Dual door automatic bolt mechanism

Abstract

The utility model relates to the field of building hardware discloses a double -leaf door automatic bolt mechanism, including fixed base, the outer wall fixed connection of fixed base has the apron, the outer wall fixed connection of fixed base has the panel, the inner wall sliding connection of panel has the lock tongue, the outer wall fixed connection of lock tongue has the rack support, the gear support is connected with the rack support tooth end meshing, the outer wall rotation is connected with transmission support of gear support, the outer wall rotation is connected with the contraction support of transmission support. In the utility model, through the lock pin contraction, so that the double -leaf door is opened, reaches the adaptation different door body installation, the door opening and closing efficiency is fast. The spring of the inner wall space of contraction support can make the lock pin automatic contraction, can prevent the door when closing one door not to close in place, the other door does the door closing action and appears the lock pin's jam, adopts the rack and pinion engagement transmission to make the lock body thinner effect, also reached the effect that the cost is low, the lock body is short, occupies the space is small and installs the convenience.

Description

Technical Field

[0001] This utility model relates to the field of building hardware, and in particular to an automatic latching mechanism for double doors. Background Technology

[0002] A double door is a door structure composed of two door leaves. It is widely used in building entrances and exits such as shops, office areas, residential entrances, and fire doors in corridors. It can meet the needs of large passage spaces. Since double doors need to ensure the stability of closure and safety of use after closing, automatic bolts have emerged as a matching locking component. They can automatically complete the locking action during the closing process of the door, improving the convenience of use and the reliability of closure.

[0003] Commonly used automatic latches mainly include traditional spring-return latches and manual linkage latches; however, they are not only difficult to adapt to narrow door installation positions, but also the transmission structure of some latches is not compact enough, which increases production and assembly costs and reduces door opening and closing efficiency, making it difficult to meet the needs of installation adaptability, cost control and usage efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a double-door automatic latch mechanism, which aims to improve the problem of difficulty in adapting to narrow door installation positions.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-door automatic latch mechanism, comprising a fixed base, a cover plate fixedly connected to the outer wall of the fixed base, a panel fixedly connected to the outer wall of the fixed base, a latch slidably connected to the inner wall of the panel, a rack and pinion bracket fixedly connected to the outer wall of the latch, a gear bracket meshing with the tooth end of the rack and pinion bracket, a transmission bracket rotatably connected to the outer wall of the gear bracket, a retractable bracket rotatably connected to the outer wall of the transmission bracket, a tension spring fixedly connected to the outer wall of the retractable bracket, a guide bracket slidably connected to the outer wall of the retractable bracket, a spring slidably connected to the inner wall of the guide bracket, and a locking pin fixedly connected to the outer wall of the spring.

[0006] The above technical solution utilizes a rack and pinion mechanism. The movement of the latch moves the rack and pinion bracket, which in turn rotates the gear bracket. This rotation drives the transmission bracket, which in turn moves the retractable bracket. The tension spring moves with the retractable bracket, which in turn moves the locking pin vertically for self-locking, completing the double-door closing process. When the doors need to be opened, the latch is free of external force; the tension spring resets, causing the locking pin to retract, thus opening the double doors. This solution not only adapts to different door types and offers fast opening and closing efficiency, but also incorporates a spring within the retractable bracket to automatically retract the locking pin, preventing the locking pin from jamming when one door is not fully closed while the other is attempting to close. The rack and pinion transmission also results in a thinner lock body, lower cost, shorter lock body, smaller footprint, and convenient installation.

[0007] Preferably, the inner wall of the fixing seat is fixedly connected to the outer wall of the tension spring, and the outer wall of the locking pin is slidably connected to the inner wall slot of the retractable bracket.

[0008] Preferably, the outer wall of the locking tongue is slidably connected to the inner wall of the fixed seat, and the outer wall of the locking pin is slidably connected to the inner wall of the fixed seat.

[0009] Preferably, the outer wall of the locking pin is slidably connected to the inner wall of the panel, and the outer wall of the spring is slidably connected to the inner wall of the retractable bracket.

[0010] Preferably, the outer wall of the guide bracket is fixedly connected to the inner wall of the fixed base.

[0011] Preferably, the outer wall of the fixing base is provided with a first rivet point, the lower surface of the fixing base is provided with a second rivet point, the outer wall of the fixing base is provided with a welding point, the outer wall of the panel is provided with an installation hole, the outer wall of the fixing base is provided with a third rivet point, and the locking pin is provided with an elastic pin inside.

[0012] Preferably, the retractable bracket has a slot, and the outer wall of the locking pin is fixedly connected to the inner wall of the elastic pin.

[0013] Preferably, the slot of the retractable bracket is connected to the outer wall of the locking pin by an elastic pin. The retractable bracket retracts through the slot to prevent the locking pin from getting stuck when one door is not closed properly and the other door is closing.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the locking bolt drives the locking pin to move vertically to achieve self-locking and close the double doors. When the doors need to be opened, the locking bolt is free of external force. The bolt retracts through the tension spring, thereby opening the double doors. This not only achieves the effects of adapting to different door bodies, fast opening and closing efficiency, and the spring installed in the inner wall space of the retractable bracket can make the locking pin retract automatically, preventing the locking pin from getting stuck when one door is not closed properly and the other door is closing. The use of rack and pinion gear meshing transmission makes the lock body thinner, and also achieves the effects of low cost, short lock body, small space occupation and convenient installation.

[0015] 2. In this utility model, the use of screws and rivets is reduced by setting rivet points one, two, and three on the fixing base, thus lowering costs and saving space. The welding points connect the fixing base to the panel, eliminating the need for rivets and making the panel more aesthetically pleasing. The mounting holes improve assembly efficiency. The spring installed in the retractable bracket prevents the lock pin from getting stuck when one door is not fully closed and the other door is attempting to close. Except for the lock tongue, all accessories are made of stamped steel plate. The advantages of stamped steel plate are low cost, high strength, long service life, fast efficiency, thin and short lock body suitable for narrow installations, and low cost and beautiful appearance. Attached Figure Description

[0016] Figure 1 This is a perspective view of a double-door automatic latch mechanism proposed in this utility model; Figure 2 This is a partial structural diagram of the mounting hole of an automatic latch mechanism for double doors proposed in this utility model. Figure 3 This is a cross-sectional schematic diagram of the internal structure of the cover plate of a double-door automatic latch mechanism proposed in this utility model. Figure 4 This is a cross-sectional schematic diagram of the internal structure of the fixed base of the automatic latch mechanism for double doors proposed in this utility model. Figure 5 This is a partial structural diagram of a double-opening automatic latch mechanism for double doors proposed in this utility model. Figure 6 This is a partial structural diagram of the tension spring of the automatic latch mechanism for double doors proposed in this utility model.

[0017] Legend: 1. Fixed base; 2. Cover plate; 3. Panel; 4. Locking tongue; 5. Rack and pinion bracket; 6. Gear bracket; 7. Transmission bracket; 8. Retraction bracket; 9. Tension spring; 10. Guide bracket; 11. Spring; 12. Locking pin; 13. Riveting point one; 14. Riveting point two; 15. Welding point; 16. Mounting hole; 17. Riveting point three; 18. Elastic pin. Detailed Implementation

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0019] Reference Figure 1 , Figure 3 , Figure 4 and Figure 5 An embodiment of this utility model provides: a double-door automatic latch mechanism, including a fixed base 1, a cover plate 2 fixedly connected to the outer wall of the fixed base 1, a panel 3 fixedly connected to the outer wall of the fixed base 1, a latch 4 slidably connected to the inner wall of the panel 3, a rack bracket 5 fixedly connected to the outer wall of the latch 4, a gear bracket 6 meshing with the tooth end of the rack bracket 5, a transmission bracket 7 rotatably connected to the outer wall of the gear bracket 6, a retractable bracket 8 rotatably connected to the outer wall of the transmission bracket 7, a tension spring 9 fixedly connected to the outer wall of the retractable bracket 8, a guide bracket 10 slidably connected to the outer wall of the retractable bracket 8, a spring 11 slidably connected to the inner wall of the guide bracket 10, and a locking pin 12 fixedly connected to the outer wall of the spring 11; Specifically, the movement of the locking tongue 4 drives the rack and pinion bracket 5 to move, which in turn drives the gear bracket 6 to rotate. The panel 3 restricts and guides the locking tongue 4 to ensure its position does not shift during movement. Simultaneously, the locking tongue 4 fixes the rack and pinion bracket 5 to prevent it from falling off. The rack and pinion bracket 5 engages with the gear bracket 6, ensuring that its movement synchronously drives the gear bracket 6 to rotate. This rotation of the gear bracket 6 then drives the transmission bracket 7 to move, which in turn drives the retraction bracket 8 to move, which in turn drives the tension spring 9 to move. The gear bracket 6 restricts the transmission bracket 7 to prevent its position from shifting during movement. Simultaneously, the guide bracket 10 guides and supports the retraction bracket 8 to ensure its position does not shift during movement. The fixing seat 1... The tension spring 9 is fixed to prevent it from shifting position during movement. This allows the tension spring 9 to increase its tension as the retractable bracket 8 moves. The movement of the retractable bracket 8 then moves the locking pin 12, closing the double doors. The retractable bracket 8 also restricts and guides the spring 11, ensuring its position doesn't shift. The retractable bracket 8 uses an elastic pin 18 to fix and automatically retract the locking pin 12. This allows the retractable bracket 8 to move the locking pin 12 vertically, automatically locking and closing the double doors. The holes in the retractable bracket 8 allow the elastic pin 18 to automatically retract the locking pin 12, preventing the locking pin 12 from jamming if one door isn't fully closed while the other is closing. When opening, if the latch 4 isn't under external force, the tension spring 9 resets, causing the locking pin 12 to retract, thus opening the double doors. This design not only adapts to different door types but also provides fast opening and closing efficiency. The use of rack and pinion gear transmission makes the lock body thinner, and also achieves the effects of low cost, short lock body, small space occupation and convenient installation.

[0020] Reference Figure 1 , Figure 3 and Figure 4 The inner wall of the fixed base 1 is fixedly connected to the outer wall of the tension spring 9, and the outer wall of the locking pin 12 is slidably connected to the inner wall slot of the shrink bracket 8. Specifically, the tension spring 9 is fixed and supported by the fixed seat 1 so that the position of the tension spring 9 will not shift. At the same time, the retractable bracket 8 restricts and guides the locking pin 12 so that the position of the locking pin 12 will not shift when it moves.

[0021] Reference Figure 1 , Figure 3 and Figure 4 The outer wall of the locking tongue 4 is slidably connected to the inner wall of the fixed base 1, and the outer wall of the locking pin 12 is slidably connected to the inner wall of the fixed base 1. Specifically, the fixing seat 1 restricts and guides the bolt 4 so that the bolt 4 will not shift its position when it moves. At the same time, the fixing seat 1 supports and guides the locking pin 12 so that the locking pin 12 will not shift its position when it moves.

[0022] Reference Figure 1 , Figure 3 and Figure 4 The outer wall of the locking pin 12 is slidably connected to the inner wall of the panel 3, and the outer wall of the spring 11 is slidably connected to the inner wall of the retractable bracket 8. Specifically, the locking pin 12 is supported and guided by the panel 3 and the fixing seat 1, so that the position of the locking pin 12 will not shift, and the retractable bracket 8 fixes the spring 11, so that the position of the spring 11 will not change.

[0023] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6 The outer wall of the guide bracket 10 is fixedly connected to the inner wall of the fixed base 1; Specifically, the guide bracket 10 is fixed by the fixing seat 1 to prevent the guide bracket 10 from falling off.

[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The outer wall of the fixed base 1 is provided with a first rivet point 13, the lower surface of the fixed base 1 is provided with a second rivet point 14, the outer wall of the fixed base 1 is provided with a welding point 15, the outer wall of the panel 3 is provided with a mounting hole 16, the outer wall of the fixed base 1 is provided with a third rivet point 17, and the inside of the locking pin 12 is provided with a spring pin 18; the retractable bracket 8 has a slot, and the outer wall of the locking pin 12 is fixedly connected to the inner wall of the spring pin 18; the slot of the retractable bracket 8 is connected to the outer wall of the locking pin 12 through the spring pin 18, and the retractable bracket 8 retracts through the slot to prevent the locking pin 12 from getting stuck when one door is not closed properly and the other door is closing. Specifically, the use of screws and rivets is reduced by setting rivet points 13, 14, and 17 on the fixing base 1, thus lowering costs and saving space. The panel 3 is fixedly connected by spot welding at welding points 15 on the fixing base 1, further reducing the use of rivets. The reduced number of rivets makes the panel 3 more aesthetically pleasing, and the better fit of the mounting holes 16 improves assembly efficiency. The elastic pin 18 assists the locking pin 12 in preventing the locking pin 12 from jamming when one door is not fully closed and the other door is attempting to close. The use of stamped steel plate offers advantages such as low cost, high strength, long service life, high efficiency, a thin and short lock body suitable for narrow installations, and a low-cost, aesthetically pleasing appearance.

[0025] Working principle: When the double doors need to be opened or closed, the movement of the latch 4 moves the rack and pinion bracket 5, which in turn rotates the gear bracket 6. The rotation of the gear bracket 6 rotates the transmission bracket 7, which in turn moves the retractable bracket 8. The tension spring 9 increases the tension as the retractable bracket 8 moves. The retractable bracket 8 moves the locking pin 12 vertically to lock the double doors. When the doors need to be opened, the latch 4 has no external force, and the tension spring 9 returns to its original position, causing the locking pin 12 to retract, thus opening the double doors. The inner wall space of the retractable bracket 8 is equipped with a spring 11, which allows the locking pin 12 to retract automatically, preventing the locking pin 12 from getting stuck when one door is not fully closed and the other door is closing. The use of rack and pinion gear transmission makes the lock body thinner, which not only achieves the effects of adapting to different door types and fast opening and closing efficiency, but also low cost, short lock body, small space occupation, and convenient installation. When the latch is fixed as a whole, the use of screws and rivets is reduced by setting the rivet points 13, 14, and 17 of the fixing base 1, which reduces costs and saves space. The welding point 15 connects the fixing base 1 to the panel 3 without rivets, making the panel 3 more aesthetically pleasing. The mounting hole 16 improves assembly efficiency. The spring 11 installed in the elastic pin 18 and the retractable bracket 8 assists the locking pin 12 in preventing the door from jamming when closing. The accessories are made by stamping, which achieves the effects of low cost, high strength, long service life, fast efficiency, thin and short lock body suitable for narrow installation, and low cost and beautiful appearance. The latch not only prevents the lock from getting stuck when one door is not fully closed and the other door is closing, but also achieves a thinner lock body by using rack and pinion gear transmission. This not only makes it compatible with different door types and provides fast opening and closing efficiency, but also results in low cost, short lock body, small footprint, and convenient installation. Furthermore, it offers the advantages of low cost, high strength, long service life, high efficiency, thin and short lock body suitable for narrow installations, and a beautiful appearance.

[0026] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 double-door automatic latch mechanism, comprising a fixed base (1), characterized in that: The outer wall of the fixed base (1) is fixedly connected to a cover plate (2), the outer wall of the fixed base (1) is fixedly connected to a panel (3), the inner wall of the panel (3) is slidably connected to a locking tongue (4), the outer wall of the locking tongue (4) is fixedly connected to a rack bracket (5), the tooth end of the rack bracket (5) is meshed with a gear bracket (6), the outer wall of the gear bracket (6) is rotatably connected to a transmission bracket (7), the outer wall of the transmission bracket (7) is rotatably connected to a retractable bracket (8), the outer wall of the retractable bracket (8) is fixedly connected to a tension spring (9), the outer wall of the retractable bracket (8) is slidably connected to a guide bracket (10), the inner wall of the retractable bracket (8) is slidably connected to a spring (11), and the outer wall of the spring (11) is fixedly connected to a locking pin (12).

2. The automatic latching mechanism for double doors according to claim 1, characterized in that: The inner wall of the fixed base (1) is fixedly connected to the outer wall of the tension spring (9), and the outer wall of the locking pin (12) is slidably connected to the inner wall slot of the shrink bracket (8).

3. The automatic latching mechanism for double doors according to claim 2, characterized in that: The outer wall of the locking tongue (4) is slidably connected to the inner wall of the fixed seat (1), and the outer wall of the locking pin (12) is slidably connected to the inner wall of the fixed seat (1).

4. The automatic latching mechanism for double doors according to claim 1, characterized in that: The outer wall of the locking pin (12) is slidably connected to the inner wall of the panel (3), and the outer wall of the spring (11) is slidably connected to the inner wall of the retractable bracket (8).

5. The automatic latching mechanism for double doors according to claim 2, characterized in that: The outer wall of the guide bracket (10) is fixedly connected to the inner wall of the fixed seat (1).

6. The automatic latching mechanism for double doors according to claim 3, characterized in that: The outer wall of the fixed base (1) is provided with a rivet point one (13), the lower surface of the fixed base (1) is provided with a rivet point two (14), the outer wall of the fixed base (1) is provided with a welding point (15), the outer wall of the panel (3) is provided with an installation hole (16), the outer wall of the fixed base (1) is provided with a rivet point three (17), and the internal of the locking pin (12) is fixedly connected with an elastic pin (18).

7. The automatic latching mechanism for double doors according to claim 6, characterized in that: The retractable bracket (8) has a hole, and the outer wall of the locking pin (12) is fixedly connected to the inner wall of the elastic pin (18).

8. The automatic latching mechanism for double doors according to claim 6, characterized in that: The slot of the retractable bracket (8) is connected to the outer wall of the locking pin (12) by an elastic pin (18). The retractable bracket (8) retracts through the slot to prevent the locking pin (12) from getting stuck when one door is not closed properly and the other door is closing.

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