KR101975266B1 - shock-absorbing hinge apparatus for hinged door having auto-return device - Google Patents

Abstract

The present invention provides a shock absorbing hinge device for a hinged door, having an automatic returning unit. The shock absorbing hinge device for a hinge door is to improve durability of each component while improving control convenience of a hinged door. The shock absorbing hinge device for a hinged door includes: a first base unit including a first housing unit with a first hollow and a first hinge unit protruding to the outside in a radial direction of the first housing unit and connected to one among the door or a door frame; a second base unit including a second housing unit having a second hollow forming a rotation space by being connected to the first hollow in a longitudinal direction, wherein the second base unit also includes a second hinge unit protruding to the outer side in the radial direction of the second housing and connected to the other one among the door and the door frame; the automatic returning unit driven in order for a first cam unit to be returned by rotating by an elastic restoration force of a first elastic unit installed in the rotation space; and a shock absorbing device vertical to the automatic returning unit and installed in one among the first base unit and the second base unit, wherein the shock absorbing device provides a shock absorbing force by a working fluid flowing while a front end protruding between the first hinge unit and the second hinge unit is pressed to an opposite surface of one among the door and the door frame. The automatic returning unit includes: a first cam unit including a driving contact unit with a first inclined surface inclined at a preset angle and arranged on one side of the rotation space to move in the longitudinal direction; and a second cam unit installed on the other side of the rotation space and coming into contact with the first inclined surface by sliding and rotating by corresponding to a rotation direction of the door.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a shock-absorbing hinge apparatus for a hinged door having an auto-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber hinge apparatus for a hinged door having an automatic returning means, and more particularly to a shock absorber hinge apparatus for a hinged door having an automatic return means with improved durability of each component while improving operability of the hinged door.

Generally, the door is connected to the door frame by a hinge, and the other side of the door is opened while being separated from the other side of the door frame as the hinge is rotated about the rotation axis of the hinge.

Here, the hinge includes a pair of supporting means which are respectively fixed to adjacent positions of the door and the door frame, and the supporting means is provided so as to be opened or tangled while being rotated about one rotation axis.

On the other hand, the conventional hinged door has a problem that the door must be manually closed when a person goes in and out. At this time, if the external force transmitted when the door is closed is not substantially closed, the door can not maintain the proper room temperature and there is inconvenience due to noise or contaminant inflow. On the other hand, when the external force transmitted when the door is closed is strong, a part of the body such as a finger is caught between the door and the door frame, resulting in injury.

Thus, some hinges provided with automatic return means have been disclosed so that the opened door can be automatically closed.

The hinge provided with such an automatic returning means includes a fixed cam connected to the door and rotated interlocked with the door, a driving cam meshed with the fixed cam, and an elastic means for elastically supporting the driving cam. At this time, inclined surfaces inclined at predetermined angles are formed on the mutually facing surfaces of the fixed cam and the driving cam.

In detail, in a state in which the door is closed, the fixed cam and the driving cam are disposed so that their opposite surfaces are in close contact with each other. When an external force is applied in one direction to open the door, the inclined surface formed on the driving cam is slide-rotated along the inclined surface formed on the fixed cam. Thereby, the driving cam is spaced from the fixed cam and the elastic means is compressed.

At this time, when the external force that opens the door is removed or a predetermined external force acts on the other direction side, the driving cam is pressed toward the fixed cam by the elastic recovery force of the elastic means. Accordingly, the driving cam and the fixed cam are rotated and returned to close contact with each other, so that the door can be closed automatically.

However, in the conventional hinge provided with such an automatic returning means, when the door is frequently opened or an excessive rotational force is applied due to an external force or the like, the inclined surfaces of the driving cam and the fixed cam are worn or damaged. As a result, the driving cam and the fixed cam are not correctly formed, and the door is not completely closed due to a change in the turning radius in the closing direction.

In addition, when the elastic restoring force of the elastic means is set to a large value, the speed at which the rotation is automatically returned is increased, so that a part of the body is caught and injured or a large impact sound is generated.

Moreover, the hinge provided with the conventional automatic return means does not substantially have the function of keeping the door open. As a result, there is a problem that a separate stopper device is installed on the door or a heavy object for temporarily supporting the door is required, resulting in inconvenience.

Korean Patent No. 10-0227866

In order to solve the above problems, the present invention provides a shock absorbing hinge device for a hinged door having an automatic returning means with improved durability of each component while improving the operational convenience of the hinged door.

In order to solve the above-described problems, the present invention provides a hinge device comprising a first housing part formed with a first hollow, a first hinge part protruding radially outwardly of the first housing part and having a first hinge part coupled to either the door or the door frame, A base portion; A second housing part having a second hollow communicating with the first hollow in a longitudinal direction to form a rotating space and a second housing part protruding radially outwardly of the second housing part and coupled to the other of the door and the door frame, A second base portion having a hinge portion; A first cam portion disposed on one side of the rotation space and including a driving contact portion disposed to be movable in a longitudinal direction and having a first inclined surface inclined at a predetermined angle; and a second cam portion provided on the other side of the rotation space, An automatic rotation returning means including a second cam portion slidably in contact with the first inclined surface, the automatic revolving returning means being driven to rotate and return while the first cam portion is pressed by the elasticity restoring force of the first elastic means provided in the rotating space; And a second hinge portion provided on one of the first base portion and the second base portion and disposed perpendicularly to the automatic rotation return means, And a cushioning support device for providing a buffering force by a working fluid flowing while being pressed against a facing surface of any one of the door and the door frame, wherein the cushioning support device is provided at one end of the second cam portion, Wherein the first inclined surface is inclined so as to correspond to the second inclined surface on one side of the driving contact portion and the second inclined surface is inclined upwardly to limit the unidirectional angle of rotation of the second cam portion Characterized in that a limiting protrusion is provided on a stepped surface so that the first inclined surface is brought into contact with the unidirectional end of the open surface The present invention provides a shock-absorbing hinge device for a hinged door.

Here, a first stopper projection protruding in the other direction is formed in the other direction side of the drive contact portion, and a second stopper projection engaging with the first stopper projection is protruded in one direction from the second cam portion, And the end portions of the first stopper projection and the second stopper projection are opposed to each other when the first stopper projection is rotated in one direction so that the end of the drive contact portion is positioned at an inclined upper side of the second inclined surface, And the interval is set so as to exceed the vertical interval between the lower end side and the upper end side of the second inclined surface.

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At this time, the first cam portion is disposed on the inner side of the first hollow portion, and a rotation preventing protrusion protrudes on one mutually facing surface between the outer circumferential surface of the first cam portion and the inner circumferential surface of the first hollow, It is preferable to form the rotation preventing groove which is inserted and moved in the longitudinal direction.

The buffer support device may include a main body portion having a front end portion which is engaged with a coupling hole formed in one of the first hinge portion and the second hinge portion and which has a movable space formed therein, A cylinder portion which is filled with a fluid and which is inserted into a front end portion of the main body portion and has an insertion hole formed at a rear end portion side thereof and a rear end portion which is fixed to an inner rear end portion of the main body portion, A rod portion having a piston portion formed with a fluid movement groove along an outer periphery corresponding to an inner periphery of the cylinder portion and a rear end portion of the cylinder portion, And a second elastic means for providing a elastic restoring force so as to protrude to the outside of the front end portion.

Through the above-mentioned solution, the shock-absorbing hinge apparatus for a hinged door having the automatic returning means according to the present invention provides the following effects.

First, the first cam portion and the second cam portion, which are cam-driven in the rotation space, rotate and return through the elasticity restoring force of the first elastic means within a predetermined rotation angle range, thereby automatically closing the door, So that noise can be minimized, and safety accidents such as pinching of a finger can be prevented.

Secondly, since the first cam portion restrains the rotation of the first cam portion by more than a predetermined rotation angle as the limiting protrusion is projected to the one-directional end portion of the open surface formed in the second cam portion, It is prevented that the second inclined surface and the second stopper projection are erroneously inserted between the first inclined surface and the second inclined surface and the second stopper projection, thereby preventing the product from being damaged or broken.

Thirdly, since the buffer support device is disposed in correspondence with the direction in which the impact is applied when the door is rotated in the other direction, the buffering force through the working fluid is substantially transmitted to the door and can be closed more smoothly, The rotation restoring means is prevented from being excessively rubbed and the durability of the product can be remarkably improved.

1 is a perspective view showing a shock-absorbing hinge apparatus for a hinged door having an automatic returning means according to an embodiment of the present invention;
2 is an exploded perspective view showing a shock absorbing hinge apparatus for a hinged door having an automatic returning means according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hinge device for a hinged door having an automatic returning means.
4 is a front view showing a state in which a part of the first cam portion and the second cam portion is projected.
5A and 5B are cross-sectional views illustrating a state in which the door is rotated in one direction by a shock-absorbing hinge apparatus for a hinged door having an automatic return means according to an embodiment of the present invention.
6A and 6B are views illustrating a state in which the door is rotated in the other direction by the shock-absorbing hinge device for a hinged door having the automatic returning device according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a shock absorbing hinge apparatus for a hinged door having an automatic returning means according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a shock-absorbing hinge apparatus for a hinged door having an automatic returning means according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a shock- It is a perspective view. FIG. 3 is a view illustrating a state of use of the shock-absorbing hinge apparatus for a hinged door having an automatic return means according to an embodiment of the present invention, and FIG. 4 is a view illustrating a state in which a part of the first cam unit and the second cam unit is projected Front view. 5A and 5B are cross-sectional views illustrating a state in which the door is rotated in one direction by a shock-absorbing hinge apparatus for a hinged door having an automatic returning device according to an embodiment of the present invention. Figs. 6A and 6B are views 1 is a cross-sectional view illustrating a state in which the door is rotated in the other direction, with the shock-absorbing hinge apparatus for a hinged door having the automatic return means according to the embodiment.

1 to 6B, a shock-absorbing hinge apparatus 200 for a hinged door having an automatic return means according to an embodiment of the present invention includes a first base unit 210, a second base unit 240, Return means (220) and buffer support device (280).

Here, the first base portion 210 includes a first housing portion 211 and a first hinge portion 212. The first housing part 211 is formed with a first hollow 211a having a circular sectional shape along the longitudinal direction and the first hinge part 212 is formed in a radial direction of the first housing part 211 . At this time, the first hinge part 212 is preferably formed in a plate shape to be coupled or fixed to any one of the door d and the door frame f.

The second base portion 240 includes a second housing portion 241 and a second hinge portion 242. A second hollow portion 241a having a circular cross-sectional shape is formed in the second housing portion 241 along the longitudinal direction so as to communicate with the first hollow portion 211a. The second hinge portion 242 includes a first hollow portion 241a, And protrudes radially outward of the second housing portion 241. At this time, the second hinge part 242 is preferably formed in a plate shape to be coupled or fixed to the other one of the door d and the door frame f.

That is, the first base portion 210 and the second base portion 240 are formed so that the first hollow portion 211a and the second hollow portion 241a communicate with each other in the longitudinal direction to form a rotation space A do. The first hinge portion 212 and the second hinge portion 242 are hingedly rotated about the automatic rotation return means 220 provided in the rotary space A so as to be adjacent to or spaced from each other. Accordingly, the door (d) can be rotated so as to be opened or closed in a hinged state at one side edge of the door frame (f).

The lower end of the first hollow portion 211a and the upper end portion of the second hollow portion 241a adjacent to the first hollow portion 211a are opened to communicate with each other, and the upper end of the first hollow portion 211a and the lower end portion of the second hollow portion 241a Is preferably sealed. For example, it is possible to cover the upper end of the first hollow 211a and the lower end of the second hollow 241a using separate detachable caps 213 and 243 as shown in the drawing. Accordingly, the automatic rotation returning means 220 can be easily assembled and replaced to the inside of the rotary space (A), so that the productivity and maintainability can be remarkably improved. In addition, when the sealing caps 213 and 243 are coupled, foreign substances are prevented from being introduced into the rotating space A, thereby preventing malfunctions when the automatic rotation returning unit 220 is driven.

Hereinafter, the first base portion 210 is coupled to the door d and rotated, and the second base portion 240 is continuously disposed at a lower end portion in the longitudinal direction of the first base portion 210, (f), as shown in Fig. Hereinafter, the one direction R is preferably understood as a direction in which the door d is opened, and the other direction CR is understood as a direction in which the door d is closed.

It is preferable that the automatic rotation return means 220 is disposed in the rotation space A and includes a first cam portion 230, a second cam portion 250 and a first elastic means 221 .

The first cam part 230 is disposed on one side of the rotation space A in a longitudinal direction and includes a first body part 231 and a driving contact part 232. At this time, the first cam part 230 is moved in the longitudinal direction only when the first cam part 230 is moved up and down in a state in which the first cam part 230 is rotated about the rotation axis within the rotation space A Understanding is desirable.

That is, when the first base part 210 is coupled or fixed to the door d as shown in the drawing, the first cam part 230 is not rotated independently inside the rotation space A, And is moved in the longitudinal direction while being interlocked with the base portion 210. Alternatively, when the first base part 210 is coupled to the door frame f, the first cam part 230 is moved only in the longitudinal direction without being rotated inside the rotational space A. Hereinafter, one side of the rotation space A is described and illustrated as the inside of the first hollow 211a.

In detail, the first cam portion 230 is disposed inside the first hollow portion 211a and has an inner diameter of the first housing portion 211, that is, a circular cylinder corresponding to the sectional shape of the first hollow portion 211a Or the like. The first cam portion 230 includes the drive contact portion 232 protruding toward the other end of the first body portion 231. The first contact portion 232 has a predetermined angle The first inclined surface 232b inclined to the first inclined surface 232b is formed.

The second cam part 250 is provided on the other side of the rotation space A and includes a second body part 251 and a rotation driving part 252. Hereinafter, the other side of the rotation space A is described and illustrated as a connection part where the first hollow 211a and the second hollow 241a communicate with each other.

In detail, the second body 251 is disposed on the inner side of the second hollow 241a, and is provided with a coupling member 255 passing through the second housing part 241 and the second body part 251 at the same time And is fixed to the second base portion 240 by the second base portion 240. At this time, fixing projections 241b and fixing grooves 251b may be formed on the opposite surfaces between the outer periphery of the second body 251 and the inner periphery of the second hollow 241a. Accordingly, the second cam part 250 can be prevented from rotating in conjunction with the first cam part 230 in a state where the second cam part 250 is fixed to the second base part 240.

The rotation driving part 252 is disposed at one end side of the second body part 251 and at the lower end side of the first hollow part 211a. At this time, the rotation driving part 252 is preferably formed with a second inclined surface 252b which is in sliding contact with the first inclined surface 232b.

That is, the first inclined surface 232b and the second inclined surface 252b are in face-to-face contact with each other. When the door d is rotated in one direction R by an external force, the first inclined surface 232b, (252b).

Since the first cam part 230 is disposed in a state where the rotation of the first cam part 230 is substantially restrained from the inside of the first hollow part 211a, the first cam part 230 is rotated together with the first housing part 211, , Only one side and the other side are moved.

It is understood that the first cam part 230 rotates substantially in conjunction with rotation of the door d, but moves only in the longitudinal direction from the inner side of the first hollow part 211a. Therefore, when the first inclined surface 232b is slidably pressed on the second inclined surface 252b during the one-directional rotation of the door d, the first cam portion 230 is moved to one side of the rotating space A Lt; / RTI >

The first elastic means 221 provided in the rotary space A is compressed while the other end side of the first body part 231 is separated from the one end side of the second body part 251.

The first elastic means 221 is preferably a coil spring, and is preferably disposed between the first cam portion 230 and the closed one side of the first hollow portion 211a. The first elastic means 221 can be compressed between the first cam portion 230 raised and lowered to one side of the rotary space A and the upper end of the first hollow portion 211a.

When the external force that rotates the door d in one direction R is removed or a predetermined external force is applied to the other direction CR, the restoring force of the first resilient means 221, which has been compressed, (230). The first cam part 230 is moved to the other side in the rotation space A and the first inclined surface 232b is slid toward the other direction CR along the second inclined surface 252b, As shown in Fig.

That is, the first cam portion 230 is moved up and down in the rotational axis direction by slidingly pressing the inclined surfaces 232b and 252b formed on the cam portions 230 and 250 against each other, and the first elastic means 221, It can be automatically returned to its original position through the restoring force. Accordingly, even when the door (d) is operated in the other direction (CR) with a minimum force, the door (d) is automatically closed within a predetermined rotation angle range, so that the convenience of using the hinged door can be remarkably improved.

At this time, it is preferable that a rotation preventing protrusion 231b is formed on one mutually facing surface between the outer circumferential surface of the first cam portion 230 and the inner circumferential surface of the first hollow portion 211a. In addition, it is preferable that a rotation preventing groove 211b, which guides insertion of the rotation preventing protrusion 231b and movement of the rotation preventing protrusion 231b in the longitudinal direction, is formed on the other surface.

Accordingly, the first elastic portion 221 can be compressed while the first cam portion 230 is lifted and moved only in the longitudinal direction without being idle in the rotational space A. Accordingly, the pressing force, that is, the elastic restoring force of the first elastic means 221, which is provided so that the first inclined surface 232b and the second inclined surface 252b are slide-pressed against each other, is accurately transmitted. Therefore, since the automatic rotation returning means 220 is automatically rotated and returned, the driving reliability of the product can be remarkably improved.

Of course, depending on the case, at least one of the cut portions may be formed on the outer surface of the first cam portion 230, and a planar portion corresponding to the cut portion may be provided on the inner circumference of the first hollow portion 211a. And falls within the scope of the present invention.

4 to 5A and 6A, the second inclined surface 252b includes a closed surface 252a and an open surface 252c which are formed at one end of the second cam portion 250, It is preferable to arrange them upward in one direction R. It is preferable that the second inclined surface 252b is formed at an inclination angle corresponding to the first inclined surface 232b formed on the one side R of the driving contact portion 232. [

Specifically, the closed surface 252a is formed at one end of the rotation driving part 252 in a horizontal plane along the circumferential direction. The open surface 252c is formed in a horizontal plane along the circumferential direction on the upper surface of the step 252d protruding stepwise from the closed surface 252a.

The driving contact portion 232 is disposed such that an end of the driving contact portion 232 is in contact with the closing surface 252a in a closed state of the door d and is in contact with the second inclined surface 252b when the door d rotates in one direction And then placed in contact with the open surface 252c. Since the pressing force to the other end side is transmitted to the first cam portion 230 by the restoring force of the first elastic means 221, the end portion of the driving contact portion 232 is in close contact with the open surface 252c Friction stop and pressure restraint are applied. Accordingly, the opened state of the door d can be maintained until a separate external force is applied.

Therefore, since the door d is not required to have a separate stopper or supporting device for fixing the opened state of the door d, the operability of the door d can be further improved and the stopper member protruding around the door d It is possible to prevent inconveniences such as hanging of the user. Further, since the rotation of the driving contact portion 232 is stopped by friction with the open surface 252c, the door d can be prevented from being excessively opened in the one direction R. [ Accordingly, since the breakage and malfunction of the automatic rotation returning means 220 are prevented, the service life of the product can be remarkably prolonged.

Conventionally, a cam member configured to be automatically closed is not equipped with a separate means for limiting the rotation angle in one direction, and malfunctions and malfunctions are frequently caused. That is, the cam protrusion protruded to be engaged with each other is rotated at a predetermined angle or more, and the cam protrusion is not engaged with the cam protrusion. Accordingly, the present invention discloses a structure for solving such a problem.

A restriction protrusion 252e is formed at a stepped end so that the first inclined surface 232b is brought into contact with the one end side R of the open surface 252c so as to limit the rotation angle of the first cam 250, Is preferable. That is, the rotation driving part 252 may be formed in a multi-stepped stepped shape with the end portions of the closing surface 252a, the open surface 252c, and the limiting protrusion 252e facing one side at a predetermined interval. It is to be understood that the portion indicated by the dotted line in the enlarged view shown in the left side of FIG. 5A indicates that the upper surface of the closed surface 252a, the open surface 252c, and the upper surface of the limiting protrusion 252e each have a stepped shape desirable.

Therefore, when the door d rotates in one direction R, the driving contact portion 232 is disposed on the open surface 252c after being slid along the second inclined surface 252b from the closing surface 252a . Since the end of the driving contact portion 232 is engaged with the limiting protrusion 252e protruding to one side of the one side R of the open surface 252c, excessive rotation to the one side R is restricted .

In other words, the driving contact portion 232 can be moved in one direction (for example, the first direction) through the frictional force between the contact surfaces, the urging force of the first elastic means 221, and the restricting projection 252e in a state of being disposed on the open surface 252c R is prevented. Therefore, the rotation angle of the door d can be limited to a predetermined rotation angle range.

This prevents the driving contact portion 232 from falling down between the second stopper projection 254 and the second inclined surface 252b due to the rotation of the door d over a predetermined rotation angle have. Thus, the driving stability and the driving reliability of the shock-absorbing hinge device 200 for a hinged door having the automatic returning means can be remarkably improved.

On the other hand, the first stopper protrusion 234 protruding in the other direction CR toward the end is formed on the other side CR of the drive contact portion 232. The second stopper protrusion 254, which is engaged with the first stopper protrusion 234, may protrude from the second cam part 250 in a one-directional manner.

When the external force that rotates the door d in one direction R is removed or a predetermined external force is applied to the other direction CR, the first cam portion 221 is rotated by the elastic force of the first elastic means 221, 230) is pushed to the other side of the rotating space (A). The driving contact portion 232 is lowered to the other side of the rotary space A so that the first inclined surface 232b and the second inclined surface 252b are in slide contact with each other.

At this time, the first cam part 230 is provided to be rotated substantially in interlock with the first base part 210 through the rotation preventing protrusion 231b and the rotation preventing groove 211b. Accordingly, as the first inclined surface 232b is slid along the second inclined surface 252b, the rotational force for rotating the first cam 230 is substantially transmitted to the first base 210, , And the door (d) is closed.

The first stopper protrusion 234 and the second stopper protrusion 254 are adjacent to each other when the door d is rotated in the other direction CR and the stopper protrusions 234, And the rotation in the other direction CR is restrained while being inserted into the surfaces 234b and 254b.

At this time, each of the restricting surfaces 234b and 254b is formed in a profile corresponding to the protruded outer surface of each of the stopper protrusions 234 and 254. The first stopper projection 234 and the second stopper projection 254 correspond exactly to the inner sides of the respective restricting surfaces 234b and 254b when the automatic rotation returning means 220 is rotated and returned. Accordingly, even when the door (d) is repeatedly opened and closed, wear and / or breakage of each component is minimized, and the rotation angle is precisely constrained, so that driving reliability and driving stability of the product can be remarkably improved.

Here, the first stopper protrusion 234 and the second stopper protrusion 234 may be rotated when the end of the drive contact portion 232 is rotated in one direction (R) so that the end of the drive contact portion 232 is positioned on the stepped upper side of the second inclined surface 252b, It is preferable that the end portions of the two stopper protrusions 254 overlap each other. The vertical distance between the second stopper protrusions 254 protruded from the closing surface 252a is equal to the vertical distance between the lower end and the upper end of the second inclined surface 252b, ) And the open surface 252c.

Furthermore, it is preferable that the protruding end of the second stopper projection 254 is formed so as to correspond to the protruding end of the limiting protrusion 252e. The first stopper protrusion 234 and the second stopper protrusion 254 may be overlapped with each other when the drive contact portion 232 is disposed on the open surface 252c.

The first stopper protrusion 234 and the second stopper protrusion 254 are adjacent to each other when the door d is rotated in the other direction CR so that the ends of the first stopper protrusion 234 and the second stopper protrusion 254 are engaged with each other, , And 254b. This prevents the automatic rotation returning means 220 from being excessively rotated toward the other side (CR) side, thereby preventing wear and tear of the product, and significantly improving the driving reliability of the product.

In addition, wear prevention rings 271 and 272 are provided between the first base portion 210 and the second base portion 240 and between the second cam portion 250 and the lower end portions of the first hollow portion 211a .

In other words, since the separate anti-wear rings 271 and 272 are disposed at the portion repeatedly rubbed when the hinge rotation of the automatic rotation returning unit 220 is performed, it is possible to prevent the cavitation due to wear of the cam portions 230 and 250 from occurring , The service life of the product can be remarkably prolonged.

The buffer support device 280 is coupled to one of the first hinge part 212 and the second hinge part 242 and includes a body part 281, a cylinder part 282, a rod part 283 And a second elastic means 284, as shown in FIG. Hereinafter, the main body portion 281 of the buffer support device 280 is described and shown as being coupled to the second hinge portion 242.

The buffer support device 280 is preferably disposed perpendicular to the automatic rotation return means 220 and is disposed in a direction corresponding to a direction in which the impact is applied when the door d rotates in the other direction .

More specifically, the buffer support device 280 has a front end protruding between the first hinge part 212 and the second hinge part 242 when the automatic rotation returning device 220 is rotated and returned, And provides a buffering force by a working fluid that is pressurized and flows on either of the opposed faces of the door frame f.

At this time, when the buffer support device 280 is coupled to the second hinge part 242, the door frame f may be formed with a receiving groove fa into which the buffer support device 280 is inserted. Of course, the buffer support device 280 may be coupled to the first hinge part 212, and in this case, the receiving groove may be formed in the door d.

In detail, the body portion 281 is formed with an outer diameter corresponding to the engaging hole 242a formed in the second hinge portion 242, and a moving space is formed inside the front end portion of the body portion 281 in which the front end portion is opened. The front end of the main body 281 is preferably coupled to the coupling hole 242a.

At this time, an engaging protrusion 281a extending radially outward to engage with the rim of the engaging hole 242a is formed at the rim of the front end of the main body 281. As a result, the end portion of the buffer support device 280 collides against the edge surface da of the door d in the closed state of the door d, .

Also, the rear end portion of the main body portion 281 may be open, but may be covered by a separate cap member 286. [ As a result, the assembling and replacement of the respective components disposed inside can be easily performed, and productivity and maintenance can be improved remarkably.

The cylinder portion 282 is inserted into the front end portion of the main body portion 281.

In detail, a working fluid is filled in the cylinder part 282 and an insertion hole 282a is formed in the rear end side. At this time, it is preferable that the outer diameter of the cylinder portion 282 corresponds to the inner diameter of the body portion 281, and the abrasion due to friction when the cylinder portion 282 moves in the forward and backward directions of the movement space is minimized The diameter of which is preferably in the range of.

Here, the working fluid can be prevented from flowing out to the outside of the door frame f as the cylinder portion 282 is moved in the forward and backward directions while being inserted into the body portion 281.

The cushioning head portion 282b may be provided at the front end of the cylinder portion 282. The shock transmitted to the shock absorber 280 can be transmitted to the shock absorber 280 even if the corner surface da of the door d, which is the surface opposed to the front end side of the shock absorber 280, collides with the cylinder portion 282, The durability of the product can be remarkably improved.

The rear end of the rod portion 283 is fixed to the inner rear end of the main body portion 281 and the front end portion of the rod portion 283 passes through the insertion hole 282a and is disposed inside the cylinder portion 282. [ At this time, a piston portion 285 is provided at the front end of the rod portion 283, and the piston portion 285 is provided with a fluid movement groove (not shown) along the outer periphery corresponding to the inner circumference of the cylinder portion 282 And may be formed in at least one longitudinal direction.

In addition, the second elastic means 284 is preferably provided between the inner rear end of the body portion 281 and the outer rear end of the cylinder portion 282. The second elastic means 284 provides the elastic restoring force so that the front end portion of the cylinder portion 282 protrudes to the front side of the opened front end portion of the main body portion 281.

The front end portion of the cylinder portion 282 is disposed to protrude between the first hinge portion 212 and the second hinge portion 242 due to the elastic restoring force of the second elastic means 284. When the door d is rotated in the other direction CR, the cylinder portion 282 is positioned on one of the facing surfaces of the door d and the door frame f, And is urged toward the rear end side.

On the other hand, mutually opposite side edges of the door d and the door frame f are spaced apart from each other in the opened state of the door d, and the cylinder portion 282 Is protruded between the first hinge part (212) and the second hinge part (242). The piston 285 is located at the inner rear end of the cylinder 282 and the working fluid is located on the left side of the piston 285, that is, the front end of the cylinder 282.

At this time, when the door (d) rotates in the other direction (CR), the corner portion of the door (d) is adjacent to the door frame (f) and presses the protruded cylinder portion (282) toward the rear end side. At this time, as the cylinder portion 282 is pressed toward the rear end portion, the position of the piston portion 285 is relatively changed to the inner front end portion of the cylinder portion 282. Since the working fluid is an incompressible fluid, the working fluid is moved to the right side of the cylinder portion 282, that is, the rear end portion of the cylinder portion 282 through the fluid movement groove (not shown).

Since the speed change of the door d is attenuated through the turbulence resistance (resistance proportional to the square of the velocity) generated when the working fluid moves through the fluid moving groove (not shown) It is possible to prevent the means 220 from returning suddenly.

Therefore, it is possible to prevent the door (d) or the buffer hinge device (200) from being damaged due to an impact even when an excessive external force is applied to the door (d) in the other direction (CR). In addition, a safety accident such as a part of a user's body such as a finger of a user can be prevented in advance due to the door (d) being rapidly closed.

When the door d is opened again, the front end portion of the cylinder portion 282 is pressed against the first hinge portion 212 and the second hinge portion 282 by the elastic restoring force of the second elastic means 284, 242, respectively. Thus, even if the door d is repeatedly opened, the buffer support device 280 can always return to a position where the rotation speed and impact can be buffered when the door d is closed.

Furthermore, it is preferable that the elastic recovery force of the first elastic means 221 is set to be larger than the elastic recovery force of the second elastic means 284. Therefore, the first cam portion 230 is pressed through the elastic restoring force of the first elastic means 221, and the rotational returning force of the automatic rotation returning means 220 is restored to the elastic restoring force of the second elastic means 284 The force acting on the cylinder portion 282 is greater than the force exerted on the cylinder portion 282.

The elastic force of the second elastic means 284 is applied to the door d through the elastic restoring force of the first elastic means 221 even if the force for pressing the cylinder portion 282 toward the front end side is always applied, Can be stably performed.

Although the first base part 210 is coupled to the door d and the second base part 240 is coupled to the door frame f in the present embodiment, 210 may be coupled to the door frame f and the second base portion 240 may be coupled to the door d.

Here, when the second base portion 240 is coupled to the door d, the second cam portion 250 may be rotated in conjunction with the door d. At this time, the rotation of the first cam part 230 may be restricted so as to move only in the longitudinal direction of the rotation space A from the inside of the first hollow part 211a.

In addition, the buffer support device 280 may be coupled to the hinge coupled to the door d, and such modifications are within the scope of the present invention.

Accordingly, the shock-absorbing hinge device 200 for a hinged door having the automatic returning means according to the present invention is configured such that the first cam portion 230 and the second cam portion 25, which are cam-driven in the rotation space A, Is rotated and returned through the elastic restoring force of the first elastic means (221) within the rotation angle range.

Accordingly, since the door d coupled to the product is automatically closed, the usability is remarkably improved, and the rotation speed of the door d can be attenuated through the buffer support device 280 provided together. Accordingly, when the door (d) is closed, the noise caused by the impact is minimized, and a safety accident such as a fingertip can be prevented in advance.

In addition, as the limiting protrusion 252e protrudes from one end of the open surface 252c formed on the second cam 250, the first cam 230 is rotated to a predetermined rotation angle or more. The driving contact portion 232 protruding from the other end of the first cam portion 230 is inserted between the second inclined surface 252b of the second cam portion 250 and the second stopper projection 254, It is possible to prevent the product from being damaged or broken.

In addition, since the buffer support device 280 is disposed in correspondence with the direction in which the impact of the door d is rotated in the other direction, the buffer force through the working fluid is substantially transmitted to the door d. Accordingly, the door (d) can be closed more smoothly, and the automatic rotation returning means (220) is prevented from being excessively rubbed, so that the durability of the product can be remarkably improved.

Here, the terms "comprises", "comprising", "having", or "having" as used in the above description mean that the constituent element can be included unless otherwise stated. It is to be understood that the invention is not limited to the components but may include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And these modifications fall within the scope of the present invention.

200: Buffer hinge device for a hinged door with automatic return means
210: first base portion 220: automatic rotation return means
221: first elastic means 230: first cam portion
232: driving contact portion 232b: first inclined surface
234: first stopper projection 240: second base portion
250: second cam part 252: rotation driving part
252a: Closed surface 252b: Second inclined surface
252c: open face 254: second stopper projection
280: buffer support device 281:
282: cylinder part 283: rod part
284: second elastic means

Claims (5)

A first base portion having a first housing portion formed with a first hollow portion, a first hinge portion protruding radially outwardly of the first housing portion and coupled to one of the door and the door frame;
A second housing part having a second hollow communicating with the first hollow in a longitudinal direction to form a rotating space and a second housing part protruding radially outwardly of the second housing part and coupled to the other of the door and the door frame, A second base portion having a hinge portion;
A first cam portion disposed on one side of the rotation space and including a driving contact portion disposed to be movable in a longitudinal direction and having a first inclined surface inclined at a predetermined angle; and a second cam portion provided on the other side of the rotation space, An automatic rotation returning means including a second cam portion slidably in contact with the first inclined surface, the automatic revolving returning means being driven to rotate and return while the first cam portion is pressed by the elasticity restoring force of the first elastic means provided in the rotating space; And
Wherein the first hinge portion and the second hinge portion are provided at any one of the first base portion and the second base portion and are vertically disposed with respect to the automatic rotation return means, And a buffering device for providing a buffering force by a working fluid flowing while a front end portion of the door is pressed against the opposing face of either the door or the door frame,
Wherein a second inclined surface is disposed so as to be upwardly sloped in one direction between a closed surface and an open surface which are formed so as to be stepped on one end of the second cam portion so that the first inclined surface corresponds to the second inclined surface on one side of the drive contact portion Shaped,
Wherein a limiting protrusion is provided on the one end of the open surface so as to limit the one-way rotation angle of the second cam part so that the first inclined surface is in contact with the first inclined surface. delete The method according to claim 1,
A second stopper protrusion protruding in the other direction with respect to an end portion is formed on the other direction side of the drive contact portion and a second stopper protrusion engaging with the first stopper protrusion protrudes in one direction in the second cam portion,
The first stopper protrusion and the second stopper protrusion are overlapped with each other such that the end of the drive contact portion overlaps the inclined upper end of the second slope surface when the first stopper protrusion and the second stopper protrusion are rotated in one direction, Is set to exceed a vertical distance between a lower end side and an upper end side of the second inclined surface. The method according to claim 1,
Wherein the first cam portion is disposed inside the first hollow portion,
Wherein a rotation preventing protrusion is formed on one surface of the first cam which is opposed to an outer circumferential surface of the first cam portion and an inner circumferential surface of the first hollow portion and a rotation preventing groove is formed on the other surface of the rotation preventing protrusion, A buffer hinge device for a hinged door having an automatic return means. The method according to claim 1,
The buffer support device
A main body portion having a front end portion which is engaged with a coupling hole formed in any one of the first hinge portion and the second hinge portion,
A cylinder portion which is filled with the working fluid therein and which is inserted into the front end portion side of the main body portion and has an insertion hole formed in the rear end portion side,
A rod portion having a rear end portion fixed to an inner rear end portion of the main body portion and having a piston portion having a fluid movement groove formed along an outer periphery corresponding to an inner periphery of the cylinder portion at a front end portion disposed inside the cylinder portion through the insertion hole, ,
And a second elastic means provided between an inner rear end of the main body and an outer rear end of the cylinder, the second elastic means providing a elastic restoring force so that the front end of the cylinder protrudes outside the opened front end of the main body And a returning means.

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