A type of lock cylinder

Abstract

This invention discloses a lock cylinder, a housing, and an inner cylinder assembly. The inner cylinder assembly includes an inner cylinder body, a key actuating bead, a meshing component, a pushing component, and a horizontal grille assembly. The key actuating bead is provided with a first series of teeth. The meshing component is provided with a second series of teeth that can mesh with the first series of teeth to prevent the key actuating bead from moving relative to the meshing component, a receiving groove, and a driven part that can rotate to disengage or engage with the first series of teeth under force. The pushing component is provided with a pushing part that can engage with the driven part of the meshing component to drive the meshing component to rotate and disengage from the key actuating bead, thereby enabling key replacement. This invention has a simple structure, high component strength, long service life, and allows for key replacement.

Description

Technical Field

[0001] This invention relates to the field of door locks, and in particular to a lock cylinder with a replaceable key. Background Technology

[0002] Existing technologies include key-replaceable lock cylinders, such as Chinese invention patent application CN 112639238 A published on April 9, 2021, which discloses a resetable lock cylinder. This cylinder has a cylinder body and a plug assembly. The lock cylinder includes a key follower and a corresponding rack disposed in the plug assembly. Disengagement of the rack from the key follower allows for lock cylinder reset. However, this lock cylinder has a relatively complex structure. The plug assembly is designed as two parts, which can move relative to each other in the longitudinal direction to separate the key follower and the rack, thereby enabling key replacement. This type of lock cylinder has a complex structure and a large size. Achieving a smaller size would be difficult to manufacture, and the lock cylinder's robustness is hard to guarantee. Furthermore, the rack is thin and has low strength. Therefore, this type of lock cylinder in the prior art requires further improvement. Summary of the Invention

[0003] The present invention aims to address the shortcomings of the existing technology and provide a lock cylinder with a simple structure, high component strength, long service life, and replaceable key.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: The present invention relates to a lock cylinder, a housing, and an inner liner assembly. The housing includes an inner liner cavity formed along a longitudinal axis and a locking groove extending longitudinally from the inner wall of the inner liner cavity. The inner liner assembly includes an inner liner body, which is rotatably disposed within the inner liner cavity about a longitudinal axis and has a keyhole. The inner liner assembly further includes: A key-operated bead assembly includes a key-operated bead disposed in the inner liner body, and the key-operated bead is provided with a first series of teeth; A meshing element is disposed in a meshing cavity formed in the inner liner body. The meshing element is rotatably disposed in the meshing cavity. The meshing element is provided with a second series of teeth that can mesh with the first series of teeth to prevent the key actuation ball from moving relative to the meshing element. The number of teeth in the first series of teeth is less than the number of teeth in the second series of teeth. The meshing element is also provided with a receiving groove and a driven part that can rotate to disengage or rotate to engage the first series of teeth with the second series of teeth when subjected to force. A pusher, extending longitudinally within a portion of the inner body, is provided with a driven portion that engages with the driven portion of the engaging member to drive the engaging member to rotate and disengage from the key actuation ball, thereby enabling key replacement; and A horizontal gate assembly for controlling the locked and unlocked states of the lock cylinder includes a horizontal gate. When the horizontal gate falls into the receiving groove in the engaging member, the horizontal gate can separate from the locking groove of the housing to allow the inner cylinder assembly to rotate relative to the housing, and the lock cylinder is in the unlocked position. When the horizontal gate cannot enter the receiving groove, the horizontal gate engages with the locking groove of the housing to prevent the inner cylinder assembly from rotating relative to the housing, and the lock cylinder is in the locked state.

[0005] Furthermore, the pushing part of the pushing member is a protrusion extending from the position of the pushing member corresponding to the engaging member, and the driven part of the engaging member is a recess that engages with the protrusion.

[0006] Furthermore, the two sides of the protrusion of the pusher form a partially arcuate inner surface of the engagement cavity.

[0007] Furthermore, the inner wall of the inner cavity of the housing, at the end away from the key socket, has a first groove for preventing the pusher from retracting toward the key socket.

[0008] Furthermore, the end of the pusher away from the key socket is provided with a slot, and an elastic element is fitted on the slot. The elastic element can be combined with the first groove to prevent the pusher from retracting.

[0009] Furthermore, the elastic element is a spring sheet with a roughly heart-shaped cross-section, the spring sheet having a notch, and the spring sheets on both sides of the notch protruding above the outer surface of the inner liner body when the elastic force is released.

[0010] Furthermore, the inner wall of the inner cavity of the housing has a second groove at the end away from the key socket, and a blocking piece is placed in the second groove. One end of the blocking piece abuts against one side of the spring plate, and the other end abuts against one side of the retaining ring used to connect the housing and the inner body.

[0011] Furthermore, the inner liner assembly is also provided with a return spring that can reset the pusher towards the keyhole.

[0012] Furthermore, the engaging element is a generally cylindrical body with a fan-shaped groove along its circumference, and a second series of teeth of the engaging element is located in a portion of the fan-shaped groove, the second series of teeth being of a correspondingly approximate fan shape.

[0013] Furthermore, the inner cavity of the housing is provided with a positioning groove extending longitudinally for convenient positioning when changing locks, and the depth of the positioning groove is less than the depth of the locking groove on the housing.

[0014] The beneficial effects of this invention are that, compared with the prior art, the inner cylinder body has an integral structure, which is simpler and stronger; the engaging part and the key actuation ball are disengaged by rotation, making the structure more compact. Compared with the prior art, a smaller lock cylinder can be manufactured while ensuring strength; in addition, since the engaging part is a column, its strength is stronger than the rack of the prior art, and it can be easily manufactured with copper material, making the lock cylinder stronger, safer, and longer in service life. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of the lock cylinder according to an embodiment of the present invention; Figure 2 This is a schematic diagram of inserting a key into a lock cylinder according to an embodiment of the present invention; Figure 3 for Figure 2 A schematic cross-sectional view along the AA direction; Figure 4 This is a schematic diagram of the key-operated bead structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of an example of an engaging component according to an embodiment of the present invention; Figure 6 for Figure 5 A schematic diagram of the meshing component from another direction is shown; Figure 7 This is a schematic diagram of another example of the meshing component according to an embodiment of the present invention; Figure 8 for Figure 7 A schematic diagram of the meshing component from another direction is shown; Figure 9 To adopt Figure 7 A schematic diagram of the lock cylinder structure of the engaging parts is shown; Figure 10 This is a schematic diagram of the structure of the pusher component according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the elastic element according to an embodiment of the present invention; Figure 12 This is a schematic diagram of a portion of the structure of the inner liner assembly according to an embodiment of the present invention; Figure 13 This is a schematic diagram of another part of the structure of the inner liner assembly according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the housing in one direction according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the housing from another direction according to an embodiment of the present invention. Detailed Implementation

[0016] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0017] In the description of this invention, the use of terms such as "first," "fourth," and "fifth" is merely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0019] In this invention, unless otherwise explicitly defined, the terms "setting," "installation," and "connection" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0020] See Figures 1-3 The image shows a lock cylinder 10 according to one embodiment. The lock cylinder 10 includes a housing 100 and an inner cylinder assembly 200. The inner cylinder assembly 200 includes an inner cylinder body 210, a key actuation bead assembly 220, an engaging member 230, a pushing member 240, and a horizontal grille assembly 250. The key actuation assembly 220 includes a key actuation bead 221 and a spring 222.

[0021] Figure 1 , Figure 3 , Figure 12 , Figure 14 and Figure 15The structure of the housing 100 of this embodiment is shown, including an inner cavity 101 formed along a longitudinal axis and a locking groove 103 extending longitudinally from the inner wall 102 of the inner cavity 101. In this embodiment, the inner wall 102 of the inner cavity 101 of the housing 100, away from the keyhole, has grooves 104 and 105. The function of these grooves is described in detail below. To facilitate key replacement with a tactile feel and accurate positioning, a positioning groove 106 is provided on the inner wall of the inner cavity of the housing, extending longitudinally. The depth of the positioning groove is less than the depth of the locking groove 103 on the housing. In this embodiment, the positioning groove 106 and the locking groove 103 are circumferentially spaced 180° apart on the inner wall of the inner cavity. This structure determines that a 180° rotation is required to change the key. Of course, if the key is rotated 90° to change, the positioning groove 106 is correspondingly arranged at a position 90° apart from the locking groove. And so on, the position of the positioning groove is determined according to the position of key replacement.

[0022] Figure 1 , Figure 3 , Figure 12 and Figure 13 The structure of the inner liner body 210 of this embodiment is shown. The inner liner body 210 is generally cylindrical and is rotatably disposed in the inner liner cavity 101 about a longitudinal axis. Here, the longitudinal direction refers to the direction in which the key 30 is inserted into the inner liner body. The inner liner body 210 includes an inner liner cover 211, a middle main body portion 212, and a drive portion 213. The inner liner cover 211 is provided with a key slot 2111 and a tool slot 2112. The middle main body portion 212 is provided with a key actuation bead cavity 2121 and an engagement cavity 2122 extending perpendicular to the longitudinal direction, and a pusher groove 2123 and a transverse groove 2124 extending in the longitudinal direction. The key actuation bead cavity 2121 and the engagement cavity 2122 are partially connected, and the engagement cavity 2122 and the pusher groove 2123 are partially connected. The drive portion 213 is provided with a circumferential groove for accommodating a retaining spring 20 for connecting the housing 100 to the inner liner body 210.

[0023] Figure 1 , Figure 3 and Figure 4 The key actuation assembly 220 of this embodiment shown includes a key actuation bead 221 and a spring 222. One end of the key actuation bead 221 matches the key teeth and can reciprocate within the key actuation bead cavity 2121 as the key is inserted or removed. In this embodiment, the main body of the key actuation bead 221 is generally cylindrical, with a recess 2211 at one end for housing the spring 222, and a tapered portion 2212 at the other end that matches the key teeth. A series of teeth 2213 are provided on the key actuation bead 221. Figure 4The series of teeth 2213 shown is two in number; it is conceivable that the number of teeth in this series could be any other number. Since this series of teeth is for meshing, those skilled in the art will readily understand that the series of teeth could be other shapes of meshing parts, such as grooves or protrusions. To prevent the key actuation bead from wobbling, a protrusion 2214 is provided on the key actuation bead 221, and correspondingly, a recess 2126 for sliding the protrusion 2214 is provided at a corresponding position on the inner body 210. A sealing piece 223 is also provided on the inner body 210 at the top of the key actuation bead cavity 2121 to facilitate the abutment of the spring 222.

[0024] Figure 1 , Figure 3 , Figure 5 -- Figure 8 Two examples of the engaging members 230 of this embodiment are shown. In this embodiment, there are five engaging members 230, which are rotatably disposed in the engaging member cavity 2122. The cross-section of the engaging members 230 is generally a circular or rectangular cylinder. A series of teeth 231 are provided along the long side of one side of the cylinder. On the other side, approximately at the waist position, there is a receiving groove 232 and a driven part that allows a series of teeth 2213, which can be rotated to disengage from or rotate to engage with the series of teeth 231 of the engaging member when subjected to force. In this embodiment, the driven part is a recess 233, which is a groove that passes through the long side of the engaging member. This structure is easy to manufacture.

[0025] The series teeth 231 shown in this embodiment have 10 teeth, which is more than the number of teeth in the series teeth 2213 on the key actuating ball. When the series teeth 2213 on the key actuating ball engage with the series teeth 231 on the engaging member, the key actuating ball and the engaging member will not move relative to each other in a direction perpendicular to the longitudinal direction. To increase the strength of the engaging member, the teeth can be designed into a part inside the column, such as... Figure 5 The cylinder of the engagement member shown has a fan-shaped groove 234 along its circumference. A series of teeth 231 of the engagement member are located in a portion of the fan-shaped groove 234. This structure increases the size of the cylindrical portion of the engagement member, thereby improving its strength. The series of teeth 231 are designed in a generally fan-shaped shape. Correspondingly, the series of teeth 2213 on the key actuation bead are also designed in a generally fan-shaped shape. This results in a larger contact area for the teeth, enhancing their strength.

[0026] Those skilled in the art will readily recognize that the meshing element can also be a column of other shapes, such as a column with a fan-shaped cross-section, as long as the column can rotate at a partial angle within the meshing cavity.

[0027] Figure 1 , Figure 3 and Figure 10The pusher 240 shown in this embodiment extends longitudinally and is disposed in the middle main body portion 211 of the inner body 210, and is placed in the pusher groove 2123. The pusher 240 is provided with a pusher portion that can engage with the driven part of the engaging member to drive the engaging member to rotate and disengage from the key actuation ball, thereby enabling key replacement. In this embodiment, the pusher portion is a protrusion 241 extending from one side along the long side of the pusher 240. After the lock cylinder is assembled, the position corresponding to the protrusion 241 is the recess 233 of the engaging member, which serves as the driven part, and it engages with the recess. To prevent the engaging member from wobbling within the engaging member cavity, the two sides of the protrusion form partially arc-shaped inner surfaces 242 of the engaging member cavity. This allows the pusher portion to both push and support, effectively preventing the engaging member from wobbling.

[0028] When changing the key, in order to facilitate operation and keep the pusher in a stable state, a slot 245 is provided at the end of the pusher away from the key socket. An elastic element is fitted on the slot 245. A groove 104 is provided on the inner wall of the inner cavity of the housing away from the key socket. The elastic element can be combined with the groove 104 of the housing to prevent the pusher from retracting towards the key socket. Figure 9 The diagram shows one structure of the elastic element 243, which is a spring sheet 243 with a cross-sectional shape approximately heart-shaped. The spring sheet 243 has a notch 2431, and the spring sheets 2432 on both sides of the notch protrude above the outer surface of the inner liner body when the elastic force is released.

[0029] See Figure 7 and Figure 14 To prevent the lock cylinder from jamming due to someone inserting a foreign object into the tool holder and pushing the pusher inside the lock cylinder while it is locked, causing the engaging parts and key actuation ball to disengage, a groove 105 is provided on the inner wall 102 of the inner cavity of the housing 100 at the end away from the key holder. A blocking piece 247 is placed in the groove 105, with one end of the blocking piece 247 abutting against one side of the spring plate 243 and the other end abutting against one side of the retaining spring. The groove 105 has a locking position 1051 for abutting against the blocking piece, and a space portion 1053 with a slope 1052 and a stop wall 1054 extends from the locking position 1051 of the groove 105 toward the key holder. The blocking piece 247 is placed in the groove 105 and abuts against the locking position 1051. The spring pieces 2432 on both sides of the notch 2431 of the spring piece 243 fall into the space portion 1053. At this time, the pusher 240 is fixed and cannot move in the direction of key insertion, effectively preventing human factors from damaging the lock cylinder.

[0030] Figure 1 , Figure 10 , Figure 12The inner liner assembly 200 shown in this embodiment is also provided with a return spring 244 that can reset the pusher 240 toward the keyhole. Specifically, the end of the pusher 240 away from the keyhole is provided with a recess 246 for placing the return spring 244. In the working state, one end of the return spring 244 is located in the recess 246, and the other end abuts against the bottom wall 2125 of the pusher groove 2123.

[0031] Figure 1 , Figure 3 The horizontal grille assembly 250 of this embodiment is shown for controlling the locked and unlocked states of the lock cylinder. The horizontal grille assembly 250 includes a horizontal grille 251 and a spring 252 abutting against the steps 253 at both ends of the long side of the horizontal grille. When the horizontal grille falls into the receiving groove 232 in the engaging member, the horizontal grille 251 can separate from the locking groove 103 of the housing 100 to allow the inner liner assembly 200 to rotate relative to the housing 100, and the lock cylinder is in the unlocked position. When the horizontal grille 251 cannot enter the receiving groove 232, the horizontal grille 251 engages with the locking groove 103 of the housing to prevent the inner liner assembly from rotating relative to the housing, and the lock cylinder is in the locked state.

[0032] The operation process for changing the key in this invention is as follows: When no key is inserted, the spring plate 243 on the pusher 240 is located in the space 1053 formed by the groove 105 and abuts against the blocking plate 247 in the groove 105. A series of teeth 2213 on the key actuation bead 221 and a series of teeth 231 on the engaging member 230 partially engage. When the first matching key is inserted, the key actuation bead 221 reciprocates in the key actuation bead cavity 2121 as the key teeth are inserted, and drives the engaging member 230 to reciprocate in the engaging member cavity 2122. When the key is inserted to the unlock position, the receiving groove 232 of the engaging member 230 aligns with the horizontal bar 251. When the first key is rotated, because the locking groove 103 of the housing 100 has an inclined surface 1031, the end of the horizontal bar 251 near the housing 100 rotates out of the locking groove 103 along the inclined surface 1031. At this time, the end of the horizontal bar 251 near the engaging member 230 is pressed into the aligned receiving groove 232 under the pressure of the inner wall 102 of the housing 100, and the lock cylinder is in the unlocked state, causing the inner cylinder assembly 200 to rotate relative to the housing 100. At the same time, because the space portion 1053 of the groove 105 has an inclined surface 1052, the spring piece 243 can rotate out of the space portion 1053, and the spring piece 2432 is pressed into the inner cylinder body. When the key is rotated 180° from the initial position, the horizontal bar 251 falls into the positioning groove 106 of the inner wall 102 of the housing under the action of the spring 252. Since the depth of the groove 106 is less than the depth of the locking groove 103, the horizontal bar 251 cannot completely disengage from the receiving groove 232 at this time, and the key cannot be pulled out. At this time, the pusher 240 rotates to the groove 104 at the end of the inner wall 102 of the housing 100 away from the key socket 2111. A tool is inserted into the tool socket 2112 of the inner cover 211. The tool pushes the pusher 240 to move in the longitudinal direction, thereby pushing the spring plate 243 on the pusher 240 into the groove 104. As the elastic member 243 is released in the groove 104, the spring plate 2432 on the elastic member 243 is stuck into the bottom edge 1041 of the groove 104, preventing the pusher 240 from retracting. At the same time, as the protrusion 241 on the pusher 240 engages with the recess 233 in the engaging member 230, as the pusher 240 pushes, the recess 233 is forced to rotate the engaging member 230 in the engaging member cavity. A series of teeth 231 on the engaging member rotate and disengage from a series of teeth 2213 on the key bead.Because the series of teeth 2213 on the key actuation bead 221 are disengaged from the series of teeth 231 on the engaging member, the key actuation bead 221 is in a freely movable state. At this time, the first key can be removed, and then the second matching key can be inserted. When the second key is inserted into the unlock position, because the transverse bar 251 is still retracted into the receiving groove 232 of the engaging member, the cone of the key actuation bead rests on the teeth of the second key. At this time, the series of teeth 2213 on the key actuation bead is repositioned. Then, the second key is rotated, because the concave… The groove 104 has an inclined surface, and the groove 104 can be rotated out. The spring piece 2432, which is higher than the outer surface of the inner liner body, is pressed into the inner liner body by the inner wall 102 of the shell. At this time, under the action of the return spring 244, the pusher 240 moves towards one end of the key slot. Thus, under the drive of the protrusion 241 of the pusher, the recess 233 is forced to rotate the engaging member 230 in the opposite direction, thereby causing a series of teeth 2213 on the key actuation bead 221 and a series of partial teeth 231 of the engaging member to engage, thus completing the key replacement.

[0033] 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 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.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lock cylinder, comprising: A shell and an inner liner assembly, the shell including an inner liner cavity formed along a longitudinal axis and a locking groove extending longitudinally from the inner wall of the inner liner cavity, the inner liner assembly including an inner liner body, the inner liner body being rotatably disposed in the inner liner cavity about a longitudinal axis and having a keyhole, characterized in that the inner liner assembly further includes: A key-operated bead assembly includes a key-operated bead disposed in the inner liner body, and the key-operated bead is provided with a first series of teeth; A meshing element is disposed in a meshing cavity formed in the inner liner body. The meshing element is rotatably disposed in the meshing cavity. The meshing element is provided with a second series of teeth that can mesh with the first series of teeth to prevent the key actuation ball from moving relative to the meshing element. The number of teeth in the first series of teeth is less than the number of teeth in the second series of teeth. The meshing element is also provided with a receiving groove and a driven part that can rotate to disengage or rotate to engage the first series of teeth with the second series of teeth when subjected to force. A pusher, extending longitudinally within a portion of the inner body, is provided with a driven portion that engages with the driven portion of the engaging member to drive the engaging member to rotate and disengage from the key actuation ball, thereby enabling key replacement; and A horizontal gate assembly for controlling the locked and unlocked states of the lock cylinder includes a horizontal gate. When the horizontal gate falls into the receiving groove in the engaging member, the horizontal gate can separate from the locking groove of the housing to allow the inner cylinder assembly to rotate relative to the housing, and the lock cylinder is in the unlocked position. When the horizontal gate cannot enter the receiving groove, the horizontal gate engages with the locking groove of the housing to prevent the inner cylinder assembly from rotating relative to the housing, and the lock cylinder is in the locked state.

2. The lock cylinder according to claim 1, characterized in that: The pushing part of the pusher is a protrusion extending from the position of the pusher corresponding to the engagement member, and the driven part of the engagement member is a recess that engages with the protrusion.

3. The lock cylinder according to claim 1 or 2, characterized in that: The two sides of the protrusion of the pusher form a partially arcuate inner surface of the engagement cavity.

4. The lock cylinder according to claim 1 or 2, characterized in that: The inner wall of the inner cavity of the housing has a first groove at the end away from the key socket to prevent the pusher from retracting toward the key socket.

5. The lock cylinder according to claim 4, characterized in that: The end of the pusher away from the keyhole is provided with a slot, and an elastic element is fitted on the slot. The elastic element can be combined with the first groove to prevent the pusher from retracting.

6. The lock cylinder according to claim 6, characterized in that: The elastic element is a spring sheet with a roughly heart-shaped cross-section. The spring sheet has a notch, and the spring sheets on both sides of the notch protrude above the outer surface of the inner liner body when the elastic force is released.

7. The lock cylinder according to claim 7, characterized in that: The inner wall of the inner cavity of the housing has a second groove at the end away from the key socket. A blocking piece is placed in the second groove. One end of the blocking piece abuts against one side of the spring plate, and the other end abuts against one side of the retaining ring used to connect the housing and the inner body.

8. The lock cylinder according to claim 1, characterized in that: The inner liner assembly is also provided with a return spring that can reset the pusher to the direction of the keyhole.

9. The lock cylinder according to claim 1 or 2, characterized in that: The meshing element is a generally cylindrical body with a fan-shaped groove along its circumference. The second series of teeth of the meshing element are located in a portion of the fan-shaped groove, and the shape of the second series of teeth is a correspondingly approximately fan-shaped shape.

10. The lock cylinder according to claim 1 or 2, characterized in that: The inner cavity of the housing is provided with a positioning groove extending longitudinally for easy positioning when changing the lock. The depth of the positioning groove is less than the depth of the locking groove on the housing.

Images