JP2007022168A - Cancelling device of slide interlock type headrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cancelling device for a slide interlock type headrest capable of performing the cancelling operation of an interlocking mechanism in the same place as the button operation of a headrest support and free of ill influencing the seat design surface. <P>SOLUTION: The cancelling device of the slide interlock type headrest is configured so that the headrest 2 makes vertical motions interlocking with the fore-and-aft motions of a seat 1, wherein the interlocking mechanism of the headrest 2 is furnished with a releasing lever 7 for releasing the interlocked motion, and the lever 7 is coupled with a button 10 for operation mounted in the headrest support part 9 of the seat 1 through a link mechanism 8, and the interlocked relation of the headrest 2 is arranged capable of being cancelled through operation from the button 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a canceling device for a slide interlocking headrest that can perform the canceling operation of the interlocking mechanism at the same place as the button operation of the headrest support and does not adversely affect the seat design surface.

  2. Description of the Related Art Conventionally, in an automobile seat, a slide interlocking headrest is known in which the headrest is automatically moved up and down in accordance with the position adjustment of the longitudinal movement of the seat. For example, as disclosed in Patent Document 1, such a headrest incorporates an interlocking mechanism that operates so that the headrest is lowered when the seat is moved to the front side, and the headrest is raised when the seat is moved to the rear side. It is normal. This is because, generally, a person with a large physique moves the seat to the rear side, but the seat height is also high, so it is necessary to increase the position of the headrest, and conversely, a person with a small physique moves the seat to the front side. This is the result of setting the position of the headrest based on the data of a person with a standard physique, considering the tendency that the position of the headrest needs to be lowered because the seat height is low.

However, for people who deviate from the standard physique or who prefer a seated person's unique seating posture, the seating position that is automatically determined does not fit well and a satisfactory sitting comfort is obtained. There was a problem that it was not possible. Therefore, it is necessary to individually adjust the position of the headrest at a position different from the standard specification, and there has been proposed one provided with a slide interlocking headrest cancellation device.
However, the conventional cancel device is a type in which the cancel operation of the interlocking mechanism is performed by operating a lever or the like, and there is a problem that the number of parts increases because a dedicated lever or the like for operating the cancel device is separately provided, and the lever mounting portion There is a problem that the sheet is exposed and adversely affects the sheet design surface.
Japanese Patent Laid-Open No. 10-203220

  The present invention solves the problems as described above, and can prevent a slide design headrest canceling device that can prevent adverse effects on the sheet design surface and can reduce the number of parts dedicated to the canceling device. It was completed for the purpose of providing.

  The slide interlocking headrest canceling device of the present invention made to solve the above problems is a slide interlocking headrest canceling device configured so that the headrest moves up and down in conjunction with the longitudinal movement of the seat, The headrest interlock mechanism is provided with a release lever for interlock release, and the release lever is connected to a button for operation provided on the headrest support portion of the seat via a link mechanism, and the operation of this button allows the headrest interlocking relationship to be established. It is characterized by being free to cancel.

In addition, the headrest interlocking mechanism is an invention according to claim 2 that is performed by meshing a pinion gear that rotates following the longitudinal movement of the seat and a sector gear that rotates so that the headrest moves up and down.
In addition, the link mechanism is configured such that an operation lever that is pivotably mounted at a central portion and an end portion of a release lever that is pivotally mounted at a central portion are connected by a link bar. The other end portion of the release lever is engaged with the operation button, while the other end portion of the release lever is engaged with the pinion gear for driving the headrest.
Furthermore, a hole for engaging with the pinion gear for driving the headrest is formed at the other end of the release lever, and the hole for engaging and holding the engagement state between the pinion gear and the sector gear is formed in the hole. According to a fourth aspect of the present invention, there is provided an engagement release hole portion for releasing the engagement state between the engagement portion and the pinion gear and the sector gear.

  The slide interlocking headrest canceling device of the present invention is provided with a release lever for interlock release in the interlocking mechanism of the headrest, and the release lever is connected to an operation button provided in the headrest support portion of the seat via the link mechanism. With this structure, it is possible to freely cancel the interlocking relationship of the headrest by a simple operation of the button, and it is possible to exhibit excellent operability.

  In the invention of claim 2, the interlocking mechanism of the headrest can be made simple. In the invention of claim 3, the canceling device can have a simple structure. In the invention of claim 4, the meshing state and the releasing state of the pinion gear and the sector gear can be reliably held with a simple structure.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a case where the present invention is applied to a front seat for an automobile. FIG. 1 is a front view of a main part showing a state in which a pinion gear and a sector gear are engaged, and FIG. 2 is a state in which the engagement between the pinion gear and the sector gear is released. FIG. 3 is a perspective view of the entire seat incorporating the cancel device, and FIG. 4 is an explanatory view of the essential portion showing the interlocking relationship between the seat and the headrest.

In the figure, 1 is a seat comprising a seat back and a seat cushion, 2 is a headrest, 2a is a headrest stay, 3a is a lower rail provided in the front-rear direction of the body floor, and 3b is an upper rail provided on the seat side.
The seat 1 incorporates an interlocking mechanism configured to move the headrest 2 up and down in conjunction with the longitudinal movement of the seat 1, and the headrest 2 automatically moves when the seat 1 is moved forward. The headrest 2 is configured to automatically move up when the seat 1 moves down and moves backward.

As the interlocking mechanism of the slide interlocking headrest, for example, the seat cushion side and the headrest side are connected by two wires 4a and 4b for lifting and lowering, and the wires 4a and 4b are interlocked with the longitudinal movement of the seat 1. The headrest 2 can be moved up and down by winding up and rewinding.
An example of the interlocking mechanism is shown in FIGS. 3 to 4, for example, on the upper rails 3b and 3b that move back and forth on the left and right lower rails 3a and 3a, one side for raising the wire 4a and the other side for lowering. One end of each wire 4b is connected, and the other end is wound around a pulley 16 provided coaxially with the rotation shaft 5a of the pinion gear 5. On the other hand, the sector gear 6 is connected to a move 2b provided at the lower part of the headrest stay 2a. The pinion gear 5 and the sector gear 6 are meshed in a normal state, and the sector gear 6 is configured to rotate in synchronization with the rotation of the pinion gear 5.
In such an interlocking mechanism, the wires 4a and 4b move in response to the longitudinal movement of the seat 1, and when the hoisting / rewinding operation is performed on the pulley 16, the rotating shaft 5a rotates and is accompanied by the rotation of the rotating shaft 5a. As a result, the pinion gear 5 rotates. As a result, when the sector gear 6 meshed with the pinion gear 5 rotates synchronously, the arm 17 integrated with the sector gear 6 swings around the hinge pin 17a, and the arm 17 and the move 2b move together with the swing. The move 2b is raised and lowered by interfering with each other in the vertical direction. As a result, the headrest stay 2a moves up and down and the headrest 2 moves up and down. Here, the hinge pin 17a is fixed on the base 18, and the base 18 is fixed to the seat frame.
Of course, the interlocking mechanism is not limited to this, and other known mechanisms can be used.

  As shown in FIGS. 1 and 2, the cancel device for the slide interlocking headrest according to the present invention is provided with a canceling lever 7 for interlocking release with respect to the interlocking mechanism, and the canceling lever 7 is connected to the link mechanism. It is the structure connected with the button 10 for operation provided in the headrest support part 9 of the sheet | seat 1 through this. Therefore, the operation of the button 10 can easily and freely cancel the interlocking relationship of the headrest 2. Moreover, since the canceling operation can be performed at the same place as the button operation of the general headrest support unit 9, it is possible to operate without a sense of incongruity and to prevent the sheet design surface from being adversely affected.

  In the illustrated structure, the link mechanism 8 is connected by a link bar 12 to an operation lever 11 that is pivotably pivoted at the center and an end of a release lever 7 that is pivotally pivoted at the center. It has become a thing. Further, the other end of the operation lever 11 is engaged with the recess 10a of the button 10, while the other end of the release lever 7 is engaged with the pinion gear 5 for driving the headrest. In the figure, reference numerals 13 and 14 denote pivoting portions which are the pivot centers of the release lever 7 and the operation lever 11. Accordingly, when the button 10 is slid, the release lever 7 is swung by the link mechanism 8 and the interlocking relationship of the headrest 2 is canceled as will be described later.

A hole 15 that engages with the pinion gear 5 for driving the headrest is formed at the other end of the release lever 7. Further, the hole 15 includes a mesh holding hole 15a for holding the meshed state of the pinion gear 5 and the sector gear 6, and a mesh release hole 15b for releasing the meshed state of the pinion gear 5 and the sector gear 6. The structure is formed. That is, the hole portion 15 is a so-called guide groove of the pinion gear 5, and a mesh-holding hole portion 15 a that makes the pinion gear 5 mesh with the sector gear 6 and a mesh release position that does not mesh with the sector gear 6. The hole 15b is in communication.
The release lever 7 is provided with a spring 19 between the release lever 7 and the base 18 so that the pinion gear 5 is positioned in the mesh holding hole 15a when the button 10 is not operated.

Next, the operation of the cancel device configured as described above will be described.
In a normal case, as shown in FIG. 1, the pinion gear 5 is held in the engagement holding hole 15 a of the release lever 7 and is thus in engagement with the sector gear 6. As a result, the seat 1 is moved forward and backward. In conjunction with this, the headrest 2 is moved up and down.
On the other hand, to cancel the interlocking relationship of the headrest 2, as shown in FIG. 2, when the button 10 of the headrest support portion 9 is slid in the direction of the arrow, the release lever 7 swings via the link mechanism 8 and the headrest The interlocking relationship of 2 will be canceled easily. That is, when the button 10 is slid, the operation lever 11 is rotated counterclockwise about the pivot portion 13, and the link bar 12 is pulled rightward along with this, so that the release lever 7 is centered on the pivot portion 14. Will swing counterclockwise. As a result, the hole of the release lever 7 also rotates counterclockwise, the pinion gear 5 is guided to the hole 15b for mesh release, and the pinion gear 5 and the sector gear 6 are not engaged. Therefore, if the headrest 2 is adjusted to an arbitrary height in this state, it can be set at a desired height position.

As apparent from the above description, the present invention is a slide interlocking headrest canceling device configured such that the headrest 2 moves up and down in conjunction with the longitudinal movement of the seat 1. A release lever 7 for releasing the interlock is provided, and the release lever 7 is connected to an operation button 10 provided on the headrest support portion 9 of the seat 1 via a link mechanism 8. Since the interlocking relationship can be freely canceled, the cancel operation can be easily performed. Moreover, since the canceling operation can be performed by the button operation of the headrest support unit 9, the operability is excellent, and it is possible to prevent the sheet design surface from being adversely affected.
In addition, since the operation unit for the canceling device is provided in the generally supported edested support part, there is also an advantage that the number of parts can be reduced, and further, the headrest together with the upper part of the seat frame moves forward and upward. When the so-called active headrest function is installed and the button operation direction for canceling is set to the vertical direction, the canceling device functions due to the movement of the headrest part associated with the active headrest function. There is a possibility that the position of the headrest may not be determined, but in the case of the embodiment of the present invention, the direction of the button operation is the horizontal direction, and is the direction orthogonal to the movement of the headrest portion by the active headrest function. There is also an advantage that the fear can be prevented.

It is a front view of the principal part which shows the state which the pinion gear and the sector gear meshed. It is a front view of the principal part which shows the state which cancel | released meshing | engagement with a pinion gear and a sector gear. It is a perspective view which shows the whole sheet | seat incorporating the cancellation apparatus. It is a front view which shows the principal part of the sheet | seat incorporating the cancellation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 2 Headrest 2a Headrest stay 4a Ascending wire 4b Ascending wire 5 Pinion gear 5a Rotating shaft 6 Sector gear 7 Release lever 8 Link mechanism 9 Headrest support part 10 Operation button
10a Recess 11 Operation lever 12 Link bar 15 Hole
15a Hole for holding mesh
15b Hole for releasing mesh 16 Pulley 17 Arm
17a Hinge pin 18 Base 19 Spring

Claims (4)

  A slide interlocking headrest canceling device configured to move the headrest up and down in conjunction with the forward and backward movement of the seat, wherein the interlocking mechanism of the headrest is provided with a release lever for releasing the interlock, and the release lever is connected to the link mechanism The slide interlocking headrest canceling device is characterized in that it is connected to an operation button provided on the headrest support portion of the seat via a button, and the interlocking relationship of the headrest can be canceled by operating this button.   2. The slide-linked headrest according to claim 1, wherein the headrest interlocking mechanism is formed by meshing a pinion gear that rotates following the longitudinal movement of the seat and a sector gear that rotates so that the headrest moves up and down. Cancel device.   The link mechanism is configured such that an operation lever that is pivotably mounted at a central portion and an end portion of a release lever that is pivotally mounted at a central portion are coupled to each other by a link bar. 3. The slide interlocking headrest canceling device according to claim 1, wherein the other end portion is engaged with an operation button, and the other end portion of the release lever is engaged with a pinion gear for driving the headrest. The other end of the release lever is formed with a hole that engages with the pinion gear for driving the headrest, and the hole includes a hole for meshing holding that holds the meshed state of the pinion gear and the sector gear. The slide interlocking headrest canceling device according to claim 3, wherein a mesh release hole for releasing the meshing state of the pinion gear and the sector gear is formed.

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