JP2019131049A - Pelvis support device of vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a perbic support device for a vehicle seat that supports a passenger with a body pressure value appropriate for the person and reduces a feeling of fatigue due to compression of the waist. A Pelvic support device (10, 200) used for a vehicle seat (1) including a seat cushion (3) and a seat back (2) coupled to a rear end of the seat cushion. A seat back frame (11, 211) provided on the seat back, an upper support member (16) disposed on the seat back frame above an intermediate portion in the vertical direction of the seat back, A plate-like lower support member (19) pivotally supported with respect to the seat back frame via a pivot (23) extending left and right at an intermediate portion, and an angle around the pivot of the lower support member Provided is a Pelvic support device having a drive device (37, 237) for adjusting and a control device (36, 236) for controlling the drive device. . [Selection] Figure 1

Description

  The present disclosure relates to a Pelvic support device for a vehicle seat.

  Various types of Pelvic supports are known that support the Perbic (pelvis) of a crew member seated in a vehicle seat. For example, a vehicle seat that uses a pressure sensor and controls the shape of the seat with an air bag is known (Patent Documents 1 and 2). Also, a vehicle seat is known in which a resin panel is pushed forward and a pelvic part of a passenger seated on the seat is pressed (Patent Document 3). Further, a vehicular seat is known in which a warp plate member is pivoted by an air bellows and a passenger seated on the seat is pressed (Patent Document 4).

JP 2002-315657 A JP 2004-168224 A JP 2017-81361 A Japanese National Patent Publication No. 9-502363

  However, the Pelvic support device for a vehicle seat disclosed in Patent Documents 1 and 2 has a pressing means for locally applying pressure to a very narrow region of the seat back via a convex member. It was not good in terms of dispersion of body pressure. The Pelvic support device for a vehicle seat disclosed in Patent Documents 3 and 4 has a pressing means for applying a relatively wide pressure to the seat back via a flat plate member that takes into account the dispersion of body pressure. In addition, it was impossible to squeeze and press the target to the seat back portion corresponding to the lumbar spine.

  In the vehicle seat according to Patent Document 3, the seat back is pressed by the link rod through the flat resin panel. Even if the pressing is localized, the plate that presses the seat back portion corresponding to the pelvis and the plate that presses the seat back portion corresponding to the portion from the lumbar vertebra to the thoracic vertebra are the same plate (Patent Document 1). Resin plate member (reference numeral 32) shown in FIG. Therefore, the disclosed invention has a problem in pressing concentrated on the waist and pelvis.

  In addition, the vehicle seat according to Patent Document 4 presses the seat back through the warp plate with a link rod or an air bellow, but a plate that presses the seat back portion corresponding to the pelvis and a portion from the lumbar vertebra to the thoracic vertebra The plate that presses the seat back portion corresponding to is the same plate (plate member (reference numeral 20) drawn in FIG. 4 of Patent Document 4). Therefore, the disclosed invention has a problem in pressing concentrated on the waist and pelvis.

  In view of the above background, it is an object of the present invention to provide a perbic support device for a vehicle seat that supports a passenger with a body pressure value appropriate for the person and reduces a feeling of fatigue due to compression of the waist.

  In order to solve the above-described problems, an aspect of the present invention provides a perl used for a vehicle seat (1) including a seat cushion (3) and a seat back (2) coupled to a rear end of the seat cushion. Bic support device (10, 200), upper support supported by seat back frame (11) provided on seat back so as to be disposed above an intermediate portion in the vertical direction of seat back A plate-like lower support member (19) pivotally supported by the upper support member via a member (16), a pivot (23) extending left and right at a position corresponding to the intermediate portion, and the lower portion A drive device (37, 237) for adjusting the angle of the support member around the pivot axis, and a control device (36, 236) for controlling the drive device.

  According to this aspect, the plate-like lower support member is pushed forward by the drive device for adjusting the angle around the pivot axis of the plate-like lower support member and the control device for controlling the drive device, and the pelvis In addition, the waist can be intensively pressed. Alternatively, the plate-like lower support member can be pulled backward to suppress pressing of the pelvis and waist. It is possible to support the pelvis and the lumbar part according to the difference in the angle of the pelvis at the time of sitting depending on how the muscles around the individual pelvis and the lumbar part are attached or the hardness of the muscles. In this way, it can press with the body pressure distribution of the pelvis and the waist | lumbar part according to individual differences. Unlike the convex member, the plate-like lower support member has an expanse and is therefore suitable for the dispersion of body pressure.

  According to another aspect of the present invention, in the above configuration, the lower support member is provided at a site corresponding to the pelvis (30) and the lumbar spine (31) of the seated person.

  According to this aspect, the target can be squeezed and pressed more reliably to the pelvis and the lumbar region, and the pelvis and lumbar body pressure distribution according to individual differences can be pressed. It is possible to support the pelvis and the lumbar part according to the difference in the angle of the pelvis at the time of sitting depending on how the muscles around the individual pelvis and the lumbar part are attached or the hardness of the muscles.

  In another aspect of the present invention, in the above configuration, the control device includes a manual input device (8).

  According to this aspect, the passenger can sit on the seat and drive the drive device from the manual input device via the control device. In order to support the pelvis and lumbar according to the difference in the angle of the pelvis at the time of sitting due to how the muscles around the pelvis and lumbar vertebrae are attached or the hardness of the muscles, etc. Can be based on their own judgment.

  According to another aspect of the present invention, in the above configuration, the control device further includes a pressure sensor (32, 33) disposed in a portion corresponding to the lower support member of the seat back, and the control device includes the pressure sensor. The drive device is controlled based on the output.

  According to this aspect, for example, the lower support member can be varied based on the pressure sensor until the output of the pressure sensor reaches a predetermined pressure value, and control can be automated.

  According to another aspect of the present invention, in the above configuration, the pressure sensor includes a plurality of pressure sensors (32, 33) provided at portions corresponding to the pelvis and lumbar spine of the seated person.

  According to this aspect, it is possible to measure the pressures of the pelvis part and the waist part, and to control based on the plurality of sensor output values. For example, it is possible to improve the support to a higher quality by controlling the variable until both pressure differences are within a specified value.

  Another aspect of the present invention is a Pervik support device (100, 100) used in a vehicle seat (1) including a seat cushion (3) and a seat back (2) coupled to a rear end of the seat cushion. 300), a front support member (116) supported on a seat cushion frame provided on the seat cushion so as to be disposed in front of an intermediate portion in the front-rear direction of the seat cushion, and the intermediate A plate-like rear support member (119) pivotally supported by the front support member via a pivot extending left and right at a position corresponding to the portion, and an angle around the pivot (123) of the rear support member It has a drive device (37, 237) for adjusting, and a control device (36, 236) for controlling the drive device.

  According to this aspect, the plate-like rear support member is pushed up toward the pelvis and the lumbar region by the drive device for adjusting the angle around the pivot axis and the control device for controlling the drive device. And presses the pelvis from below. Alternatively, the plate-like rear support member can be pulled down due to the pelvis and the lumbar region, and the pressing can be suppressed. In this way, it is possible to press with the body pressure distribution around the sciatic bone and the tailbone according to individual differences. The pelvis can be supported according to the difference in the angle of the pelvis at the time of sitting depending on how the muscles around the individual sciatic bone and tailbone are attached or the hardness of the muscle. In this way, the body pressure distribution of the pelvis part and the lumbar part according to individual differences can be obtained, and the feeling of fatigue due to the compression of the lumbar part can be reduced. Unlike the convex member, the plate-like rear support member has an expanse and is also suitable in terms of dispersion of body pressure.

  According to another aspect of the present invention, in the above configuration, the rear support member is provided at a site corresponding to a seated person's sciatic bone (30a) and a coccytal bone (30b).

  According to this aspect, it becomes possible to squeeze and press the target to the pelvis more reliably and to press with the body pressure distribution around the sciatic bone and the tailbone according to individual differences. It is possible to support the pelvis and buttocks according to the difference in the angle of the pelvis at the time of sitting depending on how the muscles around the individual sciatic and coccyx are attached or the hardness of the muscles.

  In another aspect of the present invention, in the above configuration, the control device includes a manual input device (8).

  According to this aspect, the occupant can sit on the seat and drive the drive device from the manual input device via the control device according to his / her own ingenuity. The Pelvic support device can be instructed to support the pelvis and hips according to the difference in the angle of the pelvis when seated due to hardness or the like.

  According to another aspect of the present invention, in the above configuration, the control device further includes a pressure sensor (132, 133) disposed in a portion corresponding to the rear support member of the seat back. The drive device is controlled based on the output.

  According to this aspect, the rear support member can be varied by the pressure sensor until, for example, a predetermined pressure value is reached based on the output of the pressure sensor, and the control can be automated.

  According to another aspect of the present invention, in the above configuration, the pressure sensor includes a plurality of pressure sensors provided at sites corresponding to the sciatic bone and the coccyx bone of the seated person.

  According to this aspect, it is possible to measure the pressure at the site corresponding to the sciatic bone and the coccyx bone of the seated person and to control based on the plurality of sensor output values. For example, it is possible to provide high-quality support by the rear support member by controlling the variable until both pressure differences are within a specified value.

  According to the above configuration, it is possible to provide a perbic support device for a vehicle seat that supports a passenger with a body pressure value appropriate for the person and reduces a feeling of fatigue due to compression of the waist.

The perspective view seen from the front upper direction of the Perbic support device of a vehicle seat Front view of Pelvic support device provided on the seat back Side view of the Pelvic support device provided on the seat back Top view of the Pelvic support device provided on the seat cushion Side view of the Pelvic support device provided on the seat cushion Block diagram of screw drive and control device Schematic side view showing the correspondence of seat back to individual skeletal differences of seated persons Schematic side view showing the correspondence of seat cushions to individual skeletal differences of seated persons Schematic side view showing the pressing on the human skeleton of the seated person of the conventional lumbar support device Schematic side view showing the pressure on the human skeleton of the occupant of the Pervik support device Block diagram of a Pelvic support device according to another embodiment

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of Pelvic support devices 10 and 100 for a vehicle seat 1 according to the present invention will be described. In the following description, the front means the front viewed from the seated person seated on the vehicle seat 1. The rear refers to the rear as viewed from the seated person seated on the vehicle seat 1. The width direction refers to the width direction of the vehicle seat 1. Left and right refer to the left and right viewed from a seated person seated on the vehicle seat 1. With front and back, the open surface closer to the seated person seated on the vehicle seat 1 is referred to as the front, and the opposite surface is referred to as the back surface. “Upward” refers to the upper side as viewed from the seated person seated on the vehicle seat 1, and the same applies to the shape and arrangement of the members, and does not refer to the direction viewed from the flat state during reclining. The downward direction is the upward opposite direction.

  With reference to FIG. 1, the structure of the vehicle seat 1 containing the Pelvic support apparatuses 10 and 100 of this invention is demonstrated. As shown in FIG. 1, the vehicle seat 1 includes a seat back 2 that supports the back of the seated person, a seat cushion 3 that supports the buttocks of the seated person, and a headrest 6 that supports the head of the seated person. Each part is configured by embedding a pad material (not shown) in a frame as its skeleton and covering it with a sheet skin material.

  In the seat back 2, the substantially rectangular seat back frame 11 that forms the skeleton of the seat back 2 is connected to the rear end portion of the seat cushion frame 111 that forms the skeleton of the seat cushion 3 at the lower end thereof. The connecting portion is provided with a reclining mechanism 4 that can adjust the angle of the seat back frame 11. A cylindrical pillar support portion (not shown) is attached to the center of the upper end of the seat back frame 11. And the headrest pillar 5 extended from the lower end of the headrest 6 is inserted in this pillar support part, and the headrest 6 is attached to the seat back 2 so that a vertical movement is possible. The seat cushion frame 111 is provided on a slide mechanism 104 of a vehicle body (not shown) so as to be slidable in the front-rear direction.

  A Pelvic support device 10 for a vehicle seat 1 according to the present invention is built in a seat back 2 and supported by a seat back frame 11. As shown in FIG. 2, the seat back frame 11 connects the upper frame 12 fixed substantially horizontally to the upper part, the lower frame 13 fixed substantially horizontally to the lower part, and the left and right ends of the upper frame 12 and the lower frame 13. It consists of a pair of left and right side frames 14. The upper frame 12, the lower frame 13, and the pair of side frames 14 form a substantially rectangular frame.

  As shown in FIGS. 2 and 3, the seat back support member of the Pelvic support device 10 that is embedded in the seat back 2 and receives back pressure is vertically divided into two in the portion corresponding to the seat back frame 11. One member is an upper support member 16 disposed on the seat back frame 11 above an intermediate portion in the vertical direction of the seat back frame 11. The upper support member 16 is elastically supported on the upper frame 12 of the seat back frame 11 by a plurality of connecting wires 17 coupled to the upper end. The upper support member 16 is also elastically supported on the side frame 14 of the seat back frame 11 by a plurality of connecting wires 18 coupled to both end faces. The other of the seat back support members is a lower support member 19 located below the middle portion of the seat back frame 11.

  The upper support member 16 is provided with a plurality of pin brackets 20 along the left-right direction at positions corresponding to the middle portions of the side frames 14, and a plurality of pin support brackets 20 are also provided along the left-right direction at the upper end of the lower support member 19. A pin bracket 21 is provided. Both pin brackets 20 and 21 and pins 22 fitted to these pin brackets 20 and 21 form a pivot 23 extending left and right at a position corresponding to the intermediate portion, and an upper support via this. A plate-like lower support member 19 is pivotally supported with respect to the member 16.

  As shown in FIG. 3, the lower support member 19 is pivoted around the pivot 23 by the screw shaft 24. A bracket 25 is fixed to the lower end portion of the upper support member 16. The screw shaft 24 that is disposed through the strip hole of the bracket 25 from the rear is pivotally supported by a receiving metal fitting 27 fixed to the rear surface 26 of the lower support member 19 facing the screw shaft 24. The screw shaft 24 is covered with a tension spring 28 to urge the fitting portion of the screw shaft 24 in the axial direction. The screw shaft 24 is connected to a motor 29 as shown in FIG. 6, and the drive of the motor 29 is controlled by turning on and off the switch of the operation panel 8. The motor 29 may be mounted on the rear surface 26 of the lower support member 19.

  The upper support member 16 has a dogleg shape and is arranged so as to incline backward toward the lower side. Thereby, the movable angle range θ around the pivot 23 of the lower support member 19 is widened.

  As shown in FIG. 7, in the relationship with the seated person seated on the vehicle seat 1, the lower support member 19 is provided in portions corresponding to the seated person's pelvis 30 and the lumbar spine 31 in the vertical direction of the pivot 23. A predetermined position is defined.

  As shown in FIG. 6, a plurality of pressure sensors 32, 33 are disposed in a portion corresponding to the lower support member 19 of the seat back 2, and the control device 36 is based on the outputs of these pressure sensors 32, 33. The drive device 37 is controlled. If the detected pressure is small, the control device 36 generates a drive signal for the motor 29 so as to press the lower support member 19 forward toward the seated person. If the detected pressure is too large, the control device 36 generates a drive signal for the motor 29 so as to move the lower support member 19 backward from the seated person. The pressure sensors 32 and 33 are provided at portions corresponding to the pelvis 30 and the lumbar spine 31 of the seated person.

  The operation and effect of the Pelvic support device 10 configured as described above will be described.

  As shown in FIG. 7 in contrast with the dotted line and the solid line, there is an individual difference in the angle of the pelvis 30 at the time of sitting depending on how the muscles around the pelvis 30 and the lumbar vertebra 31 are attached or the hardness of the muscles. As a result, individual differences occur in the body pressure distribution in the pelvis and waist. Among these, the individual difference between the forward and backward tilts of the pelvis 30 described in FIG. 7 in contrast with the dotted line and the solid line particularly has a great influence on the positional relationship between the vehicle seat 1 and the seated person. As shown by a dotted line in FIG. 7, in the case of an individual in which the pelvis 30 is tilted forward, a gap is generated between the seated person and the seat back 2, and only the pelvis 30 and muscles around the pelvis 30 and the lumbar vertebra 31 are The lumbar spine 31 is supported, and the seated person is likely to get tired. In this case, the portion of the seat back 2 corresponding to the pelvis 30 and the lumbar vertebra 31 is pushed further forward to increase the pressure, thereby reducing the burden on the seated person.

  On the other hand, as shown by a solid line in FIG. 7, in the case of an individual in which the pelvis 30 is tilted backward, the space between the seated person and the seat back 2 is clogged, and the seated person is pressed against the muscles around the pelvis 30 and the lumbar spine 31. , Blood circulation worsens. The uncomfortable feeling of the seated person also increases when the pressed portion is brought into close contact with the skin due to the delay in drying of sweat. In this case, the part of the seat back 2 corresponding to the pelvis 30 and the lumbar vertebra 31 is further lowered to reduce the burden on the seated person.

  In order to cope with the individual differences of the human body as described above, the conventional lumbar support device has been devised in which air bags are arranged in various places on the seat back 2 to control the pressing locally. This is explained in the background section. However, if the air bag is relatively small, the seat back 2 is pressed with a small spot diameter R as shown in FIG. Due to the pressure difference localized at the pelvis 30 and the lumbar spine 31 of the seated person, the burden on the pelvis 30 and the lumbar spine 31 increases after a long time.

  On the other hand, in this embodiment, as shown in FIGS. 2 and 3, the Pelvic support device 10 includes a plate-like member that is divided into two parts, specifically, an upper support member 16 supported by the seat back frame 11. And a lower support member 19 that pivots about a pivot 23 that is pivotally supported by the upper support member 16 so that the parts corresponding to the pelvis 30 and the lumbar vertebra 31 of the seated person are at a predetermined pressure. The device 36 controls the driving device 37 to rotate and drive the screw shaft 24 by the motor 29, press the rear surface 26 of the lower support member 19 by the screw shaft 24, and adjust the pressing of the portions corresponding to the pelvis 30 and the lumbar spine 31. To do. In this way, the Pelvic support device 10 presses the parts corresponding to the pelvis 30 and the lumbar spine 31 of the seated person by the plate-like lower support member 19 that pivots back and forth. The lower support member 19 has a flat plate shape with an infinite curvature radius at a portion in contact with the seated person, so that excessive concentration of pressing due to the convex shape can be avoided. That is, the Pelvic support device 10 can squeeze and press the target on the pelvis 30 and the lumbar spine 31 of the seated person while reducing the pressure difference localized on the pelvis 30 and the lumbar spine 31 of the seated person. Then, the Pelvic support device 10 supports the pelvis 30 and the lumbar vertebra 31 with the lower support member 19 and adjusts the angle of the lower support member 19 around the pivot 23 so as to obtain an appropriate body pressure value for the person. The pressure of the pelvis 30 and the lumbar spine 31 can be adjusted by adjusting the pressure of the pelvis 30 and the lumbar 31 can be reduced.

  The Pelvic support device 10 of the present embodiment achieves this effect at a low cost with a relatively simple configuration. The support member is divided into two parts, which is the lowest division unit, and it is easy to manufacture the support member and is economical.

  In the Pelvic support device 10 of the present embodiment, only the lower support member 19 is movable relative to the seat back 2, and the upper support member 16 is fixed to the seat back 2. Since the reclining mechanism 4 originally provided in the vehicle seat 1 can control the rearward tilt of the upper portion of the seatback 2, this mode controls the rearward tilt of each support member with a mechanism having the simplest movable part. Give the effect of being the most economical.

  The reason why the lower support member 19 is a plate-like member in the Pelvic support device 10 of the present embodiment is that when the pressure is pressed by a member having a curvature such as spot pressing by an air bag, a body pressure locally increases. This is to avoid this. With the substantially flat plate-like member, it is possible to achieve an effect of distributing body pressure, avoiding a burden on the human body, and reducing a fatigue burden.

  The Pelvic support device 10 of this embodiment pivots the lower support member 19 around the pivot 23 as shown in FIG. The reason why the pivot 23 is around is that the Pelvic support device 10 does not support the rotating body, so that it is not necessary to produce a smooth rotation, and a simple structure such as a hinge structure is sufficient. Therefore, if it is set as a pivot, the effect of being economical can be obtained.

  The Pelvic support device 10 of this embodiment adjusts the angle around the pivot 23 of the lower support member 19. For example, in the case of an individual in which the pelvis 30 is tilted backward, the seat back 2 is further lowered to lower the pressure. Thereby, the occurrence of a step at the connecting portion between the upper support member 16 and the lower support member 19 is prevented. For example, compared to moving the plate-like member back and forth on a horizontal plane, the Pelvic support device of the present invention can suppress the occurrence of a pressure difference in the pressed portion by preventing the occurrence of a step, and is preferable in terms of dispersion of body pressure. The effect is given.

  In the Pelvic support device 10 of the present embodiment, the drive device 37 includes a motor 29 that is a power source of the screw shaft 24 as shown in FIG. The drive device 37 is controlled by the drive signal of the motor 29 from the control device 36. A plurality of pressure sensors 32 and 33 are provided at portions corresponding to the pelvis 30 and the lumbar spine 31 of the seated person near the inner surface of the skin sheet of the seat back 2. The pressure sensors 32 and 33 generate pressure signals that are input signals to the control device 36.

  When the seated person operates the Pelvic support device 10 with a switch on the operation panel 8, the pressure sensors 32 and 33 transmit a pressure signal to the control device 36 in response to a data sampling trigger signal from the control device 36. The data input module of the control device 36 takes in the signal output of the pressure sensors 32 and 33 into the control device 36 from the data input terminal. The data conversion module of the control device 36 converts the signals of the pressure sensors 32 and 33 into data suitable for use of the determination module, and stores the data in the memory together with the sampling time. The determination module of the control device 36 reads the signal data of the plurality of pressure sensors 32 and 33 from the memory, and performs mutual adjustment of data such as time adjustment. The determination module reads a predetermined determination criterion determined in advance from the memory. The determination module compares the determination criterion with a plurality of pressure values, and determines the target positions of the upper support member 16 and the lower support member 19 with respect to the future target time. The control module creates output data to the drive device 37 according to the target position with respect to the target time. The output module of the control device 36 outputs the output data to the drive device 37 from the output terminal to the drive device 37. The motor 29 of the drive device 37 receives the motor control signal, and is normally or reversely driven so as to be set at the designated position at the designated time, and is held at that position after being set at the designated position. In this way, the rotation of the screw shaft 24 connected to the motor rotation shaft is controlled.

  The screw shaft 24 controls the distance between the upper support member 16 and the lower support member 19. The upper support member 16 and the lower support member 19 are urged in the closing direction by the urging force of the tension spring 28 placed on the screw shaft 24, and the screw shaft 24 and the strip hole provided in the bracket 25 are urged. Backlash, which can occur between, is prevented. Due to the rotation of the screw shaft 24, the strip hole of the bracket 25 incorporated in the upper support member 16 varies the inter-plate length of the screw shaft 24 between the upper support member 16 and the lower support member 19 in the thickness direction of the plate. When the screw shaft 24 is rotated by the rotation of the motor 29, the strip holes provided in the bracket 25 that meshes with the helical concave groove provided in the screw shaft 24 are the upper support member 16 and the lower portion of the screw shaft 24. The distance between the support member 19 is varied. When the motor 29 is rotated forward, the tip of the screw shaft 24 pushes the rear surface 26 of the lower support member 19 and pushes the lower support member 19 forward against the urging force. Therefore, the pressure increases as the screw shaft 24 rotates. When the screw shaft 24 is reversed, the distance between the upper support member 16 and the lower support member 19 of the screw shaft 24 decreases, and the lower support member 19 is pulled backward by the urging force. Accordingly, the pressure is reduced by the reverse rotation of the screw shaft 24. In this way, the periphery of the pivot 23 is rotated back and forth.

  The movement of the lower support member 19 in the front-rear direction by pivoting around the pivot 23 changes the positional relationship between the pad in the seat back 2 and the seated person by the lower support part, and the pressure sensors 32 and 33 send pressure signals. Update, wait for the data sampling trigger signal from the control device 36 again, and repeat the previous processing.

  The control device 36 and the drive device 37 individually control the pressing of the corresponding portions of the pressure sensors 32 and 33, thereby providing an effect of further distributing body pressure. Furthermore, various modes are prepared in the logic of the determination module. In the individual mode, the control device 36 may control the driving device 37 so that the detection values of the pressure sensors 32 and 33 are within a predetermined pressure range. In the combined mode, the control device 36 may control the drive device 37 so that the pressure difference between the plurality of pressure sensors 32 and 33 falls within a predetermined pressure range. In another combined mode, the control device 36 may control the driving device 37 so that the pressure ratio of the plurality of pressure sensors 32 and 33 falls within a predetermined pressure ratio range.

  Next, the Pelvic support device 100 provided in the seat cushion 3 of the vehicle seat 1 according to the present invention will be described.

  As shown in FIGS. 4 and 5, the seat cushion frame 111 includes a front frame 112 fixed substantially horizontally at the front, a rear frame 113 fixed substantially horizontally at the rear, a front frame 112 and a rear frame 113. It comprises a pair of side frames 114 that connect the left and right ends of the two. A substantially rectangular frame is formed by the front frame 112, the rear frame 113, and the pair of side frames.

  As shown in FIGS. 4 and 5, the seat cushion support member of the Pelvic support device 100 that is embedded in the seat cushion 3 and receives back pressure is divided into two parts in the front-rear direction at a portion corresponding to the seat cushion 3. One member is a front support member 116 disposed on the seat cushion frame 111 in front of an intermediate portion in the front-rear direction of the seat cushion frame 111. As shown in FIG. 4, the front support member 116 is elastically supported on the front frame 112 of the seat cushion frame 111 by a plurality of connecting wires 117 coupled to the front end. The front support member 116 is also elastically supported by the side frames 114 of the seat cushion frame 111 by a plurality of connecting wires 118 coupled to both end surfaces. The other of the seat cushion support members is a rear support member 119 located behind the position corresponding to the middle portion of the seat cushion frame 111 in the front-rear direction.

  The front support member 116 is provided with a plurality of pin receiving brackets 120 along the left-right direction at a position corresponding to the middle part of the side frame 114, and a plurality of pin support brackets 119 are also provided along the left-right direction at the front end of the rear support member 119. The pin receiving member 121 is provided. Both pin brackets 120, 121 and the pin 122 fitted to these pin brackets 120, 121 form a pivot 123 extending left and right at a position corresponding to the intermediate portion, and the front portion is interposed therebetween. A plate-like rear support member 119 is pivotally supported by the support member 116.

  As shown in FIG. 5, the rear support member 119 is pivoted about the pivot 123 by the screw shaft 124. A bracket 125 having a streak that fits into the groove of the screw shaft 124 is fixed to the rear end portion of the front support member 116. The screw shaft 124 that is disposed so as to pass through the strip hole of the bracket 125 from the rear is pivotally supported by a support fitting 127 fixed to the rear surface 126 of the front support member 116 facing the screw shaft 124. The screw shaft 124 is covered with a tension spring 128 to urge the fitting portion of the screw shaft 124 in the axial direction. The screw shaft 124 is connected to a motor 129 as shown in FIG. 6, and the motor drive is controlled by turning on and off the switch of the operation panel 8 shown in FIG. The motor 129 may be attached to the lower surface of the rear support member 119.

  The front support member 116 has a dogleg shape and is arranged so as to be inclined downward toward the rear. Thereby, the movable angle range θ around the pivot 123 of the rear support member 119 is widened.

  As shown in FIG. 8, in the relationship with the seated person seated on the vehicle seat 1, the rear support member 119 is provided in the longitudinal direction of the pivot 123 so that the rear support member 119 is provided at the site corresponding to the seated person's isch 30a and the tailbone 30b. A predetermined position is defined.

  As shown in FIG. 6, a plurality of pressure sensors 132 and 133 are disposed in a portion corresponding to the rear support member 119 of the seat cushion 3, and the control device 36 is based on the outputs of these pressure sensors 132 and 133. The drive device 37 is controlled. If the detected pressure is small, the control device 36 generates a motor drive signal that raises the rear end of the rear support member 119 to press the rear support member 119 against the seated person more strongly. If the detected pressure is too large, the control device 36 generates a motor drive signal for lowering the rear end of the rear support member 119 so as to separate the rear support member 119 from the seated person. The pressure sensors 132 and 133 are provided at portions corresponding to the sciatic bone 30a and the tailbone 30b of the seated person.

  The pressure sensors 132 and 133 in FIG. 6 are attached below the seat skin material of the vehicle seat 1 and on the pad material.

  The operation and effect of the Pelvic support device 100 configured as described above will be described.

  As shown in FIG. 8 by comparing the dotted line and the solid line, there is an individual difference in the angle of the pelvis 30 at the time of sitting depending on how the muscles around the pelvis 30 and the lumbar spine 31 are attached or the hardness of the muscles. As a result, individual differences occur in the body pressure distribution in the pelvis and waist. Among these, the individual difference between the forward and backward tilts of the pelvis 30 described in FIG. 8 in contrast with the dotted line and the solid line particularly affects the positional relationship between the vehicle seat 1 and the seated person. As shown by a dotted line in FIG. 8, in the case of an individual in which the pelvis 30 is tilted forward, a gap is generated between the seated person and the seat cushion 3, and the seated person only has muscles around his / her pelvis 30 and the lumbar spine 31. The pelvis 30 and the lumbar spine 31 will be supported, and it will be easy to get tired. In this case, the burden on the seated person is reduced by pushing the rear part of the seat cushion 3 upward and raising the pressure.

  On the other hand, as shown by a solid line in FIG. 8, when the pelvis 30 is tilted backward, the space between the seated person and the seat cushion 3 is blocked, and the seated person is pressed against the muscles around the pelvis 30 and the lumbar spine 31. , Blood circulation worsens. Discomfort also increases when the pressed part is in close contact with the skin due to the delay in drying of sweat. In this case, the burden on the seated person is reduced by lowering the rear part of the seat cushion 3 downward and lowering the pressure.

  In order to cope with the individual differences to the human body as described above, the conventional vehicle seat 1 has been devised by arranging air bags at various positions of the seat cushion 3 and locally controlling the pressing. As described in the section. However, if the air bag is relatively small, the seat cushion 3 presses the human body with a small spot diameter R as shown in FIG. Due to the pressure difference localized in the portion corresponding to the pelvis 30 and the lumbar vertebra 31 of the seated person, the burden on the pelvis 30 and the lumbar vertebra 31 increases after a long time.

  On the other hand, in this embodiment, as shown in FIGS. 4 and 5, the Pelvic support device 100 includes a plate-like member that is divided into two parts in the front and rear direction, specifically, a front support member 116 that is supported by the seat cushion frame 111. And a rear support member 119 that pivots about a pivot 123 pivotally supported by the front support member 116 so that the portions corresponding to the sciatic bone 30a and the tailbone 30b of the seated person are in a predetermined pressure, The control device 36 controls the drive device 37 to rotationally drive the screw shaft 124 by the motor 129 and adjust the pressing of the portions corresponding to the sciatic bone 30a and the tailbone 30b by the movement of the plate-like rear support member 119. In this way, the Pervik support device 100 controls the pressure by the rear support member 119 that sinks from the upper side to the lower side toward the hips, or rises from the lower side to the upper side, corresponding to the seated person's ischia 30a and the tailbone 30b. The pressure is controlled by the rear support member 119. In this way, the Pelvic support device 10 can press the pelvis 30 of the seated person from below and reduce the localized pressure of the part corresponding to the lumbar spine 31 while squeezing and pressing the target against the pedestal 30 of the seated person. The pelvis 30 is supported by the posterior support member 119 so as to obtain an appropriate body pressure value for the person, and the pressure is adjusted by adjusting the angle of the posterior support member 119 around the pivot 123, thereby compressing the lumbar 31. The effect of reducing the feeling of fatigue due to is obtained.

  The Pelvic support device 100 of the present embodiment achieves this effect at a low cost with a relatively simple configuration.

  The support member is divided into two parts because this is the lowest division unit. The effect is that it is the easiest to manufacture and economical.

  The reason why the lower support member 19 is a flat plate in the Pelvic support device 100 according to the present embodiment is to avoid this because the body pressure locally increases when pressed by a member having a curvature such as spot pressing by an air bag. Because. A plate-like member called a flat plate can achieve the effects of dispersing body pressure, avoiding the burden on the human body, and reducing the fatigue burden.

  As shown in FIG. 5, the Pelvic support device 100 of the present embodiment pivots the rear support member 119 around the pivot axis 123. The reason why the rotation around the pivot 123 is that the Pelvic support device 100 does not support the rotating body, so that it is not necessary to generate a smooth rotation, and a simple structure such as a hinge structure is sufficient. The effect is given.

  In the Pelvic support device 100 of the present embodiment, the angle around the pivot axis 123 is adjusted when the seat cushion 3 is lowered downward in the case of the individual in which the pelvis 30 is tilted backward, and the pressure is lowered. It is possible to prevent the occurrence of a step at the connection portion between the front support member 116 and the rear support member 119, and to suppress the occurrence of a pressure difference more than when the flat plate is moved back and forth on a horizontal plane, and is good in terms of dispersion of body pressure. It is.

  As shown in FIG. 6, the power source of the screw shaft 124 of this embodiment is a motor 129, and the drive device 37 includes a motor 129. The drive device 37 of the Pelvic support device 100 is controlled by a drive signal of the motor 129 generated by the control device 36. A plurality of pressure sensors 132 and 133 are provided at portions corresponding to the pelvis 30 and the lumbar spine 31 of the seated person near the inner skin of the seat cushion 3. The pressure sensors 132 and 133 generate pressure signals that are input signals to the control device 36.

  When the seated person operates the Pelvic support device 100 with a switch on the operation panel 8, the pressure sensors 132 and 133 transmit pressure to the control device 36 by a data sampling trigger signal from the control device 36. The data input module of the control device takes the pressure sensor signal output into the control device 36 from the data input terminal. The control device 36 converts the signals of the pressure sensors 132 and 133 into data suitable for use of the determination module by the data conversion module, and stores it in the memory together with the sampling time. The control device 36 reads a plurality of pressure sensor signal data from the memory, and a determination module that performs mutual comparison of data such as time adjustment adjusts to a format that contributes to mutual use, and then compares the plurality of pressure values. The determination module reads a predetermined determination criterion determined in advance from the memory. The determination module compares the determination criterion with a plurality of pressure values, and determines the target position of the rear support member 119 with respect to the future target time. The control module creates output data to the drive device 37 according to the target position with respect to the target time. The output module of the control device 36 outputs the output data to the drive device 37 from the output terminal to the drive device 37. The motor 129 of the driving device 37 receives the motor control signal, and is normally or reversely driven so as to be set at the designated position at the designated time, and is held at that position after being set at the designated position. In this way, the rotation of the screw shaft 124 connected to the motor rotation shaft is controlled.

  The screw shaft 124 controls the distance between the front support member 116 and the rear support member 119. The front support member 116 and the rear support member 119 are urged toward each other by the urging force of the tension spring 128 applied to the screw shaft 124, and backlash of the screw shaft 124 is prevented. By rotation of the screw shaft 124, the strip hole of the bracket 125 fixed to the front support member 116 changes the screw shaft length between the front support member 116 and the rear support member 119 in the thickness direction of the plate. The distance between the front support member 116 and the rear support member 119 is changed while the front end of the screw shaft 124 is pivotally supported by the receiving bracket 127 incorporated in the rear support member 119 by the biasing force of the tension spring 128. The support member 119 is pivoted around the pivot 123.

  The pivoting of the rear support member 119 changes the positional relationship between the pad in the seat cushion 3 and the seated person by the rear support member 119, and the pressure sensors 132 and 133 update the pressure signal, and again from the control device 36. Wait for the data sampling trigger signal and repeat the previous process.

  The control device 36 and the drive device 37 individually control the pressure on the corresponding portions of the pressure sensors 132 and 133, thereby providing an effect of achieving better body pressure dispersion. Furthermore, various modes are prepared in the logic of the determination module. In the individual mode, the control device 36 may control the drive device 37 so that the detection value of each pressure sensor falls within a predetermined pressure range. In the combined mode, the control device 36 may control the drive device 37 so that the pressure differences of the plurality of pressure sensors are within a predetermined pressure range. In the second combined mode, the control device 36 may control the drive device 37 so that the pressure ratios of the plurality of pressure sensors are within a predetermined pressure ratio range.

  As described above, if the portions corresponding to the pelvis 30 and the lumbar vertebra 31 of the seated person are pressed by the plate-like lower support member 19 that rises or sinks toward the buttocks, they are localized at the pelvis 30 and the lumbar 31 of the seated person. It is possible to concentrate and press on the pelvis 30 and lumbar spine 31 of the seated person while reducing the pressure difference. Then, the Pelvic support device 100 supports the pelvis 30 with the rear support member 119 so as to obtain an appropriate body pressure value for the person, and adjusts the angle of the rear support member 119 around the pivot 123. The effect of reducing the feeling of fatigue due to compression of the lumbar spine 31 is obtained by adjusting the amount of support.

  The front support member 116 has a dogleg shape and is arranged so as to incline downward toward the rear, so that the movable angle range θ around the pivot 123 of the rear support member 119 is widened.

  In this embodiment, as shown in FIG. 6, the pressure sensors 132 and 133 disposed on the seat cushion 3 corresponding to the rear support member 119 correspond to the seated person's sciatica 30a and the coccyx (coccyx) 30b. The control device 36 controls the drive device 37 based on the outputs of the pressure sensors 132 and 133 with respect to the pressures of the parts corresponding to the seated bone 30a and the tailbone 30b. If the detected pressure is small, the control device 36 drives and controls the motor 129 so as to push up the rear support member 119 more. If the detected pressure is too strong, the control device 36 drives and controls the motor 129 so as to lower the rear support member 119. If the pressure is measured in this manner, it is more suitable for pressing control of the pelvis 30 and the lumbar spine 31 of the seated person.

  Further, by interlocking the Pelvic support device 10 provided on the seat back 2 and the Pelvic support device 100 provided on the seat cushion 3, as shown in FIG. 10, a lower support member 19 and a rear support member 119 are provided. Cooperate with each other to support the pelvis 30 so as to obtain an appropriate body pressure value for the person, and to obtain an effect of reducing fatigue due to the compression of the lumbar spine 31.

  Next, Pelvic support devices 200 and 300 for the vehicle seat 1 according to another embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member same as the said embodiment, and the overlapping description is abbreviate | omitted.

  In the Pelvic support devices 200 and 300 according to other embodiments, as shown in FIG. 11, the power of the drive device 237 is air pressure generated by the pumps 229 and 329.

  The Pelvic support device 200 includes a drive device 237 and an air bladder 224 provided between the upper support member 16 and the lower support member 19. Air pressure is applied to the air bladder 224 from the pump 229 via the valve 230, and the air bladder 224 drives the lower support member 19. The pump 229 is controlled by the control device 236. The rest is the same as the Pelvic support device 10 of the seat back 2 described above. In the Pelvic support device 200, the power source is changed from a motor to air pressure, and the drive actuator is changed from a screw shaft method to an air bladder method, and the same effects as the Pelvic support device 10 of the above embodiment are exhibited.

  When the seated person operates the Pelvic support device 200 with a switch on the operation panel 8, the pressure sensors 32 and 33 transmit a pressure signal to the control device 236 according to a data sampling trigger signal from the control device 236. The data input module of the control device 236 takes in the signal output of the pressure sensors 32 and 33 from the data input terminal into the control device 236. The data conversion module of the control device 236 converts the signals of the pressure sensors 32 and 33 into data suitable for use of the determination module, and stores the data together with the sampling time in the memory. The determination module of the control device 236 reads the signal data of the plurality of pressure sensors 32 and 33 from the memory, and performs mutual adjustment of data such as time adjustment. The determination module reads a predetermined determination criterion determined in advance from the memory. The determination module compares the determination criterion with a plurality of pressure values, and determines the target positions of the upper support member 16 and the lower support member 19 with respect to the future target time. The control module creates output data to the drive device 237 of the Pelvic support device 200 according to the target position with respect to the target time. The output module of the control device 236 outputs output data to the drive device 237 of the Pelvic support device 200 from the output terminal to the drive device 237 of the Pelvic support device 200. The pump 229 and the valve 230 of the driving device 237 of the Pelvic support device 200 receive the control signal and adjust the air pressure and the air amount in the air bladder 224 so as to be set at the designated position at the designated time. The pump 229 and the valve 230 are held after being set to the specified pressure. In this way, the shape of the air bladder 224 sandwiched between the upper support member 16 and the lower support member 19 is pneumatically controlled.

  The air bladder 224 controls the distance between the upper support member 16 and the lower support member 19. The upper support member 16 and the lower support member 19 are biased in a closing direction by a biasing force of a tension spring (not shown) stretched between the upper support member 16 and the lower support member 19. The distance between the upper support member 16 and the lower support member 19 is changed by the expansion and contraction of the air bladder 224. When the air bladder 224 is inflated, the air bladder 224 pushes the rear surface 26 of the lower support member 19 and pushes the lower support member 19 forward against the urging force. Accordingly, the pressure is increased by the expansion of the air bladder 224. When the air bladder 224 is contracted, the distance between the upper support member 16 and the lower support member 19 decreases, and the lower support member 19 is pulled backward by the biasing force. Therefore, the pressure is reduced by the contraction of the air bladder 224. Thus, the lower support member 19 is pivoted around the pivot 23 in the front-rear direction.

  The Pelvic support device 200 that operates as described above has the same effect as the Pelvic support device 10 of the above-described embodiment, supports the occupant with a body pressure value appropriate for the person, and feels fatigue due to compression of the waist. To reduce.

  The movement of the lower support member 19 in the front-rear direction by pivoting around the pivot 23 changes the positional relationship between the pad in the seat back 2 and the seated person by the lower support portion, and the pressure sensors 32 and 33 update the pressure signal. Then, again, a data sampling trigger signal from the control device 236 is awaited, and the previous processing is repeated.

  The Pelvic support device 200 that operates as described above has a feedback control effect, is more accurate, supports the occupant with a body pressure value appropriate for the person, and further reduces the feeling of fatigue due to compression of the waist.

  The Pelvic support device 300 includes a drive device 237 and an air bladder 324 provided between the front support member 116 and the rear support member 119. The air bladder 324 is supplied with air pressure from the pump 329 via the valve 330 to drive the rear support member 119. The pump 329 is controlled by the control device 236. Other than this, the configuration is the same as that of the Pelvic support device 100 of the seat cushion 3 described above. In the Pelvic support device 300, as in the Pelvic support device 200 of the above embodiment, the power source is changed from a motor to air pressure, and the drive actuator is changed from a screw shaft method to an air bladder method. The same effect is exhibited.

  When the seated person operates the Pelvic support device 300 with a switch on the operation panel 208, the pressure sensors 132 and 133 transmit a pressure signal to the control device 236 by a data sampling trigger signal from the control device 236. The data input module of the control device 236 takes in the signal output of the pressure sensors 132 and 133 from the data input terminal into the control device 236. The data conversion module of the control device 236 converts the signals of the pressure sensors 132 and 133 into data suitable for use of the determination module, and stores the data together with the sampling time in the memory. The determination module of the control device 236 reads the signal data of the plurality of pressure sensors 132 and 133 from the memory, and performs mutual adjustment of data such as time adjustment. The determination module reads a predetermined determination criterion determined in advance from the memory. The determination module compares the determination criterion with a plurality of pressure values, and determines the target positions of the front support member 116 and the rear support member 119 with respect to the future target time. The control module creates output data to the driving device 237 of the Pelvic support device 300 according to the target position with respect to the target time. The output module of the control device 236 outputs the output data to the pump 329 and the valve 330 to the drive device 237 of the Pelvic support device 300 from the output terminal. The pump 329 and the valve 330 of the Pelvic support device 300 receive the control signal, and the air pressure and the air amount in the air bladder 324 are adjusted so as to be set at the designated position at the designated time. Hold. In this manner, the shape in the air bladder 324 sandwiched between the front support member 116 and the rear support member 119 is controlled.

  The air bladder 324 controls the distance between the front support member 116 and the rear support member 119. The front support member 116 and the rear support member 119 are biased in a closing direction by a biasing force of a tension spring (not shown) stretched between the front support member 116 and the rear support member 119. The distance between the front support member 116 and the rear support member 119 is changed by the expansion and contraction of the air bladder 324. When the air bladder 324 is inflated, the air bladder 324 pushes the rear surface 126 of the rear support member 119 and pushes the rear support member 119 upward against the urging force. Accordingly, the pressure is increased by the expansion of the air bladder 324. When the air bladder 324 is contracted, the distance between the front support member 116 and the rear support member 119 decreases, and the rear support member 119 is pulled backward by the biasing force. Accordingly, the pressure is reduced by the contraction of the air bladder 324. Thus, the rear support member 119 is pivoted up and down around the pivot 123.

  The Pelvic support device 300 that operates as described above has the same effects as the Pelvic support device 100, supports the occupant with a body pressure value appropriate for the person, and reduces the feeling of fatigue due to compression of the waist.

  The movement of the rear support member 119 in the vertical direction by pivoting around the pivot 123 changes the positional relationship between the pad in the seat back 2 and the seated person by the rear support portion, and the pressure sensors 132 and 133 send pressure signals. Update, wait for the data sampling trigger signal from the control device 236 again, and repeat the previous processing.

  Further, the output values of all the pressure sensors 32, 33, 132, and 133 are used simultaneously, and the air bladder 324 between the front support member 116 and the rear support member 119 is used to control the upper support member 16 and the lower support member 19. The sensitivity by the control is taken in, the sensitivity by the control of the air bladder 224 between the upper support member 16 and the lower support member 19 is taken into the control of the front support member 116, and the mutual interference between the control of the air bladder 224 and the control of the air bladder 324 is taken into consideration. In addition, both air bladders may be integrated and controlled.

1: Vehicle seat 2: Seat back 3: Seat cushion 8: Operation panel (manual input device)
10: Pelvic support device 11: Seat back frame 16: Upper support member 19: Lower support member 23: Axis 29: Motor 30: Pelvis 30a: Sciatic bone 30b: Coccyx 31: Lumbar spine 32: Pressure sensor 33: Pressure sensor 36: Control Device 37: Drive device 100: Pelvic support device 111: Seat cushion frame 116: Front support member 119: Rear support member 123: Axis 129: Motor 132: Pressure sensor 133: Pressure sensor 200: Pelvic support device 208: Operation Panel (manual input device)
224: Air bladder 236: Control device 237: Drive device 229: Pump 230: Valve 300: Pelvic support device 324: Air bladder 329: Pump 330: Valve

Claims (10)

A Pervik support device used for a vehicle seat comprising a seat cushion and a seat back coupled to a rear end of the seat cushion,
An upper support member supported on a seat back frame provided in the seat back so as to be disposed above an intermediate portion in the vertical direction of the seat back;
A plate-like lower support member pivotally supported by the upper support member via a pivot extending left and right at a position corresponding to the intermediate portion;
A drive for adjusting the angle of the lower support member about the pivot;
A Pelvic support device having a control device for controlling the drive device.   The perbic support device according to claim 1, wherein the lower support member is provided at a portion corresponding to a pelvis and a lumbar vertebra of a seated person.   The Pelvic support device according to claim 1 or 2, wherein the control device has a manual input device.   The pel according to claim 1, further comprising a pressure sensor disposed in a portion corresponding to the lower support member of the seat back, wherein the control device controls the driving device based on an output of the pressure sensor. Big support device.   The perbic support device according to claim 4, wherein the pressure sensor includes a plurality of pressure sensors provided at portions corresponding to a pelvis and a lumbar vertebra of a seated person. A Pervik support device used for a vehicle seat comprising a seat cushion and a seat back coupled to a rear end of the seat cushion,
A front support member supported on a seat cushion frame provided in the seat cushion so as to be disposed forward of an intermediate portion in the front-rear direction of the seat cushion;
A plate-like rear support member pivotally supported by the front support member via a pivot extending left and right at a position corresponding to the intermediate portion;
A drive for adjusting the angle of the rear support member about the pivot;
A Pelvic support device having a control device for controlling the drive device.   The Perbic support device according to claim 6, wherein the rear support member is provided at a portion corresponding to a sciatic bone and a coccyx bone of a seated person.   The Pelvic support device according to claim 6 or 7, wherein the control device has a manual input device.   The pel of claim 6 or 7, further comprising a pressure sensor disposed in a portion of the seat back corresponding to the rear support member, wherein the control device controls the driving device based on an output of the pressure sensor. Big support device.   The perbic support device according to claim 9, wherein the pressure sensor includes a plurality of pressure sensors provided at portions corresponding to the sciatic bone and the coccyx bone of the seated person.

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