Sound insulation and noise reduction door assembly

Abstract

The utility model discloses a sound insulation and noise reduction door assembly which comprises a door leaf, a door cover and a door frame. The door pocket comprises a door pocket line and a door stop line, the door stop line is fixed on the door pocket line, the edge of the door pocket line is connected with the closing-up strip, and the closing-up strip is folded relative to the door pocket line; one of the two opposite side faces of the door pocket line is hinged to the door leaf, at least one of the two opposite side faces of the door pocket line is provided with a corner sealing piece, the corner sealing piece is used for being in sealing lap joint with the liftable sealing strip, and in the assembling process, the liftable sealing strip moves towards the ground relative to the door leaf. The liftable sealing strip is arranged at the lower end of the door leaf, the corner sealing piece capable of being in sealing lap joint with the liftable sealing strip is arranged at the door pocket line, the corner sealing piece can achieve the effect that the liftable sealing strip moves towards the ground, and the joint of the liftable sealing strip and the corner sealing piece is sealed; and the lower end of the liftable sealing strip can be sealed with the ground, so that the sound insulation and noise reduction effects of the door assembly are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of doors, in particular to a sound insulation and noise reduction door assembly. Background Art

[0002] An interior door is a door installed at the entrance of an indoor room. It is a general term for all room doors and can also be called a home door. Interior doors are defined by their purpose; their counterpart is an "exterior door," or entrance door—commonly known as a security door or safety door.

[0003] An interior door mainly includes a door leaf and a door frame. After the door leaf is closed in the door frame, the edge of the door leaf is sealed with the door frame, which can achieve the effect of sound insulation and noise reduction. However, there is no seal between the lower end of the existing door leaf (the end close to the ground) and the ground, which affects the sound insulation effect of the interior door on the room.

[0004] Therefore, how to provide a sound insulation and noise reduction door assembly that can seal the lower end of the door leaf and the ground to improve the sound insulation and noise reduction effect of the door assembly is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides a sound insulation and noise reduction door assembly, which can seal the lower end of the door leaf and the ground to improve the sound insulation and noise reduction effect of the door assembly.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A sound insulation and noise reduction door assembly, comprising:

[0008] A door leaf, wherein the lower end of the door leaf has a liftable sealing strip;

[0009] The door cover is used to be fixed on the door opening of the wall. The door cover includes a door cover line and a door stop line. The door stop line is fixed to the door cover line. The edge of the door cover line is connected to the closing strip, and the closing strip is folded relative to the door cover line.

[0010] One of the two opposite sides of the door frame is hinged to the door leaf, and at least one of the two opposite sides of the door frame has a corner seal, which is used to seal and overlap with the liftable sealing strip, and during the assembly process of the corner seal and the liftable sealing strip, the liftable sealing strip moves toward the ground relative to the door leaf.

[0011] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the liftable sealing strip includes:

[0012] A fixing portion, wherein the lower end of the door leaf has a groove, and the fixing portion is installed in the groove of the door leaf;

[0013] a lifting portion, the lifting portion being connected to the fixed portion via an elastic member, the corner seal being insertable between the fixed portion and the lifting portion, and the lifting portion being movable relative to the door leaf toward the ground during assembly of the corner seal and the liftable sealing strip;

[0014] The sealing portion is arranged on a side of the lifting portion away from the fixing portion and is fixedly connected to the lifting portion.

[0015] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the corner seal comprises:

[0016] A connecting plate, the connecting plate being fixed to the door casing;

[0017] A connector, which can be installed on the connecting plate in a telescopic manner along a direction perpendicular to the plane where the connecting plate is located, and the connector can be sealed and inserted between the lifting part and the fixed part; and the size of the upper end of the connector protruding from the door frame is smaller than the size of the lower end of the connector protruding from the door frame.

[0018] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the corner seals are provided on two opposite sides of the door frame, and the liftable sealing strip extends along the width direction of the door leaf to both ends of the door leaf in the width direction.

[0019] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, a step surface is formed at the door stop line and the door frame line, and the step surface for fitting with the door leaf is sealed with the door leaf through a sealing assembly.

[0020] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the sealing assembly includes:

[0021] A sealing strip, the sealing strip comprising a first section and a second section arranged in an L-shape, wherein the first section is fixed to the door stop line, the second section is fixed to the door casing line, the sealing strip has at least two sound insulation cavities, and the sealing strip is an elastic member;

[0022] A sealing baffle is fixed at a corner of the door leaf, and the sealing baffle has a sound-insulating cavity. When the door leaf is aligned with the door stop line, the sealing baffle is aligned with the sealing strip.

[0023] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the sealing strip is a rubber sealing strip, and the sealing strip is an aluminum profile.

[0024] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the first section is adhesively connected to the door stop line, the second section is adhesively connected to the door casing line, and the second section has a snap-in component, the door casing line has a slot, and the snap-in component can be snapped into the slot.

[0025] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the first section and the second section respectively have at least one sound insulation cavity.

[0026] Preferably, in the above-mentioned sound insulation and noise reduction door assembly, the door leaf comprises:

[0027] keel,

[0028] A polymer sound-absorbing panel, wherein the polymer sound-absorbing panel is filled between the keels;

[0029] A high-density sound insulation board, the high-density sound insulation board is coated on the outer surface of the keel and the polymer sound-absorbing board;

[0030] Damping sound insulation felt, the damping sound insulation felt is coated on the outer surface of the high-density sound insulation board;

[0031] A decorative plate is coated on the outer surface of the damping sound insulation felt.

[0032] Disclosed in an embodiment of the utility model is a sound-insulating and noise-reducing door assembly, which effectively improves the sound-insulating and noise-reducing effect of the door assembly by arranging a liftable sealing strip at the lower end of the door leaf and arranging a corner seal at the door frame that can be sealed and overlapped with the liftable sealing strip, and the corner seal can enable the liftable sealing strip to move toward the ground, the connection between the liftable sealing strip and the corner seal is sealed, and the lower end of the liftable sealing strip can be sealed with the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a structural diagram of a sound insulation and noise reduction door assembly disclosed in an embodiment of the present utility model;

[0035] Figure 2 This is a disassembled diagram of the sound insulation and noise reduction door assembly disclosed in an embodiment of the present utility model;

[0036] Figure 3 for Figure 2 A partial enlarged view of center C;

[0037] Figure 4 for Figure 2 A partial enlarged view of middle D;

[0038] Figure 5 for Figure 1 Cross-sectional view in the AA direction;

[0039] Figure 6 This is a partial schematic diagram of the sealing state of the liftable sealing assembly in the embodiment of the present utility model;

[0040] Figure 7 This is a schematic structural diagram of a corner seal in an embodiment of the present utility model;

[0041] Figure 8 for Figure 1 Cross-sectional view in the middle BB direction;

[0042] Figure 9 for Figure 8 A partial enlarged view of E in the middle. DETAILED DESCRIPTION

[0043] The utility model discloses a sound insulation and noise reduction door assembly, which can seal the lower end of a door leaf and the ground to improve the sound insulation and noise reduction effect of the door assembly.

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0046] An interior door is a door installed at the entrance of an indoor room. It is a general term for all room doors and can also be called a home door. Interior doors are defined by their purpose; their counterpart is an "exterior door," or entrance door—commonly known as a security door or safety door.

[0047] The interior door mainly includes a door leaf and a door frame. After the door leaf is closed in the door frame, the edge of the door leaf and the door frame are sealed to achieve the effect of sound insulation and noise reduction. However, the lower end of the existing door leaf (the end close to the ground) is not sealed from the ground to improve the sound insulation and noise reduction effect of the interior door.

[0048] Based on this, the present application discloses a sound insulation and noise reduction door assembly, in which a sealing structure is provided between the lower end of the door leaf and the ground, thereby improving the sealing effect of the door assembly and improving the sound insulation and noise reduction effect of the door assembly.

[0049] For details, see Figures 1 to 4 As shown, the sound insulation and noise reduction door assembly in the present application includes: a door leaf 100, a closing strip 200, a door frame 300 and a liftable sealing assembly 400.

[0050] The door cover 300 is used to be fixed to the door opening of the wall. The door cover 300 includes a top surface and two side surfaces opposite to each other along the width direction. The top surface is close to the upper end of the door leaf. The top surface of the door cover 300 includes but is not limited to a flat surface, and can also be a curved surface.

[0051] The door frame 300 includes a door molding 301 and a door stop molding 302. A closing strip 200 is fixed to the edge of the door molding 301 and folded over relative to the door molding 301. For example, the closing strip 200 is an L-shaped strip, with one end inserted into the edge of the door molding 301 and fixedly connected to it. The other end of the closing strip 200 is perpendicular to the door molding 301. The door molding 301 and closing strip 200 can be used to wrap around three circumferential sides of the wall at the door opening, improving the aesthetics of the door opening.

[0052] The door stop line 302 is fixed on the door frame line 301, and the door stop line 302 protrudes from the door frame line 301. The step between the door stop line 302 and the door frame line 301 is used to abut against the door leaf 100, and the door leaf 100 is sealed with the step to form a seal on the two opposite sides of the door leaf 100 along the width direction and the top surface of the door leaf 100.

[0053] One side of the door leaf 100 along the width direction is hinged to one side of the door frame 301 along the width direction. For example, the door leaf 100 and the door frame 301 are connected by a hinge, so that the door leaf 100 can rotate around the hinge to achieve the action of opening and closing the door.

[0054] like Figure 4 As shown, the lower end of the door leaf 100 has a liftable sealing strip 402, as shown in FIG. Figure 3 As shown, a corner seal 401 is provided on at least one of the two sides of the door frame 301 in the width direction. The corner seal 401 is used to seal and overlap with the liftable sealing strip 402. During the assembly process of the corner seal 401 and the liftable sealing strip 402, the liftable sealing strip 402 moves toward the ground relative to the door leaf 100.

[0055] The door assembly in the present application is achieved by arranging a liftable sealing strip 402 at the lower end of the door leaf 100, and arranging a corner seal 401 at the door frame 301 that can be sealed and overlapped with the liftable sealing strip 402, and the corner seal 401 can enable the liftable sealing strip 402 to move toward the ground, the connection between the liftable sealing strip 402 and the corner seal 401 is sealed, and the lower end of the liftable sealing strip 402 can be sealed with the ground, thereby effectively improving the sound insulation and noise reduction effect of the door assembly.

[0056] Figure 5 and Figure 6 The specific structure of the liftable sealing strip 402 is disclosed, including: a fixing portion 4021, a lifting portion 4022 and a sealing portion 4023.

[0057] The fixing portion 4021 is fixed to the door leaf 100. For example, the lower end of the door leaf 100 has a groove. It can be understood that the side of the door leaf 100 facing the door leaf 100 has a groove extending along the width direction of the door leaf 100, and the fixing portion 4021 is fixed in the groove. The connection method of the fixing portion 4021 and the groove of the door leaf 100 includes but is not limited to bonding, screw connection, or clamping. In some embodiments, the fixing portion 4021 is made of metal.

[0058] The lifting portion 4022 is connected to the fixed portion 4021 by an elastic member (not shown in the figure), and the corner seal 401 can be inserted between the fixed portion 4021 and the lifting portion 4022. Figures 5 to 6 , the lifting part 4022 moves toward the ground relative to the door leaf 100, and the sealing part 4023 moves toward the ground synchronously with the lifting part 4022 to seal the gap between the door leaf 100 and the ground. During the movement of the lifting part 4022 toward the ground relative to the door leaf 100, the distance between the lifting part 4022 and the fixing part 4021 increases. The increase in the distance between the lifting part 4022 and the fixing part 4021 will stretch the elastic part, and the elastic part will generate a restoring force. When the corner seal 401 is separated from the liftable sealing strip 402, under the action of the restoring force of the elastic part, the lifting part 4022 is reset to the position as shown in the figure. Figure 5 The initial state is shown.

[0059] In some embodiments, when the lifting portion 4022 is in its initial position, it is located within the groove, and the sealing portion 4023 is flush with the notch of the groove, recessed within the groove, or protruding from the groove. In practice, the initial position of the lifting portion 4022 can be selected based on different needs, and all positions are within the protection range. Exemplarily, the elastic member is a spring, and the sealing portion 4023 is a rubber or silicone sealing strip.

[0060] like Figure 7 As shown, the corner seal 401 includes a connecting plate 4011 and a plug-in component 4012 .

[0061] The connecting plate 4011 is fixed on the door frame 301. In some embodiments, the connecting plate 4011 is a metal plate or a wooden plate. The connection method between the connecting plate 4011 and the door frame 301 includes but is not limited to fixed connection using screws.

[0062] Connector 4012 is a plate component that is mounted on connecting plate 4011. Specifically, connector 4012 is retractable on connecting plate 4011 in a direction perpendicular to the plane of connecting plate 4011. In its initial position, connector 4012 protrudes away from connecting plate 4011. Connector 4012 is inserted between elevating portion 4022 and fixing portion 4021. Once inserted, connector 4012 seals the gap between elevating portion 4022 and fixing portion 4021. This effectively closes the gap between door leaf 100 and door casing 301, enhancing the door assembly's sound insulation and noise reduction properties.

[0063] In some embodiments, to facilitate insertion of the connector 4012 between the lifting portion 4022 and the fixing portion 4021, the upper end of the connector 4012 protrudes from the door frame 301 to a smaller extent than the lower end of the connector 4012 protrudes from the door frame 301. It should be noted that the specific dimensions of the connector 4012 can be set according to different needs and are all within the protection range.

[0064] When the connector 4012 having the above shape is inserted between the lifting portion 4022 and the fixing portion 4021 , the area of ​​the connector 4012 initially inserted between the lifting portion 4022 and the fixing portion 4021 can be reduced, which is conducive to alignment between the lifting portion 4022 and the fixing portion 4021 .

[0065] By using the liftable sealing strip 402 and corner seal 401 in this application, after the door leaf 100 is closed, the sealing portion 4023 of the liftable sealing strip 402 automatically descends and fits into the ground, isolating the flow of indoor and outdoor sound and improving the sound insulation effect of the door assembly.

[0066] In some embodiments, corner seals 401 are provided on two opposing sides of the door frame 301, and a liftable sealing strip 402 extends along the width direction of the door leaf 100 to both ends of the door leaf 100. In this manner, when the door leaf 100 rotates to align with the door frame 301, the corner seals 401 on either side of the door frame 301 overlap the liftable sealing strip 402 along both sides of the width direction of the door leaf 100, further improving the sealing effect between the door leaf 100 and the door frame 301, and further enhancing the sound insulation and noise reduction effect of the door assembly.

[0067] Combine Figure 3 、 Figure 4 as well as Figure 8 and Figure 9 As shown, a step surface is formed between the door stop line 302 and the door frame line 301. For example, the door stop line 302 is located in the middle position of the door frame line 301 along the wall thickness direction (the wall thickness direction can be understood as the thickness direction of the door assembly). The door stop line 302 will form step surfaces with the door frame line 301 on both sides along the door assembly thickness direction. After the door leaf 100 is installed on the door frame line 301, the door leaf 100 will fit with one of the step surfaces during the rotation process. Specifically, which step surface the door leaf 100 fits with is related to the installation position of the door leaf 100. The door stop line 302 can be used to limit the continued rotation of the door leaf 100, so that the door leaf 100 blocks the door space enclosed by the door frame line 301 to achieve door closing.

[0068] Based on the above description, the step surface in the embodiment of the present application, which is used to fit with the door leaf 100, is sealed and fitted with the door leaf 100 through the sealing assembly 500.

[0069] The sealing assembly 500 is used to seal the door leaf 100 and the door frame 300, thereby further improving the sound insulation and noise reduction effect of the door assembly.

[0070] In some embodiments, the sealing assembly 500 includes a sealing strip 501 and a sealing stop strip 502 .

[0071] The sealing strip 501 includes a first section and a second section arranged in an L-shape, with the first section fixed to the doorstop line 302 and the second section fixed to the door casing line 301. The first section and the doorstop line 302 may be fixed by, but not limited to, bonding, and the second section and the door casing line 301 may be fixed by, but not limited to, bonding. In some embodiments, the second section of the sealing strip 501 has a snap-fit ​​component, and the door casing line 301 has a slot, into which the snap-fit ​​component can snap. Exemplarily, the outer surface of the snap-fit ​​component has barbs that can snap into the slot. The snap-fit ​​component can be inserted into the slot, but the barbs prevent it from detaching from the slot.

[0072] The L-shaped sealing strip 501 can increase the contact area between the sealing strip 501 and the door leaf 100, thereby improving the sealing effect. The L-shaped sealing strip 501 can also increase the connection area with the door cover 300. Exemplarily, the sealing strip 501 is an elastic sealing strip, for example, a silicone strip or a rubber sealing strip.

[0073] In an optional embodiment, the sealing strip 501 has at least two sound insulation cavities. Exemplarily, the first section and the second section of the sealing strip 501 each have a sound insulation cavity. By providing the sound insulation cavity, the sound insulation effect of the sealing strip 501 can be improved.

[0074] The sealing strip 502 is fixed at the corner of the door leaf 100 and has a soundproof cavity. When the door leaf 100 is aligned with the door stop line 302, the sealing strip 502 is aligned with the sealing strip 501. When the door leaf 100 rotates to abut the step surface, the sealing strip 502 is aligned with the sealing strip 501 and squeezes the sealing strip 501, thereby increasing the stability of the sealing strip 501 and enhancing the sealing effect through the deformation of the sealing strip 501.

[0075] In some embodiments, the sealing strip 502 is an aluminum profile, and the sealing strip 502 is clipped or bonded to the door leaf 100 .

[0076] By adopting the structure of the sealing assembly 500 disclosed in this application, after the door leaf 100 is closed, the sealing strip 502 and the sealing strip 501 overlap, and the contact area is increased by the deformation of the sealing strip 501 to form three sound insulation cavities, thereby improving the sound insulation effect of the door assembly.

[0077] On the basis of the above technical solutions, combined with Figure 8 As shown, the door leaf 100 in some embodiments includes: a decorative panel 101 , a damping sound insulation felt 102 , a high-density sound insulation panel 103 , a keel 104 and a polymer sound-absorbing panel 105 .

[0078] The keel 104 is the main structure of the door leaf 100 and has a certain strength. Optionally, the keel 104 is made of solid wood or metal. The shape and size of the keel 104 can be set according to different needs and are all within the protection range.

[0079] The polymer sound-absorbing panels 105 may be filled in the gaps between the keels 104 . For example, the polymer sound-absorbing panels 105 include but are not limited to polyester fiber sound-absorbing panels.

[0080] The high-density sound insulation board 103 is coated on the outer surface of the keel 104 and the polymer sound-absorbing board 105. For example, the high-density sound insulation board 103 is made of cellulose fiber or polymer, has high density and quality, and can effectively absorb and isolate noise vibration.

[0081] The damping sound insulation felt 102 is coated on the outer surface of the high-density sound insulation board 103. The damping sound insulation felt 102 is made of elastic materials such as rubber and plastic, has high density and flexibility, and can effectively absorb and isolate noise vibration.

[0082] The decorative panel 101 is covered on the outer surface of the damping sound insulation felt 102 . The material of the decorative panel 101 includes but is not limited to solid wood board. There is no specific limitation on the shape, size, material and color of the decorative panel 101 .

[0083] The door leaf 100 in the present application uses multiple layers of sound insulation materials with different thicknesses, materials, and densities. The multi-layer combination effectively improves the sound insulation effect of the door leaf 100, thereby improving the sound insulation effect of the door assembly.

[0084] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0085] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sound insulation and noise reduction door assembly, characterized in that: include: A door leaf, wherein the lower end of the door leaf has a liftable sealing strip; The door cover is used to be fixed on the door opening of the wall. The door cover includes a door cover line and a door stop line. The door stop line is fixed to the door cover line. The edge of the door cover line is connected to the closing strip, and the closing strip is folded relative to the door cover line. One of the two opposite sides of the door frame is hinged to the door leaf, and at least one of the two opposite sides of the door frame has a corner seal, which is used to seal and overlap with the liftable sealing strip, and during the assembly process of the corner seal and the liftable sealing strip, the liftable sealing strip moves toward the ground relative to the door leaf.

2. The sound insulation and noise reduction door assembly according to claim 1, characterized in that: The liftable sealing strip comprises: A fixing portion, wherein the lower end of the door leaf has a groove, and the fixing portion is installed in the groove of the door leaf; a lifting portion, the lifting portion being connected to the fixed portion via an elastic member, the corner seal being insertable between the fixed portion and the lifting portion, and the lifting portion being movable relative to the door leaf toward the ground during assembly of the corner seal and the liftable sealing strip; The sealing portion is arranged on a side of the lifting portion away from the fixing portion and is fixedly connected to the lifting portion.

3. The sound insulation and noise reduction door assembly according to claim 2, characterized in that: The corner seal comprises: A connecting plate, the connecting plate being fixed to the door casing; A connector, which can be installed on the connecting plate in a telescopic manner along a direction perpendicular to the plane where the connecting plate is located, and the connector can be sealed and inserted between the lifting part and the fixed part; and the size of the upper end of the connector protruding from the door frame is smaller than the size of the lower end of the connector protruding from the door frame.

4. The sound insulation and noise reduction door assembly according to claim 2, characterized in that: The corner seals are provided on two opposite sides of the door frame, and the liftable sealing strip extends along the width direction of the door leaf to both ends of the door leaf in the width direction.

5. The sound insulation and noise reduction door assembly according to claim 1, characterized in that: A step surface is formed at the door stop line and the door frame line, and the step surface used to fit with the door leaf is sealed and fitted with the door leaf through a sealing component.

6. The sound insulation and noise reduction door assembly according to claim 5, characterized in that: The sealing assembly comprises: A sealing strip, the sealing strip comprising a first section and a second section arranged in an L-shape, wherein the first section is fixed to the door stop line, the second section is fixed to the door casing line, the sealing strip has at least two sound insulation cavities, and the sealing strip is an elastic member; A sealing baffle is fixed at a corner of the door leaf, and the sealing baffle has a sound-insulating cavity. When the door leaf is aligned with the door stop line, the sealing baffle is aligned with the sealing strip.

7. The sound insulation and noise reduction door assembly according to claim 6, characterized in that: The sealing strip is a rubber sealing strip, and the sealing baffle is an aluminum profile.

8. The sound insulation and noise reduction door assembly according to claim 6, characterized in that: The first section is bonded to the door stop line, the second section is bonded to the door casing line, and the second section has a clamping piece, the door casing line has a clamping groove, and the clamping piece can be clamped into the clamping groove.

9. The sound insulation and noise reduction door assembly according to claim 6, characterized in that: The first section and the second section each have at least one sound insulation cavity.

10. The sound insulation and noise reduction door assembly according to any one of claims 1 to 9, characterized in that: The door leaf comprises: keel, A polymer sound-absorbing panel, wherein the polymer sound-absorbing panel is filled between the keels; A high-density sound insulation board, the high-density sound insulation board is coated on the outer surface of the keel and the polymer sound-absorbing board; Damping sound insulation felt, the damping sound insulation felt is coated on the outer surface of the high-density sound insulation board; A decorative plate is coated on the outer surface of the damping sound insulation felt.

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