Electric door lock opened by knob at low resistance

Abstract

An electric door lock opened by a knob at low resistance comprises a lock body, a dead bolt, a gear motor, the knob and an unlocking shaft, a dragging body is fixed to the dead bolt, an output gear of the gear motor is provided with a rotary output hole arranged outside a mandrel of the knob in a sleeving mode, and the unlocking shaft can rotate by a locking angle to drive the dragging body to move from a locking position to an unlocking position. The knob rotating shaft is provided with a torsion transmission part inserted into the unlocking shaft, the unlocking shaft is provided with a first torsion hole arranged outside the torsion transmission part in a sleeving mode, a pair of driving shifting blocks are symmetrically arranged on the hole wall of the rotating output hole, and the mandrel is provided with a driven shifting block. The output gear can reversely rotate by a no-load angle after driving the driving shifting block to extrude the driven shifting block to rotate by a locking angle to a locking position, the driven shifting block is separated from the driving shifting block, and the no-load angle is larger than or equal to the locking angle. A user rotates the knob to rotate an unlocking angle which is the same as the locking angle and opposite to the locking angle, and then unlocking can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of locks, in particular to an electric door lock which can be opened with a knob and low resistance. Background Art

[0002] Chinese patent publication number CN219760791U discloses a fully automatic smart lock reduction motor, including an output gear, an output motor, and a gear system. The output gear is provided with a rotating shaft, and the output motor and the output gear are connected by a gear system. The gear system includes a reduction gear unit driven by the output motor and a clutch gear unit driven by the reduction gear unit. The output end of the clutch gear unit can engage or disengage with the output gear through a movable action. The user presses the manual drive member (knob) to compress the clutch spring, and the rotating shaft (unlocking shaft) moves axially along the mating shaft hole to cause the linkage block to exit the linkage groove, thereby allowing the rotating shaft to rotate freely relative to the output gear. At this time, the user can control the lock cylinder to unlock by rotating the rotating shaft while maintaining the pressure.

[0003] In the prior art, pressing down on a knob separates the output teeth from the transmission teeth. Keeping the knob pressed down and rotating it unlocks the lock. The initial process does not require driving the reduction motor. Release the knob, and the clutch spring drives the output teeth into engagement with the transmission teeth. This requires a clutch spring, which is complex and requires a secure installation position, taking up a lot of space. Furthermore, unlocking the lock requires pressing down on the knob, which is inconvenient. Utility Model Content

[0004] The utility model aims to provide an electric door lock which can be opened with a knob at low resistance, does not need to press down the knob to unlock, and does not need to drive a reduction motor to unlock the knob.

[0005] To achieve the above-mentioned purpose, the utility model provides an electric door lock with low resistance opening by a knob, comprising a lock body, a deadbolt, a reduction motor, a knob, an unlocking shaft, and a drag body fixed to the deadbolt. The output gear of the reduction motor is provided with a rotation output hole sleeved outside the core shaft of the knob. The unlocking shaft can rotate the locking angle to drive the drag body to move from a locked position to an unlocked position. The knob shaft is provided with a torque transmission part for inserting the unlocking shaft. The unlocking shaft is provided with a first torque hole sleeved outside the torque transmission part. A pair of active dial heads are symmetrically provided on the hole wall of the rotation output hole. The core shaft is provided with a driven dial head. The output teeth can rotate in the opposite direction by an idle angle after driving the active dial head to squeeze the driven dial head to rotate the locking angle to the locked position. The driven dial head is disengaged from the active dial head, and the idle angle is greater than or equal to the locking angle.

[0006] In one embodiment of the present invention, the lock body is provided with a locking position detection switch and an unlocking position detection switch for detecting whether the unlocking shaft is in the locking position and the unlocking position respectively.

[0007] In one embodiment of the present invention, the locking position detection switch and the unlocking position detection switch are Hall switches, and the unlocking shaft is provided with a first magnet and a second magnet respectively cooperating with the locking position detection switch and the unlocking position detection switch.

[0008] In one embodiment of the present invention, the unlocking shaft is further provided with a second torque hole for connecting to the lock cylinder, and the unlocking shaft is provided with a swing arm for driving the towing body.

[0009] In one embodiment of the present invention, a torsion spring is provided between the swing arm and the lock body, and the elastic force of the torsion spring first increases and then decreases during the process of the unlocking shaft rotating from the locking position to the unlocking position.

[0010] In one embodiment of the utility model, it also includes a lock box that cooperates with the deadbolt, and the lock body is provided with a door closing detection switch for detecting whether the deadbolt is aligned with the first lock hole of the lock box. The door closing detection switch is a Hall switch, and the lock box is provided with a third magnet that cooperates with the door closing detection switch.

[0011] In one embodiment of the present invention, the lock body is further provided with a scissors tongue assembly, and the lock box is provided with a second lock hole corresponding to the scissors tongue assembly.

[0012] In one embodiment of the present invention, the swing arm is threadedly connected with a screw for connecting the torsion spring.

[0013] In an embodiment of the present invention, the driven dial is symmetrically arranged on the core axis, and the knob is axially fixed and rotationally connected to the lock body.

[0014] In one embodiment of the present utility model, the unlocking shaft is provided with a pair of connecting arms for fixing the first magnet and the second magnet, the lock body is provided with a bracket for rotatably connecting the unlocking shaft, the bracket is fixed with a circuit board, the circuit board is provided with the locking position detection switch and the unlocking position detection switch, the circuit board is provided with a photoelectric detection switch for detecting whether the output tooth rotates into position, the gear set of the reduction motor is provided with an identification that cooperates with the detection switch, and the reduction motor is provided with a window corresponding to the identification.

[0015] In the present invention, the user can unlock the vehicle by rotating the knob to an unlocking angle in the opposite direction to the locking angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a structural diagram of the electric door lock in the locked state with the knob opening with low resistance according to the first embodiment of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of hidden lock body and lock box.

[0018] Figure 3 for Figure 2 Exploded diagram.

[0019] Figure 4 for Figure 3 The structure diagram of the knob.

[0020] Figure 5 for Figure 3 Structural diagram of the unlocking axis.

[0021] Figure 6 for Figure 3 Structural diagram of the reduction motor.

[0022] Figure 7 for Figure 1 Schematic diagram of the coordination between the active protrusion and the driven protrusion of the electric door lock that is opened with low resistance by the knob of the reduction motor. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See Figure 1-6 The electric door lock with low resistance opening by a knob of the first embodiment of the present invention includes a lock body 1, a dead bolt 2, a reduction motor 3, a knob 4, an unlocking shaft 5, a scissor tongue assembly 6, and a lock box 7. The dead bolt 2 is fixed with a drag body 21, and the output gear of the reduction motor 3 is provided with a rotation output hole 30 sleeved on the outside of the core shaft 41 of the knob 4. The unlocking shaft 5 can rotate the locking angle to drive the drag body 21 to move from the locked position to the unlocked position. The knob 4 shaft is provided with a torque transmission part 42 for inserting the unlocking shaft 5, and the unlocking shaft 5 is provided with a first torque hole 50 sleeved on the outside of the torque transmission part 42. A pair of active dial heads 301 are symmetrically provided on the hole wall of the rotation output hole 30, and the core shaft 41 is provided with a driven dial head 411. The output teeth can rotate in the opposite direction by an idle angle after driving the active dial head 301 to squeeze the driven dial head 411 to rotate the locking angle to the locked position, and the driven dial head is separated from the active dial head 301. The idle angle of 90° is greater than the locking angle of 86°.

[0025] The lock body 1 is provided with a locking position detection switch and an unlocking position detection switch for detecting whether the unlocking shaft 5 is in the locking position and the unlocking position respectively.

[0026] The lock position detection switch and the unlock position detection switch are Hall switches, and the unlock shaft 5 is provided with a first magnet 5a and a second magnet 5b respectively cooperating with the lock position detection switch and the unlock position detection switch.

[0027] The unlocking shaft 5 is provided with a swing arm 51 for driving the towing body 21 .

[0028] A torsion spring 52 is provided between the swing arm 51 and the lock body 1 . The elastic force of the torsion spring 52 first increases and then decreases when the unlocking shaft 5 rotates from the locked position to the unlocked position.

[0029] It also includes a lock box 7 that cooperates with the deadbolt 2. The lock body 1 is provided with a door closing detection switch for detecting whether the deadbolt 2 is aligned with the first lock hole of the lock box 7. The door closing detection switch is a Hall switch. The lock box 7 is provided with a third magnet 7c that cooperates with the door closing detection switch.

[0030] The lock box 7 is provided with a second lock hole corresponding to the scissors tongue assembly 6 .

[0031] The swing arm 51 is threadedly connected with a screw 511 for connecting the torsion spring 52 .

[0032] The core shaft 41 is symmetrically provided with a driven dial head 411 , and the knob 4 is axially fixed and rotationally connected to the lock body 1 .

[0033] The unlocking shaft 5 is provided with a pair of connecting arms for securing the first and second magnets 5a, 5b. The lock body 1 is provided with a bracket 8 for rotatably connecting the unlocking shaft 5. The bracket 8 is secured with a circuit board 9, which is provided with a lock position detection switch and an unlock position detection switch. The circuit board 9 is also provided with a photoelectric detection switch for detecting whether the output teeth have rotated into position. The gear train of the reduction motor 3 is provided with an identification that mates with the detection switch, and the reduction motor 3 is provided with a window 32 corresponding to the identification. The lock body is provided with an annular recess that allows the connecting arms to rotate. The pair of connecting arms are provided with a torque transmission ring that fits over the unlocking shaft 5. The reduction motor is provided with a cover plate 33 that covers the annular recess 31. The unlocking shaft is provided with a torque transmission portion 52 that is inserted into the torque transmission ring.

[0034] In the present invention, the user can unlock the device by rotating the knob 4 to an unlocking angle in the opposite direction to the locking angle.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric door lock with a low resistance opening knob, comprising a lock body, a deadbolt, a reduction motor, a knob, an unlocking shaft, a deadbolt fixed with a drag body, an output gear of the reduction motor having a rotation output hole sleeved outside the core shaft of the knob, the unlocking shaft being able to rotate through a locking angle to drive the drag body to move from a locked position to an unlocked position, the knob shaft having a torque transmission portion into which the unlocking shaft is inserted, the unlocking shaft having a first torque hole sleeved outside the torque transmission portion, characterized in that: A pair of active dial heads are symmetrically provided on the wall of the rotary output hole, and a driven dial head is provided on the core shaft. The output teeth can rotate in the opposite direction by an idle angle after driving the active dial head to squeeze the driven dial head to rotate the locking angle to the locking position, and the driven dial head is separated from the active dial head, and the idle angle is greater than or equal to the locking angle.

2. The electric door lock with low resistance opening by knob according to claim 1, characterized in that: The lock body is provided with a locking position detection switch and an unlocking position detection switch for detecting whether the unlocking shaft is in the locking position and the unlocking position respectively.

3. The electric door lock with low resistance opening by a knob according to claim 2, characterized in that: The locking position detection switch and the unlocking position detection switch are Hall switches, and the unlocking shaft is provided with a first magnet and a second magnet respectively cooperating with the locking position detection switch and the unlocking position detection switch.

4. The electric door lock with low resistance opening by a knob according to claim 3, characterized in that: The unlocking shaft is provided with a swing arm for driving the towing body.

5. The electric door lock with low resistance opening by a knob according to claim 4, characterized in that: A torsion spring is provided between the swing arm and the lock body. The elastic force of the torsion spring first increases and then decreases when the unlocking shaft rotates from the locking position to the unlocking position.

6. The electric door lock with low resistance opening by a knob according to claim 5, characterized in that: It also includes a lock box that cooperates with the deadbolt, and the lock body is provided with a door closing detection switch for detecting whether the deadbolt is aligned with the first lock hole of the lock box. The door closing detection switch is a Hall switch, and the lock box is provided with a third magnet that cooperates with the door closing detection switch.

7. The electric door lock with low resistance opening by a knob according to claim 6, characterized in that: The lock body is further provided with a scissors tongue assembly, and the lock box is provided with a second lock hole corresponding to the scissors tongue assembly.

8. The electric door lock with low resistance opening by a knob according to claim 7, characterized in that: The swing arm is threadedly connected with a screw for connecting the torsion spring.

9. The electric door lock with low resistance opening by a knob according to claim 8, characterized in that: The driven dial is symmetrically arranged on the core shaft, the knob is axially fixed and rotationally connected to the lock body, the unlocking shaft is provided with a pair of connecting arms for fixing the first magnet and the second magnet, the lock body is provided with an annular recess allowing the connecting arms to rotate, the pair of connecting arms is provided with a torque transmission ring sleeved outside the unlocking shaft, the reduction motor is provided with a cover plate for covering the annular recess, and the unlocking shaft is provided with a torque transmission part inserted into the torque transmission ring.

10. The electric door lock with low resistance opening by a knob according to claim 9, characterized in that: The lock body is provided with a bracket for rotatably connecting the unlocking shaft, the bracket is fixed with a circuit board, the circuit board is provided with the locking position detection switch, the unlocking position detection switch, and the door closing position detection switch, the circuit board is provided with a photoelectric detection switch for detecting whether the output tooth has rotated into position, the gear set of the reduction motor is provided with an identification that cooperates with the detection switch, and the reduction motor is provided with a window corresponding to the identification.

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