Door releaseable RV mechanical lock

Abstract

The utility model discloses a door inside can be unlocked formula house car mechanical lock, including including lock body, lock cover, lock tongue, main lock cylinder and door inside unlocking subassembly. The lock tongue is linked with the lock cover through the first pivot, and the main lock cylinder is installed in the lock cover, and the lock cover is equipped with locking mechanism with the lock body. The door inside unlocking subassembly is linked with the main lock cylinder through rotating positioning cover, inside unlocking key and realizes inside and outside double unlocking. Pure mechanical structure, can inside quick unlocking in emergency, promotes safety redundancy and reliability, is applicable to house car door.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to an unlockable mechanical lock for RVs located inside the door. Background Technology

[0002] With the continuous improvement of living standards and the development of social civilization, RV travel has gradually emerged as a lifestyle, and RV locks are an indispensable part of RVs. Existing RV locks can usually only be unlocked by inserting a key from the outside and cannot be opened directly from the inside. In case of emergencies (such as fire inside the RV, malfunction of the external lock, loss of the key, or people being accidentally locked inside), people inside cannot quickly unlock the door to escape, posing a serious safety hazard. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a mechanical lock for RVs that facilitates safe unlocking from inside the RV in emergency situations.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: an unlockable mechanical lock for RVs from the inside, comprising a lock body with an installation cavity on the outside, a lock cover placed in the installation cavity, and a lock tongue located on the inside of the lock body. The lock tongue is linked with the lock cover. One end of the lock cover is rotatably positioned on the lock body via a first rotating shaft. A main lock cylinder is installed on the other end of the lock cover. A locking mechanism linked with the main lock cylinder is provided between the lock cover and the lock body. An inner unlocking hole corresponding to the position of the main lock cylinder is machined on the inside of the lock body. An inside unlocking component capable of unlocking or locking the main lock cylinder is installed at the inner unlocking hole.

[0005] When unlocking from the outside, an external key is inserted into the main lock cylinder and rotated, releasing the locking mechanism. The lock cover swings away from the lock body around the first pivot (either manually lifted or automatically released by a torsion spring). The bolt, along with the lock cover, simultaneously disengages from the door frame, completing the normal unlocking process. Reversing the key and pressing the lock cover resets the bolt, locking the door again. When unlocking from the inside, the internal unlocking component controls the rotation of the main lock cylinder, similarly triggering the locking mechanism to release. The lock cover swings around the first pivot, and the bolt simultaneously disengages from the door frame, quickly unlocking from the inside. Both the internal and external unlocking processes are linked by a purely mechanical structure. This design adds a linkage channel between the internal unlocking component and the main lock cylinder, providing an independent and reliable unlocking path for internal personnel in cases of external lock failure, lost keys, or emergency escape scenarios. This effectively addresses the security risks of existing RV locks that can only be unlocked from the outside, meeting the high requirements of emergency escape. Meanwhile, the lock body integrates the main lock cylinder, locking mechanism, and internal unlocking components into one unit, eliminating the need for additional escape windows or complex electronic systems. This simplifies the RV door structure design, and the purely mechanical structure avoids the risk of electronic component aging and failure, ensuring long-term stability and reliability. Furthermore, the internal unlocking components are concealed inside the lock body, making them undetectable or easily damaged from the outside. This ensures convenient emergency unlocking without compromising the lock's anti-theft performance, achieving a balance between functionality and security. It enhances the security, reliability, and practicality of RV locks without increasing additional costs, making it suitable for various RV door lock scenarios.

[0006] Furthermore, the door unlocking component includes a rotating positioning sleeve and an inner unlocking key. The rotating positioning sleeve is rotatably positioned at the inner unlocking hole. The rotating positioning sleeve has a rectangular linkage hole in the middle that is adapted to the outer periphery of the inner unlocking key. When the inner unlocking key slides along the rectangular linkage hole until it is inserted into the main lock cylinder, rotating the inner unlocking key will simultaneously drive the main lock cylinder to rotate.

[0007] The rotating positioning sleeve is rotatably positioned at the inner unlocking hole, serving the dual function of a bearing and guide seat. This ensures that the inner unlocking key can only move along a predetermined path (i.e., axial sliding and circumferential rotation), resulting in smooth operation and precise positioning. The rectangular linkage hole design matches the outer circumference of the inner unlocking key (such as a rectangular rod). This non-circular cross-section torque transmission method prevents the key from slipping inside the hole, ensuring that when the key is turned from the inside, the torque is 100% transmitted to the main lock cylinder, achieving reliable unlocking or locking. This structure has a high degree of standardization, and the inner unlocking key can be stored separately as a tool in the RV for use in emergencies, improving security. As a preferred method, the rod of the inner unlocking key is a flat square rod that fits tightly with the rectangular linkage hole, and the end that inserts into the main lock cylinder is machined with teeth that match the tumbler structure of the main lock cylinder. When unlocking from the inside is required, the user pushes the inner unlocking key forward until its toothed end is fully inserted into the keyhole of the main lock cylinder and reaches the bottom. Rotating the key handle will cause the rotating positioning sleeve and the main lock cylinder to rotate together, completing the unlocking action. The insertion depth design ensures that torque is transmitted only when the key is fully inserted, preventing operational failures or damage caused by incomplete insertion.

[0008] Furthermore, the inner unlocking key is linked to an elastic reset member that can drive the inner unlocking key to axially reset along the inner unlocking hole. The inner unlocking key has a longitudinal strip hole. The elastic reset member is a first spring installed at the longitudinal strip hole. The rotating positioning sleeve has a transverse mounting hole corresponding to the longitudinal strip hole. A limit member is fixed at the transverse mounting hole. One end of the first spring presses against the limit member, and the other end of the first spring presses against the inner end of the longitudinal strip hole.

[0009] This solution adds an automatic reset function to the internal unlocking key, greatly optimizing the user experience and security. The elastic reset element (first spring) allows the internal unlocking key to automatically retract from the main lock cylinder and return to its initial position under the force of the first spring after the user completes the internal unlocking operation and releases the key. This avoids potential obstruction, corrosion, or accidental impact damage to the internal unlocking key if it remains inserted in the internal channel for extended periods. Furthermore, the automatic retraction of the key makes it more concealed, reducing the risk of it being observed from the outside through the internal unlocking hole or manipulated with tools. The design of the longitudinal strip hole, the transverse mounting hole, and the limiting element cleverly integrates the installation and limiting of the first spring between the internal unlocking key and the rotating positioning sleeve, resulting in a compact structure that does not occupy additional space. As a preferred embodiment, the limiting element can be a pin that passes through the transverse mounting hole of the rotating positioning sleeve, with both ends of the pin fixed to the lock body or the rotating positioning sleeve. The first spring is fitted onto the pin, with one end resting against the middle of the pin or a washer fixed to the pin, and the other end resting against the deep end face of the longitudinal slot of the inner unlocking key. When the inner unlocking key is pushed inward, the key slides along the slot and compresses the first spring; after the key is released, the compressed first spring releases its elasticity, pushing the key to slide in the opposite direction along the slot until the outer end of the slot on the key contacts and limits contact with the pin. At this point, the toothed end of the key is completely disengaged from the main lock cylinder, completing the automatic reset.

[0010] Furthermore, the locking mechanism includes an unlocking component. A manual unlocking groove is machined in the middle of the lock cover. The upper end of the unlocking component extends to the manual unlocking groove. The middle of the unlocking component is rotatably positioned on the lock cover by a second pivot. A barb is machined at the lower end of the unlocking component. A hook groove corresponding to the barb is machined on the inner side of the lock body. A stop block extending towards the main lock cylinder is also provided at the lower end of the unlocking component. A clearance groove is machined on the lower end of the main lock cylinder and on its outer peripheral surface. The locking mechanism also includes a pushing structure. When the clearance groove corresponds to the hook groove, the pushing structure can push the stop block to swing upward.

[0011] The engagement of the barb and the hook groove on the lock body forms the most direct mechanical locking point between the lock cover and the lock body, resulting in a robust structure with strong impact resistance. The key is the engagement between the stop block and the clearance groove on the main lock cylinder, which links the lock cylinder's state with its mechanical locking state: only when the main lock cylinder rotates to the correct unlocking position (the clearance groove is aligned with the stop block) can the stop block be pushed and swing, releasing the barb; if the main lock cylinder is in the locked position, its complete outer circumference will prevent the stop block from swinging, preventing the barb from disengaging from the hook groove, thus ensuring the lock securely locks the door and provides security. The push mechanism design allows for automatic or semi-automatic unlocking, improving operational convenience.

[0012] Furthermore, the inner side of the lock body is machined with a positioning hole corresponding to the stop block, the pushing structure includes a pushing rod inserted into the positioning hole, a second spring is sleeved on the outer periphery of the pushing rod, a first step is provided on the inner side of the positioning hole, the lower end of the second spring presses against the first step, a second step is also provided on the inner side of the positioning hole, and a stop ring is provided on the outer periphery of the pushing rod.

[0013] The cooperation between the push rod and the positioning hole ensures the linearity and precision of the pushing action, guaranteeing that the force is accurately applied to the stop block. The first step supports the lower end of the spring, and the second step cooperates with the stop ring on the push rod to jointly limit the initial position and maximum stroke of the push rod when not triggered externally, preventing it from excessively popping out or falling off. When using this push structure, with the door unlocked from the inside, pressing the inner unlocking key rotates the main lock cylinder until the clearance groove aligns with the stop block. Pressing the push rod then pushes the unlocking component to swing, causing the barb to disengage from the hook groove, allowing the lock cover to rotate and unlock. After the user releases the pressure, the second spring automatically resets the push rod.

[0014] Furthermore, the end of the rotating positioning sleeve facing the main lock cylinder is machined with a wedge-shaped block, the wedge-shaped block is opposite to the relief groove, the side of the stop block facing the main lock cylinder is provided with an arc-shaped surface, and the top of the wedge-shaped block is connected to a spherical positioning member, the spherical positioning member and the wedge-shaped block together form a pushing structure.

[0015] When the internal unlocking key is used from the inside, it is inserted and the main lock cylinder is turned. Since the internal unlocking key and the rotating positioning sleeve are linked through a rectangular hole, the rotating positioning sleeve also rotates synchronously. As the rotating sleeve rotates (the clearance groove rotates to correspond with the stop block), the wedge-shaped block's inclined or top surface gradually approaches and contacts the arc-shaped surface on the stop block. With continued rotation, the wedge-shaped block "climbs" or "presses" along the arc-shaped surface of the stop block. The radial force generated during this process pushes the stop block away from the main lock cylinder (i.e., upwards), thereby prying the unlocking mechanism to rotate and releasing the barb. The spherical positioning element helps to form a smooth point contact with the arc-shaped surface, reducing friction and making the operation smoother. This solution completely synchronizes and integrates the internal unlocking action (turning the key) with the action of triggering the locking mechanism to release (the wedge-shaped block pushing), resulting in clear logic and smooth operation.

[0016] Furthermore, a torsion spring is fitted on the first rotating shaft, with one torsion arm of the torsion spring pressing against the lock body and the other torsion arm of the torsion spring pressing against the lock cover.

[0017] The elastic potential energy stored in the torsion spring allows the lock cover to automatically and quickly spring open a distance or fully open in the opening direction (usually outward rotation) the instant the locking mechanism is released (the barb disengages from the hook groove), causing the linked bolt to retract. This greatly facilitates the user, especially in emergency escape situations, eliminating the need to pull the lock cover forcefully; the door can be easily pushed open after unlocking. Furthermore, the automatic spring-loaded action provides clear feedback of successful unlocking. The two torsion arms of the torsion spring press against the lock body and lock cover respectively, resulting in a simple and direct structure, high torque transmission efficiency, and ease of assembly and preload adjustment.

[0018] Furthermore, the latch includes a latch body and connecting arms symmetrically arranged on both sides of the latch body. One end of the connecting arm is fixedly connected to the latch body by a screw, and the other end of the connecting arm is fixedly connected to a first rotating shaft by a screw. The end of the lock cover is fixedly connected to the first rotating shaft, and both ends of the first rotating shaft are rotatably inserted into the lock body.

[0019] The beneficial effects of this utility model are: 1. In this utility model, a split-type latch body and connecting swing arms are adopted and connected by screws, making the processing and assembly of each component more flexible and convenient, reducing mold costs and processing difficulty. The latch body can be made of high-strength material to enhance shear resistance. Two symmetrical connecting swing arms firmly connect the latch body to the first rotating shaft, forming a stable double-support transmission structure that can evenly transmit torque and prevent the latch from jamming due to unilateral force. The first rotating shaft is supported on the lock body at both ends, forming the core load-bearing shaft of the entire rotating part, with good structural rigidity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present utility model. Figure 2 ; Figure 3 This is a cross-sectional schematic diagram of Embodiment 1 of the present utility model; Figure 4 This is an exploded view of Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the unlocked state in Embodiment 2 of this utility model; Figure 6 This is an exploded view of Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the transmission plate in Embodiment 2 of this utility model.

[0021] Lock body 1; positioning hole 11; internal unlocking hole 12; hook groove 13; lock cover 2; bolt 3; bolt body 31; connecting swing arm 32; first rotating shaft 4; main lock cylinder 5; clearance groove 51; unlocking component 61; barb 611; stop block 612; arc surface 6121; second rotating shaft 62; push structure 63; push rod 631; second spring 632; stop ring 633; ​​rotating positioning sleeve 71; rectangular linkage hole 711; transverse mounting hole 712; limiting component 713; first spring 714; internal unlocking key 72; longitudinal strip hole 721; wedge block 73; spherical positioning component 74; torsion spring 8. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: As Figures 1 to 4 The door-openable mechanical lock for RVs shown includes a lock body 1, a lock cover 2, a lock tongue 3, a first pivot 4, a main lock cylinder 5, a locking mechanism, an door-opening component, and a torsion spring 8.

[0024] The outer side of the lock body 1 is machined with a mounting cavity for accommodating other components. The lock cover 2 is placed in the mounting cavity, and one end of it is rotatably connected to the lock body 1 via a first rotating shaft 4. Specifically, one end of the lock cover 2 is fixedly connected to the first rotating shaft 4, and both ends of the first rotating shaft 4 are rotatably inserted into pre-set shaft holes on the lock body 1, thereby realizing the swinging of the lock cover 2 relative to the lock body 1. The latch 3 is located on the inner side of the lock body 1, and one end of it is linked with the first rotating shaft 4, so that the swinging of the lock cover 2 can drive the latch 3 to move synchronously, realizing the engagement or disengagement with the door frame. As a preferred embodiment, the latch 3 includes a latch body 31 and connecting swing arms 32 symmetrically arranged on both sides of the latch body 31. One end of each connecting swing arm 32 is fixedly connected to the latch body 31 by screws, and the other end is also fixedly connected to the first rotating shaft 4 by screws. This split design facilitates processing and assembly, and the double support structure makes the force more even.

[0025] The other end of the lock cover 2 is equipped with a main lock cylinder 5, which is a conventional blade lock cylinder structure and can be operated using an external key. A locking mechanism, linked to the main lock cylinder 5, is provided between the lock cover 2 and the lock body 1 to lock the lock cover 2 in the closed position. A torsion spring 8 is sleeved on the first rotating shaft 4, with its two torsion arms pressing against the lock body 1 and the lock cover 2 respectively, pre-storing elastic potential energy. When the locking mechanism is released, the torsion spring 8 automatically drives the lock cover 2 to spring back around the first rotating shaft 4 in a direction away from the lock body 1, providing automatic opening and clear unlocking feedback.

[0026] The inner side of the lock body 1 is machined with an inner unlocking hole 12 corresponding to the position of the main lock cylinder 5. An inner unlocking assembly is installed at the inner unlocking hole 12, which can be operated from inside the vehicle to unlock or lock the main lock cylinder 5. The inner unlocking assembly includes a rotating positioning sleeve 71 and an inner unlocking key 72. The rotating positioning sleeve 71 is rotatably positioned at the inner unlocking hole 12, acting as a guide seat. A rectangular linkage hole 711 is formed through the center of the rotating positioning sleeve 71. The rod of the inner unlocking key 72 is a flat square rod that mates with the rectangular linkage hole 711, and its insertion end is machined with teeth that match the internal structure of the main lock cylinder 5. When the inner unlocking key 72 slides along the rectangular linkage hole 711 and is fully inserted into the keyhole of the main lock cylinder 5, rotating the inner unlocking key 72 transmits torque through the rectangular linkage hole 711, synchronously driving the main lock cylinder 5 to rotate, achieving reliable internal unlocking or locking.

[0027] Furthermore, to achieve automatic reset of the inner unlocking key 72, a longitudinal strip-shaped hole 721 is provided on the inner unlocking key 72. A transverse mounting hole 712 corresponding to the longitudinal strip-shaped hole 721 is machined on the rotating positioning sleeve 71. A pin serving as a limiting member 713 is fixedly inserted through the transverse mounting hole 712. A first spring 714 serving as an elastic reset member is installed inside the longitudinal strip-shaped hole 721. One end of the first spring 714 presses against the limiting member 713, and the other end presses against the inner end face of the longitudinal strip-shaped hole 721. When the inner unlocking key 72 is pushed inward, the first spring 714 is compressed; after being released, the elastic force of the first spring 714 drives the inner unlocking key 72 to automatically retract, causing its toothed end to disengage from the main lock cylinder 5 and return to its concealed initial position.

[0028] The locking mechanism includes an unlocking component 61. A manual unlocking groove is machined in the middle of the lock cover 2, and the upper end of the unlocking component 61 extends to this groove, allowing for manual pressing. The middle part of the unlocking component 61 is rotatably positioned on the lock cover 2 via a second pivot 62. A barb 611 is machined at the lower end of the unlocking component 61, and a corresponding hook groove 13 is machined on the inner side of the lock body 1. When the lock cover 2 is closed, the barb 611 engages with the hook groove 13, achieving mechanical locking. The lower end of the unlocking component 61 also has a stop block 612 extending towards the main lock cylinder 5. Correspondingly, a clearance groove 51 is machined on the lower outer circumferential surface of the main lock cylinder 5.

[0029] The inner side of the lock body 1 is machined with a positioning hole 11 corresponding to the stop block 612. The pushing structure 63 of the locking mechanism is installed at the positioning hole 11. The pushing structure 63 includes a pushing rod 631 and a second spring 632. The pushing rod 631 is inserted into the positioning hole 11, and the second spring 632 is sleeved on its outer periphery. The inner side of the positioning hole 11 is provided with a first step, and the lower end of the second spring 632 presses against the first step. The inner side of the positioning hole 11 is also provided with a second step, and the outer periphery of the pushing rod 631 is provided with a stop ring 633 to limit the maximum stroke of the pushing rod 631. In the natural state, the elastic force of the second spring 632 causes the head of the pushing rod 631 to return to its original position. When the main lock cylinder 5 (whether by an external key or an internal key) is rotated to the correct unlocking position, causing the clearance groove 51 on its outer peripheral surface to rotate to be opposite the stop block 612, an externally applied force (such as finger pressing) can act on the pushing rod 631, causing it to overcome the elastic force of the second spring 632 and move inward. The head of the push rod 631 enters the clearance groove 51 area and abuts against the stop block 612, pushing the stop block 612 to swing upward. Since the unlocking member 61 rotates around the second pivot 62, the upward swing of the stop block 612 will cause the barb 611 to swing downward, thereby disengaging it from the hook groove 13 of the lock body 1 and releasing the lock cover 2. Subsequently, under the action of the torsion spring 8, the lock cover 2 automatically pops open and drives the bolt 3 to retract, completing the unlocking.

[0030] The working principle of Example 1 is as follows: When unlocking from the outside, insert the external key into the main lock cylinder 5 and turn it to the unlock position (aligning the recess 51 with the stop block 612). Then, press the unlocking piece 61 from the outside. The unlocking piece 61 rotates around the second pivot 62, and the upward swing of the stop block 612 will cause the barb 611 to swing downward, thereby disengaging it from the hook groove 13 of the lock body 1 and releasing the lock cover 2. Turning the key in the opposite direction and pressing down the lock cover 2 will reset the bolt 3 and engage it, allowing the barb 611 to insert into the hook groove 13.

[0031] When unlocking from the inside, press the inner unlocking key 72 and push it all the way forward until its toothed end is fully inserted into the main lock cylinder 5. Then, turn the handle of the inner unlocking key 72 to rotate the main lock cylinder 5 to the unlock position. Next, press the push rod 631 to push the stop block 612, releasing the barb 611. After the locking mechanism is released, the torsion spring 8 drives the lock cover 2 to spring open, completing the quick unlocking from the inside. After releasing the inner unlocking key 72, it automatically returns to its original position under the action of the first spring 714.

[0032] Example 2: Figures 5 to 7 As shown, the main difference between Embodiment 2 and Embodiment 1 lies in the different pushing structure 63. The pushing structure 63 in Embodiment 2 is as follows: a wedge-shaped block 73 is machined on the end of the rotating positioning sleeve 71 facing the main lock cylinder 5. This wedge-shaped block 73 is positioned opposite to the clearance groove 51 on the main lock cylinder 5. A spherical positioning element 74 is connected to the top of the wedge-shaped block 73. The wedge-shaped block 73 and the spherical positioning element 74 together constitute the pushing structure 63 in this embodiment.

[0033] Unlocking from the inside: The inside unlocking key 72 is pressed by hand until its toothed end is fully inserted into the main lock cylinder 5. Since the inside unlocking key 72 and the rotating positioning sleeve 71 are linked through the rectangular linkage hole 711, when the handle of the inside unlocking key 72 is rotated, it simultaneously drives the rotating positioning sleeve 71 and the wedge block 73 fixed thereon to rotate together. The rotation of the inside unlocking key 72 also simultaneously drives the main lock cylinder 5 to rotate to the unlock position, causing the clearance groove 51 on its outer circumference to rotate and align with the stop block 612. As the rotating positioning sleeve 71 rotates, the wedge block 73 gradually approaches the stop block 612. The inclined surface (or top surface) of the wedge block 73 contacts the arc surface 6121 of the stop block 612. Continuing to rotate the key, the wedge block 73 "climbs" along the arc surface 6121, generating a radially outward thrust. This thrust, through the point contact between the spherical positioning element 74 and the arc-shaped surface 6121, smoothly pushes the stop block 612 away from the main lock cylinder 5 (i.e., upward). The upward swing of the stop block 612 causes the entire unlocking element 61 to rotate around the second pivot 62, causing the lower end of its barb 611 to swing downward, thereby disengaging from the hook groove 13 of the lock body 1 and releasing the lock. Subsequently, the torsion spring 8 quickly drives the lock cover 2 to spring open, causing the bolt 3 to retract, completing a continuous internal unlocking operation. Throughout the process, the action of turning the key directly and synchronously triggers the release of the locking mechanism, without the need for additional pressing steps.

[0034] The procedure for unlocking the door from the outside is the same as in Example 1, so it will not be described again here.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is 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. An unlockable mechanical lock for RVs from the inside, comprising a lock body with a mounting cavity machined on the outside, a lock cover placed within the mounting cavity, and a lock tongue located inside the lock body, characterized in that: The latch is linked to the lock cover. One end of the lock cover is rotatably positioned on the lock body via a first rotating shaft. The other end of the lock cover is equipped with the main lock cylinder. A locking mechanism linked to the main lock cylinder is provided between the lock cover and the lock body. An inner unlocking hole corresponding to the position of the main lock cylinder is machined on the inner side of the lock body. An inner unlocking component capable of unlocking or locking the main lock cylinder is installed at the inner unlocking hole.

2. The unlockable mechanical lock for RVs from the inside as described in claim 1, characterized in that: The door unlocking component includes a rotating positioning sleeve and an inner unlocking key. The rotating positioning sleeve is rotatably positioned at the inner unlocking hole. The rotating positioning sleeve has a rectangular linkage hole in the middle that is adapted to the outer periphery of the inner unlocking key. When the inner unlocking key slides along the rectangular linkage hole until it is inserted into the main lock cylinder, rotating the inner unlocking key will simultaneously drive the main lock cylinder to rotate.

3. The unlockable mechanical lock for RVs from the inside as described in claim 2, characterized in that: The inner unlocking key is linked to an elastic reset component that can drive the inner unlocking key to axially reset along the inner unlocking hole. The inner unlocking key has a longitudinal strip hole. The elastic reset component is a first spring installed at the longitudinal strip hole. The rotating positioning sleeve has a transverse mounting hole corresponding to the longitudinal strip hole. A limit component is fixed at the transverse mounting hole. One end of the first spring presses against the limit component, and the other end of the first spring presses against the inner end of the longitudinal strip hole.

4. The unlockable mechanical lock for RVs from the inside, as described in claim 2 or 3, is characterized in that: The locking mechanism includes an unlocking component. A manual unlocking groove is machined in the middle of the lock cover. The upper end of the unlocking component extends to the manual unlocking groove. The middle part of the unlocking component is rotatably positioned on the lock cover by a second rotating shaft. A barb is machined at the lower end of the unlocking component. A hook groove corresponding to the barb is machined on the inner side of the lock body. A stop block extending towards the main lock cylinder is also provided at the lower end of the unlocking component. A clearance groove is machined on the lower end of the main lock cylinder and on its outer peripheral surface. The locking mechanism also includes a pushing structure. When the clearance groove corresponds to the hook groove, the pushing structure can push the stop block to swing upward.

5. The unlockable mechanical lock for RVs from the inside as described in claim 4, characterized in that: The inner side of the lock body is machined with a positioning hole corresponding to the stop block. The pushing structure includes a pushing rod inserted into the positioning hole. A second spring is sleeved on the outer periphery of the pushing rod. A first step is provided on the inner side of the positioning hole. The lower end of the second spring presses against the first step. A second step is also provided on the inner side of the positioning hole. A stop ring is provided on the outer periphery of the pushing rod.

6. The unlockable mechanical lock for RVs from the inside as described in claim 4, characterized in that: The rotating positioning sleeve has a wedge-shaped block machined at the end facing the main lock cylinder. The wedge-shaped block is opposite to the relief groove. The stop block has an arc-shaped surface on the side facing the main lock cylinder. A spherical positioning member is connected to the top of the wedge-shaped block. The spherical positioning member and the wedge-shaped block together form a pushing structure.

7. The unlockable mechanical lock for RVs from the inside as described in claim 1, characterized in that: A torsion spring is fitted on the first rotating shaft. One torsion arm of the torsion spring presses against the lock body, and the other torsion arm of the torsion spring presses against the lock cover.

8. The unlockable mechanical lock for RVs from the inside as described in claim 1, characterized in that: The latch includes a latch body and connecting arms symmetrically arranged on both sides of the latch body. One end of the connecting arm is fixedly connected to the latch body by a screw, and the other end of the connecting arm is fixedly connected to a first rotating shaft by a screw. The end of the lock cover is fixedly connected to the first rotating shaft, and both ends of the first rotating shaft are rotatably inserted into the lock body.

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