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Patent US4855704 - Joystick for generating electric control signals - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA joystick for generating electric control signals comprises the following components: a housing, an operating rod, a universal joint for the operating rod, sensors and an element acting upon these in a positionally dependent manner. The distance of the element from the sensors can be varied by the operating...http://www.google.com/patents/US4855704?utm_source=gb-gplus-sharePatent US4855704 - Joystick for generating electric control signalsAdvanced Patent SearchPublication numberUS4855704 APublication typeGrantApplication numberUS 07/210,649Publication dateAug 8, 1989Filing dateJun 23, 1988Priority dateJul 3, 1987Fee statusLapsedAlso published asDE3722046C1Publication number07210649, 210649, US 4855704 A, US 4855704A, US-A-4855704, US4855704 A, US4855704AInventorsManfred BetzOriginal AssigneeGustav Magenwirth Gmbh & Co.Export CitationBiBTeX, EndNote, RefManPatent Citations (4), Non-Patent Citations (6), Referenced by (46), Classifications (13), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetJoystick for generating electric control signals
US 4855704 AAbstract
A joystick for generating electric control signals comprises the following components: a housing, an operating rod, a universal joint for the operating rod, sensors and an element acting upon these in a positionally dependent manner. The distance of the element from the sensors can be varied by the operating rod. The sensors are in the form of induction coils through which alternating current circulates. The induction coils, in turn, are each part of an electric oscillatory circuit. It is adequate to provide only two such sensors. The element acting upon the induction coils is an induction body, more particularly, in the form of a spherical part which is rigidly connected to the operating rod. The center of the induction body is spaced from the center of the universal joint. By changing the distance of the induction body from the induction coils, the amplitude, frequency and/or phase of the respective oscillatory circuit can be changed in order to generate the electric control signals.
1. Joystick for generating electric control signals comprising a housing, an operating rod, a universal joint which is arranged in said housing and on which said operating rod is movably mounted, sensors arranged in said housing and an element acting upon said sensors in a positionally dependent manner, the distance of said element from said sensors being variable by said operating rod, said sensors being in the form of induction coils through which alternating current circulates, said induction coils each being part of an electric oscillatory circuit, said element acting upon said induction coils being an induction body which is rigidly connected to said operating rod, and the amplitude, frequency and/or phase of the respective oscillatory circuit being changeable by changing the distance of said induction body from said induction coils in order to generate the electric control signals, characterized in that the longitudinal axis of said induction coils (21, 22) intersect in the center (M1) of said universal joint (6, 9, 7, 8; 39) which is designed as a ball-and-socket joint, in that in its zero position, said operating rod (11) extends perpendicularly to the plane defined by the longitudinal axes of said induction coils (21, 22), and in that said induction body (19) is part of a sphere, the center (M2) of which is spaced from said center (M1) of said universal joint perpendicular to this plane.
2. Joystick as defined in claim 1, characterized in that said induction coils (21, 22) are two in number, said induction coils including an angle of generally 90 degrees with respect to the axis of said operating rod (11).
3. Joystick as defined in claims 1 or 2, characterized in that said universal joint is a ball-and-socket joint with a socket (6) and a joint ball (9).
4. Joystick as defined in claim 1, characterized in that said induction body is a spherical shell part arranged on the outside of said joint ball (9).
5. Joystick as defined in claim 1, characterized in that said joint ball (39) consists of an electrically neutral plastic material and said induction body is a spherical part (49) arranged inside of said joint ball.
6. Joystick as defined in claims 1, 2, 4 or 5 characterized in that said operating rod (11) carries on an extension a pin (23) which does not reflect light, said pin extending into a path of two light barriers (24, 25) arranged in said housing (1) and interrupting both light barriers when said operating rod is in its zero position.
7. Joystick as defined in claim 3, characterized in that said ball socket (6) is mounted in said housing (1) for rotation about the axis of said operating rod (11), and an actuating pin (33) is arranged on said joint ball (9) for positive transmission of the rotation of said operating rod about its axis to said ball socket (6), and in that a lug (26) is arranged on said ball socket (6) to interrupt at least one light barrier (27, 28) when said ball socket is in a rotated position.
8. Joystick as defined in claim 7, characterized in that the angular rotational position of said ball socket (6) in which said light barrier (27, 28) is interrupted is defined by ball (29) designed for detent-type action.
9. Joystick as defined in claim 3, characterized in that said induction body is a spherical shell part arranged on the outside of said joint ball (9).
10. Joystick as defined in claim 3, characterized in that said joint ball (39) consists of an electrically neutral plastic material and said induction body is a spherical part (49) arranged inside of said joint ball.
11. Joystick as defined in claim 3, characterized in that said operating rod (11) carries on an extension a pin (23) which does not not reflect light, said pin extending into a path of two light barriers (24, 25) arranged in said housing (1) and interrupting both light barriers when said operating rod is in its zero position.
The invention relates to a joystick for generating electric control signals as defined in the preamble of Patent claim 1.
Joysticks of this kind are used in remote control systems, for example, in machines such as excavators, cranes or the like.
A joystick of the generic kind is described, for example, in German published Patent Application 3,504,387. Further joysticks for the generation of electric control signals are known from the German periodical "Elektronik 1987", 40; French published Patent Application 2,428,867; Japanese publication 59-53936 (A): Patents Abstracts of Japan P- 288, July 20, 1984, Vol. 8, No. 157 and the U.S. journal: IBM Technical Disclosure Bulletin, Vol. 27, No. 8, January 1985, pages 4732 to 4733.
The mechanical and electrical design of the known joysticks is complicated and prone to failure.
The object of the invention is to simplify the mechanical and electrical design and the mode of operation of a joystick of the generic kind, thereby increasing its operational reliability and simultaneously reducing the production costs.
The object is accomplished in accordance with the invention by the characterizing features of Patent claim 1.
In comparison with known joysticks, the joystick according to the invention is of simpler mechanical and electrical design and its mode of operation is very simple and reliable. In addition, the joystick proposed by the invention can be produced at comparatively reasonable cost.
The following description of preferred embodiments serves in conjunction with the appended drawings to explain the invention in further detail.
FIG. 1 is an axial sectional view of a joystick for generating electric control signals, with some parts shown schematically;
FIG. 4 is a schematic view of an embodiment of a joystick representing a modification of the joystick of FIG. 1.
As shown in FIG. 1, a housing 1 is attached to an immobile part 2 of the structure of an excavator or a similar machine. Between a first part 3 of the housing and a second part 4 of the housing, a ball socket 6 is rotatably supported by an annular colar 5, with the axis of rotation extending in the drawing plane of FIG. 1 and perpendicularly to collar 5. The ball socket 6, in turn, consists of socket parts 7 and 8 bolted together, with the collar 5 mentioned above being formed on socket part 8. The socket parts 7 and 8 together form a ball cup in which a joint ball 9 can be universally rotated. The center of the joint ball 9 is designated M1 in FIG. 1. The socket 6 and the ball 9 constitute a universal joint, the center of rotation of which is located at M1.
An operating rod 11 is rigidly attached to the joint ball 9 and is, therefore, pivotable in all directions via the univeral joint mentioned above. The top surface 12 of housing part 3 has an opening 13 surrounding the operating rod 11 without touching it. The opening 13 is covered by a repositioning disc 14 which slides on the top surface 12. A bushing 15 is integrally attached to the repositioning disc 14 or forms part of it and the operating rod 11 passes through the bushing. A handle 16 is attached to the free end of the operating rod 11. A helical compression spring 17 placed between the handle 16 and the repositioning disc 14 attempts to return the pivoted operating rod 11 into the zero position (as shown in FIG. 1) when the repositioning disc 14 has slid laterally and has been tilted on the top surface 12 by the pivoting motion of the operating rod 11. A bellows 18 installed between the handle 16 and the immobile part 2 of the machine prevents the entry of dirt into the housing 1.
The operating rod 11 extends beyond the joint ball 9 and carries an induction body 19 there in the form of part of a hollow sphere. The center M2 of the hollow sphere forming the induction body 19 is located eccentrically (in Figure 1 upwards) with respect to the center M1 of the joint ball 9. Two induction coils 21, 22 are firmly arranged as sensors in housing 1 (cf. also FIG. 2). The axes of the coils intersect at the center M1 of the joint ball 9. The plane defined by these coils extends perpendicularly to the zero position of the operating rod 11. With respect to the axis of the operating rod 11, the induction coils 21, 22 include an angle of 90 degrees. Each of the induction coils 21, 22 forms part of an electric oscillatory circuit known per se and associated with alternating currents of specific amplitude, frequency and phase which also circulate through coils 21, 22.
If the operating rod 11 is tilted in any direction, the distance between the hollow-sphere-type induction body 19 and the induction coils 21, 22 changes due to the eccentricity between the joint ball 9 and the induction body 19. This change in distance influences the induction coils 21, 22 inductively in such a manner as to cause characteristic changes in the amplitude, frequency and/or phase of the currents flowing in the oscillatory circuits associated with the induction coils. These changes can be utilized in a known way for the generation of electric control signals which are related to the angular positions of the joystick described herein and comprised of the operating rod 11 and the handle 16. These control signals can, in turn, be utilized for controlling the motion of machines, for example, the scoop of an excavator.
The electrical and mechanical design of the joystick described herein is extremly simple, rugged and operationally reliable. In particular, merely two induction coils are required as sensors. If the induction body 19 is of suitable geometrical design, which may include shapes other than the spherical configuration, tilting of the joystick in one direction may not necessarily change the measured value in the opposite direction. In the known joysticks, usually several coils are placed around the joystick and continuous mutual computation and evaluation of the individual measured values of the coils is required. In principle, it is, however, also possible for more than two sensors to be provided in the joystick described herein without negatively affecting the simplicity of the design and further advantages.
At an extension continuing beyond the induction body 19, the operating rod 11 carries a comparatively short pin 23, the surface of which, for example, due to a matte black finish, does not reflect light. In the zero position of the operating rod 11, this pin 23 is located precisely at the point of intersection of two light barriers (FIG. 3) which are essentially perpendicular to each other and are each comprised in a known way of a transmitter 24 and a receiver 25. This arrangement allows detection and verification of the zero position of the operating rod. If the operating rod should not be in the zero position, at least one of the light barriers will furnish a signal indicative of this.
As mentioned above, the ball socket 6 and hence the entire universal joint is supported for rotation inside housing 1 by the collar 5 of socket part 8 which engages between housing parts 3 and 4. Accordingly, the universal joint can be rotated within housing 1 to generate additional control signals (without influencing the induction coils 21, 22 by the spherical induction body 19). For this purpose, a narrow lug 26 extends downwards from the socket part 8. By rotating the socket 6, the lug 26 can be brought alternatively into the path of light of the fork-shaped light barriers 27, 28 (FIG. 3) to generate additional control signals by the angular rotation of the joystick.
A spring-loaded ball 29 which can engage dimples 31, 32 fixed in the housing (FIG. 2) to achieve a detent-type action is arranged in socket part 8. The dimples 31, 32 are coordinated with the angular rotational positions of the socket 6 in which the lug 26 interrupts the path of light in the light barriers 27, 28, respectively. A further dimple for the ball 29 may be provided between dimples 31, 32 to define the zero position of the lug 26 and hence of the socket 6 between the light barriers 27, 28.
To ensure positive transmission of the rotation of the operating rod 11 about its longitudinal axis to the socket 6, a cylindrical actuating pin 33 protrudes laterally from the joint ball 9. The longitudinal axis of the pin 33 coincides with the longitudinal axis of the induction coil 21 and runs through the center of the joint ball 9. Accordingly, the actuating pin 33 does not obstruct tilting motion of the operating rod 11 in a plane perpendicular to the drawing plane of FIG. 1. The actuating pin 33 also positively engages a groove 34 formed in socket parts 7, 8 (FIG. 2). This configuration ensures, on the one hand, positive rotation of the socket 6 along with rotation of the operating rod 11 about its longitudinal axis and, on the other hand, tilting motion of the operating rod 11 in the drawing plane of FIG. 1.
In the modified embodiment of a joystick shown schematically only in FIG. 4, the operating rod 11 is rigidly attached to a joint ball 39 made of an electro-inductively neutral material such as, for example, plastic material. An induction body 49, preferably in the form of a metallic sphere, is located inside of the joint ball 39 and is likewise rigidly attached to the operating rod 11, with the centers M1 and M2 of the two spheres 39 and 49 being spaced apart in the same way as indicated in FIG. 1. The joint ball 39 is enclosed by two socket parts 7, 8 which, in this case, may also accommodate the sensors (induction coil 21). Otherwise, the mode of operation of the embodiment according to FIG. 4 corresponds to that of the embodiment according to FIG. 1.
The present disclosure relates to the subject matter disclosed in German application No. P 37 22 046.2 of July 3, 1987, the entire specification of which is incorporated herein by reference.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3193784 *Jul 13, 1961Jul 6, 1965Gen Motors CorpVertical sensing unitUS4306208 *Jan 10, 1980Dec 15, 1981Ledex, Inc.Joy-stick controllerDE3504387A1 *Feb 8, 1985Aug 14, 1985Telemecanique ElectriqueAnaloger steuerschalterFR2428867A1 * Title not available* Cited by examinerNon-Patent CitationsReference1Elektronik, "Elektronik Notizen, " 11/29.5, 1987, p. 40.2 *Elektronik, Elektronik Notizen, 11/29.5, 1987, p. 40.3 *IBM Technical Disclosure Bulletin, vol. 27, No. 8, 1985, pp. 4732 4733.4IBM Technical Disclosure Bulletin, vol. 27, No. 8, 1985, pp. 4732-4733.5 *Patents Abstracts of Japan, vol. 8, No. 157, 1984 (Abstract of Japanese Appl. 57 164349 of 9/21/82).6Patents Abstracts of Japan, vol. 8, No. 157, 1984 (Abstract of Japanese Appl. 57-164349 of 9/21/82).* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5532476 *Dec 21, 1994Jul 2, 1996Mikan; Peter J.Redundant indicator for detecting neutral position of joystick memberUS5532529 *Nov 14, 1994Jul 2, 1996Caterpillar Inc.Contactless inductance joystick switchUS5589828 *Mar 5, 1992Dec 31, 1996Armstrong; Brad A.6 Degrees of freedom controller with capability of tactile feedbackUS5619195 *Dec 29, 1995Apr 8, 1997Charles D. HayesMulti-axial position sensing apparatusUS5911627 *Oct 23, 1997Jun 15, 1999Logitech, Inc.Electromagnetic joystick using varying overlap of coils and conductive elementsUS6170606 *Jun 28, 1996Jan 9, 2001Safety Dynamicon, Inc.Analog controlUS6248018Sep 15, 1998Jun 19, 2001Logitech, Inc.Electromagnetic pointing device using varying overlap of coils and conductive elementsUS6259433May 14, 1996Jul 10, 2001Norman H. MeyersDigital optical joystick with mechanically magnified resolutionUS6320284Dec 22, 1999Nov 20, 2001Engineering Matters, Inc.Motor assembly allowing output in multiple degrees of freedomUS6445311Dec 21, 2000Sep 3, 2002G. Burnell HohlInductive joystickUS6456778Dec 8, 2000Sep 24, 2002Brad A. ArmstrongAnalog controls housed with electronic displays for video recorders and camerasUS6480183Jul 23, 1999Nov 12, 2002Logitech Europe S.A.Digital joystick using capacitive sensorUS6483481Nov 14, 2000Nov 19, 2002Hrl Laboratories, LlcTextured surface having high electromagnetic impedance in multiple frequency bandsUS6664666Sep 18, 2001Dec 16, 2003Engineering Matters, Inc.Motor assembly allowing output in multiple degrees of freedomUS6724198Dec 21, 2000Apr 20, 2004G. Burnell HohlInductive sensory apparatusUS6906700Nov 16, 2000Jun 14, 2005Anascape3D controller with vibrationUS6909205Sep 23, 2003Jun 21, 2005Engineering Matters, Inc.Motor assembly allowing output in multiple degrees of freedomUS6992602Feb 21, 2001Jan 31, 2006Penny & Giles Controls LimitedJoystick controllerUS7331226May 20, 2005Feb 19, 2008Powergrid Fitness, Inc.Force measurement system for an isometric exercise deviceUS7530929Feb 24, 2006May 12, 2009Powergrid Fitness, Inc.Motion platform system and method of rotating a motion platform about plural axesUS7554527Feb 5, 2003Jun 30, 2009Sensopad LimitedSensing apparatus and methodUS7569782 *Jan 15, 2008Aug 4, 2009Preh GmbhMultistage switchUS7699755Feb 9, 2006Apr 20, 2010Ialabs-Ca, LlcIsometric exercise system and method of facilitating user exercise during video game playUS7727117Mar 10, 2006Jun 1, 2010Ialabs-Ca, LlcMethod and apparatus for operatively controlling a virtual reality scenario with a physically demanding interfaceUS8079251Jul 28, 2009Dec 20, 2011Nintendo Co., Ltd.Computer readable storage medium storing information processing program and information processing apparatusUS8100770Mar 4, 2008Jan 24, 2012Nintendo Co., Ltd.Game controller, storage medium storing game program, and game apparatusUS8152640Apr 7, 2009Apr 10, 2012Nintendo Co., Ltd.Information processing apparatus and computer readable storage mediumUS8387437Jan 18, 2008Mar 5, 2013Nintendo Co., Ltd.Weight applying unit for calibration and weight applying method for calibrationUS8395582Sep 17, 2009Mar 12, 2013Nintendo Co., Ltd.Computer-readable storage medium and information processing apparatusUS8574080Dec 7, 2011Nov 5, 2013Nintendo Co., Ltd.Game controller, storage medium storing game program, and game apparatusUS8612247Apr 3, 2009Dec 17, 2013Nintendo Co., Ltd.Biological information management systemUS8654073Dec 7, 2009Feb 18, 2014Nintendo Co., Ltd.Information processing program having computer-readable storage medium therein and information processing apparatusUS8707768Nov 4, 2011Apr 29, 2014Nintendo Co., Ltd.Computer readable storage medium storing information processing program and information processing apparatusUS8740705May 21, 2013Jun 3, 2014Nintendo Co., Ltd.Game controller, storage medium storing game program, and game apparatusUS8751179Nov 19, 2009Jun 10, 2014Nintendo Co., Ltd.Computer-readable storage medium having stored information processing program thereon, and information processing apparatusUS8887547Jul 27, 2011Nov 18, 2014Nintendo Co., Ltd.Weight applying unit for calibration and weight applying method for calibrationUS8905844Sep 8, 2008Dec 9, 2014Nintendo Co., Ltd.Storage medium storing load detecting program and load detecting apparatusUS8991429 *Feb 2, 2010Mar 31, 2015Hitachi Construction Machinery Co., Ltd.Pilot valve assemblyUS9081426Sep 30, 2005Jul 14, 2015Anascape, Ltd.Image controllerUS20020000971 *Jun 26, 2001Jan 3, 2002Armstrong Brad A.Image controllerUS20040124717 *Sep 23, 2003Jul 1, 2004Corcoran Christopher J.Motor assembly allowing output in multiple degrees of freedomUS20110284785 *Feb 2, 2010Nov 24, 2011Mitsuhiro YoshimotoPilot valve assembleyWO2001069343A1 *Feb 21, 2001Sep 20, 2001Alfred John AlexanderJoystick controllerWO2002056328A1Nov 15, 2001Jul 18, 2002Ict IncInductive joystickaWO2003067181A2 *Feb 5, 2003Aug 14, 2003Sensopad Technologies LtdSensing apparatus and methodWO2007062237A2 *Nov 28, 2006May 31, 2007Powergrid Fitness IncMethod and apparatus for operatively controlling a virtual reality scenario with a physically demanding interface* Cited by examinerClassifications U.S. Classification336/132, 341/20, 340/870.31, 336/135International ClassificationG05G9/047Cooperative ClassificationG05G2009/04755, G05G9/04785, G05G2009/04707, G05G2009/04759, G05G2009/04766, G05G9/047European ClassificationG05G9/047, G05G9/047SLegal EventsDateCodeEventDescriptionJun 23, 1988ASAssignmentOwner name: GUSTAV MAGENWIRTH GMBH & CO., STUTTGARTER STR. 48,Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BETZ, MANFRED;REEL/FRAME:004895/0232Effective date: 19880608Mar 9, 1993REMIMaintenance fee reminder mailedAug 8, 1993LAPSLapse for failure to pay maintenance feesOct 26, 1993FPExpired due to failure to pay maintenance feeEffective date: 19930808RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services