JPS59106393A - Variable speed operating lever for bicycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bicycle gearshift operating lever, more specifically, a lever main body is rotatably supported on a fixed member, a derailleur is operated by rotating the lever main body, and a derailleur is operated by rotating the lever main body. This invention relates to a speed change operation lever that changes speed by replacing a chain hung on a guide with one sprocket of a multi-stage sprocket.

Usually, this type of shift operation lever maintains the rotational position of the lever body by applying rotational resistance to the lever body or by providing a positioning mechanism between the lever body and a fixed member, and A pointer is provided on one side of the lever main body and the fixed member, and a display section displaying the number of gears is provided on the other side, and it is possible to read the gear position changed by the rotational operation of the lever body with these points and the display section. I'm trying to make it possible.

By the way, in a lever having a structure in which the position of the lever body is set by imparting rotational resistance to the lever body, the lever body is generally rotated by a certain amount to move the sprocket from a small diameter sprocket to a large diameter sprocket in a multi-stage sprocket. Chain on sprocket? !
: When changing gears by one wheel, the lever body is rotated excessively by a predetermined amount or more, and the chain guide in the derailleur is overshifted by a predetermined amount from the center line in the width direction of the sprocket to perform the gear change.

However, since the lever main body is maintained at its rotational position by the rotational resistance or positioning mechanism, if the chain guide is overshifted as described above due to excessive rotation of the lever main body, the gear can be changed. The chain is biased to one side in the width direction with respect to the sprocket with which the chain meshes, and as a result, the chain comes into contact with the side surface of the next sprocket during gear shifting, causing noise. As described in Publication No. 57-20478, the lever main body and a position setting body for setting the rotation operation position of the lever main body are rotatably supported on a fixed member, and the lever main body and the position setting body are rotatably supported. An interlocking mechanism having a gap corresponding to the amount of overshift required when shifting from a small diameter sprocket to a large diameter sprocket is interposed between the lever body and the setting body, so that the lever body is moved relative to the position setting body within the gap. A shift operating lever has been proposed which is configured to be able to freely rotate within a range, and in which the lever main body is rotated to return to the excessive rotation amount by the restoring force of a return spring in the derailleur.

However, according to the conventional operating lever, the above-mentioned noise problem can be solved, but the pointer or display section provided on the lever body is adapted to operate as the lever body rotates. Therefore, as mentioned above, if the lever main body rotates to return the excessive rotation amount only when shifting from a small diameter sprocket to a large diameter sprocket, the display position when shifting from a small diameter sprocket to a large diameter sprocket and from a large diameter sprocket to a small diameter sprocket will change. There is a discrepancy between the display position when changing gears and the display position when changing from a large diameter sprocket to a small diameter sprocket, and therefore,
There is a problem in that the position of the pointer does not match the display on the display corresponding to the gear position, and the gear position cannot be clearly seen even when looking at the display.

The present invention was devised in view of the above-mentioned conventional problems.The purpose of the present invention is to rotate the lever 1 body 2 by an overshift amount, and to rotate the lever body 2 by an overshift amount, and to rotate the lever body 2 to return to the amount of overshift, while changing the speed from a small diameter sprocket to a large diameter sprocket. The object of the present invention is to provide a shift operation lever that can match the display position when shifting from a large-diameter sprocket to a small-diameter sprocket with the display position when shifting from a large-diameter sprocket to a small-diameter sprocket.

Therefore, the configuration of the present invention is such that a lever main body and a position setting body for setting the position of the lever main body are rotatably provided on a fixed member, and a small diameter sprocket on a bicycle is disposed between the lever main body and the position setting body. An interlocking mechanism having a gap corresponding to the amount of overshift required when shifting from to a large diameter sprocket is interposed, and the lever body is configured to be able to freely rotate within the range of the gap with respect to the position setting body. , one of the pointer and the display section is movably supported relative to the lever body within a range corresponding to the gap and a gap corresponding to an overshift amount required when shifting from the large diameter sprocket to the small diameter sprocket; By providing the other of the pointer and the display section on the fixing member, the lever main body can be rotated excessively by an overshift amount, and
The restoring force of the return spring in the derailleur allows the lever main body to be rotated to return the excessive travel distance, and the display position when changing gears from a small diameter sprocket to a large diameter sprocket and when changing gears from a large diameter sprocket to a small diameter sprocket. This makes it possible to always match the display position at the time of display.

In addition, the "fixing member" in the present invention refers not only to a member that is fixed to a stationary member such as a frame of a bicycle via an attachment means, but also to a member such as a cover that is supported by this fixed member, or a member that supports the fixed member to the stationary member. Any device may be used as long as it includes an attachment means such as an attachment band for fixing the lever body to the lever body and can freely rotate the lever body and the position setting body.

An embodiment of the lever of the present invention will be described below based on the drawings.

The illustrated speed change operation lever has a boss at one end of the lever shaft (11) of a fixed member (1) comprising a lever shaft (11) and an upper cover (12) non-rotatably supported on the lever shaft (11). The boss part (2a) of the operating lever (2) is rotatably supported, and the lever is attached to the earthen wall of the fixing member (1). A head fixing bolt (3) extending in a direction perpendicular to the shaft (11)
) A mounting hole (13) is provided, and the bolt (RO), which is inserted into the mounting hole (RO), is screwed into the threaded tube (10) that is directly attached to the bicycle frame. The member (1) is fixed to the frame, and the fixing member (1) has a side surface extending in the same direction as the lever shaft (11) and facing the boss portion (2a) of the lever (2). A spring hole (14) that opens is provided at a position surrounding the mounting hole (13), and a plurality of retaining portions (
40) and a locking body (42) that selectively engages with one of the engaging portions (40). is elastically held via the spring (46) and the holder (44), and
A bore part (21) is provided on the inner end surface of the boss part (2a) of the lever main body (2) to support the engagement plate (41), and the engagement part (40) of the locking body (42) The lever main body (2) is configured to set the rotational position of the lever main body (2) by engaging with the lever, determine a gear position, and at the same time stop the lever main body (2) at a set position corresponding to the gear position. It is. In addition, the lever main body (2) has a boss portion (2 &)
The shaft hole (22) provided in the center is fitted with a sleeve with 7 flange (
5), and the disk-shaped upper cover (12) having a through hole is disposed on the outer end surface of the sleeve (5) via a washer. The upper lid (12) is non-rotatably supported on the lever shaft (11), and a tightening screw (61) is inserted into the upper lid (12).
) is screwed into a screw hole provided at the center of the lever shaft (11), thereby imparting a predetermined rotational resistance to the lever (2).

The lever body (2) is rotatably supported and held on the lever shaft (11) of the fixed member (1), and the lever body (2) is rotatably supported on the lever shaft (11) of the fixed member (1).
2) the position setting body (4) supported in the inner cavity (21) of
between the engagement plate (41) and the first engagement protrusion (61) as shown in FIG.
The engagement recess (62) and the first gap (11) corresponding to the overshift amount (11) required when shifting from a small diameter sprocket to a large diameter sprocket of a multi-stage sprocket on a bicycle.
Kl)′? i: The lever main body (2) is configured to be able to freely rotate within the range of the first gap (Kl) with respect to the position setting body (4) by interposing a first interlocking mechanism (6) with , Guidelines (7)? An annular display body (81) having a display section (8) displaying the number of gear positions is formed, and the display body (81)'? i:, the upper lid (1
2) is rotatably supported on the outer periphery of the display body (81).
and the lever main body (2), as shown in FIG. 4, a second engaging protrusion (91) and a second engaging portion (92) that engages with the second retaining protrusion (91). and a second gap ([2) corresponding to the first gap (Kl) and a sixth gap (Kl) corresponding to the overshift amount (a2) required when shifting from the large diameter sprocket to the small diameter sprocket. A second interlocking mechanism (9) is interposed between the display body (81) and the second and third gaps (Kl) with respect to the lever main body (2).
, (), and the pointer ring (71) is non-rotatably supported on the upper cover (12).

In the above configuration, the position setting body (4) is a locking body (4) made of a rolling body such as a ball or a roll as shown in the figure.
2) and an engaging plate (41) having a retaining portion (40), but other methods are also available, such as
As shown in Publication No. 78, the fixing member (1)
A clutch spring is slidably wound around the sleeve (5) which rotates with a predetermined rotational resistance against the lever body (2), and one end of the clutch spring is engaged with the lever body (2). You can also set the location of
Its structure is not particularly limited.

Further, the first interlocking mechanism (6) includes, for example, as shown in the figure, a first engaging portion (62) is provided on the engaging plate (41),
Engagement protrusion (61)'! E- Provided in the inner cavity (21) of the lever main body (2), and these first engaging protrusions (61) and the first
The first gap (K1) is provided between the first engagement protrusion (61) and the first engagement protrusion (62).
It may be provided opposite to the four engaging parts (62),
Its structure is not particularly limited.

Further, the pointer (7) may be formed by coloring the outer periphery of the pointer tip (71) as shown in the figure, or may be formed by a protrusion that is fixed to the pointer ring (71) integrally or by adhesive etc. The shape and form are not particularly limited.

Further, the display part (8) may be formed by coloring or layering numbers or scales on the outer circumferential surface of the annular display body (81) having a fitting part on the inner circumferential surface, or pasting printed numbers or scales on the outer circumferential surface. However, the display method is not particularly limited. A predetermined movement resistance is applied to the display section (8) so that the lever main body (2) moves between the second and sixth gaps (1, (Kl)) with respect to the display section (8). However, the resistance applying means is not particularly limited.

Further, the second interlocking mechanism (9) includes, for example, as shown in the figure, a second engaging protrusion (91) is provided on the display body (81), and the second interlocking mechanism (9)
An engagement recess (92) is provided in the lever main body (2), and the second and third gaps (Kl) are provided between the second engagement protrusion (91) and the second engagement fourth part (92), (Km), and the lever body (2)? When changing the chain from a small-diameter sprocket to a large-diameter sprocket by rotating, as shown in Fig. 12, the lever body (2)
rotates freely within the range corresponding to the second and sixth gaps (Kl) + (Kl) with respect to the display part provided on the display body (81), and after changing to the larger diameter sprocket, the lever body (2) by releasing your hand from the lever body (2).
) makes one full rotation within the range corresponding to the second gap (Kl) with respect to the display part (8), and when changing from a large diameter sprocket to a small diameter sprocket, the lever body (
2) rotates seven times within a range corresponding to the sixth gap (K3) with respect to the display section (8). Note that the second engaging protrusion (91) and the second engaging portion (92) may be provided oppositely. Further, the display body (81) is placed between the second and third gaps (Kri, (
The means for movably supporting within the range corresponding to K3) is not particularly limited.

The present invention is constructed as described above, and as is known, the lever main body (2) and the movable member of the derailleur are connected by an operation wire, and when changing gears from a small diameter sprocket to a large diameter sprocket of a multi-stage sprocket, The lever body (2
) is operated in the forward movement direction, and when shifting from the large diameter sprocket to the small diameter sprocket, the lever main body (2) is rotated in the backward movement direction and the derailleur is operated. The movable member is actuated by the restoring force of the return spring in the movable member, and the chino hooked on the chino guide provided on the movable member is hooked onto one sprocket of the single multi-stage sprocket, thereby shifting to a predetermined gear position. .

Incidentally, the rotational position of the lever main body (2) and, by extension, the operating position of the chino guide are maintained by the position setting body (4). Further, the display section (8) displays information at predetermined intervals corresponding to the amount of rotation of the lever main body (2) between each gear stage.

Next, the case of using the rear derailleur to change gears will be explained based on FIG. 12.

Figure 12 shows that the derailleur's chain guide (G) is located within the first gap (K1) on the opposite side of the large diameter sprocket (S@) with respect to the center line in the width direction of the small diameter sprocket (Sl). In the state where the lever body (2) is in the excessively moved position (&), the lever body (2) is in the first gap (K) with respect to the position setting body (4).
It is stopped at a position where it can freely rotate within the range of (I), and the display part (8) supported on the lever body (2) is in the range of (A).
As shown in the figure, the second and third gaps (
Kl).

The vehicle is stopped in a state where it can move within the range of (Kl), and the low speed stage display O on the display section (8) and the pointer (7) match.

When the lever main body (2) is rotated in the forward direction (arrow X direction) from this state, the lever main body (2) first rotates freely within the range of the first gap (K1), and the chain guide ((
)) moves to the position (b) corresponding to the center line in the width direction of the small diameter sprocket (81), and the lever main body (2)
As shown in (b), it rotates freely within the second gap (K) with respect to the display section (8), and the first level display O and the pointer (7) match.

Next, when the lever main body (2) is rotated within the range of the third gap (K) in the forward movement direction, the chain guide (G) will move against the width direction center line of the small diameter sprocket within the range of the third gap. It has moved excessively and is located at position (6), and the display section (8) can now move following the rotation of the lever body (2) as shown in (c), and the 1st stage display O and the pointer (7) ) are in agreement.In this state, when the lever main body (2) is further rotated in the forward direction by an amount of rotation corresponding to the distance (L) between the center lines in the width direction of each sprocket, the chain guide (G ) is the 2nd stage sprocket) (8), which has moved excessively (el) towards the larger diameter sprocket side from the center line in the width direction. In addition, the display section (8) moves following the rotation of the lever main body (2), and the second stage display (2) and the pointer (7) match, and the lever main body (2) When the operating force 2) is released, the lever main body (2) freely rotates in the backward movement direction (arrow Y direction) within the range of the first gap (Kl) due to the restoring force of the return spring, and the chain The guide (G) stops at a position ('l) corresponding to the center line in the width direction of the second stage sprocket (St), and also stops at the position ('l) corresponding to the center line in the width direction of the second stage sprocket (St).
2) rotates seven times in the backward movement direction within the range of the second gap (K2) with respect to the display part (8).

Next, when the lever body (2) is further rotated in the forward direction from the state where the gear has been shifted to the second gear position, first the lever body (2) is rotated in the forward direction.
) rotates freely within the range of the first gap (K1), and the chain guide (G) moves excessively by (el) toward the large diameter sprocket with respect to the center line in the width direction of the second stage sprocket (S). In addition, the lever main body (2) rotates freely within the second gap (K) relative to the display section (8), and the display section (8) can move following the rotation of the lever main body (2). .In this state, when the lever body (2) is further rotated in the forward direction by an amount of rotation corresponding to the distance (L), the chain guide (()
) is moved excessively (el) toward the large diameter sprocket from the center line in the width direction of the third stage sprocket (s3), and the chain 2 hung on the chain guide is located at the third stage sprocket (sl).
The display section (8) moves following the rotation of the lever main body (2), and the 3rd stage display (3) and the pointer (7) match. Next, as in the case described above, the operating force on the lever body (2) is released. still,
Shifting to the sixth gear and subsequent gears is the same as shifting to the second gear.

Next, the case of shifting from a large diameter sprocket to a small diameter sprocket will be explained.

In this case, the chain guide (G) is the 6th sprocket)
(Ss), and the lever main body (2) is stopped at a position where free rotation in the backward movement direction is not possible with respect to the position setting body (4), and the display Part (8)
As shown in ), the sixth gap (
It is possible to move within a range of Km), and the 6th step display matches the pointer (7).

From this state, when the lever main body (2) is rotated in the backward direction (direction of arrow Y) within the range of the sixth gap (K), the display section (
8) becomes movable following the rotation of the lever body (2) as shown in (E), and the 6-stage display and pointer (7)
is consistent with Further, the chain guide (G) is excessively moved from the center line position in the width direction of the sixth stage sprocket (S) to the small diameter sprocket side (h) due to the restoring force of the return spring in the derailleur. In this state, when the lever main body (2) is further rotated in the backward direction by an amount of rotation corresponding to the distance (I,), the chain guide (G) is moved over the distance (L) due to the restoring force of the return spring. The display section (8) moves to follow the rotation of the lever main body (2), and the 5th level display (3) and the pointer (7) match. Note that shifting to the fourth gear and subsequent gears is the same as the case of shifting to the fifth gear described above. 81) is movably supported with respect to the lever main body (2), and the pointer (7) is provided on the fixed member (1), but the opposite may be used.

Further, a ring-shaped display body (81) is formed, and this display body (8
A display section (8) is provided on the outer peripheral surface of the display body (81).
) is rotatably supported on the fixed member (1), and the display body (8
A second interlocking mechanism (9) is provided between the lever main body (2) and the lever main body (2), and a display part (8) is provided on the display body (82) formed in an arc shape as shown in FIGS. 6 and 7. 8.9, and directly supported on the lever main body (2), or as shown in Fig. 8.9, a display body (83) formed in an annular shape and provided with a display portion (8) on its outer peripheral surface can be attached to the lever. The lever body (2) is directly supported on the second body (2) to provide a predetermined resistance between the display body (86) and the fixing member (1), and the lever body (2) is directly supported on the second body (86).
and a third gap (Kl).

It may be possible to freely rotate within the range of (Ks). In the case of Fig. 6.7, for example, an arc-shaped recess (15) for receiving the arc-shaped display body (82) is provided in the upper lid (12), and a window hole that opens in this recess (15) is provided. is provided, and the window hole serves as the pointer (7). Further, when the display section (8) is provided in an annular display body, it may be constructed as shown in FIGS. io and 1i. In this case, for example, the upper lid (12
), the second locking protrusion (91) of the second interlocking mechanism (9)
In addition, in the above embodiment, the case where it is used with a rear derailleur is explained, but it can be similarly applied when used with a front derailleur. The lever is of a normal type in which the support side part of the lever body (2) to the fixing member (1) is exposed without being protected by a cover, ) can be similarly applied to a console type with a cover that protects the support side part.

As described above, according to the present invention, the lever body is rotated excessively relative to the position setting body that sets the position of the lever body, and the chain guide in the derailleur is overshifted from the small diameter sprocket to the large diameter sprocket. The structure is such that one of the pointer and the display part has a gap corresponding to an overshift amount necessary for shifting from the small diameter sprocket to the large diameter sprocket with respect to the lever main body; Supporting it so as to be movable within a range corresponding to a gap equivalent to 77 tons required when shifting from the large diameter sprocket to the small diameter sprocket, and providing the other of the pointer and the display portion on the fixed member, When shifting from a small diameter sprocket to a large diameter sprocket, and when shifting from a largest diameter sprocket to a next smaller diameter sprocket, the lever body is made to rotate freely relative to the pointer or display portion supported on the lever body. Because of this, the display position when shifting from a small-diameter sprocket to a large-diameter sprocket can always be accurately matched with the display position when shifting from a large-diameter sprocket to a small-diameter sprocket. It can be read.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the lever of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line -
■ Line sectional view, Figure 4 is a cross-sectional view along line 1 - ■, Figure 5 is an explanatory diagram showing the relationship between the pointer and the display section, Figures 6 to 11
The figure is an explanatory view showing another embodiment, and Fig. 12 is an explanatory view showing the positional relationship of a lever main body, a display unit movably supported with respect to the lever main body, a bicycle spruker, and a chain guide of a derailleur. It is. (1)...Fixing member (2)...Lever main body (4)...Position setting body (6)...Interlocking mechanism (7)...Pointer (8)...Display section ( Kl) , (xz) , (
Ks) ... Gap Figure 8

Claims (1)

[Claims] A lever main body and a position setting body for setting the position of the lever main body are rotatably provided on the fixed member, and a gear shift from a small diameter sprocket to a large diameter sprocket in a bicycle is provided between the lever main body and the position setting body. An interlocking mechanism having a gap corresponding to the amount of overshift required at the time is interposed so that the lever main body can freely rotate within the gap within the range of the gap with respect to the position setting body. one of the levers is supported movably within a range corresponding to the gap and a gap corresponding to the overshift amount required when shifting from the large-diameter sprocket to the small-diameter sprocket with respect to the lever body; A bicycle gear shift operating lever characterized in that the other of the pointer and the display section is provided.