JP2014034260A - Supporter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve supporting capability for the waist by a supporter fitted detachably to a vehicle seat.SOLUTION: A supporter 10 is fitted detachably to a border part between a seat back 2 and a seat cushion 3 of a vehicle seat 1, and supports the waist of a sitting passenger. The supporter 10 includes a center support part 11 which is supported by a back surface 2B1 in the width-directional center of the seat back 2 from behind to support the waist from behind, and side support parts 12 which are formed on both the right and left sides of the center support part 11 and supported by back surfaces 2C1 of the seat back 2 on both the right and left sides to support the waist. The side support parts 12 are formed such that side support surfaces 12A to which the waist is applied are tilted forward to face a center support surface 11A, to which the waist is applied, of the center support part 11 inward, and then support the wasit from both outer sides.

Description

  The present invention relates to a support device. Specifically, the present invention relates to a support device that is attached to a boundary portion between a seat back of a vehicle seat and a seat cushion and supports a waist of a seated occupant.

  2. Description of the Related Art Conventionally, in a vehicle seat, a configuration is known in which a detachable support tool is attached to a boundary portion between a seat back and a seat cushion in order to improve support performance of a seated occupant's waist (Patent Document 1). . This support device has a structure with a cushion pad inside, and is provided at the boundary portion to compensate for the gap between the seat cushion and the seat cushion that is evacuated so as not to inhibit the tilting of the seat back. It is configured to improve the support of the waist.

Utility Model Registration No. 3013695

  However, the support tool disclosed in Patent Document 1 has a configuration in which the support surface that supports the waist portion is flat in the seat width direction, and thus cannot provide sufficient support according to the shape of the waist portion. ing. The present invention was created as a solution to the above problem, and the problem to be solved by the present invention is to improve the support of the waist by a support device that is detachably attached to a vehicle seat. is there.

In order to solve the above problems, the support tool of the present invention takes the following means.
1st invention is the support tool which is attached to the boundary part of the seat back of a vehicle seat, and a seat cushion so that attachment or detachment is possible, and supports a seat crew member's waist. This support device is formed on the left and right sides of the central support part, and the central support part that supports the waist of the seated occupant from the rear side by receiving the support from the back side by the backrest surface at the center in the width direction of the seat back. And a side support portion that receives the support from the rear side by the backrest surfaces of the left and right sides of the seat back and supports the waist of the seated occupant. Each side support part is located on the front side so that each side support surface to which the seated occupant's lumbar part is assigned faces inward with respect to the center support surface to which the seat occupant's lumbar part is assigned. It is formed in a shape that supports the waist of the seated occupant from both outsides.

  According to the first invention, the support device that can support the waist of the seated occupant from the rear side is formed in a shape in which each side support surface is inclined forward with respect to the center support surface, A side support function that can support the waist of the seated occupant from both outsides is also provided. Specifically, the support device is provided in a state in which each side support portion is supported from the rear side by the backrest surfaces of the left and right sides of the seat back, and therefore, the side support surfaces strongly support the occupant's lumbar region by the side support surfaces. Can be done. In this way, the support device can favorably support the waist of the seated occupant.

  The second invention is the following configuration in the first invention described above. The seat back includes a side support part that supports the back part of the seated occupant from both outsides by tilting forward so that the backrest surfaces on both the left and right sides are inward of each other with respect to the central backrest surface. It is made into a shape. Each side support part has a shape that protrudes to the front side, and the protrusion length from the middle part in the height direction toward the lower part gradually decreases in order to ensure the tiltability of the seat back. It is said that. Each side support portion of the support device is provided so as to be applied to a portion where the protruding length toward the front side of each side support portion of the seat back is gradually shortened.

  According to the second aspect of the present invention, each side support portion of the support device is provided so as to be applied to a portion where the protruding length toward the front side of each side support portion set in the seat back gradually decreases. The support function of the lower portion where the side support function is weakened can be satisfactorily compensated without excessive protrusion of the intermediate part of each side support part. Therefore, the entire back portion of the seated occupant can be side-supported in a wide and good shape.

  The third invention is the following configuration in the first or second invention described above. The upper surface of the central support portion of the support device and the upper surface of each side support portion are formed at the boundary portion between the backrest surface at the center of the seat back where the boundary portions are positioned and the backrest surfaces on the left and right sides, respectively. It is formed in a shape extending obliquely rearward and upward so as to form a mountain shape with each other so as to fit into a concave corner portion.

  According to the third aspect of the present invention, there is no gap between the support device and the concave corner formed at the boundary between the backrest surface at the center of the seat back and the backrest surfaces on the left and right sides. In addition, each support surface of the support tool and each backrest surface of the seat back can be provided in a smoothly connected state. As a result, the support device can be provided in a state where it can look good in a form with a sense of unity with the seat back and can provide a continuous support feeling with no step between the support tool and the seat back.

It is a perspective view which shows the state which attached the support tool of Example 1 to the vehicle seat. It is a perspective view which shows the state which removed the support tool from the vehicle seat. It is the perspective view which looked at the support tool from the back side. It is a front view of a support tool. It is a rear view of a support tool. It is a side view of a support tool. It is a top view of a support tool. It is a bottom view of a support tool. It is the schematic diagram seen by the IX-IX line | wire cut surface of FIG. It is the schematic diagram seen by the XX cut surface of FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the structure of the support tool 10 of Example 1 is demonstrated using FIGS. In the following description, when describing the waist part P of the seated occupant, FIGS. 1 to 8 are not illustrated, and therefore FIGS. 9 to 10 are appropriately referred to. In addition, the shape of the support tool 10 alone is shown in detail in FIGS. 2 to 8 because the shape seen from various angles is shown in detail. Therefore, it is also necessary when the support tool 10 is described with reference to other drawings. 2 to 8 will be referred to as appropriate.

  As shown in FIGS. 1 to 2, the support device 10 of the present embodiment is detachably attached to a vehicle seat 1 configured as a passenger seat of an automobile, thereby improving the supportability of a seated occupant's waist P. It is something to be made. Here, the vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant and a seat cushion 3 that serves as a seating portion. The seat back 2 is connected to the rear end portions of the left and right sides of the seat cushion 3 via the reclining device 5 that functions as a rotation shaft device capable of stopping rotation. It is said that. Thereby, the seat back 2 is in a state in which the backrest angle with respect to the seat cushion 3 can be freely adjusted in the front-rear direction with the respective reclining devices 5 as the center.

  For this reason, the seat back 2 is provided with a slight gap 4 in the height direction between the seat cushion 3 and the seat cushion 3 in order to ensure tiltability in the front-rear direction with respect to the seat cushion 3. The shape of the lower part 2Ba of the central support part 2B facing the boundary part 3 and the lower part 2Cd of each side support part 2C is formed in a rounded shape so as to be pulled backward (FIGS. 2 and 9). reference). Thereby, even if the seat back 2 tilts in the front-rear direction around each reclining device 5 described above, the lower portion 2Ba of the central support portion 2B and the lower portion 2Cd of each side support portion 2C do not interfere strongly with the seat cushion 3. It has become. However, on the other hand, the seat back 2 has a shape in which the lower part 2Ba of the central support part 2B and the lower part 2Cd of each side support part 2C are rounded to the rear side as described above, so that these lower parts 2Ba, 2Cd The supportability of the waist P of the seated occupant is weakened. Therefore, the support device 10 described above is attached to this portion from the front side, so that the support of the weakened waist P is supplemented, and the waist P is supported well.

  Each reclining device 5 described above is normally held in a locked state in which the backrest angle of the seat back 2 is fixed. Each reclining device 5 is operated to release the locked state all at once by an operation of lifting a release lever 5A provided on a side of the seat cushion 3 on the vehicle outer side (right side in the drawing). The back 2 can be switched to a state in which the backrest angle can be freely adjusted in the front-rear direction. In addition, since the basic structure of these reclining apparatuses 5 is the same well-known structure as what was disclosed by literatures, such as Unexamined-Japanese-Patent No. 2011-116303, specific description about these is abbreviate | omitted. .

  Further, a height adjustment lever 6 that is longer than the release lever 5A is provided near the release lever 5A. The height adjusting lever 6 is a lever for operating a lifter mechanism (not shown) that can adjust the height position of the vehicle seat 1 with respect to the floor surface, and its configuration is publicly known (Japanese Patent Laid-Open No. 2011-246024). The detailed description will be omitted. A resin shield 7 is attached to the side of the seat cushion 3 provided with the release lever 5A and the height adjustment lever 6 described above. The resin shield 7 covers the lower region of the side portion of the seat cushion 3 outside the vehicle and the connecting portion between the seat back 2 and the seat cushion 3 by the reclining device 5 described above from the outside. Is provided.

  As shown in FIG. 2, the support tool 10 described above has an insertion plate 14 that extends rearward from the lower part on the back side thereof in the gap 4 between the seat back 2 and the seat cushion 3 from the front side. By being inserted, the insertion plate 14 is pressed between them and is held in a state of being attached to the vehicle seat 1. Specifically, the support device 10 is in a state in which the entire back surface of the support device 10 is widely applied to the seat back 2 and supported from the rear side by inserting the insertion plate 14 into the gap 4. The entire bottom surface is applied to the seat cushion 3 and is supported from below, and is provided in a state of being held between them. Therefore, with this attachment, the support device 10 receives the support from the rear side by the seat back 2 and the support from the lower side by the seat cushion 3, so that the waist portion P of the seated occupant is stably forced at a fixed position. It is designed to be held in a state where it can be received.

  The support tool 10 is easily detached from the vehicle seat 1 by pulling the insertion plate 14 forward from the gap 4. Therefore, when the support device 10 is in the way, such as when the seat back 2 is tilted forward or folded into the upper surface of the seat cushion 3, the support device 10 is simply removed from the vehicle seat 1 as described above. It is convenient because it can.

  Although the illustration of the support tool 10 described above is omitted, a foamed urethane pad is contained inside, and the entire surface thereof is covered with a cloth skin material. Thereby, the support device 10 is configured to have a cushioning property that can softly receive the waist P of the seated occupant with an appropriate hardness. The insertion plate 14 maintains a flat plate shape in a free state, but is formed of a resin plate having rigidity enough to allow the user to bend relatively easily by hand force, and a part of the insertion plate 14 is a bottom portion of the pad. As a state of being embedded in and integrated with the pad, it is provided as a state of extending integrally from the pad to the rear side. As a result, the support tool 10 has a support body that supports the waist P of the seated occupant and inserts the insertion plate 14 into the gap 4, thereby inserting the insertion plate 14 into the gap 4. It can be easily inserted with good operability. Since the insertion plate 14 is provided with flexibility as described above, the insertion plate 14 bends so as to conform to the shape between the seat back 2 and the seat cushion 3 when inserted into the gap 4. The insertion operation into 4 can be easily performed.

  In the support device 10 described above, the support body that supports the waist P of the seated occupant is formed on the left and right sides of the center support 11 and the center support 11 that supports the waist P of the seated occupant from the rear side. The side support part 12 which supports the seat passenger's waist part P from both outer sides is formed. As shown in FIGS. 1 and 9, the center support portion 11 is placed on the backrest surface 2B1 of the center support portion 2B in the center of the seatback 2 in the width direction, and from the rear side by the backrest surface 2B1. The seat occupant's waist P is supported from the rear side. Specifically, as shown in FIG. 9, the central support portion 11 is formed in a triangular shape whose cross section is vertically long, and the rounded lower portion 2Ba and the seat cushion 3 of the central support portion 2B of the seat back 2. This is fitted into a vertically long space 4A recessed in a triangular shape on the rear side formed between the rear portion 3Aa of the central support portion 3A and set in a state of filling the space 4A. .

  More specifically, in the set state, the center support portion 11 has a back surface 11D formed into a backrest surface 2B1 that is rounded to the rear side of the lower portion 2Ba of the center support portion 2B of the seat back 2 described above. The bottom surface 11 </ b> C is formed to match the shape of the seating surface 3 </ b> A <b> 1 of the rear portion 3 </ b> Aa of the central support portion 3 </ b> A of the seat cushion 3. Further, the central support surface 11A which is the front surface of the central support portion 11 is formed in a shape close to an upright surface whose surface is slightly inclined upward. Moreover, the upper surface 11B of the center support part 11 is formed in the shape of the rounded curved surface which inclined the surface to the front side. Thereby, as shown in FIG. 1, the central support portion 11 is formed in a shape that tapers upward, and the central support surface 11 </ b> A (front surface) to which the waist portion P of the seated occupant is applied is formed. The seat back 2 to which the seat occupant's back is applied is smoothly connected to the backrest surface 2B1 of the central support portion 2B of the seat back 2B. It is set to have a continuous feeling.

  As shown in FIGS. 1 and 10, the side support portions 12 are respectively placed on the backrest surfaces 2 </ b> C <b> 1 of the side support portions 2 </ b> C formed on the left and right sides of the seat back 2. In response to the support from the rear side by the surface 2C1, the lumbar part P of the seated occupant is applied from the rear diagonally outer side and supported. Specifically, as shown in FIG. 2, each of the side support portions 12 is formed in a vertically long triangular shape whose cross section is thicker in the front-rear direction than the center support portion 11 described above. In the vertically long space 4B recessed in a triangular shape on the rear side formed between the rounded lower portion 2Cd of each side support portion 2C and the rear portion 3Bc of each side support portion 3B of the seat cushion 3 in which the swelling of the side support portion 3B is suppressed to be small. It is set in a state where it is fitted and the space 4B is filled.

  More specifically, as shown in FIG. 10, the side support portions 12 have their back surfaces 12D rounded to the rear side of the lower portions 2Cd of the side support portions 2C of the seat back 2 described above. 2, the bottom surface 12 </ b> C of the seat cushion 3 has a shape of the seating surface 3 </ b> B <b> 1 of the rear portion 3 </ b> Bc of each side support portion 3 </ b> B, as shown in FIG. 2. It is formed in a shape that matches Further, each side support surface 12A that is the front surface of each side support portion 12 is inclined to the front side so as to be inward of each other, and is formed in a shape close to a standing surface that is slightly inclined upward. Has been. Moreover, the upper surface 12B of each side support part 12 is formed in the shape of the rounded curved surface which inclined the surface to the front side. Accordingly, as shown in FIG. 1, each side support portion 12 is formed in a shape that tapers upward, and each side support surface 12 </ b> A to which the waist portion P of the seated occupant is applied. The front surface is smoothly connected to the backrest surface 2C1 of each side support portion 2C of the seat back 2 to which the seated occupant's back portion is applied, so that the back support and the appearance of each side support portion 2C are also provided. It is set in a state where there is a sense of continuity. More specifically, as shown in FIG. 10, each side support surface 12A described above is smoothly flush with the center support surface 11A so as to wrap the waist P of the seated occupant together with the above-described center support surface 11A. It is formed in a curved shape.

  Here, the respective configurations of the seat back 2 and the seat cushion 3 described above will be described with reference to FIG. Although not shown, the seat back 2 is covered with a foamed urethane pad on the front surface of the internal frame so as to cover the entire frame frame from the front side and the outer peripheral side, and the entire surface of the pad. Further, a cloth skin material is applied and stretched from the outside so as to cover. The seat back 2 has a central portion in the seat width direction configured as a central support portion 2B that supports the back of the seated occupant from the rear side, and swells forward on the left and right sides of the center support portion 2B. The side support portion 2C that can support the back portion of the seated occupant from both outer sides is formed. A headrest portion 2A for supporting the head of the seated occupant from the rear side is formed on the upper portion of the central support portion 2B. Vent holes 2F penetrating in the front-rear direction are formed at two places on the left and right sides between the headrest portion 2A and the center support portion 2B.

  In each side support portion 2C of the seat back 2, the backrest surface 2C1 (front surface) to which the back of the seated occupant is applied is inward with respect to the backrest surface 2B1 (front surface) of the center support portion 2B. In this way, the back is tilted to the front side, and the back part of the seated occupant is applied from the diagonally rearward side and supported. Thus, the seat back 2 is in a shape in which the side support portions 2C on both the left and right sides bulge so as to protrude obliquely toward the front side with respect to the central support portion 2B on which the back of the seated occupant is leaned. Is formed. Further, the central support portion 2B is also formed in a shape with a curved unevenness in which the portion that receives the center of the back of the seated occupant is gently recessed into the rear side from the portion that receives the lower waist portion P. ing. Therefore, in order to stretch the above-mentioned skin material in a state of adhering to the pad of the seat back 2 having such an undulating shape without causing floating or wrinkles, various parts of the skin material are provided. The part is suspended and fixed in each of the suspending grooves that are recessed in the form of stripes formed vertically and horizontally on the pad.

  Specifically, the skin material has a structure in which a plurality of cloth materials are joined together, and when the skin material is put on a pad, the seam between the cloth material and the cloth material is formed. The stitching lines 2D1 and 2D2 are positioned along the shape of each of the hanging grooves that are recessed in the vertical and horizontal directions formed on the pad. And the said skin material is the said unevenness | corrugation, when each stitching | suture part (stitching line 2D1, 2D2) located on each suspension groove | channel of the said pad is each suspended and fixed in each suspension groove | channel. It is in a state where it is stretched in a state of being in close contact with the shape of the pad with a gap. In this way, the places where the above-mentioned skin material stitching lines 2D1, 2D2 appear are respectively suspended in the respective hanging grooves of the internal pads and the skin material is stitched into the stitching line 2D1. , 2D2 is formed in a shape drawn inside.

  Similarly, the seat cushion 3 is not shown, but a foamed urethane pad is placed on the upper surface of the internal frame frame so as to cover the entire frame frame from the upper side and the outer peripheral side. Further, a cloth skin material is further applied and stretched from the outside so as to cover the entire surface. The seat cushion 3 has a central portion in the seat width direction, which is configured as a central support portion 3A that supports the seat occupant's buttocks and thighs from below, and on both the left and right sides than the central support portion 3A. A side support portion 3B that swells upward and can support the thigh of a seated occupant from both outer sides is formed.

  Each side support portion 3B of the seat cushion 3 has a seating surface 3B1 (upper surface) to which the thighs of those seated occupants are applied, respectively, inward with respect to the seating surface 3A1 (upper surface) of the center support portion 3A. In this way, the thigh of the seated occupant is supported from the lower diagonally outer side. As described above, the seat cushion 3 is configured such that the side support portions 3B on the left and right sides protrude obliquely upward with respect to the center support portion 3A against which the thigh and buttocks of the seated occupant are pressed. It is formed in a bulging shape. Further, the central support portion 3A is also formed in a curved uneven shape in which the portion that receives the buttocks of the seated occupant is gently recessed in a lower shape than the portion that receives the front thigh. ing. For this reason, in order to stretch the above-described skin material in a state of adhering to the pad of the seat cushion 3 having such an undulating shape without causing floating or wrinkles, various portions of the skin material are provided. The part is suspended and fixed in each of the suspending grooves that are recessed in the form of stripes formed vertically and horizontally on the pad.

  Specifically, the skin material has a structure in which a plurality of cloth materials are joined together, and when the skin material is put on a pad, the seam between the cloth material and the cloth material is formed. The stitching lines 3C1 and 3C2 are positioned along the shape of each hanging groove that is formed in a streak pattern in the vertical and horizontal directions formed on the pad. And the said skin material is the said unevenness | corrugation, when each stitching | suture part (stitching line 3C1, 3C2) located on each suspension groove | channel of the said pad is suspended and fixed in each suspension groove | channel, respectively. It is in a state where it is stretched in a state of being in close contact with the shape of the pad with a gap. In this way, the places where the above-mentioned skin material stitching lines 3C1 and 3C2 appear are respectively in a state of being suspended and fastened in the respective hanging grooves of the internal pads, and the skin material is stitched into the stitching line 3C1. , 3C2 is formed in a shape drawn into the inside.

  The above-described two stitching lines 2D2 appearing on the surface of the seat back 2 and the two stitching lines 3C2 appearing on the surface of the seat cushion 3 are expressed as if they are connected to each other. Thus, the positions in the sheet width direction of the boundary portions are aligned. Thereby, the seat back 2 and the seat cushion 3 are expressed as if the central support portions 2B and 3A and the side support portions 2C and 3B, which are functionally unified with each other, are partitioned into the same shape. It is in a state of being formed into a good-looking design that can feel functional beauty.

  Therefore, even when the support device 10 is attached to the boundary portion between the seat back 2 and the seat cushion 3, the support device 10 is also placed on the surface of the seat back 2 so that the functional beauty is not impaired. Two suture lines 13 extending in the vertical direction formed by suspending the skin material inside the pad are formed at positions overlapping the two vertical suture lines 2D2. Specifically, these two stitching lines 13 are inserted along a boundary portion between the central support portion 11 of the support tool 10 and the side support portions 12 on the left and right sides thereof. These two stitching lines 13 are formed such that their lower ends are aligned with the two vertical stitching lines 3C2 formed in the seat cushion 3 in the width direction.

  By the way, the shape of each side support portion 2C of the seat back 2 described above is such that the shoulder support portion 2Ca that supports the vicinity of the shoulder portion of the seated occupant and the intermediate portion 2Cc that supports the vicinity of the waist portion P of the seated occupant are respectively on the front outer side. The side support portions 2Cb located between them are in a shape that has a concave shape with a shorter projecting length. On the other hand, the shape of each side support part 3C of the seat cushion 3 is, in contrast to the shape of the seat back 2, the front part 3Ba that supports the vicinity of the knee part of the seated occupant and the rear part 3Bc that supports the vicinity of the waist part P of the seated occupant. And the thigh support part 3Bb for supporting the vicinity of the thigh of the seated occupant located between the upper and outer sides protrudes obliquely from the upper side to the upper side. It becomes the shape that became the shape. As described above, the seat back 2 and the seat cushion 3 have a contrasting shape in which the projecting shapes of the seat back 2 and the seat cushion 3 are staggered, so that the seat back 2 can be folded into the upper surface of the seat cushion 3 small. ing.

  More specifically, when the seat back 2 is folded on the upper surface of the seat cushion 3 because the seat back 2 and the seat cushion 3 protrude in a contrasting manner as described above. The shape of each side support portion 2C of the seat back 2 and the shape of each side support portion 3B of the seat cushion 3 can be made to coincide with each other, and the seat back 2 can be folded into a smaller size on the upper surface portion of the seat cushion 3. is there. Specifically, when the seat back 2 is folded on the upper surface portion of the seat cushion 3, each shoulder support portion 2Ca of each side support portion 2C of the seat back 2 becomes each front portion of each side support portion 3B of the seat cushion 3. 3B, the side support portions 2Cb of the side support portions 2C of the seat back 2 match the shapes of the thigh support portions 3Bb of the side support portions 3B of the seat cushion 3, and the side support portions 2C of the seat back 2 Each of the intermediate portions 2Cc matches the shape of each rear portion 3Bc of each side support portion 3B of the seat cushion 3. In this way, each side support portion 2C of the seat back 2 and each side support portion 3B of the seat cushion 3 can be folded in a compact manner while having a large swollen shape in the necessary portions, It has an excellent configuration for both the storage function.

  With respect to each side support portion 2C of the seat back 2 described above, each side support portion 12 of the support device 10 has a lower region than the most bulging portion in the intermediate portion 2Cc of each side support portion 2C, that is, the front side. The protrusion length is provided so as to be applied to a portion where the protrusion length gradually decreases. As described above, each side support portion 12 of the support tool 10 is provided so as to hang over a region that avoids the portion with the largest bulge in each side support portion 2C, thereby projecting the intermediate portion 2Cc of each side support portion 2C. Without excessively increasing the shape, it is possible to satisfactorily supplement the support function of the lower portion where the support function of each side support portion 2C becomes weak.

  Specifically, each side support portion 12 of the support device 10 is formed in an inclined shape so that the upper surface 12B of the support device 10 is gently lowered toward both outer sides. As a result, the upper and outer end portions of each side support portion 12 are not squared, and the upper and outer end portions are rolled up to the front side due to wrinkles on the internal pad and the shape due to long-term use. It has a shape that is less likely to cause problems such as scraping, and it has a structure that has excellent usability because it makes it difficult for the seated occupant's arm to hit the front side when it is used, so that it does not droop or float forward. It has become.

  Further, the support device 10 has two vertical stitches formed on the seat back 2 on which the upper surface 11B of the central support portion 11 and the upper surface 12B of each side support portion 12 are positioned. It forms in the shape extended diagonally toward back upper side so that it may form a mountain shape mutually toward the line 2D2. Thereby, the upper surface 11B of the center support part 11 of the said support tool 10 and the upper surface 12B of each side support part 12 are the backrest surface 2B1 of the center support part 2B of the seat back 2, and both the left and right side support parts 2C, respectively. It is formed in a shape extending diagonally toward the upper back side so as to be fitted toward each corner (suture line 2D2) recessed in a valley shape formed at the boundary with the backrest surface 2C1. It is supposed to be in a state.

  As a result, the support tool 10 is formed at each concave corner portion (stitching line 2D2) formed at the boundary between the backrest surface 2B1 of the central support portion 2B of the seat back 2 and the backrest surface 2C1 of the left and right side support portions 2C. ), The support surfaces 11A and 12A of the support device 10 and the backrest surfaces 2B1 and 2C1 of the seat back 2 can be provided in a smoothly connected state. As a result, the support device 10 can be provided in a state in which a good sense of unity with the seat back 2 can be obtained and a continuous support feeling without a step between the seat back 2 can be obtained.

  Further, as described above, the upper surface 11B of the central support portion 11 is inclined from the center toward both outer sides as the upper surface 11B of the central support portion 11 is inclined upward toward both outer sides. In order to smoothly connect the shapes that are inclined upward, the entire surface is smoothly curved in a concave shape. As a result, the support 10 is configured such that the support by the center support portion 11 is gradually spread from the outer side to the center from the upper side to the lower side, and is supported by the seat back 2. The support force is not changed suddenly at the portion where the support tool 10 changes to support. Further, the support device 10 is configured such that the support by the side support portions 12 is gradually spread from the rear side to the front side from the upper side to the lower side, and is supported by the seat back 2. The support force is not changed suddenly at the portion where the support tool 10 changes to support.

  Thus, the support tool 10 of the present embodiment is formed such that each side support surface 12A is inclined forward with respect to the center support surface 11A, so that the center support surface 11A is also used by the seat occupant. In addition to being able to support the waist P from the rear side, each side support surface 12A also has a side support function that can support the waist P of the seated occupant from both outsides. Specifically, each side support 12 is provided in a state of being supported from the back side by the backrest surface 2C1 of the left and right side support portions 2C of the seat back 2, so that each seat support surface 12A allows the seat P It has a strong side support structure. As described above, the support device 10 of the present embodiment can favorably support the waist portion P of the seated occupant.

  Further, the support device 10 includes a back surface 12D and a bottom surface 12C of each side support portion 12, and a shape of the backrest surface 2C1 of each side support portion 2C of the seat back 2 and each side support portion 3B of the seat cushion 3 respectively. By being curved so as to match the shape of the swelled seating surface 3B1, the seatback 2 and the seat cushion 3 are securely positioned in the width direction. Further, the support device 10 has a structure in which an insertion plate 14 extending from the back surface thereof is inserted and attached to the gap 4 between the seat back 2 and the seat cushion 3, so that the support device 10 is attached to the seat back 2 and the seat cushion 3. Therefore, it can be held in a stable state so that it does not flutter in the height direction or the front-rear direction.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, in the above-mentioned embodiment, the specific cloth types of the skin material used for the seat back 2, the seat cushion 3, and the support tool 10 have not been described. In addition to a configuration in which a plurality of sheets are connected, a plurality of types of cloth materials may be connected to each other. Further, the skin material used for the “support tool” of the present invention may be made of artificial leather (synthetic leather or artificial leather) or genuine leather in addition to the cloth material.

  Moreover, in the said Example, the support tool 10 is set as the structure provided with the cushion structure and skin structure similar to the seat back 2, and the state which has a continuous feeling with the seat back 2 also in appearance and the backrest sense. However, the “support device” of the present invention may be configured to have a cushioning property that is harder or softer than the seat back. By adjusting the hardness, it is possible to strengthen or weaken the support of the waist of the seated occupant. In addition, the “support tool” of the present invention is such that the shape of the central support part and each side support part is thicker than that shown in the above embodiment (the protrusion to the front side is increased), or It may be thin (thin with a small protrusion to the front side). By adjusting the thickness, the support of the seated occupant's waist can be strengthened or weakened. In addition, when the sitting occupant's sitting posture is a bad posture in which the waist is lifted forward from the seat back, the support of the waist can be performed satisfactorily by applying a thick support tool. . Further, the skin material used in the “support tool” of the present invention may be constituted by a different type of skin material from the skin material used for the seat back or the seat cushion.

  In addition, the “support device” of the present invention is applied to a seat back or a seat cushion that does not have a side support function, thereby supporting the occupant's lumbar region from both outsides in the portion to which the support device is applied. It can be set as the structure which can do. Specifically, the `` support tool '' of the present invention is `` a central support part that receives the support from the back side by the backrest surface in the center in the width direction of the seat back and supports the waist of the seated occupant from the back side '', And `` side support portions that are formed on the left and right sides of the central support portion and receive the support from the back side by the backrest surfaces of the left and right sides of the seat back, and support the waist of the seated occupant '', The side support parts are located on the front side so that each side support surface to which the seat occupant's lumbar part is assigned is inward of the center support surface to which the seat occupant's lumbar part is assigned. This support device is applied even if the seat back or seat cushion does not have a side support function because it is tilted and formed to support the waist of the seated occupant from both outsides. Part In, which it is assumed to be configured to be capable of supporting the seated occupant lumbar from both the outside.

  Further, the mounting structure of the “support device” of the present invention to the vehicle seat is not limited to the insertion structure using the insertion plate as shown in the above embodiment, and a rubber band provided on the support device is used as the seat back. Various attachment structures, such as a structure that is attached by hooking or passing, or a structure that is attached to a vehicle seat using a coupling structure such as a hook-and-loop fastener, can be adopted. In addition, the “support device” of the present invention can be used by detachably attaching to a boundary portion between the seat back and the seat cushion even in a configuration without a gap.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2A Headrest part 2B Center support part 2B1 Backrest surface 2Ba Lower part 2C Side support part 2C1 Backrest surface 2Ca Shoulder support part 2Cb Side support part 2Cc Middle part 2Cd Lower part 2D1 Sewing line 2D2 Sewing line (Concave corner) Part)
2F Ventilation hole 3 Seat cushion 3A Central support part 3A1 Seating surface 3Aa Rear part 3B Side support part 3B1 Seating surface 3Ba Front part 3Bb Thigh support part 3Bc Rear part 3C1 Suture line 3C2 Suture line 4 Gap 4A Space 4B Space 5B Reining space 5B Length adjustment lever 7 Shield 10 Support tool 11 Central support portion 11A Central support surface 11B Upper surface 11C Bottom surface 11D Rear surface 12 Side support portion 12A Side support surface 12B Upper surface 12C Bottom surface 12D Rear surface 13 Sewing line 14 Insertion plate P Waist portion

Claims (3)

A support device that is detachably attached to a boundary portion between a seat back and a seat cushion of a vehicle seat and supports a waist of a seated occupant,
A center support portion that receives support from the back side by the backrest surface at the center in the width direction of the seat back and supports the waist of the seated occupant from the back side;
A side support portion that is formed on the left and right sides of the central support portion, and that supports the waist of the seated occupant by receiving support from the back side by the backrest surfaces of the left and right sides of the seat back;
The respective side support portions are arranged such that each side support surface to which the seat occupant's lumbar portion is assigned is inward with respect to the center support surface to which the seat occupant's lumbar portion is assigned. A support device that is tilted forward and is formed to support the waist of a seated occupant from both outsides. The support device according to claim 1,
The seat back includes a side support part that supports the back part of the seated occupant from both outsides by tilting forward so that the backrest surfaces of the left and right sides are inward of each other with respect to the central backrest surface. Each of the side support portions protrudes forward from the intermediate portion in the height direction toward the lower portion in order to secure the tiltability of the seat back. The length is gradually shortened,
Each of the side support portions of the support device is provided so as to be applied to a portion of the seat back where the protrusion length toward the front side of each side support portion is gradually shortened. The support device according to claim 1 or 2,
The upper surface of the central support portion of the support device and the upper surface of the side support portions are respectively boundaries between the backrest surface at the center of the seat back and the backrest surfaces of the left and right sides where the boundary portions are positioned. A support device, wherein the support device is formed in a shape extending obliquely rearward and upward so as to form a mountain shape with each other so as to fit into a concave corner portion formed in the portion.

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