Safe and reliable automatic lock

Abstract

The safe and reliable automatic lock comprises a lock shell, a lock cover matched with the lock shell is arranged on the lock shell, a deadbolt is arranged on the lock cover and movably penetrates through the lock cover, a spring bolt hole and a detection bolt hole are formed in the side wall of one end of the lock shell, a spring bolt support and a detection bolt support are arranged in one end of the lock shell, and one end of the spring bolt support is rotationally connected with a spring bolt assembly. And the spring bolt assembly telescopically moves in a spring bolt hole of the lock shell. The anti-theft lock has a back locking function under the condition that a back locking structure is not needed, has the advantages of being simple in structure and low in production cost and use cost, greatly improves the safety and anti-theft performance of the lock, provides safety guarantee for smart home, and is suitable for popularization and application. The lock with the multi-bar cylindrical lock tongue effectively solves the problems that in the current market, a lock with the multi-bar cylindrical lock tongue is complex in structure, high in production cost and difficult to meet the requirements of middle and low-level consumers, and the lock with the multi-bar cylindrical lock tongue is designed for preventing a thief from shifting the lock tongue from the inside to the outside of a door by using a sheet-shaped flexible block to easily unlock and enter the door.

Description

Technical Field

[0001] The invention relates to the field of door locks, and in particular to a safe and reliable automatic lock. Background Art

[0002] With the development of smart homes, home security has become a key issue. Traditional anti-theft locks have great hidden dangers in security and security. Some thieves who break into houses can easily unlock the door by sliding the lock tongue from the inside to the outside of the door with a piece of flexible sheet. In order to solve this problem, some locks with multi-bar cylindrical lock tongues have appeared on the market. They have anti-locking functions, but because they are equipped with anti-locking structures, they have the disadvantages of complex structures and high production costs. They are difficult to meet the needs of middle and low-end consumers for cost-effective, safe and reliable locks. Therefore, they are not conducive to promotion in the middle and low-end markets. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a safe and reliable automatic lock.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: the safe and reliable automatic lock comprises a lock shell, a lock cover matching the lock shell is provided on the lock shell, a lock twist is provided on the lock cover, the lock twist movably penetrates the lock cover, a lock tongue hole and a detection tongue hole are respectively provided on the side walls of one end of the lock shell, a lock tongue bracket and a detection tongue bracket are provided in one end of the lock shell, the lock tongue bracket and the detection tongue bracket are arranged in parallel, one end of the lock tongue bracket is rotatably connected with a lock tongue assembly, the lock tongue assembly is telescopically movable in the lock tongue hole of the lock shell, the other end of the lock tongue bracket is integrally formed with a lock tongue guide rod, a first reset plate is provided in the lock shell, the first reset plate is opposite to the lock tongue bracket, the lock tongue guide rod movably penetrates the first reset plate, and a first spring driving the lock tongue assembly to extend out of the lock shell and reset is sleeved on the lock tongue guide rod; One end of the detection tongue bracket is rotatably connected with the detection tongue, and the detection tongue is telescopically movable in the detection tongue hole of the lock housing. The other end of the detection tongue bracket is integrally formed with a detection tongue guide rod. A second reset plate is also provided in the lock housing. The second reset plate is opposite to the detection tongue bracket. The detection tongue guide rod movably penetrates the second reset plate. A second spring that drives the detection tongue to extend out of the lock housing and resets is sleeved on the detection tongue guide rod; A first rotating transmission member, a second rotating transmission member and a knob are also provided in the lock housing. The first rotating transmission member, the second rotating transmission member and the knob are respectively connected to the lock housing for rotation. The first rotating transmission member transmits the second rotating transmission member. The knob is provided at the center of the lock housing. The lock knob is connected and installed with the knob. When the knob is rotated, the knob pushes one end of the first rotating transmission member. The first rotating transmission member rotates. The other end of the first rotating transmission member is released to resist the bolt bracket. The bolt assembly retracts into the lock housing for unlocking. A stepper motor is also provided in the lock housing, and the stepper motor drives the same end of the first rotating transmission member, the first rotating transmission member rotates, the other end of the first rotating transmission member is released to resist the bolt bracket, and the bolt assembly retracts into the lock housing to unlock; A lock tongue housing is provided on the side of one end of the lock housing, and an upper lock hole for accommodating the lock tongue assembly is provided on the lock tongue housing; A power supply and a circuit board are also arranged in the lock shell. The power supply is electrically connected to the circuit board, and the circuit board is electrically connected to the stepping motor. The power supply is installed in the lock shell through a power supply bottom box.

[0005] By adopting the above technical solution, when the stepper motor starts to extend or the knob is rotated counterclockwise, the first rotating transmission member can be pushed to rotate clockwise, so that the end of the first rotating transmission member close to the bolt bracket rotates in the direction away from the bolt bracket to release the blocking of the bolt bracket from retracting into the lock shell, so that the bolt assembly can be freely retracted into the lock shell. When the first rotating transmission member rotates counterclockwise, the end of the first rotating transmission member close to the bolt bracket rotates in the direction of the bolt bracket, when the first rotating transmission member and the side of the bolt bracket provided with the bolt guide rod conflict, the bolt bracket is blocked, and at this time, the bolt assembly cannot be retracted into the lock shell, which realizes the anti-locking function without the need for an anti-locking structure, so that it has the advantages of simple structure, low production cost and low use cost, so as to solve the problem that the lock with a multi-bar cylindrical bolt designed on the market to prevent thieves from using a sheet-like flexible block to slide the bolt from the inside of the door to the outside of the door to easily unlock the door has a complex structure, high production cost and is difficult to meet the needs of middle and low-end consumers.

[0006] Preferably, a bottom plate is extended laterally from the bottom of the detection tongue bracket, a shift rod is provided perpendicular to the bottom plate, and the shift rod and the bottom plate are integrally formed.

[0007] Preferably, an unlocking portion is provided at one end of the first rotating transmission member, and the unlocking portion is L-shaped. A locking portion is provided at the other end of the first rotating transmission member, and a driving plate is provided on one side end of the locking portion. The driving plate and the locking portion are perpendicular to each other and are integrally formed. A positioning shaft is provided vertically through the middle of the first rotating transmission member. The first rotating transmission member is rotatably connected to the lock housing through the positioning shaft. A torsion spring is sleeved on the positioning shaft, one end of the torsion spring is in contact with the driving plate, and the other end of the torsion spring is in contact with the first reset plate. A first limiting ring is provided above the torsion spring, and the first limiting ring limits the torsion spring on the positioning shaft.

[0008] Specifically, the driving plate is pushed by the elastic force of the torsion spring so that the first rotating transmission member rotates accordingly and drives the locking part to rotate around the positioning axis in the direction of the bolt bracket, the locking part and the bolt bracket are in conflict with each other on the side where the bolt guide rod is provided, the bolt bracket is blocked, and the bolt assembly cannot be retracted into the lock shell, which realizes the anti-locking function without being equipped with an anti-locking structure, so as to solve the problem that the traditional lock can be easily unlocked by using a sheet-like flexible block to insert into the door through the door gap and then slide the bolt from the inside to the outside of the door. When the unlocking part is pushed by the knob or the stepping motor, the first rotating transmission member rotates around the positioning axis, the locking part is away from the bolt bracket, the side where the bolt guide rod is provided is not blocked by the locking part, and the bolt assembly can be freely retracted into the lock shell for unlocking.

[0009] Preferably, a first transmission part is provided at one end of the second rotating transmission member, and a second transmission part is provided at the other end of the second rotating transmission member. A positioning column is integrally formed in the lock housing, and the positioning column runs through the middle part of the second rotating transmission member. The second rotating transmission member is rotatably connected to the lock housing through the positioning column, and a second limiting ring is sleeved on the positioning column.

[0010] By adopting the above-mentioned technical scheme, when the driving plate is pushed by the elastic force of the torsion spring to make the first rotating transmission part rotate around the positioning axis, the driving plate conflicts with the second transmission part and pushes the second rotating transmission part to rotate around the positioning rod, so that the first transmission part conflicts with the shift rod; when the detection tongue bracket is subjected to the elastic force of the second spring, it can drive the detection tongue to extend out of the lock shell and reset, and at the same time, the detection tongue bracket drives the shift rod to approach the direction of the first transmission part and conflicts with it. Since the torque of the first transmission part pushed by the shift rod is greater than the torque of the second transmission part pushed by the driving plate, when the unlocking part is not pushed by the stepping motor or the knob, the locking part and the lock tongue bracket are in a separated state, and the lock tongue assembly can be freely retracted into the lock shell for unlocking.

[0011] Preferably, a tension spring hanging rod and an unlocking drive block are respectively provided on the circumference of the knob, a mounting column is provided in the lock housing, and a tension spring is provided between the tension spring hanging rod and the mounting column opposite thereto.

[0012] By adopting the above technical solution, the knob is rotated to drive the unlocking drive block to push the unlocking part to rotate and then the knob is released. The knob rotates in the opposite direction to reset with the tension spring hanging rod and under the action of the tension of the tension spring.

[0013] Specifically, a cover plate is provided in the lock shell, the first rotating transmission member is rotatably connected to the cover plate through a positioning shaft, the second rotating transmission member is rotatably connected to the cover plate through a positioning column, the knob is rotatably connected to the cover plate, a first lock tongue guide groove is provided on the lock shell, and a second lock tongue guide groove and a detection tongue guide groove are respectively provided on the cover plate.

[0014] Specifically, a first lock tongue guide block matching the first lock tongue guide groove is provided at the bottom of the lock tongue bracket, and a second lock tongue guide block matching the second lock tongue guide groove is provided at the top of the lock tongue bracket.

[0015] Specifically, a detection tongue guide block matching the detection tongue guide groove is provided on the top of the detection tongue bracket.

[0016] Preferably, the lock tongue assembly includes a first lock tongue and a second lock tongue, the first lock tongue and the second lock tongue are respectively rotatably connected to the lock tongue bracket, a lock tongue limiting portion is laterally extended at one end of the first lock tongue, the lock tongue limiting portion is rhombus-shaped, two inclined surfaces of the lock tongue limiting portion are respectively lock tongue guide surfaces, the lock tongue limiting portion faces the lock tongue bracket and two adjacent side surfaces are respectively lock tongue limiting surfaces, the two lock tongue limiting surfaces are obliquely butted, a lock tongue positioning portion is laterally extended at the other end of the first lock tongue, the lock tongue positioning portion is semicircular, the side surface of the lock tongue positioning portion opposite to the lock tongue hole is the lock tongue positioning surface, the lock tongue positioning surface is perpendicular to one of the lock tongue guide surfaces of the lock tongue limiting portion, and the lock tongue limiting portion and the lock tongue positioning portion are respectively arranged on two side surfaces of the first lock tongue.

[0017] Specifically, the structure of the second lock tongue is the same as that of the first lock tongue, and the second lock tongue is arranged opposite to the first lock tongue.

[0018] By adopting the above technical solution, the lock tongue positioning surfaces of the first lock tongue and the second lock tongue are in conflict with the side wall of the lock shell, the first lock tongue and the second lock tongue are staggered and separated, and the lock tongue bracket can push the first lock tongue and the second lock tongue to be pressed against the side wall of the lock shell under the elastic force of the first spring, and the first lock tongue and the second lock tongue are separated and positioned on the side wall of the lock shell. When closing the door, the first lock tongue is squeezed by the door frame and rotates toward the second lock tongue until the lock tongue limiting surface of the first lock tongue toward the second lock tongue and conflicts with the front end of the lock tongue bracket, at this time, the first lock tongue and the second lock tongue are close together, the first lock tongue and the second lock tongue are squeezed by the door frame respectively and retracted into the lock shell together, the first lock tongue and the second lock tongue jointly cross the door frame and enter the upper lock hole, because the first lock tongue and the second lock tongue will compress the first spring in the process of entering the upper lock hole, so that the first spring uses its own rebound force to push the lock tongue bracket and then drive the lock tongue assembly to extend out of the lock tongue hole of the lock shell and enter the upper lock hole of the lock tongue shell, and the lock tongue assembly is automatically locked. When the door is opened, the second lock tongue is squeezed by the tongue lock shell and rotates toward the first lock tongue until the second lock tongue faces the lock tongue limiting surface of the first lock tongue and collides with the front end of the lock tongue bracket. At this time, the first lock tongue and the second lock tongue are close to each other, and the first lock tongue and the second lock tongue are respectively squeezed by the lock tongue shell and retracted into the lock shell together, and the lock tongue assembly is unlocked. After the first lock tongue and the second lock tongue cross the door frame together, the first spring pushes the lock tongue bracket according to the aforementioned principle, and then drives the lock tongue assembly to extend out of the lock tongue hole of the lock shell to reset.

[0019] Preferably, a detection tongue limiting portion is provided on one end portion of the detection tongue extending laterally, the detection tongue limiting portion is arranged in a triangular shape, and the two inclined surfaces of the detection tongue limiting portion are respectively detection tongue guide surfaces, and a detection tongue positioning portion is provided on the other end portion of the detection tongue extending laterally, the detection tongue positioning portion is arranged in an arc shape, and the two side surfaces of the detection tongue positioning portion facing the detection tongue hole are detection tongue limiting surfaces, and the detection tongue positioning portion and the detection tongue limiting portion are respectively arranged on the two side surfaces of the detection tongue.

[0020] By adopting the above technical solution, when closing the door, the detection tongue is squeezed by the door frame and rotates in the direction away from the lock tongue housing until the detection tongue guide surface contacts the detection tongue hole. At this time, the detection tongue continues to be squeezed by the door frame and gradually retracts into the detection tongue hole of the lock housing. When closing the door and locking it, the detection tongue is pressed by the opposite surface of the lock tongue housing and retracts into the detection tongue hole of the lock housing. When opening the door, the detection tongue leaves the lock tongue housing, the second spring pushes the detection tongue bracket and then drives the detection tongue to extend out of the detection tongue hole of the lock housing, the detection tongue bracket drives the lever to move the first transmission part and then drives the second rotating transmission member to rotate around the positioning column, so that the second rotating part can push the driving plate to drive the first rotating transmission member to rotate around the positioning axis, and the locking part rotates in the direction away from the lock tongue bracket with the rotation of the first rotating transmission member to release the blocking of the lock tongue bracket from retracting into the lock hole of the lock housing, so that the lock tongue assembly can be freely retracted into the lock housing.

[0021] Compared with the prior art, the beneficial effects of the present invention are: 1. A first rotating transmission member, a second rotating transmission member and a knob are arranged in the lock housing, and the structures of the first rotating transmission member, the second rotating transmission member, the knob, the bolt assembly and the detection tongue are designed and used in coordination, so that when the door is closed and locked, the bolt assembly and the detection tongue are squeezed by the door frame and slowly retract into the lock housing, the lever yields to the first transmission member as the detection tongue bracket retracts into the lock housing, and at the same time, the second transmission member yields to the driving plate, the torsion spring pushes the driving plate and then drives the locking member to rotate around the positioning axis and the bolt bracket, and in the process of the bolt assembly retracting into the lock housing, the locking member first conflicts with the side of the bolt bracket without blocking the bolt bracket from retracting into the lock housing, thereby realizing unobstructed locking; when the door is completely closed, the bolt bracket is retracted under the elastic force of the first spring. The locking portion and the locking tongue bracket are misaligned, and the locking portion and the side of the locking tongue bracket provided with the locking tongue guide rod conflict with each other to limit the retraction of the locking tongue assembly into the lock shell. It realizes the automatic anti-locking function without being equipped with an anti-locking structure, has a high security and theft prevention index, provides security for smart homes, is conducive to promotion and use in the mid- and low-end markets, and has the advantages of simple structure, low production cost and low use cost. It effectively solves the problems of complicated structure, high production cost and difficulty in meeting the needs of mid- and low-end consumers in the current market for preventing thieves from using a piece of sheet-like flexible block to slide the lock tongue from the inside to the outside of the door to easily unlock the door and enter the door, which are designed with multi-bar cylindrical lock tongues.

[0022] 2. It adopts a stepping motor and a first rotating transmission member for use. When the output end of the stepping motor extends out to push the unlocking part to rotate clockwise, the locking part synchronously rotates around the positioning shaft clockwise and rotates in a direction away from the lock tongue bracket to release the locked state in which the lock tongue assembly is blocked from extending and retracting in the lock shell, so that the lock tongue assembly can be freely retracted into the lock shell for unlocking, which realizes intelligent unlocking; when the knob is twisted to drive the unlocking drive block to push the unlocking part to rotate clockwise, the first rotating transmission member rotates around the positioning shaft clockwise, and the locking part rotates in a direction away from the lock tongue bracket to release the locked state in which the lock tongue assembly is blocked from extending and retracting in the lock shell, and the lock tongue assembly can be freely retracted into the lock shell for unlocking, which not only realizes that the lock can be unlocked by twisting the knob with a key outside the door and the knob can be driven to unlock by manually twisting the lock knob inside the door, but also realizes intelligent unlocking by a stepping motor, so that it has a plurality of unlocking methods without the need to be equipped with an anti-locking structure, so as to facilitate the user's flexible use, which greatly improves the convenience of use to achieve the purpose of strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] For ease of explanation, the present invention is described in detail with reference to the following preferred embodiments and the accompanying drawings.

[0024] Figure 1 The present invention is a three-dimensional diagram of a safe and reliable automatic lock and a lock tongue housing.

[0025] Figure 2 The present invention is a three-dimensional diagram of a safe and reliable automatic lock with a lock cover and a lock twist removed.

[0026] Figure 3 The figure is a three-dimensional diagram of the internal structure of a safe and reliable automatic lock of the present invention.

[0027] Figure 4 This is a three-dimensional diagram of the internal structure of another side of a safe and reliable automatic lock of the present invention.

[0028] Figure 5 The present invention is a three-dimensional diagram of the internal structure of a safe and reliable automatic lock driving bolt assembly and a detection tongue switch lock.

[0029] Figure 6 The present invention is a three-dimensional diagram of the transmission structure of a safe and reliable automatic lock driving bolt assembly and a detection tongue switch lock.

[0030] Figure 7 The present invention is a three-dimensional diagram of a lock tongue housing of a safe and reliable automatic lock.

[0031] Figure 8 The present invention is a three-dimensional assembly diagram of a detection tongue and a detection tongue bracket of a safe and reliable automatic lock.

[0032] Fig. 9 A safe and reliable automatic lock of the present invention Figure 6 Stereoscopic diagram of the transmission structure in different directions.

[0033] Fig.10 The present invention is a front view of a bolt assembly of a safe and reliable automatic lock.

[0034] Fig.11 The present invention is a three-dimensional diagram of a bolt assembly of a safe and reliable automatic lock.

[0035] Fig.12 It is a three-dimensional diagram of a first locking tongue or a second locking tongue of a safe and reliable automatic lock of the present invention.

[0036] Fig.13 A safe and reliable automatic lock of the present invention Fig.12 Stereoscopic images from different perspectives.

[0037] Fig.14 The present invention is a three-dimensional diagram of a detection tongue of a safe and reliable automatic lock.

[0038] Fig.15 A safe and reliable automatic lock of the present invention Fig.14 Stereoscopic images from different perspectives. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] Reference Figures 1 to 6As shown, a safe and reliable automatic lock of the present invention comprises a lock shell 1, a lock cover 2, a lock twist 3, a lock tongue hole 4, a detection tongue hole 5, a lock tongue bracket 6, a detection tongue bracket 7, a lock tongue assembly 8, a lock tongue guide rod 9, a first reset plate 10 and a first spring 11, etc., wherein the lock cover 2 is arranged on the lock shell 1 and matches the lock shell 1, the lock twist 3 is arranged on the lock cover 2, the lock twist 3 movably passes through the lock cover 2, the lock tongue hole 4 and the detection tongue hole 5 are respectively arranged on the side wall of one end of the lock shell 1, the lock tongue bracket 6 and the detection tongue bracket 7 are respectively arranged on one end of the lock shell 1 The end portion, and the lock tongue bracket 6 and the detection tongue bracket 7 are arranged in parallel, one end of the lock tongue bracket 6 is rotatably connected to the lock tongue assembly 8, the lock tongue assembly 8 is telescopically movable in the lock tongue hole 4 of the lock shell 1, the lock tongue guide rod 9 and the other end of the lock tongue bracket 6 are integrally formed, the first reset plate 10 is arranged in the lock shell 1, the first reset plate 10 is opposite to the lock tongue bracket 6, the lock tongue guide rod 9 movably passes through the first reset plate 10, and the first spring 11 is sleeved on the lock tongue guide rod 9, which is used to drive the lock tongue assembly 8 to extend out of the lock shell 1 to reset.

[0042] One end of the detection tongue bracket 7 is rotatably connected to the detection tongue 12, and the detection tongue 12 is retractable and movable in the detection tongue hole 5 of the lock housing 1. The other end of the detection tongue bracket 7 is integrally formed with a detection tongue guide rod 13. A second reset plate 14 is provided in the lock housing 1, and the second reset plate 14 is opposite to the detection tongue bracket 7. The detection tongue guide rod 13 movably passes through the second reset plate 14. A second spring 15 is sleeved on the detection tongue guide rod 13 to drive the detection tongue 12 to extend out of the lock housing 1 and reset.

[0043] A first rotating transmission member 16, a second rotating transmission member 17 and a knob 18 are provided in the lock housing 1. The first rotating transmission member 16, the second rotating transmission member 17 and the knob 18 are respectively connected to the lock housing 1 for rotation. The first rotating transmission member 16 and the second rotating transmission member 17 transmit. The knob 18 is arranged at the center of the lock housing 1. One end of the knob 18 is connected and installed with the lock twist 3. The other end of the knob 18 is provided with a keyhole for inserting a key. When the knob 18 is rotated, the knob 18 pushes one end of the first rotating transmission member 16 to rotate clockwise. The clockwise rotation of the first rotating transmission member 16 drives the other end thereof to rotate and release the resistance to the lock tongue bracket 6. The lock tongue assembly 8 retracts into the lock housing 1 to unlock.

[0044] A stepper motor 19 is provided in the lock housing 1, and the stepper motor 19 is fixedly installed in the lock housing 1 through a motor fixing member 191. The stepper motor 19 pushes one end of the first rotating transmission member 16 to rotate clockwise, and the first rotating transmission member 16 rotates clockwise to drive the other end thereof to rotate and release the resistance to the lock tongue bracket 6, and the lock tongue assembly 8 retracts the lock housing 1 to unlock.

[0045] Reference Figure 7 As shown, a lock tongue housing 20 is provided on the side of one end of the lock housing 1 , and an upper lock hole 21 for accommodating the lock tongue assembly 8 is provided on the lock tongue housing 20 .

[0046] Reference Figures 3 to 5 As shown, a power supply 22 and a circuit board 23 are respectively provided in the lock housing 1, the power supply 22 is electrically connected to the circuit board 23, the circuit board 23 is electrically connected to the stepping motor 19, the power supply 22 is installed in the lock housing 1 through a power base box 24, and the power base box 24 is installed in the lock housing 1 through a base box positioning column 241. In this embodiment, two base box positioning columns 241 are provided, and in other embodiments, different numbers of the base box positioning columns 241 can be provided according to actual conditions, so it is not limited to this.

[0047] Reference Figure 8 As shown, a bottom plate 71 is extended laterally from the bottom of the detection tongue bracket 7 , and a lever 72 is provided perpendicular to the bottom plate 71 . The lever 72 and the bottom plate 71 are integrally formed.

[0048] Reference Fig. 9 As shown, an unlocking portion 161 is provided at one end of the first rotating transmission member 16, and the unlocking portion 161 is arranged in an L shape. A locking portion 162 is provided at the other end of the first rotating transmission member 16, and a driving plate 163 is provided on one side end of the locking portion 162. The driving plate 163 and the locking portion 162 are perpendicular to each other and are integrally formed. A positioning shaft 164 is vertically penetrated through the middle of the first rotating transmission member 16. The first rotating transmission member 16 can rotate around the positioning shaft 164. The first rotating transmission member 16 is rotatably connected to the lock housing 1 through the positioning shaft 164. A torsion spring 165 is sleeved on the positioning shaft 164. One end of the torsion spring 165 is in contact with the driving plate 163, and the other end of the torsion spring 165 is in contact with the first reset plate 10. A first limiting ring 166 is provided above the torsion spring 165. The first limiting ring 166 The spring 165 is limited on the positioning shaft 164. The above structural design enables the torsion spring 165 to push the driving plate 163 to drive the first rotating transmission member 16 to rotate and then drive the locking portion 162 to rotate around the positioning shaft 164 in the direction of the lock tongue bracket 6. When the locking portion 162 conflicts with the side of the lock tongue bracket 6 provided with the lock tongue guide rod 9, the lock tongue bracket 6 is resisted, and the lock tongue assembly 8 cannot be retracted into the lock shell 1, thereby realizing the function of automatic anti-locking, and it does not need to be equipped with an anti-locking structure; when the unlocking portion 161 is pushed by the knob 18 or the stepping motor 19, it can drive the first rotating transmission member 16 to rotate around the positioning shaft 164, so that the locking portion 162 rotates in the direction away from the lock tongue bracket 6, and the side of the lock tongue bracket 6 provided with the lock tongue guide rod 9 is not resisted by the locking portion 162, so that the lock tongue assembly 8 can be freely retracted into the lock shell 1 for unlocking.

[0049] Reference Fig. 9As shown, a first transmission part 171 is provided at one end of the second rotating transmission member 17, and a second transmission part 172 is provided at the other end of the second rotating transmission member 17. A positioning column 173 is integrally formed in the lock housing 1. The positioning column 173 runs through the middle part of the second rotating transmission member 17. The second rotating transmission member 17 is rotatably connected to the lock housing 1 through the positioning column 173, and a second limiting ring 174 is sleeved on the positioning column 173.

[0050] Reference Fig. 9 As shown, a tension spring hanging rod 181 and an unlocking drive block 182 are respectively provided on the circumference of the knob 18, a mounting column 180 is provided in the lock housing 1, and a tension spring 183 is provided between the tension spring hanging rod 181 and the mounting column 180 opposite thereto, and the tension spring 183 is used to pull the rotated knob 18 to rotate in the opposite direction to reset.

[0051] Reference Figure 2 , Figure 4 and Figure 6 As shown, a cover plate 25 is further provided in the lock housing 1, the first rotating transmission member 16 is rotatably connected to the cover plate 25 via a positioning shaft 164, the second rotating transmission member 17 is rotatably connected to the cover plate 25 via a positioning column 173, the knob 18 is rotatably connected to the cover plate 25, a first lock tongue guide groove 26 is provided on the lock housing 1, a second lock tongue guide groove 27 and a detection tongue guide groove 28 are respectively provided on the cover plate 25, and a circuit board 23 is arranged on the cover plate 25.

[0052] Reference Figure 2 and Figure 4 As shown, a first knob mounting hole 31 is opened in the center of the lock housing 1, and a second knob mounting hole 32 is opened on the cover plate 25. One end of the knob 18 is connected and installed with the lock housing 1 through the first knob mounting hole 31, and the other end of the knob 18 is connected and installed with the cover plate 25 through the second knob mounting hole 32.

[0053] Specifically, the cover plate 25 is installed in the lock housing 1 through one or more cover plate positioning columns 251. In this embodiment, four cover plate positioning columns 251 are provided. In other embodiments, different numbers of cover plate positioning columns 251 can be provided according to actual conditions, so it is not limited to this.

[0054] Reference Figure 8 As shown, a detection tongue guide block 70 matching the detection tongue guide groove 28 is provided on the top of the detection tongue bracket 7 .

[0055] Reference Fig.10 and Fig.11 As shown, a first lock tongue guide block 29 matching the first lock tongue guide groove 26 is provided at the bottom of the lock tongue bracket 6 , and a second lock tongue guide block 30 matching the second lock tongue guide groove 27 is provided at the top of the lock tongue bracket 6 .

[0056] Reference Figures 10 to 13 As shown, the lock tongue assembly 8 includes a first lock tongue 81 and a second lock tongue 82, the first lock tongue 81 and the second lock tongue 82 are respectively rotatably connected to the lock tongue bracket 6, one end of the first lock tongue 81 is laterally extended with a lock tongue limiting portion 83, the lock tongue limiting portion 83 is rhombus-shaped, and the two inclined surfaces of the lock tongue limiting portion 83 are respectively lock tongue guide surfaces 84, the lock tongue limiting portion 83 faces the lock tongue bracket 6 and the two adjacent side surfaces are respectively lock tongue limiting surfaces 85, the two lock tongue limiting surfaces 85 are obliquely butted, and the other end of the first lock tongue 81 is laterally extended with a lock tongue positioning portion 86 The lock tongue positioning portion 86 is arranged in a semicircular shape, and the side of the lock tongue positioning portion 86 opposite to the lock tongue hole 4 is a lock tongue positioning surface 87, and the lock tongue positioning surface 87 is perpendicular to one of the lock tongue guide surfaces 84 of the lock tongue limiting portion 83, and the lock tongue limiting portion 83 and the lock tongue positioning portion 86 are respectively arranged on two side surfaces of the first lock tongue 81; the structure of the second lock tongue 82 is the same as that of the first lock tongue 81, and the second lock tongue 82 is arranged opposite to the first lock tongue 81. The above structural design can make the first lock tongue 81 rotate to the direction of the second lock tongue 82 to the first lock tongue when the door is closed due to the compression of the door frame. The first lock tongue 81 is pressed toward the second lock tongue 82 by the lock tongue limiting surface 85 and the front end of the lock tongue bracket 6. At this time, the first lock tongue 81 and the second lock tongue 82 are close together, and the first lock tongue 81 and the second lock tongue 82 are respectively squeezed by the door frame and retracted into the lock shell 1 together. The first lock tongue 81 and the second lock tongue 82 cross the door frame together and enter the upper lock hole 21. The first spring 11 pushes the lock tongue bracket 6 and then drives the lock tongue assembly 8 to extend out of the lock tongue hole 4 of the lock shell 1 and enter the upper lock hole 21 of the lock tongue shell 20. When the door is opened, the second lock tongue 82 is squeezed toward the first lock tongue 81 by the lock tongue lock shell 1. The lock tongue limit surface 85 of the second lock tongue 82 facing the first lock tongue 81 is rotated in the direction until it contacts the front end of the lock tongue bracket 6. At this time, the first lock tongue 81 and the second lock tongue 82 are close together, and the first lock tongue 81 and the second lock tongue 82 are respectively squeezed by the lock tongue shell 20 and retracted into the lock shell 1 together. After the first lock tongue 81 and the second lock tongue 82 cross the door frame together, the first spring 11 pushes the lock tongue bracket 6 and then drives the lock tongue assembly 8 to extend out of the lock tongue hole 4 of the lock shell 1 to reset, which realizes the anti-locking function and allows the lock tongue assembly 8 to be freely retracted into the lock shell 1 for unlocking.

[0057] Reference Fig.14 and Fig.15 As shown, a detection tongue limiting portion 121 is laterally extended from one end of the detection tongue 12, and the detection tongue limiting portion 121 is arranged in a triangular shape. The two inclined surfaces of the detection tongue limiting portion 121 are respectively detection tongue guide surfaces 122. A detection tongue positioning portion 123 is laterally extended from the other end of the detection tongue 12, and the detection tongue positioning portion 123 is arranged in an arc shape. The two side surfaces of the detection tongue positioning portion 123 facing the detection tongue hole 5 are detection tongue limiting surfaces 124. The detection tongue positioning portion 123 and the detection tongue limiting portion 121 are respectively arranged on the two side surfaces of the detection tongue 12.

[0058] Reference Figures 1 to 15 As shown, the working process of the safe and reliable automatic lock is as follows: when the door needs to be closed and locked, the bolt assembly 8 and the detection tongue 12 are squeezed by the door frame and slowly retracted into the lock shell 1 respectively, and the lever 72 retreats to the first transmission part 171 as the detection tongue bracket 7 retracts into the lock shell 1, and at the same time, the second transmission part 172 retreats to the driving plate 163, so that the torsion spring 165 pushes the driving plate 163 and then drives the locking part 162 to rotate around the positioning shaft 164 toward the direction of the bolt bracket 6. In the process of the bolt assembly 8 retracting into the lock shell 1, the locking part 162 first conflicts with the side of the bolt bracket 6 without blocking the bolt bracket 6 from retracting into the lock shell 1; when the door is completely closed, the detection tongue 12 is pressed by the opposite surface of the bolt shell 20, and the detection tongue 12 will not extend out of the lock shell 1 to reset, and the lever 72 will not push the first transmission part 171. The second transmission part 172 will not press the driving plate 163, and the driving plate 163 on the locking part 162 is pushed by the elastic force of the torsion spring 165, so that the locking part 162 continues to keep pressing against the side of the lock tongue bracket 6; when the door is completely closed, the lock tongue bracket 6 drives the lock tongue assembly 8 to extend out of the lock shell 1 and reset under the elastic force of the first spring 11. At this time, the locking part 162 and the lock tongue bracket 6 are misaligned, and the locking part 162 and the side of the lock tongue bracket 6 provided with the lock tongue guide rod 9 are in conflict to limit the retraction of the lock tongue assembly 8 into the lock shell 1, which realizes the locking of the lock tongue assembly 8 and has the function of automatic anti-locking to prevent thieves from using a piece of sheet-like flexible block to slide the lock tongue from the inside of the door to the outside of the door to easily unlock the door, which provides a safer protection for smart homes and a higher anti-theft safety index.

[0059] When the bolt assembly 8 needs to be unlocked, there are three unlocking methods, the first is to drive the knob 18 to rotate by twisting the lock knob 3 inside the door, the second is to drive the knob 18 to rotate by inserting the key into the keyhole outside the door, and the third is to unlock the bolt assembly 8 by the stepping motor 19. When the user rotates the knob 18 in the first and second methods, the rotating knob 18 pushes the unlocking part 161 to rotate clockwise through the unlocking drive block 182, so that the first rotating transmission member 16 rotates around the positioning shaft 164, and the locking part 162 rotates in a direction away from the bolt bracket 6 to release the interference with the side of the bolt bracket 6 provided with the bolt guide rod 9. At this time, the bolt assembly 8 can be freely retracted into the lock housing 1 for unlocking, so that the locking state of the bolt assembly 8 can be released by twisting the knob 18. When the knob 18 is released or stops turning, the tension spring 183 pulls the tension spring hanging rod 181 and then drives the knob 18 to rotate and reset to release the pressure of the unlocking drive block 182 on the unlocking portion 161. The driving plate 163 pushes the locking portion 162 to rotate around the positioning shaft 164 under the elastic force of the torsion spring 165, so that the driving plate 163 resumes the contact with the second transmission portion 172, and the first rotating transmission member 16 restores the initial unlocking state of the lock tongue assembly 8.

[0060] When the stepper motor 19 is used to release the locking state of the bolt assembly 8, the stepper motor 19 is started, and the output end of the stepper motor 19 extends to push the unlocking part 161 to rotate clockwise, so that the locking part 162 rotates around the positioning shaft 164 and moves away from the bolt bracket 6. At this time, the bolt assembly 8 can be freely retracted into the lock shell 1 for unlocking. When the output end of the stepper motor 19 is retracted, the push on the unlocking part 161 will be released, and the torsion spring 165 uses its elastic force to push the drive plate 163 to drive the locking part 162 and the drive plate 163 to rotate around the positioning shaft 164 toward the direction of the bolt bracket 6, so that the drive plate 163 resumes the conflict with the second transmission part 172, and the first rotating transmission member 16 restores the initial unlocking state of the bolt assembly 8, which realizes the intelligent unlocking by the stepper motor 19.

[0061] The overall structure uses the first rotating transmission member 16, the second rotating transmission member 17 and the knob 18 in conjunction with the bolt assembly 8 and the detection tongue 12, so that when the door is locked, unobstructed locking is achieved, and when the door is completely closed, the locking portion 162 and the side of the bolt bracket 6 provided with the bolt guide rod 9 are in conflict with each other to limit the retraction of the bolt assembly 8 into the lock housing 1, so that it can achieve the reverse locking function without the need for a reverse locking structure, and has a variety of unlocking methods to meet the unlocking requirements of users, which simplifies the structure of the lock with reverse locking function currently on the market and reduces the current The production cost of locks with anti-locking function on the market not only has the advantages of simple structure, low production cost and low use cost, but also greatly improves the security and anti-theft performance of the locks, and provides a safer protection for smart homes, so as to meet the needs of middle and low-level consumers for locks with high cost performance, safety and reliability. It effectively solves the problem that locks with multi-bar cylindrical lock tongues currently on the market are designed to prevent thieves from easily unlocking the door by sliding the lock tongue from the inside to the outside of the door with a piece of sheet-like flexible block, which have complex structure, high production cost and are difficult to meet the needs of middle and low-level consumers.

[0062] The above embodiment is only an example of the present invention and is not intended to limit the implementation and scope of rights of the present invention. Any technical solution that is identical or equivalent to the content described in the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A safe and reliable automatic lock, comprising a lock shell, a lock cover matching the lock shell, a lock twist on the lock cover, the lock twist movably passes through the lock cover, a lock tongue hole and a detection tongue hole are respectively provided on the side wall of one end of the lock shell, characterized in that: A lock tongue bracket and a detection tongue bracket are arranged in one end of the lock shell, and the lock tongue bracket and the detection tongue bracket are arranged in parallel. A lock tongue assembly is rotatably connected to one end of the lock tongue bracket, and the lock tongue assembly is telescopically movable in the lock tongue hole of the lock shell. A lock tongue guide rod is integrally formed at the other end of the lock tongue bracket, and a first reset plate is arranged in the lock shell, and the first reset plate is opposite to the lock tongue bracket. The lock tongue guide rod movably passes through the first reset plate, and a first spring driving the lock tongue assembly to extend out of the lock shell and reset is sleeved on the lock tongue guide rod; One end of the detection tongue bracket is rotatably connected with the detection tongue, and the detection tongue is telescopically movable in the detection tongue hole of the lock housing. The other end of the detection tongue bracket is integrally formed with a detection tongue guide rod, and a second reset plate is arranged in the lock housing, the second reset plate is opposite to the detection tongue bracket, and the detection tongue guide rod movably passes through the second reset plate, and a second spring driving the detection tongue to extend out of the lock housing and reset is sleeved on the detection tongue guide rod; A first rotating transmission member, a second rotating transmission member and a knob are arranged in the lock housing, the first rotating transmission member, the second rotating transmission member and the knob are respectively connected to the lock housing for rotation, the first rotating transmission member and the second rotating transmission member are transmitted, the knob is arranged at the center of the lock housing, the lock knob is connected and installed with the knob, the knob is rotated, the knob pushes one end of the first rotating transmission member, the first rotating transmission member rotates, the other end of the first rotating transmission member is released to resist the lock tongue bracket, and the lock tongue assembly is retracted into the lock housing for unlocking; A stepper motor is arranged in the lock housing, and the stepper motor pushes the same end of the first rotating transmission member, the first rotating transmission member rotates, the other end of the first rotating transmission member is released to resist the lock tongue bracket, and the lock tongue assembly retracts into the lock housing to unlock; A lock tongue housing is provided on the side of one end of the lock housing, and an upper lock hole for accommodating the lock tongue assembly is provided on the lock tongue housing; A power supply and a circuit board are arranged in the lock shell. The power supply is electrically connected to the circuit board, the circuit board is electrically connected to the stepping motor, and the power supply is installed in the lock shell through a power supply bottom box.

2. A safe and reliable automatic lock according to claim 1, characterized in that: A bottom plate is extended laterally from the bottom of the detection tongue bracket, and a shift rod is provided perpendicular to the bottom plate. The shift rod and the bottom plate are integrally formed.

3. A safe and reliable automatic lock according to claim 1, characterized in that: One end of the first rotating transmission member is provided with an unlocking portion, and the unlocking portion is L-shaped. The other end of the first rotating transmission member is provided with a locking portion. A driving plate is provided on one side end of the locking portion. The driving plate and the locking portion are perpendicular to each other and are integrally formed. A positioning shaft is provided vertically through the middle of the first rotating transmission member. The first rotating transmission member is rotatably connected to the lock housing through the positioning shaft. A torsion spring is sleeved on the positioning shaft. One end of the torsion spring is in contact with the driving plate, and the other end of the torsion spring is in contact with the first reset plate. A first limiting ring is provided above the torsion spring, and the first limiting ring limits the torsion spring on the positioning shaft.

4. A safe and reliable automatic lock according to claim 1, characterized in that: A first transmission part is provided at one end of the second rotating transmission member, and a second transmission part is provided at the other end of the second rotating transmission member. A positioning column is integrally formed in the lock shell, and the positioning column runs through the middle part of the second rotating transmission member. The second rotating transmission member is rotatably connected to the lock shell through the positioning column, and a second limiting ring is sleeved on the positioning column.

5. A safe and reliable automatic lock according to claim 1, characterized in that: A tension spring hanging rod and an unlocking driving block are respectively arranged on the circumference of the knob, a mounting column is arranged in the lock housing, and a tension spring is arranged between the tension spring hanging rod and the mounting column opposite thereto.

6. A safe and reliable automatic lock according to claim 3 or 4, characterized in that: A cover plate is provided in the lock housing, a first rotating transmission member is rotatably connected to the cover plate via a positioning shaft, a second rotating transmission member is rotatably connected to the cover plate via a positioning column, a knob is rotatably connected to the cover plate, a first lock tongue guide groove is provided on the lock housing, a second lock tongue guide groove and a detection tongue guide groove are respectively provided on the cover plate, and a circuit board is provided on the cover plate.

7. A safe and reliable automatic lock according to claim 6, characterized in that: A first lock tongue guide block matching the first lock tongue guide groove is provided at the bottom of the lock tongue bracket, and a second lock tongue guide block matching the second lock tongue guide groove is provided at the top of the lock tongue bracket.

8. A safe and reliable automatic lock according to claim 6, characterized in that: A detection tongue guide block matching the detection tongue guide groove is provided on the top of the detection tongue bracket.

9. A safe and reliable automatic lock according to claim 1, characterized in that: The lock tongue assembly includes a first lock tongue and a second lock tongue, the first lock tongue and the second lock tongue are respectively rotatably connected to the lock tongue bracket, a lock tongue limiting portion is laterally extended at one end of the first lock tongue, the lock tongue limiting portion is rhombus-shaped, two inclined surfaces of the lock tongue limiting portion are respectively lock tongue guide surfaces, the lock tongue limiting portion faces the lock tongue bracket and two adjacent side surfaces are respectively lock tongue limiting surfaces, the two lock tongue limiting surfaces are obliquely butted, a lock tongue positioning portion is laterally extended at the other end of the first lock tongue, the lock tongue positioning portion is semicircular, a side surface of the lock tongue positioning portion opposite to the lock tongue hole is the lock tongue positioning surface, the lock tongue positioning surface is perpendicular to one of the lock tongue guide surfaces of the lock tongue limiting portion, and the lock tongue limiting portion and the lock tongue positioning portion are respectively arranged on two side surfaces of the first lock tongue; The structure of the second lock tongue is the same as that of the first lock tongue, and the second lock tongue is arranged opposite to the first lock tongue.

10. A safe and reliable automatic lock according to claim 1, characterized in that: A detection tongue limiting portion is provided at one end portion extending laterally, the detection tongue limiting portion is arranged in a triangular shape, and the two inclined surfaces of the detection tongue limiting portion are respectively detection tongue guide surfaces. A detection tongue positioning portion is provided at the other end portion extending laterally, the detection tongue positioning portion is arranged in an arc shape, and the two side surfaces of the detection tongue positioning portion facing the detection tongue hole are detection tongue limiting surfaces, and the detection tongue positioning portion and the detection tongue limiting portion are respectively arranged on the two side surfaces of the detection tongue.

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