JPH044138Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electrically operated automatic door lock, and in particular, it is equipped with a rotation locking device and a rotation return device. When locking (closing the gate) or unlocking (opening the gate), they rotate relative to each other and protrude or retract into the inside and outside of the case, and one side edge of each locking tool and return tool has a The tips of the interlocking rods with coil springs wrapped around them are loosely connected, while the rear ends of each interlocking rod are installed behind the above-mentioned locking device and return device so as to cross each interlocking rod at right angles. The coil springs, which are passed through the guide holes of the guide support base and wound around each interlocking rod, apply rotating forces in opposite directions to the locking tool and the return tool, respectively, depending on the locked and unlocked states. At the same time, a plate spring is attached to one side of each support base, and the tips of the plate springs are in elastic contact with the peripheral surface of one side of the locking tool and the return tool, respectively, and each of the guide support bases is The present invention relates to an electric door lock that enables stable unlocking operation even with a weak force by applying spring pressure to the locking tool or the return tool in the direction of rotating the locking tool or the return tool as the locking tool rotates.

Conventionally, various types of electric door locks have been used, but a typical example is a single roller type rotating device that functions as a locking device and a return device, as shown in Figure 10. There is an electric door lock in which a moving tool a is provided and a spring b is attached to the rotating tool a so that a turning force acts only in the unlocking direction. This has the advantage that one rotating tool a can function as a locking tool and a return tool at the same time, but the spring b that is attached to the rotating tool a only moves in the direction of unlocking the rotating tool. Since pressure is applied, a large burden is placed on the latch piece (not shown) that locks the rotating tool a in order to keep the rotating tool a in the locked state. Therefore, when unlocking the door lock, a large amount of force is required to switch the latch piece to the unlocked state, resulting in an inconvenience that power consumption increases. Moreover, the door lock having such a structure operates with the rotating tool a always protruding to the outside of the door lock case c, regardless of whether it is locked or unlocked. If the door lock is stored inside the door body, the rotating tool a will always protrude outside the side of the door, making it impossible to close the door. In addition, a recess for accommodating the protruding portion, that is, a hooking hole must be provided in an exposed state, which is undesirable in terms of implementation. Therefore, such a door lock has no choice but to provide a mating metal fitting with a locking hole that engages with the rotating tool a, and to install it together with this metal fitting in an exposed state on the outside of the door. There was a problem that the exterior beauty of the door was impaired.

On the other hand, latch tablets described in Japanese Patent Publication No. 51-2880 and Japanese Utility Model Publication No. 51-22053 are known as having no such problems. All of these locks have the advantage of being relatively simple in structure, but have the disadvantage that the structural parts operate abruptly and lack smoothness when locking and unlocking.

An object of the present invention is to provide an electric door lock that eliminates the problems of conventional electric door locks as described above.

Another object of the present invention is to provide a rotational locking device and a rotational return device, and rotational forces in opposite directions are applied to the locking device and the return device relative to each other depending on the locked or unlocked state. To provide an electric door capable of releasing a locked state with an extremely weak force, thereby saving power consumption and extending the service life of a battery. There is a particular thing.

Another object of the present invention is to provide a rotation locking device and a rotation return device, respectively, and the locking device and the return device relatively move in and out of the case when locking or unlocking the case. By doing this, the door lock can be easily stored and installed inside the door body, improving its appearance, and the electric door lock can also be used with existing mechanical locking devices. It is about providing.

Another object of the present invention is to firmly lock the locking surface of the locking device when the locking device is in a protruding position in the locked state, and to lock the door when attempting to unlock the door. To provide an electric door lock capable of surely and stably locking and unlocking operations by providing a locking piece so as to be quickly and reliably released from a locking surface of a tool.

Another object of the present invention is to provide a lock release device that can fix the above-mentioned lock piece in the unlocked position by a simple manual operation, thereby preventing the door lock from locking and allowing the door to be kept unlocked at any time. To provide an electric door lock which allows the door to be opened and closed freely when necessary by maintaining the lock.

Another object of the present invention is to provide an automatic unlocking device that can automatically release the locked state of the above-mentioned locking piece by an electric signal, so that the door can be locked automatically or automatically as needed. To provide an electric door lock which is convenient in use by being manually unlocked.

Other objects and features of the present invention will be more clearly understood from the embodiments described below.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and effects of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

FIG. 1 is a perspective view schematically showing the overall structure of the present invention, in which two pivot locks 2 each having a quarter-circular shape and one pivot lock on one side end surface of a case 1 are shown. The rotation return tool 3 is rotatably mounted on respective support shafts 2a and 3a protruding from an intermediate corner thereof, and
A restoring tool 3 is provided between both of the locking tools 2 so as to face each other at opposite positions, and a recess is provided in one side edge of each of the locking tools 2 and the restoring tool 3. The sinkholes 2b and 3b are provided with external coil springs 6,
Insert the tips 4a and 5a of the interlocking rods 4 and 5 for locking and return, respectively, wrapped around pin shaft 4.
b, 5b, and the rear ends of the interlocking rods 4, 5 are connected to guide holes 8a, 9 of a pair of guide supports 8, 9 for locking and return, which are arranged in parallel in a direction perpendicular to the interlocking rods 4, 5.
Penetrate with a. The guide supports 8 and 9 are pivoted so as to be rotated by pin shafts 8b and 9b formed at both ends thereof, and one side of each of the support stands 8 and 9 has locking and return pins, respectively. Plate spring 1 for
0 and 11 are fixed with fixing bolts 12 and 13, while the tips 10 of the plate springs 10 and 11 are fixed.
a and 11a are extended to a position that reaches the corner of one side of the outer peripheral surface of the locking tool 2 and the return tool 3, respectively, so that when the support stands 8 and 9 rotate, the plate springs 10 and 1
The tips 10a, 11a of the locking tool 2 and the return tool 3 are configured to apply rotational pressure to the locking tool 2 and the return tool 3, and on one rear side of the locking tool 2, there is provided a supporting wing piece 1 with both sides bent.
The two hooking pieces 14 formed with 4a are attached to their tips 14.
b is placed in a position where it can be latched to the latching piece 2c of the corresponding latching tool 2, and the support wing piece 14a of each latching piece 14 is
are each pivoted by a shaft 15, and the locking piece 14 is rotated about the shaft 15 as a central axis.
In order to brake the locking piece 14, a protrusion 17a that can press the side surface of the locking piece 14 and a protruding wing piece 17b to which the outer peripheral surface of the locking tool 2 is slidably connected are formed at the tip, and a spring support piece is formed on the rear side. 17d is bent and formed, and a hook flange 17c is formed at the rear end, and the brake rods 17, 1 are connected as a series by a connecting portion 17e.
The tips of 7 are each mounted on the shaft rod 15,
The shaft rod 15 has two first and second springs 1.
6 and 18 are made into a spiral, one end 16a of one spring 16 is resiliently stopped on the side surface of the hooking piece 14, and the other end 16
b is elastically retained by the spring support piece 17d, while one end 18a of the other spring 18 is elastically retained by the spring support piece 17d, and the other end 18b
is resiliently held against the side surface 1c of the case, so that the latching piece 14 is rotated in the direction in which the latching surface 2c of the locking tool 2 is to be latched, and the side surface of the latching piece 14 is hooked on the protrusion 17a of the brake rod 17, and the brake rod 17, by means of the spring 18, rotates the locking piece 14 in the direction in which it is removed from the locking surface 2c of the locking tool 2.

On the other hand, the brake rod 1 on which the hooking collar 17c is formed
A magnet core 20 around which an excitation coil 19 is wound is provided at the rear end of the magnet 7.
A suction piece 22 is loosely attached to the tip of the magnetized iron 21 with a spring 23, and the magnet
When the core 20 is not energized, the suction piece 22 is advanced toward the brake rod 17 by the spring 23, and the tip of the suction piece 22 is caught on the catch flange 17c of the brake rod 17, and the magnetic core 20 is energized. When this is done, the suction piece 22 is moved backward by the magnetic force and is removed from the hook flange 17c of the brake rod 17.

Incidentally, near one side of the magnet core 20, a circular tube 24 having a longitudinal elongated hole 24a penetrating the intermediate peripheral wall is supported by a fixed support 25 parallel to the excitation coil 19. Inside the tube 24, as shown in FIG. 4, there is a floating rod 26 with a longitudinal elongated hole 26a bored in the middle part, and a coil spring 27 that applies forward pressure to the floating rod 26. A protruding rod 26b is protruded from one circumferential wall of the distal end of the floating rod 26, and the distal end of the protruding rod 26b is connected to a guide hole 24b bored in one circumferential wall of the distal end of the circular tube 24. Protrude to the floating rod 2
When the housing 6 retreats, the suction piece 22 is pushed to make it retreat, and a manual unlocking button 28 is inserted into the hole 1b bored in the side surface 1a of the case at a position corresponding to the elongated hole 24a of the circular tube 24.・Spring 29
A rod 30 having an inclined surface 30a is integrally provided on this manual unlocking button 28, and this rod 30 is connected to the elongated hole 24a of the circular tube 24. It protrudes into the long hole 26a of the floating rod 26.

In addition, two lock release levers are provided on both upper and lower surfaces of the interior of the case 1, each of which has a tip 31a inserted between the supporting wing piece 14a of the latch piece 14 and the side surface 1c of the case. 31 is provided so that it can move forward and backward. This double lock release lever 31, 31
The shafts 32a at both ends are loosely connected to a connecting rod 32 that is loosely attached to the inner wall of the case 1, and another connecting shaft 32b provided separately, and the lock is attached to one of the locking and releasing levers 31. The structure is such that both lock release levers 31, 31 are operated together by operating the release operation lever 33.

In the drawing, unexplained code 34 indicates a door frame, and 35
3 indicates a hooking hole formed in the door frame, 36 indicates a power source for the excitation coil 19, and 37 indicates a power on/off switch.

The operating state of the present invention constructed as above will be described below.

As mentioned above, in the door lock of the present invention, the locking tool 2 and the return tool 3 are installed opposite each other by the support shafts 2a and 3a, so that when the door is closed, the door lock shown in FIG. As shown, the locking tool 2 is projected to the outside of the case 1 and is hooked to the locking hole 35 in the door frame, while the return tool 3 is recessed inside the case 1. At this time, the locking tool 2 has an interlocking rod 4 loosely attached thereto, which is supported by a coil spring on the support shaft 2a.
Since the locking tool 2 receives a clockwise spring pressure centering on the locking hole 35, the locking tool 2 remains locked in the locking hole 35.

At this time, when the door is opened in the direction of arrow C in FIG. It rotates counterclockwise around the support shaft 2a and enters the case 1, and at the same time, the interlocking rod 4
begins to rotate while being pushed backwards, and when its axis crosses the center line of the support shaft 2a and deviates in the opposite direction, counterclockwise spring pressure is applied to the locking tool 2, so that the locking tool 2 rotates rapidly.

On the other hand, when the guide support base 8 rotates clockwise as the interlocking rod 4 rotates, the tip of the plate spring 10 attached to the side surface applies pressure to one corner of the return tool 3, causing the return tool 3 to move. It is projected outside the case 1.

Therefore, when the door is completely opened, it is completely immersed inside the case 1 and the return tool 3 is projected to the outside of the case 1, as shown in FIG. 6c. At this time, the locking tool 2 and the returning tool 3 are firmly maintained in the retracted and protruded states by the pressure of the coil springs 6 and 7 of the interlocking rods 4 and 5, respectively.

On the other hand, as shown in FIGS. 7a, b, and c, when the door is closed again, the return tool 3 is retracted by the opposite action to that described above, and the locking tool 2 is pushed out again into the locking hole 35. It is suspended.

Furthermore, when the door lock of the present invention is used in a locked state, if the lock release lever 33 is pushed in the direction of arrow D in FIG. 8a, the lock release lever 31 is separated from the lock piece 14. Therefore, the latch piece 14 is applied with a clockwise rotational force by the spring 16, and when the door is closed, the tip 14b of the latch piece 14 is in the locked position. Since the locking surface 2c of the tool 2 can be locked at any time, the door is locked as soon as the door is closed.

However, on the contrary, the lock/unlock operation lever 33 is
If the lock release lever 31 is pushed in the direction of arrow E, the lock release lever 31 moves forward and its tip 31a forcibly pushes up the support wing piece 14a of the lock piece 14, so the lock release lever 31 moves forward. Since it is rotated counterclockwise and the tip 14b cannot engage the locking surface 2c of the locking tool 2, the locking tool 2 is in an unlocked state.

Therefore, if the door is used in this condition, it can be prevented from being automatically locked every time the door is closed, and unnecessary locking can be prevented.

Next, the operation of unlocking a locked door using an automatic or manual unlocking device will be explained as shown in Figure 9a.
As shown in FIG. 3, in the locked state, the suction piece 22 is resiliently held toward the brake rod 17 by the force of the spring 23, and the hooking flange 17c of the brake rod 17 is held at the tip of the suction piece 22. As a result, the braking rod 17 cannot be rotated regardless of the pressure of the spring 18, and as a result, the braking action on the latch piece 14 cannot be released, and the latch piece 14 becomes The door cannot be opened because the locking tool 2 is locked.

At this time, when the power on/off switch 37 is pressed to apply current to the excitation coil 19, the magnet core 2
Since the suction piece 22 is attracted to the core 20 and retreated by the magnetic force of 0, the hook flange 17 of the brake rod 17
It will be removed from c.

In this case, the brake rod 17 is in a free state, so the force of the spring 18 is applied to the shaft rod 15.
While rotating counterclockwise around the center, the tip projection 17a applies pressure to the locking piece 14 from the side. Therefore, the locking piece 14 is connected to the locking tool 2.
It comes off the locking surface 2c and becomes unlocked.

Therefore, when the door is opened at this time, the locking tool 2 rotates counterclockwise and becomes the state shown in FIG. When the brake rod 17 is rotated clockwise by pushing the protruding wing piece 17b of 17, the tip of the suction piece 22 will be caught again by the catch collar 17c.

When the locking tool 2 rotates counterclockwise, the return tool 3 protrudes as described above to open the door, and when the door is closed again, the locking tool 2 is locked by the locking piece 14.

On the other hand, when attempting to manually unlock the locked state, by pushing the manual unlock button 28 in the direction of the arrow F in FIG. Since the floating rod 26 is moved backward while sliding toward the side edge, the protruding rod 26b at the tip of the floating rod 26 moves the suction piece 22 backward, and by operating in this manner, the manual unlocking button 28 is pressed once. The lock can be unlocked using the same action as when automatically unlocking the door electrically.

As described above, in the present invention, the spring wrapped around the interlocking rod of the lock applies elastic force to the lock in the protruding direction when the lock is protruded, and in the retracting direction when the lock is retracted. By doing this, the latching surface of the locking device does not apply any force to the latching piece from the locked state, so the latching piece can be released by a weak electromagnetic force, reducing power consumption. reduce,
It has the advantage of being able to operate even with small dry batteries.

In addition, the present invention uses a separate locking device and return device, and uses a guide support and a plate spring to configure the locking device and return device, thereby eliminating the need for conventional roller-type rotation. When a moving tool is used, a part of the rotating tool always protrudes outside the case during the door opening and closing process, so the locking device must be installed exposed on the outside of the door as described above. In addition to solving the problem of deteriorating the appearance, the locking tool and the return tool are housed inside the case, and only when activated, they are moved from the front of the case to the door frame. In addition, the locking tool is placed above and below the restoring tool in parallel with the operating mechanism, making it possible to reduce the thickness of the case. By connecting two locking devices to each other as in the present invention, the door lock can be reliably locked and unlocked, and the return tool can apply rotational force in the opposite direction to the locking device. They act relatively, and therefore, a smoother locking and unlocking feeling can be obtained compared to those described in each of the above-mentioned publications. Therefore, it is suitable for heavy and precise high-grade doors.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the overall structure of the door lock according to the present invention, Fig. 2 is a partial perspective view of the door lock according to the invention shown in Fig. 1, and Fig. 3 is an outside view of the case of the door lock according to the invention. A side view showing a part of the plate cut away, Fig. 4 is a cross-sectional view taken along line A-A in Fig. 3, Fig. 5 is a cross-sectional view taken along line B-B in Fig. 3, and Fig. 6 is a closed view. FIG. 4 is a partial cross-sectional view sequentially showing the operating states of the locking tool and the return tool of the door lock according to the present invention in the process of changing to the door state; Fig. 2 shows a state in which the return tool is retracted, b shows a state in which the locking tool is retracted and the return tool is protruded during the door opening process, and c shows a state in which the locking tool is retracted and unlocked with the door open and the return tool is ejected. FIG. 7 is a partial cross-sectional view sequentially showing the operating states of the locking device and return device of the door lock according to the present invention in the process of changing from the open door state to the closed door state, in which a is a Fig. 2 shows a state in which the locking tool is retracted and the return tool protrudes when the door is in the state of the door, b shows a state in which the locking tool protrudes and the return tool retracts during the door closing process, and c shows a state in which the locking tool protrudes and hangs when the door is closed. FIG. 8 is a partial cross-sectional view showing the configuration and operating state of the locking and unlocking device for door locks according to the present invention, and FIG. 9 is a cross-sectional view showing the locked state before locking, b is a cross-sectional view when the locking release lever is operated and the door is unlocked, and FIG. 9 is the operation of the manual or automatic door unlocking device according to the present invention. A partial cross-sectional view showing the state, where a is a cross-sectional view of the locked state before pressing the manual or automatic unlock button, b
10 is a sectional view of the door unlocked manually or by pressing the unlock button, and FIG. 10 is a perspective view of a conventional electric door lock. 1...Box body, 2...Latching tool, 3...Return tool, 2
a, 3a... Support shaft, 4, 5... Interlocking rod, 6, 7...
...Coil spring, 8,9...Guide support stand,
8a, 9a... Guide hole, 10, 11... Plate spring, 10a, 11a... Plate spring tip, 1
4...Latching piece, 15... Axis rod, 16... Spring, 17... Brake rod, 17a... Protrusion, 17b...
...Protruding wing piece, 17c...Hatch collar, 17d...Spring support piece, 17e...Connection part, 18...Spring, 22...Sucking piece, 23...Spring, 24...Circular tube, 26... ...Flying rod, 24a,
26a...Elongated hole, 26b...Protruding rod, 28...Manual unlock button, 30...Stand, 30a...Slanted surface,
31... Lock release lever, 32... Connection rod, 33
...Lock release operation lever.

Claims (1)

[Scope of utility model registration request] A locking tool 2 and a return tool 3, which are rotatably mounted on the front part of the case 1 with respective support shafts 2a and 3a, are arranged vertically in parallel, and a coil is attached to the locking tool 2 and the return tool 3. One end of interlocking rods 4 and 5 for locking and return, around which springs 6 and 7 are wound, is rotatably supported, and the other ends of the interlocking rods 4 and 5 are provided with corresponding locking and return rods. Tips 1 of plate springs 10 and 11 for locking and return, one end of which is fixed to the side surface of guide support stands 8 and 9 for return.
0a and 11a are extended to a position where they can reach the outer peripheral surfaces of the locking tool 2 and the return tool 3, and the locking tool 2
On the rear side, a locking piece 14 capable of locking the locking surface 2c of the locking tool 2 and a brake rod 17 configured to brake the locking piece 14 are mounted on a coaxial rod 15. The first and second springs 1 are mounted on the shaft.
6 and 18 apply rotational force in opposite directions so that the rear end hooking collar of the brake rod 17 is hooked on the suction piece 22 driven by an electromagnet, and a suction piece is attached to one side of the electromagnet. A manual unlocking device capable of driving the locking member 2 is provided, and locking release levers 31, 31 are provided on the rear side of the locking piece 14 so as to be movable back and forth, and the interlocking rod 4 of the locking device 2 is such that the spring 6 wound around it exerts a rotational force on the locking tool 2 in the protruding direction when the locking tool 2 projects outside the case 1, and in the retracting direction when the locking tool 2 is retracted into the inside of the case 1. The guide supports 8 and 9 are provided perpendicularly to the interlocking rods 4 and 5 of the locking tool 2 and the return tool 3, respectively. Corresponding to the movement of the interlocking rods 4 and 5, the pin shafts 8a and 9a at both ends of the interlocking rods rotate as support shafts, and accordingly, the plate spring 1
0 and 11 operate the corresponding locking tool 2 or return tool 3, and the locking piece 14
is prevented from rotating in the direction of latching the latching surface 2c of the latching tool 2 by the first spring 16, and the braking rod 1
The locking piece 14 is prevented from rotating in the direction in which the locking piece 14 comes off from the locking surface 2c of the locking tool 2 by a second spring 18.
The manual unlocking device has a floating rod 2 inside the circular tube 24, and the manual unlocking device has a floating rod 2 inside the circular tube 24.
6 is elastically loaded with a spring 27, and elongated holes 26a, 2 are bored in the intermediate part between the floating rod 26 and the circular tube 24.
4a, a rod 30 integrally formed on the bottom surface of the manual unlocking button 28 and having an inclined surface 30a on one side is inserted, and a protruding rod 26b is inserted into the tip of the floating rod 26 through the guide hole 24b of the circular tube 24. When the manual unlock button 28 is pressed, the protruding rod 26b engages the suction piece 2.
Further, the lock release lever 31 has a distal end 31a that is connected to the locking piece 14.
The supporting wings 14a are formed to be pushed open, and are loosely attached to the inner wall of the case 1 by a connecting rod 32 with both ends loosely attached, so that the upper and lower lock release levers 31 are interlocked. An electric door lock in which a lock release operation rod 33 is erected on a lock release lever 31.