CN111593952A - Safety tongue structure and intelligent lock - Google Patents
Safety tongue structure and intelligent lock Download PDFInfo
- Publication number
- CN111593952A CN111593952A CN202010390348.1A CN202010390348A CN111593952A CN 111593952 A CN111593952 A CN 111593952A CN 202010390348 A CN202010390348 A CN 202010390348A CN 111593952 A CN111593952 A CN 111593952A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- safety tongue
- rack
- gear
- push plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/10—Bolts of locks or night latches
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B3/00—Fastening knobs or handles to lock or latch parts
Abstract
The invention provides a safety tongue structure and an intelligent lock, which comprise a bottom shell, wherein the bottom shell is provided with: the mounting seat is provided with a handle mounting hole and is rotatably arranged on the bottom shell; the side wall of the mounting seat is provided with a poking piece for poking the rack to translate, and one end of the rack is positioned in the poking range of the poking piece; the gear is rotatably arranged and meshed with the other end of the rack; the connecting rod component is fixedly connected with the gear; the rotary arm is rotatably arranged and connected with the connecting rod assembly, and the connecting rod assembly is used for driving the rotary arm to rotate; the bottom shell is also provided with a lock hole for the safety tongue to pass through, and the rotary arm rotates back and forth to drive the safety tongue to extend into or retract along the lock hole. By adopting the technical scheme, the control of the safety tongue can be realized by pressing the door handle through the safety tongue structure, the operation is convenient and fast, the structure is simple and compact, the disassembly and the assembly are convenient, and the cost of the intelligent lock is reduced.
Description
Technical Field
The invention relates to the technical field of intelligent locks, in particular to a safety tongue structure and an intelligent lock.
Background
The existing intelligent lock is generally provided with three lock tongues, namely a main lock tongue, an auxiliary lock tongue and a safety lock tongue, wherein the safety lock tongue is opened and closed indoors, the intelligent lock has certain anti-theft capacity, is convenient to use, can be locked indoors without a key, and can not be opened to enter indoors even if a key is arranged outdoors after being locked, so that the intelligent lock is very convenient.
At present, a part of a lock body at the front part of a safety tongue structure is provided with a safety tongue, a person rotates a safety tongue knob on a lock panel in a door by hand to stretch the safety tongue into a lock hole (locking) and return the safety tongue to the lock hole (unlocking), a door lock handle is pressed to not return the safety tongue, the door is opened slowly when an emergency (such as a fire disaster) occurs, the safety tongue knob is rotated to open the safety tongue, then the handle is pressed downwards to open a main lock tongue and an oblique tongue, namely, all the lock tongues can be opened only by two actions, and people cannot rapidly escape from dangerous places; furthermore, the linkage structure of the safety tongue in the prior art is arranged on the rear panel, occupies the space of the rear panel, and is poor in safety performance, and in addition, the existing safety tongue structure adopts a plurality of gear parts to realize transmission, so that the transmission structure is complex, is not convenient to disassemble, assemble and maintain, and meanwhile, the cost of the intelligent lock is also improved.
Disclosure of Invention
The invention aims to provide a safety tongue structure, which can realize the control of a safety tongue by pressing a door handle, is convenient and fast to operate and unlock, is simple and compact in structure, is convenient to disassemble and assemble, and reduces the cost of an intelligent lock.
Based on this, the invention provides a safety tongue structure, which comprises a bottom shell, wherein the bottom shell is provided with:
the mounting seat is provided with a handle mounting hole and is rotatably arranged on the bottom shell;
the side wall of the mounting seat is provided with a shifting piece for shifting the rack to translate, and one end of the rack is positioned in the shifting range of the shifting piece;
the gear is rotatably arranged and is meshed with the other end of the rack;
the connecting rod assembly is fixedly connected with the gear;
the rotary arm is rotatably arranged and connected with the connecting rod assembly, and the connecting rod assembly is used for driving the rotary arm to rotate;
the safety tongue is linked with the rotary arm, a lock hole for the safety tongue to pass through is further formed in the bottom shell, and the rotary arm rotates in a reciprocating mode to drive the safety tongue to stretch into or retract along the lock hole.
Preferably, the translation direction of the rack and the movement direction of the safety tongue are perpendicular to each other.
Preferably, the rack is provided with at least two first waist-shaped holes arranged in parallel, the bottom shell is provided with a first rivet corresponding to the first waist-shaped holes in a penetrating manner, and the first rivet and the first waist-shaped holes are arranged in a sliding manner.
As preferred scheme, the rack is the broken line form, the quantity in first waist shape hole is two, two the axis in first waist shape hole is located the different straight line, the tip of rack forms the groove of dodging that holds the gear, the gear is located dodge the inslot and with the rack meshes mutually.
Preferably, the connecting rod assembly comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is fixedly connected with the gear, the second end of the first connecting rod is hinged to the first end of the second connecting rod through a first pin, a connecting rod is arranged on the side of the swing arm, and the second end of the second connecting rod is hinged to the connecting rod through a second pin.
Preferably, the bottom shell is connected with a second rivet in a penetrating mode, and the reset torsion spring is clamped between the second rivet and the second pin shaft.
Preferably, the safety device further comprises a push plate slidably arranged on the bottom plate, a first end of the push plate is abutted to the connecting rod, and a second end of the push plate is fixedly connected with the safety tongue.
Preferably, a sliding pin shaft is fixedly arranged on the bottom plate, the push plate is provided with a second waist-shaped hole corresponding to the sliding pin shaft, and the push plate is slidably arranged on the sliding pin shaft in a penetrating manner through the second waist-shaped hole.
As a preferable scheme, an open slot is formed in the side part of the push plate, the connecting rod is positioned in the open slot, two bayonets corresponding to the connecting rod are oppositely arranged in the open slot of the push plate, and the connecting rod is abutted to the push plate through the bayonets;
the bottom surface of push pedal is for leveling the face, just the bottom surface of push pedal with the upper surface of second connecting rod contacts.
In order to achieve the same purpose, the invention also provides an intelligent lock which comprises the safety tongue structure.
The embodiment of the invention has the following beneficial effects:
the handle arranged on the mounting seat is rotated, so that the poking piece on the mounting seat drives the rack to move in a translation manner, the rack drives the gear to rotate, the gear is fixedly connected with the connecting rod assembly, the connecting rod assembly moves to enable the rotary arm to rotate forwards and backwards, and the rotation of the rotary arm enables the safety tongue to extend into the lock hole or return, so that the locking or unlocking operation is completed, the switching operation of the safety tongue can be realized by pressing the handle, the intelligent lock can be unlocked quickly, and the use requirements of users under specific conditions are met; the safety tongue structure uses the gear matched with the rack, so that the transmission structure is simplified, the structure is more convenient to disassemble, assemble and maintain, the cost of the intelligent lock is reduced, in addition, the linkage structure of the safety tongue and other parts are compactly arranged in the bottom shell, the safety is improved, the space of the rear panel cannot be occupied, and the structure of the whole device is more compact.
Drawings
Fig. 1 is an exploded view of a safety tongue structure in an embodiment of the invention.
Fig. 2 is a schematic structural diagram of the assembled safety tongue structure in the embodiment of the invention.
Fig. 3 is a schematic structural view illustrating the safety tongue extending into the lock hole according to the embodiment of the present invention.
Fig. 4 is a schematic structural view illustrating the safety tongue separated from the lock hole according to the embodiment of the present invention.
In the figure: 1. a bottom case; 1a, a lock hole; 2. a mounting seat; 2a, a toggle piece; 3. a rack; 3a, a first waist-shaped hole; 3b, avoiding the groove; 4. a gear; 5. a connecting rod assembly; 5a, a first connecting rod; 5b, a second connecting rod; 6. a swing arm; 6a, a connecting rod; 7. a safety tongue; 8. a first rivet; 9. a first pin shaft; 10. a second pin shaft; 11. a return torsion spring; 12. a second rivet; 13. pushing the plate; 13a, an open slot; 13b, a bayonet; 13c, a second waist-shaped hole; 14. and the pin shaft is in sliding connection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1 to 4, the present embodiment provides a structure of a safety tongue 7, including a bottom case 1, where the bottom case 1 is provided with:
the intelligent lock comprises a mounting base 2 provided with a handle mounting hole, wherein the mounting base 2 is rotatably arranged on a bottom shell 1, and the bottom shell 1 is used as an accommodating space of a lock body, so that all parts of the intelligent lock are reasonably arranged, the mounting base 2 plays a role in mounting a handle on one hand, and is additionally provided with other parts such as a clutch and the like;
the rack 3 can be arranged in a translation mode, a stirring piece 2a used for stirring the rack 3 to translate is arranged on the side wall of the installation base 2, the stirring piece 2a is a protrusion arranged on the side portion of the installation base 2 in the embodiment, one end of the rack 3 is located in a stirring range of the stirring piece 2a, therefore, when the installation base 2 rotates along with the handle, the stirring piece 2a of the installation base 2 can stir the rack 3 to move in a translation mode, the handle structure is conventionally provided with a reset spring and the like, the reset spring and the like is used for resetting after the rotating handle is pressed and loosened, and the whole device is enabled to operate stably;
the gear 4 is rotatably arranged, the gear 4 is meshed with the other end of the rack 3, the gear 4 is arranged in the bottom shell 1, the rack 3 is translated to drive the gear 4 to rotate, and the rack 3 is translated to and fro to enable the gear 4 to rotate clockwise or anticlockwise;
the connecting rod assembly 5 is fixedly connected with the gear 4, and the gear 4 drives the connecting rod assembly 5 to move when rotating;
the swing arm 6 is rotatably arranged, the swing arm 6 is connected with the connecting rod assembly 5, the connecting rod assembly 5 is used for driving the swing arm 6 to rotate, and it is noted that the rack 3 is translated back and forth along the bottom shell 1, the gear 4 correspondingly rotates to drive the connecting rod assembly 5 to move, and the connecting rod assembly 5 enables the swing arm 6 to rotate forward and backward;
the safety bolt 7 is linked with the rotary arm 6, a lock hole 1a for the safety bolt 7 to pass through is further formed in the bottom shell 1, the rotary arm 6 rotates in a reciprocating mode to drive the safety bolt 7 to stretch into or retract along the lock hole 1a, and the rotary arm 6 rotates to enable the safety bolt 7 to stretch into or retract into the lock hole 1a, so that locking or unlocking operation is completed.
Based on the technical scheme, the handle arranged on the mounting seat 2 is rotated, so that the stirring piece 2a on the mounting seat 2 drives the rack 3 to move in a translation mode, the rack 3 drives the gear 4 to rotate, the gear 4 is fixedly connected with the connecting rod assembly 5, the connecting rod assembly 5 moves to enable the rotary arm 6 to rotate forwards and backwards, the rotary arm 6 rotates to enable the safety tongue 7 to extend into the lock hole 1a or return, and therefore locking or unlocking operation is completed, the switching operation of the safety tongue 7 can be achieved through pressing of the handle, the intelligent lock can be unlocked quickly, and the using requirements of users under specific conditions are met; above-mentioned insurance tongue 7 structure has used a gear 4 cooperation rack 3 to simplified transmission structure, made this structure dismouting maintain more convenient, and reduced the cost of intelligent lock, in addition, the linkage structure of insurance tongue 7 and other spare part compactness set up in drain pan 1, have improved the security, can not occupy the space of rear panel, and make the structure of whole device compacter.
In this embodiment, the translation direction of the rack 3 and the movement direction of the safety tongue 7 are perpendicular to each other, the movement direction of the rack 3 is set along the length direction of the bottom case 1, and the movement direction of the safety tongue 7 is set along the width direction of the bottom case 1, so that the arrangement structure of each component is more reasonable.
Preferably, be provided with two at least parallel arrangement's first waist shape hole 3a on the rack 3, it has connect to wear to set up on the drain pan 1 with the first rivet 8 that first waist shape hole 3a corresponds, first rivet 8 with relative sliding sets up between first waist shape hole 3a, and the central axis in first waist shape hole 3a is the same with rack 3's direction of motion, and first rivet 8 is fixed on drain pan 1, and rack 3 is along with slidable sets up between first waist shape hole 3a and the first rivet 8 to make rack 3 slidable set up on drain pan 1, be provided with two first waist shape holes 3a and can make rack 3's slip more stable. Further, rack 3 is the broken line form, the quantity in first waist shape hole 3a is two, two the axis in first waist shape hole 3a is located the different straight line to make setting up of rack 3 more stable, the tip formation of rack 3 holds dodging groove 3b of gear 4, gear 4 is located dodge in the groove 3b and with rack 3 meshes mutually, and the space in drain pan 1 can make full use of on the one hand of the rack 3 of broken line form also makes overall structure set up compactlyer simultaneously, dodges groove 3b and also makes gear 4 rotate in appointed region, avoids taking place the interference between a plurality of parts.
Specifically, the connecting rod assembly 5 includes a first connecting rod 5a and a second connecting rod 5b, a first end of the first connecting rod 5a is fixedly connected with the gear 4, the gear 4 is connected with the first connecting rod 5a through a bolt, a second end of the first connecting rod 5a is hinged to a first end of the second connecting rod 5b through a first pin 9, a connecting rod 6a is arranged on a side of the swing arm 6, a second end of the second connecting rod 5b is hinged to the connecting rod 6a through a second pin 10, the connecting rod structure enables the first connecting rod 5a to drive the second connecting rod 5b to be linked when the gear 4 rotates, and the connecting rod 6a on the swing arm 6 swings back and forth relative to the swing arm 6, so that the safety tongue 7 extends into and retracts. Preferably, still include reset torsion spring 11, the cross-under has second rivet 12 on the drain pan 1, reset torsion spring 11 card is established second rivet 12 with between the second round pin axle 10, reset torsion spring 11 makes the spiral arm 6 make reset torsion spring 11 take place the deformation after carrying out the rotation, after loosening the handle afterwards, reset torsion spring 11 makes spiral arm 6 rotate and reset to the home position to make the device stable use.
In order to make the movement structure of the safety tongue 7 more stable, the structure further comprises a push plate 13 slidably arranged on the bottom plate, a first end of the push plate 13 is abutted to the connecting rod 6a, a second end of the push plate 13 is fixedly connected with the safety tongue 7, and the connecting rod 6a is abutted to the push plate 13 to perform reciprocating translation through reciprocating rotation of the swing arm 6, so that unlocking and locking operations are completed. In addition, a sliding pin shaft 14 is fixedly arranged on the bottom plate, the push plate 13 is provided with a second slotted hole 13c corresponding to the sliding pin shaft 14, the push plate 13 slidably penetrates through the second slotted hole 13c on the sliding pin shaft 14, and the push plate 13 slides on the sliding pin shaft 14 along the second slotted hole 13c, so that the running motion of the safety tongue 7 is ensured, and it should be noted that the central axis of the first slotted hole 3a is perpendicular to the central axis of the second slotted hole 13 c.
Specifically, an open groove 13a is formed in a side portion of the push plate 13, the connecting rod 6a is located in the open groove 13a, two bayonets 13b corresponding to the connecting rod 6a are oppositely arranged in the open groove 13a of the push plate 13, the connecting rod 6a is abutted to the push plate 13 through the bayonets 13b, in this embodiment, the two bayonets 13b are oppositely arranged, the connecting rod 6a abuts against one of the bayonets 13b to enable the push plate 13 to drive the safety tongue 7 to extend into the lock hole 1a, the connecting rod 6a abuts against the other bayonet 13b to enable the push plate 13 to drive the safety tongue 7 to return, the abutting action of the connecting rod 6a is determined by the rotation direction of the rotating arm 6, and when the rotating arm 6 rotates in different directions, the connecting rod 6a abuts against different bayonets 13;
the bottom surface of push pedal 13 is for leveling the face, just the bottom surface of push pedal 13 with the upper surface of second connecting rod 5b contacts, and push pedal 13 is through the upper surface contact with second connecting rod 5b for push pedal 13 can obtain the stable stay, thereby has improved the motion stationarity of push pedal 13.
In order to achieve the same purpose, the embodiment also provides an intelligent lock, which comprises the structure of the safety tongue 7.
By adopting the safety tongue 7 structure and the intelligent lock provided by the embodiment of the invention, the poking piece 2a on the mounting seat 2 drives the rack 3 to move in a translation manner by rotating the handle arranged on the mounting seat 2, the rack 3 drives the gear 4 to rotate, the gear 4 is fixedly connected with the connecting rod assembly 5, the rotating arm 6 rotates forwards and backwards by the movement of the connecting rod assembly 5, the safety tongue 7 extends into the lock hole 1a or retracts by the rotation of the rotating arm 6, so that the locking or unlocking operation is completed, the switching operation of the safety tongue 7 can be realized by pressing the handle, the intelligent lock can be unlocked quickly, and the use requirements of users under specific conditions are met; above-mentioned insurance tongue 7 structure has used a gear 4 cooperation rack 3 to simplified transmission structure, made this structure dismouting maintain more convenient, and reduced the cost of intelligent lock, in addition, the linkage structure of insurance tongue 7 and other spare part compactness set up in drain pan 1, have improved the security, can not occupy the space of rear panel, and make the structure of whole device compacter.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a safety tongue structure which characterized in that, includes the drain pan, be provided with on the drain pan:
the mounting seat is provided with a handle mounting hole and is rotatably arranged on the bottom shell;
the side wall of the mounting seat is provided with a shifting piece for shifting the rack to translate, and one end of the rack is positioned in the shifting range of the shifting piece;
the gear is rotatably arranged and is meshed with the other end of the rack;
the connecting rod assembly is fixedly connected with the gear;
the rotary arm is rotatably arranged and connected with the connecting rod assembly, and the connecting rod assembly is used for driving the rotary arm to rotate;
the safety tongue is linked with the rotary arm, a lock hole for the safety tongue to pass through is further formed in the bottom shell, and the rotary arm rotates in a reciprocating mode to drive the safety tongue to stretch into or retract along the lock hole.
2. The safety tongue structure according to claim 1, wherein the direction of translation of the rack and the direction of movement of the safety tongue are perpendicular to each other.
3. The safety tongue structure as claimed in claim 2, wherein the rack is provided with at least two first kidney-shaped holes arranged in parallel, the bottom shell is provided with a first rivet corresponding to the first kidney-shaped holes, and the first rivet and the first kidney-shaped holes are arranged in a relative sliding manner.
4. The safety tongue structure according to claim 3, wherein the rack is in a zigzag shape, the number of the first waist-shaped holes is two, the central axes of the two first waist-shaped holes are located on different straight lines, an avoiding groove for accommodating a gear is formed at the end part of the rack, and the gear is located in the avoiding groove and meshed with the rack.
5. The safety tongue structure according to claim 2, wherein the connecting rod assembly comprises a first connecting rod and a second connecting rod, a first end of the first connecting rod is fixedly connected with the gear, a second end of the first connecting rod is hinged with a first end of the second connecting rod through a first pin, a connecting rod is arranged on the side of the swing arm, and a second end of the second connecting rod is hinged with the connecting rod through a second pin.
6. The safety tongue structure of claim 5, further comprising a return torsion spring, wherein a second rivet is connected to the bottom shell in a penetrating manner, and the return torsion spring is clamped between the second rivet and the second pin.
7. The safety tongue structure according to claim 6, further comprising a push plate slidably disposed on the bottom plate, wherein a first end of the push plate abuts against the connecting rod, and a second end of the push plate is fixedly connected to the safety tongue.
8. The safety tongue structure as claimed in claim 7, wherein a sliding pin is fixedly arranged on the bottom plate, the push plate is provided with a second waist-shaped hole corresponding to the sliding pin, and the push plate is slidably arranged on the sliding pin through the second waist-shaped hole.
9. The safety tongue structure as claimed in claim 7, wherein the side of the push plate is provided with an open slot, the connecting rod is located in the open slot, and the push plate is provided with two opposite bayonets corresponding to the connecting rod in the open slot, and the connecting rod abuts against the push plate through the bayonets;
the bottom surface of push pedal is for leveling the face, just the bottom surface of push pedal with the upper surface of second connecting rod contacts.
10. An intelligent lock, comprising a safety tongue arrangement as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010390348.1A CN111593952A (en) | 2020-05-09 | 2020-05-09 | Safety tongue structure and intelligent lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010390348.1A CN111593952A (en) | 2020-05-09 | 2020-05-09 | Safety tongue structure and intelligent lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111593952A true CN111593952A (en) | 2020-08-28 |
Family
ID=72187030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010390348.1A Pending CN111593952A (en) | 2020-05-09 | 2020-05-09 | Safety tongue structure and intelligent lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111593952A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRMU8403075U (en) * | 2004-12-15 | 2006-08-15 | Hailton Ferreira Carvalho | provision introduced for safes and the like |
| CN207620548U (en) * | 2017-12-04 | 2018-07-17 | 李泽权 | A kind of lock body |
| CN110359768A (en) * | 2019-01-25 | 2019-10-22 | 广东诺客韦尔科技有限公司 | A kind of lock body mechanism with fast-escape function |
| CN212897969U (en) * | 2020-05-09 | 2021-04-06 | 广东科徕尼智能科技有限公司 | Safety tongue structure and intelligent lock |
-
2020
- 2020-05-09 CN CN202010390348.1A patent/CN111593952A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRMU8403075U (en) * | 2004-12-15 | 2006-08-15 | Hailton Ferreira Carvalho | provision introduced for safes and the like |
| CN207620548U (en) * | 2017-12-04 | 2018-07-17 | 李泽权 | A kind of lock body |
| CN110359768A (en) * | 2019-01-25 | 2019-10-22 | 广东诺客韦尔科技有限公司 | A kind of lock body mechanism with fast-escape function |
| CN212897969U (en) * | 2020-05-09 | 2021-04-06 | 广东科徕尼智能科技有限公司 | Safety tongue structure and intelligent lock |
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