JPS5932111A - Electromagnet apparatus with lock mechanism - Google Patents

Abstract

PURPOSE:To attract alternately the magnets in both ends in accordance with power feeding direction by boring a through hole at the center of iron core having a winding at the circumference, attaching magnets in both ends by inserting a shift longer than the iron core and by providing the members for locking magnets and restoring them. CONSTITUTION:A coil 2 is wound around the hollow iron core 1 having the flange which becomes the bobbin and a shaft 5 which is a little longer than the iron core 1 is inserted into the hollow part of iron core 1. A front magnet plate 3 is attached to the one end of shaft 5, a rear magnet plate 4 is attached to the other end thereof, and the cutaway part 12 is provided in the periphery of flange opposing to the magnet 3 so that the lock restoring magnet 7 can move therethrough. Moreover, a lock metal 6 of which one end is fixed by adequate means is fixed to the magnet 3, while the restoring magnet 7 is attached to the bending part. With such structure, the polarity of battery 8 which is connected to the winding 2 is changed and the lock member 6 and restoring member 7 are operated, causing the magnets 3 and 4 to be attracted alternately to the iron core 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnet device including a locking mechanism for locking the operating state of an electromagnet.

Generally, an electromagnet maintains its operating state while energized, but returns to normal when the energization is stopped. However, maintaining a constant operation using the 'C1 electromagnet consumes a lot of power, which is uneconomical.

The present invention aims to provide an electromagnetic device with a locking mechanism that, once energized to operate the electromagnet, maintains its operating state by means of a locking mechanism even when the energization is stopped, and the lock can be easily released. .

6. The feature of the present invention is that locking or unlocking is performed depending on the direction of the applied current. The present invention will be specifically described below with reference to illustrated embodiments.

FIG. 1 is a schematic cross-sectional view showing a basic embodiment of the present invention. FIG. 1A shows the state before locking, and FIG. 1B shows the locked state. In the figure, (1) is a hollow core that serves as a winding frame for winding (2) and has a through hole (11). (3) is a disk-shaped front magnet that is magnetized in the thickness direction (horizontal direction in the figure);
) is also magnetized in the thickness direction using a disc-shaped rear magnet, but the direction of magnetization is opposite to (3). Both magnets (3) and (
For 4), a disk shape is possible, but it is not necessarily limited to this. (5) is a shaft that quickly connects both magnets (3) and (4), (6) is a locking metal fitting, and (7) is a lock release magnet fixed to the locking metal fitting (6). 6) is fixed at one end to the iron core (1) by a suitable means (not shown), and the other end is bent into a shape that can easily engage the edge of the front magnet (3), for example, in a figure 7 shape. In the figure, the lock fitting (6
) are shown, but three or more may be used. The unlocking magnets (7) are magnetized in directions perpendicular to the shaft (5) and opposite to each other. (8) is a DC power source, such as a battery, for supplying electricity to the winding (2).

Now, when the battery (8) is connected in the polarity direction shown in Figure 1A, the iron core (1) is assumed to be magnetized as shown in the figure, and both magnets (3) and (4) are attached. If the magnetic polarity is as shown in the figure, the front magnet (3) is attracted to the iron core (1), and the rear magnet (4) is repelled from the iron core (1).At this time, the lock release magnet If the magnetization polarity of (7) is set as shown in the figure, the unlocking magnet (7) will be attached to the iron core (1).
), and the lock fitting (6) moves away from the iron core (1), so the front magnet (3) is attracted to the iron core (sleeve) without being hindered by the lock fitting (6). Even if you cut it, the S pole of the front magnet (3) and the unlocking magnet (
Since the N pole of 7) attracts each other, and the lock fitting (6) also elastically presses the front magnet (3), this state is maintained as long as no strong external force is applied. This state is not locked, but the state before locking.Next, the first
As shown in Figure B, the battery (8
'), the iron core (1) is magnetized in the opposite direction to that shown in FIG. 1A. As a result, the iron core (1) attracts the rear magnet (4) and repels the front magnet (3). In other words, the front magnet (
3) moves forward by a certain distance. Attach the rear magnet (
4) is adsorbed, the lock fitting (6) is exactly aligned with the iron core (
The dimensions and positional relationship are set so that it falls between 1) and the front magnet (3). Then, the lock fitting (6)
falls between the iron core (1) and the front magnet (3) due to its own elasticity, and the near-bend portion of the locking fitting (6) touches the front magnet (3).
It engages with the edge of the holder and becomes locked. It should be noted that the unlocking magnet (7) is also attracted to the iron core (1) while energized and helps the lock fitting (6) to fit. In the figure, a notch (12) is provided in the iron core (1) to receive the unlocking magnet (7), but this is not necessarily necessary. To release the locked state, reverse the polarity direction of the battery again as shown in (8), and as explained in Figure 1A, the unlocking magnet (7) will release the polarity before locking. state.

FIG. 2 is a schematic cross-sectional view showing a second embodiment of the invention.

In the figure, parts corresponding to those in FIG. 1 are designated by the same or similar symbols. In this example, in addition to one set of lock fittings (6), another set of lock fittings (6) is provided.

In this example, a switch (9) is used to switch between batteries (8) and (8') having opposite polarity directions. Switch (9)
In the position shown, the rear magnet (4) is retracted and locked in that position, while in the opposite device the front magnet (3) is advanced and locked in that position.

In a polar electromagnetic device having a locking mechanism as described above,
By attaching objects to one or both of the front or rear magnets, or to the extension of the connecting shaft (5), which are to be held in position by moving forward or backward, they can be used for a variety of purposes, such as writing instruments, logettes, etc. It can be used for. Third
and FIG. 4 show a specific example in which the present invention is applied to a writing instrument such as a pen, FIG. 3 is a configuration diagram thereof, and FIG. 4 is an external diagram thereof. In this example, one battery (8) is used and its polarity direction is switched by touch electrodes αY and θQ. In the figure, QO is a pen cartridge (or pen), α■ is a pen cartridge (or pen)
The holder (b) is a connecting fitting that is attached to an extension of the connecting shaft (5) and connects the pen cartridge (or pen) holder α force and the front magnet (3).

Two conductive pieces (
131) and (131) are fixed. (132),
(132) is a fixed contact that comes into contact with the conductive piece (131), (1:h) and moves away when the conductive piece (1:h) moves.
131) and the fixed contact (132) constitute a polarity changeover switch <11. αyu and αυ are touch electrodes that short-circuit and close the circuit when touched by a human finger.
As shown in the figure, it is formed into a ring shape and is placed at the place where the finger grips. 00 is the protection resistance in case of short circuit, αF, αSand are the pen advance operation circuit l/transistor, αI, (23) is the backlash (back electromotive force) side diode, (C), QO is the pen backward operation. Circuit transistor, (company) is bias resistor, (2
4) is a capacitor connected in parallel to the battery (8). Each of these parts can be miniaturized and stored inside the writing instrument.

The figure shows a state in which a finger touches the touch electrode a→, αQ for writing. In this case, the voltage across the capacitor (2) is applied to the pen advance operation circuit transistor α (1e) through the winding (2) and the touch electrode C14 (Xi) as well as the polarity changeover switch α as described below. The electromagnetic device with the locking mechanism is in the same state as shown in Figure 1B.In the state shown in the figure, no current flows through the winding (2), but the pen cartridge αQ is in the locked state as described above. is fixed in the forward position), and writing is possible.To stop writing, touch the electrode α→,0
When released from 0, the transistor ct that was on until then
'f), o→ is off, pen retraction target transistor (a), (2υ is on. At that time, winding (2)
The direction of the current flowing through is as shown by the solid arrow in the figure, and the electromagnet device with the long mechanism is in the same state as in Figure 1A. In other words, the front magnet (3) is connected to the connecting metal fitting (0 years old and the pen car), the IJ Tsuji (11 moves backward, and the conductive piece (1)
31) and (Ih) are also moved to the right side from the position shown in the figure. Then, the power supply voltage that had been applied to the transistor wire (00) is cut off, so these are turned off and the current flowing through the winding (2) is also cut off.

In this state, touch electrode α→ with your finger to write again.

When 0 is touched, the voltage across the capacitor (24) is applied to the pen advance operation circuit transistor α7)tθ, turning it on, as described above. At this time, a current flows through the winding (2) in the direction of the dotted arrow in the diagram, and the winding (2) is brought out of the winding in the same state as in FIG. 1B. Therefore, the pen cartridge αQ moves forward and is locked, but at the same time the conductive piece (131).

(1:h) moves to the left (position shown in the figure) and cuts off the current in winding (2). However, a voltage is applied to the transistors α and Ct through the resistors (2), and they continue to be in the on state.Now, when you remove your finger from the touch electrode a→(IQ), as mentioned above, The pen cartridge θ0 is automatically retracted and stored in the writing instrument, and the current is also cut off.However, in the above operation, the current flowing through the winding (2) is suddenly cut off, so there is a possibility that a large adverse reaction will occur. There is no risk of electromotive force being generated and destroying the transistor, so a bypass diode θ field (c) is provided.

As described above, according to the present invention, it is possible to obtain a polarized electromagnet device which, once the electromagnet is operated by applying electricity in a predetermined direction, can maintain its operating state by a locking mechanism even if the electricity is turned off. The lock can also be easily released by energizing in the opposite direction. It is also possible to reverse the current connection to the windings simultaneously with activation of the locking mechanism, and release the lock by re-energizing in the same direction.

Furthermore, in accordance with the above application example, the electromagnet can be operated to lock the electromagnet by turning on a switch, and the lock can be released by turning off the switch. Therefore, the present invention is an economical electromagnetic device with a simple configuration and low power consumption, and has the potential to be used in many fields.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing a basic embodiment of the present invention, FIG. 2 is a schematic cross-sectional view showing a second embodiment of the present invention, FIG. 3 is a configuration diagram showing an applied example of the present invention, and FIG. The figure shows its external appearance. (3)...Front magnet, (4)...Rear magnet, (5)
... Shaft, (1) ... Iron core, (2) ... Winding wire, (6) ... Lock fitting, (7) ... Lock release magnet. ◇・ Agent Ito

Claims (1)

[Claims] a front magnet, a rear magnet, a shaft connecting the two magnets, an iron core having a hole passing through the shaft, a winding wound around the iron core, one end of which is fixed to the iron core, and the other end of which is fixed to the iron core. a plurality of locking fittings that engage with the front magnet or both magnets;
and a lock release magnet fixed to the lock fitting,
Both magnets are magnetized parallel to the shaft and in opposite directions, and the unlocking magnet is magnetized perpendicular to the shaft and in opposite directions to direct the direction of temporary current to the winding. An electromagnetic device with a locking mechanism, characterized in that the locking mechanism is locked and released by changing the locking fitting.