EP0183065A2 - Lampe de bureau - Google Patents

Lampe de bureau Download PDF

Info

Publication number
EP0183065A2
EP0183065A2 EP85113677A EP85113677A EP0183065A2 EP 0183065 A2 EP0183065 A2 EP 0183065A2 EP 85113677 A EP85113677 A EP 85113677A EP 85113677 A EP85113677 A EP 85113677A EP 0183065 A2 EP0183065 A2 EP 0183065A2
Authority
EP
European Patent Office
Prior art keywords
rods
base part
desk lamp
lamp according
lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85113677A
Other languages
German (de)
English (en)
Other versions
EP0183065B1 (fr
EP0183065A3 (en
Inventor
Fritz Sträter
Uwe Sträter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19843443505 external-priority patent/DE3443505A1/de
Priority claimed from DE19853512145 external-priority patent/DE3512145A1/de
Application filed by Individual filed Critical Individual
Priority to AT85113677T priority Critical patent/ATE49801T1/de
Publication of EP0183065A2 publication Critical patent/EP0183065A2/fr
Publication of EP0183065A3 publication Critical patent/EP0183065A3/de
Application granted granted Critical
Publication of EP0183065B1 publication Critical patent/EP0183065B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • F21S6/003—Table lamps, e.g. for ambient lighting for task lighting, e.g. for reading or desk work, e.g. angle poise lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/26—Pivoted arms
    • F21V21/28—Pivoted arms adjustable in more than one plane
    • F21V21/29—Pivoted arms adjustable in more than one plane employing universal joints

Definitions

  • the invention relates to an electric desk lamp or the like, which has a hinged cantilever arm which struts from a base part and carries a hinged lamp on its free end part.
  • the lamp In all cases, however, after pivoting the cantilever arm relative to the base part, the lamp must also be manually adjusted relative to the cantilever arm so that it is directed downward so as not to dazzle, but there is a risk that the cantilever arm relative to the base part is pivoted again from the preselected position.
  • cantilever arms are known from rods connected in parallelogram-like fashion by means of axis joints, in which the lamp always remains in the previously set direction relative to the base surface when the cantilever arm is pivoted relative to the base part.
  • Such cantilever arms can not be pivoted sideways relative to the base part and require an additional swivel joint with a vertical axis of rotation, provided that the lamp should also be adjustable sideways without having to change the position of the base part.
  • the supply of the supply line is relatively problematic if the supply line is to be passed through the base part, because when the cantilever arm is rotated relative to the base part, the electrical supply line is then also twisted and possibly damaged.
  • the object of the invention is now to improve a desk lamp 'or the like of the type specified in the preamble of claim 1 in such a way that the cantilever arm can be pivoted in all directions to a limited extent relative to the base part and at the same time also simplifies handling for the lamp.
  • the cantilever arm consists of at least three identical rods which are parallel to one another, each of these rods is articulated in a spherically pivotable manner on the base part and on the lamp, and that mutually exclusive joints are arranged to prevent twisting of the rods.
  • the lamp is always adjusted parallel to the base part when pivoting the cantilever arm relative to the base part, regardless of the direction, so that the originally selected direction of the lamp to the base surface is always retained.
  • a preferred, technically particularly inexpensive and at the same time robust design of the table lamp described above is characterized in that spherical thickenings are arranged on all rods, both in the area of the base part and the lamp at a distance from the rod end, each in the base part or at
  • the lamp arranged, spherical cap-like and more or less to the spherical thickenings can be pivotally clamped mountings, and that preferably at the ends of all rods, both in the area of the base part and in the area of the lamp each have a two-axis joint with a first for longitudinal extension of the rods is directed at a right-angled hinge axis and is arranged with a second hinge axis oriented at right angles to the latter and to the associated rod and that the free ends of the second hinge axis are rotatable at each end of the cantilever arm in a common, rigid connection member r are stored.
  • first axes of the two-axis joints are arranged diametrically penetrating the rods and that , in the web of the this-facing end portion of the second hinge shaft is rotatably supported at each erstencGelenk a chs e the flanges of a U-shaped member are hinged.
  • a preferred design of the holder for the spherical thickening of the rods is characterized in that a bore is arranged in the facing wall parts of the base part and the lamp for each rod, the diameter of which is on the one hand larger than the diameter of a rod and on the other hand slightly smaller than that is the largest diameter of a spherical rod thickening, furthermore, each of the aforementioned wall parts is assigned a pressure plate which can be clamped to the latter, in which the bores of the aforementioned wall parts are arranged in the form, dimension and position of the same bores and that the rods are each a pair opposite one another Reach through holes, while the rod thickenings between the hole edge parts of the wall part and pressure plate bores are arranged so that the pressure plates are preferably arranged within the base part or the lamp.
  • brackets including the devices preventing a rotation of the rods relative to one another, are securely shielded from the outside without additional means and measures being required, which also results in a high level of functional reliability of the entire adjustment mechanism.
  • tubes can be provided as rods through which the electrical leads are passed.
  • the rods are made of electrically conductive material, the rods on the base part and on the lamp are held in an electrically insulated manner, and in particular are arranged within the base part and the lamp Conductor connection devices have, so that electrical lines are unnecessary in the aforementioned area.
  • Another object of the invention is to improve the desk lamp described above in such a way that while maintaining the advantage already achieved, namely that when pivoting the cantilever arm relative to the base part, regardless of the direction in which the lamp is always adjusted parallel to the base part, one significant simplification and cost reduction of the devices can be achieved, which exclude a rotation of the rods to each other.
  • the spherical thickenings each have at least one groove which is parallel to the longitudinal extension of the rods in the direction of their longitudinal extension, the grooves in both spherical thickened portions of each rod are arranged in the same direction to one another, guide pins on the spherical cap-like holders are arranged, each engage in a groove along this adjustable and that the spherical thickenings can be rotated about the longitudinal axes of the guide pins engaging in the grooves.
  • the guide pin mounting unit with a bore adapted to the clamping screw, and to attach it to the clamping screw, so that the clamping screw also the guide pin assembly unit is held in the correct position.
  • the guide pin mounting unit which has a hole in the center, on a pin, in particular in the center between the rods on a wall part or a pressure plate, in particular non-rotatably.
  • the guide pins are arranged in a radially directed manner with respect to the bore, so that relatively short guide pins which are resistant to high bending and with relatively little expenditure of material can be achieved.
  • a possibly preferred variant is characterized by radially inwardly directed guide pins formed on the spherical cap-like holders.
  • This electric desk lamp essentially comprises a base part 1 designed as a foot, a cantilever arm 2 articulated thereon and an electric lamp 3 articulated at its upper end.
  • a clamp can also be provided on the base part 1 in order to be able to clamp the desk lamp, for example, on the desk.
  • the base part can also be designed as a fastening plate.
  • the cantilever arm 2 is assembled from three mutually identical and mutually parallel rods 4.
  • the rods 4 have the same distances from each other.
  • a spherical thickening 5 is provided on both end parts of each rod 4.
  • the spherical thickenings 5 each have a diametrically directed bore through which a rod 4 is at least secured with static friction.
  • the thickenings 5 can also be integrally formed on the rods 4. By means of the thickenings 5, the rods 4 are articulated in a spherically limited manner on the base part 1 or on the lamp 3.
  • a bore 8 is provided in the facing wall parts 6 and 7 of the base part 1 and the lamp 3, which are at least partially box-shaped, for each spherical thickening 5, the diameter of which is slightly smaller than the largest diameter of a spherical Thickening is 5.
  • the spherical thickenings 5 are pivotally supported and rotatable about the longitudinal axis of the rods 4.
  • pressure plates 9 running parallel to the latter are provided (FIGS. 1 to 4). Or the wall parts 6 and 7 are assigned pressure plates 9 which run parallel to the latter (FIGS. 5 to 7).
  • These have the bores 8 in the shape, dimension and position of the same bores 10 and the spherical thickenings 5 are arranged on the edge parts of the bores 8 and 10 to be supported between the wall parts 6 and 7 and a pressure plate 9.
  • the bores 8 and 10 can have conical depressions, not shown, which, however, move outwards with the bores 8 and with the bores 10 expand inside.
  • tensioning devices which are not shown and which act on the pressure plate 9 are also provided, with the help of which the spherical thickenings 5 can be clamped between the edge parts of the bores 8 and 10 such that on the one hand a manual adjustment of the rods 4 relative to the base part 1 and the lamp 3 is possible, but on the other hand also the cantilever arm 2 and the lamp 3 are held frictionally in the respectively selected position without additional funds being required.
  • the tensioning devices are preferably tensioning screws, in particular to be operated from the outside, penetrating through the wall parts 6 or 7 and engaging on the pressure plates 9.
  • a two-axis joint 11 is provided at the end of each rod, a first axis 12 of which extends through the rod 4 diametrically.
  • the flanges of a U-shaped link 13 are articulated on the axle 12 and one end part of a second axle 14 is rotatably mounted in the web of the link 13.
  • the free end parts of the axes directed at right angles to the axes 12 and radially to the rods 4 are rotatably mounted on both ends of the cantilever arm 2 in a common connecting member 15.
  • All axes are also fixed so that they cannot be adjusted in the axial direction.
  • the joints 11 as well as the thickenings 5 are also identical to one another.
  • the electrical lead to the lamp 3 can for example be passed through the rods 4 if the latter are designed as tubes.
  • three-axis joints can also be provided to implement the invention, but three-axis joints are, among other things, considerably more complicated and expensive than ball joints.
  • a groove 16 is arranged in each of the spherical thickenings 5, which runs parallel to the longitudinal extension of the rod 4 in the direction of its longitudinal extension.
  • each rod 4 is arranged in the same direction as one another.
  • a cylindrically profiled guide pin 17 held on the base part 1 or on the lamp 3 engages with little movement play.
  • the three guide pins 17 held on the base part 1 or on the lamp 3 are each combined to form an assembly unit, in particular in such a way that the guide pins 17 are radially braced from a common hub part 18 and are each formed in one piece in the direction of the center of a spherical thickening 5.
  • the grooves 16 have the same depths over their entire length and, as can be seen from FIG. 7, each follow the curved surface of the spherical thickenings 5.
  • grooves 16 with a straight groove base, the latter extending parallel to the longitudinal extension of the rod 4.
  • the greatest depth of a groove 16 is greater than the insertion depth of a guide pin 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
EP85113677A 1984-11-29 1985-10-28 Lampe de bureau Expired - Lifetime EP0183065B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85113677T ATE49801T1 (de) 1984-11-29 1985-10-28 Elektrische schreibtischleuchte oder dergleichen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3443505 1984-11-29
DE19843443505 DE3443505A1 (de) 1984-11-29 1984-11-29 Elektrische schreibtischleuchte oder dergleichen
DE19853512145 DE3512145A1 (de) 1985-04-03 1985-04-03 Elektrische schreibtischleuchte oder dergleichen
DE3512145 1985-04-03

Publications (3)

Publication Number Publication Date
EP0183065A2 true EP0183065A2 (fr) 1986-06-04
EP0183065A3 EP0183065A3 (en) 1988-05-04
EP0183065B1 EP0183065B1 (fr) 1990-01-24

Family

ID=25826913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113677A Expired - Lifetime EP0183065B1 (fr) 1984-11-29 1985-10-28 Lampe de bureau

Country Status (3)

Country Link
EP (1) EP0183065B1 (fr)
CA (1) CA1262451A (fr)
DE (1) DE3575598D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2979413A1 (fr) * 2011-08-29 2013-03-01 Chantal Jacqueline Ghislaine Dirand Une lampe de table composee d'un pied deformable
JP2013137044A (ja) * 2011-12-28 2013-07-11 Sugatsune Kogyo Co Ltd 複合リンク機構

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR394278A (fr) * 1907-09-17 1909-01-19 Clifford Robert Stephen John H Mécanisme à mouvement à ressort universel parallèle
FR1091160A (fr) * 1954-01-05 1955-04-07 Appareil d'éclairage, notamment pour salles d'opérations
US3034809A (en) * 1960-08-08 1962-05-15 Greenberg Harold Jay Universal ball and socket joint
EP0114327B1 (fr) * 1983-01-19 1987-03-18 Carl Schenck Ag Rotule sans jeu, en particulier pour dispositifs d'essai et ensemble rotule comportant de telles rotules
US4595970A (en) * 1984-06-08 1986-06-17 Hauserman, Inc. Lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2979413A1 (fr) * 2011-08-29 2013-03-01 Chantal Jacqueline Ghislaine Dirand Une lampe de table composee d'un pied deformable
JP2013137044A (ja) * 2011-12-28 2013-07-11 Sugatsune Kogyo Co Ltd 複合リンク機構

Also Published As

Publication number Publication date
EP0183065B1 (fr) 1990-01-24
EP0183065A3 (en) 1988-05-04
CA1262451A (fr) 1989-10-24
DE3575598D1 (de) 1990-03-01

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