disclosure.
FIG. 2 is a schematic structural view of a dumbbell bar assembly according to an embodiment of the present disclosure.
FIG. 3 is an exploded schematic view of one hanging assembly as illustrated in FIG. 2.
FIG. 4 is a schematic structural view of a first locking disk according to an embodiment of the present disclosure.
FIG. 5 is a schematic structural view of a second locking disk according to an embodiment of the present disclosure.
FIG. 6 is a schematic structural view of a third locking disk according to an embodiment of the present disclosure.
FIG. 7 is a schematic structural view of a fourth locking disk according to an embodiment of the present disclosure.
FIG. 8 is a schematic structural view of a fifth locking disk according to an embodiment of the present disclosure.
FIG. 9 is a cross-sectional view of FIG. 7 along the B-B direction.
FIG. 10 is a perspective view of a dumbbell plate according to an embodiment of the present disclosure.
FIG. 11 is another perspective view of the structure as illustrated in FIG. 10.
FIG. 12 is a cross-sectional view of FIG. 11 along the C-C direction.
FIG. 13 is a cross-sectional view of FIG. 1 along the A-A direction.
FIG. 14 is an enlarged view of part D of FIG. 13.
FIG. 15 is a cross-sectional view of a dumbbell plate and a locking disk locked together according to an embodiment of the present disclosure.
FIG. 16 is a schematic structural view of an adjustment disk according to an embodiment of the present disclosure.
FIG. 17 is a cross-sectional view of a handle and a baffle according to an embodiment of the present disclosure.
FIG. 18 is a schematic structural view of a guide structure and a locking mechanism according to an embodiment of the present disclosure.
FIG. 19 is a schematic structural view of a dividing plate according to an embodiment of the present disclosure.
FIG. 20 is a schematic structural view of a stopper according to an embodiment of the present disclosure.
FIG. 21 is an overall cross-sectional view of a dumbbell assembly according to an embodiment of the present disclosure.
FIG. 22 is an overall cross-sectional view of a tray according to an embodiment of the present disclosure.
DETAILED WAY
The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with various embodiments. Each example is provided to explain but not limit the present disclosure. In fact, it will be clear to those of ordinary skill that modifications and variations may be made without departing from the scope or spirit of the present disclosure. For example, a feature shown or described as part of one embodiment may be used according to another embodiment to produce yet another embodiment. Therefore, it is intended that the present disclosure includes such modifications and variations within the scope of the appended claims and their equivalents.
In the description of the present disclosure, the terms “longitudinal”, “lateral”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom” and the like indicate the orientational or positional relationship based on the orientational or positional relationship illustrated in the drawings, which is only for the convenience of describing and does not require the present disclosure to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure. The terms “connected”, “connecting” and “arranged” used in the present disclosure should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate component; it may also be a wired electrical connection, a radio connection, or a wireless signal connection. For those of ordinary skill in the art, the specific meanings of the above terms may be understood according to the specific circumstances.
One or more examples of the present disclosure are illustrated in the attached drawings. Numbers and letter signs are used in the detailed description to refer to features in the drawings. Similar signs in the drawings and descriptions have been configured to refer to similar parts of the present disclosure. As used herein, the terms “first”, “second” and “third” are used interchangeably to distinguish one component from another and are not intended to indicate the position or importance of individual components.
Referring to FIG. 1, according to an embodiment of the present disclosure, a dumbbell is provided, which includes a dumbbell bar assembly 100 and a plate group 200 arranged on both sides of the dumbbell bar assembly 100. The plate group 200 includes a plurality of dumbbell plates 20. In the present embodiment, each plate group 200 includes five dumbbell plates 20.
As shown in FIG. 2 and FIG. 3, the dumbbell bar assembly 100 includes a dumbbell bar 10 and a handle 11 arranged in a middle portion of the dumbbell bar 10. The handle 11 is defined with a channel 1101 along its axial direction, and the dumbbell bar 10 can rotate along its axial direction in the channel 1101. Each of both sides of the handle 11 is provided with a hanging assembly, and each hanging assembly includes a plurality of locking disks. The quantity of the locking disks is the same as that the dumbbell plates 20. The plurality of locking disks is all sleeved on the dumbbell bar 10 and can rotate synchronously with the dumbbell bar 10.
In some embodiments, the hanging assembly includes five locking discs, which are a first locking disc 15a, a second locking disc 15b, a third locking disc 15c, a fourth locking disc 15d and a fifth locking disc 15e. The first locking disc 15a is close to the handle 11. The structures of the five locking discs are similar, and the similarities between the five locking discs are as follows.
Taking the fourth locking disc 15d as an example, please refer to FIG. 7 to FIG. 9, the fourth locking disc includes a first surface and a second surface facing away from the first surface. The center of the locking disc is defined with a first through hole 1505 and an upright post 1504 extending outward the first surface, and the first through hole 1505 penetrates the upright post 1504. The height of the upright post 1504 is adapted to the thickness of the dumbbell plate 20 and the distance between two adjacent dumbbell plates 20. The locking disk is provided with a first clamping portion 1501 and a second clamping portion 1502 extending outward the first surface. Side walls of the first clamping portion 1501 and the second clamping portion 1502 facing the center of the locking disk are both arc-shaped, the centers of the two arcs share the same center of the locking disk, and the radii of the two arcs are the same. In addition, the first clamping portion 1501 and the second clamping portion 1502 are both provided with a first end and a second end in a counterclockwise direction. A 1503 is defined between the first end of the first clamping portion 1501 and the second end of the second clamping portion 1502, and a second opening is defined between the second end of the first clamping portion 1501 and the first end of the second clamping portion 1502. The upright post 1504 and the locking disk are an integrated structure or a separate structure independent of each other.
The difference between the five locking disks is that as follows.
As shown in FIG. 4 to FIG. 8, the curvature of the first clamping portion 1501 of each of the first locking disk 15a, the second locking disk 15b, the third locking disk 15c, the fourth locking disk 15d and the fifth locking disk 15e gradually increases, while the curvature of the second clamping portion 1502 of each of the first locking disk 15a, the second locking disk 15b, the third locking disk 15c, the fourth locking disk 15d and the fifth locking disk 15e gradually decreases. Correspondingly, the size of the first opening 1503 and the second opening changes accordingly. In some embodiments, the curvature of the first clamping portion 1501 and the second clamping portion 1502 of each of the five locking disks does not gradually change in sequence, and the curvature of each can be arranged as needed to meet different adjustment requirements.
In some embodiments, the structures of the plurality of locking disks and the dumbbell bar 10 are as follows.
As shown in FIG. 3 and FIG. 4, the dumbbell bar 10 is a hexagonal upright post, the first through hole 1505 of the dumbbell plate 20 is a hexagonal through hole, and an outer wall of the hexagonal upright post and an inner wall of the hexagonal through hole are engaged with each other by means of clearance fit. The dumbbell bar 10 and the plurality of dumbbell plates 20 are kept in synchronous rotation by means of the engagement between the above-mentioned hexagonal structures.
As shown in FIG. 2, in some embodiments, an adjustment disk 13 is provided on one end of each hanging assembly away from the handle 11, and the center of the adjustment disk 13 is defined with a hexagonal through hole having a same shape with the dumbbell plate 20, and the adjustment disk 13 is fixedly sleeved on an outermost side of the dumbbell bar 10.
As shown in FIG. 3, in the present embodiment, the adjustment disk 13 includes a dial 132 and a knob 131, the dial 132 is provided on a side close to the dumbbell plate 20, the center of the dial 132 is defined with the hexagonal through hole, and the knob 131 is fixedly connected to the dial 132. An outer edge of the dial 132 is provided with a plurality of weight indicators along its circumference. When the adjustment disk 13 is rotated, the dumbbell plate 20 corresponding to each weight indicator is selected and hung on the dumbbell bar assembly 100. An end of the dumbbell bar 10 is installed with a bolt 17, which restricts the corresponding adjustment disk 13 and the hanging assembly on the dumbbell bar 10.
As shown in FIG. 10 to FIG. 12, the dumbbell plate 20 includes a first surface and a second surface facing away from the first surface. A top of the dumbbell plate 20 is defined with a U-shaped insertion port 201 along its radial direction, an outer wall of the upright post 1504 of the locking disk is engaged with an inner wall of the insertion port 201 by means of clearance fit, and the upright post 1504 of the locking disk can reciprocate along an opening direction of the insertion port 201. The first surface of the dumbbell plate 20 is provided with a third clamping portion 202 protruding outward.
In some embodiments, the third clamping portion 202 is arranged in an opposite direction of the opening direction of the insertion port 201. An end of the third clamping portion 202 facing away from the insertion port 201 is defined with a clamping groove along the circumference of the dumbbell plate 20.
In some embodiments, a weight plate 203 is provided on the first surface or/and the second surface of the dumbbell plate 20, and the weight plate 203 is defined with a U-shaped receiving groove 204 along the same opening direction as the insertion port 201. An outer wall of the locking disk is engaged with an inner wall of the receiving groove 204 by means of clearance fit, and the locking disk can reciprocate along the opening direction of the receiving groove 204. The specifications of the plurality of dumbbell plates 20 can be the same, while the weight of each dumbbell plate 20 can be adjusted by the weight plate. The weight and size of the weight plate can be controlled through different materials and structures. Therefore, with the same appearance, the dumbbell with a variety of different weights can be designed.
Please refer to FIG. 14, taking the structure of one side of the dumbbell as an example, the dumbbell plate 20 and the locking disk correspond to each other, and the dumbbell plate 20 include a first dumbbell plate 20a, a second dumbbell plate 20b, a third dumbbell plate 20c, a fourth dumbbell plate 20d and a fifth dumbbell plate 20e. When the dumbbell bar assembly 100 and the dumbbell plate assembly 200 are combined, the first surface of the dumbbell plate 20 is inserted close to the first surface of the corresponding locking disk until the locking disk and the dumbbell plate 20 abut against each other. The locking disk and the dumbbell plate 20 abut against each other, including the upright post 1504 of the locking disk abutting against a bottom of the insertion port 201 of the dumbbell plate 20, or/and an outer peripheral wall of the locking disk abutting against a bottom of the receiving groove 204. During the process of the dumbbell plate 20 plugging into the locking disk, the third clamping portion 202 of the dumbbell plate 20 passes through the first opening 1503 or the second opening of the locking disk.
When adjusting the weight, the adjustment disk 13 is rotated to drive the locking disk and the dumbbell bar 10 to rotate synchronously. When the third clamping portion 202 of the dumbbell plate 20 is located between the first clamping portion 1501 or the second clamping portion 1502 of the corresponding locking disk and the upright post 1504, the dumbbell plate 20 and its corresponding locking disk are connected.
For example, as shown in FIG. 15, which is a cross-sectional view of the first clamping portion 1501 of the first locking disk 15a and the third clamping portion 202 of the first dumbbell plate 20a in the locked state. In this case, the bottom of the insertion port 201 of the first dumbbell plate 20a is restricted by the upright post 1504 of the locking disk, and the third clamping portion 202 of the dumbbell plate 20 is restricted by the first clamping portion 1501 of the first locking disk 15a, then the first dumbbell plate 20a and the first locking disk 15a are interlocked.
In addition, as shown in FIG. 15, in the present embodiment, the weight plate is arranged on the first surface of the first dumbbell plate 20a, and the first clamping portion 1501 of the first locking disk 15a is located between the third clamping portion 202 of the first dumbbell plate 20a and an inner wall of the receiving groove 204, such that the third clamping portion 202 of the first dumbbell plate 20a and the bottom of the receiving groove 204 are both restricted by the first clamping portion 1501 of the first locking disk 15a, then the first dumbbell plate 20a and the first locking disk 15a can also be interlocked.
As shown in FIG. 4 to FIG. 8, in some embodiments, the quantity N of the adjustment partitions of each locking disk equals to M*2+2. N is the quantity of the adjustment partitions of each locking disk; M is the quantity of the locking disks of each hanging assembly. N is an integer not smaller than 0; M is an integer not smaller than 0. In the present embodiment, the quantity of the locking disks of each hanging assembly is 5, so the locking disks are evenly divided into 12 adjustment intervals, and the arc of one adjustment partition is 30 degrees. Among the five locking disks, the first end of the first clamping portion 1501 is the same, and the first end of the second clamping portion 1502 is the same. The arc value of the first clamping portion 1501 of the first locking disk 15a is 30 degrees, the arc value of the second clamping portion 1502 is 150 degrees, and the arc value of the first opening 1503 is 30 degrees. From the first locking disk 15a to the fifth locking disk 15e, the arc value of the first clamping portion 1501 increases by 30 degrees successively, the arc value of the second clamping portion 1502 decreases by 30 degrees successively, and the arc value of the first opening 1503 increases by 30 degrees successively. Among the five dumbbell plates 20, the weights of the first dumbbell plate 20a to the fourth dumbbell plate 20d are the same, and the weight of the fifth dumbbell plate 20e is relatively smaller. In the present embodiment, by rotating the adjustment disk 13 clockwise or counterclockwise, a variety of ways of hanging the dumbbell plates 20 can be achieved.
Example 1: The hanging assemblies on both sides of the dumbbell bar are arranged in mirror symmetry. The weight of each of the first dumbbell plate 20a to the fourth dumbbell plate 20d of each hanging assembly is 2 pounds, the weight of the fifth dumbbell plate 20e is 0.5 pounds, and the weight of the dumbbell bar assembly 100 is 3 pounds. The five locking disks are assembled according to the order shown in FIG. 3, and the five dumbbell plates are plugged into the locking disks according to the order shown in FIG. 14. When the adjustment disk 13 is rotated clockwise, each adjustment rotates by the arc value of an adjustment interval. The times of adjustments and the weight of the dumbbell are as follows.
|
Adjustment
Total weight of
Weight of the
Total weight of
|
times
the dumbbell plates
dumbbell bar
the dumbbell
|
|
|
0
3 pounds
3
pounds
|
1
(2 pounds*4 +
3 pounds
20
pounds
|
0.5 pounds) *2
|
2
(2 pounds*3 +
3 pounds
16
pounds
|
0.5 pounds) *2
|
3
(2 pounds*2 +
3 pounds
12
pounds
|
0.5 pounds) *2
|
4
(2 pounds*1 +
3 pounds
8
pounds
|
0.5 pounds) *2
|
5
0.5 pounds*2
3 pounds
4
pounds
|
6
3 pounds
3
pounds
|
7
(2 pounds*4 +
3 pounds
20
pounds
|
0.5 pounds) *2
|
8
2 pounds*4*2
3 pounds
19
pounds
|
9
2 pounds*3*2
3 pounds
15
pounds
|
10
2 pounds*2*2
3 pounds
11
pounds
|
11
2 pounds*1*2
3 pounds
7
pounds
|
|
As shown in FIG. 16, the total weight of the dumbbells corresponding to the 0th to 11th times is marked on the dial 132 in a clockwise direction, and the total weight of the current dumbbells can be directly viewed.
In Example 1, the hanging assembly is designed as a mirror symmetry, the purpose of which is that when adjusting the weight, the weight on both sides of the dumbbell bar is balanced, and the balance can be better maintained during training.
In Example 2, the hanging assemblies on both sides of the dumbbell bar are mirror symmetric. The weight of each of the first dumbbell plate 20a to the fourth dumbbell plate 20d of each hanging assembly is 6 pounds, the weight of the fifth dumbbell plate 20e is 3 pounds, and the weight of the dumbbell bar assembly 100 is 5 pounds. The five locking disks are assembled according to the order shown in FIG. 3, and the five dumbbell plates are plugged into the locking disks according to the order in FIG. 14. When the adjustment disk 13 is rotated clockwise, each adjustment rotates an adjustment interval, and ten different total weights can also be adjusted. In Example 2, the weight of the fifth dumbbell plate 20e is ½ of that of the first dumbbell plate 20a.
In some embodiments, the quantity and weight of the dumbbell plates 20, the degree of an adjustment interval, and the quantity of corresponding locking disks, the arc value and position of the first clamping portion 1501, the arc value and position of the second clamping portion 1502, etc. can be arranged as needed. The number, weight, and position in the above embodiments are all exemplary.
Please refer to FIG. 2 and FIG. 17, in some embodiments, a baffle 12 is provided on each of both ends of the handle 11, and the baffles 12 are fixedly sleeved outside the handle 11. A top plate 14 is provided above the hanging assembly, and a first end of the top plate 14 is fixedly connected to a top of the baffle 12. When the dumbbell plate 20 is plugged into the dumbbell bar assembly 100, a side wall of the top plate 14 is connected with an inner wall of the insertion port 201 of the dumbbell plate 20 by clearance fit. When adjusting the weight of the dumbbell, the dumbbell plate 20 is limited by the top plate 14 in the circumferential direction to prevent the dumbbell plate 20 from rotating relative to the locking disk, such that the handle 11, the baffle 12, the top plate 14 and the dumbbell plate 20 remain relatively stationary in the circumferential direction.
To adjust the amplitude of each time of adjustment to the arc value of an adjustment interval, the dumbbell bar assembly 100 is provided with a guide structure. As shown in FIG. 17 to FIG. 19, the guide structure includes a dividing plate 16 arranged between the baffle 12 and the hanging assembly, and the center of the dividing plate 16 is defined with a through hole having a same shape with that of the dumbbell plate 20, for example, the through hole is a hexagonal through hole in the above embodiments. The dividing plate 16 is sleeved outside the dumbbell bar 10 and rotates synchronously with the dumbbell bar 10. A dividing ring 1601 shares the same center is provided on one side of the dividing disk 16. An outer wall of the dividing ring 1601 is evenly distributed with a plurality of guide grooves 1602. A cross section of the guide groove 1602 is a smooth arc shape and two adjacent guide grooves 1602 are closely connected. The quantity of guide grooves 1602 is the same as that of the locking disk.
The guide structure also includes a guide member 1604. An end face of a first end of the guide member 1604 is a smooth arc surface. One side of the baffle 12 close to the dividing disk 16 is defined with a cavity 1201. A circumference of the side wall of the cavity 1201 is defined with at least one first slide groove 1605 for accommodating the guide member 1604. A guide member 1604 is installed in each first slide groove 1605, and the guide member 1604 can reciprocate in the first slide groove 1605 along the radial direction of the cavity 1201. To keep the guide member 1604 with an inward movement tendency, a first spring 1606 is arranged in the first slide groove 1605, one end of the first spring 1606 abuts against one end of the first slide groove 1605 away from the cavity 1201, and another end abuts against a second end of the guide member 1604.
When the dividing plate 16 rotates, the first end of the guide member 1604 always abuts against the outer wall of the dividing ring 1601 under the elastic force of the first spring 1606. Since the adjacent guide grooves 1602 are closely connected, and the cross-section of the guide groove 1602 is an arc structure. Therefore, the guide member 1604 is only allowed to stay in one of the guide grooves 1602, and the degree of each rotation is an arc value of an adjustment interval.
In addition, after the weight is adjusted, the handle can still drive the locking disk to rotate. If the locking disk rotates to a certain angle, the dumbbell plate 20 will break away from the restraint of the locking disk and fall off from the hanging assembly. Therefore, in some embodiments, the dumbbell bar assembly 100 is provided with a locking mechanism.
As shown in FIG. 17 to FIG. 20, the locking mechanism includes a stopper 1607 for limiting the rotation of the dividing plate 16 and a plurality of locking grooves 1603 evenly distributed on the inner wall of the dividing ring 1601, and the quantity of the locking grooves 1603 is the same as that of the locking disk. The baffle 12 is defined with a second slide groove 1608 along the radial direction of the cavity 1201, a first end of the second slide groove 1608 is close to the center of the cavity 1201, and a second end is a notch 1609 provided on a side wall of the baffle 12, and the stopper 1607 is placed in the second slide groove 1608 and can reciprocate along the length direction of the second slide groove 1608. In order to keep the stopper 1607 with a radial outward movement tendency along the cavity 1201, a second spring 1610 is arranged in the second slide groove 1608. A first end of the second spring 1610 abuts against the first end of the second slide groove 1608, and a second end of the second spring 1610 abuts against a first end of the stopper 1607. The stopper 1607 is provided with a locking block 1611 matched with the locking groove 1603, and the second end of the stopper 1607 is provided with a pressing portion 1612. The pressing portion 1612 of the stopper 1607 is pressed to make the stopper 1607 move toward the inner side of the cavity 1201. In this case, the locking mechanism is in an unlocked state, and the second spring 1610 is in a compressed state. The dividing plate 16 is rotated, and the dividing ring 1601 can pass between the locking block 1611 and the pressing portion 1612 of the stopper 1607 without restriction. When the dividing plate 16 rotates to a certain position, the pressure of the pressing portion 1612 of the stopper 1607 is released, and the stopper 1607 moves to the outside of the cavity 1201 under the elastic force of the second spring 1610. The locking block 1611 of the stopper 1607 is engaged in the locking groove 1603 of the dividing ring 1601, such that the dividing plate 16 cannot rotate relative to the baffle 12. In this case, the locking mechanism is in a locked state.
Since the dumbbell bar 10, the locking disk and the adjustment disk 13 are all in a synchronous state with the dividing plate 16, when the locking mechanism is in a locked state, the locking disk cannot rotate relative to the dumbbell plate 20.
The present disclosure also discloses a dumbbell assembly, as shown in FIG. 21 and FIG. 22, including the above-mentioned dumbbell, and a tray 300 for placing the dumbbell. A top of the tray 300 is provided with a plurality of parallel plug-in plates 301. The spacing between adjacent plug-in plates 301 is equivalent to the thickness of the dumbbell plate 20, and the dumbbell plate 20 can be placed vertically between two adjacent plug-in plates 301.
To engage with the locking mechanism, a locking post 302 is provided on the top of the tray 300, and the second end of the second slide groove 1608 of the locking mechanism is provided on the bottom of the baffle 12. When the dumbbell falls on the top of the tray 300, the locking post 302 can extend into the second slide groove 1608 and apply pressure to the stopper 1607, and the stopper 1607 moves inward, such that the locking mechanism is in the unlocked state. In this case, the adjustment disk 13 can be rotated to select a suitable weight. Then, the dumbbell is lifted from the tray 300, the locking post 302 is disengaged from the second slide groove 1608, the stopper 1607 moves outward under the elastic force of the first spring 1606, the locking block 1611 of the stopper 1607 enters the locking groove 1603, and the locking mechanism is locked.
In some embodiments, a plurality of rubber anti-slipping pads is provided on the bottom of the tray 300, which are configured to prevent the tray 300 from scratching the ground when the tray 300 is placed on the ground, and also to prevent the tray 300 from sliding freely on the ground.
The above description is only some embodiments of the present disclosure and is not intended to limit the present disclosure. For those of ordinary skill in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.
Patent Application
20250135261
