JPH0425893Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric door lock in which a locking/unlocking means is driven by an electric actuator such as a solenoid.

[Conventional technology]

Conventional electric door locks are equipped with a latch bolt that moves in and out in conjunction with the rotation of the handle, a locking/unlocking means for regulating the rotation of the handle, and a solenoid for driving the locking/unlocking means. There is. When locking or unlocking the electric door lock, the solenoid is driven to engage or disengage the stopper of the locking/unlocking means with the latch bolt.

However, with the solenoid used in the conventional electric door lock, the solenoid must be energized while the stopper and latch bolt remain disengaged, which significantly reduces power consumption. It has the disadvantage of causing For this reason, the internal battery that this electric door lock is equipped with tends to be insufficient in power supply, and it is necessary to supply power to this electric door lock from the outside, so it is difficult to make this electric door lock function on its own. The problem was that it was extremely difficult.

Therefore, for example, in Utility Model Application Publication No. 11968/1983,
A latch stopper that rotates between a locked position in which the latch bolt is engaged and an unlocked position in which it is disengaged is installed in parallel with the latch bolt, and the rotation of the latch stopper is caused to move forward and backward by instantaneous energization. An electric lock powered by a double keep solenoid is disclosed.

[The problem that the idea aims to solve]

However, in the electric lock described in the above-mentioned conventional publication, although it is possible to reduce power consumption, the following problems still occur. In other words, in the above conventional structure, when the handle is forcefully rotated in the locked state, the rotational force is generated by the square core to which the handle is connected, the latch cam fitted around the square core, and the latch cam that is fitted around the square core. The latch operation lever is rotated by the latch cam, and the latch operation is transmitted to the latch bolt in turn, and the retracting movement of the latch bolt is blocked by the latch stopper that engages with it, making it impossible to rotate the handle. The condition is maintained. In such a structure, if an excessive rotational operation force is applied to the handle in the locked state, this operation force will be
As mentioned above, it acts on many components, from the handle to the latch stopper.

Therefore, in order to maintain the initial assembly accuracy over a long period of time against the above-mentioned rotational operating force, each component must have a sufficiently large assembly strength. Is required. For example, in a pivoting member such as a latch stopper, the diameter of the pivot shaft, which is installed upright on the wall of the lock body, is usually made larger, and the shape of the pivoting member itself, such as the latch stopper, that is fitted onto the pivot shaft is also increased. It is necessary to configure it in a larger size. Further, in the case of linear sliding parts such as latch bolts, it is necessary to make the guide member thicker to maintain strength. In this way, in the above cited example, it is necessary to construct and assemble many parts in consideration of high strength, so it is not possible to achieve sufficient miniaturization, and the manufacturing cost is also high. This is causing the problem of rising prices.

This invention was made in view of the above, and
The purpose is to provide an electric door lock that can reduce power consumption in an electric actuator that drives a locking/unlocking means that restricts rotation of a handle, and can also be made smaller and less expensive.

[Means to solve the problem]

In order to achieve the above-mentioned object, the electric door lock of the present invention includes a cam member fitted onto the rotating force transmitting member to which the handle is connected, and a projecting and retracting member that moves in and out in conjunction with the rotation of the cam member. , an electric door lock comprising a locking/unlocking means for regulating the rotation of the handle, and a double keep solenoid for driving the locking/unlocking means, wherein the locking/unlocking means controls the movement of the plunger of the double keep solenoid. It consists of a cam joint that rotates in conjunction with the operation, and a cam stopper that restricts the rotation of the cam member by fitting one end into a recess formed on the outer periphery of the cam member. The cam member is characterized in that it is formed to slide on a straight line intersecting the rotation direction of the cam member as the cam member rotates.

[Effect]

In the electric door lock having the above configuration, one end of the cam stopper is fitted into the recess of the cam member connected to the handle via the rotational force transmission member, thereby achieving a locked state in which rotation of the handle is prevented. Retained. Therefore, if a rotation force is forcibly applied to the handle in this locked state, the direction in which the rotation force acts on the cam member and the sliding direction of the cam stopper will intersect, so the slide guide structure for the cam stopper will not move properly. If the guide structure for the cam stopper has sufficient strength in the direction in which the rotational operating force is applied, the operating force can be received by the guide structure for the cam stopper. Therefore, the above-described rotational operating force does not apply to the cam joint connected to the cam stopper.

In this way, since the rotation of the cam member is regulated by the cam stopper in the above example, if the range from the handle to the cam stopper is configured to have strength to withstand excessive operating force in the locked state, the above cam joint and The above-mentioned excessive operating force acts on the double keep solenoid that drives the solenoid, as well as the latch bolt and other protruding and retracting members, and the member that links the protruding and retracting movement of this protruding and retracting member with the rotation of the cam member. There is no need for strength that takes into account the Therefore, except for the components up to the cam stopper, the other components can be made more compact. In addition, a cam stopper is installed to restrict the rotation of the cam member that causes rotational movement.
Since it can be configured as a sliding member as described above, a guide groove can be bored in the wall of the lock body without having to construct a separate large-diameter pivot on the wall of the lock body as in the past. It can be a simple structure such as. As a result, by using a double-keep solenoid as an electric actuator that drives the locking/unlocking means, it is possible to reduce power consumption, make the entire structure more compact, and
It becomes possible to produce it at a lower cost.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the electric door lock 1 according to the present invention, as shown in FIG. 2, the indoor case 2 and the outdoor case 3 are disposed facing each other with a door 4 in between. In the lower portions of both cases 2 and 3, an indoor corner core 5 and an outdoor corner core 6 that pass through the cases 2 and 3 and reach approximately the center of the door 4 are separated from each other, and , each of which is rotatably provided. A knob or lever (not shown) as a handle is provided at each outer end 5a, 6a of the two square cores 5, 6.
are provided, and the inner ends 5b, 6b are engaged with square holes 8a, 9a of latch cams 8, 9 in the locking mechanism 7, respectively, as shown in FIGS. 1a and 1b. A retractor 10 that slides in conjunction with the rotation of the latch cam 8 or 9 is provided near the latch cams 8 and 9. A latch bolt 11 is provided as a retractable member that retracts and retracts in conjunction with the sliding movement of the latch bolt 11. Above this latch bolt 11, the latch bolt 1
A latch stopper 29 is provided to restrict the retraction of the latch. In addition, the latch cams 8 and 9 have the following features:
Notches 8b and 9b are respectively formed in the latch cam (cam member) which is fitted onto the inner end of the outdoor corner core (rotational force transmitting member) 6.
One end 13a of the cam stopper 13 is engaged with 9b. And this cam stopper 1
The other end 13b of the cam joint 3 is engaged with a first protrusion 14a of a rotatably provided cam joint 14. The cam stopper 13 and the cam joint 14 constitute a cam stopper mechanism 12 as locking/unlocking means. Also, the second projecting piece 14b in this cam joint 14
When the engagement between the cam stopper 13 and the notch 9b is released, the cam joint 14
It is formed so that an unlock switch 15 provided near the door can be turned on. Furthermore, a notch 14c is formed in this cam joint 14, and this notch 14c is engaged with a pin 18 provided at the tip of a plunger 17 in the double keep solenoid 16. This double keep solenoid 16 is equipped with two permanent magnets for maintaining the plunger 17 in the advanced state and in the retracted state, and the plunger 17 is held in either of the above two states by instantaneous energization. It is configured as follows. This double keep solenoid 16 is connected to the printed circuit board 1 as shown in FIG.
It is electrically connected to a control means 20 configured on 9 and 19. This control means 20, for example,
One chip with I/O, ROM and RAM
It is the CPU. The printed circuit boards 19, 19 provided with the control means 20 are arranged directly above the card reader 21 which reads data recorded on the card 23 via spacers 22. The card reader 21 is connected to the outdoor case 3
An opening 3a is formed in the outdoor case 3 at a position corresponding to the card insertion slot 21a of the card reader 21.
Then, a battery box 2 for storing the internal battery 24 is provided.
5 is built into the indoor case 2, and a removable lid 2a is provided at a location in the indoor case 2 that corresponds to the battery box 25. Further, in this electric door lock 1, a thumb turn 26 is provided on the indoor side for use in an emergency, and a key 27 is used to lock and lock the door on the outdoor side.
A cylinder 28 for unlocking is provided.

In the above configuration, when the card 23 is inserted into the card reader 21 and the control means 20 determines that the card 23 is a compatible card, the control means 20 instantaneously energizes the double keep solenoid 16. . The double keep solenoid 16, which receives this instantaneous energization, retreats its plunger 17 in the direction A, and this plunger 17 is held in this retreated state by the permanent magnet for holding the plunger 17 in the retreated state. Since the attraction force of the permanent magnet is very strong, the door will not come out of the holding state due to shock or vibration when the door is hit. Furthermore, even if the magnet deviates from the attracted state for a while, it can be restored to its original state due to the attractive force of the permanent magnet. The cam joint 14 is rotated in the B direction by a pin 18 provided at the tip of the plunger 17. This rotation of the cam joint 14 in the B direction causes the second
The protrusion 14b turns on the unlock switch 15, and the first protrusion 14a moves the cam stopper 13 in the C direction. As a result, the engagement between the notch 9b in the latch cam 9 and the cam stopper 13 is released, and the latch cam 9 becomes rotatable. By turning the square core 6 with the handle and rotating the latch cam 9 in the D direction with this square core 6,
The retractor 10 slides in the E direction. By this sliding of the retractor 10 in the E direction, the restriction on retraction of the latch bolt 11 in the latch stopper 29 is released, and the latch bolt 11 retracts into the locking mechanism 7. Thereby, it becomes possible to open the door 4 provided with this electric door lock 1. When locking this electric door lock 1, the control means 20
The double-keep solenoid 16 is instantaneously energized with a polarity opposite to that for unlocking. The double keep solenoid 16, which receives this instantaneous energization, uses a permanent magnet to keep the plunger 1 in its advanced state.
7 is held in the advanced state. Therefore, as an electric actuator, this double keep solenoid 1
By using 6, there is no need to maintain the energized state while locking or unlocking.
Significant consumption of power can be avoided. Therefore, the electric door lock 1 can function independently without supplying power from the outside. Moreover, since the double keep solenoid 16 is sufficiently reliable against vibrations and shocks, the reliability of the electric door lock 1 can be improved.

Further, in the above embodiment, even if a force for rotating the handle is forcibly applied to the handle in the locked state where the rotation of the handle on the outdoor side is prevented, the cam stopper 13
If the sliding movement against the cam stopper 13 has a sufficiently strong guide structure, the above operating force will be transmitted only to the cam stopper 13 via the square core 6, and will be received by the above guide structure for the cam stopper 13. The above-mentioned turning operation force does not extend through the cam stopper 13 to the cam joint 14 and the like connected thereto. Therefore, in the above configuration, if the range from the square core 6 to the cam stopper 13 is configured to have strength to withstand excessive operating force in the locked state, the cam joint 14 and the cam stopper 13 can be driven. Double keep solenoid 16, and
The latch bolt 11 and the like do not need to be strong enough to take into account the above-described excessive operating force. As a result, except for the components up to the cam stopper 13, the other components can be made more compact, making it possible to manufacture the entire device more compactly and at lower cost.

[Effect of idea]

As described above, in the electric door lock of the present invention, the locking/unlocking means that restricts the rotation of the handle has a cam joint that rotates in conjunction with the forward and backward movement of the plunger of the double keep solenoid, and one end that is attached to the outer periphery of the cam member. and a cam stopper that restricts the rotation of the cam member by fitting into the formed recess, and the cam stopper slides on a straight line intersecting the rotational direction of the cam member as the cam joint rotates. This is the configuration that is designed to do so.

As a result, if the parts from the handle to the cam stopper are configured to have the strength to withstand the excessive operating force applied to the handle in the locked state, the cam joint, the double keep solenoid that drives it, and the latch bolt The protruding and retracting members such as the above do not require a strength that takes into consideration the above-mentioned excessive operating force. Therefore, except for the components up to the cam stopper, the other components can be made more compact. In addition, the cam stopper for restricting the rotation of the cam member that generates rotational movement can be configured as a sliding member as described above, so it can be easily configured by, for example, drilling a guide groove in the wall of the lock body. It can be a structure.
As a result, by using a double-keep solenoid as the electric actuator that drives the locking/unlocking means, it is possible to reduce power consumption, and also to make the entire structure more compact and cheaper. This effect is achieved.

[Brief explanation of the drawing]

FIG. 1a is a block diagram showing an embodiment of the present invention, FIG. 1b is a sectional view taken along the line X--X in FIG. 1 is an electric door lock, 5 is an indoor corner core, 6 is an outdoor corner core (rotational force transmission member), 9 is a latch cam (cam member), 10 is a retractor, 11 is a latch bolt (a retractable member), and 12 is a cam stopper. Mechanism (locking/unlocking means), 13 is a cam stopper, 14 is a cam joint, and 16 is a double keep solenoid.

Claims (1)

[Scope of Claim for Utility Model Registration] A cam member fitted onto the rotating force transmitting member to which the handle is connected, a projecting and retracting member that moves in and out in conjunction with the rotation of the cam member, and a mechanism that restricts the rotation of the handle. An electric door lock comprising a locking/unlocking means and a double keep solenoid for driving the locking/unlocking means, wherein the locking/unlocking means is a cam joint that rotates in conjunction with the forward and backward movement of a plunger of the double keep solenoid. and a cam stopper whose one end side fits into a recess formed on the outer periphery of the cam member to restrict the rotation of the cam member, and the cam stopper restricts the rotation of the cam member as the cam joint rotates. An electric door lock characterized by being formed to slide on a straight line intersecting the direction of rotation.