Lock

Abstract

The utility model discloses a lock which comprises a shell assembly, a panel, a lock cylinder, a handle assembly, a latch bolt assembly, a latch bolt driving assembly, a spring bolt and a spring bolt driving assembly. The housing assembly includes a front cover and a rear housing. The front cover is fixedly arranged on the rear shell to form a shell with an inner cavity. The lock cylinder is arranged on the shell in an inserted mode and fixedly connected with the panel, and a shifting block is arranged on the lock cylinder. The latch bolt assembly comprises a latch bolt. The key point is that the handle assembly comprises a front handle. And the front handle is rotationally arranged on the front cover. The latch bolt assembly further comprises a latch bolt installation base, the latch bolt is fixedly arranged on the latch bolt installation base, and the latch bolt installation base is arranged in the shell assembly in a sliding mode in the left-right direction. The front handle or the lock cylinder drives the latch bolt to move through the latch bolt driving assembly. The front handle drives the spring bolt to move through the latch bolt driving assembly. The lock cylinder drives the lock tongue to move through the lock tongue driving assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a lock which can be unlocked at any time from the inside. Background Art

[0002] Typically, once a door lock is locked with a key from the outside, it cannot be unlocked from inside using the handle. To open the door from inside, the key is also required. However, in real life, a door lock is sometimes accidentally locked from the outside, and the person inside (such as a child) is unable to unlock the door with a key, making it impossible to open the door from the inside. Alternatively, to improve safety, a door lock is locked from inside using a key. In an emergency situation requiring exit (such as a fire or earthquake), the person must align the key with the keyhole, insert the key into the keyhole, and then turn the key to open the door. This process takes more time than usual, potentially delaying rescue or escape attempts. Chinese patent document CN105421890B discloses a lock comprising a panel, a housing assembly, a bolt assembly, a latch bolt assembly, a stop block, a toggle block, a toggle block spring, a cover plate, a fourth rotor, a third rotor, a second rotor, and a first rotor. This lock eschews the traditional safety knob in favor of a completely new and rational mechanical design. After locking the lock, simply pull it down to simultaneously unlock the deadbolt and latch bolt, facilitating escape and providing time for those caught in natural disasters. However, the second rotor constantly idles within the first rotor, requiring a key from outside the door to unlock the latch bolt assembly. This design locks and unlocks the deadbolt using a handle both inside and outside the door. This handle has two movements, one upward and one downward, which doesn't align with typical operating habits (the handle only pulls down) and can be easily misoperated in emergencies. Utility Model Content

[0003] The utility model aims to provide a lock which is easy to operate and can unlock the deadbolt by a handle inside the house.

[0004] The basic technical solution for achieving the purpose of the utility model is: a lock comprising a housing assembly, a panel, a lock cylinder, a handle assembly, a latch bolt assembly, a latch bolt drive assembly, a lock bolt, and a latch bolt drive assembly. The housing assembly comprises a front cover and a rear housing. The front cover is fixedly mounted on the rear housing to form a housing having an internal cavity. The lock cylinder is plugged into the housing and fixedly connected to the panel, and a shift block is provided on the lock cylinder. The latch bolt assembly comprises a latch bolt. Its structural features are: the handle assembly comprises a front handle. The front handle is rotatably mounted on the front cover. The latch bolt assembly also comprises a latch bolt mounting seat, the latch bolt being fixedly mounted on the latch bolt mounting seat, and the latch bolt mounting seat being slidably mounted in the housing assembly in the left and right directions. The latch bolt is driven to move by the front handle or the lock cylinder via the latch bolt drive assembly. The front handle drives the lock bolt to move via the latch bolt drive assembly. The lock cylinder drives the lock bolt to move via the latch bolt drive assembly.

[0005] Furthermore, in order to unlock the latch bolt through both the handle and the lock core, the latch bolt drive assembly includes a latch bolt lock core seat, a first unlocking plate, a second unlocking plate and a lock core drive plate.

[0006] The oblique bolt lock core seat is rotatably arranged in the housing assembly. An unlocking drive portion is provided at the lower left side of the oblique bolt lock core seat, and a forward-protruding rotation connection portion is provided at the front side of the oblique bolt lock core seat.

[0007] The first unlocking plate is rotatably arranged on the rotating connection part of the inclined bolt lock cylinder seat. The upper part of the first unlocking plate is provided with a first inclined bolt driving part. The first inclined bolt driving part cooperates with the driving part on the inclined bolt mounting seat to drive the inclined bolt mounting seat to slide to the right, so that the inclined bolt retracts.

[0008] The second unlocking plate is pivotally mounted on the pivoting connection of the latch bolt cylinder seat, located in front of the first unlocking plate. A second latch bolt driver is located on the upper portion of the second unlocking plate. This driver cooperates with a driver on the latch bolt mounting base to drive the latch bolt mounting base to slide rightward, retracting the latch bolt.

[0009] The lock core driving plate is hingedly connected to the lower left portion of the second unlocking plate, and the lock core drives the second unlocking plate to rotate clockwise to unlock through the lock core driving plate.

[0010] Furthermore, to maintain the front handle in an unlocked state, the handle assembly further includes a handle reset assembly, which comprises a reset seat, a reset drive rod, and a handle reset spring. The reset seat is fixed to the rear housing, and the reset drive rod is vertically slidable on the reset seat. The handle reset spring is sleeved around the reset drive rod to generate a force that drives the reset drive rod upward. The reset drive rod is hingedly connected to the right side of the latch bolt lock cylinder seat.

[0011] Furthermore, in order to adapt to different door opening directions, the inclined tongue is detachably fixed on the inclined tongue mounting seat in a mirror-image manner.

[0012] Furthermore, in order to keep the oblique tongue in an extended state, the oblique tongue assembly further includes an oblique tongue return spring, which is arranged in the housing assembly to cause the oblique tongue mounting seat to extend outward.

[0013] Furthermore, in order to unlock the deadbolt and latch bolt via the front handle inside the door, the latch bolt drive assembly includes a latch bolt lock cylinder seat. The latch bolt lock cylinder seat is rotatably mounted in the housing assembly. An unlocking drive unit is provided at the lower left portion of the latch bolt lock cylinder seat.

[0014] A lock tongue locking portion is provided on the left side of the lock tongue, and a linkage groove is also provided on the right side of the lock tongue.

[0015] The bolt drive assembly includes a drive seat, a linkage seat, a linkage pin, a linkage plate and a linkage block.

[0016] The drive seat is arranged in the housing assembly along the left and right sliding direction, and the drive seat drives the lock tongue to move left and right. The lower side of the drive seat is provided with a toggle part that cooperates with the toggle block. The toggle part is toggled left and right by the toggle block, thereby driving the lock tongue to extend or retract.

[0017] The lower portion of the linkage seat is rotatably mounted in the housing assembly, and the linkage pin is fixedly mounted on the upper portion of the linkage seat and located in the linkage slot. Thus, when the linkage seat rotates, the locking tongue is driven to move left and right via the linkage pin. The upper end of the linkage block is rotatably mounted in the housing assembly, and the upper portion of the linkage plate is rotatably connected to the lower end of the linkage block. A second linkage slot is provided on the linkage plate, and the front end of the linkage pin is located in the second linkage slot. When the oblique bolt lock cylinder seat is rotated clockwise by the front handle, the unlocking drive unit pushes the upper portion of the linkage plate, causing the linkage plate to rotate counterclockwise. The lower portion of the linkage plate drives the linkage pin backward via the second linkage slot, thereby causing the locking tongue to move to the right and retract. This unlocks the oblique bolt and the locking tongue simultaneously with the front handle.

[0018] Furthermore, to prevent accidental inspection of the lock tongue, the lock tongue drive assembly also includes a stopper. A first latching block is located on the right side of the middle portion of the drive seat. The stopper slides vertically within the housing assembly. A hook is located on the upper right end of the stopper, engaging the first latching block. The lock cylinder's shifting block drives the stopper upward, disengaging the hook from the first latching block.

[0019] The present invention has the following beneficial effects: (1) The lock of the present invention is easy to operate. When the lock tongue is locked by a key through the lock cylinder from outside or inside the door, the lock tongue and the inclined tongue can be unlocked simultaneously by the front handle inside the door, which greatly facilitates the convenience of opening the door inside the house and greatly improves the safety of use. It avoids the unfavorable situation such as panic caused by the inability to open the lock by people inside the house. (2) The lock of the present invention can only be operated by the front handle (that is, the handle located inside the house). The lock tongue can only be locked by the key from outside the house. It is not easy to operate by mistake, has good reliability and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the lock of the present invention when the lock tongue assembly is in the open state.

[0021] Figure 2 for Figure 1 Schematic top view of .

[0022] Figure 3 for Figure 1 Rear view of

[0023] Figure 4 For Figure 1 Schematic diagram when viewed from the lower left front.

[0024] Figure 5 For Figure 1 Schematic diagram when viewed from the upper right front.

[0025] Figure 6 For Figure 1 A schematic structural diagram of the lock tongue assembly in the locked state when viewed from the upper left front.

[0026] Figure 7 For Figure 1 A schematic diagram of the structure of the lock tongue assembly in the locked state when viewed from the upper right rear.

[0027] Figure 8 For Figure 1 Schematic diagram of the structure when the lock cylinder is unlocked when viewed from the upper left front.

[0028] Figure 9 For Figure 1 Schematic diagram of the structure when it is unlocked by the lock cylinder when viewed from the upper right rear.

[0029] Figure 10 It is a structural diagram of the handle reset assembly.

[0030] Figure 11 It is a structural schematic diagram of the inclined tongue assembly.

[0031] Figure 12 It is a structural diagram of the oblique tongue lock cylinder seat.

[0032] Figure 13 It is a structural diagram of the latch bolt drive assembly.

[0033] Figure 14 This is a schematic diagram of the latch bolt drive assembly after the second unlocking plate is driven away.

[0034] Figure 15 It is a structural diagram of the lock tongue.

[0035] Figure 16 It is a schematic diagram of the lock tongue and linkage seat.

[0036] Figure 17 A schematic diagram of the bolt drive assembly.

[0037] Figure 18 The figure is a schematic diagram of the bolt drive assembly as viewed from the rear.

[0038] The reference numerals in the accompanying drawings are:

[0039] Housing assembly 1, rear housing 1-1,

[0040] Panel 2, lock cylinder 3, dial block 3-1,

[0041] Handle assembly 4, front handle 4-1, connecting column 4-11, handle reset assembly 4-2, reset seat 4-21, reset drive rod 4-22, handle reset spring 4-23,

[0042] Oblique tongue assembly 5, oblique tongue 5-1, oblique tongue mounting seat 5-2, driving part 5-21, oblique tongue return spring 5-3,

[0043] Oblique bolt drive assembly 6, oblique bolt lock cylinder seat 6-1, limit hook 6-11, unlocking drive part 6-12, rotating connection part 6-13, square hole 6-14, limit block 6-131, first unlocking plate 6-2, first oblique bolt drive part 6-21, slot 6-22, second unlocking plate 6-3, second oblique bolt drive part 6-31, lock cylinder drive plate 6-4, state adjustment slot 6-41, first limit pin 61,

[0044] Lock tongue 7, lock tongue locking part 7-1, lock tongue driving block 7-2, linkage groove 7-3,

[0045] Lock tongue drive assembly 8, drive seat 8-1, lock tongue drive slot 8-11, first clamping block 8-12, toggle part 8-13, limit seat 8-2, drive spring 8-22, hook 8-21, linkage seat 8-3, linkage pin 8-4, linkage plate 8-5, linkage block 8-6, triangular spring 8-7, positioning device 8-8, positioning block 8-81, elastic positioning block 8-82. DETAILED DESCRIPTION

[0046] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings. Figure 1 The direction shown is carried out, that is, Figure 1 The up, down, left, and right directions shown are the up, down, left, and right directions described. Figure 1 The direction is forward, away from Figure 1 The rear side is the opposite side. Terms such as "first" and "second" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance. Terms such as "upper," "lower," "inner," and "outer" indicate directions or positional relationships based on the positional relationships depicted in the accompanying drawings and are intended solely to facilitate or simplify the description of the present invention. They do not necessarily indicate a specific orientation.

[0047] (Example 1)

[0048] See Figures 1 to 18 The lock of the present invention includes a housing assembly 1, a panel 2, a lock core 3, a handle assembly 4, a latch bolt assembly 5, a latch bolt drive assembly 6, a lock bolt 7 and a lock bolt drive assembly 8.

[0049] See Figures 1 to 5The shell assembly 1 comprises a front cover (not shown in the figure) and a rear shell 1-1. The front cover is fixedly arranged on the rear shell 1-1 to form a shell having an internal cavity, and the left side of the shell is provided with a latch hole and a lock tongue hole penetrating the inside and outside. The faceplate 2 is fixedly arranged on the left side of the shell and is provided with through holes corresponding to the latch hole and the lock tongue hole on the shell. The lock cylinder 3 is insertedly arranged on the shell and is fixedly connected with the faceplate 2, and the lock cylinder 3 is provided with a knob 3-1. The handle assembly 4 comprises a front handle 4-1, a rear handle (not shown in the figure) and a handle reset assembly 4-2, and the front handle 4-1 is rotatably arranged on the front cover. The rear part of the front handle 4-1 is provided with a connecting column 4-11 in the shape of a square section. The front handle 4-1 is the handle located on the inside of the house. The rear handle is fixedly arranged on the corresponding door and is located on the outside of the house.

[0050] See Figure 1 and Figure 10 The handle reset assembly 4-2 comprises a reset seat 4-21, a reset driving rod 4-22 and a handle reset spring 4-23. The reset seat 4-21 is fixedly arranged on the rear shell 1-1, the reset driving rod 4-22 is slidingly arranged on the reset seat 4-21 in the up-down direction, and the handle reset spring 4-23 is sleeved on the reset driving rod 4-22 to generate a force for driving the reset driving rod 4-22 upward.

[0051] See Figure 1 and Figure 11 The latch assembly 5 comprises a latch 5-1, a latch mounting seat 5-2 and a latch reset spring 5-3. The latch 5-1 is fixedly arranged on the latch mounting seat 5-2 in a mirror image manner, that is, the fixed direction of the latch 5-1 when closing the door can be changed, so that the adaptability of the latch can be improved and the latch can be used for different door opening directions. The latch mounting seat 5-2 is slidingly arranged in the shell assembly 1 in the left-right direction. The latch reset spring 5-3 is arranged in the shell assembly 1 to generate a force for extending the latch mounting seat 5-2 outward, so that the latch 5-1 is kept in the extended state. The latch mounting seat 5-2 is provided with a driving part 5-21. The latch 5-1 is driven to retract and unlock by the latch driving assembly 6 through the front handle 4-1 or the lock cylinder 3.

[0052] See Figures 1 to 9 and Figures 12 to 14 The latch driving assembly 6 comprises a latch lock cylinder seat 6-1, a first unlocking plate 6-2, a second unlocking plate 6-3 and a lock cylinder driving plate 6-4.

[0053] The latch tongue lock core seat 6-1 is rotationally arranged in the housing assembly 1. The upper left side of the latch tongue lock core seat 6-1 is provided with a limiting hook 6-11, and the lower left side is provided with an unlocking driving part 6-12. The front side of the latch tongue lock core seat 6-1 is provided with a rotationally connected part 6-13 protruding forward, and the rotationally connected part 6-13 is provided with a limiting block 6-131 protruding outward in the radial direction. The housing assembly 1 is provided with a first limiting pin 61, which cooperates with the limiting hook 6-11 to limit the circumferential movement of the latch tongue lock core seat 6-1. The reset driving rod 4-22 is hingedly connected to the right side of the latch tongue lock core seat 6-1, so that the latch tongue lock core seat 6-1 is rotated counterclockwise to reset by the reset driving rod 4-22. The middle of the latch tongue lock core seat 6-1 is provided with a square hole 6-14 matched with the connecting column 4-11 of the front handle 4-1, and the connecting column 4-11 of the front handle 4-1 is inserted into the square hole 6-14, so that the latch tongue lock core seat 6-1 is driven to rotate by the front handle 4-1.

[0054] The first unlocking plate 6-2 is rotationally arranged on the rotationally connected part 6-13 of the latch tongue lock core seat 6-1, and the upper part of the first unlocking plate 6-2 is provided with a first latch tongue driving part 6-21 matched with the driving part 5-21 on the latch tongue mounting seat 5-2, which drives the latch tongue mounting seat 5-2 to slide rightward to retract the latch tongue 5-1. The first unlocking plate 6-2 is provided with a clamping groove 6-22 matched with the limiting block 6-131 on the rotationally connected part 6-13. The front side of the first latch tongue driving part 6-21 is limited by the first limiting pin 61. When the latch tongue lock core seat 6-1 is rotated counterclockwise by rotating the front handle 4-1, the limiting block 6-131 drives the first unlocking plate 6-2 to rotate counterclockwise, so that the first latch tongue driving part 6-21 drives the latch tongue mounting seat 5-2 to slide rightward through the driving part 5-21 of the latch tongue mounting seat 5-2 to retract the latch tongue 5-1.

[0055] The second unlocking plate 6-3 is rotationally arranged on the rotationally connected part 6-13 of the latch tongue lock core seat 6-1, located in front of the first unlocking plate 6-2. The upper part of the second unlocking plate 6-3 is provided with a second latch tongue driving part 6-31 matched with the driving part 5-21 on the latch tongue mounting seat 5-2, which drives the latch tongue mounting seat 5-2 to slide rightward to retract the latch tongue 5-1.

[0056] The lock core driving plate 6-4 is hingedly connected to the lower left part of the second unlocking plate 6-3, and drives the second unlocking plate 6-3 to rotate clockwise to unlock through the lock core driving plate 6-4. When the plug 3-1 of the lock core 3 is rotated by the key, the plug 3-1 pushes the lock core driving plate 6-4 upward, and then the lock core driving plate 6-4 drives the second unlocking plate 6-3 to rotate clockwise, so that the second latch tongue driving part 6-31 drives the latch tongue mounting seat 5-2 to slide rightward through the driving part 5-21 of the latch tongue mounting seat 5-2 to retract the latch tongue 5-1. The lock core driving plate 6-4 is provided with a state adjusting groove 6-41 penetrating through the front and back thereof.

[0057] See Figures 1 to 9 and Figures 15 to 18 , the lock tongue 7 left side is equipped with the lock tongue lock part 7-1, the right part rear side is equipped with the lock tongue drive block 7-2 that protrudes to the rear. The lock tongue 7 right part is also equipped with the linkage groove 7-3.

[0058] See Figures 1 to 9 、 Figure 17 and Figure 18 , the lock tongue drive assembly 8 includes drive seat 8-1, limit seat 8-2, linkage seat 8-3, linkage pin 8-4, linkage plate 8-5, linkage block 8-6, triangular spring 8-7 and positioning device 8-8.

[0059] Drive seat 8-1 is slidably arranged in the shell assembly 1 along the left and right directions, and the drive seat 8-1 is provided with a lock tongue drive groove 8-11 in the middle part. The lock tongue drive block 7-2 of the lock tongue 7 cooperates with the lock tongue drive groove 8-11. When the drive seat 8-1 moves left and right, the lock tongue 7 is driven to move left and right by the lock tongue drive block 7-2. The drive seat 8-1 is provided with a first clamping block 8-12 in the middle right part. The lower side of the drive seat 8-1 is provided with a pushing part 8-13 which cooperates with the push block 3-1. The pushing part 8-13 is pushed left and right by the push block 3-1, thereby driving the lock tongue 7 to extend or retract.

[0060] The limit seat 8-2 is slidably arranged in the shell assembly 1 along the up and down directions, and the right upper end of the limit seat 8-2 is provided with a clamping hook 8-21 which cooperates with the first clamping block 8-12. The limit seat 8-2 is driven to move upward by the push block 3-1 of the lock cylinder 3, so that the clamping hook 8-21 is disengaged from the first clamping block 8-12. The limit seat 8-2 is provided with a drive spring 8-22, which drives the limit seat 8-2 to move downward and reset.

[0061] The linkage seat 8-3 is rotatably arranged in the shell assembly 1 in the lower part, and the linkage pin 8-4 is fixedly arranged on the upper part of the linkage seat 8-3 and located in the linkage groove 7-3. Thus, when the linkage seat 8-3 rotates, the lock tongue 7 is driven to move left and right by the linkage pin 8-4. The front end of the linkage pin 8-4 is located in the state adjusting groove 6-41 of the lock cylinder drive plate 6-4. The upper end of the linkage block 8-6 is rotatably arranged in the shell assembly 1, and the upper end of the linkage plate 8-5 is rotatably connected to the lower end of the linkage block 8-6. The linkage plate 8-5 is provided with a second linkage groove 8-51, and the front end of the linkage pin 8-4 is located in the second linkage groove 8-51. When the latch lock cylinder seat 6-1 is rotated clockwise by the front handle 4-1, the unlocking drive part 6-12 pushes the upper part of the linkage plate 8-5, so that the linkage plate 8-5 is counterclockwise, and thus the lower part of the linkage plate 8-5 drives the linkage pin 8-4 to move backward through the second linkage groove 8-51, and then the lock tongue 7 moves right and retracts, so that the lock tongue is unlocked at the same time when the latch is unlocked by the front handle 4-1.

[0062] When unlocking the door from the outside (i.e., the rear) using the key through the lock cylinder, the shift block 3-1 first pushes the limit seat 8-2 upward. The shift block 3-1 then shifts the shifting portion 8-13 of the drive seat 8-1 to the right, causing the shifting drive seat 8-1 to move rightward, which in turn causes the lock bolt 7 to retract. Simultaneously, the lock cylinder drive plate 6-4 is driven to the right via the linkage pin 8-4. The shift block 3-1 is then rotated one full circle using the key until it reaches the bottom of the lock cylinder drive plate 6-4. At this point, the shift block 3-1 pushes the lock cylinder drive plate 6-4 upward, causing the lock cylinder drive plate 6-4 to rotate, which in turn causes the second unlocking plate 6-3 to rotate. The second latch bolt driving portion 6-31 of the second unlocking plate 6-3, via the driving portion 5-21 of the latch bolt mounting seat 5-2, causes the latch bolt 5-1 to slide rightward, retracting the latch bolt 5-1 and completing the unlocking process.

[0063] One end of the triangular spring 8-7 is fixedly arranged in the housing assembly 1, and the other end is fixedly arranged on the driving seat 8-1.

[0064] The positioning device 8-8 includes a positioning block 8-81 and an elastic positioning block 8-82. The positioning block 8-81 is fixedly arranged in the housing assembly 1, and the elastic positioning block 8-82 is arranged on the drive seat 8-1 and cooperates with the positioning block 8-81 to keep the drive seat 8-1 in the lock tongue unlocked state or the lock tongue locked state.

[0065] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lock, comprising a housing assembly (1), a panel (2), a lock core (3), a handle assembly (4), a latch bolt assembly (5), a latch bolt drive assembly (6), a lock bolt (7), and a lock bolt drive assembly (8); the housing assembly (1) comprises a front cover and a rear housing (1-1); the front cover is fixedly arranged on the rear housing (1-1) to form a housing having an internal cavity; the lock core (3) is plugged into the housing and fixedly connected to the panel (2); a shift block (3-1) is provided on the lock core (3); the latch bolt assembly (5) comprises a latch bolt (5-1); and the characteristics are: The handle assembly (4) includes a front handle (4-1); the front handle (4-1) is rotatably mounted on the front cover; the latch bolt assembly (5) further includes a latch bolt mounting seat (5-2); the latch bolt (5-1) is fixedly mounted on the latch bolt mounting seat (5-2); the latch bolt mounting seat (5-2) is slidably mounted in the housing assembly (1) in a left-right direction; the latch bolt (5-1) is driven to move by the front handle (4-1) or the lock core (3) via the latch bolt driving assembly (6); the front handle (4-1) drives the lock bolt (7) to move via the latch bolt driving assembly (6); and the lock core (3) drives the lock bolt (7) to move via the lock bolt driving assembly (8).

2. The lock according to claim 1, characterized in that: The oblique bolt drive assembly (6) comprises an oblique bolt lock core seat (6-1), a first unlocking plate (6-2), a second unlocking plate (6-3) and a lock core drive plate (6-4); The oblique bolt lock core seat (6-1) is rotatably arranged in the housing assembly (1); an unlocking drive portion (6-12) is provided at the lower left side of the oblique bolt lock core seat (6-1), and a forward-protruding rotation connection portion (6-13) is provided at the front side of the oblique bolt lock core seat (6-1); The first unlocking plate (6-2) is rotatably arranged on the rotating connection portion (6-13) of the oblique bolt lock cylinder seat (6-1); a first oblique bolt driving portion (6-21) is provided on the upper portion of the first unlocking plate (6-2); the first oblique bolt driving portion (6-21) cooperates with the driving portion (5-21) on the oblique bolt mounting seat (5-2) to drive the oblique bolt mounting seat (5-2) to slide rightward, thereby retracting the oblique bolt (5-1); The second unlocking plate (6-3) is rotatably arranged on the rotating connection portion (6-13) of the oblique bolt lock cylinder seat (6-1) and is located on the front side of the first unlocking plate (6-2); a second oblique bolt driving portion (6-31) is provided on the upper portion of the second unlocking plate (6-3); the second oblique bolt driving portion (6-31) cooperates with the driving portion (5-21) on the oblique bolt mounting seat (5-2) to drive the oblique bolt mounting seat (5-2) to slide rightward, thereby retracting the oblique bolt (5-1); The lock core drive plate (6-4) is hingedly connected to the lower left portion of the second unlocking plate (6-3), and the lock core (3) drives the second unlocking plate (6-3) to rotate clockwise to unlock via the lock core drive plate (6-4).

3. The lock according to claim 2, characterized in that: The handle assembly (4) further comprises a handle reset assembly (4-2), the handle reset assembly (4-2) comprising a reset seat (4-21), a reset drive rod (4-22) and a handle reset spring (4-23); the reset seat (4-21) is fixedly arranged on the rear housing (1-1), the reset drive rod (4-22) is slidably arranged on the reset seat (4-21) in an up-down direction, and the handle reset spring (4-23) is sleeved on the reset drive rod (4-22) and is used to generate a force for driving the reset drive rod (4-22) upward; the reset drive rod (4-22) is hingedly connected to the right side of the oblique bolt lock cylinder seat (6-1).

4. The lock according to claim 1, characterized in that: The oblique tongue (5-1) is detachably fixedly arranged on the oblique tongue mounting seat (5-2) in a mirror-image manner.

5. The lock according to claim 1, characterized in that: The oblique tongue assembly (5) further comprises an oblique tongue return spring (5-3), which is arranged in the housing assembly (1) to cause the oblique tongue mounting seat (5-2) to extend outward.

6. The lock according to claim 1, characterized in that: The oblique bolt drive assembly (6) comprises an oblique bolt lock core seat (6-1); the oblique bolt lock core seat (6-1) is rotatably arranged in the housing assembly (1); an unlocking drive unit (6-12) is provided at the lower left side of the oblique bolt lock core seat (6-1); A lock tongue locking portion (7-1) is provided on the left side of the lock tongue (7), and a linkage groove (7-3) is also provided on the right side of the lock tongue (7); The bolt drive assembly (8) comprises a drive seat (8-1), a linkage seat (8-3), a linkage pin (8-4), a linkage plate (8-5) and a linkage block (8-6); The driving seat (8-1) is arranged in the housing assembly (1) to slide in the left-right direction, and the driving seat (8-1) drives the lock tongue (7) to move left-right; a shifting portion (8-13) that cooperates with the shifting block (3-1) is provided on the lower side of the driving seat (8-1), and the shifting block (3-1) shifts the shifting portion (8-13) to move left-right, thereby driving the lock tongue (7) to extend or retract; The lower portion of the linkage seat (8-3) is rotatably arranged in the housing assembly (1), and the linkage pin (8-4) is fixedly arranged on the upper portion of the linkage seat (8-3) and is located in the linkage groove (7-3); thus, when the linkage seat (8-3) rotates, the locking tongue (7) is driven to move left and right through the linkage pin (8-4); the upper end of the linkage block (8-6) is rotatably arranged in the housing assembly (1), and the upper portion of the linkage plate (8-5) is rotatably connected to the lower end of the linkage block (8-6); the linkage plate (8-5) is provided with a second linkage groove (8-51) The front end of the linkage pin (8-4) is located in the second linkage groove (8-51); when the oblique bolt lock core seat (6-1) is rotated clockwise by the front handle (4-1), the unlocking drive unit (6-12) pushes the upper part of the linkage plate (8-5), causing the linkage plate (8-5) to rotate counterclockwise, and the lower part of the linkage plate (8-5) drives the linkage pin (8-4) to move backward through the second linkage groove (8-51), thereby causing the lock tongue (7) to move rightward and retract, thereby unlocking the oblique bolt and the lock tongue at the same time by the front handle (4-1).

7. The lock according to claim 6, characterized in that: The bolt drive assembly (8) further comprises a limit seat (8-2); a first clamping block (8-12) is provided at the right middle portion of the drive seat (8-1); the limit seat (8-2) is arranged in the housing assembly (1) along an up-down sliding direction, and a clamping hook (8-21) is provided at the upper right end of the limit seat (8-2) and is matched with the first clamping block (8-12); the limit seat (8-2) is driven to move upward by the shifting block (3-1) of the lock core (3), so that the clamping hook (8-21) is disengaged from the first clamping block (8-12).

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