JP3026992U - High efficiency oar - Google Patents

Abstract

(57) [Summary] [Purpose] An oar that can efficiently row an oar with less force and allows a boat to be released faster. [Structure] An asymmetric blade (2) is connected to an upper edge of the tip of the shaft (1), and a water pressure center (4) and a pivot (5) of the asymmetric blade are provided at the root of the shaft (1).
An offset handle (3), which is offset so that the grip (6) is located on the extension line of and, is connected. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a rowing oar used for competition rowing.

[0002]

[Prior art]

 In conventional oars, the blades are attached on the extension line of the shaft axis.Therefore, when the oars are rowed, the shafts are submerged and the shaft receives water resistance. Since the shaft is disturbed, it was not possible to row water efficiently. To compensate for this drawback, if the blade is installed offset to the shaft downwards, the point of action of the water force (water pressure center) that the blade receives at the time of rowing is not aligned with the shaft axis, so the aur I turned around and couldn't row well.

[0003]

[Problems to be solved by the device]

 This proposal aims to develop an oar that can efficiently row water, excluding the above drawbacks.

[0004]

[Means for Solving Problems]

 Now, the solution means will be described with reference to the drawings. The tip of the shaft (1) is connected to the shaft at the upper edge of the asymmetric blade (2) so as to offset downward with respect to the shaft axis (7). Attach an offset handle (3) that is offset upward so that the grip (6) is located on the extension of the water pressure center (4) and the pivot (5) at the base of the shaft.

[0005]

[Action]

 Since this plan has the structure as described above, just by gripping and gripping the grip part and rowing, the shaft does not get submerged and the oar rotates on the shaft (7) in the same way as when using a normal oar. You can row without losing.

[0006]

【Example】

 Examples will be described with reference to the drawings. In FIG. 1, the pipe is mainly made of reinforced plastic, and the asymmetric blade (2) is made of wood or reinforced plastic. Further, the offset handle (3) is made of metal such as aluminum or reinforced plastic, and has a grip portion (6) to be gripped by hand at its tip.

The asymmetric blade (2) has an optimum curvature that matches the flow of water when rowing, except for a small area of the upper edge. Further, the offset handle (3) is located between the base of the shaft (1) and the grip so that the grip (6) is located on the extension line connecting the water pressure center (4) of the asymmetric blade (2) and the pivot (5). It is shaped to connect to each other.

The asymmetric blade (2) and the offset handle (3) are respectively provided on the shaft (1) so that the hydraulic center (4) and the grip portion (6) of the asymmetric blade are straight through the pivot (5). It is connected to the

[0009]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

By moving the shaft to the upper edge of the asymmetric blade, it is possible to make the blade shape optimal for the flow of water that is not blocked by the shaft, and because the shaft does not submerge when rowing, the shaft is Not subject to water resistance. In addition, the offset handle allows you to row like a normal oar.

With the above advantages, the oar can be efficiently rowed with a small force, and the boat can be run faster.

[0012]

[Brief description of drawings]

FIG. 1 is an overall view of a main part of a high efficiency oar.

FIG. 2 is an overall view of a main part of a conventional oar.

FIG. 3 is an overall view of a main part in which a high efficiency oar is attached to a rowing boat.

[Explanation of symbols]

 1 Shaft 2 Asymmetric Blade 3 Offset Handle 4 Water Pressure Center 5 Pivot 6 Grip 7 Shaft Axis 8 Water Surface 9 Hull

Claims (1)

[Scope of utility model registration request] 1. An asymmetric blade (2) attached to the tip of a linear shaft (1) with a downward offset with respect to the shaft axis (7), and an offset handle (a offset blade attached with an upward offset in the same manner). A rowing oar consisting of 3).