CN221896419U - Lock set - Google Patents

Abstract

The application relates to a lockset, which comprises a lock shell, wherein a main lock mechanism, an oblique lock mechanism, a middle transmission mechanism and a clutch driving mechanism are arranged on the lock shell; the main lock mechanism comprises a main tongue, a main tongue plate and a lock tongue deflector rod, wherein the main tongue plate is fixedly connected to the inner side of the main tongue, and the other end of the main tongue plate is provided with a main tongue deflector head capable of driving the main tongue plate to drive the main tongue to stretch when the main tongue plate swings; the middle transmission mechanism comprises a main tongue transmission piece, an inclined tongue transmission piece and a handle stirring piece which are arranged in a stacked manner and can coaxially rotate, a transmission pin extends out of the end face of the main tongue transmission piece, a waist-shaped guide hole is formed in the inclined tongue transmission piece, a clutch stirring block is hinged to the inclined tongue transmission piece, the clutch stirring block can swing to a transmission position or a non-transmission position under the driving of the clutch driving mechanism, the transmission pin extends into the waist-shaped guide hole, and a first driving protrusion and a second driving protrusion are convexly arranged on the periphery of the handle stirring piece. The lock provided by the application has the advantages that the clutch structure acts more stably and reliably, the abrasion is reduced, and the occurrence of faults such as unlocking, locking and blocking is reduced.

Description

A lock

[Technical field]

The present application relates to the field of locks, and in particular to a lock using a novel clutch structure.

[Background technology]

Existing locks are generally equipped with two lock tongues, a slanted tongue and a square tongue. Among them, the slanted tongue is used as the first lock, and the square tongue is used as the second lock (commonly used for reverse locking) to jointly ensure the safety performance of the door lock.

Electric locks usually have a clutch structure that plays a role in power transmission after unlocking. The existing clutch structure is generally more complicated and the action is not smooth enough.

[Summary of the invention]

The purpose of the present application is to provide a lock whose clutch structure has more stable and reliable action, reduces wear and tear, and reduces the occurrence of malfunctions such as jamming during unlocking and locking.

This application is implemented through the following technical solutions:

A lock comprises a lock housing, wherein the lock housing is provided with a main lock mechanism, an oblique lock mechanism, a middle transmission mechanism and a clutch drive mechanism;

The main lock mechanism comprises a main tongue, a main tongue plate and a lock tongue lever, wherein the main tongue plate is fixedly connected to the inner side of the main tongue, one end of the lock tongue lever is provided with a driven gear rotatably connected to the lock housing, and the other end is provided with a main tongue lever head capable of driving the main tongue plate to drive the main tongue to extend and retract when swinging;

The middle transmission mechanism comprises a main tongue transmission member, an oblique tongue transmission member and a handle toggle member which are stacked and coaxially rotatable, a driving gear meshing with the driven gear is provided on one side of the main tongue transmission member, a transmission pin extends from the end surface of the main tongue transmission member, a waist-shaped guide hole and a clutch block are hinged on the oblique tongue transmission member, and the clutch block can swing to a transmission position or a non-transmission position under the drive of the clutch drive mechanism, the transmission pin extends into the waist-shaped guide hole, and a first driving protrusion and a second driving protrusion are convexly provided on the circumference of the handle toggle member;

When the handle toggle member rotates in the positive direction, the first driving protrusion pushes the clutch toggle block located at the transmission position to drive the oblique tongue transmission member to rotate, thereby driving the oblique lock mechanism to retract. At the same time, the waist-shaped guide hole drives the transmission pin and the driving gear to rotate, thereby driving the main tongue to retract.

When the handle toggle member rotates in the reverse direction, the second driving protrusion pushes the transmission pin to drive the driving gear to rotate, thereby driving the main tongue to extend.

The lock as described above, the clutch drive mechanism includes a clutch motor, a transmission plate, and a clutch push rod, the clutch motor is connected to the transmission plate to drive the transmission plate to do push-pull movement, the transmission plate is provided with a transmission notch, the clutch push rod includes a push rod section, a hinge section and a push rod section connected in sequence, the hinge section is hinged to the lock housing, the end of the push rod section extends into the transmission notch, and the end of the push rod section abuts against the clutch shift block;

When the clutch motor drives the transmission plate to perform push-pull motion, the clutch push rod is driven to swing, so as to drive the clutch shifting block to move.

In the lock as described above, the length of the first push rod section is longer than that of the second push rod section.

In the lock as described above, a clutch reset spring is provided between the clutch shift block and the latch transmission member, and the clutch reset spring can provide a force for the clutch shift block to swing to the non-transmission position.

In the lock as described above, the main tongue plate is fixedly connected to the inner side of the main tongue, a special-shaped hole and a limit hole are provided on the main tongue plate, and a pushing part and a pulling part are provided on the special-shaped hole;

One end of the lock tongue lever is provided with a driven gear rotatably connected to the lock housing and a sliding column coaxially arranged with the driven gear, and the other end of the lock tongue lever is provided with a main tongue shifting head which can drive the main tongue plate to drive the main tongue to extend and retract when swinging, and the main tongue shifting head is located in the special-shaped hole to push the pushing part or pull the retracting part, thereby driving the main tongue plate and the main tongue to extend and retract, and when the main tongue plate extends and retracts, the limiting hole is sleeved on the sliding column to slide.

In the lock as described above, the extending portion and the retracting portion are symmetrically arranged, and the extending portion comprises a clearance surface, a transition surface and a clamping top surface which are smoothly connected in sequence, and the transition surface protrudes from the clamping top surface and the clearance surface.

In the lock as described above, the outline of the card top surface is L-shaped, and the main tongue head has a corner surface adapted to the card top surface.

The lock as described above also includes a tensioning spring, one end of which is hinged to the lock housing, and the other end of which is hinged to the main tongue head. Under the elastic force of the tensioning spring, the main tongue head is pressed against the pushing portion when the main tongue is extended, and is pressed against the pulling portion when the main tongue is retracted.

The lock as described above further includes a lock core driving mechanism, the lock core driving mechanism includes a lock core cam, a lock core fork, a positioning pin, and a fork reset spring, the lock core cam is rotatably arranged on the lock housing, the fork reset spring is used to provide a centering force for the lock core fork, the lock core fork is sleeved on the positioning pin and can swing around the positioning pin, one end of the lock core fork can abut against the lock core cam, and the other end is provided with a first rotary dial portion and a second rotary dial portion arranged at a distance;

When the lock core cam rotates, it can drive the lock core shift fork to swing, thereby driving the first rotary shift part and the second rotary shift part of the lock core shift fork to swing.

As described above, the oblique locking mechanism includes an oblique tongue, an oblique tongue rod, an oblique tongue baffle, and an oblique tongue return spring. The inner side of the oblique tongue is connected to the oblique tongue rod. The oblique tongue baffle is arranged on the oblique tongue rod. The oblique tongue transmission member abuts against the oblique tongue baffle to drive the oblique tongue to retract. The oblique tongue return spring is sleeved on the oblique tongue rod to provide a force for the oblique tongue to extend.

Compared with the prior art, this application has the following advantages:

1. The clutch block is used to change the transmission state. Compared with the clutch matched with the pin slide slot, it is more stable and reliable, reduces wear and tear, and reduces the occurrence of faults such as unlocking and locking jams. Secondly, the transmission pin is used to move in the waist-shaped guide hole to achieve transmission and limit, which makes the operation more stable and the structure more reliable.

2. The first driving protrusion is provided with a groove, into which the clutch block falls when rotating, and the transmission is more stable.

3. Using the principle of lever, the clutch motor only needs a small force to push the clutch push rod to swing, saving effort and electricity.

4. The tensioning spring can make the main tongue head stably close to the pushing part or the pulling part, ensuring that the main tongue is not easy to passively escape from the unlocking or locking state.

【Brief Description of the Drawings】

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

FIG1 is a schematic structural diagram of the lock according to an embodiment of the present application in an unlocked state.

FIG. 2 is a first structural diagram of the lock in a locked state according to an embodiment of the present application.

FIG. 3 is a second structural schematic diagram of the lock in a locked state according to an embodiment of the present application.

FIG. 4 is a schematic diagram of the structural decomposition of the lock according to the embodiment of the present application.

[Specific implementation method]

In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

As shown in FIGS. 1 to 4 , the embodiment of the present application provides a lock, including a lock housing 1 , on which a main lock mechanism 2 , an oblique lock mechanism 3 , a middle transmission mechanism 4 and a clutch drive mechanism 5 are provided;

The main lock mechanism 2 includes a main tongue 21, a main tongue plate 22 and a lock tongue lever 23. The main tongue plate 22 is fixedly connected to the inner side of the main tongue 21. One end of the lock tongue lever 23 is provided with a driven gear 231 rotatably connected to the lock housing 1, and the other end is provided with a main tongue lever head 232 which can drive the main tongue plate 22 to drive the main tongue 21 to extend and retract when swinging.

The middle transmission mechanism 4 includes a main tongue transmission member 41, an oblique tongue transmission member 42 and a handle toggle member 43 which are stacked and coaxially rotatable. A driving gear 411 meshing with the driven gear 231 is provided on one side of the main tongue transmission member 41. A transmission pin 412 extends from the end face of the main tongue transmission member 41. The oblique tongue transmission member 42 is provided with a waist-shaped guide hole 421 and a clutch block 44 is hinged. The clutch block 44 can swing to a transmission position or a non-transmission position under the drive of the clutch drive mechanism 5. The transmission pin 412 extends into the waist-shaped guide hole 421. The circumferential side of the handle toggle member 43 is convexly provided with a first driving protrusion 431 and a second driving protrusion 432.

When the clutch block 44 is in the transmission position, the handle toggle member 43 is rotated along the first direction, and the first driving protrusion 431 pushes the clutch block 44 to drive the oblique tongue transmission member 42 to rotate; when the clutch block 44 is in the non-transmission position, the handle toggle member 43 is rotated along the first direction, and the handle toggle member 43 is in an idling state.

A clutch reset spring 441 is provided between the clutch block 44 and the latch transmission member 42, and the clutch reset spring 441 can provide a force for the clutch block 44 to swing to the non-transmission position. The handle toggle member 43 is connected to a handle spring for placing the handle toggle member 43 in an original position, and the original position is a position in which the door lock handle is in a horizontal position.

When the handle toggle member 43 rotates in the positive direction, the first driving protrusion 431 pushes the clutch toggle block 44 located in the transmission position to drive the oblique tongue transmission member 42 to rotate, thereby driving the oblique lock mechanism 3 to retract. At the same time, the waist-shaped guide hole 421 drives the transmission pin 412 and the driving gear 411 to rotate, thereby driving the main tongue 21 to retract; when the handle toggle member 43 rotates in the reverse direction, the second driving protrusion 432 pushes the transmission pin 412 to drive the driving gear 411 to rotate, thereby driving the main tongue 21 to extend.

This technical solution uses the clutch block 44 to change the transmission state, which is more stable and reliable than the clutch with the pin slide slot, reduces wear and reduces the occurrence of faults such as unlocking and locking. Secondly, the transmission pin 412 is used to move in the waist-shaped guide hole 421 to achieve transmission and limit, which makes the operation more stable and the structure more reliable.

Preferably, the first driving protrusion 431 is provided with a groove 4311 that can partially surround the clutch block 44. The clutch block 44 is pushed to the transmission position by other mechanisms, and when the groove 4311 of the first driving protrusion 431 rotates, the clutch block 44 falls into it, so that at this time, no other mechanism is needed to maintain the clutch block 44 in the transmission position, the design is ingenious, and the transmission is more stable.

For the convenience of description, the positive direction is clockwise and the reverse direction is counterclockwise. During the locking process, the handle toggle member 43 rotates counterclockwise, the second driving protrusion 432 pushes the transmission pin 412 to drive the main tongue transmission member 41 to rotate clockwise, and the driving gear 411 of the main tongue transmission member 41 drives the driven gear 231 to rotate clockwise, thereby driving the main tongue 21 to extend.

During the unlocking process, the clutch block 44 is first driven to the transmission position, the handle toggle member 43 rotates clockwise to the first position, the oblique tongue transmission member 42 and the main tongue transmission member 41 rotate clockwise at the same time, and the driving gear 411 drives the driven gear 231 to rotate counterclockwise, thereby driving the main tongue 21 to retract, and continue to rotate the handle toggle member 43 clockwise to the second position, the oblique tongue transmission member 42 drives the oblique tongue mechanism to realize the unlocking action, at this time the transmission pin 412 is located in the waist-shaped guide hole 421 close to one end of the clutch block 44, and then the handle toggle member 43 is released, and the oblique tongue transmission member 42 is reset under the elastic action of the oblique tongue mechanism, at this time the transmission pin 412 is located in the waist-shaped guide hole 421 away from one end of the clutch block 44.

The clutch drive mechanism 5 includes a clutch motor 51, a transmission plate 52, and a clutch push rod 53. The clutch motor 51 is connected to the transmission plate 52 to drive the transmission plate 52 to push and pull. The transmission plate 52 is provided with a transmission notch 521. The clutch push rod 53 includes a push rod first section 531, a hinged section 532, and a push rod second section 533 connected in sequence. The hinged section 532 is hinged to the lock housing 1. The end of the push rod first section 531 extends into the transmission notch 521, and the end of the push rod second section 533 abuts against the clutch shift block 44. When the clutch motor 51 drives the transmission plate 52 to push and pull, the clutch push rod 53 is driven to swing to drive the clutch shift block 44 to move. The clutch drive mechanism 5 uses the clutch push rod 53 to change the transmission direction of the transmission plate 52, thereby shifting the clutch shift block 44, and has a simple structure and reliable transmission.

Preferably, the length of the first push rod section 531 is longer than the second push rod section 533. Through this solution, by utilizing the principle of lever, the clutch motor 51 only needs a small force to push the clutch push rod 53 to swing, thus saving labor and electricity.

In the main locking mechanism 2 , the main tongue plate 22 is fixedly connected to the inner side of the main tongue 21 . The main tongue plate 22 is provided with a special-shaped hole 221 and a limiting hole 222 . The special-shaped hole 221 is provided with a pushing portion 2211 and a pulling portion 2212 .

One end of the lock tongue lever 23 is provided with a driven gear 231 rotatably connected to the lock housing 1 and a sliding column 233 coaxially arranged with the driven gear 231, and the other end of the lock tongue lever 23 is provided with a main tongue shifting head 232 which can drive the main tongue plate 22 to drive the main tongue 21 to extend and retract when swinging. The main tongue shifting head 232 is located in the special-shaped hole 221 to push the extension part 2211 or pull the retracting part 2212, thereby driving the main tongue plate 22 and the main tongue 21 to extend and retract. When the main tongue plate 22 extends and retracts, the limit hole 222 is sleeved on the sliding column 233 to slide.

Furthermore, the extending portion 2211 and the retracting portion 2212 are symmetrically arranged, and the extending portion 2211 includes a clearance surface 2211a, a transition surface 2211b and a card top surface 2211c which are smoothly connected in sequence, and the transition surface 2211b protrudes from the card top surface 2211c and the clearance surface 2211a.

When the lock tongue lever 23 swings upward, it slides over the clearance surface 2211a, the transition surface 2211b and the clamping top surface 2211c in sequence, and finally falls on the clamping top surface 2211c to stabilize the main tongue plate 22 in the extended state, especially to prevent the main tongue 21 from being shaken by external force, thereby having a better clamping effect.

In order to better understand the technical solution of this embodiment, its working principle is further explained as follows:

During the locking process, the driven gear 231 is driven to rotate clockwise, the lock tongue lever 23 swings clockwise, and the main tongue head 232 of the lock tongue lever 23 swings outward, resists and pushes the extension part 2211 of the special-shaped hole 221 to drive the main tongue plate 22 to move, and at the same time drives the main tongue 21 to extend outward to achieve the locking action.

During the unlocking process, the driven gear 231 is driven to rotate counterclockwise, the lock tongue lever 23 swings counterclockwise, and the main tongue head 232 of the lock tongue lever 23 swings outward, resists and pushes the retracting portion 2212 of the special-shaped hole 221 to drive the main tongue plate 22 to move, and at the same time drives the main tongue 21 to extend outward to achieve the locking action.

In this embodiment, the swinging end of the lock tongue lever 23 drives the main tongue 21 to extend and retract, and the limit block hole plays a guiding role in the extension and retraction, so that the extension and retraction action of the main tongue 21 is smoother and more reliable.

Furthermore, when the main tongue plate 22 is extended or retracted, the strip-shaped limiting hole 222 is sleeved on the sliding column 233 to slide, so as to guide the main tongue 21 to perform the extension and retraction movement. The sliding column 233 can be used as the rotation axis of the lock tongue lever 23 and also play a guiding role, so that the entire transmission device structure is more compact and the movement is reliable.

Optionally, the profile of the card top surface 2211c is L-shaped, and the main tongue head 232 has a corner surface that matches the card top surface 2211c. This profile matching setting can make the extension or retraction state of the main tongue 21 more stable.

When the lock tongue lever 23 swings, it rubs against at least one of the lock housing 1 and the main tongue plate 22, so that damping is generated when the main tongue 21 moves. It can provide appropriate resistance to the movement of the main tongue and effectively prevent the main tongue from being easily retracted.

The lock of this embodiment further includes a tension spring 24, one end of which is hinged to the lock housing 1, and the other end is hinged to the main tongue head 232. Under the elastic force of the tension spring 24, the main tongue head 232 is pressed against the extension portion 2211 when the main tongue 21 is extended, and is pressed against the retracting portion 2212 when the main tongue 21 is retracted. Preferably, the tension spring 24 is in a herringbone shape and is in a tensioned state stretched outward, that is, a compression spring. Of course, the tension spring 24 can also be set as a tension spring of other shapes to provide a force to press against the extension portion 2211 or the retracting portion 2212. The tension spring 24 of this embodiment can make the main tongue head 232 stably press against the extension portion 2211 or the retracting portion 2212, ensuring that the main tongue 21 is not easily passively disengaged from the unlocked or locked state.

The lock of this embodiment also includes a lock core driving mechanism 6 with a simple structure, compact layout and reliable driving. The lock core driving mechanism 6 includes a lock core cam 61, a lock core fork 62, a positioning pin 63, and a fork reset spring 64. The lock core cam 61 is rotatably arranged on the lock housing 1. The lock core cam 61 can be rotated by a motor or manually. The fork reset spring 64 is used to provide a centering force for the lock core fork 62. The lock core fork 62 is sleeved on the positioning pin 63 and can swing around the positioning pin 63. One end of the lock core fork 62 can abut against the lock core cam 61, and the other end is provided with a first rotary dial portion 621 and a second rotary dial portion 622 that are separated from each other.

In order to better understand the present solution, the working principle of the lock core driving mechanism 6 is further described as follows:

When the lock core cam 61 rotates clockwise, it can drive the lock core fork 62 to swing counterclockwise, driving the first rotary dial portion 621 of the lock core fork 62 to push the oblique tongue transmission member 42 to rotate clockwise. Among them, the oblique tongue transmission member 42 is provided with a flange corresponding to the first rotary dial portion 621.

When the lock core cam 61 rotates counterclockwise, it can drive the lock core fork 62 to swing clockwise, driving the second rotary dial portion 622 of the lock core fork 62 to push the main tongue transmission member 41 to rotate counterclockwise. Among them, the main tongue transmission member 41 is provided with a boss corresponding to the second rotary dial portion 622.

The oblique locking mechanism 3 of this embodiment includes an oblique tongue 31, an oblique tongue rod 32, an oblique tongue baffle 33, and an oblique tongue return spring 34. The inner side of the oblique tongue 31 is connected to the oblique tongue rod 32. The oblique tongue baffle 33 is arranged on the oblique tongue rod 32. The oblique tongue transmission member 42 abuts against the oblique tongue baffle 33 to drive the oblique tongue 31 to retract. The oblique tongue return spring 34 is sleeved on the oblique tongue rod 32 to provide a force for the oblique tongue 31 to extend.

It should be understood that the terms "first", "second", etc. are used in this application to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying 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.

As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of this application is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of this application, or some technical deductions or replacements made based on the concept of this application should be considered as the protection scope of this application.

Claims (10)

1. The lockset is characterized by comprising a lock shell (1), wherein a main lock mechanism (2), an oblique lock mechanism (3), a middle transmission mechanism (4) and a clutch driving mechanism (5) are arranged on the lock shell;

The main lock mechanism (2) comprises a main tongue (21), a main tongue plate (22) and a lock tongue deflector rod (23), wherein the main tongue plate (22) is fixedly connected to the inner side of the main tongue (21), one end of the lock tongue deflector rod (23) is provided with a driven gear (231) rotatably connected with the lock shell (1), and the other end of the lock tongue deflector rod is provided with a main tongue deflector head (232) capable of driving the main tongue plate (22) to drive the main tongue (21) to stretch when swinging;

The middle transmission mechanism (4) comprises a main tongue transmission member (41), an inclined tongue transmission member (42) and a handle poking member (43) which are arranged in a stacked manner and can coaxially rotate, a driving gear (411) meshed with the driven gear (231) is arranged on one side of the main tongue transmission member (41), a transmission pin (412) extends out of the end face of the main tongue transmission member (41), a kidney-shaped guide hole (421) is arranged on the inclined tongue transmission member (42) and a clutch poking block (44) is hinged to the inclined tongue transmission member (42), the clutch poking block (44) can swing to a transmission position or a non-transmission position under the driving of the clutch driving mechanism (5), the transmission pin (412) extends into the kidney-shaped guide hole (421), and a first driving protrusion (431) and a second driving protrusion (432) are convexly arranged on the periphery of the handle poking member (43);

When the handle poking piece (43) rotates in the positive direction, the first driving protrusion (431) pushes the clutch poking block (44) positioned at the transmission position to drive the inclined tongue transmission piece (42) to rotate so as to drive the inclined lock mechanism (3) to retract, and meanwhile, the kidney-shaped guide hole (421) drives the transmission pin (412) and the driving gear (411) to rotate so as to drive the main tongue (21) to retract;

When the handle poking piece (43) rotates along the reverse direction, the second driving protrusion (432) pushes the transmission pin (412) to drive the driving gear (411) to rotate, so that the main tongue (21) is driven to extend.

2. The lock according to claim 1, wherein the clutch driving mechanism (5) comprises a clutch motor (51), a transmission plate (52) and a clutch push rod (53), the clutch motor (51) is connected with the transmission plate (52) to drive the transmission plate (52) to do push-pull motion, a transmission gap (521) is formed in the transmission plate (52), the clutch push rod (53) comprises a first push rod section (531), a hinge section (532) and a second push rod section (533) which are sequentially connected, the hinge section (532) is hinged to the lock shell (1), the end part of the first push rod section (531) stretches into the transmission gap (521), and the end part of the second push rod section (533) is abutted against the clutch shifting block (44);

When the clutch motor (51) drives the transmission plate (52) to do push-pull motion, the clutch push rod (53) is driven to swing so as to drive the clutch shifting block (44) to act.

3. The lock according to claim 2, characterized in that the length of the first segment (531) of the push rod is longer than the second segment (533) of the push rod.

4. The lock according to claim 1, characterized in that a clutch return spring (441) is arranged between the clutch-dial (44) and the cam transmission (42), said clutch return spring (441) being able to provide a force for the clutch-dial (44) to oscillate to the non-transmission position.

5. The lock according to claim 1, wherein the main tongue plate (22) is fixedly connected to the inner side of the main tongue (21), a special-shaped hole (221) and a limiting hole (222) are formed in the main tongue plate (22), and a pushing part (2211) and a pulling part (2212) are formed in the special-shaped hole (221);

The utility model discloses a lock tongue driving lever, including lock shell (1), lock tongue driving lever (23), main tongue driving lever (23), limit hole (222) cover, main tongue driving lever (23) one end be equipped with rotatable connect in driven gear (231) of lock shell (1) and with follower (231) coaxial slip post (233) that set up, the lock tongue driving lever (23) other end is equipped with can drive main tongue (21) flexible main tongue driving head (232) of main tongue (22) when the swing, main tongue driving head (232) are located in dysmorphism hole (221) are in order to push away stretching portion (2211) or tractive draw portion (2212), and then drive main tongue (22) and main tongue (21) are flexible, limit hole (222) cover is located during main tongue (233) slip.

6. The lock according to claim 5, wherein the pushing portion (2211) and the pulling portion (2212) are symmetrically arranged, the pushing portion (2211) includes a clearance surface (2211 a), a transition surface (2211 b) and a card top surface (2211 c) which are sequentially and smoothly connected, and the transition surface (2211 b) protrudes from the card top surface (2211 c) and the clearance surface (2211 a).

7. The lock according to claim 6, wherein the card top surface (2211 c) is L-shaped in profile, and the main tongue (232) has corner surfaces adapted to the card top surface (2211 c).

8. The lock according to claim 7, further comprising a tension spring (24), wherein one end of the tension spring (24) is hinged to the lock case (1), and the other end is hinged to the main tongue poking head (232), and under the elastic force of the tension spring (24), the main tongue poking head (232) is abutted against the push-extension portion (2211) when the main tongue (21) is extended, and is abutted against the pull-shrinkage portion (2212) when the main tongue (21) is retracted.

9. The lock according to claim 1, further comprising a lock cylinder driving mechanism (6), wherein the lock cylinder driving mechanism (6) comprises a lock cylinder cam (61), a lock cylinder fork (62), a positioning pin (63) and a fork return spring (64), the lock cylinder cam (61) is rotatably arranged on the lock case (1), the fork return spring (64) is used for providing centering force for the lock cylinder fork (62), the lock cylinder fork (62) is sleeved on the positioning pin (63) and can swing around the positioning pin (63), one end of the lock cylinder fork (62) can be abutted against the lock cylinder cam (61), and a first rotary shifting part (621) and a second rotary shifting part (622) which are arranged at intervals are arranged at the other end of the lock cylinder fork (62);

When the lock cylinder cam (61) rotates, the lock cylinder shifting fork (62) can be shifted to swing, and the first rotary shifting part (621) and the second rotary shifting part (622) of the lock cylinder shifting fork (62) are driven to swing.

10. The lock according to claim 1, wherein the latch mechanism (3) comprises a latch (31), a latch lever (32) and a latch baffle (33), a latch return spring (34) is connected to the inner side of the latch (31) and is connected to the latch lever (32), the latch baffle (33) is arranged on the latch lever (32), the latch transmission member (42) abuts against the latch baffle (33) to drive the latch (31) to retract, and the latch return spring (34) is sleeved on the latch lever (32) and is used for providing an extending force for the latch (31).