MOVABLE BEARING DEVICE

Abstract

A movable bearing device includes a base, a plurality of casters, and a plurality of foot pads. The casters are provided on the bottom of the base. The foot pads are movably connected to the bottom of the base in a way that the foot pads are moved upwards and downwards with respect to the base. When the foot pads are moved downwards until their bottom surfaces each have a height equal to or lower than the bottom edges of the casters, the movable bearing device is supported on the ground by means of the foot pads, such that the movable bearing device cannot be moved. When the foot pads are moved upwards until their bottom surfaces each have a height higher than the bottom edges of the casters, the movable bearing device can be moved by means of the casters so as to facilitate the handling work.

Claims

1. A movable bearing device comprising: a base; a plurality of casters attached to a bottom of the base and protruded from the bottom of the base; and a plurality of foot pads movably connected to the bottom of the base and movable relative to the base between a first position where bottom surfaces of the foot pads each have a height not higher than bottom edges of the casters, and a second position where the bottom surfaces of the foot pads each have a height higher than the bottom edges of the casters.

2. The movable bearing device as claimed in claim 1, wherein the base includes a support frame having a plurality of threaded holes, and a top plate disposed on a top surface of the support frame and having a plurality of top holes; each of the foot pads includes a pad body and a screw having a top end thereof inserted into one respective top hole and a bottom end thereof connected with one respective pad body; the screws of the casters are respectively screwed to the threaded holes such that the foot pads are movable relative to the base between the first position where the top ends of the screws are not protruded from the top holes and the bottom surfaces of the pad bodies each have a height not higher than the bottom edges of the casters, and the second position where the top ends of the screws are protruded from the top holes and the bottom surfaces of the pad bodies each have a height higher than the bottom edges of the casters.

3. The movable bearing device as claimed in claim 2, wherein the base includes a bottom plate mounted to a bottom surface of the support frame and provided with a plurality of bottom holes and a plurality of openings; the screw of each of the foot pads passes through one respective bottom hole; a part of each of the casters is received in one respective opening.

4. The movable bearing device as claimed in claim 2, wherein the support frame includes a frame body, a plurality of rib portions connected with an inner periphery of the frame body, a plurality of caster supporting portions fixedly connected between the inner periphery of the frame body and one of the rib portions, and a plurality of pad supporting portions; each of the casters is attached to one respective caster supporting portion; each of the threaded holes is formed in one respective pad supporting portion.

5. The movable bearing device as claimed in claim 4, wherein the caster supporting portions each have two lateral walls; each of the casters is rotatably sleeved on a shaft provided with two ends thereof inserted into two shaft holes of the two lateral walls of one respective caster supporting portion; two retaining rings are respectively fastened to two annular grooves each formed in one of the two ends of the shaft.

6. The movable bearing device as claimed in claim 1, wherein the casters each have a plurality of through holes passing through two opposite end surfaces thereof and arranged in an equally spaced manner around a center thereof.

7. The movable bearing device as claimed in claim 1, wherein the casters are moved only in a straight line.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a perspective view of a booth using the bearing device of the present invention.

[0015] FIG. 2 is a top perspective view of the bearing device of the present invention.

[0016] FIG. 3 is a bottom perspective view of the bearing device of the present invention.

[0017] FIG. 4 is an exploded perspective view of the base of the bearing device of the present invention.

[0018] FIG. 5 is a partial enlarged view of FIG. 2.

[0019] FIG. 6 is a partial exploded view of FIG. 5.

[0020] FIG. 7 is a partial enlarged view of FIG. 3.

[0021] FIG. 8 is a partial exploded view of FIG. 7.

[0022] FIG. 9 is a cross-sectional view of a part of the bearing device of the present invention, showing that the foot pads are located at the first position.

[0023] FIG. 10 is similar to FIG. 9, but showing that the foot pads are located at the second position.

DETAILED DESCRIPTION OF THE INVENTION

[0024] First of all, it is to be mentioned that throughout the specification, including the embodiments described below and the claims, the nouns relating to directionality are based on the directions in the figures. Besides, same reference numerals used in the following preferred embodiments and the appendix drawings designate same or similar elements or the structural features thereof.

[0025] Referring to FIG. 1, the bearing device 10 of the present invention is adapted for a box 12, such as mini karaoke booth, that accommodate a single person or a few people to carry the weight of the human body and related audio-visual equipment. Referring to FIGS. 2 to 4, the bearing device 10 of the present invention comprises a base 20, a plurality of casters 60 (take four as an example), and a plurality of foot pads 70 (take four as an example).

[0026] As shown in FIGS. 4 and 6, the base 20 includes a support frame 30 integrally formed as a one-piece structure and provided with a frame body 31, a first rib portion 34, four second rib portions 35, four caster supporting portions 36, and four pad supporting portions 37. The frame body 31 has a quadrilateral shape with two opposite first frame strips 32 and two opposite second frame strips 33. Two ends of the first rib portion 34 are connected with the inner surfaces of the first frame strips 32, and two ends of each of the second rib portions 35 are connected with the inner surfaces of the second frame strips 33. Further, the second rib portions 35 are vertically connected with the first rib portion 34 and arranged in an equally spaced manner along the extending direction of the first rib portion 34. The caster supporting portions 36 are located in the four corners of the frame body 31, and each have two lateral walls 362 and a top wall 366 connected between the two lateral walls 362, as shown in FIG. 8. The two lateral walls 362 each have a shaft hole 364, and the outer surfaces of the two lateral walls 362 are respectively connected with the first frame strip 32 and the second rib portion 35 closest to the first frame strip 32. The pad supporting portions 37 are located in the four corners of the frame body 31 and respectively connected between the first frame strip 32 and the second rib portion 35 closest to the first frame strip 32, as shown in FIG. 8. The pad supporting portions 37 each have a threaded hole 372 passing through the top and bottom surfaces thereof.

[0027] Further, the base 20 has a quadrilateral top plate 40 and a quadrilateral bottom plate 50. The top plate 40 is located above the support frame 30 and fixedly connected with the top surface of the frame body 31. The bottom plate 50 is located under the support frame 30 and screwed to the bottom surface of the frame body 31. As shown in FIGS. 6 and 8, the four corners of the top plate 40 each have a top hole 42, and the four corners of the bottom plate 50 each have a bottom hole 52 and an opening 54.

[0028] As shown in FIGS. 7 and 8, each of the casters 60 is located between the two lateral walls 362 of one respective caster support portion 36 of the support frame 30. The casters 60 each have a center hole 61 rotatably sleeved on a shaft 64. Two ends of the shaft 64 are respectively inserted into the two shaft holes 364 and each have an annular groove 65. The shaft 64 can be prevented from being disengaged from one respective caster supporting portion 36 by fastening two retaining rings 66 to the two annular grooves 65 of the shaft 64, thereby completing the assembly of the caster 60. By this way, the casters 60 are exposed out of the bottom of the base 20 and partially received in the openings 54 of the bottom plate 50. As shown FIG. 8, the casters 60 each have a plurality of through holes 62 passing through two opposite end surfaces thereof and arranged in an equally spaced manner around the center hole 61, such that the casters 60 each have a cushion effect.

[0029] As shown in FIGS. 7 and 8, each of the foot pads 70 has a screw 72 and a pad body 74 connected with the bottom end of the screw 72. The screw 72 of each of the foot pads 70 passes through one respective bottom hole 52 of the bottom plate 50 from bottom to top and is screwed to one respective threaded hole 372 of the pad supporting portion 37 of the support frame 30. Further, as shown in FIGS. 5 and 6, the top end of each of the screws 72 is inserted into one respective top hole 42 of the top plate 40 from bottom to top.

[0030] It can be known from the above description that a user can drive the foot pads 70 to move upwards and downwards relative to the base 20 by turning the screws 72 from the top holes 42 with a hand tool (such as a screwdriver). When the foot pads 70 are located at a first position P1 as shown in FIG. 9, the top ends of the screws 72 are not protruded from the top holes 42 and the bottom surfaces 76 of the pad bodies 74 each have a height not higher than the bottom edges 63 of the casters 60, such that the bearing device 10 is supported on the ground G by means of the foot pads 70. By this way, the bearing device 10 cannot be moved. However, as shown in FIG. 9, the bottom surfaces 76 of the pad bodies 74 and the bottom edges 63 of the casters 60 are flushed with each other, but in fact, the bottom surfaces 76 of the pad bodies 74 can be adjusted to a height lower than the bottom edges 63 of the casters 60.

[0031] When the foot pads 70 are moved upwards to a second position P2 as shown in FIG. 10, the top ends of the screws 72 are protruded from the top holes 42 and the bottom surfaces 76 of the pad bodies 74 each have a height higher than the bottom edges 63 of the casters 60, such that the casters 60 touch the ground G. By this way, the bearing device 10 can be moved by means of the casters 60 only in a straight line.

[0032] That is to say, the bearing device 10 of the present invention can be adjusted to two different usage modes according to actual needs. When the foot pads 70 are operated to the second position P2 as shown in FIG. 10, the hearing device 10 can be moved to facilitate the handling work. When the foot pads 70 are operated to the first position P1 as shown in FIG. 9, the hearing device 10 is supported on the ground G and unable to be moved. Therefore, the bearing device 10 of the present invention provides considerable freedom of use and flexibility in use.