EP2607782B1 - Jointed lamp - Google Patents
Jointed lamp Download PDFInfo
- Publication number
- EP2607782B1 EP2607782B1 EP20120199303 EP12199303A EP2607782B1 EP 2607782 B1 EP2607782 B1 EP 2607782B1 EP 20120199303 EP20120199303 EP 20120199303 EP 12199303 A EP12199303 A EP 12199303A EP 2607782 B1 EP2607782 B1 EP 2607782B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- chamber
- lamp according
- circuit
- 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.)
- Not-in-force
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Classifications
-
- 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
-
- 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
- F21V21/15—Adjustable mountings specially adapted for power operation, e.g. by remote control
-
- 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
Definitions
- the present invention relates to a jointed lamp.
- a jointed lamp comprises an articulated structure formed by two or more elements rotatably connected by joints.
- One of the elements usually laid at an end of the articulated structure, carries one or more light sources; at the opposite end, another element acts as a base for the lamp (e.g. in the case of floor or table lamps), or is provided with fixing members for fixing the lamp to a wall or a ceiling.
- the joints allow the various elements to be moved with respect to each other and thereby orientate the lamp; of course, for the articulated structure to keep the desired shape, the joints must oppose a preset resistance to the movement of the elements, in particular for preventing the elements of the articulated structure from moving by simple effect of the weight thereof; to this end, the joints are associated with contrast members, e.g. springs or tie rods, and/or are provided with mechanical frictions or other mechanisms.
- the user adjusts an adjustment mechanism, typically by means of a screw.
- the present invention therefore relates to a jointed lamp as essentially defined in the appended claim 1 and, for the preferred aspects thereof, in the dependent claims.
- the lamp joints are provided with a friction device using a magneto-rheological fluid and operable by means of a magnetic actuator (permanent magnet or electromagnet): the device allows the joint to be locked once the joint arms are in the desired position.
- a magnetic actuator permanent magnet or electromagnet
- the normal articulation function is associated with a friction and/or mechanical lock function, obtained in a particularly simple and reliable manner.
- the management of the rheological characteristics of the fluid through magnetic field allows the adjustment of the friction effect of the joint to the full lock, if needed.
- any overstress may be overcome through a suitable by-pass channel.
- reference numeral 1 denotes a jointed lamp as a whole, for example a table lamp (it is however understood that the lamp of the invention may be a lamp of a different type, e.g. floor, ceiling, wall lamp, etc.).
- Lamp 1 comprises an articulated structure 2, which extends between two opposite ends 3, 4 and is formed by at least two elements 5 connected by a joint 7, and a lighting head 8, provided with at least one light source 9.
- Structure 2 may of course comprise a plurality of elements 5, pairs of consecutive elements 5 being connected by respective joints 7.
- structure 2 comprises three articulated elements 5, sequentially arranged and connected by two joints 7; starting from end 3, structure 2 comprises: an element 5a provided with a supporting base 11 (and/or fixing members for fixing lamp 1 to a wall or a ceiling), an intermediate element 5b, and an element 5c arranged at end 4 and which carries the lighting head 8; element 5b is arranged between elements 5a, 5c and is connected to them through joints 7.
- joint 7 will be described in detail hereinafter among elements 5a, 5b; it is understood that the other joint may also be of the same type.
- joint 7 comprises two arms 12, connected to respective elements 5, and a friction device 13 acting on arms 12.
- Device 13 comprises a casing 14 containing a closed circuit 15, filled with a magneto-rheological fluid, members 16 movable with respect to each other, cooperating with the fluid in circuit 15 and connected to respective arms 12, and a magnetic actuator 18, acting on the fluid.
- circuit 15 is shaped as a closed loop and comprises a transmission chamber 19, having two openings 21, and a conduit 22 that connects the two openings 21 outside chamber 19 and has an intermediate narrowing 23.
- Chamber 19 and conduit 22 are housed into casing 14.
- conduit 22 is substantially U-shaped and comprises two branches 24, connected to respective openings 21 of chamber 19, and an intermediate section 25, which connects the two branches 24 and has narrowing 23.
- the magnetic actuator 18, which for example comprises a permanent magnet or an electromagnet, is arranged close to the narrowing 23 for generating a magnetic field in the narrowing 23.
- the magnetic actuator 18 is controlled by a control 26 operable by a user and which selectively activates and deactivates, and optionally adjusts, the magnetic actuator 18; for example, control 26 is of the on/off type and activates and deactivates the magnetic actuator 18.
- control 26 is, for example, configured to move the magnet (or a screen, interposed between the magnet and the narrowing) with respect to the narrowing between an active position, in which the magnet generates a magnetic field having an intensity greater than a preset threshold on the fluid in the narrowing, and an inactive position, in which the magnetic field generated by the magnet on the fluid in the narrowing has an intensity smaller than the threshold.
- control 26 is, for example, configured to selectively activate the electromagnet for generating the magnetic field having an intensity greater than the preset threshold on the fluid in the narrowing.
- the fluid is a magneto-rheological fluid, i.e. a fluid having rheological characteristics changing as a function of the magnetic field applied onto the fluid; in the presence of a magnetic field, the fluid becomes more viscous/dense, up to possibly behave substantially as a solid, and generates a greater friction to sliding.
- a magneto-rheological fluid i.e. a fluid having rheological characteristics changing as a function of the magnetic field applied onto the fluid; in the presence of a magnetic field, the fluid becomes more viscous/dense, up to possibly behave substantially as a solid, and generates a greater friction to sliding.
- magneto-rheological fluid As well known, by magneto-rheological fluid it is understood a fluid (generally but not necessarily used along with a carrier fluid) which, when subjected to a magnetic field, drastically increases its apparent viscosity, up to the point of becoming or anyway behaving as a solid (in particular, a viscoelastic solid).
- the resistance (yield strength) of the fluid in activated status i.e. subjected to magnetic field
- circuit 15 also comprises a by-pass channel 27 which connects the two branches 24 and is arranged in parallel to the intermediate section 25 with narrowing 23.
- the by-pass channel 27 is provided with a controlled valve 28, for example a valve of the type having a shutter charged by a spring: valve 28 is normally closed and closes the by-pass channel 27, but if pressure of the fluid in circuit 15 exceeds a preset threshold (equal to the strength exerted by the spring), the valve opens.
- Chamber 19 is substantially cylindrical and extends along and about a central axis A; chamber 19 is delimited by a lateral wall 29 arranged about axis A and houses a rotating wheel 30; wheel 30 is eccentrically arranged into chamber 19 and rotates about a rotation axis R which is eccentric with respect to the central axis A of chamber 19; wheel 30 is provided with radially outer vanes 31 which extend from a lateral surface of wheel 30 substantially up to the lateral wall 29 of chamber 19; vanes 31 are angularly spaced apart from each other and have a different radial length; vanes 31 end with respective free ends which are substantially in contact with the lateral wall 29 of chamber 19 (or are close to the lateral wall 29 of chamber 19, being in close proximity therewith).
- Openings 21 are, for example, formed on the lateral wall 29 and are spaced apart from each other and connected to branches 24, respectively.
- Casing 14 is integrally carried by an arm 12a connected to element 5a of structure 2; wheel 30 is rotatable into chamber 19 and with respect to casing 14 and is integrally connected to an arm 12b, connected to element 5b of structure 2, e.g. by means of one or more connecting elements 32; wheel 30 and casing 14 defines the members 16 movable with respect to each other and connected to respective arms 12.
- the fluid In use, in the absence of magnetic field on the fluid, the fluid is free to circulate into circuit 15 and arms 12 can be rotated with respect to each other, thereby adjusting the position of arms 12 and of elements 5 connected to them; once the position of arms 12 (i.e. of elements 5) has been adjusted, the user can actuate, by means of control 26, the magnetic actuator 18 which generates such a magnetic field as to block the fluid into narrowing 23; the circulation of fluid into circuit 15 is therefore hindered or fully prevented by variation in the rheological characteristics of the fluid in narrowing 23; joint 7 is locked and arms 12 cannot be moved with respect to each other (unless the movement of arms 12 is forced).
- the by-pass channel 27 ensures the release of joint 7 in case of forcing on joint 7 which excessively increases pressure inside chamber 19: in fact, valve 28 opens if the fluid pressure into circuit 15 exceeds the preset threshold.
- the magnetic actuator 18 is associated with an adjustment system controlled by control 26: user can therefore adjust the intensity of the magnetic field generated by the magnetic actuator 18 and accordingly progressively change the rheological characteristics of the fluid, increasing the fluid resistance into narrowing 23 possibly up to the full lock of joint 7.
- chamber 19 houses an axially sliding piston 35.
- Chamber 19 is again substantially cylindrical and extends along and about a central axis A and is delimited by a lateral wall 29 arranged about axis A; chamber 19 again has two openings 21, arranged at respective axially opposite ends of chamber 19 and connected to branches 24, respectively.
- Piston 35 is housed into chamber 19 and slides along axis A. Piston 35 has a head 36, substantially in radial contact with the lateral wall 29 of chamber 19, and a rod 37 connected to head 36.
- Head 36 divides chamber 19 into two compartments 38, each having an opening 21 connected to conduit 22.
- Rod 37 is arranged into a compartment 38 and projects from a bottom wall of chamber 19.
- Casing 14 which contains chamber 19 and circuit 15 is integrally carried by arm 12a; piston 35 is connected to arm 12b via a rotating mechanism 40, so that the translation movement of piston 35 along axis A determines a rotation of arm 12b with respect to the other arm 12a (and vice versa).
- rod 37 of piston 35 is integrally connected to a rack 41 (movable along axis A along with piston 35) which engages a gear wheel 42, which is hinged to casing 14 and is connected, for example by means of one or more connecting elements 32, to arm 12b; arm 12b is rotatable integrally with the gear wheel 42, while piston 35 slides along axis A; therefore, members 16 movable with respect to each other and connected to respective arms 12 now consist of casing 14 and gear wheel 42.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Pivots And Pivotal Connections (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
- The present invention relates to a jointed lamp.
- In general, a jointed lamp comprises an articulated structure formed by two or more elements rotatably connected by joints. One of the elements, usually laid at an end of the articulated structure, carries one or more light sources; at the opposite end, another element acts as a base for the lamp (e.g. in the case of floor or table lamps), or is provided with fixing members for fixing the lamp to a wall or a ceiling.
- The joints allow the various elements to be moved with respect to each other and thereby orientate the lamp; of course, for the articulated structure to keep the desired shape, the joints must oppose a preset resistance to the movement of the elements, in particular for preventing the elements of the articulated structure from moving by simple effect of the weight thereof; to this end, the joints are associated with contrast members, e.g. springs or tie rods, and/or are provided with mechanical frictions or other mechanisms. In order to adjust the joint resistance, the user adjusts an adjustment mechanism, typically by means of a screw.
- In general, the joints of known jointed lamps are not fully satisfactory: in fact, known mechanisms may be little efficient or reliable and require repeated and frequent adjustments; they may also be subject to damage and often, they are not able to ensure an accurate adjustment and/or do not allow the full lock of the joint to be achieved.
US2005201116-A1 discloses an adaptive head light assembly in which an optical element is actuated by an actuator comprising a shape memory material; it is also suggested to replace the shape memory material with other materials, such as magnetorheological fluids. - It is an object of the present invention to provide a jointed lamp which allows the above-mentioned problems of the prior art to be fully or partly overcome; in particular, it is an object of the invention to provide a jointed lamp which has a particularly simple, effective and reliable joint adjustment system.
- The present invention therefore relates to a jointed lamp as essentially defined in the appended
claim 1 and, for the preferred aspects thereof, in the dependent claims. - According to the invention, the lamp joints are provided with a friction device using a magneto-rheological fluid and operable by means of a magnetic actuator (permanent magnet or electromagnet): the device allows the joint to be locked once the joint arms are in the desired position.
- In this way, the normal articulation function is associated with a friction and/or mechanical lock function, obtained in a particularly simple and reliable manner.
- The management of the rheological characteristics of the fluid through magnetic field allows the adjustment of the friction effect of the joint to the full lock, if needed.
- Instead, any overstress may be overcome through a suitable by-pass channel.
- Moreover, the replacement of known systems (of mechanical type and with mechanical regulator type) with the present invention, which is not provided with parts subject to wear, results in a higher resistance of the joint as a whole to the extended use, eliminating the need of periodical adjustment.
- Further features and advantages of the present invention will be clear from the description of the following non-limiting embodiments, made with reference to the accompanying figures, in which:
-
figure 1 is a schematic side view of a jointed lamp according to the invention; -
figure 2 is a schematic view, with sectional parts and removed parts for clarity, of a detail of the lamp offigure 1 , in particular of a joint thereof; -
figure 3 is a schematic view of a variation of the joint offigure 2 . - In
figure 1 ,reference numeral 1 denotes a jointed lamp as a whole, for example a table lamp (it is however understood that the lamp of the invention may be a lamp of a different type, e.g. floor, ceiling, wall lamp, etc.). -
Lamp 1 comprises anarticulated structure 2, which extends between twoopposite ends joint 7, and a lighting head 8, provided with at least onelight source 9. -
Structure 2 may of course comprise a plurality of elements 5, pairs of consecutive elements 5 being connected byrespective joints 7. - In the example of
figure 1 ,structure 2 comprises three articulated elements 5, sequentially arranged and connected by twojoints 7; starting fromend 3,structure 2 comprises: anelement 5a provided with a supporting base 11 (and/or fixing members forfixing lamp 1 to a wall or a ceiling), anintermediate element 5b, and anelement 5c arranged atend 4 and which carries the lighting head 8;element 5b is arranged betweenelements joints 7. - For simplicity, only
joint 7 will be described in detail hereinafter amongelements - With reference to
figure 2 ,joint 7 comprises two arms 12, connected to respective elements 5, and afriction device 13 acting on arms 12. -
Device 13 comprises acasing 14 containing a closedcircuit 15, filled with a magneto-rheological fluid,members 16 movable with respect to each other, cooperating with the fluid incircuit 15 and connected to respective arms 12, and amagnetic actuator 18, acting on the fluid. - In particular,
circuit 15 is shaped as a closed loop and comprises atransmission chamber 19, having twoopenings 21, and aconduit 22 that connects the twoopenings 21outside chamber 19 and has an intermediate narrowing 23.Chamber 19 andconduit 22 are housed intocasing 14. - In the non-limiting example shown in
figure 2 ,conduit 22 is substantially U-shaped and comprises twobranches 24, connected torespective openings 21 ofchamber 19, and anintermediate section 25, which connects the twobranches 24 and has narrowing 23. - The
magnetic actuator 18, which for example comprises a permanent magnet or an electromagnet, is arranged close to the narrowing 23 for generating a magnetic field in thenarrowing 23. - The
magnetic actuator 18 is controlled by acontrol 26 operable by a user and which selectively activates and deactivates, and optionally adjusts, themagnetic actuator 18; for example,control 26 is of the on/off type and activates and deactivates themagnetic actuator 18. - If the
magnetic actuator 18 comprises a permanent magnet,control 26 is, for example, configured to move the magnet (or a screen, interposed between the magnet and the narrowing) with respect to the narrowing between an active position, in which the magnet generates a magnetic field having an intensity greater than a preset threshold on the fluid in the narrowing, and an inactive position, in which the magnetic field generated by the magnet on the fluid in the narrowing has an intensity smaller than the threshold. - If
magnetic actuator 18 comprises an electromagnet,control 26 is, for example, configured to selectively activate the electromagnet for generating the magnetic field having an intensity greater than the preset threshold on the fluid in the narrowing. - The fluid is a magneto-rheological fluid, i.e. a fluid having rheological characteristics changing as a function of the magnetic field applied onto the fluid; in the presence of a magnetic field, the fluid becomes more viscous/dense, up to possibly behave substantially as a solid, and generates a greater friction to sliding.
- As well known, by magneto-rheological fluid it is understood a fluid (generally but not necessarily used along with a carrier fluid) which, when subjected to a magnetic field, drastically increases its apparent viscosity, up to the point of becoming or anyway behaving as a solid (in particular, a viscoelastic solid). The resistance (yield strength) of the fluid in activated status (i.e. subjected to magnetic field) may be accurately controlled by changing the intensity of the magnetic field applied.
- In particular, when the magnetic field applied by the
magnetic actuator 18 to the fluid in narrowing 23 exceeds the preset threshold, the fluid remains virtually blocked into narrowing 23 and prevents the circulation of the remaining fluid intocircuit 15. - Preferably, as shown in
figure 2 ,circuit 15 also comprises a by-pass channel 27 which connects the twobranches 24 and is arranged in parallel to theintermediate section 25 with narrowing 23. The by-pass channel 27 is provided with a controlledvalve 28, for example a valve of the type having a shutter charged by a spring:valve 28 is normally closed and closes the by-pass channel 27, but if pressure of the fluid incircuit 15 exceeds a preset threshold (equal to the strength exerted by the spring), the valve opens. -
Chamber 19 is substantially cylindrical and extends along and about a central axis A;chamber 19 is delimited by alateral wall 29 arranged about axis A and houses arotating wheel 30;wheel 30 is eccentrically arranged intochamber 19 and rotates about a rotation axis R which is eccentric with respect to the central axis A ofchamber 19;wheel 30 is provided with radiallyouter vanes 31 which extend from a lateral surface ofwheel 30 substantially up to thelateral wall 29 ofchamber 19;vanes 31 are angularly spaced apart from each other and have a different radial length; vanes 31 end with respective free ends which are substantially in contact with thelateral wall 29 of chamber 19 (or are close to thelateral wall 29 ofchamber 19, being in close proximity therewith). -
Openings 21 are, for example, formed on thelateral wall 29 and are spaced apart from each other and connected tobranches 24, respectively. -
Casing 14 is integrally carried by anarm 12a connected toelement 5a ofstructure 2;wheel 30 is rotatable intochamber 19 and with respect tocasing 14 and is integrally connected to anarm 12b, connected toelement 5b ofstructure 2, e.g. by means of one or more connectingelements 32;wheel 30 andcasing 14 defines themembers 16 movable with respect to each other and connected to respective arms 12. - In use, in the absence of magnetic field on the fluid, the fluid is free to circulate into
circuit 15 and arms 12 can be rotated with respect to each other, thereby adjusting the position of arms 12 and of elements 5 connected to them; once the position of arms 12 (i.e. of elements 5) has been adjusted, the user can actuate, by means ofcontrol 26, themagnetic actuator 18 which generates such a magnetic field as to block the fluid into narrowing 23; the circulation of fluid intocircuit 15 is therefore hindered or fully prevented by variation in the rheological characteristics of the fluid in narrowing 23;joint 7 is locked and arms 12 cannot be moved with respect to each other (unless the movement of arms 12 is forced). - The by-
pass channel 27 ensures the release ofjoint 7 in case of forcing onjoint 7 which excessively increases pressure inside chamber 19: in fact,valve 28 opens if the fluid pressure intocircuit 15 exceeds the preset threshold. - According to a possible variation, the
magnetic actuator 18 is associated with an adjustment system controlled by control 26: user can therefore adjust the intensity of the magnetic field generated by themagnetic actuator 18 and accordingly progressively change the rheological characteristics of the fluid, increasing the fluid resistance into narrowing 23 possibly up to the full lock ofjoint 7. - In the embodiment of
figure 3 , in which details that are similar or equal to those already described are denoted with the same reference numerals, instead of a rotatable wheel,chamber 19 houses an axially slidingpiston 35. -
Chamber 19 is again substantially cylindrical and extends along and about a central axis A and is delimited by alateral wall 29 arranged about axis A;chamber 19 again has twoopenings 21, arranged at respective axially opposite ends ofchamber 19 and connected tobranches 24, respectively. - Piston 35 is housed into
chamber 19 and slides along axis A. Piston 35 has ahead 36, substantially in radial contact with thelateral wall 29 ofchamber 19, and arod 37 connected tohead 36. -
Head 36 divideschamber 19 into twocompartments 38, each having anopening 21 connected toconduit 22.Rod 37 is arranged into acompartment 38 and projects from a bottom wall ofchamber 19. -
Casing 14 which containschamber 19 andcircuit 15 is integrally carried byarm 12a;piston 35 is connected toarm 12b via arotating mechanism 40, so that the translation movement ofpiston 35 along axis A determines a rotation ofarm 12b with respect to theother arm 12a (and vice versa). For example,rod 37 ofpiston 35 is integrally connected to a rack 41 (movable along axis A along with piston 35) which engages agear wheel 42, which is hinged tocasing 14 and is connected, for example by means of one or more connectingelements 32, toarm 12b;arm 12b is rotatable integrally with thegear wheel 42, whilepiston 35 slides along axis A; therefore,members 16 movable with respect to each other and connected to respective arms 12 now consist ofcasing 14 andgear wheel 42. - Also in this case, if the
magnetic actuator 18 is deactivated, the position of arms 12 of joint 7 (and thereby of elements 5 of structure 2) may be adjusted, since the fluid is freely circulating intocircuit 15 from onecompartment 38 to the other ofchamber 19; by actuating themagnetic actuator 18, the fluid circulation is blocked and the position of arms 12 is thus maintained. - Finally, it is understood that further changes and variations may be made to the jointed lamp described and illustrated here without departing from the scope of the appended claims.
Claims (10)
- A jointed lamp (1) comprising an articulated structure (2), formed by at least two elements (5a;5b;5c) connected by a joint (7), and a lighting head (8), provided with at least one light source (9); the joint (7) comprising two arms (12a,12b), joined to respective elements (5a;5b;5c), and a friction device (13) acting on the arms (12a,12b); the lamp (1) being characterized in that the friction device (13)comprises a closed circuit (15), filled with a magneto-rheological fluid, members (16) movable with respect to each other and cooperating with the fluid in the circuit (15) and connected to the respective arms (12a;12b); and a magnetic actuator (18), acting on the fluid for changing the rheological characteristics of the fluid as a function of the magnetic field applied onto the fluid; the magnetic actuator (18) being arranged close to a narrowing (23) comprised in the circuit (15) and being controlled by a control (26) that selectively activates and deactivates the magnetic actuator (18) for generating a magnetic field having an intensity greater than a preset threshold on the fluid in the narrowing (23).
- A lamp according to claim 1, wherein the circuit (15) comprises a transmission chamber (19), having two openings (21), and a conduit (22) that connects the two openings (21) outside the chamber (19) and is provided with the narrowing (23).
- A lamp according to claim 2, wherein the chamber (19) is carried integrally by a first arm (12a) and houses a movable member (16) immersed in the fluid and connected to a second arm (12b).
- A lamp according to claim 3, wherein the chamber (19) houses a rotating wheel (30) provided with radially outer vanes (31).
- A lamp according to claim 4, wherein the wheel (30) is positioned and rotates eccentrically in the chamber (19) and the vanes (31) project from a lateral surface of the wheel (30) substantially up to a lateral wall (29) of the chamber (19).
- A lamp according to claim 3, wherein the chamber (19) houses an axially sliding piston (35).
- A lamp according to claim 6, wherein the piston (35) has a head (36) that separates the chamber (19) in two compartments (38), each compartment (38) having an opening (21) connected to the conduit (22), and a rod (37) that projects from the head (36) and is joined to an arm (12a;12b) via a rotating mechanism (40).
- A lamp according to one of the preceding claims, wherein the circuit (15) comprises also a by-pass channel (27), set in parallel to the narrowing (23) and provided with a controlled valve (28).
- A lamp according to claim 8, wherein the valve (28) is normally closed and closes the by-pass channel (27), and opens if the pressure of the fluid in the circuit (15) exceeds a preset threshold.
- A lamp according to one of the preceding claims, wherein the magnetic actuator (18) is provided with an adjustment system for adjusting the intensity of the magnetic field generated by the magnetic actuator (18) and hence progressively changing the rheological characteristics of the fluid.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT002338A ITMI20112338A1 (en) | 2011-12-21 | 2011-12-21 | SWIVEL LAMP |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2607782A1 EP2607782A1 (en) | 2013-06-26 |
EP2607782B1 true EP2607782B1 (en) | 2015-02-11 |
Family
ID=45540967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120199303 Not-in-force EP2607782B1 (en) | 2011-12-21 | 2012-12-21 | Jointed lamp |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2607782B1 (en) |
IT (1) | ITMI20112338A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110886980A (en) * | 2019-12-03 | 2020-03-17 | 李佳佳 | Student is with intelligent eyeshield desk lamp |
CN112130412B (en) * | 2020-09-27 | 2021-10-08 | 深圳申鲲科技有限公司 | Automatic leveling projector display equipment based on magnetorheological fluid principle |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20030769A1 (en) * | 2003-10-02 | 2005-04-03 | Fiat Ricerche | LIGHTING DEVICE, FOR EXAMPLE TABLE LAMP, |
US7275846B2 (en) * | 2004-03-12 | 2007-10-02 | General Motors Corporation | Adaptive head light and lens assemblies |
DE202004008024U1 (en) * | 2004-05-19 | 2005-10-06 | Bauerfeind Ag | Adjustable motion damper |
KR100980856B1 (en) * | 2008-05-26 | 2010-09-10 | 한국과학기술원 | Robot joint using rheological fluid |
-
2011
- 2011-12-21 IT IT002338A patent/ITMI20112338A1/en unknown
-
2012
- 2012-12-21 EP EP20120199303 patent/EP2607782B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP2607782A1 (en) | 2013-06-26 |
ITMI20112338A1 (en) | 2013-06-22 |
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