Spring hinge capable of automatically closing door

Abstract

The utility model discloses an automatic door closing spring hinge which comprises a hinge body, a return spring and a limiting component. The hinges are fixedly arranged on the outer sides of the door frame and the door leaf respectively; the return spring is fixedly arranged in the hinge; the limiting parts are fixedly arranged on one sides of the hinges respectively; in the actual use process, the door leaf is pushed through the return spring, so that the hinge can slowly and automatically close the door, a door handle is prevented from impacting a wall surface while the door is kept normally open through the limiting component, indoor building loss and maintenance cost are reduced, and secondly, the hinge is simple in structure, common in material, low in manufacturing cost and convenient to use. Therefore, the effect of convenient maintenance and replacement is achieved. In addition, by optimizing the mechanical structure of the hinge, the wear resistance is remarkably improved, the stability and durability under long-term use are ensured, the overall cost is reduced, and the hinge has the capacity of bearing a large-size and heavy-weight door leaf.

Description

Technical Field

[0001] The embodiments of the utility model belong to the technical field of hinges, and more specifically, relate to an automatic door closing spring hinge. Background Art

[0002] Hinge, also known as hinge, is a mechanical device used to connect two objects and allow them to rotate relative to each other. It is widely used in the opening and closing of doors, windows, furniture, cabinets, etc. Hinge achieves the function of rotation or swing by connecting two metal plates with pins or screws. This design enables the hinge to maintain structural stability while allowing objects such as doors or windows to open and close smoothly.

[0003] With the continuous advancement of science and technology and the growing demand for personalized home and office environments, the types and functionality of hinges are also constantly expanding and improving. Among them, the Chinese patent with document number CN113585899A discloses a buffer safety automatic door closing hinge, including a fixed seat, a movable seat, an elastic member arranged in the fixed seat, a damping member arranged in the movable seat, and a connecting member connecting the elastic member and the damping member; the connecting member includes a connecting head hinged to the fixed seat, a connecting rod connecting the elastic member and the connecting head, and a damping joint connecting the damping member and the connecting head; a hinge shaft is provided between the fixed seat and the movable seat, and the hinge shaft and the rotation axis of the connecting member are not colinear. A first connecting shaft is provided between the connecting head and the fixed seat, a second connecting shaft is provided between the connecting head and the connecting rod, and a third connecting shaft is provided between the connecting head and the damping joint, and the distance between the first connecting shaft and the second connecting shaft is less than the distance between the first connecting shaft and the third connecting shaft.

[0004] Although the Chinese patent with document number CN113585899A can make the door close automatically and slowly through its solution, thereby improving the user experience, it cannot avoid some problems existing in the existing hinge technology, such as: (1) the use of a complex system of multiple components and connecting columns to achieve automatic door closing may lead to high manufacturing costs and increased assembly difficulty; (2) due to the complexity of the system, it may be worn or damaged after long-term use, requiring professional maintenance personnel to maintain and replace, which may increase maintenance costs. Utility Model Content

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides an automatic door closing spring hinge, which pushes the door leaf through the return spring to enable the hinge to close the door slowly and automatically, and while the door is kept open by the limiting component, the door handle is prevented from hitting the wall, thereby reducing indoor building losses and maintenance costs. Secondly, the hinge structure of the present invention is simple, the materials are common, and the cost is reduced, thereby achieving the effect of cheap maintenance and replacement; in addition, by optimizing the mechanical structure of the hinge, not only the wear resistance is significantly improved, the stability and durability under long-term use are ensured, and the overall cost is reduced, but also the hinge has the ability to carry large-sized and heavy-weight door leaves.

[0006] In order to achieve the above-mentioned object, the utility model provides an automatic door closing spring hinge, comprising: a hinge, a return spring and a limit component;

[0007] The hinge comprises: a first hinge plate, a second hinge plate and a connecting piece, and the first hinge plate is rotatably connected to the second hinge plate through the connecting piece;

[0008] The return spring comprises: a return spring body and a support plate; the return spring body is fixedly sleeved on the outside of the connecting piece; the two support plates are respectively fixedly arranged at both ends of the return spring body;

[0009] The limiting component includes: a limiting pin, a limiting spring, a limiting ball, a first fixed support and a second fixed support; the limiting pin is detachably fixed on the outer surface of the second hinge plate; one end of the limiting spring is fixedly connected to the limiting ball, and the other end is detachably connected to the second fixed support; the first fixed support is detachably fixed on the outer surface of the first hinge plate and corresponds to the position of the limiting pin; the second fixed support is detachably fixed on the outer surface of the first hinge plate, and two second fixed supports are symmetrically arranged with respect to the first fixed support.

[0010] Furthermore, the limit latch is a square block or a round column as a whole, and corresponding spherical grooves of the same size are fixedly provided on both sides thereof, and the spherical grooves are adapted to the limit contact beads.

[0011] Furthermore, the first fixed support is a square groove as a whole, and through holes adapted to the limit beads are fixedly provided on both sides of the square groove, and the square groove is adapted to the limit pin, so that the limit bead passes through the square groove and falls into the spherical groove on the side of the limit pin.

[0012] Furthermore, the position-limiting bumper is mainly made of materials such as stainless steel or plastic.

[0013] Furthermore, when the limit spring is in a natural state, the total length when it is fixedly connected to the limit bead is L1, the distance between the two second fixed supports is L2, and 1.5 times L1≤L2<2 times L1.

[0014] Furthermore, the size of the support plate is increased or decreased according to the weight of the door leaf, so that the return spring can adjust the speed of the door leaf when closing.

[0015] Furthermore, the limiting component includes: a converging tube; the converging tube is fixedly arranged between the first fixed support and the second fixed support, and one end of the converging tube is detachably connected to the first fixed support.

[0016] Furthermore, the inner diameter of the contracting tube is larger than the outer diameter of the limit spring and the diameter of the limit ball.

[0017] Furthermore, there are multiple return springs sleeved on the connecting piece.

[0018] Furthermore, there are multiple limiting components on one side of the hinge.

[0019] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0020] (1) The spring hinge of the utility model pushes the door leaf through the return spring, so that the hinge can close the door slowly and automatically, and at the same time, the door is kept open by the limiting component, thereby preventing the door handle from hitting the wall, thereby reducing indoor building wear and maintenance costs. Secondly, the hinge structure of the utility model is simple, the materials are common, and the cost is reduced, thereby achieving the effect of cheap maintenance and replacement; in addition, by optimizing the mechanical structure of the hinge, not only the wear resistance is significantly improved, the stability and durability under long-term use are ensured, and the overall cost is reduced, but also the hinge has the ability to bear large-sized and heavy-weight door leaves.

[0021] (2) The spring hinge of the utility model can adapt to door leaves of different weights and adjust the closing speed of the door leaves by adjusting the size of the support plate.

[0022] (3) The spring hinge of the utility model reduces the opening speed of the door leaf and improves safety by providing a plurality of return springs.

[0023] (4) The spring hinge of the utility model provides stability to the spring hinge by providing a plurality of the bundling tubes to accommodate the limit springs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a spring hinge in Embodiment 1 of the utility model;

[0025] Figure 2 This is a front view of the spring hinge of Example 1 of the utility model;

[0026] Figure 3 This is a schematic structural diagram of a return spring in Embodiment 1 of the utility model;

[0027] Figure 4 This is a structural schematic diagram of the limiting latch inserted into the first fixed support in Example 1 of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of multiple return springs in Example 2 of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of multiple limiting components in Example 3 of the utility model.

[0030] In all the drawings, the same figure marks represent the same technical features, specifically: 1-hinge, 11-first hinge plate, 12-second hinge plate, 13-connecting piece, 2-return spring, 21-return spring body, 22-support plate, 3-limiting component, 31-limiting pin, 32-limiting spring, 33-limiting bead, 34-first fixed support, 35-second fixed support, 36-closing tube. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] like Figures 1 to 4 As shown, embodiment 1 of the present invention provides an automatic door closing spring hinge, including: a hinge 1, a return spring 2 and a limiting component 3; the hinge 1 is respectively fixed on the outside of the door frame and the door leaf; the return spring 2 is fixed inside the hinge 1; the limiting component 3 is respectively fixed on one side of the hinge 1; in actual use, the return spring 2 pushes the door leaf to enable the hinge 1 to automatically close the door slowly, and while the door is kept open by the limiting component 3, the door handle is prevented from hitting the wall, thereby reducing indoor building loss and maintenance costs. Secondly, the hinge of the present invention has a simple structure, common materials, and reduces the cost, thereby achieving the effect of cheap maintenance and replacement; in addition, by optimizing the mechanical structure of the hinge, not only the wear resistance is significantly improved, the stability and durability under long-term use are ensured, and the overall cost is reduced, but also the hinge has the ability to carry large-sized and heavy-weight door leaves.

[0034] Specifically, Figure 1 and Figure 2 As shown, the hinge 1 is fixedly arranged on the door frame and the outer side of the door leaf, respectively, for supporting and stabilizing the door leaf, and comprises: a first hinge plate 11, a second hinge plate 12 and a connecting member 13;

[0035] Preferably, the first hinge plate 11 is rotatably connected to the second hinge plate 12 via the connecting member 13;

[0036] Preferably, the first hinge plate 11 is fixedly provided with a plurality of through holes for fixed connection with the door frame;

[0037] Preferably, the second hinge plate 12 is fixedly provided with a plurality of through holes for fixed connection with the door leaf;

[0038] Specifically, Figures 1 to 4 As shown, the return spring 2 is fixedly arranged inside the hinge 1, and is used to enable the hinge 1 to close the door slowly and automatically, and comprises: a return spring body 21 and a support plate 22;

[0039] The return spring body 21 is fixedly sleeved on the outside of the connecting member 13;

[0040] The two support plates 22 are fixedly disposed at two ends of the return spring body 21 respectively;

[0041] Preferably, the two support plates 22 are fixedly arranged on the same side of the hinge 1 and contact the first hinge plate 11 and the second hinge plate 12 respectively;

[0042] Preferably, when the door leaf is opened, the two support plates 22 are located between the first hinge plate 11 and the second hinge plate 12;

[0043] Preferably, the size of the support plate 22 is increased or decreased according to the weight of the door leaf, so that the return spring 2 can adjust the speed of the door leaf when closing;

[0044] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the limiting components 3 are respectively fixedly arranged on one side of the hinge 1, and are used to keep the door normally open while preventing the door handle from hitting the wall. The limiting components 3 include: a limiting latch 31, a limiting spring 32, a limiting bead 33, a first fixed support 34, a second fixed support 35 and a converging tube 36;

[0045] The limiting latch 31 is detachably fixed on the outer surface of the second hinge plate 12;

[0046] Preferably, the limit latch 31 is a square block or a round column as a whole, and corresponding spherical grooves of the same size are fixedly provided on both sides thereof;

[0047] One end of the limit spring 32 is fixedly connected to the limit bead 33, and the other end is detachably connected to the second fixed support 35;

[0048] Preferably, the inner diameter of the limit spring 32 is smaller than the diameter of the limit bead 33, so that a part of the limit bead 33 is sunk into the limit spring 32;

[0049] Preferably, when the limit spring 32 is in a natural state, the total length when it is fixedly connected to the limit bead 33 is L1;

[0050] Preferably, the position-limiting bead 33 is mainly made of materials such as stainless steel or plastic;

[0051] The first fixing support 34 is detachably fixed on the outer surface of the first hinge plate 11 and corresponds to the position of the limiting latch 31;

[0052] Preferably, the first fixed support 34 is a square groove as a whole, through holes adapted to the limit ball 33 are fixedly provided on both sides of the square groove, and the square groove is adapted to the limit pin 31, so that the limit ball 33 passes through the square groove and falls into the spherical groove on the side of the limit pin 31;

[0053] The second fixing support 35 is detachably fixed to the outer surface of the first hinge plate 11;

[0054] Preferably, the two second fixing supports 35 are symmetrically arranged with respect to the first fixing support 34;

[0055] Preferably, the distance between the two second fixing supports 35 is L2, and 1.5 times L1≤L2<2 times L1;

[0056] The bundling tube 36 is fixedly disposed between the first fixed support 34 and the second fixed support 35, and is used to accommodate the limit spring to provide stability to the spring hinge;

[0057] Preferably, one end of the bunching tube 36 is detachably connected to the first fixed support 34;

[0058] Preferably, the inner diameter of the converging tube 36 is larger than the outer diameter of the limiting spring 32 and the diameter of the limiting bumping ball 33, and the central axis thereof is colinear with the axis of the through hole on one side of the first fixing support 34;

[0059] The working principle of the utility model is as follows: determine the number of the spring hinges and the size of the support plate 22 according to the size and weight of the door leaf, sleeve the support plate 22 on the outside of the connecting piece 13, and assemble the hinge 1; assemble the two converging tubes 36 to both sides of the first fixed support 34, and fix the limiting latch 31 and the first fixed support 34 to the appropriate positions of the second hinge plate 12 and the first hinge plate 11 respectively; drop the connected limiting spring 32, the limiting bead 33 and the first fixed support 34 into the converging tube 36 with one end of the limiting bead 33 until the converging tube 36 contacts the second fixed support 35, The second fixed support 35 is connected to the first hinge plate 11 to complete the assembly of the spring hinge, and then it is fixed to the door frame and the outside of the door leaf through the through holes of the first hinge plate 11 and the second hinge plate 12 respectively; the spring hinge completes the automatic closing of the door leaf through the return spring 2; if the door leaf needs to be kept normally open, the door leaf is opened in the opening direction until the limit latch 31 falls into the first fixed support 34 to complete the normal opening of the door leaf; if the door leaf needs to be closed when it has been kept normally open, it only needs to be pulled in the closing direction until the limit latch 31 is separated from the first fixed support 34, and then the door leaf can be waited for to close automatically.

[0060] Example 2

[0061] like Figure 5 As shown, based on Example 1, in Example 2 of the present invention, there are multiple return springs 2 sleeved on the connecting member 13, which are used to slow down the opening speed of the door leaf and improve safety.

[0062] Other technical features are the same as those in Example 1 and can achieve the same technical effects, which will not be described in detail here.

[0063] Example 3

[0064] like Figure 6 As shown, based on Example 2, in Example 3 of the present invention, there are multiple limiting components 3 on one side of the hinge 1, which are used to adapt to large-sized and heavy door leaves to increase safety.

[0065] Other technical features are the same as those in Example 1 and can achieve the same technical effects, which will not be described in detail here.

[0066] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0067] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0068] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; those skilled in the art will easily understand that the above are only preferred embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic door closing spring hinge, characterized in that: include: Hinge (1), return spring (2) and limiting component (3); The hinge (1) comprises: a first hinge plate (11), a second hinge plate (12) and a connecting member (13), and the first hinge plate (11) is rotatably connected to the second hinge plate (12) via the connecting member (13); The return spring (2) comprises: a return spring body (21) and a support plate (22); the return spring body (21) is fixedly sleeved on the outside of the connecting piece (13); the two support plates (22) are respectively fixedly arranged at two ends of the return spring body (21); The limiting component (3) comprises: a limiting pin (31), a limiting spring (32), a limiting ball (33), a first fixed support (34) and a second fixed support (35); the limiting pin (31) is detachably fixed on the outer surface of the second hinge plate (12); one end of the limiting spring (32) is fixedly connected to the limiting ball (33), and the other end is detachably connected to the second fixed support (35); the first fixed support (34) is detachably fixed on the outer surface of the first hinge plate (11) and corresponds to the position of the limiting pin (31); the second fixed support (35) is detachably fixed on the outer surface of the first hinge plate (11), and two second fixed supports (35) are symmetrically arranged with respect to the first fixed support (34).

2. The spring hinge according to claim 1, characterized in that: The limiting latch (31) is a square block or a round column as a whole, and corresponding spherical grooves of the same size are fixedly provided on both sides thereof, and the spherical grooves are adapted to the limiting contact beads (33).

3. The spring hinge according to claim 2, characterized in that: The first fixed support (34) is a square groove as a whole, and through holes adapted to the limit bead (33) are fixedly provided on both sides of the square groove, and the square groove is adapted to the limit pin (31), so that the limit bead (33) passes through the square groove and falls into the spherical groove on the side of the limit pin (31).

4. The spring hinge according to any one of claims 1 to 3, characterized in that: The position-limiting bumping bead (33) is mainly made of materials such as stainless steel or plastic.

5. The spring hinge according to any one of claims 1 to 3, characterized in that: When the limit spring (32) is in a natural state, the total length when it is fixedly connected to the limit bead (33) is L1, the distance between the two second fixed supports (35) is L2, and 1.5 times L1≤L2<2 times L1.

6. The spring hinge according to any one of claims 1 to 3, characterized in that: The size of the support plate (22) is increased or decreased according to the weight of the door leaf, so that the return spring (2) can adjust the speed of the door leaf when closing.

7. The spring hinge according to any one of claims 1 to 3, characterized in that: The limiting component (3) comprises: a converging tube (36); the converging tube (36) is fixedly arranged between the first fixed support (34) and the second fixed support (35), and one end of the converging tube is detachably connected to the first fixed support (34).

8. The spring hinge according to claim 7, characterized in that: The inner diameter of the converging tube (36) is larger than the outer diameter of the limiting spring (32) and the diameter of the limiting bumping bead (33).

9. The spring hinge according to any one of claims 1 to 3, characterized in that: There are multiple return springs (2) sleeved on the connecting piece (13).

10. The spring hinge according to any one of claims 1 to 3, characterized in that: There are multiple limiting components (3) on one side of the hinge (1).

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