Lock cylinder with two ends capable of being lengthened
By fixing the inner handle to the lock cylinder body with the limiting screw and adjusting the outer handle to the extension shaft of the lock cylinder body, combined with the electronic clutch assembly and the positioning concave-convex structure, the length of the lock cylinder can be flexibly adjusted, solving the problem of difficult disassembly and adjustment in the existing technology and improving the adaptability and stability of the lock cylinder.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN CITY JIXIN CORE LOCK CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-12
AI Technical Summary
The existing lock cylinder length adjustment requires disassembling the lock cylinder body, which makes the operation difficult and time-consuming, and cannot flexibly adapt to door bodies with different thicknesses and eccentric distances.
The inner handle is fixed to the lock cylinder body with a limit screw, while the outer handle is adjusted to the lock cylinder body via an extension shaft. Combined with the electronic clutch assembly and the positioning concave-convex structure, the length of the lock cylinder can be flexibly adjusted without disassembling the main body.
The lock cylinder length can be quickly adjusted without disassembling the main body of the lock cylinder, reducing operation time, adapting to door bodies of different thicknesses and eccentric distances, and improving the stability and lifespan of the lock cylinder.
Smart Images
Figure CN224228421U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lock cylinder, and more particularly to a lock cylinder whose two ends can be extended. Background Technology
[0002] Currently, to accommodate door thicknesses and avoid producing multiple lock cylinders of varying lengths simultaneously, an adjustable lock cylinder is needed. For example, the Chinese utility model patent application CN113685090A discloses an extendable lock cylinder structure. This type of structure increases the overall length of the lock cylinder by disassembling the main body into multiple parts and adding connecting parts during assembly to accommodate thicker doors. However, this solution requires disassembling the main body to adjust the length. Since the main body is the most delicate part of the lock cylinder structure, incorrect installation of any component can prevent the lock cylinder from functioning properly. This makes disassembling and assembling the main body extremely difficult and time-consuming, making the actual process of adjusting the lock cylinder length inconvenient.
[0003] Therefore, overcoming the aforementioned shortcomings has become an important issue that urgently needs to be addressed by those skilled in the art. Utility Model Content
[0004] This invention overcomes the shortcomings of the above-mentioned technologies and provides a lock cylinder that can be extended at both ends.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A lock cylinder with extendable ends includes a lock cylinder body 1. The lock cylinder body 1 has a first drive shaft 2 extending inward to the inside of the door. The first drive shaft 2 is connected to a lever 3 and rotates synchronously. The first drive shaft 2 has several first positioning holes 21 that extend radially and are evenly distributed axially. An inner handle 4 is sleeved on the first drive shaft 2. The side wall of the inner handle 4 has a second positioning threaded hole 41. A first limiting screw 5 is internally threaded into the second positioning threaded hole 41. The end of the first limiting screw 5 passes through the second positioning threaded hole 41 and is inserted into one of the first positioning holes 21. The lock cylinder body 1 also has a second drive shaft 6 extending outward to the outside of the door. The second drive shaft 6 and the lever 3 are controlled by an electronically controlled clutch assembly to ensure synchronous rotation. An outer handle 7 is threadedly connected to the second drive shaft 6. An open retaining ring 8 is engaged at the meshing overlap of the outer handle 7 and the second drive shaft 6. The meshing length of the threaded connection between the outer handle 7 and the second drive shaft 6 is less than or equal to 10 mm.
[0007] Preferably, the lock cylinder further includes at least one first extension member 9, which is inserted through the first transmission shaft 2 between the lock cylinder body 1 and the inner handle 4. The first extension member 9 has several length specifications, and the first extension member 9 is fixedly connected to the lock cylinder body 1 by a second locking screw 10. The outer contour of the first extension member 9 is the same as the outer contour of the lock cylinder body 1.
[0008] Preferably, the lock cylinder body 1 has a first positioning groove 11 on one end face near the inner side of the door, and the first extension member 9 has a first positioning protrusion 91 on the end face near the lock cylinder body 1. The first positioning groove 11 and the first positioning protrusion 91 can form a concave-convex fit to prevent the lock cylinder body 1 and the first extension member 9 from rotating relative to each other. The end face of the first extension member 9 away from the lock cylinder body 1 also has a second positioning groove 92. The second positioning groove 92 can form a concave-convex fit with the first positioning protrusion 91 of the other first extension member 9 to prevent the two first extension members 9 from rotating relative to each other.
[0009] Preferably, the first extension member 9 is provided with a first through hole 93 through which one end of the second locking screw 10 passes, and the end face of the lock cylinder body 1 near the inner side of the door is provided with a third locking thread hole 12 through which the second locking screw 10 passes through the first through hole 93 and is threaded onto it.
[0010] Preferably, it also includes a first extension shaft 13, which has the same diameter as the first transmission shaft 2 and is coaxially arranged. The end face of the first extension shaft 13 is provided with a second positioning protrusion 131, and the end face of the first transmission shaft 2 near the first extension shaft 13 is provided with a third positioning groove 22. The second positioning protrusion 131 and the third positioning groove 22 can form a concave-convex fit to prevent the first transmission shaft 2 and the first extension shaft 13 from rotating relative to each other. The end face of the first transmission shaft 2 is also provided with a fourth locking threaded hole 23. The first extension shaft 13 is provided with a second through hole 132 that passes through the front and back. The first transmission shaft 2 and the first extension shaft 13 are fixedly connected by a third locking screw 14. One end of the third locking screw 14 passes through the second through hole 132 and is threadedly connected to the fourth locking threaded hole 23. The first extension shaft 13 is also provided with a plurality of first positioning holes 21 that extend radially and are evenly distributed axially.
[0011] Preferably, the lock cylinder further includes a second extension shaft 15 and at least one second extension member 16. The second extension shaft 15 is connected between the outer handle 7 and the second drive shaft 6. One end of the second extension shaft 15 is threaded to the second drive shaft 6 and the other end is threaded to the outer handle 7. The engagement length of the threaded connection between the second extension shaft 15 and the outer handle 7 is less than or equal to 10 mm. An open retaining ring 8 is provided at the engagement overlap of the second extension shaft 15 and the engagement overlap of the second extension shaft 15 and the outer handle 7. The second extension member 16 passes through the second extension shaft 15. The second extension member 16 is fixedly connected to the lock cylinder body 1 by a fourth locking screw 17. The outer contour of the second extension member 16 is the same as the outer contour of the lock cylinder body 1. The second extension member 16 has several length specifications, and the second extension shaft 15 also has several length specifications.
[0012] Preferably, the second extension shaft 15 has two slots 151 at the end that is threaded to the outer handle 7, into which the opening retaining ring 8 can be inserted.
[0013] Preferably, the lock cylinder body 1 has a fourth positioning groove 18 on one end face near the outside of the door, and the second extension member 16 has a third positioning protrusion 161 on the end face near the lock cylinder body 1. The fourth positioning groove 18 and the third positioning protrusion 161 can form a concave-convex fit to prevent the lock cylinder body 1 and the second extension member 16 from rotating relative to each other. The end face of the second extension member 16 away from the lock cylinder body 1 also has a fifth positioning groove 162. The fifth positioning groove 162 can form a concave-convex fit with the third positioning protrusion 161 of the other second extension member 16 to prevent the two second extension members 16 from rotating relative to each other.
[0014] Preferably, the second extension member 16 is provided with a third through hole 163 through which one end of the fourth locking screw 17 passes, and the end face of the lock cylinder body 1 near the outside of the door is provided with a fifth locking thread hole 19 through which the fourth locking screw 17 passes through the third through hole 163 and is threaded onto it.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] In this design, the distance between the lock cylinder body and the inner handle can be quickly adjusted by aligning the second positioning threaded hole on the inner handle with the different first positioning holes on the first drive shaft, and then fixing them with the first limiting screw. The distance between the lock cylinder body and the outer handle can be adjusted using their existing threaded connection structure by adding extension shafts of different lengths between them. Thus, the overall length of the lock cylinder can be increased without disassembling the lock cylinder body, avoiding the risks associated with disassembling it and significantly reducing the time required to adjust the lock cylinder length. Furthermore, because the distance between the inner and outer handles and the lock cylinder body can be adjusted independently, the adjustment range is more flexible than traditional methods that simply lengthen the entire lock cylinder body. This allows it to adapt to door thicknesses and different eccentric distances. Attached Figure Description
[0017] Figure 1 This is one of the schematic diagrams of the lock cylinder in this case.
[0018] Figure 2 This is the second schematic diagram of the lock cylinder in this case, which shows a section of the inner handle and the outer handle.
[0019] Figure 3 This is the case Figure 1 An exploded view of a lock cylinder embodiment.
[0020] Figure 4 This is the third schematic diagram of the lock cylinder in this case. A 5mm long first extension is installed between the inner handle and the main body of the lock cylinder, and a 5mm long second extension is also installed between the outer handle and the main body of the lock cylinder.
[0021] Figure 5 This is the case Figure 4 A cross-sectional schematic diagram of a lock cylinder embodiment.
[0022] Figure 6 This is the case Figure 4 One of the exploded schematic diagrams of a lock cylinder embodiment.
[0023] Figure 7 This is the case Figure 4 Exploded view of a lock cylinder embodiment (second example).
[0024] Figure 8 This is the fourth schematic diagram of the lock cylinder in this case. A first extension piece with a length of 5mm and a length of 10mm is added between the inner handle and the main body of the lock cylinder. A second extension piece with a length of 5mm and a length of 10mm is also added between the outer handle and the main body of the lock cylinder.
[0025] Figure 9 This is the case Figure 8 A cross-sectional schematic diagram of a lock cylinder embodiment.
[0026] Figure 10 This is the case Figure 8 One of the exploded schematic diagrams of a lock cylinder embodiment.
[0027] Figure 11 This is the case Figure 8 Exploded view of a lock cylinder embodiment (second example).
[0028] Figure 12 This is the fifth schematic diagram of the lock cylinder in this case. A first extension piece with a length of 10mm and a length of 20mm is installed between the inner handle and the main body of the lock cylinder. A second extension piece with a length of 10mm and a length of 20mm is also installed between the outer handle and the main body of the lock cylinder.
[0029] Figure 13 This is the case Figure 12 A cross-sectional schematic diagram of a lock cylinder embodiment.
[0030] Figure 14 This is the case Figure 12 One of the exploded schematic diagrams of a lock cylinder embodiment.
[0031] Figure 15 This is the case Figure 12 Exploded view of a lock cylinder embodiment (second example).
[0032] Figure 16 This is a schematic diagram of the first extension component in the three specifications of this case.
[0033] Figure 17 This is a schematic diagram of the second extension component in three different specifications in this case.
[0034] Figure 18 This is a schematic diagram of the second extension shaft in three different specifications for this case. Detailed Implementation
[0035] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art:
[0036] like Figures 1 to 3As shown, a lock cylinder with extendable ends includes a lock cylinder body 1. The lock cylinder body 1 has a first drive shaft 2 extending inward to the inside of the door. The first drive shaft 2 is connected to a lever 3 and rotates synchronously. The first drive shaft 2 has several first positioning holes 21 that extend radially and are evenly distributed axially. An inner handle 4 is sleeved on the first drive shaft 2. The side wall of the inner handle 4 has a second positioning threaded hole 41. A first limiting screw 5 is internally threaded into the second positioning threaded hole 41. The end of the first limiting screw 5 passes through the second positioning threaded hole 41 and is inserted into one of the first positioning holes 21. The lock cylinder body 1 also has a second drive shaft 6 extending outward to the outside of the door. The second drive shaft 6 and the lever 3 are controlled by an electronically controlled clutch assembly to ensure synchronous rotation. An outer handle 7 is threadedly connected to the second drive shaft 6. An open retaining ring 8 is engaged at the overlapping part of the outer handle 7 and the second drive shaft 6. The engagement length of the threaded connection between the outer handle 7 and the second drive shaft 6 is less than or equal to 10 mm.
[0037] Furthermore, the first positioning hole 21 can also be a threaded hole, and the end of the first limiting screw 5 is also threadedly connected to the first positioning hole 21.
[0038] As described above, the lock cylinder in this case includes a lock cylinder body 1. The lock cylinder body 1 has a first transmission shaft 2 and a second transmission shaft 6 at both ends for driving the lever 3 to rotate. The first transmission shaft 2 is connected to the inner handle 4 and the second transmission shaft 6 is connected to the outer handle 7.
[0039] The first drive shaft 2 has several first positioning holes 21, and the inner handle 4 has second positioning threaded holes 41. By aligning the first positioning holes 21 and the second positioning threaded holes 41 and tightening the first limiting screw 5 so that its end is inserted into the first positioning hole 21, the inner handle 4 and the first drive shaft 2 can be fixedly connected together. This allows the user to drive the first drive shaft 2 to rotate by turning the inner handle 4. Simultaneously, since the first drive shaft 2 has several first positioning holes 21 evenly distributed axially, any one of these holes can cooperate with the first limiting screw 5 and the second positioning threaded hole 41 to fix the first drive shaft 2 and the inner handle 4 together. Therefore, for doors of different thicknesses, the inner handle 4 can be fixed into different first positioning holes 21, thereby adjusting the distance between the lock cylinder body 1 and the inner handle 4, and achieving length adjustment of the lock cylinder inwards.
[0040] The second drive shaft 6 is threadedly connected to the outer handle 7, and an open retaining ring 8 is fitted at the meshing overlap of the second drive shaft 6 and the outer handle 7. This prevents the second drive shaft 6 from loosening after the threaded connection is complete, and also forces the second drive shaft 6 and the outer handle 7 to rotate synchronously when the user rotates the outer handle 7. The meshing length of the threaded connection between the outer handle 7 and the second drive shaft 6 is less than or equal to 10mm, which prevents excessive rotation during installation of the outer handle 7 from causing damage to the internal cables. When it is necessary to adjust the distance between the lock cylinder body 1 and the outer handle 7, an extension shaft can be added between the second drive shaft 6 and the outer handle 7. The extension shaft utilizes the existing threaded structure of the second drive shaft 6 and the outer handle 7, with one end threaded to the second drive shaft 6 and the other end threaded to the outer handle 7. By adding extension shafts of different lengths, the distance between the second drive shaft 6 and the outer handle 7 can be easily adjusted, achieving length adjustment of the lock cylinder in the outward direction.
[0041] As described above, the lock cylinder in this case allows for quick adjustment of the distance between the lock cylinder body 1 and the inner handle 4 by aligning the second positioning threaded hole 41 on the inner handle 4 with the different first positioning holes 21 on the first transmission shaft 2, and then fixing them with the first limiting screw 5. The distance between the lock cylinder body 1 and the outer handle 7 can be adjusted using their existing threaded connection structure by adding extension shafts of different lengths between them. Thus, the lock cylinder in this case can be lengthened without disassembling the lock cylinder body 1, avoiding the risks associated with disassembling the lock cylinder and significantly reducing the time required to adjust its length. Furthermore, since the lock cylinder in this case allows for individual adjustment of the distance between the inner and outer handles and the lock cylinder body 1, the adjustment range is more flexible than the traditional method of lengthening the entire lock cylinder body 1. It can accommodate door thicknesses and different eccentric distances.
[0042] Specifically, the outer handle 7 is equipped with a battery and a main control board. The electronic clutch assembly is located in the lock cylinder body 1. The main control board in the outer handle 7 and the electronic clutch assembly are electrically connected by a cable. The cable is led out from the end of the outer handle 7 and passes through the second drive shaft 6 to connect with the electronic clutch assembly.
[0043] like Figures 4 to 16As shown, preferably, the lock cylinder further includes at least one first extension member 9. The first extension member 9 is inserted through the first transmission shaft 2 and located between the lock cylinder body 1 and the inner handle 4. The first extension member 9 has several length specifications. The first extension member 9 is fixedly connected to the lock cylinder body 1 by a second locking screw 10. The outer contour of the first extension member 9 is the same as the outer contour of the lock cylinder body 1. In this way, after adjusting the distance between the lock cylinder body 1 and the inner handle 4, the first extension member 9 can be sleeved on the first transmission shaft 2 between the lock cylinder body 1 and the inner handle 4 to extend the contour of the lock cylinder body 1. At the same time, it can also fill the space between the lock cylinder body 1 and the inner handle 4, so that the lock cylinder can better fit the opening on the door body. This avoids the first transmission shaft 2 from shaking inside the door body when the user turns the inner handle 4 after the extension, which would affect the stability and life of the lock cylinder.
[0044] Specifically, the length A of the first extension member 9 has three specifications: 5mm, 10mm, and 20mm. Correspondingly, the center distance between adjacent first positioning holes 21 is 5mm.
[0045] like Figures 4 to 16 As shown, preferably, the lock cylinder body 1 has a first positioning groove 11 on one end face near the inner side of the door, and the first extension member 9 has a first positioning protrusion 91 on one end face near the lock cylinder body 1. The first positioning groove 11 and the first positioning protrusion 91 can form a concave-convex fit to prevent relative rotation between the lock cylinder body 1 and the first extension member 9. The end face of the first extension member 9 away from the lock cylinder body 1 also has a second positioning groove 92. The second positioning groove 92 can form a concave-convex fit with the first positioning protrusion 91 of the other first extension member 9 to prevent the two first extension members 9 from intersecting. Regarding rotation, the first positioning groove 11 and the first positioning protrusion 91 ensure that after the first extension 9 is installed, there will be no relative rotational misalignment between the first extension 9 and the lock cylinder body 1. At the same time, if multiple first extensions 9 are installed, the first positioning protrusion 91 and the second positioning groove 92 can also cooperate to ensure that there will be no relative rotational misalignment between the front and rear first extensions 9. As described above, by setting the first positioning groove 11, the first positioning protrusion 91 and the second positioning groove 92 to cooperate with each other, it can be ensured that the installed first extension 9 will not rotate relative to the lock cylinder body 1 and cause misalignment.
[0046] like Figures 4 to 16 As shown, preferably, the first extension member 9 is provided with a first through hole 93 through which one end of the second locking screw 10 passes, and the end face of the lock cylinder body 1 near the inner side of the door is provided with a third locking thread hole 12 for the second locking screw 10 to pass through the first through hole 93 and then be threaded onto it. In this way, by passing one end of the second locking screw 10 through the first through hole 93 and then threading it onto the third locking thread hole 12, the first extension member 9 can be locked and fixed onto the lock cylinder body 1 by the second locking screw 10.
[0047] Specifically, the third locking threaded hole 12 is disposed in the first positioning groove 11, and the first through hole 93 penetrates the first positioning protrusion 91 and the second positioning groove 92.
[0048] Furthermore, the length of the second locking screw 10 can be selected according to the appropriate length specification based on the total length of the added first extension 9.
[0049] like Figures 12 to 15 As shown, preferably, it also includes a first extension shaft 13, which has the same diameter as the first transmission shaft 2 and is coaxially arranged. The end face of the first extension shaft 13 is provided with a second positioning protrusion 131, and the end face of the first transmission shaft 2 near the first extension shaft 13 is provided with a third positioning groove 22. The second positioning protrusion 131 and the third positioning groove 22 can form a concave-convex fit to prevent the first transmission shaft 2 and the first extension shaft 13 from rotating relative to each other. The end face of the first transmission shaft 2 is also provided with a fourth locking threaded hole 23. The first extension shaft 13 is provided with a second through hole 132 that passes through the front and back. The first transmission shaft 2 and the first extension shaft 13 are fixedly connected by a third locking screw 14. One end of the third locking screw 14 passes through the second through hole 132 and is threadedly connected to the fourth locking threaded hole 23. The first extension shaft 13 is also provided with a plurality of first positioning holes 21 that extend radially and are evenly distributed axially.
[0050] Specifically, the first extension member 9 can also be mounted on the first extension shaft 13.
[0051] As described above, when the first extension member 9 installed between the lock cylinder body 1 and the inner handle 4 is too large and does not extend beyond the first drive shaft 2, the lock cylinder in this case can still connect to the first extension shaft 13 on the first drive shaft 2. The first extension shaft 13 is provided with a second through hole 132, and the corresponding end face of the first drive shaft 2 is also provided with a fourth locking thread hole 23. In this way, one end of the third locking screw 14 passes through the second through hole 132 and is threadedly connected to the fourth locking thread hole 23, which can fix the first drive shaft 2 and the first extension shaft 13 coaxially together. At the same time, the end face of the first drive shaft 2 is also provided with a third positioning groove 22, and correspondingly, the end face of the first extension shaft 13 is provided with a second positioning protrusion 131. The third positioning groove 22 and the second positioning protrusion 131 form a concave-convex fit, which can ensure that the first extension shaft 13 and the first drive shaft 2 will not rotate relative to each other after being fixed together, thereby ensuring that the transmission of torque will not be interrupted. Furthermore, the first extension shaft 13 is also provided with first positioning holes 21 evenly distributed along the axial direction. Thus, after the first extension member 9 has passed the first drive shaft 2, the inner handle 4 can be fixed to the first extension shaft 13 in the same way by connecting the first extension shaft 13, thereby achieving a greater adjustment distance.
[0052] like Figures 4 to 18 As shown, preferably, the lock cylinder further includes a second extension shaft 15 and at least one second extension member 16. The second extension shaft 15 is connected between the outer handle 7 and the second transmission shaft 6. One end of the second extension shaft 15 is threadedly connected to the second transmission shaft 6, and the other end is threadedly connected to the outer handle 7. The engagement length of the threaded connection between the second extension shaft 15 and the outer handle 7 is less than or equal to 10 mm. An open retaining ring 8 is provided at the engagement overlap of the second extension shaft 15 and the engagement overlap of the second extension shaft 15 and the outer handle 7. The second extension member 16 passes through the second extension shaft 15. The second extension member 16 is fixedly connected to the lock cylinder body 1 by a fourth locking screw 17. The outer contour of the second extension member 16 is the same as the outer contour of the lock cylinder body 1. The second extension member 16 has several length specifications, and the second extension shaft 15 also has several length specifications.
[0053] As described above, by connecting a second extension shaft 15 between the outer handle 7 and the second drive shaft 6, the distance between the outer handle 7 and the lock cylinder body 1 can be increased. Furthermore, the connection between the second extension shaft 15 and both the outer handle 7 and the second drive shaft 6 can utilize the existing threaded connection structure; that is, one end of the second extension shaft 15 is threaded to the outer handle 7, and the other end is also threaded to the second drive shaft 6. Correspondingly, open retaining rings 8 are provided at the overlapping engagement points of the second extension shaft 15 with the outer handle 7 and the second drive shaft 6 to prevent loosening and to force the threaded connections to rotate synchronously. Thus, the distance between the outer handle 7 and the lock cylinder body 1 can be adjusted by connecting the second extension piece 16. Similarly, the engagement length of the threaded connection between the second extension shaft 15 and the outer handle 7 is less than or equal to 10mm to avoid damage caused by excessive cable twisting.
[0054] In addition, a second extension member 16 is also provided on the second extension shaft 15 between the outer handle 7 and the second drive shaft 6. After adjusting the distance between the lock cylinder body 1 and the outer handle 7, the second extension member 16 can be fitted on the second extension shaft 15 between the lock cylinder body 1 and the outer handle 7 to extend the outline of the lock cylinder body 1. At the same time, it can also fill the space between the lock cylinder body 1 and the outer handle 7, so that the lock cylinder can better fit the opening on the door body. This avoids the second drive shaft 6 and the second extension shaft 15 from shaking inside the door body when the user turns the outer handle 7 after the extension, which would affect the stability and life of the lock cylinder.
[0055] Specifically, the length B of the second extension member 16 has three specifications: 5mm, 10mm, and 20mm, and the length C of the second extension shaft 15 has three specifications: 17mm, 27mm, and 37mm.
[0056] like Figure 9 , Figure 13 and Figure 18As shown, preferably, the second extension shaft 15 has two slots 151 at the end that is threaded to the outer handle 7, into which the opening retaining ring 8 can be inserted.
[0057] As described above, the second extension shaft 15 is provided with two slots 151 into which the opening retaining ring 8 can be inserted. Thus, when using the same second extension shaft 15, the outer handle 7 can be rotated to different slots 151 for fixation, thereby further adjusting the distance between the outer handle 7 and the lock cylinder body 1 by adjusting the engagement distance between the outer handle 7 and the second extension shaft 15.
[0058] like Figures 4 to 15 Preferably, the lock cylinder body 1 has a fourth positioning groove 18 on one end face near the outer side of the door, and the second extension member 16 has a third positioning protrusion 161 on one end face near the lock cylinder body 1. The fourth positioning groove 18 and the third positioning protrusion 161 can form a concave-convex fit to prevent the lock cylinder body 1 and the second extension member 16 from rotating relative to each other. The second extension member 16 also has a fifth positioning groove 162 on the end face away from the lock cylinder body 1. The fifth positioning groove 162 can form a concave-convex fit with the third positioning protrusion 161 of the other second extension member 16 to prevent the two second extension members 16 from rotating relative to each other. By rotating, the fourth positioning groove 18 and the third positioning protrusion 161 can ensure that after the second extension 16 is installed, there will be no relative rotational misalignment between the second extension 16 and the lock cylinder body 1. At the same time, if multiple second extensions 16 are installed, the third positioning protrusion 161 and the fifth positioning groove 162 can also cooperate to ensure that there will be no relative rotational misalignment between the front and rear second extensions 16. As described above, by setting the fourth positioning groove 18, the third positioning protrusion 161 and the fifth positioning groove 162 to cooperate with each other, it can be ensured that the installed second extension 16 will not rotate relative to the lock cylinder body 1 and cause misalignment.
[0059] like Figures 4 to 15 Preferably, the second extension member 16 is provided with a third through hole 163 through which one end of the fourth locking screw 17 passes. The end face of the lock cylinder body 1 near the outside of the door is provided with a fifth locking thread hole 19 through which the fourth locking screw 17 passes through the third through hole 163 and is threaded to it. In this way, by passing one end of the fourth locking screw 17 through the third through hole 163 and then threading it to the fifth locking thread hole 19, the second extension member 16 can be locked and fixed to the lock cylinder body 1 by the fourth locking screw 17.
[0060] Specifically, the fifth locking threaded hole 19 is disposed in the fourth positioning groove 18, and the third through hole 163 penetrates the third positioning protrusion 161 and the fifth positioning groove 162.
[0061] As stated above, this case protects a lock cylinder that can be extended at both ends, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.
Claims
1. A lock cylinder with extendable ends, characterized in that... The lock includes a lock cylinder body (1), which has a first drive shaft (2) extending inward toward the door. The first drive shaft (2) is connected to a lever (3) and rotates synchronously. The first drive shaft (2) has several first positioning holes (21) that extend radially and are evenly distributed axially. An inner handle (4) is fitted on the first drive shaft (2). The side wall of the inner handle (4) has a second positioning threaded hole (41). A first limiting screw (5) is internally threaded into the second positioning threaded hole (41). The end of the first limiting screw (5) passes through the first positioning threaded hole (41). Two positioning threaded holes (41) are inserted into one of the first positioning holes (21). The lock cylinder body (1) is also provided with a second drive shaft (6) extending outward from the door. The second drive shaft (6) and the lever (3) are controlled by an electronic clutch assembly to ensure that they rotate synchronously. An outer handle (7) is threadedly connected to the second drive shaft (6). An open retaining ring (8) is provided at the meshing overlap of the outer handle (7) and the second drive shaft (6). The meshing length of the threaded connection between the outer handle (7) and the second drive shaft (6) is less than or equal to 10 mm.
2. A lock cylinder with extendable ends according to claim 1, characterized in that... It also includes at least one first extension member (9), which is inserted through the first drive shaft (2) between the lock cylinder body (1) and the inner handle (4). The first extension member (9) has several length specifications. The first extension member (9) is fixedly connected to the lock cylinder body (1) by a second locking screw (10). The outer contour of the first extension member (9) is the same as the outer contour of the lock cylinder body (1).
3. A lock cylinder with extendable ends according to claim 2, characterized in that... The lock cylinder body (1) has a first positioning groove (11) on one end face near the inside of the door. The first extension member (9) has a first positioning protrusion (91) on the end face near the lock cylinder body (1). The first positioning groove (11) and the first positioning protrusion (91) can form a concave-convex fit to prevent the lock cylinder body (1) and the first extension member (9) from rotating relative to each other. The end face of the first extension member (9) away from the lock cylinder body (1) also has a second positioning groove (92). The second positioning groove (92) can form a concave-convex fit with the first positioning protrusion (91) of the other first extension member (9) to prevent the two first extension members (9) from rotating relative to each other.
4. A lock cylinder with extendable ends according to any one of claims 2 or 3, characterized in that... The first extension member (9) is provided with a first through hole (93) through which one end of the second locking screw (10) passes. The lock cylinder body (1) is provided with a third locking thread hole (12) on one end face near the inside of the door, through which the second locking screw (10) passes through the first through hole (93) and is threaded onto it.
5. A lock cylinder with extendable ends according to any one of claims 1 or 2, characterized in that... It also includes a first extension shaft (13), which has the same shaft diameter as the first transmission shaft (2) and is coaxially arranged. The end face of the first extension shaft (13) is provided with a second positioning protrusion (131). The end face of the first transmission shaft (2) near the first extension shaft (13) is provided with a third positioning groove (22). The second positioning protrusion (131) and the third positioning groove (22) can form a concave-convex fit to prevent the first transmission shaft (2) and the first extension shaft (13) from rotating relative to each other. The end face of the first transmission shaft (2) is also provided with a fourth locking threaded hole (23). The first extension shaft (13) is provided with a second through hole (132) that passes through the front and back. The first transmission shaft (2) and the first extension shaft (13) are fixedly connected by a third locking screw (14). One end of the third locking screw (14) passes through the second through hole (132) and is threadedly connected to the fourth locking threaded hole (23). The first extension shaft (13) is also provided with a plurality of first positioning holes (21) that extend radially and are evenly distributed axially.
6. A lock cylinder with extendable ends according to claim 1, characterized in that... It also includes a second extension shaft (15) and at least one second extension member (16). The second extension shaft (15) is connected between the outer handle (7) and the second drive shaft (6). One end of the second extension shaft (15) is threaded to the second drive shaft (6) and the other end is threaded to the outer handle (7). The engagement length of the threaded connection between the second extension shaft (15) and the outer handle (7) is less than or equal to 10 mm. An open retaining ring (8) is provided at the engagement overlap of the second extension shaft (15) and the second drive shaft (6) and the engagement overlap of the second extension shaft (15) and the outer handle (7). The second extension member (16) is passed through the second extension shaft (15). The second extension member (16) is fixedly connected to the lock cylinder body (1) by a fourth locking screw (17). The outer contour of the second extension member (16) is the same as the outer contour of the lock cylinder body (1). The second extension member (16) has several length specifications, and the second extension shaft (15) also has several length specifications.
7. A lock cylinder with extendable ends according to claim 6, characterized in that... The second extension shaft (15) has two slots (151) at the end that is threaded to the outer handle (7) for the retaining ring (8) to be inserted.
8. A lock cylinder with extendable ends according to claim 6, characterized in that... The lock cylinder body (1) has a fourth positioning groove (18) on one end face near the outside of the door. The second extension (16) has a third positioning protrusion (161) on the end face near the lock cylinder body (1). The fourth positioning groove (18) and the third positioning protrusion (161) can form a concave-convex fit to prevent the lock cylinder body (1) and the second extension (16) from rotating relative to each other. The second extension (16) also has a fifth positioning groove (162) on the end face away from the lock cylinder body (1). The fifth positioning groove (162) can form a concave-convex fit with the third positioning protrusion (161) of the other second extension (16) to prevent the two second extensions (16) from rotating relative to each other.
9. A lock cylinder with extendable ends according to claim 6, characterized in that... The second extension (16) is provided with a third through hole (163) through which one end of the fourth locking screw (17) passes. The lock cylinder body (1) is provided with a fifth locking thread hole (19) on one end face near the outside of the door, through which the fourth locking screw (17) passes through the third through hole (163) and is threaded onto it.