Modularized lock cylinder and lock

Abstract

The invention provides a modularized lock cylinder and a lock, and belongs to the technical field of lock accessories, the modularized lock cylinder comprises an extension module, a lock head module, a lock shell module and a lock seat module, the extension module is arranged between the lock head module and the lock shell module, one surface of the extension module is clamped with the surface of the lock head module in a matched mode, and the other surface of the extension module is clamped with the lock seat module. The other face of the extension module is clamped to the surface of the lock shell module in a matched mode, a connecting shaft is arranged at the bottom end of the lock head module, a locking structure is arranged at one end of the lock seat module, the extension module comprises extension seats, connecting mechanisms are arranged in inner cavities of the three extension seats, and the three extension seats are connected through the connecting mechanisms; the lock head module and the lock shell module are connected through a connecting mechanism, so that the assembly work of parts in the lock cylinder by a user is shortened, the assembly difficulty of the lock cylinder by the user is simplified, the phenomenon that the parts are scattered and fall off is avoided, and convenience is provided for the addition and refitting work of accessories of the lock cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of lock accessories, and in particular to a modular lock core and a lock. Background Art

[0002] The lock core is the core component of the lock, responsible for controlling the opening of the lock. It adopts multiple anti-theft technologies, including a variety of special-shaped anti-pulling pins and precision number pin structures, and has a high degree of security against technical opening. The lock core can compile billions of key numbers through multiple combinations of special-shaped pins to achieve zero mutual opening in different regions. In addition, the lock core also adds a lateral inward pressure side column latch device to enhance the ability to prevent violent twisting.

[0003] The existing lock core generally includes a lock head, a connecting shaft, a lock head shell, a lock seat and other parts. The lock core needs to be installed on the anti-theft door for use. The thickness of the existing anti-theft doors varies. When the length of the lock core is not enough, the lock core needs to be disassembled and then assembled after adding an extension piece. Since the parts are too scattered after the lock core is disassembled, the user needs to spend more time to assemble the parts in the lock core, which increases the difficulty of assembling the lock core for the user. At the same time, there are many parts and it is easy for parts to fall off, which brings inconvenience to the addition and modification of the lock core accessories.

[0004] In view of the above technical problems, a lock core provided by announcement number CN213539994U includes a lock shell, a lock core, a locking device and a dial sleeve. The lock core is provided with a keyhole, and a toggle piece is provided at the rear end of the lock core. The toggle piece extends from the rear end of the lock core. A clamping part matching the toggle piece and a cavity for the toggle piece to rotate idly are provided in the dial sleeve. When the lock core rotates, the toggle piece rotates a certain angle in the cavity and contacts the clamping part, driving the dial sleeve to rotate. The lock core of this structure is not easy to get stuck or rotate idly, and can effectively prevent foreign matter from entering the deep part of the lock core. It has a simple structure, is easy to process, and has a low production cost.

[0005] According to the lock core introduced above, when the length of the lock core is not enough, the lock core needs to be disassembled and then assembled after adding the extension piece. Since the parts are too scattered after the lock core is disassembled, the user needs to spend more time to assemble the parts in the lock core, which increases the difficulty of assembling the lock core for the user. At the same time, there are many parts and parts are prone to falling, which brings inconvenience to the addition and modification of the lock core accessories. Therefore, we need to propose a modular lock core and lock. Summary of the invention

[0006] The purpose of the present invention is to provide a modular lock core and lock. Through the cooperation of an extension module, a lock head module, a lock shell module and a lock seat module, the internal structure of the lock core is modularized to avoid the scattering of parts after the lock core is disassembled. Through the cooperation of the extension seat and the connection mechanism, the lock head module and the lock shell module can be quickly connected and assembled. Through the setting of three groups of extension seats, extension seats of different thicknesses can be added according to the thickness of the anti-theft door, and the three groups of extension seats can be arbitrarily combined and disassembled. The lock core is extended in cooperation, thereby shortening the user's assembly work of the parts in the lock core, simplifying the difficulty of the user's assembly of the lock core, avoiding the phenomenon of scattered parts, and providing convenience for the addition and modification of the accessories of the lock core, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a modular lock core, comprising an extension module, a lock head module, a lock shell module and a lock seat module, the extension module being arranged between the lock head module and the lock shell module, one side of the extension module being engaged with and snap-fitted to the surface of the lock head module, the other side of the extension module being engaged with and snap-fitted to the surface of the lock shell module, one end of the lock seat module being provided with a locking structure for facilitating locking with the lock shell module, the extension module comprising an extension seat, three groups of the extension seats being provided, the surfaces of the three groups of the extension seats being provided with through holes, the inner cavities of the three groups of the extension seats being provided with connecting mechanisms, the three groups of the extension seats being connected by the connecting mechanisms, and the lock head module and the lock shell module being connected by the connecting mechanism.

[0008] Exemplarily, the connecting mechanism includes a support tube, which is arranged in the inner cavity of the extension seat, and a clamping block is fixedly connected to one end of the support tube, and the surface of the clamping block is engaged with the lock head module. A first clamping groove is opened at the other end of the support tube, and the inner cavity of the first clamping groove is engaged with the surface of the clamping block and the lock shell module respectively. A first clamping ring is arranged on the outer surface of the support tube, and an adjustment structure is arranged in the inner cavity of the support tube.

[0009] Exemplarily, the adjustment structure includes a support pin, which is inserted and movably located in the inner cavity of the support tube, the surface of the support pin is provided with an adjustment groove, the surface of the support tube is provided with a support hole, the inner cavity of the support hole is provided with a pin rod, and the bottom end of the pin rod is slidably connected to the inner cavity of the adjustment groove.

[0010] Exemplarily, a first positioning pin is provided at the bottom end of the three groups of extension seats, a first positioning hole is provided at one end of the first positioning pin, an inner cavity of the first positioning hole is engaged with the other end of the first positioning pin, and a first connecting hole is provided on a side of the lock shell close to the extension module, and an inner cavity of the first connecting hole is engaged with the first positioning pin.

[0011] Exemplarily, an arc-shaped groove is formed on the lower surface of the extension seat, and the inner cavity of the arc-shaped groove fits with the surface of the connecting shaft.

[0012] Exemplarily, the lock module includes a lock shell, a first supporting groove is provided at the bottom end of the lock shell, the inner cavity of the first supporting groove is engaged with one end of the connecting shaft, the inner cavity of the lock shell is provided with a lock core shaft, and a second slot is provided at one end of the lock core shaft close to the extension module, and the inner cavity of the second slot is engaged with the clamping block.

[0013] Exemplarily, the lock shell module includes a lock shell seat, a shift plate is provided at one end of the lock shell seat, and a clamping seat is fixedly connected to the end of the shift plate away from the lock shell seat, the surface of the clamping seat is engaged with the inner cavity of the first clamping slot, and a connecting groove is provided at the other end of the shift plate, and the inner cavity of the connecting groove is engaged with the surface of the lock shell seat, and a second supporting groove is provided at the bottom end of the lock shell seat, and the inner cavity of the second supporting groove is engaged with the surface of the connecting shaft.

[0014] Exemplarily, the lock base module includes a lock base shell, a counter-locking module is provided at one end of the lock base shell, an extension shell is provided at the other end of the lock base shell, three groups of extension shells are provided, and a second positioning pin is provided at the bottom end of the three groups of extension shells. A second positioning hole is provided at one end of the second positioning pin, and the inner cavity of the second positioning hole is engaged with the other end of the second positioning pin. A second connecting hole is provided on a side of the lock head shell close to the extension module, and the inner cavity of the second connecting hole is engaged with the first positioning pin.

[0015] Exemplarily, the locking structure includes a bolt hole, a fixing hole and a threaded hole, the bolt hole is opened on the surface of the lock base shell, the inner cavity of the threaded hole is provided with a locking screw, the fixing hole is opened on the surface of the extension sleeve, the threaded hole is opened on the surface of the lock shell seat, and one end of the locking screw passes through the fixing hole and is threadedly connected to the inner cavity of the threaded hole.

[0016] A lock comprises a modular lock core as described in any one of the above.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a modular lock core and lock. Through the cooperation of an extension module, a lock head module, a lock shell module and a lock seat module, the internal structure of the lock core is modularly arranged, so that the parts are prevented from being scattered after the lock core is disassembled. Through the cooperation of the extension seat and the connection mechanism, the lock head module and the lock shell module can be quickly connected and assembled. Through the arrangement of three groups of extension seats, extension seats of different thicknesses can be added according to the thickness of the anti-theft door, and the three groups of extension seats can be arbitrarily combined and disassembled. The lock core is extended in cooperation, thereby shortening the user's assembly work on the parts in the lock core, simplifying the difficulty of the user's assembly of the lock core, avoiding the phenomenon of scattered parts, and providing convenience for the addition and modification of the accessories of the lock core.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall accessory structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure after the lock core and the extension module of the present invention are assembled;

[0022] Figure 3 This is a schematic diagram of the modular disassembly structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the disassembly structure of the extension module of the present invention;

[0024] Figure 5 This is a schematic diagram of the disassembly structure of the connecting mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the lock housing of the present invention when the lock core shaft is disassembled;

[0026] Figure 7 It is a structural schematic diagram of the lock housing module of the present invention from the right side;

[0027] Figure 8 It is a structural schematic diagram of the lock housing module of the present invention from the left side;

[0028] Fig. 9 It is a structural schematic diagram of the paddle of the present invention;

[0029] Fig.10 It is a schematic diagram of the exploded structure of the lock base module of the present invention.

[0030] In the figure: 1. extension module; 11. extension seat; 12. connection mechanism; 121. support tube; 122. clamping block; 123. first clamping groove; 124. first clamping ring; 125. adjustment structure; 1251. support pin; 1252. adjustment groove; 1253. support hole; 1254. pin rod; 2. lock module; 21. lock shell; 22. first support groove; 23. lock core shaft; 24. second clamping groove; 3. lock shell module; 31. lock shell seat; 3 2. The dial plate; 33. The card seat; 34. The connecting groove; 35. The second supporting groove; 4. The lock seat module; 41. The lock seat shell; 42. The anti-locking module; 43. The extension shell; 44. The second positioning pin; 45. The second positioning hole; 46. The second connecting hole; 5. The connecting shaft; 6. The locking structure; 61. The bolt hole; 62. The fixing hole; 63. The threaded hole; 64. The locking screw; 7. The first positioning pin; 8. The first positioning hole; 9. The first connecting hole; 10. The arc groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-10 The present invention provides a modular lock core, including an extension module 1, a lock head module 2, a lock shell module 3 and a lock seat module 4. The extension module 1 is arranged between the lock head module 2 and the lock shell module 3. One side of the extension module 1 is engaged with the surface of the lock head module 2, and the other side of the extension module 1 is engaged with the surface of the lock shell module 3. A connecting shaft 5 is arranged at the bottom end of the lock head module 2. A locking structure 6 is arranged at one end of the lock seat module 4 for convenient locking with the lock shell module 3. The extension module 1 includes an extension seat 11. The extension seat 11 is provided with three groups. The three groups of extension seats 11 Through holes are provided on the surface, and the inner cavities of the three groups of extension seats 11 are provided with connecting mechanisms 12. The three groups of extension seats 11 are connected by the connecting mechanisms 12, and the lock head module 2 and the lock shell module 3 are connected by the connecting mechanisms 12. The thicknesses of the three groups of extension seats 11 are different, and the thicknesses of the three groups of extension seats 11 increase in sequence. The three groups of extension seats 11 can be arbitrarily combined and disassembled to extend the overall length of the lock core. At the same time, different lengths of connecting shafts 5 can be added according to the distance between the lock shell module 3 and the lock head module 2 for matching assembly;

[0033] Specifically, by cooperating with the extension module 1, the lock head module 2, the lock housing module 3 and the lock seat module 4, the internal parts structure of the lock core is modularized to avoid the internal parts from being scattered when the lock core is disassembled. By cooperating with the extension seat 11 and the connection mechanism 12, the lock head module 2 and the lock housing module 3 can be quickly connected and assembled. By setting three groups of extension seats 11, extension seats 11 of different thicknesses can be added according to the thickness of the anti-theft door, and the three groups of extension seats 11 can be combined and disassembled at will. The lock core is extended in cooperation, thereby shortening the user's assembly work of the parts in the lock core, simplifying the difficulty of the user's assembly of the lock core, avoiding the phenomenon of scattered parts, and providing convenience for the addition and modification of the accessories of the lock core.

[0034] Preferably, the connecting mechanism 12 includes a support tube 121, which is arranged in the inner cavity of the extension seat 11, one end of the support tube 121 is fixedly connected with a block 122, the surface of the block 122 is engaged with the lock module 2, and the other end of the support tube 121 is provided with a first slot 123, the inner cavity of the first slot 123 is engaged with the surface of the block 122 and the lock shell module 3 respectively, the outer surface of the support tube 121 is provided with a first snap ring 124, and the inner cavity of the support tube 121 is provided with an adjusting structure. Structure 125. When the extension seats 11 are assembled, take one group of extension seats 11 and fit them against the surface of another group of extension seats 11, so that the clamping block 122 is inserted into the inner cavity of the first clamping groove 123, so that the extension seats 11 can be matched and connected, so that the three groups of extension seats 11 can be combined and disassembled arbitrarily, and cooperate to extend the overall length of the lock cylinder. At the same time, the inner cavity of the extension seat 11 is also provided with a clamping ring groove, and the clamping ring groove cooperates with the first clamping ring 124 to position the support tube 121 in the inner cavity of the extension seat 11.

[0035] Furthermore, the adjustment structure 125 includes a support pin 1251, which is located in the inner cavity of the support tube 121 for insertion and movement. An adjustment groove 1252 is provided on the surface of the support pin 1251, and a support hole 1253 is provided on the surface of the support tube 121. The inner cavity of the support hole 1253 is provided with a pin rod 1254, and the bottom end of the pin rod 1254 is slidably connected to the inner cavity of the adjustment groove 1252. Through the cooperation of the support hole 1253, the pin rod 1254 and the adjustment groove 1252, the support pin 1251 is restricted in the inner cavity of the support tube 121, thereby limiting the moving position of the support pin 1251 in the support tube 121 and preventing the support pin 1251 from moving out of the inner cavity of the support tube 121 when moving.

[0036] In addition, a first locating pin 7 is provided at the bottom end of the three groups of extension seats 11, and a first locating hole 8 is provided at one end of the first locating pin 7, and the inner cavity of the first locating hole 8 is engaged with the other end of the first locating pin 7, and a first connecting hole 9 is provided on one side of the lock shell 21 close to the extension module 1, and the inner cavity of the first connecting hole 9 is engaged with the first locating pin 7. Through the cooperation between the first locating pin 7 and the first locating hole 8, when the extension seats 11 are combined, the first locating pin 7 on the extension seat 11 is inserted into the inner cavity of the first locating hole 8, so as to provide preliminary support for the combined state between the two groups of extension seats 11, and avoid the displacement and change of the position after the combination, and through the cooperation between the first locating pin 7 and the first connecting hole 9, the combined state between the extension module 1 and the lock module 2 is supported, thereby improving the stability of the extension module 1 and the lock module 2 after the combination.

[0037] Furthermore, an arc groove 10 is provided on the lower surface of the extension seat 11, and the inner cavity of the arc groove 10 is fitted with the surface of the connecting shaft 5. Through the setting of the arc groove 10, the fit between the lower surface of the extension seat 11 and the connecting shaft 5 is increased, so that the bottom end of the extension seat 11 can cooperate to support the top end of the connecting shaft 5, thereby improving the stability of the connecting shaft 5 in the lock core.

[0038] In a further preferred embodiment, the lock module 2 includes a lock shell 21, a first supporting groove 22 is provided at the bottom end of the lock shell 21, the inner cavity of the first supporting groove 22 is engaged with one end of the connecting shaft 5, and a lock core shaft 23 is provided in the inner cavity of the lock shell 21. A second card slot 24 is provided at one end of the lock core shaft 23 close to the extension module 1, and the inner cavity of the second card slot 24 is engaged with the card block 122. One end of the connecting shaft 5 is supported and fixed by the first supporting groove 22, and the lock core shaft 23 and the extension seat 11 can be quickly combined through the cooperation of the second card slot 24 and the card block 122 on the lock core shaft 23. At the same time, when the key is inserted into the lock core shaft 23 and rotated, the card block 122 can be driven to rotate through the second card slot 24, so that the support tube 121 in the extension seat 11 rotates, and the support tube 121 drives the lock shell module 3 to rotate through the first card slot 123 at the other end, so that the lock core can work.

[0039] Specifically, the lock shell module 3 includes a lock shell seat 31, one end of the lock shell seat 31 is provided with a dial plate 32, and the end of the dial plate 32 away from the lock shell seat 31 is fixedly connected with a card seat 33, the surface of the card seat 33 is engaged with the inner cavity of the first card slot 123, and the other end of the dial plate 32 is provided with a connecting groove 34, and the inner cavity of the connecting groove 34 is engaged with the surface of the lock shell seat 31. The bottom end of the lock shell seat 31 is provided with a second supporting groove 35, and the inner cavity of the second supporting groove 35 is engaged with the surface of the connecting shaft 5. Through the cooperation of the card seat 33 and the first card slot 123, the extension The support tube 121 in the seat 11 rotates, and drives the seat 33 to rotate through the first slot 123, so that the dial plate 32 at the other end of the seat 33 rotates, and the rotation of the dial plate 32 drives the parts in the lock shell seat 31 to rotate through the connecting slot 34. The setting of the second supporting slot 35 at the bottom end of the lock shell seat 31 can support the other end of the connecting shaft 5, thereby improving the stability of the connecting shaft 5 in the lock core. The connecting shaft 5 is connected to the lock core by plugging, which simplifies the installation work between the connecting shaft 5 and the lock core and provides convenience for the assembly work of the connecting shaft 5 and the lock core.

[0040] Furthermore, the lock base module 4 includes a lock base shell 41, one end of the lock base shell 41 is provided with an anti-locking module 42, the other end of the lock base shell 41 is provided with an extension shell 43, the extension shell 43 is provided with three groups, the bottom ends of the three groups of extension shells 43 are all provided with a second positioning pin 44, one end of the second positioning pin 44 is provided with a second positioning hole 45, the inner cavity of the second positioning hole 45 is matched with the other end of the second positioning pin 44, and a second connecting hole 46 is provided on one side of the lock head shell 21 close to the extension module 1, and the inner cavity of the second connecting hole 46 is matched with the second positioning pin 44. The lock base shell 41 and the lock shell base 31 are locked by locking. The structure 6 is connected, and the thicknesses of the three groups of extension sleeves 43 increase sequentially. A fixing ring is fixedly connected to one end of the extension sleeve 43, and a fixing groove is provided at the other end of the extension sleeve 43. The fixing ring and the inner cavity of the fixing groove are engaged with each other. Through the cooperation between the fixing ring and the fixing groove, the top end of the extension sleeve 43 after assembly can be supported. Through the cooperation between the second positioning pin 44 and the second positioning hole 45, when the two groups of extension sleeves 43 are assembled, the second positioning pin 44 can be inserted into the inner cavity of the second positioning hole 45 to support the bottom end of the extension sleeve 43 after assembly, thereby improving the stability of the extension sleeves 43 after assembly.

[0041] In addition, the locking structure 6 includes a bolt hole 61, a fixing hole 62 and a threaded hole 63. The bolt hole 61 is opened on the surface of the lock base shell 41. The inner cavity of the threaded hole 63 is provided with a locking screw 64. The fixing hole 62 is opened on the surface of the extension sleeve 43. The threaded hole 63 is opened on the surface of the lock shell base 31. One end of the locking screw 64 passes through the fixing hole 62 and is threadedly connected with the inner cavity of the threaded hole 63. The bottom end of the lock base shell 41 is provided with a fixing block, and the fixing block is engaged with the inner cavity of the second positioning hole 45. 5, which improves the stability of the lock base shell 41 and the extension shell 43 after assembly. After the extension shell 43 is assembled with the lock base shell 41, it is then assembled with the lock shell base 31, so that the second positioning pin is inserted into the inner cavity of the second connecting hole 46 to complete the assembly, and then the length between the lock shell base 31 and the lock base shell 41 is adjusted to take locking screws 64 of different lengths, and the locking screws 64 are inserted into the bolt hole 61, penetrate the fixing hole 62 and extend to the inner cavity of the threaded hole 63, and then locked, so that the lock base shell 41 and the lock shell base 31 are combined and fixed.

[0042] The present invention also provides a lock, comprising a modular lock core according to any one of the above items.

[0043] When in use, during assembly, the lock core is modified according to the thickness of the lock core anti-theft door to be installed. First, the extension seat 11 is combined with the dial plate 32, so that the card seat 33 on the dial plate 32 is carded with the first card slot 123. When the thickness is increased, the number of extension seats 11 is increased, so that the card block 122 is carded with the first card slot 123, and the support tube 121 in the extension seat 11 is connected. At the same time, the first locating pin 7 at the bottom is inserted into the inner cavity of the first locating hole 8 to support the extension seat 11 after assembly. Then, the connecting shaft 5 is taken out and inserted into the second supporting groove 35, and the lock head shell 21 is covered, so that the first supporting groove 22 is carded with the other end of the connecting shaft 5, and the second card slot 24 of the lock core shaft 23 is carded with the card block 122. At the same time, the first locating pin 7 can be inserted into the lock head shell 21 through-hole inner cavity is supported to complete the assembly between the lock head module 2, the extension module 1 and the lock shell module 3. When assembling the lock base module 4, the extension shell 43 is assembled with the lock base shell 41. When extending the length, the number of extension shells 43 is increased. When assembling two groups of extension shells 43, the second positioning pin 44 can be inserted into the inner cavity of the second positioning hole 45 to support the bottom end of the combined extension shell 43. Through the cooperation of the fixing ring and the fixing groove, the top end of the assembled extension shell 43 can be supported. Finally, it is assembled with the lock shell base 31, and the locking screw 64 is inserted into the bolt hole 61, passing through the fixing hole 62 and extending to the inner cavity of the threaded hole 63, and then locked, so that the lock base shell 41 and the lock shell base 31 are combined and fixed, thereby completing the modular assembly;

[0044] When in use, insert the key into the lock core shaft 23 and rotate it, which can drive the card block 122 to rotate through the second card slot 24, so that the support tube 121 in the extension seat 11 rotates, and the support tube 121 drives the lock shell module 3 to rotate through the first card slot 123 at the other end, so that the parts in the lock head shell 21 and the parts in the lock shell seat 31 rotate. When reverse locking, twist the reverse locking module 42 to drive the support plate to rotate, so that the other end of the support plate rotates in the inner cavity of the lock shell seat 31, so that the parts in the lock shell seat 31 rotate, and the lock shell module 3 starts to work, thereby shortening the user's assembly work of the parts in the lock core, simplifying the difficulty of the user's assembly of the lock core, avoiding the phenomenon of parts scattering and falling, and providing convenience for the addition and modification of the accessories of the lock core.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular lock core, comprising an extension module (1), a lock head module (2), a lock housing module (3) and a lock seat module (4), characterized in that: The extension module (1) is arranged between the lock module (2) and the lock shell module (3); one side of the extension module (1) is engaged with the surface of the lock module (2), and the other side of the extension module (1) is engaged with the surface of the lock shell module (3); a connecting shaft (5) is arranged at the bottom end of the lock module (2); one end of the lock seat module (4) is arranged with a locking structure (6) for convenient locking with the lock shell module (3); the extension module (1) comprises an extension seat (11); three groups of the extension seats (11) are arranged; the surfaces of the three groups of the extension seats (11) are all provided with through holes; the inner cavities of the three groups of the extension seats (11) are all provided with connecting mechanisms (12); the three groups of the extension seats (11) are connected by the connecting mechanisms (12); and the lock module (2) and the lock shell module (3) are connected by the connecting mechanisms (12).

2. A modular lock core according to claim 1, characterized in that: The connecting mechanism (12) comprises a supporting tube (121), wherein the supporting tube (121) is arranged in the inner cavity of the extension seat (11), one end of the supporting tube (121) is fixedly connected with a clamping block (122), the surface of the clamping block (122) is engaged with the lock head module (2), the other end of the supporting tube (121) is provided with a first clamping groove (123), the inner cavity of the first clamping groove (123) is engaged with the surface of the clamping block (122) and the lock shell module (3) respectively, the outer surface of the supporting tube (121) is provided with a first clamping ring (124), and the inner cavity of the supporting tube (121) is provided with an adjusting structure (125).

3. A modular lock core according to claim 2, characterized in that: The adjustment structure (125) comprises a support pin (1251), the support pin (1251) is inserted and movably located in the inner cavity of the support tube (121), the surface of the support pin (1251) is provided with an adjustment groove (1252), the surface of the support tube (121) is provided with a support hole (1253), the inner cavity of the support hole (1253) is provided with a pin rod (1254), and the bottom end of the pin rod (1254) is slidably connected to the inner cavity of the adjustment groove (1252).

4. A modular lock core according to claim 1, characterized in that: The bottom ends of the three groups of extension seats (11) are all provided with a first positioning pin (7), one end of the first positioning pin (7) is provided with a first positioning hole (8), the inner cavity of the first positioning hole (8) is engaged with the other end of the first positioning pin (7), and a first connecting hole (9) is provided on a side of the lock housing (21) close to the extension module (1), and the inner cavity of the first connecting hole (9) is engaged with the first positioning pin (7).

5. A modular lock core according to claim 1, characterized in that: The lower surface of the extension seat (11) is provided with an arc-shaped groove (10), and the inner cavity of the arc-shaped groove (10) is in contact with the surface of the connecting shaft (5).

6. A modular lock core according to claim 2, characterized in that: The lock module (2) comprises a lock shell (21), a first supporting groove (22) is provided at the bottom end of the lock shell (21), the inner cavity of the first supporting groove (22) is engaged with one end of the connecting shaft (5), a lock core shaft (23) is provided in the inner cavity of the lock shell (21), a second card slot (24) is provided at one end of the lock core shaft (23) close to the extension module (1), and the inner cavity of the second card slot (24) is engaged with the card block (122).

7. A modular lock core according to claim 2, characterized in that: The lock housing module (3) comprises a lock housing seat (31), one end of the lock housing seat (31) is provided with a shift plate (32), one end of the shift plate (32) away from the lock housing seat (31) is fixedly connected with a clamping seat (33), the surface of the clamping seat (33) is engaged with the inner cavity of the first clamping groove (123), the other end of the shift plate (32) is provided with a connecting groove (34), the inner cavity of the connecting groove (34) is engaged with the surface of the lock housing seat (31), and the bottom end of the lock housing seat (31) is provided with a second supporting groove (35), the inner cavity of the second supporting groove (35) is engaged with the surface of the connecting shaft (5).

8. A modular lock core according to claim 1, characterized in that: The lock base module (4) comprises a lock base shell (41), one end of which is provided with a reverse locking module (42), and the other end of which is provided with an extension shell (43), wherein three groups of the extension shells (43) are provided, and the bottom ends of the three groups of the extension shells (43) are all provided with a second positioning pin (44), one end of the second positioning pin (44) is provided with a second positioning hole (45), and the inner cavity of the second positioning hole (45) is engaged with the other end of the second positioning pin (44), and a second connecting hole (46) is provided on a side of the lock head shell (21) close to the extension module (1), and the inner cavity of the second connecting hole (46) is engaged with the second positioning pin (44).

9. A modular lock core according to claim 8, characterized in that: The locking structure (6) comprises a bolt hole (61), a fixing hole (62) and a threaded hole (63); the bolt hole (61) is opened on the surface of the lock base shell (41); the inner cavity of the threaded hole (63) is provided with a locking screw (64); the fixing hole (62) is opened on the surface of the extension sleeve (43); the threaded hole (63) is opened on the surface of the lock shell base (31); one end of the locking screw (64) passes through the fixing hole (62) and is threadedly connected to the inner cavity of the threaded hole (63).

10. A lock, characterized in that: A modular lock core comprising any one of claims 1-9.

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