A civil air defense door locking device

Abstract

The utility model provides a civil air defence door locking device, including the fixed sleeve of setting in the door handle pivot and the locking mechanism of setting in the door leaf, fixed sleeve and door handle pivot synchronous linkage, locking mechanism includes the mounting ring of fixed setting in the door leaf and the locking shaft of sliding setting in the mounting ring, the side wall of fixed sleeve is equipped with the locking groove that locking shaft slides and extends into, slidingly be provided with the moving link of being used for driving locking shaft to remove or remove locking groove in the door leaf, the end of locking shaft is provided with the wedge locking head, the locking groove inner wall is provided with the wedge recess that cooperates with wedge locking head, be provided with the elastic reset mechanism in the mounting ring, and the spring seat of fixed in the mounting ring inner wall and reset spring of abut with locking shaft are included, be provided with the limit boss on the moving link, and this limit boss forms the limit cooperation with the door leaf inner wall, the outside of mounting ring is provided with the indicating ring, and this indicating ring is through the connecting rod and is linked with locking shaft.

Description

Technical Field

[0001] This utility model relates to the field of civil defense equipment technology, and in particular to a civil defense door locking device. Background Technology

[0002] As a crucial component of protective engineering, the locking device of a civil defense door plays a key role in ensuring the door's security and sealing. Traditional locking devices typically use mechanical structures to fix the door handle to the door leaf, but in practical use, they often face problems such as insufficient locking reliability and difficulty in identifying the operational status. On the one hand, the locking structure is prone to loosening after external impact or prolonged use, resulting in the door not being able to lock effectively and posing a safety hazard. On the other hand, the status indication of the locking device is not intuitive enough, making it difficult for operators to quickly determine whether the door is locked or unlocked, increasing the risk of operational errors. These problems directly affect the protective effectiveness and ease of use of civil defense doors, urgently requiring a technical solution that can improve locking stability and status identification. By optimizing the design of the locking structure and improving the status indication function, the above contradictions can be effectively resolved, providing a guarantee for the safe use of civil defense doors. In this context, the research and improvement of related technologies are particularly important, aiming to overcome the shortcomings of existing devices through innovative design, improve overall performance, and meet the higher requirements of modern protective engineering for safety and reliability.

[0003] Therefore, it is necessary to study a locking device for air defense doors to address the shortcomings of existing technologies and to solve or mitigate one or more of the aforementioned problems. Utility Model Content

[0004] In view of this, the present invention provides a locking device for air defense doors, which significantly improves the reliability of air defense door locking and the intuitiveness of operation through the combination of structural optimization and status indication, thus providing effective protection for safety.

[0005] On the one hand, this utility model provides a locking device for a civil defense door, including a fixed sleeve disposed on the door handle shaft and a locking mechanism disposed on the door leaf. The fixed sleeve is synchronously linked with the door handle shaft. The locking mechanism includes an installation ring fixedly disposed in the door leaf and a locking shaft slidably disposed in the installation ring. A locking groove is provided on the side wall of the fixed sleeve for the locking shaft to slide into. A moving rod for driving the locking shaft to move into or out of the locking groove is slidably disposed in the door leaf. The end of the locking shaft is provided with a wedge-shaped locking head, the inner wall of the locking groove is provided with a wedge-shaped groove that cooperates with the wedge-shaped locking head, and the mounting ring is provided with an elastic reset mechanism, which includes a spring seat fixed to the inner wall of the mounting ring and a reset spring that abuts against the locking shaft. The movable rod is provided with a limiting boss, which forms a limiting fit with the inner wall of the door leaf. An indicator ring is provided on the outside of the mounting ring, which is linked to the locking shaft through a connecting rod.

[0006] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the wedge angle of the wedge locking head is 15 to 45 degrees, the depth of the wedge groove is greater than the wedge height of the wedge locking head, and the wedge locking head and the wedge groove cooperate to form a self-locking structure.

[0007] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the return spring is a compression spring with a pre-compression amount of one-third of the travel of the locking shaft, the spring seat is fixed to the inner wall of the mounting ring by a threaded connection, and the other end of the return spring abuts against the rear end face of the locking shaft through a spring washer. When the moving rod does not apply a thrust, the return spring drives the locking shaft to retract to the initial position.

[0008] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the movable rod has a segmented structure, including a front rod body and a rear rod body, the front rod body and the rear rod body are connected by a connecting sleeve, a sealing ring is provided inside the connecting sleeve, and the limiting boss is provided on the front rod body, the limiting boss is an annular structure and is integrally formed with the front rod body.

[0009] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the locking groove has a stepped structure, including a shallow groove section and a deep groove section, wherein the shallow groove section is used for the initial positioning of the locking shaft and the deep groove section is used for the final locking of the wedge-shaped locking head.

[0010] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the indicator ring is provided with a red locking area and a green unlocking area, the connecting rod passes through the indicator hole of the mounting ring and is connected to the indicator ring, the indicator ring displays the red locking area when the locking shaft extends into the locking groove, and the indicator ring displays the green unlocking area when the locking shaft exits the locking groove, the outer surface of the indicator ring is provided with an anti-slip texture to facilitate observation of the locking status, the connecting rod is made of stainless steel and the surface is treated with anti-corrosion, and a sealing gasket is provided in the indicator hole to prevent dust from entering the interior of the mounting ring.

[0011] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the spring washer is made of metal and its diameter is larger than the outer diameter of the return spring, and the spring washer is connected to the locking shaft via a slot.

[0012] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the inner wall of the connecting sleeve is provided with an internal thread, and the connecting ends of the front section rod and the rear section rod are both provided with external threads.

[0013] In addition to the aspects described above and any possible implementation, a further implementation is provided in which the depth of the shallow groove section is half the thickness of the wedge-shaped locking head, and the depth of the deep groove section is 1-2 times the thickness of the wedge-shaped locking head.

[0014] In addition to the aspects and any possible implementations described above, a further implementation is provided in which the shallow groove section and the deep groove section are connected by a transition slope, the inclination angle of the transition slope matching the wedge angle of the wedge locking head, ensuring that the wedge locking head can smoothly slide from the shallow groove section into the deep groove section and achieve reliable locking, and the total length of the stepped locking groove is 1.5 times the maximum stroke of the locking shaft.

[0015] Compared with the prior art, the present invention can achieve the following technical effects: This utility model discloses a locking device for air-raid shelter doors. Through innovative design, it solves the problems of insufficient reliability and difficulty in identifying the operational status of traditional air-raid shelter door locking structures. The device utilizes a fixed sleeve that is synchronously linked with the door handle shaft and a locking mechanism within the door leaf. It achieves reliable locking by using a wedge-shaped locking head at the end of the locking shaft and a wedge-shaped groove in the locking slot for self-locking. Simultaneously, the stepped locking groove design ensures a smooth transition between initial positioning and final locking. An elastic reset mechanism ensures that the locking shaft automatically returns to its original position when no external force is applied, enhancing operational convenience. Furthermore, an indicator ring visually displays the locking and unlocking status through different colored areas, and combined with anti-slip textures and a sealing design, it improves safety and durability.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a civil defense door locking device provided in one embodiment of the present invention; Figure 2 This is a cross-sectional view of a locking mechanism for a civil defense door provided in one embodiment of the present invention; Figure 3This is a partially enlarged view of the movable rod of a civil defense door provided in one embodiment of this utility model; Figure 4 This is a schematic diagram of the operation of the locking groove of a civil defense door provided in one embodiment of the present invention; Figure 5 This is an exploded view of the indicator ring of a civil defense door provided in one embodiment of this utility model. Detailed Implementation

[0019] To better understand the technical solution of this utility model, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” as used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] This utility model provides a locking device for a civil defense door with wedge locking and elastic reset functions. For ease of description, the terminology used in this specification is based on the placement posture of the civil defense door locking device in normal use. Figure 1 As shown, the inside of the door leaf faces the interior, the door handle pivot is set horizontally, and the locking pivot slides along the thickness of the door leaf.

[0023] Reference Figure 1 This utility model provides a locking device for a fire-fighting door with wedge locking and elastic reset functions. It includes a fixed sleeve 1 mounted on the door handle shaft and a locking mechanism mounted on the door leaf. The fixed sleeve 1 and the door handle shaft are connected by a keyway for synchronous linkage. The locking mechanism includes a mounting ring 3 fixedly mounted in the door leaf and a locking shaft 4 slidably mounted in the mounting ring 3. A locking groove 5 is provided on the side wall of the fixed sleeve 1 for the locking shaft 4 to slide into. A moving rod 7 is slidably mounted in the door leaf to drive the locking shaft 4 into or out of the locking groove 5. This integrated structure ensures that the door leaf is not easily opened accidentally when locked, and reliable mechanical locking is achieved through the cooperation of the locking shaft 4 and the locking groove 5.

[0024] like Figure 1As shown, the locking shaft 4 has a wedge-shaped locking head 11 at its end, and the inner wall of the locking groove 5 has a wedge-shaped groove that mates with the wedge-shaped locking head 11. The mounting ring 3 has an elastic reset mechanism, which includes a spring seat fixed to the inner wall of the mounting ring 3 and a reset spring that abuts against the locking shaft 4. The moving rod 7 has a limiting boss 8, which forms a limiting fit with the inner wall of the door leaf. The outer side of the mounting ring 3 has an indicator ring 9, which is linked to the locking shaft 4 via a connecting rod. This design allows the locking shaft 4 to form a wedge-shaped self-lock when it enters the locking groove 5, improving locking stability. Simultaneously, the elastic reset mechanism ensures automatic return to its original position, the limiting boss 8 prevents excessive movement, and the indicator ring 9 provides intuitive status feedback.

[0025] Reference Figure 2 The figure shows a cross-sectional view of the locking mechanism. The wedge angle of the wedge-shaped locking head 11 is between 15 and 45 degrees, for example, 30 degrees can be selected to balance the insertion force and locking strength. The depth of the wedge groove is greater than the wedge height of the wedge-shaped locking head 11, for example, the groove depth is 1 to 2 times the height of the locking head, ensuring full embedding. When the wedge-shaped locking head 11 and the wedge groove cooperate, they form a self-locking structure, preventing accidental disengagement through the friction of the wedge surface. The return spring is a compression spring, and its pre-compression is one-third of the stroke of the locking shaft 4. For example, when the stroke is 20 mm, the pre-compression is about 6.67 mm. The spring seat is fixed to the inner wall of the mounting ring 3 by a threaded connection. The other end of the return spring abuts against the rear end face of the locking shaft 4 through a spring washer. This structure allows the return spring to drive the locking shaft 4 back to the initial position when the moving rod 7 does not apply a pushing force, thereby realizing the elastic reset function and effectively preventing the door from opening under non-intentional operation.

[0026] like Figure 2 As shown, the spring washer is made of metal, and its diameter is larger than the outer diameter of the return spring. For example, the washer diameter is 1.5 times the outer diameter of the return spring to provide a stable support surface. The spring washer is connected to the locking shaft 4 via a slot, for example, an annular slot is opened at the rear end of the locking shaft 4, and the washer is embedded therein for fixation. This connection method ensures that the force of the return spring is evenly applied to the locking shaft 4, improving the durability and reliability of the return mechanism. At the same time, the choice of metal material enhances corrosion resistance and is suitable for the humid environment of the air-raid shelter door.

[0027] Reference Figure 3This figure is a partially enlarged view of the movable rod 7. The movable rod 7 has a segmented structure, including a front rod body and a rear rod body, which are connected by a connecting sleeve 10. A sealing ring is provided inside the connecting sleeve 10. A limiting boss 8 is provided on the front rod body. The limiting boss 8 has a ring structure and is integrally formed with the front rod body. The inner wall of the connecting sleeve 10 is provided with internal threads, and the connecting ends of the front and rear rod bodies are provided with external threads. This segmented design facilitates installation and maintenance. For example, when the door leaf is thick, the rod length can be adjusted. The sealing ring prevents dust or moisture from entering the connection part. The limiting boss 8 and the limiting engagement with the inner wall of the door leaf limit the maximum stroke of the movable rod 7, avoiding excessive pushing of the locking shaft 4, thereby improving the overall safety of the device.

[0028] like Figure 3 As shown, the annular structure of the limiting boss 8 is integrally formed on the front section of the rod body, for example, by turning. Its outer diameter is slightly larger than the inner diameter of the sliding hole in the door leaf, thus creating a stopping effect. This integral forming method reduces connection points and lowers the risk of failure. At the same time, during operation, when the moving rod 7 pushes the locking shaft 4, the limiting boss 8 ensures that the locking shaft 4 moves precisely into the locking groove 5, preventing overload damage to the wedge-shaped locking head 11.

[0029] Reference Figure 4 This diagram illustrates the operation of the locking groove 5. The locking groove 5 has a stepped structure, including a shallow groove section and a deep groove section. The shallow groove section is used for the initial positioning of the locking shaft 4, and the deep groove section is used for the final locking of the wedge-shaped locking head 11. The depth of the shallow groove section is half the thickness of the wedge-shaped locking head 11; for example, when the locking head thickness is 10 mm, the shallow groove depth is 5 mm. The depth of the deep groove section is 1 to 2 times the thickness of the wedge-shaped locking head 11, i.e., 12 mm. The shallow and deep groove sections are connected by a transition slope. The inclination angle of the transition slope matches the wedge angle of the wedge-shaped locking head 11, for example, both are 30 degrees, ensuring that the wedge-shaped locking head 11 can smoothly slide from the shallow groove section into the deep groove section and achieve reliable locking. The total length of the stepped locking groove 5 is 1.5 times the maximum stroke of the locking shaft 4; for example, when the stroke is 20 mm, the total length is 30 mm. This stepped design achieves progressive locking. Initial positioning reduces insertion resistance, while final locking enhances the self-locking effect, effectively preventing the door from being accidentally opened under vibration or impact.

[0030] like Figure 4 As shown, during operation, when the operating lever 7 pushes the locking shaft 4, the wedge-shaped locking head 11 first enters the shallow groove section for initial alignment, and then slides along the transition slope into the deep groove section to form a self-locking mechanism. When the thrust is released, the return spring drives the locking shaft 4 to retract and exit the locking groove 5. This mechanism ensures smooth locking and unlocking, while the stepped structure improves shear strength, making it suitable for emergency scenarios in air defense doors.

[0031] Reference Figure 5 This figure shows an exploded view of the indicator ring 9. The indicator ring 9 has different colored indicator areas, including a red locking area and a green unlocking area. The connecting rod passes through the indicator hole of the mounting ring 3 and connects to the indicator ring 9. When the locking shaft 4 extends into the locking groove 5, the indicator ring 9 displays the red locking area; when the locking shaft 4 exits the locking groove 5, the indicator ring 9 displays the green unlocking area. The outer surface of the indicator ring 9 has an anti-slip texture for easy observation of the locking status. The connecting rod is made of stainless steel and its surface is treated with anti-corrosion coating. A sealing gasket is installed inside the indicator hole to prevent dust from entering the mounting ring 3. This indicator ring 9 is linked to the locking shaft 4 via the connecting rod to achieve synchronous display. For example, one end of the connecting rod is welded to the side wall of the locking shaft 4, and the other end is engaged with the inner groove of the indicator ring 9, providing intuitive visual feedback and improving the operator's identification efficiency. The anti-slip texture and sealing gasket enhance durability and protection.

[0032] like Figure 5 As shown, the indicator ring 9 is installed on the outside of the mounting ring 3, for example, through a rotatable connection via a bearing, facilitating rotation to display different areas. This linkage design ensures the accuracy of status indication; for example, in the locked state, the red area aligns with the observation window, reminding the door that it is locked, thereby reducing the risk of misoperation and benefiting the overall security management of the air-raid shelter door.

[0033] In this embodiment, the working principle of the entire device is as follows: In the initial state, the return spring keeps the locking shaft 4 in the retracted position, and the indicator ring 9 displays the green unlocked area; when locking is required, the moving rod 7 is pushed, the limiting boss 8 restricts the travel, driving the locking shaft 4 forward, and the wedge-shaped locking head 11 enters the shallow groove section of the locking groove 5 for initial positioning, and then slides into the deep groove section for self-locking, while the indicator ring 9 rotates to display the red locking area; when unlocking, the moving rod 7 is released, the return spring drives the locking shaft 4 to retract, and the indicator ring 9 switches to green. This cooperation realizes the functions of wedge locking and elastic reset, making the door less likely to be opened accidentally, improving reliability and convenience.

[0034] As an alternative, the return spring can be replaced by a torsion spring mounted on the side wall of the locking shaft 4 to provide lateral return force, but the linear action of a compression spring is more suitable for the sliding structure of this device; in addition, the wedge angle can be adjusted to 15 degrees to adapt to a low-friction environment, or 45 degrees to enhance the self-locking force. These variations all support the technical solution of the claims and achieve similar effects.

[0035] The above provides a detailed description of a civil defense door locking device provided in the embodiments of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application; furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

[0036] Certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The terms "comprising" and "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising / including but not limited to". "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error. The following descriptions in the specification are preferred embodiments for carrying out this application; however, these descriptions are for the purpose of illustrating the general principles of this application and are not intended to limit the scope of this application. The scope of protection of this application shall be determined by the appended claims.

[0037] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0038] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0039] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A locking device for a civil defense door, comprising a fixed sleeve disposed on a door handle pivot and a locking mechanism disposed on a door leaf, wherein the fixed sleeve is synchronously linked with the door handle pivot, the locking mechanism comprises a mounting ring fixedly disposed in the door leaf and a locking shaft slidably disposed in the mounting ring, a locking groove is provided on the side wall of the fixed sleeve for the locking shaft to slide into, and a moving rod is slidably disposed in the door leaf for driving the locking shaft to move into or out of the locking groove, characterized in that: The end of the locking shaft is provided with a wedge-shaped locking head, the inner wall of the locking groove is provided with a wedge-shaped groove that cooperates with the wedge-shaped locking head, and the mounting ring is provided with an elastic reset mechanism, which includes a spring seat fixed to the inner wall of the mounting ring and a reset spring that abuts against the locking shaft. The movable rod is provided with a limiting boss, which forms a limiting fit with the inner wall of the door leaf. An indicator ring is provided on the outside of the mounting ring, which is linked to the locking shaft through a connecting rod.

2. The air-raid shelter door locking device according to claim 1, characterized in that: The wedge angle of the wedge locking head is 15 to 45 degrees, the depth of the wedge groove is greater than the wedge height of the wedge locking head, and the wedge locking head and the wedge groove cooperate to form a self-locking structure.

3. The air-raid shelter door locking device according to claim 1, characterized in that: The return spring is a compression spring with a pre-compression amount of one-third of the lock shaft stroke. The spring seat is fixed to the inner wall of the mounting ring by a threaded connection. The other end of the return spring abuts against the rear end face of the lock shaft through a spring washer. When the moving rod does not apply a thrust, the return spring drives the lock shaft to retract to the initial position.

4. The air-raid shelter door locking device according to claim 1, characterized in that: The movable rod has a segmented structure, including a front rod body and a rear rod body. The front rod body and the rear rod body are connected by a connecting sleeve. A sealing ring is provided inside the connecting sleeve. The limiting boss is provided on the front rod body. The limiting boss has a ring structure and is integrally formed with the front rod body.

5. A locking device for a civil defense door according to claim 1, characterized in that: The locking groove has a stepped structure, including a shallow groove section and a deep groove section. The shallow groove section is used for the initial positioning of the locking shaft, and the deep groove section is used for the final locking of the wedge-shaped locking head.

6. A locking device for a civil defense door according to claim 1, characterized in that: The indicator ring has a red locking area and a green unlocking area. The connecting rod passes through the indicator hole of the mounting ring and connects to the indicator ring. When the locking shaft extends into the locking groove, the indicator ring displays the red locking area. When the locking shaft exits the locking groove, the indicator ring displays the green unlocking area. The outer surface of the indicator ring has an anti-slip texture. The connecting rod is made of stainless steel and its surface is treated with anti-corrosion. A sealing gasket is provided in the indicator hole to prevent dust from entering the interior of the mounting ring.

7. A locking device for a civil defense door according to claim 3, characterized in that: The spring washer is made of metal and its diameter is larger than the outer diameter of the return spring. The spring washer is connected to the locking shaft through a slot.

8. A locking device for a civil defense door according to claim 4, characterized in that: The inner wall of the connecting sleeve is provided with internal threads, and the connecting ends of the front section and the rear section are both provided with external threads.

9. A locking device for a civil defense door according to claim 5, characterized in that: The shallow groove section has a depth of half the thickness of the wedge-shaped locking head, and the deep groove section has a depth of 1-2 times the thickness of the wedge-shaped locking head.

10. A locking device for a civil defense door according to claim 9, characterized in that: The shallow groove section and the deep groove section are connected by a transition slope. The inclination angle of the transition slope matches the wedge angle of the wedge locking head. The total length of the locking groove of the stepped structure is 1.5 times the maximum stroke of the locking shaft.

Images