JPS6240037Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electromagnetic lock mechanism that is attached to an attachment case, trunk, etc. and is electromagnetically locked.

Conventionally, the main electromagnetic locking mechanism has been to use a solenoid to move the stopper up and down, but this has the disadvantage that the battery quickly runs out due to high power consumption.

The object of the present invention is to propose a power-saving electromagnetic locking mechanism which eliminates the above-mentioned drawbacks, has a simple structure, has good shock resistance, and has good speed of operation.

The feature of this invention is that the iron core recess and the magnetizing rotor are arranged close to each other, and the magnetizing rotor is rotated at a length that energizes the excitation coil only when driving, and the stopping position of the magnetizing rotor is either the north pole or the south pole. is located inside the iron core recess.

The present invention will be explained below with reference to illustrated embodiments. The electromagnetic lock mechanism is shown on both sides of the base plates 10 and 1 in Figures 1 and 2.
1 has a flat C-shaped iron core 1 and two shafts 2 and 3.
The iron core 1 is provided with a bobbin 4 of an exciting coil 4.
a is attached, magnetizing rotors 5, 6 and a cam 7 are coaxially fitted to one shaft 2, and a substantially V-shaped lever 8 is rotatably fitted to the outer periphery of the other shaft 3. has been done.

The end faces of the magnetic poles 1a and 1b at both ends of the iron core 1 are formed into arc-shaped recesses 1c and 1d, and the outer circumferences of the magnetizing rotors 5 and 6 are arranged concentrically with the recesses.

The outer peripheries of the magnetized rotors 5 and 6 are partially magnetized with N and S poles, and the magnetic poles of one magnetized rotor 5 and the other magnetized rotor 6 at the same position are different polarities. It is magnetized so that Furthermore, a contact plate 9 is fixed to the end face of the other magnetized rotor 6, and the other base plate 1 is inserted into the notch 9a of the contact plate.
A perpendicular pin 12 fixed to the inside of the rotor 1 is exposed to restrict the rotation range of the magnetized rotors 5 and 6.

The cam 7 has a cylinder eccentrically provided on the shaft 2, and has a high cam surface 7a and a low cam surface 7b.

The substantially V-shaped lever 8 has a sliding contact portion 8b formed on one arm portion 8a, and a stopper portion 8d bent at the tip of the other arm portion 8c. A spring 14 is wound around the shaft 3 between the spring hanging portion 8e of the lever 8 and the side plate of the casing 13 in which the electromagnetic lock mechanism is housed.
Both ends of the cam surfaces 7a and 7b are latched so that the sliding contact portions 8b are urged into contact with the cam surfaces 7a and 7b. The stopper portion 8d is configured to protrude to the outside from a through hole formed in the upper plate 15 of the housing 13 and to be engaged with and disengaged from a lock lever 16 provided on a cover of a case (not shown) or the like.

The rotational balance of the cam 7 and the contact plate 9 with respect to the irregularities in the outer circumferential direction is supplemented by a structure not shown.

The operation of the electromagnetic lock mechanism configured as described above is such that when the locking state shown in FIG.
The sliding portion 8b of the letter-shaped lever 8 is brought into contact with the stopper portion 8d, and the stopper portion 8d is projected to the outside from the through hole of the upper plate 15. In this state, one magnetic pole 1a of the iron core 1
The magnetic pole of one magnetized rotor 5 facing this magnetic pole is the S pole as shown in FIG. 3, and the shaft 2 of the magnetized rotor 5 is
If the magnetic pole at the symmetrical position passing through is the N pole, then in the locked state, the magnetic force of the S pole of the rotor 5 will cause the magnetic pole 1 of the iron core 1 to
It is self-maintained by being attracted to a.

Next, when the stopper portion 8d is pulled in and released from the lock lever 16 to release the locked state, a positive pulse current is passed through the excitation coil 4. Due to this pulse current, the magnetic pole 1a of the iron core 1 is excited to the S pole, and the S pole of the rotor 5 is repelled.
The N pole is attracted and the rotor 5 is rotated counterclockwise to the state shown in FIG. 4, and the sliding contact portion 8 of the lever 8
b comes into contact with the high cam surface 7a and becomes the state shown in FIG. 5, releasing the locked state. After the energization ends, the rotor 5 is self-retained and stationary with its N pole attracted to the magnetic pole 1a of the iron core 1. ing.

When switching from the unlocked state to the locked state, a negative pulse current is passed through the excitation coil 4. This pulse current causes the iron core 1 to
The magnetic pole 1a of the rotor 5 is excited to the north pole, and the north pole of the rotor 5 is repelled, and the south pole is attracted to the rotor 5.
is rotated clockwise to the locked state shown in FIGS. 2 and 3.

The other magnetized rotor 6 and the other magnetic pole 1b of the iron core 1 are also switched between the locked state and the unlocked state in the same manner as described above.

When the electromagnetic locking mechanism is configured as described above,
Even if the magnetized rotors 5 and 6 receive a shock due to a fall, etc., the magnetized rotors 5 and 6 are attracted to the magnetic poles 1a and 1b of the iron core 1 by their magnetic force and are self-retained. , 1d are close to each other, the magnetic effect is strong and the magnetized rotor is not easily rotated, and the sliding portion 8b of the substantially V-shaped lever 8 is biased by the spring 14 into contact with the cam surface 7a or 7b. Since the stopper part 8d is not protruded or retracted when the lock lever 16 is in the locked state, the stopper part 8d is
is never disconnected.

Since the present invention is constructed as described above, the magnetized rotor is of a simple construction, and even if it receives an impact due to a drop, etc., the magnetized rotor will not rotate due to the self-holding force of the magnetic force, and the
The letter-shaped lever is biased by a spring and does not move, so it has good impact resistance. Switching between the locked and unlocked states is done with a pulse current, so current consumption is low, and the magnetized rotor relies on magnetic force. Since positioning is performed by self-holding force, it is possible to provide an electromagnetic lock mechanism that has excellent practical effects such as no current consumption and power saving.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a plan view of the electromagnetic lock mechanism, Fig. 2 is a side view of the electromagnetic lock mechanism in the locked state, and Fig. 3 is a recess of the iron core magnetic pole and the magnetized rotor. FIG. 4 is an explanatory diagram of the operation of the recessed portion of the iron core magnetic pole and the magnetizing rotor in the unlocked state, and FIG. 5 is a side view of the electromagnetic lock mechanism in the unlocked state. 1... Iron core, 1c, 1d... Recess, 4... Excitation coil, 5, 6... Magnetizing rotor, 7... Cam,
7a...High cam surface, 7b...Low cam surface, 8...
...Roughly V-shaped lever, 8b...Sliding contact part, 8d...
Stopper part, 16... Lock lever.

Claims (1)

[Scope of utility model registration request] an iron core; a coil wound around the iron core and energized to excite the iron core to an N pole or an S pole;
A magnetized rotor disposed facing the recessed portion of the iron core, N and S poles magnetized on a part of the outer periphery of the magnetized rotor, and rotating coaxially and in relation to the magnetized rotor. A rotatable approximately V-shaped cam that has a cam with high and low cam surfaces provided so as to rotate, a sliding portion that slides on the cam on one side, and a stopper portion that engages and disengages the lock lever on the other side. When the iron core is excited to the N pole or the S pole and the pole of the magnetized rotor corresponding to the magnetic pole is attracted and held still, the opposite polarity opposing portion of the magnetized rotor When the sliding contact portion is located inside the recessed portion and contacts a high cam surface of the cam, the stopper portion is retracted and held, and when the sliding contact portion contacts a low cam surface, the stopper portion is protruded. An electromagnetic lock mechanism characterized in that it is held in such a way as to cause the lock to lock.