JPH0612141Y2 - Magnetically actuated lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a magnetically actuated lock device that drives a locking pin by utilizing a magnetic attraction action or a repulsion action.

(Prior Art) A magnet lock pin is housed in an axial receiving hole of a rotor, and the lock pin is prevented from being biased by a spring by magnetic attraction or repulsion between the magnet lock pin and a magnet on the key body side. A magnetically-actuated lock device that unlocks the rotor from the lock body by moving it forward and backward by a predetermined stroke has already been known, and in this lock device, in order to enhance the safety of the lock function and increase the number of key differences. It has been proposed to provide a plurality of lock pins.

(Problems to be solved by the invention) However, in the magnetically actuated lock device of Japanese Utility Model Laid-Open No. 49-90591, the plurality of lock pin receiving holes are simply arranged in a spiral shape, and , Actual Kaisho 49-9
In the magnetically actuated locking device of Japanese Patent No. 5086, the plurality of receiving holes are simply arranged on concentric circles, and in any case, no particular consideration is given to the distance between the receiving holes closest to each other.

Therefore, the degree of magnetic field interference in the magnet lock pins accommodated in the adjacent receiving holes becomes deep, and the magnetic force of the lock pins declines relatively early. The mutual reduction of the magnetic force also occurs in the magnet on the key body side that is embedded corresponding to the lock pin, and shortens the service life of the magnetically actuated lock device.

Therefore, it is an object of the present invention to provide a magnetically actuated locking device that can ensure a long service life because there is no mutual attenuation of the magnetic forces between the magnet lock pins.

(Means for Solving the Problems) The following will describe with reference numerals in the accompanying drawings. The gist of the present invention is to provide an axial receiving hole 2 in a lock body 1 and to receive the receiving hole 2
The rotor 4 is provided with an axial receiving hole 5 corresponding to
The magnetic lock pin 6 housed in the magnet and the magnet 8 on the key body 7 side by magnetic attraction or repulsion to move the lock pin 6 forward or backward against the bias of the spring 9. In a magnetically actuated lock device for unlocking the rotor 4 with respect to the lock body 1, a plurality of receiving holes 2 of the lock body 1 and a plurality of receiving holes 5 of the rotor 4 are provided dispersedly on a plurality of concentric circles, On the same circumference, the receiving holes are arranged at angular intervals that are not equal to the operating angle of the rotor 4 or its multiple angle, and the intervals between the closest receiving holes on adjacent concentric circles are made equal or almost equal. is there.

(Operation) The magnet 8 of the key body 7 is connected to the lock pin 6 made of a predetermined magnet of the rotor 4.
When the key body 7 is brought into contact with the front surface of the rotor 4 in alignment with the magnetic pole on the rear end side of the magnet 8 and the magnetic pole on the front end side of the lock pin 6 as shown in FIG. , The lock pin 6 retreats against the bias of the spring 9 due to the magnetic repulsion action, while the lock pin 6 moves backward as shown in the second from the top of FIG. Magnetic pole and lock pin 6
When the magnetic pole at the front end is different, the lock pin 6 moves forward against the bias of the spring 9 due to the magnetic attraction action, whereby the locking of the rotor 4 with respect to the lock body 1 is released.

Therefore, by rotating the rotor 4 in a predetermined direction by the key body 7 engaged with the rotor 4, the stopper plate 10 fitted and fixed to the rear end of the rotor 4 moves from the locked position to the unlocked position. To do.

(Embodiment) In the illustrated embodiment, as shown in detail by using auxiliary lines in FIG. 4, the receiving holes 2 of the lock body 1 are three concentric circles, three per concentric circle, 12 in total. It is provided. The radius R ₁ of the innermost circle is 5.25 mm, and the radius R of the next largest circle is
₂ is 6.25 mm and the radius R ₃ of the next largest circle is 7.25
mm, the radius R ₄ of the outermost circle is 8.25 mm, and the diameter D of each receiving hole 2 is 2.40 mm.

Although the three receiving holes 2 on the same circumference are arranged at equal angular intervals, that is, at intervals of 120 degrees, among the angles between the receiving holes on the four inner and outer concentric circles shown in FIG. Angle θ ₁ is 25.5
Degree, angle θ ₂ is 27.2 degrees, angle θ ₃ is 32.8 degrees, angle θ ₄ is
It is set to 34.5 degrees. Since the operating angle of the rotor 4 is 90 degrees, when the rotor 4 is rotated between the locked position and the unlocked position, the receiving holes on the same circumference do not overlap each other.

The receiving holes 5 on the rotor 4 side are also provided at the same arrangement intervals as the receiving holes 2 on the lock body 1 side, whereby the intervals between the lock pins 6 that are closest to each other are substantially equal. Key body 7
The receiving holes 11 for accommodating the side magnets 8 are also provided at the same arrangement intervals as the receiving holes 2 and 5. The spring 9 for urging the lock pin forward or backward is constituted by a compression coil spring.

The non-magnetic lock pin 3 is housed in the first receiving hole 2 shown in FIGS. 9 and 10, and the magnetic lock pin 6 housed in the corresponding receiving hole 5 is magnetic. When retreating due to the repulsive action, the non-magnetic lock pin 3 is pushed back by the lock pin 6, and when the rear end surface 6a of the lock pin 6 comes to the same surface position as the rear end surface 4a of the rotor 4, The rear end of the spring fitting small diameter portion of the non-magnetic lock pin 3 contacts the inner bottom surface 2 a of the receiving hole 2.

The lock pin 6 made of magnet housed in the second receiving hole 5 from the top shown in FIGS. 9 and 10 is retracted by the magnetic attraction action so that the rear end face 6a is the same face as the rear end face 4a of the rotor 4. When it comes to the position, the front end of the spring fitting small-diameter portion 6b has the receiving hole 5
Abuts on the inner bottom surface 5a. At this time, the corresponding lock body 1
The non-magnetic lock pin 3 housed in the side receiving hole 2 remains at the initial position.

The lock pin 3 made of magnet housed in the third receiving hole 2 shown in FIGS. 9 and 10 has a length equivalent to the depth of the receiving hole 2, and the front end surface of the lock pin 3 is 3a comes to the rear end surface 4a of the rotor 4. A lock pin 6 made of a magnetic material is housed in the corresponding receiving hole 5 on the rotor 4 side and is biased backward by a spring 9. A non-magnetic substance 12 is embedded in place of the magnet in the corresponding magnet receiving hole 11 of the key body 7.
Therefore, when the non-magnetic material 12 contacts the front surface of the receiving hole 5, the lock pin 3 and the lock pin 6 remain in the initial unlocked state.

On the other hand, when some magnet is brought into contact with the front surface of the third receiving hole 5 from the top, the magnetic lock pin 6 and the magnetic lock pin 3 are moved forward by a magnetic attraction action to lock the lock. Since the pin 6 is inserted into the receiving hole 5 on the rotor 4 side, the rotor 4 is locked to the lock body 1 so as not to rotate. That is,
The combination of the magnetic lock pin 6 and the magnet lock pin 3 constitutes a dummy pin, which is useful for preventing unauthorized unlocking.

The lock pin 6 made of magnet housed in the fourth receiving hole 5 from the top shown in FIGS. 9 and 10 has a length equivalent to the depth of the receiving hole 5, and the rear end surface of the lock pin 6 is 6a is located at the same surface position as the rear end surface 4a of the rotor 4. Corresponding lock body 1
A non-magnetic lock pin 3 is housed in the side receiving hole 2 and is urged forward by a spring 9. A non-magnetic substance 12 is embedded in place of the magnet in the corresponding magnet receiving hole 11 of the key body 7. Therefore, when the non-magnetic material 12 contacts the front surface of the receiving hole 5, the lock pin 3 and the lock pin 6 remain in the initial unlocked state.

On the other hand, when some magnet is brought into contact with the front surface of the fourth receiving hole 5 from the top to cause a magnetic repulsion action, the magnet lock pin 6 and the non-magnetic lock pin 2 retract. Then
Since the lock pin 6 enters the receiving hole 2 on the lock body 1 side,
The rotor 4 is locked so as not to rotate with respect to the lock body 1. That is, the non-magnetic lock pin 2 and the magnet lock pin 6
This combination also forms a dummy pin, which helps prevent unauthorized unlocking.

Further, the fourth receiving hole 2 from the top shown in FIGS. 9 and 10
The rear end of the small-diameter portion 3b of the non-magnetic lock pin 3 housed in the spring fitting portion projects into the through hole 13 in the radial direction of the lock body 1. A concave portion 15 is provided on the outer peripheral surface of the shaft portion 4b of the rotor 4 at a position facing the through hole 13, and the emergency pin 14 has a spring stopper body 16 and a head portion 1 as shown in FIG.
A compression coil spring 17 housed between the shafts 4a urges the rotor 4 in the direction of the shaft 4b.

During normal times, the head 14a of the emergency pin 14 as described above
Since the rear end of the small-diameter portion 3b of the non-magnetic lock pin 3 is engaged with the inner surface of the emergency pin 14, the inner end of the emergency pin 14 is held outside the recess 15 and 14 is in a position where the rotation of the rotor 4 is not blocked.

On the other hand, when the front surface of the rotor 4 is broken by using a drill, the non-magnetic lock pin 3 pushed forward by the spring 9 pushes out the magnet lock pin 6 from the receiving hole 5 of the rotor 4. The small-diameter portion 3b of the non-magnetic lock pin 3 escapes from the through hole 13. Therefore, the released emergency pin 14 is biased by the spring 17 and slides toward the rotor shaft portion 4b, the inner end portion of which is engaged with the recessed portion 15, and the rotor 4 is fixed to the lock body 1. On the other hand, it is locked so that it cannot rotate.
That is, a magnetically actuated locking device that is resistant to drill breakage can be obtained with the above configuration.

In the illustrated embodiment, a rigid frustoconical guard ring 18 is fitted to the front end of the lock body 1 so as to be able to idle,
The lock body 1 inserted into the opening 21 of the panel 20 so as not to rotate.
Is fixed by tightening a panel 20 between the nut 19 and the guard ring 18 which are screwed into the screw cylinder portion 1a.

The front end face 1b of the lock body 1 and the front end face 4c of the rotor 4 are at positions retracted from the front end face 18a of the guard ring 18, and a circular recess 22 is formed. A circular raised portion 7a that fits into the circular recess 22 is formed on the back surface of the plate-shaped key body 7, and an elliptical positioning convex portion 23 is formed at the center of the circular raised portion 7a. ing. The front end surface 4c of the rotor 4 has a positioning recess 2 having the same shape as the projection 23.
4 is provided.

When the convex portion 23 and the concave portion 24 are fitted to each other, the key body 7 abuts the rotor 4 at a regular position, and the rotational force from the key body 7 is transmitted to the rotor 4. An encircling portion 7b is formed at one end of the key body 7, and one end encircling portion 25 of the grip plate 25 is formed on the encircling portion 7b.
Since the pivot 26 passing through a is inserted, the grip plate 25 is foldable on the key body 7.

(Effect of the Invention) As described above, in the magnetically actuated locking device of the present invention, the lock body 1
A plurality of receiving holes 2 and a plurality of receiving holes 5 of the rotor 4 are distributed on a plurality of concentric circles, and each receiving hole is not equal to the operating angle of the rotor 4 or its multiple angle on the same circumference. Since they are arranged at angular intervals, and the intervals between the receiving holes closest to each other on the adjacent concentric circles are made equal or almost the same, there is no magnetic field interference between the lock pins made of magnets housed in the adjacent receiving holes. Also in the magnet 8 on the key body 7 side arranged corresponding to the lock pin 6, it is possible to prevent the magnetic force from being reduced due to the magnetic field interference between the adjacent magnets.

As described above, since the magnetic forces of the magnet lock pin 6 and the key magnet 8 are maintained at a predetermined level for a long period of time, and the magnetic attraction and repulsion are stabilized, the present invention provides a magnetic field with a long service life. The actuated lock device can be easily provided.

[Brief description of drawings]

1 is a front view of a magnetically actuated locking device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG.
FIG. 3 is a sectional view taken along the line BB in FIG. 2, and FIG. 4 is a front view of the lock body of the lock device, showing the arrangement of pin receiving holes. 5 is a rear view of the key body used in the lock device, FIG. 6 is a bottom view of the key body, FIG. 7 is a sectional view taken along the line CC of FIG. 5, and FIG. FIG. 4 is a vertical cross-sectional view of the lock device with which the key plate is in contact. FIG. 9 is a developed sectional view of the lock device showing a manner of housing the lock pin, and FIG. 10 is a developed sectional view of the lock device when the key plate is brought into contact. FIG. 11 is a longitudinal sectional view of the main part of the lock device when the front surface of the rotor is broken. 1 ... Lock body, 1a ... Screw cylinder part of lock body, 1b ... Front end surface of lock body, 2 ... Receiving hole on lock body side, 2a ... Inner bottom surface of receiving hole, 3 ... Lock pin, 3a ... Front end face of lock pin, 3b ... Small diameter part of lock pin, 4 ... Rotor, 4a
...... Rotor rear end face, 4b ...... Rotor shaft, 4c ...
Front end face of rotor, 5 receiving hole on rotor side, 5a inner bottom face of receiving hole, 6 lock pin, 6a rear end face of lock pin, 6b small diameter part of lock pin, 7 ... … Key body, 7
a ... Circular raised part of key body, 7b ... Circular part of key body, 8 ...
... magnet, 9 ... spring for biasing lock pin, 10 ... stop plate, 11 ... receiving hole for accommodating magnet, 12 ... non-magnetic material, 1
3 ... through hole, 14 ... emergency pin, 14a ... emergency pin head, 15 ... recess, 16 ... spring stopper, 17 ...
... Spring for urging emergency pin, 18 ... Guard ring, 1
8a ... Front end face of guard ring, 19 ... Nut, 20
...... Panel, 21 ...... Panel mounting opening, 22 ...... Circular recessed portion, 23 ...... Positioning convex portion, 24 ...... Positioning concave portion, 25 ...... Grip plate, 25 a ...... Grip plate curved portion Two
6 ... Axis for connection

Claims (1)

[Scope of utility model registration request] 1. A lock pin made of a magnet housed in the receiving hole 5 in which an axial receiving hole 2 is provided in a lock body 1, an axial receiving hole 5 is provided in a rotor 4 corresponding to the receiving hole 2. 6 and the magnet 8 on the key body 7 side
In a magnetically actuated lock device for unlocking the lock of the rotor 4 with respect to the lock body 1 by sliding the magnet pin forward or backward against the bias of the spring 9 by magnetic attraction or repulsion between , A plurality of receiving holes 2 of the lock body 1 and a plurality of receiving holes 5 of the rotor 4 are provided dispersedly on a plurality of concentric circles, and each receiving hole is provided with an operating angle of the rotor 4 or its A magnetically-actuated locking device in which the intervals between adjacent receiving holes on adjacent concentric circles are made equal or nearly equal by arranging at angular intervals that are not equal to multiple angles.