Door bottom soundproofing seal

Abstract

The utility model provides door bottom sound insulation sealing device belongs to door and window sealing technical field, the utility model provides door bottom sound insulation sealing device includes fixed base, sealing structure and lift adjusting assembly. The sealing structure is embedded in the fixed base, sealing structure can move up and down along the height direction of fixed base, and sealing structure is connected with lift adjusting assembly. When the press end of lift adjusting assembly is pressed, make the sealing structure move to the outside of opening cavity with the push part, thereby lift the sealing structure out of the outside of fixed base, the sealing structure fills the gap between the bottom of sound insulation door or sound insulation window and outer frame, thereby reaches the sealing sound insulation effect, and sealing structure sets up in the opening cavity, therefore when the sealing strip is aged, only need to replace sealing structure can solve the technical problem that the sealing strip aging leads to the poor sound insulation effect.

Description

Technical Field

[0001] This utility model belongs to the field of door and window sealing technology, specifically relating to a door bottom sound insulation and sealing device. Background Technology

[0002] Soundproof doors and windows are mainly used in places with high sound insulation requirements to play a sound insulation role. Their interiors are filled with professional sound insulation materials, damping sound insulation boards, sound insulation cotton, etc.

[0003] In existing technologies, although soundproof doors or some soundproof windows are filled with sound-insulating materials, a gap usually forms between the bottom and the outer frame. Conventional sealing methods typically involve adding a sealing strip made of sponge or PU to the bottom of the outer frame. However, this sealing structure cannot guarantee a tight seal with the soundproof door or window (excessive tightness will prevent the door or window from opening and closing properly), resulting in insufficient sound insulation. Furthermore, the opening and closing of the soundproof door or window constantly agitates or touches the sealing strip, causing fatigue and shortening its lifespan. Utility Model Content

[0004] This utility model provides a door bottom sound insulation sealing device, which aims to solve the problem of poor practicality caused by the poor sound insulation effect of the sealing strip structure used in existing soundproof doors or windows.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A door bottom soundproof sealing device is provided, comprising a fixed base, a sealing structure, and a lifting and adjusting assembly. The fixed base is used for fixed connection with a soundproof door or soundproof window. The fixed base has an opening along the length of the bottom edge of the soundproof door or soundproof window, with the opening facing downwards. The sealing structure is arranged in the opening along its length. The sealing structure has a degree of freedom to move along the height direction of the fixed base. The lifting and adjusting assembly is disposed in the opening, and has a pressing end located outside the opening and a pushing part connected to the sealing structure.

[0006] When the soundproof door or window is closed, pressing the pressing end causes the pushing part to move the sealing structure to the outside of the opening.

[0007] In one possible implementation, the sealing structure includes a retaining strip and a sealing strip. The retaining strip is disposed in the opening and slidably connected to the opening along its open direction. The sealing strip is fixed to the side of the retaining strip away from the bottom surface of the opening.

[0008] In one possible implementation, the lifting and adjusting assembly includes a support, a return spring, a first connecting block, a linkage structure, and a sliding structure. The support is fixed to the bottom surface of the opening. The return spring is disposed within the opening along its length, with one end abutting against the support. The first connecting block is connected to the fixing strip. The first connecting block is the pushing portion. The linkage structure is rotatably connected to the first connecting block. The sliding structure is slidably connected to the opening along its length, with one end extending out of the opening to form the pressing end. The sliding structure has a mounting groove for storing the support and the return spring, with one inner wall of the groove abutting against the other end of the return spring. The sliding structure is connected to the linkage structure.

[0009] After the sliding structure moves into the opening, the linkage structure drives the first connecting block to push the fixing strip outward. Alternatively, after the soundproof door or window is opened, the return spring drives the sliding structure to move outward from the opening, causing the linkage structure to drive the first connecting block to pull the fixing strip back inward.

[0010] In one possible implementation, the sliding structure includes a carriage, a pressure post, and a buffer spring. The carriage is slidably connected to the opening along its length. The carriage has the mounting groove. The carriage is connected to the linkage structure. One end of the pressure post is located outside the opening, and the other end has a sliding joint that is slidably connected to one end of the carriage. The buffer spring is sleeved on the sliding joint, and its two ends abut against the pressure post and the carriage, respectively.

[0011] In one possible implementation, the carriage is provided with a receiving slot for storing the linkage structure.

[0012] In one possible implementation, the linkage structure includes a first tilting arm and a first tension spring. One end of the first tilting arm is rotatably connected to the carriage, and the other end is rotatably connected to the first connecting block. One end of the first tension spring is connected to the carriage, and the other end is connected to the first tilting arm. The first tension spring is used to continuously pull the first tilting arm, so that the first connecting block tends to move towards the bottom surface of the opening.

[0013] In one possible implementation, the door bottom soundproof sealing device is further provided with an auxiliary adjustment assembly, which includes a fastening seat, a second connecting block, a second flipping arm, and a second tension spring. The fastening seat is connected to the fixed seat. The second connecting block is connected to the fixing strip. The second connecting block is the lifting part. One end of the second flipping arm is rotatably connected to the fastening seat, and the other end is rotatably connected to the second connecting block. One end of the second tension spring is connected to the fixed seat, and the other end is connected to the second flipping arm. The second tension spring is used to continuously pull the second flipping arm, so that the second connecting block tends to move towards the bottom surface of the opening.

[0014] The second flipping arm, the first flipping arm, the fixed base, and the fixed bar are combined to form a four-bar linkage structure.

[0015] In one possible implementation, the fastening seat and the fixing seat are connected by bolts.

[0016] In one possible implementation, at least two cushioning pads are provided between the top of the fixing strip and the fixing seat.

[0017] In one possible implementation, dustproof baffles are provided on both ends of the fixing base.

[0018] This embodiment provides a door bottom soundproof sealing device. Compared with the prior art, the door bottom soundproof sealing device includes a fixed base, a sealing structure, and a lifting adjustment assembly. The sealing structure is embedded in the fixed base and can move up and down along the height direction of the fixed base. The sealing structure is also connected to the lifting adjustment assembly. When the pressing end of the lifting adjustment assembly is pressed, the pushing part drives the sealing structure to move outward of the opening, thereby lifting the sealing structure outward of the fixed base. The sealing structure fills the gap between the bottom of the soundproof door or window and the outer frame, thus achieving a sealing and soundproofing effect. Furthermore, since the sealing structure is located in the opening, when the sealing strip ages, only the sealing structure needs to be replaced to solve the technical problem of poor soundproofing caused by the aging of the sealing strip. Attached Figure Description

[0019] Figure 1 A schematic diagram of the cross-sectional structure of the fixing seat provided in an embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the cross-sectional structure of the door bottom sound insulation and sealing device provided in this embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the structure of the door bottom sound insulation and sealing device (excluding the fixing base) provided in the embodiment of this utility model;

[0022] Figure 4 for Figure 3 A magnified view of area A in the image;

[0023] Figure 5 for Figure 3 A magnified view of area B in the image;

[0024] Figure 6 for Figure 3 A magnified view of region C in the image;

[0025] Figure 7 for Figure 3 A magnified view of region D in the image;

[0026] Figure 8 A front view of the auxiliary adjustment component provided in an embodiment of this utility model;

[0027] Figure 9 This is a front view of the lifting and adjusting assembly provided in an embodiment of the present utility model;

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Fixed seat; 11. Opening mouth;

[0030] 2. Sealing structure; 21. Fixing strip; 22. Sealing strip;

[0031] 3. Lifting and adjusting assembly; 31. Support; 32. Return spring; 33. First connecting block;

[0032] 34. Linkage structure;

[0033] 341. First tilting arm; 342. First tension spring;

[0034] 35. Sliding structure;

[0035] 351. Pressing end; 352. Reservoir groove; 353. Carriage; 354. Pressure column; 355. Sliding column; 356. Buffer spring; 357. Receiving groove;

[0036] 4. Auxiliary adjustment component; 41. Fastening seat; 42. Second connecting block; 43. Second tilting arm; 44. Second tension spring;

[0037] 5. Buffer pad; 6. Dustproof baffle. Detailed Implementation

[0038] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0039] It should be further explained that the accompanying drawings and embodiments of this utility model mainly describe the concept of this utility model. Based on this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this utility model, they can implement the above-mentioned specific forms and settings in a well-known manner.

[0040] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] The terms “length,” “width,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0043] The present invention provides a door bottom sound insulation and sealing device.

[0044] Please see Figure 1 , Figure 2 and Figure 9 A door bottom soundproof sealing device includes a fixing base 1, a sealing structure 2, and a lifting adjustment assembly 3. The fixing base 1 is used for fixed connection to a soundproof door or window. The fixing base 1 has an opening 11 along the length of the bottom edge of the soundproof door or window, with the opening facing downwards. The sealing structure 2 is arranged in the opening 11 along its length. The sealing structure 2 has the freedom to move along the height of the fixing base 1. The lifting adjustment assembly 3 is disposed in the opening 11, and has a pressing end 351 located outside the opening 11, and a pushing part connected to the sealing structure 2.

[0045] When the soundproof door or window is closed, pressing the pressing end 351 causes the pushing part to move the sealing structure 2 to the outside of the opening 11.

[0046] Specifically, the bottom edge of the soundproof door or window is set parallel to the length of the opening 11.

[0047] This embodiment provides a door bottom soundproof sealing device. Compared with the prior art, the door bottom soundproof sealing device includes a fixed base 1, a sealing structure 2, and a lifting adjustment assembly 3. The sealing structure 2 is embedded in the fixed base 1 and can move up and down along the height direction of the fixed base 1. The sealing structure 2 is connected to the lifting adjustment assembly 3. When the pressing end 351 of the lifting adjustment assembly 3 is pressed, the pushing part drives the sealing structure 2 to move outward of the opening 11, thereby lifting the sealing structure 2 outward of the fixed base 1. The sealing structure 2 fills the gap between the bottom of the soundproof door or window and the outer frame, thereby achieving a sealing and soundproofing effect. Moreover, since the sealing structure 2 is set in the opening 11, when the sealing strip 22 ages, only the sealing structure 2 needs to be replaced to solve the technical problem of poor soundproofing effect caused by the aging of the sealing strip 22.

[0048] Please see Figure 2 In some embodiments, the sealing structure 2 includes a fixing strip 21 and a sealing strip 22. The fixing strip 21 is disposed in the opening 11 and is slidably connected to the opening 11 along its open direction. The sealing strip 22 is fixed to the side of the fixing strip 21 away from the bottom surface of the opening 11. The fixing strip 21 can move not only along the length direction of the opening 11 but also along the height direction of the opening 11, thereby filling the gap between the bottom of the soundproof door or window and the outer frame using the sealing strip 22, thus achieving a sealing and soundproofing effect.

[0049] When the sealing strip 22 is damaged due to aging over time, since the fixing strip 21 and the sealing strip 22 are separate, only the sealing strip 22 needs to be replaced, without the need to replace the entire sealing structure 2. This makes it easier to replace the sealing strip 22 and saves maintenance costs.

[0050] Specifically, the fixing strip 21 is provided with an insert groove for the sealing strip 22 to be fixedly connected. The sealing strip 22 is embedded in the fixing strip 21, which not only makes it easy to replace but also makes it less likely to fall off.

[0051] Please see Figures 3 to 7 , Figure 9Based on the above embodiments, the lifting adjustment assembly 3 includes a support 31, a return spring 32, a first connecting block 33, a linkage structure 34, and a sliding structure 35. The support 31 is fixed to the bottom surface of the opening 11. The return spring 32 is disposed in the opening 11 along its length, with one end abutting against the support 31. The first connecting block 33 is connected to the fixing strip 21. The first connecting block 33 is a pushing part. The linkage structure 34 is rotatably connected to the first connecting block 33. The sliding structure 35 is slidably connected to the opening 11 along its length, with one end extending out of the opening 11 to form a pressing end 351. The sliding structure 35 has a placement groove 352 for storing the support 31 and the return spring 32, with one inner wall of the placement groove 352 abutting against the other end of the return spring 32. The sliding structure 35 is connected to the linkage structure 34.

[0052] After the sliding structure 35 moves into the opening 11, the linkage structure 34 drives the first connecting block 33 to push the fixing strip 21 outward. Alternatively, after the soundproof door or window is opened, the return spring 32 drives the sliding structure 35 to move outward from the opening 11, causing the linkage structure 34 to drive the first connecting block 33 to pull the fixing strip 21 back inward.

[0053] Since the sliding structure 35 is slidably connected to the opening 11 along the length direction of the opening 11, and one end of the sliding structure 35 extends out of the opening 11 to form a pressing end 351, when the pressing end 351 of the lifting adjustment component 3 is pressed, the sliding structure 35 moves into the opening 11. Since the reset spring 32 is set in the mounting groove 352 of the sliding structure 35, and the support 31 is fixedly connected to the fixed seat 1, the sliding structure 35 squeezes the reset spring 32. At the same time, the linkage structure 34 drives the connecting block to push the fixing strip 21 outward along the height direction of the opening 11, so that the pushing part (the first connecting block 33 is the pushing part) drives the sealing structure 2 to move outward of the opening 11, thereby lifting the sealing structure 2 outward of the fixed seat 1.

[0054] Meanwhile, the reset spring 32 can also delay the response time and reduce the noise generated by the linkage structure 34 and the sliding structure 35.

[0055] When the soundproof door or window is opened, the external squeezing force of the return spring 32 disappears. Therefore, the return spring 32 drives the sliding structure 35 to reset, which causes the linkage structure 34 to drive the connecting block to pull the fixing strip 21 back inward. This achieves the automatic lifting and lowering of the sealing structure 2 on the fixed seat 1, avoiding affecting the normal opening and closing of the door and window.

[0056] Specifically, the return spring 32 can be a gas spring. A gas spring is an elastic element that uses gas and liquid as working media and utilizes the compressibility of gas to achieve elasticity. It is widely used in many fields such as machinery, automobiles, and furniture.

[0057] Compression gas spring: The most common type. When subjected to pressure, the piston rod retracts into the cylinder, generating thrust. It is used to support and lift heavy objects, such as the support gas spring in the trunk of a car.

[0058] Extension gas spring: Unlike compression gas spring, when subjected to tension, the piston rod extends to provide tension. It is often used in mechanisms that require tensioning action.

[0059] Lockable gas spring: It has a locking function and can lock the piston rod in any position to maintain a fixed position. It is suitable for occasions that require precise positioning, such as height adjustment of office chairs.

[0060] Damping gas springs: In addition to their elastic function, they also have damping characteristics, which can control the movement speed of the piston rod and reduce impact and vibration, such as the soft closing of furniture doors.

[0061] Specifically, the sliding structure 35 includes a slide 353, a pressure post 354, and a buffer spring 356. The slide 353 is slidably connected to the opening 11 along its length. The slide 353 is provided with a mounting groove 352. The slide 353 is connected to the linkage structure 34. One end of the pressure post 354 is located outside the opening 11, and the other end is provided with a sliding joint post 355 that is slidably connected to one end of the slide 353. The buffer spring 356 is sleeved on the sliding joint post 355, and its two ends abut against the pressure post 354 and the slide 353, respectively.

[0062] Since the slide 353 is slidably disposed within the opening 11 along its length, and a mounting groove 352 is provided on the slide 353, the return spring 32 is placed within the mounting groove 352. One inner wall of the mounting groove 352 abuts against the other end of the return spring 32, and a buffer spring 356 is sleeved on the sliding post 355, with both ends abutting against the pressure post 354 and the slide 353 respectively. Therefore, when the pressing end 351 is pressed, the pressure post 354 transmits the pressing force to the slide 353, thereby driving the linkage mechanism to move, which in turn drives the connecting block to push the fixing strip 21 outward. Alternatively, after the soundproof door or window is opened, the return spring 32 drives the sliding structure 35 to move outward from the opening 11, causing the linkage structure 34 to drive the connecting block to pull the fixing strip 21 back inward.

[0063] In some other embodiments, the carriage 353 is provided with a receiving slot 357 for storing the linkage structure 34. The receiving slot 357 can save the volume of the overall lifting adjustment assembly 3, thereby miniaturizing the lifting adjustment assembly 3.

[0064] Based on the above embodiment, the linkage structure 34 includes a first tilting arm 341 and a first tension spring 342. One end of the first tilting arm 341 is rotatably connected to the slide 353, and the other end is rotatably connected to the first connecting block 33. One end of the first tension spring 342 is connected to the slide 353, and the other end is connected to the first tilting arm 341. The first tension spring 342 is used to continuously pull the first tilting arm 341, so that the first connecting block 33 has a tendency to move towards the bottom surface of the opening 11.

[0065] Since one end of the first tilting arm 341 is rotatably connected to the slide 353 and the other end is rotatably connected to the first connecting block 33, when the slide 353 slides, the slide 353 drives the first tilting arm 341 to rotate, thereby causing the other end of the first tilting arm to move away from the slide 353. Furthermore, since the other end of the first tilting arm 341 is rotatably connected to the first connecting block 33, the first tilting arm 341 ultimately drives the first connecting block 33 away from the slide 353, thereby causing the fixing strip 21 to move away from the oral cavity 11, thus achieving a sealing effect. When the fixing strip 21 moves away from the oral cavity 11, the first tension spring 342 is stretched. Therefore, the first tension spring 342 allows the fixing strip 21 to be pulled inward by the first connecting block 33 when the soundproof door or window is opened.

[0066] When the width of the soundproof door or window is too wide, the bottom soundproof sealing device also includes an auxiliary adjustment component 4 to prevent the sealing structure 2 from becoming eccentric and unstable during the lifting and lowering process, which would result in poor sealing performance.

[0067] The auxiliary adjustment assembly 4 includes a fastening base 41, a second connecting block 42, a second tilting arm 43, and a second tension spring 44. The fastening base 41 is connected to the fixed base 1. The second connecting block 42 is connected to the fixing strip 21. The second connecting block 42 is a lifting part. One end of the second tilting arm 43 is rotatably connected to the fastening base 41, and the other end is rotatably connected to the second connecting block 42. One end of the second tension spring 44 is connected to the fixed base 1, and the other end is connected to the second tilting arm 43. The second tension spring 44 is used to continuously pull the second tilting arm 43, so that the second connecting block 42 tends to move towards the bottom surface of the opening 11.

[0068] The second tilting arm 43, the first tilting arm 341, the fixed seat 1 and the fixed bar 21 are combined to form a four-bar linkage structure.

[0069] Since the fastening seat 41 is connected to the fixed seat 1 and the second connecting block 42 is connected to the fixing strip 21, when the fixing strip 21 is pressed by the lifting adjustment component 3, the fixing strip 21 transmits the force to the auxiliary adjustment component 4. The second flipping arm 43, the first flipping arm 341, the fixed seat 1, and the fixing strip 21 are combined to form a four-bar linkage structure. Therefore, when the fixing strip 21 moves, the second flipping arm 43, driven by the second connecting block 42, causes the other end of the second flipping arm 43 to move away from the bottom surface of the oral cavity 11, thereby assisting in pushing the fixing strip 21 away from the bottom surface of the oral cavity 11. One end of the second tension spring 44 is connected to the fixed seat 1, and the other end is connected to the second flipping arm 43. Therefore, when the fixing strip 21 moves away from the bottom surface of the oral cavity 11, the second tension spring 44 is stretched, thus generating a rebound force. When the soundproof door or soundproof window is opened, the second tension spring 44 drives the second connecting block 42 to pull the fixing strip 21 back inward.

[0070] Specifically, the fastening base 41 and the fixing base 1 are connected by bolts. The bolt connection facilitates subsequent disassembly and installation.

[0071] Furthermore, at least two buffer pads 5 are provided between the top of the fixing strip 21 and the fixing seat 1. The buffer pads 5 are provided to prevent the fixing strip 21 from hitting the fixing seat 1 when it rebounds, thus avoiding loud noise and damage to other mechanisms.

[0072] Specifically, dustproof baffles 6 are provided on both ends of the fixing base 1. The dustproof baffles 6 can prevent dust and other debris from entering the interior of the opening 11.

[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A door bottom sound insulation and sealing device, characterized in that, include: A fixing seat for fixed connection with a soundproof door or soundproof window; the fixing seat has an opening along the length of the bottom edge of the soundproof door or soundproof window, with the opening facing downwards; A sealing structure is arranged in the opening along the length of the opening; the sealing structure has a degree of freedom to move along the height of the fixed seat. A lifting adjustment assembly is disposed in the opening, the lifting adjustment assembly having a pressing end located outside the opening and a pushing part connected to the sealing structure; When the soundproof door or window is closed, pressing the pressing end causes the pushing part to move the sealing structure to the outside of the opening.

2. The door bottom sound insulation and sealing device as described in claim 1, characterized in that, The sealing structure includes: A fixing strip is disposed in the opening and is slidably connected to the opening along the opening direction of the opening; A sealing strip is fixed to the side of the fixing strip away from the bottom surface of the opening.

3. The door bottom sound insulation and sealing device as described in claim 2, characterized in that, The lifting adjustment component includes: A support is fixed to the bottom surface of the opening; A return spring is disposed in the opening along the length of the opening, and one end of the return spring abuts against the support. The first connecting block is connected to the fixing strip; the first connecting block is the pushing part. A linkage structure is rotatably connected to the first connecting block; A sliding structure is provided along the length of the opening and is slidably connected to the opening. One end of the sliding structure extends out of the opening to form the pressing end. The sliding structure has a placement groove for storing the support and the return spring. One inner wall of the placement groove abuts against the other end of the return spring. The sliding structure is connected to the linkage structure. After the sliding structure moves into the opening, the linkage structure drives the first connecting block to push the fixing strip outward; or after the soundproof door or window is opened, the reset spring drives the sliding structure to move outward from the opening, so that the linkage structure drives the first connecting block to pull the fixing strip back inward.

4. The door bottom sound insulation and sealing device as described in claim 3, characterized in that, The sliding structure includes: A slide is slidably connected to the opening along its length; the slide is provided with the mounting groove; the slide is connected to the linkage structure. The pressure column has one end located outside the opening, and the other end is provided with a sliding column that is slidably connected to one end of the slide. A buffer spring is sleeved on the sliding joint column, and its two ends abut against the pressure column and the slide frame, respectively.

5. The door bottom sound insulation and sealing device as described in claim 4, characterized in that, The carriage is provided with a receiving slot for storing the linkage structure.

6. The door bottom sound insulation and sealing device as described in claim 4, characterized in that, The linkage structure includes: The first tilting arm has one end rotatably connected to the slide and the other end rotatably connected to the first connecting block; The first tension spring has one end connected to the slide and the other end connected to the first tilting arm. The first tension spring is used to continuously pull the first tilting arm so that the first connecting block has a tendency to move towards the bottom surface of the opening.

7. The door bottom sound insulation and sealing device as described in claim 6, characterized in that, The door bottom sound insulation and sealing device is also equipped with an auxiliary adjustment component, which includes: Fastening seat, connected to the fixed seat; The second connecting block is connected to the fixing strip; the second connecting block is a lifting part. The second tilting arm has one end rotatably connected to the fastening seat and the other end rotatably connected to the second connecting block; The second tension spring has one end connected to the fixed base and the other end connected to the second flipping arm; the second tension spring is used to continuously pull the second flipping arm, so that the second connecting block has a tendency to move towards the bottom surface of the opening. The second flipping arm, the first flipping arm, the fixed base, and the fixed bar are combined to form a four-bar linkage structure.

8. The door bottom sound insulation and sealing device as described in claim 7, characterized in that, The fastening seat and the fixing seat are connected by bolts.

9. The door bottom sound insulation and sealing device as described in claim 2, characterized in that, At least two cushioning pads are provided between the top of the fixing strip and the fixing seat.

10. The door bottom sound insulation and sealing device as described in any one of claims 1-9, characterized in that, Dustproof baffles are provided on both ends of the fixing base.

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