JP2007131990A - Human body protecting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a human body protecting tool 2 excellent in feeling of wear, and capable of preventing cervical fracture of femur. <P>SOLUTION: This human body protecting tool 2 includes a buffer 4 and an attachment body 6. The buffer 4 is attached to the attachment body 6 so as to cover an area where the greater trochanter possibly moves. The longitudinal direction of the buffer 4 is inclined up in front. An angle which the longitudinal direction of the buffer 4 makes to a perpendicular line is 23-90°. The length of the longitudinal direction of the buffer 4 is 130-300 mm, and the length of the width direction of the buffer 4 is 90-200 mm. The human body protecting tool 2 is excellent in feeling of wear and can prevent cervical fracture of femur. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a human body protection tool that reduces the impact on a human during a fall.

  Along with the increase in the elderly population, the number of accidents in which this elderly person falls and breaks is increasing. In particular, femoral neck fractures tend to increase. Complete healing of a femoral neck fracture takes time. In some cases, femoral neck fractures can lead to bedridden. The femoral neck fracture is becoming a major social problem, and its prevention is strongly demanded.

  The femoral neck fracture is considered to occur because the greater trochanter of the femur is struck against the ground or the like during a fall. Therefore, various protective devices have been proposed in order to prevent this femoral neck fracture.

  Japanese Patent Laid-Open No. 9-508824 discloses a hip protector having a dome-shaped member having a concave side face inward so as to meet a body shape around a human femoral neck. The entire surface of the hip protector is made of a rigid foamed thermoplastic material and is formed as a dome-shaped hard shell.

  Japanese Patent Application Laid-Open No. 9-268409 discloses a garment in which a shock absorbing pad is used to protect a fracture caused by a fall or a collision. This acrylic copolymer foam is used as a shock absorbing pad in this fracture protection garment.

  Japanese Patent Application Laid-Open No. 2003-3004 discloses a garment with a shock absorbing pad that protects against bruises, lacerations, fractures, and the like due to falls and collisions. This shock absorbing pad is designed with safety in contact with the body surface.

JP 9-508824 gazette JP-A-9-268409 JP 2003-3004 A

  In the human body protection device described in the above publication, a shock absorber such as a hip protector and a shock absorbing pad is attached so as to cover the greater trochanter in a standing position. Nevertheless, there is a problem that a femoral neck fracture occurs.

  Since the occurrence of femoral neck fracture is suppressed, if the region covered with the buffer body is expanded, the uncomfortable feeling at the time of wearing the human body protection device increases. The use of such a human body protection device is avoided.

  An object of the present invention is to provide a human body protection device that has an excellent wearing feeling and can prevent a femoral neck fracture.

  The human body protection tool according to the present invention includes a buffer body and a mounting body. This buffer is attached to the mounting body so as to cover an area where the greater trochanter can move. The longitudinal direction of the shock absorber is inclined upward.

  Preferably, the angle formed by the longitudinal direction of the buffer with respect to the vertical line is not less than 23 ° and less than 90 °. Preferably, this angle is not less than 50 ° and less than 90 °.

  Preferably, the length of the buffer body in the longitudinal direction is 130 mm or more and 300 mm or less. Preferably, the length of the buffer body in the width direction is not less than 90 mm and not more than 200 mm.

  Another human body protection tool according to the present invention includes a buffer and a mounting body. This buffer is attached to the mounting body so as to cover an area where the greater trochanter can move. The principal axis of the minimum second moment of the projection surface of the shock absorber is inclined upward.

  Preferably, the angle formed by the main axis with respect to the vertical line is not less than 23 ° and less than 90 °. Preferably, this angle is not less than 50 ° and less than 90 °.

  The inventors have clarified a region where the greater trochanter can move in the process of changing posture from standing to falling. In this human body protection device, the shock absorber reliably covers the region where the greater trochanter can move, so that femoral neck fracture can be prevented. Since this shock absorber moderately covers the region where the greater trochanter can move, the human body protection device provided with this shock absorber is excellent in the feeling of wearing without covering even the unnecessary portions.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a side view showing a human body protection tool 2 according to an embodiment of the present invention. In FIG. 1, the human body protection tool 2 is folded in a state in which a side surface located on the side is turned up when worn on a human. In FIG. 1, the left side is the front side of the human body. The human body protection tool 2 includes a buffer body 4 and a mounting body 6. The mounting body 6 includes a storage chamber 8. The buffer body 4 is accommodated in the accommodation chamber 8. In FIG. 1, a point PA is a portion corresponding to the greater trochanter. This point PA corresponds to the position of the human greater trochanter in the standing position. The position of the greater trochanter is confirmed by palpation. A solid line LA is a vertical line passing through the point PA. In this specification, the hip joint intermediate position (0 ° in bending and extension) in the standing position is expressed as the standing position.

  The mounting body 6 is substantially clothing. Examples of clothing include trousers, sweatpants, and belts. In the human body protection tool 2, the mounting body 6 is shorts.

  The storage chamber 8 is sewn to the front side of the mounting body 6 with a thread. This accommodation chamber 8 has a pocket shape. The buffer body 4 is inserted from the insertion port 10 of the storage chamber 8. Since the position of the storage chamber 8 is fixed, the position of the buffer body 4 does not shift. The storage chamber 8 may be sewn on the back side of the mounting body 6. The configuration of the storage chamber 8 such as shape, size, mounting position, and the like is appropriately determined in consideration of the specifications of the human body protection tool 2. Note that fasteners such as fasteners, hook-and-loop fasteners, buttons and the like may be used for joining the accommodation chamber 8 to the mounting body 6. The buffer body 4 may be directly attached to the mounting body 6 using fasteners such as fasteners, hook-and-loop fasteners, and buttons.

  A flap 12 is attached to the insertion port 10 of the storage chamber 8. The buffer body 4 accommodated in the storage chamber 8 does not unexpectedly go out of the storage chamber 8. A fastener such as a fastener, a hook-and-loop fastener, or a button may be used for the insertion port 10.

  The buffer body 4 is a polymer molded body having bubbles therein. The planar shape of the buffer 4 is substantially rectangular. The longitudinal direction of the buffer body 4 is inclined upward. Since the buffer body 4 has flexibility, the human body protection tool 2 can be mounted in conformity with the shape of the body. An air cushion may be used for the buffer body 4.

  FIG. 2 is a rear view showing a state in which the human body protection device 2 of FIG. In FIG. 2, the human 14 and the human body protection device 2 are shown. As shown in FIG. 2, the shock absorber 4 is located in a range from the hip 16 to the buttocks 18 of the human 14.

  FIG. 3 is a cross-sectional view taken along line III-III in FIG. In this figure, a cross section of the human 14 and the human body protection device 2 are shown. In this cross-sectional view, the position of the buffer body 4 in the horizontal plane of the human 14 is shown. The cross section of the human 14 shown in this figure shows the greater trochanter 20 and the sciatic bone 22 among images obtained by observation of the human 14 in an upright position using an X-ray computed tomography apparatus. In FIG. 3, among the straight lines passing through the position of the greater trochanter leading edge 24, the intersection of the body surface 26 with the straight line LB that intersects the body surface 26 perpendicularly is a portion 28 corresponding to the greater trochanter leading edge. is there. Of the straight lines passing through the tip 30 of the sciatica 22, the intersection of the body surface 26 with the straight line LC that intersects the body surface 26 perpendicularly is a sciatic equivalent portion 32. As shown in FIG. 3, the buffer body 4 is positioned so as to cover a range from the greater trochanter leading edge equivalent portion 28 to the ischial equivalent portion 32.

  The present inventors examined the relationship between the bruised site at the time of an elderly person's fall and its frequency. The inventors estimated the relationship between this bruised site and its frequency from the observation of falls of three infants who started virgin walking. This infant is similar to the elderly in walking style and muscle strength distribution. The present inventors photographed the natural fall process of these three infants with a video camera from four directions, front, back, left, and right, and obtained the relationship between the bruised site and the frequency at the time of the fall from the taken fall posture. . Of the confirmed falls, posterior and lateral falls that could cause femoral neck fractures accounted for 58.5% of the total number of falls. As a breakdown of the bruises of this rearward and lateral fall, the median direction (sacral portion corresponding portion 34 in the standing position) is 12.0%, the rear side (from the greater trochanter corresponding portion PA in the standing position) The area reaching the sciatic bone equivalent portion 32) was 42.8%, and the outside (the greater trochanter equivalent portion PA in the standing position) was 3.7%. From this result, in the natural fall process, it was clarified that the fall to the rear side is the fall mode with the highest occurrence frequency. It was also confirmed that the hip joint was in an external flexion position during this rearward fall. As described above, in the human body protection tool 2, the shock absorber 4 is positioned so as to cover the range from the greater trochanter leading edge equivalent portion 28 to the ischial equivalent portion 32. For this reason, the shock absorber 4 absorbs the impact on the greater trochanter 20 in the fall of the rear side with the highest occurrence frequency. This human body protection tool 2 prevents a femoral neck fracture caused by a fall.

  The present inventors also examined the relationship between the posture of the human 14 and the position of the greater trochanter 20. The relationship between the posture of the human 14 and the position of the greater trochanter 20 was obtained by the following method. First, the human 14 wears pants configured to be in close contact with the body surface 26. Next, the position of the greater trochanter 20 of the human 14 in the standing position is confirmed by palpation from above the pants. Next, the confirmed position of the greater trochanter 20 is marked. Next, the posture of the human 14 is changed. The position of the greater trochanter 20 is confirmed and marked by palpation while the posture is changed from the standing position to the hip flexion 120 ° and the external rotation 90 °. This operation is repeated every time the human 14 changes posture. In this way, the relationship between the posture of the human 14 and the position of the greater trochanter 20 was obtained. In FIG. 1, a region where the greater trochanter 20 confirmed on the body surface 26 by this examination can move is indicated by a two-dot chain line RA as a virtual region. As shown in the drawing, the longitudinal direction of the region RA in which the greater trochanter 20 can move is inclined upward.

  As shown in FIG. 1, in this human body protection device 2, the buffer 4 reliably covers the region RA in which the greater trochanter 20 can move. In such a human body protection device 2, the shock absorber 4 absorbs the impact on the greater trochanter 20 in any fall mode. This human body protection tool 2 prevents a femoral neck fracture. In this human body protection tool 2, since the buffer 4 appropriately covers the region RA in which the greater trochanter 20 can move, the uncomfortable feeling at the time of wearing can be minimized. This human body protection tool 2 is excellent in wearing feeling.

  In FIG. 1, an alternate long and short dash line CL is a center line of the buffer body 4. This center line CL coincides with the principal axis of the minimum second moment of the projection surface of the buffer 4 which will be described in detail later. The center line CL is parallel to the longitudinal direction of the buffer body 4. In the human body protection tool 2, the center line CL passes through the point PA. A point PB is an upper intersection of the center line CL and the buffer body 4. The angle α represents an angle formed by the center line CL with respect to the vertical line LA. A double arrow line L1 is the length of the buffer body 4 in the longitudinal direction. A double arrow line L2 is the length of the buffer body 4 in the width direction. The double arrow line L3 is the length in the longitudinal direction between the point PA and the point PB.

  The present inventors marked the position of the greater trochanter 20 of three adult men on one pant. And area | region RA was calculated | required. The angle α was 33 °. The inventors have marked the position of the greater trochanter 20 of the other 12 adult men on other pants. And area | region RA was calculated | required. The angle α was 67 °. The inventors further marked the position of the greater trochanter 20 of nine adult women on other pants. And area | region RA was calculated | required. The angle α was 81 °. When the marking positions of three pants were overlapped, it was found that the preferable angle α was 23 ° or more and less than 90 °. By setting the angle α within this range, the buffer body 4 effectively covers an area where the greater trochanter 20 can move. The angle α may be set for each person who wears the human body protection tool 2. However, in this case, a large number of product groups need to be prepared, which is uneconomical. If the angle α is set to 23 ° or more and less than 90 °, one human body protection device 2 can be adapted to a large number of people. This human body protection tool 2 is excellent in versatility. The angle α is more preferably 50 ° or more, and particularly preferably 60 ° or more. The angle α is more preferably 85 ° or less.

  In this human body protection tool 2, the length L1 is 130 mm or more and 300 mm or less. By setting the length L1 to be equal to or greater than 130 mm, the buffer body 4 reliably covers an area where the greater trochanter 20 can move. This human body protection tool 2 prevents a femoral neck fracture. In this respect, the length L1 is more preferably equal to or greater than 150 mm, and particularly preferably equal to or greater than 170 mm. By setting the length L1 to 300 mm or less, a sense of incongruity at the time of wearing can be suppressed. This human body protection tool 2 is excellent in wearing feeling. In this respect, the length L1 is more preferably equal to or less than 250 mm, and particularly preferably equal to or less than 210 mm.

  In this human body protection tool 2, the length L2 is 90 mm or more and 200 mm or less. By setting the length L2 to 90 mm or more, the buffer body 4 reliably covers an area where the greater trochanter 20 can move. This human body protection tool 2 prevents a femoral neck fracture. In this respect, the length L2 is more preferably equal to or greater than 100 mm, and particularly preferably equal to or greater than 110 mm. By setting the length L2 to 200 mm or less, a sense of incongruity at the time of wearing can be suppressed. This human body protection tool 2 is excellent in wearing feeling. In this respect, the length L2 is more preferably equal to or less than 180 mm, and particularly preferably equal to or less than 160 mm.

  In the human body protecting device 2, the ratio of the length L3 to the length L1 (L3 / L1) is preferably 0.10 or more and 0.60 or less. By setting this ratio (L3 / L1) to be 0.10 or more, the buffer 4 reliably covers an area where the greater trochanter 20 can move. This human body protection tool 2 prevents a femoral neck fracture. In this respect, the ratio (L3 / L1) is more preferably equal to or greater than 0.15, and particularly preferably equal to or greater than 0.25. By setting this ratio (L3 / L1) to 0.60 or less, a sense of incongruity at the time of wearing can be suppressed. This human body protection tool 2 is excellent in wearing feeling. In this respect, the ratio (L3 / L1) is more preferably equal to or less than 0.55, and particularly preferably equal to or less than 0.45. In addition, the preferable range of this length L3 is 30 mm or more and 150 mm or less.

  In the human body protection tool 2, a synthetic resin or rubber is used as the base polymer of the buffer body 4. Examples of the material of the synthetic resin include polyurethane, polyester, polyolefin, polystyrene, polyvinyl chloride, ethylene-vinyl acetate copolymer, silicone, and various thermoplastic elastomers. Examples of the rubber material include natural rubber, polyisoprene, polybutadiene, butadiene-styrene copolymer, acrylonitrile-butadiene copolymer, and ethylene-propylene-diene copolymer. From the viewpoint of processability, polyurethane is preferred. Either ester-based polyurethane or ether-based polyurethane can be used, but ether-based polyurethane having excellent shape restoring properties is more preferable.

  Bubbles inside the buffer 4 are obtained by chemical or physical treatment. Specific methods include a method using a volatile gas generated in the middle of a chemical reaction, a method using a foaming agent, a method of foaming during stirring, and the like. In the buffer 4, the bubbles may be independent bubbles. This bubble may be an open cell.

  FIG. 4 is a side view showing a human body protection tool 36 according to another embodiment of the present invention. In FIG. 4, the human body protection device 36 is folded in a state in which a side surface located on the side is turned up when the device is worn on a human. The human body protection tool 36 includes a buffer body 38 and a mounting body 40. The mounting body 40 includes a storage chamber 42. The buffer 38 is accommodated in the accommodation chamber 42. The human body protection tool 36 is the same as the human body protection tool 2 in FIG. 1 except for the shape of the buffer body 38 and the storage chamber 42. In FIG. 4, the point PA is a location corresponding to the greater trochanter. A solid line LA is a vertical line passing through the point PA. An alternate long and two short dashes line RA represents a region where the greater trochanter 20 obtained by the inventors' investigation can move.

  In this human body protection tool 36, the shape of the buffer 38 is an ellipse. An alternate long and short dash line ML is the principal axis of the minimum second moment of the projection surface of the buffer 38. The main axis ML passes through the point PA. In the human body protection tool 36, the main axis ML is inclined forwardly. The direction of the main axis is also the longitudinal direction of the buffer body 38. In FIG. 4, the angle β represents an angle formed by the main axis ML with respect to the vertical line LA. It should be noted that in the human body protection tool 36 in which the shape of the buffer body 38 is arbitrarily configured, the main axis ML may not pass through the point PA.

  The method for obtaining the main axis ML is as follows. First, the side surface of the human body protection tool 36 centered on the point PA is photographed. The contour of the buffer 38 in the captured side image matches the projection plane of the buffer 38. Next, the outline of the buffer 38 is read as a coordinate axis XY by a digitizer. Next, the region surrounded by the outline of the buffer body 38 is divided into about 200 minute squares. Next, vertex coordinates of this square are obtained. Next, the area of the kth quadrangle is Ak, the position vector of the center coordinate is rk = (Xk, Yk), and the position vector ra of the center of the contour of the buffer 38 is expressed by the following formula (I ).

  A second moment around the coordinate axis X′Y ′ parallel to the coordinate axis XY is calculated based on the following formulas (II) to (V).

  In the matrix of the following mathematical formula (VI) obtained by calculating the second moment, the eigenvector having a small eigenvalue is the principal axis ML of the minimum second moment.

  As shown in FIG. 4, in the human body protection tool 36, the buffer 38 reliably covers the region RA in which the greater trochanter 20 can move. Such a human body protection device 36 absorbs the shock to the greater trochanter 20 even if the shock absorber 38 is placed in any falling manner. This human body protection device 36 prevents femoral neck fractures in advance. In this human body protection device 36, the buffer 38 appropriately covers the region RA in which the greater trochanter 20 can move, so that the uncomfortable feeling at the time of wearing can be minimized. This human body protection tool 36 is excellent in a feeling of wearing.

  In the human body protection device 36, the angle β is preferably 23 ° or more and less than 90 °. When the angle β is set within this range, the buffer 38 covers an area where the greater trochanter 20 can effectively move. In this respect, the angle β is more preferably 50 ° or more, and particularly preferably 60 ° or more. This angle β is more preferably 85 ° or less.

FIG. 1 is a side view showing a human body protection device according to an embodiment of the present invention. FIG. 2 is a rear view showing a state in which the human body protection device of FIG. 1 is worn on a human. FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a side view showing a human body protection device according to another embodiment of the present invention.

Explanation of symbols

2, 36 ... Human body protection tool 4, 38 ... Buffer body 6, 40 ... Wearing body 8, 42 ... Storage chamber 10 ... Insertion port 12 ... Flap 14 ... Human 16 ··· Hip 18 ··· Hip 20 · · · Greater trochanter 22 · · · Sciatic bone 24 · · · Greater trochanteric leading edge 26 · · · Body surface 28 · · · Greater trochanteric leading edge portion 30 ··・ Tip 32 ... Sciatic bone equivalent 34 ... Sacral bone equivalent

Claims (8)

It has a shock absorber and a wearing body,
A human body protection tool that is attached to a mounting body in a state in which the longitudinal direction is inclined upward so that the buffer body covers an area where the greater trochanter can move.   The human body protection tool according to claim 1, wherein an angle formed by the longitudinal direction of the buffer body with respect to a vertical line is 23 ° or more and less than 90 °.   The human body protection tool according to claim 2, wherein an angle formed by the longitudinal direction of the buffer body with respect to a vertical line is 50 ° or more and less than 90 °.   The human body protection device according to any one of claims 1 to 3, wherein a length of the buffer body in a longitudinal direction is 130 mm or more and 300 mm or less.   The human body protection tool according to any one of claims 1 to 4, wherein a length of the buffer body in a width direction is not less than 90 mm and not more than 200 mm. It has a shock absorber and a wearing body,
A human body protection tool attached to the mounting body in a state in which the principal axis of the minimum second moment of the projection surface is tilted forward so that the buffer body covers an area where the greater trochanter can move.   The human body protection tool according to claim 6, wherein an angle formed by the main shaft with respect to a vertical line is 23 ° or more and less than 90 °.   The human body protection tool according to claim 7, wherein an angle formed by the main shaft with respect to a vertical line is 50 ° or more and less than 90 °.

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