Small-angle unlocking mechanism for door lock

Abstract

The utility model relates to a small angle unlocking mechanism for a door lock, which comprises a lock seat, a handle and a lock cylinder, the handle is rotatably mounted on the lock seat and drives the lock cylinder to lock or unlock through a transmission mechanism, the transmission mechanism comprises a driving shaft and a driven gear, the driving shaft penetrates through the lock seat and is linked with the lock cylinder, and the driven gear is arranged outside the driving shaft and is linked with the driving shaft. One end, corresponding to the lock seat, of the handle is provided with a gear moving piece moving along with the handle, the gear moving piece is provided with a transmission gear in meshing transmission with the driven gear, the driven gear is driven to rotate by rotating the handle, the lock cylinder is linked to achieve locking or unlocking, and the gear speed ratio of the driven gear to the gear moving piece is 2-10. According to the technical scheme, through meshing transmission between the gear moving piece at the handle end and the driven gear on the lock base, by means of the change of the gear speed ratio, locking or unlocking action of the lock cylinder can be achieved by rotating the handle by a small angle, and the user experience and the unlocking efficiency under the emergency situation are improved.

Description

Technical Field

[0001] The utility model relates to the field of door locks, in particular to a small-angle unlocking mechanism for door locks. Background Art

[0002] With the continuous improvement of people's living standards, doors are designed in various styles, such as casement, sliding, etc. Doors require handles in various processes. The handle is a device installed on the door that has the function of fastening after opening and closing. In order to make the furniture more integrated, the hidden handle makes the door lock more beautiful.

[0003] A Chinese utility model patent, publication number CN209761016U, discloses a hidden handle comprising: a mounting base, a handle assembly connected to the mounting base, a transmission assembly connected to the mounting base, and a reset assembly connected to the mounting base and the transmission assembly, respectively; a receiving groove provided on the mounting base; the handle assembly mounted in the receiving groove; the handle assembly comprising a handle, a rotating block pivotally connected to the handle, and an elastic element connecting the handle and the rotating block, respectively; the transmission assembly comprising a ratchet connected to the rotating block, and a locking frame connected to the ratchet; the locking frame movably disposed on one side of the mounting base. The hidden handle is configured to open by rotating the handle to drive the locking frame, and then reset the locking frame by the reset assembly, thereby automatically returning the handle to its initial position, preventing the handle from remaining in a tilted state after opening; the handle is simultaneously received in the receiving groove, and the elastic element ensures that the handle, once returned to its initial position, automatically enters the receiving groove, effectively preventing the hidden handle from colliding with the outside world and being damaged.

[0004] However, in the above structure, when using the handle, it is necessary to first remove the handle in the mounting seat with one finger and then turn the handle to open the door. The unlocking method steps of the entire process are reversed, and it needs to be rotated 90 degrees to unlock, which makes it difficult to unlock in an emergency. The lock body is also cumbersome and slow to unlock, and the connection between the lock body structures is not firm enough. Long-term use can easily cause the handle to protrude and collide with the user, shortening the service life of the handle. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a small-angle unlocking mechanism for a door lock in view of the deficiencies of the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a small-angle unlocking mechanism for a door lock, comprising a lock seat, a handle and a lock core. The handle is rotatably mounted on the lock seat and drives the lock core to lock or unlock through a transmission mechanism. The transmission mechanism comprises a drive shaft passing through the lock seat and linked with the lock core, and a driven gear arranged outside the drive shaft and linked with the drive shaft. The end of the handle corresponding to the lock seat is provided with a geared member that moves with the handle. The geared member is provided with transmission teeth that mesh with the driven gear, and the driven gear is driven to rotate by rotating the handle, thereby locking or unlocking the lock core. The gear speed ratio of the driven gear to the geared member is 2-10.

[0007] With the above technical solution, a gear ratio of 2-10 means that the gear ratio of the driven gear to the geared member is between 2:1-10:1, and the preferred gear ratio is 6:1. For example, the number of teeth on the driven gear is 48, and the number of teeth on the geared member is set to 8. Through a specific transmission mechanism design, that is, the meshing transmission between the geared member at the handle end and the driven gear on the lock seat, the differential gear ratio is utilized, so that the lock cylinder can be locked or unlocked by rotating the handle at a smaller angle, thereby improving user experience and unlocking efficiency in emergency situations.

[0008] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: the transmission mechanism also includes an inner baffle covering the outside of the driven gear and the geared member, and the inner baffle cooperates with the lock seat to form a transmission space for the driven gear and the geared member to rotate.

[0009] By adopting the above technical solution, the design of the inner baffle not only protects the driven gear and the geared part, but also forms a closed space with the lock seat, preventing external factors from affecting the transmission efficiency and accuracy, avoiding shaking during the transmission process of the driven gear and the geared part, extending the service life and improving stability.

[0010] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: a plurality of first rolling cavities are provided at one end of the geared part corresponding to the lock seat, a first rolling ball is provided in the first rolling cavity, and a first arc-shaped rolling groove is provided on the lock seat along the rotation trajectory of the geared part, the first rolling ball is rolled in the first arc-shaped rolling groove, and the geared part slides along the first arc-shaped rolling groove through the first rolling ball.

[0011] By adopting the above technical solution, a first rolling cavity is designed on the gear member, and a corresponding first arc-shaped rolling groove is opened on the lock seat. The rolling balls are used to roll in the groove to achieve a low-friction transmission method, reduce wear and improve transmission efficiency.

[0012] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: a plurality of second rolling cavities are provided at one end of the geared part corresponding to the inner baffle plate, a second rolling ball is provided in the second rolling cavity, and a second arc-shaped rolling groove is provided on the inner baffle plate along the rotation trajectory of the geared part, the second rolling ball is rolled in the second arc-shaped rolling groove, and the geared part slides along the second arc-shaped rolling groove through the second rolling ball.

[0013] By adopting the above technical solution, a rolling friction mechanism is also set up between the gear part and the inner baffle. Through the design of the second rolling cavity and the second arc-shaped rolling groove, the rolling of the second rolling ball is utilized to reduce direct contact and friction, thereby improving the reliability and durability of the mechanism. Both ends of the gear part are set to rolling friction, thereby improving the transmission efficiency.

[0014] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: a pre-tightening spring is provided in the second rolling cavity and / or the first rolling cavity to push the second rolling ball and / or the first rolling ball against the inner baffle and / or the lock seat.

[0015] By adopting the above technical solution, the setting of the preload spring maintains a certain preload force between the rolling ball and the rolling groove, reducing the gap and vibration, thereby improving the smoothness and reliability of the transmission, ensuring that the appropriate contact pressure is maintained between the rolling ball and the rolling groove, improving the stability and accuracy of the transmission, and preventing the handle from sagging and shaking.

[0016] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: the driving shaft is a square shaft, a driven roller is connected to the outer surface of the square shaft, and the driven gear is arranged on the driven roller.

[0017] By adopting the above technical solution, the driving shaft is designed as a square shaft, and the driven roller is externally connected, and the driven gear is set on the driven roller. This design not only simplifies the structure, but also improves the transmission efficiency and the compactness of the overall mechanism.

[0018] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: a reset mechanism is provided between the handle and the lock seat, the reset mechanism includes a reset boss arranged on the lock seat, a reset arc groove opened in the reset boss, a plurality of reset springs arranged in the reset arc groove, and a reset toggle member arranged at one end of the handle corresponding to the reset boss, the reset toggle member is inserted in the reset arc groove, and when the reset toggle member slides along the reset arc groove, it drives the reset spring to deform.

[0019] Using the above technical solution, the reset mechanism consists of a reset boss, a reset arc groove, a reset spring and a reset toggle piece. The handle drives the reset toggle piece to slide in the reset arc groove to achieve automatic reset of the handle, ensuring that the handle can automatically return to its initial position after completing the unlocking action.

[0020] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: the reset arc groove includes a static part arranged in the middle and reset parts arranged at both ends of the static part, and the reset part is provided with a spring step corresponding to the static part, and the reset springs are respectively arranged in the reset parts at both ends and resist the spring steps.

[0021] Using the above technical solution, the design of the reset arc groove includes a static part and reset parts at both ends, as well as a spring step arranged in the reset part. This structure effectively supports the reset spring, improves the stability and durability of the reset mechanism, and can reset the handle both when it is pressed down and lifted up.

[0022] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: the inner baffle cover is arranged on the reset arc groove, and a yield groove is opened at one end corresponding to the static part.

[0023] By adopting the above technical solution, a give way groove is opened at one end of the inner baffle corresponding to the static part of the reset arc groove to ensure that the inner baffle does not hinder the sliding of the reset toggle member during the handle reset process, thereby ensuring the normal operation of the reset mechanism, ensuring the coordinated operation of the inner baffle and the reset mechanism, avoiding the inner baffle from interfering with the reset mechanism, and avoiding the reset spring from falling out, thereby improving assembly efficiency.

[0024] The above-mentioned small-angle unlocking mechanism for a door lock can be further configured as follows: positioning protrusions are provided at both ends of the reset boss, a positioning groove adapted to the positioning protrusion is provided on the inner baffle, the inner baffle is connected to the lock seat through fasteners, and a shaft sleeve for the driven gear to rotate is provided at the corresponding driven gear.

[0025] By adopting the above technical solution, the connection stability between the inner baffle and the lock seat is improved through the cooperation of the positioning protrusion and the positioning groove, and the use of fasteners; a shaft sleeve is set at the driven gear to reduce friction, ensure smooth rotation of the gear, and improve the transmission efficiency and reliability of the overall mechanism.

[0026] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of embodiment 1 of the present utility model.

[0028] Figure 2 This is an exploded view of Example 1 of the utility model with the handle removed.

[0029] Figure 3 This is an exploded view of Example 1 of the utility model with the handle removed.

[0030] Figure 4This is a three-dimensional schematic diagram of Example 1 of the utility model without the handle.

[0031] Figure 5 This is a cross-sectional schematic diagram of Example 1 of the present utility model.

[0032] Figure 6 This is a schematic diagram of the lock core structure of Example 1 of the present utility model.

[0033] Figure 7 This is a schematic diagram of the lock core structure of Example 2 of the present utility model. Implementation Method

[0034] like Figures 1-6 As shown, a small-angle unlocking mechanism for a door lock includes a lock seat 1, a handle 2 and a lock cylinder 3. The lock seat 1 is provided with an arcuate convex surface 11, and the handle 2 is provided with an arcuate concave surface 21 that rotates in conjunction with the arcuate convex surface. The handle 2 is rotatably installed on the lock seat 1 and drives the lock cylinder 3 to lock or unlock through a transmission mechanism. The transmission mechanism includes a square shaft 4 that is passed through the lock seat 1 and is linked to the lock cylinder 3, and a driven roller 5 that is provided outside the square shaft 4 and is linked to the square shaft 4. The driven roller 5 is provided with a driven gear 51 that rotates therewith. One end of the handle 2 corresponding to the lock seat 1 is provided with a toothed member 6 that rotates with the handle 2. One end of the toothed member 6 is fixedly connected to the handle 2 through a handle mounting seat 61. One end is provided with a transmission tooth 62 that meshes with the driven gear 51, and the driven gear 51 is driven to rotate by rotating the handle 2, and the lock cylinder 3 is linked to achieve locking or unlocking. The tooth speed ratio of the driven gear 51 and the geared member 6 is X, 2<X<10. For example, when the square shaft 4 in the lock cylinder 3 needs to be rotated 45° to unlock, X≈6. At this time, the number of teeth on the driven gear can be set to 48, and the number of teeth on the geared member can be set to 8. The handle 2 only needs to be rotated more than 8° to unlock. There are also some lock cylinders 3 whose square shaft 4 is rotated 90° to unlock. At this time, X is set to 9, and the handle 2 only needs to be rotated more than 10° to unlock, thereby realizing a convenient unlocking method and improving user experience.

[0035] like Figure 1-Figure 3As shown, the transmission mechanism also includes an inner baffle 7 that is covered outside the driven gear 51 and the gear member 6. The inner baffle 7 cooperates with the lock seat 1 to form a transmission space A for the driven gear 51 and the gear member 6 to rotate. The gear member 6 is provided with two first rolling cavities 64 at one end corresponding to the lock seat 1. The first rolling balls 65 are provided in the first rolling cavities 64. The lock seat 1 is provided with a first arc-shaped rolling groove 12 that is arranged along the rotation trajectory of the gear member 6. The first rolling balls 65 are arranged to roll in the first arc-shaped rolling groove 12, and the gear member 6 is moved along the first arc through the first rolling balls 65. shaped rolling groove 12 slides, and a second rolling cavity 66 is provided at one end of the gearing 6 corresponding to the inner baffle 7. The second rolling cavity 66 is arranged between the two first rolling cavities 64, and is provided with a preload spring 67 and a second rolling ball 68. A second arc-shaped rolling groove 71 arranged along the rotation trajectory of the gearing 6 is opened on the inner baffle 7. One end of the preload spring 67 is against the gearing 6, and the other end pushes the second rolling ball 68 to roll in the second arc-shaped rolling groove 71, and makes the gearing 6 slide along the second arc-shaped rolling groove 71 through the second rolling ball 68.

[0036] like Figure 1-Figure 5 As shown, a reset mechanism is provided between the handle 2 and the lock seat 1, and the reset mechanism includes a reset boss 13 provided on the lock seat 1, a reset arc groove provided in the reset boss 13, two reset springs 14 provided in the reset arc groove, and a reset toggle 22 provided at one end of the handle 2 corresponding to the reset boss 13, the reset arc groove includes a static portion 131 provided in the middle and reset portions 132 provided at both ends of the static portion 131, the reset portion 132 is provided with a spring step 133 at the static portion 131, and the reset springs 14 are respectively provided at the reset portions 131 at both ends. 32, and against the spring step 133, the reset toggle 22 is inserted in the stationary part 131, and when the reset toggle 22 slides along the reset arc groove, it drives the reset spring 14 to deform, the inner baffle 7 is covered on the reset arc groove, and a give way groove 72 is provided at one end corresponding to the stationary part 131, and positioning protrusions 134 are provided at both ends of the reset boss 13. A positioning groove 73 adapted to the positioning protrusion 134 is provided on the inner baffle 7. The inner baffle 7 is connected to the lock seat 1 by a screw 74, and a shaft sleeve 75 for rotating the driven gear 51 is provided at the corresponding driven gear 51.

[0037] Example 1: Figures 1-6 As shown, when the small-angle unlocking mechanism of the present invention is used on a magnetic lock, the structure of the lock core 3 is shown in FIG. Figure 6The square shaft 4 is inserted into the rotating wheel 31 of the lock cylinder 3. When the square shaft 4 rotates, the shift block 311 on the rotating wheel 31 rotates, so that the shift block 311 drives the linkage plate 32 to move backward, and the linkage magnet 33 retracts the lock cylinder 3 to unlock. Preferably, an anti-lock structure 34 can be provided on the lock seat 1, the handle 2 and the lock cylinder 3 to keep the lock cylinder 3 in the unlocked or locked state, and can serve as the rotation fulcrum of the handle 2 in turn to improve stability. At this time, the lock cylinder of the magnetic lock only needs 45° to unlock, and the gear ratio of the driven gear 51 and the geared part 6 is set to about 6. At this time, the handle 2 only needs to be rotated more than 8° to unlock, thereby achieving convenient and fast unlocking.

[0038] Example 2: Figure 7 As shown, when the small-angle unlocking mechanism of the present invention is used on a flat door lock, the structure of the lock core 3 is shown in FIG. Figure 7 The square shaft 4 is inserted into the rotating wheel 31 of the lock cylinder 3. When the square shaft 4 rotates, the lever 312 on the rotating wheel 31 is linked to rotate, so that the lever 312 drives the lock tongue 35 to move backward, and the lock tongue 35 retracts into the lock cylinder 3 and is unlocked. At this time, the lock cylinder of the magnetic lock only needs 45° to unlock, and the gear ratio of the driven gear 51 and the geared member 6 is set to about 3. At this time, the handle 2 only needs to be rotated more than 15° to unlock, thereby achieving convenient and fast unlocking.

Claims

1. A small-angle unlocking mechanism for a door lock, comprising a lock base, a handle, and a lock cylinder. The handle is rotatably mounted on the lock base and drives the lock cylinder to lock or unlock via a transmission mechanism. The invention is characterized in that: The transmission mechanism includes a drive shaft passing through the lock seat and linked to the lock cylinder, and a driven gear arranged outside the drive shaft and linked to the drive shaft. The end of the handle corresponding to the lock seat is provided with a geared member that moves with the handle. The geared member is provided with transmission teeth that mesh with the driven gear, and the driven gear is rotated by rotating the handle to lock or unlock the lock cylinder. The gear speed ratio of the driven gear to the geared member is 2-10.

2. The small-angle unlocking mechanism for a door lock according to claim 1, characterized in that: The transmission mechanism further comprises an inner baffle plate which is arranged outside the driven gear and the gear member, and the inner baffle plate cooperates with the lock seat to form a transmission space for the driven gear and the gear member to rotate.

3. The small-angle unlocking mechanism for a door lock according to claim 2, characterized in that: The geared part is provided with a plurality of first rolling cavities at one end corresponding to the lock seat, and a first rolling ball is provided in the first rolling cavity. The lock seat is provided with a first arc-shaped rolling groove arranged along the rotation trajectory of the geared part, and the first rolling ball is arranged to roll in the first arc-shaped rolling groove, and the geared part slides along the first arc-shaped rolling groove through the first rolling ball.

4. The small-angle unlocking mechanism for a door lock according to claim 3, characterized in that: The gear-moving part is provided with a plurality of second rolling cavities at one end corresponding to the inner baffle plate, and a second rolling ball is provided in the second rolling cavity. The inner baffle plate is provided with a second arc-shaped rolling groove arranged along the rotation trajectory of the gear-moving part, and the second rolling ball is arranged to roll in the second arc-shaped rolling groove, and the gear-moving part slides along the second arc-shaped rolling groove through the second rolling ball.

5. The small-angle unlocking mechanism for a door lock according to claim 4, characterized in that: A preload spring is provided in the second rolling cavity and / or the first rolling cavity to push the second rolling ball and / or the first rolling ball against the inner baffle and / or the lock seat.

6. A small-angle unlocking mechanism for a door lock according to any one of claims 1 to 5, characterized in that: The driving shaft is a square shaft, a driven roller is connected to the outer surface of the square shaft, and the driven gear is arranged on the driven roller.

7. A small-angle unlocking mechanism for a door lock according to any one of claims 2 to 5, characterized in that: A reset mechanism is provided between the handle and the lock seat, and the reset mechanism includes a reset boss provided on the lock seat, a reset arc groove provided in the reset boss, a plurality of reset springs provided in the reset arc groove, and a reset toggle member provided at one end of the handle corresponding to the reset boss. The reset toggle member is inserted in the reset arc groove, and when the reset toggle member slides along the reset arc groove, it drives the reset spring to deform.

8. The small-angle unlocking mechanism for a door lock according to claim 7, characterized in that: The reset arc groove includes a static portion arranged in the middle and reset portions arranged at both ends of the static portion. The reset portion is provided with spring steps corresponding to the static portion. The reset springs are respectively arranged in the reset portions at both ends and abut against the spring steps.

9. The small-angle unlocking mechanism for a door lock according to claim 8, characterized in that: The inner baffle cover is arranged on the reset arc groove, and a yield groove is opened at one end corresponding to the static part.

10. The small-angle unlocking mechanism for a door lock according to claim 9, characterized in that: Positioning protrusions are provided at both ends of the reset boss, and positioning grooves adapted to the positioning protrusions are opened on the inner baffle. The inner baffle is connected to the lock seat through fasteners, and a shaft sleeve for the driven gear to rotate is provided at the corresponding driven gear.

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