CN217950034U

CN217950034U - Door lock device and anti-theft door

Info

Publication number: CN217950034U
Application number: CN202221434600.5U
Authority: CN
Inventors: 程海涛; 蔡芳亮
Original assignee: Ningbo Bull Intelligent Technology Co ltd
Current assignee: Ningbo Bull Intelligent Technology Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-12-02
Anticipated expiration: 2032-06-08

Abstract

The utility model provides a door lock device and burglary-resisting door belongs to the tool to lock field. The door lock device comprises a lock body, a transmission part, a magnetic part, a driving mechanism, a magnetic-sensing angle sensor and a controller; the first end of the transmission piece is connected with the lock body, and the magnetic piece is positioned at the second end of the transmission piece; the driving mechanism is connected with the transmission piece and is used for driving the transmission piece to rotate; the magnetic-sensing angle sensor is arranged opposite to the magnetic piece; the controller is respectively connected with the driving mechanism and the magnetic-sensing angle sensor and is configured to control the driving mechanism to work or stop working based on the angle size detected by the magnetic-sensing angle sensor. Through magnetic field interaction between magnetic-sensing angle sensor and the magnetic part, the angle that the driving medium rotated is detected out by magnetic-sensing angle sensor at the driving medium rotation in-process for the controller can control actuating mechanism work or stop work according to the angle size that magnetic-sensing angle sensor detected, avoids actuating mechanism excessively to operate, is favorable to prolonging actuating mechanism's life-span, the energy saving.

Description

Door lock device and anti-theft door

Technical Field

The disclosure relates to the field of locks, in particular to a door lock device and an anti-theft door.

Background

The door lock device is an important component of the security door, and is generally arranged on a door panel of the security door for controlling the security door.

The conventional door lock device can be unlocked and locked manually and also can be unlocked and locked automatically. Such door lock devices generally include a transmission member and a driving mechanism for driving the transmission member to achieve unlocking or locking.

When the driving mechanism drives the transmission member to unlock and lock, the driving mechanism generally drives the transmission member to rotate continuously in one direction, and after the transmission member is unlocked or locked, the driving mechanism still outputs torque to the transmission member. This is because it is impossible to determine whether the transmission member is rotated in place, and therefore, the design is adopted in which the driving mechanism continuously outputs the torque to the transmission member even if the transmission member is not rotated. However, this design can affect the life of the drive mechanism and result in wasted energy.

SUMMERY OF THE UTILITY MODEL

The disclosed embodiment provides a door lock device and an anti-theft door, which can prolong the service life of a driving mechanism and save energy. The technical scheme is as follows:

in one aspect, embodiments of the present disclosure provide a door lock device, which includes a lock body, a transmission member, a magnetic member, a driving mechanism, a magnetically sensitive angle sensor, and a controller;

the first end of the transmission piece is connected with the lock body and used for triggering the lock body to be unlocked or locked, and the magnetic piece is positioned at the second end of the transmission piece;

the driving mechanism is connected with the transmission piece and is used for driving the transmission piece to rotate;

the magnetic-sensing angle sensor is arranged opposite to the magnetic piece;

the controller is respectively connected with the driving mechanism and the magnetic-sensing angle sensor and is configured to control the driving mechanism to work or stop working based on the angle size detected by the magnetic-sensing angle sensor.

Optionally, the magnetic-sensing angle sensor includes a sensor main body and a main board, the sensor main body is located on the main board, the main board has at least one avoidance hole, and the avoidance hole is located on the side of the sensor main body;

the magnetic part is positioned in the center of the end face of the second end of the transmission part and is opposite to the sensor main body;

the terminal surface of driving medium second end has at least one projection, the projection eccentric settings, the projection is located dodge in the hole, just the projection is at least partly located the mainboard is kept away from one side of magnetic part.

Optionally, the main board has two avoidance holes, and the two avoidance holes are respectively located at two sides of the sensor main body;

the transmission part is provided with two convex columns, the two convex columns are centrosymmetric about the axis of the transmission part, and the two convex columns are respectively positioned in the two avoiding holes.

Optionally, the end face of the second end of the transmission member has a groove in the center, and the magnetic member is located in the groove.

Optionally, the driving mechanism comprises a housing, a motor and a reduction gear set, the motor and the reduction gear set are located in the housing, and the reduction gear set is in transmission connection with the motor and the transmission member;

the outer surface of the outer shell has a receiving groove in which the main board is located.

Optionally, the transmission member includes a rotating rod and a handle driving shaft, one end of the rotating rod is connected to the lock body, the other end of the rotating rod is coaxially connected to one end of the handle driving shaft, the handle driving shaft is inserted into an output gear of the reduction gear set, and the other end of the handle driving shaft is connected to the magnetic member.

Optionally, the outer side wall of the handle drive shaft has at least one first stop;

the output gear is annular, the inner wall of the output gear is provided with at least one second stop dog, the output gear is in clearance fit with the handle driving shaft, and the first stop dog and the second stop dog are distributed along the circumferential direction of the output gear.

Optionally, the door lock device further comprises a panel and a handle, the handle and the driving mechanism are located on two opposite sides of the panel and are both connected with the panel, and the handle is connected with the convex column.

Optionally, an end face of the handle opposite to the driving mechanism is provided with a jack, the jack is eccentrically arranged, and the convex column is inserted into the jack.

On the other hand, the embodiment of the present disclosure further provides a security door, which includes a door panel and the door lock device as described in the foregoing aspect, where the door lock device is connected to the door panel.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

through set up magnetic-sensing angle sensor, magnetism spare and controller in door lock device, arrange the second end at the driving medium with the magnetism spare, arrange magnetic-sensing angle sensor and magnetism spare relatively, the magnetism spare can rotate along with the rotation of driving medium. Through magnetic field interaction between magnetic-sensing angle sensor and the magnetic part, the angle that the driving medium rotated is detected out by magnetic-sensing angle sensor at the driving medium rotation in-process for the controller can control actuating mechanism work or stop work according to the angle size that magnetic-sensing angle sensor detected, avoids actuating mechanism excessively to operate, is favorable to prolonging actuating mechanism's life-span, the energy saving.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a door lock device according to an embodiment of the present disclosure;

fig. 2 is a schematic overall structural view of a door lock device provided in an embodiment of the present disclosure;

fig. 3 is a partially exploded view of a door lock device according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of an assembly of a magnetically sensitive angle sensor provided by an embodiment of the present disclosure;

fig. 5 is an exploded view of a door lock device according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of another door lock device provided in the embodiment of the present disclosure;

FIG. 7 is an assembled view of the magnetically sensitive angle sensor of the door latch mechanism of FIG. 6;

fig. 8 is a flowchart of a control method of a security door according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," "third," and similar terms in the description and claims of the present disclosure are not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.

Fig. 1 and 2 are schematic views illustrating an overall structure of a door lock device according to an embodiment of the present disclosure. As shown in fig. 1 and 2, the door lock device includes a lock body 10, a driver 20, and a driving mechanism 30.

The first end of the transmission member 20 is connected to the lock body 10, and the transmission member 20 is used to trigger the lock body 10 to unlock or lock. The lock body 10 has an unlocked state and a locked state, and by rotating the transmission member 20, the lock body 10 can be triggered to be unlocked to switch the lock body 10 from the locked state to the unlocked state, or the lock body 10 can be triggered to be locked to switch the lock body 10 from the unlocked state to the locked state.

The drive mechanism 30 is connected to the transmission member 20. The driving mechanism 30 is used to drive the transmission member 20 to rotate so as to trigger the lock body 10 to unlock or lock.

Fig. 3 is a partially exploded view of a door lock device according to an embodiment of the present disclosure. As shown in fig. 3, the door-lock apparatus further includes a magnetically sensitive angle sensor 50, a magnetic member 40, and a controller (not shown). The magnetic member 40 is located at a second end of the transmission member 20.

The magnetically sensitive angle sensor 50 is arranged opposite to the magnetic member 40.

A controller is connected to the driving mechanism 30 and the magnetically sensitive angle sensor 50, respectively, and the controller is configured to control the driving mechanism 30 to operate or stop operating based on the magnitude of the angle detected by the magnetically sensitive angle sensor 50.

By providing the magnetic angle sensor 50, the magnetic member 40 and the controller in the door lock device, disposing the magnetic member 40 at the second end of the transmission member 20, and disposing the magnetic angle sensor 50 opposite to the magnetic member 40, the magnetic member 40 can be rotated with the rotation of the transmission member 20. Through the interaction of the magnetic field between the magnetic-sensing angle sensor 50 and the magnetic part 40, in the rotating process of the transmission part 20, the rotating angle of the transmission part 20 is detected by the magnetic-sensing angle sensor 50, so that the controller can control the driving mechanism 30 to work or stop working according to the size of the angle detected by the magnetic-sensing angle sensor 50, the excessive operation of the driving mechanism 30 is avoided, the service life of the driving mechanism 30 is prolonged, and the energy is saved.

As shown in fig. 3, the drive mechanism 30 includes a housing 31, a motor 32, and a reduction gear set 33, and the motor 32 and the reduction gear set 33 are located in the housing 31. The reduction gear set 33 drivingly connects the motor 32 and the transmission member 20.

The reduction gear set 33 includes a plurality of gears, at least one of which includes an input gear and an output gear 331, the input gear is fitted over the rotating shaft of the motor 32, and the output gear 331 is fitted over the transmission member 20. When the motor 32 rotates, power is transmitted to the transmission member 20 through the reduction gear set 33, so that the transmission member 20 rotates.

The controller is coupled to the motor 32 to control operation of the motor 32, such as start, stop, rotation, and speed of the motor 32.

The housing 31 serves to protect the motor 32 and the reduction gear set 33 from foreign substances affecting the rotation of the reduction gear set 33. The assembly of the door lock device is also facilitated by assembling the motor 32 and the reduction gear set 33 as a single body through the housing 31.

Alternatively, the housing 31 may include a top cover 311 and a bottom cover 312, and the top cover 311 and the bottom cover 312 are folded with respect to each other to form a space for accommodating the motor 32 and the reduction gear set 33.

Illustratively, the top cover 311 and the bottom cover 312 are coupled by screws.

Fig. 4 is an assembly schematic diagram of a magneto-sensitive angle sensor provided by an embodiment of the present disclosure. As shown in fig. 4, the outer surface of the housing 31 has a receiving groove 312a, and the magnetically sensitive angle sensor 50 is located in the receiving groove 312 a.

The receiving groove 312a is formed on the bottom cover 312, that is, the outer case 31 is adjacent to the outer surface of the panel 70. Accommodate magnetism sensing angle sensor 50 through holding tank 312a, make things convenient for magnetism sensing angle sensor 50's installation, also can avoid magnetism sensing angle sensor 50 impaired for magnetism sensing angle sensor 50 provides the protection. The accommodating groove 312a can also limit the magnetic-sensing angle sensor 50, and avoid the magnetic-sensing angle sensor 50 from loosening to influence the accuracy of angle detection.

As shown in fig. 4, the bottom of the receiving groove 312a may further have a connecting hole 312b, and the magnetic angle sensor 50 may be fixedly connected to the housing 31 by the engagement of a screw with the connecting hole 312 b.

As shown in fig. 3, the driving member 20 includes a rotation rod 21 and a handle driving shaft 22, and one end of the rotation rod 21 is connected to the lock body 10 and the other end is coaxially connected to one end of the handle driving shaft 22. The handle driving shaft 22 is inserted into the output gear 331 of the reduction gear set 33, and the other end of the handle driving shaft 22 is connected to the magnetic member 40.

The reduction gear set 33 includes a plurality of gears, and the motor 32 can output a large torque through the reduction gear set 33 formed by the plurality of gears. Wherein the output gear 331 of the reduction gear set 33 is used for connecting with the handle driving shaft 22 to rotate the handle driving shaft 22. The driving member 20 is configured as a rotation rod 21 and a handle driving shaft 22, the handle driving shaft 22 is inserted into the output gear 331 and can be assembled with the driving mechanism 30, and the rotation rod 21 is assembled with the lock body 10, which facilitates the assembly of the door lock device.

The rotary rod 21 may have a polygonal shape, and one end of the handle driving shaft 22 may have a polygonal insertion hole into which the rotary rod 21 is inserted so as to be incapable of rotating relative to the handle driving shaft 22 in the circumferential direction.

Fig. 5 is an exploded schematic view of a door lock device according to an embodiment of the present disclosure. As shown in fig. 5, the outer sidewall of the handle drive shaft 22 has at least one first stopper 222. The output gear 331 has a ring shape, and an inner wall of the output gear 331 has at least one second stopper 3311. The output gear 331 is fitted over the handle driving shaft 22 and is in clearance fit with the handle driving shaft 22, and the first stopper 222 and the second stopper 3311 are distributed along the circumferential direction of the output gear 331.

Since the output gear 331 is clearance-fitted to the handle driving shaft 22, the output gear 331 and the handle driving shaft 22 can rotate relatively. Since the first stopper 222 is disposed on the outer side wall of the handle driving shaft 22 and the second stopper 3311 is disposed on the inner wall of the output gear 331, after the output gear 331 and the handle driving shaft 22 rotate relatively by a certain angle until the first stopper 222 and the second stopper 3311 contact, one of the output gear 331 and the handle driving shaft 22 can continue to rotate with the other without changing the rotation direction. When the steering direction changes, the first stopper 222 and the second stopper 3311 are separated, and the output gear 331 and the handle drive shaft 22 can rotate relative to each other.

In the disclosed embodiment, the outer sidewall of the handle driving shaft 22 has two first stoppers 222, and the two first stoppers 222 are symmetrically arranged about the axial center of the handle driving shaft 22. The inner wall of the output gear 331 has two second stoppers 3311, and the two second stoppers 3311 are arranged symmetrically about the center of the axis of the output gear 331.

As shown in fig. 4, the magneto-sensitive angle sensor 50 includes a sensor main body 51 and a main board 52, the sensor main body 51 is located on the main board 52, the main board 52 has at least one avoiding hole 52a, and the avoiding hole 52a is located on a side of the sensor main body 51. The main board 52 may be fixedly attached to the housing 31 by screws.

The magnetic member 40 is located at the center of the end surface of the second end of the transmission member 20 and is opposite to the sensor body 51.

The end surface of the second end of the transmission member 20 has at least one protruding column 221, the protruding column 221 is eccentrically disposed, the protruding column 221 is located in the avoiding hole 52a, and at least a portion of the protruding column 221 is located on a side of the main plate 52 away from the magnetic member 40.

The magnetic member 40 is disposed at the center of the end surface of the handle drive shaft 22 at the end remote from the rotary shaft 21, and rotates together with the handle drive shaft 22 when the handle drive shaft 22 rotates.

As shown in fig. 4, the center of the end surface of the second end of the transmission member 20, that is, the center of the end surface of the handle driving shaft 22 away from the rotating shaft 21, has a recess 22a, and the magnetic member 40 is located in the recess 22 a.

The magnetic part 40 is more firmly installed by arranging the groove 22a, and the groove 22a can play a role in limiting, so that the problem that the magnetic sensitive angle sensor 50 measures inaccurate results due to the fact that the magnetic part 40 and the handle driving shaft 22 rotate relatively is avoided.

The magnetic member 40 may include magnetic steel 41 and a magnetic steel sleeve 42, the magnetic steel 41 being located in the magnetic steel sleeve 42. The magnetic steel sleeve 42 may have a prism shape, and the recess 22a in the center of the end surface of the handle driving shaft 22 far from the end of the rotating rod 21 has a prism shape, so that the magnetic steel sleeve 42 can be engaged with the recess 22a to prevent the magnetic member 40 from rotating.

In the example shown in fig. 4, the end of the handle drive shaft 22 remote from the rotary lever 21 has a boss 221. The boss 221 is adapted to form a fit with the handle 80 such that the handle drive shaft 22 and the handle 80 can rotate together. The relief hole 52a of the main plate 52 allows the convex pillar 221 to pass through the main plate 52 to be connected to the handle 80 without affecting the rotation of the handle driving shaft 22.

The avoidance hole 52a can also limit the rotation angle of the handle driving shaft 22, and after the handle driving shaft 22 rotates until the convex pillar 221 contacts with the hole wall of the avoidance hole 52a, the handle driving shaft 22 is limited from further rotation.

In the embodiment of the present disclosure, the avoiding hole 52a is arc-shaped, and the center of the arc is located on the axis of the handle driving shaft 22.

Fig. 6 is a schematic structural diagram of another door lock device provided in the embodiment of the present disclosure. The door latch apparatus differs from the door latch apparatus shown in fig. 5 in the main plate 52 and the handle driving shaft 22. Fig. 7 is an assembly view of a magnetic sensing angle sensor of the door lock apparatus shown in fig. 6. As shown in fig. 7, in the door lock device, the main plate 52 has two escape holes 52a, and the two escape holes 52a are respectively located on both sides of the sensor body 51; the transmission member 20 has two protruding columns 221, the two protruding columns 221 are centrosymmetric with respect to the axis of the transmission member 20, and the two protruding columns 221 are respectively located in the two avoiding holes 52 a. In this example, the two symmetrical protruding columns 221 are arranged to form a fit with the handle 80, so that the fit between the handle 80 and the handle driving shaft 22 is more stable.

As shown in fig. 2, the door-lock apparatus further includes a panel 70 and a handle 80. The handle 80 and the drive mechanism 30 are located on opposite sides of the panel 70. Both the handle 80 and the drive mechanism 30 are connected to the faceplate 70. The handle 80 can be rotated relative to the panel 70, and the handle 80 is connected to one end of the driving member 20, so that the driving member 20 can be rotated by the handle 80 to control the lock body 10 to be unlocked or locked.

The drive mechanism 30 is housed in the panel 70. The magnetically sensitive angle sensor 50 is located between the drive mechanism 30 and the panel 70.

When the door lock device is installed, the lock body 10 is located inside a door panel of the security door, and the panel 70 is connected with the door panel. The magnetic angle sensor 50, the magnetic member 40, and the driving mechanism 30 may be accommodated in the panel 70. The driving mechanism 30 is connected with the panel 70, and both the magnetic member 40 and the magnetic-sensing angle sensor 50 are arranged between the driving mechanism 30 and the panel 70, so that when the security door needs to be repaired, the magnetic member 40 and the magnetic-sensing angle sensor 50 can be repaired or replaced by opening the panel 70.

Further, a controller may also be provided in the panel 70. The panel 70 may also be provided with a human-computer interaction structure, such as a display screen, a key, a fingerprint identification module, etc., for the convenience of the user.

As shown in fig. 5, the end surface of the handle 80 opposite to the driving mechanism 30 has a insertion hole 82a, the insertion hole 82a is eccentrically arranged, and the boss 221 is inserted into the insertion hole 82 a.

The handle 80 may include a grip portion 81 and a rotation shaft portion 82, the grip portion 81 being connected to one end of the rotation shaft portion 82, and an insertion hole 82a may be located on an end surface of the other end of the grip portion 81.

When the door lock device is assembled, the protruding column 221 is inserted into the insertion hole 82a of the end surface of the handle 80, so that the handle 80 can drive the transmission member 20 to rotate when the handle 80 is rotated, and the handle 80 can also be driven to rotate when the transmission member 20 is rotated.

A return member 83, such as a torsion spring, may also be provided between the handle 80 and the panel 70 to allow the handle 80 to automatically return when the handle 80 is released.

The embodiment of the disclosure also provides the security door which can be opened leftwards or rightwards. The security door comprises a door panel and any one of the door lock devices shown in figures 1-7, wherein the door lock device is connected with the door panel. For example, the lock body 10 may be located within and attached to a door panel, the face plate 70 may be located outside and attached to the door panel, and the actuating mechanism 30, the magnetic member 40, the magnetically sensitive angle sensor 50, and the controller may all be located within the face plate 70.

In the security door, the magnetic member 40 can be rotated according to the rotation of the transmission member 20 by providing the magnetic sensitive angle sensor 50, the magnetic member 40 and the controller in the door locking device, disposing the magnetic member 40 at the second end of the transmission member 20, and disposing the magnetic sensitive angle sensor 50 opposite to the magnetic member 40. The magnetic-sensing angle sensor 50 and the magnetic part 40 interact with each other through a magnetic field, and in the rotating process of the transmission part 20, the magnetic-sensing angle sensor 50 detects the rotating angle of the transmission part 20, so that the controller can control the driving mechanism 30 to work or stop working according to the angle detected by the magnetic-sensing angle sensor 50, the excessive operation of the driving mechanism 30 is avoided, the service life of the driving mechanism 30 is prolonged, and energy is saved.

Fig. 8 is a flowchart of a control method of a security door according to an embodiment of the present disclosure. The control method is used for controlling the anti-theft door. As shown in fig. 8, the control method includes:

in step S11, authentication is performed.

The authentication means includes, but is not limited to, identification card authentication, key authentication, password authentication, fingerprint authentication, palm print authentication, and iris authentication.

If the identity authentication is passed, executing the subsequent step S12; if the identity authentication is not passed, the flow is ended.

In step S12, after controlling the driving mechanism 30 to drive the transmission member 20 to rotate to the preset angle in the first direction, controlling the driving mechanism 30 to stop working, and unlocking the lock body 10.

And S11 to S12 are used for controlling the unlocking of the security door. That is, before the step S11, the lock body 10 is in the locked state. After the driving mechanism 30 drives the driving member 20 to rotate to trigger one of the magnetic-sensing angle sensors 50, the lock body 10 is unlocked, and at this time, the driving mechanism 30 stops working and stops continuously outputting torque to the driving member 20, so that the driving mechanism 30 can be prevented from being damaged, redundant energy consumption is also avoided, the service life is prolonged, and energy is saved.

After the lock body 10 is unlocked, there may be step S13, in which the driving mechanism 30 is controlled by the driving mechanism 30 to rotate the transmission member 20 in the opposite second direction, so as to reset the driving mechanism 30.

When the lock needs to be unlocked, the lock can also be manually unlocked, that is, a user directly screws the handle 80, and the driving member 20 is driven by the handle 80, so that the lock body 10 is unlocked. After unlocking, the handle 80 is released, and the handle 80 is reset by the reset member 83.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. A door lock device is characterized by comprising a lock body (10), a transmission piece (20), a magnetic piece (40), a driving mechanism (30), a magnetic-sensing angle sensor (50) and a controller;

the first end of the transmission piece (20) is connected with the lock body (10) and used for triggering the lock body (10) to unlock or lock, and the magnetic piece (40) is positioned at the second end of the transmission piece (20);

the driving mechanism (30) is connected with the transmission piece (20) and is used for driving the transmission piece (20) to rotate;

the magneto-sensitive angle sensor (50) is arranged opposite to the magnetic piece (40);

the controller is respectively connected with the driving mechanism (30) and the magnetic-sensing angle sensor (50) and is configured to control the driving mechanism (30) to work or stop working based on the angle size detected by the magnetic-sensing angle sensor (50).

2. The door-locking device according to claim 1, characterized in that the magnetic-sensitive angle sensor (50) comprises a sensor body (51) and a main plate (52), the sensor body (51) being located on the main plate (52), the main plate (52) having at least one avoiding hole (52 a), the avoiding hole (52 a) being located on a side of the sensor body (51);

the magnetic part (40) is positioned in the center of the end face of the second end of the transmission part (20) and is opposite to the sensor body (51);

the terminal surface of driving medium (20) second end has at least one projection (221), projection (221) eccentric arrangement, projection (221) are located dodge in the hole (52 a), just projection (221) are located at least partly mainboard (52) are kept away from one side of magnetic part (40).

3. The door-lock device according to claim 2, wherein the main plate (52) has two of the relief holes (52 a), the two relief holes (52 a) being located on both sides of the sensor body (51), respectively;

the transmission part (20) is provided with two convex columns (221), the two convex columns (221) are symmetrical about the center of the axis of the transmission part (20), and the two convex columns (221) are respectively positioned in the two avoiding holes (52 a).

4. Door-locking device according to claim 2, characterized in that the end surface of the second end of said transmission piece (20) has a recess (22 a) in the centre, said magnetic piece (40) being located in said recess (22 a).

5. Door-locking device according to claim 2, characterized in that said driving mechanism (30) comprises a casing (31), an electric motor (32) and a reduction gear set (33), said electric motor (32) and said reduction gear set (33) being located in said casing (31), said reduction gear set (33) drivingly connecting said electric motor (32) and said transmission member (20);

the outer surface of the outer case (31) has a receiving groove (312 a), and the main plate (52) is located in the receiving groove (312 a).

6. The door lock device according to claim 5, wherein the transmission member (20) comprises a rotary rod (21) and a handle driving shaft (22), one end of the rotary rod (21) is connected to the lock body (10) and the other end is coaxially connected to one end of the handle driving shaft (22), the handle driving shaft (22) is inserted into the output gear (331) of the reduction gear set (33), and the other end of the handle driving shaft (22) is connected to the magnetic member (40).

7. Door-locking device according to claim 6, characterized in that the outer side wall of said handle drive shaft (22) has at least one first stop (222);

the output gear (331) is annular, the inner wall of the output gear (331) is provided with at least one second stopper (3311), the output gear (331) is in clearance fit with the handle driving shaft (22), and the first stopper (222) and the second stopper (3311) are distributed along the circumferential direction of the output gear (331).

8. Door-lock device according to any one of claims 2 to 7, characterized in that it further comprises a panel (70) and a handle (80), said handle (80) and said actuating mechanism (30) being located on opposite sides of said panel (70) and being connected to said panel (70), said handle (80) being connected to said stud (221).

9. Door-lock device according to claim 8, characterized in that the handle (80) has, on its end face opposite to the drive mechanism (30), an insertion hole (82 a), the insertion hole (82 a) being eccentrically arranged, the stud (221) being inserted in the insertion hole (82 a).

10. A security door comprising a door panel and a door latch mechanism as claimed in any one of claims 1 to 9, said door latch mechanism being connected to said door panel.