How to design humanized garden tools

Garden tools are a kind of manual tools. Garden tools include gardening hoe, garden shovel, various pruning shears, tall tree shears and thick branch shears. The use of these tools is not only inseparable from our hands, but also more dependent on hands than general work. Therefore, when designing garden tools, it is necessary to consider the physiological characteristics of the hands and conform to humanized design principles.
    Ordinary garden tools, such as pruning shears, have added some functions on the basis of ordinary scissors. Although the purpose of pruning has been achieved, human and machine considerations are far from enough. The modified handle, which is a common handle, has a figure-eight shape. There are obvious defects in the structure and the ergonomic design is unreasonable. Neither the subjective experience in the actual use process nor the theoretical considerations have reached the optimal design effect. For example, in terms of theoretical mechanics, because the little finger is born short, the little finger of the figure-eight handle has no force at all, and it is doing useless work again and 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 perspective. This type of massage handle cover It can touch the nerves of each finger and is full of fun. In this way, the use function, artistic function, and health care function of the scissors product can be perfectly integrated to achieve the best design effect.
    Some garden tools are very good-looking but not practical. Due to the special nature of the garden tool's working object and its special requirements for the user, its design should meet 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, ulnar deviation, etc., it will cause the wrist tendon to stretch excessively. There will be wrist pain and reduced grip. When the wrist is operated straight, the wrist is relaxed in the middle, which can reduce fatigue.
    A pruning shear with a curved handle.The design of the handle is curved inward.This design eliminates the need for the fingers to bend much in the direction of the ulna.When cutting thin branches, you can place your finger on the recess of the scissors. The wrist is kept straight, and the maximum grip strength can also be achieved without bending the wrist joint, which achieves a labor-saving effect, which is particularly beneficial to home gardening operations.