Back locking structure of door lock
By designing an anti-lock structure in the door lock with the handle rotating core driving the square tongue extending out of the lock shell and driving the anti-lock plate to slide through the fork, the problem of the existing anti-lock structure of the door lock is too simple, and the safety and reliability of people outside the door can unlock the lock by themselves.
Patent Information
- Application Number
- CN202421429073.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The anti-locking structure of the existing door lock is too simple, and it is easy to cause the door lock to be in an anti-locking state due to unintentional operation, thereby preventing personnel outside the door from unlocking the lock and entering the door by themselves.
A counter-locking structure for door locks is designed, which drives the square tongue to extend out of the lock shell through the handle core, and drives the counter-locking plate to slide downward through the fork to prevent the square tongue from retracting back into the lock shell, thereby realizing counter-locking. This structure requires the personnel inside the door to lift the door handle first, so that the square tongue extends out of the lock shell, and then rotate the anti-lock knob to drive the anti-lock plate to slide in order to complete the anti-lock operation.
It effectively avoids the door lock error caused by unintentional operation, ensures that people outside the door can unlock the door by themselves, and improves the safety and reliability of the door lock.
Smart Images
Figure CN222686385U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door locks, and more specifically, it relates to a deadbolt structure for a door lock. Background Technology
[0002] To control entry and exit, a door lock device capable of performing a locking function is installed on the door leaf; the door lock device includes a lock shell installed on the door leaf and a latch and a square latch installed in the lock shell; the door is locked or unlocked by turning the door handles located on the inside and outside of the door leaf respectively; in order to prevent people outside the door from unlocking the door through the door handle on the outside of the door leaf, the door lock needs to be locked by a deadbolt structure.
[0003] The existing door lock's deadbolt mechanism allows people inside the door to simply turn the deadbolt knob to engage the deadbolt plate and lock the door. This operation is too simple, making it easy for children inside to accidentally turn the deadbolt knob while the door is locked, thus preventing people outside from unlocking the door and entering. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a deadbolt structure for a door lock.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] A deadbolt structure for a door lock includes a lock housing, on one side of which a bolt and a square bolt are slidably disposed; a handle core connected to a door handle is rotatably disposed inside the lock housing, and the handle core drives the square bolt to extend out of the lock housing via a transmission assembly.
[0007] A deadbolt plate is slidably provided behind the square tongue to prevent the square tongue from retracting into the lock case. The upper end of the deadbolt plate has a deadbolt end protruding towards the square tongue side. The deadbolt end abuts against the upper end surface of the square tongue. The lower end of the deadbolt plate cooperates with a fork rotatably mounted on the lock case.
[0008] After the handle core drives the square tongue to extend out of the lock housing, the shift fork drives the anti-lock plate to slide downward, so that the anti-lock end of the anti-lock plate is placed behind the square tongue, so as to prevent the square tongue from retracting into the lock housing and realize anti-locking.
[0009] The present invention further includes: a limiting hole is provided on the anti-lock plate, and a limiting component is provided on the lock housing;
[0010] The limiting member is placed inside the limiting hole to restrict the distance the anti-lock plate slides up and down.
[0011] The present invention further includes: a mating groove is provided at the lower end of the anti-locking plate facing the shift fork, and the shift rod of the shift fork is placed in the mating groove to push the anti-locking plate to slide up and down.
[0012] The present invention further includes: the transmission assembly includes an active plate whose upper end is connected to the handle core and a linkage component rotatably mounted on the lock housing; the upper end of the linkage component is hinged to the lower end of the active plate, and a linkage shaft is provided at the end facing the square tongue.
[0013] The connecting plate behind the square tongue has an inclined linkage hole, and the linkage shaft is placed in the linkage hole; the handle rotating core drives the linkage plate to rotate through the active plate, and the linkage shaft on the linkage plate pushes the square tongue out of the lock case.
[0014] The present invention further provides that: the upper and lower ends of the linkage hole are respectively provided with a locking positioning groove and an unlocking positioning groove, and the linkage shaft is placed in the locking positioning groove or the unlocking positioning groove, so that the square tongue is stably in the locked or unlocked position.
[0015] The present invention further includes: a guide hole is provided on the connecting plate along the sliding direction of the square tongue, and the rotating shaft on the linkage plate is placed in the guide hole to guide the square tongue to extend out of the lock housing.
[0016] The beneficial effects of this utility model are as follows: When the square latch of this utility model is not extended from the lock housing, the deadbolt end of the deadbolt plate abuts against the upper surface of the square latch. When the door lock needs to be deadbolted, the door handle must be lifted in reverse first, causing the handle to rotate. The rotating handle drives the square latch to extend from the lock housing through a transmission component. Then, the shift fork (connected to the deadbolt knob inside the door) is rotated, causing the deadbolt plate to slide downwards, placing the deadbolt end of the deadbolt plate behind the square latch to prevent the square latch from retracting into the lock housing, thus achieving deadbolt locking. When people inside the door need to deadbolt the door lock, they must first lift the door handle in reverse to extend the square latch from the lock housing before rotating the deadbolt knob to slide the deadbolt plate and achieve deadbolt locking. This prevents children inside the room from accidentally deadbolting the door lock by directly rotating the deadbolt knob, thus preventing the problem of children accidentally deadbolting the door lock. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a diagram showing the unlocking state of the deadbolt structure of a door lock according to this utility model;
[0018] Figure 2 This is a diagram showing the deadbolt state of a door lock deadbolt structure according to the present invention;
[0019] Figure 3 This is a diagram showing the fit between the square latch and the transmission component of the deadbolt structure of a door lock according to this utility model.
[0020] Figure 4 This is a schematic diagram of the square latch structure of the deadbolt structure of a door lock according to this utility model;
[0021] Figure 5 This is a diagram showing the fit between the square tongue and the deadbolt plate of a door lock's deadbolt structure according to this utility model;
[0022] Figure 6 This is a diagram showing the fit between the handle rotor and the transmission assembly of a door lock's deadbolt structure according to this utility model.
[0023] Explanation of reference numerals in the attached drawings: 1. Lock housing; 11. Limiting component; 2. Slanted latch; 3. Square latch; 31. Connecting plate; 311. Linkage hole; 3111. Locking positioning groove; 3112. Unlocking positioning groove; 4. Handle rotating core; 5. Transmission assembly; 51. Drive plate; 52. Linkage component; 521. Rotating shaft; 522. Linkage shaft; 6. Reverse lock plate; 61. Reverse lock end; 62. Mating groove; 63. Limiting hole; 7. Shift fork; 71. Shift lever. DETAILED DESCRIPTION
[0024] See attached document Figures 1 to 6 The present invention provides a more detailed description of the deadbolt structure of a door lock.
[0025] A deadbolt structure for a door lock includes a lock housing 1, on one side of which a bolt 2 and a square bolt 3 are slidably disposed; a handle core 4 connected to a door handle is rotatably disposed inside the lock housing 1, and the handle core 4 drives the square bolt 3 to extend out of the lock housing 1 through a transmission assembly 5; (in order to unlock the door lock, the lock housing 1 is also provided with an unlocking structure that drives the bolt 2 and the square bolt 3 to retract into the lock housing 1).
[0026] A deadbolt plate 6 is slidably disposed behind the square tongue 3 to prevent the square tongue 3 from retracting into the lock housing 1. The upper end of the deadbolt plate 6 has a deadbolt end 61 protruding towards the square tongue 3. The deadbolt end 61 abuts against the upper end surface of the square tongue 3. The lower end of the deadbolt plate 6 cooperates with the shift fork 7 rotatably disposed on the lock housing 1. After the handle core 4 drives the square tongue 3 to extend out of the lock housing 1, the shift fork 7 drives the deadbolt plate 6 to slide downward, so that the deadbolt end 61 of the deadbolt plate 6 is placed behind the square tongue 3 to prevent the square tongue 3 from retracting into the lock housing 1, thereby achieving deadbolt locking.
[0027] When the square latch 3 of this door lock is not extended from the lock housing 1, the deadbolt end 61 of the upper end of the deadbolt plate 6 abuts against the upper surface of the square latch 3. When the door lock needs to be deadbolted, the door handle must be lifted in reverse first, which drives the handle core 4. The handle core 4 drives the square latch 3 to extend from the lock housing 1 through the transmission component 5. Then, the shift fork 7 (which is connected to the deadbolt knob inside the door) is rotated. The shift fork 7 drives the deadbolt plate 6 to slide downward, so that the deadbolt end 61 of the deadbolt plate 6 is placed behind the square latch 3, so as to prevent the square latch 3 from retracting into the lock housing 1, thus achieving deadbolt locking. When people inside the door need to deadbolt the door lock, they must first lift the door handle in reverse to allow the square latch 3 to extend from the lock housing 1 before rotating the deadbolt knob to drive the deadbolt plate 6 to slide and achieve deadbolt locking. This is to prevent children inside the room from accidentally deadbolting the door lock by directly rotating the deadbolt knob, thus preventing the problem of children inside the room accidentally deadbolting the door lock.
[0028] The deadbolt plate 6 has a limiting hole 63, and the lock housing 1 has a limiting member 11. The limiting member 11 is placed in the limiting hole 63 to limit the vertical sliding distance of the deadbolt plate 6, thereby improving the stability of the door lock structure. The lower end of the deadbolt plate 6 has a mating groove 62 facing the fork 7. The lever 71 of the fork 7 is placed in the mating groove 62. When the deadbolt knob drives the fork 7 to rotate counterclockwise, the lever 71 abuts against the bottom wall of the mating groove 62 and pushes the deadbolt plate 6 to slide downward, so that the deadbolt end 61 is placed behind the square tongue 3, locking the square tongue 3. When the deadbolt knob drives the fork 7 to rotate clockwise, the lever 71 abuts against the upper wall of the mating groove 62 and pushes the deadbolt plate 6 to slide upward, releasing the locking of the square tongue 3.
[0029] The transmission assembly 5 includes an active plate 51 connected to the upper end of the handle rotating core 4 and a linkage member 52 rotatably mounted on the lock housing 1. The upper end of the linkage member 52 is hinged to the lower end of the active plate 51, and a linkage shaft 522 is provided at the end facing the square tongue 3. The hinge hole on the lower end of the active plate 51 is larger than the hinge shaft on the linkage member 52, so that when the active plate 51 swings with the handle rotating core 4, it can drive the linkage member 52 to rotate, avoiding interference. A linkage hole 311 is obliquely opened on the connecting plate 31 behind the square tongue 3, and the linkage shaft 522 is placed in the linkage hole 311. The handle rotating core 4 drives the linkage member 52 to rotate through the active plate 51. During the rotation of the linkage member 52, the linkage shaft 522 slides along the linkage hole 311. During this process, the linkage shaft 522 pushes the square tongue 3 out of the lock housing 1 by pushing the hole wall of the linkage hole 311, locking the door leaf with the lock installed on it to the door frame.
[0030] The upper and lower ends of the linkage hole 311 are respectively provided with a locking positioning groove 3111 and an unlocking positioning groove 3112. The linkage shaft 522 is placed in the locking positioning groove 3111 or the unlocking positioning groove 3112, so that the square tongue 3 is stably in the locked or unlocked position, thereby improving the stability of the door lock.
[0031] The connecting plate 31 has a guide hole along the sliding direction of the square tongue 3. The rotating shaft 521 on the linkage plate is placed in the guide hole to guide the square tongue 3 to extend out of the lock shell 1. That is, the front end of the square tongue 3 is in the square tongue 3 hole on the lock shell 1, and the rear end of the connecting plate 31 extends and retracts on the lock shell 1 under the guidance of the rotating shaft 521, so as to avoid deviation of the square tongue 3 during the sliding process.
[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.
Claims
1. A reverse locking structure of a door lock, comprising a lock housing, one side of which is slidably provided with an oblique tongue and a square tongue; wherein: A handle core connected to the door handle is rotatably arranged in the lock housing, and the handle core drives the square tongue to extend out of the lock housing through a transmission assembly; A counter-lock plate capable of preventing the square tongue from retracting into the lock housing is slidably arranged at the rear of the square tongue, and a counter-lock end portion is protruded toward one side of the square tongue at the upper end portion of the counter-lock plate, and the counter-lock end portion abuts against the upper end surface of the square tongue, and the lower end portion of the counter-lock plate cooperates with a shift fork rotatably arranged on the lock housing; After the handle turns to drive the square tongue out of the lock housing, the shift fork drives the anti-lock plate to slide downward, so that the anti-lock end of the anti-lock plate is placed behind the square tongue to prevent the square tongue from retracting into the lock housing, thereby achieving anti-locking.
2. The anti-locking structure of a door lock according to claim 1 is characterized in that: The anti-locking plate is provided with a limiting hole, and the lock housing is provided with a limiting piece; The limiting member is placed in the limiting hole to limit the distance that the anti-locking plate slides up and down.
3. The anti-locking structure of a door lock according to claim 2 is characterized in that: A matching groove is provided at the lower end of the anti-locking plate toward one side of the shift fork, and a shift rod of the shift fork is placed in the matching groove to push the anti-locking plate to slide up and down.
4. The anti-locking structure of a door lock according to claim 1, 2 or 3, characterized in that: The transmission assembly includes an active plate whose upper end is connected to the handle rotating core and a linkage member rotatably arranged on the lock housing, wherein the upper end of the linkage member is hinged to the lower end of the active plate, and a linkage shaft is arranged at one end facing the square tongue; A linkage hole is obliquely opened on the connecting plate behind the square tongue, and the linkage shaft is placed in the linkage hole; the handle rotating core drives the linkage plate to rotate through the active plate, and the linkage shaft on the linkage plate pushes the square tongue out of the lock housing.
5. The anti-locking structure of a door lock according to claim 4 is characterized in that: The upper and lower ends of the linkage hole are respectively provided with a locking positioning groove and an unlocking positioning groove, and the linkage shaft is placed in the locking positioning groove or the unlocking positioning groove, so that the square tongue is stably in a locked or unlocked position.
6. The anti-locking structure of a door lock according to claim 4 is characterized in that: A guide hole is provided on the connecting plate along the sliding direction of the square tongue, and the rotating shaft on the linkage plate is placed in the guide hole to guide the square tongue to extend out of the lock housing.