Inward-opening mechanical lock and usage method

Abstract

An inward-opening mechanical lock and its usage method belong to the technical field of locks. The present invention solves the problem that the traditional pin tumbler lock has a simple structure and can be opened by experienced people without tools and keys, resulting in certain insecurity. The lock of the present invention includes a housing, an inner housing, a rotating shaft, a lock core, a connecting piece and a lock piece. The inner housing is sleeved inside the housing. The rotating shaft passes through the connecting piece and the lock core in sequence. After the lock core and the connecting piece are connected by the rotating shaft, they are placed inside the inner housing. A gear is installed on the rotating shaft. An external tooth ring is machined on the inner side wall of the inner housing. The gear of the rotating shaft meshes with the external tooth ring. A locking piece is fixedly installed on the connecting piece. The locking piece is installed inside the lock core and fixed by a pin. The pin is installed in cooperation with the locking piece through a pin spring. A connecting ring is installed on the lock piece. A connecting block is installed at the end of the rotating shaft. The connecting block and the connecting ring are coaxially arranged. A second spring is sleeved on the rod end of the rotating shaft. The anti-theft lock of the present invention has a complex structure and good safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and specifically to a new type of anti-theft lock. Background Art

[0002] With the rapid development of technology, the types of locks have gradually increased. The existing types of locks include electronic locks, padlocks, drawer locks, pin tumbler locks, mortise locks, etc.

[0003] Pin tumbler locks and mortise locks are generally applied to door locks. The pin tumbler lock is also known as a marble lock, a spring lock or a latch lock. It is a most common lock structure. The principle is to use multiple cylindrical parts of different heights, generally called marbles, to lock the lock core. When the correct key is inserted, each lock spring is pushed to the same height, and the lock core is released.

[0004] Since the development history of pin tumbler locks has been more than a hundred years, the internal structure of pin tumbler locks is very simple. For an experienced locksmith, even without a torque wrench and a lock pick, only a safety pin can be used to open it.

[0005] Therefore, the present invention proposes a new type of anti-theft lock to solve the problems that the existing pin tumbler lock has a simple structure and is easily cracked. Summary of the Invention

[0006] The present invention solves the problem that the traditional pin tumbler lock has a simple structure and can be opened by an experienced person without tools and keys, which has certain insecurity. Furthermore, "an inward-opening mechanical lock and its usage method" is disclosed. A brief summary of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this summary is not an exhaustive summary of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0007] The technical solution of the present invention is as follows:

[0008] Solution 1: An inward-opening mechanical lock, including a lock and a key. The lock includes an outer shell, an inner shell, a rotating shaft, a lock core, a connecting piece and a lock piece. The inner shell is sleeved inside the outer shell. The rotating shaft sequentially passes through the connecting piece and the lock core. The lock core is connected to the connecting piece through the rotating shaft and is placed inside the inner shell. A gear is installed on the rotating shaft. An external gear ring is machined on the inner side wall of the inner shell. The gear on the rotating shaft meshes with the external gear ring. A locking piece is fixedly installed on the connecting piece. The locking piece is installed inside the lock core and is fixed by a marble. The marble is installed in cooperation with the locking piece through a marble spring. A connecting ring is installed on the lock piece. A connecting block is installed at the end of the rotating shaft. The connecting block and the connecting ring are coaxially arranged. A second spring is sleeved on the rod end of the rotating shaft.

[0009] The key includes a sub-key, a mother key and a handle. The sub-key is processed with grooves corresponding to the marbles. The sub-key is clamped on the mother key. A push rod is installed on the handle. The push rod is slidably arranged in the mother key. The mother key is processed with a connection hole. The push rod and the connection hole are coaxially arranged. The sub-key is inserted into the lock core through the keyhole on the outer shell. The rotating shaft is connected to the connection hole on the mother key. The sub-key rotates inside the lock core to unlock the lock.

[0010] Further, a gasket is arranged between the lock core and the connecting piece. Positioning columns are symmetrically installed on the connecting piece. The lock core and the gasket are connected to the connecting piece through the positioning columns.

[0011] Further, a notch sleeve is sleeved inside the inner shell. The notch sleeve is fixedly connected to the inner side wall of the inner shell. The notch of the notch sleeve is in mating connection with the sub-key.

[0012] Further, two first springs are symmetrically installed on the lock core. A pressing plate is sleeved on the rod end of the rotating shaft. The end face of the pressing plate contacts the first spring and the second spring.

[0013] Further, positioning protrusions are symmetrically installed on the connecting piece. Positioning grooves are arranged at corresponding positions of the lock core. The positioning protrusions are in mating connection with the positioning grooves.

[0014] Further, a special-shaped piece is fixedly sleeved on the rotating shaft. One end of the special-shaped piece contacts the gear.

[0015] Further, the number of teeth of the outer gear ring is twice the number of teeth of the gear.

[0016] Solution Two: The usage method of the inward-opening mechanical lock based on Solution One includes the following steps:

[0017] Step One: Insert the sub-key of the key into the lock core through the keyhole of the lock. Push the push rod through the handle to make the rotating shaft in the lock core pass through the connection hole and connect with the push rod.

[0018] Step Two: After the rotating shaft is connected to the push rod, the sub-key is separated from the mother key. Rotate the handle to drive the push rod to drive the rotating shaft to rotate. The gear on the rotating shaft drives the outer gear ring meshing with it to rotate. The inner shell starts to rotate. The inner shell drives the sub-key to rotate to the position of the marbles in the lock core. Align the marbles through the sub-key so that the marbles no longer fixedly lock the locking piece.

[0019] Step Three: Push the handle again. The push rod pushes the rotating shaft to drive the connecting piece to move forward, so that the connecting block at the end of the rotating shaft is connected to the connecting ring on the lock piece.

[0020] Step Four: Continue to rotate the handle. The push rod drives the rotating shaft to rotate. The end of the rotating shaft drives the lock piece to rotate through the cooperation of the connecting block and the connecting ring, and the lock is opened.

[0021] Step 5: After unlocking is completed, the rotating shaft is bounced back under the action of the second spring. Rotate the handle to return the sub-key to its starting position and align it with the bayonet of the master key. Pull the handle to make the sub-key snap onto the master key, disconnect the connection between the push rod and the rotating shaft, and pull the master key to pull out the sub-key, thus completing one unlocking operation.

[0022] The advantages of the present invention compared with the prior art are as follows:

[0023] Compared with the traditional pin tumbler lock, the internal structure of the internal-opening mechanical lock of the present invention is more complex. Unlocking is carried out inside the lock core through separable keys. The lock is opened by controlling the sub-key with the master key and the handle, making it impossible to complete the unlocking work without a complete key or only a part of the key, significantly improving the safety performance of the pin tumbler lock.

[0024] The internal structure of the internal-opening mechanical lock of the present invention is clear, which is very convenient for the installation and disassembly of the lock. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of the internal-opening mechanical lock;

[0026] Figure 2 is the exploded view of the lock (rear view);

[0027] Figure 3 is the exploded view of the lock (front view);

[0028] Figure 4 is the schematic diagram of the cooperation relationship between the lock core and the inner shell;

[0029] Figure 5 is the schematic diagram of the cooperation relationship between the lock core, the gasket and the connecting piece;

[0030] Figure 6 is the structural schematic diagram of the key;

[0031] Figure 7 is the structural schematic diagram of the rotating shaft;

[0032] Figure 8 is the schematic diagram of the cooperation relationship between the rotating shaft and the push rod;

[0033] Figure 9 is the exploded schematic diagram of the key;

[0034] Figure 10 is Figure 3 the partial schematic diagram of

[0035] In the figure, 1 - lock, 2 - key, 3 - outer shell, 4 - inner shell, 5 - rotating shaft, 6 - gear, 7 - first spring, 8 - pressing plate, 9 - external gear ring, 10 - lock core, 11 - gasket, 12 - connecting piece, 13 - locking piece, 14 - keyhole, 15 - notch sleeve, 16 - connecting ring, 17 - positioning post, 18 - locking sheet, 19 - connecting block, 20 - second spring, 21 - ball spring, 22 - ball, 23 - sub - key, 24 - groove, 25 - master key, 26 - handle, 27 - connecting hole, 28 - push rod, 29 - special - shaped piece, 30 - positioning protrusion, 31 - positioning groove, 36 - limiting groove, 37 - limiting bead, 38 - third spring, 39 - limiting piece, 40 - key shell, 41 - positioning groove, 42 - clamping groove. Detailed implementation mode

[0036] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the descriptions of well - known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0037] Example 1, in combination with Figures 1 - 10 To illustrate this embodiment, the inward - opening mechanical lock of this embodiment includes a lock 1 and a key 2.

[0038] When the lock 1 is in the locked state, there is a certain distance between the connecting block 19 on the rotating shaft 5 and the connecting ring 16 on the locking piece 13, and the locking piece 13 is in the locked state; when unlocking, the sub - key 23 of the key 2 is inserted through the keyhole 14 of the outer shell 3 of the lock 1, and the sub - key 23 is inserted through the keyhole 14 into the notch at the inner notch sleeve 15 of the inner shell 4. When the sub - key 23 is completely inserted, the end of the rotating shaft 5 enters the connecting hole 27 of the master key 25. Push the handle 26 inward, and the handle 26 pushes the push rod 28 inward to establish a connection between the push rod 28 and the rotating shaft 5. The end of the push rod 28 is processed with a connecting groove, and the end of the rotating shaft 5 is processed with a connecting protrusion. The connecting protrusion of the rotating shaft 5 is connected to the connecting groove of the push rod 28. The connecting groove of the push rod 28 can be a hexagonal groove, and the end of the rotating shaft 5 can be provided with a hexagonal connecting protrusion. The cooperation connection between the hexagonal protrusion and the groove makes the connection between the push rod 28 and the rotating shaft 5 more stable, and it is not easy to produce a tripping situation after a long time of use (such as Figure 8As shown, the sub-key 23 clamped to the mother key 25 disengages from the mother key 25. Rotating the handle 26 drives the push rod 28 to rotate. The push rod 28 drives the rotating shaft 5 to rotate. The gear 6 on the rotating shaft 5 meshes with the external gear ring 9 machined on the inner side wall of the inner shell 4, and the number of teeth of the external gear ring 9 is twice that of the gear 6. Driven by the gear 6, the inner shell 4 rotates within the outer shell 3, driving the sub-key 23 to rotate. When the handle 26 is turned one full circle, the sub-key 23 is at the bottom of the lock core 10. The groove 24 on the sub-key 23 pushes the pin 22 at the bottom of the lock core 10 into the lock core 10 and compresses the pin spring 21, so that the pin 22 no longer locks the locking piece 18 within the lock core 10. At this time, the gasket 11 and the connecting piece 12 can be pushed inward through the handle 26. Pushing the handle 26 inward, the special-shaped piece 29 on the rotating shaft 5 pushes the gasket 11 and the connecting piece 12 inward. The function of the special-shaped piece 29 is to prevent the rotating shaft 5 from disengaging from the lock core 10, the gasket 11, and the connecting piece 12 during the pushing process. The special-shaped piece 29 is a special-shaped circular piece, and the diameter of the circular piece is larger than the diameter of the holes on the gasket 11 and the connecting piece 12. There is a notch machined on the circular piece. When the circular piece is rotated, the rotating shaft 5 can be separated from the gasket 11 and the connecting piece 12 through the notch. The hexagonal connecting block at the end of the rotating shaft 5 is fitted and installed with the hexagonal groove on the connecting ring 16 of the lock piece 13. Rotating the handle 26 again, driven by the rotation of the rotating shaft 5 through the handle 26, the hexagonal connecting block at its end drives the lock piece 13 to rotate and unlock.

[0039] The mother key 25 is slidably installed within the key case 40. The sub-key 23 is clamped to the protruding part of the key case 40. The push rod of the handle 26 sequentially passes through the key case 40 and the mother key 25. A third spring 38 and a limiting member 39 are sequentially sleeved on the push rod 28. There is a limiting bead 37 within the mother key 25. The limiting member 39 is machined with an elliptical hole that cooperatively connects with the limiting bead 37. When the push rod 28 is pushed inward through the handle 26, the end of the push rod 28 is connected to the rotating shaft 5. The limiting bead 37 within the mother key 25 is stuck within the elliptical hole of the limiting member 39, causing the sub-key 23 to disengage from the key case 40 and no longer be clamped. After unlocking, the sub-key 23 is clamped to the protruding part of the key case 40. Through the resilience of the third spring 38, the mother key 25 is pulled outwards, thus taking out the sub-key 23. The third spring 38 functions for resilience and compression. The outer shell 3 is machined with a positioning groove 41. The keyhole 14 is provided on the positioning groove 41. The positioning groove 41 is also machined with a card slot 42. The side wall of the mother key 25 is machined with a limiting groove 36 at the corresponding position. When the sub-key 23 is inserted into the keyhole 14, the mother key 25 is disposed within the positioning groove 41. To fix the mother key 25 and prevent it from moving around, the mother key 25 is slightly rotated so that the limiting groove 36 on the mother key 25 is stuck within the card slot 42 of the positioning 41. The mother key 25 will not move around. After unlocking, the mother key 25 can be pulled out by rotating it in the reverse direction.

[0040] After unlocking, under the action of the restoring force of the first spring 7 sleeved on the rotating shaft 5 and the two second springs 20 in the lock core 10, the rotating shaft 5 is pushed back. Rotate the handle 26 on the key 2 again. Under the action of the gear 6 and the external gear ring 9 of the inner shell 4, the sub-key 23 is rotated back to the initial position. After the sub-key 23 leaves the pin 22 at the bottom of the lock core 10, the pin 22 is under the action of the restoring force of the pin spring 21, so that the pin 22 continues to lock the locking piece 18 on the connecting piece 12 tightly in the lock core 10. The sub-key 23 is butted with the bayonet of the mother key 25 and clamped on the mother key 25. Pull the handle 26 so that the push rod 28 is no longer connected to the rotating shaft 5, and pull the mother key 25 outwards to pull out the sub-key 23 from the keyhole 14.

[0041] Embodiment 2, in combination with Figures 1 - 10 To illustrate this embodiment, the usage method of the inward-opening mechanical lock in this embodiment includes the following steps:

[0042] Step 1: Insert the sub-key 23 of the key into the lock core 10 through the keyhole 14 of the lock 1, and push the push rod 28 through the handle 26 so that the rotating shaft 5 in the lock core 10 passes through the connection hole 27 and is connected to the push rod 28;

[0043] Step 2: After the rotating shaft 5 is connected to the push rod 28, the sub-key 23 is separated from the mother key 25. Rotate the handle 26 to drive the push rod 28 to drive the rotating shaft 5 to rotate. The gear 6 on the rotating shaft 5 drives the meshing external gear ring 9 to rotate, and the inner shell 4 starts to rotate. The inner shell 4 drives the sub-key 23 to rotate to the position of the pin 22 in the lock core 10, and aligns the pin 22 through the sub-key 23, so that the pin 22 no longer fixes the locking piece 18;

[0044] Step 3: Push the handle 26 again, and the push rod 28 pushes the rotating shaft 5 to drive the connecting piece 12 to move forward, so that the connecting block 19 at the end of the rotating shaft 5 is connected to the connecting ring 16 on the lock piece 13;

[0045] Step 4: Continue to rotate the handle 26, the push rod 28 drives the rotating shaft 5 to rotate. The end of the rotating shaft 5 drives the lock piece 13 to rotate through the cooperation of the connecting block 19 and the connecting ring 16, and the lock is opened;

[0046] Step 5: After unlocking is completed, under the action of the second spring 20, the rotating shaft 5 is bounced back. Rotate the handle 26 to make the sub-key 23 return to the starting position and align with the bayonet of the mother key 25. Pull the handle 26 to make the sub-key 23 clamped on the mother key 25. Disconnect the push rod 28 from the rotating shaft 5, and pull the mother key 25 to pull out the sub-key 23 to complete one unlocking.

[0047] This embodiment is only an exemplary illustration of this patent and does not limit its protection scope. Those skilled in the art can also make partial changes to it. As long as it does not exceed the spirit of this patent, it is within the protection scope of this patent.

Claims

1. Inward-opening mechanical lock, comprising a lock (1) and a key (2), characterized in that: The lock (1) includes a housing (3), an inner housing (4), a rotating shaft (5), a lock core (10), a connecting piece (12), and a locking piece (13). The inner housing (4) is sleeved inside the housing (3). The rotating shaft (5) sequentially passes through the connecting piece (12) and the lock core (10). After the lock core (10) is connected to the connecting piece (12) through the rotating shaft (5), it is placed inside the inner housing (4). A gear (6) is installed on the rotating shaft (5). An external gear ring (9) is machined on the inner side wall of the inner housing (4). The gear (6) on the rotating shaft (5) meshes with the external gear ring (9). A locking piece (18) is fixedly installed on the connecting piece (12). The locking piece (18) is installed inside the lock core (10) and fixed by a pin (22). The pin (22) is installed in cooperation with the locking piece (18) through a pin spring (21). A connecting ring (16) is installed on the locking piece (13). A connecting block (19) is installed at the end of the rotating shaft (5). The connecting block (19) and the connecting ring (16) are coaxially arranged. A second spring (20) is sleeved on the rod end of the rotating shaft (5); The key (2) includes a sub-key (23), a mother key (25), and a handle (26). A groove (24) corresponding to the pin (22) is machined on the sub-key (23). The sub-key (23) is clamped on the mother key (25). A push rod (28) is installed on the handle (26). The push rod (28) is slidably arranged inside the mother key (25). A connecting hole (27) is machined on the mother key (25). The push rod (28) and the connecting hole (27) are coaxially arranged. The sub-key (23) is inserted into the lock core (10) through the keyhole (14) on the housing (3). The rotating shaft (5) establishes a connection with the connecting hole (27) on the mother key (25). The sub-key (23) rotates inside the lock core (10) to unlock; A gasket (11) is arranged between the lock core (10) and the connecting piece (12). Positioning posts (17) are symmetrically installed on the connecting piece (12). The lock core (10) and the gasket (11) are connected to the connecting piece (12) through the positioning posts (17); A notch sleeve (15) is sleeved inside the inner housing (4). The notch sleeve (15) is fixedly connected to the inner side wall of the inner housing (4). The notch of the notch sleeve (15) is connected in cooperation with the sub-key (23); The mother key (25) is slidably installed inside the key housing (40). The sub-key (23) is clamped with the protruding part of the key housing (40). The push rod of the handle (26) sequentially passes through the key housing (40) and the mother key (25). A third spring (38) and a limiting member (39) are sequentially sleeved on the push rod (28). There is a limiting bead (37) inside the mother key (25). An elliptical hole for cooperating with the limiting bead (37) is machined on the limiting member (39).

2. The inward-opening mechanical lock according to claim 1, wherein: Two first springs (7) are symmetrically installed on the lock core (10). A pressing plate (8) is sleeved on the rod end of the rotating shaft (5). The end face of the pressing plate (8) contacts the first spring (7) and the second spring (20).

3. The inward-opening mechanical lock according to claim 2, wherein: The connecting piece (12) is symmetrically provided with positioning protrusions (30), and positioning grooves (31) are arranged at corresponding positions of the lock core (10). The positioning protrusions (30) are connected in cooperation with the positioning grooves (31).

4. The inward-opening mechanical lock according to claim 3, characterized in that: The special-shaped piece (29) is fixedly sleeved on the rotating shaft (5), and one end of the special-shaped piece (29) contacts the gear (6).

5. The inward-opening mechanical lock according to claim 4, wherein: The number of teeth of the outer gear ring (9) is twice that of the gear (6).

6. The usage method of the inward-opening mechanical lock according to claim 1, characterized in that, It includes the following steps: Step 1: Insert the sub-key (23) of the key into the lock core (10) through the keyhole (14) of the lock (1). Push the push rod (28) through the handle (26) so that the rotating shaft (5) in the lock core (10) passes through the connecting hole (27) and is connected to the push rod (28). Step 2: After the rotating shaft (5) is connected to the push rod (28), the sub-key (23) is separated from the master key (25). Rotate the handle (26) to drive the push rod (28) to drive the rotating shaft (5) to rotate. The gear (6) on the rotating shaft (5) drives the meshing outer gear ring (9) to rotate, and the inner shell (4) starts to rotate. The inner shell (4) drives the sub-key (23) to rotate to the position of the pin (22) of the lock core (10), and aligns the pin (22) through the sub-key (23) so that the pin (22) no longer fixes the locking piece (18). Step 3: Push the handle (26) again. The push rod (28) pushes the rotating shaft (5) to drive the connecting piece (12) to move forward, so that the connecting block (19) at the end of the rotating shaft (5) is connected to the connecting ring (16) on the lock piece (13). Step 4: Continue to rotate the handle (26). The push rod (28) drives the rotating shaft (5) to rotate. The end of the rotating shaft (5) drives the lock piece (13) to rotate through the cooperation installation of the connecting block (19) and the connecting ring (16), and the lock is opened. Step 5: After the unlocking is completed, the rotating shaft (5) is bounced back under the action of the second spring (20). Rotate the handle (26) to make the sub-key (23) return to the starting position and align with the bayonet of the master key (25). Pull the handle (26) to make the sub-key (23) be clamped on the master key (25), disconnect the connection between the push rod (28) and the rotating shaft (5), and pull the master key (25) to pull out the sub-key (23) to complete one unlocking.

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