Novel double-unlocking lock cylinder structure
By installing a central spring in the double-lock cylinder, the problem of mutual interference between sleeves in traditional lock cylinders is solved, achieving stable rotation of both lock cylinders and avoiding cylinder spinning and jamming.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-14
AI Technical Summary
In traditional double-lock cylinders, the two dial sleeves are directly fitted together, which can easily cause them to spin freely or get stuck during the unlocking process, affecting the normal operation of the lock cylinder.
A central spring is installed between the inner and outer gear wheel sleeves to ensure the sleeves are separated and avoid mutual interference. A tower-shaped spring is used as the inner, outer, and central springs.
Ensure that each lock cylinder rotates independently to avoid free-spinning and jamming, and guarantee that both lock cylinders can be opened normally.
Smart Images
Figure CN224120059U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lock cylinder technology, specifically a novel double-opening lock cylinder structure. Background Technology
[0002] Traditional pin tumbler locks hold a significant place in the world of locks. They consist of two lock cylinders mounted at both ends of a single lock body, each connected to a turntable via a rotating latch assembly. Inserting a key into either keyhole allows the lock cylinder to rotate by matching the pins and pushing the latch assembly to the other side, thus rotating the turntable and unlocking the door. This dual-cylinder design allows for easy unlocking from both inside and outside the door. However, in existing dual-cylinder locks, the two turntable sleeves connecting the two cylinders to the turntable are directly fitted together. During daily use, improper positioning of these sleeves can cause the lock cylinder to spin freely during unlocking, or the cylinder to jam due to interference from the other cylinder, preventing unlocking. Utility Model Content
[0003] In view of the problems existing in the prior art, this utility model discloses a novel double-opening lock cylinder structure. The technical solution adopted is that an inner lock cylinder and an outer lock cylinder are rotatably installed at both ends of the through hole in the middle of the lock body, respectively. A dial is rotatably installed between the inner lock cylinder and the outer lock cylinder. The dial is located at the middle groove of the lock body. An inner dial sleeve is snapped onto the end of the inner lock cylinder. An inner snap protrusion is fixedly connected axially on the outer circumferential wall of the inner dial sleeve. The inner snap protrusion is snapped into an inner lock cylinder groove opened on the side wall of the end of the inner lock cylinder. An outer dial sleeve is snapped onto the end of the outer lock cylinder. An outer snap protrusion is fixedly connected axially on the outer circumferential wall of the outer dial sleeve. The outer snap protrusion is snapped into an outer lock cylinder groove opened on the side wall of the end of the outer lock cylinder. A dial groove is opened on the inner side wall of the dial. The inner and outer buckle protrusions are respectively engaged in the dial slots. A central rotating shaft passes through the middle of the inner dial sleeve, and an inner spring passes through the central rotating shaft. One end of the inner spring presses against the inner end face of the inner dial sleeve, and the other end presses against the end of the central rotating shaft, so that the central rotating shaft presses against the inner lock cylinder. A rotating shaft sleeve passes through the middle of the outer dial sleeve, and an outer spring passes through the rotating shaft sleeve. One end of the outer spring presses against the inner end face of the outer dial sleeve, and the other end presses against the end of the rotating shaft sleeve, so that the rotating shaft sleeve presses against the outer lock cylinder. The central rotating shaft is rotatably inserted into the rotating shaft sleeve. In traditional lock cylinders, the inner and outer dial sleeves are directly connected, which is not easy to separate and can easily affect each other during the unlocking process, causing unlocking problems. This technical solution involves installing a central spring between the inner and outer gear cylinder sleeves. One end of the central spring presses against the inner gear cylinder sleeve end, and the other end presses against the outer gear cylinder sleeve end, thereby pressing the inner and outer gear cylinder sleeves against the inner and outer lock cylinders respectively.
[0004] In a preferred embodiment of this utility model, the inner spring, the middle spring, and the outer spring are all selected as tower-shaped springs.
[0005] The beneficial effects of this utility model are as follows: A spring is installed between the inner and outer dial sleeves to keep the two dial sleeves always separated. When the key is inserted into the lock cylinder on one side and the dial sleeve is pushed into the dial, it ensures that the dial sleeve on the other side is pushed out of the dial. This prevents the dial sleeve on the opposite side from affecting the lock cylinder and ensures stable contact between the dial sleeve on the side with the key inserted and the dial. This prevents the lock cylinder from spinning freely when unlocking, and ensures that the two lock cylinders do not affect each other and can be rotated normally to open. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0007] Figure 2 This is an exploded view of the overall structure of this utility model;
[0008] Figure 3 This is a cross-sectional view of the internal structure of the lock cylinder of this utility model.
[0009] In the diagram: 1 Lock body, 2 Inner lock cylinder, 201 Inner lock cylinder slot, 3 Dial wheel, 301 Dial wheel slot, 4 Outer lock cylinder, 401 Outer lock cylinder slot, 5 Inner dial wheel sleeve, 501 Inner buckle protrusion, 6 Outer dial wheel sleeve, 601 Outer buckle protrusion, 7 Central pivot, 8 Inner spring, 9 Middle spring, 10 Pivot sleeve, 11 Outer spring. Detailed Implementation
[0010] Example
[0011] like Figures 1 to 3 As shown, this utility model discloses a novel double-lock cylinder structure. An inner lock cylinder 2 and an outer lock cylinder 4 are rotatably mounted at both ends of a through hole in the middle of the lock body 1. A dial 3 is rotatably mounted between the inner lock cylinder 2 and the outer lock cylinder 4. The dial 3 is located at the middle slot of the lock body 1. An inner dial sleeve 5 is snapped onto the end of the inner lock cylinder 2. An inner snap-fit protrusion 501 is axially fixedly connected to the outer circumferential wall of the inner dial sleeve 5. The corresponding latch is in the inner lock cylinder slot 201 opened on the end side wall of the inner lock cylinder 2. The outer lock cylinder 4 end is latched with an outer dial sleeve 6. An outer latch protrusion 601 is fixedly connected axially on the outer circumferential wall of the outer dial sleeve 6. The outer latch protrusion 601 is correspondingly latched in the outer lock cylinder slot 401 opened on the end side wall of the outer lock cylinder 4. A dial slot 301 is opened on the inner side wall of the dial 3. The inner latch protrusion 501 and the... The outer buckle protrusions 601 are respectively inserted into the dial slots 301. A central rotating shaft 7 is passed through the middle of the inner dial sleeve 5. An inner spring 8 is passed through the central rotating shaft 7. One end of the inner spring 8 presses against the inner cavity end face of the inner dial sleeve 5, and the other end presses against the end of the central rotating shaft 7, so that the central rotating shaft 7 presses against the inner lock cylinder 2. A rotating shaft sleeve 10 is passed through the middle of the outer dial sleeve 6. An outer spring 11 is inserted through the upper part of the lock cylinder. One end of the outer spring 11 presses against the inner end face of the outer dial sleeve 6, and the other end presses against the end of the rotating shaft sleeve 10, so that the rotating shaft sleeve 10 presses against the outer lock cylinder 4. The central rotating shaft 7 is rotatably inserted into the rotating shaft sleeve 10. In the traditional lock cylinder, the inner dial sleeve 5 and the outer dial sleeve 6 are directly connected together and are not easy to separate. They are prone to mutual interference during the unlocking process, which can cause unlocking problems.
[0012] This technical solution incorporates a central spring 9 installed between the inner dial sleeve 5 and the outer dial sleeve 6. The inner spring 8, central spring 9, and outer spring 11 are all tower-shaped springs. One end of the central spring 9 presses against the end of the inner dial sleeve 5, and the other end presses against the end of the outer dial sleeve 6, thus pressing the inner dial sleeve 5 and outer dial sleeve 6 against the inner lock cylinder 2 and outer lock cylinder 4 respectively. The central spring 9 disengages the inner dial sleeve 5 and outer dial sleeve 6, ensuring that when one dial sleeve is inserted into the dial 3, the other dial sleeve can disengage from the dial 3. This allows the inner lock cylinder 2 and outer lock cylinder 4 to rotate independently without interfering with each other, preventing the lock cylinder from spinning freely or jamming during unlocking.
[0013] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.
[0015] Components not described in detail in this article are existing technologies.
[0016] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.
Claims
1. A novel double-lock cylinder structure, comprising a lock body (1), wherein an inner lock cylinder (2) and an outer lock cylinder (4) are rotatably mounted at both ends of a through hole in the middle of the lock body (1), a dial (3) is rotatably mounted between the inner lock cylinder (2) and the outer lock cylinder (4), the dial (3) is located at the middle slot of the lock body (1), an inner dial sleeve (5) is snapped onto the end of the inner lock cylinder (2), and an inner snap protrusion is axially fixedly connected to the outer circumferential wall of the inner dial sleeve (5). 501), the inner buckle protrusion (501) is correspondingly buckled in the inner lock cylinder slot (201) opened on the end side wall of the inner lock cylinder (2), the outer lock cylinder (4) end is buckled and installed with an outer dial sleeve (6), the outer dial sleeve (6) is axially fixedly connected with an outer buckle protrusion (601) on the outer circumferential wall of the outer dial sleeve (6), the outer buckle protrusion (601) is correspondingly buckled in the outer lock cylinder slot (401) opened on the end side wall of the outer lock cylinder (4), the inner side of the dial (3) A dial slot (301) is provided on the wall. The inner snap-fit protrusion (501) and the outer snap-fit protrusion (601) are respectively snapped into the dial slot (301). A central rotating shaft (7) is passed through the middle of the inner dial sleeve (5). An inner spring (8) is passed through the central rotating shaft (7). One end of the inner spring (8) presses against the inner cavity end face of the inner dial sleeve (5), and the other end presses against the end of the central rotating shaft (7), so that the central rotating shaft (7) presses against the inner cavity end face of the inner dial sleeve (5). On the inner lock cylinder (2), a rotating shaft sleeve (10) is inserted through the middle of the outer dial sleeve (6), and an outer spring (11) is inserted through the rotating shaft sleeve (10). One end of the outer spring (11) presses against the inner end face of the outer dial sleeve (6), and the other end presses against the end of the rotating shaft sleeve (10), so that the rotating shaft sleeve (10) presses against the outer lock cylinder (4). The central rotating shaft (7) is rotatably inserted into the rotating shaft sleeve (10). The feature is that: A central spring (9) is installed between the ends of the inner dial sleeve (5) and the outer dial sleeve (6). One end of the central spring (9) presses against the end of the inner dial sleeve (5), and the other end presses against the end of the outer dial sleeve (6), thereby pressing the inner dial sleeve (5) and the outer dial sleeve (6) against the inner lock cylinder (2) and the outer lock cylinder (4) respectively.
2. The novel double-opening lock cylinder structure according to claim 1, characterized in that: The inner spring (8), the middle spring (9), and the outer spring (11) are all tower-shaped springs.