CN219081436U - Sealing device for gap under door - Google Patents

Abstract

The utility model discloses a sealing device for a gap under a door, and belongs to the technical field of sealing. Comprising the following steps: the mounting piece is provided with a mounting groove at one side, a rotating fulcrum is arranged at the notch of the mounting groove, and the mounting piece is provided with a connecting part for interconnecting with the door panel; the balance piece is provided with a limiting end and a holding end, the holding end is positioned in the mounting groove, the limiting end extends out of the mounting groove so that the middle part of the balance piece can rotate around a rotation pivot, the limiting end is fixed with a sealing strip, and the sealing strip is of a strip-shaped structure made of flexible materials; the blocking piece is used for acting on the limiting end and enabling the balance piece to rotate when the door plate is closed, so that the sealing strip seals the gap under the door when the door plate is closed in place; wherein, the balancing piece can be along the rotation axis direction of rotation fulcrum flexible. According to the utility model, the telescopic balancing piece is arranged, so that a user can conveniently adjust the length of the balancing piece according to actual use requirements, and the convenience of use is improved.

Description

Sealing device for gap under door

Technical Field

The utility model relates to the technical field of sealing, in particular to a sealing device for a gap under a door.

Background

When current door plant is opened and shut, in order to open and shut conveniently, there is the clearance between door plant lower extreme and the ground, avoid door plant lower extreme and ground to form the friction, influence the opening and shutting of door plant, but this clearance can lead to the whole unable completion of room sealed, to having the occasion of giving sound insulation, preventing wind the demand, or other occasions that need the higher leakproofness of room, the clearance under the door can lead to the whole sealed failure of room, influence the use, have the sealing device who is used for the gap under the door among the prior art, but when using, sealing device's length needs to customize according to the width of door plant, the suitability is poor, leads to using inconveniently.

Disclosure of Invention

The utility model aims to provide a sealing device for a gap under a door, and by arranging a telescopic balancing piece, a user can conveniently adjust the length of the balancing piece according to actual use requirements without customizing, and the convenience of use is improved.

The utility model is realized by the following technical scheme:

a sealing device for an under door gap, comprising: the mounting piece is provided with a mounting groove at one side, a rotating fulcrum is arranged at the notch of the mounting groove, and the mounting piece is provided with a connecting part for interconnecting with the door panel; the balance piece is provided with a limiting end and a holding end, the holding end is positioned in the mounting groove, the limiting end extends out of the mounting groove so that the middle part of the balance piece can rotate around a rotation pivot, the limiting end is fixed with a sealing strip, and the sealing strip is of a strip-shaped structure made of flexible materials; the blocking piece is used for acting on the limiting end and enabling the balance piece to rotate when the door plate is closed, so that the sealing strip seals the gap under the door when the door plate is closed in place; wherein, the balancing piece can be along the rotation axis direction of rotation fulcrum flexible.

In the above technical scheme, when the balancing piece can rotate around the rotation pivot, the position change of the sealing strip can be realized, after the door plate is closed in place, the blocking piece drives the limiting end to rotate to a proper position, so that the sealing strip on the limiting end fills the gap under the door, the sealing of a room is completed, the length of the balancing piece can be adapted to the width of different door plates by arranging the telescopic balancing piece, the sealing strip connected with the limiting end of the balancing piece is generally made of flexible materials, and the sealing strip can be directly cut according to the width of the door plate, so that the sealing of the gap under the door is completed by adapting the length of the balancing piece.

Further, the balancing piece is including the first balancing piece and the second balancing piece that slide the setting, first balancing piece one end is the holding end, the other end is the spacing end, first balancing piece rotation overlap joint is on the fulcrum of rotation, the second balancing piece is located one side that first fulcrum was kept away from to first balancing piece, the tip and the sealing strip fixed connection of installing piece are kept away from to the second balancing piece, first balancing piece can revolute the fulcrum of rotation and rotate, the second balancing piece is the extension of first balancing piece, form the support to the sealing strip for the sealing strip can be accurate seal the gap under the door.

Further, the first balance piece has the corner structure, corner structure rotation overlap joint is on the rotation fulcrum, corner structure one end is the holding end, the other end is the spacing end, the holding end is fixed with the weight piece, the weight piece can drive first balance piece and revolute the rotation fulcrum rotation for the spacing end rotates towards the direction that is close to the installed part, when the spacing end did not cooperate with the barrier, because the existence of weight piece, make the spacing end keep away from the ground of door plant below, thereby avoid the door plant to open and shut, when spacing end and barrier the separation of barrier, the sealing strip forms the friction with ground, lead to the condition of switch door difficulty.

Further, one side of the corner structure, which is far away from the rotation pivot, is provided with a limiting protrusion, when the first balance piece rotates around the rotation pivot, the limiting protrusion is used for limiting the first balance piece to separate from the notch of the mounting groove, and the limiting protrusion is always positioned in the mounting groove and cannot separate from the mounting groove, so that the situation that the corner structure directly drops out of the notch of the mounting groove when the rotation amplitude of the balance piece on the rotation pivot is overlarge is avoided.

Further, the balancing piece is provided with at least one first balancing piece and at least one second balancing piece, and the at least one first balancing piece and the at least one second balancing piece are arranged at intervals in sequence.

Further, the sealing strip is located one side of the limiting end far away from the rotating fulcrum.

Further, the mounting piece can stretch out and draw back along the rotation axis direction of the rotation fulcrum, the length of the mounting piece can be changed, the balancing piece is contained, the situation that the balancing piece is exposed outside singly and is easy to shift under the action of external force is avoided.

Further, the mounting piece includes sliding connection's first mounting piece and second mounting piece, the mounting groove sets up in first mounting piece one side, when second mounting piece slip cap is established outside first mounting piece, second mounting piece one side has the first opening that supplies the balancing piece to pass, connecting portion is located the second mounting piece, when second mounting piece slides in the mounting groove of first mounting piece, the second mounting piece has the second mounting groove that supplies the balancing piece pivoted, keep the end to be arranged in the second mounting groove, spacing end stretches out second mounting groove and mounting groove in proper order, connecting portion is located first mounting piece, first mounting piece rotates with the balancing piece to be connected, the second mounting piece is as the extension of first mounting piece, form the protection to the balancing piece together with first mounting piece, prevent the impaired condition of balancing piece.

Further, the mounting member has at least one first mounting member and at least one second mounting member, the at least one first mounting member and the at least one second mounting member being separately spaced apart in sequence.

Further, the first mounting member and the second mounting member are fixedly connected by glue or screws.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

according to the utility model, the telescopic balancing piece is arranged, so that the balancing piece can be adjusted according to the width of the door plate, and the gap under the door is sealed; the balance piece is used as a supporting structure of the sealing strip, can assist the sealing strip to be accurately positioned at the gap under the door, and avoids the phenomenon that the independent sealing strip is damaged by rolling; the telescopic balancing piece improves the application range of the sealing device and improves the use convenience of the sealing device.

Drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a side view of an embodiment of the present utility model with an inner opening door mounting structure;

FIG. 2 is a top view of an embodiment of the present utility model and a mounting structure for an out-opening door;

FIG. 3 is a side view of a first mounting member sleeved outside a second mounting member according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a mounting structure according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a balance member according to an embodiment of the utility model.

In the drawings, the reference numerals and corresponding part names:

1-mounting part, 11-mounting groove, 12-rotation pivot, 13-connecting part, 14-first mounting part, 15-second mounting part, 16-second mounting groove, 2-balance part, 21-limit end, 22-holding end, 23-first balance part, 24-second balance part, 25-rotation angle structure, 3-sealing strip, 4-blocking part, 5-weight part, 6-limit bulge and 7-screw.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the utility model. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the utility model.

Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the utility model. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the present utility model, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

Examples

The utility model patent of China with the application number of 2022204962570 provides a sealing device for a lower opening of a door, and the patent and the application are products of the same inventor, and the patent products find that the lengths of a mounting piece 1 and a balancing piece 2 cannot be matched with all widths of the door plates in actual use, and the sealing device is required to be customized according to the widths of the door plates and is inconvenient to use.

The sealing device for an under-door gap provided in this embodiment, as shown in fig. 1 to 4, includes: the door panel comprises a mounting piece 1, wherein a mounting groove 11 is formed in one side of the mounting piece 1, a rotating fulcrum 12 is arranged at a notch of the mounting groove 11, and the mounting piece 1 is provided with a connecting part 13 for being connected with the door panel; the balance piece 2 is provided with a limit end 21 and a holding end 22, the holding end 22 is positioned in the mounting groove 11, the limit end 21 extends out of the mounting groove 11 so that the middle part of the balance piece 2 can rotate around the rotation pivot 12, the limit end 21 is fixed with the sealing strip 3, and the sealing strip 3 is of a strip-shaped structure made of flexible materials; the blocking piece 4 is used for acting on the limiting end 21 and enabling the balance piece 2 to rotate when the door plate is closed, so that when the door plate is closed in place, the sealing strip 3 seals a gap under the door; wherein the balance 2 is retractable along the rotation axis direction of the rotation fulcrum 12.

When the sealing device is in actual use, the mounting piece 1 is mounted on a door plate, the balance piece 2 can rotate around the rotation pivot 12 to realize the position change of the sealing strip 3, the middle part of the balance piece 2 refers to any position between the limiting end 21 and the holding end 22, and not to the middle position, after the door plate is closed in place, the blocking piece 4 drives the limiting end 21 to rotate to a proper position, so that the sealing strip 3 on the limiting end 21 is positioned at the gap between the door plate and the ground, the sealing strip 3 seals the gap under the door, wherein the balance piece 2 supports the sealing strip 3, so that the sealing strip 3 can accurately seal the gap under the door, the sealing strip 3 is made of a flexible material and can fully seal the gap under the door, and the sealing strip 3 can also be made of sound insulation materials and sound insulation sponge to play a sound insulation role; the whole telescopic structure that is of balancing piece 2, when the installation, the user adjusts the length of balancing piece 2 according to the width of installation door plant, then cuts the length of the sealing strip 3 that corresponds, the door of adaptation not unidimensional, installation piece 1 is used for installing with the door plant, installation piece 1 supports balancing piece 2 wholly, stop piece 4 setting is in the terminal point department of the closed route of door plant, be located door frame next door or subaerial, set up usually next door frame, do not influence user's walking, wherein, need pay attention to the direction when installation piece 1 makes balancing piece 2 rotate with the whole back balancing piece 2 of stopping piece 4 contact, make sealing strip 3 seal the gap under the door.

The structure of the balance member 2 is shown in fig. 5, the first balance member 23 and the second balance member 24 are slidably arranged in a protecting manner, one end of the first balance member 23 is a holding end 22, the other end is a limiting end 21, the first balance member 23 is rotationally lapped on the rotating pivot 12, the first balance member 23 is mainly rotationally connected with the mounting member 1, the second balance member 24 is located at one side, far away from the first pivot, of the first balance member 23, the end, far away from the mounting member 1, of the second balance member 24 is also a limiting end 21, the end is fixedly connected with the sealing strip 3, the second balance member 24 is an extension part of the first balance member 23, the sealing strip 3 is fixed at the end, far away from the mounting member 1, of the limiting end 21 of the first balance member 23 and the end, far away from the second balance member 24, of the first balance member 23 can rotate around the rotating pivot 12, and the second balance member 24 and the first balance member 23 jointly form a support for the sealing strip 3, so that the gap under the door can be accurately sealed.

In order to stabilize the lap joint type rotation connection structure of the first balance piece 23 and the mounting end, the first balance piece 23 is provided with a corner structure 25, the corner of the corner structure 25 is the middle part of the first balance piece 23, the corner structure 25 is rotationally lapped on the rotation pivot 12, one end of the corner structure 25 is a holding end 22, the other end is a limiting end 21, the holding end 22 is fixedly provided with a weight piece 5, the weight piece 5 can drive the first balance piece 23 to rotate around the rotation pivot 12, the limiting end 21 rotates towards the direction close to the mounting piece 1, and when the limiting end 21 is not matched with the blocking piece 4, the limiting end 21 is far away from the ground below the door panel due to the existence of the weight piece 5, so that the situation that the door panel is opened and closed, and when the limiting end 21 is separated from the blocking piece 4, the sealing strip 3 rubs with the ground, and the door opening and closing are difficult is avoided; when the limiting end 21 contacts with the door plate, the balance piece 2 rotates, so that the height of the weight piece 5 is increased, when the limiting end 21 is separated from the door plate, due to the existence of the weight piece 5, the weight of the weight piece 5 rotates, the height of the weight piece 5 is reduced, the height of the limiting end 21 is increased, the limiting end 21 is far away from the ground, the weight piece 5 is generally made of a strip-shaped structure made of a material with high density, the weight piece 5 can be made of a metal material, wood or plastic, or a bulge arranged on the balance piece 2 is directly arranged, and the weight of the holding end 22 is increased.

The corner structure 25 is provided with spacing protruding 6 far away from one side of the rotation fulcrum 12, when first balancing piece 23 revolutes rotation fulcrum 12 and rotates, spacing protruding 6 is arranged in limiting first balancing piece 23 and breaks away from the notch of mounting groove 11, spacing protruding 6 is in mounting groove 11 always, can not break away from mounting groove 11, thereby avoided balancing piece 2 when the rotation range is too big on rotation fulcrum 12, corner structure 25 directly falls out from the notch of mounting groove 11, in this embodiment, the position of spacing protruding 6 is as shown in fig. 2 and 5, spacing protruding 6 is the structure that corner department or the both sides department of corner structure 25 are towards the protruding formation in direction of keeping away from rotation fulcrum 12.

After the user adjusts the lengths of the first balance member 23 and the second balance member 24 to a proper position and determines the length of the balance member 2, the first balance member 23 and the second balance member 24 can be fixedly connected by using adhesive, the adhesive is convenient to use and low in cost, and in other embodiments, a buckle or screw structure can be selected for fixing.

The balance member 2 has at least one first balance member 23 and at least one second balance member 24, and the at least one first balance member 23 and the at least one second balance member 24 are separately arranged in sequence at intervals; the separate interval arrangement in turn means that only one second balance piece 24 is arranged between the two first balance pieces 23 or only one first balance piece 23 is arranged between the two second balance pieces 24, the number of the first balance pieces 23 and the second balance pieces 24 can be selected according to actual requirements, when the balance pieces are used regularly, the balance pieces 2 can be adjusted to be in proper length positions by using one second balance piece 24, when the required balance pieces 2 are longer in length, the two second balance pieces 24 can be selected to be used, the two second balance pieces 24 are respectively positioned at two sides of the first balance pieces 23 and are in sliding connection with the first balance pieces 23, and the length of the balance pieces 2 is adjusted, so that the length adjustment range of the balance pieces 2 is wider; in other embodiments, two first balancing members 23 may be selectively located on two sides of the second balancing member 24 to adjust the length of the balancing member 2, and a plurality of first balancing members 23 and a plurality of second balancing members 24 may be selectively spaced to increase the length of the balancing member 2.

The sealing strip 3 is installed in the side that the limit end 21 kept away from the rotation fulcrum 12, and when limit end 21 contacted with stop 4, the side that limit end 21 did not install sealing strip 3 contacted with stop 4, avoided sealing strip 3 to be located between limit end 21 and stop 4 and receive the extrusion.

For the aesthetic property of the whole sealing device and better suitability, the installation piece 1 can also stretch and retract along the rotation axis direction of the rotation pivot 12, the length of the installation piece 1 can also be changed, the balance piece 2 is accommodated, the balance piece 2 is prevented from being exposed outside independently, and the balance piece 2 is prevented from being easily displaced under the action of external force.

The structure of the mounting piece 1 is shown in fig. 4, the mounting piece 1 comprises a first mounting piece 14 and a second mounting piece 15 which are connected in a sliding way, a mounting groove 11 is formed in one side of the first mounting piece 14, the space in the mounting groove 11 is large, smooth rotation of the balance piece 2 is ensured, when the second mounting piece 15 is sleeved outside the first mounting piece 14 in a sliding way, a first opening for the balance piece 2 to pass through is formed in one side of the second mounting piece 15, and a connecting part 13 is positioned on the second mounting piece 15, as shown in fig. 1 and 2; when the second mounting member 15 slides in the mounting groove 11 of the first mounting member 14, the second mounting member 15 has a second mounting groove 16 for the balance member 2 to rotate, the holding end 22 is located in the second mounting groove 16, the limiting end 21 sequentially extends out of the second mounting groove 16 and the mounting groove 11, the connecting portion 13 is located on the first mounting member 14, as shown in fig. 3, the first mounting member 14 is rotatably connected with the balance member 2, and the second mounting member 15 is used as an extension part of the first mounting member 14 to protect the balance member 2 together with the first mounting member 14, so as to prevent the balance member 2 from being damaged; for the connection stability of the mounting piece 1 and the door plate, the first mounting piece 14 is generally selected to be sleeved outside the second mounting piece 15, the second mounting piece 15 is used as an extension part, different door plate widths can be adapted, the first mounting piece 14 is used as a main body of a rotating support, the size of the first mounting piece is longer than that of the second mounting piece 15, the first mounting piece 14 is mounted on the door plate, the whole structure is more stable, plugs are arranged at two ends of the mounting piece 1, and the balance piece 2 is prevented from sliding out from the ports of the mounting piece 1.

The mounting member 1 has at least one first mounting member 14 and at least one second mounting member 15, the at least one first mounting member 14 and the at least one second mounting member 15 being arranged in sequence at intervals; the separate and spaced arrangement in turn means that there is only one second mounting member 15 between two first mounting members 14 or only one first mounting member 14 between two second mounting members 15; in this embodiment, one first mounting member 14 and one second mounting member 15 are generally selected; in order to increase the overall length of the mounting member 2, two first mounting members 14 may be optionally provided, where the two first mounting members 14 are slidably sleeved on two sides of the second mounting member 15, two second mounting members 15 may be optionally provided, and the two second mounting members 15 are slidably sleeved on two sides of the first mounting member 14, and in other embodiments, a plurality of second mounting members 15 and a plurality of first mounting members 14 may be optionally provided, where the first mounting members 14 and the second mounting members 15 are arranged at intervals, so as to increase the overall length of the mounting member 1.

It should be noted that when a suitable number of the first mounting member 14 and the second mounting member 15, and the first balance member 23 and the second balance member 24 are selected, it is necessary to ensure that the corner structure 25 of the first balance member 23 can rotationally overlap the rotation pivot 12 of the first mounting member 14, so as to ensure the normal operation of the sealing device.

The first mounting piece 14 and the second mounting piece 15 are fixedly connected through an adhesive or a screw 7; after the position adjustment between the first mounting member 14 and the second mounting member 15 is completed, the positions of the first mounting member 14 and the second mounting member 15 can be selectively fixed by using glue, and the positions of the screw 7 and the nut can be selectively fixed by matching, specifically, as shown in fig. 4, both the first mounting member 14 and the second mounting member 15 are provided with sliding grooves, the screw 7 penetrates out of the sliding grooves from the inside of the mounting member 1, the nut is in threaded connection with the portion of the screw 7 penetrating out of the sliding grooves, the distance between the nut and the screw 7 is shortened by screwing the nut, the position between the first mounting member 14 and the second mounting member 15 can be fixed, further, a supporting structure can be further arranged on the inner mounting member to support the screw 7, and when the nut is prevented from being separated from the screw 7, the screw 7 is directly separated from the sliding grooves, in other embodiments, the screw 7 is directly arranged on the first mounting member 14 or the second mounting member 15 to be abutted to the other by penetrating the threaded holes, and the positions of the screw 7 are fixed.

The pivot 12 in this embodiment refers to the edge of the mounting groove 11 provided on the first mounting member 14, and one side of the edge of the groove is inclined, that is, the pivot 12, and the holding end 22 of the balance member 2 is located in the region formed by the inclined edge and the inner side wall of the mounting groove 11 when the holding end 22 is driven to rotate by the gravity of the weight member 5, as shown in fig. 1 and 2.

The sealing device formed by this embodiment can be installed on an in-opening door, as shown in fig. 1, the rotation pivot 12 is far away from the door panel, the sealing strip 3 is also far away from the door panel, and also can be installed on an out-opening door, as shown in fig. 2, the rotation pivot 12 is near the door panel, and in other embodiments, the installation piece 1 can also be arranged inside the door panel, so that smoothness and neatness of two sides of the door panel are ensured.

When installing the barrier 4, the barrier 4 generally sets up in door frame and ground handing-over department, and normal traffic of people when not influencing the door and opening, barrier 4 generally be the cubic structure can, to the door body of structure such as to opening a door, ground bullet door, be inconvenient for just like ordinary singly opening the door setting barrier 4, utilize the mode that the magnetism inhaled to realize the rotation of balancing piece 2 in this embodiment.

According to the embodiment, the telescopic mounting piece 1 and the balancing piece 2 are arranged, the door plates with different sizes are adapted, the process of customizing the size of the balancing piece 2 and the size of the mounting piece 1 according to the door plates is avoided, the use convenience of the sealing device is improved, the use range is widened, and the like, and the operation and the use are convenient.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. A sealing device for an under door gap, comprising:

the mounting device comprises a mounting piece (1), wherein a mounting groove (11) is formed in one side of the mounting piece (1), a rotating fulcrum (12) is arranged at a notch of the mounting groove (11), and the mounting piece (1) is provided with a connecting part (13) for connecting with a door plate;

the balance piece (2), the balance piece (2) is provided with a limiting end (21) and a holding end (22), the holding end (22) is positioned in the mounting groove (11), the limiting end (21) stretches out of the mounting groove (11) so that the middle part of the balance piece (2) can rotate around the rotating pivot (12), the limiting end (21) is fixedly provided with a sealing strip (3), and the sealing strip (3) is of a strip-shaped structure made of flexible materials;

the blocking piece (4) is used for acting on the limiting end (21) and enabling the balance piece (2) to rotate when the door plate is closed, so that the sealing strip (3) seals a gap under the door when the door plate is closed in place;

wherein the balance member (2) is retractable along the rotation axis direction of the rotation fulcrum (12).

2. The sealing device for the under door gap according to claim 1, wherein the balancing piece (2) comprises a first balancing piece (23) and a second balancing piece (24) which are arranged in a sliding manner, one end of the first balancing piece (23) is the holding end (22), the other end of the first balancing piece is the limiting end (21), the first balancing piece (23) is rotationally lapped on the rotating supporting point (12), the second balancing piece (24) is located on one side, away from the rotating supporting point, of the first balancing piece (23), and the end, away from the mounting piece (1), of the second balancing piece (24) is fixedly connected with the sealing strip (3).

3. A sealing arrangement for an under door gap according to claim 2, characterized in that the first balancing member (23) has a corner structure (25), the corner structure (25) rotationally overlaps the rotation fulcrum (12), one end of the corner structure (25) is the holding end (22), the other end is the limiting end (21), the holding end (22) is fixed with a weight member (5), the weight member (5) can drive the first balancing member (23) to rotate around the rotation fulcrum (12), so that the limiting end (21) rotates towards a direction approaching the mounting member (1).

4. A sealing arrangement for an under door gap according to claim 3, characterized in that the side of the corner structure (25) remote from the pivot point (12) is provided with a limit projection (6), said limit projection (6) being adapted to limit the disengagement of the first balancing member (23) from the notch of the mounting groove (11) when the first balancing member (23) rotates around the pivot point (12).

5. A sealing arrangement for an under door gap according to claim 2, characterized in that the balancing member (2) has at least one first balancing member (23) and at least one second balancing member (24), the at least one first balancing member (23) and the at least one second balancing member (24) being arranged separately in sequence.

6. A sealing arrangement for an under door gap according to claim 2, characterized in that the sealing strip (3) is located at the side of the limit end (21) remote from the pivot point (12).

7. A sealing arrangement for an under door gap according to claim 1, characterized in that the mounting (1) is retractable in the direction of the rotation axis of the rotation fulcrum (12).

8. A sealing arrangement for an under door gap according to claim 1, characterized in that the mounting part (1) comprises a first mounting part (14) and a second mounting part (15) which are in sliding connection, the mounting groove (11) is arranged at one side of the first mounting part (14), when the second mounting part (15) is slidably sleeved outside the first mounting part (14), one side of the second mounting part (15) is provided with a first opening through which the balancing part (2) passes, the connecting part (13) is arranged on the second mounting part (15), when the second mounting part (15) slides in the mounting groove (11) of the first mounting part (14), the second mounting part (15) is provided with a second mounting groove (16) for the balancing part (2) to rotate, the retaining end (22) is arranged in the second mounting groove (16), the limiting end (21) sequentially extends out of the second mounting groove (16) and the mounting groove (11), and the connecting part (13) is arranged on the first mounting part (14).

9. A sealing device for an under door gap as claimed in claim 8, wherein,

the mounting element (1) comprises at least one first mounting element (14) and at least one second mounting element (15), wherein the at least one first mounting element (14) and the at least one second mounting element (15) are arranged at intervals in sequence.

10. A sealing device for an under door gap as claimed in claim 8, wherein,

the first mounting piece (14) and the second mounting piece (15) are fixedly connected through an adhesive or a screw (7).

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