Door lock structure of concealed lock head

Abstract

The utility model relates to door lock technical field, concretely is door lock structure of hidden lock head, including lock body, the lock body is installed with mounting seat, is provided with hidden lock head on mounting seat, the outside of mounting seat is rotatably connected with drive sleeve, and hidden lock head inserts drive sleeve, and hidden lock head outer end installs drive handle, and drive handle installs hidden sleeve, and hidden sleeve hides lock hole by being covered in the outer end of hidden lock head, and hidden sleeve and drive sleeve are fixed between through bolt locking. The door lock structure of hidden lock head, in the safety aspect, the hidden design of lock hole is a big core highlight. The cooperation of hidden sleeve and hidden lock head, the locking of combination bolt, make the lock head completely hide when not using, from the root, solved the traditional door lock lock hole exposure easy dust, the problem of being interfered by outside sundries, avoid because lock hole blockage leads to door lock normal use.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, and more specifically, to a door lock structure with a concealed lock cylinder. Background Technology

[0002] In the field of door lock technology, security and practicality have always been key research and development directions. Traditional door locks have many problems. For example, the keyhole is often exposed, which not only easily accumulates dust and debris, affecting the normal locking effect, but also increases the risk of being forcibly opened or maliciously damaged, posing security risks to users. To solve these problems, existing technologies have made many attempts, such as the Chinese patent application number CN202322730727, which discloses a concealed door lock. This door lock uses a lock body with a specific structure, with an electromagnet electrically connected to an external controller. The electromagnet's attraction to the armature enables the door lock function, which enhances the door's wind resistance to a certain extent. Furthermore, the embedded installation method hides part of the lock body below the wall or ground, avoiding protrusion that affects use. However, this structure still has some shortcomings when dealing with complex and diverse usage scenarios. For example, the lock cylinder is not completely hidden, which cannot meet the needs of users in some places where the integrity of appearance and security are extremely important. Utility Model Content

[0003] The purpose of this utility model is to provide a door lock structure with a concealed lock head to solve the problems mentioned in the background art that still have some shortcomings when dealing with complex and diverse usage scenarios. For example, the lock head is not completely concealed, and it cannot meet the needs of users in some places where the overall appearance and security requirements are extremely high.

[0004] To achieve the above objectives, this utility model provides a door lock structure with a concealed lock head, including a lock body, a mounting base installed on the lock body, a concealed lock head disposed on the mounting base, a drive sleeve rotatably connected to the outer side of the mounting base, the concealed lock head being inserted into the drive sleeve, a drive handle installed at the outer end of the concealed lock head, a concealed sleeve installed on the drive handle, the concealed sleeve covering the outer end of the concealed lock head to conceal the lock hole, and the concealed sleeve and the drive sleeve being locked and fixed together by bolts.

[0005] This design involves mounting a mounting base on the lock body, placing the concealed lock cylinder on the mounting base, and rotatably connecting a drive sleeve to the outside of the mounting base with the concealed lock cylinder inserted therein. A drive handle is mounted on the outer end of the concealed lock cylinder, and the concealed sleeve is fitted over the outer end of the concealed lock cylinder to hide the keyhole. The concealed sleeve and drive sleeve are then locked together with bolts. Its core principle is to conceal the lock cylinder through the combination and fixation of these components, preventing the keyhole from being directly exposed to the external environment.

[0006] Preferably, the concealed lock head is adapted to the internal shape of the drive sleeve, and a clutch rod is installed at the other end of the drive sleeve. One end of the clutch rod is provided with a square rod, which cooperates with the lock cylinder inside the lock body.

[0007] This design features a concealed lock cylinder that conforms to the internal shape of the drive sleeve, ensuring stable power transmission. A clutch lever is mounted at the other end of the drive sleeve, with a square rod at one end. This square rod engages with the lock cylinder within the lock body, forming a transmission link from external operation to the internal lock cylinder movement. When the drive sleeve rotates, it drives the clutch lever, which in turn rotates the square rod, thus operating the lock cylinder.

[0008] Preferably, one end of the square rod is provided with a mating port, and the clutch rod is driven by a hidden lock head to extend and retract back and forth, thereby connecting and disengaging with the mating port.

[0009] This design features a mating port at one end of the square rod, with a concealed lock head driving the clutch rod to extend and retract. When unlocking is required, the concealed lock head activates, causing the clutch rod to extend and connect with the mating port on the square rod, thus establishing a transmission relationship. When unlocking is not required, the clutch rod retracts and disengages from the mating port, preventing accidental unlocking.

[0010] Preferably, the concealed lock includes a fixed shell, the size of which is adapted to the internal size of the drive sleeve. A rotating core is rotatably arranged inside the fixed shell, and a push rod is arranged inside the end of the rotating core near the clutch lever. The rotating core is driven to rotate by a key, which in turn drives the push rod to rotate and drives the clutch lever to extend.

[0011] This design features a concealed lock head housing that is compatible with the internal dimensions of the drive sleeve, providing a stable mounting base. A rotating core is rotatably mounted inside the housing, with a push rod at one end. When the key is inserted into the rotating core and turned, it rotates the core, which in turn rotates the push rod. The force generated by the rotating push rod drives the clutch lever to extend.

[0012] Preferably, a guide pin is installed on the side of the top rod, and the outer shell of the rotating core is provided with an arc-shaped guide groove. The guide pin cooperates with the guide groove. When the rotating core rotates, the guide pin is driven to move axially through the cooperation between the guide pin and the guide groove.

[0013] This feature includes a guide pin mounted on the side of the push rod and an arc-shaped guide groove on the outer shell of the rotating core. When the rotating core rotates, the guide pin moves within the guide groove. Because the guide groove is arc-shaped, the guide pin will drive the push rod to move axially during its movement, thereby converting the rotational motion into the axial motion of the push rod, which in turn drives the clutch rod to extend or retract.

[0014] Preferably, the clutch rod and the push rod are connected by magnetic adsorption.

[0015] This design uses magnetic attraction to connect the clutch lever and the push rod. When the push rod extends under the drive of the rotating core, the magnetic attraction tightly connects the clutch lever and the push rod, thereby enabling the transmission of power.

[0016] Preferably, the clutch lever and the square lever are normally separated. When the drive handle rotates, the clutch lever is driven to rotate freely through the drive sleeve. When the clutch lever is extended by the hidden lock head to connect with the mating port, the drive handle rotates, and the clutch lever is driven to rotate through the drive sleeve, thereby rotating the square lever. Then, the lock tongue is opened by the square lever cooperating with the lock body.

[0017] In this configuration, the clutch lever and the square bar are normally disengaged. When the drive handle is turned, the clutch lever rotates freely via the drive sleeve, without engaging the lock body. When the key is used to drive the concealed lock cylinder, extending the clutch lever and connecting it to the mating joint of the square bar, turning the drive handle again causes the drive sleeve to rotate the clutch lever, which in turn rotates the square bar. The square bar then engages with the lock body to open the bolt.

[0018] Preferably, the outer wall of the drive handle is provided with external threads.

[0019] This feature includes external threads on the outer wall of the drive handle. When installing the drive handle, it can be threadedly connected to other components with internal threads to achieve a fixed installation. At the same time, the presence of external threads increases the friction on the surface of the drive handle, providing a better grip and stability when holding the drive handle for unlocking operations.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: In terms of security, the concealed keyhole design is a core highlight of this hidden lock structure. The combination of the concealed sleeve and the concealed lock head, along with the tightening of bolts, ensures the lock head is completely hidden when not in use. This fundamentally solves the problems of exposed keyholes in traditional locks, which are prone to dust accumulation and interference from external debris, preventing the lock from malfunctioning due to blockage. At the same time, the completely concealed lock head significantly reduces the risk of forced entry or malicious damage, such as preventing criminals from using tools to forcibly insert into the keyhole to unlock the lock. This provides users with more reliable security protection and meets the needs of locations with extremely high security requirements. In terms of reliability and stability, the clever cooperation between the concealed lock cylinder and components such as the drive sleeve, clutch lever, and square lever creates a stable and precise transmission system. The internal shape of the concealed lock cylinder and drive sleeve is adapted to ensure accurate power transmission. The linkage design of the rotating core, push rod, guide pin, and guide groove allows the push rod to stably achieve axial extension and retraction when the key drives the rotating core, thereby reliably driving the clutch lever to extend and connect with the square lever's mating port. This ensures stable transmission between components during mechanical key unlocking, reducing malfunctions caused by transmission problems and improving the overall reliability and durability of the lock. The magnetic adsorption connection between the clutch lever and push rod, while achieving stable transmission, effectively reduces mechanical wear, further enhancing the long-term stability of the lock and extending its service life. In terms of ease of operation and practicality, the door lock's unique working mode balances daily security and emergency unlocking needs. Under normal conditions, the outer handle is free-rotating when pressed down, preventing accidental opening and improving daily security. When the electronic key fails to unlock, a simple operation—such as removing the handle's fixing screws or removing the handle itself—exposes the concealed lock cylinder. Inserting the key and following the steps allows for backup unlocking. The process is simple and easy to understand, requiring no complex tools or professional skills, enabling users to quickly unlock in emergencies. Furthermore, the external thread design on the handle's outer wall provides better stability and comfort for installation and grip, optimizing the user experience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is one of the structural schematic diagrams of the concealed lock head in this utility model; Figure 5 This is the second schematic diagram of the concealed lock head in this utility model; The meanings of the labels in the diagram are as follows: 1. Lock body; 2. Mounting base; 21. Drive sleeve; 3. Drive handle; 31. Concealed sleeve; 4. Bolt; 5. Concealed lock cylinder; 51. Fixed shell; 52. Rotating core; 521. Guide groove; 53. Top rod; 54. Guide pin; 6. Square rod; 61. Mating joint; 62. Clutch rod; 7. Key. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a door lock structure with a concealed lock cylinder, such as... Figure 1 , Figure 2 As shown, the lock includes a lock body 1, a mounting base 2 is mounted on the lock body 1, a concealed lock head 5 is provided on the mounting base 2, a drive sleeve 21 is rotatably connected to the outside of the mounting base 2, the concealed lock head 5 is inserted into the drive sleeve 21, a drive handle 3 is mounted on the outer end of the concealed lock head 5, a concealed sleeve 31 is mounted on the drive handle 3, the concealed sleeve 31 is fitted over the outer end of the concealed lock head 5 to conceal the lock hole, and the concealed sleeve 31 and the drive sleeve 21 are locked and fixed together by bolts 4.

[0024] Mounting base 2 is installed on lock body 1, and concealed lock head 5 is set on mounting base 2. Drive sleeve 21 is rotatably connected to the outside of mounting base 2, and concealed lock head 5 is inserted into it. Drive handle 3 is installed on the outer end of concealed lock head 5. Concealed sleeve 31 is fitted over the outer end of concealed lock head 5 to hide the lock hole. Then, bolt 4 is used to lock and fix concealed sleeve 31 and drive sleeve 21. Its core principle is to achieve the concealment of the lock head through the combination and fixation of various components, avoiding direct exposure of the lock hole to the external environment. This effectively prevents dust and debris from entering the lock hole, reduces the occurrence of lock hole blockage, and extends the service life of the door lock; at the same time, it greatly reduces the possibility of criminals forcibly opening the lock by damaging the lock hole, significantly improving the security of the door lock; the concealed design also makes the door lock more concise and beautiful in appearance, enhancing the overall decorative effect.

[0025] In this embodiment, as Figure 3 As shown, the concealed lock head 5 is adapted to the internal shape of the drive sleeve 21. The other end of the drive sleeve 21 is equipped with a clutch rod 62. One end of the clutch rod 62 is provided with a square rod 6, which cooperates with the lock cylinder inside the lock body 1.

[0026] The concealed lock cylinder 5 is internally fitted to the drive sleeve 21, ensuring stable power transmission. A clutch lever 62 is installed at the other end of the drive sleeve 21, with a square rod 6 at one end. The square rod 6 engages with the lock cylinder inside the lock body 1, forming a transmission link from external operation to the internal lock cylinder movement. When the drive sleeve 21 rotates, it drives the clutch lever 62, which in turn drives the square rod 6 to rotate, thus operating the lock cylinder. This precise shape fit ensures the stability and accuracy of power transmission, preventing slippage and free spin, making the lock operation more reliable. The connection between the clutch lever 62 and the square rod 6 effectively transmits external operating force to the lock cylinder inside the lock body 1, enabling normal opening and closing of the lock and ensuring its practicality.

[0027] Specifically, such as Figure 3 As shown, one end of the square rod 6 is provided with a mating port 61, and the clutch rod 62 is driven by the hidden lock head 5 to extend and retract back and forth, so as to connect and disconnect with the mating port 61.

[0028] A mating port 61 is provided at one end of the square rod 6, and the concealed lock cylinder 5 drives the clutch rod 62 to extend and retract. When unlocking is required, the concealed lock cylinder 5 actuates, causing the clutch rod 62 to extend and connect with the mating port 61 of the square rod 6, thus establishing a transmission relationship; when unlocking is not required, the clutch rod 62 retracts and disengages from the mating port 61 to prevent accidental unlocking. This achieves controllability in the connection and disengagement between the clutch rod 62 and the square rod 6, ensuring the security of the door lock under normal conditions and preventing accidental opening; when unlocking with a mechanical key is required, it can reliably establish transmission, making operation more flexible and safer, further improving the security and ease of use of the door lock.

[0029] Furthermore, the concealed lock cylinder 5 includes a fixed shell 51, the size of which is adapted to the internal size of the drive sleeve 21. A rotating core 52 is rotatably arranged inside the fixed shell 51. A push rod 53 is arranged inside the end of the rotating core 52 near the clutch lever 62. The rotating core 52 is driven to rotate by the key 7, which in turn drives the push rod 53 to rotate, thereby driving the clutch lever 62 to extend.

[0030] The fixed housing 51 of the concealed lock cylinder 5 is internally adapted to the drive sleeve 21, providing a stable installation base. A rotating core 52 is rotatably mounted inside the fixed housing 51. A push rod 53 is located inside one end of the rotating core 52. When the key 7 is inserted into the rotating core 52 and rotated, it drives the rotating core 52 to rotate, which in turn causes the push rod 53 to rotate. The force generated by the rotation of the push rod 53 drives the clutch rod 62 to extend. This clarifies the power generation and transmission mechanism inside the concealed lock cylinder 5. The key 7 drives the rotating core 52 and the push rod 53, achieving precise control of the clutch rod 62 and providing a reliable power source for mechanical key unlocking. The adaptation between the fixed housing 51 and the drive sleeve 21 ensures the stability of the concealed lock cylinder 5 during operation, making the entire unlocking process smoother and more reliable.

[0031] Furthermore, such as Figure 4 , Figure 5 As shown, a guide pin 54 is installed on the side of the top rod 53, and an arc-shaped guide groove 521 is provided on the outer shell of the rotating core 52. The guide pin 54 cooperates with the guide groove 521. When the rotating core 52 rotates, the guide pin 54 is driven to move axially through the cooperation between the guide pin 54 and the guide groove 521.

[0032] A guide pin 54 is mounted on the side of the top rod 53, and an arc-shaped guide groove 521 is provided on the outer shell of the rotating core 52. When the rotating core 52 rotates, the guide pin 54 moves within the guide groove 521. Because the guide groove 521 is arc-shaped, the guide pin 54 drives the top rod 53 to move axially during its movement, thereby converting the rotational motion into the axial motion of the top rod 53, which drives the clutch rod 62 to extend or retract. Through the ingenious cooperation between the guide pin 54 and the guide groove 521, the conversion of motion is achieved, accurately converting the rotational motion generated by the key 7 into the axial motion of the top rod 53, ensuring the accuracy and stability of the extension and retraction of the clutch rod 62. This structural design makes the transmission of the concealed lock cylinder 5 more reliable, reduces errors and jamming during the movement process, and improves the overall reliability and durability of the door lock.

[0033] Furthermore, the clutch lever 62 and the push rod 53 are connected by magnetic adsorption.

[0034] The clutch lever 62 and the push rod 53 are connected by magnetic attraction. When the push rod 53 extends under the drive of the rotating core 52, the magnetic attraction tightly connects the clutch lever 62 and the push rod 53, thus enabling power transmission. When separation is required, external force can overcome the magnetic attraction to separate them. Compared with traditional mechanical connections, magnetic attraction reduces mechanical friction and wear, lowers component wear, and extends the service life of the door lock. At the same time, magnetic attraction has a certain buffering effect, making the transmission process smoother, reducing the impact and noise that may be caused by rigid connections, and improving the comfort and stability of the door lock.

[0035] Furthermore, the clutch lever 62 and the square lever 6 are normally separated. The drive handle 3 rotates, which drives the clutch lever 62 to rotate freely through the drive sleeve 21. When the clutch lever 62 is extended by the hidden lock head 5 to connect with the mating port 61, the drive handle 3 rotates, which drives the clutch lever 62 to rotate through the drive sleeve 21, thereby rotating the square lever 6. Then, the square lever 6 cooperates with the lock body 1 to open the bolt.

[0036] The clutch lever 62 and the square lever 6 are normally disengaged. When the drive handle 3 rotates, the drive sleeve 21 causes the clutch lever 62 to rotate freely, without unlocking the lock body 1. When the key 7 drives the concealed lock cylinder 5, causing the clutch lever 62 to extend and connect with the mating port 61 of the square lever 6, rotating the drive handle 3 again causes the drive sleeve 21 to rotate the clutch lever 62, which in turn rotates the square lever 6. The square lever 6 then engages with the lock body 1 to open the bolt. This operating mode ensures the security of the lock under normal conditions, preventing accidental unlocking due to accidental contact with the drive handle 3. In special circumstances such as electronic key failure, reliable unlocking via the mechanical key provides dual protection, increasing the flexibility and reliability of the lock. The clear operating logic makes the lock operation more controllable, facilitating user understanding and use.

[0037] Furthermore, the outer wall of the drive handle 3 is provided with external threads.

[0038] The drive handle 3 has external threads on its outer wall. During installation, it can be threadedly connected to other threaded components such as mounting bases or fasteners on the door frame to securely install the drive handle 3. Simultaneously, the external threads increase the friction on the surface of the drive handle 3, providing a better grip and stability when holding it for unlocking operations. This facilitates the installation and removal of the drive handle 3, making the installation, maintenance, and replacement of the door lock more convenient. The increased friction from the external threads effectively prevents hand slippage during unlocking, improving operational convenience and safety, and optimizing the user experience.

[0039] In use, the concealed lock structure of this utility model, under normal circumstances, has the clutch lever 62 and the square rod 6 in a disengaged state. At this time, even if the drive handle 3 is rotated, the drive sleeve 21 will only cause the clutch lever 62 to rotate freely, unable to transmit rotational force to the square rod 6, thus not triggering the lock cylinder action within the lock body 1, and the bolt remains locked. This design effectively avoids accidental opening of the lock due to accidental contact with the drive handle 3, ensuring safety during daily use. Simultaneously, the concealed sleeve 31 is fitted onto the outer end of the concealed lock cylinder 5 and locked to the drive sleeve 21 by bolts 4, completely concealing the keyhole, preventing dust and debris from entering, reducing the risk of keyhole damage, and further improving the security and service life of the lock. When the electronic key fails to unlock the door and a mechanical key is required, the specific procedure is as follows: Preparation: First, remove the fixing screws on the drive handle 3 and remove the drive handle 3. At this time, the hidden lock head 5 will be exposed. The external thread design on the outer wall of the drive handle 3 makes the disassembly process relatively convenient and facilitates the quick exposure of the hidden lock head 5. Key insertion and operation: Insert key 7 into the rotating core 52 of the concealed lock cylinder 5 and rotate it. The rotation of key 7 causes the rotating core 52 to rotate. Since the guide pin 54 installed on the side of the push rod 53 cooperates with the arc-shaped guide groove 521 of the outer shell of the rotating core 52, when the rotating core 52 rotates, the guide pin 54 moves in the guide groove 521, thereby causing the push rod 53 to move axially. The rotation and axial movement of the push rod 53 generate a force that drives the clutch lever 62 to extend. Establishing the transmission connection: The clutch lever 62 extends under the drive of the push rod 53. Since the clutch lever 62 and the push rod 53 are connected by magnetic attraction, the magnetic attraction force keeps them tightly connected during the extension of the push rod 53, ensuring power transmission. After the clutch lever 62 extends, it connects with the mating port 61 at one end of the square rod 6. At this point, the transmission link from the drive handle 3 to the square rod 6 is established. Unlocking operation: Turn the drive handle 3 again, the drive sleeve 21 drives the clutch rod 62 to rotate, and the clutch rod 62 in turn drives the square rod 6 to rotate. The square rod 6 cooperates with the lock cylinder in the lock body 1, and the lock tongue is opened by rotation, thus completing the unlocking action.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A door lock structure with a concealed lock cylinder, comprising a lock body (1), characterized in that: The lock body (1) is equipped with a mounting base (2), and a hidden lock head (5) is provided on the mounting base (2). A drive sleeve (21) is rotatably connected to the outside of the mounting base (2). The hidden lock head (5) is inserted into the drive sleeve (21). A drive handle (3) is installed on the outer end of the hidden lock head (5). A hidden sleeve (31) is installed on the drive handle (3). The hidden sleeve (31) is fitted over the outer end of the hidden lock head (5) to hide the lock hole. The hidden sleeve (31) and the drive sleeve (21) are locked together by bolts (4).

2. The door lock structure with a concealed lock cylinder according to claim 1, characterized in that: The concealed lock head (5) is adapted to the internal shape of the drive sleeve (21). The other end of the drive sleeve (21) is equipped with a clutch rod (62). One end of the clutch rod (62) is provided with a square rod (6). The square rod (6) cooperates with the lock cylinder inside the lock body (1).

3. The door lock structure with a concealed lock cylinder according to claim 2, characterized in that: One end of the square rod (6) is provided with a mating port (61), and the clutch rod (62) is driven to extend and retract back and forth by a hidden lock head (5) to achieve connection and disengagement with the mating port (61).

4. The door lock structure with a concealed lock cylinder according to claim 3, characterized in that: The concealed lock (5) includes a fixed shell (51), the size of which is adapted to the internal size of the drive sleeve (21). A rotating core (52) is rotatably arranged inside the fixed shell (51). A top rod (53) is arranged inside the rotating core (52) near the clutch rod (62). The rotating core (52) is driven to rotate by the key (7), which in turn drives the top rod (53) to rotate and drives the clutch rod (62) to extend.

5. The door lock structure with a concealed lock cylinder according to claim 4, characterized in that: A guide pin (54) is installed on the side of the top rod (53). The outer shell of the rotating core (52) is provided with an arc-shaped guide groove (521). The guide pin (54) cooperates with the guide groove (521). When the rotating core (52) rotates, the guide pin (54) moves axially through the cooperation between the guide pin (54) and the guide groove (521).

6. The door lock structure with a concealed lock cylinder according to claim 4, characterized in that: The clutch rod (62) and the push rod (53) are connected by magnetic adsorption.

7. The door lock structure with a concealed lock cylinder according to claim 5, characterized in that: The clutch lever (62) and the square rod (6) are normally separated. When the drive handle (3) rotates, the clutch lever (62) is driven to rotate freely through the drive sleeve (21). When the clutch lever (62) is extended by the hidden lock head (5) to connect with the mating port (61), the drive handle (3) rotates and the clutch lever (62) is driven to rotate through the drive sleeve (21), thereby rotating the square rod (6). Then, the square rod (6) cooperates with the lock body (1) to open the lock tongue.

8. The door lock structure with a concealed lock cylinder according to claim 1, characterized in that: The outer wall of the drive handle (3) is provided with external threads.

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