JPH0344942Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to an electric lock used for doors, etc., which is widely used, and has a simple and rational structure and is easy to install. In particular, it is easy to use as an auxiliary lock and will find wider use in the future as an electric lock that can be operated remotely.

(b) Conventional technology In recent years, mechanical locks have been replaced by locks that can be operated remotely.
So-called electric locks, which are highly safe, have come into use. However, current electric locks are structurally the same as conventional mechanical locks, but incorporate an electromagnetic drive mechanism such as an electromagnet inside, and they also incorporate various sensors and control circuits, so the structure is quite complex. It has become a thing.

(c) Problems that the invention aims to solve Conventional electric locks with the above structure are expensive and large in size due to their complicated structure, but the electromagnetic drive mechanism is relatively large. Because of its structural components, it cannot be made large enough, its internal mechanisms must be operated with very weak driving force, and its reliability is problematic.

(d) Means for solving the problems In order to solve the above problems, the present invention has a rational structure that is completely different from conventional electric locks.

That is, the main body is attached to the door frame, and the main body is provided with a receiving hole portion that supports the tip of the spindle when it is protruding from the main body. A receiving part inserted between the main body and the receiving hole is fixed to the door side, and the door is locked by passing the hole provided in the receiving part with the spindle when the door is closed. Ru. The spindle is directly driven by a so-called bistable electromagnet, and control is performed according to the operation of first and second sensors that detect the presence or absence of a receiving part provided inside the main body and the state of protrusion and retraction of the spindle. It also has the function of preventing the spindle from protruding when the door is open.

(E) Function When the door is closed, the first sensor detects that the receiving part has entered between the main body and the receiving hole, and when the electric lock configured as described above detects that the door has been closed, an external signal is sent. can be detected more easily. In this state, the door can be locked, and the door is locked by applying a current to the electromagnet and causing the spindle to protrude. The tip of the spindle is supported by the receiving hole and is in a so-called double-sided state, so it has sufficient strength to withstand strong force applied to the door from the outside. Further, the locked state can be known from the outside by a second sensor that detects the protruding and retracting state of the spindle. In order to unlock the lock, all you have to do is run a current in the opposite direction through the electromagnet, so control is extremely simple. The first sensor also acts to mechanically limit the protrusion of the spindle when the door is open.

(f) Examples The invention will be explained with reference to the following figures.

FIG. 1 is a side sectional view showing the structure of an embodiment of the present invention, and FIG. 2 is a top sectional view showing the state of use. 1 and 2, a main body 1 is provided with a spindle 3 that is loosely fitted into a hole 2 so as to be able to slide freely in the axial direction, and a receiving hole 4 that is to support the tip of the spindle 3 when it projects is provided. A receiving hole portion 5 extending from the main body 1 is provided. The spindle 3 is made of a non-magnetic material such as stainless steel, and a movable iron core 6 made of a magnetic material is directly connected to its rear end. Constrictions 7 and 8 are provided at both ends of the movable iron core 6, and two coils 9 and 10 are arranged in series, and a hole 12 and a hole 12 in an intermediate member 11 disposed between the coils 9 and 10 are provided. The pipe 1 passes through holes 14 and 15 provided in the portions of the yoke 13 that are formed so as to wrap around the coils 9 and 10 and are in contact with the end surfaces of the coils 9 and 10.
6 so that it can slide loosely inside. Further, a ring 17 is fixed to the rear end of the movable iron core 6, and two claws 18, 1 that engage with the ring 17 are fixed to the rear end of the movable iron core 6.
A shaft 2 in which a lever 20 having a diameter of 9 is implanted in the main body 1
1 and the other end 22 of the lever 20.
engages with the micro switch 23 which serves as a second sensor, and is configured to be held by suction with a fixed magnet 24 when the button of the micro switch 23 is pressed. The steel wire 25 has a slightly twisted U-shape as a whole, and its middle part fits into the groove 26, and one end is connected to holes 2 and 4 as shown by the dashed line when the door is open. It is arranged diagonally across the space between the spindle 3 and the spindle 3, and is located in a position that prevents the spindle 3 from protruding.When the door is closed, the holder 29
The spindle is pushed to the position shown by the solid line, and the spindle is in a state where it can be ejected. Further, the other end 27 of the steel wire 25 is connected to a micro switch 28 which serves as a first sensor.
The other end 2 engages with the other end 2 due to the rotational movement when the door closes.
7 is configured to operate a micro switch 28. On the other hand, a receiving fitting 29 is inserted into the space between the main body 1 and the receiving hole 5, and the receiving fitting 29 is provided with a hole 30 to be penetrated by the spindle 3. 31 is a door frame, to which the main body 1 is attached through a mounting hole 32 with screws 33. Further, 34 is a door, and a receiving metal fitting 29 is attached to it through a mounting hole 35 with screws 36.

In the electric lock configured as described above, when the door is open, one end of the steel wire 25 crosses the hole 2 and prevents the spindle 3 from protruding. Therefore, if the electric lock is left in the locked state by mistake, then the door is closed. When closed, the bracket 29 and spindle 3 will not collide. When the door 34 closes, the receiving metal fitting 29 is connected to the main body 1 and the receiving hole portion 5.
When inserted between them, one end of the steel wire 25 is pushed and rotated, and the other end 27 activates the micro switch 28, making it possible to lock. When the coils 9 and 10 are energized from the outside in this state, the spindle 3 protrudes from the hole 2 through the hole 30 of the receiving fitting 29 due to the magnetic force generated in the movable iron core 6, and reaches the receiving hole 4. In this locked state, the spindle 3 is in a so-called double-supported state with the hole 2 and the receiving hole 4, so even if a strong force is applied to the door 34 from the outside and the force is applied to the spindle 3 by the receiving fitting 29, it is sufficient. I can withstand this. In addition, the operating state of the spindle 3 is determined by the ring 17 at the end of the stroke of the iron core 6.
This can be determined by detecting when the lever 20 is rotated by pressing the claw 18 and the micro switch 23 is activated. Unlocking the lock is extremely simple since it is sufficient to flow currents in opposite directions through the coils 9 and 10. In this case, the ring 17 engages with the claw 19 at the end of the stroke of the movable iron core 6, rotates the lever 20, and reverses the micro switch 23. In this state, the lever 22 is attracted and held by the magnet 24. be done. Furthermore, as is clear from Fig. 1, most of the interior of the main body 1 is occupied by electromagnets consisting of coils 9, 10, yoke 13, etc., and it is possible to incorporate an extremely large electromagnet into the small main body. The magnetic force is large enough to move the spindle 3, and the reliability is very high. In addition, there are no moving parts other than the electromagnet, and the structure is extremely simple, so there is no cause for failure and it can be manufactured at low cost. In addition, the door frame 31 and the door 34 can be attached to the door frame 31 and the door 34 using only screws, and there is no need to dig a square hole or the like, so the door 34 can be easily attached to the door 34 regardless of its material.

FIG. 3 is a side sectional view showing the structure of another embodiment of the present invention, and FIG. 4 is a top sectional view showing its usage. In Figures 3 and 4, the movable iron core 6
A rod 37 is provided on the side opposite to the spindle 3, and protrudes through a hole 38 to the outside of the main body 1. 39 is a knob fixed to the rod 37. Further, the receiving metal fitting 40 has a plate shape with mounting holes 41 at both ends and a hole 42 in the center. For installation, attach the main body 1 to the door 43 in the opposite way to the case shown in Figs. 1 and 2, and attach the bracket 40 to the door frame 44.
Attach to. The operating condition is almost the same as that shown in FIG. 1, but the spindle 3 can be manually moved in and out using a knob 39. Therefore, it can be used as a so-called auxiliary lock that is attached to the inside of a door and can be operated both manually and remotely using electricity.

(g) Effects of the invention As is clear from the above explanation, the electric lock of the invention has a large electromagnetic force because it can incorporate a large electromagnet, and is strong because the spindle is supported on both sides. In addition, installation is easy and there are no parts that could cause a malfunction.The structure is extremely simple, consisting only of steel wires that are pushed into the receiver and rotated, interlocking with the micro switch.When the door is open, the latch bolt does not protrude. Because consideration has been taken to prevent
Since there is no operational error, it is highly reliable and can be made at a low price, it can solve almost all of the problems of conventional electric locks, and has an extremely significant effect on the industrial world.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the structure of one embodiment of the present invention, Fig. 2 is a top sectional view showing its usage condition, and Fig. 3 is a sectional side view showing the structure of an embodiment of the present invention.
The figure is a side sectional view showing the structure of another embodiment of the present invention.
FIG. 4 is a top sectional view showing the state of use. 1... Main body, 3... Spindle, 5... Receiving hole, 6... Movable iron core, 9, 10... Coil, 13
...York, 23...Micro switch, 28...
...Micro switch, 29...Bracket.

Claims (1)

[Scope of utility model registration request] A receiving metal fitting having a receiving hole part fixedly attached to the main body to support the protruding tip of the spindle that protrudes and retracts from the main body, and having a hole that is sandwiched between the main body and the receiving hole part and penetrated by the spindle. , a first sensor that detects the presence or absence of the metal holder, and a second sensor that detects the state of protrusion and retraction of the spindle, and has a structure in which the first sensor prevents the spindle from protruding when there is no metal holder, and the structure is such that the first sensor prevents the spindle from protruding. An electric lock characterized by its movement as if it were an electromagnet.