结论：转移时轮椅要稳、要不动、要不挡路

转移指使用者在轮椅与床、马桶、汽车座椅、淋浴椅之间移动。这是轮椅使用中风险较高的环节 ——使用者离开了稳定的坐姿，重心在移动，支撑面在变化。

产品对转移安全的影响集中在三点：

稳。 转移时轮椅承受偏心载荷（使用者的重量集中在一侧），不能倾翻。

不动。 制动必须可靠，轮椅移动会直接导致跌倒。

不挡路。 扶手、脚踏、轮子不应妨碍转移路径。

这三点都可以测量和验证。

转移的方式

方式 特点 主要风险
独立站立转移 使用者自己站起移动 站立时失稳、轮椅移动
独立滑动转移 坐姿下横向移动 中途跌落、间隙掉落
借助转移板 板搭在两个座面之间 板滑脱、承重不足
一人协助 护理者搀扶 护理者与使用者同时失衡
两人协助 两人抬起或搀扶 协调不当
使用移位机 机械转移 设备相关风险

不同方式对产品的要求不同，比如滑动转移要求扶手可拆卸或可翻起、两个座面高度接近；站立转移要求制动可靠、扶手可承重。

稳定性的考察

偏心载荷下的稳定性。 使用者转移时重量集中在轮椅一侧，这个工况比均布载荷更严。

向前的稳定性。 站起时重心前移。

扶手受力时的稳定性。 使用者撑扶手起身时，力集中在扶手上。

脚踏受力时的稳定性。 踩在脚踏上起身（虽然不推荐但会发生）。

测试方法。 在座面边缘、扶手、脚踏分别施加载荷，评价倾翻阈值。

「踩脚踏起身」是明确不推荐但实际会发生的行为。 产品应当评估这种情况下的倾翻风险，并在说明书中明确警示。

制动的考察

转移时制动失效的后果是直接的跌倒：

制动力。 在偏心载荷和推力下轮椅是否移动。

制动的操作。 使用者能否自己操作制动、操作力是否合适。

制动的可辨识。 使用者能否确认制动已经起作用。

制动的位置。 是否在使用者可及范围内。

磨损后的制动力。 轮胎和制动件磨损后制动力下降。

在不同地面上的制动。 光滑地面、湿地面上的制动效果。

「使用者能否确认制动已起作用」是设计上的考虑点。 有明确的视觉或触觉反馈，比让使用者凭感觉判断要安全。

「磨损后的制动力」是长期风险。 制动器依靠压紧轮胎产生摩擦，轮胎磨损或气压下降后制动力明显下降，而这个变化是渐进的。

妨碍转移的因素

扶手。 固定扶手会挡住滑动转移的路径。可拆卸或可翻起的扶手对转移友好。

脚踏。 挡住脚部移动的空间。可摆开或可拆卸的脚踏更好。

轮子。 大轮可能挡住横向移动。

座面高度。 与目标座面的高度差影响转移难度。

座面宽度。 过宽增加移动距离。

间隙。 轮椅与目标座面之间的间隙，使用者可能掉入。

「间隙」是滑动转移的风险点。 轮椅与床之间如果有间隙，使用者在滑动过程中可能掉落。转移板的作用之一就是跨越这个间隙。

可测量的指标

偏心载荷下的倾翻阈值。 在座面边缘加载的倾翻角或力。

制动保持力。 制动状态下能承受的推力。

扶手的承载能力。 扶手承受向下和向外的力。

扶手拆卸或翻起的操作力。

座面高度。 以及可调范围。

转移路径的净空。 扶手移开后的可用宽度。

脚踏移开的便利性。 操作步骤和力。

这些指标测出来之后，可以在资料中给出，帮助专业人员判断产品是否适合某个使用者的转移方式。

验证的方法

静态载荷试验。 在各位置施加载荷，评价稳定性和强度。

制动试验。 在偏心载荷下施加推力，测量制动保持能力。

模拟转移试验。 用人体模型模拟转移过程中的载荷变化。

实际转移观察。 由使用者或治疗师实际操作，观察问题。

「实际转移观察」能发现台架试验发现不了的问题 ——比如某个部件的形状妨碍手的放置、某个高度不便于发力。

资料中应当说明的

支持的转移方式。 产品适合哪些转移方式。

扶手与脚踏的操作。 如何移开、如何复位。

转移前的检查。 制动、扶手状态。

座面高度的调节。 如何调到与目标座面匹配。

转移的注意事项。 包括不应踩脚踏起身这类警示。

需要协助的情形。

与转移辅具的配合

转移常借助辅具，配合关系要考虑：

转移板。 座面高度和形状是否便于搭板、扶手是否可移开。

转移带。 护理者使用的辅助带。

移位机。 吊兜的放置、移位机基座能否靠近轮椅。

扶手杆。 床边或墙面的扶手。

「移位机基座能否靠近」是实际问题。 轮椅的底架结构可能阻挡移位机的基座腿，导致无法靠近到合适位置。

使用者能力的匹配

转移方式与使用者能力要匹配，产品资料中可以说明：不同转移方式对产品配置的要求；推荐的座面高度范围；扶手的操作要求；以及需要护理者协助的情形。

这类信息对配置决策有帮助，因为同一款轮椅配不同的扶手，适用的转移方式可能不同。

数据在配置中的应用

转移相关的测量数据，在临床配置中的用途：判断产品是否适合使用者的转移方式；确定座面高度的设定；判断是否需要可拆卸扶手；以及评估是否需要护理者协助。

有数据支撑的配置决策比凭经验更可靠，特别是对转移能力处于边缘的使用者。

我们的做法

做轮椅测试时，我们建议把偏心载荷下的稳定性和制动保持力作为转移相关的重点项目，因为这两项对应的是转移中最直接的风险。

制动方面，我们建议在制动件和轮胎磨损后复测制动力，因为磨损导致的制动力下降是渐进的，使用者不易察觉，而这个数据能支撑更换周期的建议。

如果你有产品需要做转移安全相关的验证，可以把产品结构和目标使用方式发过来一起讨论，或者直接联系：132 4819 8029。检测能力见服务介绍，产品分类见手动轮椅检测与电动轮椅检测，案例见案例。

English version

Conclusion. Transfer means moving between a wheelchair and a bed, toilet, car seat or shower chair. It is among the higher-risk moments in wheelchair use: the user leaves a stable seated posture, the centre of gravity moves and the support surface changes. Product influence on transfer safety concentrates in three things. Stability, since the chair carries eccentric load as the user's weight concentrates on one side and must not tip. Immobility, since braking must hold, and a chair that moves causes a fall directly. And clearance, since armrests, footplates and wheels must not obstruct the transfer path. All three are measurable and verifiable.

Methods of transfer. Independent standing transfer, where the user stands and moves, risks instability while standing and chair movement. Independent sliding transfer, moving sideways while seated, risks falling mid-transfer or into a gap. Transfer board use, with a board bridging two seats, risks board slippage and inadequate load capacity. One-person assistance risks carer and user losing balance together. Two-person assistance risks poor coordination. And hoist transfer carries equipment-related risks. Different methods place different demands on the product: sliding transfer requires removable or swing-away armrests and similar seat heights, while standing transfer requires reliable braking and load-bearing armrests.

Examining stability. Stability under eccentric load matters because the user's weight concentrates on one side during transfer, which is more demanding than distributed load. Forward stability matters because the centre of gravity moves forward when standing. Stability under armrest loading matters because force concentrates on the armrest when the user pushes up. Stability under footplate loading matters because users do stand on footplates, though it is not recommended. And test methods apply load at the seat edge, armrest and footplate respectively and assess the tipping threshold. Standing on the footplate is clearly discouraged and nonetheless happens: the product should assess the tipping risk in that situation and the instructions should warn explicitly.

Examining braking. Brake failure during transfer causes a fall directly. Braking force covers whether the chair moves under eccentric load and applied push. Brake operation covers whether the user can apply it and whether the force is appropriate. Brake state indication covers whether the user can confirm that the brake has engaged. Brake position covers whether it is within the user's reach. Braking force after wear covers the reduction as tyres and brake components wear. And braking on different floors covers performance on smooth and wet surfaces. Letting the user confirm engagement is a design consideration: clear visual or tactile feedback is safer than leaving the user to judge by feel. Braking force after wear is a long-term risk: brakes work by pressing against the tyre, and as the tyre wears or loses pressure the force falls markedly through a gradual change.

Factors obstructing transfer. Armrests obstruct the path of a sliding transfer when fixed; removable or swing-away armrests suit transfer better. Footplates obstruct foot movement; swing-away or removable footplates are better. Wheels may obstruct lateral movement, particularly large ones. Seat height relative to the target surface affects difficulty. Seat width affects the distance to be covered. And the gap between chair and target surface is a hazard into which the user may fall. The gap is the hazard in sliding transfers: where a gap exists between chair and bed, the user may fall during the slide, and bridging that gap is one purpose of a transfer board.

Measurable indicators. The tipping threshold under eccentric load, as an angle or force applied at the seat edge. Brake holding force, meaning the push force the applied brake resists. Armrest load capacity in downward and outward directions. The force to remove or swing away an armrest. Seat height and its adjustment range. Transfer path clearance once the armrest is moved. And ease of moving the footplate, covering steps and force. Measured and stated in the documentation, these help professionals judge whether a product suits a particular user's method of transfer.

Verification methods. Static load testing applies load at each position and assesses stability and strength. Brake testing applies push force under eccentric load and measures holding capability. Simulated transfer testing uses a dummy to reproduce load changes through the transfer. And observed transfers, performed by users or therapists, reveal problems in practice. Observation finds what bench testing cannot: a component shape that obstructs hand placement, or a height that makes it hard to apply force.

What the documentation should state. Which transfer methods the product supports. How to move and replace armrests and footplates. Checks before transfer covering brakes and armrest state. How to adjust seat height to match the target surface. Precautions during transfer, including the warning against standing on footplates. And the situations requiring assistance.

How we handle it. In wheelchair testing we suggest treating stability under eccentric load and brake holding force as the priority transfer-related items, since they correspond to the most direct risks during transfer. On braking we suggest re-measuring force after brake components and tyres have worn, since the decline is gradual and users do not readily notice, and that data supports recommended replacement intervals.

Send us the construction and intended transfer methods and we will work through the verification. Phone or WeChat: +86 132 4819 8029.