Garden tools are a kind of hand tools. Garden tools include gardening hoe, gardening shovel, all kinds of pruning shears, tall tree shears and thick branch shears. The use of these tools is not only inseparable from our hands, but also relies on hands more than ordinary work. Therefore, when designing garden tools, it is necessary to consider the physiological characteristics of the hands and conform to the humanized design principles.
Ordinary garden tools such as pruning shears are based on ordinary scissors. Although the purpose of pruning has been achieved, the human and machine considerations are far from enough. The handle before the improvement, that is, the common handle has a figure eight shape, the structure is obviously improper, the man-machine design is unreasonable, neither the subjective feelings in the actual use process nor the theoretical scrutiny have achieved the best design effect. For example, in terms of theoretical mechanics, because the little finger is inherently short, the figure-of-eight handle does not exert any force on the little finger at all, and is doing useless work again and again.
Considering that the application of fingers has unlimited potential, in addition to making full use of each finger, it can also take into account the use of fingers of different sizes. The handle cover of the scissors combines the massage ball used by the elderly from a functional point of view. This massage handle cover It can touch the nerves of every finger and is full of fun. In this way, the use function, artistic function and health function of the scissors product can be perfectly integrated to achieve the best design effect.
Some garden tools are designed to be very beautiful, but not practical. Due to the particularity of garden tools and their special requirements for users, their design should be more in line with the physiological structure of the hand. In the anatomical principles of the hand, it is required to keep the wrist straight when using hand tools. When the wrist deviates from its middle position and is in an awkward state such as palm flexion, dorsiflexion, and ulnar deviation, it will overstretch the wrist tendons. This will cause sore wrists and reduced grip strength. When the wrist is operated straight, the wrist is in a relaxed state in the middle, which can reduce fatigue.
A pruning shear with a curved handle. The handle is designed to bend inward. This design makes the fingers do not need to bend a lot in the direction of the ulna. When cutting thin branches, you can put your fingers in the recesses on the scissors. The wrist is kept straight, and the maximum grip strength can also be exerted without having to bend the wrist joint, and the effect of labor saving is achieved, which is particularly beneficial for home gardening.

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