An adjustable length lock cylinder

Abstract

The utility model discloses a length -adjustable lock cylinder, lock cylinder main part, including base, installation pole body, drive seat and at least one transmission assembly. Drive seat is installed on installation pole body, and transmission assembly can need according to actual lock cylinder length, and the parallel installation of selecting appropriate number is installed on installation pole body, because installation pole body is detachably spliced and forms through connecting rod and extension bar, when the size that lock cylinder needs to extend is smaller, can not need to install extension bar, only through connecting rod to install transmission assembly and drive seat, make installation pole body in the door and occupy smaller space, when the size that lock cylinder needs to extend is bigger, can through installing extension bar, make the length of installation pole body be bigger, thereby can accommodate install more number transmission assembly, make lock cylinder can have greater length adjustment range, and use relatively nimble.

Description

Technical Field

[0001] This utility model relates to the field of door locks, and in particular to an adjustable length lock cylinder. Background Technology

[0002] Some existing door locks have adjustable lock cylinder lengths. The lock cylinder includes a cylinder body, a dial mechanism, and a drive shaft. The cylinder body includes a base, a connecting rod, a drive seat, and several transmission components. The connecting rod is fixedly connected to the base, the drive seat is mounted on the connecting rod and its position can be adjusted along the connecting rod, the dial mechanism is rotatably connected to the cylinder body, and the drive shaft is rotatably connected to the drive seat. When the door thickness is small, the lock cylinder is in its initial state without transmission components, resulting in a shorter overall length. When the door thickness is large, one or more transmission components can be arranged and installed at the connecting rod. These transmission components are located between the drive seat and the base, and each component has a rotatable transmission connector. The drive shaft can indirectly drive the dial mechanism through the transmission connector, thereby extending the overall length of the lock cylinder. Currently, the adjustable range of this type of lock cylinder length is relatively small, making it less flexible in use. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an adjustable length lock cylinder, which can have a wider range of length adjustment and is relatively flexible in use.

[0004] According to an embodiment of the present invention, an adjustable length lock cylinder includes a lock cylinder body comprising a base, a mounting rod, a drive seat, and at least one transmission assembly. One end of the mounting rod is disposed on the base, and the mounting rod is disposed along a first direction. The drive seat is adjustablely disposed on the mounting rod along the first direction. The transmission assembly includes a transmission seat and a transmission connector. The transmission seat is mountable on the mounting rod, and the transmission connector is rotatably disposed on the transmission seat with its rotation axis disposed along the first direction. A dial is rotatably disposed on the lock cylinder body with its rotation axis disposed along the first direction. The drive shaft is rotatably mounted on the drive seat, and its rotation axis is collinear with the rotation axis of the dial piece. The lock cylinder has an initial state and an extended state. In the initial state, the drive shaft is connected to the dial piece in a transmission manner. In the extended state, at least one transmission assembly is provided between the base and the drive seat. The transmission seat is mounted on the mounting rod body, and the transmission connector is located between the drive shaft and the dial piece. The drive shaft and the dial piece are connected by transmission through the transmission connector. The mounting rod body includes a connecting rod and an extension rod. One end of the connecting rod is fixedly connected to the base, and the extension rod is detachably connected to the other end of the connecting rod.

[0005] The adjustable length lock cylinder according to the embodiments of this utility model has at least the following beneficial effects: the drive seat is mounted on the mounting rod, and the transmission components can be selected in appropriate quantities and arranged on the mounting rod according to the actual lock cylinder length requirements. Since the mounting rod is detachably spliced ​​together by connecting rods and extension rods, when the lock cylinder needs to be extended by a small dimension, it is not necessary to install extension rods; the transmission components and drive seat can be installed only through connecting rods, thus reducing the space occupied by the mounting rod inside the door. When the lock cylinder needs to be extended by a large dimension, the length of the mounting rod can be increased by installing extension rods, thereby accommodating a larger number of transmission components, allowing the lock cylinder to have a larger length adjustment range and be more flexible in use.

[0006] According to some embodiments of the present invention, the other end of the connecting rod is provided with a threaded connection hole, and one end of the extension rod is provided with a screw portion, the screw portion being threadedly connected to the threaded connection hole.

[0007] According to some embodiments of the present invention, the transmission assembly further includes an axial positioning structure, which is disposed between the transmission seat and the transmission connector and is used to limit the position of the transmission connector relative to the transmission connector along the first direction. The transmission connector is rolledly connected to the transmission seat through the axial positioning structure.

[0008] According to some embodiments of the present invention, the axial positioning structure includes an annular guide groove, a ball bearing, and an elastic element. The transmission seat is provided with a rotating connection hole, and the transmission connector is rotatably inserted into the rotating connection hole. The annular guide groove is disposed around the rotation axis of the transmission connector on the hole wall of the rotating connection hole. A first mounting hole is provided on the outer periphery of the transmission connector. The ball bearing is retractably disposed in the first mounting hole. The elastic element is disposed in the first mounting hole and can drive the ball bearing to protrude from the opening of the first mounting hole. The ball bearing is rotatably connected to the annular guide groove.

[0009] According to some embodiments of the present invention, the lock cylinder body further includes a locking member, the drive seat is provided with a second mounting hole along the first direction, the mounting rod is slidably inserted into the second mounting hole, and the locking member is disposed between the mounting rod and the drive seat and can lock or unlock the position of the drive seat relative to the base.

[0010] According to some embodiments of the present invention, the locking member is a threaded fastener, the mounting rod body is provided with at least two stop slots arranged along the first direction, the drive seat is provided with a threaded through hole, the threaded through hole extends to the hole wall of the second mounting hole, and the threaded fastener is threadedly connected to the threaded through hole and inserted into part of the stop slot.

[0011] According to some embodiments of the present invention, the extension rod is threaded to the connecting rod, and both the connecting rod and the extension rod are provided with the stop groove. The stop groove on the connecting rod is a circular hole groove, and the stop groove on the extension rod is an annular groove arranged around the central axis of the extension rod.

[0012] According to some embodiments of this utility model, the dial head is provided with a first transmission groove, the drive shaft is provided with a first transmission block at one end near the dial head, the transmission connector is provided with a second transmission block at one end along the first direction, and the transmission connector is provided with a second transmission groove at the other end along the first direction, the second transmission block is adapted to the second transmission groove; in the initial state, the first transmission block is inserted into the first transmission groove; in the extended state, the first transmission block is inserted into the second transmission groove, and the first transmission groove is inserted into the second transmission block.

[0013] According to some embodiments of the present invention, in the extended state, the lock cylinder can be installed along the first direction with at least two transmission components. In two adjacent transmission components located on the same installation rod, two transmission connectors are arranged and connected in transmission along the first direction.

[0014] According to some embodiments of the present invention, two drive seats are provided and arranged at intervals along the first direction, the base is located between the two drive seats, two mounting rods are provided and respectively located at both ends of the base along the first direction, the two drive seats are installed on the two mounting rods in a one-to-one correspondence, two drive shafts are provided and rotatably mounted on the drive seats in a one-to-one correspondence, the two drive shafts are arranged at intervals along the first direction, and the dial is located between the two drive shafts.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a perspective view of the lock cylinder in the extended state and with the extension rod installed according to an embodiment of the present utility model.

[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 Schematic cross-sectional view along the AA direction;

[0019] Figure 3 This is a perspective view of the lock cylinder in its initial state and the extension rod being removed, according to an embodiment of the present utility model.

[0020] Figure 4 This is an embodiment of the present utility model. Figure 3 Cross-sectional view along the BB direction;

[0021] Figure 5 This is an exploded view of a portion of the lock cylinder structure according to an embodiment of the present utility model;

[0022] Figure 6 This is an exploded view of the transmission assembly according to an embodiment of the present utility model;

[0023] Figure 7 This is a three-dimensional schematic diagram of the drive shaft according to an embodiment of the present utility model.

[0024] Figure label:

[0025] Lock cylinder body 10;

[0026] Base 100, first circumferential positioning block 110;

[0027] Mounting rod 200, stop groove 201, connecting rod 210, threaded connection hole 211, extension rod 220, screw part 221;

[0028] Drive base 300, second mounting hole 310, threaded through hole 320, first circumferential positioning groove 330;

[0029] Transmission assembly 400, transmission seat 410, rotating connection hole 411, second circumferential positioning block 412, second circumferential positioning groove 413, transmission connector 420, first mounting hole 421, second transmission block 422, second transmission groove 423, annular guide groove 430, ball 440, elastic element 450.

[0030] Dial head component 500, first transmission groove 510;

[0031] Drive shaft 600, first transmission block 610, gear through hole 620;

[0032] Locking knob 700, positioning screw 710. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and 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 utility model.

[0035] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] Reference Figures 1 to 7 This invention relates to an adjustable length lock cylinder, comprising a lock cylinder body 10, a dial 500, and a drive shaft 600. The lock cylinder body 10 includes a base 100, a mounting rod 200, a drive seat 300, and at least one transmission assembly 400. One end of the mounting rod 200 is disposed on the base 100, and the mounting rod 200 is arranged along a first direction. The drive seat 300 is adjustablely positioned on the mounting rod 200 along the first direction. The transmission assembly 400 includes a transmission seat 410 and a transmission connector 420. The transmission seat 410 can be mounted on the mounting rod 200, and the transmission connector 420 is rotatably disposed on the transmission seat 410 with its rotation axis arranged along the first direction. The dial 500 is rotatably disposed on the lock cylinder body 10 with its rotation axis arranged along the first direction. The drive shaft 600 is rotatably disposed on the drive seat 300 with its rotation axis arranged along the first direction. The rotation axis of the line and the dial 500 are collinear; the lock cylinder has an initial state and an extended state. In the initial state, the drive shaft 600 is connected to the dial 500 in a transmission connection; in the extended state, at least one transmission assembly 400 is provided between the base 100 and the drive seat 300. The transmission seat 410 is mounted on the mounting rod 200, and the transmission connector 420 is located between the drive shaft 600 and the dial 500. The drive shaft 600 and the dial 500 are connected by the transmission connector 420; wherein the mounting rod 200 includes a connecting rod 210 and an extension rod 220. One end of the connecting rod 210 is fixedly connected to the base 100, and the extension rod 220 is detachably connected to the other end of the connecting rod 210.

[0038] The drive seat 300 is mounted on the mounting rod 200. The transmission components 400 can be selected in appropriate quantities and arranged on the mounting rod 200 according to the actual lock cylinder length requirements. Since the mounting rod 200 is detachably spliced ​​together by the connecting rod 210 and the extension rod 220, when the lock cylinder needs to be extended by a small size, the extension rod 220 does not need to be installed. The transmission components 400 and the drive seat 300 can be installed only through the connecting rod 210, so that the mounting rod 200 occupies less space inside the door. When the lock cylinder needs to be extended by a large size, the extension rod 220 can be installed to make the length of the mounting rod 200 larger, thereby accommodating more transmission components 400, so that the lock cylinder can have a larger length adjustment range and be used more flexibly.

[0039] Specifically, the connecting rod 210 and the base 100 are integrally formed, which helps to reduce the number of parts and simplify assembly.

[0040] In the embodiments, reference is made to Figure 5 The other end of the connecting rod 210 is provided with a threaded connection hole 211, and one end of the extension rod 220 is provided with a screw part 221, which is threadedly connected to the threaded connection hole 211. When the mounting rod 200 needs to be extended, the extension rod 220 is threadedly connected to the threaded connection hole 211 of the connecting rod 210 through the screw part 221 to achieve extension; when the mounting rod 200 does not need to be extended, the extension rod 220 can be unscrewed and disassembled. The installation and disassembly are relatively convenient, and the strength is high during assembly.

[0041] It is conceivable that in other embodiments, the connecting rod 210 may also be detachably connected to the extension rod 220 through other structures. For example, the end of the connecting rod 210 is provided with a slot, and one end of the extension rod 220 is provided with a locking block. The two are detachably connected by the locking block engaging with the slot; or the connecting rod 210 may be detachably connected to the extension rod 220 by magnetic attraction.

[0042] In the embodiments, reference is made to Figure 2 The transmission assembly 400 also includes an axial positioning structure, which is disposed between the transmission seat 410 and the transmission connector 420 and is used to limit the position of the transmission connector 420 relative to itself along a first direction. The transmission connector 420 is rolledly connected to the transmission seat 410 through the axial positioning structure. This rolling engagement between the transmission connector 420 and the transmission seat 410 significantly reduces friction and inhibits wear during rotation, making locking and unlocking the lock cylinder easier and extending its service life.

[0043] In the embodiments, reference is made to Figure 6The axial positioning structure includes an annular guide groove 430, a ball 440, and an elastic element 450. The transmission seat 410 is provided with a rotating connection hole 411. The transmission connector 420 is rotatably inserted into the rotating connection hole 411. The annular guide groove 430 is arranged around the rotation axis of the transmission connector 420 on the hole wall of the rotating connection hole 411. The outer periphery of the transmission connector 420 is provided with a first mounting hole 421. The ball 440 is retractably arranged in the first mounting hole 421. The elastic element 450 is arranged in the first mounting hole 421 and can drive the ball 440 to protrude from the opening of the first mounting hole 421. The ball 440 is tumbledly connected to the annular guide groove 430.

[0044] The elastic element 450 pushes the ball 440 out of the opening of the first mounting hole 421. The transmission connector 420 rolls along the annular guide groove 430 via the ball 440, thus achieving a rolling engagement between the two. During assembly, the production personnel can first press the ball 440 into the first mounting hole 421, at which point the elastic element 450 is further compressed. Then, the transmission connector 420 is inserted into the rotating connection hole 411. Subsequently, the elastic element 450 returns to its original position, driving the ball 440 to extend and embed into the annular guide groove 430, completing the assembly. The above-described axial positioning structure is simple in structure and easy to assemble.

[0045] Specifically, the elastic element 450 is a spring. Alternatively, the elastic element 450 can also be an elastic rubber block, etc.

[0046] It is conceivable that in other embodiments, the axial positioning structure may also employ, for example, a snap ring with a bearing, or a thrust bearing.

[0047] In the embodiments, reference is made to Figure 5 The lock cylinder body 10 also includes a locking element. The drive seat 300 has a second mounting hole 310 along a first direction. The mounting rod 200 is slidably inserted into the second mounting hole 310. The locking element is located between the mounting rod 200 and the drive seat 300 and can lock or unlock the position of the drive seat 300 relative to the base 100. After the drive seat 300 slides along the mounting rod, the locking element locks its current position, achieving the function of adjusting the position. The structure is simple and reliable.

[0048] In the embodiments, reference is made to Figure 5 The locking component is a threaded fastener. The mounting rod 200 is provided with at least two stop slots 201 arranged along the first direction. The drive seat 300 is provided with a threaded through hole 320, which extends to the wall of the second mounting hole 310. The threaded fastener is threadedly connected to the threaded through hole 320 and inserted into part of the stop slot 201.

[0049] When it is necessary to lock the position of the drive seat 300, tighten the threaded fastener so that the threaded fastener is inserted into the corresponding stop groove 201, thereby completing the locking; when the threaded fastener is loosened, the drive seat 300 can be moved. The locking method is simple and secure.

[0050] Specifically, the threaded fastener is a screw. Alternatively, other types of threaded fasteners, such as bolts, can also be used, and this is not limited to these specific types.

[0051] It is conceivable that in some other embodiments, the locking element can also be a pin, in which case pin holes are provided in the drive seat 300 and the mounting rod 200 respectively, and the locking is achieved by inserting the pin into the pin holes of both.

[0052] Specifically, the transmission seat 410 is provided with a third mounting hole. When the transmission seat 410 is installed on the mounting rod 200, the mounting rod 200 passes through the third mounting hole and is clamped and fixed by the drive seat 300 and the base 100.

[0053] In the embodiment, refer to 2 and Figure 5 The extension rod 220 is threadedly connected to the connecting rod 210. Both the connecting rod 210 and the extension rod 220 are provided with a stop groove 201. The stop groove 201 on the connecting rod 210 is a circular groove, while the stop groove 201 on the extension rod 220 is an annular groove surrounding the central axis of the extension rod 220. Because the extension rod 220 is detachable via a threaded connection, the stop groove 201 on the extension rod 220 needs to be annular to ensure that the threaded fastener can be stably inserted into the stop groove 201 when tightened, without requiring the extension rod 220 to rotate to a specified angle.

[0054] In the embodiments, reference is made to Figure 5 The dial head 500 is provided with a first transmission groove 510, and the drive shaft 600 is provided with a first transmission block 610 at one end near the dial head 500. The transmission connector 420 is provided with a second transmission block 422 at one end along the first direction, and a second transmission groove 423 at the other end along the first direction. The second transmission block 422 is adapted to the second transmission groove 423. In the initial state, the first transmission block 610 is inserted into the first transmission groove 510. In the extended state, the first transmission block 610 is inserted into the second transmission groove 423, and the first transmission groove 510 is inserted into the second transmission block 422.

[0055] The above structure enables transmission between the drive shaft 600 and the dial piece 500, and enables the drive shaft 600 to transmit power to the dial piece 500 through the transmission connector 420. The structure is simple and easy to implement.

[0056] Specifically, the first transmission groove 510 and the second transmission groove 423 are both cross-shaped grooves, and the first transmission block 610 and the second transmission block 422 are both straight blocks, which have a good transmission effect and are easy to assemble.

[0057] Optionally, in other embodiments, a first transmission block 610 may be provided in the dial 500, and a first transmission groove 510 may be provided in the transmission connector 420.

[0058] In the embodiments, reference is made to Figure 1 and Figure 2 When the lock cylinder is in the extended state, the mounting rod 200 can be arranged to install at least two transmission components 400 along the first direction. Among the two adjacent transmission components 400 located on the same mounting rod 200, two transmission connectors 420 are arranged along the first direction and connected by transmission.

[0059] Specifically, when two or more transmission assemblies 400 are installed on the same mounting rod 200, in two adjacent transmission connectors 420, the second transmission block 422 of one transmission connector 420 is inserted into the second transmission groove 423 of the other transmission connector 420 to achieve a transmission connection between them. The aforementioned transmission assembly 400 allows multiple adjacent transmission connectors 420 to rotate synchronously, has a simple structure, is easy to implement, and offers good flexibility in use.

[0060] In the embodiments, reference is made to Figure 1 and Figure 3 Two drive seats 300 are provided and arranged at intervals along the first direction. The base 100 is located between the two drive seats 300. Two mounting rods 200 are provided and respectively located at both ends of the base 100 along the first direction. The two drive seats 300 are installed on the two mounting rods 200 in a one-to-one correspondence. Two drive shafts 600 are provided and rotatably mounted on the drive seats 300 in a one-to-one correspondence. The two drive shafts 600 are arranged at intervals along the first direction. The dial 500 is located between the two drive shafts 600.

[0061] Specifically, one drive shaft 600 is a handle drive shaft 600, which can be used to install a handle, and the other drive shaft 600 is a deadbolt drive shaft 600, which can be used to install a deadbolt knob 700. This structure allows for a wider range of lock cylinder length adjustments and more flexible adjustments, making it suitable for conventional lock cylinders.

[0062] Specifically, the deadbolt drive shaft 600 has two or more gear through holes 620 arranged along its length at one end away from the dial piece 500. The deadbolt drive shaft 600 is inserted into the deadbolt knob 700, and the deadbolt knob 700 is threadedly connected with a positioning screw 710. The positioning screw 710 passes through one of the gear through holes 620. By switching the positioning screw 710 to pass through different gear through holes 620, the position of the deadbolt knob 700 relative to the deadbolt drive shaft 600 can be adjusted to adapt to different door thicknesses.

[0063] Specifically, in this embodiment, each mounting rod 200 of the lock cylinder can be equipped with one or two transmission components 400. Optionally, in other embodiments, each mounting rod 200 can be equipped with three, four or more transmission components 400, and the number of transmission components 400 is not limited here.

[0064] In the embodiments, reference is made to Figure 2 and Figure 4 The drive seat 300 is provided with two or more threaded through holes 320 evenly arranged along the first direction. The number of threaded through holes 320 is greater than the number of gear slots 201. The distance between two adjacent threaded through holes 320 is equal to the distance between two adjacent gear slots 201, so that the installation can be more secure when the drive seat 300 is locked to the mounting rod 200.

[0065] Specifically, the connecting rod 210 has four stop slots 201, the extension rod 220 has three stop slots 201, and the drive seat 300 has four threaded through holes 320. Optionally, the mounting rod 200 may also have three, four, or more stop slots 201, and the drive seat 300 may have two, three, four, or more threaded through holes 320.

[0066] In the embodiments, reference is made to Figure 3 and Figure 5 The base 100 has a first circumferential positioning block 110 at one end along the first direction, the drive seat 300 has a first circumferential positioning groove 330, the transmission seat 410 has a second circumferential positioning block 412 at one end along the first direction, and a second circumferential positioning groove 413 at the other end along the first direction. In the initial state, the first circumferential positioning block 110 and the first circumferential positioning groove 330 are inserted into each other. In the extended state, the first circumferential positioning block 110 and the second circumferential positioning groove 413 are inserted into each other, and the first circumferential positioning groove 330 and the second circumferential positioning block 412 are inserted into each other. The above structure makes the circumferential position of the base 100, the transmission seat 410 and the drive seat 300 relatively stable and reliable relative to the mounting rod 200 after assembly.

[0067] Specifically, in the initial state, the dial head 500 is rotatably connected to the two drive seats 300 at both ends along the first direction. When the transmission assembly 400 is installed, the dial head 500 is rotatably connected to the transmission seat 410.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An adjustable length lock cylinder, characterized in that, include: The lock cylinder body (10) includes a base (100), a mounting rod (200), a drive seat (300), and at least one transmission assembly (400). One end of the mounting rod (200) is disposed on the base (100), and the mounting rod (200) is disposed along a first direction. The drive seat (300) is disposed on the mounting rod (200) in an adjustable position along the first direction. The transmission assembly (400) includes a transmission seat (410) and a transmission connector (420). The transmission seat (410) can be mounted on the mounting rod (200), and the transmission connector (420) is rotatably disposed on the transmission seat (410) with its rotation axis disposed along the first direction. A dial (500) is rotatably mounted on the lock cylinder body (10) with its rotation axis arranged along the first direction; A drive shaft (600) is rotatably mounted on the drive seat (300) and its rotation axis is collinear with the rotation axis of the dial (500); The lock cylinder has an initial state and an extended state. In the initial state, the drive shaft (600) is connected to the dial piece (500) in a driving connection. In the extended state, at least one of the transmission components (400) is provided between the base (100) and the drive seat (300). The transmission seat (410) is mounted on the mounting rod (200). The transmission connector (420) is located between the drive shaft (600) and the dial piece (500). The drive shaft (600) and the dial piece (500) are driven by the transmission connector (420). The mounting rod (200) includes a connecting rod (210) and an extension rod (220). One end of the connecting rod (210) is fixedly connected to the base (100), and the extension rod (220) is detachably connected to the other end of the connecting rod (210).

2. The adjustable length lock cylinder according to claim 1, characterized in that: The other end of the connecting rod (210) is provided with a threaded connection hole (211), and one end of the extension rod (220) is provided with a screw part (221), which is threadedly connected to the threaded connection hole (211).

3. The adjustable length lock cylinder according to claim 1, characterized in that: The transmission assembly (400) further includes an axial positioning structure, which is disposed between the transmission seat (410) and the transmission connector (420) and is used to limit the position of the transmission connector (420) relative to the transmission connector (420) along the first direction. The transmission connector (420) is rolledly connected to the transmission seat (410) through the axial positioning structure.

4. The adjustable length lock cylinder according to claim 3, characterized in that: The axial positioning structure includes an annular guide groove (430), a ball (440), and an elastic element (450). The transmission seat (410) is provided with a rotating connection hole (411). The transmission connector (420) is rotatably inserted into the rotating connection hole (411). The annular guide groove (430) is arranged around the rotation axis of the transmission connector (420) on the hole wall of the rotating connection hole (411). The outer periphery of the transmission connector (420) is provided with a first mounting hole (421). The ball (440) is telescopically disposed in the first mounting hole (421). The elastic element (450) is disposed in the first mounting hole (421) and can drive the ball (440) to protrude from the opening of the first mounting hole (421). The ball (440) is tumbledly connected to the annular guide groove (430).

5. The adjustable length lock cylinder according to claim 1, characterized in that: The lock cylinder body (10) also includes a locking member. The drive seat (300) is provided with a second mounting hole (310) along the first direction. The mounting rod (200) is slidably inserted into the second mounting hole (310). The locking member is disposed between the mounting rod (200) and the drive seat (300) and can lock or unlock the position of the drive seat (300) relative to the base (100).

6. The adjustable length lock cylinder according to claim 5, characterized in that: The locking component is a threaded fastener. The mounting rod (200) is provided with at least two stop slots (201) arranged along the first direction. The drive seat (300) is provided with a threaded through hole (320). The threaded through hole (320) extends to the wall of the second mounting hole (310). The threaded fastener is threadedly connected to the threaded through hole (320) and inserted into part of the stop slot (201).

7. The adjustable length lock cylinder according to claim 6, characterized in that: The extension rod (220) is threaded to the connecting rod (210). Both the connecting rod (210) and the extension rod (220) are provided with the stop groove (201). The stop groove (201) on the connecting rod (210) is a circular hole groove, and the stop groove (201) on the extension rod (220) is an annular groove arranged around the central axis of the extension rod (220).

8. The adjustable length lock cylinder according to claim 1, characterized in that: The dial (500) is provided with a first transmission groove (510), and the drive shaft (600) is provided with a first transmission block (610) at one end near the dial (500). The transmission connector (420) is provided with a second transmission block (422) at one end along the first direction, and the transmission connector (420) is provided with a second transmission groove (423) at the other end along the first direction. The second transmission block (422) is adapted to the second transmission groove (423). In the initial state, the first transmission block (610) is inserted into the first transmission groove (510). In the extended state, the first transmission block (610) is inserted into the second transmission groove (423), and the first transmission groove (510) is inserted into the second transmission block (422).

9. The adjustable length lock cylinder according to claim 1, characterized in that: In the extended state, the lock cylinder can be installed along the first direction with at least two transmission components (400), located in two adjacent transmission components (400) on the same mounting rod (200), and the two transmission connectors (420) are arranged and connected along the first direction.

10. The adjustable length lock cylinder according to claim 1, characterized in that: Two drive seats (300) are provided and arranged at intervals along the first direction. The base (100) is located between the two drive seats (300). Two mounting rods (200) are provided and respectively located at both ends of the base (100) along the first direction. The two drive seats (300) are installed on the two mounting rods (200) in a one-to-one correspondence. Two drive shafts (600) are provided and rotatably mounted on the drive seats (300) in a one-to-one correspondence. The two drive shafts (600) are arranged at intervals along the first direction. The dial head (500) is located between the two drive shafts (600).

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