JPH0717666Y2 - Handlebar control device for bicycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a handlebar control device for a bicycle, more specifically,
The present invention relates to a handlebar control device capable of locking rotation of a handlebar with respect to a bicycle frame.

(Prior Art) Conventionally, as a device of this type, as seen in Japanese Utility Model Publication No. 57-51992, a rotating member that rotates together with a handlebar,
A locking part is provided on one side of the fixed member that supports the rotating member, and on the other side, the rotation of the rotating member is locked by engagement with the locking part, and the lock body is unlocked by disengagement. A lock maintaining mechanism for maintaining the engagement state of the lock body with the locking portion is provided so that a heavy load is put on a luggage basket mounted on the front wheel side of the bicycle in a state where the bicycle stands upright on the stand. It has been proposed that the front wheel be prevented from turning together with the handlebar even if an unbalanced load is applied to the front wheel.

(Problems to be solved by the invention) However, even if the rotation of the handlebar is locked as described above, the bicycle can be driven in this locked state. When riding a bicycle, the handlebar could not be rotated with respect to the bicycle frame, and the bicycle sometimes fell.

The present invention has been devised in view of the above points, and the purpose is to lock the rotation of the handlebar, but even if the bicycle is forgotten to release the lock, the handlebar can be rotated with respect to the bicycle frame, and It is possible to prevent the friction resistance from remaining when the lock is released.

(Means for Solving the Problems) In the present invention, the locking portion is provided on one of the rotating member (A) that rotates together with the handlebar and the fixed member (B) that supports the rotating member (A). (71) is provided, and on the other hand, a lock body (8) for locking the rotation of the rotating member (A) by engagement with the locking portion (71) and unlocking it by disengagement is provided movably Then, when unlocking, a lock mechanism (C) that allows the rotating member (A) to freely rotate with respect to the fixed member (B) is provided, while the lock body (8) is engaged with the lock mechanism (C). Friction resistance means is provided for enabling the rotating member (A) to rotate with a predetermined friction resistance when the handle bar receives a rotation torque of a predetermined value or more while the engagement portion (71) is locked. .

(Operation) Since the rotation of the handlebar can be prevented by moving the lock body (8) and engaging the lock body (8) with the locking portion (71), the bicycle can be kept upright on the stand. When a heavy object is mounted on the luggage basket mounted on the front wheel side of the bicycle, it is possible to prevent the front wheel from rotating together with the handlebar even if an unbalanced load is applied to the front wheel. The handlebar can be freely rotated together with the rotating member (A) between the provision of the friction resistance means and the engagement of the lock body (8) with the locking portion (71). Immediately engaging the locking part (71) with (8) allows the desired lock,
Even so, the friction resistance means is provided in the lock mechanism so that when the handlebar is subjected to a rotational torque of a predetermined value or more, it can be rotated with a predetermined friction resistance, so that the amount of movement of the lock body is not affected. ,
The handlebar can be freely rotated, and it is possible to effectively prevent frictional resistance from remaining when the lock is released and the handle operation becoming heavy.In addition, when the handlebar is locked, the handlebar is rotated with a torque greater than a predetermined torque. It can rotate, forgetting to unlock the handlebar, and even if you ride the bicycle in a locked state, you can still rotate the handlebar with respect to the bicycle frame, effectively preventing it from tipping over or breaking the lock mechanism. Can be done.

(Example) In the drawings, (1) is a head pipe fixed to the front ends of a top tube (2) and a down tube (not shown),
Reference numeral (3) is a front fork for inserting the upper portion into the head pipe (1), and a pair of ball bearings (41) is provided between the front fork (3) and the upper and lower ends of the head pipe (1). And a pair of bearings (4) consisting of a pair of ball pushers (42) and a large number of balls (43) are provided to rotatably support the front fork (3) on the head pipe (1). There is. Also, (5) is a handle post that holds the handle bar (6) at the upper end and inserts and fixes the lower end into the front fork (3).
The handle post (5), the front fork (3) and the ball push (42) constitute a rotating member (A).
Further, the head pipe (1) and the ball receiver (41) constitute a fixed member (B) that supports the rotating member (A). Further, a split groove (3a) and a screw portion (3b) extending in the axial direction are provided on the upper portion of the front fork (3).

Therefore, in the embodiment shown in FIGS. 1 to 7, the front fork (3) is provided with an annular locking plate (7), and the locking plate (7) is provided with a plurality of locking portions (71). ) Are provided at predetermined intervals in the circumferential direction, and an annular holding piece (44) projecting outward in the radial direction is integrally provided at the upper end of the ball receiver (41). A lock body (8), which locks the rotation of the front fork (3) by engagement with the locking portion (71) and unlocks by engagement and disengagement, is movably provided on the (44). Locking plate (7) having stop (71) and lock body (8)
The lock mechanism (C) allows the rotating member (A) to freely rotate with respect to the fixed member (B) when unlocked.
On the other hand, a lock in which the lock body (8) engages with the engagement portion (71) between the locking body (7) and the front fork (3) in the lock mechanism (C). At this time, friction resistance means (F) is provided for enabling the rotating member (A) to rotate with a predetermined friction resistance when a torque greater than a predetermined value is applied to the handle bar.

In the above structure, the lock body (8) is composed of a shaft member having a large diameter portion (81) on one end side and an annular groove on the other end side, and the other end side is the holding piece (44). A retaining ring (10) is inserted through a retaining hole (45) provided in the front fork (3) so as to move freely in a direction parallel to the center line of the front fork (3).

Then, on the upper end surface of the holding piece (44), the insertion hole (11a) for receiving the lock body (8) and the large diameter portion (81).
A receiving body (11) having a contact portion (11b) that comes into contact with the lock body (8) is provided between the holding piece (44) and the large diameter portion (81). When the lock body (8) is engaged with the locking portion (71) by interposing an urging spring (12) for urging toward the (71), the large diameter portion (81) causes the contact portion ( 11b), and the ball support (4
A long hole (2) for receiving the lock body (8) is provided on the outer periphery of (1).
The operating body (20) having 1) is rotatably supported, the other end side of the lock body (8) is inserted into the elongated hole (21) of the operating body (20), and the operating body (20) is inserted. On both sides of the elongated hole (21) in the hole width direction of the groove (20), cam surfaces (22) inclined in the axial direction toward the circumferential direction are provided, and the lock body (8) is fixed to the cam surface (22). Bushing (1) supporting the ring (10)
3) is brought into contact, and by rotating the operating body (20),
The lock body (8) is moved. That is, at the time of engagement with the locking portion (71) of the lock body (8), the bush (13) of the lock body (8) contacts the lower surface of the cam surface (22), and the lock body (8) The bush (13) of the lock body (8) comes into contact with the higher surface of the cam surface (22) when the engagement portion is disengaged from the locking portion (71). A small step is formed on the lower surface and the higher surface of the cam surface (22) to prevent the operating body (20) from rotating unexpectedly.

The locking plate (7) is rotatably and movably supported on the outer circumference of the upper end of the annular spacer (30) attached to the front fork (3), and the upper end of the spacer (30) is supported. Is provided with a large diameter portion (31) extending outward in the radial direction and facing the upper surface of the locking plate (7), and the large diameter portion (31) and the locking plate (7) are Concavo-convex strips (91) are provided between the opposing surfaces at a predetermined interval in the circumferential direction, and spring supports (14) provided on the lower surface of the locking plate (7) and the lower end of the spacer (30). )
A corrugated pressure spring (15) for urging the locking plate (7) in the direction of the large diameter portion (31) is interposed between the spacer (30) and the locking plate (7). When a predetermined friction resistance is given to the relative rotation with respect to the handle bar (6) and the lock body (8) is engaged with the locking portion (71), the handlebar (6) is rotated against the friction resistance. , The locking plate (7) can be displaced downward against the pressing spring (15) to rotate the handlebar (6) together with the spacer (30) with respect to the locking plate (7). I am trying. Incidentally, although it is not always necessary to provide the uneven strip (91), by providing the uneven strip (91), when the handlebar (6) is rotated against the friction resistance,
The engagement sound can be produced.

In the figure, (16) is a cap.

When it is not necessary to lock the rotation of the handle bar (6) when the bicycle is running, the lock body (8) moves downward as shown in FIG. 7, and the lock portion (8) of the lock body (8) is moved downward. 7
1) is disengaged from. Further, the bush (13) supported by the lock body (8) is in contact with the high surface of the cam surface (22) of the operating body (20).

Then, when a heavy object is loaded on a luggage basket mounted on the front wheel side of the bicycle in a state where the bicycle stands upright, the operating body (20) is rotatably operated to lock the lock body (8). It engages with (71) to lock the rotation of the handlebar (6). That is, when the operating body (20) is rotated, the operating body (2) of the bush (13) supported by the lock body (8) is
The engagement position with the cam surface (22) in (0) is displaced to the lower surface side of the cam surface, and the lock body (8) has the locking portion (71).
, The rotation of the locking plate (7) is blocked, and the rotation of the handlebar (6) can be locked.

This lock only locks the rotation of the handlebar (6), not the rotation of the wheels,
Although the bicycle can run with the rotation of the handlebar (6) locked, the bicycle can be rotated by engaging the spacer (30) rotating with the handlebar (6) and the lock body (8). Between the locking plate (7) to be blocked, when the lock bar (8) engages with the engaging portion (71), and when a torque greater than a predetermined value acts on the handlebar, Since the friction resistance means (F) that allows the rotating member (A) to rotate with a predetermined friction resistance is provided, a rotation operation that exceeds the friction resistance given to the handlebar (6) by the friction resistance means (F). By applying a force, the handle bar (6) can be rotated with respect to the locking plate (7) which is prevented from rotating. Therefore, it is possible to prevent the bicycle from toppling over, and the driver can handle the handlebar (6).
The rotation lock of the handlebar (6) can be released by noticing that the rotation of the handlebar is locked.

This unlocking can be performed by rotating the operating body (20). That is, the operating body (2
The bush (1) supported by the lock body (8) by the rotation of (0)
The engagement position of the operation body (20) with the cam surface (22) of 3) is displaced to the higher surface side of the cam surface, and the lock body (8) is
Moves downward and disengages from the engaging portion (71), so that the handlebar (6) can rotate freely.

In the embodiment described above, the locking plate (7) having the locking portion (71) is rotatably supported by the spacer (30) attached to the front fork (3). Although friction resistance means (F) is provided between (7) and the spacer (30), the locking plate (7) may be replaced by the spacer (7) as shown in the embodiment of FIG. The friction resistance means (F) may be formed integrally with the locking portion (71) and the lock body (8), and the friction resistance means (F) may be provided. The formation position of F) is not particularly limited. The friction resistance means (F) shown in FIG. 8 has a locking portion (71) of the lock body (8).
This lock body (8) is formed by forming an engaging portion with the arc shape.
Is pressed against the locking portion (71) by the force of the pressing spring (15a),
The rotation of the handlebar is prevented, and the locking plate (7) is rotated with respect to the lock body (8) with a rotation torque of a predetermined or more of the handlebar.

As described above, according to the present invention, since the rotation of the handlebar can be locked and unlocked, the weight of the luggage basket attached to the front wheel side of the bicycle when the bicycle is upright on the stand is reduced. When an object is mounted, it is possible to prevent the front wheel from turning together with the handle bar even if an unbalanced load is applied to the front wheel, and moreover, the locking portion (71) and the locking portion (71) are A lock body (8) that locks the rotation of the rotary member (A) by engagement and unlocks by engagement and disengagement is movably provided, and when the lock is released, the rotary member (A) is fixed to the fixed member (B). A lock mechanism (C) that allows free rotation is provided to the handlebar when the lock body (8) is locked when the lock body (8) engages with the engagement portion (71). The rotating member (A) when the rotating torque of Since the friction resistance means is provided to enable the rotation of the lock body with a predetermined friction resistance, the lock body (8)
The handlebar can be freely rotated together with the rotating member (A) until the locking part (71) is engaged with the locking part (71), and the lock body (8) is engaged with the locking part (71). Immediately after this, the desired lock can be made, and yet, the friction resistance means is provided in the lock mechanism so that when the handlebar is applied with a rotational torque of a predetermined value or more, the handlebar can be rotated with a predetermined friction resistance. The handlebar can be rotated freely without affecting the movement amount of the lock body, which effectively prevents friction resistance from remaining when the lock is released and the handle operation becoming heavy. The handlebar can be rotated with a torque greater than the specified value, and even if you forget to unlock the handlebar and ride the bicycle, keep the handlebar in place. It can be rotated with respect to the bicycle frame, preventing the bicycle from falling over.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the device of the present invention, FIG. 2 is an enlarged sectional view of an essential part, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. FIG. 5 is an enlarged bottom view, FIG. 5 is a sectional view taken along line VV in FIG. 4, FIG. 6 is a perspective view with the same portion omitted, FIG. 7 is a sectional view showing an unlocked state, and FIG. 8 shows another embodiment. FIG. (1) …… Lock body (71) …… Locking part (9) …… Sliding mechanism (A) …… Rotating member (B) …… Fixing member

Claims (1)

[Scope of utility model registration request] 1. A rotating member (A) which rotates together with a handlebar, and a fixed member (B) which supports the rotating member (A).
And a lock body that locks the rotation of the rotating member (A) by engagement with the lock portion (71) and unlocks the lock member by disengagement. (8) is provided so as to be movable, and at the time of unlocking, a lock mechanism (C) that allows the rotating member (A) to freely rotate with respect to the fixed member (B) is provided, while the lock mechanism (C) is When the lock body (8) is locked to engage with the engagement portion (71) and when a torque greater than a predetermined value is applied to the handlebar, the rotating member (A) can be rotated with a predetermined friction resistance. A handlebar control mechanism for a bicycle, comprising a friction resistance means.