Cylindrical lock body

Abstract

This application discloses a cylindrical lock body, comprising a lock shell, a bolt panel, a flip-up bolt, a guide block, a first elastic element, a locking block, a second elastic element, a gear-equipped assembly, and a motor assembly. The flip-up bolt has a positioning groove, and the first extension rod of the locking block can be embedded in the groove to restrict the bolt's rotation. The second elastic element drives the locking block to remain in the locked position, and the drive motor drives the gear-equipped assembly to push the locking block to the unlocked position. Addressing the shortcomings of traditional cylindrical locks that only allow manual unlocking and lack intelligent features, this structure integrates an electromechanical drive mechanism within a small cylindrical lock shell. The drive motor can drive the locking block to release the bolt's rotation restriction, achieving electric unlocking without manual operation. The compact design does not increase the overall size of the lock body; in the locked position, the bolt plane is pressed and cannot retract, allowing the bolt to retract normally to close the door. After unlocking, the bolt can rotate to avoid obstruction, balancing anti-theft performance with ease of use, improving the lock's intelligence and user experience.

Description

Technical Field

[0001] This invention relates to the field of locks, and more specifically to a cylindrical lock body. Background Technology

[0002] All cylindrical lock bodies are manually controlled for unlocking, such as traditional American standard door locks. Compared to electrically controlled smart locks, the user experience of existing cylindrical lock bodies needs further improvement. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a cylindrical lock body.

[0004] The technical solution adopted in this invention is as follows:

[0005] A cylindrical lock body, comprising: A lock case, having a hollow cylindrical shell, with an opening at one end; A latch panel is fixed at the opening of the lock housing, and the latch panel has a tongue hole corresponding to the opening of the lock housing; A flip-up latch is movably mounted on the lock housing. The flip-up latch has a latch portion and an anti-disengagement portion. The latch portion has an inclined surface and a working surface. The latch portion can pass through the tongue hole of the lock tongue panel. The anti-disengagement portion is used to cooperate with the lock tongue panel to prevent the flip-up latch from completely disengaging from the lock housing. When the anti-disengagement portion cooperates with the lock tongue panel, the flip-up latch is in the latch extension working position. The flip-up latch has a mating surface and a positioning groove. A guide block is slidably disposed in the lock housing, and the guide block engages with the mating surface of the flip-up tongue; The first elastic element is disposed in the lock housing and cooperates with the guide block to give the guide block a tendency to push the flipping latch to move outward of the lock housing; A locking block is slidably or rotatably mounted on a lock housing. One end of the locking block has a first extension rod, and the other end has a second extension rod. The first extension rod engages with the positioning groove of the flip-hook. The locking block has a locking position and an unlocking position. When the locking block is in the locking position, the first extension rod is embedded in the positioning groove, and the flip-hook cannot rotate but can only slide along the axis of the housing. When the locking block is in the unlocking position, the first extension rod disengages from the positioning groove, and the flip-hook can rotate and slide. When the locking block is in the locking position and the flip-hook is in the extended position, the working surface of the flip-hook is pressed, and the flip-hook remains stationary. The inclined surface of the flip-hook is pressed, and the flip-hook slides into the lock housing along the axis of the housing. When the locking block is in the unlocking position and the flip-hook is in the extended position, the working surface of the flip-hook is pressed, and the flip-hook rotates and slides, moving into the lock housing. The second elastic element is disposed in the lock housing and cooperates with the locking block to give the locking block a tendency to switch to the locking position. A cam gear is rotatably mounted on the lock housing. The cam gear has a first driving protrusion. The cam gear is used to cooperate with the second extension rod through the first driving protrusion to drive the locking block to move, so that the locking block can switch to the unlocking position. A motor assembly, disposed in the lock housing, is used to drive the geared component to rotate.

[0006] Addressing the technical problems of traditional cylindrical lock bodies that can only be manually unlocked, lack electric control functions, and have a poor user experience, this invention innovatively integrates a motor assembly, a gear drive structure, a locking block limiting structure, and a flip-lock latch engagement structure within a small, hollow cylindrical lock body. The motor assembly drives the rotation of a cam gear, which in turn causes the locking block to switch its working position, achieving automatic electric switching between the locked and unlocked states of the flip-lock latch. This breaks the limitation of traditional American standard cylindrical locks, which rely entirely on manual mechanical operation, and realizes intelligent electric unlocking functionality. Simultaneously, this application utilizes the limited internal space of the lock body to achieve an integrated electromechanical layout, realizing electric control without increasing the lock body's size, effectively improving the intelligence and ease of use of the cylindrical lock body, and significantly optimizing the user experience. Through differentiated limiting of the flip-lock latch's rotation and sliding freedom by the locking block, it also achieves door lock logic that prevents accidental opening when closing and adapts to pressure, resulting in higher lock body operational stability.

[0007] Although the lock case and the latch panel are described separately in this application, it still includes the case where the latch panel can be a part of the lock case structure, that is, the latch panel and part of the lock case structure are integrally formed.

[0008] When the latch panel is an independent part, the latch panel being fixed at the opening of the housing, as mentioned in this application, means that it can be fixed in various ways, such as fastener connection, snap-fit, bonding, welding, etc.

[0009] In practical applications, the various elastic elements of this application can be selected as needed, and can be in various forms such as compression springs, torsion springs, and spring sheets.

[0010] In one embodiment of the present invention, the locking block is rotatably disposed within the lock housing; The first extension rod and the second extension rod are arranged along the length direction of the housing. The locking block also includes a middle rod. The locking block is Z-shaped. The first extension rod, the middle rod and the second extension rod are connected in sequence. The rotation axis of the locking block is located at one end of the intermediate rod adjacent to the first extension rod.

[0011] Preferably, in this application, the positioning groove is located on one side of the oblique tongue, and the first extension rod and the positioning groove are arranged on the same side.

[0012] Addressing the technical challenges of traditional cylindrical lock bodies that can only be manually unlocked, are difficult to upgrade to intelligent systems, and suffer from limited internal space and difficulty in arranging electric drive structures, this application designs the locking block as a Z-shaped integral structure, with its rotation axis eccentrically positioned at the end of the middle rod near the first extension rod. Utilizing the bending structure of the Z-shaped rod to create natural clearance space, this effectively avoids spatial interference issues within the confined lock body, reserving ample assembly space for core electric components such as convex gears and motor assemblies. This effectively solves the industry difficulty of integrating electric unlocking structures into compact cylindrical lock bodies. Simultaneously, the eccentric rotation layout effectively amplifies the drive stroke, allowing even small rotations of the gears to reliably drive the locking block to complete the locking and unlocking position switching, resulting in sensitive transmission response and smooth, stable operation.

[0013] In one embodiment of the present invention, a front housing mounting bracket and a rear housing mounting bracket are further fixed inside the lock housing, the front housing mounting bracket being adjacent to the latch panel and the rear housing mounting bracket being away from the latch panel. The guide block is slidably mounted on the front housing mounting bracket, and the flipping tongue is movably disposed on the front housing mounting bracket; The first elastic element is disposed between the front housing mounting bracket and the guide block; The locking block is rotatably mounted on the front shell mounting bracket or the rear shell mounting bracket; The cam gear is rotatably mounted on the rear housing mounting bracket, and the motor assembly is mounted on the rear housing mounting bracket.

[0014] In this application, when the lock case is a non-adjustable lock case, the front case mounting bracket and the rear case mounting bracket can be independent of each other or connected to each other to form an integral mounting bracket.

[0015] In one embodiment of the present invention, the front shell mounting bracket has two fixed plates spaced apart; the front shell mounting bracket also has a support plate located at the end of the two fixed plates away from the latch panel, the support plate and the two fixed plates forming an active space for the flip latch and guide block to move; The fixing plate has a strip-shaped hole arranged along the length of the lock case, the guide block is arranged between the two fixing plates, and the guide block has a slider that extends into the strip-shaped hole; The first elastic element is a compression spring disposed between the support plate and the guide block.

[0016] A semi-enclosed or enclosed movable cavity is formed by double fixed plates and a support plate, and the guide slider and strip hole enable precise sliding of the guide block. The front shell mounting bracket can reliably limit the flip-up tongue and the guide block, ensuring that the flip-up tongue can slide linearly or flip.

[0017] In one embodiment of the present invention, the motor assembly includes a drive motor connected to a reducer and an output gear fixed on the output shaft of the reducer, the output gear meshing with the convex gear; A circuit board and a signal switch are mounted on the rear housing mounting bracket. The circuit board is electrically connected to the drive motor and the signal switch. The signal switch has a trigger head that can rotate bidirectionally. The convex gear has a notch, and the rear housing mounting bracket has a limiting portion that extends into the notch; The convex gear also has a positioning convex part, and the trigger head is located in the space between the positioning convex part and the first driving convex part; The gear-equipped device has a locked state and an unlocked state. When the cam gear is in the locked state, the limiting part abuts against one end of the notch, the first driving protrusion moves away from the second extension rod, and the first driving protrusion contacts the trigger head, causing the trigger head to rotate in the first direction; When the cam gear is in the unlocked state, the limiting part abuts against the other end of the notch, the first driving protrusion contacts and engages with the second extension rod, driving the locking block to rotate, so that the locking block switches to the unlocked working position, and the positioning protrusion contacts the trigger head, so that the trigger head rotates in the second direction.

[0018] The signal switch of this application generates different signals when the trigger head rotates in different directions. The rotational limit position of the cam gear is limited by the contact fit between the limiting part and both ends of the notch.

[0019] The motor reduction drive structure, gear limit structure, and bidirectional signal switch enable precise drive, travel limit, and status detection for the electric unlocking of the cylindrical lock body. The limit section, in conjunction with the notch, restricts the rotational travel of the cam gear, preventing over-driving jamming and structural damage. The bidirectional trigger signal switch accurately identifies whether the cam gear is locked or unlocked, providing precise status feedback to the intelligent lock control system.

[0020] In one embodiment of the present invention, the convex gear includes a gear body, the first driving convex part and the positioning convex part are both located on the periphery of the gear body and protrude along the axial direction of the gear body; the second extension rod is offset from the gear body in the circumferential direction of the gear body.

[0021] The first driving protrusion is located on the periphery of the gear body and protrudes along the axial direction of the gear body, while the second extension rod is offset from the gear body in the circumferential direction. This arrangement further reduces the space occupied by the electric drive structure, achieving high-density integration within a narrow cylindrical space.

[0022] In one embodiment of the present invention, the cylindrical lock body further includes a square steel connector rotatably mounted on the bracket with the convex gear and / or the rear shell mounting bracket. The square steel connector is used for an external square steel to pass through. The square steel connector has a square steel hole that mates with the external square steel. The lock shell has an insertion hole corresponding to the square steel hole. The square steel connector has one or two second driving protrusions; the second driving protrusion is used to contact and cooperate with the second extension rod when the square steel connector is driven to rotate by the external square steel, thereby driving the locking block to rotate and switching the locking block to the unlocking position; when the square steel connector has two second driving protrusions, the locking block can be switched to the unlocking position when the square steel connector rotates in any direction.

[0023] The cylindrical lock body of this application retains the traditional manual square steel unlocking function. This allows the lock body to have both electric intelligent unlocking and mechanical manual emergency unlocking modes. In normal scenarios, electric unlocking can improve the user experience, while in special scenarios such as motor failure or power outage, manual emergency unlocking can be performed to avoid the problem of failure and jamming.

[0024] The term "square steel" in this application is used in a general sense and is not limited to steel with a rectangular cross-section.

[0025] In one embodiment of the present invention, the lock housing has two housings, namely a front housing and a rear housing, both housings having a hollow columnar portion, and the lock housing also having an adjustable positioning member, wherein the hollow columnar portion of the rear housing is slidably fitted onto the hollow columnar portion of the front housing; The front shell mounting bracket is installed in the hollow columnar part of the front shell, and the rear shell mounting bracket is installed in the hollow columnar part of the rear shell. The adjustable positioning component is mounted on the rear shell mounting bracket; the side wall of the hollow columnar part of the rear shell has a first through hole, and the side wall of the hollow columnar part of the front shell has a plurality of second through holes spaced apart along the axial direction of the hollow columnar part. The adjustable positioning component is used to extend into the corresponding first through hole and second through hole to fix the two hollow columnar parts relative to each other. The intermediate rod of the locking block is rotatably mounted on the front housing mounting bracket, and the intermediate rod and the second extension rod form a clearance space for the rear housing mounting bracket to move and adjust.

[0026] When converting a traditional American standard door lock to an electric drive, two different lock housing specifications need to be designed, which is costly and inconvenient for dealers to stock. This application addresses this issue by using a sliding fit between the hollow cylindrical portions of the front and rear housings, and by utilizing an adjustable positioning element that selectively extends into a second through hole at different positions. This allows for adjustment of the axial fitting length of the two housings, thereby changing the overall axial dimension of the lock housing. Compared to traditional American standard door locks that require separate molds to manufacture lock housings with short and long backspreads, this structure allows a single lock housing to be adapted to multiple backspread specifications, significantly reducing mold-making and production costs, while also reducing the variety of items dealers need to stock, and significantly improving versatility.

[0027] In practical applications, the adjustable positioning element is a spring pin. When it is a spring pin, the adjustable positioning element includes at least a spring and a pin portion. The pin portion is used to extend into the corresponding first and second through holes. The pin portion can be cylindrical, spherical, etc., and this application does not make any special limitations.

[0028] In one embodiment of the present invention, the sidewall of the hollow columnar portion of the front housing has a connecting groove connecting two adjacent second through holes. The width of the connecting groove is smaller than the inner diameter of the first through hole and smaller than the inner diameter of the second through hole.

[0029] By setting a connecting groove that connects adjacent second through holes, the elastic pin can slide slightly along the connecting groove when switching gears, and the adjacent gear switching can be completed without completely exiting the hole, which greatly simplifies the back distance adjustment operation. At the same time, limiting the width of the connecting groove to be smaller than the inner diameter of each hole can prevent the elastic pin from accidentally coming out and avoid gear misalignment, ensuring accurate adjustment of each gear and structural stability, and further improving the reliability of dual back distance switching.

[0030] In practical applications, the adjustable positioning component can also be a stud screwed onto the rear housing mounting bracket.

[0031] The adjustable positioning component described in this application is a stud screwed onto the corresponding hollow cylindrical part, meaning the stud is screwed into the corresponding structure (rear housing mounting bracket) inside the hollow cylindrical part. By using a tool (such as a screwdriver), the stud is rotated, thereby adjusting its radial position relative to the rear housing. When the stud is no longer simultaneously inserted into the corresponding first and second through holes, the two hollow cylindrical parts can slide relative to each other to adjust their positions. After adjustment, by using a tool to rotate the stud, the stud simultaneously inserts into the corresponding first and second through holes, fixing the two housings in place after adjustment.

[0032] In one embodiment of the present invention, the sidewall of the hollow columnar portion of the rear housing also has two first positioning holes penetrating the hollow columnar portion, one of which is closer to the front housing. The sidewall of the hollow columnar portion of the front housing has a second positioning hole. The front housing and the rear housing have at least a first working position and a second working position. In the first working position, the area where the two hollow columnar portions overlap is minimal, and the second positioning hole is offset from the two first positioning holes. In the second working position, the area where the two hollow columnar portions overlap is greater than that in the first working position, and the second positioning hole is aligned with the first positioning hole closer to the front housing.

[0033] In practical applications, the preferred cylindrical lock body can be used for American standard locks. In the first station, the distance from the center of the square steel hole to the lock tongue panel, i.e., the backset, is 70mm, which is suitable for commercial mortise locks with a standard long backset. In the second station, the distance from the center of the square steel hole to the lock tongue panel, i.e., the backset, is 60mm, which is suitable for residential general short backsets.

[0034] In one embodiment of the present invention, the outer wall of the hollow columnar portion extending along its own axis is a cylindrical surface; The front housing has a notch at the end facing the rear housing, and the rear housing mounting bracket has an extension portion that extends into the corresponding notch.

[0035] The extension of the rear housing mounting bracket engages with the recess of the front housing to form a circumferential limit on the front and rear housings, preventing relative rotation of the housings, ensuring the overall structural strength and coaxiality of the lock housing, and enabling the lock body to maintain a regular assembly shape under different back-distance positions, thereby improving the structural stability and appearance consistency of the product.

[0036] In one embodiment of the present invention, the front housing further includes a mounting plate located at the end of the hollow columnar portion away from the rear housing, and the mounting plate is used to fix to the lock tongue panel of the lock body; The mounting plate has a recessed area, the latch panel covers the recessed area, and one end of the front housing mounting bracket is fitted into the recessed area.

[0037] This structure ensures that the front shell mounting bracket can be reliably installed.

[0038] In one embodiment of the present invention, the cylindrical lock body further includes a detection switch, the detection switch being disposed on the mounting plate, and the lock tongue panel having a clearance groove corresponding to the detection switch.

[0039] The detection switch can work with the lock plate mounted on the door frame to determine whether the door is open or closed.

[0040] In one embodiment of the present invention, when the flipping tongue is in the tongue extension working position, the working surface is parallel to the axis of the housing.

[0041] In one embodiment of the present invention, when the flipping tongue is in the tongue extension working position, the anti-disengagement part and the locking tongue panel are in surface fit.

[0042] This application includes two methods for locking and unlocking the flip-up latch.

[0043] Method 1: Electronic locking and unlocking. The drive motor drives the cam gear to rotate, and under the action of the first drive cam and the second elastic element, the locking block switches between the locking position and the unlocking position.

[0044] Method 2: Mechanical unlocking. An external square steel lever rotates the square steel connector, and the second drive protrusion and second elastic element of the connector switch the locking block between the locked and unlocked positions. This mechanical transmission method ensures that the locking block can still be switched to the unlocked position even in the event of a motor assembly failure, avoiding the risk of the door being unable to open due to a malfunction.

[0045] In this application, the axis of the front shell, the axis of the rear shell, and the axis of the hollow columnar part are all coincident.

[0046] The following is a detailed explanation based on the state of the columnar body after it is installed on the door and fits with the door frame latch: When the door is closed, the flip-up latch is in the extended working position, the anti-disengagement part cooperates with the latch panel, the locking block is kept in the locked working position under the action of the second elastic element, the cam gear is in the locked state, and the working surface of the latch cooperates with the door frame's snap plate to fix the door and door frame relatively.

[0047] When the door is opened electrically while closed, the motor assembly works, driving the cam gear to rotate. The first drive protrusion contacts and engages with the second extension rod, causing the locking block to rotate and switch from the locked position to the unlocked position. At this time, a person can push the door open. When the door is opened, the working surface of the latch is pressed, causing the flip latch to rotate and slide, moving into the lock housing. That is, the force that causes the flip latch to move into the lock housing is generated by the person pushing the door.

[0048] When the door is mechanically opened while closed, the square steel rotates, causing the square steel connector to rotate. The second drive protrusion contacts and engages with the second extension rod, causing the locking block to rotate and switch from the locked position to the unlocked position. At this time, a person can push the door open. When the door is opened, the working surface of the latch is pressed, causing the flip latch to rotate and slide, moving into the lock housing.

[0049] When the door is open, the flip-up latch is in the extended working position, the anti-disengagement part cooperates with the lock tongue panel, and the locking block is kept in the locked working position under the action of the second elastic element, with the cam gear in the locked state.

[0050] When closing the door while it is open, the inclined surface of the latch is pressed, and the flip latch slides into the lock housing along the axis of the housing. When the door is closed, the flip latch aligns with the hole in the door frame. Under the action of the first elastic element, the flip latch is pushed out by the guide block and extends into the hole in the door frame, thus closing the door.

[0051] The beneficial effects of this invention are as follows: Addressing the technical problems of traditional cylindrical lock bodies that can only be manually unlocked, lack electric control functions, and have a poor user experience, this invention innovatively integrates a motor assembly, a gear drive structure, a locking block limiting structure, and a flip-lock latch engagement structure within a small, hollow cylindrical lock body. The motor assembly drives the cam gear to rotate, thereby causing the locking block to switch its working position, achieving automatic electric switching between the locked and unlocked states of the flip-lock latch. This breaks the limitation of traditional American standard cylindrical locks relying entirely on manual mechanical operation, realizing intelligent electric unlocking functionality. Simultaneously, this application utilizes the limited internal space of the lock body to achieve an integrated electromechanical layout, realizing electric control without increasing the lock body's size, effectively improving the intelligence and ease of use of the cylindrical lock body, and significantly optimizing the user experience. Through differentiated limiting of the flip-lock latch's rotation and sliding freedom by the locking block, it also achieves door lock logic that prevents accidental opening when closing and adapts to pressure, resulting in higher lock body operational stability. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the cylindrical lock body when the flip-out latch is in the extended working position; Figure 2 This is a schematic diagram of another angle of the cylindrical lock body when the flip-out latch is in the extended working position; Figure 3 This is a schematic diagram of the housing structure after the cylindrical lock body has been removed; Figure 4 This is a schematic diagram of the front housing; Figure 5 yes Figure 3 A diagram showing the product after the front cover has been removed; Figure 6 This is a schematic diagram of the rear shell structure; Figure 7 This is a schematic diagram of the rear shell mounting bracket structure; Figure 8 This is a schematic diagram of the cylindrical lock body in the perspective view of the rear housing during the first working position; Figure 9 This is a schematic diagram of the cylindrical lock body in the perspective view of the rear housing during the second working position; Figure 10 This is a schematic diagram of the housing after the cylindrical lock body has been removed; Figure 11 This is a schematic diagram of the cylindrical lock body when the locking block is in the locked working position after the lock case is removed; Figure 12This is a schematic diagram of the cylindrical lock body at another angle when the locking block is in the locked working position after the lock case is removed; Figure 13 This is a schematic diagram of the cylindrical lock body when the first driving protrusion with a convex gear drives the locking block to the unlocking position after the lock case is removed; Figure 14 This is a schematic diagram of another angle of the cylindrical lock body when the first driving protrusion with a cam gear drives the locking block to the unlocking position after the lock case is removed; Figure 15 This is a schematic diagram of the cylindrical lock body when the second driving protrusion of the steel connecting piece behind the lock case drives the locking block into the unlocking position. Figure 16 This is a schematic diagram of the cylindrical lock body when the second driving protrusion of the steel connecting piece behind the lock case drives the locking block to the unlocking position. Figure 17 This is a schematic diagram of the cylindrical lock body after removing the lock case and a fixing plate; Figure 18 This is a schematic diagram showing the working surface of the flipping tongue being pressed and moved into the activity space when the locking block is in the unlocked working position. Figure 19 This is a schematic diagram of the flip-up tongue and guide block; Figure 20 This is a schematic diagram of the flipped tongue; Figure 21 This is a schematic diagram of the front and rear housing mounting brackets at the second workstation. Figure 22 This is a schematic diagram of the cylindrical lock body after the latch panel has been removed.

[0053] The labels for the attached figures are as follows: 1. Lock housing; 1a. Front housing; 11a. Opening; 1b. Rear housing; 11. Hollow cylindrical part; 111. First through hole; 112. Second through hole; 12. Insertion hole; 13. First positioning hole; 14. Second positioning hole; 15. Connecting groove; 16. Notch; 17. Mounting plate; 171. Recessed placement area; 2. Lock tongue panel; 21. Tongue hole; 22. Clearance groove; 3. Flipping latch; 31. Latch part; 311. Sloping surface; 312. Working surface; 313. Mating surface; 32. Anti-disengagement part; 321. Positioning slide groove; 41. Guide block; 411. Slider; 42. First elastic element; 43. Locking block; 431. First extension rod; 432. Middle rod; 433. Second 434. Extension rod; 44. Clearance space; 51. Second elastic element; 51. With convex gear; 511. Gear body; 5111. Notch; 5112. First drive protrusion; 5113. Positioning protrusion; 52. Motor assembly; 521. Drive motor; 522. Reducer; 523. Output gear; 61. Front housing mounting bracket; 611. Fixing plate; 6111. Strip hole; 612. Support plate; 613. Mobility space; 62. Rear housing mounting bracket; 621. Circuit board; 622. Signal switch; 6221. Trigger head; 623. Limiting part; 624. Extension part; 7. Square steel connector; 71. Square steel hole; 72. Second drive protrusion; 8. Adjustable positioning element; 9. Detection switch. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0055] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] The present invention will now be described in detail with reference to the accompanying drawings.

[0058] like Figures 1 to 22 As shown, a cylindrical lock body is disclosed. The cylindrical lock body includes: See Figure 4 and 22 Lock case 1 has a hollow cylindrical shell, and one end of lock case 1 has an opening 11a; See Figure 1 The latch panel 2 is fixed at the opening of the lock housing 1, and the latch panel 2 has a tongue hole 21 corresponding to the opening 11a of the lock housing 1. See Figure 1 and Figure 5 The flip-up tongue 3 is movably set in the lock housing 1. The flip-up tongue 3 has a tongue portion 31 and an anti-disengagement portion 32. The tongue portion 31 has a slope 311 and a working surface 312. The tongue portion 31 can pass through the tongue hole 21 of the lock tongue panel 2. The anti-disengagement portion 32 is used to cooperate with the lock tongue panel 2 to prevent the flip-up tongue 3 from completely disengaging from the lock housing 1. When the anti-disengagement portion 32 cooperates with the lock tongue panel 2, the flip-up tongue 3 is in the tongue extension working position. The flip-up tongue 3 has a mating surface 313 and a positioning groove 321. See Figure 5 , Figure 13 and Figure 19 Guide block 41 is slidably disposed on lock housing 1, and guide block 41 is engaged with mating surface 313 of flip tongue 3; See Figure 5 and Figure 17 The first elastic element 42 is disposed in the lock housing 1 and cooperates with the guide block 41 to give the guide block 41 a tendency to push the flipping tongue 3 to move outward from the lock housing 1. See Figure 5 , Figures 11-14The locking block 43 is slidably or rotatably mounted on the lock housing 1. One end of the locking block 43 has a first extension rod 431, and the other end has a second extension rod 433. The first extension rod 431 engages with the positioning groove 321 of the flip-hinged latch 3. The locking block 43 has a locking position and an unlocking position. When the locking block 43 is in the locking position, the first extension rod 431 is engaged in the positioning groove 321, and the flip-hinged latch 3 cannot rotate, but can only slide along the axis of the housing. When the locking block 43 is in the unlocking position, the first extension rod 431 disengages. The positioning groove 321 allows the flipping tongue 3 to rotate and slide. When the locking block 43 is in the locked position and the flipping tongue 3 is in the tongue extension position, the working surface 312 of the tongue part 31 is pressed, and the flipping tongue 3 remains stationary. When the inclined surface 311 of the tongue part 31 is pressed, the flipping tongue 3 will slide into the lock housing 1 along the axial direction of the housing. When the locking block 43 is in the unlocked position and the flipping tongue 3 is in the tongue extension position, the working surface 312 of the tongue part 31 is pressed, and the flipping tongue 3 will rotate and slide, moving into the lock housing 1. See Figure 5 and Figure 13 The second elastic element 44 is provided in the lock housing 1 and cooperates with the locking block 43 to give the locking block 43 a tendency to switch to the locking position. See Figure 7 , 13 And 14, with a cam gear 51, rotatably mounted on the lock housing 1, the cam gear 51 has a first drive protrusion 5112, the cam gear 51 is used to cooperate with the second extension rod 433 through the first drive protrusion 5112 to drive the locking block 43 to move, so that the locking block 43 can switch to the unlocking working position; See Figure 7 The motor assembly 52 is located in the lock housing 1 and is used to drive the rotation of the gear 51.

[0059] Addressing the technical problems of traditional cylindrical lock bodies that can only be manually unlocked, lack electric control functions, and have a poor user experience, this invention innovatively integrates a motor assembly 52, a gear drive structure, a locking block 43 limiting structure, and a flip-lock latch 3 engagement structure within a small, hollow cylindrical lock body. The motor assembly 52 drives the convex gear 51 to rotate, thereby causing the locking block 43 to switch its working position, achieving automatic electric switching between the locked and unlocked states of the flip-lock latch 3. This breaks the limitation of traditional American standard cylindrical locks that rely entirely on manual mechanical operation, realizing intelligent electric unlocking functionality. Simultaneously, this application utilizes the limited internal space of the lock body to achieve an integrated electromechanical layout, realizing electric control without increasing the lock body's size, effectively improving the intelligence and ease of use of the cylindrical lock body, and significantly optimizing the user experience. Through the differentiated limiting of the rotation and sliding freedom of the flip-lock latch 3 by the locking block 43, it also achieves door lock logic that prevents accidental opening when closing and adapts to pressure, resulting in higher lock body operational stability.

[0060] Although the lock housing 1 and the lock tongue panel 2 are described separately in this application, it still includes the case that the lock tongue panel 2 can be a part of the structure of the lock housing 1, that is, the lock tongue panel 2 and part of the structure of the lock housing 1 are integrally formed.

[0061] When the latch panel 2 is an independent part, the latch panel 2 mentioned in this application is fixed at the opening of the housing, which means that it can be fixed in various ways, such as fastener connection, snap-fit, bonding, welding, etc.

[0062] In practical applications, the various elastic elements of this application can be selected as needed, and can be in various forms such as compression springs, torsion springs, and spring sheets.

[0063] In one embodiment, such as Figure 5 and 17 As shown, the locking block 43 is rotatably disposed inside the lock housing 1; The first extension rod 431 and the second extension rod 433 are arranged along the length of the housing. The locking block 43 also includes an intermediate rod 432. The locking block 43 is Z-shaped. The first extension rod 431, the intermediate rod 432 and the second extension rod 433 are connected in sequence. The rotation axis of the locking block 43 is located at one end of the intermediate rod 432 adjacent to the first extension rod 431.

[0064] Preferably, in this application, the positioning groove 321 is located on one side of the oblique tongue 31, and the first extension rod 431 and the positioning groove 321 are arranged on the same side.

[0065] Addressing the technical challenges of traditional cylindrical lock bodies that can only be manually unlocked, are difficult to upgrade to intelligent systems, and have limited internal space, making it difficult to arrange electric drive structures, this application designs the locking block 43 as a Z-shaped integral structure, with its rotation axis eccentrically positioned at the end of the intermediate rod 432 near the first extension rod 431. The bending structure of the Z-shaped rod creates a natural clearance space 434, effectively avoiding spatial interference within the confined lock body and reserving ample assembly space for core electric components such as the convex gear 51 and motor assembly 52. ​​This effectively solves the industry difficulty of integrating electric unlocking structures into compact cylindrical lock bodies. Simultaneously, the eccentric rotation layout effectively amplifies the drive stroke, allowing even small rotations of the gear to reliably drive the locking block 43 to switch between locking and unlocking positions, resulting in sensitive transmission response and smooth, stable operation.

[0066] like Figure 5 , 6 As shown in 11 to 18, in one embodiment, a front housing mounting bracket 61 and a rear housing mounting bracket 62 are fixed inside the lock housing 1. The front housing mounting bracket 61 is adjacent to the lock tongue panel 2, and the rear housing mounting bracket 62 is away from the lock tongue panel 2. The guide block 41 is slidably mounted on the front housing mounting bracket 61, and the flip tongue 3 is movably mounted on the front housing mounting bracket 61. The first elastic element 42 is disposed between the front housing mounting bracket 61 and the guide block 41; The locking block 43 is rotatably mounted on the front housing mounting bracket 61 or the rear housing mounting bracket 62; The cam gear 51 is rotatably mounted on the rear housing mounting bracket 62, and the motor assembly 52 is mounted on the rear housing mounting bracket 62.

[0067] In this application, when the lock housing 1 is a non-adjustable lock housing 1, the front housing mounting bracket 61 and the rear housing mounting bracket 62 can be independent of each other or connected to each other to form an integral mounting bracket.

[0068] like Figure 5 and Figure 17 As shown, in one embodiment, the front housing mounting bracket 61 has two spaced-apart fixing plates 611; the front housing mounting bracket 61 also has a support plate 612 located at the end of the two fixing plates 611 away from the latch panel 2, the support plate 612 and the two fixing plates 611 form an active space 613 for the flip-up latch 3 and the guide block 41 to move. The fixing plate 611 has a strip hole 6111 arranged along the length direction of the lock case 1, the guide block 41 is arranged between the two fixing plates 611, and the guide block 41 has a slider 411 extending into the strip hole 6111; The first elastic element 42 is a compression spring disposed between the support plate 612 and the guide block 41.

[0069] The double fixing plates 611, together with the support plate 612, form a semi-closed or closed movable cavity, and the guide slider 411 and the strip hole 6111 enable the guide block 41 to slide precisely. The front shell mounting bracket 61 can reliably limit the flip-up tongue 3 and the guide block 41, ensuring that the flip-up tongue 3 can slide linearly or flip.

[0070] like Figure 7 , 11 As shown in 1, 12, 13 and 14, in one embodiment, the motor assembly 52 includes a drive motor 521 connected to a reducer 522 and an output gear 523 fixed on the output shaft of the reducer 522, the output gear 523 meshing with a convex gear 51. A circuit board 621 and a signal switch 622 are mounted on the rear housing mounting bracket 62. The circuit board 621 is electrically connected to the drive motor 521 and the signal switch 622. The signal switch 622 has a trigger head 6221 that can rotate bidirectionally. The convex gear 51 has a notch 5111, and the rear housing mounting bracket 62 has a limiting part 623 that extends into the notch 5111; The cam gear 51 also has a positioning cam 5113, and the trigger head 6221 is located in the space between the positioning cam 5113 and the first drive cam 5112; The cam gear 51 has a locked state and an unlocked state; When the cam 51 is in the locked state, the limiting part 623 abuts against one end of the notch 5111, the first driving cam 5112 moves away from the second extension rod 433, and the first driving cam 5112 contacts the trigger head 6221, causing the trigger head 6221 to rotate in the first direction. When the cam 51 is in the unlocked state, the limiting part 623 abuts against the other end of the notch 5111, the first driving cam 5112 contacts and engages with the second extension rod 433, driving the locking block 43 to rotate, so that the locking block 43 switches to the unlocked working position, and the positioning cam 5113 contacts the trigger head 6221, so that the trigger head 6221 rotates in the second direction.

[0071] The signal switch 622 of this application generates different signals when the trigger head 6221 rotates in different directions. The rotation limit position of the cam gear 51 is limited by the contact engagement between the limiting part 623 and the notch 5111.

[0072] The motor reduction drive structure, gear limit structure, and bidirectional signal switch 622 enable precise driving, travel limit, and status detection for the electric unlocking of the cylindrical lock body. The limit part 623, in conjunction with the notch 5111, restricts the rotational travel of the convex gear 51, preventing over-driving jamming and structural damage. The bidirectional trigger signal switch 622 accurately identifies whether the convex gear 51 is in the locked or unlocked state, providing precise status feedback to the intelligent lock control system.

[0073] like Figure 7 , 11 As shown in 1, 12, 13 and 14, in one embodiment, the convex gear 51 includes a gear body 511, a first driving convex part 5112 and a positioning convex part 5113 are both located on the periphery of the gear body 511 and protrude along the axial direction of the gear body 511; the second extension rod 433 is offset from the gear body 511 in the circumferential direction of the gear body 511.

[0074] The first drive protrusion 5112 is located around the gear body 511 and protrudes along the axial direction of the gear body 511. The second extension rod 433 is offset from the gear body 511 in the circumferential direction of the gear body 511. This arrangement further reduces the space occupied by the electric drive structure, achieving high-density integration in a narrow cylindrical space.

[0075] like Figure 1 and 7As shown, in one embodiment, the cylindrical lock body further includes a square steel connector 7 rotatably mounted on a convex gear 51 and / or a rear housing mounting bracket 62. The square steel connector 7 is used for an external square steel to pass through. The square steel connector 7 has a square steel hole 71 that mates with the external square steel. The lock housing 1 has an insertion hole 12 corresponding to the square steel hole 71. like Figure 17 and 18 As shown, the square steel connector 7 has one or two second driving protrusions 72; the second driving protrusions 72 are used to contact and cooperate with the second extension rod 433 when the square steel connector 7 is driven to rotate by the external square steel, thereby driving the locking block 43 to rotate and switching the locking block 43 to the unlocking position; when the square steel connector 7 has two second driving protrusions 72, the locking block 43 can be switched to the unlocking position when the square steel connector 7 rotates in any direction.

[0076] The cylindrical lock body of this application retains the traditional manual square steel unlocking function. This allows the lock body to have both electric intelligent unlocking and mechanical manual emergency unlocking modes. In normal scenarios, electric unlocking can improve the user experience, while in special scenarios such as motor failure or power outage, manual emergency unlocking can be performed to avoid the problem of failure and jamming.

[0077] The term "square steel" in this application is used in a general sense and is not limited to steel with a rectangular cross-section.

[0078] In one embodiment, the lock case 1 has only one housing.

[0079] like Figure 1 , 3 As shown in Figures 4, 8, 9, and 10, in one embodiment, the lock housing 1 has two housings, namely a front housing 1a and a rear housing 1b, both housings having a hollow columnar portion 11. The lock housing 1 also has an adjustable positioning element 8 (see Figure 1). Figure 8 , 9 (and 11, other figures omitted, not shown), the hollow columnar portion 11 of the rear housing 1b slides onto the hollow columnar portion 11 of the front housing 1a; The front housing mounting bracket 61 is installed in the hollow columnar portion 11 of the front housing 1a, and the rear housing mounting bracket 62 is installed in the hollow columnar portion 11 of the rear housing 1b. Adjustable positioning component 8 is mounted on rear housing mounting bracket 62; the side wall of the hollow columnar portion 11 of the rear housing 1b has a first through hole 111, and the side wall of the hollow columnar portion 11 of the front housing 1a has a plurality of second through holes 112 spaced apart along the axial direction of the hollow columnar portion 11. Adjustable positioning component 8 is used to extend into the corresponding first through hole 111 and second through hole 112 to fix the two hollow columnar portions 11 relative to each other. The middle rod 432 of the locking block 43 is rotatably mounted on the front shell mounting bracket 61. The middle rod 432 and the second extension rod 433 form a clearance space 434 for the rear shell mounting bracket 62 to move and adjust.

[0080] When converting a traditional American standard door lock to an electric drive, two different sizes of lock housing 1 need to be designed, which is costly and inconvenient for distributors to stock. This application addresses this by using a sliding fit between the hollow cylindrical portions 11 of the two housings, and by utilizing an adjustable positioning element 8 that selectively extends into different positions of the second through hole 112. This allows for adjustment of the axial fitting length of the two housings, thereby changing the overall axial dimension of the lock housing 1. Compared to traditional American standard door locks that require separate molds for short and long backspread lock housings 1, this structure allows a single lock housing 1 to accommodate multiple backspread specifications, significantly reducing mold-making and production costs, while also reducing the variety of items distributors need to stock, thus significantly improving versatility.

[0081] In other embodiments, the hollow columnar portion of the front housing may also be fitted over the hollow columnar portion of the rear housing.

[0082] In other embodiments, the adjustable positioning member can also be disposed in the hollow columnar portion of the front housing, that is, it can be mounted on the front housing mounting bracket.

[0083] like Figure 8 , 9 As shown in Figure 11, the adjustable positioning element 8 is a spring pin. When it is a spring pin, the adjustable positioning element 8 includes at least a spring and a pin portion, which is used to extend into the corresponding first through hole 111 and second through hole 112. The pin portion can be cylindrical, spherical, etc., and this application does not make any special limitation.

[0084] like Figure 3 , 8 As shown in Figures 9 and 10, in one embodiment, the sidewall of the hollow columnar portion 11 of the front housing 1a has a connecting groove 15 connecting two adjacent second through holes 112. The width of the connecting groove 15 is smaller than the inner diameter of the first through hole 111 and smaller than the inner diameter of the second through hole 112. By providing the connecting groove 15 connecting adjacent second through holes 112, the elastic pin can slide slightly along the connecting groove 15 when shifting gears, and the shifting of adjacent gears can be completed without completely withdrawing from the hole, greatly simplifying the back distance adjustment operation; at the same time, limiting the width of the connecting groove 15 to be smaller than the inner diameter of each hole can prevent the elastic pin from accidentally coming out and avoid gear misalignment, ensuring accurate adjustment of each gear and structural stability, and further improving the reliability of dual back distance switching.

[0085] In practical applications, the adjustable positioning element 8 can also be a stud screwed onto the rear housing mounting bracket 62. The adjustable positioning element 8 mentioned in this application refers to a stud screwed onto the corresponding hollow cylindrical portion 11, meaning the stud is screwed into the corresponding structure (rear housing mounting bracket 62) inside the corresponding hollow cylindrical portion 11. By using a tool (such as a screwdriver), the stud can be rotated, thereby adjusting the radial position of the stud relative to the rear housing 1b. When the stud no longer simultaneously extends into the corresponding first through hole 111 and second through hole 112, the two hollow cylindrical portions 11 can slide relative to each other to adjust their positions. After adjustment, by using a tool to rotate the stud, causing it to simultaneously extend into the corresponding first through hole 111 and second through hole 112, the adjusted two housings are fixed in place.

[0086] like Figure 3 , 4 As shown in 6, 8 and 9, in one embodiment, the sidewall of the hollow columnar portion 11 of the rear housing 1b also has two first positioning holes 13 penetrating the hollow columnar portion 11, one of which is closer to the front housing 1a. The side wall of the hollow columnar portion 11 of the front housing 1a has a second positioning hole 14. The front housing 1a and the rear housing 1b have at least a first working position and a second working position. In the first working position, the area where the two hollow columnar portions 11 are interlocked is minimal, and the second positioning hole 14 is offset from the two first positioning holes 13. In the second working position, the area where the two hollow columnar portions 11 are interlocked is greater than that in the first working position, and the second positioning hole 14 is aligned with the first positioning hole 13 that is closer to the front housing 1a.

[0087] In practical applications, the preferred cylindrical lock body can be used for American standard locks. In the first station, the distance between the center of the square steel hole 71 and the lock tongue panel 2, i.e., the backset, is 70mm, which is suitable for commercial mortise locks with a standard long backset. In the second station, the distance between the center of the square steel hole 71 and the lock tongue panel 2, i.e., the backset, is 60mm, which is suitable for residential general short backset.

[0088] In one embodiment, the outer wall of the hollow columnar portion 11 extending along its own axis is a cylindrical surface; like Figure 8 and 9 As shown, the front housing 1a has a notch 16 at the end facing the rear housing 1b, and the rear housing mounting bracket 62 has an extension portion 624 that extends into the corresponding notch 16.

[0089] The extension 624 of the rear housing mounting bracket 62 engages with the recess 16 of the front housing 1a to form a circumferential limit on the front and rear housings 1b, preventing relative rotation of the housings, ensuring the overall structural strength and coaxiality of the lock housing 1, and enabling the lock body to maintain a regular assembly shape under different back distance positions, thereby improving the structural stability and appearance consistency of the product.

[0090] like Figure 1 , 2 As shown in Figure 22, in one embodiment, the front housing 1a further has a mounting plate 17, which is located at the end of the hollow columnar portion 11 away from the rear housing 1b, and the mounting plate 17 is used to fix to the latch panel 2 of the lock body. Mounting plate 17 has a recessed area 171, latch panel 2 covers the recessed area 171, and one end of front housing mounting bracket 61 is fitted into the recessed area 171.

[0091] This structure ensures that the front shell mounting bracket 61 can be reliably installed.

[0092] like Figure 1 and 22 As shown, in one embodiment, the cylindrical lock body also includes a detection switch 9, which is disposed on the mounting plate 17, and the lock tongue panel 2 has a clearance groove 22 corresponding to the detection switch 9.

[0093] The detection switch 9 can cooperate with the lock plate installed on the door frame to determine whether the door is in the open or closed state.

[0094] In one embodiment, when the flipping tongue 3 is in the tongue extension working position, the working surface 312 is parallel to the axis of the housing.

[0095] In one embodiment, when the flip-up tongue 3 is in the tongue extension working position, the anti-detachment part 32 and the locking tongue panel 2 are in surface fit.

[0096] In one embodiment, the cylindrical lock body of this application further includes a lock housing 1 adjustment structure, which may include an adjustable positioning member 8, a front housing 1a, and a rear housing 1b.

[0097] In the accompanying drawings of this application, the hollow columnar portion 11 of the rear housing 1b is fitted over the hollow columnar portion 11 of the front housing 1a. In actual use, the hollow columnar portion 11 of the rear housing 1b can also be fitted over the hollow columnar portion 11 of the front housing 1a.

[0098] In the accompanying drawings of this application, the adjustable positioning member 8 is mounted on the relevant structure (rear housing mounting bracket 62) of the hollow columnar portion 11 of the rear housing 1b. In actual use, it can also be mounted on the relevant structure (front housing mounting bracket 61) of the hollow columnar portion 11 of the front housing 1a. In this case, the positions of the first through hole 111 and the second through hole 112 are interchanged.

[0099] The locking and unlocking of the flip-out tongue 3 in this application includes two methods.

[0100] Method 1: Electronic locking and unlocking. The drive motor 521 drives the cam gear 51 to rotate. Under the action of the first drive cam 5112 and the second elastic element 44, the locking block 43 switches between the locking position and the unlocking position.

[0101] Method 2: Mechanical unlocking. An external square steel lever rotates the square steel connector 7. Under the action of the second drive protrusion 72 and the second elastic element 44 of the square steel connector 7, the locking block 43 switches between the locked and unlocked positions. This mechanical transmission method ensures that the locking block 43 can still be switched to the unlocked position even if the motor assembly 52 malfunctions, avoiding the risk of the door being unable to open due to a faulty motor assembly 52.

[0102] In this application, the axis of the front housing 1a, the axis of the rear housing 1b, and the axis of the hollow columnar portion 11 are all coincident.

[0103] The following is a detailed explanation based on the state of the columnar body after it is installed on the door and fits with the door frame latch: With the door closed, see Figure 11 and 12 When the flip-up tongue 3 is in the tongue extension working position, the anti-disengagement part 32 cooperates with the lock tongue panel 2, the locking block 43 is kept in the locked working position under the action of the second elastic element 44, the cam gear 51 is in the locked state, and the working surface 312 of the tongue part 31 cooperates with the door frame's snap plate to fix the door and door frame relatively.

[0104] When opening the electric door while it is closed, see Figure 13 and 14 When the motor assembly 52 operates, it drives the cam gear 51 to rotate. The first drive protrusion 5112 contacts and engages with the second extension rod 433, causing the locking block 43 to rotate, switching the locking block 43 from the locked position to the unlocked position. At this time, a person can push the door open. When the door is opened, the working surface 312 of the latch 31 is pressed, causing the flip latch 3 to rotate and slide, moving into the lock housing 1. Figure 18 The force that causes the flipping latch 3 to move into the lock housing 1 is generated by a person pushing the door.

[0105] When mechanically opening the door while it is closed, see Figure 15 and 16 The square steel rotates, causing the square steel connector 7 to rotate. The second drive protrusion 72 contacts and engages with the second extension rod 433, causing the locking block 43 to rotate, switching the locking block 43 from the locked position to the unlocked position. At this time, a person can push the door open. When the door is open, see Figure 18When the working surface 312 of the oblique tongue 31 is pressed, the flipping oblique tongue 3 will rotate and slide, moving into the lock housing 1.

[0106] When the door is open, the flip-up tongue 3 is in the tongue extension working position, the anti-disengagement part 32 cooperates with the lock tongue panel 2, the locking block 43 is kept in the locked working position under the action of the second elastic element 44, and the cam gear 51 is in the locked state.

[0107] When closing the door while it is open, the inclined surface 311 of the tongue 31 is pressed, and the flip tongue 3 slides into the lock housing 1 along the axis of the housing. When the door is closed, the flip tongue 3 corresponds to the hole in the door frame. Under the action of the first elastic element 42, the flip tongue 3 is pushed out by the guide block 41 and extends into the hole in the door frame to close the door.

[0108] The above description is merely a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A cylindrical lock body, characterized in that, include: A lock case, having a hollow cylindrical shell, with an opening at one end; A latch panel is fixed at the opening of the lock housing, and the latch panel has a tongue hole corresponding to the opening of the lock housing; A flip-up latch is movably mounted on the lock housing. The flip-up latch has a latch portion and an anti-disengagement portion. The latch portion has an inclined surface and a working surface. The latch portion can pass through the tongue hole of the lock tongue panel. The anti-disengagement portion is used to cooperate with the lock tongue panel to prevent the flip-up latch from completely disengaging from the lock housing. When the anti-disengagement portion cooperates with the lock tongue panel, the flip-up latch is in the latch extension working position. The flip-up latch has a mating surface and a positioning groove. A guide block is slidably disposed in the lock housing, and the guide block engages with the mating surface of the flip-up tongue; The first elastic element is disposed in the lock housing and cooperates with the guide block to give the guide block a tendency to push the flipping latch to move outward of the lock housing; A locking block is slidably or rotatably mounted on a lock housing. One end of the locking block has a first extension rod, and the other end has a second extension rod. The first extension rod engages with the positioning groove of the flip-hook. The locking block has a locking position and an unlocking position. When the locking block is in the locking position, the first extension rod is embedded in the positioning groove, and the flip-hook cannot rotate but can only slide along the axis of the housing. When the locking block is in the unlocking position, the first extension rod disengages from the positioning groove, and the flip-hook can rotate and slide. When the locking block is in the locking position and the flip-hook is in the extended position, the working surface of the flip-hook is pressed, and the flip-hook remains stationary. The inclined surface of the flip-hook is pressed, and the flip-hook slides into the lock housing along the axis of the housing. When the locking block is in the unlocking position and the flip-hook is in the extended position, the working surface of the flip-hook is pressed, and the flip-hook rotates and slides, moving into the lock housing. The second elastic element is disposed in the lock housing and cooperates with the locking block to give the locking block a tendency to switch to the locking position. A cam gear is rotatably mounted on the lock housing. The cam gear has a first driving protrusion. The cam gear is used to cooperate with the second extension rod through the first driving protrusion to drive the locking block to move, so that the locking block can switch to the unlocking position. A motor assembly, disposed in the lock housing, is used to drive the geared component to rotate.

2. The cylindrical lock body as described in claim 1, characterized in that, The locking block is rotatably mounted inside the lock housing; The first extension rod and the second extension rod are arranged along the length direction of the housing. The locking block also includes a middle rod. The locking block is Z-shaped. The first extension rod, the middle rod and the second extension rod are connected in sequence. The rotation axis of the locking block is located at one end of the intermediate rod adjacent to the first extension rod.

3. The cylindrical lock body as described in claim 2, characterized in that, It also includes a front housing mounting bracket and a rear housing mounting bracket fixed inside the lock housing, wherein the front housing mounting bracket is adjacent to the lock tongue panel and the rear housing mounting bracket is away from the lock tongue panel; The guide block is slidably mounted on the front housing mounting bracket, and the flipping tongue is movably disposed on the front housing mounting bracket; The first elastic element is disposed between the front housing mounting bracket and the guide block; The locking block is rotatably mounted on the front shell mounting bracket or the rear shell mounting bracket; The cam gear is rotatably mounted on the rear housing mounting bracket, and the motor assembly is mounted on the rear housing mounting bracket.

4. The cylindrical lock body as described in claim 3, characterized in that, The front housing mounting bracket has two fixed plates spaced apart; the front housing mounting bracket also has a support plate located at the end of the two fixed plates away from the latch panel, and the support plate and the two fixed plates form an active space for the flip latch and guide block to move. The fixing plate has a strip-shaped hole arranged along the length of the lock case, the guide block is arranged between the two fixing plates, and the guide block has a slider that extends into the strip-shaped hole; The first elastic element is a compression spring disposed between the support plate and the guide block.

5. The cylindrical lock body as described in claim 3, characterized in that, The motor assembly includes a drive motor connected to a reducer and an output gear fixed on the output shaft of the reducer, the output gear meshing with the convex gear; A circuit board and a signal switch are mounted on the rear housing mounting bracket. The circuit board is electrically connected to the drive motor and the signal switch. The signal switch has a trigger head that can rotate bidirectionally. The convex gear has a notch, and the rear housing mounting bracket has a limiting portion that extends into the notch; The convex gear also has a positioning convex part, and the trigger head is located in the space between the positioning convex part and the first driving convex part; The gear-equipped device has a locked state and an unlocked state. When the cam gear is in the locked state, the limiting part abuts against one end of the notch, the first driving protrusion moves away from the second extension rod, and the first driving protrusion contacts the trigger head, causing the trigger head to rotate in the first direction; When the cam gear is in the unlocked state, the limiting part abuts against the other end of the notch, the first driving protrusion contacts and engages with the second extension rod, driving the locking block to rotate, so that the locking block switches to the unlocked working position, and the positioning protrusion contacts the trigger head, so that the trigger head rotates in the second direction.

6. The cylindrical lock body as described in claim 3, characterized in that, The convex gear includes a gear body, the first driving convex part and the positioning convex part are both located on the periphery of the gear body and protrude along the axial direction of the gear body; the second extension rod is offset from the gear body in the circumferential direction of the gear body. The cylindrical lock body also includes a square steel connector rotatably mounted on the mounting bracket with the convex gear and / or the rear housing. The square steel connector is used for an external square steel to pass through. The square steel connector has a square steel hole that mates with the external square steel. The lock housing has an insertion hole corresponding to the square steel hole. The square steel connector has one or two second driving protrusions; the second driving protrusion is used to contact and cooperate with the second extension rod when the square steel connector is driven to rotate by the external square steel, thereby driving the locking block to rotate and switching the locking block to the unlocking position; when the square steel connector has two second driving protrusions, the locking block can be switched to the unlocking position when the square steel connector rotates in any direction.

7. The cylindrical lock body as described in claim 3, characterized in that, The lock housing has two housings, namely a front housing and a rear housing, both housings having a hollow columnar portion. The lock housing also has an adjustable positioning component, and the hollow columnar portion of the rear housing slides onto the hollow columnar portion of the front housing. The front shell mounting bracket is installed in the hollow columnar part of the front shell, and the rear shell mounting bracket is installed in the hollow columnar part of the rear shell. The adjustable positioning component is mounted on the rear shell mounting bracket; the side wall of the hollow columnar part of the rear shell has a first through hole, and the side wall of the hollow columnar part of the front shell has a plurality of second through holes spaced apart along the axial direction of the hollow columnar part. The adjustable positioning component is used to extend into the corresponding first through hole and second through hole to fix the two hollow columnar parts relative to each other. The intermediate rod of the locking block is rotatably mounted on the front housing mounting bracket, and the intermediate rod and the second extension rod form a clearance space for the rear housing mounting bracket to move and adjust.

8. The cylindrical lock body as described in claim 7, characterized in that, The sidewall of the hollow columnar portion of the rear housing also has two first positioning holes penetrating the hollow columnar portion, one of which is closer to the front housing. The sidewall of the hollow columnar portion of the front housing has a second positioning hole. The front housing and the rear housing have at least a first working position and a second working position. In the first working position, the area where the two hollow columnar portions overlap is minimal, and the second positioning hole is offset from the two first positioning holes. In the second working position, the area where the two hollow columnar portions overlap is greater than that in the first working position, and the second positioning hole is aligned with the first positioning hole closer to the front housing.

9. The cylindrical lock body as described in claim 7, characterized in that, The outer wall of the hollow columnar part extending along its own axis is a cylindrical surface; The front housing has a notch at the end facing the rear housing, and the rear housing mounting bracket has an extension portion that extends into the corresponding notch.

10. The cylindrical lock body as described in claim 7, characterized in that, The front housing also has a mounting plate located at the end of the hollow columnar portion away from the rear housing, and the mounting plate is used to fix it to the bolt panel of the lock body. The mounting plate has a recessed area, the latch panel covers the recessed area, and one end of the front housing mounting bracket is fitted into the recessed area; The cylindrical lock body also includes a detection switch, which is disposed on the mounting plate, and the bolt panel has a clearance groove corresponding to the detection switch; When the flipping tongue is in the tongue extension working position, the working surface is parallel to the axis of the housing.

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