Lock body

Abstract

The invention discloses a lock body which comprises a lock shell, a main spring bolt mechanism, a locking element, a reset elastic piece and a latch bolt mechanism, and the latch bolt mechanism comprises a latch bolt main body, a spring bolt, a spring bolt, a spring bolt and a spring bolt, the first elastic piece is matched with the latch bolt main body; the rotating sleeve can rotate around the axis of the rod part, when the latch bolt body slides, the rotating sleeve can be driven to synchronously and axially slide, the rotating sleeve is provided with a driving part, and the driving part is used for being matched with a locking element; the small tongue part and the mounting part are connected with each other, the mounting part is arranged on the latch bolt main body in a sliding manner, a guide groove and a guide block extending into the guide groove are arranged between the mounting part and the rotating sleeve, and when the guide groove and the guide block axially move on the rotating sleeve relative to the latch bolt accessory, the rotating sleeve can rotate relative to the latch bolt accessory, so that the position of the driving part is changed; and the second elastic piece is directly or indirectly matched with the latch bolt accessory and is used for enabling the latch bolt accessory to have a movement trend of moving towards the outer side of the lock shell. The lock body is more compact in structure.

Description

Technical Field

[0001] The invention relates to the field of locks, and in particular to a lock body. Background Art

[0002] The main lock tongue of the most traditional mortise lock cannot pop out automatically each time the door is closed. The main lock tongue needs to be extended by lifting the handle.

[0003] In order to realize the automatic pop-up of the main lock tongue, the existing mechanical lock will be provided with a structure that can make the main lock tongue mechanism automatically pop out under the action of the elastic member, and the main lock tongue mechanism will be locked by the locking element when the door is open. After the door is closed, the inclined tongue mechanism will unlock the locking element, so that the main lock tongue mechanism automatically pops out under the action of the elastic member to achieve the door locking action. For example, the patent document with publication number CN 105113856A discloses a inclined tongue mechanism that can realize the automatic unlocking of the main lock tongue mechanism when the door is closed.

[0004] However, the structure of the inclined tongue mechanism in the above patent document is relatively complicated, and the inclined tongue assembly and the trigger tongue assembly are arranged side by side with an interval up and down, resulting in a large occupied space and the lock body structure is not compact enough. Summary of the invention

[0005] In view of the above problems, the present invention provides a lock body.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A lock body, used to cooperate with a pinch plate installed on a door frame, the lock body comprising:

[0008] Lock case;

[0009] A main deadbolt mechanism, mounted on the lock housing;

[0010] A locking element, movably mounted on the lock housing, used to lock or unlock the main bolt mechanism, one side of the locking element has an escape opening, and the locking element has a locked state and an unlocked state;

[0011] A reset elastic member, mounted on the lock housing, for resetting the locking element; and

[0012] A latch bolt mechanism, mounted on the lock housing;

[0013] The inclined bolt mechanism comprises:

[0014] The oblique tongue body is slidably arranged on the lock housing, and the oblique tongue body comprises an oblique tongue portion and a rod portion connected to each other;

[0015] A first elastic member is disposed on the lock housing and is used to directly or indirectly cooperate with the oblique tongue body so that the oblique tongue body has a movement tendency to move toward the outside of the lock housing;

[0016] A rotating sleeve is rotatably mounted on the oblique tongue portion and / or the rod portion, and the rotating sleeve can rotate around the axis of the rod portion. When the oblique tongue body slides, it can drive the rotating sleeve to synchronously slide axially. The rotating sleeve has a notch and a driving portion, and the driving portion is used to cooperate with the locking element;

[0017] An oblique bolt attachment, the oblique bolt attachment has a small tongue portion and a mounting portion that are connected to each other, the mounting portion being slidably arranged on the rod portion of the oblique bolt body, and being able to drive the oblique bolt attachment to move into the lock housing when the oblique bolt body slides into the lock housing, the mounting portion being arranged on the outer side of the rod portion, the rotating sleeve being sleeved on the outer side of the mounting portion, the small tongue portion passing through the notch, a guiding structure being arranged between the mounting portion and the rotating sleeve, the guiding structure comprising a guiding groove and a guiding block extending into the guiding groove, one of the guiding groove and the guiding block being arranged on the oblique bolt attachment, and the other being arranged on the rotating sleeve, the guiding structure being used to enable the rotating sleeve to rotate relative to the oblique bolt attachment when the rotating sleeve moves axially relative to the oblique bolt attachment, thereby changing the position of the driving portion; and

[0018] A second elastic member, directly or indirectly cooperating with the oblique bolt attachment, is used to make the oblique bolt attachment have a movement tendency to move toward the outside of the lock housing;

[0019] The latch mechanism has a door-opening state, a door-not-fully-closed state, and a door-fully-closed state;

[0020] When the latch bolt mechanism is in the door opening state, the latch bolt portion of the latch bolt body extends out of the lock housing, the small latch bolt portion of the latch bolt attachment extends out of the lock housing, the locking element is in the locking state, and the driving portion passes through the avoidance opening;

[0021] When the latch mechanism is in a state where the door is not fully closed, the latch portion of the latch body is pressed to move and retract into the lock housing, and the latch attachment is also driven by the latch body to move and retract into the lock housing;

[0022] When the latch mechanism is in the state of closing the door, the small tongue of the latch attachment abuts against the buckle plate, and the latch body slides out of the lock shell under the action of the first elastic member. The latch body will synchronously drive the rotating sleeve to move when sliding. When the rotating sleeve moves relative to the mounting portion, under the action of the mutually matched guide groove and guide block, the rotating sleeve rotates to change the position of the driving part. The driving part after changing its position will contact the locking element during the period of moving along the axial direction of the latch body, so that the locking element is switched from the locked state to the unlocked state.

[0023] The guide groove at least includes a guide portion which is not parallel to the axis of the rod portion. When the latch mechanism changes from a door-unclosed state to a door-closed state, the guide block moves at least a certain distance in the guide portion.

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

[0025] In one embodiment of the present invention, the mounting portion is slidably mounted on the rod portion, and when the latch bolt mechanism is in the door opening state, the mounting portion abuts against the latch bolt portion;

[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, and the rotating sleeve is disposed on the rod portion and is located between the oblique 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 housing, and the other end is directly or indirectly matched with the rod;

[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 embodiment of the present invention, the oblique tongue portion has a pressure-bearing retracting surface and a thrust surface, the pressure-bearing retracting surface is an inclined surface or an arc-shaped surface, the thrust surface has a sliding groove, and the small tongue portion slides in cooperation with the sliding groove;

[0031] The small tongue has a portion protruding from the slide slot. When the oblique tongue mechanism is in a door-closed state, the end surface of the portion of the small tongue protruding from the slide slot contacts and cooperates with the buckle plate.

[0032] In one embodiment of the present invention, the end of the small tongue portion away from the mounting portion has a protruding block protruding from the slide groove, and the lock shell has an avoidance groove for the protruding block to be embedded in. When the inclined tongue mechanism is in a closed state, the protruding block abuts against the buckle plate, and the protruding block is at least partially embedded in the avoidance groove.

[0033] In one embodiment of the present invention, the protruding block has an inclined or arc-shaped first guide surface on one side close to the mounting portion, and the thickness of the protruding block decreases as the protruding block moves away from the slide groove; the avoidance groove has a second guide surface adapted to the guide surface.

[0034] In one embodiment of the present invention, the buckle plate has a limiting hole for the inclined tongue body to be inserted into, and the buckle plate also has a protrusion extending into the limiting hole; the small tongue portion is completely embedded in the sliding groove, and when the inclined tongue mechanism is in the closed state, the inclined tongue body extends into the limiting hole and the small tongue portion contacts and cooperates with the protrusion.

[0035] In one embodiment of the present invention, the guide groove further includes a first portion and a second portion, and the first portion, the guide portion and the second portion are connected in sequence;

[0036] When the latch mechanism is in the door opening state or the door not fully closed state, the guide block is located at the first part or at the junction of the first part and the guide part;

[0037] When the latch mechanism is in the door closing position, the guide block is located at the second part or at the junction of the second part and the guide part.

[0038] In one embodiment of the present invention, the main locking tongue mechanism comprises:

[0039] A main lock tongue body is slidably arranged on the lock housing, the main lock tongue body comprises a main lock tongue portion and a main lock tongue plate connected to each other, the main lock tongue plate comprises a driving groove, and the main lock tongue body has an extended state and a retracted state;

[0040] A main lock tongue toggle block is rotatably mounted on the lock housing, the main lock tongue toggle block can rotate around a first rotation axis, the main lock tongue toggle block has a driving block extending into the driving groove, and when the main lock tongue toggle block rotates, the main lock tongue body can be driven to slide through the cooperation of the driving block and the driving groove, the main lock tongue toggle block has a first position and a second position, when the main lock tongue toggle block is in the first position, the main lock tongue body is in an extended state, and when the main lock tongue toggle block is in the second position, the main lock tongue body is in a retracted state;

[0041] A pulling rack is slidably arranged on the lock housing, the pulling rack is used to directly or indirectly mesh with the main lock tongue toggle block, and can drive the main lock tongue toggle block to rotate when the pulling rack slides, the pulling rack has a locking position and a releasing position, when the pulling rack is in the locking position, the main lock tongue toggle block is in the second position, when the pulling rack is in the releasing position, the main lock tongue toggle block is in the first position, the pulling rack has a locking portion, the locking portion is used to cooperate with the locking element, when the locking element locks the locking portion, the pulling rack cannot slide, the pulling rack is in the locking position, and when the locking element does not lock the locking portion, the pulling rack can slide and switch to the releasing position after being subjected to force;

[0042] The main lock tongue pops up the elastic member, which is installed in the lock housing and cooperates with the pulling rack to drive the pulling rack to slide to the release position when the locking element does not lock the locking part;

[0043] A rotating paddle, rotatably mounted on the lock housing, relatively fixed to the main lock tongue toggle block, and capable of synchronously rotating with the main lock tongue toggle block, wherein the rotating paddle has a first matching portion disposed adjacent to the first rotation axis;

[0044] A lock core is mounted on the lock housing, wherein the lock core has a lock cam, and the lock cam has an initial position and an unlocking position;

[0045] A lock paddle, movably disposed on the lock housing, the lock paddle having a pressure-receiving portion and a second matching portion, the pressure-receiving portion being located at one side of the lock core and adjacent to the lock cam; and

[0046] During the process of the lock cam rotating from the initial position to the unlocking position, the lock cam contacts and cooperates with the pressure-bearing part, driving the lock paddle to move. After the lock paddle moves, the second matching part contacts and cooperates with the first matching part, driving the rotating paddle and the main lock tongue toggle block to rotate synchronously, so that the main lock tongue body switches from the extended state to the retracted state. At the same time, the main lock tongue toggle block drives the pulling rack to slide to the locked position and locks with the locking element.

[0047] In one embodiment of the present invention, the rotating paddle further comprises a third matching portion, the third matching portion and the first matching portion are both located on the same side of the first rotating axis, and the distance between the third matching portion and the first rotating axis is greater than the distance between the first matching portion and the first rotating axis;

[0048] The lock paddle has a fourth matching portion that matches with the third matching portion;

[0049] During the process of the lock cam rotating from the initial position to the unlocked position, the lock cam contacts and cooperates with the pressure-bearing part, driving the lock paddle to move. At the beginning, the fourth matching part of the lock paddle contacts and cooperates with the third matching part, driving the rotating paddle to rotate, and then the fourth matching part and the third matching part are no longer in contact and cooperate, but the second matching part contacts and cooperates with the first matching part, continuing to drive the rotating paddle to rotate, so that the main lock tongue body switches from the extended state to the retracted state, and at the same time, the main lock tongue toggle block drives the pulling rack to slide to the locked position and locks with the locking element.

[0050] In one embodiment of the present invention, the main lock tongue toggle block has a tooth portion, and the pulling rack is engaged with the tooth portion, or the main lock tongue mechanism further includes a transmission member rotatably mounted on the lock housing, the rotating member is relatively fixed to the main lock tongue toggle block, the rotating member and the main lock tongue toggle block can rotate synchronously, the transmission member has a tooth portion, and the pulling rack is engaged with the tooth portion;

[0051] The latch bolt mechanism has an extended state and a retracted state; the lock body also includes:

[0052] A handle shaft, rotatably mounted on the lock housing, for mounting the handle; and

[0053] A handle paddle is mounted on the handle shaft and can rotate relative to the handle shaft. The handle paddle has a fifth matching portion and a sixth matching portion. The fifth matching portion matches with the rod portion of the latch mechanism to switch the latch mechanism from an extended state to a retracted state.

[0054] The lock paddle also has an unlocking portion. During the process of the lock cam rotating from the initial position to the unlocking position, the lock cam contacts and cooperates with the second pressure-bearing portion to drive the lock paddle to move. After the lock paddle moves, the main lock tongue body is switched from the extended state to the retracted state. At the same time, the main lock tongue toggle block drives the pulling rack to slide to the locked position and locks with the locking element. At the same time, the unlocking portion abuts against the sixth matching portion to rotate the handle paddle, and finally the inclined bolt mechanism is switched from the extended state to the retracted state through the fifth matching portion of the handle paddle.

[0055] The beneficial effects of the present invention are as follows: the inclined tongue accessory of the present application is slidably arranged on the inclined tongue body, which can make the structure more compact compared to the structure in which the trigger tongue assembly and the inclined tongue assembly are arranged side by side in the prior art. The present application can realize the rotation of the rotating sleeve through the guide block, so that after the door is closed, the driving part can contact the locking element, so that the locking element is switched from a locked state to an unlocked state. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 is a schematic diagram of the strike plate, lock housing and latch mechanism;

[0057] Figure 2 It is the front view of the oblique bolt mechanism;

[0058] Figure 3 yes Figure 2 Middle AA section view;

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

[0060] Figure 5 is a schematic diagram of a locking element, a resetting elastic member and a latch bolt mechanism;

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

[0062] Figure 7 It is a schematic diagram of the catch plate and the lock housing when the latch bolt mechanism is in the fully closed state;

[0063] Figure 8 It is a schematic diagram of the strike plate and the lock body when the latch mechanism is in a state where the door is not fully closed;

[0064] Fig. 9 It is a schematic diagram of another angle of the strike plate and the lock body when the latch mechanism is in a state where the door is not fully closed;

[0065] Fig.10 This is a schematic diagram of the rotating sleeve moving outward and just coming into contact with the locking element;

[0066] Fig.11 It is a schematic diagram of another angle when the rotating sleeve moves outward and just contacts the locking element;

[0067] Fig.12 is a schematic diagram of another angle when the rotating sleeve moves outward and just contacts the locking element;

[0068] Fig.13 It is a schematic diagram of the latch plate, the lock housing and the latch mechanism when the latch mechanism is in the fully closed state;

[0069] Fig.14 It is a schematic diagram of the latch plate, the lock housing and the latch mechanism from another angle when the latch mechanism is in a fully closed state;

[0070] Fig.15 is a schematic diagram of the lock body when the locking element has just switched to the unlocked state;

[0071] Fig.16 The pull rack is Fig.15 A schematic diagram of the locking position after the locking position is moved to the release position;

[0072] Fig.17 is a schematic diagram of the main deadbolt mechanism;

[0073] Fig.18 It is an exploded view of the main deadbolt mechanism;

[0074] Fig.19 It is a schematic diagram of using a key to move the lock paddle of the lock cylinder to the unlocking position;

[0075] Fig. 20 It is a schematic diagram of the lock cylinder;

[0076] Fig.21 is a schematic diagram of the lock body of Example 2;

[0077] Fig. 22 Schematic diagram of the lock body and the buckle plate of Example 2

[0078] Fig.23 It is an exploded view of the oblique tongue body, the oblique tongue attachment, the rotating sleeve, and the second elastic member of Example 2.

[0079] The reference numerals in the figures are:

[0080] 1. Buckle plate; 11. Limiting hole; 12. Protrusion; 2. Lock shell; 21. Avoidance groove; 211. Second guide surface; 3. Oblique tongue mechanism; 31. Oblique tongue body; 311. Oblique tongue part; 3111. Pressure retraction surface; 3112. Thrust surface; 31121. Slide groove; 312. Rod; 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. Oblique tongue attachment; 341. Small tongue; 3411. Protruding block; 34111. First guide surface; 342. Mounting part; 3421. Guide block; 35. Second elastic member; 4. Main lock tongue mechanism; 4 1. Main lock tongue body; 411. Main lock tongue portion; 412. Main lock tongue plate; 4121. Driving groove; 42. Main lock tongue toggle block; 421. Driving block; 43. First rotation axis; 44. Pull rack; 441. Locking portion; 45. Main lock tongue pop-up elastic member; 46. Transmission member; 461. Tooth portion; 47. Rotating paddle; 471. First matching portion; 472. Third matching portion; 48. Lock core; 481. Lock head cam; 49. Lock head paddle; 491. Pressure receiving portion; 492. Second matching portion; 493. Fourth matching portion; 494. Unlocking portion; 5. Locking element; 51. Avoidance; 6. Reset elastic member; 71. Handle shaft; 72. Handle paddle; 721. Fifth matching portion; 722. Sixth matching portion. DETAILED DESCRIPTION

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

[0082] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the 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 clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0084] The present invention is described in detail below in conjunction with the accompanying drawings.

[0085] Example 1

[0086] like Figures 1 to 20 As shown, this embodiment discloses a lock body used to cooperate with a pinch plate 1 installed on a door frame.

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

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

[0089] The inclined tongue body 31 is slidably disposed on the lock housing 2, and the inclined tongue body 31 comprises an inclined tongue portion 311 and a rod portion 312 connected to each other;

[0090] The first elastic member 32 is disposed on the lock housing 2 and is used to cooperate with the inclined tongue body 31 directly or indirectly, so that the inclined tongue body 31 has a movement tendency to move toward the outside of the lock housing 2;

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

[0092] The oblique tongue attachment 34 comprises a small tongue portion 341 and a mounting portion 342 which are connected to each other. The mounting portion 342 is slidably arranged on the oblique tongue body 31. When the oblique tongue body 31 slides into the lock housing 2, it can drive the oblique tongue attachment 34 to move into the lock housing 2 together. A guide structure is arranged between the mounting portion 342 and the rotating sleeve 33. The guide structure comprises 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 oblique tongue attachment 34, and the other is arranged on the rotating sleeve 33. The guide structure is used to enable the rotating sleeve 33 to rotate relative to the oblique tongue attachment 34 when the rotating sleeve 33 moves axially relative to the oblique tongue attachment 34, thereby changing the position of the driving portion 331; and

[0093] The second elastic member 35 cooperates directly or indirectly with the oblique tongue attachment 34 to make the oblique tongue attachment 34 have a movement tendency to move toward the outside of the lock housing 2;

[0094] The latch mechanism 3 has a door-opening state, a door-not-fully-closed state, and a door-fully-closed state, and the locking element 5 has a locking state and an unlocking state;

[0095] When the latch mechanism 3 is in the door opening state, Figure 1 , the oblique tongue portion 311 of the oblique tongue body 31 extends out of the lock housing 2, the small tongue portion 341 of the oblique tongue attachment 34 extends out of the lock housing 2, the locking element 5 is in a locked state, and the driving portion 331 is staggered from the locking element 5;

[0096] When the latch mechanism 3 is in the state of not closing the door, Figure 8 and Fig. 9 , the oblique tongue portion 311 of the oblique tongue body 31 is pressed and moves back into the lock housing 2, and the oblique tongue attachment 34 is also moved back into the lock housing 2 under the drive of the oblique tongue body 31;

[0097] When the latch mechanism 3 is in the state of closing the door, Figure 11 to Figure 14 The small tongue portion 341 of the oblique tongue attachment 34 abuts against the buckle plate 1, and the oblique tongue body 31 slides out of the lock housing 2 under the action of the first elastic member 32. The oblique tongue body 31 will synchronously drive the rotating sleeve 33 to move when sliding. When the rotating sleeve 33 moves relative to the mounting portion 342, under the action of the mutually matching guide groove 333 and the guide block 3421, the rotating sleeve 33 rotates to change the position of the driving portion 331. The driving portion 331 after the position change will contact the locking element 5 during the period of moving along the axial direction of the oblique tongue body 31, so that the locking element 5 switches from the locked state to the unlocked state.

[0098] The inclined tongue attachment 34 of the present application is slidably arranged on the inclined tongue body 31. Compared with the structure in which the trigger tongue assembly and the inclined tongue assembly are arranged side by side in the prior art, 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 driving part 331 can contact the locking element 5, so that the locking element 5 is switched from the locked state to the unlocked state.

[0099] In actual use, the locking element 5 can be rotatably installed in the lock housing 2, or can be slidably installed in the lock housing 2. This embodiment is a rotational fit.

[0100] like Figure 1 As mentioned above, the lock body further comprises a resetting elastic member 6 for resetting the locking element 5 .

[0101] In this embodiment, the mounting portion 342 is slidably mounted on the rod portion 312, and when the latch bolt mechanism 3 is in the door opening state, the mounting portion 342 abuts against the latch bolt portion 311. There are many ways to slide the mounting portion 342, such as sleeve mounting, track mounting, etc.

[0102] like Figure 1 and Figure 6 As shown, one side of the locking element 5 has an escape opening 51, and when the latch mechanism 3 is in the door opening state, the driving part 331 passes through the escape opening 51. The escape opening 51 mentioned in the present application can be on the locking element 5, or can be an external space on one side of the locking element 5.

[0103] like Figures 3 to 6 As shown, in this embodiment, the inclined tongue portion 311 has a compressed retracting surface 3111 and a thrust surface 3112 , the compressed retracting surface 3111 is an inclined surface or an arc surface, the thrust surface 3112 has a slide groove 31121 , and the small tongue portion 341 slides in cooperation with the slide groove 31121 .

[0104] like Figures 3 to 6 As shown, in this embodiment, the oblique tongue portion 311 has a pressure-retracting surface 3111 and a thrust surface 3112, the pressure-retracting surface 3111 is an inclined surface or an arc surface, the thrust surface 3112 has a slide groove 31121, and the small tongue portion 341 is slidably matched with the slide groove 31121;

[0105] The buckle plate 1 has a limiting hole 11 for the inclined tongue body 31 to be inserted into, and the buckle plate 1 also has a protrusion 12 extending into the limiting hole 11; the small tongue portion 341 is completely embedded in the slide groove 31121, and when the inclined tongue mechanism 3 is in the closed door state, the inclined tongue body 31 extends into the limiting hole 11 and the small tongue portion 341 contacts and cooperates with the protrusion 12.

[0106] The small tongue portion 341 is completely embedded in the slide groove 31121, which means that the small tongue portion 341 has no part protruding from the slide groove 31121. This arrangement can maintain the thickness of the lock body without changing the thickness of the lock body, that is, the thickness of the lock body does not need to be increased due to the small tongue portion 341 protruding from the slide groove 31121.

[0107] like Figure 4 and Figure 5 As shown, in this embodiment, the guide groove 333 at least includes a guide portion 3331 which is not parallel to the axis of the rod portion 312. When the latch mechanism 3 changes from the door-unclosed state to the door-closed state, the guide block 3421 moves at least a certain distance in the guide portion 3331.

[0108] like Figure 4 and Figure 5 As shown, 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] When the latch mechanism 3 is in the door opening state or the door not fully closed state, the guide block 3421 is located at the first portion 3332 or at the junction of the first portion 3332 and the guide portion 3331;

[0110] When the latch mechanism 3 is in the door closing position, the guide block 3421 is located at the second portion 3333 or at the junction of the second portion 3333 and the guide portion 3331 .

[0111] like Figures 3 to 6 As shown, 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 outside of the rod portion 312 , the rotating sleeve 33 is sleeved on the outside of the mounting portion 342 , and the 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] like Figure 4 and Figure 6 As shown, in this embodiment, the outer wall of the rod 312 has a limiting portion 3121, and the rotating sleeve 33 is sleeved on the rod 312 and is located between the oblique tongue portion 311 and the limiting portion 3121. In actual use, the limiting portion 3121 can be an integral structure with the rod 312, or can be a clip installed on the rod 312.

[0116] In actual use, the first elastic member 32 is a spring, a tension spring or a torsion spring. One end of the first elastic member 32 cooperates with the lock housing 2 , and the other end cooperates with the rod 312 directly or indirectly.

[0117] like Figures 15 to 20 As shown, the main bolt mechanism 4 of the lock body includes:

[0118] The main lock tongue body 41 is slidably disposed on the lock housing 2. The main lock tongue body 41 has a main lock tongue portion 411 and a main lock tongue plate 412 connected to each other. The main lock tongue plate 412 has a driving groove 4121. The main lock tongue body 41 has an extended state and a retracted state.

[0119] The main lock tongue toggle block 42 is rotatably mounted on the lock housing 2. The main lock tongue toggle block 42 can rotate around the first rotation axis 43. The main lock tongue toggle block 42 has a driving block 421 extending into the driving groove 4121. When the main lock tongue toggle block 42 rotates, the main lock tongue body 41 can be driven to slide through the cooperation of the driving block 421 and the driving groove 4121. The main lock tongue toggle block 42 has a first position and a second position. When the main lock tongue toggle block 42 is in the first position, the main lock tongue body 41 is in an extended state. When the main lock tongue toggle block 42 is in the second position, the main lock tongue body 41 is in a retracted state.

[0120] The pull rack 44 is slidably arranged on the lock housing 2, and the pull rack 44 is used to directly or indirectly mesh with the main lock tongue toggle block 42. When the pull rack 44 slides, it can drive the main lock tongue toggle block 42 to rotate. The pull rack 44 has a locking position and a release position. When the pull rack 44 is in the locking position, the main lock tongue toggle block 42 is in the second position. When the pull rack 44 is in the release position, the main lock tongue toggle block 42 is in the first position. The pull rack 44 has a locking portion 441, and the locking portion 441 is used to cooperate with the locking element 5. When the locking element 5 locks the locking portion 441, the pull rack 44 cannot slide, and the pull rack 44 is in the locking position. When the locking element 5 does not lock the locking portion 441, the pull rack 44 can slide and switch to the release position after being subjected to force;

[0121] The main lock tongue pop-up elastic member 45 is installed in the lock housing 2 and cooperates with the pulling rack 44 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] When the main lock tongue mechanism 4 of the present application is actually used, after the door is closed and the locking element 5 is unlocked, the main lock tongue pops out the elastic member 45 to drive the pulling rack 44 to move, so that the main lock tongue body 41 automatically pops out and switches to the extended state.

[0123] like Fig.17 and Fig.18As shown, in this embodiment, the main lock bolt mechanism 4 further includes a transmission member 46 rotatably mounted on the lock housing 2, the rotation member is relatively fixed to the main lock bolt toggle block 42, the rotation member and the main lock bolt toggle block 42 can rotate synchronously, the transmission member 46 has a tooth portion 461, and the pull rack 44 is engaged with the tooth portion 461. In actual use, the transmission member 46 may not be provided, in which case the main lock bolt toggle block 42 has a tooth portion 461, and the pull rack 44 is engaged with the tooth portion 461.

[0124] like Figures 15 to 20 As shown, the main locking tongue mechanism 4 also includes:

[0125] The rotating paddle 47 is rotatably mounted on the lock housing 2 and relatively fixed to the main lock tongue toggle block 42, and can rotate synchronously with the main lock tongue toggle block 42. The rotating paddle 47 has a first matching portion 471 disposed adjacent to the first rotation axis 43;

[0126] Lock cylinder 48, see Fig. 20 , mounted on the lock housing 2, the lock core 48 has a lock cam 481, and the lock cam 481 has an initial position and an unlocking position;

[0127] A lock paddle 49 is movably disposed on the lock housing 2. The lock paddle 49 has a pressure-receiving portion 491 and a second matching portion 492. The pressure-receiving portion 491 is located at one side of the lock core 48 and adjacent to the lock cam 481; and

[0128] During the process of the lock cam 481 rotating from the initial position to the unlocking position, the lock cam 481 contacts and cooperates with the pressure portion 491, driving the lock paddle 49 to move. After the lock paddle 49 moves, the second matching portion 492 contacts and cooperates with the first matching portion 471, driving the rotating paddle 47 and the main lock tongue toggle block 42 to rotate synchronously, so that the main lock tongue body 41 switches from the extended state to the retracted state. At the same time, the main lock tongue toggle block 42 drives the pulling rack 44 to slide to the locked position and lock with the locking element 5.

[0129] The main lock tongue mechanism 4 of the present application has a pressure-bearing portion 491 located on one side of the lock core 48 and adjacent to the lock cam 481. The lock cam 481 can drive the lock paddle 49 to move by rotating a small angle. The first matching portion 471 of the main lock tongue toggle block 42 is arranged adjacent to the first rotation axis 43. In this way, the first matching portion 471 only needs to move within a small range to achieve a larger rotation angle of the main lock tongue toggle block 42. The combination of the two ("the pressure-bearing portion 491 is located on one side of the lock core 48 and adjacent to the lock cam 481" and "the first matching portion 471 is arranged adjacent to the first rotation axis 43") can make the main lock tongue mechanism 4 rotate at a smaller angle when unlocking with a key, and the unlocking process takes a shorter time.

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

[0131] like Fig.17 and 18 As shown, in this embodiment, the main lock tongue plate 412 is located between the main lock tongue toggle block 42 and the rotating paddle 47;

[0132] The driving block 421 is inserted into the driving slot 4121;

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

[0134] In this way, the main locking tongue plate 412 is evenly stressed and is more stable and reliable during movement.

[0135] In this embodiment, the rotating paddle 47 further has a third matching portion 472. The third matching portion 472 and the first matching portion 471 are both located on the same side of the first rotating axis 43, and the distance between the third matching portion 472 and the first rotating axis 43 is greater than the distance between the first matching portion 471 and the first rotating axis 43.

[0136] The lock paddle 49 has a fourth matching portion 493 matching with the third matching portion 472;

[0137] During the process of the lock cam 481 rotating from the initial position to the unlocked position, the lock cam 481 contacts and cooperates with the pressed portion 491, driving the lock paddle 49 to move. At the beginning, the fourth matching portion 493 of the lock paddle 49 contacts and cooperates with the third matching portion 472, driving the rotating paddle 47 to rotate, and then the fourth matching portion 493 and the third matching portion 472 are no longer in contact and cooperate, but the second matching portion 492 contacts and cooperates with the first matching portion 471, continuing to drive the rotating paddle 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 toggle block 42 drives the pulling rack 44 to slide to the locked position and lock with the locking element 5.

[0138] The first matching portion 471 is arranged near the first rotation axis 43, which results in a smaller force arm. When the key is just turned, a larger force needs to be applied to the key. The present application arranges the third matching portion 472 (the distance between the third matching portion 472 and the first rotation axis 43 is greater than the distance between the first matching portion 471 and the first rotation axis 43) and the fourth matching portion 493 so that when the lock is just unlocked, the third matching portion 472 and the fourth matching portion 493 drive the rotating paddle 47 to rotate. Compared with the initial cooperation with the first matching portion 471, the force arm is increased, which can better drive the rotating paddle 47 to rotate. Then, the fourth matching portion 493 and the third matching portion 472 are no longer in contact and cooperation, but the second matching portion 492 and the first matching portion 471 are in contact and cooperation, continuing to drive the rotating paddle 47 to rotate, and finally the main lock tongue body 41 is switched from the extended state to the retracted state.

[0139] like Fig.16 As shown, in this embodiment, the first matching portion 471 and the third matching portion 472 are respectively located on two sides of the lock paddle 49 .

[0140] In this embodiment, the lock head paddle 49 is slidably disposed on the lock housing 2; the main lock tongue pop-up elastic member 45 is a spring, a torsion spring or a tension spring.

[0141] The latch mechanism 3 of this embodiment has an extended state and a retracted state; Fig.15 , Fig.16 and Fig.19 As shown, the lock body also includes:

[0142] A handle shaft 71 is rotatably mounted on the lock housing 2 and is used for mounting a handle; and

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

[0144] The lock paddle 49 also has an unlocking portion 494. During the process of the lock cam 481 rotating from the initial position to the unlocking position, the lock cam 481 contacts and cooperates with the second pressure-bearing portion 491, driving the lock paddle 49 to move. After the lock paddle 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 toggle block 42 drives the pulling rack 44 to slide to the locked position and lock it with the locking element 5. At the same time, the unlocking portion 494 abuts against the sixth matching portion 722 to rotate the handle paddle 72, and finally the inclined tongue mechanism 3 is switched from the extended state to the retracted state through the fifth matching portion 721 of the handle paddle 72.

[0145] Example 2

[0146] like Figure 21 to Figure 23 As shown, the difference between this embodiment and embodiment 1 is that:

[0147] One end of the small tongue portion 341 away from the mounting portion 342 has a protruding block 3411 protruding from the slide groove 31121, and the lock housing 2 has an avoidance groove 21 for the protruding block 3411 to be embedded in. When the inclined tongue mechanism 3 is in the closed state, the protruding block 3411 abuts against the buckle plate 1, and the protruding block 3411 is at least partially embedded in the avoidance groove 21.

[0148] The small tongue portion 341 has a portion protruding from the slide groove 31121. This arrangement can remain unchanged without changing the buckle plate 1 (the buckle plate 1 has various styles, and not changing the buckle plate 1 can effectively reduce the installation efficiency and cost of the lock body). When the inclined tongue mechanism 3 is in the door-opening state, the inclined tongue body 31 extends into the limiting hole 11 of the buckle plate 1, and because the small tongue portion 341 has a portion protruding from the slide groove 31121, the protruding portion can continue to contact the buckle plate 1, so that the inclined tongue attachment 34 is in a retracted state.

[0149] Compared with other structural forms, the configuration of the small tongue portion 341 does not increase the thickness of the lock body and does not require special design of the buckle plate 1.

[0150] like Fig.21 and Fig.23 As shown, in this embodiment, the side of the protruding block 3411 close to the mounting portion 342 has an inclined or arc-shaped first guide surface 34111, and the farther the protruding block 3411 is from the slide groove 31121, the smaller the thickness of the protruding block 3411; the avoidance groove 21 has a second guide surface 211 adapted to the guide surface.

[0151] The cooperation between the first guide surface 34111 and the second guide surface 211 will not affect the insertion of the protruding block 3411 into the avoidance groove 21 when the latch bolt mechanism 3 is in the closed state, but can reduce the amount of corresponding material that needs to be removed from the lock shell 2 due to the arrangement of the avoidance 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 provided, the protruding block 3411 is a block with a certain thickness, and a larger avoidance groove 21 is required at this time, which will remove more material and affect the structural strength.

[0152] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A lock body, used to cooperate with a gusset plate installed on a door frame, characterized in that: The lock body comprises: Lock case; A main deadbolt mechanism, mounted on the lock housing; A locking element, movably mounted on the lock housing, used to lock or unlock the main bolt mechanism, one side of the locking element has an escape opening, and the locking element has a locked state and an unlocked state; A resetting elastic member, mounted on the lock housing, for resetting the locking element; and A latch bolt mechanism, mounted on the lock housing; The inclined bolt mechanism comprises: The oblique tongue body is slidably arranged on the lock housing, and the oblique tongue body comprises an oblique tongue portion and a rod portion connected to each other; A first elastic member is disposed on the lock housing and is used to directly or indirectly cooperate with the oblique tongue body so that the oblique tongue body has a movement tendency to move toward the outside of the lock housing; A rotating sleeve is rotatably mounted on the oblique tongue portion and / or the rod portion, and the rotating sleeve can rotate around the axis of the rod portion. When the oblique tongue body slides, it can drive the rotating sleeve to synchronously slide axially. The rotating sleeve has a notch and a driving portion, and the driving portion is used to cooperate with the locking element; An oblique bolt attachment, the oblique bolt attachment has a small tongue portion and a mounting portion that are connected to each other, the mounting portion being slidably arranged on the rod portion of the oblique bolt body, and being able to drive the oblique bolt attachment to move into the lock housing when the oblique bolt body slides into the lock housing, the mounting portion being arranged on the outer side of the rod portion, the rotating sleeve being sleeved on the outer side of the mounting portion, the small tongue portion passing through the notch, a guiding structure being arranged between the mounting portion and the rotating sleeve, the guiding structure comprising a guiding groove and a guiding block extending into the guiding groove, one of the guiding groove and the guiding block being arranged on the oblique bolt attachment, and the other being arranged on the rotating sleeve, the guiding structure being used to enable the rotating sleeve to rotate relative to the oblique bolt attachment when the rotating sleeve moves axially relative to the oblique bolt attachment, thereby changing the position of the driving portion; and A second elastic member, directly or indirectly cooperating with the oblique bolt attachment, is used to make the oblique bolt attachment have a movement tendency to move toward the outside of the lock housing; The latch mechanism has a door-opening state, a door-not-fully-closed state, and a door-fully-closed state; When the latch bolt mechanism is in the door opening state, the latch bolt portion of the latch bolt body extends out of the lock housing, the small latch bolt portion of the latch bolt attachment extends out of the lock housing, the locking element is in the locking state, and the driving portion passes through the avoidance opening; When the latch mechanism is in a state where the door is not fully closed, the latch portion of the latch body is pressed to move and retract into the lock housing, and the latch attachment is also driven by the latch body to move and retract into the lock housing; When the latch mechanism is in the state of closing the door, the small tongue of the latch attachment abuts against the buckle plate, and the latch body slides out of the lock shell under the action of the first elastic member. The latch body will synchronously drive the rotating sleeve to move when sliding. When the rotating sleeve moves relative to the mounting portion, under the action of the mutually matched guide groove and guide block, the rotating sleeve rotates to change the position of the driving part. The driving part after changing its position will contact the locking element during the period of moving along the axial direction of the latch body, so that the locking element is switched from the locked state to the unlocked state. The guide groove at least includes a guide portion which is not parallel to the axis of the rod portion. When the latch mechanism changes from a door-unclosed state to a door-closed state, the guide block moves at least a certain distance in the guide portion.

2. The lock body according to claim 1, characterized in that: The mounting portion is slidably mounted on the rod portion, and when the latch bolt mechanism is in a door-opening state, the mounting portion abuts against the latch bolt portion; The guide groove is arranged on the rotating sleeve, and the guide block is arranged on the mounting portion; The outer side wall of the rod portion has a limiting portion, and the rotating sleeve is disposed on the rod portion and is located between the oblique tongue portion and the limiting portion; 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 housing, and the other end is directly or indirectly matched with the rod; 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.

3. The lock body according to claim 1, characterized in that: The oblique tongue portion has a pressure-bearing retracting surface and a thrust surface, the pressure-bearing retracting surface is an inclined surface or an arc-shaped surface, the thrust surface has a sliding groove, and the small tongue portion is slidably matched with the sliding groove; The small tongue has a portion protruding from the slide slot. When the oblique tongue mechanism is in a door-closed state, the end surface of the portion of the small tongue protruding from the slide slot contacts and cooperates with the buckle plate.

4. The lock body according to claim 3, characterized in that: The end of the small tongue portion away from the mounting portion has a protruding block protruding from the slide groove, and the lock shell has an avoidance groove for the protruding block to be embedded in. When the inclined tongue mechanism is in the closed state, the protruding block abuts against the buckle plate, and the protruding block is at least partially embedded in the avoidance groove.

5. The lock body according to claim 4, characterized in that: The protruding block has an inclined or arc-shaped first guide surface on one side close to the mounting portion, and the thickness of the protruding block decreases as the protruding block moves away from the slide groove; the avoidance groove has a second guide surface adapted to the guide surface.

6. The lock body according to claim 3, characterized in that: The buckle plate has a limiting hole for the inclined tongue body to be inserted into, and the buckle plate also has a convex portion extending into the limiting hole; the small tongue portion is completely embedded in the sliding groove, and when the inclined tongue mechanism is in the closed door position, the inclined tongue body extends into the limiting hole and the small tongue portion contacts and cooperates with the convex portion.

7. The lock body according to claim 1, characterized in that: The guide groove further comprises a first portion and a second portion, wherein the first portion, the guide portion and the second portion are connected in sequence; When the latch mechanism is in the door opening state or the door not fully closed state, the guide block is located at the first part or at the junction of the first part and the guide part; When the latch mechanism is in the door closing position, the guide block is located at the second part or at the junction of the second part and the guide part.

8. The lock body according to claim 1, characterized in that: The main locking tongue mechanism comprises: A main lock tongue body is slidably arranged on the lock housing, the main lock tongue body comprises a main lock tongue portion and a main lock tongue plate connected to each other, the main lock tongue plate comprises a driving groove, and the main lock tongue body has an extended state and a retracted state; A main lock tongue toggle block is rotatably mounted on the lock housing, the main lock tongue toggle block can rotate around a first rotation axis, the main lock tongue toggle block has a driving block extending into the driving groove, and when the main lock tongue toggle block rotates, the main lock tongue body can be driven to slide through the cooperation of the driving block and the driving groove, the main lock tongue toggle block has a first position and a second position, when the main lock tongue toggle block is in the first position, the main lock tongue body is in an extended state, and when the main lock tongue toggle block is in the second position, the main lock tongue body is in a retracted state; A pulling rack is slidably arranged on the lock housing, the pulling rack is used to directly or indirectly mesh with the main lock tongue toggle block, and can drive the main lock tongue toggle block to rotate when the pulling rack slides, the pulling rack has a locking position and a releasing position, when the pulling rack is in the locking position, the main lock tongue toggle block is in the second position, when the pulling rack is in the releasing position, the main lock tongue toggle block is in the first position, the pulling rack has a locking portion, the locking portion is used to cooperate with the locking element, when the locking element locks the locking portion, the pulling rack cannot slide, the pulling rack is in the locking position, and when the locking element does not lock the locking portion, the pulling rack can slide and switch to the releasing position after being subjected to force; The main lock tongue pops up the elastic member, which is installed in the lock housing and cooperates with the pulling rack to drive the pulling rack to slide to the release position when the locking element does not lock the locking part; A rotating paddle, rotatably mounted on the lock housing, relatively fixed to the main lock tongue toggle block, and capable of synchronously rotating with the main lock tongue toggle block, wherein the rotating paddle has a first matching portion disposed adjacent to the first rotation axis; A lock core is mounted on the lock housing, wherein the lock core has a lock cam, and the lock cam has an initial position and an unlocking position; A lock paddle, movably disposed on the lock housing, the lock paddle having a pressure-receiving portion and a second matching portion, the pressure-receiving portion being located at one side of the lock core and adjacent to the lock cam; and During the process of the lock cam rotating from the initial position to the unlocking position, the lock cam contacts and cooperates with the pressure-bearing part, driving the lock paddle to move. After the lock paddle moves, the second matching part contacts and cooperates with the first matching part, driving the rotating paddle and the main lock tongue toggle block to rotate synchronously, so that the main lock tongue body switches from the extended state to the retracted state. At the same time, the main lock tongue toggle block drives the pulling rack to slide to the locked position and locks with the locking element.

9. The lock body according to claim 1, characterized in that: The rotating paddle also has a third matching portion, the third matching portion and the first matching portion are both located on the same side of the first rotating axis, and the distance between the third matching portion and the first rotating axis is greater than the distance between the first matching portion and the first rotating axis; The lock paddle has a fourth matching portion that matches with the third matching portion; During the process of the lock cam rotating from the initial position to the unlocked position, the lock cam contacts and cooperates with the pressure-bearing part, driving the lock paddle to move. At the beginning, the fourth matching part of the lock paddle contacts and cooperates with the third matching part, driving the rotating paddle to rotate, and then the fourth matching part and the third matching part are no longer in contact and cooperate, but the second matching part contacts and cooperates with the first matching part, continuing to drive the rotating paddle to rotate, so that the main lock tongue body switches from the extended state to the retracted state, and at the same time, the main lock tongue toggle block drives the pulling rack to slide to the locked position and locks with the locking element.

10. The lock body according to claim 8, characterized in that: The main lock tongue toggle block has a tooth portion, and the pulling rack is engaged with the tooth portion, or the main lock tongue mechanism further includes a transmission member rotatably mounted on the lock housing, the rotating member is relatively fixed to the main lock tongue toggle block, the rotating member and the main lock tongue toggle block can rotate synchronously, the transmission member has a tooth portion, and the pulling rack is engaged with the tooth portion; The latch bolt mechanism has an extended state and a retracted state; the lock body also includes: The handle shaft is rotatably mounted on the lock housing and is used to install the handle; as well as A handle paddle is mounted on the handle shaft and can rotate relative to the handle shaft. The handle paddle has a fifth matching portion and a sixth matching portion. The fifth matching portion matches with the rod portion of the latch mechanism to switch the latch mechanism from an extended state to a retracted state. The lock paddle also has an unlocking portion. During the process of the lock cam rotating from the initial position to the unlocking position, the lock cam contacts and cooperates with the second pressure-bearing portion to drive the lock paddle to move. After the lock paddle moves, the main lock tongue body is switched from the extended state to the retracted state. At the same time, the main lock tongue toggle block drives the pulling rack to slide to the locked position and locks with the locking element. At the same time, the unlocking portion abuts against the sixth matching portion to rotate the handle paddle, and finally the inclined bolt mechanism is switched from the extended state to the retracted state through the fifth matching portion of the handle paddle.

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