Push-locking support fixing adjusting structure and fireproof door closer containing same

Abstract

The utility model discloses a kind of support fixed adjusting structure of pressing locking and fire door closer containing it, it includes support body, sliding slot and pressing locking mechanism, pressing locking mechanism includes shell, locking pin, reset spring and button, shell is fixed on support body, shell has hollow cavity, shell upper end and lower end all have the opening being communicated with hollow cavity, locking pin is located in hollow cavity and both ends correspond from the upper and lower two end openings of shell and protrude, locking pin is located on the outer wall of the pin body in hollow cavity and is equipped with a circle of blocking ring, reset spring is sleeved on locking pin, the lower end of reset spring is tightly contacted with blocking ring, upper end is tightly contacted with the inner wall of shell upper end, shell lower end opening both sides are symmetrically equipped with support lug, button includes cam portion and pressing handle, one end of pressing handle is rotatably connected with two support lug by cam portion. Advantage is, this fixed adjusting structure when installing and adjusting, basically need not tool auxiliary, more convenient than the mode of screw locking and adjustment frequency is not limited.

Description

Technical Field

[0001] This utility model belongs to the technical field of building fire protection equipment, specifically relating to a press-lock bracket fixing and adjustment structure and a fire door closer containing the same. Background Technology

[0002] Fire door closers are mainly used on fire doors in various public or commercial settings, and the requirements for their opening and closing states vary depending on the situation. Generally, electric door closers have a bracket designed within the track, which can be adjusted within a certain range along the length of the track. During operation, the bracket needs to be securely fastened within the track. The existing method uses screws and nuts for fixing, with the nuts pre-embedded in the bracket. During installation, the screw is screwed into the nut, passing through the bracket and pressing against the top wall of the track to lock it in place. This fastening method has many drawbacks, which can seriously affect the door closer's opening and closing function: for example, if the screw is tightened too much, it can cause the top of the track to whiten, deform, or even deform the entire track; furthermore, if the screw is too tight, it can damage or deform the bracket; while if the screw is too loose, the bracket will slide. Therefore, it is necessary to design a new fixing and adjustment structure to better position the bracket within the track. Utility Model Content

[0003] This utility model provides a press-lock bracket fixing and adjustment structure and a fire door closer containing the same, aiming to avoid many problems that exist in fixing the bracket in the slide groove by screws and nuts.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A press-lock bracket fixing and adjusting structure includes a bracket body, a slide groove, and a press-locking mechanism for fixing the bracket body in the slide groove. The press-locking mechanism includes a housing, a locking pin, a return spring, and a button. The housing is fixed to the bracket body and has a hollow cavity. The upper and lower ends of the housing have openings communicating with the hollow cavity. The locking pin is disposed in the hollow cavity and its two ends extend from the upper and lower openings of the housing, respectively. A retaining ring is provided on the outer wall of the locking pin inside the hollow cavity. The return spring is sleeved on... On the locking pin, the lower end of the return spring abuts against the blocking ring, and the upper end abuts against the inner wall of the upper end of the housing. Support ears are symmetrically provided on both sides of the lower opening of the housing. The button includes a cam part and a pressing handle. One end of the pressing handle is rotatably connected to the two support ears through the cam part. When the pressing handle drives the cam part to rotate, the locking pin undergoes axial extension and retraction movement under the dual action of the cam part and the return spring. When the pressing handle is pressed, causing the cam part to rotate to the maximum pressure acting on the locking pin, the upper end of the locking pin extends upward to its longest length and passes through the bracket body before abutting against the top wall of the slide groove and locking.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, the housing is detachably connected to a lower shell and an upper shell. The upper shell includes a cylindrical body 1 with a closed upper end and an open lower end. The center of the closed end wall of the upper shell is provided with an opening for the upper end of the locking pin to pass through. The outer wall of the cylindrical body 1 is provided with a plurality of connecting ears extending radially. The connecting ears are fixedly connected to the bracket body by screws. The lower shell includes a cylindrical body 2 with an open upper end and a closed lower end. The center of the closed end wall of the cylindrical body 2 is provided with an opening for the lower end of the locking pin to pass through. The supporting ears are symmetrically provided on the lower side of the closed end wall of the cylindrical body 2. The upper end of the cylindrical body 2 is threadedly connected to the cylindrical body 1.

[0007] Furthermore, there are two connecting ears, which are spaced 145-160° apart in the circumferential direction of the cylindrical body to allow space for the pressing handle that drives the cam part to rotate.

[0008] Furthermore, the opening on the closed end wall of the second cylindrical body is provided with an anti-rotation groove along the radial direction, and the lower outer wall of the locking pin is provided with an anti-rotation ear. The anti-rotation ear is inserted into the anti-rotation groove so that the locking pin has only axial extension and retraction freedom relative to the second cylindrical body.

[0009] Furthermore, the cam portion is rotatably connected to the support ear via a connecting shaft between the two support ears.

[0010] Furthermore, the upper end of the locking pin is provided with an anti-slip pad or anti-slip texture.

[0011] Furthermore, the pressing handle is a handle bent at 90°, and one end of the handle is provided with the cam portion. When the handle is rotated to the point where the end away from the cam portion points vertically upward, the cam portion rotates to the position that provides the maximum pressure to the locking pin, and at this time the cam portion abuts against and is held against the lower surface of the locking pin through a section of planar rim.

[0012] Furthermore, the housing is detachably connected to a lower shell and an upper shell, with the upper shell snapped onto or integrally formed onto the support body, and the detachable connection between the lower shell and the upper shell is either snap-fit ​​or threaded.

[0013] Furthermore, the bracket body is fixed in the slide groove by the pressing and locking mechanisms respectively provided at both ends.

[0014] This utility model also provides a fire door closer, which includes the bracket fixing and adjusting structure described in any of the above claims.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The bracket body of the bracket fixing and adjusting structure provided by this utility model is fixed in the slide groove by a pressing and locking component. When the position of the bracket needs to be adjusted, simply pull down the pressing handle to rotate the cam part and release the locking pin. The locking pin retracts under the action of the return spring and loses its pressing and positioning against the top wall of the slide groove, thus unlocking the bracket body and allowing its position to be adjusted. After adjustment, press the pressing handle again to rotate the cam part and press the locking pin, causing the locking pin to extend upward and press against the top wall of the slide groove to achieve the positioning of the bracket body in the slide groove. Locking, unlocking, and adjustment are basically tool-free, which is quite convenient. Compared with screw locking, there is no problem of stripping the screw after repeated twisting, so the opening position can be adjusted at any time and the number of adjustments is unlimited. In addition, since the extent to which the locking pin extends when the cam part rotates is fixed, there is no problem of over-tightening damaging the slide groove or crushing the bracket body. Attached Figure Description

[0017] Figure 1 This is an isometric view of a press-lock bracket fixing and adjusting structure according to the present invention;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of the location of the right-side pressing and locking mechanism of the fixed adjustment structure shown;

[0019] Figure 3 for Figure 2 A cross-sectional view of the bracket fixing and adjustment structure shown (the slide opening faces downward and is cut along the centerline of the locking pin in the left and right directions);

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the center-press locking mechanism;

[0021] Figure 5 for Figure 2 A schematic diagram of the middle pressing locking mechanism (press handle not shown);

[0022] Figure 6 for Figure 3 Axonometric view of the central pressing locking mechanism in the locked state;

[0023] Figure 7 for Figure 3 Axonometric view of the locking mechanism in the unlocked state.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Bracket body; 2. Slide groove; 3. Press-locking mechanism; 4. Locking pin; 5. Return spring; 6. Blocking ring; 7. Support ear; 8. Cam part; 9. Press handle; 10. Lower shell; 11. Upper shell; 12. Connecting ear; 13. Screw; 14. Anti-rotation ear; 15. Anti-slip texture; 16. Connecting shaft. Detailed Implementation

[0026] The technical solution provided by this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] 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.

[0028] like Figures 1 to 7 As shown, this utility model provides a press-lock bracket fixing and adjusting structure, which includes a bracket body 1, a slide groove 2, and a press-locking mechanism 3 for fixing the bracket body 1 in the slide groove 2. The press-locking mechanism 3 includes a housing, a locking pin 4, a return spring 5, and a button. The housing is fixed to the bracket body 1 and has a hollow cavity. The upper and lower ends of the housing have openings communicating with the hollow cavity. The locking pin 4 is disposed in the hollow cavity and its two ends extend from the upper and lower openings of the housing, respectively. A retaining ring 6 is provided on the outer wall of the locking pin 4 located in the hollow cavity. The return spring 5 is sleeved on the locking pin 4. The lower end of the return spring 5 abuts against the blocking ring 6, and the upper end abuts against the inner wall of the upper end of the housing. The lower end of the housing has symmetrical support ears 7 on both sides of the opening. The button includes a cam part 8 and a pressing handle 9. One end of the pressing handle 9 is rotatably connected to the two support ears 7 through the cam part 8. When the pressing handle 9 drives the cam part 8 to rotate, the locking pin 4 undergoes axial extension and retraction movement under the dual action of the cam part 8 and the return spring 5. When the pressing handle 9 is pressed, the cam part 8 rotates to the maximum pressure acting on the locking pin 4. The upper end of the locking pin 4 extends upward to its longest length and passes through the bracket body 1 before abutting against the top wall of the slide groove 2 and locking.

[0029] It should be noted that the above-mentioned bracket fixing and adjustment structure can be used for fixing and adjusting the limit bracket in the door closer slide groove, and can also be used for fixing and adjusting the feedback bracket.

[0030] In one embodiment of this utility model, the housing is detachably connected to a lower shell 10 and an upper shell 11. The upper shell 11 includes a cylindrical body 1 with a closed upper end and an open lower end. The center of the closed end wall of the upper shell 11 is provided with an opening for the upper end of the locking pin 4 to pass through upward. The outer wall of the cylindrical body 1 is provided with a plurality of connecting ears 12 extending radially. The connecting ears 12 are fixedly connected to the bracket body 1 by screws 13. The lower shell 10 includes a cylindrical body 2 with an open upper end and a closed lower end. The center of the closed end wall of the cylindrical body 2 is provided with an opening for the lower end of the locking pin 4 to pass through. The supporting ears 7 are symmetrically provided on the lower side of the closed end wall of the cylindrical body 2. The upper end of the cylindrical body 2 is threadedly connected to the cylindrical body 1.

[0031] It should be noted that the upper and lower shells are preferably made of hard plastic or aluminum alloy. The support ear is integrally formed with the lower shell and the support ear should be made relatively thick to ensure that the support ear is not damaged when pressing or turning the handle.

[0032] In one embodiment of this utility model, such as Figure 4 and 5 As shown, there are two connecting ears 12, and the two connecting ears 12 are spaced 145-160° apart in the circumferential direction of the cylindrical body to reserve space for the movement of the pressing handle 9 that drives the cam part 8 to rotate.

[0033] It should be noted that, as Figure 2 and Figure 6 As shown, since the locking screw 12 and pressing or turning the pressing handle both need to be operated through the bottom opening of the slide groove, both connecting ears and the pressing handle are exposed in the slide groove opening. In order to prevent the connecting ears from interfering with the rotating pressing handle, the two connecting ears are not set to be radially symmetrical but offset by an angle.

[0034] In one embodiment of the present invention, the opening on the closed end wall of the cylindrical body is provided with an anti-rotation groove along the radial direction, and the lower outer wall of the locking pin 4 is provided with an anti-rotation ear 14. The anti-rotation ear 14 is inserted into the anti-rotation groove so that the locking pin 4 has only axial extension and retraction freedom relative to the cylindrical body.

[0035] It should be noted that, in addition to the anti-rotation form of the anti-rotation groove and anti-rotation ear mentioned above, the locking pin can also be set as a square shaft or a hexagonal shaft, and the opening on the lower shell can be set as a square hole or a hexagonal hole accordingly.

[0036] In one embodiment of the present invention, the cam portion 8 is rotatably connected to the support ear 7 via a connecting shaft 16 between the two support ears 7.

[0037] It should be noted that the connecting shaft can be configured to rotate and connect with the connecting holes that are opposite to those on the two support ears.

[0038] In one embodiment of this utility model, the upper end of the locking pin 4 is provided with an anti-slip pad or anti-slip texture 15.

[0039] It should be noted that the anti-slip texture can be set to a serrated shape to effectively increase friction and achieve better positioning. The anti-slip pad can be a rubber sleeve wrapped around the upper end of the locking pin.

[0040] In one embodiment of this utility model, such as Figure 3 , 4 As shown in Figures 6 and 7, the pressing handle 9 is a handle bent at 90°. One end of the handle is provided with the cam part 8. When the handle is rotated to the point where the end away from the cam part 8 points vertically upward, the cam part 8 rotates to the position that provides the maximum pressure to the locking pin 4. At this time, the cam part 8 abuts against and is held against the lower surface of the locking pin 4 through a section of flat rim.

[0041] It is understandable that the handle and cam are preferably integrally molded. Additionally, the pressing handle can also be bent at other angles, an irregularly shaped handle, or simply a straight handle. When unlocking, the cam is closest to the lower end of the locking pin, and this distance is greatest when locked. In the locked state, a flat rim presses against the lower surface of the locking pin; the structure will not unlock itself without manual unlocking, thus providing a built-in locking effect. The dimensions and position of the cam are fixed, which determines the locking pressure, ensuring a predetermined locking force without damaging the slide groove.

[0042] In one embodiment of the present invention, the housing is detachably connected to a lower shell 10 and an upper shell 11. The upper shell 11 is snapped onto or integrally formed onto the support body 1. The detachable connection between the lower shell 10 and the upper shell 11 is either snap-fit ​​or threaded.

[0043] Understandably, for ease of installation, it is preferable to integrally mold the upper shell onto the bracket body.

[0044] In one embodiment of the present invention, the bracket body 1 is fixed in the slide groove 2 by the pressing and locking mechanism 3 provided at both ends.

[0045] This utility model also provides a fire door closer, which includes the bracket fixing and adjusting structure described in any of the above claims.

[0046] 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. A press-locking bracket fixing and adjusting structure, characterized in that, The device includes a bracket body (1), a slide groove (2), and a pressing and locking mechanism (3) for fixing the bracket body (1) in the slide groove (2). The pressing and locking mechanism (3) includes a housing, a locking pin (4), a return spring (5), and a button. The housing is fixed to the bracket body (1) and has a hollow cavity. The upper and lower ends of the housing have openings communicating with the hollow cavity. The locking pin (4) is located in the hollow cavity and its two ends extend from the upper and lower openings of the housing. A retaining ring (6) is provided on the outer wall of the locking pin (4) inside the hollow cavity. The return spring (5) is sleeved on the locking pin (4). The lower end of the return spring (5) is connected to the retaining ring (6). 6) Tighten, the upper end is tight against the inner wall of the upper end of the housing, and the lower end of the housing is symmetrically provided with support ears (7) on both sides of the opening. The button includes a cam part (8) and a pressing handle (9). One end of the pressing handle (9) is rotatably connected to the two support ears (7) through the cam part (8). When the pressing handle (9) drives the cam part (8) to rotate, the locking pin (4) is subjected to the dual action of the cam part (8) and the return spring (5) to make axial extension and retraction movement. When the pressing handle (9) is pressed and the cam part (8) rotates to the maximum pressure acting on the locking pin (4), the upper end of the locking pin (4) extends upward to the longest length and passes through the bracket body (1) and is locked against the top wall of the slide groove (2).

2. The press-locking bracket fixing and adjusting structure according to claim 1, characterized in that, The housing is detachably connected to a lower shell (10) and an upper shell (11). The upper shell (11) includes a cylindrical body one with a closed upper end and an open lower end. The center of the closed end wall of the upper shell (11) is provided with an opening for the upper end of the locking pin (4) to pass through upward. The outer wall of the cylindrical body one is provided with a plurality of connecting ears (12) extending radially. The connecting ears (12) are fixedly connected to the bracket body (1) by screws (13). The lower shell (10) includes a cylindrical body two with an open upper end and a closed lower end. The center of the closed end wall of the cylindrical body two is provided with an opening for the lower end of the locking pin (4) to pass through. The lower side of the closed end wall of the cylindrical body two is symmetrically provided with the supporting ears (7). The upper end of the cylindrical body two is threadedly connected to the cylindrical body one.

3. The press-locking bracket fixing and adjusting structure according to claim 2, characterized in that, There are two connecting ears (12), and the two connecting ears (12) are spaced 145-160° apart in the circumferential direction of the cylindrical body to allow space for the pressing handle (9) that drives the cam part (8) to rotate.

4. The press-locking bracket fixing and adjusting structure according to claim 2, characterized in that, The opening on the closed end wall of the cylindrical body is provided with an anti-rotation groove along the radial direction. The lower outer wall of the locking pin (4) is provided with an anti-rotation ear (14). The anti-rotation ear (14) is inserted into the anti-rotation groove so that the locking pin (4) has only axial extension and retraction freedom relative to the cylindrical body.

5. The press-locking bracket fixing and adjusting structure according to claim 2, characterized in that, The cam portion (8) is rotatably connected to the support ear (7) via a connecting shaft (16) between the two support ears (7).

6. The press-locking bracket fixing and adjusting structure according to claim 2, characterized in that, The upper end of the locking pin (4) is provided with an anti-slip pad or anti-slip texture (15).

7. The press-locking bracket fixing and adjusting structure according to claim 1, characterized in that, The pressing handle (9) is a handle bent at 90°. One end of the handle is provided with the cam part (8). When the handle is rotated to the point where the end away from the cam part (8) points vertically upward, the cam part (8) rotates to the position that provides the maximum pressure to the locking pin (4). At this time, the cam part (8) abuts against and is held against the lower surface of the locking pin (4) through a section of flat rim.

8. The press-locking bracket fixing and adjusting structure according to claim 1, characterized in that, The housing is detachably connected by a lower shell (10) and an upper shell (11). The upper shell (11) is snapped onto or integrally formed on the support body (1). The detachable connection between the lower shell (10) and the upper shell (11) is either snap-fit ​​or threaded.

9. A press-locking bracket fixing and adjusting structure according to any one of claims 1 to 8, characterized in that, The bracket body (1) is fixed in the slide groove (2) by the pressing and locking mechanism (3) provided at both ends.

10. A fire door closer, characterized in that, It includes the bracket fixing and adjusting structure as described in any one of claims 1 to 9.

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