KR20040094193A - Dual bumper for protecting a walker - Google Patents

Abstract

PURPOSE: A dual bumper for protecting a walker is provided to protect the walker and a vehicle body by forming the front face of the bumper with soft material and interposing an elastic member and a buffer between a bumper body and the vehicle body. CONSTITUTION: A dual bumper for protecting a walker is composed of a walker protecting unit having a bumper body(10) and a space(15) containing a shock absorbing member(20), a shock buffering unit having an elastic member(30) and a buffer(40), and a bumper fixing unit(60). The bumper body includes coupling units(13,14) contacting with contact portions(51a,51b) in a vehicle frame(50), and a bumped portion(12) made of soft material. The buffer and the elastic member are interposed between the shock absorbing member and the vehicle frame. The bumper fixing unit presses the coupling units and fixing protrusions(32) formed at the elastic member, and fixes the bumper body to the front of the vehicle frame.

Description

Pedestrian-friendly double bumper {Dual bumper for protecting a walker}

The present invention relates to a pedestrian-friendly bumper that absorbs the impact force applied to the pedestrian and the vehicle in a double, in particular, by molding the front surface of the pedestrian-friendly bumper with a soft material to protect the pedestrian as well as to incorporate a shock absorbing means in the bumper A pedestrian-friendly double bumper adapted to protect a body or occupant.

In general, the bumper is provided in the front and rear of the body of the vehicle to buffer the load generated during the collision with the external object to prevent damage to the vehicle body as well as to protect the occupant, such a bumper at the speed of 2.5 miles It is regulated to prevent damage to the body when colliding with an object.

However, the bumper is made of urethane material to protect the car body first, and its elasticity is strong. However, the bumper itself is crushed when colliding with an external object, and the bumper itself can be replaced or repaired due to sag when the body frame is bent in a small collision. There was a problem that the incident cost and the work load increases.

In addition, the repulsive force generated by the elasticity of the bumper itself during the collision of the vehicle is transmitted to the passengers and not only injuries to the neck portion, but also the bumper is formed with the same strength and hardness as a whole, so that the pedestrian may be injured even in the slightest collision. In recent years, "pedestrian-friendly bumpers" have been developed to protect pedestrians first through a cushioning member in the body and the bumper.

For example, according to the "pedestrian-friendly bumper" (Registration No. 20-2322 07) filed by the applicant of the present application, as shown in Figure 1, the receiving space 111 is formed in the body as well as outside the opening of the receiving space A bumper 110 having a locking piece 112 formed therein; An airbag 120 inserted into the accommodation space 111 to expand / contract by air pressure; It is composed of a vehicle body 130 is provided with a locking plate 112 and a locking plate 112 corresponding to the front body side.

Accordingly, when the locking piece 112 of the bumper 110 is inserted into and fixed to the locking plate 131 of the vehicle body 130 and air is injected into the air bag 120 through the air inlet 121, the air bag 120 Since the engaging piece 112 and the engaging plate 131 are in close contact with each other during the expansion, the bumper 110 is fixed to the accommodation space of the vehicle body.

By the way, the bumper 110 is formed of a rubber material has an advantage of easily absorbing the impact force with the pedestrian or the external object, but the hardness and strength of the binding portion coupled to the vehicle body 130 is weak, for example, the vehicle body 130 There was a problem in that it is difficult to maintain the bumper itself in the process of pressing the air or bolts.

At this time, since the binding portion of the bumper 110 is compressed by the fastening means, not only the outer surface of the bumper 110 is deformed, but also the thickness of the locking piece 112 is formed to prevent the deformation of the bumper 110. The weight and manufacturing cost are increased because it must be maintained.

Then, the fixing force of the bumper 110 is maintained by the air pressure of the airbag 120 or the coupling force of the locking piece 120 and the locking plate 131, for example, the airbag 120 is damaged or caught by an impact. When the locking piece 112 is separated from the plate 131, there is a problem that the function of the bumper itself may be lost.

In addition, the airbag 120 is connected to a plurality of nodes so as to bend at a radius of curvature corresponding to the vehicle body 130, and when an external force is applied to the airbag 120, a repulsive force is generated by air pressure to thereby bumper 110. Since it pushes outwards, there was a problem that the outer surface of the bumper 110 is deformed or damaged.

In addition, since the circumferential surface of the nodal part is relatively thinner than the air tube, the airbag 120 is not only deformed to push the outer surface of the bumper 110 into the nodular part, and external force is applied to the bumper 110. When losing, there was a problem that there is a fear of being damaged by the empty space of the node.

In addition, the outer surface of the bumper 110 in contact with the engaging plate 112 of the bumper 110, that is, the contact plate 131 of the vehicle body 130, is compressed to a bumpy shape, thereby deteriorating its appearance. Rather, when the airbag 120 is damaged or separated by an external shock, there is a problem in that the bumper function is lost.

Accordingly, the present invention has been made to solve the problems described above, by forming the front surface of the pedestrian-friendly bumper with a soft material to protect the pedestrians first, as well as the built-in shock absorber in the bumper body or passengers The aim is to provide a pedestrian-friendly double bumper intended for protection.

1 is a longitudinal sectional view showing a pedestrian-friendly bumper according to the prior art,

2 (a), (b) is an embodiment showing a pedestrian-friendly bumper according to the present invention,

3 is a cross-sectional view showing an exploded state of FIG. 1 according to the present invention;

4 is a perspective view showing a finger member of the pedestrian-friendly bumper according to the present invention;

5 is an exploded perspective view showing a fixing device of a pedestrian-friendly bumper according to the present invention,

6 is a cross-sectional view showing a release state of the fixing device according to the present invention;

Figure 7 is a perspective view showing a part of the installation state of the pedestrian-friendly bumper according to the present invention.

Explanation of symbols on the main parts of the drawings

10: bumper body 12: impact part

20: shock absorber 30: carbon member

32: fixing ring 34: hinge connection

40: shock absorber 50: body frame

60: fixing device 66: slide member

70,72: Crimping table

The present invention for achieving the object as described above, the bumper body consisting of the collision portion in contact with the pedestrian and the pedestrian in contact with the contact portion of the body frame, the impact portion is formed of a soft material compared to the engaging portion and the shock absorbing material in the space portion Pedestrian protection means for protecting the pedestrian through a crash; An external shock buffer that suppresses the repulsive force of the finger member by a shock absorber by interposing between the body frame and the shock absorber between the body member and the shock absorber connected to the inner member of the shock absorber through the fixing ring and the hinge connection part through the inner wall of the shock absorber. Means; It is characterized in that the configuration consisting of a bumper fixing means for fixing the bumper body on the front of the body frame by operating the pressing device for pressing the coupling portion of the bumper body and the fixing ring of the finger member by the contact portion of the body frame at the same time.

Hereinafter, an embodiment according to the present invention will be described in detail.

First, the pedestrian-friendly bumper according to the present invention, as shown in Figure 2 (a), (b) and 3, the pedestrian protection means consisting of the bumper body 10 and the shock absorber 20, and the finger member 30 And it is made of an external shock buffer means consisting of a shock absorber 40, and a bumper fixing means mounted to the vehicle body frame 50 to fix the bumper body (10).

The bumper body 10 is formed with a space portion 15 in which a shock absorber 20 is accommodated at its rear side while a collision portion 12 is formed in direct contact with a pedestrian at its front side. Upper and lower coupling portions 13 and 14 are formed in the opening communicating with 15).

At this time, the impact portion 12 is formed of a relatively soft material relative to the upper and lower coupling portions 13 and 14, and the coupling portions 13 and 14 and the impact portion 12 are integrally formed through a double injection process. Or by adhering to each other with an adhesive.

The shock absorbing material 20 is attached to the space portion 15 of the bumper body 10 or is coupled in an interference fit manner, and the coupling groove 22 into which the finger member 30 is fitted into the body front surface is coupled thereto. It is formed concave.

And, the finger member 30 is coupled to the coupling groove 22 of the shock absorber 20 to absorb the external impact of the vehicle body frame 50, as shown in Figure 4, a plurality of connected to the vehicle body frame 50 Two fixing rings 32 and a plurality of hinge connecting portions 34 connected to the shock absorber 40 are alternately installed.

Of course, the fixed ring portion 32, the front end is formed with a fixing projection (32a) that is fixed through the body frame 50.

The shock absorber 40 has a pin coupling portion 44 connected to the hinge connection portion 34 of the finger member 30 at the front side of the rod 42.

In addition, the shock absorber 40 is penetrated through the front surface of the body frame 50, the movement is restricted by the stepped portion 46 formed in the front of the body, the thread 40a on the rear surface of the stepped portion 46 It is formed so that it can be fixed to the vehicle body frame 50 via the fastener 48 which engages with the thread 40a.

And, the body frame 50, as shown in Figs. 3 and 7, the appearance is formed in an approximately H-shaped, the contact portion which is in surface contact with the engaging portions (13, 14) of the bumper body 10 on the front side of the body 51a and 51b are integrally formed.

Of course, the contact portions 51a and 51b of the vehicle body frame 50 and the contact portions 13 and 14 of the bumper body 10 may be slightly roughened.

In addition, the body frame 50 includes a first through hole 52 through which the fixing protrusion 32a of the fixing ring part 32 passes, a second through hole 54 through which the shock absorber 40 penetrates, and The third and fourth through-holes 56 and 58 to which the fixing device 60 is installed are formed, respectively. In this case, the third and fourth through holes 56 and 58 are formed in the form of long holes for inserting the fixing device 60, and the fourth through holes 58 are longer than the third through holes 56. .

In addition, the fixing device 60 is to press or fix the fixing ring portion 32 of the finger member 30 to fix or release the body frame 50, the pressing portion bent in the opposite direction relative to the main surface on the top 63 ) Is formed and the support body 64 extending in the horizontal direction in the lower portion (62), the slide member 66 for sliding the support along the main surface of the body 62 and supporting the body frame 50, and the body An extension support 64 of the 62 and a spring member 68 connected to the slide member, respectively.

At this time, the body 62 has a stopper 62a formed on the third through hole 56 of the vehicle body frame 50 at the upper portion thereof, and a coupling groove 62b at which the tool is coupled to the lower portion thereof. The pressing portion 63 of the 62 is provided with a pin connecting portion 63a at the tip, while the extension support 64 is provided with a rotation support pin 65 so as to be rotatable at the tip.

In addition, the fixing device 60 is fixed to the vehicle body frame 50 by pressing the upper and lower surfaces of the bumper body 10 and the fixing ring part 32 of the finger member 30 through the crimping pads 70 and 72. While the pressing table 70 is formed with a hinge connecting portion 70a connected to the pin connecting portion 63a of the pressing portion 63, the pressing table 72 is a rotational support installed at the tip of the extension support 64 The support part 72a which the pin 64a couples and supports is formed.

And, the pressure sensor 80 is built between the bumper body 10 and the shock absorber 20, when the external force applied to the bumper body 10 exceeds the prescribed value to operate an airbag (not shown) , The pedestrian impinges on the bumper body 10 and then performs a function to protect the pedestrians colliding with the bonnet and the front window.

That is, since the impact portion 12 of the bumper body 10 is smoothly formed, the pressure sensor 80 is quickly operated even with a small impact force with the pedestrian.

Hereinafter, the operation according to the present invention will be described.

First, referring to the operation of the fixing device 60, the body 62 is inserted into the third and fourth through holes 56 and 58 of the body frame 50, and the pressing portion 63 is inserted into the third through hole 56. ), And then the pressing portion 63 and the extension support portion 64 of the body 62 is connected to the crimp (70, 72).

Subsequently, the pressing tables 70 and 72 are disposed in a portion where the upper and lower surfaces of the bumper body 10 and the fixing ring portion 32 of the stop member 30 overlap each other, such as a lever and the like in the engaging groove 62b of the body 62. The tool is inserted and pulled clockwise.

At this time, since the rotary support pin 65 connecting the extended support 64 of the body 62 and the support 72a of the crimp 72 rotates, the body 62 moves forward of the fourth through hole 58. Moving forward, the slide member 66 is raised along the body 62, the rotary support pin 65 is supported while being slightly lowered by the elastic force of the spring member 68 after passing the maximum rotation radius.

At this time, the stopper (62a) provided in the body 62 is in close contact with the upper surface of the third through-hole 56 of the vehicle body frame 50, the pressing table (70, 72) is the upper and lower surfaces of the bumper body 10 and the support member Fixing part 32 of the 30 is pressed to the overlapped portion is to be fixed to the body frame 50.

On the other hand, when a tool such as a lever is inserted into the coupling groove 62b of the body 62 and pulled counterclockwise, the pressing table 70 connected to the pressing portion 63 and the extension support portion 64 of the body 62 is provided. Since 72 is operated in the reverse clockwise order, the upper and lower surfaces of the bumper body 10 and the fixing ring part 32 of the finger member 30 are released and are separated from the body frame 50.

As such, since the bumper body 10 and the body frame 50 are not directly coupled to each other by indirect coupling through the fixing device 60, the bumper body 10 may be fixed or released to the body frame 50 by only a simple operation using a tool. Of course, it is possible to prevent the bumper from floating or sagging in the light collision event.

That is, since the bumper is directly fixed through the fixing device in the state in which the bumper frame, which is provided in the vehicle, is removed, the weight and structure of the vehicle are simplified, and the bumper is compressed, thereby preventing sagging.

On the other hand, if a collision accident with a pedestrian occurs during the driving process of the vehicle, since the pedestrian collides with the collision part 12 of the bumper body 10, the waist or leg of the pedestrian impacts with the collision part 12 of the flexible material. Damage is minimized by the absorbent material 20.

At this time, since the impact portion 12 of the bumper body 10 is molded in a soft material, the impact portion 12 is not cracked or damaged even when colliding with an external hard object, as well as the impact absorber 20. Is restored to its original state.

In addition, when the resilience member 30 is to generate a repulsive force in a direction opposite to the external impact direction, since the repulsive force of the finger member 30 is reduced by the shock absorber 40, the repulsive impact on the vehicle is minimized to damage the vehicle body. In addition to being prevented, the occupants are protected.

In addition, since the material of the bumper body 10 is formed of a soft material, the pressure sensor 80 quickly detects the impact force of the bumper, so that the pressure sensor quickly detects even a small collision pressure with a pedestrian. It is transmitted to the pedestrian to minimize the human injury.

As described above, according to the pedestrian-friendly double bumper according to the present invention, the front surface of the pedestrian-friendly bumper is formed of a soft material to protect the pedestrian, as well as to prevent the pedestrian from being interposed between the vehicle body and the buffer member. Since the impact force is absorbed, various impact forces applied to pedestrians and vehicles are absorbed in duplicate, thereby minimizing human and physical damage.

In addition, since the strength and hardness of the binding portion of the pedestrian-friendly bumper are increased, the shape of the vehicle body is kept constant and the appearance is improved, and the bumper is indirectly fixed to the vehicle body by using the fixing device, thereby minimizing the weight of the vehicle and thus manufacturing cost. This reduction is, of course, prevents the bumper from sagging.

In addition, since the front surface of the pedestrian-friendly bumper is made of a soft material, the sensing force of the pressure sensor is sensitive, so that the airbag operates even in small collisions with the pedestrians, thereby minimizing human and physical damages, as well as the contact portion of the bumper in contact with the vehicle body. It is formed to be hard to prevent the deformation of the bumper.

Claims (4)

The bumper body 10 including the coupling parts 13 and 14 which are in surface contact with the contact parts 51a and 51b of the body frame 50 and the collision part 12 which is in contact with the pedestrian is compared with the coupling parts 13 and 14. Pedestrian protection means for molding the impact portion 12 into a soft material and the built-in shock absorber 20 in the space portion 15 to protect the pedestrian through the impact portion 12; The body of the shock absorbing member 20, which is inserted into the coupling groove 22 of the shock absorbing material 20, and the shock absorber 40 connected to the inner wall of the support member 30 via the fixing ring portion 32 and the hinge connecting portion 34 as a vehicle body. External impact buffer means for intervening between the frame 50 and the shock absorber 20 to suppress the repulsive force of the finger member 30 with the shock absorber 40; Operate the fixing device 60 which presses the coupling part 13 and 14 of the bumper body 10 and the fixing ring part 32 of the finger member 30 to the contact parts 51a and 51b of the body frame 50. Bumper fixing means for fixing the bumper body 10 to the front of the body frame 50; Pedestrian-friendly double bumper, characterized in that consisting of. According to claim 1, wherein the bumper body 10, Pedestrian-friendly double bumper, characterized in that the engaging portion 13, 14 and the impact portion 12 is integrally molded by double injection, According to claim 1, wherein the bumper body 10, Pedestrian-friendly double bumper, characterized in that the engaging portion (13, 14) and the collision portion 12 are bonded to each other and integrally molded. The method of claim 1, wherein the fixing device 60, A body 62 having a pressing portion 63 bent in an opposite direction relative to the main surface at an upper portion thereof, and having an extended support portion 64 extending horizontally at a lower portion thereof, and a slide body along the main surface of the body 62. A slide member 66 supporting the frame 50 and a spring member 68 connected to the extension support 64 and the slide member 66 of the body 62, respectively. The pressing portion 63 and the extension support 64 of the body 62 are hingedly connected to the pressing tables 70 and 72, respectively, to press the pressing tables 70 and 72 so as to press the upper and lower surfaces of the bumper body 10 and the support member. The pedestrian-friendly double bumper, characterized in that to be fixed to the body frame 50 by pressing the fixing ring part 32 of (30).