An automatic door closing device

Abstract

The utility model relates to door structure auxiliary device technical field discloses an automatic door closing device, including shell, tow assembly and adjusting assembly, the bottom of shell is equipped with base, the tow assembly is located between shell and base, is equipped with the pull cord on the tow assembly, the adjusting assembly is located between shell and tow assembly, the adjusting assembly includes knob and adjusting lever, the knob rotation is established on the shell, and is equipped with the rotation -stop structure between the shell, the adjusting lever one end extends to the shell, and is fixedly connected with the tow assembly, the adjusting lever other end is connected with the knob. Through setting shell, base, tow assembly and pull cord, when installing, only need to fix base on the door frame or door, then can complete basic installation with the fixed part on the door or door frame fixed with pull cord. Without like hydraulic type, the complicated hydraulic system is debugged and is installed, has reduced the installation difficulty and the requirement to the technical level of installation personnel greatly, has saved the installation time and manpower cost.

Description

Technical Field

[0001] This utility model relates to the field of door structure auxiliary device technology, and in particular to an automatic door closing device. Background Technology

[0002] Automatic door closing devices are widely used in daily life and various places, such as the entrances and exits of shopping malls, hotels, hospitals, office buildings, etc. They can automatically close the doors after they have been opened, which not only provides convenience for people, but also plays a role in maintaining the stability of the indoor environment (such as temperature, humidity, cleanliness, etc.), preventing insects or foreign objects from entering, and ensuring safety.

[0003] Currently, hydraulic automatic door closers are commonly used in most applications. They typically consist of a housing, hydraulic cylinder, piston, spring, regulating valve, and connecting components. The hydraulic cylinder contains hydraulic oil, and the piston reciprocates within this oil. The flow and pressure changes of the hydraulic oil achieve a soft, controlled closing of the door. The regulating valve controls the flow rate of the hydraulic oil, thereby adjusting the closing speed of the door. This type of door closer provides a smoother, more buffering effect during closing, reducing the impact force and preventing violent collisions between the door and the door frame.

[0004] However, the existing hydraulic automatic door closers have a relatively complex structure. During installation, professional personnel are required to perform precise adjustments to ensure the normal operation of the hydraulic system. The installation process is quite complicated, resulting in a long installation time. At the same time, it requires a high level of technical expertise from the installers.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide an automatic door closing device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic door closing device includes a housing, a traction component, and an adjusting component. The housing has a base at its bottom. The traction component is located between the housing and the base, and has a pull rope attached to it for pulling the rope. The adjusting component is located between the housing and the traction component for adjusting the traction force of the traction component. The adjusting component includes a knob and an adjusting rod. The knob is rotatably mounted on the housing, and an anti-rotation structure is provided between the housing and the housing to prevent the knob from rotating in the opposite direction. One end of the adjusting rod extends into the housing and is fixedly connected to the traction component; the other end of the adjusting rod is connected to the knob.

[0009] As further explained, the knob includes a rotating body and a rotating cover disposed on the rotating body; the other end of the adjusting rod extends between the rotating body and the rotating cover, and is connected to a first limiting part located between the rotating body and the rotating cover; there is a certain gap between the first limiting part and the rotating body, and a spring for rebound reset is provided between the first limiting part and the rotating body.

[0010] As a further explanation, the middle part of the adjusting rod is provided with a second limiting part located inside the outer shell; a limiting groove is provided between the second limiting part and the outer shell.

[0011] As further explained, the anti-rotation structure includes multiple sets of circumferentially arranged bosses in the center of the outer shell; the bottom end of the knob is provided with multiple sets of abutment grooves corresponding to the bosses.

[0012] As further explained, the top surface of the boss is an inclined surface structure with a height that gradually decreases from one end of the boss to the other.

[0013] As further explained, the traction assembly includes a fixing frame and a coil spring; the fixing frame is disposed between the housing and the base; the coil spring is disposed between the fixing frame and the base, and the coil spring is connected to a pull rope.

[0014] As a further explanation, the adjusting rod has a first fixing groove at one end near the coil spring, and the first end of the coil spring is fixed in the first fixing groove; the fixing frame has a second fixing groove, and the end of the coil spring is fixed in the second fixing groove.

[0015] As further explained, the pull cord is provided with a retaining ring away from the outer casing for connection with a door fastener.

[0016] As a further explanation, a roller is provided between the outer shell and the base to abut against the pull rope, and the roller is rotatably connected to the outer shell and the base respectively.

[0017] As a further explanation, a loop is provided between the outer shell and the pull cord.

[0018] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0019] By incorporating a housing, base, traction assembly, and pull rope, installation is simple: just fix the base to the door frame or door, and then secure the pull rope to the fasteners on the door or door frame. Unlike hydraulic systems, this eliminates the need for complex hydraulic system adjustments and installations, significantly reducing installation difficulty and the skill requirements for installers, thus saving installation time and labor costs. Furthermore, the adjustable assembly allows users to adjust a knob according to their needs. The knob moves an adjusting rod, altering the tension or compression of the coil spring, thereby adjusting the pull rope's traction force to suit different locations and usage scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the overall structure of an automatic door closing device provided by this utility model;

[0022] Figure 2 An exploded view of an automatic door closing device provided by this utility model;

[0023] Figure 3 A schematic diagram of the internal structure of an automatic door closing device provided by this utility model;

[0024] Figure 4 A schematic diagram of the traction assembly provided by this utility model;

[0025] Figure 5 A schematic diagram of the overall structure of the outer shell and anti-rotation structure provided by this utility model;

[0026] Figure 6 A schematic diagram of the overall structure of the knob provided by this utility model.

[0027] The following are the labeling elements in the figure:

[0028] 10. Outer casing; 11. Base; 12. Casters; 13. Cable guide ring;

[0029] 20. Traction assembly; 21. Fixing frame; 211. Second fixing slot; 22. Coil spring;

[0030] 30. Adjustment component; 31. Knob; 311. Rotating body; 312. Rotating cover; 313. Abutment groove; 32. Adjustment rod; 321. First limiting part; 322. Second limiting part; 323. First fixing groove; 33. Spring;

[0031] 40. Anti-rotation structure; 41. Boss;

[0032] 50. Pull rope; 51. Fixing ring. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] In one embodiment of this utility model, such as Figure 1-6 As shown, an automatic door closing device is provided. This automatic door closing device is generally fixed on the door frame or the door. It is usually used in combination with fixing parts on the corresponding door or door frame, such as hooks, nails and other objects that can be fixed.

[0039] Specifically, an automatic door closing device includes a housing 10, a traction assembly 20, and an adjusting assembly 30. A base 11 is provided at the bottom of the housing 10. The traction assembly 20 is disposed between the housing 10 and the base 11, and a pull rope 50 is provided on the traction assembly 20 for pulling the rope 50. The adjusting assembly 30 is disposed between the housing 10 and the traction assembly 20 for adjusting the traction force of the traction assembly 20. The adjusting assembly 30 includes a knob 31 and an adjusting rod 32. The knob 31 is rotatably mounted on the housing 10, and an anti-rotation structure 40 is provided between the housings to prevent the knob 31 from rotating in the opposite direction. One end of the adjusting rod 32 extends into the housing 10 and is fixedly connected to the traction assembly 20. The other end of the adjusting rod 32 is connected to the knob 31.

[0040] In this embodiment, the bottom end of the base 11 is fixed to the door frame or door. The base 11 can be fixed by providing an adhesive layer at the bottom end of the base 11 and then sticking it to the door frame or door with the adhesive layer. Alternatively, it can be fixed to the door frame or door with fixing tools, such as locking the base 11 to the door frame or door with screws, or fixing the base 11 to the door frame or door with a snap-fit ​​and slot. The specific choice should be made by the designer according to the actual use case, so no specific limitation is made.

[0041] By incorporating the housing 10, base 11, traction component 20, and pull rope 50, installation is simple: just fix the base 11 to the door frame or door, and then secure the pull rope 50 to the fasteners on the door or door frame. Unlike hydraulic systems, there's no need for complex hydraulic system adjustments and installations, significantly reducing installation difficulty and the skill requirements for installers, saving installation time and labor costs. Furthermore, the adjustable component 30 allows users to adjust the rotary knob 31 according to their needs. The knob 31 moves the adjusting rod 32, changing the tension or compression of the coil spring 22, thus adjusting the traction force of the pull rope 50 to suit different locations and usage scenarios.

[0042] Preferably, the knob 31 includes a rotating body 311 and a rotating cover 312 disposed on the rotating body 311. The other end of the adjusting rod 32 extends between the rotating body 311 and the rotating cover 312, and is connected to a first limiting part 321 located between the rotating body 311 and the rotating cover 312. There is a certain gap between the first limiting part 321 and the rotating body 311, and a spring 33 for springback reset is provided between the first limiting part 321 and the rotating body 311. By setting a first limiting part 321 and a spring 33, and having a certain gap between the first limiting part 321 and the rotating body 311, when it is necessary to adjust the traction force of the pull rope 50, the rotating body 311 of the knob 31 is pulled upward, so that the gap between the first limiting part 321 and the rotating body 311 moves upward, that is, the bottom end of the rotating body 311 is disengaged from the anti-rotation structure 40. In this state, the rotating body 311 is turned, and the rotating body 311 drives the adjusting rod 32 to move, thereby changing the degree of tension or compression of the traction component 20, making the traction force adjustment more convenient and quick. Ordinary users can operate it without professional training, avoiding the operational difficulties caused by the complex structure, and improving the ease of use of the device.

[0043] Furthermore, the adjusting rod 32 has a second limiting part 322 located inside the housing 10 at its middle portion. A limiting groove is provided between the second limiting part 322 and the housing 10. By setting the second limiting part 322 and the limiting groove, the adjusting rod 32 can be precisely limited during movement, ensuring the stability and reliability of the adjusting assembly 30, reducing failures caused by unstable component movement, lowering maintenance frequency and cost, and improving the overall performance of the device.

[0044] Preferably, the anti-rotation structure 40 includes multiple sets of circumferentially arranged bosses 41 in the center of the outer casing 10. The bottom end of the knob 31 is provided with multiple sets of abutment grooves 313 corresponding to the bosses 41. By setting the bosses 41 and abutment grooves 313, and by the mutual abutment between the bosses 41 and abutment grooves 313, a mechanical locking mechanism is formed, which can effectively prevent the knob 31 from rotating in the opposite direction after adjustment, thereby ensuring that the traction force set by the adjustment component 30 can be maintained stably and will not change due to the accidental rotation of the knob 31, thus ensuring the stability and reliability of the automatic door closing device during use.

[0045] Furthermore, the top surface of the boss 41 is an inclined surface structure whose height gradually decreases from one end to the other, forming a ratchet-like structure with the boss 41. By setting the boss 41 with an inclined surface structure whose height gradually decreases from one end to the other, the knob 31 can engage with the boss 41 more smoothly during rotation, reducing friction and wear, and extending the service life of the anti-rotation structure 40.

[0046] Preferably, the traction assembly 20 includes a fixing frame 21 and a coil spring 22. The fixing frame 21 is located between the housing 10 and the base 11. The coil spring 22 is located between the fixing frame 21 and the base 11, and the coil spring 22 is connected to the pull rope 50. By setting the fixing frame 21 and the coil spring 22, this design structure is compact, and the generation and adjustment of traction force are more direct and flexible. Compared with the hydraulic method of adjusting traction force through hydraulic oil pressure, the elastic characteristics of the coil spring 22 make the change of traction force more linear, which can more accurately meet the requirements of door closing traction force in different places and usage scenarios, thus improving the applicability of the device.

[0047] Furthermore, the adjusting rod 32 has a first fixing groove 323 near the end of the coil spring 22, and the head end of the coil spring 22 is fixed in the first fixing groove 323. The fixing bracket 21 has a second fixing groove 211, and the tail end of the coil spring 22 is fixed in the second fixing groove 211. By fixing the head end of the coil spring 22 to the first fixing groove 323 and fixing the tail end of the coil spring 22 to the second fixing groove 211, this fixing method allows the coil spring 22 to maintain a stable position and posture during stretching and compression, ensuring that the traction force can be accurately and stably transmitted to the pull rope 50, reducing energy loss, improving the closing effect and efficiency, extending the service life of the coil spring 22, and reducing maintenance costs.

[0048] Preferably, the pull cord 50 is provided with a retaining ring 51 for connection with the door fastener away from the housing 10. By providing a retaining ring 51 on the pull cord 50, the connection between the pull cord 50 and the door fastener becomes very simple and convenient. The connection can be completed simply by putting the retaining ring 51 on the fastener, without the need for additional tools or complicated operating steps.

[0049] Furthermore, a roller 12 is provided between the outer casing 10 and the base 11 to abut against the pull rope 50. The roller 12 is rotatably connected to both the outer casing 10 and the base 11. By providing the roller 12, the movement of the pull rope 50 is well guided and supported, allowing the pull rope 50 to move smoothly under the guidance of the roller 12. This reduces friction and collision with other internal components of the device, reduces the wear of the pull rope 50, extends the service life of the pull rope 50, and also reduces noise during movement, improving the comfort of use.

[0050] Furthermore, a cable guide ring 13 is provided between the housing 10 and the pull cord 50. By providing the cable guide ring 13, a smooth channel is provided for the pull cord 50, preventing direct contact between the pull cord 50 and the edge of the housing 10 when it passes through the housing 10. This reduces friction and wear, protects the surface quality of the pull cord 50, extends its service life, reduces noise during operation, improves user comfort, and reduces maintenance and replacement costs caused by wear and noise issues with the pull cord 50.

[0051] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. An automatic door closing device, characterized in that, include: The outer casing has a base at its bottom end; A traction assembly is disposed between the outer shell and the base, and a pull rope is provided on the traction assembly for pulling the pull rope; An adjustment assembly is disposed between the housing and the traction assembly for adjusting the traction force of the traction assembly; the adjustment assembly includes a knob and an adjustment rod; the knob is rotatably mounted on the housing, and an anti-rotation structure is provided between the housings to prevent the knob from rotating in the opposite direction; one end of the adjustment rod extends into the housing and is fixedly connected to the traction assembly; the other end of the adjustment rod is connected to the knob.

2. The automatic door closing device according to claim 1, characterized in that, The knob includes a rotating body and a rotating cover disposed on the rotating body; the other end of the adjusting rod extends between the rotating body and the rotating cover, and is connected to a first limiting part located between the rotating body and the rotating cover; there is a certain gap between the first limiting part and the rotating body, and a spring for rebound reset is provided between the first limiting part and the rotating body.

3. The automatic door closing device according to claim 2, characterized in that, The adjusting rod has a second limiting part located inside the outer shell in the middle; a limiting groove is provided between the second limiting part and the outer shell.

4. The automatic door closing device according to claim 1 or 2, characterized in that, The anti-rotation structure includes multiple sets of circumferentially arranged bosses in the center of the outer shell; the bottom end of the knob is provided with multiple sets of abutment grooves corresponding to the bosses.

5. The automatic door closing device according to claim 4, characterized in that, The top surface of the boss is an inclined surface structure whose height gradually decreases from one end of the boss to the other.

6. The automatic door closing device according to claim 1, characterized in that, The traction assembly includes a fixing frame and a coil spring; the fixing frame is disposed between the outer shell and the base; the coil spring is disposed between the fixing frame and the base, and the coil spring is connected to a pull rope.

7. The automatic door closing device according to claim 6, characterized in that, The adjusting rod has a first fixing groove at one end near the coil spring, and the first end of the coil spring is fixed in the first fixing groove; the fixing frame has a second fixing groove, and the end of the coil spring is fixed in the second fixing groove.

8. The automatic door closing device according to claim 1, characterized in that, The pull cord is provided with a retaining ring away from the outer casing for connection with the door fixing component.

9. The automatic door closing device according to claim 8, characterized in that, A roller is provided between the outer shell and the base to abut against the pull rope, and the roller is rotatably connected to the outer shell and the base respectively.

10. The automatic door closing device according to claim 8 or 9, characterized in that, A wire guide ring is provided between the outer shell and the pull rope.

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