Novel primary-secondary door

Abstract

The utility model discloses a novel primary and secondary door which comprises a primary door, a secondary door and a door frame which are arranged from bottom to top, the primary door is hinged to the door frame through a first hinge, the secondary door is hinged to the door frame through a second hinge, and the combination positions of the primary door and the secondary door are provided with protruding parts and concave parts. The convex part of the primary door and the concave part of the secondary door are mutually embedded, a wedge block is arranged at the top end of the concave part of the primary door, a groove is formed in the bottom end of the convex part of the secondary door, the wedge block and the groove are correspondingly arranged and used for connecting the primary door and the secondary door, and an adjusting mechanism is arranged on the front surface of the primary door and comprises an adjustable telescopic spring rod. The telescopic spring rod is used for adjusting lifting of the wedge block. The utility model has the beneficial effects that the fixing effect on the sub-door can be realized only by using the adjusting structure, and convenient regulation and control can be completed after the lifting handle is pulled down, so that the sub-door at the upper part can be independently opened, and complicated door lock opening and closing operation is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture doors, in particular to a novel double door. Background Art

[0002] A double-door is usually composed of a sub-door and a main door, and is usually a double-door structure. For example, the technology with patent number CN111075313A is a similar structure, and a door lock structure is generally provided between the sub-door and the main door; however, according to actual usage needs, such as when there is an attic during decoration, or for example, the double-door structure with patent number CN106639830A, upper and lower double-doors are provided.

[0003] However, this type of double-door structure usually has poor closing properties, especially since there is no door lock structure between the sub-door and the main door, resulting in a large gap at the joint. Unlike double-door structures, the sub-doors of upper and lower double-door structures often need to be opened for ventilation to achieve ventilation while preventing snakes, insects, rats and ants from entering directly from the bottom. Therefore, in actual use, it is necessary to be able to open the sub-doors independently, and to provide sound insulation and heat insulation effects after closing. How to design a double-door that meets the above needs is the development trend of upper and lower double-door technology. Utility Model Content

[0004] In view of the above-mentioned existing technologies, the present invention provides a new type of double-door, and the main technical problem it solves is how to improve the sealing effect of the upper and lower double-door and design a more convenient double-door control structure.

[0005] To achieve the above-mentioned purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0006] A novel double-door comprises a main door, a sub-door and a door frame placed from bottom to top, wherein the main door is connected to the door frame by a first hinge, and the sub-door is connected to the door frame by a second hinge, and the main door and the sub-door are both provided with a raised portion and a recessed portion at the joint, the raised portion of the main door and the recessed portion of the sub-door are fitted into each other, a wedge is provided at the top of the recessed portion of the main door, and a groove is provided at the bottom of the raised portion of the sub-door, the wedge and the groove are correspondingly provided and used to connect the main door and the sub-door, and an adjustment mechanism is provided on the front surface of the main door, the adjustment mechanism comprises an adjustable telescopic spring rod, and the telescopic spring rod is used to adjust the lifting and lowering of the wedge;

[0007] The raised portion of the mother door includes a tooth plate on the side facing the sub-door, and the raised portion of the sub-door includes a sound insulation layer on the side facing the mother door; the sound insulation layer and the tooth plate are in contact with each other, and are used for sealing between the mother door and the sub-door.

[0008] Preferably, the surface of the adjustment mechanism is provided with a lifting handle and a fixing rod connected to the lifting handle, the left end of the fixing rod is connected to the bottom side of the wedge block, and the bottom of the wedge block is fixedly connected to a telescopic spring rod.

[0009] Preferably, an adjustment space is provided inside the raised portion of the sub-door, and a connecting rod structure is provided inside the adjustment space. The connecting rod structure includes a first connecting rod, which passes through the top of the groove, and a rotating shaft is installed on the top of the first connecting rod. A second connecting rod is also provided on the left side of the rotating shaft, and an extrusion plate is provided on the left side of the second connecting rod. A movable shaft is provided between the second connecting rod and the extrusion plate, and a sound insulation layer is provided on the extrusion plate. A slide plate is installed at one axial end of the rotating shaft for the rotating shaft to slide up and down on the slide plate.

[0010] Preferably, the upper and lower parts of the extrusion plate are both provided with slideway structures connected to the inner wall of the adjustment space for limiting the movement range of the extrusion plate, and the sound insulation layer uses a flexible, compressible sound-absorbing or sound-insulating material.

[0011] Preferably, the slide plate is also provided with a lifting groove, which engages with the protruding structure on one side of the rotating shaft axis, so that the rotating shaft moves up and down in the lifting groove when the first connecting rod moves up and down. The number of slide plates is not less than two, which are connected to the left and right by the through shafts at the four corners and fixed to the side wall surface of the adjustment space.

[0012] Preferably, a handle is also provided on the surface of the sub-door, and the handle is used to pull out the sub-door.

[0013] Preferably, the sound insulation layer provided at the extruded plate is in a raised laminated shape, and each layer of the raised laminated sound insulation layer is independently provided.

[0014] Preferably, a torsion spring is provided at the movable axis of the second hinge.

[0015] The beneficial effects of the present invention are: the sub-door can be fixed by using only the adjustment structure, and convenient adjustment can be completed by pulling down the lifting handle, so that the upper sub-door can be opened separately without the need for complicated door lock opening and closing operations; and the sub-door can be equipped with a torsion spring on the hinge structure. On the basis of the torsion spring control, the sub-door can always be in an open state, and the inflow and outflow airflow will not affect the sub-door. There is no need to set up a structure for fixing the sub-door again near the sub-door. After the sub-door and the main door are connected, the weight of the main door itself will counteract the pulling force generated by the torsion spring of the top sub-door, so that the opening and closing action of the entire door will not be affected.

[0016] Based on the above-mentioned adjustment structure, the utility model further designs a sound insulation structure for use with a connecting rod mechanism, so that after the sub-door and the main door are closed, the conventional sound insulation structure can further squeeze the sound insulation layer through the rise of the wedge block, rather than being affected by the wedge block; and structural adjustments are also made according to the function of the sound insulation layer, so that the sound insulation effect after pressure closure is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure in Example 1 of the present application;

[0018] Figure 2 This is a schematic diagram of the closed state of the adjustment mechanism in Example 1 of the present application;

[0019] Figure 3 This is a schematic structural diagram of the chute plate in Example 1 of the present application;

[0020] Figure 4 This is a schematic diagram of the adjustment mechanism in the open state in Example 1 of the present application;

[0021] Figure 5 This is a schematic diagram of the sound insulation layer structure in Example 2 of this application;

[0022] Description of Figure Numbers:

[0023] 1. Main door; 101. First hinge; 2. Sub-door; 201. Second hinge; 202. Handle; 3. Adjustment mechanism; 301. Lifting handle; 302. Fixing rod; 303. Wedge; 304. Telescopic spring rod; 4. Adjustment space; 401. Groove; 402. First connecting rod; 403. Rotating axis; 404. Slide plate; 405. Second connecting rod; 406. Sound insulation layer; 407. Extrusion plate; 408. Lifting groove; 409. Through-shaft; 5. Tooth plate; 6. Raised portion; 7. Recessed portion. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. In the following description, reference is made to "some embodiments", which describes a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0025] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0026] Example 1

[0027] Please refer to the attached Figures 1-4 The present application provides a new type of mother-and-child door, comprising a mother door 1, a child door 2 and a door frame placed from bottom to top, wherein the mother door 1 is connected to the door frame through a first hinge 101, and the child door 2 is connected to the door frame through a second hinge 201.

[0028] Further, such as Figure 2 As shown, the mother door 1 and the sub-door 2 are both provided with a raised portion 6 and a recessed portion 7 at the junction. The raised portion 6 of the mother door 1 and the recessed portion 7 of the sub-door 2 are embedded in each other. A wedge 303 is provided at the top of the recessed portion 7 of the mother door 1, and a groove 401 is provided at the bottom of the raised portion 6 of the sub-door 2. The wedge 303 and the groove 401 are correspondingly arranged for connecting the mother door 1 and the sub-door 2. An adjustment mechanism 3 is provided on the front surface of the mother door 1. The adjustment mechanism 3 includes an adjustable telescopic spring rod 304. The telescopic spring rod 304 is used to adjust the lifting and lowering of the wedge 303, so that the mother door 1 and the sub-door 2 can be moved by the action of the adjustment mechanism 3 to allow the wedge 303 to enter the groove 401 to form a lateral limit, so that the sub-door 2 can be opened alone, or the sub-door 2 can move together with the mother door 1. When the sub-door 2 is opened alone, the chimney effect allows hot air to circulate from the top to the outside, thereby increasing the air circulation efficiency between indoor and outdoor.

[0029] The surface of the adjustment mechanism 3 is provided with a lifting handle 301 and a fixed rod 302 connected to the lifting handle 301. The left end of the fixed rod 302 is connected to the bottom side of the wedge block 303. The bottom of the wedge block 303 is fixedly connected to a telescopic spring rod 304. When the user pulls the lifting handle 301 downward, the wedge block 303 moves downward so that the sub-door 2 can be opened alone. After releasing the hand, the wedge block 303 will reset again; when the sub-door 2 is reset, just pull the lifting handle 301 again and place the wedge block 303 into the groove 401.

[0030] Furthermore, since there is usually a gap at the joint of a mother-and-child door, especially a mother-and-child door arranged up and down, a sound insulation structure is provided at the vertical joint between the mother door 1 and the child door 2, and a tooth plate 5 is provided on the side of the raised portion 6 of the mother door 1 facing the child door 2, and a sound insulation layer 406 is provided on the side of the raised portion 6 of the child door 2 facing the mother door 1. The sound insulation layer 406 and the tooth plate 5 are in contact with each other, so that when the child door 2 and the mother door 1 are fixed by the wedge block 303, pressure is generated between the side of the raised portion 6 of the child door 2 and the raised portion 6 of the mother door 1. The pressure will cause the tooth plate 5 and the raised portion 6 of the child door 2 to squeeze the sound insulation layer 406, so that the pressure-bearing surface formed by the flexible sound insulation layer 406 forms a tooth-like structure, so that after the child door 2 is closed, external sound and air are less likely to be transmitted into the room;

[0031] Further, such as Figures 2-4 As shown, the sound insulation generated by the sound insulation layer 406 is only based on the pressure generated by the wedge block 303 on the sub-door 2, and cannot generate a sufficiently large pressure. Therefore, an adjustment space 4 is provided inside the raised portion 6 of the sub-door 2, and a connecting rod structure is provided inside the adjustment space 4. The connecting rod structure includes a first connecting rod 402, the first connecting rod 402 passes through the top of the groove 401, and a rotating shaft 403 is installed on the top of the first connecting rod 402. A second connecting rod 405 is further provided on the left side of the rotating shaft 403, and an extrusion plate 407 is provided on the left side of the second connecting rod 405. A movable shaft is provided between the second connecting rod 405 and the extrusion plate 407, and the sound insulation layer 406 is provided on the extrusion plate 407. A slide plate 404 is installed at one axial end of the rotating shaft 403 for the rotating shaft 403 to slide up and down on the slide plate 404. That is, a planar connecting rod structure is formed inside the adjustment space 4 by the first connecting rod 402 and the second connecting rod 405. When the wedge block 303 is pushed upward, the connecting rod structure will push the extrusion plate 407 to move to the left, so that the sound insulation layer 406 can further generate pressure on the tooth plate 5 on the basis of the wedge block 303. Figure 4 As for Figure 2 The connecting rod is changed to achieve a better sealing rate and reduce the impact of noise and temperature.

[0032] Slide structures connected to the inner wall of the adjustment space 4 are provided at the upper and lower parts of the extrusion plate 407. The sound insulation layer 406 uses polyurethane foam or flexible rubber sound insulation pads, so that the adjustment space 4 produces an overall internal seal through the slide structure and the extrusion plate 407. When the sub-door 2 and the main door 1 are closed, the sound insulation layer 406 made of flexible material can also reduce the sound of the impact.

[0033] like Figure 3As shown, the rotating shaft 403 is provided with a first connecting rod 402 and a second connecting rod 405 with different directions. The movable shaft between the second connecting rod 405 and the extrusion plate 407 can rotate up and down. The slide plate 404 is also provided with a lifting groove 408. The lifting groove 408 is engaged with the protruding structure on one side of the axial direction of the rotating shaft 403, so that the rotating shaft 403 can move up and down in the lifting groove 408 when the first connecting rod 402 moves up and down. The designed slide plate 404 can also be multiple, connected left and right by the through shafts 409 at the four corners, and fixed to the side wall surface of the adjustment space 4, so that each slide plate 404 acts as a fulcrum, which can allow multiple wedge blocks 303 to rise and then combine with multiple first push rods 402 to push the long strip extrusion plate 407.

[0034] Furthermore, a handle 202 is provided on the surface of the sub-door 2, and the handle 202 is used to pull out the sub-door 2.

[0035] Further, such as Figure 1 、 2 As shown in FIG4 , a ball buckle can be provided at the lower portion of the adjustment mechanism 3 to fix the vertical position of the lifting handle 301 .

[0036] Example 2

[0037] like Figure 5 As shown, the difference from Example 1 is that the sound insulation layer 406 provided at the extrusion plate 407 is in a laminated shape. The laminated sound insulation layer 406 can be combined with a variety of different materials. For example, the top layer is provided with a softer polyurethane foam, the middle layer is provided with a flexible rubber sound insulation pad, and the bottom layer is provided with a hard polyurethane foam. After the sound insulation layer 406 is squeezed, the softer polyurethane foam at the top will be wrapped and pushed forward by the middle layer and the bottom layer. Due to the reflection principle of sound waves, it will be reflected at the hard polyurethane foam and enter through the gap. At this time, the sound-absorbing material composed of the softer polyurethane foam will reduce the transmission of the sound waves, thereby preventing noise from entering through the gap.

[0038] Example 3

[0039] The difference from Example 1 is that a torsion spring is provided at the second hinge 201, and the torsion spring can make the sub-door 2 automatically open after the adjustment mechanism 3 is actuated.

[0040] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. The scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A new type of double door, characterized by: The invention comprises a mother door (1), a sub-door (2) and a door frame placed from bottom to top, wherein the mother door (1) is connected to the door frame via a first hinge (101), and the sub-door (2) is connected to the door frame via a second hinge (201). The mother door (1) and the sub-door (2) are both provided with a raised portion (6) and a recessed portion (7) at the joint, and the raised portion (6) of the mother door (1) and the recessed portion (7) of the sub-door (2) are engaged with each other, and the recessed portion of the mother door (1) is provided with a raised portion (6) and a recessed portion (7) at the joint. (7) A wedge block (303) is provided at the top end, and a groove (401) is provided at the bottom end of the raised portion (6) of the sub-door (2). The wedge block (303) and the groove (401) are correspondingly provided and are used to connect the main door (1) and the sub-door (2). An adjustment mechanism (3) is provided on the front surface of the main door (1). The adjustment mechanism (3) includes an adjustable telescopic spring rod (304). The telescopic spring rod (304) is used to adjust the lifting and lowering of the wedge block (303); The side of the raised portion (6) of the mother door (1) facing the sub-door (2) includes a tooth plate (5), and the side of the raised portion (6) of the sub-door (2) facing the mother door (1) includes a sound insulation layer (406); the sound insulation layer (406) and the tooth plate (5) are in contact with each other and are used for sealing between the mother door (1) and the sub-door (2).

2. A new type of double door according to claim 1, characterized in that: The surface of the adjustment mechanism (3) is provided with a lifting handle (301) and a fixing rod (302) connected to the lifting handle (301); the left end of the fixing rod (302) is connected to the bottom side of the wedge block (303); and the bottom of the wedge block (303) is fixedly connected to a telescopic spring rod (304).

3. A novel double door according to claim 1 or 2, characterized in that: An adjustment space (4) is provided inside the raised portion (6) of the sub-door (2), and a first connecting rod (402) is provided inside the adjustment space (4), the first connecting rod (402) passes through the top of the groove (401), a rotating shaft (403) is installed on the top of the first connecting rod (402), a second connecting rod (405) is further provided on the left side of the rotating shaft (403), an extrusion plate (407) is provided on the left side of the second connecting rod (405), and a movable shaft is provided between the second connecting rod (405) and the extrusion plate (407), the sound insulation layer (406) is provided on the extrusion plate (407), and a slide plate (404) is installed on one axial end of the rotating shaft (403) for the rotating shaft (403) to slide up and down on the slide plate (404).

4. The novel double door according to claim 3, characterized in that: The upper and lower parts of the extrusion plate (407) are both provided with slideway structures connected to the inner wall of the adjustment space (4) for lateral movement of the extrusion plate (407), and the sound insulation layer (406) uses a flexible, compressible sound-absorbing or sound-insulating material.

5. The novel double door according to claim 3, characterized in that: The slide plate (404) is further provided with a lifting groove (408), and the lifting groove (408) is engaged with the protruding structure on one axial side of the rotating shaft (403), so that when the first connecting rod (402) moves up and down, the rotating shaft (403) moves up and down in the lifting groove (408). The number of the slide plates (404) is not less than two, and they are connected to the left and right by the through shafts (409) at the four corners and fixed to the side wall surface of the adjustment space (4).

6. The novel double door according to claim 5, characterized in that: A handle (202) is also provided on the surface of the sub-door (2), and the handle (202) is used to pull out the sub-door (2).

7. The novel double door according to claim 5, characterized in that: The sound insulation layer (406) provided at the extruded plate (407) is in a raised laminated shape, and each layer of material of the raised laminated shape of the sound insulation layer (406) is independently provided.

8. The novel double door according to claim 1, characterized in that: A torsion spring is provided at the movable axis of the second hinge (201).

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