CN111140151A - Sealed metal door - Google Patents
Sealed metal door Download PDFInfo
- Publication number
- CN111140151A CN111140151A CN201911312774.7A CN201911312774A CN111140151A CN 111140151 A CN111140151 A CN 111140151A CN 201911312774 A CN201911312774 A CN 201911312774A CN 111140151 A CN111140151 A CN 111140151A
- Authority
- CN
- China
- Prior art keywords
- door
- hinged door
- hinged
- connecting plate
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
- E06B7/22—Sealing arrangements on wings or parts co-operating with the wings by means of elastic edgings, e.g. elastic rubber tubes; by means of resilient edgings, e.g. felt or plush strips, resilient metal strips
- E06B7/23—Plastic, sponge rubber, or like strips or tubes
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/12—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against air pressure, explosion, or gas
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/26—Rain or draught deflectors, e.g. under sliding wings also protection against light for doors
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Abstract
The invention discloses a sealed metal door which comprises a door frame, wherein a first hinged door is hinged in the door frame, a limiting vertical plate is arranged below the left side of the first hinged door, a second hinged door is hinged at the lower end of the first hinged door, an L-shaped connecting plate is arranged on the lower end face of one side, connected with the first hinged door, of the second hinged door, the L-shaped connecting plate is in contact with the limiting vertical plate, a first groove is formed in the left side of the first hinged door, a first clamping block matched with the first groove is arranged on the left side in the door frame, a second groove is formed in the right side of the first hinged door, a third groove corresponding to the second groove is formed in the right side in the door frame, a telescopic assembly is arranged in the third groove, and the telescopic assembly is connected with a second clamping block matched and. According to the invention, the first hinged door is covered in the door frame, and the telescopic assembly controls the second clamping block to be clamped in the second groove, so that wind and sound are prevented from being transmitted into a room through a gap between the first hinged door and the door frame.
Description
Technical Field
The invention relates to the technical field of metal doors, in particular to a sealed metal door.
Background
The metal door is also a common living room door type, generally, the used fittings are made of stainless steel or zinc-plated materials, and PVC is pasted on the surface.
Some existing metal doors are installed at a stair opening, some metal doors are arranged at the stair opening, gaps are reserved below the metal doors, the stair opening can be seen, wind and sound can not be prevented, and the sealing performance is not good.
Disclosure of Invention
In view of the above, the present invention is directed to a sealed metal door that addresses all or one of the problems of the background art.
The invention provides a sealed metal door based on the above purpose, which comprises a door frame, wherein a first hinged door is hinged in the door frame, the left side of the first hinged door is hinged with the inner side wall of the door frame through a first hinge, a limiting vertical plate is arranged below the left side of the first hinged door and is vertically arranged with a horizontal line, the limiting vertical plate is vertically arranged at the inner side of the door frame and is connected with the inner side of the door frame, the lower end of the first hinged door is hinged with a second hinged door, the lower end surface of one side of the second hinged door, which is connected with the first hinged door, is provided with an L-shaped connecting plate, a first connecting plate of the L-shaped connecting plate is connected with the second hinged door in parallel, the first connecting plate and the second connecting plate are vertically connected with each other, and the second connecting plate of the L-shaped connecting plate is vertically arranged with the second hinged door, the L-shaped connecting plate is in contact with the limiting vertical plate, and is closed in a door frame when a first hinged door is closed, the L-shaped connecting plate is located at the front side of the limiting vertical plate and is in an open state when the first hinged door is opened, the limiting vertical plate limits the clockwise turning degree of the L-shaped connecting plate, the limiting vertical plate is perpendicular to the first connecting plate, the second hinged door is parallel to the first hinged door, a first groove is formed in the left side of the first hinged door, a first clamping block matched with the first groove is arranged on the left side in the door frame, a second groove is formed in the right side of the first hinged door, a third groove corresponding to the second groove is formed in the right side of the door frame, a telescopic assembly is arranged in the third groove, and the telescopic assembly is connected with a second clamping block matched and connected with the second groove.
Optionally, the telescopic assembly includes a driving member, the driving member is connected to the driving rod, the end of the driving rod is connected to the second clamping block, when the driving member drives the driving rod to extend, the second clamping block is clamped in the second groove, and when the driving member drives the driving rod to contract, the second clamping block is moved into the third groove.
Optionally, a pressure sensor is arranged on the first fixture block, and a normally open contact of the pressure sensor, the driving member and the power supply are connected in series.
Optionally, the driving member is a motor, an output end of the motor is connected with a lead screw, a ball is sleeved on the lead screw in a threaded manner, the ball is connected with the driving rod, and an axis of the driving rod is parallel to an axis of the lead screw.
Optionally, the lower end of the driving rod is fixedly connected with a sliding block, and a guide rail connected with the sliding block in a sliding manner is arranged in the third groove.
Optionally, the driving member is an electric telescopic push rod, and the end of the electric telescopic push rod is connected with the driving rod.
Optionally, a windproof baffle is arranged on the front side of the first hinged door, the length of the windproof baffle is greater than that of the first hinged door, and the width of the windproof baffle is greater than that of the first hinged door.
Optionally, the lower end of the first hinged door is connected with a stop block, an elastic sealing element is fixedly connected to the front side of the stop block, the elastic sealing element is a rubber strip, and a sealing groove matched and clamped with the elastic sealing element is formed in the front side of the second hinged door.
Optionally, the elastic pad is attached to the lower portion of the rear side face of the first hinged door and made of rubber.
Optionally, the end portions of the first fixture block and the second fixture block are respectively provided with a first sealing strip and a second sealing strip.
From the above, the beneficial effects of the invention are:
1. the metal door of the invention can be arranged at the stair opening, which is convenient for saving space, and is convenient for using a part of space above the stair as the room space, which is convenient for saving space, when the door is closed, the first hinged door cover is closed in the door frame, the second hinged door cover is closed above the stair opening, the first groove is internally blocked with the first block, the first hinged door cover is closed in the door frame, the telescopic component controls the second block to be blocked in the second groove, which is convenient for preventing wind and sound from transmitting to the room through the gap between the first hinged door and the door frame, when the door is opened, the first hinged door is not closed in the door frame, and the second hinged door moves close to the first hinged door under the mutual limiting action between the limiting vertical plate and the L-shaped connecting plate until the second hinged door is arranged in parallel to the first hinged door, the limiting vertical plate limits the clockwise turning degree of the L-shaped connecting plate, spacing riser and the perpendicular setting of first connecting plate, second hinged door and first hinged door parallel arrangement.
Drawings
FIG. 1 is a schematic structural view of a sealed metal door according to an embodiment of the present invention in a closed state;
FIG. 2 is a schematic view of an open state of an embodiment of a sealed metal door of the present invention;
FIG. 3 is a schematic top view of a metal door according to an embodiment of the present invention;
FIG. 4 is a schematic view of a first hinged door and a second hinged door of an embodiment of a sealed metal door according to the present invention.
In the figure: the door comprises a first hinged door 1, a second hinged door 2, a first hinged part 3, a second hinged part 4, a door frame 5, a limiting vertical plate 6, an L-shaped connecting plate 7, a first groove 8, a first clamping block 9, a second groove 10, a second clamping block 11, an elastic pad 12, a clamping block 13, a third groove 16 and a telescopic assembly 17.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
A sealed metal door comprises a door frame 5, wherein a first hinged door 1 is hinged in the door frame 5, the left side of the first hinged door 1 is hinged with the inner side wall of the door frame 5 through a first hinged part 3, a limiting vertical plate 6 is arranged below the left side of the first hinged door 1, the limiting vertical plate 6 is arranged perpendicular to a horizontal line, the limiting vertical plate 6 is arranged perpendicularly inside the door frame 5, the limiting vertical plate 6 is connected with the inner side of the door frame 5, a second hinged door 2 is hinged at the lower end of the first hinged door 1, an L-shaped connecting plate 7 is arranged on the lower end face of one side of the second hinged door 2, which is connected with the first hinged door 1, a first connecting plate of the L-shaped connecting plate 7 is connected with the second hinged door 2 in parallel, the first connecting plate and the second connecting plate are connected perpendicularly to each other, and the second connecting plate of the L-shaped connecting plate 7 is arranged perpendicular to the second hinged door 2, the L-shaped connecting plate 7 is in contact with the limiting vertical plate 6, when the first hinged door 1 is closed in the door frame 5, the L-shaped connecting plate 7 is positioned at the front side of the limiting vertical plate 6, when the first hinged door 1 is in an open state, the limiting vertical plate 6 limits the L-shaped connecting plate 7 to turn clockwise by 90 degrees, the limiting vertical plate 6 is perpendicular to the first connecting plate, the second hinged door 2 is parallel to the first hinged door 1, the left side of the first hinged door 1 is provided with a first groove 8, the left side in the door frame 5 is provided with a first fixture block 9 matched with the first groove 8, the right side of the first hinged door 1 is provided with a second groove 10, the right side in the door frame 5 is provided with a third groove 17 corresponding to the second groove 10, the third groove 17 is internally provided with a telescopic assembly 17, the telescopic assembly 17 is connected with a second fixture block 11 matched and connected with the second groove 10, the metal door of the invention can be arranged at the stair opening, which is convenient for saving space, and is convenient for using a part of space above the stair as the room space, and is convenient for saving space, when the door is closed, the first hinged door 1 covers the door frame 5, the second hinged door 2 covers the stair opening, the first groove 8 is internally blocked with the first block 9, the first hinged door 1 covers the door frame 5, the expansion component 17 controls the second block 11 to be blocked in the second groove 10, which is convenient for preventing wind and sound from transmitting to the room through the gap between the first hinged door 1 and the door frame 5, when the door is opened, the first hinged door 1 does not cover the door frame 5, and the second hinged door 2 moves close to the first hinged door 1 under the mutual restriction action between the limit vertical plate 6 and the L-shaped connecting plate 7 until the second hinged door 2 is arranged in parallel to the first hinged door 1, the L-shaped connecting plate 7 is limited by the limiting vertical plate 6 to turn 90 degrees clockwise, the limiting vertical plate 6 is perpendicular to the first connecting plate, and the second hinged door 2 is parallel to the first hinged door 1.
In order to facilitate the telescopic assembly 17 to move the second latch 11, the telescopic assembly 17 includes a driving member, the driving member is connected to the driving rod, the end of the driving rod is connected to the second latch 11, when the driving member drives the driving rod to extend, the second latch 11 is clamped in the second groove 10, and when the driving member drives the driving rod to contract, the second latch 11 moves into the third groove 16.
In order to facilitate the first hinged door 1 to be closed with the door frame 5, the second clamping block 11 is clamped in the second groove 10, the first clamping block 9 is provided with a pressure sensor, and a normally open contact of the pressure sensor, the driving member and the power supply are connected in series.
In order to facilitate the driving of the second fixture block 11 to move in a telescopic manner, the driving part is a motor, the output end of the motor is connected with a lead screw, a ball is sleeved on the lead screw in a threaded manner, the ball is connected with the driving rod, the axis of the driving rod is parallel to the axis of the lead screw, a slider is fixedly connected to the lower end of the driving rod, and a guide rail in sliding connection with the slider is arranged in the third groove 16.
In order to facilitate the driving of the second fixture block 11 to move in a telescopic manner, the driving part is an electric telescopic push rod, and the end part of the electric telescopic push rod is connected with the driving rod.
In order to further prevent wind and sound, a wind-proof baffle is arranged on the front side of the first hinged door 1, the length of the wind-proof baffle is greater than that of the first hinged door 1, the width of the wind-proof baffle is greater than that of the first hinged door 1, and the wind-proof baffle is convenient for further preventing outside sound wind from entering a room.
For the convenience of further prevent wind and prevent acoustic treatment, 1 lower extreme of first hinged door is connected with dog 13, dog 13 front side fixed connection has elastic sealing element, elastic sealing element is the rubber strip, be provided with on the second hinged door 2 with the seal groove of elastic sealing element cooperation joint, the attached cushion 12 that is connected with in 1 front surface lower part of first hinged door, cushion 12 are the rubber material.
In order to further prevent wind and sound and reduce the number of the first hinged doors 1, the end portions of the first clamping block 9 and the second clamping block 11 are respectively provided with a first sealing strip and a second sealing strip.
In order to facilitate the second hinged door 2 to be convenient for the support to the human body, people of being convenient for can stand on the second hinged door 2, be provided with a plurality of support steel poles in the second hinged door 2, the terminal surface is provided with annular fender frame under the second hinged door 2, and annular fender frame is convenient for prevent that the wind of stair mouth from passing through second hinged door 2 and ground contact bottom clearance department is not sealed, is convenient for further prevent wind and prevent acoustic treatment.
The metal door of the invention can be arranged at the stair opening, which is convenient for saving space, and is convenient for using a part of space above the stair as the room space, and is convenient for saving space, when the door is closed, the first hinged door 1 covers the door frame 5, the second hinged door 2 covers the stair opening, the first groove 8 is internally blocked with the first block 9, the first hinged door 1 covers the door frame 5, the expansion component 17 controls the second block 11 to be blocked in the second groove 10, which is convenient for preventing wind and sound from transmitting to the room through the gap between the first hinged door 1 and the door frame 5, when the door is opened, the first hinged door 1 does not cover the door frame 5, and the second hinged door 2 moves close to the first hinged door 1 under the mutual restriction action between the limit vertical plate 6 and the L-shaped connecting plate 7 until the second hinged door 2 is arranged in parallel to the first hinged door 1, the L-shaped connecting plate 7 is limited by the limiting vertical plate 6 to turn 90 degrees clockwise, the limiting vertical plate 6 is perpendicular to the first connecting plate, and the second hinged door 2 is parallel to the first hinged door 1.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the invention. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The sealing metal door is characterized by comprising a door frame (5), wherein a first hinged door (1) is hinged in the door frame (5), the left side of the first hinged door (1) is hinged with the inner side wall of the door frame (5) through a first hinged part (3), a limiting vertical plate (6) is arranged below the left side of the first hinged door (1), the limiting vertical plate (6) is perpendicular to a horizontal line, the limiting vertical plate (6) is perpendicularly arranged on the inner side of the door frame (5), the limiting vertical plate (6) is connected with the inner side of the door frame (5), the lower end of the first hinged door (1) is hinged with a second hinged door (2), an L-shaped connecting plate (7) is arranged on the lower end face of one side, connected with the first hinged door (1), of the L-shaped connecting plate (7) and the second hinged door (2) are connected in parallel, the first connecting plate and the second connecting plate are mutually vertically connected, the second connecting plate of the L-shaped connecting plate (7) is vertically arranged with the second hinged door (2), the L-shaped connecting plate (7) is in contact with the limiting vertical plate (6), when the first hinged door (1) is closed in the door frame (5), the L-shaped connecting plate (7) is positioned at the front side of the limiting vertical plate (6), when the first hinged door (1) is in an open state, the limiting vertical plate (6) limits the L-shaped connecting plate (7) to turn clockwise (90 degrees), the limiting vertical plate (6) is vertically arranged with the first connecting plate, the second hinged door (2) is parallel to the first hinged door (1), a first groove (8) is formed in the left side of the first hinged door (1), a first clamping block (9) mutually matched with the first groove (8) is arranged in the left side of the door frame (5), second recess (10) have been seted up on first hinged door (1) right side, the door frame (5) interior right side be provided with third recess (17) corresponding in second recess (10), be provided with flexible subassembly (17) in third recess (17), flexible subassembly (17) be connected with second fixture block (11) that second recess (10) cooperation is connected.
2. A sealed metal door according to claim 1, characterized in that said telescopic assembly (17) comprises a driving member, said driving member is connected to a driving rod, said driving rod is connected to said second latch (11) at an end thereof, when said driving member drives said driving rod to extend, so that said second latch (11) is latched to said second recess (10), and when said driving member drives said driving rod to retract, so that said second latch (11) moves to said third recess (16).
3. The sealed metal door as claimed in claim 2, wherein the first block (9) is provided with a pressure sensor, and the normally open contact of the pressure sensor, the driving member and the power supply are connected in series.
4. The sealed metal door as claimed in claim 2, wherein the driving member is a motor, the output end of the motor is connected with a lead screw, a ball is sleeved on the lead screw in a threaded manner, the ball is connected with the driving rod, and the axis of the driving rod is parallel to the axis of the lead screw.
5. A sealed metal door according to claim 4, characterized in that a slider is fixedly connected to the lower end of said driving rod, and a guide rail slidably connected to said slider is provided in said third groove (16).
6. The sealed metal door of claim 2, wherein said drive member is an electrically retractable push rod, said drive rod being connected to an end of said electrically retractable push rod.
7. A sealed metal door according to claim 1, characterized in that the front side of the first hinged door (1) is provided with a wind shield, the length of which is greater than the length of the first hinged door (1), and the width of which is greater than the width of the first hinged door (1).
8. The sealed metal door as claimed in claim 1, wherein a stopper (13) is connected to the lower end of the first hinged door (1), an elastic sealing member is fixedly connected to the front side of the stopper (13), the elastic sealing member is a rubber strip, and a sealing groove which is in fit clamping connection with the elastic sealing member is arranged on the second hinged door (2).
9. The door as claimed in claim 1, wherein the elastic pad (12) is attached to the lower portion of the front side of the first hinged door (1), and the elastic pad (12) is made of rubber.
10. A sealed metal door according to claim 1, characterized in that the ends of said first block (9) and said second block (11) are provided with a first sealing strip and a second sealing strip, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312774.7A CN111140151A (en) | 2019-12-18 | 2019-12-18 | Sealed metal door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312774.7A CN111140151A (en) | 2019-12-18 | 2019-12-18 | Sealed metal door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111140151A true CN111140151A (en) | 2020-05-12 |
Family
ID=70518815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911312774.7A Pending CN111140151A (en) | 2019-12-18 | 2019-12-18 | Sealed metal door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111140151A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236787A (en) * | 1997-12-17 | 1999-08-31 | Nippon Filing Kenzai Kk | Collapsible rotating door |
| CN201924769U (en) * | 2011-01-27 | 2011-08-10 | 陆军峰 | Water-draining anti-seepage high-precision airtight energy-saving sliding window |
| CN207568451U (en) * | 2017-11-24 | 2018-07-03 | 东莞市航盾消防科技有限公司 | A kind of metallic door with soundproof effect |
| CN109025730A (en) * | 2018-09-21 | 2018-12-18 | 戚周颖 | Staircase fire resistant doorsets on-off structure |
| CN109162600A (en) * | 2018-08-12 | 2019-01-08 | 吴锋 | It is a kind of for increasing the stair door of the interior space |
| CN109372402A (en) * | 2018-11-09 | 2019-02-22 | 潍坊科技学院 | A kind of medical buffer-type radiation protection sliding door of automatic-sealed |
-
2019
- 2019-12-18 CN CN201911312774.7A patent/CN111140151A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11236787A (en) * | 1997-12-17 | 1999-08-31 | Nippon Filing Kenzai Kk | Collapsible rotating door |
| CN201924769U (en) * | 2011-01-27 | 2011-08-10 | 陆军峰 | Water-draining anti-seepage high-precision airtight energy-saving sliding window |
| CN207568451U (en) * | 2017-11-24 | 2018-07-03 | 东莞市航盾消防科技有限公司 | A kind of metallic door with soundproof effect |
| CN109162600A (en) * | 2018-08-12 | 2019-01-08 | 吴锋 | It is a kind of for increasing the stair door of the interior space |
| CN109025730A (en) * | 2018-09-21 | 2018-12-18 | 戚周颖 | Staircase fire resistant doorsets on-off structure |
| CN109372402A (en) * | 2018-11-09 | 2019-02-22 | 潍坊科技学院 | A kind of medical buffer-type radiation protection sliding door of automatic-sealed |
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Application publication date: 20200512 |