JPH04193110A - Headrest support structure - Google Patents

Abstract

PURPOSE:To easily adjust a headrest by providing a coupling releasing means releasing the coupling of a coupling section and a coupled section in a seat back with the action of the action section of the headrest in the seat back. CONSTITUTION:In the lock state, a hooking claw 14 is coupled with a notch 21a provided in a seat back 20, an outside stay 12 and a headrest bracket 21 are integrated, and the outside stay 12 containing an inside stay 21a can not be vertically moved and removed from a headrest bracket 21. In a locked headrest 10, a dial 15 is rotated to move the inside stay 18 downward. When the inside stay 18 is moved downward, the hooking claw 14 kept in contact with the periphery of a projection 19 is moved to the side section 18b side by the exciting force into the free state. In the free state, the coupling of the outside stay 12 and the headrest bracket 21 is released, and the outside stay 12 can be vertically moved and removed freely from the headrest bracket 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Applications] This invention relates to a headrest support structure for mounting a headrest on a seat back.

[Prior Art] Conventionally, a headrest support structure is known in which two stays of a headrest are attached to a seat back so as to be movable up and down with respect to the seat back. As such a headrest support structure, there is one shown in FIG.

In FIG. 7, the headrest l has two stays 2a and 2b protruding from the lower end, both stays 2a and 2b.
, 2b are attached to the upper end of the seat bag 3 by penetrating the headrest holders 4, 4 from the upper end of the seat back 3 and inserting and removing them into the seat back 3, respectively. One stay 2a has a plurality of engagement parts 5 formed in the vertical direction, and the headrest holder 4 through which this stay 2a passes is constantly engaged with the engagement parts 5 and engaged by pressing. A knob 6 for releasing the button is provided.

By operating this knob 6, the seated person can move the headrest l to an arbitrary position or pull it out according to the seating position.

By the way, in such a conventional headrest support structure, only one of the stays 2m and 2b that are detachably attached to the seat back 3 is engaged by the knob 6. However, it was inevitable that looseness would occur due to vibrations during driving.

Therefore, by forming an engaging part 5 on the other stay 2b and also providing a knob 6 on the headrest holder 4 through which the stay 2b passes, and bringing both stays 2a and 2b into an engaged state, it is possible to prevent backlash during driving. A headrest support structure that prevents this is considered.

[Problems to be Solved by the Invention] However, in the headrest support structure in which both stays 2a and 2b are in an engaged state, each headrest holder 4 is sandwiched between the headrest 1 and the seat back 3, and Since they are located apart from each other in correspondence with both stays 2a and 2b, if you do not simultaneously unlock the headrest l by operating the headrest l with one hand and operating both knobs 6.6 with the other hand, the headrest 1 cannot be moved to any position or pulled out.

Therefore, there is a problem that the headrest cannot be easily adjusted and the operability is poor.

This invention was made in view of the above problems, and
The purpose is to provide a headrest support structure that prevents play from occurring due to vibrations and the like during driving and allows for easy headrest adjustment.

[Means for Solving the Problems] In order to achieve the above object, the headrest support structure according to the present invention includes a headrest support structure in which two stays of the headrest are attached to the seatback so as to be movable up and down with respect to the seatback. In the structure, each of the stays is formed with an engaged portion that is selectively engaged with an engaging portion provided in the seat back, and the engagement portion provided in the seat back is selectively engaged with the engaged portion. The present invention is characterized in that an engagement release means for releasing the engagement between the engaging portion and the engaged portion is provided in the seat back.

[Operation] With the headrest support structure according to the present invention, the respective engaging portions of the two stays engage with the engaged portion provided in the seat back, and furthermore, the respective engaging portions and the engaged portion The engagement with the headrest is simultaneously released by operating an operating section provided on the outer surface of the headrest.

[Example 7] Examples of the headrest support structure according to the present invention will be described below with reference to the drawings.

The headrest 10 shown in FIG. 1 has two outer stays 12, 12 protruding from the lower end of the main body 11.
Connect both outer stays 12.12 from the upper end of the seat back 20 to both headrest brackets 21.2 inside the seat back 20.
1, it is attached to the seat back 20 so that it can be moved up and down or inserted into and removed from the seat back 20.

The main body 11 has a seat back frame ILm on the internal bottom.
is provided, and a shaft 13 is disposed at a position connecting the center portions of both sides of the interior.

Each outer stay 12 is fixed to the seat back frame lla, spaced apart from each other and with the upper end slightly protruding.

Each of the outer stays 12 is formed of a cylindrical body having the same length, and four notches 12a spaced apart in the vertical axis direction are formed in the opposing outer wall surfaces, respectively. Each notch 121L has 1. A triangular locking pawl 14 having a support shaft 14a at the upper end and an enlarged diameter at the lower part is attached to the notch 12 so that it can freely protrude and retract (Fig. 4,
(see FIG. 5), the locking pawl 14 is in a locked state (fourth
(a), FIG. 5(a)), or a free state in which the lower end 14b is connected to the outer surface of the outer stay 12 and the road surface and the lower end 14c protrudes into the inside of the outer stay 12 (see FIG. 4(b)). )
, see FIG. 5(b)). This locking claw 14 is
It is constantly biased by a biasing member such as a spring to be in a free state.

One end of the shaft 13 is connected to a dial 15 protruding from the side outer surface of the main body 11, and a gear 16 that penetrates the shaft 13 at the center of rotation O is fixed to the center of the shaft 13. (see (a)).

As shown in FIG. 2, the gear 16 is formed into an N-shape having teeth 16a only on the arc portion, and the teeth 16a have a connecting member 1 held movably up and down inside the main body 11.
The teeth 17i of No. 7 are in mesh with each other. The connecting member 17 is formed of a rod-shaped body having teeth 17a on its side and a holding portion 17b at its tip, and the holding portion 17b holds a bottom portion 18a of an inner stay 18, which will be described later.

By operating the dial 15, the inner stay 18 can be moved up and down a certain distance d via the gear 16 and the connecting member F (see FIG. 4).

As shown in FIG. 3, the inner stay 18 is formed of a U-shaped cylindrical body having both side parts 18b, 18b inserted into both outer stays 12.12 so as to be vertically movable and insertable/removable. It is attached to both outer stays 12.12 in the direction shown in FIG. Further, at the lower part of each side portion 18b, four disc-shaped protrusions 19, each of which is a cylindrical body with an enlarged diameter, are formed at four locations with the same distance as the distance between the notches 12a. The protrusion 19 has an outer diameter equal to the inner diameter of the outer stay 12 and an outer diameter between the paths, and has an inclined upper surface that becomes thinner toward the periphery (see FIG. 4). Therefore, each protrusion 19 , are located either corresponding to or offset from each notch 12a.

In other words, when the protrusion 19 is displaced from the notch 12a, the lower end 14c of each locking pawl 14 is moved from the side part 1 due to the urging force.
8b and is in a free state, and the protrusion 19 is in the notch 1.
2a, each locking pawl 14 resists the urging force and abuts the peripheral edge of each protrusion 19 to be in a locked state. By moving the inner stay 18 upward, the locking pawl 14 in the free state is moved so that the lower end 14c is moved to the side 18b.
From there, it moves along the upper surface of the protrusion 19 to the periphery, and becomes locked. Therefore, when the headrest 10 moves, the outer stay 12 and the inner stay 18 move integrally.

The headrest bracket 21 is formed of a cylindrical body that has an inner diameter into which the outer stay 12 can be inserted and has three notches 21a at positions corresponding to the notches 12a (see FIG. 1(a)). An outer stay 1 is attached to the side of the upper part of the pack frame 20a disposed inside.
It is installed corresponding to the installation position of 2 (Fig. 1 (
b)).

Further, the headrest bracket 21 is attached to the back frame 20a by a locking means so that it can be tilted forward and backward and locked, and the headrest IO can be rotated forward and backward relative to the seat pack 20 as shown in FIG. ), and can be held in any position.

In the free state, the locking claw 14 is housed in the headrest bracket 21, so the outer stay 12 containing the inner stay 18 can freely move up and down and be inserted into and removed from the headrest bracket 21. . On the other hand, in the locked state, the locking claws 14 engage with the notches 21a, and the outer stay 12 and the headrest bracket 21 are integrated, and the outer stay 12, which includes the inner stay 18, is attached to the headrest bracket 21. Gear 16 cannot be moved up and down and cannot be inserted or removed.
And the connecting member 17 functions as an engagement release means.

Next, the operation of the headrest support structure according to this embodiment will be explained.

First, FIG. 4 shows a lock release operation by operating the dial 15. With the headrest IO in the locked state (see (a)), the dial 15 is rotated to move the inner stay 18 downward. When the inner stay 18 moves downward, the locking claw 14 that was in contact with the peripheral edge of the protrusion 19 moves to the side 18b by the biasing force and becomes free (
(b)), by entering the free state, the engagement between the outer stay 12 and the headrest bracket 21 is released, and the outer stay 12 can freely move up and down and be inserted into and removed from the headrest bracket 21.

Next, FIG. 5 shows an unlocking operation by pulling up the headrest 10. With the headrest 10 in the locked state (see (a)), the headrest 10 is pulled up. By pulling up the headrest IO and moving the outer stay 12 upward, the locking pawl 14 that has been engaged with the notch 21g of the headrest bracket 21 is pressed against the inner wall of the headrest bracket 21. The pressed locking pawl 14 connects the top surface of the protrusion 19 with the inner stay 18.
It moves to the side and tries to enter the cylinder. At this time,
The inner stay 18 moves downward and becomes free by allowing the locking claw 14 to move, and the outer stay 12 is moved upward relative to the headrest bracket 21 (see (b)).

Then, move the headrest 10 to the desired position and
After positioning the stop claw 14 in accordance with g, dial 1
5 to move the inner stay 18 upward. As the inner stay 18 moves upward, the locking pawl 14 located on the side portion 18b moves the upper surface of the protrusion 19 toward the peripheral edge against the force, resulting in a locked state. By entering the locked state, the outer stay 12 and the headrest bracket 21 engage with each other, and the headrest 10 is held at the set position.

In this manner, the seated person can easily put the headrest 10 into a free state or a locked state when moving it up and down and inserting and removing it.

In addition to using the gear 16 and the connecting member 17, the disengagement means may also use a cam 30 as shown in FIG. 6. In this case, the inner stay 18 is moved by a biasing member such as a spring. It is always urged upward to be in a locked state (see Fig. 1(b)), and the inner stay 18 is moved downward by rotating the cam 30 attached to the shaft 13 by rotating the dial 15. and set it in a free state. In this way, by operating the dial 15, the inner stay 18 can be moved up and down by a certain distance d.

[Effects of the Invention] In the headrest support structure according to the present invention, each of the stays is formed with an engaged portion that is selectively engaged with an engaging portion provided in the seat back, and An engagement release means for releasing the engagement between the engaging part and the engaged part by operating an operating part provided on the outer surface,
Since it is provided inside the seat bag, it is possible to prevent play from occurring due to vibrations during driving, and to easily adjust the headrest.

[Brief explanation of the drawing]

FIG. 1 shows a headrest support structure according to the present invention, in which (a) is an explanatory view of the configuration, and (b) is an explanatory side view. FIG. 2 is an explanatory diagram showing the engagement release means. FIG. 3 is a perspective view of the inner stay. FIG. 4 shows the unlocking operation, with (a) being an explanatory diagram of the locked state, and (b) being an explanatory diagram of the free state. FIG. 5 shows another unlocking operation, in which (a) is an explanatory diagram of the locked state, and (b) is an explanatory diagram of the free state. FIG. 6 is an explanatory diagram showing another disengagement means. FIG. 7 is a perspective view showing a conventional headrest support structure. 10... Headrest 12... Outer stay (stay) 14... Stop claw (engaged part) 15... Dial (operation part) 20... Seat back 21a... Notch (engaged part) )

Claims (1)

[Scope of Claims] In a headrest support structure in which two stays of a headrest are attached to the seatback so as to be movable up and down with respect to the seatback, there is provided a headrest support structure in which two stays of a headrest are attached to the seatback so as to be movable up and down with respect to the seatback. An engaging part is formed on each of the stays, and an engagement release means for releasing the engagement between the engaging part and the engaged part by operating an operating part provided on the outer surface of the headrest; A headrest support structure, characterized in that it is provided within the seat back.