Door bottom sealing device

Abstract

The utility model relates to the field of door bottom sealing, in particular to a door bottom sealing device. Comprising a shell, a lifting frame is arranged in the shell, and a rubber strip is installed at the bottom end of the lifting frame; a pushing plate is arranged in the shell, and sliding bolts are connected to the two ends of the pushing plate in a sleeving mode; the ends, away from the pushing plate, of the sliding bolts are in threaded connection with adjusting nuts, cushion blocks are arranged at the other ends of the adjusting nuts, and first springs are arranged between the cushion blocks and the pushing plate. The bottom end of the pushing plate is fixedly connected with a third connecting block, and a third connecting shaft is arranged on the third connecting block. The door bottom sealing device is installed at the bottom of a door, the rubber strip is stored in the initial state, the device can enable the rubber strip to automatically stretch out when the door is closed, the door bottom sealing function is achieved, rubber strip abrasion caused by ground friction is effectively avoided, and therefore the service life of the device is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of door bottom sealing, in particular to a door bottom sealing device. Background Art

[0002] When a door is closed, there's a gap between it and the floor. If a fire breaks out, smoke can get in through the gap. Because this gap is unavoidable, a sealing device is typically installed at the bottom of the door to provide smoke, fire, heat, cold, sound, dust, water, insect protection, and a seal between the room and the outside world.

[0003] A search revealed the publication number CN205445414U, published on August 10, 2016. The document discloses a highly airtight door bottom sealing device comprising a housing with an opening at the bottom, and a sealing assembly disposed within the housing near the opening. The housing comprises a mounting seat, on which a drive assembly is mounted. The sealing assembly is connected to the drive assembly and is driven to extend and retract by the drive assembly. A top cover is disposed at the top of the housing. This door bottom sealing device offers various installation options. It can be mounted directly on the side of the door's lower portion. Due to the beveled top cover, the top cover does not interfere with the exterior, creating an aesthetically pleasing and non-obtrusive appearance. After removing the top cover, it can be installed in a groove defined in the door's lower portion, enabling fully or semi-concealed installation. This door bottom sealing device utilizes a modular design, primarily comprising the housing, drive assembly, and sealing assembly. Assembly is simple, and for later maintenance and repair, the entire sealing device does not need to be disassembled; only the corresponding components need to be removed for replacement.

[0004] Although the above structure can seal the gap between the bottom end of the indoor door and the ground, since the sealing component is installed at the bottom of the door and cannot be retracted, the sealing component is always in a state of friction with the ground when the door is opened or closed, which affects the service life of the device. At the same time, the friction force of the ground affects the smoothness of opening and closing the door. Utility Model Content

[0005] In response to the above problems, the present invention provides a door bottom sealing device, which includes a housing, a lifting frame disposed within the housing, and a rubber strip mounted at the bottom end of the lifting frame;

[0006] A push plate is provided in the housing, and sliding bolts are sleeved on both ends of the push plate;

[0007] One end of a group of sliding bolts away from the push plate is threadedly connected to an adjusting nut, the other end of the adjusting nut is provided with a pad, and a first spring is provided between the pad and the push plate;

[0008] The bottom end of the push plate is fixedly connected to a third connecting block, and the third connecting block is provided with a third connecting shaft;

[0009] A linkage plate is fixedly connected to the lifting frame. A first connecting shaft is arranged on the linkage plate. Two groups of connecting pieces are rotatably connected to the first connecting shaft. A second connecting shaft is rotatably connected between the two groups of connecting pieces. One end of one group of connecting pieces is rotatably connected to a third connecting shaft.

[0010] Furthermore, the first spring is sleeved on one group of sliding bolts. One end of the other group of sliding bolts is fixedly connected to a second connecting block, and the second connecting block is fixedly connected to the pushing plate.

[0011] Furthermore, first side plates and second side plates are respectively arranged at both ends of the outer shell. The cushion block is arranged at one end close to the second side plate, and the cushion block extends to the outside of the outer shell.

[0012] Furthermore, the bottom end of the pushing plate is fixedly connected to a first connecting block. A pushing block is sleeved on the first connecting block. A clamping bolt is threadedly connected between the pushing block and the first connecting block. The pushing block is in active contact with the third connecting block.

[0013] Furthermore, a second spring is arranged between the pushing block and the first connecting block. The third connecting block is in active contact with the pushing block.

[0014] Furthermore, two magnet fixing blocks are arranged at the bottom end of the pushing plate. Magnets are installed on both of the two magnet fixing blocks. The magnets are arranged directly above the lifting frame.

[0015] Furthermore, two magnetic attraction pieces are fixedly connected to the lifting frame. The two magnetic attraction pieces respectively correspond to the two magnets one by one, and the two magnetic attraction pieces respectively attract the corresponding magnet.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. By installing this bottom door sealing device at the bottom of the door, in the initial state, the rubber strip is stored. When closing the door, the cushion block contacts the door frame, causing the door frame to exert an extrusion force on the cushion block, thereby extruding the first spring and the second spring. Under the thrust of the pushing block, the two groups of connecting pieces are switched from the closed state to the unfolded state, so that the lifting frame drives the rubber strip to move downward to the outside of the outer shell, realizing the sealing effect on the bottom of the door. This device can store the rubber strip when the door is in the open state and automatically extend the rubber strip when the door is in the closed state, realizing the function of bottom door sealing, effectively avoiding the wear of the rubber strip caused by ground friction during the process of opening and closing the door, and thus effectively extending the service life of the device.

[0018] 2. By setting the magnetic attraction sheet and the magnet, only when the door is close to the fully closed state, the cushion block gradually approaches the second side plate, causing the elastic potential energy of the second spring and the first spring to gradually increase until it is greater than the attraction force between the magnetic attraction sheet and the magnet. Then, the two sets of connecting pieces are switched from the closed state to the unfolded state under the thrust of the pushing block, and the magnetic attraction sheet is separated from the magnet. As a result, a set of connecting pieces fixedly connected to the linkage plate push the linkage plate downward to extend the rubber strip. This device will only extend the rubber strip for bottom sealing of the door when the door is close to the fully closed state. During the door opening process, when the door is just opened, the rubber strip can be quickly retracted by the attraction force between the magnetic attraction sheet and the magnet, effectively avoiding the premature extension and late retraction of the rubber strip, which may cause friction between the rubber strip and the ground and affect the smoothness of opening and closing the door.

[0019] Other features and advantages of the present utility model will be described in the subsequent specification, and, in part, will be obvious from the specification, or can be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the specification, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Shows an exploded schematic view of the main structure according to an embodiment of the present utility model;

[0022] Figure 2 Shows according to an embodiment of the present utility model Figure 1 Enlarged schematic view at A;

[0023] Figure 3 Shows a cross-sectional view of a partial internal structure of the main body according to an embodiment of the present utility model;

[0024] Figure 4 Shows according to an embodiment of the present utility model Figure 1 Enlarged schematic view at B.

[0025] In the figure: 1. Outer shell; 2. Lifting frame; 3. Pushing plate; 4. Rubber strip; 5. First connecting block; 6. Connecting piece; 7. Magnetic sheet; 8. Magnet fixing block; 9. Magnet; 10. Second connecting block; 11. Third connecting block; 12. Pushing block; 13. Stopper; 14. Adjusting nut; 15. First side plate; 16. Second side plate; 17. Spacer block; 18. First connecting shaft; 19. Second connecting shaft; 20. Third connecting shaft; 21. Slide bolt; 22. First spring; 23. Second spring; 24. Clamping bolt; 25. Linking plate. Detailed implementation manner

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] An embodiment of the present utility model provides a door bottom sealing device, including an outer shell 1, for example, as Figures 1-4 shown.

[0028] First side plates 15 and second side plates 16 are respectively provided at both ends of the outer shell 1. A lifting frame 2 is arranged inside the outer shell 1. Stoppers 13 are arranged at both ends of the lifting frame 2. A rubber strip 4 is installed at the bottom end of the lifting frame 2. The rubber strip 4 is arranged between the two groups of stoppers 13;

[0029] A pushing plate 3 is arranged inside the outer shell 1. The pushing plate 3 is movably attached to the inner wall top of the outer shell 1. Slide bolts 21 are sleeved at both ends of the pushing plate 3. One end of a group of slide bolts 21 away from the pushing plate 3 is threadedly connected with an adjusting nut 14. A spacer block 17 is arranged at the other end of the adjusting nut 14. A first spring 22 is arranged between the spacer block 17 and the pushing plate 3. The first spring 22 is sleeved on the slide bolt 21. One end of the other group of slide bolts 21 is fixedly connected with a second connecting block 10. The second connecting block 10 is fixedly connected to the pushing plate 3;

[0030] A first connection block 5 is fixedly connected to the bottom end of the push plate 3. A push block 12 is sleeved on the first connection block 5. A clamping bolt 24 is threadedly connected between the push block 12 and the first connection block 5. A second spring 23 is arranged between the push block 12 and the first connection block 5. A third connection block 11 is fixedly connected to the bottom end of the push plate 3. The third connection block 11 is in active contact with the push block 12. A third connection shaft 20 is provided on the third connection block 11. A linkage plate 25 is fixedly connected to the lifting frame 2. A first connection shaft 18 is arranged on the linkage plate 25. Two connecting pieces 6 are rotatably connected to the first connection shaft 18. A second connection shaft 19 is rotatably connected between the two connecting pieces 6. The top end of one of the connecting pieces 6 is rotatably connected to the third connection shaft 20;

[0031] Two magnet fixing blocks 8 are arranged at the bottom end of the push plate 3. Magnets 9 are installed on both of the two magnet fixing blocks. Two magnetic attraction pieces 7 are fixedly connected to the lifting frame 2. The two magnetic attraction pieces 7 correspond to the two magnets 9 one by one, and the two magnetic attraction pieces 7 are respectively attracted to the corresponding one of the two magnets 9.

[0032] Working principle

[0033] By installing this bottom door sealing device at the bottom of the door, in the initial state, due to the elastic potential energy of the first spring 22, the cushion block 17 extends to the outside of the housing 1. The two magnetic attraction pieces 7 are attracted to the two magnets 9, so that the lifting frame 2 drives the rubber strip 4 to be received inside the housing 1. At this time, the included angle between the two connecting pieces 6 is small, and the two connecting pieces 6 are in a closed state.

[0034] When closing the door, the cushion block 17 contacts the door frame, so that the door frame generates a squeezing force on the cushion block 17, thereby squeezing the first spring 22, causing the first spring 22 to drive the push plate 3 to move away from the cushion block 17, so that the first connection block 5 squeezes the second spring 23, so that the push block 12 moves towards the third connection block 11, exerting a squeezing effect on one of the connecting pieces 6. When the door is close to the fully closed state, the cushion block 17 gradually approaches the second side plate 16, so that the elastic potential energy of the second spring 23 and the first spring 22 gradually increases until it is greater than the attraction between the magnetic attraction piece 7 and the magnet 9. The two connecting pieces 6 are switched from the closed state to the unfolded state under the thrust of the push block 12, and the magnetic attraction piece 7 and the magnet 9 are separated from each other. Thus, one of the connecting pieces 6 fixedly connected to the linkage plate 25 pushes the linkage plate 25 to move downward, that is, the lifting frame 2 drives the rubber strip 4 to move downward to the outside of the housing 1, realizing the sealing effect on the bottom of the door.

[0035] When the door closing operation is performed, the door drives the door bottom sealing device to rotate, causing the cushion block 17 to move synchronously. During the process that the cushion block 17 gradually disengages from the door frame, the elastic potential energy of the first spring 22 and the second spring 23 gradually decreases. When it is smaller than the attraction force between the magnetic sheet 7 and the magnet 9, the magnetic sheet 7 and the magnet 9 attract each other, causing the two groups of connecting pieces 6 to reset to the closed state, that is, driving the lifting frame 2 to move upward into the housing 1 to realize the storage of the rubber strip 4. At the same time, due to the tension of the first spring 22 and the second spring 23, the push plate 3 and the cushion block 17 are driven to reset.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Door bottom sealing device, comprising a housing (1), characterized in that: A lifting frame (2) is arranged inside the housing (1), and a rubber strip (4) is installed at the bottom end of the lifting frame (2). A push plate (3) is arranged inside the housing (1), and sliding bolts (21) are sleeved at both ends of the push plate (3). One end of a group of the sliding bolts (21) far away from the push plate (3) is threadedly connected with an adjusting nut (14), a cushion block (17) is arranged at the other end of the adjusting nut (14), and a first spring (22) is arranged between the cushion block (17) and the push plate (3). The bottom end of the push plate (3) is fixedly connected with a third connecting block (11), and a third connecting shaft (20) is arranged on the third connecting block (11). A linkage plate (25) is fixedly connected to the lifting frame (2), a first connecting shaft (18) is arranged on the linkage plate (25), two groups of connecting pieces (6) are rotatably connected to the first connecting shaft (18), a second connecting shaft (19) is rotatably connected between the two groups of connecting pieces (6), and one end of a group of the connecting pieces (6) is rotatably connected to the third connecting shaft (20).

2. The bottom door sealing device according to claim 1, characterized in that: The first spring (22) is sleeved on a group of the sliding bolts (21), one end of the other group of the sliding bolts (21) is fixedly connected with a second connecting block (10), and the second connecting block (10) is fixedly connected to the push plate (3).

3. The bottom door sealing device according to claim 2, characterized in that: A first side plate (15) and a second side plate (16) are respectively arranged at both ends of the housing (1), the cushion block (17) is arranged at one end close to the second side plate (16), and the cushion block (17) extends to the outside of the housing (1).

4. The door bottom sealing device according to claim 2, characterized in that: The bottom end of the push plate (3) is fixedly connected with a first connecting block (5), a push block (12) is sleeved on the first connecting block (5), a clamping bolt (24) is threadedly connected between the push block (12) and the first connecting block (5), and the push block (12) is in movable contact with the third connecting block (11).

5. The door bottom sealing device according to claim 4, characterized in that: A second spring (23) is arranged between the push block (12) and the first connecting block (5), and the third connecting block (11) is in movable contact with the push block (12).

6. The bottom door sealing device according to claim 4, characterized in that: Two groups of magnet fixing blocks (8) are arranged at the bottom end of the push plate (3), magnets (9) are installed on the two groups of magnet fixing blocks (8), and the magnets (9) are arranged directly above the lifting frame (2).

7. The bottom door sealing device according to claim 6, characterized in that: Two groups of magnetic attraction sheets (7) are fixedly connected to the lifting frame (2), the two groups of magnetic attraction sheets (7) respectively correspond to the two groups of magnets (9) one by one, and the two groups of magnetic attraction sheets (7) are respectively attracted to the corresponding group of magnets (9).

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