JPH0357157Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a gear type locking device that locks rotation by meshing three gears and enables transmission of rotation by disengaging one of the gears from the meshing position. Regarding.

For automobile wind regulators, etc.
A friction type locking device was installed that utilized the frictional force of a spring, and the rotational force of the operating lever unlocked the window glass and provided the output for raising and lowering the window glass. Such a device has the advantage of having a simple structure and being able to lock in any position steplessly, but due to the structure, there is a certain amount of play in the locking part, causing rattling and repeated changes in the locking direction. The drawback was that the lock position moved when the lock was turned. Furthermore, a gear type lock device that locks by engaging a gear and a ratchet is used, for example, in a reclining adjuster for a car seat, etc., but such a gear type lock device does not require the operating force of the operating lever to lock the seat. It is used only for the release action, and is not used to convert the movement force of the gear. Therefore, it has the disadvantage that another force must be applied to recline the seat.

The present invention is used as an adjustment device for each part of an automobile seat, and is a lock that can be unlocked by rotating the operation shaft, and after the lock is released, the rotational force of the operation shaft can be transmitted to the driven side. A device is provided which overcomes the above-mentioned drawbacks.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, 1 is a large-diameter driven gear;
It is fixed to one side of the set plate 8 by rivets 15, 15, . . . . The driven gear 1 rotates integrally with the driven shaft 11 by welding the tip of the driven shaft 11 rotatably through the fixed bracket 4 to the set plate 8. Here, fixed bracket 4
In the case of a wind regulator, it is fixed to the door of the automobile, and in the case of a reclining device, it is fixed to the seat frame, and the driven shaft 11 is used to raise and lower the window glass and tilt the seat back. The driving force is transmitted to each member. Therefore, a gear 11a for transmitting driving force is provided around the base end of the driven shaft 11. Three mutually meshing lock gears 2, 2', 2'' mesh with the driven gear 1, which is integrated with the driven shaft 11.Among them, the center lock gear 2' is always connected to the driven gear 1. The rotation center shafts 14 of the lock gears 2 and 2'', located above and below, are inserted through the fixed bracket 4 so as to mesh with the lock gears 2 and 2''. It is inserted into the holes 4a, 4a'', and by sliding in the elongated holes 4a, 4a'', the upper and lower lock gears are disengaged from meshing with the center lock gear 2' and the large-diameter driven gear 1. ing. Furthermore, this upper and lower lock gear 2, 2''
At the tips of the rotation center shafts 13, 13, there are engaging pieces 6, which move the lock gears 2, 2'' in the anti-meshing direction.
7 is caulked with a spacer 19 and a flat washer 20. In both of these engaging pieces 6 and 7, the rotation center shaft 14 of the center lock gear 2' is inserted into the holes 6a and 7a in the center, and the engagement pieces 6 and 7 swing left and right about this rotation center shaft 14, and move up and down. The rotation center shafts 13, 13 of the lock gears 2 and 2'' are slid, and this slide moves the upper and lower lock gears 2 and 2'' in the anti-meshing direction. or,
Both ends of a coil spring 18 are hooked to one ends 6b and 7b of the engaging pieces 6 and 7, and the force of this spring 18 causes the upper and lower lock gears 2 and 2'' to be locked to the central lock gear 2' and 7b. It is energized in the direction of meshing with the driven gear 1.The above-mentioned swinging of the engaging pieces 6 and 7 is achieved by the engaging portions 6c and 7c at the other end coming into contact with an operating shaft 12, which will be described later. Next, the operating shaft 12 is attached to the fixed bracket 4.
The operating gear 3 is integrally attached to the base end of the operating shaft 12 and always meshes with the central lock gear 2'. It is designed to transmit rotation to. This operating shaft 12 is welded to the fixed bracket 4 and also passes through the elongated hole 5a of the support bracket 5 which protrudes to the side of the bracket 4 to ensure stable sliding. This actuates the engaging portions 6c and 7c of the engaging pieces 6 and 7 to swing the engaging pieces 6 and 7. Therefore, the engaging portions 6c and 7c of the engaging pieces 6 and 7 are attached so as to sandwich the operating shaft 12 from above and below. Further, the working gear 3 is integrally attached to the working shaft 12.
The operating shaft 12 is slidably engaged with the central lock gear 2' for a predetermined amount of rotation, so that the operating shaft 12 is connected to the connecting arms 9 and 10 attached to the fixed bracket 4 and the support bracket 5, respectively. is locked. Furthermore, the action axis 1
An operating dial 16 protruding from the support bracket 5 is fixed to the tip end of the support bracket 5 by a clip 17. The driven gear 1, the lock gears 2, 2', 2'' and the engagement pieces 6, 7 are all assembled so as to be housed in the hollow portions of the support bracket 5 and the fixed bracket 4.

Next, the operation of the gear type lock device constructed as described above will be explained with reference to FIGS. 2 to 4.

2 and 3 show the locked state of the driven shaft 11, and FIG. 4 shows the unlocked state.
In FIG. 2, when an external force in the direction of arrow A acts on the driven shaft 11, a rotational force in the same direction also acts on the driven gear 1, which is integrated with the driven shaft 11, and as a result, each lock gear 2, 2', 2'' On the other hand, the rotational force in the direction of arrow a of the central lock gear 2', to which the central rotation shaft 14 is attached at a fixed position, acts on the upper and lower lock gears 2, respectively.
and 2'' are transmitted with the rotational force in the directions of arrows b and d. Therefore, the lower lock gear 2'' receives the rotational force e
The resultant force of rotational forces b and d causes the gear to be pushed outward as indicated by arrow B, and attempts to disengage from the driven gear 1 and the center lock gear 2'. It is energized in the direction of meshing with the center lock gear 2'. The meshing of these three gears prevents the driven gear 1 from rotating, and the driven shaft 11 is firmly locked.

Next, as shown in Fig. 3, mark the driven shaft 11 with an arrow.
Even when a rotational force is applied in the A' direction, the rotational force in the direction of arrow a' is applied to the center lock gear 2', as in Fig. 2, and the rotational force in the direction of arrow a' is applied to the upper and lower lock gears 2 and 2'' in the directions of arrows c' and e'. The rotational force is transmitted from the center lock gear 2' to the upper and lower lock gears 2 and 2''.
Rotational forces in the b' and d' directions are transmitted. As a result, the upper lock gear 2 moves in the direction of arrow B' and attempts to disengage from the meshing position. The lower lock gear 2'' is energized in the meshing direction, and the driven gear 1,
The rotation of the driven shaft 11 is locked in the same manner as described above by the engagement of the three lock gears 2' and 2''.

On the other hand, when the dial 16 is rotated in the direction of arrow A, a rotational force in the same direction is transmitted to the operating shaft 12 and the operating gear 3, as shown in FIG. As a result, the operating gear 3 moves in the direction of arrow A on the circumference of the central lock gear 2' while meshing with the gear 2', and the operating shaft 12 moves toward the engaging portion 7c of the engaging piece 7.
The engaging piece 7 swings clockwise around the central rotation shaft 14 of the central lock gear 2' to move the lower lock gear 2'' in the direction of arrow c and release it from the engaged position. On the other hand, the amount of movement of the operating gear 3 is determined by the elongated hole 4 of the fixed bracket 4.
In order to stop in the range b, at the stopped position, the rotational force in the direction of arrow a rotates the central lock gear 2' in the direction of arrow b, and this rotation applies rotational force to the driven gear 1 in the direction of arrow e, and Upper lock gear 2
The rotational force in the direction of arrow c is transmitted to. Furthermore, since the rotational force in the direction of arrow d is transmitted from the driven gear 1 to the upper lock gear 2, the upper lock gear 2 moves in the direction of arrow B by the resultant force of the rotational forces c and d, and is disengaged from the meshing position. Therefore, the meshing state of the three gears is released and the locked state is released, the driven gear 1 is rotated in the direction of arrow e, and the driven shaft 11 is rotated in the same direction. When the dial 16 is rotated in the opposite direction to that shown in FIG. 4, the upper and lower lock gears 2,
2'', the driven shaft 11 can be rotated in the opposite direction as described above. Therefore, according to the present invention described above, the driven shaft 11 can be rotated simply by rotating the dial. It is possible to release the lock and transmit the rotation, and the direction of rotation can also be changed simply by changing the operating direction of the dial.On the other hand, even if an external force is applied to the driven shaft, the meshing of the three gears ensures In addition to being able to lock, the structure utilizes gear meshing, so there is little play.
No more wobbling when operating. Furthermore, the operating force can be adjusted by changing the gear ratio between the driven gear and the operating gear, and adjustment according to the members used is also easy.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
4 through 4 are explanatory diagrams of the operation. 1... Driven gear, 2, 2', 2''... Lock gear, 3... Working gear, 4... Fixed bracket,
6, 7... Engaging piece, 11... Driven shaft, 12... Working shaft, 13, 14... Rotation center shaft, 18... Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A driven shaft rotatably inserted into a fixed bracket, a driven gear integrally attached to this driven shaft, a central lock gear meshing with this driven gear, and a central lock gear disposed above and below the central lock gear. three lock gears consisting of an upper lock gear and a lower lock gear, which mesh with the central lock gear and the driven gear and are mounted so as to be separable from the driven gear, and an operating gear which meshes with the central lock gear are integrally installed and actuated. an operating shaft that is attached to swing by rotating a gear; and each of the upper and lower lock gears is rotatably attached to one end, the other end is locked to the operating shaft, and the operating shaft is two engaging pieces that move the upper or lower lock gear in the anti-meshing direction of the driven gear by swinging; A gear type locking device characterized by comprising a biasing spring.