JP2009137507A - Hinge structure of vehicle hood flip-up device - Google Patents

Abstract

To provide a hinge structure of a hood flip-up device for a vehicle, which can support the hood so that it can be flipped up with a simple structure and can reduce the cost.
A first hinge arm 23 pivotally supported at one end on a vehicle body side and a rear side of a hood are fixed and pivotally supported on the other end side of the first hinge arm 23. The second hinge arm 25 includes a contact portion 26a that comes into contact with the first hinge arm 23, and a jumping portion 26b that is flipped up by the actuator 11. The first hinge arm 23 includes: The contact portion 26a is provided with a joint portion 27 to be joined with a predetermined joint strength. When the impact portion collides with an object to be collided, the actuator 11 separates the joint between the contact portion 26a and the joint portion 27, and the hinge pin 24 is The second hinge arm 25 can be independently rotated at the fulcrum, and the rear side of the hood is flipped up.
[Selection] Figure 4

Description

  The present invention relates to a hinge structure of a vehicle hood flip-up device.

  In recent years, in consideration of the safety of a pedestrian when colliding with a pedestrian (a collision object), a vehicle having an impact absorbing mechanism in a hood at the front of the vehicle has been developed. For example, when the pedestrian collides with the pedestrian, the rear part of the hood is lifted to secure the space in the engine room, and when the pedestrian collides with the hood, the pedestrian does not hit the hard parts such as the engine. A hood flip-up device for a vehicle that reduces the impact of the vehicle has been proposed (Patent Documents 1 to 3).

Japanese Patent Laid-Open No. 10-119823 JP 2001-018843 A JP 2005-059799 A

  The hinge structure in the vehicle hood flip-up device supports the hood so that the hood can be opened and closed with the hinge structure as a fulcrum when the hood is opened and closed, and when the vehicle is running, there is no rattling with the latch structure provided on the front bumper. It is necessary to hold the hood. On the other hand, this hinge structure has a structure in which the rear part of the hood can be flipped up by an actuator by releasing the lock mechanism in the hinge structure at the time of collision with a pedestrian. For this reason, the hinge structure including this lock mechanism has a complicated structure.

  For example, in Patent Document 1 (see FIGS. 3 and 8 of Patent Document 1), as a lock mechanism, a support pin (23), a restraint portion (32) for restraining the support pin (23), and a restraint portion (32). It is necessary to add a tension spring (50) or the like for urging the pin lock member (40) in FIG. 1, and the number of parts is increased and the structure is complicated. Further, as the locking mechanism, in the cited document 2 (see FIGS. 2 to 4 etc. of the cited document 2), the link temporary fixing tool (50) is required, and also in the cited document 3 (FIG. 5 of the cited document 3 etc.) Reference) and blocking part (5b, 6) are required, and it is necessary to attach dedicated parts separately, and the number of parts is increased as in Patent Document 1, and further, during normal times (when the hood is opened and closed, the vehicle travels) In order to reliably support the rear part of the hood without rattling, high production accuracy and mounting accuracy were required.

  Thus, in the conventional hinge structure of the hood flip-up device for a vehicle, since the lock mechanism is provided, the number of parts increases, the structure becomes complicated, and the cost increases. In addition, if the manufacturing accuracy and mounting accuracy are poor, the locking mechanism may be rattled, and as a result, there may be rattling or abnormal noise in the hood during normal times (when the hood is opened or closed, when the vehicle is running).

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a hinge structure for a vehicle hood flip-up device that can support the hood so as to be flipped up with a simple structure and can reduce the cost.

The hinge structure of the vehicle hood flip-up device according to the first invention for solving the above-mentioned problems is as follows.
A vehicle that supports the hood so that it can be opened and closed on the rear side of the hood provided at the front of the vehicle, and that allows the rear side of the hood to be flipped up by an actuator when the vehicle collides with a collision object. The hinge structure of the hood flip-up device for
The hinge structure is
A first rotating member, one end of which is pivotally supported on the vehicle body side;
A rear side of the hood is fixed, and a second rotating member pivotally supported on the other end of the first rotating member;
The second rotating member is flipped up by the actuator when a contact portion that contacts the first rotating member when the hood is supported to be openable and the vehicle collides with the object to be collided. With a jumping top,
The first rotating member includes a joint portion joined to the contact portion with a predetermined joint strength,
When opening and closing the hood, the first rotating member and the second rotating member are integrally rotated by joining the contact portion and the joint portion,
When the vehicle and the colliding object collide, the jumping portion is pressed by the actuator, the contact portion is peeled off from the joint with the joint portion, and the second rotating member is It is rotated independently from one rotating member, and the rear side of the hood is flipped up.

  The predetermined joint strength between the contact portion and the joint portion is not peeled off at normal times (when the hood is opened and closed, when the vehicle is running), and the vehicle collides with the impacted object, and the actuator For the first time, the joint portion is peeled off when is operated.

The hinge structure of the hood flip-up device for a vehicle according to the second invention for solving the above problem is as follows:
In the hinge structure of the vehicle hood flip-up device according to the first invention,
A surface where the contact portion and the joint portion are joined is formed so as to be substantially horizontal when the hood is closed, and the joint portion is joined to the lower surface of the contact portion.

The hinge structure of the hood flip-up device for a vehicle according to the third invention for solving the above-mentioned problem is as follows.
In the hinge structure of the vehicle hood flip-up device according to the first or second invention,
The surface where the contact portion and the joint portion are joined is formed so as to be substantially perpendicular to the hood jumping direction by the actuator, and the joint portion is joined to the lower surface of the contact portion. To do.

The hinge structure of the hood flip-up device for a vehicle according to the fourth invention for solving the above-mentioned problem is as follows.
In the hinge structure of the vehicle hood flip-up device according to any one of the first to third inventions,
The second rotating member includes a plurality of hood fixing portions to which a rear side of the hood is fixed,
The contact portion and the jumping portion are disposed at a position sandwiched between the hood fixing portions.

The hinge structure of the vehicle hood flip-up device according to the fifth invention for solving the above-mentioned problems is
In the hinge structure of the vehicle hood flip-up device according to any one of the first to fourth inventions,
Furthermore, one end is pivotally supported on the pivotal support portion on the vehicle body side, and the other end is connected to the second rotating member so as to be able to regulate the amount of movement of the second rotating member. It is characterized by having.

  According to the first invention, when the joint portion on the first rotating member side and the contact portion on the second rotating member side are joined with a predetermined joining strength, the vehicle and the colliding object collide. The joint is peeled off by the actuator, the second rotating member is independently rotated, and the rear side of the hood is flipped up, so that the number of parts is not increased and the structure is not complicated. The hinge structure can support the hood so that it can be flipped up with a simple structure. As a result, the cost can be reduced. In addition, since the contact portion and the joint portion are joined to function as a lock mechanism, the contact portion and the joint portion are securely locked, and no rattling or abnormal noise is generated when the hood is opened or closed or when the vehicle is traveling. .

  According to the second invention, since the joint surface between the contact portion and the joint portion is formed to be substantially horizontal when the hood is closed, the joint surface between the contact portion and the joint portion is the lower surface of the contact portion. Thus, the bonding strength can be set without being affected by the weight of the hood. In other words, when the joint surface is the side surface of the contact portion, the weight of the hood acts in the shear direction of the joint surface (in the direction parallel to the joint surface). For example, since the weight of the hood acts in a substantially vertical direction with respect to the joint surface, the contact portion and the joint portion are pressed against each other, and it is not necessary to consider shear peeling that dissociates the joint surface. Moreover, even when the hood is closed with an excessive force, the contact portion and the joint portion are pressed against each other, and an excessive force does not work in the direction of dissociating the joint surface. There is no loss of reliability.

  According to the third invention, since the joint surface between the contact portion and the joint portion is formed to be substantially perpendicular to the hood jumping direction, the jumping force by the actuator acts directly as a peeling force. In addition, when the hood is jumped up, the joint between the contact portion and the joint portion is reliably peeled off, and the reliability as the jumping-up hinge structure can be improved.

  According to the fourth invention, since the contact portion and the jumping portion are disposed at a position sandwiched between the hood fixing portions, the contact portion and the jumping portion are close to each other, and the jumping force of the actuator is joined to the contact portion. It can be made to act efficiently as a peeling force for bonding with the part.

  According to the fifth aspect of the present invention, the connecting member that regulates the amount of movement of the second rotating member is provided in connection with the shaft support portion on the vehicle body side and the second rotating member. Thus, it is possible to appropriately secure a space for absorbing the shock.

  Hereinafter, a hinge structure of a vehicle hood flip-up device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view illustrating an outline of a vehicle hood flip-up device according to the present invention.
An engine room 2 is disposed at the front of the vehicle body of the vehicle 1, and a front hood (hood) 3 is provided on the upper surface of the engine room 2. A front bumper 4 extending in the vehicle width direction is provided below the front end of the vehicle 1.

  The front hood 3 is supported by the hood hinges 5 and 6 (hinge structure) provided on both sides in the vehicle width direction on the rear side so as to be opened and closed. When the front hood 3 is opened, The front end side of the front hood 3 is configured to open upward with 6 as a fulcrum. On the other hand, when the front hood 3 is closed, the striker 7 provided at the front end of the front hood 3 is fixed by the latch 8 provided on the vehicle body corresponding to the position of the striker 7, so that the vehicle is traveling. Also, the front hood 3 is securely held without rattling.

  An impact sensor 9 capable of detecting a collision with a pedestrian (a collision object) is provided in the front bumper 4. The impact sensor 9 is electrically connected to an ECU 10 (Electronics Control Unit) provided in the vehicle 1 together with various sensors such as a vehicle speed sensor (not shown) and various devices such as an actuator 11 described later. The ECU 10 controls various devices based on information from various sensors.

  In the vehicle hood flip-up device according to the present invention, when the ECU 10 detects a collision with a pedestrian by the impact sensor 9 when the vehicle is traveling at a predetermined vehicle speed or higher, an actuator 11 described later is operated. The rear side of the front hood 3 is flipped up to secure a space in the engine room 2 so that when the pedestrian collides with the front hood 3, it does not hit the hard parts such as the engine. The impact is reduced.

  In this way, the hood hinges 5 and 6 support the front hood 3 without rattling during normal times (when the hood is opened or closed, when the vehicle is running), and the front hood 3 is flipped up in the event of a collision with a pedestrian. It needs to be possible. Therefore, a hinge structure according to the present invention having these functions using a simple structure is shown in FIGS. 2 to 5 and the configuration and operation thereof will be described in detail.

  2 to 5 are views showing a hinge structure and an actuator according to the present invention. FIG. 2 is a perspective view when the front hood is closed. FIG. 3 is a perspective view when the front hood is opened. 4 is a perspective view at the time of collision, and FIG. 5 is a schematic diagram for explaining the movement of each member of the hinge structure before and after the collision. In the figure, “Fr” indicates the vehicle front direction.

  2 to 4 show a state in which the hood hinge 5 provided on the left side of the vehicle is viewed from the inside of the vehicle, the hood hinge 6 provided on the right side of the vehicle has the same configuration. Therefore, illustration and description of the hood hinge 6 are omitted here.

  The actuator 11 includes a cylindrical cylindrical portion 12, a rod-shaped piston 13 provided in the cylindrical portion 12 and extending in the same direction as the cylindrical portion 12, and an explosive inflator 14 disposed below the piston 13. And have.

  The actuator 11 is fixed on the vehicle body side (inside the vehicle width direction of the front fender) in the vicinity of the hood hinge 5 with the vertical direction of the vehicle as the axial direction, and responds to a signal from the ECU 10 in the event of a collision with a pedestrian. Thus, the inflator 14 is operated, the piston 13 is pushed upward, and the rear side of the front hood 3 is flipped up. As described above, the actuator 11 is for raising the rear side of the front hood 3. However, in the present invention, the function of releasing the lock mechanism in the present invention to be described later using the pushing force of the actuator 11 is also used. Plays.

  In this embodiment, a piston type actuator is shown as the actuator, but other actuators such as a cylindrical airbag type actuator can also be used.

  The hood hinge 5 includes a hinge base 21 fixed to the vehicle body side, and a first hinge arm 23 (first rotation member) whose one end is pivotally supported by a hinge center pin 22 on the hinge base 21 on the vehicle body side. ), And the rear side of the front hood 3 is fixed by the hood fixing portion 26c, and the second hinge arm 25 (second rotation) pivotally supported by the hinge pin 24 on the other end side of the first hinge arm 23. The second hinge arm 25 further has a contact portion 26a that comes into contact with the first hinge arm 23 when the front hood 3 is supported to be opened and closed, and the vehicle 1 and a pedestrian collide with each other. The first hinge arm 23 includes a joint portion 27 that is joined to the lower surface of the contact portion 26a with a predetermined joint strength. That.

In the present embodiment, the hood bracket portion 26 in which the contact portion 26a, the jumping portion 26b, and the hood fixing portion 26c to which the rear side of the front hood 3 is fixed is integrally formed with the second hinge arm 25. Although the case where it is provided will be described, the contact portion 26a, the jumping portion 26b, and the hood fixing portion 26c may not be integrated as the hood bracket portion 26, but may be provided in separate positions on the second hinge arm 25 as separate portions. Good.
Moreover, it is good also as a structure attached to the 2nd hinge arm 25 by making the hood bracket part 26 into a separate part from the 2nd hinge arm 25 as a hood bracket member.
In addition, the contact portion 26a, the jumping portion 26b, and the hood fixing portion 26c are separate parts from the second hinge arm 25 as contact bracket members, jumping bracket members, and hood fixing bracket members. It is good also as a structure attached to.

  Further, the hood fixing part 26c is arranged in two places in the vehicle front-rear direction, and a contact part 26a and a jumping part 26b are arranged therebetween. That is, the contact portion 26a and the jumping portion 26b are disposed at a position sandwiched between the hood fixing portions 26c. The contact portion 26a and the jumping portion 26b are sandwiched by the hood fixing portion 26c and are close to each other.

  Further, one end is pivotally supported by a hinge center pin 22 that is pivotally supported on the vehicle body 1 side, the movement amount of the second hinge arm 25 can be regulated, and the other end is a second hinge arm. A stopper link 28 (connecting member) connected to 25 is also provided. A slot 28a is provided along the longitudinal direction of the stopper link 28 on the second hinge arm 25 side, and a connecting pin (not shown) of the second hinge arm 25 is inserted into the slot 28a. Thus, the rotation of the second hinge arm 25 is allowed and the amount of movement is restricted within the range of the length of the long hole portion 28a.

  The hinge base 21, the first hinge arm 23, the second hinge arm 25, and the stopper link 28 are formed from flat members. The hinge base 21 is provided with fixing portions 21a and 21b for fixing to the vehicle body side by bending a flat plate-like member. And these fixing | fixed part 21a, 21b is contact | abutted to the vehicle body side, and is being fixed with the volt | bolt which is not shown in figure.

  The joint 27 provided on the first hinge arm 23 is also formed by bending a flat plate member, and is formed integrally with the first hinge arm 23. The cross section of this portion is shown in FIG. Thus, it has an L-shaped cross section. Similarly, the hood bracket portion 26 provided on the second hinge arm 25 is also formed by bending a flat plate-like member, and is formed integrally with the second hinge arm 25. As shown in FIG. The hood fixing portion 26c of the hood bracket portion 26 is in contact with the lower surface of the front hood 3 and is fixed by a bolt (not shown). And the hood bracket part 26 is arrange | positioned on the action | operation axis | shaft of the piston 13 of the actuator 11, and becomes a structure by which only the jumping part 26b is pressed on the piston 13. FIG.

  Further, the joint surface between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is formed so as to be substantially horizontal when the front hood 3 is closed, and is joined together vertically. That is, when the front hood 3 is closed, the surface of the jumping portion 26b that is flipped up by the piston 13 in the hood bracket portion 26 is formed to be a substantially horizontal surface. A surface to be joined to the contact portion 26a of the hood bracket portion 26 is formed. And at the time of joining of the contact part 26a of the hood bracket part 26 and the joint part 27, the joint part 27 is brought into contact with the lower surface of the contact part 26a of the hood bracket part 26, and these contact surfaces are at one or more joint points W. It is joined.

  Thus, when the front hood 3 is closed, the joint surface between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is joined so as to be substantially horizontal when the front hood 3 is closed. Even if it is dropped with a strong force, the input load works so that the contact portion 26a of the hood bracket portion 26 and the joint portion 27 are pressed against each other, and the contact portion 26a of the hood bracket portion 26 is joined. Since an excessive load is not applied in a direction in which the portion 27 is peeled off, the contact portion 26a of the hood bracket portion 26 and the joint portion 27 are not peeled except when the piston 13 is bounced up. The reliability of the joint portion can be ensured.

  The joint strength between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is not peeled and broken during normal times (when the hood is opened and closed, when the vehicle travels), and the vehicle 1 and the object to be collided Only when the actuator 11 is actuated due to a collision, the joining portion is peeled and fractured for the first time. That is, the joint strength between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is F1, and the force acting on the joint portion between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 by the actuator 11 is applied. When F2 is set, the bonding strength of the bonding portion is set so that F1 <F2.

  Further, since the joint surface between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is formed to be a substantially horizontal surface when the front hood 3 is closed, the joint surface is sheared with respect to the shear direction of the joint surface. The influence of the input due to the weight of the front hood 3 or the vertical vibration of the front hood 3 can be minimized.

  In addition, as a joining method, for example, the contact surfaces are spot-joined at one or more locations using welding joint such as projection welding or spot welding or rivet joint such as SPR (self-piercing rivet). The bonding strength can be set to a desired strength by appropriately selecting the bonding position, the number of bondings, and the like, for example.

  Further, in the hood bracket portion 26, the surface of the upper portion 26 b that is jumped up by the piston 13 of the actuator 11 is formed in a direction perpendicular to the rotational direction of the second hinge arm 25, and the contact portion 26 a and the joint portion 27. Is also formed in a direction perpendicular to the rotational direction of the second hinge arm 25. That is, it is formed in a direction substantially perpendicular to the front hood jumping direction. Therefore, the pushing force of the piston 13 can be efficiently used for peeling and breaking of the joint surface between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 and for flipping up the front hood 3.

  And in the hood hinge 5 of the said structure, the contact part 26a and the junction part 27 of the hood bracket part 26 which were mutually joined by predetermined joining strength comprise a locking mechanism. On the other hand, when releasing the lock mechanism, the piston 13 of the actuator 11 is pressed only against the jumping portion 26b of the hood bracket portion 26, and the joint portion between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is By releasing and breaking due to the pushing force, the lock mechanism is released.

  Further, since the contact portion 26a and the jumping portion 26b are disposed at a position sandwiched by the hood fixing portion 26c, the joining portion between the contact portion 26a and the joining portion 27 and the jumping portion 26b are pressed against the piston 13. The pressing portion comes close, and the pushing-up force of the pressing portion by the actuator 11 and the piston 13 acts efficiently as the peeling force of the joint portion.

  Here, with reference to FIG. 2 to FIG. 5, the state of the hood hinge 5 at the normal time (when the hood is opened and closed, when the vehicle is running) and the state of the hood hinge 5 at the time of collision are explained, and the movement of each member is explained. To do.

  In the hood hinge 5 having the above configuration, as shown in FIG. 5A, the contact between the contact portion 26a of the hood bracket portion 26 and the joint portion 27 is maintained unless a collision with a pedestrian occurs. For this reason, the first hinge arm 23, the second hinge arm 25, and the stopper link 28 function as a linear integrated member, and are in the same state as a normal single hinge arm. Therefore, when the front hood 3 is opened and closed, as shown in FIGS. 2 and 3, the hinge center pin 22 that is pivotally supported on the vehicle body side with respect to the hinge base 21 is used together with the first hinge arm 23 as a fulcrum. The front hood 3 is opened and closed by rotating the second hinge arm 25 and the stopper link 28.

  On the other hand, when the vehicle 1 travels at a predetermined vehicle speed or higher and the vehicle 1 and the pedestrian collide, and the impact sensor 9 detects a collision with the pedestrian, a predetermined signal is sent from the ECU 10 to the actuator 1. Sent. Upon receiving the signal, the actuator 11 operates the inflator 14 to push the piston 13 upward. The pushing force by the piston 13 is basically for flipping up the rear side of the front hood 3, but in the present invention, this pushing force is used, as shown in FIG. In the present invention, the hood bracket portion 26 is pressed only against the jumping portion 26b, and the rear side of the front hood 3 is flipped up, and at the same time, the joint portion between the contact portion 26a and the joint portion 27 of the hood bracket portion 26 is peeled and broken. The lock mechanism is released. As a result, the second hinge arm 25 and the stopper link 28 can rotate independently of the first hinge arm 23.

  As the piston 13 moves upward, as shown in FIG. 4, the first hinge arm 23 and the stopper link 28 rotate with respect to the hinge base 21, and with respect to the rotated first hinge arm 23. Thus, the second hinge arm 25 rotates independently of the first hinge arm 23, with the hinge pin 24 that is pivotally supported on the first hinge arm 23 side as a fulcrum. As a result, the first hinge arm 23, the second hinge arm 25, and the stopper link 28, which were originally linear and integral members, are triangular with the connecting portion of the second hinge arm 25 and the stopper link 28 as a vertex. It will change to the structure. At this time, since the striker 7 at the front end of the front hood 3 is held by the latch 8, the rear portion of the front hood 3 fixed to the hood fixing portion 26 c of the hood bracket portion 26 jumps up with the striker 7 and the latch 8 as fulcrums. Will be.

  As described above, the hood hinge 5 having the above-described configuration has a structure that allows the rear portion of the front hood 3 to be flipped up, but does not require a complicated structure for locking, and it is necessary to add a dedicated component separately. Therefore, it is possible to reduce the number of parts to make a simple structure and to reduce the cost. Further, since it is securely locked by welding or the like, no rattling or abnormal noise is generated when the hood is opened and closed or when the vehicle is running.

  The hinge structure according to the present invention is applied to a hood flip-up device for a vehicle, and is particularly suitable for a vehicle having a low front hood position (for example, a sports car).

It is a perspective view explaining the outline of the hood flip-up device for vehicles in the present invention. It is a perspective view of the hinge structure and actuator which concern on this invention when a front hood is closed. It is a perspective view of the hinge structure and actuator which concern on this invention when a front hood is opened. It is a perspective view of the hinge structure and actuator which concern on this invention at the time of a collision. It is a schematic diagram explaining the movement of each member of the hinge structure according to the present invention before and after the collision.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Front hood 5 Hood hinge 6 Hood hinge 11 Actuator 21 Hinge base 22 Hinge center pin 23 1st hinge arm 24 Hinge pin 25 2nd hinge arm 26 Hood bracket part 26a Contact part 26b Jump upper part 26c Hood fixing part 27 Joint part 28 Stopper link

Claims (5)

A vehicle that supports the hood so that it can be opened and closed on the rear side of the hood provided at the front of the vehicle, and that allows the rear side of the hood to be flipped up by an actuator when the vehicle collides with a collision object. The hinge structure of the hood flip-up device for
The hinge structure is
A first rotating member, one end of which is pivotally supported on the vehicle body side;
A rear side of the hood is fixed, and a second rotating member pivotally supported on the other end of the first rotating member;
The second rotating member is flipped up by the actuator when a contact portion that contacts the first rotating member when the hood is supported to be openable and the vehicle collides with the object to be collided. With a jumping top,
The first rotating member includes a joint portion joined to the contact portion with a predetermined joint strength,
When opening and closing the hood, the first rotating member and the second rotating member are integrally rotated by joining the contact portion and the joint portion,
When the vehicle and the colliding object collide, the jumping portion is pressed by the actuator, the contact portion is peeled off from the joint with the joint portion, and the second rotating member is 1. A hinge structure for a vehicle hood flip-up device, wherein the hood is flipped up independently of one rotating member and the rear side of the hood is flipped up. In the hinge structure of the vehicle hood flip-up device according to claim 1,
A surface for joining the contact portion and the joint portion is formed so as to be substantially horizontal when the hood is closed, and the joint portion is joined to a lower surface of the contact portion. Hinge structure of hood flip-up device. In the hinge structure of the vehicle hood flip-up device according to claim 1 or 2,
The surface where the contact portion and the joint portion are joined is formed so as to be substantially perpendicular to the hood jumping direction by the actuator, and the joint portion is joined to the lower surface of the contact portion. The hinge structure of the vehicle hood flip-up device. In the hinge structure of the vehicle hood flip-up device according to any one of claims 1 to 3,
The second rotating member includes a plurality of hood fixing portions to which a rear side of the hood is fixed,
A hinge structure of a vehicle hood flip-up device, wherein the contact portion and the jumping portion are disposed at a position sandwiched between the hood fixing portions. In the hinge structure of the vehicle hood flip-up device according to any one of claims 1 to 4,
Furthermore, one end is pivotally supported on the pivotal support portion on the vehicle body side, and the other end is connected to the second rotating member so as to be able to regulate the amount of movement of the second rotating member. A hinge structure for a vehicle hood flip-up device.

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