Impact absorbing device

Abstract

Provided is an impact absorbing device that improves the degree of freedom of the arrangement position. The impact absorbing device is installed to a mounting target that constitutes a vehicle and mitigates an impact during operation, and includes a base portion that is fixed to the mounting target; an impact absorbing portion that has flexibility and is installed to the base portion in a manner that reversibly switches between a housed state in which the impact absorbing portion is retracted to the base portion side and a protruding state in which the impact absorbing portion protrudes from the base portion; and a drive portion that drives the impact absorbing portion to reversibly switch between the housed state and the protruding state. The drive portion switches the impact absorbing portion from the housed state to the protruding state at least when the impact absorbing portion is operated.

Description

Technical Field

[0001] This disclosure relates to an impact absorption device for vehicles. Background Technology

[0002] Previously, a technology was known for use in vehicles to absorb impacts from accidents, etc. For example, Patent Document 1 describes an energy-absorbing device that protects pedestrians and others from collisions with a vehicle's bumper by absorbing impacts generated at the bumper. In this energy-absorbing device, gaps are formed between multiple fin-like portions connected to a base and absorbing the impact.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: US Patent No. 10046723 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In impact absorption devices, it is necessary to form a region where the impact-absorbing component can flex. For example, in the energy absorption device described in Patent Document 1, the gap between multiple fins corresponds to this region. In the case of impact absorption devices, if such a region is formed, the overall structure becomes a larger structure, thus restricting its installation location in a vehicle and reducing the degree of freedom in its placement.

[0008] This disclosure was made in view of the above-mentioned problems, and its object is to provide an impact absorbing device that can improve the degree of freedom of the configuration position.

[0009] Technical solutions to the problem

[0010] To address the aforementioned issues, this disclosure includes an impact-absorbing section capable of reversibly switching between a stowed state and a protruding state.

[0011] Specifically, this disclosure discloses an impact absorption device installed on a vehicle to mitigate impacts during operation. The impact absorption device comprises: a base fixed to the vehicle; an impact absorption section mounted on the base in a reversible manner switchable between a retracted state (within the base) and a protruding state (protruding from the base), and having flexibility; and a drive unit that drives the impact absorption section to reversibly switch between the retracted state and the protruding state, wherein when the impact absorption section is activated, the drive unit causes the impact absorption section to switch at least from the retracted state to the protruding state.

[0012] In the aforementioned shock-absorbing device, the shock-absorbing section can switch between a retracted state and a protruding state. Therefore, when not in operation, the shock-absorbing section remains in the retracted state, thereby preventing its volume from increasing and thus increasing the flexibility of its configuration. Furthermore, the shock-absorbing section in the shock-absorbing device is flexible, so it can return to its original shape after operation, and it can switch between a protruding state and a retracted state, thus enabling reuse.

[0013] In the aforementioned impact absorption device, the impact absorption section may include multiple rows of impact absorption members, each rotatably mounted on a plurality of first rotating shafts. These first rotating shafts extend relative to the mounting surface of the base in a first direction and are spaced apart in directions orthogonal to this first direction. Each of the multiple rows of impact absorption members maintains a collapsed posture along the mounting surface in the retracted state. When switching from the retracted state to the protruding state, each of the multiple rows of impact absorption members is rotated in a predetermined starting direction centered on the first rotating shaft, changing from the collapsed posture to an upright posture. When switching from the protruding state to the retracted state, each of the multiple rows of impact absorption members is rotated in a collapsing direction opposite to the starting direction centered on the first rotating shaft, changing from the upright posture to the collapsed posture. With this structure, the impact absorption device can prevent the volume of the impact absorption members from increasing in the retracted state by setting the impact absorption members to a collapsed posture in the retracted state and to an upright posture in the protruding state.

[0014] The aforementioned impact-absorbing device may include a limiting part that restricts the rotation of the impact-absorbing member about the first rotation axis in the starting direction when the member switches from the collapsed position to the upright position. Thus, the impact-absorbing device can reliably switch the impact-absorbing member to the upright position.

[0015] In the aforementioned impact absorption device, the impact absorption section may further include a plurality of auxiliary components. These auxiliary components are flexible components that allow the impact absorption component to stand upright. They are mounted on the mounting surface in a manner that allows free rotation about a second rotation axis intersecting the first rotation axis. In the retracted state, each of the auxiliary components maintains a folded posture along the mounting surface such that a part of the impact absorption component, which is the object to be erected, covers at least a portion of the auxiliary component from above. When switching from the retracted state to the protruding state, each of the auxiliary components is rotated in a predetermined starting direction centered on the second rotation axis to switch from the folded posture to the upright posture. And when switching from the protruding state to the retracted state, each of the auxiliary components is rotated in a folding direction opposite to the starting direction centered on the second rotation axis to switch from the upright posture to the folded posture. When the auxiliary component switches from the folded posture to the upright posture, the impact absorption component, which is the object to be erected, is pushed up, causing the impact absorption component to rotate in the starting direction of the first rotation axis. The impact-absorbing part with such a structure can prevent the auxiliary component from increasing in size when it is in the stored state by setting the auxiliary component to a folded position when it is in the stored state and setting the auxiliary component to an upright position when it is in the protruding state.

[0016] In the aforementioned impact-absorbing device, the auxiliary member may have a first abutting portion that abuts against the impact-absorbing member, which is the object to be erected, when switching to the upright posture, thereby restricting the impact-absorbing member from rotating in the direction of collapse. An impact-absorbing device with such a structure can maintain the impact-absorbing member in an upright posture even when force is applied to it.

[0017] In the aforementioned shock-absorbing device, the auxiliary member may have a second abutting portion that abuts against other shock-absorbing members in adjacent rows that are the objects to be erected when switching to the upright posture. With such a structure, the shock-absorbing member can be maintained in an upright posture even when force is applied to it.

[0018] In the aforementioned impact-absorbing device, the angle between the first rotating shaft and the second rotating shaft may be an acute angle, and the impact-absorbing member may have a groove that suppresses interference between the auxiliary member and its second contact portion during the transition from the prone position to the upright position. With this structure, the impact-absorbing device can reliably switch the impact-absorbing member from the prone position to the upright position via the auxiliary member.

[0019] In the aforementioned impact-absorbing device, at least a portion of the plurality of auxiliary members may be intermediate auxiliary members disposed between the impact-absorbing member of the upright object and other rows of impact-absorbing members adjacent to the impact-absorbing member. In the upright position, the impact-absorbing member of the upright object abuts against the first abutting portion of the intermediate auxiliary member, and the impact-absorbing members of the other rows abut against the second abutting portion of the intermediate auxiliary member. With this structure, the impact-absorbing device can maintain the impact-absorbing member in an upright position even when force is applied to it.

[0020] In the aforementioned impact absorption device, the impact absorption unit may further include one or more driving force transmission members connected to the auxiliary member, and at least a portion of these members being flexible and driven by the driving unit. When the driving unit activates the impact absorption unit, the driving force transmission members are driven, thereby switching the auxiliary member from the collapsed position to the standing position. Attached to the auxiliary member, the impact absorption unit switches from the collapsed position to the standing position. In this way, multiple driving force transmission members may be provided, or only one may be provided.

[0021] In the aforementioned impact absorption device, the impact absorption section may include a single driving force transmission member, to which the plurality of auxiliary members are connected. Thus, only one driving force transmission member may be provided.

[0022] In the aforementioned impact-absorbing device, the driving force transmission member may have a plate-like portion that remains parallel to the mounting surface and is driven by the driving unit. With such a structure, the plate-like portion of the driving force transmission member can be used to support a portion of the occupant's body, thus providing appropriate protection for the occupant.

[0023] Furthermore, in the aforementioned impact absorption device, a plurality of impact absorption sections may be provided, with a plurality of holes formed on the mounting surface of the base. Each of the plurality of impact absorption sections is disposed in each of the plurality of holes. In the retracted state, the impact absorption section is housed within the hole. In the protruding state, the impact absorption section protrudes from the hole. The driving unit expands the impact absorption section by supplying fluid to its interior, switching it to the protruding state. It should be noted that the fluid may be a specified liquid such as compressed air or water.

[0024] In the aforementioned shock-absorbing device, the mounting surface may be an inner lining forming the interior of the vehicle compartment, and each of the plurality of shock-absorbing parts may be configured to protrude from the opening toward the passenger riding in the vehicle. Such a shock-absorbing device can be installed inside the vehicle compartment, thus increasing the flexibility of its configuration.

[0025] Invention Effects

[0026] According to the technology disclosed herein, the degree of freedom in the placement of the impact absorption device can be increased. Attached Figure Description

[0027] Figure 1A This is a schematic perspective view (one of the embodiments) of the impact absorption device.

[0028] Figure 1B This is a schematic perspective view (second one) of the impact absorption device according to Embodiment 1.

[0029] Figure 2A This is a schematic top view (one of) of the impact absorption device according to Embodiment 1.

[0030] Figure 2B This is a schematic top view (second one) of the impact absorption device according to Embodiment 1.

[0031] Figure 3A This is a schematic perspective view (third one) of the impact absorption device according to Embodiment 1.

[0032] Figure 3B This is a schematic perspective view (fourth) of the impact absorption device according to Embodiment 1.

[0033] Figure 4A This is a schematic top view (third one) of the impact absorption device of Embodiment 1.

[0034] Figure 4B This is a schematic top view (fourth) of the impact absorption device according to Embodiment 1.

[0035] Figure 5A This is a schematic perspective view (fifth) of the impact absorption device according to Embodiment 1.

[0036] Figure 5B This is a schematic perspective view (sixth) of the impact absorption device according to Embodiment 1.

[0037] Figure 6A This is a schematic top view (fifth) of the impact absorption device according to Embodiment 1.

[0038] Figure 6BThis is a schematic top view (sixth) of the impact absorption device according to Embodiment 1.

[0039] Figure 7 This is a block diagram of the impact absorption device according to Embodiment 1.

[0040] Figure 8 This is a flowchart related to the processing performed by the control unit of the impact absorption device in Embodiment 1.

[0041] Figure 9 This is a schematic perspective view (one) of the impact absorption device according to Embodiment 2.

[0042] Figure 10 This is a schematic perspective view (second example) of the impact absorption device according to Embodiment 2. Detailed Implementation

[0043] Hereinafter, the impact absorption device according to embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be noted that the various components and combinations of components in each embodiment are merely examples, and appropriate additions, omissions, substitutions, and other modifications to the components can be made without departing from the spirit of the present disclosure. This disclosure is not limited to the embodiments, but only to the claims.

[0044] <Implementation Method 1>

[0045] The impact-absorbing device of Embodiment 1 will be described. This embodiment of the impact-absorbing device is exemplified as a device installed in a vehicle, such as an automobile, to protect occupants of the vehicle. The impact-absorbing device is installed on a component constituting the vehicle and protects the occupants during operation. It should be noted that, for example, components constituting the vehicle include structures such as pillars and roofs that form the vehicle body, as well as objects fixed to the vehicle body such as dashboards and steering wheels. The impact-absorbing device is fixed to the vehicle by being installed on such a component.

[0046] Next, based on Figures 1A to 2B The impact absorption device 10 of this embodiment will be described in detail. Figure 1A , Figure 1B This is a perspective view schematically showing the appearance of the impact absorption device 10 of this embodiment. Figure 2A , Figure 2B This is a top view schematically showing the appearance of the impact-absorbing device 10 according to this embodiment. The impact-absorbing device 10 includes: a base 11, which is mounted on a vehicle; and an impact-absorbing part 12, which is mounted on the surface side (an example of a "mounting surface") of the base 11. The base 11 has a rectangular plate shape, the impact-absorbing part 12 is disposed on the surface side, and it is mounted on the back side of the vehicle. Later, as... Figures 1A to 2BAs shown, the direction along the long side of the base 11 is defined as the X-axis, the direction along the short side of the base 11 is defined as the Y-axis, and the direction orthogonal to both the X-axis and Y-axis (the direction orthogonal to the surface and back of the base) is defined as the Z-axis. The impact absorption device 10 is a device for protecting occupants who are the protected objects located in the Z-axis direction. It should be noted that the direction along the X-axis is defined as a "column" in a row and column, and the direction along the Y-axis is defined as a "row" in a row and column.

[0047] The impact-absorbing section 12 is flexible as a whole, deforming in the event of a collision where the occupant experiences inertial force due to a vehicle accident, thereby absorbing the force (load) applied to the occupant. Thus, the impact-absorbing section 12 protects the occupant. The impact-absorbing section 12 is configured to protrude towards the passenger compartment side where the occupant is seated. More specifically, the impact-absorbing section 12 is configured to reversibly switch between a retracted state (receding from the passenger compartment to the base 11 side) and a protruding state (protruding from the base 11 towards the passenger compartment side). Figures 1A to 2B In the state shown, the impact absorption section 12 is in the stored state.

[0048] The impact-absorbing section 12 includes: an impact-absorbing member 20; a fin-shaped portion 21 (an example of an "auxiliary member"); and a top plate portion 22 (an example of a "driving force transmission member"). It should be noted that, in Figure 1A and Figure 2A For illustrative purposes, the top plate 22 is omitted from the illustration.

[0049] The impact-absorbing member 20 is formed of rubber or the like and is flexible. The impact-absorbing member 20 has a shape that extends integrally along the X-axis direction, with three members arranged in three rows along the Y-axis direction. The impact-absorbing member 20 is mounted to the surface side of the base 11 in a manner that allows it to rotate freely relative to a rotation axis 20A (an example of a "first rotation axis"), which extends relative to the surface of the base 11 in the X-axis direction (an example of a "first direction"). Figure 1A and Figure 2A In the diagram, the rotation axis 20A is indicated by a dashed line. The rotation axes 20A of the three impact-absorbing members 20 are spaced apart along the Y-axis (an example of the "second direction") in a manner that allows each impact-absorbing member 20 to operate without interference. It should be noted that, later, there may be cases where the three impact-absorbing members arranged in three rows are referred to as multi-row impact-absorbing members 20. Thus, the impact-absorbing section 12 includes multi-row impact-absorbing members 20.

[0050] like Figure 1AAs shown, each of the multiple rows of impact-absorbing members 20 maintains a collapsed posture along the surface of the base 11 in the retracted state. When switching from the retracted state to the protruding state, each of the multiple rows of impact-absorbing members 20 is rotated in the starting direction centered on the rotation axis 20A, changing from the collapsed posture to an upright posture standing above the surface of the base 11. When viewed in the positive direction toward the X-axis, the starting direction of the impact-absorbing member 20 is right-hand rotation. Furthermore, when switching from the protruding state to the retracted state, each of the multiple rows of impact-absorbing members 20 is rotated in the collapsing direction opposite to the starting direction centered on the rotation axis 20A, changing from the upright posture to the collapsed posture. When viewed in the positive direction toward the X-axis, the collapsing direction of the impact-absorbing member 20 is left-hand rotation. In this way, each of the multiple rows of impact-absorbing members 20 is configured to reversibly switch between the retracted state and the protruding state.

[0051] The fins 21 are formed of rubber or the like and are flexible. The fins 21 cause the impact-absorbing member 20 to stand upright by transmitting power from the drive unit to the impact-absorbing member 20. In this embodiment, four fins 21 are arranged relative to one impact-absorbing member 20. That is, the fins 21 are arranged in four rows along the X-axis and in three columns along the Y-axis, for a total of 12. The plurality of fins 21 are mounted on the surface of the base 11 around a rotation axis 21A (an example of a "second rotation axis") that intersects the rotation axis 20A. Figure 2A In the diagram, a dashed line represents the rotation axis 21A of the fin-shaped portions 21 in the first row and second column. It should be noted that the rotation axes 21A of each fin-shaped portion 21 are parallel to each other. Multiple fin-shaped portions 21 can rotate freely around the rotation axis 21A.

[0052] In the retracted state, each of the plurality of fins 21 maintains a folded posture along the surface of the base 11 such that it covers at least a portion of the impact-absorbing member 20, which is intended to be erected, from above. It should be noted that each of the plurality of fins 21 causes the impact-absorbing member 20 arranged in the same row to stand upright. When switching from the retracted state to the protruding state, each of the plurality of fins 21 is rotated in a starting direction centered on the rotation axis 21A to switch from a folded posture to an upright posture. When viewed in the positive direction toward the Y-axis, the starting direction of the fins 21 is left-handed. Furthermore, when switching from the protruding state to the retracted state, each of the plurality of fins 21 is rotated in a folding direction opposite to the starting direction centered on the rotation axis 21A to switch from an upright posture to a folded posture. When viewed in the positive direction toward the Y-axis, the folding direction of the fins 21 is right-handed. When the fin-shaped part 21 changes from a folded position to an upright position, the impact-absorbing member 20, which is the object to be uprighted, can be pushed up, causing the impact-absorbing member 20 to rotate in the starting direction of the rotation axis 20A. It should be noted that the angle between the rotation axis 20A of the impact-absorbing member 20 and the rotation axis 21A of the fin-shaped part 21 is not a right angle, but preferably an acute angle.

[0053] Figure 1B and Figure 2B The top plate portion 22 shown is formed of rubber or the like and is flexible. The top plate portion 22 is provided to transmit power from the drive unit to each fin portion 21 via a drive unit. The top plate portion 22 has connecting portions 22A to 22C, which connect to each other in the same row of fin portions 21, that is, to each fin portion 21 of the same impact-absorbing member 20 that is intended for erection. Each connecting portion 22A to 22C has a shape that is longitudinal along the X-axis. Connecting portion 22A connects to each fin portion 21 in the first row. Connecting portion 22B connects to each fin portion 21 in the second row. Connecting portion 22C connects to each fin portion 21 in the third row. Thus, the top plate portion 22 connects to all the fin portions 21.

[0054] Furthermore, the top plate portion 22 has a pair of connecting portions 22D that connect the connecting portions 22A to 22C to form a single unit. Each connecting portion 22D connects the connecting portions 22A to 22C at both ends along the X-axis. Thus, the top plate portion 22 can transmit the power of the drive unit to all the fin portions 21. In this embodiment, the impact absorption unit 12 includes a single top plate portion 22 integrally formed by the connecting portions 22A, 22B, 22C and the connecting portion 22D.

[0055] When the drive unit of the impact absorption device 10 activates the impact absorption unit 12, the top plate 22 is driven, thereby changing each fin-shaped part 21 from a collapsed position to an upright position, and the impact absorption member 20, attached to each fin-shaped part 21, also changes from a collapsed position to an upright position. Thus, the impact absorption device 10 of this embodiment can, via the drive unit, switch the impact absorption unit 12 from a retracted state to a protruding state when activating the impact absorption unit 12.

[0056] Next, based on Figures 3A to 6B The operation of the impact absorption device 10 in this embodiment will be explained. Figures 3A to 4B This shows the state of the impact-absorbing section 12 during the transition from the retracted state to the protruding state. Figure 3A and Figure 3B This is a perspective view schematically showing the appearance of the impact absorption device 10. Figure 4A and Figure 4B This is a schematic top view showing the appearance of the impact absorption device 10. Furthermore, Figures 5A to 6B The image shows the state in which the impact absorption section 12 has completed its transition from the retracted state to the protruding state. Figure 5A and Figure 5B This is a perspective view schematically showing the appearance of the impact absorption device 10. Figure 6A and Figure 6B This is a top view schematically showing the appearance of the impact absorption device 10. It should be noted that... Figure 3A , Figure 4A , Figure 5A as well as Figure 6A For illustrative purposes, the top plate 22 is omitted from the illustration.

[0057] like Figure 3B , Figure 4B As shown, the top plate 22 moves from its retracted state in the negative X-axis direction. This movement of the top plate 22 is achieved by a drive unit that propels the top plate 22 in the negative X-axis direction. For example, a solenoid, motor, or electromagnet can be used as the drive unit, which is connected to the connecting portion 22D on the negative X-axis side of the top plate 22 via a rope or rod. The drive unit pulls the rope or rod in the negative X-axis direction, thereby moving the top plate 22 in that direction. Furthermore, the movement of the top plate 22 rotates each fin 21 in the starting direction. This rotation of the fins in the starting direction pushes the impact-absorbing member 20, which is to be erected, upwards, thereby rotating the impact-absorbing member 20 in the starting direction of the rotation axis 20A. Figures 5A to 6B As shown, the impact-absorbing member 20 and the fin-shaped part 21 are turned into an upright position, thereby switching the impact-absorbing part 12 to a protruding state.

[0058] In addition, such as Figure 5AAs shown, the impact absorbing device 10 of this embodiment includes a limiting part 13, which restricts the rotation of the impact absorbing member 20 about the rotation axis 20A in the starting direction when it switches from a collapsed position to an upright position. In this embodiment, one impact absorbing member 20 has five rotation axes (not shown), and the limiting part 13 is disposed at the configuration position of each of the rotation axes. The limiting part 13 prevents the impact absorbing member 20 in the upright position from rotating further in the starting direction.

[0059] In addition, such as Figure 6A As shown, the fin-shaped portion 21 has an abutment portion 21B (an example of a "first abutment portion") that abuts against the impact-absorbing member 20, which is the object to be erected, when switching to an upright position. Figure 6A In the figure, the abutment portion 21B of the fin-shaped portion 21 in the first row and second column is given a reference numeral, but all fin-shaped portions 21 have an abutment portion 21B. The abutment portion 21B restricts the impact-absorbing member 20 in the standing position from rotating in the falling direction.

[0060] In addition, such as Figure 4A and Figure 6A As shown, the fin-shaped portion 21 has an abutment portion 21C (an example of a "second abutment portion") that abuts against other rows of impact-absorbing members 20 adjacent to the impact-absorbing members 20 that are intended to be erected when switching to an upright position. Figure 6A In the figure, reference numerals have been added to the abutment portion 21C of the fin-shaped portion 21 in the first row and second column, but at least the fin-shaped portions 21 in the second and third columns have abutment portions 21C.

[0061] In addition, such as Figure 4A and Figure 6A As shown, the impact-absorbing member 20 has a groove 20B that suppresses interference with the contact portion 21C of the fin 21 during the transition of the fin 21 from a collapsed to an upright position. The groove 20B and each contact portion 21C are formed on the side of the impact-absorbing member corresponding to each other. The groove 20B is formed along the movement trajectory of the contact portion 21C when the fin 21 moves. Therefore, it is possible to prevent other impact-absorbing members 20 adjacent to the impact-absorbing member 20 that causes the fin 21 to stand upright by passing through the contact portion 21C of the fin 21 from being hindered from rotation by the contact portion 21C.

[0062] In addition, such as Figure 6AAs shown, the second and third column fins 21 are intermediate fins 210 (an example of an "intermediate auxiliary member") disposed between the upright impact absorbing member 20 and other columns of impact absorbing members 20 adjacent to it. When the intermediate fin 210 is in an upright position, the upright impact absorbing member 20 abuts against the contact portion 21B of the intermediate fin 210, and the other columns of impact absorbing members 20 abut against the second contact portion 21C of the intermediate fin 210. Thus, in the upright position, the intermediate fin 210 can support the upright impact absorbing member 20 and the other columns of impact absorbing members 20 adjacent to it.

[0063] In addition, such as Figure 2B , Figure 4B , Figure 6B As shown, the top plate portion 22 has a plate-shaped portion 22E formed in a generally flat manner. The plate-shaped portion 22E is a portion of the top plate portion 22 that is disposed opposite to the occupant on its surface side. The top plate portion 22 maintains the plate-shaped portion 22E parallel to the base portion 11 and is driven by the drive unit. The plate-shaped portion 22E functions as a surface that supports the occupant's body. The presence of the plate-shaped portion 22E can reduce the possibility of injury to the occupant. It should be noted that, in order to reduce the possibility of injury to the occupant, at least the plate-shaped portion 22E in the top plate portion 22 needs to be flexible.

[0064] In this embodiment of the impact-absorbing device 10, the impact-absorbing section 12 can be switched between a retracted state and a protruding state. Therefore, when not in operation, the impact-absorbing section 12 remains in the retracted state, thereby preventing its size from increasing and allowing it to be installed in a vehicle compartment or similar space. Thus, the impact-absorbing device 10 of this embodiment offers greater flexibility in its placement. Furthermore, the impact-absorbing section 12 in the impact-absorbing device 10 is flexible, so it can return to its original shape after the top plate 22 receives a passenger. Moreover, since it can switch between the protruding and retracted states, it can be reused. It should be noted that in the impact-absorbing device 10, when the drive unit operates the impact-absorbing section 12, it switches the impact-absorbing section 12 from the retracted state to the protruding state. The drive to switch the impact-absorbing section 12 from the protruding state to the retracted state can be manually operated by the passenger. Alternatively, the drive unit can also switch the impact-absorbing section 12 from the protruding state to the retracted state. For example, the drive unit may include an elastic member that applies a force to the top plate 22 in the positive direction of the X-axis. When switching from the protruding state to the retracted state, the tension of the rope (not shown) installed on the top plate 22 is released, thereby moving the top plate 22 in the positive direction of the X-axis and switching the impact absorption unit 12 to the retracted state.

[0065] Next, based on Figure 7 and Figure 8The drive control of the impact absorption device 10 will be explained. For example, when a signal indicating emergency deceleration of the vehicle or movement of the occupant is detected by a sensor or the like, the impact absorption device 10 is driven to switch the impact absorption member 20 from the retracted state to the protruding state. Figure 7 This is a block diagram of a vehicle 100 including shock absorbers 10. In this embodiment, multiple shock absorbers 10 are installed in the vehicle. For example, the number of shock absorbers 10 may be configured only to correspond to the maximum number of passengers in the vehicle 100, with one shock absorber for each passenger. Figure 7 Four shock absorption devices 10 are shown in the diagram. The functional components of one of these shock absorption devices 10 are shown representatively. Each shock absorption device 10 has a control unit 101. The control unit 101 is, for example, a microcomputer, which executes various processes by using a CPU (Central Processing Unit) (not shown) to execute programs stored in a memory unit (ROM, etc., not shown).

[0066] Furthermore, in Figure 7 The diagram also shows a sensor 103, a location information acquisition unit 104, a driving control unit 105, and a driving drive unit 106 mounted on the vehicle 100. First, these configurations related to the vehicle 100 will be described. The vehicle 100 is capable of autonomous driving, sensing its surroundings while driving on the road in an appropriate manner. It should be noted that the vehicle 100 can also be manually driven by a passenger. The sensor 103 is a unit that senses the surroundings of the vehicle 100 to acquire information necessary for autonomous driving. Typical configurations include stereo cameras, laser scanners, LIDAR (Light Detection and Ranging), and various types of radar. The information acquired by the sensor 103 is sent to the driving control unit 105, which uses it to identify obstacles, pedestrians, lanes, etc., present around the vehicle 100. In this embodiment, the sensor 103 may include a visible light camera or an infrared camera for monitoring. Furthermore, the location information acquisition unit 104 is a unit that acquires the current position of the vehicle 100, and typically includes a GPS receiver. The information acquired by the location information acquisition unit 104 is also sent to the driving control unit 105, for example, to calculate the route taken by the vehicle 100 to reach the destination using the current location of the vehicle 100, and to calculate the time required to reach the destination, etc.

[0067] The driving control unit 105 is a computer that controls the vehicle 100 based on information acquired from the sensor 103 and the position information acquisition unit 104. The driving control unit 105 is, for example, a microcomputer, which performs the various processing functions described above by executing a program stored in a memory unit (ROM (Read Only Memory), etc., not shown) using a CPU (Central Processing Unit) (not shown).

[0068] As specific examples of various processes in the driving control unit 105, the following processes can be illustrated: processing for generating a driving plan for the vehicle 100; processing for detecting prescribed data about the surroundings of the vehicle 100 required for autonomous driving based on data acquired by the sensor 103; and processing for generating control commands for controlling autonomous driving based on the driving plan, prescribed data, and location information of the vehicle 100 acquired by the location information acquisition unit 104. The driving plan generation process refers to determining the driving path from the starting point to the destination. Furthermore, the prescribed data detection process includes, for example, detecting the following: the number and location of lanes; the number and location of other vehicles present around the vehicle 100; the number and location of obstacles (e.g., pedestrians, bicycles, structures, buildings, etc.) present around the vehicle 100; the road structure; road signs, etc. In addition, the aforementioned control commands are sent to the driving drive unit 106, which will be described later. Regarding the method for generating control commands for enabling the vehicle 100 to drive autonomously, known methods can be used.

[0069] The driving unit 106 is a unit that drives the vehicle 100 based on control commands generated by the driving control unit 105. The driving unit 106 is configured to include, for example, a motor for driving the wheels; an engine; an inverter; a brake; a steering mechanism, etc. The motor, brake, etc. are driven according to control commands to realize the autonomous driving of the vehicle 100.

[0070] Next, based on Figure 8 The details of the drive control are explained. Figure 8 This is a flowchart related to the processing performed by the control unit 101. It should be noted that this processing is repeatedly executed by the control unit 101 at predetermined intervals. First, in S101, the control unit 101 acquires various information. This information is then sent from the driving control unit 105.

[0071] Next, in S102, the control unit 101 determines whether drive control is needed. If it is determined that the various information obtained in S101 includes information indicating emergency deceleration of the vehicle 100, the control unit 101 determines that drive control is needed.

[0072] When it is determined in S102 that drive control is required, the control unit 101 executes the processing in S103. In S103, the control unit 101 executes drive control. For example, the drive unit 102 is configured with a solenoid, motor, electromagnet, etc., and drives the top plate 22. As a result, the impact absorption device 10 of this embodiment can switch the impact absorption unit 12 from the retracted state to the protruding state.

[0073] <Implementation Method 2>

[0074] Next, based on Figure 9 and Figure 10 The impact absorption device 50 of Embodiment 2 will be described. The impact absorption device 50 of this embodiment is the same as the impact absorption device 10 of Embodiment 1 described above, and is exemplified as a device for protecting passengers of a vehicle. Figure 9 and Figure 10 This is a perspective view of the impact-absorbing device 50 according to this embodiment. Like the impact-absorbing device 10 of Embodiment 1 described above, the impact-absorbing device 50 of this embodiment is installed on a vehicle-forming object to protect occupants during operation. The impact-absorbing device 50 includes a base 51 fixed to the object being installed. In this embodiment, the base 51 forms part of the lining of the vehicle compartment. Furthermore, the impact-absorbing device 50 includes a plurality of (16 in this example) impact-absorbing parts 52, which are installed on the base 51 in a reversible manner, switching between a retracted state (receding from the vehicle compartment to the base 51 side) and a protruding state (protruding from the base 51 towards the vehicle compartment side). The impact-absorbing parts 52 are flexible. A plurality of holes 53 are formed on the mounting surface 51A of the base 51, and each of the plurality of impact-absorbing parts 52 is disposed in each of the plurality of holes 53. In the figure, the impact-absorbing parts 52 are shown in shaded condition. In this embodiment, the mounting surface 51A forms the lining of the interior of the vehicle compartment, and the shock-absorbing portion 52 is configured to protrude from the opening 53 toward the occupant of the vehicle. For example, the shock-absorbing portion 52 may be made of flexible silicone rubber widely disposed under the mounting surface 51A.

[0075] exist Figure 9 In the shown state, the shock-absorbing section 52 is in a retracted state. In the retracted state, the shock-absorbing section 52 is housed inside the hole 53. In this embodiment, the shock-absorbing section 52 is, for example, a bag that expands by the inflow of a fluid such as compressed gas. Therefore, the drive unit switches the shock-absorbing section 52 to a protruding state by allowing compressed gas or a specified liquid to flow into the shock-absorbing section 52. Examples of drive units include compressors and pumps operated by a vehicle's engine, battery, or other drive source. For example, when the drive unit is a compressor, the compressor stores a fixed amount of specified pressure in a pressurized bottle when the vehicle's drive source is on, and can repeatedly supply compressed gas to the shock-absorbing section 52.

[0076] exist Figure 10 In the shown state, the impact absorption section 52 is in a protruding state. In this protruding state, the impact absorption section 52 protrudes from the hole 53. The drive unit switches to the protruding state by supplying fluid into the interior of the impact absorption section, causing the impact absorption section 52 to expand. It should be noted that the drive unit in this embodiment is the same as in the above embodiment, and of course, it can also be... Figure 7 The control unit 101 shown controls this. Furthermore, the drive unit can switch the shock absorption unit 52 from a protruding state to a retracted state. In this case, for example, the drive unit removes compressed gas or liquid from the shock absorption unit 52.

[0077] According to the impact absorption device 50 of this embodiment, the impact absorption section 52 can reversibly switch between a retracted state and a protruding state, and therefore can be installed in a vehicle compartment. Thus, the degree of freedom in the installation of the impact absorption device 50 of this embodiment is increased.

[0078] Furthermore, in this embodiment, the impact-absorbing portion 52 in its protruding state is cylindrical and filled with fluid, thus reducing the impact on the occupant even if they collide with it. Therefore, the impact-absorbing device 50 of this embodiment can protect the occupant.

[0079] <Other Implementation Methods>

[0080] The embodiments of this disclosure have been described above, but the various embodiments described above can be combined as much as possible.

[0081] Furthermore, in Embodiment 1, the top plate portion 22 is formed as a single unit by connecting portions 22A, 22B, and 22C to each other using connecting portion 22D. However, it is also possible that the connecting portions 22A, 22B, and 22C are not connected to each other, and each of the connecting portions 22A, 22B, and 22C is driven by a driving portion. In this case, the impact absorption device 10 has multiple driving force transmission members. It should be noted that it is also possible that the driving portion drives the fin portion 21 without providing driving force transmission members.

[0082] Furthermore, even in the absence of a collision, the impact-absorbing devices of Embodiments 1 and 2 can operate to prevent collisions between occupants and vehicle structures caused by emergency braking. Therefore, the impact-absorbing devices of Embodiments 1 and 2 can operate every time the vehicle brakes suddenly. It should be noted that the impact-absorbing devices of Embodiments 1 and 2 can be installed in any part of the vehicle. For example, if inside the vehicle, these impact-absorbing devices can be installed on the lower panel of the dashboard covering the steering column to protect the driver's seat occupant, on the back of the front seat back to protect the rear seat occupant, or inside the seat back to prevent the occupant from sinking. Furthermore, these impact-absorbing devices can also be installed outside the vehicle to protect the occupants in the event of a collision with obstacles or other vehicles on the road.

[0083] The various schemes disclosed in this specification can be combined with any other features disclosed in this specification.

[0084] Explanation of reference numerals in the attached figures

[0085] 10, 50: Impact absorption device;

[0086] 11, 51: Base;

[0087] 12, 52: Impact absorption section;

[0088] 13: Restriction section;

[0089] 20: Impact absorbing components;

[0090] 20A, 21A: Rotating shafts;

[0091] 20B: Groove section;

[0092] 21: Fin-like part;

[0093] 21B, 21C: Abutment section;

[0094] 51A: Setting surface;

[0095] 53: Hole;

[0096] 100: Vehicles;

[0097] 101: Control Department;

[0098] 102: Drive unit;

[0099] 103: Sensor;

[0100] 104: Location Information Acquisition Department;

[0101] 105: Driving control unit;

[0102] 106: Driving and propulsion unit.

Claims

1. An impact-absorbing device, installed on an object constituting a vehicle, to mitigate impacts during operation, wherein, The impact absorption device comprises: The base is fixed to the object being installed; The impact-absorbing part is flexible and is mounted on the base in a manner that allows it to reversibly switch between a retracted state that is recessed to the base side and a protruding state that is protruding from the base. and The drive unit drives the impact absorption unit to reversibly switch between the retracted state and the protruding state. When the drive unit activates the impact absorption unit, it switches the impact absorption unit from the retracted state to the protruding state at least once. The impact absorption section includes multiple rows of impact absorption members, which are rotatably mounted on multiple first rotating shafts. The multiple first rotating shafts extend relative to the base in a first direction and are spaced apart in a direction orthogonal to the first direction.

2. The impact absorption device according to claim 1, wherein, Each of the multiple rows of impact-absorbing components maintains a collapsed posture along the mounting surface in the stowed state. When switching from the retracted state to the protruding state, each of the multiple rows of impact-absorbing members is rotated in a predetermined starting direction centered on the first rotation axis, thus switching from the collapsed posture to an upright posture standing up from the mounting surface. When switching from the protruding state to the retracted state, each of the multiple rows of impact-absorbing members switches from the standing posture to the lying posture by being rotated in a direction opposite to the starting direction centered on the first rotation axis.

3. The impact absorption device according to claim 2, wherein, The device includes a limiting part that restricts the rotation of the impact-absorbing member about the first rotation axis in the starting direction when the member switches from the collapsed position to the standing position.

4. The impact absorption device according to claim 3, wherein, The impact-absorbing part further includes multiple auxiliary components. These auxiliary components are flexible components that allow the impact-absorbing part to stand upright. They are mounted on the mounting surface in a manner that allows free rotation about a second rotation axis intersecting the first rotation axis. In the folded state, each of the plurality of auxiliary components maintains a folded posture along the mounting surface such that it covers at least a portion of the auxiliary component from above, which is part of the impact-absorbing component that is to be erected. When switching from the retracted state to the protruding state, each of the plurality of auxiliary components is rotated in a predetermined starting direction centered on the second rotation axis, thereby switching from the prone position to the upright position. When switching from the protruding state to the retracted state, each of the plurality of auxiliary components switches from the standing posture to the lying posture by being rotated in the lying direction, which is opposite to the starting direction centered on the second rotation axis. When the auxiliary component switches from the lying position to the standing position, the impact absorbing component, which is the object to be stood up, is pushed up, causing the impact absorbing component to rotate in the starting direction of the first rotation axis.

5. The impact absorption device according to claim 4, wherein, The auxiliary member has a first contact portion that abuts against the impact-absorbing member, which is the object to be stood up, when switching to the standing posture, thereby restricting the impact-absorbing member from rotating in the direction of falling over.

6. The impact absorption device according to claim 5, wherein, The auxiliary member has a second abutting portion that abuts against the impact-absorbing members in other columns adjacent to the impact-absorbing members that are the objects to be erected when switching to the standing posture.

7. The impact absorption device according to claim 6, wherein, The angle between the first rotation axis and the second rotation axis is an acute angle. The impact-absorbing member has a groove that suppresses interference with the second contact portion of the auxiliary member during the process of the auxiliary member switching from the lying position to the standing position.

8. The impact absorption device according to claim 6 or 7, wherein, At least a portion of the plurality of auxiliary components are intermediate auxiliary components disposed between the impact-absorbing components of the erected object and other columns of impact-absorbing components adjacent to the impact-absorbing components. In the upright position, the first abutting portion of the intermediate auxiliary member abuts against the impact absorbing member of the upright object, and the second abutting portion of the intermediate auxiliary member abuts against the impact absorbing members of the other columns.

9. The impact absorption device according to any one of claims 4 to 7, wherein, The impact-absorbing part further includes one or more driving force transmission members driven by the driving part, the one or more driving force transmission members being connected to the auxiliary member, and at least a portion of them being flexible. When the drive unit activates the impact absorption unit, the drive force transmission member is driven, thereby switching the auxiliary member from the lying posture to the standing posture, and the impact absorption member, attached to the auxiliary member, switches from the lying posture to the standing posture.

10. The impact absorption device according to claim 9, wherein, The impact absorption section includes a single driving force transmission member, on which the plurality of auxiliary members are connected.

11. The impact absorption device according to claim 9, wherein, The driving force transmission member has a plate-shaped portion, which is kept parallel to the setting surface and is driven by the driving part.

12. The impact absorption device according to claim 7, wherein, The grooves are formed on each side of the impact-absorbing member. The groove is formed along the movement trajectory of the second abutment portion when the auxiliary member moves.

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