WO2023077559A1 - 椅子以及靠背 - Google Patents

椅子以及靠背 Download PDF

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Publication number
WO2023077559A1
WO2023077559A1 PCT/CN2021/131099 CN2021131099W WO2023077559A1 WO 2023077559 A1 WO2023077559 A1 WO 2023077559A1 CN 2021131099 W CN2021131099 W CN 2021131099W WO 2023077559 A1 WO2023077559 A1 WO 2023077559A1
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WO
WIPO (PCT)
Prior art keywords
backrest
stop
sliding
limit plate
base
Prior art date
Application number
PCT/CN2021/131099
Other languages
English (en)
French (fr)
Inventor
孙明亮
Original Assignee
浙江润大柯泓家具有限公司
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Application filed by 浙江润大柯泓家具有限公司 filed Critical 浙江润大柯泓家具有限公司
Publication of WO2023077559A1 publication Critical patent/WO2023077559A1/zh

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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
    • 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
    • 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
    • A47C7/40—Support for the head or the back for the back

Definitions

  • the invention relates to a chair and a backrest, belonging to the field of rest equipment.
  • the chair In one of the functions pursued by the chair, it is necessary to be able to adjust the inclination angle of the backrest of the chair, thereby adjusting the back support angle ⁇ the angle between the support force of the backrest to the back of the human body and the horizontal plane is called the back support angle, as shown in Figure 8 ⁇ , allowing users to obtain different back support angle requirements.
  • the required back support angle should be small, and the inclination angle of the backrest should be small.
  • the required back support angle is larger, and the inclination angle of the backrest is larger, so that the user is easy to relax.
  • the Chinese patent with the application number CN202021018964.6 discloses a chair with a waist adjustment device, which includes a chair body and a backrest rotatably mounted on the chair body.
  • the same rotating rod is installed on the side inner wall, and the backrest is fixedly sleeved on the rotating rod.
  • the fixed sleeve on the rotating rod is provided with a fixing seat.
  • one side of the curved waist support extends to the outside of the backrest and is fixedly installed with a protective pad.
  • the backrest is installed on the chair body in a rotating manner and the structural characteristics of the backrest itself determine that when the user adjusts the back support angle, the backrest can only be turned backwards, and the backrest can only be turned backwards.
  • the reversed backrest will make the chair take up a lot of space, which will affect the walking of the staff in the office environment. At the same time, it is difficult to arrange more chairs reasonably in an environment with a small space.
  • the conventional backrest is installed on the chair body in a rotating manner and the structural characteristics of the backrest itself determine that when the user adjusts the back support angle, the backrest can only be turned backwards, and the backwards turned backrest will make the chair take up a lot of space , In the office environment, it will affect the movement of the staff. At the same time, it is difficult to arrange more chairs reasonably in the environment with less space.
  • the present invention aims to provide a chair and a chair back.
  • a backrest characterized in that it includes a backrest base body and a backrest part for being fixedly connected to a seat, the backrest part is located at the front side of the backrest base body and is hinged to the backrest base body through a hinge shaft, the backrest part
  • the backrest part is turned forward with the hinge shaft as the center of rotation to increase the back support angle; it also includes a backturn stop device that restricts the backrest part after the backrest part is turned forward to prevent the backrest part from turning backwards.
  • the backrest changes the structure of the backrest and the connection method between the backrest and the seat, and the back support angle is increased by turning the backrest of the backrest itself forward, so that the backrest after turning can be at the position of the seat.
  • the position of the rest of the backrest --- the backrest base remains unchanged. Therefore, when the back support angle is increased, the chair can reduce the space occupation as much as possible.
  • the impact of walking is small, and it is also conducive to arranging more chairs more reasonably in the case of small space.
  • the rear overturning stop device includes a flexible connection structure connecting the backrest part and the backrest base;
  • the flexible connection structure includes a sliding piece with a sliding channel hinged on the backrest part,
  • the sliding base part on the base body, the sliding base part is limited in the sliding channel and the sliding part can slide on the sliding base part, wherein the sliding part includes a hinge part, an upper limit plate part and a lower limit plate part connected with the hinge part , a sliding channel is formed between the upper limit plate part and the lower limit plate part; and a stop mechanism that restricts the sliding part after the backrest part is flipped forward is also included.
  • the stop mechanism includes a stop block with a stop part, a stop fitting block arranged in the sliding channel, and a stop block rotating shaft for installing the stop block is arranged on the sliding base member, and the The surface depression of the sliding base member facing the stop fitting block is formed as an installation area where the stop block can be installed, and a support portion for anti-rotation support for the stop block is arranged in the installation area, and the stop fit block is provided
  • the stop hook grooves include a hook part and a lead-out part connected with the hook part, and a guide part Guide the stop block to slip out of the stop hook groove when the backrest is turned forward.
  • the center of gravity of the stop block is located between the rotation axis of the stop block and the stop hook groove.
  • an elastic pressure mechanism is included, and the elastic pressure mechanism includes a torsion spring to provide an elastic force to make the stop part enter into the stop hook groove.
  • the slider further includes a left limit plate part and a right limit plate part connecting the upper limit plate part and the lower limit plate part, and the left limit plate part and the right limit plate part are provided with A relief slot for the rotation shaft of the stop block is provided, and the rotation shaft of the stop block passes through the relief slot.
  • an operating part connected to the rotating shaft of the stopper is provided on the side of the slider.
  • the stop mechanism includes a lock plate connecting the upper limit plate part and the lower limit plate part and having a lock hole, a plurality of lock hole matching holes arranged in a straight line on the side of the sliding base member, and a lock rod.
  • a chair comprising the backrest in any of the above technical solutions.
  • the turned backrest can be placed within the horizontal projection range of the seat, while the rest of the backrest --- the backrest base
  • the position of the chair does not change. Therefore, when the back support angle is increased, the space occupied by the chair can be reduced as much as possible. In the office environment, the impact on the walking of the staff is less, and it is also more reasonable in the case of small space. place more chairs.
  • the specially set stop hook groove only needs to give the backrest part the turning force to turn forward when the backrest part is turned forward, without operating the stop mechanism, which is more convenient and quick to realize Increase the back support angle.
  • the center of gravity of the stop block is between the rotation axis of the stop block and the stop hook groove. Under the action of the gravity of the stop block, the stop block will automatically enter the next stop hook groove, and , when achieving this effect, no other auxiliary parts are involved to assist the stop part to enter the stop hook groove. For the whole stop mechanism, there are fewer parts, the structure is more simplified, and the installation and manufacturing are also more efficient. convenient.
  • Fig. 1 is a schematic diagram of the structure of the backrest
  • Fig. 2 is an exploded schematic view of the rear flip-stop device at a first viewing angle
  • Fig. 3 is an exploded schematic view of the rear flip-stop device in a second viewing angle
  • Fig. 4 is a schematic cross-sectional view of the rear flip stop device
  • Figure 5 is a schematic diagram of the coordination of the stop mechanism
  • Fig. 6 is a structural schematic diagram of a stop block
  • Fig. 7 is the rear overturn stop device with stop block in Fig. 6;
  • Fig. 8 is a schematic diagram of the back support angle in the prior art
  • Fig. 9 is a schematic diagram of the structure of the backrest.
  • a backrest includes a backrest base body 1 and a backrest portion 2.
  • the backrest base body 1 is used to be fixedly connected to the seat, and the bottom of the backrest base body 1 is provided with a seat connection portion 11.
  • the backrest 2 provides support for the back of the human body.
  • the backrest 2 is located on the front side of the backrest base 1 and is hinged to the backrest base 1 through the hinge shaft 4, preferably Ground, both sides of the upper part of the backrest part 2 are hinged with the backrest base body 1 through the hinge shaft 4, the backrest base body 1 can be but not limit frame structure, the bottom of the backrest part 2 is located above the seat connecting part 11, and in the vertical As close as possible to the seat connecting part 11 in the direction, the back rest part 2 is turned forward with the hinge shaft 4 as the center of rotation to increase the back support angle ⁇ see the background technology, the support of the backrest to the back of the human body The angle between the force and the horizontal plane is called the back support angle, as shown in Figure 8 ⁇ .
  • the backrest has changed the connection mode with the seat and its own structure, relying on the backrest part 2 of the backrest itself Flip forward to increase the back support angle, so that the flipped backrest part 2 can be within the horizontal projection range of the seat, while the rest of the backrest --- the position of the backrest base 1 does not change. Therefore, in When the back support angle is increased, the space occupied by the chair can be reduced as much as possible, which has less impact on the walking of the staff in the office environment, and it is also conducive to more reasonable arrangement of more chairs in the case of small space. It includes a rear overturn stop device 3 that restricts the backrest 2 after the backrest 2 is overturned forward to prevent the backrest 2 from overturning backward.
  • the rear overturning stop device 3 includes a movable connection structure 31 connecting the backrest part 2 and the backrest base 1, and the movable connection structure 31 includes a sliding channel 3111 hinged on the backrest part 2
  • the sliding part 311, the sliding base part 312 hinged on the backrest base 1, the backrest part 2 and the backrest base 1 are respectively provided with the hinge seat 00 hinged with the sliding part 311 and the sliding base part 312, the sliding base part 312
  • the end part is hinged to the corresponding hinge seat 00
  • the slider 311 includes a hinge part 3112, an upper limit plate part 3113 and a lower limit plate part 3114 connected with the hinge part 3112, and the upper limit plate part 3113 and the lower limit plate part
  • the sliding channel 3111 is formed between the parts 3114, and the sliding base part 312 is limited in the sliding channel 3111.
  • the rear turning stop device 3 also includes a stop mechanism 32, and the stop mechanism 32 will turn the backrest part 2 forward after the backrest part 2 has been turned forward.
  • the slider 311 is limited, so as to achieve the purpose of limiting the backrest 2 after the backrest 2 is turned forward.
  • the stopper mechanism 32 includes a stopper 3211 and a The stop block 321 of the force part 3212, the stop fitting block 322 arranged in the sliding channel 3111, the stop block rotating shaft 323 for installing the stop block 321 is arranged on the sliding base part 312, and the sliding base part 312 faces
  • the surface depression of the stop fitting block 322 is formed as an installation area 327, and the stop block rotating shaft 323 passes through the installation area 327, and the stop block 321 is located at the installation area 327, that is, the stop block 321 is limited in the installation area 327, and the installation area 327 is provided with a supporting part 324 for anti-rotation support of the stop block 321, and the stop fitting block 322 is provided with a plurality of stops distributed along the length direction of the sliding channel 3111 for cooperating with the stop part 3211.
  • the movable hook groove 325 when the stopper 3211 fits in the stopper hook groove 325, the supporting part 324 supports the force-receiving part 3212 of the stopper 321, providing a force that can act on the stopper 321 with the slider 311
  • the torque equal to the torque makes the stop block 321 in a static state.
  • the stop hook groove 325 includes a hook part 3251 and a lead-out part 3252 connected with the hook part 3251 , the hook part 3251 hooks on the stop part 3211 when the stop part 3211 fits into the stop hook groove 325 , Let the stopper 3211 play the role of stopper, the lead-out part 3252 lifts the stopper 3211 when the backrest 2 is turned forward, and guides the stopper 321 to slip off from the stopper hook groove 325 and enter another stopper In the hook groove 325, the specially set stop hook groove 325 only needs to give the backrest 2 a turning force to turn forward when the backrest 2 is turned forward, and there is no need to operate the stop mechanism 32. , it is more convenient and quick to adjust the back support angle.
  • an elastic pressure mechanism 326 is also included, and the elastic pressure mechanism 326 is a twist
  • the torsion spring is set on the stop block rotating shaft 323, one end can be pressed against the stop block 321, and the other end can be pressed against the inner wall of the installation area 327, providing an elastic force to make the stop part 3211 enter the stop hook groove 325 in.
  • the stop block 321 is also provided with a receiving groove 3213 for accommodating the torsion spring, which limits the axial position of the torsion spring on the rotation shaft 323 of the stop block.
  • the stop portion 3211 on the stop block 321 adaptively enter the next stop hook groove 325 after the lead-out portion 3252 lifts the stop portion 3211
  • the stop The center of gravity of the movable block 321 is between the rotating shaft 323 of the stop block and the stop hook groove 325.
  • a weight-increasing block may also be arranged on the stop portion 3211 .
  • the above-mentioned stop block 321, under the influence of the self-gravity of the stop block 321, will self-adaptively enter into the next stop hook groove 325, and when this effect is realized, other auxiliary parts will not be involved.
  • the auxiliary stop part 3211 enters into the stop hook groove 325.
  • the slider 311 further includes a left limit plate portion 3115 and a right limit plate portion 3116 connecting the upper limit plate portion 3113 and the lower limit plate portion 3114, and the left limit plate portion 3115 and the right limit plate portion
  • the plate part 3116 can enhance the structural strength of the slider 311 and improve the service life of the backrest.
  • the left limit plate part 3115 and the right limit plate part 3116 are provided with a relief groove for the stop block rotating shaft 323 3117 , the stop block rotating shaft 323 passes through the relief slot 3117 .
  • the above-mentioned backrest is precisely because the movable connection structure 31 is used to connect the backrest part 2 and the backrest base body 1.
  • the rotating shaft 323 of the stop block is turned to allow the stopper to stop.
  • Part 3211 is disengaged from the stop hook groove 325, and the backrest 2 is slowly turned backwards by holding the backrest 2 with the hand. After the backrest 2 is reset, loosen the stop block rotating shaft 323. It is convenient to reset by the part 2.
  • the side of the slider 311 is provided with an operating part 33 connected to the stopper shaft 323.
  • the operating part 33 can be, but not limited to, a handle.
  • the operation part 33 allows the rotation of the stopper shaft 323 Work just got easier.
  • the structure of another stop mechanism 32 is as follows: as shown in Figure 5, the stop mechanism 32 includes a lock plate 328 that connects the upper limit plate portion 3113 and the lower limit plate portion 3114 and has a lock hole 3281, is arranged on a sliding A plurality of locking hole pairing holes 3282 and locking rods 329 are distributed in a straight line on the side of the base member 312 .
  • the locking mechanism is: when the backrest 2 is turned forward, the locking rod 329 is inserted into the locking hole 3281 and one of the matching holes 3282 of the locking hole to limit the sliding member 311 .
  • the backrest 2 includes a frame 21 and a mesh 22 connected to the frame 21, the mesh 22 is used to support
  • the back of the human body provides better comfort for the human body, and the frame body 21 and the mesh cloth 22 are combined to reduce material cost and weight.
  • the bottom of the frame body 21 corresponding to the waist of the human body bends toward the backrest base 1 to form a curved portion 20, which can better conform to ergonomics.
  • the frame body 21 is precisely because of the curved bottom of this frame body 21 that the frame body 21 is formed into a special-shaped curve.
  • the mesh cloth 22 cannot be well installed on the special-shaped structure of the frame body 21.
  • the frame body 21 further includes an upper frame body 211 and a lower frame body connected to the bottom of the upper frame body 211 212 , the bending part 20 is located on the lower frame body 212 .
  • the embodiment also relates to a chair, including the above-mentioned backrest.

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

Abstract

一种椅子以及靠背，其中，靠背包括靠背基体（1）、背靠部（2），背靠部（2）位于靠背基体（1）的前侧并和靠背基体（1）相铰接，背靠部（2）可以向前翻转而调大背部支撑角度，还包括在背靠部（2）向前翻转后将背靠部（2）限制住以防止背靠部（2）往后翻转的后翻转止动装置（3）。在调大背部支撑角度时能够尽可能地让椅子降低空间占用量，在办公环境中对工作人员的走动影响较小，也有利于空间小的情况下更加合理地布置更多的椅子。

Description

椅子以及靠背 技术领域
本发明涉及椅子以及靠背，属于休息设备领域。
 背景技术
椅子作为人们日常生活必不可少的用品之一，为人们的休憩以及办公带来方便。
在椅子追求的其中一种功能中，需要能够对椅子靠背的倾角进行调节，从而调整背部支撑角度{靠背对人体背部的支撑力与水平面的夹角称之为背部支撑角度，参见图8所示}，让用户获得不同背部支撑角度的需求，例如，在工作状态时，需要的背部支撑角度要小，靠背的倾角要小，人体背部容易绷直，用户工作时容易绷紧工作状态，在休息状态下，需要的背部支撑角度要大一点，靠背的倾角要大，用户容易放松。
如申请号为CN202021018964.6 的中国专利公布了一种带腰靠调节装置的椅子，包括椅子本体和转动安装在椅子本体上的靠背，所述椅子本体的顶部开设有转动槽，转动槽的两侧内壁上转动安装有同一个转动杆，且靠背固定套设在转动杆上，转动杆上固定套设有固定座，固定座的外侧呈环形等间距开设有多个卡槽，转动槽的一侧内壁上开设有螺纹孔，螺纹孔内螺纹安装有固定螺栓，且固定螺栓与对应的卡槽相适配，靠背的一侧开设有第一槽，第一槽内滑动安装有弧形腰撑，弧形腰撑的一侧延伸至靠背的外侧并固定的安装有保护垫。该专利中， 实现了上述的功能，然而，靠背以转动安装方式安装于椅子本体上以及靠背本身的结构特性，决定了用户在调大背部支撑角度时，靠背只能是向后翻转，而向后翻转的靠背会使得椅子占用空间大，在办公环境中，对工作人员的走动造成影响，同时，在空间较小的环境中也难以合理地布置更多的椅子。
 技术问题
常规的靠背以转动安装方式安装于椅子本体上以及靠背本身的结构特性，决定了用户在调大背部支撑角度时，靠背只能是向后翻转，而向后翻转的靠背会使得椅子占用空间大，在办公环境中，对工作人员的走动造成影响，同时，在空间较小的环境中也难以合理地布置更多的椅子。
 技术解决方案
针对现有技术的不足，本发明旨在提供椅子以及椅子靠背。
一种靠背，其特征在于，包括用于固定连接到椅座上的靠背基体、背靠部，背靠部位于靠背基体的前侧并通过铰接轴和所述靠背基体相铰接，所述背靠部以所述铰接轴为转动中心向前翻转而调大背部支撑角度；还包括在背靠部向前翻转后将背靠部限制住以防止背靠部往后翻转的后翻转止动装置。
本技术方案中，靠背改变了靠背的结构以及靠背与椅座的连接方式，依靠靠背本身的背靠部向前翻转而调大背部支撑角度，能够让翻转后的背靠部处在椅座的水平投影范围内，而靠背的其余部位---靠背基体的位置则不发生变化，所以，在调大背部支撑角度时能够尽可能地让椅子降低空间占用量，在办公环境中对工作人员的走动影响较小，也有利于空间小的情况下更加合理地布置更多的椅子。
优选的，所述后翻转止动装置包括连接所述背靠部与所述靠背基体的活动连接结构；活动连接结构包括铰接在所述背靠部上的具有滑动通道的滑动件、铰接在靠背基体上的滑动基体件，滑动基体件限位于滑动通道中且滑动件可在滑动基体件上滑动，其中，滑动件包括铰接部、和所述铰接部连接的上限位板部与下限位板部，所述上限位板部与下限位板部之间形成滑动通道；还包括在背靠部向前完成翻转后将滑动件限制住的止动机构。
优选的，所述止动机构包括具有止动部的止动块、设置在滑动通道中的止动配合块，滑动基体件上设置有用于安装所述止动块的止动块转轴，所述滑动基体件之面向所述止动配合块的表面凹陷形成为可安装所述止动块的安装区，安装区中设置有用于对止动块进行防转支撑的支撑部，止动配合块设置有延滑动通道长度方向分布的用于和所述止动部配合止动的多个止动勾槽；所述止动勾槽包括勾部以及和所述勾部相连接的导出部，引导部在背靠部向前翻转时引导止动块从止动勾槽中滑脱。
优选的，所述止动块的重心处于止动块转轴以及止动勾槽之间。
优选的，包括弹性压力机构，弹性压力机构包括扭簧，提供一弹性力使止动部进入到止动勾槽中。
优选的，所述滑动件还包括连接所述上限位板部与下限位板部的左限位板部以及右限位板部，所述左限位板部以及右限位板部上设置有让位于所述止动块转轴的让位槽，所述止动块转轴穿过所述让位槽。
优选的，所述滑动件的侧方设置有和所述止动块转轴相连接的操作部件。                      
优选的，止动机构包括连接所述上限位板部与下限位板部的并具有锁孔的锁板、设置在滑动基体件侧面的呈直线分布的多个锁孔配对孔、锁杆。
一种椅子，包括上述任意技术方案中的靠背。
 有益效果
1： 本发明，依靠靠背本身的背靠部向前翻转而调大背部支撑角度，能够让翻转后的背靠部处在椅座的水平投影范围内，而靠背的其余部位---靠背基体的位置则不发生变化，所以，在调大背部支撑角度时能够尽可能地让椅子降低空间占用量，在办公环境中对工作人员的走动影响较小，也有利于空间小的情况下更加合理地布置更多的椅子。
2：本发明，特殊设置的止动勾槽，在向前翻转背靠部时，只需要给予背靠部向前翻转的翻转力即可，无需对止动机构进行操作，更加方便快捷地实现调大背部支撑角度。
3：本发明，止动块的重心处于止动块转轴以及止动勾槽之间，在止动块重力的作用下，止动块会自适应是进入到下一个止动勾槽中，并且，在实现这种效果时，不会涉及到其他的辅助零件来辅助止动部进入到止动勾槽中，对于整个止动机构而言，零部件少，结构更加简化，安装制造上也更加方便。
 附图说明
图1为靠背的结构示意简图；
图2为后翻转止动装置在第一视角的爆炸示意图；
图3为后翻转止动装置在第二视角的爆炸示意图；
图4为后翻转止动装置的剖视示意图；
图5为止动机构的配合示意简图；
图6为止动块的结构示意图；
图7为具有图6中止动块的后翻转止动装置；
图8为现有技术中背部支撑角度的示意图；
图9为背靠部的结构示意图。
 本发明的实施方式
下面结合实施例对本发明作进一步的解释：
实施例：如图1-4所示，一种靠背，包括靠背基体1、背靠部2，靠背基体1用于固定连接到椅座上，靠背基体1的底部设置有椅座连接部11，通过椅座连接部11连接到椅座上，背靠部2为人体背部提供支撑力，背靠部2位于靠背基体1的前侧并通过铰接轴4和所述靠背基体1相铰接，较佳地，背靠部2的上部两侧通过铰接轴4与靠背基体1相铰接，靠背基体1可以但不限位框结构，背靠部2的底部位于椅座连接部11的上方，并在竖向方向上尽量靠近于椅座连接部11，所述背靠部2以所述铰接轴4为转动中心向前翻转而调大背部支撑角度{参见背景技术中所述，靠背对人体背部的支撑力与水平面的夹角称之为背部支撑角度，参见图8所示}，与现有技术相比，该靠背改变了与椅座的连接方式以及本身的结构，依靠靠背本身的背靠部2向前翻转而调大背部支撑角度，能够使翻转后的背靠部2处在椅座的水平投影范围内，而靠背的其余部位---靠背基体1的位置则不发生变化，所以，在调大背部支撑角度时能够尽可能地让椅子降低空间占用量，在办公环境中对工作人员的走动影响较小，也有利于空间小的情况下更加合理地布置更多的椅子，该靠背还包括在背靠部2向前翻转后将背靠部2限制住以防止背靠部2往后翻转的后翻转止动装置3。
具体地，所述后翻转止动装置3包括连接所述背靠部2与所述靠背基体1的活动连接结构31，活动连接结构31包括铰接在所述背靠部2上的具有滑动通道3111的滑动件311、铰接在靠背基体1上的滑动基体件312，背靠部2和靠背基体1上分别设置有与滑动件311和滑动基体件312相铰接的铰接座00，滑动基体件312的端部和对应的铰接座00相铰接，滑动件311包括铰接部3112、和所述铰接部3112连接的上限位板部3113与下限位板部3114，所述上限位板部3113与下限位板部3114之间形成所述滑动通道3111，滑动基体件312限位于滑动通道3111中，背靠部2在向前翻转时，滑动件311通过铰接部3112相对于背靠部2发生转动，滑动基体件312相对于靠背基体1也发生转动，滑动件311在滑动基体件312上滑动，该后翻转止动装置3还包括止动机构32，止动机构32在靠背部2完成向前翻转后将滑动件311限制住，从而达到在背靠部2向前翻转后将背靠部2限制住的目的，其中一种止动机构32的结构为：止动机构32包括具有止动部3211以及受力部3212的止动块321、设置在滑动通道3111中的止动配合块322，滑动基体件312上设置有用于安装所述止动块321的止动块转轴323，滑动基体件312之面向止动配合块322的表面凹陷形成为安装区327，所述止动块转轴323穿过安装区327，止动块321位于安装区327，即止动块321被限制在安装区327，安装区327中设置有用于对止动块321进行防转支撑的支撑部324，止动配合块322设置有延滑动通道3111长度方向分布的用于和所述止动部3211配合止动的多个止动勾槽325，当止动部3211配合在止动勾槽325中时，支撑部324支撑住所述止动块321的受力部3212，提供一个能够与滑动件311作用到止动块321的扭矩相等的扭矩，让止动块321处于静止状态。所述止动勾槽325包括勾部3251以及和所述勾部3251相连接的导出部3252，勾部3251在止动部3211配合到止动勾槽325中时勾在止动部3211上，让止动部3211发挥止动作用，导出部3252在背靠部2向前翻转时将止动部3211抬起，引导止动块321从止动勾槽325中滑脱并进入到另一个止动勾槽325中，这种特殊设置的止动勾槽325，在向前翻转背靠部2时，只需要给予背靠部2向前翻转的翻转力即可，无需对止动机构32进行操作，更加方便快捷地实现调大背部支撑角度。
为了使得止动块321上的止动部3211在导出部3252抬起止动部3211后能够自适应地进入到下一个止动勾槽325中，还包括弹性压力机构326，弹性压力机构326为扭簧，扭簧套在止动块转轴323上，一端可抵在止动块321上，另一端可抵在安装区327的内壁上，提供一弹性力使止动部3211进入到止动勾槽325中。所述止动块321上还设置有用于容纳所述扭簧的容纳槽3213，对扭簧在止动块转轴323上的轴向位置进行限定。
同样地，为了使得止动块321上的止动部3211在导出部3252抬起止动部3211后能够自适应地进入到下一个止动勾槽325中，在另外一个实施例中，所述止动块321的重心处于止动块转轴323以及止动勾槽325之间，为使重心达到这种位置布置，参见图6-7所示，可以在受力部3212上开设减重槽3214，当然，也可以在止动部3211上配置增重块。上述止动块321，在止动块321自身重力的影响下，会自适应是进入到下一个止动勾槽325中，并且，在实现这种效果时，不会涉及到其他的辅助零件来辅助止动部3211进入到止动勾槽325中，对于整个止动机构32而言，零部件少，结构更加简化，安装制造上也更加方便。
较佳地，所述滑动件311还包括连接所述上限位板部3113与下限位板部3114的左限位板部3115以及右限位板部3116，左限位板部3115以及右限位板部3116能够增强滑动件311的结构强度，提高靠背的使用寿命，所述左限位板部3115以及右限位板部3116上设置有让位于所述止动块转轴323的让位槽3117，所述止动块转轴323穿过所述让位槽3117。
上述的靠背，正是由于采用活动连接结构31连接所述背靠部2与所述靠背基体1的缘故，在背靠部2需要调回到原来角度时，转动止动块转轴323让止动部3211从止动勾槽325中脱开，配合手部把住背靠部2让背靠部2缓慢向后翻转，在背靠部2复位后，松开止动块转轴323即可，背靠部2复位方便。
更进一步，所述滑动件311的侧方设置有和所述止动块转轴323相连接的操作部件33，操作部件33可以但不限定为手柄，操作部件33的让止动块转轴323的旋转工作变得更加简单。
另一种止动机构32的结构为：如图5所示，止动机构32包括连接所述上限位板部3113与下限位板部3114的并具有锁孔3281的锁板328、设置在滑动基体件312侧面的呈直线分布的多个锁孔配对孔3282、锁杆329。止动的机制为：当背靠部2向前翻转后，锁杆329插入到锁孔3281以及其中一个锁孔配对孔3282，将滑动件311限制住。
考虑到背靠部2的用料成本、重量以及舒适性，如图9所示，背靠部2包括框体21以及和所述框体21相连接的网布22，网布22用于支撑人体背部并为人体提供较好的舒适性，框体21和网布22结合在一起，降低料成本和重量。框体21对应于人体腰部的底部处向靠背基体1弯曲形成弯曲部20，能够更好地符合人体工学，但是，正是这种框体21由于底部弯曲的缘故，框体21形成为异形曲线轮廓，导致网布22不能很好地安装到框体21这种异形结构上，为此，更进一步，框体21包括上框体211、和所述上框体211底部相连接的下框体212，弯曲部20位于下框体212上。
实施例中还涉及到了一种椅子，包含上述的靠背。
上面所述的实施例仅是对本发明的优选实施方式进行描述，并非对本发明的构思和范围进行限定。在不脱离本发明设计构思的前提下，本领域普通人员对本发明的技术方案做出的各种变型和改进，均应落入到本发明的保护范围，本发明请求保护的技术内容，已经全部记载在权利要求书中。

Claims (10)

  1. 一种靠背，其特征在于，包括用于固定连接到椅座上的靠背基体（1）、背靠部（2），背靠部（2）位于靠背基体（1）的前侧并通过铰接轴（4）和所述靠背基体（1）相铰接，所述背靠部（2）以所述铰接轴（4）为转动中心向前翻转而调大背部支撑角度；还包括在背靠部（2）向前翻转后将背靠部（2）限制住以防止背靠部（2）往后翻转的后翻转止动装置（3）。
  2. 根据权利要求1所述的一种靠背，其特征在于，所述后翻转止动装置（3）包括连接所述背靠部（2）与所述靠背基体（1）的活动连接结构（31）；活动连接结构（31）包括铰接在所述背靠部（2）上的具有滑动通道（3111）的滑动件（311）、铰接在靠背基体（1）上的滑动基体件（312），滑动基体件（312）限位于滑动通道（3111）中且滑动件（311）可在滑动基体件（312）上滑动，其中，滑动件（311）包括铰接部（3112）、和所述铰接部（3112）连接的上限位板部（3113）与下限位板部（3114），所述上限位板部（3113）与下限位板部（3114）之间形成滑动通道（3111）；
    还包括在背靠部（2）向前完成翻转后将滑动件（311）限制住的止动机构（32）。
  3. 根据权利要求2所述的一种靠背，其特征在于，所述止动机构（32）包括具有止动部（3211）的止动块（321）、设置在滑动通道（3111）中的止动配合块（322），滑动基体件（312）上设置有用于安装所述止动块（321）的止动块转轴（323），所述滑动基体件（312）之面向所述止动配合块（322）的表面凹陷形成为可安装所述止动块（321）的安装区（327），安装区（327）中设置有用于对止动块（321）进行防转支撑的支撑部（324），止动配合块（322）设置有延滑动通道（3111）长度方向分布的用于和所述止动部（3211）配合止动的多个止动勾槽（325）；所述止动勾槽（325）包括勾部（3251）以及和所述勾部（3251）相连接的导出部（3252），引导部在背靠部（2）向前翻转时引导止动块（321）从止动勾槽（325）中滑脱。
  4. 根据权利要求3所述的一种靠背，其特征在于，所述止动块（321）的重心处于止动块转轴（323）以及止动勾槽（325）之间。
  5. 根据权利要求3所述的一种靠背，其特征在于，包括弹性压力机构（326），弹性压力机构（326）包括扭簧，提供一弹性力使止动部（3211）进入到止动勾槽（325）中。
  6. 根据权利要求2所述的一种靠背，其特征在于，所述滑动件（311）还包括连接所述上限位板部（3113）与下限位板部（3114）的左限位板部（3115）以及右限位板部（3116），所述左限位板部（3115）以及右限位板部（3116）上设置有让位于所述止动块转轴（323）的让位槽（3117），所述止动块转轴（323）穿过所述让位槽（3117）。
  7. 根据权利要求2或3或4或5或6所述的一种靠背，其特征在于，所述滑动件（311）的侧方设置有和所述止动块转轴（323）相连接的操作部件（33）。
  8. 根据权利要求2所述的一种靠背，其特征在于，止动机构（32）包括连接所述上限位板部（3113）与下限位板部（3114）的并具有锁孔（3281）的锁板（328）、设置在滑动基体件（312）侧面的呈直线分布的多个锁孔配对孔（3282）、锁杆（329）。
  9. 根据权利要求1所述的一种靠背，其特征在于，所述背靠部（2）包括框体（21）以及和所述框体（21）相连接的网布（22），框体（21）对应于人体腰部的底部处向靠背基体（1）弯曲形成弯曲部（20）；框体（21）包括上框体（211）、和所述上框体（211）底部相连接的下框体（212），弯曲部（20）位于下框体（212）上。
  10. 一种椅子，包含权利要求1或2或3或4或5或6或8或9或9所述的靠背。
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