JPH064751Y2 - Headrest device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to a headrest device in which a stay is extended upward from an upper end portion of a seat back and a headrest main body is supported on the stay so that the headrest body can be adjusted in the vertical position and the front-back position. Regarding

"Prior Art" Conventionally, as a headrest device of this type, for example, there is one shown in FIG.

That is, the stay 2 is mounted on the seat back 1 so as to be vertically movable, and the stay 2 is composed of an outer stay 3 and an inner stay 4 that is inserted into the outer stay 3 so as to be relatively movable vertically. A drive mechanism 6 for adjusting a vertical position for vertically moving the inner stay 4 to adjust the headrest main body 5 vertically is incorporated, and an output end 6a of the drive mechanism 6 for adjusting the vertical position and the outer stay 3 are provided. Are connected via a connecting bracket 6b, and the inner stay 4 is connected to the outer stay 3.
A drive mechanism 7 for adjusting the front-rear position for moving the headrest main body 5 in the front-rear position by moving the headrest main body 5 relative to each other. The output end 7a of the drive mechanism 7 for adjusting the front-rear position and the inner stay 4 form a connecting bracket 7b. It is connected through.

[Problems to be Solved by the Invention] However, in such a conventional headrest device, for example, a tool or the like is put in from the rear of the seatback 1 and the output end 6a of the drive mechanism 6 for adjusting the vertical position inside and the outside. Since it is necessary to connect the stay 3 and the output end 7a of the drive mechanism 7 for adjusting the front-rear position and the inner stay 4, workability is not good, which is a great obstacle to improving productivity. . In particular, when the headrest main body 5 is assembled to the seat back 1 and then the headrest main body 5 is replaced due to, for example, a failure, the number of man-hours for the replacement work is significantly increased, and there is a problem that productivity is extremely reduced.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a headrest device capable of reducing man-hours for mounting the headrest body and improving productivity. .

[Means for Solving the Problems] The gist of the present invention for achieving such an object is to extend a stay upward from an upper end portion of a seat back, and to adjust the vertical position of a headrest main body to the stay, and a front and rear position. In the headrest device that is adjustable, the stay includes an outer stay that is vertically movable on a seat back, and an inner stay that is fitted in the outer stay and is vertically movable relative to the outer stay. And a drive mechanism for vertical position adjustment capable of vertically moving both the outer stay and the inner stay, and a drive mechanism for front and rear position adjustment capable of vertically moving only the inner stay, which are incorporated in a seat back, The outer stay and the inner output member are the output end of the drive mechanism for adjusting the vertical position and the inner output member that is the output end of the drive mechanism for adjusting the front-rear position. And an operating shaft having an operating end projecting from an upper end of the seat back, the operating shaft being inserted into the seat back and extending vertically in the seat back, and being rotatably supported. It is vertically movable and relatively non-rotatably inserted, and when the operation shaft rotates, it swings about the operation shaft, and engages with the outer output member and the outer stay together to make relative movement. An outer lock member that is swingable between a restraining position that is vertically unmovable and a restraining position that keeps the engaged state with the outer output member and is disengaged from the outer stay; It is relatively vertically movable and relatively non-rotatably inserted, and when the operating shaft rotates, it swings around the operating shaft and engages both the inner output member and the inner stay. Between the inner output member and a restraint position that restrains the upper and lower members from moving relative to each other A headrest device characterized in that it is provided with an inner lock member that is swingable in a restraint release position that is maintained from the inner stay and is released from the inner stay.

[Operation] Inside the seat back, a drive mechanism for adjusting the vertical position and a drive mechanism for adjusting the front-rear position are arranged. Also, from the lower end of the headrest body to the outer stay downward,
The inner stay that fits inside the outer stay is extended.

The outer lock member is in the restrained position, engaged with the outer stay, and also engaged with the outer output member which is the output end of the drive mechanism for adjusting the vertical position. Similarly, the inner lock member is in the restrained position, engaged with the inner stay, and also engaged with the inner output member which is the output end of the drive mechanism for adjusting the front-rear position.

As a result, when the drive mechanism for vertical position adjustment operates,
Both the outer stay and the inner stay move up and down through the outer output member and the inner output member, and the headrest body moves up and down to adjust its position. At this time,
The outer output member and the inner output member move vertically with respect to the operation shaft.

When the drive mechanism for adjusting the front-rear position is operated, the inner stay moves up and down with respect to the outer stay via the inner output member, whereby the headrest body is displaced in the front-rear direction to adjust the front-rear position of the headrest body. be able to. At this time, the inner output member moves vertically with respect to the operation shaft.

To replace the headrest body mounted on the seat back, the operation shaft protruding from the upper end of the seat back may be rotated. As a result, both the outer lock member and the inner lock member swing from the restraint position to the restraint release position, the outer stay can be removed from the outer output member, and the inner stay can be removed from the inner output member.

At the restraint release position, the outer lock member remains engaged with the outer output member, and similarly, the inner lock member remains engaged with the inner output member.

To mount the headrest body to be replaced, the outer stay is fitted into the outer output member and the inner stay is fitted into the inner output member.

Back and forth, the operation shaft is rotated to move the outer lock member and the inner lock member from the restraint release position to the restraint position. As a result, the outer lock member engages with the outer stay, the inner lock member engages with the inner stay, and the replacement work ends.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention.

As shown in FIG. 1, a headrest body 30 is attached to the seat back 10 via a pair of stays 20.

The stay 20 includes pipe-shaped outer stays 21 and 21 arranged on both inner sides of the seat back 10, and a pair of inner stays 2 that are fitted in the outer stays 21 and are vertically movable relative to each other.
2 and.

A pair of supporting members 11 are fixedly mounted on a back frame (not shown), and a holder member 12 is fitted to each supporting member 11. The outer stay 21 is supported by the holder member 12 so as to be vertically movable. The holder member 12 is composed of a holder body 14 having a disk-shaped head 13 and a cap portion 15 fitted to the disk-shaped head 13.

As shown in FIGS. 1 and 2, in the interior of the seat back 10, a drive mechanism 50 for adjusting the vertical position of the headrest body 30 and a headrest body 3 are provided.
A drive mechanism 60 for adjusting the front-rear position for adjusting 0 to the front-rear position is provided.

The main bodies of both drive mechanisms 50 and 60 are not shown in the figure, and the output rod 51 of the drive mechanism 50 for adjusting the vertical position is extended to a position below the holder member 12 and is not attached to the output rod 51. A cylindrical outer output member 52 into which the stay 21 can be inserted is fixed. A cut groove 53 is formed in the outer output member 52.

The drive mechanism 50 for adjusting the vertical position has a drive motor (not shown) as a power source, and is screwed to the screw member that interlocks with the drive motor and moves up and down when the screw member rotates forward and backward. And a nut member.

Similarly, the output rod 61 of the drive mechanism 60 for adjusting the front-rear position is extended to a position below the outer output member 52, and the output rod 61 has a cylindrical inner output member 62 into which the inner stay 22 can be inserted. It is fixed. A cut groove 63 is formed in the inner output member 62.

The drive mechanism 60 for adjusting the front-rear position includes a drive motor, a screw member, a nut member, and the like.

In the seat back 10, the bearing member 16 is fixedly provided at a position below the inner output member 62. The bearing member 16 and the head portion 13 of the holder member 12 rotatably support the operation shaft 70 extending in the vertical direction.

The upper end portion 71 of the operation shaft 70 projects from the head portion 13 of the holder member 12, and a lever member 72 is fixed to the protruding portion, and the guide groove 17 formed in the head portion 13 by the lever member 72.
It projects laterally through. Lower end 7 of operating shaft 70
A spring member 74 is wound around 3.

An outer lock member 80 is provided at an intermediate portion of the operation shaft 70 in the vertical direction.
The base end portion 81 is inserted so as to be relatively vertically movable and relatively non-rotatable. The operating shaft 70 is biased by a spring member 74 in a swinging direction in which the tip end portion 82 of the outer lock member 80 engages with the cut groove 53 of the outer output member 52 and the locking groove 21a of the outer stay 21. .

When the operation shaft 70 is rotated by the lever member 72 against the biasing force of the spring member 74, the lever member 72 contacts the end portion of the guide groove 17 and the tip portion 8 of the outer lock member 80.
2 is still engaged with the cut groove 53 of the outer output member 52,
An end portion of the guide groove 17 serves as a stopper portion 18 so as to be disengaged from the locking groove 21a of the outer stay 21.

Similarly, a base end portion 91 of the inner lock member 90 is inserted through an intermediate portion in the vertical direction of the operation shaft 70 so as to be relatively vertically movable and relatively unrotatable. Due to the urging force of the spring member 74, the tip portion 92 of the inner lock member 90 is moved to the inner output member 62.
The notch groove 63 and the locking groove 22a of the inner stay 22 are both urged in the swinging direction.

The lever member 72 rotates the operation shaft 70 against the biasing force of the spring member 74, so that the lever member 72 moves the guide groove 17
When the stopper portion 18 that is the end portion of the inner output member 62 comes into contact with the stopper portion 18, the tip end portion 92 of the inner lock member 90 is cut into the cut groove 63 of the inner output member 62.
It is formed so as to be disengaged from the locking groove 22a of the inner stay 22 while being engaged with.

Next, the operation will be described.

Inside the seat back 10, a drive mechanism 50 for adjusting the vertical position and a drive mechanism 60 for adjusting the front-back position are arranged. On the other hand, the outer stay 21 and the inner stay 2 that is fitted into the outer stay 21 downward from the lower end of the headrest body 30.
2 and are extended respectively.

The outer locking member 80 is in the restrained position, and the tip portion 82 thereof is
Engages with the engaging groove 21a of the outer stay 21 and also engages with the notch groove 53 of the outer output member 52. Similarly, the inner lock member 90 is in the restrained position, and the front end portion 92 thereof is engaged with the locking groove 22a of the inner stay 22 and is engaged with the cut groove 63 of the inner output member 62.

As a result, the outer stay 21 is constrained by the outer output member 52 so that it cannot move vertically, and the inner stay 22 is restrained by the inner output member 6.
It is restrained so that it cannot move up and down relatively.

When a drive motor (not shown) of the drive mechanism 50 for adjusting the vertical position is operated, the outer stay 2 is moved through the outer lock member 80.
1 moves up and down, and the inner stay 22 moves up and down via the inner lock member 90, and the headrest body 30
Can be moved up and down to adjust its position.

At this time, the operation shaft 70 moves up and down relatively with respect to the outer output member 52 and the inner output member 62.

When a drive motor (not shown) of the drive mechanism 60 for adjusting the front-rear position is operated, the inner output member 62 moves up and down with respect to the outer stay 21 via the inner lock member 90, whereby the headrest. The main body 30 is displaced in the front-rear direction, so that the front-rear position of the headrest main body 30 can be adjusted.

At this time, the operation shaft 70 moves up and down relatively with respect to the inner output member 62.

To replace the headrest body 30 mounted on the seatback 10, the lever member 72 protruding laterally from the head portion 13 of the holder member 12 rotates the operation shaft 70 against the biasing force of the spring member 74. It can be operated dynamically.

When the lever member 72 is operated until it abuts the stopper portion 18 of the guide groove 17, both the outer lock member 80 and the inner lock member 90 swing from the restraint position to the restraint release position via the operation shaft 70, and the outer lock member is released. The front end portion 82 of the outer stay 21 is disengaged from the locking groove 21a of the outer stay 21, and the front end portion 92 of the inner lock member 90 is locked by the locking groove 22a of the inner stay 22.
Will come off.

As a result, the outer stay 21 can be removed from the outer output member 52, and the inner stay 22 can be removed from the inner output member 62.

At the restraint release position, the tip portion 8 of the outer lock member 80
No. 2 maintains the state of engaging with the cut groove 53 of the outer output member 52, and similarly, the tip end portion 92 of the inner lock member 90 maintains the state of engaging with the cut groove 63 of the inner output member 62. .

Since the outer lock member 80 is engaged with the notch groove 53, the outer stay 21 is fitted and inserted into the outer output member 52 and the locking groove 2
The outer lock member 80 can be engaged with the locking groove 21a by a simple operation without any adjustment, simply by making 1a coincide with the cut groove 53.

In order to mount the headrest body 30 to be replaced, the outer lock member 80 and the inner lock member 90 are set to the restraint release position, the outer stay 21 is fitted into the outer output member 52, and the inner stay 22 is internally output. Fit into the member 62.

Next, when the hand is released from the lever member 72, the operation shaft 70 is rotated by the urging force of the spring member 74. Thereby,
The outer lock member 80 and the inner lock member 90 swing to move from the restraint release position to the restraint position.

As a result, the tip end portion 82 of the outer lock member 80 engages with the engagement groove 21a of the outer stay 21, and the tip end portion 92 of the inner lock member 90 engages with the engagement groove 22a of the inner stay 22, thereby leading to the headrest body. It is possible to make the front and rear position adjustable and the vertical position adjustable.

According to the headrest device according to the above-described embodiment, the outer output member 52 of the drive mechanism 50 for adjusting the vertical position is interposed via the outer lock member 80, and the inner output member 62 of the drive mechanism 60 for adjusting the front-rear position is provided inside. Operation shaft 70 via lock member 90
The outer stay 21 and the inner stay 22 are easily inserted into the outer output member 52 and the inner output member 62, respectively, and the workability can be further improved.

[Advantage of Invention] According to the headrest device of the present invention, the operation shaft projecting from the upper end of the seat back is rotated to move the outer locking member and the inner locking member to the restraining position and the restraining releasing position, respectively. Since the outer stay and the inner stay can be engaged and disengaged by swinging, the number of man-hours for attaching and detaching the headrest body is extremely reduced, and the productivity can be improved.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a perspective view of a headrest device, FIG. 2 is a perspective view of a main portion of the same, and FIG. 3 is a perspective view showing an outer locking member and the like. 4 and 5 are perspective views showing a lever member and the like, and FIG. 5 is a perspective view of a headrest device showing a conventional example. 10 ... Seat back 20 ... Stay 21 ... Outer stay 22 ... Inner stay 30 ... Headrest body 50 ... Drive mechanism for vertical position adjustment 52 ... External output member 60 ... Drive mechanism for longitudinal position adjustment 62 ... Inner output member 70 ... Operation shaft 80 ... Outer lock member 90 ... Inner lock member

Claims (1)

[Scope of utility model registration request] 1. A headrest device in which a stay is extended upward from an upper end portion of a seat back, and a headrest main body is supported by the stay so that the headrest main body can be adjusted in the vertical position and the longitudinal position, the stay being movable in the seatback in the vertical direction. An outer stay to be mounted and an inner stay that fits in the outer stay and can move up and down relatively to the outer stay. Vertical position adjustment for vertically moving both the outer stay and the inner stay. And a front-back position adjusting drive mechanism capable of moving only the inner stay up and down for adjusting the front-rear position, and an outer output member that is an output end of the up-down position adjusting drive mechanism, and the front-rear position. The outer stay and the inner stay are fitted and inserted into an inner output member, which is an output end of a drive mechanism for position adjustment, and the seat stay is extended vertically and rotatable. When the operating shaft is supported by the operating shaft and has an operating end protruding from the upper end of the seat back, and the operating shaft is inserted through the operating shaft so as to be vertically movable and relatively non-rotatable. And a state of engagement between the outer output member and a restraining position in which the outer output member and the outer stay are engaged with each other so as to be relatively immovable in the vertical direction. An outer lock member that can be maintained and swingable to a restraint release position where it is disengaged from the outer stay, and similarly, is inserted through the operation shaft so as to be vertically movable and relatively non-rotatable so that the operation shaft rotates. The engaging position between the inner output member and a restraining position in which the inner output member and the inner stay are rocked together when they are moved so that the inner output member and the inner stay are restrained relative to each other. Inner lock that can be swung to the restraint release position where it stays in the fitted state and is released from the inner stay Headrest apparatus being characterized in that a wood.