EP0000735A1 - Dispositif de commande réglable pour moteur d'un fauteuil pour soins dentaires - Google Patents

Dispositif de commande réglable pour moteur d'un fauteuil pour soins dentaires Download PDF

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Publication number
EP0000735A1
EP0000735A1 EP7878100514A EP78100514A EP0000735A1 EP 0000735 A1 EP0000735 A1 EP 0000735A1 EP 7878100514 A EP7878100514 A EP 7878100514A EP 78100514 A EP78100514 A EP 78100514A EP 0000735 A1 EP0000735 A1 EP 0000735A1
Authority
EP
European Patent Office
Prior art keywords
counter
control device
adjusted
drive motor
read
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
EP7878100514A
Other languages
German (de)
English (en)
Other versions
EP0000735B1 (fr
Inventor
Eugen Hohmann
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0000735A1 publication Critical patent/EP0000735A1/fr
Application granted granted Critical
Publication of EP0000735B1 publication Critical patent/EP0000735B1/fr
Expired legal-status Critical Current

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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
    • A61G15/02—Chairs with means to adjust position of patient; Controls therefor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Program-control systems
    • G05B19/02—Program-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/40—Open loop systems, e.g. using stepping motor

Definitions

  • the invention relates to a control device for a dental device, or of which parts thereof can be adjusted in several positions by motor, using actual and setpoint transmitters to form electrical signals which embody the actual or setpoint value of the object to be adjusted. wherein for the object to be adjusted there are several setpoint transmitters embodying the adjustable positions.
  • electromechanical sensors in the form of potentiometers are provided as setpoint and actual value sensors (DE-OS 19 23 262 and DE-OS 22 51 737).
  • setpoint and actual value sensors DE-OS 19 23 262 and DE-OS 22 51 737.
  • the setting and adjustment of the potentiometers and the programming of the setpoint device is relatively complex.
  • the electromechanical feedback devices also tend to malfunction.
  • the positions of the objects to be adjusted are determined by punch cards, which are entered into a transmission device if necessary. Apart from the fact that the handling of such punch cards is relatively cumbersome because the desired card has to be fetched from an archive, such cards are subject to wear and tear.
  • the transmission device for scanning the respective punch card also represents an interference factor.
  • the invention has for its object to provide a control device of the type mentioned, in which no punch cards or the like. are required, and which contains no parts that are difficult to adjust and prone to failure.
  • the object is achieved according to the invention in that the actual value of the object to be adjusted is formed by a clock generator coupled to the associated drive motor, which emits pulses which are picked up by a counter, counted and added or subtracted depending on the direction of rotation of the drive motor, that electronic read-only memories are provided as setpoint transmitters and that a comparator is provided on the one hand with the output of the counter and on the other hand with the read-only memory, which compares the counter reading of the counter with that of the read-only memory, such that the drive motor via a switching amplifier in the presence of a difference each switched on according to the sign of the difference in one or the other direction of rotation and switched off at the same counter reading.
  • Fig. 1 shows a schematic representation of a dental chair seen from the side.
  • the chair essentially consists of a base part 1, to which a parallelogram support arm 2 is articulated, the free end of which is mounted in a support 3 for a seat 4 and a backrest 5.
  • Seat 4 and backrest 5 together form the upper part of the chair, which can be adjusted in height by means of the parallelogram support arm 2 in the two positions I and II indicated by dashed lines.
  • An electric motor-driven spindle drive 6 with a spindle arranged diagonally between two articulation points of the parallelogram arm 2 is provided as the adjusting device.
  • the associated drive motor 7 is arranged outside the parallelogram support arm 2 in a housing of the base part 1. The torque of the motor 7 is transmitted to the spindle via V-belts (not shown) and an intermediate shaft.
  • the parallelogram support arm 2 contains two link arms 8 and 9.
  • a switch 9 attached, which is switched by means of a switching lug 11 arranged on the upper link arm 10 at a certain angular position of the parallelogram arm and thus at a certain height of the seat 4.
  • the switch 9 is used to trigger a correction process.
  • an emergency stop switch arranged on the base part is designated, which is switched either when actuated by the foot of an operator or when the carrier 3 is placed on it.
  • FIG. 13 denotes a program control, which is explained in more detail in FIG. 2 and contains the electronic components required for storage and retrieval.
  • the switch 14 with a toggle switch is designated, with which the drive motor 7 can be switched on in one or the other direction of rotation depending on the toggle position of the switch and thus an upward or downward movement of the seat can be initiated.
  • the switch 14 has a defined rest position in both switching directions, i.e. after releasing the actuator, the switch always returns to its rest position. In this position, the circuit of the drive motor is then interrupted.
  • 15 and 16 denote program switches with which two different, fixed positions for the seat height can be called up. Programs are entered via switch 17.
  • the actual value of the object to be adjusted (here the seat 4) is formed from the switch-on time and the direction of rotation of the drive motor 7.
  • the switch-on time is obtained from the mains voltage applied to the switched-on motor 7.
  • a clock generator 20 outputs corresponding to the mains frequency of the.
  • a correction element 22 which corrects the counter reading of the counter element 21 when the correction switch 9 is switched on .
  • the switch 9 is, as shown in Fig. 1, between the lowest and the uppermost position of the chair fixed to the object to be adjusted. When a certain point is passed, it is closed. As a result, the correction element 21 receives a switching pulse, which causes the count of the counter element 21 to be compared with that of the correction element 22. If the counter reading deviates, the counter member 21 is brought to the counter reading of the correction member 22.
  • an electronic read-only memory 23 for example an EA-PROM memory, is used.
  • 24 denotes a comparator which compares the actual values from the counter 21 with the target values of the memory 23.
  • the coincidence element 25 is a logic logic circuit (coincidence element) which, when the switch 14 or one of the switches 15 or 16, with which the stored programs can be called up, checks whether this switching or control command is correct. For example, if there are opposing commands for this working group, which can happen, for example, by switching on the two switches 15 and 16, that is to say the simultaneous switching on of two different programs, then the coincidence element 25 refuses to pass on a command. If, on the other hand, the control command is clear, it is passed on to the drive motor 7 via a switching amplifier 26. At the same time, the clock generator 20 and the counter 21 are asked to form the actual value. The counter 21 thus runs as long as the motor 7 is switched on.
  • the comparator 24 first checks whether there is a difference between the count of the counter 21 and the count of the memory 23. If there is one, depending on the sign of the difference, the switching amplifier 26 switches on the motor in the required direction of rotation. If the counter reading, that is to say the actual and target values, matches, the comparator 24 triggers the shutdown of the motor 7. The engine 7 is also switched off when the emergency stop button 12 is actuated.
  • the chair To save a program, the chair must first be moved to the desired position by hand. This is done by actuating the hand switch 14. By actuating the program input key 17, the program memory 23 is now prepared via the comparator 24 for receiving the position values. If one of the program keys 15 or 16 to which the desired program is to be assigned is then pressed, the memory element 23 takes over the present actual value from the counter element 21. In the same way, the other program can be stored, which is called up via the switch 16.
  • control device For the sake of simplicity, the principle of the control device is only described for the seat height adjustment of the chair. Control of the backrest inclination can be carried out in the same way.

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  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
EP78100514A 1977-08-11 1978-07-26 Dispositif de commande réglable pour moteur d'un fauteuil pour soins dentaires Expired EP0000735B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2736276 1977-08-11
DE2736276A DE2736276B1 (de) 1977-08-11 1977-08-11 Steuereinrichtung fuer ein zahnaerztliches Geraet

Publications (2)

Publication Number Publication Date
EP0000735A1 true EP0000735A1 (fr) 1979-02-21
EP0000735B1 EP0000735B1 (fr) 1981-03-18

Family

ID=6016178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100514A Expired EP0000735B1 (fr) 1977-08-11 1978-07-26 Dispositif de commande réglable pour moteur d'un fauteuil pour soins dentaires

Country Status (4)

Country Link
US (1) US4250439A (fr)
EP (1) EP0000735B1 (fr)
DE (2) DE2736276B1 (fr)
IT (1) IT1097677B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038451B1 (fr) * 1980-04-18 1986-11-12 Siemens Aktiengesellschaft Dispositif de contrôle pour une chaise dentaire
EP0263912A1 (fr) * 1986-07-22 1988-04-20 LGZ LANDIS & GYR ZUG AG Dispositif de contrôle de positionnement avec pseudo-signal de retour de positionnement

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746630A1 (de) * 1977-10-17 1979-04-26 Koepp Elektronik Gmbh Elektrische steuerschaltung zur lageeinstellung eines aerztlichen behandlungsstuhles oder dergleichen
DE2912755C2 (de) * 1979-03-30 1984-08-09 Kaltenbach & Voigt Gmbh & Co, 7950 Biberach Schaltungsanordnung zur Steuerung der Bewegung eines Arbeitsgerätes, insbesondere eines zahnärztlichen Behandlungsstuhles
JPS607805B2 (ja) * 1979-08-01 1985-02-27 株式会社 モリタ製作所 被制御物の位置の記憶及び読み出し再現制御装置
US4463300A (en) * 1981-09-17 1984-07-31 Printronix, Inc. Linear motor digital servo control
JPS58105834A (ja) * 1981-12-17 1983-06-23 Nissan Motor Co Ltd シ−ト位置自動選定装置
US5214360A (en) * 1992-03-13 1993-05-25 Den-Tal-Ez, Inc. Programmable adjustable chair for medical and dental applications
USD347946S (en) 1993-06-10 1994-06-21 A-Dec, Inc. Dental chair
EP0862348A1 (fr) 1997-02-28 1998-09-02 Alcatel Dispositif d'interface pour l'extraction d'ensembles M de bits à partir d'ensembles N de bits, unité de contrÔle et cellule logique
FR2816184B1 (fr) * 2000-11-08 2003-02-21 Labinal Dispositif d'actionnement d'un element de siege et siege le comportant
JP4338494B2 (ja) * 2003-10-14 2009-10-07 パラマウントベッド株式会社 電動ベッドの動作制御装置
DE102008002805A1 (de) * 2008-03-14 2009-10-01 Aquatec Operations Gmbh Dusch- und Toilettenstuhl
WO2013127940A2 (fr) * 2012-02-28 2013-09-06 Dewertokin Gmbh Système d'actionnement par moteur électrique pour un meuble, procédé de surveillance d'un rapport de largeur d'impulsion d'un système d'actionnement par moteur électrique pour meuble, et meuble correspondant
WO2015172791A2 (fr) * 2014-05-11 2015-11-19 Saber Iman Mohamed Said Mise à niveau de l'unité dentaire
US10632037B2 (en) * 2018-02-01 2020-04-28 Medical Technology Industries, Inc. Programmable examination and procedure tables and chairs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2412550B1 (de) * 1974-03-15 1975-03-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Programmsteuereinrichtung für einen zahnärztlichen Operationsstuhl
DE2418909A1 (de) * 1974-04-19 1975-11-06 Karl Friedrich Dipl Ing Heine Vorrichtung zur positionierung eines verstellbaren maschinenteiles, vorzugsweise bei einer werkzeugmaschine
DE2554059A1 (de) * 1975-12-02 1977-06-08 Koepp Elektronik Gmbh Steuerschaltung zur lageeinstellung eines aerztlichen behandlungsstuhles o.dgl.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370289A (en) * 1965-02-26 1968-02-20 Collins Radio Co Digital-to-analog converter system
US3465217A (en) * 1965-02-26 1969-09-02 Collins Radio Co Digitalized shaft rotation direction control
US3984146A (en) * 1970-03-31 1976-10-05 Siemens Aktiengesellschaft Apparatus for actuating operational chairs
US3675107A (en) * 1970-10-01 1972-07-04 Houdaille Industries Inc Turret indexing control system
DE2251737B2 (de) * 1972-10-21 1978-04-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Zahnarztlicher Patientenstuhl mit Parallelogrammtragarm
JPS52151291A (en) * 1976-06-11 1977-12-15 Taiko Iryoki Seisakusho Kk Chair for netal treatment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2412550B1 (de) * 1974-03-15 1975-03-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Programmsteuereinrichtung für einen zahnärztlichen Operationsstuhl
DE2418909A1 (de) * 1974-04-19 1975-11-06 Karl Friedrich Dipl Ing Heine Vorrichtung zur positionierung eines verstellbaren maschinenteiles, vorzugsweise bei einer werkzeugmaschine
DE2554059A1 (de) * 1975-12-02 1977-06-08 Koepp Elektronik Gmbh Steuerschaltung zur lageeinstellung eines aerztlichen behandlungsstuhles o.dgl.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Jahrgang 8, Heft 4, September '65, New York, L. THOMPSON: "Steppping motor control", Seiten 520-521 *
SCHWEISSEN UND SCHNEIDEN, Jahrgang 17, Heft 3, M{rz 1965, Deutsche Verlag f}r Schweisstechnik, D}sseldorf; W. MASING: "Numerische Steuerungen von Widerstandsschweissmaschinen", Seiten 108-113 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038451B1 (fr) * 1980-04-18 1986-11-12 Siemens Aktiengesellschaft Dispositif de contrôle pour une chaise dentaire
EP0263912A1 (fr) * 1986-07-22 1988-04-20 LGZ LANDIS & GYR ZUG AG Dispositif de contrôle de positionnement avec pseudo-signal de retour de positionnement

Also Published As

Publication number Publication date
EP0000735B1 (fr) 1981-03-18
US4250439A (en) 1981-02-10
IT7826488A0 (it) 1978-08-04
DE2860544D1 (en) 1981-04-16
DE2736276B1 (de) 1978-11-09
IT1097677B (it) 1985-08-31

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