Double-lock structure

Abstract

The utility model discloses a double lock structure which comprises a lock cylinder, a key and a lock shell, a second key plate and a first key plate are formed on the key, unlocking convex teeth are formed at the upper end of the first key plate, and the unlocking convex teeth are used for being inserted into first lock bead holes from inside to outside so as to push first lock beads to the outer ends of the first lock bead holes. An unlocking groove is formed in one side of the second key plate, and an unlocking limiting structure used for limiting the unlocking convex teeth to be inserted into the first lock bead hole is formed in the lock hole; the key is provided with an unlocking position relative to the lock hole, at the unlocking position, the unlocking protruding teeth are inserted into the first lock ball holes, the inner ends of the second lock balls are inserted into the unlocking pits, the outer ends of the second lock balls are flush with the outer wall of the lock container, and the key is connected with the unlocking limiting structure in an attached mode. The double-lock structure is good in anti-theft performance.

Description

Technical Field

[0001] This utility model relates to the field of lock structure, specifically to a double lock structure. Background Technology

[0002] Currently, lock structures mainly consist of a cylinder, a case, pins, and a key. The outer wall of the cylinder is cylindrical, and the cylinder rotates within a circular hole in the case. When the key is inserted into the keyhole of the cylinder, the grooves on the key match the pins, causing them to move away from the outer cylindrical surface of the cylinder, thus rotating the cylinder. The cylinder is connected to a lever, which rotates to drive external lock mechanisms, such as the bolt. However, by inserting lock-picking tools like tin foil into the keyhole, the pins can be pressed into the foil, making it easy to open the lock. Therefore, the existing lock structure has poor anti-theft performance and needs improvement. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a double lock structure with better anti-theft performance.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] This utility model discloses a double lock structure, including a lock cylinder, a key, and a lock shell. The lock cylinder is rotatably disposed within the lock shell, and the lock cylinder has a keyhole for axial insertion of the key. The lock shell is slidably connected to a first locking bead and a lock shell pin. The lock cylinder has a first locking bead hole and a second locking bead hole. The first locking bead can slide into the first locking bead hole, and a second locking bead is slidably connected to the second locking bead hole. The key has a second key plate and a first key plate. The upper part of the second key plate is connected to the lower part of the first key plate. The upper end of the first key plate has an unlocking protrusion for inserting from the inside to the outside of the first locking bead hole to push the first locking bead to the outer end of the first locking bead hole. One side of the second key plate has an unlocking recess, and the outer end of the first locking bead is correspondingly provided for pushing the first locking bead into the first locking bead hole. The lock cylinder has a first spring in the locking bead hole, and a second spring corresponding to the outer end of the lock shell pin for pushing the inner end of the second locking bead into the unlocking recess. An unlocking limiting structure is formed inside the lock hole to limit the insertion of the unlocking protrusion into the first locking bead hole. The lock cylinder has a locked position relative to the lock shell. In the locked position, the inner end of the first locking bead is located inside the first locking bead hole, and the outer end of the first locking bead is located inside the lock shell. The outer end of the second locking bead is offset from the outer wall of the lock cylinder, and the outer end of the second locking bead is abutted against the inner end of the lock shell pin. The key has an unlocked position relative to the lock hole. In the unlocked position, the unlocking protrusion is inserted into the first locking bead hole, the inner end of the second locking bead is inserted into the unlocking recess, the outer end of the second locking bead is flush with the outer wall of the lock cylinder, and the key abuts against the unlocking limiting structure.

[0006] Preferably, the lock hole includes a second slot and a first slot, the first double lock bead hole is connected to the upper end of the first slot, the second double lock bead hole is connected to the second slot, the second slot is offset from the first slot to the left and right, the upper part of the second slot is connected to the lower part of the first slot, the width of the second slot is adapted to the thickness of the second double key plate, and the width of the first slot is adapted to the thickness of the first double key plate.

[0007] Preferably, the unlocking limiting structure is located at the upper end of the second slot, and the upper end of the second key plate can be attached to the upper end of the second slot.

[0008] Preferably, the first key plate is height-adapted to the first slot.

[0009] Preferably, the inner end of the first locking bead hole is formed with a first bead hole bottom edge for limiting the first locking bead, and the inner end of the second locking bead hole is formed with a second bead hole bottom edge for limiting the second locking bead.

[0010] Preferably, the width of the first slot is smaller than the inner diameter of the first locking bead hole.

[0011] Preferably, the first and second locking bead holes are arranged axially at intervals.

[0012] Preferably, the rear end of the key has a convex arc edge, and the front end of the key has a handle.

[0013] Preferably, the first key plate has a tooth root surface, the unlocking protrusion is formed on the tooth root surface, and in the unlocking position, the tooth root surface is abutting the upper end of the first slot.

[0014] Preferably, the upper part of the second key plate is integrally stacked with the lower part of the first key plate.

[0015] Compared with the prior art, the advantages of this utility model are as follows: A first locking bead and a locking bead spring are slidably connected to the lock shell; a first locking bead hole and a second locking bead hole are formed on the lock cylinder; the first locking bead can slide into the first locking bead hole; a second locking bead is slidably connected to the second locking bead hole; the key consists of a second key plate and a first key plate; the upper part of the second key plate is connected to the lower part of the first key plate; the upper end of the first key plate has a groove for inserting the first locking bead from the inside out. The double lock has an unlocking protrusion that pushes the first double lock bead to the outer end of the first double lock bead hole. An unlocking recess is formed on one side of the second key plate. A first spring is provided at the outer end of the first double lock bead to push the first double lock bead into the first double lock bead hole. A second spring is provided at the outer end of the lock shell ball to push the inner end of the second double lock bead into the unlocking recess. An unlocking limiting structure is formed in the lock hole to limit the insertion of the unlocking protrusion into the first double lock bead hole, so that the anti-theft performance of the double lock structure of this utility model is better. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the lock cylinder and key combination of this utility model.

[0017] Figure 2 This is an exploded view of the lock cylinder and key of this utility model.

[0018] Figure 3 Based on Figure 1 A schematic diagram of a partially sectional three-dimensional structure.

[0019] Figure 4 This is a front view structural diagram of the lock cylinder of this utility model.

[0020] Figure 5 This is a cross-sectional view of the key of this utility model from the front view.

[0021] Figure 6 This is a cross-sectional view of the lock shell and lock cylinder of this utility model in the locked state from the front view.

[0022] Figure 7 This is a schematic diagram of the key being inserted into the lock hole according to this utility model.

[0023] Figure 8 This is a schematic diagram of the unlocked state of the double lock structure of this utility model.

[0024] Labeling Explanation: Lock cylinder 1; Lock hole 11; First slot 112; Second slot 111; Inward chamfered step 113; Inward straight step 114; First double lock bead hole 12; First bead hole bottom edge 121; Second double lock bead hole 13; Second bead hole bottom edge 131; Key 2; Handle 20; Second double key plate 21; Unlocking recess 211; First double key plate 22; Unlocking protrusion 221; Tooth root surface 2211; Outer straight step 201; Outer chamfered step 202; Convex arc edge 203; Lock case 3; First double lock bead 31; First spring 32; First plug 33; Second double lock bead 34; Lock case pin 35; Second spring 36; Second plug 37. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] The double lock structure of this utility model, such as Figures 1 to 6 As shown, the lock includes a cylinder 1, a key 2, and a lock housing 3. The cylinder 1 is rotatably disposed within the lock housing 3. For example, the cylinder 1 has an outer cylindrical surface, and the lock housing 3 has an inner cylindrical surface. The outer cylindrical surface and the inner cylindrical surface are fitted and connected. The cylinder 1 has a keyhole 11 for axial insertion of the key 2. Here, "axial" refers to a direction parallel to (or approximately parallel to) the rotation axis of the cylinder 1. For example, the rear end of the cylinder 1 can be used to connect a lever. Figure 6 As shown, the lock case 3 is slidably connected with a first locking ball 31 and a lock case spring 35, as follows: Figure 2 As shown, the lock cylinder 1 has a first locking bead hole 12 and a second locking bead hole 13, so the first locking bead 31 can slide into the first locking bead hole 12, and the second locking bead 34 is slidably connected in the second locking bead hole 13. Figure 2 and Figure 5 As shown, the key 2 has a second key plate 21 and a first key plate 22. The upper part of the second key plate 21 is connected to the lower part of the first key plate 22. The combined structure of the second key plate 21 and the first key plate 22 is equivalent to joining two traditional keys together. Figure 2 , Figure 3 and Figure 8As shown, the upper end of the first key plate 22 has an unlocking protrusion 221 for inserting into the first lock ball hole 12 from the inside out to push the first lock ball 31 to the outer end of the first lock ball hole 12. That is, the lock hole 11 connects to the first lock ball hole 12. The "from the inside out" mentioned above is relative to the rotation center of the lock cylinder 1. Therefore, "from the inside out" can be roughly in the direction outward along the radius of the lock cylinder 1. An unlocking recess 211 is formed on one side of the second key plate 21. Figure 6 As shown, the outer end of the first locking bead 31 is provided with a first spring 32 for pushing the first locking bead 31 into the first locking bead hole 12, and the outer end of the lock shell ball 35 is provided with a second spring 36 for pushing the inner end of the second locking bead 34 into the unlocking recess 211. That is, the lock hole 11 is connected to the second locking bead hole 13. Specifically, the lock shell 3 has a first mounting hole and a second mounting hole. The first spring 32 is disposed in the first mounting hole, and the first locking bead 31 is adapted to slide in the first mounting hole. The outer end of the first mounting hole is also provided with a first plug 33, which supports the elastic restoring force of the first spring 32. The lock shell ball 35 is adapted to slide in the second mounting hole, and the first spring 32 is disposed in the second mounting hole. The outer end of the second mounting hole is provided with a second plug 37. Figure 6 As shown, the second mounting hole can be perpendicular to the first mounting hole, that is, the first double-locking bead hole 12 is perpendicular to the second double-locking bead hole 13. An unlocking limiting structure is formed within the lock hole 11 to limit the insertion of the unlocking protrusion 221 into the first double-locking bead hole 12. In other words, during the movement of the unlocking protrusion 221 from the inside out, when the key 2 contacts the aforementioned unlocking limiting structure, the key 2 is limited, and thus the unlocking protrusion 221 is also limited, ensuring that the extent to which the unlocking protrusion 221 lifts the first double-locking bead 31 is accurate. Figure 6 As shown, the cylinder 1 is in a locked position relative to the lock housing 3, meaning that the cylinder 1 cannot rotate relative to the lock housing 3 in this position. In the locked position, the inner end of the first locking bead 31 is located inside the first locking bead hole 12 (the "inner end" here refers to the end of the first locking bead 31 that is relatively close to the rotation axis of the cylinder 1), and the outer end of the first locking bead 31 is located inside the lock housing 3. Therefore, the rotation of the cylinder 1 will be blocked by the first locking bead 31. At this time, the outer cylindrical surface of the cylinder 1 passes through the first locking bead 31, and the outer end of the second locking bead 34 is misaligned with the outer wall of the cylinder 1 (that is, the outer cylindrical surface of the cylinder 1). The outer end of the second locking bead 34 is close to the inner end of the connecting ball 35 of the lock housing. Figure 6 In the example, the outer end of the second locking bead 34 can be located inside the outer cylindrical surface of the lock cylinder 1. Alternatively, the outer end of the second locking bead 34 can be located outside the outer cylindrical surface of the lock cylinder 1. Because the outer end of the second locking bead 34 is misaligned with the outer wall of the lock cylinder 1, the rotation of the lock cylinder 1 will be blocked by the second locking bead 34 or the lock shell pin 35. Figure 8As shown, the key 2 has an unlocked position relative to the keyhole 11. In the unlocked position, the unlocking protrusion 221 is inserted into the first locking bead hole 12, and the inner end of the second locking bead 34 is inserted into the unlocking recess 211. The outer end of the second locking bead 34 is flush with the outer wall of the lock cylinder 1. The key 2 is attached to the unlocking limiting structure. As mentioned above, the unlocking protrusion 221 inserted into the first locking bead hole 12 can push the first locking bead 31 to the outer end of the first locking bead hole 12. That is to say, in the above-mentioned unlocked position, the contact part between the unlocking protrusion 221 and the first locking bead 31 is just located at the outer end of the first locking bead hole 12, that is, the contact part between the unlocking protrusion 221 and the first locking bead 31 is just located at the outer cylindrical surface of the lock cylinder 1. At this time, the first spring 32 is further compressed, and the inner end of the first locking bead 31 can form a conical head structure. Figure 8 As shown, the outer end of the second locking bead 34 can be a cylindrical surface matching the outer wall of the lock cylinder 1; in Figure 8 In the state shown, the lock cylinder 1 can rotate relative to the lock case 3.

[0027] The unlocking process of the double lock structure of this utility model is as follows: Figure 2 As shown, inserting key 2 into the keyhole 11 means that the second key plate 21 and the first key plate 22 are inserted into the keyhole 11. This can be achieved by the handle 20 of key 2 contacting the front end face of the lock cylinder 1, allowing key 2 to be axially inserted into place. Figure 7 As shown, at this time, since the unlocking recess 211 of the second key plate 21 is not yet aligned with the second lock bead 34, but rather the second key plate 21 pushes the second lock bead 34 outward, causing the outer end of the second lock bead 34 to protrude from the outer wall of the lock cylinder 1, that is, the second lock is not yet unlocked. Then, the key 2 is lifted upward, causing the unlocking protrusion 221 to be inserted from the inside to the outside into the first lock bead hole 12 to push the first lock bead 31 to the outer end of the first lock bead hole 12. At the same time, the key 2 is blocked and limited by the aforementioned unlocking limiting structure. At this time, the first lock is unlocked. Upon unlocking, the second key plate 21 moves upward, causing the unlocking recess 211 to align with the second locking bead 34. The lock shell pin 35, through the elastic restoring force of the second spring 36, pushes the second locking bead 34 inward, inserting its inner end into the unlocking recess 211. By setting the appropriate depth of the unlocking recess 211, the outer end of the second locking bead 34 is flush with the outer wall of the lock cylinder 1, thus unlocking the second lock. Afterward, the key 2 can be turned, causing the lock cylinder 1 to rotate. Figure 8 In the illustrated embodiment, since the inner end of the second locking bead 34 is inserted into the unlocking recess 211, the key 2 cannot be removed from the lock cylinder 1 in the unlocked state. To prevent the second locking bead 34 and the lock housing pin 35 from rotating, a structure guiding the lock housing pin 35 can be provided in the aforementioned second mounting hole. When locking is required, first turn the key 2 to... Figure 8The indicated position is such that the first mounting hole is aligned with the first heavy lock bead hole 12, and the second mounting hole is aligned with the second heavy lock bead hole 13. Then, push the key 2 downwards, causing the unlocking protrusion 221 to disengage from the first heavy lock bead hole 12. The elastic restoring force of the first spring 32 pushes the first heavy lock bead 31 into the first heavy lock bead hole 12. The second key plate 21 pushes open the second heavy lock bead 34. Then, pull the key 2 forward. Since the second heavy lock bead 34 is no longer obstructed by the key 2, it returns to its original position due to the elastic restoring force of the second spring 36. Figure 6 The state shown.

[0028] The combination of the first and second locks in this invention increases the complexity of the lock structure and unlocking action. Because the flat, soft structure of the tin foil strip easily forms grooves, it is difficult to simulate the action of the unlocking protrusion 221 inserting into the first lock bead hole 12. Therefore, the double lock structure of this invention is relatively difficult to pick, and its anti-theft performance is good. The position of the aforementioned unlocking limiting structure determines whether the first lock bead 31 can move accurately to… Figure 8 As shown in the image, the aforementioned unlocking limit structure also increases the difficulty of unauthorized opening.

[0029] Furthermore, such as Figure 4 As shown, the lock hole 11 includes a second slot 111 and a first slot 112. A first double-locking bead hole 12 connects to the upper end of the first slot 112, and a second double-locking bead hole 13 connects to the second slot 111. The second slot 111 and the first slot 112 are offset left and right. The upper part of the second slot 111 connects to the lower part of the first slot 112, thus forming the lock hole 11. Figure 4 As shown, this actually creates an inward inverted step 113 and an inward upright step 114 in the keyhole 11, as... Figure 7 As shown, the width of the second slot 111 is adapted to the thickness of the second key plate 21, and the width of the first slot 112 is adapted to the thickness of the first key plate 22. Figure 6 From a visual perspective, the width of the second slot 111 refers to its width in the left-right direction, and the width of the first slot 112 refers to its width in the left-right direction. Figure 2 and Figure 5 As shown, the first key plate 22 and the second key plate 21 are also offset to the left and right, so that the key 2 has an outer positive step 201 and an outer inverted step 202. Through the above arrangement, the key hole 11 is a tortuous structure, which can increase the difficulty of theft tools to pry up and down in the key hole 11, so that the anti-theft performance of the double lock structure of this utility model is better.

[0030] Furthermore, such as Figure 4 and Figure 8As shown, the above-mentioned unlocking limiting structure is set at the upper end of the second slot 111, and the upper end of the second key plate 21 can be attached to the upper end of the second slot 111. That is to say, the above-mentioned unlocking limiting structure is set as an inward step 113. Specifically, the outer positive step 201 of the key 2 can be attached to the inward step 113. In other words, the zigzag keyhole 11 can also easily form a structure for limiting the movement of the unlocking protrusion 221 outward, which is conducive to simplifying the structure of the keyhole 11 and the key 2. Moreover, the structure of the inward step 113 is simple and stable, and it is not easy to wear out in daily use.

[0031] Furthermore, such as Figure 7 As shown, the first key plate 22 is height-fitted to the first slot 112, that is, in Figure 7 From a visual perspective, the length of the first key plate 22 is along the front-to-back direction, the thickness of the first key plate 22 is along the left-to-right direction, and the height of the first key plate 22 is along the up-down direction. Since the first key plate 22 is height-matched to the first slot 112, that is, the upper end of the first key plate 22 (including the unlocking protrusion 221) abuts against the upper inner wall of the first slot 112, and the lower end of the first key plate 22 (i.e., the...)... Figure 5 The outward-facing step 202 in the middle abuts against the lower inner wall of the first slot 112 (i.e., the... Figure 4 The inner step 114 in the middle), through the above settings, such as Figure 7 As shown, when the key 2 is inserted into the keyhole 11, the first slot 112 can guide the key 2 in a straight line, preventing the user from feeling that the keyhole 11 is loose, which helps to improve the user experience.

[0032] Furthermore, such as Figure 4 As shown, the inner end of the first locking bead hole 12 has a first bead hole bottom edge 121 for limiting the first locking bead 31, and the inner end of the second locking bead hole 13 has a second bead hole bottom edge 131 for limiting the second locking bead 34. The second bead hole bottom edge 131 is equivalent to an inner flange structure, as shown. Figure 6 As shown, when the key 2 is not inserted into the lock hole 11, the inner edge of the first locking bead 31 is pressed against the bottom edge 121 of the first bead hole by the elastic restoring force of the first spring 32, so that the first locking bead 31 can be stably kept in the locked position. Similarly, in the locked position, the inner edge of the second locking bead 34 is pressed against the bottom edge 131 of the second bead hole.

[0033] Furthermore, such as Figure 4As shown, the width of the first slot 112 (in the left-right direction) is smaller than the inner diameter of the first double-locking bead hole 12. Therefore, the inner end of the first double-locking bead hole 12 is connected to the upper end of the first slot 112. Thus, the edge of the upper end of the first slot 112 can block and limit the first double-locking bead 31. That is to say, the edge of the upper end of the first slot 112 can serve as the bottom edge 121 of the first bead hole. The above-mentioned limiting structure is relatively simple and easy to process.

[0034] Furthermore, such as Figure 2 As shown, the first locking bead hole 12 and the second locking bead hole 13 are arranged axially at intervals, thus, as Figure 3 As shown, the unlocking protrusions 221 and unlocking recesses 211 are arranged at intervals. Specifically, the first lock bead holes 12 can be evenly spaced or unevenly spaced, and the unlocking recesses 211 can also be unevenly spaced. Since each unlocking protrusion 221 must correspond one-to-one with the first lock bead hole 12 to unlock the first lock, the difficulty of copying the key 2 is increased, and the difficulty of being stolen is also increased. Therefore, the double lock structure of this utility model has better anti-theft performance.

[0035] Furthermore, such as Figure 2 As shown, the rear end of the key 2 has a convex arc edge 203, and the front end of the key 2 has a handle 20. In other words, the rear end edge of the key 2 is an arc edge. The center of the arc of the convex arc edge 203 can be located in the middle of the combination of the second key plate 21 and the first key plate 22 in the vertical direction. When the key 2 is inserted into the lock hole 11, if the convex arc edge 203 touches the lower edge of the opening of the lock hole 11, the convex arc edge 203 can guide the lower edge of the opening of the lock hole 11, so that the key 2 can be guided to slide into the lock hole 11.

[0036] Furthermore, such as Figure 2 As shown, the first key plate 22 has a tooth root surface 2211, and the unlocking protrusion 221 is formed on the tooth root surface 2211, as shown. Figure 3 As shown, in the unlocking position mentioned above, the tooth root surface 2211 is abutted against the upper end of the first slot 112. Thus, the upper end of the first slot 112 also serves to block and limit the unlocking protrusion 221. After the key 2 has been inserted and removed for a long time, the outer positive step 201 may wear. Therefore, the structure of the upper end of the first slot 112 limiting the tooth root surface 2211 serves as a supplement, which helps to increase the service life of the key 2.

[0037] Furthermore, such as Figure 5As shown, the upper part of the second key plate 21 is integrally stacked with the lower part of the first key plate 22. That is, the upper part of the second key plate 21 is stacked with the lower part of the first key plate 22, and the upper part of the second key plate 21 and the lower part of the first key plate 22 are integrally connected, which helps to improve the structural strength of the key 2. The second key plate 21 and the first key plate 22 can be formed by processing on the same copper plate.

Claims

1. A double lock structure comprising a lock cylinder (1), a key (2) and a lock housing (3), the lock cylinder (1) being rotatably provided in the lock housing (3), the lock cylinder (1) being formed with a lock hole (11) for axial insertion of the key (2), characterized in that: The lock shell (3) is slidably connected with a first heavy lock ball (31) and a lock shell ball (35), the lock cylinder (1) is formed with a first heavy lock ball hole (12) and a second heavy lock ball hole (13), the first heavy lock ball (31) can slide into the first heavy lock ball hole (12), the second heavy lock ball hole (13) is slidably connected with a second heavy lock ball (34), the key (2) is formed with a second heavy key plate (21) and a first heavy key plate (22), the upper part of the second heavy key plate (21) is connected with the lower part of the first heavy key plate (22), the upper end of the first heavy key plate (22) is formed with an unlocking protruding tooth (221) for inserting into the first heavy lock ball hole (12) from inside to outside to push the first heavy lock ball (31) to the outer end of the first heavy lock ball hole (12), one side of the second heavy key plate (21) is formed with an unlocking recess (211), the outer end of the first heavy lock ball (31) is correspondingly provided with a first spring (32) for pushing the first heavy lock ball (31) into the first heavy lock ball hole (12), the outer end of the lock shell ball (35) is correspondingly provided with a second spring (36) for pushing the inner end of the second heavy lock ball (34) into the unlocking recess (211), the lock hole (11) is formed with an unlocking limiting structure for limiting the insertion of the unlocking protruding tooth (221) into the first heavy lock ball hole (12). The lock cylinder (1) has a locking position relative to the lock shell (3), in the locking position, the inner end of the first heavy lock ball (31) is located in the first heavy lock ball hole (12), the outer end of the first heavy lock ball (31) is located in the lock shell (3), the outer end of the second heavy lock ball (34) is dislocated from the outer wall of the lock cylinder (1), and the outer end of the second heavy lock ball (34) abuts against the inner end of the lock shell ball (35). The key (2) has an unlocking position relative to the lock hole (11), in the unlocking position, the unlocking protruding tooth (221) is inserted into the first heavy lock ball hole (12), the inner end of the second heavy lock ball (34) is inserted into the unlocking recess (211), the outer end of the second heavy lock ball (34) is flush with the outer wall of the lock cylinder (1), and the key (2) abuts against the unlocking limiting structure.

2. The dual lock structure of claim 1, wherein: The lock hole (11) comprises a second slot (111) and a first slot (112), the first heavy lock ball hole (12) communicates with the upper end of the first slot (112), the second heavy lock ball hole (13) communicates with the second slot (111), the second slot (111) and the first slot (112) are arranged in left and right dislocation, the upper part of the second slot (111) communicates with the lower part of the first slot (112), the width of the second slot (111) is adapted to the thickness of the second heavy key plate (21), and the width of the first slot (112) is adapted to the thickness of the first heavy key plate (22).

3. The dual lock structure of claim 2, wherein: The unlocking limiting structure is arranged at the upper end of the second slot (111), and the upper end of the second relocking key plate (21) can abut against and connect the upper end of the second slot (111).

4. The dual lock structure according to claim 2 or 3, wherein: The first relocking key plate (22) is high in adaptability to the first slot (112).

5. The dual lock structure according to any one of claims 1 to 3, wherein: The inner end of the first relocking bead hole (12) is formed with a first bead hole bottom edge (121) for limiting the first relocking bead (31), and the inner end of the second relocking bead hole (13) is formed with a second bead hole bottom edge (131) for limiting the second relocking bead (34).

6. The dual lock structure of claim 5, wherein: The width of the first slot (112) is smaller than the inner diameter of the first relocking bead hole (12).

7. The dual lock structure according to any one of claims 1 to 3, wherein: The first relocking bead hole (12) and the second relocking bead hole (13) are arranged axially and spaced apart.

8. The dual lock structure according to any one of claims 1 to 3, wherein: The rear end of the key (2) is formed with a convex arc edge (203), and the front end of the key (2) is formed with a handle (20).

9. The dual lock structure according to claim 2 or 3, wherein: The first relocking key plate (22) is formed with a dedendum surface (2211), and the unlocking convex tooth (221) is formed on the dedendum surface (2211), and in the unlocking position, the dedendum surface (2211) abuts against the upper end of the first slot (112).

10. The dual lock structure according to claim 2 or 3, wherein: The upper part of the second relocking key plate (21) is integrally and abutted with the lower part of the first relocking key plate (22).

Images