Door lock with inside reverse lock feature

Abstract

The door lock with the inside reverse lock function comprises a bolt, an inside handle, and a transmission connection between the inside handle and the bolt. When the inside handle is rotated by an operator inside the door, the bolt is retracted to realize the opening control of the door leaf. The door lock further comprises an inside control switch and a locker in transmission connection with the inside control switch. The inside control switch is arranged to have a first working position and a second working position. When the inside control switch is operated to the first working position and the door is closed after being locked, the inside control switch keeps the locker in an inside reverse lock state to lock the inside handle so that the inside handle cannot drive the bolt to retract. At the same time, the locker keeps the inside control switch in the first working position. When the inside control switch is operated to the second working position and the door is closed after being locked, the inside control switch keeps the locker in an inside unlock state to release the locking of the inside handle so that the inside handle can drive the bolt to retract. At the same time, the locker keeps the inside control switch in the second working position.

Description

Technical Field

[0001] This invention relates to a lock, and more particularly to a door lock with a deadbolt feature. Background Technology

[0002] As a core device for home security, door locks primarily function to lock and unlock doors by extending and retracting the bolt. They typically feature an inner handle located on the inside and an outer handle on the inside, each driving the bolt. With the increasing demands for enhanced security, a deadbolt function has become an essential design feature of modern door locks. This function aims to restrict the bolt's retraction through a specific mechanism, preventing unauthorized opening from the outside or accidental opening from the inside. Accordingly, deadbolt functions are divided into inner and outer deadbolt functions. The inner deadbolt function involves operating an internal control switch (such as a knob, electronic button, or inner handle) from the inside of the door to activate the lock, locking the bolt in the extended position to maintain the lock. Unless the internal control switch is reset, an operator inside the door cannot unlock the lock by manipulating the inner handle. This is commonly used to prevent accidental unlocking by children, the elderly, or pets inside the door. The external deadbolt function is controlled from inside the door by an internal control switch such as a knob, electronic button, or inner handle. It locks the bolt in the extended position to maintain the lock, preventing outsiders from unlocking the door even with a key or password. This prevents unauthorized entry and is often used in scenarios such as indoor privacy protection.

[0003] Currently, various deadbolt structures have appeared on the market. For example, the deadbolt structure of a door lock disclosed in the prior patent with patent number 202322367128.9 includes a panel, a deadbolt knob, and an elastic clamping device. The deadbolt knob includes a knob part and a plug part. The plug part is used to connect the deadbolt action control lever of the lock, and the plug part has a slot along its circumference. The elastic clamping device includes a spring and a steel ball. The steel ball is used to abut against the slot of the plug part, thereby enabling radial positioning of the deadbolt knob in the deadbolt position and the unlock position. Summary of the Invention

[0004] Analysis of the prior patent 202322367128.9 reveals that its door lock deadbolt structure uses an elastic clamping device to position the deadbolt knob, which in turn positions the deadbolt action lever to keep the door lock in either the deadbolt or unlocked state. The elastic clamping device has a rather complex structure, inevitably increasing assembly difficulty. To address the shortcomings of the prior art, one of the objectives of this invention is to simplify the internal deadbolt structure of the lock, thereby reducing installation difficulty and improving installation efficiency.

[0005] In view of this, the present invention proposes a door lock with an internal deadbolt feature, including a bolt and an inner handle. The inner handle is tractively connected to the bolt. When an operator inside the door rotates the inner handle, it can drive the bolt to retract, thereby controlling the opening of the door. The lock is characterized by further including an internal control switch and a locking device tractively connected to the internal control switch. The internal control switch is arranged to have a first working position and a second working position. When an operator inside the door operates the internal control switch to the first working position and locks and closes the door, the internal control switch keeps the locking device in an internal deadbolt state, locking the inner handle so that it cannot drive the bolt to retract. Simultaneously, the locking device also keeps the internal control switch in the first working position. When an operator inside the door operates the internal control switch to the second working position and locks and closes the door, the internal control switch keeps the locking device in an internal unlock state, releasing the lock on the inner handle so that it can drive the bolt to retract. Simultaneously, the locking device also keeps the internal control switch in the second working position.

[0006] A further technical solution may also include an outer handle, an electric controller, a clutch, and an unlocking information input device. The outer handle is connected to the locking tongue via the clutch. The clutch is controlled by the electric controller to maintain disengagement under normal conditions and temporary engagement during unlocking. The unlocking information input device is connected to the electric controller. The inner handle is not connected to the outer handle. It also includes a position sensor connected to the electronic controller. The position sensor is used to pick up the first or second working position information of the internal control switch and transmit it to the electronic controller respectively. Legitimate unlocking information is classified by the electronic controller into special-authority unlocking information and ordinary-authority unlocking information with different unlocking permission levels. By operating the internal control switch to switch between the first and second working positions, the electronic controller coordinates the control to form a dual-control characteristic of the outer and inner handles. The first control characteristic is that when an operator inside the door operates the internal control switch to the first working position and locks the door, the internal control switch keeps the lock on the inner handle, preventing the inner handle from rotating to open the door. At this time, the electronic controller receives the first working position information and only inputs the unlocking information into the unlocking information input device by the operator outside the door. When the unlocking information is identified as special-authority unlocking information, the electronic controller temporarily closes the clutch, allowing the outer handle and the latch to interact, and the door can be opened by rotating the outer handle to retract the latch. The second control feature is that when an operator inside the door operates the internal control switch to the second working position and locks the door, the internal control switch releases the lock on the inner handle, allowing the inner handle to rotate and open the door. At this time, the electronic controller receives the second working position information. If the unlocking information input by the operator outside the door to the unlocking information input device is identified as special-authority unlocking information or ordinary-authority unlocking information, the electronic controller temporarily closes the clutch, allowing the outer handle and the latch to interact, and the door can be opened by rotating the outer handle to retract the latch.

[0007] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are as follows: First, because the internal control switch allows the lock to remain in the internally locked state, while the lock also keeps the internal control switch in the first working position, and the internal control switch also allows the lock to remain in the internally unlocked state, while the lock also keeps the internal control switch in the second working position, the internal control switch and the lock have an interlocking function. This eliminates the need for a dedicated limiting structure similar to the elastic clamping device in prior patent 202322367128.9, greatly simplifying the internal locking structure of the door lock with internal locking characteristics, thus reducing installation difficulty and improving installation efficiency.

[0008] Secondly, since the inner and outer handles are not connected by a transmission mechanism, when the internal control switch is in the first working position, the locked inner handle will not obstruct the rotation of the outer handle to unlock. This provides a technical basis for outdoor operators to unlock the lock by rotating the outer handle in case of an emergency indoors. Furthermore, even if one handle is blocked by a foreign object or damaged by external force, the other handle can still be used to unlock the lock, thus improving its security.

[0009] Third, since the clutch is controlled by the electric controller to achieve long-term disengagement under normal conditions, the door is locked when it is closed, making the locking operation very convenient. Moreover, personnel outside the door who do not have legal unlocking information cannot open the door by rotating the external handle.

[0010] Fourth, since the unlocking information with legal unlocking qualifications is classified by the electronic controller into special unlocking information and ordinary unlocking information with different unlocking permission levels, when the internal control switch is in the first working position, the electronic controller can further filter out external operators without special unlocking information, in addition to filtering out external operators without legal unlocking information. In this way, by identifying and screening the identity of external operators through the electronic controller, the ability to protect indoor privacy can be improved. At the same time, in the event of an emergency, external operators with special unlocking information can quickly unlock the door and enter the room to carry out rescue, thus meeting the security requirements of the lock.

[0011] Fifth, by switching the internal control switch between the first and second working positions, and coordinating with the electrical controller to form a dual-control feature for both the outer and inner handles, the door lock is in a double-locked state when the internal control switch is in the first working position, and in an outer-locked state when the internal control switch is in the second working position. Therefore, the door lock proposed in this invention offers very convenient switching between the double-locked state and the outer-locked state, enriching the door lock's locking methods and meeting the application needs of different occasions.

[0012] Because of the above-mentioned features and advantages, this invention can be applied to door locks with anti-locking characteristics. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an intelligent door lock with anti-locking characteristics that applies the technical solution of the present invention. The lock body containing the lock tongue is omitted in the figure. Figure 2 This is a top view of the smart door lock. Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along the AA direction; Figure 4 This is a three-dimensional structural diagram of the inner handle. To clearly show the internal structure of the inner handle, the handle cover is omitted in the diagram. Figure 5 This is a three-dimensional structural diagram of the main body of the rod; Figure 6 This is a dynamic change diagram of the internal control switch and the lock, wherein in Figure a), the internal control switch is located in the second working position, and in Figure b), the internal control switch is located in the first working position; Figure 7 This is a 3D structural diagram of the battery box; Figure 8 This is a cross-sectional structural diagram of the clutch and drive unit. Detailed Implementation

[0014] The structure of the door lock with anti-locking feature according to the present invention will be further described below with reference to the accompanying drawings. Except where explicitly stated to be equivalent or alternative embodiments, the various implementation details disclosed below may be selectively applied or combined in a single embodiment even if they are not directly related or synergistic in function.

[0015] like Figures 1 to 8 As shown, this invention proposes a door lock with an internal deadbolt feature, including a bolt (not shown) and an inner handle 200. The inner handle 200 is tractively connected to the bolt. When an operator inside the door rotates the inner handle 200, it can drive the bolt to retract, thereby controlling the opening of the door. The invention is characterized by further including an internal control switch 1 and a locking device tractively connected to the internal control switch 1. The internal control switch 1 is arranged to have a first working position and a second working position. When an operator inside the door operates the internal control switch 1 to the first working position and locks and closes the door, the internal control switch 1 keeps the locking device in an internal deadbolt state, locking the inner handle 200 so that it cannot drive the bolt to retract. Simultaneously, the locking device also keeps the internal control switch 1 in the first working position. When an operator inside the door operates the internal control switch 1 to the second working position and locks and closes the door, the internal control switch 1 keeps the locking device in an internal unlocked state, releasing the locking of the inner handle 200 so that it can drive the bolt to retract. Simultaneously, the locking device also keeps the internal control switch 1 in the second working position.

[0016] The latch is a movable component mounted on the door lock. When the latch extends out of the door lock and inserts into the door frame, it can lock the door. When the latch leaves the door frame and retracts into the door lock, it can open the door. In one embodiment, the latch is a beveled latch.

[0017] In this configuration, after the door lock is installed on the door leaf, the inner handle 200 and the inner control switch 1 are located on the inner side of the door leaf, i.e., the indoor side. In specific applications, the inner control switch 1 can be a knob, button, etc. The outer handle 100, which will be discussed below, is located on the outer side of the door leaf, i.e., the outdoor side. The internal control switch 1 is connected to the locker. When the operator inside the door operates the internal control switch 1, the internal control switch 1 can directly or through an intermediate transmission mechanism drive the locker to switch between the internal locked state and the internal unlocked state.

[0018] The internal control switch 1 keeps the locking device in an internal deadbolt state, thereby locking the internal handle 200 so that it cannot drive the bolt to retract. This can be understood as follows: when the locking device is in the internal deadbolt state, the locking device locks the internal handle 200 so that it cannot be rotated, and thus the bolt cannot be driven to retract by operating the internal handle 200.

[0019] The internal control switch 1 keeps the locker in the internal unlocked state to release the lock on the internal handle 200 so that it can drive the bolt to retract. This can be understood as follows: when the locker is in the internal unlocked state, the locker cannot restrict the rotation of the internal handle 200. At this time, the bolt can be driven to retract by rotating the internal handle 200.

[0020] The internal control switch 1 allows the lock to remain in both the internal deadbolt and internal unlock states, and switches between these two states. Simultaneously, the lock also keeps the internal control switch 1 in either the first or second working position. The internal control switch 1 and the lock have an interlocking function. This eliminates the need for a dedicated limiting structure similar to the elastic clamping device in prior patent 202322367128.9, greatly simplifying the internal deadbolt structure of the door lock, reducing installation difficulty, and improving installation efficiency.

[0021] There are various structures that can achieve interlocking between the internal control switch 1 and the lock. This invention proposes the following preferred technical solution: The internal control switch 1 is a knob with a support shaft 11; the lock includes a movable rod 400 and an elastic drive member; the movable rod 400 is arranged to have an unlocked position and a locked position, and can move linearly back and forth between the unlocked and locked positions; the elastic drive member can drive the movable rod 400 to return from the locked position to the unlocked position; a limiting mechanism is provided between the support shaft 11 and the movable rod 400; the limiting mechanism includes a limiting inclined wall 42 and a limiting boss 12; the limiting inclined wall 42 and the limiting boss 12 are selectively disposed on the support shaft 11 and the movable rod 400; a positioning recess 44 is provided on the limiting inclined wall 42; the operator inside the door... During the process of rotating the internal control switch 1 from the second working position to the first working position, the limiting boss 12 pushes against the limiting inclined wall 42, driving the movable rod 400 to move to the locking position to lock the inner handle 200. Simultaneously, the limiting boss 12 is engaged with the positioning recess 44, thus keeping the internal control switch 1 in the first working position. When the operator inside the door rotates the internal control switch 1 from the first working position back to the second working position, the limiting boss 12 moves away from the positioning recess 44, and the elastic drive member drives the movable rod 400 to move back to the unlocking position to release the lock on the inner handle 200. Simultaneously, the limiting boss 12 abuts against the limiting inclined wall 42 to keep the internal control switch 1 in the second working position. When the movable rod 400 is in the unlocking position, the lock is in an internal unlocked state; when the movable rod 400 is in the locking position, the lock is in an internal deadbolt state. The elastic drive member is a spring or other elastic component. The limiting inclined wall 42 and the limiting boss 12 are selectively disposed on the support shaft 11 and the movable rod 400, respectively. This means that when the limiting inclined wall 42 is disposed on the support shaft 11, the limiting boss 12 is disposed on the movable rod 400; conversely, when the limiting boss 12 is disposed on the support shaft 11, the limiting inclined wall 42 is disposed on the movable rod 400. The limiting mechanism converts the rotational motion of the internal control switch 1 into the linear motion of the movable rod 400.

[0022] Furthermore, such as Figure 5 and Figure 6As shown, the limiting mechanism includes a pair of limiting inclined walls 42, with a limiting groove 43 formed between the pair of limiting inclined walls 42. The limiting boss 12 is arrow-shaped and has a pair of boss inclined surfaces 121. When the internal control switch 1 is in the second working position, the limiting boss 12 is inserted into the limiting groove 43, and the pair of limiting inclined walls 42 and the pair of boss inclined surfaces 121 abut against each other. In this way, without the restriction of other radial limiting mechanisms, the internal control switch 1 can rotate in either the forward or reverse direction to drive the movable rod 400 to move. In one embodiment, the pair of limiting inclined walls 42 and the pair of boss inclined surfaces 121 have the same inclination, which can further enhance the limiting stability of the internal control switch 1 and reduce the radial loosening of the internal control switch 1. Secondly, the pair of limiting inclined walls 42 and the pair of protruding inclined surfaces 121 abut against each other, which can be understood as the limiting inclined walls 42 located on the left abutting against the protruding inclined surfaces 121, and the limiting inclined walls 42 located on the right abutting against the protruding inclined surfaces 121.

[0023] Furthermore, such as Figure 3 , 4 As shown in Figure 7, the internal control switch 1 and the locking device are disposed on the inner handle 200. The inner handle 200 includes a handle cavity 20, within which a battery compartment 5 is disposed. The battery compartment 5 includes at least one pair of battery chambers 50 for storing batteries and a partition wall 51 arranged between the pair of battery chambers 50. A notch for placing the movable rod 400 is provided on the partition wall 51, and guide grooves 52 are respectively provided on the left and right side walls of the notch. The movable rod 400 includes a pair of guide wings 47, which are slidably disposed on the pair of guide grooves 52. In this way, the spare space of the pair of battery chambers 50 is flexibly utilized to provide installation and movement space for the movable rod 400, which is beneficial to the compact size of the inner handle 200. The batteries stored in the battery chambers 50 can supply power to the electric controller mounted on the outer handle 100, which will be discussed below. The guide groove 52 not only provides movement guidance for the movement of the movable rod 400, but also prevents the movable rod 400 from rotating.

[0024] Furthermore, such as Figure 3 , 4 and Figure 7As shown, the inner handle 200 includes a handle cover 2 and a handle base 21 that are separately configured. The handle cavity 20 is formed between the handle cover 2 and the handle base 21. The battery compartment 5 is mounted on the handle base 21. A conductive spring (not shown in the figure) is provided on the inner side wall of the handle cover 2. The two ends of the conductive spring are respectively provided with bent portions, which are used to electrically connect with the battery placed in the battery compartment 5. The internal control switch 1 is provided on the handle cover 2. In this way, after removing the handle cover 2, the battery can be easily installed into the battery compartment 5. In one embodiment, a retaining ring 13 is fitted on the support shaft 11 of the internal control switch 1. The outer edge 12 of the internal control switch 1 and the retaining ring 13 axially position the internal control switch 1 on the handle cover 2, but do not hinder the rotation of the internal control switch 1.

[0025] Furthermore, such as Figure 4 As shown, a circuit board 6 is also provided inside the handle cavity 20. The circuit board 6 is mounted on the battery box 5 and blocks the upper opening of at least one of the guide grooves 52, thereby preventing the guide wing 47 from detaching upward from the guide groove 52. In one embodiment, an electric controller (not shown in the figure) is also included. A position sensor 60 is mounted on the circuit board 6. The position sensor 60 is used to pick up the first working position information or the second working position information of the internal control switch 1 and transmit it to the electric controller respectively. In this way, the circuit board 6 serves a dual purpose: it not only provides a mounting base for the position sensor 60, but also prevents the guide wing 47 from detaching upward from the guide groove 52, thereby improving the installation stability of the movable rod 400.

[0026] The following is in conjunction with the appendix Figure 3 , 5Section 6 provides a further detailed description of the operation of one type of door lock internal locking mechanism using the above-mentioned technical solution: The door lock also includes a handle fixing seat 7, and the internal handle 200 is rotatably mounted on the handle fixing seat 7. The movable rod 400 includes a separate rod body 4 and an insert arm 41. The insert arm 41 can be inserted into the handle fixing seat 7 under the drive of the rod body 4, and the rotation axis of the insert arm 41 does not overlap with that of the internal handle 200. A pair of guide wings 47 are respectively disposed on the rod body 4 and slidably disposed on a pair of guide grooves 52 of the battery box 5. The top end of the rod body 4 is directly opposite the bottom end of the support shaft 11 of the internal control switch 1. The limiting groove 43 is disposed on the top end of the rod body 4, and the limiting boss 12 is disposed on the bottom end of the support shaft 11. The elastic driving member includes a first spring 45 for driving the rod body 4 to move and reset and a second spring 46 for driving the insert arm 41 to move and reset. When the internal control switch 1 is in the second working position, under the pushing action of the first spring 45, the limiting groove 43 of the rod body 4 keeps the limiting boss 12 contained within it. The limiting boss 12 is locked in the limiting groove 43. A pair of limiting inclined walls 42 and a pair of boss inclined surfaces 121 abut against each other. Utilizing the linear movement characteristic of the rod body 4, which can only move linearly and cannot rotate, the rotation of the limiting boss 12 is prevented, thereby keeping the internal control switch 1 in the second working position. The insert arm 41, driven by the second spring 46, moves away from the handle fixing seat 7, releasing the lock on the inner handle 200. When the operator inside the door rotates the internal control switch 1 from the second working position to the first working position (approximately 90°), the tail end 122 of the limiting boss 12 pushes against the limiting inclined wall 42, causing the rod body 4 to move downwards and drive the insertion arm 41 to insert into the handle fixing seat 7. Meanwhile, the positioning recess 44 on the limiting inclined wall 42 gradually approaches the tail end 122 of the limiting boss 12. When the tail end 122 of the limiting boss 12 engages with the positioning recess 44, the internal control switch 1 is held in the first working position. In this way, the rotational movement of the internal control switch 1 is converted into the linear movement of the rod body 4 through the cooperation of the limiting inclined wall 42 and the limiting boss 12. During this process, the elastic drive component deforms under force. When the internal control switch 1 rotates from the first working position back to the second working position, the limiting boss 12 leaves the positioning recess 44, the first spring 45 drives the rod body 4 to reset and the limiting groove 43 keeps the limiting boss 12 in place again, while the second spring 46 drives the insert arm 41 to leave the handle fixing seat 7, thereby releasing the lock on the inner handle 200.

[0027] The door lock proposed in this invention not only achieves an inner deadbolt function but also a simultaneous outer deadbolt function. Further, it includes an outer handle 100, an electric controller, a clutch 8, and an unlocking information input device 101. The outer handle 100 is driven to the bolt via the clutch 8. The clutch 8 is controlled by the electric controller to remain disengaged under normal conditions and temporarily engaged during unlocking. The unlocking information input device 101 is connected to the electric controller. The inner handle 200 is not driven to the outer handle 100. It also includes a position sensor 60 connected to the electric controller, which is used to pick up... The first or second working position information of the internal control switch 1 is obtained and transmitted to the electric controller respectively. The electric controller classifies legitimate unlocking information into special-authority unlocking information and ordinary-authority unlocking information with different unlocking permission levels. By operating the internal control switch 1 to switch between the first and second working positions, the electric controller coordinates the control to form a dual-control characteristic of the outer handle 100 and the inner handle 200. The first control characteristic is that after the operator inside the door operates the internal control switch 1 to the first working position and locks and closes the door, the internal control switch... 1. The locking device keeps the inner handle 200 locked, preventing the inner handle 200 from rotating to open the door. At this time, the electric controller receives the first working position information. Only when the unlocking information input by the operator outside the door to the unlocking information input device 101 is recognized as special authorization unlocking information, the electric controller controls the clutch 8 to temporarily close, thereby allowing the outer handle 100 to form a linkage with the bolt, and can retract the bolt by rotating the outer handle 100 to achieve door opening control; the second control characteristic is that the operator inside the door operates the inner control switch 1 in the position of In the second working position, after locking and closing the door, the internal control switch 1 releases the lock on the inner handle 200, allowing the inner handle 200 to rotate and open the door. At this time, the electric controller receives the second working position information. If the unlocking information input by the operator outside the door to the unlocking information input device 101 is identified as special access unlocking information or ordinary access unlocking information, the electric controller controls the clutch 8 to temporarily close, thereby allowing the outer handle 100 to form a linkage with the bolt and enabling the bolt to retract by rotating the outer handle 100, thus realizing the opening control of the door.

[0028] The clutch 8 is controlled by the electric controller to maintain disengagement under normal conditions and temporary engagement during unlocking. This can be understood as follows: under the control of the electric controller, the clutch 8 is normally disengaged, the outer handle 100 and the latch cannot be linked, and rotating the outer handle 100 cannot unlock the door. Only when the unlocking information input by the operator outside the door to the unlocking information input device 101 is recognized as valid unlocking information does the clutch 8 switch to the engaged state under the control of the electric controller and maintain this engagement for a period of time, for example, 5 seconds. During these 5 seconds, the outer handle 100 and the latch are linked, and rotating the outer handle 100 unlocks the door. After these 5 seconds, the clutch 8 returns to the disengaged state under the control of the electric controller. Furthermore, various clutches suitable for the technical solution of this invention are currently available on the market, as long as they can switch the inner handle 200 and the latch between linked and non-linked states. In one embodiment, such as... Figure 8 As shown, the clutch 8 includes an outer clutch 81, an inner clutch 82, a movable pin 83 mounted on the outer clutch 81, and a return spring (not shown) that drives the movable pin 83 to move and reset. The outer clutch 81 is fixedly connected to the outer handle 100, and the inner clutch 82 is fixedly connected to the drive shaft. It also includes a drive device 84. When the drive device 84 drives the movable pin 83 to extend and insert into the inner clutch 82, the clutch 8 closes, and the outer clutch 81 and inner clutch 82 are linked, allowing the operator outside the door to retract the latch by rotating the outer handle 100. After the drive device 84 resets, the movable pin 83, driven by the return spring, resets and leaves the inner clutch 82, disengaging the clutch 8. The outer clutch 81 and inner clutch 82 are no longer linked, and the operator outside the door cannot retract the latch by rotating the outer handle 100. The drive shaft is either the first drive shaft 31 or the second drive shaft 32, which will be discussed further below. The clutch 8 and the drive device 84 can adopt the technical solution disclosed in the prior patent WO2023173476A1.

[0029] The structure of the unlocking information input device 101 can be varied. For example, it can be a biometric feature acquisition device such as a fingerprint acquisition device, a face recognition camera, or a vein recognition device; or a password input device such as a numeric keypad or a password panel for inputting passwords; or a short-range wireless communication device such as an NFC signal reader for reading electronic password signals.

[0030] The inner handle 200 and the outer handle 100 are not connected in a transmission manner. Therefore, there is no power transmission between them; rotating one handle will not cause the other to rotate, and locking one handle will not impede the rotation of the other. However, this does not preclude the possibility that the inner handle 200 and the outer handle 100 are connected together. Furthermore, it also includes a first drive shaft 31 and a second drive shaft 32, which are separately configured, and a connecting rod 3 that connects them together; the shaft end 310 of the first drive shaft 31 is provided with a shaft end hole (…). Figure 3 (The part is obscured by the tail end of the connecting rod 3 and is therefore not marked). The tail end of the connecting rod 3 is inserted into the shaft end hole, while the head end is provided with a radial protrusion 301. The second drive shaft 32 is hollow and is sleeved on the connecting rod 3, and is axially limited between the radial protrusion 301 and the shaft end 310 of the first drive shaft 31. The second drive shaft 32 and the first drive shaft 31 are not connected in the radial direction. It also includes a first lever 33 that is connected in drive to the first drive shaft 31. The first lever 33 can rotate under the drive of the first drive shaft 31 to move the latch to retract. It also includes a second lever 34 that is connected in drive to the second drive shaft 32. The second lever 34 can rotate under the drive of the second drive shaft 32 to move the latch to retract. The inner handle 200 and the outer handle 100 are connected in drive to the first drive shaft 31 and the second drive shaft 32 respectively in an alternative manner. In one embodiment, the inner handle 200 is fixedly connected to the second drive shaft 32, and the inner clutch 82 is fixedly connected to the first drive shaft 31; alternatively, the inner handle 200 can be fixedly connected to the first drive shaft 31, and the inner clutch 82 can be fixedly connected to the second drive shaft 32. The second drive shaft 32 and the first drive shaft 31 are not radially connected, meaning that when one of the drive shafts rotates, it does not drive the other drive shaft to rotate; similarly, when one drive shaft is locked and cannot rotate, it does not hinder the rotation of the other drive shaft.

[0031] In specific applications, the position sensor 60 can be a Hall effect sensor. A magnetic component matching the Hall effect sensor is provided on the internal control switch 1. When the magnetic component approaches the Hall effect sensor, it triggers the Hall effect sensor to transmit a position signal, either the first or second working position information of the internal control switch 1, to the electronic controller. The position sensor 60 can also be a micro switch, etc.

[0032] The special access unlocking information is controlled by a specially authorized administrator and can be the fingerprints, passwords, or other information of one or more administrators. When the internal control switch 1 is in the first working position, emergency unlocking is permitted from outside the door by entering the special access unlocking information. The ordinary access unlocking information is controlled by a general administrator and can also be the fingerprints, passwords, or other information of one or more administrators.

[0033] When the operator inside the door operates the internal control switch 1 to the first working position and locks the door, the operator inside cannot open the door by rotating the internal handle 200, thereby reducing the risk of children, pets, etc., accidentally leaving the room. If the unlocking information input by the operator outside the door to the unlocking information input device 101 is not recognized as the special authorization unlocking information, the clutch 8 remains disengaged. Although the operator outside the door can rotate the external handle 100, the bolt cannot retract, and the smart door lock is in a double-locked state. Only when the unlocking information input by the operator outside the door to the unlocking information input device 101 is recognized as the special authorization unlocking information will the electronic controller control the clutch 8 to switch from the disengaged state to a temporary closed state. At this time, rotating the external handle 100 will retract the bolt to achieve emergency unlocking. Furthermore, after the operator inside the door operates the internal control switch 1 to the second working position and locks the door, the operator inside can open the door by rotating the internal handle 200. If the unlocking information input by the operator outside the door to the unlocking information input device 101 is identified as either special access unlocking information or ordinary access unlocking information, the electronic controller controls the clutch 8 to switch from a disengaged state to a temporarily closed state. At this time, rotating the external handle 100 will retract the bolt to unlock the door. It should be noted that during the unlocking information identification process, it is possible that the unlocking information input device 101 pre-identifies the input unlocking information and only sends the information to the electronic controller when a valid unlocking message is identified; alternatively, it is possible that the unlocking information input device 101 sends the received unlocking information to the electronic controller, which then performs the identification itself.

Claims

1. A door lock with an internal deadbolt feature, comprising a bolt and an inner handle, wherein the inner handle is operatively connected to the bolt, and when an operator inside the door rotates the inner handle, the bolt is retracted, thereby controlling the opening of the door; characterized in that, It also includes an internal control switch and a locking device kinetically connected to the internal control switch. The internal control switch is arranged to operate in a first working position and a second working position. When an operator inside the door operates the internal control switch to the first working position and locks and closes the door, the internal control switch keeps the locking device in an inside deadbolt state to lock the inside handle so that it cannot drive the bolt to retract. At the same time, the locking device also keeps the internal control switch in the first working position. When an operator inside the door operates the internal control switch to the second working position and locks and closes the door, the internal control switch keeps the locking device in an inside unlock state to release the lock on the inside handle so that it can drive the bolt to retract. At the same time, the locking device also keeps the internal control switch in the second working position.

2. The door lock according to claim 1, characterized in that, The internal control switch is a knob with a support shaft. The locking device includes a movable rod and a spring-loaded drive member. The movable rod is arranged to operate in an unlocked position and a locked position, and can move linearly back and forth between the unlocked and locked positions. The spring-loaded drive member can drive the movable rod to return from the locked position to the unlocked position. A limit mechanism is provided between the support shaft and the movable rod. The limit mechanism includes a limiting inclined wall and a limiting boss, which are selectively disposed on the support shaft and the movable rod. A positioning recess is provided on the limiting inclined wall. The operator inside the door operates the internal control switch to rotate it from the second working position to... During the first working position, the limiting boss pushes against the limiting inclined wall, driving the movable rod to move to the locking position to lock the inner handle. At the same time, the limiting boss is locked on the positioning recess, thus keeping the internal control switch in the first working position. When the operator inside the door operates the internal control switch to rotate it from the first working position back to the second working position, the limiting boss leaves the positioning recess, and the elastic drive member drives the movable rod to move back to the unlocking position to release the lock on the inner handle. At the same time, the limiting boss abuts against the limiting inclined wall to keep the internal control switch in the second working position.

3. The door lock according to claim 2, characterized in that, The limiting mechanism includes a pair of limiting inclined walls, a limiting groove is formed between the pair of limiting inclined walls, and the limiting boss is arrow-shaped and has a pair of boss inclined surfaces; when the internal control switch is in the second working position, the limiting boss is inserted into the limiting groove, and the pair of limiting inclined walls and the pair of boss inclined surfaces abut against each other one by one.

4. The door lock according to claim 3, characterized in that, The positioning recess is located at the top of the limiting inclined wall and has an inclined pit sidewall. The limiting boss can push the movable rod away from the support shaft by pushing the pit sidewall, thereby causing the limiting boss to disengage from the positioning recess.

5. The door lock according to claim 2, characterized in that, The elastic driving component is a spring.

6. The door lock according to claim 2, characterized in that, The internal control switch and lock are disposed on the inner handle; the inner handle includes a handle cavity, and a battery compartment is disposed in the handle cavity. The battery compartment includes at least one pair of battery chambers for storing batteries and a partition wall disposed between the pair of battery chambers. A notch for placing the movable rod is provided on the partition wall, and guide grooves are respectively provided on the left and right side walls of the notch; the movable rod includes a pair of guide wings, and the pair of guide wings are slidably disposed on the pair of guide grooves.

7. The door lock according to claim 6, characterized in that, The inner handle includes a handle cover and a handle base that are separately configured. The handle cavity is formed between the handle cover and the handle base. The battery box is mounted on the handle base. A conductive spring is provided on the inner side wall of the handle cover. The two ends of the conductive spring are respectively provided with bent portions. The bent portions are used to electrically connect with the battery placed in the battery box. The internal control switch is provided on the handle cover.

8. The door lock according to claim 6, characterized in that, A circuit board is also provided inside the handle cavity. The circuit board is mounted on the battery box and blocks the upper opening of at least one of the guide grooves, thereby preventing the guide wing from detaching upward from the guide groove.

9. The door lock according to any one of claims 1 to 8, characterized in that, It also includes an outer handle, an electric controller, a clutch, and an unlocking information input device. The outer handle is connected to the locking tongue via the clutch. The clutch is controlled by the electric controller to maintain disengagement under normal conditions and temporary engagement during unlocking. The unlocking information input device is connected to the electric controller. The inner handle is not connected to the outer handle. It also includes a position sensor connected to the electronic controller. The position sensor is used to pick up the first or second working position information of the internal control switch and transmit it to the electronic controller respectively. Legitimate unlocking information is classified by the electronic controller into special-authority unlocking information and ordinary-authority unlocking information with different unlocking permission levels. By operating the internal control switch to switch between the first and second working positions, the electronic controller coordinates the control to form a dual-control characteristic of the outer and inner handles. The first control characteristic is that when an operator inside the door operates the internal control switch to the first working position and locks the door, the internal control switch keeps the lock on the inner handle, preventing the inner handle from rotating to open the door. At this time, the electronic controller receives the first working position information and only inputs the unlocking information into the unlocking information input device by the operator outside the door. When the unlocking information is identified as special-authority unlocking information, the electronic controller temporarily closes the clutch, allowing the outer handle and the latch to interact, and the door can be opened by rotating the outer handle to retract the latch. The second control feature is that when an operator inside the door operates the internal control switch to the second working position and locks the door, the internal control switch releases the lock on the inner handle, allowing the inner handle to rotate and open the door. At this time, the electronic controller receives the second working position information. If the unlocking information input by the operator outside the door to the unlocking information input device is identified as special-authority unlocking information or ordinary-authority unlocking information, the electronic controller temporarily closes the clutch, allowing the outer handle and the latch to interact, and the door can be opened by rotating the outer handle to retract the latch.

10. The door lock according to claim 9, characterized in that, It also includes a first drive shaft and a second drive shaft that are separately configured, and a connecting rod that connects them together; the first drive shaft has a shaft end hole at its shaft end, the tail end of the connecting rod is inserted into the shaft end hole, and the head end has a radial protrusion; the second drive shaft is hollow and is sleeved on the connecting rod, and is axially limited between the radial protrusion and the shaft end of the first drive shaft; the second drive shaft and the first drive shaft are not connected in the radial direction; it also includes a first lever that is connected in drive to the first drive shaft, and the first lever can rotate under the drive of the first drive shaft to retract the latch; it also includes a second lever that is connected in drive to the second drive shaft, and the second lever can rotate under the drive of the second drive shaft to retract the latch; the inner handle and the outer handle are selectively connected in drive to the first drive shaft and the second drive shaft, respectively.

11. The door lock according to claim 10, characterized in that, The unlocking information input device is a biometric feature acquisition device, a password input device for inputting passwords, or a short-range wireless communication device for reading electronic password signals.

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