Foldable wheel seat

A foldable wheel seat has a base, an operating bar, a first rotating shaft and two wheel axles. The base has a groove formed in a top face of the base. The operating bar is mounted pivotally in the groove of the base. The first rotating shaft is mounted rotatably in the base and has at least one end and two pulling segments. The at least one end of the first rotating shaft is extended into the groove of the base and is securely connected to the operating bar. The pulling segments are mounted on the first rotating shaft and each pulling segment has two pulling tabs. The wheel axles are mounted rotatably in the base and are perpendicular to the first rotating shaft and below the pulling segments of the first rotating shaft. Each wheel axle has an engaging block, at least two wheels, a holding panel and a torsional spring.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a wheel seat, and more particularly to a foldable wheel seat that can be used conveniently.

2. Description of Related Art

A conventional foldable wheel seat is mounted securely on a bottom of a storage container, a trolley or a golf bag and has a base and multiple wheels mounted on the base, therefore users can move the heavy storage container, the trolley or the golf bag easily.

However, when the users want to fold the wheels of the conventional foldable wheel seat relative to the base, they have to turn the bottom of the storage container, the trolley or the golf bag over firstly and this is inconvenient in use.

To overcome the shortcomings, the present invention provides a foldable wheel seat to mitigate or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide a foldable wheel seat that can be used conveniently.

The foldable wheel seat in accordance with the present invention has a base, an operating bar, a first rotating shaft and two wheel axles. The base has a top face, a chamber and a groove. The groove is formed in the top face of the base. The operating bar is mounted pivotally in the groove of the base. The first rotating shaft is mounted rotatably in the chamber of the base near a rear end and has at least one end and two pulling segments. The at least one end of the first rotating shaft is extended into the groove of the base and is securely connected to the operating bar. The pulling segments are mounted on the first rotating shaft and each pulling segment has two pulling tabs. The wheel axles are mounted rotatably in the base and are perpendicular to the first rotating shaft and below the pulling tabs of the pulling segments of the first rotating shaft. Each wheel axle has an engaging block, at least two wheels, a holding panel and a torsional spring.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference toFIGS. 1 to 3,7and8, a foldable wheel seat in accordance with the present invention can be mounted securely on a bottom of a storage container or a golf bag and has a base (10,10A,10B), an operating bar (20,20A,20B), a first rotating shaft (30,30A,30B), a second rotating shaft (40), a linking beam (50), two wheel axles (60) and a drive pedal (70).

The base (10,10A,10B) may be rectangular and has a top face, a bottom face, a middle, a front end, a rear end, two side edges, a chamber, an opening, a groove (11,11A,11B), an elongated through hole, two guide frames (12) and multiple mounting frames (13). The chamber is defined in the base (10,10A,10B) between the faces of the base (10,10A,10B). The opening is formed through the bottom face of the base (10,10A,10B) and communicates with the chamber. The groove (11,11A,11B) may be U-shaped or elongated shaped, is formed in the top face of the base (10,10A,10B) and may be formed along the front end and the side edges or along one of the side edges of the base (10,10A,10B) and has at least one end adjacent to the rear end of the base (10,10A,10B). The elongated through hole is formed through the rear end of the base (10,10A,10B) near the middle. The guide frames (12) may be L-shaped and are mounted on the bottom of the base (10,10A,10B) near the elongated through hole and face to each other. The mounting frames (13) may be L-shaped and are mounted on the bottom of the base (10,10A,10B) in pairs.

The operating bar (20,20A,20B) may be U-shaped or elongated shaped and is mounted pivotally in the groove (11,11A,11B) of the base (10,10A,10B).

The first rotating shaft (30,30A,30B) is mounted rotatably in the chamber of the base (10,10A,10B) between two mounting frames (13) near the rear end of the base (10,10A,10B) and has two ends, a middle, two pulling segments (31), a connecting beam (32) and two positioning elements (33). At least one end of the first rotating shaft (30,30A,30B) is extended into the groove (11,11A,11B) of the base (10,10A,10B) near the rear end and is securely connected to the operating bar (20,20A,20B) by fasteners.

The pulling segments (31) are mounted on the first rotating shaft (30,30A,30B) near the ends and each pulling segment (31) has two pulling tabs (311). The pulling tabs (311) are mounted on the first rotating shaft (30,30A,30B), are parallel with each other and are protruded to the rear end of the base (10,10A,10B), and each pulling tab (311) has a contacting side.

The connecting beam (32) is mounted on the middle of the first rotating shaft (30,30A,30B) between the pulling segments (31) and has a connecting end.

The positioning elements (33) are mounted on the first rotating shaft (30,30A,30B) between the pulling segments (31) and the connecting beam (32) and each positioning element (33) has an engaging gap.

The second rotating shaft (40) is mounted rotatably in the chamber of the base (10,10A,10B) between two mounting frames (13) near the middle of the base (10,10A,10B), are parallel with the first rotating shaft (30,30A,30B) and has two ends, a middle, two pulling segments (41) and a connecting beam (42). The pulling segments (41) are mounted on the second rotating shaft (40) near the ends and align with the pulling segments (31) of the first rotating shaft (30,30A,30B), and each pulling segment (41) has two pulling tabs (411). The pulling tabs (411) are mounted on the second rotating shaft (40), are parallel with each other and are protruded to the rear end of the base (10,10A,10B), and each pulling tab (411) has a contacting side. The connecting beam (42) is mounted on the middle of the second rotating shaft (40) between the pulling segments (41) and has a connecting end aligned with the connecting end of the connecting beam (32) of the first rotating shaft (30,30A,30B).

The linking beam (50) is mounted in the chamber of the base (10,10A,10B) between the rotating shafts (30,30A,30B,40) and has two linking ends. The linking ends of the linking beam (50) are respectively connected pivotally to the connecting ends of the connecting beams (32,42) of the rotating shafts (30,30A,30B,40).

The wheel axles (60) are mounted in the chamber of the base (10,10A,10B) respectively near the side edges, are perpendicular to the rotating shafts (30,30A,30B,40) and are located below the pulling tabs (311,411) of the pulling segments (31,41) of the rotating shafts (30,30A,30B,40). Each wheel axle (60) has two ends, two engaging blocks (61), at least two wheels (62), a holding panel (64) and a torsional spring (63).

The ends of the wheel axle (60) are respectively connected to the mounting frames (13) near the ends of the base (10,10A,10B). The engaging blocks (61) may be T-shaped, are mounted on the wheel axle (60) below the pulling segments (31,41) of the rotating shafts (30,30A,30B,40). The wheels (62) are mounted on the wheel axle (60) between the ends and the engaging blocks (61) of the wheel axle (60). The holding panel (64) is mounted on the wheel axle (60) near the first rotating shaft (30,30A,30B). The torsional spring (63) is mounted around the wheel axle (60) near the holding panel (64) and has two ends. One of the ends of the torsional spring (63) is connected to the holding panel (64) and the other end is connected to the bottom of the base (10,10A,10B).

The drive pedal (70) is movably connected to the base (10,10A,10B) in the elongated through hole and has two opposite sides, an inner side, a bottom, two returning springs (71) and two loops (72). The opposite sides of the drive pedal (70) face respectively to the guide frames (12) of the base (10,10A,10B). The inner side of the drive pedal (70) contacts with the rear end of the base (10,10A,10B). The returning springs (71) are connected to the opposite sides of the drive pedal (70) and are connected to the guide frames (12) of the base (10,10A,10B) to make the drive pedal (70) moving up relative to the base (10,10A,10B). The loops (72) may be U-shaped, are mounted on the bottom of the drive pedal (70), protrude out of the inner side of the drive pedal (70) below the positioning elements (33) of the first rotating shaft (30,30A,30B) and selectively engage the gaps of the positioning elements (33).

With reference toFIGS. 4,5,7and8, when the operating bar (20,20A,20B) is rotated upward and out of the groove (11,11A,11B) in the base (10,10A,10B), the first rotating shaft (30,30A,30B) will be rotated with the operating bar (20,20A,20B). When the first rotating shaft (30,30A,30B) is rotated by the operating bar (20,20A,20B), the pilling segments (31), the connecting beam (32) and the positioning elements (33) on the first rotating shaft (30,30A,30B) will rotate downward relative to the wheel axles (60). When the connecting beam (32) is rotated by the first rotating shaft (30), the linking beam (50) will move forward and push the connecting beam (42) of the second rotating shaft (40) to rotate. As the connecting beam (42) being rotated by the linking beam (50), the second rotating shaft (40) will rotate relative to the wheel axles (60).

Then, the connecting sides of the pulling tabs (311,411) of the pulling segments (31,41) on the rotating shafts (30,30A,30B,40) will contact with and push against the engaging blocks (61) of the wheel axles (60) to make the wheel axles (60) rotating relative to the base (10,10A,10B). With the rotation of the wheel axles (60), the wheels (62) on the wheel axles (60) will be expanded out of the chamber of the base (10,10A,10B) to contact the ground. At the same time, the positioning elements (33) will push against the loops (72) of the drive pedal (70) to move the drive pedal (70) downward, and the returning springs (71) will provide a force to move the drive pedal (70) upward when the gaps of the positioning elements (33) face the loops (72) to engage the loops (72) with the gaps in the positioning elements (33). With the engagement between the positioning elements (33) with the loops (72), the first rotating shaft (30,30A,30B) can be prevented from rotating to the original position. Accordingly, the wheel seat can be expanded to an operation condition to allow a user to push or pull a storage container or a golf bag easily.

With reference toFIG. 6, the user can fold the foldable wheel seat by pushing drive pedal (70) downward relative to the base (10,10A,10B) and rotating the operating bar (20,20A,20B) return into the groove (11,11A,11B). Then, the loops (72) on the bottom of the drive pedal (70) will separate from the positioning elements (33), and the pulling tabs (311,411) of the pulling segments (31,41) will separate from the engaging blocks (61) of the wheel axles (60). When the engaging blocks (61) separate from the pulling segments (31,41) of the rotating shafts (30,30A,30B,40), the torsional springs (63) will rotate the wheel axles (60) to the original position to make the wheels (62) held in the chamber of the base (10,10A,10B). Therefore, the foldable wheel seat as described can be folded conveniently to reduce the space for storing and transporting without turning the bottom of the foldable wheel seat over.