lock body

Abstract

The application discloses a lock body, which comprises a lock shell, a main lock tongue mechanism, a locking element, a reset elastic member and a latch mechanism. The latch mechanism comprises a latch main body, a first elastic member, a rotating sleeve, a latch accessory and a second elastic member. The latch main body is connected with a latch part and a rod part. The first elastic member is matched with the latch main body. The rotating sleeve can rotate around the axis of the rod part and can drive the rotating sleeve to axially slide synchronously when the latch main body slides. The rotating sleeve is provided with a driving part which is used for matching with the locking element. The latch accessory is connected with a small tongue part and a mounting part. The mounting part is slidably arranged on the latch main body. A guide groove and a guide block which extends into the guide groove are arranged between the mounting part and the rotating sleeve. When the rotating sleeve moves axially relative to the latch accessory, the guide groove and the guide block can make the rotating sleeve rotate relative to the latch accessory, so that the position of the driving part is changed. The second elastic member is directly or indirectly matched with the latch accessory and is used for making the latch accessory have a movement tendency of moving to the outside of the lock shell. The lock body structure is more compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of locks, in particular to a lock body. BACKGROUND

[0002] The most traditional mortise lock cannot automatically pop out the main bolt after each time of closing the door, and needs to be pulled up by the handle to make the main bolt extend.

[0003] In order to realize the automatic pop-out of the main bolt, the existing mechanical lock sets a structure capable of automatically pop-out the main bolt mechanism under the action of the elastic member, and the main bolt mechanism is locked by the locking element in the open door state, after closing the door, the locking element is unlocked by the latch mechanism, so that the main bolt mechanism is automatically popped out under the action of the elastic member, realizing the locking action. The patent document with publication number CN 105113856 A discloses a latch mechanism capable of realizing the automatic unlocking of the main bolt mechanism after closing the door.

[0004] However, the latch mechanism of the above patent document has a relatively complex structure, the latch assembly and the trigger tongue assembly are arranged side by side with an upward interval, resulting in a relatively large space occupation and an uncompact lock body structure. SUMMARY

[0005] The present application proposes a lock body aiming at the above problems.

[0006] The technical scheme adopted by the present application is as follows:

[0007] A lock body for cooperating with a clamping plate installed on a door frame, the lock body comprising:

[0008] a lock shell;

[0009] a main bolt mechanism installed on the lock shell;

[0010] a locking element movably installed on the lock shell and used for locking or unlocking the main bolt mechanism, the locking element having an avoiding opening on one side and having a locking state and an unlocking state;

[0011] a reset elastic member installed on the lock shell and used for resetting the locking element; and

[0012] a latch mechanism installed on the lock shell;

[0013] the latch mechanism comprising:

[0014] a latch main body slidingly arranged in the lock shell, the latch main body having a latch portion and a rod portion connected with each other;

[0015] a first elastic member arranged in the lock shell and used for directly or indirectly cooperating with the latch main body to make the latch main body have a movement tendency to move outward of the lock shell;

[0016] A rotating sleeve is rotatably mounted on the tongue portion or / and the rod portion, and can rotate around the axis of the rod portion and synchronously slide axially with the tongue body. The rotating sleeve has a notch and a driving portion for cooperating with the locking element;

[0017] A tongue accessory has a small tongue portion and a mounting portion. The mounting portion is slidably arranged on the rod portion of the tongue body, and the tongue body can drive the tongue accessory to move into the lock case when the tongue body slides into the lock case. The mounting portion is mounted on the outer side of the rod portion, and the rotating sleeve is sleeved on the outer side of the mounting portion. The small tongue portion penetrates through the notch. A guide structure is arranged between the mounting portion and the rotating sleeve, and includes a guide groove and a guide block extending into the guide groove. One of the guide groove and the guide block is arranged on the tongue accessory, and the other is arranged on the rotating sleeve. The guide structure can rotate the rotating sleeve relative to the tongue accessory when the rotating sleeve moves axially relative to the tongue accessory, so as to change the position of the driving portion.

[0018] A second elastic member directly or indirectly cooperates with the tongue accessory, and is used to make the tongue accessory have a movement tendency of moving out of the lock case.

[0019] The tongue mechanism has an open door state, a closed door non-positioning state and a closed door positioning state.

[0020] When the tongue mechanism is in the open door state, the tongue portion of the tongue body and the small tongue portion of the tongue accessory extend out of the lock case. The locking element is in a locking state, and the driving portion penetrates through the avoiding opening.

[0021] When the tongue mechanism is in the closed door non-positioning state, the tongue portion of the tongue body is pressed to move into the lock case and retract. The tongue accessory also moves into the lock case and retracts under the driving of the tongue body.

[0022] When the tongue mechanism is in the closed door positioning state, the small tongue portion of the tongue accessory abuts against the buckle plate. The tongue body slides out of the lock case under the action of the first elastic member. The tongue body synchronously drives the rotating sleeve to move when sliding. The rotating sleeve rotates under the action of the guide groove and the guide block which cooperate with each other when the rotating sleeve moves relative to the mounting portion. The position of the driving portion is changed. The driving portion after the position is changed contacts the locking element during the movement in the axial direction of the tongue body, so that the locking element is switched from the locking state to the unlocking state.

[0023] The guide groove at least includes a guide portion which is not parallel to the axis of the rod portion. The guide block moves at least a distance in the guide portion during the tongue mechanism is switched from the closed door non-positioning state to the closed door positioning state.

[0024] The latch tongue accessory is slidably arranged on the latch tongue body, which can make the structure more compact compared with the structure that the prior art latch tongue assembly and the trigger tongue assembly are arranged side by side, and the rotation of the rotating sleeve can be realized through the guide block, so that the driving part can be in contact with the locking element after the door is closed to the position, and the locking element is switched from the locked state to the unlocked state.

[0025] In one of the embodiments of the present application, the mounting portion is slidably mounted on the rod portion, and the mounting portion is abutted against the latch tongue portion when the latch tongue mechanism is in the door opening state.

[0026] The guide groove is arranged on the rotating sleeve, and the guide block is arranged on the mounting portion.

[0027] The outer side wall of the rod portion has a limiting portion, the rotating sleeve is sleeved on the rod portion, and is located between the latch tongue portion and the limiting portion.

[0028] The first elastic member is a spring, a tension spring or a torsion spring, one end of the first elastic member is matched with the lock shell, and the other end is directly or indirectly matched with the rod portion.

[0029] The second elastic member is a spring, the second elastic member is sleeved on the rod portion, one end of the second elastic member is matched with the mounting portion, and the other end is matched with the rotating sleeve or the rod portion.

[0030] In one of the embodiments of the present application, the latch tongue portion has a pressure-receiving retraction surface and a thrust surface, the pressure-receiving retraction surface is an inclined surface or an arc surface, the thrust surface has a sliding groove, and the small tongue portion is slidably matched with the sliding groove.

[0031] The small tongue portion has a portion protruding from the sliding groove, and when the latch tongue mechanism is in the door closing to the position state, the end surface of the portion protruding from the sliding groove of the small tongue portion is in contact with the buckling plate.

[0032] In one of the embodiments of the present application, one end of the small tongue portion away from the mounting portion has a protruding block protruding from the sliding groove, the lock shell has a avoiding groove for embedding the protruding block, when the latch tongue mechanism is in the door closing to the position state, the protruding block abuts against the buckling plate, and at least part of the protruding block is embedded in the avoiding groove.

[0033] In one of the embodiments of the present application, one side of the protruding block close to the mounting portion has an inclined or arc-shaped first guide surface, the farther the protruding block is from the sliding groove, the smaller the thickness of the protruding block is; and the avoiding groove has a second guide surface matched with the first guide surface.

[0034] In one of the embodiments of the present application, the buckling plate has a limiting hole for clamping the latch tongue body, and the buckling plate further has a protruding portion extending into the limiting hole; the small tongue portion is completely embedded in the sliding groove, and when the latch tongue mechanism is in the door closing to the position state, the latch tongue body extends into the limiting hole and the small tongue portion is in contact with the protruding portion.

[0035] In one of the embodiments of the present application, the guide groove further comprises a first part and a second part, the first part, the guide part and the second part are connected in sequence;

[0036] In the door opening state and the door closing misalignment state, the guide block is located at the first part or the intersection of the first part and the guide part;

[0037] In the door closing alignment state, the guide block is located at the second part or the intersection of the second part and the guide part.

[0038] In one of the embodiments of the present application, the main lock tongue mechanism comprises:

[0039] The main lock tongue body is slidably arranged on the lock shell, and has a main lock tongue part and a main lock tongue plate connected with each other, the main lock tongue plate has a driving groove, and the main lock tongue body has an extended state and a retracted state;

[0040] The main lock tongue driving block is rotatably arranged on the lock shell, and can rotate around a first rotation axis, the main lock tongue driving block has a driving block extending into the driving groove, and the main lock tongue body can be driven to slide by cooperation between the driving block and the driving groove when the main lock tongue driving block rotates, the main lock tongue driving block has a first position and a second position, the main lock tongue body is in the extended state when the main lock tongue driving block is in the first position, and the main lock tongue body is in the retracted state when the main lock tongue driving block is in the second position;

[0041] The pulling rack is slidably arranged on the lock shell, and is used for directly or indirectly engaging with the main lock tongue driving block, the pulling rack can drive the main lock tongue driving block to rotate when the pulling rack slides, the pulling rack has a locking position and a release position, the main lock tongue driving block is in the second position when the pulling rack is in the locking position, and the main lock tongue driving block is in the first position when the pulling rack is in the release position, the pulling rack has a locking part, the locking part is used for cooperating with the locking element, the pulling rack cannot slide when the locking element locks the locking part, and the pulling rack can slide to the release position after being forced when the locking element does not lock the locking part;

[0042] The main lock tongue ejection elastic member is arranged in the lock shell and cooperates with the pulling rack, and is used for driving the pulling rack to slide to the release position when the locking element does not lock the locking part;

[0043] A rotating knob is installed on the lock housing and is fixed opposite to the main lock tongue knob and can rotate synchronously with the main lock tongue knob. The rotating knob has a first matching part near the first rotating axis.

[0044] A lock cylinder is installed on the lock housing. The lock cylinder has a lock head cam with an initial position and an unlocking position.

[0045] A lock head knob is movably installed on the lock housing. The lock head knob has a pressure part and a second matching part. The pressure part is located on one side of the lock cylinder and is adjacent to the lock head cam.

[0046] During the rotation of the lock head cam from the initial position to the unlocking position, the lock head cam is in contact with the pressure part to drive the lock head knob to move. After the movement of the lock head knob, the second matching part is in contact with the first matching part to drive the rotating knob and the main lock tongue knob to rotate synchronously, so that the main lock tongue body is switched from the extended state to the retracted state, and the main lock tongue knob drives the pulling rack to slide to the locking position and is locked with the locking element.

[0047] In one embodiment of the present application, the rotating knob further has a third matching part. The third matching part and the first matching part are located on the same side of the first rotating axis, and the distance between the third matching part and the first rotating axis is greater than the distance between the first matching part and the first rotating axis.

[0048] The lock head knob has a fourth matching part matched with the third matching part.

[0049] During the rotation of the lock head cam from the initial position to the unlocking position, the lock head cam is in contact with the pressure part to drive the lock head knob to move. At the beginning, the fourth matching part of the lock head knob is in contact with the third matching part to drive the rotating knob to rotate. Then, the fourth matching part is no longer in contact with the third matching part, but the second matching part is in contact with the first matching part to continue driving the rotating knob to rotate, so that the main lock tongue body is switched from the extended state to the retracted state, and the main lock tongue knob drives the pulling rack to slide to the locking position and is locked with the locking element.

[0050] In one embodiment of the present application, the main lock tongue knob has a tooth part, the pulling rack is engaged with the tooth part, or the main lock tongue mechanism further includes a transmission member rotatably installed on the lock housing. The transmission member is fixed opposite to the main lock tongue knob and can rotate synchronously with the main lock tongue knob. The transmission member has a tooth part, and the pulling rack is engaged with the tooth part.

[0051] The latch bolt mechanism has an extended state and a retracted state. The lock body further includes:

[0052] The handle shaft is rotatably installed on the lock shell and is used for installing the handle.

[0053] The handle knob is installed on the handle shaft and can rotate relative to the handle shaft. The handle knob has a fifth matching part and a sixth matching part. The fifth matching part matches with the rod part of the latch bolt mechanism, and is used for switching the latch bolt mechanism from the extended state to the retracted state.

[0054] The lock head knob also has an unlocking part. During the process that the lock head cam rotates from the initial position to the unlocking position, the lock head cam is in contact with the pressure part, drives the lock head knob to move, and after the lock head knob moves, the main lock tongue body is switched from the extended state to the retracted state, the main lock tongue knob drives the pulling rack to slide to the locking position and is locked with the locking element, the unlocking part is in abutment with the sixth matching part to rotate the handle knob, and finally the fifth matching part of the handle knob switches the latch bolt mechanism from the extended state to the retracted state.

[0055] The application has the advantages that the latch bolt accessory is slidably arranged on the latch bolt body, the structure is more compact compared with the structure that the trigger tongue assembly and the latch bolt assembly are arranged side by side in the prior art, the rotation of the rotating sleeve can be realized through the guide block, and therefore after the door is closed to the position, the driving part can be in contact with the locking element to switch the locking element from the locking state to the unlocking state. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 is a schematic view of the buckle plate, the lock shell and the latch bolt mechanism;

[0057] Figure 2 is a front view of the latch bolt mechanism;

[0058] Figure 3 is Figure 2 is the A-A sectional view in the middle;

[0059] Figure 4 is a schematic view of the latch bolt body, the latch bolt accessory box and the rotating sleeve;

[0060] Figure 5 is a schematic view of the locking element, the reset elastic member and the latch bolt mechanism;

[0061] Figure 6 is an exploded view of the locking element, the reset elastic member and the latch bolt mechanism;

[0062] Figure 7 is a schematic view of the buckle plate and the lock shell when the latch bolt mechanism is in the door closed to the position state;

[0063] Figure 8 is a schematic view of the buckle plate and the lock shell when the latch bolt mechanism is in the door closed to the position state;

[0064] Figure 9 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0065] Figure 10 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0066] Figure 11 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0067] Figure 12 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0068] Figure 13 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0069] Figure 14 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0070] Figure 15 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state;

[0071] Figure 16 is a schematic view of the other angle of the strike plate and the lock body when the latch bolt is in the closed out of position state; Figure 15

[0072] Figure 17

[0073] Figure 18

[0074] Figure 19

[0075] Figure 20

[0076] Figure 21

[0077] Figure 22

[0078] Figure 23

[0079] The reference signs in the drawings are as follows:

[0080] ​​​​​​​​1, buckle plate; 11, limiting hole; 12, convex part; 2, lock shell; 21, avoiding groove; 211, second guide surface; 3, latch mechanism; 31, latch main body; 311, latch part; 3111, pressure-receiving retraction surface; 3112, thrust surface; 31121, sliding groove; 312, rod part; 3121, limiting part; 32, first elastic member; 33, rotating sleeve; 331, driving part; 332, notch; 333, guide groove; 3331, guide part; 3332, first part; 3333, second part; 34, latch accessory; 341, small tongue part; 3411, convex block; 34111, first guide surface; 342, mounting part; 3421, guide block; 35, second elastic member; 4, main latch mechanism; 41, main latch body; 411, main latch part; 412, main latch plate; 4121, driving groove; 42, main latch driving block; 421, driving block; 43, first rotation axis; 44, pulling rack; 441, locking part; 45, main latch ejection elastic member; 46, transmission member; 461, tooth part; 47, rotating driving piece; 471, first matching part; 472, third matching part; 48, lock cylinder; 481, lock head cam; 49, lock head driving piece; 491, pressure-receiving part; 492, second matching part; 493, fourth matching part; 494, unlocking part; 5, locking element; 51, avoiding opening; 6, reset elastic member; 71, handle shaft; 72, handle driving piece; 721, fifth matching part; 722, sixth matching part. DETAILED DESCRIPTION

[0081] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0082] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second” and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0083] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0084] The present invention will now be described in detail with reference to the accompanying drawings.

[0085] Example 1

[0086] like Figures 1-20 As shown, this embodiment discloses a lock body for cooperating with a strike plate 1 installed on a door frame.

[0087] like Figure 8 As shown, the lock body includes a lock housing 2, a latch mechanism 3, a main latch mechanism 4, and a locking element 5 movably mounted on the lock housing 2. The locking element 5 is used to lock or unlock the main latch mechanism 4.

[0088] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the oblique tongue mechanism 3 includes:

[0089] The latch body 31 is slidably disposed in the lock housing 2. The latch body 31 has a latch portion 311 and a rod portion 312 that are connected to each other.

[0090] The first elastic element 32 is provided in the lock housing 2 and is used to directly or indirectly cooperate with the latch body 31 to make the latch body 31 have a tendency to move outward of the lock housing 2.

[0091] Rotating sleeve 33 is rotatably mounted on the tongue portion 311 and / or the rod portion 312. Rotating sleeve 33 can rotate around the axis of the rod portion 312. When the tongue body 31 slides, it can drive the rotating sleeve 33 to slide synchronously axially. Rotating sleeve 33 has a driving part 331, which is used to cooperate with the locking element 5.

[0092] The latch tongue accessory 34 has a small tongue part 341 and a mounting part 342, the mounting part 342 is slidingly arranged on the latch tongue body 31 and can move into the lock shell 2 together with the latch tongue body 31, the mounting part 342 and the rotating sleeve 33 are provided with a guide structure, the guide structure includes a guide groove 333 and a guide block 3421 extending into the guide groove 333, one of the guide groove 333 and the guide block 3421 is arranged on the latch tongue accessory 34, and the other is arranged on the rotating sleeve 33, the guide structure is used to rotate the rotating sleeve 33 relative to the latch tongue accessory 34 when the rotating sleeve 33 moves axially relative to the latch tongue accessory 34, so as to change the position of the driving part 331; and

[0093] The second elastic member 35 directly or indirectly cooperates with the latch tongue accessory 34, and is used to make the latch tongue accessory 34 have a movement trend of moving outwardly from the lock shell 2;

[0094] The latch tongue mechanism 3 has an open door state, a door closing non-positioning state and a door closing positioning state, and the locking element 5 has a locking state and an unlocking state;

[0095] When the latch tongue mechanism 3 is in the open door state, as shown in Figure 1 , the latch tongue part 311 of the latch tongue body 31 extends out of the lock shell 2, the small tongue part 341 of the latch tongue accessory 34 extends out of the lock shell 2, the locking element 5 is in the locking state, and the driving part 331 is staggered with the locking element 5;

[0096] When the latch tongue mechanism 3 is in the door closing non-positioning state, as shown in Figure 8 and Figure 9 , the latch tongue part 311 of the latch tongue body 31 is pressed to move inwardly and retract into the lock shell 2, and the latch tongue accessory 34 is also moved inwardly and retracts into the lock shell 2 under the driving of the latch tongue body 31;

[0097] When the latch tongue mechanism 3 is in the door closing positioning state, as shown in Figures 11-14 , the small tongue part 341 of the latch tongue accessory 34 abuts against the buckle plate 1, the latch tongue body 31 slides out of the lock shell 2 under the action of the first elastic member 32, and the latch tongue body 31 will synchronously drive the rotating sleeve 33 to move when sliding, the rotating sleeve 33 rotates under the action of the mutually matched guide groove 333 and guide block 3421 when moving relative to the mounting part 342, the position of the driving part 331 is changed, and the driving part 331 after changing the position will contact the locking element 5 during moving in the axial direction of the latch tongue body 31, so as to switch the locking element 5 from the locking state to the unlocking state.

[0098] The oblique tongue attachment 34 of this application is slidably disposed on the oblique tongue body 31. Compared with the prior art structure in which the trigger tongue assembly and the oblique tongue assembly are arranged side by side, the structure can be made more compact. The present application can realize the rotation of the rotating sleeve 33 through the guide block 3421, so that after the door is closed, the drive part 331 can contact the locking element 5, so that the locking element 5 switches from the locked state to the unlocked state.

[0099] In practical applications, the locking element 5 can be rotatably installed inside the lock housing 2, or it can be slidably installed inside the lock housing 2. In this embodiment, it is a rotatable fit.

[0100] like Figure 1 The lock body also has a reset elastic element 6 for resetting the locking element 5.

[0101] In this embodiment, the mounting part 342 is slidably mounted on the rod part 312. When the latch mechanism 3 is in the open state, the mounting part 342 abuts against the latch part 311. There are various ways to slide the mounting part 342, such as by sleeve or by using a track.

[0102] like Figure 1 and Figure 6 As shown, the locking element 5 has a clearance opening 51 on one side. When the latch mechanism 3 is in the open state, the drive unit 331 passes through the clearance opening 51. The clearance opening 51 mentioned in this application can be on the locking element 5 or in the external space on one side of the locking element 5.

[0103] like Figures 3-6 As shown, in this embodiment, the oblique tongue 311 has a pressure-retracting surface 3111 and a thrust surface 3112. The pressure-retracting surface 3111 is an inclined surface or an arc-shaped surface, and the thrust surface 3112 has a groove 31121. The small tongue 341 slides in conjunction with the groove 31121.

[0104] like Figures 3-6 As shown, in this embodiment, the oblique tongue 311 has a pressure-retracting surface 3111 and a thrust surface 3112. The pressure-retracting surface 3111 is an inclined surface or an arc-shaped surface, and the thrust surface 3112 has a groove 31121. The small tongue 341 slides in conjunction with the groove 31121.

[0105] The buckle plate 1 has a limiting hole 11 for the oblique tongue body 31 to be inserted into, and the buckle plate 1 also has a protrusion 12 that extends into the limiting hole 11; the small tongue 341 is fully embedded in the sliding groove 31121. When the oblique tongue mechanism 3 is in the closed position, the oblique tongue body 31 extends into the limiting hole 11 and the small tongue 341 contacts and cooperates with the protrusion 12.

[0106] The small tongue 341 is completely embedded in the sliding groove 31121, and the part of the small tongue 341 that does not protrude from the sliding groove 31121 is referred to as a finger. In this way, the thickness of the lock body is not changed, i.e., the thickness of the lock body does not need to be increased due to the protrusion of the small tongue 341 from the sliding groove 31121.

[0107] As shown in Figure 4 and Figure 5 , in this embodiment, the guide groove 333 includes at least a guide portion 3331 that is not parallel to the axis of the rod portion 312. During the transition of the latch bolt mechanism 3 from the door-closed-out-of-position state to the door-closed-in-position state, the guide block 3421 moves at least a distance in the guide portion 3331.

[0108] As shown in Figure 4 and Figure 5 , in this embodiment, the guide groove 333 further includes a first portion 3332 and a second portion 3333, and the first portion 3332, the guide portion 3331, and the second portion 3333 are connected in sequence.

[0109] In the door-open state and the door-closed-out-of-position state, the guide block 3421 is located in the first portion 3332 or at the intersection of the first portion 3332 and the guide portion 3331.

[0110] In the door-closed-in-position state, the guide block 3421 is located in the second portion 3333 or at the intersection of the second portion 3333 and the guide portion 3331.

[0111] As shown in Figures 3-6 , in this embodiment, the guide groove 333 is provided on the rotating sleeve 33, and the guide block 3421 is provided on the mounting portion 342.

[0112] The rotating sleeve 33 also has a notch 332.

[0113] The mounting portion 342 is mounted on the outer side of the rod portion 312, the rotating sleeve 33 is sleeved on the outer side of the mounting portion 342, and the small tongue portion 341 passes through the notch 332.

[0114] The second elastic member 35 is a spring, the second elastic member 35 is sleeved on the rod portion 312, one end of the second elastic member 35 cooperates with the mounting portion 342, and the other end cooperates with the rotating sleeve 33 or the rod portion 312.

[0115] As shown in Figure 4 and Figure 6 , in this embodiment, the outer side wall of the rod portion 312 has a limiting portion 3121, the rotating sleeve 33 is sleeved on the rod portion 312 and located between the latch bolt portion 311 and the limiting portion 3121. In actual use, the limiting portion 3121 can be an integral structure with the rod portion 312, or a snap spring mounted on the rod portion 312.

[0116] In actual application, the first elastic member 32 is a spring, a tension spring or a torsion spring, one end of the first elastic member 32 is matched with the lock shell 2, and the other end is directly or indirectly matched with the rod portion 312.

[0117] As shown in the drawings, the main lock bolt mechanism 4 of the lock body comprises: Figures 15-20

[0118] a main lock bolt body 41 which is slidingly arranged on the lock shell 2, the main lock bolt body 41 has a main lock bolt portion 411 and a main lock bolt plate 412 which are connected with each other, the main lock bolt plate 412 has a driving groove 4121, and the main lock bolt body 41 has an extended state and a retracted state;

[0119] a main lock bolt pushing block 42 which is rotatably arranged on the lock shell 2, the main lock bolt pushing block 42 can rotate around a first rotation axis 43, the main lock bolt pushing block 42 has a driving block 421 which extends into the driving groove 4121, and when the main lock bolt pushing block 42 rotates, the main lock bolt body 41 can be driven to slide through the cooperation of the driving block 421 and the driving groove 4121, the main lock bolt pushing block 42 has a first position and a second position, when the main lock bolt pushing block 42 is at the first position, the main lock bolt body 41 is in the extended state, and when the main lock bolt pushing block 42 is at the second position, the main lock bolt body 41 is in the retracted state;

[0120] a pulling rack 44 which is slidingly arranged on the lock shell 2, the pulling rack 44 is used to directly or indirectly mesh with the main lock bolt pushing block 42, the pulling rack 44 can drive the main lock bolt pushing block 42 to rotate when the pulling rack 44 slides, the pulling rack 44 has a locking position and a release position, when the pulling rack 44 is at the locking position, the main lock bolt pushing block 42 is at the second position, and when the pulling rack 44 is at the release position, the main lock bolt pushing block 42 is at the first position, the pulling rack 44 has a locking portion 441 which is used to cooperate with the locking element 5, the pulling rack 44 cannot slide when the locking element 5 locks the locking portion 441, and the pulling rack 44 is at the locking position, the pulling rack 44 can slide to the release position after being forced when the locking element 5 does not lock the locking portion 441;

[0121] a main lock bolt ejection elastic member 45 which is arranged in the lock shell 2 and cooperates with the pulling rack 44, and is used to drive the pulling rack 44 to slide to the release position when the locking element 5 does not lock the locking portion 441.

[0122] In actual application, after the door is closed and the locking element 5 is unlocked, the main lock bolt ejection elastic member 45 drives the pulling rack 44 to move, so that the main lock bolt body 41 is automatically ejected and switched to the extended state.

[0123] As shown in the drawings, the main lock bolt mechanism 4 of the lock body comprises: Figure 17 and Figure 18 ​As shown, in the embodiment, the main bolt mechanism 4 further comprises a transmission member 46 rotatably installed on the lock shell 2, the transmission member is fixed opposite to the main bolt pushing block 42, and the transmission member and the main bolt pushing block 42 can rotate synchronously, the transmission member 46 has a tooth portion 461, and the pulling rack 44 is engaged with the tooth portion 461. In actual application, the transmission member 46 can also not be arranged, at this time, the main bolt pushing block 42 has the tooth portion 461, and the pulling rack 44 is engaged with the tooth portion 461.

[0124] As shown in the drawings, Figures 15-20 the main bolt mechanism 4 further comprises:

[0125] a rotating pushing piece 47 rotatably installed on the lock shell 2, fixed opposite to the main bolt pushing block 42, and capable of rotating synchronously with the main bolt pushing block 42, the rotating pushing piece 47 has a first matching portion 471 arranged adjacent to the first rotating axis 43;

[0126] a lock cylinder 48, as shown in the drawings, Figure 20 installed on the lock shell 2, the lock cylinder 48 has a lock head cam 481, the lock head cam 481 has an initial position and an unlocking position;

[0127] a lock head pushing piece 49 movably arranged on the lock shell 2, the lock head pushing piece 49 has a pressure receiving portion 491 and a second matching portion 492, the pressure receiving portion 491 is located on one side of the lock cylinder 48 and adjacent to the lock head cam 481; and

[0128] in the process of the lock head cam 481 rotating from the initial position to the unlocking position, the lock head cam 481 is in contact with the pressure receiving portion 491, driving the lock head pushing piece 49 to move, after the lock head pushing piece 49 moves, the second matching portion 492 is in contact with the first matching portion 471, driving the rotating pushing piece 47 and the main bolt pushing block 42 to rotate synchronously, so that the main bolt body 41 is switched from the extended state to the retracted state, and at the same time, the main bolt pushing block 42 drives the pulling rack 44 to slide to the locked position and is locked with the locking element 5.

[0129] The main bolt mechanism 4 of the present application, the pressure receiving portion 491 is located on one side of the lock cylinder 48 and adjacent to the lock head cam 481, the lock head cam 481 can drive the lock head pushing piece 49 to move by rotating a small angle, the first matching portion 471 of the main bolt pushing block 42 is arranged adjacent to the first rotating axis 43, so that the first matching portion 471 only needs to move a small range to realize the main bolt pushing block 42 rotating a large angle, the combination of the two (“the pressure receiving portion 491 is located on one side of the lock cylinder 48 and adjacent to the lock head cam 481” and “the first matching portion 471 is arranged adjacent to the first rotating axis 43”) can make the main bolt mechanism 4 rotate a small angle when unlocking with the key, and the unlocking process takes a short time.

[0130] In the embodiment, when the lock head cam 481 rotates from the initial position to the unlocking position, the angle of the lock head cam 481 rotating is less than or equal to 90°.

[0131] As shown in Figure 17 and 18 In this embodiment, the main lock tongue plate 412 is located between the main lock tongue pushing block 42 and the rotating pushing piece 47.

[0132] The driving block 421 is inserted into the driving groove 4121.

[0133] One end of the driving block 421 is fixed to the main lock tongue pushing block 42, and the other end is inserted into the rotating pushing piece 47; or one end of the driving block 421 is fixed to the rotating pushing piece 47, and the other end is inserted into the main lock tongue pushing block 42.

[0134] In this way, the main lock tongue plate 412 is uniformly stressed, and is more stable and reliable when moving.

[0135] In this embodiment, the rotating pushing piece 47 also has a third matching part 472, which is located on the same side of the first rotation axis 43 as the first matching part 471, and the distance between the third matching part 472 and the first rotation axis 43 is greater than the distance between the first matching part 471 and the first rotation axis 43.

[0136] The lock head pushing piece 49 has a fourth matching part 493 that matches the third matching part 472.

[0137] During the process of rotating the lock head cam 481 from the initial position to the unlocking position, the lock head cam 481 is in contact with the pressure receiving part 491, driving the lock head pushing piece 49 to move. At the beginning, the fourth matching part 493 of the lock head pushing piece 49 is in contact with the third matching part 472, driving the rotating pushing piece 47 to rotate. Then, the fourth matching part 493 is no longer in contact with the third matching part 472, but the second matching part 492 is in contact with the first matching part 471, continuing to drive the rotating pushing piece 47 to rotate, so that the main lock tongue body 41 switches from the extended state to the retracted state, and at the same time, the main lock tongue pushing block 42 drives the pulling rack 44 to slide to the locking position and is locked with the locking element 5.

[0138] The first matching part 471 is arranged adjacent to the first rotation axis 43, which results in a small force arm and requires a large force to rotate the key at the beginning. The third matching part 472 (the distance between the third matching part 472 and the first rotation axis 43 is greater than the distance between the first matching part 471 and the first rotation axis 43) and the fourth matching part 493 are arranged to drive the rotating piece 47 to rotate at the beginning of unlocking. Compared with the first matching part 471, the third matching part 472 and the fourth matching part 493 increase the force arm and can better drive the rotating piece 47 to rotate. Then, the fourth matching part 493 is no longer in contact with the third matching part 472, but the second matching part 492 is in contact with the first matching part 471 to continue driving the rotating piece 47 to rotate, and finally the main lock tongue body 41 is switched from the extended state to the retracted state.

[0139] As shown in Figure 16 , in the embodiment, the first matching part 471 and the third matching part 472 are respectively arranged on both sides of the lock head piece 49.

[0140] In the embodiment, the lock head piece 49 is slidingly arranged on the lock shell 2, and the main lock tongue spring 45 is a spring, a torsion spring or a tension spring.

[0141] The latch bolt mechanism 3 of the embodiment has an extended state and a retracted state. As shown in Figure 15 , Figure 16 and Figure 19 , the lock body further comprises:

[0142] The handle shaft 71 is rotatably installed on the lock shell 2 and is used for installing a handle.

[0143] The handle piece 72 is installed on the handle shaft 71 and can rotate relative to the handle shaft 71. The handle piece 72 has a fifth matching part 721 and a sixth matching part 722. The fifth matching part 721 cooperates with the rod part 312 of the latch bolt mechanism 3 to switch the latch bolt mechanism 3 from the extended state to the retracted state.

[0144] The lock head piece 49 further has an unlocking part 494. During the process of rotating the lock head cam 481 from the initial position to the unlocking position, the lock head cam 481 is in contact with the pressure part 491 to drive the lock head piece 49 to move. After the lock head piece 49 moves, the main lock tongue body 41 is switched from the extended state to the retracted state. At the same time, the main lock tongue piece 42 drives the pull rack 44 to slide to the locking position and is locked with the locking element 5. At the same time, the unlocking part 494 abuts against the sixth matching part 722 to drive the handle piece 72 to rotate. Finally, the fifth matching part 721 of the handle piece 72 drives the latch bolt mechanism 3 to switch from the extended state to the retracted state.

[0145] Embodiment 2

[0146] As shown inFigures 21-23 The difference between the present embodiment and embodiment 1 is shown in the following:

[0147] The end of the small tongue part 341 away from the mounting part 342 has a protruding block 3411 protruding the sliding groove 31121, the lock shell 2 has a avoiding groove 21 for the protruding block 3411 to embed, when the latch mechanism 3 is in the door closed position, the protruding block 3411 abuts against the buckle plate 1, and at least part of the protruding block 3411 is embedded in the avoiding groove 21.

[0148] The small tongue part 341 has a part protruding the sliding groove 31121, which is arranged without changing the buckle plate 1 (the buckle plate 1 has various styles, and changing the buckle plate 1 can effectively reduce the installation efficiency and cost of the lock body), when the latch mechanism 3 is in the door open state, the latch body 31 extends into the limiting hole 11 of the buckle plate 1, and the small tongue part 341 has a part protruding the sliding groove 31121, which can continue to contact the buckle plate 1, so that the latch accessory 34 is in the retracted state.

[0149] The small tongue part 341 is arranged in this way, which does not increase the thickness of the lock body and does not need to be specially designed for the buckle plate 1 compared with other structural forms.

[0150] As shown in Figure 21 and Figure 23 In the present embodiment, the protruding block 3411 has an inclined or arc-shaped first guide surface 34111 on the side close to the mounting part 342, and the protruding block 3411 is smaller in thickness as it is farther away from the sliding groove 31121; the avoiding groove 21 has a second guide surface 211 matched with the guide surface.

[0151] The cooperation of the first guide surface 34111 and the second guide surface 211 does not affect the protruding block 3411 embedded in the avoiding groove 21 when the latch mechanism 3 is in the door closed position, but can reduce the amount of material removed on the lock shell 2 due to the setting of the avoiding groove 21, and can ensure the structural strength of the lock body. That is, if the first guide surface 34111 and the second guide surface 211 are not set, the protruding block 3411 is a block with a certain thickness, at this time, a larger volume of avoiding groove 21 is needed, which will remove more material and affect the structural strength.

[0152] The above only describes the preferred embodiments of the present application, and does not limit the patent protection scope of the present application, any equivalent structural transformation, direct or indirect application in other related technical fields, are also included in the protection scope of the present application.

Claims

1. A lock body for cooperating with a strike plate mounted on a door frame, characterised in that, The lock body comprises: a lock housing; a main bolt mechanism mounted on the lock housing; a locking element movably mounted on the lock housing for locking or unlocking the main bolt mechanism, the locking element having an avoiding opening on one side thereof, the locking element having a locking state and an unlocking state; a reset elastic member mounted on the lock housing for resetting the locking element; and a latch mechanism mounted on the lock housing; The latch mechanism comprises: a latch main body slidingly arranged in the lock housing, the latch main body having a latch portion and a rod portion connected to each other; a first elastic member arranged in the lock housing for directly or indirectly cooperating with the latch main body to make the latch main body have a movement tendency of moving outwardly of the lock housing; a rotating sleeve rotatably mounted on the latch portion or / and the rod portion, the rotating sleeve being capable of rotating around an axis of the rod portion and being capable of synchronously axially sliding with the latch main body when the latch main body slides, the rotating sleeve having a notch and a driving portion for cooperating with the locking element; a latch accessory, the latch accessory having a small tongue portion and a mounting portion connected to each other, the mounting portion being slidingly arranged on the rod portion of the latch main body, the latch main body being capable of moving inwardly of the lock housing to bring the latch accessory to move inwardly of the lock housing, the mounting portion being mounted on an outer side of the rod portion, the rotating sleeve being sleeved on an outer side of the mounting portion, the small tongue portion penetrating through the notch, a guide structure being arranged between the mounting portion and the rotating sleeve, the guide structure comprising a guide groove and a guide block extending into the guide groove, one of the guide groove and the guide block being arranged on the latch accessory and the other being arranged on the rotating sleeve, the guide structure being capable of making the rotating sleeve rotate relative to the latch accessory when the rotating sleeve moves axially relative to the latch accessory, so as to change the position of the driving portion; and a second elastic member directly or indirectly cooperating with the latch accessory for making the latch accessory have a movement tendency of moving outwardly of the lock housing; the latch mechanism having an open door state, a closed door non-in-place state and a closed door in-place state; when the latch mechanism is in the open door state, the latch portion of the latch main body extends out of the lock housing, the small tongue portion of the latch accessory extends out of the lock housing, the locking element is in the locking state, and the driving portion penetrates through the avoiding opening; when the latch mechanism is in the closed door non-in-place state, the latch portion of the latch main body is pressed to move inwardly of the lock housing to retract, and the latch accessory also moves inwardly of the lock housing under the driving of the latch main body; when the latch mechanism is in the closed door in-place state, the small tongue portion of the latch accessory abuts against a strike plate, the latch main body slides to extend out of the lock housing under the action of the first elastic member, the latch main body synchronously drives the rotating sleeve to move when the latch main body slides, the rotating sleeve rotates under the action of the guide groove and the guide block which cooperate with each other when the rotating sleeve moves relative to the mounting portion, so as to change the position of the driving portion, the driving portion after changing the position is capable of contacting the locking element during the movement along the axial direction of the latch main body, so as to switch the locking element from the locking state to the unlocking state; the guide groove at least comprising a guide portion which is not parallel to the axis of the rod portion, the guide block moving at least a distance in the guide portion during the latch mechanism changing from the closed door non-in-place state to the closed door in-place state.

2. The lock body of claim 1, wherein The installation part is slidingly installed on the rod part, and the installation part is abutted against the latch part when the latch mechanism is in the door opening state; The guide groove is arranged on the rotating sleeve, and the guide block is arranged on the installation part; The outer side wall of the rod part is provided with a limiting part, the rotating sleeve is sleeved on the rod part, and is located between the latch part and the limiting part; The first elastic member is a spring, a tension spring or a torsion spring, one end of the first elastic member is matched with the lock shell, and the other end is directly or indirectly matched with the rod part; The second elastic member is a spring, the second elastic member is sleeved on the rod part, one end of the second elastic member is matched with the installation part, and the other end is matched with the rotating sleeve or the rod part.

3. The lock body of claim 1, wherein The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; 4. The lock body of claim 3, wherein, The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; 5. The lock body of claim 4, wherein, The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; 6. The lock body of claim 3, wherein The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; 7. The lock body of claim 1, wherein The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; The latch part is provided with a compression retraction surface and a thrust surface, the compression retraction surface is an inclined surface or an arc surface, and the thrust surface is provided with a sliding groove; the latch part is slidingly matched with the sliding groove; The guide groove further comprises a first part and a second part, and the first part, the guide part and the second part are sequentially connected; 8. The lock body of claim 1, wherein, The guide block is located at the first part or the intersection of the first part and the guide part when the latch mechanism is in the door opening state and the door closing non-position state; The guide block is located at the second part or the intersection of the second part and the guide part when the latch mechanism is in the door closing position state. The main latch mechanism comprises: A main latch body is slidingly arranged on the lock shell, and the main latch body is provided with a main latch part and a main latch plate which are connected with each other, the main latch plate is provided with a driving groove, and the main latch body has an extension state and a retraction state; A main latch driving block is rotationally installed on the lock shell, and the main latch driving block can rotate around a first rotation axis, the main latch driving block is provided with a driving block which extends into the driving groove, and the main latch body can be driven to slide through cooperation of the driving block and the driving groove when the main latch driving block rotates, the main latch driving block has a first position and a second position, the main latch body is in the extension state when the main latch driving block is in the first position, and the main latch body is in the retraction state when the main latch driving block is in the second position; A pulling rack is arranged to slide on the lock case, and is used to directly or indirectly engage with the main lock tongue push block. When the pulling rack slides, it can drive the main lock tongue push block to rotate. The pulling rack has a locking position and a release position. When the pulling rack is in the locking position, the main lock tongue push block is in the second position. When the pulling rack is in the release position, the main lock tongue push block is in the first position. The pulling rack has a locking part, which is used to cooperate with the locking element. When the locking element locks the locking part, the pulling rack cannot slide. When the locking element does not lock the locking part, the pulling rack can slide to the release position under force. A main lock tongue spring is arranged in the lock case, and cooperates with the pulling rack. When the locking element does not lock the locking part, the main lock tongue spring drives the pulling rack to slide to the release position. A rotating push piece is arranged to rotate on the lock case, and is fixed opposite to the main lock tongue push block, and can rotate synchronously with the main lock tongue push block. The rotating push piece has a first cooperation part arranged adjacent to the first rotation axis. A lock cylinder is arranged on the lock case. The lock cylinder has a lock head cam, which has an initial position and an unlocking position. A lock head push piece is arranged to move on the lock case. The lock head push piece has a pressure receiving part and a second cooperation part. The pressure receiving part is arranged on one side of the lock cylinder and is adjacent to the lock head cam. During the process that the lock head cam rotates from the initial position to the unlocking position, the lock head cam contacts and cooperates with the pressure receiving part, drives the lock head push piece to move, and after the lock head push piece moves, the second cooperation part contacts and cooperates with the first cooperation part, drives the rotating push piece and the main lock tongue push block to rotate synchronously, drives the main lock tongue body to switch from the extended state to the retracted state, and simultaneously drives the main lock tongue push block to slide the pulling rack to the locking position and lock the locking element.

9. The lock body of claim 8, wherein, The rotating push piece further has a third cooperation part. The third cooperation part and the first cooperation part are both arranged on the same side of the first rotation axis, and the distance between the third cooperation part and the first rotation axis is greater than the distance between the first cooperation part and the first rotation axis. The lock head push piece has a fourth cooperation part which cooperates with the third cooperation part. During the process that the lock head cam rotates from the initial position to the unlocking position, the lock head cam contacts and cooperates with the pressure receiving part, drives the lock head push piece to move, and at the beginning, the fourth cooperation part of the lock head push piece contacts and cooperates with the third cooperation part, drives the rotating push piece to rotate, then the fourth cooperation part no longer contacts and cooperates with the third cooperation part, but the second cooperation part contacts and cooperates with the first cooperation part, continues to drive the rotating push piece to rotate, drives the main lock tongue body to switch from the extended state to the retracted state, and simultaneously drives the main lock tongue push block to slide the pulling rack to the locking position and lock the locking element.

10. The lock body of claim 8, wherein, The main lock tongue push block has a tooth part, and the pulling rack engages with the tooth part, or the main lock tongue mechanism further comprises a transmission member arranged to rotate on the lock case. The transmission member is fixed opposite to the main lock tongue push block, and the transmission member and the main lock tongue push block can rotate synchronously. The transmission member has a tooth part, and the pulling rack engages with the tooth part. The latch mechanism has an extended state and a retracted state; the lock body further comprises: a handle shaft rotatably installed on the lock housing and used for installing the handle; and a handle pusher installed on the handle shaft and capable of rotating relative to the handle shaft, the handle pusher having a fifth matching part and a sixth matching part, the fifth matching part being matched with the rod part of the latch mechanism and used for switching the latch mechanism from the extended state to the retracted state. The lock head pusher further has an unlocking part, during the process of the lock head cam being rotated from the initial position to the unlocking position, the lock head cam is in contact with the pressure-receiving part, drives the lock head pusher to move, after the lock head pusher moves, the main latch body is switched from the extended state to the retracted state, at the same time, the main latch pusher drives the pulling rack to slide to the locking position and is locked with the locking element, at the same time, the unlocking part is in abutment with the sixth matching part to drive the handle pusher to rotate, finally, the fifth matching part of the handle pusher switches the latch mechanism from the extended state to the retracted state.

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