KR101978611B1 - Soft damper - Google Patents

Abstract

The present invention relates to a soft damper device, including: a guide bracket (30) having a side guide groove (32); a button (40) in which a back portion side moves in the side guide groove (32); a piston (50) including an adhering long shaft (52), a short shaft (53), a head edge (54), a plurality of first and second head flow path holes (55, 56) and a check groove (57); a main spring (60) applying elastic force to the piston (50) in a direction of the button (40); a washer (70) inserted into the short shaft (53); and a check valve ring (80) passing a relatively small quantity of oil through the second head flow path hole (56) communicating with the check groove (57).

Description

Soft damper

The present invention relates to a soft damper device, and more particularly, to a soft damper device to close smoothly and slowly without repulsion when the door is closed.

In general, the main body of the dryer or the washing machine is provided with a door for opening and closing, wherein the door is connected by a hinge device that provides a damping force by a combination of a spring and a cam therein so that the door closes smoothly and slowly. Prior art for such a hinge device is disclosed in the patent application No. 10-2010-50281 filed by the applicant of the hinge device of the washing machine door.

However, as the size of the washing machine is increased, the size of the door is also increased in size and weight, and the impact amount generated in the process of closing the door strongly is often larger than the damping force that the hinge device can accommodate. Repulsion occurred after the door was closed from the main body by the shock generated when closing. Therefore, there is a growing need for a damper device that effectively absorbs the shock generated in the process of opening and closing a door that is gradually enlarged and weighted.

SUMMARY OF THE INVENTION The present invention has been made to meet the above necessity, and an object of the present invention is to provide a soft damper device that can prevent the door from repulsing to the main body when the door is enlarged and weighted or when the door is strongly closed. It is done.

In order to achieve the above object, the soft damper device according to the present invention,
A coupling hole 11 opened toward the inlet side, a cylinder 12 having a smaller inner diameter than the coupling hole 11 and filled with damping oil, and extending from the cylinder 12 to the coupling hole 11 side; A fixed housing 10 including a partition groove 14 formed by the cylinder partition wall 13; A cover 20 which is coupled to the mouth of the fixed housing 10 and has a cover through-hole 21 penetrating therein; A guide bracket which is coupled to the coupling hole 11 in a seal state and has a center guide hole 31 penetrating through the center and side guide grooves 32 formed outside the center guide hole 31. 30; A button 40 which protrudes or immerses through the cover through hole 21 and moves from the side guide groove 32 to a rear side thereof; The piston head 51 in close contact with the inner circumferential surface of the cylinder 12, the long shaft 52 extending in one side of the piston head 51 and in close contact with the inner end of the button 40, the piston head 51. The short shaft 53 extending to the other side of the head, the head rim 54 protruding from the edge surface of the piston head 51 on the side of the short shaft 53, and the piston head 51 inside the head rim 54 A plurality of first and second head passage holes 55 and 56 penetrating through the surface of the piston head 51 and formed between the second head passage hole 56 and an inner surface of the head border 54. The head seal 58 is inserted into the check groove 57 and the head groove 51a formed on the outer circumferential surface of the piston head 51 to maintain a seal state between the piston head 51 and the cylinder 12. Piston 50 including; A main spring (60) embedded in the cylinder (12) for applying an elastic force to the piston (50) in the direction of the button (40); A washer (70) fitted to the short shaft (53); A relatively large amount of oil passes through the first and second head passage holes (55, 56) according to the moving direction as supported by the short shaft (53). A check valve ring (80) for passing a relatively small amount of oil through the second head passage hole (56) communicating with the check groove (57); And an accumulator 100 installed in the partition groove 14 to accumulate oil corresponding to the amount of space change in the cylinder 12 generated as the long shaft 52 enters the cylinder 12. Characterized in that it comprises a.

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In the present invention, the guide bracket 30, the stepped accommodation groove 34 is formed stepped on the inner circumferential surface of the center guide hole 31 and the stepped accommodation in the state fitted to the outer peripheral surface of the long shaft 52 A sub-sealing 35 which is accommodated in the groove 34 and maintains between the outer circumferential surface of the long shaft 52 and the inner circumferential surface of the stepped accommodation groove 34 during the movement of the piston 50, and the long shaft ( 52 and a disk 36 which prevents the sub-sealing 35 from being separated from the stepped accommodation groove 34 by being caught by the cylinder partition 13 of the fixed housing.

In the present invention, the check valve ring 80 is located inside the head rim 54 and is smaller than the inner diameter D2 of the head rim 54 and the first and second head passage holes (2). 55) have an outer diameter D1 sufficient to cover 56 simultaneously.

In the present invention, the elastic force in the direction in which the check valve ring 80 is in close contact with the piston head 51 as being fitted to the short shaft 53 between the check valve ring 80 and the washer 90. It further comprises a check spring 90 for applying a.

According to the present invention, when the door is closed, the oil may slowly pass through the check groove and the second head passage hole to absorb the impact applied from the door to allow the door to be closed smoothly, and conversely, when the door is opened, the first and second head passages The hole can pass a large amount of oil, allowing the button to open the door quickly.

In addition, by the above structure, when the door becomes large and heavy, or when the door is strongly closed, the door can be prevented from repulsing to the main body.

1 is an exploded perspective view of a soft damper device according to the present invention;
Figure 2 is an assembled perspective view of the soft damper device of Figure 1,
3 is a cross-sectional view along the line III-III 'of FIG.
4 is a cross-sectional view of the fixed housing of FIG.
5 is a perspective view of the piston of FIG.
6 is a view for explaining the first and second head passage hole and the check groove formed in the piston head of FIG.
7 is a view for explaining the inner diameter of the head rim and the outer diameter of the check valve ring of the piston of FIG.
8 is a view for explaining the flow of oil when the button is pressed in the damper device of FIG.
9 is a view for explaining the flow of oil when the button is restored to the initial position in the damper device of FIG.

Hereinafter, a soft damper device according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, what is described as "upper" or "upper" may include not only directly over and in contact but also overlying. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are only used to distinguish one component from another. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated. In addition, the terms "...", "module", etc. described in the specification mean a unit that processes at least one function or operation.

1 is an exploded perspective view of the soft damper device according to the present invention, FIG. 2 is an assembled perspective view of the soft damper device of FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III ′ of FIG. 2, and FIG. 4 is FIG. Sectional view of the fixed housing. 5 is a perspective view of the piston of Figure 1, Figure 6 is a view for explaining the first and second head passage hole and the check groove formed in the piston head of Figure 5, Figure 7 is a head rim of the piston of Figure 5 It is a figure for demonstrating an inner diameter and the outer diameter of a check valve ring.

Soft damper device according to the invention, the fixed housing 10, the cover 20, the guide bracket 30, the button 40, the piston 50, the main spring 60, the washer 70, the check valve ring 80, the check spring 90, the accumulator 100, and the caulking ring 111 are coupled to the caulking screw 110.

As shown in FIG. 4, the fixed housing 10 is installed in a main body supporting a door (not shown), for example, a dryer or a washing machine main body, and a coupling hole 11 opened toward an inlet side thereof, and a combination thereof. A cylinder 12 having an inner diameter smaller than the hole 11 and filled with oil, a cylinder partition 13 extending from the cylinder 12 toward the coupling hole 11 to form a partition groove 14 on the outside thereof, A flow path groove 15 is formed at an end of the cylinder partition wall 13 to communicate the cylinder 12 and the partition groove 14. An oil injection hole 16 to which the caulking screw 110 is coupled is formed at the bottom side of the fixed housing 10, and a highly viscous damping oil is filled in the cylinder 12 through the oil injection hole 16.

The cover 20 is coupled to the mouth of the fixed housing 10 and has a cover through-hole 21 penetrating therein.

As shown in FIG. 3, the guide bracket 30 is coupled to the coupling hole 11 in a seal state, and includes a center guide hole 31 and a center guide hole 31 penetrating through the center thereof. It has a side guide groove 32 formed on the outside. In addition, the bracket groove 30a formed on the outer circumferential surface of the guide bracket 30 is provided with a main sealing 33 for maintaining the coupling hole 11 and the seal state. The guide bracket 30 is coupled to the coupling hole 11 while the long shaft 52 penetrates, such that oil stored in the cylinder 12 is not leaked toward the button 40.

The button 40 is projected or immersed through the cover through-hole 21, and the rear side is caught in the periphery of the cover through-hole 21 while moving in the side guide groove 32, thereby preventing the detachment. At this time, at the rear side end of the button 40, the button jaw 41 is formed to cover the periphery of the cover through-hole 21 is prevented from being separated.

Piston 50, as shown in Figures 5 to 7, the piston head 51 in close contact with the inner peripheral surface of the cylinder 12, and extends to one side of the piston head 51 to the button 40 Long shaft 52 in close contact with the inner end of the head, the short shaft 53 extending to the other side of the piston head 51, and the head protruding from the edge surface of the piston head 51 on the short shaft 53 side The second head as formed on the rim 54, the plurality of first and second head passage holes 55 and 56 penetrating the piston head 51 inside the head rim 54, and the piston head 51 surface. The piston head 51 and the cylinder 12 are fitted to the check groove 57 formed between the flow path hole 56 and the inner surface of the head rim 54 and the head groove 51 a formed on the outer circumferential surface of the piston head 51. Head seal 58 to maintain a seal state between the < RTI ID = 0.0 >

The long shaft 52 is extended to the inside of the button 40 and then coupled to press the piston 50 when the button 40 is pressed. The long shaft 52 moves together with the button 40 when the button 40 moves in a direction protruding from the cover 20 by the main spring 60 to be described later.

On the outer circumferential surface of the short shaft 53, a washer groove 53a into which the washer 70 is fitted is formed.

The head rim 54 protrudes from the edge of the piston head 51 toward the check valve ring 80 so that the check valve ring 80 is positioned inside the head rim 54. In this case, the outer diameter D1 of the check valve ring 80 is smaller than the inner circumferential surface D2 of the head rim 54 and covers the first and second head passage holes 55 and 56, as shown in FIG. 7. It is about the size. Accordingly, when the check valve ring 80 is in close contact with the surface of the piston head 51, the check valve 80 covers the first and second head channel holes 55 and 56, in which case the oil is the second head channel. It flows through the check groove 57 in communication with the hole 56.

Here, the piston head 51 divides the inside of the cylinder 12 into a first damping space A at the front side of the piston head 51 and a second damping space B at the rear side of the piston head 51, and the piston head. The oil moves between the first damping space A and the second damping space B according to the movement position of the 51 to generate a damping force. Therefore, the volume of the first damping space A and the second damping space B depends on the degree of movement of the oil.

On the other hand, the guide bracket 30, as shown in Figure 3, the step guide receiving groove 34 is formed stepped on the inner circumferential surface of the center guide hole 31 and the stepped acceptance in the state of being fitted to the outer peripheral surface of the long shaft 52 To the sub-sealing 35 and the long shaft 52 which are accommodated in the groove 34 and hold between the outer circumferential surface of the long shaft 52 and the inner circumferential surface of the stepped accommodation groove 34 during the movement of the piston 50. The disk 36 may be further included to prevent the sub-sealing 35 from being separated from the step accommodating groove 34 by being caught and spanning the cylinder partition wall 13 of the fixed housing. By this configuration, the sub-sealing 35 maintains the seal between the outer circumferential surface of the long shaft 52 and the inner circumferential surface of the step receiving groove 34 while the piston 50 is moving, and at the same time, the disk 36 is moved by the disk 36. It will not be separated from the stepped accommodation groove 34.

The main spring 60 is embedded in the cylinder 12 to apply an elastic force to the piston 50 in the direction of the button 40.

The washer 70 is inserted into the washer groove 53a of the short shaft 53 to prevent the check valve ring 80 and the check spring 90 which will be described later from being separated.

The check valve ring 80 is supported by the short shaft 53 and simultaneously opens the first and second head passage holes 55 and 56 and the check groove 57 according to the moving direction, or the check groove 57. By opening the second head passage hole 56 through the oil, a relatively small amount or a large amount of oil passes between the first and second damping spaces (A) and (B).

The check valve ring 80, as described above, is located inside the head rim 54, and is smaller than the inner diameter D2 of the head rim 54, and the first and second head passage holes 55 and 56, respectively. ) Has an outer diameter (D1) to cover at the same time. Accordingly, the check valve ring 80 passes a relatively large amount of oil through the first and second head passage holes 55 and 56 according to the direction in which the check valve ring 80 moves between the piston head 51 and the washer 70. The other damping force is generated by passing a relatively small amount of oil through the second head passage hole 56 communicating with the check groove 57.

In more detail, when the piston 50 is pressed by the button 40, the check valve ring 80 pressurized by the oil stored in the cylinder 12 may include the first and second head passage holes 55 ( 56, the entrance is closed at the same time, and thus the first damping space A and the second damping space B communicate only with the check groove 57 and the second head channel hole 56. Accordingly, since only a small amount of oil passes through the check groove 57 and the second head channel groove 56 to the second damping space B, the piston 50 is slowly pressed. It becomes rear.

On the contrary, when the piston 50, which is pressed down, moves to the initial position, the oil in the second damping space B is discharged through the plurality of first and second head passage holes 55 and 56, and the check valve ring 80 ) Is pushed toward the washer 70, so that the oil in the second damping space (B) is quickly moved to the first damping space (A) space, so that the piston 50 quickly returns to its original position.

The check spring 90 is inserted into the short shaft 53 between the check valve ring 80 and the washer 90 to apply an elastic force in a direction in which the check valve ring 80 is in close contact with the piston head 51. do. Since the check spring 90 maintains the state in which the check valve ring 80 is in close contact with the piston head 51, only a certain amount of oil is passed through the check groove 57, so that a reliable damping operation can be expected. have.

As shown in FIG. 3, the accumulator 100 is installed in the partition groove 14 outside the cylinder partition 13 and is formed in the cylinder 12 generated as the long shaft 52 enters the cylinder 12. Accumulate oil corresponding to the amount of space change. The accumulator 100 is preferably made of an elastic porous material having excellent absorbency, for example, an EVA material so as to absorb or discharge oil.

The caulking screw 110 is hermetically coupled to an oil injection hole 16 formed at the bottom of the fixed housing 10 by a caulking ring 111 coupled to an outer circumferential surface thereof. The oil filled by the caulking screw 110 can be prevented from leaking to the front side, it is also possible to easily fill the oil.

8 is a view for explaining the flow of oil when the button is pressed in the damper device of Figure 3, Figure 9 is a flow of oil when the button returns to the initial position in the damper device of Figure 8 It is a figure for demonstrating.

Based on the state of FIG. 3, when the door is closed, the button 40 is pressed. The pressed button 40 presses the piston 50 in the direction of the arrow as shown in FIG. 8. The oil filled in the first damping space A of the cylinder 12 presses the check valve ring 80 to cover the first and second head passage holes 55 and 56 at the same time, and thus the first damping space. (A) and the second damping space (B) communicate only through the check groove (57) and the second head passage hole (56). Accordingly, since the oil in the first damping space A moves little by little into the second damping space B through the check groove 57 and the second head channel groove 56, the piston 50 is the cylinder 12. Move slowly from the inside

On the contrary, when the door is opened, as shown in FIG. 9, the button 40 protrudes from the cover 20 while the main spring 60 that is pressed expands. Then, the oil in the second damping space (B) is discharged through the plurality of first and second head passage holes 55 and 56 to push the check valve ring 80 toward the washer 70. The head passages 55 and 56 are all open so that the oil in the second damping space B is quickly moved to the first damping space A space, and the piston 50 quickly returns to its original position, and the button 40 Return to the initial position within this short time.

As described above, according to the present invention, when the door is closed, the oil slowly passes through the second head passage hole 55 and the check groove 57 to absorb the shock applied from the door so that the door can be closed smoothly. When opened, the first and second head passage holes 55 and 56 allow a large amount of oil to pass through so that the button 40 can quickly open the door.

In addition, by the above structure, when the door becomes large and heavy, or when the door is strongly closed, the door can be prevented from repulsing to the main body.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

10 ... fixed housing 11 ... mating hole
12 ... cylinder 13 ... cylinder bulkhead
14 ... bulkhead groove 15 ... euro groove
16 ... oil filling hole 20 ... cover
21 ... Cover through hole 30 ... Guide bracket
31 ... center guide hole 32 ... side guide groove
33 ... main sealing 34 ... step receptacle
35 ... Subsealing 36 ... Disc
40 ... button 41 ... button jaw
50 ... piston 51 ... feettone head
52 ... Long Shaft 53 ... Short Shaft
54 ... head rim 55, 56 ... 1,2 head euro hole
57 ... check groove 58 ... head sealing
60 ... main spring 70 ... washer
80 ... check valve ring 90 ... check spring
100 ... accumulator 110 ... caulking screw
111 ... caulking ring

Claims (5)

A coupling hole 11 opened toward the inlet side, a cylinder 12 having a smaller inner diameter than the coupling hole 11 and filled with damping oil, and extending from the cylinder 12 to the coupling hole 11 side; A fixed housing 10 including a partition groove 14 formed by the cylinder partition wall 13;
A cover 20 which is coupled to the mouth of the fixed housing 10 and has a cover through-hole 21 penetrating therein;
A guide bracket which is coupled to the coupling hole 11 in a seal state and has a center guide hole 31 penetrating through the center and side guide grooves 32 formed outside the center guide hole 31. 30;
A button 40 which protrudes or immerses through the cover through hole 21 and moves from the side guide groove 32 to a rear side thereof;
The piston head 51 in close contact with the inner circumferential surface of the cylinder 12, the long shaft 52 extending in one side of the piston head 51 and in close contact with the inner end of the button 40, the piston head 51. The short shaft 53 extending to the other side of the head, the head rim 54 protruding from the edge surface of the piston head 51 on the side of the short shaft 53, and the piston head 51 inside the head rim 54 A plurality of first and second head passage holes 55 and 56 penetrating through the surface of the piston head 51 and formed between the second head passage hole 56 and an inner surface of the head border 54. The head seal 58 is inserted into the check groove 57 and the head groove 51a formed on the outer circumferential surface of the piston head 51 to maintain a seal state between the piston head 51 and the cylinder 12. Piston 50 including;
A main spring (60) embedded in the cylinder (12) for applying an elastic force to the piston (50) in the direction of the button (40);
A washer (70) fitted to the short shaft (53);
A relatively large amount of oil passes through the first and second head passage holes (55, 56) according to the moving direction as supported by the short shaft (53). A check valve ring (80) for passing a relatively small amount of oil through the second head passage hole (56) communicating with the check groove (57); And,
An accumulator (100) installed in the partition groove (14) and accumulating oil corresponding to the amount of space change in the cylinder (12) generated as the long shaft (52) enters the cylinder (12); Soft damper device comprising a. delete The method of claim 1, wherein the guide bracket 30,
The step guide receiving groove 34 is formed to be stepped on the inner circumferential surface of the center guide hole 31, and is accommodated in the step receiving groove 34 in a state of being fitted to the outer circumferential surface of the long shaft 52. The sub-sealing 35 which keeps between the outer circumferential surface of the long shaft 52 and the inner circumferential surface of the stepped accommodation groove 34 during the movement, and the cylinder partition wall 13 of the fixed housing by being fitted to the long shaft 52. And a disk (36) for preventing the sub-sealing (35) from being separated from the step receiving groove (34). According to claim 1, wherein the check valve ring 80,
Located outside the head rim 54, the outer diameter (D1) is smaller than the inner diameter (D2) of the head rim 54 to cover the first and second head passage holes (55, 56) at the same time Soft damper device characterized in that it has a). The method of claim 1,
The check spring is applied to the short shaft 53 between the check valve ring 80 and the washer 70 and applies a spring force in a direction in which the check valve ring 80 is in close contact with the piston head 51. Soft damper device, characterized in that it further comprises (90).

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