JP5776504B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a block member on a side portion of a seat cushion that absorbs an impact at the time of a side collision.

  In a conventional general vehicle seat, a resin block member may be provided on the side of the seat cushion in order to absorb the impact exerted from the side at the time of a side collision. Patent Document 1 discloses a configuration in which a resin spacer having a honeycomb structure is provided on a side surface of a rear end portion of a seat cushion frame.

JP 2011-25827 A

  When the vehicle seat is equipped with an electric reclining device or slide device, a wire harness for supplying power to these devices and transmitting control signals to these devices is arranged on the side of the seat cushion. ing. When the shock absorbing block member as described above is provided on the side of the seat, the wire harness cannot be routed in the space occupied by the block member, and the freedom of routing is limited. Further, in order to route the wire harness while avoiding the block member, the harness is placed at a position other than the location where the block member 150 is provided on the side shield 140 covering the side surface outside the seat of the block member 150 as shown in FIG. Fixing members 170a to 170d were provided, and the wire harness 160 was fixed. However, in this case, depending on the routing route of the wire harness 160, interference between a cushion frame (not shown) existing inside the side shield 140 and the wire harness 160 fixed to the side shield 140 is unavoidable. There is. With the diversification of the electrical system in the seat, a wire harness fixing method that can accommodate various wire harness routing routes is required.

  The problem to be solved by the present invention is to provide a vehicle seat that can provide a high degree of freedom with respect to the wiring harness arrangement even when a block member that absorbs an impact at the time of a side collision exists on the side of the seat cushion. It is in.

  In order to solve the above-described problems, the vehicle seat according to the present invention is provided with a resin block member that absorbs a shock at the time of a side collision at a side portion of the seat cushion, and the block member can absorb the shock. The gist is that a harness fixing portion capable of fixing a wire harness for supplying power and / or transmitting a control signal is provided on a side surface orthogonal to the surface.

  Here, the block member is a columnar body in which a plurality of through holes are formed in the column axis direction, and the column axis is arranged in parallel to the sheet width direction, and is longer in the column axis direction than the outer diameter of the wire harness. A configuration in which shock absorption is possible at the end surface of the columnar body and the harness fixing portion is provided on the side surface of the columnar body is preferable.

  Further, the harness fixing portion is formed by forming a through hole in a thin plate-like attachment member extending in parallel with the shock absorbing surface of the block member, and the wire harness has a through hole formed in the through hole. It is conceivable that a clamp member having a fitting shape that can be fitted is provided, and the wire harness is fixed to the block member by inserting and fitting the clamp member into the through hole.

  Alternatively, the harness fixing portion fixes a wire harness by providing a mooring member having a hook shape outside the shock-absorbing surface of the block member, and mooring a midway portion of the wire harness to the mooring member. It may be of a structure.

  Furthermore, it is preferable that the vehicle seat further includes a side shield that conceals the block member, and the block member is integrally attached and fixed to the inner surface of the side shield.

  According to the vehicle seat according to the invention, since the wire harness can be routed and fixed in the space occupied by the block member in the side portion of the seat, the degree of freedom of wiring of the wire harness is improved. In addition, since it is not necessary to fix the wire harness to the side shield that covers the outside of the block member at least in the vicinity of the block member, interference between the wire harness and the seat cushion can be avoided.

  Furthermore, when the block member has a structure in which a plurality of through holes are formed in the column axis direction, it is possible to effectively absorb an impact at the time of a side collision while reducing the weight of the entire sheet. In addition, if the wire harness is longer than the outer diameter of the wire harness in the column axis direction and a harness fixing part is provided on the side surface, the fixed wire harness fits within the thickness of the block member, ensuring interference with the seat cushion To be prevented. Further, it is possible to prevent the fixed wire harness from being crushed and damaged by an impact at the time of a side collision.

  Here, a through hole is formed in a thin plate-like attachment member in which the harness fixing portion extends from the block member, and a clamp member attached to the wire harness is inserted and fitted into this through hole. If so, the wire harness can be reliably fixed to the block member by a simple operation. Further, when the thin plate-like mounting member extends in parallel with the shock absorbing surface of the block member, it can be easily formed integrally with the block member when the block member is manufactured.

  On the other hand, if the harness fixing part is a mooring member having a hook shape, there is no need to provide a fixing member such as a clamp member on the harness side, the number of parts is reduced, and the wire harness can be attached to any part. Since it can be moored, the freedom degree of the wiring harness arrangement is further improved.

  Furthermore, the side shield is provided for the purpose of protecting the block member and the wire harness from contact with a seated person by concealing the block member, and improving the design of the seat. If it is fixed to the shield integrally, the routing and fixing of the wire harness can be completed on the side shield to which the block member is fixed, and then the side shield can be attached to the side portion of the seat cushion. Since wire harness routing work including fixing of the wire harness to the block member is easier than when the block member is fixed to the seat cushion side, the productivity of the seat is excellent.

1 is a schematic side view of a vehicle seat according to a first embodiment of the present invention. It is a perspective view inside the side shield of the vehicle seat concerning the said embodiment. It is a disassembled perspective view of the block member vicinity of FIG. It is a disassembled perspective view of the block member vicinity concerning 2nd embodiment of this invention. It is a perspective view inside the side shield of the conventional general vehicle seat.

  Hereinafter, a vehicle seat according to a first embodiment of the present invention will be described in detail with reference to the drawings. A vehicle seat 1 shown in FIG. 1 includes a seat cushion 2 that is a seating portion and a seat back 3 that is a backrest portion. The seat cushion 2 has a cushion frame (not shown) as a skeleton.

  A side shield 4 made of resin is provided on the side of the seat cushion 2. Inside the side shield 4, a block member 5 for protecting the occupant and the seat 1 from an impact at the time of a side collision is provided on the rear side, and a wire harness 6 is routed. The wire harness 6 is used for power supply and control to a reclining device for tilting the seat back 3, a slide device for moving the seat cushion 2 back and forth, and the tip is connected to these devices. . The side shield 4 conceals the block member 5, the wire harness 6, and various devices to protect them from contact with a seated person and the like, and at the same time, enhances the design of the seat.

  FIG. 2 shows a configuration inside the side shield 4. The block member 5 is formed of a resin material typified by polypropylene, and is configured as a so-called honeycomb-shaped columnar body having many through holes in the column axis direction, that is, the thickness direction. The block member 5 is fixed to the side shield 4 in a state where one of the end faces is in contact with the inner surface of the side shield 4. If the block member 5 has sufficient thickness and material strength, when the impact in the direction from the outside of the side shield 4 toward the seat cushion 2 is received due to a side collision, the impact can be absorbed. Thereby, the impact transmitted to the other components of the seat 1 and the seated person can be reduced. The reason why a large number of through-holes are provided in the thickness direction is to reduce the weight of the entire sheet while ensuring the strength against impact. Moreover, the thickness of the block member 5 is configured to be larger than the outer diameter of the wire harness 6 to be routed.

  The tip of the wire harness 6 is connected to various devices as described above. Further, the base end portion is connected to the power source unit and the control unit on the vehicle main body side. Clamp members 6a and 6b are provided in the middle of the wire harness 6, and are fixed to a harness fixing portion provided on a side surface of the block member 5 described later at these locations.

  Based on the exploded perspective view of FIG. 3, the structure of the harness fixing | fixed part for fixing the wire harness 6 to the block member 5 is demonstrated. In the vicinity of the center in the thickness direction of the side surface perpendicular to the shock absorbing surfaces 5c and 5d of the block member 5, the thin plate-like harness mounting members 5a and 5b extend in parallel to the shock absorbing surface. Harness attachment holes 5a 'and 5b' are formed through the harness attachment members 5a and 5b.

  On the other hand, clamp members 6a and 6b are attached to the wire harness 6 at locations corresponding to the positions of the harness attachment holes 5a 'and 5b' at the time of routing. The clamp members 6a and 6b project from the outer peripheral surface of the wire harness 6 in an arrowhead shape, and the projecting portion has a portion whose outer diameter is slightly larger than the diameter of the harness attachment holes 5a 'and 5b'. The clamp members 6a and 6b can be fitted into the harness attachment holes 5a 'and 5b' by being plastically deformed while being inserted into the harness attachment holes 5a 'and 5b', respectively. Thereby, the wire harness 6 is reliably fixed to the block member 5 in the position of the harness attachment members 5a and 5b. Moreover, since the thickness of the block member 5 is larger than the outer diameter of the wire harness, the fixed wire harness is accommodated in the thickness of the block member, and interference with the seat cushion 2 and the side shield 4 is avoided.

  Even if there is a side collision, the block member 5 absorbs the shock received by the shock absorbing surfaces 5c and 5d, so that the shock is not directly transmitted to the harness fixing portion on the side surface perpendicular to the shock absorbing surfaces 5c and 5d. The damage of the wire harness 6 is avoided. Even when the block member 5 is deformed so as to be crushed in the thickness direction, if the thickness of the block member 5 is sufficiently larger than the outer diameter of the wire harness 6, an impact is directly applied to the wire harness 6. In addition, it is prevented from being damaged.

  Conventionally, in a general vehicle seat, the block member is provided only for absorbing shock. On the other hand, by using the configuration as described above, the block member 5 is provided with a new application of fixing the wire harness 6 while giving a high degree of freedom in routing.

  The block member 5 is manufactured by molding a resin material with a molding die. The harness mounting portions 5a and 5b have a configuration in which the harness mounting portions 5a and 5b extend from the side surfaces of the block member 5 in parallel with the shock absorbing surfaces 5c and 5d. The attachment portions 5a and 5b can be easily formed integrally with the main body portion of the block member 5. Further, since the block member 5 is integrally attached and fixed to the inner surface of the side shield 4, the wiring of the wire harness 6 including the connection to each device and the fixing to the side surface of the block member 5 can be reduced. Since it is sufficient to attach the side shield 4 to the seat cushion 2 and connect only the base end portions 6c and 6d of the wire harness 6 after the seat 4 is completed without being attached to the seat cushion 2, the seat productivity is excellent. ing.

  The configuration of the harness fixing portion provided on the side surface of the block member is not limited to the form in which the clamp member attached to the wire harness is inserted and fitted into the harness attachment hole of the block member as in the first embodiment. In the second embodiment shown in FIG. 4, another type of fixing method is applied. The vehicle seat according to the second embodiment has the same configuration as the vehicle seat according to the first embodiment except for the configuration of the harness fixing portion on the side surface of the block member.

  On the side surfaces of the block member 25 perpendicular to the shock absorbing surfaces 25c and 25d, hook-shaped harness anchoring members 25a and 25b are formed. On the other hand, no fixing member is attached to the wire harness 26. When routing the wire harness 26, the corresponding part of the wire harness is hooked on the hook-shaped portions of the harness anchoring members 25a and 25b. Next, the wire harness can be fixed by plastically deforming the harness anchoring members 25a and 25b so as to hold the wire harness.

  Compared to the type in which the clamp member is inserted and fitted into the through-hole as in the first embodiment, the type according to the second embodiment in which the wire harness is fixed by the anchoring member is inferior in fixing reliability. Moreover, since it is necessary to form a hook shape, it is difficult to form a harness anchoring member integrally with a block member main body like the harness attachment part of 1st embodiment. On the other hand, when the harness mooring member is adopted, there is no need to provide a fixing member such as a clamp member on the wire harness side, the number of parts is reduced, and the wire harness is moored at an arbitrary position in the middle. Therefore, the degree of freedom of arrangement is further improved. In consideration of these points, it is only necessary to determine which form of the harness fixing portion to employ based on the routing route of the wire harness, the shape of the block member, and the like.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention. For example, in the above two embodiments, the harness fixing portions are formed at two locations below the block member, but the number and position of the harness fixing portions can be arbitrarily determined according to the shape of the block member and the routing route of the wire harness. Can be determined.

  Further, the block member is not limited to the honeycomb-shaped resin member as described above, and can absorb a shock at the time of a side collision, and a harness fixing member can be formed on a surface perpendicular to the side shock absorbing surface. As long as it is a thing, what has another structure is applicable similarly. Even if the block member having the harness fixing portion as described above is provided only in the outer shield that is the side shield on the outer side in the vehicle width direction, both the outer shield and the inner shield that is the side shield on the inner side in the vehicle width direction. It may be provided.

2 Seat back 4 Side shield 5 Block member 5a, 5b Harness attachment member 5a ', 5b' Harness attachment hole 5c, 5d Shock absorbing surface 6 Wire harness 6a, 6b Clamp member 25 Block member 25a, 25b Harness anchoring member 26 Wire harness

Claims (5)

A resin block member that absorbs a shock at the time of a side collision is provided on a side portion of the seat cushion. A harness fixing part that can fix the wire harness is provided ,
The thickness of the block member is sufficiently larger than the outer diameter of the wire harness to prevent direct impact on the wire harness when the block member is deformed to be crushed in the thickness direction. The vehicle seat , wherein the fixing portion is provided in the center of the side surface of the block member in the thickness direction .   The block member is a columnar body in which a plurality of through holes are formed in the column axis direction, and the column axis is arranged in parallel to the sheet width direction, and is longer in the column axis direction than the outer diameter of the wire harness. The vehicle seat according to claim 1, wherein shock absorption is possible at an end surface of the body, and the harness fixing portion is provided on a side surface of the columnar body.   The harness fixing portion has a through-hole formed in a thin plate-like attachment member extending in parallel with the shock-absorbable surface of the block member, and the wire harness is fitted into the through-hole. The vehicle seat according to claim 1, wherein a clamp member having a projecting shape is provided, and the wire harness can be fixed by inserting and fitting the clamp member into the through hole. .   The harness fixing part has a structure for fixing a wire harness by providing a mooring member having a hook shape outside the shock-absorbing surface of the block member, and mooring a middle part of the wire harness to the mooring member. The vehicle seat according to claim 1, wherein the vehicle seat is provided.   The vehicle seat according to any one of claims 1 to 4, further comprising a side shield for concealing the block member, wherein the block member is integrally attached and fixed to the inner surface of the side shield.

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