JPS6213911Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a gear shift operating device mainly used for bicycles. Specifically, an operating lever is rotatably supported on a fixed member having a lever shaft, and movement due to rotation of the lever is controlled via an operating wire. is transmitted to the transmission,
The present invention relates to a gear shift operating device for switching to a predetermined gear position.

Conventionally, this type of speed change operating device has a plurality of concave engaging portions between an operating lever and a fixed member that supports the lever, and a locking body such as a ball that engages with one of the engaging portions. and a plate spring that presses the locking body against the engagement portion, and at the same time determines a gear position by engagement of the locking body with the engagement portion, and simultaneously determines a gear position corresponding to the gear position. There is a known device in which the lever is stopped at a position where the lever is stopped.

However, when using the positioning mechanism as described above,
Although the operating lever can be positioned accurately and the gear shifting operation can be performed accurately, if the operating wire stretches due to repeated gear shifting operations, the movement of the movable parts in the transmission will become erroneous, even if the operating lever is operated accurately. This makes it impossible to perform accurate gear shifting operations.

Therefore, conventionally, when using an outer tube for guiding the operating wire, the fixed member in the transmission is
One end has a bowl-shaped receiving part that receives the end of the outer cylinder, and a hollow adjusting bolt with a through hole in the center is screwed into the bolt.By rotating this bolt, the amount of elongation can be absorbed and corrected. In addition, when using a so-called bare type wire that does not use an outer tube, the amount of elongation is absorbed and corrected by rotating a fixture that fixes the operating wire to a movable member in the transmission. There is.

However, in either case, since the absorption correcting means is located on the transmission side, there is a problem that the absorption correcting means cannot be operated during the gear shifting operation, and it is also difficult to perform the absorption correcting operation. .

The present invention was devised in view of the above-mentioned conventional problems, and the purpose is to be able to absorb and correct the amount of elongation of the operating wire in the posture during gear shifting operation, and to perform the absorption and correction operation by controlling the operating lever. The object of the present invention is to provide a speed change operation device that can be operated simply by rotating the gear by a predetermined amount or more.

Therefore, the present invention provides a positioning mechanism between the positioning body and the lever by rotatably supporting a positioning body on a fixed member under rotational resistance greater than rotational resistance of the lever; The positioning body is characterized in that an engaging means is provided on the positioning body to cause the lever to rotate together with the lever at a rotation angle greater than or equal to a predetermined rotation angle with respect to the positioning body.

Embodiments of the device of the present invention will be described below based on the drawings.

In the figure, 1 is a fixing member consisting of a cylindrical lever shaft 11 with a screw hole 11a in the center and a support plate 12 that supports the lever shaft 11, and 2 is a fixing member consisting of the lever shaft 11 of this fixing member 1. The lever shaft 11 of the fixed member 1 has a flat surface 11b on its outer peripheral surface.
Further, an annular projection 11c is provided at one end in the axial direction, and the support plate 12 is provided with the lever shaft 1.
A non-circular through hole 12a is provided through which the lever shaft 11 is inserted, and the lever shaft 11 is supported in a non-rotatable manner in the through hole 12a. For example, it is fixed to the top tube of a bicycle frame.

The lever shaft 11 and the support plate 12 may be formed integrally, or the support plate 12 may be omitted and the lever shaft 11 may be formed integrally with the band member. Its structure is not particularly limited.

In addition, the lever 2 has a boss portion 2a centered on the lever 2.
A shaft hole 21 having a larger diameter than the lever shaft 11 is provided. Further, this lever 2 is prevented from falling off from the lever shaft 11 by a tightening screw 3 that is screwed into the threaded hole 11a of the lever shaft 11.

As described above, a cylindrical sleeve 4 having an annular protrusion 41 at one end is supported non-rotatably on the outer circumferential surface of the lever shaft 11 of the fixed member 1 supporting the operating lever 2, and the outer circumferential surface of the sleeve 4 is A cylindrical positioning body 5 is rotatably supported, and a rotary plate 6 and a washer 7, which rotate integrally with the lever 2, are provided between one end surface of the positioning body 5 and the support plate 12 of the fixed member 1. and spacer 8 to the support plate 12.
At the same time, a washer 10 is interposed between the other end surface of the positioning body 5 and the annular protrusion 41 of the sleeve 4, and the tightening force of the tightening screw 3 is applied to the sleeve 4 and the positioning body. body 5 and rotating plate 6
to apply a rotational resistance to the positioning body 5 that is greater than the rotational resistance of the operating lever 2 that rotates integrally with the rotary plate 6.
A positioning mechanism 9 is provided between the lever 2 and the lever 2, and an engaging means 50 is provided on the positioning body 5 to rotate the lever 2 together with the lever 2 at a rotation angle of at least a predetermined rotation angle with respect to the positioning body 5. .

In the above structure, the lever 2 is provided with a lumen 22 on one side of the boss 2a, a recess 23 on the inner peripheral surface of the lumen 22, and a shaft from the one side of the boss 2a. An engaging protrusion 24 is provided that projects outward in the direction, and a recess 25 is provided on the other side of the boss portion 2a.

Further, the positioning body 5 includes a small diameter cylindrical portion 51 that fits into the shaft hole 21 of the lever 2, and a large diameter cylindrical portion 52 that fits into the inner cavity 22 of the lever 2,
The positioning mechanism 9 is provided between the outer peripheral surface of the large diameter cylindrical portion 52 and the inner peripheral surface of the inner cavity 22 of the lever 2,
Further, the engaging means 50 is provided at the end edge of the large diameter cylindrical portion 52.

The engaging means 50 is formed by a contact capable of engaging with the engaging protrusion 24 of the lever 2, and the engaging means 50 is formed by a contact capable of engaging with the engaging protrusion 24 of the lever 2, so that the engaging means 50 is engaged with the lever 2 in the final position in the operating wire pulling direction (arrow x direction in FIGS. 1 and 3). The annular projection 53 is disposed forward in the traction direction from the position of the projection 24, and in the drawing, a part of the annular projection 53 protruding outward from the end edge of the large diameter cylindrical portion 52 is cut out in an arc shape. Although it is formed by a surface, it may be formed by protruding abutments, and the point is that when the lever 2 is rotated at a predetermined rotation angle or more with respect to the positioning body 5, the positioning body 5 is rotated together with the operating lever 2. It is sufficient if the structure is such that it can be rotated.

Further, the rotary plate 6 and the washer 7 are supported so as to be relatively rotatable with respect to the lever shaft 11, and the rotary plate 6 has a protrusion 6 that engages with the recess 25 of the lever 2.
1 is provided in a protruding manner, and when the protruding piece 61 engages with the recess 25, the rotary plate 6 is rotated integrally with the operating lever 2.
is supported non-rotatably relative to the lever shaft 11, and the positioning body 5 is mounted on one side of the spacer 8.
The end faces of the small diameter cylindrical portion 51 are brought into contact with each other to provide resistance to the rotation of the positioning body 5. Incidentally, the inner peripheral surface of the spacer 8 is provided with a flat surface that engages with the flat surface 11b of the lever shaft 11 to prevent relative rotation.

Then, the rotational resistance F ₁ +F 2 of the positioning body 5, which is the sum of the contact resistance F 1 between the positioning body 5 and the sleeve 4 and the contact resistance F ₂ between the positioning body 5 and the spacer 8, is determined by the rotational resistance F ₁ +F ₂ of the positioning body 5. and the contact resistance F ₃ between the rotary plate 6 and the rotary plate 6
and the contact resistance F ₄ between the rotary plate 6 and the support plate 12, which is greater than the rotational resistance F ₃ +F ₄ of the operating lever 2, and normally only the operating lever 2 is operated without rotating the positioning body 5. When the lever 2 is rotated within a rotational angle range corresponding to the number of gears to absorb and correct the elongation of the operating wire W, one end of which is hooked to the lever 2, the lever 2 is rotated within the rotational resistance F ₁ +F of the positioning body 5. ₂ , it is made to rotate together with the positioning body 5.

Further, the positioning mechanism 9 includes a plurality of engaging portions 9.
1... and a locking body 9 that engages with one of the engaging portions 91.
2, the engaging portion 91 is provided on the outer circumferential surface of the large diameter cylindrical portion 52 of the positioning body 5 in accordance with the amount of movement corresponding to the gear position, and the locking body 92 is provided with:
An arc-shaped elastic portion 92a having elasticity and the elastic portion 9
It is formed by a locking part 92b protruding from the top of the lever 2a and is supported in the recessed part 23 provided in the inner cavity 22 of the lever 2. At the same time, the lever 2 is stopped at a position corresponding to the gear position. Note that a gap d is provided between the locking body 92 and the recessed portion 23 that supports the locking body 92 to allow relative movement of the locking body 92. The wire W
This is to absorb the effective length relative to the outer tube (not shown) that guides the wire, and is unnecessary when using a bare wire.

The engagement portion 91 and the locking body 92 are not particularly limited in their arrangement positions as long as they are between the positioning body 5 and the lever 2.
The engaging portion 91 may be provided on the positioning body 5 and the operating lever 2. Further, in addition to providing elasticity to the locking body 92, the engaging portion 91 may be formed of an elastic plate to have elasticity, or the locking body 92 may be made to have elasticity.
The locking body 92 may be formed of a rolling element such as a ball or a roll, and the locking body 92 may be urged outward by a spring.

The present invention is constructed as described above, and as is known, the operating lever 2 and a movable member of a transmission (not shown) are connected by an operating wire W, and the lever 2 is connected to a movable member of a transmission (not shown).
The movable member is moved by the rotational operation of , and the gear is shifted to a predetermined gear position.Normally, the positioning body 5 does not rotate, and only the operating lever 2 moves within the rotation angle range corresponding to the gear position. It rotates. When the wire W is stretched by repeating this speed change operation, the operating lever 2 is rotated to the final position in the pulling direction of the operating wire W, and the engaging protrusion 24 of the lever 2 is brought into contact with the engaging means 50. Then, the lever 2 is forcibly rotated in the wire pulling direction overcoming the rotational resistance of the positioning body 5, and the positioning body 5 is rotated to absorb and correct the amount of elongation. Although it is preferable to use a bare wire as the operating wire W, a wire provided with an outer tube may also be used.

In the embodiment described above, the rotary plate 6, washer 7, spacer 8, washer 10, and sleeve 4 were used as means for making the rotational resistance of the positioning body 5 larger than the rotational resistance of the operating lever 2, but other methods such as It may be configured such that a plurality of springs with different elastic forces are used, and the force of the spring with a large elastic force is applied to the positioning body 5, and the force of the spring with a small elastic force is applied to the operating lever 2. The means are not particularly limited.

As described above, in the present invention, a positioning body is rotatably supported on a fixed member that supports an operating lever under rotational resistance greater than the rotational resistance of the lever, and there is a gap between the positioning body and the lever. In addition to providing a positioning mechanism, the positioning body is provided with a stopper means for regulating the rotation angle of the lever with respect to the positioning body, so that the amount of elongation of the operating wire can be absorbed and corrected in the posture during gear shifting operation, and moreover, the positioning body can be operated. The amount of elongation can be absorbed and corrected by an extremely simple operation of rotating the lever beyond the regulated rotation angle by overcoming the rotational resistance of the positioning body.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted front view showing an embodiment of the device of the present invention, Fig. 2 is a cross-sectional view taken along the line taken from Fig. 1, Fig. 3 is a sectional view taken taken along the line taken from Fig. 2, and Fig. 4 is taken along the line taken from Fig. 2. −
A line sectional view, FIG. 5 is a line sectional view taken from FIG. 2. DESCRIPTION OF SYMBOLS 1... Fixed member, 11... Lever shaft, 2... Operating lever, 5... Positioning body, 9... Positioning mechanism, 50... Engaging means.

Claims (1)

[Scope of utility model registration request] A speed change operation device in which an operating lever is rotatably supported on a fixed member having a lever shaft, and one end of an operating wire is supported on the lever, and a positioning body is attached to the fixed member, and A positioning mechanism is provided between the positioning body and the lever by being rotatably supported under rotational resistance, and the positioning mechanism is rotated along with the lever by a rotation angle of the lever relative to the positioning body at a predetermined rotation angle or more. A speed change operating device characterized by being provided with an engaging means for rotating.