Door with automatic slow door closing function

Abstract

The invention discloses a door with an automatic slow door closing function, which comprises a door leaf, a door frame, a heaven and earth hinge connected with the door leaf and the door frame, and the heaven and earth hinge comprises a first rotating device and a second rotating device, the first rotating device at least comprises a first mounting piece, a second mounting piece, a shaft-shaped assembly, a movable sleeve, a damper, a first pin shaft, a second pin shaft, a first sliding groove and a second sliding groove. The second mounting piece is movably arranged on the shaft-shaped assembly in a sleeving manner and can limit the movable sleeve, the damper and the second pin shaft; the two ends of the damper abut against the movable sleeve and the second installation piece correspondingly. And the second rotating device at least comprises a third mounting piece, a fourth mounting piece and a reset assembly. The automatic slow door closing effect can be achieved, a reset torsional spring does not need to be arranged in the door, damping oil does not need to be injected into the cavity, normal use in the low-temperature environment can be met, the adaptability of the product is greatly improved, the structure is simple, and cost is low.

Description

Technical Field

[0001] The invention relates to the field of hardware equipment, in particular to a door with an automatic slow closing function. Background Art

[0002] A hinge is a mechanical device used to connect two solid bodies and allow rotation between them.

[0003] The existing top and bottom hinges are generally composed of a pair of mirror-symmetrical hinged joints, which can only replace traditional hinges to achieve the rotation function. Although compared with traditional hinges, they are hidden installations and can improve aesthetics, they cannot guarantee the smoothness of the door opening and closing process.

[0004] As shown in the Chinese utility model patent with publication number CN220687062U, a world hinge is disclosed, including an upper rotating device and a lower rotating device, the lower rotating device includes a third mounting member, a fourth mounting member and a rotating ball, the fourth mounting member is detachably mounted on the third mounting member and rotatably cooperates with the third mounting member, the rotating ball is movably mounted on the fourth mounting member and cooperates with the third mounting member, the upper rotating device includes a first mounting member, a second mounting member, a rotating member and a first connecting head, one end of the rotating member is rotatably mounted on the second mounting member, and the other end is detachably mounted on the first mounting member and is limited by the first connecting head. A door using the same is also disclosed, including the above-mentioned world hinge, and also including a door leaf and a door frame, the upper and lower ends of the door leaf are rotatably mounted on the door frame through the upper rotating device and the lower rotating device respectively. The lower rotating device of the world hinge is provided with a rotating ball, which can effectively improve the smoothness of rotation, and the upper rotating device has an automatic reset function, which is easy to use.

[0005] Although the upper rotating device of the above-mentioned top and bottom hinge has an automatic reset function and can realize the function of automatic door closing, when it automatically closes the door, due to the fast rebound speed of the reset torsion spring, the door leaf hits the door frame with great force when closing, which is not only easy to cause damage but also produces loud noise, affecting the user experience. Summary of the invention

[0006] The object of the present invention is to provide a door with an automatic slow closing function, which can at least solve one of the above problems.

[0007] According to one aspect of the present invention, a door with an automatic slow closing function is provided, comprising a door leaf, a door frame, and a top and bottom hinge connecting the door leaf and the door frame, wherein the top and bottom hinge comprises a first rotating device and a second rotating device, wherein the first rotating device comprises at least:

[0008] A first mounting member, mounted on the door frame;

[0009] A second mounting member is mounted on the door leaf;

[0010] An axial component, one end of which is fixedly sleeved on the first mounting member;

[0011] A movable sleeve, which is movably mounted on the other end of the shaft-shaped component and is mounted in the second mounting member;

[0012] A damper is sleeved in the second mounting member and matched with the movable sleeve;

[0013] A first pin connecting the second mounting member and the movable sleeve;

[0014] A second pin shaft connects the movable sleeve and the shaft-shaped component;

[0015] A first sliding groove is provided on the movable sleeve and is limitedly matched with the first pin shaft;

[0016] The second sliding groove is provided in the movable sleeve and is limitedly matched with the second pin shaft;

[0017] The second mounting member can be movably mounted on the shaft-shaped component and can limit the position of the movable sleeve, the damper and the second pin shaft;

[0018] The two ends of the damper are respectively against the movable sleeve and the second mounting member;

[0019] The second rotating device at least comprises:

[0020] A third mounting member is mounted on the door frame;

[0021] A fourth mounting member is mounted on the door leaf;

[0022] A reset assembly, connecting the third mounting member and the fourth mounting member;

[0023] The reset assembly includes a reset torsion spring and a second connector. The second connector is sleeved in the fourth mounting piece. One end of the reset torsion spring is connected to the fourth mounting piece, and the other end is connected to the first end of the second connector. The second end of the second connector is connected to the third mounting piece.

[0024] Therefore, the present invention provides a door with an automatic slow closing function of a new structure. The door has the automatic slow closing function, and the specific working principle is: when the door leaf moves away from the door frame under the action of external forces such as the user pushing the door, the reset torsion spring installed in the reset assembly stores elastic potential energy; when the external force disappears, the door leaf automatically approaches the door frame under the action of the restoring force of the reset torsion spring, and the door leaf will drive the second mounting member to rotate relative to the shaft-shaped assembly during the door closing process, and drive the movable sleeve to move in the second mounting member, and the movable sleeve moves along the length direction of the shaft-shaped assembly under the sliding cooperation of the first pin shaft and the first slide groove and the sliding cooperation of the second pin shaft and the second slide groove, thereby generating a thrust on the damper, and the damper generates a reverse thrust, thereby preventing the second mounting member from rotating into place too quickly, thereby playing a buffering role and achieving the effect of slowly closing the door; after the door is closed, due to the self-gravity of the door leaf and the action of the reset torsion spring, in the absence of external force, the reverse thrust of the damper cannot drive the second mounting member to rotate, that is, the door cannot be automatically opened. In addition, the first rotating device adopts a mechanical structure for buffering, and there is no need to set a reset torsion spring inside, nor to inject damping oil into the cavity. The second rotating device also only realizes mechanical reset through a reset torsion spring, and there is no need to inject damping oil into the cavity. It can not only meet normal use in low temperature environments and greatly improve the adaptability of the product, but also has a simple structure and low cost.

[0025] In some embodiments, the first mounting member includes a first base portion and a first extension portion, the first extension portion extends in a direction perpendicular to the first base portion and is connected to the door frame, the first base portion is provided with a mounting groove, the axial component includes a fixed shaft and a first connecting head capable of limiting the rotation of the fixed shaft in an axial direction, the first connecting head is fixedly mounted on the outer periphery of the fixed shaft and installed in the mounting groove.

[0026] In some embodiments, the second mounting member includes a first cylindrical body, a first substrate and a first end cover, the first substrate is connected to the door leaf, the first cylindrical body extends in a direction perpendicular to the first substrate, a first accommodating cavity is formed inside the first cylindrical body, the movable sleeve and the damper are both located in the first accommodating cavity, the first end cover is arranged at one end of the first cylindrical body away from the first substrate and is connected to the first cylindrical body, one end of the damper is abutted against the movable sleeve, and the other end is abutted against the first end cover, a first connecting hole matching with the second pin shaft is opened on the fixed shaft, a second connecting hole matching with the first pin shaft is opened on the second mounting member, the first slide groove is a special-shaped groove extending along the axial rotation direction of the movable sleeve, and the second slide groove is a strip groove extending in the length direction of the movable sleeve.

[0027] In some embodiments, a first groove-shaped limiting structure is provided on the first connector, and a first limiting protrusion which cooperates with the first groove-shaped limiting structure is provided in the installation groove;

[0028] Alternatively, a first groove-shaped limiting structure is provided in the installation groove, and the first connector is provided with a first limiting protrusion that cooperates with the first groove-shaped limiting structure.

[0029] In some embodiments, the shaft-shaped component further includes a bearing, which is sleeved on the outer circumference of the fixed shaft and is limitedly matched with the mounting groove. Thus, the bearing plays a role in limiting the first connector and enhancing stability.

[0030] In some embodiments, the shaft-shaped component further includes a first retaining spring and a second retaining spring, the fixed shaft is provided with a first limit slot and a second limit slot, the first retaining spring is sleeved on the outer periphery of the first limit slot and is located between the movable sleeve and the bearing, and the second retaining spring is sleeved on the second limit slot and is located between the first connector and the bottom of the mounting slot. Thus, the provision of the first retaining spring and the second retaining spring can prevent the fixed shaft from displacement in the length direction.

[0031] In some embodiments, the first rotating device further includes a fixing sleeve, which is sleeved on the outer circumference of the second mounting member and can limit the position of the first pin shaft.

[0032] In some embodiments, the first rotating device also includes a locking screw, and the first mounting member is provided with a threaded hole connected to the mounting groove, the locking screw is detachably mounted in the threaded hole, the locking screw is threadably matched with the threaded hole, and can be abutted against the first connecting head.

[0033] In some embodiments, the second rotating device further includes a slider and a locking screw, and the third mounting member includes a second base portion and a second extending portion, and the second extending portion extends in a direction perpendicular to the second base portion and is connected to the door frame;

[0034] The second base portion is provided with a second groove-shaped limiting structure capable of limiting the second connector from rotating in the axial direction;

[0035] The slider is detachably mounted on the second base portion and forms a second slot-shaped limiting structure together with the second base portion;

[0036] The locking screw cooperates with the slider and the second base portion and is used to lock the slider to the second base portion.

[0037] In some embodiments, the fourth mounting member includes a second cylindrical body, a second substrate and a second end cover, the second substrate is connected to the door leaf, the second cylindrical body extends in a direction perpendicular to the second substrate, a second accommodating cavity is formed inside the second cylindrical body, a reset torsion spring is located in the second accommodating cavity, the second end cover is arranged at one end of the second cylindrical body away from the second substrate and is connected to the second cylindrical body, a second limiting protrusion is arranged at one end of the second end cover, a third limiting protrusion is arranged at one end of the second connecting head, one end of the reset torsion spring is connected to the second limiting protrusion, and the other end is connected to the third limiting protrusion, and the second substrate can limit the second connecting head. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a simplified front view structural schematic diagram of the door of Example 1 of the present invention;

[0039] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the first rotating device of the door shown;

[0040] Figure 3 for Figure 2 A bottom view of the structure of the first rotating device shown;

[0041] Figure 4 for Figure 2 A schematic cross-sectional structural diagram of the first rotating device along the AA direction shown;

[0042] Figure 5 for Figure 2 The perspective structural diagram of the first rotating device shown in the figure with some structures omitted;

[0043] Figure 6 for Figure 2 An exploded structural diagram of the first rotating device shown;

[0044] Figure 7 for Figure 6 A schematic diagram of the three-dimensional structure of the fixed shaft of the first rotating device shown;

[0045] Figure 8 for Figure 6 A three-dimensional structural schematic diagram of a movable sleeve of the first rotating device shown;

[0046] Fig. 9 for Figure 2 An exploded structural diagram of a partial structure of the first rotating device shown;

[0047] Fig.10 for Figure 1 A schematic diagram of the three-dimensional structure of the second rotating device of the door shown;

[0048] Fig.11 for Fig.10 A partial exploded structural schematic diagram of the second rotating device shown;

[0049] Fig.12 for Fig.11 A partial exploded structural schematic diagram of the second rotating device shown;

[0050] Fig.13 for Fig.11 An exploded structural diagram of a reset assembly of the second rotating device shown;

[0051] Fig.14 It is a schematic diagram of the exploded structure of a part of the structure of the first rotating device of Example 2 of the present invention;

[0052] Fig.15 It is a front view structural schematic diagram of the first rotating device of Example 3 of the present invention.

[0053] Figures 1 to 15 Reference numerals in the figure: 100-bottom hinge; 200-door leaf; 300-door frame; 1-first rotating device; 2-second rotating device; 11-first mounting member; 12-second mounting member; 13-axial assembly; 14-movable sleeve; 15-damper; 16-first pin shaft; 17-second pin shaft; 18-locking screw; 19-fixing sleeve; 21-third mounting member; 22-fourth mounting member; 23-reset assembly; 24 -slider; 25-locking screw; 111-first base; 112-first extension; 121-first cylindrical body; 122-first base plate; 123-first end cover; 131-fixed shaft; 132-first connector; 133-bearing; 134-first retaining spring; 135-second retaining spring; 136-first groove-type limiting structure; 137-first limiting protrusion; 141-first slide groove; 142-second slide groove; 151- Telescopic rod; 211-second base portion; 212-second extension portion; 221-second substrate; 222-second cylindrical body; 223-second end cover; 231-second connector; 232-reset torsion spring; 241-limiting edge; 242-first limiting half groove; 111a-installation groove; 111b-threaded hole; 112a-third connecting hole; 121a-second connecting hole; 121b-first accommodating cavity; 131a-first connecting Connecting hole; 131b-first limiting slot; 131c-second limiting slot; 131d-limiting plane; 132a-third limiting slot; 132b-external thread; 211a-second groove-type limiting structure; 211b-seventh connecting hole; 211c-guide groove; 211d-second limiting half groove; 212a-fifth connecting hole; 221a-sixth connecting hole; 223a-second limiting protrusion; 231a-third limiting protrusion. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0055] Example 1

[0056] Figures 1 to 13 A door with an automatic slow closing function according to an embodiment of the present invention is schematically shown.

[0057] like Figures 1 to 13 As shown, the door with automatic slow closing function includes a door leaf 200 and a door frame 300 . A top and bottom hinge 100 connects the door leaf 200 and the door frame 300 . The top and bottom hinge 100 includes a first rotating device 1 and a second rotating device 2 .

[0058] like Figure 2-9 As shown, the first rotating device 1 of this embodiment at least includes:

[0059] A first mounting member 11 is mounted on the door frame 300;

[0060] The second mounting member 12 is mounted on the door leaf 200;

[0061] An axial component 13, one end of which is fixedly sleeved on the first mounting member 11;

[0062] The movable sleeve 14 is movably mounted on the other end of the shaft-shaped component 13 and is mounted inside the second mounting member 12;

[0063] The damper 15 is sleeved in the second mounting member 12 and matched with the movable sleeve 14;

[0064] A first pin 16 connecting the second mounting member 12 and the movable sleeve 14;

[0065] A second pin 17, connecting the movable sleeve 14 and the shaft component 13;

[0066] The first sliding groove 141 is provided on the movable sleeve 14 and is limitedly matched with the first pin shaft 16;

[0067] The second sliding groove 142 is provided on the movable sleeve 14 and is limitedly matched with the second pin shaft 17;

[0068] The second mounting member 12 is movably mounted on the shaft assembly 13 and can limit the position of the movable sleeve 14, the damper 15 and the second pin 17;

[0069] Two ends of the damper 15 abut against the movable sleeve 14 and the second mounting member 12 respectively.

[0070] Preferably, the first mounting member 11 of the present embodiment is L-shaped as a whole, and includes a first base portion 111 and a first extension portion 112. The first extension portion 112 extends upward perpendicular to the first base portion 111 and is provided with a third connecting hole 112a. The first extension portion 112 is fixedly connected to the door frame 300 by the cooperation of screws and the third connecting hole 112a.

[0071] The first base portion 111 of the first mounting member 11 is provided with a mounting groove 111a. The shaft assembly 13 includes a fixed shaft 131 and a first connector 132 capable of limiting the fixed shaft 131 from rotating in the axial direction. The first connector 132 is fixedly sleeved on the outer periphery of the fixed shaft 131 and installed in the mounting groove 111a.

[0072] Preferably, the second mounting member 12 of the present embodiment is L-shaped as a whole, and includes a first cylindrical body 121, a first substrate 122 and a first end cover 123, wherein the first cylindrical body 121 extends upward perpendicularly to the first substrate 122. The first substrate 122 is provided with a fourth connecting hole, and the first substrate 122 is fixedly connected to the door leaf 200 by the cooperation of a screw and the fourth connecting hole. A first accommodating chamber 121b is formed inside the first cylindrical body 121, and the movable sleeve 14 and the damper 15 are both located in the first accommodating chamber 121b. The first end cover 123 is arranged at one end of the first cylindrical body 121 away from the first substrate 122 and is fixedly connected to the first cylindrical body 121 by welding. The damper 15 is a commercially available hydraulic damping rod, one end of the damper 15 is against the movable sleeve 14, and the other end is against the first end cover 123 through its own telescopic rod 151. The fixed shaft 131 is provided with a first connection hole 131a matched with the second pin 17, the first cylindrical body 121 of the second mounting member 12 is provided with a second connection hole 121a matched with the first pin 16, the first slide groove 141 is a special-shaped groove extending along the axial rotation direction of the movable sleeve 14, and the second slide groove 142 is a strip groove extending in the length direction of the movable sleeve 14. There are two first slide grooves 141 and second slide grooves 142, which are respectively arranged on the outer wall of the movable sleeve 14. The first pin 16 penetrates the two first slide grooves 141 and the second connection hole 121a of the first cylindrical body 121, and the two ends are fixed by flattening or squeezing, which is similar to the rivet structure. The second pin 17 penetrates the two second slide grooves 142 and the first connection hole 131a of the fixed shaft 131, and the two ends are against the inner wall of the first cylindrical body 121, and the first cylindrical body 121 is limited. Therefore, the length of the first pin 16 is greater than the length of the second pin 17.

[0073] A first groove-shaped limiting structure 136 is disposed on the first connector 132, and a first limiting protrusion 137 that cooperates with the first groove-shaped limiting structure 136 is disposed in the mounting groove 111a;

[0074] Alternatively, a first slot-shaped limiting structure 136 is disposed in the installation slot 111 a , and the first connector 132 is provided with a first limiting protrusion 137 that cooperates with the first slot-shaped limiting structure 136 .

[0075] The cooperation between the first groove-shaped limiting structure 136 and the first limiting protrusion 137 can limit the first connector 132 and prevent the first connector 132 from rotating, that is, it actually prevents the fixed shaft 131 from rotating.

[0076] like Fig. 9 As shown, a first groove-type limiting structure 136 is provided on the first connecting head 132 of the present embodiment. The first groove-type limiting structure 136 can be a first groove-type limiting structure 136 with multiple limiting teeth forming multiple slots. A first limiting protrusion 137 that cooperates with the first groove-type limiting structure 136 is provided in the installation groove 111a. The first limiting protrusion 137 can be limitedly cooperated with one of the slots.

[0077] like Figure 4-6 As shown, the shaft-shaped component 13 also includes a bearing 133, which is sleeved on the outer periphery of the fixed shaft 131 and is limitedly matched with the mounting groove 111a. Preferably, the bearing 133 of this embodiment is a plane thrust bearing 133, and after being assembled, its upper end surface is flush with the upper end surface of the first base portion 111. Therefore, the bearing 133 plays a role in limiting the first connector 132 and enhancing stability.

[0078] The shaft-shaped component 13 further includes a first retaining spring 134 and a second retaining spring 135. The fixed shaft 131 is provided with a first limiting groove 131b and a second limiting groove 131c. The first retaining spring 134 is sleeved on the outer periphery of the first limiting groove 131b and is located between the movable sleeve 14 and the bearing 133. The second retaining spring 135 is sleeved on the second limiting groove 131c and is located between the first connector 132 and the bottom of the mounting groove 111a. Thus, the arrangement of the first retaining spring 134 and the second retaining spring 135 can prevent the fixed shaft 131 from displacement in the length direction.

[0079] Preferably, a third limiting groove 132a which cooperates with the fixed shaft 131 is provided at the center of the first connecting head 132, and a limiting plane 131d which cooperates with the third limiting groove 132a is provided at the lower end of the fixed shaft 131. Thus, the first connecting head 132 and the fixed shaft 131 are relatively fixed, and the axial rotation of the fixed shaft 131 can be effectively avoided by only limiting the first connecting head 132.

[0080] Preferably, the bottom of the fixing shaft 131 can penetrate the bottom of the installation groove 111 a and extend out of the first base portion 111 .

[0081] The first rotating device 1 also includes a locking screw 18. The first mounting member 11 is provided with a threaded hole 111b connected to the mounting groove 111a. The locking screw 18 is detachably mounted in the threaded hole 111b. The locking screw 18 is threadably matched with the threaded hole 111b and can abut against the first connector 132.

[0082] Preferably, in order to strengthen the locking force, an outer wall of the first connector 132 may be provided with an external thread 132b.

[0083] like Figure 10-13 As shown, the second rotating device 2 of this embodiment at least includes:

[0084] A third mounting member 21 is mounted on the door frame 300;

[0085] A fourth mounting member 22 is mounted on the door leaf 200;

[0086] A reset assembly 23, connecting the third mounting member 21 and the fourth mounting member 22;

[0087] The reset assembly 23 includes a reset torsion spring 232 and a second connector 231. The second connector 231 is sleeved in the fourth mounting member 22. One end of the reset torsion spring 232 is connected to the fourth mounting member 22, and the other end is connected to the first end of the second connector 231. The second end of the second connector 231 is connected to the third mounting member 21.

[0088] The second rotating device 2 further includes a slider 24 and a locking screw 25. The third mounting member 21 includes a second base portion 211 and a second extension portion 212. The second extension portion 212 extends in a direction perpendicular to the second base portion 211 and is provided with a fifth connection hole 212a. The second extension portion 212 is fixedly connected to the door frame 300 by the cooperation of the screw and the fifth connection hole 212a.

[0089] The second base portion 211 is provided with a second slot-shaped limiting structure 211a capable of limiting the second connector 231 from rotating in the axial direction; specifically, the second slot-shaped limiting structure 211a may be a regular hexagonal slot, and one end of the second connector 231 that matches the second slot-shaped limiting structure 211a may be a hexagonal column.

[0090] The slider 24 is detachably mounted on the second base portion 211 and forms a second groove-type limiting structure 211a together with the second base portion 211; thus, the setting of the slider 24 facilitates the detachability of the second connecting head 231 and the fourth mounting member 22, which is convenient for maintenance or replacement.

[0091] The locking screw 25 cooperates with the slider 24 and the second base portion 211 to lock the slider 24 to the second base portion 211 .

[0092] Specifically, the slider 24 of this embodiment is movably mounted on the second base portion 211. The second base portion 211 is provided with a guide groove 211c, and both sides of the slider 24 are provided with limiting edges 241 that cooperate with the guide groove 211c. The slider 24 is provided with a first limiting half groove 242, and the bottom of the guide groove 211c is provided with a second limiting half groove 211d. When the slider 24 is mounted on the second base portion 211, the first limiting half groove 242 and the second limiting half groove 211d are enclosed together to form a second groove-type limiting structure 211a.

[0093] The second base portion 211 on both sides of the second limiting half groove 211 d is provided with seventh connection holes 211 b for the locking screws 25 to pass through.

[0094] The fourth mounting member 22 includes a second cylindrical body 222, a second base plate 221 and a second end cover 223. The second base plate 221 is fixedly connected to the door leaf 200, the second cylindrical body 222 extends in a direction perpendicular to the second base plate 221, a second accommodating cavity is formed inside the second cylindrical body 222, the return torsion spring 232 is located in the second accommodating cavity, and the second end cover 223 is arranged at one end of the second cylindrical body 222 away from the second base plate 221 and connected to the second cylindrical body 222. The second base plate 221 is provided with a sixth connecting hole 221a, and the second base plate 221 is fixedly connected to the door leaf 200 by the cooperation of the screw and the sixth connecting hole 221a. A second limiting protrusion 223a is provided at one end of the second end cover 223, a third limiting protrusion 231a is provided at one end of the second connecting head 231, one end of the return torsion spring 232 is connected to the second limiting protrusion 223a, and the other end is connected to the third limiting protrusion 231a, and the second substrate 221 can limit the second connecting head 231.

[0095] The present invention provides a door with a new structure and an automatic slow closing function. The door has an automatic slow closing function. The specific working principle is as follows: when the door leaf 200 is moved away from the door frame 300 by an external force such as a user pushing the door, the return torsion spring 232 installed on the return assembly 23 stores elastic potential energy; when the external force disappears, the door leaf 200 automatically moves closer to the door frame 300 under the action of the restoring force of the return torsion spring 232. During the door closing process, the door leaf 200 drives the second mounting member 12 to rotate relative to the shaft-shaped member 13, drives the movable sleeve 14 to move in the second mounting member 12, and the movable sleeve 14 moves in the second mounting member 12. Under the sliding cooperation between the first pin shaft 16 and the first slide groove 141 and the sliding cooperation between the second pin shaft 17 and the second slide groove 142, the first rotating device 1 moves along the length direction of the shaft-shaped component 13, thereby generating thrust on the damper 15, and the damper 15 generates a reverse thrust, thereby preventing the second mounting member 12 from rotating too quickly to the right position, thereby playing a buffering role and achieving the effect of slowly closing the door; after closing the door, due to the self-gravity of the door leaf 200 and the effect of the reset torsion spring 232, the reverse thrust of the damper 15 cannot drive the second mounting member 12 to rotate without the action of external force, that is, the door cannot be opened automatically. In addition, the first rotating device 1 adopts a mechanical structure for buffering, and there is no need to set a reset torsion spring 232 inside, nor to inject damping oil into the cavity. The second rotating device 2 also only achieves mechanical reset through the reset torsion spring 232, and there is no need to inject damping oil into the cavity. It can not only meet the normal use in a low temperature environment and greatly improve the adaptability of the product, but also has a simple structure and low cost.

[0096] Example 2

[0097] Fig.14 A door with an automatic slow closing function according to another embodiment of the present invention is schematically shown.

[0098] like Fig.14 As shown, the structure of the door with automatic slow closing function of this embodiment is basically the same as the structure of the door with automatic slow closing function of Example 1, the difference is that the structure of the first connecting head 132 of the first rotating device 1 is different, and the shape of the corresponding installation groove 111a is different.

[0099] like Fig.14 As shown, the first limiting protrusion 137 of this embodiment is arranged on the first connecting head 132, and the first limiting protrusion 137 is formed by the first connecting head 132 protruding outward, and the first slot-type limiting structure 136 is installed in the installation groove 111a, and the first slot-type limiting structure 136 is formed by the installation groove 111a extending outward.

[0100] Example 3

[0101] Fig.15A door with an automatic slow closing function according to yet another embodiment of the present invention is schematically shown.

[0102] like Fig.15 As shown, the structure of the door with automatic slow closing function of this embodiment is basically the same as the structure of the door with automatic slow closing function of Example 1, except that: (1) the shape of the first pin shaft 16 of the first rotating device 1 is different; (2) the first rotating device 1 also includes a fixing sleeve 19.

[0103] See also Figure 5-6 as well as Fig.15 In this embodiment, the first pin shaft 16 passes through the first tubular body 121 and the first slide groove 141 of the second mounting member 12, and the fixed sleeve 19 is sleeved on the outer periphery of the first tubular body 121 and can limit the two ends of the first pin shaft 16. In this way, this embodiment does not need to flatten the two ends of the installed first pin shaft 16 to form rivets like Example 1, but directly limits the first pin shaft 16 through the fixed sleeve 19, and then fixes the fixed sleeve 19 and the first substrate 122 by welding. Compared with Example 1, the first pin shaft 16 can be shielded to improve the aesthetics.

[0104] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A door with an automatic slow closing function, comprising a door leaf (200), a door frame (300), and a top and bottom hinge (100) connecting the door leaf (200) and the door frame (300), wherein the top and bottom hinge (100) comprises a first rotating device (1) and a second rotating device (2), characterized in that: The first rotating device (1) comprises at least: A first mounting member (11), mounted on the door frame (300); A second mounting member (12) mounted on the door leaf (200); An axial component (13), one end of which is fixedly sleeved on the first mounting member (11); A movable sleeve (14) is movably mounted on the other end of the shaft-shaped component (13) and is mounted inside the second mounting member (12); A damper (15) is sleeved in the second mounting member (12) and matched with the movable sleeve (14); A first pin (16) connecting the second mounting member (12) and the movable sleeve (14); A second pin (17) connecting the movable sleeve (14) and the shaft-shaped component (13); A first sliding groove (141) is provided on the movable sleeve (14) and is limitedly matched with the first pin shaft (16); A second sliding groove (142) is provided on the movable sleeve (14) and is limitedly matched with the second pin shaft (17); The second mounting member (12) can be movably mounted on the shaft-shaped component (13) and can limit the position of the movable sleeve (14), the damper (15) and the second pin shaft (17); Two ends of the damper (15) are respectively against the movable sleeve (14) and the second mounting member (12); The second rotating device (2) comprises at least: A third mounting member (21), mounted on the door frame (300); A fourth mounting member (22) mounted on the door leaf (200); A reset assembly (23) connecting the third mounting member (21) and the fourth mounting member (22); The reset assembly (23) comprises a reset torsion spring (232) and a second connector (231); the second connector (231) is sleeved in the fourth mounting member (22); one end of the reset torsion spring (232) is connected to the fourth mounting member (22), and the other end is connected to the first end of the second connector (231); the second end of the second connector (231) is connected to the third mounting member (21).

2. The door with automatic slow closing function according to claim 1, characterized in that: The first mounting member (11) comprises a first base portion (111) and a first extension portion (112); the first extension portion (112) extends in a direction perpendicular to the first base portion (111) and is connected to the door frame (300); a mounting groove (111a) is provided on the first base portion (111); the shaft-shaped component (13) comprises a fixed shaft (131) and a first connecting head (132) capable of limiting the rotation of the fixed shaft (131) in an axial direction; the first connecting head (132) is fixedly mounted on the outer periphery of the fixed shaft (131) and is installed in the mounting groove (111a).

3. The door with automatic slow closing function according to claim 2, characterized in that: The second mounting member (12) comprises a first cylindrical body (121), a first base plate (122) and a first end cover (123); the first base plate (122) is connected to the door leaf (200); the first cylindrical body (121) extends in a direction perpendicular to the first base plate (122); a first accommodating cavity (121b) is formed inside the first cylindrical body (121); the movable sleeve (14) and the damper (15) are both located in the first accommodating cavity (121b); the first end cover (123) is arranged at a portion of the first cylindrical body (121) away from the first base plate (122). One end of the damper (15) is connected to the movable sleeve (14), and the other end is abutted against the first end cover (123). The fixed shaft (131) is provided with a first connecting hole (131a) matched with the second pin shaft (17). The second mounting member (12) is provided with a second connecting hole (121a) matched with the first pin shaft (16). The first sliding groove (141) is a special-shaped groove extending along the axial rotation direction of the movable sleeve (14), and the second sliding groove (142) is a strip groove extending along the length direction of the movable sleeve (14).

4. The door with automatic slow closing function according to claim 2, characterized in that: The first connector (132) is provided with a first slot-shaped limiting structure (136), and the mounting slot (111a) is provided with a first limiting protrusion (137) that cooperates with the first slot-shaped limiting structure (136) in a limiting manner; Alternatively, a first slot-shaped limiting structure (136) is provided in the installation slot (111a), and the first connector (132) is provided with a first limiting protrusion (137) that cooperates with the first slot-shaped limiting structure (136) in a limiting manner.

5. The door with automatic slow closing function according to claim 2, characterized in that: The shaft-shaped component (13) further comprises a bearing (133), wherein the bearing (133) is sleeved on the outer periphery of the fixed shaft (131) and is positionally matched with the mounting groove (111a).

6. The door with automatic slow closing function according to claim 5, characterized in that: The shaft-shaped component (13) further comprises a first retaining spring (134) and a second retaining spring (135); a first limiting groove (131b) and a second limiting groove (131c) are provided on the fixed shaft (131); the first retaining spring (134) is sleeved on the outer periphery of the first limiting groove (131b) and is located between the movable sleeve (14) and the bearing (133); the second retaining spring (135) is sleeved on the second limiting groove (131c) and is located between the first connector (132) and the bottom of the mounting groove (111a).

7. The door with automatic slow closing function according to any one of claims 1 to 6, characterized in that: The first rotating device (1) further comprises a fixing sleeve (19), wherein the fixing sleeve (19) is sleeved on the outer circumference of the second mounting member (12) and is capable of limiting the position of the first pin shaft (16).

8. The door with automatic slow closing function according to any one of claims 2 to 6, characterized in that: The first rotating device (1) also includes a locking screw (18); a threaded hole (111b) connected to the mounting groove (111a) is provided on the first mounting member (11); the locking screw (18) is detachably mounted on the threaded hole (111b); the locking screw (18) is threadably matched with the threaded hole (111b) and can be abutted against the first connecting head (132).

9. The door with automatic slow closing function according to any one of claims 1 to 6, characterized in that: The second rotating device (2) further comprises a sliding block (24) and a locking screw (25); the third mounting member (21) comprises a second base portion (211) and a second extending portion (212); the second extending portion (212) extends in a direction perpendicular to the second base portion (211) and is fixedly connected to the door frame (300); The second base portion (211) is provided with a second groove-shaped limiting structure (211a) capable of limiting the second connector (231) from rotating in the axial direction; The sliding block (24) is detachably mounted on the second base portion (211) and together with the second base portion (211) forms the second groove-shaped limiting structure (211a); The locking screw (25) cooperates with the sliding block (24) and the second base portion (211) and is used to lock the sliding block (24) to the second base portion (211).

10. The door with automatic slow closing function according to any one of claims 1 to 6, characterized in that: The fourth mounting member (22) comprises a second cylindrical body (222), a second base plate (221) and a second end cover (223), wherein the second base plate (221) is connected to the door leaf (200), the second cylindrical body (222) extends in a direction perpendicular to the second base plate (221), a second accommodating cavity is formed inside the second cylindrical body (222), the return torsion spring (232) is located in the second accommodating cavity, and the second end cover (223) is arranged at a distance from the second cylindrical body (222). The second end cover (223) is separated from one end of the second substrate (221) and connected to the second cylindrical body (222), one end of the second end cover (223) is provided with a second limiting protrusion (223a), one end of the second connecting head (231) is provided with a third limiting protrusion (231a), one end of the return torsion spring (232) is connected to the second limiting protrusion (223a), and the other end is connected to the third limiting protrusion (231a), and the second substrate (221) can limit the second connecting head (231).

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