WO2023207088A1 - 一种椅背升降机构 - Google Patents
一种椅背升降机构 Download PDFInfo
- Publication number
- WO2023207088A1 WO2023207088A1 PCT/CN2022/135745 CN2022135745W WO2023207088A1 WO 2023207088 A1 WO2023207088 A1 WO 2023207088A1 CN 2022135745 W CN2022135745 W CN 2022135745W WO 2023207088 A1 WO2023207088 A1 WO 2023207088A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adjustment
- chair back
- groove
- support frame
- lifting
- Prior art date
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- 230000007246 mechanism Effects 0.000 title claims abstract description 22
- 230000005489 elastic deformation Effects 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
-
- 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
Definitions
- the invention relates to a chair back lifting mechanism, which is mainly used in the technical field of office chairs.
- the seat back is an important component that provides support and comfort when the human body is seated.
- the chair back is often configured to be adjustable up and down to suit the upper body height of different people.
- Existing lift adjustment mechanisms generally adopt friction fit or bump fit, so that the adjustment of the chair back forms a gear adjustment.
- the above two gear adjustment methods are usually triggered by buttons to achieve adjustment.
- the operation is not intuitive, the life is short, and the stability is poor.
- the patent application with publication number CN209573966U discloses a quick reset structure for lifting the chair back: the chair back lifting structure contacts the gear position of the lifting gear bar through the buckle part of the buckle, and the elastically compressed torsion spring contacts the buckle.
- the return function realizes the gear adjustment of the chair back lifting; through the highest gear of the lifting gear bar, the coil spring of the circlip and the slot opening width slightly smaller than the diameter of the coil spring, the chair back lifting structure can be raised to the highest position.
- the coiled spring buckles into the slot, causing the buckle part of the buckle to not contact the gear of the lifting gear bar, and the lift chair back can be lowered as a whole; through the contact between the slope contact point and the slope hypotenuse, the coil spring and The separation of the slot and the return of the buckle.
- the components of the above technical solution are too complex, and are provided with circlips and torsion springs, and the circlip structure also requires special processing, and the installation and processing costs are high; in addition, when used, the buckle is connected to the gear bar, The chair back bears most of the user's load, and the structural strength cannot be guaranteed; it is easily damaged after long-term use.
- the technical problem to be solved by the present invention is to provide a chair back lifting mechanism with a more streamlined structure and a low failure rate.
- the present invention is achieved through the following technical solutions.
- a chair back lifting mechanism includes a support frame and a chair back frame that can move up and down along the support frame; the support frame is provided with an adjustment groove extending up and down, and one side of the adjustment groove is connected with a plurality of outer sides of the adjustment groove A gear slot extends out and tilts downward; the chair back frame is rotatably connected to a lift adjustment piece that can swing left and right, and the lift adjustment piece has an adjustment portion inserted into the adjustment slot or the gear slot; the chair back lift An elastic return member is set up to drive the adjustment part to slide into the gear slot from the adjustment groove; the lifting adjustment part is provided with a locking structure, and the adjustment part slides downward from the top of the adjustment groove and slides upward from the bottom of the adjustment groove. , the locking structure is respectively used to lock the adjustment part so that it cannot swing left and right, and to unlock the adjustment part to allow it to swing left and right.
- the locking structure includes a sliding plate that can move up and down along the support frame.
- the sliding plate has transverse grooves and longitudinal grooves; the transverse grooves allow the adjustment portion to pass through and swing left and right, so that the adjustment portion is in an unlocked state. state; the longitudinal groove is connected to the bottom edge of the transverse groove.
- the longitudinal groove can block the adjustment part so that it cannot swing left and right, so that the adjustment part is in a locked state.
- the support frame is provided with two racks extending up and down; the left and right sides of the sliding plate have elastic connection parts that mesh with the corresponding racks respectively, and the elastic connection parts can generate elasticity. Deformation allows the sliding plate to move up and down along the support frame.
- the top edge or bottom edge of the sliding plate is provided with a notch;
- the elastic connection part includes a limiting part of the sliding plate from the notch to the side, and at least one side from the limiting part to
- a latching structure is formed by protruding from the outside, and the latching structure is clipped into the tooth gap of the rack.
- a fixed plate is fixedly connected to the support frame, and the adjustment groove, gear groove, and rack are all formed on the fixed plate.
- the chair back frame is provided with a through hole that runs from front to back;
- the lift adjustment member is rotationally connected to the front of the chair back frame, and the adjustment part is formed by extending the lift adjustment member backward, and the adjustment part Pass through the through hole, transverse groove or longitudinal groove and insert into the adjustment groove or gear groove.
- the front side of the chair back frame has a column extending forward;
- the lifting adjustment member has a collar structure, and the collar structure is rotatably sleeved on the column.
- the front side of the chair back frame has a fence structure surrounding the lifting adjustment member; the two ends of the elastic return member are respectively supported on the lifting adjustment member and the inner wall of the fence structure.
- the elastic adjustment member has a protrusion, and one end of the elastic return member is sleeved on the protrusion.
- the support frame has two left-right symmetrical longitudinal brackets
- the chair back frame has two longitudinal beams that can slide up and down along the longitudinal brackets; both longitudinal brackets are provided with adjustment slots and gears. position slot, and there are lifting adjustment parts on both longitudinal beams.
- the chair back lifting device of the present invention does not require additional control switches.
- the user When adjusting, the user only needs to apply upward or downward pulling force on the chair back frame to adjust the lifting.
- the operation is very convenient and practical, and is different from the lifting and sliding devices used in the prior art. Compared with the moving mechanism, the overall mechanism is more streamlined and the production and processing costs are reduced.
- Figure 1 is an exploded diagram of the chair back lifting mechanism
- Figure 2 is a schematic structural diagram of the locking structure
- Figure 3 is a schematic structural diagram of the fixed plate
- Figure 4 is a schematic structural diagram of the lifting adjustment member
- Figure 5 is a partial structural diagram of the chair back frame.
- a chair back lifting mechanism includes a support frame 1 and a chair back frame 4.
- the bottom end of the support frame 1 is fixedly connected to the rear end of the seat on the chair.
- the support frame 1 moves from the bottom end to After extending for a period and then bending upward, the chair back frame 4 has a back frame to support the user's back. It is slidably connected to the front of the support frame 1 and can be moved up and down along the support frame 1 Move it to adjust its height.
- the support frame 1 is provided with an adjustment slot 22 extending up and down.
- One side of the adjustment slot 22 is connected with a plurality of gear slots 21.
- the gear slots 21 extend toward the outside of the adjustment slot 22 and are inclined downward. , the tilt range is 40°-60°.
- the chair back frame 4 is provided with a lifting adjustment member 52.
- the lifting adjustment member 52 is a long strip structure, one end of which is rotatably connected to the chair back frame 4, so that the lifting adjustment member 52 can swing left and right. 52 has an adjustment portion 521 inserted into the adjustment groove 22 or the gear groove 21 .
- the adjusting portion 521 is inserted into a gear slot 21 and against the end of the gear slot 21, the seat back frame 4 is fixed relative to the support frame 1.
- the adjusting portion 521 slides from the end of the gear slot 21 to the base until it slides into the adjusting slot 22, so that the seat back frame 4 can move upward along the support frame 1.
- the chair back lifting frame is provided with an elastic return member 51 , which acts on the lifting adjustment member 52 to drive the adjustment portion 521 to slide into the gear slot 21 from the adjustment slot 22 .
- an elastic return member 51 acts on the lifting adjustment member 52 to drive the adjustment portion 521 to slide into the gear slot 21 from the adjustment slot 22 .
- the lifting adjustment member 52 is provided with a locking structure.
- the locking structure is used to lock the adjustment portion 521 so that it cannot move left or right. Swing and unlock the adjustment part 521 to allow it to swing left and right. Therefore, after the user adjusts the seat back frame 4 to the highest gear, the user then pulls the seat back frame 4 upward so that the adjustment part 521 slides into the adjustment groove 22 and is located at the top of the adjustment groove 22. Under the locking action of the locking structure, the adjusting part 521 can no longer be driven by the elastic return member 51 to snap into the gear slot 21, that is, the chair back frame 4 can move up and down freely.
- the locking structure includes a sliding plate 3 with transverse grooves 31 and longitudinal grooves 32 .
- the sliding plate 3 has a square shape and is clamped between the chair back frame 4 and the supporting frame 1.
- the sliding plate 3 is slidingly connected to the supporting frame 1 and can slide up and down along the supporting frame 1.
- the transverse groove 31 allows the adjustment part 521 to pass through and swing left and right without interfering with the adjustment part 521 sliding into or out of the gear groove 21 , that is, the adjustment part 521 is in an unlocked state when passing through the transverse groove 31 .
- the longitudinal groove 32 is connected to the bottom edge of the transverse groove 31, so that the transverse groove 31 and the longitudinal groove 32 form an L-shaped groove.
- the left and right width of the longitudinal groove 32 is slightly larger than that of the adjusting portion 521. Therefore, when the adjusting portion 521 slides into the longitudinal groove 32 from the transverse groove 31, the longitudinal groove 32 can block the adjusting portion 521 so that it cannot swing left and right, that is, it is adjusted. When the portion 521 is located in the longitudinal groove 32, it is in a locked state.
- the adjusting portion 521 slides from the uppermost gear slot 21 into the adjusting slot 22 and moves to the top of the adjusting slot 22 , the adjusting portion 521 passes through the transverse slot 31 and resists the top edge of the transverse slot 31 .
- the adjusting portion 521 moves downward along the adjusting groove 22, the adjusting portion 521 slides into the longitudinal groove 32 from the transverse groove 31 and is in a locked state.
- the adjusting part 521 moves to the bottom end of the adjusting groove 22 and then moves upward, the adjusting part 521 slides into the transverse groove 31 from the longitudinal groove 32 and is in an unlocked state.
- the support frame 1 is provided with two racks 23 extending up and down;
- the elastic connection part can produce elastic deformation so that the sliding plate 3 can move up and down along the support frame 1 . Therefore, when the adjusting portion 521 moves upward against the top edge of the transverse groove 31 , the sliding plate 3 can be driven to move upward.
- the sliding plate 3 In other cases, the sliding plate 3 cannot move up and down through its elastic connection part and the rack 23, thereby ensuring that the adjusting part 521 can be stably maintained in the longitudinal direction when it is in the locked state and the unlocked state respectively.
- a notch 333 is opened on the top or bottom edge of the sliding plate 3
- the elastic connection portion includes a limiting portion 331 of the sliding plate 3 from the notch 333 to the side, and at least one side of the sliding plate 3 bounded by the limiting portion 331 .
- the engaging structure 332 is formed by protruding outward from the side, and the engaging structure 332 is engaged in the tooth gap of the rack 23 .
- the root of the elastic connection part is integrally connected with the sliding plate 3, and its body extends outward from the root, so that the elastic connection part can be bent and deformed in the left and right directions, and the clamping part is
- the structure 332 can be disengaged from the tooth gap of the rack 23 and then clicked into the upper or lower tooth gap, so that the sliding plate 3 can slide up and down along the rack 23 .
- a fixed plate 2 is provided on the front of the support frame 1, and the fixed plate 2 is fixed on the support frame 1 through fasteners.
- the adjustment groove 22, the gear groove 21, and the rack 23 are all formed on the fixed plate.
- the above functional structures are made more reasonable in terms of structural layout, avoiding affecting the sliding connection relationship between the chair back frame 4 and the support frame 1.
- the functional structures such as the adjustment slot 22, the gear slot 21, and the rack 23 On the fixed plate 2
- the overall structure is also made more compact.
- the chair back frame 4 is provided with a through hole 41 that penetrates from front to back, and the lifting adjustment member 52 is rotatably connected to
- the adjustment part 521 is formed by extending backward from the lifting adjustment part 52.
- the lifting adjustment part 52 and the adjustment part 521 are an integral structure, and the adjustment part 521 passes through the through hole, the transverse groove 31 or the longitudinal groove. 32 and inserted into the adjustment slot 22 or the gear slot 21.
- the front side of the chair back frame 4 has a column 42 extending forward; the lifting adjustment member 52 has a collar structure 522, and the collar structure 522 is rotatably sleeved on the cylinder 42. More specifically, the collar structure 522 is formed on the top of the lifting adjustment member 52 , and the adjustment portion 521 is formed on the back of the lower part of the lifting adjustment member 52 .
- the front side of the chair back frame 4 has a fence structure 43 surrounding the lifting adjustment member 52.
- the upper part of the fence structure 43 wraps the collar structure 522, and the lower part has a certain width in the left and right directions to allow the lifting adjustment.
- Part 52 swings left and right. Both ends of the elastic return member 51 are respectively supported on the lifting adjustment member 52 and the inner wall of the fence structure 43 , thereby providing stable elastic support to the lifting adjustment member 52 .
- the elastic adjustment member 51 there is a protruding portion 523 on the upper body.
- the protruding portion 523 has a columnar structure.
- the elastic return member 51 is configured as a return spring, and one end thereof is sleeved on the protruding portion 523.
- a cover 44 is provided on the front of the chair back frame 4, and the cover 44 is fixedly connected to the fence structure 43, thereby forming a closed space with the fence structure 43 to accommodate the lifting adjustment member 52 and the elastic return member 51. Play the role of protecting both.
- the support frame 1 has two left and right symmetrical longitudinal brackets.
- the overall structure of the support frame 1 is a bifurcated structure.
- the chair back frame 4 has two longitudinal beams that can slide up and down along the longitudinal supports.
- the two longitudinal supports are provided with adjustment slots 22 and gear slots 21.
- both longitudinal beams are provided with lifting adjustment members 52, and the left-right symmetrical overall structural arrangement makes the lifting action more stable and reliable.
Landscapes
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
一种椅背升降机构，包括支撑架（1）、可沿支撑架（1）上下移动的椅背架（4）；支撑架（1）上设有上下延伸的调节槽（22），调节槽（22）的一侧边连接有多个向调节槽（22）的外侧延伸而出并且向下倾斜的档位槽（21）；椅背架（4）转动连接有可左右摆动的升降调节件（52），升降调节件（52）具有插设在调节槽（22）或档位槽（21）的调节部（521）；椅背升降机构设有弹性复位件（51），用于驱使调节部（521）由调节槽（22）滑入档位槽（21）；升降调节件（52）设有锁定结构，在调节部（521）由调节槽（22）的顶端向下滑动、由调节槽（22）的底端向上滑动时，锁定结构分别用于将调节部（521）锁定使其无法左右摆动、将调节部（521）解锁允许其左右摆动。椅背升降机构的结构精简，故障率较低。
Description
本发明涉及一种椅背升降机构，主要应用在办公椅的技术领域。
座椅的椅背是提供人体坐姿状态下支撑舒适度的重要部件，目前，为有效提供更宽广的适应性，椅背常被配置为升降可调节，以适配不同人做座椅的上身高度。现有的升降调节机构一般采用摩擦配合或凸点配合的方式，使椅背的调节形成档位调节。以上两者档位调节方式通常由按钮触发实现调节，但由于该类结构操作不直观，寿命较短，且稳定性较差。
如公开号为CN209573966U的专利申请公开了一种升降椅背的快速复位结构：由椅背升降结构通过卡扣的卡扣部分与升降档位条的档位接触以及弹性压缩的扭簧对卡扣的回位作用实现椅背升降的档位调节；通过升降档位条的最高档位、卡簧的圈状弹簧以及略小于圈状弹簧直径的槽孔开口宽度，实现椅背升降结构升至最高位置时圈状弹簧扣入槽孔，导致卡扣的卡扣部分不与升降档位条的档位接触，升降椅背得以整体下降；通过斜坡触点与斜坡斜边的接触实现圈状弹簧与槽孔的分离和卡扣的回位。
但上述技术方案的零部件过于复杂，设有卡簧及扭簧，且卡簧结构还需要特殊化处理，安装、加工成本较高；再者使用时，卡扣卡接在档位条内，而椅背承受用户大部分的载荷，结构强度不能得到保证；长时间使用容易损坏。
本发明要解决的技术问题是提供一种椅背升降机构，结构更加精简，故障率较低。
本发明是通过以下技术方案来实现的。
一种椅背升降机构，包括支撑架、可沿支撑架上下移动的椅背架；所述支撑架上设有上下延伸的调节槽，调节槽的一侧边连接有多个向调节槽的外侧延伸而出并且向下倾斜的档位槽；所述椅背架转动连接有可左右摆动的升降调节件，升降调节件具有插设在调节槽或档位槽的调节部；所述椅背升降架设有弹性复位件，用于驱使调节部由调节槽滑入档位槽；所述升降调节件设有锁定结构，在调节部由调节槽的顶端向下滑动、由调节槽的底端向上滑动时，锁定结构分别用于将调节部锁定使其无法左右摆动、将调节部解锁允许其左右摆动。
作为本发明的进一步改进，所述锁定结构包括可沿支撑架上下移动的滑动板，滑动板上具有横向槽和纵向槽；所述横向槽允许调节部穿过并且左右摆动，使得调节部处于解锁状态；所述纵向槽连接在横向槽的底边，所述调节部由横向槽滑入纵向槽时，所述纵向槽可卡住调节部使其无法左右摆动，使得调节部处于锁定状态。
作为本发明的进一步改进，所述支撑架上设有两个上下延伸的齿条；所述滑动板的左右两侧具有分别和对应齿条啮合的弹性连接部，所述弹性连接部可产生弹性变形，使得滑动板可沿支撑架上下移动。
作为本发明的进一步改进，所述滑动板的顶边或底边开设有槽口；所述弹性连接部包括滑动板由槽口到侧边的限定部分、以及至少一个由限定部分的侧边向外凸出形成的卡嵌结构，所述卡嵌结构卡入所述齿条的齿隙。
作为本发明的进一步改进，所述支撑架上固定连接有固定板，所述调节槽、档位槽、齿条均形成在固定板上。
作为本发明的进一步改进，所述椅背架上设有前后贯通的通孔；所述升降调节件转动连接在椅背架的正面，所述调节部由升降调节件向后延伸形成，调节部穿过通孔、横向槽或纵向槽并插设在调节槽或档位槽。
作为本发明的进一步改进，所述椅背架的正面具有向前延伸形成的柱体；所述升降调节件具有套环结构，套环结构可转动套接在柱体上。
作为本发明的进一步改进，所述椅背架的正面具有包围住所述升降调节件的围栏结构；所述弹性复位件的两端分别支撑在升降调节件和围栏结构的内壁上。
作为本发明的进一步改进，所述弹性调节件上具有凸出部，所述弹性复位件的一端套接在凸出部上。
作为本发明的进一步改进，所述支撑架具有两个左右对称的纵向支架，所述椅背架具有两个可沿纵向支架上下滑动的纵梁；两个纵向支架上均设有调节槽和档位槽，两个纵梁上均设有升降调节件。
本发明的椅背升降装置，无需另外设置控制开关，调节时用户只需对椅背架施加向上或向下的拉力即可调节升降，操作非常方便实用，与现有技术中采用的升降、滑移机构相比，使整体机构更为精简，并减少了生产加工成本。
下面将通过附图详细描述本发明中优选实施案例，以助于理解本发明的目的和优点，其中：
图1为椅背升降机构的爆炸示意图；
图2为锁定结构的结构示意图；
图3为固定板的结构示意图；
图4为升降调节件的结构示意图；
图5为椅背架的局部结构示意图。
下面根据附图和实施案例对本发明作进一步详细说明。
在本说明书中提到或者可能提到的上、下、左、右、前、后、正面、背面、顶部、底部等方位用语是相对于各附图中所示的构造进行定义的，词语“内”和“外”分别指的是朝向或远离特定部件几何中心的方向它们是相对的概念，因此有可能会根据其所处不同位置、不同使用状态而进行相应地变化。所以，也不应当将这些或者其他的方位用语解释为限制性用语。
参照图1-图5，一种椅背升降机构，包括支撑架1、椅背架4，所述支撑架1的底端和椅子上的椅座后端固定连接，支撑架1由底端向后延伸一段后向上弯折，直至延伸到其顶端，所述椅背架4具有椅背框，用以支撑用户的背部，其滑动连接在支撑架1的正面，并且可以沿支撑架1进行上下移动，调节其高度。
所述支撑架1上设有上下延伸的调节槽22，调节槽22的一侧边连接有多个档位槽21，所述档位槽21向调节槽22的外侧延伸而出并且向下倾斜，倾斜幅度在40°-60°。所述椅背架4设有升降调节件52，所述升降调节件52为长条形结构，其一端转动连接在椅背架4上，使得升降调节件52可以左右摆动，所述升降调节件52具有调节部521，所述调节部521插设在调节槽22或者档位槽21内。所述调节部521插设在某个档位槽21并且抵在该档位槽21的端部时，所述椅背架4就相对于支撑架1固定不动，当用户向上拉动椅背架4时，所述调节部521就由档位槽21的端部向根部滑动，直至滑动到调节槽22内，从而使得所述椅背架4能够沿着支撑架1向上移动。
所述椅背升降架设有弹性复位件51，其作用在升降调节件52上，用于驱使调节部521由调节槽22滑入档位槽21。当调节部521由当前层的档位槽21滑入调节槽22后在弹性复位件51的作用下，调节部521滑入上一层的档位槽21中，使得椅背架4只能向上调节而无法向下调节。用户向上拉动椅背架4时可以多档的高度调节，档位数和档位槽21的数量一致。
所述升降调节件52设置有锁定结构，在调节部521由调节槽22的顶端向下滑动、由调节槽22的底端向上滑动时，锁定结构分别用于将调节部521锁定使其无法左右摆动、将调节部521解锁允许其左右摆动。因此，用户将所述椅背架4调节到最高层的档位后，再向上拉动椅背架4使得调节部521滑入调节槽22并位于调节槽22顶端后，在锁定结构的锁定作用下，调节部521就无法再被弹性复位件51驱使卡入档位槽21，即使得椅背架4可以自由上下移动，将椅背架4向下拉动使得调节部521移动到调节槽22的底端后，在锁定结构的解锁作用下，调节部521恢复左右摆动的能力，使得用户再向上拉动椅背架4时可以重新进行多档调节。
对于锁定结构，其包括滑动板3，所述滑动板3具有横向槽31和纵向槽32。所述滑动板3呈方形形状，其夹持在椅背架4和支撑架1之间，滑动板3滑动连接在支撑架1上并且可沿支撑架1上下滑动。所述横向槽31允许调节部521穿过并且左右摆动，不会干涉到调节部521滑入或滑出档位槽21，即调节部521穿过横向槽31时处于解锁状态。所述纵向槽32连接在横向槽31的底边，使得横向槽31和纵向槽32构成了一个L形的槽型。所述纵向槽32的左右宽度略微大于调节部521，因此所述调节部521由横向槽31滑入纵向槽32时，所述纵向槽32可卡住调节部521使其无法左右摆动，即调节部521位于纵向槽32时处于锁定状态。
所述调节部521由最上层的档位槽21滑入调节槽22并且移动到调节槽22的顶端时，此时调节部521穿过横向槽31抵住横向槽31的顶边。当调节部521沿调节槽22向下移动时，调节部521就由横向槽31滑入纵向槽32内从而处于锁定状态。调节部521移动到调节槽22底端后再向上移动时，调节部521就由纵向槽32滑入横向槽31从而处于解锁状态。
为了使得调节部521处于锁定状态或解锁状态时保持稳定，所述支撑架1上设有两个上下延伸的齿条23；所述滑动板3的左右两侧具有分别和对应齿条23啮合的弹性连接部，所述弹性连接部可产生弹性变形，使得滑动板3可沿支撑架1上下移动。因此，所述调节部521抵住横向槽31的顶边向上移动时，滑动板3才可被带动向上移动，所述调节部521抵住纵向槽32的底边向下移动时，滑动板3才可被带动向下移动，其余情况下，滑动板3通过其弹性连接部和齿条23相啮合无法上下移动，从而可以确保调节部521处于锁定状态、解锁状态时，分别稳定地保持在纵向槽32、横向槽31内。
进一步地，所述滑动板3的顶边或底边开设有槽口333，所述弹性连接部包括滑动板3由槽口333到侧边的限定部分331、以及至少一个由限定部分331的侧边向外凸出形成的卡嵌结构332，所述卡嵌结构332卡入所述齿条23的齿隙。通过在滑动板3开设槽口333，所述弹性连接部的根部和滑动板3一体连接，其本体由根部向外延伸而出，使得弹性连接部可以在左右方向上弯曲变形，所述卡嵌结构332可以从齿条23的齿隙中脱出后再卡入上方或下方的齿隙，从而使得滑动板3可以沿齿条23上下滑动。
再进一步地，所述支撑架1的正面上设有固定板2，固定板2通过紧固件固定在支撑架1上，所述调节槽22、档位槽21、齿条23均形成在固定板2上，使得以上功能结构在结构布局上更为合理，避免影响椅背架4和支撑架1的滑动连接关系，另外通过将调节槽22、档位槽21、齿条23这些功能结构集成在固定板2上，也使得整体结构更为紧凑。
为了使得支撑架1和椅背架4的滑动连接更为紧凑，减少两者之间的间隙，所述椅背架4上设有前后贯通的通孔41，所述升降调节件52转动连接在椅背架4的正面，所述调节部521由升降调节件52向后延伸形成，所述升降调节件52和调节部521为一体结构，调节部521穿过通孔、横向槽31或纵向槽32并插设在调节槽22或档位槽21。
关于所述升降调节件52和椅背架4的转动连接关系，所述椅背架4的正面具有向前延伸形成的柱体42；所述升降调节件52具有套环结构522，套环结构522可转动套接在柱体42上。更为具体地，所述套环结构522形成在升降调节件52的顶端，所述调节部521形成在升降调节件52下部的背面。
所述椅背架4的正面具有包围住所述升降调节件52的围栏结构43，所述围栏结构43的上部包裹住套环结构522，下部在左右方向上具有一定的宽度，允许所述升降调节件52的左右摆动动作。所述弹性复位件51的两端分别支撑在升降调节件52和围栏结构43的内壁上，从而可以对升降调节件52提供稳定的弹力支撑。
再进一步地，为了避免所述弹性复位件51的脱落，也为了确保弹性复位件51能够始终作用在升降调节件52相同的部位，进而能够稳定地驱使升降调节件52复位，所述弹性调节件上具有凸出部523，所述凸出部523呈柱状结构，所述弹性复位件51设置为复位弹簧，其一端套接在凸出部523上。
另外，所述椅背架4正面设有盖板44，所述盖板44固定连接在围栏结构43上，从而和围栏结构43形成了一容纳升降调节件52和弹性复位件51的密闭空间，起到保护两者的作用。
另外，为了使得椅背架4的上下滑动更为稳定，避免出现左右方向上的偏斜，从而造成上下移动时椅背架4被卡住，所述支撑架1具有两个左右对称的纵向支架，在整体结构上支撑架1呈现为分叉式结构，所述椅背架4具有两个可沿纵向支架上下滑动的纵梁，两个纵向支架上均设有调节槽22和档位槽21，两个纵梁上均设有升降调节件52，左右对称的整体结构布置，使得升降动作更为稳定可靠。
最后应说明的是：以上实施案例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施案例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施案例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施案例技术方案的范围。
Claims (10)
- 一种椅背升降机构，包括支撑架、可沿支撑架上下移动的椅背架；其特征在于，所述支撑架上设有上下延伸的调节槽，调节槽的一侧边连接有多个向调节槽的外侧延伸而出并且向下倾斜的档位槽；所述椅背架转动连接有可左右摆动的升降调节件，升降调节件具有插设在调节槽或档位槽的调节部；所述椅背升降架设有弹性复位件，用于驱使调节部由调节槽滑入档位槽；所述升降调节件设有锁定结构，在调节部由调节槽的顶端向下滑动、由调节槽的底端向上滑动时，锁定结构分别用于将调节部锁定使其无法左右摆动、将调节部解锁允许其左右摆动。
- 根据权利要求1所述的椅背升降机构，其特征在于，所述锁定结构包括可沿支撑架上下移动的滑动板，滑动板上具有横向槽和纵向槽；所述横向槽允许调节部穿过并且左右摆动，使得调节部处于解锁状态；所述纵向槽连接在横向槽的底边，所述调节部由横向槽滑入纵向槽时，所述纵向槽可卡住调节部使其无法左右摆动，使得调节部处于锁定状态。
- 根据权利要求2所述的椅背升降机构，其特征在于，所述支撑架上设有两个上下延伸的齿条；所述滑动板的左右两侧具有分别和对应齿条啮合的弹性连接部，所述弹性连接部可产生弹性变形，使得滑动板可沿支撑架上下移动。
- 根据权利要求3所述的椅背升降机构，其特征在于，所述滑动板的顶边或底边开设有槽口；所述弹性连接部包括滑动板由槽口到侧边的限定部分、以及至少一个由限定部分的侧边向外凸出形成的卡嵌结构，所述卡嵌结构卡入所述齿条的齿隙。
- 根据权利要求3所述的椅背升降机构，其特征在于，所述支撑架上固定连接有固定板，所述调节槽、档位槽、齿条均形成在固定板上。
- 根据权利要求2所述的椅背升降机构，其特征在于，所述椅背架上设有前后贯通的通孔；所述升降调节件转动连接在椅背架的正面，所述调节部由升降调节件向后延伸形成，调节部穿过通孔、横向槽或纵向槽并插设在调节槽或档位槽。
- 根据权利要求6所述的椅背升降机构，其特征在于，所述椅背架的正面具有向前延伸形成的柱体；所述升降调节件具有套环结构，套环结构可转动套接在柱体上。
- 根据权利要求6所述的椅背升降机构，其特征在于，所述椅背架的正面具有包围住所述升降调节件的围栏结构；所述弹性复位件的两端分别支撑在升降调节件和围栏结构的内壁上。
- 根据权利要求8所述的椅背升降机构，其特征在于，所述弹性调节件上具有凸出部，所述弹性复位件的一端套接在凸出部上。
- 根据权利要求1-9任一项所述的椅背升降机构，其特征在于，所述支撑架具有两个左右对称的纵向支架，所述椅背架具有两个可沿纵向支架上下滑动的纵梁；两个纵向支架上均设有调节槽和档位槽，两个纵梁上均设有升降调节件。
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| CN209573966U (zh) * | 2018-11-13 | 2019-11-05 | 佛山市科智美家具有限公司 | 一种升降椅背的快速复位结构 |
| CN213720942U (zh) * | 2020-03-10 | 2021-07-20 | 安吉金标家具厂 | 椅背调节架、升降椅托盘和升降椅 |
| CN113229660A (zh) * | 2021-05-25 | 2021-08-10 | 永艺家具股份有限公司 | 一种椅背升降装置 |
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| CN217771853U (zh) * | 2022-04-25 | 2022-11-11 | 浙江瑞尚智能家居有限公司 | 一种椅背升降机构 |
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| US5685609A (en) * | 1995-03-21 | 1997-11-11 | Miotto International Company | Mechanism to adjust the height of a back support of a chair |
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| CN213720942U (zh) * | 2020-03-10 | 2021-07-20 | 安吉金标家具厂 | 椅背调节架、升降椅托盘和升降椅 |
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| CN217771853U (zh) * | 2022-04-25 | 2022-11-11 | 浙江瑞尚智能家居有限公司 | 一种椅背升降机构 |
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