JP2012122600A - Shock relaxing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock relaxing structure capable of exhibiting high shock absorbing performance even when no sufficient crushable zone is secured.SOLUTION: An inner spherical body 18 is movably disposed in an outer spherical body 16. When shock force is applied to a vehicle 10 to release the connection state of the inner spherical body 18 and the outer spherical body 16, the inner spherical body 18 is moved by inertial force. Accordingly, shock energy generated by the shock force is converted into at least kinetic energy, and the shock energy is absorbed. Since the outer spherical body 16 and the inner spherical body 18 have spherical shapes, when the shock force is applied to the vehicle 10, the inner spherical body 18 circularly moves along the shape of the outer spherical body 16. Thus, the shock energy generated by the shock force applied to the outer spherical body 16 is converted into the kinetic energy and potential energy. Thus, the shock energy is effectively absorbed, and higher shock absorbing performance is demonstrated compared to the conventional art.

Description

  The present invention relates to an impact mitigating structure for mitigating received impact.

  Conventional automobiles have a structure that absorbs an impact in the crushable zone, but there is a risk of receiving a large impact in a collision with a vehicle larger than the own vehicle. On the other hand, the invention described in Patent Document 1 discloses a vehicle body structure in which a vehicle body is manufactured from an elastic material and the shape of the vehicle body is made into a spherical shape to absorb an impact, and the vehicle body has a resilience and a pressure absorption property. It is designed to improve the shock absorption capacity of the vehicle body.

  On the other hand, in urban areas, traffic jams, insufficient parking spaces, and difficulty in parking have become problems. For this reason, although a small car seems to be effective, since it is small, it is vulnerable to collision with a large vehicle, and there is a problem in poor visibility when mixed with a large vehicle. On the other hand, the invention described in Patent Document 2 discloses a spherical vehicle body structure in which a lower platform has a circular shape and an upper portion is formed of a semi-spherical frame. Such a spherical vehicle body is small in size so that it is easy to park and does not take a place, and the center of gravity is stabilized and rollover can be prevented.

JP 2000-142509 A US Pat. No. 6,796,398

  However, in these vehicle body structures, there is a possibility that a crushable zone cannot be sufficiently secured in a frontal collision or a side collision with a vehicle larger than the own vehicle.

  This invention is made | formed in view of the said subject, Comprising: It aims at providing the impact mitigation structure which can exhibit high shock absorption performance, even when a crushable zone cannot fully be ensured.

  In order to solve the above-described problem, the impact relaxation structure according to claim 1 is provided so as to be movable within the outer member and the outer member, and when the impact force is applied to the outer member, the impact mitigating structure moves to cause impact energy. And at least an inner member that is converted to kinetic energy.

  The impact mitigating structure according to claim 1 has a double structure of an outer member and an inner member, and the inner member is movably provided in the outer member. When the impact force acts on the outer member, the inner member moves. Thereby, the impact energy by the said impact force is converted into a kinetic energy at least, and the impact force to an inner member is relieved. That is, the impact force on the inner member is reduced by the frictional resistance caused by the movement of the inner member. In the “inner member”, a cabin may be configured, or a storage may be configured.

  The impact relaxation structure according to claim 2 is the impact relaxation structure according to claim 1, wherein the outer member is an outer spherical body having a spherical shape, and the inner member is an inner spherical body having a spherical shape.

  In the impact mitigating structure according to claim 2, since the outer spherical body and the inner spherical body are spherical, when the impact force acts on the outer spherical body, the inner spherical body follows the shape of the outer spherical body inside the outer spherical body. Make a circular motion. When this circular motion is a movement along the height direction, the impact energy due to the impact force acting on the outer spherical body is converted into kinetic energy and potential energy, and the impact energy can be absorbed effectively. .

  That is, even if the impact is from any direction, the impact on the inner member can be reduced by the circular movement of the inner spherical body. Further, since the collision stroke can be secured by the circular motion of the inner spherical body, the impact energy can be effectively absorbed in a narrow space. In addition, when the outer spherical body falls, the outer spherical body forms a spherical shape, so that the outer spherical body rotates. At this time, the impact force acting on the outer spherical body can be reduced by frictional resistance with the ground. it can.

  The impact mitigating structure according to claim 3 is the impact mitigating structure according to claim 2, wherein the outer spherical body and the inner spherical body are coupled, and an impact force of a predetermined value or more acts on the outer spherical body. Then, the coupling | bond part which cancels | releases a coupling | bonding state is provided.

  In the impact mitigating structure according to claim 3, a coupling portion that couples the outer spherical body and the inner spherical body is provided, and the inner spherical body is coupled to the outer spherical body via the coupling portion in a normal time. . When an impact force of a predetermined value or more acts on the outer spherical body, the coupling state of the outer spherical body and the inner spherical body by the coupling portion is released, and the inner spherical body can move with respect to the outer spherical body. Thus, by moving the inner spherical body, the impact energy is converted into kinetic energy and potential energy, and the impact energy is effectively absorbed.

  The impact relaxation structure according to claim 4 is the impact relaxation structure according to claim 2 or 3, wherein at least the outer spherical body is an elastic body.

  In the impact relaxation structure according to the fourth aspect, at least the outer spherical body is an elastic body. Therefore, when an impact force acts on the outer spherical body, the outer spherical body is elastically deformed. Thereby, impact energy is absorbed.

  The impact relaxation structure according to claim 5 is the impact relaxation structure according to any one of claims 2 to 4, wherein a viscous fluid is provided between the outer spherical body and the inner spherical body.

  In the impact mitigating structure according to claim 5, when the inner spherical body moves by providing the viscous fluid between the outer spherical body and the inner spherical body, the inner spherical body has a viscous resistance due to the viscous fluid. Will act. Thereby, the impact on the inner spherical body can be reduced.

  The impact mitigating structure according to claim 6 is configured by combining a plurality of impact mitigating units constituted by the outer member and the inner member according to any one of claims 1 to 5.

  The impact mitigating structure according to claim 6, wherein the outer member and the inner member are provided so as to be movable within the outer member, and are moved when an impact force acts on the outer member, and the impact energy is converted into at least kinetic energy. And a plurality of impact mitigation units configured in combination. Thereby, the space formed by the shock relaxation structure can be expanded while exhibiting high shock absorption performance.

  As described above in detail, the impact relaxation structure according to claim 1 has an excellent effect of being able to exhibit high shock absorption performance even when the crushable zone cannot be sufficiently secured.

  The impact relaxation structure according to claim 2 has an excellent effect that the impact energy can be effectively absorbed in a narrow space by the impact relaxation by the circular motion of the inner member.

  The impact relaxation structure according to claim 3 has an excellent effect that the impact energy can be absorbed by energy conversion.

  The impact relaxation structure according to claim 4 has an excellent effect that the impact energy can be absorbed by elastic deformation of the outer spherical body.

  The impact relaxation structure according to claim 5 has an excellent effect that the impact energy can be absorbed by the viscous resistance by the viscous fluid.

  The impact relaxation structure according to claim 6 has an excellent effect that it can expand the crushable zone to exhibit higher shock absorption performance.

1 is a side view schematically showing a vehicle to which an impact relaxation structure according to an embodiment of the present invention is applied. FIG. 2 is a plan view of the vehicle body structure shown in FIG. 1. (A)-(D) are side views explaining the effect | action when the vehicle structure shown by FIG. 1 collides front. (A), (B) is a top view explaining the effect | action when the vehicle shown by FIG. 1 collides front. (A)-(D) are the side views explaining the effect | action when the vehicle shown by FIG. 1 carries out the side collision. It is a block diagram explaining the structure of the coupling | bond part of an outer spherical body and an inner spherical body. It is a side view which shows typically the integrated vehicle in which the outer spherical body and the inner spherical body were provided integrally. 5 is a graph showing a relationship between a combined acceleration of an inner spherical body and a time in a vehicle collision in an integrated vehicle and a separated vehicle. (A) and (B) are the side views explaining the effect | action at the time of a vehicle colliding front, which shows the modification (1) of the vehicle which concerns on one Embodiment of this invention. (A) and (B) are the side views explaining the effect | action at the time of a vehicle colliding front, which shows the modification (2) of the vehicle which concerns on one Embodiment of this invention. (A), (B) is a top view of the vehicle shown by FIG. (A) and (B) are the side views explaining the effect | action at the time of a vehicle colliding front, which shows the other example of the modification (2) of the vehicle which concerns on one Embodiment of this invention. (A) and (B) are the side views explaining the effect | action at the time of a vehicle colliding front, which shows the modification (3) of the vehicle which concerns on one Embodiment of this invention. (A), (B) is a top view of the vehicle body structure shown by FIG. (A), (B) is a side view explaining the effect | action at the time of a vehicle colliding front, which shows the other example of the modification (3) of the vehicle which concerns on one Embodiment of this invention. (A), (B) is a top view of the vehicle body structure shown by FIG. (A) and (B) are the side views explaining the effect | action at the time of a vehicle colliding front, which shows the modification (4) of the vehicle which concerns on one Embodiment of this invention. (A), (B) is a top view of the vehicle shown by FIG. (A), (B) is a side view explaining the effect | action at the time of the vehicle colliding front, which shows the other example of the modification (4) of the vehicle which concerns on one Embodiment of this invention. (A), (B) is a top view of the vehicle shown by FIG. (A), (B) is a side view explaining the effect | action at the time of the vehicle colliding front, which shows the other example of the modification (4) of the vehicle which concerns on one Embodiment of this invention. (A), (B) is a top view of the vehicle shown by FIG. It is a typical perspective view which shows the modification (5) of the vehicle which concerns on one Embodiment of this invention. It is a typical perspective view which shows the other example of the modification (5) of the vehicle which concerns on one Embodiment of this invention. It is a typical perspective view which shows the other example of the modification (5) of vehicle construction which concerns on one Embodiment of this invention. It is a typical side view showing modification (6) of a vehicle concerning one embodiment of the present invention. FIG. 27 is a plan view of the vehicle shown in FIG. 26.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Note that an arrow UP, an arrow FR, and an arrow RH shown in the drawings respectively indicate the vehicle up-down direction upper side, the vehicle front-rear direction front side, and the vehicle width direction right side.

(Composition of impact relaxation structure)
1 and 2 are schematic views of a vehicle 10 to which an impact relaxation structure according to an embodiment of the present invention is applied. FIG. 1 shows a side view of the vehicle 10, and FIG. 2 shows a plan view of the vehicle 10. In the drawings other than the above, a schematic diagram of the vehicle is shown.

  As shown in FIGS. 1 and 2, the vehicle 10 includes a substantially flat chassis 14 with tires 12 attached to corners, and a substantially spherical outer surface provided on the chassis 14 as an outer member. A spherical body 16 and a substantially spherical inner spherical body 18 as an inner member which is provided inside the outer spherical body 16 and is smaller than the outer shape of the outer spherical body 16 are configured.

  Here, the inside of the inner spherical body 18 is a cabin. The inner spherical body 18 and the outer spherical body 16 are formed of a substantially transparent reinforced resin having high rigidity and strength. Although not shown, the inner spherical body 18 and the outer spherical body 16 are provided with doors, respectively. And can enter the cabin through the door.

  Energy absorbing members 20 and 22 are provided at the front and rear ends of the chassis 14, respectively. The energy absorbing members 20 and 22 absorb impact energy due to an impact force acting on the vehicle 10. The energy absorbing members 20 and 22 are not essential components.

  On the other hand, as shown in FIG. 2, the inner spherical body 18 is disposed at the center of the outer spherical body 16 in the vehicle front-rear direction and the vehicle width direction, and the lower portion of the inner spherical body 18 and the lower portion of the outer spherical body 16 are They are coupled by the coupling unit 24. The coupling portion 24 is set so that the coupling state between the inner spherical body 18 and the outer spherical body 16 is released when an impact force of a predetermined value or more acts on the outer spherical body 16. The coupling unit 24 will be described separately.

  3A to 3D and FIGS. 4A and 4B show the movement of the inner spherical body 18 when the vehicle 10 collides with the front, and FIGS. ) Is a side view of the vehicle 10, and FIGS. 4A and 4B are plan views of the vehicle 10.

  As shown in FIGS. 3 (A), 3 (B) and 4 (A), when the vehicle 10 collides with the impacted member 26 and the impact force acting on the outer spherical body 16 is a predetermined value or more, The coupling state between the inner spherical body 18 and the outer spherical body 16 is released. Therefore, the inner spherical body 18 circularly moves along the shape of the outer spherical body 16 in the outer spherical body 16 as shown in FIGS. 3B to 3D and FIG. I do. In addition, the dashed-dotted line in the inner side spherical body 18 shown to FIG. 3 (A)-(D) is a horizontal line in the initial position of the inner side spherical body 18 shown in FIG. 3 (A).

  5A to 5D show the movement of the outer spherical body 16 when the vehicle 10 has a side collision. In addition, the dashed-dotted line in the outer spherical body 16 shown to FIG. 5 (A)-(D) is a horizontal line in the initial position of the outer spherical body 16 shown to FIG. 5 (A). As shown in FIGS. 5 (A) and 5 (B), when the vehicle 10 rolls over due to a side collision, the outer spherical body 16 has a substantially spherical shape, so that it is shown in FIGS. 5 (B) to 5 (D). As a result, the outer spherical body 16 itself rotates.

  Here, as to whether or not the impact force acting on the outer spherical body 16 is greater than or equal to a predetermined value, the impact force is detected by a detection device 28 (see FIG. 6) such as a load sensor provided in the vehicle 10. Data detected by the detection device 28 shown in FIG. 6 is transmitted to the control unit 30. And when the impact force which acts on the outer side spherical body 16 is more than predetermined value, it sets so that the coupling | bonding state by the coupling | bond part 24 may be cancelled | released.

(Operation and effect of impact relaxation structure)
As shown in FIG. 1, in this embodiment, an inner spherical body 18 is provided inside an outer spherical body 16 provided on a chassis 14 constituting the vehicle 10. That is, the outer spherical body 16 and the inner spherical body 18 have a double structure, and the inner spherical body 18 is movably provided in the outer spherical body 16. Then, as shown in FIGS. 3A to 3D, when an impact force acts on the vehicle 10 and the coupled state between the inner spherical body 18 and the outer spherical body 16 is released, the inner spherical body is caused by the inertial force. 18 moves.

  Thereby, the impact energy by the impact force is converted into at least kinetic energy, and the impact energy is absorbed. That is, the impact energy is absorbed by the frictional resistance caused by the movement of the inner spherical body 18 within the outer spherical body 16. Further, since the outer spherical body 16 and the inner spherical body 18 form a spherical shape, when an impact force acts on the vehicle 10, the inner spherical body 18 moves circularly along the shape of the outer spherical body 16 within the outer spherical body 16. For this reason, the impact energy due to the impact force acting on the outer spherical body 16 is converted into kinetic energy and potential energy, so that the impact energy can be absorbed effectively, and a higher shock absorption performance than before can be achieved. It can be demonstrated.

  Further, as shown in FIGS. 5A to 5D, when the outer spherical body 16 falls, the impact acting on the outer spherical body 16 due to frictional resistance with the ground while the outer spherical body 16 rotates. The force can be reduced. That is, even if the impact is on the vehicle 10 from any direction, the impact can be mitigated by the rotation of the outer spherical body 16 and the circular motion of the inner spherical body 18.

  Further, since the collision stroke can be ensured by the circular motion of the inner spherical body 18, the impact energy can be effectively absorbed in a narrow space. Furthermore, since the inner spherical body 18 and the outer spherical body 16 are formed of reinforced resin, the vehicle 10 can be reduced in weight while exhibiting high shock absorption performance.

  Here, FIG. 7 shows an integrated (non-separable) vehicle 100 in which an outer spherical body 16 and an inner spherical body 18 are integrally provided. FIG. 8 shows the synthesis of the inner spherical body 18 in a vehicle collision in the integrated vehicle 100 shown in FIG. 7 and the separation type vehicle 10 in which the outer spherical body 16 and the inner spherical body 18 shown in FIG. The relationship between acceleration and time is shown. Here, the “synthetic acceleration” is the square sum of squares of the triaxial acceleration of the inner spherical body 18.

  According to this, when the integrated vehicle 100 shown in FIG. 7 receives a collision load, the impact received by the outer spherical body 102 is also transmitted to the inner spherical body 104 in the same manner, and therefore, as shown in FIG. In addition, immediately after receiving an impact, a large acceleration is generated in the inner spherical body 104.

  On the other hand, when the separation type vehicle 10 shown in FIG. 1 receives a collision load, as shown in FIGS. 3A to 3D, the inner spherical body 18 performs a circular motion with respect to the outer spherical body 16. . In other words, in the case of the separation type vehicle 10, it can be seen that the resultant acceleration of the inner spherical body 18 is intermittent and the resultant acceleration is dispersed, and only a small acceleration is generated as compared with the integrated vehicle 100.

  In other words, even when the crushable zone cannot be sufficiently secured, the impact force is reduced by the circular movement of the inner spherical body 18 along the shape of the outer spherical body 16 within a narrow range. In addition, the inner spherical body 18 revolves with respect to the outer spherical body 16 in a state where the inner spherical body 18 does not rotate by causing slippage between the inner spherical body 16 and the outer spherical body 16 while making a circular motion in the outer spherical body 16. It becomes possible to do.

(Other embodiments)
(1) As shown in FIGS. 3A to 3D, in this embodiment, an inner spherical body 18 smaller than the outer spherical body 16 is provided inside the outer spherical body 16. A space 32 is provided between the outer spherical body 16 and the inner spherical body 18, and the space 32 is filled with a viscous fluid 34 as shown in FIGS. 9A and 9B. You may let them.

  According to this, when the inner spherical body 18 moves, a viscous resistance due to the viscous fluid 34 acts on the inner spherical body 18. For this reason, impact energy can be absorbed also by viscous resistance by the viscous fluid 34. Note that the space between the door (not shown) provided on the outer spherical body 16 and the door (not shown) provided on the inner spherical body 18 is not filled with the viscous fluid 34.

(2) Also, as shown in FIGS. 3A to 3D, in this embodiment, when the coupling state of the coupling portion 24 that couples the inner spherical body 18 and the outer spherical body 16 is released, The inner spherical body 18 performs a circular motion along the shape of the outer spherical body 16, and this circular motion is movable in all directions, but the direction of the circular motion of the inner spherical body 18 is specified. May be set.

  For example, as shown in FIG. 10A, an annular rail 36 is provided on the inner circumferential surface of the outer spherical body 16 on the concentric circle of the outer spherical body 16 along the vehicle longitudinal direction. A roller 38 is engaged with 36. The roller 38 can move along the rail 36. On the other hand, the inner spherical body 18 is provided with a roller 39 that rotates together with the roller 38, and the roller 39 and the roller 38 are coupled to each other by the coupling portion 40. Then, as shown in FIGS. 10A and 10B and FIGS. 11A and 11B, the inner spherical body 18 can move along the rail 36 through the roller 38.

  That is, the inner spherical body 18 performs a circular motion along the vehicle longitudinal direction within the outer spherical body 16. Here, the roller 38 is engaged with the rail 36 so that it cannot be easily removed. For this reason, for example, as shown in FIG. 10B, even when the circular motion of the inner spherical body 18 stops when the inner spherical body 18 moves to the upper part of the outer spherical body 16, the inner spherical body 18 It can move to the lower part of the outer spherical body 16 via the roller 39, the roller 38 and the rail 36. That is, the inner spherical body 18 does not fall from the upper part of the outer spherical body 16.

  10A, the initial position of the inner spherical body 18 is disposed below the outer spherical body 16. However, as shown in FIG. 12A, the initial position of the inner spherical body 18 is the outer side. You may set so that it may arrange | position to the upper part of the spherical body 16. FIG. According to this, even when the vehicle 10 receives a drop impact, the inner spherical body 18 moves to the lower part of the outer spherical body 16 via the roller 39, the roller 38 and the rail 36 as shown in FIG. Since it can move, the drop impact to the inner spherical body 18 is reduced.

  Moreover, the joining method of the outer spherical body 16 and the inner spherical body 18 is not limited to the above. For example, although not shown, a slider that engages with the rail 36 may be used instead of the roller 38. In this case, in order to reduce the coefficient of friction between the rail 36 and the slider, it is better to apply a lubricant to the sliding surfaces of the rail 36 and the slider. Further, instead of the rail 36, a ball bearing may be embedded in the inner peripheral surface of the outer spherical body 16.

(3) Further, as shown in FIG. 1, in the present embodiment, the outer spherical member 16 and the inner spherical member 18 are formed in which the outer member and the inner member form a spherical member, but the present invention is not limited to this. For example, as shown in FIGS. 13A and 14A, an outer cylindrical body 42 and an inner cylindrical body 44 in which the outer member and the inner member form a cylindrical body may be used.

  In this case, the outer cylindrical body 42 is arranged so that the axial center of the outer cylindrical body 42 is along the vehicle width direction of the vehicle 10, and the inner cylindrical body 44 has an axial center of the vehicle 10 inside the outer cylindrical body 42. The inner cylindrical body 44 is arranged along the vehicle width direction. Accordingly, as shown in FIGS. 13B and 14B, the inner cylindrical body 44 can circularly move in the vehicle front-rear direction along the circumferential direction of the outer cylindrical body 42. As shown in FIGS. 15A and 15B and FIGS. 16A and 16B, the outer member is a cylindrical body (outer cylindrical body 42) and the inner member is a spherical body (inner spherical body 18). It may be.

(4) Also, as shown in FIGS. 17A and 18A, the outer member 50 and the inner member 52 are formed by the outer member 50 and the inner member 52. The outer cylindrical body 50 is arranged so that the shaft core is along the height direction of the vehicle 10, and the inner cylindrical body 52 is placed inside the outer cylindrical body 50 so that the shaft core is along the height direction of the vehicle 10. The inner cylindrical body 52 may be arranged. Accordingly, as shown in FIGS. 17A and 17B and FIGS. 18A and 18B, the inner cylindrical body 52 extends in the vehicle width direction and the vehicle longitudinal direction along the circumferential direction of the outer cylindrical body 50. A circular motion is possible.

  Furthermore, as shown in FIGS. 19A and 19B and FIGS. 20A and 20B, the outer member is a cylindrical body (outer cylindrical body 50) and the inner member is a spherical body (inner spherical body 18). As shown in FIGS. 21A and 21B and FIGS. 22A and 22B, the outer member is a spherical body (outer spherical body 16) and the inner member is a cylindrical body. (Inner cylindrical body 52) may be used.

(5) In FIGS. 1 to 22, the outer members 16, 42, 50 or the inner members 18, 44, 52 form a spherical body or a cylindrical body, but other than this, at least the outer member and the inner member One may be configured such that a substantially spherical body is formed by an annular frame made of steel or aluminum.

  For example, as shown in FIG. 23, the outer member 54 may be formed in a substantially spherical shape by coupling a plurality of annular frames 56, and the inner spherical body 18 may be provided inside the outer member 54. Since the outer member 54 formed of the annular frame 56 can be elastically deformed in the elastic region, when an impact force acts on the outer member 54, the outer member 54 is elastically deformed, thereby absorbing the impact energy. Is done.

  Further, as shown in FIG. 24, the inner member 60 provided inside the outer spherical body 16 may be formed in a substantially spherical shape by coupling a plurality of annular frames 62. In this case, the inner member 60 constituted by the annular frame 62 can be elastically deformed in the elastic region. Therefore, when an impact force is applied to the inner member 60, the inner member 60 is elastically deformed. Energy is absorbed.

  As shown in FIG. 25, an inner member 60 constituted by an annular frame 62 may be provided inside an outer member 54 constituted by an annular frame 56. In this case, since the outer member 54 and the inner member 60 can be elastically deformed in the elastic region, when an impact force acts on the outer member 54, the impact energy is absorbed by the elastic deformation of the outer member 54 and the inner member 60. Is done.

(6) Moreover, in FIGS. 1-22, although the vehicle 10 is comprised by the one vehicle body unit 64 which has the outer spherical body 16 and the inner spherical body 18, as FIG.26 and FIG.27 shows, The vehicle 66 may have a configuration in which a plurality of vehicle body units 64 are combined. According to this, the space formed by the shock relaxation structure can be expanded while exhibiting high shock absorption performance.

  In addition, about the shape of an outer side member and an inner side member, since an inner side member should just be able to carry out circular motion, elliptical shape is also contained in spherical shape and a cylindrical shape. In the present embodiment, the inside of the inner spherical body 18 is a cabin, but the inside of the inner spherical body 18 may be a storage. The present invention is not limited to vehicles.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

10 Vehicle 16 Outer spherical body (outer member)
18 Inner spherical body (inner member)
24 coupling portion 34 viscous fluid 42 outer cylindrical body (outer member)
44 Inner cylinder (inner member)
50 Outer cylinder (outer member)
52 Inner cylinder (inner member)
54 Outer member 60 Inner member 64 Body unit 66 Vehicle

Claims (6)

An outer member;
An inner member that is movably provided in the outer member, moves when an impact force acts on the outer member, and converts impact energy into at least kinetic energy;
Having an impact relaxation structure.   The impact mitigating structure according to claim 1, wherein the outer member is an outer spherical body having a spherical shape, and the inner member is an inner spherical body having a spherical shape.   The impact mitigating structure according to claim 2, wherein the outer spherical body and the inner spherical body are coupled, and a coupling portion that releases a coupled state when an impact force of a predetermined value or more acts on the outer spherical body. .   The impact relaxation structure according to claim 2 or 3, wherein at least the outer spherical body is an elastic body.   The impact relaxation structure according to any one of claims 2 to 4, wherein a viscous fluid is provided between the outer spherical body and the inner spherical body.   The impact mitigation structure comprised by combining two or more impact mitigation units comprised by the outer member and inner member of any one of Claims 1-5.

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