JPH0345499Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a simple electric lock, and in particular, although it is an electric lock that is unlocked by an electric unlock signal, it cannot be locked during a power outage. To provide a simple electric lock which functions as a normal cylinder lock, has a simple structure, and operates smoothly.

[Conventional technology and problems]

For example, so-called electric locks use a microcomputer to determine the code entered using a numeric keypad, output an unlocking signal if the code is legitimate, and are activated by the generation of this unlocking signal. An electromagnetic actuator such as a solenoid or a micromotor moves a dead bolt or a dead bolt that also serves as a latch bolt, or a strike on the door frame side that locks these is freed to open the door.

In particular, in the case of an electric lock that operates a dead bolt that also serves as a latch bolt, the dead bolt must be moved a considerable distance while slidingly contacting the opening edge of the bolt insertion hole of the strike plate, so it is necessary to There is a disadvantage that the electromagnetic actuator requires a considerably large operating force, such as when driving a dead bolt with a micromotor. This also applies to electric locks that operate a dedicated dead bolt that does not have the function of a latch bolt.

In addition, the type of electric lock that moves the member on the door frame side that locks the dead bolt is difficult to link with the cylinder lock that is normally installed on the door side in case of a power outage, so in the end, an electric lock and a cylinder lock were installed together. This has the disadvantage of complicating the configuration.

[Purpose of invention]

Therefore, an object of the present invention is to provide a simple electric lock that functions both as an electric lock and a cylinder lock, has a simple structure, and is extremely smooth in operation.

[Means for solving problems]

In order to achieve the above object, the present invention includes a latch block support that is movably guided within the lock box in the front and back direction perpendicular to the free edge of the door, and protrudes from the front end of the free edge of the door. In addition, there is a slider biased forward, a latch lever supported and guided by the slider so as to be movable in the front-rear direction, a stop surface having the same vertical generatrix, and an oblique surface in front of the stop surface. A latch block is formed with intersecting slopes and a curved surface portion projecting rearward at the rear end of the slope, and a portion of the rear end near the above-mentioned stop surface is pivotally connected to the front end of the latch rod. , a locking mechanism that is integrally attached to the slider and removably locks the latch rod to the slider;
an electromagnetic actuator disposed inside the lock box and controlled by an unlock signal; a dead cam disposed within the lock box together with this electromagnetic actuator and driven by a cylinder lock attached to the door; A first transmission mechanism that connects the actuator and the locking mechanism and disengages the slider and latch rod when the former is activated; and a first transmission mechanism that connects the dead cam and the locking mechanism and disengages the slider and the latch rod when the former is activated. and a second transmission mechanism for disengaging the latch from the latch when the latch rod is locked to the slider via the locking mechanism and the locking surface of the latch is approximately parallel to the door surface. It is characterized in that the curved surface portion and the latch block support portion of the slider are brought into contact with each other.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 designates a lock box, and this lock box 1 is housed in a lock box cavity recessed in the free edge of the door and fixed with bolts.

Inside the lock box 1, there is provided a slider, the entirety of which is indicated by the reference numeral 2. In the illustrated embodiment, the slider 2 is formed by bending a plate material into a box shape with one side open, and its front end (see FIGS. 1 and 2).
A latch block support portion 4 for controlling the rotation of a latch block 3, which will be described later, is integrally protruded from the left end in the figure. In the illustrated embodiment, the latchblock support 4 is in the form of a pair of horizontal edges from which the upper plate 2a and lower plate 2b of the slider 2 extend forwardly.

On the other hand, on the inner surface of one side plate of the lock box 1, a latch spring receiving plate 5 having an L-shaped cross section is fixed, for example, by caulking (see Fig. 4), and the latch spring receiving plate 5 has an L-shaped cross section.
The latch spring receiving plate 5 is housed in the opening of the box-shaped portion and is slidably engaged with the latch spring receiving plate 5.

Further, as will be described later, the slider 2 is integrally connected to a latch block 3, and the latch block 3 is movable in the front-back direction through a latch hole 7 opened in a front plate 6 attached to the free edge of the door. are guided by. Therefore, the slider 2 is guided so as to be movable within the lock box 1 in the front-rear direction (left-right direction in FIG. 1) perpendicular to the free edge of the door.

On the other hand, the slider 2 carries a latch rod 8. As shown in FIG. 3, the latch rod 8 is a plate-shaped rod in which, for example, a rectangular head whose front edge is partially shaved off and an elongated main body are integrally connected, and the front end of the head is A first connecting pin hole 8a is provided near one side edge of the main body, and a locking hole 8b is provided at the rear end of the main body so as to pass through the latch rod 8 in the thickness direction. are doing.

On the other hand, the front plate 2c (FIG. 1) and rear plate 2d (FIG. 2) of the slider 2 are transparently provided with rectangular openings that slidably fit into the main body of the latch rod 8. The rod 8 is supported and guided so as to be movable back and forth relative to the slider 2, with its main body inserted through these openings from the front. Furthermore, as shown in Fig. 2, the slider 2
The portion of the latch spring receiving plate 5 inside which interferes with the latch rod 8 is cut out.

A latch spring 10 as a compression coil spring is elastically mounted between the front plate 2c of the slider and the latch spring receiving plate 5 in the slider so as to wrap around the main body of the latch rod 8. Therefore, the slider 2 is biased to the left (forward) in FIG.

On the other hand, a latch block 3 is pivotally mounted to the front end of the latch rod 8 so as to be rotatable about a vertical axis.

As shown in FIG. 3, this latch block 3 has a strike plate 9 (FIG. 4) fixed to the door frame.
A blocking surface 3a that engages with the opening edge of the latch insertion hole 11 to lock the door to the door frame, a slope 3b obliquely intersecting the blocking surface 3a in front of the blocking surface 3a, and a slope 3b behind the slope 3b. A substantially right-angled horizontal section 3, each having a curved surface portion 3c connected to the end so as to protrude rearward.
It is a rectangular block body with the above-mentioned blocking surface 3a and slope 3b.
The curved surface portions 3c and 3c have the same generatrix direction, and the generatrix direction is approximately vertical when the latch block 3 is attached to the lock box 1 via the latch rod 8 and the slider 2.

Further, a horizontal notch 3d for receiving the head of the latch rod 8 is formed at the center of the rear end of the latch block 3.

Furthermore, a second connecting pin hole 3e that passes through the latch block 3 in the vertical direction is formed in a portion of the rear end of the latch block near the blocking surface 3a.

As shown in FIGS. 1 and 2, the latch block 3 and the latch rod 8 are aligned so that the second connecting pin hole 3e of the latch block and the first connecting pin hole 8a of the latch rod (FIG. 3) are aligned. Insert the tip of the latch rod into the notch 3d of the latch block so that the first and second connecting pin holes 8a and 3
They are integrally connected by passing a connecting pin 12 through e. The connecting pin 12 is rotatably fitted into the first connecting pin hole 8a and/or the second connecting pin hole 3e, so that the latch block 3 is rotatable relative to the latch rod 8. It is pivoted to.

Also, as is particularly clearly shown in FIG. 4, the vertical inner surface of the notch 3d (FIG. 3) of the latch block is inclined forward toward the inclined surface 3b, and the inclined inner surface 3f
On the other hand, since the front edge of the latch rod 8 facing the inclined inner surface 3f is cut obliquely as described above, the latch block 3 is rotated at a constant angle clockwise as shown in FIG. Can rotate.

As shown in Figures 1 to 3, the upper and lower surfaces of the latch block 3 are cut horizontally by a predetermined amount, leaving the rear edge. ) is formed. As shown in FIG.
The slider 2, which is urged forward by an elastic force of 0, and the latch rod 8 and latch block 3 supported by the slider 2 are latched to the front plate 6, thereby stably maintaining their operating positions in the normal state.

On the other hand, at the rear end of the slider 2, as shown in FIGS. 1 and 2, a locking mechanism, generally designated by the reference numeral 15, is integrally attached to the slider 2.

This locking mechanism 15 has a selector 16 as shown in FIG. 2, for example. This selector 16
The actuating piece 16b is integrally formed by vertically bending one end of the elongated stepped rectangular first connecting piece 16a,
The other end side edge of the first connecting piece 16a is connected to the operating piece 1.
6b to form an L-shaped second connection piece 16c, and the free end side edge of this second connection piece was further bent to be parallel to the actuation piece 16b to form a support piece 16d. A selector pin 17 is implanted on the surface of the supporting piece 16d that faces the actuating piece 16b. In addition, the actuating piece 16
A notch 16e is formed at the base of the front edge of b.

The selector 16 configured as described above engages the first and second connecting pieces 16a and 16c with notches formed on the rearward extending side edges of the upper plate 2a and lower plate 2b of the slider 2. , first connection piece 1
The lower surface of the slider 6a in FIG. 2 is brought into sliding contact with one side plate of the lock box 1, so that the rear end of the slider 2 can be moved in a direction perpendicular to its biasing direction (vertical direction in FIG. 1). being guided.

Further, as shown in FIG. 1, a selector spring 18 as a compression coil spring is elastically mounted between the support piece 16d and the extension portion of the lower plate 2b of the slider.
Due to the elasticity of the selector spring 18, the selector 1
6 is biased upward.

Note that the opening position of the locking hole 8b in the latch rod 8 is such that the stepped portion of the head of the latch rod 8 is located close to the slider 2.
The selector pin 17 is set to engage with the locking hole 8b when the selector pin 17 comes into contact with the front plate 2c (see FIG. 4). When the selector pin 17 is engaged in the locking hole 8b of the latch rod, the latch rod 8
is removably locked to the slider 2 via the selector 16 and selector pin 17.

Furthermore, the formation positions of the latch block support parts 4, 4 at the front end of the slider 2 are in the normal state shown in FIG. In this case, the latch block support parts 4, 4 are arranged so as to come into contact with the curved surface part 3c of the latch block 3.

On the other hand, as shown in FIG. 1, an electromagnetic actuator 19 is disposed at the top of the lock box 1. The electromagnetic actuator 19 in the illustrated embodiment is a solenoid of a type that draws in a plunger 21 when energized, and a plunger pin 22 is attached to the head of the plunger 21 and extends through it in the thickness direction of the door.
is driven in, and both ends of the plunger pin 22 protrude from the outer peripheral surface of the plunger 21.

A bell crank-like first drive lever 23 is provided near the plunger 21 so as to be swingable about a first support shaft 24 .

One end of the first drive lever 23 is bent into a U-shaped cross section (not shown), and the head of the plunger 21 is sandwiched between a pair of mutually parallel end plates.
The plunger pin 22 is connected to the head of the plunger 21 so that the plunger pin 22 is engaged with a U-shaped notch formed in the end plate. Further, the first drive lever 23 is biased counterclockwise in FIG. 1 by the elasticity of the torsion coil spring 25 wound around the first support shaft 24, so that the nolenoid 19 is not energized. At times, the plunger 21 is in a withdrawn state from the coil as shown.

The other end of the first drive lever 23 is bent to form a step, and a drive pin 26 is integrally implanted on the upper surface of the tip in FIG.

Between the first drive lever 23 and the slider 2, there is a second drive lever 2, also like a bell crank.
7 is provided so as to be swingable around the second support shaft 28. One end of the second drive lever 27 abuts or extends very close to the drive pin 26, and the other end is bent downward to form a step in FIG. The tip thereof is in contact with the upper surface of the operating piece 16b (see FIG. 2) of the selector 16.

Note that these first and second drive levers 23 and 27 constitute a first transmission mechanism that connects the solenoid 19 as an electromagnetic actuator and the locking mechanism 15.

On the other hand, as shown in FIG. 1, a plate-shaped dead cam 29 is located at the rear of the lock box 1 and below the solenoid 19 within a certain angle range (approximately in the illustrated embodiment).
90°) can be rotated. This dead cam 29 has a clutch hole 31 opened in its center.
In addition, it accepts the dead cam operating member of the cylinder lock attached to the door and, if necessary, an inner operating member such as a thumb turn provided on the inside of the door (both not shown), and unlocks the lock by following these operating members. The procedure is the same as the conventional method. Therefore, Detsudo Cam 2
An operating cam 29a is integrally formed at one end of the cam 9 to protrude. Further, a chevron portion 29 is located at a position symmetrical to the operating cam 29a with respect to the center of the dead cam 29.
b is formed, and the snap action property is imparted to the operation of the dead cam 29 by the elasticity of the snap spring 32 which is in elastic contact with the linear end edge of this chevron-shaped portion 29b, which is different from the conventional dead cam. The same is true.

Between the dead cam 29 and the solenoid 19, as shown in FIG. It is pivotally supported so that it can swing.

One end of the third drive lever 33 faces above the drive pin 26 of the first drive lever 23 so as to be able to engage with the drive pin 26, and the lower edge of the other end of the third drive lever 33 resists the moment due to gravity, for example. Then,
It abuts against the straight edge of the chevron-shaped portion of the dead cam and maintains the substantially horizontal position shown in the first figure. Further, a stopper pin 35 is implanted on the lower surface of one end of the third drive lever.

The third drive lever 33, the drive pin 26, and the second drive lever 27 constitute a second transmission mechanism that interconnects the dead cam 29 and the locking mechanism 15.

Although this is not an essential component of the present invention, a substantially linear hold lever 36 is provided above the slider locking mechanism 15. This hold lever 36 has its center portion connected to the fourth support shaft 3.
7, and this fourth
The support shaft 37 is biased counterclockwise in FIG. 1 by the elasticity of the torsion coil spring 25 wound around the support shaft 37. The hold lever 36 as a whole is
The other end of the first drive lever 23 and the second and third drive levers 27 and 33 extend downward in FIG. The other end enters a notch 16e formed in the operating piece of the selector 16 (FIG. 2) and is locked to the edge of the notch 16e.
Under normal conditions, the position shown in the first figure is maintained stably despite the biasing force of the torsion coil spring 25.

[Effect]

In the simple electric lock according to one embodiment of the present invention constructed as described above, in the locked state shown in FIGS. 1 and 4, the latch block 3 is inserted into the latch insertion hole 11 of the strike plate 9, and its impact The door is locked to the door frame by the stop surface 3a coming into contact with the opening edge of the latch insertion hole 11, similar to a conventional electric lock or locking device using a dead bolt that also serves as a latch bolt.

However, in conventional locking devices, the force for locking the door is applied as lateral pressure to the head of the latch bolt, and as a result, the latch bolt is strongly pressed against the opening edge of the front hole. The locking force acts to rotate the latch block 3 clockwise in FIG. Therefore, the latch block 3 tries to rotate around the connecting pin 12, but this rotation moves the slider 2 rearward (inside the lock box) via the latch block support parts 4, 4 of the slider that are in contact with the curved surface part 3c of the latch block. ) is converted into a pushing motion. However, as described above, the slider 2 is relatively locked to the latch rod 8 via the locking pin 17, and this latch rod 8 is connected to the latch block 3 via the connecting pin 12, so the The force for locking the door is applied to the latch block 3 and latch rod 8, which are connected to each other via a connecting pin 12 and a locking pin 17.
and is supported as an internal force of the slider 2.

When the simple electric lock of the present invention operates as an electric lock, when an unlocking signal is generated, the solenoid 19 is energized for a certain period of time as shown in FIG.
is drawn into the solenoid 19. Therefore, the first drive lever 23 rotates clockwise against the elasticity of the torsion coil spring 25, and the drive pin 26 implanted at the other end rotates the second drive lever 27 clockwise, and so on. The end pushes the selector 16 downward against the elasticity of the selector spring 18. As a result, the selector pin 17 is completely pulled out from the locking hole 8b of the latch rod 8, and the engagement between the slider 2 and the latch rod 8 is released.

At the same time, as shown in FIG. 5, as the selector 16 descends, the lower end of the hold lever 36 comes off its notch 16e (see FIG. 2), rotates counterclockwise, and moves the selector's actuating arm. 16b (Figure 2)
The upper end of the hold lever 36 is stopped by the stopper pin 35, and the hold lever 36 stands upright. In this state, solenoid 19
Even if the power is cut off, the disengaged state between the slider 2 and the latch rod 8 is maintained, and the unlocking state described below continues, but as described above, the hold lever 36 is not in its original state. This hold lever 36 is not an essential component of the invention, but if power is supplied to the solenoid 19 for a few seconds after an unlocking signal is generated like a normal electric lock, and the unlocking operation is completed during that time, this hold lever 36 is not necessary. It is something.

As shown in FIG. 5, when the latch lever 8 is free with respect to the slider 2, for example, if you grasp a knob or the like and move it in the direction of opening the door,
Strike plate 9 fixed to the door frame as shown in the figure
However, when the lock box 1 is moved relatively downward, the opening edge of the latch insertion hole 11 pushes against the stop surface 3a of the latch block 3, causing it to rotate clockwise in FIG. do.

As a result, the latch block 3 rotates around the connecting pin 12, and its curved surface 3c moves rearward along an arc while slidingly contacting the latch block support parts 4, 4, so that the slider 2 is moved backwards from the latch spring 10. Pushed backwards against the elastic force. In this case, since the latch rod 8 and the slider 2 are disengaged as described above, their relative movement is free, and therefore the latch block 3 can be rotated as described above.

When the latch block is rotated by a certain angle, for example, as shown in FIG.
contacts the opening edge of the latch hole 7 (FIG. 1) on the indoor side, or if so designed (not shown), the front inclined edge of the latch rod 8 and the inclined inner surface 3f of the notch of the latch block. contact, and further rotation is prevented. After that, as is clear from FIG. 6, the locking surface 3a of the latch block
functions as a slope, and the latch input hole 1
As the door moves further in the opening direction, the slider 2 is pushed into the lockbox 1 integrally with the latch block 3 and the latch rod 8 due to the wedge action acting between the slider 2 and the opening edge on the outdoor side of the lockbox 1. Finally, the latch block 3 is completely detached from the strike plate and becomes free, and the door is completely unlatched to the door frame.

When the lower end of the upright hold lever 36 and the notch 16e (FIG. 2) of the selector 16 align with each other by moving the slider 2 inward, the selector spring 18 will move as shown in FIG. The selector 16 is pushed up by the elasticity. At this time, since the solenoid 19 is no longer energized, the selector 16 moves upward while pulling out the plunger 21 via the second drive lever 27, drive pin 26, and first drive lever 23. This upward movement continues until the selector pin 17 abuts the latch rod 8, as shown in FIG.

When the door is completely removed from the door frame and the latch block 3 becomes free, the elasticity of the latch spring 10 causes the latch block support parts 4, 4 of the slider to move against the curved surface part 3.
c is pushed outward, and the latch block 3 is rotated counterclockwise in FIG. 6 to return to the state shown in FIGS. 1 and 4. At this time, the selector pin 17 engages with the locking hole 8b of the latch rod due to the elasticity of the selector spring 18, and the latch rod 8 is locked with the slider 2 again.

When the door is closed, the slope 3b of the latch block performs the same function as the slope of a conventional latch bolt, causing the latch block 3, latch rod 8, and slider 2 to integrally move rearward against the elasticity of the latch spring 10, thereby locking the door. When the latch hole 7 of the box and the latch input hole 11 of the strike plate are aligned, the latch spring 10
The latch block 3 is automatically inserted into the latch insertion hole 11 by the elasticity of the latch, and locking is performed automatically in this way.

When the simple electric lock according to the present invention cannot function as an electric lock due to a power outage, etc., or when unlocking from the indoor side, use the duplicate key from the outside of the door.
Alternatively, the dead cam 29 is rotated clockwise from the indoor side using a thumb turn or the like as shown in FIG.

Then, the operating cam 29a rotates the third drive lever 33 counterclockwise, and as a result, one end of the third drive lever 33 rotates the second drive lever 27 clockwise in FIG. 8 via the drive pin 26. The other end of the second drive lever 27 pushes down the selector 16, and the slider 2 and latch rod 8 are rotated in the same manner as described above.
The lock is disengaged and becomes unlocked. Since the functions of the subsequent parts are the same as those described above, the explanation thereof will be omitted.

〔effect〕

As is clear from the above explanation, when unlocking an electric lock, the present invention does not directly move the locking member of the door, but simply moves the selector pin a small distance to engage the slider and latch rod. Since it is possible to solve this problem, the actuation force and actuation stroke of the electromagnetic actuator can be made extremely small. Therefore, a simple solenoid can be used as an electromagnetic actuator as in the illustrated embodiment.

In addition, for the same reason, the transmission mechanism between the locking mechanism and the electromagnetic actuator or dead cam can be simple and small, and a lock box that functions as both an electric lock and a cylinder lock device can be stored. This makes it easier. Therefore, the simple electric lock of the present invention has a simple structure and can function both as an electric lock and a cylinder lock as described above.

Furthermore, the door is unlocked by disengaging the slider from the latch rod and allowing the latch block to rotate, and after the latch block has rotated a certain amount,
Due to the wedge action between the blocking surface and the opening edge of the latch insertion hole, the latch block is pushed into the lock box as the door is opened, so that the locking member such as the latch block is pushed in when the door is opened. This has the effect of making the operation extremely smooth.

The latch device according to the illustrated embodiment also includes a first
As is clear from the figures and FIG. 2, the latch block and latch rod can be pulled out of the lock box by removing the front plate of the lock box and releasing the locking mechanism. After that, by changing the direction of the impact surface and inserting the latch rod through the slider again, the same latch device can be used for both inward-opening doors and outward-opening doors, as well as left-opening doors and right-opening doors. Another advantage arises in that it can also be applied to

[Other Examples]

It should be noted that the present invention is not limited to the illustrated embodiment, and can be implemented with various modifications.

For example, the locking mechanism in the illustrated embodiment has a locking hole opened in the latch rod and a selector pin implanted on one side of the support of the selector. A pin may be implanted (not shown).

Furthermore, in the illustrated embodiment, the selector pin is guided so as to be linearly movable in the slider. As the lever swings, the selector pin moves in the thickness direction of the latch rod so that it can move in and out of the locking hole (not shown), and the other end of the lever is operated by an electromagnetic actuator or dead cam. Good too.

Furthermore, it goes without saying that the electromagnetic actuator is not limited to a solenoid, and other electromagnetic actuators such as a small rotary solenoid can be used.

Furthermore, although the transmission mechanism between the locking mechanism and the electromagnetic actuator or dead cam in the illustrated embodiment is comprised of levers, it is of course possible to use other transmission mechanisms. In other words, the mechanical requirement that the operating piece of the selector or its equivalent be moved by a mechanical driving member such as an electromagnetic actuator or dead cam is common not only in locking devices but also in other devices.
There are too many transmission mechanisms commonly used for these, such as crank mechanisms, chain drive mechanisms, and cam mechanisms.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of a simple electric lock according to an embodiment of the present invention in its normal state, Fig. 2 is a perspective view showing the components of the locking member developed, and Fig. 3 is a latch block and latch lever. 4 is a partially sectional plan view showing the locking member of the simple electric lock in a normal state; FIG. 5 is a partially sectional side view similar to FIG. 1 showing the unlocked state by an electromagnetic actuator;
Fig. 6 is a partial cross-sectional plan view of the locking member in a state in which the latch block is rotated, Fig. 7 is a partial cross-sectional side view of the simple electric lock in a state in which the latch block is rotated, and Fig. 8 is a partial cross-sectional side view of the locking member in a state in which the latch block is rotated. FIG. 6 is a partially sectional side view similar to FIG. 5 showing a locked state; 1...Lock box, 2...Slider, 3...Latch block, 3a...Block surface, 3b...Slope, 3c...
...Curved surface part, 4...Latch block support part, 5...
Latch spring receiving plate, 8... Latch rod, 8b... Locking hole, 9... Strike plate, 10... Latch spring, 11... Latch insertion hole, 12... Connection pin,
15...Lock mechanism, 16...Selector, 17...
Selector pin, 18... Selector spring, 19...
Solenoid, 21... Plunger, 23... 1st
Drive lever, 26... Drive pin, 27... Second drive lever, 29... Dead cam, 33... Third drive lever.

Claims (1)

[Scope of utility model registration request] A slider is guided so as to be movable in the front and back direction perpendicular to the free edge of the door in the lockbox, and has a latch block support protruding from the front end of the free edge of the door and is biased forward. A latch rod supported and guided by the slider so as to be movable back and forth;
The horizontal cross section is approximately a right triangle, and the impact surface that engages with the opening edge of the latch input port of the strike plate fixed to the door frame to lock the door to the door frame is expected to be at a right angle to the above right triangle. , a slope obliquely intersecting the blocking surface in front of the stop surface, and a curved surface portion connected to the rear end of the slope so as to protrude rearward, and the corner portions sandwiching the right angle of the right triangle are latched. A latch block rotatably pivoted to the front end of the rod, a locking mechanism that is integrally attached to the slider and removably locks the latch rod to the slider, and a locking mechanism that is disposed inside the lock box and has an unlocking mechanism. An electromagnetic actuator controlled by a lock signal, a dead cam installed alongside the electromagnetic actuator in the lock box and driven by a cylinder lock attached to the door, and a locking mechanism connected to the electromagnetic actuator. , a first transmission mechanism that disengages the slider from the latch rod when the former is activated, and a second transmission mechanism that connects the dead cam and the locking mechanism and releases the engagement between the slider and the latch rod when the former is activated.
A transmission mechanism is provided, in which the curved surface portion of the latch block is in contact with the latch block support portion of the slider in a normal state in which the latch rod is locked to the slider via the locking mechanism and no external moment is applied to the latch block. A simple electric lock characterized by: