CN111305652A - Anti-theft lock head with secondary locking structure - Google Patents

Abstract

The invention relates to a lock head of an anti-theft lock with a secondary locking structure, which comprises a shell, a lock core, a main unlocking piece and an auxiliary unlocking piece; the inner wall of the shell is provided with a main groove and an auxiliary groove; a plurality of blades are arranged in the lock cylinder, and the lock cylinder is provided with a first key groove and a second key groove; each blade is provided with a main groove, an auxiliary groove and a restriction groove; the main unlocking piece is provided with an inner clamping key and an outer clamping key; in a locking state, the outer clamping key is positioned in the main groove, the inner clamping key is positioned in the first key groove, the auxiliary unlocking piece is positioned in the auxiliary groove and the second key groove at the same time, and the lock cylinder is connected with the shell; when the lock is unlocked, the auxiliary unlocking piece is separated from the shell and falls into the auxiliary groove, and then the inner clamping key is pushed into the main groove; when the master key or other tools are used for abnormal unlocking, the outer clamping key is retained in the main groove, the inner clamping key completely falls into the first key groove, and the lock cylinder and the shell can rotate relatively to form an idling state. The invention has the advantages of idle running function, stronger anti-theft performance and suitability for small volume.

Description

Anti-theft lock head with secondary locking structure

technical field

The present invention relates to an anti-theft lock head with a secondary locking structure.

Background technique

In the patent document with the Chinese Patent Authorization Announcement No. CN102535972B and the title of the invention is an anti-theft lock head with a secondary locking structure, an anti-theft lock head structure is disclosed. Refer to the various drawings of the patent document, especially the accompanying drawings. As shown in Figures 2(a), 2(b) and 5, each blade is provided with a main groove 16 and an auxiliary groove 17, and there are several restricting grooves 23 on both sides of the auxiliary groove 17. When unlocking, 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 cylinder 2 can be linked with each blade 11. When using a master key or other tools for abnormal unlocking, due to Each blade is provided with a plurality of restricting grooves 23, so the auxiliary unlocking key 5 can easily enter one of the restricting grooves 23, but the main unlocking key 4 cannot smoothly enter its corresponding main groove 16 during the rotation of the lock cylinder 2. As a result, the lock cylinder 2 is stuck and cannot be rotated to achieve the purpose of anti-theft.

Although the above structure can achieve the purpose of anti-theft, it cannot be adapted to a small-volume lock head and does not have the function of idling.

Therefore, it is necessary to improve the existing anti-theft lock head structure.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an anti-theft lock head with idling function, enhanced anti-theft performance, and suitable for small-volume secondary locking structure.

To achieve the above object, the present invention adopts the following technical solutions:

An anti-theft lock head with a secondary locking structure includes a casing, a lock cylinder, a main unlocking piece and an auxiliary unlocking piece; a main groove and an auxiliary groove are respectively provided on the inner wall of the casing along the axial direction of the casing; the lock cylinder is installed in the casing , a number of blades are arranged in parallel in the lock cylinder perpendicular to the axial direction of the lock cylinder, and the peripheral wall of the lock cylinder is provided with a first key groove and a second key groove corresponding to the main groove and the auxiliary groove; the edges of each blade are respectively provided with main grooves Slots and auxiliary grooves, the edge of each blade is provided with one or more restricting grooves on one or both sides of the auxiliary groove; 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 The main groove and the inner card are located in the first keyway, the auxiliary unlocking member is in the auxiliary groove and the second keyway at the same time, and the lock cylinder is connected with the outer casing; when unlocking, the auxiliary unlocking member first breaks away from the outer casing and falls into the auxiliary opening of the same blade. After entering the groove, the outer card key is detached from the casing and the inner card key is pushed into the main groove; when the auxiliary unlocking piece is separated from the casing and falls into any restriction groove of a blade, the outer card key cannot be separated from the casing and the inner card key is pushed into the main groove. When in the main groove of the same blade, the outer key stays in the main groove and the inner key completely falls in the first key groove, and the lock cylinder and the shell can rotate relative to each other and are in an idling state.

The advantages of the invention are: it has the function of idling, stronger anti-theft performance, and is suitable for small volume.

The present invention can be improved through the following scheme:

There is a reset spring corresponding to each blade in the lock cylinder. The insertion of the key can make each blade overcome the action of the reset spring and make the main groove and the auxiliary groove into a straight line. When unlocking, the auxiliary and main unlocking pieces fall into the In the linear auxiliary groove and the main groove formed by each blade.

The projection of the auxiliary groove on a section perpendicular to the central axis of the casing is a triangle or a trapezoid, and the bottom edge of the triangle or the lower bottom of the trapezoid is close to one side of the lock cylinder.

The auxiliary unlocking piece includes an unlocking piece body and two auxiliary unlocking spheres; the two ends of the unlocking piece body are formed with abutting notches, the unlocking piece body is inserted on the lock cylinder, and an auxiliary unlocking spring is arranged between the lock core and the outer shell; The inner wall is provided with two auxiliary grooves corresponding to the abutting gap; the two auxiliary unlocking spheres each fall on the abutting gap, and the unlocking piece is pressed against the two auxiliary unlocking spheres under the action of the auxiliary unlocking spring. In the auxiliary groove, when the lock cylinder rotates relative to the casing, the auxiliary groove squeezes the auxiliary unlocking sphere to leave the auxiliary groove, and the unlocking piece compresses the auxiliary unlocking spring and falls into the auxiliary groove or restriction groove of the blade.

The shell is provided with a rotating groove, a toggle head is sleeved on the lock cylinder and placed in the rotating groove, the inner wall of the toggle head is provided with a third key slot corresponding to the first key slot, and the outer card key is formed along the outer card key. A protruding rib extending in the length direction, the protruding rib is accommodated in the third keyway.

The thickness of the outer 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 convex rib is greater than the depth of the main groove and less than or equal to the depth of the third key groove.

The outer card key forms abutting tops on both sides of the protruding rib. The outer shell is symmetrically provided with elastic devices on both sides of the rotating groove. The elastic devices act on the corresponding abutting tops. When pushing the inner card into the main groove of the same blade.

The casing is symmetrically provided with two radial holes extending along the radial direction and communicating with 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 in the main unlocking position. between the spring and the corresponding abutment.

Description of drawings

FIG. 1 is a three-dimensional state schematic diagram of the overall structure of an anti-theft lock head with a secondary locking structure in an embodiment.

FIG. 2 is a longitudinal sectional view of the anti-theft lock cylinder with the secondary locking structure in the embodiment (through the axial direction of the anti-theft lock cylinder with the secondary locking structure, when the key is inserted to lock).

FIG. 3 is an exploded three-dimensional state schematic diagram of the anti-theft lock head with the secondary locking structure in the embodiment.

4 is a cross-sectional view of the anti-theft lock cylinder with the secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock cylinder with the secondary locking structure, in the locked state).

5 is a cross-sectional view of the anti-theft lock cylinder with the secondary locking structure in the embodiment (the section is perpendicular to the axial direction of the anti-theft lock cylinder with the secondary locking structure, when the correct key is inserted into the unlocked state).

6 is another cross-sectional view of the anti-theft lock cylinder with the secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock cylinder with the secondary locking structure, when the correct key is inserted into the unlocked state).

FIG. 7 is a schematic view of the structure state shown in FIG. 6 by twisting the key to unlock.

Fig. 8 is a sectional view of the anti-theft lock cylinder with the secondary locking structure in the embodiment (the cross section is perpendicular to the axial direction of the anti-theft lock cylinder with the secondary locking structure, when a master key or other tools are used for abnormal unlocking with idling state).

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments

As shown in Figures 1 to 3, an anti-theft lock head with a secondary locking structure includes a casing 1, a lock cylinder 2, a main unlocking member 3 and a secondary unlocking member 4. In this embodiment, the anti-theft lock The 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 interlock the unlocking mechanism of the lock body.

According to the existing method, the lock cylinder 2 is installed in the casing 1, and a plurality of blades 6 are arranged in parallel with the axial direction of the lock cylinder 2 in the lock cylinder 2, and the edges of each blade 6 are respectively provided with a main groove 61 and an auxiliary groove. In the groove 62, the edge of each blade 6 is provided with one or more restricting grooves 63 on one or both sides of its auxiliary groove 62; the lock cylinder 2 is provided with a return spring 71 corresponding to each blade 6, and the insertion of the key 100 can The main grooves 61 and the auxiliary grooves 62 are formed by making each blade 6 overcome the action of the return spring 71 to form a straight line. In the linear auxiliary groove 62 and the main groove 61 .

The casing 1 is provided with a rotating groove 11 , and a main groove 12 and an auxiliary groove 13 are respectively provided on the inner wall of the casing 1 along the axial direction of the casing 1 . More specifically, the projection of the auxiliary groove 13 on a section perpendicular to the central axis of the casing 1 is 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 cylinder 2 .

The auxiliary unlocking member 4 includes an unlocking piece 41 and two auxiliary unlocking spheres 42; the two ends of the unlocking piece 41 are formed with abutting notches 411, and the unlocking piece 41 is inserted on the lock cylinder 2 and is connected with the lock cylinder 2. A pair of auxiliary unlocking springs 72 are arranged between them; two auxiliary grooves 13 are provided on the inner wall of the housing 1 corresponding to the abutting notches 411; Under the action of 72, the two auxiliary unlocking balls 42 are pressed against the corresponding auxiliary grooves 13. When the lock cylinder 2 rotates relative to the casing 1, the auxiliary grooves 13 squeeze the auxiliary unlocking balls 42 to leave the auxiliary grooves. 13. The unlocking piece 41 compresses the auxiliary unlocking spring 72 and falls into the auxiliary groove 62 or the restricting groove 63 of the blade 6 .

A first key groove 21 and a second key groove 22 are defined on the peripheral wall of the lock cylinder 2 corresponding to the main groove 12 and the auxiliary groove 13 .

The main unlocking member 3 has an inner card key 31 and an outer card key 32 .

The toggle head 5 is sleeved on the lock cylinder 2 and placed in the rotation groove 11. The inner wall of the toggle head 5 is provided with a third key slot 51 corresponding to the first key slot 21. The outer key 32 has a rib 321 extending in the length direction, and 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 , and the thickness of the protruding ribs 321 is greater than the depth of the main groove 12 . Less than or equal to the depth of the third keyway 51 .

The outer key 32 forms abutting tops 322 on both sides of the protruding rib 321. The housing 1 is symmetrically provided with elastic devices 73 on both sides of the rotating groove 11. The elastic devices 73 act on the corresponding abutting tops 322. When the outer key 32 pushes the inner key 31 into the main groove 61 of the same blade 6 under the action of the elastic device 73 .

The housing 1 is symmetrically provided with two radial holes 14 extending along the radial direction and communicating with the main groove 12. The elastic device 73 includes a main unlocking ball 731 and a main unlocking spring 732, and the main unlocking spring 732 is arranged in the corresponding radial direction. The main unlocking ball 731 is located between the main unlocking spring 732 and the corresponding abutting top 322 in the hole 14 .

In the locked state, as shown in FIG. 4 , the outer key 32 is in the main groove 12 and the inner key 31 is in the first key groove 21 , and the auxiliary unlocking member 4 is in the auxiliary groove 62 and the second key groove 22 at the same time. The core 2 is connected with the casing 1; when unlocking, as shown in Figures 5 to 7, the auxiliary unlocking member 4 first leaves the casing 1 and falls into the auxiliary groove 62 of the same blade 6, and the outer card key 32 is separated from the casing. 1. Push the inner card key 31 into the main groove 61; when the auxiliary unlocking member 4 is separated from the casing 1 and falls into any restriction groove 63 of a blade 6, the outer card key 32 cannot be separated from the casing 1. Push the inner card key 31 into When the same blade 6 is in the main groove 61 (that is, when the master key 101 or other tools are used for abnormal unlocking), the outer key 32 stays in the main groove 12 and the inner key 31 completely falls in the first key groove 21 , the lock cylinder 2 and the casing 1 can rotate relative to each other and are in an idling state, as shown in FIG. 8 .

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent to The replacement modes are all included in the protection scope of the present invention.

Claims (8)

1. The anti-theft lock head with a secondary locking structure includes a casing, a lock cylinder, a main unlocking piece and a secondary unlocking piece; the main groove and the auxiliary groove are respectively set on the inner wall of the casing along the axial direction of the casing; the lock cylinder is installed in the In the casing, a number of blades are arranged in parallel in the lock cylinder perpendicular to the axial direction of the lock cylinder, and the peripheral wall of the lock cylinder is provided with a first keyway and a second keyway corresponding to the main groove and the auxiliary groove; the edges of each blade are respectively provided with The main groove and the auxiliary groove, the edge of each blade is provided with one or more restricting grooves on one side or both sides of the auxiliary groove; it is characterized in that the main unlocking part has an inner card key and an outer card key; the locked state The outer key is in the main groove and the inner key is in the first keyway, the auxiliary unlocking member is in the auxiliary groove and the second keyway at the same time, and the lock cylinder is connected with the outer casing; when unlocking, the auxiliary unlocking member first breaks away from the outer casing and falls. After entering into the auxiliary groove of the same blade, the outer card key is separated from the casing and the inner card is pushed into the main groove; when the auxiliary unlocking piece is separated from the casing and falls into any restriction groove of a blade, the outer card key cannot be separated from the casing. When the inner key is pushed into the main groove of the same blade, the outer key stays in the main groove and the inner key completely falls into the first key groove, and the lock cylinder and the outer shell can rotate relative to each other and are in an idling state. 2. The anti-theft lock head with a secondary locking structure according to claim 1, characterized in that, a return spring is provided in the lock cylinder corresponding to each blade, and the insertion of the key can make each blade overcome the action of the return spring to make the blade. The main grooves and the auxiliary grooves are respectively linear, and when unlocking, the auxiliary and main unlocking pieces fall into the linear auxiliary grooves and the main grooves formed by the blades respectively. 3. The anti-theft lock head with a secondary locking structure according to claim 1, wherein the projection of the auxiliary groove on a section perpendicular to the central axis of the casing is a triangle or a trapezoid, and the bottom edge of the triangle is in the shape of a triangle or a trapezoid. Or the lower bottom of the trapezoid is close to the side of the lock cylinder. 4 . The anti-theft lock head with a secondary locking structure according to claim 3 , wherein the auxiliary unlocking member comprises an unlocking piece and two auxiliary unlocking spheres; the two ends of the unlocking piece are formed with abutting A gap, the unlocking piece is inserted on the lock cylinder and an auxiliary unlocking spring is arranged between the lock cylinder; two auxiliary grooves are set on the inner wall of the casing corresponding to the abutting gap; the two auxiliary unlocking spheres fall into the abutting gap respectively On the other hand, under the action of the auxiliary unlocking spring, the unlocking piece abuts the two auxiliary unlocking spheres against the corresponding auxiliary grooves. When the lock cylinder rotates relative to the casing, the auxiliary grooves squeeze the auxiliary unlocking spheres to leave the auxiliary unlocking spheres. Groove, the unlocking plate body compresses the auxiliary unlocking spring and falls into the auxiliary groove or restricting groove of the blade. 5. The anti-theft lock head with a secondary locking structure according to any one of claims 1 to 4, wherein the housing is provided with a rotating groove, and a toggle head is sleeved on the lock cylinder and placed in In the rotation groove, the inner wall of the toggle head is provided with a third key groove corresponding to the first key groove, 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. 6 . The anti-theft lock head with a secondary locking structure according to claim 5 , wherein the thickness of the outer card key is equal to the depth of the main groove and the depth of the main groove, and the depth of the third keyway is greater than the depth of the main groove. 7 . As for the depth of the main groove, the thickness of the protruding rib is greater than the depth of the main groove and less than or equal to the depth of the third key groove. 7 . The anti-theft lock head with a secondary locking structure according to claim 5 , wherein the outer card key forms abutting tops on both sides of the protruding rib, and the casing is symmetrically provided with elastic devices on both sides of the rotating groove. 8 . , the elastic devices act on the corresponding abutting tops, and 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. 8 . The anti-theft lock head with a secondary locking structure according to claim 7 , wherein the housing is symmetrically provided with two radial holes extending along the radial direction and communicating with the main groove, and the elastic device comprises: 9 . The main unlocking ball and the 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.

Images