KR20090025744A

KR20090025744A - Door damper

Info

Publication number: KR20090025744A
Application number: KR1020070090827A
Authority: KR
Inventors: 구형서
Original assignee: 구형서
Priority date: 2007-09-07
Filing date: 2007-09-07
Publication date: 2009-03-11

Abstract

A door damper is provided that the damage of door damper is prevented since the safety check valve absorbs impact in case impact more than the design pressure is generated. A door damper comprises a check valve(240) formed between the piston(220) and spring holder(250), and a safety check valve(230) installed inside piston. The safety check valve can be opened in case of receiving pressure more than the design pressure. A body(221) of piston is formed at the upper end of piston. A rod inserting hole(221a) is formed in the upper end of body of the piston.

Description

Door damper {DOOR DAMPER}

The present invention relates to a door damper, and more particularly, a safety check valve is formed therein in case a shock greater than the design pressure is applied to a general door damper that absorbs an impact to safely and quietly close the door. It relates to a door damper.

Generally, the door is attached to a furniture or a sink such as a wardrobe or a bookshelf of a home by a spring hinge so that the door can be easily closed by a small force. There was a danger.

In particular, when a young child inadvertently closes the door inadvertently, there is a problem such as a case in which a finger is caught between the door frame and the door to cause injury.

In order to solve this problem, a door damper as shown in FIG. 9 is conventionally developed.

The conventional door damper has a structure in which oil in the oil chamber can be closed quickly by increasing the flow path when the impact is small by using a check valve, and absorbing the shock by reducing the flow path when the impact is large.

However, since the conventional door damper absorbs the shock only by limiting the flow of oil using the check valve, the following problems occur.

(1) If an impact over the design pressure occurs, it is easily broken.

(2) Tolerance management of check valve is difficult and it does not work properly.

(3) If the oil seal is elapsed for a long time, it may shrink and the oil may spill out.

In order to solve the above problems, the present invention includes a cylindrical body having one side open and a bumper formed at the other side; A return spring inserted into the main body; A spring holder holding the return spring; A piston inserted into the spring holder; A check valve formed between the spring holder and the piston; A piston rod formed on one side of the piston and protruding to the outside of the main body; An oil dispersing opening through which the piston rod penetrates and contacts the piston; A sponge in contact with the oil dispersing opening and having a piston rod penetrated therein and fixed by a bushing; An oil seal formed at an end of the bushing; In the general door damper composed of a cover that blocks the rear of the main body,

In addition to the check valve formed between the piston and the spring holder is characterized in that the safety check valve is formed inside the piston so that the safety check valve can be opened when the pressure exceeds the design pressure.

As described above, according to the door damper of the present invention, the following effects occur.

(1) In the event of an impact above the design pressure, the safety check valve can absorb the shock, preventing damage.

(2) Since the flow path can be adjusted only by the protruding ribs formed on the outer circumference of the check valve, the tolerance management is easy, thus improving the productivity.

(3) Even long-term use does not cause problems such as reduced oil seal or leakage.

1 to 8, the present invention is a cylindrical body 100 having one side is open, the other side bumper 110 is formed; A return spring 210 inserted into the main body 100; A spring holder 250 holding the return spring 210; A piston (220) inserted into the spring holder (250); A check valve 240 formed between the spring holder 250 and the piston 220; A piston rod (120) formed on one side of the piston (220) and protruding out of the main body; An oil dispersing opening 330 through which the piston rod 120 penetrates and is in contact with the piston 220; A sponge 320 in contact with the oil dispersing opening 330 and having a piston rod 120 penetrated therein and fixed by a bushing 310; In the general door damper composed of a cover 410 to block the rear of the body together with the oil seal 420 formed at the end of the bushing 310,

In addition to the check valve 240 formed between the piston 220 and the spring holder 250, a safety check valve 230 is formed inside the piston 220 to receive a pressure higher than the design pressure. It is configured to be open.

The piston 220 is a cylindrical hole formed in the center, the piston body 221 is formed on the upper end, speaking with the piston body 221, the outer diameter of the operation body 222 smaller than the piston body 221 is The insertion body 223 is formed to be spoken with the working body 222 but having an outer diameter smaller than that of the working body 221.

A rod insertion hole 221a is formed at an upper end of the piston body 221, and the rod insertion hole 221a communicates with a boundary between a hole formed in the working body 222 and the insertion body 223 and a step. .

A safety flow path groove 221b is formed in the peripheral portion of the rod insertion hole 221a.

A plurality of flow path grooves 221c are formed at the periphery of the piston body 221, which is generally a flow path through which oil flows, and 4 to 8 are appropriately formed.

The working body 222 is formed with a plurality of protrusions 222a protruding outward from the center of each flow path groove 221c, one less than the number of flow path grooves (221c).

The safety check valve 230 is inserted into the insertion body 223, and the spring holder 250 is inserted while surrounding the end of the safety check valve 230 and the insertion body 223.

The safety check valve 230 is formed of a material having a strong elasticity, a cylindrical valve body 231 is formed in which the side and the rear open groove 231a is formed, the opening in front of the valve body 231 The groove 231a extends, and a cone-shaped operation head 232 having a cut end is formed.

The safety check valve 230 is the other end as shown in Figure 5 to the end of the insertion body 223 of the piston 200, the front and rear open cylindrical to extend the center hole of the insertion body 223 A body portion 235 of the; The body portion 235 and the outer periphery is formed to extend, a cone-shaped operation (236) of the cone (cone) cut in the front is formed, both sides can be cut and communicate with the interior of the body portion (235) It consists of an operation head portion 236 formed to be.

The spring holder 250 has a cylindrical holder body 251, the front of which is inclined toward the front while the diameter is increased and the pressure control hole 254 is formed at the rear; A plurality of ribs 252 protruding laterally at an upper end of the holder body 251; A plurality of holder flow path grooves 253 are formed between the ribs 252 by extending a predetermined portion at the outer circumference of the holder body 251.

The pressure adjusting hole 254 of the holder body 251 is closed by the end of the operation head 232 or the operation portion 236a of the safety check valve 230, and is normally completely closed when operated. When an impact greater than the design pressure is applied, the oil can be pushed out through the inside of the opening 231a or the body 235 while pushing the operation head 232 or the operation 236a of the safety check valve 230. do.

The pressure control hole 254 is set to the excess pressure by the size, the larger the size is to reduce the amount of excess pressure to withstand, the smaller the size is to increase the size of the excess pressure to withstand, the design The pressure refers to a pressure that can be absorbed by the check valve, the safety check valve 230 is operated when the excess pressure greater than the design pressure occurs.

The check valve 240 is formed in a ring shape to flow between the rear of the piston body 221 of the piston 220 and the rib 252 of the spring holder 250, a plurality of protruding ribs 241a at the periphery Check valve body 241 is formed; It consists of a plurality of flow path forming protrusions 242 protruding in front of the check valve body 241 to form a partition.

The protruding rib 241a protrudes very low in order to improve the problem caused by the tolerance, but is formed so as to close the flow path in close contact with the inner circumference of the main body 100 regardless of the tolerance. The design pressure can be set by adjusting the number of 241a.

The check valve 240 is expanded to the outside by the instantaneous oil when the impact occurs, it is formed to absorb the impact by blocking a part of the oil exiting through the flow path groove 221c of the piston 220. do.

The bushing 310 is inserted into the center of the sponge 320, and an oil dispersing hole 330 is formed at the end of the sponge 320 to be coupled to the end of the bushing 310.

The bushing 310 has a hole formed in the center thereof, and a guide body 312 is formed at the rear of the circular front body 311, and a seal fixing jaw 313 protruding from the front surface of the front body 311. Is formed.

The seal fixing jaw 313 may support the inside of the oil seal 420 to serve to prevent the oil seal 420 from contracting even when used for a long time.

The cover 410 is formed in the center hole, the outer periphery is formed in a cylindrical shape to support the front of the oil seal 420 at the same time to close the rear with the main body 100, the projection protruding to the rear 411 is formed.

As described above, the oil seal 420 is not contracted by the seal fixing jaw 212 and the cover protrusion 411 of the bushing 310 inserted into the inside from the front and the rear of the oil seal 420.

Hereinafter, the operation of the door damper formed by the preferred embodiment of the present invention.

The door damper of the present invention is mounted on the case or the hinge portion of the door, and when the door is opened, the return spring 210 is pushed back to push the piston 220, the oil passes through the holder flow path 253, the check valve After each of the protruding ribs 241a of the 240 and the protruding portion 222a of the piston 220, the oil moves through the flow path groove 221c of the piston 220.

When the door is closed, the oil moves in the opposite direction and closes. If the door is closed suddenly (within the design pressure), the check valve 240 expands and flows to the outer circumference by the lowered protrusion rib 241a. The oil is almost blocked, and the flow path forming protrusion 242 in front of the check valve 240 is also closely adhered to the rear of the piston body 221 of the piston 220, so that the flow path is narrowed, thereby alleviating impact.

If the door is closed with an excess pressure above the design pressure, the check valve 240 expands, and the operation of the safety check valve 230 pushes the operation head 232 or the operation portion 236a, thereby causing the holder euro groove 235 to be pushed. By allowing the oil to flow into the interior of the spring holder 250 and the piston 220 to escape into the safety flow path groove 221b, the pressure within the maximum excess pressure can be tolerated.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various modifications may be made therein without departing from the scope of the invention, which is covered by the following claims.

1 is a perspective view of a door damper formed in a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of a door damper formed by a preferred embodiment of the present invention.

Figure 3 is a perspective view of the piston of the door damper formed in a preferred embodiment of the present invention.

Figure 4 is a perspective view of the safety check valve of the door damper formed in a preferred embodiment of the present invention.

Figure 5 is another perspective view of the safety check valve of the door damper formed in a preferred embodiment of the present invention.

Figure 6 is a perspective view of the check valve of the door damper formed in a preferred embodiment of the present invention.

Figure 7 is a perspective view of the spring holder of the door damper formed in a preferred embodiment of the present invention.

8 is a conceptual view showing the operation of the door damper formed by a preferred embodiment of the present invention.

9 is a cross-sectional view of a conventional door damper.

** <Description of the symbols for the main parts of the drawings> **

100: body 110: bumper

120: load 210: return spring

220: piston 230: safety check valve

240: check valve 250: spring holder

310: bushing 320: sponge

330: oil dispersing sphere 410: cup

420: oil seal

Claims

One side is open, the other side and the cylindrical body 100 is formed bumper 110; A return spring 210 inserted into the main body 100; A spring holder 250 holding the return spring 210; A piston (220) inserted into the spring holder (250); A check valve 240 formed between the spring holder 250 and the piston 220; A piston rod (120) formed on one side of the piston (220) and protruding out of the main body; An oil dispersing opening 330 through which the piston rod 120 penetrates and is in contact with the piston 220; A sponge 320 in contact with the oil dispersing opening 330 and having a piston rod 120 penetrated therein and fixed by a bushing 310; In the general door damper composed of a cover 410 to block the rear of the body together with the oil seal 420 formed at the end of the bushing 310,

In addition to the check valve 240 formed between the piston 220 and the spring holder 250, a safety check valve 230 is formed inside the piston 220 to receive a pressure higher than the design pressure. Door damper, characterized in that configured to open.

The method of claim 1,

The piston 220 is a cylindrical hole formed in the center, the piston body 221 is formed on the upper end, speaking with the piston body 221, the outer diameter of the operation body 222 smaller than the piston body 221 is Is formed, the door damper characterized in that the speech body and the insertion body 223, the outer diameter is smaller than the working body 221 is formed.

The method of claim 2,

The rod insertion hole (221a) is formed on the upper end of the piston body (221), the door damper, characterized in that the safety passage groove (221b) is formed in communication with the peripheral portion of the rod insertion hole (221a).

The method of claim 2 or 3,

Door damper, characterized in that the four to eight flow path grooves (221c) are formed in the peripheral portion of the piston body (221).

The method of claim 1,

The spring holder 250 is inclined toward the front while the diameter is larger and the front is opened, the holder holder 251 of the cylindrical which is formed with a pressure control hole 254 in the rear; A plurality of ribs 252 protruding laterally at an upper end of the holder body 251; Door ribper, characterized in that at least one holder euro groove 253 is formed between the ribs 252 is extended by a predetermined portion to the outer circumference of the holder body (251).

The method of claim 1,

The check valve 240 is formed in a ring shape to flow between the rear of the piston body 221 of the piston 220 and the rib 252 of the spring holder 250, at least one protruding rib at the periphery A check valve body 241 formed with 241a; Door damper, characterized in that consisting of at least one passage forming protrusion 242 protruding in front of the check valve body 241 to form a partition.

The method of claim 1,

The safety check valve 230 is formed of a material having a strong elasticity, a cylindrical valve body 231 is formed in the open groove 231a is formed on the side, the opening groove (in front of the valve body 231) 231a) is extended, and the door damper, characterized in that the cone-shaped operation head (232) is formed is cut end.

The method of claim 1,

The safety check valve 230 is spoken at the end of the insertion body 223 of the piston 200, the body portion 235 of the front and rear open so that the center hole of the insertion body 223 is extended; The body portion 235 and the outer periphery is formed to extend, a cone-shaped operation (236) of the cone (cone) cut in the front is formed, both sides can be cut and communicate with the interior of the body portion (235) Door damper, characterized in that consisting of the operation head portion 236 formed to be.

The method of claim 1,

The bushing 310 has a hole formed in the center, the guide body 312 is formed to the rear of the cylindrical front body 311, the seal fixing jaw 313 protruding on the front surface of the front body 311 Door damper, characterized in that formed.

The method of claim 1,

The cover 410 is formed in the center hole, the outer periphery is formed in a cylindrical shape to support the front of the oil seal 420 at the same time to close the rear with the main body 100, the projection protruding to the rear Door damper, characterized in that the 411 is formed.