Pivot latch

Abstract

The application provides a quick opening door lock for a cruise ship, and relates to the technical field of cruise ship door locks. The quick opening door lock comprises a door lock body and a locking assembly. The door lock body is fixedly connected to a mounting portion, and the door lock body is provided with a storage cavity penetrating through the door lock body along the Z direction. The locking assembly comprises a locking tongue, a connecting piece, a buckle and a reset piece. The connecting piece is rotatably arranged at the upper end of the storage cavity, the locking tongue is movably arranged at the lower end of the storage cavity, the locking portion of the locking tongue is exposed below the storage cavity, the locking tongue is drivingly connected to the connecting piece, the reset piece is arranged between the locking tongue and the inner wall of the storage cavity, the buckle is arranged opposite to the locking portion, the locking portion has a locking state and an open state, and the locking portion is locked with the buckle when the locking portion is in the locking state. The connecting piece is moved towards the buckle to convert the locking portion from the locking state to the open state. The lock guarantees the locking effect, and is simple in structure and capable of achieving quick opening, thereby improving the convenience of opening and closing the lock.

Description

Technical Field

[0001] This invention relates to the field of cruise ship inspection door technology, and in particular to a quick-opening door lock for inspection doors. Background Technology

[0002] Cruise ship access doors typically have two opening methods: quick-opening and locking. Quick-opening uses a rotary lock, which can be opened by rotating clockwise or counterclockwise. Because there's no fixed opening direction, the locking effect is not ideal. While using a regular lock ensures a secure lock, it doesn't allow for quick opening, making opening and closing inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a quick-opening door lock for maintenance doors. This quick-opening door lock ensures the locking effect while improving the convenience of opening and closing the door due to its simple structure and quick opening capability.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Inspection door quick-opening locks, used on cruise ships, including:

[0006] The door lock body is fixedly connected to the mounting part on the inspection door of the cruise ship, and the door lock body is provided with a storage cavity through the door lock body along the Z direction;

[0007] The locking assembly includes a latch, a connector, a latch, and a reset member. The connector is rotatably disposed at the upper end of the storage cavity, the latch is movably disposed at the lower end of the storage cavity, the locking part of the latch is exposed below the storage cavity, and the latch is throttle connected to the connector. The reset member is disposed between the latch and the inner wall of the storage cavity. The latch is disposed opposite to the locking part and is disposed on the wall of the cruise ship corresponding to the mounting part. The locking part has a locked state and an open state. When the locking part is in the locked state, the locking part is locked with the latch.

[0008] Move the connector toward the buckle to change the locking part from the locked state to the open state.

[0009] As a further technical solution, the locking component also includes an auxiliary plate, and the connector includes a first connecting part and a second connecting part;

[0010] The auxiliary plate is located inside the storage cavity and is disposed between the latch and the connector. The auxiliary plate is provided with a through hole. The first end of the first connecting part is vertically fixedly connected to the first end of the second connecting part. The second end of the second connecting part passes through the through hole and is connected to the latch. When the locking part is in the locked state, the abutting surface on the first connecting part abuts against the auxiliary plate.

[0011] As a further technical solution, an auxiliary abutment block is provided on the upper surface of the auxiliary plate, and when the locking part is in the locked state, the abutment surface abuts against the auxiliary abutment block.

[0012] As a further technical solution, a gripping hole is provided at the second end of the first connecting part so that the first connecting part forms a pull ring.

[0013] As a further technical solution, the sidewall of the gripping hole is inclined towards the center of the gripping hole in a direction away from the contact surface.

[0014] As a further technical solution, the locking tongue is provided with a sliding groove that extends along the Z direction, and the second end of the second connecting part is slidably constrained to the sliding groove.

[0015] As a further technical solution, the locking part is provided with a locking surface, and the locking surface is inclined towards the connector in the direction from the buckle to the locking part.

[0016] As a further technical solution, a locking auxiliary component is movably provided on the locking surface. When the locking part is in the locked state, the locking auxiliary component can prevent the locking part from disengaging from the buckle.

[0017] As a further technical solution, the reset member is configured as a compression spring, and the locking assembly further includes a guide cylinder fixedly disposed in the storage cavity. The guide cylinder extends along the extension and retraction direction of the compression spring and is sleeved on the compression spring.

[0018] As a further technical solution, the quick-opening door lock for the maintenance door also includes a connecting plate with a connecting through hole. When the door lock body is fixedly connected to the mounting part, the connecting plate is fixedly connected to the door lock body through the connecting through hole.

[0019] Compared with the prior art, the quick-opening door lock for maintenance doors provided by this invention has the following technical advantages:

[0020] Because the locking part of the latch is exposed at the lower end of the storage cavity, and the latch is driven by the connecting member, the reset member is located between the latch and the inner wall of the storage cavity. The latch and the locking part are opposite each other. When the locking part is in the locked state, the locking part and the latch are locked together. Therefore, when unlocking is required, the connecting member is moved towards the latch, causing the connecting member to rotate, which drives the latch to move away from the latch, thereby unlocking. During the process of the latch moving away from the latch, the reset member is deformed by force. After the connecting member is moved until the latch disengages from the latch, and the locking part changes from the locked state to the open state, the connecting member is no longer moved. At this time, the reset member is no longer under force and begins to spring back on its own, thereby driving the latch and the connecting member back to their original state, so as to facilitate the next locking. The quick-opening door lock for maintenance doors consists only of the door lock body and locking components. Its simple structure allows for quick opening by moving the connecting piece, thus improving the convenience of opening and closing the lock. At the same time, the lock can only be switched from the locked state to the open state by moving the connecting piece in a specific direction, which can prevent the door lock from being opened by forces other than human intervention, thereby ensuring the locking effect. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the quick-opening door lock of the maintenance door in the locked state according to an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of the quick-opening door lock of the maintenance door in the open state according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0025] Figure 4 This is an exploded view of the quick-opening door lock for the maintenance door provided in an embodiment of the present invention.

[0026] In the picture:

[0027] 10. Walls;

[0028] 100. Door lock body;

[0029] 200. Locking assembly; 210. Locking tongue; 211. Locking part; 2111. Locking surface; 2112. Locking auxiliary part; 2213. Auxiliary spring; 2214. Auxiliary groove; 220. Connector; 221. First connecting part; 2211. Abutting surface; 2212. Grip hole; 222. Second connecting part; 230. Buckle; 240. Reset part; 250. Auxiliary plate; 251. Auxiliary abutting block;

[0030] 300, connecting plate; 310, connecting through hole. Detailed Implementation

[0031] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0032] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0034] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0035] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0036] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0037] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0038] Combination Figures 1 to 4As shown, the quick-opening door lock for maintenance doors (hereinafter referred to as the door lock) provided in this embodiment is applied to cruise ships. Using this door lock can ensure the locking effect. At the same time, due to its simple structure and quick-opening capability, it can improve the convenience of opening and closing the lock. Specifically, the door lock includes a door lock body 100 and a locking component 200: the door lock body 100 is fixedly connected to the mounting part, and the door lock body 100 has a storage cavity extending through the door lock body 100 along the Z direction; the locking component 200 includes a latch 210, a connector 220, a latch 230, and a reset component 240. The connector 220 is rotatably disposed at the upper end of the storage cavity, and the latch 210 is movably disposed at the lower end of the storage cavity. The locking part 211 of the latch 210 is exposed at the lower end of the storage cavity, and the latch... 210 is connected to the connecting member 220. The reset member 240 is disposed between the locking tongue 210 and the inner wall of the storage cavity. The buckle 230 is disposed opposite to the locking part 211 and is disposed on the wall 10 of the cruise ship corresponding to the mounting part. The locking part 211 has a locked state and an open state. When the locking part 211 is in the locked state, the locking part 211 is locked with the buckle 230. The connecting member 220 is moved toward the buckle 230 so that the locking part 211 changes from the locked state to the open state.

[0039] Since the locking part 211 of the latch 210 is exposed at the lower end of the storage cavity, and the latch 210 is connected to the connector 220, the reset member 240 is disposed between the latch 210 and the inner wall of the storage cavity, and the latch 230 is disposed opposite to the locking part 211, when the locking part 211 is in the locked state, the locking part 211 and the latch 230 are locked together. Therefore, when it is necessary to unlock, the connector 220 is moved towards the latch 230, causing the connector 220 to rotate, thereby driving the latch 210 to move away from the latch 230, thus unlocking; during the process of the latch 210 moving away from the latch 230, the reset member 240 is deformed by force. When the connecting member 220 is moved until the bolt 210 disengages from the latch 230, causing the locking part 211 to change from the locked state to the open state, the connecting member 220 is no longer moved. At this point, the reset member 240 is no longer under force and begins to spring back autonomously, thereby causing the bolt 210 and the connecting member 220 to return to their original state, facilitating the next locking. The door lock consists only of the door lock body 100 and the locking assembly 200, with a simple structure. Throughout the process, quick opening can be achieved by moving the connecting member 220, thus improving the convenience of locking and unlocking. At the same time, the lock can only be changed from the locked state to the open state by moving the connecting member 220 in a specific direction, which can prevent the door lock from being opened by forces other than human intervention, thereby ensuring the locking effect.

[0040] Preferably, the locking assembly 200 further includes an auxiliary plate 250, and the connector 220 includes a first connecting portion 221 and a second connecting portion 222. The auxiliary plate 250 is located in the storage cavity and is disposed between the locking tongue 210 and the connector 220. The auxiliary plate 250 is provided with a through hole. The first end of the first connecting portion 221 is vertically fixedly connected to the first end of the second connecting portion 222. The second end of the second connecting portion 222 passes through the through hole and is connected to the locking tongue 210 in a transmission manner. When the locking portion 211 is in the locked state, the abutting surface 2211 on the first connecting portion 221 abuts against the auxiliary plate 250.

[0041] Combination Figures 1 to 4 As shown, in this embodiment, the connector 220 is configured as an L-shaped part. The connection between the first connecting part 221 and the second connecting part 222 is rotatably disposed in the storage cavity via a connecting shaft. When the locking part 211 is locked with the buckle 230, the first connecting part 221 is located in the storage cavity. Therefore, when unlocking is required, the operator needs to insert their finger into the storage cavity to pull the first connecting part 221 around the connecting shaft towards the buckle 230, thereby causing the locking tongue 210 to move away from the buckle 230, so that the locking tongue 210 disengages from the buckle 230. Throughout the process, the situation where the locking part 211 disengages from the buckle 230 due to accidental contact with the first connecting part 221 can be avoided, thereby further improving the locking effect. The connecting shaft is positioned above the auxiliary plate 250, corresponding to the through hole. This ensures the rotation effect of the connector 220. The auxiliary plate 250, positioned between the locking tongue 210 and the connector 220, can limit the rotation angle of the connector 220. When the locking part 211 is locked with the buckle 230, the abutting surface 2211 on the first connecting part 221 abuts against the auxiliary plate 250, thereby preventing the locking tongue 210 from locking with the buckle 230 due to excessive rotation of the connector 220.

[0042] Preferably, the upper end surface of the auxiliary plate 250 is provided with an auxiliary abutment block 251, and when the locking part 211 is in the locked state, the abutment surface 2211 abuts against the auxiliary abutment block 251.

[0043] Specific combination Figure 1 and Figure 2 As shown, by setting the auxiliary clamping block 251, on the one hand, the rotation angle of the connector 220 is limited to avoid the locking tongue 210 and the buckle 230 from locking together; on the other hand, a clearance is ensured between the first connecting part 221 and the auxiliary plate 250 to prevent the abutting surface 2211 from directly contacting the upper surface of the auxiliary plate 250, thereby improving the convenience of pulling the first connecting part 221.

[0044] To further improve the convenience of pulling the first connecting part 221, in this embodiment, a gripping hole 2212 is provided at the second end of the first connecting part 221 so that the first connecting part 221 forms a pull ring. When unlocking is required, the operator can insert their finger into the pull ring to pull the first connecting part 221, thereby improving the pulling effect and ease of pulling.

[0045] Furthermore, along the direction away from the contact surface 2211, the sidewall of the gripping hole 2212 is inclined towards the center of the gripping hole 2212. The inclined sidewall improves the ease with which the operator can reach into the pull ring and pull the first connecting part 221 during the unlocking process, thereby further ensuring the quick-opening effect of the door lock.

[0046] Preferably, the latch 210 is provided with a groove (not shown in the figure), the groove extends along the Z direction, and the second end of the second connecting part 222 is slidably constrained to the groove.

[0047] Specifically, the width of the slide gradually decreases from the bottom wall of the slide to the opening of the slide. That is, along the Z direction, the cross-sectional shape of the slide is set as trapezoidal, dovetail, or "⊥" shaped. The second end of the second connecting part 222 is correspondingly provided with the slide and is slidably limited and connected to the slide. With this configuration, when the connecting part 220 is pulled, it is ensured that the second connecting part 222 can drive the locking tongue 210 to move. At the same time, during the process of the second connecting part 222 driving the locking tongue 210 to move, the second connecting part 222 is prevented from disengaging from the locking tongue 210.

[0048] In order to further improve the locking effect between the locking part 211 and the buckle 230, in this embodiment, the locking part 211 is provided with a locking surface 2111, and the locking surface 2111 is inclined towards the connector 220 in the direction from the buckle 230 to the locking part 211.

[0049] Furthermore, a locking auxiliary member 2112 is movably provided on the locking surface 2111. When the locking part 211 is in the locked state, the locking auxiliary member 2112 can prevent the locking part 211 from disengaging from the buckle 230.

[0050] Combination Figure 2 and Figure 3As shown, in this embodiment, the locking part 211 is provided with an auxiliary groove 2214 extending along the Z direction. The opening of the auxiliary groove 2214 is located on the locking surface 2111. An auxiliary spring 2213 is provided on the bottom wall of the auxiliary groove 2214. A locking auxiliary member 2112 is connected to the end of the auxiliary spring 2213 away from the bottom wall of the auxiliary groove 2214, and the auxiliary groove 2214 is located on the side of the locking part 211 near the buckle 230. Thus, during the locking process of the latch 210 and the buckle 230, the locking auxiliary member 2112 is squeezed into the auxiliary groove 2214, and the auxiliary spring 2213 is compressed by the squeezing force. After the latch 210 is locked with the buckle 230, the auxiliary spring 2213 is no longer under the squeezing force and begins to extend autonomously, thereby pushing the locking auxiliary member 2112 to protrude from the locking surface 2111. This reduces the probability of the latch 210 and the buckle 230 disengaging autonomously, thereby further improving the locking effect.

[0051] In some other embodiments, the locking auxiliary member 2112 is directly set as a bent spring. After the spring is set on the locking surface 2111, the middle part of the spring bends away from the locking surface 2111. During the locking process of the latch 210 and the buckle 230, the spring is bent towards the locking surface 2111. After the latch 210 is locked with the buckle 230, the spring rebounds on its own.

[0052] Preferably, the reset member 240 is a compression spring, and the locking assembly 200 further includes a guide cylinder (not shown in the figure) fixedly disposed in the storage cavity. The guide cylinder extends along the extension and retraction direction of the compression spring and is sleeved on the compression spring.

[0053] Combination Figure 1 and Figure 2As shown, in this embodiment, the reset member 240 is configured as a compression spring and is located on the side of the latch 210 away from the buckle 230. When the connecting member 220 is pulled towards the buckle 230, the latch 210 moves away from the buckle 230 and disengages from the buckle 230, while the compression spring is compressed by the compressive force. When the door lock is in the open state, the connecting member 220 is no longer pulled. At this time, the compression spring no longer bears the compressive force and begins to extend autonomously, driving the latch 210 to move towards the buckle 230 until the latch 210 abuts against the inner wall of the storage cavity. When it is necessary to close the maintenance door, the connecting member 220 can be pulled to lock the latch 210 against the buckle 230; alternatively, the maintenance door can be pushed directly to cause the latch 210 to collide with the buckle 230, compressing the compression spring and thus locking the latch 210 against the buckle 230. Since a guide cylinder is also fixedly installed inside the storage cavity, the guide cylinder extends along the extension and retraction direction of the compression spring and is sleeved on the compression spring. Therefore, the guide cylinder can guide the compression spring to always be compressed or extended autonomously along a predetermined route, while preventing the compression spring from tipping over or bending during the compression or autonomous extension process, thereby further ensuring the effectiveness of the locking tongue 210.

[0054] In some other embodiments, the reset member 240 may also be configured as a tension spring and disposed on the side of the latch 210 near the latch 230. When the connector 220 is pulled toward the latch 230, the tension spring is stretched; when the door lock is in the open state, the connector 220 is no longer pulled, and the tension spring no longer bears the tension and begins to retract autonomously, thereby moving the latch 210 to its original position.

[0055] Preferably, the door lock further includes a connecting plate 300, which is provided with a connecting through hole 310. When the door lock body 100 is fixedly connected to the mounting part, the connecting plate 300 is fixedly connected to the door lock body 100 through the connecting through hole 310.

[0056] In this embodiment, two connecting plates 300 are provided. After the door lock body 100 is installed in the mounting part, the two connecting plates 300 are fixedly connected to both ends of the door lock body 100 through the connecting through holes 310, so that the maintenance door is located between the two connecting plates 300, thereby improving the connection strength and connection stability of the door lock body 100 installed in the mounting part, and thus ensuring the use effect of the door lock.

[0057] In addition to being used on access doors, the door lock provided in this embodiment can also be used on cabinets, drawers, room doors, etc., depending on actual needs, which will not be elaborated here.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A quick opening door lock for a service door, applied to a cruise ship, characterized in that, include: The door lock body (100) is fixedly connected to the mounting part on the inspection door of the cruise ship, and the door lock body (100) is provided with a storage cavity through the door lock body (100) along the Z direction; The locking assembly (200) includes a latch (210), a connector (220), a latch (230), and a reset member (240). The connector (220) is rotatably disposed at the upper end of the storage cavity, and the latch (210) is movably disposed at the lower end of the storage cavity. The locking part (211) of the latch (210) is exposed below the storage cavity, and the latch (210) is throttle connected to the connector (220). The reset member (240) is disposed between the latch (210) and the inner wall of the storage cavity. The latch (230) is disposed opposite to the locking part (211) and is disposed on the wall (10) of the cruise ship in correspondence with the mounting part. The locking part (211) has a locked state and an open state. When the locking part (211) is in the locked state, the locking part (211) is locked with the latch (230). Move the connector (220) toward the buckle (230) so that the locking part (211) changes from the locked state to the open state; The locking part (211) is provided with a locking surface (2111), and the locking surface (2111) is inclined towards the connector (220) in the direction from the buckle (230) to the locking part (211). A locking auxiliary member (2112) is movably provided on the locking surface (2111). When the locking part (211) is in the locked state, the locking auxiliary member (2112) can prevent the locking part (211) from disengaging from the buckle (230). The locking part (211) is provided with an auxiliary groove (2214) extending along the Z direction. The opening of the auxiliary groove (2214) is provided on the locking surface (2111). An auxiliary spring (2213) is provided on the bottom wall of the auxiliary groove (2214). The locking auxiliary member (2112) is connected to one end of the auxiliary spring (2213) away from the bottom wall of the auxiliary groove (2214). The auxiliary groove (2214) is provided on the side of the locking part (211) near the buckle (230).

2. A quick release door latch according to claim 1 wherein, The locking assembly (200) also includes an auxiliary plate (250), and the connector (220) includes a first connecting portion (221) and a second connecting portion (222). The auxiliary plate (250) is located inside the storage cavity and is disposed between the latch (210) and the connector (220). The auxiliary plate (250) is provided with a through hole. The first end of the first connecting part (221) is vertically fixedly connected to the first end of the second connecting part (222). The second end of the second connecting part (222) passes through the through hole and is connected to the latch (210) in a transmission manner. When the locking part (211) is in the locked state, the abutting surface (2211) on the first connecting part (221) abuts against the auxiliary plate (250).

3. The quick-opening door lock for the inspection door according to claim 2, characterized in that, An auxiliary abutment block (251) is provided on the upper end surface of the auxiliary plate (250). When the locking part (211) is in the locked state, the abutment surface (2211) abuts against the auxiliary abutment block (251).

4. The quick-opening door lock for the maintenance door according to claim 2, characterized in that, The second end of the first connecting part (221) is provided with a gripping hole (2212) so that the first connecting part (221) forms a pull ring.

5. The quick-opening door lock for the maintenance door according to claim 4, characterized in that, Along the direction away from the contact surface (2211), the sidewall of the gripping hole (2212) is inclined toward the center of the gripping hole (2212).

6. The quick-opening door lock for the maintenance door according to claim 2, characterized in that, The latch (210) is provided with a groove that extends along the Z direction, and the second end of the second connecting part (222) is slidably constrained to the groove.

7. The quick-opening door lock for the maintenance door according to claim 2, characterized in that, The reset component (240) is configured as a compression spring, and the locking assembly (200) further includes a guide cylinder fixedly disposed in the storage cavity. The guide cylinder extends along the extension and retraction direction of the compression spring and is sleeved on the compression spring.

8. The quick-opening door lock for maintenance doors according to any one of claims 1-7, characterized in that, The quick-opening door lock for the maintenance door also includes a connecting plate (300), which has a connecting through hole (310). When the door lock body (100) is fixedly connected to the mounting part, the connecting plate (300) is fixedly connected to the door lock body (100) through the connecting through hole (310).

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