Intelligent connecting arm door lock easy to install and capable of being unlocked through authentication
The three-dimensional linked-arm intelligent door lock design adopts a rotating arm and a displaceable lock body, which solves the problem of the single structure of traditional locks, realizes multi-dimensional locking and unlocking, enhances security and flexibility, and is suitable for cabinets and lockers in the power system and communication fields.
Patent Information
- Application Number
- CN202510973709.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-15
- Publication Date
- 2025-09-19
AI Technical Summary
In traditional lock designs, the lock tongue is locked or unlocked by only extending and retracting in a single dimension, resulting in a relatively simple structure and function, and unable to provide more security options and flexibility.
It adopts a three-dimensional linked arm intelligent door lock, which realizes three-dimensional multi-dimensional locking and unlocking through rotating arms and displaceable lock bodies. It combines card reading, Bluetooth link and intelligent passive electronic key, is equipped with a main control body, rocker arm and electronic lock cylinder, and supports permission authentication and remote management.
It realizes multi-dimensional locking and unlocking functions, enhances security and flexibility, supports authority authentication and remote management, and is suitable for five-protection cabinets in power systems, various cabinets and storage cabinets in the communication field.
Smart Images
Figure CN120666966A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of door locks, and in particular to an easy-to-install intelligent door lock with a linked arm that can be opened through authentication. Background Art
[0002] In traditional lock designs, the lock tongue usually achieves locking or unlocking functions through expansion and contraction in a single dimension. Specifically, the lock tongue interacts with the mating parts in the lock body by extending outward or retracting inward, thereby completing the unlocking or locking operation. This design is simple and effective and can achieve basic locking functions in most cases. However, this single-dimensional design also has certain limitations. Since the lock tongue only expands and contracts in one direction, its structure and function are relatively simple, and it cannot provide more security options and flexibility. Summary of the Invention
[0003] The purpose of the present invention is to solve the shortcomings existing in the prior art. In traditional lock designs, the lock tongue usually achieves locking or unlocking functions through expansion and contraction in a single dimension. Specifically, the lock tongue interacts with the matching parts in the lock body by extending outward or retracting inward, thereby completing the unlocking or locking operation. Such a design is simple and effective and can achieve basic locking functions in most cases. However, this single-dimensional design also has certain limitations. Since the lock tongue only expands and contracts in one direction, its structure and function are relatively simple, and it cannot provide more security options and flexibility.
[0004] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an easy-to-install authentication-opened linked arm smart door lock, comprising a door panel and a frame, wherein the door panel and the frame are rotatably connected, a main control body is installed on one side of the door panel, and a buckle body is installed on one side of the frame, the main control body comprises a main control mechanism, one side of the main control mechanism is rotatably connected to a rocker arm, one side of the rocker arm is provided with a door open status light, one side of the rocker arm is provided with a door closed status light, one side of the main control mechanism is provided with a lock core, the lock core is installed inside the rocker arm, the inner wall of the rocker arm is engaged with the buckle body, and an intelligent system is provided inside the main control mechanism.
[0005] As a preferred embodiment, the intelligent system includes an authentication unit for authority authentication, the authentication unit is electrically connected to an unlocking unit for unlocking the main control body, and the unlocking unit is electrically connected to a recording unit for recording unlocking data.
[0006] As a preferred embodiment, the authentication unit includes an authentication module for authority authentication, the authentication module is electrically connected to a locking module for locking an application and a recording module for recording authentication data, the recording module is electrically connected to a data module for data storage, and the data module is electrically connected to an intervention module for intervening in data module processing.
[0007] As a preferred embodiment, the authentication module turns on the authentication mode, and the authentication module analyzes whether the unlocking information of the required authorization application has authorization information. If the authentication module analyzes that the authorization application already has authorization information, the locking module locks the authorization application. If the authentication module analyzes that the authorization application does not have authorization information, the recording module turns on information recording, records various types of information of the applicant, and stores it in the data module for preservation, indicating it as authorized data. At the same time, the recording module can be renamed during the recording process. If the recorded data needs to be deleted and changed, the intervention module intervenes in the data module to modify the name and delete the authorization permission.
[0008] As a preferred embodiment, the unlocking unit includes an analysis module for analyzing the data information of the unlocking application, the analysis module is electrically connected to a termination module for terminating the unlocking application and an unlocking module for unlocking the door lock, and the unlocking module is electrically connected to a recording unit for recording the unlocking information.
[0009] As a preferred embodiment, the unlocker applies for unlocking information through the unlocking unit, and then the analysis module obtains the authorized data in the data module for analysis and matching. If the analysis module analyzes that the applicant's application unlocking information matches the authorized data, the rocker arm will be controlled to open, and then the recording unit will record the unlocking data of the unlocker. If the analysis module analyzes that the applicant's application unlocking information does not match the authorized data, the termination module will terminate the unlocking application of the unlocker.
[0010] As a preferred embodiment, the recording unit includes a transmission module for transmitting unlocking data, the transmission module is electrically connected to a recording module for recording unlocking data, the recording module is electrically connected to an arrangement module for arranging the recorded unlocking data, the arrangement module is electrically connected to a storage module for storing the arrangement data, the storage module is electrically connected to a processing module for processing stored data, the processing module is electrically connected to an ignore module for ignoring processing and a delete module for deleting stored data, and the storage module is electrically connected to a query module for querying stored data.
[0011] As a preferred embodiment, the transmission module transmits the unlocking data, and the recording module records it. The arrangement module sorts the unlocking data recorded by the recording module and arranges it in chronological order. The storage module stores the arranged unlocking data. The query module can view the unlocking data in the storage module. The processing module is used to process the stored data in the storage module and process and analyze the unlocking information with an arrangement sequence exceeding 100. If the arrangement sequence number in the stored data does not exceed 100, it will be ignored by the ignoring module. If the arrangement sequence number in the stored data exceeds 100, the stored data will be deleted by the deleting module.
[0012] Compared with the prior art, the advantages and positive effects of the present invention are:
[0013] 1. In the present invention, the three-dimensional connected arm intelligent cabinet door lock has an arm that can rotate, and the lock body and the buckle body can be displaced to achieve three-dimensional multi-dimensional locking and unlocking. The lock body is equipped with a card reader, Bluetooth link and an intelligent passive electronic key to achieve intelligent management of the connected arm lock. It is suitable for five-protection cabinets in the power system, various cabinets in the communication field, lockers, etc. The device consists of a main control body and a buckle body, wherein the main control body consists of a control mechanism, a rocker arm that rotates in a free dimension and an electronic lock core. It can meet the multi-dimensional locking requirements of the cabinet door. The rocker arm rotates and buckles the buckle body to close it. There is a door opening on the rocker arm. The status light indicator indicates the door is open, and the door closed status light indicator indicates the door is closed. At the same time, the main control body has a BLE Bluetooth link to the indicator light, and is also connected to the Bluetooth of the mobile phone App. The door opening permission can be managed from the mobile phone App management interface. The main control body has a Keypad, and the door is opened by entering the door opening password. The electronic smart lock core can be unlocked with the accessories shown in the figure. The control mechanism of the main control body is an electronic control component. The control mechanism has an RS communication connection function, which supports the customer management platform to build a cabinet door management and monitoring system. The customer system platform can remotely control the door.
[0014] 2. In the present invention, the locking and confirmation of authorization requests are achieved through the cooperation of the authentication module and the locking module. The authentication module verifies the application information. If authorization is not obtained, the recording module is activated to collect information to ensure data accuracy and completeness. Through cooperation with the recording unit and analysis module, the unlocking device is successfully controlled and the unlocking information is recorded. If a match fails, the ineligible unlocking request is automatically terminated. The authentication module cooperates with the locking module and the recording module to ensure that data recording can be correctly initiated even when authorization information is not available, providing basic data for subsequent authorization recording and processing. The recording module cooperates with the intervention module and the data module to provide flexibility in operations such as data modification, deletion, and renaming, ensuring the accuracy and legitimacy of the recorded data. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1The present invention provides a schematic structural diagram of the main control body of an easy-to-install authentication-enabled linked-arm smart door lock;
[0016] Figure 2 The present invention provides a schematic diagram of the buckle structure of an easy-to-install authentication-opened linked arm smart door lock;
[0017] Figure 3 The present invention provides a schematic diagram of the structure of the main control body and the buckle body in the coordinated state of an easy-to-install authentication-opened linked arm smart door lock;
[0018] Figure 4 The present invention provides a schematic structural diagram of the door panel and frame of an easy-to-install authentication-opened linked arm smart door lock;
[0019] Figure 5 The present invention provides a schematic side view of the structure between the door panel and the frame of an easy-to-install authentication-opened linked arm smart door lock;
[0020] Figure 6 The present invention provides a schematic structural diagram of the main control mechanism of an easy-to-install authentication-open linked arm smart door lock;
[0021] Figure 7 The present invention provides a schematic diagram of the rocker arm structure of an easy-to-install authentication-opened connected arm smart door lock;
[0022] Figure 8 The present invention provides a schematic diagram of the lock core structure of an easy-to-install authentication-opened linked-arm smart door lock;
[0023] Figure 9 The present invention provides a schematic diagram of the accessory structure of an easy-to-install authentication-opened connected arm smart door lock;
[0024] Figure 10 The present invention proposes a system diagram of an easy-to-install authentication-opened linked arm smart door lock;
[0025] Figure 11 The present invention proposes an authentication unit system diagram of an easy-to-install authentication-opened linked-arm smart door lock;
[0026] Figure 12 The present invention proposes an unlocking unit system diagram of an easy-to-install authentication-opened linked-arm smart door lock;
[0027] Figure 13 The present invention provides a recording unit system diagram of an easy-to-install authentication-opened linked-arm smart door lock.
[0028] Legend:
[0029] 1. Door panel; 2. Frame; 3. Main control unit; 4. Buckle body;
[0030] 31. Main control mechanism; 32. Rocker arm; 33. Door open status light; 34. Door closed status light; 35. Lock cylinder. DETAILED DESCRIPTION
[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0032] Example 1
[0033] like Figure 1-8 As shown, the present invention provides a technical solution: an easy-to-install authentication-opened linked arm intelligent door lock, comprising a door panel 1 and a frame 2, the door panel 1 and the frame 2 being rotatably connected, a main control body 3 being installed on one side of the door panel 1, a buckle body 4 being installed on one side of the frame 2, the main control body 3 comprising a main control mechanism 31, a rocker arm 32 being rotatably connected on one side of the main control mechanism 31, a door open status light 33 being provided on one side of the rocker arm 32, a door closed status light 34 being provided on one side of the rocker arm 32, a lock core 35 being provided on one side of the main control mechanism 31, the lock core 35 being installed inside the rocker arm 32, the inner wall of the rocker arm 32 being snap-connected to the buckle body 4, and an intelligent system being provided inside the main control mechanism 31.
[0034] In this embodiment, the three-dimensional linked arm intelligent cabinet door lock has an arm that can rotate, and the lock body and the buckle body 4 can be displaced to achieve three-dimensional multi-dimensional locking and unlocking. The lock body is equipped with a card reader, Bluetooth link and an intelligent passive electronic key to realize intelligent management of the linked arm lock. It is suitable for five-protection cabinets in the power system, various cabinets in the communication field, lockers, etc. The device consists of a main control body 3 and a buckle body 4, wherein the main control body 3 consists of a control mechanism, a rocker arm 32 that rotates in a free dimension and an electronic lock core 35, which can meet the multi-dimensional locking requirements of the cabinet door. The rocker arm 32 rotates to engage the buckle body 4 to achieve closing. There is a door open status light 33 on the rocker arm 32 to indicate the door open status, and a door closed status light indicator to indicate the door closed status. At the same time, the main control body 3 has a BLE Bluetooth link to the indicator light, and is connected to the Bluetooth of the mobile phone App at the same time. The door opening permission can be managed from the mobile phone App management interface. The main control body 3 has a Keypad, and the door is opened by entering the door opening password. The electronic smart lock core 35 can be Figure 9 The accessories shown cooperate with the lock control to open. The control mechanism of the main control body 3 is an electronic control component. The control mechanism has an RS485 communication connection function, which supports the customer management platform to build a cabinet door management and monitoring system. The customer system platform can remotely control the door.
[0035] Example 2
[0036] like Figure 9-12 As shown, the intelligent system includes an authentication unit for authority authentication, the authentication unit is electrically connected to an unlocking unit for unlocking the main control body 3, the unlocking unit is electrically connected to a recording unit for recording unlocking data, the authentication unit includes an authentication module for authority authentication, the authentication module is electrically connected to a locking module for locking an application and a recording module for recording authentication data, the recording module is electrically connected to a data module for data storage, and the data module is electrically connected to an intervention module for intervening in data module processing. The authentication module starts the authentication mode, and the authentication module analyzes whether the unlocking information of the required authorization application has authorization information. If the authentication module analyzes that the authorization application already has authorization information, the locking module locks the authorization application. If the authentication module analyzes that the authorization application does not have authorization information, the recording module will start information recording, record various information of the applicant, and store it in the data module for preservation, indicating that it is authorized data. At the same time, the recording module can be renamed during the recording process. If the recorded data needs to be deleted or changed, the intervention module will intervene in the data module to modify the name and delete the authorization permission. The unlocking unit includes an analysis module for analyzing the data information of the unlocking application. The analysis module is electrically connected to a termination module for terminating the unlocking application and an unlocking module for unlocking the door lock. The unlocking module is electrically connected to a recording unit for recording unlocking information. The unlocker applies for unlocking information through the unlocking unit, and then the analysis module obtains the unlocking information in the data module. The authorized data is analyzed and matched. If the analysis module analyzes that the application unlocking information of the matching applicant matches the authorized data, the rocker arm 32 will be controlled to open, and then the recording unit will record the unlocking data of the unlocker. If the analysis module analyzes that the application unlocking information of the matching applicant does not match the authorized data, the termination module will terminate the unlocking application of the unlocker. The recording unit includes a transmission module for transmitting unlocking data, the transmission module is electrically connected to a recording module for recording unlocking data, the recording module is electrically connected to an arrangement module for arranging the recorded unlocking data, the arrangement module is electrically connected to a storage module for storing the arrangement data, the storage module is electrically connected to a processing module for processing the stored data, and the processing module is electrically connected The storage module is electrically connected to an ignore module for ignoring processing and a delete module for deleting stored data. The storage module is electrically connected to a query module for querying stored data. The transmission module transmits unlocking data, which is recorded by the recording module. The arrangement module sorts the unlocking data recorded by the recording module in chronological order. The storage module stores the arranged unlocking data. The query module can view the unlocking data in the storage module. The processing module is used to process the stored data in the storage module and process and analyze the unlocking information with an arrangement sequence exceeding 100. If the arrangement sequence number in the stored data does not exceed 100, it will be ignored by the ignore module. If the arrangement sequence number in the stored data exceeds 100, the stored data will be deleted by the delete module.
[0037] In this embodiment, the intelligent system can be controlled via Bluetooth and mobile phone app and keypad by entering a password. During the recording process of the recording module, mobile phone app recording authentication and keypad authentication are required. This is a prior art and will not be described in detail.
[0038] Among them, the locking and confirmation of the authorization application are realized through the cooperation of the authentication module and the locking module. The authentication module verifies the application information. If there is no authorization, the recording module is enabled to collect information to ensure that the data is accurate and complete. By cooperating with the recording unit and the analysis module, the unlocking device is successfully controlled and the unlocking information is recorded at the same time. If the match fails, the unlocking application that does not meet the conditions is automatically terminated. The authentication module cooperates with the locking module and the recording module to ensure that data recording can be correctly started when there is no authorization information, providing basic data for subsequent authorization recording and processing. The recording module cooperates with the intervention module and the data module to provide flexibility in operations such as data modification, deletion and renaming, ensuring the accuracy and legality of the recorded data. The data module cooperates with the intervention module to allow operations such as modification, deletion, and query of the data to ensure flexibility and accuracy of data processing. The intervention module works closely with the recording module and the data module to provide modification and deletion functions for the recorded data to ensure that the system can cope with changes and adjustment requirements. The analysis module cooperates with the unlocking module and the recording unit to control the unlocking operation after a successful match, and record the unlocking data and terminate. The module works together with the analysis module to ensure that invalid unlocking requests can be terminated immediately in the event of a mismatch. The recording module works together with the transmission module, arrangement module, etc. to ensure the correct transmission and storage of data, and sorts them by time for query and subsequent processing. The transmission module works together with the recording module to ensure that the unlocking data can be accurately transmitted and recorded. The arrangement module works together with the recording module and the storage module to ensure that the data is stored in order to facilitate subsequent operations. The storage module works together with the arrangement module and the query module to ensure the orderliness and queryability of data storage. By cooperating with the ignore module and the delete module, unnecessary data is cleaned up to ensure the efficient operation of the system. The deletion module works together with the processing module to ensure that data with more than 100 sequences are cleaned up in time to ensure that the working efficiency of the data storage hardware remains in the best state.
[0039] Working principle:
[0040] like Figure 1-12As shown, the three-dimensional linked arm intelligent cabinet door lock has an arm that can rotate, and the lock body and the buckle body 4 can be displaced to achieve three-dimensional multi-dimensional locking and unlocking. The lock body is equipped with a card reader, Bluetooth link and an intelligent passive electronic key to realize intelligent management of the linked arm lock. It is suitable for five-protection cabinets in the power system, various cabinets in the communication field, lockers, etc. The device consists of a main control body 3 and a buckle body 4, wherein the main control body 3 consists of a control mechanism, a rocker arm 32 that rotates in a free dimension and an electronic lock core 35, which can meet the multi-dimensional locking requirements of the cabinet door. The rocker arm 32 rotates to engage the buckle body 4 to achieve closing. There is a door open status light 33 on the rocker arm 32 to indicate the door open status, and a door closed status light indicator to indicate the door closed status. At the same time, the main control body 3 has a BLE Bluetooth link to the indicator light, and is connected to the Bluetooth of the mobile phone App at the same time. The door opening permission can be managed from the mobile phone App management interface. The main control body 3 has a Keypad, and the door is opened by entering the door opening password. The electronic smart lock core 35 can be Figure 9 The accessories shown cooperate with the lock control to open. The control mechanism of the main control body 3 is an electronic control component. The control mechanism has an Rs485 communication connection function, which supports the customer management platform to build a cabinet door management and monitoring system. The customer system platform can remotely control the door and start the authentication mode. It is ready to accept the user's permission authentication application. The authentication module receives the user's authorization application and verifies whether the information provided in the application meets the preset authorization requirements. If the information is valid, it continues to the unlock application stage. If the information is invalid, it jumps to the information recording stage, starts the recording mode, and starts to collect the applicant's personal information, such as identity information, fingerprints, facial recognition, etc. The recorded applicant information is saved to the data module and marked as authorized data. If the recorded data needs to be modified or deleted, the intervention module intervenes to modify, delete or rename the data. The user initiates an unlock request, the unlock unit receives the request and performs preliminary verification, and the analysis module analyzes the information of the unlock application and compares it with the authorized The unlocking module matches the right data. If the match is successful, the unlocking process is started. If the match fails, the unlocking application is terminated. If the match is successful, the unlocking module completes the actual unlocking by controlling the rocker arm 32 and other devices. The recording unit starts to record the unlocking data, including the unlocker information, timestamp and other related data. The transmission module transmits the recorded unlocking data to the recording module to ensure the accurate recording of the data. The arrangement module sorts the recorded data by time to ensure that the data is stored in the correct order. The arranged data is stored in the database through the storage module and ensures that the data can be quickly queried. The user can view the stored unlocking data through the query module. The intervention module allows the modification and deletion of the data. The processing module analyzes and processes the data exceeding 100. If the data sequence does not exceed 100, the processing is skipped through the ignore module. If the data sequence exceeds 100, the redundant data is deleted through the delete module to ensure the effective use of the system storage space.
[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. An easy-to-install authentication-opening linked arm smart door lock, comprising a door panel (1) and a frame (2), characterized in that: The door panel (1) and the frame (2) are rotatably connected. A main control body (3) is installed on one side of the door panel (1), and a buckle body (4) is installed on one side of the frame (2). The main control body (3) includes a main control mechanism (31). One side of the main control mechanism (31) is rotatably connected to a rocker arm (32). One side of the rocker arm (32) is provided with a door open status light (33). One side of the rocker arm (32) is provided with a door closed status light (34). One side of the main control mechanism (31) is provided with a lock core (35). The lock core (35) is installed inside the rocker arm (32). The inner wall of the rocker arm (32) is engaged with the buckle body (4). An intelligent system is provided inside the main control mechanism (31).
2. The easy-to-install authentication-opening linked-arm smart door lock according to claim 1, characterized in that: The intelligent system comprises an authentication unit for authority authentication, the authentication unit is electrically connected to an unlocking unit for unlocking a main control body (3), and the unlocking unit is electrically connected to a recording unit for recording unlocking data.
3. The easy-to-install authentication-opening linked-arm smart door lock according to claim 2, characterized in that: The authentication unit includes an authentication module for authority authentication, the authentication module is electrically connected to a locking module for locking an application and a recording module for recording authentication data, the recording module is electrically connected to a data module for data storage, and the data module is electrically connected to an intervention module for intervening in data module processing.
4. The easy-to-install authentication-opening linked-arm smart door lock according to claim 3, characterized in that: The authentication module turns on the authentication mode, and the authentication module analyzes whether the unlocking information of the required authorization application has authorization information. If the authentication module analyzes that the authorization application already has authorization information, the locking module locks the authorization application. If the authentication module analyzes that the authorization application does not have authorization information, the recording module turns on information recording, records various types of information of the applicant, and stores it in the data module for preservation, indicating that it is authorized data. At the same time, the recording module can be renamed during the recording process. If the recorded data needs to be deleted and changed, the intervention module intervenes in the data module to modify the name and delete the authorization permission.
5. The easy-to-install authentication-opening linked-arm smart door lock according to claim 2, characterized in that: The unlocking unit includes an analysis module for analyzing data information of the unlocking application, the analysis module is electrically connected to a termination module for terminating the unlocking application and an unlocking module for unlocking the door lock, and the unlocking module is electrically connected to a recording unit for recording unlocking information.
6. The easy-to-install authentication-opening linked-arm smart door lock according to claim 5, characterized in that: The unlocking unit is used by the unlocking user to apply for unlocking information, and then the analysis module obtains the authorized data in the data module for analysis and matching. If the analysis module analyzes that the unlocking information applied by the matching applicant matches the authorized data, the rocker (32) is controlled to open, and then the recording unit records the unlocking data of the unlocking user. If the analysis module analyzes that the unlocking information applied by the matching applicant does not match the authorized data, the termination module terminates the unlocking application of the unlocking user.
7. The easy-to-install authentication-opening linked-arm smart door lock according to claim 5, characterized in that: The recording unit includes a transmission module for transmitting unlocking data, the transmission module is electrically connected to a recording module for recording unlocking data, the recording module is electrically connected to an arrangement module for arranging the recorded unlocking data, the arrangement module is electrically connected to a storage module for storing the arrangement data, the storage module is electrically connected to a processing module for processing stored data, the processing module is electrically connected to an ignore module for ignoring processing and a delete module for deleting stored data, and the storage module is electrically connected to a query module for querying stored data.
8. The easy-to-install authentication-opening linked-arm smart door lock according to claim 7, characterized in that: The transmission module transmits unlocking data, which is recorded by the recording module. The arrangement module sorts the unlocking data recorded by the recording module and arranges them in chronological order. The storage module stores the arranged unlocking data. The query module can view the unlocking data in the storage module. The processing module is used to process the stored data in the storage module and process and analyze the unlocking information with an arrangement sequence exceeding 100. If the arrangement sequence number in the stored data does not exceed 100, it is ignored by the ignoring module. If the arrangement sequence number in the stored data exceeds 100, the stored data is deleted by the deleting module.