Cutlery – Cutting tools – Plural cooperating blades
Patent
1996-05-02
1998-03-03
Payer, Hwei-Siu
Cutlery
Cutting tools
Plural cooperating blades
30256, 30260, 30341, B26B 1312
Patent
active
057221715
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to scissors, particularly hairdresser's scissors, with two scissor blades connected to each other in articulated fashion by means of a single pivot, and two scissor handles, each of which displays two handle sections, where the first handle section is connected to its corresponding scissor blade and the second handle section includes the grip end of the neck of the scissors, and where the two corresponding handle sections are connected to each other in articulated fashion in the plane of the handle.
Scissors of this kind are known from DE-PS 74 279. The scissors described therein are scissors of folding design, where a spring provided on each second handle section fits into a notch provided on the respective first handle section, thus locking the two handle sections together.
Other scissors of the type mentioned at the beginning are described in FR 582 786.
Particularly in the case of scissors used frequently for work, such as hairdresser's scissors, it is desirable, for ergonomic reasons, to match the position of the handle loops in relation to the direction of the scissor blades and the distance between the handle loops to the respective anatomical and work-related conditions of the person using the scissors. Conventional hairdresser's scissors frequently lead to an unnatural posture of the arm or flexion of the hand. This can easily lead to cramps. As can be observed in practice, this is then compensated for by bending at the hips or knees. This typical hairdresser's working posture can, however, lead to impaired and damaged health, particularly in the long term, including damage to the spine.
Therefore, the task of the present invention is to create a pair of scissors, particularly hairdresser's scissors, which guarantee ergonomic adaptation to different anatomical conditions and working methods in practice.
SUMMARY OF THE INVENTION
According to the invention, the task is solved by the fact that the scissors are designed according to the type mentioned at the beginning, where the respective first and second handle sections can be locked in position at various angles in relation to each other, and are locked at the pivot connection of the handle sections.
On account of the design according to the invention, the angular position of the scissor handles in relation to the scissor blades can be set individually, so that the position of the handle loops in relation to the direction of the scissor blades and the distance between the handle loops can be matched ergonomically to the anatomical prerequisites and working method of the person using the scissors. In particular, the scissors can be set optimally for both right and left-handed users. Furthermore, they can be adjusted to match the size of the hand and fingers of the person using the scissors, in order to prevent cramps occurring in the muscles of the hand. Finally, the scissors according to the invention also allow a natural posture of the arm and/or flexion of the hand of the respective person when working.
Locking of the handle sections of a scissor handle over a certain range of angles is known from U.S. Pat. No. 919,211. In order to allow locking over a certain range of angles, the second handle section, which bears the handle loop for the thumb, displays an area which bulges out to the side and has a slit curved concentrically in relation to the pivot connecting the two handle sections. A locking screw located on the first handle section protrudes through this slit in order to lock the two handle sections in the desired angular position.
Angle setting on just one scissor handle and the device provided for locking the two handle sections are not suitable for solving the task in hand, particularly in the case of hairdresser's scissors. The bulging area can barely be designed in such a way that an accurate and constant stop is guaranteed at different angular settings of the second handle section, which is particularly necessary in the case of precision scissors in order to be able to close the sc
REFERENCES:
patent: 2758372 (1956-08-01), Gammons
patent: 3906630 (1975-09-01), Megna
patent: 5109608 (1992-05-01), Pracht
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