JP2015067172A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach components which are otherwise disposed in a seat back to a component for countermeasures to an inner collision and thereby reduce the number of components.SOLUTION: A seat back 12 includes: a seat frame 14 forming a framework of the seat back 12; a guide wire 18 which is disposed spanning the seat frame 14 to support a seat pad 16 receiving a rear surface of a seating person; and an actuator, such as a motor 26, which operates an operation mechanism included in the seat 10. A mat 20 is disposed at a rear side position of the guide wire 18, and at least a rear surface 20a of the mat 20 is formed into a flat plate shape where no protrusion is formed. The actuator is disposed between a front surface 20b of the mat 20 and the seat pad 16 and is directly attached to the mat 20.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat provided with a seat back that can alleviate harm even when a rear passenger collides with the rear surface of the seat back of the front seat at the time of a vehicle collision or the like.

2. Description of the Related Art A vehicle seat such as an automobile includes a seat cushion that serves as a seat for a seated person, a seat back that serves as a backrest for the seated person, and a headrest that supports the head. The seat back in this type of vehicle seat may cause a so-called inward collision of the rear seat person on the rear surface of the front seat back in the event of a vehicle collision. At this time, a sharp-shaped projection is formed on the rear surface of the seat back. Since there is a risk of causing harm to the rear seats, various measures have been taken conventionally.
By the way, a normal seat back includes a seat frame that forms a skeleton of the seat back, a seat pad that receives the back of the seated person and forms an outer shape of the seat back, and supports the seat pad, and spans the seat frame. It is configured with a guide wire or the like arranged. Various operation mechanisms such as a lumbar mechanism are also provided inside the seat back, and an actuator such as a motor for operating the operation mechanism is also provided. An actuator such as a motor is attached and fixed to a guide wire via a bracket. In addition, a wiring harness is routed to an actuator such as a motor inside the seat back, and the wiring harness is also fixed to a nearby component by a clip or the like.
These seat back components, operating mechanism fixtures, and the like may become protrusions to the rear side of the seat back. In order to prevent the rear passengers from being harmed in the internal collision due to this protrusion, conventionally, a felt is applied to the rear surface of the seat cover covering the rear surface of the seat back so that the protrusion protrudes from the rear passenger. In order not to touch, relaxation at the time of contact is aimed at.

JP2013-56612A JP-A-11-216037

As described above, the seat back is provided with components and various fixtures, each of which is fixedly mounted. However, each of the components requires a mounting component, and many components are required for mounting. ing.
Furthermore, in order to prevent these fixtures from becoming protrusions and causing harm to the rear seats in the internal collision, a countermeasure is provided by attaching felt to the seat cover on the rear surface of the seat back. Needed.

  Thus, the present invention was devised in view of the above points, and the problem to be solved by the present invention is to attach a component arranged inside the seat back to a component for countermeasure against internal collision, The purpose is to reduce the number of parts.

In order to solve the above problems, the vehicle seat according to the present invention takes the following means.
A vehicle seat according to a first aspect of the present invention includes a seat frame that forms a skeleton of a seat back, and a guide wire that is arranged over the seat frame to support a seat pad that receives a back surface of a seated person. A vehicle seat provided in a seat back with an actuator for operating an operating mechanism provided in the seat, wherein a mat is disposed at a rear side position of the guide wire, and the actuator is disposed on a front surface of the mat. It is disposed between the seat pad and directly attached to the mat.

According to the above-described present invention, even if the rear seat person makes an internal collision with the rear surface of the seat back of the front seat by the mat disposed at the rear position of the seat back, the danger is mitigated because there is no projection.
In addition, since the actuator such as a motor disposed in the seat back is disposed at the front surface position of the mat, the actuator is blocked by the mat with respect to the rear and does not become a protrusion.
Since the actuator is directly attached to the mat, it is possible to eliminate the need for the bracket when attaching to the guide wire as in the prior art, and to reduce the number of parts of the attachment parts. .

Next, according to a second aspect of the present invention, the mat according to the first aspect described above is characterized in that at least the rear surface is formed in a flat plate shape without projections.
According to the present invention, since the rear surface is formed in a flat plate shape without projections, even if a rear seater hits the rear surface of the front seat back, the harm is further mitigated.

Next, a third invention of the present invention is characterized in that the mat in the first invention or the second invention described above is made of resin and has rigidity.
According to the present invention, since the mat is made of a resin, its manufacture is easy and the weight can be reduced. Further, since the mat is formed with rigidity, it functions effectively against a so-called internal collision.

Next, according to a fourth aspect of the present invention, the guide wire in each of the above-described inventions is disposed in the vertical direction with respect to the seat frame, and is formed in a concave shape inward in the width direction of the seat. The actuator is arranged at the concave shape position.
According to the present invention, since the actuator is disposed at the concave position of the guide wire, the internal space of the seat back can be effectively utilized.

Next, according to a fifth aspect of the present invention, the actuator in each of the above-described inventions is a motor, and a wire harness routed to the motor is attached to the front side of the mat by an appropriate attachment means. It is characterized by that.
According to the present invention, the wire harness routed to the motor is also directly attached to the front side of the mat by the attaching means. Therefore, since a separate bracket is not provided for attachment, the number of parts for attachment of such parts is not increased.

  According to each invention of the present invention described above, it is possible to reduce the number of parts by attaching various parts arranged inside the seat back to the mat which is a part for countermeasures against internal collision.

The schematic diagram of the seat back of this embodiment is shown, (A) is a sectional side view, and (B) is a front view showing the arrangement relation of each component. It is the perspective view which looked at the frame composition of the seat back of this embodiment from the back where a mat is arranged. It is the same rear view. It is sectional drawing which shows the wire harness attachment state to a mat | matte.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the display which shows directions, such as up and down, right and left, and front and rear in this description, shows the direction seen from the seated person who seated on the seat.
A vehicle seat 10 (hereinafter sometimes simply referred to as “seat 10”) includes a seat cushion that serves as a seat for a seated person, a seat back 12 that serves as a backrest, and a headrest that supports the head. Composed. In the schematic diagram of FIG. 1, only the seat back 12 is illustrated. The automobile seats 10 are usually arranged in two or three rows in the front-rear position in the vehicle interior. The rear seats in the second and subsequent rows generate a so-called internal collision that abuts against the rear surface of the seat back of the front seat when a forward external force is applied as in a vehicle collision. Measures are taken so that sharp protrusions do not protrude from the rear surface of the seat back of the front seat so that no harm occurs during this internal collision. In the seat back 12 of the present embodiment shown in FIG. 1, a flat plate-shaped mat 20 made of resin is disposed at the rear portion thereof, and even if the rear seat person abuts due to an internal collision, the occurrence of harm is mitigated. Like to do.
The configuration of the seat back 12 in which the mat 20 is disposed at the rear position will be described with reference to the schematic diagram of FIG. The seat back 12 first has a seat frame 14 that forms a skeleton.
As shown in FIG. 1B, the seat frame 14 is formed by side frames 14a on both left and right sides, an upper frame 14b at an upper position, and a lower frame 14c at a lower position configured in a frame shape. Next, as shown in FIG. 1 (A), a seat pad 16 is disposed so as to surround the seat frame 14 and forms the outer shape of the seat back 12 by receiving the back of the seated person. Has been. Further, a guide wire 18 that directly or indirectly supports the seat pad 16 is disposed on the seat back 12. The guide wire 18 is formed of a linear spring member, and is arranged in two rows in the vertical direction (vertical direction) inside the side frames 14a and 14a as shown in FIG. Specifically, the two-row guide wires 18 are connected at the lower side and are formed of a single wire. The guide wire 18 is supported by the lower frame 14c at the lower support location 22 and supported by the upper frame 14b at the upper support location 24. The support points 22 and 24 support the lower lower arm 14c as a pivotally fixed support, but support the upper upper frame 14b so that the upper end of the guide wire 18 can move up and down. It is supported. The guide wire 18 disposed in the vertical direction is disposed in a concave shape in which a central portion is recessed inward in the width direction, and a motor 26 as an actuator described later is disposed.

As shown in FIG. 1A, the mat 20 is disposed at the rear portion of the seat back 12, and is attached and fixed to the guide wire 18 at support portions 28 and 30 at the upper and lower portions thereof. As shown well in FIG. 1B, the mounting positions of the upper support portions 28 and 28 and the lower support portions 30 and 30 are set to a vertical position from the position where the concave shape 18a of the guide wire 18 is formed. The support spans 28 and 30 are supported at positions where the support span range is widened. Thereby, the mat 20 is attached to the guide wire 18 in a stable state.
The rear surface 20a of the mat 20 is formed in a flat plate shape, and does not have a sharp rearward protruding shape. As shown in FIG. 1A, a seat cover 32 that covers the seat pad 16 is formed to extend on the surface of the rear surface 20 a of the mat 20, and is covered with the seat cover 32. The mat 20 is made of a resin and has a rigidity that does not deform with a normal external force. As a result, even if the rear seat person abuts against the front seat mat 20 covered by the seat cover 32 at the time of an internal collision, the rear surface 20a of the mat 20 that abuts is a flat plate shape and does not have a protruding shape. The occurrence of harm is mitigated. Note that the mat 20 is not limited to a pure flat plate shape, and may be a curved shape as a whole, or any shape that does not have a protruding shape on the rear surface 20a.

Incidentally, the seat back 12 is provided with various operation mechanisms. For example, a lumbar mechanism (not shown) that supports the lumbar spine appropriately according to the seated person is provided. When the lumbar mechanism is an electrical operation mechanism, a motor 26 is provided as an actuator for operating the lumbar mechanism, and the motor 26 is disposed inside the seat back 12. In the present embodiment, as shown in FIG. 1A, the motor 26 is disposed between the seat pad 16 and the mat 20, and the motor 26 is directly attached and fixed to the front surface 20b of the mat 20. . Therefore, the motor 26 is arranged so as not to protrude backward beyond the mat 20.
As for the arrangement relationship between the motor 26 and the guide wire 18, the motor 26 is arranged by effectively utilizing the spatial position where the central position of the guide wire 18 described above is the concave shape 18 a. Specifically, as shown in FIG. 1B, the motor 26 is disposed at the outer side position of the concave shape 18a of the guide wire 18 disposed on the left side.

  2 and 3 show the seat back 12 of the schematic diagram described with reference to FIG. 1 in a practical state. Each of these drawings shows a skeletal structure of the seat back 12 in which the illustration of the seat pad 16 is omitted, FIG. 2 is a perspective view seen from the rear, and FIG. 3 is a rear view. In these drawings, components corresponding to those described in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIGS. 2 and 3, a wire harness 34 for supplying electricity is routed to the motor 26 as an actuator. The wire harness 34 routed to the motor 26 is routed from the motor 26 to a battery (not shown) installed outside the seat 10, but is routed to the rear position in the seat back 12. Specifically, it is routed downward along the front surface 20b of the mat 20 and is routed into the intake hole 36 opened in the lower frame 14c immediately after the lower end of the mat 20 is removed. .
When the wire harness 34 is routed on the front surface 20 b of the mat 20, the wire harness 34 is attached to the attachment hole 40 formed in the mat 20 by the resin clamp 38. FIG. 4 shows the mounting structure as a sectional view. The attachment hole 40 is formed by providing a hole with a mountain shape on the front surface 20b side of the mat 20. The hole is not formed so as to protrude from the flat plate-shaped surface of the rear surface 20a of the mat 20, and is preferably formed in a flush state. A resin clamp 38 that binds the wire harness 34 is fitted into the mounting hole 40 and fixed. Thereby, the wire harness 34 is also attached to the front surface 20b of the mat 20, and does not become a protrusion behind the mat. Therefore, this wire harness 34 also does not become a projection that causes harm to the backseat during an internal collision. In addition, the resin clamp 38 in this embodiment is one form of the appropriate attachment means of the present invention.

According to the above-described embodiment, since there is no protrusion behind the rear surface of the mat 20 arranged at the rear position of the seat back 12, the rear seat person is harmed by the front seat back 12 due to the internal collision. That is alleviated.
Then, using the mat 20 which is a part for countermeasures against the internal collision, an actuator such as a motor 26 for operating various operation mechanisms arranged inside the seat back and a wire harness 34 for wiring thereof are directly provided. Since it is attached, the number of parts for attaching parts arranged inside the seat back can be reduced.

As mentioned above, although embodiment of this invention was described, this invention can be implemented with another various form.
For example, the mat 20 is made of resin in the above embodiment, but may be made of other materials. In short, the rear surface 20a only needs to be formed in a flat plate shape.
In addition, the actuator of the various operation mechanisms arranged in the seat back is the electric motor 26 in the above embodiment, but may be a hydraulic servo motor or the like.
Moreover, although the guide wire 18 is formed in the concave shape 18a at the center position in the above embodiment, it may be formed in a linear shape.

10 seats (vehicle seats)
12 seat back 14 seat frame 14a side frame 14b upper frame 14c lower frame 16 seat pad 18 guide wire 18a concave shape 20 mat 20a rear surface 20b front surface 26 motor (actuator)
32 Seat cover 34 Wire harness 36 Take-in hole 38 Resin clamp 40 Mounting hole

Claims (5)

A seat frame that forms a skeleton of the seat back, a guide wire that is placed over the seat frame to support a seat pad that receives the back surface of the seated person, and an actuator that operates an operating mechanism included in the seat; Vehicle seat with a seat back,
A vehicle seat, wherein a mat is disposed at a rear position of the guide wire, and the actuator is disposed between a front surface of the mat and a seat pad and is directly attached to the mat. . The vehicle seat according to claim 1,
The vehicle seat according to claim 1, wherein the mat is formed into a flat plate shape having at least a rear surface without a protrusion. The vehicle seat according to claim 1 or 2,
The vehicle seat according to claim 1, wherein the mat is made of resin and has rigidity. The vehicle seat according to any one of claims 1 to 3,
The guide wire is disposed in the vertical direction with respect to the seat frame, and is formed in a concave shape inward in the width direction of the seat, and the actuator is disposed at the concave shape position. A vehicle seat characterized by being provided. The vehicle seat according to any one of claims 1 to 4,
The vehicle seat according to claim 1, wherein the actuator is a motor, and a wire harness routed to the motor is attached to the front side of the mat by appropriate attaching means.

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