EP3120822A1 - Gelenkarm für operationsfeldbeleuchtung - Google Patents

Gelenkarm für operationsfeldbeleuchtung Download PDF

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Publication number
EP3120822A1
EP3120822A1 EP16179106.6A EP16179106A EP3120822A1 EP 3120822 A1 EP3120822 A1 EP 3120822A1 EP 16179106 A EP16179106 A EP 16179106A EP 3120822 A1 EP3120822 A1 EP 3120822A1
Authority
EP
European Patent Office
Prior art keywords
illuminance
light
auxiliary light
value
arm
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
EP16179106.6A
Other languages
English (en)
French (fr)
Other versions
EP3120822B1 (de
Inventor
Angelo Favonio
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.)
F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA
Faro SpA
Original Assignee
F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA
Faro SpA
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
Application filed by F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA, Faro SpA filed Critical F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA
Publication of EP3120822A1 publication Critical patent/EP3120822A1/de
Application granted granted Critical
Publication of EP3120822B1 publication Critical patent/EP3120822B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/14—Dental work stands; Accessories therefor
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use
    • F21W2131/202—Lighting for medical use for dentistry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/20—Combination of light sources of different form

Definitions

  • the present invention refers to an articulated arm for surgical fields, in particular for dental units.
  • Examples of this kind of technical field are jewellery making, where the jeweller works with his/her tools in a strongly illuminated surgical field to allow perfect illumination of the jewel being made.
  • a further example is represented by dentistry, in which the surgical field coincides, basically, with the mouth of the patient.
  • operating lights are now in use that are capable of emitting illuminance even up to 100000 - 120000 lux, so that the mouth of the patient is strongly illuminated.
  • the optimal illuminance range in dentistry is comprised between about 8000 lux and about 50000 lux.
  • illuminance comprised between about 30000 lux and about 50000 lux makes it possible to illuminate the darkest areas present in the mouth of the patient, whereas an illuminance of about 8000 lux is indicatively the minimum level to correctly recognise a white tooth.
  • the illuminance levels described above therefore allow the surgeon to work in the best visual conditions, minimising the visual tiring and promoting concentration.
  • the pre-operation field comprises an outer area closer to the surgical field (that indicatively extends for about 50 centimetres around the surgical field and includes the patient) which should be illuminated with illuminance of about 1000 lux, and an even more outer area (i.e. outside of the patient) that should be illuminated with illuminance of about 500 lux, typical of normal work environments.
  • the Applicant has perceived that by providing an auxiliary light having much lower illuminance that that of the operating light but greater than the illuminance normally present outside of the surgical field, it is possible to illuminate the space immediately outside of the surgical field with greater illuminance than ambient lighting normally present.
  • the Applicant has also perceived that by coupling such an auxiliary light with one of the two arms of an articulated arm for surgical fields, like for example an articulated arm for dental units, it is possible to selectively illuminate, but with greater illuminance than ambient light, some areas of the pre-operation field, like for example a quiver, a tool tray and similar, by simply orienting an arm of the articulated arm.
  • the present invention therefore concerns an articulated arm for surgical fields, comprising a first arm able to be constrained to a wall, a ceiling or a device and mechanically articulated to a second arm, an operating light connected to the second arm to illuminate a surgical field in which said operating light has adjustable illuminance between a minimum value and a maximum value, at least one auxiliary light fixedly connected to at least one from said first arm and said second arm, said auxiliary light having adjustable illuminance between a minimum value and a maximum value, control members being configured to adjust the illuminance of the auxiliary light as a function of the illuminance of the operating light, wherein said control members are active on said auxiliary light so that said minimum value of the auxiliary light is reached when the operating light takes on a limit illuminance value greater than said minimum value thereof.
  • the variation of illuminance of the auxiliary light as a function of the current illuminance of the operating light makes it possible to optimise the focusing of the operator when his/her gaze and attention pass from the surgical field to the immediately surrounding area, or vice-versa, since as the illuminance of the surgical field decreases (or increases), the illuminance of the pre-operation field increases and/or decreases.
  • the illuminance of the auxiliary light reaches its minimum value, preferably corresponding to the average ambient illuminance value, when the illuminance of the operating light reaches a limit value greater than the minimum value of the illuminance of the operating light, so that the area illuminated by the auxiliary light is illuminated with light intensity equal to ambient light intensity typical of the area of the pre-operation field illuminated when the illuminance of the operating light reaches the limit value.
  • the operating light is indeed adjustable between a maximum illuminance value corresponding to an ideal illuminance value for performing operations on the surgical field, to a minimum illuminance value, less than the limit value, at which it is not suitable to carry out operations in the surgical field.
  • the maximum illuminance value of the operating light can correspond to the ideal illuminance value for carrying out operations in the oral cavity of the patient
  • the minimum illuminance value can correspond to an illuminance value such as not to accelerate the polymerisation of a filling compound (an operations that the dentist performs outside of the surgical field and therefore when not operating on the oral cavity of the patient) but which still allows the patient to be illuminated.
  • the limit illuminance value of the operating light can for example correspond to an illuminance value useful for performing particular operations in the surgical field, like for example (in dentistry) recognising the chromatic variations of the colour of the patient's teeth.
  • the term “adjust” or “adjustment” referring to the illuminance of a light is meant to indicate the possibility of varying the light intensity emitted by the light with continuity.
  • luminance is meant to indicate the parts of luminous flux emitted by a light source (for example a light) that hits a surface.
  • luminous flux is meant to indicate the total amount of light in the visible spectrum emitted by the light source.
  • lux is meant to indicate the measurement of the illuminance on a surface of one square metre placed a certain distance from the light source.
  • lux values are to be considered to be measured on a surface placed 700 millimetres from the light.
  • lux values are to be considered to be measured on a surface placed 500 millimetres from the light.
  • control members are configured to keep said auxiliary light at said minimum illuminance value when the operating light takes on illuminance values lower than said limit illuminance value.
  • the illuminance of the auxiliary light does not go down, even when the illuminance of the operating light falls below the limit value, below its own minimum value so that the area illuminated by the auxiliary light is still illuminated with light intensity at least equal to the typical ambient light of the area of the illuminated pre-operation field.
  • the auxiliary light always makes a contribution to the illuminance of the pre-operation field even when the dentist is not directly operating on the surgical field (in other words when the illuminance of the operating light is below the limit value).
  • control members activate the controlled switching off of said operating light irrespective of the on or off state of said auxiliary light.
  • control members activate the controlled switching off of said auxiliary light irrespective of the on or off state of said operating light.
  • the auxiliary light can be deactivated whenever the dentist wishes.
  • the minimum illuminance value of the auxiliary light is comprised between 250 lux and 750 lux, preferably about 500 lux.
  • the maximum illuminance value of the auxiliary light is comprised between 750 lux and 2500 lux, preferably about 1350 lux.
  • Such a maximum value of the illuminance of the auxiliary light makes it possible not to dazzle the patient (who could be in a position beneath the auxiliary light) and, in any case, ensures good visual comfort for the dentist in passing between the surgical field and the pre-operation field and vice-versa.
  • the limit illuminance value of the operating light is comprised between 2000 lux and 10000 lux. Even more preferably, the limit illuminance value of the operating light is about 8000 lux.
  • the limit illuminance value of the operating light is such as to allow operations in the surgical field.
  • control members are configured so that a percentage illuminance variation of the operating light, in the range comprised between the maximum illuminance value and the limit illuminance value, corresponds to a percentage illuminance variation of the auxiliary light by an amount equal to a correlation coefficient greater than one multiplied by the percentage illuminance variation of the operating light.
  • the percentage variation is calculated as the ratio between the current illuminance and the maximum illuminance.
  • a percentage illuminance variation of the operating light does not correspond to the same percentage illuminance variation of the auxiliary light; the percentage variation of the illuminance of the auxiliary light being correlated to the percentage variation of the illuminance of the operating light by a correlation multiplication coefficient greater than 1.
  • such a correlation coefficient increases at a constant rate, when the illuminance of the operating light decreases, in the entire variation range comprised between the maximum value and the limit illuminance value of the operating light.
  • the correlation coefficient does not apply, in other words an illuminance variation of the operating light does not correspond to any variation of the illuminance of the auxiliary light.
  • said auxiliary light is integrated inside a seat of said first arm or of said second arm.
  • said auxiliary light is positioned at a lower portion of said first or second arm.
  • auxiliary light is of the LED or OLED type.
  • the term dental unit is meant to indicate a dental apparatus comprising a plurality of tools and equipment used in a dental practice, like for example a dental chair A, a dental quiver F, a dental light 6, a tool-holder, a dental fountain with attached cups and spittoon and the like ( figure 1 ).
  • the term surgical field is meant to indicate the area in which the dentist operates on the patient during a dental intervention, in other words the area that is located at the patient's mouth ( figure 1 ).
  • pre-operation field is meant to indicate the area located in the immediate vicinity of the surgical field, whether they are located on the patient or outside thereof, like for example the areas in which the dental quiver, the tool-holder and the like are present ( figure 1 ).
  • reference numeral 1 wholly indicates an articulated arm for surgical fields in accordance with the present invention applied to a dental unit 100.
  • the articulated arm 1 comprises a first arm 2 that extends between a first end 2a and a second end 2b.
  • the first end 2a of the first arm 2 is configured to be able to be constrained to a fixed portion 101, like for example a wall, a dental unit 100 (as shown in figure 1 ) or another device.
  • the first end 2a is constrained in an articulated manner to the fixed portion 101 ( figure 1 ).
  • the articulated arm 1 comprises a second arm 3 that extends between a first end 3a and a second end 3b.
  • the articulated arm 1 also comprises an operating light 4 at the second end 3b of the second arm 3 ( figure 1 ).
  • the operating light 4 comprises an optical diffusor 6 to direct a beam of light F1 towards the surgical field.
  • the operating light 4 has variable illuminance with continuity between a maximum value comprised between about 100000 and about 60000 lux and a minimum value of about 3000 lux.
  • the operating light 4 can be a halogen lamp, even if in the preferred embodiment of the invention it is an LED lamp.
  • the illuminance of the operating light 4 can be varied by the dentist by acting on a suitable actuator.
  • the second end 2a of the first arm 2 and the first end 3a of the second arm 3 are articulated to one another so that the second arm 3 is mobile with respect to the first arm 2 and can be oriented in space to position the operating light 4 where necessary for the work of the dentist.
  • the second end 2b of the first arm 2 and the first end 3a of the second arm 3 are articulated to one another through a hinge or a ball joint 5, so as to allow at least the relative rotation of the second arm 3 with respect to the first arm 2 ( figure 1 ).
  • the operating light 4 arranged at the second end 3b of the second arm 3 is preferably mobile with respect to such an end and is constrained to it through one or more hinges, through ball joints or similar.
  • the articulated arm 1 also comprises an auxiliary light 7 fixedly connected to the first arm 2 and capable of emitting a second light beam F2.
  • the auxiliary light 7 has lower illuminance than the illuminance of the operating light 6.
  • the illuminance of the auxiliary light 7 is variable between a maximum value comprised between about 2500 lux and a minimum value of about 250 lux.
  • the illuminance of the auxiliary light 7 is variable between a maximum value of about 1350 lux and a minimum value of about 500 lux.
  • the auxiliary light 7, in use, generates a beam of light oriented and diffused by a respective diffusor 8.
  • the first arm 2 has a lower portion 2c, and an upper portion 2d, respectively facing, when the articulated arm is in use, towards the floor and towards the ceiling of the dental studio.
  • the second arm 3 has a lower portion and an upper portion also respectively facing, when the articulated arm is in use, towards the floor and towards the ceiling of the dental studio.
  • the first arm 2 (and in some applications also the second arm 3) usually sits, when the articulated arm is in use, right above or in the immediate vicinity of the pre-operation field as defined above, in other words the area at which the dental quiver and/or the tool holder are located.
  • the auxiliary light 7 is positioned at the lower portion 2c of the first arm 2 so as to directly illuminate the pre-operation field.
  • the auxiliary light 7 is positioned at the upper portion 2d of the first arm 2, so that the pre-operation field (and also further areas of the dental studio) can be illuminated indirectly, with reflected light, by the auxiliary light 7.
  • the position of the auxiliary light 7 on the first arm 2 is that most suitable for illuminating the pre-operation field as a function of the position usually taken up by the articulated arm during the intervention.
  • the auxiliary light 7 is of the LED or OLED type.
  • the type of LED or OLED light source ensures a high level of optical control, as well as excellent lumen/watt efficiency.
  • the auxiliary light 7 comprises at least one screen or optical diffusor 8 configured to correct and/or rather distribute the beam of light F2 and illuminate, without however dazzling the patient P sitting on the chair 102 of the unit 100, the pre-operation field.
  • the choice of optical properties of the diffusor 8 is, for example, a function of the opening angle of the light beam that is wished to be obtained or the level of reduction of the illuminance produced by the auxiliary light 7 to not dazzle the users.
  • the auxiliary light 7 is integrated inside a seat 9 formed in the first arm 2 ( figures 2 and 3 ).
  • the auxiliary light 7 can be positioned inside the first 2 arm and sit completely inside the arm with the optical diffusor 8 flush with the outer surface of the arm itself.
  • the seat 9 is equipped with members suitable for dissipating the heat developed by the auxiliary light 7, especially if the latter does not incorporate LED technology.
  • the auxiliary light 7 is housed in a containment body 10 stably constrained to the first arm 2 ( figures 4 and 5 ).
  • the containment body 10 is equipped with members suitable for dissipating the heat developed by the auxiliary light 7.
  • the containment body 10 is preferably a metallic profile 11 on which the light 7 is installed.
  • a metallic profile 11 comprises a first portion 11a intended to contact the first arm 2 and to stably constrained to it (for example through screws or similar) and a second portion 11b that houses the auxiliary light 7 exposing it to the environment outside of the profile, so as to be able to illuminate the surrounding environment.
  • the second portion 11b of the metallic profile 11 is also provided with constraining members to be able to receive the optical diffusor 8 of the light 7 in engagement.
  • control of the illuminance of the auxiliary light 7 is carried out by control members 12 as a function of the illuminance taken on by the operating light 4 (controlled by the user).
  • the control members 12 are active on the auxiliary light 7 by varying the intensity of current provided to it as a function of the current intensity sent to the operating light 4. Suitable calibration curves make it possible to unequivocally relate the current intensity supplied to the auxiliary light 7 and to the operating light 4 with the respective illuminances. Therefore, hereinafter reference will be made without distinction to the current intensity provided to the lights or to the illuminance thereof.
  • control members 12 send a signal AS representative of an illuminance level of the auxiliary light 7 as a function of a signal OS received by the operating light 4 representative of the illuminance emitted by it.
  • the signal AS is generated by correlating the signal OS with a TA preset table, or algorithm, in the control members 12.
  • each illuminance value of the operating light 4 corresponds to an illuminance value of the auxiliary light 7.
  • each percentage illuminance value, with respect to the maximum illuminance value, of the operating light 4 corresponds to a percentage illuminance value, with respect to the maximum illuminance value, of the auxiliary light 7.
  • a range comprised between the maximum value and a limit illuminance value (greater than the minimum value) of the operating light 4 is associated with a correlation coefficient. Such a correlation coefficient is multiplied by the percentage illuminance value of the operating light 4 to give, as a result, the percentage illuminance value of the auxiliary light.
  • the correlation coefficient is a number greater than 1 and increases uniformly, in the range of applicability thereof, progressively as the illuminance values of the operating light 4 decrease.
  • the illuminance value of the auxiliary light 7 remains constant and equal to the limit illuminance value of the operating light 4.
  • the illuminance values of the operating light 4 are respectively: maximum value 80000 lux, minimum value 3000 lux, limit value 8000 lux.
  • the illuminance values of the auxiliary light 7 are respectively: maximum value 1350 lux, minimum value 500 lux.
  • the auxiliary light 7 and the operating light 4 are controlled with a single adjuster device 13 (schematised in figure 6 ) by the dentist, so that the control carried out by the dentist on the illuminance of the operating light 4 immediately and automatically determines a corresponding (in the sense specified above) illuminance of the auxiliary light 7.
  • a single adjuster device 13 can be a touch-screen control interface, a keypad, a foot pedal or similar.
  • the adjuster device 13 is also configured to generate and send a switching off signal SS1 to the control members 12 which, having received such a signal, send a switching off signal ST1 to the operating light 4.
  • the adjuster device 13 is configured to generate and send a switching off signal SS2 to the control members 12 which, having received such a signal, send a switching off signal ST2 to the auxiliary light 7.
  • the adjuster device 13 is also configured to generate and send an activation signal AS1 to the control members 12.
  • the control members 12 Upon receiving such a signal AS1, the control members 12 generate an activation signal TS both of the operating light 4 and of the auxiliary light 7, so that both of the lights switch on.
  • the switching on of the lights determines the activation of the algorithm TA that correlates (as specified above) the illuminances of the two lights.
  • All of the aforementioned signals sent by the control members 12 are generated by one or more current intensity variators 14 (schematised in figure 6 ) active on the lights 4, 7.
  • control members 12 are also configured to control the orientation of the light beam F2 emitted by the auxiliary light 7, to ensure optimal illuminance conditions of the pre-operation field. Concerning this, the control members 12 comprise an electric actuator (not illustrated) active on the optical diffusor 8 to orient it.
  • the electric circuits of the auxiliary light 7 are integrated with those of the operating light 4.
  • the same power supply and/or control cables are used for both lights.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP16179106.6A 2015-07-23 2016-07-12 Gelenkarm für operationsfeldbeleuchtung Active EP3120822B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB20152430 2015-07-23

Publications (2)

Publication Number Publication Date
EP3120822A1 true EP3120822A1 (de) 2017-01-25
EP3120822B1 EP3120822B1 (de) 2020-10-14

Family

ID=54364515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16179106.6A Active EP3120822B1 (de) 2015-07-23 2016-07-12 Gelenkarm für operationsfeldbeleuchtung

Country Status (2)

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EP (1) EP3120822B1 (de)
ES (1) ES2834423T3 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224421A1 (de) * 2002-06-01 2004-04-29 Arne Fiedler Lichtwand
US20130281792A1 (en) * 2011-01-14 2013-10-24 Ondal Holding Gmbh Lighting device
US20150123547A1 (en) * 2013-11-01 2015-05-07 Panasonic Corporation Lighting system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224421A1 (de) * 2002-06-01 2004-04-29 Arne Fiedler Lichtwand
US20130281792A1 (en) * 2011-01-14 2013-10-24 Ondal Holding Gmbh Lighting device
US20150123547A1 (en) * 2013-11-01 2015-05-07 Panasonic Corporation Lighting system

Also Published As

Publication number Publication date
EP3120822B1 (de) 2020-10-14
ES2834423T3 (es) 2021-06-17

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