Double-layer position control lock

Abstract

The application provides a double-layer position control lock, which comprises a lock body, a lock cylinder arranged in the lock body and rotating relative to the lock body, a locking piece arranged on the lock cylinder and moving relative to the lock body between a locking position and an unlocking position, and a regulating mechanism for controlling the movement of the locking piece; the regulating mechanism comprises a plurality of regulating pieces arranged in the lock cylinder in an axial direction and lifting in a first direction, a plurality of driven pieces arranged between the regulating pieces and the locking piece, and an unlocking slot formed on the side of the driven piece close to the locking piece; two adjacent regulating pieces drive the same driven piece to lift to adjust the position of the unlocking slot, so that each unlocking slot is combined to form a shape in which the locking piece can partially enter in a second direction perpendicular to the first direction, so as to allow the locking piece to move from the locking position to the unlocking position. The application solves the technical problem of low unlocking difficulty in the prior art by the regulating pieces and the driven pieces.

Description

Technical Field

[0001] This invention relates to the field of lock cylinder technology, and in particular to a double-layer control lock. Background Technology

[0002] Traditional locks, especially side-pin locks based on a single pin mechanism, rely on a simple correspondence between the pin and the control groove of the side pin. That is, the pin is pushed to a specific position by a precisely cut groove on the key, allowing the side pin to fall into the groove in the lock cylinder under the pressure of the spring, thereby opening the lock.

[0003] However, the unlocking mechanism of existing side-pin locks is relatively simple. Skilled lock pickers may use tools such as probes to move the pins one by one, and by moving each pin, they can detect the position of the side-pin control slot and quickly find the correct unlocking combination, making it easy to pick the lock.

[0004] In view of this, it is necessary to improve the existing side-pin lock cylinder to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to disclose a double-layer control lock to solve many defects of the side-pin lock cylinder in the prior art, especially to solve the technical problem of easy unlocking.

[0006] To achieve the above objectives, the present invention provides a double-layer control lock, comprising: a lock body, a lock cylinder disposed within the lock body and rotating relative to the lock body, a locking member disposed in the lock cylinder and moving relative to the lock body between a locked position and an unlocked position, and a control mechanism for controlling the movement of the locking member;

[0007] The control mechanism includes: a plurality of control buttons arranged axially within the lock cylinder and moving up and down in a first direction; a plurality of driven members disposed between the control buttons and the locking member; and an unlocking groove is formed on the side of the driven members closest to the locking member.

[0008] Two adjacent adjustment controls drive the same driven member by lifting to adjust the position of the unlocking slot, such that the unlocking slots combine to form a shape in which the locking member can partially engage along a second direction perpendicular to the first direction, thereby allowing the locking member to move from the locked position to the unlocked position.

[0009] As a further improvement of the present invention, the control mechanism further includes: an inner positioning pin and an outer positioning pin coaxially disposed on both sides of the control control along the second direction;

[0010] Two adjacent external positioning pins extend into the same driven member and are movably connected to the driven member. During the lifting and lowering of the adjustment control, the external positioning pins move synchronously to drive the driven member and adjust the position of the unlocking slot.

[0011] As a further improvement of the present invention, two outer locating pins extending into the same driven member form a straight line segment, which extends linearly during the process of the outer locating pins adjusting the position of the unlocking groove.

[0012] As a further improvement of the present invention, one of the outer positioning pins is configured as a rotating pin rotatably connected to the driven member, and the other outer positioning pin is configured as a transmission pin, wherein the driven member is constructed with a transmission groove for receiving the transmission pin.

[0013] The adjustment control of the transmission pin drives the transmission pin to move within the transmission groove during the lifting and lowering process, and the driven member rotates around the rotating pin to adjust the position of the unlocking groove.

[0014] As a further improvement of the present invention, the locking member is characterized in that, in the unlocked position, the locking member is separated from the groove contained in the lock body to allow the lock cylinder to rotate relative to the lock body, and in the locked position, the locking member engages with the groove to prevent the lock cylinder from rotating relative to the lock body.

[0015] As a further improvement of the present invention, the lock cylinder is provided with a first keyway along the axial direction for loading the locking member and guiding the locking member to move along the second direction. Both ends of the locking member extend outward along the axial direction to form abutment portions, which are disposed in the first keyway and abutted against a first cover plate between the lock body and the lock cylinder. A compression spring is sandwiched between the abutment portion and the first cover plate, and the compression spring generates an elastic force on the locking member to drive the locking member to move from the locked position to the unlocked position.

[0016] As a further improvement of the present invention, the control mechanism further includes: a reset spring disposed at both ends of the control control along the first direction; the reset spring exerts an elastic force on the control control so that the control control is held at the center position of the lock cylinder when in the locked position.

[0017] As a further improvement of the present invention, the lock cylinder has a second keyway formed to load the return spring and guide the adjustment control to move up and down, and a second cover plate formed in the second keyway is disposed between the lock body and the lock cylinder, and the return spring is held against the second cover plate and the adjustment control.

[0018] As a further improvement of the present invention, the control panel includes a control plate and guide shafts disposed at both ends of the control plate and formed inside the return spring; the lock cylinder is configured with a partition formed between adjacent return springs and in the second keyway.

[0019] As a further improvement of the present invention, the control mechanism and the locking member are arranged symmetrically along the axial direction in two sets within the lock cylinder, and the two sets of control mechanisms respectively control the movement of the corresponding locking member.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the double-layer control lock drives the same driven member by raising and lowering two adjacent adjustment controls to control the position of the unlocking slot, so that each unlocking slot can be combined to form a shape in which the locking member partially engages along the second direction, so as to realize that the locking member moves from the locked position to the unlocked position. The position of one driven member is controlled by the cooperative action of the two adjustment controls. Even if the lock picker can observe or detect the state of some adjustment controls, he cannot directly deduce the correct position of other adjustment controls or driven members. This increases the amount of calculation and time required to crack the double-layer control lock, effectively reduces the possibility of technical unlocking, and increases the difficulty of cracking the double-layer control lock. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the lock body and lock cylinder of the double-layer control lock disclosed in this invention, wherein the locking element is in the locked position;

[0022] Figure 2 This is a cross-sectional view of the lock body and lock cylinder, with the locking element in the unlocked position;

[0023] Figure 3 A schematic diagram showing how the various unlocking slots are combined to form a shape into which the locking element partially engages along the second direction, wherein the locking element is in the unlocked position;

[0024] Figure 4 This is a schematic diagram showing the locking element, the first cover plate, and the compression spring in a disassembled state, wherein each unlocking groove is combined to form a shape in which the locking element partially engages along the second direction;

[0025] Figure 5 This is a schematic diagram showing that the unlocking slots are not assembled to form a shape in which the locking member partially engages along the second direction, wherein the locking member is in the locked position;

[0026] Figure 6 A schematic diagram showing how the various unlocking slots are combined to form a shape into which the locking element partially engages along the second direction;

[0027] Figure 7 A schematic diagram showing that the unlocking slots are not assembled to form a shape in which the locking element partially engages along the second direction;

[0028] Figure 8 When Figure 6 the unlocking slots in form a shape for the locking member to partially engage along the second direction, a schematic diagram of the positions of the inner positioning pins;

[0029] Figure 9 When the unlocking slots do not form a shape for the locking member to partially engage along the second direction, a schematic diagram of the positions of the inner positioning pins;

[0030] Figure 10 A perspective view of the lock body;

[0031] Figure 11 Along Figure 2 A cross-sectional view of the lock body and the lock core cut along the A-A direction in;

[0032] Figure 12 A cross-sectional view of the double-layer position control lock in another embodiment disclosed by the present invention. Detailed implementation manners

[0033] The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0034] In particular, it should be noted that in the following embodiments, the term "axial direction" refers to Figure 4 the direction shown by the X-axis in, that is, the longitudinal axis direction of the lock body 10. The term "first direction" refers to Figure 1 the direction shown by the Z-axis in. The term "second direction" refers to Figure 1 the direction shown by the Y-axis in, and the Y-axis is perpendicular to the Z-axis.

[0035] Please refer to Figures 1 to 12 a specific implementation manner of a double-layer position control lock 100 disclosed.

[0036] Refer to Figures 1 to 6 And Figure 10 As shown, in this embodiment, the double-layer position control lock 100 includes: a lock body 10, a lock core 20 disposed inside the lock body 10 and rotatable relative to the lock body 10, a locking member 30 disposed on the lock core 20 and movable relative to the lock body 10 between a locking position and an unlocking position, and a control mechanism 40 for controlling the movement of the locking member 30; the lock core 20 is axially disposed inside a through hole 12 of the lock body 10. When a paired key (not shown) is inserted into the lock core 20, the control mechanism 40 can control the locking member 30 to move from the locking position to the unlocking position, and then by rotating the key, the lock core 20 can be axially rotated relative to the lock body 10 to achieve unlocking.

[0037] The regulating mechanism 40 includes: a plurality of regulating members 41 arranged axially within the lock core 20 and ascending and descending in a first direction, a plurality of follower members 42 disposed between the regulating members 41 and the locking member 30, and an unlocking groove 421 is formed on one side of the follower member 42 close to the locking member 30; two adjacent regulating members 41 drive the same follower member 42 through ascending and descending to adjust the position of the unlocking groove 421, so that the unlocking grooves 421 are combined to form a shape for the locking member 30 to partially engage in a second direction perpendicular to the first direction, allowing the locking member 30 to move from the locked position to the unlocked position. Two adjacent regulating members 41 form a group and drive one follower member 42, and the regulating members 41 can ascend and descend in the first direction. By inserting a paired key (not shown) into the lock core 20, the regulating members 41 are guided to ascend and descend by the key, so that two adjacent regulating members 41 drive the same follower member 42 during the ascending and descending process, thereby controlling the position of the follower member 42 and realizing the adjustment of the position of the unlocking groove 421 on the follower member 42, so that during the ascending and descending drive of the regulating members 41, the unlocking grooves 421 on each follower member 42 can be combined to form a shape for the locking member 30 to partially engage in the second direction, thus releasing the restriction that the locking member 30 is held in the locked position by the follower member 42, enabling the locking member 30 to partially engage in each unlocking groove 421 in the second direction (such as Figure 2 the direction shown by the arrow Y2 in Figure 1 and Figure 5 ), moving from the locked position to the unlocked position for subsequent unlocking. The locked position of the locking member 30 is as shown in Figure 2 and Figure 3 . The unlocked position of the locking member 30 is as shown in

[0038] Compared with the side post lock in the prior art, the double-layer position control lock 100 drives the same follower member 42 through the ascending and descending of two adjacent regulating members 41 to control the position of the unlocking groove 421, so that the unlocking grooves 421 can be combined to form a shape for the locking member 30 to partially engage in the second direction, realizing the movement of the locking member 30 from the locked position to the unlocked position. The unlocking mechanism of the side post lock in the prior art is relatively simple. A skilled lock picker may use tools such as a probe to individually toggle the marbles and detect the position of the side post control groove by toggling each marble, thereby quickly finding the correct unlocking combination. However, for the double-layer position control lock 100, two regulating members 41 need to be toggled, and the position of one follower member 42 is controlled through the coordinated action of the two regulating members 41. Even if the lock picker can observe or detect the state of some regulating members 41, they cannot directly infer the correct positions of other regulating members 41 or follower members 42, thus increasing the computational amount and time for cracking the double-layer position control lock 100, effectively reducing the possibility of technical lock picking, and increasing the cracking difficulty of the double-layer position control lock 100.

[0039] Refer Figure 1 to Figure 2and Figure 10 As shown, a groove 11 is formed axially on the inner wall of the lock body 10 for engaging the locking member 30. In the locked position, the locking member 30 engages with the groove 11 to prevent the lock cylinder 20 from rotating relative to the lock body 10; as Figure 1 , Figure 5 and Figure 7 As shown, the unlocking slots 421 are not assembled to allow the locking member 30 to move along the second direction (e.g., Figure 2 The locking member 30 (in the direction indicated by arrow Y2) is partially engaged, with the driven member 42 abutting against the locking member 30 and engaging the locking member 30 with the groove 11 to prevent the lock cylinder 20 from rotating relative to the lock body 10. In the unlocked position, the locking member 30 disengages from the groove 11 contained in the lock body 10 to allow the lock cylinder 20 to rotate relative to the lock body 10; see reference Figure 2 and Figure 3 As shown, the unlocking slots 421 are combined to form the following... Figure 6 The locking element 30 shown can move along the second direction (e.g., Figure 2 The locking member 30 is partially engaged in the shape indicated by the arrow Y2, and is partially engaged in each unlocking groove 421. The locking member 30 is separated from the groove 11 to allow the lock cylinder 20 to rotate relative to the lock body 10.

[0040] Specifically, refer to Figure 1 and Figure 2 and Figure 8 As shown, the lock cylinder 20 is configured with a keyhole 50 extending axially. The regulating mechanism 40 further includes an inner positioning pin 43 and an outer positioning pin 44 coaxially arranged on both sides of the regulating control 41 along a second direction. Two adjacent outer positioning pins 44 extend into the same driven member 42 and are movably connected to the driven member 42. During the lifting and lowering process of the regulating control 41, the outer positioning pins 44 move synchronously to drive the driven member 42 and adjust the position of the unlocking groove 421. The inner positioning pin 43 extends into the keyhole 50 along the second direction. During the insertion of the paired key (not shown) into the keyhole 50, the positioning groove (not shown) on the key surface pushes the inner positioning pin 43 to move upward or downward in the first direction, thereby driving the adjustment control 41 to rise and fall. The adjustment control 41 drives the outer positioning pin 44 to move synchronously, so as to precisely control the movement position of the adjustment control 41 in the first direction, forming the first control for unlocking the double-layer control lock 100. Then, the two adjacent outer positioning pins 44 drive the corresponding parts of the driven member 42 to control the position of the driven member 42, thereby adjusting the position of the unlocking groove 421. Through the synergistic effect of the two adjacent outer positioning pins 44, the second control for unlocking the double-layer control lock 100 is formed, which increases the difficulty of cracking the double-layer control lock 100.

[0041] Specifically, refer to Figure 1 and Figure 2 and Figure 6 and Figure 7As shown, one external positioning pin 44 is configured as a rotating pin 441 rotatably connected to the follower 42, and the other external positioning pin 44 is configured as a transmission pin 442. The follower 42 is formed with a transmission groove 422 for accommodating the transmission pin 442. The regulating member 41 configured with the transmission pin 442 drives the transmission pin 442 to move within the transmission groove 422 during the lifting and lowering process, and the follower 42 rotates around the rotating pin 441 to adjust the position of the unlocking groove 421. During the lifting and lowering process of the regulating member 41 configured with the rotating pin 441, the rotating pin 441 will drive the corresponding part of the follower 42 to lift and lower synchronously. At the same time, during the lifting and lowering process of the regulating member 41 configured with the transmission pin 442, it will drive the transmission pin 442 to move within the transmission groove 422 and drive the corresponding part of the follower 42 to lift and lower synchronously, so that the follower 42 rotates around the rotating pin 441 to control the position of the follower 42, thereby adjusting the position of the unlocking groove 421, so that each unlocking groove 421 is combined to form as Figure 6 the shape shown in which the locking member 30 can be partially inserted along the second direction.

[0042] Refer Figure 6 to Figure 8 and Figure 9 As shown, the axes of two adjacent external positioning pins 44 extending into the same follower 42 form a straight line segment (not shown), and the straight line segment linearly extends during the process of the external positioning pin 44 adjusting the position of the unlocking groove 421; in the locking state as shown in Figure 9 , the axes of each internal positioning pin 43 are on the same straight line. When inserting the paired key, since the two adjacent external positioning pins 44 are movably connected to the follower 42, the two external positioning pins 44 will lift and lower along the first direction, and at the same time linearly extend the straight line segment. The two external positioning pins 44 respectively drive the corresponding parts of the follower 42 to adjust the position of the unlocking groove 421 until each unlocking groove 421 can be combined to form the shape in which the locking member 30 can be partially inserted along the second direction.

[0043] Refer Figures 1 to 5 As shown, the lock core 20 is axially provided with a first keyway 21 for loading the locking member 30 and guiding the locking member 30 to move along the second direction. Both ends of the locking member 30 extend outward axially to form abutting portions 31. A first cover plate 45 is disposed in the first keyway 21 and abutted between the lock body 10 and the lock core 20. A compression spring 46 is clamped between the abutting portion 31 and the first cover plate 45. An elastic force is formed on the locking member 30 through the compression spring 46 to drive the locking member 30 to move from the locking position to the unlocking position. In the locking position, the follower 42 abuts against the locking member 30, and the compression spring 46 is compressed by the first cover plate 45 and the abutting portion 31 and is in a compressed state; in the unlocking position, each unlocking groove 421 is combined to form as Figure 6The shape shown in which the locking member 30 can be partially inserted along the second direction, the compression spring 46 releases elastic potential energy and forms an elastic force on the locking member 30 to drive the locking member 30 to move along the second direction (e.g., Figure 2 the direction shown by the arrow Y2 in

[0044] Refer Figures 1 to 9 as shown, the regulating mechanism 40 further includes: return springs 47 arranged at both ends of the regulating member 41 along the first direction; the return springs 47 form an elastic force on the regulating member 41 so that when in the locked position, the regulating member 41 is held at the central position of the lock core 20. During the process of inserting the key, the inner positioning pin 43 is pushed to move upward or downward along the first direction through a positioning groove (not shown) formed on the surface of the key, so as to drive the regulating member 41 to rise and fall, thereby stretching or compressing the return springs 47 at both ends of the regulating member 41 respectively; when the key is pulled out, the return springs 47 at both ends of the regulating member 41 release elastic potential energy to drive the regulating member 41 to move along the first direction, so as to automatically reset the regulating member 41 to the central position of the lock core 20 and release the shape formed by the combination of the unlocking grooves 421 in which the locking member 30 can be partially inserted along the second direction, so that the driven member 42 can push the locking member 30 along Figure 1 the direction shown by the arrow Y1 in

[0045] Refer Figure 1 to Figure 2 as shown, the lock core 20 is provided with a second key groove 22 for loading the return spring 47 and guiding the up and down movement of the regulating member 41, a second cover plate 48 is arranged between the lock body 10 and the lock core 20 and is formed in the second key groove 22, and the return spring 47 is abutted between the second cover plate 48 and the regulating member 41. The second key groove 22 provides a guiding path for the regulating member 41 to move up and down along the first direction, so as to ensure that the regulating member 41 remains stable and accurately positioned during the rising and falling process, avoid deviation, and ensure the accuracy of the linkage between the regulating member 41 and the driven member 42. And through the second key groove 22, it is convenient to install and replace the regulating member 41 and the return spring 47, and the second cover plate 48 closes and protects the return spring 47 and other components inside the lock core 20, and is also convenient for assembly and later maintenance.

[0046] Refer Figure 1 to Figure 2 and Figure 11As shown, the regulating member 41 includes a regulating plate 411 and guide shafts 412 disposed at both ends of the regulating plate 411 and formed inside the return spring 47; the lock core 20 is configured to form a partition plate 23 between adjacent return springs 47 and formed in the second keyway 22. Inside the lock core 20, the guide shafts 412 ensure that the regulating member 41 rises or falls stably along the second keyway 22, avoiding deviation, and increasing the stability when the regulating member 41 moves, ensuring the consistency of the actions of each regulating member 41. The internal space of the lock core 20 is separated by the partition plate 23 to ensure the independent operation between different regulating members 41, avoiding interference between the regulating members 41 during movement.

[0047] As shown Figure 12 Exemplarily, in some embodiments, two sets of regulating mechanisms 40 and locking members 30 are symmetrically arranged along the axial direction inside the lock core 20, and the two sets of regulating mechanisms 40 respectively control the movement of the corresponding locking members 30. A keyhole 50 is formed between the regulating member 41 and the partition plate 23. A paired key is inserted into the keyhole 50, and the inner positioning pins 43 on both sides are respectively pushed to move upward or downward in the first direction through the positioning grooves (not shown) formed on both surfaces of the key, so as to drive the regulating member 41 to rise and fall. The regulating member 41 drives the outer positioning pins 44 to move synchronously to accurately control the moving position of the regulating member 41 in the first direction. Then, the corresponding parts of the follower 42 are respectively driven by two adjacent outer positioning pins 44 along the axial direction to control the position of the follower 42, and further adjust the positions of the unlocking grooves 421 on both sides, so that the shapes formed by the unlocking grooves 421 on both sides can partially engage the corresponding locking members 30 in the second direction, enabling the locking members 30 to partially engage into the unlocking grooves 421 in the second direction, and realizing the movement of the locking members 30 from the locked position to the unlocked position.

[0048] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation manners or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

[0049] [[ID=ll]]For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-layer control lock, characterized in that, include: The lock body includes a lock cylinder disposed within the lock body and rotating relative to the lock body, a locking member disposed within the lock cylinder and moving relative to the lock body between a locked position and an unlocked position, and a control mechanism for controlling the movement of the locking member. The control mechanism includes: a plurality of control buttons arranged axially within the lock cylinder and moving up and down in a first direction; a plurality of driven members disposed between the control buttons and the locking member; and an unlocking groove is formed on the side of the driven members closest to the locking member. Two adjacent adjustment controls drive the same driven member by lifting to adjust the position of the unlocking slot, such that the unlocking slots combine to form a shape in which the locking member can partially engage along a second direction perpendicular to the first direction, thereby allowing the locking member to move from the locked position to the unlocked position; The control mechanism further includes: an inner positioning pin and an outer positioning pin coaxially arranged on both sides of the control control along the second direction; Two adjacent external positioning pins extend into the same driven member and are movably connected to the driven member. During the lifting and lowering of the adjustment control, the external positioning pins move synchronously to drive the driven member and adjust the position of the unlocking slot.

2. The double-layer control lock according to claim 1, characterized in that, Two outer locating pins extending into the same driven member form a straight line segment, which extends linearly during the process of adjusting the position of the unlocking slot by the outer locating pins.

3. The double-layer control lock according to claim 1, characterized in that, One of the outer positioning pins is configured as a rotating pin rotatably connected to the driven member, and the other outer positioning pin is configured as a transmission pin, wherein the driven member is constructed with a transmission groove to accommodate the transmission pin. The adjustment control of the transmission pin drives the transmission pin to move within the transmission groove during the lifting and lowering process, and the driven member rotates around the rotating pin to adjust the position of the unlocking groove.

4. The double-layer control lock according to any one of claims 1 to 3, characterized in that, In the unlocked position, the locking member is disengaged within a groove in the lock body to allow the lock cylinder to rotate relative to the lock body; in the locked position, the locking member engages with the groove to prevent the lock cylinder from rotating relative to the lock body.

5. The double-layer control lock according to claim 4, characterized in that, The lock cylinder has a first keyway formed along its axial direction for loading the locking member and guiding the locking member to move along the second direction. Both ends of the locking member extend outward along its axial direction to form abutment portions, which are disposed in the first keyway and abutted against a first cover plate between the lock body and the lock cylinder. A compression spring is clamped between the abutment portion and the first cover plate, and the compression spring exerts an elastic force on the locking member to drive the locking member to move from the locked position to the unlocked position.

6. The double-layer control lock according to claim 4, characterized in that, The control mechanism further includes: a return spring disposed at both ends of the control control along the first direction; the return spring exerts an elastic force on the control control so that the control control is held at the center position of the lock cylinder when in the locked position.

7. The double-layer control lock according to claim 6, characterized in that, The lock cylinder has a second keyway that loads the return spring and guides the adjustment control to move up and down. A second cover plate formed in the second keyway is disposed between the lock body and the lock cylinder. The return spring is held against the second cover plate and the adjustment control.

8. The double-layer control lock according to claim 7, characterized in that, The control panel includes a control plate and guide shafts disposed at both ends of the control plate and formed inside the return spring; the lock cylinder is configured with a partition formed between adjacent return springs and in the second keyway.

9. The double-layer control lock according to claim 1, characterized in that, The control mechanism and the locking element are arranged symmetrically along the axial direction within the lock cylinder in two sets, and the two sets of control mechanisms respectively control the movement of the corresponding locking element.

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