A lock cylinder

Abstract

The application provides a fixed-bead lock cylinder, which has good anti-theft effect and is suitable for popularization and use due to the ingenious structure design and low complexity of the structure. The fixed-bead lock cylinder comprises a lock cylinder body, a rotatingly connected outer rotating lock cylinder in the lock cylinder body, a vertical through hole in the lock cylinder body, the through hole extending downward and penetrating the outer rotating lock cylinder, a plurality of unlocking beads with different lengths and matched with the outer rotating lock cylinder at positions corresponding to the outer rotating lock cylinder in the through hole, the unlocking beads being connected with the top of the through hole through a jacking mechanism, an inner lock cylinder mechanism rotatingly matched with the inner part of the outer rotating lock cylinder, and a key inserted into the inner lock cylinder mechanism, the key tooth type being matched with the unlocking beads with different lengths.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lock cylinder, in particular to a fixed bead lock cylinder. BACKGROUND

[0002] In the traditional lock industry, how to design and manufacture a simple and reliable lock to prevent technical unlocking has always been a difficult problem. With the rapid update of unlocking technology, ordinary pin tumbler locks are defined as A-level locks, which are almost not theftproof. The pin tumbler end is exposed and the working stroke is short, and the pin tumbler can be directly touched by foreign matter (steel wire hook, etc.), which is easy to be technically unlocked. And the higher level mechanical lock is difficult to be widely used due to its complex structure, high manufacturing cost and harsh use conditions. SUMMARY

[0003] In view of the problems that the existing pin tumbler lock has poor anti-theft ability and is easy to be technically unlocked, and the higher level mechanical lock has complex structure, high manufacturing cost and is difficult to be widely used in large quantities, the present application provides a fixed bead lock cylinder, which has good anti-theft effect and low structural complexity, and is suitable for popularization and use.

[0004] The technical scheme is as follows: a fixed bead lock cylinder, comprising a lock cylinder body, a rotatingly connected outer rotating lock cylinder is arranged in the lock cylinder body, characterized in that: a vertical through hole is arranged in the lock cylinder body, the through hole extends downward and penetrates the outer rotating lock cylinder, different length unlocking beads are arranged in the through hole corresponding to the position of the outer rotating lock cylinder, the unlocking beads are connected with the top of the through hole through a clamping mechanism, an inner lock cylinder mechanism is rotatingly arranged in the outer rotating lock cylinder, a key is inserted into the inner lock cylinder mechanism, the tooth shape of the key is matched with the unlocking beads of different heights.

[0005] When the key and the inner lock cylinder mechanism are 0° relative to the outer rotating lock cylinder, the outer cylindrical surface of the inner lock cylinder mechanism pushes the unlocking beads of different lengths out of the outer rotating lock cylinder, and the fixed bead lock cylinder is locked. When the key drives the inner lock cylinder mechanism to rotate 90° relative to the outer rotating lock cylinder, the unlocking beads of different lengths are lowered and embedded in the inner rotating lock cylinder under the action of the clamping mechanism, and are connected with the inner lock cylinder mechanism in linkage. The upper end surface of the unlocking beads of different lengths is tangent to the outer cylindrical surface of the outer rotating lock cylinder and the inner cylindrical surface of the lock cylinder body. At this time, the key drives the inner lock cylinder mechanism and the outer rotating lock cylinder to rotate 135°, and the fixed bead lock cylinder is opened.

[0006] It is further characterized in that: the inner lock core mechanism comprises an inner rotating lock core rotatably mounted in the interior of the outer rotating lock core, a sliding groove is arranged on the inner rotating lock core corresponding to the through hole, a fixed bead in sliding fit is arranged in the interior of the sliding groove, a clamping column hole perpendicular to the sliding groove is arranged on the inner rotating lock core, the clamping column in movable connection is arranged in the interior of the clamping column hole, a shallow groove in mutual fit with the end of the clamping column is arranged on the outer rotating lock core, a protruding part is arranged on the side wall of the fixed bead away from the clamping column, a connecting groove in mutual fit with the protruding part is arranged on the inner rotating lock core, and a first compression spring is arranged between the end of the protruding part close to the mouth of the inner rotating lock core and the connecting groove.

[0007] The jacking mechanism comprises an upper pressing bead slidably mounted in the interior of the through hole, and the upper pressing bead is connected with the top of the through hole through a second compression spring.

[0008] A limiting pin is inserted on the outer wall of the outer rotating lock core, and an arc-shaped moving groove in sliding fit with the limiting pin is arranged on the lock core body.

[0009] The fixed bead is provided with a socket groove for inserting the key away from the end of the mouth of the inner rotating lock core.

[0010] The inner rotating lock core is arranged eccentrically relative to the outer rotating lock core.

[0011] After the above structure is adopted, through the arrangement of the inner lock core mechanism, when 0°, the outer cylindrical surface of the inner lock core mechanism will push the unlocking beads with different lengths upward out of the outer rotating lock core, because the upper end surfaces of the unlocking beads with different lengths are not in the same plane, the outer rotating lock core and the lock core body cannot rotate relative to each other, the fixed bead lock is locked, when the key drives the inner lock core mechanism to rotate 90° relative to the outer rotating lock core, the unlocking beads with different lengths will be embedded in the interior of the outer rotating lock core under the action of the jacking mechanism and are connected with the inner lock core mechanism in linkage, the upper end surfaces of the unlocking beads with different lengths are tangent to the outer cylindrical surface of the outer rotating lock core and the inner cylindrical surface of the lock core body, at this time, the key drives the inner lock core mechanism and the outer rotating lock core to rotate, the fixed bead lock of the present application can be opened, through the ingenious structure design, the present application has good anti-theft effect, and the overall structure is not high in complexity, so it is suitable for large-scale popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a 0° state sectional view of the fixed bead lock of the present application;

[0013] Figure 2 It is a 90° state sectional view of the fixed bead lock of the present application;

[0014] Figure 3 It is a 135° state sectional view of the fixed bead lock of the present application;

[0015] Figure 4 These are cross-sectional views of the fixed-bead lock cylinder of the present invention from various angles during use;

[0016] Figure 5 This is a cross-sectional view of the fixed bead lock cylinder of the present invention in the 0° locked state from another direction;

[0017] Figure 6 This is a cross-sectional view of the fixed bead lock cylinder of the present invention in the 90° unlocked state from another direction. Detailed Implementation

[0018] like Figure 2 As shown, a fixed-bead lock cylinder includes a lock cylinder body 1, an outer rotating lock cylinder 2 rotatably connected inside the lock cylinder body 1, and a vertical through hole 3 inside the lock cylinder body 1. The through hole 3 extends downward and passes through the outer rotating lock cylinder 2. Inside the through hole 3, at a position corresponding to the outer rotating lock cylinder 2, there are mutually cooperating unlocking beads 4. The unlocking beads 4 are connected to the top wall of the through hole 3 through a tightening mechanism. The tightening mechanism provides opposing pressure to push the unlocking beads 4 downward. Specifically, the tightening mechanism includes an upper pressure bead 6 slidably installed inside the through hole 3. The upper pressure bead 6 is connected to the top wall of the through hole 3 through a second compression spring 7. The outer rotary lock cylinder 2 has an inner lock cylinder mechanism that rotates and engages with it. The key 5 is inserted into the inner lock cylinder mechanism. The key's tooth shape 5 corresponds to the unlocking beads 4 of different heights. Specifically, the inner lock cylinder mechanism includes an inner rotary lock cylinder 8 that is rotatably installed inside the outer rotary lock cylinder 2. The inner rotary lock cylinder 8 has a sliding groove 81 corresponding to the through hole 3. The sliding groove 81 has a fixed bead 9 that is slidably engaged inside it. The inner rotary lock cylinder 8 also has a locking pin hole that is perpendicular to the sliding groove 81. The locking pin hole has a locking pin 10 that is movably connected inside it. The bottom of the outer rotary lock cylinder 2 has a shallow groove 21 that engages with the end of the locking pin 10. The side wall of the fixed bead 9 has a protrusion 91 on the side away from the locking pin 10. The inner rotary lock cylinder 8 has a connecting groove that corresponds to the protrusion 91. A first compression spring 82 is provided between the end of the protrusion 91 near the opening of the inner rotary lock cylinder 8 and the connecting groove.

[0019] During operation, key 5 is inserted into the groove of the locking bead 9. When key 5 and the internal lock cylinder mechanism connected to it rotate relative to the external lock cylinder 2 to 0°, as... Figure 1 , 5 As shown, at this time, the locking pin 10 is inserted into the shallow groove 21 of the outer rotating lock cylinder 2 and connected. The locking pin is in a relaxed state, and the key 5 and the fixed bead 9 connected to it can move freely in the horizontal direction. Simultaneously, the inner lock cylinder mechanism pushes the unlocking bead 4 upwards out of the outer rotating lock cylinder 2. Because the upper surfaces of the unlocking beads 4 of different lengths are not on the same plane, the outer rotating lock cylinder 2 and the lock cylinder body 1 cannot rotate relative to each other. At this time, the fixed bead lock cylinder is in the initial locked state. When the key 5 drives the inner lock cylinder mechanism to rotate 90° relative to the outer rotating lock cylinder 2, as... Figure 2 , 6As shown, the sliding groove 81 of the inner lock cylinder mechanism corresponds to the through hole 3 of the lock cylinder body 1. Under the downward pressure of the upper pressing bead 6, the unlocking bead 4 moves downward and embeds into the outer rotating lock cylinder 2. The pressure-bearing pin 10 locks the fixing bead 9 onto the inner rotating lock cylinder 8. At this time, the inner rotating lock cylinder 8 is linked to the inner lock cylinder mechanism under the action of the unlocking bead 4. The upper surfaces of the multiple unlocking beads 4 are flush with the inner cylindrical surface of the outer lock cylinder body 2. At this time, the rotation... may Turning key 5 rotates the inner lock cylinder mechanism and the outer rotary lock cylinder 2 by 135°, which opens the fixed bead lock cylinder. The process of closing the fixed bead lock cylinder is as follows: Figure 4 As shown, a schematic diagram illustrates the process from locking to unlocking and then back to locking. This invention, through its ingenious structural design, provides excellent anti-theft performance while maintaining a low overall structural complexity, making it suitable for widespread adoption.

[0020] like Figure 1 As shown, the fixed bead 9 has a slot for inserting a key 5 at one end away from the opening of the inner rotating lock cylinder 8. After the key 5 is inserted, there is a certain gap between the fixed bead 9 and the inner wall of the outer rotating lock cylinder 2. At this time, the fixed bead 9 can move left and right. The fixed bead 9 can be moved left and right by either a key or a lock-picking tool. Since the fixed bead 9 is not in contact with the unlocking bead 4 at this time, this movement has no practical effect on opening the fixed bead lock cylinder of the present invention.

[0021] A limiting pin 11 is inserted into the outer wall of the outer rotating lock cylinder 2. The lock cylinder body 1 is provided with an arc-shaped moving groove that slides with the limiting pin 11. Under the action of the limiting pin 11 and the arc-shaped moving groove, the movement of the outer rotating lock cylinder 8 can be limited and guided.

[0022] The inner rotating lock cylinder 8 and the outer rotating lock cylinder 1 are not concentrically set. The inner rotating lock cylinder 8 is eccentrically set relative to the outer rotating lock cylinder 1, which makes the unlocking ball 4 have a larger radial movement dimension. As a result, the height difference of the teeth of the key 5 increases, so that the key 5 has a larger tooth height and enhances the anti-theft performance.

[0023] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fixed-bead lock cylinder, comprising a lock cylinder body, wherein an outer rotating lock cylinder is rotatably connected inside the lock cylinder body, characterized in that: The lock cylinder body has a vertical through hole inside, which extends downward and passes through the outer rotating lock cylinder. Inside the through hole, at the position corresponding to the outer rotating lock cylinder, there are unlocking beads of different lengths that cooperate with each other. The unlocking beads are connected to the top of the through hole through a tightening mechanism. The outer rotating lock cylinder has an inner lock cylinder mechanism that rotates and cooperates. The key is inserted into the inner lock cylinder mechanism. The key's teeth are matched with the unlocking beads of different lengths. When the key and the inner lock cylinder mechanism are at 0° relative to the outer rotating lock cylinder, the outer cylindrical surface of the inner lock cylinder mechanism pushes the unlocking beads of different lengths upward out of the outer rotating lock cylinder, locking the fixed bead lock cylinder. When the key drives the inner lock cylinder mechanism to rotate 90° relative to the outer rotating lock cylinder, the unlocking beads of different lengths move downward and embed into the outer rotating lock cylinder under the action of the tightening mechanism, and are linked with the inner lock cylinder mechanism. At this time, the key drives the inner lock cylinder mechanism and the outer rotating lock cylinder to rotate 135°, and the fixed bead lock cylinder opens. The inner lock cylinder mechanism includes an inner rotating lock cylinder rotatably mounted inside the outer rotating lock cylinder. The inner rotating lock cylinder has a sliding groove corresponding to the through hole, and a fixed bead that slides inside the sliding groove. The inner rotating lock cylinder has a locking pin hole perpendicular to the sliding groove, and a locking pin that is movably connected inside the locking pin hole. The outer rotating lock cylinder has a shallow groove that cooperates with the end of the locking pin. The side wall of the fixed bead has a protrusion on the side away from the locking pin. The inner rotating lock cylinder has a connecting groove that cooperates with the protrusion. A first compression spring is provided between the end of the protrusion near the opening of the inner rotating lock cylinder and the connecting groove.

2. The fixed-bead lock cylinder according to claim 1, characterized in that: The clamping mechanism includes an upper pressure bead slidably installed inside the through hole, and the upper pressure bead is connected to the top of the through hole via a second compression spring.

3. A fixed-bead lock cylinder according to claim 1, characterized in that: A limiting pin is inserted into the outer wall of the external rotating lock cylinder, and an arc-shaped moving groove is provided on the lock cylinder body to slide with the limiting pin.

4. A fixed-bead lock cylinder according to claim 1, characterized in that: The fixed bead has a slot for inserting the key at one end away from the opening of the inner rotating lock cylinder.

5. A fixed-bead lock cylinder according to claim 1, characterized in that: The inner rotary lock cylinder is offset relative to the outer rotary lock cylinder.

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