Lock cylinder with two ends capable of being lengthened

Abstract

The lock cylinder comprises a lock cylinder body, the lock cylinder body is provided with a first transmission shaft extending towards the inner side of a door, the first transmission shaft and a shifting pick are connected and rotate synchronously, the first transmission shaft is provided with a plurality of first positioning holes which extend in the radial direction and are evenly distributed in the axial direction, and the first transmission shaft is sleeved with an inner handle; a second positioning threaded hole is formed in the side wall of the inner handle, a first limiting screw is in threaded connection with the interior of the second positioning threaded hole, the tail end of the first limiting screw penetrates through the second positioning threaded hole to be inserted into one of the first positioning holes, and a second transmission shaft extending towards the outer side of the door is further arranged on the lock cylinder body; whether the second transmission shaft and the shifting pick rotate synchronously or not is controlled through an electric control clutch assembly, an outer handle is connected to the second transmission shaft in a threaded mode, a split washer is clamped to the meshing overlapping portion of the outer handle and the second transmission shaft, and the meshing length of threaded connection between the outer handle and the second transmission shaft is smaller than or equal to 10 mm.

Description

Technical Field

[0001] The present invention relates to a lock core, in particular to a lock core with extendable ends at both sides. Background Art

[0002] Currently, in order to adapt to door bodies of different thicknesses and avoid producing multiple lock cores of different lengths simultaneously, a lock core with adjustable length needs to be designed. For example, a lengthenable lock core structure disclosed in a Chinese invention patent application with publication number CN113685090A. This type of structure disassembles the lock core body into multiple parts and lengthens the entire lock core body by adding connecting parts during assembly, thereby increasing the length of the entire lock core to adapt to thicker door bodies. However, since this type of solution requires disassembling the lock core body to adjust the length, and the lock core body is the most precise part of the entire lock core structure, incorrect installation of a certain part may even cause the lock core to malfunction. This results in extremely high difficulty and long time consumption for disassembling and assembling the lock core body, and the actual operation process of adjusting the length of the lock core is not convenient.

[0003] Therefore, how to overcome the above-mentioned defects has become an important issue that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] The present invention overcomes the above-mentioned technical deficiencies and provides a lock core with extendable ends at both sides.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A lock core with extendable ends at both sides includes a lock core body 1. The lock core body 1 is provided with a first transmission shaft 2 extending towards the inner side of the door. The first transmission shaft 2 is connected to a pick 3 and rotates synchronously. The first transmission shaft 2 is provided with a plurality of first positioning holes 21 extending radially and evenly distributed axially. An inner handle 4 is sleeved on the first transmission shaft 2. A second positioning threaded hole 41 is provided on the side wall of the inner handle 4. A first limit screw 5 is threadedly connected in the second positioning threaded hole 41. The end of the first limit screw 5 passes through the second positioning threaded hole 41 and inserts into one of the first positioning holes 21. The lock core body 1 is further provided with a second transmission shaft 6 extending towards the outer side of the door. Whether the second transmission shaft 6 and the pick 3 rotate synchronously is controlled by an electric control clutch assembly. An outer handle 7 is threadedly connected to the second transmission shaft 6. A snap ring 8 is clamped at the overlapping part of the meshing between the outer handle 7 and the second transmission shaft 6. The meshing length of the threaded connection between the outer handle 7 and the second transmission shaft 6 is less than or equal to 10 mm.

[0007] Preferably, the lock core further includes at least one first extension member 9 which is disposed on the first transmission shaft 2 between the lock core 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 core body 1 by a second locking screw 10, and the outer contour of the first extension member 9 is the same as that of the lock core body 1.

[0008] Preferably, a first positioning groove 11 is provided on the end face of the lock core body 1 near the inner side of the door, and a first positioning protrusion 91 is provided on the end face of the first extension member 9 close to the lock core 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 core body 1 and the first extension member 9. A second positioning groove 92 is further provided on the end face of the first extension member 9 away from the lock core body 1, and the second positioning groove 92 can form a concave-convex fit with the first positioning protrusion 91 of another first extension member 9 to prevent relative rotation between the two first extension members 9.

[0009] Preferably, a first through hole 93 for one end of the second locking screw 10 to pass through is provided on the first extension member 9, and a third locking threaded hole 12 for the second locking screw 10 to pass through the first through hole 93 and be threadedly connected thereto is provided on the end face of the lock core body 1 near the inner side of the door.

[0010] Preferably, a first extension shaft 13 is further included. The first extension shaft 13 has the same shaft diameter as the first transmission shaft 2 and is coaxially arranged therewith. A second positioning protrusion 131 is provided on the end face of the first extension shaft 13, and a third positioning groove 22 is provided on the end face of the first transmission shaft 2 close to the first extension shaft 13. The second positioning protrusion 131 and the third positioning groove 22 can form a concave-convex fit to prevent relative rotation between the first transmission shaft 2 and the first extension shaft 13. A fourth locking threaded hole 23 is further provided on the end face of the first transmission shaft 2. A second through hole 132 is provided through the front and back on the first extension shaft 13. 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. A number of first positioning holes 21 extending radially and evenly distributed axially are also provided on the first extension shaft 13.

[0011] Preferably, the lock core 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 meshing length of the threaded connection between the second extension shaft 15 and the outer handle 7 is less than or equal to 10 mm. Snap rings 8 are provided at the meshing overlap of the second extension shaft 15 and the second transmission shaft 6 and at the meshing overlap of the second extension shaft 15 and the outer handle 7. The second extension member 16 is sleeved on the second extension shaft 15. The second extension member 16 and the lock core body 1 are fixedly connected by a fourth locking screw 17. The outer contour of the second extension member 16 is the same as that of the lock core body 1. The second extension member 16 has several length specifications, and the second extension shaft 15 also has several length specifications.

[0012] Preferably, two notches 151 for the snap ring 8 to be inserted therein are provided at one end of the second extension shaft 15 that is threadedly connected to the outer handle 7.

[0013] Preferably, a fourth positioning groove 18 is provided on the end face of the lock core body 1 near the outer side of the door. A third positioning protrusion 161 is provided on the end face of the second extension member 16 near the lock core body 1. The fourth positioning groove 18 and the third positioning protrusion 161 can form a concave-convex fit to prevent relative rotation between the lock core body 1 and the second extension member 16. A fifth positioning groove 162 is further provided on the end face of the second extension member 16 away from the lock core body 1. The fifth positioning groove 162 can form a concave-convex fit with the third positioning protrusion 161 of another second extension member 16 to prevent relative rotation between the two second extension members 16.

[0014] Preferably, a third through hole 163 for one end of the fourth locking screw 17 to pass through is provided on the second extension member 16. A fifth locking threaded hole 19 for the fourth locking screw 17 to pass through the third through hole 163 and be threadedly connected thereto is provided on the end face of the lock core body 1 near the outer side of the door.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this case, the lock core can quickly adjust the distance between the lock core body and the inner handle by aligning the second positioning threaded hole on the inner handle with different first positioning holes on the first transmission shaft and then fixing the two with the first limit screw. The distance between the lock core body and the outer handle can be adjusted by using the original threaded connection structure between the two and installing extension shafts of different lengths between the lock core body and the outer handle. In this way, the overall length of the lock core in this case can be lengthened without disassembling the lock core body, thus avoiding the risks brought by disassembling the lock core and significantly reducing the time required to adjust the length of the lock core. In addition, since the lock core in this case can separately adjust the distances between the inner and outer handles and the lock core body, the adjustment range is more flexible than the traditional solution of lengthening the lock core body as a whole. It can not only adapt to door bodies of different thicknesses but also different eccentric distances. Brief Description of the Drawings

[0017] Figure 1 is one of the schematic diagrams of the lock core in this case.

[0018] Figure 2 is the second schematic diagram of the lock core in this case, in which part of the inner handle and the outer handle are sectioned.

[0019] Figure 3 is this case Figure 1 exploded schematic diagram of the lock core embodiment.

[0020] Figure 4 is the third schematic diagram of the lock core in this case, in which a 5-mm-long first extension piece is installed between the inner handle and the lock core body, and a 5-mm-long second extension piece is also installed between the outer handle and the lock core body.

[0021] Figure 5 is this case Figure 4 cross-sectional schematic diagram of the lock core embodiment.

[0022] Figure 6 is this case Figure 4 exploded schematic diagram of the lock core embodiment.

[0023] Figure 7 is this case Figure 4 exploded schematic diagram of the lock core embodiment.

[0024] Figure 8 is the fourth schematic diagram of the lock core in this case, in which a 5-mm-long and a 10-mm-long first extension piece are installed between the inner handle and the lock core body, and a 5-mm-long and a 10-mm-long second extension piece are also installed between the outer handle and the lock core body.

[0025] Figure 9 is this case Figure 8 cross-sectional schematic diagram of the lock core embodiment.

[0026] Figure 10 is one of the exploded views of the lock core embodiment in this case. Figure 8

[0027] Figure 11 is Figure 8 the second exploded view of the lock core embodiment in this case.

[0028] Figure 12 Figure 5 is a schematic view of the lock core in this case. A first extension piece with a length of 10 mm and a length of 20 mm is installed between the inner handle and the lock core body, and a second extension piece with a length of 10 mm and a length of 20 mm is also installed between the outer handle and the lock core body.

[0029] Figure 13 is Figure 12 the cross-sectional schematic view of the lock core embodiment in this case.

[0030] Figure 14 is Figure 12 one of the exploded views of the lock core embodiment in this case.

[0031] Figure 15 is Figure 12 the second exploded view of the lock core embodiment in this case.

[0032] Figure 16 Figure 37 is a schematic view of the first extension piece of three specifications in this case.

[0033] Figure 17 Figure 41 is a schematic view of the second extension piece of three specifications in this case.

[0034] Figure 18 Figure 45 is a schematic view of the second extension shaft of three specifications in this case. Detailed implementation manners

[0035] The features of the present invention and other related features are further described in detail through the following embodiments for the understanding of those skilled in the same industry:

[0036] As Figures 1 to 3 ​As shown in the figure, a lock core with extendable ends includes a lock core body 1. The lock core body 1 is provided with a first transmission shaft 2 extending towards the inner side of the door. The first transmission shaft 2 is connected to a pick 3 and rotates synchronously. The first transmission shaft 2 is provided with a number of first positioning holes 21 extending radially and evenly distributed axially. An inner handle 4 is sleeved on the first transmission shaft 2. A second positioning threaded hole 41 is provided on the side wall of the inner handle 4. A first limit screw 5 is threadedly connected in the second positioning threaded hole 41. The end of the first limit screw 5 passes through the second positioning threaded hole 41 and inserts into one of the first positioning holes 21. The lock core body 1 is further provided with a second transmission shaft 6 extending towards the outer side of the door. Whether the second transmission shaft 6 and the pick 3 rotate synchronously is controlled by an electric control clutch assembly between them. An outer handle 7 is threadedly connected to the second transmission shaft 6. A snap ring 8 is clamped at the overlapping part of the meshing between the outer handle 7 and the second transmission shaft 6. The meshing length of the threaded connection between the outer handle 7 and the second transmission shaft 6 is less than or equal to 10 mm.

[0037] Further, the first positioning hole 21 can also be a threaded hole, and the end of the first limit screw 5 is also threadedly connected to the first positioning hole 21.

[0038] As described above, the lock core in this case includes a lock core body 1. The two ends of the lock core body 1 are provided with a first transmission shaft 2 and a second transmission shaft 6 for driving the pick 3 to rotate. The first transmission shaft 2 is correspondingly connected to the inner handle 4, and the second transmission shaft 6 is correspondingly connected to the outer handle 7.

[0039] Among them, the first transmission shaft 2 is provided with a number of first positioning holes 21, and the inner handle 4 is provided with a second positioning threaded hole 41. In this way, as long as the first positioning hole 21 and the second positioning threaded hole 41 are aligned and the first limit screw 5 is tightened so that the end of the first limit screw 5 inserts into the first positioning hole 21, the inner handle 4 can be fixedly connected to the first transmission shaft 2, enabling the user to drive the first transmission shaft 2 to rotate by rotating the inner handle 4. At the same time, since the first transmission shaft 2 is provided with a number of first positioning holes 21 evenly distributed axially, any one of the first positioning holes 21 can cooperate with the first limit screw 5 and the second positioning threaded hole 41 to fix the first transmission shaft 2 and the inner handle 4 together. In this way, facing doors of different thicknesses, the inner handle 4 can be fixed to different first positioning holes 21, thereby adjusting the distance between the lock core body 1 and the inner handle 4 and realizing the length adjustment of the lock core towards the inner direction of the door.

[0040] The second transmission shaft 6 is threadedly connected to the outer handle 7, and a snap ring 8 is provided at the meshing overlap of the second transmission shaft 6 and the outer handle 7. In this way, after the second transmission shaft 6 and the outer handle 7 are threadedly connected in place, the snap ring 8 can prevent the two from loosening, and at the same time, the snap ring 8 can also force the second transmission shaft 6 to rotate synchronously with the outer handle 7 when the user rotates the outer handle 7. The meshing length of the threaded connection between the outer handle 7 and the second transmission shaft 6 is less than or equal to 10 mm, which can avoid damage to the internal cable caused by excessive rotation when installing the outer handle 7. When it is necessary to adjust the distance between the lock core body 1 and the outer handle 7, an extension shaft can be installed between the second transmission shaft 6 and the outer handle 7. One end of the extension shaft is threadedly connected to the second transmission shaft 6 and the other end is threadedly connected to the outer handle 7 by using the original threaded structure of the second transmission shaft 6 and the outer handle 7. In this way, by installing extension shafts of different lengths, the distance between the second transmission shaft 6 and the outer handle 7 can be conveniently adjusted, and the length adjustment of the lock core in the direction of the outside of the door can be realized.

[0041] As described above, the lock core of this case can quickly adjust the distance between the lock core body 1 and the inner handle 4 by aligning the second positioning threaded hole 41 on the inner handle 4 with different first positioning holes 21 on the first transmission shaft 2 and then fixing the two with the first limit screw 5. The distance between the lock core body 1 and the outer handle 7 can be adjusted by installing extension shafts of different lengths between the lock core body 1 and the outer handle 7 by using the original threaded connection structure between the two. In this way, the overall length of the lock core of this case can be lengthened without disassembling the lock core body 1, thus avoiding the risks brought by disassembling the lock core and also greatly reducing the time required to adjust the length of the lock core. In addition, since the lock core of this case can separately adjust the distances between the inner and outer handles and the lock core body 1, the adjustment range is more flexible than the traditional scheme of lengthening the lock core body 1 as a whole. It can not only adapt to door bodies of different thicknesses but also adapt to different eccentric distances.

[0042] Specifically, a battery and a main control board are installed in the outer handle 7, the electric control clutch assembly is arranged in the lock core body 1, and the main control board in the outer handle 7 is electrically connected to the electric control clutch assembly through a cable. The cable is led out from the end of the outer handle 7 and passes through the second transmission shaft 6 to be connected to the electric control clutch assembly.

[0043] As Figures 4 to 16As shown, preferably, the lock core further includes at least one first extension member 9, which is sleeved on the first transmission shaft 2 between the lock core 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 core body 1 through a second locking screw 10. The outer contour of the first extension member 9 is the same as that of the lock core body 1. In this way, after adjusting the distance between the lock core body 1 and the inner handle 4, the first extension member 9 can be sleeved on the first transmission shaft 2 between the lock core body 1 and the inner handle 4 to extend the contour of the lock core body 1, and at the same time, it can also fill the space between the lock core body 1 and the inner handle 4, so that the lock core can better fit the opening on the door body, and avoid the first transmission shaft 2 shaking in the door body when the user rotates the inner handle 4 after lengthening, which affects the stability and service life of the lock core.

[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] As Figures 4 to 16 As shown, preferably, a first positioning groove 11 is provided on the end face of the lock core body 1 close to the inner side of the door. A first positioning protrusion 91 is provided on the end face of the first extension member 9 close to the lock core 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 core body 1 and the first extension member 9. A second positioning groove 92 is further provided on the end face of the first extension member 9 away from the lock core body 1. The second positioning groove 92 can form a concave-convex fit with the first positioning protrusion 91 of another first extension member 9 to prevent relative rotation between the two first extension members 9. In this way, through the first positioning groove 11 and the first positioning protrusion 91, it can be ensured that after the first extension member 9 is installed, there will be no relative rotation and misalignment between the first extension member 9 and the lock core body 1. At the same time, if multiple first extension members 9 are installed, it can also be ensured that there will be no relative rotation and misalignment between the front and rear first extension members 9 through the cooperation of the first positioning protrusion 91 and the second positioning groove 92. 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 member 9 will not rotate relative to the lock core body 1 and cause misalignment.

[0046] As Figures 4 to 16 As shown, preferably, a first through hole 93 for one end of the second locking screw 10 to pass through is provided on the first extension member 9. A third locking threaded hole 12 for the second locking screw 10 to pass through the first through hole 93 and be threadedly connected thereto is provided on the end face of the lock core body 1 close to the inner side of the door. In this way, after one end of the second locking screw 10 passes through the first through hole 93 and is then threadedly connected to the third locking threaded hole 12, the first extension member 9 can be locked and fixed to the lock core body 1 through the second locking screw 10.

[0047] Specifically, the third locking threaded hole 12 is provided in the first positioning groove 11, and the first through hole 93 penetrates through 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 total length of the first extension member 9 to be installed to correspond to a suitable length specification.

[0049] As Figures 12 to 15 shown, preferably, it further includes a first extension shaft 13. The first extension shaft 13 has the same shaft diameter as the first transmission shaft 2 and is coaxially arranged. A second positioning protrusion 131 is provided on the end face of the first extension shaft 13. A third positioning groove 22 is provided on the end face of the first transmission shaft 2 close to the first extension shaft 13. The second positioning protrusion 131 and the third positioning groove 22 can form a concave-convex fit to prevent the relative rotation of the first transmission shaft 2 and the first extension shaft 13. A fourth locking threaded hole 23 is further provided on the end face of the first transmission shaft 2. A second through hole 132 is provided on the first extension shaft 13 that penetrates 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. A plurality of first positioning holes 21 that extend radially and are evenly distributed along the axis are also provided on the first extension shaft 13.

[0050] Specifically, the first extension member 9 can also be sleeved on the first extension shaft 13.

[0051] As described above, when there are too many first extension members 9 installed between the lock core body 1 and the inner handle 4 and they do not pass over the first transmission shaft 2, the lock core in this case can still connect the first extension shaft 13 to the first transmission shaft 2. The first extension shaft 13 is provided with a second through hole 132, and a fourth locking threaded hole 23 is provided on the corresponding end face of the first transmission shaft 2. In this way, one end of the third locking screw 14 passes through the second through hole 132 and then is threadedly connected to the fourth locking threaded hole 23, which can coaxially fix the first transmission shaft 2 and the first extension shaft 13 together. At the same time, a third positioning groove 22 is provided on the end face of the first transmission shaft 2. Correspondingly, a second positioning protrusion 131 is provided on the end face of the first extension shaft 13. By forming a concave-convex fit between the third positioning groove 22 and the second positioning protrusion 131, it can be ensured that the first extension shaft 13 and the first transmission shaft 2 will not rotate relative to each other after being fixed together, thereby ensuring that the torque transmission will not be interrupted. Moreover, the first extension shaft 13 is also provided with first positioning holes 21 that are evenly distributed along the axis. In this way, after the first extension member 9 passes over the first transmission shaft 2, the inner handle 4 can be fixed to the first extension shaft 13 in the same fixing manner by connecting the first extension shaft 13, so as to achieve a greater adjustment distance.

[0052] AsFigures 4 to 18 As shown, preferably, the lock core 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 meshing length of the threaded connection between the second extension shaft 15 and the outer handle 7 is less than or equal to 10 mm. Snap rings 8 are provided at the overlapping meshing portions of the second extension shaft 15 with the second transmission shaft 6 and the overlapping meshing portion of the second extension shaft 15 with the outer handle 7. The second extension member 16 is sleeved on the second extension shaft 15, and the second extension member 16 is fixedly connected to the lock core body 1 by a fourth locking screw 17. The outer contour of the second extension member 16 is the same as that of the lock core 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 the second extension shaft 15 between the outer handle 7 and the second transmission shaft 6 in this case, the distance between the outer handle 7 and the lock core body 1 can be lengthened, and the connections of the second extension shaft 15 with the outer handle 7 and the second transmission shaft 6 can both use the original threaded connection structure, that is, one end of the second extension shaft 15 is threadedly connected to the outer handle 7 and the other end is also threadedly connected to the second transmission shaft 6. Correspondingly, snap rings 8 are provided at the overlapping meshing portions of the second extension shaft 15 with the outer handle 7 and the second transmission shaft 6 respectively for preventing loosening and forcing the front and rear of the threaded connection to rotate synchronously. In this way, the distance adjustment between the outer handle 7 and the lock core body 1 can be realized by connecting the second extension member 16. Similarly, the meshing length of the threaded connection between the second extension shaft 15 and the outer handle 7 is also less than or equal to 10 mm to avoid damaging the cable due to excessive torsion.

[0054] In addition, a second extension member 16 is also sleeved on the second extension shaft 15 between the outer handle 7 and the second transmission shaft 6 in this case. After adjusting the distance between the lock core body 1 and the outer handle 7, the second extension member 16 can be sleeved on the second extension shaft 15 between the lock core body 1 and the outer handle 7 to extend the contour of the lock core body 1. At the same time, the space between the lock core body 1 and the outer handle 7 can also be filled, so that the lock core can better fit the opening on the door body, avoiding the shaking of the second transmission shaft 6 and the second extension shaft 15 in the door body when the user rotates the outer handle 7 after lengthening, which affects the stability and service life of the lock core.

[0055] Specifically, the length B of the second extension member 16 has three specifications: 5 mm, 10 mm, and 20 mm, and the length C of the second extension shaft 15 has three specifications: 17 mm, 27 mm, and 37 mm.

[0056] As Figure 9 、 Figure 13 and Figure 18As shown, preferably, two clamping grooves 151 into which the snap ring 8 can be inserted are provided at one end of the second extension shaft 15 that is threadedly connected to the outer handle 7.

[0057] As described above, two clamping grooves 151 into which the snap ring 8 can be inserted are provided on the second extension shaft 15. In this way, when using the same second extension shaft 15, the outer handle 7 can also be rotated to different clamping grooves 151 for fixation, so as to further adjust the distance between the outer handle 7 and the lock core body 1 by adjusting the meshing distance between the outer handle 7 and the second extension shaft 15.

[0058] As Figures 4 to 15 , preferably, a fourth positioning groove 18 is provided on the end face of the lock core body 1 near the outer side of the door, a third positioning protrusion 161 is provided on the end face of the second extension member 16 close to the lock core body 1, and the fourth positioning groove 18 and the third positioning protrusion 161 can form a concave-convex fit to prevent relative rotation between the lock core body 1 and the second extension member 16. A fifth positioning groove 162 is further provided on the end face of the second extension member 16 away from the lock core body 1, and the fifth positioning groove 162 can form a concave-convex fit with the third positioning protrusion 161 of another second extension member 16 to prevent relative rotation between the two second extension members 16. In this way, through the cooperation of the fourth positioning groove 18 and the third positioning protrusion 161, it can be ensured that after the second extension member 16 is installed, there will be no relative rotation and misalignment between the second extension member 16 and the lock core body 1. At the same time, if multiple second extension members 16 are installed, the cooperation of the third positioning protrusion 161 and the fifth positioning groove 162 can also ensure that there is no relative rotation and misalignment between the front and rear second extension members 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 member 16 will not rotate relative to the lock core body 1 and cause misalignment.

[0059] As Figures 4 to 15 , preferably, a third through hole 163 through which one end of the fourth locking screw 17 passes is provided on the second extension member 16, and a fifth locking threaded hole 19 for the fourth locking screw 17 to pass through the third through hole 163 and be threadedly connected thereto is provided on the end face of the lock core body 1 near the outer side of the door. In this way, after one end of the fourth locking screw 17 passes through the third through hole 163 and is threadedly connected to the fifth locking threaded hole 19, the second extension member 16 can be locked and fixed to the lock core body 1 by the fourth locking screw 17.

[0060] Specifically, the fifth locking threaded hole 19 is provided in the fourth positioning groove 18, and the third through hole 163 penetrates through the third positioning protrusion 161 and the fifth positioning groove 162.

[0061] As described above, the present case protects a lock core with extendable ends, and all technical solutions identical or similar to the present case shall be regarded as falling within the protection scope of the present case.

Claims

1. A lock core with extendable ends, characterized in that It includes a lock core body (1). A first transmission shaft (2) extending towards the inner side of the door is provided on the lock core body (1). The first transmission shaft (2) is connected to a pick (3) and rotates synchronously. A number of first positioning holes (21) extending radially and evenly distributed axially are provided on the first transmission shaft (2). An inner handle (4) is sleeved on the first transmission shaft (2). A second positioning threaded hole (41) is provided on the side wall of the inner handle (4). A first limit screw (5) is threadedly connected in the second positioning threaded hole (41). The end of the first limit screw (5) passes through the second positioning threaded hole (41) and inserts into one of the first positioning holes (21). A second transmission shaft (6) extending towards the outer side of the door is further provided on the lock core body (1). Whether the second transmission shaft (6) and the pick (3) rotate synchronously is controlled by an electric control clutch assembly between them. An outer handle (7) is threadedly connected to the second transmission shaft (6). A snap ring (8) is clamped at the meshing and overlapping part between the outer handle (7) and the second transmission shaft (6). The meshing length of the threaded connection between the outer handle (7) and the second transmission shaft (6) is less than or equal to 10 mm.

2. The lock core with extendable ends according to claim 1, characterized in that It further includes at least one first extension piece (9). The first extension piece (9) is sleeved on the first transmission shaft (2) between the lock core body (1) and the inner handle (4). The first extension piece (9) has several length specifications. The first extension piece (9) is fixedly connected to the lock core body (1) by a second locking screw (10). The outer contour of the first extension piece (9) is the same as that of the lock core body (1).

3. The lock core with extendable ends according to claim 2, characterized in that A first positioning groove (11) is provided on the end face of the lock core body (1) close to the inner side of the door. A first positioning protrusion (91) is provided on the end face of the first extension piece (9) close to the lock core 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 core body (1) and the first extension piece (9). A second positioning groove (92) is further provided on the end face of the first extension piece (9) away from the lock core body (1). The second positioning groove (92) can form a concave-convex fit with the first positioning protrusion (91) of another first extension piece (9) to prevent relative rotation between the two first extension pieces (9).

4. A lock core with extendable ends according to any one of claims 2 or 3, characterized in that A first through hole (93) for one end of the second locking screw (10) to pass through is provided on the first extension piece (9). A third locking threaded hole (12) for the second locking screw (10) to pass through the first through hole (93) and be threadedly connected thereto is provided on the end face of the lock core body (1) close to the inner side of the door.

5. A lock core with extendable ends according to any one of claims 1 or 2, characterized in that It further includes a first extension shaft (13). The first extension shaft (13) has the same shaft diameter as the first transmission shaft (2) and is coaxially arranged therewith. A second positioning protrusion (131) is provided on the end face of the first extension shaft (13). A third positioning groove (22) is provided on the end face of the first transmission shaft (2) close to the first extension shaft (13). The second positioning protrusion (131) and the third positioning groove (22) can form a concave-convex fit to prevent relative rotation between the first transmission shaft (2) and the first extension shaft (13). A fourth locking threaded hole (23) is further provided on the end face of the first transmission shaft (2). A second through hole (132) penetrating through the front and back is provided on the first extension shaft (13). 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). A plurality of first positioning holes (21) extending radially and evenly distributed axially are also provided on the first extension shaft (13).

6. The lock core with extendable ends according to claim 1, wherein It 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 meshing length of the threaded connection between the second extension shaft (15) and the outer handle (7) is less than or equal to 10 mm. Snap rings (8) are provided at the meshing overlapping parts of the second extension shaft (15) and the second transmission shaft (6) and the meshing overlapping part of the second extension shaft (15) and the outer handle (7). The second extension member (16) is sleeved on the second extension shaft (15). The second extension member (16) and the lock core body (1) are fixedly connected by a fourth locking screw (17). The outer contour of the second extension member (16) is the same as that of the lock core 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 core with extendable ends according to claim 6, characterized in that Two card slots (151) for the snap ring (8) to be inserted therein are provided at one end of the second extension shaft (15) where it is threadedly connected to the outer handle (7).

8. The lock core with extendable ends according to claim 6, characterized in that A fourth positioning groove (18) is provided on the end face of the lock core body (1) close to the outer side of the door. A third positioning protrusion (161) is provided on the end face of the second extension member (16) close to the lock core body (1). The fourth positioning groove (18) and the third positioning protrusion (161) can form a concave-convex fit to prevent relative rotation between the lock core body (1) and the second extension member (16). A fifth positioning groove (162) is further provided on the end face of the second extension member (16) away from the lock core body (1). The fifth positioning groove (162) can form a concave-convex fit with the third positioning protrusion (161) of another second extension member (16) to prevent relative rotation between the two second extension members (16).

9. A lock core with extendable ends according to claim 6, characterized in that A third through hole (163) through which one end of a fourth locking screw (17) passes is provided on the second extension member (16), and a fifth locking threaded hole (19) for the fourth locking screw (17) to be threadedly connected thereto after passing through the third through hole (163) is provided on an end face of the lock core body (1) near the outer side of the door.

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