AUTOMATICALLY RESETTABLE PASSIVE SWING-BAR LOCK

Abstract

An automatically resettable passive swing bolt lock comprising a lock body (1) and a key (2), wherein the key (2) can be inserted into a locking hole of the lock body (1); wherein the lock body (1) comprises a lock housing (11), a rotary compartment (12), a locking cover (13), a return spring (14), a pin spring (15), a pin (16), a lock body PCB (110), a motor (18), a cam (19), a return pusher (17), and two closing contacts (113); the locking cover (13) is strapped onto the rotary compartment (12); an inner cavity of the rotary compartment (12) is formed between the locking cover (13) and the rotary compartment (12); the rotary compartment (12) with the locking cover (13) is rotatably inserted into the lock housing (11); an outer end of the rotary compartment (12) has two conductive holes (121); the cam (19) is firmly secured on an output shaft of the motor (18);the motor (18) is fixedly installed in the inner cavity of the rotary compartment (12); the two closing contacts (113) are movably mounted in the two conductive holes (121) of the rotary compartment (12); the outer ends of the closing contacts (113) are provided opposite a keyhole of the lock housing (11); the inner ends of the closing contacts (113) are electrically connected to the motor (18); the reset pusher (17) is movably provided in the inner cavity of the rotary compartment (12) so as to be able to move back and forth in the longitudinal direction; the surface of the outer end of the reset pusher (17) faces the keyhole of the lock housing (11); an inner end of the reset pusher 17 is movably attached to the cam (19); the return spring (14) is mounted between the reset pusher (17) and the wall of the inner cavity of the rotary compartment (12); an upper part of the pin (16) is movably attached to the closure cover (13) along a transverse direction;a lower end of the pin (16) abuts the cam (19); the pin spring (15) is fitted onto the pin (16); two ends of the pin spring (15) lean against the closure cover (13) and the cam (19), respectively; the lock body PCB (110) is mounted in the inner cavity of the rotary compartment (12); the lock body PCB (110) is electrically connected to the motor (18) and the closing contacts (113);

Description

The present invention relates to a lock, in particular an automatically resettable passive swing latch lock.Prior ArtWith the improvement of the economic level, electronic locks are widely used in homes, hotels, companies, public facilities, and other places. The passive lock technique is further improved. However, the prior art passive locks have the following deficiencies: (1) the prior art passive locks are impractical to lock; (2) the prior art passive locks are large, consume a lot of power, and require a high motor power; (3) the prior art passive locks must be reset by turning on the motor; (4) the prior art passive locks are complex in structure, cost, and power requirements for various parts are high.From CN 108 915 377 A a passive lock body is known comprising a lock core body, a lock piece arranged on the lock core body for engaging with the lock body and a control mechanism for controlling the lock piece to cooperate with the lock body. Here, the control mechanism includes a motor, a cam disposed on the motor shaft of the motor, and a cam positioning member for cooperatively engaging the cam to selectively limit the circumferential direction of the cam. Furthermore, U.S. Pat. No. 6,615,625 B2 discloses an electronic locking system comprising: (a) a cylinder which is accommodated in a casing and is rotatable relative thereto; (b) a key; (c) at least one of the key and the cylinder being capable of outputting a signal when the key is electrically connected to the cylinder; (d) an electrically driven locking mechanism in the cylinder having a locking member which is movable from an open position to a closed position, wherein the locking member, in the closed position, inhibits the rotation of the cylinder relative to the casing. The known closing system comprises an anti-engagement mechanism movable upon longitudinal movement of said cylinder to impede the movement of the closing member from the closed position.Object of the InventionThe main object of the present invention is to provide an automatically resettable and passive lock lock, which is simple in construction and which provides good safety.In order to achieve the above object, the present invention uses the following technical solutions.An automatically resettable passive swing latch lock comprises a lock body and a key. The key may be inserted into a locking hole of the lock body.The lock body includes a lock housing, a rotating compartment, a lock cover, a return spring, a pin spring, a pin, a lock body PCB, a motor, a cam, a return pusher, a steel ball, two lock contacts, and a ground conductor. The closure cover is bent onto the turning box. Between the closure cover and the turning compartment, an inner cavity of the turning compartment is formed. The rotating compartment with the closure cover are rotatably mounted in the lock housing. An outer end of the rotating tray has two conductive holes. The cam is fixedly secured to an output shaft of the motor. The motor is fixedly mounted in the interior cavity of the rotating compartment. The two closure contacts are movably provided in the conductive holes of the rotating compartment. The outer ends of the lock contacts are provided opposite a keyhole of the lock housing. The inner ends of the close contacts are electrically connected to the motor. The reset pusher is movably provided in the inner cavity of the turning tray to be longitudinally reciprocable. An outer end face of the reset trigger is located opposite the keyhole of the lock housing. An inner end of the reset trigger is movably mounted on the cam. The return spring is mounted between the return pusher and a wall of the interior cavity of the turning tray. An upper part of the pin is movably attached to the closure cap along a transverse direction. A lower end of the pin abuts the cam. The pin spring is plugged onto the pin. Two ends of the pin spring rest against the closure cover or the cam. The steel ball is movably provided in the inner cavity of the turning tray, the steel ball being disposed on a side wall of the keyhole of the turning tray. The lock body PCB and the ground conductor are mounted in the inner cavity of the turning tray. The lock body PCB is electrically connected to the motor and the lock contacts. The ground conductor is in contact with the reset button.The cam is composed of a cam body, a cam shaft block, a cam limiting block, a cam slant surface, a cylindrical cam surface, and a cam arc groove. The cam limiting block extends outwardly from an outer end of the cam body. The cam arc groove is formed on an outer wall of the cam body. The camshaft block extends outwardly from a sidewall of the cam body. The cam slant surface is formed at an inner end of the cam body. The cylindrical cam surface protrudes from the cam inclined surface.The reset presser is formed in an L-shape. The L-shaped member has a vertical portion. An inner side wall of the vertical portion includes an arcuate sleeve. The arcuate sleeve has an inclined face which mates with the cylindrical cam surface of the cam.The automatically resettable passive latch lock further includes a mounting plate, a tongue, and a nut. The mounting plate is disposed in the interior cavity of the rotating compartment. The fixing plate is movably provided at an outer end of the pin. The tongue is fixedly secured to an inner end of the rotating tray by the nut.The key is composed of a key housing, a key head, a lead plate, two return pins, a ground spring, a battery, a resilient ground plate, a resilient electrode plate, and a key PCB. The key head is fixed to a front end of the key housing. A front end of the key head has a steel ball groove for receiving the steel ball in the lock body therein. The guide plate is movably mounted in the key head. The return pins are movably inserted into the guide holes of the key head. The grounding spring is mounted on the respective return pin. Two ends of the ground spring each press a flange of the respective return pin and the key housing to generate a spring force with which the respective return pin is pushed outward. The battery is mounted in the key housing. The resilient ground plate and the resilient electrode plate are attached to an inner wall of the key housing. The resilient ground plate and the resilient electrode plate each come into contact with one of the two electrodes of the battery and are electrically connected to the key PCB and the two return pins via cables.After applying the above solutions, the lock body of the present invention comprises a lock housing, a turning box, a lock cover, a return spring, a pin spring, a pin, a lock body PCB, a motor, a cam, a return pusher, a steel ball, two lock contacts, and a ground conductor. The rotating compartment is mounted in the lock housing. The lock body PCB, the motor, and the cam are mounted in the inner cavity of the rotating tray formed between the closure cover and the rotating tray. The advantages are the small size, the simple construction and the low power consumption of the motor.The embodiments of the present invention will be described below by way of example only with reference to the accompanying drawings.List of FiguresFIG. 1 is a perspective view of the present invention; FIG. 2 is an exploded view of the present invention; FIG. 3 is a cross-sectional view of the present invention in a locked state; FIG. 4 is a side view of the present invention in a locked state; FIG. 5 shows a cross-sectional view of the present invention in an unlocked state; FIG. 6 is a side view of the present invention in an unlocked state; FIG. 7 is a perspective view of the reset trigger of the present invention; FIG. 8 is a perspective view of the cam of the present invention; and Figure 9 shows an exploded view of the key of the present invention.WAYS OF CARRYING OUT THE INVENTIONFIG. 1 shows that the present invention shows an automatically resettable passive swivel lock lock which consists of a lock body 1 and a key 2. The key 2 can be inserted into a locking hole of the lock body 1.FIGS. 2 to 6 show that the lock body 1 includes a lock housing 11, a turning tray 12, a lock cover 13, a return spring 14, a pin spring 15, a pin 16, a return presser 17, a motor 18, a cam 19, a lock body PCB 110, a fixing plate 111, a steel ball 112, two lock contacts 113, a ground conductor 114, a tongue 115, and a nut 116.The closure cover 13 is bent onto the turning compartment 12. Between the closure cover 13 and the turning compartment 12 an inner cavity of the turning compartment is formed. The turning box 12 is rotatably installed in the lock housing 11 with the closure cover 13. The outer end of the turning tray 12 has two conductive holes 121. The cam 19 is fixedly secured to an output shaft of the motor 18. The motor 18 is fixedly mounted in the interior cavity of the rotating tray 12. The two close contacts 113 are movably mounted in the two conductive holes 121 of the rotating tray 12. The outer ends of the lock contacts 113 are disposed opposite to a keyhole of the lock housing 11. The inner ends of the close contacts 113 are electrically connected to the motor 18. The return pusher 17 is movably provided in the inner cavity of the turning tray 12 to be longitudinally reciprocable. The outer end surface is provided opposite to the keyhole of the lock housing 11. The inner end of the return pusher 17 is movably mounted on the cam 19. The return spring 14 is mounted between the return pusher 17 and the wall of the internal cavity of the turning tray 12.The upper part of the pin 16 is movably attached to the closure cap 13 along a transverse direction. The lower end of the pin 16 abuts the cam 19. The pin spring 15 is mounted on the pin 16. Two ends of the pin spring 15 abut against the closure cover 13 and the cam 19, respectively. The steel ball 112 is movably provided in the inner cavity of the turning tray 12, and the steel ball 112 is disposed on the side wall of the keyhole of the turning tray 12. The lock body PCB 110 and the lock contact 113 are mounted in the inner cavity of the turning tray 12. The lock body PCB 110 is electrically connected to the motor 18 and the lock contacts 113. The ground conductor 114 is in contact with the reset presser 17. The fixing plate 111 is provided in the inner cavity of the turning tray 12. The fixing plate 111 is movably fitted on the outer end of the pin 16. The tongue is firmly secured to the inner end of the turning tray 12 by the nut 116.It should be noted that the ground conductor 114 may be wired in various ways as long as the key 2 is inserted so as to form a loop with the lock body PCB 110. This can be connected, for example, via a printed circuit board to the lock housing 11 which is in contact with the key 2. Alternatively, the reset presser 17 has an inclination. Only when the key 2 is inserted does the reset presser 17 have to be in contact with the ground conductor 114, but not always.FIG. 8 shows that the cam 19 includes a cam body 191, a cam shaft block 192, a cam limiting block 193, a cam slant surface 194, a cylindrical cam surface 195, and has a cam arc groove 196. The cam limiting block 193 extends outwardly from the outer end of the cam body 191. The cam arc groove 196 is formed on the outer wall of the cam body 191. The cam block 192 extends outwardly from the side wall of the cam body 191. The cam slant surface 194 is formed at the inner end of the cam body 191. The cylindrical cam surface 195 protrudes inwardly from the cam inclined surface 194.FIG. 7 shows that the reset presser 17 is formed in an L-shape. The L-shaped member has a vertical portion 171. The inner side wall of the vertical portion 171 has an arcuate sleeve 172. The arcuate sleeve 172 has an inclined face 173. This inclined face 173 of the arcuate sleeve 172 cooperates with the cam arcuate groove 196 of the cam 19 to engage or disengage.As shown in FIG. 9, the key 2 is composed of a key housing 21, a key head 22, a lead plate 23, two return pins 24, a ground spring 25, a battery 26, a resilient ground plate 27, a resilient electrode plate 28, and a key PCB 29. The key head 22 is fixed to the front end of the key housing 21. The front end of the key head 22 has a steel ball groove 221 for receiving the steel ball 112 in the lock body 1 therein. The guide plate 23 is movably mounted in the key head 22. The return pins 24 are movably inserted into the key holes of the key head 22. The grounding spring 25 is plugged onto the respective return pin 24. Two ends of the ground spring 25 each press a flange 241 of the return pin 24 and the key housing 21 to generate a spring force with which the respective return pin 24 is pushed outward. The battery 26 is mounted in the key housing 21. The resilient grounding plate 27 and the resilient electrode plate 28 are attached to the inner wall of the key housing 21. The resilient ground plate 27 and the resilient electrode plate 28 are each in contact with one of the two electrodes of the battery 26 and electrically connected to the key PCB 29 and the two return pins 24 via cables.The key housing 21 is composed of an upper key cover 211, a lower key cover 212 and a cover body 213. The upper key cover 211 and the lower key cover 212 are fixed to the top and bottom of the cover body 213, respectively.The operation principle of the present invention will be described below.When the key 2 is inserted into the lock body 1, the reset lever 17 is pushed with the key head 22 to connect the ground terminal. The ground conductor 114 is always in contact with the reset presser 17. While the reset presser 17 is pressed in, the return pins 24 of the key 2 abut on the locking contacts 113 of the lock body 1. When the reset presser 17 is in place, the inclined face 173 of the arcuate sleeve 172 of the reset presser 17 is separated from the cam slant surface 194 of the cam 19 to cancel the restriction. After the signal transmission, the key 2 supplies the lock body 1 with power and drives the motor 18. After the motor 18 drives the cam 19 to 90-degree rotation, the cam limiting block 193 is limited by a limiting surface 123 of the turning tray 12 while the cam arc groove 196 of the cam 19 is aligned with the pin 16 so that the pin 16 is not limited. At this time, the key 2 is rotated to drive the turning tray 12. The pin 16 can be freely displaced to the axis due to the lack of limitation of the cam 19. As the turning tray 12 rotates, the head of the pin 16 is slid in the arcuate groove on the inner wall of the lock housing 11 to move the pin 16 toward the axis, thereby releasing the rotational restriction within the lock and unlocking the lock. When the key 2 is inserted, the steel ball 112 slides into the steel ball groove 221 of the key head 22, and after the key 2 is rotated, the steel ball 112 is locked into the steel ball groove 221 so that the key 2 can be pulled out. When the key 2 is turned back to the original position, the pin 16 is returned with the pin spring 15, the steel ball 112 is not restricted, and the key 2 can be pulled out. The return pusher 17 is returned by the return spring 14 when the key 2 is pulled out. The inclined face 173 of the return pusher 17 cooperates with the cam slant surface 194 of the cam 19 to return the cam 19. After the return of the cam 19, the pin 16 is limited and the lock locked. The arcuate sleeve 172 of the return pusher 17 is provided with the cylindrical cam surface 195 of the cam 19 to ensure that the center of the inclined face 173 of the return pusher 17 coincides with the axis of the cam 19. The inner end face of the cam 19 coincides with the vertical portion 171 of the return printer 17 to ensure that the cam 19 is not tilted due to the matching relationship between the elastic force of the return spring 14 and the inclined end face 173. The camshaft block 192 cooperates with the limiting surface 123 of the rotating tray 12 to prevent the motor 18 from being rotated improperly and not unlocked. A tray surface 122 cooperates with the peripheral surface of the motor 4 to prevent the pin 16 from abutting the cam 19 and displacing the cam 19 upon severe rotation of the tray 12, resulting in false locking.List of reference characters1 Lock body 2 Key 11 Lock housing 12 Turning box 13 Lock cover 14 Return spring 15 Pin spring 16 Pin 17 Return pusher 18 Motor 19 Cam 110 Lock body 111 Fixing plate 112 Steel ball 113 Lock contact 114 Grounding conductor 115 Tongue 116 Nut 171 Vertical portion 172 Arc-shaped sleeve 173 Inclined face 191 Cam body 192 Cam shaft block 193 Cam limiting block 194 Cam slant surface 195 Cylindrical cam surface 196 Cam arc groove 21 Key housing 22 Key head 23 Guide plate 24 Return pin 25 Grounding spring 26 Battery 27 Resilient grounding plate 28 Resilient electrode plate 29 Key PCB 211 Key top cover 212 Key bottom cover 213 Cover body 221 Steel ball groove

Claims

An automatically resettable passive swing latch lock comprising a lock body (1) and a key (2), wherein the key (2) is insertable into a locking hole of the lock body (1); wherein the lock body (1) comprises a lock housing (11), a rotating compartment (12), a lock cover (13), a return spring (14), a pin spring (15), a pin (16), a lock body PCB (110), a motor (18), a cam (19), a reset presser (17), and two lock contacts (113); the lock cover (13) is bent onto the rotating compartment (12); an inner cavity of the rotating compartment (12) is formed between the lock cover (13) and the rotating compartment (12); the rotating compartment (12) with the lock cover (13) rotatably inserted in the lock housing (11); an outer end of the rotating compartment (12) has two conductive holes (121); the cam (19) is fixedly secured to an output shaft of the motor (18); the motor (18) is fixedly installed in the inner cavity of the rotating compartment (12); the two lock contacts (113) are movably mounted in the two conductive holes (121) of the rotating compartment (12); the outer ends of the lock contacts (113) are provided opposite to a key hole of the lock housing (11); the inner ends of the lock contacts (113) are electrically connected to the motor (18); the reset presser (17) is movably provided in the inner cavity of the rotating compartment (12) to be longitudinally reciprocable; the surface of the outer end of the reset pusher (17) faces the keyhole of the lock housing (11); an inner end of the reset pusher 17 is movably mounted on the cam (19); the reset spring (14) is mounted between the reset pusher (17) and the wall of the inner cavity of the rotating compartment (12); an upper part of the pin (16) is movably mounted on the lock cover (13) along a transverse direction; a lower end of the pin (16) abuts on the cam (19); the pin spring (15) is fitted on the pin (16); two ends of the pin spring (15) abut on the lock cover (13) and the cam (19), respectively; the lock body PCB (110) is mounted in the inner cavity of the rotating compartment (12); the lock body PCB (110) is electrically connected to the motor (18) and the lock contacts (113).The automatically resettable passive latch lock according to claim 1, further comprising a steel ball (112) and a ground conductor (114); wherein the steel ball (112) is movably provided in the inner cavity of the turning tray (12), and the steel ball (112) is disposed on a side wall of the keyhole of the turning tray (12); the ground conductor (114) is mounted in the inner cavity of the turning tray (12), and the ground conductor (114) is in contact with the reset presser (17).The automatically resettable passive latch lock of claim 1, wherein the cam (19) is comprised of a cam body (191), a camshaft block (192), a cam limiting block (193), a cam sloped surface (194), a cylindrical cam surface (195), and has a cam arc groove (196); the cam limiting block (193) extends outward from an outer end of the cam body (191); the cam arc groove (196) is formed on an outer wall of the cam body (191); the camshaft block (192) extends outward from a side wall of the cam body (191); the cam sloped surface (194) is formed on an inner end of the cam body (191); the cylindrical cam surface (195) protrudes inward from the cam sloped surface (194).The automatically resettable passive swing latch lock according to claim 3, wherein the reset pusher (17) is formed in an L-shape; the L-shaped member has a vertical portion (171); an inner side wall of the vertical portion (171) has an arc-shaped sleeve (172); the arc-shaped sleeve (172) has an inclined face (173) that matches the cylindrical cam surface (195) of the cam (19).The automatically resettable passive latch lock of claim 1, further comprising a mounting plate (111), a tongue (115), and a nut (116); wherein the mounting plate (111) is provided in the interior cavity of the rotating compartment (12); the mounting plate (111) is movably mounted to an outer end of the pin (16); the tongue (115) is fixedly secured to an inner end of the rotating compartment (12) with the nut (116).The automatically resettable passive swing latch lock according to claim 2, wherein the key (2) is composed of a key housing (21), a key head (22), a guide plate (23), two return pins (24), a ground spring (25), a battery (26), an elastic ground plate (27), an elastic electrode plate (28), and a key PCB (29); the key head (22) is fixed to a front end of the key housing (21); a front end of the key head (22) has a steel ball groove (221) to receive the steel ball (112) in the lock body (1) therein; the guide plate (23) is movably provided in the key head (22); the return pins (24) are movably inserted into guide holes of the key head (22); the ground spring (25) is fitted on the respective return pin (24); two ends of the ground spring (25) press each against a flange (241) of the respective return pin (24) and the key housing (21) to generate a spring force with which the respective return pin (24) is pushed out; the battery (26) is mounted in the key housing (21); the ground elastic plate (27) and the electrode elastic plate (28) are provided on an inner wall of the key housing (21); the ground elastic plate (27) and the electrode elastic plate (28) are each in contact with one of the two electrodes of the battery (26) and electrically connected to the key PCB (29) and the two return pins (24) via cables.

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