JP3189975U - Sensing device fixing device for crank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crank sensitive device fixing device which can be quickly attached and detached, easily repaired, and can be applied to many types of bicycles. A crank sensitive device fixing device includes a main body 10, a fastener 20, and an elastic tool 30. The main body 10 has a sensitive end 11 and a fastening end 12. A sensitive tool 14 can be provided on the sensitive end 11. A screw hole 15 is provided in the axial direction of the fastening end 12. The fastener 20 has a screw shaft 21 having one end that can be screwed into the screw hole 15 and a fixed end 22 at the other end. A taper step 23 is provided between the screw shaft 21 and the fixed end 22. The elastic tool 30 is fitted in the screw shaft 21 and is located between the tapered step 23 and the fastening end 12. [Selection diagram] Fig. 2

Description

  The present invention relates to a sensitive device attached to a bicycle crank for measuring the speed, stepping frequency, rotational speed, or distance of the bicycle, and more particularly, to a sensitive device fixing device for a crank that can be quickly attached and detached. is there.

  In order to measure information such as bicycle speed, stepping frequency, number of revolutions, or distance, the frame is provided with a display and a measuring device, and the crank is provided with a sensitive tool that rotates with the crank. It is common that When the measuring device measures the number of times the sensitive device passes, it can be converted into information such as the speed of the bicycle, the frequency of depression, the number of revolutions, or the distance.

  For example, in the crank sensitivity device disclosed in Patent Document 1, a rotation number measuring unit is provided in the main body of a bicycle, and a magnet base is provided in the crank. By measuring the time and number of times that the magnet base passes through the rotation speed measurement unit, it is possible to obtain the traveling speed, traveling distance and other information of the bicycle.

U.S. Pat. No. 4,636,769

In the case of adopting a system in which the magnet base is fixed to the middle stage of the crank by the band, the magnet base moves due to the vibration caused by the traveling of the bicycle, and the traveling speed, traveling distance and other information of the bicycle cannot be accurately measured. When the magnet base moves due to the vibration of the bicycle, it is necessary to replace the band and newly fix the magnet base to the middle stage of the crank.
Further, when the magnet base is fixed to the middle stage of the crank by the band, there is a problem that the overall appearance is deteriorated and the high-class feeling of the bicycle is impaired.

  The main purpose of the present invention is applied to bicycle cranks with pedals, quick attachment and detachment, easy repair, can be applied to many types of bicycles, and improve the overall appearance. It is an object of the present invention to provide a crank sensitivity device fixing device.

The crank sensitive device fixing device of the present invention includes a main body, a fastener, and an elastic device. The main body has a sensitive end and a fastening end. A sensitive tool can be provided at the sensitive end. A screw hole is provided in the axial direction of the fastening end.
One end of the fastener is a screw shaft that can be screwed into the screw hole, and the other end is a fixed end. A taper step is provided between the screw shaft and the fixed end.
The elastic tool is fitted in the screw shaft and is located between the taper step and the fastening end.

  According to the crank sensitive device fixing device of the present invention, the diameter of the taper step gradually increases from the screw shaft to the fixed end.

  According to the crank sensitive device fixing device of the present invention, the cross-sectional shape of the fixed end is a polygon.

  According to the crank sensitive device fixing device of the present invention, the elastic device is a ring having elasticity.

  According to the crank sensitivity fixing device of the present invention, at least a pair of mutually parallel operation surfaces are provided on both sides of the main body.

The crank sensitive device fixing device according to the present invention has the following effects.
(1) The present invention is applied to a bicycle crank having a pedal, and the rotation axis of the pedal is provided at the end of the crank, and the tool hole is provided at the end of the rotation axis. When the fixed end and the elastic tool of the fastener are inserted into the tool hole, the fixed end becomes non-rotatable by engaging with the tool hole. Further, when the main body is rotated, the distance between the taper step and the fastening end changes, and the elastic tool is compressed by the taper step to expand its diameter and is fixed inside the tool hole.

  (2) Since it is possible to adjust the radial dimension of the elastic tool by using the combination of the elastic tool and the taper step, the attachment and removal becomes quick and the repair becomes easy, and it is applicable to many types of bicycles. It is possible to improve the overall appearance.

It is a perspective view which shows the assembled state of the sensitive tool fixing device for cranks by 1st Embodiment of this invention. It is a disassembled perspective view which shows the sensitive tool fixing device for cranks by 1st Embodiment of this invention. It is a schematic diagram which shows the use condition of the sensitive tool fixing device for cranks by 1st Embodiment of this invention. It is typical sectional drawing which shows the attachment operation | movement of the sensitive tool fixing device for cranks by 1st Embodiment of this invention. It is typical sectional drawing which shows the attachment operation | movement of the sensitive tool fixing device for cranks by 1st Embodiment of this invention. It is a disassembled perspective view which shows the sensitive tool fixing device for cranks by 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
A crank sensitivity fixing device according to a first embodiment of the present invention is shown in FIGS. For ease of explanation, the parts in the drawings are not drawn in proportion, dimensions, deformation or displacement in proportion to the actual parts. Similar parts are given the same reference numerals.

The crank sensitive tool fixing device according to the present embodiment includes a main body 10, a fastener 20, and an elastic tool 30.
The main body 10 has a sensitive end 11 at one end and a fastening end 12 at the other end. The sensitive end 11 is provided with a fitting space 13 for providing a sensitive tool 14. The sensitive tool 14 has the same effect as a magnet or a magnet. A screw hole 15 is provided in the axial direction of the fastening end 12. At least a pair of mutually parallel operation surfaces 16 are provided on both sides of the peripheral wall of the main body 10.

  One end of the fastener 20 is a screw shaft 21 that can be screwed into the screw hole 15, and the other end is a fixed end 22. The cross-sectional shape of the fixed end 22 is a polygon. For example, the cross-sectional shape of the fixed end 22 may be a hexagon. A taper step 23 is provided between the screw shaft 21 and the fixed end 22. The diameter of the taper step 23 gradually increases from the screw shaft 21 to the fixed end 22.

  The elastic tool 30 is fitted into the screw shaft 21 and is located between the taper step 23 and the fastening end 12. The elastic tool 30 is an elastic ring (for example, an O-ring or a resin or rubber ring).

  Next, the principle of operation of this embodiment will be described. Please refer to FIG. The crank sensitive tool fixing device of the present embodiment is applied to a bicycle crank 100, and a screw hole 101 is provided at the end of the bicycle crank 100. A rotation axis 103 of the pedal 102 is connected to the screw hole 101. A tool hole 104 is provided at the end of the rotation axis 103. The tool hole 104 is generally a hexagonal hole. As a result, it is possible to detach the rotational axis 103 of the pedal 102 from the screw hole 101 with a tool such as a spanner.

  Please refer to FIG. Since the fixed end 22 of the fastener 20 is designed to match the shape of the tool hole 104, when the fixed end 22 is inserted into the tool hole 104, the wall surface of the tool hole 104 fits the fixed end 22 tightly. 22 becomes non-rotatable. When the main body 10 is directly rotated by hand, or when the main body 10 is rotated with the operation surface 16 sandwiched by a tool such as a spanner, the distance between the taper step 23 and the fastening end 12 is reduced, and the elastic tool 30 is tapered. The diameter is increased by being pressed by the step 23, and is pressed by the wall surface of the tool hole 104 and fixed inside the tool hole 104 as shown in FIG. 5.

  Conversely, when it is desired to remove the crank sensitivity fixing device of the present invention, if the main body 10 is reversed, the distance between the taper step 23 and the fastening end 12 increases, and the elastic tool 30 is reduced in diameter by its own elasticity. , Away from the wall surface of the tool hole 104. Thereby, it is possible to easily remove the crank sensitive tool fixing device of the present embodiment.

(Second Embodiment)
A crank sensitivity fixing device according to a second embodiment of the present invention will be described with reference to FIG. The elastic tool 30 ′ is a C-ring, and can achieve the same effect as the elastic tool 30 of the first embodiment.

  Thus, while the present invention has been described with reference to specific examples, these examples are for illustrative purposes only and are not intended to limit the present invention, and have ordinary knowledge in the art. It will be understood that modifications, additions, or deletions may be made to the embodiments disclosed herein without departing from the scope of the present invention and the scope of the utility model registration request.

  The present invention can be applied to a bicycle.

DESCRIPTION OF SYMBOLS 10: Main body 11: Sensing end 12: Fastening end 13: Fitting space 14: Sensing tool 15: Screw hole 16: Operation surface 20: Fastening tool 21: Screw shaft 22: Fixed end 23: Taper step 30, 30 ': Elasticity Tool 100: Bicycle crank 101: Screw hole 103: Center of rotation 104: Tool hole

Claims (5)

A sensing end and a fastening end, a sensing tool can be provided on the sensing end, and a main body provided with a screw hole in the axial direction of the fastening end;
One end is a screw shaft that can be screwed into the screw hole, the other end is a fixed end, and a fastener provided with a taper step between the screw shaft and the fixed end,
An elastic tool that is fitted into the screw shaft and is located between the taper step and the fastening end;
A device for fixing a sensitive device for a crank, comprising:   The diameter of the taper step is gradually increased from the screw shaft to the fixed end.   2. The crank sensitive device fixing device according to claim 1, wherein a cross-sectional shape of the fixed end is a polygon.   The crank sensitive tool fixing device according to claim 1, wherein the elastic tool is a ring having elasticity.   The crank sensitive tool fixing device according to claim 1, wherein at least a pair of mutually parallel operation surfaces are provided on both sides of the main body.

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