JP3568454B2 - Car seat mounting structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention includes a connection link having one end side rotatably connected to the seat cushion side and the other end side rotatably connected to the floor side, and connecting the seat cushion in a state where the seat cushion is in a use posture. The present invention relates to a seat mounting structure for an automobile in which a connection point between a link and a seat cushion is located on a rear side of a vehicle body from a connection point with a floor side.
[0002]
[Prior art]
In the above seat mounting structure, by operating the seat cushion, the connection link rotates with respect to both the seat cushion side and the floor side, and the seat cushion switches from the use posture to the retracted posture moved forward. In addition, the seat space can be used for other than seating, such as a loading space.
In this type of seat, when an operating force is applied in the direction to move the seat cushion to the front side by applying a brake, etc., the seat cushion jumps up from the use position with the connection point with the floor side of the connection link as the center of rotation. Need to be regulated. For this reason, conventionally, for example, there has been one configured as shown in FIGS. 8 and 9.
That is, when the link attaching member 10 provided to connect the connection link 5 to the seat cushion 4a is provided with the locking portion 10a formed by bulging a part of the attaching member 10, and the seat cushion 4a is in the use posture. The locking portion 10 a is located below the connecting link 5, and restricts relative rotation between the connecting link 5 and the link mounting member 10 by contact with the connecting link 5. Thus, even if the operation force is applied, the jumping up of the seat cushion 4a is restricted. When the seat cushion 4a is switched from the use position to the storage position or returned from the storage position to the use position, the connection link 5 and the link attachment member 10 relatively rotate with the movement of the seat cushion 4a, and the locking portion is engaged. 10a moves over the connecting link 5 from one of its two lateral sides to the other while elastically deforming by contact with the connecting link 5. Thereby, when the posture of the seat cushion 4a is switched, the switching for canceling the jump-up regulation so as to enable the movement of the seat cushion 4a or for applying the jump-up regulation to the seat cushion 4a in the use posture is performed. In some cases, the operation can be performed simply by moving the seat cushion 4a without any trouble.
[0003]
[Problems to be solved by the invention]
Conventionally, even if the strong operating force is applied by a sudden stop operation or the like, the seat cushion is prevented from jumping up with high precision. It was necessary to strengthen the hook between the section and the connecting link. As a result, when the posture of the seat cushion is switched, the operation resistance required to move over the connecting link of the locking portion becomes large, and the operation for switching the posture of the seat cushion becomes heavy.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a seat mounting structure for an automobile, in which a seat cushion can be lightly switched in position, while it is possible to accurately control a jump of a seat cushion in a use posture.
[0005]
[Means for Solving the Problems]
As described in the first aspect, when the seat cushion is in the use position, the rotation operation force in the direction in which the rear end side of the seat cushion descends around the connection point with the floor side of the connection link as the rotation center is a spring body. Is applied to the seat cushion, so that an operating force is applied in a direction to move the seat cushion in the use position to the front side, so that the connection link is pivoted about the connection point with the floor side as the rotation center. When the rotation is attempted, the rotation operation force applied to the seat cushion by the spring body becomes a resistance. When the strength of the rotation operation force by the spring body is appropriately set in consideration of the strength of the operation force applied to move the seat cushion to the front side, the operation force for moving the seat cushion to the front side is applied. In addition, even if the operating force is strong, the upward rotation of the connecting link is restricted, so that the seat cushion can be prevented from jumping up.
Since the spring body is attached to the seat cushion so as to rotate with respect to the floor together with the seat cushion, for example, the mounting structure is such that a deformation operation force acts on or releases the spring body as the seat cushion rotates. To prevent the need for a special switching effort for applying or releasing the rotation operation force to the seat cushion, and to reduce the operational resistance when the seat cushion is rotated. The rotation operation force can be applied to the seat cushion in the use posture by the spring body.
With this, by appropriately setting the strength of the rotation operation force provided by the spring body, it is possible to eliminate a special effort for canceling or operating the flip-up restriction when switching the posture of the seat cushion. When the seat cushion is brought into the use posture, the seat cushion is not used even when the operation force is applied, while preventing the operation resistance due to the jumping-up restriction when switching the posture of the seat cushion. Can be accurately regulated.
[0006]
According to a second aspect of the present invention, when the spring body is made of a spring wire attached to a seat cushion, and a part of the spring wire constitutes the connection link, the same wire is used as the spring body and the connection link. It can be obtained as a material, and the spring body and the connecting link can be assembled at once.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIGS. 1 and 2, a seat support device 2 is fixed above a floor 1 at the rear of the vehicle, and a seat cushion 4 a is provided on the left and right sides of a seat support 3 provided in the seat support device 2. A seat 4 including a seat back 4b is attached to form a rear seat device of an automobile.
[0008]
The lower ends of the seat backs 4b of the left and right seats 4 are attached to the rear end side support portion 3a of the seat support 3 so as to be rotatable around a lateral axis 4c of the vehicle body. Thus, each of the left and right seat backs 4b is rotated around the shaft center 4c, so that the seat back 4 is in a standing posture with respect to the seat support 3 as shown by a solid line in FIG. Then, as shown by solid lines in FIG.
[0009]
The rear surface of the front end of the seat cushion 4a of each of the left and right seats 4 is attached to the front end side support portion 3b of the round pipe member of the seat support 3 which is a lateral portion of the vehicle body by an attachment structure including a pair of left and right connection links 5. It is.
[0010]
As shown in FIG. 1 and FIG. 2, the seat structure is provided with a band plate fixed in a direction along the width direction of the seat cushion as shown in FIG. 7 on the back side of the front end of the seat cushion 4a. A pair of left and right floor-side mounting members 7 provided by welding a pair of left and right brackets to the front end-side support portion 3b of the seat support 3, and a left end of the seat-side mounting member 6; The left connecting link 5 attached across the left floor mounting member 7, the right connecting link 5 mounted across the right end of the seat mounting member 6 and the right floor mounting member 7, And a spring body 8 partially attached to the seat-side attachment member 6.
[0011]
As shown in FIG. 2 and the like, one end of each of the pair of left and right connecting links 5, 5 rotates around a shaft center 5 a in a direction along the seat lateral direction to a link attaching portion 6 a provided in the seat-side attaching member 6. The other end is connected to the floor-side mounting member 7 so as to be rotatable around an axis 5b in a direction along the seat lateral direction.
[0012]
By operating the left and right seat cushions 4a so as to rotate in the vehicle longitudinal direction with the front end side of the seat cushion 4a as a center of rotation, the left and right connection links 5 are moved around the shaft center 5b on the floor side. And at the same time with the seat side around the shaft core 5a, the use posture shown by the solid line in FIG. 1 and the storage posture shown by the two-dot chain line in FIG. 1 and the solid line in FIG. Switch.
That is, the shaft center 5a, which is the connection point of the connection link 5 on the seat cushion side, is located on the rear side of the vehicle body with respect to the shaft center 5b, which is the floor side connection point, and the front end side of the seat cushion 4a is the seat side mounting member. 6, the connecting link 5, and the floor-side mounting member 7, supported by the front end side support portion 3b of the seat support 3, and the rear end of the seat cushion 4a rests on the rear end side portion 3c of the seat support 3 for receiving and supporting. When it is in the state of being used, it becomes the use posture. At this time, the shaft center 5a on the seat cushion side of the connection link 5 is located at a slightly lower level than the shaft center 5b on the floor side. In addition, the rear end of the seat cushion 4a enters under the lower end of the seat back 4b in the use posture, and is caught by the seat back 4b so as not to float from this position. The axis 5a on the seat side of the connection link 5 is located on the front side of the vehicle body with respect to the axis 5b on the floor side, and the front end side of the seat cushion 4a is supported on the floor in front of the seat support device 2. When it is in the state, it will be in the storage posture.
[0013]
As shown in FIG. 5, FIG. 6, etc., the pair of left and right connecting links 5, 5 and the spring body 8 are made of one spring wire. That is, it is made of one spring wire bent so that both ends become the connecting link 5 and the middle part becomes the spring body 8. The spring body 8 includes a left floor-side connecting portion 8a serving also as a connecting link portion rotatably connected to the floor-side mounting member 7 of the left connecting link 5, and a floor-side mounting member 7 for the right connecting link 5. A right floor-side connecting portion 8a also serving as a connecting link portion rotatably connected to the seat, a seat-side connecting portion 8b formed in the center of the spring wire and extending in the transverse direction of the seat, and the seat-side connecting portion 8b And an S-shaped spring body 8c located between the floor-side connecting portions 8a. The seat-side connecting portion 8b of the spring body 8 is connected to the spring mounting portion 6b of the seat-side mounting member 6 so as to be rotatable around an axis 8d in a direction along the seat lateral direction.
[0014]
As a result, as shown in FIG. 4, when the mounting posture of the seat cushion 4a changes, both the seat-side mounting member 6 and the spring body 8 rotate about the shaft center 5b with respect to the floor together with the seat cushion 4a. The seat-side mounting member 6 rotates around the axis 5a with respect to the connecting link 5 while maintaining a constant turning radius R with respect to the floor. For this reason, as the seat cushion 4a rotates, the distance D between the seat-side connecting portion 8b and the floor-side connecting portion 8a of the spring body 8 changes as follows. That is, the spring interval D when the seat cushion 4a is located in the use side rotation range S1 from the use posture to the middle position between the use posture and the storage posture is determined by changing the seat cushion 4a from the intermediate posture to the storage posture. The distance D is smaller than the spring distance D at the time of being located in the storage-side rotation area S2 before reaching. In the storage side rotation area S2, even if the rotation position of the seat cushion 4a changes, the spring distance D does not change much and becomes substantially the same. In the use side rotation range S1, if the rotation position of the seat cushion 4a changes, the spring interval D changes relatively large, and the spring interval D decreases as the seat cushion 4a approaches the storage position. The spring interval D when the seat cushion 4a is located in the storage side rotation area S2 is the spring interval when the spring body 8 is in a free state, and the seat cushion 4a is located in the use side rotation area S1. When the spring body 8 is in a free state, the spring distance D is smaller than that when the spring body 8 is in a free state.
[0015]
Therefore, when the seat cushion 4a is located in the storage-side rotation area S2, the spring body 8 does not apply an elastic restoring force to the seat cushion 4a, but when the seat cushion 4a is in the use posture, the spring body 8c bends. It is in a compression elastic deformation state, and the spring body 8 applies an elastic restoring force to the seat cushion 4a. At this time, the seat cushion 4a is placed on the rear end side support portion 3c of the seat support 3 and is held by the seat back 4b so as to be held in the use posture. Is maintained. As shown in FIG. 4, when the seat cushion 4a is in the use position, the shaft core 8d, which is a connection point connected to the seat cushion side of the spring body 8, is a connection point connected to the floor side. Since it is located at a lower level than the shaft core 5b, a horizontal component F1 of the elastic restoring force F and a component F2 in a direction perpendicular to the horizontal component F1 act on the seat-side mounting member 6, The vertical component force F2 is a rotation operation force in the direction of rotating the rear end of the seat cushion 4a downward around the shaft center 5b, which is a connection point on the floor side of the connection link 5, at the connection end.
[0016]
For example, when a brake is applied, an operating force in a direction of moving the seat cushion 4a to the front side of the vehicle body is applied. The vertical component force F2 having an appropriate magnitude in consideration of the magnitude of the operating force is applied by the spring body 8. The strength of the spring body 8 and the level difference between the shaft cores 5b and 8d of the spring body 8 when the seat cushion 4a is in the use posture are set so as to be applied to the seat cushion 4a. That is, when an operation force in the direction of moving the seat cushion 4a to the front side of the vehicle body is applied, the connecting link 5 tends to rotate upward about the shaft center 5b on the floor side. The pivoting operation force becomes a resistance, so that the upward rotation of the connecting link 5 is restricted, and the front end side of the seat cushion 4a is set to be prevented from jumping up.
[0017]
That is, in each of the left and right seats 4, the seat cushion 4a is switched between the use position and the storage position only by rotating the front side so that the front side becomes the center of rotation, and the seat cushion 4a and the seat back 4b are moved. By switching to the use posture, the seat 4 enters a seating state. At this time, even when an operating force in the direction of moving the seat cushion 4a to the front side of the vehicle body is applied by applying a brake or the like, the front end side of the seat cushion 4a can be used while being prevented from jumping up by the spring body 8 being restricted. By switching the seat back 4b and the seat cushion 4a to the storage position, the seat 4 is in the storage state, and the seating space above the seat support device 2 can be used for other than seating, such as a loading space.
[0018]
According to the above-mentioned spring body 8, when the seat cushion 4 a is switched to the storage side, the front end side of the seat cushion 4 a in the use posture is raised so as to rise around the axis 5 a of the connection link 5 on the seat cushion side. Then, the spring body 8 rises around the shaft 5b on the floor side while being compressed, and rises while being compressed until it reaches the level (dead point) of a straight line passing through both the shaft cores 5a and 5b of the connecting link 5, and then rises. When it rises above the linear level, it returns to its free state elastically. Then, the seat cushion 4a jumps up due to the elastic restoring force of the spring body 8, and the seat cushion 4a is easily lifted.
[0019]
【The invention's effect】
According to the first aspect of the present invention, even when a sudden brake is applied, the upward rotation of the connecting link is restricted, and the seat cushion is unlikely to jump up.
In addition, when the seat cushion is put into the storage position or returned to the use position, no special effort is required to release or operate the jumping restraint, and operation resistance due to the jumping restraint is less likely to occur. By simply performing the moving operation, the switching operation can be performed easily and lightly and easily.
[0020]
According to the second aspect of the present invention, the spring body and the connecting link can be obtained simply by using the same wire material and can be assembled at a stroke, and the one in which the seat cushion does not easily jump up can be obtained at a low cost from the structural surface and the mounting surface. .
[Brief description of the drawings]
FIG. 1 is a side view of a rear seat device of an automobile. FIG. 2 is a plan view of the rear seat device of the automobile in a partially cut-away state. FIG. 3 is a side view showing a stored state of a seat. FIG. 5 is a plan view of the connecting link and the spring body. FIG. 6 is a side view of the connecting link and the spring body. FIG. 7 is a perspective view of a seat-side mounting member. Side view of seat mounting structure [FIG. 9] Front view of conventional seat mounting structure [Description of symbols]
4a Seat cushion 5 Connecting link 5a Connecting point 5b of connecting link on seat cushion side Connecting point 8 of connecting link on floor side of spring 8 Spring body

Claims (2)

One end is rotatably connected to the seat cushion side and the other end is rotatably connected to the floor side, and the seat cushion of the connection link is provided in a state in which the seat cushion is in a use posture. The vehicle seat mounting structure in which the connection point with the side is located on the rear side of the vehicle body with respect to the connection point with the floor side,
A spring is attached to the seat cushion while rotating with respect to the floor together with the seat cushion, and in a state where the seat cushion is in the use posture, the rear end side of the seat cushion is connected to the floor of the connection link with the floor of the connection link. A seat mounting structure for an automobile, wherein a rotation operation force in a direction of descending as a rotation center is applied to a seat cushion by the spring body. The vehicle seat mounting structure according to claim 1, wherein the spring body comprises a spring wire attached to a seat cushion, and a part of the spring wire constitutes the connection link.

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