WO2017024826A1 - 一种车座升降装置及自行车 - Google Patents

一种车座升降装置及自行车 Download PDF

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Publication number
WO2017024826A1
WO2017024826A1 PCT/CN2016/081910 CN2016081910W WO2017024826A1 WO 2017024826 A1 WO2017024826 A1 WO 2017024826A1 CN 2016081910 W CN2016081910 W CN 2016081910W WO 2017024826 A1 WO2017024826 A1 WO 2017024826A1
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Prior art keywords
piston rod
cylinder
seat
locking
locking mechanism
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PCT/CN2016/081910
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English (en)
French (fr)
Inventor
李大龙
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Le Holdings Beijing Co Ltd
LeTV Sports Culture Develop Beijing Co Ltd
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Le Holdings Beijing Co Ltd
LeTV Sports Culture Develop Beijing Co Ltd
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Publication of WO2017024826A1 publication Critical patent/WO2017024826A1/zh
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
    • B62J1/02—Saddles resiliently mounted on the frame; Equipment therefor, e.g. springs
    • B62J1/06—Saddles capable of parallel motion up and down
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J1/00—Saddles or other seats for cycles; Arrangement thereof; Component parts
    • B62J1/08—Frames for saddles; Connections between saddle frames and seat pillars; Seat pillars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems

Definitions

  • the invention relates to the technical field of bicycles, and in particular to a seat lifting device and a bicycle.
  • the seat of the bicycle must match the height of the rider, so people of different heights need to adjust the seat of the bicycle to different heights when riding the bicycle.
  • the rider when the rider adjusts the height of the bicycle seat, the rider first needs to get off the vehicle, and then loosen the bolts that lock the seatpost and the seat tube with tools such as a wrench, and then The height of the seat is adjusted to increase or decrease, and then the rider then rides on the seat to feel the height of the seat. If it is not suitable, you need to get off again to adjust the height of the seat until the car The height of the seat is suitable. Finally, the rider needs to get off the vehicle and tighten the bolt with a wrench to complete the adjustment of the height of the seat. This is not only time-consuming and labor-intensive but also requires tools.
  • Embodiments of the present invention provide a vehicle seat lifting device and a bicycle, which can simplify the operation of the rider to adjust the height of the seat.
  • Embodiments of the present invention provide a vehicle seat lifting device, including:
  • a cylinder comprising a cylinder, a piston rod and a piston rod locking mechanism, wherein one of the cylinder and the piston rod is mounted to the vehicle body and the other is mounted to the vehicle seat; Locking the relative position between the piston rod and the cylinder when the rod locking mechanism is in the locking position;
  • a first air source device wherein an air outlet of the first air source device communicates with an air inlet of the cylinder to control air pressure in the cylinder;
  • control module is in signal connection with the first air source device and the piston rod locking mechanism to control the first air source device and the piston rod locking mechanism to operate.
  • An embodiment of the present invention provides a bicycle, including a vehicle body and a vehicle seat, and further includes the vehicle seat lifting device provided in the above embodiment, wherein:
  • One of the cylinder block and the piston rod of the seat lift device is mounted to the vehicle body, and the other is mounted to the vehicle seat.
  • the rider when the rider needs to adjust the height of the seat, the rider can sit on the seat and control the piston rod locking mechanism to be switched by the locking position through the control module.
  • controlling the first air source device to adjust the outer elongation of the piston rod of the cylinder, thereby realizing the adjustment of the height of the seat, and controlling the first air source device when the rider feels that the height of the seat meets the requirement
  • the working state is to stop the action of the cylinder, and at the same time, the control piston rod locking mechanism is switched from the unlocking position to the locking position to lock the relative position between the piston rod of the cylinder and the cylinder block, thereby realizing the locking of the seat height, which is quick Convenience.
  • FIG. 1 is a schematic structural view of a vehicle seat lifting device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a piston rod locking mechanism of a structure in an unlocking position according to an embodiment of the present invention
  • FIG. 3 is a structural schematic view of the piston rod locking mechanism of the structure shown in FIG. 2 in a locked position.
  • an embodiment of the present invention provides a vehicle seat lifting device, which may include:
  • Cylinder 3 includes a cylinder block 32, a piston rod 31 and a piston rod locking mechanism 33, wherein one of the cylinder block 32 and the piston rod 31 is mounted on the body of the bicycle, and the other is mounted on the seat 2 of the bicycle; When the piston rod locking mechanism 33 is in the locking position, the relative position between the piston rod 31 and the cylinder 32 is locked;
  • a first air source device 4 that communicates with the air inlet of the cylinder to control the air pressure in the cylinder 32;
  • the control module 5 is connected to the first air source device 4 and the piston rod lock mechanism 33 to control the operation of the first air source device 4 and the piston rod lock mechanism 33.
  • the rider when the rider needs to adjust the height of the seat 2, the rider can sit on the seat 2 and control the piston rod locking mechanism 33 through the control module 5.
  • the locking position is switched to the unlocking position, and the first air source device 4 is controlled to adjust the outer elongation of the piston rod 31 of the cylinder 3, thereby realizing the adjustment of the height of the seat 2, when the rider feels that the height of the seat 2 is satisfied.
  • the operating state of the first air source device 4 is controlled to stop the action of the cylinder 3, and at the same time, the control piston rod locking mechanism 33 is switched from the unlocking position to the locking position to lock the piston rod 31 of the cylinder 3 and the cylinder 32.
  • the relative position between the two, thereby achieving the locking of the height of the seat 2 is quick and convenient.
  • the cylinder 33 in the cylinder 3 of the seat lifting device, the cylinder 33 is fixed to the vehicle body, and the bicycle seat 2 is mounted on the extended end of the piston rod 31, as shown in FIG.
  • the bicycle seat is mounted on the cylinder block (not shown).
  • the piston rod locking mechanism in the seat lifting device may include:
  • each locking block 331 is retracted into the annular groove; when the piston rod locking mechanism 33 is in the locking position, as shown in FIG. 3, each locking block 331 protrudes out of the annular groove and with the cylinder 32
  • the inner wall is offset;
  • the first driving mechanism that drives the locking block 331 operates, and the first driving mechanism is connected to the control module.
  • the portion where the piston rod 31 is provided with the annular groove has a hollow structure, and the first driving mechanism comprises:
  • a driving motor 334 installed in the hollow structure of the piston rod 31, the output shaft of the driving motor 334 is coaxially fixed with a threaded screw 336;
  • a driving ring 333 disposed on the piston rod 31 and located in the annular groove, the driving ring 333 is slidably engaged with the groove bottom of the annular groove;
  • each transmission rod 332 is hinged with the driving ring 333, and the other end is hinged with its corresponding locking block 331;
  • a sliding block 338 located in the hollow structure and threaded with the threaded screw, the side wall of the hollow structure is provided with a plurality of slots 335 extending along the axial direction of the piston rod;
  • connecting rod 337 One end of the connecting rod 337 corresponding to the slot 335, one end of each connecting rod 337 is fixedly connected with the slider 338, and the other end is fixedly connected to the driving ring 333 after passing through the slot 335, and is driven to slide when the driving motor 334 is activated.
  • the block 338 and the drive ring 333 move along the axis of the piston rod 31, thereby driving the locking block 331 to slide over or retract the annular groove on the side wall of the annular groove.
  • each locking block 331 does not contact the inner wall of the cylinder block 32, and thus the piston rod 31 and the cylinder block 32 cannot be locked.
  • the relative position between the piston rod 31 can be operated under the driving of the first air source device 4, thereby adjusting the height of the bicycle seat 2; when the piston rod locking mechanism 33 is in the locking position, as shown in FIG.
  • the drive ring 333 slides along the axis line of the piston rod 31 under the driving of the drive motor 334, thereby driving the lock blocks 331 to protrude from the annular groove and abut against the inner wall of the cylinder block 32, thereby driving the piston rod 31 and the cylinder.
  • the relative position of the body 32 is locked, thereby determining the height of the seat 2.
  • each of the locking blocks 331 may include a rigid portion and a flexible portion, and in each of the locking blocks 331, The flexible portion is located on a side of the rigid portion facing away from the bottom of the annular groove groove and is fixed to the rigid portion.
  • the plurality of lock blocks 331 are evenly distributed along the circumferential direction of the axial line of the piston rod 31.
  • piston rod locking mechanism 33 in the above-mentioned seat lifting device can also be in other structural forms.
  • piston rod locking mechanism 33 can further include:
  • a receiving groove disposed on the wall of the cylinder body and having an opening in the inner wall of the cylinder;
  • annular airbag structure disposed in the receiving groove and sleeved on the outer side of the piston rod.
  • the annular airbag When the annular airbag is filled with a set amount of gas, the annular airbag fills the receiving groove and holds the piston rod;
  • a second air source device in communication with the interior of the annular air bag.
  • the annular airbag can be expanded or contracted under the control of the second air source device, thereby enabling locking and contact locking of the cylinder block 32 and the piston rod 31.
  • An embodiment of the present invention further provides a bicycle including a vehicle body, and further comprising any one of the seat lifting devices provided in the above embodiments.
  • the rider can adjust the height of the bicycle seat conveniently and quickly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Seats For Vehicles (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

一种车座升降装置及自行车。车座升降装置包括：气缸（3），气缸（3）的缸体（32）和活塞杆（31）中的一个安装于车体，另一个安装于车座（2）；当活塞杆锁定机构（33）处于锁紧位时锁定活塞杆（31）与缸体（32）之间的相对位置；第一气源装置（4），第一气源装置（4）的出气口与缸体（32）的进气口连通以控制缸体（32）内气压；控制模块（5），控制模块（5）与第一气源装置（4）以及活塞杆锁定机构（33）信号连接、以控制第一气源装置（4）与活塞杆锁定机构（33）动作。骑乘者可以坐在车座（2）上通过控制模块（5）控制活塞杆锁定机构（33）由锁紧位切换至解锁位，同时控制第一气源装置（4）调节气缸（3）的活塞杆（31）的外伸长度，进而实现对车座（2）高度的调节，然后控制活塞杆锁定机构（33）由解锁位切换至锁紧位，进而实现对车座（2）高度的锁定，快捷方便。

Description

一种车座升降装置及自行车
本申请要求在2015年8月11日提交中国专利局、申请号为201510491151.6、发明名称为“一种车座升降装置及自行车”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及自行车技术领域，尤其涉及一种车座升降装置及自行车。
背景技术
自行车作为一种绿色环保的出行工具，其骑乘时的舒适性和便利性是影响用户体验的重要因素。
其中，自行车的车座必须要与骑乘者的身高相匹配，因此，不同身高的人在骑乘自行车时需要将自行车的车座调节到不同的高度。
但是，目前在人们骑乘者对自行车的车座进行高度调节时，首先骑乘者首先需要下车，然后借助扳手等工具将锁定车座杆和车座管的螺栓松动，然后将后，对车座的位置高度进行调节调高或者调低，然后之后骑乘者在再上车做坐到车座上感受车座的高度是否合适，不合适的话则需要再次下车调节车座高度直至车座的高度合适，最后骑乘者还需下车用扳手将螺栓紧固，才能完成对车座高度的调节，这样不仅费时费力而且还需要借助工具完成。
发明内容
本发明实施例提供了一种车座升降装置及自行车，该车座升降装置能够简化骑乘者对车座的高度进行调节的操作。
本发明实施例提供一种车座升降装置，包括：
气缸，所述气缸包括缸体、活塞杆以及活塞杆锁定机构，其中，所述缸体和所述活塞杆中的一个安装于车体，另一个安装于车座；当所述活塞 杆锁定机构处于锁紧位时锁定所述活塞杆与所述缸体之间的相对位置；
第一气源装置，第一气源装置的出气口与所述缸体的进气口连通以控制所述缸体内气压；
控制模块，所述控制模块与所述第一气源装置以及所述活塞杆锁定机构信号连接、以控制所述第一气源装置与所述活塞杆锁定机构动作。
本发明实施例提供一种自行车，包括车体与车座，还包括上述实施例中提供的车座升降装置，其中：
车座升降装置的缸体和活塞杆中的一个安装于车体，另一个安装于车座。
本发明实施例提供的车座升降装置及自行车中，骑乘者在需要对车座的高度进行调节时，骑乘者可以坐在车座上通过控制模块控制活塞杆锁定机构由锁紧位切换至解锁位，同时控制第一气源装置调节气缸的活塞杆的外伸长度，进而实现对车座高度的调节，当骑乘者感受到车座的高度满足要求时，控制第一气源装置的工作状态以停止气缸的动作，同时，控制活塞杆锁定机构由解锁位切换至锁紧位，以锁定气缸的活塞杆与缸体之间的相对位置，进而实现对车座高度的锁定，快捷方便。
附图说明
图1为本发明实施例提供的车座升降装置的结构示意图；
图2为本发明实施例提供的车座升降装置中一种结构的活塞杆锁定机构处于解锁位时的结构示意图；
图3为图2所示结构的活塞杆锁定机构处于锁紧位时的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参考图1，本发明实施例提供一种车座升降装置，可以包括：
气缸3，气缸3包括缸体32、活塞杆31以及活塞杆锁定机构33，其中，缸体32和活塞杆31中的一个安装于自行车的车体，另一个安装于自行车的车座2；当活塞杆锁定机构33处于锁紧位时锁定活塞杆31与缸体32之间的相对位置；
出气口与缸体的进气口连通以控制缸体32内气压的第一气源装置4；
与第一气源装置4以及活塞杆锁定机构33信号连接、以控制第一气源装置4与活塞杆锁定机构33动作的控制模块5。
本发明实施例提供的车座升降装置及自行车中，骑乘者在需要对车座2的高度进行调节时，骑乘者可以坐在车座2上通过控制模块5控制活塞杆锁定机构33由锁紧位切换至解锁位，同时控制第一气源装置4调节气缸3的活塞杆31的外伸长度，进而实现对车座2高度的调节，当骑乘者感受到车座2的高度满足要求时，控制第一气源装置4的工作状态以停止气缸3的动作，同时，控制活塞杆锁定机构33由解锁位切换至锁紧位，以锁定气缸3的活塞杆31与缸体32之间的相对位置，进而实现对车座2高度的锁定，快捷方便。
一种具体实施方式中，上述车座升降装置的气缸3中，缸体33固定于车体，自行车的车座2安装于活塞杆31的外伸端，如图1中所示。当然，还可以是将活塞杆的外伸端固定于车体，自行车的车座安装于缸体(图中未示出)。
在上述各实施方式的基础上，如图2和图3所示，车座升降装置中的活塞杆锁定机构可以包括：
设置于活塞杆31处于缸体32内部位上的环形凹槽；
安装于环形凹槽内的多个锁定块331，各锁定块331朝向活塞杆31伸出端的侧面与环形凹槽的侧壁相抵且滑动配合；当活塞杆锁定机构33处于解锁位时，如图2所示，每一个锁定块331缩回至环形凹槽内；当活塞杆锁定机构33处于锁紧位时，如图3所示，各锁定块331探出环形凹槽且与缸体32的内壁相抵；
驱动锁定块331动作的第一驱动机构，第一驱动机构与控制模块信号连接。
一种具体实施方式中，如图2和图3所示，活塞杆31设置环形凹槽的部位具有中空结构，且第一驱动机构包括：
安装于活塞杆31中空结构内的驱动电机334，驱动电机334的输出轴上同轴固定有螺纹丝杠336；
套设于活塞杆31上、且位于环形凹槽内的驱动环333，驱动环333与环形凹槽的槽底滑动配合；
与锁定块331一一对应的传动杆332，每一个传动杆332的一端与驱动环333铰接，另一端与其对应的锁定块331铰接；
位于中空结构内、且与螺纹丝杠螺纹配合的滑块338，中空结构的侧壁上设有多个沿活塞杆轴心线方向延伸的槽孔335；
与槽孔335一一对应的连接杆337，每一个连接杆337的一端与滑块338固定连接、且另一端穿过槽孔335后与驱动环333固定连接，当驱动电机334动作时驱动滑块338以及驱动环333沿活塞杆31的轴心线移动，进而驱动锁定块331在环形凹槽的侧壁上滑动伸出或缩回环形凹槽。
如图2和图3所示方位，活塞杆锁定机构33处于解锁位时如图2所示，此时各锁定块331与缸体32的内壁不接触，进而不能锁定活塞杆31与缸体32之间的相对位置，此时，活塞杆31能够在第一气源装置4的驱动下动作，进而对自行车车座2的高度进行调节；当活塞杆锁定机构33处于锁紧位时如图3所示，驱动环333在驱动电机334的驱动下沿活塞杆31的轴心线向上滑动，进而驱动各锁定块331探出环形凹槽与缸体32的内壁相抵，进而将活塞杆31与缸体32的相对位置进行锁定，进而确定了车座2的高度。
一种具体实施方式中，为了减小各锁定块331与缸体32内壁相抵时对缸体32内壁造成损伤，每一个锁定块331可以包括刚性部和柔性部，且每一个锁定块331中，柔性部位于刚性部背离环形凹槽槽底的一侧、且固定于刚性部。
进一步，为了提高各锁定块331锁定上述活塞杆31和缸体32时的稳定性，多个锁定块331沿活塞杆31的轴心线的周向均匀分布。
为了增大各锁定块331与缸体32相抵时的接触面积，一种具体实施方式中，当活塞杆锁定机构33处于解锁位时，多个锁定块331缩回至环形凹槽后相互拼接形成一封闭环形结构。
当然，上述车座升降装置中的活塞杆锁定机构33还可以为其他的结构形式，如，活塞杆锁定机构33还可以包括：
设置于缸体体壁、且开口位于缸体内壁的容纳槽；
设置于容纳槽内、且套设于活塞杆外侧的环形气囊结构，当环形气囊内充入设定量的气体后，环形气囊充满容纳槽且抱紧活塞杆；
与环形气囊内部连通的第二气源装置。
环形气囊能够在第二气源装置的控制下膨胀或者收缩，进而能够实现对缸体32和活塞杆31的锁定和接触锁定。
本发明实施例还提供了一种自行车，该自行车包括车体，还包括上述实施方式中提供的任意一种车座升降装置。
具有上述车座升降装置的自行车，骑乘者能够方便快捷地对自行车的车座的高度进行调节。
最后应说明的是：以上实施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例技术方案的精神和范围。

Claims (10)

  1. 一种车座升降装置，其特征在于，包括：
    气缸，所述气缸包括缸体、活塞杆以及活塞杆锁定机构，其中，所述缸体和所述活塞杆中的一个安装于车体，另一个安装于车座；当所述活塞杆锁定机构处于锁紧位时锁定所述活塞杆与所述缸体之间的相对位置；
    第一气源装置，第一气源装置的出气口与所述缸体的进气口连通以控制所述缸体内气压；
    控制模块，所述控制模块与所述第一气源装置以及所述活塞杆锁定机构信号连接、以控制所述第一气源装置与所述活塞杆锁定机构动作。
  2. 根据权利要求1所述的车座升降装置，其特征在于，所述气缸中，所述缸体固定于所述车体，所述车座安装于所述活塞杆的外伸端。
  3. 根据权利要求1所述的车座升降装置，其特征在于，所述气缸中，所述活塞杆的外伸端固定于所述车体，所述自行车的车座安装于所述缸体。
  4. 根据权利要求1-3任一项所述的车座升降装置，其特征在于，所述活塞杆锁定机构包括：
    设置于所述活塞杆处于缸体内部位上的环形凹槽；
    安装于所述环形凹槽内的多个锁定块，各所述锁定块朝向所述活塞杆伸出端的侧面与所述环形凹槽的侧壁相抵且滑动配合；当所述活塞杆锁定机构处于解锁位时，每一个所述锁定块缩回至所述环形凹槽内；当所述活塞杆锁定机构处于锁紧位时，各所述锁定块探出所述环形凹槽且与缸体的内壁相抵；
    驱动所述锁定块动作的第一驱动机构，所述第一驱动机构与所述控制模块信号连接。
  5. 根据权利要求4所述的车座升降装置，其特征在于，所述活塞杆设置所述环形凹槽的部位具有中空结构，且所述第一驱动机构包括：
    安装于所述活塞杆中空结构内的驱动电机，所述驱动电机的输出轴上同轴固定有螺纹丝杠；
    套设于所述活塞杆上、且位于所述环形凹槽内的驱动环，所述驱动环与所述环形凹槽的槽底滑动配合；
    与所述锁定块一一对应的传动杆，每一个传动杆的一端与所述驱动环铰接，另一端与其对应的锁定块铰接；
    位于所述中空结构内、且与所述螺纹丝杠螺纹配合的滑块，所述中空结 构的侧壁上设有多个沿所述活塞杆轴心线方向延伸的槽孔；
    与所述槽孔一一对应的连接杆，每一个所述连接杆的一端与所述滑块固定连接、且另一端穿过所述槽孔后与所述驱动环固定连接，当所述驱动电机动作时驱动所述滑块以及所述驱动环沿活塞杆的轴心线移动，进而驱动锁定块在环形凹槽的侧壁上滑动伸出或缩回所述环形凹槽。
  6. 根据权利要求4所述的车座升降装置，其特征在于，每一个所述锁定块包括刚性部和柔性部，且每一个所述锁定块中，所述柔性部位于所述刚性部背离所述环形凹槽槽底的一侧、且固定于所述刚性部。
  7. 根据权利要求4所述的车座升降装置，其特征在于，多个所述锁定块沿所述活塞杆的轴心线的周向均匀分布。
  8. 根据权利要求4所述的车座升降装置，其特征在于，当所述活塞杆锁定机构处于解锁位时，多个所述锁定块缩回至所述环形凹槽后相互拼接形成一封闭环形结构。
  9. 根据权利要求1所述的车座升降装置，其特征在于，所述活塞杆锁定机构包括：
    设置于所述缸体体壁、且开口位于所述缸体内壁的容纳槽；
    设置于所述容纳槽内、且套设于所述活塞杆外侧的环形气囊结构，当所述环形气囊内充入设定量的气体后，所述环形气囊充满所述容纳槽且抱紧所述活塞杆；
    与所述环形气囊内部连通的第二气源装置。
  10. 一种自行车，包括车体与车座，其特征在于，还包括如权利要求1-9任一项所述的车座升降装置，其中：
    所述车座升降装置的缸体和活塞杆中的一个安装于车体，另一个安装于车座。
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