Door lock

Abstract

The utility model discloses a door lock which comprises a lock shell, a spring bolt assembly, a transmission assembly, a spring bolt driving assembly, an unlocking shifting block and an elastic reset piece. When the unlocking shifting block rotates to the unlocking position, the driving block drives the matching block to enable the transmission frame to move, and then the spring bolt assembly can retract into the lock shell. When the elastic reset piece drives the transmission frame to reset, the transmission frame pushes the unlocking shifting block to rotate and reset to a reset position; when the unlocking shifting block is located at the reset position, the driving block and the matching block are in surface contact, contact point abrasion between the driving block and the matching block is not prone to occurring, even if local abrasion occurs, overall surface contact positioning is not affected, and the unlocking shifting block can still be reset accurately after being used for a long time.

Description

Technical Field

[0001] This utility model relates to hotel door locks, and more particularly to a type of door lock. Background Technology

[0002] Some existing hotel door locks include a lock housing, a bolt assembly, a transmission assembly, a bolt drive assembly, a lock pick, and a resilient reset mechanism. The bolt assembly can extend and retract relative to the lock housing. The transmission assembly includes a transmission frame slidably mounted on the lock housing, which drives the bolt assembly to retract into the lock housing. The bolt drive assembly drives the bolt assembly to extend out of the lock housing. The lock pick is linked to the handle via a clutch assembly. When the lock pick rotates, it pushes the transmission frame to move, driving the bolt assembly to retract into the lock housing, thus opening the door. After releasing the handle, the resilient reset mechanism drives the transmission frame to return to its original position. When the transmission frame returns to its original position, it pushes the lock pick to rotate and return to its original position. At this time, the bolt drive assembly can again drive the bolt assembly to extend. Typically, the lock pick and transmission frame have point or line contact friction. Over time, wear can occur at the contact points, creating a small gap between the lock pick and the transmission frame, preventing the lock pick from accurately returning to its original position. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a door lock in which the unlocking dial can still accurately reset after prolonged use.

[0004] A door lock according to an embodiment of the present invention includes a lock housing, a bolt assembly, a transmission assembly, a bolt drive assembly, an unlocking dial, and a resilient reset member. The bolt assembly is retractably disposed on the lock housing; the transmission assembly is disposed on the lock housing, and the transmission assembly includes a transmission frame, which is movably disposed on the lock housing and can drive the bolt assembly to retract into the lock housing, and the transmission frame is provided with a mating block; the bolt drive assembly is disposed on the lock housing and is used to drive the bolt assembly to extend out of the lock housing; the unlocking dial is rotatably disposed on the lock housing, and the unlocking dial is provided with a drive block, the drive block abutting against the mating block; the unlocking dial has a reset position and an unlocking position; in the reset position, the drive block is in surface contact with the mating block; in the unlocking position, the unlocking dial pushes the mating block through the drive block to drive the transmission frame to move; the resilient reset member is disposed on the lock housing and can drive the transmission frame to reset and move.

[0005] The door lock according to the embodiments of this utility model has at least the following beneficial effects: when the unlocking dial is rotated to the unlocking position, the driving block drives the mating block to move the transmission frame, thereby allowing the lock tongue assembly to retract into the lock case; when the elastic reset member drives the transmission frame to reset, the transmission frame pushes the unlocking dial to rotate and reset to the reset position; when the unlocking dial is in the reset position, the driving block and the mating block are in surface contact, and it is not easy for the contact point between the two to wear. Even if local wear occurs, it will not affect the overall surface contact positioning, so that the unlocking dial can still accurately reset after long-term use.

[0006] According to some embodiments of the present invention, the unlocking dial is provided with two driving blocks, which are respectively placed on opposite sides of the rotation axis of the unlocking dial. The transmission frame is provided with two mating blocks. When the unlocking dial is in the reset position, the two driving blocks and the two mating blocks abut against each other.

[0007] According to some embodiments of the present invention, the driving block is provided with an abutment surface for contacting the mating block, and the abutment surfaces of the two driving blocks are parallel to each other.

[0008] According to some embodiments of this utility model, it further includes a handle lever and a clutch assembly. The handle lever is rotatably disposed on the lock housing, and the rotation axis of the handle lever is collinear with the rotation axis of the unlocking lever. The handle lever is provided with a handle mounting portion. The clutch assembly is disposed on the lock housing and has an engaged state and a disengaged state. In the engaged state, the handle lever and the unlocking lever rotate synchronously; in the disengaged state, the handle lever can rotate relative to the unlocking lever.

[0009] According to some embodiments of the present invention, the clutch assembly includes a clutch driver, a clutch reset member, and a clutch member. The clutch member is radially movably disposed on the unlocking dial along the rotation axis of the unlocking dial. The handle dial is provided with a mating groove. The clutch driver is used to drive the clutch member to be inserted into the mating groove to enter the engaged state. The clutch reset member is used to drive the clutch member to disengage from the mating groove to enter the disengaged state.

[0010] According to some embodiments of this utility model, the unlocking dial is provided with a receiving hole along the rotation axis, the handle dial is embedded in the receiving hole, the handle dial is provided with a clutch mounting hole in the radial direction along the rotation axis, the clutch element slides through the clutch mounting hole, and one end of the clutch mounting hole extends through the hole wall of the receiving hole.

[0011] According to some embodiments of the present invention, the unlocking dial further includes a rotating shaft block, the rotating shaft block being rotatably connected to the lock housing about the rotation axis of the unlocking dial, the driving block being connected to the outer periphery of the rotating shaft block, the clutch being slidably connected to the driving block, one end of the clutch being opposite to the rotation axis of the unlocking dial extending out of the driving block, the clutch actuator being located outside the unlocking dial, and the clutch actuator being opposite to the clutch.

[0012] According to some embodiments of the present invention, it further includes a card reader and a battery assembly, wherein the card reader is disposed in the lock housing and electrically connected to the clutch driver, and the battery assembly is disposed in the lock housing and can supply power to the clutch driver and the card reader.

[0013] According to some embodiments of the present invention, the latch assembly includes a slanted latch, which is slidably connected to the lock housing; the transmission assembly includes a first transmission member, which is rotatably connected to the lock housing; the transmission frame can drive the first transmission member to rotate and push the slanted latch into the lock housing through one end of the first transmission member; the latch driving assembly includes a first elastic member, which is disposed on the lock housing and used to drive the slanted latch to extend out of the lock housing.

[0014] According to some embodiments of this utility model, the latch assembly includes a deadbolt, which is slidably connected to the lock housing in the left-right direction. The transmission assembly includes a second transmission member, which is rotatably connected to the lock housing. The second transmission member is provided with a slider portion, and the deadbolt is provided with a groove. The groove is inclined relative to the left-right direction, and the slider portion is slidably connected to the groove. When the second transmission member rotates in the forward direction, it drives the deadbolt to extend through the slider portion. When the second transmission member rotates in the reverse direction, it drives the deadbolt to retract through the slider portion. The transmission frame can drive the second transmission member to rotate in the reverse direction. The latch driving assembly also includes a second elastic member, which is disposed on the lock housing and can drive the second transmission member to rotate in the forward direction.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a perspective view of a door lock according to an embodiment of the present utility model;

[0018] Figure 2This is a rear view schematic diagram of a portion of the structure of the door lock according to an embodiment of the present utility model;

[0019] Figure 3 This is a perspective view of the transmission frame, unlocking lever, handle lever, and clutch assembly according to an embodiment of the present utility model.

[0020] Figure 4 This is an embodiment of the present utility model. Figure 3 A cross-sectional view of the unlocking lever, handle lever, and clutch assembly along the AA direction;

[0021] Figure 5 This is an exploded view of the unlocking lever and handle lever of an embodiment of the present utility model.

[0022] Figure label:

[0023] Lock case 100;

[0024] Locking tongue assembly 200, oblique latch 210, anti-locking latch 220;

[0025] Transmission assembly 300, transmission frame 310, mating block 311, first transmission component 320, second transmission component 330;

[0026] First elastic element 410, second elastic element 420;

[0027] Unlocking dial 500, receiving hole 501, clutch mounting hole 502, drive block 510, abutment surface 511, rotating shaft block 520;

[0028] Handle and dial head 600, mating groove 610;

[0029] Clutch assembly 700, clutch actuator 710, clutch reset component 720, clutch component 730;

[0030] Battery assembly 800. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Reference Figures 1 to 5 This door lock, an embodiment of the present invention, includes a lock housing 100, a bolt assembly 200, a transmission assembly 300, a bolt drive assembly, an unlocking dial 500, and an elastic reset member. The bolt assembly 200 is retractably mounted on the lock housing 100; the transmission assembly 300 is mounted on the lock housing 100 and includes a transmission frame 310, which is movably mounted on the lock housing 100 and drives the bolt assembly 200 to retract into the lock housing 100. The transmission frame 310 is provided with a mating block 311; the bolt drive assembly is mounted on the lock housing 100 and drives the bolt assembly 200 to extend out of the lock housing 100; the unlocking dial 500 is rotatably mounted. In the lock housing 100, the unlocking dial 500 is provided with a driving block 510, which abuts against the mating block 311. The unlocking dial 500 has a reset position and an unlocking position. In the reset position, the driving block 510 is in surface contact with the mating block 311. In the unlocking position, the unlocking dial 500 pushes the mating block 311 through the driving block 510 to drive the transmission frame 310 to move. An elastic reset member is provided in the lock housing 100 and can drive the transmission frame 310 to reset and move.

[0036] When the unlocking dial 500 rotates to the unlock position, the driving block 510 drives the mating block 311, causing the transmission frame 310 to move, thereby allowing the lock tongue assembly 200 to retract into the lock case 100. When the elastic reset member drives the transmission frame 310 to reset, the transmission frame 310 pushes the unlocking dial 500 to rotate and reset to the reset position. When the unlocking dial 500 is in the reset position, the driving block 510 and the mating block 311 are in surface contact, and it is not easy for the contact point to wear to occur between them. Even if local wear occurs, it will not affect the overall surface contact positioning, so that the unlocking dial 500 can still accurately reset after long-term use.

[0037] Specifically, the latch assembly 200 is slidably connected to the lock housing 100 via a guide hole structure. It can be understood that the latch assembly 200 can also be movably connected to the lock housing 100 via a guide post and guide sleeve structure.

[0038] In this embodiment, the unlocking dial 500 is provided with two driving blocks 510, which are positioned on opposite sides of the rotation axis of the unlocking dial 500. The transmission frame 310 is provided with two mating blocks 311. When the unlocking dial 500 is in the reset position, the two driving blocks 510 and the two mating blocks 311 abut against each other. When the unlocking dial 500 is in the reset position, the driving blocks 510 on both sides abut against the two mating blocks 311 of the transmission frame 310 respectively. The transmission frame 310 can maintain the force balance of the two driving blocks 510 of the unlocking dial 500 through the two mating blocks 311, so that the unlocking dial 500 can be kept in an accurate reset position. This further increases the contact area between the unlocking dial 500 and the transmission frame 310, reducing the contact pressure and wear between the two. Furthermore, the unlocking dial 500 can rotate in both directions by abutting against the corresponding mating block 311 of the transmission frame 310 through one of the driving blocks 510, allowing the transmission frame 310 to move and making it relatively flexible to use.

[0039] In this embodiment, the drive block 510 is provided with an abutment surface 511 for contacting the mating block 311. The abutment surfaces 511 of the two drive blocks 510 are parallel to each other, which makes it easier to accurately reset the unlocking dial 500 and make the unlocking dial 500 more balanced in terms of force.

[0040] In this embodiment, the lock also includes a handle lever 600 and a clutch assembly 700. The handle lever 600 is rotatably mounted on the lock housing 100, and the rotation axis of the handle lever 600 is collinear with the rotation axis of the unlocking lever 500. The handle lever 600 is provided with a handle mounting portion. The clutch assembly 700 is mounted on the lock housing 100 and has an engaged state and a disengaged state. In the engaged state, the handle lever 600 and the unlocking lever 500 rotate synchronously; in the disengaged state, the handle lever 600 can rotate relative to the unlocking lever 500.

[0041] The handle lever head 600 can be used to mount the handle via a handle mounting part, which is a square hole. When the clutch assembly 700 is in the disengaged state, if the user turns the handle, the handle lever head 600 will rotate relative to the unlocking lever head 500, meaning the handle is in a free-spinning state and cannot drive the transmission frame 310 to move for unlocking. When the clutch assembly 700 is in the engaged state, the handle lever head 600 and the unlocking lever head 500 rotate synchronously. That is, when the handle is turned, the handle lever head 600 can drive the unlocking lever head 500 to rotate, thereby driving the transmission frame 310 to move for unlocking. The accurate reset position of the unlocking lever head 500 allows the clutch assembly 700 to smoothly switch between the engaged and disengaged states, avoiding the risk of the clutch assembly 700 being unable to switch between the engaged and disengaged states, and the clutch assembly 700 provides better security for the door lock.

[0042] In this embodiment, the clutch assembly 700 includes a clutch driver 710, a clutch reset member 720, and a clutch member 730. The clutch member 730 is radially movably disposed on the unlocking dial 500 along the rotation axis of the unlocking dial 500. The handle dial 600 is provided with a mating groove 610. The clutch driver 710 is used to drive the clutch member 730 to be inserted into the mating groove 610 to enter the engaged state. The clutch reset member 720 is used to drive the clutch member 730 to disengage from the mating groove 610 to enter the disengaged state.

[0043] The aforementioned clutch assembly 700 can relatively easily switch the engagement state to allow the handle lever 600 and the unlocking lever 500 to rotate synchronously, and switch the disengagement state to allow the handle lever 600 to rotate freely. It has a simple structure and is easy to implement.

[0044] In this embodiment, the unlocking dial 500 has a receiving hole 501 along the rotation axis, the handle dial 600 is embedded in the receiving hole 501, and the handle dial 600 has a clutch mounting hole 502 radially along the rotation axis. The clutch element 730 slides through the clutch mounting hole 502, and one end of the clutch mounting hole 502 extends through the wall of the receiving hole 501. The handle dial 600 is embedded in the receiving hole 501 of the unlocking dial 500, which makes the structural layout of both more compact and helps to reduce the size of the door lock.

[0045] In this embodiment, the unlocking dial 500 further includes a rotating shaft block 520, which is rotatably connected to the lock housing 100 about the rotation axis of the unlocking dial 500. A drive block 510 is connected to the outer periphery of the rotating shaft block 520. A clutch 730 is slidably connected to the drive block 510. One end of the clutch 730 that is away from the rotation axis of the unlocking dial 500 extends out of the drive block 510. A clutch actuator 710 is located on the outside of the unlocking dial 500 and is opposite to the clutch 730.

[0046] The unlocking dial 500 includes a rotating shaft block 520 and a drive block 510 connected to the outer periphery of the rotating shaft block 520. The unlocking dial 500 has a relatively simple structure and is easy to manufacture. The clutch 730 is slidably connected to the protruding drive block 510, and the clutch driver 710 is located on the outside of the unlocking dial 500, which allows the unlocking dial 500 to be made smaller and is conducive to a compact structural layout of the clutch 730 and the unlocking dial 500.

[0047] Specifically, the clutch 730 is a pin. It is conceivable that in some other embodiments, the clutch 730 may also be a plug, which is slidably connected to the unlocking head 500 through a slide rail slider structure. In this case, the handle head 600 is still provided with a mating groove 610. The engagement state and the unlocking state are switched by inserting or disengaging the plug into or from the mating groove 610.

[0048] Specifically, the lever head 600 has four mating grooves 610 arranged around the rotation axis, making assembly relatively flexible.

[0049] Specifically, the clutch actuator 710 can adopt a linear drive structure such as a magnetostrictive actuator or a miniature electric push rod, and cooperate with a baffle to push the clutch 730 into the mating groove 610. When the unlocking dial 500 rotates, the baffle keeps pushing the clutch 730 and maintaining it in the engaged state. The clutch reset member 720 can be, for example, a spring or an elastic rubber block. When the clutch actuator 710 stops pushing the clutch 730, the clutch reset member 720 pushes the clutch 730 out of the mating groove 610.

[0050] It is conceivable that in other embodiments, the clutch assembly 700 may have other structures. For example, the clutch assembly 700 includes an electric push rod, which is fixed to the unlocking lever 500 and rotates with the unlocking lever 500. One end of the electric push rod is inserted into a pin, and the handle lever 600 is provided with a pin hole. When the drive pin of the electric push rod is inserted into the pin hole, the two can rotate synchronously; when the electric push rod drives the pin to disengage from the pin hole, the two can rotate independently.

[0051] In this embodiment, a card reader and a battery assembly 800 are also included. The card reader is disposed in the lock housing 100 and electrically connected to the clutch driver 710. The battery assembly 800 is disposed in the lock housing 100 and can supply power to the clutch driver 710 and the card reader.

[0052] The battery assembly 800 supplies power to the clutch driver 710 and the card reader. When the card reader detects the user's access card, it can control the clutch driver 710 to start, driving the clutch assembly 700 into the engaged state. At this time, the user can rotate the handle to unlock and open the door, which is suitable for use in hotels.

[0053] Specifically, the battery assembly 800 contains a battery that provides power.

[0054] In an embodiment, the latch assembly 200 includes a beveled tongue 210, which is slidably connected to the lock housing 100. The transmission assembly 300 includes a first transmission member 320, which is rotatably connected to the lock housing 100. The transmission frame 310 can drive the first transmission member 320 to rotate and push the beveled tongue 210 into the lock housing 100 through one end of the first transmission member 320. The latch drive assembly includes a first elastic member 410, which is disposed on the lock housing 100 and used to drive the beveled tongue 210 to extend out of the lock housing 100.

[0055] The above structure enables the extension and retraction of the oblique tongue 210. The structure is simple and easy to implement.

[0056] Specifically, the first transmission component 320 is similar to a lever structure. The transmission frame 310 is slidably connected to the lock housing 100 in the vertical direction, and the oblique tongue 210 is slidably connected to the lock housing 100 in the horizontal direction. When the transmission frame 310 slides upward, it pushes one end of the first transmission component 320, causing the first transmission component 320 to rotate. The other end of the first transmission component 320 swings, causing the oblique tongue 210 to retract into the lock housing 100. The first elastic component 410 is a spring, with one end abutting against the oblique tongue 210. When the transmission frame 310 slides downward to return to its original position, the spring pushes the oblique tongue 210 out.

[0057] It is understood that in some other embodiments, the transmission frame 310 may also be provided with a rack and pinion, and the first transmission member 320 may be provided with a corresponding gear, so as to drive the first transmission member 320 to rotate through the gear and rack structure; the first elastic member 410 may also be, for example, a spring or a torsion spring.

[0058] It is understood that in some other embodiments, when the transmission frame 310 slides, it can directly push the oblique tongue 210 into retraction. In this case, the sliding direction of the transmission frame 310 is parallel to the sliding direction of the oblique tongue 210.

[0059] In this embodiment, the latch assembly 200 includes a deadbolt 220, which is slidably connected to the lock housing 100 in the left-right direction. The transmission assembly 300 includes a second transmission member 330, which is rotatably connected to the lock housing 100. The second transmission member 330 is provided with a slider portion, and the deadbolt 220 is provided with a slide groove. The slide groove is inclined relative to the left-right direction, and the slider portion is slidably connected to the slide groove. When the second transmission member 330 rotates in the forward direction, it drives the deadbolt 220 to extend through the slider portion. When the second transmission member 330 rotates in the reverse direction, it drives the deadbolt 220 to retract through the slider portion. The transmission frame 310 can drive the second transmission member 330 to rotate in the reverse direction. The latch drive assembly also includes a second elastic member 420, which is provided on the lock housing 100 and can drive the second transmission member 330 to rotate in the forward direction.

[0060] The above structure enables the deadbolt 220 to extend and retract, and the structure is simple and easy to implement.

[0061] Specifically, the second transmission member 330 is similar to a lever structure. The transmission frame 310 is slidably connected to the lock housing 100 in the vertical direction, and the anti-locking tongue 220 is slidably connected to the lock housing 100 in the horizontal direction. When the transmission frame 310 slides upward, it pushes the second transmission member 330, causing the second transmission member 330 to rotate in the opposite direction. The second transmission member 330 pushes the anti-locking tongue 220 inward through the slider part. The second elastic member 420 is a torsion spring, one end of which is connected to the second transmission member 330. When the transmission frame 310 slides downward to reset, the torsion spring can drive the second transmission member 330 to rotate in the forward direction, pushing the anti-locking tongue 220 outward through the slider part.

[0062] It is understood that in other embodiments, the second elastic element 420 may also be a spring, with one end of the spring abutting against the locking tongue 220 to directly drive the locking tongue 220 to extend; or the second elastic element 420 may be a sheet.

[0063] It is understandable that the transmission frame 310 can also drive the second transmission component 330 to rotate through a gear and rack structure.

[0064] Specifically, the elastic reset element can be a spring, torsion spring, or sheet spring, etc., to drive the transmission frame 310 to reset. It can be understood that the elastic reset element can directly abut against the transmission frame 310, or it can indirectly drive the transmission frame 310 to reset through other structures. For example, the elastic reset element can be the same part as the second elastic element 420, and the transmission frame 310 can be driven to reset by the forward rotation of the second transmission element 330.

[0065] It is conceivable that in other embodiments, the locking tongue drive assembly may also be, for example, an electric push rod, which directly drives the anti-locking tongue 220 and the slant tongue 210 to extend; the transmission assembly 300 may also be other structures, which are not limited here.

[0066] Specifically, in use, the door lock of this embodiment typically has the unlocking dial 500 in the reset position. At this time, the two drive blocks 510 of the unlocking dial 500 maintain surface contact with the two mating blocks 311 of the transmission frame 310, ensuring accurate reset of the unlocking dial 500 and facilitating the switching of the clutch assembly 700 between the engaged and disengaged states. When the clutch assembly 700 switches to the engaged state, the user drives the unlocking dial 500 to rotate via the handle. The unlocking dial 500 pushes the mating blocks 311 of the transmission frame 310 through the drive blocks 510, causing the transmission frame 310 to slide upwards, retracting the latch 210 and the deadbolt 220. After releasing the handle, the elastic reset member drives the transmission frame 310 to slide downwards to reset, while simultaneously driving the latch 210 and the deadbolt 220 to extend via the latch drive assembly.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A door lock characterized by comprising: include: Lock case (100); A latch assembly (200) is retractably disposed in the lock housing (100); A transmission assembly (300) is disposed in the lock housing (100). The transmission assembly (300) includes a transmission frame (310). The transmission frame (310) is movably disposed in the lock housing (100) and can drive the latch assembly (200) to retract into the lock housing (100). The transmission frame (310) is provided with a mating block (311). A latch drive assembly is disposed on the lock housing (100) and is used to drive the latch assembly (200) to extend out of the lock housing (100); An unlocking dial (500) is rotatably mounted on a lock housing (100). The unlocking dial (500) is provided with a driving block (510), which abuts against the mating block (311). The unlocking dial (500) has a reset position and an unlocking position. In the reset position, the driving block (510) is in surface contact with the mating block (311). In the unlocking position, the unlocking dial (500) pushes the mating block (311) through the driving block (510) to drive the transmission frame (310) to move. An elastic reset element is disposed in the lock housing (100) and can drive the transmission frame (310) to reset and move.

2. The door latch of claim 1, wherein: The unlocking dial (500) is provided with two drive blocks (510), which are respectively placed on opposite sides of the rotation axis of the unlocking dial (500). The transmission frame (310) is provided with two mating blocks (311). When the unlocking dial (500) is in the reset position, the two drive blocks (510) and the two mating blocks (311) abut against each other in a one-to-one correspondence.

3. The door latch defined in claim 2, characterised in that: The drive block (510) is provided with an abutment surface (511) for contacting the mating block (311), and the abutment surfaces (511) of the two drive blocks (510) are parallel to each other.

4. The door latch of claim 1, wherein: It also includes a handle lever (600) and a clutch assembly (700). The handle lever (600) is rotatably mounted on the lock housing (100). The rotation axis of the handle lever (600) is collinear with the rotation axis of the unlocking lever (500). The handle lever (600) is provided with a handle mounting part. The clutch assembly (700) is disposed on the lock housing (100) and has an engaged state and a disengaged state. In the engaged state, the handle lever (600) and the unlocking lever (500) rotate synchronously. In the disengaged state, the handle lever (600) can rotate relative to the unlocking lever (500).

5. The door latch defined in claim 4, characterised in that: The clutch assembly (700) includes a clutch driver (710), a clutch reset member (720), and a clutch member (730). The clutch member (730) is radially movably disposed on the unlocking dial (500) along the rotation axis of the unlocking dial (500). The handle dial (600) is provided with a mating groove (610). The clutch driver (710) is used to drive the clutch member (730) to be inserted into the mating groove (610) to enter the engaged state. The clutch reset member (720) is used to drive the clutch member (730) to disengage from the mating groove (610) to enter the disengaged state.

6. The door latch defined in claim 5, characterised in that: The unlocking dial (500) is provided with a receiving hole (501) along the rotation axis, the handle dial (600) is embedded in the receiving hole (501), the handle dial (600) is provided with a clutch mounting hole (502) along the radial direction of the rotation axis, the clutch element (730) slides through the clutch mounting hole (502), and one end of the clutch mounting hole (502) extends through the hole wall of the receiving hole (501).

7. The door latch defined in claim 5, wherein: The unlocking dial (500) further includes a rotating shaft block (520), which is rotatably connected to the lock housing (100) around the rotation axis of the unlocking dial (500). The driving block (510) is connected to the outer periphery of the rotating shaft block (520). The clutch (730) is slidably connected to the driving block (510). One end of the clutch (730) opposite to the rotation axis of the unlocking dial (500) extends out of the driving block (510). The clutch actuator (710) is located outside the unlocking dial (500) and is opposite to the clutch (730).

8. The door latch defined in claim 5, wherein: It also includes a card reader and a battery assembly (800), the card reader being disposed in the lock housing (100) and electrically connected to the clutch driver (710), and the battery assembly (800) being disposed in the lock housing (100) and capable of powering the clutch driver (710) and the card reader.

9. The door latch defined in claim 1, wherein: The latch assembly (200) includes a slanted latch (210) slidably connected to the lock housing (100). The transmission assembly (300) includes a first transmission member (320) rotatably connected to the lock housing (100). The transmission frame (310) can drive the first transmission member (320) to rotate and push the slanted latch (210) into the lock housing (100) through one end of the first transmission member (320). The latch driving assembly includes a first elastic member (410) disposed on the lock housing (100) and used to drive the slanted latch (210) to extend out of the lock housing (100).

10. The door latch of claim 1, wherein: The latch assembly (200) includes a deadbolt (220), which is slidably connected to the lock housing (100) in the left-right direction. The transmission assembly (300) includes a second transmission member (330), which is rotatably connected to the lock housing (100). The second transmission member (330) is provided with a slider portion. The deadbolt (220) is provided with a groove, which is inclined relative to the left-right direction. The slider portion is slidably connected to the groove. When the transmission member (330) rotates in the forward direction, it drives the anti-locking tongue (220) to extend through the slider part, and when the second transmission member (330) rotates in the reverse direction, it drives the anti-locking tongue (220) to retract through the slider part. The transmission frame (310) can drive the second transmission member (330) to rotate in the reverse direction. The lock tongue driving assembly also includes a second elastic member (420). The second elastic member (420) is disposed on the lock housing (100) and can drive the second transmission member (330) to rotate in the forward direction.

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