Door closer

Abstract

The utility model relates to the technical field of door body accessories, and discloses a door closer which comprises an installation plate, an installation hole is formed in the front face of the installation plate, a concealable door closing mechanism is arranged on the front face of the installation plate, the concealable door closing mechanism comprises a fixing cylinder, the fixing cylinder is fixedly installed on the front face of the installation plate, and the fixing cylinder is fixedly installed on the front face of the installation plate. And a rotating cylinder is rotationally connected to the inner wall of the fixed cylinder. Through the design of the positioning bolt, the positioning bolt is loosened, the fixed state of the rotating cylinder on the inner wall of the fixed cylinder can be relieved, then the rotating cylinder can be rotated on the inner wall of the fixed cylinder, and the door closing function of the structure can be hidden by rotating the door closing supporting rod to the direction in which the door closing supporting rod is overlapped with the mounting plate; the problem that frequent passing of an operator is affected due to frequent closing of the door body is avoided, the working efficiency of the operator is improved, meanwhile, through the design of a magnetic attraction block, magnetic attraction positioning treatment can be conducted on the door closing supporting rod, and the convenience of the hidden door closing function of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door body accessories, in particular to a door closer. Background Art

[0002] The door closer is a spring-like device on the door head. When the door is opened, it can be compressed and then released to automatically close the door. It acts like a spring door and can ensure that the door is closed to its initial position accurately and promptly after being opened.

[0003] A Chinese patent discloses a door closer with a publication number of CN210152477U. The technical solution disclosed in the patent document is as follows: it includes a rotating wheel, an upper torsion spring, a lower torsion spring, an upper base, a lower base, a connecting rod and a pressure wheel; the rotating wheel is mounted on the shaft, and the rotating wheel is provided with a plurality of dial adjustment holes arranged in a circle; the upper and lower ends of the shaft are fixedly connected to the upper base and the lower base respectively, one end of the upper torsion spring is connected to the rotating wheel, the other end of the upper torsion spring is connected to the upper base, one end of the lower torsion spring is connected to the rotating wheel, and the other end of the lower torsion spring is connected to the lower base.

[0004] In order to solve the problem of uneven force on a single spring, the prior art adopts a method of designing a structure combining an upper torsion spring and a lower torsion spring. However, the door closer cannot be conveniently hidden. The door closing function of this structure cannot be released after the installation is completed. If the user needs to frequently move goods through the door body, this structure will cause the door body to close frequently, which will in turn affect the user's work efficiency. Utility Model Content

[0005] The utility model aims to provide a door closer to solve the problem in the prior art that the door closer causes the door to be frequently closed, which affects the work efficiency of the user.

[0006] The utility model provides the following technical solutions: a door closer comprises a mounting plate, a mounting hole is provided on the front side of the mounting plate, a concealable door closing mechanism is arranged on the front side of the mounting plate, the concealable door closing mechanism comprises a fixing cylinder, the fixing cylinder is fixedly mounted on the front side of the mounting plate, a rotating cylinder is rotatably connected to the inner wall of the fixing cylinder, a positioning bolt is threadedly connected to the top of the fixing cylinder, the threaded end of the positioning bolt is movably connected to the outer wall of the rotating cylinder, a rotating rod is rotatably connected to the inner wall of the rotating cylinder, a door closing support rod is fixedly sleeved on the outer wall of the rotating rod, a limiting protrusion is fixedly mounted on the front side of the mounting plate, a magnetic suction block is fixedly mounted on the end of the limiting protrusion, and the outer wall of the door closing support rod is magnetically connected to the right side of the magnetic suction block.

[0007] Preferably, as the above technical solution, an extension plate is fixedly installed on the outer wall of the rotating cylinder, a welding block is fixedly installed on the front surface of the extension plate, and a track rod is fixedly installed on the outer wall of the inner side of the welding block.

[0008] Preferably, as the above technical solution, a sliding connecting frame is slidably connected to the outer wall of the track rod, and a rack is fixedly installed on the front surface of the sliding connecting frame.

[0009] Preferably, as the above technical solution, the end of the rotating rod extends to the outside of the rotating cylinder and is fixedly connected to a gear, and the back surface of the gear meshes with the front surface of the rack.

[0010] Preferably, as the above technical solution, second elastic members are fixedly installed on both sides of the sliding connecting frame, and one end of the second elastic member away from the sliding connecting frame is fixedly connected to the outer wall of the inner side of the welding block.

[0011] Preferably, as the above technical solution, a limiting sleeve is fixedly installed on the outer wall of the door closing support rod, a sliding frame member is slidably connected to the inner wall of the limiting sleeve, and a rubber wheel is rotatably connected to the outer wall of the inner side of the sliding frame member.

[0012] Preferably, as the above technical solution, a first elastic member is fixedly installed on the inner wall of the sliding frame member, and one end of the first elastic member away from the inner wall of the sliding frame member is fixedly connected to the outer wall of the door closing support rod.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] Through the design of the positioning bolt, by loosening it, the fixed state of the rotating cylinder on the inner wall of the fixed cylinder can be released. Subsequently, the rotating cylinder can be rotated on the inner wall of the fixed cylinder, and the door closing support rod can be rotated to the direction overlapping with the mounting plate, thus hiding the door closing function of this structure and avoiding the problem that the frequent closing of the door body will affect the frequent passage of the operator, improving the working efficiency of the operator. At the same time, through the design of the magnetic attraction block, the magnetic attraction positioning treatment can be carried out on the door closing support rod, enhancing the convenience of hiding the door closing function of this structure. Description of the Drawings

[0015] Figure 1 is a three-dimensional view of the present utility model;

[0016] Figure 2 is a schematic structural view of the present utility model when the door closing support rod is in the door closing state;

[0017] Figure 3 is Figure 2 the enlarged structural view at A in

[0018] Figure 4 is a schematic structural view of the end of the door closing support rod of the present utility model.

[0019] In the figure: 1. mounting plate; 11. mounting hole; 12. limiting lug; 13. magnetic attraction block; 2. retractable door closing mechanism; 21. fixed cylinder; 22. rotating cylinder; 23. positioning bolt; 24. rotating rod; 25. door closing support rod; 251. limiting sleeve; 252. sliding frame member; 253. rubber wheel; 254. first elastic member; 26. extension plate; 261. welding block; 262. track rod; 263. sliding connecting frame; 264. rack; 265. gear; 266. second elastic member. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] As Figures 1-4 shown, the present invention provides a technical solution: a door closer, including a mounting plate 1, a mounting hole 11 is opened on the front surface of the mounting plate 1, and a retractable door closing mechanism 2 is arranged on the front surface of the mounting plate 1. The retractable door closing mechanism 2 includes a fixed cylinder 21, the fixed cylinder 21 is fixedly installed on the front surface of the mounting plate 1, a rotating cylinder 22 is rotatably connected to the inner wall of the fixed cylinder 21, a positioning bolt 23 is threadedly connected to the top of the fixed cylinder 21, and the threaded end of the positioning bolt 23 is movably connected to the outer wall of the rotating cylinder 22. A rotating rod 24 is rotatably connected to the inner wall of the rotating cylinder 22, a door closing support rod 25 is fixedly sleeved on the outer wall of the rotating rod 24, a limiting lug 12 is fixedly installed on the front surface of the mounting plate 1, and a magnetic attraction block 13 is fixedly installed at the end of the limiting lug 12. The outer wall of the door closing support rod 25 is magnetically attracted and connected to the right side of the magnetic attraction block 13. By rotating and loosening the positioning bolt 23, the fixed state of the rotating cylinder 22 on the inner wall of the fixed cylinder 21 can be released. Then, the rotating cylinder 22 can be rotated on the inner wall of the fixed cylinder 21, and the door closing support rod 25 can be rotated to the direction overlapping with the mounting plate 1, so as to hide the door closing function of this structure, avoid the problem that the frequent closing of the door body will affect the frequent passage of the operator, and improve the work efficiency of the operator. Through the design of the magnetic attraction block 13, the magnetic attraction positioning of the door closing support rod 25 can be carried out, avoiding the problem that the operator still needs to tighten the positioning bolt 23 to vertically position the door closing support rod 25, and improving the convenience of the hidden door closing function.

[0022] As an implementation mode in this embodiment, as Figure 2 、 Figure 3As shown in the figure, an extension plate 26 is fixedly installed on the outer wall of the rotating cylinder 22. A welding block 261 is fixedly installed on the front surface of the extension plate 26. A track rod 262 is fixedly installed on the outer wall inside the welding block 261. A sliding connecting frame 263 is slidably connected to the outer wall of the track rod 262. A rack 264 is fixedly installed on the front surface of the sliding connecting frame 263. The end of the rotating rod 24 extends to the outside of the rotating cylinder 22 and is fixedly connected to a gear 265. The back surface of the gear 265 meshes with the front surface of the rack 264. Two second elastic members 266 are fixedly installed on both sides of the sliding connecting frame 263. The ends of the second elastic members 266 away from the sliding connecting frame 263 are fixedly connected to the outer wall inside the welding block 261. When manually opening the door body, the door body will push the closing door support rod 25 when it moves. The closing door support rod 25 will cause the rotating rod 24 to rotate on the inner wall of the rotating cylinder 22, synchronously driving the gear 265 to rotate. Through the design of the meshing of the gear 265 and the rack 264, the sliding connecting frame 263 can be driven to slide on the outer wall of the track rod 262, compressing one of the second elastic members 266 and stretching the other second elastic member 266. After the operator's hand is withdrawn from the door body, the second elastic member 266 drives the sliding connecting frame 263 to slide back through the reset elastic force, and at the same time drives the rotating rod 24 to rotate in the reverse direction through the transmission of the rack 264 and the gear 265, so that the closing door support rod 25 pushes the door body to perform the reset work.

[0023] As an implementation method in this embodiment, as Figure 2 , Figure 4 shown, a limit sleeve 251 is fixedly installed on the outer wall of the closing door support rod 25. A sliding frame member 252 is slidably connected to the inner wall of the limit sleeve 251. A rubber wheel 253 is rotatably connected to the outer wall inside the sliding frame member 252. A first elastic member 254 is fixedly installed on the inner wall of the sliding frame member 252. The end of the first elastic member 254 away from the inner wall of the sliding frame member 252 is fixedly connected to the outer wall of the closing door support rod 25. After the door body touches the rubber wheel 253, the sliding frame member 252 will slide on the inner wall of the limit sleeve 251, and at the same time stretch the first elastic member 254. Through the elastic deformation generated by the first elastic member 254, the function of buffering and protecting the door body is realized. Through the material setting of the rubber wheel 253 and the relationship between the rubber wheel 253 and the sliding frame member 252 being rotatably connected, the door body can be further protected.

[0024] Working principle: Install the mounting plate 1 on the door frame by external screws, and make the door closing support rod 25 located on the opening path of the door body. Manually open the door body. When the door body moves, it will push the door closing support rod 25. The door closing support rod 25 will cause the rotating rod 24 to rotate on the inner wall of the rotating cylinder 22, synchronously driving the gear 265 to rotate. Through the design of the gear 265 meshing with the rack 264, it drives the sliding connecting frame 263 to slide on the outer wall of the track rod 262, compressing one of the second elastic members 266 and stretching the other second elastic member 266. After the operator's hand is withdrawn from the door body, through the restoring elastic force of the second elastic member 266, it drives the sliding connecting frame 263 to slide back to its original position. At the same time, through the transmission of the rack 264 and the gear 265, it drives the rotating rod 24 to rotate in the reverse direction, causing the door closing support rod 25 to push the door body to close. If there is no need to perform the door closing operation, rotate and loosen the positioning bolt 23, and then the rotating cylinder 22 can be rotated on the inner wall of the fixed cylinder 21, and the door closing support rod 25 can be rotated to the direction overlapping with the mounting plate 1, so as to hide the door closing function of this structure.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A door closer, comprising a mounting plate (1), characterized in that: The front of the mounting plate (1) is provided with a mounting hole (11), and the front of the mounting plate (1) is provided with a concealable door closing mechanism (2), and the concealable door closing mechanism (2) comprises a fixing cylinder (21), and the fixing cylinder (21) is fixedly mounted on the front of the mounting plate (1); a rotating cylinder (22) is rotatably connected to the inner wall of the fixing cylinder (21); a positioning bolt (23) is threadedly connected to the top of the fixing cylinder (21); the threaded end of the positioning bolt (23) is movably connected to the outer wall of the rotating cylinder (22); a rotating rod (24) is rotatably connected to the inner wall of the rotating cylinder (22); a door closing support rod (25) is fixedly sleeved on the outer wall of the rotating rod (24); a limiting protrusion (12) is fixedly mounted on the front of the mounting plate (1); a magnetic attraction block (13) is fixedly mounted on the end of the limiting protrusion (12); and the outer wall of the door closing support rod (25) is magnetically connected to the right side of the magnetic attraction block (13).

2. A door closer according to claim 1, characterized in that: An expansion plate (26) is fixedly mounted on the outer wall of the rotating cylinder (22), a welding block (261) is fixedly mounted on the front of the expansion plate (26), and a track rod (262) is fixedly mounted on the outer wall inside the welding block (261).

3. A door closer according to claim 2, characterized in that: A sliding connection frame (263) is slidably connected to the outer wall of the track rod (262), and a rack (264) is fixedly installed on the front side of the sliding connection frame (263).

4. A door closer according to claim 3, characterized in that: The end of the rotating rod (24) extends to the outside of the rotating cylinder (22) and is fixedly connected to a gear (265), and the back surface of the gear (265) is meshed with the front surface of the rack (264).

5. A door closer according to claim 4, characterized in that: A second elastic member (266) is fixedly mounted on both sides of the sliding connection frame (263), and one end of the second elastic member (266) away from the sliding connection frame (263) is fixedly connected to the outer wall on the inner side of the welding block (261).

6. A door closer according to claim 1, characterized in that: A limiting sleeve (251) is fixedly mounted on the outer wall of the door closing support rod (25), a sliding frame (252) is slidably connected to the inner wall of the limiting sleeve (251), and a rubber wheel (253) is rotatably connected to the outer wall inside the sliding frame (252).

7. A door closer according to claim 6, characterized in that: A first elastic member (254) is fixedly mounted on the inner wall of the sliding frame (252), and one end of the first elastic member (254) away from the inner wall of the sliding frame (252) is fixedly connected to the outer wall of the door closing support rod (25).

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