JPH0736177U - Display flap drive - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a thin flap drive device for display with high drive efficiency. [Structure] A support shaft 2 for supporting a display flap 1 and a support shaft 4A for supporting a permanent magnet 4 constituting a driving means 3.
And thinning the magnetic core 5A of the magnetic coil 5 along the display surface M, and extending the magnetic core of the magnetic coil 5 to face the permanent magnet 4 by 180 °. The magnetic circuit of the magnetic coil is closed loop, and the driving efficiency is improved by closing the magnetic circuit.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a display flap drive device that can be used as a display for a digital display timepiece installed on a wall surface of a building, for example.

[0002]

[Prior art]

 FIG. 5 shows the structure of a conventional display flap drive device. Reference numeral 1 in the figure denotes a display flap. A yellow fluorescent paint, for example, is applied to the front surface 1A of the display flap 1, and the back surface is painted black. As shown in FIG. 6, the display flaps 1 are arranged in the shape of a letter, and the surface 1A of the display flap 1 is driven in a posture parallel to the display surface, so that yellow is displayed and the display flap 1 is displayed on the display surface. When the surface 1A of 1 is driven in a vertically intersecting posture, the inside of the device becomes visible and turns black, and numbers, letters, etc. are displayed by the combination of flaps displayed in yellow.

The display flap 1 is rotatably supported by a shaft 2. Reference numeral 3 indicates a forward / reverse rotation driving means. The forward / reverse rotation driving means 3 is composed of a ring-shaped permanent magnet 4 and a magnetic coil 5. The ring-shaped permanent magnet 4 has magnetic poles NS magnetized on the circumferential surface at angular intervals of 90 °, for example, and is rotatably supported by a shaft 4A. The axis 4A is parallel to the axis 2 which supports the display flap 1. The magnetic core of the magnetic coil 5 is arranged in parallel with the shafts 2 and 4A, and the end of the magnetic core is arranged so as to face the peripheral surface of the permanent magnet 4 and one magnetic pole. That is, in the example of the figure, the case where it faces the N pole of the permanent magnet 4 is shown. The magnetic pole N is attracted to the magnetic core and holds the posture of the display flap 1.

By applying an electric current to the magnetic coil 5 to generate the same N pole as facing the N pole of the permanent magnet 4, the permanent magnet 4 rotates 90 °, and the S pole is attracted to the magnetic core this time. . Therefore, after driving, the posture of the display flap 1 is maintained even if no current is applied to the magnetic coil 5. In other words, it suffices to pass a current through the magnetic coil 5 only when the display flap 1 is inverted. Each time the current is supplied, the permanent magnet 4 is driven in the forward and reverse directions.

The forward / reverse rotation driving means 3 and the display flap 1 are connected by a Geneva mechanism 6. The Geneva mechanism 6 is formed by a lever 7 projecting from the rotating shaft of the display flap 1, an elongated hole 8 formed in this lever 7, an arm 9 projecting from the axis of the permanent magnet 4, and a tip of this arm 9. , And a pin 10 engaged with the elongated hole 8. When the permanent magnet 4 is driven in the forward / reverse rotation at an angle of 90 °, the display flap 1 is also rotated through the Geneva mechanism 6 in the angle range of 90 °. By using the Seneva mechanism, even if a rotational moment is applied to the display flap 1 while the magnetic poles N and S of the permanent magnet 4 are attracted to the magnetic core of the magnetic coil 5, the rotational moment is transmitted to the permanent magnet 4. Not done. Therefore, the posture of the display flap 1 does not change due to an external force, and when the permanent magnet 4 starts to rotate, the pin 10 starts to move along the elongated hole 8 so that it can be started with a small load. Is obtained.

[0006]

[Problems to be solved by the device]

 Conventionally, the display flap 1 is rotationally driven by the structure shown in FIG. 5, but the magnetic circuit of the magnetic coil 5 has an open loop structure. For this reason, the efficiency for driving is low, and there is a disadvantage that the display flap 1 must be rotationally driven with a relatively large electric power.

Further, there is also a problem that the depth dimension D from the display surface becomes large because the dimensions of the display flap 1 and the mounting base 5B of the magnetic coil 5 are large. An object of the present invention is to improve a driving efficiency, to drive a display flap with a small amount of electric power, and to provide a display flap drive device which can make a depth from a display surface thin. To do.

[0008]

[Means for Solving the Problems]

 In this invention, a display flap is rotatably supported in a posture in which the plate surface is parallel to the display surface and a posture in which the plate surface is perpendicular to the display surface, and a forward / reverse driving means composed of a magnetic coil and a permanent magnet. It is composed of a Geneva mechanism that transmits the driving force of the forward / reverse rotation driving means to the display flap.Each time the direction of the current applied to the magnetic coil is reversed, the plate surface of the display flap becomes parallel to the display surface. In a display flap drive device that is changed to a vertical position and switched to a display state and a non-display state, a support shaft that supports the display flap, a support shaft that rotatably supports a permanent magnet, and a magnetic coil magnetism. The core is arranged in the direction along the display surface, both ends of the magnetic core of the magnetic coil are extended, and the extended ends are arranged to face the peripheral surface of the permanent magnet by 180 ° to form a driving device.

[0009]

[Action]

 According to the structure of the present invention, the support shaft for supporting the display flap, the support shaft for rotatably supporting the permanent magnet, and the magnetic core of the magnetic coil are arranged along the display surface. The depth dimension from can be reduced. Further, since both ends of the magnetic core of the magnetic coil are extended toward the circumferential surface of the permanent magnet, the extended ends are opposed to each other, and the permanent magnet is arranged between them, the magnetic circuit of the magnetic coil becomes a closed loop. By operating the magnetic circuit in a closed loop, the permanent magnet can be efficiently driven to rotate.

[0010]

【Example】

 FIG. 1 shows an embodiment of this invention. Portions corresponding to those in FIG. 5 are designated by the same reference numerals. In this invention, a support shaft 2 for rotatably supporting a display flap 1, a support shaft 4A for rotatably supporting a permanent magnet 4, and a magnetic core 5A of a magnetic coil 5 are arranged along a display surface M. .

The support shaft 2 is pivotally supported by the side wall of the case 11 as shown in FIG. A support shaft 4A that supports the permanent magnet 4 is pivotally supported by a pair of bearing pieces 12 protruding from the back surface of the case 11. Further, one end of the support shaft 4A penetrates the side wall of the case 11 and is led out to the outside, and a knob 13 (FIG. 2) is attached to the led out end so that the display flap 1 can be manually rotated. The case is shown.

In this invention, both ends of the magnetic core 5A of the magnetic coil 5 are further extended as shown in FIG. Although the extended end of the magnetic core 5A has a linear shape in FIG. 2, the end may be bent toward the permanent magnet 4. 3 is a side view and FIG. 4 is a rear view. As shown in FIG. 4, the display flap 1 is projected longer than the width of the case 11. Therefore, a notch 11A is formed on the side wall surface of the case 11 as shown in FIG. 3, and the display flap 1 is housed in the notch 11A.

When an N pole is generated above the magnetic core 5A and an S pole is generated below the magnetic core 5A in the state shown in FIG. 1, the permanent magnet 4 rotates counterclockwise, and the display flap 1 is inverted to the non-display state. Let In this state, the magnetic pole of the permanent magnet 4 has the S pole on the upper side and the N pole on the lower side. In that state, when the S pole is generated on the upper side and the N pole is generated on the lower side, the permanent magnet 4 is rotated clockwise by 90 °, and the display flap 1 is inverted to the display state. This operation is the same as the conventional one.

[0014]

[Effect of device]

 As described above, according to the present invention, the display flap 1, the shaft 4A supporting the permanent magnet 4, and the magnetic core 5A of the magnetic coil 5 are arranged along the display surface M. The depth dimension D can be reduced. As a result, the overall shape of the display device can be reduced. Further, since the magnetic core 5A of the magnetic coil 5 is extended and is opposed to the permanent magnet 4 by 180 °, the magnetic circuit of the magnetic coil 5 forms a closed loop. As a result, the driving efficiency is improved and it is possible to drive with a small electric power. By the way, in the past, it was driven with a pulse current of 24 V and 300 mA, but with the structure of the present invention, it is possible to reliably perform inversion driving with a pulse current of 12 V and 30 mA.

[Brief description of drawings]

FIG. 1 is a sectional view for explaining a structure of a main part of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side view of a display flap driving device according to the present invention.

FIG. 4 is a rear view of a display flap driving device according to the present invention.

FIG. 5 is a perspective view for explaining a conventional technique.

FIG. 6 is a front view showing a number display device including a display flap.

[Explanation of symbols]

 1 Display Flap 2 Support Shaft 3 Forward / Reverse Rotation Driving Means 4 Permanent Magnet 4A Support Shaft 5 Magnetic Coil 5A Magnetic Core 6 Geneva Mechanism

Claims (1)

[Scope of utility model registration request] 1. A. A display flap rotatably supported in a posture in which the plate surface is parallel to the display surface and a posture in which the plate surface is perpendicular to the display surface, a forward / reverse rotation driving unit including a magnetic coil and a permanent magnet, and a forward / reverse rotation driving unit. And a Geneva mechanism that transmits the driving force of the display flap to the display flap. In a display flap drive device that is converted and is switched to a display and non-display state, B. A support shaft that supports the display flap, a support shaft that rotatably supports the permanent magnet, and a magnetic core of a magnet coil are arranged in a direction along the display surface. Further, a display flap drive device is characterized in that the magnetic core of the magnetic coil is extended and arranged at a position facing the peripheral surface of the permanent magnet to constitute a drive device.