KR20130025227A - Hinge and manufacturing method of it - Google Patents

Hinge and manufacturing method of it Download PDF

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Publication number
KR20130025227A
KR20130025227A KR1020110088624A KR20110088624A KR20130025227A KR 20130025227 A KR20130025227 A KR 20130025227A KR 1020110088624 A KR1020110088624 A KR 1020110088624A KR 20110088624 A KR20110088624 A KR 20110088624A KR 20130025227 A KR20130025227 A KR 20130025227A
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KR
South Korea
Prior art keywords
door
assembly
hinge
hinge shaft
frame
Prior art date
Application number
KR1020110088624A
Other languages
Korean (ko)
Inventor
임국건
최성원
Original Assignee
임국건
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 임국건 filed Critical 임국건
Priority to KR1020110088624A priority Critical patent/KR20130025227A/en
Publication of KR20130025227A publication Critical patent/KR20130025227A/en

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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D11/00—Additional features or accessories of hinges
    • E05D11/0054—Covers, e.g. for protection
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D3/00—Hinges with pins
    • E05D3/02—Hinges with pins with one pin
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D5/00—Construction of single parts, e.g. the parts for attachment
    • E05D5/10—Pins, sockets or sleeves; Removable pins
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D7/00—Hinges or pivots of special construction
    • E05D7/10—Hinges or pivots of special construction to allow easy separation or connection of the parts at the hinge axis
    • E05D7/1044—Hinges or pivots of special construction to allow easy separation or connection of the parts at the hinge axis in an axial direction
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D5/00—Construction of single parts, e.g. the parts for attachment
    • E05D5/10—Pins, sockets or sleeves; Removable pins
    • E05D2005/102—Pins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hinges (AREA)

Abstract

PURPOSE: A hinge and a manufacturing method thereof are provided to improve the assembly and safety and simplify a production process by reducing the number of components. CONSTITUTION: A hinge includes a door assembly(10), a frame assembly(40), a hinge shaft(70), a cover(90) and a separation prevention groove(80). The door assembly includes a door joint(20) bonded to a door and a first penetration part(30) formed to rotate with the door joint. The frame assembly placed at the lower side of the door joint includes a second penetration part(60) penetrated by the hinge shaft and a frame joint(50) bonded to a frame. The hinge shaft combines by penetrating a second penetration part and becomes the rotational center of the door assembly and the frame assembly. The cover covers a penetration part opposite to the combined direction of the hinge shaft. A separation prevention groove, which is formed on the first penetration part and the hinge shaft, and the second penetration part and the cover, prevents the separation of the hinge shaft.

Description

Hinge and manufacturing method

The present invention relates to a hinge and a method for manufacturing the same, and more particularly, to a hinge and a manufacturing method in which the separation prevention groove is processed in a portion through which the hinge shaft and the hinge shaft are coupled.

Hinge is a device that is used for a variety of doors to be coupled to the support to secure the door rotatable. This hinge is partly coupled to the door, while the other part is configured to be rotatable with the central axis of rotation of each coupling portion coupled to the support.

The hinge is used in various ways such as a door of a building, a door of a home appliance, a door of a vehicle, and many forms have been developed and developed according to each use purpose.

The hinge may include a function suitable for each use, or may include a component that requires a plurality of precise machining.

The hinge is simple, and the main component is manufactured to realize durability and safety while minimizing the manufacturing cost with a simple configuration.

At this time, the hinge is a configuration due to the reduction of the material or omission of the configuration in order to reduce the manufacturing cost, there is a problem that impairs the safety and ease of use.

An object of the present invention is to provide a hinge and a method of manufacturing the same, which is improved in assembly and safety.

Another object of the present invention is to provide a hinge and a method of manufacturing the same, which reduces the production process due to the reduction of the number of parts.

The hinge according to the present invention comprises: a door assembly having a door coupling part fixedly coupled to the door and a through part integrally formed with the door coupling part; A frame assembly having a frame coupling part fixedly coupled to the frame supporting the door, and a through part integrally formed with the frame coupling part; A hinge shaft which penetrates through the through part and serves as a center of rotation of the door assembly and the frame assembly; A cover for shielding the through part in a direction opposite to the hinge shaft fastening direction; And a release preventing groove for preventing the hinge shaft from being separated from the assembly. .

In addition, the manufacturing method of the hinge according to the present invention, the door assembly having a door coupling portion fixed to the door and the through portion formed integrally with the door coupling portion, and a frame assembly fixedly coupled to the frame supporting the door Coupling a hinge shaft which becomes a center of a coalescer of the assembly; And forming an escape prevention groove in the hinge shaft and the combination to prevent separation of the hinge shaft. .

In the hinge according to the present invention and a method of manufacturing the same, a separation preventing groove is formed to prevent the hinge shaft from being separated from the assembly.

The separation prevention grooves can be expected to reduce the demand of other accessories for preventing the departure of the hinge shaft. As a result, the effect of improving the assembly and productivity can be expected, and the effect of reducing the production cost can be expected.

In addition, as the demand for accessories is reduced, it is possible to expect the effect of reducing the assembly process.

On the other hand, the separation of the hinge shaft is prevented it is possible to expect the effect of improving the safety of the hinge.

1 is a perspective view showing the appearance of the hinge according to an embodiment of the present invention.
2 is an exploded perspective view showing the configuration of a hinge according to an embodiment of the present invention.
3 is a cross-sectional view showing the configuration of a hinge according to an embodiment of the present invention.
4 is a block diagram showing a hinge manufacturing method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a hinge according to the present invention and a manufacturing method will be described with reference to the embodiment.

It is to be understood, however, that the scope of the present invention is not limited by the embodiments described below, and those skilled in the art, upon reading the present disclosure, It will be easily suggested, but this will also be included in the technical idea of the present invention.

In addition, terms used in the present specification or claims are concepts selected for convenience of description and should be properly interpreted as meanings corresponding to the technical idea of the present invention in grasping the technical contents of the present invention.

1 is a perspective view showing the appearance of the hinge according to an embodiment of the present invention, Figure 2 is an exploded perspective view showing the configuration of the hinge according to an embodiment of the present invention, Figure 3 is a configuration of the hinge according to an embodiment of the present invention Is a cross-sectional view.

Referring to the accompanying drawings, the hinge is a door assembly 10 located on the relatively upper side, a frame assembly 40 located on the lower side of the door assembly 10, the door assembly 10 and the It has a configuration including a hinge shaft 70, which is a rotation center of the frame assembly 40, and a separation prevention groove 80 for preventing the hinge shaft 70 from being separated.

The door assembly 10 is a part that is fixedly coupled to a door (not shown) to selectively open and close a predetermined space, the door coupling portion 20 is fixedly coupled to the door by a fastening member, and the hinge The shaft 70 has a configuration including a first through portion 30 which is fastened while being penetrated and formed so that the door coupling portion 20 is rotatable around the hinge shaft 70.

The door coupling part 20 is formed of a material having a predetermined strength and is formed in a plate shape having a predetermined thickness as a whole. As shown in the drawing, the door coupling part 20 is formed in a form in which a left portion is bent forward with respect to a horizontal center portion, and a portion bent forward is fixedly coupled to the door.

Of course, it is also possible to be configured so that the portion that is bent forward of the door coupling portion 20 is not bent, which can be processed to suit the environment in which the hinge is used.

In the embodiment of the present invention, a configuration of the door assembly 10 having a form in which a part of the door coupling portion 20 is bent forward will be described as an example.

The door coupling part 20 has a plurality of door fastening holes 21 through which a fastening member (not shown) for fixed coupling with the door is formed. As the fastening member penetrates the door fastening hole 21 and is fastened to the door, the door coupling part 20 is fixedly coupled to the door.

The door fastening hole 21 is formed at the bent portion of the door coupling part 20. That is, the door fastening hole 21 is formed at the bent portion of the door coupling part 20, and the door coupling part 20 is fixedly coupled to the door while the fastening member penetrates through the door fastening hole 21. Done.

The first through portion 30 is formed at the right end of the door coupling portion 20 by a cylindrical bending process. The first through portion 30 is formed in a hollow cylindrical shape of the inner space by the cylindrical bending process from the right end of the door coupling portion 20 to the left.

That is, the first through portion 30 is formed in a cylindrical shape having a predetermined inner diameter while the upper and lower surfaces are opened. The first through part 30 may be configured to be integrally formed with the door coupling part 20, or may be separately configured and fixed to the door coupling part 20.

In detail, the first end portion 30 is formed by bending the right end portion of the door coupling portion 20, and the left portion is bent forward by the bending process. It is also possible to form the form, it will be also possible to be formed by a configuration that is coupled to each other after processing the door coupling portion 20 and the first through portion 30, respectively.

However, in consideration of the strength and safety of the door assembly 10, the door coupling portion 20 and the first through portion 30 will be preferably formed integrally.

On the other hand, the frame assembly 40 is located on the lower side of the door assembly 10 in the drawings. The frame assembly 40 is formed to be compatible with the door assembly 10.

That is, the frame assembly 40 is formed of the same material and the same size as the door assembly 10, and in the opposite direction to the door assembly 10 for fixed coupling with the frame supporting the door, not the door. Will be located.

The frame assembly 40 is made of a material having a predetermined strength, and is made in the form of a square plate having a predetermined thickness as a whole. The second end portion 60 through which the hinge shaft 70 penetrates is formed at the left end portion of the frame assembly 40, and the door is supported at the right portion portion of the second through portion 60. Frame coupling portion 50 is fixed to the formed.

The frame coupling portion 50 is formed in the shape of a rectangular plate having a predetermined thickness, and is formed in a shape in which the right portion is bent forward based on the center portion in the horizontal direction.

A plurality of frame fastening holes 51 through which a fastening member for fixing and coupling the frame coupling part 50 to the frame are formed at the bent portion of the frame coupling part 50.

As the fastening member penetrates the frame fastening hole 51 and is fastened to the frame, the frame coupling part 50 is fixedly coupled to the frame.

The second through portion 60 is formed to have the same outer diameter and inner diameter as the first through portion 30, and is positioned in the vertical direction so that the inner diameter of the second through portion 60 is located on the same virtual line.

When the first through portion 30 and the second through portion 60 is located in the up and down direction and the center thereof is located on the same line in the virtual up and down direction, the hinge shaft 70 from above to below as shown in the drawing ) Is fastened through the first through part 30 and the second through part 60.

The hinge shaft 70 is formed in a cylindrical shape long in the vertical direction, the outer diameter of the upper end portion is formed to have an outer diameter larger than the outer diameter of the cylinder is formed in a bolt shape as a whole.

When viewed from the front, the upper end portion of the hinge shaft 70 having a relatively large outer diameter while being formed in a substantially “T” shape is positioned above the first through portion 30, and the other portion has the first through portion. It is fastened while penetrating the portion 30 and penetrating to the second through portion 60.

In this case, the hinge shaft 70 may be configured such that its lower end is fully penetrated through the second through part 60, and its lower end is fastened without completely penetrating the second through part 60. It is also possible.

In the embodiment of the present invention, a lower end portion of the hinge shaft 70 will be described as an example in which the lower portion of the hinge shaft 70 penetrates to the center portion in the vertical direction without being completely penetrated.

The outer diameter of the upper end portion of the hinge shaft 70 is formed to have a larger diameter than the inner diameter of the first through portion 30 when the hinge shaft 70 is fastened while passing through the first through portion 30. The upper end of the hinge shaft 70 is formed so as not to be separated downward.

In addition, an anti-friction member for preventing damage due to friction caused by rotation of the door assembly 10 and the frame assembly 40 between the first through portion 30 and the second through portion 60. 72 is located.

The friction preventing member 72 is formed in the shape of a circular ring having a predetermined thickness. The inner diameter of the friction preventing member 72 is formed to have a larger diameter than the outer diameter of the circular column of the hinge shaft 70, the outer diameter of the first through portion 30 and the second through portion 60 It is formed to have a diameter corresponding to the outer diameter.

Of course, the outer diameter of the friction preventing member 72 may be formed to be larger or smaller than the outer diameter of the first through portion 30 and the second through portion 60, the hinge is formed in any configuration Preferably, the inner diameter of the shaft 70 penetrates the inner diameter so that the shaft 70 has a larger inner diameter than the outer diameter of the hinge shaft 70.

In addition, the outer diameter of the friction preventing member 72 may be configured to have the same outer diameter as the outer diameter of the first through portion 30 and the second through portion (60). This is to improve aesthetics and stability by the same outer diameter.

A cover 90 for shielding the lower surface is fastened to the opened lower surface of the second through part 60. The cover 90 is formed in a cylindrical shape having a predetermined diameter and shields the open lower surface of the second through part 60.

The outer diameter of the lower surface of the cover 90 is formed to have a larger outer diameter than the inner diameter of the second through portion 60, the outer diameter of the portion formed in a cylindrical shape is smaller than the inner diameter of the second through portion 60 It is formed to have a diameter.

The cover 90 is coupled to the portion formed in a cylindrical shape while being fitted into the open lower surface of the second through portion 60 from below, a diameter larger than the inner diameter of the open lower surface of the second through portion 60. The bottom surface having a contact with the bottom surface of the second through part 60 is coupled while being fitted until no longer inserted into the cover 90.

When the cover 90 shields the open lower surface of the second through portion 60, the flow of foreign matter introduced through the open lower surface of the second through portion 60 is blocked, so that the second through portion is blocked. Including the 60, it has the advantage of keeping the internal space of the first through portion 30 clean, it may have the advantage of improving the aesthetic appearance.

On the other hand, the departure prevention groove 80 is formed in the first through portion 30, the hinge shaft 70, the second through portion 60 and the cover 90. The release preventing groove 80 serves to prevent the hinge shaft 70 from being separated from the first through portion 30, and the cover 90 from the second through portion 60. It is to prevent the departure.

The release preventing groove 80 is formed in the first through portion 30 and the hinge shaft 70 at the same time in a shape having a predetermined length and depth in the horizontal direction. The departure preventing groove 80 is processed by slotting or pressing.

The slotting process is a kind of processing method for forming a groove having a predetermined length and depth in a material, and the press working is a kind of processing method for processing an intended shape by pressing.

The release preventing groove 80 may be formed in the hinge shaft 70 by compressing the first through portion 30 while the hinge shaft 70 is coupled while passing through the first through portion 30. Until the crimping process.

When the hinge shaft 70 is coupled to penetrate at least the first through portion 30 and then presses a predetermined position of the upper half of the first through portion 30, the first through portion is pressed by the pressure. 30 is recessed from the outside toward the inside.

At this time, as the outer surface of the first through portion 30 is recessed inwardly, the inner surface of the first through portion 30 is protruded while having a certain length inward. As the inner surface of the first through portion 30 protrudes, the cylindrical outer surface of the hinge shaft 70 is recessed to the inside by the pressing force.

As such, when a compressive force is applied by a predetermined area on the outer surface of the first through portion 30, the outer surface of the first through portion 30 to which the compressive force is applied is recessed inward toward the circle center.

When the outer surface of the first through portion 30 is recessed inward, the inner surface of the first through portion 30 protrudes inwardly in proportion to the degree of depression of the outer surface. An outer surface of the hinge shaft 70 at a position corresponding to an inner surface of the first through portion 30 protruding in proportion to a depth of the inner surface of the first through portion 30 protrudes inwardly toward the center of the circle. It is recessed inward.

While the inner surface of the first through portion 30 is formed to protrude inward, the outer surface of the hinge shaft 70 corresponding to the portion is recessed, the inner surface portion of the first through portion 30 protruding from the While being coupled to the outer surface of the hinge shaft 70 is formed, it prevents the hinge shaft 70 from being separated from the first through part (30).

That is, the separation preventing groove 80 protruding inwardly from the inner surface of the first through portion 30 is formed recessed inward from the outer surface of the first through portion 30 to form the depression of the hinge shaft 70. While being coupled to the outer surface to be separated from the hinge shaft 70 from the first through portion 30 is prevented.

On the other hand, the separation prevention groove 80 is also formed in the cover 90 and the second through portion (60). The separation preventing groove 80 formed in the second through part 60 performs a function of preventing the separation of the cover 90.

First, the protruding portion of the cover 90 is inserted upward through the open bottom surface of the second through portion 60 and is coupled through the open bottom surface of the second through portion 60.

When the cover 90 is coupled to the second through portion 60, the outer surface of the second through portion 60 into which the cylindrical shape of the cover 90 is inserted is inwardly directed toward the center portion of the circle. The separation preventing groove 80 is formed while pressing at a predetermined pressure.

The separation preventing groove 80 formed in the second through part 60 is formed to be located in the lower half of the second through part 60. This is because the separation preventing groove 80 is to be formed in the portion where the cylindrical shape projecting upward from the lower surface of the cover 90 is located.

In other words, the separation preventing groove 80 formed in the second through part 60 has the second through part 60 at a portion where a cylindrical shape is formed to protrude upward from the lower surface of the cover 90. While being squeezed from the outer surface of the separation prevention groove 80 is formed it is possible to prevent the separation of the cover (90).

The separation preventing groove 80 formed in the second through portion 60 is processed by the same method as the separation preventing groove 80 formed in the first through portion 30, so that additional description thereof will be omitted. Shall be.

Hereinafter, a method of manufacturing a hinge according to the present invention configured as described above with reference to FIG. 4 will be described.

First, the door assembly 10 having the door coupling part 20 coupled to the door and the first through part 30 integrally formed with the door coupling part 202 are manufactured. Since the door assembly 10 can be used interchangeably with the frame assembly 40, there is no need to separately manufacture the door assembly 10 and the frame assembly 40, thereby improving productivity, assembly and processability. It has the advantage of being improved.

The first through part 30 and the second through part 60 are positioned in the vertical direction, and the center thereof is positioned on the virtual same line in the vertical direction. When the first through portion 30 and the second through portion 60 is located in the up and down direction, the hinge shaft 70 is penetrating while passing from above the first through portion 30 downward; Proceeds.

The hinge shaft 70 penetrates the first through portion 30 in an up and down direction, and is coupled while being inserted into an inner space of the second through portion 60 at least partially positioned at a lower side thereof.

At this time, the friction preventing member 72 is interposed between the first through part 30 and the second through part 60. The friction preventing member 72 serves to prevent the first through portion 30 and the second through portion 60 from directly contacting the door to which the hinge is coupled.

Thus, even if the user rotates the door, the first through portion 30 and the second through portion 60 do not come into contact with each other.

The hinge shaft 70 penetrates the first through portion 30 in an up and down direction, and then the friction preventing member 72 is fitted to the hinge shaft 70 and penetrates the friction preventing member 72. The hinge shaft 70 is coupled to at least a portion of the hinge shaft 70 is inserted in the vertical direction.

As such, when the coupling of the hinge shaft 70 is completed, the assembler is fitted with a cover coupling step of fitting the cover 90 upward through the open lower surface of the second through part (60).

When the coupling of the cover 90 is completed, the separation prevention groove forming step of forming the separation prevention groove 80 in the first through portion 30 and the second through portion 60 is in progress. In the step of forming the release preventing groove 80, the outer surface portions of the first through portion 30 and the second through portion 60 is pressed with a predetermined pressure in the inward direction.

When the release preventing grooves 80 are formed by pressing a portion of the outer surface of the first through portion 30 and the second through portion 60 inward, the pressing force to form the release preventing groove 80 As a result, the hinge shaft 70 and the outer surface of the cover 90 are recessed inward.

As the inner surface of the hinge shaft 70 and the cover 90 is formed recessed inwardly, a protrusion projecting to the inner surfaces of the first through portion 30 and the second through portion 60 is fitted into the recessed portion. While being coupled, the separation of the hinge shaft 70 from the first through portion 30 is prevented, and the separation of the cover 90 from the second through portion 60 is prevented.

According to the configuration of the hinge according to the present invention, in the configuration of the door for selectively opening and closing a predetermined space and the hinge for rotation of the door is fixedly coupled to the frame supporting the door, by forming a departure prevention groove It is possible to expect the effect of improving assembly performance and productivity.

In addition, by the configuration of the hinge according to the invention the assembly and safety is improved to have the advantage of improving the reliability of the product and the safety of the user.

Due to such various advantages, it is likely to be used not only in the hinge industry but also in various industries related to the hinge.

10. Door assembly 20. Door assembly
21. Door fastening hole 30. First through hole
40. Frame assembly 50. Frame assembly
51. Frame fastening hole 60. Second through part
70. Hinge shaft 72. Friction preventing member
80. Departure prevention groove 90. Cover

Claims (7)

A door assembly having a door coupling part fixedly coupled to the door and a through part integrally formed with the door coupling part;
A frame assembly having a frame coupling part fixedly coupled to the frame supporting the door, and a through part integrally formed with the frame coupling part;
A hinge shaft which penetrates through the through part and serves as a center of rotation of the door assembly and the frame assembly;
A cover for shielding the through part in a direction opposite to the hinge shaft fastening direction; And
The hinge shaft is at least a separation prevention groove for preventing departure from any one of the combination of the door assembly and the frame assembly; The hinge is configured to include. The method of claim 1,
The separation preventing groove is formed in a position opposite to the door assembly and the frame assembly. The method of claim 1,
The release preventing groove is a hinge formed on the hinge shaft and the coupling body located on the upper side of the door assembly and the frame assembly. The method of claim 1,
The cover has a hinge is formed to prevent the departure from the combination of the door assembly and the frame assembly in a relatively lower position of the combination. The method of claim 1,
The door assembly and the frame assembly is a hinge formed to be compatible with each other. The door assembly having a door coupling part fixedly coupled to the door and a through part integrally formed with the door coupling part, and the frame assembly having a through part integrally formed with the frame coupling part fixedly coupled to the frame supporting the door. Coupling a hinge shaft which is a rotation center of the door assembly and the frame assembly;
Engaging a cover for shielding the through portion in a direction opposite to a fastening direction of the hinge shaft; And
Forming an escape preventing groove for preventing the hinge shaft from being separated from the door assembly and the frame assembly having a relatively upper position; Method of manufacturing a hinge comprising a. The method according to claim 6,
The release preventing groove is a hinge manufacturing method formed on the hinge shaft or the cover at the same time and the assembly located on the relatively upper side.
KR1020110088624A 2011-09-01 2011-09-01 Hinge and manufacturing method of it KR20130025227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110088624A KR20130025227A (en) 2011-09-01 2011-09-01 Hinge and manufacturing method of it

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Application Number Priority Date Filing Date Title
KR1020110088624A KR20130025227A (en) 2011-09-01 2011-09-01 Hinge and manufacturing method of it

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KR20130025227A true KR20130025227A (en) 2013-03-11

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100162A (en) * 2014-06-19 2014-10-15 常州市诺金精密机械有限公司 Low-noise hinge
KR20180002718U (en) 2017-03-09 2018-09-19 주식회사구보 Manufacturing apparatus for Hinge
CN110714674A (en) * 2019-10-17 2020-01-21 上海众冶实业有限公司 Seamless hinge and processing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104100162A (en) * 2014-06-19 2014-10-15 常州市诺金精密机械有限公司 Low-noise hinge
KR20180002718U (en) 2017-03-09 2018-09-19 주식회사구보 Manufacturing apparatus for Hinge
CN110714674A (en) * 2019-10-17 2020-01-21 上海众冶实业有限公司 Seamless hinge and processing method thereof

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