WO2013115458A1

WO2013115458A1 - Single hinge damping device for doors of home appliances

Info

Publication number: WO2013115458A1
Application number: PCT/KR2012/008612
Authority: WO
Inventors: 정민동; 김종훈; 김기병; 조덕제
Original assignee: 동우정밀(주)
Priority date: 2012-02-02
Filing date: 2012-10-19
Publication date: 2013-08-08
Also published as: KR20130089456A; KR101343915B1

Abstract

The present invention relates to a hinge damping device for opening and closing swing opening-type doors or covers of various home appliances including home bar doors of refrigerators, and to a single hinge damping device for doors, wherein the single hinge damping device is designed to obtain sufficient damping power even with one damping device, to have excellent lifting power with low impact due to a fast and smooth opening and closing operation of a door, and to provide a simple structure and superior durability. Disclosed is a single hinge damping device for doors of home appliances, and comprises: a body which has damping oil included therein and a cam accommodation unit; a lower cam which includes a body having the center on which an aperture is vertically penetrated, a first inclined cam body and a second inclined cam body formed at the top end of the body and have inclined surfaces; a rotary shaft which includes a head unit having a hinge shaft coupling hole formed thereon, and a shaft unit having a check screw accommodation groove and a check valve accommodation groove formed therein, so that the rotary shaft is inserted and coupled in the aperture on the center of the lower cam; an upper cam which is coupled with the outer diameter of the rotary shaft, and which has the first inclined cam body and the second inclined cam body having inclined surfaces formed at the bottom end thereof; a main spring which is coupled with the lower part of the lower cam, and which is embedded in the cam accommodation unit of the body; and a check valve which is provided in the check valve accommodation groove in the rotary shaft, and which includes an upper ball and a check spring for providing elastic force from the lower part of the ball

Description

Single hinge damping device for home appliance door

The present invention relates to a hinge damping device for applying to a hinged door of a home appliance, and in particular, the opening and closing operation is performed smoothly, and the structure is simple while being able to attenuate the shock at the time of opening is easy to manufacture and durable A superior hinged single hinge damping device.

Recently, a double-door refrigerator, which has a relatively large volume of contents and easily distinguishes between a freezer compartment and a refrigerating compartment, has become popular and is becoming a mainstream refrigerator.

A home bar door is generally attached to one door or both doors of the double door refrigerator so as to withdraw beverages to be used at any time without opening the entire main door of the refrigerator.

Most of the home bar doors are opened and closed by vertical rotation, and hinge devices are attached to both ends of the lower ends, and door latches and latch hooks are formed on the upper ends.

Therefore, when the user presses the top of the home bar door, the upper latch of the home bar door is opened, and then the home bar door can be prevented from being suddenly rotated and opened by the hinge damping mechanism.

In most cases, hinge shafts are inserted at both side ends of the bottom of the home bar door, and a hinge damping mechanism coupled to the hinge shaft is embedded in the inner wall of the main door of the refrigerator, thereby rapidly opening the home bar door to the hinge device. It is designed to prevent the impact from being applied.

As the damping means for the door hinge, various kinds are disclosed as products and patent documents. Patent No. 10-0875475, "Hinge assembly for a home bar door of a refrigerator, and a refrigerator using the same." Examples are 1029861 "Damper Assemblies for Door Hinges", Patent No. 10-0933951 "Slim Damper Hinges for Appliances", and Patent No. 10-1044377 "Slim Damper Hinges for Appliances".

The first registered patent is the applicant's patent, which imparts a damping force to the hinge by friction and fluid pressure with the inner wall of the housing of the blade rotating by the hinge axis, and the second patent is also a registered patent of the applicant. A technique for applying a damping force to a hinge using a pair of torsion springs is disclosed.

The third patent discloses a configuration for adjusting the damping force by the discharge or inflow of the fluid pressure through the one-phase check valve formed in the rotary piston as a slim damping device.

The fourth patent is likewise related to a slim damping device, and discloses a configuration for obtaining a damping force by controlling the amount of damping fluid flowing through the check valve by converting the rotational motion of the cam drive into a linear motion of the rod. have.

However, these conventional damping means have a small amount of torsion force or damping fluid pressure of the torsion spring inserted therein, and it is common to use a pair of both ends of the lower end of the home bar door or the like.

In addition, the conventional hinge damping means have a problem that the reliability is lowered by repeated use when using the torsion spring, the durability quality is lowered when the fluid pressure and the friction force is used and the reliability is lowered during long-term use.

Therefore, it is necessary to develop a hinge damping device such as a home bar door that has a simple internal structure and can effectively attenuate the impact on the hinge even when the home bar door is opened suddenly while having a small lifting force when the home bar door is closed. It became.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hinge damping device having sufficient damping force to prevent the home bar door or the like from unexpectedly opening unexpectedly and to operate slowly and smoothly at the beginning of the door opening and at the end of the opening operation. For that purpose.

In addition, the present invention is to provide a hinge damping device having an emotional quality that can operate smoothly during the opening operation of the door, as well as the lifting force is not large even when closing the door can be closed smoothly with a small force.

In addition, the present invention is to provide a hinge damping device having a sufficient damping force and smooth operation performance, the internal structure is simple and the operation reliability is not degraded by repeated use.

In the present invention for achieving the above object, a damping oil is included therein, the body having a cam receiving portion; A lower cam formed of a first inclined cam body and a second inclined cam body having an inclined surface formed on an upper end of the body and an open hole penetrating up and down at a center thereof; A rotating shaft including a head portion in which a hinge shaft coupling hole is formed and a shaft portion in which a check screw receiving groove and a check valve receiving groove are formed, and inserted into and coupled to a central opening of the lower cam; An upper cam coupled to an outer diameter portion of the rotary shaft, the upper cam having a first inclined cam body and a second inclined cam body having an inclined surface formed at a lower end thereof; A main spring coupled to a lower side of the lower cam and embedded in a cam receiving portion of the body; And a check valve mounted to the check valve receiving groove of the rotary shaft, the check valve comprising an upper ball and a check spring for imparting elastic force to the lower side of the ball. do.

Here, the inclined surfaces formed on the first inclined body and the second inclined body of the lower cam, respectively, are continuously formed at an upper end of the first inclined surface and the first inclined surface which are formed to be inclined upward with respect to a horizontal plane, rather than the first inclined surface. It is preferable that the second inclined surface is formed to be inclined upward so that the inclination angle is large.

On the other hand, a check screw consisting of a screw head formed on the upper surface and a screw rod formed on the outer circumferential surface of the check screw receiving groove located in communication with the upper check valve receiving groove in the rotary shaft is coupled to the screw coupling .

Here, the O-ring coupling grooves are formed on the outer circumferential surfaces of the upper cam and the lower cam, respectively, and the O-ring is mounted therein, and the fluid passage hole communicating with the damping oil passage therein is formed in the shaft portion of the rotary shaft.

Each of the first and second inclined bodies of the lower cam has a lower flat surface flat to the bottom surface, a first inclined surface formed to be inclined with respect to the bottom surface, a second inclined surface that is steeper than the first inclined surface, and a bottom surface. A flat upper flat surface and a stopper surface perpendicular to the bottom surface are formed in succession, and each of the first and second inclined cam bodies of the upper cam is a stopper surface perpendicular to the bottom surface and a flat flat surface relative to the bottom surface. And it is preferable that the inclined surface formed to be inclined with respect to the bottom surface in order to be continuous.

The present invention eliminates the use of a torsion spring, which has a large drop in elastic force due to frequent use, has a limitation in torsion force due to the limitation of the housing size, and introduces a main spring having a compressive elastic force and compresses the main spring. The damping force is generated by using the spring compression force generated by the relative cam surface cam motion of the cam and the fluid pressure of the damping oil, so that the opening and closing of the door is performed smoothly and the sudden opening and closing shock can be prevented.

In particular, in the present invention, the components such as the main spring, the check valve, the upper cam and the lower cam, which are internal components, are disposed to make the best use of the limited size of the housing or the body, and damped by using the stable compression force and the fluid pressure of the main spring. Since the force is adjusted, the damping force is large compared with conventional hinge damping devices having the same size. Therefore, even if the hinge damping device, which was conventionally installed in pairs at both ends of the lower end of the door, is provided at only one of both ends of the lower end of the door, sufficient damping force can be obtained, thereby reducing manufacturing cost and installation cost. It works.

In the present invention, the inclined cam body of the lower cam by successively forming the inclined surface with different inclination angle to open the door quickly at the beginning of the opening and to close slowly falling over a certain angle, when closing the door has a small lifting force Even if the door closes smoothly, the function and the emotional quality are very good.

In addition, the present invention has the advantage that the component is composed of several large units, the structure is simple, easy to manufacture and assembly, and excellent durability due to the simple assembly structure does not break well.

1 is an external perspective view of a single hinge damping device according to the present invention.

Figure 2 is an exploded perspective view of the single hinge damping device of Figure 1;

Figure 3 is an external perspective view of the lower cam of the present invention.

4 is a front view, a plan view, a bottom view and a sectional view of FIG.

Figure 5 is an external perspective view of the rotating shaft of the present invention.

6 is a front view, a plan view and a longitudinal cross-sectional view of FIG.

Figure 7 is an external perspective view of the upper cam and the rotary shaft assembly of the present invention.

8 is a front view, a plan view, a bottom view and a longitudinal sectional view of FIG.

9 is a plan view and a front view of the check screw of the present invention.

Figure 10 is a longitudinal sectional view for explaining the operation principle of the single hinge damping device of the present invention.

Fig. 11 is a partially enlarged view of the upper and lower cam portions of the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration and operation principle of the present invention will be described in detail.

1 is an external perspective view of a single hinge damping device according to the present invention, Figure 2 is an exploded perspective view of the single hinge damping device of FIG.

The single hinge damping device (100, hereinafter abbreviated as a single hinge damping device for convenience of description) of the door of a household appliance according to the present invention basically accommodates the upper and lower cams and has a damping fluid or damping oil therein. Body 110, which is a housing for filling, upper cam and

lower cams

150 and 140 accommodated in the body 110, a rotating shaft 160 inserted through a central portion of the upper cam 150, and Opening of the main spring 121 coupled to the lower cam 140, the check valve 130 and ball body 132 mounted inside the rotary shaft 160 and the check valve 130 and the body 110. The cover 180 is formed by covering the finished top.

The body 110 has a cam receiving portion 111, which is a hollow portion for accommodating a fluid such as damping oil and the upper and

lower cams

150 and 140, is formed therein. The coupling part 112 is fixed to the inside of the coupling. In the drawings, reference numeral 112a denotes a fastening hole for coupling with a screw and the like, and 110a indicates a fastening hole for coupling by a cover 180 and a screw 192 which will be described later.

In the inner cam receiving portion 111 of the body 110, the main shaft 121 is coupled to the upper cam of the lower cam 140 and the lower cam 140 is fixed therein is inserted into the rotating shaft 160 The upper cam 150 is received.

The rotation shaft 160 inserted through and coupled to the center portion of the upper cam 150 includes a check valve 130 including a ball 132 and a check spring 131 positioned below the ball.

O-

rings

193 and 194 are coupled to the outer circumferential surfaces of the upper cam 150 and the lower cam 140 to prevent leakage of damping oil.

The washer 191 is coupled to the upper surface of the mall upper cam 150, and the exposed upper portion of the body is closed by the cover 180.

Hereinafter, each component described above will be described in more detail. 3 is an external perspective view of the lower cam of the present invention, and FIG. 4 is a front view, a plan view, a bottom view, and a sectional view of FIG.

The lower cam 140 of the present invention has a substantially cylindrical shape as the main spring 121 is coupled to the lower side inside, and a plurality of

inclined cam bodies

141 and 142 are formed on the upper surface.

The cylindrical body 143 is formed with an opening penetrating up and down the center portion, a plurality of fluid passage holes (143a) is formed in the outer peripheral surface to open by cutting. As shown in FIG. 4C, the inner side of the body 143 has a small inner diameter of the first partition 144a and a second bulkhead 144b having a relatively large diameter outside the first partition 144a. It is formed to protrude downward.

A circular separation space is formed between the first partition wall 144a and the second partition wall 144b, which is called a main spring coupling groove 144c, and a part of the main spring 121 is fitted into and coupled thereto.

The first inclined cam body 141 and the second inclined cam body 142 are formed on the upper end of the body 143 in a point symmetry (180 ° rotation symmetry) relationship in the circumferential direction. The first and second

inclined cam bodies

141 and 142 have the same shape, respectively, the lower flat surfaces 141c-1 and 142c-1, the first inclined surfaces 141a-1 and 142a-1, and the second inclined surface 141a that are continuously connected to each other. -2, 142a-2, upper flat surfaces 141c-2 and 142c-2, and

stopper surfaces

141b and 142b.

In other words, the first inclined cam body 141 will be described as an example, starting from the lower flat surface 141c-1 flat with respect to the bottom surface, and leading to the first inclined surface 141a-1 having a small inclination angle, and the inclination angle is continuously As a result, the large second inclined surface 141a-2 leads to the upper flat surface 141c-2 flattened with respect to the bottom surface. The stopper surface 141b is a surface which is formed perpendicular to the bottom surface or close to the vertical surface, and is preferably formed at a right angle to the upper flat surface 141c-2 as shown in FIG.

The lower flat surface 142c-1, the first sloped surface 142a-1, and the second sloped surface 142a-2 of the second sloped cam body 142 continuously from the stopper surface 141b of the first sloped cam body 141. ), The upper flat surface 142c-2 and the stopper surface 142b are formed.

On the outer circumferential surface of the body 143 of the lower cam 140, the O-ring coupling groove 145 is formed concave along the circumferential direction and the O-ring 194 is mounted thereto.

5 is an external perspective view of the rotating shaft of the present invention, and FIG. 6 is a front view, a plan view, and a longitudinal cross-sectional view of FIG.

Rotating shaft 160 is to be inserted into the center through-hole of the upper cam 150 to be described later to be coupled to the hinge shaft for inserting and coupling the hinge shaft (not shown) mounted on the home bar door of the refrigerator or the door of the washing machine, etc. It consists of a head portion 161 in which the ball 161a is formed and a shaft portion 162 extending downward of the head portion 161. In the drawings, reference numeral 161b denotes a plurality of coupling protrusions spaced apart in the circumferential direction on the side of the head portion 161.

At least one fluid passage hole 162a is formed in the upper side surface of the shaft portion 162 so as to communicate with the inside of the shaft portion 162. As shown in (c) of FIG. 6, the inside of the rotary shaft 160 includes a hinge shaft coupling hole 161a, a check screw receiving groove 162b communicating with a lower end of the hinge shaft coupling hole, and the check. A check valve accommodation groove 162d is formed in communication with the lower end of the screw accommodation groove 162b. The flow path between the check screw accommodation groove 162b and the check valve accommodation groove 162d is formed with a space defined as a boundary flow path 162c.

The check screw receiving groove 162b is inserted into the check screw 170 as shown in Figure 9 is screwed. Therefore, a thread is formed on the inner wall of the check screw receiving groove 162b.

The check screw 170 has a male screw shape consisting of a screw head 171 having a driver insertion groove 171 a formed on an upper surface thereof and a screw rod portion 172 having a screw thread 172 a formed on an outer circumferential surface thereof.

In FIG. 6C, reference numeral 161c denotes a check screw head sheet for supporting the screw head 171 of the check screw 170.

7 is an external perspective view of the upper cam and the rotary shaft assembly of the present invention, and FIG. 8 is a front view, a plan view, a bottom view, and a longitudinal sectional view of FIG.

The upper cam 150 is coupled to the outer diameter of the rotating shaft 160 having the above-described shape to form a combination. The upper cam 150 has an overall cylindrical shape, and the center portion of the upper cam 150 is opened so that the rotation shaft 160 may be inserted through the upper and lower portions.

On the outer circumferential surface of the upper cam 150, an O-ring coupling groove 155 for mounting the O-ring 193 is concave along the circumferential direction.

The first inclined cam body 151 and the second inclined cam body 152 are formed on the bottom surface of the upper cam 150 at 180 ° intervals (to be point symmetrical) in the circumferential direction. The first and second

inclined cam bodies

151 and 152 have the same shape, and the inclined surfaces 151a and continually extending from the

flat surfaces

151c and 152c and the

flat surfaces

151c and 152c with respect to the bottom surface. 152a and

stopper surfaces

151b and 152b extending from the

flat surfaces

151c and 152c to extend vertically or nearly perpendicular to the bottom surface.

As shown in FIG. 11, the stopper surface 151b of the first inclined cam body 151 of the upper cam 150 has a stopper surface 141b of the first inclined cam body 141 of the lower cam 140 corresponding thereto. Bumping back further limits the reverse. That is, referring to FIG. 11, in the initial state (closed state) before the home bar door of the refrigerator is opened, the

flat surfaces

151c and 152c of the upper cam 150 are the lower flat surfaces 141c-1 and 142 of the lower cam 140. c-1), each of which is positioned on the upper surface, and when the home bar door or the like starts to rotate up and down to open, the

flat surfaces

151c and 152c of the upper cam 150 are first and second inclined to the lower cam 140. The

inclined surfaces

141a and 142a of the

cam bodies

141 and 142 are rotated. At this time, the upper cam 150 ascends the

inclined surfaces

141a and 142a of the lower cam 140 to compress the main spring 121 mounted on the lower cam 140 down.

The

inclined surfaces

141a and 142a of the first and second

inclined cam bodies

141 and 142 of the lower cam 140 include first and second inclined surfaces 141a-1, 141a-2; 142a-1 and 142a-2, respectively. That is, as shown in FIG. 11, the first inclined surfaces 141a-1 and 142a-1 have the same inclinations up to the rotation angle of 0 ° to 65 °, and the second inclination surface has the rotation angle of 65 ° to 95 °. It is preferable to form so that it may have larger inclination than the said 1st inclined surface until now.

This allows the home bar door to be opened quickly at the beginning of the opening of the home bar door and the like, and at the end of the opening operation of the home bar door, the inclined surface of the inclined cam body is urgent to increase the damping force of the home bar door so as to realize the complete opening operation. It is to.

Hereinafter, the operation principle of the present invention having such a configuration will be described with reference to the drawings. 10 is a longitudinal cross-sectional view for explaining the operation principle of the single hinge damping device of the present invention.

When the user presses or opens the home bar door of the refrigerator, a combination of the rotating shaft 160 and the upper cam 150 rotates by a hinge axis (not shown). In this case, the first and second

inclined cam bodies

151 and 152 of the upper cam 150 are rotated along the

inclined surfaces

141a and 142 of the first and second

inclined cam bodies

141 and 142 of the lower cam 140. The upper cam 150 rotating along the

inclined surfaces

141a and 142a of the lower cam 140 consequently pushes the lower cam 140 downward by the cam motion, and in this process, the main spring 121 This is compressed.

Therefore, the damping oil filled in the interior of the body 110 is forcibly pushed upward as shown by the arrow in Fig. 10 (a), and moved to the gap between the upper and lower cams (150, 140) to increase the damping force. Will be provided. In this case, the ball 132 rises due to the hydraulic pressure and elastic force of the check spring 131 to block and block the flow path of the boundary flow path 162c which is an orifice hole.

On the contrary, in the case of closing the home bar door, the lower cam 140 forcibly descended is raised while recovering to the original position by the elastic force of the main spring 121. At this time, the downward pressure of the damping oil pushed up into the gap inside the body 110 is greater than the pressure of the check spring 131, so that the ball 132 is downward and the orifice hole of the boundary passage 162c is opened to damp the oil. It will return to this original position. A plurality of fluid passage holes 162a are formed at the side of the shaft portion 162 of the rotary shaft 160 to smoothly flow the damping oil returned through the boundary passage 162c.

Such a single hinge damping device of the present invention is an example for opening and closing the home bar door of the double-door interior, it can be applied to the lid of the washing machine or the lid of the bidet device as it is, and has other opening doors The same principle can be applied to home appliances.

The present invention relates to a damping device of a door hinge for smoothly opening and closing doors and lids such as refrigerators, washing machines, microwave ovens and bidets for toilet bowls. The opening and closing operation is smooth and prevents shocks, and is excellent in durability, assembly and productivity. It can be widely applied to hinge doors or switchgear for home appliances.

Claims

A body including a damping oil therein and having a cam receiving portion;

A lower cam formed of a first inclined cam body and a second inclined cam body having an inclined surface formed on an upper end of the body and an open hole penetrating up and down at a center thereof;

A rotating shaft including a head portion in which a hinge shaft coupling hole is formed and a shaft portion in which a check screw receiving groove and a check valve receiving groove are formed, and inserted into and coupled to a central opening of the lower cam;

An upper cam coupled to an outer diameter portion of the rotary shaft, the upper cam having a first inclined cam body and a second inclined cam body having an inclined surface formed at a lower end thereof;

A main spring coupled to a lower side of the lower cam and embedded in a cam receiving portion of the body; And

A check valve mounted in a check valve receiving groove of the rotary shaft, the check valve including an upper ball and a check spring that provides an elastic force under the ball;

Single hinge damping device of a home appliance door comprising a.
The method of claim 1,

The inclined surfaces formed on the first inclined body and the second inclined body of the lower cam are continuously formed at an upper end of the first inclined surface and the first inclined surface to be inclined upward with respect to a horizontal plane, and the inclined angle is greater than that of the first inclined surface. Single hinge damping device for a door of a home appliance, characterized in that the second inclined surface formed to be inclined upwardly.
The method according to claim 1 or 2,

The check screw receiving groove which is located in communication with the check valve receiving groove in the rotary shaft in the upper portion is characterized in that the screw screw is formed of a screw head is formed on the outer peripheral surface and the screw head is formed on the upper surface of the driver insertion groove is screwed Hinge damping device for household appliance doors.
The method of claim 3,

O-ring coupling grooves are formed on the outer circumferential surfaces of the upper cam and the lower cam, respectively, and the O-ring is mounted therein, and the shaft part of the rotating shaft is formed with a fluid passage hole communicating with an internal damping oil passage. Single hinge damping device.
The method of claim 4, wherein

Each of the first and second inclined bodies of the lower cam has a lower flat surface that is flat with respect to the bottom surface, a first inclined surface that is inclined with respect to the bottom surface, a second inclined surface that is steeper than the first inclined surface, and is flat with respect to the bottom surface. The stopper surface perpendicular to the upper flat surface and the bottom surface is formed to be continuous in order,

Each of the first and second inclined cam bodies of the upper cam is formed such that a stopper surface perpendicular to the bottom surface, a flat flat surface with respect to the bottom surface, and an inclined surface inclined with respect to the bottom surface are sequentially formed.

Single hinge damping device for a door of a home appliance, characterized in that.