JP4948065B2 - Headrest device for active headrest - Google Patents

Description

  The present invention relates to a headrest device (active headrest) for an active headrest that protects a person at the time of impact (collision). In this collision, the head (neck is extended) before the head is raised (neck extension). In order to protect the headrest, the headrest is moved upward (raised) and forwardly tilted (forwardly tilted), and the rising and forward tilting state is achieved at high speed. Protect parts. Thus, the present invention relates to a headrest device for an active headrest that avoids whiplash and neck injury.

  As is well known, the evolution of quality required for automobiles (vehicles) changes in the order of emissions → horsepower → fuel consumption → safety → silence → riding comfort, and at the same time responds to various needs of people. Among them, improvement of the function of the headrest is desired due to the importance of safety and the like. For example, an active headrest is put into practical use and an invention that supports the practical use is cited. What is desired for this headrest is that the headrest can surely play a role in such an emergency from the standpoint of suppressing the generation of rattling noise, frequent accidents and / or diversification of collisions. It is an essential requirement.

  However, this headrest eliminates contact with the human head in order to eliminate the passenger's desire and discomfort, and is usually installed so as to be approximately 30 mm to 50 mm away from the head (back of the head). It is in a state of following. However, in an emergency state at the time of impact and / or collision (assumed to be a collision), an unexpected problem is caused because the headrest is separated as described above, and an example thereof will be described.

  That is, in the configuration of the headrest described above, since the back is in contact with the seat back in order to achieve safe and / or comfortable driving, the back is protected at the time of impact, but the head is separated from the headrest. Not protected from. The reason is considered as follows. That is, at the time of the collision, the head is brought upward in vector and the neck is stretched, for example, from a slight injury such as whiplash to a neck injury and / or amputation. A heavy condition occurs and causes great damage to people.

  As described above, various inventions have been proposed in order to avoid whiplash and / or neck injury that occur during a collision. As an example, literatures are listed below. Unfortunately, however, a headrest device for an active headrest that rises instantaneously a predetermined distance and tilts forward is not necessarily considered sufficient.

  First, as the document (1), there is “Automobile seat” disclosed in Japanese Patent Application Laid-Open No. 2000-219069. The outline is an upper pipe provided on each seatback frame, a pipe frame that is attached to and fixed to the upper pipe and that can be attached to and removed from the upper pipe, and a forward inclination of the pipe frame. A headrest support frame and a pressure receiving portion provided on the support frame and a frame for tilting the headrest forward are configured. Accordingly, the pressure of the pressure receiving portion moves the support frame and the pipe frame, and the seat back is raised and tilted forward. Through this series of operations, during the rear-end collision, the amount of movement of the pressure receiving part due to the rearward movement of the passenger's upper body is ensured, so that the moving distance to the front of the headrest can be increased, or through the above-described simple configuration. To achieve the above effects.

  Next, as literature (2), there is "Automobile seat" of JP-A-2000-21114. The outline is a structure in which the headrest support frame of the headrest is provided at the upper end portion of the lever / link mechanism fixed to the seat back frame, and this lever / link mechanism is attached to the pressure receiving portion that moves under the load at the time of impact. It is composed of a lever that swings up and down in conjunction, 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, The movement amount of the pressure receiving part is increased, and the headrest support frame and the headrest are moved obliquely forward and upward to avoid the harmful effects due to the rising of the head.

  Further, as the document (3), there is a “vehicle seat” disclosed in JP-A-11-34708. The outline is that two load receiving members consisting of an upper load receiving member and a lower load receiving member are arranged in the seat back, and a link mechanism that operates through the movement of the load receiving member is provided. The headrest is raised in response to the movement of the receiving member, and the link mechanism operates by connecting the first link arm to the third link arm, and the headrest and / or the headrest is raised in a space-saving manner. Stroke and ascend forward to avoid harmful effects based on head rise.

JP2000-219069 JP2000-2111410A JP-A-11-34708

  Since the document (1), as a general rule, intends to increase the moving distance of the forward tilt, for example, it is considered that consideration for the head rise is lacking. Some points should be improved.

  Documents (2) and (3) intend to raise the headrest to the front side and to comprehensively protect the movement of the head at the time of collision. However, with this configuration, there is room for improvement in the ascending distance and the ascending speed in order to positively raise and forward tilt the headrest and comprehensively protect the head movement at the time of collision. In addition, when considering the movement of the head at the time of collision and ensuring a rise and / or descent with good responsiveness, it is not necessarily considered sufficient, and there is room for improvement.

  In addition, there is no active headrest that accurately corresponds to the head movement at the time of collision, regardless of the body shape of the passenger or the sitting posture. In addition, there are currently no inventions and / or products that improve the safety and security of passengers or ensure the comfort of driving and driving, etc., with various improved active headrest configurations. It is. These improvements are intended by the present invention, and the following features are intended.

  That is, an object of the present invention is to achieve the following “1” to “5”.

  “1” First, the present invention is an active headrest which is composed of an elevating device embedded in a seat back and configured to raise and forward and provided on a frame of the seat back and a driving main device. The headrest that protects the head (neck) can be raised and tilted at a high speed before the head is raised and / or the neck is extended (the headrest before the head rises after a collision) Proposes a headrest device for an active headrest having a configuration that can avoid whiplash, avoid neck injury, etc.

  “2” In principle, the function of the headrest can be maintained even if the vehicle is partially damaged, the headrest can be lowered and the headrest can be reused, or the responsiveness can be increased.・ We propose a headrest device for an active headrest that is intended to ensure descent and forward tilt, etc., and that can be put to practical use.

  “3” In the present invention, the driving main body device and the lifting device are connected via a medium means (one or preferably several wires), and the lifting device is operated in accordance with a command of the driving main device. A headrest device for an active headrest is proposed in which the headrest is lifted and tilted forward by the action of the device, and can be lifted and tilted instantaneously (at high speed).

  “4” Regardless of the body type of the passenger (height, weight, weight, etc.) or sitting posture, in other words, the head can be protected appropriately in all conditions. The present invention proposes a headrest device for an active headrest that is configured to ensure safety and security, or to ensure driving and driving comfort.

  “5” For example, in the case of various sensors such as a collision sensor, the conventional problem can be eliminated by raising the headrest and tilting forward even in a situation where the passenger cannot predict by the function of this sensor. A headrest device for an active headrest with a configuration is proposed.

  The invention of claim 1 is intended to achieve the objects described in the above-mentioned “1” to “4”.

Claim 1 is a headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (upward) of the headrest and forward inclination (forward inclination),
This ascending / forward tilting mechanism
Elevating device provided on the frame and / or intermediate member of the vehicle, a frame for releasing the locking of the elevating device and / or a locking device provided on the intermediate member, a frame carrying the movement of the elevating device, and / or A drive main unit provided on the intermediate member, and one medium connected to the drive main unit and the other connected to the lifting device, or medium means constituted by a suspension member,
Also, this headrest device
A headrest bracket provided in the lifting device, a headrest support inserted in the headrest bracket, a headrest stay loosely fitted in the headrest support, and a headrest provided in the headrest stay,
The headrest for the active headrest that releases the locking of the lifting device by the locking device by the operation of the driving device, operates the lifting device, and raises and tilts the headrest by operating the lifting device. In the device
The lifting device is
Locked to a support provided on the frame and / or intermediate member, a movable derivative movably provided on the support via a pivot means, and a lifting rod provided to be movable up and down on a pipe portion of the movable derivative. And the first moving piece and / or the second moving piece, the first spring and / or the second spring, and the guiding means (the guide with the long hole) for controlling the moving body and the lifting and lowering lift and forward tilt. Arm portion, pin and / or bracket piece portion) and a headrest bracket provided on the lifting rod ,
In addition, the drive main unit is movably locked to the receiving portion having an uneven portion integrally provided on the frame and / or the intermediate member, and can be fitted to the receiving portion. A movable fitting portion having a provided concave and convex portion, and the medium means inserted between the receiving portion and the movable fitting portion,
Furthermore, the locking device comprises a cylinder portion provided in the first moving piece, a locking piece provided in the cylinder portion, and an actuator for controlling the locking piece, A headrest device for a headrest.

  The invention of claim 2 is intended to achieve the object of claim 1 and to provide a drive main body device in a headrest device for an active headrest stay that is optimal for achieving the object.

Claim 2 is a headrest device for an active headrest according to claim 1,
A claw portion provided on the arm piece of the movable fitting portion is inserted and locked in a long hole provided in the flat portion of the receiving portion constituting the drive main device, and the movable fitting portion is a flat portion of the receiving portion. It is a headrest device for an active headrest, characterized in that it is configured to be movable by being guided by the head.

  The inventions of claims 3 and 4 are intended to achieve the object of claim 1 and to provide medium means in a headrest device for an active headrest that is optimal for achieving the object.

Invention of Claim 3 is the headrest apparatus for active headrests of Claim 1, Comprising:
A headrest device for an active headrest, wherein the medium means is opened (relaxed) and / or tensioned by a locking piece and an elastic body (spring) that urges the locking piece. is there.

Claim 4 is a headrest device for an active headrest according to claim 1,
A headrest device for an active headrest, characterized in that the medium means is composed of two, and a drive main device is provided as a pair following the medium means.

The invention of claim 1 is a headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (rise) and forward inclination (forward inclination) of the headrest,
Ascending and tilting mechanism,
Elevating device provided on vehicle frame and / or intermediate member, frame for releasing lifting device and / or locking device provided on intermediate member, and frame and / or intermediate member carrying movement of elevating device The drive main unit provided in the medium, and one medium connected to the drive main unit and the other connected to the lifting device, or medium means constituted by a suspension member,
The headrest device
It consists of a headrest bracket provided on the lifting device, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted on the headrest support, and a headrest provided on the headrest stay.
In the headrest device for an active headrest that releases the locking to the lifting device by the locking device by the operation of the driving main device, operates the lifting device, and raises and tilts the headrest by operating the lifting device,
The lifting device
Movement supported by a support provided on the frame and / or intermediate member, a movable derivative provided movably on the support via a pivoting means, and a lifting rod provided on the pipe of the movable derivative so as to be movable up and down Body, the first moving piece and / or the second moving piece, and the first spring and / or the second spring, and the guiding means (the guide arm portion with a long hole, the pin) And / or a bracket piece part) and a headrest bracket provided on the elevating rod ,
In addition, the drive main unit is provided with a receiving portion having an uneven portion integrally provided on the frame and / or the intermediate member, and a convex and concave portion that is movably locked to the receiving portion and that can be fitted to the receiving portion. A movable fitting portion comprising: a medium means inserted between the receiving portion and the movable fitting portion;
Further, the locking device comprises a cylinder portion provided in the first moving piece, a locking piece provided in the cylinder portion, and an actuator for controlling the locking piece, and for an active headrest characterized in that It is a headrest device.

  Therefore, claim 1 has the following features.

  “1” An active headrest that is embedded in a seat back and is composed of an elevating and lowering device provided on the seat back frame for controlling ascending and forward tilting and a driving main body. At the time of the collision, the head is lifted and / or The headrest that protects the head (neck) can be raised and tilted at high speed before the neck stretches (after the collision, the headrest is As a configuration in an inclined state (hereinafter the same), it is possible to avoid whiplash and avoid neck injury.

  “2” And, in principle, the function of the headrest can be maintained even if the vehicle is partially damaged, the headrest can be lowered, and the headrest can be reused, or the responsiveness can be increased. It is a configuration that can ensure the descent and forward tilt and can be put to practical use.

  “3” Further, the driving main body device and the lifting device are connected via a medium means (one or preferably several wires), and the lifting device is operated by the command of the driving main device. The headrest is lifted and tilted forward, and the headrest can be lifted and tilted instantaneously (at high speed).

  “4” Regardless of the body type of the passenger (height, weight, weight, etc.) or sitting posture, in other words, the head can be protected appropriately in all conditions. In addition, it is a configuration that can ensure safety and security, or ensure driving and driving comfort.

  “5” For example, in the case of various sensors such as a collision sensor, the conventional problem can be eliminated by raising the headrest and tilting forward even in a situation where the passenger cannot predict by the function of this sensor. It is a configuration.

Invention of Claim 2 is the headrest apparatus for active headrests of Claim 1, Comprising:
The claw portion provided on the arm piece of the movable fitting portion is inserted and locked in the long hole provided in the flat portion of the receiving portion constituting the drive main unit, and the movable fitting portion is guided to the flat portion of the receiving portion. It is a headrest device for an active headrest characterized by being configured to be movable.

  Accordingly, the second aspect has the characteristics that the object of the first aspect can be achieved, and the drive main body apparatus in the headrest device for the active headrest that is optimal for achieving the object can be provided.

Invention of Claim 3 is the headrest apparatus for active headrests of Claim 1, Comprising:
An active headrest headrest device characterized in that the medium means is opened (relaxed) and / or tensioned by a locking piece and an elastic body (spring) that biases the locking piece.

Invention of Claim 4 is the headrest apparatus for active headrests of Claim 1, Comprising:
The headrest device for an active headrest is characterized in that the medium means is composed of two and the drive main body device is provided in a pair following the medium means.

  Accordingly, claims 3 and 4 have the characteristics that the object of claim 1 can be achieved and the medium means in the headrest device for an active headrest that is optimal for achieving the object can be provided.

  An example of the present invention will be described.

  Referring to the drawings, FIG. 1-1 is an overall scale side view showing an example of a seat back of a vehicle (automobile) provided with a first draft seat, FIG. 1-2 is a cross-sectional view of FIG. FIG. 1-3 is an overall scale side view showing an example of a seat back of a vehicle provided with a second proposal seat (a configuration in which convex portions are substantially provided around the seat), and FIG. 1-5 is an overall scale side view showing an example of a seat back of a vehicle provided with a seat of the third plan (a configuration in which convex portions are provided in the longitudinal direction of the seat), and FIGS. It is a cross-sectional view of FIGS. 1-5.

  FIG. 2-1 is a schematic side view of a configuration suitable for each seat of the first to third proposals, conceptually showing the relationship between the normal seat back and the active headrest, and FIG. It is the side surface schematic diagram of the structure suitable for each seat of said 1st plan-3rd plan which showed notionally the relationship between the seat back and active headrest.

  3-1 is a front view of the lifting device for the active headrest shown in FIG. 2-1, FIG. 3-2 is a front view of another lifting device for the active headrest shown in FIG. 2-1, and FIG. It is a front view of other raising / lowering apparatus of the active headrest shown to 2-1.

  Next, FIG. 4-1 is a schematic front view showing the relationship between the lifting device and the headrest bracket of the first embodiment (attachment method from the “traveling direction of the automobile” in front of the second moving piece), and FIG. Fig. 4-1 is a plan view, Fig. 4-3 is a bottom view of Fig. 4-1, Fig. 4-4 is a side view of Fig. 4-1, and Fig. 4-5 is a second embodiment (from the rear of the second moving piece). 4) is a plan view of FIG. 4-5, FIG. 4-7 is a bottom view of FIG. 4-5, and FIG. 4-8. Fig. 4-5 is a side view of Fig. 4-5, and Fig. 4-9 is a schematic side view of the third embodiment showing the relationship between the headrest bracket and the lifting device provided with one pulley mechanism in the first and second embodiments described above. FIG. 4-10 is a fourth embodiment of the lifting device and the headrest bracket in which another pulley mechanism is added to the first and second embodiments described above. Schematic side view showing the engagement, Figure 4-11 is a schematic front view showing a configuration in which the spring elevation rod of Figure 4-1.

  FIG. 5A is an example for the purpose of extending the moving distance of the medium means, and is a front view showing the structure of a pulley provided with a central axis, FIG. 5B is a cross-sectional view of FIG. FIG. 6A is another example for the purpose of extending the moving distance of the medium means, and is a front view showing the structure of a pulley having an eccentric shaft, and FIG. 6B is a cross-sectional view of FIG. It is.

  FIGS. 7-1 to 7-3 show an example of the drive main unit. FIG. 7-1 shows a receiving part provided in a part of the frame and a movable fitting part inserted into the receiving part. 7-2 is an exploded perspective view of the principal part, FIG. 7-2 is a perspective view of the principal part in a state where the medium means is relaxed in the fitted state of FIG. 7-1, and FIG. FIG. 8 is an exploded perspective view showing an example in which FIGS. 7-1 are provided as a pair. FIG.

  FIG. 9 is a cross-sectional view showing an example in which the connection between the main body bracket of the movable derivative and the support piece of the support pair is assembled by a fitting method.

  10-1 to 10-3 are enlarged cross-sectional views showing the relationship between the wire employed as an example of the medium means and the bush (stopper) of the wire, and FIG. FIG. 10-2 shows a caulking method, and FIG. 10-3 shows a press fitting method.

  11A is a cross-sectional view showing the connection between the holding part of the support and the support member of the frame, and FIG. 11B is a cross-sectional view showing the main part of FIG.

  FIG. 12 is a scale side view showing an example of a sensor for detecting a collision, an impact, etc. installed in an automobile.

  First, a basic configuration common to each embodiment will be described. The present invention is an active headrest B mounted on a seatback A1 constituting a seat A of an automobile, and the active headrest B is a seatback A1. A metal frame 1 embedded in the frame 1, a drive main unit C provided at the lower end of the frame 1, connected to the drive main unit C, and provided from below to above the frame 1 (seat back A 1). Medium means D (referred to as wire 48), a lifting device E connected to the medium means D and provided above the frame 1, and locking (regulation of stopping, etc.) of the lifting device E and / or Alternatively, the locking device G that opens, the collision sensor H that controls the operation of the locking device G provided as necessary, and the lifting device E, the locking device G, and the medium means D are lifted by the action. The headrest device I provided in the frame 1 comprises a head rest (to be described later) that enables Kashiga before a main component. Incidentally, the collision sensor H is provided at an appropriate position of the vehicle.

  “I” The lifting device E will be described with reference to FIGS. 2-1, 2-2, and FIGS. 4-1 to 4-8.

  The structure includes a support body 2 provided with a pair of guide arms 200 on the back side (behind the seat back A1) provided to be locked or held on the frame 1, and a pivot provided on the support body 2 in pairs. Movable derivative 4 provided with pivotal support 400 pivotally attached to support means 3, space 5 and / or cylinder 405 provided in movable derivative 4, and movable to space 5 and / or cylinder 405 The first moving piece 7 and / or the second moving piece 8 provided on the first moving piece 7, the first spring 70 provided between the first moving piece 7 and the second moving piece 8, the second moving piece 8 and the space portion. The movable spring 4 is connected to the second spring 80 provided between the first movable piece 7 and / or the second movable piece 8 via the bush 11 via the connecting wire 10. A pair of tube portions 401 provided at both ends in the longitudinal direction of the tube, and each tube portion 401 is movable. Each inserted elevating rod 12, a moving body 13 locked to each elevating rod 12, and a back surface of the moving body 13 connected via a pin 14 inserted into the elongated hole 200 a of the guide arm portion 200. The main part is a bracket piece 1300 projecting from the side. As shown in FIGS. 4-4 and 4-8, the elevating device E has a configuration in which the upper portion thereof is inclined to the back side, a configuration conforming to the seat back A1, and the smooth movement of the medium means D. It is intended to increase the moving distance. The locking of the bush 11 and the connecting wire 10 is in accordance with the relationship between the wire and the stopper described later.

  In this configuration, the locking end 3000 of the locking device G that locks the first moving piece 7 in the event of a collision (the locking piece 30 provided on the cylindrical portion 7 a provided in the first moving piece 7) is attached to the movable derivative 4. When engaged / disengaged from the provided locking hole 402, the second spring 80 and / or the first spring 70 rebound, and the second moving piece 8 and / or the first moving piece 7 move in the space 5. At the same time, the medium means D is pulled by the tension of the drive main unit C, which will be described later, and the rising distance of the elevating rod 12 is ensured. This rising distance is converted into a rising headrest (in the direction of arrow “I” in FIGS. 2-1 and 4-5). Then, it is desirable to ensure that the headrest stay and / or the headrest rising distance is at least approximately 40 mm or more instantaneously. It should be noted that the pivotal relationship between the pin 14 that rises while moving to the back side along the long hole 200a of the guide arm 200 during this ascent, and the pivotal means 3 of the support 2 and the pivotal part 400 of the movable derivative 4 is as follows. The movable derivative 4 tilts forward as a fulcrum (in the direction of arrow “b” in FIGS. 2-1 and 4-6).

  A headrest bracket, which will be described later, is connected to the lifting rod 12. In this embodiment, the first moving piece 7 and / or the second moving piece 8 are provided in the space portion 5 via the sleeve 16, and in the example of FIGS. 4-1 to 4-8, the space portion 5 is provided. Is formed by press-molding the main body 403 of the movable derivative 4 to save materials and facilitate assembling. And in the example of FIGS. 4-1-FIGS. 4-4, it is the structure assembled | attached from the front by making the space part 5 into the open front. Moreover, in the example of FIGS. 4-5 to 4-8, it is the structure which makes the space part 5 open the back surface, and is assembled | attached from back. In the figure, reference numeral 404 denotes a guide piece of the medium means D provided at the bracket portion and has a substantially arch shape.

  FIG. 9 is a cross-sectional view showing an example in which the connection between the bracket 403a provided on the main body 403 of the movable derivative 4 and the support piece 201 of the support body 2 is assembled by a fitting method. The press-molding convex part of the support piece 201 is fitted into the hole and assembled and integrated. This method is characterized by versatility such as one-touch assembly and / or robot assembly, as well as simplicity, resource saving, and cost reduction.

4-9 and 4-10 show a pulley 20 employed as an auxiliary to the lifting device E and / or the driving main device C. The medium means D is guided through the pulley 20 and the medium. It is intended to increase the moving distance of the means D. 4-9 guides the medium means D through the pulley 20 pivotally supported at the center of the main body 403. 4-10 intends to increase the moving distance of the medium means D via the pulley 20 eccentrically supported by the main body 403. In addition, an example which expands this movement distance is shown as a continuous line in FIG. 4-10. In the figure, 21 indicates a groove, and 22 indicates a branch piece. In the example of FIG. 4-10, the movement distance can be greatly expanded in relation to the drive main unit C.

  Next, the locking device G will be described based on FIGS. 4-4 and 4-8.

  The locking device G in this example is configured such that the locking end 3000 of the locking piece 30 is engaged with and disengaged from the locking hole 402 provided in the movable derivative 4. The medium means D is penetrated. The locking piece 30 is configured to be biased in the locking direction via a spring 32. Further, the locking device G may be configured to be engaged / disengaged via a sensor 33 that detects a collision, an impact, or the like installed in the automobile shown in FIG. And the example of this FIG. 12 has the characteristics which can aim at the accuracy and quickness of the raise of the headrest mentioned later, and forward tilt. In addition, although the locking device G is not shown, the locking device G can be flexibly supported by a configuration of a locking ball, an actuator, or the like.

  “Ha” First, the drive main unit C will be described.

  In the example of FIGS. 7-1 to 8, the frame 1 and / or the intermediate member 100 (this intermediate member 100 is a small size having a width of about half the width of the frame 1. To achieve miniaturization, weight reduction, etc. (hereinafter the same) (referred to as “Frame 1”), a substantially box-shaped receiving portion 41 provided with a plurality of elongated holes 40 and an opening provided on the receiving portion 41 are provided. A guide fitting 4100, a convex portion 4101 and a movable fitting that is movably fitted to the receiving portion 41 and that has a claw portion 4300 that is inserted and locked into the elongated hole 40 and is open on one side. It comprises a portion 43, a convex portion 4301 provided in the movable fitting portion 43, and a guide concave portion 4302. The receiving portion 41 is provided with flat portions 4102 for forming the long holes 40 on the upper and lower sides. The lower flat portion 4102 functions as a receiver for the movable fitting portion 43. The claw portion 4300 is inserted into the long hole 40 so as to bend the arm piece 4300a of the movable fitting portion 43, and is locked to both ends of the long hole 40 through the reaction force. Since it is such a configuration, it can be easily assembled through means such as a robot, and has features such as being useful, contributing to simplification of work or cost reduction.

  The guide recess 4100 and the projection 4101 provided in the receiving portion 41 are fitted with the projection 4301 and the guide recess 4302 of the movable fitting portion 43, respectively. Hold by locking with the part. And through this fitting, it is between the guide recessed part 4100 and the convex part 4101 of the said receiving part 41, and the convex part 4301 and the guide recessed part 4302 of the movable fitting part 43, and is the long hole 40 of the flame | frame 1. And the medium means D provided through the notch 4304 of the movable fitting portion 43 is tensioned or relaxed (described later). That is, the moving piece and / or the moving body (described later) of the lifting device E is held at the ascending limit by this tension, and the lifting device E is held at the descending limit by being relaxed. Therefore, at the rising limit of the lifting device E, the headrest (described later) of the headrest device I is lifted and tilted forward, and at the lowering limit of the lifting device E, the headrest is lowered in the normal use state (after rising) ) And vertical installation (after tilting forward).

  7-2 shows the relaxed state of the medium means D, and FIG. 7-3 shows the tensioned state of the medium means D. Then, the process from the relaxed state (relaxed state) of the medium means D in FIG. 7-2 to the tensioned state (assumed state) of the medium means D in FIG. 7-3 will be described in order. As shown in 7-2, the guide concave portion 4100 and the convex portion 4101 of the receiving portion 41 are separated from the convex portion 4301 and the guide concave portion 4302 of the movable fitting portion 43, and the relaxed state is a normal state. Accordingly, the headrest (described later) is also in a normal position and is separated from the head. When the movable fitting portion 43 is pressed by the impact of the occupant's body at the time of the collision, the movable fitting portion 43 is pressed in the direction of the arrow “c” and is inserted into the receiving portion 41, and the nail The portion 4300 moves along the long hole 40. Thereby, the guide concave portion 4100 and the convex portion 4101 of the receiving portion 41 and the convex portion 4301 and the guide concave portion 4302 of the movable fitting portion 43 are brought into close contact with each other, and the fitting of the movable fitting portion 43 and the receiving portion 41 is ensured. At the same time, the medium means D is pulled (tensioned) in the direction of the arrow “d”, and the moving length (movement distance) of the medium means D in the direction of the arrow “d” can be secured by this pulling. The movement length (movement distance) of the medium means D is a movement due to a synergistic effect of the movement (distance) of the first moving piece 7 and the second moving piece 8 of the elevating device E. And / or the movable derivative 4 tilts forward (the lifting device E operates). The headrest is lifted and / or tilted forward through the lifting / lowering rod 12 and / or the forward tilting of the movable derivative 4.

  In order to shift (return) from the tensioned state shown in FIG. 7-3 to the relaxed state shown in FIG. 7-2, for example, the headrest is pushed down and the spring 32 of the locking device G is compressed, or The sensor 33 is turned on. As a result, the medium means D returns (relaxes) and moves in the direction of the arrow “e”. At the time of this movement, the movable fitting portion 43 is released and moves in the direction of the arrow “to”. The movable fitting portion 43 moves, and as shown in the figure, the convex portion 4301 and the guide concave portion 4302 of the movable fitting portion 43 are separated from the guide concave portion 4100 and the convex portion 4101 of the receiving portion 41, and this movable fitting portion 43. A gap is formed between the convex portion 4301 and the guide concave portion 4302, and between the guide concave portion 4100 and the convex portion 4101 of the receiving portion 41, and the state shown in FIG. Further, the headrest returns to the normal state through the lifting / lowering rod 12 or the return (lowering) of the first moving piece 7 and the second moving piece 8 of the lifting device E. Thereby, the standby state at the time of a collision is ensured.

  In the above example, the receiving portion 41 and the movable fitting portion 43 are configured independently in the frame 1, but a configuration in which a plurality of receiving portions 41 and a movable fitting portion 43 are provided as shown in FIG. Further, the movable fitting portion 43 can be moved via a pressing plate and a pressure receiving plate (not shown).

  In this example, the receiving part 41 is configured integrally with the frame 1 and is intended to improve economy and / or accuracy, improve assembly, and automate. However, the receiving part 41 is created individually, A structure that is attached to the frame 1 or the like is also possible. In addition, this drive main unit C adopts a structure having a width of about ¼ of the width of the frame 1, thereby achieving downsizing and / or weight reduction / simplification of the apparatus, or substantially It is intended to be able to be installed in a vehicle type (also considered in other devices). Even if there is a change in the pressing direction, a reliable movement of the medium means D can be guaranteed by providing a pressing plate or the like (the medium means D is a plurality of examples). Although not shown, the receiving portion 41 and the movable fitting portion 43 may have a set of structures. In this example, the medium means D is single (one).

In the figure, reference numeral 4104 denotes a reinforcing portion. The flat portion 4102 is intended to reinforce the frame 1 and ensure a long movement stroke of the movable fitting portion 43, and to facilitate the movement of the movable fitting portion 43 and increase the movement distance of the medium means D. It is also possible to make it wide.

  Further, guide grooves 4103 and 4303 for the medium means D are provided on the convex part 4101 (guide concave part 4100) of the receiving part 41 or the convex part 4301 (guide concave part 4302) of the movable fitting part 43, and the medium means D is surely moved. It is desirable to guarantee.

  “Ni” Next, the headrest device I will be described with reference to FIGS. 2-1, 2-2, 3-1, and 3-2.

  This configuration includes a headrest bracket 51 provided on the connecting piece 120 provided on the lifting rod 12 of the lifting device E, a headrest support 52 inserted into the headrest bracket 51, a headrest stay 53 provided on the headrest support 52, A headrest 54 provided on the headrest stay 53 is configured, and the headrest support 52 and / or the headrest 54 employs a general-purpose product to make components common and / or modular. And this headrest bracket 51 and the raising / lowering rod 12 in the said pipe part 401 are integrated, and the said headrest bracket 51 follows the raising / lowering of this raising / lowering rod 12. FIG.

As described above, the operation is a movement due to a synergistic effect of the movement (distance) of the first moving piece 7 and the second moving piece 8 of the lifting device E, and the lifting rod 12 is lifted and / or the movable derivative 4 is tilted forward. To do. The raising of the lifting rod 12 and / or the forward tilting of the movable derivative 4 results in the raising and / or forward tilting of the headrest bracket 51. Accordingly, the headrest support 52 and the headrest 54 provided on the headrest bracket 51 are raised and / or tilted forward.

  In this example, the headrest 54 is lowered by pressing the headrest 54. For example, when the headrest 54 is lowered, the wire 48 is first relaxed, and then and / or substantially simultaneously. The return of the movable derivative 4 or the lifting / lowering rod 12 is performed, and the locking of the locking device G to the first moving piece 7 and the removal of the movable fitting portion 43 from the receiving portion 41 are performed. . By these operations, the entire headrest device I is restored.

  FIGS. 10-1 to 10-3 are examples illustrating the fixing relationship between the wire 48 and the stopper 49. FIG. 10-1 shows a method using screwing, and FIG. 10-2 shows a method using caulking. FIG. 10-3 shows a method by press fitting, respectively.

  FIG. 11A is a cross-sectional view showing the connection between the holding portion 202 of the support body 2 and the support member 101 of the frame 1, and an example of a configuration that can support the support body 2 reliably and with one touch. Is described. FIG. 11B is a cross-sectional view showing the main part of FIG.

FIG. 1-1 is an overall scale side view showing an example of a seat back of a vehicle (automobile) provided with the seat of the first plan. 1-2 is a cross-sectional view of FIG. 1-1. FIG. 1-3 is an overall scale side view showing an example of a seat back of a vehicle provided with the seat of the second plan (a configuration in which a convex portion is substantially provided around the seat). 1-4 is a cross-sectional view of FIG. 1-3. FIG. 1-5 is an overall scale side view showing an example of a seat back of a vehicle provided with a third proposal seat (a configuration in which a convex portion is provided in the longitudinal direction of the seat). 1-6 is a cross-sectional view of FIG. 1-5 FIG. 2-1 is a schematic side view of a configuration suitable for each seat of the above-mentioned first to third proposals, conceptually showing the relationship between the normal seat back and the active headrest. FIG. 2-2 is a schematic side view of a configuration suitable for each seat of the first to third plans, conceptually showing the relationship between the seat back at the time of collision and the active headrest. FIG. 3-1 is a front view of the lifting device for the active headrest shown in FIG. 3-2 is a front view of another lifting device of the active headrest shown in FIG. 3-3 is a front view of still another lifting device of the active headrest shown in FIG. FIG. 4-1 is a schematic front view showing the relationship between the lifting device and the headrest bracket in the first embodiment (attachment method from the “traveling direction of the automobile” in front of the second moving piece). 4-2 is a plan view of FIG. 4-1. 4-3 is a bottom view of FIG. 4-4 is a side view of FIG. FIG. 4-5 is a schematic front view showing the relationship between the lifting device and the headrest bracket of the second embodiment (attachment method from the rear of the second moving piece). 4-6 is a plan view of FIG. 4-5 4-7 is a bottom view of FIG. 4-5 4-8 is a side view of FIG. 4-5 FIG. 4-9 is a schematic side view showing the relationship between the headrest bracket and the lifting device provided with one pulley mechanism in the first and second embodiments described above in the third embodiment. FIG. 4-10 is a schematic side view showing the relationship between the headrest bracket and the lifting device provided with another pulley mechanism in the first and second embodiments described above in the fourth embodiment. FIG. 4-11 is a schematic front view showing a configuration in which a spring is provided on the lifting rod of FIG. 4-1. FIG. 5-1 is an example for the purpose of extending the moving distance of the medium means, and is a front view showing the structure of a pulley provided with a central axis. 5-2 is a cross-sectional view of FIG. FIG. 6A is another example for the purpose of extending the moving distance of the medium means, and is a front view showing the structure of a pulley provided with an eccentric shaft. 6-2 is a cross-sectional view of FIG. FIG. 7-1 is an exploded perspective view of a main part, showing a receiving part provided in a part of the frame and a movable fitting part inserted into the receiving part. FIG. 7-2 is a perspective view of a principal part in a state where the medium means is relaxed in the fitted state of FIG. FIG. 7-3 is a perspective view of a main part in a state where the medium means is tensioned in the fitted state of FIG. FIG. 8 is an exploded perspective view showing an example in which FIG. FIG. 9 is a cross-sectional view showing an example in which the connection between the movable body bracket and the support piece of the support pair is assembled by a fitting method. FIG. 10A is an enlarged cross-sectional view showing a relationship between a wire employed as an example of the medium means and a bush (stopper) of the wire (method using screwing). FIG. 10-2 is an enlarged cross-sectional view showing a relationship (a method by caulking) between a wire employed as an example of the medium means and a bush (stopper) of the wire. FIG. 10-3 is an enlarged cross-sectional view showing a relationship (method by press fitting) between a wire employed as an example of the medium means and a bush (stopper) of the wire. FIG. 11-1 is a cross-sectional view illustrating the connection between the holding portion of the support and the support member of the frame. 11-2 is a cross-sectional view showing the main part of FIG. FIG. 12 is a scale side view showing an example of a sensor for detecting a collision, an impact, etc. installed in an automobile.

A Seat A1 Seat back B Active headrest C Drive main device D Medium means E Lifting device G Locking device H Collision sensor I Headrest device 1 Frame 100 Intermediate member 101 Support member 2 Support body 200 Guide arm part 200a Long hole 201 Support piece 202 Holding portion 3 Pivoting means 4 Movable derivative 400 Pivoting portion 401 Pipe portion 402 Locking hole 403 Main body 403a Bracket 404 Guide piece 405 Tube portion 5 Space portion 7 First moving piece 7a Tube portion 70 First spring 8 Second moving piece 80 Second spring 10 Connecting wire 11 Bush 12 Lifting rod 120 Connecting piece 13 Moving body 1300 Bracket piece 14 Pin 16 Sleeve 20 Pulley 21 Groove 22 Branch piece 30 Locking piece 3000 Locking end 3001 Through hole 32 Spring 33 Sensor 40 Long Hole 41 Receiving part 4100 Guide concave part 41 1 convex portion 4102 flat portion 4103 guide groove 4104 reinforcing portion 43 movable fitting portion 4300 claw portion 4300a arm piece 4301 convex portion 4302 guide concave portion 4303 guide groove 4304 notch 48 wire 49 stopper 51 headrest bracket 52 headrest support 53 headrest stay 54 Headrest

Claims (4)

A headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (rise) and forward tilt (forward tilt) of the headrest,
This ascending / forward tilting mechanism
Elevating device provided on the frame and / or intermediate member of the vehicle, a frame for releasing the locking of the elevating device and / or a locking device provided on the intermediate member, a frame carrying the movement of the elevating device, and / or A drive main unit provided on the intermediate member, and one medium connected to the drive main unit and the other connected to the lifting device, or medium means constituted by a suspension member,
Also, this headrest device
A headrest bracket provided in the lifting device, a headrest support inserted in the headrest bracket, a headrest stay loosely fitted in the headrest support, and a headrest provided in the headrest stay,
The headrest for the active headrest that releases the locking of the lifting device by the locking device by the operation of the driving device, operates the lifting device, and raises and tilts the headrest by operating the lifting device. In the device
The lifting device is
Locked to a support provided on the frame and / or intermediate member, a movable derivative movably provided on the support via a pivot means, and a lifting rod provided to be movable up and down on a pipe portion of the movable derivative. And the first moving piece and / or the second moving piece, the first spring and / or the second spring, and the guiding means (the guide with the long hole) for controlling the moving body and the lifting and lowering lift and forward tilt. Arm portion, pin and / or bracket piece portion) and a headrest bracket provided on the lifting rod ,
In addition, the drive main unit is movably locked to the receiving portion having an uneven portion integrally provided on the frame and / or the intermediate member, and can be fitted to the receiving portion. A movable fitting portion having a provided concave and convex portion, and the medium means inserted between the receiving portion and the movable fitting portion,
Furthermore, the locking device comprises a cylinder portion provided in the first moving piece, a locking piece provided in the cylinder portion, and an actuator for controlling the locking piece, Headrest device for headrest.
A headrest device for an active headrest according to claim 1,
A claw portion provided on the arm piece of the movable fitting portion is inserted and locked in a long hole provided in the flat portion of the receiving portion constituting the drive main device, and the movable fitting portion is a flat portion of the receiving portion. A headrest device for an active headrest, wherein the headrest device is configured to be movable by being guided by the head.
A headrest device for an active headrest according to claim 1,
A headrest device for an active headrest, wherein the medium means is opened (relaxed) and / or tensioned by a locking piece and an elastic body (spring) that urges the locking piece.
A headrest device for an active headrest according to claim 1,
A headrest device for an active headrest, characterized in that the medium means is composed of two, and a drive main body device is provided as a pair following the medium means.

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