Dual release latch

Abstract

The invention discloses a double-release latch which comprises a base, a lock body, a key, a lock cylinder, a first torsional spring, a shifting button and a locking block. The middle section of the lock body is hinged to the locking groove through a first hinge shaft, and a locking part is arranged at the inner end of the lock body; the middle section of the key is hinged to the outer end of the lock body through a second hinge shaft, and a first buckling part and a second buckling part are arranged at the inner end of the key; the lock cylinder is arranged at the outer end of the lock body, and a first buckling groove is formed in the inner end of the lock cylinder. The first torsional spring sleeves the first hinge shaft, one end of the first torsional spring abuts against the base, and the other end of the first torsional spring abuts against the lock body; the shifting button is arranged on the inner side of the base, the locking block is arranged in the locking groove and connected with the shifting button, and a second buckling groove is formed in the locking block; through two sets of mutually independent mechanisms of external unlocking and internal unlocking, the external unlocking and the internal unlocking do not interfere with each other, the internal unlocking operation is not limited by the locking state of the lock cylinder, unlocking can be achieved by operating the internal shifting button, and it is ensured that an escape channel of internal personnel is always unblocked under the emergency situation.

Description

Technical Field

[0001] This invention relates to the field of locks, and particularly to a double-release latch. Background Technology

[0002] In the application of locks on vehicle doors, tailgates, and various equipment compartment doors of automobiles, RVs, and special-purpose vehicles, latches, as the core component for locking and unlocking the door and its base, directly affect user safety and user experience in terms of security and convenience. Currently, most mainstream latch products on the market only have external unlocking functions, that is, unlocking is achieved from the outside of the door through a key, external button, etc., without a corresponding internal unlocking structure.

[0003] In practical use, such single-unlocking latches pose significant safety hazards: when people (especially children, the elderly, or unconscious individuals) are accidentally left in enclosed spaces such as vehicle doors or tailgates, they cannot unlock themselves and escape because the unlocking mechanism cannot be triggered from the inside. They may face extreme environmental threats such as lack of oxygen, high temperatures, or low temperatures, and may even cause serious personal injury accidents. In addition, in emergency situations (such as when a vehicle falls into water or catches fire), the external unlocking path may be blocked, and the lack of an internal unlocking channel further exacerbates the difficulty of rescue and the risk of casualties. The existing single-unlocking design of latches can no longer meet the core requirements of vehicles and various cabin doors for safe escape functions. There is an urgent need for a dual-release latch with both external and internal unlocking functions to fill the gap in existing technology. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a double-release latch.

[0005] One embodiment of the present invention provides a technical solution to solve its technical problem: a double release latch, comprising a base, a lock body, a button, a lock cylinder, a first torsion spring, a toggle switch, and a locking block; The base is provided with a locking groove with an open outer side, and the base is used to be installed on the first base; The middle section of the lock body is hinged to the locking groove via the first hinge shaft and has a locked state and an unlocked state. The inner end of the lock body is provided with a locking part. The middle section of the button is hinged to the outer end of the lock body via a second hinge shaft, and a first latching part and a second latching part are provided on its inner end. The lock cylinder is located on the outer end of the lock body and has a first latching groove on its inner end; The first torsion spring is sleeved on the first hinge shaft, with one end abutting against the base and the other end abutting against the lock body; The toggle switch is located on the inside of the base and has a locked position and an unlocked position. The locking block is located in the locking groove and connected to the toggle switch. The locking block is provided with a second latching groove. When the toggle switch is in the locked position, the second latching part engages with the second latching groove. The first latching part can abut against the outer wall of the lock cylinder when the lock cylinder is locked to restrict the rotation of the button and keep the lock body in the locked state so that the locking part is locked with the second base. Alternatively, the first latching part can engage with the first latching groove when the lock cylinder is unlocked. When the button is rotated to the point that the second latching part separates from the second latching groove, the lock body rotates outward under the action of the first torsion spring to the unlocked state so that the locking part is separated from the second base. When the lock cylinder is locked or unlocked and the dial is in the unlocked position, the second latching part separates from the second latching groove, and the lock body rotates outward under the action of the first torsion spring to the unlocked state, so that the locking part separates from the second base.

[0006] As one of the preferred embodiments of the present invention, a second torsion spring is provided in the locking groove. One end of the second torsion spring abuts against the locking block and the other end abuts against the base, which is used to provide a reverse rotation driving force for the locking block so that the dial switches from the unlocked position to the locked position.

[0007] In one of the preferred embodiments of the present invention, the second torsion spring is locked in the locking groove by the first bolt.

[0008] As one of the preferred embodiments of the present invention, the second fastening part is provided with a guide slope that abuts against the locking block.

[0009] As one of the preferred embodiments of the present invention, the base is provided with a through groove that extends through both the inside and outside, and the locking block passes through the through groove and is connected to the toggle switch.

[0010] As one of the preferred embodiments of the present invention, a waterproof groove is provided on the locking block, and a waterproof ring is provided inside the waterproof groove. The waterproof ring can abut against the outer end face of the through groove when the locking block is inserted into the through groove.

[0011] In one of the preferred embodiments of the present invention, the locking block is connected to the toggle switch by a second bolt.

[0012] As one of the preferred embodiments of the present invention, a double release latch further includes a fixing sleeve and a third bolt, the third bolt being locked onto the fixing sleeve, the first base and the base.

[0013] As one of the preferred embodiments of the present invention, a rubber pad is provided between the fixing sleeve and the base.

[0014] As one of the preferred embodiments of the present invention, an unlocking mark is provided on the inner side of the toggle or the base to indicate the unlocking direction.

[0015] The beneficial effects of the present invention are as follows: A double-release latch includes a base, a lock body, a button, a lock cylinder, a first torsion spring, a toggle switch, and a locking block; the base is provided with a locking groove with an open outer side, and the base is used to be mounted on a first base; the middle section of the lock body is hinged to the locking groove through a first hinge axis and has a locked state and an unlocked state, and the inner end of the lock body is provided with a locking part; the middle section of the button is hinged to the outer end of the lock body through a second hinge axis, and its inner end is provided with a first latching part and a second latching part; the lock cylinder is located on the outer end of the lock body and its inner end is provided with a locking part. It has a first latching groove; a first torsion spring is sleeved on a first hinge shaft with one end abutting against the base and the other end abutting against the lock body; a dial is located inside the base and has a locked position and an unlocked position; a locking block is located in the locking groove and connected to the dial; the locking block is provided with a second latching groove; the above structure enables two independent mechanisms for external unlocking and internal unlocking, which do not interfere with each other, and the internal unlocking operation is not restricted by the locked state of the lock cylinder. Unlocking can be achieved by operating the internal dial, ensuring that the escape route for internal personnel is always unobstructed in an emergency. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the first structure of a double-release latch in the locked state; Figure 2 This is a schematic diagram of the second structure of a double-release latch in the locked state; Figure 3 A schematic diagram of the first structure of a double-release latch in the unlocked state; Figure 4 This is a schematic diagram of the second structure of a double-release latch in the unlocked state; Figure 5 An exploded view of a double-release latch; Figure 6 This is a cross-sectional view of a double-release latch. Detailed Implementation

[0017] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0018] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] Reference Figures 1-6 A double-release latch includes a base 10, a lock body 20, a button 30, a lock cylinder 40, a first torsion spring 51, a toggle switch 60, and a locking block 70; The base 10 is provided with a locking groove 11 with an open outer side, and the base 10 is used to be installed on the first base; The middle section of the lock body 20 is hinged to the locking groove 11 via the first hinge shaft 52 and has a locked state and an unlocked state. The inner end of the lock body 20 is provided with a locking part 21. The middle section of the button 30 is hinged to the outer end of the lock body 20 via the second hinge shaft 53, and the inner end of the button 30 is provided with a first fastening part 31 and a second fastening part 32. The lock cylinder 40 is located on the outer end of the lock body 20 and has a first latching groove 41 on its inner end; The first torsion spring 51 is sleeved on the first hinge shaft 52, with one end abutting against the base 10 and the other end abutting against the lock body 20; The dial 60 is located inside the base 10 and has a locking position and an unlocking position. The locking block 70 is located in the locking groove 11 and connected to the dial 60. The locking block 70 is provided with a second latching groove 71. When the toggle switch 60 is in the locked position, the second latching part 32 engages with the second latching groove 71. The first latching part 31 can abut against the outer wall of the lock cylinder 40 when the lock cylinder 40 is locked to restrict the rotation of the button 30, so that the lock body 20 is in the locked state, so that the locking part 21 is locked with the second base; or, the first latching part 31 can engage with the first latching groove 41 when the lock cylinder 40 is unlocked. The button 30 is rotated until the second latching part 32 separates from the second latching groove 71. Under the action of the first torsion spring 51, the lock body 20 rotates outward to the unlocked state, so that the locking part 21 is separated from the second base. When the lock cylinder 40 is locked or unlocked and the dial 60 is in the unlocked position, the second latching part 32 separates from the second latching groove 71, and the lock body 20 rotates outward under the action of the first torsion spring 51 to be in the unlocked state, so that the locking part 21 separates from the second base.

[0022] Reference Figures 1-6 A double-release latch includes a base 10, a lock body 20, a button 30, a lock cylinder 40, a first torsion spring 51, a toggle switch 60, and a locking block 70. The base 10 serves as the mounting base for the latch and is integrally stamped from high-strength aluminum alloy or sheet metal, resulting in a stable structure and lightweight design. It is provided with an outer-opening locking groove 11, the groove shape of which is adapted to the middle section of the lock body 20, providing precise limiting for the rotation of the lock body 20. The base 10 is used to install on a first base (such as the mounting frame of a car door or tailgate, or the fixed frame of an equipment compartment door), and forms a stable connection with the first base through multiple sets of mounting holes.

[0023] The lock body 20 is made of wear-resistant alloy steel. The middle section is hinged to the locking groove 11 through the first hinge shaft 52. The first hinge shaft 52 is made of stainless steel and is fixed at both ends by snap rings or threads to ensure that the lock body 20 can rotate flexibly around the first hinge shaft 52 without axial movement. The lock body 20 has a locked state and an unlocked state. Its outer end extends to the outside of the base 10, and the inner end is provided with a locking part 21. The locking part 21 is designed as a hook structure, which forms a locking engagement with the groove of the second base (such as the body latch, the door lock seat, etc.). The locking surface is hardened to improve wear resistance and locking reliability.

[0024] The button 30 is made of engineering plastic or lightweight alloy. Its middle section is hinged to the outer end of the lock body 20 via the second hinge shaft 53. The second hinge shaft 53 and the hinge hole of the button 30 are fitted with a clearance to ensure smooth rotation of the button 30. The inner end of the button 30 has a first latching part 31 and a second latching part 32 integrally formed. The two are distributed at an angle and respectively cooperate with the first latching groove 41 of the lock cylinder 40 and the second latching groove 71 of the locking block 70. The outer end of the button 30 is designed with an arc-shaped pressing surface to increase the pressing contact area and improve the operating comfort.

[0025] The lock cylinder 40 adopts a standard anti-theft lock cylinder structure and is fixed in the reserved installation hole at the outer end of the lock body 20. The inner end of the lock cylinder 40 extends into the interior of the lock body 20 and is provided with a first latching groove 41. The first latching groove 41 is adapted to the shape of the first latching part 31 to ensure stable transmission after the two are engaged. The outer end of the lock cylinder 40 protrudes from the lock body 20 and can be used to insert and rotate the key to switch between locking and unlocking. Its internal tumbler structure can effectively prevent illegal opening and ensure anti-theft performance.

[0026] The first torsion spring 51 is sleeved on the first hinge shaft 52. It is made of high-strength spring steel and has good elastic recovery performance. One end of it is positioned and abutted by the limiting groove on the base 10, and the other end is embedded in the slot of the lock body 20 and abutted. In its natural state, the first torsion spring 51 always applies an outward rotation elastic driving force to the lock body 20, so that the lock body 20 has the tendency to unlock automatically. Only when it is locked, its rotation is restricted by the buckling structure.

[0027] Reference Figures 2-3 , Figures 5-6 In some embodiments, the toggle switch 60 is located on the inner side of the base 10, made of non-slip plastic or rubber, with raised stripes on the surface for easy gripping and operation. The toggle switch 60 has a locking position and an unlocking position, and is fixedly connected to the locking block 70 by the second bolt 82. The locking block 70 is made of metal and is located in the locking groove 11. A second latching groove 71 is provided on its upper end surface. The edge of the second latching groove 71 is rounded to facilitate the smooth insertion or disengagement of the second latching part 32. Furthermore, the base 10 is provided with a through groove 12 that extends through both the inside and outside. The locking block 70 passes through the through groove 12 and is connected to the toggle switch 60. The lower end of the locking block 70 passes through the through groove 12 on the base 10 and is connected to the toggle switch 60. The size of the through groove 12 is slightly larger than the cross-section of the locking block 70, which provides sufficient space for the rotation of the locking block 70 and limits the swing amplitude of the locking block 70 through the groove wall, ensuring the fitting accuracy between the second latching groove 71 and the second latching part 32.

[0028] Reference Figures 4-6In some embodiments, a second torsion spring 54 is provided in the locking groove 11. One end of the second torsion spring 54 abuts against the locking block 70, and the other end abuts against the base 10. It is used to provide a reverse rotation driving force for the locking block 70 so that the dial 60 is switched from the unlocked position to the locked position. Further, the second torsion spring 54 is locked in the locking groove 11 by the first bolt 81. The second torsion spring 54 is also made of spring steel. One end of it is embedded in the limiting hole of the locking block 70 and abuts against it. The other end is fixed in the threaded hole of the base 10 by the first bolt 81 and abuts against it. The first bolt 81 also serves to fix the second torsion spring 54. The assembly is firm and easy to disassemble and maintain. In its natural state, the second torsion spring 54 always provides a reverse rotation driving force for the locking block 70. When the dial 60 is moved to the unlocked position and the dial 60 is released, the second torsion spring 54 can drive the locking block 70 to rotate in the opposite direction, so that the dial 60 automatically returns to the locked position. This ensures that the latch remains in a stable locked state during non-active unlocking operations and avoids accidental locking.

[0029] Reference Figure 3 , Figure 5 and Figure 6 In some embodiments, the second latching part 32 is provided with a guide slope 33 that abuts against the locking block 70. The inclination angle of the guide slope 33 is 30-45°. When the lock body 20 switches from the unlocked state to the locked state, the lock body 20 rotates inward and drives the button 30 to move synchronously. The guide slope 33 of the second latching part 32 first contacts and slides against the upper end surface of the locking block 70. Through the guiding force of the slope, the second latching part 32 smoothly squeezes the locking block 70 to rotate slightly until the second latching part 32 is completely inserted into the second latching groove 71. The entire locking process does not require additional operation of the dial 60, realizing automatic latching, avoiding latching jamming, and improving the smoothness of the locking operation.

[0030] Reference Figures 5-6 In some embodiments, the locking block 70 is provided with a waterproof groove 72, and a waterproof ring 73 is provided in the waterproof groove 72. The waterproof ring 73 can abut against the outer end face of the through groove 12 when the locking block 70 passes through the through groove 12. The waterproof ring 73 is made of aging-resistant and elastic rubber material, and its outer diameter is slightly larger than the aperture of the through groove 12. When the locking block 70 passes through the through groove 12, the waterproof ring 73 is squeezed between the waterproof groove 72 and the outer end face of the through groove 12 to form a tight annular sealing structure, which effectively prevents external rainwater, dust, mud and other impurities from entering the vehicle.

[0031] Reference Figures 1-6In some embodiments, a double-release latch further includes a fixing sleeve 90 and a third bolt 83. The third bolt 83 is locked onto the fixing sleeve 90, the first base, and the base 10. The fixing sleeve 90 is made of metal and has a ring or square structure. The third bolt 83 passes through the mounting holes of the fixing sleeve 90 and the first base in sequence and is threaded into the threaded hole of the base 10, thus achieving a firm fixation of the three. The fixing sleeve 90 increases the contact area between the base 10 and the first base, disperses the installation stress, and prevents the installation part from loosening due to vehicle vibration, door opening and closing collisions, etc. during long-term use, thereby improving the overall installation stability of the latch. A rubber pad 91 is provided between the fixing sleeve 90 and the base 10. The rubber pad 91 is made of elastic rubber with a thickness of 1-3mm. It can not only buffer the vibration transmission of the installation surface and reduce the abnormal noise of the latch during use, but also fill the assembly gap between the fixing sleeve 90 and the base 10, further enhancing the sealing of the installation part. Together with the waterproof ring 73 on the locking block 70, it forms a double waterproof protection.

[0032] Reference Figures 2-3 In some embodiments, an unlocking mark 92 is provided on the inner side of the toggle button 60 or the base 10. The unlocking mark 92 adopts a raised arrow or the word "unlock". The arrow direction is consistent with the unlocking rotation direction of the toggle button 60. It is made of fluorescent material or colored spraying treatment, so that it can be clearly identified in low light environment. This makes it convenient for people inside (especially children, the elderly or people who are panicked in an emergency) to quickly judge the operation direction of the toggle button 60, shorten the unlocking reaction time, and improve the convenience of escape.

[0033] The dual-release latch of this invention achieves precise control of locking and unlocking functions through two independent and non-interfering mechanisms: external unlocking and internal unlocking. Its specific working principle and operation process are as follows: I. Locking State Maintenance Principle and Initial Locking Procedure Initial locking operation: When closing the car door, tailgate, etc., rotate the lock body 20 inward around the first hinge axis 52, while compressing the first torsion spring 51, which accumulates elastic potential energy. During the rotation of the lock body 20, the button 30 moves synchronously. The second latching part 32 at the inner end of the button 30 slides against the locking block 70 through the guide slope 33. When the lock body 20 rotates to the limit position, the locking part 21 is fully engaged with the second base. At this time, the second latching part 32 is exactly aligned with the second latching groove 71 of the locking block 70, so that the second latching groove 71 and the second latching part 32 are tightly engaged, and the latch completes the initial locking.

[0034] Locking state retention: When the latch is in the locked state, the toggle switch 60 remains locked under the elastic driving force of the second torsion spring 54, and the second latching part 32 and the second latching groove 71 form a stable latching, restricting the rotation of the button 30; at the same time, when the lock cylinder 40 is in the locked state (unlocked without inserting a key), the outer wall of the lock cylinder 40 abuts against the end face of the first latching part 31, further restricting the rotation of the button 30 around the second hinge axis 53. Through double limiting, it is ensured that the lock body 20 cannot rotate around the first hinge axis 52, the locking part 21 and the second base remain firmly locked, and the door cannot be opened at will.

[0035] II. External unlocking working principle and operation procedure When it is necessary to unlock the door from the outside, follow these steps: Insert the key and turn the lock cylinder 40 to switch the lock cylinder 40 from the locked state to the unlocked state. The first latching groove 41 at the inner end of the lock cylinder 40 rotates to the position corresponding to the first latching part 31, releasing the resistance of the outer wall of the lock cylinder 40 to the first latching part 31. Press the button 30 on the outside by hand. The button 30 rotates around the second hinge axis 53. Its outer end retracts inward and its inner end lifts upward, causing the second latching part 32 to separate from the second latching groove 71 of the locking block 70, thereby releasing the restriction on the lock body 20. Under the action of the elastic driving force stored in the first torsion spring 51, the lock body 20 rotates outward around the first hinge axis 52, and the locking part 21 at the inner end of the lock body 20 separates from the second base, completing the external unlocking. At this time, the door can be opened outward smoothly. After unlocking, release button 30. Button 30 returns to its original position under its own weight or a slight elastic reset structure (such as a small reset spring, not shown). At the same time, the toggle switch 60, under the action of the second torsion spring 54, drives the locking block 70 to remain in the locked position, waiting for the next locking operation.

[0036] III. Internal unlocking working principle and operation procedure When someone is inside the door (e.g., accidentally trapped inside a vehicle) and needs to unlock it urgently, follow these steps: Internal personnel can quickly identify the unlocking direction by using the unlocking mark 92 on the dial 60, hold the dial 60 with their hand and turn it in the unlocking direction, and the dial 60 will drive the locking block 70 to rotate around its own axis, compressing the second torsion spring 54. During the rotation of the locking block 70, the second latching groove 71 on it rotates accordingly, gradually separating from the second latching part 32 of the button 30, releasing the restriction on the button 30 and the lock body 20. During this process, there is no need to pay attention to the state of the lock cylinder 40 (whether the lock cylinder 40 is in the locked or unlocked state, it will not affect the unlocking operation). Under the elastic driving force of the first torsion spring 51, the lock body 20 rotates outward around the first hinge axis 52, the locking part 21 separates from the second base, and the internal unlocking is completed. The personnel inside can directly push the door open and escape. After escaping, release the lever 60. The second torsion spring 54 releases its elastic potential energy, causing the locking block 70 to rotate in the opposite direction to the lever 60, automatically resetting to the locked position, ensuring that the latch can be locked normally again.

[0037] The advantages of this invention are as follows: by constructing two independent and non-interfering unlocking mechanisms, namely external unlocking (lock cylinder + button) and internal unlocking (toggle), the external unlocking is controlled by the lock cylinder authorization, which ensures the anti-theft performance of the latch and meets the security protection needs under normal use scenarios; the internal unlocking operation is simple and intuitive, not restricted by the lock cylinder locking state, ensuring that when people are trapped inside, they can quickly and autonomously unlock and escape, and ensuring that the escape route for people inside is always unobstructed in emergency situations.

[0038] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A double-release latch, characterized in that: Includes a base (10), a lock body (20), a button (30), a lock cylinder (40), a first torsion spring (51), a toggle switch (60), and a locking block (70); The base (10) is provided with a locking groove (11) with an open outer side, and the base (10) is used to be installed on the first base; The middle section of the lock body (20) is hinged to the locking groove (11) through the first hinge shaft (52) and has a locked state and an unlocked state. The inner end of the lock body (20) is provided with a locking part (21). The middle section of the button (30) is hinged to the outer end of the lock body (20) via the second hinge shaft (53), and a first fastening part (31) and a second fastening part (32) are provided on its inner end. The lock cylinder (40) is located on the outer end of the lock body (20) and a first latching groove (41) is provided on its inner end. The first torsion spring (51) is sleeved on the first hinge shaft (52) and one end abuts against the base (10) and the other end abuts against the lock body (20); The dial (60) is located inside the base (10) and has a locking position and an unlocking position. The locking block (70) is located in the locking groove (11) and connected to the dial (60). The locking block (70) is provided with a second latching groove (71). When the toggle switch (60) is in the locked position, the second latching part (32) engages with the second latching groove (71), and the first latching part (31) can abut against the outer wall of the lock cylinder (40) when the lock cylinder (40) is locked, so as to restrict the rotation of the button (30) and put the lock body (20) in the locked state, so that the locking part (21) is locked with the second base; or, the first latching part (31) can engage with the first latching groove (41) when the lock cylinder (40) is unlocked, and the button (30) is operated to rotate until the second latching part (32) separates from the second latching groove (71), and the lock body (20) rotates outward under the action of the first torsion spring (51) to be in the unlocked state, so that the locking part (21) is separated from the second base; When the lock cylinder (40) is locked or unlocked and the dial (60) is in the unlocked position, the second latching part (32) separates from the second latching groove (71), and the lock body (20) rotates outward under the action of the first torsion spring (51) to be in the unlocked state, so that the locking part (21) separates from the second base.

2. The double release latch according to claim 1, characterized in that: A second torsion spring (54) is provided in the locking groove (11). One end of the second torsion spring (54) abuts against the locking block (70) and the other end abuts against the base (10). It is used to provide a reverse rotation driving force for the locking block (70) so that the dial (60) is switched from the unlocked position to the locked position.

3. A double-release latch according to claim 2, characterized in that: The second torsion spring (54) is locked in the locking groove (11) by the first bolt (81).

4. A double-release latch according to claim 1, characterized in that: The second fastening part (32) is provided with a guide slope (33) that abuts against the locking block (70).

5. A double-release latch according to claim 1, characterized in that: The base (10) is provided with a through groove (12) that runs through the inside and outside. The locking block (70) passes through the through groove (12) and is connected to the toggle switch (60).

6. A double-release latch according to claim 5, characterized in that: The locking block (70) is provided with a waterproof groove (72), and a waterproof ring (73) is provided in the waterproof groove (72). The waterproof ring (73) can abut against the outer end face of the through groove (12) when the locking block (70) passes through the through groove (12).

7. A double-release latch according to claim 5, characterized in that: The locking block (70) is connected to the toggle switch (60) by a second bolt (82).

8. A double-release latch according to claim 1, characterized in that: It also includes a fixing sleeve (90) and a third bolt (83), which is locked onto the fixing sleeve (90), the first base and the base (10).

9. A double-release latch according to claim 8, characterized in that: A rubber pad (91) is provided between the fixing sleeve (90) and the base (10).

10. A double-release latch according to claim 1, characterized in that: An unlocking indicator (92) is provided on the inner side of the dial (60) or the base (10) to indicate the unlocking direction.

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