A tank lock

Abstract

The application relates to an oil tank lock which comprises a base and an oil tank cover assembly arranged on the base, the oil tank cover assembly comprises a lock body seat, a surface cover and a flip cover, the lock body seat is fixedly connected with the surface cover to form an installation chamber, an electromagnetic valve and a lock tongue are arranged in the installation chamber, the surface cover is hinged to the base, the flip cover is hinged to the surface cover, a pin shaft and a micro switch are further arranged in the installation chamber, the pin shaft is arranged in a split mode with the lock tongue, the flip cover can drive the lock tongue and the pin shaft to slide in the installation chamber at the same time when the flip cover rotates relative to the surface cover, and the lock tongue can slide in the unlocking direction relative to the pin shaft when the surface cover is closed relative to the base. By adopting the above technical scheme, the oil tank lock is provided, the lock tongue and the pin shaft are arranged in a split mode, the lock tongue can slide synchronously with the pin shaft when unlocking, the pin shaft is limitedly matched with the electromagnetic valve, and the lock tongue can slide in the unlocking direction when the surface cover is closed, so that the oil tank cover can be locked, and damage of the lock tongue can be avoided.

Description

Technical Field

[0001] This invention relates to the field of vehicle lock technology, and in particular to a fuel tank lock. Background Technology

[0002] Existing motorcycle fuel tank locks are mainly opened with traditional mechanical keys, which lack a sense of technology and user experience, and require taking out the key when refueling, making the operation quite cumbersome. If it is a cable-operated type, it requires a lot of force to operate the button, which is also not a good user experience. Traditional key-operated methods require carrying a mechanical key with you, and you must insert the key into the lock cylinder to operate it. Carrying a mechanical key or opening a fuel tank lock is extremely inconvenient.

[0003] Another type of electronically controlled fuel tank lock for motorcycles on the market includes a base and a fuel tank cap assembly mounted on the base. The fuel tank cap assembly includes a lock body, a faceplate, and a flip cover. The faceplate is hinged to the base, and the flip cover is hinged to the faceplate. The lock body is connected to the faceplate. The lock body contains a solenoid valve and a latch. A pin is integrally or fixedly connected to the latch, and the pin has a groove. The solenoid valve's limiting pin engages with the groove. The lock body also contains a return spring that drives the latch to reset. When the fuel tank cap needs to be opened, the solenoid valve is energized, the limiting pin retracts, and the flip cover rotates relative to the faceplate. The flip cover pushes the latch to slide, and the end of the latch disengages from the faceplate, unlocking the cap. The faceplate can then be opened relative to the base.

[0004] Then, in the above-mentioned oil tank lock, the locking tongue and the pin are integrated or fixedly connected. After the locking tongue is reset under the action of the return spring, the solenoid valve is stuck in the pin groove. At this time, if the cover is pressed down, the locking tongue cannot retract and cannot be locked. The solenoid valve and the pin must be unlocked before locking can be performed. If the user applies strong force, the locking tongue is easy to bend and deform, and cannot be locked. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a fuel tank lock in which the locking tongue and the pin are set separately. When unlocking, the locking tongue can slide synchronously with the pin. When the fuel tank cover is closed while the locking tongue is in the slot, the locking tongue can slide independently in the unlocking direction. This can lock the fuel tank cover and avoid damage to the locking tongue.

[0006] The technical solution of the present invention: A fuel tank lock includes a base and a fuel tank cover assembly disposed on the base. The fuel tank cover assembly includes a lock body seat, a face cover, and a flip cover. The lock body seat and the face cover are fixedly connected to form an installation chamber. A solenoid valve and a locking tongue are disposed in the installation chamber. The face cover is hinged to the base, and the flip cover is hinged to the face cover. When the flip cover rotates relative to the face cover, it can drive the locking tongue to slide in the unlocking direction. A first return spring that drives the locking tongue to return to the locking direction is also disposed in the installation chamber. A pin and a micro switch are also disposed in the installation chamber. The pin and the latch are separate components. The latch has a protrusion, and the front end face of the pin is flush with the front end face of the protrusion. When the flip cover rotates relative to the cover, it can drive the latch and the pin to slide simultaneously in the mounting chamber. The pin can cooperate with the solenoid valve for limiting. When the pin slides under the drive of the flip cover, it can trigger a micro switch to drive the solenoid valve and the pin to release the limiting, thereby unlocking. The mounting chamber is also equipped with a second return spring that drives the pin to return to the upward locking direction. When the cover is closed relative to the base, the latch can slide independently relative to the pin in the unlocking direction.

[0007] Using the above technical solution, when the fuel tank cap needs to be opened, the flip cover is rotated. The flip cover pushes against the locking tongue and pin, causing the locking tongue and pin to slide within the mounting cavity. During the sliding process, the pin will press the contact of the micro switch, activating the micro switch and transmitting a signal to the control module. The control module controls the solenoid valve to operate, the output end of the solenoid valve retracts, and the limit between the solenoid valve and the pin is released. The pin and locking tongue can continue to slide until the locking tongue is released from the base, at which point the cover is unlocked. The cover can then be flipped relative to the base to open the fuel tank cap for refueling. When the cover is in the open state, if the flip cover is released, the locking tongue and pin will reset under the action of the first and second return springs. The pin will separate from the contact of the micro switch, the circuit board will receive the signal, and control the solenoid valve. The solenoid valve and pin will engage in a limit engagement, preventing the pin from sliding. However, if the cover is rotated downwards at this time, the locking tongue can slide independently into the mounting cavity, locking the cover. The pin and locking tongue are designed separately, ensuring precise control of the locking tongue by the solenoid valve while avoiding interference between the two, thus improving structural flexibility. When the cover is turned, both the locking tongue and pin slide simultaneously, achieving "one-click unlocking," which is convenient and requires no additional force, solving the problem of cumbersome unlocking steps in traditional fuel tank locks. The first return spring drives the locking tongue to automatically reset, and the second return spring drives the pin to automatically reset. This dual reset structure ensures that all components quickly return to their initial state after unlocking, guaranteeing the stability of subsequent locking and preventing lock failure due to improper reset. It also reduces the feeling of sticking when closing the cover, improving the smoothness of closing. The overall structure is compact, integrating components such as the solenoid valve, micro switch, locking tongue, pin, and return spring into the installation chamber, occupying little space and adapting to the fuel tank installation requirements of different vehicle models. It also improves the overall sealing and durability of the fuel tank lock, effectively preventing dust and rainwater from entering and damaging internal components, extending its service life.

[0008] A further feature of the present invention is that an elastic pad is fitted at the lower end of the lock body seat, and a driving spring is provided between the elastic pad and the bottom surface of the lock body seat. During the flip-top flipping process, the driving spring can drive the lock body seat to spring upward relative to the base to unlock the lock tongue.

[0009] With the above-mentioned further configuration, during the opening process of the flip cover relative to the cover, the drive spring uses its elasticity to drive the lock body seat to spring upward relative to the base, thereby automatically disengaging the bolt from the base and achieving smooth opening of the oil tank lock. Unlocking can be achieved without forcefully flipping the flip cover, which is more labor-saving. The elastic pad is fitted at the lower end of the lock body seat, which can absorb the impact force when the drive spring rebounds, reduce rigid collisions between metal parts, reduce working noise, and protect the surface of the lock body seat and the base from wear. The elastic pad itself has a certain sealing effect, which can prevent external dust, moisture, etc. from entering the interior of the lock body from the lower end of the lock body seat, thereby improving the environmental adaptability and service life of the oil tank lock.

[0010] A further provision of the present invention: the bottom of the lock body seat is provided with a mounting post and several positioning chambers located on the outer periphery of the mounting post, the elastic pad is sleeved on the mounting post, and the driving spring is installed in each positioning chamber, with the lower end of the driving spring abutting against the elastic pad.

[0011] By further configuring the above-mentioned features, multiple positioning chambers are set at the bottom of the lock body, each with an independent drive spring installed. This ensures that the elastic force is evenly distributed circumferentially, making the upward opening of the lock body smoother and more stable without deviation. This avoids jamming caused by unilateral force. The mounting post is used to fit the elastic pad, ensuring that the elastic pad is always in the center position and preventing displacement. Each positioning chamber radially limits the drive spring, preventing the spring from bending or falling out during compression or release, thus improving structural stability and assembly consistency. With multiple drive springs working together, even if one spring fails, the remaining springs can still provide sufficient elastic force to complete the unlocking action, enhancing the system's fault tolerance and long-term reliability.

[0012] In a further embodiment of the present invention, the solenoid valve and the micro switch are respectively located on both sides of the pin shaft. The pin shaft is provided with a slot and an obliquely arranged pressing surface on both sides. The slot is matched with the solenoid valve for limiting. When the pin shaft slides under the drive of the flip cover, the pressing surface on the pin shaft presses against the contact of the micro switch to connect the circuit, thereby driving the solenoid valve to contact and limit the pin shaft.

[0013] With the above-mentioned further configuration, when the pin slides down in the flip cover drive, its obliquely set abutting surface gradually presses against the contact of the micro switch, making the circuit conductive, and then driving the solenoid valve to act, converting the mechanical movement of the flip cover into an electrical signal, realizing intelligent control of the fuel tank lock. The oblique abutting surface and the micro switch contact are in progressive contact, which can avoid damage to the micro switch by rigid impact. At the same time, by adjusting the inclination and length of the abutting surface, the timing of circuit conduction can be precisely controlled to match the opening / closing stroke of the flip cover, improving system coordination.

[0014] A further provision of the present invention includes: a convex-shaped movable groove provided in the mounting cavity; the latch slides within the movable groove; a slot is provided on the front side wall of the movable groove for the latch to extend out of the mounting cavity; the latch has a mounting groove; a positioning block is provided within the movable groove; the positioning block extends into the mounting groove; and the first return spring is installed within the mounting groove, with both ends of the first return spring abutting against the positioning block and the side wall of the mounting groove, respectively.

[0015] The further design of the convex-shaped movable groove provides precise sliding guidance for the latch, restricting its sliding direction and preventing it from shifting or jamming during sliding. This ensures the latch is accurately aligned with the groove, improving locking and unlocking reliability. The groove on the front side wall of the movable groove cooperates with the latch, resulting in a simple structure and tight locking fit. This reduces the gap between the latch and the groove, preventing the latch from loosening due to bumps during vehicle operation and improving locking safety. The mounting groove on the latch cooperates with the positioning block in the movable groove. This provides additional limiting for the latch, further preventing it from shifting. It also provides a stable mounting space for the first return spring, ensuring that both ends of the spring can stably abut against the positioning block and the side wall of the mounting groove. This guarantees uniform elastic force from the return spring, driving the latch to return smoothly and preventing reset failure due to spring loosening. It also reduces spring deformation after long-term use, extending spring life and improving the overall durability of the fuel tank lock.

[0016] A further feature of the present invention is that: a groove is provided in the middle of the locking tongue, two protrusions are provided and respectively located on both sides of the groove, and the pin is located in the groove, with the groove and the pin engaging in a guide sliding fit.

[0017] The above-mentioned further design provides a sliding guide for the latch, preventing it from shifting or tilting during sliding. The two protrusions are located on both sides of the slide groove. On the one hand, they can limit the pin and prevent it from coming out of the slide groove, thus improving the stability of the fit. On the other hand, they increase the contact area between the pin and the latch, so that the driving force applied by the flip cover can be evenly transmitted to the latch and the pin, avoiding wear or jamming of components caused by unilateral force, and extending the service life of the latch and the pin.

[0018] A further embodiment of the present invention includes: a mounting box is provided in the mounting chamber, the solenoid valve, the micro switch and the second return spring are located in the mounting box, a circuit board is also provided in the mounting box, the solenoid valve and the micro switch are electrically connected to the circuit board, the rear end of the pin extends into the mounting box, and the second return spring abuts against the side wall of the mounting box and the rear end face of the pin.

[0019] With the above-mentioned further configuration, the mounting box, as an independent sub-component, allows for the pre-assembly and testing of the solenoid valve, micro switch, circuit board, pin, and spring before being installed into the base. This improves production efficiency and product consistency. Furthermore, the mounting box provides independent installation space for the solenoid valve, micro switch, circuit board, and second return spring, separating them from the sliding area of ​​the locking tongue to avoid interference. It also prevents dust and impurities from contacting the solenoid valve, ensuring its normal operation and reducing the failure rate.

[0020] A further embodiment of the present invention includes: the mounting box comprising a separate box body, a box cover, and a pressure plate; the box body having a first mounting area, a second mounting area, and a third mounting area that are interconnected; the solenoid valve being located in the first mounting area, with its output shaft able to enter and exit the second mounting area; the second reset spring and a portion of the pin being movably located in the second mounting area; the micro switch and the circuit board being located in the third mounting area, with the micro switch contacts extending into the second mounting area; the pressure plate being located above the second and third mounting areas; and the circuit board having a power line for external connection, located above the pressure plate, extending out of the mounting box and to the outside of the base.

[0021] With a further refinement of the above design, the housing, cover, and pressure plate are modular, allowing for independent processing and assembly. When repairing or replacing internal components such as solenoid valves, microswitches, and circuit boards, only the corresponding cover or pressure plate needs to be removed, without damaging the entire mounting box. This reduces maintenance costs and difficulty. The modular structure allows for individual precision control of each component, flexible assembly sequence, and reduces cumulative tolerances that may arise from integrated molding, thus improving the finished product yield. The first mounting area is dedicated to the solenoid valve, the second to mechanical moving parts (pins, return springs), and the third to electrical parts (microswitches, circuit boards). The three areas are interconnected, allowing the solenoid valve's output shaft to enter the second area to lock the pin, while the microswitch contacts can also extend into the second area to detect the pin position, achieving electromechanical integration. By arranging components with different functions in interconnected but relatively independent areas, the bulkiness caused by a dispersed layout is avoided. The increased size allows the entire lock body to be integrated into a smaller base, suitable for installation in confined spaces like fuel tanks. Although each zone is electrically connected, the space in each zone is large enough to accommodate the corresponding components. Isolation measures such as pressure plates ensure that there is no physical jamming or short circuit between the solenoid valve movement, pin sliding, and microswitch triggering. The pressure plate is located above the second and third mounting zones, which can longitudinally limit the pin and second return spring in the second zone and the microswitch and circuit board in the third zone, preventing them from jumping out during vibration or movement. At the same time, the pressure plate can also act as an isolation layer to prevent the power line above from directly pressing the sensitive components below. The power line is arranged on the pressure plate, which completely isolates it from the moving parts (pin and spring) in the second mounting zone and the microswitch contacts in the third mounting zone, preventing the wire from being pinched, worn, or hindering mechanical movement. The power line is led directly out to the outside of the base, which can be quickly plugged into the vehicle's main circuit or fuel tank cap detection system.

[0022] A further feature of the present invention is that one end of the flip cover is a driving end and the other end is a movable end. The movable end is mounted on the cover via a hinge shaft. The lower end face of the movable end is provided with a pushing part, so that when the flip cover is flipped, the pushing part pushes the locking tongue and the pin to slide.

[0023] The further design described above allows the flip cover to rotate flexibly around the hinge axis, reducing rotational resistance and making operation more effortless. The pusher on the lower end of the movable end can precisely push the latch and pin to slide when the flip cover is flipped, thus unlocking. The pusher increases the contact area between the flip cover and the latch and pin, making the driving force transmission more even and avoiding wear of components caused by excessive local force. At the same time, it ensures that the unlocking action is accurate and smooth, avoiding jamming. The design of the drive end provides users with a convenient point of force application. Users only need to press or flick the drive end to flip the flip cover, achieving one-button unlocking. The operation is simple and convenient, solving the problems of laborious and cumbersome unlocking of traditional fuel tank locks and improving the user experience.

[0024] A further feature of the present invention is that a buffer pad is provided on the face cover near the drive end, and the flip cover is placed on the buffer pad to increase the distance between the drive end and the face cover.

[0025] The above-mentioned further design allows for a larger gap between the flip cover and the front cover, making it easier for users to reach their hands into the gap to turn the flip cover and generate noise. The cushioning pad reduces the entry of dust and rainwater into the mounting chamber through the gap between the drive end and the front cover, protecting internal components and further improving the sealing and durability of the fuel tank lock. It also reduces the impact noise when the flip cover closes, enhancing the user experience. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is a cross-sectional view of a specific embodiment of the present invention; Figure 3 This is a cross-sectional view from another direction of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the installation chamber in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the pressure plate and power cord in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the interior of the mounting box according to a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the locking tongue and pin in a specific embodiment of the present invention; Figure 8 This is a schematic diagram of a pin shaft, a solenoid valve, and a micro switch according to a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the lock body seat and the elastic pad in a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the lock body seat and the drive spring in a specific embodiment of the present invention; Figure 11 This is a schematic diagram of the box body and the movable groove in a specific embodiment of the present invention; Figure 12 This is a schematic diagram of the faceplate according to a specific embodiment of the present invention; Figure 13 This is a schematic diagram of the flip cover according to a specific embodiment of the present invention; Figure 14 This is a schematic diagram showing the location of the slot in a specific embodiment of the present invention.

[0027] In the diagram, 1. Base; 11. Limiting block; 2. Fuel tank cap assembly; 21. Lock body seat; 211. Groove; 212. Mounting box; 2121. Box body; 2122. Box cover; 2123. Pressure plate; 2124. First mounting area; 2125. Second mounting area; 2126. Third mounting area; 213. Elastic pad; 214. Drive spring; 215. Mounting post; 216. Positioning chamber; 22. Face cover; 23. Flip cover; 231. Drive end; 232. 1. Movable end; 2. Pushing part; 3. Solenoid valve; 4. Locking tongue; 4. Protrusion; 4. Mounting groove; 4. Slide groove; 5. First return spring; 6. Pin; 6. Slot; 6. First shaft; 6. Second shaft; 6. Pressing surface; 7. Second return spring; 8. Movable groove; 8. Positioning block; 9. Limiting plate; 10. Hinge shaft; 20. Buffer pad; 30. Micro switch; 40. Circuit board; 401. Power cord; 402. Wire. Detailed Implementation

[0028] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, in this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0032] like Figure 1-14As shown, a fuel tank lock includes a base 1 and a fuel tank cap assembly 2 mounted on the base 1. The base 1 is mounted on a motorcycle; this part is prior art and will not be described in detail. The fuel tank cap assembly 2 includes a lock body seat 21, a face cover 22, and a flip cover 23. The lock body seat 21 and the face cover 22 are fixedly connected to form an installation chamber. The lock body seat 21 and the face cover 22 can be connected by screws, snap-fit ​​connections, or threaded connections, etc., to facilitate the maintenance and replacement of internal components. The installation chamber is equipped with a solenoid valve 3 and a locking tongue 4. The face cover 22 is hinged to the base 1, and the flip cover 23 is hinged to the face cover 22. When the flip cover 23 rotates relative to the face cover 22, it can drive the locking tongue 4 to slide in the unlocking direction. The installation chamber is also equipped with a drive mechanism. The locking tongue 4 is reset by a first return spring 5 in the upward locking direction. The mounting chamber also contains a pin 6 and a micro switch 30. The micro switch and solenoid valve can be connected to the control module on the motorcycle via a power cord, or a circuit board can be installed in the mounting chamber, with the micro switch and solenoid valve electrically connected to the circuit board, which in turn is connected to the control module on the motorcycle via a power cord. The pin 6 and locking tongue 4 are separate components. The locking tongue 4 has a protrusion 41, and the front end face of the pin 6 is flush with the front end face of the protrusion 41. When the flip cover 23 rotates relative to the face cover 22, it can drive the locking tongue 4 and the pin 6 to slide simultaneously in the unlocking direction. The front end face refers to the end face closer to the locking direction. The flush setting does not necessarily require complete flushing, as long as the pin 6 can be driven when the flip cover rotates. The pin 6 can slide synchronously with the latch. The pin 6 can be matched with the solenoid valve 3 for limiting. When the flip cover 23 slides under the drive, the pin 6 can trigger the micro switch 30 to drive the solenoid valve 3 and the pin 6 to release the limiting. The mounting cavity is also equipped with a second return spring 7 to drive the pin 6 to return to the upward locking direction. When the cover 22 is closed relative to the base 1, the latch 4 can slide independently relative to the pin 6 in the unlocking direction. A limiting block 11 can be provided on the base 1. The upper end of the limiting block 11 is inclined. The end of the latch has a bevel or arc surface. When the cover 22 is closed relative to the base 1, it is convenient for the latch 4 to be embedded under the limiting block 11 to achieve locking. Alternatively, a lock slot can be provided on the base. The end of the latch is inserted into the lock slot to achieve locking. The matching relationship between the lock slot and the latch can be referred to as a door lock. The locking tongue and the limiting block or locking jaw form a locking structure. When the fuel tank cap needs to be opened, the flip cover is rotated. The flip cover pushes against the locking tongue and the pin, causing the locking tongue and the pin to slide in the unlocking direction within the mounting cavity. During the sliding process, the pin will press the contact of the micro switch, which will conduct and transmit the signal directly to the control module or through the circuit board. The control module controls the solenoid valve to operate, the output end of the solenoid valve retracts, and the limiting between the solenoid valve and the pin is released. The pin and the locking tongue can continue to slide in the unlocking direction until the locking tongue is unlocked from the base. At this point, the cover is unlocked, and the cover can be flipped relative to the base to open the fuel tank cap for refueling. When the cover is in the open state, if the flip cover is released, the first and second return springs will activate.When the latch and pin are reset to the upward locking direction, the pin separates from the microswitch contact. The control module receives the signal and controls the solenoid valve. The solenoid valve engages with the pin at a limit position, preventing the pin from sliding. However, if the cover is rotated downwards, the latch can slide independently in the unlocking direction within the mounting cavity. Ultimately, the latch can be inserted from above the limit block to below the limit block or locked into the lock slot, effectively locking the cover and preventing damage to the latch.

[0033] Specifically, the solenoid valve 3 and the micro switch 30 are respectively located on both sides of the pin 6. The pin 6 has a slot 61 and an obliquely arranged pressing surface 64 on both sides. The slot 61 is in a limiting fit with the solenoid valve 3. When the flip cover 23 slides under driving force, the pressing surface 64 on the pin 6 presses against the contact of the micro switch 30 to conduct the circuit, thereby driving the solenoid valve 3 to release the limiting fit from the pin 6. When the flip cover 23 slides under driving force, the obliquely arranged pressing surface 64 of the pin 6 gradually presses against the contact of the micro switch 30 to conduct the circuit, thereby driving the solenoid valve 3 to act, converting the mechanical movement of the flip cover 23 into an electrical signal, realizing the intelligent control of the fuel tank lock. The oblique pressing surface 64 and the contact of the micro switch 30 are in progressive contact, which can avoid rigid impact damage to the micro switch 30. At the same time, by adjusting the inclination and length of the pressing surface 64, the timing of circuit conduction can be precisely controlled to match the opening / closing stroke of the flip cover 23 and improve system coordination.

[0034] An elastic pad 213 is fitted onto the lower end of the lock body seat 21. A drive spring 214 is provided between the elastic pad 213 and the bottom surface of the lock body seat 21. During the flip-top 23 relative to the face cover 22, the drive spring 214 can drive the lock body seat 21 to spring upward relative to the base 1 to unlock. During the flip-top 23 relative to the face cover 22 opening process, the drive spring 214 uses its elastic force to drive the lock body seat 21 to spring upward relative to the base 1, thereby causing the bolt 4 to automatically disengage from the base 1, realizing the smooth opening of the oil tank lock. Unlocking requires only a forceful flip of the cover 23, making it more effortless. An elastic pad 213, fitted at the lower end of the lock body seat 21, absorbs the impact force of the return spring 214, reducing rigid collisions between metal parts, lowering operating noise, and protecting the lock body seat 21 and base 1 from wear. The elastic pad 213 itself has a certain sealing function, preventing external dust and moisture from entering the lock body from the lower end of the lock body seat 21, improving the environmental adaptability and service life of the fuel tank lock. The bottom of the lock body seat 21 is provided with... The lock body 21 has a mounting post 215 and several positioning chambers 216 located on the outer periphery of the mounting post 215. The elastic pad 213 is sleeved on the mounting post 215. Each positioning chamber 216 is equipped with a drive spring 214, and the lower end of the drive spring 214 abuts against the elastic pad 213. By setting multiple positioning chambers 216 at the bottom of the lock body 21, and installing an independent drive spring 214 in each chamber, the elastic force is evenly distributed along the circumference. When the lock body 21 is driven to open upward, it is more stable and without deviation, avoiding jamming due to unilateral force. The mounting post 215 is used to sleeve the elastic pad 213, which can ensure that the elastic pad 213 is always in the center position and prevent displacement. Each positioning chamber 216 radially limits the drive spring 214 to prevent the spring from bending or falling out during compression or release, improving structural stability and assembly consistency. Multiple drive springs 214 work together. Even if one spring fails, the remaining springs can still provide enough elastic force to complete the unlocking action, enhancing the fault tolerance and long-term reliability of the system.

[0035] The mounting cavity is provided with a U-shaped movable groove 8. The latch 4 can also be U-shaped. The latch 4 slides within the movable groove 8. The front end face of the movable groove 8 has a slot 211 for the front end of the latch 4 to extend out of the mounting cavity. The latch 4 is provided with a mounting groove 42. A positioning block 81 is provided within the movable groove 8. The positioning block 81 extends into the mounting groove 42. The first return spring 5 is installed within the mounting groove 42, and both ends of the first return spring 5 abut against the positioning block 81 and the side wall of the mounting groove 42, respectively. The U-shaped movable groove 8 provides precise sliding guidance for the latch 4, restricts the sliding direction of the latch 4, and prevents the latch 4 from sliding out of control. The locking mechanism prevents offset and jamming, ensuring that the latch 4 can be accurately aligned with the slot 211, thus improving the reliability of locking and unlocking. The mounting slot 42 on the latch 4 cooperates with the positioning block 81 in the movable slot 8. On the one hand, it provides an additional limiting effect on the latch 4, further preventing the latch 4 from offset. On the other hand, it provides a stable mounting space for the first return spring 5, so that the two ends of the first return spring 5 can stably abut against the positioning block 81 and the side wall of the mounting slot 42, ensuring that the elastic force of the return spring is uniform, driving the latch 4 to return smoothly, avoiding the failure of return due to loose spring installation, and also reducing the deformation of the spring after long-term use, extending the service life of the spring, and thus improving the overall durability of the fuel tank lock.

[0036] The locking tongue 4 has a groove 43 in the middle. Two protrusions 41 are provided on both sides of the groove 43. The pin 6 is partially located in the groove 43. The groove 43 and the pin 6 are guided and slidably engaged to provide sliding guidance for the locking tongue 4 and prevent the locking tongue 4 from deviating or tilting during sliding. The two protrusions 41 are respectively provided on both sides of the groove 43. On the one hand, they can limit the pin 6 and prevent the pin 6 from coming out of the groove 43, thus improving the stability of the engagement. On the other hand, they can increase the contact area between the pin 6 and the locking tongue 4, so that the driving force applied by the flip cover 23 can be evenly transmitted to the locking tongue 4 and the pin 6, avoiding wear or jamming of components caused by unilateral force, and extending the service life of the locking tongue 4 and the pin 6. Limiting plates 9 are provided on both sides of the pin 6 in the installation cavity. Specifically, the limiting plates 9 are located in the movable groove 8. The pin 6 slides between the two limiting plates 9, which can play a guiding role.

[0037] The mounting chamber is equipped with a detachable mounting box 212, which is installed in the lock body seat by screws. The solenoid valve 3, micro switch 30, and second return spring 7 are all located in the mounting box 212. The mounting box 212 also contains a circuit board 40. The solenoid valve 3 and micro switch 30 are electrically connected to the circuit board 40. The electrical connection can be through a wire 402 or through contact with the conductive area of ​​the circuit board 40. In this invention, the solenoid valve 3 is connected to the circuit board 40 through the wire 402, and the micro switch 30 is directly soldered to the circuit board 40. The pin 6 includes a first shaft 62 and a second shaft that are separately set. The first shaft 62 has one end extending into the mounting box 212 and the other end connected to the second shaft 63. The first shaft can be connected to the second shaft via a connector, a snap-fit ​​connection, or direct end-to-end contact. In this invention, the ends of the first shaft and the second shaft are positioned in contact. A sealing ring is provided on the first shaft 61 to ensure a sealed fit between the first shaft and the through hole on the mounting box, preventing dust and moisture from entering the mounting box. The second return spring 7 abuts against the side wall of the mounting box 212 and the end of the first shaft 62. A connecting part can be provided on the first shaft, and the second return spring can be sleeved on the connecting part. The device includes a recessed cavity, within which the second return spring is located. The front end face of the second shaft 63 is flush with the protrusion 41. The mounting box 212 provides independent mounting space for the solenoid valve 3 and the second return spring 7, separating them from the sliding area of ​​the latch 4. This prevents interference between the latch 4 and the solenoid valve 3 and spring during sliding, while also preventing dust and impurities from contacting the solenoid valve 3, ensuring its normal operation and reducing the failure rate. The pin 6 is constructed with separate first shaft 62 and second shaft 63, facilitating component assembly and disassembly, reducing production and maintenance costs. If one shaft is damaged, it can be replaced individually. Replacement is possible without replacing the entire pin 6, improving maintenance convenience; the second return spring 7 abuts against the side wall of the mounting box 212 and the end of the first shaft 62, ensuring a stable installation and providing a continuous and uniform return force for the pin 6, ensuring that the pin 6 quickly returns to its original position after unlocking, and cooperates with the locking tongue 4 to achieve subsequent locking, while avoiding locking failures caused by the pin 6 not returning to its original position; the end of the second shaft 63 and the protrusion 41 of the locking tongue 4 are on the same horizontal line, ensuring that when the flip cover 23 rotates, it can simultaneously and accurately push the locking tongue 4 and the pin 6 to slide, ensuring that the two movements are synchronized, avoiding one-sided jamming, and further improving the smoothness and reliability of unlocking.

[0038] The mounting box 212 includes a separate box body 2121, a box cover 2122, and a pressure plate 2123. The box cover and the box body can be ultrasonically welded to improve the sealing of the mounting box. The box body 2121 has a first mounting area 2124, a second mounting area 2125, and a third mounting area 2126 that are interconnected. The solenoid valve 3 is located in the first mounting area 2124, and the output shaft of the solenoid valve 3 can enter and exit the second mounting area 2125. The second return spring 7 and part of the pin 6 are movably located in the second mounting area 2125. The micro switch 30 and the circuit board 40 are located in the third mounting area 2126. The micro switch 30... The contact extends into the second mounting area 2125. The pressure plate 2123 is located above the second mounting area 2125 and the third mounting area 2126. The circuit board 40 is provided with a power line 401 for external connection. The power line 401 is located above the pressure plate 2123 and extends out of the mounting box 212 to the base 1. The box body 2121, the cover 2122, and the pressure plate 2123 adopt a split structure and can be processed and assembled independently. When repairing or replacing internal components such as the solenoid valve 3, the micro switch 30, and the circuit board 40, only the corresponding cover or pressure plate 2123 needs to be removed without damaging the entire mounting box 212, thus reducing maintenance costs. Cost and difficulty: The split structure allows for individual precision control of each component, flexible assembly sequence, reduced cumulative tolerances that may arise from one-piece molding, and improved product yield. The first mounting area 2124 is dedicated to the solenoid valve 3, the second mounting area 2125 is for mechanical moving parts (pin 6, return spring), and the third mounting area 2126 is for electrical parts (micro switch 30, circuit board 40). The three areas are interconnected, allowing the output shaft of the solenoid valve 3 to enter the second area to lock the pin 6. At the same time, the contacts of the micro switch 30 can also extend into the second area to detect the position of the pin 6, achieving mechatronic integration. By arranging components with different functions in interconnected but not monolithic areas... Within relatively independent areas, the increased volume caused by dispersed layout is avoided, allowing the entire lock body to be integrated into a smaller base 1, which is suitable for installation in narrow oil tank spaces. Although each area is interconnected, the space size of each area is sufficient to accommodate the corresponding components. Through isolation measures such as pressure plate 2123, it is ensured that there will be no physical jamming or short circuit between the movement of solenoid valve 3, the sliding of pin 6, and the triggering of micro switch 30. Pressure plate 2123 is located above the second and third installation areas 2126, which can longitudinally limit the pin 6 and the second return spring 7 in the second area and the micro switch 30 and circuit board 40 in the third area to prevent them from jumping out during vibration or movement.Meanwhile, the pressure plate 2123 serves as an isolation layer, preventing the upper power line 401 from directly pressing against the lower sensitive element. The power line 401 is positioned on the pressure plate 2123, completely isolating it from the moving parts (pin 6, second return spring 7) in the lower second mounting area 2125 and the microswitch 30 contacts in the third mounting area 2126. This prevents the wire from being pinched, worn, or obstructing mechanical movement. The power line 401 extends directly to the outside of the base 1, allowing for quick connection to the vehicle's main circuit or fuel tank cap detection system.

[0039] The flip cover 23 has a driving end 231 at one end and a movable end 232 at the other end. The movable end 232 is mounted on the cover 22 via a hinge shaft 10. The lower end face of the movable end 232 has a pushing part 233, which pushes the latch 4 and pin 6 to slide when the flip cover 23 is flipped, allowing the flip cover 23 to rotate flexibly around the hinge shaft 10, reducing rotational resistance and making operation easier. The pushing part 233 on the lower end face of the movable end can precisely push the latch 4 and pin 6 to slide when the flip cover 23 is flipped, achieving unlocking. The pushing part 233 increases the contact area between the flip cover 23 and the latch 4 and pin 6, making the driving force transmission more even and avoiding excessive local force leading to component wear. It also ensures accurate and smooth unlocking, preventing jamming. The driving end 231 provides users with convenient... With a convenient application point, users only need to press or flick the drive end 231 to flip the cover 23, achieving one-click unlocking. The operation is simple and convenient, solving the problems of laborious and cumbersome unlocking of traditional fuel tank locks and improving the user experience. The cover 22 is provided with a buffer pad 20 near the drive end 231. The cover 23 is placed on the buffer pad 20 to increase the distance between the drive end 231 and the cover 22, so that there is a large gap between the cover 23 and the cover 22. This makes it easier for users to put their hands into the gap to drive the cover 23 to rotate and generate noise. The buffer pad 20 can reduce the entry of dust and rainwater into the installation chamber from the gap between the drive end 231 and the cover 22, protecting the internal components and further improving the sealing and durability of the fuel tank lock. At the same time, it can also reduce the impact noise when the cover 23 closes, improving the user experience.

Claims

1. A fuel tank lock, comprising a base (1) and a fuel tank cover assembly (2) disposed on the base (1), the fuel tank cover assembly (2) comprising a lock body seat (21), a face cover (22) and a flip cover (23), the lock body seat (21) and the face cover (22) being fixedly connected to form an installation chamber, the installation chamber being provided with a solenoid valve (3) and a latch (4), the face cover (22) being hinged to the base (1), the flip cover (23) being hinged to the face cover (22), the flip cover (23) being able to drive the latch (4) to slide in the unlocking direction when rotating relative to the face cover (22), the installation chamber also being provided with a first return spring (5) for driving the latch (4) to return to the locking direction, characterized in that, The mounting chamber is also equipped with a pin (6) and a micro switch (30). The pin (6) and the latch (4) are separately arranged. The latch (4) is provided with a protrusion (41). The front end face of the pin (6) is flush with the front end face of the protrusion (41). When the flip cover (23) rotates relative to the cover (22), it can drive the latch (4) and the pin (6) to slide simultaneously in the unlocking direction. The pin (6) can be limited by the solenoid valve (3). When the pin (6) slides under the drive of the flip cover (23)... A micro switch (30) can be triggered to drive the solenoid valve (3) and the pin (6) to release the limit. The mounting chamber is also provided with a second return spring (7) to drive the pin (6) to return to the upward locking direction. When the cover (22) is closed relative to the base (1), the locking tongue (4) can slide independently relative to the pin (6) in the unlocking direction. The solenoid valve (3) and the micro switch (30) are respectively located on both sides of the pin (6). The pin (6) is provided with a slot (61) and an obliquely arranged pressing surface (64) on both sides. The slot (61) is in a limiting fit with the solenoid valve (3). When the pin (6) slides under the drive of the flip cover (23), the pressing surface (64) on the pin (6) presses against the contact of the micro switch (30) to connect the circuit, thereby driving the solenoid valve (3) to release the limiting fit with the pin (6). The mounting cavity is provided with a convex-shaped movable groove (8). The locking tongue (4) slides in the movable groove (8). The locking tongue (4) is provided with a mounting groove (42). The movable groove (8) is provided with a positioning block. 81), the positioning block (81) extends into the mounting groove (42), the first return spring (5) is installed in the mounting groove (42), and the two ends of the first return spring (5) abut against the positioning block (81) and the side wall of the mounting groove (42) respectively. The middle part of the locking tongue (4) is provided with a sliding groove (43), the protrusion (41) is provided with two protrusions and is respectively provided on both sides of the sliding groove (43), the pin (6) is located in the sliding groove (43), and the sliding groove (43) and the pin (6) are guided and slidably engaged.

2. The fuel tank lock according to claim 1, characterized in that, An elastic pad (213) is fitted at the lower end of the lock body seat (21). A drive spring (214) is provided between the elastic pad (213) and the bottom surface of the lock body seat (21). During the flip-top (23) flipping relative to the face cover (22), the drive spring (214) can drive the lock body seat (21) to spring upward relative to the base (1) to unlock.

3. The fuel tank lock according to claim 2, characterized in that, The bottom of the lock body seat (21) is provided with a mounting post (215) and a number of positioning chambers (216) located on the outer periphery of the mounting post (215). The elastic pad (213) is sleeved on the mounting post (215). Each positioning chamber (216) is equipped with the drive spring (214), and the lower end of the drive spring (214) abuts against the elastic pad (213).

4. The fuel tank lock according to claim 1, 2, or 3, characterized in that, The mounting chamber is provided with a detachable mounting box (212). The solenoid valve (3), micro switch (30) and second return spring (7) are all located in the mounting box (212). The mounting box is provided with a circuit board (40). The solenoid valve (3) and micro switch (30) are electrically connected to the circuit board (40). The rear end of the pin (6) extends into the mounting box (212). The second return spring (7) abuts against the side wall of the mounting box (212) and the rear end face of the pin (6).

5. The fuel tank lock according to claim 4, characterized in that, The mounting box (212) includes a separate box body (2121), a box cover (2122), and a pressure plate (2123). The box body (2121) has a first mounting area (2124), a second mounting area (2125), and a third mounting area (2126) that are interconnected. The solenoid valve (3) is located in the first mounting area (2124), and the output shaft of the solenoid valve (3) can enter and exit the second mounting area (2125). The second return spring (7) and part of the pin (6) are movably located in the second mounting area (2126). 5) Inside, the micro switch (30) and the circuit board (40) are located in the third mounting area (2126). The contacts of the micro switch (30) extend into the second mounting area (2125). The pressure plate (2123) is located above the second mounting area (2125) and the third mounting area (2126). The circuit board (40) is provided with a power line (401) connected to the outside. The power line (401) is located above the pressure plate (2123). The power line (401) extends out of the mounting box (212) and out of the base (1).

6. The fuel tank lock according to claim 1, 2, or 3, characterized in that, One end of the flip cover (23) is a drive end (231), and the other end is a movable end (232). The movable end (232) is mounted on the face cover (22) via a hinge shaft (10). The lower end face of the movable end (232) is provided with a push part (233) so that when the flip cover (23) is flipped, the push part (233) pushes the locking tongue (4) and the pin (6) to slide.

7. The fuel tank lock according to claim 6, characterized in that, A buffer pad (20) is provided on the face cover (22) near the drive end (231), and the flip cover (23) is placed on the buffer pad (20) to increase the distance between the drive end (231) and the face cover (22).

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