JPH0572307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotation operating device, particularly to an operating device for a height or angle adjustment device of a seat in an automobile or the like.

[Conventional technology]

For example, in the driver's seat of a car, the physique of the driver,
There are some that allow you to change the sitting height or sitting angle by adjusting the height or angle according to your preference.

In the known automobile seat constructed in this way, the hinge arms provided at the front and rear of the seat frame are pivotally supported by the legs fixed to the seat adjuster arranged on the vehicle floor side, and the turning action is performed on the hinge arms. The seat frame is raised and lowered by movement, and the height is adjusted by operatively connecting an operating device to the hinge arm and operating the operating device. A friction brake device is employed as a locking mechanism to disable operation.

This friction brake device was developed in Japanese Patent Application Laid-Open No. 59-
There is something disclosed in No. 29827. In other words, this device includes a brake drum fixed to the seat frame, a lever plate fixed to a drive shaft supported by a center hole in the bottom wall of the drum, and a lever plate fitted to the drive shaft so as to be rotatable relative to the drive shaft. A hanger is fixed to the seat by means of serrations, a handle is fixed to the drive shaft, and a connecting member of the seat lifting mechanism is attached to the driven shaft. A pair of guides is arranged between the lever plate and the hanger, and these guides are connected to both ends of a brake spring that is pressed against the inner peripheral surface of the brake drum. It has a contact part that stops the movement of the lever plate, and a cam part that engages with the lever plate when the lever plate rotates.At the beginning of the rotation of the lever plate, the cam part is swung by the engagement between the cam part and the lever plate, and the hanger is rotated. When the contact is released, a gap is formed between the brake spring and the hanger, and this gap reduces the diameter of the braking spring, weakening the pressing force against the inner peripheral surface of the brake drum, releasing the friction brake, and pressing the driven shaft. It is designed so that it can be rotated.

[Problem that the invention seeks to solve]

In this brake system, the driven shaft is frictionally locked by the braking spring coming into contact with the inner peripheral surface of the brake drum, so a large downward load, such as when an impact is applied to the seat, acts on the driven shaft and causes it to rotate. If force is applied, there is a risk that the brake spring will slide inside the brake drum and the seat will be lowered below the set height.Also, braking is performed by expanding and contracting the winding diameter of the brake spring, so the seat can be lowered to the desired height. It was difficult to lock the device accurately. Furthermore, during operation, a so-called dragging phenomenon occurs in which the braking spring slides against the inner circumferential surface of the brake drum, making the operation difficult.

In view of the above, the present invention has a structure in which the driven shaft is locked by gear meshing, and the unlocking is performed by extending and sliding the handle, thereby ensuring that the seat height adjustment device etc. that are linked to the driven shaft are properly adjusted. It is an object of the present invention to provide a rotation operation device that can be locked and smoothly unlocked and rotated.

[Means for solving problems]

In order to solve the above technical problem, the present invention fixes a gear 21 to a frame coaxially with the driven shaft 3 via a mounting bracket 22, and attaches a base bracket 2 to the driven shaft 3 in correspondence with the gear 21. A lock gear 6, which meshes with the fixed gear 21, is rotatably attached to the inner surface of the base bracket 2 at a location distant from the insertion portion of the driven shaft 3, and a guide bracket is inserted and fixed to the outer surface of the base bracket 2. A pin 8 is coaxially rotatably attached to the insertion portion of the driven shaft 3 and protrudes from the lock gear 6.
The base bracket 2 is provided with a slidable handle 4, and a sliding member 13 is attached to the handle 4.
At the same time as attaching the cam surface 1 to the guide bracket 7.
A handle 4 and a guide bracket 7 are provided.
These are configured to interlock with each other via the sliding member 13 and the cam surface 12a.

[Effect]

The above technical means works as follows.

When the handle 4 is housed in the base bracket 2, the lock gear 6 is engaged with the fixed gear 21, and the base bracket 2 is locked with respect to the fixed gear 21, that is, the driven shaft 3 is locked with respect to the frame.

When the handle 4 is slid in this state, the guide bracket 7 is rotated via the sliding member 13 as a connecting member and the cam surface 12a, so that the lock gear 6 is rotated through the pin 8 that engages with the deformed elongated hole 9 of the guide bracket 7. The driven shaft 3 is rotated in a direction away from the lock gear 6 through the lock gear 6 to release the lock, and in this state, by grasping the extended and sliding handle 4 and pulling it up or pushing it down, the driven shaft 3 is integrated with the base bracket 2. The adjustment mechanism connected thereto is driven.

〔Example〕

Embodiments of the present invention will be specifically described with reference to the drawings.

1 to 4 show an embodiment of the rotation operating device according to the present invention, FIG. 5 shows an automobile seat using the rotation operating device as a height adjustment device, and FIG. The figure shows the state in which the rotation operating device is attached to the cushion frame of the same seat.

The rotation operation device 1 shown in FIGS. 1 to 4 consists of a rotation side member and a fixed side member, and 2 is a movable side member fixed to a driven shaft 3 connected to a height adjustment device described later, for example. This base bracket 2 is formed into a box shape with an edge frame integrally formed on the outer periphery, and a guide cylinder part 2a is provided on the upper edge to telescope the outer cylinder 4a and the inner cylinder 4b. A handle 4, which is connected to each other in a similar manner, is accommodated in an expandable and retractable manner, and a bush 5 is fixedly fixed to the driven shaft 3 through serrations in the substantially central portion thereof. A lock gear 6 that meshes with a fixed gear, which will be described later, is pivotally attached to the inner surface of the base bracket 2 at a part separated from the fixed part to the driven shaft 3, and a guide bracket that engages with the lock gear 6 is attached to the outer surface of the base bracket 2. 7 is rotatably arranged around the bush 5. The engagement between the lock gear 6 and the guide bracket 7 is such that a pin 8 protruding from the lock gear 6 is inserted into a deformed elongated hole 9 formed in the guide bracket 7 through a guide hole 10 formed in the base bracket 2. A roller pin 11 is protruded from the tip of the guide bracket 7 and slides along the outer edge of the lock gear 6, that is, the side edge facing the meshing portion as the guide bracket 7 rotates. It is done like this.

A cam piece 12 is formed protruding from the upper edge of the guide bracket 7, and a sliding member 13 attached to the outer cylinder 4a of the handle 4 slides on this cam piece 12. This sliding contact member 13 is connected to the outer cylinder 4 of the handle 4.
The roller 15 is supported by a pin 16 in a cantilevered manner on a bracket 14 fixed to the base bracket 2. The roller 15 is projected into the bracket 2, and the roller 15 is attached to the lower cam surface 1 of the cam piece 12 of the guide bracket 7.
It is transferred to 2a.

Further, the guide bracket 7 has a spring 18 stretched between a raised piece 7a protruding from the approximate center thereof and the lower edge of the base bracket 2, so as to constantly rotate the lock gear 6 in the direction of a fixed gear, which will be described later. The inner cylinder 4 is biased so that the handle 4 is always stored in the guide cylinder part 2a of the base bracket 2.
A spring 19 is stretched between the tip of the guide tube 2a and the rear end of the guide tube 2a.

Reference numeral 21 denotes a fixed gear as a fixed side member, which is fixed coaxially with the above-mentioned driven shaft 3 via a mounting bracket 22 to a fixed body such as a cushion frame.
That is, an insertion hole 21a for the driven shaft 3 is formed in the center of the fixed gear 21, and an insertion hole 22a is also formed in the mounting bracket 22.
2a are aligned, the fixed gear 21 and the bracket 22 are coupled with a rivet 23, and the mounting bracket 22 is fixed to the fixed body.

Next, we will explain the operation of the rotary operating device 1 which consists of the movable side member and the fixed side member as described above. The attached bracket 14 as a sliding contact member is in the retracted position, and the roller 15 pivoted thereon is rolled into contact with the cam surface 12a of the cam piece 12 of the guide bracket 7 at its rear end, that is, on the shaft support side of the guide bracket 7. Therefore, the guide bracket 7 is rotationally biased downward by the spring 18, and the lock gear 6, which is engaged with the guide bracket 7 through the pin 8, is pushed by the roller pin 11 being rolled into contact with the outer edge side of the tip. In this state, the base bracket 2 is meshed with a fixed gear 21 as a fixed side member (the state shown in FIG. 1), the base bracket 2 cannot rotate, and the driven shaft 3 is in a locked state.

When the bracket 14 is moved forward by pulling out the handle 4 from this state, the roller 15 rolls forward along the cam surface 12a of the cam piece 12 of the guide bracket 7 and is pulled up against the cam piece 12. As a result, the guide bracket 7 is rotated upward against the biasing force of the spring 18 with the shaft supported by the bush 5 as the center of rotation, and the pin 8 of the lock gear 6 is moved into the deformed elongated hole 9. By being pushed by the edge, it is rotated backward, that is, in a direction away from the fixed gear 21, and the mesh with the fixed gear 21 is released, and the driven shaft 3 is unlocked (see FIG. 3).

In this state, by pulling up or pushing down the pulled out handle 4 while grasping it, the driven shaft 3 is rotated via the base bracket 2, and the adjustment mechanism connected to the driven shaft 3 is actuated.

When the user releases the handle 4 after rotating the driven shaft 3 by a desired amount in this manner, the handle 4 is contracted by the biasing force of the spring 19 and is housed in the guide tube 2a. That is, while the inner cylinder 4b is inserted into the outer cylinder 4a, the outer cylinder 4a is inserted and stored in the guide cylinder part 2a, and by this operation, the bracket 14
moves backward, the roller 15 rolls backward on the cam surface 12a of the cam piece 12 of the guide bracket 7, and the cam piece 12 is released from being pulled up.
Therefore, the guide bracket 7 is rotated downwardly by the biasing force of the spring 18, and the lock gear 6 is accordingly rotated forward by the engagement between the pin 8 and the elongated hole 9 and meshed with the gear 21, so that the driven shaft 3 is rotated. Locked in the aforementioned pivoted position, the adjustment mechanism is held in its activated state (see FIG. 4).

To further change from this operating state or return to the original state, the above-described unlocking and rotation operations of the driven shaft 3 are performed.

In the above configuration, the sliding member 13 that is attached to the handle 4 and that slides into contact with the cam surface of the guide bracket 7 has a roller 15 that is pivotally supported on the bracket 14, and the roller 15 is attached to the cam piece 12 of the guide bracket 7. Lock gear 6 is in rolling and sliding contact with
During the lock release operation, the guide bracket 7
The handle 4 can be pulled out and slid smoothly to rotate the handle 4, and the sliding force of the handle 4 is such that the roller 15 moves in the front direction of the cam piece 12, that is, in the direction away from the shaft support of the guide bracket 7. It becomes lighter because it moves. On the other hand, the tensile force of the spring 18 acts strongly on the guide bracket 7 in the opposite direction to the direction in which it is rotated by the movement of the roller 15, and therefore, the increase in this tensile force and the decrease in the sliding force described above are caused. As a result, the sliding force for pulling out the handle 4 and the instantaneous operation force are always constant.

Further, in the retracting operation of the handle 4, that is, the locking operation of the lock gear 6, the rotation force of the spring 18 of the guide bracket 7 is added to the retracting force of the spring 19 of the handle 4 via the roller 15, and the handle 4 is quickly retracted. At the same time, the guide bracket 7 is also rotated back, and the lock gear 6 meshes with the fixed gear 21, which is the fixed side member, and the base bracket 2, which is fixed to the driven shaft 3, is locked again to the fixed body. .

In the above embodiment, the handle 4 is configured as a two-stage telescopic type with an outer cylinder 4a and an inner cylinder 4b, but it may also be configured as a telescopic type with two or more stages. In the case of this one-piece structure, the handle pullout length and the moving length of the bracket 14 as the sliding member 13 that operates the guide bracket 7 are the same, and therefore the mechanism The upper handle drawer length is shorter than that of the telescopic type. Also,
The sliding contact member 13 is the bracket 14 as described above.
In addition to the configuration in which the roller 15 is pivotally supported, a configuration in which the bracket 14 is brought into direct sliding contact with the cam piece 12 of the guide bracket 7 without using the roller 15 can be operated in the same manner as described above. Note that the cam piece 12 of the guide bracket 7 may be formed on the lower edge side.

Furthermore, the positional relationship of the lock gear 6 and the guide bracket 7 with respect to the fixed gear 21 may be reversed, that is, they may be located on the front side, and the teeth of the fixed gear 21 may correspond to the rotation range of the driven shaft 3 without being provided on the entire circumference. Just set it up. Other members are not limited to the embodiments, and can be implemented in various ways.

Next, a case in which the rotary operating device 1 constructed and operated as described above is used as an operating device for a lifter mechanism of a car seat, for example, will be described with reference to FIGS. 5 and 6.

FIG. 5 shows the entirety of an automobile seat equipped with the above-mentioned rotary operating device 1, and this seat 31 is attached to the vehicle body floor via a slide rail 32 of a seat adjuster.

The seat cushion 31a has a built-in lifter mechanism R described later, which is connected to the rotation operating device 1 described above.
By operating the seat cushion 31a, the seat cushion 31a is raised and lowered with respect to the slide rail 32, and the height of the seat cushion 31a is adjusted.

FIG. 6 shows how the lifter mechanism R is attached to the seat cushion 31a, that is, the cushion frame 33, and each member of the lifter mechanism R is disposed between the front and rear of the cushion frame 33 and the slide rail 32. . That is, the front member of the lifter mechanism R has a lifter operating shaft 34 horizontally mounted on the front part of the cushion frame 33 so as to be rotatable, and both ends of the lifter operating shaft 34 are mounted on bearings provided at the front part of both sides of the cushion frame 33. 35, and an arm 36 is fixed to this lifter operating shaft 34 at the inside of both sides of the frame, and the free end of this arm 36 is pivotally connected to a leg 37. . The leg body 37 is fixed to the vehicle floor side, in this example, to the upper rail 32a of the slide rail 32 by a fixing member such as a bolt or nut.

The rear member of the lifter mechanism R is constructed by pivoting an arm 38 on the inner rear side of both sides of the cushion frame 33, and pivoting the free end of this arm 38 to a leg 39. 39 is also fixed to the vehicle floor side, in this example, to the rear of the upper rail 32a by a fixing member. Note that the legs 37 and 39 are fixed to the upper rail 32a by connecting the fixing point of the front arm 36 to the lifter operating shaft 34, that is, the straight line connecting the pivot point to the cushion frame side and the pivot point to the leg body 37, and the rear arm 38. This is done so that the straight line connecting the pivot point to the cushion frame side and the pivot point to the leg body 39 are parallel.

Both ends of a connecting link 40 are pivotally attached to the front and rear members of the lifter mechanism R, that is, approximately in the middle between one arm on the front side and one arm on the rear side, and the lifter operating shaft 34 is equipped with a torsion coil spring. 41 is wound, and one end 41a thereof is locked to a knock pin 42 protruding from the operating shaft 34.
The other end 41b is locked to a retainer 43 protruding from one side of the cushion frame 33 so that the arm 36 is connected to the lifter operating shaft 34 and rotates in the upright direction about the pivot point to the leg 37. It imparts bias. The rotation of the arm 36 is transmitted to the rear arm 38 via the connecting link 40, and this arm 38 is also rotated in the upright direction around the pivot point to the leg body 39, so that the cushion frame 33 is moved to the slide rail. 32, it is always biased in the upward direction.

As an operating device for the lifter mechanism R that biases the cushion frame 33 in the upward direction, the above-mentioned rotation operating device 1 is mounted on the outer surface of one side of the cushion frame 33 corresponding to the end of the lifter operating shaft. do.

That is, with the end of the driven shaft 3 protruding from the insertion hole of the mounting bracket 22 to which the fixed gear 21 is fixed connected to the lifter operating shaft 34 by serrations, a bolt is attached to the outer surface of the frame 33.
It is fixed with a fixing member 44 such as a nut.

As described above, by operating the rotation operating device 1 attached to the lifter mechanism R, the lifter mechanism R is activated and locked, and the height of the cushion frame 33 can be variably adjusted.

That is, the rotation operating device 1 is connected to the handle 4 as described above.
When the lock gear 6 is separated from the fixed gear 21 and the driven shaft 3 is unlocked by the pull-out operation, the lifter mechanism R moves upward due to its biasing force, lifts up the cushion frame 33, and lifts the handle 4 at the desired height. By contracting the lock gear 6, the lock gear 6 meshes with the fixed gear 21, the driven shaft 3 is locked, and the cushion frame 33 is held fixed at that height. In this way, the height of the seat 31 can be variably adjusted as desired.

In addition, in the lifter mechanism R described above, a tilt mechanism is constructed by removing the rear arm 38 and the connecting link 40 and directly pivoting the rear part of the cushion frame 33 to the rear leg body 39. By rotating the operating shaft 34, the height of only the front side of the cushion frame 33, that is, the inclination angle of the seat cushion 31a can be adjusted.

Further, the lifter mechanism and tilt mechanism to which the rotation operating device according to the present invention is applied are not limited to the above-mentioned ones, but may be a mechanism equipped with an operating axis that is always rotationally biased in one direction by a biasing means. Good to have.

〔Effect of the invention〕

As described above, according to the present invention, the driven shaft connected to the adjustment mechanism is locked by the engagement between the fixed gear and the lock gear, so that it is accurately locked at the desired rotational position and an impact load is applied to the driven side. It is securely held in that position without wobbling or slipping, and the lock release operation is performed by sliding the guide bracket that engages the lock gear by sliding the handle, and sliding the sliding member on the cam surface of the guide bracket. Since it is performed by rotating, the operation can be performed extremely smoothly, and after this lock is released, no resistance is applied to the driven shaft, reducing the operating force, making it possible to rotate the driven side. It can be carried out smoothly, has a simple structure, has a small number of parts, and has the advantage of being able to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional external view of an embodiment of the rotation operating device according to the present invention, FIG. 2 is an exploded perspective view of the device shown in FIG. 1, and FIGS. 3 and 4 are operations of the device shown in FIG. 1. FIG. 5 is a side view of an automobile seat equipped with a rotation operating device according to the present invention; FIG.
This figure is a partially exploded perspective view of the cushion frame portion of the seat shown in FIG. 5. In the figure, 2 is the base bracket, 3 is the driven shaft, and 4 is the base bracket.
is a handle, 4a is an outer cylinder, 4b is an inner cylinder, 6 is a lock gear, 7 is a guide bracket, 8 is a pin, 9 is an elongated hole, 12 is a cam piece, 12a is a cam surface, 13 is a sliding contact member, 14 is a bracket , 15 is a roller, 21
2 is a fixed gear, 22 is a mounting bracket, and 33 is a cushion frame as a fixed member.

Claims (1)

[Claims] 1. A base bracket fixed to a driven shaft that is rotatably supported by a fixed side member, a lock gear that meshes with a fixed gear fixed to the frame, and a guide that moves the lock gear toward and away from the fixed gear. The guide bracket is rotatably provided with a handle and a handle is slidably provided, the guide bracket is provided with a cam surface, and the handle is provided with a sliding member that makes sliding contact with the cam surface, and the above-mentioned effect due to the sliding of the handle is provided. The guide bracket is rotated by sliding contact of the sliding member with the cam surface, the lock gear is separated from the fixed gear to release the lock, and the driven shaft is rotated via the base bracket. A rotation operating device characterized by: