Lock cylinder mechanism and lock

Abstract

The utility model discloses a lock cylinder mechanism, which belongs to a lock cylinder mechanism, solves the problem of potential safety hazards caused by technical unlocking of the lock cylinder mechanism, and adopts the technical scheme that the lock cylinder mechanism mainly comprises an outer lock cylinder body, an inner lock cylinder body and a connecting sleeve, an unlocking dial wheel for unlocking is arranged on the connecting sleeve, an outer transmission part is arranged in the connecting sleeve, and the inner transmission part is arranged in the outer transmission part. One end of the outer transmission part is in transmission connection with the unlocking shifting wheel, the other end of the outer transmission part is in transmission connection with the outer lock cylinder body, an unlocking part is eccentrically arranged at the inner end of the outer transmission part, the inner lock cylinder body is in transmission connection with the unlocking shifting wheel through an inner transmission part, and an unlocking groove is formed in the outer end of the inner transmission part and corresponds to the unlocking part. The outer transmission part is biased by the elastic element to keep the separation trend of the unlocking part and the unlocking groove, and the key unlocking process of the outer lock cylinder body triggers the outer transmission part to move towards the inner lock cylinder body so that the unlocking part and the unlocking groove can be connected. The technical unlocking prevention safety performance of the lock cylinder mechanism is mainly improved. The utility model further discloses a lock.

Description

A lock cylinder mechanism and a lock Technical Field

[0001] This utility model relates to the technical field of locks, and in particular to a lock cylinder mechanism and a lock. Background Technology

[0002] The lock cylinder mechanism is the core component of a lock, and its structure and working principle directly determine the security and reliability of the lock.

[0003] An existing lock cylinder mechanism includes an inner lock cylinder and an outer lock cylinder, which are fixedly connected by a connecting rod. A dial for unlocking is rotatably mounted on the connecting rod. The outer lock cylinder and the dial are connected by a first transmission component, so that when the outer lock cylinder rotates, it can drive the dial to rotate through the first transmission component to unlock. The inner lock cylinder is also connected to the dial, making it convenient for users to open the door from inside the room using the inner lock cylinder.

[0004] The outer lock cylinder of the above-mentioned lock cylinder mechanism is the basic structure of a commonly used pin tumbler lock cylinder. Under normal conditions, the first transmission component is connected to the dial component. When a skilled lock picker uses a technical lock picking tool to rotate the outer lock cylinder, the first transmission component can easily drive the dial component to rotate and unlock, thereby affecting the lock cylinder mechanism's security performance against technical lock picking. Summary of the Invention

[0005] The purpose of this utility model is to provide a lock cylinder mechanism and a lock, to solve the security risks of lock cylinder mechanism being technically unlocked, and to improve the security performance of lock cylinder mechanism against technical unlocking.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a lock cylinder mechanism, including an outer lock cylinder body, an inner lock cylinder body, and a connecting sleeve that fixes the outer lock cylinder body and the inner lock cylinder body. The connecting sleeve is provided with an unlocking dial for unlocking. An external transmission component is provided inside the connecting sleeve. One end of the external transmission component is connected to the unlocking dial and the other end is connected to the outer lock cylinder body. An unlocking component is eccentrically provided at the inner end of the external transmission component. The inner lock cylinder body and the unlocking dial are connected through the internal transmission component. An unlocking groove is provided at the outer end of the internal transmission component corresponding to the unlocking component. The external transmission component is biased by an elastic element to maintain the separation tendency of the unlocking component and the unlocking groove. The key unlocking process of the outer lock cylinder body triggers the external transmission component to move towards the inner lock cylinder body, so that the unlocking component and the unlocking groove engage.

[0007] After adopting the above technical solution, this utility model has the following advantages: The outer lock cylinder and the inner lock cylinder are connected by a connecting sleeve, which improves the stability of the connection between the outer lock cylinder and the inner lock cylinder. An unlocking dial is installed on the connecting sleeve to facilitate the unlocking of the lock cylinder mechanism. When the user is outside the door and needs to unlock, they insert the key into the outer lock cylinder. When the inner end of the key abuts against the outer end face of the outer transmission component, the key pushes the outer transmission component inward, causing the unlocking component to be inserted into the unlocking slot. This results in the unlocking component and the unlocking slot being in an engaged state. At this time, the user turns the key, causing the spindle of the outer lock cylinder to rotate, which in turn drives the unlocking dial to unlock via the outer transmission component and the unlocking component. The eccentric setting of the unlocking component and the outer transmission component makes the unlocking component... The distance between the shaft center and the shaft center of the external transmission component forms the torque that drives the internal transmission component to rotate, ensuring that the lock can be opened by inserting the unlocking component and the unlocking groove. Furthermore, the eccentric setting of the unlocking component allows the unlocking component and the unlocking groove to be set into mutually compatible cylindrical shapes, reducing the machining difficulty of the unlocking component and the unlocking groove. When the key is removed from the outer lock cylinder, the external transmission component, under the bias of the elastic element towards the outer lock cylinder, drives the unlocking component to move outward, so that the unlocking component and the unlocking groove are in a separated state. When a locksmith uses a lock-picking tool to drive the outer lock cylinder to rotate, the lock-picking tool is difficult to push the external transmission component inward to the point where the unlocking component and the unlocking groove are engaged due to the obstruction of the outer lock cylinder, thereby improving the security performance of the lock cylinder mechanism against lock picking.

[0008] Furthermore, the inner end of the external transmission component is provided with a receiving groove for accommodating the unlocking component, and an elastic element is provided in the receiving groove. The elastic element pushes the unlocking component inward so that the unlocking component protrudes from the inner end face of the external transmission component.

[0009] By adopting the aforementioned technical solution, a receiving groove is provided on the outer transmission component to accommodate the unlocking component, and an elastic component is provided in the receiving groove. The unlocking component is pushed by the elastic component to ensure that the inner end of the unlocking component protrudes from the inner end face of the outer transmission component and is inserted into the unlocking groove. This ensures that the unlocking component can move inward through the outer transmission component during normal unlocking so that it can be inserted into the unlocking groove. It also ensures that the outer transmission component can drive the inner transmission component during normal unlocking.

[0010] Furthermore, the inner end face of the external transmission component is provided with a receiving step, the unlocking component is provided with a limiting step, a blocking plate is fixed on the receiving step, the unlocking component passes through the blocking plate, and the limiting step abuts against the blocking plate to stabilize the unlocking component in the receiving groove.

[0011] By adopting the aforementioned technical solution, a receiving step for accommodating the blocking plate is provided on the inner end face of the external transmission component, and a limiting step is provided on the unlocking component. When the unlocking component protrudes from the external transmission component under the abutment of the elastic component, the unlocking component is limited by the abutment of the limiting step and the outer end face of the blocking plate, so as to prevent the unlocking component from detaching from the external transmission component and improve the stability of the unlocking component in the receiving groove on the external transmission component.

[0012] Furthermore, the connecting sleeve is provided with an installation sleeve, the inner end of the installation sleeve is provided with a first limiting part, the outer end of the inner transmission member is provided with a second limiting part, the outer side wall of the first limiting part abuts against the inner side wall of the second limiting part to fix the installation sleeve in the inward and outward directions, and the installation sleeve and the inner transmission member cover the inner peripheral wall of the unlocking dial.

[0013] By adopting the aforementioned technical solution, when the mounting sleeve and the inner transmission component are fixed in the inward and outward directions, the mounting sleeve is fixed in the inward and outward directions by the abutment between the outer side wall of the first limiting part and the inner side wall of the second limiting part, thereby improving the stability between the mounting sleeve and the inner transmission component and ensuring that the mounting sleeve and the inner transmission component block the inner peripheral wall of the unlocking wheel, thus preventing technical lock pickers from violently damaging the outer lock cylinder and then using technical lock picking tools to drive the unlocking wheel to rotate and unlock.

[0014] Furthermore, the outer end of the mounting sleeve is securely connected to the outer end of the connecting sleeve by fasteners.

[0015] By adopting the aforementioned technical solution, the outer end of the mounting sleeve is fastened to the outer end of the connecting sleeve with fasteners, while the inner end abuts against the second limiting part and cannot move outward, thereby improving the stability of the mounting sleeve, preventing the inner circumferential wall of the unlocking dial from being exposed and directly unlocked by technical means, and improving the safety performance of the lock cylinder mechanism.

[0016] Furthermore, the outer end of the connecting sleeve has an annular notch with an opening facing the inner lock cylinder and a connecting piece located outside the annular notch. The outer end of the mounting sleeve is provided with a fixing step, which is located in the annular notch. The connecting piece covers the outer end face of the fixing step, and the outer peripheral wall of the fixing step is flush with the outer peripheral wall of the connecting sleeve and the outer peripheral wall of the unlocking dial. The fixing step is fastened to the connecting sleeve by fasteners.

[0017] The aforementioned technical solution involves an annular notch at the outer end of the connecting sleeve and a fixed step at the outer end of the mounting sleeve. The annular notch accommodates the fixed step, facilitating its installation. A connecting piece shields the outer end face of the fixed step, reducing the risk of the user directly damaging the fixed step after destroying the outer lock cylinder, thus affecting the security performance of the mounting sleeve. Furthermore, the outer peripheral walls of the fixed step, the unlocking wheel, and the connecting sleeve are flush, thereby shielding the outer end of the unlocking wheel through the fixed step. This prevents unauthorized unlocking by thieves using tools to rotate the unlocking wheel in the event of damage to the outer lock cylinder. This improves the anti-riot security performance of the lock cylinder mechanism. The fixed step is securely connected to the connecting sleeve via fasteners, enhancing the stability of the mounting sleeve.

[0018] Furthermore, the unlocking dial includes an unlocking part and a mounting part. The inner wall of the mounting part is provided with a protrusion, and the outer wall of the inner transmission component is provided with a slot. The protrusion is inserted into the slot so that the inner transmission component is connected to the mounting part in a transmission connection.

[0019] By adopting the aforementioned technical solution, the unlocking dial is configured to form an unlocking wall and a mounting part. A protrusion is then provided on the inner wall of the mounting part. The protrusion is inserted into the slot on the inner transmission component to ensure the stability of the transmission between the inner transmission component and the unlocking dial, thereby improving the smoothness of the user's normal unlocking when using the key.

[0020] Furthermore, the inner transmission component is provided with a pushing component, the inner end of which abuts against the elastic element and the outer end of which abuts against the inner end face of the outer transmission component to keep the outer transmission component moving outward. The inner transmission component has a limiting ring surface that restricts the outward movement of the pushing component.

[0021] By adopting the aforementioned technical solution, a pushing member is set on the inner transmission component. The outer end of the pushing member abuts against the inner end face of the outer transmission component, and then the pushing member is abutted outward by an elastic element. This ensures that when the outer lock cylinder is violently damaged and missing, the outer transmission component moves outward so that it can no longer drive the inner transmission component, thereby improving the security performance of the lock cylinder mechanism against technical unlocking. A limiting ring surface is set on the inner transmission component to restrict the outward movement of the pushing member and prevent the pushing member from excessively pushing the outer transmission component outward and colliding with the outer lock cylinder.

[0022] Furthermore, the inner transmission member is provided with a first through hole and a second through hole located inside the first through hole and having a diameter larger than the first through hole. The limiting ring surface is located between the first through hole and the second through hole. The pushing member has a limiting rib, which abuts against the limiting ring surface to limit the pushing member in the inward and outward directions.

[0023] By adopting the aforementioned technical solution, a first through hole and a second through hole are provided on the inner transmission component, and a limiting ring surface is formed between the first through hole and the second through hole. By abutting the limiting ring surface with the limiting rib on the push component, the range of outward movement of the push component is limited, thereby improving the stability of the push component and preventing the push component from detaching from the inner transmission component under the action of the elastic element.

[0024] To achieve the above objectives, the present invention also adopts the following technical solution: a lock, comprising a lock body and the aforementioned lock cylinder mechanism.

[0025] By adopting the aforementioned technical solution, the lock cylinder mechanism is installed on the lock cylinder. When the outer lock cylinder body is forcibly destroyed and missing, the mounting sleeve and internal transmission components shield the inner circumferential wall of the unlocking wheel, preventing the inner circumferential wall of the unlocking wheel from being exposed and thus allowing for technical unlocking by brute force, thereby improving the lock's anti-riot security performance. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 is a schematic diagram of a lock cylinder mechanism according to the present invention;

[0028] Figure 2 is an overall cross-sectional view of the lock cylinder mechanism in this utility model;

[0029] Figure 3 is an enlarged view of point A in Figure 2 of this utility model;

[0030] Figure 4 is a schematic diagram of the installation of the external transmission component and the unlocking component of this utility model;

[0031] Figure 5 is a schematic diagram of the unlocking component of this utility model in the unlocked state;

[0032] Figure 6 is an exploded view of the mounting sleeve, unlocking dial, and internal transmission component in this utility model;

[0033] Figure 7 is a schematic diagram of the pusher and the limiting member of this utility model;

[0034] Figure 8 is a structural schematic diagram of the outer lock cylinder housing and the connecting sleeve in this utility model. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0036] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0037] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0038] As shown in Figures 1 and 2, this utility model provides a lock cylinder mechanism, including an outer lock cylinder body 1, an inner lock cylinder body 2, and a connecting sleeve 3 that fixes the outer lock cylinder body 1 and the inner lock cylinder body 2. The connecting sleeve 3 improves the stability of the connection between the outer lock cylinder body 1 and the inner lock cylinder body 2. The connecting sleeve 3 is provided with an unlocking dial 4 for unlocking. An external transmission component 5 is provided inside the connecting sleeve 3. One end of the external transmission component 5 is connected to the unlocking dial 4, and the other end is connected to the outer lock cylinder body 1, ensuring that when the user uses a key to rotate the outer lock cylinder body 1, it can drive the unlocking dial 4 to rotate. The mechanism unlocks the lock. Specifically, as shown in Figures 2 and 3, the inner end of the inner transmission component 6 is eccentrically equipped with an unlocking component 51. The inner lock core 2 and the unlocking dial 4 are connected via the inner transmission component 6. The outer end of the inner transmission component 6 is provided with an unlocking groove 62 corresponding to the unlocking component 51. The axis of the unlocking groove 62 is also eccentrically set relative to the axis of the inner transmission component 6. An elastic element 551 is provided between the inner transmission component 6 and the outer transmission component 5. The inner end of the elastic element 551 abuts against the inner lock core 2, and the outer end pushes the outer transmission component 5 outward. The outer transmission component 5 is driven by the elastic element. A bias voltage of 551 maintains the separation tendency of the unlocking member 51 and the unlocking groove 62. The key unlocking process of the outer lock cylinder 1 triggers the outer transmission member 5 to move towards the inner lock cylinder 2, causing the unlocking member 51 and the unlocking groove 62 to engage. Specifically, when the unlocking member 51 engages with the unlocking groove 62, the unlocking member 51 is in the unlocked state; when the unlocking member 51 separates from the unlocking groove 62, the unlocking member 51 is in the initial state, as shown in Figure 3. It should be noted that in this embodiment, the outer transmission member 5 only engages when the key is inserted into the outer lock cylinder 1 and abuts against the outer end of the outer transmission member 5. Only when the key is continuously inserted can the unlocking component 51 move inward until it engages with the unlocking slot 62. When the key is not inserted, the unlocking component 51 remains in its initial state of being separated from the unlocking slot 62. When a locksmith uses a lock-picking tool to unlock the lock, it is difficult to push the external transmission component 5 inward with the lock-picking tool, causing the unlocking component 51 to remain separated from the unlocking slot 62. Although the locksmith can rotate the outer lock cylinder 1, it is difficult to switch the unlocking component 51 from its initial state to the unlocked state, thereby improving the lock cylinder's security performance against lock picking.

[0039] In this embodiment, as shown in Figures 3 and 4, to ensure that the unlocking member 51 can be inserted into the unlocking slot 62, the inner end of the outer transmission member 5 is provided with a receiving slot 52 that can accommodate the unlocking member 51. An elastic member 53 is provided inside the receiving slot 52, located on the outer side of the unlocking member 51. The elastic member 53 pushes the unlocking member 51 inward, causing the inner end of the unlocking member 51 to protrude from the inner end face of the outer transmission member 5, ensuring that the unlocking member 51 can be inserted into the unlocking slot 62 during the inward movement of the outer transmission member 5. When the unlocking member 51 and the unlocking slot 62 are not aligned in the inward or outward direction, when the outer transmission member 5 drives the unlocking member 51 to move inward, the unlocking member 51... The inner end of the key 1 abuts against the outer end face of the inner transmission member 6. As the outer transmission member 5 moves inward, the unlocking member 51 compresses the elastic member 53, making the inner end face of the unlocking member 51 flush with the inner end face of the outer transmission member 5. After the key is inserted into place, it drives the outer lock cylinder 1 and the outer transmission member 5 to rotate. When the unlocking member 51 is aligned with the unlocking groove 62, the unlocking member 51 extends out of the receiving groove 52 under the action of the elastic member 53 and inserts into the unlocking groove 62, so that the outer transmission member 5 and the inner transmission member 6 can be driven by the insertion of the unlocking member 51 and the unlocking groove 62, avoiding the unlocking member 51 and the unlocking groove 62 from deflecting and affecting the unlocking and locking of the lock cylinder mechanism.

[0040] To prevent the unlocking component 51 from completely disengaging from the receiving groove 52, as shown in Figure 4, the inner end face of the outer transmission component 5 is provided with a receiving step 54, and a blocking plate 541 is fixed on the receiving step 54. The blocking plate 541 is provided with a through hole coaxial with the receiving groove 52. The unlocking component 51 is provided with a limiting step 511. The unlocking component 51 passes through the blocking plate 541 and is located in the through hole. Under the push of the elastic member 53, the limiting step 511 abuts against the outer surface of the blocking plate 541 to stabilize the unlocking component 51 in the receiving groove 52, thereby limiting the length of the unlocking component 51 protruding from the inner end face of the outer transmission component 5. This ensures that when the key is not inserted into the outer lock cylinder 1, the unlocking component 51 cannot completely disengage from the receiving groove 52 under the blocking of the blocking plate 541, thus improving the stability of the unlocking component 51 in the receiving groove 52.

[0041] In another embodiment, as shown in FIG3, the connecting sleeve 3 is provided with a mounting sleeve 31. The inner end of the mounting sleeve 31 is provided with a first limiting part 312, and the outer end of the inner transmission member 6 is provided with a second limiting part 61. The outer side wall of the first limiting part 312 abuts against the inner side wall of the second limiting part 61 to fix the mounting sleeve 31 in the inward and outward directions, so that the mounting sleeve 31 and the inner transmission member 6 cover the inner peripheral wall of the unlocking dial 4. Specifically, the mounting sleeve 31 has a first socket hole 311, the first limiting part 312 is located on the hole wall of the first socket hole 311, and the second limiting part 61 is located on the hole wall of the first socket hole 311. When the mounting sleeve 31 is fitted onto the inner transmission member 6 on the outer peripheral wall of the outer transmission member 5, it slides outward relative to the inner transmission member 6. When the outer side wall of the first limiting part 312 abuts against the inner side wall of the second limiting part 61, the second limiting part 61 prevents the inner transmission member 6 from sliding outward, improving the stability of the mounting sleeve 31 and the inner transmission member 6 in blocking the inner peripheral wall of the unlocking wheel 4. This prevents the inner peripheral wall of the unlocking wheel 4 from being exposed after the technical unlocking personnel forcibly remove the outer lock cylinder 1, and allows the unlocking tool to directly drive the unlocking wheel 4 to rotate, thereby improving the safety performance of the lock cylinder mechanism. With the second limiting part 61 at the outer end of the inner transmission member 6, the unlocking groove 62 is located on the second limiting part 61, ensuring that the unlocking member 51 has a relatively long torque to drive the inner transmission member 6 to rotate, thus facilitating the user to drive the unlocking wheel 4 to rotate and unlock.

[0042] To improve the stability of the mounting sleeve 31, as shown in Figure 5, the outer end of the mounting sleeve 31 is fastened to the outer end of the connecting sleeve 3 by fasteners. With the inner end of the mounting sleeve 31 and the inner transmission member 6 fixed in the inward and outward directions, the fixation of the outer end of the mounting sleeve 31 improves the connection strength between the mounting sleeve 31, the inner transmission member 6, and the connecting sleeve 3, reducing the possibility of the lock cylinder mechanism being unlocked by technical means. In another embodiment, as shown in Figure 5, the outer end of the connecting sleeve 3 has an annular notch 32 with an opening facing the inner lock cylinder 2 and a connecting piece 321 located outside the annular notch 32. The outer end of the mounting sleeve 31 is provided with a fixing step 314. The inner end of the mounting sleeve 31 is connected to the inner transmission member 6, and the fixing step 314 at the outer end is accommodated in the annular notch 32. The fixing step 314 is then fastened to the connecting sleeve 3 by fasteners, which improves the connection strength between the outer end of the mounting sleeve 31 and the connecting sleeve 3. After the fixing step 314 is accommodated in the annular notch 32, the connecting piece 321 covers the outer end face of the fixing step 314, preventing the person who forcibly unlocks the lock from further damaging the outer end of the mounting sleeve 31 after damaging the outer lock cylinder 1. After the mounting sleeve 31 is stably installed, the outer periphery of the fixing step 314 is flush with the outer periphery of the connecting sleeve 3 and the outer periphery of the unlocking dial 4, so that the connecting piece 321 and the fixing step 314 cover the outer end face of the unlocking dial 4, preventing the possibility of the person who forcibly unlocks the lock by technically rotating the unlocking dial 4.

[0043] To ensure that the inner transmission component 6 can drive the unlocking dial 4 to rotate, as shown in Figure 6, the unlocking dial 4 includes an unlocking part 41 and a mounting part 42. The mounting part 42 is located inside the unlocking part 41. The unlocking part 41 has a first connecting hole 411, and the mounting part 42 has a second connecting hole 421 with an inner diameter smaller than the first connecting hole 411. The hole wall of the second connecting hole 421 has a protrusion 422 protruding towards the axis of the mounting part 42. The outer peripheral wall of the inner transmission component 6 is provided with a groove 63, which is located inside the second limiting part 61. The protrusion 422 is inserted into the groove 63. When the outer transmission component 5 or the inner lock core 2 drives the inner transmission component 6 to rotate, it drives the mounting part 42 to rotate, thereby driving the unlocking part 41 to rotate and unlock. The insertion of the protrusion 422 into the groove 63 ensures that the unlocking dial 4 can be driven to rotate and unlock through the inner transmission component 6. In this embodiment, the inner diameter of the second connecting hole 421 is set to be smaller than the inner diameter of the first connecting hole 411, so as to ensure that the mounting part 42 can abut against the inner end face of the mounting sleeve 31, and to prevent the mounting part 42 from sliding outward and affecting the stability of the unlocking dial 4.

[0044] In another embodiment, to ensure that the outer transmission member 5 has a tendency to move outward and disengage from the inner transmission member 6, as shown in Figures 3 and 7, the inner transmission member 6 is provided with a pusher 7, and the outer end of the pusher 7 abuts against the inner end face of the outer transmission member 5. The inner end of the pusher 7 abuts against the elastic element 71, and the outer end abuts against the inner end face of the outer transmission member 5 so that the outer transmission member 5 maintains an outward tendency, ensuring that the transmission connection between the outer transmission member 5 and the inner transmission member 6 is disengaged when the unlocking member 51 is in the initial state, thereby improving the safety performance of the lock cylinder mechanism.

[0045] In this embodiment, the inner transmission member 6 has a limiting ring surface 641 that restricts the outward movement of the push member 7. Specifically, as shown in FIG7, the inner transmission member 6 is provided with a first through hole 64 and a second through hole 65 located inside the first through hole 64 and having a diameter larger than the first through hole 64. The limiting ring surface 641 is located between the first through hole 64 and the second through hole 65. The push member 7 has a limiting rib 72. The elastic element 71 abuts against the push member 7 outward. The limiting rib 72 abuts against the limiting ring surface 641 to limit the push member 7 in the inner and outer directions, so as to prevent the push member 7 from excessively pushing the outer transmission member 5 outward and colliding with the outer lock core 1.

[0046] In another embodiment, the present invention also provides a lock, including a lock body and a lock cylinder mechanism as described in the above embodiment. The lock cylinder mechanism is disposed on the lock body. When the outer lock cylinder 1 is technically opened, it is difficult for the technical unlocking tool to push the outer transmission member 5 inward, and the unlocking member 51 is difficult to switch from the initial state to the unlocked state, thereby improving the security performance of the lock cylinder.

[0047] In the event of forced entry, the lock picker might inject a refrigerant into the outer lock cylinder 1. As the outer lock cylinder 1 freezes, it gradually becomes brittle. At this point, the lock picker can use pliers or other tools to grip the outer lock cylinder 1 and pull forcefully. The brittle outer lock cylinder 1 will then break relative to the connecting sleeve 3. In this situation, the outer transmission component 5 will slide outwards and detach from the connecting sleeve 3, exposing the inner transmission component 6. The lock picker can then use a lock-picking tool to rotate the inner transmission component 6, thereby unlocking the lock.

[0048] To prevent unauthorized unlocking by forcibly disassembling the outer lock cylinder 1 and exposing the inner transmission component 6, as shown in Figure 7, in this embodiment, the outer end of the mounting sleeve 31 is provided with a limiting hole 313, and the outer transmission component 5 is provided with a limiting member 55 protruding from the outer peripheral wall of the outer transmission component 5. When the outer lock cylinder 1 is forcibly damaged and missing, the outer transmission component 5 moves outward. When the limiting member 55 is aligned with the limiting hole 313, the limiting member 55 protrudes from the outer peripheral wall of the outer transmission component 5 and is inserted into the limiting hole 313, thus restricting the movement of the outer transmission component 6. The axial movement of the transmission component 5, and the insertion of the limiting component 55 into the limiting hole 313, also restricts the rotation of the outer transmission component 5. At this time, the person who forcibly unlocks the lock cannot drive the outer transmission component 5 to rotate, and thus cannot drive the inner transmission component 6 to rotate and unlock. By inserting the limiting component 55 into the limiting hole 313, the outer transmission component 5 is prevented from detaching from the mounting sleeve 31 as the outer lock core 1 is detached, so that the outer transmission component 5 is blocked on the outside of the inner transmission component 6, thus preventing the possibility of the person who forcibly unlocks the lock from using tools to technically drive the inner transmission component 6 to rotate and unlock. More specifically, there are two limiting holes 313, which are distributed on both sides of the outer transmission member 5. There are two corresponding limiting members 55. A third elastic member 551 is provided between the two limiting members 55. When the limiting hole 313 is aligned with the limiting member 55, the third elastic member 551 abuts against the two limiting members 55, causing both limiting members 55 to protrude from the outer transmission member 5 and be inserted into the limiting hole 313. This ensures that the outer transmission member 5 is locked on the mounting sleeve 31, preventing the inner transmission member 6 from being exposed. In another embodiment, a limiting ring can also be provided at the outer end of the mounting sleeve 31. When the limiting member 55 is inserted into the limiting ring, it can ensure that the unlocking member 51 is completely disengaged from the unlocking groove 62. The outer transmission member 5 is still blocked at the outer end of the inner transmission member 6. The person who forcibly unlocks the lock can drive the outer transmission member 5 to rotate, but the outer transmission member 5 cannot drive the inner transmission member 6 to rotate and unlock. This creates the illusion that the lock can be unlocked by the person who forcibly unlocks the lock, but in reality, it cannot drive the inner transmission member 6 to rotate and unlock, thereby improving the safety performance of the lock cylinder mechanism.

[0049] In this embodiment, the outer end of the connecting sleeve 3 has an annular notch 32 and a connecting piece 321. The annular notch 32 accommodates the fixing step 314 of the mounting sleeve 31, and the connecting piece 321 covers the outside of the fixing step 314. When a person forcibly disassembles the outer lock cylinder 1, the connecting piece 321 is removed first. The inner end of the mounting sleeve 31 is limited by the first limiting part 312 and the inner transmission member 6, and the outer end is tightly connected to the connecting sleeve 3 through the fixing step 314, which improves the connection strength of the mounting sleeve 31 and increases the difficulty of forcibly disassembling the fixing step 314, thereby improving the anti-riot safety performance of the lock cylinder mechanism. Furthermore, the outer peripheral wall of the fixing step 314 is flush with the outer peripheral wall of the connecting sleeve 3 and the outer peripheral wall of the unlocking dial 4, so that the fixing step 314 covers the outside of the unlocking dial 4, preventing the person forcibly disassembling the lock cylinder from directly rotating the unlocking dial 4 and causing the lock cylinder to be technically unlocked.

[0050] Furthermore, when the locking mechanism is riot-proof with limiting holes 313 and limiting members 55, the fracture location of the outer lock cylinder body 1 when subjected to violent damage can also be limited; specifically, as shown in Figure 8, the connecting sleeve 3 includes an inner connecting part 34 and an outer connecting part 33, and a receiving notch for accommodating the unlocking dial 4 is formed between the inner connecting part 34 and the outer connecting part 33. The outer lock cylinder body 1 has an outer lock cylinder housing 11, which is integrally formed with the outer end of the outer lock cylinder housing 11 and the outer end of the outer connecting part 33. The size of the outer end of the outer connecting part 33 is smaller than the size of the inner end of the outer connecting part 33, so that the outer lock cylinder housing 11 and the outer end of the outer connecting part 33 are integrally formed. A stress step 111 is formed between the ends; specifically, the outer peripheral wall of the outer end of the outer connecting part 33 is provided with a stress groove, and one side of the groove wall is located on the inner end face of the outer lock cylinder housing 11. The stress groove makes the size of the outer end of the outer connecting part 33 smaller than the size of the inner end of the outer connecting part 33, so that one side of the groove wall forms a stress step 111, ensuring that when the outer lock cylinder 1 is violently disassembled and broken, the breakage location is at the stress step 111, thereby ensuring that when the outer lock cylinder 1 is missing, the outer connecting part 33 blocks the outside of the unlocking dial 4, preventing violent unlocking personnel from using tools to turn the unlocking dial 4 to unlock. In another embodiment, an inclined surface 331 can be provided at the outer end of the outer connecting part 33. The inclined surface 331 makes the size of the outer end of the outer connecting part 33 gradually increase from the outside to the inside. The outermost end of the inclined surface 331 forms a stress step 111 between it and the outer lock cylinder housing 11. This ensures that the breakage location of the outer lock cylinder when it is violently damaged is at the outer end of the outer connecting part 33, avoiding the breakage at the middle of the connecting sleeve 3, which would allow a violent unlocking person to technically turn the unlocking dial 4 to unlock the lock. In this embodiment, the setting of the inclined surface 331 ensures that when the outer lock cylinder body 1 is missing, the violent unlocking person cannot hold the outer connecting part 33 stably, increasing the difficulty for the violent unlocking person to further violently disassemble the outer connecting part 33, thereby improving the safety performance of the anti-riot lock cylinder.

[0051] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A lock cylinder mechanism, comprising an outer lock cylinder body, an inner lock cylinder body, and a connecting sleeve for fixing the outer lock cylinder body and the inner lock cylinder body, wherein the connecting sleeve is provided with an unlocking dial for unlocking, and an external transmission component is provided inside the connecting sleeve, one end of the external transmission component being throttle-connected to the unlocking dial and the other end being throttle-connected to the outer lock cylinder body, characterized in that, The inner end of the external transmission component is eccentrically provided with an unlocking component. The inner lock core and the unlocking dial are connected by the internal transmission component. The outer end of the internal transmission component is provided with an unlocking groove corresponding to the unlocking component. The external transmission component is biased by an elastic element to maintain the separation tendency of the unlocking component and the unlocking groove. The key unlocking process of the outer lock core triggers the external transmission component to move towards the inner lock core, so that the unlocking component and the unlocking groove are engaged.

2. The lock cylinder mechanism according to claim 1, characterized in that, The inner end of the external transmission component is provided with a receiving groove for accommodating the unlocking component. An elastic element is provided in the receiving groove, and the elastic element pushes the unlocking component inward so that the unlocking component protrudes from the inner end face of the external transmission component.

3. The lock cylinder mechanism according to claim 2, characterized in that, The inner end face of the external transmission component is provided with a receiving step, the unlocking component is provided with a limiting step, a blocking plate is fixed on the receiving step, the unlocking component passes through the blocking plate, and the limiting step abuts against the blocking plate to stabilize the unlocking component in the receiving groove.

4. The lock cylinder mechanism according to claim 1, characterized in that, The connecting sleeve is provided with an installation sleeve. The inner end of the installation sleeve is provided with a first limiting part, and the outer end of the inner transmission component is provided with a second limiting part. The outer side wall of the first limiting part abuts against the inner side wall of the second limiting part to fix the installation sleeve in the inward and outward directions. The installation sleeve and the inner transmission component cover the inner peripheral wall of the unlocking dial.

5. The lock cylinder mechanism according to claim 4, characterized in that, The outer end of the mounting sleeve is fastened to the outer end of the connecting sleeve by fasteners.

6. The lock cylinder mechanism according to claim 4, characterized in that, The outer end of the connecting sleeve has an annular notch with an opening facing the inner lock cylinder and a connecting piece located outside the annular notch. The outer end of the mounting sleeve is provided with a fixed step, which is located in the annular notch. The connecting piece covers the outer end face of the fixed step, and the outer peripheral wall of the fixed step is flush with the outer peripheral wall of the connecting sleeve and the outer peripheral wall of the unlocking dial. The fixed step is fastened to the connecting sleeve by fasteners.

7. The lock cylinder mechanism according to claim 1, characterized in that, The unlocking dial includes an unlocking part and a mounting part. The inner wall of the mounting part is provided with a protrusion, and the outer wall of the inner transmission component is provided with a slot. The protrusion is inserted into the slot so that the inner transmission component is connected to the mounting part in a transmission connection.

8. The lock cylinder mechanism according to claim 1, characterized in that, The inner transmission component is provided with a pusher, the inner end of which abuts against the elastic element and the outer end of which abuts against the inner end face of the outer transmission component to keep the outer transmission component moving outward. The inner transmission component has a limiting ring surface that restricts the pusher from moving outward.

9. The lock cylinder mechanism according to claim 8, characterized in that, The internal transmission component has a first through hole and a second through hole located inside the first through hole and having a diameter larger than the first through hole. The limiting ring surface is located between the first through hole and the second through hole. The pushing component has a limiting rib, which abuts against the limiting ring surface to limit the pushing component in the inward and outward directions.

10. A lock, characterized in that, It includes a lock body and a lock cylinder mechanism as described in any one of claims 1 to 9.

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