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WO2011001733A1 - Potentiomètre - Google Patents

Potentiomètre Download PDF

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Publication number
WO2011001733A1
WO2011001733A1 PCT/JP2010/056826 JP2010056826W WO2011001733A1 WO 2011001733 A1 WO2011001733 A1 WO 2011001733A1 JP 2010056826 W JP2010056826 W JP 2010056826W WO 2011001733 A1 WO2011001733 A1 WO 2011001733A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
torsion coil
coil spring
rotor
case
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.)
Ceased
Application number
PCT/JP2010/056826
Other languages
English (en)
Japanese (ja)
Inventor
勝 宮城
一広 渡辺
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.)
Tokyo Cosmos Electric Co Ltd
Original Assignee
Tokyo Cosmos Electric Co Ltd
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 Tokyo Cosmos Electric Co Ltd filed Critical Tokyo Cosmos Electric Co Ltd
Priority to HK13103374.5A priority Critical patent/HK1176115B/xx
Priority to CN201080025352.2A priority patent/CN102803903B/zh
Publication of WO2011001733A1 publication Critical patent/WO2011001733A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
    • G01D5/165—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance by relative movement of a point of contact or actuation and a resistive track
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/10—Elements for damping the movement of parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/16—Elements for restraining, or preventing the movement of, parts, e.g. for zeroising
    • G01D11/18—Springs

Definitions

  • the present invention relates to a potentiometer equipped with an automatic return mechanism for a rotating shaft, which is used for detecting the position of various devices.
  • FIG. 1 shows an exploded perspective view of a potentiometer described in Patent Document 1 as a conventional example of this type of potentiometer.
  • reference numeral 11 denotes a slider receiver.
  • a boss 11b projects from the center of the bottom plate 11a, and a shaft 11c is formed upward and downward from the center.
  • a pair of regulating walls 11d and 11e are erected on the outer periphery of the bottom plate 11a while maintaining a predetermined angle.
  • the case 12 is a torsion coil spring that surrounds the boss 11b, and has a multi-turn laminated portion 12a, and an upper bent portion 12b and a lower bent portion 12c at the open end
  • 13 is a case that houses the slider receiver 11.
  • the case 13 has a notch 13a, and both side edges of the notch 13a are spring receivers 13b and 13c.
  • the upper shaft 11 c of the slider receiver 11 is supported by the hole 13 d of the case 13, and the lower shaft 11 c is supported by the hole 15 b of the insulating substrate 15.
  • the upper bent portion 12b of the torsion coil spring 12 is elastically locked to the spring receiver 13b and the restriction wall 11d
  • the lower bent portion 12c is elastically locked to the spring receiver 13c and the restriction wall 11e.
  • the end surfaces of the regulating walls 11d and 11e provided on the slider receiver 11 and the end surfaces of the spring receivers 13b and 13c provided on the case 13 are both flat. Therefore, the contact between the upper bent portion 12b and the lower bent portion 12c of the torsion coil spring 12 and the restriction walls 11d and 11e and the spring receivers 13b and 13c is basically a line contact.
  • the end surfaces of the regulating walls 11d and 11e and the end surfaces of the spring receivers 13b and 13c may not be aligned with each other in a stationary state (neutral position) as shown in FIG. , 11e may be wider than the gap between the pair of spring receivers 13b, 13c, or vice versa.
  • An object of the present invention is to provide a potentiometer having excellent detection accuracy by preventing backlash from occurring in a rotating shaft even in a neutral position in view of the above-described problems.
  • the substrate on which the resistor pattern is formed, the rotor to which the slider that is in sliding contact with the resistor pattern is fixed, and the torsion coil spring are accommodated in the case, and the torsion coil spring is inserted.
  • the rotor surrounds the torsion coil spring and includes a pair of spring guides having a circular arc shape along the outer diameter of the torsion coil spring. Both end portions led out in the direction are elastically contacted with both end surfaces in the circumferential direction of one spring guide of the pair of spring guides and both end surfaces in the circumferential direction of spring receivers protruding from the inner peripheral surface of the case. Both end surfaces in the direction and both end surfaces in the circumferential direction of the spring receiver are formed in point contact with both ends of the torsion coil spring.
  • both end portions of the torsion coil spring for automatically returning the rotating shaft are in point contact with both end surfaces of the spring guide of the rotor and both end surfaces of the spring receiver of the case. Therefore, even if the both ends of the spring guide and the both ends of the spring receiver are not aligned at the neutral position due to, for example, dimensional tolerance, the shape of the ends of the torsion coil spring is not defined unlike the conventional line contact structure, Bending can be expected, that is, both ends of the torsion coil spring can be in good elastic contact with both the spring guide of the rotor and the spring receiver of the case. Thereby, according to this invention, the backlash of the rotor and the rotating shaft in the neutral position can be prevented, and a potentiometer excellent in detection accuracy can be obtained in this respect.
  • FIG. 1 is an exploded perspective view of a conventional potentiometer.
  • 2 is a sectional view of the potentiometer shown in FIG. 1 in a stationary state (neutral position).
  • FIG. 3 is a cross-sectional view of the operation state of the potentiometer shown in FIG. 4A is a perspective view showing an embodiment of a potentiometer according to the present invention, and FIG. 4B is a front view thereof.
  • 5A is a cross-sectional view taken along the line CC of FIG. 4B
  • FIG. 5B is a cross-sectional view taken along the line DD of FIG. 4B.
  • 6 is an exploded perspective view of the potentiometer shown in FIG. 4A.
  • FIG. 7 is a view for explaining attachment of the slider to the rotor.
  • FIG. 8A is a sectional view when the rotating shaft is in a neutral position
  • FIG. 8B is a partially enlarged view thereof.
  • FIG. 9A is a cross-sectional view of the state where the rotation shaft is fully rotated counterclockwise
  • FIG. 9B is a cross-sectional view of the state where the rotation shaft is fully rotated clockwise.
  • FIGS. 5A and 5B show the appearance of an embodiment of the potentiometer according to the present invention
  • FIGS. 5A and 5B show the cross-sectional structure thereof.
  • FIG. 6 is an exploded view of each part.
  • the case 20 has a cylindrical base 21, and a rectangular plate portion 22 is formed on the back side of the base 21 so as to protrude from the outer peripheral surface. Largely projecting and formed in a flange shape in opposite directions.
  • a stepped cylindrical portion 24 is formed on the front surface of the base 21 so as to protrude.
  • a bearing 31 is accommodated in the cylindrical portion 24 of the case 20, and a metal sleeve 32 is accommodated in each sleeve hole 23 a of the pair of attachment portions 23.
  • the case 20 and the bearing 31 are each made of synthetic resin. In this example, the bearing 31 and the sleeve 32 are insert-molded in the case 20. Both the case 20 and the bearing 31 are made of synthetic resin, but the case 20 is made of a resin having high rigidity and excellent flame retardancy, and the bearing 31 is made of a resin having excellent wear resistance.
  • the rotor 40 has a plate portion 41 and a pair of spring guides 42 and 43 formed to protrude from one surface of the plate portion 41, and is made of synthetic resin.
  • the pair of spring guides 42 and 43 each have an arc shape in cross section, and these arcs are positioned on the same circumference.
  • the plate portion 41 has a disc shape, and a portion located on the outer peripheral side of one spring guide 43 is cut out.
  • the rotary shaft 33 is made of metal, and an oval portion 33a is formed at one end thereof, and a small-diameter shaft 33b is protruded from the tip surface of the oval portion 33a.
  • the rotary shaft 33 is insert-molded in the plate portion 41 of the rotor 40 and the rotor shaft 40 is integrated with the rotor 40 and positioned at the center of the arc formed by the spring guides 42 and 43.
  • the shaft 33b formed on the front end surface of the oval shaped portion 33a protrudes from the back side of the plate portion 41 of the rotor 40.
  • a slider 34 is attached to the back side of the plate portion 41 of the rotor 40. As shown in FIG. 7, a push nut press-fitting portion 44, a heat caulking portion 45, and a guide portion 46 are formed on the back surface of the plate portion 41 so as to protrude.
  • the slider 34 is made of a metal having spring properties, and has a push nut portion 34a, a caulking hole 34b, and a notch 34c.
  • the push nut portion 34a of the slider 34 is press-fitted into the push nut press-fit portion 44 of the rotor 40, and the heat caulking portion 45 of the rotor 40 is inserted into the caulking hole 34b, thereby performing the heat caulking, whereby the slider 34 is moved to the rotor 40. Attached to and fixed.
  • the guide portion 46 of the rotor 40 and the notch 34c of the slider 34 corresponding to the guide portion 46 function as a guide when the slider 34 is assembled.
  • the torsion coil spring 35 is inserted into the rotary shaft 33 and accommodated in a space in the pair of spring guides 42 and 43 of the rotor 40.
  • the pair of spring guides 42, 43 surround the torsion coil spring 35 along the outer diameter of the torsion coil spring 35, so that the torsion coil spring 35 is held in contact with the pair of spring guides 42, 43.
  • the rotary shaft 33 is inserted into the hole 31a of the bearing 31 which is insert-molded in the case 20, and is pivotally supported.
  • a lip seal 36 is disposed outside the bearing 31 in the cylindrical portion 24 of the case 20, and a washer 37 and an E ring 38 that restrict the movement of the lip seal 36 are disposed.
  • the E-ring 38 is fitted into an E-ring insertion groove 33 c provided on the rotating shaft 33.
  • the front side of the case 20 is sealed with a lip seal 36.
  • a substrate 50 is attached to the back side opening of the base 21 of the case 20.
  • the substrate 50 includes an annular portion 51 and a protruding portion 52 protruding in a square shape from a part of the outer periphery thereof.
  • a pair of arcuate resistor patterns 53, 54 are formed concentrically on the annular portion 51, and are connected to both ends of each of the resistor patterns 53, 54 and protrude through the annular portion 51.
  • Conductor patterns 55 to 57 reaching the tip of the portion 52 are formed.
  • the resistor patterns 53 and 54 are formed, for example, by printing and baking a resin paste mixed with carbon particles, and the conductor patterns 55 to 57 are formed by printing and baking a silver paste.
  • Terminal insertion holes 58 are formed at the tips of the respective conductor patterns 55 to 57 through the substrate 50, and terminals 61 are caulked and attached to these terminal insertion holes 58, respectively.
  • the caulking portion 61a of the terminal 61 is shown as a shape after caulking.
  • the substrate 50 is press-fitted into the base body 21 of the case 20 and is abutted against the abutting portion 21 a provided in the base body 21 to be accommodated. As a result, the slider 34 attached to the rotor 40 is pressed against the resistor patterns 53 and 54. A ring-shaped portion 47 that protrudes from the back side of the plate portion 41 of the rotor 40 so as to surround the shaft 33 b is positioned in the opening 59 of the substrate 50.
  • a cover 62 is further attached to the back side opening of the base 21 of the case 20.
  • the cover 62 is fixed by heat caulking a heat caulking portion 21 b provided in the base 21 of the case 20.
  • a bearing hole 62a for bearing a shaft 33b formed at the tip of the rotary shaft 33 is formed on the inner surface of the cover 62, and the shaft 33b is supported by the bearing hole 62a.
  • an adhesive 63 is applied and filled around the cover 62 attached to the case 20, thereby sealing the back side of the case 20.
  • a space is provided in a portion where the terminal 61 is located inside the case 20, and the periphery of the terminal 61 and the periphery of the caulking portion 61a are filled with the adhesive 63 as shown in FIG. 5B.
  • the terminal 61 is firmly fixed, and migration between the terminals 61 can be prevented.
  • the terminal 61 is made of, for example, carbon steel plated with tin, the growth of tin-plated whiskers can be prevented.
  • Both end portions 35a, 35b of the torsion coil spring 35, both end surfaces 43a, 43b of the spring guide 43, and both end surfaces 25a, 25b of the spring receiver 25 are in contact with each other by point contact.
  • the ends 35a and 35b of the torsion coil spring 35 are point-contacted with the end surfaces 25a and 25b of the spring receiver 25, respectively, between the end portions 35a and 25a, and between the end portions 35b and 25b.
  • a wedge-shaped space that extends toward the center of the rotor 40 is formed between them.
  • the end surfaces 43a and 43b of the spring guide 43 are in point contact with the end portions 35a and 35b of the torsion coil spring 35 at the inner peripheral corners, respectively, and between the end portions 35a and the end surfaces 43a and the end portions 35b.
  • a wedge-shaped space is formed between the end surface 43b and extends toward the outer periphery of the rotor 40.
  • both end surfaces 43a and 43b of the spring guide 43 and both end surfaces 25a and 25b of the spring receiver 25 are in point contact with the both end portions 35a and 35b of the torsion coil spring 35, the torsion coil spring 35 is provided. Both end portions 35a and 35b of the torsion coil spring 35 are easy to bend. Therefore, even if the both end surfaces 43a and 43b of the spring guide 43 and the both end surfaces 25a and 25b of the spring receiver 25 are not aligned in a neutral state due to dimensional tolerances or the like.
  • Both end portions 35a and 35b are bent so that both end portions 35a and 35b of the torsion coil spring 35 are in good elastic contact with both the spring guide 43 and the spring receiver 25 so that the rotor 40 and the rotating shaft 33 are not loose. be able to.
  • both ends 43a and 43b of the spring guide 43 and both ends 25a and 25b of the spring receiver 25 are formed so that a wedge-shaped space is formed between the ends 35a and 35b of the torsion coil spring 35.
  • a required inclination that is, an inclined surface, but may be a curved surface, for example.
  • FIG. 9A and 9B show a state in which the rotating shaft 33 is rotated counterclockwise and clockwise, respectively, and the spring guide 43 of the rotor 40 makes the end portion 35a of the torsion coil spring 35 elastic in FIG. 9A. 9B, the end portion 35b is pressed against its elasticity.
  • the slider 34 slides on the resistor patterns 53 and 54 of the substrate 50, and a desired output signal can be obtained from the terminal 61.
  • the rotational force of the rotating shaft 33 is released, the rotor 40 and the rotating shaft 33 return to the original neutral position shown in FIG. 8A by the elastic restoring force of the torsion coil spring 35.
  • the play of the rotating shaft 33 can be prevented at the neutral position. Further, since the torsion coil spring 35 is held in contact with the pair of spring guides 42 and 43 of the rotor 40, the axis of the spring does not tilt and unexpected deformation does not occur. Rotational performance can be obtained.
  • this potentiometer is used, for example, for detecting the amount of accelerator depression in an electric cart, a scooter, or the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adjustable Resistors (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

La présente invention concerne un potentiomètre. Un substrat (50) sur lequel des motifs de résistance (53, 54) sont formés, un rotor (40) sur lequel un élément coulissant est fixé, et un ressort hélicoïdal de torsion (35) sont logés dans un boîtier (20), et un arbre de rotation (33) qui est inséré à travers ledit ressort (35) et qui est raccordé au rotor (40) dépasse du boîtier (20). Dans ce potentiomètre, le rotor (40) est équipé de deux guides de ressort (42, 43) qui contiennent chacun partiellement le ressort hélicoïdal de torsion à coupe transversale circulaire (35) et qui sont chacun en contact avec celui-ci. La configuration est telle que deux extrémités (35a, 35b) qui s'étendent dans des directions radiales du ressort hélicoïdal de torsion (35) soient en contact élastique, respectivement, avec les deux extrémités circonférentielles (43a, 43b) du guide de ressort (43) et avec deux extrémités circonférentielles d'un sabot à ressort (25) qui sont installées de façon à dépasser de la surface circonférentielle interne du boîtier (20), et telle que les deux extrémités (43a, 43b) du guide de ressort (43) et les deux extrémités (25a, 25b) du sabot à ressort (25) soient en contact ponctuel, respectivement, avec les deux extrémités (35a, 35b) du ressort hélicoïdal de torsion (35). Dans ce potentiomètre équipé d'un mécanisme automatique de retour, il est possible d'éviter le cliquetis de l'arbre de rotation (33) en position neutre.
PCT/JP2010/056826 2009-06-30 2010-04-16 Potentiomètre Ceased WO2011001733A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
HK13103374.5A HK1176115B (en) 2009-06-30 2010-04-16 Potentiometer
CN201080025352.2A CN102803903B (zh) 2009-06-30 2010-04-16 电位计

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-154817 2009-06-30
JP2009154817A JP5166363B2 (ja) 2009-06-30 2009-06-30 ポテンショメータ

Publications (1)

Publication Number Publication Date
WO2011001733A1 true WO2011001733A1 (fr) 2011-01-06

Family

ID=43410817

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/056826 Ceased WO2011001733A1 (fr) 2009-06-30 2010-04-16 Potentiomètre

Country Status (4)

Country Link
JP (1) JP5166363B2 (fr)
CN (1) CN102803903B (fr)
TW (1) TWI470237B (fr)
WO (1) WO2011001733A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018092225A1 (fr) * 2016-11-16 2018-05-24 東京コスモス電機株式会社 Dispositif de commutation pour résistance variable
WO2018092224A1 (fr) * 2016-11-16 2018-05-24 東京コスモス電機株式会社 Dispositif de commutation pour résistance variable
ES2728136A1 (es) * 2018-04-20 2019-10-22 Aragonesa De Componentes Pasivos S A Mando de control retornable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968338A (en) * 1974-08-13 1976-07-06 Cts Corporation Electrical switch control
JP2533523Y2 (ja) * 1991-09-09 1997-04-23 アルプス電気株式会社 回転型電気部品
JPH11339598A (ja) * 1998-05-25 1999-12-10 Alps Electric Co Ltd 複合操作型電気部品

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3141647B2 (ja) * 1993-04-15 2001-03-05 松下電器産業株式会社 回転型電子部品

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968338A (en) * 1974-08-13 1976-07-06 Cts Corporation Electrical switch control
JP2533523Y2 (ja) * 1991-09-09 1997-04-23 アルプス電気株式会社 回転型電気部品
JPH11339598A (ja) * 1998-05-25 1999-12-10 Alps Electric Co Ltd 複合操作型電気部品

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018092225A1 (fr) * 2016-11-16 2018-05-24 東京コスモス電機株式会社 Dispositif de commutation pour résistance variable
WO2018092224A1 (fr) * 2016-11-16 2018-05-24 東京コスモス電機株式会社 Dispositif de commutation pour résistance variable
ES2728136A1 (es) * 2018-04-20 2019-10-22 Aragonesa De Componentes Pasivos S A Mando de control retornable
WO2019202187A1 (fr) * 2018-04-20 2019-10-24 Aragonesa De Componentes Pasivos, S.A. Commande à retour

Also Published As

Publication number Publication date
JP5166363B2 (ja) 2013-03-21
CN102803903B (zh) 2015-09-30
TWI470237B (zh) 2015-01-21
JP2011012978A (ja) 2011-01-20
HK1176115A1 (en) 2013-07-19
TW201109679A (en) 2011-03-16
CN102803903A (zh) 2012-11-28

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