CN112031556B - Hidden double-layer safety drawer and locking mechanism - Google Patents
Hidden double-layer safety drawer and locking mechanism Download PDFInfo
- Publication number
- CN112031556B CN112031556B CN202010850632.2A CN202010850632A CN112031556B CN 112031556 B CN112031556 B CN 112031556B CN 202010850632 A CN202010850632 A CN 202010850632A CN 112031556 B CN112031556 B CN 112031556B
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- China
- Prior art keywords
- drawer
- hidden
- positioning pin
- locking piece
- movable locking
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/46—Locks or fastenings for special use for drawers
- E05B65/462—Locks or fastenings for special use for drawers for two or more drawers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/483—Sliding drawers; Slides or guides therefor with single extensible guides or parts
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/80—Concealed drawers
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- Drawers Of Furniture (AREA)
Abstract
The invention provides a hidden double-layer safety drawer and a locking mechanism, wherein the locking mechanism comprises a lock shell, a movable locking piece and a positioning pin; the top of the lock shell is provided with a guide pipe extending upwards, the middle of the lock shell is provided with an accommodating cavity communicated with the guide pipe, the bottom of the lock shell is provided with an opening communicated with the accommodating cavity, at least one side of the opening is provided with a first slide rail, and the movable locking piece is arranged on the first slide rail; one end of the top of the movable locking piece is of a platform-shaped structure, the other end of the top of the movable locking piece inclines to the direction far away from the guide pipe to form a wedge-shaped structure, and a sliding groove which is transversely arranged is formed at the top of the movable locking piece; the positioning pin penetrates through the guide tube, and the bottom of the positioning pin is clamped in the sliding groove. When the locking mechanism is locked, the bright drawer and the dark drawer are relatively fixed, and the dark drawer cannot be exposed and opened at the same time; when the locking mechanism is unlocked, the bright drawer and the dark drawer can slide relatively, and the dark drawer can be opened, so that the dark drawer has better concealment.
Description
Technical Field
The invention relates to a safety drawer, in particular to a hidden double-layer safety drawer and a locking mechanism.
Background
At present, with the increasing requirement of the public on information confidentiality, the existing storage method of the confidential documents (or valuables) generally places the confidential documents in a safe box, so that the storage and taking processes of the confidential documents are inconvenient, and meanwhile, the safe box has a certain volume, the placement position is obvious, and the concealment is poor.
Aiming at the problem of poor concealment of the safe, the Chinese patent with the publication number of CN206190113U discloses a safe with a rear locking mechanism, the locking mechanism of the safe is arranged between the rear half of a drawer and a back plate of a cabinet body, and the front panel of the drawer is not provided with a keyhole, so that the difficulty of destroying the locking mechanism by lawbreakers can be increased, and the safety of the safe is improved to a certain extent; however, the safe itself is easy to attract attention of lawless persons, even if the locking mechanism is arranged at the rear side, the difficulty of destroying the locking mechanism by the lawless persons is increased, and once the safe is opened, the safety of confidential documents or valuables cannot be guaranteed.
Therefore, how to improve the concealment of the storage environment of the confidential documents on the premise of ensuring the convenient storage and taking of the confidential documents is a problem which is difficult to solve at present.
Disclosure of Invention
In order to solve the above technical problems, a first object of the present invention is to provide a locking mechanism for a hidden type double-layer security drawer having a light drawer and a dark drawer, wherein when the locking mechanism is locked, the light drawer and the dark drawer are relatively fixed, and the dark drawer is not exposed and opened; when the locking mechanism is unlocked, the bright drawer and the dark drawer can slide relatively, and the dark drawer can be opened, so that the dark drawer has better concealment.
The second purpose of the invention is to provide a concealed double-layer safety drawer with the locking mechanism.
In view of the above objects, one aspect of the present invention provides a locking mechanism for a concealed double-layer security drawer having a front drawer and a back drawer, the locking mechanism including a lock housing, a movable locking member and a positioning pin;
the top of the lock shell is provided with a guide pipe extending upwards, the middle part of the lock shell is provided with an accommodating cavity used for accommodating a movable locking piece, the accommodating cavity is communicated with the guide pipe, meanwhile, the bottom of the lock shell is provided with an opening communicated with the accommodating cavity, at least one side of the opening is provided with a first sliding rail, and the movable locking piece is arranged on the first sliding rail, so that the movable locking piece can move left and right along the first sliding rail under the action of external force;
one end of the top of the movable locking piece is of a platform-shaped structure, the other end of the top of the movable locking piece inclines to the direction far away from the guide pipe to form a wedge-shaped structure, and a sliding groove which is transversely arranged is formed in the top of the movable locking piece;
the positioning pin penetrates through the guide pipe, the bottom of the positioning pin is clamped in the sliding groove, and when the movable locking piece moves along the first sliding rail, the bottom of the positioning pin slides up and down in the sliding groove, so that the top of the positioning pin extends out of the guide pipe or contracts into the guide pipe along with the sliding of the movable locking piece.
Preferably, the bottom card of locating pin is located in the spout to when the removal latch fitting moves about along first slide rail, the bottom of locating pin is spacing in the spout that removes the latch fitting all the time.
Preferably, a clamping groove is formed in the part, close to the bottom, of the positioning pin, the upper edge of the sliding groove extends towards the middle to form a clamping edge, and the clamping edge is clamped in the clamping groove.
Preferably, the upper edge of the clamping groove is an inclined plane, and when the positioning pin is located at the wedge-shaped structure at the top of the movable locking piece, the edge of the clamping groove does not obstruct the movement of the movable locking piece.
Preferably, the bottom of the moving latch is provided with at least one protrusion structure as a point of application of an external force.
Preferably, two ends of the bottom of the lock shell extend to the left side and the right side respectively to form installation parts, and installation holes are formed in the installation parts.
In another aspect of the invention, a concealed double-layer safety drawer is provided, which comprises a light drawer and a dark drawer,
the light drawer comprises a bottom plate and side plates, wherein the bottom plate and the side plates are enclosed to form a first accommodating space with an upward opening, the left side plate and the right side plate of the light drawer extend downwards to form a second accommodating space, and the dark drawer is slidably arranged in the second accommodating space;
a pin hole is formed below the bottom of the front end side plate of the light drawer, and the front end of the dark drawer is embedded with the locking mechanism; when the hidden drawer is pushed to be overlapped with the bright drawer, the pin hole is opposite to the guide pipe of the locking mechanism;
in the process that the platform-shaped structure of the movable locking piece slides to the position below the positioning pin, the positioning pin is gradually jacked up to slide upwards along the guide pipe and inserted into the pin hole, and the hidden drawing and the bright drawing are locked at the moment;
when the movable locking piece slides in the opposite direction, the positioning pin slides downwards along the guide pipe under the driving of the sliding groove, gradually separates from the pin hole and contracts in the guide pipe, and the hidden drawer can slide relatively to the bright drawer at the moment.
Preferably, the safety drawer is further provided with a cover plate, the cover plate is fixed on the front end plate of the dark drawer, the bottom of the cover plate is not higher than the bottom of the dark drawer, and the upper part of the cover plate is not lower than the top of the light drawer, so that when the dark drawer and the light drawer are relatively fixed, the front end surface of the dark drawer is completely shielded.
Preferably, the upper end of the front end side plate of the dark drawer extends upwards and completely covers the front end plate of the light drawer.
Preferably, the inner sides of the bottoms of the left and right side plates of the light drawer are respectively provided with a second sliding rail, the two sides of the dark drawer are respectively provided with a sliding block, and when the positioning pin is contracted in the guide pipe, the dark drawer can slide out along the second sliding rails under the action of external force.
Compared with the prior art, the invention has the beneficial effects that:
the locking mechanism provided by the invention is ingenious in structure, is embedded in the hidden drawer of the hidden double-layer safety drawer, can realize the unlocking of the bright drawer and the hidden drawer by sliding and moving the locking piece, is relatively fixed with the hidden drawer in a locking state, pulls the bright drawer or the hidden drawer, synchronously moves the bright drawer and the hidden drawer, and the hidden drawer cannot be exposed or opened; when the locking mechanism is unlocked, the hidden drawer can slide relative to the bright drawer, and the hidden drawer can be opened only by pulling the hidden drawer at the moment, so that the confidential documents or other important articles are stored in the hidden drawer, and the concealment of the hidden drawer can be ensured in a locked state, thereby ensuring the safety of the confidential documents or other important articles; under the unlocking state, the convenience of storing and taking confidential documents or other important articles is effectively improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural view of a locking mechanism in an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the lock case in the embodiment of the present invention;
FIG. 3 is a schematic view of a moving lock in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a locating pin in an embodiment of the present invention;
FIG. 5 is a schematic view of a hidden double-layer safety drawer according to an embodiment of the present invention in a locked state;
FIG. 6 is a schematic view of the hidden type double-layer safety drawer shown in FIG. 5 in an unlocked state;
FIG. 7 is a schematic view of a hidden double-layer safety drawer according to another embodiment of the present invention in a locked state;
fig. 8 is a schematic structural view of the hidden type double-layer safety drawer shown in fig. 7 in a hidden-type opening state.
1. Bright pumping; 2. dark pumping; 3. a locking mechanism;
11. a first accommodating space; 12. a pin hole;
21. a slider; 22. a cover plate;
31. a lock case; 32. moving the locking piece; 33. positioning pins;
311. a guide tube; 312. an accommodating chamber; 313. an opening; 314. an installation part; 315. mounting holes;
321. a platform-like structure; 322. a wedge-shaped structure; 323. a chute; 324. a raised structure;
331. a clamping groove.
Detailed Description
The invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiment provides a locking mechanism 3, which is suitable for a hidden double-layer safety drawer with a light drawer 1 and a dark drawer 2, as shown in fig. 1, the locking mechanism 3 comprises a lock shell 31, a movable locking piece 32 and a positioning pin 33;
as shown in fig. 2, a guide tube 311 extending upward is formed at the top of the lock case 31, an accommodating cavity 312 for accommodating the movable locking piece 32 is formed at the middle of the lock case 31, the accommodating cavity 312 is communicated with the guide tube 311, an opening 313 communicated with the accommodating cavity 312 is formed at the bottom of the lock case 31, a first slide rail is arranged at least at one side of the opening 313, and the movable locking piece 32 is arranged on the first slide rail, so that the movable locking piece 32 can move left and right along the first slide rail under the action of external force;
as shown in fig. 3, one end of the top of the movable locking piece 32 is a platform-shaped structure 321, and the other end of the top is inclined to a direction away from the guide tube 311 to form a wedge-shaped structure 322, and a sliding groove 323 arranged transversely is formed at the top of the movable locking piece 32;
the positioning pin 33 penetrates through the guide tube 311, the bottom of the positioning pin 33 is clamped in the sliding groove 323, and when the moving locking piece 32 moves along the first sliding rail, the bottom of the positioning pin 33 slides up and down in the sliding groove 323, so that the top of the positioning pin 33 extends out of the guide tube 311 or retracts into the guide tube 311 along with the sliding of the moving locking piece 32.
In a preferred embodiment, the bottom of the positioning pin 33 is engaged with the sliding groove 323, so that when the movable locking component 32 moves left and right along the first sliding rail, the bottom of the positioning pin 33 is always limited in the sliding groove 323 of the movable locking component 32.
In a preferred embodiment, as shown in fig. 4, a locking groove 331 is formed at a portion of the positioning pin 33 near the bottom, and an upper edge of the sliding groove 323 extends toward the middle to form a locking edge, which is locked in the locking groove 331.
In a preferred embodiment, the upper edge of the locking groove 331 is a slope, and when the positioning pin 33 is located at the wedge-shaped structure 322 at the top of the movable locking member 32, the edge of the locking groove 331 does not obstruct the movement of the movable locking member 32.
In a preferred embodiment, the bottom of the moving latch 32 is provided with at least one raised structure 324 that serves as a point of application of the external force.
In a preferred embodiment, the two ends of the bottom of the lock case 31 extend to the left and right to form mounting portions 314, and the mounting portions 314 are provided with mounting holes 315.
Based on the locking mechanism 3, the embodiment also provides a hidden double-layer safety drawer, which comprises a light drawer 1 and a dark drawer 2,
as shown in fig. 5 and 6, the light drawer 1 includes a bottom plate and side plates, the bottom plate and the side plates are closed to form a first accommodating space 11 enclosing an upward opening 313, the left and right side plates of the light drawer 1 extend downward to form a second accommodating space, and the dark drawer 2 is slidably disposed in the second accommodating space;
a pin hole 12 is formed below the bottom of the front end side plate of the light drawer 1, and the locking mechanism 3 is embedded at the front end of the dark drawer 2; when the dark drawer 2 is pushed to be overlapped with the bright drawer 1, the pin hole 12 is opposite to the guide tube 311 of the locking mechanism 3;
in the process that the platform-shaped structure 321 of the movable locking piece 32 slides to the lower part of the positioning pin 33, the positioning pin 33 is gradually jacked up to slide upwards along the guide tube 311 and inserted into the pin hole 12, and at the moment, the dark drawer 2 is locked with the bright drawer 1;
when the movable locking piece 32 slides in the opposite direction, the positioning pin 33 slides downwards along the guide tube 311 under the driving of the sliding groove 323, gradually separates from the pin hole 12, and contracts into the guide tube 311, and at this time, the hidden drawer 2 can slide relatively to the bright drawer 1.
In a preferred embodiment, as shown in fig. 7 and 8, the safety drawer is further provided with a cover plate 22, the cover plate 22 is fixed on the front end plate of the dark drawer 2, the bottom of the cover plate 22 is not higher than the bottom of the dark drawer 2, and the upper part of the cover plate 22 is not lower than the top of the bright drawer 1, so that when the dark drawer 2 is fixed relative to the bright drawer 1, the front end surface of the dark drawer 2 is completely shielded.
In a preferred embodiment, the upper end of the front end side plate of the dark drawer 2 extends upwards and completely covers the front end plate of the bright drawer 1.
In a preferred embodiment, the inner sides of the bottoms of the left and right side plates of the light drawer 1 are provided with second slide rails, as shown in fig. 6 or 8, the two sides of the dark drawer 2 are provided with slide blocks 21, and when the positioning pins 33 are retracted into the guide tubes 311, the dark drawer 2 can slide out along the second slide rails under the action of external force.
The locking mechanism provided by the invention is ingenious in structure, is embedded in the hidden drawer of the hidden double-layer safety drawer, can realize the unlocking of the bright drawer and the hidden drawer by sliding and moving the locking piece, is relatively fixed with the hidden drawer in a locking state, pulls the bright drawer or the hidden drawer, synchronously moves the bright drawer and the hidden drawer, and the hidden drawer cannot be exposed or opened; when the locking mechanism is unlocked, the hidden drawer can slide relative to the bright drawer, and only the hidden drawer can be opened by pulling the hidden drawer, so that confidential documents or other important articles are stored in the hidden drawer, and the concealment of the hidden drawer can be ensured in a locked state, thereby ensuring the safety of the confidential documents or other important articles; under the unlocking state, the convenience of storing and taking confidential documents or other important articles is effectively improved.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. A locking mechanism is suitable for a hidden double-layer safety drawer with a light drawer (1) and a dark drawer (2), and is characterized by comprising a lock shell (31), a movable locking piece (32) and a positioning pin (33);
the top of the lock shell (31) is provided with a guide pipe (311) extending upwards, the middle of the lock shell (31) is provided with an accommodating cavity (312) for accommodating a movable locking piece (32), the accommodating cavity (312) is communicated with the guide pipe (311), meanwhile, the bottom of the lock shell (31) is provided with an opening (313) communicated with the accommodating cavity (312), at least one side of the opening (313) is provided with a first sliding rail, and the movable locking piece (32) is arranged on the first sliding rail, so that the movable locking piece (32) can move left and right along the first sliding rail under the action of external force;
one end of the top of the movable locking piece (32) is a platform-shaped structure (321), the other end of the top of the movable locking piece inclines to a direction far away from the guide pipe (311) to form a wedge-shaped structure (322), and a sliding groove (323) which is transversely arranged is formed at the top of the movable locking piece (32);
the positioning pin (33) penetrates through the guide pipe (311), the bottom of the positioning pin (33) is clamped in the sliding groove (323), when the movable locking piece (32) moves along the first sliding rail, the bottom of the positioning pin (33) slides up and down in the sliding groove (323), and therefore the top of the positioning pin (33) extends out of the guide pipe (311) or contracts into the guide pipe (311) along with the sliding of the movable locking piece (32).
2. A locking mechanism according to claim 1, wherein the bottom of the positioning pin (33) is engaged in the sliding groove (323), so that when the movable locking member (32) moves left and right along the first sliding rail, the bottom of the positioning pin (33) is always limited in the sliding groove (323) of the movable locking member (32).
3. A locking mechanism according to claim 2, wherein a locking groove (331) is formed at a portion of the positioning pin (33) near the bottom, and an upper edge of the sliding groove (323) extends toward the middle to form a locking edge, and the locking edge is locked in the locking groove (331).
4. A locking mechanism according to claim 3, wherein the upper edge of the locking groove (331) is a bevel, and when the positioning pin (33) is at the wedge-shaped structure (322) at the top of the moving lock (32), the edge of the locking groove (331) does not obstruct the movement of the moving lock (32).
5. A locking mechanism according to claim 1, wherein the bottom of the moving lock (32) is provided with at least one raised formation (324) which acts as a point of application of the external force.
6. A locking mechanism according to claim 1, wherein the bottom of the lock housing (31) has two ends extending to the left and right to form mounting portions (314), and the mounting portions (314) are provided with mounting holes (315).
7. A hidden double-layer safety drawer is characterized by comprising a light drawer (1) and a dark drawer (2),
the light drawer (1) comprises a bottom plate and side plates, wherein the bottom plate and the side plates are combined to enclose a first accommodating space (11) with an upward opening (313), the left side plate and the right side plate of the light drawer (1) extend downwards to form a second accommodating space, and the dark drawer (2) is slidably arranged in the second accommodating space;
a pin hole (12) is formed below the bottom of the front end side plate of the light drawer (1), and the front end of the dark drawer (2) is embedded with the locking mechanism (3) as claimed in any one of claims 1-6; when the hidden drawer (2) is pushed to be overlapped with the bright drawer (1), the pin hole (12) is opposite to the guide pipe (311) of the locking mechanism (3);
in the process that the platform-shaped structure (321) of the movable locking piece (32) slides to the position below the positioning pin (33), the positioning pin (33) is gradually jacked up to slide upwards along the guide pipe (311) and inserted into the pin hole (12), and the hidden drawer (2) and the bright drawer (1) are locked at the moment;
when the movable locking piece (32) slides in the opposite direction, the positioning pin (33) slides downwards along the guide pipe (311) under the driving of the sliding groove (323), gradually disengages from the pin hole (12) and contracts into the guide pipe (311), and the hidden drawer (2) can slide relatively to the bright drawer (1).
8. A hidden double-layer safety drawer according to claim 7, characterized in that the safety drawer is further provided with a cover plate (22), the cover plate (22) is fixed on the front end plate of the hidden drawer (2), the bottom of the cover plate is not higher than the bottom of the hidden drawer (2), and the upper part of the cover plate is not lower than the top of the hidden drawer (1), so that when the hidden drawer (2) is fixed relative to the hidden drawer (1), the front end surface of the hidden drawer (2) is completely shielded.
9. A hidden double-layer safety drawer according to claim 7, characterized in that the upper end of the front side plate of the dark drawer (2) extends upwards and completely covers the front end plate of the bright drawer (1).
10. A hidden double-layer safety drawer according to claim 7, characterized in that the inner sides of the bottoms of the left and right side plates of the light drawer (1) are provided with second sliding rails, the two sides of the dark drawer (2) are provided with sliding blocks (21), and when the positioning pin (33) is retracted into the guide tube (311), the dark drawer (2) can slide out along the second sliding rails under the action of external force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010850632.2A CN112031556B (en) | 2020-08-21 | 2020-08-21 | Hidden double-layer safety drawer and locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010850632.2A CN112031556B (en) | 2020-08-21 | 2020-08-21 | Hidden double-layer safety drawer and locking mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112031556A CN112031556A (en) | 2020-12-04 |
| CN112031556B true CN112031556B (en) | 2021-06-22 |
Family
ID=73580425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010850632.2A Active CN112031556B (en) | 2020-08-21 | 2020-08-21 | Hidden double-layer safety drawer and locking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112031556B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105747615A (en) * | 2016-05-18 | 2016-07-13 | 朱小菊 | Safety drawer cabinet |
| CN108209247A (en) * | 2018-02-02 | 2018-06-29 | 杭州柴火创坊科技有限公司 | Concealed cabinet |
| CN211092763U (en) * | 2019-11-06 | 2020-07-28 | 康新（中国）设计工程股份有限公司 | Hidden multilayer drawer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10750863B2 (en) * | 2017-07-20 | 2020-08-25 | Black Pearl Woodworks LLC | Drawer system having primary and concealed drawers |
-
2020
- 2020-08-21 CN CN202010850632.2A patent/CN112031556B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105747615A (en) * | 2016-05-18 | 2016-07-13 | 朱小菊 | Safety drawer cabinet |
| CN108209247A (en) * | 2018-02-02 | 2018-06-29 | 杭州柴火创坊科技有限公司 | Concealed cabinet |
| CN211092763U (en) * | 2019-11-06 | 2020-07-28 | 康新（中国）设计工程股份有限公司 | Hidden multilayer drawer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112031556A (en) | 2020-12-04 |
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