WO2016101893A1 - 一种童车车轮的折叠装置 - Google Patents

一种童车车轮的折叠装置 Download PDF

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Publication number
WO2016101893A1
WO2016101893A1 PCT/CN2015/098410 CN2015098410W WO2016101893A1 WO 2016101893 A1 WO2016101893 A1 WO 2016101893A1 CN 2015098410 W CN2015098410 W CN 2015098410W WO 2016101893 A1 WO2016101893 A1 WO 2016101893A1
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Prior art keywords
wheel
shaped connecting
limiting
connecting member
pin
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PCT/CN2015/098410
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English (en)
French (fr)
Inventor
吴春华
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嘉兴小虎子车业有限公司
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Publication of WO2016101893A1 publication Critical patent/WO2016101893A1/zh

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    • 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
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K9/00—Children's cycles
    • B62K9/02—Tricycles

Definitions

  • the present invention relates to a folding device for a stroller wheel, and more particularly to a rear wheel folding device for a three-wheeled stroller.
  • the folding device installed on the baby carriage is often aimed at the mechanism on the frame, but the four-wheeled baby carriage needs to be used from actual use.
  • the consideration is often the use of a universal wheel, so the wheel can also be easily adjusted to achieve the folding position, while the wheel of the three-wheeled baby carriage is often fixed at the time of setting, in the state of use and storage. In the state, the position of the rear two wheels is constant and cannot be folded.
  • the Chinese patent No. 200510119149.2 discloses a folding device which can change the position of the rear frame of the entire baby carriage.
  • the folding device is inconvenient to use during the actual folding process, and needs to push the entire rear frame. It is also more laborious.
  • the object of the present invention is a folding device for a stroller wheel, which can realize a folding function for a stroller wheel and is convenient to use.
  • a folding device for a baby carriage wheel comprising a wheel and a wheel fork tube connected to the wheel, wherein the end portion of the wheel fork tube connecting the wheel is provided with a U-shaped connecting member.
  • One end of the axle of the wheel extends into the U-shaped connecting member and is rotatably connected with the U-shaped connecting member, the wheel is rotatable about the U-shaped connecting member, and a limiting mechanism is arranged between the U-shaped connecting member and one end of the axle
  • the wheel rotation angle is limited by the position mechanism control.
  • the wheel can be rotated by a large angle by the opening of the U-shaped connecting member to realize the folding function, and the structure of the folded or unfolded state of the wheel is fixed by the limiting mechanism.
  • the limiting mechanism comprises a limiting hole disposed on the U-shaped connecting member and a limiting pin disposed on the axle, the limiting pin abutting against the inner wall of the U-shaped connecting member by an elastic member,
  • the end portion is provided with a step for penetrating into the limiting hole
  • the U-shaped connecting member is provided with a button, and pressing the button to press the limiting pin causes the step of the limiting pin to be disengaged from the limiting hole.
  • the step pin penetrates the limit hole, the wheel can not be rotated and is restricted. Press the button to remove the limit pin from the limit hole. When it leaves, the wheel can be rotated until the step of the limit pin springs into the limit hole again.
  • the axle pin is fixed on the axle and located in the U-shaped connecting member, and the limiting pin is placed in the limiting pin sleeve.
  • the elastic piece is a spring, and the spring is also located.
  • the limit pin sleeve is pressed into the inner wall of the U-shaped connecting member, and the step of the limiting pin is exposed from the limiting pin sleeve.
  • the telescopic space of the limit pin is provided in the limit pin sleeve, which actually limits the movable space of the limit pin. Under the action of the limit pin sleeve, the telescopic movement of the limit pin does not appear to be swaying. The fit of the limit hole.
  • the middle portion of the two side ears of the U-shaped connecting member is provided with two symmetrical positioning holes, and the positioning shaft is disposed on the axle and aligned with the positioning hole, the positioning hole and the positioning A set screw is inserted into the sleeve, and the wheel rotates around the positioning screw. Under the joint action of the positioning hole, the positioning sleeve and the positioning screw, the wheel has a small amplitude of shaking during the rotation process.
  • the ends of the two side ears of the U-shaped connecting member are all semi-circular, and the limiting holes are at least two and located on the same circumference in the semicircular shape, and the wheel can be Rotate within a 180 degree range around the U-shaped connector. The 180 degree rotation can rotate the wheel located outside the wheel fork tube to the inside of the wheel fork tube for folding purposes.
  • the limiting hole has two sets of four, each set of limiting holes comprises two lateral ears located in the U-shaped connecting piece and corresponding to a linear position, the limiting pin has two and is placed in the same In the limit pin sleeve, the two limit pins are pressed against the inner wall of the side ear by the same spring located therebetween.
  • the two-way limit is realized, so that the limit structure is more firm, and the limit pin is prevented from slipping from the limit hole in the limit state.
  • a sliding rail is provided on the inner wall of the U-shaped connecting member for sliding the step of the limiting pin, and the limiting hole is located in the sliding rail.
  • the function of the slide rail is to guide the limit pin as the wheel rotates, so that the rotation process is smooth and accurate.
  • the U-shaped connector covers the casing
  • the button comprises a protrusion and a flange proximate the end of the U-shaped connector
  • the casing is provided with a circular hole
  • the button The projection passes through the circular hole
  • the flange of the button is located below the edge of the circular hole.
  • the housing can protect the internal structure of the U-shaped connecting member, and also solves the problem of assembly of the button. When the limiting pin step penetrates the limiting hole, it contacts the end surface of the button.
  • the housing is divided into two parts connected by screws, which are easy to disassemble.
  • the invention has the following outstanding advantages: the connection relationship between the wheel and the wheel fork tube is improved, in particular, a limit mechanism is added, so that the wheel can be rotated when it is needed to be folded and will be located in the wheel fork tube
  • the outer wheel rotates to the inner side of the wheel fork tube, which is especially suitable for the three-wheeled baby carriage;
  • the limit mechanism is set with the limit hole, the limit pin and the button. When the button is pressed, the wheel can be rotated, which is convenient and practical, and the limit is limited.
  • the fit of the hole and the limit pin is sufficiently strong.
  • Figure 1 is an exploded view of the structure of the present invention
  • FIG. 2 is a schematic structural view of a U-connecting member according to the present invention.
  • Figure 3 is a schematic view showing the structure of the wheel in an unfolded state
  • Figure 4 is a schematic view showing the structure of the wheel in a folded state according to the present invention.
  • a folding device for a stroller wheel includes a wheel 1 and a wheel fork tube 2 connected to the wheel.
  • This embodiment is preferably a rear wheel of a three-wheeled stroller.
  • the wheel 1 is located in the wheel fork tube in use.
  • the outer side of the wheel 2 is generally arcuate, and the end of the wheel fork tube 2 connected to the wheel is provided with a U-shaped connecting member 3, and the U-shaped connecting member 3 has a certain width and a certain space, wherein One end of the axle 4 of the wheel extends into the U-shaped connecting member 3 and is rotatably connected to the U-shaped connecting member 3, the wheel 1 is rotatable about the U-shaped connecting member 3, and the U-shaped connecting member 3 and the axle 4 are A limiting mechanism is arranged between one end, and the wheel rotation angle is limited by the position mechanism.
  • the limiting mechanism includes a limiting hole 31 disposed on the U-shaped connecting member 3 and a limiting pin 5 disposed on the axle 4, and the limiting pin 5 is pressed against the U-shaped connecting member 3 by an elastic member.
  • the inner wall, the end of the limiting pin 5 is provided with a step for penetrating into the limiting hole 31, the U-shaped connecting member 3 is provided with a button 6, and the button 6 is pressed to press the limiting pin 5 to make the limiting pin
  • the step is disengaged from the limiting hole 31.
  • the step of the limit pin 5 penetrates into the limit hole 31, and the limit hole 31 and the limit pin 5 cooperate, the wheel 1 cannot rotate, and when the wheel needs to be folded, the button must be pressed first. 6.
  • the step of the limit pin 5 is pressed by the button 6 in the direction of the U-shaped connecting member 3 to be disengaged from the limiting hole 31.
  • the button 6 can be provided with a bump 62 relative to the position of the limiting hole 31.
  • the limiting pin sleeve 7 is fixed on the axle 4 and is located in the U-shaped connecting member 3 .
  • the position pin 5 is placed in the limit pin sleeve 7, the elastic piece is a spring 8, and the spring 8 is also located in the limit pin sleeve 7 and presses the limit pin 5 against the U-shaped connector 3
  • the inner wall, the limit pin sleeve 7 should have a gap with the inner wall of the U-shaped connecting member 3, and the step of the limiting pin 5 always acts from the limit pin sleeve 7 under the action of the spring 8. Exposed.
  • the range of movement of the limit pin 5 is limited by the limit pin sleeve 7, since the limit pin 5 can be moved along the limit pin sleeve 7 when the button is pushed, likewise at the lower limit pin 5 of the spring 8 It also moves along the limit pin sleeve 7, and during the rotation of the wheel, the limit 5 is not limited by the limitation of the pin sleeve 7, and a large amount of sway is likely to occur.
  • the central portion of the two side ears of the U-shaped connecting member 3 is provided with two symmetrical positioning holes 32, and the positioning shaft 9 is disposed on the axle 4 and aligned
  • the positioning hole 32, the positioning hole 32 and the positioning sleeve 9 penetrate the set screw 10, and the wheel 1 rotates around the positioning screw 10.
  • the positioning sleeve 9 is mainly engaged with the positioning screw 10 to provide a rotation center for the rotation of the wheel 1, and the positioning sleeve 9 and the limit pin sleeve 7 are arranged side by side on the axle 4.
  • the ends of the two side ears of the U-shaped connecting member 3 are all semi-circular, and the limiting holes 31 are located at two The semicircular shape is on the same diameter, and the wheel 1 can be rotated 180 degrees around the U-shaped connecting member 3.
  • the limit pin sleeve 7 and the limit pin 5 rotate around the positioning screw 10, so it is more reasonable to set the ends of the two side ears of the U-shaped connecting member 3 to be semicircular.
  • the two limiting holes 31 can be set to the same diameter to meet the folding requirements of the wheel 1.
  • the wheel 1 is folded to the wheel fork tube under the state of use of the wheel and in the folded state, just rotated by 180 degrees. 2 inside.
  • the number of the limiting holes 31 may exceed two semicircles distributed at the ends of the side ears and preferably on the same circumference, and the wheel 1 can be adjusted at various angles to suit the demand.
  • the limiting hole 31 has two sets of four, each set of limiting holes including two U-shaped connecting members 3.
  • the two side ears have corresponding linear positions.
  • the limit pin 5 also has two and is placed in the same limit pin sleeve 7. The two limit pins are pressed by the same spring 8 located therebetween. The inner wall of the side ear. The working principle of the limiting hole 31 and the limiting pin 5 has been described in detail above.
  • a sliding rail 33 for sliding the stepped pin is provided on the inner wall of the U-shaped connecting member 3, and the limiting hole 31 is located in the sliding rail 33.
  • the width of the slide rail 33 should naturally also be adapted to the diameter of the limit pin step.
  • the limit pin step also rotates along the slide rail 33. Under the guiding action of the slide rail 33, the rotation process is smoother.
  • the U-shaped connecting member 3 covers the housing 12.
  • a housing 11 for covering an end of the axle may be disposed inside the housing 12 to protect the internal structure thereof.
  • the button 6 includes a protrusion 61 and a flange 61 adjacent to the end of the U-shaped connector.
  • the housing is provided with a circular hole, and the protrusion of the button passes through the circular hole.
  • the flange 61 of the button is located below the edge of the circular hole.
  • a raised contact 62 that aligns the stop hole can be provided below the button.
  • the housing 12 is divided into two sections that are connected by screws.

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

Abstract

一种童车车轮的折叠装置，包括车轮（1）以及和车轮（1）连接的车轮叉管（2），所述的车轮叉管（2）连接车轮（1）的端部设有一U形连接件（3），所述的车轮（1）的车轴（4）的一端伸入U形连接件（3）内并且与U形连接件（3）转动连接，所述车轮（1）可绕着U形连接件（3）转动，U形连接件（3）和车轴（4）的一端之间设有限位机构，所述的车轮（1）转动角度受限位机构控制。对车轮（1）和车轮叉管（2）之间的连接关系进行了改进，尤其是增设了限位机构，使得车轮（1）可以在需要折叠时进行转动将位于车轮叉管（2）外侧的车轮（1）转动至车轮叉管（2）内侧，特别适用于三轮童车。

Description

一种童车车轮的折叠装置
相关申请
本发明申请要求2014年12月24日申请的，申请号为201420826280.7，名称为“一种童车车轮的折叠装置”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本发明涉及一种童车车轮的折叠装置，尤其是针对三轮童车的后轮折叠装置。
背景技术
为节约空间，现有的童车大多都具备可以折叠的功能，不同的童车种类往往折叠方式不同，设置于童车上的折叠装置往往是针对车架上的机构的，但是四轮童车从实际使用需要考量往往采用的是万向轮，所以针对车轮还可以简单的调节下位置以实现折叠，而三轮童车的车轮则从稳定性角度考虑在设置时往往是固定位置的，在使用状态下和存放状态下后两个轮子的位置是不变的也就无法折叠。
针对三轮童车的后轮，也有专利号为200510119149.2的中国专利公开了一种可改变整个童车后车架位置的折叠装置，这种折叠装置在实际折叠过程中使用不便，需要推动整个后车架，也比较费力。
发明内容
本发明的目的是一种童车车轮的折叠装置，可以实现对于童车车轮的折叠功能，并且使用方便。
为了解决上述技术问题，本发明采用如下技术方案：一种童车车轮的折叠装置，包括车轮以及和车轮连接的车轮叉管，所述的车轮叉管连接车轮的端部设有一U形连接件，所述的车轮的车轴的一端伸入U形连接件内并且与U形连接件转动连接，所述车轮可绕着U形连接件转动，U形连接件和车轴的一端之间设有限位机构，所述的车轮转动角度受限位机构控制。绕着U形连接件，车轮可以利用U形连接件的开口做大角度的转动进而实现折叠的功能，在限位机构的作用下将车轮折叠或者不折叠状态的结构予以固定。
作为优选，所述的限位机构包括设置于U形连接件上的限位孔和设置于车轴上的限位销，所述的限位销通过一弹性件抵住U形连接件内壁，其端部设有台阶可穿入所述的限位孔，所述的U形连接件上设置按钮，按动按钮下压限位销使限位销的台阶从限位孔中脱离。限位销在台阶在穿入限位孔的情况下，车轮不可转动被限位，按动按钮可以将限位销从限位孔中脱 离出，此时车轮可进行转动直至限位销的台阶再次弹入限位孔中。
作为优选，所述的车轴上固设限位销套筒并位于所述的U形连接件内，限位销置入限位销套筒内，所述的弹性片为一弹簧，弹簧也位于限位销套筒内并将所述的限位销压向U形连接件的内壁，所述的限位销的台阶从所述的限位销套筒中露出。限位销套筒内提供了限位销的伸缩空间，实际上也限制了限位销的活动空间，在限位销套筒的作用下，限位销的伸缩活动不会出现摇摆利于其与限位孔的配合。
作为优选，所述的U形连接件的两个侧耳上的中部设置对称的两个定位孔，所述的车轴上设置定位套筒并对准所述的定位孔，所述的定位孔和定位套筒内穿设定位螺杆，所述的车轮绕着定位螺杆转动。定位孔、定位套筒和定位螺杆的共同作用下，车轮在转动过程出现晃动的幅度小。
作为优选，所述U形连接件的两个侧耳的端部均为半圆形，所述的限位孔至少两个并位于所述的半圆形内处于同一圆周上，所述的车轮可绕着U形连接件做180度范围内转动。180度转动可以将位于车轮叉管外侧的车轮转动至车轮叉管内侧以达到折叠的目的。
作为优选，所述的限位孔有两组四个，每组限位孔包含两个位于U形连接件的两个侧耳且直线位置对应，所述的限位销有两个并且置入同一限位销套筒内，两个限位销由位于二者之间的同一弹簧压向侧耳的内壁。通过两个限位销两组限位孔，实现双向限位使得限位结构更加牢固，防止在限位状态下出现限位销从限位孔中打滑。
作为优选，在U形连接件的内壁上设置供所述的限位销台阶滑动的滑轨，所述的限位孔位于滑轨内。滑轨的作用是对限位销随着车轮转动时进行导向，使得转动过程平滑准确。
作为优选，所述的U形连接件包覆壳体，所述的按钮包括凸起和贴近U形连接件的端部的凸缘，所述的壳体上开设有圆孔，所述的按钮的凸起穿过位于所述的圆孔，所述的按钮的凸缘位于圆孔边缘的下方。壳体即可以对U形连接件内部结构进行保护，还解决了对于按钮的装配问题，限位销台阶穿入限位孔时会接触按钮的端面。
作为优选，所述的壳体分为由螺钉连接的两个部分，易于拆装。
采用上述技术方案后，本发明具有如下突出优点：对车轮和车轮叉管之间的连接关系进行了改进，尤其是增设了限位机构，使得车轮可以在需要折叠时进行转动将位于车轮叉管外侧的车轮转动至车轮叉管内侧，特别适用于三轮童车；限位机构的设置采用了限位孔、限位销和按钮，使用时按动按钮即可转动车轮，方便实用，并且限位孔和限位销的配合足够牢靠。
说明书附图
图1为本发明结构分解图；
图2为本发明U连接件的结构示意图；
图3为本发明车轮未折叠状态下的结构示意图；
图4为本发明车轮折叠状态下的结构示意图。
下面结合附图对本发明作进一步描述。
具体实施方式
参见图1-4，一种童车车轮的折叠装置，包括车轮1以及和车轮连接的车轮叉管2，本实施例优选的是三轮童车的后轮，车轮1在使用状态下位于车轮叉管2的外侧，车轮叉管2一般是弓形的，所述的车轮叉管2连接车轮的端部设有一U形连接件3，该U形连接件3具备一定的宽度围成一定的空间，其中所述的车轮的车轴4的一端伸入U形连接件3内并且与U形连接件3转动连接，所述车轮1可绕着U形连接件3转动，U形连接件3和车轴4的一端之间设有限位机构，所述的车轮转动角度受限位机构控制。所述的限位机构包括设置于U形连接件3上的限位孔31和设置于车轴4上的限位销5，所述的限位销5通过一弹性件抵住U形连接件3内壁，限位销5端部设有台阶可穿入所述的限位孔31，所述的U形连接件3上设置按钮6，按动按钮6下压限位销5使限位销的台阶从限位孔31中脱离。童车在使用状态下，限位销5的台阶穿入限位孔31，限位孔31和限位销5配合，车轮1将无法转动，而当需要对车轮进行折叠时，首先要按下按钮6，通过按钮6将限位销5的台阶往U形连接件3的方向压进而从限位孔31中脱离，为了更好的将限位销5的台阶从限位孔31中脱离出来，按钮6上可以设置相对限位孔31位置的凸点62，当限位销5的台阶从限位孔31中脱离出来时，车轮1处于可以自由转动的状态，转动车轮1即可实现对车轮1的折叠。
如图1所示，作为限位销5和车轴4之间的连接关系的优选方式，所述的车轴4上固设限位销套筒7并位于所述的U形连接件3内，限位销5置入限位销套筒7内，所述的弹性片为一弹簧8，弹簧8也位于限位销套筒7内并将所述的限位销5压向U形连接件3的内壁，限位销套筒7应该与U形连接件3的内壁之间留有空隙，所述的限位销5的台阶在弹簧8的作用下始终从所述的限位销套筒7中露出。通过限位销套筒7将限位销5的活动范围进行限制，因为限位销5在按钮按动下可以沿着限位销套筒7运动，同样的在弹簧8的作用下限位销5也是沿着限位销套筒7运动，而且在车轮转动过程中，限位5不受限位销套筒7的限制很容易出现较大幅度的晃动。
参见图1-4，作为进一步优选，所述的U形连接件3的两个侧耳上的中部设置对称的两个定位孔32，所述的车轴4上设置定位套筒9并对准所述的定位孔32，所述的定位孔32和定位套筒9内穿设定位螺杆10，所述的车轮1绕着定位螺杆10转动。定位套筒9主要是跟定位螺杆10配合来给车轮1的转动提供旋转中心，定位套筒9和限位销套筒7并排设置于车轴4上。所述U形连接件3的两个侧耳的端部均为半圆形，所述的限位孔31有两个并位于 所述的半圆形内处于同一直径上，所述的车轮1可绕着U形连接件3做180度转动。车轮1在转动过程中，限位销套筒7以及限位销5都是绕着定位螺杆10转动，所以将U形连接件3的两个侧耳的端部均设置为半圆形是较为合理的，而两个限位孔31同一直径设置即可满足车轮1的折叠要求，具体参见图3和图4，车轮使用状态下和折叠状态下刚好旋转180度，将车轮1折叠至车轮叉管2内侧。当然在实际运用过程中，限位孔31的数量可以超过两个分布于侧耳的端部的半圆形内并优选位于同一圆周上，是的车轮1可以多个角度调整位置以适应需求。
参见图1和图2，为了进一步加强限位机构在限位状态的结构稳定性，所述的限位孔31有两组四个，每组限位孔包含两个位于U形连接件3的两个侧耳且直线位置对应，相应的，所述的限位销5也有两个并且置入同一限位销套筒7内，两个限位销由位于二者之间的同一弹簧8压向侧耳的内壁。限位孔31和限位销5的工作原理在上文已经详细描述。
参见图2，在U形连接件3的内壁上设置供所述的限位销台阶滑动的滑轨33，所述的限位孔31位于滑轨33内。滑轨33的宽度自然也应该与限位销台阶的直径适配，当车轮转动时，限位销台阶沿着滑轨33也跟着转动，在滑轨33的导向作用下，转动过程更加平滑。
参见图1，所述的U形连接件3包覆壳体12，在实施过程中，也可以在壳体12的内部设置包覆一个车轴端部用的外壳11以保护其内部结构，所述的按钮6包括凸起和贴近U形连接件的端部的凸缘61，所述的壳体上开设有圆孔，所述的按钮的凸起穿过位于所述的圆孔，所述的按钮的凸缘61位于圆孔边缘的下方，为了使得按钮6更好的与限位销配合，可以在按钮的下方设置对准限位孔的凸出的触点62。为了装卸方便，将所述的壳体12分为由螺钉连接的两个部分。
除上述优选实施例外，本发明还有其他的实施方式，本领域技术人员可以根据本发明作出各种改变，只要不脱离本发明的精神，均应属于本发明所附权利要求所定义的范围。

Claims (9)

  1. 一种童车车轮的折叠装置，包括车轮(1)以及和车轮连接的车轮叉管(2)，其特征在于：所述的车轮叉管(2)连接车轮的端部设有一U形连接件(3)，所述的车轮的车轴(4)的一端伸入U形连接件(3)内并且与U形连接件(3)转动连接，所述车轮(1)可绕着U形连接件(3)转动，U形连接件(3)和车轴(4)的一端之间设有限位机构，所述的车轮转动角度受限位机构控制。
  2. 根据权利要求1所述的童车车轮的折叠装置，其特征在于：所述的限位机构包括设置于U形连接件(3)上的限位孔(31)和设置于车轴(4)上的限位销(5)，所述的限位销(5)通过一弹性件抵住U形连接件(3)内壁，其端部设有台阶可穿入所述的限位孔，所述的U形连接件(3)上设置按钮(6)，按动按钮(6)下压限位销(5)使限位销的台阶从限位孔(31)中脱离。
  3. 根据权利要求2所述的童车车轮的折叠装置，其特征在于：所述的车轴(4)上固设限位销套筒(7)并位于所述的U形连接件(3)内，限位销(5)置入限位销套筒(7)内，所述的弹性片为一弹簧(8)，弹簧(8)也位于限位销套筒(7)内并将所述的限位销(5)压向U形连接件(3)的内壁，所述的限位销(5)的台阶从所述的限位销套筒(7)中露出。
  4. 根据权利要求1所述的童车车轮的折叠装置，其特征在于：所述的U形连接件(3)的两个侧耳上的中部设置对称的两个定位孔(32)，所述的车轴(4)上设置定位套筒(9)并对准所述的定位孔(32)，所述的定位孔(32)和定位套筒(9)内穿设定位螺杆(10)，所述的车轮(1)绕着定位螺杆(10)转动。
  5. 根据权利要求3所述的童车车轮的折叠装置，其特征在于：所述U形连接件(3)的两个侧耳的端部均为半圆形，所述的限位孔(31)至少两个并位于所述的半圆形内处于同一圆周上，所述的车轮(1)可绕着U形连接件(3)做180度范围内转动。
  6. 根据权利要求5所述的童车车轮的折叠装置，其特征在于：所述的限位孔(31)有两组四个，每组限位孔包含两个位于U形连接件(3)的两个侧耳且直线位置对应，所述的限位销(5)有两个并且置入同一限位销套筒(7)内，两个限位销由位于二者之间的同一弹簧(8)压向侧耳的内壁。
  7. 根据权利要求2或6所述的童车车轮的折叠装置，其特征在于：在U形连接件(3)的内壁上设置供所述的限位销台阶滑动的滑轨(33)，所述的限位孔(31)位于滑轨内。
  8. 根据权利要求7所述的童车车轮的折叠装置，其特征在于：所述的U形连接件(3)包覆壳体(12)，所述的按钮(6)包括凸起和贴近U形连接件的端部的凸缘(61)，所述的壳 体上开设有圆孔，所述的按钮的凸起穿过位于所述的圆孔，所述的按钮的凸缘(61)位于圆孔边缘的下方。
  9. 根据权利要求8所述的童车车轮的折叠装置，其特征在于：所述的壳体(12)分为由螺钉连接的两个部分。
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