Lock body unlocking mechanism

Abstract

The present invention discloses a lock body unlocking mechanism, comprising: a self-locking trigger block, a self-locking connecting rod, a connecting rod reset mechanism, a main lock tongue, a main lock tongue reset mechanism, a main lock tongue detection switch and a door lock state monitoring module; the self-locking connecting rod and the main lock tongue have a matching limit structure; the self-locking connecting rod is connected to the self-locking trigger block through the connecting rod reset mechanism, and the connecting rod reset mechanism can provide a restoring force for the self-locking connecting rod to cooperate with the main lock tongue limit; the main lock tongue reset mechanism can provide an outward restoring force for the main lock tongue; the main lock tongue detection switch can detect whether the main lock tongue is in a locked state, and can send the detection result to the door lock state monitoring module. The beneficial effects of this scheme are: 1) the self-locking connecting rod and the main lock tongue groove design prevent the lock tongue from popping out; 2) locking and popping out are more effective, the product stability is improved, and the use time is longer; 3) the main lock tongue pops out automatically after closing the door, which is simple and convenient; 4) there is a detection switch for the extension and retraction of the lock tongue to form a closed loop to ensure safety.

Description

Technical Field

[0001] The present invention relates to the technical field of lock bodies, and in particular to a lock body unlocking mechanism. 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] The self-elastic lock body of the existing structure has the following problems:

[0004] 1) The stability is poor and the lock often fails;

[0005] 2) Traditional locks have no feedback loop, so users cannot learn about the status of the door lock;

[0006] 3) 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;

[0007] 4) Complex structure, high cost and space occupation;

[0008] 5) Difficult to assemble and poor stability. Summary of the invention

[0009] In view of this, the present invention provides a lock body unlocking mechanism, which can effectively lock the main lock tongue and improve stability; simple operation can achieve automatic locking of the door; the extension and retraction of the lock tongue are equipped with a detection switch to form a closed loop to ensure safety.

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

[0011] A lock body unlocking mechanism, comprising: a self-locking trigger block, a self-locking connecting rod, a connecting rod reset mechanism, a main lock tongue, a main lock tongue reset mechanism, a main lock tongue detection switch and a door lock state monitoring module;

[0012] The self-locking connecting rod and the main lock tongue have a matching limiting structure; the self-locking connecting rod is connected to the self-locking trigger block through the connecting rod reset mechanism, and the connecting rod reset mechanism can provide the self-locking connecting rod with a restoring force that matches the main lock tongue limit; the main lock tongue reset mechanism can provide the main lock tongue with an outward restoring force;

[0013] The main lock tongue detection switch can detect whether the main lock tongue is in a locked state, and can send the detection result to the door lock state monitoring module.

[0014] Preferably, it also includes:

[0015] A scissor tongue detection switch for detecting whether the scissor tongue is in a locked state;

[0016] A detection tongue detection switch for detecting whether the detection tongue is in a locked state; both the scissor tongue detection switch and the detection tongue detection switch can send the detection results to the door lock state monitoring module.

[0017] Preferably, it also includes a travel switch bracket; the main lock tongue detection switch, the scissor tongue detection switch and / or the detection tongue detection switch are spring-type contact switches, which are assembled to the travel switch bracket by screws, and the travel switch bracket is fixedly installed on the housing of the lock body;

[0018] Each lock tongue in a locked state can press a corresponding detection switch respectively, and each lock tongue in an unlocked state can release a corresponding detection switch.

[0019] Preferably, it also includes: a scissor tongue support frame, a self-locking trigger block and a trigger block reset mechanism;

[0020] The self-locking trigger block has two states: in the first position, the self-locking trigger block makes the self-locking connecting rod and the main lock tongue in a limited position cooperation; in the second position, the self-locking trigger block makes the self-locking connecting rod disengage from the limited position cooperation with the main lock tongue;

[0021] The trigger block reset mechanism can provide a restoring force for the self-locking trigger block to make it cut from the first position to the second position. The scissors tongue support frame in the pressed state can limit the self-locking trigger block in the first position, and the scissors tongue support frame in the fully popped-up state can allow the self-locking trigger block to cut to the second position.

[0022] Preferably, the limiting structure comprises:

[0023] A main lock tongue groove formed in the main lock tongue;

[0024] A self-locking connecting rod sleeve is arranged at the end of the self-locking connecting rod and is used for limiting cooperation with the main lock tongue groove, and the self-locking connecting rod sleeve and the main lock tongue groove are in rolling friction cooperation.

[0025] Preferably, the self-locking trigger block in the second position can limit the retraction of the scissors tongue support frame, and the main locking tongue can only cooperate with the self-locking connecting rod in a fully retracted state;

[0026] The lock body unlocking mechanism further comprises: an unlocking shifting block, and the unlocking shifting block can switch the self-locking triggering block from the second position to the first position.

[0027] Preferably, the limiting structure comprises:

[0028] A main lock tongue limiting portion provided on the main lock tongue;

[0029] 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;

[0030] 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.

[0031] 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;

[0032] The unlocking block is rotatably mounted on the housing of the lock body via a rotating shaft.

[0033] Preferably, it further comprises: a clutch mechanism, wherein the clutch mechanism comprises:

[0034] A clutch housing, wherein the clutch housing can rotate to activate a main lock tongue activation mechanism;

[0035] A square shaft right drive block rotatably engaged with the door inner side of the clutch housing for engaging with the door inner handle;

[0036] A limiting mechanism fixed to the inner side of the door of the clutch housing, the limiting mechanism being capable of preventing the right driving block of the square shaft from rotating;

[0037] A square shaft left drive block rotatably engaged with the door outer side of the clutch housing and used to engage with the door outer handle;

[0038] A clutch ejector pin is movably disposed in a hole of the clutch housing, and the clutch ejector pin can move along the hole to the first end of the clutch ejector pin to prevent the rotation of the left driving block of the square shaft, which is recorded as a locked position; the clutch ejector pin can also move along the hole to the first end to allow the rotation of the left driving block of the square shaft, which is recorded as an idling position;

[0039] A ejector pin resetting mechanism is provided for providing a resetting force for the clutch ejector pin to maintain the ejector pin in the idle position.

[0040] Preferably, the limiting mechanism is a limiting screw, and the square shaft right driving block has a hook for cooperating with a nut of the limiting screw.

[0041] Preferably, the ejector pin reset mechanism comprises: a retaining spring and a reset spring;

[0042] The second end of the clutch ejector pin has a slot for assembling the retaining spring, the middle portion of the clutch ejector pin has a smooth surface for fitting the return spring, one end of the return spring abuts against the first end of the clutch ejector pin, and the other end is engaged with the retaining spring.

[0043] Preferably, one of the inner wall of the clutch housing and the first end of the clutch ejector pin is provided with a protrusion along the radial direction of the clutch housing, and the other is provided with a groove matched with the protrusion.

[0044] It can be seen from the above technical solutions that the lock body unlocking mechanism provided by the present invention has the following beneficial effects:

[0045] 1) The self-locking connecting rod and the main lock tongue groove design prevents the lock tongue from popping out;

[0046] 2) Locking and ejection are more effective, product stability is improved, and the use time is longer;

[0047] 3) The main lock tongue pops out automatically after the door is closed, which is simple and convenient;

[0048] 4) There is a detection switch for the extension and retraction of the lock tongue to form a closed loop to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] 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.

[0050] Figure 1 A schematic diagram of the structure of a lock body unlocking mechanism in a locked state provided by an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of the structure of a lock body unlocking mechanism in an unlocked state provided by an embodiment of the present invention;

[0052] Figure 3 It is a structural schematic diagram of a travel switch fixing method provided by an embodiment of the present invention;

[0053] Figure 4 is a wiring diagram of a detection switch provided in an embodiment of the present invention;

[0054] Figure 5 A schematic diagram of the structure of the main lock tongue in the unlocked state provided by an embodiment of the present invention;

[0055] Figure 6 A schematic structural diagram of a scissors tongue locking mechanism provided by an embodiment of the present invention;

[0056] Figure 7 An exploded view of a clutch mechanism provided by an embodiment of the present invention;

[0057] Figure 8 A schematic diagram of idling outside a door provided by an embodiment of the present invention;

[0058] Fig. 9 A schematic diagram of the structure of the clutch lock position provided by an embodiment of the present invention;

[0059] Fig.10 A schematic diagram of the structure of a clutch ejector provided in an embodiment of the present invention;

[0060] Fig.11 A schematic diagram of the structure of a clutch housing provided in an embodiment of the present invention;

[0061] Among them, 1 is the lower cover plate; 2 is the compression spring support frame; 3 is the scissor tongue compression spring; 4 is the scissor tongue support frame, 4-1 is the first surface; 5 is the scissor tongue; 6 is the self-locking trigger block, 6-1 is the second surface; 7 is the detection tongue support frame; 8 is the detection tongue; 9 is the self-locking connecting rod, 9-1 is the self-locking connecting rod sleeve; 10 is the unlocking block; 11 is the main lock tongue block; 12 is the main lock tongue, 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 torsion spring; 16 is the self-locking reset spring; 17 is the self-locking spring;

[0062] 21 is a square shaft left driving block;

[0063] 20 is a clutch housing, 20-1 is a bone position of the clutch housing, and 20-2 is a hole of the clutch housing;

[0064] 23 is the right driving block of the square shaft, 24 is the limit screw, and 25 is the retaining spring;

[0065] 26 is a clutch ejector pin, 26-1 is a smooth surface of the clutch ejector pin, 26-2 is a clamping groove of the clutch ejector pin, and 26-3 is a sliding groove of the clutch ejector pin;

[0066] 27 is a return spring, 28 is a motor module, and 29 is a motor shift block;

[0067] 32 is the main lock tongue detection switch, 33 is the main lock tongue travel switch bracket, 34 is the travel switch line, 36 is the scissors tongue detection switch, 41 is the scissors tongue travel switch bracket, 42 is the bracket screw, 43 is the detection switch screw, and 44 is the detection tongue detection switch. DETAILED DESCRIPTION

[0068] 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.

[0069] The lock unlocking mechanism provided in the embodiment of the present invention comprises: a self-locking trigger block 6, a self-locking connecting rod 9, a connecting rod reset mechanism, a main lock tongue 12, a main lock tongue reset mechanism, a main lock tongue detection switch 32 and a door lock state monitoring module, and its structure can refer to Figure 1 As shown, each component is arranged in the housing of the lock body (such as the lower cover 1);

[0070] The self-locking connecting rod 9 and the main lock tongue 12 have a matching limiting structure; the self-locking connecting rod 9 is connected to the self-locking trigger block 6 through a connecting rod reset mechanism, and the connecting rod reset mechanism can provide a restoring force for the self-locking connecting rod 9 to match the limiting position of the main lock tongue 12; the main lock tongue reset mechanism can provide an outward restoring force for the main lock tongue 12;

[0071] The main lock tongue detection switch 32 can detect whether the main lock tongue 12 is in a locked state, and can send the detection result to the door lock state monitoring module to realize door lock state detection.

[0072] It can be seen from the above technical solutions that the lock body unlocking mechanism provided by the embodiment of the present invention can, under the action of the restoring force of the connecting rod reset mechanism, the self-locking connecting rod 9 can cooperate with the main lock tongue 12 to prevent the main lock tongue 12 from extending, thereby locking the main lock tongue 12 and improving stability; when unlocking is required, the self-locking trigger block 6 moves with the self-locking connecting rod 9, so that the self-locking connecting rod 9 and the main lock tongue 12 are separated from the limited cooperation, and the main lock tongue 12 extends outward under the action of the main lock tongue reset mechanism to realize self-elastic unlocking;

[0073] At the same time, the main lock tongue detection switch 32 can output the detection result of whether the main lock tongue 12 is locked, which adds a feedback link so that the user can know the door lock status and ensure safety.

[0074] Preferably, the lock body unlocking mechanism provided in the embodiment of the present invention further includes:

[0075] A scissor tongue detection switch 36 for detecting whether the scissor tongue 5 is in a locked state;

[0076] The detection tongue detection switch 44 is used to detect whether the detection tongue 8 is in a locked state; the scissor tongue detection switch 36 and the detection tongue detection switch 44 can both send the detection results to the door lock state monitoring module. That is, this solution also realizes the detection link of the extension and retraction of the scissor tongue 5 and the detection tongue 8, forming a closed loop to ensure safety. The main lock tongue 12, the scissor tongue 5 and the detection tongue 8 will move left and right in the groove of the lower cover plate 1, so that the detection switch is repeatedly closed, and the information is pushed to the APP to realize the door opening and closing logic.

[0077] Specifically, Figure 4 This is the wiring diagram of the detection switch. The main lock tongue detection switch 32, the scissor tongue detection switch 36 and the detection tongue detection switch 44 are GND and welded into a line. The lock body and the panel are connected with a 4-pin flat cable, and the structure is compact.

[0078] When the door is open, the main lock tongue detection switch 32 is turned on (0), the scissor tongue detection switch 36 is turned on (0), and the detection tongue detection switch 44 is turned on (0); when the door is closed, the main lock tongue detection switch 32 is turned off (1), the scissor tongue detection switch 36 is turned off (1), and the detection tongue detection switch is turned off (1). The state change from opening the door to closing the door is: 000→110→011. Other state changes will feedback errors to serve as a reminder for the user.

[0079]

[0080] Furthermore, the lock unlocking mechanism provided by the embodiment of the present invention further includes: a travel switch bracket; the main lock tongue detection switch 32, the scissor tongue detection switch 36 and / or the detection tongue detection switch 44 are spring-type contact switches, which have a simple structural design; they are assembled to the travel switch bracket by screws, and the detection switch is screwed, with accurate position and high reliability; the travel switch bracket is fixedly installed on the housing of the lock body; here, the three detection switches are respectively assembled to their respective travel switch brackets by screws; the travel switch is a spring-type contact switch, which is directly screwed to the switch bracket, and has a simple structural design, such as Figure 3 , where 5 is the scissor tongue, 4 is the scissor tongue support frame, 3 is the scissor lock tongue compression spring, 2 is the compression spring support frame, 41 is the scissor tongue travel switch bracket, 42 is the bracket screw, and 43 is the detection switch screw. The detection switch is assembled on the travel switch bracket, and then they are locked together on the lower cover 1.

[0081] Each lock tongue in a locked state can press a corresponding detection switch respectively, and each lock tongue in an unlocked state can release a corresponding detection switch. Figure 1 In the door opening state, the main lock tongue 12 presses the main lock tongue detection switch 32, the scissor tongue 5 presses the scissor tongue detection switch 36, and the detection tongue 8 presses the detection tongue detection switch 44; Figure 2 When the door is in the closed state, the main lock tongue 12 is pushed out, the main lock tongue detection switch 32 is released and disconnected, the scissor tongue 5 is pressed down and then extended, the state of the scissor tongue detection switch 36 remains unchanged, the detection tongue 8 is pressed down by the door frame, and the detection tongue detection switch 44 is released and disconnected.

[0082] The lock unlocking mechanism provided in the embodiment of the present invention further includes: a scissor tongue support frame 4 and a trigger block reset mechanism, each of which is arranged in the housing of the lock body (such as the lower cover plate 1);

[0083] The self-locking trigger block 6 has two states: in the first position, the self-locking trigger block 6 makes the self-locking link 9 and the main lock tongue 12 limit the cooperation; in the second position, the self-locking trigger block 6 makes the self-locking link 9 disengage from the limit cooperation with the main lock tongue 12; when the self-locking trigger block 6 switches between the first position and the second position, it will move with the self-locking link 9, so that the self-locking link 9 and the main lock tongue 12 form a limit cooperation, or disengage from the limit cooperation;

[0084] The trigger block reset mechanism can provide a restoring force for the self-locking trigger block 6 to cut from the first position to the second position. The scissors tongue support frame 4 in the pressed state (including the fully pressed state, and partially pressed - i.e., the half-closed state) can limit the self-locking trigger block 6 in the first position. The scissors tongue support frame 4 in the fully popped-up state (i.e., the non-half-closed state) can allow the self-locking trigger block 6 to cut to the second position.

[0085] Figure 1 is 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 2 The self-locking trigger block 6 moves upward under the action of the trigger block reset mechanism, that is, from the first position to the second position, to drive 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 torsion spring 14 to complete the door closing action.

[0086] It can be seen from the above technical solutions that the lock body unlocking mechanism 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 out; the assembly is simple and the stability is good.

[0087] As a preferred embodiment, the trigger block reset mechanism is a self-locking reset spring 16, and its structure can be referred to Figure 1 As shown, the direction is set along the movement direction of the self-locking trigger block 6 between the first position and the second position. Specifically, when the self-locking trigger block 6 is in the first position, the self-locking reset spring 16 is in a compressed state; when the self-locking trigger block 6 is in the second position, the self-locking reset spring 16 is in an extended state. Furthermore, the lock body unlocking mechanism also includes a compression spring support frame 2 for installing the detection tongue support frame 7, the scissor tongue support frame 4 and its lock tongue compression spring 3, and 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 it is integrated into the existing installation structure of the scissor tongue 5 and the detection tongue 8, thereby streamlining the structure and facilitating assembly and maintenance.

[0088] In this embodiment, the connecting rod reset mechanism is a self-locking spring 17, and its structure can be referred to Figure 5As 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, so as to improve the effectiveness of the cooperation and release of the limit between the two, thereby improving the effect of preventing false cover and misfire, and increasing product stability. Furthermore, 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.

[0089] Specifically, the limiting structure includes:

[0090] The main lock tongue groove 12-1 provided in the main lock tongue 12 has a structure as shown in FIG. Figure 5 As shown;

[0091] The self-locking connecting rod sleeve 9-1 is arranged at the end of the self-locking connecting rod 9 and is used to limit the main lock tongue groove 12-1. 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), thereby forming a limiting effect. Of course, the limiting structure can also be in the form of a hook, etc., which will not be described in detail here.

[0092] In order to further optimize the above technical solution, the self-locking connecting rod sleeve 9-1 and the main lock tongue groove 12-1 are rolled and frictionally matched, which has a self-lubricating effect, improves the effectiveness of ejection, increases product stability, and prolongs the service life.

[0093] 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.

[0094] 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.

[0095] In order to further optimize the above technical solution, the self-locking trigger block 6 in the second position can limit the retraction of the scissors tongue support frame 4 to form a scissors tongue locking mechanism; the main lock tongue 12 can only cooperate with the self-locking connecting rod 9 in a fully retracted state;

[0096] The lock unlocking mechanism also includes an unlocking block 10, which can switch the self-locking trigger block 6 from the second position to the first position. Figure 6 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 an arrangement, during the unlocking process, after the main lock tongue 12 is fully retracted, the self-locking trigger block 6 can be cut from the second position to the first 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.

[0097] 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 second position to the first 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 shaft end and the key end cooperate to perform the unlocking action. Its structure can be referred to Figure 1 shown.

[0098] Preferably, the limiting structure includes:

[0099] A main lock tongue limiting portion provided on the main lock tongue 12;

[0100] 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;

[0101] 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 second position to restrict the retraction of the scissors tongue support frame 4.

[0102] Specifically, the main lock tongue limiting part is the main lock tongue groove 12-1, and the connecting rod limiting part is the self-locking connecting rod sleeve 9-1. The structure can refer to the above 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 self-locking connecting rod 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.

[0103] When the main lock tongue 12 is not fully retracted, the main lock tongue groove 12-1 is staggered from the movement trajectory of the self-locking connecting rod sleeve 9-1. At this time, except for the main lock tongue groove 12-1, other parts (specifically a plane) of the matching surface between the main lock tongue 12 and the self-locking connecting rod 9 cannot form a limiting fit with the self-locking connecting rod sleeve 9-1, so that the self-locking trigger block 6 maintains the second position to limit the retraction of the scissors tongue support frame 4.

[0104] The present invention is further described below in conjunction with specific embodiments:

[0105] Figure 5 The main lock tongue is locked. 17 is the self-locking spring, 9-1 is the self-locking connecting rod 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 self-locking connecting rod sleeve 9-1 and the main lock tongue groove 12-1 are rolling friction, which has a self-lubricating effect.

[0106] Figure 1 is 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 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.

[0107] Figure 6 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 5 is released only after the main lock tongue 12 is fully retracted, ensuring residential safety.

[0108] The lock body unlocking mechanism provided in the embodiment of the present invention further includes: a clutch mechanism, the clutch mechanism including:

[0109] The clutch housing 20 can rotate to toggle the main lock tongue toggle mechanism, thereby retracting the main lock tongue and unlocking the door lock;

[0110] A square shaft right drive block 23 that can be rotatably matched with the inner door side of the clutch housing 20 and is used to match with the inner door handle; the outer side of the square shaft right drive block 23 is provided with a square shaft groove for matching with the inner door handle, and the inner side has a surface for rotatably matching with the clutch housing 20; the inner door handle can provide axial limit for the square shaft right drive block 23;

[0111] A limiting mechanism fixed to the inner side of the door of the clutch housing 20, which can prevent the rotation of the square shaft right drive block 23;

[0112] A square shaft left driving block 21 that can be rotatably matched with the door outer side of the clutch housing 20 and is used to cooperate with the door outer handle; the outer side of the square shaft left driving block 21 is provided with a square shaft groove for cooperating with the door outer handle, and the inner side has a surface for rotatably cooperating with the clutch housing 20; the door outer handle can provide axial limit for the square shaft left driving block 21; it can be understood that the "left", "right", "inside" and "outside" in this scheme are for the convenience of describing and understanding the relative position relationship of the two square shaft driving blocks, and do not limit their assembly method and structure, the same below;

[0113] The clutch ejector pin 26 is movably disposed in the hole 20-2 of the clutch housing 20, and the clutch ejector pin 26 can move along the hole 20-2 to the first end of the clutch ejector pin 26 to prevent the rotation of the square shaft left driving block 21, which is recorded as a locked position; the clutch ejector pin 26 can also move along the hole 20-2 to the first end to allow the rotation of the square shaft left driving block 21, which is recorded as an idling position;

[0114] A reset mechanism that provides a reset force for the clutch ejector pin 26 to keep it in an idle position.

[0115] As mentioned above, the structural design Figure 1 and Figure 7 As shown, by installing a limit mechanism on the inner side of the door of the clutch housing 20, the inner door handle can drive the square shaft right drive block 23 to drive the clutch housing 20 to move together, and the rotational movement of the clutch housing 20 will drive the movement of the main lock tongue toggle mechanism, thereby realizing the retraction of the main lock tongue;

[0116] Under normal conditions outside the door, the clutch ejector pin 26 is in a drooping idling position, and the door handle outside drives the square shaft left drive block 21, but cannot drive the clutch housing 20, and can only idling. Figure 8 Only when the clutch ejector pin 26 is driven to retract, the door handle outside drives the square shaft left drive block 21, which first contacts the clutch ejector pin 26 during the movement, and then drives the clutch housing 20 to rotate, thereby realizing the retraction of the main lock tongue, which is similar to opening the door with the door handle inside. Fig. 9 .

[0117] It can be seen from the above technical solution that the clutch mechanism provided by the present invention drives the clutch housing 20 to rotate through the clutch ejector pin 26, thereby driving the movement of the main lock tongue toggle mechanism to realize the extension and retraction movement of the main lock tongue; this mechanism cooperates with the inner door handle and the outer door handle to realize the separation of the drive of the inner and outer door handles, has a modular design, occupies less space, and has a simple structure and saves costs.

[0118] As a preferred embodiment, the limiting mechanism is a limiting screw 24, which is easy to install and has a firm structure; the square shaft right drive block 23 has a hook for cooperating with the nut of the limiting screw 24, which helps to maintain the matching relationship between the two, expand the contact area, and improve the reliability of the limit. Its structure can refer to Figure 1 and Figure 7 shown.

[0119] In this embodiment, the reset mechanism includes: a clamping spring 25 and a reset spring 27, and its structure can be referred to in Figure 7 and Figure 8 As shown;

[0120] The second end of the clutch ejector pin 26 has a slot 26-2 for assembling the retaining spring 25. The middle of the clutch ejector pin 26 has a smooth surface 26-1 for mounting the return spring 27. One end of the return spring 27 abuts against the first end of the clutch ejector pin 26, and the other end is engaged with the retaining spring 25. The structure can be referred to Fig.10 As shown. The return spring 27 is installed through the retaining spring 25 (preferably E-type), which has a simple structure and saves costs. Specifically, the first end of the clutch ejector pin 26 is a large head structure, and its cross-sectional size is larger than the radial size of the hole 20-2, which can provide an installation limit for one end of the return spring 27 and an installation limit for the clutch ejector pin 26 to prevent it from slipping out of the hole 20-2.

[0121] In order to further optimize the above technical solution, one of the inner wall of the clutch housing 20 and the first end of the clutch ejector pin 26 is provided with a protrusion along the radial direction of the clutch housing 20, and the other is provided with a groove matched with the protrusion. It can be understood that the radial direction of the clutch housing 20 refers to its rotational motion mode. Compared with the point-line contact matching structure in the prior art, the clutch ejector pin 26 of this embodiment is in large-surface contact with the clutch housing 20, which has less wear and a longer service life.

[0122] Specifically, the inner wall of the clutch housing 20 is provided with a bone position 20-1 as the aforementioned protrusion, and the first end of the clutch ejector pin 26 is provided with a slide groove 26-3 as the aforementioned groove. Fig.10 and Fig.11 During the movement, the bone position 20-1 of the clutch housing moves in the slide groove 26-3 of the clutch ejector pin without being skewed, thereby improving stability.

[0123] The lock body clutch mechanism provided in the embodiment of the present invention further includes a driving module for driving the clutch ejector pin 26 to move to a locked position, so as to realize automatic control according to preset instructions.

[0124] Preferably, the driving module comprises:

[0125] The motor shift block 29 for shifting the clutch ejector pin 26 can be referred to in its structure. Figure 8 As shown;

[0126] The motor module 28 is used to drive the motor shift block 29. Only after the motor rotates, the motor shift block 29 moves up to retract the clutch ejector pin 26, and the door handle drives the square shaft left drive block 21, which first contacts the clutch ejector pin 26 during the movement, and then drives the clutch housing 20 to rotate, thereby realizing the retraction of the main lock tongue, which is similar to the door opening by the door handle.

[0127] In order to further optimize the above technical solution, the clutch housing 20 has a hook for cooperating with the main lock tongue toggle mechanism, which helps to maintain the matching relationship between the two, expand the contact area, and improve the reliability of the toggle. Figure 1 , Figure 7-Figure 9 In this embodiment, the main lock tongue shifting mechanism comprises: a main lock tongue shifting block 11.

[0128] Specifically, the first end of the clutch ejector pin 26 in the locked position can also prevent the rotation of the square shaft right drive block 23, and the first end of the clutch ejector pin 26 in the idle position can also allow the rotation of the square shaft right drive block 23. Then the inner door handle can also achieve the cooperation with the clutch ejector pin 26 similar to the outer door handle, which is convenient for operation.

[0129] The embodiment of the present invention further provides a lock body, including a clutch mechanism, which is the lock body clutch mechanism described above. The inner door handle cooperates with the square shaft groove of the square shaft right drive block 23 to provide axial limit; the outer door handle cooperates with the square shaft groove of the square shaft left drive block 21 to provide axial limit.

[0130] The present invention is further described below in conjunction with specific embodiments:

[0131] Figure 7 The limit screw 24 is installed in the door, so that the door handle can drive the square shaft right drive block 23 to drive the clutch housing 20 to move together, and the rotation of the clutch housing 20 will drive the movement of the main lock tongue block 10, so as to achieve the retraction of the main lock tongue and open the door lock. Figure 1 .

[0132] Under normal conditions outside the door, the clutch pin 26 droops, and the door handle drives the left drive block 21 of the square shaft, but cannot drive the clutch housing 20, and can only idle. Figure 8 Only after the motor rotates, the motor shift block 29 moves up, the clutch ejector pin 26 retracts, and the handle drives the square shaft drive block, which first contacts the clutch ejector pin 26 during the movement, and then drives the clutch housing 20 to rotate, thereby realizing the retraction of the main lock tongue, which is similar to opening the door with the door handle inside. Fig. 9 .

[0133] Installation of the clutch: first install the clutch ejector pin 26 into the hole 20-2 of the clutch housing, insert the return spring 27 into the smooth surface 26-1 of the ejector pin, then install the retaining spring 25 into the slot 26-2 of the ejector pin, and finally install the left and right drive blocks to complete the assembly. During the movement, the bone position 20-1 of the clutch housing moves in the slide slot 26-3 of the clutch ejector pin and will not be skewed.

[0134] To sum up, the embodiment of the present invention discloses a lock body clutch mechanism, which drives the clutch housing to rotate through the clutch ejector pin, thereby driving the movement of the main lock tongue toggle mechanism to realize the extension and retraction movement of the main lock tongue; this mechanism cooperates with the inner door handle and the outer door handle to realize the separation of the drive of the inner and outer door handles, has a modular design, occupies less space, is easy to assemble, and saves costs; has large surface contact, less wear, and long service life.

[0135] 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.

[0136] 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 lock body unlocking mechanism, characterized in that: include: A self-locking trigger block (6), a self-locking connecting rod (9), a connecting rod reset mechanism, a main lock tongue (12), a main lock tongue reset mechanism, a main lock tongue detection switch (32) and a door lock state monitoring module; The self-locking connecting rod (9) and the main lock tongue (12) have a matching limiting structure; the self-locking connecting rod (9) is connected to the self-locking trigger block (6) via the connecting rod reset mechanism, and the connecting rod reset mechanism can provide the self-locking connecting rod (9) with a restoring force that matches the limiting position of the main lock tongue (12); the main lock tongue reset mechanism can provide the main lock tongue (12) with a restoring force that extends outward; The connecting rod reset mechanism is a self-locking spring (17), 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); the movement direction of the self-locking trigger block (6) is the same as the movement direction of the self-locking connecting rod (9); The main lock tongue detection switch (32) is capable of detecting whether the main lock tongue (12) is in a locked state, and is capable of sending the detection result to the door lock state monitoring module; The lock body unlocking mechanism also includes: A scissor tongue detection switch (36) for detecting whether the scissor tongue (5) is in a locked state; a detection tongue detection switch (44) for detecting whether the detection tongue (8) is in a locked state; the scissor tongue detection switch (36) and the detection tongue detection switch (44) are both capable of sending detection results to the door lock state monitoring module; The lock body unlocking mechanism further comprises: a scissor tongue support frame (4) and a trigger block resetting mechanism; The self-locking trigger block (6) has two states: in a first position, the self-locking trigger block (6) causes the self-locking connecting rod (9) and the main lock tongue (12) to be in a limited position fit; in a second position, the self-locking trigger block (6) causes the self-locking connecting rod (9) to be out of the limited position fit with the main lock tongue (12); The trigger block reset mechanism can provide a restoring force for the self-locking trigger block (6) to move it from the first position to the second position; the scissor tongue support frame (4) in a pressed state can limit the self-locking trigger block (6) at the first position; when the scissor tongue (5) is pressed but not fully in place after being ejected, the main locking tongue (12) will not eject; the scissor tongue support frame (4) in a fully ejected state can allow the self-locking trigger block (6) to be cut to the second position; The self-locking trigger block (6) in the second position can limit the retraction of the scissor tongue support frame (4), and the main locking tongue (12) can only cooperate with the self-locking connecting rod (9) in a fully retracted state; The lock body unlocking mechanism further comprises: an unlocking block (10), wherein the unlocking block (10) is capable of switching the self-locking trigger block (6) from the second position to the first position; after the main lock tongue (12) is fully retracted, the self-locking trigger block (6) can be switched from the second position to the first position, and the retraction of the scissor tongue support frame (4) is no longer restricted, so that the scissor tongue (5) is released; The limiting structure comprises: A main lock tongue groove (12-1) formed on the main lock tongue (12); A self-locking connecting rod sleeve (9-1) is arranged at the end of the self-locking connecting rod (9) and is used for limited engagement with the main locking tongue groove (12-1), and the self-locking connecting rod sleeve (9-1) and the main locking tongue groove (12-1) are engaged in rolling friction.

2. The lock body unlocking mechanism according to claim 1, characterized in that: The arrangement direction of the self-locking spring (17) is perpendicular to the movement direction of the main locking tongue (12).

3. The lock body unlocking mechanism according to claim 1, characterized in that: The trigger block reset mechanism is a self-locking reset spring (16), the direction of which is arranged along the movement direction of the self-locking trigger block (6) between the first position and the second position.

4. The lock body unlocking mechanism according to claim 1, characterized in that: Also includes: Travel switch bracket; The main lock tongue detection switch (32), the scissor tongue detection switch (36) and / or the detection tongue detection switch (44) are spring-type contact switches, which are assembled to the travel switch bracket by screws, and the travel switch bracket is fixedly mounted on the housing of the lock body; Each lock tongue in a locked state can press a corresponding detection switch respectively, and each lock tongue in an unlocked state can release a corresponding detection switch.

5. The lock body unlocking mechanism according to claim 1, characterized in that: 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; Furthermore, when the main lock tongue (12) is in a fully retracted state, the main lock tongue limiting portion is located within the movement trajectory of the connecting rod limiting portion; and when the main lock tongue (12) is in a partially retracted state, the movement trajectories of the main lock tongue limiting portion and the connecting rod limiting portion are staggered.

6. The lock body unlocking mechanism according to claim 1, characterized in that: 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 second position to the first position; The unlocking block (10) is rotatably mounted on the housing of the lock body via a rotating shaft.

7. The lock body unlocking mechanism according to claim 1, characterized in that: Also includes: A clutch mechanism, the clutch mechanism comprising: A clutch housing (20), wherein the clutch housing (20) is capable of rotating to toggle a main lock tongue toggle mechanism; A square shaft right drive block (23) rotatably engaged with the inner side of the door of the clutch housing (20) and adapted to engage with the inner door handle; A limiting mechanism fixed to the inner side of the door of the clutch housing (20), the limiting mechanism being capable of preventing the square shaft right driving block (23) from rotating; A square shaft left drive block (21) rotatably engaged with the door outer side of the clutch housing (20) and adapted to engage with the door outer handle; A clutch ejector pin (26) is movably arranged in a hole (20-2) of the clutch housing (20), and the clutch ejector pin (26) can move along the hole (20-2) to the first end of the clutch ejector pin (26) to prevent the rotation of the square shaft left drive block (21), which is recorded as a locked position; the clutch ejector pin (26) can also move along the hole (20-2) to the first end to allow the rotation of the square shaft left drive block (21), which is recorded as an idle position; A pin reset mechanism is provided for providing a reset force for the clutch pin (26) so that the pin maintains the idle position.

8. The lock body unlocking mechanism according to claim 7, characterized in that: The limiting mechanism is a limiting screw (24), and the square shaft right driving block (23) has a hook for cooperating with a nut of the limiting screw (24).

9. The lock body unlocking mechanism according to claim 7, characterized in that: The ejector pin reset mechanism comprises: a retaining spring (25) and a reset spring (27); The second end of the clutch ejector pin (26) has a slot (26-2) for assembling the retaining spring (25), and the middle portion of the clutch ejector pin (26) has a smooth surface (26-1) for fitting the return spring (27), one end of the return spring (27) abuts against the first end of the clutch ejector pin (26), and the other end is engaged with the retaining spring (25).

10. The lock body unlocking mechanism according to claim 7, characterized in that: One of the inner wall of the clutch housing (20) and the first end of the clutch ejector pin (26) is provided with a protrusion along the radial direction of the clutch housing (20), and the other is provided with a groove matching the protrusion.

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