Wheel mechanism

Abstract

To provide a wheel mechanism that prevents abnormal vibration of a wheel.SOLUTION: A wheel mechanism (1') includes a fixation base (10), a wheel base (12), a wheel (14), a fixation tube (16), and gaskets (18, 20). By arranging the gaskets (18, 20) in the periphery of the fixation tube (16), a vertical motion of the wheel (14) including the wheel base (12) is prevented and abnormal vibration of the wheel (14) is prevented. The upper gasket (18) is arranged between the fixation base (10) and the wheel base (12). In another embodiment, the lower gasket (20) is arranged between the wheel base (12) and the fixation tube (16). When the wheel base is pivotally connected to the fixation base by a rotation shaft, at least one elastic member may be selectively arranged between at least two of the fixation base, the wheel base, and the rotation shaft to prevent abnormal vibration of the wheel.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a wheel mechanism, and more particularly to a wheel mechanism that can prevent abnormal shimmying of a wheel (tire). It relates to a wheel mechanism that can prevent abnormal vibration of the wheel.

Background Art

[0002] A baby stroller is a tool used when parents take a baby or a child shopping. Currently, when the baby stroller moves, the wheels move up and down, and abnormal shimmy occurs. At this time, the wheels may not rotate stably due to the abnormal shimmy. Furthermore, due to the abnormal shimmy, the upper and lower parts collide with each other, generating noise and impairing the comfort of the baby stroller.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to provide a wheel mechanism that can prevent abnormal vibration of the wheels, and thus to solve the above problems.

Means for Solving the Problems

[0004] This is achieved by the wheel mechanisms described in claims 1, 6, and 14. The dependent claims relate to corresponding further improvements and refinements.

[0005] As will be more clearly understood from the following detailed description, the wheel mechanism described in the claims includes a fixed base, a wheel base, wheels, a fixed tube, and an upper gasket. The wheels are pivotally connected to the wheel base. The fixed tube pivotally connects the wheel base and the fixed base. The upper gasket is between the fixed base and the wheel base. fixed base and pivotally connects the fixed base and the wheel base. The upper gasket is between the fixed base and the wheel base. It is disposed therebetween.

[0006] Preferably, the upper gasket is sleeved on the fixed tube.

[0007] Preferably, the wheel mechanism further includes a lower gasket disposed between the wheel base and the fixed tube.

[0008] Preferably, the lower gasket is disposed at the lower end of the fixed tube.

[0009] Preferably, the fixed base has a fixing hole, the wheel base has a through hole, and the end of the fixed tube passes through the through hole and is fixed to the fixing hole, and the fixed tube pivotally connects the wheel base to the fixed base.

[0010] As will be more clearly understood from the following detailed description, the wheel mechanism recited in the claims includes a fixed base, a wheel base, wheels, a fixed tube, and a lower gasket. The wheels are pivotally connected to the wheel base. The fixed tube pivotally connects the wheel base to the fixed base. The lower gasket is disposed between the wheel base and the fixed tube. It is disposed therebetween.

[0011] Preferably, the lower gasket is disposed at the lower end of the fixed tube.

[0012] Preferably, the wheel mechanism further includes an upper gasket disposed between the fixed base and the wheel base.

[0013] Preferably, the upper gasket is sleeved on the fixed tube. <(

[0014] Preferably, the fixed base has a fixing hole, the wheel base has a through hole, and the fixed tube​​​​​​ The end of the "bu" passes through the through-hole and is fixed to the fixing hole, and the fixing tube pivotally connects the wheel base to the fixing base.

[0015] Preferably, the fixing tube is fixed to the fixing base, the fixing tube has a through-hole, the wheel base has a rotating shaft, the rotating shaft is rotatably arranged in the through-hole, and the fixing tube pivotally connects the wheel base and the fixing base. Preferably, the upper part of the rotating shaft abuts against the fixing tube.

[0016]

[0017] Preferably, the wheel base has a directional plate fixed to the rotating shaft, and the lower gasket is arranged on the directional plate.

[0018] As will be more clearly understood from the following detailed description, the wheel mechanism described in the claims includes a fixing base, a wheel base, a wheel, a rotating shaft, and at least one elastic member. The wheel is pivotally connected to the wheel base. The rotating shaft is arranged on one of the fixing base and the wheel base. The wheel base is pivotally connected to the fixing base by the rotating shaft. At least one elastic member is arranged between at least two of the fixing base, the wheel base, and the rotating shaft.

[0019] Preferably, at least one elastic member is arranged between the fixing base and the wheel base and around the rotating shaft.

[0020] Preferably, at least one elastic member is ring-shaped and sleeved on the rotating shaft.

[0021] Preferably, at least one elastic member has at least one protrusion, and at least one protrusion abuts against one of the fixed base and the wheel base.

[0022] Preferably, the fixed base has a through hole, and at least one elastic member is disposed within the through hole and the rotating shaft is disposed on the wheel base, and the rotating shaft is rotatably disposed within the through hole and at least one elastic member is disposed between the fixed base and the rotating shaft. .

[0023] Preferably, the wheel base has a through hole, and at least one elastic member is disposed within the through hole and the rotating shaft is disposed on the fixed base, and the rotating shaft is rotatably disposed within the through hole and at least one elastic member is disposed between the wheel base and the rotating shaft. are.

[0024] Hereinafter, the present invention will be further exemplified with reference to the accompanying drawings.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

DETAILED DESCRIPTION OF THE INVENTION

[0026] Referring to FIGS. 1 to 3, FIG. 1 is a perspective view showing a wheel mechanism 1 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the wheel mechanism 1 shown in FIG. 1, and FIG. 3 is a cross-sectional view showing the wheel mechanism 1 shown in FIG. 1. FIG. 3 is a cross-sectional view showing the wheel mechanism 1 shown in FIG. 1.

[0027] As shown in FIGS. 1 to 3, the wheel mechanism 1 of the present invention includes a fixed base 10, a wheel base 1 2, a wheel 14, a fixed tube 16, and an upper gasket 18. The wheel 14 is pivotally connected to the wheel base 12 so that the wheel 14 can rotate. In this embodiment, two wheels 14 are pivotally connected to the opposite side of the wheel base 12. The fixed tube 1 6 pivotally connects the wheelbase 12 to the fixed base 10. In this embodiment, the fixed base 10 has a fixed hole 100, and the wheelbase 12 has a through hole 120. The end portion of the fixed tube 16 passes through the through hole 120 of the wheelbase 12 and is fixed to the fixed hole 100 of the fixed base 10, and the fixed tube 16 pivotally connects the wheelbase 12 to the fixed base 10. Therefore, the wheelbase 12 equipped with the wheels 14 can rotate around the fixed base 10.

[0028] As shown in FIG. 3, in this embodiment, the upper gasket 18 may be sleeved on the fixed tube 16, and the upper gasket 18 may be sleeved at any position between the opposing ends of the fixed tube 16, for example, at the middle segment of the fixed tube 16 or at a position one-third away from either end of the fixed tube 16. Therefore, after the wheel mechanism 1 is assembled , the upper gasket 18 is disposed between the fixed base 10 and the wheelbase 12. The upper gasket 18 contacts the inner surface 102 of the fixed base 10 and the upper surface 122 of the wheelbase 12 to prevent the wheel 14 equipped with the wheelbase 12 from moving up and down and to prevent abnormal vibration of the wheel 14. Further , since the upper gasket 18 is disposed between the fixed base 10 and the wheelbase 12 , it can further prevent the inner surface 102 of the fixed base 10 and the upper surface 122 of the wheelbase 12 from colliding and generating noise. In this embodiment, the upper gasket 18 can be made of ethylene-vinyl acetate copolymer (EVA), rubber or other elastic materials according to practical applications . . . . . .

[0029] Referring to FIG. 4, FIG. 4 is a cross-sectional view showing a wheel mechanism 1' according to another embodiment of the present invention. The main difference between the wheel mechanism 1' and the above-described wheel mechanism 1 is that, as shown in FIG. 4, the wheel mechanism 1' further includes a lower gasket 20 disposed between the wheel base 12 and the fixed tube 16. In this embodiment, the lower gasket 20 is disposed on the lower edge 160 of the fixed tube 16. Therefore, after the wheel mechanism 1' is assembled, the lower gasket 20 abuts against the bottom surface 124 of the wheel base 12 and the lower edge 160 of the fixed tube 16 to prevent the wheel 14 from moving up and down together with the wheel base 12 and prevent abnormal vibration of the wheel 14. Furthermore, since the lower gasket 20 is disposed between the wheel base 12 and the fixed tube 16, it is possible to further prevent the bottom surface 124 of the wheel base 12 and the lower edge 160 of the fixed tube 16 from colliding and generating noise. In this embodiment, the lower gasket 20 can be made of ethylene-vinyl acetate copolymer (EVA), rubber or other elastic materials according to practical applications.

[0030] Referring to FIG. 5, FIG. 5 is a cross-sectional view showing a wheel mechanism 1'' according to another embodiment of the present invention. The main difference between the wheel mechanism 1'' and the above-described wheel mechanism 1' is that the wheel mechanism 1'' includes only the lower gasket 20 without including the upper gasket 18. In other words, the present invention can dispose only the lower gasket 20 between the wheel base 12 and the fixed tube 16 without disposing the upper gasket 18.

[0031] Referring to FIGS. 6 to 9, FIG. 6 is a perspective view showing a wheel mechanism 3 according to another embodiment of the present invention. is a diagram. FIG. 7 is an exploded perspective view showing the wheel mechanism 3 shown in FIG. 6, and FIG. 8 is a perspective view showing the rotating shaft 320 shown in FIG. 7. FIG. 9 is a partial cross-sectional view showing the wheel mechanism 3 shown in FIG. 6. .

[0032] As shown in FIGS. 6 to 9, the wheel mechanism 3 of the present invention includes a fixed base 30, a wheel base 3 2, a wheel 34, a fixed tube 36, and a lower gasket 40. The wheel 34 is pivotally connected to the wheel base 32 so that the wheel 34 can rotate. The fixed tube 36 pivotally connects the wheel base 32 to the fixed base 30. In this embodiment, the fixed tube 36 is fixed to the fixed base 30. Further, a through hole 360 is provided in the fixed tube 36, and a rotating shaft 320 is provided in the wheel base 32. The rotating shaft 320 is rotatably disposed in the through hole 360, and the fixed tube 36 pivotally connects the wheel base 32 to the fixed base 30. As shown in FIG. 9, the restraint pin 42 is inserted from the side surface of the fixed base 30 into the fixed base 30 and the fixed tube 36 and abuts against the restraint recess 322 of the rotating shaft 320, so that the rotating shaft 320 can be rotatably restrained within the through hole 360 of the fixed tube 36. Therefore, the wheel base 32 provided with the wheel 34 can rotate around the fixed base 30.

[0033] As shown in FIG. 9, the lower gasket 40 is disposed between the wheel base 32 and the fixed tube 36. As shown in FIGS. 7 and 9, the wheel base 32 can have a direction plate 324 fixed to the rotating shaft 320. As shown in FIG. 8, the rotating shaft 320 is a ste ​​​It may have a step 326. Step 326 is used to be welded and positioned with the direction plate 324 so as to determine the length of the rotating shaft 320 exposed from the direction plate 324. The lower gas gasket 40 can be arranged on the direction plate 324. Therefore, after the wheel mechanism 3 is assembled, the lower gas gasket 40 abuts against the direction plate 324 of the wheel base 32 and the lower edge 361 of the fixed tube 36 to prevent the wheel 34 having the wheel base 32 from moving up and down, and prevent abnormal vibration of the wheel 34. Further, since the lower gas gasket 40 is arranged between the wheel base 32 and the fixed tube 36, it is possible to further prevent the direction plate 324 of the wheel base 32 and the fixed tube 36 from colliding and generating noise. In this embodiment, the lower gas gasket 40 can be made of ethylene-vinyl acetate copolymer (EVA), rubber, or other elastic materials according to practical applications. Preferably, the top of the rotating shaft 320 abuts against the fixed tube 36 to prevent the lower gas gasket 40 from being crushed. Furthermore, the lower gas gasket 40 can be interference fit on the rotating shaft 320 to prevent the intrusion of dust. Further, the lower gas gasket 40 can also be interference fit with the lower edge 361 of the fixed tube 36. Further, a lubricant may be added to the outer periphery of the lower gas gasket 40 so that no noise is generated while the lower gas gasket 40 and the fixed tube 36 are under impact. Referring to FIGS. 10 and 11, FIG. 10 is a perspective view showing a wheel mechanism 5 according to another embodiment of the present invention, and FIG. 11 is a perspective view showing the wheel base 52 shown in FIG. 10.

[0034] ​​​​​​​​​​

[0035] As shown in FIGS. 10 and 11, the wheel mechanism 5 includes a fixed base 50, a wheel base 52, a wheel 54, a rotating shaft 56, and at least one elastic member 58. The wheel 54 is pivotally connected to the wheel base 52 so that the wheel 54 can rotate. The rotating shaft 56 is arranged on the wheel base 52, and the wheel base 52 is pivotally connected to the fixed base 50 by the rotating shaft 56. Therefore, the wheel base 52 provided with the wheel 54 can rotate around the fixed base 50. In this embodiment, the wheel mechanism 5 can include four elastic members 58. The four elastic members 58 can be arranged around the rotating shaft 56 on the wheel base 52. Note that the number and position of the elastic members 58 can be determined according to the actual use, so the present invention is not limited to the illustrated embodiment. In this embodiment, the elastic member 58 is circular, but the present invention is not limited thereto. In another embodiment, the elastic member 58 may be rectangular, elliptical, or other shapes according to the actual use. After the wheel mechanism 5 is assembled, the elastic member 58 is arranged between the fixed base 50 and the wheel base 52 to prevent the wheel 54 having the wheel base 52 from moving up and down, and to prevent abnormal vibration of the wheel 54. Further, since the elastic member 58 is arranged between the fixed base 50 and the wheel base 52, it is possible to further prevent the wheel base 52 and the fixed base 50 from colliding and generating noise. In this

[0036] Referring to FIGS. 12 to 14, FIG. 12 shows a wheel mechanism 5' according to another embodiment of the present invention. FIG. 12 is a cross-sectional view, FIG. 13 is a perspective view showing the fixed base 50 shown in FIG. 12, and FIG. 14 is a perspective view showing the elastic member 58 shown in FIG. 13. The main difference between the wheel mechanism 5' and the above-described wheel mechanism 5 is that, as shown in FIGS. 12 to 14, the rotating shaft 56 of the wheel mechanism 5' is arranged on the fixed base 50, and the elastic member 58 of the wheel mechanism 5' is ring-shaped. In this embodiment, the elastic member 58 is sleeved on the rotating shaft 56 and abuts against the fixed base 50. The elastic member 58 can be interference-fitted with the rotating shaft 56 so that the elastic member 58 does not come off the rotating shaft 56 when the wheel base 52 is removed from the fixed base 50. The shape of the elastic member 58 can be an elliptical shape, a circular shape, a rectangular shape, or the like according to the actual use. In another embodiment, the elastic member 58 shown in FIG. 13 can also be replaced with the four elastic members 58 shown in FIG. 11 according to the actual use. As shown in FIG. 12, after the wheel mechanism 5' is assembled, the elastic member is arranged between the fixed base 50 and the wheel base 52 to prevent the wheel 54 having the wheel base 52 from moving up and down and to prevent abnormal vibration of the wheel 54. Furthermore, since the elastic member 58 is arranged between the fixed base 50 and the wheel base 52, it is possible to further prevent the wheel base 52 and the fixed base 50 from colliding and generating noise. The elastic member 58 may be interference-fitted to the contact surface of the wheel base 52 so that the elastic member 58 is surely in close contact with the wheel base 52.

[0037] As shown in FIG. 14, the elastic member 58 can have at least one protrusion 580. In this embodiment, the elastic member 58 can have two protrusions 580. Note that the number and position of the protrusions 58 0 can be determined according to the actual use, so the present invention is not limited to the illustrated embodiment state. After the wheel mechanism 5' is assembled, the protrusion 580 abuts against the wheel base 52. In other words, the elastic member 58 can be partially in contact with the wheel base 52 by the protrusion 580. In another embodiment, the elastic member 58 may not have the protrusion 580. At this time, the elastic member 58 is in surface contact with the wheel base 52. In another embodiment form, the elastic member 58 can also be partially in contact with the fixed base 50 by the protrusion 580 be.

[0038] Referring to FIG. 15, FIG. 15 is a cross-sectional view showing a wheel mechanism 5'' according to another embodiment of the present invention. As shown in FIG. 15, a through hole 500 is provided in the fixed base 50, and the rotating shaft 56 is disposed on the wheel base 52. The main difference between the wheel mechanism 5'' and the above-described wheel mechanism 5 is that the elastic member 58 of the wheel mechanism 5'' is disposed in the through hole 500 of the fixed base 50. And the rotating shaft 56 is rotatably disposed in the through hole 500 of the fixed base 50. As a result, the elastic member 58 is disposed between the fixed base 50 and the rotating shaft 56, and the wheel 54 having the wheel base 52 is prevented from moving up and down, thereby preventing abnormal vibration of the wheel 54. Furthermore, since the elastic member 58 is disposed between the fixed base 50 and the rotating shaft 56, it further prevents the rotating shaft 56 and the fixed base 50 from colliding and generating noise. ​​It can be done. In order for the elastic member 58 to be firmly attached to the rotating shaft 56, the elastic member 58 may be press-fitted onto the contact surface of the rotating shaft 56. In another embodiment, the elastic member 58 can also be embedded at the end of the rotating shaft 56. Referring to FIG. 16, FIG. 16 is a cross-sectional view showing a wheel mechanism 5''' according to another embodiment of the present invention. As shown in FIG. 16, a through hole 520 is formed in the wheel base 52, and a rotating shaft 56 is disposed on the fixed base 50. The main difference between the wheel mechanism 5''' and the above-described wheel mechanism 5 is that the elastic member 58 of the wheel mechanism 5''' is disposed in the through hole 520 of the wheel base 52. And, the rotating shaft 56 is rotatably disposed in the through hole 520 of the wheel base 52, so that the elastic member 58 is disposed between the wheel base 52 and the rotating shaft 56, preventing the wheel 54 provided with the wheel base 52 from moving up and down, and preventing abnormal vibration of the wheel 54. Further, since the elastic member 58 is disposed between the wheel base 52 and the rotating shaft 56, it is possible to further prevent the rotating shaft 56 and the wheel base 52 from colliding and generating noise. In order for the elastic member 58 to be firmly attached to the rotating shaft 56, the elastic member 58 may be press-fitted onto the contact surface of the rotating shaft 56. In another embodiment, the elastic member 58 can also be embedded at the end of the rotating shaft 56. It can be done. In order for the elastic member 58 to be firmly attached to the rotating shaft 56, the elastic member 58 may be press-fitted onto the contact surface of the rotating shaft 56. In another embodiment, the elastic member 58 can also be embedded at the end of the rotating shaft 56.

[0039] Referring to FIG. 16, FIG. 16 is a cross-sectional view showing a wheel mechanism 5''' according to another embodiment of the present invention. As shown in FIG. 16, a through hole 520 is formed in the wheel base 52, and a rotating shaft 56 is disposed on the fixed base 50. The main difference between the wheel mechanism 5''' and the above-described wheel mechanism 5 is that the elastic member 58 of the wheel mechanism 5''' is disposed in the through hole 520 of the wheel base 52. And, the rotating shaft 56 is rotatably disposed in the through hole 520 of the wheel base 52, so that the elastic member 58 is disposed between the wheel base 52 and the rotating shaft 56, preventing the wheel 54 provided with the wheel base 52 from moving up and down, and preventing abnormal vibration of the wheel 54. Further, since the elastic member 58 is disposed between the wheel base 52 and the rotating shaft 56, it is possible to further prevent the rotating shaft 56 and the wheel base 52 from colliding and generating noise. In order for the elastic member 58 to be firmly attached to the rotating shaft 56, the elastic member 58 may be press-fitted onto the contact surface of the rotating shaft 56. In another embodiment, the elastic member 58 can also be embedded at the end of the rotating shaft 56. It can be done. In order for the elastic member 58 to be firmly attached to the rotating shaft 56, the elastic member 58 may be press-fitted onto the contact surface of the rotating shaft 56. In another embodiment, the elastic member 58 can also be embedded at the end of the rotating shaft 56. Referring to FIG. 16, FIG. 16 is a cross-sectional view showing a wheel mechanism 5''' according to another embodiment of the present invention. As shown in FIG. 16, a through hole 520 is formed in the wheel base 52, and a rotating shaft 56 is disposed on the fixed base 50. The main difference between the wheel mechanism 5''' and the above-described wheel mechanism 5 is that the elastic member 58 of the wheel mechanism 5''' is disposed in the through hole 520 of the wheel base 52. And, the rotating shaft 56 is rotatably disposed in the through hole 520 of the wheel base 52, so that the elastic member 58 is disposed between the wheel base 52 and the rotating shaft 56, preventing the wheel 54 provided with the wheel base 52 from moving up and down, and preventing abnormal vibration of the wheel 54. Further, since the elastic member 58 is disposed between the wheel base 52 and the rotating shaft 56, it is possible to further prevent the rotating shaft 56 and the wheel base 52 from colliding and generating noise.

[0040] As described above, in the present invention, by disposing a gasket around the fixed tube, the wheel having the wheel base is prevented from moving up and down, and abnormal vibration of the wheel is prevented. In one embodiment, the upper gasket is disposed between the fixed base and the wheel base. Referring to FIG. 16, FIG. 16 is a cross-sectional view showing a wheel mechanism 5''' according to another embodiment of the present invention. As shown in FIG. 16, a through hole 520 is formed in the wheel base 52, and a rotating shaft 56 is disposed on the fixed base 50. It is possible to prevent the stopper and the wheel base from colliding with each other and generating noise. Another embodiment In the embodiment, the lower gasket is disposed between the wheel base and the fixed tube, and the wheel It is possible to prevent the base and the fixed tube from colliding with each other and generating noise. Also, in the present Invention, the upper gasket and the lower gasket can be simultaneously disposed around the fixed tube to improve the effect of preventing abnormal vibration of the wheels. Needless to say, it is also possible to improve the effect of preventing abnormal vibration of the wheels. Further, in another embodiment In the case where the wheel base is pivotally connected to the fixed base by a rotating shaft, the present invention selectively disposes at least one elastic member between at least two of the fixed base, the wheel base, and the rotating shaft in order to prevent abnormal vibration of the wheels. In the case where the wheel base is pivotally connected to the fixed base by a rotating shaft, the present invention selectively disposes at least one elastic member between at least two of the fixed base, the wheel base, and the rotating shaft in order to prevent abnormal vibration of the wheels. In the case where the wheel base is pivotally connected to the fixed base by a rotating shaft, the present invention selectively disposes at least one elastic member between at least two of the fixed base, the wheel base, and the rotating shaft in order to prevent abnormal vibration of the wheels. In the case where the wheel base is pivotally connected to the fixed base by a rotating shaft, the present invention selectively disposes at least one elastic member between at least two of the fixed base, the wheel base, and the rotating shaft in order to prevent abnormal vibration of the wheels. In the case where the wheel base is pivotally connected to the fixed base by a rotating shaft, the present invention selectively disposes at least one elastic member between at least two of the fixed base, the wheel base, and the rotating shaft in order to prevent abnormal vibration of the wheels.

[0041] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above description. Modifications or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above description. Modifications or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present invention. Modifications or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present invention.

Claims

1. A fixed base (50), a wheel base (52), a wheel (54) pivotally connected to the wheel base (52), a rotating shaft (56) disposed on one of the fixed base (50) and the wheel base (52), wherein the wheel base (52) is pivotally connected to the fixed base (50) by the rotating shaft (56), the rotating shaft (56), at least one elastic member (58) disposed between at least two of the fixed base (50), the wheel base (52), and the rotating shaft (56), and a wheel mechanism (5, 5', 5'', 5'''') comprising the same.

2. The wheel mechanism (5, 5') according to claim 1, wherein the at least one elastic member (58) is disposed between the fixed base (50) and the wheel base (52) and around the rotating shaft (56).

3. The wheel mechanism (5') according to claim 1 or 2, wherein the at least one elastic member (58) is ring-shaped and sleeved on the rotating shaft (56).

4. The wheel mechanism (5') according to claim 3, wherein the at least one elastic member (58) has at least one protrusion (580), and the at least one protrusion (580) abuts against one of the fixed base (50) and the wheel base (52).

5. The fixed base (50) has a through hole (500), the at least one elastic member (58) is disposed in the through hole (500), the rotating shaft (56) is disposed on the wheel base (52), and the rotating shaft (56) is rotatably disposed in the through hole (500) such that the at least one elastic member (58) is disposed between the fixed base (50) and the rotating shaft (56). The wheel mechanism (5'') according to any one of claims 1 to 4.

6. 6. A wheel mechanism (5''') according to any one of claims 1 to 5, wherein the wheel base (52) has a through hole (520), the at least one elastic member (58) is disposed within the through hole (520), the rotating shaft (56) is disposed on the fixed base (50), and the rotating shaft (56) is rotatably disposed within the through hole (520) such that the at least one elastic member (58) is disposed between the wheel base (52) and the rotating shaft (56).

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