CN210598474U - Floating bead anti-theft lock and key matched with same - Google Patents
Floating bead anti-theft lock and key matched with same Download PDFInfo
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- CN210598474U CN210598474U CN201920266023.5U CN201920266023U CN210598474U CN 210598474 U CN210598474 U CN 210598474U CN 201920266023 U CN201920266023 U CN 201920266023U CN 210598474 U CN210598474 U CN 210598474U
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Abstract
The utility model relates to a floating bead anti-theft lock and a key matched with the same, which comprises a lock shell, a lock liner and a key body, wherein the lock shell is provided with an axially arranged mounting hole, the lock liner is rotationally arranged in the mounting hole, the lock liner is provided with a key hole which is axially arranged and is matched with the key body, and when the lock is in a locking state, the part of a flat bead is clamped in a second special-shaped bead hole; when the lock is in an unlocking state, after the floating bead is jacked up by the positioning jacking bead, the floating bead jacks up the first special-shaped part, and the second special-shaped part jacks up the flat bead to enable the top end of the second special-shaped part to be flush with the circumferential surface of the lock cylinder, so that unlocking is realized.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of locks, in particular to a floating bead anti-theft lock and a key matched with the same.
[ background of the invention ]
The anti-theft marble lock cylinder which is popular in the market is a track groove and double-row ball structure, and is opened by a special unlocking tool vibration gun. And most lock cores can be unlocked by technical unlocking methods such as picking and dialing. In order to solve the problem of illegal technology starting, the picking prevention function is further added, and the prior art needs to be further improved. For example, the Chinese patent publication No. CN104314374A, named as a lock core and an adaptive key, adopts the technical scheme that: the pin tumbler locking mechanism also comprises at least one special-shaped primary and secondary ball component which is arranged in the lock shell and the lock cylinder and axially corresponds to the double-row ball component and extends along the radial direction of the lock shell and the lock cylinder and a ball ejecting component which is arranged in the lock cylinder, the special-shaped primary and secondary ball component comprises a special-shaped primary upper ball and a special-shaped primary lower ball which can move along the radial direction, one side of the special-shaped primary upper ball is provided with a secondary upper ball which can move along the radial direction, a position, corresponding to the primary upper ball, in the special-shaped primary lower ball is provided with a secondary lower ball which can move along the radial direction, the lower end surface of the special-shaped primary lower ball is flush with or retracts into the wall of the key hole, the special-shaped primary upper ball is abutted against the special-shaped primary lower ball, the secondary upper ball is abutted against the secondary lower ball, the ball ejecting component is arranged at the position, corresponding to the other side of the lock cylinder, opposite to the lock cylinder, of the key, the ball ejecting assembly is internally provided with an ejecting ball which can move along the radial direction, during locking, the upper ball of the double-row ball spring assembly is clamped on a first interface between the lock shell and the lock liner, the lower ball extends into the key hole, the upper ball of the special-shaped nut is clamped on a second interface between the lock shell and the lock liner, the lower ball of the sub-ball extends into the key hole, during unlocking, the lower ball of the double-row ball spring assembly is matched with a first tooth number of a key in a working mode, the lower ball of the special-shaped nut is matched with a second tooth number of the key in a working mode, the ejecting ball ejects a floating ball on the key, and the floating ball ejects the lower ball of the special-shaped nut to achieve unlocking. Although the technical scheme can prevent illegal unlocking by means of selecting, poking or vibrating guns and the like, the following defects still exist:
1. the upper bead hole of the special-shaped nut and the lower bead hole of the special-shaped nut are the same in width, and the upper bead of the special-shaped nut, the lower bead of the special-shaped nut and the upper bead of the son and the lower bead of the son are in the vertical position relation, so that the special-shaped nut and the lower bead of the special-shaped nut are convenient to pick up, and the lawless persons can jack up the lower bead of the special-shaped nut and the lower bead of the son simultaneously by using a tool to enable the lower bead of the special-shaped nut and the lower bead of the son to exit;
2. the special-shaped female upper bead is provided with the sub upper bead on one side, and the special-shaped female lower bead is provided with the sub lower bead on one side, so that the structure is complex, the processing and assembling difficulty is high, the production cost is high, the sizes of the special-shaped female upper bead and the special-shaped female lower bead are increased, the hole diameters of the special-shaped female upper bead hole and the special-shaped female lower bead hole are increased along with the increase of the hole diameters, and the larger the hole diameters are, the higher the probability of mechanical failure is;
3. the floating beads need to be fixed in the step-shaped floating bead holes through the pressing covers, the bosses are arranged in the middle of the floating beads, the structure is complex, the pressing covers are easy to lose effectiveness and separate from keys after long-term use, the floating beads fall out, and the service life is short; after the floating ball falls out, the lock can not be matched, and the lock core needs to be replaced.
[ summary of the invention ]
In order to solve the problems, the invention provides the floating bead anti-theft lock and the matched key thereof, which have stable performance, high safety and long service life.
In order to achieve the purpose, the invention provides the following technical scheme:
a floating bead anti-theft lock comprises a lock shell 1, a lock liner 2 and a key body 3 matched with the lock liner 2, wherein the lock shell 1 is provided with an axially arranged mounting hole 11, the lock liner 2 is rotatably arranged in the mounting hole 11, the lock liner 2 is provided with an axially arranged key hole 21 matched with the key body 3, a flat bead hole 12 communicated with the mounting hole 11 is radially arranged in the lock shell 1, a positioning top bead hole 22 and a first special-shaped bead hole 23 which are positioned at two sides of the key hole 21 and communicated with the key hole are radially arranged in the lock liner 2, a second special-shaped bead hole 24 which is not positioned on the same axis as the first special-shaped bead hole 23 but is radially communicated with the first special-shaped bead hole 23 is also radially arranged in the lock liner 2, the first special-shaped bead hole 23 and the second special-shaped bead hole 24 form a special-shaped cavity 25, and the width of the connection part between the first special-shaped bead hole 23 and the second special-shaped bead hole 24 is smaller than the aperture of the first special-shaped bead hole 23 and the second special-shaped bead hole 24, the first special-shaped bead hole 23 and the positioning top bead hole 22 are coaxial, and when the anti-theft lock is in a locked state, the second special-shaped bead hole 24 and the flat bead hole 12 are coaxial; a flat ball 41 and a first spring 42 are sequentially arranged in the flat ball hole 12 from outside to inside, a positioning top ball 43 and a second spring 44 are sequentially arranged in the positioning top ball hole 22 from outside to inside, a special-shaped ball 45 matched with the special-shaped cavity 25 is arranged in the special-shaped cavity 25, the special-shaped ball 45 is provided with a first special-shaped part 451 positioned in the first special-shaped ball hole 23 and a second special-shaped part 452 positioned in the second special-shaped ball hole 24, the key body 3 is provided with a floating ball hole 31, a floating ball 32 capable of axially moving relative to the floating ball hole 31 is arranged in the floating ball hole 31, and the depth of the floating ball hole 31 is larger than the diameter of the floating ball 32; the upper end and the lower end of the floating bead hole 31 are respectively protruded inwards to form an upper annular clamping edge 35 and a lower annular clamping edge 36 which are used for clamping the floating bead 32 in the floating bead hole, and when the anti-theft lock is in a locked state, part of the flat bead 41 is clamped in the second special-shaped bead hole 24; when the anti-theft lock is in an unlocking state, after the floating bead 32 is jacked up by the positioning jacking bead 43, the floating bead jacks up the first special-shaped part 451, and the second special-shaped part 452 jacks up the flat bead 41, so that the top end of the second special-shaped part 452 is flush with the peripheral surface of the lock cylinder 2, and the unlocking is realized.
As a preferred approach, further defined as: the lower end surface of the first special-shaped part 451 is lower than the lower end surface of the second special-shaped part 452, so that a lower step 453 is formed on the special-shaped bead 45, a counter-sunk table 90 matched with the lower step 453 is arranged in the special-shaped cavity 25, and when the anti-theft lock is in a locking state, the lower step 453 abuts against the counter-sunk table 90.
As a preferred approach, further defined as: the maximum width of the upper end opening of the special-shaped cavity 25 along the radial direction of the lock cylinder 2 is larger than the diameter of the flat bead hole 12.
As a preferred approach, further defined as: the diameter of the first profile 451 is smaller than the diameter of the second profile 452, and the width of the connection between the first profile 451 and the second profile 452 is smaller than the diameter of the first profile 451 and the second profile 452.
As a preferred approach, further defined as: the center of gravity of the shaped bead 45 is located on the second shaped part 452
As a preferred approach, further defined as: the elastic force of the second spring 44 is greater than that of the first spring 42.
As a preferred approach, further defined as: the end surface of the flat bead 41, which is opposite to the special-shaped bead 45, is an arc surface.
As a preferred approach, further defined as: the lower end of the positioning top ball 43 is convexly provided with an annular boss 431, the upper end of the positioning top ball hole 22 is convexly provided with an annular flange 221 matched with the annular boss 431, and when the anti-theft lock is in a locking state, the second spring 44 jacks up the positioning top ball 43 to enable the annular boss 431 to abut against the annular flange 221.
As a preferred approach, further defined as: a sealing bead 46 which is not exposed out of the lock cylinder 2 is further arranged in the positioning top bead hole 22, and one end of the second spring 44 acts on the sealing bead 46.
A floating ball key comprises a key body 3, wherein the key body 3 is provided with a holding part and an unlocking part, the unlocking part is provided with a floating ball hole 31, a floating ball 32 capable of moving relative to the floating ball hole 31 in the axial direction is arranged in the floating ball hole 31, and the depth of the floating ball hole 31 is larger than the diameter of the floating ball 32; the upper end and the lower end of the floating bead hole 31 are respectively and inwardly protruded to form an upper annular clamping edge 35 and a lower annular clamping edge 36 which are used for clamping the floating bead 32 in the floating bead hole.
The beneficial effects of the invention are as follows:
1. the special-shaped bead matched with the special-shaped cavity is arranged in the special-shaped cavity, the diameter of the first special-shaped part on the special-shaped bead is smaller than that of the second special-shaped part, so that the gravity center formed by the special-shaped bead is positioned on the second special-shaped part, when a lawbreaker selects the first special-shaped part by an abnormal means, the special-shaped bead cannot move vertically and can move obliquely upwards, and the second special-shaped part can abut against the inner wall of the second special-shaped hole, so that the special-shaped bead is limited to move upwards, and the safety performance created by the special-shaped bead is greatly enhanced.
2. The special-shaped ball lock is further improved, the maximum width of the opening at the upper end of the special-shaped cavity along the radial direction of the lock cylinder is larger than the diameter of the flat ball hole, so that the lock shell can clamp the special-shaped ball to prevent the special-shaped ball from separating out of the special-shaped cavity, the mechanical failure is reduced, and the service life of the special-shaped ball lock is prolonged.
3. The technical scheme is further improved, and the floating bead key is characterized in that the floating beads on the key are embedded into the floating bead holes, and an upper annular clamping edge and a lower annular clamping edge are clamped to prevent the floating beads from being separated and falling out, so that the mechanical effectiveness is guaranteed, and the service life is further guaranteed.
[ description of the drawings ]
FIG. 1 is a structural diagram of the invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a front view of the invention;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 5 is a cross-sectional view taken at A-A of FIG. 3 after the key body has been removed;
FIG. 6 is a structural view of the key body;
FIG. 7 is an enlarged view at B of FIG. 6;
FIG. 8 is a front view of the key body;
FIG. 9 is a cross-sectional view at C-C of FIG. 8;
FIG. 10 is one of the structural illustrations of shaped beads;
FIG. 11 is a second view of the structure of the shaped bead.
[ detailed description ] embodiments
The invention is described in further detail below with reference to the following figures and detailed description:
as shown in fig. 1-11, a floating bead anti-theft lock includes a lock case 1, a lock core 2 and a key body 3 adapted to the lock core 2, the lock case 1 has an axially disposed mounting hole 11, the lock core 2 is rotatably disposed in the mounting hole 11, the lock core 2 has an axially disposed key hole 21 adapted to the key body 3, and is characterized in that a flat bead hole 12 communicated with the mounting hole 11 is radially disposed in the lock case 1, a positioning top bead hole 22 and a first special-shaped bead hole 23 are radially disposed in the lock core 2 and are located at two sides of the key hole 21 and communicated with the key hole, a second special-shaped bead hole 24 is radially disposed in the lock core 2 and is not coaxially with the first special-shaped bead hole 23 but radially communicated with the first special-shaped bead hole 24, the first special-shaped bead hole 23 and the second special-shaped bead hole 24 form a special-shaped cavity 25, and the width of the connection between the first special-shaped bead hole 23 and the second special-shaped bead hole 24 is smaller than that of the first special-shaped bead hole 23 and the first special-shaped bead hole 24 The diameters of the bead hole 23 and the second special-shaped bead hole 24, the first special-shaped bead hole 23 and the positioning top bead hole 22 are coaxial, and when the anti-theft lock is in a locked state, the second special-shaped bead hole 24 and the flat bead hole 12 are coaxial; a flat ball 41 and a first spring 42 are sequentially arranged in the flat ball hole 12 from outside to inside, a positioning top ball 43 and a second spring 44 are sequentially arranged in the positioning top ball hole 22 from outside to inside, a special-shaped ball 45 matched with the special-shaped cavity 25 is arranged in the special-shaped cavity 25, the special-shaped ball 45 is provided with a first special-shaped part 451 positioned in the first special-shaped ball hole 23 and a second special-shaped part 452 positioned in the second special-shaped ball hole 24, the key body 3 is provided with a floating ball hole 31, a floating ball 32 capable of axially moving relative to the floating ball hole 31 is arranged in the floating ball hole 31, and the depth of the floating ball hole 31 is larger than the diameter of the floating ball 32; the upper end and the lower end of the floating bead hole 31 are respectively protruded inwards to form an upper annular clamping edge 35 and a lower annular clamping edge 36 which are used for clamping the floating bead 32 in the floating bead hole, and when the anti-theft lock is in a locked state, part of the flat bead 41 is clamped in the second special-shaped bead hole 24; when the anti-theft lock is in an unlocking state, after the floating bead 32 is jacked up by the positioning jacking bead 43, the floating bead jacks up the first special-shaped part 451, and the second special-shaped part 452 jacks up the flat bead 41, so that the top end of the second special-shaped part 452 is flush with the peripheral surface of the lock cylinder 2, and the unlocking is realized. The working principle is as follows: when the key body 3 is inserted into the key hole 21, the floating ball hole 31 is just aligned with the first special-shaped ball hole 23 and the positioning top ball hole 22, because the elastic force of the second spring 44 is greater than the elastic force of the first spring 42, the second spring 44 acts on the positioning top ball 43 to jack the floating ball 32, the first special-shaped part 451 of the special-shaped ball 45 is jacked up in the moving process of the floating ball 32, so that the second special-shaped part 452 jacks up the flat ball to realize unlocking, when the key body 3 is pulled out, the first spring 42 acts on the flat ball to jack the second special-shaped part 452, so that the flat ball 41 is partially clamped into the second special-shaped ball hole 24 to realize locking, and compared with the prior art, the key is simple in structure, stable in performance and long in service life.
In this embodiment, in order to make the shaped bead 45 not fall out of the shaped cavity 25 in the closed state, the lower end surface of the first shaped portion 451 is lower than the lower end surface of the second shaped portion 452, so that the shaped bead 45 is formed with a lower step 453, a sunken platform 90 matched with the lower step 453 is arranged in the shaped cavity (25), the lower step 453 abuts against the sunken platform 90 in the closed state of the anti-theft lock, the upper end surface of the first shaped portion 451 is lower than the upper end surface of the second shaped portion 452, so that the upper part of the shaped bead 45 forms an upper step 454, when the shaped bead 45 is picked up, the maximum width of the upper opening of the shaped cavity 25 along the radial direction of the lock cylinder 2 is larger than the diameter of the flat bead hole 12, so that the shaped bead 45 does not fall out of the shaped cavity, thereby ensuring the mechanical effectiveness, meanwhile, the safety performance of the anti-theft lock is better enhanced.
In this embodiment, for better adaptation of the shaped bead to the shaped cavity, the diameter of the first shaped portion 451 is smaller than the diameter of the second shaped portion 452, and the width of the connection between the first shaped portion 451 and the second shaped portion 452 is smaller than the diameter of the first shaped portion 451 and the second shaped portion 452. The first and second profiles 451, 452 can be integrally formed, and the shaped bead 45 has a simple structure, is easy to process and assemble, compared to the prior art. Moreover, the diameter of the first special-shaped part 451 is smaller than that of the second special-shaped part 452, the gravity center of the special-shaped bead 45 is positioned on the second special-shaped part 452, when a lawbreaker uses an abnormal means to pick up the lower end of the first special-shaped part 451, the special-shaped bead 45 cannot move vertically and can move obliquely upwards, so that the second special-shaped part 452 can abut against the inner wall of the second special-shaped hole 24, the special-shaped bead 45 is limited to move upwards continuously, and the safety performance of the product is greatly enhanced.
In this embodiment, the end surface of the flat bead 41 that faces the shaped bead 45 is a curved surface. Compare in prior art, thereby set up the terminal surface of flat pearl 41 into the cambered surface and more do benefit to lock courage 2 smooth and easy rotation in mounting hole 11 and prevent the card shell phenomenon of lock courage 2.
In this embodiment, in order to position the ball 43 to lift the floating ball 32 without departing from the positioning ball hole 22, the lower end of the positioning ball 43 is formed with an annular boss 431, the upper end of the positioning ball hole 22 is formed with an annular flange 221 matching with the annular boss 431 in an inward protruding manner, and when the anti-theft lock is in a locked state, the second spring 44 lifts the positioning ball 43 to make the annular boss 431 abut against the annular flange 221.
In the embodiment, the installation and the work of the second spring 44 are facilitated, a sealing bead 46 which is not exposed outside the lock cylinder 2 is further arranged in the positioning top bead hole 22, and one end of the second spring 44 acts on the sealing bead 46.
A floating ball key comprises a key body 3, wherein the key body 3 is provided with a holding part and an unlocking part, the unlocking part is provided with a floating ball hole 31, a floating ball 32 capable of moving relative to the floating ball hole 31 in the axial direction is arranged in the floating ball hole 31, and the depth of the floating ball hole 31 is larger than the diameter of the floating ball 32; the upper end and the lower end of the floating bead hole 31 are respectively and inwardly protruded to form an upper annular clamping edge 35 and a lower annular clamping edge 36 which are used for clamping the floating bead 32 in the floating bead hole. Compared with the prior art, the device has the advantages of simple structure, good stability and long service life.
Claims (10)
1. A floating bead anti-theft lock comprises a lock shell (1), a lock liner (2) and a key body (3) matched with the lock liner (2), wherein the lock shell (1) is provided with an axially arranged mounting hole (11), the lock liner (2) is arranged in the mounting hole (11) in a rotating manner, the lock liner (2) is provided with a key hole (21) which is axially arranged and is matched with the key body (3), the floating bead anti-theft lock is characterized in that a flat bead hole (12) communicated with the mounting hole (11) is radially arranged in the lock shell (1), a positioning top bead hole (22) and a first special-shaped bead hole (23) which are positioned at two sides of the key hole (21) and are communicated with the key hole are radially arranged in the lock liner (2), a second special-shaped bead hole (24) which is not in the same axis but is radially communicated with the first special-shaped bead hole (23) is also radially arranged in the lock liner (2), the first special-shaped bead hole (23) and the second special-shaped bead hole (24) form a special-shaped cavity (25), the width of the joint between the first special-shaped bead hole (23) and the second special-shaped bead hole (24) is smaller than the aperture of the first special-shaped bead hole (23) and the aperture of the second special-shaped bead hole (24), the first special-shaped bead hole (23) and the positioning top bead hole (22) are coaxial, and when the anti-theft lock is in a locking state, the second special-shaped bead hole (24) and the flat bead hole (12) are coaxial; a flat bead (41) and a first spring (42) are sequentially arranged in the flat bead hole (12) from outside to inside, a positioning top bead (43) and a second spring (44) are sequentially arranged in the positioning top bead hole (22) from outside to inside, a special-shaped bead (45) matched with the special-shaped cavity (25) is arranged in the special-shaped cavity (25), the special-shaped bead (45) is provided with a first special-shaped part (451) positioned in the first special-shaped bead hole (23) and a second special-shaped part (452) positioned in the second special-shaped bead hole (24), the key body (3) is provided with a floating bead hole (31), a floating bead (32) capable of axially moving relative to the floating bead hole is arranged in the floating bead hole (31), and the depth of the floating bead hole (31) is larger than the diameter of the floating bead (32); the upper end and the lower end of the floating bead hole (31) are respectively and inwardly protruded to form an upper annular clamping edge (35) and a lower annular clamping edge (36) which are used for clamping the floating bead (32) in the floating bead hole, and when the anti-theft lock is in a locked state, part of the flat bead (41) is clamped in the second special-shaped bead hole (24); when the anti-theft lock is in an unlocking state, after the floating bead (32) is jacked up by the positioning jacking bead (43), the floating bead jacks up the first special-shaped part (451), and the second special-shaped part (452) jacks up the flat bead (41) to enable the top end of the second special-shaped part (452) to be flush with the circumferential surface of the lock cylinder (2), so that unlocking is realized.
2. A lock according to claim 1, characterized in that the lower end surface of the first profile (451) is lower than the lower end surface of the second profile (452) so that the profile bead (45) forms a lower step (453), a counter-sunk (90) matching the lower step (453) is arranged in the profile cavity (25), and the lower step (453) abuts against the counter-sunk (90) when the lock is in the closed state.
3. A lock according to claim 2, characterized in that the maximum width of the opening at the upper end of said shaped chamber (25) in the radial direction of the cylinder (2) is greater than the diameter of the flat bead bore (12).
4. A lock according to claim 3, characterized in that the diameter of the first profile (451) is smaller than the diameter of the second profile (452), and the width of the connection between said first (451) and second (452) profiles is smaller than the diameter of said first (451) and second (452) profiles.
5. A lock according to claim 4, characterized in that the shaped bead (45) has a centre of gravity located on the second shaped portion (452).
6. A lock according to any one of claims 1 to 5, wherein the second spring (44) has a greater spring force than the first spring (42).
7. A lock according to any one of claims 1 to 5, wherein the end of said flat bead (41) facing said shaped bead (45) is cambered.
8. A floating bead anti-theft lock according to any one of claims 1-5, wherein the lower end of the positioning top bead (43) is convexly formed with an annular boss (431), the upper end of the positioning top bead hole (22) is convexly formed with an annular flange (221) matched with the annular boss (431), and when the anti-theft lock is in a locked state, the second spring (44) jacks up the positioning top bead (43) to enable the annular boss (431) to abut against the annular flange (221).
9. A lock according to claim 8, characterized in that said positioning knob hole (22) is further provided with a sealing ball (46) which does not expose out of said lock core (2), and one end of said second spring (44) acts on said sealing ball (46).
10. A floating ball key adapted to the floating ball anti-theft lock of any one of claims 1 to 9, comprising a key body (3), wherein the key body (3) is provided with a holding part and an unlocking part, characterized in that the unlocking part is provided with a floating ball hole (31), a floating ball (32) capable of moving axially relative to the floating ball hole (31) is arranged in the floating ball hole (31), and the depth of the floating ball hole (31) is greater than the diameter of the floating ball (32); the upper end and the lower end of the floating bead hole (31) are respectively protruded inwards to form an upper annular clamping edge (35) and a lower annular clamping edge (36) which are used for clamping the floating bead (32) in the floating bead hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920266023.5U CN210598474U (en) | 2019-03-01 | 2019-03-01 | Floating bead anti-theft lock and key matched with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920266023.5U CN210598474U (en) | 2019-03-01 | 2019-03-01 | Floating bead anti-theft lock and key matched with same |
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| CN210598474U true CN210598474U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723286A (en) * | 2019-03-01 | 2019-05-07 | 中山市基信锁芯有限公司 | A kind of key of floating ball anti-theft lock and its adaptation |
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2019
- 2019-03-01 CN CN201920266023.5U patent/CN210598474U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723286A (en) * | 2019-03-01 | 2019-05-07 | 中山市基信锁芯有限公司 | A kind of key of floating ball anti-theft lock and its adaptation |
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