Door lock capable of automatically locking by touching door
By linking the anti-picking bolt and the stop plate, the door automatically locks when closed, solving the problems of users forgetting to lock the door or the operation being cumbersome, and improving the security and convenience of the door lock.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TECESIUM GRP CO LTD
- Filing Date
- 2026-01-15
- Publication Date
- 2026-05-08
AI Technical Summary
Existing door locks reduce door security if users forget to lock the door or if the operation is cumbersome.
The door uses an anti-picking latch and a stop plate, and through the design of the linkage rod and sliding bracket, the door automatically locks when closed, eliminating the need for users to control the deadbolt with a key or handle.
It enables automatic deadbolting of the door after it is closed, saving users time, improving door lock security, and avoiding security risks caused by forgetting or cumbersome operation.
Smart Images
Figure CN121992995A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of door lock technology, and in particular relates to a door lock that automatically locks when the door is touched. Background Technology
[0002] A door lock is a device installed on a door to prevent unauthorized entry. Modern door locks are typically latch locks; when the door is closed, the bolt and spring work together to insert the bolt into the keyhole in the door frame. To prevent unauthorized entry with tools, users can use a key or handle to extend the bolt and insert it into the pre-set keyhole in the door frame, enhancing security. However, users may forget to lock the door, reducing security, and the process of taking out the key, locking the door, and then putting the key away is somewhat cumbersome. Summary of the Invention
[0003] In view of this, the present invention aims to provide a door lock that automatically locks upon contact with the door, so that the door automatically locks after the door is closed.
[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A door lock that automatically locks upon contact with the door, including... The outer casing has an unlocking channel inside; The anti-picking bolt has one end connected to a linkage rod, which has an unlocking end placed in the unlocking channel. A deadbolt, one end of which is connected to a sliding frame, the sliding frame having a stop wall, a sliding groove and a deadbolt pull head; The stop lever has a rotating part, an unlocking part, and a stop top. The stop lever can rotate around the rotating part. The sliding frame is placed on one side of the stop lever. When the stop lever rotates to its limit position in the direction of the sliding frame, the stop top can press against the stop wall. At this time, the unlocking part is at least partially placed in the unlocking channel. When the unlocking end moves along the unlocking channel, it can push the unlocking part away from the unlocking channel. A tension spring, one end of which is attached to the deadbolt and provides tension to the sliding bracket in the direction of the deadbolt.
[0005] Furthermore, the linkage rod also has a limiting head, a compression spring abutting against the limiting head, and the compression spring is compressed when the anti-pull lock tongue moves into the housing.
[0006] Furthermore, a torsion spring is sleeved on the rotating shaft of the rotating part, the unlocking part protrudes from the plane where the stop lever is located along the thickness direction, and one torsion foot of the torsion spring abuts against the unlocking part, and the torsion spring is compressed when the anti-pull lock tongue moves into the housing.
[0007] Furthermore, this door lock also includes an unlocking link, which can rotate around one end of itself. The sliding frame has an unlocking protrusion. The end of the unlocking link away from its own axis of rotation can abut against the unlocking protrusion. When the unlocking link rotates around its own axis of rotation, it can pull the deadbolt into the housing through the unlocking protrusion.
[0008] Furthermore, this application also includes a latch, the outer shell has a latch hole, the latch hole and the latch respectively have a first limiting surface and a second limiting surface, the latch is connected to the latch rod, and the latch can move along the length direction of the latch rod, and when the latch extends out of the latch hole, the latch can rotate around the axial direction of the latch rod.
[0009] Furthermore, a second spring and an unlocking plate are sleeved on the locking tongue rod, and the locking tongue rod has a limiting edge in the radial direction. The two ends of the second spring abut against the unlocking plate and the limiting edge, respectively. A fixing block has a through hole through which the locking tongue rod passes.
[0010] Furthermore, it also includes a proximity switch and a signal trigger lever, one end of which has a trigger head that can approach or move away from the contact of the proximity switch, and the sliding frame has a guide slope, with the trigger head corresponding to the guide slope.
[0011] Furthermore, the end of the anti-pull latch away from the linkage rod has a guide surface, and the guide surface is inclined in the direction away from the linkage rod.
[0012] Furthermore, it also includes a latch, which has a stop surface that corresponds to an anti-pull latch, and the anti-pull latch can abut against the stop surface.
[0013] Furthermore, it also includes a latch having a deadbolt hole into which the deadbolt bolt can be inserted.
[0014] Compared with existing technologies, the door lock that automatically locks upon touching the door as described in this invention has the following advantages: This invention employs an anti-picking bolt and a stop plate in combination. When the deadbolt is not needed, the sliding frame remains stationary under the action of the stop plate. When the anti-picking bolt moves into the outer shell, the unlocking end of the linkage rod interferes with the unlocking part of the stop plate, causing the unlocking part to drive the stop plate to rotate, thus separating the top from the stop wall. The deadbolt moves outward under the pull of the tension spring, thereby completing the door locking action. This allows the user to directly deadbolt the door after closing it, without having to control the deadbolt with a key or handle. Attached Figure Description
[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the door lock; Figure 2 Does the door lock have an internal structure diagram? Figure 3 A schematic diagram showing the interaction between the door unlocking linkage and the structure; Figure 4 This is a schematic diagram showing the interaction between the sliding bracket and the signal trigger lever; Figure 5 A schematic diagram of the cooperation structure between the stop lever and the sliding bracket; Figure 6 A schematic diagram of the anti-pulling bolt structure; Figure 7 This is a schematic diagram showing the fit between the latch and the latch hole.
[0016] Explanation of reference numerals in the attached figures: 1-Outer shell; 11-Unlocking channel; 12-Lock hole; 121-Second limiting surface; 2-Anti-picking lock tongue; 21-Linkage rod; 211-Unlocking end; 22-Guide surface; 212-Limiting head; 23-Compression spring; 3-Deadlock lock tongue; 31-Sliding frame; 311-Stop wall; 312-Sliding groove; 313-Deadlock pull head; 314-Unlocking protrusion; 315-Guide slope; 32-Tension spring; 4-Stop lever; 41-Rotating part; 4 2-Unlocking part; 43-Top stop; 44-Torsion spring; 5-Unlocking linkage; 51-First hook; 52-Second hook; 6-Lock tongue; 61-Lock tongue rod; 611-Limiting edge; 62-First spring; 63-Second spring; 64-Fixing block; 65-Unlocking plate; 66-First limiting surface; 7-Proximity switch; 8-Signal trigger lever; 81-Trigger head; 9-Lock catch; 91-Top stop surface; 92-Dock hole; 10-Door handle lever. Detailed Implementation
[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.
[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0021] The door lock that automatically locks upon contact with the door as described in this application includes: The outer casing 1 has an unlocking channel 11 inside; Anti-picking lock tongue 2, one end of which is connected to linkage rod 21, linkage rod 21 has unlocking end 211, the unlocking end is placed in unlocking channel 11; The deadbolt 3 has one end connected to the sliding frame 31, which has a stop wall 311, a sliding groove 312 and a deadbolt pull head 313. The stop lever 4 has a rotating part 41, an unlocking part 42, and an abutment top 43. The stop lever 4 can rotate around the rotating part 41. The sliding frame 31 is placed on one side of the stop lever 4. When the stop lever 4 rotates to the limit position in the direction of the sliding frame 31, the abutment top 43 can press against the stop wall 311. At this time, the unlocking part 42 is at least partially placed in the unlocking channel 11. When the unlocking end 211 moves along the unlocking channel 11, it can push the unlocking part 42 away from the unlocking channel 11. A tension spring 32, one end of which is attached to the deadbolt pull head 313 and provides a pulling force to the sliding bracket 31 in the direction of the deadbolt bolt 3.
[0022] Understandably, the outer casing 1 has a pull head corresponding to the deadbolt pull head 313. A section of the tension spring 32 away from the deadbolt pull head 313 is engaged with the pull head. The pull head can be mounted on the outer casing 1, protruding from the casing 1's plate, or mounted on a lever or lever inside the outer casing 1, protruding from the lever or lever. The outer casing 1 extends a column into the internal space. This column is placed within the sliding groove 312. The column can be a keyhole or a connecting post for mounting a handle, or it can be a cylindrical or prismatic structure specifically designed for positioning and guiding the sliding groove 312.
[0023] The anti-picking bolt 2 and the stop plate work together. When the deadbolt is not needed, the sliding frame 31 remains stationary under the action of the stop plate 4. When the anti-picking bolt 2 moves into the outer shell 1, the unlocking end 211 of the linkage rod 21 interferes with the unlocking part 42 of the stop plate 4, causing the unlocking part 42 to drive the stop plate 4 to rotate, so that the top 43 separates from the stop wall 311. The deadbolt bolt 3 moves outward under the pull of the tension spring 32, thereby completing the door locking action. This allows the user to directly lock the door after closing it, without having to control the deadbolt bolt 3 with a key or handle, thus saving the user's locking time and preventing the user from leaving the door unlocked due to being in a hurry or forgetting, thereby improving the security of the door lock.
[0024] In this embodiment, the door lock is used in conjunction with a latch 9, which is installed on the door frame corresponding to the door lock. The latch 9 has a top surface 91, which corresponds to the anti-picking bolt 2. The anti-picking bolt 2 can abut against the top surface 91, and during the closing process, the anti-picking bolt 2 cooperates with the top surface 91 of the latch 9, so that the latch 9 abuts against the top surface 91. More specifically, the end of the anti-picking bolt 2 away from the linkage rod 21 has a guide surface 22, and the guide surface 22 is inclined in the direction away from the linkage rod 21. During the closing process, the guide surface 22 contacts one edge of the top surface 91, and the anti-picking bolt 2 moves into the outer shell 1 through the guiding action of the guide surface 22, so that the anti-picking bolt 6 moves into the outer shell 1 during the closing process. The latch 9 has a deadbolt hole 92. When the deadbolt 3 extends out of the outer shell 1, the deadbolt 3 can be inserted into the deadbolt hole 92, thus completing the deadbolt locking of the door.
[0025] In this embodiment, a latch hole 12 is provided on one side of the outer casing 1, and a latch 6 can be placed in the latch hole 12 and can move along the axial direction of the latch hole 12. The latch hole 12 and the latch 6 respectively have a first limiting surface 66 and a second limiting surface 121 that cooperate with each other, and there are at least two first limiting surfaces 66 or at least two second limiting surfaces 121. In this embodiment, the cross-section of the latch 6 and the cross-section of the latch hole 12 are both rectangular. The first limiting surface 66 can be a plane on one side of the latch 6, and the second limiting surface 121 can be the hole wall on one side of the latch hole 12. The end of the latch 6 away from its own inclined surface is connected to a latch rod 61. A fixing block 64 is also provided inside the outer casing 1, and the fixing block 64 has a through hole. The latch rod 61 passes through the fixing block 64 through the through hole. A first spring 62 and a second spring 63 are sleeved on the latch rod 61. An unlocking piece 65 is sleeved on the latch rod 61. The first spring 62 and the second spring 63 are placed on both sides of the fixing block 64 and along the length of the latch rod 61. The distance between the second spring 63 and the latch 6 is greater than the distance between the first spring 62 and the latch 6. The end of the latch rod 61 away from the latch 6 has a limiting edge 611 in the radial direction. The two ends of the second spring 63 abut against the limiting edge 611 and the unlocking piece 65, respectively. When the second spring 63 is compressed, the latch 6 can move to the outside of the outer shell 1 until it separates from the latch hole 12. At this time, the latch 6 can rotate around the axis of the latch rod 61. The second spring 63, the unlocking plate 65, and the latch rod 61 work together to enable the latch 6 to perform its own locking function. When the angle of the latch 6 needs adjustment, simply push the latch rod 61 outwards to move the latch 6 out of the latch hole 12, allowing the latch 6 to rotate and change its angle orientation. After the latch 6 angle is adjusted, the second spring 63 allows the latch 6 to re-enter the latch hole 12. The second limiting surface 121 of the latch hole 12 then engages with the first limiting surface 66 of the latch 6, preventing the latch 6 from rotating during operation. This allows for quick adjustment of the latch 6's angle orientation, reducing time waste and avoiding impacts on the installation schedule. Similarly, the anti-picking latch 2 has two guide surfaces 22, which are mirror images of each other on both sides of the anti-picking latch 2, enabling it to automatically lock in different door opening and closing directions.
[0026] The linkage rod 21 also has a limiting head 212, and a compression spring 23 abuts against the limiting head 212. When the anti-pull latch 2 moves into the housing 1, the compression spring 23 is compressed. It is understood that a corresponding limiting head 212 is also provided inside the housing 1, and the compression spring 23 is positioned between the two limiting heads 212. The limiting head 212 can be a part protruding from the housing plate, or it can be a lever or lever located inside the housing 1, causing the pull head to protrude from the lever or lever. When the anti-pull latch 2 separates from the abutting surface 91, the anti-pull latch 2 can extend out of the housing 1 along the unlocking channel 11 under the action of the compression spring 23.
[0027] A torsion spring 44 is sleeved on the rotating shaft of the rotating part 41 of the brake pad. The unlocking part 42 protrudes from the plane where the stop plate 4 is located along the thickness direction of the stop plate 4. One torsion foot of the torsion spring 44 abuts against the unlocking part 42, and the other torsion foot abuts against the fixing block 64. When the anti-pull lock tongue 2 moves into the outer shell 1, the torsion spring 44 is compressed. More specifically, in this embodiment, when the anti-pull lock tongue 2 moves into the outer shell 1, the unlocking end 211 of the linkage rod 21 contacts the unlocking part 42 in the unlocking channel 11 and pushes the unlocking part 42 out of the unlocking channel 11, causing the stop plate 4 to rotate, thereby compressing the torsion spring 44. When the anti-pull lock tongue 2 separates from the abutting surface 91 and moves out of the outer shell 1, the unlocking end 211 separates from the unlocking part 42, and the stop plate 4 has a tendency to reset under the action of the torsion spring 44.
[0028] This door lock also includes an unlocking linkage 5, which is rotatable around one end. The sliding bracket 31 has an unlocking protrusion 314. The end of the unlocking linkage 5 away from its own pivot can abut against the unlocking protrusion 314. When the unlocking linkage 5 rotates around its own pivot, it can pull the deadbolt 3 into the outer casing 1 through the unlocking protrusion 314, thereby unlocking the door lock. Specifically, the unlocking linkage 5 can be directly connected to the handle, and the handle lever can be controlled to rotate through the door handle. Alternatively, a handle lever can be connected to the pivot of the door handle, with at least part of the handle lever abutting against the door handle, and the door lock can be controlled by the handle lever. When the unlocking linkage 5 rotates, the handle lever has a first hook 51 and a second hook 52. The unlocking plate 65 is placed within the area surrounded by the first hook 51, and the second hook 52 abuts against the unlocking protrusion 314. This allows the door handle to rotate simultaneously, driving the bolt 6 and the deadbolt 3 to move into the housing 1, thereby opening the door. This eliminates the cumbersome operation of opening the deadbolt 3 separately with a key. At the same time, when the sliding bracket 31 moves into the housing 1 to its limit position, the stop lever 4 of the bolt 6, which has a tendency to reset, moves upward and engages with the stop wall 311, preventing the deadbolt 3 from popping out again, so that the door can be locked by contact.
[0029] It also includes a proximity switch 7 and a signal trigger lever 8. One end of the signal trigger lever 8 has a trigger head 81 that can approach or move away from the contact of the proximity switch 7. The sliding frame 31 has a guide slope 315, and the trigger head 81 corresponds to the guide slope 315. During operation, when the bolt 6 moves into the housing 1, the guide slope 315 contacts the contact, causing the trigger head 81 of the signal trigger lever 8 to move towards the proximity switch 7, thereby triggering the proximity switch 7. This causes the proximity switch 7 to issue a normally open signal. The controller determines that this signal is a normally open door signal and controls the clutch adjustment state of the door handle, connecting the inner and outer door handles so they rotate simultaneously. When the door is closed, the deadbolt 3 and sliding bracket 31 extend outwards, and the trigger head 81 is no longer restricted by the guide slope 315. When the user turns the trigger lever using the handle or key, the trigger head 81 moves away from the proximity switch 7, causing the proximity switch 7 to issue a normally closed signal. The controller determines that this signal is a normally closed door signal and controls the clutch adjustment state of the door handle, disengaging the outer door handle from the linkage structure, thus preventing the door from being opened from the outside. This allows the door lock to be controlled not only by key and door handle but also by IC card swiping, Bluetooth, and other electronic control methods. The specific methods of communicating with the controller via IC Bluetooth, how the controller controls the clutch mechanism, the connection method between the clutch mechanism and the door handles inside and outside, and its structure are all existing technologies and will not be elaborated here.
[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A door lock that automatically locks upon contact with the door, characterized in that: include The outer casing has an unlocking channel inside; The anti-picking bolt has one end connected to a linkage rod, which has an unlocking end placed in the unlocking channel. A deadbolt, one end of which is connected to a sliding frame, the sliding frame having a stop wall, a sliding groove and a deadbolt pull head; The stop lever has a rotating part, an unlocking part, and a stop top. The stop lever can rotate around the rotating part. The sliding frame is placed on one side of the stop lever. When the stop lever rotates to its limit position in the direction of the sliding frame, the stop top can press against the stop wall. At this time, the unlocking part is at least partially placed in the unlocking channel. When the unlocking end moves along the unlocking channel, it can push the unlocking part away from the unlocking channel. A tension spring, one end of which is attached to the deadbolt and provides tension to the sliding bracket in the direction of the deadbolt.
2. The door lock that automatically locks upon contact with the door as described in claim 1, characterized in that: The linkage rod also has a limiting head, a compression spring abutting against the limiting head, and the compression spring is compressed when the anti-pull lock tongue moves into the housing.
3. The door lock that automatically locks upon contact with the door as described in claim 1, characterized in that: A torsion spring is sleeved on the rotating shaft of the rotating part. The unlocking part protrudes from the plane where the stop lever is located along the thickness direction. One torsion foot of the torsion spring abuts against the unlocking part. When the anti-pull lock tongue moves into the outer shell, the torsion spring is compressed.
4. A door lock that automatically locks upon contact with the door as described in claim 1, characterized in that: It also includes an unlocking link, which can rotate around one end of itself. The sliding frame has an unlocking protrusion. The end of the unlocking link away from its own axis can abut against the unlocking protrusion. When the unlocking link rotates around its own axis, it can pull the deadbolt into the housing through the unlocking protrusion.
5. A door lock that automatically locks upon contact with the door as described in claim 4, characterized in that: It also includes a latch, the outer shell has a latch hole, the latch hole and the latch respectively have a first limiting surface and a second limiting surface, the latch is connected to the latch rod, and the latch can move along the length direction of the latch rod, and when the latch extends out of the latch hole, the latch can rotate around the axial direction of the latch rod.
6. A door lock that automatically locks upon contact with the door as described in claim 5, characterized in that: The locking tongue rod is fitted with a second spring and an unlocking plate. The locking tongue rod has a limiting edge in the radial direction. The two ends of the second spring abut against the unlocking plate and the limiting edge, respectively. A fixing block has a through hole through which the locking tongue rod passes.
7. A door lock that automatically locks upon contact with the door as described in claim 1, characterized in that: It also includes a proximity switch and a signal trigger lever, one end of which has a trigger head that can approach or move away from the contact of the proximity switch, and the sliding frame has a guide slope, with the trigger head corresponding to the guide slope.
8. A door lock that automatically locks upon contact with the door as described in claim 1 or 5, characterized in that: The anti-pull latch has a guide surface at the end away from the linkage rod, and the guide surface is inclined in the direction away from the linkage rod.
9. A door lock that automatically locks upon contact with the door as described in claim 1, characterized in that: It also includes a latch, which has a top surface that corresponds to an anti-pull latch, and the anti-pull latch can abut against the top surface.
10. A door lock that automatically locks upon contact with the door as described in claim 1, characterized in that: It also includes a latch having a deadbolt hole into which the deadbolt bolt can be inserted.