Supports – Brackets – Adjustable
Patent
1990-11-29
1992-06-30
Ramirez, Ramon O.
Supports
Brackets
Adjustable
248921, 248922, 403158, 403161, E04G 300
Patent
active
051256100
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an information processing device in the form of a portable case comprising, a main body with a base intended to receive a power supply and processing circuits and, screen and/or keyboard dialogue means which are disposed in a flat box connected to the main body by means for supporting it and holding it in an angular position, which are adjustable both in height and angularly.
Generally, in the known apparatus of this kind the screen is connected to the main body via at least one lever articulated to the main body and to the screen by two respective articulations spaced apart and directed parallel to each other. In this case, the screen is held in position by friction linings acting at the level of the articulations.
This method of holding in the angular position has numerous drawbacks.
Thus, in the case where it is desired to obtain firm holding in position, linings should be used providing a high friction coefficient. It is then ascertained that the force to be exerted for carrying out an adjustment becomes high and that further, because of the preponderance of the static friction coefficient with respect to the dynamic friction coefficient, it becomes practically impossible to obtain accurate adjustment.
Furthermore, when it is desired to bring the screen into a top position, the traction effected on the screen causes an elevation of the main body without obtaining the desired result.
The purpose of the invention is particularly to overcome these drawbacks.
It provides an apparatus of the above type characterized in that the adjustable holding means are disposed coaxially to a pivoting axis XX' of at least one support arm articulated on the main body and comprise a free wheel device directed so as to allow a free elevation of the flat box with respect to the main body, said free wheel device being placed mechanically in series with an angular friction coupling device, these two devices being themselves coaxial with each other.
It is clear that, with such an arrangement, it is possible to raise the flat box without meeting any substantial resistance and without risking raising the main body. On the other hand, the force required for lowering the flat box takes place in the direction of the base of the main body, which rests on a working surface. This force may then be relatively high without any drawback resulting therefrom.
Embodiments of the invention will be described hereafter, by way of non limitative examples, with reference to the accompanying drawings in which:
FIG. 1 is a schematic side view of a processing device in a case;
FIG. 2 is a schematic axial section of an articulation of the apparatus shown in FIG. 1, equipped with a free wheel device and an angular friction coupling device;
FIG. 3 is an axial section on a larger scale of the free wheel device used in FIG. 2;
FIG. 4 is a cross section of two variants of friction linings which can be used in the articulation shown in FIG. 2, one of the variants being situated on side a of the Figure whereas the other variant is shown on side b;
FIG. 5 shows, in a partial schematic perspective, a free wheel device using a helical spring;
FIGS. 6 and 7 show schematically in partial axial sections two variants of a friction coupling device whose friction surfaces are placed perpendicularly to the articulation axis XX'.
FIG. 8 is an axial section of an assembly comprising a free wheel device of the type shown in FIG. 5 and a friction coupling device with conical friction surfaces;
FIG. 9 is a schematic view in exploded perspective of another embodiment of an arm-screen articulation device comprising a free wheel device and a friction coupling device.
In the example shown in FIG. 1, the information processing apparatus 1 comprises a main body 2 housing a power supply 3 and processing circuits 4, a terminal 5 comprising a keyboard 6 and a screen 7 and means 8, respectively 9, for connecting the latter mechanically and electrically to the main body.
The main body comprises a handle 10 for transporting it and a base 11 for setti
REFERENCES:
patent: 3188679 (1965-06-01), Wubbe
patent: 4620808 (1986-11-01), Kurtin et al.
patent: 4624434 (1986-11-01), Lake, Jr. et al.
patent: 4781422 (1988-11-01), Kimble
patent: 4834329 (1989-05-01), Delapp
patent: 5000608 (1991-03-01), Schmidt
Drucker William A.
Ramirez Ramon O.
Telemecanique
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