JPH0711029Y2 - Bicycle gear shift operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a gear shift operating device for use on a bicycle, more specifically, a control member rotatably supported by a fixing member fixed to a bicycle frame or the like, and the rotation of the lever. The present invention relates to a bicycle gear shift operation device that operates a transmission to shift gears to a predetermined gear position.

(Prior Art) Conventionally, in a bicycle gear shifting operation device in which a fixed member rotatably supports an operating lever for operating a transmission, as shown in Japanese Patent Publication No. 62-15396, there are a plurality of engagements. A positioning body having a portion, an engagement body that engages with at least one of the engagement portions, and one of the positioning body and the engagement body is pressed toward the other to engage the engagement body and the engagement portion. In this case, a positioning mechanism including a compression spring that provides an engagement resistance that overcomes the action force of the return spring in the transmission is provided, and one of the positioning body and the engaging body of the positioning mechanism is rotated together with the lever. The fixing member is rotatably supported on the fixing member while the other is attached to the fixing member, and the positioning mechanism switches the positioning operation state to the positioning inoperative state. The positioning body or the engagement body pressed by the compression spring is displaced in the compression direction of the compression spring to release the engagement between the engagement body and the engagement portion, and the positioning mechanism is changed from the positioning operation state to the positioning non-operation state. It is known that the lever is provided with a rotational resistance against the acting force of the return spring in the positioning inoperative state.

(Problems to be solved by the invention) However, in the conventional gear shift operating device, when the positioning mechanism is controlled from the positioning operating state to the positioning inoperative state,
Since it is necessary to displace the positioning body or the engagement body pressed by the compression spring in the positioning mechanism in the compression direction of the compression spring by the operation of the operation body to completely disengage the engagement body from the engagement portion. However, there is a problem in that a large operating force is required to operate the operating body, which makes it difficult to operate the operating body.

The present invention has been devised in view of the above conventional problems, and an object thereof is to control the positioning mechanism from an operating state to a non-operating state and a control from the non-operating state to an operating state by slightly changing the operating body. The point is that it can be done lightly by simply manipulating the operation amount.

(Means for Solving the Problems) Therefore, the present invention provides an operation lever rotatably supported by a fixed member, a positioning body having a plurality of engaging portions, and at least one of the engaging portions. An engaging body to be engaged and a compression spring that presses one of the positioning body and the engaging body toward the other, one of the positioning body and the engaging body can rotate together with the operation lever, and the other substantially. A shift mechanism for a bicycle, comprising a positioning mechanism that makes relative rotation impossible, and operating a transmission by operating the operation lever, wherein the shift mechanism is displaceable in the expansion / contraction direction of the compression spring, and Displacement of the compression spring in the compression direction by controlling the positioning mechanism from the positioning operation state to the positioning inoperative state while maintaining the engagement between the engagement portion and the engagement body by the displacement of the compression spring in the extension direction. By A control body for controlling the positioning mechanism to operate and a control body for operating the control body in the expansion / contraction direction of the compression spring to hold the position of the control body are provided.

(Operation) When the positioning mechanism (4) is in the positioning operation state, a predetermined engagement resistance is applied to the engagement between the engagement body (42) and the engagement portion (41a) by the compression spring (43). By rotating the lever (2), one of the positioning body (41) and the engagement body (42) rotates together with the lever with respect to the other, and the lever is accurately positioned at the position set by the positioning mechanism. It can be done. Further, when the positioning mechanism (4) is controlled to the positioning inoperative state, when the operating body (7) is operated, the control body (5) causes the compression spring (43) to move.
The compression spring (43) expands by being displaced in the expansion direction of
The acting force of the compression spring (43) is reduced, and the positioning mechanism is in the positioning inoperative state. Moreover, the control of the positioning mechanism from the operating state to the non-operating state and the control from the non-operating state to the operating state are performed while maintaining the engagement between the engaging portion of the positioning body and the engaging body. The amount of displacement of the control body for performing these controls can be made smaller than that in the case where control is performed by completely disengaging the engagement portion and the engagement body. As a result, the amount of operation of the operating body can be reduced, and the control operation can be further reduced. As a whole, the control from the operating state to the inactive state and the control from the inactive state to the operating state are compressed. In the region where the pressing force of the spring becomes weak, the operation body can be lightly operated by operating a small operation amount.

(Example) In the drawings, (1) is a fixing member having a cylindrical lever shaft (11), and (2) is a bearing portion (21a) rotatably fitted into the lever shaft (11). An operating lever having a base portion (21) and an operating portion (not shown) extending from the base portion (21) in a radial direction, wherein the fixing member (1) is a boss portion fixed to a frame of a bicycle by welding. And the lever shaft (11) protruding outward from one end surface of the boss portion, the lever shaft (11) having a support shaft portion (31) having an annular collar portion, and the support shaft (31). Large-diameter shaft part (32) continuous with the large-diameter shaft part through the step part (3b), and a concavo-convex line continuous with the large-diameter shaft part through the step part (3b) and extending in the axial direction on the distal end side outer peripheral surface A cylindrical fixed bush (3) consisting of a small-diameter shaft portion (33) and a large-diameter shaft portion inner surface of the fixed bush (3) is detachably supported. The lever shaft fitted nonrotatably to (11), the lever shaft (11) the fixing bushing (3) by fastening the Atamazuke threaded body screwed into a screw hole provided in the center of
Is fixed to the fixing member (1).

The lever (2) rotatably supports the bearing portion (21a) on the support shaft portion (31) of the bush (3).

Thus, in the embodiment shown in FIG. 1, a disc-shaped positioning body (41) having a plurality of engaging portions (41a) provided around the shaft center of the lever shaft (11), and the positioning An engaging body (4) located on one axial side of the lever shaft (11) with respect to the body (41) and engaged with at least one of the engaging portions (41a).
2) and a compression mechanism (4) provided with a compression spring (43) for pressing the engaging body (42) toward the positioning body (41), and the engaging body (4) in the positioning mechanism (4) is provided. 42) is integrally formed with a disc-shaped holder (44) having a through hole and is rotatably and axially supported by the large-diameter shaft portion (32) of the bush (3). A plurality of engaging projections (44a) are provided on the outer periphery of the (44) at predetermined intervals in the circumferential direction, and engaging recesses (22) that engage with these engaging projections (44a) are provided in the base (21). Is provided on the inner peripheral surface of the bush (3) so that the engaging body (42) can rotate together with the lever (2), and the positioning body (41) is located on the proximal end side of the small diameter shaft portion (33) of the bush (3). The spring (43) expands and contracts on the tip side of the small diameter shaft portion (33) of the bush (3) while supporting the bush (3) so as to be rotatable and axially movable. , I.e. displaceable in the axial direction of the lever shaft (11), and said spring (43)
Of the positioning mechanism (4) from the positioning operation state to the positioning non-operation state while maintaining the engagement between the engagement portion (41a) and the engagement body (42) by the displacement of the compression mechanism in the extension direction. A cylindrical control body (5), which controls the positioning mechanism (4) to operate by the displacement of the spring (43) in the compression direction, is supported so as not to rotate relative to the control body (5) and the positioning. The friction plate (6) is interposed between the body (41) and the control body (5) in the expansion and contraction direction of the spring (43) in a screw hole provided in the center of the lever shaft (11). The operating body (7) to be moved is screwed, and by tightening the operating body (7), the control body (5) is displaced in the compression direction of the spring (43), and the positioning body (41).
Is pressed against the step (3b) of the bush (3), and the engaging body (42) is provided between the positioning body (41) and the step (3b).
A frictional resistance that is larger than the engagement resistance between the engagement portion (41a) and the engagement portion (41a) is given to make the positioning body (41) substantially non-rotatable relative to the lever shaft (11), and the operating body (7) is loosened. By the operation, the control body (5) is displaced in the extension direction of the spring (43), and the frictional resistance between the positioning body (41) and the step portion (3b) is increased by the engaging body (42) and the engaging portion. When the lever (2) is rotated, the positioning body (41) is maintained in a state where the engagement between the engagement body (42) and the engagement portion (41a) is maintained. The positioning mechanism (4) is rotated together with the engaging body (42) together with the lever (2) so that the positioning mechanism is changed from the positioning operation state to the positioning inoperative state, and the displacement of the control body (5). The moved position is held by the operating body (7).

In the above structure, the positioning body (41) has a disk shape with a through hole in the center, and a plurality of the engaging portions (41a) are provided at one end surface of the positioning body (41a) at predetermined intervals in the circumferential direction. There is. Further, the engaging portion (41a) is formed as a concave line extending in the radial direction. Further, the engagement body (42) is provided on one end surface of the disc-shaped holding body (44) so as to project, and has a ridge extending in the radial direction. The compression spring (43) is composed of a plurality of disc springs, and these disc springs are superposed in the axial direction of the lever shaft (11).

Further, the control body (5) is provided with a concavo-convex line on its inner peripheral surface that meshes with the concavo-convex line of the small diameter shaft portion (33), and is movable only in the axial direction.

Further, the friction plate (6) is formed in a disc spring shape. The acting force of the compression spring (43) is applied to the friction plate (6) by the engaging body (42) and the positioning body (4).
1) is acting through.

The operating body (7) is a bolt having a C-shaped operating handle (not shown) on the head, and the head of the operating body (7) and the small-diameter shaft portion of the bush (3). The loosening prevention spring (8) of the operating body (7) is provided between the side end face and the side end face.
Is intervening.

Further, between the engagement protrusion (44a) and the engagement recess (22), rotation of the lever (2) with respect to the engagement body (42) is allowed, and when the lever (2) is moved forward, The lever (2)
Is provided so as to return to the engaging body (42) in correspondence with the overshift amount, and the operation lever (2) is freely returned to the engaging body (42) by an amount corresponding to the above-mentioned gap with respect to the forward operation amount. .

Further, (9) in the figure is the base portion (21) of the lever (2).
A cup that closes the open end on one end side, and (10) is a lever bush.

The present invention is configured as described above. In the positioning operation state and the positioning non-operation state of the positioning mechanism (4), the engagement body (42) is the engagement portion (41) of the positioning body (41).
a) and the engagement portion (41a) of the engagement body (42) is maintained, and the engagement resistance between the engagement body (42) and the engagement portion (41a) is , The acting force of the return spring in the transmission is larger. Then, in the positioning operation state, the control body (5) is tightened by the operation body (7).
The positioning body (41) is strongly pressed against the step portion (3b) of the bush (3) via the friction plate (6), and the frictional resistance between the positioning body (41) and the step portion (3b) is It is larger than the engagement resistance between the engagement body (42) and the engagement portion (41a), and the positioning body (41) is substantially non-rotatable relative to the bush (3). Therefore, when the operation lever (2) is rotated, the rotation of the lever (2) causes the engagement recess (22) to rotate.
Is transmitted to the engaging body (42) through the engaging projection (44a), and the engaging body (42) is moved to the positioning body (41) by an amount corresponding to the pitch between the engaging portions (41a). Against the acting force of the lever (2) and rotates together with the lever (2). Therefore, the operating lever (2) can be accurately positioned at the position set by the positioning mechanism (4).

Next, in the case where the positioning mechanism (4) is switched from the positioning operating state to the positioning inoperative state and the rotation resistance against the acting force of the return spring is applied to the lever (2),
Since the operating body (7) is rotated in the loosening direction, the pressing force on the stepped portion (3b) of the bush (3) of the positioning body (41) is small due to the rotation of the operating body (7). The frictional resistance between the positioning body (41) and the stepped portion (3b) is smaller than the engagement resistance between the engagement body (42) and the engagement portion (41a), and the positioning body (41) is It becomes possible to rotate together with the engagement body (42) with respect to the bush (3) in a state where the engagement with the engagement portion (41a) of the combined body (42) is maintained, and also the positioning body (41) and the stepped portion. The frictional resistance with (3b) is
It is larger than the acting force of the return spring. Therefore, when the operation lever (2) is rotated, the rotation of the lever (2) is transmitted from the engagement recess (22) to the engagement body (42) via the engagement protrusion (44a), and the engagement body (42) The positioning body (41) with the positioning body (41) integrated with the positioning body (41)
Rotates together with the lever (2).

As described above, the operating body (7) is rotated in the loosening direction, the control body (5) is displaced in the extension direction of the compression spring (43), and the positioning mechanism (4) is controlled from the positioning operation state to the positioning inoperative state. Therefore, the operating force required to operate the operating body (7) can be reduced, and the operating body (7) can be easily operated. Further, since it is only necessary to reduce the pressing force of the positioning body (41) on the bush (3) by operating the operating body (7), the above-mentioned control is performed by slightly operating the operating body (7). It can be done lightly by simply manipulating the amount.

Further, when the positioning mechanism (4) is controlled to be in an inoperative state, between the positioning body (41) and the step (3b), or
Friction resistance against the action force of the return spring is applied to the contact portion between the positioning body (41) and the control body (5) and the friction plate (6) to move the lever (2) to the return spring. This allows the operating position to be maintained when the rotational operation is performed in the direction opposite to the acting force.

Next, in the embodiment shown in FIG. 2, as in the case of FIG. 1, the engaging body (4) integrally formed with the disc-shaped holding body (44) is formed.
2) is rotatably and axially movably supported by the large-diameter shaft portion (32) of the bush (3) so that it can rotate together with the lever (2). The engaging body (42) and the bush (3) The compression spring (43) is interposed between the step body (4a) and the step portion (4a), and the positioning body (41) is rotated and axially moved toward the proximal end side of the small diameter shaft portion (33) of the bush (3). While being movably supported, an engaging portion (30) of a concave and convex line that is relatively non-rotatable and movable in the axial direction is provided between the positioning body (41) and the step portion (3b). Positioning body (4
1) is made rotatable with respect to the bush (3), and a screw is provided on the outer periphery of the small diameter shaft portion (33) of the bush (3) on the tip side so that the small diameter shaft portion (33) has a cylindrical operating body. (7) is screw-engaged, and a cam surface (71) axially recessed in the circumferential direction is provided on the inner end surface of the operating body (7). The cam surface (71) and the positioning body (41). ) And a control body (5) consisting of a pin, and the small diameter shaft portion (33).
And a facing surface (61) facing the outer end surface of the base (21) of the lever (2) and an insertion hole (62) of the control body (5).
A friction plate (6) made of a disc having a shaft is supported so as not to rotate and freely move in the axial direction, and the control body (5) is compressed in the insertion hole (62) of the friction plate (6). The spring (43) is inserted so as to be displaceable in the expansion and contraction direction, and a head fixing screw (20) is screwed into the screw hole of the lever shaft (11) to attach the bush (3) to the lever shaft (11). And the operation body (7) is prevented from falling off. still,
The acting force of the compression spring (43) acts on the control body (5) via the engaging body (42) and the positioning body (41).

In this embodiment, when the positioning mechanism (4) is brought into the positioning operation state, the operating body (7) is rotated in the loosening direction, and the cam surface ( 71) Control body (5) is compressed spring (43)
Is displaced in the compression direction, the positioning body (41) is pressed against the stepped portion (3b) of the bush (3), and the meshing resistance of the meshing portion (30) causes the engagement body (42) and the engagement portion (41a). Of the positioning body (41) becomes substantially non-rotatable with respect to the bush (3), and the engaging body (42) is rotated by the lever (2) to cause the positioning body (41) to rotate. By rotating with respect to each other, the positioning mechanism (4) is brought into a positioning operation state.

Further, when the positioning mechanism (4) is controlled from the positioning operation state to the positioning inoperative state, the operating body (7) is rotated in the tightening direction, and the operating body (7) is rotated. The cam surface (71) causes the control body (5) to be displaced in the extension direction of the compression spring (43), and the engagement portion (41a) of the engagement body (42) is maintained in a state where the engagement portion (41) is maintained. The meshing of 30) is released, and the positioning body (41) can rotate with respect to the bush (3).

Then, when the lever (2) is rotationally operated, the positioning body (41) rotates together with the lever (2) in a state where the engaging body (42) and the positioning body (41) are integrated.
Further, when the operating body (7) is tightened, the facing surface (61) of the friction plate (6) is pressed against the outer end surface of the base portion (21) of the operating lever (2), and the lever (2).
In addition, the rotational resistance against the acting force of the return spring is adjustably provided.

Next, in the embodiment shown in FIG. 3, as in the case of FIGS. 1 and 2, the engaging body (4) formed integrally with the disc-shaped holding body (44) is used.
2) is rotatably and axially movably supported by the large-diameter shaft portion (32) of the bush (3) so that it can rotate together with the lever (2). The engaging body (42) and the bush (3) The compression spring (43) is interposed between the step body (3a) and the step portion (3a), and the positioning body (41) is rotated and axially moved toward the base end side of the small diameter shaft portion (33) of the bush (3). The movable body is movably supported, the engagement portion (30) is provided between the positioning body (41) and the step portion (3b), and the positioning body (41) is disengaged when the engagement portion (30) is disengaged. While making it rotatable with respect to (3), a cylindrical control body (5) is axially displaceably and non-rotatably supported by the small-diameter shaft portion (33) of the bush (3). The flexure having an opposing surface (61) on the outer peripheral surface of the body (5) that opposes the outer end surface of the base portion (21) of the lever (2). A cam surface (51) that axially displaces the non-rotatable plate (6) and is non-rotatably supported, and that protrudes axially outward in the circumferential direction at the outer end surface of the control body (5). And the small diameter shaft portion (33)
A cam surface (72) that is recessed inward in the axial direction toward the circumferential direction and that engages with the cam surface (51); and a contact surface (73) that contacts the outer surface of the friction plate (6). The operation body (7) having a cylindrical shape is rotatably supported, and the fixing screw (20) is screwed into the screw hole of the lever shaft (11) to prevent the operation body (7) from falling off. is there. In FIG. 3, the acting force of the compression spring (43) is applied to the control body (5) and the operating body (7) by the engaging body (42) and the positioning body (4).
1) is acting through. Reference numeral (8) in FIG. 3 denotes a detent spring which is interposed between the head of the fixing screw (20) and the end face of the bush (3).

In this embodiment, when the positioning mechanism (4) is brought into the positioning operation state, the fixing screw (20) is loosened once and the operating body (7) is rotated in one direction. With the rotation, the control surface (5) is displaced in the compression direction of the compression spring (43) by the cam surfaces (72) and (51), and the positioning body (41) is pressed against the stepped portion (3b) of the bush (3). The meshing resistance of the meshing part (30) is larger than the engagement resistance between the engaging body (42) and the engaging part (41a), and the positioning body (41) is substantially larger than the bushing (3). Becomes relatively unrotatable. Then, the fixing screw (20) is tightened to prevent the operating body (7) from rotating. Then, by rotating the lever (2), the engaging body (42) rotates with respect to the positioning body (41), and the positioning mechanism (4) is brought into a positioning operation state.

Further, when the positioning mechanism (4) is controlled from the positioning operation state to the positioning non-operation state, the fixing screw (20) is once loosened and the operating body (7) is rotated in the other direction. Along with the rotation of (7), the cam surface (72)
The control body (5) is displaced in the extension direction of the compression spring (43) by the (51), and the engagement portion (30) is maintained in a state where the engagement with the engagement portion (41a) of the engagement body (42) is maintained. Is disengaged, and the positioning body (41) can rotate with respect to the bush (3). Then, when the lever (2) is rotated,
The positioning body (41) rotates together with the lever (2) in a state where the engagement body (42) and the positioning body (41) are integrated. Further, the operating body (7) is pressed by the tightening operation of the fixing screw (20), and this pressing force is transmitted from the contact surface (73) to the friction plate (6) and the friction plate (6) is moved. The facing surface (61) is pressed against the outer end surface of the base portion (21) of the operation lever (2), and the lever (2) is given a rotational resistance against the acting force of the return spring.

In addition, in the case of FIG. 3, it is necessary to loosen the fixing screw (20) integrally when rotating the operating body (7), but in addition, the operating body (7) is rotated without loosening the fixing screw (20). It may be operable. In this case, for example, between the contact surface (73) of the operating body (7) and the friction plate (6), a cam surface that is displaced in the opposite direction to the cam surfaces (72) (51) is 72) Formed in the same shape as (51),
When the operating body (7) is rotationally operated in one direction, the control body (5) is displaced in the compression direction of the compression spring (43), and when the operating body (7) is rotationally operated in the other direction, the control is performed. The body (5) is displaced in the extension direction of the compression spring (43), and the friction plate (6) is displaced toward the end face side of the base portion (21) of the lever (2).

Further, in the embodiment described above, the engaging body (42) of the positioning mechanism (4) can rotate together with the operating lever (2), and the positioning body (41) is substantially rotated relative to the lever shaft (11). It was impossible, but the opposite may be true.

Further, the engaging body (42) may have a structure in which a protrusion is provided on one side of the holding body (44), or a rolling element may be used. The compression spring (43) may be a coil spring instead of a disc spring. The compression spring (43) is displaced in the axial direction of the lever shaft (11) through the engaging body (42) and the positioning body (41) by the operation of the operating body (7) as shown in FIGS. In addition to the configuration of compressing / expanding,
The control body (5) is provided between the supporting side edge of the compression spring (43) to the bush (3) and the step portion (3a) of the bush (3) in the figure, and the compression spring (43) is provided. Directly compressed
It may be configured to extend.

Further, in the embodiment shown in FIGS. 1 to 3, the positioning body (41) that is substantially incapable of rotating relative to the lever shaft (11) is
While the positioning mechanism (4) is in a positionally inoperative state, the bush (3) is rotatable, but other than that, for example, as shown in FIG. 4, a holding body for the engagement body (42) that rotates together with the operation lever (2) ( 44) may be rotatable with respect to the operation lever (2) when the positioning mechanism (4) is in the inoperative position.

The one shown in FIG. 4 supports the positioning body (41) on the small-diameter shaft portion (33) of the bush (3) such that the positioning body (41) cannot rotate relative to the bushing (3) and is movable in the axial direction, while the base portion of the lever (2) is provided. (21) The holder which is provided on the inner circumference with an annular step (23) facing the one end surface of the outer periphery of the holder (44) formed in a disc shape and which is supported by the medium diameter shaft (32). (44) is rotatable with respect to the lever (2), the friction plate (6) is interposed between the holder (44) and the stepped portion (3c) of the bush (3), and A cylindrical control body (5) for pressing the holding body (44) against the stepped portion (23) is provided, and the control body (5) is integrally provided with a cylindrical operation body (7) for performing the operation. The body (7) is screwed onto the inner circumference of the base (21), the compression spring (43) is interposed between the operating body (7) and the positioning body (41), and the operating body ( The control body (5) is displaced in the compression direction of the spring (43) by the rotating operation of 7) in the tightening direction, and the holding body (44) is moved to the lever (2).
By pressing it against the step (23) of the holder (44) and the step (2
A friction resistance larger than the engagement resistance between the engagement body (22) and the engagement portion (41a) is provided between the engagement body (22) and the engagement body (42) so that the engagement body (42) and the lever (2) rotate together. The control body (5) by rotating the operation body (7) in the loosening direction.
Is displaced in the extension direction of the spring (43), and the frictional resistance between the holding body (44) and the step (23) is reduced by the engaging body (4).
2) is smaller than the engagement resistance between the engagement portion (41a) and the lever (2) is rotated, while maintaining engagement with the engagement portion (41a) of the engagement body (42). The operating lever (2) is rotated with respect to the engaging body (42) so that the positioning mechanism (4) is changed from the positioning operation state to the positioning inoperative state. In addition, when the positioning mechanism (4) is controlled to a positioning inoperative state, frictional resistance between the holding body (44) and the step portion (23), or the holding body (44) and the step portion (4c). The frictional resistance between the friction plate (6) and the friction plate (6) is made larger than the acting force of the return spring, and when the lever (2) is rotated in the direction opposite to the acting force of the return spring, this operation is performed. I am able to maintain my position.

In the embodiment described above, the bush (3) is attached to the lever shaft (11), but this bush (3) is not always necessary.

(Effects of the Invention) As described above, according to the present invention, the control of the positioning mechanism from the operating state to the non-operating state and the control from the non-operating state to the operating state are performed by the pressing force of the compression spring during the positioning operating state. On the other hand, the control can be performed in a region where the pressing force becomes weaker, and moreover, these controls, that is, the control from the operating state to the inactive state of the positioning mechanism and the control from the inactive state to the operating state are performed by positioning. Since it is performed in a state where the engagement between the engaging portion of the body and the engaging body is maintained, the displacement amount of the control body for performing these controls is set to the engaging portion and the engaging body as in Reference Examples 1 to 3. This can be reduced as compared with the case where the engagement with and is completely disengaged and controlled. As a result, the operation amount of the operating body can be reduced and the control operation can be lightened, and the control from the operating state to the inactive state and the control from the inactive state to the operating state can be compressed as a whole. In the region where the pressing force of the spring becomes weak, the operation body can be lightly operated by operating a small operation amount.

Further, since the above-mentioned control is performed in a state where the engagement between the engaging portion and the engaging body is maintained, when the control from the inoperative state to the operating state is performed, the operating body is slightly operated regardless of the position of the operating lever. The control operation can be lightly performed only by performing a quantity operation.

[Brief description of drawings]

FIG. 1 is a partially omitted sectional view showing an embodiment of the device of the present invention,
2 and 3 are partially omitted sectional views showing another embodiment,
FIG. 4 is a sectional view of only a main part showing still another embodiment. (1) …… Fixing member (11) …… Lever shaft (2) …… Operating lever (21) …… Base (4) …… Positioning mechanism (41) …… Positioning body (41a) …… Engaging part ( 42) ...... Engagement body (43) ...... Compression spring (5) ...... Control body (7) ...... Operation body

Claims (1)

[Scope of utility model registration request] 1. An operating lever rotatably supported by a fixed member, a positioning body having a plurality of engaging portions, an engaging body engaging with at least one of the engaging portions, and the positioning body and the engaging body. And a compression spring that presses one of them toward the other, and one of the positioning body and the engaging body is rotatable with the operation lever, and the other is substantially non-rotatable. A bicycle gear shift operation device in which a transmission is operated by operating the operation lever, the bicycle gear shift operation device being displaceable in a direction of expansion and contraction of the compression spring,
The positioning mechanism is controlled from the positioning operation state to the positioning non-operation state in a state where the engagement between the engagement portion and the engagement body is maintained by the displacement of the compression spring in the extension direction, and the compression spring moves in the compression direction. A control body that controls the positioning mechanism to operate by displacement is provided, and an operation body that operates the control body in a direction in which the compression spring expands and contracts to hold the position of the control body. Bicycle gear shifting operation device.