Improved lock with anti-locking structure

Abstract

This invention discloses an improved deadbolt lock, comprising a first fixed component with a first handle and a bolt. The first handle drives the bolt to unlock via a lock bar. The first handle includes a handle base with a movably mounted button, and a locking pin movably mounted on the side of the button facing the lock bar. The first fixed component has a lock hole, the lock bar has a through hole, and the handle base has a clearance hole. The handle base and the button are engaged by a clutch mechanism. The first handle has a deadbolt state and a normal state. The handle base and the lock bar have a transmission connection with a play-fit. In the deadbolt state, pressing the button fixes the lock bar and the first fixed component relative to each other with the locking pin. In the normal state, the handle base rotates a first preset angle to eliminate the play-fit and release the deadbolt. The handle base continues to rotate a second preset angle, causing the lock bar to rotate. The locking and unlocking processes of this invention are achieved through the seamless rotation of the first handle, making operation smooth, simple, and easy to use.

Description

Technical Field

[0001] This invention relates to the field of lock technology, and more specifically to a lock with an improved deadbolt structure. Background Technology

[0002] Most locks have a deadbolt function, which is achieved by a knob separate from the handle. Users rotate the knob individually to lock and unlock the lock.

[0003] However, unlocking existing locks requires two steps after deadbolting: first, rotating the knob to unlock, and second, rotating the handle to unlock, making the overall operation less than smooth. Furthermore, since the knob and handle are independently designed, the design needs to consider the issue of interference during use. Summary of the Invention

[0004] The purpose of this invention is to provide a lock with an improved deadbolt structure that allows for smooth unlocking and opening processes after deadbolt locking.

[0005] The objective of this invention is achieved as follows.

[0006] An improved deadbolt lock includes a first fixed assembly for mounting a first handle and a bolt. The first handle, via a lock bar, drives the bolt to unlock. The first handle includes a handle base with a movably mounted button. A first retaining device and a second retaining device are provided between the handle base and the button. A locking pin is movably mounted on the button facing the lock bar. The first fixed assembly has a lock hole. The lock bar has a through hole for the locking pin to pass through. The handle base has a clearance hole for the locking pin to pass through. The handle base and the button are engaged by a clutch mechanism. The first handle has a deadbolt state and a normal state. The handle base and the lock bar have a transmission connection with a play-fitting engagement. In the deadbolt position, pressing the button causes the locking pin to pass through the keyhole and through hole. The first retaining device holds the locking pin in place, fixing the lock bar and the first fixing assembly relative to each other. The clutch mechanism between the handle base and the button engages. In normal operation, the handle seat rotates to the first preset angle to eliminate any misalignment between the handle seat and the lock bar. The handle seat then uses a clutch mechanism to disengage the lock pin from the lock hole or through hole to release the deadbolt. The second retaining device holds the lock pin in place, disengaging the clutch mechanism. The handle seat continues to rotate to the second preset angle, causing the lock bar to rotate.

[0007] After the lock of the present invention is deadbolted, both the unlocking and unlocking processes are achieved by rotating the first handle. The deadbolting and unlocking processes are seamlessly connected, making the operation smooth, simple, and easy to use.

[0008] Furthermore, the clutch structure includes a first clutch tooth and a second clutch tooth disposed between the handle seat and the button. In the locked state, the button pushes the second clutch tooth closer to and engages with the first clutch tooth. In the normal state, the rotation of the handle seat causes the first clutch tooth to rotate, and the first clutch tooth forces the second clutch tooth to push the locking pin and the button to move away from the first clutch tooth to disengage the holding force of the first holding device.

[0009] The clutch mechanism is reasonably designed, making it easy for the first handle to switch from rotational motion to linear motion, thereby pushing the lock pin to move and unlock.

[0010] Furthermore, a locking block is provided on the side of the button facing the first clutch tooth, and the locking block is provided with the locking pin. A mounting groove is provided on the side of the handle seat away from the lock tongue. The button is limited and movable in the mounting groove. The locking block is movable between the bottom surface of the mounting groove and the inner side of the button. The bottom surface of the mounting groove is provided with the first clutch tooth, and the locking block is provided with the second clutch tooth.

[0011] The first and second clutch teeth are easy to mate and simple to manufacture.

[0012] Furthermore, the top of the first clutch tooth protrudes from the bottom surface of the mounting groove, and the top of the second clutch tooth is flush with the mating surface of the anti-locking block facing the handle seat.

[0013] The first and second clutch teeth require little space to engage, and do not increase the volume of the first handle.

[0014] Furthermore, both the first and second clutch teeth have a cutting surface at their top, the cutting surface of the second clutch tooth is flush with the mating surface, and the tooth groove of the second clutch tooth is recessed into the mating surface.

[0015] The first and second clutch teeth are not prone to damage or malfunction.

[0016] Furthermore, the axes of the first clutch tooth and the second clutch tooth are on the rotation axis of the handle seat. The handle seat has a first groove at the center of the first clutch tooth, and the anti-locking block has a second groove at the center of the second clutch tooth. The second retaining device is accommodated between the first groove and the second groove.

[0017] The second retaining device is easy to install and can stably separate the first and second clutch teeth, making the unlocking operation less strenuous.

[0018] Furthermore, the first groove has a positioning hole at its center, and the second groove has a positioning post at its center. The positioning post passes through the positioning hole and moves within the positioning hole as the anti-locking block moves. The second retaining device is a spring, which is sleeved on the positioning post.

[0019] The positioning hole and positioning post work together to guide the first clutch tooth and the second clutch tooth to approach or separate, avoiding misalignment of the first clutch tooth and the second clutch tooth that could lead to malfunction.

[0020] Furthermore, the mounting groove is provided with the clearance hole around the first clutch tooth, and the clearance hole is an arc-shaped hole about the rotation axis of the handle seat.

[0021] The arc-shaped hole avoids the position of the locking pin.

[0022] Furthermore, the first retaining device includes a magnet and a magnetic part. The magnet is located on the handle base, and the magnetic part is located on the button. When the button is pressed, the magnetic part approaches the magnet, and the magnetic attraction between the magnetic part and the magnet is greater than the elastic force of the second retaining device.

[0023] The first retaining device is simple and reasonable, avoiding the second retaining device from pushing the locking pin to move, which would cause the deadbolt to fail.

[0024] Furthermore, the lock bar has a synchronously rotating lock plate on one side of the first handle, and the lock plate has the through hole, the axis of the through hole being non-axial with the axis of rotation of the lock bar.

[0025] It facilitates the alignment and positioning of the locking pin and through hole.

[0026] Furthermore, a connecting piece is provided between the lock plate and the handle seat. After the handle seat and the connecting piece are connected by transmission, they rotate synchronously. The lock plate has an arc-shaped elongated hole around the rotation axis of the lock bar. The connecting piece has a pin hole corresponding to the arc-shaped elongated hole. A fixing pin is provided in the pin hole, which passes through the arc-shaped elongated hole. The handle seat drives the fixing pin to move in the arc-shaped elongated hole through the connecting piece until it abuts against the end of the arc-shaped elongated hole to form the aforementioned loose fit. After the fixing pin abuts against the end of the arc-shaped elongated hole, the handle seat rotates, causing the lock bar to rotate.

[0027] The design of the play-fit between the handle base and the lock plate allows the locking and unlocking to be completed sequentially, making the overall mechanism run more smoothly and less prone to failure.

[0028] Furthermore, the first fixing component includes a first panel and a fixing piece that are connected and fixed to each other. The first panel is placed between the fixing piece and the first handle, and the locking piece is placed between the first panel and the fixing piece. The fixing piece is provided with a reset device for aligning the through hole of the locking piece with the lock hole. The first panel is provided with the lock hole, and the locking pin passes through the through hole and is inserted into the lock hole. Alternatively, the fixing piece has the lock hole, the first panel has an arc-shaped elongated hole, and the locking pin passes through the arc-shaped elongated hole and the through hole and is inserted into the lock hole.

[0029] The keyhole is designed reasonably and works with the locking pin to achieve the deadbolt function.

[0030] The beneficial effects of this invention are as follows: In this invention, when the button is pressed down, the first clutch tooth and the second clutch tooth, the locking pin pass through the lock hole and the through hole, so that the first fixing component and the locking bar are relatively fixed, and the locking bar cannot be rotated to achieve the anti-locking function.

[0031] This invention involves rotating the handle base, causing the second clutch tooth to force the first clutch tooth away from the second clutch tooth, which in turn causes the button to drive the lock pin to disengage from the lock hole or through hole. The handle base continues to drive the lock bar to rotate and unlock. The locking and unlocking processes are seamlessly connected, making the operation smooth, simple, and easy to use. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0033] Figure 2 This is a structural schematic diagram of Embodiment 1 (from another perspective).

[0034] Figure 3 This is a schematic diagram of the exploded structure of Example 1.

[0035] Figure 4 This is a schematic diagram of the exploded structure of Example 1 (from another perspective).

[0036] Figure 5 This is a schematic diagram of the handle base in Embodiment 1.

[0037] Figure 6 This is a schematic diagram of the anti-locking block in Example 1.

[0038] Figure 7 This is a cross-sectional structural diagram of Example 1 (normal state).

[0039] Figure 8 This is a cross-sectional structural diagram of Example 1 (locked state). Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Example 1, see Figure 1-8 As shown, a lock with an improved deadbolt structure includes a first handle 1, a first fixing component 2, a bolt 3, a locking bar 4, a reset device 5, a second handle 6, and a second panel 7. The first handle 1 includes a handle base 8, a deadbolt block 9, a button 11, a first retaining device 13, a second retaining device 14, and a locking pin 15. The first fixing component 2 includes a first panel 21 and a fixing piece 22 that are connected and fixed to each other.

[0042] The latch 3 is positioned between the first panel 21 and the second panel 7, which are fixed together by screws. The middle of the locking bar 4 passes through the latch 3, and the locking bar 4 and latch 3 are in a driving engagement. One end of the locking bar 4 passes through the first panel 21 and is connected to the handle seat 8 via a loose engagement, while the other end passes through the second panel 7 and is connected to the second handle 6. A locking plate 41 is located on the side of the locking bar 4 closest to the first panel 21. The locking plate 41 has two symmetrical through holes 42, the axes of which are not aligned with the rotation axis of the locking bar 4. The locking bar 4 and the synchronously rotating locking plate 41 rotate synchronously. The first panel 21 has a locking hole 20 corresponding to the through holes 42.

[0043] A connecting piece 10 is provided between the lock plate 41 and the handle seat 8. After the handle seat 8 and the connecting piece 10 are connected by a transmission, they rotate synchronously. The lock plate 41 has an arc-shaped elongated hole 43 around the rotation axis of the lock bar 4. The connecting piece 10 has a pin hole 100 corresponding to the arc-shaped elongated hole 43. A fixing pin is provided in the pin hole 100, which passes through the arc-shaped elongated hole 43. The handle seat 8 drives the fixing pin to move within the arc-shaped elongated hole 43 through the connecting piece 10 until it abuts against the end of the arc-shaped elongated hole 43, forming the aforementioned loose fit. After the fixing pin abuts against the end of the arc-shaped elongated hole 43, the handle seat 8 rotates, causing the lock bar 4 to rotate. Preferably, the lock bar 4 and the lock plate 41 are integrally formed. The lock tongue 3 is prior art and will not be described in detail in this invention.

[0044] A fixing plate 22 is placed between the first panel 21 and the latch 3, and the fixing plate 22 and the first panel 21 are connected and fixed by screws. A locking plate 41 is placed between the fixing plate 22 and the first panel 21. The fixing plate 22 is provided with a reset device 5 for aligning the through hole 42 of the locking plate 41 with the lock hole 20. Specifically, the reset device 5 includes a rotating plate 51 and a torsion spring 52. The rotating plate 51 is rotatably mounted on the fixing plate 22 and on one side of the locking plate 41. The rotating plate 51 and the locking plate 41 are engaged. One end of the torsion spring 52 abuts against the fixing plate 22, and the other end abuts against the rotating plate 51. The torque of the torsion spring 52 aligns the through hole 42 of the locking plate 41 with the lock hole 20. Preferably, the torsion spring 52 has three ends, two of which are symmetrical and abut against the fixing plate 22, and the remaining end abuts against the rotating plate 51. The locking bar 4 can drive the locking plate 41 to rotate clockwise or counterclockwise to achieve stable reset. Preferably, the fixing piece 22 also has a locking hole 20 corresponding to the through hole 42.

[0045] The handle base 8 and the button 11 are engaged by a clutch mechanism. Specifically, the handle base 8 has a mounting groove 81 on the side away from the latch 3. The button 11 is movably positioned within the mounting groove 81, and the deadbolt 9 is movably positioned between the bottom surface of the mounting groove 81 and the inner side surface of the button 11. The bottom surface of the mounting groove 81 has a first clutch tooth 82, the top of the teeth of the first clutch tooth 82 protruding from the bottom surface of the mounting groove 81. The first clutch tooth 82 is arranged in a ring around the rotation axis of the handle base 8, and the axis of the first clutch tooth 82 is on the rotation axis of the handle base 8. The handle base 8 has a first groove 83 at the center of the first clutch tooth 82, and a positioning hole 84 at the center of the first groove 83. The mounting groove 81 has two clearance holes 85 around the first clutch tooth 82, and the clearance holes 85 are arc-shaped holes around the rotation axis of the handle base 8.

[0046] The locking block 9 has a mating surface 90 facing the latch 3. This mating surface 90 has a second clutch tooth 91, the top of which is flush with the mating surface 90 facing the handle seat 8. Both the first clutch tooth 82 and the second clutch tooth 91 have a cutting surface 92 at their tops. The cutting surface 92 of the second clutch tooth 91 is flush with the mating surface 90, and the groove of the second clutch tooth 91 is recessed into the mating surface 90. The first clutch tooth 82 and the second clutch tooth 91 engage to form the clutch mechanism.

[0047] The axis of the second clutch tooth 91 is on the rotation axis of the handle seat 8. The anti-locking block 9 has a second groove 93 at the center of the second clutch tooth 91, and a positioning pin 94 at the center of the second groove 93, which passes through the positioning hole 84. The positioning pin 94 moves within the positioning hole 84 as the anti-locking block 9 moves. The first groove 83 and the second groove 93 are opposite to each other and accommodate the second retaining device 14. The second retaining device 14 is a spring, which is sleeved on the positioning pin 94. One end of the spring abuts against the first groove 83, and the other end of the spring abuts against the second groove 93. The second retaining device 14 prevents the anti-locking block 9 and the button 11 from moving on their own, thus preventing the locking pin 15 from moving and resulting in self-locking.

[0048] One end of the locking pin 15 is threaded and fixed to the mating surface 90 of the anti-locking block 9, and the other end of the locking pin 15 passes through the relief hole 85 and the locking hole 20 and approaches the through hole 42. The second retaining device 14 has a tendency to disengage the locking pin 15 from the through hole 42. The locking pin 15 is made of metal and is not easily broken.

[0049] The first retaining device 13 includes a magnet 131 and a magnetic part 132. The magnet 131 is disposed on the handle base 8, and the magnetic part 132 is disposed on the button 11. When the button 11 is pressed, the magnetic part 132 approaches the magnet 131, and the magnetic attraction between the magnetic part 132 and the magnet 131 is greater than the elastic force of the second retaining device 14. Preferably, the magnetic part 132 is an iron piece fixed on the button 11.

[0050] Working principle: When the lock is in its normal state, both the first handle 1 and the second handle 6 can drive the bolt 3 to lock or unlock via the lock bar 4. However, the second handle 6 directly drives the lock bar 4 to rotate, but the second handle 6 needs to rotate to eliminate any play before it can drive the lock bar 4. For example, rotating the second handle 6 15 degrees will complete the unlocking action, but after rotating the second handle 6 15 degrees to eliminate any play, it needs to rotate another 15 degrees to complete the unlocking action.

[0051] In the deadbolt state, pressing button 11 pushes the second clutch tooth 91 of the deadbolt block 9 towards the first clutch tooth 82, compressing the second retaining device 14. Magnet 131 and magnetic part 132 abut against each other, increasing the magnetic attraction and overcoming the elasticity of the second retaining device 14. The deadbolt block 9 pushes the locking pin 15 towards the bolt 3. The locking pin 15 passes through the through hole 42, and the first clutch tooth 82 and second clutch tooth 91 approach and engage. At this time, the locking pin 15 simultaneously passes through the lock hole 20 of the first panel 21 and the through hole 42 of the lock plate 41. The lock plate 41 is restricted by the locking pin 15 and cannot move, preventing the second handle 6 from rotating the lock bar 4, thus achieving the deadbolt function. During this process, if the travel of the locking pin 15 is sufficient, the locking pin 15 can also be inserted into the lock hole 20 of the fixing plate 22, further improving the deadbolt protection effect. Alternatively, the lock hole 20 of the fixing plate 22 can serve as a clearance hole to prevent the locking pin 15 from colliding with the fixing plate 22.

[0052] In the deadbolt state, the first handle 1 rotates, and the handle base 8 rotates, causing the first clutch tooth 82 to rotate. Since the locking pin 15 fixes the first panel 21 and the deadbolt block 9 relatively, the locking pin 15 moves relatively within the clearance hole 85. The first clutch tooth 82 forces the second clutch tooth 91 to push the deadbolt block 9 and the button 11 away from the first clutch tooth 82. The magnet 131 and the magnetic part 132 disengage, and the magnetic attraction decreases, thus pushing the deadbolt block 9 and the button 11 away from the bolt 3. The second clutch tooth 91 disengages from the first clutch tooth 82 until the locking pin 15 disengages from the through hole 42. At the same time, the first handle 1 drives the fixing pin of the connecting piece 10 to move within the arc-shaped elongated hole 43. When the locking pin 15 disengages from the through hole 42, the fixing pin happens to abut against one end of the arc-shaped elongated hole 43. The rotation of the first handle 1 drives the locking bar 4 to rotate synchronously through the connecting piece 10, the fixing pin, and the locking piece 41, thereby driving the bolt 3 to perform the unlocking action.

[0053] The elastic force of the second retaining device 14 helps to push the anti-locking block 9 and the button 11 to disengage the locking pin 15 from the through hole 42. The elastic force of the second retaining device 14 keeps the locking pin 15 in position, preventing the locking pin 15 from inserting back into the through hole 42 on its own.

[0054] In this invention, the lock hole 20 on the first panel 21 is an arc-shaped elongated hole. The locking pin 15 passes through the arc-shaped elongated hole and the through hole 42 and is inserted into the lock hole 20 of the fixing piece 22, which can also achieve the above function.

[0055] To improve the reliability of the present invention, the handle base 8 is provided with a limiting hole 85. The button 11 is connected to a limiting block 12 that passes through the limiting hole 85. The limiting block 12 moves with the button 11. After the button 11 is pressed down, the limiting block 12 protrudes out of the limiting hole 85. The user can press the limiting block 12 to reset the button 11. Preferably, the limiting block 12 and the limiting hole 85 are T-shaped. The T-shaped limiting block 12 and the limiting hole 85 cooperate to prevent the button 11 from detaching from the handle base 8.

[0056] In this invention, the second handle 6 can be replaced by a lock cylinder that is rotated by a key.

[0057] The terms used in this invention, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are merely for distinction.

[0058] In this invention, the terms "a," "an," etc., are used not to indicate a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0059] In this invention, terms indicating direction or location such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are used to indicate relative positions rather than absolute positions.

[0060] Terms used in this invention, such as "approximately," "generally," "approximately," and "similar," are limiting terms used to indicate features that exist but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context.

Claims

1. A lock with an improved deadbolt structure, comprising a first fixing component (2) for mounting a first handle (1) and a bolt (3), wherein the first handle (1) drives the bolt (3) to perform an unlocking action via a lock bar (4), characterized in that, The first handle (1) includes a handle base (8) on which a button (11) is movably mounted. A first retaining device (13) and a second retaining device (14) are provided between the handle base (8) and the button (11). A locking pin (15) is movably mounted on the side of the button (11) facing the lock bar (4). The first fixing component (2) is provided with a lock hole (20). The lock bar (4) is provided with a through hole (42) through which the locking pin (15) passes. The handle base (8) is provided with a clearance hole (85) through which the locking pin (15) passes. The handle base (8) and the button (11) are engaged by a clutch structure. The first handle (1) has a locked state and a normal state. The handle base (8) and the lock bar (4) have a transmission connection with a loose engagement. In the locked state, pressing button (11) causes the locking pin (15) to pass through the lock hole (20) and the through hole (42). The first retaining device (13) holds the locking pin (15) in place, fixing the lock bar (4) and the first fixing component (2) relative to each other. The clutch structure between the handle seat (8) and the button (11) engages. In normal condition, the handle seat (8) rotates by the first preset angle to eliminate the misfit between the handle seat (8) and the lock bar (4). The handle seat (8) uses the clutch structure to disengage the lock pin (15) from the lock hole (20) or through hole (42) to release the reverse lock. The second holding device (14) holds the lock pin (15) in the same state, so that the clutch structure is disengaged. The handle seat (8) continues to rotate by the second preset angle, and the handle seat (8) drives the lock bar (4) to rotate.

2. The lock with the improved deadbolt structure according to claim 1, characterized in that, The clutch structure includes a first clutch tooth (82) and a second clutch tooth (91) located between the handle seat (8) and the button (11). In the locked state, the button (11) pushes the second clutch tooth (91) to approach and engage with the first clutch tooth (82). In the normal state, the handle seat (8) rotates, causing the first clutch tooth (82) to rotate. The first clutch tooth (82) forces the second clutch tooth (91) to push the locking pin (15) and the button (11) to move away from the first clutch tooth (82) to disengage the holding force of the first holding device (13).

3. The lock with the improved deadbolt structure according to claim 2, characterized in that, A locking block (9) is provided on the side of the button (11) facing the first clutch tooth (82), and the locking pin (15) is provided on the locking block (9). A mounting groove (81) is provided on the side of the handle seat (8) away from the lock tongue (3). The button (11) is limited and movable in the mounting groove (81). The locking block (9) is movably placed between the bottom surface of the mounting groove (81) and the inner side surface of the button (11). The bottom surface of the mounting groove (81) is provided with the first clutch tooth (82), and the locking block (9) is provided with the second clutch tooth (91).

4. The lock with the improved deadbolt structure according to claim 3, characterized in that, The top of the first clutch tooth (82) protrudes from the bottom surface of the mounting groove (81), and the top of the second clutch tooth (91) is flush with the mating surface (90) of the anti-locking block (9) facing the handle seat (8).

5. The lock with the improved deadbolt structure according to claim 4, characterized in that, The first clutch tooth (82) and the second clutch tooth (91) both have a cutting surface (92) at the top of their teeth. The cutting surface (92) of the second clutch tooth (91) is flush with the mating surface (90), and the tooth groove of the second clutch tooth (91) is recessed into the mating surface (90).

6. The lock with the improved deadbolt structure according to claim 3, characterized in that, The axes of the first clutch tooth (82) and the second clutch tooth (91) are on the rotation axis of the handle seat (8). The handle seat (8) has a first groove (83) at the center of the first clutch tooth (82), and the anti-locking block (9) has a second groove (93) at the center of the second clutch tooth (91). The second retaining device (14) is accommodated between the first groove (83) and the second groove (93).

7. The lock with the improved deadbolt structure according to claim 6, characterized in that, The first groove (83) has a positioning hole (84) at its center, and the second groove (93) has a positioning post (94) at its center. The positioning post (94) passes through the positioning hole (84) and moves within the positioning hole (84) as the anti-locking block (9) moves. The second retaining device (14) is a spring and is sleeved on the positioning post (94).

8. The lock with the improved deadbolt structure according to claim 3, characterized in that, The mounting groove (81) is provided with the relief hole (85) around the first clutch tooth (82), and the relief hole (85) is an arc-shaped hole about the rotation axis of the handle seat (8).

9. The lock with the improved deadbolt structure according to claim 1, characterized in that, The first holding device (13) includes a magnet (131) and a magnetic part (132). The magnet (131) is located on the handle base (8), and the magnetic part (132) is located on the button (11). After the button (11) is pressed, the magnetic part (132) approaches the magnet (131). The magnetic attraction holding force between the magnetic part (132) and the magnet (131) is greater than the elastic force of the second holding device (14).

10. The lock with the improved deadbolt structure according to claim 1, characterized in that, The lock bar (4) has a synchronously rotating lock plate (41) on one side of the first handle (1). The lock plate (41) has the through hole (42), and the axis of the through hole (42) is not the same as the axis of rotation of the lock bar (4).

11. The lock with the improved deadbolt structure according to claim 10, characterized in that, A connecting piece (10) is provided between the lock plate (41) and the handle seat (8). After the handle seat (8) and the connecting piece (10) are connected by transmission, they rotate synchronously. The lock plate (41) has an arc-shaped long hole (43) around the axis of rotation of the lock bar (4). The connecting piece (10) has a pin hole (100) corresponding to the arc-shaped long hole (43). A fixing pin is provided in the pin hole (100) that passes through the arc-shaped long hole (43). The handle seat (8) drives the fixing pin to move in the arc-shaped long hole (43) through the connecting piece (10) until it abuts against the end of the arc-shaped long hole (43) to form the aforementioned false fit. After the fixing pin abuts against the end of the arc-shaped long hole (43), the handle seat (8) rotates and drives the lock bar (4) to rotate.

12. The lock with the improved deadbolt structure according to claim 9, characterized in that, The first fixing component (2) includes a first panel (21) and a fixing piece (22) that are connected and fixed to each other. The first panel (21) is placed between the fixing piece (22) and the first handle (1). The locking piece (41) is placed between the first panel (21) and the fixing piece (22). The fixing piece (22) is provided with a reset device (5) for aligning the through hole (42) of the locking piece (41) with the lock hole (20). The first panel (21) is provided with the lock hole (20). The locking pin (15) passes through the through hole (42) and is inserted into the lock hole (20). Alternatively, the locking hole (20) on the fixing piece (22) and the first panel (21) are provided with an arc-shaped elongated hole. The locking pin (15) passes through the arc-shaped elongated hole and the through hole (42) and is inserted into the lock hole (20).

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