Lock catch device

Abstract

The utility model discloses a lock catch device which comprises a first buckle body and a second buckle body, the first buckle body is provided with a locking upper seat and a first magnetic part, keys are symmetrically arranged in the locking upper seat with respect to the central axis of the locking upper seat, at least part of the keys protrude out of the locking upper seat, a spring bolt is arranged below the keys, and the keys are connected with the spring bolt; the second buckle body comprises a locking lower seat and a second magnetic part matched with the first magnetic part in a magnetic attraction mode, the locking lower seat is provided with a limiting cavity for containing the locking upper seat and the spring bolt, the inner wall of the end, close to the first buckle body, of the locking lower seat is provided with a lower locking protrusion, and the spring bolt is provided with an upper locking protrusion matched with the lower locking protrusion; and the key can drive the spring bolt to elastically move towards the center of the locking upper seat. According to the lock catch device, locking can be conducted without magnetic attraction force, the height of the lock catch can be effectively reduced, the structure is more compact, and the risks of collision and accidental injury are not likely to happen.

Description

Technical Field

[0001] This utility model relates to the field of locking equipment technology, and in particular to locking devices. Background Technology

[0002] A locking device generally consists of three parts: a first latch body, a second latch body, and a button for unlocking or locking. To close the locking device in the closing direction, the first and second latch bodies can be placed on top of each other and connected in the closed position. To unlock the locking device, the first and second latch bodies can be released from each other.

[0003] In the prior art, such as the utility model patent with patent publication number CN218390030U, a magnetic buckle is disclosed, which includes a locking assembly, a buckle base assembly, and a button. The button is provided with a first hook, the locking assembly is provided with a first magnet, and the buckle base assembly is provided with a second magnet and a second hook. When the first magnet and the second magnet are attracted, the first hook and the second hook engage with each other, so that the locking assembly and the buckle base assembly engage with each other. The key point is that the button also includes a first pushing slope, and correspondingly, the buckle base assembly includes a second pushing slope. When the button is pressed and moves within the locking assembly, the first pushing slope and the second pushing slope abut against each other, causing the locking assembly and the buckle base assembly to separate, and finally the magnetic lock is opened. This necessitates the installation of a column structure (i.e., the second mounting base 25) extending a certain height along the fastening direction in order to install a second push-in ramp of a certain length on the column structure, thereby enabling the magnetic lock to separate and open properly. Obviously, this will increase the overall height or thickness of the magnetic fastener, occupying a large space and posing a risk of bumping or accidental injury.

[0004] Furthermore, during the interlocking process, the cooperation between the locking assembly and the buckle assembly largely depends on the magnetic control of the magnet. If the magnetic force is too strong, there is a risk of pinching a hand; if the magnetic force is too weak, it is not easy to lock. Therefore, there are problems such as inconvenience in use and short service life. Utility Model Content

[0005] This application provides a locking device that, on the one hand, breaks through the awkward situation that conventional locks require magnetic attraction to lock, thereby eliminating various problems faced by magnetic control in the prior art. On the other hand, it directly removes the second mounting base without affecting locking and unlocking, which can effectively reduce the height or thickness of the lock, making the structure more compact and less prone to the risk of bumps or accidental injury.

[0006] This application provides a locking device, including a first locking body and a second locking body. The first locking body is provided with a locking upper seat and a first magnetic element. The locking upper seat is symmetrically provided with a button about its central axis. The button at least partially protrudes from the locking upper seat. A locking tongue is provided below the button, and the button is connected to the locking tongue.

[0007] The second buckle body is provided with a lower locking seat and a second magnetic element that magnetically engages with the first magnetic element. The lower locking seat is provided with a limiting cavity that accommodates the upper locking seat and the latch. The lower locking seat has a lower locking protrusion on the inner wall of one end near the first buckle body. The latch has an upper locking protrusion that engages with the lower locking protrusion.

[0008] The button can cause the locking tongue to move elastically toward the center of the locking seat.

[0009] In one possible implementation, the first buckle body has a top cover plate on the side of the upper locking seat away from the second buckle body, and the first magnetic element is disposed on the inner side of the top cover plate; the second buckle body has a bottom cover plate on the side of the lower locking seat away from the first buckle body, and the second magnetic element is disposed on the inner side of the bottom cover plate.

[0010] In one possible implementation, the second magnetic element is located inside the bottom cover plate, or protrudes upward from the bottom cover plate, or protrudes downward from the bottom cover plate, wherein "upward" refers to the direction toward the first magnetic element.

[0011] In one possible implementation, the top cover plate has the same shape as the locking upper seat, and the bottom end of the top cover plate is provided with an upper connecting plate along the circumference. The upper connecting plate is detachably connected to the locking upper seat, and the upper connecting plate is provided with an upper limit channel that cooperates with the button.

[0012] In one possible implementation, the locking upper seat includes a seat body and a lower connecting plate connected to the outer periphery of the seat body. The lower connecting plate is detachably connected to the upper connecting plate. The seat body has a first baffle at the middle position of the two buttons. The buttons elastically abut against the first baffle through a first elastic member.

[0013] In one possible implementation, the inner ring of the lower connecting plate is arc-shaped, and the first elastic element is wavy, extending along the inner ring of the lower connecting plate.

[0014] In one possible implementation, the lower connecting plate is provided with a lower limiting channel that cooperates with the button. The lower limiting channel, together with the upper limiting channel, forms a moving channel for limiting the movement of the button. The inner ends of the two side walls of the lower limiting channel are symmetrically provided with button anti-disengagement blocks, and the button anti-disengagement blocks cooperate with the outer ends of the first elastic member.

[0015] In one possible implementation, a locking tongue limiting groove is provided in the middle of the seat body. The locking tongue limiting groove extends coaxially with the inner ring of the lower connecting plate. The first baffle extends vertically into the locking tongue limiting groove. The two locking tongues penetrate vertically through the groove wall of the locking tongue limiting groove and abut against the first baffle through the second elastic member.

[0016] In one possible implementation, the second elastic element is wavy and extends along the groove wall of the locking tongue limiting groove.

[0017] In one possible implementation, the button and the first elastic element corresponding to the button and the first baffle are an integral structure, and / or the latch and the second elastic element corresponding to the latch and the first baffle are an integral structure.

[0018] In one possible implementation, the groove wall of the latch limiting groove is provided with a latch limiting channel that cooperates with the latch, and the latch limiting channel is provided with symmetrical latch anti-disengagement blocks in the side wall, and the latch anti-disengagement blocks cooperate with the outer end of the second elastic member.

[0019] Beneficial effects: Compared with the prior art, the locking device provided in this application is in a locked state in its natural state based on the cooperation between the upper and lower locking protrusions. The locking stability is good, it is not easy to fail to lock, and it is safe to use. When the buttons are pressed on both sides, the buttons drive the bolt to move inward elastically, so that the upper locking protrusion disengages from the lower locking protrusion. Then, under the action of external force, the first and second latches can be separated to complete the unlocking action. Unlocking is convenient, it is not easy to pinch fingers, and it has a long service life. While not affecting the locking and unlocking actions, it also directly eliminates the columnar structure in conventional locks, which can effectively reduce the overall height or thickness of the lock, making the structure more compact, occupying less space, and less prone to bumping problems.

[0020] The combination of the first magnetic component and the second magnetic component can further enhance the connection strength between the first buckle and the second buckle in the locked state, resulting in better locking stability and safer use.

[0021] The moving channel ensures the stability of button movement and makes pressing the button convenient. The locking tongue limiting channel ensures the stability of locking tongue movement and enables precise unlocking.

[0022] Both the first and second elastic elements are corrugated and extend along the inner ring of the lower connecting plate and the groove wall of the locking tongue limiting groove, respectively. They extend and retract close to the side wall, saving space in the direction of button movement and making the structure of the locking device more compact. The first and second elastic elements have a large contact area with the side wall, resulting in a more uniform stress distribution. This side wall support method makes the elastic elements stronger in resisting lateral forces and more stable. At the same time, the corrugated shape can effectively absorb and disperse impact energy, providing better shock absorption. The structure is simple and easy to maintain.

[0023] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0024] Figure 1 A three-dimensional structural schematic diagram of the locking device of this application is shown.

[0025] Figure 2 An exploded structural diagram of the locking device of this application is shown.

[0026] Figure 3 A partial exploded structural diagram of the locking device of this application is shown.

[0027] Figure 4 A cross-sectional structural schematic diagram of the locking device of this application is shown.

[0028] In the diagram, 10-first buckle body, 101-upper limit channel, 102-lower limit channel, 103-lock tongue limiting groove, 104-lock tongue limiting channel, 11-locking upper seat, 111-seat body, 112-lower connecting plate, 12-top cover plate, 121-upper connecting plate, 13-first magnetic component, 14-first baffle, 15-button anti-disengagement block, 16-lock tongue anti-disengagement block, 20-second buckle body, 21-locking lower seat, 22-lower locking protrusion, 221-first inclined slope, 23-bottom cover plate, 24-second magnetic component, 201-limiting cavity, 30-button, 31-fixing component, 32-first elastic component, 40-lock tongue, 401-slot, 41-upper locking protrusion, 411-second inclined slope, 42-second elastic component. Detailed Implementation

[0029] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0030] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, the above terms should not be construed as limitations on this utility model.

[0031] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0032] refer to Figures 1 to 4 This application provides a locking device, including a first locking body 10 and a second locking body 20. The first locking body 10 is provided with a locking upper seat 11 and a first magnetic element 13. A button 30 is symmetrically arranged within the locking upper seat 11 about its central axis, and the button 30 at least partially protrudes from the locking upper seat 11 for easy pressing. A locking tongue 40 is provided below the button 30, and the button 30 is connected to the locking tongue 40. The second locking body 20 is provided with a locking lower seat 21 and a second magnetic element 24 that magnetically engages with the first magnetic element 13. The locking lower seat 21 is provided with a limiting cavity 201 that accommodates the locking upper seat 11 and the locking tongue 40, and a lower locking protrusion 22 is provided on the inner wall of the locking lower seat 21 near one end of the first locking body 10. Correspondingly, the locking tongue 40 is provided with an upper locking protrusion 41 that engages with the lower locking protrusion 22. The lower locking protrusion 22 is preferably a ring-shaped piece or a ring structure, distributed circumferentially at the top of the lower locking seat 21, which can fully ensure the locking relationship between the lower locking protrusion 22 and the upper locking protrusion 41, thereby ensuring the locking stability of the locking device. The button 30 can drive the bolt 40 to move elastically toward the center of the upper locking seat 11.

[0033] In one embodiment, the button 30 extends laterally vertically through the locking upper seat 11, and a fixing member 31 is vertically connected to the inner side of the locking upper seat 11. The locking tongue 40 is located below the button 30 and extends laterally vertically through the locking upper seat 11. A slot 401 that mates with the fixing member 31 is provided on the inner side of the locking upper seat 11. The opening of the slot 401 is located on the side away from the central axis. The fixing member 31 can be a fixing pin or a fixing block.

[0034] In its natural state, the first latch body 10 and the second latch body 20 are engaged through the cooperation of the upper locking protrusion 41 and the lower locking protrusion 22, that is, the latch device is in a locked state. When the buttons 30 are pressed on both sides, the buttons 30 push the latch tongue 40 towards the central axis through the fixing member 31 and the slot 401, so that the upper locking protrusion 41 disengages from the lower locking protrusion 22. At this time, the first latch body 10 and the second latch body 20 can be easily separated under the action of external force, and the unlocking action is completed. Compared to existing technologies, the locking device provided in this application departs from the conventional design of requiring a second mounting base to provide a second, longer, inclined surface during both locking and unlocking processes. This results in a smaller overall height or thickness, a smaller footprint, a more compact structure, and easier use. It also solves the problem of bumps and knocks caused by the excessive length of conventional column structures. Furthermore, small parts are locked internally, preventing scratches and mitigating the risk of children swallowing them. In addition, the locking and unlocking of this device does not rely entirely on the magnetic attraction of the magnetic components, thus avoiding various problems associated with conventional magnetic control, making it safer to use and extending its service life.

[0035] There can be only one locking tongue 40, as long as it can be driven by the button 30 (or driven by the cooperation between the slot 401 and the fixing member 31) and the upper locking protrusion 41 and the lower locking protrusion 22 to lock the latching device. It may just be that the locking effect is not very ideal. In the preferred embodiment, the button 30 and the locking tongue 40 are one-to-one, with two of each. The two buttons 30 are symmetrically distributed with respect to the central axis of the upper locking seat 11, and the two locking tongues 40 are also symmetrically distributed with respect to the central axis of the upper locking seat 11. During the locking process, the buttons 30 on both sides drive their corresponding locking tongues 40 to move inward, so that the two lower locking protrusions 41 can simultaneously disengage from the upper locking protrusion 22. Then, under the action of external force, the first latch body 10 and the second latch body 20 move in opposite directions to complete the unlocking. In this case, in the locked state, the locking tongues 40 on both sides can firmly lock the lower locking seat 21, resulting in better locking stability and safer use of the latching device. Similarly, those skilled in the art would readily conceive of locking by using three or four locking tongues 40 in conjunction with the locking lower seat 21, which is also within the scope of protection of this application.

[0036] The overall height of the locking device is 15.5mm-18.5mm, such as 17mm, and the horizontal dimensions are 55mm-60mm*48mm-52mm, preferably 58mm*50mm, which is more suitable for adults to grip and provides high comfort.

[0037] In addition, this locking device requires pressing the buttons on both sides in opposite directions simultaneously, which makes it less prone to accidental activation or unlocking due to pressure, compared to the conventional semi-enclosed structure of the second buckle.

[0038] In one embodiment, the first buckle 10 is provided with a top cover plate 12 on the side of the upper locking seat 11 away from the second buckle 20. The first magnetic element 13 is located inside the first magnetic element on the top cover plate 12, and is situated on the central axis of the upper locking seat 11. Correspondingly, the second buckle 20 includes a bottom cover plate 23 on the side of the lower locking seat 21 away from the first buckle 10, wherein the second magnetic element 24 is located inside the bottom cover plate 23. This allows the magnetic attraction between the first magnetic element 13 and the second magnetic element 24 to further enhance the connection strength between the first buckle 10 and the second buckle 20 in the locked state, making the locking device more stable and safer to use. The first magnetic element 13 can be a magnet or an iron block, and correspondingly, the second magnetic element 24 can be an iron block or a magnet. Furthermore, the design of the top cover plate 12 and the bottom cover plate 23 facilitates the installation, disassembly, and maintenance of the internal components.

[0039] More preferably, the second magnetic element 24 is located inside the bottom cover plate 23, or protrudes upward from the bottom cover plate 23 (e.g., Figure 4 (referring to the interior of the location), where upward refers to the direction closer to the first magnetic element 13. Both of these methods can make the overall structure of the locking device more compact and occupy less space. In addition, the second magnetic element 24 can also protrude downward from the bottom cover plate 23, which can reserve more usable space for the locking lower seat 21 to facilitate the reasonable arrangement of various internal components.

[0040] In one embodiment, the top cover plate 12 has the same shape as the locking upper seat 11. An upper connecting plate 121 is provided circumferentially at the bottom end of the top cover plate 12, and the upper connecting plate 121 is detachably connected to the locking upper seat 11 to facilitate the installation and maintenance of the various internal components of the locking device. The upper connecting plate 121 has an upper limit channel 101 that cooperates with the button 30, thereby providing guidance for the movement of the button 30, making pressing the button 30 more stable and convenient.

[0041] In one embodiment, the locking upper seat 11 includes a seat body 111 and a lower connecting plate 112 connected to the outer periphery of the seat body 111. The lower connecting plate 112 is detachably connected to the upper connecting plate 121. The seat body 111 has a first baffle 14 located between the two buttons 30, and the buttons 30 abut against the first baffle 14 via a first elastic element 32. This allows the two buttons 30 to elastically reset based on their respective first elastic elements 32, providing convenient control, stable performance, and a long service life. The buttons 30 and the first elastic elements 32 can be either separate or integrated. An integrated structure reduces the number of connection points between components, resulting in higher overall structural strength and rigidity, better stability, and more uniform load distribution. It also reduces the risk of excessive local stress. Furthermore, the structure is simpler, reducing maintenance requirements and assembly steps, thus improving installation efficiency. The integrated structure of the subsequent locking tongue 40 and the second elastic element 42 has the same effect.

[0042] In one embodiment, the inner ring of the lower connecting plate 112 is arc-shaped, and the first elastic element 32 is a corrugated strip shape, extending along the inner ring of the lower connecting plate 112. Compared to the conventional method of providing elastic return through a spring, this corrugated strip elastic element, due to its arc-shaped expansion and contraction, saves space compared to linear expansion and contraction. Furthermore, the contact area between the first elastic element 32 and the lower connecting plate 112 is larger, resulting in a more uniform stress distribution. This strengthens the lateral resistance of the first elastic element 32 and improves its elastic expansion and contraction stability. Additionally, this corrugated strip elastic element can effectively absorb and disperse impact energy, providing better shock absorption. It also features a simple structure and convenient maintenance.

[0043] In one embodiment, the lower connecting plate 112 is provided with a lower limiting channel 102 that cooperates with the button 30. The lower limiting channel 102, together with the upper limiting channel 101, forms a movement channel for limiting the movement of the button 30, ensuring the accuracy and stability of the button 30's movement direction. The inner ends of the two side walls of the lower limiting channel 102 are symmetrically provided with button anti-disengagement blocks 15. These blocks cooperate with the outer ends of the first elastic member 32, thereby allowing the button 30 to be limited at both ends of the first elastic member 32's extension and retraction direction by the button anti-disengagement blocks 15 in conjunction with the first baffle 14, preventing the button 30 from disengaging from the movement channel.

[0044] In one embodiment, a latch limiting groove 103 is provided in the middle of the seat 111. The latch limiting groove 103 extends coaxially with the inner ring of the lower connecting plate 112. Simultaneously, the first baffle 14 extends vertically into the latch limiting groove 103, and the latch 40 penetrates vertically through the groove wall of the latch limiting groove 103. It abuts against the first baffle 14 via a second elastic element 42, allowing the two latches 40 to elastically reset based on their respective second elastic elements 42. This provides convenient control, stable performance, and a long service life. The latch 40 and the second elastic element 42 can be either separate structures or an integrated structure.

[0045] More preferably, the second elastic element 42 is wavy in shape and extends along the groove wall of the latch limiting groove 103. The second elastic element 42 has a similar shape to the first elastic element 32, and its function is the same as that of the first elastic element 32, which will not be described again here. In addition, the bottoms of the first elastic element 32 and the second elastic element 42 can respectively abut against the top of the seat 111 and the bottom of the latch limiting groove 103. This not only limits the first elastic element 32 and the second elastic element 42 at the side walls, but also provides support for the bottoms of the first elastic element 32 and the second elastic element 42, resulting in better elastic expansion and contraction stability.

[0046] In one embodiment, the groove wall of the latch limiting groove 103 is provided with a latch limiting channel 104 that cooperates with the latch 40. At the same time, the latch limiting channel 104 is symmetrically provided with latch anti-disengagement blocks 16 in the side wall, and the latch anti-disengagement blocks 16 cooperate with the outer end of the second elastic member 42. Thus, the latch anti-disengagement blocks 16, together with the first baffle 14, form a limit at both ends of the second elastic member 42 in the extension and retraction direction, and can prevent the latch 40 from disengaging from the locking seat 11 in the unlocked state, making it more convenient to use.

[0047] In one embodiment, the inner end of the top of the lower locking protrusion 22 on the lower locking base 21 is provided with a first inclined slope 221, which is inclined from the outside to the inside and gradually away from the first buckle body 10. Correspondingly, the outer end of the upper locking protrusion 41 on the latch 40 is provided with a second inclined slope 411, which is inclined in the same direction as the first inclined slope 221. When the locking device is in the unlocked state, only external force is needed to drive the first buckle body 10 and the second buckle body 20 to approach each other. On the one hand, the first magnetic element 13 and the second magnetic element 24 generate a certain attraction force. On the other hand, the latch 40 can more easily pass over the lower locking protrusion 22 based on the cooperation of the second inclined slope 411 and the first inclined slope 221, and then move to the bottom of the lower locking protrusion 22 to complete the locking, making the operation more convenient.

[0048] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0049] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A locking device, characterized in that, It includes a first buckle body and a second buckle body. The first buckle body is provided with a locking upper seat and a first magnetic element. The locking upper seat is symmetrically provided with a button about its central axis. The button protrudes at least partially from the locking upper seat. A locking tongue is provided below the button. The button is connected to the locking tongue. The second buckle body is provided with a lower locking seat and a second magnetic element that magnetically engages with the first magnetic element. The lower locking seat is provided with a limiting cavity that accommodates the upper locking seat and the latch. The lower locking seat has a lower locking protrusion on the inner wall of one end near the first buckle body. The latch has an upper locking protrusion that engages with the lower locking protrusion. The button can cause the locking tongue to move elastically toward the center of the locking seat.

2. The locking device as described in claim 1, characterized in that, The first buckle body has a top cover plate on the side of the upper locking seat away from the second buckle body, and the first magnetic element is located inside the top cover plate. The second buckle body has a bottom cover plate on the side of the lower locking seat away from the first buckle body, and the second magnetic element is located inside the bottom cover plate.

3. The locking device as described in claim 2, characterized in that, The top cover plate has the same shape as the locking upper seat. The bottom end of the top cover plate is provided with an upper connecting plate along the circumference. The upper connecting plate is detachably connected to the locking upper seat. The upper connecting plate is provided with an upper limit channel that cooperates with the button.

4. The locking device as described in claim 3, characterized in that, The locking upper seat includes a seat body and a lower connecting plate connected to the outer periphery of the seat body. The lower connecting plate is detachably connected to the upper connecting plate. The seat body has a first baffle at the middle position of the two buttons. The buttons elastically abut against the first baffle through a first elastic element.

5. The locking device as described in claim 4, characterized in that, The inner ring of the lower connecting plate is arc-shaped, and the first elastic element is wavy in shape, extending along the inner ring of the lower connecting plate.

6. The locking device as described in claim 5, characterized in that, The lower connecting plate is provided with a lower limiting channel that cooperates with the button. The lower limiting channel and the upper limiting channel form a moving channel for limiting the movement of the button. The inner ends of the two side walls of the lower limiting channel are symmetrically provided with button anti-disengagement blocks, and the button anti-disengagement blocks cooperate with the outer ends of the first elastic element.

7. The locking device as described in claim 5 or 6, characterized in that, A locking tongue limiting groove is provided in the middle of the seat body. The locking tongue limiting groove extends coaxially with the inner ring of the lower connecting plate. The first baffle extends vertically into the locking tongue limiting groove. The two locking tongues penetrate vertically through the groove wall of the locking tongue limiting groove and abut against the first baffle through the second elastic member.

8. The locking device as described in claim 7, characterized in that, The second elastic element is wavy and extends along the groove wall of the locking tongue limiting groove.

9. The locking device as described in claim 8, characterized in that, The button and the first elastic element correspondingly connected to the button and the first baffle are integral structures, and / or the latch and the second elastic element correspondingly connected to the latch and the first baffle are integral structures.

10. The locking device as described in claim 8, characterized in that, The groove wall of the latch limiting groove is provided with a latch limiting channel that cooperates with the latch. The latch limiting channel is provided with symmetrical latch anti-disengagement blocks in the side wall. The latch anti-disengagement blocks cooperate with the outer end of the second elastic element.

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