Four-stage automatic lock

Abstract

The utility model provides a four-stage automatic lock which comprises a main lock body, and linkage connecting pieces are installed on the two sides of the main lock body in the first direction respectively. The auxiliary lock body is in butt joint with the connecting piece and comprises a telescopic spring bolt and a locking mechanism used for limiting stretching and retracting of the spring bolt. A limiting mechanism is arranged on the spring bolt, so that the spring bolt can stretch out and draw back in two sections in the second direction; the locking mechanism is linked with the spring bolt and has two states; the auxiliary lock body and the main lock body are connected through the connecting piece, so that the auxiliary lock body can be driven in a linkage mode through the main lock body; meanwhile, a limiting mechanism is further arranged on the spring bolt of the auxiliary lock body, so that when the door body is in an open state, the spring bolt can only stretch out partially and can stretch out and draw back freely; and when the door body is in a closed state, the limiting mechanism is limited by the buckling box, so that the spring bolt can completely extend out, and at the moment, the locking mechanism loses the limitation of the spring bolt, so that the spring bolt is triggered and limited to retract, and an automatic locking function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical locks, in particular to a four-level automatic lock. Background Art

[0002] In many residential buildings, when choosing an entrance door, most people want an entrance door that is more convenient and safer to open and close. An important factor in the convenience of opening and closing the entrance door is the mechanical lock.

[0003] However, the current mechanical locks cannot meet the automatic locking function and can only be locked by pressing the handle or by electronic drive, which cannot meet the needs of safe and convenient use. Therefore, we designed a four-level automatic lock to solve the above problems. Utility Model Content

[0004] The utility model provides a four-level automatic lock, which connects the auxiliary lock body and the main lock body through a connecting piece, so that the auxiliary lock body can be driven in conjunction with the main lock body; at the same time, a limiting mechanism is also provided on the lock tongue of the auxiliary lock body, so that the lock tongue can only be partially extended when the door body is in an open state, and can be freely retracted; when the door body is in a closed state, the limiting mechanism will be restricted by the buckle box, so that the lock tongue can be fully extended, and at this time the locking mechanism will also lose the restriction of the lock tongue, thereby triggering the restriction of the lock tongue to retract, realizing the automatic locking function, and solving the technical problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides a four-stage automatic lock, including

[0006] A main lock body, wherein two sides of the main lock body along a first direction are respectively provided with linked connecting pieces, a lock hole is provided on the main lock body, a first latch and a second latch are slidably provided in the main lock body, a linkage cavity is provided in the main lock body, a connecting rod is movably provided in the linkage cavity, a limit block is rotatably provided on one side of the connecting rod, a linkage piece is rotatably provided on one side of the limit block, the first latch and the second latch are respectively provided on the linkage piece and the connecting rod, the linkage piece is rotatably connected in the linkage cavity, a supporting groove is provided in the main lock body, a first supporting spring is provided in the supporting groove, the other end of the first supporting spring is fixedly connected to the limit block, and a pull tab is connected in the main lock body;

[0007] A secondary lock body, the secondary lock body is connected to the connecting piece, and includes a retractable lock tongue and a locking mechanism for limiting the retraction of the lock tongue. A driving member is provided on one side of the main lock body, and the driving member is transmission-connected with the connecting piece. A transmission cavity is provided in the secondary lock body, and two latches are symmetrically slidably inserted in the transmission cavity. A linkage piece is rotationally connected in the transmission cavity, and a rotating piece is rotationally provided on one side of the linkage piece. The rotating piece is rotationally connected in the transmission cavity, and a second supporting spring is provided in the transmission cavity, and the other end of the second supporting spring is fixedly connected to the rotating piece.

[0008] The locking tongue is provided with a limiting mechanism, so that the locking tongue can be extended and retracted in two stages along the second direction;

[0009] The locking mechanism is linked with the deadbolt and includes two states;

[0010] When the locking tongue is in the first extension section, the locking mechanism is in the first state, and the locking tongue can be relatively retracted;

[0011] When the locking tongue is in the second extension section, the locking mechanism is in the second state, and the locking tongue is relatively fixed.

[0012] Furthermore,

[0013] The secondary lock body also includes a housing;

[0014] A slider is provided in the housing corresponding to the lock tongue;

[0015] The locking tongue is detachably connected to the sliding block via a bolt, and is used to switch the direction of the locking tongue slope;

[0016] The slider is slidably installed in the housing, and a sliding direction is parallel to the second direction.

[0017] Furthermore,

[0018] A relatively rotatable paddle is also installed in the housing via a hinge shaft;

[0019] The paddle is L-shaped, one end of which is connected to the slider and the other end is linked to the connecting piece;

[0020] The hinge shaft is also sleeved with a first torsion spring for driving the paddle to automatically reset.

[0021] Furthermore,

[0022] The locking mechanism includes a limit plate and a docking block;

[0023] The limit plate is slidably mounted on the slider, the sliding direction of which is parallel to the first direction, and a bending portion is provided on one side corresponding to the docking block;

[0024] The docking block is fixedly installed in the housing, located at a side of the sliding block away from the locking tongue, and has an L-shaped end for clamping with the bent portion.

[0025] Furthermore,

[0026] The sliding block is provided with a matching sliding groove corresponding to the limiting plate;

[0027] The slide groove extends along the first direction, and a second torsion spring connected to the limit plate is provided at the bottom for driving the limit plate to automatically reset;

[0028] One end of the limiting plate along the first direction is also butted against the paddle.

[0029] Furthermore,

[0030] The housing is also provided with a sunken groove on a side away from the slider;

[0031] The groove extends along the first direction and is provided with a matching sliding sheet inside;

[0032] The sliding plate can be slidably installed in the groove, the paddle is linked with the sliding plate, and the sliding plate is linked with the connecting plate.

[0033] Furthermore,

[0034] The two ends of the sliding piece along the first direction are respectively provided with clamping heads for docking with the connecting piece;

[0035] The shell is provided with through openings at both ends along the first direction for the connecting piece to pass through.

[0036] Furthermore,

[0037] The limiting mechanism comprises a latching tongue hingedly mounted on the locking tongue;

[0038] The lock tongue is provided with a mounting groove corresponding to the latch tongue;

[0039] The mounting groove extends along the second direction, and a hinge shaft for mounting the latch tongue is provided at one end close to the slider;

[0040] The axis direction of the hinge shaft is parallel to the first direction.

[0041] Furthermore,

[0042] A slot is provided on one side of the latch tongue away from the lock tongue, for locking and limiting the position with the panel strip;

[0043] A panel strip is fixedly mounted on the secondary lock body, and a matching opening is provided corresponding to the lock tongue, for allowing the latch tongue to pass through and engage with the latch slot;

[0044] The locking slot is located in the middle of the locking tongue, the side away from the sliding block is an inclined surface, and the side close to the sliding block is a vertical surface.

[0045] Furthermore,

[0046] A spring is also provided between the latch tongue and the mounting slot for driving the latch tongue to automatically reset;

[0047] A matching mounting hole is provided in the middle of the bottom of the mounting groove corresponding to the spring;

[0048] The latch tongue is provided with a matching docking post corresponding to the spring, and is used for being sleeve-connected with the spring.

[0049] Furthermore, the first plate body and the second plate body are respectively installed at both ends of the panel strip, and the first plate body and the second plate body are respectively provided with a first cavity and a second cavity, and the second special-shaped gear and the first special-shaped gear are respectively rotatably arranged in the first cavity and the second cavity, and a transmission gear is also rotatably arranged in the second cavity, and the third rack and the first rack are respectively slidably arranged in the first cavity and the second cavity, and the first mounting member and the second mounting member are respectively provided at one end of the first rack and the third rack, and the first connecting member and the second connecting member are respectively slidably inserted in the first mounting member and the second mounting member, and the first connecting member and the second connecting member are respectively connected to the first rack and the third rack, and the sky lock member and the ground lock member are respectively slidably inserted on the opposite sides of the first mounting member and the second mounting member, and the first mounting member and the second mounting member are respectively connected. A first spring and a second spring are respectively provided inside the first plate body and the second plate body, and a second rack is jointly inserted into the first plate body, and two ends of the second rack are respectively meshed with the second special-shaped gear and the transmission gear, and the first rack and the third rack are respectively meshed with the first special-shaped gear and the second special-shaped gear, and the first special-shaped gear is meshed with the transmission gear, and a limiting member is provided on the opposite sides of the first mounting member and the second mounting member, and a locking groove is provided in the first mounting member and the second mounting member, and a locking key is slidably provided in the first mounting member and the second mounting member, and the two locking keys are respectively matched with the sky lock member and the ground lock member to resist, and the locking key cooperates with the locking groove to be slidably inserted in the locking groove, and a third spring is provided in the first mounting member and the second mounting member, and the other end of the third spring is fixedly connected with the locking key.

[0050] Compared with the related art, the four-stage automatic lock provided by the utility model has the following beneficial effects:

[0051] In the utility model, the auxiliary lock body and the main lock body are connected by a connecting piece, so that the auxiliary lock body can be driven in linkage with the main lock body; at the same time, a limiting mechanism is also provided on the lock tongue of the auxiliary lock body, so that the lock tongue can only be partially extended when the door body is in an open state, and can be freely retracted; when the door body is in a closed state, the limiting mechanism will be restricted by the buckle box, so that the lock tongue can be fully extended, and at this time the locking mechanism will also lose the restriction of the lock tongue, thereby triggering the restriction of the lock tongue to retract, and realizing the automatic locking function. In addition, in the process of automatic locking, the sky lock component and the ground lock component will also automatically lock. Inserted into the door frame, when the lock needs to be unlocked, the second rack will be pulled and moved. At this time, the second rack drives the second special-shaped gear to rotate, so that the second special-shaped gear drives the third rack and the second connecting piece to move in the opposite direction, so that the ground lock can slide out of the door frame. In addition, during the movement of the second rack, the second rack will also drive the rotation, so that the transmission gear drives the first special-shaped gear to rotate, and then the first special-shaped gear drives the first rack and the first connecting piece to drive the sky lock to slide out of the door frame, which can play the role of a sky and earth lock. In summary, the mechanical lock can achieve the effect of a four-level lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 A schematic diagram of the structure of a combined lock provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of the structure of the secondary lock body of the multi-lock provided in an embodiment of the present application;

[0054] Figure 3 A schematic structural diagram of an exploded view of a secondary lock body of a multi-lock provided in an embodiment of the present application;

[0055] Figure 4 A schematic diagram of the structure of the buckle box of the combined lock provided in an embodiment of the present application;

[0056] Figure 5 A schematic diagram of the structure of the second plate of the multi-body lock provided in an embodiment of the present application;

[0057] Figure 6 A schematic structural diagram of a first plate body of a multi-body lock provided in an embodiment of the present application;

[0058] Figure 7 A schematic diagram of the structure inside the locking groove of the combined lock provided in an embodiment of the present application;

[0059] Figure 8 A schematic diagram of the three-dimensional structure of the exterior of the main lock body provided in an embodiment of the present application;

[0060] Fig. 9 A schematic diagram of the three-dimensional structure of a half-section view of the interior of a main lock body provided in an embodiment of the present application.

[0061] Numbers in the figure: 100, main lock body; 110, connecting piece; 200, auxiliary lock body; 210, lock tongue; 220, housing; 230, slider; 240, paddle; 241, first torsion spring; 250, limit plate; 251, docking block; 260, slide; 270, latch tongue; 271, slot; 300, panel strip; 400, buckle box; 410, docking panel; 420, eccentric nail; 500, first plate body; 510, second plate body; 520, first cavity; 530, second cavity; 540, first special-shaped gear; 550, transmission gear; 560, first rack; 570, first mounting member; 580, first connecting member; 590 , first spring; 600, sky lock; 610, second rack; 620, second special-shaped gear; 630, third rack; 640, second mounting member; 650, second connecting member; 660, second spring; 670, ground lock; 680, limit member; 690, locking groove; 700, locking key; 710, third spring; 720, lock hole; 730, first latch; 740, second latch; 750, driving member; 760, connecting rod; 770, limit block; 780, supporting groove; 790, first supporting spring; 800, linkage member; 810, lock; 820, second supporting spring; 830, linkage sheet; 840, rotating sheet. DETAILED DESCRIPTION

[0062] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0063] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0064] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] Please refer to Figure 1-9 The present embodiment provides a combined lock, including a main lock body 100, wherein two sides of the main lock body 100 along a first direction are respectively provided with linked connecting pieces 110, a lock hole 720 is provided on the main lock body 100, a first latch 730 and a second latch 740 are slidably provided in the main lock body 100, a linkage cavity is provided in the main lock body 100, a connecting rod 760 is movably provided in the linkage cavity, a limiting block 770 is rotatably provided on one side of the connecting rod 760, and a limiting block 770 is rotatably provided on one side of the limiting block 770 The linkage member 800, the first latch 730 and the second latch 740 are respectively arranged on the linkage member 800 and the connecting rod 760, the linkage member 800 is rotatably connected in the linkage cavity, a support groove 780 is provided in the main lock body 100, a first support spring 790 is arranged in the support groove 780, the other end of the first support spring 790 is fixedly connected to the limit block 770, and a pull tab is connected in the main lock body 100; the auxiliary lock body 200, the auxiliary lock body 200 is connected to the connecting piece 110, and includes an extendable The invention relates to a locking mechanism for limiting the extension and retraction of the lock tongue 210, a driving member 750 is arranged on one side of the main lock body 100, and the driving member 750 is transmission-connected with the connecting piece 110, a transmission cavity is provided in the auxiliary lock body 200, and two latches 810 are symmetrically slidably inserted in the transmission cavity, a linkage piece 830 is rotationally connected in the transmission cavity, a rotating piece 840 is rotationally arranged on one side of the linkage piece 830, and the rotating piece 840 is rotationally connected in the transmission cavity, and a second supporting spring 820 is arranged in the transmission cavity, and the other end of the second supporting spring 820 is fixedly connected with the rotating piece 840; a limiting mechanism is arranged on the lock tongue 210, so that the lock tongue 210 can be extended and retracted in two sections along the second direction; the locking mechanism is linked with the lock tongue 210, including two states; when the lock tongue 210 is in the first section extension, the locking mechanism is in the first state, and the lock tongue 210 can be relatively extended; when the lock tongue 210 is in the second section extension, the locking mechanism is in the second state, and the lock tongue 210 is relatively fixed.

[0066] In this embodiment, the main lock body 100 is located in the middle, and the auxiliary lock bodies 200 are respectively installed on both sides along the first direction; the auxiliary lock body 200 is connected to the main lock body 100 through a connecting piece 110, and the auxiliary lock body 200 can be synchronously controlled to perform corresponding actions through the key and handle on the main lock body 100. The specific operation is: a person inserts the key into the lock hole 720, and as the key is twisted, the linkage member 800 can move in the linkage cavity, and then the linkage member 800 releases the limit of the limit block 770, so that The first support spring 790 pushes the limit block 770 and the connecting rod 760 apart due to its own elastic force, so that the second latch 740 and the first latch 730 can slide out of the main lock body 100. At the same time, the pull piece will transmit the release of the limit of the linkage piece 830 in the transmission cavity. At this time, the second support spring 820 pushes the rotating piece 840 and the linkage piece 830 apart due to its own elastic force, so that the two locks 810 slide out of the transmission cavity, and the lock 810, the first latch 730 and the second latch 740 can be transmitted and retracted.

[0067] In this embodiment, a lock tongue 210 is retractably mounted on the secondary lock body 200; at the same time, a limiting mechanism is also provided on the lock tongue 210, so that the lock tongue 210 can be retracted in two stages; when the door body is in an open state, the lock tongue 210 can only be partially extended, and only after the door body is closed and the lock tongue 210 enters the buckle box 400, can the lock tongue 210 be fully extended.

[0068] In this embodiment, a locking mechanism is further provided in the secondary lock body 200 corresponding to the lock tongue 210. The locking mechanism is linked with the lock tongue 210. When the lock tongue 210 is in the first extension state, the locking mechanism is restricted and will not affect the extension and retraction of the lock tongue 210. When the lock tongue 210 is fully extended, the locking mechanism will be triggered, thereby restricting the lock tongue 210 from retracting.

[0069] It should be noted that the driving member 750 will push the connecting piece 110 to achieve automatic unlocking. In addition, for the auxiliary lock body 200, the two auxiliary lock bodies 200 have the same working principle when opening the door, except that the auxiliary lock body 200 located at the upper end is unlocked by pushing the mechanism through the connecting piece 110, and the other auxiliary lock body 200 located at the lower end is unlocked by pulling the auxiliary lock mechanism through the connecting piece 110.

[0070] In a preferred embodiment, the secondary lock body 200 also includes a shell 220; a slider 230 is provided in the shell 220 corresponding to the lock tongue 210; the lock tongue 210 is detachably connected to the slider 230 by a bolt, which is used to switch the direction of the slope of the lock tongue 210; the slider 230 can be slidably installed in the shell 220, and the sliding direction is parallel to the second direction.

[0071] In this embodiment, the lock tongue 210 is slidably installed with the housing 220 through the slider 230; wherein the slider 230 and the housing 220 are slidably connected; and the lock tongue 210 is fixedly installed on the slider 230 by bolts; since the lock tongue 210 and the slider 230 are connected by bolts, the direction of the slope of the lock tongue 210 can be changed at will to meet different usage requirements, which is more practical.

[0072] In a preferred embodiment, a relatively rotatable paddle 240 is installed in the shell 220 through a hinge shaft; the paddle 240 is L-shaped, the paddle 240 is linked with the slide 260, and the slide 260 is linked with the connecting piece 110, which is used to drive the slider 230 to slide relatively in the second direction; a first torsion spring 241 is also sleeved on the hinge shaft to drive the paddle 240 to automatically reset.

[0073] In this embodiment, the paddle 240 is L-shaped, connected to the shell 220 at the corner through a hinge shaft, one end is connected to the connecting piece 110, and the other end is connected to the slider 230; when the main lock body 100 is unlocked, the connecting piece 110 will drive the paddle 240 to rotate relative to each other, thereby driving the slider 230 to slide relative to each other, causing the lock tongue 210 to retract into the shell 220.

[0074] In this embodiment, a first torsion spring 241 is further sleeved on the hinge shaft. When the paddle 240 is not driven by external force, the first torsion spring 241 will continue to apply thrust to the slider 230, thereby preventing the lock tongue 210 from retracting without external force.

[0075] In a preferred embodiment, the locking mechanism includes a limit plate 250 and a docking block 251; the limit plate 250 can be slidably installed on the slider 230, the sliding direction is parallel to the first direction, and a bending portion is provided on one side corresponding to the docking block 251; the docking block 251 is fixedly installed in the shell 220, located on the side of the slider 230 away from the lock tongue 210, and the end is L-shaped for clamping with the bending portion.

[0076] In this embodiment, the locking mechanism includes two parts: a limit plate 250 and a docking block 251; the limit plate 250 can be slidably installed on the slider 230, and a bending portion is provided on the side away from the lock tongue 210; the docking block 251 is fixedly installed on the shell 220, and an L-shaped card interface is provided at the end corresponding to the bending portion; when the bending portion is inserted into the card interface, it will effectively limit the sliding of the slider 230 relative to the shell 220.

[0077] In a preferred embodiment, a matching slide groove is provided on the slider 230 corresponding to the limit plate 250; the slide groove extends along the first direction, and a second torsion spring connected to the limit plate 250 is also provided at the bottom for driving the limit plate 250 to automatically reset; one end of the limit plate 250 along the first direction is also docked with the paddle 240.

[0078] In this embodiment, a sliding groove is set on the slider 230 to limit the limit plate 250 to slide only in the first direction and cannot move in the second direction; at the same time, the bottom of the sliding groove is also connected to the limit plate 250 through a second torsion spring, so that the limit plate 250 can be automatically reset.

[0079] In a preferred embodiment, the shell 220 is further provided with a sunken groove on the side away from the slider 230; the groove extends along the first direction, and a matching slide 260 is provided inside; the slide 260 can be slidably installed in the groove, and the sliding direction is parallel to the first direction, and is used to connect the paddle 240 and the connecting piece 110.

[0080] In this embodiment, the paddle 240 is connected to the connecting piece 110 via a sliding piece 260 ; a sunken groove is provided on the housing 220 corresponding to the sliding piece 260 ; the groove is located on the side of the slider 230 away from the limiting plate 250 .

[0081] In a preferred embodiment, the sliding piece 260 is provided with clamps at both ends along the first direction for docking with the connecting piece 110 ; the housing 220 is provided with through openings at both ends along the first direction for the connecting piece 110 to pass through.

[0082] In a preferred embodiment, the limiting mechanism includes a latch tongue 270 hingedly mounted on the locking tongue 210; a mounting groove is provided on the locking tongue 210 corresponding to the latch tongue 270; the mounting groove extends along the second direction, and a hinge shaft for mounting the latch tongue 270 is provided at one end close to the slider 230; the axial direction of the hinge shaft is parallel to the first direction.

[0083] In this embodiment, the locking tongue 210 is provided with a mounting groove extending along the second direction, so as to be used for installing the latch tongue 270; one end of the latch tongue 270 is hingedly installed in the mounting groove, and the other end can be raised and lowered relative to the mounting groove, so that it can be completely sunk into the mounting groove and can also be raised to engage with the outside.

[0084] In a preferred embodiment, a slot 271 is provided on the side of the latch 270 away from the lock tongue 210, which is used to engage with the panel strip 300 for limiting position; the panel strip 300 is fixedly mounted on the secondary lock body 200, and a matching opening is provided corresponding to the lock tongue 210, for the latch 270 to pass through and engage with the slot 271; the slot 271 is located in the middle of the lock tongue 210, the side away from the slider 230 is an inclined surface, and the side close to the slider 230 is a vertical surface.

[0085] In this embodiment, a slot 271 is provided on the latch tongue 270 so as to engage with the panel strip 300 on the side of the door body, thereby limiting the lock tongue 210 from fully extending; the side of the slot 271 away from the slider 230 is an inclined surface, so that the panel strip 300 can not only be inserted into the slot 271, but also slide out of the slot 271 normally; and the side of the slot 271 close to the slider 230 is a vertical surface, which is used to limit the panel strip 300 from sliding out of the slot 271 in this direction.

[0086] In a preferred embodiment, a spring is provided between the latch tongue 270 and the mounting slot for driving the latch tongue 270 to automatically reset; a matching mounting hole is provided in the middle of the bottom of the mounting slot corresponding to the spring; a matching docking column is provided on the latch tongue 270 corresponding to the spring for connecting with the spring sleeve.

[0087] In this embodiment, a spring is further provided between the latch tongue 270 and the latch slot 271 so that the latch tongue 270 is always in a pop-up state when no external force is applied.

[0088] In a preferred embodiment, both ends of the buckle box 400 along the vertical direction are respectively connected to the docking panel 410 , so that the buckle box 400 and the docking panel 410 are relatively fixed.

[0089] In this embodiment, the docking panel 410 and the buckle box 400 are connected by an eccentric nail 420, and a connecting hole is provided corresponding to the eccentric nail 420; the connecting hole is a stepped hole, which can effectively limit the displacement of the eccentric nail 420 along the axial direction.

[0090] In this embodiment, the eccentric nail 420 includes a conical portion located in the connecting hole and a lever portion eccentrically installed on the conical portion; at the same time, a strip hole with a matching width is provided on the buckle box 400 corresponding to the lever portion, and the strip hole extends in the vertical direction. By rotating the eccentric nail 420, the buckle box 400 can be effectively driven to translate left and right, thereby ensuring docking with the lock tongue 210.

[0091] In this embodiment, an end of the lever portion away from the truncated cone portion is provided with an external thread, and a matching nut is installed with the thread after passing through the bar-shaped hole, thereby restricting the buckle box 400 from detaching.

[0092] In a preferred embodiment, the first plate body 500 and the second plate body 510 are respectively installed at both ends of the panel strip 300, and the first plate body 500 and the second plate body 510 are respectively provided with a first cavity 520 and a second cavity 530, and the second cavity 520 and the second cavity 530 are respectively provided with a second special-shaped gear 620 and a first special-shaped gear 540 for rotation, and the second cavity 530 is also provided with a transmission gear 550 for rotation, and the third rack 630 and the first rack 560 are respectively slidably provided in the first cavity 520 and the second cavity 530, and one end of the first rack 560 and the third rack 630 is respectively provided with a first mounting member 570 and a second mounting member 640, and the first mounting member 570 and the second mounting member 640 are respectively slidably inserted with a first connecting member 580 and a second connecting member 650, and the first connecting member 580 The second connecting member 650 is connected to the first rack 560 and the third rack 630 respectively, and the sky lock member 600 and the ground lock member 670 are slidably inserted on the opposite sides of the first mounting member 570 and the second mounting member 640 respectively. The first spring 590 and the second spring 660 are respectively arranged in the first mounting member 570 and the second mounting member 640, and the second rack 610 is commonly inserted in the first plate body 500 and the second plate body 510. The two ends of the second rack 610 are respectively meshed and connected with the second special-shaped gear 620 and the transmission gear 550, the first rack 560 and the third rack 630 are respectively meshed and connected with the first special-shaped gear 540 and the second special-shaped gear 620, the first special-shaped gear 540 is meshed and connected with the transmission gear 550, and a limiting member 680 is provided on the opposite side of the first mounting member 570 and the second mounting member 640.

[0093] In this embodiment, during the automatic locking process, the sky lock component 600 and the ground lock component 670 will also automatically lock and insert into the door frame. When the lock needs to be unlocked, the second rack 610 will be pulled and moved. At this time, the second rack 610 drives the second special-shaped gear 620 to rotate, so that the second special-shaped gear 620 drives the third rack 630 and the second connecting member 650 to move in the opposite direction, so that the ground lock component 670 can slide out of the door frame. In addition, during the movement of the second rack 610, the second rack 610 will also drive 55 to rotate, so that the transmission gear 550 drives the first special-shaped gear 540 to rotate, and then the first special-shaped gear 540 drives the first rack 560 and the first connecting member 580 to drive the sky lock component 600 to slide out of the door frame. It should be noted that the principles of the ground lock component 670 and the sky lock component 600 are the same as the above-mentioned lock tongue 210 and the latch tongue 270. In summary, the mechanical lock can achieve the effect of a four-level lock.

[0094] In a preferred embodiment, locking grooves 690 are provided in the first mounting member 570 and the second mounting member 640, and locking keys 700 are slidably provided in the first mounting member 570 and the second mounting member 640. The two locking keys 700 respectively cooperate with the sky lock member 600 and the ground lock member 670 to resist each other, and the locking key 700 cooperates with the locking grooves 690 to be slidably inserted in the locking grooves 690. A third spring 710 is provided in the first mounting member 570 and the second mounting member 640, and the other end of the third spring 710 is fixedly connected to the locking key 700.

[0095] In this embodiment, when the sky lock 600 and the ground lock 670 are retracted, the two locking keys 700 move to the right at the same time to release the locking function. When the second stage is triggered in place, under the action of the third spring 710, the locking key 700 is automatically inserted into the locking groove 690 to achieve the automatic locking function.

[0096] Working process:

[0097] In the initial state, the latch 270 is engaged with the panel strip 300, thereby limiting the lock tongue 210 in a semi-extended state. At this time, the limit plate 250 is against the side of the docking block 251, which will not affect the extension and retraction of the lock tongue 210; when the lock tongue 210 slides into the buckle box 400, the latch 270 will also be pressed into the installation groove. Since the panel strip 300 and the buckle box 400 are in a docking state at this time, the slot 271 cannot be engaged with the panel strip 300, so that the lock tongue 210 can be fully extended; at the same time, the limit plate 250 will also be snapped into the end of the docking block 251, thereby limiting the retraction of the lock tongue 210, thereby realizing automatic locking. In addition, it should be noted that when locking When the locking cam 730 is unlocked, the locking cam 730 is unlocked and the locking cam 730 is unlocked.

[0098] When unlocking, the connecting piece 110 is driven to extend and retract through the main lock body 100, thereby driving the paddle 240 to rotate relatively. During the rotation, not only the lock tongue 210 is driven to move backward, but also the limit plate 250 is driven to move backward through the inclined surface at the end, thereby disengaging from the card connection with the docking block 251, and finally achieving effective unlocking.

[0099] During the automatic locking process, the sky lock 600 and the ground lock 670 will also automatically lock and insert into the door frame. When unlocking is required, the second rack 610 will be pulled and moved. At this time, the second rack 610 drives the second special-shaped gear 620 to rotate, so that the second special-shaped gear 620 drives the third rack 630 and the second connecting member 650 to move in the opposite direction, so that the ground lock 670 can slide out of the door frame. In addition, during the movement of the second rack 610, the second rack 610 will also drive 55 to rotate, so that the transmission gear 550 drives the first special-shaped gear 540 to rotate, thereby causing the first special-shaped gear 540 to rotate. The gear 540 drives the first rack 560 and the first connecting member 580 to drive the sky lock member 600 to slide out of the door frame. It should be noted that the principles of the ground lock member 670 and the sky lock member 600 are the same as the above-mentioned lock tongue 210 and the latch tongue 270. In summary, the mechanical lock can achieve the effect of a four-level lock. In addition, when the sky lock member 600 and the ground lock member 670 are retracted, the two locking keys 700 move to the right at the same time to release the locking function. When the second level is triggered in place, under the action of the third spring 710, the locking key 700 is automatically inserted into the locking groove 690 to achieve the function of automatic locking.

[0100] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0101] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Four-level automatic lock, characterized by: include A main lock body (100), wherein the main lock body (100) is respectively provided with linked connecting pieces (110) on both sides along a first direction, a lock hole (720) is provided on the main lock body (100), a first latch (730) and a second latch (740) are slidably provided in the main lock body, a linkage cavity is provided in the main lock body (100), a connecting rod (760) is movably provided in the linkage cavity, a limit block (770) is rotatably provided on one side of the connecting rod (760), and a limit block (770) is rotatably provided on one side of the limit block (770) A linkage member (800) is provided in the main lock body (100), the first latch (730) and the second latch (740) are respectively provided on the linkage member (800) and the connecting rod (760), the linkage member (800) is rotatably connected in the linkage cavity, a support groove (780) is provided in the main lock body (100), a first support spring (790) is provided in the support groove (780), the other end of the first support spring (790) is fixedly connected to the limit block (770), and a pull tab is connected in the main lock body (100); A secondary lock body (200), the secondary lock body (200) is docked with the connecting piece (110), and comprises a retractable lock tongue (210) and a locking mechanism for limiting the retraction of the lock tongue (210); a driving member (750) is arranged on one side of the main lock body (100), and the driving member (750) is connected to the connecting piece (110) in a transmission manner; a transmission cavity is provided in the secondary lock body (200), and two latches (810) are symmetrically slidably inserted in the transmission cavity; a linkage piece (830) is rotatably connected in the transmission cavity; a rotating piece (840) is rotatably arranged on one side of the linkage piece (830), and the rotating piece (840) is rotatably connected in the transmission cavity; a second supporting spring (820) is arranged in the transmission cavity, and the other end of the second supporting spring (820) is fixedly connected to the rotating piece (840); The locking tongue (210) is provided with a limiting mechanism, so that the locking tongue (210) can be extended and retracted in two stages along the second direction; The locking mechanism is linked with the lock tongue (210) and includes two states; When the locking tongue (210) is in the first extension section, the locking mechanism is in the first state, and the locking tongue (210) can be relatively retracted; When the locking tongue (210) is in the second extension section, the locking mechanism is in the second state, and the locking tongue (210) is relatively fixed.

2. The four-stage automatic lock according to claim 1, characterized in that: The secondary lock body (200) further comprises a housing (220); A sliding block (230) is provided in the housing (220) corresponding to the locking tongue (210); The locking tongue (210) is detachably connected to the sliding block (230) via a bolt, and is used to switch the direction of the slope of the locking tongue (210); The slider (230) is slidably mounted in the housing (220), and the sliding direction is parallel to the second direction.

3. The four-stage automatic lock according to claim 2, characterized in that: A relatively rotatable paddle (240) is also installed in the housing (220) via a hinge shaft; The paddle (240) is L-shaped, and one end thereof is butted against the slider (230); The hinge shaft is also sleeved with a first torsion spring (241) for driving the paddle (240) to automatically reset.

4. The four-stage automatic lock according to claim 3, characterized in that: The locking mechanism comprises a limiting plate (250) and a docking block (251); The limiting plate (250) is slidably mounted on the sliding block (230), the sliding direction is parallel to the first direction, and a bending portion is provided on one side corresponding to the docking block (251); The docking block (251) is fixedly installed in the housing (220) and is located on a side of the slider (230) away from the locking tongue (210), and has an L-shaped end for clamping with the bent portion.

5. The four-stage automatic lock according to claim 4, characterized in that: The sliding block (230) is provided with a matching sliding groove corresponding to the limiting plate (250); The slide groove extends along the first direction, and a second torsion spring connected to the limit plate (250) is provided at the bottom for driving the limit plate (250) to automatically reset; One end of the limiting plate (250) along the first direction is also butted against the paddle (240).

6. The four-stage automatic lock according to claim 4, characterized in that: The housing (220) is also provided with a sunken groove on a side away from the slider (230); The groove extends along the first direction and has a matching sliding sheet (260) disposed therein; The sliding plate (260) can be slidably installed in the groove, and the sliding direction is parallel to the first direction. The paddle (240) is linked with the sliding plate (260), and the sliding plate (260) is linked with the connecting plate (110).

7. The four-stage automatic lock according to claim 6, characterized in that: The sliding piece (260) is provided with clamping heads at both ends along the first direction, respectively, for docking with the connecting piece (110); The shell (220) is provided with through openings at both ends along the first direction, respectively, for allowing the connecting piece (110) to pass through.

8. The four-stage automatic lock according to claim 2, characterized in that: The limiting mechanism comprises a latch tongue (270) hingedly mounted on the locking tongue (210); The locking tongue (210) is provided with a mounting groove corresponding to the latching tongue (270); The mounting groove extends along the second direction, and a hinge shaft for mounting the latch tongue (270) is provided at one end close to the slider (230); The axis direction of the hinge shaft is parallel to the first direction.

9. The four-stage automatic lock according to claim 8, characterized in that: A slot (271) is provided on one side of the latch tongue (270) away from the lock tongue (210) for locking and limiting the position with the panel strip (300); A panel strip (300) is fixedly mounted on the secondary lock body (200), and a matching opening is provided corresponding to the lock tongue (210) for allowing the latch tongue (270) to pass through and be latched with the latch groove (271); The locking groove (271) is located in the middle of the locking tongue (210), the side away from the slider (230) is an inclined surface, and the side close to the slider (230) is a vertical surface; A spring is also provided between the latch tongue (270) and the mounting slot, for driving the latch tongue (270) to automatically reset; A matching mounting hole is provided in the middle of the bottom of the mounting groove corresponding to the spring; The latch tongue (270) is provided with a matching docking post corresponding to the spring, and is used for being sleeve-connected with the spring.

10. The four-stage automatic lock according to claim 9, characterized in that: The first plate body (500) and the second plate body (510) are respectively installed at both ends of the panel strip (300), and the first plate body (500) and the second plate body (510) are respectively provided with a first cavity (520) and a second cavity (530), and the first cavity (520) and the second cavity (530) are respectively provided with a second special-shaped gear (620) and a first special-shaped gear (540) rotatably arranged in the first cavity (520) and the second cavity (530), and a transmission gear (550) is also rotatably arranged in the second cavity (530), and a third rack (630) and a first rack (560) are respectively slidably arranged in the first cavity (520) and the second cavity (530), and the first rack One end of the first rack (560) and the third rack (630) is respectively provided with a first mounting member (570) and a second mounting member (640), and the first mounting member (570) and the second mounting member (640) are respectively slidably inserted with a first connecting member (580) and a second connecting member (650), and the first connecting member (580) and the second connecting member (650) are respectively connected to the first rack (560) and the third rack (630), and the first mounting member (570) and the second mounting member (640) are respectively slidably inserted with a sky lock member (600) and a ground lock member (670) on the opposite sides of the first mounting member (570) and the second mounting member (640), and the first mounting member (570) and the second mounting member (640) are respectively A first spring (590) and a second spring (660) are respectively arranged inside the first plate body (500) and the second plate body (510), a second rack (610) is inserted into the first plate body (500) and the second plate body (510), two ends of the second rack (610) are respectively meshed with the second special-shaped gear (620) and the transmission gear (550), the first rack (560) and the third rack (630) are respectively meshed with the first special-shaped gear (540) and the second special-shaped gear (620), the first special-shaped gear (540) is meshed with the transmission gear (550), and a limiting member is arranged on the opposite side of the first mounting member (570) and the second mounting member (640). (680), a locking groove (690) is provided in the first mounting member (570) and the second mounting member (640), and a locking key (700) is slidably provided in the first mounting member (570) and the second mounting member (640), and the two locking keys (700) respectively cooperate with the sky lock member (600) and the ground lock member (670) to resist each other, and the locking key (700) cooperates with the locking groove (690) to be slidably inserted in the locking groove (690), and a third spring (710) is provided in the first mounting member (570) and the second mounting member (640), and the other end of the third spring (710) is fixedly connected to the locking key (700).

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