WO2005098277A1 - Mecanisme de conversion d'un mouvement rectiligne en un mouvement arciforme utilisable dans un dispositif de balayage. - Google Patents
Mecanisme de conversion d'un mouvement rectiligne en un mouvement arciforme utilisable dans un dispositif de balayage. Download PDFInfo
- Publication number
- WO2005098277A1 WO2005098277A1 PCT/FR2005/000676 FR2005000676W WO2005098277A1 WO 2005098277 A1 WO2005098277 A1 WO 2005098277A1 FR 2005000676 W FR2005000676 W FR 2005000676W WO 2005098277 A1 WO2005098277 A1 WO 2005098277A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mechanism according
- drive
- axis
- transducer element
- pulleys
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
- A61B8/4461—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/10—Eye inspection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/10—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane
- F16H21/16—Gearings comprising primarily only links or levers, with or without slides all movement being in, or parallel to, a single plane for interconverting rotary motion and reciprocating motion
- F16H21/18—Crank gearings; Eccentric gearings
- F16H21/36—Crank gearings; Eccentric gearings without swinging connecting-rod, e.g. with epicyclic parallel motion, slot-and-crank motion
- F16H21/365—Crank gearings; Eccentric gearings without swinging connecting-rod, e.g. with epicyclic parallel motion, slot-and-crank motion with planetary gearing having a ratio of 2:1 between sun gear and planet gear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18152—Belt or chain carried member
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18272—Planetary gearing and slide
Definitions
- the present invention relates to a conversion mechanism usable for driving an object, for example a transducer, along an arcuate path with fixed or variable curvature, from a rectilinear movement.
- these mechanisms generally involve kinematics making it possible to convert the rotational movement of the motor into an alternative rectilinear movement which can be used for driving the transducer element.
- the invention relates more particularly to a mechanism making it possible to convert this rectilinear movement into an arcuate movement of the transducer element.
- the mechanism according to the invention involves:
- this movable structure being able to be coupled to a drive device
- a support piece slidably mounted on said movable structure perpendicular to said path, - at least one connecting rod articulated, on the one hand, to the fixed structure around a first axis of rotation situated in a plane perpendicular to said path and, on the other hand, to the mobile structure around a second axis parallel to the first.
- the arcuate displacement of a point of the said support piece results from the product of its sliding under the action of the connecting rod and of the translation generated by the mobile structure.
- the transducer element is rotatably mounted on the said support piece around a third axis parallel to the first two.
- it further comprises means for driving the transducer element in rotation as a function of the angular position of the said connecting rod.
- these drive means may involve, at least:
- - drive means such as, for example, a belt or a chain coupling said pulleys or sprockets.
- the invention is not limited to a particular type of device for driving the mobile structure along a linear path.
- this drive device could involve a mechanism for converting circular movement (of a motor) / linear movement.
- this mechanism could be of the rod / crank type or even of the planetary / satellite type.
- this mechanism may involve a planetary rotating plate driven in rotation by the output shaft of a motorization, a satellite pinion pivotally mounted on the plate and coming to mesh with a crown with serrated bore coaxial with said shaft and integral of the motor body and an axial drive member carried by a support integral with the pinion, the diameter of the pinion being equal to half the diameter of the bore of the column and the drive member being arranged so that that during the rotation of the plate, said member performs a rectilinear trajectory connecting two diametrically opposite points of the crown.
- the drive member of this mechanism may be coupled to the above mobile structure of the straight line / arcuate movement conversion mechanism either by a rigid link or an articulated link, or by a remote coupling (for example magnetic coupling).
- a drive mechanism is obtained occupying a flat cylindrical volume coaxial with the motor and substantially of the same diameter.
- the movement of the drive member, of the sinusoidal type, is obtained with minimum friction, with low wear and very reduced play.
- Figures 1 and 2 are axial sections of two alternative embodiments of a linear motion ultrasound probe
- Figures 3 and 4 are axial sections at 90 ° to each other of an ultrasound probe with arcuate movement.
- the probe comprises a tabular body 1 divided into two compartments 2, 3 by a transverse partition 4.
- the front compartment 3 houses a transducer element 5 mounted on a support part 6 movable in translation on the partition 4.
- This transducer 5 is designed to emit focused ultrasonic radiation through the anterior wall 7 of the probe.
- this front compartment 3 is sealed and can be filled with a liquid to ensure good transmission of ultrasonic waves.
- the rear compartment 2 contains a gear motor and a mechanism for converting the rotary movement of the output shaft 9 of this motor 8 into a rectilinear reciprocating movement.
- This mechanism involves a cylindrical drive part 10 rotatably mounted coaxially with the output shaft 9 of the motor 8 by means of two bearings (or ball bearings) 11, 12 axially offset carried by a tabular sleeve 13 integral with the motor body 8.
- This tabular sleeve 13 comprises, at its anterior end, an internal toothing (toothed ring 14) on which meshes a satellite pinion 15 pivotally mounted on the drive part 10 by means of a shaft 16 which engages in a cylindrical bore 17 of the drive part 10, axially parallel to the axis 9 of the motor 8, at a predetermined distance from the latter.
- the rotary mounting of the shaft 16 in the bore 17 is ensured by means of a bearing (or a ball bearing) provided between said shaft 16 and the wall of said bore 17.
- the pinion 15 carries by its upper face a support piece 18 of a drive member for the support piece 6 of the transducer element 5.
- the drive member consists of an axial pin 19 which engages in the cavity of a slide 20 movable along a slot 21 provided in the partition 4 and which is attached to the support piece 6.
- the pinion 15 carried by the drive part 18 rotates along a coaxial circular path. Along this path, it meshes with the teeth 14 of the tabular sleeve 13 by turning on itself around an axis parallel to the shaft 9 of the motor 8.
- the movement of spindle 19 which corresponds to the product of the double rotation (planetary / satellite) is a rectilinear reciprocating movement.
- the partition 4 is arranged so that the path of the spindle follows the path of the slot 21 and that thus, the transducer element itself performs a rectilinear reciprocating movement.
- the cavity of the slide 20 intended to receive the pin 19 will be oblong, so as to tolerate differences in alignment.
- the partition 4 comprises instead of a slot, a groove 21 closed by a bottom 22.
- the support part 6 has a T-shape whose vertical branch engages and is guided in the groove 21.
- This vertical branch whose width corresponds to that of the groove 21 includes a central cavity housing a first permanent magnet 23.
- the drive member here consists of a second permanent magnet 24 of reverse polarity with respect to the first, fixed on the upper face of the support piece 18. This magnet 24 is therefore movable along a rectilinear path parallel and in the vicinity of the partition 4.
- the mechanism according to the invention can be used to drive a conversion kinematics, rectilinear movement / arcuate movement.
- FIGS 3 and 4 illustrate an embodiment of such an application.
- this type of probe has the particularity of taking into account the fact that the coma is not really spherical but presents significant variations between its center and the periphery:
- the base plane of the coma has an elliptical shape large diameter D of the order of 12 mm and small diameter, of the order of 11 mm, the difference in diameter coming from the opening and closing of the eyelids.
- the coma has two zones, a central zone which is spherical and a peripheral zone in which the radius of curvature gradually increases towards the limbus. It therefore appears that the cornea is an aspherical and asymmetrical cap, which gradually flattens towards the periphery. Due to the different radii of curvature between the coma and the sclera, the junction of the coma and the sclera presents an apparent sulcus at the level of the iridocorneal angle.
- the advantage of arcuate scanning is to allow the probe to follow a trajectory whose radius of curvature is fixed and substantially equal to the mean radius of curvature of the cornea, while maintaining the axis of the ultrasonic beam orthogonal to a large part of the surface of the coma and / or the retina, in to improve the quality of the ultrasound signal received by the probe while preventing it from approaching the sclera, risking hitting it.
- the probe illustrated in FIGS. 3 and 4 therefore aims to achieve these results, by means of a mechanism making it possible to considerably reduce the dimensions of the probe while maintaining high levels of precision and performance.
- This probe comprises a tabular support structure 25 containing in its lower part a motor 26 whose output shaft 27 drives a cylindrical part 26 'on which a pinion 28 is rotatably mounted by means of an axis 29 which engages in a guide composed of bearing and ball bearings mounted in a bore 30 made in the front face of the cylindrical part, parallel to the axis of the shaft 27 and at a predetermined distance from it.
- This pinion 28 meshes with the teeth of a ring gear 31 carried by a tabular sleeve 32 secured to the body of the motor 26. It here supports a drive part 33 provided with an axial drive finger 34 which, during the rotation of the motor 26, effect a rectilinear displacement along a diameter of the tabular sleeve 32.
- This finger 34 engages in the rear element of a tabular slide 35 passing through a slot 36 made in a transverse partition 37 secured to the tabular sleeve 3-2.
- This slide 35 is produced by assembling two front / rear shouldered tabular elements, the shoulders of which come back on the partition 37. This slide can therefore move along the slot 36 while being held axially in both directions by the shoulders.
- the finger 34 comprises a coaxial bore which extends in the extension of a bore 38 of the front element of the slide 35 so as to constitute therewith a cylindrical bearing.
- a cylindrical support part 39 whose lower part 40 engages in the cylindrical bearing and whose upper part 41 of larger diameter serves, on the one hand, to support an arm 42 carrying the transducer element 43 of the probe and, on the other hand, of articulation to a connecting rod assembly.
- the upper part of the part 39 comprises a coaxial bore in which engages and is fixed by a key a rod whose front end in the form of a fork constitutes a hinge clevis 44.
- This clevis 44 comprises two transverse coaxial bores in which are mounted, on ball bearings, two coaxial journals 45, 46 integral with the transducer element 43.
- the part 39 comprises a transverse bore in which is pivotally mounted, on ball bearings, a transverse axis 47, the two ends of which protrude from the part are respectively integral with the ends of two parallel longitudinal connecting rods 48, 49 constituting the aforementioned connecting rod assembly.
- the ends of these two connecting rods 48, 49, o placed on the axis 47, are provided with two respective coaxial pins 50, 51 axially parallel to the axis 47, which engage and are pivotally mounted in two respective bearings located in an axial plane perpendicular to the slot.
- These bearings are arranged in housings 52, 53 provided in the -tabular structure 25, in the vicinity of its front opening.
- the ends of the axis 47 emerging from the part 39 comprise two respective toothed pulleys 54, 55 located at the right of two corresponding pulleys 56, 57 provided on the pins 45, 46 of the transducer element 43.
- the pairs of facing pulleys are connected by two respective toothed belts 58, 59.
- the axis of the pins 45, 46 describes an arcuate path which is the product of the translational displacement generated by the slide 35 and the axial displacement generated by the connecting rods 48, 49.
- the orientation of the transducer element 43 varies as a function of the orientation of the connecting rods 48, 49 and therefore of the position of the slide 35, the nature of this variation depending on the ratio of the diameters of the toothed pulleys 54-55 and 56-57.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Acoustics & Sound (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Multimedia (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Transmission Devices (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002561765A CA2561765A1 (fr) | 2004-04-01 | 2005-03-17 | Mecanisme de conversion d'un mouvement rectiligne en un mouvement arciforme utilisable dans un dispositif de balayage. |
EP05742629A EP1740849A1 (fr) | 2004-04-01 | 2005-03-17 | Mecanisme de conversion d'un mouvement rectiligne en un mouvement arciforme utilisable dans un dispositif de balayage. |
US11/547,481 US20080134813A1 (en) | 2004-04-01 | 2005-03-17 | Mechanism for Converting a Rectilinear Movement Into an Arcuate Movement Usable in a Scanning Device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0403524A FR2868496B1 (fr) | 2004-04-01 | 2004-04-01 | Mecanisme de conversion d'un mouvement rectiligne en un mouvement arciforme utilisable dans un dispositif de balayage |
FR0403524 | 2004-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005098277A1 true WO2005098277A1 (fr) | 2005-10-20 |
Family
ID=34945841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2005/000676 WO2005098277A1 (fr) | 2004-04-01 | 2005-03-17 | Mecanisme de conversion d'un mouvement rectiligne en un mouvement arciforme utilisable dans un dispositif de balayage. |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080134813A1 (fr) |
EP (1) | EP1740849A1 (fr) |
CA (1) | CA2561765A1 (fr) |
FR (1) | FR2868496B1 (fr) |
WO (1) | WO2005098277A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013170053A1 (fr) | 2012-05-09 | 2013-11-14 | The Regents Of The University Of Michigan | Transducteur linéaire à entraînement magnétique pour imagerie ultrasonore |
CN108087521A (zh) * | 2018-01-29 | 2018-05-29 | 潍坊海丰自动化科技有限公司 | 旋转直线运动一体装置及设备 |
CN113602489B (zh) * | 2021-10-11 | 2021-12-07 | 中国空气动力研究与发展中心低速空气动力研究所 | 一种大前进比旋翼桨叶反流失速主动控制后缘小翼装置 |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2858711A (en) * | 1954-12-16 | 1958-11-04 | Blackstone Henry | Mechanical scan drive system |
DE2406274A1 (de) * | 1974-02-09 | 1975-08-28 | Ulrich Dipl Ing Grajecki | Vorrichtung zur uebertragung von bewegungen |
US4215585A (en) * | 1976-04-23 | 1980-08-05 | Tokyo Shibaura Electric Co., Ltd. | Ultrasonic scanner |
FR2448829A1 (fr) * | 1979-02-09 | 1980-09-05 | Litton Industrial Products | Appareil d'exploration et procede de formation d'images par ultrasons |
US4421118A (en) * | 1981-08-12 | 1983-12-20 | Smithkline Instruments, Inc. | Ultrasonic transducer |
US4649925A (en) * | 1985-01-14 | 1987-03-17 | Technicare Corporation | Ultrasonic transducer probe drive mechanism with position sensor |
US4757722A (en) * | 1986-10-27 | 1988-07-19 | Glover Marvin J | Motion conversion apparatus |
FR2688923A1 (fr) * | 1992-03-23 | 1993-09-24 | Sagem | Dispositif d'entrainement magnetique etanche sans traversee de paroi et sonde ultra-sonore en comportant application. |
US5331962A (en) * | 1993-04-16 | 1994-07-26 | Cornell Research Foundation Inc. | Ultrasound system for corneal biometry |
US5333612A (en) * | 1993-08-26 | 1994-08-02 | Wild John J | Volumetric breast interogation device |
FR2839543A1 (fr) * | 2002-05-07 | 2003-11-14 | Quantel Medical | Systeme de balayage selon un trajet arciforme a rayon de courbure variable |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4785819A (en) * | 1984-03-30 | 1988-11-22 | Technicare Corporation | Ultrasonic in-line sector probe |
US5587637A (en) * | 1994-01-10 | 1996-12-24 | Tatsumo Kabushiki Kaisha | Robot arm device capable of conveying an article in circumferential and radial directions |
US6551220B1 (en) * | 1999-05-27 | 2003-04-22 | Kurt Manufacturing Company, Inc. | Exercise resistance device with magnets |
FR2868495B1 (fr) * | 2004-04-01 | 2007-11-23 | Quantel Medical Sa | Mecanisme d'entrainement utilisable dans un dispositif de balayage |
-
2004
- 2004-04-01 FR FR0403524A patent/FR2868496B1/fr not_active Expired - Fee Related
-
2005
- 2005-03-17 EP EP05742629A patent/EP1740849A1/fr not_active Withdrawn
- 2005-03-17 CA CA002561765A patent/CA2561765A1/fr not_active Abandoned
- 2005-03-17 WO PCT/FR2005/000676 patent/WO2005098277A1/fr active Application Filing
- 2005-03-17 US US11/547,481 patent/US20080134813A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2858711A (en) * | 1954-12-16 | 1958-11-04 | Blackstone Henry | Mechanical scan drive system |
DE2406274A1 (de) * | 1974-02-09 | 1975-08-28 | Ulrich Dipl Ing Grajecki | Vorrichtung zur uebertragung von bewegungen |
US4215585A (en) * | 1976-04-23 | 1980-08-05 | Tokyo Shibaura Electric Co., Ltd. | Ultrasonic scanner |
FR2448829A1 (fr) * | 1979-02-09 | 1980-09-05 | Litton Industrial Products | Appareil d'exploration et procede de formation d'images par ultrasons |
US4421118A (en) * | 1981-08-12 | 1983-12-20 | Smithkline Instruments, Inc. | Ultrasonic transducer |
US4649925A (en) * | 1985-01-14 | 1987-03-17 | Technicare Corporation | Ultrasonic transducer probe drive mechanism with position sensor |
US4757722A (en) * | 1986-10-27 | 1988-07-19 | Glover Marvin J | Motion conversion apparatus |
FR2688923A1 (fr) * | 1992-03-23 | 1993-09-24 | Sagem | Dispositif d'entrainement magnetique etanche sans traversee de paroi et sonde ultra-sonore en comportant application. |
US5331962A (en) * | 1993-04-16 | 1994-07-26 | Cornell Research Foundation Inc. | Ultrasound system for corneal biometry |
US5333612A (en) * | 1993-08-26 | 1994-08-02 | Wild John J | Volumetric breast interogation device |
FR2839543A1 (fr) * | 2002-05-07 | 2003-11-14 | Quantel Medical | Systeme de balayage selon un trajet arciforme a rayon de courbure variable |
Also Published As
Publication number | Publication date |
---|---|
CA2561765A1 (fr) | 2005-10-20 |
FR2868496B1 (fr) | 2006-06-30 |
EP1740849A1 (fr) | 2007-01-10 |
FR2868496A1 (fr) | 2005-10-07 |
US20080134813A1 (en) | 2008-06-12 |
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