CN109577747B - Measuring tool for blade lockset and unlocking method based on measuring tool - Google Patents
Measuring tool for blade lockset and unlocking method based on measuring tool Download PDFInfo
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- CN109577747B CN109577747B CN201811547920.XA CN201811547920A CN109577747B CN 109577747 B CN109577747 B CN 109577747B CN 201811547920 A CN201811547920 A CN 201811547920A CN 109577747 B CN109577747 B CN 109577747B
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- guide rod
- guide
- measuring
- rod
- blade
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/20—Skeleton keys; Devices for picking locks; Other devices for similar purposes ; Means to open locks not otherwise provided for, e.g. lock pullers
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B29/00—Cylinder locks and other locks with plate tumblers which are set by pushing the key in
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a measuring tool for a blade lockset and an unlocking method based on the measuring tool, comprising a measuring device, a positioning rod and a guide rod assembly; the guide rod assembly comprises a front guide rod and a rear guide rod; the side wall of the positioning rod is provided with a guide groove along the length direction, a front guide rod of the guide rod assembly is accommodated in the guide groove and slides back and forth along the guide groove, and a rear guide rod of the guide rod assembly passes through the measuring device and is used for measuring the sliding distance of the front guide rod; compared with the prior art, the device is convenient to install, the guide block at the end part of the positioning rod is used for hooking the innermost blade in the lock hole, the end part of the rear guide rod is fixed through the handle, so that the front guide rod is driven to slide in the guide groove, the moving distance is displayed on the measuring instrument, the blades are hooked one by one in sequence through the guide block, and a new key is distributed through data recorded by the measuring instrument each time to unlock the lockset.
Description
Technical Field
The invention belongs to the technical field of unlocking tools, and particularly relates to a measuring tool for a blade lockset and an unlocking method based on the measuring tool.
Background
Locks are widely used in daily life, and are used with keys, which are carried around. In the carrying process, people always have the occurrence of the problem that keys are lost, when the situation occurs, besides a part of locks with low price, low price and the like and simple structures can be easily opened by violent damage, locksmiths are required to go to the door for maintenance, and locks are opened and keys are prepared in a technical unlocking mode.
The existing blade lock comprises a lock sleeve, a lock cylinder, a blade set and a key. The blade group consists of blades and blade springs, the blade group is positioned in a blade hole of the lock cylinder, a lock pit matched with the end part of the blades is formed in the inner wall of the lock sleeve, and the blades are positioned between the blade hole of the lock cylinder and the lock pit of the lock sleeve to lock the lock cylinder and the lock sleeve when in locking, so that the lock cylinder cannot rotate relative to the lock sleeve; when unlocking, after the key is inserted along the center of the lock core, the wave groove teeth on the key drive the corresponding blades to move, so that the blades are separated from the lock pits of the lock sleeve and all enter the blade holes of the lock core, and the lock core can rotate relative to the lock sleeve, thereby achieving the aim of unlocking; at present, no good unlocking method is adopted for the blade lock in the market, and a violent unlocking mode is adopted mostly, namely, a new lock cylinder is replaced for a customer after the lock cylinder is directly knocked off by a drill bit, so that resource waste is directly caused, and the single cost of the customer is increased; although the unlocking can be realized by a few technical unlocking methods, the difficulty is high, some of the unlocking methods need repeated attempts, the success rate of single time is low, and the time for unlocking is long.
In view of the above-described problems, improvements are needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a measuring tool for a blade lock and an unlocking method based on the measuring tool, which are not only suitable for unlocking various blade locks, but also can be used for preparing a key according to the tool after unlocking, so that a user is prevented from being forced to change the lock due to missing of the key.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a measuring tool for a blade lock comprises a measuring device, a positioning rod and a guide rod assembly; the guide rod assembly comprises a front guide rod and a rear guide rod; the front guide rod is fixedly connected with the rear guide rod, the side wall of the positioning rod is provided with a guide groove along the length direction of the positioning rod, the front guide rod of the guide rod assembly is accommodated in the guide groove and slides back and forth along the guide groove, and the outer end of the front guide rod and the outer end of the positioning rod are on the same vertical plane; the rear guide rod of the guide rod assembly passes through the measuring device and is used for measuring the sliding distance of the front guide rod; the front end of the positioning rod is provided with at least one outwards-protruding guide block, and the guide block is fixedly connected with the positioning rod and integrally formed.
As a preferable scheme of the invention, two guide blocks are arranged symmetrically on the left side and the right side of the guide groove.
As a preferable mode of the present invention, the guide block is a spike.
As a preferable scheme of the invention, the guide groove is in an I shape, and the shape of the front guide rod corresponds to the guide groove in the I shape, and the front guide rod is matched with the guide groove to be clamped.
As a preferable scheme of the invention, a connecting seat which is an L-shaped body is arranged between the measuring device and the positioning rod, and the connecting seat comprises a horizontal part and a vertical part; the bottom end of the horizontal part is fixedly connected with the measuring device, and the vertical part is fixedly connected with the positioning rod; and a containing groove for sliding the guide rod component is formed between the vertical part of the connecting seat and the measuring device.
As a preferred embodiment of the present invention, the measuring device includes a measuring instrument and a measuring base, the measuring instrument is connected to the measuring base, a rear guide rod capable of synchronously rotating the measuring instrument is sleeved in the measuring base, and the end of the rear guide rod is fixed on the handle.
As a preferable scheme of the invention, the front side edge of the positioning rod is an inclined bevel edge, and the inclination angle of the bevel edge is consistent with that of the guide block.
As a preferable mode of the invention, the inclination angle of the bevel edge and the inclination angle of the guide block are 30-60 degrees.
As a preferable scheme of the invention, the side surface of the measuring seat is also provided with a limit threaded rod for fixing the free extension of the rear guide rod.
A method of unlocking a measurement tool for a blade lock, comprising the steps of:
step one: inserting a positioning rod of a measuring tool into a lock hole of a blade lock to be unlocked, wherein one side of a guide groove faces to the blade and is tightly attached to the blade side; the blades are extruded by the lock holes to shrink, so that the guide blocks at the end parts of the positioning rods are completely inserted into the lock holes;
step two: after the guide block is inserted, the guide block at the end part of the positioning rod is used for hooking the innermost blade in the lock hole, and the front guide rod and the rear guide rod are moved through the deflector rod guide rod assembly;
step three: when the front guide rod moves to the innermost blade, the front guide rod is in conflict with the blade, namely the blade moves in place, the stirring of the guide rod assembly is stopped, and the front guide rod is kept static under the action of the blade; then, recording data by a measuring instrument on the measuring seat;
step four: the guide blocks at the end parts of the positioning rods are poked outwards to hook the blades one by one, then the guide blocks are in contact with the blades one by one through the front guide rods, and data of poking the front guide rods each time are recorded through a measuring instrument;
step five: when all the blades are in place, the positioning rod is pulled out of the lock hole, and the positioning rod is separated from the lock hole;
step six: and (3) distributing a new key through the data recorded by the measuring instrument each time, and unlocking the lockset.
The beneficial effects of the invention are as follows: compared with the prior art, the device is convenient to install, the guide blocks at the end parts of the positioning rods are used for hooking the innermost blades in the lock holes, the end parts of the rear guide rods are fixed through the handles, so that the front guide rods are driven to slide in the guide grooves, the moving distance is displayed on the measuring instrument, the blades are hooked one by one in sequence through the guide blocks, then the front guide rods are in contact with the blades one by one, and the data of each time of poking the front guide rods is recorded through the measuring instrument; the tool provided by the invention can be used for unlocking the blade lock without special manipulation and skill, and is not dependent on subjective judgment, is not influenced by the spring state of the blade in the lock, and can be unlocked by carefully operating the tool according to the steps as long as the tool is in a healthy state in which the key can be unlocked.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a rear view of the present invention;
FIG. 4 is an exploded view of the present invention;
FIG. 5 is an enlarged view of part of the invention in the A direction;
reference numerals in the drawings: measuring device 1, locating lever 2, guide arm subassembly 3, preceding guide arm 4, back guide arm 5, guide slot 6, guide block 7, connecting seat 8, horizontal part 8-1, perpendicular part 8-2, holding tank 9, measuring instrument 10, measuring seat 11, handle 12, spacing threaded rod 13.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1-5, a measuring tool for a blade lock comprises a measuring device 1, a positioning rod 2 and a guide rod assembly 3; the guide rod assembly 3 comprises a front guide rod 4 and a rear guide rod 5; the front guide rod 4 is fixedly connected with the rear guide rod 5, the side wall of the positioning rod 2 is provided with a guide groove 6 along the length direction, the front guide rod 4 of the guide rod assembly 3 is accommodated in the guide groove 6 and slides back and forth along the guide groove 6, and the outer end of the front guide rod 4 and the outer end of the positioning rod 2 are on the same vertical plane; the rear guide rod 5 of the guide rod assembly 3 passes through the measuring device 1 and is used for measuring the sliding distance of the front guide rod 4; the device is convenient to install, the guide blocks at the end parts of the positioning rods are used for hooking the innermost blades in the lock holes, the end parts of the rear guide rods are fixed through the handles, so that the front guide rods are driven to slide in the guide grooves, the moving distance is displayed on the measuring instrument, the blades are hooked one by one in sequence through the guide blocks, then the front guide rods are abutted against the blades one by one, and the data of the front guide rods which are poked each time are recorded through the measuring instrument; the tool provided by the invention can be used for unlocking the blade lock without special manipulation and skill, and is not dependent on subjective judgment, is not influenced by the spring state of the blade in the lock, and can be unlocked by carefully operating the tool according to the steps as long as the tool is in a healthy state in which the key can be unlocked.
The front end of the positioning rod 2 is provided with at least one outwards-protruding guide block 7, and the guide block 7 is fixedly connected with the positioning rod 2 and integrally formed; the structural strength and the overall firmness of the device are increased, so that the accuracy of measurement is higher.
The front side of the positioning rod 2 is an inclined bevel edge 2-1, namely the front side of the positioning rod 2 gradually inclines upwards from front to back, and the inclination angle of the bevel edge 2-1 is consistent with the inclination angle of the guide block 7; the improved structure ensures that the positioning rod 2 can smoothly push the blade to slide towards the direction of the marble hole of the outer core when being inserted into the lock hole, and the guide block 7 at the front end of the positioning rod 2 is guided to be smoothly inserted into the innermost part of the lock hole; the inclination angle of the bevel edge 2-1 and the inclination angle of the guide block 7 are 30 degrees, 40 degrees, 45 degrees and 60 degrees; the invention adopts 45 degrees.
The guide blocks 7 are arranged in two, symmetrically arranged on the left side and the right side of the guide groove 6, and by adopting the structure, when the positioning rod 2 is inserted into the lock hole, the two guide blocks 7 are more accurate and stable in extrusion and positioning of the blade, so that the guide blocks 7 can be aligned with the blade.
The guide block 7 is a spike part, and one surface of the spike part is on the same horizontal plane with the bevel edge 2-1, so that when the positioning rod 2 is inserted into a lock hole, the guide block 7 can smoothly push the blade to slide towards the direction of the outer core marble hole, and the operation is convenient.
The guide groove 6 is in an I-shaped form, and the shape of the front guide rod 4 corresponds to the I-shaped guide groove 6, and the front guide rod 4 is matched with the guide groove 6 to be clamped; by adopting the scheme, the sliding stability of the front guide rod 4 in the guide groove 6 is increased, the front guide rod 4 is prevented from sliding out of the guide groove 6, and the use safety and the measurement accuracy are further ensured.
A connecting seat 8 in an L shape body is arranged between the measuring device 1 and the positioning rod 2, and the connecting seat 8 comprises a horizontal part 8-1 and a vertical part 8-2; the bottom end of the horizontal part 8-1 is fixedly connected with the measuring device 1, and the vertical part 8-2 is fixedly connected with the positioning rod 2; a containing groove 9 for sliding the guide rod assembly 3 is formed between the vertical part 8-2 of the connecting seat 8 and the measuring device 1; by adopting the scheme, firstly, the design rationality and the structural firmness of the whole measuring tool are improved, and meanwhile, the sliding of the front guide rod 4 and the rear guide rod 5 is more convenient, so that convenience is provided for subsequent measurement.
The measuring device 1 comprises a measuring instrument 10 and a measuring seat 11, wherein the measuring instrument 10 is connected to the measuring seat 11, a rear guide rod 5 capable of enabling the measuring instrument 10 to synchronously rotate is sleeved in the measuring seat 11, and the tail end of the rear guide rod 5 is fixed on a handle 12.
The sliding distance of the front guide rod 4 in the guide groove 6 can be accurately displayed on the measuring instrument 10, no special skill or skill is needed, no manual judgment is needed, the influence of the spring state of the blade in the lock is avoided, the lock can be opened by adopting the mode as long as the lock is in the healthy state that the key can be opened, and the side surface of the measuring seat 11 is also provided with a limit threaded rod 13 for fixing the free expansion of the rear guide rod 5. By adopting the scheme, the rear guide rod 5 can be prevented from being directly pulled out of the measuring seat 11, so that measurement inaccuracy is caused.
An unlocking method based on a measuring tool comprises the following steps:
step one: the positioning rod 2 of the measuring tool is inserted into a lock hole of the blade lock to be unlocked, one side of the guide groove 6 faces the blade, and the guide groove is tightly attached to the blade side; the blades are extruded by the lock holes to shrink, so that the guide blocks 7 at the end parts of the positioning rods 2 are completely inserted into the lock holes;
step two: after the guide block 7 at the end part of the positioning rod 2 is used for hooking the innermost blade in the lock hole, and the front guide rod 4 and the rear guide rod 5 are moved through the deflector rod guide rod assembly 3;
step three: when the front guide rod 4 moves to the innermost blade, the front guide rod 4 is in contact with the blade, namely the blade moves in place, the stirring of the guide rod assembly 3 is stopped, and the front guide rod 4 is kept static under the action of the blade; then, the data is recorded by the measuring instrument 10 on the measuring seat 11;
step four: the guide blocks 7 at the end part of the positioning rod 2 are poked outwards to hook the blades one by one, then the blades are abutted against one by one through the front guide rod 4, and the data of poking the front guide rod 4 each time is recorded through the measuring instrument 10;
step five: when all the blades are in place, the positioning rod 2 is pulled out of the lock hole, and the positioning rod 2 is separated from the lock hole;
step six: a new key is dispensed by the data recorded each time by the measuring instrument 10 to unlock the lock.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more herein: the measuring device comprises the following terms, namely a measuring device 1, a positioning rod 2, a guide rod assembly 3, a front guide rod 4, a rear guide rod 5, a guide groove 6, a guide block 7, a connecting seat 8, a horizontal part 8-1, a vertical part 8-2, a containing groove 9, a measuring instrument 10, a measuring seat 11, a handle 12, a limit threaded rod 13 and the like, but the possibility of using other terms is not excluded; these terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (10)
1. A measuring tool for a blade lock, characterized by: comprises a measuring device (1), a positioning rod (2) and a guide rod assembly (3); the guide rod assembly (3) comprises a front guide rod (4) and a rear guide rod (5); the front guide rod (4) is fixedly connected with the rear guide rod (5), a guide groove (6) is formed in the side wall of the positioning rod (2) along the length direction of the positioning rod, the front guide rod (4) of the guide rod assembly (3) is contained in the guide groove (6) and slides back and forth along the guide groove (6), and the outer end of the front guide rod (4) and the outer end of the positioning rod (2) are on the same vertical plane; the rear guide rod (5) of the guide rod assembly (3) passes through the measuring device (1) and is used for measuring the sliding distance of the front guide rod (4); the front end of the positioning rod (2) is provided with at least one outwards-protruding guide block (7), and the guide block (7) is fixedly connected with the positioning rod (2) and integrally formed.
2. A measuring tool for a blade lock according to claim 1, wherein: the guide blocks (7) are arranged at two, and are symmetrically arranged at the left side and the right side of the guide groove (6).
3. A measuring tool for a blade lock according to claim 2, wherein: the guide block (7) is a spike part.
4. A measuring tool for a blade lock according to claim 2, wherein: the guide groove (6) is in an I-shaped form, and the shape of the front guide rod (4) corresponds to the guide groove (6) in the I-shaped form, and the front guide rod (4) is matched with the guide groove (6) in a clamping manner.
5. A measuring tool for a blade lock according to claim 1, wherein: a connecting seat (8) which is an L-shaped body is arranged between the measuring device (1) and the positioning rod (2), and the connecting seat (8) comprises a horizontal part (8-1) and a vertical part (8-2); the bottom end of the horizontal part (8-1) is fixedly connected with the measuring device (1), and the vertical part (8-2) is fixedly connected with the positioning rod (2); and, a containing groove (9) for sliding the guide rod assembly (3) is formed between the vertical part (8-2) of the connecting seat (8) and the measuring device (1).
6. A measuring tool for a blade lock according to claim 1 or 5, characterized in that: the measuring device (1) comprises a measuring instrument (10) and a measuring seat (11), wherein the measuring instrument (10) is connected to the measuring seat (11), a rear guide rod (5) capable of enabling the measuring instrument (10) to synchronously rotate is sleeved in the measuring seat (11), and the tail end of the rear guide rod (5) is fixed on a handle (12).
7. A measuring tool for a blade lock according to claim 1 or 5, characterized in that: the front side of the positioning rod (2) is an inclined bevel edge (2-1), and the inclination angle of the bevel edge (2-1) is consistent with that of the guide block (7).
8. A measuring tool for a blade lock according to claim 7, wherein: the inclination angle of the bevel edge (2-1) and the inclination angle of the guide block (7) are 30-60 degrees.
9. A measuring tool for a blade lock according to claim 6, wherein: the side of the measuring seat (11) is also provided with a limit threaded rod (13) for fixing the free extension of the rear guide rod (5).
10. A method of unlocking based on the measuring tool of any one of claims 1-9, comprising the steps of:
step one: inserting a positioning rod (2) of a measuring tool into a lock hole of a blade lock to be unlocked, wherein one side of a guide groove (6) faces the blade and is tightly attached to the blade side; the blades are extruded by the lock holes to shrink, so that the guide blocks (7) at the end parts of the positioning rods (2) are completely inserted into the lock holes;
step two: after the guide block (7) at the end part of the positioning rod (2) is used for hooking the innermost blade in the lock hole, and the front guide rod (4) and the rear guide rod (5) are moved through the deflector rod guide rod assembly (3);
step three: when the front guide rod (4) moves to the innermost blade, the front guide rod (4) is in contact with the blade, namely the blade moves in place, the stirring of the guide rod assembly (3) is stopped, and the front guide rod (4) is kept static under the action of the blade; then, recording data by a measuring instrument (10) on a measuring seat (11);
step four: the guide blocks (7) at the end parts of the positioning rods (2) are shifted outwards to hook the blades one by one, then the blades are abutted against one by one through the front guide rods (4), and data of shifting the front guide rods (4) each time are recorded through the measuring instrument (10);
step five: when all the blades are in place, the positioning rod (2) is pulled out of the lock hole, and the positioning rod (2) is separated from the lock hole;
step six: a new key is dispensed through the data recorded by the measuring instrument (10) each time, and the lock is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547920.XA CN109577747B (en) | 2018-12-18 | 2018-12-18 | Measuring tool for blade lockset and unlocking method based on measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547920.XA CN109577747B (en) | 2018-12-18 | 2018-12-18 | Measuring tool for blade lockset and unlocking method based on measuring tool |
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| Publication Number | Publication Date |
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| CN109577747A CN109577747A (en) | 2019-04-05 |
| CN109577747B true CN109577747B (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811547920.XA Active CN109577747B (en) | 2018-12-18 | 2018-12-18 | Measuring tool for blade lockset and unlocking method based on measuring tool |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763114B (en) * | 2019-11-27 | 2021-08-06 | 公安部第三研究所 | Blade distance measuring device and method of blade lock |
| CN114482705B (en) * | 2022-02-11 | 2023-05-05 | 杭州丹盾安防科技有限公司 | Unlocking tool for blade lock and unlocking method based on unlocking tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003707A (en) * | 2001-06-25 | 2003-01-08 | Katsuyoshi Hayashi | Key for cylinder lock |
| JP2004132068A (en) * | 2002-10-11 | 2004-04-30 | Atelier Koramu:Kk | Unlocking tool |
| CN204881438U (en) * | 2015-07-16 | 2015-12-16 | 杭州丹盾安防科技有限公司 | Measurement device for tool to lock maintenance |
| CN209780466U (en) * | 2018-12-18 | 2019-12-13 | 杭州丹盾安防科技有限公司 | measuring tool for blade lock |
-
2018
- 2018-12-18 CN CN201811547920.XA patent/CN109577747B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003707A (en) * | 2001-06-25 | 2003-01-08 | Katsuyoshi Hayashi | Key for cylinder lock |
| JP2004132068A (en) * | 2002-10-11 | 2004-04-30 | Atelier Koramu:Kk | Unlocking tool |
| CN204881438U (en) * | 2015-07-16 | 2015-12-16 | 杭州丹盾安防科技有限公司 | Measurement device for tool to lock maintenance |
| CN209780466U (en) * | 2018-12-18 | 2019-12-13 | 杭州丹盾安防科技有限公司 | measuring tool for blade lock |
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