Slide groove structure of electric door closer and door closer

Abstract

The present invention relates to a slideway structure for an electric door closer, wherein a limit unit and a door closing feedback unit are both electrically connected to a main control PCBA; a C-shaped guide rail is provided below the slideway plate, and a slider is slidably arranged on the C-shaped guide rail along the C-shaped guide rail; a left screw fixing boss and a right screw fixing boss are provided at one end of the slideway plate, and a left screw movable groove and a right screw movable groove are provided on the slideway plate; two ends of the limit unit are connected to the left screw fixing boss and the right screw fixing boss by fixing screws, respectively, and the fixing screws are respectively located in the left screw movable groove and the right screw movable groove; the other end of the slideway plate is detachably connected to the door closing feedback unit, and the slideway plate is further provided with a first air-avoidance groove and a second air-avoidance groove, the first air-avoidance groove being located between the left screw movable groove and the right screw movable groove, and the second air-avoidance groove being located below the door closing feedback unit; and a housing is detachably connected to the slideway plate. The present invention has the advantages of simple and convenient assembly and installation and high reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of door closers, and more particularly to a sliding groove structure of an electric door closer and the door closer. Background Art

[0002] Modern buildings require fire doors in accordance with fire protection regulations. These doors are typically equipped with electric door closers, controlled by a linkage controller that automatically closes the door in the event of a fire. Currently, there are two main approaches to electric door closers for fire doors. One employs a parallel slide mounted on the door frame, with a connecting rod connecting the slide to a hydraulic unit mounted on the door. The position of the connecting rod on the slide controls the door opening. The other employs a hydraulic unit mounted on the door frame, with the door closing function achieved through a swing arm and a guide rail mounted on the door.

[0003] The first approach helps ensure the door closer's reliability, as the limiter is subject to less force. However, it presents difficulties in assembly and installation. Because the slideway typically utilizes an aluminum profile, secured to the door frame with plugs at both ends, the internal main control PCBA, limiter, door closing feedback unit, and the electrical signal cables connecting them all need to be inserted from one end of the aluminum profile, making installation very inconvenient. The second approach also places greater force on the limiter, compromising the reliability of the door closer.

[0004] Therefore, it is necessary to provide a door closer that is simple and convenient to assemble and install and has high reliability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a sliding groove structure of an electric door closer and a door closer that are simple and convenient to assemble and install and have high reliability in view of the above-mentioned defects of the prior art.

[0006] On the one hand, according to an embodiment of the present invention, the present invention provides a slide structure of an electric door closer, comprising a main control PCBA, a limit unit, and a door closing feedback unit, wherein the limit unit and the door closing feedback unit are both electrically connected to the main control PCBA, and further comprising a slide plate, a housing, and a slider;

[0007] A C-shaped guide rail is provided below the slide plate, and the slider can be slidably provided on the C-shaped guide rail;

[0008] One end of the slide plate is provided with a left screw fixing boss and a right screw fixing boss, and the slide plate is provided with a left screw movable groove and a right screw movable groove, and the two ends of the limiting unit are respectively connected to the left screw fixing boss and the right screw fixing boss by fixing screws, and the fixing screws are respectively located in the left screw movable groove and the right screw movable groove;

[0009] The other end of the slide plate is detachably connected to the door closing feedback unit, and the slide plate is further provided with a first avoidance groove and a second avoidance groove, the first avoidance groove is located between the left screw movable groove and the right screw movable groove, and the second avoidance groove is located below the door closing feedback unit;

[0010] The housing is detachably connected to the slide plate, and the housing and the slide plate form a cavity that contains the door closing feedback unit, the limiting unit, and the main control PCBA.

[0011] The beneficial effects of the present invention are:

[0012] By detachably placing the main control PCBA, limit unit, and door closing feedback unit on the slide plate and then covering them with a housing, installation is very convenient. This avoids the installation trouble caused by the existing aluminum profile housing requiring the main control PCBA, limit unit, and door closing feedback unit to be inserted from both ends.

[0013] By setting the left screw movable groove and the right screw movable groove, the screws can be locked and positioned at different positions of the movable groove, which is conducive to the positioning of the slider at different positions of the slide groove to open the door and set the door opening state at different angles; the second avoidance groove is convenient for adjusting the position of the door closing feedback unit to adjust to the appropriate door closing state;

[0014] By arranging the slide plate and the slider, the force applied to the limit unit during operation is small and the reliability is high.

[0015] In short, the adoption of the above-mentioned brand-new and cleverly designed slide structure and the cooperation of various technical features make the slide structure have the advantages of simple and convenient assembly and installation, high reliability, and easy maintenance.

[0016] Preferably, fixing plates are respectively provided at both ends of the slide plate, mounting holes are provided on the fixing plates, and second mounting holes are respectively provided at both ends of the shell. When the shell is mounted on the slide plate, the mounting hole and the second mounting hole are concentric.

[0017] Preferably, the door closing feedback unit is connected to the second air avoidance groove by screws.

[0018] Generally, the main control PCBA is detachably disposed in the housing.

[0019] Generally, the main control PCBA is detachably mounted on the limiting unit.

[0020] On the other hand, according to an embodiment of the present invention, the present invention also proposes a door closer, comprising the slide groove structure, a connecting rod and a hydraulic body, one end of the connecting rod is hinged to the slider of the slide groove structure, and the other end of the connecting rod is hinged to the hydraulic body.

[0021] Generally, a mounting hole is provided on the hydraulic body, and the hydraulic body is mounted on the door leaf through the mounting hole, and the slide groove structure is mounted on the door frame or the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0023] Figure 1 1 is a schematic structural diagram of a door closer according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the chute structure of a preferred embodiment of the present invention;

[0025] Figure 3 Schematic diagram of a chute plate according to a preferred embodiment of the present invention;

[0026] Figure 4 is a schematic cross-sectional view of a chute plate according to a preferred embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the exploded structure of a chute structure in another preferred embodiment of the present invention;

[0028] Figure 6 Schematic diagram of a chute plate according to another preferred embodiment of the present invention.

[0029] In the above drawings: 1. Hydraulic body; 2. Connecting rod; 3. Slide groove structure; 31. Shell; 32. Slide groove plate; 33. Door closing feedback unit; 34. Limiting unit; 35. Main control PCBA; 36. Slider; 311. Second mounting hole; 321. Slide groove bottom plate; 322. C-type guide rail; 323. Second air avoidance groove; 324. Left screw fixing boss; 325. Left screw movable groove; 326. First air avoidance groove; 327. Right screw movable groove; 328. Right screw fixing boss; 329. Fixing plate; 3291. First mounting hole. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0031] Example 1, as Figure 1 As shown, a door closer comprises a chute structure 3, a connecting rod 2, and a hydraulic body 1. One end of the connecting rod 2 is hinged to the slider of the chute structure 3, and the other end of the connecting rod 2 is hinged to the hydraulic body 1. The hydraulic body 1 is provided with a mounting hole, through which the hydraulic body 1 is mounted to the door leaf, and the chute structure 3 is mounted to the door frame or wall. The hydraulic body 1 is related to the existing technology and will not be further explained in this application. The following description focuses on the chute structure 3.

[0032] like Figure 2 The figure shows a chute structure for an electric door closer. The chute structure 3 includes a main control PCBA 35, a limit unit 34, and a door closing feedback unit 33. The limit unit 34 and the door closing feedback unit 33 are both electrically connected to the main control PCBA 35. The limit unit 34 and the door closing feedback unit 33 respectively determine the open and close position of the door via a slider 36. The main control PCBA 35, the limit unit 34, and the door closing feedback unit 33 are all conventional technologies and will not be further elaborated in this application. This application focuses on the installation and fixing structure of the chute structure 3.

[0033] like Figure 2 The slide plate 32 and housing 31 are fastened together. The slide plate 32 is made of bent metal sheet. The housing 31 is a long, downward-facing plastic shell. The length and width of its internal chamber are aligned with the length and width of the slide plate 32. Inside, screws (not shown) are provided to secure the main control PCBA 35, as well as screws or clips (not shown) to secure the slide plate 32. The door closing feedback unit 33 and the limiter unit 34 are removably secured to the slide plate 32, while the main control PCBA 35 is removably secured within the housing 31.

[0034] It can be seen that the structure is simple to assemble. The limit unit 34 and the door closing feedback unit 33 are respectively locked on the slide plate 32. After the wires are connected, the upper shell 31 is fixed. There is no need to use the previous installation method of inserting it from the end of the profile. Moreover, the cost is low. The slide main body is composed of a bent metal plate + a plastic shell. Compared with the existing technology, it is made of aluminum alloy by stretching and mechanically processing the fixing holes, etc., which ensures the strength of the shell while lowering the material cost. It is also convenient to maintain. When the internal components fail, it is convenient to disassemble and repair.

[0035] like Figure 3 ,refer to Figure 2 A C-shaped guide rail 322 is provided below the chute plate 32. The C-shaped guide rail 322 is integrally formed with the chute plate 32 and is formed by bending a metal plate. The cross-sectional structure of the chute plate 32 is as follows: Figure 4As shown. The slider 36 can be slidably arranged on the C-shaped guide rail 322 along the C-shaped guide rail 322. A left screw fixing boss 324 and a right screw fixing boss 328 are provided at one end of the slide plate 32. A left screw movable groove 325 and a right screw movable groove 327 are provided on the slide plate 32. The two ends of the limit unit 34 are respectively connected to the left screw fixing boss 324 and the right screw fixing boss 328 by fixing screws. The left screw fixing boss 324 and the right screw fixing boss 328 protrude upward. The height of the fixing screw head is less than the depth of the boss and will not interfere with the movable space of the slider. The fixing screws are respectively located in the left screw movable groove 325 and the right screw movable groove 327. The fixing screws can be locked and positioned at different positions of the movable groove, which is conducive to positioning the slider at different positions of the slide to open the door and set the door opening state at different angles. Fixed plates 329 are provided at both ends of the slide bottom plate 321, and a first mounting hole 3291 is provided on the fixing plate 329. The first mounting hole 3291 is coaxial with the second mounting hole 311 provided on the shell 31. The screws can simultaneously lock and fix the shell 31 and the slide plate 32 to the door frame to ensure reliable fixation.

[0036] It can be seen that the force on the limit unit is small during operation, and the structural reliability is high. At the same time, the fixing screw can be locked and positioned at different positions in the movable slot, which is conducive to positioning the slider at different positions of the slide slot to open the door and set different opening angles.

[0037] like Figure 3 The slide base plate 321 is also provided with a first clearance groove 326 and a second clearance groove 323. The first clearance groove 326 is located between the left screw movable groove 325 and the right screw movable groove 327, and the second clearance groove 323 is located below the door closing feedback unit 33. The second clearance groove 323 facilitates adjustment of the door closing feedback unit 33 to achieve the desired door closing state. The limit block and switch of the limit unit 34, as well as the switch of the door closing feedback unit 33, extend into the C-shaped guide rail through the first and second clearance grooves 326 and 323, respectively, and cooperate with the movable slider 36 to achieve position limiting and signal feedback.

[0038] Example 2: This example differs from Example 1 in that: Figure 5 The main control PCBA 35 is installed on the limit unit 34, and the wiring seat is fixed on the housing 31. The connection line can also be directly left to the outside of the housing 31 for wiring. In this way, the structure is more compact and disassembly and maintenance are very convenient.

[0039] Example 3: This example differs from Example 1 in that: Figure 6 The fixing plate 329 is an inverted half-I-shaped structure. The first mounting hole 3291 is coaxial with the second mounting hole 311 set on the shell 31. The screws can simultaneously lock and fix the shell 31 and the slide plate 32 on the door frame. This structure has the advantage of a firm connection.

[0040] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A sliding groove structure of an electric door closer, comprising a main control PCBA (35), a limit unit (34) and a door closing feedback unit (33), wherein the limit unit (34) and the door closing feedback unit (33) are both electrically connected to the main control PCBA (35), characterized in that: It also includes a slide plate (32), a housing (31) and a slider (36); A C-shaped guide rail (322) is provided below the slide plate (32), and the slider (36) can be slidably provided on the C-shaped guide rail (322) along the C-shaped guide rail (322); One end of the slide plate (32) is provided with a left screw fixing boss (324) and a right screw fixing boss (328), and the slide plate (32) is provided with a left screw movable groove (325) and a right screw movable groove (327), and the two ends of the limiting unit (34) are respectively connected to the left screw fixing boss (324) and the right screw fixing boss (328) by fixing screws, and the fixing screws are respectively located in the left screw movable groove (325) and the right screw movable groove (327), and the screw head height of the fixing screw is less than the boss depth; The other end of the slide plate (32) is detachably connected to the door closing feedback unit (33), and the slide plate (32) is further provided with a first avoidance groove (326) and a second avoidance groove (323), wherein the first avoidance groove (326) is located between the left screw movable groove (325) and the right screw movable groove (327), and the second avoidance groove (323) is located below the door closing feedback unit (33); The slide plate (32) is formed by bending a metal plate, and the shell (31) is a long plastic shell with an opening facing downward; the shell (31) is detachably connected to the slide plate (32), and the shell (31) and the slide plate (32) form a cavity that contains the door closing feedback unit (33), the limit unit (34) and the main control PCBA (35).

2. The slide groove structure of the electric door closer according to claim 1, characterized in that: The two ends of the chute plate (32) are respectively provided with fixing plates (329), and the fixing plates (329) are provided with first mounting holes (3291). The two ends of the shell (31) are respectively provided with second mounting holes (311). When the shell (31) is installed on the chute plate (32), the first mounting hole (3291) and the second mounting hole (311) are concentric.

3. The slide groove structure of the electric door closer according to claim 1, characterized in that: The door closing feedback unit (33) is connected to the second air-avoiding groove (323) via screws.

4. The sliding groove structure of the electric door closer according to claim 1, characterized in that: The main control PCBA (35) is detachably arranged in the housing (31).

5. The sliding groove structure of the electric door closer according to claim 1, characterized in that: The main control PCBA (35) is detachably arranged on the limiting unit (34).

6. A door closer, comprising the slide groove structure (3) according to claim 1, a connecting rod (2) and a hydraulic body (1), one end of the connecting rod (2) being hinged to the slider of the slide groove structure (3), and the other end of the connecting rod (2) being hinged to the hydraulic body (1).

7. The door closer according to claim 6, characterized in that: The hydraulic main body (1) is provided with a mounting hole, the hydraulic main body (1) is mounted on the door leaf through the mounting hole, and the slide groove structure (3) is mounted on the door frame or the wall.

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