Flat lock

Abstract

The present invention relates to a planar lock. A handle groove is provided on a lock case. One end of a handle is pivotally mounted on the lock case, and the other end of the handle can be buckled into the handle groove. A lock core mounting seat hole is provided on the handle. The lock core includes a lock core sleeve, an inner lock cylinder and a locking member. The lock core sleeve is axially slidably fitted in the lock core mounting seat hole. The lock core has an initial position and an unlocking position in the lock core mounting seat hole along the pressing direction. A return spring for driving the lock core to automatically bounce back to the initial position is correspondingly fitted to the lock core sleeve. A lock core blocking portion is provided in the lock core mounting seat hole. The locking member is locked and unlocked in cooperation with the lock core blocking portion, thereby constituting the locking and unlocking of the lock core in the initial position. The handle is provided with a handle locking assembly for locking and unlocking the handle buckled into the handle groove. An unlocking driving portion that moves axially along with the lock core sleeve is provided on the lock core sleeve. Pressing the lock core to slide from the initial position to the unlocking position and triggering the handle locking assembly through the unlocking driving portion completes the unlocking of the handle. Pressing the lock core to achieve the unlocking action has the advantage of a compact structure.

Description

Technical Field

[0001] The present invention relates to a lock Background Art

[0002] The structure of the existing flat lock is usually as follows: it includes a lock case, a handle groove is provided on the lock case, a handle that can be buckled into the handle groove is provided on the lock case, a lock core is provided on the handle, and the unlocking and locking of the handle are realized by rotating the lock core. The flat lock with the above structure has the following defects: 1. The opening of the handle depends on rotating the lock core, which has the defect of inconvenient use; 2. The unlocking operation depends on rotating the lock core, and there is no mechanical unlocking operation on the inner side of the object to be locked, which limits the use scenarios of the flat lock, and is usually limited to scenarios such as lockers where no internal unlocking operation is required; 3. The waterproof and sealing performance is poor Summary of the Invention

[0003] The object of the present invention: To overcome the defects existing in the prior art, the present invention provides a flat lock that realizes the unlocking action by pressing the lock core, and has the advantage of compact structure

[0004] To achieve the above object, the present invention provides the following technical solutions

[0005] A flat lock, including a lock case, a handle and a lock core. A handle groove is provided on the outer end face of the lock case. One end of the handle is pivotally mounted on the lock case, and the other end of the handle can be buckled into the handle groove. A lock core mounting seat hole for installing the lock core is provided on the buckling end of the handle. The lock core includes a lock core sleeve, an inner lock cylinder that is positioned and rotationally matched in the lock core sleeve, and a locking member that rotates with the inner lock cylinder. The characteristics are as follows: The lock core sleeve is axially slidably matched in the lock core mounting seat hole. The lock core has an initial position and an unlocking position in the lock core mounting seat hole along the pressing direction. The lock core sleeve is correspondingly provided with a return spring that drives the lock core to automatically bounce back to the initial position. A lock core blocking portion is provided in the lock core mounting seat hole. The locking member is locked and unlocked with the lock core blocking portion, so as to constitute the locking and unlocking of the lock core in the initial position. The handle is provided with a handle locking component for locking and unlocking the handle buckled into the handle groove. An unlocking driving portion that moves axially with the lock core sleeve is provided on the lock core sleeve. Pressing the lock core slides from the initial position to the unlocking position and touches the handle locking component through the unlocking driving portion to complete the unlocking of the handle

[0006] By adopting the above technical solutions, after unlocking with the key lock core and then pressing the lock core to finally complete the unlocking operation of the handle, after unlocking with the key lock core, the handle can still be in the locked state. Relying on pressing the lock core to achieve the unlocking of the handle makes the flat lock more convenient to use, and the lock core is installed on the handle as an operating member for unlocking the handle, without the need to separately design a handle unlocking operation component, and the structure is more compact

[0007] Preferably, the handle locking assembly has an in-door unlocking operation end located inside the lock case for releasing the locking of the handle by the handle locking assembly, and the handle automatically pops out of the handle slot through an elastic member. Under this structural design, indoors, operating the in-door unlocking operation end can complete the unlocking action of the handle.

[0008] Preferably, the handle locking assembly includes a locking hook pivotally mounted inside the lock case. A clamping platform is provided at the mounting hole of the lock core. The hook head of the locking hook can hook and disengage from the clamping platform. The locking hook is matched with an elastic driving member, and the elastic driving member provides an elastic locking force to drive the locking hook to swing to a position where the hook head hooks the clamping platform. As the handle is buckled into the handle slot, the clamping platform pushes the locking hook to swing and make way until the handle is completely buckled into the handle slot, and then the hook head of the locking hook swings into the corresponding position of the clamping platform to hook the clamping platform. Pressing the lock core to slide from the initial position to the unlocking position and pushing one end of the hook head of the locking hook through the unlocking driving part can drive the locking hook to swing until the hook head disengages from the clamping platform. Under this structural design, the locking hook and the clamping platform cooperate to lock and unlock the handle. Driven by the elastic driving member, the hook head of the locking hook swings into the position of the clamping platform to automatically lock the handle. Pressing the lock core, the unlocking driving part on the lock core sleeve of the lock core pushes the hook head of the locking hook to drive the locking hook to swing, and the hook head disengages from the clamping platform to complete the unlocking operation, which has the advantages of simple and compact structure.

[0009] Preferably, the locking hook is L-shaped. The locking hook includes a lock hook arm with a hook head and an unlocking arm equipped with the in-unlocking operation end. The connection between the lock hook arm and the unlocking arm is pivotally mounted on the lock case. Under this structural design, it has the advantages of simple structure, reliable and convenient unlocking action.

[0010] Preferably, the mounting hole of the lock core includes a through hole surrounded by a main seat body integrally formed on the handle. A bottom cover covering the bottom port of the through hole is provided on the main seat body. The return spring is a spiral spring supported on the bottom cover. The clamping platform is provided on the bottom cover. An axial limiting end face is provided in the through hole, and a stop step for stop cooperation with the axial limiting end face is provided on the lock core sleeve. Under this structural design, it has the advantages of convenient processing and convenient installation of the lock core.

[0011] Preferably, the lock core blocking part is a stop protrusion provided at the bottom of the lock core installation hole. The locking member is provided with a stop part for stop cooperation with the stop protrusion and an avoidance part for avoiding the stop protrusion along the rotation direction. Under this structural design, rotating the inner lock cylinder makes the stop part of the locking member correspond to the position of the stop protrusion. After being stopped by the stop protrusion, the lock core cannot be pressed to complete the locking of the lock core. After inserting a matching key and rotating the inner lock cylinder, the locking member rotates to make the avoidance part correspond to the position of the stop protrusion, and the lock core can be pressed to complete the unlocking operation of the handle, which has the advantages of simple and compact structure and reliable operation.

[0012] Preferably, a pivot ear is provided on the handle, a linkage rotating shaft is rotatably fitted on the lock case, the pivot ear is sleeved on the linkage rotating shaft and is linked and connected to the linkage rotating shaft, and the linkage rotating shaft is connected with a transmission member. Under this structural design, the rotation of the handle directly drives the transmission member through the linkage rotating shaft to open the door lock, which has the advantage of simple operation.

[0013] Preferably, the handle groove includes a main groove body facing the notch of the handle groove, and an inner cavity offset from the notch. An annular sealing gasket is provided on the lock case at the edge of the notch of the handle groove. The handle includes a handle panel that covers the notch of the handle groove when the handle is inserted into the handle groove. The handle panel is in sealing cooperation with the annular sealing gasket. The pivot ear is provided at the bottom of the handle panel and extends into the inner cavity. The orifice of the lock core mounting seat hole is covered with a rubber end cap for sealingly covering and opening the orifice of the lock core mounting seat hole. An annular groove is provided around the orifice of the lock core mounting seat hole. The rubber end cap includes a cover plate covering the orifice of the lock core mounting seat hole. A raised annular sealing convex edge is provided on the bottom surface of the cover plate and is inserted into the annular groove. The annular sealing convex edge is in contact sealing cooperation with the annular groove wall. The rubber end cap can be elastically deformed to press the cover plate of the rubber end cap to press the lock core. Under this structural design, after the handle is inserted into the handle groove, the handle panel seals and covers the notch of the handle groove, and the position of the lock core on the handle is shielded and sealed by the rubber end cap, so as to prevent water and dust from contacting the lock case and the handle, and the rest of the components are almost isolated from the outside. Therefore, the waterproof, dustproof, salt spray and other performances are more prominent. And when the lock core is in the locked state, directly pressing the rubber end cap can complete the unlocking action.

[0014] Preferably, a connection hole is provided at the bottom of the annular groove, and a connection post inserted into the connection hole is provided on the annular sealing convex edge. An anti - detachment barb for preventing the connection post from disengaging from the connection hole is provided on the connection post. Under this structural design, the installation and use of the rubber end cap are more convenient.

[0015] The present invention will be further described below with reference to the accompanying drawings. Description of the Drawings

[0016] Figure 1 is a perspective view of the handle of the flat - surface lock in the locked state according to a specific embodiment of the present invention;

[0017] Figure 2 is a structural schematic diagram of the handle of the flat - surface lock in the locked state according to a specific embodiment of the present invention;

[0018] Figure 3 is a perspective view of the handle of the flat - surface lock in the opened state according to a specific embodiment of the present invention;

[0019] Figure 4 is a structural schematic diagram of the handle of the flat - surface lock in the opened state according to a specific embodiment of the present invention;

[0020] Figure 5Explosion view of the handle in the specific embodiment of the present invention. Specific embodiments

[0021] See the appendix Figures 1 to 5 As shown in the figure, a planar lock disclosed by the present invention includes a lock case 1, a handle 2 and a lock core 3. A handle groove 11 is provided on the outer end face of the lock case 1. One end of the handle 2 is pivotally mounted on the lock case 1, and the other end of the handle 2 can be buckled into the handle groove 11. A lock core mounting seat hole 21 for mounting the lock core 3 is provided on the buckling end of the handle 2. The lock core 3 includes a lock core sleeve 31, an inner lock cylinder 32 which is positioned and rotationally fitted in the lock core sleeve 31, and a locking member 33 which rotates with the inner lock cylinder 32. The lock core sleeve 31 is axially slidably fitted in the lock core mounting seat hole 21. The lock core 3 has an initial position and an unlocking position in the lock core mounting seat hole 21 along the pressing direction. The lock core sleeve 31 is correspondingly fitted with a return spring 4 for driving the lock core 3 to automatically bounce back to the initial position. A lock core blocking portion 51 is provided in the lock core mounting seat hole 21. The locking member 33 is locked and unlocked with the lock core blocking portion 51, so as to constitute the locking and unlocking of the lock core 3 in the initial position. The handle 2 is fitted with a handle locking assembly for locking and unlocking the handle 2 buckled into the handle groove 11. An unlocking driving portion 311 which moves axially with the lock core sleeve 31 is provided on the lock core sleeve 31. Pressing the lock core 3 to slide from the initial position to the unlocking position and touching the handle locking assembly through the unlocking driving portion 311 completes the unlocking of the handle 2. When performing the handle unlocking operation, it is necessary to unlock the lock core 3 in advance. After inserting the matching key and rotating the inner lock cylinder 32, the locking member 33 is unlocked from the lock core blocking portion 51. The lock core 3 in the initial position can be pressed. Pressing the lock core 3 makes the lock core 3 enter the unlocking position, and the unlocking driving portion 311 on the lock core sleeve 31 touches the handle locking assembly to release the locking of the handle. After the key lock core is unlocked, the handle can still be in the locked state, and the handle is unlocked by pressing the lock core, making the planar lock more convenient to use. Moreover, the lock core is installed on the handle as an operating member for unlocking the handle, and there is no need to separately design a handle unlocking operation component, so the structure is more compact. Among them, the handle 2 automatically bounces out of the handle groove 11 through an elastic member 2-1. In this specific embodiment, the elastic member 2-1 is a torsion spring, and the structure is compact.

[0022] Based on the above design, the unlocking operation inside the door can be realized. The handle locking assembly has an inside-the-door unlocking operation end 6 located inside the lock case 1 for releasing the locking of the handle locking assembly on the handle 2. Inside the room, operating the inside-the-door unlocking operation end can complete the unlocking action of the handle.

[0023] In this specific embodiment, the handle locking assembly includes a locking hook 7 pivotally mounted inside the lock case 1. A clamping platform 52 is provided at the lock core mounting seat hole 21. The hook head 71 of the locking hook 7 can hook (as shown in Figure 1 and Figure 2 shown) and disengage from the clamping platform 52 (as shown in Figure 3 and Figure 4As shown in the figure, the locking hook 7 is provided with an elastic driving member 7-1. The elastic driving member 7-1 preferably adopts a torsion spring design for easy installation and arrangement. Of course, as known to those skilled in the art, the elastic driving member can also be a tension spring, a compression spring, etc. The elastic driving member 7-1 provides an elastic locking force to drive the locking hook 7 to swing to the position where the hook head 71 hooks the clamping platform 52. Then, without external driving, the elastic driving member 7-1 can drive the locking hook 7 to stay at the position where the hook head 71 swings into the corresponding position of the clamping platform 52. The limitation of the corresponding position where the locking hook 7 enters under the drive of the elastic driving member 7-1 is realized by the limiting structure. As the handle 2 is inserted into the handle groove 11, the clamping platform 52 pushes the locking hook 7 to swing and make way until the handle 2 is completely inserted into the handle groove 11. Then, the hook head 71 of the locking hook 7 swings into the corresponding position of the clamping platform 52 to hook the clamping platform 52. Press the lock core 3 to slide from the initial position to the unlocking position and push one end of the hook head 71 of the locking hook 7 through the unlocking driving part 311, so as to drive the locking hook 7 to swing until the hook head 71 disengages from the clamping platform 52. The cooperation between the locking hook and the clamping platform realizes the locking and unlocking of the handle. Driven by the elastic driving member, the hook head of the locking hook swings into the position of the clamping platform to automatically lock the handle. Press the lock core, and the unlocking driving part on the lock core sleeve of the lock core pushes the hook head of the locking hook to drive the locking hook to swing, and the hook head disengages from the clamping platform to complete the unlocking operation. It has the advantages of simple and compact structure. A driving and pushing inclined surface 711 is provided at the top of the hook head 71 of the locking hook 7, and this pushing inclined surface 711 is for the pushing of the unlocking driving part 311 and the clamping platform 52. Among them, the unlocking driving part 311 adopts the design of a side convex block with an inclined surface adapted to the pushing inclined surface 711, and the clamping platform 52 also has an inclined surface. Of course, as a feasible solution of the present invention, the handle locking assembly can also adopt a swing piece that swings horizontally and cooperates with an elastic driving member, or a sliding piece that slides horizontally and cooperates with an elastic driving member, or a design of arranging a clamping hole in the lock shell and a locking and unlocking component that slides and expands at the installation seat hole of the lock core, etc.; but they have the defects of inconvenient structural arrangement, non-compact structure and unreliable operation.

[0024] Under the design with the internal unlocking function, that is, the design with the internal unlocking operation end, further, the locking hook 7 is L-shaped. The locking hook 7 includes a locking hook arm 72 with a hook head 71 and an unlocking arm 73 equipped with the internal unlocking operation end 6. The connection between the locking hook arm 72 and the unlocking arm 73 is pivotally mounted on the lock case 1. Pressing the unlocking arm can achieve the unlocking action on the inner side of the door, which has the advantages of simple structure and convenient installation and layout. In this specific embodiment, for the position limitation of the swinging of the locking hook 7 driven by the elastic driving member 7-1, a protruding blocking edge 731 on the unlocking arm 73 is adopted. There is a button hole on the lock case 1 for the internal unlocking operation end 6 on the unlocking arm 73 to be exposed. The blocking edge 731 blocks against the edge of the button hole, so as to realize the position limitation of the swinging of the locking hook driven by the elastic driving member; of course, those skilled in the art can also adopt other forms for the limit structure of the swinging position of the component according to the prior art, such as designing an angle limit structure at the pivot mounting position of the locking hook; or directly blocking the protrusion of the locking hook arm, etc.

[0025] In this specific embodiment, the lock core blocking part 51 is a stop protrusion provided at the bottom of the lock core mounting hole 11. The locking member 33 is provided with a stop part 331 that is in stop cooperation with the stop protrusion along the rotation direction, and an avoidance part 332 that avoids the stop protrusion. Rotate the inner lock cylinder so that the stop part of the locking member corresponds to the position of the stop protrusion. After being stopped by the stop protrusion, the lock core cannot be pressed, and the lock core is locked. After inserting the matching key and rotating the inner lock cylinder, the locking member rotates to the position where the avoidance part corresponds to the stop protrusion, and the lock core can be pressed to complete the unlocking operation of the handle, which has the advantages of simple and compact structure and reliable operation. Of course, the lock core blocking part can also be a bayonet, and the locking member can be a sheet body. As the inner lock cylinder rotates, the locking member is inserted into and withdrawn from the bayonet to realize the unlocking and locking operations of the lock core; it can also be that the locking member is a cam, and a blocking protrusion protrudes above the low position surface of the cam, and the lock core blocking part is a telescopic lock rod, etc.; but under the design of this specific embodiment, the structure is simple and the work is reliable. To ensure the reliability of the work, there are a pair of oppositely arranged stop protrusions in the lock core mounting seat hole 21. The stop protrusions are integrally connected by a convex block to form an annular protrusion, and a special-shaped concave hole surrounded by the annular protrusion is formed at the bottom of the lock core mounting seat hole. In this way, the annular protrusion can be used for the positioning of the return spring at the same time.

[0026] In this specific embodiment, the handle 2 is provided with a pivot ear 22. A linkage rotating shaft 8 is rotatably fitted on the lock case 1. The pivot ear 22 is sleeved on the linkage rotating shaft 8 and is linked with the linkage rotating shaft 8. The linkage rotating shaft 8 is connected with a transmission member 9. Rotating the handle directly drives the transmission member through the linkage rotating shaft to achieve the opening of the door lock, which has the advantage of simple operation. The transmission member includes a lever with a fork-shaped end, and the two fork arms of the lever are fixedly connected with the linkage rotating shaft on the relative side. Of course, there are also many other forms of the driving structure mode for unlocking the handle in the lock, such as sliding and pushing, etc.

[0027] To improve the sealing performance of the lock, the handle groove 11 includes a main groove body 111 facing the notch a of the handle groove 11, and an inner cavity 112 offset from the notch a. An annular sealing gasket 13 is provided on the lock shell 1 at the edge of the notch a of the handle groove 11. The handle 2 includes a handle panel 23 that covers the notch a of the handle groove 11 when the handle 2 is inserted into the handle groove 11. The handle panel 23 is in sealing cooperation with the annular sealing gasket 13. The pivot ear 22 is provided at the bottom of the handle panel 23, and the pivot ear 22 extends into the inner cavity 112. The orifice of the lock core mounting hole 21 is covered with a rubber end cap 2-2 for sealingly covering and opening the orifice of the lock core mounting hole 21. An annular groove 24 is provided around the orifice of the lock core mounting hole 21. The rubber end cap 2-2 includes a cover plate 2-21 that covers the orifice of the lock core mounting hole 21. A raised annular sealing rib 2-22 that inserts into the annular groove 24 is provided on the bottom surface of the cover plate 2-21. The annular sealing rib 2-22 is in contact sealing cooperation with the wall of the annular groove 24. The rubber end cap 2-2 can be elastically deformed to press the cover plate of the rubber end cap 2-2 to press the lock core. After the handle is inserted into the handle groove, the handle panel seals the notch of the handle groove. The position of the lock core on the handle is shielded and sealed by the rubber end cap, so that the lock shell and the handle are in contact with water and dust, and the rest of the components are almost in a state of being isolated from the outside. Therefore, the waterproof, dustproof, and salt spray resistance performances are more prominent. And when the lock core is in the locked state, by using the rubber elastic deformation ability of the rubber end cap, the lock core can be pressed directly by pressing the rubber end cap to complete the unlocking action. An annular sealing groove is also provided on the inner wall of the annular groove, and an annular sealing rib that is sealingly fitted in the annular sealing groove is provided on the annular sealing rib, making the sealing of the rubber end cap more reliable.

[0028] To ensure that the rubber end cap remains on the handle when it is opened, a connection hole 241 is provided at the bottom of the annular groove 24. A connection post 2-23 that inserts into the connection hole 241 is raised on the annular sealing rib 2-22. An anti-detachment barb 2-231 for preventing the connection post 2-23 from disengaging from the connection hole 241 is provided on the connection post 2-23. The installation and use of the rubber end cap are more convenient. Of course, the anti-detachment structure of the rubber end cap can also be screw fixation, or an elastic ring, etc.

[0029] In this specific embodiment, the lock core mounting hole 21 includes a through hole surrounded by a main seat body 211 integrally formed on the handle 2. A bottom cover 5 that covers the bottom port of the through hole is provided on the main seat body 211. The return spring 4 is a spiral spring supported on the bottom cover 5. A clamping platform 52 is provided on the bottom cover 5. An axial limiting end face 2111 is provided in the through hole. A stop step 312 that is in stop cooperation with the axial limiting end face 2111 is provided on the lock core sleeve 31. It has the advantages of convenient processing and convenient installation of the lock core. Among them, a stop projection is also provided on the bottom cover. The bottom cover is fixed to the handle by screws.

[0030] For the flat lock of the present invention, after the key lock cylinder is unlocked, the lock cylinder 3 can be pressed and the inner unlocking operation end 6 can be pressed to achieve indoor and outdoor unlocking operations. In this way, unlocking can also be achieved by directly pressing the rubber end cover 2-2. When anti-theft locking is required, key operation is needed, which has the advantage of convenient use; after the handle is buckled into the handle groove, only the end face of the lock shell and the handle panel are exposed, and the outdoor dustproof and waterproof performance of the lock is good, which improves the service life of the lock.

Claims

1. A planar lock, comprising a lock case, a handle and a lock core. A handle groove is provided on the outer end face of the lock case. One end of the handle is pivotally mounted on the lock case, and the other end of the handle can be inserted into the handle groove. A lock core mounting seat hole for installing the lock core is provided on the inserted end of the handle. The lock core includes a lock core sleeve, an inner lock cylinder that is positioned and rotatably fitted in the lock core sleeve, and a locking member that rotates with the inner lock cylinder. It is characterized in that: The described lock core sleeve is axially slidably fitted in the lock core mounting seat hole. The lock core has an initial position and an unlocking position in the lock core mounting seat hole along the pressing direction. The lock core sleeve is correspondingly fitted with a return spring for driving the lock core to automatically bounce back to the initial position. A lock core blocking portion is provided in the lock core mounting seat hole. The locking member is locked and unlocked with the lock core blocking portion, thereby constituting the locking and unlocking of the lock core in the initial position. The handle is fitted with a handle locking assembly for locking and unlocking the handle buckled into the handle groove. An unlocking driving portion that moves axially with the lock core sleeve is provided on the lock core sleeve. Pressing the lock core to slide from the initial position to the unlocking position and touching the handle locking assembly through the unlocking driving portion completes the unlocking of the handle; the handle locking assembly has an in-door unlocking operation end located inside the lock case for releasing the locking of the handle by the handle locking assembly. The handle automatically bounces out of the handle groove through an elastic member. The handle locking assembly includes a locking hook pivotally mounted in the lock case. A clamping table is provided at the lock core mounting seat hole. The hook head of the locking hook can hook and disengage from the clamping table. The locking hook is fitted with an elastic driving member. The elastic driving member provides an elastic locking force for driving the locking hook to swing to a position where the hook head hooks the clamping table. As the handle is buckled into the handle groove, the clamping table pushes the locking hook to swing and make way until the handle is completely buckled into the handle groove. Then, the hook head of the locking hook swings into the corresponding position of the clamping table to hook the clamping table. Pressing the lock core to slide from the initial position to the unlocking position and pushing one end of the hook head of the locking hook through the unlocking driving portion realizes driving the locking hook to swing until the hook head disengages from the clamping table.

2. The planar lock according to claim 1, characterized in that: The described locking hook is L-shaped. The locking hook includes a lock hook arm with a hook head and an unlocking arm equipped with the in-unlocking operation end. The connection between the lock hook arm and the unlocking arm is pivotally mounted on the lock case.

3. The planar lock according to claim 1, wherein: The lock core mounting seat hole includes a through hole surrounded by a main seat body integrally formed on the handle. A bottom cover covering the bottom port of the through hole is provided on the main seat body. The return spring is a spiral spring supported on the bottom cover. The clamping table is provided on the bottom cover. An axially limiting end face is provided in the through hole. A stop step for stop cooperation with the axially limiting end face is provided on the lock core sleeve.

4. The planar lock according to claim 1 or 2 or 3, characterized in that: The lock core blocking portion is a stop protrusion provided at the bottom of the lock core mounting hole. The locking member is arranged along the rotation direction with a stop portion for stop cooperation with the stop protrusion and an avoidance portion for avoiding the stop protrusion.

5. The flat lock according to claim 1 or 2 or 3, characterized in that: A pivot ear is provided on the handle. A linkage rotating shaft is rotatably fitted on the lock case. The pivot ear is sleeved on the linkage rotating shaft and is linked and connected with the linkage rotating shaft. The linkage rotating shaft is connected with a transmission member.

6. The planar lock according to claim 5, wherein: The handle slot includes a main slot body facing the notch of the handle slot and an inner cavity offset from the notch. An annular sealing gasket is provided on the lock housing at the edge of the notch of the handle slot. The handle includes a handle panel that covers the notch of the handle slot when the handle is inserted into the handle slot. The handle panel is in sealing cooperation with the annular sealing gasket. The pivot ear is provided at the bottom of the handle panel, and the pivot ear extends into the inner cavity. The orifice of the lock core mounting seat hole is covered with a rubber end cap for sealingly covering and opening the orifice of the lock core mounting seat hole. An annular groove is formed around the orifice of the lock core mounting seat hole. The rubber end cap includes a cover plate that covers the orifice of the lock core mounting seat hole. An annular sealing convex edge protruding from the bottom surface of the cover plate is inserted into the annular groove, and the annular sealing convex edge is in contact and sealing cooperation with the annular groove wall. The rubber end cap can be elastically deformed to press the cover plate of the rubber end cap to press the lock core.

7. The flat lock according to claim 6, characterized in that: A connection hole is provided at the bottom of the annular groove. A connection post protruding from the annular sealing convex edge is inserted into the connection hole, and an anti - detachment barb for preventing the connection post from disengaging from the connection hole is provided on the connection post.

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