EP0218443A1 - Elément d'affichage rotatif et unité d'affichage utilisant cet élément - Google Patents

Elément d'affichage rotatif et unité d'affichage utilisant cet élément Download PDF

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Publication number
EP0218443A1
EP0218443A1 EP86307478A EP86307478A EP0218443A1 EP 0218443 A1 EP0218443 A1 EP 0218443A1 EP 86307478 A EP86307478 A EP 86307478A EP 86307478 A EP86307478 A EP 86307478A EP 0218443 A1 EP0218443 A1 EP 0218443A1
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EP
European Patent Office
Prior art keywords
magnetic poles
permanent magnet
north
rotor
south
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.)
Withdrawn
Application number
EP86307478A
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German (de)
English (en)
Inventor
Yoshimasa Wakatake
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Individual
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Individual
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Publication of EP0218443A1 publication Critical patent/EP0218443A1/fr
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F11/00—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/375—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the position of the elements being controlled by the application of a magnetic field

Definitions

  • the present invention relates to a rotating display element which is provided with a display surface member having plural, for instance, four display surfaces and is adapted to select a desired one of the display surfaces by rotating the display surface member. Further, the invention pertains to improvement in or relating to a display unit using such a rotating display element.
  • An object of the present invention is to provide a novel rotating display element free from the above-­mentioned defects and a display unit using such a display element.
  • a selected one of the display surfaces of the display surface member can be turned to face front, simply by connecting a power source to a first exciting winding of either one of a rotor and a stator (hereinafter referred to as a stator, for the sake of simplicity) of a motor mechanism through first or second power supply means and a power source to a second exciting winding of the stator through a third or fourth power supply means. Therefore, the display surfaces of the display surface member can selectively be turned to the front through use of a simple arrangement.
  • the selected display surface can be held there because first and second double-pole permanent magnet members of the other of the rotor and stator (hereinafter referred to as the rotor, for the sake of simplicity) of the above-mentioned motor mechanism act on first and second magnetic members of the stator. This saves unnecessary power consumption.
  • the above-mentioned motor mechanism is incorporated in the display surface member, and so a display surface member driving mechanism need not be provided separately of the display element as in the prior art.
  • the rotor of the motor mechanism has first and second double-pole permanent magnet members, each magnetized with north and south magnetic poles.
  • the double-pole permanent magnet members are each formed by a bar- or plate-like member of narrow rectangular cross section in a direction perpendicular to the axis of the rotor and has the north and south magnetic poles at its both free end faces spaced an angular distance of 180° apart around the rotor axis.
  • the bar- or plate-like member is mounted on the rotor shaft, with the center of the former in the above-­mentioned cross section held in agreement with the center of the latter.
  • the display unit of the present invention employs the above-mentioned display element, and means for driving the display element needs only to have first and second power supply means for supplying power to the first and second exciting windings of the display element and third and fourth power supply means for supplying power to the second exciting winding. Therefore, the display element can be driven with a simple arrangement.
  • Fig. 1 conceptually illustrates an embodiment of the display unit employing the rotating display element of the present invention.
  • the display element is provided with the rotating display element (hereinafter referred to simply as a display element, for the sake of brevity) E and a driving device G for driving it.
  • a display element hereinafter referred to simply as a display element, for the sake of brevity
  • G driving device
  • the display element E has a display surface member D and a permanent magnet type motor mechanism ( hereinafter referred to simply as a motor mechanism, for the sake of brevity) identified by Q in Figs. 2 to 4.
  • a motor mechanism hereinafter referred to simply as a motor mechanism, for the sake of brevity
  • the display surface member D is, for instance, tubular in shape and has four display panels H1, H2, H3 and H4 disposed around its axis at equiangular intervals of 90°. On the outer surfaces of the four display panels H1, H2, H3 and H4 are formed display surfaces F1, F2, F3 and F4, respectively.
  • An example of the motor mechanism Q has a rotary shaft 11, on which two double-pole permanent magnet members M1 and M2, each magnetized with north and south magnetic poles are mounted side by side lengthwise thereof.
  • the double-pole permanent magnet members M1 and M2 are each formed by a bar- or plate-like member which is of narrow rectangular cross section in a direction perpendicular to the rotary shaft 11 and magnetized with north and south magnetic poles at its both free end faces spaced an angular distance of 180° apart around the rotary shaft 11.
  • the bar- or plate-­like member is mounted on the rotary shaft 11, with the center of the former in the above-mentioned cross section held in agreement with the center of the latter.
  • the both end faces of the bar- or plate-like member, magnetized with north and south magnetic poles, respectively each form a circular arc with the center at the rotary shaft 11.
  • Such a bar- or plate-like member has a structure which is obtained by cutting a disc or columnar member along a pair of opposed planes equidistant from a plane containing its axis.
  • the north and south poles of the double-pole permanent magnet member M2 are disposed around the rotary shaft 11 at an angular distance ⁇ °(where ⁇ ° has a value represented by 0° ⁇ ⁇ ° ⁇ 180° and including 0°) apart from the north and south magnetic poles of the double-pole permanent magnet members M1.
  • ⁇ ° has a value represented by 0° ⁇ ⁇ ° ⁇ 180° and including 0°
  • the rotary shaft 11 and the double-pole permanent magnet members M1 and M2, mentioned above, constitute a rotor R of the motor mechanism Q.
  • the rotor R of the motor mechanism Q is rotatably supported by a support 15 which is composed of left-hand, right-hand and rear panels 12, 13 and 14. That is, the rotary shaft 11 of the rotor R is pivotally mounted between the left- and right-hand panels 12 and 13 of the support 15.
  • the motor mechanism Q comprises, for example, a magnetic member B1 provided with magnetic poles P1 and P2, which act on the north and south magnetic poles of the double-pole permanent magnet member M1, a magnetic member B2 similarly provided with magnetic poles P3 and P4, which act on the north and south magnetic poles of the double-pole permanent magnet member M2, an exciting winding L1 wound on the magnetic member B1 in a manner to excite the magnetic poles P1 and P2 in reverse polarities, and an exciting winding L2 wound on the magnetic member B2 in a manner to excite the magnetic poles P3 and P4 in reverse polarities.
  • the magnetic poles P1 and P2 of the magnetic member B1 are spaced apart an angular distance of 180° around the axis of the rotor R, i. e. the rotary shaft 11.
  • the magnetic poles P3 and P4 of the magnetic member B2 are also spaced apart an angular distance of 180 around the rotary shaft 11 of the rotor R, but these magnetic poles P3 and P4 are held at an angular distance ⁇ 90° ⁇ ° from the magnetic poles P1 and P2 of the magnetic member B1.
  • ⁇ 0 as mentioned previously and +90° is selected from ⁇ 90°, and so the former magnetic poles P3 and P4 are shown to be spaced +90° apart from those P1 and P2.
  • the magnetic poles P1 and P2 of the magnetic member B1 and the magnetic poles P3 and P4 of the magnetic member B2 respectively extend over an angular range of about 90° around the axis of the rotary shaft 11 of the rotor R.
  • the magnetic members B1 and B2 and the exciting windings L1 and L2 form a stator S of the motor mechanism Q.
  • the stator S of the motor mechanism Q is fixedly mounted on the aforementioned support 15. That is, the magnetic member B1 and the exciting winding L1 wound thereon are fixed to the support 15 by a support rod 16 which extends between the position of the exciting winding L1 and the inner side wall of the right-hand panel 13 of the support 15. Likewise the magnetic member B2 and the exciting winding L2 wound thereon are fixed to the support 15 by a support rod 17 which extends between the position of the exciting winding L2 and the inner side wall of the left-hand panel 12 of the support 15.
  • the display surface member D is mounted on the rotor R in such a manner that the display surface F1 of the display surface member D faces to the front when the rotor R assumes such a rotational position where the centers of the north and south magnetic poles of the double-pole permanent magnet member M1 are opposite to trailing ends a of the magnetic poles P1 and P2 of the magnetic member B1 in the clockwise direction, respectively, and the centers of the north and south magnetic poles of the double-pole permanent magnet member M2 are opposite to leading ends b of the magnetic poles P3 and P4 of the magnetic member B2 in the clockwise direction, respectively, as shown in Figs. 5, 9, 12 and 15.
  • the above rotational position will herein­after be referred to as the first rotational position.
  • the display surface member D is mounted on the rotor R in such a manner that the display surface F4 of the display surface member D faces to the front when the rotor R assumes such a rotational position where the centers of the north and south magnetic poles of the double-pole permanent magnet member M1 confront the leading ends b of the magnetic poles P1 and P2 of the magnetic member B1 in the clockwise direction, respectively, and the centers of the north and south magnetic poles of the double-pole permanent magnet member M2 confront the trailing ends a of the magnetic poles P4 and P3 of the magnetic member B2 in the clockwise direction, respectively, as shown in Figs. 6, 13 and 16.
  • the above rotational position will hereinafter be referred to as the fourth rotational position.
  • the display surface member D is mounted on the rotor R in such a manner that the display surface F2 of the display surface member D faces to the front when the rotor R assumes such a rotational position where the centers of the north and south magnetic poles of the double-pole permanent magnet member M1 are opposite to the leading ends b of the magnetic poles P2 and P1 of the magnetic member B1 in the clockwise direction, respectively, and the centers of the north and south magnetic poles of the double-pole permanent magnet member M2 are opposite to the trailing ends a of the magnetic poles P3 and P4 of the magnetic member B2 in the clockwise direction, respectively, as shown in Figs. 7, 10 and 17.
  • the above rotational position will hereinafter be referred to as the second rotational position.
  • the display surface member D is mounted on the rotor R in such a manner that the display surface F3 of the display surface member D faces to the front when the rotor R assumes such a rotational position where the centers of the north and south magnetic poles of the double-pole permanent magnet member M1 confront the trailing ends a of the magnetic pole portions P2 and P1 of the magnetic member B1 in the clockwise direction, respectively, and the centers of the north and south magnetic poles of the double-pole permanent magnet member M2 confront the leading ends b of the magnetic poles P4 and P3 of the magnetic member B2 in the clockwise direction, respectively, as shown in Figs. 8, 11 and 14.
  • the above rotational position will hereinafter be referred to as the third rotational position.
  • the driving device G is provided with power supply means J1 for supplying power to the exciting winding L1 of the stator S of the motor mechanism Q to make the magnetic poles P1 and P2 of the magnetic member B1 serve as north and south magnetic poles, respectively, power supply means J2 for supplying power to the exciting winding L1 to make the magnetic poles P1 and P2 of the magnetic member B1 serve as south and north magnetic poles, respectively, power supply means J3 for supplying power to the exciting winding L2 of the stator S of the motor mechanism Q to make the magnetic poles P3 and P4 of the magnetic member B2 act as north and south magnetic poles, respectively, and power supply means J4 for supplying power to the exciting winding L2 to make the magnetic poles P3 and P4 of the magnetic member B2 act as south and north magnetic poles, respectively.
  • power supply means J1 for supplying power to the exciting winding L1 of the stator S of the motor mechanism Q to make the magnetic poles P1 and P2 of the magnetic member B1 serve as north and south
  • the power supply means J1 has, for example, an arrangement in which the positive side of a DC power source 20 is connected to one end of the exciting winding L1 via a movable contact c and a fixed contact a of a change-over switch W1 and the negative side of the DC power source 20 is connected directly to the mid point of the exciting winding L1.
  • the power supply means J2 has, for example, an arrangement in which the positive side of the DC power source 20 is connected to the other end of the exciting winding L1 via the movable contact c and another fixed contact b of the change-over switch W1 and the negative side of the DC power source 20 is connected directly to the mid point of the exciting winding L1.
  • the power supply means J4 has, for example, an arrangement in which the positive side of the DC power source 20 is connected to the other end of the exciting winding L2 via the movable contact c and another contact b of the change-over switch W2 and the negative side of the DC power source 20 is connected directly to the mid point of the exciting winding L2.
  • the rotor R of the motor mechanism Q has the two double-pole permanent magnet members M1 and M2 mounted on the rotary shaft 11.
  • the stator S of the motor mechanism Q has the magnetic member B1 provided with the magnetic poles P1 and P2 which are spaced a 180° angular distance apart around the rotary shaft 11 and act on the north and south magnetic poles of the double-pole permanent magnet member M1 and the magnetic member B2 provided with the magnetic poles P3 and P4 which are spaced an angular distance of ⁇ 90° ⁇ ° apart from the magnetic poles P1 and P2 of the double-pole permanent magnet member M1 and disposed at 90° intervals around the rotary shaft 11 and on the north and south magnetic poles of the double-pole permanent magnet member M2.
  • the display element E is in such a state that the display surface F1 of the display surface member D faces to the front (This state will hereinafter be referred to as the first state).
  • the first state of the display element E even if power is supplied via the power supply means J2 to the exciting winding L1 of the stator S of the motor mechanism Q and to the exciting winding L2 via the power supply means J4 for a very short time at about the same time, as shown in Fig. 5, the display element E will be retained in the first state.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with south and north magnetic poles to produce a small counterclockwise rotating torque in the double-pole permanent magnet member M1, urging the rotor R to turn counterclockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with south and north magnetic poles to produce a small clockwise rotating torque in the double-pole permanent magnet member M2, urging the rotor R to turn clockwise. Accordingly, there develops in the rotor R no rotating torque or only a small counterclockwise or clockwise rotating torque.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 remain opposite the magnetic poles P1 and P2 of the magnetic member B1 now magnetized as the south and north magnetic poles; so that there does not develop in the double-pole permanent magnet member M1 a rotating torque which prevents the rotor R from rotating counterclockwise.
  • the north and south magnetic poles of the double-pole permanent magnetic member M2 leave the magnetic poles P3 and P4 of the magnetic member B2 now magnetized as the south and north magnetic poles, there is produced in the double-pole permanent magnet member M2 a rotating torque which prevents counterclockwise rotational movement of the rotor R.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 stay opposite the magnetic poles P3 and P4 of the magnetic member B2 magnetized as the south and north magnetic poles; so that there does not develop in the double-pole permanent magnet member M2 a rotating torque which prevents the rotor R from rotating clockwise.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 leave the magnetic poles P1 and P2 acting as the south and north magnetic poles, there is produced in the double-pole permanent magnet member M1 a rotating torque which prevents the clockwise rotational movement of the rotor R.
  • the display element E remains in the first state even if power is supplied to the exciting windings L1 and L2 via the power supply means J2 and J4 when the display element E is in the first state.
  • the display element E When the display element E is in the first state, if power is supplied via the power supply means J2 to the exciting winding L1 and to the exciting winding L2 via the power supply means J3 for a very short time at about the same time, as shown in Fig. 6, the rotor R of the motor mechanism Q will assume the afore-mentioned fourth rotational position. That is, the display element E is switched to and held in the state in which its display surface F4 faces front (which state will hereinafter be referred to as the fourth state).
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the south and north magnetic poles.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 are opposite the ends a of the magnetic poles P1 and P2, respectively, no rotating torque is produced in the double-pole permanent magnet member M1, or even if produced, it is only a small counterclockwise rotating torque.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the north and south magnetic poles.
  • the rotor R When the rotor R thus turns counterclockwise and if it further rotates in excess of 45° from the first rotational position, the north and south magnetic poles of the double-pole permanent magnet M1 turn into opposing relation to the magnetic poles P1 and P2 of the magnetic member B1 now magnetized with the south and north magnetic poles, and consequently no rotating torque is produced in the double-pole permanent magnet M1, or even if generated, it is only a small clockwise rotating torque.
  • the rotor R When the rotor R thus turns counterclockwise and if it further rotates in excess of 90° from the first rotational position, the north and south magnetic poles of the double-pole permanent magnet M2 turn into opposing relation to the magnetic poles P4 and P3 of the magnetic member B2 now magnetized with the south and north magnetic poles; so that no rotating torque is developed in the double-pole permanent magnet M2, or even if produced, it is only a small counterclockwise rotating torque.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 are out of opposing relation to the magnetic poles P1 and P2 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R from rotating counterclockwise in excess of 90° from the first state. Therefore, the rotor R does not turn counterclockwise in excess of 90° from the first rotational position.
  • the rotor R of the motor mechanism Q will assume the second rotational position, where the display element E is switched to and held in the state in which its display surface F2 faces front (which state will hereinafter be referred to as the second state).
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the south and north magnetic poles.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 are opposite to the ends b of the magnetic poles P3 and P4, no rotating torque is produced in the double-pole permanent magnet member M2 and, even if produced, it is only a small clockwise rotating torque.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the north and south magnetic poles.
  • the rotor R When the rotor R thus turns clockwise and if it further rotates in excess of 45° from the first rotational position, the north and south magnetic poles of the double-pole permanent magnet M2 turn into opposing relation to the magnetic poles P3 and P4 of the magnetic member B2 now magnetized with the south and north magnetic poles, and so no rotating torque is produced in the double-pole permanent magnet M2, or even if generated, it is only a small counterclockwise rotating torque.
  • the rotor R of the motor mechanism Q will assume the third rotational position, where the display element E is switched to and held in the state in which its display surface F3 faces front (which state will hereinafter be referred to as the third state).
  • the power supply to the exciting winding L1 via the power supply means J1 magnetizes the magnetic poles P1 and P2 of the magnetic member B1 with the north and south magnetic poles.
  • the north and magnetic poles of the double-pole permanent magnet M1 lie opposite the ends a of the magnetic poles P1 and P2
  • a large clockwise rotating torque is produced in the double-pole permanent magnet M1 owing to repulsive force between its north magnetic pole and the north-magnetized pole P1 and between its south magnetic pole and the south-­magnetized pole P2.
  • a clockwise rotating torque is produced in the rotor R, turning it counterclockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 will be magnetized with the north and south magnetic poles at that point of time.
  • the north and south magnetic poles of the double-pole permanent magnet M2 lie opposite the magnetic poles P3 and P4, a clockwise rotating torque is generated in the double-pole permanent magnet M2 by virtue of repulsive force between its north magnetic pole and the north-magnetized pole P3 and between its south magnetic pole and the south-magnetized pole P4.
  • the rotor R When the rotor R thus turns clockwise and if it further rotates in excess of 90° from the first state, the north and south magnetic poles of the double-pole permanent magnet M1 turn into opposing relation to the ends b of the magnetic poles P2 and P1 of the magnetic member B1 now magnetized with the south and north magnetic poles, and so no rotating torque is developed in the double-pole permanent magnet M1, or even if produced, it is only a small clockwise rotating torque.
  • the rotor R When the rotor R thus turns clockwise if it further rotates in excess of 180° from the first rotational position, the north and south magnetic poles of the double-pole permanent magnet M2 turn into opposing relation to the magnetic poles P4 and P3 of the magnetic member B2 now magnetized with the south and north magnetic poles, so that no rotating torque is developed in the double-pole permanent magnet M2, or even if produced, it is only a small clockwise rotating torque.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 are out of opposing relation to the magnetic poles P2 and P1 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R from rotating clockwise in excess of 180° from the first state. Therefore, the rotor R does not turn clockwise in excess of 180° from the first rotational position.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J1 and J3 in the state in which the display element E assumes the aforesaid first state, the display element E is switched to and held in the third state.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with south and north magnetic poles to produce a small clockwise rotating torque in the double-pole permanent magnet member M1, urging the rotor R to rotate clockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with north and south magnetic poles to produce a small counterclockwise rotating torque in the double-pole permanent magnet member M2, urging the rotor R to rotate counterclockwise. Accordingly, there develops in the rotor R no rotating torque, or only a small clockwise or counterclockwise rotating torque.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 remain in the opposing relation to the magnetic poles P1 and P2 of the magnetic member B1 now magnetized as the south and north magnetic poles; so that there does not develop in the double-pole permanent magnet member M1 a rotating torque which prevents the rotor R from rotating clockwise.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 turn out of the opposing relation to the magnetic poles P4 and P3 of the magnetic member B2 now magnetized as the south and north magnetic poles, there is produced in the double-pole permanent magnet member M2 a rotating torque which prevents clockwise rotational movement of the rotor R.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 do not turn out of the opposing relation to the magnetic poles P4 and P3 magnetized as the south and north magnetic poles, so that there does not develop in the double-­pole permanent magnet member M2 a rotating torque which prevents the rotor R from rotating counterclockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the south and north magnetic poles,
  • the south and north magnetic poles of the double-pole permanent magnet M2 lie opposite to the ends a of the magnetic poles P3 and P4
  • a large clockwise rotating torque is created in the double-pole permanent magnet M2 owing to repulsive forces between its north magnetic pole and the north-magnetic pole P4 and between its south magnetic pole and the south-­magnetized pole P3.
  • a clockwise rotating torque is produced in the rotor R, turning it clockwise.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 stay out of opposing relation to the magnetic poles P1 and P2 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R from rotating clockwise in excess of 90° from the fourth state. Therefore, the rotor R does not turn clockwise in excess of 90° from the fourth state.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J2 and J4 in the state in which the display element E assumes the fourth state, the display element E is switched to and held in the first state.
  • the power supply to the exciting winding L1 via the power supply means J1 magnetizes the magnetic poles P1 and P2 of the magnetic member B1 with the north and south magnetic poles.
  • the north and south magnetic poles of the double-pole permanent magnet M1 lie opposite the ends b of the magnetic poles P1 and P2
  • a large counterclockwise rotating torque is produced in the double-pole permanent magnet M1 by repulsive forces between its north magnetic pole and the north-­magnetized pole P1 and between its south magnetic pole and the south-magnetized pole P2.
  • a counterclockwise rotating torque occurs in the rotor R, driving the rotor R counterclockwise.
  • the magnetic poles P4 and P3 of the magnetic member B2 will be magnetized with the north and south magnetic poles immediately.
  • the north and south magnetic poles of the double-pole permanent magnet M2 lie in opposing relation to the magnetic poles P4 and P3, generating a counterclockwise rotating torque in the double-pole permanent magnet M2 by virtue of repulsive force between its north magnetic pole and the north-magnetized pole P4 and between its south magnetic pole and the south-magnetized pole P3.
  • the rotor R turns counterclockwise.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 do not face the magnetic poles P2 and P1 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R from rotating counterclockwise in excess of 180° from the first state. Therefore, the rotor R does not turn counterclockwise in excess of 180° from the first rotational position.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the north and south magnetic poles.
  • the south and north magnetic poles of the double-pole permanent magnet member M2 are opposite the ends a of the magnetic poles P3 and P4, no rotating torque is produced in the double-pole permanent magnet member M2, or even if produced, it is only a small counterclockwise rotating torque.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the north and south magnetic poles.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J1 and J3 in the state in which the display element E assumes the fourth state, the display element E is switched to and held in the third state.
  • the rotor R of the motor mechanism lies at the second rotational position where the display element E is in the second state in which the display surface F2 of the display surface member D faces to the front.
  • the display element E will remain in the second state.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the north and south magnetic poles to produce a small clockwise rotating torque in the double-pole permanent magnet member M1, urging the rotor R to rotate clockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the south and north magnetic poles to produce a small counterclockwise rotating torque in the double-pole permanent magnet member M2, urging the rotor R to rotate counterclockwise. Accordingly, there develops in the rotor R no rotating torque, or only a small counterclockwise or clockwise rotating torque.
  • the south and north magnetic poles of the double-pole permanent magnet member M1 remain in the opposing relation to the magnetic poles P1 and P2 of the magnetic member B1 now magnetized with the north and south magnetic poles, so that there does not develop in the double-pole permanent magnet member M1 a rotating torque which prevents the rotor R from rotating clockwise.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 turn out of the opposing relation to the magnetic poles P3 and P4 of the magnetic member B2 now magnetized with the south and north magnetic poles there is produced in the double-­pole permanent magnet member M2 a rotating torque which prevents clockwise rotational movement of the rotor R.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 do not turn out of the opposing relation to the magnetic poles P3 and P4 magnetized with the south and north magnetic poles, so that there does not develop in the double-pole permanent magnet member M2 a rotating torque which prevents the rotor R from rotating counterclockwise.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 get out of the opposing relation to the magnetic poles P2 and P1 magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet member M1 a rotating torque which prevents the counterclockwise rotational movement of the rotor R.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the south and north magnetic poles.
  • the north and south magnetic poles of the double-pole permanent magnet member M2 are opposite the end a of the magnetic poles P3 and P4, no rotating torque is produced in the double-pole permanent magnet member M2, or even if produced, it is only a small counterclockwise rotating torque.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the south and north magnetic poles.
  • the double-pole permanent magnet M2 since the north and south magnetic poles of the double-pole permanent magnet M2 are out of opposing relation to the magnetic poles P3 and P4 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M2 a large rotating torque which prevents the rotor R from rotating counterclockwise in excess of 90° from the second rotational position. Therefore, the rotor R does not turn counterclockwise in excess of 90° from the second rotational position.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the south and north magnetic poles.
  • the south and north and magnetic poles of the double-pole permanent magnet M1 lie opposite to the ends b of the magnetic poles P1 and P2, a large counterclockwise rotating torque is produced in the double-pole permanent magnet M1 by repulsive force between its north magnetic pole and the north-magnetized pole P2 and between its south magnetic pole and the south-magnetized pole P1.
  • a counterclockwise rotating torque is produced in the rotor R, driving the rotor R counterclockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 will be magnetized with the north and magnetic poles immediately.
  • the north and south magnetic poles of the double-pole permanent magnet M2 lie in opposing relation to the magnetic poles P3 and P4, a large counterclockwise rotating torque is generated in the double-pole permanent magnet M2 by virtue of repulsive force between its north magnetic pole and the north magnetized pole P3 and between its south magnetic pole and the south-magnetized pole P4.
  • the rotor R turns counterclockwise.
  • the rotor R When the rotor R thus turns counterclockwise and if it further rotates in excess of 90° from the second rotational position, the north and south magnetic poles of the double-pole permanent magnet M1 turn into opposing relation to the ends a of the magnetic poles P1 and P2 of the magnetic member B1 now magnetized with the south and north magnetic poles, and so no rotating torque is developed in the double-pole permanent magnet M1, or even if produced, it is only a small counterclockwise rotating torque.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 are not opposite the magnetic poles P1 and P2 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R from rotating counterclockwise in excess of 180° from the second state. Therefore, the rotor R does not turn counterclockwise in excess of 180° from the second rotational position.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J2 and J3 in the state in which the display element E assumes the aforesaid second state, the display element E is switched to and held in the fourth state.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the north and south magnetic poles.
  • the south and north magnetic poles of the double-pole permanent magnet member M1 are opposite the ends b of the magnetic poles P1 and P2
  • no rotating torque is produced in the double-pole permanent magnet member M1 and, even if produced, it is only a small clockwise rotating torque.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the north and south magnetic poles.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 turn out of opposing relation to the magnetic poles P2 and P1 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R from rotating clockwise in excess of 90° from the second state. Therefore, the rotor R does not turn clockwise in excess of 90° from the second rotational position.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J1 and J3 in the state in which the display element E assumes the aforesaid second state, the display element E is switched to and held in the third state.
  • the display element E is in the third state in which the display surface F3 of the display surface member D faces of the front.
  • the display element E even if power is supplied via the power supply means J1 to the exciting winding L1 of the stator S of the motor mechanism Q and to the exciting winding L2 via the power supply means J3 for a very short time a little before or after each other, as shown in Fig. 8, the display element E will remain in the third state.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the north and south magnetic poles, to produce a small counterclockwise rotating torque in the double-­pole permanent magnet member M1, urging the rotor R to rotate counterclockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the north and south magnetic poles, to produce a small clockwise rotating torque in the double-pole permanent magnet member M2, urging the rotor R to rotate clockwise.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 turn out of the opposing relation to the magnetic poles P2 and P1 of the magnetic member B1 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet member M1 a rotating torque which prevents clockwise rotational movement of the rotor R.
  • the north and south magnetic poles of the double-pole permanent magnet member M1 do not turn out of the opposing relation to the magnetic poles P2 and P1 magnetized with the south and north magnetic poles, so that there does not develop in the double-pole permanent magnet member M1 a rotating torque which prevents the rotor R from rotating counterclockwise.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the south and north magnetic poles.
  • the south and north magnetic poles of the double-pole permanent magnet M1 lie opposite the ends a of the magnetic poles P1 and P2
  • a large clockwise rotating torque is produced in the double-pole permanent magnet M1 by repulsion between its north magnetic pole and the north-­magnetized pole P2 and repulsion between its south magnetic pole and the south-magnetized pole P1.
  • a clockwise rotating torque is produced in the rotor R, driving rotor R clockwise.
  • the magnetic poles P3 and P4 of the magnetic member B2 will be magnetized with the south and north magnetic poles immediately.
  • the south and north magnetic poles of the double-pole permanent magnet M2 lie in opposing relation to the magnetic poles P3 and P4, a clockwise rotating torque is generated in the double-pole permanent magnet M2 by virtue of repulsion between its north magnetic pole and the north magnetized pole P4 and repulsion between its south magnetic pole and the south-­magnetized pole P3.
  • the rotor R turns clockwise.
  • the double-pole permanent magnet M1 since the north and south magnetic poles of the double-pole permanent magnet M1 turn out of opposing relation to the magnetic poles P1 and P2 now magnetized with the south and north magnetic poles, there is produced in the double-pole permanent magnet M1 a large rotating torque which prevents the rotor R form rotating clockwise in excess of 180° from the third rotational position. Accordingly, the rotor R does not turn clockwise in excess of 180° from the third state.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J2 and J4 in the state in which the display element E assumes the third state, the display element E is switched to and held in the first state.
  • the rotor R of the motor mechanism Q will assume the fourth rotational position, by which the display element E is switched to the fourth state in which its display surface F4 faces front, thereafter being held in that state.
  • the magnetic poles P3 and P4 of the magnetic member B2 are magnetized with the north and south magnetic poles.
  • the south and north magnetic poles of the double-pole permanent magnet member M2 are opposite the ends b of the magnetic poles P3 and P4, no rotating torque is produced in the double-pole permanent magnet member M2, or even if produced, it is only a small clockwise rotating torque.
  • the magnetic poles P1 and P2 of the magnetic member B1 are magnetized with the south and north magnetic poles.
  • the display element E when supplying power to the exciting windings L1 and L2 via the power supply means J1 and J4 in the state in which the display element E assumes the aforesaid third state, the display element E is switched to the held in the second state.
  • the means for selecting a desired one of the display surfaces F1, F2, F3 and F4 of the display surface member D of the display element E is very simple because it is formed by the power supply means J1 and J2 for the exciting winding L1 of the stator S of the motor mechanism Q and the power supply means J3 and J4 for the exciting winding L2 of the stator S.
  • the double-pole permanent magnet members M1 and M2 of the rotor R of the motor mechanism Q are each formed by a bar- or plate-like member which is of narrow rectangular cross section in the direction perpendicular to the axis of the otary shaft 11 and magnetized with north and south magnetic poles at its both free end faces spaced an angular distance of 180° apart around the axis of the rotary shaft 11. Therefore, the effective angular ranges of the north and south magnetic poles of the double-pole permanent magnet members M1 and M2 around the rotary shaft 11 are effectively limited by their bar- or plate-like configurations. Accordingly, a desired one of the display surfaces F1, F2, F3 and F4 of the display element E can be selected rapidly and smoothly, and an error in positioning the selected display surface can be effectively eliminated.
  • the bar- or plate-like members which form the double-pole permanent magnet members M1 and M2 and limit the effective angular ranged of their north and south magnetic poles, are of narrow rectangular cross section and the widths of their end faces are less than 45° around the axis of the rotary shaft 11, these width may be any value so long as they are smaller than 45°, although it is preferable that they are relatively small within the angular range of less than 45°.
  • the rotor R is a so-called inner rotor type
  • the rotor can be formed as an outer rotor type.
  • the rotor may also be substituted with the stator, in which case the latter may be substituted with the former.
  • a panel which has many display elements arranged in a matrix form on a common flat or curved surface
  • a plurality of display surfaces of the many display elements can selectively be directed to the front, making it possible to display letters, symbols, graphic forms, patterns and so forth on the panel. Accordingly, the present invention can be applied, for example, to an advertising panel, a traffic sign board and the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Displays For Variable Information Using Movable Means (AREA)
EP86307478A 1985-10-02 1986-09-30 Elément d'affichage rotatif et unité d'affichage utilisant cet élément Withdrawn EP0218443A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60219803A JPH0736099B2 (ja) 1985-10-02 1985-10-02 回動型表示素子及びこれを使用した表示装置
JP219803/85 1985-10-02

Publications (1)

Publication Number Publication Date
EP0218443A1 true EP0218443A1 (fr) 1987-04-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86307478A Withdrawn EP0218443A1 (fr) 1985-10-02 1986-09-30 Elément d'affichage rotatif et unité d'affichage utilisant cet élément

Country Status (6)

Country Link
EP (1) EP0218443A1 (fr)
JP (1) JPH0736099B2 (fr)
KR (1) KR900002772B1 (fr)
CN (1) CN86106733A (fr)
AU (1) AU595243B2 (fr)
CA (1) CA1286500C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364258A2 (fr) * 1988-10-12 1990-04-18 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant cet élément
GB2235804A (en) * 1989-08-17 1991-03-13 Sam Ik Electronics Ind Co Ltd Matrix display

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465334A (en) * 1968-04-22 1969-09-02 Bendix Corp Rotary electromagnetic indicator device
FR2368172A1 (fr) * 1976-10-15 1978-05-12 Teldix Gmbh Moteur electrique
DE2804169A1 (de) * 1977-02-01 1978-09-21 Fischbach & Moore Magnetische anzeigeeinrichtung
EP0093600A2 (fr) * 1982-04-30 1983-11-09 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant cet élément
EP0122288A1 (fr) * 1982-10-07 1984-10-24 Yoshimasa Wakatake Element d'affichage rotatif et dispositif d'affichage l'utilisant
EP0126543A1 (fr) * 1983-04-15 1984-11-28 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant celui-ci

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465334A (en) * 1968-04-22 1969-09-02 Bendix Corp Rotary electromagnetic indicator device
FR2368172A1 (fr) * 1976-10-15 1978-05-12 Teldix Gmbh Moteur electrique
DE2804169A1 (de) * 1977-02-01 1978-09-21 Fischbach & Moore Magnetische anzeigeeinrichtung
EP0093600A2 (fr) * 1982-04-30 1983-11-09 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant cet élément
EP0122288A1 (fr) * 1982-10-07 1984-10-24 Yoshimasa Wakatake Element d'affichage rotatif et dispositif d'affichage l'utilisant
EP0126543A1 (fr) * 1983-04-15 1984-11-28 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant celui-ci

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0364258A2 (fr) * 1988-10-12 1990-04-18 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant cet élément
EP0364258A3 (fr) * 1988-10-12 1991-06-12 Yoshimasa Wakatake Elément d'affichage rotatif et unité d'affichage utilisant cet élément
GB2235804A (en) * 1989-08-17 1991-03-13 Sam Ik Electronics Ind Co Ltd Matrix display
GB2235804B (en) * 1989-08-17 1994-02-16 Sam Ik Electronics Ind Co Ltd Colour flap apparatus for displaying information

Also Published As

Publication number Publication date
JPS6279495A (ja) 1987-04-11
AU6342486A (en) 1987-04-09
JPH0736099B2 (ja) 1995-04-19
KR870004553A (ko) 1987-05-11
CA1286500C (fr) 1991-07-23
AU595243B2 (en) 1990-03-29
CN86106733A (zh) 1987-04-29
KR900002772B1 (ko) 1990-04-30

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