JPH06249929A - Indicator - Google Patents

Abstract

PURPOSE:To constantly maintain display state without any conduction by rotating a display body by supporting a specific magnetic field for a drive coil and then switching a color display part. CONSTITUTION:When the N pole of a magnet 9 is attracted at a core 3 and a color display part 13 of a display body is maintained at a green display part, pulses conduct only once between terminals 5 to generate N pole at the core 3 if a battery is consumed. voltage drops, and hence a specific voltage is reached. Then, the magnet 9 is subjected to repulsion, a force for attracting the S pole at the opposite side is generated, and then the magnet 9 is rotated by 180 degrees. Even if pulse conduction is stopped, the S pole is attracted by the core 3, thus maintaining the position. In this case, the center of the core 3 is constituted to be shifted relatively slightly for the center of the magnet 9 for smooth rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indicator for displaying the degree of battery consumption mounted on a portable device such as a pager (product pager).

[0002]

2. Description of the Related Art Conventionally, portable devices such as pagers are equipped with indicators such as light emitting diodes and are used for various display functions, for example, for displaying the remaining capacity of a battery. However, in the light emitting diode display,
Even though it consumes a small amount of electricity because it is always energized, the battery life of recent button battery types is affected.

[0003]

Therefore, a display that does not need to be energized at all times, for example, when the battery voltage drops and drops to a voltage that cannot be used as a device, pulse is energized only once to turn the display red, If a new battery is supplied, it is enough to detect the voltage and display a green (or blue) state with only one pulse energization to maintain the state.

The present invention solves the above-mentioned problems with a simple structure, and it is an object of the present invention to provide an indicator capable of maintaining its display state while always deenergizing.

[0005]

According to the present invention, a housing, a drive coil arranged in the housing, an iron core arranged inside the drive coil, and a part of the housing are rotatably arranged. And a color display section arranged on the display body, which is for receiving a magnetic field from the drive coil and has at least N and S magnetic poles, and supports the predetermined magnetic field on the drive coil. By doing so, the display body is rotated to switch the color display section.

As a desirable structure, it is preferable that the iron core is led out to the outside to be used as a part of the terminal or a single color display portion is used to display in two directions.

[0007]

When a display body equipped with a magnet receives a magnetic field from the drive coil, for example, if an N pole is generated at the end of the iron core of the drive coil facing the magnet, the magnet surface facing this is the N pole. When it becomes, it repels and pulls the south pole on the opposite side and makes a half rotation. The S pole of the magnet remains attracted to the iron core even when the power is turned off.
That state will be maintained.

If the iron core is led out to a part of the end portion, the number of parts can be reduced, and the single color display portion can be displayed in two directions. It will be flexible.

[0009]

1 is a sectional view of an essential part of an indicator of the present invention, in which 1 is a base with a bobbin, and an iron core 3 made of tin or the like is integrally molded on the bobbin part 2. It is led out to serve as a part of the terminal 5. A drive coil 6 is wound around the bobbin portion 2 and is connected to the terminal 5 through a lead lead-out groove 8 arranged in a terminal 7 base portion 4 of the drive coil 6.

At the tip of the bobbin portion 2, two cylindrical N and S
An arm 2 in which a display body composed of a magnet 9 magnetized to a pole protrudes from the tip of the bobbin 2 to both ends via a shaft 10
It is rotatably arranged in V-grooves 2b and 2b in a and 2a.

Reference numeral 11 denotes a cover for accommodating these, which is covered with the bobbin-equipped base 1 and then locked by a locking portion 11a, and constitutes a housing together with the bobbin-equipped base 1. The cover 11 is provided with a window 12 through which the upper and side directions can be seen. The window need not be provided as long as the cover 11 itself is made of transparent resin such as acrylic. Furthermore, this cover 1
Needless to say, 1 is provided with shaft pressing portions 11a arranged at both ends inside, and when the cover 11 is put on the bobbin-equipped base 1, the shaft 10 is set to be freely rotatable.

The display side of the magnet 9 is preferably made of a plastic magnet and integrally molded with the shaft 10, and a color display portion 13 of red and green is printed on the outer circumference of the cylinder. The ground color of the magnet made of black instead of red may be displayed as it is.

FIG. 2 shows a second embodiment of the indicator according to the present invention, in which the housing is constituted by the bobbin-equipped base 1 itself without the cover 11. The terminals are three terminals 5,
5a and 5b, 5 of which are common terminals that are integrated with the above-mentioned iron core 3, and are terminals for N pole 5a and terminals for S pole 5
It is connected together with b as shown by the imaginary line, and after being integrally formed with the bobbin-attached base, the connecting portion is separated. The indicator 9 composed of the magnet 9 is formed into a keyhole-shaped bearing 2c, 2c arranged on the arm 2a, 2a at the tip of the bobbin 2 via the shaft 10.
It is loosely fitted in the.

Next, the operation of these indicators will be described. When the N pole of the magnet is attracted to the iron core 3 and the color display portion of the display body is maintained at the green display portion,
When the battery is exhausted and the voltage drops, when the voltage reaches a predetermined value, the pulse current is applied between the terminals 5a and 5 only once to generate the N pole in the iron core 3.
Repels, and a force attracting the S pole on the opposite side is generated, and the magnet 9 rotates 180 °. Even if the pulse energization is stopped,
The south pole is attracted to the iron core 3 and maintains its position.

At this time, if the center of the iron core 3 is slightly deviated from the center of the magnet 9, the core 3 will rotate smoothly.

If the display body is not eccentric, the center of gravity is coincident with the center, and even if a shock such as a drop is applied, the display body does not rotate unless external force is applied because of the force attracted to the iron core 3. It is convenient.

Next, when the battery is replaced and replaced with a new one, an increase in voltage is detected, and a pulse current is passed between the S pole terminal 5b and the terminal 5 only once to generate an S pole on the iron core 3. If so, the magnet 9 similarly rotates 180 ° and switches to green display. Even if the energization is stopped, the N pole of the magnet 9 is attracted to the iron core 3 and maintained in the display state.

In the above embodiment, the three terminals, that is, the two driving coils are shown. However, the common terminal 5 and either one of the terminals are of the two terminal type, and a single driving coil directs the current. It may have a different configuration.

[0019]

Since the indicator of the present invention is configured as described above, the display can be switched only by energizing the pulse for several ms to several tens of ms, and the display state can be maintained without energizing, so that the battery is consumed. It can contribute to the battery life little and can withstand shock such as dropping. Moreover, since the structure is simple and a height of about 3 mm can be easily realized, it is suitable for use in a card type portable device.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a first embodiment of an indicator of the present invention.

FIG. 2 is a perspective view of the second embodiment of the present invention.

[Explanation of symbols]

 1 base with bobbin 2 bobbin part 3 iron core 4 base part 5 terminal 6 drive coil 9 magnet display 10 shaft 11 cover 12 window 13 color display

Claims (3)

[Claims] 1. A housing, a drive coil arranged in the housing, an iron core arranged inward of the drive coil, and a rotation part arranged in a part of the housing to receive a magnetic field from the drive coil. At least N,
An indicator comprising a display body made of a magnet having an S magnetic pole and a color display section arranged on the display body. 2. The indicator according to claim 1, wherein the iron core is led out to the outside to be a part of the terminal. 3. The indicator according to claim 1, wherein a single color display section is used to display in two directions.