JP2005186642A - Seat for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control the turning speed of a turning link provided in a seat for a vehicle so as to be always a safety speed regardless of turning conditions of the turning link. <P>SOLUTION: The seat 10 for the vehicle comprises a spiral spring 60 which applies a turning force to a seat supporting tool 30 in the turning direction, and is arranged at a required position of the seat supporting tool 30 of the seat 10 for the vehicle having a turnable link mechanism, and a damper means 70 using the working fluid acting in the direction for controlling the turning of the seat supporting tool 30. In the state that the turning of the seat supporting tool 30 is allowed, the turning of the seat supporting tool 30 is controlled by the operation of both of the spiral spring 60 and the damper means 70. The turning speed of the seat supporting tool 30 is so controlled as to be lower than the required speed by controlling the flow of the working fluid. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat that energizes rotational force to rotate the seat from a seating position to a retracted position, and relates to a vehicle seat capable of controlling the rotation speed to a predetermined speed.

In recent years, with respect to the purpose of making the living environment in a car or the like more comfortable, with regard to the seat portion, a sliding mechanism and a seat (a seat cushion and a seat back that can be folded on the seat) in the front-rear direction are stored. By adopting a dynamic link mechanism (a tumble mechanism for flipping up or a parallel link mechanism for tilting) or the like, it has been attempted to use a limited living space more efficiently. The former slide mechanism is provided with a support that supports the seat cushion of the seat so as to be slidable in the front-rear direction, and the four corners are supported by the legs from below. Then, the seat is moved in the front-rear direction so as to change the relative position with respect to the support. Further, the latter rotation link mechanism rotates the seat upward from the seating position in the use state with the front or rear of the seat cushion as the rotation center, and forward (position where the seat is substantially upright) or rear. It is moved (rotated) to the retracted position by jumping up (rearward floor) or tilting downward.
Some of the rotation link mechanisms are provided with an urging member that urges the rotation power to the rotation link at a node portion serving as a rotation base. For example, in the case of a tumble mechanism that flips the seat forward, a flip-up (biasing) member such as a spiral spring is provided in the vicinity of the connection position with the front leg, and the rear leg is operated to fold the seat back. A locking mechanism is provided that can release the connection with the striker by interlocking with the striker. And, by the urging force of the flip-up member, the flip-up can be performed with the vicinity of the connecting position with the front leg as the center of rotation.
Further, in view of the case where the rotational speed is excessively accelerated by the above-described urging, for example, as disclosed in Patent Document 1 described later, there is a system in which the rotational speed is suppressed by a damper. In this disclosure, the rotation speed is reduced to some extent by providing a damper at the rotation center (rotation base) and internally absorbing the rotation kinetic energy when the seat is flipped up as deformation energy. ing.
JP 2002-321553 A

However, although the conventional technology described above has been designed to reduce the energized flip-up rotational speed itself to some extent, regarding the jump-up behavior, it has been gradually accelerated as before. . Therefore, it is difficult to control the rotation speed below a desired speed with respect to the rotation in various forms that can be taken by the vehicle seat. In general, in a situation where such a damper does not act, as is obvious from the geometric relationship between the center of rotation and the position of the center of gravity of the seat, when the seat is flipped up from the seating position toward the retracted position, The rotational speed gradually increases as the energized rotational force is increased stepwise. In other words, the conventional one has only reduced the speed to some extent by the damper even with respect to the gradually increasing rotational speed.
Further, in the case of the combination of the slide mechanism and the tumble mechanism described above, in addition to the effect of increasing the rotational speed associated with the above-described flip-up, the effect associated with the change in the center of gravity position due to the slide is also added. The power was increased over a wider range to increase the rotational speed. That is, when the seat is slid forward and its center of gravity is brought close to the center of rotation, the urging force to be urged is further increased and the flip-up rotation speed is increased. Further, when the sheet is slid in the rearward direction, the flip-up rotation speed becomes low. In other words, the flip-up rotation speed varies greatly depending on the position where the sheet is slid, and it is difficult to always control the rotation speed below a desired speed.
That is, it has been impossible to control the rotation speed to be equal to or lower than a predetermined speed in response to such a change in the rotation speed. Therefore, when the storage position is reached in a state where the rotational speed is increased, the seat stops with a hit, and the behavior becomes very squeezed. And such a behavior not only fully responds to the request to make the in-car living environment comfortable, but also leads to discomfort for the operator and passengers.

  The present invention has been devised to solve the above-described problems, and the problem to be solved by the present invention is to determine the rotational speed of the rotational link provided in the vehicle seat. The purpose is to always control the speed below a desired speed under any rotation condition.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
First, the first invention of the present invention is a rotation for energizing a rotational force in a rotational direction with respect to the rotational link at a predetermined position of the rotational link of the vehicle seat having a pivotable link mechanism. Dynamic biasing means and damper means using a fluid that acts in a direction to control the rotation of the rotary link, and when the rotary link is allowed to rotate, the rotary biasing means; A vehicular seat in which both of the damper means function and the rotation of the rotation link is controlled, and the damper means controls the flow of the fluid to control the rotation speed of the rotation link to a predetermined value. Control below the speed.

Here, the vehicle seat having a pivotable link mechanism includes, for example, a tumble mechanism for flipping up (rotating) the seat in a desired direction and storing it, and tilting (rotating) the seat A parallel link mechanism for storage). Depending on the installation position and the purpose of use, either the front, rear, left, or right side of the link mechanism can be released by releasing the lock mechanism that holds the link mechanism at the seating position in use. It is set as the structure which can be rotated to a direction. Further, the tumble mechanism is provided with a pivotable link mechanism on the sheet flip-up direction side, and a pivot provided at a desired position (for example, a node portion serving as a pivot center) of the pivot link. When the rotational force is urged by the urging means, the sheet is flipped up. In the parallel link mechanism, the parallel link is formed by the seat and a pair of opposed legs that rotatably support the seat, and the leg is tilted by the bias of the pivot biasing means provided in either of them. In this way, the sheet is sunk.
Next, the rotation speed of the rotation link is obtained by the magnitude of the rotational force urged by the rotation urging means, and the resistance force (such as the weight of the seat) acting on the rotation urging means. When is small, the rotational force is greatly urged and the rotational speed is increased. Therefore, when the seat is flipped up from the seating position toward the retracted position, the rotational speed in the vicinity of the initial position (sitting position) is relatively high due to the geometric relationship between the center of rotation and the center of gravity of the seat. It becomes a low state, and the rotation speed gradually increases as it approaches the storage position.

Further, as the rotation urging means for urging the rotational force in the rotation direction with respect to the rotation link, for example, an elastic body such as a known spiral spring or torsion spring is attached to the rotation center, and this restoring force is applied. It is possible to energize the power using the energization of. In addition, even if it is another thing, what is necessary is just to be able to energize a rotation link, and there is no limitation in particular about the structure.
Further, the damper means is configured to convert the input rotational energy as fluid energy of the fluid inside, and to output rotational energy that is attenuated as a result of the energy loss that occurs at this time. Is. Here, it is well known that the degree of energy loss varies depending on the change in flow velocity in addition to the dynamic viscosity of the fluid and the shape of the flow path.
In addition, the predetermined speed of the rotation link is a speed (desired speed) that is safe for the operator or passenger to see by controlling the rotation speed of the rotation link. It is. Specifically, by decelerating in the vicinity of the storage position where the rotation speed becomes high, it is possible to give gentle behavior without hitting at the time of locking.

  According to the first aspect of the present invention, the rotation urging means provided at a desired position of the vehicle seat having the rotatable link mechanism applies rotational force to the rotation link in the rotation direction. It is fast. Then, when the rotation of the rotation link is allowed, the rotation link receiving the bias increases the rotation angle and gradually increases the rotational force received to increase the rotation speed. To do. On the other hand, the rotational force energized by the rotation energizing means is input to the damper means using the fluid in accordance with the forced displacement of the rotation energizing means or the rotation link. The damper means attenuates and outputs the input turning power. Thereby, the rotation speed input to the damper means is controlled to be equal to or lower than a predetermined speed. That is, both the rotation urging means and the damper means function synergistically to control the rotation speed of the rotation link below a predetermined speed. Even when the rotational speed of the rotational link is gradually increased as the rotational angle increases, the rotational speed is controlled to be equal to or less than a predetermined speed because the fluid is effectively attenuated by the fluid action.

Next, according to a second aspect of the present invention, in the first aspect described above, the damper means includes an orifice channel and a valve member for controlling the flow of the fluid entering and exiting the orifice channel, The valve member is bent and deformed by a change in pressure of the fluid due to the rotation speed of the rotation link, and the flow of the fluid is controlled so that the rotation speed of the rotation link becomes a predetermined speed or less. is there.
Here, the orifice flow path is formed by narrowing the flow path of a fluid that flows with the rotational force input to the damper means.

  According to the second aspect of the present invention, when the rotation speed of the rotation link is increased as the rotation angle increases, the flow pressure of the fluid increases inside the damper means, and the valve member receives this action. Serves to control the orifice flow path of the fluid. That is, the rotation speed control by the damper means is performed more efficiently by the flow control of the orifice flow path by the bending deformation of the valve member in addition to the flow control by the orifice flow path. Therefore, it is effective to control the rotation speed of the higher rotation link to a predetermined speed or less.

Further, according to a third aspect of the present invention, in the first or second aspect described above, the vehicle seat link mechanism is a tumble mechanism that jumps from a seating position in a seat use state to a retracted position. A rotation biasing means and a damper means are provided at predetermined positions of the flip-up rotation link of the mechanism, and the seat cushion of the seat is placed on the flip-up rotation link in the longitudinal direction of the flip-up rotation link. It is placed so that it can move.
Here, when the seat cushion of the seat is moved in the longitudinal direction of the flip-up turning link, that is, when the position of the center of gravity of the seat is changed with respect to the position of the turning biasing means, the seat is attached to the flip-up turning link. The magnitude of the rotational force that is applied varies depending on the movement position. For example, when the sheet is moved in a direction away from the position of the rotation urging means, the load on the rotation urging means due to its own weight (resistance to the rotation direction) due to its geometrical positional relationship. Becomes big. In addition, when it is moved in the direction of approaching the rotation urging means, the load is small. That is, the load applied to the rotation urging means varies not only between the seating position and the storage position of the seat but also depending on the position of movement of the seat.

  According to the third aspect, when the seat cushion is moved in the longitudinal direction of the flip-up turning link, the position of the center of gravity of the seat with respect to the position of the turning biasing means changes. In other words, the rotational force to which the flip-up turning link is biased differs depending on the position of the seat cushion that is moved, and thereby the flip-up turning speed also changes. However, when the seat cushion moves, for example, when a strong turning force is energized to increase the flip-up rotation speed, the damper means controls the speed to be a predetermined speed or less.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the present invention, a vehicle seat having a rotatable link mechanism is obtained by a synergistic action of both the rotation urging means and the damper means provided at a predetermined position. The rotation speed can be controlled below a predetermined speed. Further, since the effect of deceleration in the vicinity of the storage position where the rotational speed is increased when energized can be expected, a gentle behavior without hitting is obtained when the storage position is locked.

  Next, according to the second invention of the present invention, the damper means for controlling the rotation speed can exhibit a high control capability with respect to a constant input (rotation power). Therefore, for example, even when a relatively light weight sheet is applied, the rotation speed can be controlled to be equal to or lower than a predetermined speed even under conditions where a high rotation speed is likely to occur. That is, the present invention can be applied universally to various mechanisms for the purpose of constant rotation speed control. Further, if the extent to which the valve member acts, the viscous resistance of the fluid, etc. are set in accordance with the use conditions, etc., higher speed control can be expected.

  Further, according to the third aspect of the present invention, even if the tumble mechanism that flips the seat from the seating position to the retracted position and the mechanism that can move the seat cushion are combined, the predetermined position is not limited regardless of the movement position. It can control so that it may become below this rotation speed.

Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 11 show an embodiment of a vehicle seat 10. 1 is an exploded perspective view of the right side main part of the vehicle seat 10, FIG. 2 is a front view of the left side main part of the vehicle seat 10, FIG. 3 is a cross-sectional view taken along the line AA in FIG. 5 is a front view of the damper means 70, FIG. 6 is a rear view of the damper means 70, FIG. 7 is a sectional view taken along the line CC in FIG. 6, and FIG. 8 is a sectional view taken along the line DD in FIG. 9 is a left side sectional view of the damper means 70, FIG. 10 is a front view of the plate 100, FIG. 11 is a side view of the plate 100, and FIGS. 12 and 13 are explanatory views showing a use state of the vehicle seat 10. FIG.
The vehicle seat 10 according to the present embodiment is configured to be capable of flipping up the seat 20 from the seating position in the used state to the retracted position by rotating the seat 20 in the forward direction (the arrow direction in FIGS. 12 and 13). (Link mechanism). A spiral spring 60 for energizing the rotational force and a damper means 70 for controlling the rotation are provided at the rotation center (predetermined position) when the seat 20 is flipped up by the tumble mechanism. It has been. Here, the spiral spring 60 corresponds to the rotation urging means.

Next, the configuration of each part of the vehicle seat 10 will be described in more detail.
As shown well in FIG. 1, the tumble mechanism of the vehicle seat 10 is connected to a seat support 30 on which the seat 20 is movably mounted in the longitudinal direction and is pivotally connected to the front side of the seat support 30. A pair of front legs 40 that support this is configured, and a pair of rear legs 50 are further connected to the rear side of the seat support 30 (mounting holes 32 and 51) to support it. More specifically, shaft holes 31 and 41 are formed in the seat support 30 and the front leg 40, respectively, and a rotation shaft portion 90 to be described later is communicated with the shaft holes 31 and 41 so that the seat support 30 and The front leg 40 is rotatably supported. That is, the rotation shaft portion 90 is a rotation base portion (rotation center) of the tumble mechanism, and the spiral spring 60 and the damper means 70 are further connected to the rotation shaft portion 90. Here, as shown in FIGS. 12 and 13, the seat 20 includes a seat cushion 21 and a seat back 22.
Next, the configuration of the sheet support 30 will be described. In addition to the configuration described above, the seat support 30 further includes a bracket 33 for attaching the damper means 70 to the seat support 30, and a fastening hole 34 for fastening the bracket 33 is formed. . More specifically, the bracket 33 is fastened to the seat support 30 by a fastening hole 33a for fastening the damper means 70 with bolts or the like 80, a shaft hole 33b for communicating the rotary shaft portion 90, and the bracket 33. For this purpose, a fastening hole 33c is formed. The mounting state of the damper means 70 and the seat support 30 will be described. The housing 71 of the damper means 70 is attached to the bracket 33 so as not to rotate relative to the bracket 33, and the bracket 33 is rotated relative to the seat support 30. Installed in a disabled state and fixed. That is, the housing 71 of the damper means 70 and the seat support 30 are integrated with each other via the bracket 33.
Next, as well shown in FIGS. 1 to 3, the spiral spring 60 is an elastic spring formed in a well-known spiral shape, and its outermost end 61 side is fixed to the seat support 30, The end 62 side is fixed to the rotation shaft 90. That is, the spiral spring 60 is held in a relatively non-rotatable state on the outermost end 61 side on the seat support 30 and on the innermost end 62 side on the rotary shaft 90, respectively.
Next, as is well shown in FIGS. 1 and 3, the rotating shaft portion 90 is attached to a holding portion 91 that holds the inner end 62 side of the spiral spring 60 and a plate 100 that is formed in a hexagonal cross section and is described later. A shaft pin 92 that can be inserted and a locking rod 93 for locking the shaft pin 92 are provided. Specifically, the locking rod 93 is integrally formed by being welded to the front leg 40 in a state where the shaft pin 92 is inserted into the shaft holes 41 and 33b, so that the rotation shaft portion 90 and the front leg 40 are integrated. The relative rotation is impossible. Therefore, the spiral spring 60 is configured to rotate integrally with the seat support 30 on the outer leading end 61 side, with the fixed inner leading end 62 side as the fixed base end. Further, the shaft pin 92 formed in a hexagonal cross section is inserted into and connected to the plate 100 and is in a relatively non-rotatable state.
Next, as is well shown in FIGS. 1, 3, 10, and 11, the plate 100 is a hexagon in which the inner center is penetrated in the axial direction and the shaft pin 92 of the rotary shaft 90 can be inserted and connected. A through hole 101 having a shape and an outer serration 102 that can be fitted and connected to a rotor 73 of a damper means 70 described later are formed.

Next, as well shown in FIGS. 1 and 5 to 9, the damper means 70 is formed with a fastening hole 71 a through which a bolt or the like 80 is inserted and fastened to the bracket 33 of the seat support 30. A housing 71, a rotor 73 disposed inside the housing 71 so as to be pivotable, a fluid 72 made of a silicone-based viscous material filled in the housing 71, and a rotation range of the rotor 73. In order to regulate, a regulation part 74 formed to project the inner wall 71b inward is provided. In addition, the rotor 73 is formed with an inner serration 73 a that can be fitted and connected to the outer serration 102 of the plate 100. Therefore, in a state where the plate 100 is fitted and connected to the rotor 73, the rotation shaft portion 90 welded to the front leg 40, the plate 100, and the rotor 73 are integrated to be in a relative non-rotatable state. . A small flow path 74 a through which the fluid 72 can flow is formed in each of the restriction portions 74 described above. Here, the small flow path 74a corresponds to the orifice flow path of the present invention. That is, when the fluid 72 enters and exits the small flow path 74a by the rotational pressure of the rotor 73, energy loss is caused by the viscous resistance at that time. Further, as is well known, when the rotational pressure (rotational speed) input to the rotor 73 increases, the amount of energy loss described above increases due to the action of the kinematic viscosity of the fluid 72. In other words, the higher the rotational pressure that is input, the higher the control effect.
Further, as well shown in FIGS. 6 to 8, a valve member 75 capable of opening and closing the small flow path 74 a is disposed in the vicinity of the entrance / exit of the small flow path 74 a of the restriction portion 74. Specifically, the valve member 75 is made of a general spring steel plate (SUS301) or the like, and causes the bending deformation by receiving the fluid pressure of the fluid 72 to adjust the opening of the small flow path 74a. Like to do. More specifically, the valve member 75 has the small flow path 74a in an open state in an initial state (an unloaded state in which the rotor 73 does not rotate). When the rotational pressure of the rotor 73 is received (the rotor 73 is rotated clockwise in FIG. 6), the valve member 75 bends and deforms in a direction to close the small flow path 74a, and a predetermined rotational pressure is obtained. When the above is reached (the rotor 73 is at a predetermined rotation speed or higher), the small flow path 74a is closed. Then, when the small flow path 74a is closed, the rotation of the rotor 73 is abruptly suppressed. However, since the valve member 75 is opened again, the rotor 73 is rotated. In this way, the opening degree of the flow path is adjusted by the valve member 75, and more effective rotation speed control is performed. That is, even when the input turning force is strong, the control is effectively performed by these configurations. The predetermined rotation speed is a speed (desired speed) at which the flip-up of the seat 20 becomes a behavior with a sense of security for an operator, an occupant, or the like by controlling the rotation speed of the rotor 73. That is.

  That is, in the above-described configuration, the seat support 30 is used as a turning link (bounce-up turning link) of the tumble mechanism, and the turning shaft portion 90 that connects the seat support 30 and the front leg 40 has a turning center ( Rotation base). The seat support 30 is energized by the spiral spring 60 so that the seat 20 and the seat support 30 rotate integrally.

  As described above, the vehicle seat 10 of the present embodiment is configured. Next, a method of using the vehicle seat 10 will be described with reference to FIGS. 12 and 13 based on an example in which the seat 20 is flipped up from the seating position in the usage state to the storage position. Note that the spiral spring 60 is wound and attached to such an extent that the restoring force can energize the rotational force that can raise the seat 20 to the retracted position. Further, the seat 20 is held at the seating position in the use state by the lock mechanism 52 of the rear leg 50, and this lock mechanism 52 is interlocked with the operation of folding the seat back 22 of the seat 20 toward the seat cushion 21. It is to be released. And the sheet | seat 20 is made into the state which can be moved to a longitudinal direction by the sheet | seat support tool 30, and is moved to the rearmost side in the initial state. That is, in this state, the seat support 30 (rotation link) is energized by the spiral spring 60 in the flip-up direction, but the rotation is restricted by the lock mechanism 52 described above.

First, as shown in FIG. 12, an operation of folding the seat back 22 toward the seat cushion 21 is performed. As a result, the lock mechanism 52 of the rear leg 50 is released, and the seat support 30 in a state in which the rotational force is urged starts to rotate (bounce up).
At this time, as the seat support 30 rotates, the housing 71 of the damper means 70 fastened to the seat support 30 and the rotor 73 integrally connected to the stationary front leg 40 Relative displacement occurs during this time, and the rotational force is input to the damper means 70 accordingly. That is, rotational force is input by the housing 71 rotating relative to the fixed rotor 73. In the damper means 70, the rotor 73 is relatively rotated by the input turning force, and the fluid 72 flows through the small flow path 74a, whereby the inputted turning force is attenuated and output. The That is, the rotation speed of the sheet support 30 is controlled to be equal to or lower than a predetermined speed via the rotor 73.
Thereafter, when the seat support 30 is rotated and the rotation angle (tumble angle) increases, the geometric relationship between the rotation base and the center of gravity of the seat 20 (the seat 20 and the seat support 30) This acts to further increase the rotational force urged by the seat support 30. On the other hand, the increased rotational power is effectively attenuated by being input to the damper means 70. That is, when a strong rotational force is input, the amount of energy loss of the fluid 72 increases in the damper means 70, and the flow control by the valve member 75 is performed synergistically to attenuate the rotational force. To do. Therefore, the rotation speed of the seat support 30 is particularly effectively controlled in the vicinity of the storage position where the urging force is most urged. As a result, the seat support 30 is gently stopped without being hit in the vicinity of the storage position.

Next, a usage example in which the sheet 20 is moved in the foremost direction in the longitudinal direction of the sheet support 30 and is flipped up from this position as illustrated in FIG. 13 will be described. By moving the seat 20 in the forward direction, the relative separation dimension between the center of gravity position and the rotation base portion becomes narrower. Therefore, as compared with the case described above (when the seat 20 is located on the rearmost side), the rotational force urged by the seat support 30 becomes stronger and acts to further increase the flip-up rotation speed. However, since the damper means 70 effectively attenuates according to the rotational force, the rotational speed of the seat support 30 is controlled to be a predetermined speed or less. Further, even when the rotational force is urged in the vicinity of the storage position, the valve member 75 of the damper means 70 closes the small flow path 74a, so that more effective control is performed.
In this way, the rotational speed of the sheet support 30 is controlled, and the sheet 20 is always flipped up below the desired speed.

As described above, the vehicle seat 10 according to the above-described embodiment becomes a turning link by the synergistic action of the spiral spring 60 and the damper means 70 connected to the turning shaft 90 serving as the turning base. Regardless of the magnitude of the rotational force urged by the seat support 30, the speed can always be controlled below the desired speed. That is, the damper means 70 acts so that the control works more effectively when the input turning force exceeds a certain magnitude. For example, a damper sheet having a relatively light weight or a strong turning force is applied. Even when a rotating power urging means capable of energizing power is applied, control can be performed so that the speed is always lower than a predetermined speed. In addition, since the vehicle is effectively decelerated in the vicinity of the storage position where the rotational speed is high, it is possible to achieve a gentle behavior without hitting.
Further, regarding the flip-up behavior of the seat 20, a so-called notch sensation can be obtained in which the region where the seat 20 is to be rotated up and the region where the rotation is to be stopped can be sensed. Therefore, a higher performance image can be given to an operator, a passenger, and the like.
In addition, for example, when the spring force is applied to the seat support 30 by the spiral spring 60 or the like used in the above embodiment, the rotational speed may vary depending on the mounting accuracy of each part of the vehicle seat 10. The jumping up behavior may not be smooth. However, since this speed difference can be absorbed by the damper means 70, a stable behavior can be obtained by a smooth jumping speed.
For example, by changing the shape or the like of the valve member 75 or the small flow path 74a of the damper means 70, it is possible to adjust the amount by which the rotational force is attenuated, the input conditions under which the control is effective, and the like. Therefore, more appropriate speed control can be expected if these are set appropriately according to the purpose of use and the place of use.
In addition, even if the tumble mechanism and the mechanism capable of moving the center of gravity of the seat 20 are combined as shown in the present embodiment, the rotation speed is always equal to or lower than a predetermined rotation speed regardless of the moved position. It can control to become.

Although the embodiment of the present invention has been described with respect to one example, the present invention can be implemented in various forms other than the above-described embodiment.
For example, in this embodiment, a description has been given of a tumble mechanism that rotates the seat 20 forward and flips it up to the retracted position. However, with respect to the seat flip-up direction, the rear of the seat cushion is the center of rotation. It can also be applied to a type that is rotated 180 degrees (stored on the rear floor). In addition, the present invention can also be applied to a type in which the seat is tilted to rotate from the seating position to the storage position. In other words, in contrast to a configuration including a well-known parallel link mechanism in which legs are connected so that the four corners of the seat are rotatable, a rotating biasing means such as a spiral spring and a damper are provided at any of the rotating bases. Means may be provided. In the case of such a configuration, the same rotation speed control can be performed by rotating the leg from the seating position in use to the retracted position where the seat is sunk.
In this embodiment, the urging force of the spiral spring 60 is applied when the seat 20 is flipped up. However, the urging force is applied so that the seat 20 is lowered to the seating position. The rotation speed at this time may be controlled by using a configuration. In this case, since the rotational force is urged at the storage position, it may be held at the storage position by a lock mechanism or the like. In addition, such a configuration can be applied to the one provided with the parallel link mechanism described above, and the same operation and effect can be obtained.
Furthermore, although the fluid 72 made of a silicone-based viscous material is shown, the material is not limited as long as it exhibits the action and effect for controlling the rotation speed as described above. That is, a material having a viscosity that can suitably control the rotation speed in accordance with the purpose of use and the place of use may be appropriately selected and used.
Further, although the spiral spring 60 is used as a means for energizing the flip-up power of the seat 20, the configuration or the like is not particularly limited as long as the same effect is obtained. Absent. For example, a torsion spring or a compression spring that applies a restoring force due to elasticity may be used.
Further, the arrangement for attaching the valve member 75 of the damper means 70 is not limited. For example, suitable control may be performed by increasing the number of valve members or changing the arrangement in accordance with a predetermined speed for controlling the rotational speed of the rotor 73. In addition, if the contact state between the valve member and the inlet / outlet of the small flow path is changed, the sheet flip-up behavior can be variously adjusted. For example, in addition to the small flow path closed by the valve member as shown in this embodiment, the control member operates smoothly by generating a minute flow even in the closed state depending on the shape of the valve member. You may make it do.

1 is an exploded perspective view of an essential part on the right side of a vehicle seat showing an embodiment of the present invention. It is a left side principal part enlarged view of the vehicle seat. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a front view of a damper means. It is a rear view of a damper means. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a left sectional view of a damper means. It is a front view of a plate. It is a side view of a plate. It is explanatory drawing which shows the use condition of the vehicle seat. It is explanatory drawing which shows the use condition of the vehicle seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle seat 20 Seat 21 Seat cushion 22 Seat back 30 Seat support (turning link, flip-up turning link)
31 Shaft hole 32 Mounting hole 33 Bracket 33a Fastening hole 33b Shaft hole 33c Fastening hole 34 Fastening hole 40 Front leg 41 Shaft hole 50 Rear leg 51 Mounting hole 52 Lock mechanism 60 Spiral spring (rotation biasing means)
61 Outer end 62 Inner end 70 Damper means 71 Housing 71a Fastening hole 71b Inner wall 72 Fluid 73 Rotor 73a Inner serration 74 Restriction site 74a Small channel (orifice channel)
75 Valve member 80 Bolt etc. 90 Rotating shaft portion 91 Holding portion 92 Shaft pin 93 Locking rod 100 Plate 101 Through hole 102 Outer serration

Claims (3)

A rotation urging means for urging rotational force in a rotation direction with respect to the rotation link at a predetermined position of the rotation link of the vehicle seat having a link mechanism capable of rotation; Damper means using a fluid that acts in a direction to control the rotation, and both the rotation urging means and the damper means function when the rotation of the rotation link is allowed. A vehicle seat in which the rotation of the rotation link is controlled,
The vehicle seat according to claim 1, wherein the damper means controls the rotation speed of the rotation link to a predetermined speed or less by controlling the flow of the fluid. The vehicle seat according to claim 1,
The damper means has an orifice channel and a valve member for controlling the flow of the fluid entering and exiting the orifice channel, and the valve member changes the pressure of the fluid according to the rotational speed of the rotational link. The vehicle seat is characterized in that the flow of the fluid is controlled so as to cause bending deformation by the rotation of the rotation link so that the rotation speed of the rotation link is equal to or lower than a predetermined speed. The vehicle seat according to any one of claims 1 and 2,
The vehicle seat link mechanism is a tumble mechanism that flips up from a seating position when the seat is in use to a retracted position, and the turning biasing means and the damper are placed at predetermined positions of the flip-up turning link of the tumble mechanism. And a seat cushion of the seat is placed on the flip-up turning link so as to be movable in the longitudinal direction of the flip-up turning link.

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