JPS58127620A - Front and rear position adjustable headrest - 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] Regarding the formula belly button rest.

Various types of headrests of this kind have been proposed in the past, but all of them have the drawback of complex structures and inability to adjust the position easily, quickly, and reliably in the longitudinal direction.

An object of the present invention is to provide a front-rear position adjustable headrest that can be adjusted simply, quickly, and reliably in the front-rear direction, and that can be constructed simply with fewer parts. It's obvious that there will be a lot of trouble.

1 to 3 show an embodiment of the present invention, including a fixed plate 2, a movable plate 5, a hollow housing 8, a rotating shaft 10, and a mechanism for converting linear motion into rotational motion. A rack Ila provided on the movable plate 5 constituting the
llb and the pinion +2a, 12 provided on the rotating shaft 1o.
b. The headrest body 15 is configured to include a coil spring 13 for locking the rotation '141110, an operating lever 14 for this, and a headrest body 15 attached to the movable plate 5.

Channel-shaped guide rails 3a and 3b are formed at both ends of the fixed plate 2 in the width direction, and a guide hole 4 for the operating lever +11'l is provided in the middle part. A stay Ia that is inserted into and connected to a one-note banokhu 1/- person (not shown) in one of the two fixed notebooks 1-2.

It is fixed between the upper ends of 1b.

The movable brackets 1/-1 and 5 have a mouth-shaped intermediate portion, and guide portions 6a and 6b that fit into the guide rails 3a and 3b formed in the fixed plate (2) are provided at both ends thereof. and ranks on both sides of the middle part] 1.
a, IIb are formed. The movable plate 5 is disposed on the fixed plate 2'' and is movable in parallel in the front-rear direction via guide portions 6a and 6b fitted to the guide rails 3a and 3b. It is being In addition, in Fig. 1, the movable pulley l/-1
The forward direction of -5 is indicated by arrow f.

Tension springs 7a and 7b are cut out on both sides of the intermediate portion between the fixed plate 1-2 and the movable plate 5, and the tension springs 7a and 7b are provided in 111. 7b, it is constantly urged forward.

The housing 8 includes a rotating shaft 10 and a coil spring 1.
3 is formed in a hollow shape, and holes for hooking the ends of the coil springs 13 are provided at both ends in the axial direction.
A guide hole 9 for an operating lever is provided on the bottom side. Further, the housing 8 is arranged to be long in the width direction and is fixed to the medium heat section of the fixed plate 2''.

The rotating shaft 10 is inserted into the maggot puffer fish 8, and is placed on guide rails 3a and 3bu formed at both ends (d) of the fixed bracket 1/-1-2.The rotating shaft 1
0, that is, the housing 8 and the guide 1/
- pinion j 2 a in the part between the wheels 3a and 3b
, l 2 b are provided.

A rack 11a provided on the movable plate 5.

11b and a binion 12a provided on the rotating shaft 10.

+2b are engaged with each other, and these rack binions 11a are engaged with each other when the rotating shaft 10 is unlocked.

11b Through the operation of threats 12a and 12b, the movable play 1-
5k It is designed to be able to move forward and backward.

The coil spring] 3 is connected to the rotating shaft 1 in this embodiment.
0, and both ends 13a.

13b is hooked into folding holes provided at both ends of the housing 8, and is contracted in the diametrical direction to close the rotating shaft 1.
0 and locks the rotating shaft 10. Also, the winding direction of the coil spring 1:3 is in the direction of pushing the movable plate 5 from the rear to the front. When a load is applied, it works to unlock the rotating shaft 10, and on the other hand, when a load that pushes from the front to the rear is applied, it strengthens the lock against the rotating shaft 10. .

The operating lever I4 is provided at the middle part in the length direction of the coil spring 13, and is connected to the housing 8 and the fixed bracket.
/-) 2 so as to be operated from the outside through a guide hole 9.4 provided in the operating lever 14.
By operating the coil spring I3 in the opposite direction to the winding direction of the coil spring 130, that is, in the direction of the arrow g shown in FIGS.
0 is now unlocked.

The headrest body 5 is attached to the movable plate 5 by passing the screw 18 through the mounting hole 16 provided in the headrest body 15 itself and screwing it into the screw hole 17 provided in the movable plate I/-1-5. Being singled out.

The longitudinally adjustable headrest of the above embodiment is operated and functions as follows.

In a normal state, the rotating shaft 10 is locked from rotating due to the contraction action of the coil spring 13 in the diametrical direction, and the pinions 12a, 12b provided on the rotating shaft 10 and the racks 13a, T3b provided on the movable plate 5 are locked. can be actuated, so that the movable plate 5 with the headrest body 15 is fixed in position.

In this state of use, when a load is applied in the direction of pushing the headrest main body 15 backward due to pressure on the user's head, etc., the movable plate 5 and the rack Φ pinio y]]
, a, 1], b* A force acts in a direction to wind up the coil spring 13 through 12a, 12b and the rotating shaft 10,
The resistance of the coil spring 13 to the rotating shaft 10 is strengthened, and the movable pulley 1/-l・5 and head 17 strike body 1 are strengthened.
For example, when the car seat is used as a nostril rest, when the car is suddenly braked, the movable plate 5 and the headrest main body 15 are further stabilized. When a load is applied in the direction of pushing the movable plate 5, rack/pinion 11a, Ilb/12a, 1
2b and the rotating shaft 10 to unwind the coil spring I3, and the load is absorbed by the coil spring 13, so each member from the movable grate 5 to the coil spring 13 functions as a shock absorber. do.

Next, when adjusting the position of the headrest main body 150 in the front-rear direction, move the operating lever 14 as shown in FIG.

As shown by arrow g in FIG. 3, by operating the coil spring 13 in a direction opposite to the winding direction of the coil spring 13, the diameter of the coil spring 13 is expanded and the rotation axis 0 is unlocked. As a result, the action of the tension springs 7a, 7b provided between the fixed plate 2 and the movable plate 5 and the rack and pinion 11a.

The movable plate 5 is operated forward by the action of 11b, 12a, and 12b, and when the operating lever I4 is released at an arbitrary position,
Since the coil spring 13 contracts in the diametrical direction again and the rotating shaft 10 is locked, the headrest main body 15 can be easily and quickly adjusted to any position.

When adjusting the headrest main body 15 to the rear of the preset position, release the lock of the coil spring 13 from the rotating shaft 10 using the operating lever 1/I as described above, and then release the tensioning lever. The headrest 15 or the movable plate 5 resists the spring force of the springs 7a and 7b.
When you push the lever backwards and then release the operating lever 14 at a desired position, the coil spring 13 contracts in the diametrical direction and the rotating shaft 10 is locked. can do.

Next, FIGS. 4, 5, and 6 show various other embodiments of the present invention.

In FIG. 4, a torsion spring 19 having a diameter larger than the diameter of the rotation shaft 10 is provided on the outer periphery of the end of the rotation shaft 10 in place of the tension springs 7a and 7b described above, and one end of the torsion spring 19 is provided. The part 19a is connected to the fixed plate 2, and the other end part 19b is connected to the rotating shaft 1.
0, the torsion spring 19 is loosened in the process of moving the movable plate 5 in the forward direction, and the torsion spring 19 is tightened in the process of moving the same plate 5 in the backward direction to generate a torsional force. "increase".

Next, FIG. 5 shows a rotary shaft 10 with fixed pulleys l/-) 2 (racks]]a, ]Ib provided on the movable plate 5 side, and a housing 8 and pinions +2a and 12b on the movable plate 5 side.
, and a coil spring 13 for locking the rotary shaft 10, and in accordance with the embodiment shown in FIGS. They are relatively inverted.

Furthermore, in FIG. 6, the movable plate 5 is connected to the fixed plate 2 via a link mechanism 20, and the fixed plate 2 is equipped with sector gears 2 ], a, instead of the racks Ila and llb.
21. l) and the sector gear 21a.

2], b and the pinions 12a, 12b are configured to mesh with each other.

The rotation shaft 10 and the coil spring 13 in the embodiments shown in FIGS. 4, 5, and 6 are similar to the actual moderation mechanism shown in FIGS. 1 to 3,
The effect is also similar.

Further, in the present invention, the rotating shaft is formed into a hollow shape, and a coil spring that expands in the diametrical direction is provided inside the rotating shaft, so that the coil spring comes into pressure contact with the inner peripheral surface of the rotating shaft and locks the rotating shaft. It may be configured as follows.

Furthermore, in the present invention, the mechanism for converting linear motion into rotational motion may be of a frictional contact type instead of the rack and pinion type shown in the drawings.

The above is the configuration of one embodiment of the front-rear position adjustable headrest according to the present invention. According to this configuration, a fixed plate, a movable plate having a headrest body and movable in the front-back direction with respect to the fixed plate, A rotating shaft inserted into a fixed housing, a mechanism installed between the movable plate and the rotating shaft that converts linear motion into rotary motion, a coil spring that presses against the circumferential surface of the rotating shaft and locks it, and By working with an operating lever that applies force in the opposite direction to the winding direction of the coil spring to lock the rotating shaft by 1 VC, the position of the head 1/strike body can be adjusted almost steplessly in the front-rear direction, and easily and quickly. It has the effect of being able to be fixed at the adjusted position.

Further, according to the present invention, fewer parts are required compared to the conventional one, and the shape of each part can be simplified, so that the overall structure can be simplified.

It should be noted that the above description only shows one embodiment of the present invention, and it will be obvious that various modifications and changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the present invention, Fig. 2 is a longitudinal sectional front view of the assembled state, and Fig. 3 is a perspective view of a coil spring for locking the rotating shaft and an operating lever provided thereon. , FIG. 4, FIG. 5, and FIG. 6 are diagrams showing other embodiments of the present invention, respectively. In the figure, 1. a, Ib...Stee, 2...Fixed plate, 5...Movable plate, 8...Housing, 10
... Rotating axis, l l a , 1 l b ・l 2
a, 12 b - Rank and pinion, which is a mechanism for converting linear motion into rotational motion, 13... Coil spring for locking the rotating shaft, 14... Coil spring operating lever, 15... Headrest body, f ...The forward direction of the movable plate, g...The direction of the force applied to the operating lever to unlock the rotating shaft. Figure 1 11”+ Figure 6 Figure 5

Claims (1)

[Claims] 1. A hollow housing is fixed to either a fixed plate or a movable plate that can move in the front and back direction, and a rotating shaft is inserted into the housing, and a rotating shaft is inserted into the housing. A coil spring is wound around the shaft, which contracts in the diametrical direction and comes into pressure contact with the outer peripheral surface of the rotating shaft, or expands in the diametrical direction and comes into pressure contact with the inner peripheral surface of the rotating shaft, and is capable of locking the rotating shaft. The coil spring is provided with an operating lever that applies a force in the opposite direction to the coiling direction to unlock the rotating shaft, and a mechanism is provided between the other plate and the rotating shaft to convert linear motion into rotational motion. and a front-rear position characterized in that the movable plate is configured to be movable in the front-back direction through the operation of a mechanism that changes the linear motion into rotational motion when the rotation axis is unlocked, and a headrest main body is set aside on the movable plate. Adjustable headrest. 2. The mechanism that converts the above 1.1 Iku line 11 motion into rotational motion is composed of a rack and pinion! The front and rear f position adjustable headrest according to claim 1, wherein the front and rear f positions are set as one isomorphic headrest. 3. The longitudinally adjustable headrest according to claim 1, wherein the operating lever is provided at a longitudinally intermediate portion of the coil spring. 4. The coils and springs lock the rotation i11+ when a load is applied to the movable plate having the headrest body in the direction of pushing it forward from the rear.
(1) When the load is applied in the direction of pushing from the front to the rear. The front and back position adjustable headrest described in Section 1 or Section 3.