Fireproof door closer and signal feedback module mounting structure thereof

Abstract

The utility model relates to a fireproof door closer and a signal feedback module installation structure thereof, which comprise a feedback support, an installation cavity is arranged at the top of the feedback support, a signal feedback switch assembly is arranged in the installation cavity, a first through hole and a second through hole are arranged on a bottom plate of the installation cavity, and the first through hole is used for the trigger end of the signal feedback switch assembly to extend downwards. A second through hole is formed in the feedback support, an auxiliary positioning hook is arranged at the second through hole, a fixing part is further arranged on the feedback support, a vertically-through locking screw hole is formed in the fixing part, a locking bolt is in threaded connection with the interior of the locking screw hole, and when the locking bolt is not locked, the door closer sliding block can push the feedback support to synchronously move in the sliding groove through the auxiliary positioning hook in the door closing process. After the locking bolt is locked, the auxiliary positioning hook can be pressed upwards into the second through hole when the sliding block slides to pass through the feedback support. The auxiliary positioning hook has the advantages that the auxiliary positioning hook can automatically, quickly and accurately assist in positioning and mounting of the feedback support, mounting on a sliding door face and a pushing door face is not affected, and applicability is good.

Description

Technical Field

[0001] This utility model relates to the technical field of building fire protection equipment and electric door closers, specifically to a fire door closer and its signal feedback module installation structure. Background Technology

[0002] Fire door closers are mainly used on fire doors in various public or commercial settings, and their components have high requirements for fire safety. Intelligent fire door closers (electric door closers) have remote control opening and closing functions and signal feedback functions.

[0003] The installation of electric door closers is quite complicated, especially the installation of the signal feedback module. Installers need to repeatedly adjust the opening and closing positions to ensure accurate signal feedback after the door is in position. Because the slider and feedback bracket need to work together, the positioning requirements are high, and it cannot be guaranteed to be adjusted to the correct position on the first try. This necessitates a structure or tool to assist in installation and positioning. Currently, there are no such structures or tools on the market to assist in installation and positioning. Currently, workers need to manually adjust the position of the feedback bracket multiple times and test the sensitivity of the closing feedback at the corresponding position, which is time-consuming and labor-intensive. Furthermore, electric door closers can be installed on either sliding or pulling doors. When installed on a sliding door, the slider in the track will move beyond the feedback bracket during opening and closing. Therefore, to ensure that the electric door closer can be installed on both sliding and pulling doors, it is also necessary to ensure that after the feedback bracket is fixed in the track, the slider can move beyond the feedback bracket if necessary. In other words, based on the above reasons, after the feedback bracket of the existing electric door closer is fixed in the slide groove, the slider can pass through the feedback bracket when sliding in the slide groove. The feedback bracket will not significantly obstruct the slider. This is also one of the reasons why it is difficult to quickly and accurately locate the position of the feedback bracket when positioning it after the door is closed. Utility Model Content

[0004] This utility model provides a fire door closer and its signal feedback module installation structure, aiming to overcome the above-mentioned shortcomings of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A signal feedback module installation structure for a fire door closer includes a feedback bracket installed in the sliding groove of the closer. The top of the feedback bracket has an upward-opening mounting cavity. A signal feedback switch assembly is installed in the mounting cavity. A first through hole and a second through hole are opened on the bottom plate of the mounting cavity. The first through hole allows the trigger end of the signal feedback switch assembly to extend downward to below the bottom surface of the bottom plate. An auxiliary positioning hook is provided at the second through hole. The feedback bracket also has a fixing part. The fixing part has a vertically penetrating locking screw hole. A locking bolt is threaded into the locking screw hole. When the locking bolt is not tightened, during the closing process, the slider of the closer can push the feedback bracket to move synchronously in the sliding groove through the auxiliary positioning hook. After the locking bolt is tightened, the slider can slide under the feedback bracket and press the auxiliary positioning hook upward into the second through hole when passing the feedback bracket.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the auxiliary positioning hook is a rigid, elongated plastic strip, the second through hole is an elongated hole extending in the left-right direction, one end of the plastic strip is fixedly connected to one end wall of the elongated hole, and the other end of the plastic strip extends to the other end of the elongated hole and bends downward to form a hook-shaped head extending below the bottom surface of the base plate.

[0008] Furthermore, the plastic strip and the feedback bracket are integrally formed from the same type of plastic, and both sides of the hook-shaped head are set as bevels.

[0009] Furthermore, the auxiliary positioning hook is a metal spring with a hook-shaped head extending through the second through hole to the bottom surface of the base plate.

[0010] Furthermore, one end of the hook-shaped head is the free end of the metal spring, and the other end of the metal spring is fixedly connected to the base plate by a fixing screw.

[0011] Furthermore, the signal feedback switch assembly includes a micro switch, and a fixing groove formed by multiple limiting posts and multiple elastic buckles is provided around the first through hole in the mounting cavity. After the micro switch is pressed into the fixing groove, it is fixed by the limiting posts and elastic buckles.

[0012] Furthermore, the micro switch is electrically connected to the main control circuit board located on the limiting bracket via a spiral wire.

[0013] Furthermore, the micro switch is electrically connected to one end of the spiral wire via a sub-control circuit board located in the mounting cavity, and the other end of the spiral wire is electrically connected to the main control circuit board located on the limiting bracket. The sub-control circuit board integrates a manual door closing button, and the base plate is provided with a button hole corresponding to the manual door closing button.

[0014] Furthermore, the first through hole and the second through hole are respectively provided on the front and rear sides of the feedback bracket base plate, and the locking screw hole is located in the middle of the base plate and corresponds to the bottom opening of the slide groove.

[0015] This utility model also provides a fire door closer, which has the above-mentioned signal feedback module installation structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The fire door closer and its signal feedback installation structure provided by this utility model have an auxiliary positioning hook. When the feedback bracket is positioned in the slide groove to close the door, the auxiliary positioning hook can be pushed and moved synchronously by the slider that slides along the slide groove when the door is closed. During the synchronous movement, the slider has determined the trigger end of the signal feedback switch component on the feedback bracket. Because of the presence of the auxiliary positioning hook, the feedback bracket moves synchronously with the slider. Therefore, the position of the feedback bracket in the slide groove when the door is closed is its precise fixed position. At this time, it is only necessary to tighten the locking bolt to position it, and the installation of the feedback bracket is completed. There is no need for manual alignment adjustment or post-test adjustment, and the installation efficiency is significantly improved.

[0018] In addition, when the door closer is installed on the push door surface, the slider will slide under the feedback bracket that has been positioned and fixed in the slide groove during the opening and closing process. In this utility model, when the auxiliary positioning hook is subjected to greater pressure, it can retract into the second through hole to make way for the slider. That is, the fire door closer signal feedback module installation structure provided by this utility model can automatically and accurately position the installation position of the feedback bracket, and does not affect the installation of the door closer on the push door surface. It is applicable to both push door surfaces and pull door surfaces, and has good applicability. Attached Figure Description

[0019] Figure 1 An isometric view of a fire door closer (with a signal feedback module mounting structure) provided for this utility model;

[0020] Figure 2 for Figure 1 A cross-sectional view of the fire door closer shown.

[0021] Figure 3 for Figure 2 The image shows an enlarged view of the installation structure of the signal feedback module.

[0022] Figure 4 for Figure 3 The diagram shown is a cross-sectional isometric view of the installation structure of the signal feedback module (showing the slider that it works with);

[0023] Figure 5 for Figure 3 The image shows an isometric view of the installation structure of the signal feedback module.

[0024] Figure 6 for Figure 5 The image shows an isometric view of the signal feedback module mounting structure viewed from one side of the mounting cavity (locking bolts are not shown).

[0025] Figure 7 for Figure 5 The image shows an isometric view of the signal feedback module mounting structure viewed from the bottom side of the base plate (locking bolts are not shown).

[0026] Figure 8 An exploded view of the mounting structure of a signal feedback module with a sub-control circuit board;

[0027] Figure 9 An exploded view of the signal feedback module installation structure without the sub-control circuit board;

[0028] Figure 10 Axonometric drawing of the signal feedback module mounting structure when the auxiliary positioning hook is a metal spring;

[0029] Figure 11 for Figure 10 The diagram shows a cross-sectional view of the signal feedback module installation structure.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Slide groove; 2. Feedback bracket; 3. Slider; 4. Limit bracket; 5. Mounting cavity; 6. First through hole; 7. Second through hole; 8. Auxiliary positioning hook; 9. Fixing part; 10. Locking screw hole; 11. Locking bolt; 12. Metal spring; 13. Fixing screw; 14. Micro switch; 15. Spiral; 16. Limit post; 17. Elastic buckle; 18. Main control circuit board; 19. Sub-control circuit board; 20. Manual door closing button; 21. Button hole. Detailed Implementation

[0032] The principles and features of this utility model are described below with reference to the accompanying drawings and specific embodiments. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0033] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0034] like Figures 1 to 11 As shown, this utility model provides a signal feedback module installation structure for a fire door closer, which includes a feedback bracket 2 installed in the door closer slide groove 1. The top of the feedback bracket 2 has an upward-opening mounting cavity 5, and a signal feedback switch assembly is installed in the mounting cavity 5. The bottom plate of the mounting cavity 5 has a first through hole 6 and a second through hole 7. The first through hole 6 allows the trigger end of the signal feedback switch assembly to extend downward to below the bottom surface of the bottom plate. The second through hole 7 has an auxiliary positioning hook 8. The feedback bracket 2 also has a fixing part 9, and the fixing part 9 has a vertically penetrating locking screw hole 10. The locking screw hole 10 is threaded with a locking bolt 11. When the locking bolt 11 is not tightened, during the closing process, the door closer slider 3 can push the feedback bracket 2 to move synchronously in the slide groove 1 through the auxiliary positioning hook 8. After the locking bolt 11 is tightened, the slider 3 can slide under the feedback bracket 2 and press the auxiliary positioning hook 8 upward into the second through hole 7 when passing the feedback bracket 2.

[0035] It should be noted that during the closing process, due to the presence of the auxiliary positioning hook, the slider will drive the feedback bracket to move synchronously to the closed position, achieving precise positioning. When the slider contacts the auxiliary positioning hook, the trigger end of the signal feedback switch component is also triggered. Therefore, when the door is closed, simply tightening the locking bolt is sufficient to fix the feedback bracket in the slide groove. When the door closer is installed on the push door surface, the slider will move back and forth to the front and rear positions of the feedback bracket during the closing process. Therefore, in order to ensure its application on the push door surface and not affect the slider's movement through the feedback bracket, the auxiliary positioning hook needs to deform towards the second through hole under significant pressure so that the slider can successfully pass under the feedback bracket. This ensures that the auxiliary positioning hook can accurately assist in positioning without affecting the installation on the push door surface, maintaining good applicability.

[0036] A fire door closer typically includes a fire door linkage track (referred to as the track), an opening and closing actuator, and a hydraulic device. During installation, the track is mounted on the fire door frame, and the hydraulic device is mounted on the fire door leaf. The hydraulic device and the slider on the track are connected via the opening and closing actuator. In on-site installation, the fire door closer is sometimes mounted on the push door surface and sometimes on the pull door surface, which are the front and back sides of the door, respectively. When mounted on the push door surface, the slider will move beyond the feedback bracket during opening and closing and then return to its original position. When mounted on the pull door surface, it will not move beyond the feedback bracket.

[0037] In one embodiment of this utility model, such as Figures 4 to 7 As shown, the auxiliary positioning hook 8 is a rigid, elongated plastic strip, and the second through hole 7 is an elongated hole extending in a left-right direction. One end of the plastic strip is fixedly connected to one end wall of the elongated hole, and the other end of the plastic strip extends towards the other end of the elongated hole and bends downward to form a hook-shaped head extending below the bottom surface of the base plate. The plastic strip and the feedback bracket 2 are integrally molded from the same type of plastic, and both sides of the hook-shaped head are set as bevels.

[0038] It should be noted that setting the left and right sides of the hook-shaped head as inclined surfaces is to ensure that the slider generates a large horizontal force on the auxiliary positioning hook. Figure 3 In F1), the hook-shaped head can move towards the second through hole under the action of a component force in the vertical direction. This is equivalent to retracting into the second through hole when the pressure is large enough, allowing the slider to move beyond the feedback bracket. Generally speaking, when the feedback bracket is not locked by the locking bolt, its sliding in the groove does not need to overcome excessive force; it is mainly the resultant force of frictional resistance and the tension of the helix. Figure 3 As shown in F2, at this time the hook head basically does not deform into the second through hole, and the slider pushes the feedback bracket to move synchronously through the auxiliary positioning hook.

[0039] In one embodiment of this utility model, such as Figure 10 and 11 As shown, the auxiliary positioning hook 8 is a metal spring 12, which has a hook-shaped head that extends through the second through hole 7 to the bottom surface of the base plate.

[0040] It should be noted that the stiffness and elasticity of metal springs are relatively easy to control. Custom-sized metal springs can be manufactured to ensure that they can move the feedback bracket with minimal vertical retraction when the door is fully closed, and that even after the feedback bracket is locked, the slider's movement beyond the sliding bracket does not overcome excessive force from the auxiliary positioning hook. Furthermore, metal springs are more durable and generally have a longer lifespan than plastic auxiliary positioning hooks. However, their disadvantage is that they cannot be integrally molded with the feedback bracket and require separate fastening with screws or similar fasteners.

[0041] In one embodiment of this utility model, the end where the hook-shaped head is located is the free end of the metal spring 12, and the other end of the metal spring 12 is fixedly connected to the base plate by a fixing screw 13.

[0042] like Figure 11 As shown, one end of the metal spring is fixedly connected to the base plate of the feedback bracket by a fixing screw (preferably two fixing screws spaced apart and side by side), and the other end is bent in the direction of the fixing screw after passing around a stop 9, and first bent to form a right-angled step surface and then to form a slope surface. The hook head includes the right-angled step surface and the slope surface.

[0043] When the right-angled step surface is acted upon by the slider, a relatively large force is required to press the hook head of the metal spring into the second through hole. If the feedback bracket is not fixed within the slide groove, the hook head of the metal spring will not be pressed into the second through hole; instead, the slider will push the feedback bracket to move synchronously to the closed position, achieving automatic positioning. If the feedback bracket is fixed within the slide groove, a larger force exerted by the slider on the right-angled step surface will press the hook head into the second through hole to allow the slider to pass. Furthermore, when the slider approaches the hook head from another direction and first contacts the ramp surface, due to the design of the ramp surface, a relatively small force is required to press the hook head into the second through hole.

[0044] It should be noted that, from Figure 11 As can be seen, in order to prevent the metal spring from warping upward when subjected to the action of the slider in the closing direction, a blocking block can be set inside the metal spring, and the blocking block is fixed on the feedback bracket.

[0045] In one embodiment of this utility model, such as Figure 8 and 9 As shown, the signal feedback switch assembly includes a micro switch 14. The mounting cavity 5 is provided with a fixing groove surrounded by multiple limiting posts 16 and multiple elastic buckles 17 around the first through hole 6. After the micro switch 14 is pressed into the fixing groove, it is fixed by the limiting posts 16 and elastic buckles 17.

[0046] It should be noted that the micro switch used in this invention is a small micro switch, which is generally integrated onto a circuit board or connected to the circuit board via wires and then to the main control circuit board via a spiral wire. Micro switches are small in size and inconvenient to install by snapping them together from top to bottom. This invention uses a side-force-bearing and four-sided positioning method to fix it to the feedback bracket. The two opposite sides of the micro switch are set as inclined surfaces, and corresponding matching supporting inclined surfaces are provided on the limiting posts at both ends of the fixing groove. The elastic buckle presses and fixes the micro switch from above.

[0047] In one embodiment of this utility model, such as Figure 9 As shown, the micro switch 14 is electrically connected to the main control circuit board 18 located on the limit bracket 4 via a spiral 15.

[0048] It should be noted that this method can save a sub-control circuit board, eliminating the need to install a separate sub-control circuit board on the feedback bracket. However, this also makes it impossible to manually control the door opening and closing signal at the feedback bracket.

[0049] In one embodiment of this utility model, such as Figure 8 As shown, the micro switch 14 is electrically connected to one end of the spiral 15 via a sub-control circuit board 19 located in the mounting cavity 5, and the other end of the spiral 15 is electrically connected to the main control circuit board 18 located on the limiting bracket 4. The sub-control circuit board 19 integrates a manual door closing button 20, and the base plate is provided with a button hole 21 corresponding to the manual door closing button 20.

[0050] It should be noted that this installation method ensures that a closing signal can be given via a manual closing button at the feedback bracket.

[0051] In one embodiment of the present invention, the first through hole 6 and the second through hole 7 are respectively provided on the front and rear sides of the bottom plate of the feedback bracket 2, and the locking screw hole 10 is located in the middle of the bottom plate and corresponds to the bottom opening of the slide groove 1.

[0052] Based on the above implementation examples, this utility model also provides a fire door closer, which has the above-mentioned signal feedback module mounting structure.

[0053] It should be noted that when the electric door closer is installed on a push door, the slider will move past the feedback bracket and then back during the opening and closing process. However, when the electric door closer is installed on a pull door, the slider will not move past the feedback bracket during the opening and closing process. Therefore, the design of an automatically positioning feedback bracket must consider both scenarios, as it may be installed on either the pull or push door side in practice. The feedback bracket and the limit bracket are connected by a spiral. During installation, the position of the limit bracket is first fixed. When the door closes, the closed position is determined, and the slider moves to the closed position, simultaneously moving the feedback bracket to its installation position. The installer then only needs to tighten the locking bolts on the feedback bracket to complete the installation. The slider has a boss; when it reaches the closed position, the boss presses against the signal feedback switch (trigger end), achieving door closing and signal feedback. When the slider pushes the feedback bracket in the closing direction, it needs to overcome the tension and friction of the spiral; conversely, it only needs to overcome friction. The feedback bracket is designed with a guide hook (auxiliary positioning hook). The hook adopts a cantilever beam structure design, which can deform and rebound vertically. When the slider is pushed, a certain force is required to deform the hook. After the feedback bracket is fixed in the slide groove, during the closing process, the slider can move on the feedback bracket because the hook can deform and make way, without affecting the opening and closing of the door.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An installation structure for a signal feedback module of a fire door closer, characterized in that, The system includes a feedback bracket (2) installed in a door closer slide groove (1). The top of the feedback bracket (2) has an upward-opening mounting cavity (5). A signal feedback switch assembly is installed in the mounting cavity (5). A first through hole (6) and a second through hole (7) are provided on the bottom plate of the mounting cavity (5). The first through hole (6) allows the trigger end of the signal feedback switch assembly to extend downward to below the bottom surface of the bottom plate. An auxiliary positioning hook (8) is provided at the second through hole (7). The feedback bracket (2) also has a fixing part (9). The fixing part (9) has an opening... A locking screw hole (10) is provided that runs vertically through the door. A locking bolt (11) is threaded into the locking screw hole (10). When the locking bolt (11) is not tightened, the door closer slider (3) can push the feedback bracket (2) to move synchronously in the slide groove (1) through the auxiliary positioning hook (8) during the closing process. After the locking bolt (11) is tightened, the slider (3) can slide under the feedback bracket (2) and press the auxiliary positioning hook (8) upward into the second through hole (7) when passing the feedback bracket (2).

2. The signal feedback module installation structure for a fire door closer according to claim 1, characterized in that, The auxiliary positioning hook (8) is a rigid, long plastic strip, and the second through hole (7) is a long hole extending in the left and right direction. One end of the plastic strip is fixedly connected to one end wall of the long hole, and the other end of the plastic strip extends to the other end of the long hole and bends downward to form a hook-shaped head extending below the bottom surface of the base plate.

3. The signal feedback module installation structure for a fire door closer according to claim 2, characterized in that, The plastic strip and the feedback bracket (2) are integrally formed from the same type of plastic, and both sides of the hook-shaped head are set as inclined surfaces.

4. The signal feedback module installation structure for a fire door closer according to claim 1, characterized in that, The auxiliary positioning hook (8) is a metal spring (12), which has a hook-shaped head that extends through the second through hole (7) to the bottom surface of the base plate.

5. The signal feedback module installation structure for a fire door closer according to claim 4, characterized in that, The hook-shaped head is located at one end of the free end of the metal spring (12), and the other end of the metal spring (12) is fixedly connected to the base plate by a fixing screw (13).

6. The signal feedback module installation structure for a fire door closer according to claim 1, characterized in that, The signal feedback switch assembly includes a micro switch (14). The mounting cavity (5) is provided with a fixing groove surrounded by multiple limiting posts (16) and multiple elastic buckles (17) around the first through hole (6). After the micro switch (14) is pressed into the fixing groove, it is fixed by the limiting posts (16) and elastic buckles (17).

7. The signal feedback module installation structure for a fire door closer according to claim 6, characterized in that, The micro switch (14) is electrically connected to the main control circuit board (18) located on the limit bracket (4) via a spiral (15).

8. The signal feedback module installation structure for a fire door closer according to claim 6, characterized in that, The micro switch (14) is electrically connected to one end of the spiral (15) via a sub-control circuit board (19) located in the mounting cavity (5). The other end of the spiral (15) is electrically connected to the main control circuit board (18) located on the limiting bracket (4). The sub-control circuit board (19) integrates a manual door closing button (20), and the base plate is provided with a button hole (21) corresponding to the manual door closing button (20).

9. The signal feedback module installation structure for a fire door closer according to any one of claims 1 to 8, characterized in that, The first through hole (6) and the second through hole (7) are respectively provided on the front and rear sides of the bottom plate of the feedback bracket (2), and the locking screw hole (10) is located in the middle of the bottom plate and corresponds to the bottom opening of the slide groove (1).

10. A fire door closer, characterized in that, It has the signal feedback module mounting structure as described in any one of claims 1 to 9.

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