WO2020014810A1 - 一种手把折叠机构和使用该折叠机构的三折手把及其推车 - Google Patents

一种手把折叠机构和使用该折叠机构的三折手把及其推车 Download PDF

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Publication number
WO2020014810A1
WO2020014810A1 PCT/CN2018/095751 CN2018095751W WO2020014810A1 WO 2020014810 A1 WO2020014810 A1 WO 2020014810A1 CN 2018095751 W CN2018095751 W CN 2018095751W WO 2020014810 A1 WO2020014810 A1 WO 2020014810A1
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WO
WIPO (PCT)
Prior art keywords
component
housing
piece
handle
unlocking
Prior art date
Application number
PCT/CN2018/095751
Other languages
English (en)
French (fr)
Inventor
范明峰
张德全
胡守斌
Original Assignee
中山市乐瑞婴童用品有限公司
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
Application filed by 中山市乐瑞婴童用品有限公司 filed Critical 中山市乐瑞婴童用品有限公司
Priority to US17/042,961 priority Critical patent/US11186306B2/en
Priority to CN201880002798.XA priority patent/CN109789888B/zh
Priority to EP18926998.8A priority patent/EP3747731B1/en
Priority to PCT/CN2018/095751 priority patent/WO2020014810A1/zh
Publication of WO2020014810A1 publication Critical patent/WO2020014810A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/20—Handle bars; Handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/02—Hand-propelled vehicles or sledges being foldable or dismountable when not in use foldable widthwise
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/20—Catches; Locking or releasing an articulation
    • B62B2205/22—Catches; Locking or releasing an articulation remotely controlled, e.g. from the handlebar

Definitions

  • the invention relates to a portable cart, in particular to a handle folding mechanism, a tri-fold handle using the folding mechanism and a cart having the tri-fold handle.
  • the portable carts for various purposes are generally reduced in size by folding in a horizontal direction (that is, width).
  • a horizontal direction that is, width
  • the handles of the carts need to be folded together with the body. This situation often occurs on the handles that cross the frame. At present, such handles can be passed through the horizontal folding mechanism according to actual needs. Realize two folds or three folds to minimize its volume.
  • the existing horizontal folding mechanism of the handlebar mostly adopts a gear pair, which results in a large number of components of the horizontal folding mechanism, a complicated structure, and a long assembly time.
  • the first object of the present invention is to provide a handle folding mechanism with simple structure, low cost, convenient assembly and use, and strong structural stability and safety.
  • a second object of the present invention is to provide a tri-fold handle using the handle folding mechanism.
  • a third object of the present invention is to provide a cart having the above-mentioned three-fold handle.
  • a handlebar folding mechanism which is characterized in that it includes an intermediate component and a pair of connecting components hinged at two ends of the intermediate component, respectively, and the intermediate component is mainly made of a tube
  • the housing is composed of a pressing block and an unlocking piece.
  • the rear part of the pressing block extends through the front wall surface of the housing into the housing and is movably installed so that the pressing block can move forward and backward.
  • the connection assembly is mainly composed of a tubular casing and an elastic restoring member
  • the locking piece is slidably installed in the housing in the axial direction.
  • the front end of the locking piece penetrates into the end portion of the housing in a lateral direction, and the unlocking piece is fixed in the housing.
  • the fixing part is provided with a free end protruding between the rear end of the pressing block and the front end of the engaging piece.
  • the pressing block is pushed backward, and the free end of the unlocking piece is pushed by the pressing piece to cause the unlocking piece to elastically deform and unlock.
  • the projection of the tablet on the horizontal plane gradually increases, and the engaging piece is pushed out of the housing in the lateral direction to unlock it.
  • Movable intermediate folded handlebar assembly can be achieved by pulling back the handle so that the intermediate assembly deployed engaging an elastic restoring force of the sheet is pushed into the lock housing again achieved.
  • the invention adopts the unlocking piece to achieve the function of unlocking the handlebar, and automatically returns the pressure block under the action of its own elastic restoring force, reduces the number of parts, has a simple structure and low cost, and has a simple linkage and cooperation relationship between the various components. Easy to assemble.
  • the operation of unlocking and locking, and folding is simple, safe, and easy to use, which can reduce the volume of the handlebar to the greatest extent.
  • the overall structure of the invention has strong stability and security.
  • the intermediate assembly further includes a button having an elastic restoring member, the button can be laterally installed on the rear wall of the housing, and there is a limit between the button and the pressing block that can be moved with the button.
  • the button Position the pressure block or the limit mechanism to release the limit, toggle the button to release the limit mechanism's limit on the pressure block, and at the same time push the pressure block backward to unlock the operation; or in the locked state, the toggle button passes the limit
  • the mechanism limits the pressure block, which can prevent the user from wrongly operating the pressure block and causing the car to be retracted, which will affect the safety.
  • a front portion of the front end surface of the engaging piece is an arc surface or an inclined surface, and a rear portion thereof is an inclined surface.
  • the curved portion or the inclined surface of the front portion is used to apply the unlocking piece to the engaging portion.
  • the force on the piece is decomposed to form a lateral component force to push the engaging piece out of the housing to unlock it.
  • the sloped part of the rear part is used to slide the engaging piece flexibly when retracting, and it is easy to come out of the housing of the middle component.
  • the housing of the connection assembly has a sliding groove for mounting an engaging piece therein.
  • One end of the elastic restoring member of the engaging piece is fixed to the tail of the sliding groove, and the other end touches the top of the elastic piece.
  • the hinge part of the intermediate component and the connecting component has a hinge shaft; a front part of the engaging piece is provided with a long hole, and the hinge shaft is installed in the long hole and The end of the housing of the intermediate component and the end of the housing of the connection component are hinged together, and the hinge shaft can relatively slide in the elongated hole as the engaging piece moves.
  • the unlocking piece is ⁇ -shaped, the middle portion of the unlocking piece is a fixed portion, the pressing block is a hollow housing with an opening at the rear end surface, and the upper mouth edge and / Or the lower mouth edge is provided with a top post protruding backward, the button is mainly composed of a dial located outside the housing and a protruding post located forward in the housing, and the protruding post can touch the top as the button moves.
  • the upper limit pressure block of the top column or the disengagement to cancel the limit constitutes the limit mechanism; the opposite sides of the opening in the lateral direction are inclined surfaces, and the surfaces of the two wings of the unlocking piece are adapted to the inclined surface and are locked.
  • the ends of the two wings of the unlocking piece are in contact with the inclined surface, and during the elastic deformation of the unlocking piece, the two wings slide along the inclined surface.
  • the front end surface of the toggle portion of the button is a block body located in the housing of the intermediate component, the protrusion is provided on the front surface of the toggle portion, and the button The elastic recovery member is located between the front end surface of the toggle portion and the inner end surface of the casing.
  • the housing of the intermediate component is mainly formed by butt joint between an upper case and a lower case, and the upper and lower surfaces of the rear part of the pressing block are respectively provided with corresponding upper and lower lateral limits.
  • a convex strip is provided on the inner top surface of the upper casing and the inner bottom surface of the lower casing with a lateral limiting slot for restraining the limiting protruding strip, and the limiting protruding strip can be in the limiting slot.
  • the back and forth movement realizes the movable installation of the pressure block.
  • the second object of the present invention is achieved by the following technical measures: a three-fold handle using the handle-folding mechanism described above, which is characterized in that it includes the intermediate component, the connecting component, and a pair of fixings
  • the front end of the pair of fixing components is hinged with the tail end of a connecting component
  • the fixing component is mainly composed of a pipe body and a retracting steel wire
  • the retracting steel wire passes forward through the pipe connecting component.
  • the rear end of the casing is fixed, so that after unlocking between the intermediate component and the connecting component, the intermediate component is pushed forward, and the connecting component drives the retracting steel rope around the hinge of the connecting component and the fixing component to make the retracting steel rope effective.
  • the distance is reduced to drive the frame engaging structure to unlock, thereby unlocking between the connection component and the fixed component, and achieving three-folding of the handlebar at the same time as the car is retracted.
  • the outer shell of the intermediate component according to the present invention is mainly formed by the butt joint between the upper case and the lower case.
  • the upper and lower surfaces of the rear part of the pressing block are respectively provided with corresponding upper and lower lateral limiting protrusions.
  • the inner top surface of the casing and the inner bottom surface of the lower casing are respectively provided with a lateral limit card slot for restraining the limit protruding strips, and the limit protruding strips can be moved forward and backward in the limit card slots to realize the pressing of the blocks. Active installation.
  • the lower surface of the end of the upper case of the intermediate component is a platform
  • the upper surface of the end of the lower case of the intermediate component is a platform.
  • a gap is formed between the two platforms, and the connection component
  • the front end of the connecting component is inserted into the gap and fixed by the hinge shaft; the tail end of the connection component and the front end of the fixing component are both curved forward, and the tail end of the connection component and the fixing
  • the front ends of the components have corresponding notches.
  • the notches have a matching plane and are fixed by a hinge shaft.
  • a cart with the three-fold handle characterized in that it includes a frame, a seat mounted on the frame and wheels, and the cart
  • the frame includes a frame main body, a retracting engagement structure provided on the frame main body, and the tri-fold handle, a rear end of a fixing component of the tri-fold handle is connected to the frame main body, and the retracting steel
  • the tail end of the rope penetrates into the body of the frame and is connected with the frame engaging structure.
  • the present invention has the following significant effects:
  • the unlocking piece is used to achieve the bending function of the unlocking handle, and the pressure block is automatically returned under the action of its own elastic restoring force, which reduces the number of parts, has a simple structure, low cost, and a coordinated cooperation relationship between the assembled components. Simple and convenient for assembly, unlocking and locking, and folding operations are simple, safe and easy to use.
  • the unlocking piece and the engaging piece of the present invention are in a separate structure, and the respective design spaces of the unlocking piece and the engaging piece are reserved, and the length of the engaging piece protruding into the tubular casing when the locking piece is in a locked state is consistent with stability and safety.
  • the length of the engaging piece extending into the connecting component will not affect the overall size of the unlocking piece, and the horizontal size of the unlocking piece will not be affected, so it will not affect the horizontal direction after the handle is folded. size.
  • the two wings of the unlocking piece used in the present invention are not only components that directly unlock the engaging piece, but also have the function of resetting elastic deformation, which further simplifies the structure of the entire folding mechanism; and the two wings of the unlocking piece are facing the engaging piece.
  • deformation occurs simultaneously in the lateral direction and the front-to-back direction, which avoids that the unlocking piece must have a large space for movement in the direction due to the large deformation in a single direction.
  • the present invention limits or releases the pressure block by pushing a button, which can prevent the user from misoperating the pressure block and causing the car to be retracted, thereby affecting safety.
  • the unlocking and locking and folding operation mechanism of the present invention runs smoothly and has strong overall structural stability and security, which is suitable for widespread promotion and application.
  • FIG. 1 is a schematic perspective view of the three-fold handle of the present invention when it is locked (expanded);
  • FIG. 2 is a schematic diagram of an explosion structure of a tri-fold handle of the present invention.
  • FIG. 3 is a schematic view of the three-dimensional handle of the present invention when it is locked (unfolded) (with the upper case of the intermediate component removed);
  • Figure 4 is a top view of a tri-fold handle of the present invention.
  • FIG. 5 is a sectional view taken along line B-B in FIG. 4;
  • FIG. 6 is a sectional view taken along the line C-C in FIG. 4;
  • FIG. 7 is a sectional view taken along the line D-D in FIG. 4;
  • FIG. 8 is a side view of the tri-fold handle of the present invention when it is locked (expanded);
  • Fig. 9 is a sectional view taken along line E-E in Fig. 8;
  • FIG. 10 is a top view of the tri-fold handle of the present invention in a locked state (the upper case of the intermediate component is removed, and the pressure block is in a limit state);
  • FIG. 11 is a top view of the tri-fold handle of the present invention in a locked state (removing the upper housing of the intermediate component and removing the restriction on the pressure block);
  • FIG. 12 is a top view of the tri-fold handle of the present invention (the upper case of the intermediate component is removed, the unlocking piece undergoes elastic deformation, and the engaging piece is pushed out of the housing of the intermediate component);
  • FIG. 13 is a bottom view of the tri-fold handle of the present invention (the lower case of the intermediate component is removed, and the pressure block is in a limit state);
  • FIG. 14 is a top view of the middle assembly and a part of the connection assembly of the three-fold handle of the present invention (removing the upper casing of the middle assembly and removing the restriction on the pressure block);
  • FIG. 15 is a plan view of the middle assembly and a part of the connection assembly of the three-fold handle of the present invention (the upper case of the middle assembly is removed, the unlocking piece is elastically deformed, and the engaging piece is pushed out of the housing of the middle assembly);
  • 16 is a perspective view of the three-fold handle of the present invention in a folded state
  • FIG. 17 is a perspective structural diagram of the tri-fold handle of the present invention in a folded state (removing the lower case of the middle assembly); FIG.
  • FIG. 18 is a top view of a tri-fold handle of the present invention in a folded state
  • 19 is a side view of the folded state of the tri-fold handle of the present invention.
  • Fig. 20 is a sectional view taken along the line A-A in Fig. 19.
  • the handle folding mechanism includes an intermediate component 1 and a pair of connecting components 2 hinged at both ends of the intermediate component 1.
  • the intermediate component 1 is mainly composed of a tubular casing 11 and a pressing block 12.
  • the button 14 with the elastic restoring part and the unlocking piece 13 are composed.
  • the tubular casing 11 is formed by butting an upper casing 17 and a lower casing 18.
  • the rear part of the pressing block 12 extends through the front wall surface of the housing 11, specifically, a long gap is provided on the bottom edge of the front wall surface of the upper case 17 and the front wall surface of the lower case 18.
  • a mounting hole is formed for the pressing block to pass through.
  • the upper and / or lower surfaces of the rear part of the pressing block 12 are respectively provided with upper and lower corresponding lateral limiting protrusions 19, and on the inner top surface of the upper case 17 and below.
  • the inner bottom surface of the housing 18 is respectively provided with a lateral limit clamping slot 20 for restraining the limit protruding strip, and the limit protruding strip 19 can be moved forward and backward in the limit latch slot 20.
  • the pressing block 12 is a hollow shell with an opening at the rear end face. In the opening, the upper and lower mouth edges of the upper and lower shells 17, 18 are provided with a top post 49 protruding rearward. Grooves 47 and 23 are respectively provided on both sides. The opposite edges of the opening in the lateral direction are inclined surfaces 46, respectively.
  • the button 14 can be laterally installed on the rear wall surface of the housing 11, specifically, a long gap is provided on the bottom edge of the rear wall surface of the upper case 17 and the rear wall surface of the lower case 18.
  • the button 14 is mainly composed of a toggle portion 45 located outside the housing 11 and two protruding posts 24 spaced apart from each other in the up-down direction. As the button 14 moves, it touches the corresponding top post 49 to limit the pressure block 12 or release the top post to cancel the limit position of the pressure block 12.
  • the front end surface 40 of the toggle portion of the push button 14 is a block-shaped body located in the housing.
  • the convex post 24 is provided on the front end surface 40 of the toggle portion.
  • the elastic restoring member of the push button 14 uses a pair of springs 25, each protruding One side of the post 24 is provided with a transverse socket post 44. One end of the pair of springs 25 is respectively sleeved on the corresponding socket post 44, and the other end abuts against the inner end surface of the housing 11.
  • the unlocking piece 13 is U-shaped, and is made of plastic material, and is located in a space separated between two protruding posts, so that the two protruding posts will not affect the unlocking piece when moving with the button.
  • the middle part of the unlocking piece 13 is a fixing part, and has a ring sleeve 26.
  • a fixing post 27 is provided on the lower case 18 of the housing.
  • the ring cover 26 is sleeved on the fixing post 27 and is fixed by a fixing member.
  • the two wings of the unlocking piece 13 are two free ends, and the surfaces of the two wings are adapted to the inclined surface 46 to gradually press the ends of the unlocking piece 13 on the inclined surface 46 of the pressure block 12 to realize the unlocking process.
  • the inclined surface 46 is applied to the unlocking piece 13 The pressure at the ends of the wings is small.
  • the connection assembly 2 is mainly composed of a tubular casing 21 and an engaging piece 22 having an elastic restoring member.
  • the casing 21 has a sliding groove for installing the engaging piece 22, and the engaging piece 22 can slide axially in the sliding groove.
  • the deeper sliding groove can also prevent plastic from shrinking due to uneven thickness of the plastic.
  • the front part of the front end face of the engaging piece 22 is an arc surface 30 or an inclined surface.
  • the elastic restoring member of the engaging piece 22 uses a spring. 28.
  • the tail of the sliding groove is provided with a mounting hole 29 for axially mounting the spring 28.
  • the front end of the spring 28 abuts on the tail of the engaging piece 22. In the locked state, the front end of the engaging piece 22 penetrates into the end portion of the housing 11 in the lateral direction.
  • the convex post 24 touches the upper post 49 to limit the pressure block 12, see FIGS. 10 and 13; toggle the button 14 to release the convex post 24 from the upper post 49 and release the limit of the pressure block 12.
  • the function is shown in FIGS. 11 and 14.
  • the pressing block 12 is pushed backward, the fixing part of the unlocking piece 13 is located in the groove 47 of the pressing block 12, and the protruding post 24 is located in the groove 23.
  • the two wings of the unlocking piece 13 are pushed by the pressing block 12 to elastically deform the unlocking piece 13. In this process, the two wings of the unlocking piece 13 slide along the inclined surface 46, the angle between the two wings increases, and the unlocking piece 13 is on a horizontal surface.
  • the projection gradually increases and directly presses the arcuate surface 30 of the engaging piece 22.
  • the force exerted on the engaging piece 22 by the unlocking piece 13 forms a lateral component force through the curved surface to push the engaging piece 22 out of the housing.
  • 11 to achieve unlocking see Figures 12 and 15; the use of buttons to limit the pressure block can prevent users from operating the pressure block incorrectly, causing the car to be transported and affecting safety.
  • the engaging piece 22 returns to its original shape under the elastic restoring force of the spring 28.
  • the pressure piece 12 returns to the original shape under the elastic restoring force of the unlocking piece 13, and the button 14 returns under the elastic restoring force of the spring 25.
  • push the intermediate component 1 forward to realize the handle folding see FIGS. 16-20; by pulling the intermediate component 1 back, the engaging piece 22 is pushed into the housing under the elastic restoring force of the spring 28 when the handle is deployed. Locked again in 11.
  • the rear part of the engaging piece 22 is an inclined surface 31.
  • the inclined surface 31 is used to slide the engaging piece 22 flexibly when the vehicle is retracted, and is easy to be released from the housing 11 of the intermediate component 1.
  • the hinge part of the intermediate component 1 and the connecting component 2 has a hinge shaft 32, and the front part of the engaging piece 22 is provided with an elongated hole 33.
  • the hinge shaft 32 is installed in the elongated hole 33 and the housing 11 of the intermediate component 1
  • the end portion is hinged with the end portion of the housing 21 of the connection assembly 2, and the hinge shaft 32 can slide relative to the elongated hole as the engaging piece 22 moves.
  • the lower surface of the end of the upper housing 17 of the intermediate component 1 is a platform, and the upper surface of the end of the lower housing 18 of the intermediate component 1 is a platform.
  • a gap is formed between the two platforms.
  • the front end of the connecting component 2 is a flat block 39 inserted into the platform. In the gap, it is fixed by the hinge shaft 32.
  • a three-fold handle 48 using the handle-folding mechanism described above includes an intermediate component 1, a connection component 2, and a pair of fixing components 3.
  • the front ends of the pair of fixing components 3 are hinged to the tail ends of one connection component 2, respectively.
  • the fixing component 3 is mainly composed of a pipe body 35 and a retracting steel rope 36.
  • the retracting steel rope 36 passes forward through the pipe body 35 and extends along the outer side of the front end of the pipe body 35 into the tail end of the housing 21 of the connection component 2 and is fixed at On the outer side of the casing 21, after unlocking between the intermediate component 1 and the connecting component 2, the intermediate component 1 is pushed forward, and the connecting component 2 drives the take-up steel rope 36 to rotate around the hinged portion of the connecting component 2 and the fixing component 3. So that the effective distance of the retracting steel wire 36 is reduced to drive the frame engaging structure to unlock (the frame engaging structure is the prior art), so as to unlock the connecting component 2 and the fixing component 3, Achieve three folds of the handle.
  • the rear end of the connecting component 2 is an arc curved forward, and the lower surface thereof has a lower notch 41.
  • the top surface of the lower notch 41 is a flat surface
  • the front end of the fixing component 3 is an arc curved forward.
  • the bottom surface of the upper notch 42 is a plane.
  • the plane of the upper notch 42 and the plane of the lower notch 41 are bonded together and fixed by the hinge shaft 43.
  • a cart with a three-fold handle 48 includes a frame, a seat and wheels mounted on the frame, and the frame includes a frame body, a retracting and engaging structure provided on the frame body, and a three-fold handle.
  • the rear end of the fixed component of the 48 and three-fold handle 48 is connected to the frame main body, and the rear end of the retracting steel wire 36 penetrates into the frame main body and is connected to the frame engaging structure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
  • Handcart (AREA)

Abstract

一种手把折叠机构和使用该折叠机构的三折手把（48）及其推车。该折叠机构包括中间组件（1）和一对连接组件（2），中间组件（1）包括管状外壳（11）、压块（12）和解锁片（13），压块（12）的后部穿过外壳（11）的前壁面伸入外壳（11）中并可前后移动，连接组件（2）包括管状壳体（21）和卡合片（22），卡合片（22）滑动安装在壳体（21）内，锁定状态下，卡合片（22）的前端穿入外壳（11）中，解锁片（13）具有固定部，该固定部设有伸出至压块（12）后端与卡合片（22）前端之间的自由端。

Description

一种手把折叠机构和使用该折叠机构的三折手把及其推车 技术领域
本发明涉及一种轻便型推车，具体涉及一种手把折叠机构和使用该折叠机构三折手把及具有该三折手把的推车。
背景技术
在日常生活中使用轻便型推车时，为了便于携带和收藏，达到节省存放空间的目的，各种用途的轻便型推车一般都会采用在横向(即宽度)上折叠的方式缩小体积。有的推车在折叠时，推车的手把会随车身一起需要进行自身折叠，这种情况多出现在横跨车架的手把上，目前这种手把可根据实际需要通过横向折叠机构实现二折叠或者三折叠，以最大程度减小其体积。
然而，现有手把的横向折叠机构多采用齿轮副，这导致横向折叠机构组件数量多、结构复杂、组装需时较长。
发明内容
本发明的第一个目的在于提供一种结构简单、成本低、方便组装和使用、结构稳定性和安全性强的手把折叠机构。
本发明的第二个目的在于提供一种使用上述手把折叠机构的三折手把。
本发明的第三个目的在于提供一种具有上述三折手把的推车。
本发明的第一个目的通过以下的技术措施来实现：一种手把折叠机构，其特征在于：它包括中间组件和一对分别铰接在中间组件两端的连接组件，所述中间组件主要由管状外壳、压块和解锁片组成，所述压块的后部穿过外壳的前壁面伸入外壳中并活动安装使压块可前后移动，所述连接组件主要由管状壳体和具有弹性回复部件的卡合片组成，所述卡合片沿轴向可滑动安装在壳体内，在锁定状态下，卡合片的前端沿横向穿入外壳的端部中，所述解锁片具有固定在外壳内的固定部，该固定部设有伸出至压块后端与卡合片前端之间的自由端，向后推动压块，解锁片的自由端被压块推动使解锁片发生弹性形变，解锁片在水平面上的投影逐渐增长而将卡合片沿横向方向推出外壳实现解锁，撤销外力前后，卡合片和压块分别在弹性回复力作用下回复原状，再向前推动中间组件即可实现手把折叠，通过回拉中间组件使手把展开时卡合片在弹性回复力作用下被推入外壳中实现再次锁定。
本发明采用解锁片达到解锁手把折弯功能，并在自身弹性回复力作用下使压块自动 回位，减少了零件数量，组成结构简单、成本低，各组成部件之间的联动配合关系简单、方便组装。解锁和锁定以及折叠操作简单、安全，使用方便，可最大程度地减小手把体积，而且，本发明的整体结构稳定性和安全性强。
作为本发明的一种改进，所述中间组件还包括具有弹性回复部件的按钮，所述按钮可横向拨动安装在外壳的后壁面上，按钮与所述压块之间具有可随按钮移动限位压块或解除限位的限位机构，拨动按钮解除限位机构对压块的限位作用，同时向后推动压块，进行解锁操作；或在锁定状态下，拨动按钮通过限位机构限位压块，可防止用户对压块进行误操作造成收车以致影响安全。
作为本发明的一种实施方式，所述卡合片前端面的前部分为弧形面或斜面，且其后部分为斜面，前部分的弧形面或斜面用于将解锁片施加在卡合片上的力分解形成一个横向的分力而将卡合片推出外壳实现解锁，后部分的斜面用于收车时卡合片滑动灵活，易于从中间组件的壳体中脱出。
作为本发明的一种实施方式，所述连接组件的壳体内具有用于安装卡合片的滑动槽，所述卡合片的弹性回复部件一端固定在该滑动槽的尾部，另一端顶触在卡合片的尾端上；所述中间组件和连接组件的铰接部具有铰接轴，所述卡合片的前部设有长条形孔，所述铰接轴安装在该长条形孔内并将中间组件的外壳端部和连接组件的壳体端部铰接在一起，所述铰接轴可随着卡合片移动而在长条形孔内相对滑动。
作为本发明的一种实施方式，所述解锁片为∧形，所述解锁片的中部为固定部，所述压块为后端面具有开口的中空壳体，在该开口中上口沿和/或下口沿上设有向后伸出的顶柱，所述按钮主要由位于外壳外的拨动部和位于外壳内向前伸出的凸柱组成，凸柱可随按钮移动而顶触在顶柱上限位压块或者脱离以撤销限位构成所述限位机构；该开口在横向方向上相对的两侧口沿分别为斜面，解锁片两翼的表面与该斜面相适配，在锁定状态下，解锁片两翼的端部分别与斜面相接触，且在解锁片发生弹性形变的过程中，两翼沿着斜面滑动。
作为本发明的一种实施方式，所述按钮的拨动部的前端面为一位于中间组件外壳内的块状体，所述凸柱设置在该拨动部的前端面上，且所述按钮的弹性回复部件位于拨动部的前端面与外壳的内端面之间。
作为本发明的一种实施方式，所述中间组件的外壳主要由上壳体和下壳体对接而成，在所述压块的后部上表面和下表面分别设有上下对应的横向限位凸条，在所述上壳体的 内顶面上和下壳体的内底面上分别设有用于约束限位凸条的横向限位卡槽，所述限位凸条可在限位卡槽中前后移动实现压块的活动安装。
本发明的第二个目的通过以下的技术措施来实现：一种使用上述手把折叠机构的三折手把，其特征在于：它包括所述的中间组件、所述的连接组件和一对固定组件，该对固定组件的前端分别与一个连接组件的尾端相铰接，所述固定组件主要由管体和收车钢绳组成，所述收车钢绳向前穿过所述管体连接组件的壳体尾端固定，以便在中间组件与连接组件之间解锁后，向前推动中间组件，连接组件带动收车钢绳围绕连接组件与固定组件的铰接部转动，使收车钢绳的有效距离变小从而带动车架卡合结构解锁，进而实现连接组件和固定组件之间解锁，在收车的同时实现手把的三折叠。
本发明所述中间组件的外壳主要由上壳体和下壳体对接而成，在所述压块的后部上表面和下表面分别设有上下对应的横向限位凸条，在所述上壳体的内顶面上和下壳体的内底面上分别设有用于约束限位凸条的横向限位卡槽，所述限位凸条可在限位卡槽中前后移动实现压块的活动安装。
作为本发明的一种实施方式，所述中间组件上壳体的端部下表面为平台，所述中间组件下壳体的端部上表面为平台，该两平台之间形成间隙，所述连接组件的前端为扁平块状体插入该间隙中并由铰接轴固定；所述连接组件的尾端和固定组件的前端均为向前弯曲的弧形，且所述连接组件的尾端和所述固定组件的前端分别具有相适配的缺口，缺口具有相贴合的平面并通过铰接轴固定，在中间组件与连接组件之间锁定时，连接组件的尾端和固定组件的前端呈圆弧过渡，所述连接组件和固定组件的缺口相配合为解锁后二者之间弯折提供转动空间。
本发明的第三个目的通过以下的技术措施来实现：一种具有所述三折手把的推车，其特征在于：它包括车架、安装在车架上的座位和车轮，所述车架包括车架主体、设于车架主体上的收车卡合结构和所述的三折手把，所述三折手把的固定组件的尾端与车架主体相连，所述收车钢绳的尾端穿入车架主体内与所述车架卡合结构相连。
与现有技术相比，本发明具有如下显著的效果：
⑴本发明采用解锁片达到解锁手把折弯功能，并在自身弹性回复力作用下使压块自动回位，减少了零件数量，组成结构简单、成本低，各组装部件之间的联动配合关系简单、方便组装，解锁和锁定以及折叠操作简单、安全，使用方便。
⑵本发明的卡合片在锁定状态时，前端部完全伸入管状外壳中，保证了锁定状态下 手把的稳定性和安全性。
⑶本发明的解锁片与卡合片为分体结构，保留了解锁片以及卡合片各自的设计空间，在保证卡合片在锁定状态时伸入管状外壳的长度符合稳定性和安全性的前提下，卡合片伸入连接组件的长度在根据具体的情况加长的情况下，不会影响解锁片的整体尺寸，尤其不会影响解锁片的横向尺寸，因此不会影响手把折叠后横向尺寸。
⑷本发明采用的解锁片的两翼不仅为直接对卡合片进行解锁的部件，还同时具有复位的弹性变形的性能，进一步简化了整个折叠机构的结构；而且解锁片的两翼在对卡合片施加作用时，在横向和前后向方向同时发生形变，避免了解锁片由于在单一方向的较大的形变而须在对该方向的上预留较大的活动空间。
⑸本发明通过拨动按钮对压块进行限位或者解除限位，可防止用户对压块进行误操作造成收车以致影响安全。
⑹本发明的解锁和锁定以及折叠操作机构运行平稳，整体结构稳定性和安全性强，适于广泛推广和适用。
附图说明
下面结合附图和具体实施例对本发明作进一步的详细说明。
图1是本发明三折手把呈锁定状态时(展开)的立体结构示意图；
图2是本发明三折手把的爆炸结构示意图；
图3是本发明三折手把呈锁定状态时(展开)的立体结构示意图(卸除中间组件的上壳体)；
图4是本发明三折手把的俯视图；
图5是沿图4中B-B线剖面图；
图6是沿图4中C-C线剖面图；
图7是沿图4中D-D线剖面图；
图8是本发明三折手把呈锁定状态时(展开)的侧视图；
图9是沿图8中E-E线剖面图；
图10是本发明三折手把为锁定状态的俯视图(卸除中间组件的上壳体，且压块处于限位状态)；
图11是本发明三折手把为锁定状态的俯视图(卸除中间组件的上壳体，且撤销对压块的限位)；
图12是本发明三折手把的俯视图(卸除中间组件的上壳体，解锁片发生弹性形变，将卡合片推出中间组件的外壳)；
图13是本发明三折手把的仰视图(卸除中间组件的下壳体，且压块处于限位状态)；
图14是本发明三折手把的中间组件和部分连接组件的俯视图(卸除中间组件的上壳体，且撤销对压块的限位)；
图15是本发明三折手把的中间组件和部分连接组件的俯视图(卸除中间组件的上壳体，解锁片发生弹性形变，将卡合片推出中间组件的外壳)；
图16是本发明三折手把为折叠状态的立体结构示意图；
图17是本发明三折手把为折叠状态的立体结构示意图(卸除中间组件的下壳体)；
图18是本发明三折手把为折叠状态的俯视图；
图19是本发明三折手把为折叠状态的侧视图；
图20是沿图19中A-A线剖视图。
具体实施方式
如图1～20所示，是本发明一种手把折叠机构，它包括中间组件1和一对分别铰接在中间组件1两端的连接组件2，中间组件1主要由管状外壳11、压块12、具有弹性回复部件的按钮14和解锁片13组成。
管状外壳11由上壳体17和下壳体18对接而成。压块12的后部穿过外壳11的前壁面伸入其中，具体是在上壳体17的前壁面底沿和下壳体18的前壁面上沿设有长形缺口，两缺口对合后形成用于压块穿入的安装孔，在压块12的后部上表面和/或下表面分别设有上下对应的横向限位凸条19，在上壳体17的内顶面上和下壳体18的内底面上分别设有用于约束限位凸条的横向限位卡槽20，限位凸条19可在限位卡槽20中前后移动。压块12为后端面具有开口的中空壳体，在该开口中对应上、下壳体17、18的上、下口沿上设有向后伸出的顶柱49，在顶柱49的两侧分别设有凹槽47、23。该开口在横向方向上相对的两侧口沿分别为斜面46。
按钮14可横向拨动安装在外壳11的后壁面上，具体是在上壳体17的后壁面底沿和下壳体18的后壁面上沿设有长形缺口，两缺口对合后形成用于按钮安装的安装孔，按钮14主要由位于外壳11外的拨动部45和位于外壳11内向前伸出的两根在上下方向上相互隔离开的凸柱24组成，每根凸柱24可随按钮14移动而顶触在对应的顶柱49上以对压块12进行限位或者脱离顶柱以撤销对压块12的限位。按钮14的拨动部的前端 面40为一位于外壳内的块状体，凸柱24设置在该拨动部的前端面40上，按钮14的弹性回复部件采用一对弹簧25，每根凸柱24的一侧面分别具有一横向的套接柱44，该对弹簧25的一端分别套于对应的套接柱44上，另一端顶触在外壳11的内端面上。
解锁片13为∧形，采用塑料材质，位于两根凸柱之间分隔开的空隙中，以使两凸柱在随按钮移动时也不会对解锁片产生影响。解锁片13的中部为固定部，具有一环套26，在外壳的下壳体18上设有固定柱27，环套26套在固定柱27上由固定件固定。解锁片13两翼即为两个自由端，两翼的表面与斜面46相适配，以在压块12的斜面46逐渐压迫解锁片13两翼的端部实现解锁过程中，斜面46施加在解锁片13两翼端部的压强较小。
连接组件2主要由管状壳体21和具有弹性回复部件的卡合片22组成，壳体21内具有用于安装卡合片22的滑动槽，卡合片22可在滑动槽中沿轴向滑动，深度较大的滑动槽也可以起到防止塑料因胶厚不均而产生缩水现象，卡合片22前端面的前部分为弧形面30或斜面，卡合片22的弹性回复部件采用弹簧28，滑动槽的尾部设有用于轴向安装弹簧28的安装孔29，弹簧28的前端顶触在卡合片22的尾端上。在锁定状态下，卡合片22的前端沿横向穿入外壳11的端部中。
在锁定状态下，凸柱24顶触住顶柱49，对压块12进行限位，参见图10和13；拨动按钮14使凸柱24脱离顶柱49，解除对压块12的限位作用，参见图11和14；同时向后推动压块12，解锁片13的固定部位于压块12的凹槽47中，而凸柱24位于凹槽23中。解锁片13的两翼被压块12推动使解锁片13发生弹性形变，在此过程中，解锁片13的两翼沿着斜面46滑动，两翼之间的夹角增大，且解锁片13在水平面上的投影逐渐增长而直接挤压卡合片22的弧形面30，此时解锁片13施加在卡合片22上的力经弧形面形成一个横向的分力而将卡合片22推出外壳11实现解锁，参见图12和15；采用按钮对压块进行限位，可防止用户对压块进行误操作造成收车以致影响安全。卡合片22在弹簧28的弹性回复力作用下回复原状，撤销外力作用后，压块12在解锁片13的弹性回复力作用下回复原状，而按钮14在弹簧25的弹性回复力作用下回复原状，再向前推动中间组件1即可实现手把折叠，参见图16～20；通过回拉中间组件1使手把展开时卡合片22在弹簧28的弹性回复力作用下被推入外壳11中实现再次锁定。
卡合片22后部分为斜面31，该斜面31用于收车时卡合片22滑动灵活，易于从中间组件1的壳体11中脱出。
中间组件1和连接组件2的铰接部具有铰接轴32，卡合片22的前部设有长条形孔33，铰接轴32安装在该长条形孔33内并将中间组件1的外壳11端部和连接组件2的壳体21端部铰接在一起，铰接轴32可随着卡合片22移动而在长条形孔内相对滑动。
中间组件1上壳体17的端部下表面为平台，中间组件1下壳体18的端部上表面为平台，该两平台之间形成间隙，连接组件2的前端为扁平块状体39插入该间隙中并由铰接轴32固定。
一种使用上述手把折叠机构的三折手把48，它包括中间组件1、连接组件2和一对固定组件3，该对固定组件3的前端分别与一个连接组件2的尾端相铰接，固定组件3主要由管体35和收车钢绳36组成，收车钢绳36向前穿过管体35并沿管体35前端外边侧伸入连接组件2的壳体21尾端并固定在壳体21的外边侧上，以便在中间组件1与连接组件2之间解锁后，向前推动中间组件1，连接组件2带动收车钢绳36围绕连接组件2与固定组件3的铰接部转动，使收车钢绳36的有效距离变小从而带动车架卡合结构解锁(车架卡合结构为现有技术)，进而实现连接组件2和固定组件3之间解锁，在收车的同时实现手把的三折叠。
连接组件2的尾端为向前弯曲的弧形，其下表面具有一下缺口41，该下缺口41的顶面为平面，固定组件3的前端为向前弯曲的弧形，其上表面具有一上缺口42，该上缺口42的底面为平面，上缺口42的平面与下缺口41的平面贴合并由铰接轴43固定，在中间组件1与连接组件2之间锁定时，连接组件2的尾端和固定组件3的前端呈圆弧过渡，连接组件2的下缺口41和固定组件3的上缺口42相配合为解锁后二者之间弯折提供转动空间。
一种具有三折手把48的推车，它包括车架、安装在车架上的座位和车轮，车架包括车架主体、设于车架主体上的收车卡合结构和三折手把48，三折手把48的固定组件的尾端与车架主体相连，收车钢绳36的尾端穿入车架主体内与车架卡合结构相连。

Claims (10)

  1. 一种手把折叠机构，其特征在于：它包括中间组件和一对分别铰接在中间组件两端的连接组件，所述中间组件主要由管状外壳、压块和解锁片组成，所述压块的后部穿过外壳的前壁面伸入外壳中并活动安装使压块可前后移动，所述连接组件主要由管状壳体和具有弹性回复部件的卡合片组成，所述卡合片沿轴向可滑动安装在壳体内，在锁定状态下，卡合片的前端沿横向穿入外壳的端部中，所述解锁片具有固定在外壳内的固定部，该固定部设有伸出至压块后端与卡合片前端之间的自由端，向后推动压块，解锁片的自由端被压块推动使解锁片发生弹性形变，解锁片在水平面上的投影逐渐增长而将卡合片沿横向方向推出外壳实现解锁，撤销外力前后，卡合片和压块分别在弹性回复力作用下回复原状，再向前推动中间组件即可实现手把折叠，通过回拉中间组件使手把展开时卡合片在弹性回复力作用下被推入外壳中实现再次锁定。
  2. 根据权利要求1所述的手把折叠机构，其特征在于：所述中间组件还包括具有弹性回复部件的按钮，所述按钮可横向拨动安装在外壳的后壁面上，按钮与所述压块之间具有可随按钮移动限位压块或解除限位的限位机构，拨动按钮解除限位机构对压块的限位作用，同时向后推动压块，进行解锁操作；或在锁定状态下，拨动按钮通过限位机构限位压块以避免对压块的误操作。
  3. 根据权利要求1所述的手把折叠机构，其特征在于：所述卡合片前端面的前部分为弧形面或斜面，且其后部分为斜面。
  4. 根据权利要求3所述的手把折叠机构，其特征在于：所述连接组件的壳体内具有用于安装卡合片的滑动槽，所述卡合片的弹性回复部件一端固定在该滑动槽的尾部，另一端顶触在卡合片的尾端上；所述中间组件和连接组件的铰接部具有铰接轴，所述卡合片的前部设有长条形孔，所述铰接轴安装在该长条形孔内并将中间组件的外壳端部和连接组件的壳体端部铰接在一起，所述铰接轴可随着卡合片移动而在长条形孔内相对滑动。
  5. 根据权利要求1～4任一项所述的手把折叠机构，其特征在于：所述解锁片为∧形，所述解锁片的中部为固定部，所述压块为后端面具有开口的中空壳体，在该开口中上口沿和/或下口沿上设有向后伸出的顶柱，所述按钮主要由位于外壳外的拨动部和位于外壳内向前伸出的凸柱组成，凸柱可随按钮移动而顶 触在顶柱上限位压块或者脱离以撤销限位构成所述限位机构；该开口在横向方向上相对的两侧口沿分别为斜面，解锁片两翼的表面与该斜面相适配，在解锁片发生弹性形变的过程中，两翼沿着斜面滑动。
  6. 根据权利要求5所述的手把折叠机构，其特征在于：所述按钮的拨动部的前端面为一位于中间组件外壳内的块状体，所述凸柱设置在该拨动部的前端面上，且所述按钮的弹性回复部件位于拨动部的前端面与外壳的内端面之间。
  7. 根据权利要求6所述的手把折叠机构，其特征在于：所述中间组件的外壳主要由上壳体和下壳体对接而成，在所述压块的后部上表面和下表面分别设有上下对应的横向限位凸条，在所述上壳体的内顶面上和下壳体的内底面上分别设有用于约束限位凸条的横向限位卡槽，所述限位凸条可在限位卡槽中前后移动实现压块的活动安装。
  8. 一种使用权利要求1～7任一项所述手把折叠机构的三折手把，其特征在于：它包括所述的中间组件、所述的连接组件和一对固定组件，该对固定组件的前端分别与一个连接组件的尾端相铰接，所述固定组件主要由管体和收车钢绳组成，所述收车钢绳向前穿过所述管体伸入连接组件的壳体尾端固定，以便在中间组件与连接组件之间解锁后，向前推动中间组件，连接组件带动收车钢绳围绕连接组件与固定组件的铰接部转动，使收车钢绳的有效距离变小从而带动车架卡合结构解锁，进而实现连接组件和固定组件之间解锁，在收车的同时实现手把的三折叠。
  9. 根据权利要求8所述的三折手把，其特征在于：所述中间组件的外壳主要由上壳体和下壳体对接而成，在所述压块的后部上表面和下表面分别设有上下对应的横向限位凸条，在所述上壳体的内顶面上和下壳体的内底面上分别设有用于约束限位凸条的横向限位卡槽，所述限位凸条可在限位卡槽中前后移动实现压块的活动安装，所述中间组件上壳体的端部下表面为平台，所述中间组件下壳体的端部上表面为平台，该两平台之间形成间隙，所述连接组件的前端为扁平块状体插入该间隙中并由铰接轴固定；所述连接组件的尾端和所述固定组件的前端分别为向前弯曲的弧形，且所述连接组件的尾端和所述固定组件的前端分别具有相适配的缺口，缺口具有相贴合的平面并通过铰接轴固定，在中间组件与连接组件之间锁定时，连接组件的尾端和固定组件的前端呈圆弧过渡， 所述连接组件和固定组件的缺口相配合为解锁后二者之间弯折提供转动空间。
  10. 一种具有权利要求8或9所述的三折手把的推车，其特征在于：它包括车架、安装在车架上的座位和车轮，所述车架包括车架主体、设于车架主体上的收车卡合结构和所述的三折手把，所述三折手把的固定组件的尾端与车架主体相连，所述收车钢绳的尾端穿入车架主体内与所述车架卡合结构相连。
PCT/CN2018/095751 2018-07-16 2018-07-16 一种手把折叠机构和使用该折叠机构的三折手把及其推车 WO2020014810A1 (zh)

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