A self-elastic lock body

Abstract

The present invention discloses a self-elastic lock body. During the door closing process, the scissor tongue and the detection tongue are pressed at the same time; when the scissor tongue enters the door frame and pops out, the self-locking trigger block moves upward under the action of the self-locking reset spring, driving the self-locking connecting rod to move together; when the self-locking connecting rod is separated from the limiting cooperation with the main lock tongue, the main lock tongue automatically extends under the action of the main lock tongue torsion spring to complete the door closing action. Its advantages are: 1) the main lock tongue automatically pops out after closing the door, which is simple and convenient; 2) the scissor tongue and the detection tongue pop out at the same time, the main lock tongue will not pop out, and there will be no false closing and mis-elasticity; 3) the pop-up is more effective, the product stability is improved, and the service life is longer. Furthermore, under the action of the restoring force of the connecting rod reset mechanism, the limiting structure at the end of the self-locking connecting rod can be kept in the groove of the main lock tongue to prevent the main lock tongue from extending, so as to lock the main lock tongue and improve stability.

Description

Technical Field

[0001] The invention relates to the technical field of lock bodies, and in particular to a self-elastic lock body. Background Art

[0002] As a smart home product, smart door locks have entered the fast lane of development. Their convenience, safety, and sense of technology have gradually been recognized and favored by consumers.

[0003] At present, the smart door locks on the market are basically double-fast lock bodies, and you need to lift the handle to lock the door after closing the door, which is a poor experience. People strongly demand a product that automatically locks after closing the door, which is simpler and more convenient to use.

[0004] The stability of the self-elastic lock body in the prior art needs to be improved:

[0005] 1) The probability of false locking is high, that is, the detection tongue and the scissor tongue are pressed at the same time and popped out at the same time, and the main lock tongue will be released;

[0006] 2) The stability is poor and the lock often fails;

[0007] 3) Difficult to assemble and poor stability;

[0008] 4) The main lock tongue has a weak ejection force and often fails to eject. Summary of the invention

[0009] In view of this, the present invention provides a self-pop-up lock body, and the main lock tongue automatically pops out after the door is closed, thereby preventing accidental pop-up due to half-closed doors, and increasing the effectiveness of the pop-up and the stability of the product.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A self-elastic lock body, comprising: a scissor tongue assembly, a self-locking assembly, a self-locking assembly reset mechanism, a main lock tongue and a main lock tongue reset mechanism;

[0012] The scissor tongue assembly can be slidably arranged in the lock shell of the lock body;

[0013] The self-locking assembly comprises: a self-locking connecting rod and a self-locking trigger block; the self-locking connecting rod and the main lock tongue have a matching limiting structure;

[0014] The self-locking assembly reset mechanism includes: a trigger block reset mechanism and a connecting rod reset mechanism; the self-locking connecting rod is connected to the self-locking trigger block through the connecting rod reset mechanism;

[0015] When the main lock tongue is retracted: the scissor tongue assembly that slides to the pressed state can make the self-locking trigger block in the limited position, and at this time, the self-locking connecting rod can cooperate with the main lock tongue in a limited position under the action of the restoring force provided by the connecting rod reset mechanism;

[0016] The scissors tongue assembly that slides to a fully popped-out state can allow the self-locking trigger block to move to an unlocked position under the restoring force of the trigger block reset mechanism, and drive the self-locking connecting rod to disengage from the limiting cooperation with the main lock tongue. At this time, the main lock tongue can pop out under the restoring force of the main lock tongue reset mechanism.

[0017] Preferably, the trigger block reset mechanism is a self-locking reset spring.

[0018] Preferably, the limiting structure includes:

[0019] A main lock tongue groove formed in the main lock tongue;

[0020] A shaft sleeve is arranged on the end rotating shaft of the self-locking connecting rod and is used for limiting cooperation with the groove of the main locking tongue.

[0021] Preferably, the scissors tongue assembly includes a scissors tongue support frame, and the scissors tongue support frame sliding to a pressed state can place the self-locking trigger block in a limited position, and the scissors tongue support frame sliding to a fully popped-up state can allow the self-locking trigger block to move under the restoring force of the trigger block reset mechanism.

[0022] Preferably, the scissors tongue support frame has a first surface, and the self-locking trigger block has a second surface for contacting and limiting cooperation with the first surface.

[0023] Preferably, the movement direction of the scissors tongue support frame is perpendicular to the movement direction of the self-locking trigger block.

[0024] Preferably, the self-locking trigger block in the unlocking position can limit the retraction of the scissors tongue assembly, and the main lock tongue can only cooperate with the self-locking connecting rod in a fully retracted state;

[0025] The self-elastic lock body further comprises: an unlocking block, which can switch the self-locking trigger block from an unlocking position to a limiting position.

[0026] Preferably, the limiting structure includes:

[0027] A main lock tongue limiting portion provided on the main lock tongue;

[0028] A connecting rod limiting portion provided on the self-locking connecting rod and used for limiting cooperation with the limiting portion of the main locking tongue;

[0029] When the main lock tongue is fully retracted, the main lock tongue limiting portion is located within the motion trajectory of the connecting rod limiting portion; when the main lock tongue is not fully retracted, the motion trajectories of the main lock tongue limiting portion and the connecting rod limiting portion are staggered.

[0030] Preferably, the unlocking block is provided with an operating hole, and the self-locking trigger block is provided with an operating column cooperating with the operating hole, and the unlocking block can cooperate with the operating column through the operating hole to move the self-locking trigger block from the second position to the first position;

[0031] The unlocking block is rotatably mounted on the housing of the lock body via a rotating shaft.

[0032] Preferably, the movement direction of the self-locking connecting rod is perpendicular to the movement direction of the main locking tongue.

[0033] Preferably, the connecting rod resetting mechanism is a self-locking spring.

[0034] Preferably, the self-locking spring is compression-connected between the trigger bone position of the self-locking trigger block and the connecting rod bone position of the self-locking connecting rod.

[0035] It can be seen from the above technical solution that the self-elastic lock body provided by the present invention has the following beneficial effects:

[0036] 1) The main lock tongue pops out automatically after the door is closed, which is simple and convenient;

[0037] 2) The scissor tongue and the detection tongue will pop out after being pressed at the same time, and the main lock tongue will not pop out, and there will be no false locking and false ejection;

[0038] 3) The main lock tongue groove design prevents the lock tongue from popping out;

[0039] 4) Locking and ejection are more effective, product stability is improved, and the use time is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic structural diagram of a self-elastic lock body in an unlocked state provided by an embodiment of the present invention;

[0042] Figure 2 A structural schematic diagram of a main lock tongue in a locked state provided by an embodiment of the present invention;

[0043] Figure 3 A structural schematic diagram of a self-elastic lock body in a locked state provided by an embodiment of the present invention;

[0044] Figure 4 A schematic structural diagram of a scissors tongue locking mechanism provided in an embodiment of the present invention.

[0045] Among them, 1 is the lower cover plate; 2 is the compression spring support frame; 3 is the lock tongue compression spring; 4 is the scissors tongue support frame, 4-1 is the first surface; 5 is the scissors tongue; 6 is the self-locking trigger block, 6-1 is the second surface, 6-2 is the trigger bone position, and 6-3 is the convex bulge; 7 is the detection tongue support frame; 8 is the detection tongue; 9 is the self-locking connecting rod, 9-1 is the shaft sleeve, 9-2 is the rotating shaft, and 9-3 is the connecting rod bone position; 10 is the unlocking block; 11 is the main lock tongue block; 12 is the main lock tongue, and 12-1 is the main lock tongue groove; 13 is the side strip; 14 is the main lock tongue torsion spring; 15 is the main lock tongue block torsion spring; 16 is the self-locking reset spring; 17 is the self-locking spring. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The self-elastic lock body, scissor tongue assembly, self-locking assembly, self-locking assembly reset mechanism, main lock tongue and main lock tongue reset mechanism provided by the embodiment of the present invention can refer to Figure 1 As shown, each component is arranged in the housing of the lock body such as the cover plate 1 below;

[0048] The scissor tongue assembly is slidably arranged in the lock shell of the lock body, and includes a scissor tongue 5;

[0049] The self-locking assembly includes: a self-locking connecting rod 9 and a self-locking trigger block 6; the self-locking connecting rod 9 and the main locking tongue 12 have a matching limiting structure;

[0050] The self-locking assembly reset mechanism includes: a trigger block reset mechanism and a connecting rod reset mechanism; the self-locking connecting rod 9 is connected to the self-locking trigger block 6 through the connecting rod reset mechanism;

[0051] When the main lock tongue is retracted: the scissor tongue assembly that slides to the pressed state (including the fully pressed state and the partially pressed state, i.e. the half-closed state) can make the self-locking trigger block 6 be in the limited position, at which time the self-locking connecting rod 9 can cooperate with the main lock tongue 12 in a limited position under the action of the restoring force provided by the connecting rod reset mechanism;

[0052] The scissors tongue assembly that slides to a fully popped-out state (i.e., a non-half-closed state) can allow the self-locking trigger block 6 to move to an unlocked position under the restoring force of the trigger block reset mechanism, and drive the self-locking connecting rod 9 to disengage from the limiting cooperation with the main lock tongue 12. At this time, the main lock tongue can pop out under the restoring force of the main lock tongue reset mechanism.

[0053] Figure 3is a schematic diagram of the locked state. During the door closing process, the scissor tongue 5 and the detection tongue 8 are pressed at the same time. When the scissor tongue 5 enters the door frame and pops out, Figure 1 The self-locking trigger block 6 in the door moves upward under the action of the trigger block reset mechanism, driving the self-locking connecting rod 9 to move together. When the self-locking connecting rod 9 is out of the limit fit with the main lock tongue 12, the main lock tongue 12 automatically extends under the action of the main lock tongue reset mechanism (such as the main lock tongue torsion spring 14), completing the door closing action.

[0054] It can be seen from the above technical solution that the self-popup lock body provided by the embodiment of the present invention can automatically pop out the main lock tongue 12 after the door is closed, which is simple and convenient; and when the scissor tongue 5 is pressed and popped out but not fully in place, the main lock tongue 12 will not pop out, and there will be no false closing and accidental popping; the assembly is simple and the stability is good.

[0055] Furthermore, the self-elastic lock body provided in the embodiment of the present invention further includes: a main lock tongue resetting mechanism, which is arranged in the housing of the lock body (such as the lower cover plate 1);

[0056] The limiting structure includes: a main lock tongue groove 12-1 opened on the main lock tongue 12, and a connecting rod limiting portion arranged at the end of the self-locking connecting rod 9 for cooperating with the main lock tongue groove 12-1; the main lock tongue reset mechanism can provide an outward restoring force for the main lock tongue 12.

[0057] Its structure can refer to Figure 1 and Figure 2 As shown, the main lock tongue 12 moves left and right along the slot of the lower cover plate 1, and the main lock tongue reset mechanism gives a long-term thrust to the main lock tongue 12 to extend outward; under the action of the restoring force of the connecting rod reset mechanism, the limiting portion at the end of the self-locking connecting rod 9 can be kept in the main lock tongue groove 12-1, preventing the main lock tongue 12 from extending out, thereby locking the main lock tongue 12; only when the self-locking connecting rod 9 is driven to make its limiting structure disengage from the main lock tongue groove 12-1, the main lock tongue 12 will extend outward under the action of the main lock tongue reset mechanism.

[0058] It can be seen from the above technical solution that the self-elastic lock body provided by the embodiment of the present invention can keep the limiting portion at the end of the self-locking connecting rod 9 in the main lock tongue groove 12-1 under the action of the restoring force of the connecting rod reset mechanism, thereby preventing the main lock tongue 12 from extending, thereby locking the main lock tongue 12 and improving stability.

[0059] As a preferred embodiment, the limiting part is a sleeve 9-1 rotatably mounted on the end shaft 9-2 of the self-locking connecting rod 9, and its structure can be referred to Figure 2As shown. During the locking process, the self-locking connecting rod 9 slides into the main lock tongue groove 12-1 under the action of the connecting rod reset mechanism (specifically the restoring force of the self-locking spring 17 in this case), forming a limiting effect. The sleeve 9-1 and the main lock tongue groove 12-1 are rolled and frictionally matched, which has a self-lubricating effect and can effectively avoid being unable to slide in and lock or detach and pop out due to jamming, making locking and popping more effective, improving product stability, and using it for a longer time. Of course, the limiting structure can also be in the form of a hook, etc., which will not be repeated here.

[0060] Specifically, the trigger block reset mechanism is a self-locking reset spring 16, and its structure can refer to Figure 1 As shown, the direction is set along the movement direction of the self-locking trigger block 6 between the limit position and the unlocking position. Specifically, when the self-locking trigger block 6 is in the limit position, the self-locking reset spring 16 is in a compressed state; when the self-locking trigger block 6 is in the unlocking position, the self-locking reset spring 16 is in an extended state. Figure 2 As shown, the self-locking trigger block 6 is provided with a convex bump 6-3 for assembling with the self-locking reset spring 16. Furthermore, the self-elastic lock body also includes a compression spring support frame 2 for mounting the detection tongue support frame 7, the scissor tongue support frame 4 and its lock tongue compression spring 3, and the trigger block reset mechanism (here, the self-locking reset spring 16) is installed on the compression spring support frame 2. That is, the installation structure of the self-locking reset spring 16 is not set separately, but integrated into the existing installation structure of the scissor tongue 5 and the detection tongue 8, thereby simplifying the structure and facilitating assembly and maintenance.

[0061] In this embodiment, the movement direction of the self-locking connecting rod 9 is perpendicular to the movement direction of the main locking tongue 12, so as to improve the effectiveness of the limit cooperation and release between the two, thereby improving the locking and ejection effect and enhancing the product stability. In this embodiment, the connecting rod reset mechanism is a self-locking spring 17, and its structure can refer to Figure 1 and Figure 2 As shown. The first end of the self-locking spring 17 is connected to the self-locking trigger block 6, and the other end is connected to the self-locking connecting rod 9. Preferably, the setting direction of the self-locking spring 17 is perpendicular to the movement direction of the main lock tongue 12, so that the movement direction of the self-locking connecting rod 9 is perpendicular to the movement direction of the main lock tongue 12. Further, the movement direction of the self-locking trigger block 6 is the same as the movement direction of the self-locking connecting rod 9, that is, the self-locking reset spring 16 is parallel to the self-locking spring 17, so as to improve the effectiveness of the matching and release of the limit between the two.

[0062] Specifically, the scissor tongue assembly includes a scissor tongue support frame 4. The scissor tongue support frame 4 that slides to a pressed state can place the self-locking trigger block 6 in a limited position. The scissor tongue support frame 4 that slides to a fully popped-out state can allow the self-locking trigger block 6 to move under the action of the restoring force of the trigger block reset mechanism. The support frame is used to achieve full contact and cooperation with the self-locking trigger block 6. The structure can be referred to Figure 1 and Figure 3 shown.

[0063] Preferably, the scissor tongue support frame 4 has a first surface 4-1, and the self-locking trigger block 6 has a second surface 6-1 for contacting and limiting with the first surface 4-1. The surface contact between the scissor tongue support frame 4 and the self-locking trigger block 6 can expand the matching area, improve the effectiveness of the ejection, and increase the stability of the product. Furthermore, the first surface 4-1 is an inclined surface that forms an acute angle with the movement direction of the scissor tongue support frame 4, and the second surface 6-1 is an inclined surface that cooperates with the first surface 4-1 and forms an acute angle with the movement direction of the self-locking trigger block 6.

[0064] Specifically, the movement direction of the scissors tongue support frame 4 is perpendicular to the movement direction of the self-locking trigger block 6 to improve the effectiveness of the matching and release of the limit between the two. In this embodiment, the movement directions of the scissors tongue support frame 4 and the self-locking trigger block 6 are both straight lines.

[0065] In order to further optimize the above technical solution, the self-locking trigger block 6 in the unlocking position can limit the retraction of the scissor tongue assembly (such as the aforementioned scissor tongue support frame 4) to form a scissor tongue locking mechanism; the main lock tongue 12 can only cooperate with the self-locking connecting rod 9 in a fully retracted state;

[0066] The self-retracting lock body also includes: an unlocking block 10, which can switch the self-locking trigger block 6 from the unlocking position to the limiting position. Figure 4 As shown, the self-locking trigger block 6 contacts the scissor tongue support frame 4 (specifically, through the second surface 6-1 and the first surface 4-1), blocking the retraction of the scissor tongue 5. Through such a configuration, during the unlocking process, after the main lock tongue 12 is fully retracted, the self-locking trigger block 6 can be cut from the unlocking position to the limiting position, and the retraction of the scissor tongue support frame 4 is no longer restricted, so that the scissor tongue 5 is released to ensure residential safety.

[0067] In this embodiment, the unlocking block 10 is provided with an operating hole, and the self-locking trigger block 6 is provided with an operating column that cooperates with the operating hole. The unlocking block 10 cooperates with the operating column through its operating hole to move the self-locking trigger block 6 from the unlocking position to the limiting position. The structure is simple and the cooperation is reliable. Specifically, the unlocking block 10 is rotatably installed in the housing of the lock body (such as the lower cover 1) through a rotating shaft, so that the same square shaft end and the key end cooperate to perform the unlocking action. Its structure can be referred to Figure 1 shown.

[0068] Preferably, the limiting structure includes:

[0069] A main lock tongue limiting portion provided on the main lock tongue 12;

[0070] A connecting rod limiting portion provided on the self-locking connecting rod 9, used for limiting the cooperation with the limiting portion of the main locking tongue;

[0071] And when the main lock tongue 12 is fully retracted, the main lock tongue limiting part is located within the movement trajectory of the connecting rod limiting part. At this time, during the locking process, the self-locking connecting rod 9 moves under the action of the connecting rod resetting mechanism so that its connecting rod limiting part and the main lock tongue limiting part form a limiting fit; when the main lock tongue 12 is not fully retracted, the movement trajectories of the main lock tongue limiting part and the connecting rod limiting part are staggered. At this time, other parts of the matching surfaces of the main lock tongue 12 and the self-locking connecting rod 9, except the main lock tongue limiting part, cannot form a limiting fit with the connecting rod limiting part, so that the self-locking trigger block 6 maintains the unlocked position to restrict the retraction of the scissors tongue support frame 4.

[0072] Specifically, the main lock tongue limiting part is the main lock tongue groove 12-1, and the connecting rod limiting part is the shaft sleeve 9-1. The structure can refer to the previous description. Accordingly, when the main lock tongue 12 is fully retracted, the main lock tongue groove 12-1 is located within the movement track of the shaft sleeve 9-1. At this time, during the locking process, the self-locking connecting rod 9 slides into the main lock tongue groove 12-1 under the action of the connecting rod reset mechanism, forming a limiting effect.

[0073] When the main lock tongue 12 is not fully retracted, the movement trajectory of the main lock tongue groove 12-1 and the sleeve 9-1 are staggered. At this time, except for the main lock tongue groove 12-1, other parts (specifically a plane) of the mating surface between the main lock tongue 12 and the self-locking connecting rod 9 cannot form a limiting fit with the sleeve 9-1, so that the self-locking trigger block 6 remains in the unlocked position to limit the retraction of the scissors tongue support frame 4.

[0074] Specifically, the main lock tongue reset mechanism is a main lock tongue torsion spring 14, and its structure can refer to Figure 1 As shown, it is arranged on the inner side of the main lock tongue 12 (relative to the outer side thereof extending outward). The torsion spring structure can provide a strong restoring force for the main lock tongue 12, and the ejection is more effective.

[0075] Specifically, the self-locking spring 17 is compressed and connected between the trigger bone position 6-2 of the self-locking trigger block 6 and the connecting rod bone position 9-3 of the self-locking connecting rod 9, and reliable assembly can be achieved through the bone position. Further, the movement direction of the self-locking trigger block 6 is the same as the movement direction of the self-locking connecting rod 9, that is, the self-locking reset spring 16 is parallel to the self-locking spring 17, so as to improve the effectiveness of the cooperation and release of the limit between the two.

[0076] The present invention is further described below in conjunction with specific embodiments:

[0077] Figure 1It is a structural diagram of the self-elastic lock body. Among them, 1 is the lower cover plate, 2 is the compression spring support frame, 3 is the lock tongue compression spring, 4 is the scissor tongue support frame, 5 is the scissor tongue, 6 is the self-locking trigger block, 7 is the detection tongue support frame, 8 is the detection tongue, 9 is the self-locking connecting rod, 10 is the unlocking block, 11 is the main lock tongue block, 12 is the main lock tongue, 13 is the side strip, 14 is the main lock tongue torsion spring, 15 is the main lock tongue block torsion spring, and 16 is the self-locking reset spring. The main lock tongue 12 moves left and right along the slot of the lower cover plate 1, and the torsion spring gives the main lock tongue 12 a long-term thrust to extend outward. Only when the self-locking connecting rod 9 slides into the groove of the main lock tongue 12, will it hinder the lock tongue from extending outward and lock the main lock tongue.

[0078] Figure 2 The main lock tongue is locked. 17 is the self-locking spring, 9-1 is the shaft sleeve, and 12-1 is the main lock tongue groove. During the locking process, the self-locking connecting rod 9 slides into the main lock tongue groove 12-1 under the restoring force of the self-locking spring 17, forming a limiting effect. The shaft sleeve 9-1 and the main lock tongue groove 12-1 are rolling friction, which has a self-lubricating effect.

[0079] The self-locking spring is installed between the trigger bone position 6-2 of the self-locking trigger block and the connecting rod bone position 9-3 of the self-locking connecting rod. The self-locking spring is a compression spring. When there is no obstacle on the right side, it will push the self-locking connecting rod to the right, so that the shaft sleeve 9-1 of the self-locking connecting rod slides into the main lock tongue groove 12-1, preventing the main lock tongue from extending. Only when the self-locking reset spring drives the self-locking trigger block to move upward, driving the self-locking spring and the self-locking connecting rod to move together, so that the shaft sleeve of the self-locking connecting rod is separated from the main lock tongue groove, the main lock tongue will extend to the left under the action of the torsion spring. Figure 3 .

[0080] Figure 3 Schematic diagram of the locked state. During the door closing process, the scissor tongue 5 and the detection tongue 8 are pressed at the same time. When the scissor tongue 5 enters the door frame and pops out, Figure 1 The self-locking trigger block 6 in the door moves upward under the action of the self-locking reset spring 16, driving the self-locking connecting rod 9 to move together. After the self-locking connecting rod 9 is separated from the main lock tongue groove 12-1, the main lock tongue 12 automatically extends under the action of the spring to complete the door closing action.

[0081] Figure 4 Schematic diagram of the scissor tongue locking mechanism. The second surface 6-1 contacts the first surface 4-1 to block the retraction of the scissor tongue 5. During the unlocking process, the scissor tongue is released only after the main lock tongue is fully retracted, ensuring residential safety.

[0082] In summary, the embodiment of the present invention provides a self-elastic lock body, which has the following advantages:

[0083] 1) The main lock tongue pops out automatically after the door is closed, which is simple and convenient;

[0084] 2) The scissor tongue and the detection tongue will pop out after being pressed at the same time, and the main lock tongue will not pop out, and there will be no false locking and false ejection;

[0085] 3) The main lock tongue groove design prevents the lock tongue from popping out;

[0086] 4) Locking and ejection are more effective, product stability is improved, and the use time is longer.

[0087] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0088] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-elastic lock body, characterized in that: include: A scissors tongue assembly, a self-locking assembly, a self-locking assembly reset mechanism, a detection tongue (8), a main lock tongue and a main lock tongue reset mechanism; The scissor tongue assembly is slidably arranged in a lock shell of the lock body, and comprises a scissor tongue (5); the scissor tongue assembly comprises a scissor tongue support frame (4); when the scissor tongue support frame (4) is slid to a pressed state, the self-locking trigger block (6) is in a limited position; when the scissor tongue support frame (4) is slid to a fully popped-out state, the self-locking trigger block (6) is allowed to move under the action of the restoring force of the trigger block reset mechanism; The self-locking assembly comprises: a self-locking connecting rod (9) and a self-locking trigger block (6); the self-locking connecting rod (9) and the main locking tongue (12) have a matching limiting structure; The self-locking assembly reset mechanism comprises: a trigger block reset mechanism and a connecting rod reset mechanism; the self-locking connecting rod (9) is connected to the self-locking trigger block (6) via the connecting rod reset mechanism; The trigger block reset mechanism is a self-locking reset spring (16), and the self-locking trigger block (6) is provided with a convex bump (6-3) for assembling with the self-locking reset spring (16); the self-elastic lock body also includes a compression spring support frame (2) for mounting a detection tongue support frame (7), a scissor tongue support frame (4) and a lock tongue compression spring (3), and the self-locking reset spring (16) is mounted on the compression spring support frame (2); When the main lock tongue is retracted: the scissor tongue assembly that slides to a pressed state can place the self-locking trigger block (6) in a limited position, and at this time the self-locking connecting rod (9) can cooperate with the main lock tongue (12) in a limited position under the action of the restoring force provided by the connecting rod reset mechanism; The scissor tongue (5) and the detection tongue (8) are pressed simultaneously and then popped out. The scissor tongue assembly that slides to a fully popped-out state can allow the self-locking trigger block (6) to move to an unlocked position under the action of the restoring force of the trigger block reset mechanism, and drive the self-locking connecting rod (9) to disengage from the limiting fit with the main lock tongue (12). At this time, the main lock tongue can pop out under the action of the restoring force of the main lock tongue reset mechanism. The self-locking trigger block (6) in the unlocked position can limit the retraction of the scissors tongue assembly, and the main locking tongue (12) can only cooperate with the self-locking connecting rod (9) in a fully retracted state; The self-elastic lock body further comprises: an unlocking block (10), wherein the unlocking block (10) is capable of switching the self-locking trigger block (6) from an unlocking position to a limiting position; The limiting structure comprises: A main lock tongue limiting portion provided on the main lock tongue (12); A connecting rod limiting portion provided on the self-locking connecting rod (9) and used for limiting cooperation with the main locking tongue limiting portion; When the main lock tongue (12) is in a fully retracted state, the main lock tongue limiting portion is located within the motion trajectory of the connecting rod limiting portion; when the main lock tongue (12) is in a partially retracted state, the motion trajectories of the main lock tongue limiting portion and the connecting rod limiting portion are staggered; The unlocking block (10) is provided with an operating hole, and the self-locking trigger block (6) is provided with an operating column that cooperates with the operating hole. The unlocking block (10) can cooperate with the operating column through the operating hole to move the self-locking trigger block (6) from the unlocking position to the limiting position; The unlocking block (10) is rotatably mounted on the housing of the lock body via a rotating shaft; The connecting rod reset mechanism is a self-locking spring (17); The self-locking spring (17) is compressed and connected between the trigger bone position (6-2) of the self-locking trigger block (6) and the connecting rod bone position (9-3) of the self-locking connecting rod (9).

2. The self-elastic lock body according to claim 1, characterized in that: The limiting structure comprises: A main lock tongue groove (12-1) formed on the main lock tongue (12); A shaft sleeve (9-1) disposed on the end rotating shaft (9-2) of the self-locking connecting rod (9) and used for limited engagement with the main locking tongue groove (12-1).

3. The self-elastic lock body according to claim 1, characterized in that: The scissors tongue support frame (4) has a first surface (4-1), and the self-locking trigger block (6) has a second surface (6-1) for contacting and limiting cooperation with the first surface (4-1).

4. The self-elastic lock body according to claim 1, characterized in that: The movement direction of the scissors tongue support frame (4) is perpendicular to the movement direction of the self-locking trigger block (6).

5. The self-elastic lock body according to claim 1, characterized in that: The movement direction of the self-locking connecting rod (9) is perpendicular to the movement direction of the main locking tongue (12).

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