JP2008155785A - Head rest for active head rest and its lifting/lowering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting/lowering device for a head rest for an active head rest, capable of lifting and leaning forward the head rest at high speed before a head part is lifted and/or a neck part is extended at the time of a collision (by making the head rest lead to the lifting position and leaning forward position before the head part (neck part) is lifted and/or leaned backward after the collision) and of avoiding whiplash and damage to the head part etc. <P>SOLUTION: This active head rest comprises means provided on a seat back. The means is configured to lift/lean forward the head rest via a drive body device provided in a frame and driven by an impact, a wire lifted/lowered inside the seat back and connected to the drive body device, the lifting/lowering device on which the wire is locked and a head rest bracket connected to a lifting/lowering body/cylindrical part of the lifting/lowering device. This configuration is versatile and economical. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a headrest lifting / lowering device (active headrest) for an active headrest that protects the upper body of a human head, neck, etc. upon impact (collision) on a vehicle. The headrest is protected at high speed and instantaneously by moving the headrest upward (rising) and tilting forward (forward tilting) at a high speed before the head rises (extends), for example, There is a demand for avoiding whiplash, neck injury, fatal accidents, and the like. There is also a need for a general-purpose active headrest that is economical. The present invention relates to a headrest lifting device for an active headrest that can meet this demand.

  As is well known, safety has become an important issue in the evolution of quality required for vehicles. One example is to avoid whiplash at the time of impact, head / neck (head) injury, and / or death due to cutting. The important point is the “active headrest” of the present invention. Further, as described above, in order to achieve the headrest movement and forward tilt at a high speed and instantaneously, normally, within about 1 second, the rise is about 40 to 50 mm, and about 20 to 35 °. It is considered desirable to lean forward. For that purpose, a reliable movement of the lifting device of the headrest and its speed and / or ascent distance are essential. Since the back is normally in contact with the seat back, it is protected by the seat having this structure at the time of impact.

  In view of the above, therefore, there are many prior literatures relating to this “active headrest”. And in part, it is used for practical use. As an example, literatures are listed below. However, it is not necessarily considered sufficient as a headrest device for an active headrest that instantaneously raises a predetermined distance and tilts forward to protect the head.

  First, document (1) is a “vehicle seat” disclosed in Japanese Patent Application Laid-Open No. 2005-296266. The present invention comprises an expandable / contractable side frame provided on a seat frame, an actuator having a forward tilt mechanism provided between the side frames, and a headrest stay that can be raised and lowered on a headrest support provided on the actuator. The headrest is lifted by the headrest stay rising, and the headrest is tilted forward by the forward tilt mechanism to protect the head by moving the upper body of the driver, passenger, etc. (driver) backward, The head is protected by moving up.

  Reference (2) is a “vehicle seat structure” disclosed in Japanese Patent Application Laid-Open No. 2001-163099. According to the present invention, the headrest holder that supports the headrest stay can be tilted forward and raised through the guide means provided on the frame, the guide means can be returned by the regulating spring, and the guide means can be tilted forward and raised. Is controlled by passive means such as a cloth belt disposed in the seat back, and the head is protected in the same manner as in the above document (1).

  Reference (3) is “Automobile Seat” disclosed in Japanese Patent Application Laid-Open No. 2000-219069. The present invention relates to an upper pipe provided in each seatback frame, a pipe frame that is attached to and detachable from a headrest stay attached to the upper pipe, and a headrest that tilts the pipe frame forward. The support frame and a pressure receiving portion provided on the support frame and a frame for tilting the headrest forward, the support frame and the pipe frame are moved by the pressure of the pressure receiving portion, and the seat back is raised and tilted forward. Thus, the head is protected in the same manner as the document (1). And this literature (3) expands the amount of movement of the pressure receiving part to the rear movement of the upper body of the driver in the series of operations described above, and aims to increase the distance of movement of the headrest forward. Intended.

  Further, Document (4) is “Automobile Seat” of Japanese Patent Laid-Open No. 2000-21114. The present invention has a structure in which a headrest support frame for supporting a headrest is provided at an upper end portion of a lever mechanism and a link mechanism (lever / link mechanism) fixed to a seat back frame. A lever that swings up and down in conjunction with a pressure receiving portion that moves under the load of the load, a first link provided between the lever and the headrest support frame, and a second link provided between the first link and the seat back frame By moving the lever link mechanism through the movement of the pressure receiving portion, and moving and tilting the headrest support frame and the headrest in the same manner as in the above document (1) To protect.

JP-A-2005-296266 JP 2001-163099 A JP2000-219069 JP2000-2111410A

  Document (1) has a configuration in which the headrest is moved and tilted forward via a side frame that can be expanded and contracted and an actuator that is a forward tilt mechanism provided on the side frame. Therefore, there is a possibility that the structure becomes complicated, or it may not operate correctly in an emergency in the event of a collision, and there is room for improvement. In such a structure, it is difficult to say that it is a general-purpose type. There is room for improvement in automatic assembly.

  Document (2) is a configuration in which the headrest stay is raised by passive means such as a cloth belt. Therefore, it is conceivable that the ascent distance and the ascent speed (instantaneous movement) may be insufficient, which is not sufficient for protecting the head, or for comprehensively protecting the head movement at the time of collision. Some points should be improved. Other than the above, there are improvements similar to the above-mentioned document (1).

  And literature (3) is a structure which moves a support frame and a pipe frame, and raises and inclines forward a seat back by press of this pressure receiving part. Therefore, in this configuration, the movement of the head at the time of the collision, the movement and / or the rise of the responsiveness are ensured through the instantaneous movement necessary for comprehensively protecting the movement of the head at the time of the collision. Is not necessarily sufficient, and there is room for improvement.

  Further, the document (4) is configured to move the lever / link mechanism through the movement of the pressure receiving portion and to move and tilt the headrest support frame and the headrest. Therefore, it is mainly configured to use the movement of the lever / link mechanism, and it is considered that the ascending speed is insufficient, which is not sufficient for protecting the head, or the movement of the head at the time of collision. Some improvements should be considered to comprehensively protect Other than the above, there are improvements similar to the above-mentioned document (1).

  In view of the above, the present invention comprehensively protects the movement of the head at the time of collision regardless of the occupant's body shape, sitting posture, etc. It is intended to provide active headrests that are general-purpose, economical, and reasonably assembled so that the above-mentioned objectives can be reliably achieved. . The characteristics are hereinafter referred to as “1” to “7”.

“1” An active headrest that is embedded in a seat back and is composed of an elevating and lowering device provided on the frame and / or intermediate member of the seat back to control the upward and forward tilt, and a drive main unit. The headrest can be lifted and tilted at a high speed before the head is lifted and / or the neck is extended (after the collision, the headrest is moved to the raised position before the head (neck) lifts and / or slides backward). And a headrest lifting device for an active headrest capable of avoiding whiplash and avoiding injury to the head, etc.
“2” Not only the headrest rises, but also keeps its descent (mainly after a collision), and it can be reused and secure a responsive rise / forward and / or descent that can effectively use resources, and practical use Proposal of a headrest lifting device for active headrest that can be used for
“3” The drive main unit and the lifting device that operates in accordance with the command of the drive main unit are linked via a medium means (one or preferably several wires). It is a configuration that operates the lifting device and raises and tilts the headrest, and proposes a headrest device for an active headrest capable of tilting forward and climbing speed (instantaneous movement) instantaneously,
“4” Regardless of the body type of the passenger (height, weight, weight, obesity, etc.) or sitting posture (under all conditions), the head can be protected appropriately. Proposing a headrest lifting device for an active headrest that can ensure safety and security, or ensure driving and driving comfort,
“5” In the lifting device, the headrest is lifted mainly by the drive main body device, the medium means, the lifting body, and the first spring, and the headrest is tilted mainly by the support, the movable body, and the support arm. And a proposal of a headrest lifting device for an active headrest that can perform the forward tilting and lifting operations reliably and without malfunctioning,
"6" Proposal of a headrest lifting device for an active headrest that enables a headrest bracket to be automatically assembled to a movable body, ensures a general-purpose configuration, is economical, and streamlines manufacturing.
“7” A structure that ensures the connection between the first locking body provided on the lifting body and the second locking body provided on the movable body, and the first locking body and the second locking body. Proposal of a headrest lifting device for an active headrest that can automatically assemble a second spring to be provided, ensure a general-purpose configuration, and can be economical and streamlined manufacturing.

  The invention of claim 1 is intended to provide a headrest lifting device for an active headrest that can achieve the above-mentioned objects “1” to “5”.

Claim 1 is a headrest for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (ascent) and forward inclination (forward inclination) of the headrest,
This ascending / forward tilting mechanism
Elevating device provided in a frame and / or intermediate member provided in a seat back of the vehicle, a driving main device provided in the frame and / or intermediate member for giving a command to the movement of the elevating device, and the driving main device Medium means such as a wire, a suspension member, etc., one of which is connected to the lifting device and the other, and the operation of the medium means when the driving main device is operated when an impact is applied to the vehicle. Comprising the start and the locking and device provided on the frame and / or the intermediate member for this operation,
Also, this headrest device
A headrest bracket carried on a support arm of the lifting device, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted into the headrest support, and a headrest provided on the headrest stay,
An active configuration in which the operation of the driving main unit, the start of the operation of the medium means based on this operation, and the operation of the lifting / lowering device are performed by this operation, and the headrest support and the headrest are raised and tilted forward. It is a headrest for a headrest.

“General-purpose cutive headrests and / or active headrests for implementation products”
The invention of claim 2 is intended to achieve the object of claim 1 and to provide a headrest lifting device for an active headrest that is optimal for achieving this object.

A second aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
The lifting device provided on the seat back is
A support provided on the frame and / or the intermediate member, a movable body movably supported by a pivotal support portion of the support, a support arm for supporting a headrest bracket provided at both ends of the movable body, and the support A pair of cylinders inserted into the arm and connected to the headrest bracket, a lifting body linking and standing the pair of cylinders, a first locking body standing on the lifting body, A second locking body provided on the support body for receiving the first locking body; a locking pin provided on the elevating body and fitted in a guide hole provided in a guide piece of the support body; and the first locking body A second spring fitted between the body and the second locking body, and a first spring inserted between the support arms and secured to the headrest bracket with one end secured to the headrest bracket And
The medium means for locking to the lifting body is connected to the drive main unit device via a pulley provided on the support body from the first locking body and the second locking body, and the locking means,
An active configuration in which the operation of the driving main unit, the start of the operation of the medium means based on this operation, and the operation of the lifting / lowering device are performed by this operation, and the headrest support and the headrest are lifted and tilted forward. It is the raising / lowering device of the headrest for headrests.

"Specific examples of lifting devices"
The invention of claim 3 is intended to achieve the object of claim 1, to provide a headrest support elevating structure (means) for an active headrest that is optimal for achieving the object.

A third aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
Lifting and lowering the headrest for the active headrest, which is configured to complement the lifting and lowering of the headrest support and the moving distance of the medium means and secure the rising of the headrest through a first spring inserted between the support arms of the movable body. Device.

“Relationship between first spring and headrest support”
The inventions of claims 4 and 5 are intended to achieve the object of claim 1 and to provide a headrest support lifting body returning structure for an active headrest that is optimal for achieving the object.

A fourth aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
The return of the lifting body of the lifting device is a first locking body provided substantially at the center of the lifting body, and a second locking that is tubular and receives the first locking body and is suspended from the upper surface of the support body. Composed of body and
The first locking body includes one or several flexible guide rails and a second spring locking pressing piece provided on the guide rails.
The second locking body is provided with one or several guide grooves for receiving the guide rails, and a curved surface provided on the inner wall surface of the guide grooves,
In accordance with the rising of the first locking body, the guide rail and / or the pressing piece of the first locking body is a headrest raising / lowering device for an active headrest configured to be recessed in the second locking body. .

"Locking relationship between the first locking body and the second locking body when returning the lifting device"
A fifth aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
The first locking body is composed of a tubular main body standing from the lifting body, a guide rail standing from the opposite direction of the main body, and a pressing piece projecting from a vertical surface in the longitudinal direction of the guide rail. ,
This is a headrest lifting device for an active headrest configured to ensure a clearance between the upper surface of the pressing piece of the first locking body and the lower surface of the second spring at the time of initialization.

"Structure of the first locking body"
The invention of claim 6 is intended to achieve the object of claim 5 and to provide a structure of a pressing piece and a second spring of a headrest support for an active headrest that is optimal for achieving this object.

Claim 6 is a pressing piece and a second spring of the headrest lifting device for the active headrest according to claim 5,
The pressing piece sinks into the second locking body as the elevating body rises, and the second spring is locked from the pressing piece, and the first protrusions on the upper and lower surfaces of the second locking body. And a headrest lifting device for an active headrest configured to be held by a second protrusion.

"Locking relationship between the first locking body and the second spring"
The invention of claim 7 is intended to achieve the object of claim 1, to provide a headrest support support and lift structure for an active headrest optimal for achieving this object, and the like.

A seventh aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
A guide piece is projected in the front direction of the main body through a bracket extending from the main body of the support body, a guide hole is formed in the guide piece, and a locking pin of the elevating body is engaged with the guide hole. It is the headrest raising / lowering device for the active headrest configured to be combined.

"Moving relationship between support and lifting body"
The invention of claim 8 is intended to achieve the object of claim 7, to provide a structure of a support for a headrest support for an active headrest that is optimal for achieving the object.

Claim 8 is a lifting device for a headrest for an active headrest according to claim 7,
The headrest lifting / lowering device for an active headrest is configured such that a third spring is interposed between a resin bush provided in the guide hole and the guide hole.

“Buffer structure when the active headrest is restored”
The invention of claim 9 is intended to achieve the object of claim 1 and to provide a return structure for a lifting / lowering body of a headrest support for an active headrest that is optimal to achieve this object.

A ninth aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
The lifting / lowering body of the lifting / lowering device is returned from the upper surface of the first locking body provided with a hollow portion provided substantially at the center of the lifting / lowering body and the support inserted into the hollow portion of the first locking body. With a second locking body to be installed,
This first locking body is provided with a pair of hook pieces and a small hole for inserting a second spring provided in the hook piece,
In addition, a first protrusion for locking the second spring is provided on the second locking body,
When the first locking body is raised, the first locking body is a headrest lifting device for an active headrest that is inserted into the second locking body.

"Returning elevator"
The invention of claim 10 is intended to achieve the object of claim 1 and to provide a structure of a first locking body and a second spring of a headrest support for an active headrest optimal for achieving the object. To do.

A tenth aspect of the present invention is the headrest lifting device for the active headrest according to the first aspect,
It is a headrest lifting device for an active headrest configured to support a second spring provided on the first locking body with a gap between the pair of flanges.

"Relationship between active headrest cushion and second spring"
The invention of claim 11 is intended to achieve the object of claim 1 and to achieve the object of “6” described above.

Claim 11 is a bush of the headrest lifting device for the active headrest according to claim 1,
The headrest bracket is configured to support via a bush of a support arm provided on the movable body,
By adopting this configuration, the headrest bracket is inserted from the tube portion, and at the time of the insertion, a first spring is mounted on the tube portion, and after the mounting, the first spring is mounted on the support arm. It is a headrest lifting device for an active headrest that is configured to be insertable.

“One-touch assembly structure of the headrest support bracket to the movable body”
The invention of claim 12 is intended to achieve the object of claim 1 and to achieve the object of “7” described above.

A twelfth aspect of the present invention is the second locking body of the headrest lifting device for the active headrest according to the first aspect,
This second locking body is a headrest lifting device for an active headrest that has a configuration in which a locking projection provided on the upper end of the second locking body can be fitted to a rib piece protruding from the movable body with one touch.

"Locking relationship of the second spring in the second locking body"
The invention of claim 13 is intended to achieve the object of claim 1, to provide a headrest device optimal for achieving this object, and the like.

A thirteenth aspect of the present invention is a headrest device for a headrest lifting device for an active headrest according to the first aspect,
This is a headrest lifting device for an active headrest in which this headrest bracket and a headrest support are integrated.

“Integrated headrest bracket and headrest support”
The invention of claim 14 is intended to achieve the object of claim 1 and to provide an optimum driving body device for achieving the object.

A fourteenth aspect of the present invention is a drive main unit of a headrest lifting device for an active headrest according to the first aspect,
The drive main device includes a main body provided on the frame, a pressure receiving part provided movably on a pivot provided on the main body part, and a movable part equipped with a wire operated by a link mechanism provided on the pressure receiving part. It is the headrest raising / lowering device for active headrests comprised by these.

"Drive main device"
The invention of claim 15 is intended to achieve the object of claim 1 and to provide a support body and a lifting body for a lifting device that are optimal for achieving the object.

A fifteenth aspect of the present invention is a support body and a lifting body for a headrest lifting device for an active headrest according to the first aspect,
This is a headrest lifting device for an active headrest having a structure in which a protrusion is provided on the guide piece or bush of the support, and the stop is stopped by a locking pin of the lifting body through the protrusion.

        “Stopping and buffering of support and lifting body”

The invention of claim 1 is a headrest for an active headrest provided with an ascending / forward-inclining mechanism that controls upward movement (ascent) and forward inclination (forward inclination) of the headrest,
Ascending and tilting mechanism,
Elevating device provided in frame and / or intermediate member installed in vehicle seat back, driving main device provided in frame and / or intermediate member giving command to movement of elevating device, one connected to driving main device And a medium means such as a wire and a suspension member linked to the lifting device, and a frame that starts and operates the medium means when an impact is applied to the vehicle and the drive main unit operates. Consists of a locking device provided on the intermediate member,
The headrest device
It is composed of a headrest bracket carried by the support arm of the lifting device, a headrest support that is fitted into the headrest bracket, a headrest stay that is loosely fitted to the headrest support, and a headrest provided on the headrest stay.
This is a headrest for an active headrest that is configured to operate the drive main unit, start the operation of the medium means based on the operation, and operate the lifting device to raise and forward the headrest support and headrest. .

  Therefore, the first aspect of the present invention can provide a headrest lifting device for an active headrest that can achieve the above-mentioned objects “1” to “5”.

The invention of claim 2 is a headrest lifting device for an active headrest according to claim 1,
The lifting device provided in the seat back is
A support provided on the frame and / or the intermediate member, a movable that is movably supported by the pivot of the support, a support arm for supporting the headrest bracket provided at both ends of the movable, and a support arm that is inserted into the support arm. And a pair of cylinders connected to the headrest bracket, a lifting body that connects and stands the pair of cylinders, a first locking body that stands on the lifting body, and a support that receives the first locking body Between the first locking body and the second locking body, the second locking body provided on the body, the locking pin provided on the lifting body and fitted in the guide hole provided in the guide piece of the support body, A second spring to be mounted, and a first spring which is inserted between the support arms and fixed to one end of the headrest bracket and mounted on the headrest bracket,
The medium means for locking to the lifting body is linked to the drive main unit device via the pulley provided on the support body from the first locking body and the second locking body, and the locking means,
Raising and lowering the headrest for an active headrest configured to actuate the lifting and lowering device by operating the drive main unit, starting the operation of the medium means based on the operation, and moving the headrest support and the headrest upward and forward. Device.

  Accordingly, the second aspect has features such that the object of the first aspect can be achieved and a headrest lifting device for an active headrest that is optimal for achieving the object can be provided.

The invention of claim 3 is the headrest lifting device for the active headrest according to claim 1,
A headrest lifting device for an active headrest that is configured to supplement the lifting and lowering of the headrest support and the movement distance of the medium means through the first spring inserted between the support arms of the movable body, and to ensure the rising of the headrest. .

  Accordingly, the third aspect has features such that the object of the first aspect can be achieved, and a headrest support raising / lowering structure (means) for an active headrest that is optimal for achieving the object can be provided.

Invention of Claim 4 is the raising / lowering apparatus of the headrest for active headrests of Claim 1, Comprising:
The return of the lifting body of the lifting device includes a first locking body provided substantially at the center of the lifting body and a second locking body that is tubular and receives the first locking body, and is suspended from the upper surface of the support body. Configure
The first locking body includes one or several flexible guide rails and a second spring locking pressing piece provided on the guide rail,
The second locking body is provided with one or several guide grooves for receiving the guide rails, and a curved surface provided on the inner wall surface of the guide grooves,
The headrest lifting device for the active headrest is configured such that the guide rail and / or the pressing piece of the first locking body are recessed in the second locking body as the first locking body rises.

The invention of claim 5 is a headrest lifting device for an active headrest according to claim 1,
The first locking body is composed of a tubular main body standing from the lifting body, a guide rail standing from the opposite direction of the main body, and a pressing piece protruding from a vertical surface in the longitudinal direction of the guide rail,
The headrest lifting device for an active headrest is configured to ensure a clearance between the upper surface of the pressing piece of the first locking body and the lower surface of the second spring at the time of initialization.

  Accordingly, claims 4 and 5 have the characteristics that the object of claim 1 can be achieved, and the return structure of the headrest support elevating body for the active headrest that is optimal to achieve this object can be provided.

The invention of claim 6 is a pressing piece and a second spring of the headrest lifting device for the active headrest according to claim 5,
The pressing piece is raised in the second locking body as the elevating body is raised, and the second spring is locked from the pressing piece, and the first protrusion and the second protrusion on the upper and lower surfaces of the second locking body. It is a headrest lifting device for an active headrest configured to be held.

  Accordingly, the sixth aspect has the characteristics that the object of the fifth aspect can be achieved, and the structure of the pressing piece and the second spring of the headrest support for the active headrest that is optimal for achieving the object can be provided.

The invention of claim 7 is a headrest lifting device for an active headrest according to claim 1,
A guide piece is projected in the front direction of the main body through a bracket extending from the main body of the support body, a guide hole is formed in the guide piece, and a locking pin of the lifting body is engaged with the guide hole. It is the raising / lowering device of the headrest for active headrests.

  Accordingly, the seventh aspect has the characteristics that the object of the first aspect can be achieved and the structure of the support body and the lifting body for the headrest support for the active headrest that is optimal for achieving the object can be provided.

The invention of claim 8 is a headrest lifting device for an active headrest according to claim 7,
It is a headrest lifting device for an active headrest in which a third spring is interposed between a resin bush provided in the guide hole and the guide hole.

  Therefore, claim 8 has the characteristics that the object of claim 7 can be achieved, and the structure of the support for the headrest support for the active headrest that is optimal for achieving this object can be provided.

The invention of claim 9 is a headrest lifting device for an active headrest according to claim 1,
The return of the lifting body of the lifting device is suspended from the first locking body provided with a hollow portion provided substantially at the center of the lifting body and the upper surface of the support body inserted into the hollow portion of the first locking body. Composed of two locking bodies,
The first locking body is provided with a pair of hook pieces and a small hole for inserting a second spring provided in the hook piece,
In addition, a first protrusion for locking the second spring is provided on the upper portion of the second locking body,
The headrest lifting / lowering device for an active headrest is configured such that the first locking body is inserted into the second locking body when the first locking body is raised.

  Accordingly, the ninth aspect has the characteristics that the object of the first aspect can be achieved, and the return structure for the lifting / lowering body of the headrest support for the active headrest that is optimal for achieving the object can be provided.

The invention of claim 10 is a headrest lifting device for an active headrest according to claim 1,
It is a headrest lifting device for an active headrest configured to support a second spring provided on the first locking body with a gap between a pair of flanges.

  Accordingly, claim 10 has the characteristics that the object of claim 1 can be achieved, and the structure of the first locking body and the second spring of the headrest support for the active headrest that is optimal to achieve this object can be provided. .

The invention of claim 11 is a bush of the headrest lifting device for the active headrest according to claim 1,
The headrest support bracket is configured to support via a support arm bush provided on the movable body,
By adopting the configuration, the headrest bracket is inserted from the cylindrical portion, and at the time of insertion, the first spring is mounted on the cylindrical portion, and after the mounting, the first spring can be inserted into the support arm; and This is a headrest lifting device for an active headrest.

  Therefore, claim 11 has features such that the object of claim 1 can be achieved, the object of “6” described above can be achieved, and the like.

Invention of Claim 12 is the 2nd latching body of the raising / lowering apparatus of the headrest for active headrests of Claim 1, Comprising:
The second locking body is a headrest lifting device for an active headrest that has a configuration in which a locking protrusion provided on the upper end can be fitted to a rib piece protruding from the movable body with a single touch.

  Accordingly, the twelfth aspect has features such that the object of the first aspect can be achieved and the object of the above-mentioned “7” can be achieved.

A thirteenth aspect of the present invention is a headrest device for a headrest lifting device for an active headrest according to the first aspect,
It is the headrest raising / lowering device for active headrests which integrated the headrest bracket and the headrest support.

  Accordingly, the thirteenth aspect has features such that the object of the first aspect can be achieved and a headrest device optimal for achieving the object can be provided.

A fourteenth aspect of the present invention is a drive main device of a headrest lifting device for an active headrest according to the first aspect,
The drive main unit is composed of a main body part provided on the frame, a pressure receiving part provided movably on a pivot provided on the main body part, and a movable part equipped with a wire operated by a link mechanism provided on the pressure receiving part. It is the raising / lowering device of the headrest for active headrests.

  Accordingly, claim 14 has the characteristics that the object of claim 1 can be achieved, and the drive main unit that is optimal for achieving the object can be provided.

Invention of Claim 15 is the support body and raising / lowering body of the raising / lowering apparatus of the headrest for active headrests of Claim 1, Comprising:
This is a headrest lifting device for an active headrest having a structure in which a protrusion is provided on a guide piece or a bush of a support, and the locking pin of the lifting body is stopped via the protrusion.

  Accordingly, the fifteenth aspect has the characteristics that the object of the first aspect can be achieved and the support body and the lifting body of the lifting device that are optimal for achieving the object can be provided.

  In the following, embodiments of the present invention will be described by dividing each of the main parts.

“First, a basic configuration common to the embodiments will be described.”
The present invention is an active headrest B that is mounted on a seat back A1 that constitutes a seat A of a vehicle. The active headrest B includes a metal frame 1 embedded in the seat back A1 and a lower end of the frame 1. A drive main unit C provided on the medium, medium means D (wire 10) connected to the drive main unit C and provided from the lower side to the upper side of the frame 1 (seat back A1), and the medium. A lifting device E connected to the means D and provided above the frame 1 and a locking device for locking (regulating stoppage) and / or releasing the lifting device E, the driving main body device C, or the medium means D. The device F, and a collision sensor (not shown) for controlling the operation of the locking device F provided if necessary, the lifting device E, the locking device F, and the medium means D act to raise and forward tilt. The headrest device H provided in the frame 1 comprises a head rest G as the ability to principal components. In addition, the collision sensor is provided at an appropriate position of the vehicle.

“First, a first example of the lifting device E will be described with reference to FIGS. 2-1, 2-2, 3-1 and FIGS.
The lifting device E is composed of the following “a” to “f” as major constituent requirements.

“I” The locking portion 200 provided on the back side (behind the seat back A1) provided to be locked or held on the frame 1 and / or the intermediate member 100 (referred to as the frame 1) and / or the stopper to be tightened A plate-like main body 2a provided with a hole 201, a bracket 202 provided above the main body 2a in pairs (so as to face each other in the width direction of the sheet A), and a pair below the main body 2a A support body 2 composed of a forwardly inclined guide piece 203 provided with a provided guide hole 203a;
“B” A plate-like shape provided with a pair of support arms 300 (for example, in the vertical direction in FIG. 3A) into which a headrest bracket (described later) and / or a cylindrical portion (described later) of a lifting body (described later) is inserted A main body 3a, a bracket 301 provided on the main body 3a in pairs (so as to face each other in the width direction of the sheet A), and a locking portion 302 on which a second locking body (described later) is locked. A movable body 3 configured;
“C” A main body 4a including a cylinder portion 400 (to be fitted and fixed or removed) connected to a headrest bracket (described later) inserted into the support arm 300 of the movable body 3, and the main body 4a. A first locking body 401 erected substantially at the center, a pair of locking pins 402 provided between the first locking body 401 and the cylindrical portion 400 provided on the main body 4a, and one of the locking pins 402, which is composed of a guide groove 403 adjacent to 402 and recessed in the main body 4a,
"D" The second locking body 6 locked to the locking portion 302 that receives the first locking body 401;
“E” The first spring 7 inserted between the support arms 300 (attached) and secured to one end of the headrest bracket and fitted to the headrest bracket;
“To” The second spring 8 is provided between the first locking body 401 and the second locking body 6.

  Then, the operation of the lifting device E will be described. At the time of the stop, the locking of the locking means, which will be described later, or the locking of the lifting / lowering body 4 or the locking of the medium means D (wire 10) is released. It is pulled toward the seating surface of the sheet A (arrow “I”). The cylinder portion 400 of the elevating body 4 enters the support arm 300 through the tension and / or the repulsion of the first spring 7, and the space portion of the movable body 3 enters the main body 4a of the elevating body 4 ( In addition, a structure in which only the headrest bracket (headrest device H “headrest G”) is lifted through the reaction of the first spring 7 is also possible. This approach and the raising / lowering body 4 are raised (in the direction of arrow “B” in FIG. 2B) and / or the headrest bracket is raised (moved). It is to be noted that the structure is such that the locking to the lifting body 4 or the headrest bracket (headrest device H) is released during the ascent.

  Further, the bracket 202 of the support body 2 is configured to be engaged with the bracket 301 of the movable body 3, and the movable body 3 is configured to be movable with the engaging portions 302 and 200 of the brackets 301 and 202 as fulcrums. is there. Based on this movement, the headrest bracket (headrest device H) is movable (tilted forward) as will be described later (in FIG. 2B, it is tilted forward in the direction of the arrow “c”). To do). Incidentally, the basic of the movement is that the locking pin 402 is guided and moved by the guide hole 203a of the guide piece 203 provided in the support body 2 through the raising of the lifting body 4, and the same movement as the lifting body 4 is performed. As described above, the movable body 3 is pivotally attached to the support body 2 and the locking portions 302 and 200, so that the ascending and / or moving movement of the elevating body 4 is linked through the support arm 300 as it is. The movable body 3 is converted to movable. Further, as described above, the headrest G is configured to rise (move).

  Further, the relationship between the first locking body 401 and the second locking body 6 in the ascending process will be described. The first locking body 401 and the second locking body 6 are shown in FIGS. 9, FIG. 10, and FIG. 11. A second spring 8 is provided between the first protrusion 600 and the second protrusion 601 provided above and below the second locking body 6. In addition, two guide grooves 603 and 604 (notch grooves) are formed in the second locking body 6, and guide curved surfaces 605 and 606 are provided inside the guide grooves 603 and 604. Yes. Further, the first locking body 401 includes a tubular main body 401a erected from the main body 4a of the elevating body 4, a pair of guide rails 401-1 erected from the opposite direction of the main body 401a, and each guide rail 401-1 ( A pressing piece 401-2 projecting from a vertical surface in the longitudinal direction (explained on the other hand), and both ends of the guide rail 401-1 in the longitudinal direction have flange pieces 401-1a. And this guide rail 401-1 slides in the guide grooves 603 and 604 of the 2nd latching body 6 (refer FIGS. 5-2-5-5, FIG. 5-7). At the time of this sliding, the pressing piece 401-2 is guided by the curved surfaces 605 and 606, and is depressed into the tube 6a of the second locking body 6 (see FIGS. 5-3 to 5-5). ). At the time of the depression, it is separated from the second spring 8 (see FIG. 5-4).

  Hereinafter, the relationship between the first locking body 401 and the second locking body 6 will be described based on the drawings. In FIG. 5B, the first locking body 401 is in the initial position. The guide rail 401-1 of the first locking body 401 is fitted (entered) into the cylinder 6 a of the second locking body 6, and the second spring 8 is connected to the first locking body 8. It is provided between the protrusion 600 and the pressing piece 401-2 of the first locking body 401. “B” In FIG. 5C, the guide rail 401-1 of the first locking body 401 is in the state of the positional relationship immediately before the second spring is released from the first locking body 401. This is the positional relationship immediately before the second spring 8 is disengaged from the pressing piece 401-2 of the first locking body 401. “C” In FIG. 5-4, the guide rail 401-1 of the first locking body 401 is connected to the second locking body 6 in a positional relationship where the second spring is disengaged from the first locking body 401. In the cylinder 6a, the second spring 8 is further fitted in the state where the pressing piece 401-2 of the first locking body 401 is depressed in the second locking body 6 from FIG. The positional relationship is deviated from the pressing piece 401-2 of the one locking body 401. “D” In FIG. 5-5, the first locking body 401 is almost completely inserted into the cylinder 6 a of the second locking body 6 with the first locking body 401 in the lift-up position. The second spring 8 is provided between the first protrusion 600 and the second protrusion 601 of the second locking body 8. "E" In FIG. 5-7, the first locking body 401 is in the reset state, and the entire first locking body 401 is detached from the cylinder 6a of the second locking body 6, and the second spring 8 is provided between the first protrusion 600 of the second locking body 8 and the pressing piece 401-2 of the first locking body 401, and the second spring 8 is pressed against the first locking body 401. Pressure is acting.

  The above structure and / or characteristics during operation will be described. When the first locking body 401 is released from the pressing of the second spring 8, it is possible to ensure a smooth and reliable rise of the elevating body 4. The second spring 8 is mounted on the pressing piece 401-2 of the first locking body 401 and the first protrusion 600 of the second locking body 6, so that the lifting body 4, the movable body 3 and the second spring 8 are mounted. It helps to prevent the headrest device H from rattling. Further, by adopting such a structure, the first locking body 401, the second spring 8, and the second locking body 6 can be automatically assembled. Although not described in detail, if the second spring 8 is tightened when it is raised, it can be used for returning the elevating body 4, the movable body 3, and the headrest device H, for example. 5-7, when the second spring 8 presses the first locking body 401, the first locking body 401 and / or the lifting body 4 and the like are prevented from rattling. The first protrusion 600 of the second locking body 6 and the guide grooves 603 and 604 are in the crossing direction (an example), that is, in the state shown in FIG. The positional relationship is shown in an enlarged view of the main part, in which the guide rail 401-1 is inserted into the guide groove 603 and the second protrusion 601 intersects the guide groove 603. In addition, it is desirable to provide the guide groove 603 with the protrusion 603-1, respectively, and to achieve blind movement and its reinforcement.

  In the second example of the lifting device E shown in FIGS. 3-3 to 3-4, at least the first spring 7 is omitted, the simplest structure is used, cost reduction, production ease, and general purpose Intended for conversion. Other structures follow the first example.

  The locking device F of the present invention is configured to lock the elevating body 4 and has a structure in which the second spring 8 is locked to the pressing piece 401-2 of the first locking body 401 described above. As described above, the structure in which the locking is released when 401-2 is depressed in the pipe 6a of the second locking body 6 is an example. Further, as shown in the illustrated locking mechanism F, the locking piece 13 is separated from the lifting body 4 at the time of impact, and the locking piece 13 is locked via the third spring 12 in normal times. There can also be an example.

  FIG. 5-8-1 is a schematic view conceptually showing the characteristics of the first locking body 401. The process of inserting the return spring 404 into the protrusion 401-6 of the first locking body 401 is shown. It is the principal part expansion schematic diagram shown, Comprising: It is set as the structure where the free end of the spring 404 protrudes from the line shown by the imaginary line, and when this spring 404 is compressed, the hole 404-1 (for fixing) ) Is fitted and secured to the protrusion 401-6, thereby further imparting elasticity to the elasticity of the first locking body 401 itself. And in the example which provides this spring 404, it is useful for the return | restoration when this 1st latching body 401 is compressed for a long time. Therefore, the spring 404 mainly protects the open end of the first locking body 401. A structure in which the spring 404 is not provided is shown in FIG. In the example of FIG. 5-8-1 and the like, the protrusion 401-6 preferably has an inclined surface that facilitates fitting of the spring 404 and a fixed step portion (see FIG. 5-8-1).

“The drive main unit C will be described.”
The driving main body device C in this example has an example shown in FIGS.

  A pressure receiving portion 22 movably provided on a main body portion 20 provided on the frame 1 via a pivot 21, a movable portion 22 a for inserting and / or pulling down the wire 10 provided in the pressure receiving portion 22, and this movable A link mechanism 22b for moving the portion 22a, an elastic body 23 for the cushion and pressure receiving portion 22 embedded in the seat back A1 that controls the return of the pressure receiving portion 22 (an elastic body), and a guide rod for guiding the wire 10 23, and when the pressure receiving portion 22 is pressed at the time of impact, the wire 10 is pulled through the movable portion 22a and the lifting body 4 is pulled up as described above. Then, the wire 10 is connected via the automatic return of the pressure receiving portion 22 (the automatic return of the elastic body 23 or the spring 22c may be provided, and the return may be caused by repulsion) and / or the second spring 8 of the lifting device E or the like. It is a structure to restore. Although not shown, the headrest G is provided with means for securing the state for a certain period of time after the operation of the elevating body 4, the locking pin 402, or the pressure receiving portion 22 (several minutes after the collision). The protection is the same as in the past. Further, a normal locking mechanism of the pressure receiving portion 22 is omitted. The elastic body 23 is provided so as to be urged to a receiving portion 24 embedded in the seat back A1. The pressure receiving portion 22 has a structure that can freely move about 10 mm with the pivot 21 as a fulcrum, and has a structure that does not operate even if there is an impact on the pressure receiving portion 22 and / or an impact on the seat back A1. To do. Thereby, unnecessary movement of the headrest device H is avoided, and safety and the function of the seat A are maintained.

  Next, an example of the resin bush 14 as another member and another example of the first locking body 401 and the second locking body 6 will be described. First, the bush 14 is fitted into a guide hole 203a provided in the guide piece 203 of the support 2, and has a structure capable of exhibiting compatibility with the locking pin 402 and sliding characteristics, and is provided when necessary. It is done. Further, the bush 14 includes a collar piece 1400, and has a structure that is useful for ease of fitting into the guide hole 203a, reduction in thickness, and the like. Further, although not shown, the bush 14 is provided with a locking depression (not shown) for receiving the locking pin 402 (at the time of collision).

  The bushing 14 is fitted with a locking pin 402. The fourth to sixth springs 16-1 can be used to reduce the impact on the locking pin 402 and to adjust the vertical stroke and / or the lifting speed. 16-3 can be provided, and an example thereof is shown in FIGS. 6-2 to 6-4. 6B is a claw piece 14a provided on the bush 14 by the fourth to sixth springs 16-1, and is elastically attached between the claw piece 14a and the inner peripheral surface of the guide hole 203a. Yes. FIG. 6-2 shows a fifth spring 16-2 having a fitting structure, and FIG. 6-4 shows a sixth spring 16-3, which is a spring spring. A plurality of the fourth to sixth springs 16-1 to 16-3 can be provided if necessary. FIG. 6-5 shows the relationship between the locking pin 402 and the bush 14 at the time of resetting (the guide piece 203 is also the same), and protects the fourth to sixth springs 16-1 to 16-3. In order to do this, a protrusion 14 a is provided on the bush 14 and / or the guide piece 203, and a stop mechanism is shown in which the concave portion 402 b provided on the flange 402 a of the locking pin 402 stops against the protrusion 14 a. That is, the bushing 14 and / or the guide piece 203 has a structure in which the locking pin 402 does not impactly impact.

  FIG. 6-6 to FIG. 6-9 are examples in which the bush 14 and / or the guide piece 203 (explained by the bush 14) are provided with a stop mechanism (stop means), and the lifting device E (lifting body 4) is raised. An example of a structure that stops at the time (the locking pin 402 of the lifting body 4) will be described. With this structure, the headrest G is temporarily stopped to protect the head and the like. A preferred example will be described. The example of FIGS. 6-6 is a first stop mechanism in which the shape of the bush 14 is changed, and has a structure in which a stop portion 14b is formed on the bush 14. stop. And the dimensional relationship was illustrated. FIG. 6-7 shows a second stop mechanism, which conforms to the first stop mechanism. The locking pin 402 is temporarily stopped at the stop portion 14b. 6-8 shows a third stop mechanism, which is a flexible piece 1401 provided on the bush 14 with one to several stripes, and temporarily stops by holding the locking pin 402 with the flexible piece 1401. . FIG. 6-9 shows a fourth stop mechanism, which has a structure in which the free end of the flexible piece 1401 in FIG. 6-8 is free, and is similar to FIG. 6-8.

“Next, the headrest device H will be described with reference to FIGS. 1 to 2A and 2B.”
In this configuration, the lower end of the elevating body 4 of the elevating device E is connected to the cylindrical portion 400, and a part thereof is inserted (supported) into the bush 50 fitted to the opening 300 a of the support arm 300 so as to be raised and lowered. ) Headrest bracket 51, a headrest support 52 inserted into the headrest bracket 51, a headrest stay 53 provided on the headrest support 52, and a headrest G provided on the headrest stay 53. The stopper 54 secured to the headrest bracket 51 is provided with a pair of legs 5400 (one example) for locking the first spring 7. In this example, by fixing the stopper 54 to the headrest bracket 51 in advance, the headrest bracket 51 can be easily assembled between the support arms 300 while the first spring 7 is installed between the support arms 300. There is a feature that can be attached (inserted, mounted, etc.). And this headrest bracket 51 and / or the raising / lowering body 4 raises through the reaction of this 1st spring 7, As a result, the headrest G rises. In this example, the headrest G is lowered by, for example, an operation of pressing the headrest G by holding the headrest stay 53 with at least two fingers I after the headrest G has been raised and tilted for a predetermined time. In the structure in which each member is returned to the initial state by performing (human) and the structure in which the second spring 8 is stretched when it is raised, the headrest G is lifted and tilted back after a predetermined time. The configuration is advantageous in that it can be automated. FIG. 12 is an overhead view showing another example of the headless bracket 51 and / or the headrest support 52. For example, the headrest support 51 and the headrest support 52 are integrally formed with resin. In this example of integral molding, for example, cost reduction and ease of manufacture are attempted, but the mechanism and / or characteristics are the same as described above. In the figure, 55 indicates an elastic mechanism provided on the headrest bracket 51 (headrest support 52), and 56 indicates a locking mechanism provided on the headrest bracket 51 (headrest support 52).

  In the figure, reference numeral 60 denotes a pulley, which is provided in the vicinity of the upper end of the movable body 3 and, if necessary, close to the drive main unit C, to guide the wire 10 reliably and to gain a stroke of the wire 10.

  FIGS. 11A to 11C are diagrams illustrating other examples of the movable body 3. For example, the movable body 3 is integrally molded with resin, and preferably, the second locking body is attached to the main body 3 a of the movable body 3. 8 is integrally formed. In this example, the weight is reduced, the cost is reduced, the mounting is facilitated, and the like. Other structures follow the above-described movable body 3. In the figure, 3b represents a reinforcing rib piece.

  13-1 to 13-4 show the input load and / or the operation stroke of the pressure receiving portion 22 constituting the drive main body device C and the operation stroke and / or the operation time of the headrest G. FIGS. 13-1 to 13-2 show the first example shown in FIG. 3-1, and FIGS. 13-3 and 13-4 show the first example shown in 3-2. Show. And in this table | surface, the 1st example has the effect that the pressure receiving and raising speed were very excellent. Also in the second example, the effect of pressure receiving and ascending speed is more remarkable than in the conventional example. In addition, -10 shows the above-mentioned buffer time.

  FIG. 14 is a diagram showing the relationship between the load (repulsive force) of the first spring 7 on the headrest G and the stroke of the wire 10, which acts with a slight delay when the wire 10 is pulled. It shows a state where the repulsive force gradually declines. On the other hand, the state in which the second spring 8 is sequentially tensioned is shown, indicating that it is provided at the time of return and that it is effective for preventing play.

1 is an overall scale schematic diagram showing an example of a vehicle (automobile) seat and a seat back. FIG. 2-1 is a schematic side-scale diagram conceptually showing the relationship between the seat back and the active headrest during normal operation (before collision). Fig. 2-2 is a side-scale schematic diagram conceptually showing the relationship between the seat back and the active headrest at the time of collision. FIG. 3A is an overall scale front view showing the relationship between the lifting device of the active headrest and the headrest device in a normal state of the first example. Scale front view of the first example set in a vehicle showing the relationship between the active headrest lifting device and the headrest device, the elastic body, and the drive main device during normal operation. FIG. 3-2 is an overall scale front view showing a second example (an example without the first spring of FIG. 3-1). FIG. 3-4 is an overall scale front view showing the lifting device and the headrest in the example of FIG. FIG. 3-5 is a scale front view showing another example of FIG. FIG. 4 is a side view substantially similar to FIG. 3-1. FIG. 5A is a schematic diagram conceptually showing the main part of the relationship between the first locking body and the second locking body, with only the first locking body in front. FIG. 5-2 is a schematic diagram conceptually showing the main part of the relationship between the first locking body and the second locking body, and a schematic diagram of the state where the first locking body is in the initial position. FIG. 5C is a schematic diagram conceptually showing the main part of the relationship between the first locking body and the second locking body, and the position immediately before the second spring is released from the first locking body. Schematic diagram of relationship status FIG. 5-4 is a schematic diagram conceptually showing an essential part of the relationship between the first locking body and the second locking body, in a position where the second spring is removed from the first locking body. Schematic diagram of a state FIG. 5-5 is a relationship between the first locking body and the second locking body, and is a schematic diagram conceptually showing an essential part of the first locking body, in which the first locking body is in a lift-up position. Figure 5-6 is a cross-sectional view of the main part of the second locking body FIG. 5-7 is a schematic diagram conceptually showing the main part of the relationship between the first locking body and the second locking body, in which the first locking body is in a reset state. FIG. 5-8-1 is a schematic view conceptually showing the characteristics of the first locking body, and is an enlarged schematic view of the main part showing the process of inserting a spring into the protrusion of the first locking body. FIG. 5-8-1 is a schematic diagram conceptually showing the characteristics of the first locking body, and is an enlarged schematic view of a main part showing a structure in which the protrusion of the first locking body is not provided with a spring. Fig. 5-9-1 is an enlarged view of the main part of Fig. 5-2 FIG. 6A is a diagram illustrating the relationship between the guide hole of the support and the resin bush fitted into the guide hole, and enlarges the resin bush fitted into the guide hole of the support. Perspective view FIG. 6B is an enlarged view of the guide hole of the support and another resin bush fitted into the guide hole. FIG. 6-3 is a sectional view showing the relationship between the guide hole of the support and still another resin bush fitted into the guide hole. FIG. 6-4 is a sectional view showing the relationship between the guide hole of the support and another resin bush fitted into the guide hole. FIG. 6-5 is an enlarged side view of a partial defect showing a stopping mechanism when the guide piece and the locking pin are reset. 6-6 is an enlarged front view showing an example of the first stop mechanism on the bush (the guide piece is the same). FIG. 6-7 is an enlarged front view showing an example of the second stop mechanism on the bush (the guide piece is the same). 6-8 is an enlarged front view showing an example of a third stop mechanism on the bush (the guide piece is the same). 6-9 is an enlarged front view showing an example of a fourth stop mechanism on the bush (the guide piece is the same). FIG. 7 is a front perspective view of the movable body. FIG. 8-1 is a schematic view showing the support, and is a front perspective view of the support. FIG. 8-2 is a schematic view showing the support, and a side view of the support FIG. 9 is a side view of the main part showing the locking relationship between the support and the movable body. FIG. 9-2 is a front perspective view showing the lifting body. FIG. 9-3 is an enlarged front perspective view showing the second locking body. FIG. 10-1 is a front view of the drive main unit. 10-2 is a plan view of the drive main unit. FIG. 10-3 is a cross-sectional view of the drive main unit as viewed from the side. FIG. 11A is a front view illustrating another example of the movable body. FIG. 11-2 is a plan view showing another example of the movable body. 11-3 is a cross-sectional view taken along line AA in FIG. 11-1. Overhead view showing another example of headrest bracket and headrest support FIG. 13-1 is a table showing the input load and / or the operating stroke of the pressure receiving portion of the drive main unit of the first example. FIG. 13-2 is a table showing the operation stroke and / or operation time of the headrest of the first example. FIG. 13-3 is a table showing the input load and / or the operating stroke of the pressure receiving portion of the drive main unit of the second example. FIG. 13-4 is a table showing the operation stroke and / or operation time of the headrest of the second example. FIG. 14 is a diagram showing the relationship between the load (repulsive force) of the first spring on the headrest and the stroke of the wire.

Explanation of symbols

A Seat A1 Seatback B Active Headrest C Drive Main Device D Medium Means E Lifting Device F Locking Device G Headrest H Headrest Device I Finger 1 Frame 100 Intermediate Member 2 Support 2a Main Body 200 Locking Part 201 Hole 202 Bracket 203 Guide Piece 203a guide hole 3 movable body 3a main body 3b rib piece 300 support arm 300a opening 301 bracket 302 locking portion 4 lifting / lowering body 4a main body 400 cylindrical portion 401 first locking body 401a main body 401-1 guide rail 401-1a flange piece 401 -2 pressing piece 401-5 hollow portion 401-6 protrusion 402 locking pin 402a collar portion 402b recess 403 guide groove 404 spring 6 second locking body 6a in-pipe 600 first protrusion 601 second protrusion 603 guide groove 603-1 protrusion Article 604 Id groove 604-1 Projection 605 Curved surface 606 Curved surface 7 First spring 8 Second spring 10 Wire 12 Third spring 13 Locking piece 14 Bush 14a Protruding portion 14b Stopping location 1400 Fitting piece 1401 Flexible piece 16-1 Fourth spring 16-2 5th spring 16-3 6th spring 20 Main body part 21 Pivot 22 Pressure receiving part 22a Movable part 22b Link mechanism 23 Elastic body 24 Receiving part 50 Bush 51 Headrest bracket 52 Headrest support 53 Headrest stay 54 Stopper 5400 Leg 55 Elasticity Mechanism 56 Locking mechanism 60 Pulley

Claims (15)

A headrest for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (rise) and forward inclination (forward inclination) of the headrest,
This ascending / forward tilting mechanism
Elevating device provided in a frame and / or intermediate member provided in a seat back of the vehicle, a driving main device provided in the frame and / or intermediate member for giving a command to the movement of the elevating device, and the driving main device Medium means such as a wire, a suspension member, etc., one of which is connected to the lifting device and the other, and the operation of the medium means when the driving main device is operated when an impact is applied to the vehicle. Comprising the start and the locking device provided on the frame and / or intermediate member for this operation,
Also, this headrest device
A headrest bracket carried on a support arm of the lifting device, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted into the headrest support, and a headrest provided on the headrest stay,
An active configuration in which the operation of the driving main unit, the start of the operation of the medium means based on this operation, and the operation of the lifting / lowering device are performed by this operation, and the headrest support and the headrest are lifted and tilted forward. Headrest for headrest. A headrest lifting device for an active headrest according to claim 1,
The lifting device provided on the seat back is
A support provided on the frame and / or the intermediate member, a movable body movably supported by a pivotal support portion of the support, a support arm for supporting a headrest bracket provided at both ends of the movable body, and the support A pair of cylinders inserted into the arm and connected to the headrest bracket, a lifting body linking and standing the pair of cylinders, a first locking body standing on the lifting body, A second locking body provided on the support body for receiving the first locking body; a locking pin provided on the elevating body and fitted in a guide hole provided in a guide piece of the support body; and the first locking body A second spring fitted between the body and the second locking body, and a first spring inserted between the support arms and secured to the headrest bracket with one end secured to the headrest bracket And
The medium means for locking to the lifting body is connected to the drive main unit device via a pulley provided on the support body from the first locking body and the second locking body, and the locking means,
An active configuration in which the operation of the driving main unit, the start of the operation of the medium means based on this operation, and the operation of the lifting / lowering device are performed by this operation, and the headrest support and the headrest are lifted and tilted forward. Headrest lifting device for headrest. A headrest lifting device for an active headrest according to claim 1,
Lifting and lowering the headrest for the active headrest, which is configured to complement the lifting and lowering of the headrest support and the moving distance of the medium means and secure the rising of the headrest through a first spring inserted between the support arms of the movable body. apparatus. A headrest lifting device for an active headrest according to claim 1,
The return of the lifting body of the lifting device is a first locking body provided substantially at the center of the lifting body, and a second locking that is tubular and receives the first locking body and is suspended from the upper surface of the support body. Composed of body and
The first locking body includes one or several flexible guide rails and a second spring locking pressing piece provided on the guide rails.
The second locking body is provided with one or several guide grooves for receiving the guide rails, and a curved surface provided on the inner wall surface of the guide grooves,
A headrest lifting device for an active headrest in which the guide rail and / or the pressing piece of the first locking body are recessed in the second locking body in accordance with the rising of the first locking body. A headrest lifting device for an active headrest according to claim 1,
The first locking body is composed of a tubular main body standing from the lifting body, a guide rail standing from the opposite direction of the main body, and a pressing piece projecting from a vertical surface in the longitudinal direction of the guide rail. ,
A headrest lifting device for an active headrest configured to ensure a clearance between the upper surface of the pressing piece of the first locking body and the lower surface of the second spring at the time of initializing. A pressing piece and a second spring of a headrest lifting device for an active headrest according to claim 5,
The pressing piece of the first locking body sinks into the second locking body as the elevating body rises, and the second spring is locked from the pressing piece, and the second locking body A headrest lifting device for an active headrest configured to be held by a first projection and a second projection on the upper and lower surfaces. A headrest lifting device for an active headrest according to claim 1,
A guide piece is projected in the front direction of the main body through a bracket extending from the main body of the support body, a guide hole is formed in the guide piece, and a locking pin of the elevating body is engaged with the guide hole. A headrest lifting device for an active headrest configured to be combined. A headrest lifting device for an active headrest according to claim 7,
A headrest lifting device for an active headrest, wherein a third spring is interposed between a resin bush provided in the guide hole and the guide hole. A headrest lifting device for an active headrest according to claim 1,
The lifting / lowering body of the lifting / lowering device is returned from the upper surface of the first locking body provided with a hollow portion provided substantially at the center of the lifting / lowering body and the support inserted into the hollow portion of the first locking body. With a second locking body to be installed,
This first locking body is provided with a pair of hook pieces and a small hole for inserting a second spring provided in the hook piece,
In addition, a first protrusion for locking the second spring is provided on the second locking body,
A headrest lifting device for an active headrest, wherein the first locking body is inserted into the second locking body when the first locking body is raised. A headrest lifting device for an active headrest according to claim 1,
A headrest lifting device for an active headrest configured to support a second spring provided on the first locking body with a gap between the pair of flanges. A headrest lifting device bush for an active headrest according to claim 1,
The headrest bracket is configured to support via a bush of a support arm provided on the movable body,
By adopting this configuration, the headrest bracket is inserted from the tube portion, and at the time of the insertion, a first spring is mounted on the tube portion, and after the mounting, the first spring is mounted on the support arm. A headrest lifting device for an active headrest configured to be insertable. A second locking body of the headrest lifting device for an active headrest according to claim 1,
The second locking body is a headrest lifting device for an active headrest in which a locking protrusion provided on the upper end of the second locking body can be fitted to a rib piece protruding from the movable body with one touch. A headrest device for a headrest lifting device for an active headrest according to claim 1,
A headrest lifting device for an active headrest in which the headrest bracket and a headrest support are integrated. A drive main body device for a headrest lifting device for an active headrest according to claim 1,
The drive main device includes a main body provided on the frame, a pressure receiving part provided movably on a pivot provided on the main body part, and a movable part equipped with a wire operated by a link mechanism provided on the pressure receiving part. Lifting device for headrest for active headrest composed of A support body and a lifting body for a headrest lifting device for an active headrest according to claim 1,
A headrest raising / lowering device for an active headrest having a structure in which a protrusion is provided on a guide piece or bush of the support, and the protrusion is stopped by a locking pin of the elevator.

Images