CN211025024U

CN211025024U - Wheel type device for body building

Info

Publication number: CN211025024U
Application number: CN201921804405.5U
Authority: CN
Inventors: 唐群涛
Original assignee: Zhangjiagang Huayi Rubber & Plastic Products Co ltd
Current assignee: Jiangsu Huayi Sports Technology Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-17
Anticipated expiration: 2029-10-25

Abstract

The utility model relates to a wheel type device for body building, which comprises a wheel body, wherein the wheel body is a hollow cylinder, the wheel body comprises more than two arc-shaped parts, each arc-shaped part is provided with a first end and a second end, the first end and the second end of each arc-shaped part are respectively provided with a connecting mechanism, and the first end connecting mechanism of one arc-shaped part can be detachably connected with the second end connecting mechanism of the other arc-shaped part; and connecting the arc parts to form a complete wheel body. The wheel type device for body building of the utility model is detachable, and the user can carry the device after detaching the device, thereby reducing the occupied space for carrying; the merchant can disassemble and package the product, so that the transportation and storage cost is reduced. The cushion body and the wheel body are independent, when in use, the cushion body is sleeved on the wheel body, and if one of the cushion body and the wheel body is damaged, only one of the cushion body and the wheel body needs to be replaced; and the user can purchase the cushion body with various colors and types for replacement according to the own requirements, and the applicability is wide.

Description

Wheel type device for body building

Technical Field

The utility model relates to a body-building exercise appurtenance, concretely relates to wheeled device of body-building usefulness.

Background

The wheeled device for fitness mentioned in the present utility model can be used for yoga exercises, in this case, generally called yoga wheel, yoga is an exercise about the body, mind and spirit, originating from india, with the aim of improving the body and psychology of the user. With the gradually enhanced concept of people's fitness, yoga sports began to become popular.

A instrument for assisting yoga exercise is many, for example yoga mat, yoga ball, yoga post, yoga wheel etc. wherein the yoga wheel is as comparatively emerging yoga appurtenance, can help the user to do the yoga action to the at utmost, often uses the yoga wheel to do the action and can let the pliability of health grow, and the yoga wheel also can play very good protection and exercise effect to human backbone, so the yoga wheel slowly fashionable in recent years.

As a wheel type device for exercise, the yoga wheel is generally a hollow cylinder with a cross section similar to a circular ring, as shown in fig. 1 (a); however, contoured yoga wheels exist, which are not circular in cross-section, as shown in fig. 1(b), for example. The hollow structure and the hard characteristic of the yoga wheel cause large occupied space, and bring inconvenience to a user to carry; and when the merchant transports and stores in batches, because the yoga wheel occupation space is big, the cost of transporting and storing the yoga wheel is increased.

Disclosure of Invention

In order to overcome among the prior art wheeled device for body-building problem that occupation space is big when carrying, transporting, storing, the utility model provides a detachable wheeled device for body-building reduces the space that wheeled device took when carrying, transporting, storing, solves the user and carries inconveniently, and the trade company is at the higher problem of cost when transporting in batches, storing.

Based on the above purpose, the technical scheme of the utility model is as follows:

a wheel type device for fitness comprises a wheel body, wherein the wheel body is a hollow cylinder, the wheel body comprises more than two arc-shaped parts, each arc-shaped part is provided with a first end and a second end, the first end and the second end of each arc-shaped part are respectively provided with a connecting mechanism, and the first end connecting mechanism of one arc-shaped part can be detachably connected with the second end connecting mechanism of the other arc-shaped part; and connecting the arc parts to form a complete wheel body.

Wherein, coupling mechanism can adopt tooth structure or tenon fourth of the twelve earthly branches structure. When the connecting mechanism adopts a tooth structure, the corresponding end parts of the connected arc-shaped parts are provided with teeth which are matched with each other, the teeth comprise tooth parts, the tooth part at the first end of one arc-shaped part and the tooth part at the second end of the other arc-shaped part can be spliced with each other, and after the splicing, long holes are formed in the teeth in the axial direction of the wheel body; the wheeled device also includes a plurality of pins for insertion into the elongated holes.

When the connecting mechanism adopts a mortise and tenon structure, the corresponding end parts of the connected arc-shaped parts are provided with a tenon and a mortise which are matched with each other, and after the tenon and the mortise are combined with each other, the combined part forms a long hole along the axial direction of the wheel body; the wheeled device also includes a plurality of pins for insertion into the elongated holes.

The wheel type device further comprises a plug, and the plug is used for sealing the opening of the long hole in the surface of the wheel body.

In order to further increase the load-bearing capacity of the wheeled device, the attachment means of said arc-shaped portion comprises a reinforcing structure.

When the connecting mechanism adopts a tooth structure, the reinforcing structure is specifically arranged as follows: the teeth are provided with protrusions facing the hollow inside of the wheel body, the protrusions are protruded from the tooth portions in the circumferential direction of the wheel body, and the protrusions of the teeth at the first end of one arc-shaped portion and the protrusions of the teeth at the second end of the other arc-shaped portion can be mutually clamped.

When coupling mechanism adopted the mortise-tenon joint structure, additional strengthening specifically arranged as follows: the tip department of arc part is equipped with the orientation a plurality of archs of wheel body inside cavity, the arch is in on the circumferential direction of wheel body compare the tip surface is outstanding, and a plurality of archs of the arc part that connects can joint each other. In order to further enhance the bearing capacity of the mortise and tenon structure, after the plurality of protrusions of the connected arc-shaped parts are mutually clamped, long holes are formed in the protrusions in the axial direction of the wheel body and used for accommodating the pins.

In order to make the yoga wheel more pleasing to the eye, still include the lid at the wheeled device that is equipped with additional strengthening, the lid is used for covering the arch.

Generally, the cross section of the wheel body is circular or elliptical ring and the like.

In order to make the wheeled device more comfortable to use, the outside of the wheel body is provided with a cushion body, and the cushion body is preferably sleeved on the outside of the wheel body; in order to make the wheel type device more beautiful and make the cushion body firmly attached to the wheel body, the cushion body is provided with a covered edge; the outer surface of the cushion body is provided with bulges, so that the wheel type device has a massage function and increases the friction force between the cushion body and a human body; the inner surface of the cushion body is provided with a concave, which can reduce processing materials, and can increase the friction force between the cushion body and the wheel body when the cushion body is sleeved.

The utility model discloses following beneficial effect has:

the wheel type device for body building of the utility model is detachable, and the user can carry the device after detaching the device, thereby reducing the occupied space for carrying; the merchant can disassemble and package the product, so that the transportation and storage cost is reduced. The cushion body and the wheel body are independent, when in use, the cushion body is sleeved on the wheel body, and if one of the cushion body and the wheel body is damaged, only one of the cushion body and the wheel body needs to be replaced; and the user can purchase the cushion body with various colors and types for replacement according to the own requirements, and the applicability is wide.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Certain embodiments of the invention will hereinafter be described in detail by way of example and not limitation with reference to the accompanying drawings, in which like references indicate similar or analogous elements or parts, and it will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale.

In the drawings:

FIG. 1(a) is a schematic end view of a prior art hollow cylindrical wheel unit;

FIG. 1(b) is a schematic end view of a prior art contour wheel apparatus;

fig. 2 is a schematic perspective view of a wheeled exercise device according to a first embodiment of the present invention;

FIGS. 3(a) - (b) are schematic perspective views of the

arcuate portions

2, 3 of the first embodiment, respectively, as separated and joined;

FIGS. 4(a) - (c) are top views of FIG. 2 and show three configurations of the elongated hole formed after the

arcuate portions

2, 3 are connected;

fig. 5 is a perspective view of a wheeled exercise device according to a second embodiment of the present invention;

fig. 6(a) is a schematic front view of the arc-

shaped parts

2 and 3 in a second embodiment, wherein the connecting mechanism 23 is provided with only tenons, and the connecting mechanism 34 is correspondingly provided with mortises;

FIG. 6(b) is a left side view of the arcuate section 2 in the condition of FIG. 6 (a);

FIG. 6(c) is a right side view of the arcuate section 3 in the condition of FIG. 6 (a);

fig. 6(d) is a schematic front view of the second embodiment with the arc-

shaped parts

2 and 3 separated, wherein the connecting mechanism 23 has a tenon and a mortise, and the connecting mechanism 34 has a tenon and a mortise;

FIG. 6(e) is a left side view of the arcuate section 2 in the condition of FIG. 6 (d);

FIG. 6(f) is a right side view of the arcuate section 3 in the condition of FIG. 6 (d);

fig. 7(a) is a schematic perspective view of the wheel body with the reinforcing structure provided at the arc portion according to the first embodiment of the present invention;

FIG. 7(b) is a perspective view of the arcuate section 2 of FIG. 7 (a);

FIG. 7(c) is a perspective view of the

arcuate portions

2, 3 of FIG. 7(a) from another perspective after joining;

fig. 8(a) is a schematic perspective view of a part of a wheel body when the arc-shaped portion is provided with a reinforcing structure according to a second embodiment of the present invention;

FIG. 8(b) is a perspective view of the arcuate section 2 of FIG. 8 (a);

FIG. 8(c) is a left side view of FIG. 8(b) showing the tenon and the protrusion at a position substantially corresponding to the axial direction of the wheel body;

FIG. 8(d) shows a case where the tenon and the projection do not correspond in position in the axial direction of the wheel body;

figure 9 is a schematic view of a wheeled device with a lid;

FIG. 10 is a schematic end view of a detachable special-shaped wheel body according to the present invention;

FIG. 11 is a schematic view of one embodiment of a pad;

FIG. 12 is a schematic view of the main end surface of the cushion body on the wheel body;

FIG. 13 is a schematic end view of a wheel-type device with a covered edge on the cushion body;

FIG. 14 is a schematic view of another embodiment of a pad body.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be embodied in many other forms different from those described herein, and it will be apparent to those skilled in the art that similar modifications may be made without departing from the spirit of the invention, and it is therefore intended that the invention not be limited to the specific embodiments disclosed below.

As shown in fig. 2, a wheel type exercise apparatus according to a first embodiment of the present invention is shown in a perspective view. The wheel device includes a wheel body 1, the wheel body 1 is a hollow cylinder, in this embodiment, the cross section of the wheel body 1 is circular, that is, the wheel body 1 is a hollow cylinder.

The wheel body 1 comprises more than two arc-shaped parts (two, three, four, etc.), each arc-shaped part is provided with a first end and a second end, and the first end and the second end of each arc-shaped part are provided with a connecting mechanism. In the first embodiment, the wheel body 1 is composed of four arc-

shaped portions

2, 3, 4 and 5. Taking the arc-

shaped parts

2 and 3 as an example, fig. 3(a) is a discrete perspective view of the arc-

shaped parts

2 and 3, the arc-shaped part 2 has a first end 21 and a second end 22, the arc-shaped part 3 has a first end 31 and a second end 32, the first end 21 and the second end 22 of the arc-shaped part 2 and the first end 31 and the second end 32 of the arc-shaped part 3 are all provided with a connecting mechanism, the connecting mechanism 23 at the first end 21 of the arc-shaped part 2 and the connecting mechanism 34 at the second end 32 of the arc-shaped part 3 can be detachably connected, and the state after the arc-shaped part 2 is connected with the arc-shaped part 3 is shown in fig. 3 (b). The two ends of the arc-shaped

parts

4 and 5 are also provided with similar connecting mechanisms to connect the arc-shaped

parts

2, 3, 4 and 5 to form the complete wheel body 1.

The aforementioned connection mechanism may be of various structures capable of connecting the two arc-shaped parts together, and preferably, the connection mechanism is capable of achieving seamless connection of the two arc-shaped parts on the outer surface to increase user comfort, structural strength, and the like. In a first embodiment, the coupling mechanism has a tooth structure, and the respective ends of the connected arc-shaped parts are provided with mutually cooperating teeth. Taking arc-shaped

parts

2, 3 as an example, as shown in fig. 3(a), 3(b), arc-shaped part 2 has connection mechanism 23 at its first end 21, connection mechanism 23 has teeth 231, teeth 231 comprise teeth portions 2311, similarly, arc-shaped part 3 has connection mechanism 34 at its second end 32, connection mechanism 34 has teeth 341, teeth 341 comprise teeth portions 3411; the tooth 2311 at the first end 21 of the arc-shaped part 2 and the tooth 3411 at the second end 32 of the arc-shaped part 3 can be spliced with each other, and preferably, after the tooth 2311 and the tooth 3411 are spliced, the outer surface of the wheel body formed at the spliced part is seamless; after the engagement, in order to ensure that the wheel assembly can be sufficiently stressed and the arc-shaped portions will not be separated from each other during use, the

teeth

231 and 341 have slots 2312 formed therein in the axial direction of the wheel body 1, and the wheel assembly 1 further includes a pin inserted into the slots, so that the wheel assembly can maintain the assembled complete wheel body during the stressing.

As for the long hole formed after the connection of the arc-shaped portions, as shown in fig. 4(a) - (c), it may be a through hole in fig. 4(a) or a blind hole in fig. 4(b), (c). In order to enhance the appearance and ensure that the pin is retained in the slot, the wheel device may further include a plug (not shown) for closing the opening of the slot in the surface of the wheel body.

In fig. 3, the arc-shaped

parts

2 and 3 are both four teeth at one end and three teeth at the other end, and similarly, the arc-shaped

parts

4 and 5 are also four teeth at one end and three teeth at the other end, and the four teeth of one arc-shaped part are connected with the three teeth of the other arc-shaped part to finally form the complete wheel body 1; in this case, the structures of the plurality of arc-shaped portions are the same, thereby facilitating the processing. In another mode, the two ends of the arc-shaped parts can be machined to be the same in tooth number, for example, the two ends of the two arc-shaped parts are machined to be four teeth, the two ends of the other two arc-shaped parts are machined to be three teeth, and the two arc-shaped parts can be connected into a complete wheel body 1. Four teeth and three teeth are exemplified here, and the number of teeth is not limited thereto.

Fig. 5 is a perspective view of a wheeled exercise device according to a second embodiment of the present invention. In this embodiment, the connecting mechanism has a mortise and tenon structure, and the corresponding ends of the connected arc-shaped parts are provided with tenons and mortises which are matched with each other. Taking the arc-shaped

parts

2 and 3 as an example, as shown in fig. 6(a) -6(c), the arc-shaped part 2 has a connecting mechanism 23 at the first end 21 thereof, the arc-shaped part 3 has a connecting mechanism 34 at the second end 32 thereof, the connecting mechanism 23 and the connecting mechanism 34 have mutually matched tenons and mortises, for example, the connecting mechanism 23 has a tenon 232, and the connecting mechanism 34 is correspondingly provided with a mortise 343; alternatively, the connecting mechanism 23 may have a mortise 232 and a mortise 233, and the connecting mechanism 34 may be provided with a mortise 343 and a tenon 342, respectively, as shown in fig. 6(d) -6 (f). The coupling mechanism 23 at the first end 21 of the arcuate portion 2 and the coupling mechanism 34 at the second end 32 of the arcuate portion 3 are capable of engaging one another, preferably such that the outer surface of the wheel formed at the engagement is seamless after the coupling mechanism 23 and the coupling mechanism 34 engage one another. After the combination, in order to ensure that the wheel type device can bear enough pressure and the arc parts can not be separated from each other in the use process, the combination of the arc part 2 and the arc part 3 forms a long hole 234 and/or a long hole 344 along the axial direction of the wheel body 1: if only tenon 232 is inserted into mortise 343, long hole 234 is formed; if only the tenon 342 is inserted into the mortise 233, a long hole 344 is formed; if tenon 232 is inserted into mortise 343 and tenon 342 is inserted into mortise 233, then long hole 234 and/or long hole 344 are formed, and the installation can be simplified by providing one long hole, and the structure can be more stable by providing two long holes. The wheel 1 further comprises a pin for insertion into the slot, so that the wheel remains assembled as a complete wheel even during compression. The form of the long hole is similar to that of the first embodiment, and is not described again.

In order to further enhance the load-bearing capacity of the assembled wheel 1, the connection mechanism of each arc-shaped portion further comprises a reinforcing structure.

As shown in fig. 7(a), a reinforcing structure is added to the arc-shaped portion in the first embodiment. Taking the arc-shaped portion 2 as an example, as shown in fig. 7(b), the teeth 231 have protrusions 2313 that are hollow toward the inside of the wheel 1, the protrusions 2313 are provided in one-to-one correspondence with the tooth portions 2311, and the protrusions 2313 protrude in the circumferential direction of the wheel 1 than the tooth portions 2311. As shown in fig. 7(c), the protrusion 2313 of the tooth 231 at the first end 21 of the arc-shaped portion 2 and the protrusion 3413 of the tooth 341 at the second end 32 of the arc-shaped portion 3 can be engaged with each other, and since the protrusion 2313 protrudes from the tooth portion 2311 in the circumferential direction of the wheel body 1, the protrusion 2313 can act on the inner surface of the second end 32 of the arc-shaped portion 3, and similarly, the protrusion 3413 can act on the inner surface of the first end 21 of the arc-shaped portion 2, and the protrusion 2313 and the protrusion 3413 are similar to a reinforcing rib provided at the joint of the arc-shaped portion 2 and the arc-shaped portion 3, thereby enhancing the strength of the joint. Preferably, the tooth part and the bulge are integrally formed, which is more beneficial to improving the strength of the splicing part; further, the entire arc-shaped portion is integrally formed.

As shown in fig. 8(a), a reinforcing structure is added to the arc-shaped portion in the second embodiment. Taking the arc-shaped portion 2 as an example, as shown in fig. 8(b), a plurality of protrusions 235 that are hollow toward the inside of the wheel body 1 are provided at the end portion of the first end 21 of the arc-shaped portion 2, and the protrusions 235 protrude in the circumferential direction of the wheel body 1 than the end surface 211. As shown in fig. 8(a), the end of the second end 32 of the arc-shaped portion 3 is provided with a plurality of protrusions 345 which are hollow towards the inside of the wheel body 1, the protrusions 235 and the protrusions 345 can be mutually clamped, and since the protrusions 235 protrude from the end surface 211 in the circumferential direction of the wheel body 1, the protrusions 235 can act on the inner surface of the second end 32 of the arc-shaped portion 3, and similarly, the protrusions 345 can act on the inner surface of the first end 21 of the arc-shaped portion 2, and the protrusions 235 and the protrusions 345 are similar to the reinforcing ribs provided at the joint of the arc-shaped portion 2 and the arc-shaped portion 3, thereby enhancing the strength of the joint.

Fig. 8(b) shows the positions of the tenon 232 and the protrusion 235 in the axial direction of the wheel body, and fig. 8(c) shows a left side view of fig. 8(b), from which the positional relationship between the tenon 232 and the protrusion 235 in the axial direction of the wheel body is clearly shown; in fact, the position of the tenon 232 in the wheel axial direction is independent of the position of the protrusion 235 in the wheel axial direction, and the positions of the two may be offset, as shown in fig. 8(d), which also has the effect of increasing the strength. Preferably, the entire arc-shaped portion is integrally formed, which is more advantageous in enhancing the strength of the joint.

In order to further improve the bearing capacity and prevent the arc-shaped parts from being separated, the protrusions are clamped, long holes are formed in the protrusions in the axial direction of the wheel body 1, pins are inserted into the long holes, and the design is similar to that of the long holes formed in the teeth or the long holes formed at the mortise-tenon joints, and the detailed description is omitted.

For the structure shown in fig. 7 and 8, in order to enhance the aesthetic appearance, as shown in fig. 9, the wheel-type device may further include a cover 7, and the cover 7 is used for covering the protrusions after the protrusions are engaged.

In the above embodiments, the wheel body may be made of PC (polycarbonate), PP (polypropylene) or ABS (acrylonitrile butadiene styrene), which keeps the cost relatively low while ensuring good weight bearing capacity of the wheel device. The number of the arc-shaped parts is not limited to four in the above embodiment, and may be two or more; when arc part quantity is four, wheel body device is all better in the aspect of bearing, carry volume and the convenient degree of assembly etc. is preferred scheme. In addition, the cross section of the wheel body can be a circular ring shape in fig. 2, or an elliptical ring shape or other shapes conforming to the curve of the human body, the end surface of a detachable special-shaped wheel body is shown in fig. 10, the difference between the arc-shaped part forming the special-shaped wheel body and the arc-shaped part forming the hollow cylindrical wheel body mainly lies in the radian of the middle section of the arc-shaped part, and the design of the two-end connecting mechanisms is similar and is not repeated.

In order to improve the use comfort of the user, a cushion body 8 is arranged on the outer side of the wheel body 1 of the wheel type device, and the cushion body 8 is made of soft material, such as silica gel, TPE (Thermoplastic Elastomer) or EVA (ethylene vinyl acetate copolymer). One embodiment of the cushion body 8 is shown in fig. 11, which is a closed belt-shaped object, after the wheel body 1 is assembled, the cushion body 8 can be sleeved on the wheel body 1, and the state after the cushion body 8 and the wheel body 1 are assembled is shown in fig. 12.

In order to make the wheel type device more beautiful and make the cushion body 8 firmly fit to the wheel body 1, as shown in fig. 13, the cushion body 8 is provided with a covered edge 81, and the covered edge 81 can shield the opening of the long hole on the surface of the wheel body 1, in which case the box cover 7 and/or the plug can be omitted.

As shown in FIG. 11, the outer surface of the pad body 8 can be further provided with a plurality of protrusions 82, so that the wheel-type device has a certain massage effect and increases the friction force between the wheel-type device and the human body; the inner surface of the cushion body 8, namely the part of the cushion body 8 contacting with the outer surface of the wheel body 1, is provided with a plurality of concave parts 83, which not only can reduce the raw materials for processing, but also can increase the friction force between the cushion body 8 and the wheel body 1 and reduce the movement of the cushion body 8 relative to the wheel body 1. The protrusions 82 and depressions 83 may be of any shape.

By adopting the way that the cushion body 8 is sleeved on the wheel body 1, users can purchase cushion bodies 8 with various colors and types according to the needs so as to be convenient for replacement and cleaning. Of course, as shown in fig. 14, the cushion body 8 may also be made into a long strip shape, and after the wheel body 1 is assembled, the cushion body 8 is adhered to the wheel body 1 by means of adhesion.

The utility model discloses wheeled device's equipment mode as follows:

firstly, connecting a plurality of arc-shaped parts into a complete wheel body through connecting mechanisms, specifically, combining the connecting mechanisms at two corresponding ends of the arc-shaped parts together to form the long holes, and inserting a plurality of pins into the long holes; if the plug is provided, the plug is used for sealing the long hole, and if the box cover is provided, the box cover is arranged at each connecting part.

Then, the cushion body is sleeved or stuck on the wheel body, and the cushion can be used.

If the wheel type device needs to be disassembled, the pad body is firstly removed, then the box cover (if the box cover is provided) is opened, the plug (if the box cover is provided) is removed, then the pin is ejected out by using a matched ejector rod small tool or other rod-shaped objects capable of entering the long hole, or the pin is directly poured out of the long hole (in this case, the diameter of the pin is smaller than that of the long hole), and then all arc-shaped parts are separated.

The utility model discloses a wheeled device usage is various, and comparatively conventional user mode lies on wheeled device, then rolls the massage backbone from top to bottom or lies quietly, can offset user's sedentary tension and fatigue that brings to can open the shoulder joint better, extend the backbone.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A wheel type device for fitness comprises a wheel body, wherein the wheel body is a hollow cylinder, and is characterized in that the wheel body comprises more than two arc-shaped parts, each arc-shaped part is provided with a first end and a second end, the first end and the second end of each arc-shaped part are respectively provided with a connecting mechanism, and the first end connecting mechanism of one arc-shaped part can be detachably connected with the second end connecting mechanism of the other arc-shaped part; and connecting the arc parts to form a complete wheel body.

2. A wheeled device according to claim 1, characterised in that the connecting means has a tooth arrangement, the respective ends of the connected arcuate portions being provided with cooperating teeth, said teeth comprising tooth portions, the tooth portion at a first end of one arcuate portion being capable of interengaging with the tooth portion at a second end of the other arcuate portion, and, after interengagement, the teeth having elongate holes formed therein in the axial direction of the wheel body; the wheeled device also includes a plurality of pins for insertion into the elongated holes.

3. The wheeled device of claim 1, wherein the connecting means has a mortise and tenon structure, and the corresponding ends of the connected arc-shaped portions are provided with a tenon and a mortise which are engaged with each other, and after the tenon and the mortise are engaged with each other, the engagement portion forms a long hole along the axial direction of the wheel body; the wheeled device also includes a plurality of pins for insertion into the elongated holes.

4. A wheeled device according to claim 2 or 3, further comprising a plug for closing an opening of the slot in the surface of the wheel.

5. A wheeled device according to any one of claims 1 to 3 wherein the attachment means of the arcuate sections includes a reinforcing structure.

6. A wheeled device according to claim 2, characterised in that the teeth have protrusions which are hollow towards the inside of the wheel body, which protrusions protrude in the circumferential direction of the wheel body beyond the teeth portions, the protrusions of the teeth at the first end of one arc-shaped portion and the protrusions of the teeth at the second end of the other arc-shaped portion being capable of mutual engagement.

7. A wheel assembly according to claim 3, wherein the arcuate portions are provided at their ends with a plurality of projections which are hollow towards the interior of the wheel, the projections projecting in the circumferential direction of the wheel beyond the end surface, the projections of the adjoining arcuate portions being capable of interlocking with one another.

8. The wheel assembly of claim 7, wherein the plurality of projections of the adjoining arcuate portions snap into engagement with each other, and wherein the projections have elongated holes formed therein in an axial direction of the wheel body, the elongated holes being adapted to receive the pins.

9. A wheeled device according to any one of claims 6 to 8 further including a cover for covering the projections.

10. A wheeled device according to any one of claims 1 to 3 wherein the wheel body is circular or elliptical in cross section.

11. A wheeled device according to any one of claims 1 to 3 wherein a pad is provided on the outside of the wheel.

12. The wheeled device of claim 11 wherein the pad is mounted on the outside of the wheel.

13. The wheeled device of claim 11 wherein said pad has a hem.

14. The wheeled device of claim 11 wherein said pad body is provided with protrusions on an outer surface and/or recesses on an inner surface.