A spring-loaded latch

Abstract

The utility model discloses a movable latch of automatic bolt relates to the technical field of bolt, aims at solving the problem of further improving the application scope of this prior application patent. Its technical scheme main points are: including end, connecting rod no.

Description

Technical Field

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

[0002] In the earlier patent application number 2025210479374, an automatic latch was disclosed, as shown in the attached drawings of the specification. Figure 1 As shown, the device includes a pin body, which includes a pin seat and a pin rod. The pin rod is slidably connected to the pin seat. The top of the pin seat has an opening for the pin rod to extend out. A mounting plate is fixedly connected to one side of the pin seat. The mounting plate has through holes at its upper and lower ends. A movable opening is provided on the side of the mounting plate away from the pin rod. A movable tongue is rotatably connected to the movable opening via a long fixed pin. The movable tongue and the pin rod are connected to each other through a transmission mechanism.

[0003] In the above technical solution, after the movable tongue is pushed into the bolt seat, the transmission mechanism can lift the bolt rod, so that the bolt rod is automatically inserted into the door frame to fix the child door and the mother door. During this process, people do not need to touch the bolt rod and bolt seat with their hands. They can simply open and close the door to close and separate the child door and the mother door. The child door can be locked and opened quickly. In case of emergency, the child door and the mother door can also be opened quickly at the same time. The operation is convenient.

[0004] This solution solves the problem that traditional latches require manual lifting of the latch rod and insertion into the latch seat during use, and also require a separate action of pulling out the latch rod when opening the door. To further improve the applicability of the product, this product has been improved again, and an automatic latch with a movable oblique tongue is proposed to further expand the scope of application of this prior patent application. 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 a movable oblique tongue, which further improves the applicability of the movable oblique tongue.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a movable inclined tongue of an automatic latch, comprising an end, a first connecting rod, and a second connecting rod, wherein the end is fixedly connected to the first connecting rod, and the end of the first connecting rod away from the end is rotatably connected to the second connecting rod. The end includes a connecting block and a contact head; The contact head is integrally formed on the front end of the connecting block. A first force-bearing surface is provided on the side of the contact head away from the connecting block. A first angle is formed between the first force-bearing surface and the component force in the sliding direction of the end head. The component of the force in the sliding direction of the end is in the same plane as or forms a second angle with the side of the connecting block.

[0007] The present invention is further configured such that when the component of the sliding force at the end is in the same plane as the side of the connecting block, the first included angle is an acute angle.

[0008] The present invention is further configured such that when a second included angle exists, a second force-bearing surface is provided on the contact head, and the angles of the first included angle and the second included angle are both 45° to 65°.

[0009] The present invention is further configured such that the first included angle and the second included angle are the same.

[0010] The present invention is further configured such that the middle sections of the first and second force-bearing surfaces are both recessed into the interior of the contact head, forming a continuous arc surface.

[0011] The present invention is further configured such that: the contact head is also provided with a contact surface, which is located at the end of the first force-bearing surface away from the connecting block.

[0012] The present invention is further configured such that: a limiting piece is fixedly connected to one side of the second connecting rod, the limiting piece is bent toward the side closer to the first connecting rod, and when the contact head is retracted into the automatic latch, the limiting piece abuts against the first connecting rod.

[0013] In summary, this utility model has the following beneficial effects: I. This utility model, by setting a force-bearing surface at a specific acute angle to the sliding direction on the end that contacts the main door, can efficiently decompose the impact force when closing the door into an effective component force along the sliding direction, thereby reducing movement jamming and friction wear. This not only ensures the smoothness and reliability of the movable tongue movement and extends its service life, but also reduces the direct impact on the main door by guiding the force to the sliding direction, thus ensuring the integrity of the door body.

[0014] Second, the movable latch, by adopting a symmetrical first and second force-bearing surface and a continuous arc surface, can adapt to the installation requirements of bidirectional door opening or different directions, greatly expanding the application range of the automatic latch. At the same time, the limit plate structure added to the first and second connecting rods effectively prevents the movable latch from excessively retracting, improves the overall positioning accuracy and overall operational safety and reliability, and ensures the long-term stable locking function of the automatic latch. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the automatic latch structure; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the structure of the present invention. Figure 3 ; Figure 5 This is a schematic diagram of the structure of the present invention. Figure 4 ; Figure 6 This is a schematic diagram of the structure of the present invention. Figure 5 ; Figure 7 This is a schematic diagram of the structure of the present invention. Figure 6 ; Figure 8 This is a schematic diagram of the structure of the present invention. Figure 7 .

[0016] In the diagram: 1. Link 1; 2. Link 2; 3. Connecting block; 4. Contact head; 5. First force-bearing surface; 6. First included angle; 7. Second force-bearing surface; 8. Second included angle; 9. Contact surface; 10. Limiting plate. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] A movable slant for an automatic latch, which is applied to an automatic latch, such as... Figure 1As shown, the automatic latch is usually installed on the sub-door. When the door is closed, the movable latch usually abuts against the main door, and the main door pushes the movable latch into the automatic latch to lock the sub-door.

[0021] like Figures 2-7 As shown, this embodiment is Embodiment 1. The movable latch provided includes an end head, a first connecting rod 1, and a second connecting rod 2. The end head is fixedly connected to the first connecting rod 1, and the end of the first connecting rod 1 away from the end head is rotatably connected to the second connecting rod 2. The end head includes a connecting block 3 and a contact head 4. The contact head 4 is integrally formed on the front end of the connecting block 3. A first force-bearing surface 5 is provided on the side of the contact head away from the connecting block 3. A first angle 6 is formed between the first force-bearing surface 5 and the component force in the sliding direction of the end head. By setting the first force-bearing surface 5 to form a first angle 6 with the component force in the sliding direction, when the contact head 4 contacts an external object such as a door frame, the first force-bearing surface 5 can decompose the contact force into a component force in the sliding direction and a component force perpendicular to the sliding direction, thereby reducing the jamming phenomenon of the end head during the sliding process, improving the smoothness and reliability of the movable latch, and ensuring the smooth operation of the automatic latch.

[0022] like Figures 2-4 As shown, this embodiment, as Embodiment Two, further defines the component of the sliding force of the end head and the side of the connecting block 3 as being on the same plane, and the first included angle 6 is an acute angle, based on Embodiment One. By setting the first included angle 6 as an acute angle, the first force-bearing surface 5 can more effectively guide the force to the sliding direction when subjected to external force, reducing the interference of the lateral component force on the movement of the end head, thereby reducing friction and wear, extending the service life of the movable tongue, and improving the response speed and stability of the latch. When the main door is closed, the main door contacts the first force-bearing surface 5, causing the main door to slide along the first force-bearing surface 5 and push the end head into the automatic latch. With the end head at the same height, the component of the sliding force of the end head and the side of the connecting block 3 are on the same plane, and there is only one inclined first force-bearing surface 5 on the end head, so that the first force-bearing surface 5 can have a sufficiently gentle slope, thereby reducing the impact of the end head on the main door and ensuring the service life of the main door.

[0023] like Figures 5-8As shown, this embodiment is the third embodiment. Based on the first embodiment, the component of the sliding force at the end forms a second included angle 8 with the side of the connecting block 3, and a second force-bearing surface 7 is provided on the contact head 4. The angles of the first included angle 6 and the second included angle 8 are both 45° to 65°. By setting the first force-bearing surface 5 and the second force-bearing surface 7 on the same contact head 4, the automatic bolt can be applied to doors that open in both directions or to sub-doors and main doors installed in different directions, thus improving the applicability of the automatic bolt. The first included angle 6 and the second included angle 8 are the same. By controlling the first included angle 6 and the second included angle 8 within the range of 45° to 65°, the force transmission efficiency is optimized. This avoids insufficient force decomposition due to an excessively small angle or increased sliding resistance due to an excessively large angle, thereby enhancing the adaptability and durability of the movable tongue and making it suitable for various installation environments. By making the first included angle 6 and the second included angle 8 consistent, it ensures that the contact head 4 symmetrically decomposes the force when subjected to force, avoiding off-center loading or vibration caused by angle differences. This improves the motion balance and stability of the movable tongue, reduces noise and wear, and makes the automatic latch work more smoothly and reliably.

[0024] like Figures 2-8 As shown, this embodiment, as Embodiment Four, further defines, based on Embodiment Two or Embodiment Three, that the middle sections of both the first force-bearing surface 5 and the second force-bearing surface 7 are recessed into the contact head 4, forming a continuous arc surface. By designing the force-bearing surface as a recessed arc surface, the contact area between the contact head 4 and the external object is increased, local stress is dispersed, and the arc surface structure can guide the smooth transition of external forces, reducing impact and wear, thereby further improving the wear resistance and impact resistance of the movable tongue and extending its service life.

[0025] This embodiment, as embodiment five, further provides a contact surface 9 on the contact head 4 based on embodiment one. The contact surface 9 is located at the end of the first force-bearing surface 5 away from the connecting block 3. By providing the contact surface 9, an additional force-bearing point is provided for the contact head 4. When the first force-bearing surface 5 comes into contact with an external object, the contact surface 9 can help bear the subsequent force, preventing excessive intrusion or jamming of the end, thereby enhancing the overall structural strength and operational reliability of the movable tongue and ensuring that the automatic latch maintains its performance during repeated use.

[0026] like Figures 7-8As shown, this embodiment, as embodiment six, further adds a limiting piece 10 to one side of the connecting rod 2, based on embodiment one. The limiting piece 10 bends towards the side closer to the connecting rod 1. When the contact head 4 retracts into the automatic latch, the limiting piece 10 abuts against the connecting rod 1. By setting the limiting piece 10, the relative movement range of the connecting rod 1 and the connecting rod 2 is limited, preventing the contact head 4 from retracting excessively and completely entering the automatic latch, and preventing the contact head 4 from getting stuck in the automatic latch. This improves the safety and positioning accuracy of the movable tongue, avoids malfunctions caused by loosening, and ensures that the automatic latch is always in the preset position during the closing and opening process.

[0027] The structural principle of this utility model: The end includes a connecting block 3 and an integrally formed contact head 4. The contact head 4 is provided with one or more first force-bearing surfaces 5 and second force-bearing surfaces 7 that are at acute angles to the sliding direction. When the door is closed, the main door acts on these inclined force-bearing surfaces, and the resulting reaction force can be effectively decomposed into a squeezing force perpendicular to the force-bearing surface and a component force along the sliding direction of the tongue. This component force directly pushes the entire end together with the connecting rod 1 to move backward, and through the rotation connection of the connecting rod 2, the movable tongue can be smoothly retracted into the housing of the automatic latch. The middle section of the first force-bearing surface 5 and the second force-bearing surface 7 can be designed as an inwardly concave continuous arc surface to increase the contact area, disperse stress and reduce impact wear. At the same time, the limiting piece 10 provided on the connecting rod 2 can abut against the connecting rod 1 when the tongue is fully retracted to prevent excessive retraction and ensure the accuracy and reliability of the movement stroke.

[0028] 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. A movable inclined tongue of an automatic latch, comprising an end, a first connecting rod (1) and a second connecting rod (2), wherein the end is fixedly connected to the first connecting rod (1), and the end of the first connecting rod (1) away from the end is rotatably connected to the second connecting rod (2), characterized in that: The end includes a connecting block (3) and a contact head (4); The contact head (4) is integrally formed on the front end of the connecting block (3). A first force-bearing surface (5) is provided on the side of the contact head (4) away from the connecting block (3). A first included angle (6) is formed between the first force-bearing surface (5) and the component force in the sliding direction of the end. The component of the sliding force at the end is in the same plane as the side of the connecting block (3) or forms a second included angle (8).

2. The movable oblique tongue of an automatic latch according to claim 1, characterized in that: When the component of the sliding force at the end is in the same plane as the side of the connecting block (3), the first included angle (6) is an acute angle.

3. The movable oblique tongue of an automatic latch according to claim 1, characterized in that: When a second included angle (8) exists, a second force-bearing surface (7) is provided on the contact head (4), and the angles of the first included angle (6) and the second included angle (8) are both 45° to 65°.

4. The movable oblique tongue of an automatic latch according to claim 3, characterized in that: The first included angle (6) and the second included angle (8) are the same.

5. The movable oblique tongue of an automatic latch according to claim 2 or 3, characterized in that: The middle sections of the first force-bearing surface (5) and the second force-bearing surface (7) are both recessed into the interior of the contact head (4) to form a continuous arc surface.

6. The movable oblique tongue of an automatic latch according to claim 1, characterized in that: The contact head (4) is also provided with a contact surface (9), which is located at the end of the first force-bearing surface (5) away from the connecting block (3).

7. The movable oblique tongue of an automatic latch according to claim 1, characterized in that: A limiting piece (10) is fixedly connected to one side of the second link (2). The limiting piece (10) bends toward the side closer to the first link (1). When the contact head (4) is retracted into the automatic latch, the limiting piece (10) abuts against the first link (1).

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