KR101635449B1 - Locking tilt mechanism for back of chair - Google Patents

Locking tilt mechanism for back of chair Download PDF

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Publication number
KR101635449B1
KR101635449B1 KR1020160030411A KR20160030411A KR101635449B1 KR 101635449 B1 KR101635449 B1 KR 101635449B1 KR 1020160030411 A KR1020160030411 A KR 1020160030411A KR 20160030411 A KR20160030411 A KR 20160030411A KR 101635449 B1 KR101635449 B1 KR 101635449B1
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KR
South Korea
Prior art keywords
cylindrical cam
tilting
groove
key
locking
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Application number
KR1020160030411A
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Korean (ko)
Inventor
이규윤
Original Assignee
주식회사 다원체어스
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Priority to KR1020160030411A priority Critical patent/KR101635449B1/en
Application granted granted Critical
Publication of KR101635449B1 publication Critical patent/KR101635449B1/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/026—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • A47C1/0265—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism positioned under the arm-rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/62—Accessories for chairs

Abstract

The present invention relates to a chair back tilting lock apparatus, and more particularly, to a chair back tilting lock apparatus which can be easily locked by a simple operation so that a user can easily tilt the back.
To this end, the chair-back tilting lock device according to the present invention is integrally provided on one side or both sides of the backrest and has a key groove formed on its outer side to lock and unlock the tilting of the backrest and a spiral- A key formed to be inserted into and engaged with a cam groove of the cylindrical cam to move back and forth to the key groove side along the cam groove when the cylindrical cam is rotated and a case to provide a space in which the cylindrical cam and the key are installed, And an operation portion.

Figure R1020160030411

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking tilting mechanism for a chair,

The present invention relates to a chair back tilting lock apparatus, and more particularly, to a chair back tilting lock apparatus which can be easily locked by a simple operation so that a user can easily tilt the back.

Generally, the chair is provided with a backrest so that the user can sit comfortably.

Such a backrest is fixed, making it inconvenient for the user to move the waist while seated, thereby causing pain in the waist at the time of long sitting and increasing the fatigue of the seated person.

In order to solve the above problems, many chairs are used in which the angle of the backrest is adjusted (tilted).

The chair, whose angle of the backrest is adjusted, is often used as an elastic method in which the chair is turned back while maintaining elasticity according to the user's operation, and then returned to the original position when the user changes his or her posture.

The chair which is tilted by this elastic method can be used more conveniently by the user, but when the heavy user uses it, the backrest is excessively tilted. When the light weight user uses the chair, . Accordingly, even when tilting is not desired, a problem of unintentional tilting occurs.

In order to solve the above-described problem, a technique has been disclosed in which a tilting strength can be adjusted by adjusting the elasticity of the elastic portion in the prior art 1 (Korean Utility Model Registration No. 20-0315978 entitled: Tilting Strength Adjusting Device of Tilting Chair) .

However, the prior art 1 has a disadvantage in that it can not be fixed so that the tilting strength is controlled but the backrest is not tilted.

Also, since the structure for controlling the tilting strength is complicated, it is difficult to manufacture the tilting device, and the manufacturing cost increases accordingly.

Name of Design: Tilting Strength Control System for Tilting Chair

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a chair back tilting lock device which is simple in structure and can be locked and locked so that the user can easily tilt the back.

In order to accomplish the above object, according to the present invention, there is provided a chair rest tilting lock device comprising: a locking part integrally formed on one side or both sides of a backrest and having a key groove formed on an outer side thereof, for locking or unlocking a tilting of the backrest; A cylindrical cam having a helical cam groove formed on an outer circumference thereof and a key engaged with and engaged with the cam groove of the cylindrical cam to move back and forth along the cam groove along the cam groove when the cylindrical cam is rotated, And a tilting operation unit including a case for providing a space for allowing the user to operate the portable terminal.

Here, an operation lever extending from one side of the outer periphery of the cylindrical cam and operating the cylindrical cam is formed on one side of the cylindrical cam.

In addition, the cylindrical cam may further include a locking protrusion for fixing and holding the key in a forward or backward state to the other side of the outer circumference of the other lever provided with the operation lever.

At this time, the engaging protrusion is selectively fitted on the inner circumferential surface of the case at a position corresponding to the engaging projection, and a cylindrical cam intermittent groove for fixing and holding the cylindrical cam is formed.

Here, the cylindrical cam intermittent groove is composed of a lock groove for holding the cylindrical cam in a locked state while the engagement protrusion is selectively inserted, and a release groove for holding the cylindrical cam in a released state.

In the meantime, the case is formed with a slide groove guiding the key so that it can be moved only linearly as the cylindrical cam is rotated.

In addition, a cover for preventing the cylindrical cam from separating from the case or flowing is coupled to one side of the case.

The locking portion is further provided with a coupling shaft which is inserted through the center of the tilting operation portion and is capable of coupling the locking portion and the tilting operation portion.

Here, the tilting operation portion and the locking portion are engaged with the coupling shaft while the coupling pin is inserted into the coupling shaft.

On the other hand, below the case, a frame engaging portion coupled to a frame side forming a frame of a chair is integrally formed.

The chair back tilting lock apparatus according to the present invention can be fixed or released so that the backrest can not be tilted by a simple operation of turning the operation lever and can be manufactured with a simple structure and the production cost can be reduced.

1 is an overall perspective view of a chair-back tilting lock device according to a first embodiment of the present invention;
2 is an exploded perspective view of a chair-back tilting lock apparatus according to a first embodiment of the present invention.
3 is an enlarged view showing in detail the case structure of the chair-back tilting lock apparatus according to the first embodiment of the present invention
4A is an operational state diagram showing a state in which the backrest tilting of the chair-back tilting lock apparatus according to the first embodiment of the present invention is released
4B is an operational state diagram showing a state in which the backrest tilting of the chair-back tilting lock apparatus according to the first embodiment of the present invention is locked
5 is an overall perspective view of a chair-back tilting lock device according to a second embodiment of the present invention.
6 is an exploded perspective view of a chair-back tilting lock apparatus according to a second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration of a chair back tilting lock apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.

2 is an exploded perspective view of a chair-back tilting lock apparatus according to a first embodiment of the present invention. FIG. 3 is an exploded perspective view of the chair-back tilting lock apparatus according to the first embodiment of the present invention. 1 is an enlarged view showing a detailed structure of a case structure of a chair back tilting lock apparatus according to a first embodiment of the present invention;

Referring to FIGS. 1 to 3, the chair back tilting lock apparatus according to the present invention includes a lock portion 200 for locking or unlocking the tilting of the back 100, And a tilting operation unit 300 for locking or unlocking the lock unit 200 by moving the key 320 back and forth to the left and right sides.

The locking part 200 is provided integrally with the backrest 100 on one side or both sides of the backrest 100 and has a groove shaped key groove 210 corresponding to the key 320 at a position corresponding to the key 320 So that the tilting of the backrest 100 can be locked or unlocked while the key 320 slidable back and forth is inserted into or separated from the key groove 210 according to the operation of the cylindrical cam 310.

A rod-shaped coupling shaft 220 having a predetermined length is provided at the center of the lock portion 200. The tilting operation unit 300 is coupled to the locking unit 200 while passing through the coupling shaft 220.

The tilting operation unit 300 includes a cylindrical cam 310 for moving the key 320 back and forth, a key 320 coupled to the cylindrical cam 310 to move back and forth toward the lock unit 200, 310 and a case 330 in which a key 320 is installed.

At this time, the cylindrical cam 310 has a hollow cylindrical shape, and a spiral-shaped cam groove 311 is formed on the upper and lower outer peripheral faces.

The cam groove 311 moves the key 320 coupled to the cam groove 311 back and forth as the cylindrical cam 310 rotates.

Therefore, the key 320 can be moved back and forth simply by rotating the cylindrical cam 310.

The key 320 is formed of a rod-like rectangular parallelepiped, and a guide protrusion 321 is formed on a surface coupled to the cylindrical cam 310. As the guide protrusion 321 is fitted into the cam groove 311, the key 320 is moved back and forth toward the key groove 210 while being guided along the locus of the cam groove 311 when the cylindrical cam 310 rotates.

The case 330 has a cylindrical shape with an opened front face, and the cylindrical cam 310 and the key 320 described above are installed inside. Below the case 330, a frame engaging portion 332 having a rectangular block shape is integrally formed elongated.

The frame engaging portion 332 is fitted to the inside of the upper end opening of the frame 510 which constitutes the framework of the chair 500. Accordingly, the backrest 100 can be fixedly supported on the frame 510 through the frame engaging portion 332 integral with the case 330.

A slide groove 331 is formed in the inner periphery of the case 330 to guide the key 320 to move only in the forward and backward directions toward the lock portion 200 as the cylindrical cam 310 rotates .

The key 320 is linearly guided by the slide groove 331 formed in the case 330 so that the key 320 is fitted or disengaged from the key groove 210 formed in the lock portion 200 so that the back 100 is tilted It can be locked or unlocked.

Meanwhile, the cylindrical cam 310 is provided with an operation lever 312 that allows the user to easily operate the cylindrical cam 310 to lock or unlock the tilting of the back 100.

The operation lever 312 is extended from the outer circumferential side of the cylindrical cam 310, and the end portion is shaped like a trigger so that the user can stably grasp it.

The cylindrical cam 310 is provided with a locking protrusion 313 for blocking the rotation of the cylindrical cam 310 on the opposite side of the operation lever 312.

3, the locking protrusion 313 is fixedly held by the cylindrical cam intermittent groove 333 formed in the inner circumferential side surface of the case 330 at a predetermined depth, while the cylindrical cam 310 is not moved .

At this time, the cylindrical cam interlocking groove 333 has a lock groove 333a for holding the cylindrical cam 310 so that the cylindrical cam 310 is not moved in a state where the backrest 100 is locked, and a state in which the tilting of the back 100 is released And a release groove 333b for holding the cylindrical cam 310 so as not to move.

The locking projection 313 is selectively inserted into the locking groove 333a or the unlocking groove 333b so that the cylindrical cam 310 is held and fixed so that the key 320 is inserted into the key groove 210, It can be held fixedly.

An operation lever operating groove 335 is formed on the opened front face of the case 330 to which a cover to be described later is coupled. The operation lever operating groove 335 is recessed inside the predetermined section so that the operation lever 312 can be operated.

This allows the operating lever 312 to freely operate while the cylindrical cam 310 is coupled to the inside of the case 330.

2 to 3, the cylindrical cam 310 is detached from the opened side surface of the case 330 while the cylindrical cam 310 is installed inside the case 330, The cover 400 is fitted and coupled to prevent it from being generated.

The cover 400 is coupled to the cover 330 through a cover engagement hole 334 formed in the case 330 in an undercut manner.

Thus, the present invention minimizes occurrence of clearance when the cylindrical cam 310 rotates inside the case 330 without separating the cylindrical cam 310 from the case 330, thereby preventing malfunction.

2, the assembling structure of the tilting operation unit 300, the locking unit 200, the case 330, and the armrest 600 will be briefly described. The tilting operation unit 300 is coupled to the coupling shaft 220 provided in the lock unit 200 while being installed in the case 330. The armrests 600 are coupled to the front side of the case 330 in the direction in which the cover 400 is coupled.

At this time, the armrests 600, the tilting operation portion 300, and the locking portions 200 are coupled to each other by the coupling pins 700. Specifically, the coupling pin 700 passes through the tilting operation portion 300 located inside the armrest 600 while being inserted into the armrest 600 and inserted into the coupling shaft 220 of the locking portion 200 And the coupling is completed.

Hereinafter, the operating state of the chair-back tilting lock apparatus according to the first embodiment of the present invention will be described.

4A is an operational state diagram illustrating a state in which the backrest tilting of the chair-back tilting lock apparatus according to the first embodiment of the present invention is released.

4A, when the operation lever 312 is lowered (released), the locking protrusion 313 is held in the state of being fitted in the release groove 333b of the cylindrical cam interlocking groove 333, The key 320 coupled to the key groove 210 is retained in the key groove 210.

At this time, the locking part 200 provided integrally with the backrest 100 is not restrained by the key 320, so that the backrest 100 is freely tilted according to the user's posture.

4B is an operational state view showing a state where the backrest tilting of the chair-back tilting lock apparatus according to the first embodiment of the present invention is locked.

4B, when the operation lever 312 of the cylindrical cam 310 is moved upward (locked state), the locking projection 313 is fitted in the locking groove 333a of the cylindrical cam interlocking groove 333 So that the key 320 coupled to the cam groove 311 is retained in the key groove 210.

At this time, the key 320 is advanced to the lock portion 200 side along the locus of the cam groove 311 by the rotation of the cylindrical cam 310, and is inserted into the key groove 210 formed in the lock portion 200.

Thus, the locking part 200 provided integrally with the backrest 100 is kept locked by the key 320, so that the backrest 100 is fixed without being tilted even if the user changes his / her posture.

Hereinafter, a second embodiment of the present invention in which a case and an armrest are integrally formed will be described in detail with reference to the accompanying drawings.

FIG. 5 is an overall perspective view illustrating a chair-back tilting lock apparatus according to a second embodiment of the present invention, and FIG. 6 is an exploded perspective view showing a chair-back tilting lock apparatus according to a second embodiment of the present invention.

Referring to FIGS. 5 and 6, the chair rest tilting lock apparatus according to the second embodiment of the present invention has the same overall structure including the lock portion 200 and the tilting operation portion 300 as compared with the first embodiment. However, the first embodiment is a structure in which the case 330 in which the tilting operation unit 300 is installed and the armrests 600 are formed as separate structures and are coupled to each other. In the second embodiment, (600). Hereinafter, only the differences from the first embodiment will be described.

Referring to FIG. 6, the case 330 according to the second embodiment of the present invention is integrally formed inside the edge of the armrest 600 coupled to the lock portion 200. At this time, the tilting operation part 300 is coupled to the locking part 200 of the backrest 100 in a state of being assembled integrally with the armrest 600.

Therefore, the second embodiment of the present invention can manufacture the armrest 600 and the case 330 as a single mold, thereby saving the production cost and reducing the manufacturing costs of the backrest 100 and the armrest 600, So that it is possible to assemble more easily.

The present invention having the above-described structure can easily lock or unlock the tilting of the chair back as desired, thereby minimizing the fatigue caused by sitting in the back without causing pain in the back even when the user is seated for a long time by manipulating tilting as required . In addition, since a simple structure can be manufactured, the production cost is lowered, and assembling can be facilitated, resulting in an increase in work efficiency due to assembly.

100: backrest 200:
210: key groove 220: engagement shaft
300: a tilting operation unit 310: a cylindrical cam
311: Cam groove 312: Operation lever
313: locking protrusion 320: key
321: Guide protrusion 330: Case
331: slide groove 332: frame engaging portion
333: Cylinder cam intermittent groove 333a: Lock groove
333b: release groove 334: cover engagement hole
335: Operation lever operation groove 400: Cover
410: Union 500: Chair
510: frame 600: armrest
700: coupling pin

Claims (10)

A locking part 200 integrally formed on one side or both sides of the backrest 100 and having a key groove 210 formed on the outside thereof to lock or unlock the tilting of the backrest 100; And
A cylindrical cam 310 having a spiral-shaped cam groove 311 formed on its outer periphery and a cam groove 311 of the cylindrical cam 310. When the cylindrical cam 310 is rotated, And a tilting operating part 300 including a key 320 moving back and forth toward the key groove 210 and a case 330 providing a space in which the cylindrical cam 310 and the key 320 are installed Features a chair backrest tilting lock.
The method according to claim 1,
Wherein an operation lever (312) extending from one side of the outer circumference of the cylindrical cam (310) to operate the cylindrical cam (310) is formed at one side of the cylindrical cam (310).
The method of claim 2,
The cylindrical cam 310 is further provided with a locking protrusion 313 for fixing and holding the key 320 in a forward or backward state to the other side of the outer periphery provided with the operation lever 312 Features a chair backrest tilting lock.
The method of claim 3,
A cylindrical cam intermittent groove 333 for fixing and holding the cylindrical cam 310 is formed at one side of the circumference of the case 330 so that the locking protrusion 313 is selectively fitted at a position corresponding to the locking protrusion 313 A chair backrest tilting lock device.
The method of claim 4,
The cylindrical cam intermittent groove 333 includes a locking groove 333a for selectively locking the locking projection 313 to maintain the cylindrical cam 310 in a locked state, And a release groove (333b) for retaining the seat back.
The method according to claim 1,
Wherein the case (330) is formed with a slide groove (331) for guiding the key (320) to slide only in a straight line as the cylindrical cam (310) is rotated.
The method according to claim 1,
Wherein a cover (400) is coupled to one side of the case (330) to prevent the cylindrical cam (310) from separating from or moving from the case (330).
The method according to claim 1,
The locking unit 200 is further provided with a coupling shaft 220 inserted into the center of the tilting unit 300 and capable of coupling the locking unit 200 and the tilting unit 300 with each other. Chair backrest tilting lock.
The method of claim 8,
Wherein the tilting operation part (300) and the locking part (200) are engaged with the coupling pin (700) while being fitted to the coupling shaft (220).
The method according to claim 1,
And a frame engaging portion (332) coupled to the frame (510) side of the chair (500) is integrally formed under the case (330).
KR1020160030411A 2016-03-14 2016-03-14 Locking tilt mechanism for back of chair KR101635449B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210115198A (en) * 2020-03-12 2021-09-27 이영수 Lever module FOR limiting TILT operating Range of BACKREST CHAIR and CHAIR FOR adjusting backrest tilt using the same
KR102318357B1 (en) * 2021-06-24 2021-11-01 (주)광일체어 Frame chair with back tilting step-by-step adjustment structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200315978Y1 (en) 2003-03-18 2003-06-11 주식회사 일룸 apparatus for adjusting a tilting intensity of a tilting chair
KR20100106677A (en) * 2009-03-24 2010-10-04 김현곤 Folding chair with tilting back
KR101355473B1 (en) * 2012-03-12 2014-01-29 주식회사 체어로 A chair
KR101588702B1 (en) * 2015-06-29 2016-01-27 김란순 Tilling Chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200315978Y1 (en) 2003-03-18 2003-06-11 주식회사 일룸 apparatus for adjusting a tilting intensity of a tilting chair
KR20100106677A (en) * 2009-03-24 2010-10-04 김현곤 Folding chair with tilting back
KR101355473B1 (en) * 2012-03-12 2014-01-29 주식회사 체어로 A chair
KR101588702B1 (en) * 2015-06-29 2016-01-27 김란순 Tilling Chair

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210115198A (en) * 2020-03-12 2021-09-27 이영수 Lever module FOR limiting TILT operating Range of BACKREST CHAIR and CHAIR FOR adjusting backrest tilt using the same
KR102376511B1 (en) * 2020-03-12 2022-03-17 이영수 Lever module FOR limiting TILT operating Range of BACKREST CHAIR and CHAIR FOR adjusting backrest tilt using the same
KR102318357B1 (en) * 2021-06-24 2021-11-01 (주)광일체어 Frame chair with back tilting step-by-step adjustment structure

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