轮椅推手与护理接口的人机评价

结论：轮椅有两个使用者，推轮椅的那个常被忘掉

轮椅的评价通常围绕乘坐者展开——坐姿、压力分布、稳定性、操控。

但很多轮椅是由护理者推的，而护理者也是使用者。

护理者与轮椅的接触界面主要是： 推手、制动操作件、折叠操作件、倾倒踏杆、脚踏板操作、调节机构。

这些界面的设计直接影响：

护理者的腰背负荷。 推手高度不合适会导致弯腰或耸肩。

操作的安全。 上下坡、过坎时的控制能力。

操作的效率。 频繁操作的便利程度。

长期健康。 长期不良姿势导致的职业性损伤。

护理者的腰背损伤在这个行业是实际存在的问题，而轮椅的设计对此有直接影响。

护理者的主要使用场景

场景	动作	负荷特点
平地推行	水平推力	持续、量级低
上坡	推力加体重前倾	持续、量级高
下坡	制动控制	持续、需控制
过坎上台阶	倾倒加提举	瞬时、量级高
转弯	侧向力	间歇
折叠搬运	提举	瞬时、腰背负荷大
装车	提举加扭转	高风险动作

「装车」是腰背负荷最大的动作 ——提举加扭转的组合是腰椎损伤的高风险动作模式，而这个动作对户外使用的轮椅几乎每天都要做。

推手的评价维度

高度。 推手高度与护理者身高的匹配。

可调性。 能否适应不同身高的护理者。

角度。 握持时手腕的角度。

握持直径。 手握的粗细。

表面。 防滑、触感、温度（户外金属件）。

间距。 两侧推手的间距与肩宽的关系。

「高度可调」对多护理者场合很重要 ——机构中不同身高的护理人员共用同一台轮椅，固定高度必然不适合一部分人。

可测量的指标

人机评价不全是主观的，有些指标可以测量：

推行所需的力。 平地、坡道上的推力。

制动所需的力。 下坡时的制动控制力。

倾倒所需的力。 过坎时踩踏杆和下压推手的力。

提举重量。 折叠后的重量和提举点位置。

操作件的操作力。 制动杆、折叠锁的操作力。

推手高度范围。 可调范围与人群身高的对应。

手腕角度。 握持时的腕部偏离中立位的角度。

「手腕角度」是容易量化但常被忽略的指标 ——推手角度使手腕长时间处于偏离中立位的姿势，是腕部劳损的原因之一。

主观评价的组织

评价者的选取。 覆盖不同身高、性别、经验的护理者。

场景的设置。 覆盖典型的使用场景。

评价的维度。 舒适、省力、可控、安全感。

对比评价。 与现有产品对比比绝对评分可靠。

疲劳的考察。 短时试用感觉不到的问题在长时间使用中会出现。

「对比评价」比绝对评分可靠 ——让评价者直接比较两个产品，比让他们给单个产品打分能得到更一致的结果。

设计上的常见问题

推手高度固定且偏低。 导致护理者弯腰。

推手角度不合理。 手腕偏离中立位。

握持部分过细或过粗。 影响握力和舒适。

防滑不足。 出汗或下雨时打滑。

倾倒踏杆位置不当。 踩踏时需要不自然的姿势。

制动操作件位置不便。 需要松开推手才能操作，这在下坡时是危险的。

折叠后无合适提举点。 提举时姿势不良。

整机过重。 提举负荷大。

「制动操作件需要松开推手」是设计上的实际问题 ——下坡时护理者需要同时控制方向和制动，如果操作制动必须松开一只手，控制就不稳。

折叠与搬运的评价

折叠的操作力。 折叠和展开所需的力。

折叠的步骤数。 步骤越多越不便。

折叠后的尺寸。 影响装车和存放。

折叠后的重量。 直接影响提举负荷。

提举点的设置。 是否有合适的握持位置。

提举时的重心。 重心位置影响提举姿势。

折叠后的稳定。 折叠状态能否立稳不倒。

「折叠后能否立稳」是实用的细节 ——折叠后如果不能自己立住，护理者需要一直扶着或者靠墙，装车时很不方便。

与乘坐者需求的平衡

有些设计对两者的需求是冲突的：

推手高度。 高推手省护理者的力，但可能影响乘坐者的靠背感受和外观。

整机重量。 轻便利于护理者搬运，但可能影响强度和稳定性。

轮径。 大轮利于越障但增加折叠尺寸。

折叠机构。 便于折叠的机构可能增加旷量。

这些冲突需要在产品定位下做取舍，评价时应当把两方面的指标都记录下来，便于判断取舍是否合理。

常见的准备不足

信息不全。 材料、工艺、使用环境的信息缺失，导致方案设计缺乏依据。

样品不具代表性。 试制样品或挑选样品，与量产状态有差距。

条件未明确。 测试条件没说清楚，数据的适用范围就不明确。

只看初始值。 忽略了环境和时间作用后的性能变化。

项目不完整。 遗漏了必要的项目，提交时才发现。

这五项在实际委托中出现频率较高，建议在项目启动时逐项确认，因为它们造成的返工成本远高于事前确认所花的时间。

数据的组织与保存

记录的完整性。 条件、方法、设备、样品状态、实测值。

可追溯性。 数据与样品批次、生产批次的关联。

保存期限。 覆盖产品的生命周期。

检索的便利。 需要时能快速定位。

版本的管理。 数据更新时的版本控制。

建议建立统一的数据台账，记录每组数据的来源、条件、适用范围和有效期。数据积累起来之后，后续的产品开发和变更评估都能受益。

我们的做法

做轮椅的人机相关评价时，我们会把护理者侧的指标一并记录 ——推行力、制动操作力、倾倒力、折叠后重量和提举点，这些数据对产品改进有直接价值。

推手高度我们按可调范围记录并对应到身高区间，便于判断能覆盖多大范围的护理人群。

对于折叠机构，我们会记录操作力、步骤数和折叠后的稳定性，因为这三项直接影响日常使用的便利。

如果产品在护理者侧存在明显的设计问题，我们会在沟通中指出 ——比如制动操作需要松开推手这类会影响安全的设计。

如果你的轮椅需要做护理接口相关的评价，可以把产品和使用场景发过来一起定方案，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. Wheelchair assessment generally centres on the occupant: seating posture, pressure distribution, stability and control. Yet many wheelchairs are pushed by a carer, and the carer is a user too. The carer's interfaces with the chair are principally the push handles, the brake controls, the folding controls, the tipping lever, the footrest controls and the adjustment mechanisms. These interfaces directly affect the carer's back loading, since unsuitable handle height forces stooping or shrugging; operational safety, through control on slopes and over obstacles; operational efficiency, through the convenience of frequent operations; and long-term health, through occupational injury from sustained poor posture. Back injury among carers is a real problem in this sector, and wheelchair design bears on it directly.

The carer's main situations. Pushing on the level requires horizontal force, sustained and modest. Ascending slopes requires force plus forward lean, sustained and substantial. Descending slopes requires braking control, sustained and demanding. Negotiating kerbs requires tipping plus lifting, momentary and substantial. Turning requires lateral force, intermittently. Folding and carrying requires lifting, momentary with heavy back loading. And loading into a vehicle requires lifting plus twisting, a high-risk movement. Vehicle loading carries the heaviest back loading: lifting combined with twisting is the high-risk pattern for lumbar injury, and for an outdoor chair it happens almost daily.

Assessing push handles. Height, matched to the carer's stature. Adjustability, covering whether it suits carers of different heights. Angle, covering the wrist posture when gripping. Grip diameter, covering the thickness of the handle. Surface, covering grip, feel and temperature on outdoor metal parts. And spacing, relating the two handles' separation to shoulder width. Height adjustability matters greatly in shared settings: carers of different heights share one chair in an institution, and a fixed height necessarily suits only some of them.

Measurable indicators. Ergonomic assessment is not wholly subjective and some indicators can be measured. Pushing force on the level and on slopes. Braking force for control on descents. Tipping force for pressing the lever and bearing down on the handles at a kerb. Lifting weight, being the folded mass and the position of the lifting points. Control operating forces for brake levers and folding latches. Handle height range, relating the adjustment range to population stature. And wrist angle, being the deviation from neutral when gripping. Wrist angle is readily quantified and commonly overlooked: handle angles that hold the wrist away from neutral for long periods contribute to wrist strain.

Organising subjective assessment. Select assessors spanning different heights, sexes and levels of experience. Set up situations covering the typical uses. Assess across comfort, effort, controllability and sense of security. Use comparative assessment, which is more reliable than absolute scoring. And examine fatigue, since problems imperceptible in brief trials emerge over longer use. Comparative assessment is more reliable than absolute scoring: asking assessors to compare two products directly yields more consistent results than asking them to score one.

Common design problems. Fixed handles set low, forcing carers to stoop. Unsuitable handle angles, holding the wrist away from neutral. Grips too thin or too thick, affecting grip strength and comfort. Inadequate slip resistance, which fails with sweat or rain. Poorly placed tipping levers, requiring an unnatural posture. Inconveniently placed brake controls, requiring a hand off the handle, which is hazardous on a descent. No suitable lifting point when folded, forcing poor posture. And excessive mass, increasing the lifting load. Brake controls requiring a hand off the handle is a real design problem: descending a slope requires steering and braking together, and if braking means releasing one hand, control becomes unsteady.

Assessing folding and carrying. Folding force for folding and unfolding. Number of steps, since more steps mean less convenience. Folded dimensions, affecting vehicle loading and storage. Folded mass, which sets the lifting load directly. Lifting points, covering whether suitable grips exist. Centre of gravity when lifting, which affects lifting posture. And folded stability, covering whether it stands unaided. Whether it stands folded is a practical detail: a chair that will not stand on its own leaves the carer holding it or leaning it against a wall, which is inconvenient when loading a vehicle.

Balancing against occupant needs. Some design choices conflict between the two. Handle height: higher handles save the carer effort while possibly affecting the occupant's backrest experience and the chair's appearance. Mass: lighter suits carrying while possibly affecting strength and stability. Wheel diameter: larger wheels negotiate obstacles better while increasing folded size. Folding mechanisms: easier folding may introduce free play. These conflicts require trade-offs under the product's positioning, and assessment should record indicators for both sides so that the trade-off can be judged.

How we handle it. In ergonomic-related wheelchair assessment we record the carer-side indicators too, covering pushing force, brake operating force, tipping force, folded mass and lifting points, which have direct value for product improvement. We record handle height as an adjustment range mapped to stature bands, so that the proportion of the carer population covered can be judged. For folding mechanisms we record operating force, number of steps and folded stability, since these three bear directly on daily convenience. And where a product has an evident design problem on the carer side we raise it in discussion, brake controls requiring a hand off the handle being one that affects safety.

If your wheelchair needs carer-interface assessment, send us the product and its situations of use and we will settle the approach: +86 132 4819 8029.