Mechanical coded lock with integrated metal shell

Abstract

The utility model discloses a mechanical coded lock with an integrated metal shell. The lock integrates the metal shell, a lock beam, an internal precise code input mechanism, a lock cylinder mechanism and a lock tongue mechanism. The metal shell is integrally formed and designed, 3-6 password wheels are arranged in the metal shell, passwords are input by rotating the password wheels, and the lock is controlled to be opened and closed through a complex mechanical transmission system in the lock. The metal shell is made of high-strength alloy through a die-casting process, so that the metal shell has excellent corrosion resistance and wear resistance, and the overall structural strength of the lock is remarkably improved. By optimizing the design of the lock body, the safety performance and the stability of the lock are effectively enhanced, the structural weakness possibly existing in a traditional split type shell is avoided, and a safer, more reliable and more durable password lock choice is provided for a user.

Description

Technical Field

[0001] This utility model relates to the field of locks, and more particularly to mechanical combination locks, specifically a mechanical combination lock with an integrated metal shell. Background Technology

[0002] Currently, mechanical combination locks, as a traditional type of security lock, are widely used in various settings such as homes, offices, and warehouses. However, these locks generally have some shortcomings in their design and use, especially in the structural design of the lock body.

[0003] Currently, most mechanical combination locks on the market do not use a one-piece design for their lock body; instead, they are composed of multiple parts connected by bolts, rivets, and other methods. While this design facilitates manufacturing and assembly, the seams between the parts result in insufficient overall structural strength of the lock body. Over prolonged use, these seams are prone to loosening, deformation, or even breakage, thus affecting the lock's security and reliability.

[0004] To improve the structural strength of lock bodies, manufacturers generally try to increase their size and weight. However, while this approach improves the strength of the lock body to some extent, it also brings new problems. On the one hand, the increased size and weight make the lock more inconvenient to install and use, especially in confined spaces such as interior doors and safes, where large locks are often difficult to install or use. On the other hand, excessive size and weight also increase manufacturing and transportation costs, hindering the product's market promotion and application.

[0005] Furthermore, existing mechanical combination locks also have shortcomings in the design of the password input mechanism, lock cylinder mechanism, and bolt mechanism. For example, the password input mechanism usually uses a simple dial or button, which is easily affected by external interference or misoperation; the lock cylinder mechanism is complex in design and easily damaged, making repair and replacement difficult; and the bolt mechanism often lacks effective anti-pry design, making it easy for criminals to pry it open with tools. Utility Model Content

[0006] The purpose of this invention is to overcome the aforementioned defects and propose a mechanical combination lock with a one-piece metal shell. This lock adopts a one-piece molded metal shell design, effectively improving the structural strength and overall stability of the lock body. Simultaneously, by optimizing the design of the password input mechanism, lock cylinder mechanism, and bolt mechanism, the security, reliability, and ease of use of the lock are improved. In particular, the bolt mechanism also features an anti-pry design, effectively preventing unauthorized opening and damage.

[0007] To achieve the above objectives, this utility model is implemented as follows:

[0008] A mechanical combination lock with an integrated metal shell includes an integrally formed metal shell (1) and a lock beam (21). The metal shell (1) has a groove on its upper part for hanging the lock on a door through the lock beam (21), and a password input area is provided below it. This area includes mounting holes for at least 3 to 6 combination wheels (12). Each mounting hole has a crossbar on both sides to indicate the current position of the combination wheel (12). The metal shell (1) is equipped with a password input mechanism, a lock cylinder mechanism and a lock tongue mechanism. The password input mechanism is used to receive and verify the password combination composed of at least three combination wheels (12). The lock cylinder mechanism controls the opening or locking of the lock tongue mechanism through mechanical transmission according to the password verification result. In addition, the metal shell (1) is connected to the lock beam seat (6) and the switch seat (20) through a pin (7) to form a closed structure to protect the components inside the metal shell (1).

[0009] The aforementioned mechanical combination lock with an integrated metal shell is formed by vacuum casting. The metal shell (1) is made of a high-strength alloy with excellent corrosion resistance and wear resistance, thereby enhancing the durability and security of the metal shell (1).

[0010] The aforementioned mechanical combination lock with an integrated metal shell has a steel lock beam (21) that has sufficient strength to resist a certain degree of cutting and knocking damage, thus ensuring the lock's security performance.

[0011] The aforementioned mechanical combination lock with an integrated metal shell includes a combination input mechanism comprising 3 to 6 combination wheels (12). The user inputs the combination by rotating the combination wheels (12). The rotation of the combination wheels (12) drives the code-changing block (14) to move. The movement of the code-changing block (14) further controls the position of the steel ball (15). Under the correct combination, the steel ball (15) aligns with the grooves of the cam (10) and the extended cam (11), allowing the cam (10) and the extended cam (11) to rotate smoothly, thereby triggering the unlocking action of the lock cylinder mechanism.

[0012] The aforementioned mechanical combination lock with an integrated metal shell, when the password is correct, the cam (10) and the extended cam (11) rotate smoothly under the guidance of the steel ball (15), and release the locked state of the latch mechanism through mechanical transmission. The lock beam compression spring (18) pushes the lock beam (21) to retract, realizing the unlocking action. If the password is incorrect, the steel ball (15) cannot be aligned with the groove of the cam (10) and the extended cam (11), the rotation of the cam and the extended cam is blocked, the latch mechanism remains in the extended state, and the lock remains locked.

[0013] The aforementioned mechanical combination lock with an integrated metal shell has a horizontal bar with numbers or symbols on both sides of each mounting hole in the password input area, which is used to indicate the current position of the combination wheel (12) so that the user can correctly input the password.

[0014] The aforementioned mechanical combination lock with an integrated metal shell includes a lock cylinder mechanism comprising a cam (10), an extended cam (11), a code-changing block (14), and a steel ball (15). The code-changing block (14) moves with the rotation of the combination wheel (12) to control the position of the steel ball (15) within a preset track. The position of the steel ball (15) determines whether the cam (10) and the extended cam (11) can rotate smoothly, thereby controlling the opening or locking of the lock tongue mechanism.

[0015] The aforementioned mechanical combination lock with an integrated metal shell includes a locking mechanism comprising a stop beam block (2), a stop beam block compression spring (3), a lock beam seat (6), a lock beam (21), and a lock beam compression spring (18). The stop beam block (2) is connected to the metal shell (1) via the stop beam block compression spring (3) to maintain the locking state of the lock beam (21). The lock beam (21) is installed in the lock beam seat (6) and maintains an outward extension tendency via the lock beam compression spring (18). When the password is correct and the cam (10) and the extended cam (11) rotate smoothly, the stop beam block (2) is moved by mechanical transmission to release the locking of the lock beam (21). The lock beam compression spring (18) pushes the lock beam (21) to retract, realizing the unlocking action. After unlocking, the stop beam block (2) is reset under the action of the stop beam block compression spring (3) to prepare for the next locking.

[0016] The aforementioned mechanical combination lock with an integrated metal casing also features an anti-pry design in its bolt mechanism. When the lock is subjected to unauthorized opening attempts, the mechanical components within the bolt mechanism can lock together and generate resistance, preventing the bolt from being opened unauthorizedly.

[0017] The aforementioned mechanical combination lock with an integrated metal shell has a metal shell (1) designed to meet waterproof and dustproof standards, ensuring the reliability and durability of the lock in outdoor environments. At the same time, the fit and sealing between the various mechanical parts have been optimized to improve the overall performance of the lock.

[0018] The mechanical combination lock with a one-piece metal shell proposed in this utility model has been optimized in terms of design and materials. It adopts a one-piece molded metal shell design, which effectively improves the structural strength and overall stability of the lock body, avoiding problems such as loosening, deformation, or breakage at joints that may occur with a split shell. At the same time, a high-strength alloy is preferred as the material for the metal shell, and it is formed through vacuum casting, giving the metal shell excellent corrosion resistance and wear resistance, significantly enhancing the durability and security of the lock.

[0019] Furthermore, this invention innovates in the design of the password input mechanism, lock cylinder mechanism, and bolt mechanism. The password input mechanism employs a combination input method consisting of at least three password wheels, using mechanical structures such as variable code blocks and steel balls to achieve accurate password verification and trigger the unlocking action, thus improving the accuracy and security of password input. The lock cylinder mechanism, through the precise coordination of mechanical components such as cams, extended cams, variable code blocks, and steel balls, achieves precise control of the password verification result and the opening or locking action of the bolt mechanism, reducing the difficulty of maintenance and replacement. In addition, the bolt mechanism also features an anti-pry design, effectively preventing damage to the lock from abnormal opening attempts. Finally, the metal shell design meets waterproof and dustproof standards, and the fit and sealing between various mechanical components have been optimized, further improving the reliability and durability of the lock in outdoor environments, as well as its overall performance. Attached Figure Description

[0020] Figure 1 This is an assembly drawing of the mechanical combination lock with an integrated metal shell shown in this utility model. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0022] A mechanical combination lock includes an integrally formed metal shell (1) and a lock beam (21); the metal shell (1) has a groove on the top to facilitate hanging the lock on the door through the lock beam (21); the metal shell (1) has a combination input area below it, which includes mounting holes for four combination wheels (12), each mounting hole has a crossbar on both sides and is marked with clear numbers or symbols so that the user can accurately identify the current position of the combination wheel (12).

[0023] Inside the metal casing (1), we have carefully constructed a password input mechanism, a lock cylinder mechanism, and a lock tongue mechanism. The password input mechanism is responsible for receiving and strictly verifying the password combination composed of three password wheels (12). The user needs to input the password by rotating each password wheel (12) to the preset number or symbol position. During this process, the rotation of the password wheel (12) will drive the code-changing block (14) to move accordingly, thereby controlling the specific position of the steel ball (15) within the preset track.

[0024] The lock cylinder mechanism includes key components such as a cam (10), an extended cam (11), a code-changing block (14), a steel ball (15), and a positioning spring (8). The code-changing block (14) moves flexibly with the rotation of the combination wheel (12), thereby precisely controlling the position of the steel ball (15). The precise position of the steel ball (15) directly determines whether the cam (10) and the extended cam (11) can rotate smoothly. When the entered code is completely correct, the steel ball (15) will perfectly align with the grooves of the cam (10) and the extended cam (11), allowing the cam and the extended cam to rotate smoothly under the guidance of the steel ball (15), and release the locking state of the bolt mechanism through a precise mechanical transmission system. At this time, the lock beam spring (18) will quickly push the lock beam (21) to retract, thereby successfully completing the unlocking operation. If the password is entered incorrectly, the steel ball (15) will not be able to align with the grooves of the cam (10) and the extended cam (11), which will hinder the rotation of the cam and the extended cam. The latch mechanism will remain extended to ensure that the lock is always locked.

[0025] The locking mechanism includes components such as a stop beam block (2), a stop beam block compression spring (3), a lock beam seat (6), a lock beam (21), and a lock beam compression spring (18). The stop beam block (2) is tightly connected to the metal shell (1) through the stop beam block compression spring (3), always maintaining the locked state of the lock beam (21). The lock beam (21) is securely installed in the lock beam seat (6) and maintains an outward extension tendency through the lock beam compression spring (18). When the password is entered correctly and the cam (10) and the extended cam (11) can rotate smoothly, the mechanical transmission system will push the stop beam block (2) to move, thereby releasing the lock beam (21). At this time, the lock beam compression spring (18) will immediately push the lock beam (21) to retract, realizing the unlocking action. After unlocking, the stop beam block (2) will quickly reset under the action of the stop beam block compression spring (3), making full preparation for the next locking operation.

[0026] The metal casing (1) of this lock is formed using an advanced die-casting process and is made of a high-strength alloy, giving it excellent corrosion resistance and wear resistance, significantly improving its durability and security. The lock beam (21) is made of high-quality steel, with sufficient strength to resist a certain degree of cutting and impact damage, thus ensuring the lock has excellent security performance. In addition, the metal casing (1) is tightly connected to the lock beam seat (6) and the switch seat (20) by pins (7), forming a closed structural system that provides comprehensive and effective protection for all components inside the metal casing (1).

[0027] In summary, the mechanical combination lock with an integrated metal shell proposed in this embodiment provides users with a safer, more durable and convenient lock option by adopting a combination input mechanism with three combination wheels (12), a precisely matched lock cylinder mechanism and a reliable lock tongue mechanism, combined with high-strength alloy material and a vacuum-cast metal shell (1).

[0028] In the mechanical combination lock with an integrated metal casing proposed in this embodiment, users can customize the combination settings using key components such as the switch shaft 13, cam 10, extended cam 11, and combination wheel 12. When setting or modifying the combination, users must follow these steps to ensure accurate operation:

[0029] Positioning switch: First, the user needs to locate and confirm the position of switch shaft 13. Switch shaft 13 is usually designed to be easily accessible and clearly marked so that the user can operate it quickly and accurately.

[0030] Press the switch: After confirming the position of switch shaft 13, the user should press the switch gently but firmly. This action will trigger the internal mechanism, causing cam 10 and extended cam 11 to begin axial movement. During this process, the user should feel some resistance or feedback, indicating that the internal mechanical structure is responding to the operation.

[0031] Interaction between the cam and the cipher wheel: As the cam 10 and the extended cam 11 move axially, the protrusions on them will rotate and shift relative to the cipher wheel 12. During this process, the numbers or symbols on the cipher wheel 12 will change their relative positions as the cams move, thereby enabling the cipher to be reset or modified.

[0032] Observation and Confirmation: After pressing the switch and observing a change in the numbers or symbols on the combination wheel 12, the user should carefully check and ensure that the new combination has been set correctly. This typically involves rotating the combination wheel 12 to verify that the new combination can be successfully unlocked.

[0033] Release switch: Once the new password setting is confirmed to be correct, the user should release switch shaft 13 to return it to its initial position. At this time, the internal mechanical structure will lock the newly set password, ensuring that it can only be unlocked when the correct password is entered.

[0034] Test the new password: To ensure the new password is valid and reliable, users should try unlocking the lock after completing the steps above. If all goes well, the lock should open successfully, verifying the success of the new password setting.

[0035] By following the steps above, users can easily set or change their password on this combination lock device, ensuring its security and convenience. Furthermore, because these steps are designed to be intuitive and easy to understand, even non-professionals can easily master and operate them.

[0036] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mechanical combination lock with an integrated metal casing, characterized in that, The device includes an integrally formed metal shell (1) and a lock beam (21). The metal shell (1) has a groove on its upper part for hanging the lock on the door through the lock beam (21), and a password input area is provided below it. This area includes mounting holes for at least three password wheels (12). Each mounting hole has a crossbar on both sides to indicate the current position of the password wheel (12). The metal shell (1) contains a password input mechanism, a lock cylinder mechanism, and a lock tongue mechanism. The password input mechanism is used to receive and verify the password combination composed of at least three password wheels (12). The lock cylinder mechanism controls the opening or locking of the lock tongue mechanism through mechanical transmission according to the password verification result. In addition, the metal shell (1) is connected to the lock beam seat (6) and the switch seat (20) through a pin (7) to form a closed structure to protect the components inside the metal shell (1).

2. The mechanical combination lock with an integrated metal shell according to claim 1, characterized in that, The metal shell (1) is formed by die casting and is made of high-strength alloy with excellent corrosion resistance and wear resistance to enhance the durability and safety of the metal shell (1).

3. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, The lock beam (21) is made of steel and has sufficient strength to resist a certain degree of cutting and hammering damage, ensuring the safety performance of the lock.

4. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, The password input mechanism is provided with 3 to 6 password wheels (12). The user inputs the password by rotating the password wheel (12). The rotation of the password wheel (12) drives the cam (10) and the extended cam (11) to move. The movement of the cam (10) and the extended cam (11) further controls the position of the steel ball (15). Under the correct password combination, the steel ball (15) is aligned with the groove of the cam (10) and the extended cam (11) and the switch shaft (13), allowing the cam (10) and the extended cam (11) to move smoothly with the cam hole of the lock body, thereby triggering the unlocking action of the lock cylinder mechanism.

5. The mechanical combination lock with an integrated metal casing according to claim 4, characterized in that, When the password is correct, the cam (10) and the extended cam (11) rotate smoothly under the guidance of the steel ball (15), and release the locked state of the latch mechanism through mechanical transmission. The lock beam spring (18) pushes the lock beam (21) to retract, realizing the unlocking action. If the password is wrong, the steel ball (15) cannot be aligned with the groove of the cam (10), the extended cam (11) and the switch shaft (13). The movement of the cam (10) and the extended cam (11) is blocked, the latch mechanism remains in the extended state, and the lock remains locked.

6. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, Each mounting hole in the password input area has a horizontal bar with numbers or symbols on both sides to indicate the current position of the password wheel (12), so that the user can correctly input the password.

7. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, The lock cylinder mechanism includes a cam (10), an extended cam (11), a code-changing block (14), and a steel ball (15). The code-changing block (14) has the following functions: when unlocking, it prevents the cam (10) and the extended cam (11) from moving excessively and causing password confusion; it also has a password setting function: when setting the password, the code-changing block must be moved first, and then the cam (10), the extended cam (11), and the switch shaft (13) must be moved before the password can be set.

8. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, The locking mechanism includes a stop beam block (2), a stop beam block compression spring (3), a lock beam seat (6), a lock beam (21), and a lock beam compression spring (18). The stop beam block (2) is connected to the metal shell (1) through the stop beam block compression spring (3) to maintain the locked state of the lock beam (21). The lock beam (21) is installed in the lock beam seat (6) and maintains the tendency to extend outward through the lock beam compression spring (18). When the password is correct and the cam (10) and the extended cam (11) move smoothly, the stop beam block (2) is pushed to move through mechanical transmission to release the lock beam (21). The lock beam compression spring (18) pushes the lock beam (21) to retract, realizing the unlocking action. After unlocking, the stop beam block (2) is reset under the action of the stop beam block compression spring (3) to prepare for the next locking.

9. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, The locking tongue mechanism also features an anti-pry design. When the lock is subjected to an abnormal opening attempt, the mechanical components inside the locking tongue mechanism can lock together and generate resistance to prevent the locking tongue from being opened abnormally.

10. The mechanical combination lock with an integrated metal casing according to claim 1, characterized in that, The metal casing (1) is designed to meet waterproof and dustproof standards, ensuring the reliability and durability of the lock in outdoor environments. At the same time, the fit and sealing between the various mechanical parts are optimized to improve the overall performance of the lock.

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