Anti-theft lock head with two-stage locking structure
The two-level locking structure with enhanced anti-theft performance and idling functionality addresses the limitations of existing locks by incorporating a main and secondary unlocking mechanism, ensuring robust security and operation in small-volume locks.
Patent Information
- Application Number
- CN202010275653.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-09
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2040-04-09
AI Technical Summary
Existing anti-theft lock structures are not suitable for small-volume locks and lack an idling function.
A two-level locking structure with a main and secondary unlocking mechanism, featuring a shell, lock core, and blades with grooves and restricting grooves, allowing the lock core to idle when abnormal unlocking occurs, enhanced by return springs, unlocking balls, and elastic devices.
The structure provides enhanced anti-theft performance and idling functionality suitable for small-volume locks.
Smart Images
Figure CN111305652B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an anti-theft lock head with a secondary locking structure. Background Art
[0002] In the patent document of Chinese patent authorization announcement number CN102535972B, the invention name is a kind of anti-theft lock lock head with two-stage locking structure, an anti-theft lock lock head structure is disclosed. Figure 2 (a) Attachment Figure 2 (b) and Figure 5 As shown, each blade is provided with a main groove 16 and an auxiliary groove 17, and a plurality of restraining grooves 23 are provided on both sides of the auxiliary groove 17. When unlocking normally, the auxiliary unlocking key 5 and the main unlocking key 4 slide out of their corresponding unlocking key grooves in sequence so that the lock core 2 can be linked with each blade 11. When a master key or other tools are used for abnormal unlocking, since each blade is provided with a plurality of restraining grooves 23, the auxiliary unlocking key 5 can enter one of the restraining grooves 23 more easily, but the main unlocking key 4 cannot smoothly enter its corresponding main groove 16 during the rotation process of the lock core 2, so that the lock core 2 is stuck and cannot rotate, thereby achieving the purpose of anti-theft.
[0003] Although the above structure can achieve the purpose of anti-theft, it is not suitable for small-volume locks and does not have the function of idling.
[0004] Therefore, there is a need to improve the existing anti-theft lock cylinder structure. Summary of the invention
[0005] The object of the present invention is to provide an anti-theft lock head having an idling function, enhanced anti-theft performance and suitable for a small-volume secondary locking structure.
[0006] To achieve the above object, the present invention adopts the following technical solutions:
[0007] The anti-theft lock head with a two-level locking structure comprises a shell, a lock core, a main unlocking piece and a secondary unlocking piece; a main groove and a secondary groove are respectively arranged on the inner wall of the shell along the axial direction of the shell; the lock core is installed in the shell, and a plurality of blades are arranged in parallel perpendicular to the axial direction of the lock core in the lock core, and a first key groove and a second key groove are provided on the peripheral wall of the lock core corresponding to the main groove and the secondary groove; the edge of each blade is respectively provided with a main groove and a secondary groove, and the edge of each blade is provided with one or more restricting grooves on one side or both sides of its secondary groove; the main unlocking piece has an inner card key and an outer card key; the locked state When the lock is unlocked, the outer key is in the main groove and the inner key is in the first key groove, the auxiliary unlocking piece is in the auxiliary groove and the second key groove at the same time, and the lock core is connected to the shell; when unlocking, the auxiliary unlocking piece first separates from the shell and falls into the auxiliary groove of the same blade, and then the outer key separates from the shell and pushes the inner key into the main groove; when the auxiliary unlocking piece separates from the shell and falls into any restricting groove of a blade and the outer key cannot separate from the shell and push the inner key into the main groove of the same blade, the outer key remains in the main groove and the inner key completely falls into the first key groove, and the lock core and the shell can rotate relative to each other and are in an idling state.
[0008] The advantages of the present invention are: it has an idling function, stronger anti-theft performance, and is suitable for a small volume.
[0009] The present invention can be improved by the following scheme:
[0010] A return spring is arranged in the lock core corresponding to each blade. The insertion of the key can make each blade overcome the action of the return spring and make each main groove and auxiliary groove into a straight line. When unlocking, the auxiliary and main unlocking parts fall into the straight auxiliary groove and main groove formed by each blade respectively.
[0011] The projection of the auxiliary groove on a cross section perpendicular to the central axis of the housing is in the shape of a triangle or a trapezoid, and the base of the triangle or the lower base of the trapezoid is close to one side of the lock core.
[0012] The auxiliary unlocking piece includes an unlocking plate and two auxiliary unlocking balls; both ends of the unlocking plate are formed with abutting notches, the unlocking plate is inserted into the lock core and an auxiliary unlocking spring is arranged between the lock core; two auxiliary grooves are arranged on the inner wall of the shell corresponding to the abutting notches; the two auxiliary unlocking balls each fall on the abutting notches, and the unlocking plate pushes against the two auxiliary unlocking balls against the corresponding auxiliary grooves under the action of the auxiliary unlocking spring, and when the lock core rotates relative to the shell, the auxiliary groove squeezes the auxiliary unlocking ball to leave the auxiliary groove, and the unlocking plate compresses the auxiliary unlocking spring to fall into the auxiliary groove or the restraining groove of the blade.
[0013] The outer shell is provided with a rotation groove, and a toggle head cover is arranged on the lock core and placed in the rotation groove. The inner wall of the toggle head is provided with a third key groove corresponding to the first key groove, and the outer key is formed with a convex rib extending along the length direction of the outer key, and the convex rib is accommodated in the third key groove.
[0014] The thickness of the external key is equal to the depth of the main groove and the depth of the main groove, the depth of the third key groove is greater than the depth of the main groove, and the thickness of the rib is greater than the depth of the main groove but less than or equal to the depth of the third key groove.
[0015] The outer card key forms abutment tops on both sides of the convex rib, and the outer shell is symmetrically provided with elastic devices on both sides of the rotating groove. The elastic devices act on the corresponding abutment tops respectively. When unlocking, the outer card key pushes the inner card key into the main groove of the same blade under the action of the elastic device.
[0016] The shell is symmetrically provided with two radial holes extending radially and connected to the main groove. The elastic device includes a main unlocking ball and a main unlocking spring. The main unlocking spring is arranged in the corresponding radial holes and the main unlocking ball is located between the main unlocking spring and the corresponding abutting top. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the three-dimensional state of the overall structure of the anti-theft lock head with a secondary locking structure in an embodiment.
[0018] Figure 2 It is a longitudinal cross-sectional view of the anti-theft lock head with a secondary locking structure in the embodiment (through the axial direction of the anti-theft lock head with a secondary locking structure, when a key is inserted and locked).
[0019] Figure 3 It is a schematic diagram of the exploded three-dimensional state of the anti-theft lock head with a two-level locking structure in the embodiment.
[0020] Figure 4 It is a cross-sectional view of the anti-theft lock head with a secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock head with a secondary locking structure, when in a locked state).
[0021] Figure 5 It is a cross-sectional view of the anti-theft lock head with a secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock head with a secondary locking structure, when the correct key is inserted into the unlocking state).
[0022] Figure 6 It is another cross-sectional view of the anti-theft lock head with a secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock head with a secondary locking structure, when the correct key is inserted into the unlocking state).
[0023] Figure 7 yes Figure 6 Schematic diagram of the structural state of twisting the key to unlock the lock in the state shown.
[0024] Figure 8It is a cross-sectional view of the anti-theft lock head with a secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock head with a secondary locking structure, and is in an idling state when a master key or other tool is used for abnormal unlocking). DETAILED DESCRIPTION
[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
[0026] As attached Figure 1 To Attachment Figure 3 As shown, an anti-theft lock head with a two-level locking structure includes a shell 1, a lock core 2, a main unlocking part 3 and a secondary unlocking part. In this embodiment, the anti-theft lock head also includes a toggle head 5. After the anti-theft lock head is installed on the lock body, the toggle head 5 is used to link the unlocking mechanism of the lock body.
[0027] According to the existing method, the lock core 2 is installed in the shell 1, and a plurality of blades 6 are arranged in parallel and perpendicular to the axial direction of the lock core 2 in the lock core 2. The edge of each blade 6 is respectively provided with a main groove 61 and an auxiliary groove 62, and the edge of each blade 6 is provided with one or more restricting grooves 63 on one side or both sides of its auxiliary groove 62; a reset spring 71 is provided in the lock core 2 corresponding to each blade 6, and the insertion of the key 100 can enable each blade 6 to overcome the action of the reset spring 71 and make each main groove 61 and auxiliary groove 62 into a straight line. When unlocking, the auxiliary and main unlocking parts 3 (3, 4) fall into the straight auxiliary groove 62 and main groove 61 formed by each blade 6 respectively.
[0028] The housing 1 is provided with a rotation groove 11, and the inner wall of the housing 1 is provided with a main groove 12 and an auxiliary groove 13 along the axial direction of the housing 1. More specifically, the projection of the auxiliary groove 13 on a cross section perpendicular to the central axis of the housing 1 is triangular or trapezoidal, and the base of the triangle or the lower base of the trapezoid is close to one side of the lock cylinder 2.
[0029] The auxiliary unlocking part includes an unlocking plate 41 and two auxiliary unlocking balls 42; both ends of the unlocking plate 41 are formed with abutting notches 411, the unlocking plate 41 is inserted into the lock core 2 and an auxiliary unlocking spring 72 is arranged between the lock core 2; two auxiliary grooves 13 are arranged on the inner wall of the outer shell 1 corresponding to the abutting notches 411; the two auxiliary unlocking balls 42 each fall on the abutting notches 411, and the unlocking plate 41 presses the two auxiliary unlocking balls 42 against the corresponding auxiliary grooves 13 under the action of the auxiliary unlocking spring 72, and when the lock core 2 rotates relative to the outer shell 1, the auxiliary groove 13 squeezes the auxiliary unlocking ball 42 to leave the auxiliary groove 13, and the unlocking plate 41 compresses the auxiliary unlocking spring 72 to fall into the auxiliary groove 62 or the restricting groove 63 of the blade 6.
[0030] A first key groove 21 and a second key groove 22 are formed on the peripheral wall of the lock core 2 corresponding to the main groove 12 and the auxiliary groove 13 .
[0031] The main unlocking member 3 has an inner latching key 31 and an outer latching key 32 .
[0032] The toggle head 5 is sleeved on the lock core 2 and placed in the rotation groove 11. The inner wall of the toggle head 5 is provided with a third key groove 51 corresponding to the first key groove 21. The outer key 32 is formed with a rib 321 extending along the length direction of the outer key 32. The rib 321 is accommodated in the third key groove 51. The thickness of the outer key 32 is equal to the depth of the main groove 12 and the depth of the main groove 12. The depth of the third key groove 51 is greater than the depth of the main groove 12. The thickness of the rib 321 is greater than the depth of the main groove 12 and less than or equal to the depth of the third key groove 51.
[0033] The outer card key 32 forms a stopper 322 on both sides of the convex rib 321, and the outer shell 1 is symmetrically provided with elastic devices 73 on both sides of the rotating groove 11. The elastic devices 73 act on the corresponding stopper 322 respectively. When unlocking, the outer card key 32 pushes the inner card key 31 into the main groove 61 of the same blade 6 under the action of the elastic device 73.
[0034] The housing 1 is symmetrically provided with two radial holes 14 extending radially and connected to the main groove 12. The elastic device 73 includes a main unlocking ball 731 and a main unlocking spring 732. The main unlocking spring 732 is arranged in the corresponding radial hole 14 and the main unlocking ball 731 is located between the main unlocking spring 732 and the corresponding abutting top 322.
[0035] In the locked state, if Figure 4 As shown, the outer key 32 is in the main groove 12 and the inner key 31 is in the first key groove 21, the auxiliary unlocking member is in the auxiliary groove 62 and the second key groove 22 at the same time, and the lock core 2 is connected to the housing 1; when unlocking, as shown in the attached Figure 5 To Attachment Figure 7 As shown, after the auxiliary unlocking piece is separated from the housing 1 and falls into the auxiliary groove 62 of the same blade 6, the outer card key 32 is separated from the housing 1 and pushes the inner card key 31 into the main groove 61; when the auxiliary unlocking piece is separated from the housing 1 and falls into any restraining groove 63 of a blade 6 and the outer card key 32 cannot be separated from the housing 1 and push the inner card key 31 into the main groove 61 of the same blade 6 (that is, when the master key 101 or other tools are used for abnormal unlocking), the outer card key 32 is retained in the main groove 12 and the inner card key 31 is completely in the first key groove 21, and the lock core 2 and the housing 1 can rotate relative to each other and are in an idling state, as shown in the attached Figure 8 shown.
[0036] The above embodiments are preferred implementations of the present invention, but the implementations of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.
Claims
1. An anti-theft lock head with a two-stage locking structure comprises a housing, a lock core, a main unlocking piece and a secondary unlocking piece; a main groove and a secondary groove are respectively arranged on the inner wall of the housing along the axial direction of the housing; The lock core is installed in the housing, and a plurality of blades are arranged in parallel and perpendicular to the axial direction of the lock core in the lock core. The peripheral wall of the lock core is provided with a first keyway and a second keyway corresponding to the main groove and the auxiliary groove; the edge of each blade is provided with a main groove and an auxiliary groove respectively, and the edge of each blade is provided with one or more restricting grooves on one side or both sides of its auxiliary groove; the characteristics are as follows: The main unlocking piece has an inner card key and an outer card key; in the locked state, the outer card key is in the main groove and the inner card key is in the first key groove, the auxiliary unlocking piece is in the auxiliary groove and the second key groove at the same time, and the lock core is connected to the shell; when unlocking, the auxiliary unlocking piece first separates from the shell and falls into the auxiliary groove of the same blade, and then the outer card key separates from the shell and pushes the inner card key into the main groove; when the auxiliary unlocking piece separates from the shell and falls into any restraining groove of a blade and the outer card key cannot separate from the shell and push the inner card key into the main groove of the same blade, the outer card key is stuck The inner card key is completely in the main groove and falls into the first key groove, the lock core and the shell can rotate relative to each other and be in an idling state, the projection of the auxiliary groove on a cross section perpendicular to the central axis of the shell is triangular or trapezoidal, the base of the triangle or the lower base of the trapezoid is close to one side of the lock core, the auxiliary unlocking piece includes an unlocking plate body and two auxiliary unlocking balls; the two ends of the unlocking plate body are formed with abutting notches, the unlocking plate body is inserted into the lock core and an auxiliary unlocking spring is arranged between the lock core; two auxiliary grooves are arranged on the inner wall of the shell corresponding to the abutting notches; The two auxiliary unlocking balls each fall on the abutting notch, and the unlocking plate body, under the action of the auxiliary unlocking spring, presses the two auxiliary unlocking balls against the corresponding auxiliary grooves. When the lock core rotates relative to the outer shell, the auxiliary groove squeezes the auxiliary unlocking ball to leave the auxiliary groove, and the unlocking plate body compresses the auxiliary unlocking spring to fall into the auxiliary groove or restricting groove of the blade.
2. The anti-theft lock with a two-stage locking structure according to claim 1, characterized in that: A return spring is arranged in the lock core corresponding to each blade. The insertion of the key can make each blade overcome the action of the return spring and make each main groove and auxiliary groove into a straight line. When unlocking, the auxiliary and main unlocking parts fall into the straight auxiliary groove and main groove formed by each blade respectively.
3. The anti-theft lock with a two-stage locking structure according to claim 1, characterized in that: The outer shell is provided with a rotation groove, and a toggle head cover is arranged on the lock core and placed in the rotation groove. The inner wall of the toggle head is provided with a third key groove corresponding to the first key groove, and the outer key is formed with a convex rib extending along the length direction of the outer key, and the convex rib is accommodated in the third key groove.
4. The anti-theft lock with a two-stage locking structure according to claim 2, characterized in that: The thickness of the external key is equal to the depth of the main groove and the depth of the main groove, the depth of the third key groove is greater than the depth of the main groove, and the thickness of the rib is greater than the depth of the main groove but less than or equal to the depth of the third key groove.
5. The anti-theft lock with a two-stage locking structure according to claim 3, characterized in that: The outer card key forms abutment tops on both sides of the convex rib, and the outer shell is symmetrically provided with elastic devices on both sides of the rotating groove. The elastic devices act on the corresponding abutment tops respectively. When unlocking, the outer card key pushes the inner card key into the main groove of the same blade under the action of the elastic device.
6. The anti-theft lock with a two-stage locking structure according to claim 4, characterized in that: The shell is symmetrically provided with two radial holes extending radially and connected to the main groove. The elastic device includes a main unlocking ball and a main unlocking spring. The main unlocking spring is arranged in the corresponding radial hole and the main unlocking ball is located between the main unlocking spring and the corresponding abutting top.