KR200386957Y1 - A damping apparatus for door open and close - Google Patents

Abstract

The present invention allows the hydraulic amplification and cushion cushion to be blocked while the door is closed, so that the damping operation is smooth and quiet until the end, and the plunger withdrawal operation is quickly made by opening the flow path. By assisting the operation, the usability is remarkably improved, reducing the overall length of the device, improving the straightness and quality characteristics, widening the installation application area by miniaturization, and eliminating many packing members and separate housings that were involved in the prior art, thereby improving productivity. It relates to a damping device for opening and closing the door to significantly reduce the manufacturing cost by improving.

The present invention for realizing this is a door opening and closing damping device in which the plunger is damped by the elasticity of the spring and the resistance of the fluid pressure in the cylinder, the fluid is filled inside the head portion of the plunger is to be mounted on the structure A cylinder having a bracket; A plunger having a flow path formed in the head part disposed in the cylinder, a valve for opening / closing the valve for damping when the door is closed, and a pressing part pressed by the door at an end of the rod disposed outside the cylinder; And a spring disposed between the pressing portion of the plunger and the cylinder.

Description

Damping device for door opening and closing {A DAMPING APPARATUS FOR DOOR OPEN AND CLOSE}

The present invention relates to an opening and closing damping device of the door, and in particular, to shut off the flow path during the closing operation of the door, and to amplify the hydraulic amplification and cushion cushion, so that the damping operation is made smoothly and quietly to the end, and the plunger withdrawal operation It is made quick by the opening of the flow path, which greatly improves the feeling of use by assisting the door opening operation, improving the straightness and quality characteristics by reducing the overall length of the device, and widening the installation application area by miniaturization. And it relates to a damping device for opening and closing the door to significantly reduce the manufacturing cost by eliminating a separate housing and the like to improve the productivity.

Generally, a door of a furniture such as a window or a sink is equipped with a damping device for preventing shock and noise by smoothly closing the door.

Such a damping device is generally configured to receive the resistance of the fluid pressure in the cylinder while the plunger is operated by the spring elasticity for braking and deceleration.

Looking at the configuration of the damping device of the prior art, the plunger is disposed in the cylinder filled with the fluid to receive the elasticity of the compression spring, the plunger is equipped with a plurality of packing, is provided with a separate housing for fixing to the structure.

Then, a play that is a fluid passage is formed between the packing and the inner wall of the cylinder.

In this configuration, the fluid movement during the reciprocating operation of the plunger is made by the loose play existing between the packing of the outer edge of the plunger head and the inner wall of the cylinder, while the resistance area against the hydraulic pressure of the plunger head is small so that the damping action is minimal and There was a problem that the operation or the closing operation is made at the same speed and the feeling of use falls.

In addition, since the rod of the plunger is fixed to the housing and the cylinder is sunk by the reaction of the plunger, there is a fatal problem that the damping function is lost due to the cylinder not being pushed out of the housing.

In addition, due to the large number of parts, the productivity is reduced, and due to the long length of about 70 mm, the straightness is reduced, the quality characteristics are reduced, and there is a problem in that the installation area is restricted.

The present invention has been devised to solve the above problems,

The purpose of the present invention is to block the flow path during the closing operation of the door, and to hydraulically amplify the plunger's drawing operation at an extremely low speed, and the closing operation is also performed to cushion the cushion so that the damping operation is smooth and quiet until the end. In order to provide a damping device for opening / closing the door, the plunger withdrawal operation is quickly performed by opening the flow path, thereby assisting the door opening operation to significantly improve the feeling of use.

Another object of the present invention is to reduce the overall length of the device to improve the straightness and quality characteristics, to increase the installation area by miniaturization, and to eliminate the number of packing members and separate housings involved in the prior art to improve the production cost To provide a damping device for opening and closing the door to significantly reduce the.

The door opening and closing damping device according to the present invention to achieve the above object,

In the door opening and closing damping device in which the plunger is damped by the spring elasticity and the resistance of the fluid pressure in the cylinder,

 A cylinder filled with a fluid inside the head portion of the plunger and having a bracket for mounting on the structure;

A plunger having a flow path formed in the head part disposed in the cylinder, a valve for opening / closing the valve for damping when the door is closed, and a pressing part pressed by the door at an end of the rod disposed outside the cylinder; And

And a spring disposed between the pressing portion of the plunger and the cylinder.

Hereinafter, an embodiment of a damping device for opening and closing the door of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a cross-sectional view showing the configuration of an embodiment according to the present invention, Figure 2 is an exploded perspective view showing a configuration of an embodiment according to the present invention, Figure 3 is a perspective view of the combined installation of Figure 2, Figure 4a is a cross-sectional view of Figure 3, 5 is an enlarged cross-sectional view of FIG. 4A.

1 to 5, in the door opening and closing damping device in which the plunger is damped by the elasticity of the spring and the resistance of the fluid pressure in the cylinder, the head portion 30a of the plunger 30 is accommodated. The fluid 10 is filled in the cylinder 10 having the bracket 11 for mounting on the structure, the flow path 31a is formed in the head portion 30a disposed in the cylinder 10, damping during the door closing operation The plunger 30 and the pressing portion of the plunger are provided with a valve 33 for opening and closing the valve 33 and a pressing portion 35a pressurized by the door at an end of the rod 35 disposed outside the cylinder. It is configured to include a spring (50) disposed between the 35a) and the cylinder (10).

Here, the head portion 30a of the plunger is formed by coupling the valve 33 and the head 31 to the tip of the rod 35 at the tip of the rod 35, and having an upper portion at the tip of the rod 35 in a U shape. An open valve hole 35b is formed, and the head 31 has a stepped portion 31d formed in a body 31b having a sleeve 31c fitted to the tip of the rod 35. 33 is provided at the front end of the support part 33a and the support part to be slidably fitted into the valve hole 35b, and is formed in correspondence with the step portion 31d of the head to open and close the flow path 31a. ) Is formed, and the support portion is preferably formed with a long hole (33c) to be movable on the pin (37).

The valve 33 has a curved groove 33d close to a hemispherical shape in order to expand the hydraulic resistance area, and a convex curved portion 12 corresponding to the curved groove 33d of the valve is formed inside the cylinder 10 of the cylinder 10. Is formed.

The convex bent portion 12 of the cylinder is provided with a cushioning elastic projection 13, the curved groove 33d of the valve is formed with a buffer groove (33e) to prevent the inflow of the buffering elastic projection (13) is formed desirable.

In addition, a fine gap s is formed between the outer circumferential surface of the head 31 of the plunger and the inner wall of the cylinder 10, and the flow path 31a is preferably formed in a crank form.

In this way, the flow path 31a is formed in a crank form to expand the fluid filling space on the side where the sleeve 31c is accommodated.

In addition, the pressing portion 35a of the plunger is made of an elastic material cap which is covered at the end of the rod 35, and preferably, a groove 35c or a protrusion for supporting the spring 50 is formed. The cap forming the pressing portion 35a may be made of a rubber material.

O-ring 41 may be provided on the outer circumference of the plunger head 31. The O-ring 41 is installed to have a fine clearance through which fluid can pass between the inner walls of the cylinder 10 and is not intended to be completely sealed.

The cylinder 10 is formed by dividing the main body 10a, the intermediate body 10b, and the fixed body 10c into which one of the head parts 30a of the plunger is interposed.

The intermediate body 10b has a through hole 15 through which the plunger rod 35 reciprocates, a locking step 16 for the plunger head 31 and a retainer groove 17 for preventing oil leakage. ,

The fixed body 10c is coupled to the main body 10a and the intermediate body 10b to extend the main body 10a and to fix the retainer 43, and the exposed portion of the plunger rod 35 and the spring 50. It is preferable that the opening hole 14 is accommodated and the bracket 11 is integrally formed.

In addition, the bracket 11 is formed with a fastening hole (11a) for fixing to the structure by the fastening means.

As illustrated in FIG. 6, an adhesive sheet 18 having a release paper 18a may be provided on the rear surface of the bracket 11. Reference numeral 35d is a pin hole formed in the side wall of the valve hole 35b of the plunger rod 35.

It looks at the action state of the damping device (1) for opening and closing the door according to the present invention having such a configuration.

The cylinder 10 is fixed to the structure (eg, the main body of the furniture) 2 using the bracket 11, and the pressing part 35a of the plunger 30 protrudes from the cylinder 10 to close the door. When pressed in, it is pushed in.

Here, looking at the drawing operation of the plunger 30 in more detail, when the pressure is applied through the pressing portion 35a of the rod by the door closing operation in the state that the plunger 30 is protruded to the outside the spring 50 The plunger 30 is pushed into the cylinder while receiving the resistance of the valve. At this time, the valve 33 located in the plunger head portion 30a opens the pin 37 in the direction of blocking the flow path 31a of the head 31. The valve flange 33b is seated on the stepped portion 31d of the head while being pushed by the long hole 33c to block the movement of the fluid and the inlet movement of the plunger 30, that is, the movement of the door 3 in the closing direction Suppressed (see FIG. 4B).

Subsequently, the pressure of the door 3 is applied to the plunger 30, and the fluid is moved by using a micro clearance formed between the outer circumferential surface of the plunger head 31 and the inner wall of the cylinder 10. Damping movement takes place.

Due to the curved groove 33d formed in the valve 33 in the low speed drawing operation of the plunger 30, the resistance area of the fluid is significantly increased and the damping effect is further amplified.

In addition, when the door 3 is completely closed, the curved groove 33d portion of the valve contacts the convex curved portion 12 of the cylinder, and cushion cushioning is performed, thereby making the termination operation more quiet. Here, due to the cushioning elastic protrusion 13 and the buffer groove 33e of the valve 33 provided in the convex curved portion 12, the buffering action is repeated again and the door closing operation is finished to maximize the damping and the feeling of use. do.

On the contrary, in the opening operation of the door, when the pressure applied to the plunger pressing part 35a is released while the door 3 is opened, the plunger 30 is drawn out by the repulsive force of the spring 50 at the same time. At this time, the valve 33 is pushed backward by the hydraulic pressure flowing in through the flow path 31a toward the sleeve 31c of the head, so that the closed flow path is opened. Accordingly, the withdrawal operation of the plunger 30 is performed quickly and the door is opened. To assist the opening operation of (see FIG. 4C).

That is, the damping device for opening and closing the door of the present invention blocks the flow path (31a) during the closing operation of the door and leads the drawing operation of the plunger (30) at an extremely low speed by amplifying the resistance pressure due to the curved groove (33d) The end operation is also made to be a multi-stage buffer to be smooth and quiet to the end, while the plunger 30 withdrawal operation is made quickly to assist the door opening operation.

In addition, the spring 50 is installed between the pressing portion 35a of the plunger and the cylinder 10, thereby reducing the overall length of the device, which previously reached 70 mm, to 50 mm or less, improving the straightness and quality characteristics. Will significantly expand.

On the other hand, when the adhesive sheet 18 is provided to the bracket 11, the installation on the structure (2) is made very easy.

In addition, since the number of parts is reduced by eliminating a plurality of packing members and separate housings, which have been involved in the prior art, not only the component cost is reduced but also the assembly and productivity are remarkably improved.

 In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, but should be construed as meanings and concepts corresponding to the technical spirit of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

As described in detail above, the damping device for opening and closing the door according to the present invention is

When the door is closed, the flow path is blocked and hydraulic amplification leads to the plunger's drawing operation at extremely low speed, and the damping operation is made in multiple stages at the end point so that the damping operation is smooth and quiet until the end. Due to the rapid opening by opening the flow path, there is an excellent effect of significantly improving the usability by assisting the door opening operation.

In addition, by reducing the overall length of the device to reduce the size, to improve the straightness and quality characteristics, to expand the installation application area, and to eliminate productivity by eliminating a large number of packing members and separate housings involved in the prior art to significantly reduce the manufacturing cost It provides a damping device for opening and closing the door.

1 is a cross-sectional view showing the configuration of an embodiment according to the present invention

Figure 2 is an exploded perspective view showing the configuration of an embodiment according to the present invention

3 is a perspective view of the combination of Figure 2 (installation state)

4A is an enlarged cross-sectional view of FIG.

4B is a plunger entry progress state diagram of FIG. 4A (door closing direction).

4C is a plunger withdrawal progress state diagram (door opening direction) of FIG. 4A

5 is an enlarged cross-sectional view taken along the line A-A of FIG.

6 is a block diagram of an embodiment according to the present invention

* Explanation of symbols for the main parts of the drawings

1: damping device for opening and closing the door of the present invention

10: cylinder 10a: main body 10b: intermediate body

10c: fixed body 11: bracket 12: convex bent portion

13: cushioning elastic projection 14: opening hole 15: through hole

16: Jam step 17: Retainer groove 30: Plunger

30a: head part 31: head 31a: flow path

31b: body 31c: sleeve 33: valve

33a: support portion 33b: valve flange 33c: long hole

33d: curved groove 33e: buffer groove 35: rod

35a; Pressing part 35b: valve hole 35c; home

41: O-ring 43: Retainer 50: Spring

Claims (10)

In the door opening and closing damping device in which the plunger is damped by the spring elasticity and the resistance of the fluid pressure in the cylinder,  A cylinder (10) having a bracket (11) for filling a fluid in the interior in which the head portion (30a) of the plunger (30) is accommodated and mounted on the structure; A flow path 31a is formed in the head part 30a disposed in the cylinder 10, and a flow path opening / closing valve 33 for damping during the door closing operation is installed, and a rod 35 disposed outside the cylinder. Plunger 30 is formed at the end of the pressing portion (35a) is pressed by the door; And And a spring (50) disposed between the pressing portion (35a) of the plunger and the cylinder (10). The method of claim 1, The head portion 30a of the plunger is formed by coupling the valve 33 and the head 31 to a pin 37 at the tip of the rod 35. A valve hole 35b having an upper portion formed in a U shape is formed at the tip end of the rod 35. The head 31 has a stepped portion 31d formed on a body 31b having a sleeve 31c fitted to the tip of the rod 35. The valve 33 is provided at the front end of the support part 33a and the support part which is slidably fitted into the valve hole 35b and is formed corresponding to the step part 31d of the head to open and close the flow path 31a. A flange 33b is formed, and the support part is a damping device for opening and closing the door, characterized in that the long hole (33c) is formed to be movable on the pin (37). The method according to claim 1 or 2, The valve 33 is formed with a curved groove 33d close to a hemispherical shape to expand the hydraulic resistance area, Door opening and closing damping device, characterized in that the convex curved portion (12) corresponding to the curved groove (33d) of the valve is formed in the inner side of the cylinder (10). The method of claim 3, wherein The convex curved portion 12 of the cylinder is provided with a buffer elastic projection 13, Door damping device, characterized in that the curved groove (33d) of the valve is formed with a buffer groove (33e) to prevent the inflow of the buffer elastic projection (13). The method according to claim 1 or 2, A fine gap (s) is formed between the outer circumferential surface of the head (31) of the plunger and the inner wall of the cylinder (10), and the flow passage (31a) is formed in a crank form. The method according to claim 1 or 2, The pressing portion 35a of the plunger is made of an elastic material cap that is covered at the end of the rod 35, and a damping for opening and closing the door, characterized in that a groove 35c or a protrusion for supporting the spring 50 is formed. Device. The method according to claim 1 or 2, O-ring 41 is provided on the outer periphery of the plunger head 31, the door opening and closing damping device. The method of claim 1, The cylinder 10 is formed by dividing the main body 10a, the intermediate body 10b, and the fixed body 10c into which one of the head parts 30a of the plunger is interposed. The intermediate body 10b has a through hole 15 through which the plunger rod 35 reciprocates, a locking step 16 for the plunger head 31 and a retainer groove 17 for preventing oil leakage. , The fixed body 10c is coupled to the main body 10a and the intermediate body 10b to extend the main body 10a and to fix the retainer 43, and the exposed portion of the plunger rod 35 and the spring 50. The door opening and closing damping device, characterized in that the opening (14) is accommodated and the bracket (11) is formed integrally. The method according to claim 1 or 8, The bracket 11 is a damping device for opening and closing the door, characterized in that the fastening hole (11a) is formed to be fixed to the structure by the fastening means. The method according to claim 1 or 8, The damping device for opening and closing the door, characterized in that the back of the bracket 11 is provided with an adhesive sheet 18 provided with a release paper (18a) to be attached to the structure.