Cutlery – Razors – Combined
Patent
1992-01-08
1993-11-30
Phan, Hien H.
Cutlery
Razors
Combined
30223, B26B 1906
Patent
active
052653366
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a long-hair trimming device for dry shaving apparatus, with a stationary cutting comb provided with a bent flange on its rear side, with a toothed blade assembly capable of reciprocating longitudinally thereof in a rectilinear direction and urged there-against by means of springs, and with a spring mounting means fastened to the flange and providing the abutment for the springs.
In the course of their development, long-hair trimming devices of this type which, for example, are known from German Pat. No. 2,019,978 have reached a high standard of engineering with regard to their function. Under the aspect of mass production, however, deficiencies were revealed which are suited to send up the manufacturing cost unnecessarily, in addition to adversely affecting the function of the long-hair trimming device. Thus, the device disclosed in the above-referenced literature necessitates an assembly in batches requiring the individual components to be introduced consecutively as on a string. This type of assembly is time-consuming, presenting an impediment to an automated assembly as aimed at nowadays for cost reasons. It is, therefore, an object of the present invention to provide a long-hair trimming device of the type referred to in the prior-art portion which, while providing a high standard of performance, requires only a small number of preassembly and final assembly steps, resulting in a further improvement of the economy of manufacture without impairing the function.
In the long-hair trimming device of the invention, preassembly involves no more than the step of inserting the springs in the spring mounting means, and final assembly is limited to the placement of the blade assembly into the angle of the cutting comb, followed by engagement of the knobs on the spring mounting means into the flange of the cutting comb. This knob engagement operation brings the blade assembly into its working position immediately, the teeth of comb and blade are urged against each other, and all possibilities of movement except the working movement are restricted, eliminating adverse effects that may be caused by manufacturing-related properties of components outside the assembly "long-hair trimming device" as, for example, tolerances of casing parts. The possibilities of an automated assembly are obvious.
While the use of a lever or the like for transmitting the spring force to the area proximate to the teeth of the blade assembly is in principle known from literature (German Pat. No. 2,836,959, U.S. Pat. No. 4,118,863), this is not the case with long-hair trimming devices of the type referred to in the prior-art portion and with a different special configuration; this idea alone is therefore not suited to accomplish the object of the invention.
Advantageously, the spring mounting means with their associated angle levers are integrally formed of plastic, and the joint between the two components is configured as a film hinge. Consequently, the spring mounting means occurs as a single component already in its manufacture and need not be assembled in a separate assembly operation as is the case, for example, in the device disclosed in U.S. Pat. No. 4,118,863.
An advantageous configuration of the rearward abutment provide the blade assembly at two locations, that is, on the flange of the cutting comb and on the spring mounting means, such that the locations, rather than relating to outside components as, for example, casing shells, relate only to components of the long-hair trimming device.
One embodiment of the present invention is illustrated in the accompanying drawing.
In the drawing,
FIG. 1 is a front view--right-hand part of the illustration--and a rear view--left-hand part of the illustration--of a long-hair trimming device for dry shaving apparatus; and
FIG. 2 is a sectional view taken along the lines 2--2 of FIG. 1.
Referring to the drawing, and particularly to FIG. 1, the structure of the long-hair trimming device shown is in principle symmetrical to the center line A, comprising a cutting comb 1
REFERENCES:
patent: 4118863 (1978-10-01), Sandy
patent: 4233733 (1980-11-01), Gallanis
patent: 4262415 (1981-04-01), Braun
patent: 4274199 (1981-06-01), Gallanis
patent: 4283848 (1981-08-01), Aktiengesellschaft
patent: 4803780 (1989-02-01), Locke et al.
patent: 4866843 (1989-09-01), Kumano
patent: 4932121 (1990-06-01), Jestadt et al.
Braun Aktiengesellschaft
Heyrana Sr. Paul M.
Phan Hien H.
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