KR101739403B1 - Laundry treatment machine - Google Patents

Abstract

The laundry processing apparatus of the present invention comprises: a main body having a draw-in hole; A lead for opening and closing the pull-in / out hole; And a hinge portion rotatably supporting the lead with respect to the main body, wherein the hinge portion comprises: a hinge housing filled with a fluid having a predetermined viscosity; An elastic member disposed in the hinge housing; A pair of cams having a contact surface having a height difference along the circumferential direction, and a pair of cams, wherein when one of the pair of cams rotates in conjunction with the lead, the contact surface of one cam is in contact with the contact surface One of the pair of cams is moved, and is disposed between the moving cam and the elastic member, deforms the elastic member in correspondence with the displacement of the moving cam, and the inside of the hinge housing And a separating member which is divided into a first space in which the elastic member is disposed and a second space in which the pair of cams are disposed and a fluid passage is formed between the first space and the second space, .

Description

[0001] LAUNDRY TREATMENT MACHINE [0002]

The present invention relates to a laundry processing apparatus.

Generally, a laundry processing apparatus separates contaminants from clothing, bedding, and the like (hereinafter referred to as "laundry") by using physical action such as chemical decomposition of water and detergent and friction between water and laundry A washing machine, a dryer for dehydrating and drying wet laundry, a refresher for spreading laundry by heating heated steam, or a sterilizer for washing, and various devices for treating laundry by applying physical and chemical action to laundry.

The laundry processing apparatus includes a main body for processing laundry, and a lid or a door that is rotatably coupled to the main body and opens and closes the inlet and outlet holes. When the lid is closed, the laundry is strongly collided with the main body, thereby adversely affecting the durability of the product. When the lead is formed of a metal material or when a glass is inserted to form an observation window, the weight of the lead increases and the force of the lead increases. In addition, in the process of closing the lead, There was a conflicting problem.

A conventional laundry processing apparatus is rotatably supported by hinges provided on both sides of the lid. One of the two hinges provides a predetermined repulsive force or resistance during the rotation of the lid, thereby controlling the rotation speed of the lid. However, there is a problem that the reaction force or resistance provided from both hinges is not uniform, resulting in twisting of the lead.

Particularly, conventionally, one of the two hinges includes an elastic member that is deformed as the lid is rotated, and when the lid is closed, when the lid is closed, the restoring force of the elastic member provides a torque in the direction in which the lid is opened, And the other hinge functions as a damper that performs a damping action by a hydraulic pressure or a viscous force acting between the fluid and the fluid including a rotating blade that rotates in conjunction with the lead in the fluid, There has been a problem that the lead is deformed due to the unbalance of force necessarily existing from each hinge due to the difference in structure between the hinges.

A problem to be solved by the present invention is to provide a torque roll for generating a torque roll so that the elastic member is deformed when the lid is closed and the closing speed of the lid is reduced, So that it can be supported by the laundry processing apparatus.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laundry processing apparatus in which a uniform supporting force is exerted from two hinge portions for supporting both sides of a lead.

Another object of the present invention is to provide a laundry processing apparatus in which the size of a hinge portion for supporting a lead is reduced.

The laundry processing apparatus of the present invention comprises: a main body having a draw-in hole; A lead for opening and closing the pull-in / out hole; And a hinge portion rotatably supporting the lead with respect to the main body, wherein the hinge portion comprises: a hinge housing filled with a fluid having a predetermined viscosity; An elastic member disposed in the hinge housing; And a pair of cams formed with contact surfaces having height differences along the circumferential direction. When one of the pair of cams rotates in conjunction with the lead, the contact surface of one of the cams is moved along the contact surface of the other one of the cams, and one of the pair of cams moves. Wherein the hinge portion is disposed between the moving cam and the elastic member to deform the elastic member in correspondence with the displacement of the moving cam so that the inside of the hinge housing is separated from the first space in which the elastic member is disposed, And a second space in which the cams of the first and second chambers are disposed. The fluid passage may be formed between the first space and the second space.

Alternatively, the laundry treatment machine of the present invention may include: a body having a draw-in / out hole; A lead for opening and closing the pull-in / out hole; And a hinge portion rotatably supporting the lead with respect to the main body, wherein the hinge portion comprises: a hinge housing filled with a fluid having a predetermined viscosity; An elastic member disposed in the hinge housing; And a pair of cams formed with a contact surface having a height difference along the circumferential direction. Wherein when one of the pair of cams rotates, the contact surface of one of the cams is moved along the contact surface of the other cam so that one of the pair of cams is moved to deform the elastic member, A space inside the hinge housing is divided into a first space in which the elastic member is disposed by the moving cam and a second space in which the other cam is accommodated, A fluid passage is formed so that fluid can move between the fluid passage.

The laundry processing apparatus of the present invention generates a torque roll such that the elastic member is deformed when the lid is closed and the closing speed of the lid is reduced so that the viscous force accompanying the movement of the fluid also acts together, There is an effect that can support.

In addition, the laundry processing apparatus of the present invention has an effect that a uniform supporting force acts from two hinge portions for supporting both sides of the lid.

In addition, the laundry processing apparatus of the present invention can reduce the size of the elastic member with respect to the same supporting force by providing the hinge unit to which the viscous force is applied in addition to the elastic force, as compared with the conventional hinge structure, Therefore, the hinge portion can be miniaturized.

1 is a perspective view of a washing machine according to an embodiment of the present invention.
2 is a side sectional view showing the inside of the washing machine of FIG.
Fig. 3 shows a coupling relationship between the lead and the hinge portion in Fig.
FIG. 4A is a perspective view showing the hinge, FIG. 4B is an exploded perspective view of the hinge, FIG. 4C is a fixed cam, and FIG.
Fig. 5A shows the internal configuration of the hinge portion with the lid opened, and Fig. 5B is a sectional view of Fig. 5A.
Fig. 6A shows the internal structure of the hinge portion in the process of turning the lid closed, and Fig. 6B is a sectional view of Fig. 6A.
7 is a side view for explaining the rotational motion of the lid.
8 is a cross-sectional view of a hinge according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the washing machine according to the present invention will be described in the context of a washing machine. However, the present invention is not limited thereto, and the present invention may be applied to a laundry processing machine such as a dryer, a drying machine, and a refresher.

1 is a perspective view of a washing machine according to an embodiment of the present invention. 2 is a side sectional view showing the inside of the washing machine of FIG. Fig. 3 shows a coupling relationship between the lead and the hinge portion in Fig.

1 and 2, the washing machine W includes a main body 10 and a lid 20 rotatably mounted on the main body 10. [ The main body 10 includes a cabinet 11 having an opened upper portion and a top cover 12 provided at an upper portion of the cabinet 11 and having a draw-in and -out hole h for allowing laundry to enter and exit the cabinet 11 from above. . ≪ / RTI > In this case, the lid 20 is supported by the top cover 12 and closes the draw-in and-out hole h.

The control panel 16 may include an input unit to which various control commands for operating the washing machine W are input and a display unit to display the washing machine operation state.

In the cabinet 11, the outer tub 30 is suspended through the support member 15, and the outer tub 30 is filled with the washing water. The inner tank 35 is rotatably disposed inside the outer tank 30. [ A damper 25 is provided at the lower end of the support member 15 to buffer the vibration of the outer tank 30 caused by the vibration generated when the inner tank 35 rotates. A pulsator 40 is provided at the bottom of the inner tank 35 And is rotatably provided. The contamination of the laundry can be effectively removed by the water flow action formed by the friction action between the pulsator 40 and the laundry contained in the inner tank 35 and the rotation of the pulsator 40.

A plurality of water holes (36) are formed in the inner tank (35) so that the washing water can flow between the inner tank (35) and the outer tank (30). On the lower side of the outer tank 30, there is provided a motor 50 serving as driving means for rotating the inner tank 35 and the pulsator 40. The rotation of the inner tub 35 and / or the pulsator 40 is performed via the rotary shaft 55 rotated by the motor 50.

A clutch (not shown) for engaging the rotary shaft 55 and the inner tank 35 and / or the pulsator 40 to selectively rotate the inner tank 35 and the pulsator 40 selectively is provided. The inner tank 35 and the pulsator 40 can be rotated simultaneously or only the pulsator 40 can be rotated according to the operation of the clutch.

The top cover 12 is provided with a detergent box 60 for allowing detergent to be received therein, a water supply hose 70 connected to an external water source such as a domestic faucet or the like for supplying washing water to the detergent box 60, And a water supply valve (75) for interrupting the washing water flowing through the hose (70). When the water supply valve 75 is opened and the washing water is supplied from the external water source, the supplied washing water flows into the detergent box 60 and mixed with the detergent contained in the detergent box 60 to be supplied into the inner tank 35.

A drainage hose 80 for draining the washing water in the outer tub 30 to the outside is provided at the lower end of the outer tub 30, a drainage control valve 85 for interrupting the washing water flowing out through the drainage hose 80, A drain pump 86 for pumping the water outward is provided.

The lid 20 is rotatably coupled to the top cover 12 so that the user can open and close the catch and release hole h. It is preferable that the front end of the lead 20 protrudes forward from the top cover 12 in a state in which the lid 20 is closed so that the user can easily open the lid 20. [

Referring to Fig. 3, the lid 20 may include a lead frame 21 and a window 22 supported by the lead frame 21. As shown in Fig. The lead frame 21 may be made of a synthetic resin material, and the window 22 may be made of a transparent member such as tempered glass. Since the window 22 having a relatively higher rigidity than the lead frame 21 is provided in the central portion of the lead frame 21, the structural stability is improved and therefore the lead frame 21 can be prevented from being twisted.

FIG. 4A is a perspective view showing the hinge, FIG. 4B is an exploded perspective view of the hinge, FIG. 4C is a fixed cam, and FIG. Fig. 5A shows the internal configuration of the hinge portion with the lid opened, and Fig. 5B is a sectional view of Fig. 5A. Fig. 6A shows the internal structure of the hinge portion in the process of turning the lid closed, and Fig. 6B is a sectional view of Fig. 6A.

Referring to these drawings, the hinge unit 100 supports the lid 20 to be rotatable with respect to the main body 10, and includes a hinge housing 110 filled with a fluid having a predetermined viscosity, 110 and a pair of cams 120, 130, respectively.

At least one of the pair of cams 120, 130 includes a contact surface formed to have a height difference along the circumferential direction. One of the pair of cams is rotated to be engaged with the lead 20, and the other cam is provided to maintain contact with the rotating cam. Thus, either cam is moved along its own center of rotation (C, or the axis of rotation of the lead 20) according to the shape of the contact surface formed on at least one of the cams.

The term " cam device " refers to a device for converting rotational motion into reciprocating motion. In general, such a cam device is configured such that, as a rotation cam whose distance from an arbitrary point on the circumference to the rotation axis is not constant, a cam follower contacted around the rotation cam is orthogonal to the rotation axis of the rotation cam However, depending on the shape or structure of the cam and the cam follower, it is also possible to switch to the reciprocating motion along the rotation axis of the rotation cam.

In the present invention, the pair of cams are provided so as to maintain contact between the rotation cam and the first cam rotated in conjunction with the lid 20, so that the relative distance between the first cam and the first cam And a second cam that is variable. That is, when any one cam (first cam) of the pair of cams rotates in conjunction with the lead, the contact surface of one cam (first cam) contacts the contact surface of the other cam (second cam) And one of the pair of cams is moved. Here, 'any one of the pair of cams' may be either the first cam or the second cam according to the embodiment.

More specifically, according to the above-described definition of the cam, the first cam is defined as a rotation cam rotated in conjunction with the lead 20, and the second cam is defined as a cam follower reciprocating by the first cam . However, it should be noted that, in defining the hinge portion of the present invention, the second cam is not necessarily limited to reciprocating motion when the first cam is rotated. According to the embodiment, the first cam (see 130 in FIG. 4B) can be rotated in conjunction with the lead 20 and reciprocating motion.

In addition, the shape of the contact surface of the first cam and the contact surface of the second cam, which are in contact with each other, must not necessarily be the same. That is, at least one cam of the first cam and the second cam may be provided with a contact surface whose height varies along the circumferential direction. Here, the height of the contact surface is defined as a distance from a predetermined plane perpendicular to the rotation axis of the cam to an arbitrary point on the contact surface.

The hinge housing 110 may include a housing body 111 whose one end is opened and a housing cover 115 which closes an opened end of the housing body 111. [ The support plate 112 may be formed on the housing main body 111 and a plurality of fastening holes 113 for inserting the fastening member 144 for fastening the hinge 100 to the top cover 12 May be formed. The housing cover 115 is formed with a through hole through which the shaft 160 passes, and can be coupled with the housing main body 111 by fastening members 144.

Referring to FIG. 3, a pair of hinge parts 100 may be provided. Each rotation center or shaft 160 of the pair of hinge parts 100 is aligned coaxially, and in particular, may be disposed symmetrically to the rear end of the lid 20. [ A receiving portion 21a in which the hinge portions 100 are accommodated can be formed at the rear end of the lead frame 21 and a member coupled to the shaft 160 around the end portion of the shaft 160 A predetermined space 21b can be formed in which a space (e.g. Although not shown in the drawing, the window 22 is not separated, and the inside of the lead frame 21, in particular, the frame member coupled to the underside of the lead frame 21 so that the hinge 100 is not exposed .

The lid 20 is supported by the pair of hinge parts 100 and each hinge part 100 is configured identically so that the support 20 supported by each hinge part 100 in accordance with the rotation operation of the lid 20 Or the damping force is the same, it is possible to prevent deformation such as warping even if the lid 20 is repeatedly opened and closed.

On the other hand, the separating member 150 is disposed between the cam and the elastic member 141, which is moved along the axial direction when the lid 20 is rotated, of the pair of cams, and the resilient member 141 And the inside of the hinge housing 110 is divided into a first space S1 in which the elastic member 141 is disposed and a second space S2 in which the pair of cams 120 and 130 are disposed 5b, 6b). The fluid passage 151 is formed in the separating member 150 so that fluid can move between the first space S1 and the second space S2. Accordingly, when the first space S1 or the second space S2 is reduced or expanded by varying the length of the elastic member 141 according to the movement of the cam, the first space S1 and the second space S2 (See arrows in Fig. 6B). At this time, a predetermined damping force is provided when the lid 20 is operated by the viscous force according to the movement of the fluid.

The hinge unit 100 includes a hinge housing 110 filled with a fluid having a predetermined viscosity, an elastic member 141 disposed in the hinge housing 110, contact surfaces 121, 122], [131, 132]). The shaft 160 connects the hinge 100 to the top cover 12 and is a fixed shaft whose rotation is restricted. A cutting surface 161 may be formed along the outer circumferential surface of the round bar, 12 may be provided with a fixing member such as a bracket provided with an insertion hole corresponding to the cross-sectional shape of the shaft 160.

The pair of cams 120 and 130 are fixedly coupled to the shaft 160 and rotate together with the fixed cam 120 and the lead 20. The fixed cam 120 is rotated in accordance with the rotation angle, And a moving cam 130 whose distance from the moving cam 130 is variable. The contact surfaces 121 and 122 of the fixed cam 120 and the contact surfaces 131 and 132 of the moving cam 130 are kept in contact with each other so that the contact surface of the movable cam 130 131 and 132 are moved along the contact surfaces 121 and 122 of the fixed cam 120 and the position of the movement cam 130 is varied according to the shape of the contact surface,

The contact surface (for example, 131) of each cam has a gradient in which the height varies along the circumferential direction with reference to the center axis C (see FIG. 4D). At this time, When the hole (h) is closed, the movement cam 130 is set so as to be movable in the direction of compressing the elastic member 141. At this time, the separating member 150 moves corresponding to the displacement of the moving cam 130 and compresses the elastic member 141. In this structure, the restoring force acting from the compressed elastic member 141 is a force that acts on the contact surface between the moving cam 130 and the fixed cam 120, So that the closing speed of the lead 20 is reduced. That is, the torque at this time acts so that the user can open the lid 20 with a smaller force.

The fluid passage 151 may have a different cross sectional area between the first hole 152 opened toward the first space S1 and the second hole 153 opened toward the second space S2. This structure makes it possible to make a difference in the viscous force due to the movement of the fluid when the lid 20 is closed and when it is opened. Particularly, the area of the first hole 152 may be smaller than the area of the second hole 153 so that a greater damping force can be provided when the lid 20 is closed than when the lid 20 is opened. In this case, the fluid path 151 may be formed so that the inner diameter gradually increases from the first hole 152 to the second hole 153.

5B and 6B are compared with each other. When the separating member 150 is moved by the closing operation of the lid 20 and the elastic member 141 is compressed, the first space S1 is reduced, Lt; / RTI > Accordingly, in the hinge housing 110, the fluid moves from the first space S1 to the second space S2 and provides a predetermined damping force.

The hinge portion 100 includes an O-ring 142 that hermetically seals between the outer circumferential surface of the separating member 150 and the inner circumferential surface of the hinge housing 110 and an O-ring 145 that hermetically seals between the housing main body 111 and the housing cover 115. [ As shown in FIG.

Referring to Fig. 4C, the fixed cam 120 includes a first cam leg A and a second cam leg B. The first cam leg A and the second cam leg B are engaged with the first cam leg A 'and the second cam leg B' of the moving cam 130, respectively, The legs A and the second cam legs B each have an annular partition wall structure whose height along the circumferential direction is variable and the contact surfaces 121 and 122 are formed at the ends of the respective cam legs.

At this time, the contact surface formed on at least one of the first and second cam legs A and B may include a regular slope and a reverse slope, which have different slopes and extend on both sides with respect to the highest point.

More specifically, the contact surface 121 formed on the first cam leg A is formed such that the rotation angle of the lead 20 is d ₁ and d ₃ (The state in which the lead 20 is closed) and d ₁ (the state in which the lead 20 is closed) and the rotation angle of the lead 20 is 0 The abutment surface 122 of the second cam leg B may include the regular inclined surface 122a and the inverted inclined surface 122b.

The fixed cam 120 may further include an insertion protrusion 123 protruding toward the moving cam 130. The insertion protrusion 123 may be inserted into the insertion hole 134 (see FIG. 4D) formed in the moving cam 130, So as to guide the movement of the movement cam 130. It is preferable that the insertion protrusion 123 is always inserted in the insertion hole 134 in the displacement section in which the position of the movement cam 130 changes according to the operation of the lead 20. [

4D, the moving cam 130 may include a first cam leg A 'and a second cam leg B', like the fixed cam 120, and the first cam leg A ' And the second cam legs B 'are formed with contact surfaces which contact the contact surfaces of the fixed cam 120, respectively.

The contact surface 131 formed on the first cam leg A 'of the moving cam 130 corresponds to the contact surface 121 formed on the first cam leg A of the fixed cam 120, The contact surface 132 formed on the second cam leg B 'corresponds to the contact surface 122 formed on the second cam leg B of the fixed cam 120, The contact surface of the fixed cam 120 is moved along the contact surface of the corresponding fixed cam 120.

The contact surface 131 of the first cam leg A 'may include the regular inclined surface 131a and the reverse inclined surface 131b and the second cam leg B' The contact surface 132 may also include a positive slope 132a and a reverse slope 132b.

The positive slopes 131a and 132a of the moving cam 130 are swung along the regular slopes 121a and 122a of the fixed cam 120 at the rotation angle B-D of the lead 20, respectively.

The reverse slopes 131b and 132b of the moving cam 130 are slid along the reverse slopes 121b and 122b of the fixed cam 120 in the rotation angle range A-B of the lead 20, respectively.

7 is a side view for explaining the rotational motion of the lid. Referring to FIG. 7, if the rotation angle at which the lead 20 increases from the closed position A to the maximum open position D is defined as the opening angle, the opening angle d ₂ The lead 20 can be automatically rotated to the point D without any additional external force from the user. If the lead 20 is opened only by an external force exerted by the user, the lead 20 will automatically open from the point when the opening angle becomes 90 degrees or more. However, in this embodiment, the lead 20 is opened by the hinge 100 Since the torque acts in the opening direction, the lead 20 can be automatically opened even in the section where the opening angle is less than 90 degrees (d ₂ <90). d ₂ can be set to approximately 80 degrees.

The maximum opening angle d ₃ of the lead 20 can be set to approximately 110 degrees. A stopper (not shown) may be further provided to limit the rotation of the lid 20 beyond the maximum opening angle according to the embodiment. Alternatively, the rotation of the lid 20 due to the contact with the control panel 16 Lt; / RTI &gt;

Opening angle d ₁ The rotation of the lead 20 is decelerated or stopped in a period between d ₁ and d ₂ . The torque acting from the hinge 100 is opposite to the torque due to the weight of the lead 20 and the rotational speed of the lid 20 is decelerated in the section in consideration of the viscosity due to the movement of the fluid It is self-evident. In addition, since the torque acting from the hinge 100 and the viscous force due to the flow of the fluid in the hinge housing 110 act as factors canceling the torque due to the self weight of the lid 20 , By appropriate combination of these factors, the opening angle d ₁ And d ₂ The lead 20 may be kept stationary. As the capacity of the washing machine is increased, the size of the lead 20 is also increased, so that it may not be easy for the user to hold the lead 20 at the front end and lift it up to the point C. Therefore, Can be stopped, thereby improving the ease of use when the cloth is put in or taken out.

On the other hand, lead 20 reaches the opening angle is in a small interval than d ₁ in the closed, and the lead 20 is automatically closed by rotation. In this section, the torque due to the weight of the lid 20 is stronger than that between the teeth, so that the shape of the contact surface, the elastic modulus of the elastic member 141, The lid 20 can be automatically closed.

In addition, in at least one of the fixed cam 120 and the moving cam 130, a torque acts on the cam leg (hereinafter, the direction in which the lid 20 opens in the cam leg A 'of the moving cam) The first contact surface 131a and the second contact surface 131b having a gradient in the opposite direction to the first contact surface 1321a are formed so that the movement cam 130 and the stationary cam 120 can be brought into contact with each other through the first contact surface 131a and between the points A and B through the second contact surface 131b. in also the contact surface of the moving cam (130) (131a, 131b) and the corresponding contact face (121a, 121b) are formed by, a contact surface formed in each kaemdeul be in contact with each other and opening angle of the a point d ₁ is about 25 Can be set up.

8 is a cross-sectional view of a hinge according to another embodiment of the present invention. The hinge portion 200 described below has the hinge portion 100 according to the embodiment described above except that the separating member 150 is not provided and the structure of the moving cam 230 and the fixed cam 220 is different. same.

In this embodiment, the hinge part 200 is not provided with the separating member 150 (see Figs. 5A and 5B), and instead, the fluid moving path 235 is formed in the moving cam 230, An insertion protrusion 225 to be inserted into the passage 235 is formed. The gap g for fluid movement may exist between the fluid path 235 and the insertion protrusion 225.

The area of the second hole 235b opened toward the second space S2 may be larger than the area of the first hole 235a opened toward the first space S1 have.

When the movable cam 230 is moved toward the elastic member 141 as the lid 20 is closed, the elastic member 141 is deformed. At this time, the fluid flows from the inner circumferential surface of the fluid path 235, (See arrows in Fig. 8) from the first space S1 to the second space S2 through the gap g between the outer circumferential surfaces of the first space S2.

Claims (18)

A body having a take-in and-go hole formed therein;
A lead for opening and closing the pull-in / out hole; And
And a hinge portion rotatably supporting the lead with respect to the main body,
The hinge unit includes:
A hinge housing filled with a fluid having a predetermined viscosity;
An elastic member disposed in the hinge housing; And
And a pair of cams formed with a contact surface having a height difference along the circumferential direction,
When one of the pair of cams rotates in conjunction with the lead, the contact surface of one of the cams is moved along the contact surface of the other one of the cams so that one of the pair of cams moves,
The hinge unit includes:
A first space in which the elastic member is disposed and a second space in which the elastic member is disposed and a second space in which the pair of cams are arranged in the hinge housing, Further comprising a separating member which is divided into a first space and a second space in which the fluid path is formed so that the fluid can move between the first space and the second space,
Wherein the fluid passage is formed to penetrate the separating member. The method according to claim 1,
The hinge unit includes:
And a shaft coupled to the body,
The pair of cams
A fixed cam whose rotation is restricted by the shaft; And
And a moving cam that is rotated in association with the lead and whose distance from the fixed cam is varied according to a rotation angle of the moving cam. 3. The method of claim 2,
The moving cam
Wherein the elastic member is moved in a direction in which the length of the elastic member is reduced when the lid is rotated to close. 3. The method of claim 2,
The fluid passage may include:
Wherein a first hole opened toward the first space and a second hole opened toward the second space have different sectional areas. 5. The method of claim 4,
Wherein the area of the first hole is smaller than the area of the second hole. 6. The method of claim 5,
The fluid passage may include:
Wherein the cross-sectional area of the flow path gradually increases from the first hole to the second hole. The method according to claim 1,
The hinge unit includes:
Further comprising an O-ring which is hermetically sealed between an outer circumferential surface of the separating member and an inner circumferential surface of the housing. The method according to claim 1,
Wherein the pair of hinge portions are provided so that the rotation centers of the respective hinge portions are coaxially aligned. 9. The method of claim 8,
The lead includes:
And a window that can be observed from the outside of the bag inserted through the pull-in / take-out hole. A body having a take-in and-go hole formed therein;
A lead for opening and closing the pull-in / out hole; And
And a hinge portion rotatably supporting the lead with respect to the main body,
The hinge unit includes:
A hinge housing filled with a fluid having a predetermined viscosity;
An elastic member disposed in the hinge housing; And
And a pair of cams formed with a contact surface having a height difference along the circumferential direction,
When one of the pair of cams rotates, the contact surface of one cam is moved along the contact surface of the other cam so that one of the pair of cams is moved to deform the elastic member,
Wherein a space inside the hinge housing is divided into a first space in which the elastic member is disposed by the moving cam and a second space in which the other cam is accommodated,
In the moving cam,
A fluid path is formed between the first space and the second space so that the fluid can move,
The other one of the pair of cams being formed with an insertion protrusion which is inserted into the fluid passage,
There is a predetermined gap between the fluid path and the insertion protrusion for fluid movement,
The fluid passage may include:
Wherein an area of the first hole opened toward the first space is smaller than a second hole opened toward the second space. delete delete delete 11. The method of claim 10,
The fluid passage may include:
Wherein the cross-sectional area of the flow path gradually increases from the first hole to the second hole. 11. The method according to claim 1 or 10,
At least one pair of the hinge portions is provided,
The pair of hinge parts
A left hinge portion connecting the left side of the lead to the main body; And
And a right hinge portion connecting the right side of the lead to the main body,
Wherein the left hinge portion and the right hinge portion comprise:
Wherein the laundry is disposed symmetrically with respect to the lead. 16. The method of claim 15,
Wherein the left hinge portion and the right hinge portion are configured identically. 16. The method of claim 15,
Wherein the left hinge portion and the right hinge portion provide the same damping force. 11. The method according to claim 1 or 10,
The pair of cams
A fixed cam independent of rotation of the lead; And
And a moving cam rotated in association with the lead,
Wherein the moving cam is moved in a linear direction by an interaction between a contact surface of the fixed cam and a contact surface of the moving cam.

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