Automatic bolt

Abstract

The utility model discloses an automatic bolt, relates to the technical field of bolts, and aims to solve the problem that a bolt rod of a traditional bolt needs to be manually controlled to move through a shifting piece. According to the technical scheme, the bolt is characterized by comprising a bolt body, the bolt body comprises a bolt seat and a bolt rod, the bolt rod is slidably connected into the bolt seat, an opening for the bolt rod to stretch out is formed in the top of the bolt seat, a mounting plate is fixedly connected to one side of the bolt seat, and through holes are formed in the upper end and the lower end of the mounting plate. After the movable latch bolt is pushed into the latch seat, the latch rod can be lifted up through the transmission mechanism, so that the latch rod is automatically inserted into the door frame, the child door and the mother door are fixed, in the process, people do not need to touch the latch rod and the latch seat with hands, and the child door and the mother door can be closed and separated only by opening and closing the door. The child door and the mother door can be locked and unlocked quickly, and the child door and the mother door can be opened quickly at the same time in case of emergency, so that the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of latch technology, and more specifically, to an automatic latch. Background Technology

[0002] Fire doors are typically double doors, consisting of a left and a right side door. To ensure stable opening and closing, latches are usually installed on the top and bottom of the side door. These latches secure the side door to the door frame, preventing it from being easily pushed open in an emergency and ensuring the fire door's airtightness.

[0003] The commonly used latches on the market are concealed latches, which require manual operation of a lever to insert the latch into the door frame. When no one moves the lever, the secondary door will remain closed. In an emergency, it is impossible to quickly open both the secondary and secondary doors for escape.

[0004] Therefore, an automatic latch is needed to solve this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an automatic latch with the advantage of being able to automatically raise and lower the latch rod.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an automatic latch, comprising a latch body, the latch body comprising a latch seat and a latch rod, the latch rod being slidably connected to the latch seat, the top of the latch seat having an opening for the latch rod to extend out, a mounting plate being fixedly connected to one side of the latch seat, through holes being provided at the upper and lower ends of the mounting plate, and a movable opening being provided on the side of the mounting plate away from the latch rod, the movable opening being rotatably connected to a movable tongue by a long fixed pin, the movable tongue being interconnected with the latch rod through a transmission mechanism.

[0007] The present invention is further configured such that: the transmission mechanism includes a connecting rod and a transmission bracket; the connecting rod is fixedly connected to one end of the movable inclined tongue; a second long fixing pin is fixedly connected to the pin seat; the second long fixing pin is located below the first long fixing pin; the bottom surface of the connecting rod abuts against the second long fixing pin; the connecting rod is inclined towards the side closer to the pin rod; the connecting rod and the transmission bracket are rotatably connected to each other through a first short fixing pin; a transmission seat is provided at the top of the transmission bracket; the transmission seat is slidably connected inside the pin seat; the pin seat abuts against the inner wall of the transmission seat; a connecting member for pushing the pin rod to move up and down is provided at the top of the transmission seat; the connecting member is provided inside the pin seat.

[0008] The present invention is further configured such that: a short fixing pin two is fixedly connected to one end of the transmission bracket away from the connecting rod, and a rolling sleeve is sleeved on the outside of the short fixing pin two, and the rolling sleeve is slidably connected to the mounting plate.

[0009] The present invention is further configured such that: the connecting member includes a screw and an inner spring, the screw is fixedly connected to the transmission seat, the pin has a through groove, the screw is slidably connected to the pin, the inner spring is sleeved on the outside of the screw, and the two ends of the inner spring abut against the top surface of the transmission seat and the lower end of the pin, respectively.

[0010] The present invention is further configured such that: a limiting block is fixedly connected to the top of the screw, and a sliding groove is provided inside the pin rod for the limiting block to slide.

[0011] The present invention is further configured such that: an outer spring is sleeved on the outside of the pin rod, the outer spring is disposed inside the pin seat, and the two ends of the outer spring are respectively connected to the top surface of the pin seat and the top surface of the transmission seat.

[0012] The present invention is further configured such that a dust cover is fixedly connected to the side of the pin seat away from the movable opening.

[0013] The present invention is further configured to include an anti-scratch plate, which is disposed on the side opposite to the movable oblique tongue, and the surface of the anti-scratch plate has protrusions corresponding to the shape of the movable oblique tongue.

[0014] In summary, this utility model has the following beneficial effects:

[0015] When closing the child and mother doors, the movable latch will abut against the anti-scratch plate, pushing the movable latch into the bolt seat. This allows the transmission mechanism to lift the bolt rod, inserting it into the door frame and securing the child and mother doors. During this process, people do not need to touch the bolt rod and bolt seat; simply opening and closing the doors is sufficient to close and separate them. The child door can be quickly locked and opened. In case of emergency, both doors can be opened simultaneously, making operation convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 A cross-sectional view of this utility model Figure 1 ;

[0019] Figure 4 A cross-sectional view of this utility model Figure 2 .

[0020] In the diagram: 1. Pin seat; 2. Pin rod; 3. Opening; 4. Mounting plate; 5. Movable opening; 6. Long fixed pin one; 7. Movable tongue; 8. Connecting rod; 9. Transmission bracket; 10. Long fixed pin two; 11. Short fixed pin one; 12. Transmission seat; 13. Short fixed pin two; 14. Rolling sleeve; 15. Screw; 16. Inner spring; 17. Through groove; 18. Limiting block; 19. Slide groove; 20. Outer spring; 21. Dust cover; 22. Anti-scratch plate. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship 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.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] An automatic latch, such as Figures 1-4As shown, the device includes a pin body, which comprises a pin seat 1 and a pin rod 2. The pin rod 2 is slidably connected to the pin seat 1. The top of the pin seat 1 has an opening 3 for the pin rod 2 to extend out. A mounting plate 4 is fixedly connected to one side of the pin seat 1. The mounting plate 4 has through holes at its upper and lower ends. A movable opening 5 is provided on the side of the mounting plate 4 away from the pin rod 2. A movable tongue 7 is rotatably connected to the movable opening 5 via a long fixed pin 6. The movable tongue 7 and the pin rod 2 are connected to each other through a transmission mechanism. The device also includes an anti-scratch plate 22, which is located on the side opposite to the movable tongue 7. The surface of the anti-scratch plate 22 has a surface that is similar to that of the movable tongue 7. During installation, the corresponding protrusions allow the bolt seat 1 to be installed on the child door and the anti-scratch plate 22 to be installed on the mother door. When the child and mother doors are closed, the movable tongue 7 will abut against the anti-scratch plate 22, pushing the movable tongue 7 into the bolt seat 1. This allows the transmission mechanism to lift the bolt rod 2, inserting it into the door frame and securing the child and mother doors. During this process, people do not need to touch the bolt rod 2 and bolt seat 1; simply opening and closing the doors is sufficient to close and separate the child and mother doors. The child door can be quickly locked and opened. In case of emergency, the child and mother doors can also be opened simultaneously, making the operation convenient.

[0025] In one embodiment, the transmission mechanism includes a connecting rod 8 and a transmission bracket 9. The connecting rod 8 is fixedly connected to one end of the movable tongue 7. A second long fixing pin 10 is fixedly connected to the pin seat 1. The second long fixing pin 10 is located below the first long fixing pin 6. The bottom surface of the connecting rod 8 abuts against the second long fixing pin 10. The connecting rod 8 is inclined towards the side closer to the pin rod 2. The connecting rod 8 and the transmission bracket 9 are rotatably connected to each other by a short fixing pin 11. A transmission seat 12 is provided on the top of the transmission bracket 9. The transmission seat 12 is slidably connected to the pin seat 1. The pin seat 1 abuts against the inner wall of the transmission seat 12. A connecting member for pushing the pin rod 2 to move up and down is provided on the top of the transmission seat 12. The connecting member is provided in the pin seat 1. During the pressing of the movable tongue 7, the movable tongue 7 rotates around the first long fixing pin 6, causing the connecting rod 8 to rotate. At the same time, the connecting rod 8 moves away from the pin 2. The end of the movable tongue 7 moves upward, thereby pushing the transmission bracket 9 upward, further pushing the transmission seat 12, so that the transmission seat 12 pushes the pin rod 2 through the connector, thereby fixing the pin rod 2 to the door frame. During this process, the transmission is stable, which can ensure the smooth movement of the pin rod 2. When the movable tongue 7 enters the pin seat 1, the side of the movable tongue 7 near the connecting rod 8 will abut against the long fixed pin 10. The long fixed pin 10 restricts the position of the movable tongue 7 to prevent the movable tongue 7 from entering the pin seat 1 completely and getting stuck. When the double door is opened, the movable tongue 7 is no longer restricted, and the pin rod 2, transmission seat 12, transmission bracket 9 and movable tongue 7 return to their original state. At this time, the bottom of the connecting rod 8 is restricted by the long fixed pin 10, which can prevent the movable tongue 7 from over-extending from the movable opening 5.

[0026] Furthermore, since a short fixing pin 13 is fixedly connected to the end of the transmission bracket 9 away from the connecting rod 8, and a rolling sleeve 14 is sleeved on the outside of the short fixing pin 13, the rolling sleeve 14 is slidably connected to the mounting plate 4. The rolling sleeve 14 rotates between the transmission brackets 9, replacing the transmission bracket 9 in contact with the mounting plate 4, so that the sliding friction of the transmission bracket 9 is changed to rolling friction, thereby reducing the wear of the transmission bracket 9.

[0027] In one embodiment, the connector includes a screw 15 and an inner spring 16. The bottom of the screw 15 is inserted into the transmission seat 12 and welded or threaded onto the transmission seat 12. A through groove 17 is provided in the pin 2. The end of the screw 15 away from the transmission seat 12 slides in the through groove 17. The inner spring 16 is sleeved on the outside of the screw 15, and the two ends of the inner spring 16 abut against the top surface of the transmission seat 12 and the lower end of the pin 2, respectively. During the upward movement of the transmission seat 12, the screw 15 can be driven to move upward. An inner spring 16 is provided between the transmission seat 12 and the pin 2. The inner spring 16 can push the pin 2 to move upward. If the position of the door is not installed in place or misalignment occurs after long-term use, the pin 2 will contact the door frame and compress the inner spring 16 to overlap with the screw 15, protecting the door frame and the pin body and preventing the pin 2 from impacting the door frame and damaging the door frame and the pin body.

[0028] In one embodiment, a limiting block 18 is fixedly connected to the top of the screw 15, and a sliding groove 19 is provided in the pin 2 for the limiting block 18 to slide. The limiting block 18 stabilizes the connection between the screw 15 and the pin 2, so that the pin 2 cannot be pulled out directly from the screw 15 and is not easily damaged during transportation.

[0029] Furthermore, an outer spring 20 is sleeved on the outside of the pin rod 2. The outer spring 20 is located inside the pin seat 1. The two ends of the outer spring 20 are connected to the inner top surface of the pin seat 1 and the top surface of the transmission seat 12, respectively. After the mother and daughter doors are closed, the outer spring 20 will be deformed by the compression of the pin seat 1 and the transmission seat 12. After the mother door is opened, the outer spring 20 loses its restriction and returns to its original state, which can quickly push the transmission seat 12 back to its original position, so that the movable tongue 7 can be quickly reset.

[0030] In one embodiment, a dust cover 21 is fixedly connected to the side of the latch seat 1 away from the movable opening 5. The dust cover 21 is located on the side of the latch seat 1 near the door, which can prevent dust from entering the latch seat 1 from the dust cover 21, so that the parts inside the latch seat 1 can maintain their good mobility.

[0031] The structural principle of this utility model is as follows:

[0032] When the inner and outer doors are closed, the movable latch 7 on the outer door is pressed by the anti-scratch plate 22 on the inner door. The movable latch 7 drives the connecting rod 8 to rotate around the long fixed pin 6, thereby pushing the transmission bracket 9 to move upward. During the upward movement of the transmission bracket 9, the transmission seat 12 is pushed upward, thereby pushing the screw 15 and the inner spring 16, causing the latch rod 2 to extend from the opening 3 and connect with the door frame. The latch rod 2 can fix the outer door to the door frame, preventing the fire door from being easily pushed open in an emergency. This process can be achieved simply by opening and closing the inner and outer doors, without manual intervention, making the operation convenient.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An automatic latch, comprising a latch body, the latch body comprising a latch seat (1) and a latch rod (2), the latch rod (2) being slidably connected within the latch seat (1), the latch seat (1) having an opening (3) at its top for the latch rod (2) to extend out, characterized in that: A mounting plate (4) is fixedly connected to one side of the pin seat (1). The mounting plate (4) has through holes at both the upper and lower ends. A movable opening (5) is opened on the side of the mounting plate (4) away from the pin rod (2). A movable tongue (7) is rotatably connected to the movable opening (5) through a long fixed pin (6). The movable tongue (7) and the pin rod (2) are connected to each other through a transmission mechanism.

2. An automatic latch according to claim 1, characterized in that: The transmission mechanism includes a connecting rod (8) and a transmission bracket (9). The connecting rod (8) is fixedly connected to one end of the movable tongue (7). A long fixing pin two (10) is fixedly connected to the pin seat (1). The long fixing pin two (10) is located below the long fixing pin one (6). The bottom surface of the connecting rod (8) abuts against the long fixing pin two (10). The connecting rod (8) is inclined towards the side closer to the pin rod (2). The connecting rod (8) and the transmission bracket (9) are rotatably connected to each other by a short fixing pin one (11). A transmission seat (12) is provided on the top of the transmission bracket (9). The transmission seat (12) is slidably connected in the pin seat (1). The pin seat (1) abuts against the inner wall of the transmission seat (12). A connecting piece for pushing the pin rod (2) to move up and down is provided on the top of the transmission seat (12). The connecting piece is provided in the pin seat (1).

3. An automatic latch according to claim 2, characterized in that: The transmission bracket (9) is fixedly connected to a short fixing pin two (13) at the end away from the connecting rod (8). A rolling sleeve (14) is sleeved on the outside of the short fixing pin two (13). The rolling sleeve (14) is slidably connected to the mounting plate (4).

4. An automatic latch according to claim 2, characterized in that: The connector includes a screw (15) and an inner spring (16). The screw (15) is fixedly connected to the transmission seat (12). A through groove (17) is provided in the pin (2). The screw (15) is slidably connected in the pin (2). The inner spring (16) is sleeved on the outside of the screw (15), and the two ends of the inner spring (16) abut against the top surface of the transmission seat (12) and the lower end of the pin (2), respectively.

5. An automatic latch according to claim 4, characterized in that: The top of the screw (15) is fixedly connected to a limiting block (18), and the pin (2) has a groove (19) for the limiting block (18) to slide.

6. An automatic latch according to claim 2, characterized in that: An outer spring (20) is sleeved on the outside of the pin rod (2). The outer spring (20) is located inside the pin seat (1). The two ends of the outer spring (20) are connected to the top surface of the pin seat (1) and the top surface of the transmission seat (12), respectively.

7. An automatic latch according to claim 1, characterized in that: A dust cover (21) is fixedly connected to the side of the pin seat (1) away from the movable port (5).

8. An automatic latch according to claim 1, characterized in that: It also includes a scratch-resistant plate (22), which is disposed on the side opposite to the movable oblique tongue (7), and the surface of the scratch-resistant plate (22) has protrusions corresponding to the shape of the movable oblique tongue (7).

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