JP3036357B2 - Lever device for light vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lever device used for a brake of a light vehicle such as a bicycle, and more particularly, to a shape of a bracket in the lever device.

[0002]

2. Description of the Related Art In general, a lever device for a light vehicle has a lever 1 and a bracket 2 rotatably mounted on a shaft 3 as shown in FIG. 5, and an inner wire end (hereinafter abbreviated as a wire end).
4 is also rotatably attached to the lever 1. When the lever 1 is turned to the handlebar 5, the wire end 4 becomes 4
And the inner wire 6 is pulled.

[0003] However, the wire end 4 has an inner wire 6
In many cases, metal is cast into the end of the cylinder in a cylindrical shape,
Further, since the locus of the wire end 4 has an arc shape about the axis 3, a shear force acts on the inner wire 6, so that the resistance at the time of rotation is large, the tension of the inner wire is reduced, and the inner wire 6 is connected to the wire end 4. However, there were problems such as breakage.

FIG. 6 shows a prior art which solves these problems. In FIG. 6, the lever 11 and the bracket 12 are
At 3, it is rotatably mounted. 14 is a wire end, 15 is a handlebar, and 16 is an inner wire. In the case of this example, the wire end 14 is rotatably fitted to the connection fitting 17, and the connection fitting 17 is rotatably supported by the lever 11 via the fitting shaft 18. However, in this example, if the bicycle is attached to the bicycle as it is, the appearance and safety are not sufficient. Therefore, it is necessary to separately cover the bracket 12 and the connecting bracket 17 with a resin cover, which not only increases the cost but also increases the strength. Because of its weakness, there is a problem that it is often deformed and damaged by an impact when it falls.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to realize a lever device for a light vehicle which has excellent strength, durability, and safety and has a good appearance.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a bracket mounted on a handlebar,
A lever pivotally supported on the bracket by a lever shaft,
An inner wire for transmitting a braking force for braking the wheels,
An outer wire enclosing the inner wire for protecting the inner wire, a metal fitting interposed between an end of the outer wire and the bracket, and a connecting metal fitting for connecting one end of the inner wire to one end of the lever; The bracket has a handlebar mounting surface that is in contact with the handlebar, and a lever insertion surface into which a lever is inserted and fitted. A substantially rectangular parallelepiped shape, the bracket and a part of the lever are housed inside the bracket, and the side opposite to the lever insertion surface.
Lock that the inner wire passes through the bracket surface of
A hole from the locking hole to the lever insertion surface.
Insert a groove with a width wider than the diameter of the inner wire into the bra.
Formed on the surface of the socket and inserted into the slot provided at one end of the lever.
A shaft support portion that rotatably supports one end of the connection bracket is provided,
The groove formed from the locking hole to the lever insertion surface
The part on the side of the lever insertion surface is widened to guide the shaft support.
Guide edge to guide, at least part of the lever operation stroke
The shaft support is configured to be guided and moved by the guide edge .

[0007]

According to the present invention, when the inner end of the inner wire is housed in the connecting fitting and the inner wire is set on the bracket, the lever is tilted down to the handlebar side to open the lever insertion surface which is the opening surface. The wire end is housed in a connection fitting, the inner wire is inserted from the lever insertion surface along the groove to the locking hole of the receiving fitting, and the inner wire is set on the bracket. The bracket has two opening surfaces and four bracket surfaces,
Furthermore, since the connecting fittings and a part of the lever are housed inside, there is no damage to the internal parts due to the impact of the fall, and the bracket itself has four bracket surfaces, so it has high strength and other strength. No reinforcing parts are required.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In this embodiment, a mechanism for adjusting the ratio of input to tension is added to the bracket.

Generally, in the case of the conventional lever device shown in FIG. 5, since the distance from the shaft 3 to the wire end 4 is constant, the ratio of the distance between the wire end 4 with the shaft 3 as a fulcrum and the power point of the lever 1 (hereinafter referred to as lever) Ratio) was constant. However, the angle formed by the line connecting the shaft 3 and the wire end 4 with the wire direction is initially substantially a right angle, decreases with the operation of the lever 1, and becomes the smallest acute angle when the lever 1 comes into contact with the handlebar 5. It changes to become. Therefore, as the lever 1 rotates, the ratio of the tension P of the inner wire 6 to the input F to the lever 1 (hereinafter referred to as a force ratio) gradually increases, and in the latter half, it increases at an accelerating rate. Also lever 1
With the rotation of the lever 1, the wire feed amount (hereinafter referred to as wire feed ratio) with respect to the unit angle change of the lever 1 is initially large and rapidly decreases with the rotation angle of the lever 1.

For this reason, during actual braking, the force ratio becomes too large and braking controllability deteriorates. For example, if the wheels are skid or the lever 1 is rotated until the actual braking force is obtained, the rotation of the lever 1 There have been various problems such as the angle becoming large and the lever 1 easily coming into contact with the handlebar 5.

FIG. 1 and FIG. 2 show the configuration. In this embodiment, in order to connect the inner wire 28 to the connection fitting 29,
Locking hole 51a for passing inner wire 28
The groove 51c is formed on one of the bracket surfaces E, and the guide edge 52 is formed by widening the groove 51c on the lever insertion surface B side. Will also be improved. Perpendicular X
The subsequent edge 53 on the lever shaft 27 side has a curvature on the lever shaft 27 side to avoid interference with rotation .

FIG. 3 is an exploded perspective view of the lever 44. 4
Reference numeral 4b denotes a fitting hole for the lever shaft 27, and reference numeral 44c denotes a long hole for guiding the metal shaft 31 and the rotatable ring 45. The long hole 44c has a long diameter portion on a line connecting the lever shaft 27 and the metal shaft 31. It is provided in. The wall portion 44 having the elongated hole 44c formed therein
a is housed in the space 29 a of the connection fitting 29,
The wheel 45 is housed in the elongated hole 44c at b. The two pulleys 46 on the outside of the wheel 45 are rotatably connected to each other by the bracket shaft 31 together with the two pulleys 46. The center distance between the fitting hole 44b and the long hole 44c is d2 at the short part and d1 at the long part.

FIG. 1 shows a state in which the bracket 51, the lever 44 and its attached parts are assembled. The configuration and operation will be described below.

In FIG. 1, reference numeral 46 denotes a pulley. Two pulleys 46 are arranged so as to sandwich the lever 44 from the left and right, and are in contact with the guide edge 52 of the bracket 51. The wire feed amount C until the lever 44 comes into contact with the handlebar 22 is defined by a perpendicular X passing through the lever shaft 27 and perpendicular to the wire feed direction.
The starting point of the guiding edge 52 to the perpendicular X: the perpendicular X to the point where the lever 44 abuts on the handlebar 22 is divided into 2: 1. The guide edge 52 is parallel to the tension direction of the inner wire,
It is extended to near the vertical line X. In an initial state in which no force is applied to the lever 44, the distance d3 between the lever shaft 27 and the bracket shaft 31 is shorter than d1, and the distance between the straight line in the tension direction of the inner wire 28 and the shaft 27 is determined by the long hole 44c and the lever shaft 27. It is set to d2 which is equal to the short distance between them.

A bracket 51 is attached to the handlebar 22.
The mounting of the fixing bracket 5 which has been conventionally used
4 and bolts 55 and nuts 56 are used.

[0016]

As is apparent from the above description, according to the present invention, the inner wire can be easily fitted since the bracket has a groove for mounting the inner wire despite forming a closed space. In addition, the bracket and part of the lever are housed inside the bracket.Because it is formed by bending the bracket on the surface with grooves, it is not easily deformed by external force even when it falls down Also, it is possible to provide a lever device for a light vehicle in which parts inside the bracket are not damaged.

Also, a part of the connecting fitting and the lever, and furthermore, the fixing fitting and the screw to be fitted thereto can be stored in the bracket, and the appearance can be neatly organized, so that it has an aesthetic effect and requires a new separate part. Therefore, an economic advantage can be obtained.

[0018] In addition to adding the induced edge to adjust the force ratio and the wire feed ratio to the bracket, by partially changing the essential part component characteristic of the bracket as it can also improve the brake operation characteristics as is there.

[Brief description of the drawings]

FIG. 1 is a side view showing a lever device for a light vehicle according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the lever device.

FIG. 3 is an exploded perspective view of main parts of the lever device.

FIG. 4 is an exploded perspective view of main parts of the lever device.

FIG. 5 is a side view showing a conventional lever device for a light vehicle.

FIG. 6 is a side view showing another example of the conventional light vehicle lever device.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-292280 (JP, A) Japanese Utility Model Showa 59-168017 (JP, U) Japanese Utility Model Showa 57-50494 (JP, U) Japanese Utility Model Showa 58- 165320 (JP, U) Japanese Utility Model Showa 59-24693 (JP, U) Japanese Utility Model Showa 58-142191 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62L 3/02

Claims (1)

(57) [Claims] 1. A bracket mounted on a handlebar, a lever pivotally supported on the bracket by a lever shaft, an inner wire driven by the lever,
An outer wire enclosing the inner wire for protecting the inner wire, a metal fitting interposed between an end of the outer wire and the bracket, and a connecting metal fitting for connecting one end of the inner wire to one end of the lever; The bracket has a handlebar mounting surface that is in contact with and attached to the handlebar, and a lever insertion surface into which a lever is inserted and fitted. Two open surfaces are provided, and the other four surfaces are bracket surfaces. A substantially rectangular parallelepiped shape, and a part of the connection fitting and the lever are housed inside the bracket, and the side opposite to the lever insertion surface.
Lock that the inner wire passes through the bracket surface of
A hole from the locking hole to the lever insertion surface.
Insert a groove with a width wider than the diameter of the inner wire into the bra.
Formed on the surface of the socket and inserted into the slot provided at one end of the lever.
A shaft support portion that rotatably supports one end of the connection bracket is provided,
The groove formed from the locking hole to the lever insertion surface
The part on the side of the lever insertion surface is widened to guide the shaft support.
Guide edge to guide, at least part of the lever operation stroke
The shaft support is configured to move while being guided by the guide edge.
A lever device for a light vehicle, wherein the lever device is formed.