JPH10109834A - Reel installed power spring in drum side face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide sufficient power spring performance by installing a spring case for housing a power spring in a drum side face so as to prevent a spring case diameter from being limited by a drum inner diameter and thereby form a large spring case diameter without increasing a drum. SOLUTION: A spring case 2 housing power spring 3 is attached to the side face of a drum 1 to rotate the drum 1 and the spring case 2 together. The power spring 3, is connected its outer peripheral parts to the spring case 2 and is connected its center part to a shaft 4 supported by stand 5 to be freely rotated. In a reel having such a construction, when a cable 6 is pulled out, the drum 1 is rotated and the power springs 3 are wound (force accumulation). Thus, on winding the cable 6, by reducing a drawing force for the cable 6, the drum 1 is rotated by the resistance force of the power springs 3 and then the cable 6 is smoothly wound in the outer periphery of the drum 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel for winding a cable, a hose, a wire or the like (hereinafter referred to as a cable for convenience).

[0002]

2. Description of the Related Art Some conventional reels use a mainspring to wind up a cable.

[0003]

As shown in FIG. 2, in a conventional reel using a mainspring, since the mainspring is installed inside the drum, the diameter of a spring case in which the mainspring is placed is larger than the inner diameter of the drum. Can not do it. It is necessary to increase the diameter of the spring case in order to fully exhibit the performance of the mainspring. However, when the diameter of the spring case is increased, the inner diameter of the drum increases, and the entire drum increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reel in which the diameter of a spring case is increased without increasing the size of a drum and the performance of a mainspring can be sufficiently exhibited.

[0005]

In order to achieve the above object, according to the present invention, a spring case for accommodating a mainspring is installed on the side of the drum.

As shown in FIG. 1, by installing a spring case containing a mainspring on the side of the drum, the diameter of the spring case can be increased without being limited to the inner diameter of the drum.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. As shown in FIG. 1, a spring case 2 containing a mainspring 1 is attached to the side of a drum 3 so that the drum and the spring case can rotate together. The central part of the mainspring is connected to the axis and the outer part is connected to the spring case. The shaft is fixed to the stand. When the cable is pulled out, the drum rotates and the mainspring is tightened. When winding the cable, the cable is wound around the drum by the repulsive force of the mainspring.

[0008]

According to the reel of the present invention, since the diameter of the spring case is not limited to the inner diameter of the drum, the diameter of the spring case can be increased without increasing the size of the drum, so that the performance of the mainspring can be sufficiently brought out.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a reel according to the present invention (a partial cross-sectional view of a mainspring).

FIG. 2 is a perspective view showing a conventional reel (a partial cross-sectional view of a mainspring).

[Explanation of symbols]

 Reference Signs List 1 drum 2 spring case 3 mainspring 4 shaft 5 stand 6 cable

Claims (1)

[Claims] 1. A reel in which a mainspring is installed on a side surface of a drum.