US 12,496,957 B2Granted

Strap roller

AssigneeStrong Yun Industrial Co., Ltd.

InventorYeh-Chien Chou

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Abstract

A strap roller contains: a frame, a fixing post, a central shaft, a worm gear, a rotation element, a support rack, a worm, a manual crank, a cap, and a resilient locking spring. The frame includes a first fence and a second fence. The fixing post is defined between the first fence and the second fence. The central shaft is rotatably connected between the first fence and the second fence. The worm gear is fitted on the central shaft. The rotation element is fixed on the central shaft. The support rack is mounted on the frame and is located outside the first fence. The worm includes a first extension portion, a second extension portion, and a tooth portion. The manual crank is connected on the first extension portion. The cap is disposed on the first fence of the frame. The resilient locking spring is mounted on the cap.

Claims9

Dependent claims

A strap roller comprising:

a frame including a first fence and a second fence connected with the first fence so as to define a receiving space, wherein the first fence has a first edge, and the second fence has a second edge;
a fixing post defined between the first fence and the second fence, and an end of the fixing post adjacent to the first edge being fixed with a coupling segment of a flexible strap;
a central shaft being rotatably connected between the first fence and the second fence of the frame and close to the second edge so that a movable segment of the flexible strap is inserted and winded;
a worm gear being fitted on an end of the central shaft and located outside the first fence;
a rotation element being fixed on the other end of the central shaft and located outside the second fence so as to be manually operated to quickly drive the central shaft to rotate;
a support rack being mounted on the frame and located outside the first fence, wherein the support rack includes a first coupling wall and a second coupling wall;
a worm including a first extension portion, a second extension portion, and a tooth portion between the first extension portion and the second extension portion, the first extension portion being fitted on the first coupling wall of the support rack;
and the second extension portion being fitted on the second coupling wall of the support rack;
the worm being limited to move between an engagement position and a disengagement position, wherein when the worm is limited at the engagement position, the tooth portion of the worm is engaged with the worm gear;
and when the worm is limited at the disengagement position, the tooth portion of the worm is disengaged from the worm gear;
wherein the first extension portion has a defining groove defined on an outer wall thereof;
a manual crank being connected on the first extension portion of the worm to drive the worm so that the worm actuates the worm gear and the central shaft to change a length and a tension of the flexible strap;
a cap being disposed on an outer wall of the first fence of the frame to cover the worm gear, the support rack, and the tooth portion of the worm;
and
a resilient locking spring being mounted on the cap so that when the worm is moved to the disengagement position, the resilient locking spring is limited in the defining groove of the worm.

12 more elements

Dependencies are inferred from the claim text.

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Abstract

A strap roller comprising:

a frame including a first fence and a second fence connected with the first fence so as to define a receiving space, wherein the first fence has a first edge, and the second fence has a second edge;
a fixing post defined between the first fence and the second fence, and an end of the fixing post adjacent to the first edge being fixed with a coupling segment of a flexible strap;
a central shaft being rotatably connected between the first fence and the second fence of the frame and close to the second edge so that a movable segment of the flexible strap is inserted and winded;
a worm gear being fitted on an end of the central shaft and located outside the first fence;
a rotation element being fixed on the other end of the central shaft and located outside the second fence so as to be manually operated to quickly drive the central shaft to rotate;
a support rack being mounted on the frame and located outside the first fence, wherein the support rack includes a first coupling wall and a second coupling wall;
a worm including a first extension portion, a second extension portion, and a tooth portion between the first extension portion and the second extension portion, the first extension portion being fitted on the first coupling wall of the support rack;
and the second extension portion being fitted on the second coupling wall of the support rack;
the worm being limited to move between an engagement position and a disengagement position, wherein when the worm is limited at the engagement position, the tooth portion of the worm is engaged with the worm gear;
and when the worm is limited at the disengagement position, the tooth portion of the worm is disengaged from the worm gear;
wherein the first extension portion has a defining groove defined on an outer wall thereof;
a manual crank being connected on the first extension portion of the worm to drive the worm so that the worm actuates the worm gear and the central shaft to change a length and a tension of the flexible strap;
a cap being disposed on an outer wall of the first fence of the frame to cover the worm gear, the support rack, and the tooth portion of the worm;
and
a resilient locking spring being mounted on the cap so that when the worm is moved to the disengagement position, the resilient locking spring is limited in the defining groove of the worm.

12 more elements