WO2021115168A1 - 一种靠背可调折叠椅 - Google Patents

一种靠背可调折叠椅 Download PDF

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Publication number
WO2021115168A1
WO2021115168A1 PCT/CN2020/133239 CN2020133239W WO2021115168A1 WO 2021115168 A1 WO2021115168 A1 WO 2021115168A1 CN 2020133239 W CN2020133239 W CN 2020133239W WO 2021115168 A1 WO2021115168 A1 WO 2021115168A1
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WO
WIPO (PCT)
Prior art keywords
tube
backrest
armrest
folding chair
telescopic
Prior art date
Application number
PCT/CN2020/133239
Other languages
English (en)
French (fr)
Inventor
杨宝庆
Original Assignee
浙江泰普森实业集团有限公司
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
Priority claimed from CN201922238267.5U external-priority patent/CN211608824U/zh
Priority claimed from CN201911283707.7A external-priority patent/CN112971421A/zh
Application filed by 浙江泰普森实业集团有限公司 filed Critical 浙江泰普森实业集团有限公司
Publication of WO2021115168A1 publication Critical patent/WO2021115168A1/zh

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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
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/08—Folding chairs with inflexible seats having a frame made of wood or plastics
    • A47C4/10—Folding chairs with inflexible seats having a frame made of wood or plastics with legs pivotably connected to seat or underframe
    • A47C4/12—Folding chairs with inflexible seats having a frame made of wood or plastics with legs pivotably connected to seat or underframe of adjustable type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/18—Folding chairs with inflexible seats having a frame made of metal
    • A47C4/20—Folding chairs with inflexible seats having a frame made of metal with legs pivotably connected to seat or underframe
    • A47C4/22—Folding chairs with inflexible seats having a frame made of metal with legs pivotably connected to seat or underframe of adjustable type

Definitions

  • the invention relates to the technical field of folding chairs, and more specifically, to a folding chair with adjustable backrest.
  • Folding chairs on the market are divided into two types: adjustable backrest angle and non-adjustable backrest angle.
  • the backrest angle is adjusted by the angle adjuster between the backrest and the seat tube, or by changing the position of the armrest relative to the front leg tube.
  • the object of the present invention is to provide a folding chair with adjustable backrest, which can realize the rapid adjustment of the backrest of the folding chair and make the adjustment process easy to operate.
  • a folding chair with adjustable backrest includes: a bracket body hingedly connected by a plurality of connecting pipes, a rear support leg, a front support leg, and an angle adjustment mechanism,
  • Both ends of the angle adjustment mechanism are respectively connected to the two connecting pipes in the stent body, so that the angle adjustment mechanism and the two connecting pipes in the stent body form a variable triangle.
  • the triangle is used to adjust the backrest angle of the folding chair.
  • the bracket body includes a back tube and a seat tube hingedly connected to the back tube;
  • One end of the angle adjustment mechanism is connected to the backrest tube, and the other end is connected to the seat tube, so that the angle adjustment mechanism, the backrest tube and the seat tube form an angle-adjustable triangle.
  • one of the backrest tube and the seat tube is hingedly connected to one end of the angle adjustment mechanism, and the other is slidably connected to the other end of the angle adjustment mechanism;
  • the position of the angle adjustment mechanism relative to the back tube or the seat tube is adjusted to make the back tube rotate relative to the seat tube.
  • the angle adjustment mechanism is a telescopic structure, and one end of the angle adjustment mechanism is connected to the back tube, and the other end is connected to the seat tube.
  • the telescopic structure is elongated or shortened so that the The backrest tube rotates relative to the seat tube.
  • the bracket body includes a back tube, a seat tube, an armrest tube, and an armrest support tube, one end of the seat tube is hingedly connected to the back tube, and the other end is hingedly connected to the armrest support tube; One end of the armrest tube is hingedly connected to the backrest tube, and the other end is hingedly connected to the armrest support tube;
  • One end of the angle adjustment mechanism is connected to one of the armrest tube, the armrest support tube, the backrest tube, and the seat tube, and the other end is connected to the armrest tube, the armrest support tube, The other of the backrest tube and the seat tube, so that a variable triangle exists in the parallelogram formed by the armrest tube, the armrest support tube, the backrest tube, and the seat tube, By adjusting the triangle, the backrest tube is rotated relative to the seat tube.
  • one end of the angle adjustment mechanism is slidably connected to the armrest tube, and the other end is hingedly connected to the backrest tube or the seat tube, and the position of the angle adjustment mechanism relative to the armrest tube is adjusted to The backrest tube is rotated relative to the seat tube.
  • the angle adjustment mechanism is a telescopic structure, and one end of the angle adjustment mechanism is connected to the armrest tube, and the other end is hingedly connected to the backrest tube or the seat tube, and the telescopic structure is elongated or Shorten so that the backrest tube rotates relative to the seat tube.
  • the angle adjustment mechanism is slidable and fixable relative to the armrest tube.
  • the telescopic structure includes an outer telescopic tube, an inner telescopic tube, and a telescopic locking structure for fixing or moving the inner telescopic tube relative to the outer telescopic tube;
  • One end of the outer telescopic tube is slidably connected to one connecting tube in the bracket body, and the other end is sleeved on the outer periphery of the inner telescopic tube, and the inner telescopic tube is hingedly arranged on the other connecting tube in the bracket body tube.
  • it further includes a limit block connected with the outer telescopic tube, and the limit block is provided with a cylindrical connecting portion for connecting with the outer telescopic tube and a sliding connection for sliding connection with the armrest tube Section;
  • the outer telescopic tube is connected to the cylindrical connecting portion.
  • the telescopic locking structure is a one-way locking structure to prevent the backrest tube from rotating backward relative to the seat tube.
  • the telescopic locking structure is provided with a toggle for controlling the relative locking or unlocking of the inner telescopic tube and the outer telescopic tube.
  • the telescopic locking structure is provided with a device for providing resilience when the backrest tube rotates forward relative to the seat tube, or when the backrest tube rotates backward relative to the seat tube
  • a cushioning device for cushioning is provided.
  • the buffer device is a spring.
  • the number of the armrest tube, the seat tube, the armrest support tube, and the telescopic structure are all two, and the armrest tube, the seat tube, the armrest support tube, and the telescopic structure
  • the structures are symmetrically arranged on the left and right sides of the backrest tube.
  • the ends of the rear support leg and the front support leg are both provided with a foot, and the rear support leg and the front support leg are both rotatably connected with the foot.
  • the backrest adjustable folding chair provided by the present invention includes: a bracket body hingedly connected by a plurality of connecting pipes, a rear support leg, a front support leg, and an angle adjustment mechanism,
  • the two ends of the angle adjusting mechanism are respectively connected to the two connecting pipes in the bracket body, so that the angle adjusting mechanism and the two connecting pipes in the bracket body form a variable triangle. By adjusting the triangle, the backrest angle of the folding chair can be adjusted. .
  • the rear support leg and the front support leg are rotated to a state in contact with the ground to support the stent body and make the stent body in a stable state;
  • the angle adjustment mechanism is formed by the two connecting pipes in the stent body The angle or side length of the triangle to change the angle of the backrest of the folding chair.
  • the backrest adjustable folding chair provided by the present invention can realize the stepless adjustment of the backrest angle, and only needs to control the angle adjustment mechanism during the adjustment process, which simplifies the adjustment process operation.
  • Figure 1 is an isometric view of specific embodiment one of the folding chair with adjustable backrest provided by the present invention
  • Fig. 2 is an axonometric view of another observation angle of the folding chair with adjustable backrest in Fig. 1;
  • Fig. 3 is a side view of the backrest tube of the adjustable backrest folding chair in Fig. 1 at a first angle;
  • Fig. 4 is a side view of the backrest tube of the adjustable backrest folding chair in Fig. 1 at a second angle;
  • Fig. 5 is a side view of the backrest tube of the adjustable backrest folding chair in Fig. 1 at a third angle;
  • Fig. 6 is a side view of the folding state of the adjustable backrest folding chair in Fig. 1;
  • Figure 7 is a side view of the second specific embodiment of the folding chair with adjustable backrest provided by the present invention.
  • Fig. 8 is a side view of the backrest tube of the adjustable backrest folding chair in Fig. 9 at another angle;
  • Figure 9 is a side view of the third embodiment of the adjustable backrest folding chair provided by the present invention.
  • Figure 10 is a side view of the fourth embodiment of the folding chair with adjustable backrest provided by the present invention.
  • Figure 11 is a side view of the fifth embodiment of the folding chair with adjustable backrest provided by the present invention.
  • Figure 12 is a schematic structural diagram of a telescopic locking structure
  • Figure 13 is a schematic diagram of the structure of the limit block.
  • 01 is the angle adjustment mechanism
  • 1 is the back tube
  • 2 is the armrest tube
  • 3 is the outer telescopic tube
  • 4 is the telescopic locking structure
  • 5 is the inner telescopic tube
  • 6 is the connector
  • 7 is the seat tube
  • 8 is the limiter Block 9 is an armrest support tube
  • 10 is a rear support leg
  • 11 is a front support leg.
  • the core of the present invention is to provide a folding chair with adjustable backrest, which can realize stepless adjustment of the rotation angle of the backrest, and the adjustment process is simple and convenient.
  • Figure 1 is an axonometric view of specific embodiment 1 of the folding chair with adjustable backrest provided by the present invention
  • Figure 2 is an axonometric view of another observation angle of the folding chair with adjustable backrest in Figure 1
  • Figure 3 is a side view of the backrest tube of the adjustable folding chair in Figure 1 at a first angle
  • Figure 4 is a side view of the backrest tube of the adjustable folding chair in Figure 1 at a second angle
  • Figure 5 is Fig. 1 is a side view of the backrest tube of the adjustable backrest folding chair at a third angle
  • Fig. 6 is a side view of the folded backrest adjustable folding chair in Fig. 1
  • FIG. 7 is the adjustable backrest folding chair provided by the present invention
  • the side view of the specific embodiment two is a side view of the backrest tube of the adjustable backrest folding chair in Figure 9 at another angle
  • Figure 9 is a specific embodiment of the adjustable backrest folding chair provided by the present invention
  • Fig. 10 is a side view of specific embodiment four of the folding chair with adjustable backrest provided by the present invention
  • Fig. 11 is a side view of specific embodiment five of the folding chair with adjustable backrest provided by the present invention
  • 12 is a schematic diagram of the structure of the telescopic locking structure
  • Figure 13 is a schematic diagram of the structure of the limit block.
  • the backrest adjustable folding chair provided by this embodiment includes: a bracket body hingedly connected by a plurality of connecting pipes, a rear support leg 10, a front support leg 11, and an angle adjustment mechanism 01;
  • the two ends of the angle adjusting mechanism 01 are respectively connected to the two connecting tubes in the bracket body, so that the angle adjusting mechanism 01 and the two connecting tubes in the bracket body form a variable triangle, and the back of the folding chair can be adjusted by adjusting the triangle. Rely on the angle.
  • the rear support leg 10 and the front support leg 11 are rotated to a state in contact with the ground to support the bracket body, so that the bracket body is in a stable state; the angle adjustment mechanism 01 is connected to two of the bracket body The angle or side length of the triangle formed by the tube to change the backrest angle of the folding chair.
  • bracket body mentioned in this specific embodiment is the part located on the upper part of the front support leg 11 and the rear support leg 10. It may only include the backrest tube 1 and the seat tube 7, or it may include the backrest tube. 1.
  • the backrest adjustable folding chair provided by the present invention can realize the stepless adjustment of the backrest angle, and only needs to control the angle adjustment mechanism 01 during the adjustment process, which simplifies the adjustment process operation.
  • the bracket body can include a back tube 1 and a seat tube 7 hingedly connected to the back tube 1;
  • One end of the angle adjustment mechanism 01 is connected to the back tube 1 and the other end is connected to the seat tube 7, so that the angle adjustment mechanism 01 and the back tube 1 and the seat tube 7 form an angle-adjustable triangle.
  • angle-adjustable triangle mentioned here means that the angle of each inner angle and the side length of each side of the triangle formed by the back tube 1, the seat tube 7 and the angle adjustment mechanism 01 can be changed.
  • one of the backrest tube 1 and the seat tube 7 can be hingedly connected to one end of the angle adjustment mechanism 01, and the other can be slidably connected to the other end of the angle adjustment mechanism 01;
  • the position of the angle adjusting mechanism 01 relative to the back tube 1 or the seat tube 7 is adjusted to make the back tube 1 rotate relative to the seat tube 7.
  • angle adjustment mechanism 01 can be slidably arranged on the back tube 1 or the seat tube 7, which means that the angle adjustment mechanism 01 is slidably and fixedly arranged on the back tube 1 and Sit on one of 7.
  • the angle adjustment mechanism 01 can be provided with related adjustment components.
  • the angle adjustment mechanism 01 can slide relative to the back tube 1 or the seat tube 7.
  • the angle adjustment mechanism 01 It is fixed and locked relative to the backrest tube 1 or the seat tube 7.
  • the angle adjustment mechanism 01 can also be a telescopic structure, and one end of the angle adjustment mechanism 01 is connected to the back tube 1 and the other end is connected to the seat tube 7, and the telescopic structure is extended or shortened to make The backrest tube 1 rotates relative to the seat tube 7.
  • the two ends of the angle adjustment mechanism 01 can be hingedly connected to the back tube 1 and the seat tube 7, or one end of the angle adjustment mechanism 01 and the back tube One of 1 or the seat tube 7 is hingedly connected, and the other end of the angle adjustment mechanism 01 is slidably connected to the other of the backing tube 1 or the seat tube 7, which is determined according to the actual situation, and will not be repeated here.
  • the folding chair with adjustable backrest includes: backrest tube 1, seat tube 7, armrest tube 2, armrest support tube 9, rear support leg 10, front support leg 11, angle adjustment mechanism 01, seat tube 7
  • One end of the armrest tube 1 is hingedly connected to the backrest tube 1, and the other end is hingedly connected to the armrest support tube 9
  • one end of the armrest tube 2 is hingedly connected to the backrest tube 1 and the other end is hingedly connected to the armrest support tube 9
  • one end of the angle adjustment mechanism 01 is connected One end of the armrest tube 2, the armrest support tube 9, the backrest tube 1 and the seat tube 7, and the other end is connected to the other of the armrest tube 2, the armrest support tube 9, the backrest tube 1 and the seat tube 7,
  • the back tube 1 is rotated relative to the seat tube 7 by adjusting the triangle.
  • the angle adjustment mechanism 01 can be a rod-shaped structure. During the installation process, the two ends of the angle adjustment mechanism 01 can be connected to the armrest tube 2, the armrest support tube 9, the backrest tube 1 and the seat tube 7
  • the angle adjustment mechanism 01 can be connected to the seat tube 7 at one end and the armrest tube 2 at the other end, or the angle adjustment mechanism 01 can be connected to the backrest tube 1 at one end and the armrest tube support tube 9 at the other end.
  • the adjustment mechanism 01 enables the backrest tube 1, the armrest tube 2, the armrest support tube 9, and the seat tube 7 to have a variable triangle structure in the parallelogram structure.
  • the backrest adjustable folding chair provided by the present invention can realize the stepless adjustment of the rotation angle of the backrest tube 1 relative to the seat tube 7, and only needs to control the angle adjustment mechanism 01 during the adjustment process to make the adjustment process Simplified operation.
  • one end of the angle adjustment mechanism 01 can be slidably connected to the armrest tube 2, and the other end is hingedly connected to the back tube 1 or the seat tube 7, and the position of the angle adjustment mechanism 01 relative to the armrest tube 2 can be adjusted.
  • the backrest tube 1 rotate relative to the seat tube 7.
  • the angle adjustment mechanism 01 is slidably connected to the armrest tube 2 to facilitate adjustment and avoid interference from other parts.
  • the angle adjustment mechanism 01 can be slid relative to the armrest tube 2, so that the backrest tube 1 rotates relative to the seat tube 7, and when the backrest tube 1 rotates to the right After the position, the angle adjusting mechanism 01 is fixed relative to the armrest tube 2 so that the backrest tube 1 is firmly set.
  • the angle adjustment mechanism 01 can be a telescopic structure, and one end of the angle adjustment mechanism 01 is connected to the armrest tube, and the other end is hingedly connected to the back tube or the seat tube.
  • the telescopic structure is extended or shortened to Rotate the backrest tube relative to the seat tube.
  • the rear support leg 10 and the front support leg 11 rotate the rear support leg 10 and the front support leg 11 to a state in contact with the ground to support the seat tube 7 so that the seat tube 7 is in a stable state; adjust the backrest tube 1, the armrest tube 2, the telescopic
  • the structure makes the backrest tube 1, the armrest tube 2, and the angle adjustment mechanism 01 form a variable triangular structure.
  • the backrest tube 1, the armrest tube 2, the armrest support tube 9, and the seat tube 7 form a parallelogram structure.
  • the angle adjustment mechanism 01 needs to be adjusted to shorten the length of the angle adjustment mechanism 01. At this time, the back rests on the tube 1, the armrest tube 2, the armrest support tube 9, and the seat tube 7 in the parallelogram.
  • the backrest tube 1, the armrest support tube 9 rotates backwards relative to the seat tube 7.
  • the shortening of the angle adjustment mechanism 01 is stopped, so that the folding chair is in a stable state;
  • the telescopic structure needs to be adjusted to extend the length of the angle adjustment mechanism 01.
  • the backrest tube 1, the armrest tube 2, the armrest support tube 9, and the seat tube 7 are composed of the parallelogram middle backrest tube 1, the armrest The support tube 9 rotates forward relative to the seat tube 7, and when it rotates to a desired angle, the extension of the angle adjusting mechanism 01 is stopped, so that the folding chair is in a stable state.
  • the angle adjustment mechanism 01 can be slidable and fixedly arranged relative to the armrest tube.
  • the telescopic structure in the process of adjusting the rotation angle of the back tube 1 relative to the seat tube 7, can move relative to the armrest tube 2 toward the back tube 1, or relative to the armrest tube 2.
  • the direction of movement close to the armrest support tube 9 is determined according to the actual situation.
  • the backrest adjustable folding chair provided by the present invention can realize the stepless adjustment of the rotation angle of the backrest tube 1 relative to the seat tube 7, and only needs to control the expansion and contraction of the telescopic structure during the adjustment process, so that the adjustment process Simplified operation.
  • an end of the seat tube 7 close to the back tube 1 is provided with a connector 6, and the back tube 1 is rotatably connected to the connector 6.
  • the telescopic structure can include an outer telescopic tube 3, an inner telescopic tube 5, and a telescopic locking structure 4 for fixing or moving the inner telescopic tube 5 relative to the outer telescopic tube 3; the outer telescopic tube 3 One end of the tube is slidably connected with a connecting tube in the bracket body, and the other end is sleeved on the outer circumference of the inner telescopic tube 5, and the inner telescopic tube 5 is hingedly arranged on the other connecting tube in the bracket body.
  • the inner telescopic tube 5 can be hinged to the end of the back tube 1 or the seat tube 7, or can be hinged to the non-end position of the back tube 1 or the seat tube 7, which is specifically determined according to actual conditions.
  • the telescopic locking structure 4 makes the inner telescopic tube 5 and the outer telescopic tube 3 in a locked state, the relative positions of the two are fixed.
  • the telescopic locking structure 4 makes the inner telescopic tube 5 and the outer telescopic tube
  • the inner telescopic tube 5 can move relative to the outer telescopic tube 3.
  • it may further include a stop block 8 connected with the outer telescopic tube 3, and the stop block 8 is provided with a cylindrical connecting portion for connecting with the outer telescopic tube 3 and a sliding connecting portion for sliding connection with the armrest tube 2 ;
  • the outer telescopic tube 3 is connected to the cylindrical connecting portion.
  • the cylindrical connecting part of the limiting block 8 is sleeved on the outer peripheral part of the outer telescopic tube 3, and the sliding connecting part of the limiting tube is slidably connected to the armrest tube 2.
  • the telescopic locking structure 4 can be set as a one-way locking structure Only when the backrest tube 1 rotates backward relative to the seat tube 7, the telescopic locking structure 4 needs to be set to the unlocked state.
  • the backrest tube 1 rotates forward relative to the seat tube 7, regardless of the retractable lock Whether the stop structure 4 is in the locked state or the unlocked state, the back tube 1 can be rotated forward relative to the seat tube 7, and only the friction between the inner telescopic tube 5 and the outer telescopic tube 3 needs to be overcome.
  • the telescopic locking structure 4 is provided with a trigger for controlling the relative locking or unlocking of the inner telescopic tube 5 and the outer telescopic tube 3.
  • the trigger is raised, and the telescopic locking structure 4 In the unlocked state, pull down the trigger, and the telescopic locking structure 4 is in the locked state.
  • the telescopic locking structure 4 can be provided for setting the backrest tube 1 relative to the seat tube 1 A cushioning device that provides resilience when the tube 7 rotates forward, or provides a cushioning device when the backrest tube 1 rotates backward relative to the seat tube 7.
  • the buffer device is a spring.
  • the backrest tube 1 needs to overcome the elastic force of the spring to avoid the rapid rotation of the backrest tube 1 and cause danger; when adjusting the backrest forward During the process of leaning on the tube 1, the spring can provide a moving pulling force to help overcome the friction between the inner telescopic tube 5 and the outer telescopic tube 3.
  • the number of the armrest tube 2, the seat tube 7, the armrest support tube 9 and the telescopic structure can be two, and the armrest tube 2, the seat tube 7, the armrest support tube 9 and the telescopic structure are all symmetrical.
  • the armrest tube 2, the seat tube 7, the armrest support tube 9 and the telescopic structure are all symmetrical.
  • the backrest tube 1 has an inverted U-shaped structure, and both ends of the U-shaped structure are hinged to the seat tube 7.
  • feet may be provided at the ends of the rear support leg 10 and the front support leg 11.
  • the rear support leg 10 and the front support leg 11 All are connected with the ground foot rotation.
  • the rear support leg 10 and the front support leg 11 are both adjustable in length.
  • the backrest tube 1, the seat tube 7, the armrest tube 2, the armrest support tube 9, the inner telescopic tube 5, the outer telescopic tube 3, the rear support leg 10, and the front support leg 11 mentioned in this application document are all hollow. Round tube structure.

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  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

一种靠背可调折叠椅，包括：由若干连接管铰接连接的支架本体、后支撑腿(10)、前支撑腿(11)以及角度调节机构(01)，角度调节机构(01)的两端分别连接于支架本体中的两根连接管，以使角度调节机构(01)与支架本体中的两根连接管形成可变的三角形，通过调节三角形，以调节折叠椅的背靠角度。该靠背可调折叠椅可以实现折叠椅靠背角度的无级调节，并且调节的过程中只需对角度调节机构(01)进行调节，使调节过程操作简化。

Description

一种靠背可调折叠椅
本申请要求于2019年12月13日提交中国专利局、申请号为201911283707.7、发明名称为“一种靠背可调折叠椅”的中国专利申请的优先权，以及于2019年12月13日提交中国专利局、申请号为201922238267.5、申请名称为“一种靠背可调折叠椅”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及折叠椅技术领域，更具体地说，涉及一种靠背可调折叠椅。
背景技术
市面上的折叠椅分为靠背角度可调节和不可调节两种，靠背角度的调节通过靠背及坐管间的角度调节器实现，或通过改变扶手相对于前脚管的档位来调节实现。
现有技术中，通过角度调节器调节靠背角度的方案一般操作较繁琐，坐在椅子上操作不方便；通过扶手档位调节一般档位位置有限，导致靠背只能调节有限的几个角度，不能够满足用户的需求。
综上所述，如何提供一种调节过程方便的靠背可调折叠椅，是目前本领域技术人员亟待解决的问题。
发明内容
有鉴于此，本发明的目的是提供一种靠背可调折叠椅，可以实现折叠椅靠背的快速调节，并使调节过程操作方便。
为了实现上述目的，本发明提供如下技术方案：
一种靠背可调折叠椅，包括：由若干连接管铰接连接的支架本体、后支撑腿、前支撑腿以及角度调节机构，
所述角度调节机构的两端分别连接于所述支架本体中的两根所述连接管，以使所述角度调节机构与所述支架本体中的两根连接管形成可变的三 角形，通过调节所述三角形，以调节所述折叠椅的背靠角度。
优选的，所述支架本体包括背靠管和与所述背靠管铰接连接的坐管；
所述角度调节机构的一端连接于所述背靠管、另一端连接于所述坐管，以使所述角度调节机构与所述背靠管、所述坐管形成角度可调的三角形。
优选的，所述背靠管和所述坐管中的一者与所述角度调节机构的一端铰接连接、另一者与所述角度调节机构的另一端滑动连接；
调节所述角度调节机构相对于所述背靠管或坐管的位置，以使所述背靠管相对于所述坐管转动。
优选的，所述角度调节机构为伸缩结构，且所述角度调节机构的一端连接于所述背靠管，另一端连接于所述坐管，所述伸缩结构伸长或缩短，以使所述背靠管相对于所述坐管转动。
优选的，所述支架本体包括背靠管、坐管、扶手管和扶手支撑管，所述坐管的一端与所述背靠管铰接连接，另一端与所述扶手支撑管铰接连接；所述扶手管的一端与所述背靠管铰接连接，另一端与所述扶手支撑管铰接连接；
所述角度调节机构的一端连接于所述扶手管、所述扶手支撑管、所述背靠管和所述坐管中的一者，另一端连接于所述扶手管、所述扶手支撑管、所述背靠管和所述坐管中的另一者，以使所述扶手管、所述扶手支撑管、所述背靠管和所述坐管组成的平行四边形中存在可变的三角形，通过调节所述三角形，使所述背靠管相对于所述坐管转动。
优选的，所述角度调节机构的一端滑动连接于所述扶手管，另一端铰接连接于所述背靠管或所述坐管，调节所述角度调节机构相对于所述扶手管的位置，以使使所述背靠管相对于所述坐管转动。
优选的，所述角度调节机构为伸缩结构，且所述角度调节机构的一端连接于所述扶手管，另一端铰接连接于所述背靠管或所述坐管，所述伸缩结构伸长或缩短，以使所述背靠管相对于所述坐管转动。
优选的，所述角度调节机构相对于所述扶手管可滑动且可固定设置。
优选的，所述伸缩结构包括外伸缩管、内伸缩管以及用于使所述内伸缩管相对于所述外伸缩管固定或移动的伸缩锁止结构；
所述外伸缩管的一端与所述支架本体中的一个连接管滑动连接，另一端套装于所述内伸缩管的外周部，所述内伸缩管铰接设置于所述支架本体中的另一个连接管。
优选的，还包括与所述外伸缩管连接的限位块，所述限位块设置有用于与所述外伸缩管连接的筒状连接部以及用于与所述扶手管滑动连接的滑动连接部；所述外伸缩管连接于所述筒状连接部内。
优选的，所述伸缩锁止结构为单向锁止结构，以避免所述背靠管相对于所述坐管向后转动。
优选的，所述伸缩锁止结构设置有用于控制所述内伸缩管与所述外伸缩管相对锁止或解除的扳扣。
优选的，所述伸缩锁止结构内设置有用于在所述背靠管相对于所述坐管向前转动时提供回弹力、或在所述背靠管相对于所述坐管向后转动时提供缓冲的缓冲装置。
优选的，所述缓冲装置为弹簧。
优选的，所述扶手管、所述坐管、所述扶手支撑管和所述伸缩结构的数量均为两个，且所述扶手管、所述坐管、所述扶手支撑管和所述伸缩结构均对称设置于所述背靠管的左右两侧。
优选的，所述后支撑腿和所述前支撑腿的端部均设置有地脚，所述后支撑腿和所述前支撑腿均与所述地脚转动连接。
本发明提供的靠背可调折叠椅，包括：由若干连接管铰接连接的支架本体、后支撑腿、前支撑腿以及角度调节机构，
角度调节机构的两端分别连接于支架本体中的两根连接管，以使角度调节机构与支架本体中的两根连接管形成可变的三角形，通过调节三角形，以调节折叠椅的背靠角度。
在使用的过程中，将后支撑腿与前支撑腿转动至与地面接触的状态，对支架本体形成支撑，使支架本体处于稳定状态；调整角度调节机构与支架本体中的两根连接管形成的三角形的角度或边长，以使折叠椅的背靠角度发生改变。
相比于现有技术，本发明提供的靠背可调折叠椅可以实现背靠角度的 无级调节，并且调节的过程中只需控制角度调节机构，使调节过程操作简化。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明所提供的靠背可调折叠椅的具体实施例一的轴测图；
图2为图1中靠背可调折叠椅的另一观测角度的轴测图；
图3为图1中靠背可调折叠椅的背靠管位于第一角度的侧视图；
图4为图1中靠背可调折叠椅的背靠管位于第二角度的侧视图；
图5为图1中靠背可调折叠椅的背靠管位于第三角度的侧视图；
图6为图1中靠背可调折叠椅折叠状态的侧视图；
图7为本发明所提供的靠背可调折叠椅的具体实施例二的侧视图；
图8为图9中的靠背可调折叠椅的背靠管位于另一角度的侧视图；
图9为本发明所提供的靠背可调折叠椅的具体实施例三的侧视图；
图10为本发明所提供的靠背可调折叠椅的具体实施例四的侧视图；
图11为本发明所提供的靠背可调折叠椅的具体实施例五的侧视图；
图12为伸缩锁止结构的结构示意图；
图13为限位块的结构示意图。
图1-13中：
01为角度调节机构、1为背靠管、2为扶手管、3为外伸缩管、4为伸缩锁止结构、5为内伸缩管、6为连接件、7为坐管、8为限位块、9为扶手支撑管、10为后支撑腿、11为前支撑腿。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进 行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的核心是提供一种靠背可调折叠椅，可以使靠背的转动角度实现无级调节，并且调节过程简单方便。
请参考图1-10，图1为本发明所提供的靠背可调折叠椅的具体实施例一的轴测图；图2为图1中靠背可调折叠椅的另一观测角度的轴测图；图3为图1中靠背可调折叠椅的背靠管位于第一角度的侧视图；图4为图1中靠背可调折叠椅的背靠管位于第二角度的侧视图；图5为图1中靠背可调折叠椅的背靠管位于第三角度的侧视图；图6为图1中靠背可调折叠椅折叠状态的侧视图；图7为本发明所提供的靠背可调折叠椅的具体实施例二的侧视图；图8为图9中的靠背可调折叠椅的背靠管位于另一角度的侧视图；图9为本发明所提供的靠背可调折叠椅的具体实施例三的侧视图；图10为本发明所提供的靠背可调折叠椅的具体实施例四的侧视图；图11为本发明所提供的靠背可调折叠椅的具体实施例五的侧视图；图12为伸缩锁止结构的结构示意图；图13为限位块的结构示意图。
本具体实施例提供的靠背可调折叠椅，包括：由若干连接管铰接连接的支架本体、后支撑腿10、前支撑腿11以及角度调节机构01；
角度调节机构01的两端分别连接于支架本体中的两根连接管，以使角度调节机构01与支架本体中的两根连接管形成可变的三角形，通过调节三角形，以调节折叠椅的背靠角度。
在使用的过程中，将后支撑腿10与前支撑腿11转动至与地面接触的状态，对支架本体形成支撑，使支架本体处于稳定状态；调整角度调节机构01与支架本体中的两根连接管形成的三角形的角度或边长，以使折叠椅的背靠角度发生改变。
需要进行说明的是，本具体实施例中提到的支架本体为位于前支撑腿11和后支撑腿10上部的部分，可以只包含背靠管1和坐管7，也可以是包含背靠管1、坐管7、扶手管2以及扶手支撑管9，或者还可以包含其他结 构，具体根据实际情况确定，在此不做赘述。
相比于现有技术，本发明提供的靠背可调折叠椅可以实现背靠角度的无级调节，并且调节的过程中只需控制角度调节机构01，使调节过程操作简化。
在上述实施例的基础上，为了使折叠椅的结构更加简单，可以使支架本体包括背靠管1和与背靠管1铰接连接的坐管7；
角度调节机构01的一端连接于背靠管1、另一端连接于坐管7，以使角度调节机构01与背靠管1、坐管7形成角度可调的三角形。
需要进行说明的是，此处所说的角度可调的三角形，是指背靠管1、坐管7以及角度调节机构01所组成的三角形的各个内角的角度以及各个边的边长可以改变。
在上述实施例的基础上，可以使背靠管1和坐管7中的一者与角度调节机构01的一端铰接连接、另一者与角度调节机构01的另一端滑动连接；
调节角度调节机构01相对于背靠管1或坐管7的位置，以使背靠管1相对于坐管7转动。
需要进行说明的是，此处可以使角度调节机构01的滑动设置于背靠管1或坐管7中的一者，是指角度调节机构01可滑动且可固定的设置于背靠管1与坐管7中的一者。
优选的，可以在角度调节机构01设置相关调节部件，当处于解锁状态下，角度调节机构01可以相对于背靠管1或坐管7滑动，当调节部件处于锁止状态下，角度调节机构01相对于背靠管1或坐管7固定锁止。
在上述实施例的基础上，也可以使角度调节机构01为伸缩结构，且角度调节机构01的一端连接于背靠管1，另一端连接于坐管7，伸缩结构伸长或缩短，以使背靠管1相对于坐管7转动。
需要进行说明的是，当角度调节机构01为伸缩结构时，角度调节机构01的两端可以分别铰接连接于背靠管1和坐管7，也可以使角度调节机构01的一端与背靠管1或坐管7中的一者铰接连接，角度调节机构01的另一端与背靠管1或坐管7中的另一者滑动连接，具体根据实际情况确定，在此不做赘述。
本具体实施例提供的靠背可调折叠椅，包括：背靠管1、坐管7、扶手管2、扶手支撑管9、后支撑腿10、前支撑腿11以及角度调节机构01，坐管7的一端与背靠管1铰接连接，另一端与扶手支撑管9铰接连接；扶手管2的一端与背靠管1铰接连接，另一端与扶手支撑管9铰接连接；角度调节机构01的一端连接于扶手管2、扶手支撑管9、背靠管1和坐管7中的一者，另一端连接于扶手管2、扶手支撑管9、背靠管1和坐管7中的另一者，以使扶手管2、扶手支撑管9、背靠管1和坐管7组成的平行四边形中存在可变的三角形，通过调节三角形，使背靠管1相对于坐管7转动。
需要进行说明的是，角度调节机构01可以是杆状结构，在设置的过程中，角度调节机构01的两端可以连接于扶手管2、扶手支撑管9、背靠管1和坐管7四者中的任意两者，只需使扶手管2、扶手支撑管9、背靠管1和坐管7组成的四边形中存在可变的三角形即可。例如：角度调节机构01可以一端连接于坐管7，另一端连接于扶手管2，或角度调节机构01可以一端连接于背靠管1，另一端连接于扶手管支撑管9等。
在使用的过程中，将后支撑腿10与前支撑腿11转动至与地面接触的状态，对坐管7形成支撑，使坐管7处于稳定状态；调整背靠管1、扶手管2、角度调节机构01，使背靠管1、扶手管2、扶手支撑管9、坐管7组成的平行四边形结构中存在可变的三角形结构，当需要使靠背管1相对于坐管7向前或向后转动时，需要调节角度调节机构01，使背靠管1相对于坐管7转动，转动至合适位置之后，调节角度调节机构01使三角形处于稳固状态，以使背靠管1相对于坐管7固定于合适位置，使折叠椅处于稳定状态。
相比于现有技术，本发明提供的靠背可调折叠椅可以实现背靠管1相对于坐管7转动角度的无级调节，并且调节的过程中只需控制角度调节机构01，使调节过程操作简化。
在上述实施例的基础上，可以使角度调节机构01的一端滑动连接于扶手管2，另一端铰接连接于背靠管1或坐管7，调节角度调节机构01相对于扶手管2的位置，以使背靠管1相对于坐管7转动。
角度调节机构01滑动连接于扶手管2，方便调节，避免其他零部件的 干扰。
在使用的过程中，将后支撑腿10与前支撑腿11转动至与地面接触的状态，对坐管7形成支撑，使坐管7处于稳定状态；调整背靠管1、扶手管2、伸缩结构，使背靠管1、扶手管2、角度调节机构01形成可变的三角形结构，背靠管1、扶手管2、扶手支撑管9、坐管7组成的平行四边形结构，当需要将背靠管1相对于坐管7向前或向后转动时，可以使角度调节机构01相对于扶手管2滑动，以使背靠管1相对于坐管7转动，当背靠管1转动至合适位置之后，使角度调节机构01相对于扶手管2固定，以使背靠管1稳固设置。
在上述实施例的基础上，可以使角度调节机构01为伸缩结构，且角度调节机构01的一端连接于扶手管，另一端铰接连接于背靠管或坐管，伸缩结构伸长或缩短，以使背靠管相对于坐管转动。
在使用的过程中，将后支撑腿10与前支撑腿11转动至与地面接触的状态，对坐管7形成支撑，使坐管7处于稳定状态；调整背靠管1、扶手管2、伸缩结构，使背靠管1、扶手管2、角度调节机构01形成可变的三角形结构，背靠管1、扶手管2、扶手支撑管9、坐管7组成的平行四边形结构，当需要使靠背相对于坐管7向后转动时，需要调节角度调节机构01，使角度调节机构01的长度缩短，此时背靠管1、扶手管2、扶手支撑管9、坐管7组成的平行四边形中背靠管1、扶手支撑管9相对于坐管7向后转动，当转动至所需角度之后，停止角度调节机构01的缩短，使折叠椅处于稳定状态；当需要使靠背相对于坐管7向前转动时，需要调节伸缩结构，使角度调节机构01的长度伸长，此时背靠管1、扶手管2、扶手支撑管9、坐管7组成的平行四边形中背靠管1、扶手支撑管9相对于坐管7向前转动，当转动至所需角度之后，停止角度调节机构01的伸长，使折叠椅处于稳定状态。
在上述实施例的基础上，为了使折叠椅能够折叠，可以使角度调节机构01相对于扶手管可滑动且可固定设置。
需要进行说明的是，在调节背靠管1相对于坐管7的转动角度的过程中，伸缩结构可以相对于扶手管2向靠近背靠管1的方向移动，也可以相 对于扶手管2向靠近扶手支撑管9的方向移动，具体根据实际情况确定。
相比于现有技术，本发明提供的靠背可调折叠椅可以实现背靠管1相对于坐管7转动角度的无级调节，并且调节的过程中只需控制伸缩结构的伸缩，使调节过程操作简化。
优选的，坐管7靠近背靠管1的一端设置有连接件6，背靠管1转动连接于连接件6。
在上述实施例的基础上，可以使伸缩结构包括外伸缩管3、内伸缩管5以及用于使内伸缩管5相对于外伸缩管3固定或移动的伸缩锁止结构4；外伸缩管3的一端与支架本体中的一个连接管滑动连接，另一端套装于内伸缩管5的外周部，内伸缩管5铰接设置于支架本体中的另一个连接管。
内伸缩管5可以铰接于背靠管1或坐管7的端部，也可以铰接于背靠管1或坐管7的非端部位置，具体根据实际情况确定。
在使用的过程中，当伸缩锁止结构4使内伸缩管5与外伸缩管3处于锁止状态时，两者的相对位置固定，当伸缩锁止结构4使内伸缩管5与外伸缩管3处于解锁状态时，内伸缩管5可相对于外伸缩管3移动。
为了便于安装，可以还包括与外伸缩管3连接的限位块8，限位块8设置有用于与外伸缩管3连接的筒状连接部以及用于与扶手管2滑动连接的滑动连接部；外伸缩管3连接于筒状连接部内。
如图8所示，限位块8的筒状连接部套装于外伸缩管3的外周部，限位管的滑动连接部滑动连接于扶手管2。
在上述实施例的基础上，为了避免在背靠管1相对于坐管7转动的过程中需一直控制伸缩锁止结构4处于解锁状态，可以将伸缩锁止结构4设置为单向锁止结构，只有在背靠管1相对于坐管7向后转动的过程中，才需要将伸缩锁止结构4设置为解锁状态，当背靠管1相对于坐管7向前转动时，不论伸缩锁止结构4处于锁止状态还是解锁状态，背靠管1均可以相对于坐管7向前转动，只需克服内伸缩管5与外伸缩管3之间的摩擦力即可。
如图7所示，伸缩锁止结构4设置有用于控制内伸缩管5与外伸缩管3相对锁止或解除的扳扣，在使用的过程中，将扳扣扳起，伸缩锁止结构4 处于解锁状态，将扳扣扣下，伸缩锁止结构4处于锁止状态。
在上述实施例的基础上，为了避免调节过程中，背靠管1相对于坐管7向后转动的速度过快，可以在伸缩锁止结构4中设置用于在背靠管1相对于坐管7向前转动时提供回弹力、或在背靠管1相对于坐管7向后转动时提供缓冲的缓冲装置。
优选的，缓冲装置为弹簧。
在使用的过程中，当人坐在椅子上，向后调节背靠管1的过程中，背靠管1需克服弹簧的弹力，避免背靠管1快速转动，发生危险；当向前调节背靠管1的过程中，弹簧可以提供移动的拉力，帮助克服内伸缩管5与外伸缩管3之间的摩擦力。
在上述实施例的基础上，可以使扶手管2、坐管7、扶手支撑管9和伸缩结构的数量均为两个，且扶手管2、坐管7、扶手支撑管9和伸缩结构均对称设置于背靠管1的左右两侧。
优选的，背靠管1为倒置的U形结构，且U形结构的两端部均与坐管7铰接。
在上述实施例的基础上，为了使本发明提供的靠背可调折叠椅更加稳固，可以在后支撑腿10和前支撑腿11的端部均设置地脚，后支撑腿10和前支撑腿11均与地脚转动连接。
优选的，后支撑腿10与前支撑腿11均为长度可调的结构。
优选的，本申请文件中提到的背靠管1、坐管7、扶手管2、扶手支撑管9、内伸缩管5、外伸缩管3、后支撑腿10和前支撑腿11均为空心圆管结构。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。本发明所提供的所有实施例的任意组合方式均在此发明的保护范围内，在此不做赘述。
以上对本发明所提供的靠背可调折叠椅进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域 的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (16)

  1. 一种靠背可调折叠椅，其特征在于，包括：由若干连接管铰接连接的支架本体、后支撑腿(10)、前支撑腿(11)以及角度调节机构(01)，
    所述角度调节机构(01)的两端分别连接于所述支架本体中的两根所述连接管，以使所述角度调节机构(01)与所述支架本体中的两根连接管形成可变的三角形，通过调节所述三角形，以调节所述折叠椅的背靠角度。
  2. 根据权利要求1所述的靠背可调折叠椅，其特征在于，所述支架本体包括背靠管(1)和与所述背靠管(1)铰接连接的坐管(7)；
    所述角度调节机构(01)的一端连接于所述背靠管(1)、另一端连接于所述坐管(7)，以使所述角度调节机构(01)与所述背靠管(1)、所述坐管(7)形成角度可调的三角形。
  3. 根据权利要求2所述的靠背可调折叠椅，其特征在于，所述背靠管(1)和所述坐管(7)中的一者与所述角度调节机构(01)的一端铰接连接、另一者与所述角度调节机构(01)的另一端滑动连接；
    调节所述角度调节机构(01)相对于所述背靠管(1)或坐管(7)的位置，以使所述背靠管(1)相对于所述坐管(7)转动。
  4. 根据权利要求2所述的靠背可调折叠椅，其特征在于，所述角度调节机构(01)为伸缩结构，且所述角度调节机构(01)的一端连接于所述背靠管(1)，另一端连接于所述坐管(7)，所述伸缩结构伸长或缩短，以使所述背靠管(1)相对于所述坐管(7)转动。
  5. 根据权利要求1所述的靠背可调折叠椅，其特征在于，所述支架本体包括背靠管(1)、坐管(7)、扶手管(2)和扶手支撑管(9)，所述坐管(7)的一端与所述背靠管(1)铰接连接，另一端与所述扶手支撑管(9)铰接连接；所述扶手管(2)的一端与所述背靠管(1)铰接连接，另一端与所述扶手支撑管(9)铰接连接；
    所述角度调节机构(01)的一端连接于所述扶手管(2)、所述扶手支撑管(9)、所述背靠管(1)和所述坐管(7)中的一者，另一端连接于所述扶手管(2)、所述扶手支撑管(9)、所述背靠管(1)和所述坐管(7)中的另一者，以使所述扶手管(2)、所述扶手支撑管(9)、所述背靠管(1) 和所述坐管(7)组成的平行四边形中存在可变的三角形，通过调节所述三角形，使所述背靠管(1)相对于所述坐管(7)转动。
  6. 根据权利要求5所述的靠背可调折叠椅，其特征在于，所述角度调节机构(01)的一端滑动连接于所述扶手管(2)，另一端铰接连接于所述背靠管(1)或所述坐管(7)，调节所述角度调节机构(01)相对于所述扶手管(2)的位置，以使所述背靠管(1)相对于所述坐管(7)转动。
  7. 根据权利要求5所述的靠背可调折叠椅，其特征在于，所述角度调节机构(01)为伸缩结构，且所述角度调节机构(01)的一端连接于所述扶手管(2)，另一端连接于所述背靠管(1)或所述坐管(7)，所述伸缩结构伸长或缩短，以使所述背靠管(1)相对于所述坐管(7)转动。
  8. 根据权利要求7所述的靠背可调折叠椅，其特征在于，所述角度调节机构(01)相对于所述扶手管(2)可滑动且可固定设置。
  9. 根据权利要求4或7-8任一项所述的靠背可调折叠椅，其特征在于，所述伸缩结构包括外伸缩管(3)、内伸缩管(5)以及用于使所述内伸缩管(5)相对于所述外伸缩管(3)固定或移动的伸缩锁止结构(4)；
    所述外伸缩管(3)的一端与所述支架本体中的一个连接管滑动连接，另一端套装于所述内伸缩管(5)的外周部，所述内伸缩管(5)铰接设置于所述支架本体中的另一个连接管。
  10. 根据权利要求9所述的靠背可调折叠椅，其特征在于，还包括与所述外伸缩管(3)连接的限位块(8)，所述限位块(8)设置有用于与所述外伸缩管(3)连接的筒状连接部以及用于与所述扶手管(2)滑动连接的滑动连接部；所述外伸缩管(3)连接于所述筒状连接部内。
  11. 根据权利要求9所述的靠背可调折叠椅，其特征在于，所述伸缩锁止结构(4)为单向锁止结构，以避免所述背靠管(1)相对于所述坐管(7)向后转动。
  12. 根据权利要求11所述的靠背可调折叠椅，其特征在于，所述伸缩锁止结构(4)设置有用于控制所述内伸缩管(5)与所述外伸缩管(3)相对锁止或解除的扳扣。
  13. 根据权利要求9所述的靠背可调折叠椅，其特征在于，所述伸缩 锁止结构(4)内设置有用于在所述背靠管(1)相对于所述坐管(7)向前转动时提供回弹力、或在所述背靠管(1)相对于所述坐管(7)向后转动时提供缓冲的缓冲装置。
  14. 根据权利要求13所述的靠背可调折叠椅，其特征在于，所述缓冲装置为弹簧。
  15. 根据权利要求5所述的靠背可调折叠椅，其特征在于，所述扶手管(2)、所述坐管(7)、所述扶手支撑管(9)和所述伸缩结构的数量均为两个，且所述扶手管(2)、所述坐管(7)、所述扶手支撑管(9)和所述伸缩结构均对称设置于所述背靠管(1)的左右两侧。
  16. 根据权利要求1-3或5-6任一项所述的靠背可调折叠椅，其特征在于，所述后支撑腿(10)和所述前支撑腿(11)的端部均设置有地脚，所述后支撑腿(10)和所述前支撑腿(11)均与所述地脚转动连接。
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