A latch structure of a door lock

Abstract

The utility model provides a kind of anti-lock structure of door lock, including the panel one installed in door inner side, the center of panel one is equipped with shaft sleeve, and handle head is rotatably connected in shaft sleeve;One end of handle head is sleeved with steering wheel one and clasp spring one;Torsional spring is sleeved on the shaft sleeve, and the both ends of torsional spring extend out elastic abutment, the inner side wall of panel one is equipped with two connecting columns, and two elastic abutments are respectively abutted with two connecting columns;Two abutments one that are respectively abutted with two elastic abutments are equipped on steering wheel one, and the edge of steering wheel one is equipped with locking groove;The inside of panel one is equipped with locking block that can move along the axial direction of shaft hole.Due to the linkage connection of handle inside and outside door by square shaft, square shaft is also circumferentially fixedly connected with steering wheel one, so that handle outside door cannot rotate in anti-lock state, solve the problem that handle outside door can idle drive handle inside door to rotate in anti-lock state in prior art.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, specifically to a deadbolt structure for a door lock. Background Technology

[0002] In existing door lock products, in order to achieve independent protection on the indoor side, they are usually equipped with an inner handle, an outer handle, and a corresponding deadbolt mechanism. Users can put the door lock into the deadbolt state by operating the deadbolt components associated with the inner handle (such as deadbolt knob, lever, etc.). At this time, the outer handle cannot drive the bolt to unlock, thereby effectively preventing unauthorized entry by outsiders and improving the security of the indoor space.

[0003] However, the mainstream deadbolt mechanisms of such door locks currently on the market still have obvious design flaws and shortcomings in user experience. Specifically, most existing deadbolt mechanisms can only achieve the basic function of "the outer handle cannot drive the bolt to unlock," without effectively restricting the mechanical rotation freedom of the outer handle in the deadbolt state. When the user completes the deadbolt operation through the inner handle, although the outer handle has lost its unlocking function, it can still freely rotate (spin freely) under external force. This design flaw brings many unpleasant user experiences. Utility Model Content

[0004] In view of the problems pointed out in the background art, this utility model proposes a deadbolt structure for a door lock to solve the above-mentioned technical problems.

[0005] The technical solution of this utility model is implemented as follows: A deadbolt structure for a door lock includes a panel installed on the inside of the door. The panel has a central shaft hole, and a bushing coaxial with the shaft hole is located on the inner side of the panel. A handle is rotatably connected within the bushing. A turntable and a retaining spring are fitted onto one end of the handle on the inner side of the panel. The turntable is confined between the bushing and the retaining spring, and the turntable and the handle are circumferentially linked. A torsion spring is fitted onto the bushing, with elastic abutment portions extending from both ends. Two connecting posts are located on the inner wall of the panel, and the two elastic abutment portions abut against the two connecting posts respectively. The turntable has two abutment portions that abut against the two elastic abutment portions respectively. The edge of the turntable is provided with a locking groove; The inner side of panel one is provided with a locking block that can move axially along the shaft hole. The locking block can enter the locking groove to prevent turntable one from rotating. The outer side of panel one is provided with a drive unit that can drive the locking block to move back and forth.

[0006] The present invention is further configured such that an annular guide sleeve is provided on the inner side wall of the first panel, the locking block is slidably connected in the guide sleeve, and a through hole coaxially connected to the guide sleeve is provided on the side wall of the first panel, the driving part passes through the through hole and is connected to the locking block.

[0007] The present invention is further configured such that the locking block is a cylindrical structure adapted to and connected to the guide sleeve, the guide sleeve has a slot on one side wall, the slot is corresponding to the locking groove, and the locking block has a protruding locking part on one side wall, the locking part being located in the slot.

[0008] The present invention is further configured such that a second turntable is also sleeved on the handle head, and the second turntable is provided with two abutting parts that abut against the two elastic abutting parts respectively; the second turntable is located between the first turntable and the bushing, and the second turntable is fixedly connected to the handle head in the circumferential direction; the edge of the second turntable is raised in the direction away from the locking part to form a receiving area, and the locking part is provided with a protruding collision part. When the locking part enters the locking groove, the collision part enters the receiving area. At this time, when the handle head is rotated, the second turntable will collide with the collision part, causing the locking part to leave the locking groove.

[0009] The present invention is further configured such that the end of the handle head is provided with two symmetrical connecting grooves, the inner side wall of the turntable is provided with a linkage part that extends into the connecting groove, the width of the linkage part is smaller than the width of the connecting groove, and it also includes an intermediate disc body that connects the two linkage parts, the center of the intermediate disc body is provided with a square hole.

[0010] The present invention is further configured such that the bottom of the first connecting groove is provided with a second connecting groove, and the inner side wall of the second turntable is provided with a second linkage part that extends into the second connecting groove, the width of the second linkage part being equal to the width of the second connecting groove.

[0011] The present invention is further configured such that a second retaining spring is also sleeved on the handle head, and the second retaining spring is located between the first turntable and the second turntable.

[0012] The present invention is further configured to include an unlocking post coaxially connected to the locking block.

[0013] The present invention is further configured to include a second panel installed on the outside of the door, the second panel having an unlocking hole corresponding to the unlocking post.

[0014] The present invention is further configured such that the turntables on both sides of the receiving area are raised in the direction of approaching the collision part to form a contact part.

[0015] By adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. When the locking part engages with the locking groove on the turntable, it can prevent the turntable from rotating, forming a deadbolt structure. Since the handles inside and outside the door are linked by a square shaft, and the square shaft is fixedly connected to the turntable in one circumference, the handle outside the door cannot rotate in the deadbolt state, which solves the problem in the prior art that the handle outside the door can rotate freely and drive the handle inside the door to rotate in the deadbolt state.

[0016] 2. In the deadbolt state, turning the door handle will unlock and open the door directly. When deadbolt in the deadbolt state, turning the inner handle will rotate the second turntable. As the second turntable rotates, it collides with the locking block's contact part, causing the locking part to leave the locking groove and releasing the deadbolt. Because the width of the first linkage part on the first turntable is smaller than the width of the first connecting groove on the handle, there is a certain gap between the first linkage part and the side wall of the first connecting groove in the direction of rotation. When the handle starts to rotate, it initially does not rotate the first turntable, but only the second turntable. After the second turntable rotates and the deadbolt is released, the first linkage part just contacts the side wall of the first connecting groove. At this point, the handle can drive the first turntable to rotate. The deadbolt state can also be released by pulling the drive unit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the hidden turntable of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the hidden turntable one and turntable two of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of panel one of this utility model. Figure 1 .

[0022] Figure 5 This is a schematic diagram of the structure of panel one of this utility model. Figure 2 .

[0023] Figure 6 This is a schematic diagram of the structure of the locking block and the second turntable of this utility model. Figure 1 .

[0024] Figure 7 This is a schematic diagram of the structure of the locking block and the second turntable of this utility model. Figure 2 .

[0025] Figure 8 This is a schematic diagram of the structure of panel one and panel two of this utility model.

[0026] The following are the labels in the attached diagram: Panel 1, Shaft Hole 2, Bushing 3, Handle Head 4, Turntable 1 5, Snap Ring 1 6, Torsion Spring 7, Elastic Abutment Part 8, Connecting Post 9, Abutment Part 1 10, Locking Slot 11, Locking Block 12, Drive Part 13, Guide Sleeve 14, Through Hole 15, Slot 16, Locking Part 17, Turntable 2 18, Abutment Part 2 19, Receiving Area 20, Collision Part 21, Connecting Slot 1 22, Linkage Part 1 23, Intermediate Disc 24, Square Hole 25, Connecting Slot 2 26, Linkage Part 2 27, Snap Ring 2 28, Unlocking Post 29, Panel 2 30, Unlocking Hole 31, Contact Part 32. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] For reference as follows Figures 1-8 The present invention will be described as follows: Example: This technical solution discloses a door lock deadbolt structure, which is used to realize the deadbolt function of the door lock and solves the problem in the prior art where the outer handle rotates freely and causes the inner handle to rotate when the door is deadbolted. This structure achieves dual operation logic of deadbolt and unlocking through the precise cooperation of multiple components, balancing security and ease of operation.

[0029] A door lock deadbolt structure includes a panel 1 installed on the inside of the door. The panel 1 is cylindrical and has a shaft hole 2 at its center. The inner side of the panel 1 is provided with a bushing 3 coaxial with the shaft hole 2. The bushing 3 is annular and is integrally formed with the panel 1.

[0030] A handle head 4 is rotatably connected inside the bushing 3, and the handle head 4 is axially fixedly connected to the bushing 3.

[0031] A turntable 5 and a retaining ring 6 are fitted onto one end of the handle head 4, located inside the panel 1. The turntable 5 is confined between the bushing 3 and the retaining ring 6, and the turntable 5 and the handle head 4 move in a circumferential manner. The retaining ring 6 prevents the turntable 5 from dislodging from the handle head 4. At the same time, the retaining ring 6 also restricts and positions the axial end of the handle head 4 relative to the bushing 3.

[0032] A torsion spring 7 is fitted onto the bushing 3, and elastic abutment portions 8 extend from both ends of the torsion spring 7.

[0033] Two connecting posts 9 are provided on the inner side wall of panel 1. The two connecting posts 9 are symmetrically arranged about the shaft hole 2, and two elastic abutment parts 8 abut against the two connecting posts 9 respectively. The connecting posts 9 are used to cooperate with the installation of the elastic reset component, and also for the fixed connection between panel 1 and panel 2 30.

[0034] The turntable 5 has two abutment portions 10 that abut against the two elastic abutment portions 8 respectively. The two abutment portions 10 are symmetrically arranged about the shaft hole 2. In the radial direction of the shaft hole 2, the abutment portions 10 are located inside the connecting post 9. When the turntable 5 rotates, the abutment portions 10 will drive the corresponding elastic abutment portions 8 to move and twist, causing the torsion spring 7 to accumulate elastic potential energy. When the rotation of the turntable 5 is released, the turntable 5 returns to its original position under the action of the torsion spring 7.

[0035] The handle head 4 is thickened at one end located outside the panel 1 and is larger than the diameter of the shaft hole 2, so that it abuts against the panel 1 and restricts and positions the other end of the handle head 4 and the bushing 3 in the axial direction.

[0036] The edge of turntable 5 is provided with a locking groove 11.

[0037] The inner side of panel 1 is provided with a locking block 12 that can move along the axial direction of shaft hole 2. The locking block 12 can enter the locking groove 11 to prevent turntable 5 from rotating.

[0038] The outer side of panel 1 is provided with a drive unit 13 that can drive the locking block 12 to move back and forth.

[0039] Pressing the drive unit 13 causes the locking block 12 to move forward into the locking groove 11, preventing the turntable 5 from rotating, the square shaft fixedly connected to the turntable 5 from rotating, and the handle connected to the square shaft from rotating, thus locking the lock in the reverse state. When it is necessary to release the reverse state, pull the drive unit 13 outward, causing the locking block 12 to move backward away from the locking groove 11, at which point the turntable 5 can rotate.

[0040] A circular guide sleeve 14 is provided on the inner side wall of panel 1. A locking block 12 is slidably connected inside the guide sleeve 14. A through hole 15 is provided on the side wall of panel 1, which is coaxially connected to the guide sleeve 14. A driving part 13 passes through the through hole 15 and is connected to the locking block 12. The driving part 13 and the locking block 12 form a detachable connection.

[0041] The locking block 12 is a cylindrical structure that is adapted to connect with the guide sleeve 14. A slot 16 is provided on one side wall of the guide sleeve 14. The slot 16 is correspondingly provided with the locking groove 11 (to provide guidance for the movement of the locking part 17). A protruding locking part 17 is provided on one side wall of the locking block 12. The locking part 17 is located in the slot 16. The locking part 17 cooperates with the locking groove 11 to prevent the turntable 5 from rotating.

[0042] The drive unit 13 drives the locking block 12 to reciprocate along the guide sleeve 14.

[0043] A turntable 18 is also fitted onto the handle head 4. The turntable 18 has two abutment portions 19 that abut against the two elastic abutment portions 8 respectively. The two abutment portions 19 are symmetrically arranged about the shaft hole 2. In the radial direction of the shaft hole 2, the abutment portions 19 are located inside the abutment portion 10.

[0044] Turntable 2 18 is located between turntable 1 5 and bushing 3, and turntable 2 18 is fixedly connected to handle head 4 in the circumferential direction.

[0045] The edge of the turntable 18, corresponding to the position of the locking part 17, is raised away from the locking part 17 to form a receiving area 20. The locking part 17 is provided with a protruding collision part 21. When the locking part 17 moves forward into the locking groove 11, the collision part 21 enters the receiving area 20. At this time, the operating handle head 4 is rotated, and the turntable 18 will collide with the collision part 21, causing the locking part 17 to move backward away from the locking groove 11 and release the anti-lock state.

[0046] The turntables 18 on both sides of the receiving area 20 tilt upwards toward the collision part 21 to form a contact part 32. The arrangement of the contact part 32 helps the turntables 18 drive the locking block 12 to move backward and release the locked state.

[0047] When the locking part 17 enters the locking groove 11, the collision part 21 simultaneously enters the receiving area 20. At this time, the rotation of the turntable 18 can drive the locking part 17 to disengage from the locking groove 11 through the collision between the contact part 32 and the collision part 21.

[0048] The handle head 4 has two symmetrical connecting grooves 22 at its end. The inner side wall of the turntable 5 has a linkage part 23 that extends into the connecting groove 22. The width of the linkage part 23 is smaller than the width of the connecting groove 22. This design ensures that there is a preset gap between the handle head 4 and the turntable 5 in the circumferential direction. The two will not be linked when initially rotating. Only when the rotation angle reaches the upper limit of the gap range and the linkage part 23 abuts against the side wall of the connecting groove 22 will the two achieve circumferential linkage.

[0049] In the initial state, when the handle head 4 or the turntable 5 rotates, it will not drive the other part (turntable 5 or handle head 4) to rotate in conjunction. Only when the handle head 4 or the turntable 5 rotates through a certain angle and the linkage part 23 comes into contact with the side wall of the connecting groove 22 can it drive the other part to rotate.

[0050] It also includes an intermediate disc 24 connecting the two linkage parts 23, with a square hole 25 at the center of the intermediate disc 24. The square hole 25 is connected to a square shaft, so that the square shaft is circumferentially fixedly connected to the turntable 5. The handle head 4 has a hole corresponding to the square hole 25 for the square shaft to extend into. The square shaft is rotatably connected to the handle head 4 on the inner side of the door, and the square shaft is circumferentially fixedly connected to the handle head on the panel 30 on the outer side of the door.

[0051] The square shaft is a conventional transmission component of the door lock. The square shaft is circumferentially fixed to the turntable 5 via the intermediate plate 24, and is also circumferentially fixed to the handle head on the outer side panel 30 of the door.

[0052] The torsion spring 7 is sleeved on the bushing 3 and extends elastic abutment parts 8 at both ends. The elastic abutment parts 8 cooperate with the connecting post 9 of panel 1, the abutment part 10 of turntable 5, and the abutment part 19 of turntable 2 to realize the rotation and reset function of turntable 5 and turntable 2.

[0053] The bottom of the first connecting groove 22 is provided with a second connecting groove 26. The inner side wall of the second turntable 18 is provided with a second linkage part 27 that extends into the second connecting groove 26. The width of the linkage part is equal to the width of the second connecting groove 26. Through this interference fit design, the second turntable 18 and the handle head 4 form a circumferential fixed connection. When the handle head 4 rotates, it can directly drive the second turntable 18 to rotate synchronously.

[0054] When the handle head 4 on the inside of the door is turned, it can directly drive the turntable 18 to rotate, thus releasing the deadbolt.

[0055] When the handle head 4 on the inside of the door is turned, it needs to be rotated at a certain angle to release the deadbolt state before the turntable 5 can be driven to rotate.

[0056] A retaining ring 28 is also fitted onto the handle head 4, and retaining ring 28 is located between turntable 5 and turntable 18. Turntable 18 is confined between bushing 3 and retaining ring 28. Turntable 5 is confined between retaining ring 28 and retaining ring 6.

[0057] By cooperating with the second retaining ring 28 and the bushing 3, the second turntable 18 is restricted between the bushing 3 and the second retaining ring 28; by cooperating with the second retaining ring 28 and the first retaining ring 6, the first turntable 5 is restricted between the second retaining ring 28 and the first retaining ring 6, so as to achieve precise axial positioning of the two turntables and avoid axial movement from affecting the transmission effect.

[0058] It also includes an unlocking post 29 that is coaxially connected to the locking block 12.

[0059] It also includes a second panel 30 installed on the outside of the door, which has an unlocking hole 31 corresponding to the unlocking pin 29 (for use in unlocking operations from the outside). When it is necessary to unlock the door from the outside, a tool is inserted through the unlocking hole 31 to push the unlocking pin 29, the locking block 12, and the drive unit 13 to move backward, thereby unlocking the door.

[0060] Locking process: Press the drive unit 13 on the outer side of the control panel 1 inward. The drive unit 13 drives the locking block 12 to move forward along the guide sleeve 14 axially. The locking part 17 on the locking block 12 passes through the slot 16 of the guide sleeve 14 and precisely enters the locking groove 11 of the turntable 5. At this time, the locking part 17 and the locking groove 11 form a snap-fit ​​engagement, directly preventing the turntable 5 from rotating. Since the square shaft is circumferentially fixed to the turntable 5 through the square hole 25 of the intermediate disc 24, the locked state of the turntable 5 prevents the square shaft from rotating; and since the square shaft is circumferentially fixed to the handle head on the outer side panel 30 of the door, the outer handle cannot rotate, and the door lock officially enters the deadbolt state. During this process, the collision part 21 of the locking block 12 simultaneously enters the receiving area 20 of the turntable 18, providing a basis for the subsequent unlocking action from inside the door.

[0061] Unlocking from the inside includes two methods: 1. Manually pull the drive unit 13 to unlock: Pull the drive unit 13 on the outer side of panel 1 outward. The drive unit 13 drives the locking block 12 to move backward along the guide sleeve 14. The locking part 17 of the locking block 12 moves backward along with it, gradually disengaging from the locking groove 11 of the turntable 5, and the rotation restriction of the turntable 5 is released. At this time, turning the inner or outer handle can drive the door lock core mechanism through the square shaft to achieve the door opening action.

[0062] 2. Unlocking by rotating the handle: In the deadbolt state, rotating the handle on the inside of the door causes the handle head 4 on the inside of the door to rotate. Since the handle head 4 is circumferentially fixed to the turntable 18, the rotation of the handle head 4 directly drives the turntable 18 to rotate synchronously. During the rotation of the turntable 18, the contact parts 32 on both sides of its receiving area gradually approach the collision part 21 of the locking block 12 and collide with it. The axial thrust generated by the collision drives the locking block 12 to move axially backward along the guide sleeve 14, and the locking part 17 disengages from the locking groove 11 of the turntable 5, thus releasing the deadbolt state.

[0063] 3. Transmission connection after unlocking: After the deadbolt is released, continue to rotate the inner door handle. The handle head 4 drives the turntable 18 to rotate continuously. Due to the circumferential gap between the handle head 4 and the turntable 5, only the turntable 18 rotates in the initial rotation phase. When the rotation angle of the handle head 4 reaches the upper limit of the gap range, the side wall of the connecting groove 22 of the handle head 4 abuts against the linkage part 23 of the turntable 5. At this time, the handle head 4 begins to drive the turntable 5 to rotate synchronously. The turntable 5 drives the square shaft to rotate through the square hole 25. The square shaft drives the door lock tongue mechanism to move, ultimately realizing the door opening action. After the door is opened, the handle is released, and the torsion spring 7 releases the accumulated elastic potential energy. The elastic abutment parts 8 at both ends of the spring 7 push the abutment part 10 of the turntable 5 and the abutment part 19 of the turntable 18, respectively, causing the turntable 5, the turntable 18, and the handle head 4 to rotate in the opposite direction to reset, and each component returns to its initial position.

[0064] When it is necessary to unlock the door from the outside, use a suitable tool (such as a dedicated unlocking key, flathead screwdriver, etc.) to insert into the unlocking hole 31 of panel 2 30. The end of the tool should contact the unlocking pin 29 and push the unlocking pin 29 inward. The unlocking pin 29 will cause the locking block 12 to move axially backward along the guide sleeve 14, and the locking part 17 will disengage from the locking groove 11 of the turntable 5, thus releasing the deadbolt. At this time, rotating the outside handle will drive the door lock core mechanism through the square shaft, thereby opening the door.

[0065] To address the issue of the outer handle spinning freely in the deadbolt state: In existing technologies, some deadbolt structures only restrict the core bolt mechanism of the door lock, allowing the outer handle to still spin freely and drive the inner handle to rotate synchronously. In this solution, in the deadbolt state, the locking block 12 engages with the locking groove 11 of the turntable 5 through the locking part 17, directly locking the turntable 5. Since the square shaft is circumferentially fixed to the turntable 5, the locking of the turntable 5 prevents the square shaft from rotating, thus preventing the outer handle, which is circumferentially fixed to the square shaft, from rotating.

[0066] The door unlocking operation from the inside is highly convenient, featuring dual unlocking methods: users inside the door can unlock in two ways—either by manually pulling the drive unit 13 for quick unlocking, or by directly rotating the handle, which automatically unlocks through the collision of the turntable 18 and the locking block 12, requiring no additional complex operations. The automatic unlocking design by rotating the handle, in particular, aligns with users' conventional door-opening habits, enhancing the user experience; simultaneously, the dual unlocking methods improve structural reliability, preventing door opening failures caused by a single unlocking method malfunction.

[0067] The radial positional relationship between the first abutment part 10, the second abutment part 19 and the connecting post 9: the three are distributed on the inner side, the middle and the outer side in the radial direction of the shaft hole 2, ensuring that the elastic abutment part 8 of the torsion spring 7 can form effective abutment with the three parts at the same time. This ensures that the torsion spring 7 can be driven to accumulate elastic potential energy when the first turntable 5 and the second turntable 18 rotate, and also ensures that the reset force of the torsion spring 7 can be accurately transmitted to the two turntables to avoid reset failure.

[0068] Design of the contact part 32 of turntable 2 18: The raised structure of the contact part 32 increases the contact area with the collision part 21 of the locking block 12, improves the stability of the thrust during the collision, and ensures that the locking block 12 can be reliably driven to move and unlock.

[0069] The gap between the linkage part 123 and the connecting groove 122: This gap needs to be determined based on the torsion angle of the torsion spring 7 and the travel of the locking part 17. The rotation angle corresponding to the conventional design gap is 3-10°. This ensures that the linkage part 123 only contacts the side wall of the connecting groove 12 after the turntable 218 drives the locking part 17 to completely disengage from the locking groove 11, thus achieving an orderly connection between unlocking and opening the door.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A deadbolt structure for a door lock, comprising a panel one installed on the inner side of a door, the panel one having a central shaft hole, and a bushing coaxial with the shaft hole on the inner side of the panel one, with a handle head rotatably connected inside the bushing; a turntable one and a retaining spring one are sleeved on one end of the handle head located on the inner side of the panel one, the turntable one being confined between the bushing one and the retaining spring one, and the turntable one and the handle head being circumferentially linked; a torsion spring is sleeved on the bushing one, with elastic abutment portions extending from both ends of the torsion spring; two connecting posts are provided on the inner sidewall of the panel one, and the two elastic abutment portions abut against the two connecting posts respectively; the turntable one has two abutment portions one respectively abutting against the two elastic abutment portions, characterized in that: The edge of the turntable is provided with a locking groove; The inner side of panel one is provided with a locking block that can move axially along the shaft hole. The locking block can enter the locking groove to prevent turntable one from rotating. The outer side of panel one is provided with a drive unit that can drive the locking block to move back and forth.

2. The deadbolt structure of a door lock according to claim 1, characterized in that: The inner sidewall of the first panel is provided with an annular guide sleeve, and the locking block is slidably connected inside the guide sleeve. The sidewall of the first panel is provided with a through hole coaxially connected with the guide sleeve, and the driving part passes through the through hole and is connected to the locking block.

3. The deadbolt structure of a door lock according to claim 2, characterized in that: The locking block is a cylindrical structure that is adapted to and connected to the guide sleeve. A slot is provided on one side wall of the guide sleeve, and the slot is correspondingly set with the locking groove. A protruding locking part is provided on one side wall of the locking block, and the locking part is located in the slot.

4. The deadbolt structure of a door lock according to claim 3, characterized in that: The handle head is also fitted with a second turntable, which has two abutting parts that abut against the two elastic abutting parts respectively. The second turntable is located between the first turntable and the bushing, and the second turntable is fixedly connected to the handle head in the circumferential direction. The edge of the second turntable is raised in the direction away from the locking part to form a receiving area. The locking part has a protruding collision part. When the locking part enters the locking groove, the collision part enters the receiving area. At this time, when the handle head is rotated, the second turntable will collide with the collision part, causing the locking part to leave the locking groove.

5. The deadbolt structure of a door lock according to claim 4, characterized in that: The handle head has two symmetrical connecting grooves at its end. The inner side wall of the turntable has a linkage part that extends into the connecting groove. The width of the linkage part is smaller than the width of the connecting groove. The turntable also includes an intermediate disc that connects the two linkage parts. The center of the intermediate disc has a square hole.

6. The deadbolt structure of a door lock according to claim 5, characterized in that: The bottom of the first connecting groove is provided with a second connecting groove, and the inner side wall of the second turntable is provided with a second linkage part that extends into the second connecting groove. The width of the linkage part is equal to the width of the second connecting groove.

7. The deadbolt structure of a door lock according to claim 4, characterized in that: The handle head is also fitted with a retaining spring two, which is located between turntable one and turntable two.

8. The deadbolt structure of a door lock according to claim 3, characterized in that: It also includes an unlocking post that is coaxially connected to the locking block.

9. The deadbolt structure of a door lock according to claim 8, characterized in that: It also includes a second panel installed on the outside of the door, which has an unlocking hole corresponding to the unlocking post.

10. The deadbolt structure of a door lock according to claim 4, characterized in that: The turntables on both sides of the receiving area are raised towards the collision part to form a contact part.

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