JPWO2010116415A1 - Car seat braking system - Google Patents

Abstract

Provided are a braking device for an in-vehicle seat for buffering the sliding movement of the in-vehicle seat and a slide seat using the braking device. A vehicle-mounted seat braking device (4) that attenuates movement of a seat (2) that is slidable with respect to a vehicle compartment floor (1) of a vehicle, and that rotates to one of the vehicle compartment floor and the seat A freely supported pulley device (5, 6), an endless belt (7) fixed to the other of the vehicle compartment floor and the seat, moved by sliding movement of the seat, and rotating the rotating member; And 5) a rotary damper (8) that is drivingly connected to the rotating shaft and attenuates the rotating operation of the rotating member. Further, the wires (130, 203) may be used instead of the belt, and the winding drums (111, 202) may be used instead of the pulley device. The braking device (200) is preferably provided on the slider (32).

Description

  The present invention relates to a vehicle-mounted seat braking device, and more particularly to a braking device that attenuates sliding movement of a vehicle-mounted seat slidably provided on a vehicle compartment floor and a vehicle-mounted seat including the vehicle-mounted seat braking device.

  The front seat of a sedan vehicle or one-box vehicle is provided so as to be slidable in the longitudinal direction of the vehicle body, and the occupant can arbitrarily adjust the seat position by manual operation. In general, the seat is locked (fixed) to the passenger compartment floor in a normal state, and when the passenger operates the manual operation lever, the seat and the passenger compartment floor are unlocked and the seat can be moved. Become. And after arrange | positioning a sheet | seat arbitrarily, a sheet | seat is locked again by a floor part by returning a manual operation lever.

With this type of seat, the seat and floor are unlocked while the seat position is being adjusted, so that when the vehicle suddenly starts or stops, the seat receives the inertial force and moves backward or forward. There is a risk of sudden movement. In addition, when the seat is biased toward the front of the vehicle body in order to facilitate adjustment of the seat position, the seat may suddenly move toward the front of the vehicle body at the moment when the lock is released by the manual operation lever. There is. In order to prevent such a rapid movement of the seat, there is a brake device provided with a piston damper between the seat and the passenger compartment floor (for example, Patent Document 1). In addition, a braking device consisting of a rack gear and a pinion gear is provided between the seat and the passenger compartment floor, and a friction force is applied to a disk formed integrally with the pinion gear to suppress rotation and prevent sudden movement of the seat. (For example, Patent Document 2).
Japanese Utility Model Publication No. 63-104238 JP-A-2-81739

  However, when a piston damper is used in the braking device, a long and large piston damper is required in order to ensure a seat moving distance. In addition, when using a braking device comprising a rack gear and a pinion gear, a long rack gear corresponding to the moving distance is required, and high-precision assembly is required to maintain the engagement between the rack gear and the pinion gear over the entire moving distance. Needed.

  The present invention has been made in view of the above background, and provides a vehicle seat braking device capable of buffering the sliding movement of the seat with a simple structure and a slide seat using the vehicle seat braking device. With the goal.

  In order to solve the above-mentioned problem, a first invention of the present invention is a braking device for an in-vehicle seat that attenuates movement of an in-vehicle seat (2) that is slidably provided on the vehicle compartment floor (1). 4) the rotating member (5) rotatably supported by one of the vehicle compartment floor and the vehicle seat, and fixed to the other of the vehicle compartment floor and the vehicle seat, and A transmission member (7) that is wound around the rotating member and rotates the rotating member in accordance with the movement of the in-vehicle seat, and a rotary damper that is coupled to the rotating shaft of the rotating member and attenuates the rotating operation of the rotating member ( And 8).

  According to a second aspect, in the first aspect, the rotary damper is a speed responsive rotary damper (220) that generates a damping force corresponding to a rotational speed of the rotating member. To do.

  According to a third aspect, in the first aspect, the rotary damper is connected to the rotating member via a one-way clutch (58).

  According to a fourth aspect, in the first aspect, the rotary damper is a rotary damper that exhibits a damping action only in one direction of rotation.

  In a fifth aspect based on the first aspect, the transmission member is an endless belt (7), and the rotating member is a pulley (5) around which the endless belt is wound.

  In a sixth aspect based on the first aspect, the transmission member is a wire (130), the rotating member is a winding drum (110) to which one end of the wire is fixed, and the wire is wound. It has an urging means (121) for urging the winding drum in the rotating direction.

  In a seventh aspect based on the first aspect, the rotating member is supported by the vehicle seat.

  The eighth invention is an in-vehicle seat provided with the in-vehicle seat braking device of the first invention, the slide rail (3) fixed to the vehicle compartment floor, and fixed to the in-vehicle seat, It has a slider (32) supported so as to be slidable on the slide rail, and urging means (9, 121, 205) for urging the vehicle seat to one side in the longitudinal direction of the slide rail. .

  In a ninth aspect based on the eighth aspect, the transmission means is a wire (203), one end of which is fixed to the slide rail, and most of the transmission means is housed inside the slide rail. The rotating member is a winding drum (202) supported by the vehicle seat and having one end of the wire fixed thereto.

  According to a tenth aspect, in the eighth aspect, the rotary damper is a speed response type rotary damper (220) that generates a damping force according to a rotational speed of the rotating member.

  According to an eleventh aspect, in the eighth aspect, the slide rail extends in at least one of a front-rear direction and a left-right direction of the vehicle seat.

  According to the first invention, the sliding movement of the in-vehicle seat is converted into the rotational motion by the rotating member via the transmission member, and the rotational motion is attenuated by the rotary damper. That is, since the rotation of the rotating member is attenuated by the rotary damper and the movement of the transmission member wound around the rotating member is suppressed, the on-vehicle seat connected to the transmission member is suppressed from abrupt movement. According to the second invention, the damping force can be changed according to the moving speed of the in-vehicle seat. According to the third aspect of the invention, since the rotating member receives the damping action from the rotary damper only in one rotational direction, the movement of the transmission member is buffered only in one direction, and the relative movement of the seat and the passenger compartment floor is attenuated only in one direction. Will come to be. For example, when the seat is slidable in the front-rear direction of the vehicle body, the buffering action can be generated only in the backward movement of the seat in the front-rear direction of the vehicle body. According to the fourth invention, the same effect as that of the third invention can be achieved without using a one-way clutch. According to 5th invention, a transmission member and a rotation member can be made into a simple structure. In addition, the use of a belt can reduce the weight and noise of the apparatus and eliminate the need for lubrication. According to the sixth aspect, even if a wire is used for the transmission member, the same effect as the fifth aspect can be obtained. According to the seventh aspect, there is no need to secure a space for providing the rotating member and the rotary damper on the passenger compartment floor. According to the eighth aspect of the present invention, when the vehicle suddenly starts, suddenly stops, or turns sharply when the seat position is adjusted, the seat can be prevented from moving suddenly, and the impact applied to the occupant can be reduced. Can do. According to the ninth aspect, there is no need to secure a space for providing the rotating member and the rotary damper on the passenger compartment floor. According to the tenth aspect, the damping force can be changed according to the moving speed of the in-vehicle seat. According to the eleventh aspect, an in-vehicle seat that slides back and forth or left and right, or front and rear and left and right can be configured.

It is a perspective view which disassembles and shows the slide type seat concerning a 1st embodiment. It is sectional drawing which shows the slide type seat which concerns on 1st Embodiment. It is a perspective view which decomposes | disassembles and shows the braking device of the slide type seat which concerns on 1st Embodiment. It is sectional drawing which decomposes | disassembles and shows the braking device of the slide-type seat which concerns on the modification of 1st Embodiment. It is a perspective view which shows the slide type seat which concerns on 2nd Embodiment. It is a perspective view which decomposes | disassembles and shows the braking device of the slide type seat which concerns on 2nd Embodiment. It is a perspective view which shows the slide type seat which concerns on the modification of 2nd Embodiment. It is a perspective view which decomposes | disassembles and shows the braking device of the slide type seat which concerns on the modification of 2nd Embodiment. It is a perspective view which shows the braking device of the slide type seat which concerns on the modification of 3rd Embodiment. It is a disassembled perspective view which shows the speed response type rotary damper which concerns on 3rd Embodiment. It is a perspective view which shows the principal part of the speed response type rotary damper which concerns on 3rd Embodiment. It is a cross-sectional view showing a speed response type rotary damper according to a third embodiment. It is a longitudinal section showing a speed response type rotary damper concerning a 3rd embodiment. It is a longitudinal section showing a speed response type rotary damper concerning a 3rd embodiment. It is a graph which shows the operating characteristic of the speed response type rotary damper which concerns on 3rd Embodiment. It is a perspective view which decomposes | disassembles and shows the slide-type sheet | seat which concerns on the modification of 3rd Embodiment.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The first embodiment is an example in which the vehicle seat braking device and the sliding seat according to the present invention are applied to a front seat of a vehicle.

  FIG. 1 is an exploded perspective view showing the sliding seat according to the first embodiment. FIG. 2 is a cross-sectional view showing the sliding seat according to the first embodiment. FIG. 3 is an exploded perspective view showing the sliding seat braking device according to the first embodiment. In the following description, front and rear in the longitudinal direction of the vehicle body are omitted, and front and rear, vertical upper and lower are omitted, and upper and lower are described.

  As shown in FIG. 1, the vehicle compartment floor 1 is located between two rail grooves 11 extending in the longitudinal direction of the vehicle body and between the two rail grooves 11, and also extends in the longitudinal direction of the vehicle body. A damper groove 12 is formed. In addition, a recess 13 that is connected to the rail groove 11 is provided at the front end of the two rail grooves 11. The recess 13 is used as a work space when a slide device 3 to be described later is attached, and in the second embodiment, a drum device that is a component of the braking device is arranged. The recess 13 may not be provided in the first embodiment.

  The two rail grooves 11 are provided with a slide device 3 that supports an in-vehicle seat 2 (hereinafter referred to as a seat 2) so as to be slidable in the longitudinal direction of the vehicle. The slide device 3 includes a rail 31 extending in the longitudinal direction of the vehicle body and a slider 32 supported so as to be slidable in the longitudinal direction of the vehicle body with respect to the rail 31. The rail 31 is fixed to the bottom of the rail groove 11. The slider 32 is supported by the rail 31 via a ball, for example. The slider 32 is connected to a seat support leg 33 provided on a side portion of the bottom of the seat 2. In this way, the seat 2 is fixed to the passenger compartment floor 1 through the two slide devices 3 so as to be slidable in the longitudinal direction of the vehicle body. The front-rear direction of the seat 2 and the front-rear direction of the vehicle body are the same.

  As shown in FIGS. 1 and 2, the damper groove 12 is provided with a braking device 4 that cushions the sliding movement of the seat 2. The braking device 4 is bridged between two pulley devices 5 and 6 as rotating members rotatably supported at the bottom of the damper groove 12 and the two pulley devices 5 and 6 and is partially fixed to the seat 2. The endless belt 7 and the rotary damper 8 provided coaxially with the rotation shaft of one pulley device 5 are included as main components.

  As shown in FIG. 3, the two pulley devices 5, 6 are provided at the front end portion and the rear end portion of the damper groove 12, and the front pulley device 5 is provided at the front end portion, and the rear end portion The rear pulley device 6 is provided on the rear side. The front pulley device 5 includes a pulley 51 that supports the endless belt 7, a rotating shaft 52 that is fixed to the pulley 51 as a rotating shaft of the pulley 51, and extends in the radial direction of the rotating shaft 52 to rotate the rotating shaft 52. The upper plate 53 and the lower plate 54 are supported freely, and the column 55 is used to fix the upper plate 53 and the lower plate 54 with a predetermined gap. Further, the rotating shaft 52 may be supported by the upper plate 53 and the lower plate 54 via the bearing 56.

  Similar to the front pulley device 5, the rear pulley device 6 includes a pulley 61 that supports the endless belt 7, a rotating shaft 62 that is fixed to the pulley 61 as a rotating shaft of the pulley 61, and a radial direction of the rotating shaft 62. And an upper plate 63 and a lower plate 64 that rotatably support the rotary shaft 62, and a column 65 that fixes the upper plate 63 and the lower plate 64 with a predetermined gap. Further, the rotating shaft may be supported by the upper plate 63 and the lower plate 64 via the bearing 66.

  The front and rear pulley devices 5 and 6 are provided such that the lower plates 54 and 64 are in contact with the bottom surface of the damper groove 12. Therefore, the rotation axes of the pulleys 51 and 61 are parallel to each other and are perpendicular to the bottom surface of the damper groove 12.

  The endless belt 7 spanned between the pulleys 51 and 61 is an annular belt having flexibility. The endless belt 7 may be a flat belt or a V-belt, but is preferably a toothed belt (cogged belt) having teeth on the surface in contact with the pulleys 51 and 61. In this case, a tooth profile (unevenness) that matches the teeth of the endless belt 7 is formed on the surface of the pulleys 51 and 61 that contacts the endless belt 7.

  As shown in FIG. 2, the endless belt 7 is fixed to the bottom of the seat 2 by a belt fixing member 21. The belt fixing member 21 is, for example, a member obtained by bending a flat plate into an L shape, and is fixed to a part of the endless belt 7 at one end and fixed to the bottom of the seat at the other end. The endless belt 7 and the belt fixing member 21 may be fixed, for example, by holding the endless belt 7 between a flat plate and screwing the flat plate to the belt fixing member 21 with bolts and nuts. . By forming in this way, when the seat 2 slides in the longitudinal direction of the vehicle body, the portion of the endless belt 7 fixed to one end of the belt fixing member 21 moves in conjunction with the movement of the seat 2, and the endless belt 7 is driven to rotate 51/61 pulleys. And the rotating shaft 52 fixed to the pulley 51 rotates.

  The rotary damper 8 may be a known bidirectional rotary damper. The rotary damper 8 includes, for example, a cylindrical main body case 81 and a rotor rotation shaft (not shown) that is coaxial with the cylindrical axis and protrudes from the main body case 81. The rotor rotation shaft is rotatably supported by the main body case 81 and has a rotor (not shown) in a portion enclosed in the main body case. The inside of the main body case 81 is filled with oil such as silicon oil, for example. The rotary damper 8 applies a load to the rotor and brakes the rotation of the rotor rotation shaft by the viscous resistance of oil flowing through the gap between the main body case 81 and the rotor. The rotary damper 8 is fixed on the upper plate 53 so that the rotor rotating shaft is coaxial with the rotating shaft 52 of the front pulley device 5. The rotor rotation shaft and the rotation shaft 52 have shapes that engage with each other on the contact surface, and are fixed by being engaged with each other, and rotate in conjunction with each other.

  As shown in FIG. 2, an assist spring 9 is provided between the seat 2 and the passenger compartment floor 1. The assist spring 9 is a constant load spring, one end of which is fixed and wound around a bobbin 91 rotatably supported by an assist spring seat 22 that extends downward from the rear portion of the bottom of the seat 2. The end is fixed to the passenger compartment floor 1. Since the elastic force acts on the assist spring 9 in the direction wound around the coil, the seat 2 is always urged forward with respect to the passenger compartment floor 1. The assist spring 9 may be a mainspring.

  A lock mechanism (not shown) is provided between the seat 2 and the vehicle compartment floor 1 to fix the relative position of the seat 2 with respect to the vehicle compartment floor 1 in the vehicle longitudinal direction. The locking mechanism normally fixes the seat 2 to the passenger compartment floor 1 and moves the seat 2 only while the operation input lever (lock release lever, not shown) provided on the locking mechanism is being operated. It is movable with respect to the room floor 1.

  The effect of 1st Embodiment is demonstrated. With the configuration described above, the seat 2 can slide in the longitudinal direction of the vehicle body with respect to the passenger compartment floor 1 while operating the operation input lever of the lock mechanism. When the seat 2 is slid, the belt fixed to the seat 2 via the belt fixing member 21 moves in conjunction with the rotation of the pulley 51 and 61 to rotate the pulley 51 and 61. The shaft 52 is rotated. At this time, the rotating shaft 52 is connected to the rotor rotating shaft 82 of the rotary damper 8, and therefore receives a rotational load of the rotary damper 8, that is, a buffering action of the rotary damper 8. As a result, the pulley 51 fixed to the rotating shaft and the endless belt 7 linked to the pulley 51 are subjected to resistance against the force to rotate the endless belt 7 around the pulley 51, and the endless belt 7 The sheet 2 fixed via the belt fixing member 21 has a resistance to sliding movement. In other words, the seat 2 receives the buffering action of the rotary damper 8 via the rotary shaft 52, the pulley 51, and the belt fixing member 21, and the sliding movement is attenuated (buffered). By this action, for example, the inertia generated by the sudden slide movement of the seat 2 forward by the urging force of the assist spring 9 when the lock mechanism is released, or when the vehicle suddenly starts when the lock mechanism is released. A sudden slide movement of the seat 2 to the rear due to force can be attenuated, and an impact applied to the occupant can be reduced.

  In the present embodiment, a toothed belt is used for the endless belt 7 and the tooth shapes corresponding to the teeth of the endless belt 7 are formed on the pulleys 51 and 61. Therefore, slip occurs between the endless belt 7 and the pulleys 51 and 61. do not do. Therefore, even when a strong force such as an inertia force generated when the vehicle suddenly starts is applied to the seat 2, the slip between the endless belt 7 and the pulley 51 is prevented, and the cushioning action of the rotary damper 8 is reliably ensured. 2 can be told.

  In the first embodiment, the rotary damper 8 is provided only in the front pulley device 5, but instead, the rotary damper 8 may be provided only in the rear pulley device 6. Further, the rotary damper 8 may be provided in both the front pulley device 5 and the rear pulley device 6.

  The length of the endless belt 7 and the distance between the front and rear pulley devices 5 and 6 may be arbitrarily set according to the slide movement distance of the seat 2.

  Next, a partially modified example implemented by changing a part of the first embodiment will be described. FIG. 4 is an exploded cross-sectional view of a sliding seat braking device according to a modified example of the first embodiment. Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  The partially modified example of the first embodiment differs from the first embodiment only in the configuration of the front pulley device 5. As shown in FIG. 4, in a partially modified embodiment, the pulley 57 is provided on the rotating shaft 52 via a one-way clutch 58. The one-way clutch 58 may be a known one-way clutch, for example, a rotor type one-way clutch. The one-way clutch 58 has an outer cylinder 58a and an inner cylinder 58b, and a clutch mechanism (not shown) is provided between the outer cylinder 58a and the inner cylinder 58b. The outer cylinder 58 a of the one-way clutch 58 is fixed to the pulley 57, and the inner cylinder 58 b is fixed to the rotating shaft 52. The one-way clutch 58 transmits only the rotational force in one direction of the pulley 57 to the rotating shaft 52, and idles in response to the reverse rotation of the pulley 57, and does not transmit the rotating force to the rotating shaft 59. In a partially modified embodiment, when the seat 2 slides backward, the clutch of the one-way clutch 58 is engaged with the rotation direction in which the pulley 57 is rotated by the endless belt 7 and the rotary shaft 52 is rotated. Has been.

  The effect of the partial modification example of the first embodiment will be described. With such a configuration, the cushioning action of the rotary damper 8 can be applied to the seat 2 only for the backward sliding movement of the seat 2. Usually, the occupant holds his / her foot against the forward movement of the seat 2 to regulate and adjust the movement of the seat 2. Therefore, the cushioning action for the forward movement of the seat 2 is omitted, and the seat 2 is moved quickly, so that the adjustment work of the seat position becomes quick and easy, and the workability and comfort of the adjustment work are improved. Can do.

  In some modified embodiments, the one-way clutch 58 is used to exert the buffering action of the rotary damper 8 only in one direction of movement of the seat 2. However, the one-way clutch is not used and the rotary damper 8 is known. Even if a unidirectional rotary damper is used, the same effect can be obtained. In this case, as in the first embodiment, the pulley 51 and the rotating shaft 52 fixed to each other are used.

  Next, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment is an example in which the vehicle seat braking device and the sliding seat according to the present invention are applied to a front seat of a vehicle. FIG. 5 is a perspective view showing a slide type seat according to the second embodiment, in which the sheet is omitted. FIG. 6 is an exploded perspective view showing the sliding seat braking device according to the second embodiment. Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  The second embodiment is the same as the first embodiment in the configuration of the passenger compartment floor 1, the seat 2, and the slide device 3, and is different in the configuration of the braking device 100 and the connection structure between the braking device 100 and the seat 2.

  As shown in FIG. 5, the recess 13 is provided with a braking device 100 that cushions the sliding movement of the seat 2 in the longitudinal direction of the vehicle body. The braking device 100 includes a drum (winding drum) device 110 as a winding drum that is rotatably supported on the bottom of the recess 13 of the passenger compartment floor 1, one end fixed to the slider 32, and the other end to the drum device 110. And a rotary damper 8 provided coaxially with the rotating shaft of the drum device 110 as main components.

  As shown in FIG. 6, the drum device 110 includes a drum 111 on which one end of a wire 130 is fixed and the wire 130 is wound, two side plates 112 and 113 that rotatably support the drum 111, and two side plates. The main component includes a support plate 114 and a bottom plate 115 that support 112 and 113 at a predetermined distance, and a constant load spring 121 that biases the drum 111 in one rotational direction. A mainspring may be used instead of the constant load spring 121.

  The drum 111 is formed in a hollow cylindrical shape, and rotates about the axis of the cylinder as a rotation axis. A wire winding groove 116 and a spring winding groove 117 formed in the circumferential direction are formed on the cylindrical surface. One end of a wire 130 is fixed to the wire winding groove 116, and one end of a constant load spring 121 is fixed to the spring winding groove 117. The winding directions of the wire 130 and the constant load spring 121 around the drum 111 are opposite to each other. Thus, when the wire 130 is wound around the wire winding groove 116 of the drum 111, the constant load spring 121 is fed out from the wire winding groove 116 of the drum 111, and the wire 130 is pulled from the wire winding groove 116 of the drum 111. When fed out, the constant load spring 121 is wound around the wire winding groove 116 of the drum 111. A cylindrical bush 118 is inserted into the drum 111 and fixed to the drum 111.

  A drum support shaft 119 and a bobbin support shaft 120 are fixed to the side plate 112. The drum support shaft 119 is formed of a cylindrical shaft portion 119a and a flange portion 119b formed at one end thereof. The shaft portion 119a of the drum support shaft 119 passes through the hole 112a formed in the side plate 112, and the flange portion 119b of the drum support shaft 119 and the side plate 112 are fixed, whereby the drum support shaft 119 is perpendicular to the side plate. It is fixed to. Similarly, the bobbin support shaft 120 is formed of a cylindrical shaft portion 120a and a flange portion 120b formed at one end thereof, and the shaft portion 120a of the bobbin support shaft 120 passes through a hole 112b formed in the side plate 112. The bobbin support shaft 120 is fixed perpendicularly to the side plate by fixing the flange portion 120b of the bobbin support shaft 120 and the side plate 112. The support plate 114 is formed with a hole 114 a serving as a passage for the wire 130.

  A bush 118 fixed to the drum 111 is rotatably supported on the shaft portion 119a of the drum support shaft 119. The other end of the constant load spring 121 is fixed to the shaft portion 120a of the bobbin support shaft 120, and a bobbin 122 around which the constant load spring 121 is wound is rotatably supported. The position of the bobbin 122 on the shaft portion 120a of the bobbin support shaft 120 is regulated to a predetermined position by the spacer 123.

  The side plate 113 is fixed to the side plate 112 via the support plate 114 and the bottom plate 115, rotatably supports the tip end portion of the shaft portion 120a of the bobbin support shaft 120, and supports the bush 118 rotatably through the hole 113a. . The bush 118 protrudes outward of the side plate 113 through the hole 113 a of the side plate 113.

  With this configuration, the drum device 110 that can wind the wire 130 around the wire winding groove 116 of the drum 111 is configured. In the drum device 110, the drum 111 is biased in the rotational direction of winding the wire 130 by an elastic force that attempts to return to the state of being wound around the bobbin of the constant load spring 121.

  The drum device 110 is provided with a rotary damper 8 so that the rotating shaft of the drum 111 and the rotor rotating shaft of the rotary damper 8 are coaxial. The contact surface between the rotor rotation shaft and the tip of the bush 118 has a shape that engages with each other, and the rotor rotation shaft and the bush 118 are fixed by engaging with each other. The rotary damper 8 here is a unidirectional rotary damper, and is provided so as to give a rotational load, that is, a buffering action, to the rotation of the drum 111 in the direction in which the wire 130 is fed out.

  The effect of 2nd Embodiment is demonstrated. When the lock mechanism is released and the seat 2 slides backward, the slider 32 fixed to the seat 2 via the seat support leg 33 moves backward, so the wire fixed to the slider 32 130 is pulled backwards. Therefore, a rotational force is applied to the drum 111 around which the other end of the wire 130 is wound in the direction in which the wire 130 is sent out. Here, the drum 111 is fixed to the rotor rotation shaft of the rotary damper 8 via the bush 118 and receives a rotational load of the rotary damper 8, so that a buffering action is applied to the rotation of the drum 111. Therefore, the movement of the wire 130 and the slider 32 is also buffered by receiving a load, and the backward sliding movement of the seat 2 is buffered. As a result, the rapid rearward movement of the seat 2 due to the sudden start of the vehicle when the lock mechanism is released is buffered, and the impact applied to the occupant is mitigated.

  The constant load spring 121 urges the drum 111 in the direction of winding the wire 130 and prevents the wire 130 between the slider 32 and the drum 111 from sagging.

  In the second embodiment, a unidirectional rotary damper is used as the rotary damper 8. However, as in the case of a partial modification of the first embodiment, a bi-directional rotary damper is used, and the drum 111, the bush 118, A one-way clutch may be arranged between them so that only one-way rotation is transmitted to the rotor rotation shaft of the rotary damper. In the second embodiment, the braking device 100 is provided only on the left slide device 3 when the front of the seat 2 is the front. However, the braking device 100 may be the right slide device 3 or both the left and right slide devices 3. May be provided. Further, one end of the wire 130 may be fixed directly to the sheet 2 without being fixed to the slider 32 or to another member fixed to the sheet 2.

  Next, a partially modified example implemented by changing a part of the second embodiment will be described. FIG. 7 is a perspective view showing a slide type seat according to a modified example of the second embodiment, with the sheet 2 removed. FIG. 8 is an exploded perspective view showing a sliding seat braking device according to a modification of the second embodiment. Hereinafter, the same components as those of the second embodiment are denoted by the same reference numerals as those of the second embodiment, and description thereof is omitted.

  The partially modified example of the second embodiment is different from the second embodiment in the configuration of the drum device 110a and the arrangement position of the wire 130a. As shown in FIG. 8, in the partially modified embodiment, the drum 111a is formed with a first wire winding groove 116a and a second wire winding groove 116b. The wire 130a is arranged along the slide device 3 so that one end of the wire 130a is fixed to the first wire winding groove 116a and then proceeds to the rear side in the slide device 3, and then provided on the rear side of the slide device 3. It is arranged along the slide device 3 so as to change the direction to the front side via the pulley 140 and to move forward in the slide device 3, and the other end of the slide device 3 comes out from the front end portion of the slide device 3. It is fixed to the wire winding groove 116b. The wire 130a forms a ring shape through the drum 111a. The support plate 114 is formed with holes 114a and 114b that serve as passages for the wire 130a.

  The wire 130a is wound in advance by a predetermined amount in both the first and second wire winding grooves 116a and 116b or one of the wire winding grooves 116a and 116b, and the wire 130a is wound on the first wire winding groove 116a. The rotation direction wound around the second wire winding groove 116b is different from the rotation direction wound around the second wire winding groove 116b. Thus, when the drum 111a rotates in one direction, the wire 130a is wound in one wire winding groove, and the wire 130a is sent out in the other wire winding groove. The wire 130a is coupled to the slider 32 at a continuous linear part.

  The drum device 110a is provided with the rotary damper 8 as in the second embodiment. The rotary damper 8 here is a bidirectional rotary damper, and the rotor rotation shaft is the same as in the second embodiment. And the tip of the bush 118 are fixed.

  The effect of the partial modification example of 2nd Embodiment is demonstrated. With this configuration, it is possible to exhibit the buffering action of the rotary damper 8 only with respect to the forward and backward sliding movement of the seat 2. By fixing both ends of the wire 130a to the drum 111a, the wire 130a is pulled by the sheet 2 with respect to any forward or backward movement of the seat 2, and the drum 111a is driven with a rotational force in both rotational directions. This is because it comes to be. Since the rotary damper 8 can provide a buffering action against the rotation of the drum 111a in both directions, the movement of the wire 130a is buffered by receiving a load in both directions, and the sliding movement of the seat 2 is also buffered in both directions. Further, since the wire 130a is formed in an annular shape via the drum 111a, the slack associated with the movement of the seat 2 does not occur, so that the constant load spring can be omitted.

  Next, a third embodiment of the present invention will be described with reference to the drawings. In the third embodiment, an in-vehicle seat braking device is provided on the seat side and the in-vehicle seat braking device is integrated into one unit for the purpose of improving the assembly of the in-vehicle seat braking device and omitting the recess 13. It is. FIG. 9 is a perspective view showing a sliding seat braking device according to a modification of the third embodiment, with the seat omitted. Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  As shown in FIG. 9, the braking device 200 is provided on the slider 32. The braking device 200 includes a bracket 201 attached to the slider 32, a drum (rotating member) 202 rotatably supported by the bracket 201, one end fixed to the front end of the rail 31, and the other end to the drum 202. A fixed wire 203, a pulley 204 rotatably supported by the slider 32, a constant load spring 205 that biases the drum 202 in the rotation direction in which the wire 203 is wound, and a rotation axis of the drum 202 are provided coaxially. And a speed responsive rotary damper 220 as a main component.

  The bracket 201 includes a bottom plate 211 fixed to the upper portion of the slider 32 and two side walls 212 and 213 erected from both ends of the bottom plate 211, and has a U-shape opened upward. Both side walls 212 and 213 rotatably support the drum 202 therebetween. The side wall 212 pivotally supports the bobbin 214. One end of a constant load spring 205 is fixed to the bobbin 214, and the constant load spring 205 is wound around it. The other end of the constant load spring 205 is connected to the drum 202. A cover 221 of the speed response type rotary damper 220 is fixed to the side wall 213.

  The other end of the wire 203 wound around the drum 202 is guided downward from the drum 202 and is then wound around the circumference of the pulley 204 to change the direction forward, and the inside of the rail 31 moves forward. It extends.

  The constant load spring 205 tries to wind around the bobbin 214 by an elastic force, and the drum 202 is always urged in the direction in which the wire 203 is wound. As a result, the slider 32 and the seat 2 fixed to the slider 32 are always urged forward.

  Next, the configuration of the speed response type rotary damper 220 will be described. FIG. 10 is an exploded perspective view showing a speed response type rotary damper according to the third embodiment. As shown in FIG. 10, the speed response type rotary damper 220 includes a cover 221, a cap 222, a plate 223, an inner rotor 224, an outer rotor 225, a housing 226, and two pistons 227 and 228. . In the following description, the cover 221 side is above the speed response type rotary damper 220.

  The housing 226 has a bottomed cylindrical shape, and a columnar convex portion 231 protrudes inward at a position shifted from the axial center at the bottom. In addition, the upper end surface of the housing 226 is formed in a step where the inner peripheral portion 232A is lower than the outer peripheral portion 232B, and a pair of ribs 232C project from the outer peripheral portion 232B.

  The outer rotor 225 has a cylindrical shape and is accommodated in the housing 226 such that the outer peripheral surface is in sliding contact with the inner peripheral surface of the housing 226. On the inner peripheral surface of the outer rotor 225, a trochoidal tooth profile 234 composed of a plurality of teeth 234A (six in this embodiment) is formed.

  The inner rotor 224 includes a trochoid tooth profile 236 accommodated in the outer rotor 225, and a columnar shaft 237 projecting upward from the central axis of the trochoid tooth profile 236. The trochoid tooth profile 236 includes teeth 236A (five in this embodiment) that can mesh with the teeth 234A of the trochoid tooth profile 234. Further, a concave portion (not shown) into which the convex portion 231 of the housing 226 is fitted is formed in the central shaft portion on the lower surface of the trochoidal tooth profile portion 236. The inner rotor 224 is positioned with respect to the housing when the concave portion and the convex portion 231 are fitted, and rotates about the convex portion 231 as a central axis. When the inner rotor 224 rotates, the tooth portion 236A of the inner rotor 224 and the tooth portion 234A of the outer rotor 225 mesh with each other, and the outer rotor 225 rotates.

  The plate 223 contacts the outer peripheral portion 232B of the upper end surface of the housing 226 on the lower surface. On the lower surface of the plate 223, a convex portion 238A (see FIG. 13) that contacts the inner peripheral portion 232A of the upper end surface of the housing 226 is formed, and a concave portion 238B in which the convex portion 231 of the housing is fitted is formed. . The plate 223 is formed with an insertion hole 239 that coincides with the axis of the convex portion 231, and the shaft portion 237 of the inner rotor 224 is inserted into the insertion hole 239.

  FIG. 11 is a perspective view showing a main part of the speed response type rotary damper according to the third embodiment, and shows a plate 223. As shown in FIG. 11, a pair of substantially fan-shaped communication paths 240 and 241 are formed on the lower surface of the plate 223. Communication holes 243 and 244 communicating with the upper surface are formed at one end of the communication passages 240 and 241 facing each other. At the boundary between the communication holes 243 and 244 and the communication passages 240 and 241, reduced diameter portions 243 </ b> A and 244 </ b> A in which the communication holes 243 and 244 are reduced in diameter are formed. A groove 245 that connects the communication hole 243 and the communication hole 244 is formed on the upper surface of the plate 223. A positioning hole 247 is formed on the upper surface of the plate 223.

  As shown in FIG. 10, the cap 222 is disposed on the upper surface of the plate 223 in a state where the bottomed cylindrical pistons 227 and 228 and the coil springs 251 and 252 are accommodated in the communication holes 243 and 244. The pistons 227 and 228 have a plurality of through holes (orifices) 254 (see FIG. 13) at the bottom. The pistons 227 and 228 are urged downward by the coil springs 251 and 252 and are in contact with the reduced diameter portions 242A and 244A. The cap 222 is formed with a convex portion 256 that fits into the positioning hole 247 of the plate and a convex portion 257 that supports the coil springs 251 and 252.

  The cover 221 has a cylindrical shape, and has an upper end formed with a flange portion 258 projecting radially inward over the entire circumference and a pair of flange portions 259 projecting radially outward. The cover 221 is covered from above the cap 222, and the housing 226 is press-fitted and fixed inside the cover 221. A hole 260 is formed in the flange portion 259 and is fastened to the side wall 213 of the bracket 201 by a bolt or the like (not shown).

  Seals 261, 262, and 263 are disposed between the housing 226 and the plate 223, between the plate 223 and the cap 222, and between the shaft portion 237 of the inner rotor 224 and the plate 223 and the cap 222, respectively, and are liquid-tightly joined. . The gap between the members of the speed response type rotary damper 220 is filled with silicon oil.

  Next, the operation of the speed response type rotary damper 220 will be described. FIG. 12 is a cross-sectional view showing a speed response type rotary damper 220 according to the third embodiment. As shown in FIG. 12, liquid chambers 270 </ b> A and 270 </ b> B are formed between the inner rotor 224 and the outer rotor 225. When the inner rotor 224 rotates in the direction of arrow A in the figure, the silicon oil in the liquid chamber 270A is compressed, while the silicon oil in the liquid chamber 270B is expanded. Therefore, the silicon oil in the liquid chamber 270A passes through the communication path 240, the communication hole 243, the groove 245, the communication hole 244, and the communication path 241 in order, and flows into the liquid chamber 270B.

  13 and 14 are an XIII-XIII cross-sectional view and an XIV-XIV cross-sectional view of FIG. 12, and show operations of the pistons 227 and 228 with respect to changes in the rotational speed of the inner rotor 224. When the rotational speed of the inner rotor 224 is relatively low, the pressure in the liquid chamber 270A is low, and the silicon oil flowing from the liquid chamber 270A to the liquid chamber 270B does not push up the piston 227, as shown in FIG. Pass through.

  On the other hand, when the rotation speed of the inner rotor 224 becomes equal to or higher than a predetermined speed, the pressure in the liquid chamber 270A increases, and the silicon oil flowing from the liquid chamber 270A to the liquid chamber 270B moves the piston 227 as shown in FIG. The coil spring 251 is pushed up against the biasing force. Then, the flow path of silicon oil is blocked by the piston 227.

  FIG. 15 is a graph showing the operating characteristics of the speed response type rotary damper according to the third embodiment. As shown in FIG. 15, when the moving speed of the seat 2 that is proportional to the rotational speed of the inner rotor 224 increases, the repulsion of the speed-responsive rotary damper 220 reaches a predetermined threshold value (about 200 mm / s in the present embodiment). The load increases according to the moving speed of the seat 2, but when the predetermined threshold value is exceeded, the piston 227 blocks the silicone oil flow path, so the repulsive load increases rapidly.

  When the rotation direction of the inner rotor 224 is opposite to the arrow A, the piston 228 similarly blocks the silicone oil flow path according to the pressure in the liquid chamber 270B.

  The effect of 3rd Embodiment is demonstrated. In 3rd Embodiment, since the braking device 200 was attached to the slider 32, the braking device 200, the slider 32, and the rail 31 can be comprised as one unit. Therefore, the assembling property to the vehicle compartment floor 1 is good. Moreover, since it is not necessary to form the recessed part 13 for providing a braking device in the compartment floor part 1, formation of a compartment floor part becomes easy.

  Further, by using the speed response type rotary damper 220, it is possible to prevent the damping force from being generated when the moving speed of the seat 2 is slow, such as when the seat position is adjusted, while the vehicle is suddenly adjusted when the seat position is adjusted. A large damping force can be generated when the moving speed of the seat exceeds a predetermined value due to a start or the like.

  Next, a modified example in which the third embodiment of the present invention is partially modified will be described. FIG. 16 is an exploded perspective view showing a sliding seat according to a modified example of the third embodiment. The first rail 301 and the second rail 302 used in the modified example of the third embodiment are the same as the rail 31 of the third embodiment, and the first slider 303 and the second slider 304 are the slider 32 of the third embodiment. The first braking device 305 and the second braking device 306 are the same as the braking device 200 of the third embodiment.

  As shown in FIG. 16, two first rails 301 are attached to the passenger compartment floor 1 so as to extend in parallel and in the front-rear direction of the vehicle body. The first rail 301 is attached to the passenger compartment floor 1 by bolt fastening, welding, or the like. A first slider 303 is attached to each of the first rails 301 so as to be slidable along the first rail 301, and a braking device 305 is attached to each of the first sliders 303.

  Two second rails 302 extending in the left-right direction (vehicle width direction) are spanned across the upper portions of the left and right first sliders 303 so as to be parallel to each other. The first slider 303 and the second rail 302 are connected by bolt fastening, welding, or the like. A second slider 304 is attached to each of the second rails 302 so as to be slidable along the second rail 302, and a braking device 306 is attached to each of the second sliders 304. Each of the second sliders 304 is connected to a seat support leg 307 provided at the bottom of the seat 2.

  By configuring as in the modified example of the third embodiment described above, the seat 2 can move in any direction, front, rear, left, and right with respect to the vehicle body floor portion 1. In addition, since the braking devices 305 and 306 generate a damping action, a sudden movement of the seat 2 is prevented.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. The shapes of the pulley device and the drum device are exemplary, and can be changed as appropriate without departing from the spirit of the present invention. In the third embodiment, by removing either one of the pistons 227 and 228, depending on the rotation direction of the inner rotor, the repulsive load does not increase suddenly even when the rotation speed of the inner rotor exceeds a predetermined value. Can do. In the embodiment described above, the rail is extended in the front-rear direction of the vehicle, but may be extended in the width direction of the vehicle.

DESCRIPTION OF SYMBOLS 1 Car floor part 2 Car seat 3 Slide rail 4, 100,200 Braking device 5,6 Pulley device 7 Endless belt 8 Rotary damper 9 Assist spring 11 Rail groove 12 Damper groove 13 Concave part 31 Lower rail 32 Upper rail 51, 57, 61 Pulley 52, 62 Rotating shaft 110 / 110a Drum device 111 / 111a / 202 Drum 121/205 Constant load spring 116 / 116a / 116b Wire winding groove 117 Spring winding groove 118 Bush 130, 130a, 203 Wire 220 Speed response Type rotary damper

Claims (11)

A vehicle-mounted seat braking device that attenuates the movement of a vehicle-mounted seat that is slidably provided on a vehicle interior floor.
A rotating member rotatably supported by one of the vehicle compartment floor and the in-vehicle seat;
A transmission member that is fixed to the other of the vehicle compartment floor and the vehicle seat and is wound around the rotation member, and rotates the rotation member as the vehicle seat moves.
An in-vehicle seat braking device comprising: a rotary damper coupled to a rotating shaft of the rotating member and dampening a rotating operation of the rotating member.   The on-vehicle seat braking device according to claim 1, wherein the rotary damper is a speed-responsive rotary damper that generates a damping force according to a rotation speed of the rotating member.   The on-vehicle seat braking device according to claim 1, wherein the rotary damper is coupled to the rotating member via a one-way clutch.   The on-vehicle seat braking device according to claim 1, wherein the rotary damper is a rotary damper that exhibits a damping action only in one direction of rotation. The transmission member is an endless belt,
The on-vehicle seat braking device according to claim 1, wherein the rotating member is a pulley around which the endless belt is wound. The transmission member is a wire;
The rotating member is a winding drum to which one end of the wire is fixed;
2. The in-vehicle seat braking device according to claim 1, further comprising: an urging unit that urges the winding drum in a rotation direction of winding the wire.   The on-vehicle seat braking device according to claim 1, wherein the rotating member is supported by the on-vehicle seat. An in-vehicle seat comprising the in-vehicle seat braking device according to claim 1,
A slide rail fixed to the passenger compartment floor,
A slider that is fixed to the vehicle seat and supported by the slide rail so as to be slidable,
A vehicle-mounted seat comprising biasing means for biasing the vehicle-mounted seat in one of the longitudinal directions of the slide rail. The transmission means is one end of which is fixed to the slide rail, and most of the wire is accommodated in the slide rail.
The in-vehicle seat according to claim 8, wherein the rotating member is a take-up drum supported by the in-vehicle seat and having one end of the wire fixed thereto.   The in-vehicle seat according to claim 8, wherein the rotary damper is a speed response type rotary damper that generates a damping force according to a rotation speed of the rotating member.   The in-vehicle seat according to claim 8, wherein the slide rail extends in at least one of a front-rear direction and a left-right direction of the in-vehicle seat.

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