Limiting device for concealed hinge of security door

Abstract

The utility model relates to the field of concealed hinges of anti-theft doors, and discloses a limiting device for concealed hinges of anti-theft doors, which comprises a second hinge, a first hinge is rotatably arranged at one end of the second hinge, two symmetrical inner side walls of one end of the second hinge are rotatably connected with first rotating shafts, and one ends of the two first rotating shafts are respectively fixed with two outer side walls of the first hinge. A connecting mechanism used for being connected with the first hinge is arranged on the side wall of the first hinge, sliding grooves are formed in the two symmetrical side walls of the second hinge, a limiting rod is slidably connected to the top of the second hinge, and the two ends of the limiting rod are slidably connected with the two sliding grooves correspondingly. The adjusting mechanism adjusts the sliding distance of the limiting rod in the sliding groove, the rotating angle of the first hinge can be limited in cooperation with the connecting mechanism, the opening angle of the anti-theft door can be adjusted, the first hinge is buffered through the buffering mechanism, the situation that a door leaf is suddenly closed due to the action of external force or wind is avoided, and the safety of the anti-theft door is improved. Therefore, the service life of the anti-theft door is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of concealed hinges for anti-theft doors, in particular to a limiting device for concealed hinges for anti-theft doors. Background Art

[0002] A security door is a door installed at the entrance of a residential or commercial building. Its main function is to prevent theft and intrusion. Security doors are generally made of strong materials, such as steel or aluminum alloy, and have high security performance. Security doors usually consist of a door frame and a door leaf, which is connected to the door frame through hinges.

[0003] When using security doors, sometimes it is not necessary to open the door completely. It is only necessary to open the door a certain gap to facilitate air circulation or to observe the outdoor situation. However, current security doors can be fully opened and closed when installed. In order to adjust the opening and closing angle, it is completely dependent on manual adjustment. After the adjustment, there is no measure to limit the opening and closing angle of the security door, and it is impossible to ensure that the door remains stable in the open state. The door leaf is prone to sudden closure due to external force or wind, and violent collision between the door leaf and the door frame is prone to occur, causing damage and reducing the service life of the security door. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a limiting device for concealed hinges of anti-theft doors.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The limiting device of the concealed hinge of the anti-theft door comprises a second hinge, wherein one end of the second hinge is rotatably provided with a first hinge, two symmetrical inner side walls of one end of the second hinge are rotatably connected with a first rotating shaft, and one end of the two first rotating shafts are respectively fixed to the two outer side walls of the first hinge, the side wall of the first hinge is provided with a connecting mechanism for connecting the first hinge, the two symmetrical side walls of the second hinge are provided with sliding grooves, the top of the second hinge is slidably connected to a limiting rod, and the two ends of the limiting rod are respectively slidably connected to the two sliding grooves, the side walls at both ends of the limiting rod are sleeved with limiting rings, and the two limiting rings are located at the first The inner wall of the second hinge is provided with an adjustment mechanism for adjusting the limit rod at the top of the second hinge, and the symmetrical inner walls of the second hinge are both provided with a buffer mechanism for buffering the first hinge. During use of the device, the sliding distance of the limit rod in the slide groove is adjusted by the adjustment mechanism, and the rotation angle of the first hinge can be limited in conjunction with the connecting mechanism, thereby realizing the adjustment of the opening angle of the anti-theft door. The first hinge is buffered by the buffer mechanism to prevent the door leaf from being suddenly closed due to external force or wind, causing a violent collision between the door leaf and the door frame, thereby improving the service life of the anti-theft door.

[0007] As a further solution of the utility model, the connecting mechanism includes a connecting rod, the connecting rod is fixed on the inner side wall of one end of the first hinge, the side walls at both ends of the connecting rod are rotatably connected with connecting plates, the side walls of the two connecting plates are provided with connecting grooves, and the two connecting grooves are sleeved on the side walls of the limiting rod, the adjusting mechanism includes an annular sleeve, the annular sleeve is sleeved on the side wall of the limiting rod, the outer side wall of the annular sleeve is fixed with a threaded rod, the side walls of the threaded rod are respectively sleeved with a first threaded sleeve and a second threaded sleeve, the thread directions of the first threaded sleeve and the second threaded sleeve are opposite, and the first threaded sleeve and the second threaded sleeve are both adapted to the threaded rod, and the second hinge A U-shaped seat is fixed on the top, and the inner side walls at both ends of the U-shaped seat are rotatably connected with a second rotating shaft. A sleeve is arranged on the top of the second hinge, and one end of the two second rotating shafts are fixed on the side wall of the sleeve. One end of the threaded rod is sleeved in the sleeve, and a limiting block is fixed at one end of the threaded rod, and the first threaded sleeve and the second threaded sleeve are both located in the middle of the sleeve and the limiting block. By rotating the first threaded sleeve, the threaded rod and the annular sleeve are cooperated to drive the limiting rod to move along the direction of the sliding groove. When the limiting rod moves, the connecting plate is driven to move along the inner wall of the second hinge through the connecting groove, and cooperates with the connecting rod to limit the rotation angle of the first hinge, thereby limiting the opening angle of the anti-theft door.

[0008] As a further solution of the present invention, the buffer mechanism includes a sleeve rod, a ball head is fixed at one end of the sleeve rod, and the ball head is rotatably connected to one end of the connecting plate, a buffer spring is sleeved on the side wall of the sleeve rod, a rectangular frame is fixed on the inner wall of the second hinge, and a connecting block is rotatably connected to the inner wall of the rectangular frame, a through hole is opened on the side wall of the connecting block, and one end of the sleeve rod is penetrated and arranged in the through hole, when it is necessary to close the anti-theft door, the first hinge is rotated, at this time, under the action of the connecting rod, one end of the connecting plate gradually approaches the rectangular frame, and one end of the sleeve rod gradually moves away from the connecting block, at this time, the buffer spring gradually becomes compressed, and under the reaction force of the buffer spring in the compressed state, the connecting plate has a tendency to move in the opposite direction, thereby preventing the anti-theft door from being suddenly closed due to external force or wind, causing a violent collision between the door leaf and the door frame, causing damage to the anti-theft door, and improving the service life of the anti-theft door.

[0009] The beneficial effects of the utility model are:

[0010] 1. During use of the device, the sliding distance of the limit rod in the slide groove is adjusted by the adjustment mechanism, and the rotation angle of the first hinge can be limited in cooperation with the connecting mechanism, so that the opening angle of the anti-theft door can be adjusted.

[0011] 2. During the closing process of the anti-theft door, the buffer mechanism is used to buffer the first hinge to ensure that the door remains stable when open, avoiding the door leaf from closing suddenly due to external force or wind, causing a violent collision between the door leaf and the door frame, causing damage, and prolonging the service life of the anti-theft door. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the position limiting device for the concealed hinge of the anti-theft door proposed by the utility model;

[0013] Figure 2 This is a schematic structural diagram of the first hinge, the connecting rod and the connecting plate of the position limiting device of the concealed hinge of the anti-theft door proposed by the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the slide groove, the limiting rod, the annular sleeve and the threaded rod of the limiting device of the concealed hinge of the anti-theft door proposed by the utility model;

[0015] Figure 4 It is a schematic diagram of the exploded structure of the threaded rod, sleeve, first threaded sleeve and second threaded sleeve of the limiting device of the concealed hinge of the anti-theft door proposed by the utility model;

[0016] Figure 5 The utility model is a schematic diagram of the explosion structure of the connecting groove, sleeve rod, buffer spring and ball head of the limit device of the concealed hinge of the anti-theft door proposed by the utility model.

[0017] In the figure: 1. first hinge; 2. second hinge; 3. first rotating shaft; 4. connecting rod; 5. slide groove; 6. limit rod; 7. connecting plate; 8. rectangular frame; 9. connecting groove; 10. limit ring; 11. annular sleeve; 12. threaded rod; 13. U-shaped seat; 14. second rotating shaft; 15. sleeve; 16. limit block; 17. first threaded sleeve; 18. second threaded sleeve; 19. sleeve rod; 20. buffer spring; 21. connecting block; 22. ball head. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Reference Figure 1-Figure 5The limiting device of the concealed hinge of the anti-theft door comprises a second hinge 2, one end of the second hinge 2 is rotatably provided with a first hinge 1, two symmetrical inner side walls of one end of the second hinge 2 are rotatably connected with a first rotating shaft 3, and one end of the two first rotating shafts 3 are respectively fixed to the two outer side walls of the first hinge 1, the side wall of the first hinge 1 is provided with a connecting mechanism for connecting the first hinge 1, the two symmetrical side walls of the second hinge 2 are provided with sliding grooves 5, the top of the second hinge 2 is slidably connected with a limiting rod 6, and the two ends of the limiting rod 6 are respectively slidably connected to the two sliding grooves 5, the side walls at both ends of the limiting rod 6 are sleeved with limiting rings 10, and the two limiting rings 10 are both positioned On the inner wall of the second hinge 2, an adjustment mechanism for adjusting the limit rod 6 is provided at the top of the second hinge 2, and the two symmetrical inner walls of the second hinge 2 are provided with a buffer mechanism for buffering the first hinge 1. During use of the device, the sliding distance of the limit rod 6 in the slide groove 5 is adjusted by the adjustment mechanism, and the rotation angle of the first hinge 1 can be limited in conjunction with the connecting mechanism, thereby realizing the adjustment of the opening angle of the anti-theft door. The first hinge 1 is buffered by the buffer mechanism to prevent the door leaf from being suddenly closed due to external force or wind, causing a violent collision between the door leaf and the door frame, thereby improving the service life of the anti-theft door.

[0021] Reference Figure 1-Figure 4 In a preferred embodiment, the connecting mechanism includes a connecting rod 4, which is fixed to the inner side wall of one end of the first hinge 1, and the side walls at both ends of the connecting rod 4 are rotatably connected to connecting plates 7, and the side walls of the two connecting plates 7 are provided with connecting grooves 9, and the two connecting grooves 9 are sleeved on the side walls of the limiting rod 6. The adjustment mechanism includes an annular sleeve 11, which is sleeved on the side wall of the limiting rod 6, and the outer side wall of the annular sleeve 11 is fixed with a threaded rod 12, and the side walls of the threaded rod 12 are respectively sleeved with a first threaded sleeve 17 and a second threaded sleeve 18, the thread directions of the first threaded sleeve 17 and the second threaded sleeve 18 are opposite, and the first threaded sleeve 17 and the second threaded sleeve 18 are both adapted to the threaded rod 12, and a U-shaped seat 13 is fixed to the top of the second hinge 2. The inner side walls at both ends of the U-shaped seat 13 are rotatably connected with the second rotating shaft 14, a sleeve 15 is arranged on the top of the second hinge 2, and one end of the two second rotating shafts 14 are fixed on the side wall of the sleeve 15, one end of the threaded rod 12 is sleeved in the sleeve 15, and a limiting block 16 is fixed at one end of the threaded rod 12, and the first threaded sleeve 17 and the second threaded sleeve 18 are both located in the middle of the sleeve 15 and the limiting block 16. By rotating the first threaded sleeve 17, the threaded rod 12 and the annular sleeve 11 are cooperated to drive the limiting rod 6 to move along the direction of the slide groove 5. When the limiting rod 6 moves, the connecting plate 7 is driven to move along the inner wall of the second hinge 2 through the connecting groove 9, and cooperates with the connecting rod 4 to limit the rotation angle of the first hinge 1, so as to limit the opening angle of the anti-theft door.

[0022] Reference Figure 1 and Figure 5In a preferred embodiment, the buffer mechanism includes a sleeve rod 19, a ball head 22 is fixed at one end of the sleeve rod 19, and the ball head 22 is rotatably connected to one end of the connecting plate 7, a buffer spring 20 is sleeved on the side wall of the sleeve rod 19, a rectangular frame 8 is fixed on the inner wall of the second hinge 2, and a connecting block 21 is rotatably connected to the inner wall of the rectangular frame 8, a through hole is opened on the side wall of the connecting block 21, and one end of the sleeve rod 19 is penetrated and arranged in the through hole. When the anti-theft door needs to be closed, the first hinge 1 is rotated. At this time, under the action of the connecting rod 4, one end of the connecting plate 7 gradually approaches the rectangular frame 8, and one end of the sleeve rod 19 gradually moves away from the connecting block 21. At this time, the buffer spring 20 gradually becomes compressed. Under the reaction force of the buffer spring 20 in the compressed state, the connecting plate 7 has a tendency to move in the opposite direction, so as to avoid the anti-theft door from being suddenly closed due to external force or wind, causing a violent collision between the door leaf and the door frame, causing damage to the anti-theft door, and improving the service life of the anti-theft door.

[0023] Working principle of this embodiment: During the use of this device, installation grooves are pre-opened on the door leaf and the side walls of the door frame of the anti-theft door, and the first hinge 1 and the second hinge 2 are fixed in the two installation grooves respectively. When the door needs to be opened a certain gap to facilitate air circulation or to observe the outdoor situation, and the anti-theft door does not need to be fully opened, the first threaded sleeve 17 is rotated to cooperate with the threaded rod 12 and the annular sleeve 11 to drive the limiting rod 6 to move along the direction of the sliding groove 5. When the limiting rod 6 moves a certain distance, the second threaded sleeve 18 is rotated in the opposite direction to make the second threaded sleeve 18 gradually approach the first threaded sleeve 17 until the second threaded sleeve 18 and the first threaded sleeve 17 are tightly fitted. When the limiting rod 6 moves, the connecting groove 9 drives the connecting plate 7 to move along the inner wall of the second hinge 2, and cooperates with the connecting rod 4 to limit the rotation angle of the first hinge 1, so as to limit the opening angle of the anti-theft door and prevent the anti-theft door from being over-opened. When closing the anti-theft door, the first hinge 1 is rotated. At this time, under the action of the connecting rod 4, one end of the connecting plate 7 gradually approaches the rectangular frame 8, and one end of the sleeve rod 19 gradually moves away from the connecting block 21. At this time, the buffer spring 20 gradually becomes compressed. Under the reaction force of the buffer spring 20 in the compressed state, the connecting plate 7 has a tendency to move in the opposite direction, so as to avoid the anti-theft door from being suddenly closed due to external force or wind, causing a violent collision between the door leaf and the door frame, causing damage to the anti-theft door, and improving the service life of the anti-theft door.

[0024] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A position limiting device for a concealed hinge of an anti-theft door, comprising a second hinge (2), characterized in that: The first hinge (1) is rotatably provided at one end of the second hinge (2); two symmetrical inner side walls at one end of the second hinge (2) are rotatably connected with a first rotating shaft (3), and one end of the two first rotating shafts (3) are respectively fixed to the two outer side walls of the first hinge (1); the side wall of the first hinge (1) is provided with a connecting mechanism for connecting the first hinge (1); two symmetrical side walls of the second hinge (2) are provided with sliding grooves (5); the top of the second hinge (2) is slidably connected to a limit rod (6), and two ends of the limit rod (6) are respectively slidably connected to the two sliding grooves (5); the side walls at both ends of the limit rod (6) are sleeved with limit rings (10), and the two limit rings (10) are both located on the inner side wall of the second hinge (2); the top of the second hinge (2) is provided with an adjusting mechanism for adjusting the limit rod (6); and the two symmetrical inner side walls of the second hinge (2) are provided with a buffering mechanism for buffering the first hinge (1).

2. The position limiting device for concealed hinge of anti-theft door according to claim 1, characterized in that: The connecting mechanism comprises a connecting rod (4), the connecting rod (4) being fixed to the inner side wall of one end of the first hinge (1), the side walls at both ends of the connecting rod (4) being rotatably connected to connecting plates (7), the side walls of the two connecting plates (7) being provided with connecting grooves (9), and the two connecting grooves (9) being sleeved on the side walls of the limiting rod (6).

3. The position limiting device for concealed hinge of anti-theft door according to claim 1, characterized in that: The adjusting mechanism comprises an annular sleeve (11), the annular sleeve (11) being sleeved on the side wall of the limiting rod (6), a threaded rod (12) being fixed on the outer side wall of the annular sleeve (11), a first threaded sleeve (17) and a second threaded sleeve (18) being sleeved on the side wall of the threaded rod (12), the thread directions of the first threaded sleeve (17) and the second threaded sleeve (18) being opposite, and the first threaded sleeve (17) and the second threaded sleeve (18) being adapted to the threaded rod (12).

4. The position limiting device for concealed hinge of anti-theft door according to claim 3, characterized in that: A U-shaped seat (13) is fixed on the top of the second hinge (2), and the inner side walls at both ends of the U-shaped seat (13) are rotatably connected to second rotating shafts (14). A sleeve (15) is arranged on the top of the second hinge (2), and one end of the two second rotating shafts (14) are fixed on the side wall of the sleeve (15). One end of the threaded rod (12) is sleeved in the sleeve (15), and a limiting block (16) is fixed on one end of the threaded rod (12), and the first threaded sleeve (17) and the second threaded sleeve (18) are both located in the middle of the sleeve (15) and the limiting block (16).

5. The position limiting device for concealed hinge of anti-theft door according to claim 2, characterized in that: The buffer mechanism comprises a sleeve rod (19), a ball head (22) is fixed to one end of the sleeve rod (19), and the ball head (22) is rotatably connected to one end of a connecting plate (7), and a buffer spring (20) is sleeved on the side wall of the sleeve rod (19).

6. The position limiting device for concealed hinge of anti-theft door according to claim 5, characterized in that: A rectangular frame (8) is fixed on the inner wall of the second hinge (2), and a connecting block (21) is rotatably connected to the inner wall of the rectangular frame (8). A through hole is provided on the side wall of the connecting block (21), and one end of the sleeve rod (19) is inserted into the through hole.

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