AU2020200787B1 - Elastic seesaw-type variable tilting ratio mechanism and swivel chair having the same - Google Patents

Elastic seesaw-type variable tilting ratio mechanism and swivel chair having the same Download PDF

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Publication number
AU2020200787B1
AU2020200787B1 AU2020200787A AU2020200787A AU2020200787B1 AU 2020200787 B1 AU2020200787 B1 AU 2020200787B1 AU 2020200787 A AU2020200787 A AU 2020200787A AU 2020200787 A AU2020200787 A AU 2020200787A AU 2020200787 B1 AU2020200787 B1 AU 2020200787B1
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AU
Australia
Prior art keywords
support
backrest
locking member
elastic
seat
Prior art date
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Active
Application number
AU2020200787A
Inventor
Angela An_Qi Yan
Cheng Yu Yan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yan Angela An_qi Miss
Yan Cheng Yu Mr
Original Assignee
Yan Angela An_qi Miss
Yan Cheng Yu Mr
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Publication date
Application filed by Yan Angela An_qi Miss, Yan Cheng Yu Mr filed Critical Yan Angela An_qi Miss
Priority to AU2020200787A priority Critical patent/AU2020200787B1/en
Publication of AU2020200787B1 publication Critical patent/AU2020200787B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • 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
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/03—Locking members
    • 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
    • A47C7/002—Chair or stool bases
    • A47C7/006—Chair or stool bases with castors

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

An elastic seesaw-type variable tilting ratio mechanism and swivel chair having the elastic seesaw type variable tilting ratio mechanism allows the seat and the backrest to be adjustable independently or simultaneously within a range and allows the seat and the backrest to be tilted in variable ratio for individual using.

Description

DETAILED DESCRIPTION OF THE PREFERRED
EMBODIMENTS
Please refer to Figs. 1 to 8 for a preferable embodiment of the present invention. An elastic seesaw-type variable tilting ratio mechanism 1 includes a base support 10, a seat support 20, a backrest support 30, a first elastic mechanism 40 and a second elastic mechanism 50.
The base support 10 is configured to be connected with a chair base 101 through a chair column 104; the seat support 20 is pivotally mounted on the base support 10 and configured to be connected with a seat 102; the backrest support 30 is pivotally mounted on the base support 10 and configured to be connected with a backrest 103; the first elastic mechanism 40 is connected with the seat support 20 and the backrest support 30 to form an elastic seesaw mechanism; the second elastic mechanism 50 is connected with the base support 10 and the seat support 20, the second elastic mechanism 50 and the first elastic mechanism 40 are respectively biased against the seat support 20 in opposite directions. Therefore, the seat 102 and the backrest 103 are independently free adjustable within a sufficient range.
The base support 10, the seat support 20 and the backrest support 30 are pivotally mounted on a shaft 60, and the shaft 60 servers as a fulcrum and a pivot axis of the first
2020200787 12 Feb 2020 elastic mechanism 40 and the elastic seesaw mechanism. The first elastic mechanism 40 is a torsion spring and pivotally connected with the shaft 60. The first elastic mechanism 40 is pivotably disposed around the shaft 60. However, the first elastic mechanism may be a flat spring, torsion bar, compression spring, extension spring or other elastic or resilient members capable of providing elastic potential energy; the first elastic mechanism may include two elastic components (such as elastic or resilient members described above) or be configured with any of the elastic or resilient members described above to exert force on the seat support and the backrest support.
One of the base support 10 and the backrest support 30 includes at least one guiding groove, and the other of the base support 10 and the backrest support 30 includes at least one guiding member movably disposed within the at least one guiding groove. In this embodiment, the base support 10 includes at least one guiding groove 11, the backrest support 30 includes at least one guiding member 31 movably disposed within the at least one guiding groove 11. Preferably, the at least one guiding groove 11 is an arcuate groove so that the backrest support 30 is stably and smoothly swingable along the at least one guiding groove 11.
The second elastic mechanism 50 includes at least one compression spring or extension spring which is abutted against or connected between the base support 10 and the seat support 20. In this example, the second elastic mechanism 50 is a compression spring. The seat support 20 further includes a seat support adjusting shaft 21, two ends of
2020200787 12 Feb 2020 the first elastic mechanism 40 respectively bias the guiding member 31 and the seat support adjusting shaft 21 in opposite directions, the compression spring and the torsion spring respectively exert force on the seat support 20 at opposite sides of the shaft 60 so that the seat support 20 is under a torque balance state. Preferably, the base support 10 and the seat support 20 may, respectively, include a receiving groove, a column or the like configured for the compression spring to be stably disposed thereon. The second elastic mechanism may be configured to include a compression spring and an extension spring, or a flat spring, torsion bar or other elastic or resilient members capable of providing elastic potential energy. The second elastic mechanism is configured to provide an elastic force which is upward exerted on the seat support, and a direction of the elastic force is opposite to a force that the first elastic mechanism exerted on the seat support so as to provide balance effect. Therefore, the seat and the backrest can automatically and steplessly balance with each other so as to be suitable for various users’ requirements.
In this embodiment, the elastic seesaw-type tilting mechanism 1 further includes an associated lock mechanism 70, and the base support 10 includes a lock axle 12. The associated lock mechanism 70 includes a seat support locking member 71 which is connected with the seat support 20 and adjustably connected with the lock axle 12, a backrest support locking member 72 which is connected with the backrest support 30 and adjustably connected with the lock axle 12, and a locking device 73 which is operable to lock or unlock the lock axle 12, the seat support locking member 71 and the backrest support
2020200787 12 Feb 2020 locking member 72. The lock axle 12 is disposed through a guiding groove 711 of the seat support locking member 71 and a guiding groove 721 of the backrest support locking member 72, the guiding groove 711 of the seat support locking member 71 and the guiding groove 721 of the backrest support locking member 72 allow movement of the seat support locking member 71 and the backrest support locking member 72 relative to the lock axle 12. Preferably, the guiding grooves 711, 721 are arcuate grooves so that the seat support 20 and the backrest support 30 are stably and smoothly swingable along the guiding grooves 711, 721 respectively. The locking device 73 includes a lever 731 disposed on the base support 10 and a compression spring 732 sleeved on the lock axle 12. An end of the lever 731 includes a rolling portion 733 (such as a roller) which is movable by pulling the lever 731 so as to lock or unlock the seat support locking member 71 and the backrest support locking member 72. The compression spring may be any other components and materials configured to lock or unlock the seat support locking member and the backrest support locking member. The locking device may include a plurality of positioning holes which are disposed on the seat support or/and the backrest support and at least one pin disposed on the base support, the at least one pin may be restrictedly moved, by a lever or cable for example, and inserted within one of the plurality of positioning holes after adjustment so as to maintain a configuration of the elastic seesaw-type variable tilting ratio mechanism.
Figures 9 to 11 show another preferable embodiment of the present invention. The elastic seesaw-type variable tilting ratio mechanism 1a further includes a seat support
2020200787 12 Feb 2020 locking device 74, a backrest support locking device 75, a seat support locking member 71 and a backrest support locking member 76. The base support 10 includes a lock axle 12, the backrest support 30 includes a lock axle 32, and the seat support locking member 71 is connected with the seat support 20 and adjustably connected with the lock axle 12 of the base support 10. The backrest support locking member 76 is connected with the seat support 20 and adjustably connected with the lock axle 32 of the backrest support 30. The seat support locking device 74 is operable to lock or unlock the seat support locking member 71 and the lock axle 12 of the base support 10, and the backrest support locking device 75 is operable to lock or unlock the backrest support locking member 76 and the lock axle 32 of the backrest support 30. The lock axle 12 of the base support 10 is disposed through a guiding groove 711 of the seat support locking member 71, and the guiding groove of the seat support locking member 71 allows movement of the seat support locking member 71 relative to the lock axle 12 of the base support 10. The lock axle 32 of the backrest support 30 is disposed through a guiding groove 761 of the backrest support locking member 76, and the guiding groove 761 of the backrest support locking member 76 allows movement of the backrest support locking member 76 relative to the lock axle 32 of the backrest support 30. Therefore, the seat support 20 and the backrest support 30 are adjustable and positioned independently.
The present invention further provides a swivel chair 100 which includes one of the elastic seesaw-type variable tilting ratio mechanisms described above, further including a
2020200787 12 Feb 2020 seat 102, a backrest 103, a chair column 104 and a chair base 101. Preferably, the chair column 104 is a gas spring, and the gas spring is connected between the base support 10 and the chair base 101 and the base support 10 is liftable relative to the chair base 101.
In summary, the elastic seesaw-type variable tilting ratio mechanism of the present invention allows the seat and the backrest to be adjustable and lockable independently or simultaneously so as to meet individual requirements. The swivel chair with the elastic seesaw-type variable tilting ratio mechanism can sufficiently satisfy the user’s requirements for reclining comfortability and increase delight in using experience.
2020200787 12 Feb 2020
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a stereogram of a swivel chair of a preferable embodiment of the present invention;
Fig. 2 is a breakdown drawing of a tilting mechanism of a preferable embodiment of the present invention;
Fig. 3 is a stereogram of a tilting mechanism of a preferable embodiment of the present invention;
Fig. 4 is a cross-sectional view of a tilting mechanism of a preferable embodiment of the present invention;
Fig. 5 is a schematic diagram of a tilting mechanism of a preferable embodiment of the present invention in operation;
Fig. 6 is a top view of a tilting mechanism of a preferable embodiment of the present invention;
Figs. 7 and 8 are schematic diagrams showing locking of a tilting mechanism of a preferable embodiment of the present invention;
Fig. 9 is a stereogram of a tilting mechanism of another preferable embodiment of the present invention;
2020200787 12 Feb 2020
Figs. 10 and 11 are schematic diagrams showing locking of a tilting mechanism of another preferable embodiment of the present invention.

Claims (10)

  1. WHAT I CLAIM IS
    1. An elastic seesaw-type variable tilting ratio mechanism (1, 1a), including:
    a base support (10), configured to be connected with a chair base (101) through a chair column (104);
    a seat support (20), being pivotably mounted on the base support (10) and configured to be connected with a seat (102);
    a backrest support (30), being pivotally mounted on the base support (10) and configured to be connected with a backrest (103);
    a first elastic mechanism (40), being connected with the seat support (20) and the backrest support (30) to form an elastic seesaw mechanism; and a second elastic mechanism (50), being connected with the base support(10) and the seat support (20), the second elastic mechanism (50) and the first elastic mechanism (40) being respectively biased against the seat support(20) in opposite directions.
    characterized in that
    2020200787 04 Feb 2020 the base support (10), the seat support (20) and the backrest support (30) are pivotally mounted on a shaft (60), the first elastic mechanism (40) being pivotally disposed around the shaft (60), and the shaft (60) serves as a fulcrum and a pivot axis of the first elastic mechanism (40) and a fulcrum and a pivot axis of the elastic seesaw-type variable tilting ratio mechanism.
  2. 2. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 1, wherein the second elastic mechanism (50) is disposed between the base support (10) and the seat support (20).
  3. 3. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 1, wherein one of the base support (10) and the backrest support (30) includes at least one guiding groove (11), and the other of the base support (10) and the backrest support (30) includes at least one guiding member (31) movably disposed within the at least one guiding groove (11).
  4. 4. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 1, further including an associated locking mechanism (70), wherein the base support (10) includes a lock axle (12), the associated lock mechanism (70) includes a seat support locking member (71) which is connected with the seat support (20) and adjustably connected with the lock axle (12) ,a
    2020200787 04 Feb 2020 backrest support locking member (72) which is connected with the backrest support (30) and adjustably connected with the lock axle (12) , and a locking device (73) which is operable to lock or unlock the lock axle (12) , the seat support locking member (71) and the backrest support locking member (72) .
  5. 5. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 4, wherein the lock axle (12) is disposed through a guiding groove (711) of the seat support locking member (71) and a guiding groove (721) of the backrest support locking member (72), the guiding groove (711) of the seat support locking member (71) and the guiding groove (721) of the backrest support locking member (72) allow movement of the seat support locking member (71) and the backrest support locking member (72) relative to the lock axle (12).
  6. 6. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 1, further including a seat support locking device (74), a backrest support locking device (75), a seat support locking member (71) and a backrest support locking member (76), wherein the base support (10) includes a lock axle (12), the backrest support (30) includes a lock axle (32),
    2020200787 04 Feb 2020 the seat support locking member (71) is connected with the seat support (20) and adjustably connected with the lock axle (12) of the base support (10), the backrest support locking member (76) is connected with the seat support (20) and adjustably connected with the lock axle (32) of the backrest support (30), the seat support locking device (74) is operable to lock or unlock the seat support locking member (71) and the lock axle (12) of the base support (10), and the backrest support locking device (75) is operable to lock or unlock the backrest support locking member (76) and the lock axle (32) of the backrest support (30) .
  7. 7. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 6, wherein the lock axle (12) of the base support (10) is disposed through a guiding groove (711) of the seat support locking member (71), the guiding groove (711) of the seat support locking member (71) allows movement of the seat support locking member (71) relative to the lock axle (12) of the base support (10); the lock axle (32) of the backrest support (30) is disposed through the a guiding groove (761) of the backrest support locking member (76), the guiding groove (761) of the backrest support
    2020200787 04 Feb 2020 locking member (76) allows movement of the backrest support locking member (76) relative to the lock axle (32) the backrest support (30).
  8. 8. The elastic seesaw-type variable tilting ratio mechanism (1,1a) according to claim 5, wherein the second elastic mechanism (50) is disposed between the base support (10) and the seat support (20); the base support (10) includes at least one guiding groove (11), the backrest support (30) includes at least one guiding member (31) movably disposed within the at least one guiding groove (11) ; the seat support (20) further includes a seat support adjusting shaft (21) , two ends of the first elastic mechanism (40) respectively bias the guiding member (31) and the seat support adjusting shaft (21) in opposite directions; the first elastic mechanism ( 40) and the second elastic mechanism (50) respectively exert force, in opposite directions, on the seat support (20) so that the seat support (20 ) is under a torque balance state.
  9. 9. A swivel chair (100) , including one of the elastic seesaw-type variable tilting ratio mechanism (1,1a) according to any of preceding claims, further including a seat (102), a backrest (103), a chair column (104) and a chair base(101), the backrest (103) connected with the backrest support (30).
    2020200787 04 Feb 2020
  10. 10. The swivel chair (100)according to claim 9, wherein the chair column (104) is a gas spring, and the base support (10) is liftable relative to the chair base (101).
AU2020200787A 2020-02-04 2020-02-04 Elastic seesaw-type variable tilting ratio mechanism and swivel chair having the same Active AU2020200787B1 (en)

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AU2020200787A AU2020200787B1 (en) 2020-02-04 2020-02-04 Elastic seesaw-type variable tilting ratio mechanism and swivel chair having the same

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AU2020200787A AU2020200787B1 (en) 2020-02-04 2020-02-04 Elastic seesaw-type variable tilting ratio mechanism and swivel chair having the same

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7312840U (en) * 1974-09-12 Kerstholt F Seating and / or reclining furniture with a movable back

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7312840U (en) * 1974-09-12 Kerstholt F Seating and / or reclining furniture with a movable back

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