Door lock

Abstract

The utility model relates to the field of locks and discloses a door lock. The door lock comprises a lock body provided with a password input module; the guide structure is arranged on the lock body; and the flexible film is arranged to be of an annular structure, the flexible film is arranged on the guide structure in an operable mode, and the operation path of the flexible film passes through the surface of the password input module so that the flexible film can cover at least part of the surface of the password input module. The flexible film is operably arranged on the guide structure, and after the password is input, the flexible film can be driven to operate, so that the mark on the surface of the flexible film is staggered from the number of the password input module, and the situation that the mark directly corresponds to the number and is easy to observe and speculate is reduced. The flexible film is arranged to be of the annular structure, the flexible film can rotate without limitation, and the multiple irregularly-distributed marks can be presented on the surface of the flexible film after the password is input for multiple times, so that the difficulty of speculating the password through the marks can be improved, and the probability that the password is cracked is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a door lock. Background Art

[0002] In today's society, door locks such as electronic locks and smart locks are widely used in various fields such as residences, office buildings, warehouses, etc. due to their convenience and high technology.

[0003] In the related art, door locks usually use a numeric keypad as an input device, and users need to press the corresponding numbers in the set password order to unlock the door. Although this design is simple and easy to use, each time a number is pressed, a fingerprint will be left on the surface of the numeric keypad. These marks may be used by criminals to observe and analyze the distribution, depth and other information of the marks to infer the password combination that the user may enter. Therefore, there is a security risk that the door lock is easily leaked by fingerprints. Utility Model Content

[0004] In view of this, the utility model provides a door lock to solve or improve the problem in the related art that the door lock is easily leaked by fingerprints.

[0005] The utility model provides a door lock, comprising:

[0006] A lock body, wherein the lock body is provided with a password input module;

[0007] A guide structure, wherein the guide structure is arranged on the lock body;

[0008] A flexible film is provided as an annular structure, the flexible film is operably provided on the guide structure, and the operation path of the flexible film passes through the surface of the password input module so that the flexible film covers at least a part of the surface of the password input module.

[0009] In an optional embodiment, it also includes a rotation drive device and a control component;

[0010] Wherein, the rotation driving device is arranged on the lock body, the rotation driving device is connected to the flexible membrane, and is used to drive the flexible membrane to operate;

[0011] The control component includes a first comparison circuit and a first output circuit. The first comparison circuit is electrically connected to the password input module. The first comparison circuit is used to receive password information transmitted by the password input module and output a first signal when the password information is the same as preset password information. The first comparison circuit and the rotation drive device are both electrically connected to the first output circuit. The first output circuit outputs a control signal to the rotation drive device in response to the first signal.

[0012] In an optional embodiment, the door lock further comprises an angle detection device, and the angle detection device is used to detect the rotation angle of the rotation drive device;

[0013] The control component also includes a second comparison circuit, a calculation circuit and a second output circuit. The angle detection device and the second comparison circuit are both electrically connected to the calculation circuit. The calculation circuit is used to calculate the total operating distance of the flexible membrane according to the rotation angle. The second comparison circuit is used to receive the total operating distance and output a second signal when the total operating distance is greater than or equal to a preset life distance. The second output circuit is electrically connected to the second comparison circuit. The second output circuit outputs an alarm signal in response to the second signal.

[0014] In an optional embodiment, a hydrophobic layer is provided on a surface of the flexible membrane facing away from the password input module.

[0015] In an optional embodiment, a driving roller is further included, which is rotatably disposed on the lock body, is disposed on the running path of the flexible film and abuts against the surface of the flexible film, and is used to drive the flexible film to run.

[0016] In an optional embodiment, a motor is further included, wherein the motor is mounted on the lock body, the output shaft of the motor is connected to the driving roller, and the motor is used to drive the driving roller to rotate.

[0017] In an optional embodiment, an entrance and exit is provided on the lock body, and the entrance and exit are connected to the interior of the lock body. The entrance and exit are provided on both sides of the password input module. The operation path of the flexible membrane passes through the entrance and exit on both sides of the password input module, and a part of the flexible membrane is provided inside the lock body, and the other part is provided outside the lock body. The part of the flexible membrane located outside the lock body covers at least a part of the surface of the password input module.

[0018] In an optional embodiment, a cleaning member is further included, which is connected to the lock body and arranged on the running path of the flexible film. The cleaning member abuts against the surface of the flexible film away from the password input module and is used to clean the flexible film.

[0019] In an optional embodiment, the cleaning element is disposed inside the lock body.

[0020] In an optional implementation, the cleaning piece is provided on both sides of the password input module.

[0021] In an optional embodiment, the guide structure includes a guide roller, which is rotatably disposed on the lock body, the guide roller is disposed on a running path of the flexible film, and the guide roller abuts against a surface of the flexible film.

[0022] The door lock provided by the utility model covers at least part of the surface of the password input module with a flexible film. During the process of inputting the password, the user can press the password input module through the flexible film, so that fingerprints and other marks are left on the surface of the flexible film. By operably setting the flexible film on the guide structure, after the password is input, the flexible film can be driven to operate so that the marks on the surface of the flexible film are staggered with the numbers of the password input module, thereby reducing the situation where the marks directly correspond to the numbers and are easily observed and speculated. By setting the flexible film as a ring structure, the flexible film can rotate without restriction. After the password is input multiple times, the surface of the flexible film can present multiple irregularly distributed marks, thereby increasing the difficulty of guessing the password through the marks and reducing the probability of the password being cracked. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the external structure of a door lock according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the relative position relationship between the flexible film and the cleaning element in an embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of a door lock according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the connection structure between the password output module and the rotation drive device of the embodiment of the utility model and the control component;

[0028] Figure 5 This is a schematic diagram of the connection structure between the angle detection device and the control component of an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. Lock body; 101. Entrance and exit; 2. Guide roller; 3. Flexible membrane; 4. Password input module; 5. Motor; 6. Cleaning part; 7. Driving roller. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] In the related art, door locks usually use numeric keypads as input devices, and users need to press the corresponding numbers in sequence according to the set password order to unlock the door. Although this design is simple and easy to use, each time a number is pressed, a fingerprint mark will be left on the surface of the numeric keypad. These marks may be used by criminals to observe and analyze the distribution, depth and other information of the marks to infer the password combination that the user may enter. Therefore, there is a security risk that the door lock is easily leaked by fingerprints. In order to solve or improve the technical problem in the related art that the door lock is easily leaked by fingerprints, a door lock is provided in an embodiment of the utility model.

[0033] Combine the following Figures 1 to 5 , describing the door lock provided in an embodiment of the present utility model.

[0034] Specifically, the door lock includes a lock body 1 , a guide structure and a flexible membrane 3 .

[0035] The lock body 1 is provided with a password input module 4. Optionally, the password input module 4 is configured as a numeric keyboard, for example, the numeric keyboard may be a physical numeric keyboard or a virtual numeric keyboard, such as a capacitive touch panel.

[0036] The guide structure is disposed on the lock body 1 , and is used to support the flexible membrane 3 and guide the flexible membrane 3 .

[0037] The flexible film 3 is configured as an annular structure. For example, the two ends of the strip film can be connected to form an annular flexible film 3. The flexible film 3 is flexible so that the flexible film 3 can be bent and deformed. The flexible film 3 can be operatively arranged on the guide structure, and the operating path of the flexible film 3 passes through the surface of the password input module 4 so that the flexible film 3 covers at least part of the surface of the password input module 4. Optionally, the flexible film 3 is configured as a transparent film, a semi-transparent film or a frosted film, so that the user can observe the password input module 4 through the flexible film 3. Furthermore, the digital area of ​​the password input module 4 can be configured to emit light, so that the user can observe the digital of the password input module 4.

[0038] In this embodiment, by making the flexible film 3 cover at least part of the surface of the password input module 4, during the process of inputting the password, the user can press the password input module 4 through the flexible film 3, so that fingerprints and other marks are left on the surface of the flexible film 3. By arranging the flexible film 3 operably on the guide structure, after the password is input, the flexible film 3 can be driven to operate so that the marks on the surface of the flexible film 3 are staggered with the numbers of the password input module 4, thereby reducing the situation where the marks directly correspond to the numbers and are easily observed and speculated. By setting the flexible film 3 as a ring structure, the flexible film 3 can rotate without restriction. After the password is input multiple times, the surface of the flexible film 3 can present multiple irregularly distributed marks, thereby increasing the difficulty of guessing the password through the marks and reducing the probability of the password being cracked.

[0039] In addition, by setting the flexible membrane 3 as a ring structure, the flexible membrane 3 can rotate continuously in one direction and reciprocate, so as to better meet the operating habits of different users. At the same time, the flexible membrane 3 can be recycled, thereby reducing the use cost of the door lock.

[0040] In addition, the flexible film 3 covers the surface of the password input module 4, which can protect the password input module 4, reduce the impact or damage of external objects on the password input module 4, and reduce the entry of dust and impurities into the password input module 4, thereby extending the service life of the password input module 4.

[0041] Furthermore, after inputting the password, the user can manually move the flexible membrane 3 to make it operate, which can reduce the number of parts of the door lock, reduce the cost of the door lock, and simplify the structure of the door lock.

[0042] In some embodiments provided by the present invention, the door lock further includes a rotation drive device and a control component.

[0043] The rotation driving device is arranged on the lock body 1 , is connected to the flexible membrane 3 , and is used to drive the flexible membrane 3 to operate.

[0044] refer to Figure 4 As shown, the control component includes a first comparison circuit and a first output circuit. The first comparison circuit is electrically connected to the password input module, and the first comparison circuit is used to receive the password information transmitted by the password input module 4, and output a first signal when the password information is the same as the preset password information. That is, the first comparison circuit can compare the password information with the preset password information, and output the first signal when the two are the same.

[0045] The first comparison circuit and the rotation drive device are both electrically connected to the first output circuit. The first output circuit outputs a first control signal to the rotation drive device in response to the first signal. The rotation drive device rotates in response to the first control signal. It can be understood that the password transmitted by the password input module 4 is the password entered by the user through the password input module 4. The first comparison circuit compares whether the two pieces of information are the same, which is an inherent performance of the first comparison circuit of the control component. The comparison process is the same as the judgment process of the control component of the smart lock or electronic lock in the prior art, so it will not be repeated here. The first output circuit is used to amplify or convert the signal output by the first comparison circuit to facilitate the control of the rotation of the rotation drive device.

[0046] In this embodiment, when the control component determines that the password information input by the password input module 4 is correct, it can control the door lock to unlock, and control the rotation drive device to drive the flexible membrane 3 to operate, so that after the user enters the correct password, the flexible membrane 3 can be automatically operated. This can improve the intelligence level of the door lock, reduce the user's operating steps to open the door, and make the door lock more convenient to use.

[0047] Optionally, the rotation driving device includes a motor 5 and a driving roller 7. For example, the motor 5 is arranged on the lock body 1, and the output shaft of the motor 5 is connected to the driving roller 7, and the driving roller 7 abuts against the surface of the flexible film 3. The motor 5 is electrically connected to the control component. For example, the driving roller 7 can be directly mounted on the output shaft of the motor 5, or can be connected to the output shaft of the motor 5 by belt drive, chain drive, gear drive or coupling drive, so as to flexibly arrange the position of the motor 5 or the driving roller 7.

[0048] In some embodiments provided by the present utility model, the door lock further comprises an angle detection device. The angle detection device is used to detect the rotation angle of the rotation drive device.

[0049] refer to Figure 5 As shown, the control component also includes a second comparison circuit, a calculation circuit and a second output circuit. The angle detection device and the second comparison circuit are both electrically connected to the calculation circuit. The calculation circuit is used to calculate the total operating distance of the flexible membrane according to the rotation angle. The second comparison circuit is used to receive the total operating distance, and output a second signal when the total operating distance is greater than or equal to the preset life distance. The second output circuit is electrically connected to the second comparison circuit, and the second output circuit outputs an alarm signal in response to the second signal. Among them, the preset operating life distance of the flexible membrane 3 is the maximum distance that the flexible membrane 3 can operate normally, and this value can be obtained based on multiple experiments.

[0050] It can be understood that the rotation angle of the rotation drive device has a corresponding relationship with the operating distance of the flexible membrane 3. In this embodiment, the total rotation angle of the rotation drive device can be obtained by accumulating the rotation angle of the rotation drive device each time, so as to obtain the total operating distance of the flexible membrane 3 according to the total rotation angle. According to the input rotation angle, the calculation circuit can perform corresponding arithmetic operations to obtain the total operating distance, which belongs to the inherent performance of the calculation circuit and will not be described in detail. The second comparison circuit can compare the total operating distance and the preset life distance, and output a second signal when the two are the same. When the total operating distance of the flexible membrane 3 is greater than or equal to the preset operating life distance, it means that the service life of the flexible membrane 3 is about to reach the limit, and the second output circuit outputs an alarm signal to prompt the user to replace the flexible membrane 3 in time.

[0051] Optionally, the door lock may include a communication module. The communication module is electrically connected to the second output circuit, and the communication module is used to communicate with the mobile intelligent terminal. The second output circuit sends an alarm signal to the mobile intelligent terminal through the communication module to draw the user's attention. For example, the communication module may be a wireless module or a Bluetooth module. The mobile intelligent terminal may be a mobile phone, a tablet or a laptop.

[0052] Of course, the door lock may also include an alarm component such as a speaker or a display component, and the speaker or display component is electrically connected to the second output circuit, and the second output circuit sends an alarm signal to the speaker or display component to draw the user's attention through the speaker or display component.

[0053] Optionally, the angle detection device can be configured as an encoder, for example, a photoelectric encoder or a Hall encoder. Further, the encoder can be directly connected to the output shaft of the motor 5, and can be connected to the output shaft of the motor 5 through a gear mechanism or a belt transmission mechanism.

[0054] Of course, the flexible membrane 3 is not limited to being driven by a rotating driving device. For example, in other embodiments provided by the present utility model, the door lock further includes a driving roller 7. The driving roller 7 is rotatably arranged on the lock body 1. The driving roller 7 is arranged on the running path of the flexible membrane 3 and abuts against the surface of the flexible membrane 3. The driving roller 7 is used to drive the flexible membrane 3 to run. In this embodiment, the user can rotate the driving roller 7 to drive the flexible membrane 3 to run, reducing the manual movement of the flexible membrane 3, which is inconvenient to apply force and prone to slippage.

[0055] It can be understood that the driving roller 7 can be used alone or in conjunction with a rotation driving device.

[0056] Optionally, at least a portion of the driving roller 7 is disposed outside the lock body 1 , so that the user can operate and twist the driving roller 7 .

[0057] Optionally, the portion of the driving roller 7 for the user to operate and hold may be provided with anti-skid grooves to increase the friction between the driving roller 7 and the user's fingers and reduce the slippage between the user's fingers and the driving roller 7 .

[0058] Of course, the driving roller 7 is not limited to being manually twisted by the user. For example, in other embodiments provided by the present utility model, the door lock further includes a motor 5. The motor 5 is mounted on the lock body 1, for example, the motor 5 is arranged inside the lock body 1. The output shaft of the motor 5 is connected to the driving roller 7, and the motor 5 is used to drive the driving roller 7 to rotate. In this embodiment, the driving roller 7 is driven to rotate by the motor 5, so that the driving roller 7 can drive the flexible membrane 3 to operate, and there is no need to manually twist the driving roller 7, thereby making the door lock more convenient to use. Furthermore, the motor 5 can be controlled by a control component. The specific control method can refer to the relevant discussion on the control component controlling the rotation drive device above, which will not be repeated here.

[0059] In some embodiments provided by the utility model, the door lock further includes a battery, which is electrically connected to the motor 5 and is used to power the motor 5. In this way, the door lock has a battery to power the motor 5, and can be used without an external power supply, thereby making the door lock more convenient to use and more flexible in usage scenarios. Furthermore, the battery is electrically connected to the control component to power the control component.

[0060] Optionally, the battery is a storage battery, so that the battery can be reused to reduce the use cost of the door lock. Alternatively, the battery is a dry cell, which can be quickly replaced without relying on external power supply for charging after the battery is exhausted.

[0061] refer to Figure 3 As shown, in some embodiments provided by the present invention, the lock body 1 is provided with an entrance 101 communicating with the interior of the lock body 1. The entrances 101 are provided on both sides of the password input module 4, and the running path of the flexible membrane 3 passes through the entrances 101 on both sides of the password input module 4, and a part of the flexible membrane 3 is provided inside the lock body 1, and the other part is provided outside the lock body 1. The part of the flexible membrane 3 located outside the lock body 1 covers at least part of the surface of the password input module 4.

[0062] In this embodiment, during the operation of the flexible membrane 3, the portion of the flexible membrane 3 located inside the lock body 1 passes through the entrance 101 on one side of the password input module 4, passes through the surface of the password input module 4, and enters the lock body 1 through the entrance 101 on the other side of the password input module 4. With this arrangement, the installation space inside the lock body 1 can be fully utilized to accommodate the flexible membrane 3, making the overall structure of the door lock more concise and compact.

[0063] refer to Figure 2 and Figure 3As shown, in some embodiments provided by the present utility model, the door lock further includes a cleaning member 6. The cleaning member 6 is connected to the lock body 1, and the cleaning member 6 is arranged on the running path of the flexible film 3. The cleaning member 6 abuts against the surface of the flexible film 3 away from the password input module 4, and is used to clean the flexible film 3. For example, the inner surface of the flexible film 3 faces the password input module 4, and the outer surface faces away from the password input module 4. Correspondingly, the cleaning member 6 abuts against the outer surface of the flexible film 3.

[0064] In this embodiment, by abutting the cleaning member 6 against the surface of the flexible membrane 3 facing away from the password input module 4, during the operation of the flexible membrane 3, the cleaning member 6 can clean the mark on the surface of the flexible membrane 3, so that the mark on the surface of the flexible membrane 3 is eliminated or blurred, thereby further increasing the difficulty of inferring the password through the mark and reducing the probability of the password being cracked.

[0065] Optionally, the cleaning member 6 is configured as a brush, a flannel cloth or a felt pad.

[0066] refer to Figure 3 As shown, in some embodiments provided by the present invention, the cleaning member 6 is disposed inside the lock body 1. In this embodiment, by disposing the cleaning member 6 inside the lock body 1, on the one hand, the internal space of the lock body 1 can be fully utilized to install and arrange the cleaning member 6, thereby improving the simplicity and compactness of the overall structure of the lock body 1. On the other hand, it reduces the dust from the outside falling on the cleaning member 6 to affect the cleaning ability of the cleaning member 6.

[0067] refer to Figure 3 As shown, further, the cleaning member 6 is blocked at the entrance and exit 101 to reduce the situation where external dust and impurities enter the interior of the lock body 1 through the entrance and exit 101.

[0068] In some embodiments provided by the utility model, cleaning members 6 are provided on both sides of the password input module 4. In this embodiment, by providing cleaning members 6 on both sides of the password input module 4, on the one hand, the cleaning effect of the flexible film 3 can be improved, and on the other hand, when the flexible film 3 rotates forward or reversely, the corresponding cleaning members 6 clean the flexible film 3.

[0069] In some embodiments provided by the utility model, a hydrophobic layer is provided on the surface of the flexible membrane 3 away from the password input module 4. By providing a hydrophobic layer on the surface of the flexible membrane 3, the flexible membrane 3 has anti-condensation, self-cleaning and antibacterial functions. Specifically, by providing a hydrophobic layer, the surface of the flexible membrane 3 has a water-repelling effect, so the flexible membrane 3 has a waterproof and anti-condensation function, and water stains are not easy to stay on the flexible membrane 3, ensuring that the stability of the internal electronic components will not be affected by water and condensation problems. The surface of the flexible membrane 3 is also not easy to be stained with dust, and even if it is stained with dust, it can be easily removed by the cleaning member 6. At the same time, the flexible membrane 3 has an antibacterial effect, and the antibacterial function can effectively reduce the risk of users being infected with bacteria after contacting the numeric keypad.

[0070] Optionally, a super-hydrophobic nanomaterial may be coated on the surface of the flexible film 3 to form the hydrophobic layer.

[0071] In some embodiments provided by the present invention, the guide structure includes a guide roller 2. The guide roller 2 is rotatably disposed on the lock body 1, the guide roller 2 is disposed on the running path of the flexible film 3, and the guide roller 2 abuts against the surface of the flexible film 3.

[0072] In this embodiment, by providing a rotatable guide roller 2 to support and guide the flexible membrane 3, the resistance of the guide structure to the flexible membrane 3 can be reduced, making the operation of the flexible membrane 3 smoother and reducing the wear of the guide structure on the flexible membrane 3, thereby extending the service life of the flexible membrane 3.

[0073] Optionally, the number of the guide roller 2 may be set to one, and both the guide roller 2 and the driving roller 7 abut against the inner surface of the flexible film 3 .

[0074] Of course, the number of the guide rollers 2 can also be set to two. For example, the two guide rollers 2 are both arranged inside the lock body 1, and the two guide rollers 2 are respectively arranged on both sides of the password input module 4.

[0075] Of course, the number of guide rollers 2 can also be set to more than two. In the case of two or more guide rollers 2, the sum of the number of guide rollers 2 abutting against the inner surface of the flexible film 3 and the number of drive rollers 7 abutting against the inner surface of the flexible film 3 should be greater than two.

[0076] The guide structure is not limited to being set as the guide roller 2. For example, in other embodiments provided by the present utility model, the guide structure can be set as a guide channel such as a guide groove or a guide hole.

[0077] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A door lock, characterized in that: include: A lock body (1), wherein the lock body (1) is provided with a password input module (4); A guide structure, wherein the guide structure is arranged on the lock body (1); A flexible membrane (3), the flexible membrane (3) being arranged in an annular structure, the flexible membrane (3) being operably arranged on the guide structure, the operating path of the flexible membrane (3) passing through the surface of the password input module (4), so that the flexible membrane (3) covers at least part of the surface of the password input module (4).

2. The door lock according to claim 1, characterized in that: Also included is a rotation drive device and a control assembly; Wherein, the rotation driving device is arranged on the lock body (1), the rotation driving device is connected to the flexible membrane (3), and is used to drive the flexible membrane (3) to operate; The control component comprises a first comparison circuit and a first output circuit, wherein the first comparison circuit is electrically connected to the password input module (4), the first comparison circuit is used to receive password information transmitted by the password input module (4), and output a first signal when the password information is the same as preset password information, the first comparison circuit and the rotation drive device are both electrically connected to the first output circuit, and the first output circuit outputs a control signal to the rotation drive device in response to the first signal.

3. The door lock according to claim 2, characterized in that: The door lock further comprises an angle detection device, wherein the angle detection device is used to detect the rotation angle of the rotation drive device; The control component also includes a second comparison circuit, a calculation circuit and a second output circuit. The angle detection device and the second comparison circuit are both electrically connected to the calculation circuit. The calculation circuit is used to calculate the total operating distance of the flexible membrane (3) according to the rotation angle. The second comparison circuit is used to receive the total operating distance and output a second signal when the total operating distance is greater than or equal to a preset life distance. The second output circuit is electrically connected to the second comparison circuit. The second output circuit outputs an alarm signal in response to the second signal.

4. The door lock according to claim 1, characterized in that: A hydrophobic layer is provided on the surface of the flexible film (3) facing away from the password input module (4).

5. The door lock according to claim 1, characterized in that: It also comprises a driving roller (7), which is rotatably arranged on the lock body (1), and the driving roller (7) is arranged on the running path of the flexible film (3) and abuts against the surface of the flexible film (3), and the driving roller (7) is used to drive the flexible film (3) to run.

6. The door lock according to claim 5, characterized in that: It also comprises a motor (5), wherein the motor (5) is mounted on the lock body (1), the output shaft of the motor (5) is connected to the driving roller (7), and the motor (5) is used to drive the driving roller (7) to rotate.

7. The door lock according to any one of claims 1 to 6, characterized in that: The lock body (1) is provided with an entrance (101) communicating with the interior of the lock body (1), the entrances (101) are provided on both sides of the password input module (4), the running path of the flexible membrane (3) passes through the entrances (101) on both sides of the password input module (4), and a part of the flexible membrane (3) is arranged inside the lock body (1), and another part is arranged outside the lock body (1), and the part of the flexible membrane (3) located outside the lock body (1) covers at least a part of the surface of the password input module (4).

8. The door lock according to any one of claims 1 to 6, characterized in that: The invention also comprises a cleaning member (6), the cleaning member (6) being connected to the lock body (1) and arranged on the running path of the flexible film (3), the cleaning member (6) being in contact with the surface of the flexible film (3) facing away from the password input module (4), and being used for cleaning the flexible film (3).

9. The door lock according to claim 8, characterized in that: The cleaning members (6) are provided on both sides of the password input module (4).

10. The door lock according to any one of claims 1 to 6, characterized in that: The guide structure comprises a guide roller (2), the guide roller (2) is rotatably arranged on the lock body (1), the guide roller (2) is arranged on the running path of the flexible film (3), and the guide roller (2) abuts against the surface of the flexible film (3).

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