EP3925488B1 - Angle adjuster and furniture item using the same - Google Patents

Angle adjuster and furniture item using the same Download PDF

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Publication number
EP3925488B1
EP3925488B1 EP21178713.0A EP21178713A EP3925488B1 EP 3925488 B1 EP3925488 B1 EP 3925488B1 EP 21178713 A EP21178713 A EP 21178713A EP 3925488 B1 EP3925488 B1 EP 3925488B1
Authority
EP
European Patent Office
Prior art keywords
winding
tightening
rotating shaft
tightening member
outer peripheral
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP21178713.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3925488A1 (en
Inventor
Masanobu Yamashita
Takeshi Yamawaki
Akifumi SAWADA
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.)
Koyo Giken KK
Original Assignee
Koyo Giken KK
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 Koyo Giken KK filed Critical Koyo Giken KK
Publication of EP3925488A1 publication Critical patent/EP3925488A1/en
Application granted granted Critical
Publication of EP3925488B1 publication Critical patent/EP3925488B1/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
    • A47C1/027—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 clamps or friction locking members
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
    • A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
    • A47C1/0308—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests adjustable by rotation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/02—Upholstery attaching means
    • 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
    • A47C7/36—Support for the head or the back
    • A47C7/38—Support for the head or the back for the head
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G9/00—Bed-covers; Counterpanes; Travelling rugs; Sleeping rugs; Sleeping bags; Pillows
    • A47G9/10—Pillows

Definitions

  • the present invention relates to an angle adjuster used for a furniture item or the like, and particularly to an angle adjuster capable of avoiding destruction or damage of components when an overload is applied to the furniture item or the like.
  • an angle adjuster used for a furniture item or the like for example, a joint device having a configuration in which an inclination angle of a headrest or an armrest of a sofa can be adjusted to an angle preferred by a user is known (see JP 4519555 B2 ) .
  • a claw piece 4 is inserted in an engagement allowable portion 3a of a cam plate 3. Then, when a predetermined load is applied to a first metal jig 1, the load is received by the claw piece 4 at an engagement blocking portion 3b and a boundary step portion 32 with the engagement blocking portion 3b.
  • an object of the present invention is to provide an angle adjuster that can avoid destruction or damage of components of the angle adjuster when an overload is applied and that is reusable after the overload is removed, and a furniture item using the angle adjuster.
  • the present invention provides an angle adjuster as defined in independent claims 1-3.
  • the winding and tightening member rotates before the components undergo plastic deformation, thereby preventing the components from being destroyed or damaged, and thus the angle adjuster that is reusable after the overload is removed can be obtained.
  • a pair of the winding and tightening members may clamp the attachment portion of the rocking body.
  • the pair of winding and tightening members clamp the rocking body, which increases a holding strength.
  • the pair of winding and tightening members may clamp an annular flange protruding from the outer peripheral surface of the rotating shaft.
  • the pair of winding and tightening members clamp the annular flange of the rotating shaft, which increases the holding strength.
  • a furniture item of the present invention includes the angle adjuster described above.
  • the furniture item that can avoid destruction or damage of the components of the angle adjuster and that is reusable after the overload is removed. This eliminates the need for repairs because of destruction or damage of the components due to an overload and for a disposal of the entire furniture item.
  • an angle adjuster 10 according to a first embodiment is applied to an armrest 2 and a headrest 3 of a sofa 1.
  • the headrest 3 is formed by attaching a cushion material (not shown) to a core material 4 bridged between a pair of angle adjusters 10 and 10 disposed side by side and covering the headrest 3 with upholstery 5 such as leather or cloth.
  • the angle adjuster 10 is roughly configured by a support 20 and a rocking body 30.
  • the support 20 has a shape in which a round bar member is bent into a substantially L shape. Then, in the support 20, a retaining washer 22 and a washer 23 are inserted into an internal screw 21 provided at a lower end of the support 20, and a base material (not shown) disposed between the retaining washer 22 and the washer 23 can be fixed with a hexagon nut 24.
  • rocking body 30 can be connected to the support 20 by screwing a bolt 27 through the washer 26 into a flanged hexagon nut 28 inserted into a hexagonal hole 25 provided at a horizontal end of the support 20 ( FIG. 7 ).
  • the rocking body 30 is provided with a rib 31 for fixing the core material 4 with screws at one end of the rocking body 30 and an attachment portion 32 at the other end of the rocking body 30.
  • the attachment portion 32 is provided with a bearing recess 33 at a center of a tip of the attachment portion 32.
  • the attachment portion 32 is provided with a lower receiving portion 34 at a lower edge of the tip of the attachment portion 32, and an upper protrusion 35 is provided at an upper edge of the tip of the attachment portion 32.
  • the attachment portion 32 is provided with a caulking hole 36 and a shaft hole 37.
  • winding and tightening members 50 and 50 disposed so as to clamp an annular flange 42 of a rotating shaft 40 is attached to the attachment portion 32 of the rocking body 30 via a pair of reinforcing plates 62 and 62.
  • the rotating shaft 40 is located on an extension line of the rocking body 30.
  • the rotating shaft 40 has a hexagonal hole 41, and the annular flange 42 protruding from an outer peripheral surface 46 of the rotating shaft 40 is provided with a first claw portion 43, a second claw portion 44, and a third claw portion 45 at a predetermined pitch so as to protrude.
  • Each winding and tightening member 50 includes a winding and tightening member body 51, a winding and tightening portion 52 extending from the winding and tightening member body 51, having a shape that can be engaged with the outer peripheral surface 46 of the rotating shaft 40, and having a substantially J shape, and a support portion 53 extending from a free end of the winding and tightening portion 52.
  • the outer peripheral surface 46 of the rotating shaft 40 and an inner surface 54 of the winding and tightening portion 52 can be brought into surface contact ( FIG. 7 ).
  • the winding and tightening member body 51 is provided with a caulking hole 55 and an elongated hole 56 and with a position restraining protrusion 57 so as to protrude.
  • the support portion 53 is provided with a caulking hole 58.
  • the attachment portion 32 of the rocking body 30 is inserted between the support portions 53 and 53 of the winding and tightening members 50 and 50 for positioning.
  • a winding and tightening restraining shaft 60 is fitted into a shaft hole 37 of the attachment portion 32, and a release shaft 61 is fitted into the elongated hole 56 of each winding and tightening member 50.
  • the reinforcing plates 62 and 62 are assembled on outward surfaces of the winding and tightening members 50 and 50, respectively, and fitting holes 62a of the reinforcing plates 62 and 62 are fitted to the winding and tightening restraining shaft 60. Then, a first rivet 63 is inserted into the caulking hole 62b of the reinforcing plate 62, the caulking hole 58 of each winding and tightening member 50, and the caulking hole 36 of the rocking body 30 to be caulked and fixed.
  • a second rivet 64 is inserted into a caulking hole 62c of the reinforcing plate 62 and the caulking hole 55 of the winding and tightening member 50, is fitted into the bearing recess 33 of the rocking body 30, and is caulked and fixed, and thus assembling of the rocking body 30 is completed.
  • covers 70 and 72 having a front shape capable of entirely covering winding and tightening member 50 are combined from front and rear, and are detachably engaged and integrated with each other.
  • the flanged hexagon nut 28 is inserted through a fitting hole 71 of the cover 70, inserted into the hexagonal hole 41 of the rotating shaft 40, and then projected from a fitting hole 73 of the cover 72.
  • a tip of the flanged hexagon nut 28 projecting from the fitting hole 73 is inserted into the hexagonal hole 25 of the support 20, and the bolt 27 is screwed through the washer 26.
  • the support 20 and the rocking body 30 are connected and integrated, and the rotating shaft 40 is supported so as not to rotate with respect to the support 20.
  • a first state as an initial position as shown in FIGS. 9 and 10 , the winding and tightening member 50 having spring elasticity is fitted to the outer peripheral surface 46 of the rotating shaft 40.
  • the winding and tightening member body 51 and the winding and tightening portion 52 having a substantially J shape are in surface contact with the outer peripheral surface 46 of the rotating shaft 40 at a predetermined pressure, and a frictional force is generated. Therefore, the rocking body 30 is not rattled.
  • a distance between the winding and tightening member body 51 and the winding and tightening portion 52 is l 0 .
  • the distance between the winding and tightening member body 51 and the winding and tightening portion 52 is expanded to a distance l 1 (> l 0 ), and a winding and tightening force of the winding and tightening member 50 to the rotating shaft 40 is reduced. Therefore, a frictional force between the outer peripheral surface 46 of the rotating shaft 40 and the inner surface 54 of the winding and tightening portion 52 is reduced, and the rocking body 30 can be raised to an inclination angle preferred by a user.
  • the rocking body 30 rotates with the second rivet 64 as a fulcrum.
  • the winding and tightening member body 51 is pressed against the outer peripheral surface 46 of the rotating shaft 40 via the second rivet 64 and is not displaced, but the winding and tightening portion 52 is pulled down via the first rivet 63.
  • the winding and tightening portion 52 approaches the winding and tightening member body 51 to decrease the distance therebetween to a distance l 2 ( ⁇ l 0 ), and a tightening force of the winding and tightening member 50 to the rotating shaft 40 increases. Therefore, the frictional force between the outer peripheral surface 46 of the rotating shaft 40 and the inner surface 54 of the winding and tightening portion 52 increases, the rocking body 30 cannot rotate, and the headrest 3 maintains an inclination angle preferred by the user. The same applies when the angle adjuster is applied to the armrest 2.
  • the second state when an extremely large overload is applied in the arrow Q direction (reverse rotation direction), the second state turns into a third state shown in FIGS. 13 and 14 .
  • the rocking body 30 rotates with the second rivet 64 as a fulcrum, and the winding and tightening portion 52 is further pulled down as compared with the second state.
  • the distance between the winding and tightening member body 51 and the winding and tightening portion 52 is reduced to a distance l 3 ( ⁇ l 2 ), but the winding and tightening restraining shaft 60 abuts on the position restraining protrusion 57 of the winding and tightening member body 51, and the rotation of the rocking body 30 is blocked.
  • the frictional force between the outer peripheral surface 46 of the rotating shaft 40 and the inner surface 54 of the winding and tightening portion 52 reaches a maximum frictional force, and the frictional force does not increase any more.
  • the angle adjuster of the present invention there is an advantage that the components such as the winding and tightening member 50, the rotating shaft 40, the rocking body 30 and so on are not destroyed or damaged, and the angle adjuster 10 can be prevented from being broken or damaged when an overload is applied.
  • the rocking body 30 is further rotated in the arrow P direction (forward rotation direction) from the second state and displaced to a maximum range in which the inclination angle can be adjusted.
  • the release shaft 61 is locked to the second claw portion 44 of the rotating shaft 40 and is in pressure contact with the lower receiving portion 34.
  • the distance between the winding and tightening member body 51 and the winding and tightening portion 52 is the distance l 1 .
  • the rocking body 30 rotates with the second rivet 64 as a fulcrum.
  • the winding and tightening member body 51 is pressed against the outer peripheral surface 46 of the rotating shaft 40 via the second rivet 64 and is not displaced, but the winding and tightening portion 52 is pulled via the first rivet 63.
  • the winding and tightening portion 52 approaches the winding and tightening member body 51 to reduce the distance therebetween to the distance l 2 ( ⁇ l 0 ), and the tightening force of the winding and tightening member 50 to the rotating shaft 40 increases.
  • the headrest 3 maintains an inclination angle preferred by the user.
  • the rocking body 30 when the rocking body 30 is rotated, the lower receiving portion 34 runs over the release shaft 61 locked to the second claw portion 44, and is in a locked state. Therefore, the release shaft 61 is in pressure contact with the rotating shaft 40 via the winding and tightening member body 51 to restrain a displacement of the winding and tightening member body 51. At the same time, the upper protrusion 35 abuts on the third claw portion 45 and is positionally restrained. As a result, the distance between the winding and tightening member body 51 and the winding and tightening portion 52 is a distance l 4 (> l 0 ), and the winding and tightening force of the winding and tightening member 50 to the rotating shaft 40 decreases. Therefore, a state is maintained in which the frictional force between the outer peripheral surface 46 of the rotating shaft 40 and the inner surface 54 of the winding and tightening portion 52 is reduced, and the rocking body 30 can rotate in the arrow Q direction (reverse rotation direction).
  • a sixth state as shown in FIGS. 19 and 20 , when the rocking body 30 is rotated in the arrow Q direction (reverse rotation direction) from the fifth state, the winding and tightening member body 51 rotates in a reverse direction with the second rivet 64 as a fulcrum. Then, the release shaft 61 is locked to the first claw portion 43 and positionally restrained. Thus, the lower receiving portion 34 running over the release shaft 61 is released from the release shaft 61. Further, by rotating the rocking body 30 in the arrow Q direction (reverse rotation direction), the sixth state returns to the first state as the initial state.
  • the rocking body 30 can be operated by performing the same operation.
  • a second embodiment of the angle adjuster of the present invention is substantially the same as the first embodiment described above.
  • the rocking body 30 when the rocking body 30 is rotated in the arrow P direction (forward rotation direction) in the first state (initial state) shown in FIGS. 21 and 22 , the distance l 0 between the winding and tightening member body 51 and the winding and tightening portion 52 extends to the distance l 1 (not shown) . Therefore, the tightening force of the winding and tightening member body 51 and the winding and tightening portion 52 to the rotating shaft 40 is reduced, and the frictional force between the outer peripheral surface 46 of the rotating shaft 40 and the inner surface 54 of the winding and tightening portion 52 is reduced. As a result, the rocking body 30 can be adjusted to a desired inclination angle.
  • a third embodiment of the angle adjuster of the present invention is substantially the same as the first embodiment described above.
  • winding and tightening restraining shaft 65 provided in the attachment portion 32 of the rocking body 30 is fitted into a winding and tightening restraining elongated hole 59 provided in the support portion 53 of the winding and tightening member 50.
  • the rocking body 30 when the rocking body 30 is rotated in the arrow P direction (forward rotation direction) in the first state (initial state) shown in FIGS. 25 and 26 , the distance between the winding and tightening member body 51 and the winding and tightening portion 52 extends from the distance l 0 to the distance l 1 (not shown). Therefore, the tightening force of the winding and tightening member body 51 and the winding and tightening portion 52 to the rotating shaft 40 is reduced, and the frictional force between the outer peripheral surface 46 of the rotating shaft 40 and the inner surface 54 of the winding and tightening portion 52 is reduced. As a result, the rocking body 30 can be adjusted to an inclination angle desired by the user.
  • the maximum frictional force can be designed by adjusting the shape and positional relationship of the winding and tightening restraining elongated hole 59 and the winding and tightening restraining shaft 65. Therefore, there is an advantage that the angle adjuster operating stably is easily designed and manufactured.
  • the present invention is applicable not only to headrests and armrests of sofas as described above, but also to furniture items such as foldable beds and seats of vehicles, airplanes, and the like.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Dentistry (AREA)
  • Otolaryngology (AREA)
  • Pulmonology (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
EP21178713.0A 2020-06-18 2021-06-10 Angle adjuster and furniture item using the same Active EP3925488B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020105274A JP6830703B1 (ja) 2020-06-18 2020-06-18 角度調整器およびこれを用いた家具

Publications (2)

Publication Number Publication Date
EP3925488A1 EP3925488A1 (en) 2021-12-22
EP3925488B1 true EP3925488B1 (en) 2023-11-15

Family

ID=74562435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21178713.0A Active EP3925488B1 (en) 2020-06-18 2021-06-10 Angle adjuster and furniture item using the same

Country Status (6)

Country Link
EP (1) EP3925488B1 (ja)
JP (1) JP6830703B1 (ja)
KR (1) KR102523663B1 (ja)
CN (2) CN113812800A (ja)
ES (1) ES2968611T3 (ja)
PL (1) PL3925488T3 (ja)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4519555B2 (ja) 2004-07-28 2010-08-04 株式会社ヒカリ 関節装置
JP5232317B1 (ja) * 2012-05-01 2013-07-10 株式会社ヒカリ 角度調節器
PL228113B1 (pl) * 2014-07-18 2018-02-28 Stalmot & Wolmet Społka Akcyjna Przegub bezstopniowy, zwłaszcza do mebli tapicerowanych
EP3031357B1 (de) * 2014-12-09 2017-07-26 Schätti AG Schwenkbeschlag
JP2018000381A (ja) * 2016-06-29 2018-01-11 向陽技研株式会社 角度調整金具およびこれを用いたソファー

Also Published As

Publication number Publication date
PL3925488T3 (pl) 2024-05-13
KR102523663B1 (ko) 2023-04-20
JP2021194461A (ja) 2021-12-27
CN215959129U (zh) 2022-03-08
KR20210156740A (ko) 2021-12-27
ES2968611T3 (es) 2024-05-13
JP6830703B1 (ja) 2021-02-17
EP3925488A1 (en) 2021-12-22
CN113812800A (zh) 2021-12-21

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