WO2004062077A2 - Trigger-actuated motor control device - Google Patents

Trigger-actuated motor control device Download PDF

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Publication number
WO2004062077A2
WO2004062077A2 PCT/FR2003/003891 FR0303891W WO2004062077A2 WO 2004062077 A2 WO2004062077 A2 WO 2004062077A2 FR 0303891 W FR0303891 W FR 0303891W WO 2004062077 A2 WO2004062077 A2 WO 2004062077A2
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WO
WIPO (PCT)
Prior art keywords
trigger
sensor
axis
magnet
direction
Prior art date
Application number
PCT/FR2003/003891
Other languages
French (fr)
Other versions
WO2004062077A3 (en
Inventor
Fabrice Lamour
Jean-Marc Perret
Original Assignee
Mikroland Innovations Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR02/16821 priority Critical
Priority to FR0216821A priority patent/FR2849552B1/en
Application filed by Mikroland Innovations Sa filed Critical Mikroland Innovations Sa
Publication of WO2004062077A2 publication Critical patent/WO2004062077A2/en
Publication of WO2004062077A3 publication Critical patent/WO2004062077A3/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613Component parts
    • A61B17/1626Control means; Display units

Abstract

The invention relates to a trigger-actuated motor control device. The inventive device comprises: a single slide trigger (3, 30), without electrical contact; a Hall effect sensor (6); and a magnet (4) which can be moved by the trigger in order to control a motor (2), such as an electric motor in a drill-type surgical instrument. According to the invention, two collinear springs (33, 34) return the trigger at rest to an intermediate reference position (XR) which is located between positions (XAV, XAR) for the forward and reverse travel of the motor by moving the magnet and sensor towards and away from one another. A control unit (7) deduces the position of the trigger according to the induced voltage (UH) in the sensor (6) in order to control the motor (2) in one direction of travel and at a speed that is dependent on the position (XG) of the trigger in relation to the above-mentioned reference position (XR).

Description

A gate control of an engine

The present invention relates to a mechanical device for controlling a motor, for example an electric motor included in a portable apparatus in which a tool is driven in axial rotation by the motor. The device is typically similar to a drill used by surgeons.

In known apparatus of this type, the control device comprises an electrical contact on / off and another contact with two positions for controlling a DC motor with two predetermined speeds. In other known devices, the motor is controlled via a relay or via a magnet cooperating with a bimetallic strip.

All these devices do not provide engine speed variation and control devices are sensitive to temperature variations of over a hundred degrees during sterilization of these devices used in surgery.

We know also electric surgical devices of this type described in the three following US patents that include at least one set in Hall sensor and magnet to be less subject to high humidity and high pressures, particularly at temperatures high especially during the sterilization of devices, compared to devices containing only electrical switches.

US Patent 5207697 discloses a surgical apparatus of the type pistol with rotating tool, comprising a control unit for controlling the speed of a DC brushless motor. This device comprises a triggering element of the type sliding gate at the front under the head of the device. The trigger member is pushed rearwardly of the machine to turn a crank which connects two electrical contacts connecting a battery to the control unit which energizes the motor. Continuing to push back the trigger element, a magnet is moved past a Hall effect sensor so that the control unit starts and gradually increases the engine speed. Conversely, releasing the release element reduces the engine speed. However, in this apparatus, the forward of the engine and reverse are selected by an electric contact at three separate positions of the switching element and on the back of one device. US Patent 5268622 also discloses a surgical apparatus of the pistol type comprising a trigger tool for varying the motor speed according to a driving direction thereof selected by a corresponding three-position switch respectively to a forward, stop the motor and the reverse. The rate of change is also controlled by means of a displaceable magnet in front of a Hall effect sensor. The rate of change and the motor driving direction and are controlled respectively by means of two actuators, providing less workability.

In US Patent 5747953 and US 6013991, a drill to surgery commutateurs- comprises two pushers which are actuated separately for an electric motor is rotated in reverse and forward, respectively and simultaneously to the rotation of the motor oscillates between the reversing and before. These three motor speed commands are generated by two sensor assemblies unipolar Hall effect and bipolar magnet and a sensor assembly and Hall effect magnet.

The direction of the motor with variable speed according to these US patents mentioned above are still selected by two actuators, which also offers less maneuverability.

The main objective of the present invention is to provide a mechanical control device wherein the engine speed is precisely controlled both in forward and reverse by the progressive movement of a single gate, while maintaining the advantages a speed control without electrical contact for example with a magnet and a Hall effect sensor.

To achieve this goal, a mechanical device for controlling a motor by a trigger mounted to slide along a first axis in a body, is characterized in that it comprises an elastic means urging the trigger to stand at a reference position when the resilient means exerts opposing forces equal the trigger, the trigger being moved to 1 against the resilient means from the reference position in a first direction along the first axis to control the motor following a first driving direction, and the trigger is moved against the resilient means from the reference position in a second direction along the first axis opposite the first direction to drive the motor in a second direction contrary to the first operation direction. The single gate biased to an intermediate reference position over the entire stroke of the trigger allows for very precisely control both forward and reverse progressively the motor with a variable speed or with a variable acceleration of the engine, which is simpler to use.

The motor can be electric or pneumatic, for example. When the motor is electric, the device comprises a Hall effect sensor and a magnet housed in the body and displaceable relative to one another by movement of the trigger, the magnet and the sensor being close when the trigger is moved in the first direction, and the magnet and the sensor being spaced when the trigger is moved in the second direction.

In a preferred embodiment, the trigger can be used in forward and reverse directions through the two springs in the spring means which extend collinearly in the body parallel to the first axis, have distal ends abutting against the body and proximal ends applied against a projection of the trigger. The trigger is then allowed to stand at the reference position when the springs exert equal forces on the opposed projection of the trigger.

The relative displacement of the magnet and the sensor relative to each other can be obtained by means of a ramp provided on the trigger and oblique to the first axis. The magnet is then fixed in a support means mounted to slide along a second axis contributing to the first axis and biased by a spring against the ramp. Preferably, the ramp comprises first and second contiguous portions oblique to the first axis. The first ramp portion slides on the support means of the magnet which is closer to the sensor when the trigger is moved from the reference position in the first direction along the first axis so that the engine is controlled according to the first driving direction . The second ramp portion slides on the support means of one magnet facing away from the sensor when the trigger is moved from the reference position in the second direction along the first axis opposite the first direction to the motor is controlled according to the second opposite direction of running in the first direction. The end of the magnet means support is applied against a transition ramp between the first and second ramp portions when the trigger is at the reference position.

For controlling the motor in forward and in reverse, the device may comprise measuring means for measuring a voltage induced in the sensor by relative movement of the magnet past the sensor, processing means for deriving a position of the trigger with respect to the reference position of the trigger at rest based on the induced voltage, and control means for controlling the engine according to a driving direction and a speed which depend on the position of the trigger with respect to the position reference.

Other features and advantages of the present invention will become apparent from reading the following description of several preferred embodiments of the invention in the corresponding accompanying drawings in which:

- Figure 1 is a longitudinal sectional view of the control device according to the invention in a surgical device of the drill type with its control unit; Figures 2 and 3 are longitudinal views from below and next to a trigger axis, respectively;

- Figure 4 is a longitudinal view of a magnet holder;

- Figures 5 and 6 are side views and front of a piston integral with the magnet holder, respectively; and

- Figures 7, 8 and 9 are longitudinal side views, longitudinal side and ultimately over a Hall effect sensor holder.

A trigger control device of an engine according to the invention is described below with reference to Figure 1 for a portable device of the AP drill revolver shaped type, for use by surgeons. The control device is located essentially in the body 1 of the arch of the AP device which is substantially transversely oval and extends obliquely to an upper portion 2 and shorter substantially cylindrical for receiving a removable tool head such that drill bit or in a tool holder of the type chuck or the like (not shown) rotatably mounted about an axis 00. the body 1 comprises a motor 2 for rotating the tool. The motor is preferably electric, such as a synchronous motor, also said brushless motor (brushless), or an electric motor with brushes. Alternatively, the motor is a pneumatic motor. The engine of the cylindrical housing is fixed substantially in the second half of a complete duct longitudinal axis CC lacrosse and provided at the rear of the stock body 1 and thus behind the control device according to the invention.

The control device essentially comprises a shaft 3 with a trigger 30 slidably mounted in a cylindrical cavity 10 of the body 1 along a first axis GG substantially parallel to the axis 00 of rotation of the tool. When the engine is in electrical particular, the device includes a 4-magnet embedded in a support 40 which is secured to the lower end of a 5-piston sliding along a second axis A which is oblique relative to the first axis and which is GG substantially parallel to the longitudinal axis CC of the stick 1, and a Hall effect sensor 6 fixed to the upper end of a support 60.

The various components of the device are mostly metal with the exception of supports 40 and 60 described later are made of plastic.

The axis of trigger 3 is located under the front of the upper part of the PA unit containing the tool. 6 and the magnet sensor 4 with the support 40 and the piston 5 are contained in the stick body 1 and are displaceable relative to one another substantially parallel to the axis CC of the stick and obliquely the first axis GG along which the axis of slide trigger.

A front end of the axis of trigger 3 is fitted to the rear of the body of the trigger 30 and fixed thereto by a pin 31. Another pin 32 passes through a rear end of the axis of trigger 3 and s extends along an axis substantially parallel to the second axis AA. An upper end of the pin 32 is projecting from the axis of trigger 3 and is located in a small cylindrical cavity 11 of the body of the PLC apparatus at the axis of tool rotation 00. Two small helical springs 33 and 34 extend collinearly in the cavity 11 parallel to the sliding axis GG of the trigger axis 3. for example, the springs 33 and 34 have the same stiffness and different numbers of turns, typically in a ratio of 1 / 2. They have distal ends that abut against the ends of the cavity in the body of the apparatus 11, and proximate ends which are applied against the protrusion of the gate formed by the upper portion of the pin 32. The springs 33 and 34 exert opposite pressures on the projection are equal and maintain break the axis of trigger 3 when the latter is at a reference position XR, without any pressure being exerted forward or backward by a finger as an index inserted in the handle of the trigger 30.

Alternatively, the two springs 33 and 34 are replaced by a single coil spring having one central turn is linked to the projecting end of the pin 32.

As shown particularly in Figures 2 and 3, a double ramp 35 extending obliquely with respect to the axis GG trigger slide and provided on the side of a notch substantially at right angles and at right angles to edge perpendicular to GG axis. The notch is located at the rear of the axis of trigger 3. The double ramp 35 comprises a first flat portion 35AV for controlling the motor 2 in a first direction of operation that is the forward direction, and a second flat portion 35AR which is for controlling the motor 2 in a second operating direction that is the reverse direction. The front portion 35AV is located forward of the notch and thus before the other portion 35AR and is further away from the sliding axis GG of the trigger than the other ramp portion 35AR. The ramp portions 35AV and 35AR in respective ratios 2/3 and 1/3 of the total length of the ramp for example, and are adjacent and separated by a rest 35R transition that defines the XR reference position of the axis gate 3 with respect to an upper end 51 of the piston 5.

The ramp portion before 35AV forms an angle with the GG αAV axis which is substantially larger than the angle between the αAR 35AR rear ramp portion and GG axis so that the translation of the axis of the trigger 3 to back along a FAV arrow generates an engine acceleration 2 substantially smaller in the direction of forward due to the forward stroke greater as compared to the same forward movement in a FAR boom axis trigger 3, displacement speed module of the axis equal trigger. Typically, the angle of ramp portion before αAV is equal to 30.66 °, and the angle of aft ramp portion αAR is equal to 28.47 °.

The support 40 of the magnet 4 is a cylindrical member whose lower end 41 shaped cylindrical stud includes a housing 42 in which the cylindrical magnet 4 is embedded and adhered. The lower face of the magnet projecting substantially the stud 41 is arranged vis-à-vis the Hall effect sensor 6. The magnetic axis of the magnet 4 is co- linear to the sliding axis AA of the carrier magnet 40 and the piston 5 and perpendicular to the faces of the sensor 6.

As shown in Figures 5 and 6, the piston 5 is essentially a smooth cylindrical shank having at a lower end a threaded pin 50 which is screwed into a threaded hole 43 of the magnet holder 40. The piston 5 and integral with the support of magnet 40 slides in an upper sleeve 12 made of aluminum fixed in a long duct 15 of the butt of the body 1. O-rings 13 and 14 are shown in Figure 1, respectively between the sleeve 12 and the body 1 and between the piston 5 and the sleeve 12.

The upper end 51 of the piston 5 emerges from the sleeve 12 to the upper end of conduit 15 which opens into the cylindrical cavity 10 substantially in front of the double ramp 35 at the rear of the axis of trigger 3. The end piston 51 is beveled axially so as to extend substantially perpendicularly to the double ramp. A helical spring 52 pushes the magnet holder 40 and consequently the upper end 51 of the piston 5 against the double ramp 35. The spring 52 is housed in a sleeve 16 fixed in the lower end of duct 15 opening through the bottom of the stick 1. the spring 52 has one end constantly abuts against a shoulder over an internal thread of the lower leg 16 and a top end pushing a shoulder 44 between the body of the magnet holder 40 and the pin 41 surrounding the magnet 4. the characteristics of the magnet 4 are not affected by sterilization between 120 ° C and 200 ° C. For example, the magnet 4 is samarium cobalt, or aluminum alloy, nickel and cobalt (Ni Co Al) or anisotropic ceramic or ferrite.

As shown in Figures 7 to 9, the support 60 of the sensor 6 is cylindrical and truncated along a longitudinal side 61 and has an external thread 62. In the upper part of the support 60 is formed a notch 63 shallow wherein the sensor is adhered Hall effect 6 in pellet form.

Typically, the sensor chip has a thickness

2 of 1.5 mm and a square section of 5.5 x 5.5 mm, and is affixed to the bottom of the notch 63. A long groove 64 extends longitudinally in the side of truncation 61 of the sensor holder 60 and is becoming deeper from the sensor slot 63 along an inclined bottom 65 with respect to the axis a of the support 60. the inclined base 65 facilitates the release of a cable 70 to the three or four electric whose son the ends are welded to the legs of the pad of the sensor 6 folded downward and the truncation longitudinal side 61 of the support 60 to 1 'within the groove 64.

The thread 62 serves to screw the sensor holder 60 into the threaded sleeve 16 integral with the body 1 to adjust the distance D between the sensor 6 and the magnet 4 when the trigger 30 is not urged by a finger and axis trigger 3 is XR reference position for which the upper end 51 of the piston 5 is pressed against the 35R transition between ramp portions 35AV and 35AR. The distance D of the variation interval corresponds substantially to a central area of ​​the sensor sensitivity range 6 wherein it is sensitive to magnetic induction of the magnet when the latter is moved past the sensor. The sensor holder 60 is locked at the determined desired distance DR of the sensor 6 in the body 1, corresponding to the XR reference portion by means of a lock nut 66 screwed around the lower end of the sensor holder 60 against the lower end of sheath 16. preferably, the Hall effect sensor 6 is programmable, that is to say, includes a microcontroller including a programmable processor of the DSP type (Digital Signal processor). In the microcontroller, the range of Hall voltage induced by the movement of the magnet 4 is selected according to the maximum stroke of the piston 5 provided by the double ramp 35 and according to electrical stress of a control unit 7 connected the sensor cable 70. the unit 7 controls the engine 2 functioning as a function of displacement of the trigger axis 3 and thus of the piston 5 and the magnet 4 in front of the sensor. For example, for a maximum stroke of about 3 mm of the piston 5, is ie between the maximum forward speed and the maximum reverse speed corresponding to the remote ends of the ramp portions 35AV and 35AR, the voltage Hall induced UH is between 0 and 5 volts and is equal to 2.0 volts for the reference position XR, DR. In addition, the microcontroller compensates for temperature differences to which the magnet assembly 4 and Hall effect sensor 6 is subjected when using the PA unit, and possibly during sterilization of the apparatus. As also shown in Figure 1, the control unit 7 essentially comprises a voltage source 71, an analog-digital converter 72, a digital voltage meter 73, a digital processing circuit 74 and a motor control circuit 75 . the control unit 7 may be a removable card fitted under the arch of the device, or included in a small separate housing.

The voltage source 71 may be a battery or a transformer connected to the mains. It produces a voltage VS between two son the cable 70 to be applied to two terminals of the Hall effect sensor 6, also said magnetoresistive sensor so that it is traversed by an excitation current. In the presence of the magnetic induction generated by the magnet 4, the excitation current contributes to generate an electric field, said field area, perpendicular to the excitation current and the magnetic flux density and proportional thereto. Two other terminals of the sensor 6 collect an analog signal in the form of a Hall voltage UH and induced by the presence of the magnet 4 and particularly which is proportional to the magnetic induction collected by the sensor 6, that is i.e. which depends on the distance D between the sensor 6 and the magnet 4.

The Hall voltage UH is applied by two son of the cable 70 to terminals of the analog-digital converter 72 which applies the digitized induced voltage to the voltage meter 73 which measures. Depending on the measured induced voltage UH, the processing circuit 74 derives the XG axis position trigger 3 relative to the upper end 51 of the piston 5 and thus with respect to the reference position XR of the axis trigger 3 break when the piston end 51 is applied against ramp 35R of the transition. The control circuit 75 controls the engine 2 in a direction of forward or reverse and the two engine speed VM dependent XG position of the trigger with respect to the reference position XR.

Preferably, the processing circuit 74 also determines an instantaneous variation of the drive speed VG of the axis of trigger 3 depending on the variation of the induced voltage measured UH. The control circuit 75 then controls the engine 2 with an AM acceleration-dependent variation rate of the trigger. The speed VM and the motor acceleration Am based on the first derivative and the second derivative of the instantaneous position of XG trigger with respect to time. The control circuit 75 adjusts the instantaneous values ​​of speed VM and AM acceleration the motor characteristics 2 in order to control properly, especially in the direction of forward or reverse motor 2 depending on whether XG trigger position is back or in front of the reference position XR of the trigger.

In Figure 1, the axis of trigger 3 is shown at rest in the reference position XR, without any solicitation forwardly or rearwardly by a hand finger into the notch of the trigger 30. The two springs 33 and 34 perform identical pushed onto the end of the pin 32 projecting from the axis of trigger. The upper tapered end 51 of the piston 5 is pushed by the spring 52 against ramp 35R of the transition. The magnet 4 fixed to the piston 5 is at a reference distance RD Hall sensor 6, both vis-à-vis in the lower leg 16. The XG axis position of trigger 3 determined by the circuit processing 74 is for example equal to zero, and the other variables VG and AG are also equal to zero. The engine 2 is stopped.

When the trigger 30 is pulled back, after the FAV arrow in the direction the crosshead body 1, the spring 34 is increasingly compressed and 35AV ramp slides over the bevelled upper end 51 of piston 5. The portion 35AV ramp being furthest from the axis of translation gate GG 35R that rest of the transition, the piston 5 and the magnet holder 40 integral are pushed down by sliding respectively into the holes 12 and 16 to the against the force exerted by the spring 52. the magnet 4 attached through the support 40 at the lower end of the piston 5 progressively approaches the stationary Hall sensor 6. More magnet 4 moves closer to the sensor 6 as shown in DAV on an axis of distance D, the greater the induced Hall voltage UH increases. The control circuit 75 increases or decreases the speed of the motor 2 in proportion to (XAV-XR), that is to say according to the XG position of the trigger 30 with respect to the reference position XR, as shown in XAV on an axis of XG trigger position. Instantly, the walking speed VM before the engine 2 is increased or decreased more or less quickly in function of the instantaneous variation in the induced voltage UH so that the control circuit 75 controls the AM acceleration or deceleration of the engine 2 in dependence the variation of the displacement speed VG of the axis of trigger 3 estimated by the processing circuit 74. If XR from the reference position shown in Figure 1, the trigger 30 is pushed forwardly along the arrow FAR, away the crosshead body 1, the protruding upper end of the pin 32 compresses the spring 33 and the ramp portion 35AR slides on the upper beveled end 51 of the piston 5. the ramp portion 35AR being closest to the axis of translation that gate GG 35R rest of the transition, the piston 5 and the magnet holder 40 are moved upwardly in the direction of the axis of trigger 3 under the thrust exerted by the e spring 52. The magnet 4 fixed to the piston 5 up gradually away from the sensor 6 as shown in DAR on the axis of distance D. The Hall voltage induced UH gradually decreases in proportion to 1 removal of the magnet 4 with respect to the sensor 6. the XG position of the trigger 30 determined by the processing circuit 74 becomes increasingly negative with respect to the trigger reference position XR as shown in XAR on the axis of XG trigger position . The 75 command control circuit then backward movement of the engine 2 at a speed VM proportional to (XR-XAR) and increases or decreases more or less rapidly the motor acceleration Am based on the variation of the velocity VG of the axis trigger 3 estimated by the processing circuit 74.

Claims

1 - Mechanical device for controlling a motor (2) by a trigger (3, 30) slidably mounted along a first axis (GG) in a body (1), characterized in that it comprises resilient means ( 33, 34) biasing the trigger to stand at a reference position (XR) when the resilient means (33, 34) exerts opposing forces equal the trigger, the trigger (3, 30) being moved to one against the medium elastic from the reference position (XR) in a first direction (FAV) along the first axis (GG) for controlling the motor (2) along a first direction of travel, and the trigger (3, 30) being moved to 1 against the resilient means from the reference position (XR) in a second direction (FAR) along the first axis (GG) opposite to the first direction to control the engine (2) along a second direction opposite course to first direction.
2 - Device according to claim 1, comprising a Hall effect sensor (6) and a magnet (4) housed in the body (1) and displaceable relative to one another by movement of the trigger (3, 30), the magnet (4) and the sensor (6) being close together when the trigger (3, 30) is moved in the first direction, and the magnet (4) and the sensor (6) being removed when the trigger (3, 30) is moved in the second direction.
3 - Device according to claim 1 or 2, wherein the elastic means comprises two springs (33, 34) extending co-linearly in the body (1) parallel to the first axis (GG), with distal ends abutting against the body and near ends applied against a projection (32) of the trigger (3, 30), the trigger is at rest at the reference position (XR) when the springs (33, 34) exert opposed forces equal to the projection of the trigger.
4 - Device according to any one of claims 1 to 3, wherein the magnet (4) is facing the Hall effect sensor (6) and fixed in a support means (40, 5) which is mounted for sliding along a second axis (AA) contributing to the first axis (GG) and is biased by a spring
(52) against a ramp (35AV, 35AR) arranged on the trigger (3, 30) and oblique relative to the first axis (GG).
5 - Device according to claim 4, wherein the ramp comprises first and second contiguous portions (35AV, 35AR) oblique to the first axis (GG), the first ramp portion (35AV) slides on the support means (40 , 5) of the magnet (4) which is closer to the sensor (6) when the trigger (3, 30) is moved from the reference position (XR) in the first direction (FAV) along the first axis (GG ), the second ramp portion (35AR) slides on the support means (40, 5) of the magnet (4) remote from the sensor (6) when the trigger (3, 30) is moved from the reference position (XR) in the second direction (FAR) along the first axis (GG) opposite to the first direction, and the magnet holder means (40, 5) is applied against a transition (35R) of the ramp between the first and second ramp portions (35AV, 35AR) when the trigger (3, 30) is at the reference position (XR).
6 - Device according to any one of claims 1 to 5, wherein the magnet (4) is closer to the sensor (6) when the trigger (3, 30) is pulled from the reference position (XR) delivery the first direction (FAV) along the first axis (GG) toward the body (1) so that the motor (2) runs forward, and the magnet (4) is further from the sensor (6) when the trigger (3, 30) is pushed from the reference position (XR) in the second direction (FAR) along the first axis (GG) in moving away the body (1) so that the motor (2) operates in reverse.
7 - Device according to any one of claims 1 to 6, comprising an adjusting means (61, 66) for adjusting the sensor (6) relative to the magnet (4) at a determined distance (CD) when the trigger (3, 30) is at the reference position (XR) •
8 - Device according to claim 7, wherein the adjustment means comprises a support means (60) of the sensor (6) screwed into the body (1) and a lock nut (66) screwed around the sensor carrier medium for immobilize the mean sensor holder to the determined distance (CD) of the magnet (4) in the body (1).
9 - Device according to claim 8, wherein the sensor support means (60) is cylindrical and truncated along a longitudinal side (61) wherein a groove (64) is provided for passing an electric cable (70) connected to the sensor (6).
10 - Device according to any one of claims 1 to 9, wherein the body (1) is that of a device (AP) of drill-shaped type revolver lacrosse contains the sensor (6) and magnet (4) displaceable relative to one another substantially parallel to a longitudinal axis (CC) of the stick and an angle to the first axis (GG).
11 - Device according to any one of claims 1 to 10, comprising a measuring means (71, 72, 73) for measuring an induced voltage (UH) in the sensor (6) by a relative displacement of the magnet ( 4) to the sensor, processing means (74) for deriving a position (XG) of the trigger relative to the reference position (XR) of the trigger at rest based on the induced voltage, and control means (75) for controlling the motor (2) along a driving direction and a speed which depend on the position (XG) of the trigger relative to the reference position (XR).
12 - Device according to claim 11, wherein the processing means (74) determines a variation in the speed (VG) of the trigger (3, 30) as a function of variation of the induced voltage (UH) so that the mean control (75) controls the motor (2) with an acceleration (AM) of the motor (2) in dependence on the rate of change of the trigger.
PCT/FR2003/003891 2002-12-26 2003-12-23 Trigger-actuated motor control device WO2004062077A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR02/16821 2002-12-26
FR0216821A FR2849552B1 (en) 2002-12-26 2002-12-26 A gate control of an engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003303527A AU2003303527A1 (en) 2002-12-26 2003-12-23 Trigger-actuated motor control device
EP20030814489 EP1590881A2 (en) 2002-12-26 2003-12-23 Trigger-actuated motor control device

Publications (2)

Publication Number Publication Date
WO2004062077A2 true WO2004062077A2 (en) 2004-07-22
WO2004062077A3 WO2004062077A3 (en) 2004-08-19

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Application Number Title Priority Date Filing Date
PCT/FR2003/003891 WO2004062077A2 (en) 2002-12-26 2003-12-23 Trigger-actuated motor control device

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EP (1) EP1590881A2 (en)
AU (1) AU2003303527A1 (en)
FR (1) FR2849552B1 (en)
WO (1) WO2004062077A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8109024B2 (en) * 2008-10-19 2012-02-07 Terrill Abst Trigger activated switch

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207697A (en) * 1991-06-27 1993-05-04 Stryker Corporation Battery powered surgical handpiece
US5268622A (en) * 1991-06-27 1993-12-07 Stryker Corporation DC powered surgical handpiece having a motor control circuit
US5747953A (en) * 1996-03-29 1998-05-05 Stryker Corporation Cordless, battery operated surical tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207697A (en) * 1991-06-27 1993-05-04 Stryker Corporation Battery powered surgical handpiece
US5268622A (en) * 1991-06-27 1993-12-07 Stryker Corporation DC powered surgical handpiece having a motor control circuit
US5747953A (en) * 1996-03-29 1998-05-05 Stryker Corporation Cordless, battery operated surical tool
US6013991A (en) * 1996-03-29 2000-01-11 Stryker Corporation Motor control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8109024B2 (en) * 2008-10-19 2012-02-07 Terrill Abst Trigger activated switch

Also Published As

Publication number Publication date
FR2849552A1 (en) 2004-07-02
AU2003303527A1 (en) 2004-07-29
EP1590881A2 (en) 2005-11-02
FR2849552B1 (en) 2005-04-01
AU2003303527A8 (en) 2004-07-29
WO2004062077A3 (en) 2004-08-19

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