Double-opening lock

Abstract

Unlocking of a first lock cylinder triggers connection of a first transmission sleeve and a dial wheel assembly, so that the first lock cylinder drives the dial wheel assembly to rotate through the first transmission sleeve, and a linkage rod responds to the connection action of the first transmission sleeve and the dial wheel assembly to move towards a second lock cylinder and drives a second transmission sleeve to be separated from the dial wheel assembly; unlocking of the second lock cylinder triggers joint of the second transmission sleeve and the shifting wheel assembly, the second lock cylinder drives the shifting wheel assembly to rotate through the second transmission sleeve, and the linkage rod responds to joint action of the second transmission sleeve and the shifting wheel assembly to move towards the first lock cylinder and drive the first transmission sleeve to be separated from the shifting wheel assembly. The effects that the structure is simple, and the anti-theft function is optimized are achieved.

Description

Technical Field

[0001] The present invention relates to a lock, in particular to a double-opening lock. Background Art

[0002] In the early days, door locks generally adopted the opening method of "external key + internal knob", that is, unlocking was performed through the key outdoors, and the door could be quickly opened through the internal knob indoors. However, this design has obvious defects: when the internal knob is damaged or the anti-lock mechanism is stuck, indoor personnel may not be able to open the door. At the same time, criminals can use tools such as hook needles to operate the internal knob through the door gap, posing a certain safety hazard.

[0003] To solve the above problems, double-opening key locks have emerged on the market. Such locks achieve the function of unlocking with keys both inside and outside by setting two sets of independent lock cores inside the lock body. For example, the "double-opening pin tumbler lock" mentioned in the prior art publication number CN102587727A sets a symmetric lock core structure on the left and right inside the lock shell, and the keys on both sides can be independently operated without interference. However, although this symmetric design realizes the function of two-way unlocking, it still has deficiencies: 1. The two sets of independent lock core structures are cumbersome, increasing the manufacturing cost; 2. The internal unlocking structure of the pin tumbler lock is relatively simple, and thieves only need to use tools such as hook needles to align the pins and then rotate the lock core to unlock, and the anti-theft function is weak. It can be seen that although the above double-opening pin tumbler lock solves the deficiencies in the previous locks, there is still a large room for improvement. Summary of the Invention

[0004] The object to be achieved by the present invention is to provide a double-opening lock, which solves at least one of the above problems and achieves the effects of simple structure and optimized anti-theft function.

[0005] To achieve the above object, the present invention adopts the following technical solution: A double-lock includes a first lock body, a second lock body, and a dial wheel assembly located between the two. The first lock body includes a first lock core that can rotate after being unlocked, and the second lock body includes a second lock core that can rotate after being unlocked. The double-lock further includes a transmission structure located between the first lock body and the second lock body. The transmission structure includes: a first transmission sleeve arranged between the first lock core and the dial wheel assembly, which engages or disengages from the dial wheel assembly through axial displacement; a second transmission sleeve arranged between the second lock core and the dial wheel assembly, which engages or disengages from the dial wheel assembly through axial displacement; a linkage rod that axially penetrates through the dial wheel assembly and can move bidirectionally along the axis. The unlocking of the first lock core triggers the engagement of the first transmission sleeve with the dial wheel assembly, causing the first lock core to drive the dial wheel assembly to rotate through the first transmission sleeve. The linkage rod moves towards the second lock core in response to the engagement action of the first transmission sleeve and the dial wheel assembly, driving the second transmission sleeve to disengage from the dial wheel assembly; the unlocking of the second lock core triggers the engagement of the second transmission sleeve with the dial wheel assembly, causing the second lock core to drive the dial wheel assembly to rotate through the second transmission sleeve. The linkage rod moves towards the first lock core in response to the engagement action of the second transmission sleeve and the dial wheel assembly, driving the first transmission sleeve to disengage from the dial wheel assembly.

[0006] After adopting the above technical solution, the present invention has the following advantages: There is a transmission structure between the first lock body and the second lock body. The transmission structure includes: a first transmission sleeve, a second transmission sleeve, and a linkage rod. The linkage rod axially penetrates through the dial wheel assembly and moves bidirectionally along the axis to respond to the actions of the first transmission sleeve and the second transmission sleeve.

[0007] The unlocking of the first lock body can be achieved by rotating the first lock core. The first transmission sleeve is arranged between the first lock core and the dial wheel assembly. When the first lock body is in the unlocked state, the engagement of the first transmission sleeve with the dial wheel assembly is triggered. After the linkage rod responds to the engagement action of the first transmission sleeve and the dial wheel assembly, it moves towards the second lock core. At this time, the linkage rod drives the second transmission sleeve to disengage from the dial wheel assembly. Then, the first lock core rotates and drives the dial wheel assembly to rotate through the first transmission sleeve, realizing the unlocking of the first lock body. At this time, since the second transmission sleeve is disengaged from the dial wheel assembly, the second lock body cannot be unlocked;

[0008] The unlocking of the second lock body can be achieved by rotating the second lock core. The second transmission sleeve is arranged between the second lock core and the dial wheel assembly. When the second lock body is in the unlocked state, the engagement of the second transmission sleeve with the dial wheel assembly is triggered. After the linkage rod responds to the engagement action of the second transmission sleeve and the dial wheel assembly, it moves towards the first lock core. At this time, the linkage rod drives the first transmission sleeve to disengage from the dial wheel assembly. Then, the second lock core rotates and drives the dial wheel assembly to rotate through the second transmission sleeve, realizing the unlocking of the second lock body. At this time, since the first transmission sleeve is disengaged from the dial wheel assembly, the first lock body cannot be unlocked.

[0009] As can be seen from the above, it has the following advantages:

[0010] 1. The first lock body and the second lock body are linked and coordinated through a linkage rod. Compared with the independent unlocking structure of two independent lock cores, by sharing the dial assembly and the linkage rod, the number of parts is reduced while maintaining the double-opening function, making the internal structure of the double-opening lock more concise and compact, and reducing the production cost.

[0011] 2. The two-way movement of the linkage rod responds to the actions of the first drive sleeve and the second drive sleeve, enabling the entire double-opening lock to form a forced mechanical interlock. When the lock core on either side is in the unlocked state, the linkage rod physically blocks the unlocking transmission path on the other side, ensuring that the first lock core and the second lock core cannot be unlocked simultaneously. This dynamic linkage has higher security compared to the structure of two independent double-opening locks that can be unlocked simultaneously.

[0012] 3. The engagement between the first drive sleeve or the second drive sleeve and the dial assembly must be established through the operation of a regular key. From the above description of the unlocking action, it can be seen that ordinary technical unlocking tools such as pick needles cannot replace the regular key to trigger the engagement or disengagement between the first drive sleeve or the second drive sleeve and the linkage rod, nor can they drive the dial assembly to rotate through the first drive sleeve or the second drive sleeve to unlock. Therefore, it effectively resists common technical unlocking means, improves the security of the double-opening lock, and makes it more reliable.

[0013] Furthermore, the engagement between the first drive sleeve and the dial assembly constitutes a plug-in connection that restricts their relative rotation and allows their relative axial movement.

[0014] Furthermore, one of the first drive sleeve and the dial assembly has an eccentrically arranged first drive pin, and the other has an eccentrically arranged first drive groove. The first drive pin and the first drive groove are inserted or separated from each other as the first drive sleeve axially displaces; or, one of the first drive sleeve and the dial assembly has a coaxial first drive post, and the other has a coaxial first drive hole. The first drive post and the first drive hole constitute a plug-in connection that restricts their relative rotation and allows their relative axial movement.

[0015] Furthermore, the engagement between the second drive sleeve and the dial assembly constitutes a plug-in connection that restricts their relative rotation and allows their relative axial movement.

[0016] Furthermore, one of the second drive sleeve and the dial assembly has an eccentrically arranged second drive pin, and the other has an eccentrically arranged second drive groove. The second drive pin and the second drive groove are inserted or separated from each other as the second drive sleeve axially displaces; or, one of the second drive sleeve and the dial assembly has a coaxial second drive post, and the other has a coaxial second drive hole. The second drive post and the second drive hole constitute a plug-in connection that restricts their relative rotation and allows their relative axial movement.

[0017] Adopting the foregoing technical solution, generally speaking, the engagement of the first drive sleeve, the second drive sleeve and the dial wheel assembly all form a plug-in structure that restricts their relative rotation and allows their relative axial movement. This plug-in structure locks the relative rotation between the first drive sleeve, the second drive sleeve and the dial wheel assembly through a physical limit structure. This rigid connection avoids slippage or misalignment of the torque during transmission.

[0018] Furthermore, a pre-tightened first drive spring is provided between the first drive sleeve and the first lock core to maintain the engagement tendency between the first drive sleeve and the dial wheel assembly; a pre-tightened second drive spring is provided between the second drive sleeve and the second lock core to maintain the engagement tendency between the second drive sleeve and the dial wheel assembly.

[0019] Furthermore, an explosion-proof pin is provided on the dial wheel assembly, a first explosion-proof groove is provided on the linkage rod, and a pre-tightened first explosion-proof spring is provided between the end of the linkage rod close to the first drive sleeve and the first drive sleeve. When the second lock core is removed, the first drive spring pushes the first drive sleeve to engage the dial wheel assembly, and the first explosion-proof spring pushes the linkage rod to displace towards the second lock core, so that the explosion-proof pin is inserted into the first explosion-proof groove to axially lock the linkage rod; and / or, a second explosion-proof groove is provided on the linkage rod, and a pre-tightened second explosion-proof spring is provided between the end of the linkage rod close to the second drive sleeve and the second drive sleeve. When the first lock core is removed, the second drive spring pushes the second drive sleeve to engage the dial wheel assembly, and the second explosion-proof spring pushes the linkage rod to displace towards the second lock core, so that the explosion-proof pin is inserted into the second explosion-proof groove to axially lock the linkage rod.

[0020] Adopting the foregoing technical solution, when the second lock core is removed, the first drive spring drives the first drive sleeve to move towards the second lock core to maintain the engagement with the dial wheel assembly. At the same time, the first explosion-proof spring drives the linkage rod to also move towards the second lock core until the explosion-proof pin is inserted into the first explosion-proof groove. This process achieves double locking:

[0021] 1. Axial locking: By inserting the explosion-proof pin into the first explosion-proof groove, the axial movement of the linkage rod is restricted;

[0022] 2. Circumferential locking: Since the linkage rod cannot move axially, the first drive sleeve cannot disengage from the dial wheel assembly to rotate the dial wheel assembly.

[0023] In summary, the plug-in connection between the first drive sleeve and the dial wheel assembly always restricts their rotation, so the dial wheel assembly cannot be rotated to unlock.

[0024] And / or, when the first lock core is removed, the second drive spring drives the second drive sleeve to move towards the first lock core to maintain the engagement with the dial wheel assembly. At the same time, the second explosion-proof spring drives the linkage rod to also move towards the first lock core until the explosion-proof pin is inserted into the second explosion-proof groove. This process achieves double locking:

[0025] 1. Axial locking: The axial movement of the linkage rod is restricted by the insertion of the anti-riot pin into the second anti-riot groove.

[0026] 2. Circumferential locking: Since the linkage rod cannot move axially, the second transmission sleeve cannot disengage from the dial wheel assembly to rotate the dial wheel assembly.

[0027] In summary, the insertion connection between the second transmission sleeve and the dial wheel assembly always restricts the rotation of both, so the dial wheel assembly cannot be rotated to unlock the lock.

[0028] This integrated mechanical structure protection method avoids forced unlocking. Although the structure is simple, it significantly improves the security of the lock and makes it more reliable to use.

[0029] Furthermore, the first anti-riot groove is an annular groove provided along the circumferential direction of the linkage rod; and / or, the second anti-riot groove is an annular groove provided along the circumferential direction of the linkage rod.

[0030] Adopting the foregoing technical solution, the circumferential continuity of the annular groove ensures that the linkage rod is at any angle in the circumferential direction, and the anti-riot pin can be inserted without deliberate alignment, avoiding anti-riot failure caused by insertion deviation; and / or, the circumferential continuity of the annular groove ensures that the linkage rod is at any angle in the circumferential direction, and the anti-riot pin can be inserted without deliberate alignment, avoiding anti-riot failure caused by insertion deviation.

[0031] Furthermore, the anti-riot pin is configured to be driven by its own gravity to insert into the first anti-riot groove or the second anti-riot groove; or, an elastic element is provided on the dial wheel assembly, and the elastic element biases the anti-riot pin towards the linkage rod.

[0032] Adopting the foregoing technical solution, the anti-riot pin is provided on the dial wheel assembly. Since the radial height of the dial wheel assembly is limited, in order to ensure that the length of the anti-riot pin is sufficient to be inserted into the first anti-riot groove and play an axial positioning role, the anti-riot pin can be set to fall into the first anti-riot groove or the second anti-riot groove by its own gravity; or, the method of biasing the anti-riot pin through an elastic element is adopted. This biasing through the elastic element can absorb part of the mechanical shock, reduce the wear between the anti-riot pin and the dial wheel assembly, and when the linkage rod moves to insert the anti-riot pin into the first anti-riot groove or the second anti-riot groove, the elastic pre-tightening force of the elastic element ensures stable contact between the anti-riot pin and the first anti-riot groove or the second anti-riot groove, maintaining the locked state.

[0033] Furthermore, the dial wheel assembly includes an inner dial wheel, and the inner dial wheel has at least one tapered end.

[0034] With the foregoing technical solution, when a brute-force unlocking tool (such as a wrench or a crowbar) clamps the outer peripheral surface of the inner dial wheel, the tapered end makes the contact surface of the brute-force unlocking tool change from a plane to an inclined plane. Therefore, when a force is applied by the brute-force unlocking tool, there will be a relative sliding tendency with the contact surface of the inner dial wheel, making it impossible for the brute-force unlocking tool to stably bite the surface of the inner dial wheel, thereby reducing the torque transmission ability and increasing the security of the double unlocking device.

[0035] Further, the double unlocking device includes a first lock case disposed outside the first lock core, a second lock case disposed outside the second lock core, and a dial lock case disposed outside the dial wheel assembly. The first lock case, the second lock case, and the dial lock case are integrally formed. The first lock case and the dial lock case are connected by a first reduced-diameter section; and / or, the second lock case and the dial lock case are connected by a second tapered section. The cross-sections of the first reduced-diameter section and the second tapered section are smaller than the cross-sections of the first lock case, the second lock case, and the dial lock case.

[0036] With the foregoing technical solution, the cross-section of the first reduced-diameter section is smaller than the cross-sections of the first lock case and the dial lock case. The first tapered section is used to reduce the cross-sectional area at the connection, reducing the connection strength between the first lock case and the dial wheel assembly. Therefore, when an external force acts on the first lock case, the first reduced-diameter section will break due to insufficient strength, separating the first lock case from the dial lock case, keeping the dial housing intact, and the dial wheel assembly still requires the correct key to rotate and unlock; and / or, the cross-section of the second reduced-diameter section is smaller than the cross-sections of the second lock case and the dial lock case. The second tapered section is used to reduce the cross-sectional area at the connection, reducing the connection strength between the second lock case and the dial wheel assembly. Therefore, when an external force acts on the second lock case, the second reduced-diameter section will break due to insufficient strength, separating the second lock case from the dial lock case, keeping the dial housing intact, and the dial wheel assembly still requires the correct key to rotate and unlock. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings:

[0038] Figure 1 Structural schematic of a double unlocking device of the present invention without a key inserted Figure 1 ;

[0039] Figure 2 Structural schematic of a double unlocking device of the present invention with a key inserted Figure 1 ;

[0040] Figure 3 Structural schematic of a double unlocking device of the present invention without a key inserted Figure 2 ;

[0041] Figure 4 Structural schematic of a double unlocking device of the present invention with a key inserted Figure 2 ;

[0042] Figure 5 Schematic diagram of the structure of a double-lock without a key inserted according to the present invention Figure 3 ;

[0043] Figure 6 Schematic diagram of the structure of a double-lock with a key inserted according to the present invention Figure 3 ;

[0044] Figure 7 Schematic diagram of the engagement of the first drive sleeve, the second drive sleeve and the connecting member without a key inserted according to the present invention;

[0045] Figure 8 Schematic diagram of the engagement of the first drive sleeve, the second drive sleeve and the connecting member with a key inserted according to the present invention;

[0046] Figure 9 Schematic cross-sectional view of the first drive sleeve, the second drive sleeve and the connecting member without a key inserted according to the present invention;

[0047] Figure 10 Schematic cross-sectional view of the first drive sleeve, the second drive sleeve and the connecting member with a key inserted according to the present invention;

[0048] Figure 11 Schematic diagram of the structure of an embodiment of the present invention without a key inserted Figure 1 ;

[0049] Figure 12 Schematic diagram of the structure of an embodiment of the present invention with a key inserted Figure 1 ;

[0050] Figure 13 Schematic diagram of the structure of an embodiment of the present invention without a key inserted Figure 2 ;

[0051] Figure 14 Schematic diagram of the structure of an embodiment of the present invention with a key inserted Figure 2 ;

[0052] Figure 15 Schematic diagram of the engagement of the first drive sleeve, the second drive sleeve and the connecting member without a key inserted in an embodiment of the present invention;

[0053] Figure 16 Schematic diagram of the engagement of the first drive sleeve, the second drive sleeve and the connecting member with a key inserted in an embodiment of the present invention;

[0054] Figure 17 Schematic cross-sectional view of the first drive sleeve, the second drive sleeve and the connecting member without a key inserted in an embodiment of the present invention;

[0055] Figure 18 Schematic cross-sectional view of the first drive sleeve, the second drive sleeve and the connecting member with a key inserted in an embodiment of the present invention;

[0056] Figure 19 Schematic cross-sectional view of the first drive sleeve and the connecting member of the present invention;

[0057] Figure 20 Schematic cross-sectional view of the first drive sleeve and the connecting member in an embodiment of the present invention

[0058] Figure 21 Schematic structural view of the explosion-proof mechanism of the first lock body in the present invention;

[0059] Figure 22 Schematic cross-sectional view of the explosion-proof mechanism of the first lock body in the present invention;

[0060] Figure 23 For the present invention Figure 1 Enlarged view of part A in;

[0061] Figure 24 Schematic structural view of the first lock housing, the second lock housing and the dial lock housing in the present invention. Detailed implementation manners

[0062] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention.

[0063] Terms such as "first", "second", etc. (if any) in the specification and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily imply the existence of "first". It should be understood that in the present invention, "including" and "having" and any of their variations are intended to cover non-exclusive inclusion. It should be understood that in the present invention, "a plurality" means two or more. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y may represent: X exists alone, X and Y exist simultaneously, and Y exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. "Including X, Y, and Z", "including X, Y, Z" means that all of X, Y, and Z are included, "including X, Y, or Z" means including any one of X, Y, and Z, and "including X, Y, and / or Z" means including any one or any two or all three of X, Y, and Z.

[0064] The technical solutions of the present invention will be described in detail below with specific embodiments. These several specific embodiments can be combined or replaced according to the actual situation. For the same or similar concepts or processes, they may not be repeated in some embodiments.

[0065] Such asFigures 1 to 10 As shown in the figure, the present invention provides a double-lock, which includes a first lock body 100, a second lock body 200 and a dial assembly 300 located therebetween. The first lock body 100 includes a first lock core 110 that can rotate after being unlocked. The second lock body 200 includes a second lock core 210 that can rotate after being unlocked. The double-lock further includes a transmission structure located between the first lock body 100 and the second lock body 200. The transmission structure includes: a first transmission sleeve 1 disposed between the first lock core 110 and the dial assembly 300, which engages or disengages from the dial assembly 300 through axial displacement; a second transmission sleeve 2 disposed between the second lock core 210 and the dial assembly 300, which engages or disengages from the dial assembly 300 through axial displacement; a linkage rod 3 that axially penetrates through the dial assembly 300 and can move bidirectionally along the axis. The unlocking of the first lock core 110 triggers the engagement of the first transmission sleeve 1 with the dial assembly 300, causing the first lock core 110 to drive the dial assembly 300 to rotate through the first transmission sleeve 1. The linkage rod 3 moves towards the second lock core 210 in response to the engagement action of the first transmission sleeve 1 with the dial assembly 300, driving the second transmission sleeve 2 to disengage from the dial assembly 300. The unlocking of the second lock core 210 triggers the engagement of the second transmission sleeve 2 with the dial assembly 300, causing the second lock core 210 to drive the dial assembly 300 to rotate through the second transmission sleeve 2. The linkage rod 3 moves towards the first lock core 110 in response to the engagement action of the second transmission sleeve 2 with the dial assembly 300, driving the first transmission sleeve 1 to disengage from the dial assembly 300.

[0066] It can be understood that a transmission structure is provided between the first lock body 100 and the second lock body 200. The transmission structure includes: a first transmission sleeve 1, a second transmission sleeve 2 and a linkage rod 3. The linkage rod 3 axially penetrates through the dial assembly 300 and moves bidirectionally along the axis for responding to the actions of the first transmission sleeve 1 and the second transmission sleeve 2.

[0067] The bidirectional movement of the linkage rod 3 mentioned above means moving towards the direction of the first lock core 110 or towards the direction of the second lock core 210.

[0068] It should be noted that generally this kind of double-lock is installed on a door for use. Therefore, both sides of the double-lock correspond to the indoor and outdoor respectively. In this embodiment, for the convenience of description, it is defined that the side of the first lock body 100 corresponds to the outdoor; the side of the second lock body 200 corresponds to the indoor.

[0069] Such as Figure 1 、 Figure 3 and Figure 5As shown, in the state where the key is not inserted, the double-lock in this embodiment is an axisymmetric structure, and the pin structures of the first lock body 100 and the second lock body 200 are also symmetric structures. That is to say, the first lock body 100 and the second lock body 200 of this double-lock can be unlocked with the same key. The purpose of this design is to facilitate installation and reduce the steps of distinguishing between the inside and the outside during installation.

[0070] However, in other embodiments, in order to further consider the security of the double-lock, the pin structure can also adopt an asymmetric structure, but the structures other than the pin structure still adopt a symmetric structure. That is to say, the first lock body 100 and the second lock body 200 need to be respectively matched with two different keys.

[0071] As Figure 2 , Figure 4 and Figure 6 shown, the following are the unlocking methods of the first lock core 110 and the second lock core 210:

[0072] 1. The unlocking of the first lock body 100 can be achieved by rotating the first lock core 110.

[0073] The first transmission sleeve 1 is arranged between the first lock core 110 and the dial wheel assembly 300. When the key is inserted into the first lock body 100 and in the unlocked state, the tail of the key pushes the first abutting portion 11 of the first transmission sleeve 1, triggering the engagement of the first transmission sleeve 1 and the dial wheel assembly 300. After the linkage rod 3 responds to the engagement action of the first transmission sleeve 1 and the dial wheel assembly 300, it moves towards the second lock core 210. At this time, the linkage rod 3 drives the second transmission sleeve 2 to disengage from the dial wheel assembly 300, and then rotates the key to drive the first lock core 110 to rotate, driving the dial wheel assembly 300 to rotate through the first transmission sleeve 1, realizing the unlocking of the first lock body 100. At this time, since the second transmission sleeve 2 disengages from the dial wheel assembly 300, the second lock body 200 cannot be unlocked;

[0074] 2. The unlocking of the second lock body 200 can be achieved by rotating the second lock core 210.

[0075] The second transmission sleeve 2 is arranged between the second lock core 210 and the dial wheel assembly 300. When the key is inserted into the second lock body 200 and in the unlocked state, the tail of the key pushes the second abutting portion 21 of the second transmission sleeve 2, triggering the engagement of the second transmission sleeve 2 and the dial wheel assembly 300. After the linkage rod 3 responds to the engagement action of the second transmission sleeve 2 and the dial wheel assembly 300, it moves towards the first lock core 110. At this time, the linkage rod 3 drives the first transmission sleeve 1 to disengage from the dial wheel assembly 300, and then rotates the key to drive the second lock core 210 to rotate, driving the dial wheel assembly 300 to rotate through the second transmission sleeve 2, realizing the unlocking of the second lock body 200. At this time, since the first transmission sleeve 1 disengages from the dial wheel assembly 300, the first lock body 100 cannot be unlocked.

[0076] As can be seen from the above, this unlocking method has the following advantages:

[0077] 1. The first lock body 100 and the second lock body 200 are linked and cooperated through the linkage rod 3. Compared with the independent unlocking structure of two independent lock cores, by sharing the dial assembly 300 and the linkage rod 3, the number of parts is reduced while maintaining the double-opening function, making the internal structure of the double-opening lock more concise and compact, and reducing the production cost.

[0078] 2. The two-way movement of the linkage rod 3 responds to the actions of the first drive sleeve 1 and the second drive sleeve 2, forming a forced mechanical interlock for the entire double-opening lock. When the lock core on either side is in the unlocked state, the linkage rod 3 physically blocks the unlocking drive path on the other side, preventing the key from being inserted. The first lock core and the second lock core alternately control the dial assembly to ensure that only one lock core can drive the dial assembly to unlock at the same time, ensuring that the first lock core 110 and the second lock core 210 cannot be unlocked simultaneously. This dynamic linkage has higher security compared to the structure of two independent double-opening locks that can be unlocked simultaneously.

[0079] It should be noted that the above-mentioned unlocked state refers to unlocking with a regular key.

[0080] Specifically, when the double-opening lock in this embodiment is used for home anti-theft, a key can be inserted indoors. At this time, a thief outside the room can neither unlock the first lock core with a regular key nor unlock the first lock core by conventional technical unlocking means, ensuring the safety of people inside the room.

[0081] 3. The engagement between the first drive sleeve 1 or the second drive sleeve 2 and the dial assembly 300 must be established through regular key operation. From the above description of the unlocking action, it can be known that ordinary technical unlocking tools such as pick needles cannot replace the regular key to trigger the engagement or disengagement between the first drive sleeve 1 or the second drive sleeve 2 and the linkage rod 3, nor can they drive the dial assembly 300 to rotate through the first drive sleeve 1 or the second drive sleeve 2 to unlock. Therefore, it effectively resists common technical unlocking means, improves the security of the double-opening lock, and makes it more reliable.

[0082] It should be mentioned that the first drive sleeve 1 has a first limiting hole 12, and the first lock core 110 has a first limiting shaft 111 that cooperates with the first limiting hole 12. The first limiting shaft 111 extends into the first limiting hole 12 to limit the axial displacement of the first drive sleeve 1.

[0083] Similarly, the second drive sleeve 2 has a second limiting hole 22, and the second lock core 210 has a second limiting shaft 211 that cooperates with the second limiting hole 22. The second limiting shaft 211 extends into the second limiting hole 22 to limit the axial displacement of the second drive sleeve 2.

[0084] Specifically, a pre-tightened first transmission spring 120 is provided between the first transmission sleeve 1 and the first lock core 110 to maintain the engagement tendency between the first transmission sleeve 1 and the dial assembly 300; a pre-tightened second transmission spring 220 is provided between the second transmission sleeve 2 and the second lock core 210 to maintain the engagement tendency between the second transmission sleeve 2 and the dial assembly 300.

[0085] Through the first transmission spring 120 and the second transmission spring 220, the first transmission sleeve 1 and the second transmission sleeve 2 are kept engaged with the dial assembly 300 and balanced when no key is inserted on both sides.

[0086] It should be noted that when no key is inserted on both sides, the first transmission sleeve 1 and the second transmission sleeve 2 are both kept engaged with the dial assembly 300. Taking the first lock body 100 as an example: only when a key is inserted into the first lock body 100, the second transmission sleeve 2 will be disengaged from the dial assembly 300 by the linkage rod 3. The same applies to the second lock body 200. The purpose of this is to prevent picking locks with technical means and improve security.

[0087] In this embodiment, an explosion-proof mechanism is also provided. The explosion-proof process of the first explosion-proof mechanism is as follows: an explosion-proof pin 320 is provided on the dial assembly 300, a first explosion-proof groove 31 is provided on the linkage rod 3, and a pre-tightened first explosion-proof spring 33 is provided between one end of the linkage rod 3 close to the first transmission sleeve 1 and the first transmission sleeve 1. When the second lock core 210 is removed, the first transmission spring 120 pushes the first transmission sleeve 1 to engage the dial assembly 300, and the first explosion-proof spring 33 pushes the linkage rod 3 to displace towards the second lock core 210, so that the explosion-proof pin 320 is inserted into the first explosion-proof groove 31 to axially lock the linkage rod.

[0088] That is to say, when the second lock core 210 is removed, the first transmission spring 120 drives the first transmission sleeve 1 to move towards the second lock core 210 to maintain the engagement with the dial assembly 300. At the same time, the first explosion-proof spring drives the linkage rod 3 to move towards the second lock core 210 until the explosion-proof pin 320 is inserted into the first explosion-proof groove 31. This process realizes double locking:

[0089] 1. Axial locking: By inserting the explosion-proof pin 320 into the first explosion-proof groove 31, the axial movement of the linkage rod 3 is restricted;

[0090] 2. Circumferential locking: Since the linkage rod 3 cannot move axially, the first transmission sleeve 1 cannot disengage from the dial assembly 300 to rotate the dial assembly 300.

[0091] In summary, the plug-in connection between the first transmission sleeve 1 and the dial assembly 300 always restricts the rotation of the two, so the dial assembly 300 cannot be rotated to unlock;

[0092] As Figure 21 and 22 shown, the anti-riot process of the second anti-riot mechanism is as follows: A second anti-riot groove 32 is provided on the linkage rod 3, an anti-riot pin 320 is provided on the dial wheel assembly 300, and a pre-tightened second anti-riot spring 34 is provided between one end of the linkage rod 3 close to the second transmission sleeve 2 and the second transmission sleeve 2. When the first lock core 110 is removed, the second transmission spring 220 pushes the second transmission sleeve 2 to engage the dial wheel assembly 300, and the second anti-riot spring 34 pushes the linkage rod 3 to displace towards the second lock core 210, so that the anti-riot pin 320 is inserted into the second anti-riot groove 32 to axially lock the linkage rod 3.

[0093] Similarly to the above, when the first lock core 110 is removed, the second transmission spring 220 drives the second transmission sleeve 2 to move towards the first lock core 110 to maintain the engagement with the dial wheel assembly 300. At the same time, the second explosion-proof spring drives the linkage rod 3 to move towards the first lock core 110 as well until the anti-riot pin 320 is inserted into the second anti-riot groove 32.

[0094] This process also achieves double locking:

[0095] 1. Axial locking: By inserting the anti-riot pin 320 into the second anti-riot groove 32, the axial movement of the linkage rod 3 is restricted;

[0096] 2. Circumferential locking: Since the linkage rod 3 cannot move axially, the second transmission sleeve 2 cannot disengage from the dial wheel assembly 300 to rotate the dial wheel assembly 300.

[0097] In summary, the plug-in connection between the second transmission sleeve 2 and the dial wheel assembly 300 always restricts the rotation of both, so the dial wheel assembly 300 cannot be rotated to unlock.

[0098] Preferably, both the first anti-riot groove 31 and the second anti-riot groove 32 are annular grooves arranged along the circumferential direction of the linkage rod 3.

[0099] The circumferential continuity of the annular groove ensures that the linkage rod 3 is at any angle in the circumferential direction, and the anti-riot pin 320 can complete the insertion without deliberate alignment, avoiding anti-riot failure caused by insertion deviation.

[0100] Furthermore, in the optimal embodiment of the present invention, an elastic element is provided on the dial wheel assembly 300, and the elastic element biases the anti-riot pin 320 towards the linkage rod 3. The elastic element is specifically a spring, and there are two anti-riot pins 320.

[0101] In order to enable the anti-riot pin 320 to withstand greater force after being inserted into the first anti-riot groove 31 or the second anti-riot groove 32, the anti-riot pins 320 are arranged oppositely. That is to say, the installation angle between the two anti-riot pins 320 is 180°, making the structure more stable.

[0102] Furthermore, in other embodiments, the anti-explosion pin 320 can also be inserted into the first anti-explosion groove 31 by relying on its own gravity. At this time, the length of the anti-explosion pin 320 needs to be greater than the depth of the first anti-explosion groove 31 to play a role in restricting the axial movement of the linkage rod 3;

[0103] Similarly to the above, the anti-explosion pin 320 can also be inserted into the second anti-explosion groove 32 by relying on its own gravity. At this time, the length of the anti-explosion pin 320 needs to be greater than the depth of the second anti-explosion groove 32 to play a role in restricting the axial movement of the linkage rod 3.

[0104] This is because the anti-explosion pin 320 is provided on the dial assembly 300. Since the radial height of the dial assembly 300 is limited, in order to ensure that the length of the anti-explosion pin 320 is sufficient to be inserted into the first anti-explosion groove 31 and play an axial positioning role, it is preferably to adopt a method of biasing the anti-explosion pin 320 through an elastic element. This biasing through the elastic element can absorb part of the mechanical impact, reduce the wear between the anti-explosion pin 320 and the dial assembly 300, and when the linkage rod 3 moves to the position where the anti-explosion pin 320 is inserted into the first anti-explosion groove 31 or the second anti-explosion groove 32, the elastic pre-tightening force of the elastic element ensures that the anti-explosion pin 320 forms a stable contact with the first anti-explosion groove 31 or the second anti-explosion groove, maintaining the locked state.

[0105] This integrated mechanical structure protection method avoids unlocking the lock by force. Although the structure is simple, it significantly improves the security of the lock and makes it more reliable to use.

[0106] It should be noted that the first transmission spring 120 drives the first transmission sleeve 1 to move towards the direction of the second lock core 210, so as to ensure that the first transmission sleeve 1 is always in a engaged state with the dial assembly 300. In order to enable the linkage rod 3 to obtain sufficient power to move towards the second lock core 210 so that the anti-explosion pin 320 is inserted into the first anti-explosion groove 31, a first anti-explosion spring 33 in a pre-tightened state is added between the end of the linkage rod 3 close to the first transmission sleeve 1 and the first transmission sleeve 1. Through the elastic thrust generated by the first anti-explosion spring 33, sufficient driving force can be provided for the linkage rod 3, making the anti-explosion mechanism more reliable and stable;

[0107] The second lock body 200 is the same as above. The second transmission spring 220 drives the second transmission sleeve 2 to move towards the direction where the first lock core 110 is located, so as to ensure that the second transmission sleeve 2 is always in an engaged state with the dial assembly 300. In order to enable the linkage rod 3 to obtain sufficient power to move towards the first lock core 110 so that the anti-explosion pin 320 is inserted into the second anti-explosion groove 32, a pre-tightened second anti-explosion spring 34 is added between the end of the linkage rod 3 close to the second transmission sleeve 2 and the second transmission sleeve 2. The elastic thrust generated by the second anti-explosion spring 34 can provide sufficient driving force for the linkage rod 3, making the anti-explosion mechanism more reliable and stable.

[0108] Moreover, the first anti-explosion spring can not only be used to provide sufficient driving force for the linkage rod 3, but also form a flexible connection between the first transmission sleeve 1, the second transmission sleeve 2 and the linkage rod 3 through the spring itself. This flexible connection can not only reduce the mechanical buffer of the linkage rod 3 placed between the first transmission sleeve 1 and the second transmission sleeve 2, absorb the impact generated by the engagement to reduce wear, but also be used to compensate for tolerances. Specifically, during the production of the double-opening lock, the axial clearance between the linkage rod 3 and the first transmission sleeve 1 and the second transmission sleeve 2 may be stuck due to processing errors, etc. Through the flexible connection formed between the linkage rod 3 and the first transmission sleeve 1 and the second transmission sleeve 2 by the first anti-explosion spring 33 and the second anti-explosion spring 34, the minimum clearance is always maintained among the three. The cumulative tolerances generated during production are absorbed through the elastic deformation of the first anti-explosion spring 33 and the second anti-explosion spring 34 to ensure the smooth cooperation of the transmission structure.

[0109] It can be known from this that the transmission structure in this technical solution not only makes the internal structure of the double-opening lock simple and has the advantages brought by the above transmission structure itself, but also can combine the cooperation of the anti-explosion pin 320 and the first anti-explosion groove 31 and the second anti-explosion groove 32 on the linkage rod 3 to achieve the anti-explosion function, killing two birds with one stone.

[0110] In this embodiment, the first lock body 100 has the above-mentioned first anti-explosion mechanism and the second lock body 200 also has the above-mentioned second anti-explosion mechanism at the same time. Therefore, the double-opening lock proposed in this embodiment is a double-opening lock with anti-explosion functions on both sides, which is applicable to scenarios such as banks with high safety requirements.

[0111] In actual use, it is also possible to choose that only the first lock body 100 has the first anti-explosion mechanism; or, only the second lock body 200 has the second anti-explosion mechanism. These two usage situations are applicable to the household entrance door and can mainly be used to prevent theft.

[0112] Or, the anti-explosion mechanism can also not be selected, which is applicable to scenarios with not overly high safety requirements.

[0113] The applicable scenarios mentioned above are only for facilitating the understanding of the technical solution and are not limited to the applicable scope mentioned above.

[0114] As Figure 22 shown, the dial wheel assembly 300 includes an unlocking dial wheel 330, an inner dial wheel 340, and a connecting member 350. The unlocking dial wheel 330 is sleeved on the outer periphery of the inner dial wheel 340, the inner dial wheel 340 is sleeved on the outer periphery of the connecting member 350, and the unlocking dial wheel 330, the inner dial wheel 340, and the connecting member 350 are fixedly connected by fixing pins 310. The linkage rod 3 is located inside the connecting member 350.

[0115] It should be noted that the first transmission sleeve 1 and the second transmission sleeve 2 are joined to the connecting member 350.

[0116] As Figure 23 shown, the inner dial wheel 340 has at least one tapered end, and the tapered end forms a tapered structure 341.

[0117] This tapered structure 341 causes the contact surface of the brute-force unlocking tool (such as a wrench or a crowbar) to change from a plane to an inclined plane when the brute-force unlocking tool clamps the outer peripheral surface of the inner dial wheel 340. Therefore, when a force is applied by the brute-force unlocking tool, there will be a relative sliding tendency between the contact surface of the brute-force unlocking tool and the inner dial wheel 340, making it impossible for the brute-force unlocking tool to stably bite the surface of the inner dial wheel 340, thereby reducing the torque transmission ability and increasing the security of the double-lock.

[0118] The above-mentioned tapered structure 341 is specifically set as a tapered conical surface in this embodiment, or it can also be a tapered trapezoid, etc.

[0119] Specifically, as Figure 24 shown, in this embodiment, the double-lock further includes a first lock housing 112 provided outside the first lock core 110, a second lock housing 212 provided outside the second lock core 210, and a dial wheel lock housing 311 provided outside the dial wheel assembly 300. The first lock housing 112, the second lock housing 212, and the dial wheel lock housing 311 are integrally formed. The first lock housing 112 and the dial wheel lock housing 311 are connected by a first reduced-diameter section 312, and the cross-section of the first reduced-diameter section 312 is smaller than the cross-sections of the first lock housing 112 and the dial wheel lock housing 311.

[0120] The cross-section of the first reduced-diameter section 312 is smaller than the cross-sections of the first lock housing 110 and the dial wheel lock housing 311. The first tapered section 312 is used to reduce the cross-sectional area at the connection, reducing the connection strength between the first lock housing 110 and the dial wheel lock housing 311. Therefore, when an external force acts on the first lock housing 110, the first reduced-diameter section 312 will break due to insufficient strength, and the first lock housing 112 will be separated from the dial wheel lock housing 311, keeping the dial wheel housing 311 intact, and the dial wheel assembly 300 still requires the correct key to rotate and unlock.

[0121] The second lock housing 212 and the dial lock housing 311 are connected by a second tapered section 213, and the cross-section of the second reduced-diameter section 213 is smaller than the cross-sections of the second lock housing 212 and the dial lock housing 311.

[0122] The cross-section of the second reduced-diameter section 213 is smaller than the cross-sections of the second lock housing 212 and the dial lock housing 311. The second reduced-diameter section 213 is used to reduce the cross-sectional area at the connection, thereby reducing the connection strength between the second lock housing 212 and the dial lock housing 311. Therefore, when an external force acts on the second lock housing 212, the second reduced-diameter section 213 will break due to insufficient strength, causing the second lock housing 212 to separate from the dial lock housing 311, keeping the dial lock housing 311 intact, and the dial assembly 300 still requires the correct key to rotate and unlock.

[0123] In the double-opening lock that requires explosion-proof on both sides in this embodiment, the first reduced-diameter section 312 and the second reduced-diameter section 213 can be provided simultaneously.

[0124] In other embodiments, if only one side needs to be explosion-proof, for example, only the outdoor side needs to be explosion-proof, then only the first reduced-diameter section 312 needs to be provided.

[0125] Both ends of the dial lock housing 311 have tapered inclined surfaces 311a. When a violent unlocking tool (such as a wrench or a crowbar) clamps the outer peripheral surface of the dial lock housing 311, the contact surface of the violent unlocking tool changes from a plane to an inclined surface. Therefore, when a force is applied by the violent unlocking tool, there will be a relative sliding trend with the contact surface of the dial lock housing 311, making it impossible for the violent unlocking tool to stably bite the surface of the dial lock housing 311, thereby reducing the torque transmission ability and increasing the safety of the double-opening lock.

[0126] The engagement of the first transmission sleeve 1, the second transmission sleeve 2 and the dial assembly 300 forms a plug-in connection that restricts their relative rotation and allows their relative axial movement.

[0127] In this preferred embodiment, as Figures 7 to 10 , Figure 19 shown, the first transmission sleeve 1 has a first transmission pin 13 arranged eccentrically, and the dial assembly 300 has a first transmission groove 360 arranged eccentrically. The first transmission pin 13 and the first transmission groove 360 are inserted or separated from each other as the first transmission sleeve 1 axially displaces. According to the above, only when the second lock core 210 is in the unlocked state will the first transmission pin 13 separate from the first transmission groove 360.

[0128] In other embodiments, it is also possible to make the first transmission sleeve 1 have a first transmission groove 360 arranged eccentrically, and the dial assembly 300 is provided with a first transmission pin 13.

[0129] Specifically, there are two first drive pins 13, so there are also two first drive slots 360 that cooperate with them. In order to enable the two first drive pins 13 to withstand greater torque after being inserted into the first drive slots 360, the two first drive pins 13 are arranged oppositely. That is to say, the installation angle between the two first drive pins 13 is 180°, making the structure more stable.

[0130] In other embodiments, such as Figures 11 to 18 , Figure 20 shown, the first drive sleeve 1 is provided with a first drive hole 14, and the dial wheel assembly 300 is provided with a first drive post 370. The first drive hole 14 and the first drive post 370 are coaxially arranged;

[0131] Or, the first drive sleeve 1 is provided with a first drive post 370, and the dial wheel assembly 300 is provided with a first drive hole 14. The first drive post 370 and the first drive hole 14 are coaxially arranged.

[0132] Specifically, the outer peripheral surface of the first drive post 370 has a first drive surface 371, and the inner surface of the first drive hole 14 has a second drive surface 141. The first drive post 370 is inserted into the first drive hole 14, and the first drive surface 371 and the second drive surface 141 form a complementary structure for transmitting torque.

[0133] Generally speaking, as long as the first drive post 370 and the first drive hole 14 are in a non-circular structure fit.

[0134] No matter which of the above fitting methods, it is to make the first drive post 370 and the first drive hole 14 form a plug connection that restricts their relative rotation and allows their relative axial movement.

[0135] In this preferred embodiment, the second drive sleeve 2 has an eccentric second drive pin 23, and the dial wheel assembly 300 has an eccentric second drive slot 380. The second drive pin 23 and the second drive slot 380 are inserted or separated from each other as the second drive sleeve 2 axially displaces. According to the above, it can be known that only when the first lock core 110 is in the unlocked state, the second drive pin 23 will be separated from the second drive slot 380.

[0136] In other embodiments, it is also possible to make the second drive sleeve 2 have an eccentric second drive slot 380, and the dial wheel assembly 300 is provided with a second drive pin 23.

[0137] Specifically, there are two second drive pins 23, so there are also two second drive slots 380 that cooperate with them. In order to enable the two second drive pins 23 to withstand greater torque after being inserted into the second drive slots 380, the two first drive pins 13 are arranged oppositely. That is to say, the installation angle between the two second drive pins 23 is 180°, making the structure more stable.

[0138] In other embodiments, the second transmission sleeve 2 is provided with a second transmission hole 24, and the dial wheel assembly 300 is provided with a second transmission post 390. The second transmission hole 24 and the second transmission post 390 are coaxially arranged.

[0139] Alternatively, the second transmission sleeve 2 is provided with a second transmission post 390, and the dial wheel assembly 300 is provided with a second transmission hole 24. The second transmission post 390 and the second transmission hole 24 are coaxially arranged.

[0140] Specifically, the outer peripheral surface of the second transmission post 390 has a third transmission surface 391, and the inner surface of the second transmission hole 24 has a fourth transmission surface 241. The second transmission post 390 is inserted into the first transmission hole 14, and the third transmission surface 391 and the fourth transmission surface 241 form a complementary structure for transmitting torque.

[0141] Generally speaking, as long as the first transmission post 370 and the first transmission hole 14 are in a non-circular structure fit.

[0142] No matter which of the above cooperation methods, it is to make the second transmission post 390 and the second transmission hole 24 form a plug connection that restricts their relative rotation and allows their relative axial movement.

[0143] In this preferred embodiment, the first transmission sleeve 1 is selected to have an eccentric first transmission pin 13, and the dial wheel assembly 300 has an eccentric first transmission groove 360; the second transmission sleeve 2 has an eccentric second transmission pin 23, and the dial wheel assembly 300 has an eccentric second transmission groove 380, this combination method.

[0144] In other embodiments, the first transmission sleeve 1 can be selected to be provided with a first transmission hole 14, the dial wheel assembly 300 is provided with a first transmission post 370, and the first transmission hole 14 and the first transmission post 370 are coaxially arranged; the second transmission sleeve 2 is provided with a second transmission hole 24, the dial wheel assembly 300 is provided with a second transmission post 390, and the second transmission hole 24 and the second transmission post 390 are coaxially arranged, this combination method.

[0145] It can also be selected. Here, one of the combination methods is exemplified: the first transmission sleeve 1 has an eccentric first transmission pin 13, the dial wheel assembly 300 has an eccentric first transmission groove 360; the second transmission sleeve 2 is provided with a second transmission hole 24, the dial wheel assembly 300 is provided with a second transmission post 390, and the second transmission hole 24 and the second transmission post 390 are coaxially arranged.

[0146] The above is only for illustrative purposes and will not be listed one by one here. As long as it is in the form of the above combination, or the technical means that achieves the purpose of restricting their relative rotation and allowing their relative axial movement fall within the protection scope.

[0147] In summary, the engagement of the first drive sleeve 1, the second drive sleeve 2 and the dial wheel assembly 300 all constitute a plug-in structure that restricts their relative rotation and allows their relative axial movement. This plug-in structure locks the relative rotation between the first drive sleeve 1, the second drive sleeve 2 and the dial wheel assembly 300 through a physical limit structure. This rigid connection avoids slippage or misalignment of the torque during transmission.

[0148] In addition to the above preferred embodiments, the present invention has other implementation manners. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection claimed by the present invention.

Claims

1. A double-opening lock, comprising a first lock body, a second lock body and a thumbwheel assembly located therebetween, wherein the first lock body comprises a first lock core that can rotate after being unlocked, and the second lock body comprises a second lock core that can rotate after being unlocked, characterized in that: The double-opening lock also includes a transmission structure located between the first lock body and the second lock body, the transmission structure including: a first transmission sleeve arranged between the first lock core and the thumbwheel assembly, engaging or disengaging the thumbwheel assembly through axial displacement; a second transmission sleeve arranged between the second lock core and the thumbwheel assembly, engaging or disengaging the thumbwheel assembly through axial displacement; a linkage rod, which axially penetrates the thumbwheel assembly and can move in both directions along the axis, the unlocking of the first lock core triggers the engagement of the first transmission sleeve with the thumbwheel assembly, so that the first lock core drives the thumbwheel assembly to rotate through the first transmission sleeve, and the linkage rod moves toward the second lock core in response to the engagement action of the first transmission sleeve with the thumbwheel assembly, driving the second transmission sleeve to disengage from the thumbwheel assembly; the unlocking of the second lock core triggers the engagement of the second transmission sleeve with the thumbwheel assembly, so that the second lock core drives the thumbwheel assembly to rotate through the second transmission sleeve, and the linkage rod moves toward the first lock core in response to the engagement action of the second transmission sleeve with the thumbwheel assembly, driving the first transmission sleeve to disengage from the thumbwheel assembly.

2. A double-opening lock according to claim 1, characterized in that: The engagement of the first transmission sleeve and the thumbwheel assembly forms a plug-in connection which limits the relative rotation of the two and allows the two to move axially relative to each other.

3. A double-opening lock according to claim 2, characterized in that: One of the first transmission sleeve and the thumbwheel assembly has an eccentrically arranged first transmission pin, and the other has an eccentrically arranged first transmission groove, and the first transmission pin and the first transmission groove are plugged into or separated from each other with the axial displacement of the first transmission sleeve; or, one of the first transmission sleeve and the thumbwheel assembly has a coaxial first transmission column, and the other has a coaxial first transmission hole, and the first transmission column and the first transmission hole constitute a plug-in connection that limits the relative rotation of the two and allows the two to move axially relative to each other.

4. A double-opening lock according to claim 1, characterized in that: The engagement of the second transmission sleeve and the thumbwheel assembly forms a plug-in connection which limits the relative rotation of the two and allows the two to move axially relative to each other.

5. A double-opening lock according to claim 4, characterized in that: One of the second transmission sleeve and the thumbwheel assembly has an eccentrically arranged second transmission pin, and the other has an eccentrically arranged second transmission groove, and the second transmission pin and the second transmission groove are plugged into or separated from each other with the axial displacement of the second transmission sleeve; or, one of the second transmission sleeve and the thumbwheel assembly has a coaxial second transmission column, and the other has a coaxial second transmission hole, and the second transmission column and the second transmission hole constitute a plug-in connection that limits the relative rotation of the two and allows the two to move axially relative to each other.

6. A double-opening lock according to claim 1, characterized in that: A pre-tightened first transmission spring is provided between the first transmission sleeve and the first lock core, for maintaining the engagement tendency of the first transmission sleeve and the thumbwheel assembly; a pre-tightened second transmission spring is provided between the second transmission sleeve and the second lock core, for maintaining the engagement tendency of the second transmission sleeve and the thumbwheel assembly.

7. A double-opening lock according to claim 6, characterized in that: An anti-explosion pin is provided on the thumbwheel assembly, a first anti-explosion groove is provided on the linkage rod, a pre-tightened first anti-explosion spring is provided between one end of the linkage rod close to the first transmission sleeve and the first transmission sleeve, when the second lock core is removed, the first transmission spring pushes the first transmission sleeve to engage the thumbwheel assembly, the first anti-explosion spring pushes the linkage rod to move in the direction of the second lock core, so that the anti-explosion pin is inserted into the first anti-explosion groove and axially locks the linkage rod; and\or, a second anti-explosion groove is provided on the linkage rod, a pre-tightened second anti-explosion spring is provided between one end of the linkage rod close to the second transmission sleeve and the second transmission sleeve, when the first lock core is removed, the second transmission spring pushes the second transmission sleeve to engage the thumbwheel assembly, the second anti-explosion spring pushes the linkage rod to move in the direction of the second lock core, so that the anti-explosion pin is inserted into the second anti-explosion groove and axially locks the linkage rod.

8. A double-opening lock according to claim 7, characterized in that: The first anti-riot groove is an annular groove arranged along the circumference of the linkage rod; and\or, the second anti-riot groove is an annular groove arranged along the circumference of the linkage rod.

9. A double-opening lock according to claim 7, characterized in that: The anti-explosion pin is configured to be driven by its own gravity to be inserted into the first anti-explosion groove or the second anti-explosion groove; or, an elastic element is provided on the thumbwheel assembly, and the elastic element biases the anti-explosion pin toward the linkage rod.

10. A double-opening lock according to claim 1, characterized in that: The thumbwheel assembly includes an inner thumbwheel having at least one tapered end.

11. A double-opening lock according to claim 1, characterized in that: It includes a first lock shell arranged on the outside of the first lock core, a second lock shell arranged on the outside of the second lock core, and a thumbwheel lock shell arranged on the outside of the thumbwheel assembly, the first lock shell, the second lock shell and the thumbwheel lock shell are integrally formed, the first lock shell and the thumbwheel lock shell are connected by a first reduced diameter section, the cross-section of the first reduced diameter section is smaller than the cross-sections of the first lock shell and the thumbwheel lock shell; and\or, the second lock shell and the thumbwheel lock shell are connected by a second reduced diameter section, the cross-section of the second reduced diameter section is smaller than the cross-sections of the second lock shell and the thumbwheel lock shell.

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