JP2832474B2 - Electric locking and unlocking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric locking / unlocking device, and more particularly to an improvement of a surface-mounted electric locking / unlocking device.

[Prior Art] This type of surface-locked electric locking / unlocking device connects a surface-locking housing attached to an entrance or the like and an electric lock operation panel provided indoors by wiring, and performs a locking operation of the electric operation panel. Locking or unlocking can be performed by moving the dead bolt of the surface lock housing in and out in accordance with the operation of the switch or the unlocking operation switch and engaging and disengaging from the strike side.

FIG. 5 is a front view of a lock housing 100 of such a surface-mounted electric locking / unlocking device, and FIG. 5A is a longitudinal sectional view thereof.

As shown in these figures, a rotary solenoid constituting an actuator for moving the dead bolt 103 left and right is provided in the cover 101 of the surface lock housing 100.
102 and a lock state detection switch 10 that operates according to the advance / retreat position of the dead bolt 103 to detect the locked or unlocked state.
4 are built-in. Here, the rotary solenoid 102
Is a coil 10 on top of a yoke 102b made of a laminated iron core, etc.
Gap of electromagnet constructed by winding 2a (not shown)
A rotor (not shown) is arranged, and the rotor is alternately reversely rotated by reversing the polarity of the current supplied to the coil 102a, so that the engagement arm 102d fixed to the drive shaft 102c of the rotor is provided. , The dead bolt 103 is protruded and retracted from the side end (left end in the figure) of the lock housing 100 to be engaged and disengaged from the strike (not shown), thereby enabling locking and unlocking.

Further, in such a lock housing 100, when the dead bolt 103 sinks into the lock housing 100 and releases the engagement with the strike, the detection lever 104d of the lock state detection switch 104 moves the lower surface of the dead bolt 103. When the dead bolt 103 protrudes from the left end of the lock housing 101 and engages with the strike to be in a locked state, the detection lever 104d is depressed or unlocked. The operation of the detection lever 104d detects the position of the dead bolt 103 by detecting the position of the dead bolt 103, and detects the locked / unlocked state, and can simultaneously perform switching setting of the energization circuit and interruption of energization. In addition, the concave portion 103b provided in the dead bolt 103 functions to fit an engagement arm 102d fixed to the rotating shaft 102c of the rotor to exchange the rotational motion of the rotor into a linear motion,
This is provided to prevent the rotor from rotating and unlocking the projection of the dead bolt 103 even when a force is applied in the pushing direction when the projection 3 projects from the lock housing 100. Reference numeral 105 denotes a thumb turn attached to the rotating shaft 102c of the rotor, which is used when the dead bolt 103 is manually applied and unlocked.

Reference numerals 104a to 104c denote connection terminals of the lock state detection switch 104.

FIG. 6 shows a schematic circuit configuration of an electric locking / unlocking device when such a surface lock lock housing 100 is connected to an electric lock operation panel 200.

The operation will be described with reference to the circuit diagram of FIG. 6, the time chart of each part of FIGS. 7 (a) to (d), and the operation state explanatory diagrams of the deadbolt and the detection switch of FIGS. 8 (a) to (c). To explain, when the dead bolt 103 protrudes from the lock housing 100 and is in the locked state, when the unlock operation switch of the electric operation panel is operated (not shown), the interlocking contacts S1 and S1 are simultaneously closed, so that the solenoid SOL , A voltage having a positive polarity above the solenoid SOL is applied from the power supply E via the diode D1 and the contact point 104d of the lock state detection switch 104.

As a result, the rotor starts rotating and the dead bolt 103 moves, so that the detection lever 104 of the lock state detection switch 104
d is pushed down, and the common terminals c and b are closed. Then, the locking lamp is turned off and the unlocking lamp is turned on. At this time, the current to the solenoid SOL is automatically cut off by the diode D2, but the rotor rotates due to ellipticity, so the dead bolt 103 moves to the unlocking position. Will do.

When the lock switch (not shown) of the electric lock operation panel is operated after the dead bolt 103 is retracted from the lock housing 100 to reach the unlocked state in this way, the contacts S2 and S2 are simultaneously closed. . Then, the voltage having the lower side as the positive electrode is applied from the power supply E to the solenoid SOL, and the contact 104 of the lock state detection switch 104
d and via diode D2, which results in the rotor starting to rotate in the opposite direction and moving dead bolt 103 to the locking side. Then, when the pressing down of the detection lever 104d by the dead bolt 103 is unlocked, the common terminal c and the terminal a are closed, the unlocking lamp is turned off, and the locking lamp is turned on. At the same time, the current to the solenoid SOL is automatically cut off by the diode D1, but the rotor rotates by inertia to move the dead bolt 103 to the locked state.

However, in the electric locking device having such a configuration, when the unlocking operation is performed from the time when the dead bolt is in the locking position, the projection 103a of the dead bolt 103 is passed when a short time ΔT elapses after the start of energization. Application status detection switch 1
Since the detection lever 104da of 04 is depressed, the common terminal c and the terminal b of the lock state detection switch 104 are closed, the power supply to the solenoid SOL is cut off, and the unlock lamp is turned on.

Therefore, if the dead bolt 103 is stopped by receiving a side pressure from a strike (not shown) provided on the door frame side after operating the unlocking switch, the dead bolt 103 is unlocked even though it is not actually unlocked. The lock lamp lights up. Also, at this time, the contact 104d of the lock state detection switch 104 returns the energizing circuit to the setting state of the locking operation, so that even if the unlocking operation switch is operated, the dead hold does not operate, and if the locking operation switch is operated, There was a problem of returning to the original locked state again. Further, in such a locking and unlocking device, if the detection switch is provided so that the position of the detection lever is in the opposite direction, a similar problem occurs when the lock is moved from the unlocked state to the locked state. .

In such a locking / unlocking device, a locking / unlocking switch is constituted by a single operation button, and each time the operation button is operated, an energization circuit for locking / unlocking is automatically switched, and a dead / dead circuit is provided. There is a configuration in which the locking lamp is lit when the lock state detection switch is switched due to the advancing / retracting operation of the bolt, and the unlocking lamp is lit when the switching is restored.However, the dead bolt is switched during the transition from the locked state to the unlocked state. When the sensor stops due to the side pressure of the strike, the unlock lamp lights up after the detection switch is switched, and the energizing circuit is set to the unlock side,
At this time, there is still a problem that the dead bolt moves to the locking side even when the operation switch is operated.

[Problem to be Solved by the Invention] The present invention proposed to solve the above-described problem is to shut off the energizing circuit and switch the energizing polarity inversion even when the deadbolt stops during operation. It is an object of the present invention to provide an electric locking / unlocking device that continuously performs locking and unlocking operations without such a problem.

[Means for Solving the Problems] To achieve the above object, the present invention proposes a driving unit that advances and retreats a deadbolt for locking and unlocking,
A driving power supply to be supplied to the driving unit, a locking / unlocking switch connected to the driving power supply and inverting a current supply polarity supplied to the driving unit by an alternative operation, and a contact of the locking / unlocking operation switch And a pair of diodes connected in anti-parallel to supply the power supplied from the driving source to the driving unit, and connected to each of these diodes to respond to the advance / retreat operation of the deadbolt. Further, in order to switch and form an energizing circuit from the drive power source to the drive unit, a pair of locking and unlocking detection switches for alternately opening and closing the contacts are provided.

Further, in the present invention described in claim 2, the one set of locking and unlocking detection switches is constituted by micro switches each having a detection lever inclined and protruded, and each detection lever is in a direction opposite to each other. So that it is juxtaposed to the dead boat.

[Operation] According to the present invention as set forth in claims 1 and 2, even if one of a set of switches is switched off by the movement of the deadbolt and the energization is interrupted, the other switch is formed. Therefore, even if the deadbolt is stopped halfway after the switching operation of the switch, the operation is not disabled, and the polarity of the energization is reversed so that an erroneous operation is not performed.

Embodiment An embodiment will be described below with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional structural view of a lock housing constituting a main part of the electric locking / unlocking device of the present invention, and FIG. 1A is a transverse sectional structural view.

As shown in these drawings, the point that a rotary solenoid is used as a drive unit for the dead bolt is the same as the above-described conventional example, and the dead bolt is locked by reversing the polarity of the power supply for supplying power to the drive unit. The basic operation of locking and unlocking by further moving forward and backward is the same as that described above.

Each part will be described based on reference numerals. 1 is a dead bolt, 2 is a case of a lock housing, 3 is a rotary solenoid in which a rotor (not shown) is arranged in a gap of a yoke 32 around which a coil 33 is wound, 4 Is the thumb turn for manual operation, and 5 is the base of the lock housing.

A stopper 13 is formed on one end of the dead bolt 1, and the other 12 is engaged and disengaged by a strike (not shown) to lock and unlock the dead bolt 1. 11 is formed, and is brought into contact with the detection levers Sa, Sb of a set of switches SWa, SWb disposed below the convex portion 11. Reference numeral 21 denotes a screw insertion hole for attaching the case 2 of the lock housing A to a door or the like.

An operating arm 34 is projected and fixed to the rotary shaft 31 of the rotor of the rotary solenoid 3, and this arm 34 is engaged with a recess 10 formed at the upper center of the dead bolt 1. Here, the recess 10 is formed with three semicircular recesses 10a to 10c to define the position of the operating arm 34 accompanying the rotation of the rotor, thereby ensuring the advance / retreat operation of the dead bolt 1, and The dead bolt 1 is prevented from easily sinking into the housing 1 by pressurizing in the pushing direction.

A structural feature of the present invention is to provide two detection switches for detecting the advance / retreat position of the deadbolt to complement the above-described disadvantages of the power shutoff and the conduction polarity reversal that occur during one of the locking and unlocking operations. It is in the point.

In the embodiment shown in FIGS. 1 and 1A, the dead bolt 1
Detector switches SWa and SWb each composed of a set of microswitches are provided below the convex portion 11 of the sensor.
The detection levers Sa and Sb, which are more inclined and protruded, are arranged in parallel in opposite directions so as to cross each other. When the dead bolt 1 moves forward and backward, the protrusion 11 detects the detection switches SWa and SWb. The levers Sa and Sb are sequentially depressed, and when the dead bolt 1 moves from the locked state to the unlocked state, the detection switch SWb which is operated afterward is not an unlock detection switch. Conversely, the dead bolt 1 is released. The detection switch SWa, which is operated after moving from the locked state to the locked state, is a locked detection switch.

FIG. 2 shows the configuration of the internal circuit in the apparatus of the present invention, and FIGS. 3 (a) to 3 (e) are time charts showing the operation of each section, and FIGS. 4 (a) to 4 (e). ) Describes the operation of the dead bolt and the operation of the detection switch from locking to unlocking.

The structure of the electrical internal circuit is as follows. The contacts E1 and S2 of the locking and unlocking operation switches are provided on the power supply E, and the diodes D1 and D4 are connected in reverse parallel to the contacts S3 and S4 of the set of detection switches SWa and SWb.
It is configured to be connected to a solenoid SOL that constitutes a drive unit via 2.

Each of the locking and unlocking operation switches has two interlocking contacts S
When both operation switches are alternately operated by the cross connection having 1 and S2, the polarity of the current supply to the drive unit SOL can be reversed.

In the case of the example in the figure, when the lock operation switch is operated, the contact
Since S1 and S1 are closed at the same time, a current flowing upward from the power supply E with a positive value flows to the drive unit SOL side, and when the unlock switch is operated, the contacts S2 and S2 are closed at the same time, and the drive unit SOL is closed. Power is supplied with the downward direction of the figure being positive.

Interlocking contacts S1 and S of such a locking and unlocking operation switch
1, a parallel connected 1 is connected between S2 and S2 and the drive unit SOL.
A set of diodes D1 and D2 and a set of detection switches SW described above
a, SWb contacts S3, S4 are connected as shown in the figure,
The power supply having the polarity set according to the operation of the unlocking operation switch can be supplied from the power supply E to the drive unit SOL.

In the figure, the cathode side of the diode D1 connected in anti-parallel is connected to the terminal a of the lock detection switch SWa and the unlock detection switch S
It is connected to the terminal b of Wb. The cathode side of the diode D2 is connected to the terminal b of the lock detection switch SWa and the unlock detection switch S.
It is connected to terminal a of Wb. Lock detection switch
The common terminal c of SWa and the unlock detection switch SWb is connected in common and connected to one end of a solenoid SOL. The other end of the solenoid SOL is connected to the power supply E through one of the interlocking contacts S1 and S2 of the lock operation switch and the unlock operation switch. To be connected to the minus terminal.

According to the electric locking / unlocking device having such a configuration, when the dead bolt 1 is in the locking position, the contact S3 of the lock detection switch is closed on the a side and the locking lamp is lit, and the dead bolt 1 is in the unlocking position. Occasionally, the contact S4 of the unlock detection switch is closed on the a side and the unlock lamp is lit.

Therefore, when the unlocking operation switch is operated when the dead bolt 1 is in the locking position, the interlocking contacts S1 and S1 are closed, so that the solenoid SOL of the driving unit is connected to the diode D1 and the contacts S3 and S4 (the SWa side is a (Closed, SWb side closes b) Power is supplied such that the upward direction of the drawing is positive, and the dead bolt 1 moves in the unlocking direction.

Then, due to the movement of the dead bolt 1 in the unlocking direction, the lock detection switch SWa is immediately activated, and the contact S3 is set to b
Solenoid through contact S3 when closed
Although the energization to SOL is cut off, at this time, since the contact S4 of the unlock detection switch SWb is in the closed state, the energization to the solenoid SOL via the diode D1 is continuously performed. . Then, the deadbolt 1 further advances in the unlocking direction, the unlocking switch SWb is operated, and the contact S4 is set to a
Only when it is in the closed state, the unlocking lamp is turned on and the power supply is cut off. Then, at this point, a current-carrying circuit in which the polarity is inverted to the solenoid SOL through the diode D2 is set.

When the locking operation switch is operated after the dead bolt 1 is moved to the unlocking position in this way, the interlocking contact
Since S2 and S2 are closed, the solenoid SOL side of the driving unit is connected through the diode D2 and the contacts S4 and S3 (the SWb side is closed a, the SWa side is closed).
(The side is closed.) Power is supplied so that the downward direction of the drawing becomes positive, and the deadbolt 1 moves in the locking direction.

Then, when the dead bolt 1 moves in the locking direction, the lock detection switch SWb is immediately activated, and the contact S4 is set to a
Solenoid SO through contact S4 when closed
Although the energization to L is cut off, at this point, the energization to the solenoid SOL via the diode D2 is continued because the contact S4 of the lock detection switch SWb is still closed. . Then, when the deadbolt 1 further advances in the locking direction and the lock detection switch SWa is operated, and the contact S23 is closed, the locking lamp is turned on and the energization is interrupted. At this time, a current-carrying circuit is set in which the polarity to the solenoid SOL is inverted through the diode D1.

In the above embodiment, one set of the detection switches is arranged in parallel with the dead bolt. However, one set of the detection switches is shifted to the position where the dead bolt is locked and unlocked. What is necessary is just to provide a configuration in which the respective detection switches are operated when the locked and unlocked states are completely achieved, so that the energization can be cut off and the energization polarity reversed.

[Effects of the Invention] As is clear from the above description, according to the present invention proposed in claim 1, it is regarded as a drawback of a conventional electric locking / unlocking device with a simple configuration in which only one set of detection switches is provided. It is possible to provide a surface-mounted electric locking / unlocking device in which the inability to energize due to a stop in the middle of the deadbolt and the problems of the setting of the inversion of energization polarity are eliminated.

According to the invention proposed in claim 2,
A surface-mounted electric locking / unlocking device having the same effect as that proposed in claim 1 can be easily configured using a conventional microswitch.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention, and FIGS.
The figure shows a conventional example. 1 and 1A are longitudinal sectional views of an embodiment showing an internal structure of a lock housing constituting a main part of the present invention,
2 is a cross-sectional view, FIG. 2 is a configuration diagram of an electric internal circuit, FIGS. 3 (a) to 3 (e) are time charts for explaining the operation of each part, and FIGS. 4 (a) to 4 (e) are dead bolts. FIG. 4 is an explanatory diagram showing one set of switches and operations in accordance with the operation of FIG. 5 and 5A are a longitudinal sectional view and a transverse sectional view showing the internal structure of a lock housing of a conventional surface-mounted electric lock device, and FIG. 6 is a configuration diagram of an electric internal circuit. FIG. 7 (a)
To (d) are time charts for explaining the operation of each part, and FIG.
FIGS. 7A to 7C are explanatory diagrams showing the switches and the operation in accordance with the operation of the deadbolt. [Explanation of symbols] A: Lock housing 1: Dead bolt 2: Drive unit (rotary solenoid) SW3: Contact of locking operation switch SW4: Contact of unlock switch E: Drive power supply D1, D2 One set of diodes connected in anti-parallel SWa Lock detection switch Sa Detection lever SWb Unlock detection switch Sb Detection lever

Claims (2)

(57) [Claims] 1. An electric locking / unlocking device in which a locking / unlocking operation switch is operated to invert a polarity of a power supply supplied to a driving unit to advance / retreat a deadbolt for locking / unlocking. A drive unit for moving the deadbolt forward and backward for locking and unlocking; a drive power supply for the drive unit; and a power supply polarity connected to the drive power supply and supplied to the drive unit by an alternative operation. A set of anti-parallel connected power supply supplied from the drive source to the drive unit via a contact of the lock / unlock switch for inverting the power supply. A set of locks connected to each of these diodes and for alternately opening and closing the respective contacts in order to switch and form an energizing circuit from the drive power supply to the drive unit in accordance with the advance / retreat operation of the dead bolt. , Solution Electric unlocking apparatus which is characterized in that a detection switch. 2. The locking / unlocking detection switch of claim 1, wherein each of the locking / unlocking detection switches comprises a microswitch having a detection lever inclined and projected, and each of the detection levers projects in opposite directions so as to cross each other. The electric locking / unlocking device according to claim 1, wherein the electric locking / unlocking device is configured to be juxtaposed with the dead bolt.