Idling lock cylinder
By designing a free-spinning lock cylinder, which uses a free-spinning stop and a sealing pin to limit the depth of screwdriver insertion, and combining key control of the clutch mechanism with the electric mechanism, the problem of easy damage to the lock cylinder is solved, achieving high-efficiency anti-theft performance and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2026-03-13
AI Technical Summary
The lock cylinder of existing locks is easily damaged by others using screwdrivers or other tools, resulting in high costs and poor anti-theft performance.
A free-spinning lock cylinder was designed. By setting a free-spinning baffle and a sealing pin inside the lock shell, the insertion depth of the screwdriver is limited. An annular groove is set at the outer end of the lock cylinder to cooperate with the limiting hole, thereby enhancing the anti-theft performance. At the same time, the clutch mechanism is equipped with a moving head, a first clutch, a second clutch, and a transmission rod. The key is used to control the rotation of the clutch to realize the locking and unlocking. A second clutch is set inside the lock cylinder to prevent tool damage.
It effectively prevents the lock cylinder from being damaged, improves anti-theft performance and reliability, reduces the cost of replacing the lock cylinder, and is easy to assemble and use.
Smart Images
Figure CN223991663U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lock cylinder technology, specifically to a free-spinning lock cylinder. Background Technology
[0002] The primary function of a lock cylinder is to transmit torque through its head, thereby actuating other lock components to achieve locking and unlocking. Existing lock cylinders include a lock case, a dial, a clutch mechanism, and a lock cylinder. A matching mechanical key controls the lock cylinder and clutch mechanism, which in turn control the bolt via the dial to achieve locking and unlocking. When the lock cylinder is installed in an automatic door lock, the automatic door lock's electric mechanism controls the bolt via the clutch mechanism and dial to achieve locking and unlocking. During operation, the electric mechanism operates independently of the lock cylinder, thanks to the clutch mechanism. However, the lock cylinder in existing lock cylinders is easily damaged by unauthorized individuals who attempt to forcibly unlock it by inserting a screwdriver or other tools through the lock panel. This damage necessitates replacement of the lock cylinder, resulting in high costs. Utility Model Content
[0003] Based on the above problems, the purpose of this utility model is to provide a free-spinning lock cylinder that can protect the lock cylinder from damage and has good anti-theft performance.
[0004] To address the above problems, the following technical solution is provided: a free-spinning lock cylinder, comprising a lock shell, a dial, and a lock cylinder. The lock shell has a mounting hole for installing the lock cylinder. The lock cylinder has a lock hole coaxially formed with respect to the mounting hole. A free-spinning baffle is provided at the outer end of the lock cylinder within the mounting hole. The end of the free-spinning baffle has a lock opening corresponding to the lock hole. An annular groove is formed on the outer circumferential wall of the free-spinning baffle. A limiting hole is formed on the lock shell in the radial direction relative to the annular groove. A sealing pin inserted into the annular groove is installed in the limiting hole.
[0005] In the above structure, by setting a free-spinning stop ring, when someone passes a screwdriver or other tool through the lock cylinder, the free-spinning stop plate and the thickness of the door lock panel reduce the depth of screwdriver insertion. This allows the free-spinning stop plate to rotate freely relative to its axial direction when someone turns the screwdriver, thus preventing damage to the lock cylinder and improving the anti-theft performance of this invention. The annular groove, in cooperation with the sealing pin, limits the axial direction of the free-spinning stop plate, thereby improving its stability and the reliability of this invention. The limiting hole facilitates the installation of the sealing pin, thus improving the ease of assembly of this invention.
[0006] The present invention is further configured such that the sealing pin is screwed or riveted into the limiting hole.
[0007] With the above structure, the replacement of the idle stop plate can be facilitated by screwing the sealing pin into the limiting hole; by riveting the sealing pin into the limiting hole, the connection strength between the sealing pin and the lock housing can be improved, thereby increasing the stress strength of the sealing pin.
[0008] The present invention is further provided that the mounting hole has a positioning groove that abuts against the axial direction of the idling baffle.
[0009] In the above structure, the positioning groove facilitates the positioning and installation of the idle baffle, thereby improving the assembly efficiency of this utility model.
[0010] The present invention is further configured to include a clutch mechanism, which includes a coaxially arranged movable head, a first clutch component, a second clutch component, a transmission rod, a first return spring, and a second return spring. The two ends of the dial are respectively rotatably sleeved on the end of the movable head and the end of the lock cylinder. The dial has through holes corresponding to and cooperating with the first and second clutch components. The movable head has a receiving groove for accommodating the first clutch component. Both the first and second clutch components have locking blocks arranged radially on their outer circumferential walls. The receiving groove, the inner walls of the through holes, and the end of the lock cylinder are all provided with... There is a corresponding slot for the locking block, and the slot at the through hole is through-hole. The first clutch and the second clutch are rotatably sleeved on the transmission rod. The first return spring is sleeved on the transmission rod and located inside the second clutch. The end of the transmission rod is provided with a limiting plate that abuts against the first return spring. The second return spring is located in the receiving groove and abuts against the end face of the first clutch and is coaxial with the transmission rod. The end of the second clutch facing the lock opening has a connection port in its radial direction. One end of the first clutch is located in the receiving groove and the other end is located in the through hole. The second clutch is located inside the lock cylinder.
[0011] In the above structure, a matching key is inserted into the lock cylinder's keyhole. After the key tip is inserted into the connector, it continues to be inserted forward, pushing the transmission rod to move the second clutch and the first clutch toward the movable head until the first clutch enters the receiving groove of the movable head. The key can no longer move forward, and the second clutch moves into the through hole of the dial wheel. Turning the key causes the second clutch's locking block to engage with the dial wheel's locking groove, enabling the second clutch to drive the dial wheel to rotate, thus unlocking and locking the door. After unlocking or locking, turning the key controls the second clutch's locking block to return to its corresponding locking groove in the lock cylinder. A second return spring generates an elastic return force on the first clutch, which in turn generates a pushing force on the second clutch. This ensures that when the key drives the second clutch to rotate and return to its original position, the locking block of the second clutch is accurately aligned with the locking groove in the lock cylinder, facilitating key removal. By setting a transmission rod, the coaxiality of the first and second clutch components and the stability of their displacement can be improved. The first return spring facilitates the return of the transmission rod and improves the feel when inserting the key, thus enhancing the reliability of this invention. By placing one end of the first clutch component in the receiving groove and the other end in the through hole, and the second clutch component in the lock cylinder, when this invention is installed on an automatic door lock, a movable paddle or other transmission component that drives the electric mechanism of the automatic door lock can be installed at the movable head. This allows the electric mechanism to drive the movable head via the movable paddle, controlling the first clutch component to rotate the dial wheel, thus unlocking or locking. This enables the electric mechanism to start quickly for unlocking or locking. By placing the second clutch component inside the lock cylinder, when someone uses tools to control the lock cylinder and rotate the second clutch component, the second clutch component cannot control the dial wheel without displacing itself from the lock cylinder, causing the lock cylinder to spin freely, thereby improving the anti-theft performance of this invention.
[0012] The present invention is further configured such that an anti-disengagement flange is provided at one end of the transmission rod located outside the first clutch component.
[0013] The above structure allows the transmission rod to also limit the first clutch component, thereby improving the stability and reliability of the clutch mechanism.
[0014] The present invention is further configured such that the locking blocks on the first clutch and the second clutch are symmetrically arranged in two sets relative to the axial direction of the dial wheel.
[0015] The above structure allows the key to be turned 180° to unlock or lock, and it also improves the structural strength of the first and second clutch components, thereby extending their service life and improving the reliability of this invention.
[0016] The present invention is further configured such that the movable head and the end of the lock cylinder are both engaged with retaining rings located on both sides of the dial.
[0017] By adopting the above structure, the dial can be limited, thereby improving the stability of the dial, preventing it from wobbling left and right, and improving the reliability of this utility model. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model.
[0019] Figure 2 This is a schematic diagram showing the disassembled structure of a portion of the present invention.
[0020] Figure 3 This is a cross-sectional structural diagram of the present invention.
[0021] Figure 4 This is a schematic diagram of the structure inside the lock shell in this utility model.
[0022] Figure 5 This is a schematic diagram of the disassembled structure of this utility model.
[0023] Figure 6 This is a schematic diagram of the structure of the clutch mechanism and the dial wheel in this utility model.
[0024] The labels in the diagram have the following meanings: 1-lock case; 2-shifting wheel; 3-lock cylinder; 11-mounting hole; 31-lock hole; 4-free-spinning stop; 41-lock opening; 42-annular groove; 12-limiting hole; 5-sealing pin; 13-positioning groove; 6-clutch mechanism; 61-moving head; 62-first clutch component; 63-second clutch component; 64-transmission rod; 65-first return spring; 66-second return spring; 21-through hole; 621-accommodating groove; 01-block; 02-slot; 641-limiting plate; 631-connecting port; 642-anti-detachment flange; 7-ring snap. Detailed Implementation
[0025] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0027] like Figures 1 to 6The lock cylinder shown includes a lock housing 1, a dial 2, and a lock cylinder 3. The lock housing 1 has a mounting hole 11 for installing the lock cylinder 3. The lock cylinder 3 has a lock hole 31 coaxially with respect to the mounting hole 11. An idler plate 4 is provided at the outer end of the lock cylinder 3 in the mounting hole 11. The end of the idler plate 4 has a lock opening 41 corresponding to the lock hole 31. An annular groove 42 is provided on the outer circumferential wall of the idler plate 4. A limiting hole 12 is provided on the lock housing 1 in the radial direction relative to the annular groove 42. A sealing pin 5 is installed in the limiting hole 12 and inserted into the annular groove 42.
[0028] In the above structure, by setting a free-spinning stop ring, when someone passes a screwdriver or other tool through the lock opening 41, the free-spinning stop 4 and the thickness of the door lock panel reduce the depth of screwdriver insertion. This allows the free-spinning stop 4 to rotate freely relative to its axial direction when someone rotates the screwdriver, thus preventing damage to the lock cylinder 3 and improving the anti-theft performance of this utility model. The annular groove 42, in cooperation with the sealing pin 5, can limit the axial direction of the free-spinning stop 4, thereby improving the stability of the free-spinning stop 4 and enhancing the reliability of this utility model. The limiting hole 12 facilitates the installation of the sealing pin 5, thereby improving the ease of assembly of this utility model.
[0029] In this embodiment, the sealing pin 5 is screwed or riveted into the limiting hole 12.
[0030] With the above structure, the screw connection between the sealing pin 5 and the limiting hole 12 facilitates the replacement of the idle stop plate 4; by riveting the sealing pin 5 into the limiting hole 12, the connection strength between the sealing pin 5 and the lock shell 1 can be improved, thereby improving the stress strength of the sealing pin 5.
[0031] In this embodiment, a positioning groove 13 is provided in the mounting hole 11 that abuts against the axial direction of the idle baffle 4.
[0032] In the above structure, the positioning groove 13 facilitates the positioning and installation of the idle baffle 4, thereby improving the assembly efficiency of this utility model.
[0033] In this embodiment, a clutch mechanism 6 is also included. The clutch mechanism 6 includes a coaxially arranged movable head 61, a first clutch 62, a second clutch 63, a transmission rod 64, a first return spring 65, and a second return spring 66. The two ends of the dial 2 are respectively rotatably sleeved on the end of the movable head 61 and the end of the lock cylinder 3. The dial 2 has a through hole 21 that corresponds to and cooperates with the first clutch 62 and the second clutch 63. The movable head 61 has a receiving groove 621 for accommodating the first clutch 62. The outer circumferential walls of the first clutch 62 and the second clutch 63 are each provided with a locking block 01 arranged in a radial direction relative to them. The inner walls of the receiving groove 621, the through hole 21, and the end of the lock cylinder 3 are all provided with corresponding locking blocks 01. The corresponding slot 02 is through the through hole 21. The first clutch 62 and the second clutch 63 are rotatably sleeved on the transmission rod 64. The first return spring 65 is sleeved on the transmission rod 64 and located inside the second clutch 63. The end of the transmission rod 64 is provided with a limiting plate 641 that abuts against the first return spring 65. The second return spring 66 is located in the receiving groove 621 and abuts against the end face of the first clutch 62, and is coaxially arranged with the transmission rod 64. The end of the second clutch 63 facing the lock opening 41 has a connection port 631 in its radial direction. One end of the first clutch 62 is located in the receiving groove 621 and the other end is located in the through hole 21. The second clutch 63 is located inside the lock cylinder 3.
[0034] In the above structure, a matching key is inserted into the lock hole 31 of the lock cylinder 3. After the end of the key is inserted into the connection port 631, it is continued to be inserted forward, pushing the transmission rod 64 to drive the second clutch 63 and the first clutch 62 to move towards the movable head 61 until the first clutch 62 enters the receiving groove 621 of the movable head 61, at which point the key can no longer move forward. The second clutch 63 moves into the through hole 21 of the dial wheel 2. When the key is turned, the locking block 01 of the second clutch 63 cooperates with the locking groove 02 of the dial wheel 2, realizing that the second clutch 63 drives the key to move forward. Rotating the dial 2 unlocks and locks the door. After unlocking or locking, turning the key controls the second clutch 63's locking block 01 to align with the lock cylinder 3's slot 02 for reset. The second return spring 66 provides an elastic reset force to the first clutch 62, which in turn provides a pushing force to the second clutch 63. This ensures that when the key rotates the second clutch 63, the locking block 01 of the second clutch 63 accurately aligns with the lock cylinder 3's slot 02, facilitating key removal. The transmission rod 64 improves the coaxiality of the first and second clutches 62 and the stability of their displacement. The first return spring 65 facilitates the reset of the transmission rod 64 and improves the feel of key insertion, thus enhancing the reliability of this invention. By placing one end of the first clutch 62 within the receiving groove 621 and the other end within the through hole 21, and the second clutch 63 within the lock cylinder 3, when this invention is installed on an automatic door lock, a movable paddle or other transmission component that drives the electric mechanism of the automatic door lock can be installed at the movable head 61. This allows the electric mechanism to drive the movable head 61 via the movable paddle, controlling the first clutch 62 to rotate the dial wheel 2, thus unlocking or locking. This enables the electric mechanism to start quickly for unlocking or locking. By placing the second clutch 63 within the lock cylinder 3, when someone uses a tool to control the lock cylinder 3 and rotate the second clutch 63, the second clutch 63 cannot control the dial wheel 2 to rotate without displacing itself from the lock cylinder 3, causing the lock cylinder 3 to spin freely, thereby improving the anti-theft performance of this invention.
[0035] In this embodiment, the transmission rod 64 is provided with an anti-disengagement flange 642 at one end located outside the first clutch member 62.
[0036] The above structure allows the transmission rod 64 to limit the first clutch element 62, thereby improving the stability and reliability of the clutch mechanism 6.
[0037] In this embodiment, the locking blocks 01 on the first clutch 62 and the second clutch 63 are symmetrically arranged in two sets relative to the axial direction of the dial wheel 2.
[0038] The above structure allows the key to be turned 180° to unlock or lock, and also improves the structural strength of the first clutch 62 and the second clutch 63, thereby extending their service life and improving the reliability of this utility model.
[0039] In this embodiment, the movable head 61 and the end of the lock cylinder 3 are both engaged with retaining rings 7 located on both sides of the dial 2.
[0040] By adopting the above structure, the dial 2 can be limited, thereby improving the stability of the dial 2, preventing it from wobbling left and right, and improving the reliability of this utility model.
[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.
Claims
1. A kind of idle lock cylinder, comprising lock shell, dial and lock core, the installation hole for installing lock core is opened in the lock shell, the lock core is coaxially opened with lock hole relative to installation hole, it is characterized by: The mounting hole is provided with an idle baffle at the outer end of the lock cylinder, the end of the idle baffle is provided with a lock hole corresponding to the lock hole, an annular groove is formed in the outer circumferential wall of the idle baffle, a limiting hole is formed in the lock shell in the radial direction of the annular groove, and a sealing pin is mounted in the limiting hole and inserted into the annular groove.
2. A turn-and-bump cylinder according to claim 1, characterized in that: The sealing pin is screwed or riveted in the limiting hole.
3. A turn-and-burn lock cylinder according to claim 2, wherein: A positioning groove is formed in the mounting hole and abuts against the axial direction of the idle baffle.
4. The turn-and-bump cylinder according to claim 1, wherein: Further comprising a clutch mechanism, the clutch mechanism comprises a movable head, a first clutch member, a second clutch member, a transmission rod, a first return spring and a second return spring arranged coaxially, the dial is rotatably sleeved at the end of the movable head and the end of the lock cylinder, the dial is provided with a through hole corresponding to the first clutch member and the second clutch member, the movable head is provided with a containing groove containing the first clutch member, the outer circumferential wall of the first clutch member and the second clutch member is provided with a clamping block arranged in the radial direction, the inner wall of the containing groove and the through hole and the end of the lock cylinder are provided with a clamping groove corresponding to the clamping block, the clamping groove at the through hole is arranged in a through manner, the first clutch member and the second clutch member are rotatably sleeved on the transmission rod, the first return spring is sleeved on the transmission rod and located in the second clutch member, the end of the transmission rod is provided with a limiting plate abutting against the first return spring, the second return spring is located in the containing groove and abuts against the end face of the first clutch member, and the second return spring is arranged coaxially with the transmission rod, and the end of the second clutch member facing the lock hole is provided with a connecting hole in the radial direction.
5. A turn-and-bump cylinder according to claim 4, characterized in that: The end of the transmission rod outside the first clutch member is provided with an anti-dropping flange.
6. A turn-and-bump cylinder according to claim 5, characterized in that: The clamping blocks on the first clutch member and the second clutch member are symmetrically provided with two groups in the axial direction of the dial.
7. A turn-and-burn cylinder according to claim 4, wherein: The movable head and the end of the lock cylinder are clamped with clamping springs located on both sides of the dial.