Self-locking handle structure for cabinet body and working method thereof

Abstract

The application discloses a self-locking handle structure for a cabinet body and a working method, and solves the problem of the existing technology that the lock hook is not resilient enough when the unlocking time is connected with the force, has the beneficial effect of directly exerting force to avoid the lock hook not being resilient enough and reduce the structure failure probability, and the specific scheme is as follows: a self-locking handle structure for a cabinet body, which comprises a shell connected with a cabinet door, at least one side of the shell supporting a rotating shaft, one side of the rotating shaft being arranged outside the shell, the one side of the rotating shaft being a square shaft, the other side being a round shaft, a fixed block being arranged on the inner side of a handle, the fixed block being sleeved on the round shaft, a push block being buckled with the fixed block, a lock hook being arranged at the square shaft of the rotating shaft, the lock hook being located on the outer side of the push block, the lock hook being provided with a recess portion to cooperate with a lock latch fixed to the cabinet body, a first elastic member being arranged between the lock hook and the shell, the two sides of the first elastic member being respectively limited by the lock hook and the shell, a second elastic member being arranged between the fixed block and the shell, the two sides of the second elastic member being respectively limited by the handle and the shell.

Description

Technical Field

[0001] This invention relates to the field of mechanical connection structures for cabinet structures, and in particular to a self-locking handle structure for cabinets and its working method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Door handles are commonly found in cabinet structures, typically featuring a self-locking function to keep the cabinet door locked. These handles are commonly found in products such as airline luggage compartments and doors, car trunk lids, and high-speed rail luggage compartments. Traditional handle structures are relatively complex, with many components. Most commonly, the vertical cross-section of the handle itself drives a lever, causing it to move in the opposite direction of the handle. This lever then drives the locking hook in the opposite direction (same direction as the lever). While this structure allows the handle to be opened, causing the locking hook to rotate and release the latch, thus locking and unlocking the cabinet door, the indirect force application makes it prone to insufficient hook rebound, leading to irreversible elastic deformation of the torsion spring and potential structural failure. Furthermore, the complexity makes maintenance and adjustment very difficult, requiring various tools and increasing manufacturing costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a self-locking handle structure for cabinets. This structure is simple, has few components, is less prone to poor rebound, is easy to maintain, and can be widely applied to various cabinet door structures.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A self-locking handle structure for a cabinet includes a housing connected to the cabinet door. At least one side of the housing supports a pivot, one side of which extends beyond the housing. One side of the pivot is a square shaft, and the other side is a round shaft. A fixing block is provided inside the handle, and the fixing block is fitted onto the round shaft. A lever is fitted onto the square shaft, and the lever engages with the fixing block. A locking hook is provided at the square shaft of the pivot, located outside the lever. The locking hook has a recess to engage with a latch fixed to the cabinet. A first elastic element is provided between the locking hook and the housing, with the locking hook and the housing limiting the two sides of the first elastic element respectively. A second elastic element is provided between the fixing block and the housing, with the handle and the housing respectively limiting the two sides of the second elastic element.

[0007] As described above, the locking hook is installed on the square shaft of the rotating shaft. Rotating the handle housing causes the fixed block to rotate relative to the round shaft of the rotating shaft. After rotating by a set angle, the fixed block contacts the lever block. The lever block drives the rotating shaft and the locking hook to rotate together, and the locking hook separates from the latch. Under external force, the locking hook can be hooked at the latch. Under the action of the first elastic element and the second elastic element, the locking hook is always engaged with the latch and remains in the locked state.

[0008] As described above, in a self-locking handle structure for a cabinet, considering that the fixing block needs to drive the lever block to rotate, the fixing block is provided with a first notch, and the lever block is provided with a second notch. The fixing block and the lever block are engaged through the first and second notches.

[0009] The first side of the first notch fits into the first side of the second notch, and the second side of the first notch fits into the second side of the second notch.

[0010] In the self-locking handle structure for a cabinet as described above, the widths of the first notch and the second notch are the same;

[0011] Both the first and second gaps are arc-shaped gaps.

[0012] As described above, in a self-locking latch structure for a cabinet, the housing supports the rotating shaft via a first support and a second support, with a distance between the first support and the second support, and the lever and the fixing block are located between the first support and the second support.

[0013] The first elastic element is located between the first support and the locking hook; the second elastic element is located between the second support and the lever block. The first and second supports can stably support the rotating shaft. The arrangement of the first and second supports facilitates the arrangement of the first and second elastic elements.

[0014] Both the first elastic element and the second elastic element are torsion springs.

[0015] As described above, a self-locking latch structure for a cabinet is provided with a first limiting block on the side of the first support facing the first elastic member to abut against one side of the first elastic member, and a second limiting block on the side of the locking hook facing the first elastic member to abut against the other side of the first elastic member, so that the housing and the locking hook are locked together after locking.

[0016] The second support is provided with a third limiting block on the side facing the second elastic member to abut against one side of the second elastic member, and the handle is provided with a fourth limiting block to abut against the other side of the second elastic member, so that the housing and the handle are locked together after locking.

[0017] As described above, in a self-locking latch structure for a cabinet, the latch is a U-shaped latch;

[0018] The cross-section of each side of the latch is circular.

[0019] As described above, a self-locking latch structure for a cabinet includes a hook that engages with the latch, a recess that engages with the latch, a first inclined surface on the side of the hook facing the latch, and a rounded transition at the connection between the first inclined surface and the recess.

[0020] The length of the locking hook is greater than the thickness of the cabinet door to ensure the proper fit between the hook and the latch.

[0021] As described above, in a self-locking latch structure for a cabinet, a baffle is provided on the outside of the locking hook on the pivot. The baffle is engaged with the pivot and is located on the outside of the locking hook to fix the locking hook.

[0022] As described above, a self-locking handle structure for a cabinet has a housing with a protrusion and a handle located on one side of the protrusion. The protrusion facilitates the installation of the handle on one side of the protrusion, and the shape of one side of the protrusion is consistent with the shape of the handle.

[0023] The housing is provided with several openings, through which fasteners are passed to connect the housing to the cabinet door. The self-locking handle structure can be replaced by removing the fasteners relative to the housing.

[0024] Secondly, the present invention also discloses a method for operating a self-locking handle structure for a cabinet, comprising the following:

[0025] Unlocking process: Relative to the cabinet door, turn the handle. The handle drives the lever to rotate, which in turn drives the pivot to rotate the lock hook. The lock hook separates from the latch, and the cabinet door opens.

[0026] Locking process: When the cabinet door is open, manually press the lower edge of the cabinet door, and the cabinet door will rotate towards the cabinet body. When the cabinet door rotates to the point where the outer side of the lock hook contacts the latch, continue to apply force to the cabinet door. At this time, the latch forces the lock hook to rotate away from the cabinet body. When the lock hook rotates past the lowest point of the hook, under the action of the first elastic element and the second elastic element, the lock hook rotates towards the cabinet body and hooks the latch, thus locking the cabinet door. When there is no manual operation, the handle and the lock hook will always be in the locked position under the action of the first elastic element and the second elastic element.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1) In this invention, the locking hook is installed at the square shaft of the rotating shaft. Rotating the handle housing causes the fixed block to rotate relative to the round shaft of the rotating shaft. After rotating at a set angle, the fixed block contacts the lever block, which drives the rotating shaft and the locking hook to rotate together, and the locking hook separates from the latch. The overall structure is reasonably designed, ensuring that the locking hook and the latch are engaged under normal conditions, so that the cabinet door is tightly closed. The locking hook and the latch work together effectively, and the latch can drive the locking hook to rotate away from the cabinet. The force is applied very directly, effectively avoiding the situation of insufficient rebound. Under the action of external force, the locking hook can be hooked at the latch. Under the action of the first elastic element and the second elastic element, the locking hook is always engaged with the latch, maintaining the locked state, effectively reducing the probability of structural failure and ensuring the normal use of the overall structure.

[0029] 2) The invention has a simple structure, which effectively controls manufacturing costs. By removing the shell relative to the cabinet door, maintenance and debugging can be achieved. After maintenance, the shell can be reinstalled on the cabinet door, which greatly facilitates maintenance. This design can be widely used on cabinet doors of various cabinet structures, and its application scenarios are quite extensive.

[0030] 3) The fixed block and the lever block in this invention are reasonably designed. The fixed block and the lever block are fastened together through the first notch and the second notch. Moreover, the fixed block and the lever block are spaced apart on one side to provide space for the handle to rotate relative to the housing. First, the handle drives the fixed block to rotate. After rotating to a set angle, the lever block drives the rotating shaft and the locking hook to rotate.

[0031] 4) The shell structure of the present invention is reasonably designed. The shell supports the rotating shaft through the first support and the second support. The first support and the second support are spaced apart, so that the locking hook and the first elastic element are located on one side of the first support, and the lever and the second elastic element are located between the first support and the second support. The structure is reasonably designed and makes full use of the space.

[0032] 5) In this invention, the two torsion springs are arranged in opposite directions, and limiting blocks are respectively set on the first support, the second support, the housing and the locking hook side to limit the end side of the torsion spring and provide an installation point on one side of the torsion spring, realizing the locking between the housing and the handle, and the locking between the housing and the locking hook, thus ensuring the self-locking function of the entire structure.

[0033] 6) The lock hook structure in this invention is reasonably designed. The lock hook has a first inclined surface on the side facing the latch. The lock hook has a groove that cooperates with the latch. Moreover, the connection between the first inclined surface and the groove is rounded. The first inclined surface can contact the latch, which is conducive to pushing the latch. Attached Figure Description

[0034] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0035] Figure 1 This is an exploded view of a self-locking handle structure for a cabinet according to one or more embodiments of the present invention.

[0036] Figure 2 This is a schematic diagram of a self-locking latch structure for a cabinet according to one or more embodiments of the present invention, in which the handle drives the locking hook to rotate and separate from the latch.

[0037] Figure 3 This is a schematic diagram of the handle and lock hook returning to their original positions after unlocking, according to one or more embodiments of the present invention, which is a self-locking handle structure for a cabinet.

[0038] Figure 4 This is a schematic diagram of a self-locking latch structure for a cabinet according to one or more embodiments of the present invention, in which the locking hook is attached to the latch.

[0039] Figure 5 This is a schematic diagram showing the contact between the first inclined surface of the latch and the lock hook during the locking process in a self-locking latch structure for a cabinet according to one or more embodiments of the present invention.

[0040] Figure 6 This is a schematic diagram of a first limit block set on the first support in a self-locking handle structure for a cabinet according to one or more embodiments of the present invention.

[0041] Figure 7 This is a schematic diagram of a second limiting block set in a self-locking latch structure for a cabinet according to one or more embodiments of the present invention.

[0042] Figure 8 This is a schematic diagram of a third limiting block provided on the second support in a self-locking handle structure for a cabinet according to one or more embodiments of the present invention.

[0043] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0044] Among them: 1. baffle, 2. latch, 3. lock hook, 4. housing, 5. pivot, 6. first elastic element, 7. second elastic element, 8. lever, 9. fixing block, 10. handle, 11. cabinet door;

[0045] 3-1. First inclined surface; 3-2. Recess; 3-3. Second limiting block;

[0046] 4-1. First support; 4-11. First limiting block; 4-2. Second support; 4-21. Third limiting block; 4-3. Protrusion;

[0047] 9-1. First gap; 8-1. Second gap. Detailed Implementation

[0048] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] As described in the background section, in the prior art, the lock hook is prone to insufficient rebound when the unlocking time is applied. In order to solve the above technical problem, the present invention proposes a self-locking handle structure for cabinets.

[0051] Example 1

[0052] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a self-locking handle structure for a cabinet includes a housing 4 connected to the cabinet door 11. At least one side of the housing 4 supports a pivot 5, one side of which extends beyond the housing 4. One side of the pivot 4 is a square shaft, and the other side is a round shaft. A fixing block 9 is provided inside the handle 10, and the fixing block 9 is fitted onto the round shaft. A lever 8 is fitted onto the square shaft, and the lever 8 is engaged with the fixing block 9. A locking hook 3 is provided at the square shaft of the pivot, and the locking hook 3 is located outside the lever 8. The locking hook has a recess to cooperate with a latch 2 fixed to the cabinet. A first elastic element 6 is provided between the locking hook 3 and the housing 4, and a second elastic element 7 is provided between the fixing block 8 and the housing.

[0053] In this embodiment, the housing 4 is trapezoidal in shape, with sloping sides on both sides. The top side of the housing 4 is rounded to the sides. The housing 4 has a protrusion 4-3. From one side of the housing 4 to the other side, the protrusion 4-3 includes a first sloping section, a horizontal section and a second sloping section. The handle is located on one side of the protrusion. The protrusion facilitates the installation of the handle 10 on one side of the protrusion 4-3. The shape of one side of the protrusion is consistent with the shape of the handle. The handle 10 is also trapezoidal in shape. Corresponding fixing blocks are fixed on both sides of the inner side of the handle. The handle 10 does not contact the housing 4, so that the handle has a set rotation angle. The maximum rotation angle of the handle is 30°-36°, specifically 35°.

[0054] It is easy to understand that the housing 4 is provided with multiple openings. Multiple openings are provided on the side of the housing protrusion away from the handle. Fasteners such as screws pass through the openings to connect the housing 4 to the cabinet door 11. The fasteners can be removed relative to the housing to maintain and adjust the disassembled self-locking handle structure. After installation, the housing can be installed on the cabinet door to realize its use. Of course, the self-locking handle structure can also be replaced.

[0055] Specifically, each side of the housing 4 is supported by a locking hook 3, and correspondingly, the cabinet is provided with two latches 2. The latches 2 are U-shaped latches, and the cross-section of each side of the latches 2 is circular. When the outer side of the locking hook contacts the upper side of the latch, the upper side of the latches 2 is set higher than the central axis of the rotating shaft.

[0056] In this embodiment, each side of the housing 4 is supported by a rotating shaft via a first support 4-1 and a second support 4-2. Each rotating shaft supports a locking hook 3. The distance between the two locking hooks is greater than the length of the housing. The first support 4-1 and the second support 4-2 are spaced apart. The first support is located at the end of the housing. One side of the rotating shaft extends beyond the first support. The toggle block 8 and the fixing block 9 are located between the first support and the second support. The center holes of the toggle block and the fixing block are square holes so that the toggle block and the fixing block are located at the square shaft. The connection between the square shaft and the round shaft is located between the first support 4-1 and the second support 4-2. A limiting end is provided at one end of the round shaft located at the second support to prevent the rotating shaft from coming off the first support and the second support.

[0057] In this embodiment, the first elastic element 6 is located between the first support 4-1 and the locking hook 3; the second elastic element 7 is located between the second support 4-2 and the lever block 8. The first and second supports can provide stable support for the rotating shaft. The arrangement of the first and second supports facilitates the arrangement of the first and second elastic elements.

[0058] Both the first elastic element 6 and the second elastic element 7 are torsion springs, specifically the first torsion spring and the second torsion spring;

[0059] It is easy to understand that the first torsion spring extends out on both sides, and the first support is provided with a first limiting block 4-11 on the side facing the first torsion spring to abut against one side of the first torsion spring. The first limiting block has a first oblique cross section. The locking hook 3 is provided with a second limiting block 3-3 on the side facing the first torsion spring to abut against the other side of the first torsion spring. The second limiting block has a second oblique cross section. In this way, the first torsion spring is always kept in a compressed state between the handle and the housing, so that the buckle is always kept in a spring-loaded and locked state under the action of the first torsion spring in its natural state.

[0060] Correspondingly, a third limiting block 4-21 is provided on the side of the second support 4-2 facing the second torsion spring to abut against one side of the second torsion spring. The third limiting block has a third oblique cross section. A fourth limiting block is provided on the inside of the handle to abut against the other side of the second torsion spring. The fourth limiting block has a fourth oblique cross section.

[0061] The first, second, third, and fourth inclined sections are all inclined relative to the central axis of the rotating shaft.

[0062] It should be explained that, considering that the fixing block 9 needs to drive the lever block 8 to rotate, a first notch 9-1 is provided on the upper side of the fixing block 9 near the locking hook 3, and a second notch 8-1 is provided on the lower side of the lever block 8. The fixing block 9 and the lever block 8 are engaged through the first notch 9-1 and the second notch 8-1; the first side of the first notch is in contact with the first side of the second notch, and the second side of the first notch is in contact with the second side of the second notch.

[0063] The first and second notches have the same width; both the first and second notches are arc-shaped and semi-circular, which can achieve effective engagement between the fixing block and the lever block.

[0064] Regarding the lock hook, a square hole is provided on one side of the lock hook 3, which is fitted onto the square shaft. The other side of the lock hook has a hook part that cooperates with the latch. The hook part has a recess that cooperates with the latch. A first inclined surface is provided on the side of the hook part facing the latch. The lock hook 3 is installed on the square shaft. In the unlocked state, the first inclined surface 3-1 can contact the outer circular surface on the upper side of the latch. At this time, the lock hook is in a horizontal state, and the length direction of the lock hook is perpendicular to the plane where the latch is located. At this time, the connection between the first inclined surface 3-1 and the recess 3-2 is rounded.

[0065] In some examples, the length of the locking hook 3 is greater than the thickness of the cabinet door 11 to ensure the engagement of the hook part with the latch.

[0066] In addition, a baffle 1 is provided on the outside of the locking hook 3 on the rotating shaft 5. The baffle 1 is a shaft retaining ring. The baffle is stuck in the groove of the rotating shaft. The baffle is located on the outside of the locking hook to fix the locking hook. The baffle can be removed by existing clips (disassembly tools similar to tweezers in the prior art).

[0067] The structure provided in this embodiment is simple in overall structure. The locking hook is installed at the square shaft of the rotating shaft. Rotating the handle housing drives the fixed block to rotate relative to the round shaft of the rotating shaft. After rotating at a set angle, the fixed block contacts the lever block. The lever block drives the rotating shaft and the locking hook to rotate together. The locking hook separates from the latch. Under external force, the locking hook can be hooked at the latch. Under the action of the first elastic element and the second elastic element, the locking hook is always engaged with the latch and maintains the locked state.

[0068] Example 2

[0069] This embodiment provides a working method for a self-locking handle structure for a cabinet as described in Embodiment 1, including the following:

[0070] Unlocking process: Relative to the cabinet door, turning the handle causes the lever to rotate, which in turn drives the pivot to rotate the lock hook. (See reference) Figure 2 As shown, the latch 3 separates from the bolt 2, at which point the cabinet door opens. After the cabinet door opens, refer to... Figure 3 As shown, the handle and the locking hook return to their original positions, and the locking hook returns to the state where its first inclined surface contacts the upper side of the latch. After the locking hook returns to its original position, the cabinet door opens relative to the cabinet body under the action of the gas spring, and the gas spring realizes the connection between the cabinet door and the cabinet body.

[0071] Locking process: With the cabinet door open, manually press the lower edge of the door. This forces the door to rotate downwards towards the cabinet body, overcoming the gas spring. When the door rotates until the outer side of the lock hook (the first inclined surface) contacts the upper side of the latch, continue applying force to the door. (Refer to...) Figure 5 As shown, at this time, the latch forces the hook to rotate in a direction away from the cabinet, that is, upward. When the hook rotates past the lowest point of the hook, under the action of the first and second elastic elements, the hook rotates towards the cabinet, and the hook hooks the latch. (Refer to...) Figure 4 As shown, the locking hook is tilted upward relative to the cabinet body to lock the cabinet door. When there is no manual operation, the handle and locking hook are always in the locked position under the action of the first and second elastic elements.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-locking handle structure for a cabinet, characterized in that, The device includes a housing connected to a cabinet door. At least one side of the housing supports a pivot. One side of the pivot extends beyond the housing. One side of the pivot is a square shaft, and the other side is a round shaft. A fixing block is provided inside the handle. The fixing block is fitted onto the round shaft. A lever is fitted onto the square shaft. The lever and the fixing block are engaged. A locking hook is provided at the square shaft of the pivot. The locking hook is located outside the lever. The locking hook has a recess to cooperate with a latch fixed to the cabinet body. A first elastic element is provided between the locking hook and the housing. The two sides of the first elastic element are limited by the locking hook and the housing, respectively. A second elastic element is provided between the fixing block and the housing. The two sides of the second elastic element are limited by the handle and the housing, respectively. This application specifically defines that the housing supports the rotating shaft by a first support and a second support arranged at intervals, and the toggle block and the fixing block are arranged between the first support and the second support, the first elastic element is located between the first support and the locking hook, and the second elastic element is located between the second support and the toggle block. The fixing block is provided with a first notch, and the shifting block is provided with a second notch. The fixing block and the shifting block are engaged through the first notch and the second notch. The first side of the first notch fits into the first side of the second notch, and the second side of the first notch fits into the second side of the second notch; The first elastic element is located between the first support and the locking hook; the second elastic element is located between the second support and the lever block; The first support is provided with a first limiting block on the side facing the first elastic member to abut against one side of the first elastic member, and the locking hook is provided with a second limiting block on the side facing the first elastic member to abut against the other side of the first elastic member; The second support is provided with a third limiting block on the side facing the second elastic member to abut against one side of the second elastic member, and the handle is provided with a fourth limiting block to abut against the other side of the second elastic member.

2. The self-locking handle structure for a cabinet according to claim 1, characterized in that, The widths of the first notch and the second notch are the same; Both the first and second gaps are arc-shaped gaps.

3. The self-locking handle structure for a cabinet according to claim 1, characterized in that, The housing supports the rotating shaft via a first support and a second support, with a distance between the first support and the second support. The lever and the fixing block are located between the first support and the second support. Both the first elastic element and the second elastic element are torsion springs.

4. The self-locking handle structure for a cabinet according to claim 1, characterized in that, The latch is a U-shaped latch; The cross-section of each side of the latch is circular.

5. A self-locking handle structure for a cabinet according to claim 1, characterized in that, The locking hook has a hook portion that engages with the locking bolt, the hook portion has a recess that engages with the locking bolt, and a first inclined surface is provided on the side of the hook portion facing the locking bolt, with a rounded transition at the connection between the first inclined surface and the recess. The length of the locking hook is greater than the thickness of the cabinet door.

6. The self-locking handle structure for a cabinet according to claim 1, characterized in that, The pivot is provided with a baffle plate on the outside of the locking hook, and the baffle plate is locked at the pivot.

7. The self-locking handle structure for a cabinet according to claim 1, characterized in that, The housing has a protrusion, and the handle is located on one side of the protrusion; The housing is provided with several openings, through which fasteners are passed to connect the housing to the cabinet door.

8. A method for operating a self-locking handle structure for a cabinet according to any one of claims 1-7, characterized in that, Includes the following: Unlocking process: Relative to the cabinet door, turn the handle. The handle drives the lever to rotate, which in turn drives the pivot to rotate the lock hook. The lock hook separates from the latch, and the cabinet door opens. Locking process: When the cabinet door is open, manually press the lower edge of the cabinet door, and the cabinet door will rotate towards the cabinet body. When the cabinet door rotates to the point where the outer side of the lock hook contacts the latch, continue to apply force to the cabinet door. At this time, the latch forces the lock hook to rotate away from the cabinet body. When the lock hook rotates past the lowest point of the hook, under the action of the first elastic element and the second elastic element, the lock hook rotates towards the cabinet body and hooks the latch, thus locking the cabinet door. When there is no manual operation, the handle and the lock hook will always be in the locked position under the action of the first elastic element and the second elastic element.

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