JP2013257287A - Human body dummy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a human body dummy to be used as a human body model of an occupant seated on a seat in various driving/performance tests of a vehicle, having a new lumbar part configured to reproduce a desired motion of lumbar and dynamic characteristics and to reduce the number of components and frequency of cleaning/maintenance, while facilitating change/adjustment of characteristics.SOLUTION: A human body dummy has a lumbar part 20 that connects a chest part 22 with pelvis part 24. The lumbar part includes a leaf spring. A surface of the leaf spring faces a back and forth direction. An upper end of the leaf spring is fixed to the chest part, and a lower end of the leaf spring is fixed to the pelvis part.

Description

  The present invention relates to a human body dummy doll or a human body mannequin doll used as a human body model of an occupant seated in a seat in various running and performance tests of a vehicle, and more particularly, to a lumbar structure of a human body dummy doll. Related.

  In running and performance tests such as vehicle collision tests such as automobiles, a human dummy doll or human body mannequin doll (hereinafter referred to as a human body manikin doll) that reproduces the dynamic characteristics of the human body in order to evaluate the impact on the human body of passengers seated in the seat , Referred to as “human body dummy”). In such a human body dummy, various configurations have been proposed so that the motion of the human body skeleton, particularly the vertebral column structure from the cervical vertebra to the lumbar vertebra, can be reproduced so that the whipping phenomenon at the time of vehicle collision can be reproduced. For example, in Patent Document 1, a plurality of blocks corresponding to the bones of each joint of the lumbar spine can be rotated with each other by a joint and a spring member in order to imitate the movement and mechanical characteristics of the joint of the lumbar spine. In addition, a configuration has been proposed in which the positions of the joints on the block can be changed so that the joint movement and mechanical characteristics can be adjusted.

Japanese Utility Model Sho 62-187830

  In the human body dummy as described above, if dust or moisture enters the joint or link that connects the blocks imitating the bones of each joint of the lumbar vertebrae, the movement between the joints becomes dull and the planned movement or The mechanical properties may not be reproduced. Therefore, it is necessary to frequently clean and maintain the human body dummy block, joint or link. Also, when trying to change the characteristics of the bone and joint, it is necessary to inspect and adjust all the components, but because the structure is complex and relatively heavy, even if the total weight can be adjusted, Adjustment of the position of the center of gravity is very difficult and labor is required. Furthermore, the number of parts is large, and manufacturing and adjustment are relatively expensive.

  Thus, one object of the present invention is that the above-described human body dummy can reproduce the desired movement and mechanical characteristics of the lumbar vertebrae, and has a smaller number of parts than before, and cleaning and maintenance. It is an object to provide a novel lumbar configuration that makes it easier to change and adjust characteristics.

  According to the present invention, the above-mentioned problem is a human body dummy having a lumbar portion that connects the rib cage portion and the pelvis portion, the lumbar portion includes a leaf spring, and the surface of the leaf spring is directed in the front-rear direction, This is achieved by a human body dummy characterized in that the upper end of the spring is fixed to the rib cage and the lower end of the leaf spring is fixed to the pelvis.

  In the above configuration, the lumbar vertebra part extending by connecting a plurality of lumbar vertebrae between the thoracic part and the pelvis part is regarded as a continuous elastic body, and conventionally configured by connecting the blocks in the vertical direction. The lumbar portion of the human body dummy is replaced with a beam that mimics the mechanical characteristics of the actual lumbar portion, that is, a leaf spring that has both sides directed in the front-rear direction and can be bent in the front-rear direction. Further, in order to imitate the shape and characteristics of the lumbar vertebra of the human body, the bending direction (bending mode) of the leaf spring of the lumbar vertebra may be determined by the forward and backward inclinations of the thorax and pelvis. For example, when the spinal column is upright, the rib cage part extends in the vertical direction and the pelvis part is tilted forward. May be curved. When the spinal column is tilted forward, the thoracic portion is tilted forward and the pelvis is tilted backward, so that the lumbar portion may be curved in a direction in which the intermediate portion protrudes behind the human body dummy. . In order to achieve such a bending mode of the leaf spring, preferably, the upper end is fixed to the lower end of the rib cage so that the leaf spring extends in a direction inclined from the lower edge of the rib cage toward the front of the human body dummy. At the part, the lower end is fixed so that the leaf spring extends substantially vertically from the upper surface of the pelvis part.

  Thus, according to the above configuration, since the lumbar portion is formed by a single leaf spring-like beam, the phenomenon that the movement due to intrusion of dust, moisture, etc. does not occur does not occur, and the configuration is simpler. Therefore, the frequency and labor of cleaning / maintenance are reduced. Further, when changing or adjusting the characteristics, it is only necessary to replace the leaf spring-shaped beam with one having the desired characteristics, and the labor at that time is expected to be greatly reduced.

  Other objects and advantages of the present invention will become apparent from the following description of preferred embodiments of the present invention.

FIG. 1A is a schematic side view of the skeleton of the lumbar portion of an actual human body. FIG. 1B is a perspective view of a lumbar part model simulating a lumbar part according to the present invention with a leaf spring. FIG. 2A is a schematic side view of a human body dummy with a spine upright according to the present invention. FIG. 2 (B) is a schematic side view of a human body dummy with the spinal column tilted forward according to the present invention. FIG. 3 is a diagram schematically showing the fixed state of the upper and lower ends of the lumbar portion according to the present invention.

DESCRIPTION OF SYMBOLS 10 ... Lumbar skeleton of human body 12 ... Lumbar vertebra 14 ... Lumbar vertebra joint 20 ... Lumbar vertebra part composed of leaf spring (beam) 22 ... Thoracic part 24 ... Pelvic part 26 ... Thigh part 28 ... Head 30 ... Fixed part of leaf spring

  The present invention will now be described in detail with reference to a few preferred embodiments with reference to the accompanying drawings. In the figure, the same reference numerals indicate the same parts.

  Referring to FIG. 1A, in the skeleton of the lumbar portion 10 of the actual human body, as is well known, a plurality of lumbar vertebrae 12 are connected via an intervertebral disc 14 and extend in a generally longitudinal direction. Yes. In such a lumbar part, since the intervertebral disc 14 is cartilage tissue, it becomes a cushion between the lumbar vertebrae 12, and the lumbar part is curved in the front-rear direction depending on the posture of the human body. In the lumbar vertebra part of a conventional human body dummy, a plurality of block members corresponding to the lumbar vertebra 12 are mechanically connected in order, imitating the skeletal structure as shown in FIG. A string-wound spring member or the like that imitates an elastic characteristic (a spring characteristic with S in the drawing) is interposed.

  However, in the case of the lumbar part of the conventional human body dummy that is modeled after the skeleton structure of the actual lumbar part, there are many mechanical connection structures, and if dust or moisture enters the connection structure during use, May slow down and the planned mechanical properties may not be fully exerted. In order to prevent such a problem, it is necessary to frequently perform cleaning and maintenance. However, since the number of component parts is large, considerable labor is required. Also, when changing the mechanical characteristics of the lumbar portion, adjustment is difficult because the number of component parts is large, the structure is complicated, and the weight is relatively large. In general, even if the total weight can be adjusted, it is difficult to adjust the position of the center of gravity.

  Therefore, in the present invention, the skeletal structure as shown in FIG. 1 (A) is modeled as a continuous elastic body having a spring characteristic S and is schematically depicted in FIG. 1 (B) as a lumbar portion of a human body dummy. As shown, a leaf spring-like beam 20 that mimics the mechanical characteristics of an actual lumbar portion is employed. Such a leaf spring-like beam 20 may be an arbitrary member that can be elastically bent, such as a metal plate. Further, in the beam 20, both sides of the leaf spring are directed in the front-rear direction of the human body dummy, and the upper end and the lower end of the leaf spring are rigidly attached to the lower surface of the rib cage portion 22 and the upper surface of the pelvis portion 24, respectively. Fixed. Thus, when the relative position and orientation of the rib cage portion 22 and the pelvis portion 24 change, the leaf spring-like beam 20 is bent in the front-rear direction of the human body dummy.

  In the beam 20 of the lumbar portion of the human body dummy, the bending state, that is, the bending mode, may be determined by the inclination of the rib cage portion 22 and the pelvis portion 24. Referring to FIG. 2 (A), when the human body is in an upright posture, usually, the lumbar portion is between the thoracic portion 22 in an upright state and the pelvic portion 24 whose upper surface is inclined forward in the direction of arrow α. In order to support the center of gravity G of the thorax 22 and the head 28, the substantially central region is curved in a direction protruding toward the front side of the human body. Therefore, similarly, when the human body dummy is in an upright state, the beam 20 may be adjusted so that the substantially central region is curved in a direction protruding in the direction of the arrow a. On the other hand, as schematically illustrated in FIG. 2B, in the actual human body, the upper surface of the pelvis portion 24 is in a state where the rib cage portion 22 and the head portion 28 are tilted forward in the direction of the arrow β. The lumbar portion is tilted backward in the direction of the arrow γ, and the lumbar portion is curved in a direction in which a substantially central region protrudes to the rear side of the human body. Therefore, in the human body dummy, in the state where the rib cage portion 22 and the head portion 28 are tilted forward in the direction of arrow β and the upper surface of the pelvis portion 24 is tilted backward in the direction of arrow γ, the beam 20 also has a substantially central region. You may adjust so that it may curve in the direction which protrudes in the direction of arrow b.

  The upper and lower ends of the beam 20 are shown in FIG. 3 so as to change the bending direction of the beam 20 corresponding to the forward or backward tilted state of the rib cage portion 22 and the pelvis portion 24 as described above. As shown, the lower surface of the rib cage portion 22 and the upper surface of the pelvis portion 24 may be rigidly fixed by a fixing device 30 such as a bolt and a nut. At this time, preferably, the beam 20 is protruded from the lower surface of the rib portion 22 to the vertical direction of the lower surface so that the beam 20 protrudes forward of the human body dummy with the rib portion 22 standing upright. The upper end of the beam 20 is fixed so as to extend in a direction inclined forward at an angle θ. On the other hand, since the upper surface of the pelvis part 24 is inclined forward in the upright state of the rib cage part 22, the lower end of the beam 20 may be fixed so as to extend in a direction substantially perpendicular to the upper surface of the pelvis part 24. . The extending direction of the beam 20 on the lower surface of the rib cage portion 22 and the upper surface of the pelvis portion 24 is not limited to the above example, and may be directed in an arbitrary direction.

  Thus, in the above-described present invention, the lumbar vertebra portion alternately connected to the plurality of lumbar vertebrae and the intervertebral disc is approximated by a leaf spring, thereby reducing the number of parts, thereby reducing the gap between the parts. The number is reduced and the labor of cleaning and maintenance is reduced. The mechanical properties of the lumbar part can be changed and adjusted by replacing the leaf spring with a desired characteristic, or by extending the beam 20 on the lower surface of the thorax 22 and the upper surface of the pelvis 24. This may be achieved by adjusting to an arbitrary direction. Since the number of parts whose positions are to be adjusted is small, a reduction in labor required for changing and adjusting the mechanical characteristics is expected.

  Although the above description has been made in relation to the embodiment of the present invention, many modifications and changes can be easily made by those skilled in the art, and the present invention is limited to the embodiment exemplified above. It will be apparent that the invention is not limited and applies to various devices without departing from the inventive concept.

Claims (1)

  A human body dummy having a lumbar part connecting the rib cage part and the pelvis part, wherein the lumbar part includes a leaf spring, a surface of the leaf spring is directed in the front-rear direction, and an upper end of the leaf spring is fixed to the rib cage portion And a lower end of the leaf spring is fixed to the pelvis.

Images