Electromagnetic door closer

Abstract

The utility model particularly relates to the technical field of door closers, and discloses an electromagnetic door closer which comprises a first mounting seat, a rotating shaft rotationally connected to the top end of the first mounting seat, a connecting rod fixedly arranged at the top end of the rotating shaft, a damping rod rotationally connected to the other end of the connecting rod, a guide rail sleeved on the outer surface of the damping rod, and a clamping seat rotationally connected to the other end of the guide rail. Second mounting seats are symmetrically and fixedly arranged on the two side walls of the clamping seat, and infrared sensors are fixedly arranged on the side walls of the second mounting seats. Through the arrangement of the first mounting base, the rotating shaft, the connecting rod, the damping rod, the guide rail, the clamping base, the second mounting base, the infrared sensors, the supporting base, the servo motor and the PLC, the clamping base is U-shaped and can be conveniently arranged at the top end of the door leaf in a sleeving mode, and the two infrared sensors are symmetrically distributed and used for detecting people who need to pass through the door leaf; the PLC is driven to send an electric signal to start the servo motor to drive the rotating shaft to rotate, so that the damping rod and the guide rail are driven to retract to open the door leaf, and the experience of a user passing through the door leaf is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of door closers, and particularly relates to an electromagnetic door closer. Background Art

[0002] The electromagnetic door closer, also known as an automatic door closing release or an electric release, is a mechanism that realizes the automatic closing of a door leaf through an electric control method. The door closer was first applied to normally open fire doors to automatically close the fire doors for fire prevention.

[0003] The existing electromagnetic door closer consists of an electric door closer main body and a guide groove. The main body is installed on the door frame or wall, the guide rail is installed on the door leaf, and the main body and the guide rail are connected by a connecting rod to realize the rotation of the door leaf. When the door leaf is normally closed, when a user needs to open the door leaf to pass through while carrying items, it will affect the convenience of the user to open the door and thus affect the user experience. For this reason, an electromagnetic door closer is provided. Summary of the Utility Model

[0004] The utility model provides an electromagnetic door closer, aiming to solve the problem that when the door leaf is normally closed, when a user needs to open the door leaf to pass through while carrying items, it will affect the convenience of the user to open the door and thus affect the user experience.

[0005] The utility model is realized as follows: an electromagnetic door closer includes a first mounting seat. The top end of the first mounting seat is rotatably connected to a rotating shaft. The top end of the rotating shaft is fixedly provided with a connecting rod. The other end of the connecting rod is rotatably connected to a damping rod. The outer surface of the damping rod is sleeved with a guide rail. The other end of the guide rail is rotatably connected to a clamping seat. On the two side walls of the clamping seat, second mounting seats are symmetrically and fixedly provided. Infrared sensors are fixedly provided on the side walls of the second mounting seats. A notch is opened inside the first mounting seat. A supporting seat is fixedly provided inside the notch. A servo motor is fixedly provided on the surface of the supporting seat. The output end of the servo motor is fixedly provided at the bottom end of the rotating shaft through a coupling. A PLC controller is fixedly provided on the inner side wall of the notch near the lower part of the supporting seat. The PLC controller is coupled with the servo motor and the infrared sensors in sequence.

[0006] Preferably, four mounting ears are symmetrically and fixedly provided on the side wall of the first mounting seat. Threaded holes are opened on the surfaces of the four mounting ears, improving the installation stability of the first mounting seat.

[0007] Preferably, a cover plate is fixedly provided on the side wall of the first mounting seat. Hole grooves are opened at the four corner positions of the first mounting seat near the notch for bolt fixation, improving the installation stability of the cover plate.

[0008] Preferably, an electric control switch is fixedly provided on the side wall of the cover plate. The electric control switch is coupled with the infrared sensors, the PLC controller, and the servo motor in sequence, facilitating the closing and opening of the control circuit.

[0009] Preferably, a heat dissipation hole is provided on the side wall of the cover plate near the upper side of the electric control switch, and the heat dissipation hole penetrates the cover plate in a grid shape to facilitate air circulation.

[0010] Preferably, a screw is threadedly connected to the side wall of the holder close to the upper side of the second mounting seat, and the screw passes through the two side walls of the holder in sequence, thereby improving the stability of the holder installation.

[0011] Preferably, a slider is fixedly provided at the end of the damping rod close to the guide rail, and a slide groove is provided inside the guide rail for the slider to slide, and the internal dimensions of the slide groove are adapted to the external dimensions of the slider and the damping rod, thereby improving the sliding stability of the damping rod.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] Firstly, a mounting base 1, a rotating shaft, a connecting rod, a damping rod, a guide rail, a bracket, a mounting base 2, an infrared sensor, a supporting base, a servo motor and a PLC controller are provided. The bracket is U-shaped and can be conveniently mounted on the top of the door leaf. Two infrared sensors are symmetrically distributed to detect people who need to pass through the door leaf, driving the PLC controller to send an electrical signal to start the servo motor to drive the rotating shaft to rotate, thereby driving the damping rod and the guide rail to retract and open the door leaf, thereby improving the user's experience of passing through the door leaf; secondly, a slider and a slide groove are provided, the slider is fixedly connected to the damping rod to form an integrated structure, and the slider is slidably connected to the inside of the slide groove, which can improve the stability of the door leaf rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of an installation structure of a mounting seat of the utility model.

[0016] Figure 3 It is a schematic diagram of the side planar structure of the card holder of the utility model.

[0017] Figure 4 It is a schematic diagram of the cross-sectional installation structure of the guide rail of the utility model.

[0018] The accompanying drawings are marked as follows: 1. Mounting seat 1; 2. Rotating shaft; 3. Connecting rod; 4. Damping rod; 5. Guide rail; 6. Clamping seat; 7. Mounting seat 2; 8. Infrared sensor; 9. Cover plate; 10. Electric switch; 11. Heat dissipation hole; 12. Slot 1; 13. Support seat; 14. Servo motor; 15. PLC controller; 16. Mounting ear; 17. Hole groove; 18. Screw; 19. Slider; 20. Slide groove. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0020] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Please refer to Figures 1-4, the embodiments provided by the present utility model: an electromagnetic door closer, including a mounting base 1, four mounting ears 16 are symmetrically and fixedly arranged on the side wall of the mounting base 1, and threaded holes are opened on the surfaces of the four mounting ears 16, which improves the mounting stability of the mounting base 1. The top end of the mounting base 1 is rotatably connected with a rotating shaft 2, the top end of the rotating shaft 2 is fixedly provided with a connecting rod 3, the other end of the connecting rod 3 is rotatably connected with a damping rod 4, a guide rail 5 is sleeved on the outer surface of the damping rod 4, and the damping rod 4 is slidably connected inside the guide rail 5 to compensate for the distance that the connecting rod 3 and the damping rod 4 drive the door leaf to rotate. The other end of the guide rail 5 is rotatably connected with a clamping seat 6, and the clamping seat 6 is U-shaped and sleeved on the top end of the door leaf. Four mounting ears 16 are symmetrically and fixedly arranged on the side wall of the mounting base 1, and threaded holes are opened on the surfaces of the four mounting ears 16, which improves the mounting stability of the mounting base 1. On the two side walls of the clamping seat 6, mounting bases 7 are symmetrically and fixedly arranged, and a screw rod 18 is threadedly connected to the side wall of the clamping seat 6 above the mounting base 7. The screw rod 18 sequentially penetrates through the two side walls of the clamping seat 6, which improves the mounting stability of the clamping seat 6. Infrared sensors 8 are fixedly arranged on the side walls of the mounting bases 7 through bolts. The model of the infrared sensor 8 is BRW600-405. The mounting bases 7 are all in the shape of a triangular pyramid to change the radiation angle of the infrared sensor 8. A notch 12 is opened inside the mounting base 1, a support seat 13 is fixedly arranged inside the notch 12, a servo motor 14 is fixedly arranged on the surface of the support seat 13, and the output end of the servo motor 14 is fixedly arranged at the bottom end of the rotating shaft 2 through a coupling. On the inner side wall of the notch 12 below the support seat 13, a PLC controller 15 is fixedly arranged. The model of the PLC controller 15 is FX3U-485-BD. The PLC controller 15 is coupled with the servo motor 14 and the infrared sensor 8 in sequence. When the infrared sensor 8 detects a person, it sends an electrical signal to the PLC controller 15, thereby driving the servo motor 14 to drive the rotating shaft 2 to rotate counterclockwise, so that the connecting rod 3 and the guide rail 5 contract, thereby driving the door leaf to rotate and open, so as to facilitate the passage of people on both sides of the door leaf, thereby improving the user's passing experience. When the person leaves the detection range of the infrared sensor 8, the infrared sensor 8 sends another electrical signal to drive the servo motor 14 to rotate clockwise, so as to expand the connecting rod 3 and the guide rail 5, thereby pushing the door leaf to close.

[0022] A cover plate 9 is fixedly arranged on the side wall of the mounting base 1 to close the notch 12. Hole grooves 17 are opened at the four corner positions of the mounting base 1 close to the notch 12 for bolt fixation, which improves the mounting stability of the cover plate 9. An electric control switch 10 is fixedly arranged on the side wall of the cover plate 9. The electric control switch 10 is coupled with the infrared sensor 8, the PLC controller 15 and the servo motor 14 in sequence to facilitate the closing and opening of the control circuit. A heat dissipation hole 11 is opened on the side wall of the cover plate 9 above the electric control switch 10. The heat dissipation hole 11 penetrates through the cover plate 9 in a grid shape to facilitate air circulation, thereby reducing the temperature inside the notch 12.

[0023] A slider 19 is fixedly provided at the end of the damping rod 4 close to the guide rail 5. A chute 20 is opened inside the guide rail 5 for the slider 19 to slide. The internal dimension of the chute 20 is adapted to the external dimensions of the slider 19 and the damping rod 4, improving the sliding stability of the damping rod 4. The damping rod 4 supplements the distance between the connecting rod 3 and the damping rod 4 when the door leaf rotates by telescoping inside the chute 20, thereby improving the rotational stability of the door leaf.

[0024] Working principle: When this electromagnetic door closer is in use, the operator first connects an external power supply and turns on the electric control switch 10 to close the circuit, thereby realizing power supply. The clamping seat 6 is sleeved on the top end of the door leaf, and the screw rod 18 is sequentially threadedly connected to the side wall of the door leaf of the clamping seat 6, thereby improving the installation stability of the clamping seat 6. The two infrared sensors 8 are symmetrically distributed, facilitating the detection of the people waiting to pass on both sides of the door leaf. When the infrared sensor 8 detects a person, it sends an electrical signal to the PLC controller 15, thereby driving the servo motor 14 to drive the rotating shaft 2 to rotate counterclockwise, so that the connecting rod 3 and the guide rail 5 contract, thereby driving the door leaf to rotate and open, facilitating the people on both sides of the door leaf to pass through, and thus improving the user's passing experience. When the person leaves the detection range of the infrared sensor 8, the infrared sensor 8 sends another electrical signal to drive the servo motor 14 to rotate clockwise, thereby expanding the connecting rod 3 and the guide rail 5, and thus pushing the door leaf to close.

[0025] Secondly, the internal dimension of the chute 20 is adapted to the external dimensions of the slider 19 and the damping rod 4, improving the sliding stability of the damping rod 4 inside the chute 20. The damping rod 4 compensates for the length of the connecting rod 3 and the damping rod 4 to drive the rotation of the door leaf by telescoping inside the chute 20, thereby improving the rotational stability of the door leaf.

[0026] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0027] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above-mentioned unit division can be implemented in other ways in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the shown or discussed coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0028] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or may be distributed across multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. An electromagnetic door closer, characterized in that, Including a first mounting base (1): A rotating shaft (2) is rotatably connected to the top end of the first mounting base (1). A connecting rod (3) is fixedly provided at the top end of the rotating shaft (2). The other end of the connecting rod (3) is rotatably connected to a damping rod (4). A guide rail (5) is sleeved on the outer surface of the damping rod (4). The other end of the guide rail (5) is rotatably connected to a clamping seat (6). Two symmetrically arranged second mounting bases (7) are fixedly provided on the two side walls of the clamping seat (6). Infrared sensors (8) are fixedly provided on the side walls of the second mounting bases (7). A first notch (12) is formed inside the first mounting base (1). A support seat (13) is fixedly provided inside the first notch (12). A servo motor (14) is fixedly provided on the surface of the support seat (13). The output end of the servo motor (14) is fixedly provided at the bottom end of the rotating shaft (2) through a coupling. A PLC controller (15) is fixedly provided on the inner side wall of the first notch (12) below the support seat (13). The PLC controller (15) is coupled to the servo motor (14) and the infrared sensors (8) in sequence.

2. The electromagnetic door closer according to claim 1, characterized in that: Four mounting ears (16) are symmetrically and fixedly provided on the side wall of the first mounting base (1). Threaded holes are formed on the surfaces of the four mounting ears (16).

3. The electromagnetic door closer according to claim 2, wherein: A cover plate (9) is fixedly provided on the side wall of the first mounting base (1). Hole slots (17) are formed at the four corner positions of the first mounting base (1) near the first notch (12) for bolt fixation.

4. The electromagnetic door closer according to claim 3, characterized in that: An electric control switch (10) is fixedly provided on the side wall of the cover plate (9). The electric control switch (10) is coupled to the infrared sensors (8), the PLC controller (15), and the servo motor (14) in sequence.

5. An electromagnetic door closer according to claim 4, characterized in that: Heat dissipation holes (11) are formed on the side wall of the cover plate (9) above the electric control switch (10). The heat dissipation holes (11) penetrate through the cover plate (9) in a grid shape.

6. The electromagnetic door closer according to claim 1, characterized in that: A screw rod (18) is threadedly connected to the side wall of the clamping seat (6) above the second mounting base (7). The screw rod (18) penetrates through the two side walls of the clamping seat (6) in sequence.

7. An electromagnetic door closer according to claim 1, characterized in that: A slider (19) is fixedly provided at the end of the damping rod (4) near the guide rail (5). A sliding groove (20) is formed inside the guide rail (5) for the slider (19) to slide. The internal dimension of the sliding groove (20) is adapted to the external dimensions of the slider (19) and the damping rod (4).

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