JP2008012939A - Blind lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid for an upper part of a steering tube opening of a front fork for a bicycle. <P>SOLUTION: A locking unit 3a has a shape engaging with a hole shape 18a, oscillates around a shaft pin 7a (8a), and is equipped with a finger hook part 5a (6a) on one side, a locking pawl 9a (10a) on the other side, and a spring which engages in the direction where the locking pawl 9a (10a) is engaged with a locking shape 4a. The locking unit 3a is equipped with a locking piece 1a (2a) where an engagement with the locking shape 4a is released by pushing the finger hook 5a (6a). A bolt 16a having a male screw part 17a passing through a through-hole 13a has a hexagonal tool hole at the head part, the head part is connected to a disc shape part 12, and screwed with a female screw part 15a provided on a star nut type fixing part 14a previously press-fitted in a steering tube 70. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a steering tube opening upper lid of a bicycle front fork.

  In a bicycle handle stem, a handle stem post is fixed to the inner wall of the steering tube as in Patent Document 1, and a handle stem is fixed to the outer wall of the steering tube as in Patent Document 2. There are some that fix the clamp part.

  The handle stem fixing method, such as Patent Document 2, which started with mountain bikes about a dozen years ago, has become the mainstream in road racing bicycles. The reason is that the steering tube has been streamlined due to the necessity of adjusting the bearing provided on the head tube that rotatably supports the steering tube, which eliminates the need for the screw thread to be cut in the steering tube. can give. Here, the adjustment of the bearing is mainly performed by adjusting the pressure of the lid for opening the steering tube opening of the bicycle front fork via the clamp portion of the handle stem.

  In addition, an idea related to an idea of embedding a speedometer in a handle stem as in Patent Document 1 and an idea of installing an accessory case near the handle stem as in Patent Document 3 have been announced.

Japanese Patent Laid-Open No. 2004-249885 JP 2005-088880 A Noto 3077762 gazette

  With the change in the steering wheel stem fixing method, it is considered that the idea of using the space created inside the steering tube effectively is the idea as in Patent Document 2, but steering in the past few years especially for road racing bicycles. The tube is made of carbon fiber, and a reinforcing device designed to be fixed while expanding the inner wall of the steering tube is used to counter the compression pressure of the steering tube by the clamp part of the handle stem. Increasing cases. For this reason, since the play space inside the steering tube has decreased again, it is considered that the demand for ideas as in Patent Document 2 is decreasing.

  In addition, the use of aluminum and carbon fiber has made it thinner and lighter, and there is no space to install speedometers etc. on bicycles with organic modeling, so find new installation spaces and rational installation methods. There is a need.

Embodiments of the present invention will be described below with reference to the drawings. However, this is intended to make the contents of the present invention easier to understand, and does not reduce the scope of the appended claims.
Moreover, although the code | symbol described in each figure is comprised only with the number or the number and the small letter of the alphabet, that the number is the same represents that it is a part corresponding to each other. Therefore, the reference numeral only includes a reference numeral that is the same and includes a numeral and a lower case letter.

The lid for the steering tube opening upper part of the bicycle front fork according to the first aspect of the present invention is, for example, as shown in FIGS.
It is fixed to the fixing portion 14 provided in the upper opening of the steering tube 70 of the bicycle front fork 60,
A disk-shaped part 12 larger than the inner periphery of the upper part of the opening;
The locking shape 4 is formed on the exposed portion of the disk-shaped portion 12 exposed to the outside of the steering tube 70 when fixed to the fixing portion 14;
Comprising
It is a lid for the steering tube opening upper part of the bicycle front fork.

The steering tube opening upper cover of the bicycle front fork according to the second aspect of the invention is the steering tube opening upper cover of the bicycle front fork according to the first aspect of the invention, as shown in FIGS.
The locking shape 4 is
An outer peripheral flange provided along the outer periphery of the disk-shaped part 12,
An inner peripheral groove provided in a hole shape 18 smaller than the outer periphery of the disk-shaped part 12 provided in the disk-shaped part 12;
At least one of the
It is a lid for the steering tube opening upper part of the bicycle front fork.

A steering tube opening upper cover of a bicycle front fork according to a third aspect of the present invention is the steering tube opening upper cover of the bicycle front fork according to any one of the first to second aspects of the invention. For example, as shown in FIGS.
The disk-shaped part 12 is larger than the outer periphery of the upper part of the opening,
The disk-shaped part 12 has a through hole 13 in the center,
The handlebar stem connected to the outer wall of the steering tube 70 by screwing the male threaded portion 17 of the bolt 16 connected to the disk-shaped portion 12 and penetrating the through hole 13 into the female threaded portion 15 provided in the fixed portion 14. 54 can be pressed directly or indirectly via a ring-shaped member 51 into which a steering tube 70 is inserted between the disc-like portion 12 and the handle stem 54.
It is a lid for the steering tube opening upper part of the bicycle front fork.

A steering tube opening upper cover of a bicycle front fork according to a fourth aspect of the present invention is the steering tube opening upper cover of the bicycle front fork according to any of the first to third aspects of the invention, as shown in FIGS.
It has a locking claw 9 (10) that engages with the locking shape 4,
The locking claw 9 (10) includes a locking unit 3 that is locked on the disk-shaped portion 12 by engaging with the locking shape 4.
It is a lid for the steering tube opening upper part of the bicycle front fork.

  As described above, in the present invention, the shape of the disk-shaped portion of the steering tube opening upper cover of the conventional bicycle front fork is maintained while sufficiently maintaining the role of the upper steering tube opening cover of the original bicycle front fork. It is possible to obtain a reasonable locking shape by utilizing it effectively. The portion provided with the locking shape obtained here is not easily influenced by the shape evolution of future bicycles, particularly the frame and the handlebar, and can be used stably in the future.

Furthermore, according to the invention 2, the locking shape can be easily obtained by lathe processing.
In addition, the lid for the upper part of the steering tube opening of the bicycle front fork is not uncomfortable.
In addition, the locking shape is rational and durable.

  Furthermore, according to the invention 3, the steering tube opening upper cover of the bicycle front fork can be used for adjusting a bearing provided on the head tube that rotatably supports the steering tube.

  Furthermore, according to the invention 4, it is possible to attach the locking unit without using a tool or the like.

[First Embodiment]
1 to 3, the disk-shaped portion 12a is made of lathe processed aluminum, but may be made of fiber reinforced resin by injection molding.
The disc-shaped portion 12a includes an outer peripheral flange that is the locking shape 4a along the outer periphery, a hole shape 18a inside the locking shape 4a, and a through hole 13a that extends along the central axis 50 of the steering tube 70. Is provided.

  The locking unit 3a is any one of a speedometer, a watch, a portable information terminal, an accessory case, a coin purse, a headlamp, a lock, and a spray bottle.

  In the case of the speedometer, a configuration in which a liquid crystal display device, an operation switch, and the like are provided on the flat surface 11a of the locking unit 3a and a button battery is provided on the bottom surface, and a reset switch can be considered.

  In the case of a timepiece, it is conceivable to use a circular shape of the flat surface 11a and display with segments arranged radially so as to replace the second hand on the outer peripheral portion of the circular liquid crystal display panel.

  In the case of a portable information terminal, it is possible to display weather forecast data or the like transmitted from a base station by radio, a simple GPS function, or the like.

  In the case of an accessory case, it is conceivable that a screw-type or hinge-type lid is provided on the flat surface 11a, and a portable tool, a puncture repair set, a tablet, a key, etc. are stored in a space provided inside the locking unit 3a. . For example, when the length of the key becomes a problem, the locking unit 3a may be provided with a notch that exposes the part other than the finger hooking part of the key to the outside of the locking unit 3a.

  In the case of coin purses, a screw-type or hinge-type lid may be provided on the flat surface 11a, and coins may be inserted into a space provided inside the locking unit 3a. If the number of coins is small and you are worried about the internal rattling sound, you can place an elastic body on the back of the lid to hold down the coins. Further, a structure in which a notch is provided in the side wall of the change storage space of the locking unit 3a so that the stored change can be easily taken, and a finger is put into the notch and the change is rubbed is considered. It is also conceivable to use this notch to store the finger rest of the key simultaneously with the change.

  In the case of a headlamp, a hemispherical reflector or lens for providing directionality in the traveling direction of the bicycle is provided on the plane 11, and a light source such as an LED, an organic EL, or a light bulb may be provided therein. As a power source, a built-in battery can be considered, but a method in which a power pack is separately attached to a bicycle frame or the like and connected to a light source with an electric wire can be considered.

  In the case of a lock, it is conceivable that a winding portion of a winding-type wire lock is provided on the flat surface 11.

  In the case of spraying, it is conceivable that water contained in a bottle installed on the bicycle frame is sent to the locking unit 3a by a vinyl hose and sprayed by a pressure switch and a fog generating nozzle provided on the flat surface 11a. It is also conceivable that a water tank or a perfume tank is provided in the locking unit 3a without requiring a vinyl hose or a bottle.

  The locking unit 3a has a shape that engages with the hole shape 18a, and swings around the shaft pin 7a (8a). The finger hook 5a (6a) on one side and the locking claw 9a (10a) on the other side. ), A spring that urges the locking claw 9a (10a) in a direction to engage with the locking shape 4a, and the engagement with the locking shape 4a is released by pressing the finger hooking portion 5a (6a). Stop piece 1a (2a).

  The bolt 16a having the male threaded portion 17a penetrating the through hole 13a has a hexagonal tool hole in the head, and the head is connected to the disk-shaped portion 12a and is pre-pressed into the steering tube 70. It is screwed into a female screw portion 15a provided on the nut-type fixing portion 14a.

  Further, as shown in FIG. 4, the locking unit 3 a is restricted from freely rotating around the central axis 50 by the batted shape 19 b where the locking claw 9 a (10 a) engaged with the locking shape 4 b hits. Various embodiments are also conceivable.

  The adjustment method and structure of the bearing provided in the head tube 57 are obvious to those skilled in the art and will not be described.

[Second Embodiment]
5 to 7, the disk-shaped part 12c is made of lathe-processed aluminum, but may be made of fiber-reinforced resin by injection molding.
Further, the disk-shaped portion 12c is provided with a hole shape 18c on the inner side, an inner peripheral groove which is a locking shape 4c on the inner periphery of the hole shape 18c, and a through hole 13c along the central axis 50 of the steering tube 70. It has been.

The locking unit 3c is any one of a speedometer, a watch, a portable information terminal, an accessory case, a coin purse, a headlamp, a lock, and a spray bottle.
Here, the description of each locking unit 3c is the same as that of the first embodiment, and will be omitted.

Further, the locking unit 3c is linearly moved along the guide hole 21c (22c), and is locked to be engageable with the finger hook portion 5c (6c) exposed from the side wall of the locking unit 3c and the locking shape 4c. A claw 9c (10c) and a spring 20c that urges the locking claw 9c (10c) in a direction to engage with the locking shape 4c are provided, and the finger hooking portion 5c (6c) is pressed to engage with the locking shape 4c. And a locking piece 1c (2c) to be uncoupled.
Further, the locking piece 1c, the locking piece 2c, and the spring 20c are integrally formed of polyethylene.

  A bolt 16c having a male threaded portion 17c that passes through the through hole 13c has a hexagonal tool hole in the head, the head is connected to the disk-shaped portion 12c, and is a star nut press-fitted into the steering tube in advance. It is screwed into a female screw portion 15c provided on the fixed portion 14c of the type.

  Further, as shown in FIG. 8, the locking unit 3 c is restricted from freely rotating around the central axis 50 by the hitting shape 19 d that the locking claw 9 c (10 c) engaged with the locking shape 4 d hits. Various embodiments are also conceivable.

  The adjustment method and structure of the bearing provided in the head tube 57 are obvious to those skilled in the art and will not be described.

A view of the vicinity of the head tube 57 of the bicycle equipped with the first embodiment as seen from the rear of the bicycle. FIG. 1 is a broken sectional view showing the vicinity of the handle stem 54 in FIG. The perspective view of the disk-shaped part 12a of 1st Embodiment The perspective view of the disk-shaped part 12b which is another plan of the disk-shaped part 12a of 1st Embodiment. Broken sectional view of the vicinity of the handle stem 54 of the bicycle equipped with the second embodiment as seen from the rear of the bicycle Bottom view of the locking unit 3c of the second embodiment The perspective view of the disk-shaped part 12c of 2nd Embodiment The perspective view of the disk-shaped part 12d which is another plan of the disk-shaped part 12c of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Locking piece 3 Locking unit 4 Locking shape 5,6 Finger hook part 7,8 Shaft pin 9,10 Locking claw 11 Plane 12 Disc-shaped part 13 Through hole 14 Fixing part 15 Female thread part 16 Bolt 17 Male thread 18 Hole 19 Shape 20 Spring 21 22 Guide hole 50 Center axis 51, 52, 53 Ring member 54 Handle stem 55 Handle clamp 56 Handle bar 57 Head tube 58 Top tube 59 Bottom tube 60 Front fork 61 Brake caliper fixing nut 62 Split taper washer 63, 66 Bearing cone 64, 65 Bearing cup 67 Steering tube clamp bolt 68 Steering tube clamp bolt engaging part 69 Steering tube clamp bolt screwing part 70 Steering tube 71 Split

Claims (4)

It is fixed to the fixed part provided in the steering tube opening upper part of the bicycle front fork,
A disk-shaped part larger than the inner periphery of the upper part of the opening;
A locking shape on the exposed portion of the disc-shaped portion exposed to the outside of the steering tube when fixed to the fixing portion,
Comprising
Cover for opening the steering tube opening of the bicycle front fork. The locking shape is
An outer peripheral flange provided along the outer periphery of the disk-shaped part,
An inner peripheral groove provided in a hole shape smaller than the outer periphery of the disk-shaped part provided in the disk-shaped part,
At least one of the
The lid for the steering tube opening upper part of the bicycle front fork according to claim 1. The disk-shaped part is larger than the outer periphery of the upper part of the opening,
The disk-shaped part has a through hole in the center,
A male screw part of a bolt connected to the disk-like part and passing through the through hole is screwed into a female screw part provided in the fixing part, so that the handle stem connected to the outer wall of the steering tube is directly connected. Or indirectly via a ring-shaped member into which the steering tube is inserted between the disk-shaped portion and the handle stem.
The steering tube opening upper cover of the bicycle front fork according to claim 1. A locking claw that engages with the locking shape;
The locking claw includes a locking unit that is locked onto the disk-shaped portion by engaging with the locking shape.
The steering tube opening upper cover of the bicycle front fork according to any one of claims 1 to 3.

Images