1981-07-21
1984-06-12
Foss, J. Franklin
Supports
Stand
Plural leg
2481886, F16M 1138
Patent
active
044536860
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field:
This invention relates to a tripod for cameras, which is suitably used for photographing cameras and television cameras.
2. Background Art:
Almost all conventional tripods of this kind for cameras have only one leg-opening angle. There are an extremely small number of tripods which permit a leg-opening angle thereof to be regulated but all of such tripods have a very complicated construction, so that they cannot be handled easily.
3. Disclosure of Invention:
An object of this invention is to provide a simply-constructed tripod for cameras, which permits a leg-opening angle thereof to be regulated, and which can be handled easily.
In order to achieve the above object, this invention provides a tripod for cameras, comprising a tripod head, leg units each of which is oscillatably supported on the tripod head and each of which has projections at that end portion thereof which is above the oscillatably supported portion thereof, and regulators each of which is supported on a shaft in such a manner that the regulator is urged in a direction at right angles to the relative leg unit and each of which has alternately-arranged projections and recesses in that position thereon which is on the side of the tripod head and in opposition to the projections provided on the relative leg unit, the projections provided on the leg units coming into contact, when the leg units are opened in the usual condition, with the projections provided on the regulators, to thereby allow the leg units to be set at the most-frequently-used leg-opening angle, the projections provided on the leg units coming into engagement, when the leg units ae opened after the regulators have been displaced in the direction at right angles to the leg units against the urging forces applied thereto, with the recesses provided in the regulators, to thereby allow the leg units to be set at an increased leg-opening angle, the regulators which have been displaced in the mentioned manner being returned to their respective original positions when the leg units are thereafter closed.
In order to use in the usual condition the tripod of the above-described construction according to the present invention, the leg units thereof can be set at the most-frequently-used angle without carrying out any special operations therefor. Accordingly, the tripod can be used in a stable condition. Also, the tripod permits the leg units thereof to be opened at a larger angle to allow an object to be photographed at a low angle by a camera set thereon.
BRIEF DESCRIPTION OF DRAWINGS
The accompanying drawings show a mode of embodiment of this invention, wherein:
FIG. 1 is a partially cutaway front elevational view of a tripod;
FIG. 2 is a front elevational view of a part of the tripod;
FIG. 3 is an exploded view in perspective of a part of a part of the tripod;
FIG. 4 is a side elevational view in section of a part of the tripod;
FIG. 5 is a side elevational view in section of a part of the tripod with leg units thereof displaced;
FIG. 6 is a side elevational view in section of a part of the tripod with leg units thereof displaced;
FIG. 7 is a partially sectional view of a leg unit; and
FIG. 8 is an exploded view in perspective of a locking unit.
BEST MODE FOR CARRYING OUT THE INVENTION
The best mode for carrying out the invention will now be described. Leg units 2 are oscillatably supported via shafts 3 between support walls 1a, 1b, which are provided at a lower portion of a tripod head 1 in such a manner as to be extended in three directions. Each of the leg units 2 consists of main legs 2a, a first auxiliary leg 2b, and a second auxiliary leg 2c. The main legs 2a consist of two thinner pipes, which are joined at their respective both end portions to an upper connector 4a and a lower connector 4b, the upper connector 4a being supported via a shaft on the support walls 1a, 1b. The first auxiliary leg 2b consists of a tubular element, and is slidably held between the two thinner pipes constituting the main legs 2a, via a mounting bore (not shown)
REFERENCES:
patent: 3963207 (1976-06-01), Guasti
patent: 4196881 (1980-04-01), Davidson
Foss J. Franklin
Oujevolk George B.
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