Door lock device

Abstract

The utility model discloses a door lock device which comprises a lock shell assembly, an electromagnet, a coupler knuckle, a linkage rod assembly and a push rod, the coupler knuckle is rotationally connected to a first fixing shaft, the coupler knuckle is provided with a locking part buckled with a spring bolt, and the coupler knuckle is connected with a first rotating piece; the linkage rod assembly is rotationally connected to the second fixing shaft, and a second rotating piece is connected to the linkage rod assembly. The push rod is rotationally connected to the third fixing shaft, one end of the push rod abuts against an output shaft of the electromagnet, and the other end of the push rod acts on the abutting linkage rod assembly. The force arm from the third fixing shaft to the electromagnet is larger than the force arm from the third fixing shaft to the end, abutting against the linkage rod assembly, of the push rod, and the third fixing shaft deviates towards the side where the coupler knuckle is located relative to the second fixing shaft. The electromagnet and the push rod interact with each other, the push rod can adjust the scaling when the output torque of the electromagnet reaches the linkage rod assembly according to the lever principle, and the use flexibility is higher.

Description

Technical Field

[0001] This utility model relates to the field of door lock design technology, and in particular to a door lock device. Background Technology

[0002] In existing automatic door lock devices, locking or unlocking is achieved by switching between two rotating parts between the latch and the electromagnet. One rotating part is engaged with the latch at one end, and the other rotating part is engaged with the electromagnet at the other end. Taking the door lock device disclosed in CN220869053U as an example, when unlocking electrically, the electromagnet is energized, and the iron core pushes the pushing part of the linkage rod, causing the latch and the hook to disengage, thereby achieving the disengagement of the locking parts of the latch and the hook, and thus achieving the purpose of unlocking.

[0003] However, since the pushing part and the locking hook are located on both sides of the rotation center of the linkage, and the lever arm of the electromagnet acting on the pushing part is limited, in actual use, due to the large pulling force at the locking point, the friction between the locking hook and the locking part is large. When the electromagnet is energized, its iron core often fails to push the pushing part of the linkage, resulting in unlocking failure. Utility Model Content

[0004] To address the technical problem in existing door lock devices where the limited lever arm on the electromagnet's action side prevents the iron core from pushing the linkage rod during electric unlocking, thus causing unlocking failure, this invention provides a door lock device to solve the aforementioned problem.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a door lock device, including a lock housing assembly, an electromagnet, a latch, a linkage assembly, and a push rod. The lock housing assembly has a receiving cavity inside, and the side wall of the lock housing assembly has a first notch for the latch to extend into the receiving cavity. A first fixed shaft, a second fixed shaft, and a third fixed shaft are fixed inside the receiving cavity. The electromagnet is placed inside the receiving cavity. The latch is rotatably connected to the first fixed shaft and has a locking part that engages with the latch. A first rotating member is connected to the latch. The linkage assembly is rotatably connected to the second fixed shaft and a second rotating member is connected to the linkage assembly. The push rod is rotatably connected to the third fixed shaft. One end of the push rod abuts against the output shaft of the electromagnet, and the other end of the push rod acts to abut against the linkage assembly.

[0006] When the output shaft of the electromagnet is in the retracted state, the linkage assembly rotates to the locked position under the action of the second rotating member and engages with the hook tongue, which locks the latch. When the output shaft of the electromagnet is extended, the push rod pushes the linkage assembly to rotate, causing the linkage assembly to separate from the hook tongue. The hook tongue rotates to the unlocked position under the action of the first rotating member, at which point the latch can disengage from the hook tongue.

[0007] In an optional embodiment of this utility model, the lever arm of the force exerted by the electromagnet on the push rod is greater than the lever arm of the force exerted by the linkage assembly on the push rod, and the third fixed axis is offset relative to the side where the hook tongue is located along the second fixed axis.

[0008] In an optional embodiment of this utility model, the linkage assembly includes a first arm with a central through hole, the central through hole being fitted over a second fixed shaft, the end of the first arm having a locking hook that engages with a hook tongue, and the push rod abutting against the first arm.

[0009] In an optional embodiment of this utility model, the push rod includes an arc-shaped rod and a short rod whose ends intersect at a rotating hole. The rotating hole is fitted outside the third fixed shaft. The arc-shaped rod passes around the second fixed shaft and abuts against the output shaft of the electromagnet. The short rod abuts against the first arm.

[0010] In an optional embodiment of this utility model, both the first rotating member and the second rotating member are torsion springs.

[0011] In an optional embodiment of this utility model, the hook tongue is provided with a drive hole, and a first limiting wall and a second limiting wall are fixed inside the lock housing assembly. The first rotating member is sleeved on the first fixed shaft, one end of the first rotating member is stuck in the drive hole, and the other end of the first rotating member abuts against the second limiting wall. When the hook tongue is in the unlocked position, it abuts against the first limiting wall, and the first limiting wall inhibits the hook tongue from rotating in the unlocking direction.

[0012] In an optional embodiment of this utility model, the linkage assembly is provided with a reset hole, the lock housing assembly is fixed with a third limiting wall, the second rotating member is sleeved on the second fixed shaft, one end of the second rotating member is stuck in the reset hole, and the other end of the second rotating member abuts against the third limiting wall.

[0013] In an optional embodiment of this utility model, a fourth limiting wall is also fixed inside the lock housing assembly. When the hook tongue is engaged with the linkage rod assembly, the hook tongue abuts against the fourth limiting wall, and the fourth limiting wall inhibits the hook tongue from rotating in the locking direction.

[0014] In an optional embodiment of this utility model, the push rod and the linkage assembly are stacked vertically, and the first arm has a protrusion that protrudes toward the side where the push rod is located, and the protrusion abuts against the short rod.

[0015] In an optional embodiment of this utility model, the linkage assembly further includes a second arm that intersects the first arm at the central through hole, and the side of the lock housing assembly is provided with a second notch for the second arm to extend out.

[0016] In an optional embodiment of this utility model, the locking housing assembly includes a housing and a cover, the receiving cavity is located inside the housing, and the cover is placed on the housing.

[0017] The beneficial effects of this utility model are:

[0018] (1) The door lock device described in this utility model changes the way that the electromagnet interacts directly with the linkage assembly in the prior art. Instead, the electromagnet interacts with the push rod. The push rod can convert the torque output by the electromagnet and transfer it to the linkage assembly. Thus, by changing the push rod, the same electromagnet can output different torques, making it more flexible to use.

[0019] (2) This utility model utilizes the lever principle to bring the rotation center of the push rod close to the engagement point between the connecting rod assembly and the hook tongue. This increases the lever arm when the electromagnet pushes without increasing the cavity space, thereby increasing the force exerted by the push rod on the connecting rod assembly and making the separation of the connecting rod assembly and the hook tongue more reliable. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is an exploded view of a specific embodiment of the door lock device described in this utility model;

[0022] Figure 2 This is a perspective view of the hook tongue in this utility model (viewed from one side end face);

[0023] Figure 3 This is a perspective view of the hook tongue in this utility model (viewed from the other end face).

[0024] Figure 4 This is a perspective view of the linkage assembly in this utility model (viewed from one end face).

[0025] Figure 5 This is a perspective view of the linkage assembly in this utility model (viewed from the other end face).

[0026] Figure 6 This is a perspective view of the push rod in this utility model;

[0027] Figure 7 This is a schematic diagram of the internal structure of the shell in this utility model;

[0028] Figure 8 This is a schematic diagram of the door lock device's engagement relationship when the hook tongue and the linkage rod assembly are engaged;

[0029] Figure 9 This is a schematic diagram of the push rod assembly inside the housing;

[0030] Figure 10 This is a diagram showing the latch locked to the door lock mechanism;

[0031] Figure 11This is a schematic diagram of the electric unlocking process;

[0032] Figure 12 This is a schematic diagram showing the electromagnet reset after electric unlocking;

[0033] Figure 13 This is a diagram illustrating the manual unlocking process;

[0034] Figure 14 This is a schematic diagram of the initial stage of the latch locking the door;

[0035] Figure 15 This is a diagram showing the state when the lock hook and latch are about to engage during the locking process;

[0036] Figure 16 This is a diagram showing what happens after the door is locked.

[0037] In the diagram, 1. Locking tongue, 2. Shell cover, 3. Hook tongue, 31. Center hole, 32. First limiting end, 33. Locking part, 34. Pushing part, 35. Drive hole, 36. Snap-on part, 37. Second limiting end, 38. Cylinder body, 4. First rotating part, 5. Linkage rod assembly, 51. Second arm, 52. Central through hole, 53. Reset hole, 54. Locking hook, 55. Column, 56. Protrusion, 57. First arm, 6. Second rotating part, 7. Third fixing part 8. Shaft, 81. Push rod, 82. Force-bearing end, 83. Rotating hole, 84. Pushing end, 85. Arc rod, 9. Short rod, 10. Electromagnet, 10. Housing, 101. Mounting chamber, 102. Second notch, 103. First limiting wall, 104. First notch, 105. First fixed shaft, 106. Second limiting wall, 107. Mounting hole, 108. Third limiting wall, 109. Second fixed shaft, 1010. Fourth limiting wall, 1011. Connecting plate. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] Example 1

[0040] like Figures 1-9As shown, a door lock device is described in this embodiment, specifically a single electrically controlled door lock device. The door lock device includes a lock housing assembly, an electromagnet 9, a latch 3, a linkage assembly 5, and a push rod 8. The lock housing assembly has an internal receiving cavity, within which the electromagnet 9, latch 3, linkage assembly 5, and push rod 8 are all located. The side wall of the lock housing assembly has a first notch 104 for the latch 1 to extend into the receiving cavity. The latch 1 is connected to the door body and is used to connect the latch 3 to achieve the locking effect. A first fixed shaft 105, a second fixed shaft 109, and a third fixed shaft 7 are fixed within the receiving cavity; the electromagnet 9 is placed within a mounting compartment 101 of the receiving cavity.

[0041] The hook tongue 3 is rotatably connected to the first fixed shaft 105. The hook tongue 3 has a locking part 33 that engages with the locking tongue 1. A first rotating member 4 is connected to the hook tongue 3. The first rotating member 4 is used to provide the driving force for the hook tongue 3 to rotate in the unlocking direction. The hook tongue 3 rotates between the locked position and the unlocked position. The locked position of the hook tongue 3 refers to the position when the hook tongue 3 hooks the linkage assembly 5 and the locking tongue 1 at the same time. The unlocked position of the hook tongue 3 refers to the position when the hook tongue 3 is separated from both the linkage assembly 5 and the hook tongue 3. The rotation of the hook tongue 3 in the unlocking direction means that the hook tongue 3 rotates from the locked position to the unlocked position.

[0042] The linkage assembly 5 is rotatably connected to the second fixed shaft 109. A second rotating member 6 is connected to the linkage assembly 5. The second rotating member 6 is used to provide the driving force for the linkage assembly 5 to rotate in the locking direction. The linkage assembly 5 rotates between the locked position and the unlocked position. The locked position of the linkage assembly 5 refers to the position when the linkage assembly 5 hooks the hook tongue 3. The unlocked position of the linkage assembly 5 refers to the position when the linkage assembly 5 is disengaged from the hook tongue 3. The rotation of the linkage assembly 5 in the locking direction means that the linkage assembly 5 rotates from the unlocked position to the locked position.

[0043] Push rod 8 is rotatably connected to the third fixed shaft 7. One end of push rod 8 abuts against the output shaft of electromagnet 9, and the other end of push rod 8 abuts against the linkage assembly 5. When the output shaft of electromagnet 9 is in the retracted state, the linkage assembly 5 rotates to the locked position under the action of the second rotating member 6 and engages with the hook tongue 3, which locks the latch 1. When the output shaft of electromagnet 9 is extended, push rod 8 rotates around the third fixed shaft 7, thereby pushing the linkage assembly 5 to rotate, causing the linkage assembly 5 to separate from the hook tongue 3. The hook tongue 3 rotates to the unlocked position under the action of the first rotating member 4, at which point the latch 1 can disengage from the hook tongue 3.

[0044] The push rod 8 serves as a connector between the electromagnet 9 and the linkage assembly 5. The rotation center of the push rod 8 is the fulcrum of the force applied by the electromagnet 9. Since the rotation center of the push rod 8 and the rotation center of the linkage assembly 5 are not concentric, according to the lever principle, the push rod 8 in this invention can adjust the scaling ratio when the output torque of the electromagnet 9 reaches the linkage assembly 5.

[0045] In a further design, the lever arm of the force exerted by the electromagnet 9 on the push rod 8 is greater than the lever arm of the force exerted by the linkage assembly 5 on the push rod 8, and the third fixed shaft 7 is offset relative to the second fixed shaft 109 towards the side where the hook tongue 3 is located. This invention increases the lever arm of the electromagnet 9 without increasing the cavity space by offsetting the rotation center of the push rod 8 towards the hook tongue 3, specifically towards the engagement point between the linkage assembly 5 and the hook tongue 3. This, in turn, increases the force exerted by the push rod 8 on the linkage assembly 5, making it easier for the linkage assembly 5 and the hook tongue 3 to separate.

[0046] Lock case assembly:

[0047] The locking assembly includes a housing 10 and a cover 2. The receiving cavity is located inside the housing 10. The housing 10 is surrounded by the inner bottom surface and the side surface to form the receiving cavity. The cover 2 covers the top surface of the housing 10 to close the receiving cavity.

[0048] like Figure 1 and Figure 7 As shown, the first fixed shaft 105, the second fixed shaft 109, and the third fixed shaft 7 are connected to the inner bottom surface of the housing 10. They can be integrally formed with the housing 10 or fixed to the housing 10 via connectors. In this embodiment, the first fixed shaft 105 and the second fixed shaft 109 are connected by a connecting plate 1011, which is fixed to the inner bottom surface of the housing 10. Specifically, the connecting plate 1011 can be a protruding structure integrally formed on the inner bottom surface of the housing 10.

[0049] For the contact part of the push rod 8 on the linkage assembly 5, since the rotation center of the push rod 8 is closer to the hook tongue 3 relative to the second fixed shaft 109, in order to simplify the structure as much as possible, the contact part between the push rod 8 and the linkage assembly 5 is preferably located between the linkage assembly 5 and the hook tongue 3, that is, on the linkage assembly 5 between the second fixed shaft 109 and the hook tongue 3.

[0050] Linkage rod assembly 5 may have the following structure:

[0051] like Figure 4 and Figure 5As shown, the linkage assembly 5 includes a first arm 57 with a central through hole 52. The central through hole 52 is fitted outside the second fixed shaft 109, allowing the linkage assembly 5 to rotate around the second fixed shaft 109. The end of the first arm 57 has a locking hook 54 that engages with the hook tongue 3. In this structure, the push rod 8 abuts against the first arm 57. Since the third fixed shaft 7 is also located on the side where the first arm 57 is located, the lever arm length from the third fixed shaft 7 to the point where the push rod 8 abuts against the first arm 57 is very small. The thrust of the electromagnet 9 can be amplified many times when it reaches the first arm 57.

[0052] To improve the stability of the linkage assembly 5 and the second fixed shaft 109, an axially extending column 55 is provided at the central through hole 52. The column 55 forms a central through hole, and the column 55 can increase the contact area with the second fixed shaft 109.

[0053] Putter 8:

[0054] like Figure 6 As shown, after the contact positions of the third fixed shaft 7 and the push rod 8 are determined, the push rod 8 can be extended from its center to both ends through various structures. In this embodiment, the push rod 8 includes an arc-shaped rod 84 and a short rod 85 whose ends intersect at the rotating hole 82. The rotating hole 82 is fitted outside the third fixed shaft 7. The arc-shaped rod 84 has an arc-shaped structure and passes around the second fixed shaft 109 to abut against the output shaft of the electromagnet 9. The end of the short rod 85 is the pushing end 83, which abuts against the first arm 57. The end of the arc-shaped rod 84 is the force-receiving end 81, which abuts against the electromagnet 9. The inner bottom surface of the housing 10 has a mounting hole 107, and the third fixed shaft 7 is a connecting screw that connects the rotating hole 82 to the mounting hole.

[0055] Hook tongue 3:

[0056] like Figure 2 As shown, the hook tongue 3 includes a central hole 31 located at the center and inserted into the first fixed shaft 105, and a locking part 33 and a latching part 36 located at the outer edge. The latching part 36 engages with the hook part 54, and the locking part 33 engages with the hook tongue 1. Figure 3 As shown, in order to improve the stability of the engagement between the hook tongue 3 and the first fixed shaft 105, an axially extending cylindrical body 38 is also provided at the center hole 31. The center hole 31 is formed through the center of the cylindrical body 38. The provision of the cylindrical body 38 can increase the contact area with the first fixed shaft 105.

[0057] The first rotating element 4 and the second rotating element 6 are typically torsion springs. Torsion springs have energy storage capacity and rely on their restoring force to provide driving force for the hook tongue 3 and the linkage assembly 5. For the hook tongue 3, when it is in the locked position under the action of the linkage assembly 5, the first rotating element 4 contracts and stores energy. After the force of the linkage assembly 5 disappears, the first rotating element 4 drives the hook tongue 3 to rotate to the unlocked position. For the linkage assembly 5, when it is in the unlocked position under the action of the push rod 8, the second rotating element 6 contracts and stores energy. After the force of the push rod 8 disappears, the second rotating element 6 drives the linkage assembly 5 to rotate to the locked position.

[0058] In this embodiment, both the first rotating component 4 and the second rotating component 6 are torsion springs. During installation, one end of the torsion spring is connected to the fixed component, and the other end is connected to the rotating component.

[0059] Installation of the first rotating component 4:

[0060] like Figure 2 , Figure 7 and Figure 8 As shown, the latch 3 has a drive hole 35. A first limiting wall 103 and a second limiting wall 106 are fixed inside the lock housing assembly. A first rotating member 4 is sleeved on a first fixed shaft 105. One end of the first rotating member 4 is engaged in the drive hole 35, and the other end abuts against the second limiting wall 106. When the latch 3 is in the unlocked position, it abuts against the first limiting wall 103, which inhibits the latch 3 from rotating in the unlocking direction. The drive hole 35 is not coaxial with the center hole 31; therefore, when the latch 3 rotates, the drive hole 35 also rotates around the center hole 31. Figure 8 As shown, the first limiting end 32 of the hook tongue 3 abuts against the first limiting wall 103, and the first limiting wall 103 is set close to the first notch 104.

[0061] Driven by the latch 1, the hook tongue 3 moves from the unlocked position to the locked position. When the latch 1 and the hook tongue 3 are locked, the hook tongue 3 hooks onto the locking part 33. The hook tongue 3 is provided with a protruding pushing part 34, and a groove is formed between the pushing part 34 and the hook tongue 3 for the latch 1 to extend into. When it is necessary to lock the door, the latch 1 inserts into the first notch 104 and presses against the pushing part 34, causing the pushing part 34 to rotate toward the engagement position of the hook tongue 3 and the linkage assembly 5, that is, to rotate the hook tongue 3 in the locking direction.

[0062] To prevent the hook tongue 3 from rotating excessively in the locking direction, causing it to disengage from the linkage assembly 5 again, this embodiment also includes a fourth limiting wall 1010 fixed inside the lock housing assembly. When the hook tongue 3 is engaged with the linkage assembly 5, the hook tongue 3 abuts against the fourth limiting wall 1010, which inhibits the hook tongue 3 from rotating in the locking direction. Figure 8As shown, the fourth limiting wall 1010 is located in front of the latching part 36 along the rotation direction when the hook tongue 3 is locked. When the latching part 36 is engaged with the locking hook part 54, the second limiting end 37 of the edge of the hook tongue 3 abuts against the fourth limiting wall 1010. The hook tongue 3 remains stable under the combined action of the locking hook part 54 and the fourth limiting wall 1010. The hook tongue 3 can only disengage from the locking hook part 54 after the locking hook part 54 is rotated.

[0063] Installation of the second rotating component 6:

[0064] like Figure 4 , Figure 7 and Figure 8 As shown, the linkage assembly 5 is provided with a reset hole 53. A third limiting wall 108 is fixed inside the lock housing assembly. The second rotating member 6 is sleeved on the second fixed shaft 109. One end of the second rotating member 6 is stuck in the reset hole 53, and the other end of the second rotating member 6 abuts against the third limiting wall 108. The reset hole 53 is not coaxial with the central through hole 52. Therefore, when the linkage assembly 5 rotates, the reset hole 53 will also rotate around the central through hole 52.

[0065] like Figure 8 and Figure 9 As shown, the push rod 8 and the linkage assembly 5 are arranged in a stacked manner. The first arm 57 has a protrusion 56 that protrudes towards the side where the push rod 8 is located, and the protrusion 56 abuts against the short rod 85. This allows the push rod 8 to be added into the receiving cavity without increasing the planar area of ​​the lock housing assembly, reducing the need for modifications to traditional door lock devices.

[0066] Specific work process:

[0067] 1. The door lock device is in the locked state:

[0068] Figure 10 As can be seen, the latch 1 is inserted into the hook 3 and is located in the groove between the locking part 33 and the pushing part 34 of the hook 3. The door lock device is installed at the door frame, and the tail of the latch 1 is connected to the door body, so that the door body and the door frame can be tightly closed.

[0069] At this time, the rubber ring that seals between the door and the door frame has the following properties: Figure 10 The pulling force F shown in the diagram opens the door, so the latch 1 pulls the locking part 33, causing the hook 3 to move along... Figure 10 When the door rotates in the direction indicated by the arrow, the latching part 36 of the hook tongue 3 engages with the locking hook part 54 of the linkage assembly 5 to form a limit, preventing the hook tongue 3 from rotating in the direction of the arrow, thus ensuring that the door body and the door frame are tightly connected.

[0070] II. Electric unlocking:

[0071] like Figure 11As shown, when electromagnet 9 is energized, its iron core extends forward under the action of magnetic force, which acts on the force-receiving end 81 of push rod 8, pushing push rod 8 forward a certain distance. The pushing end 83 of push rod 8 then pushes the protrusion 56 of linkage assembly 5, causing linkage assembly 5 to rotate against the torque of the second rotating member 6 to the state shown in the figure. This causes the locking hook part 54 of linkage assembly 5 to separate from the latching part 36 of hook tongue 3. Since there is no obstruction, hook tongue 3 rotates under the combined action of the pulling of locking tongue 1 and the torque of the first rotating member 4. Figure 11 In this state, the locking tongue 1 can be freely pulled out because there is no obstruction from the locking part 33; at the same time, under the torque of the first rotating part 4, the first limiting end 32 of the hook tongue 3 contacts and engages with the first limiting wall 103 of the housing 10, so that the hook tongue 3 can maintain this position.

[0072] After unlocking is complete, the electromagnet 9 is de-energized, and its core returns to its initial state. At this time, the core separates from the force-bearing end 81 of the push rod 8. Since there is no external force acting on the torque of the second rotating component 6, the linkage assembly 5 and the push rod 8 return to their initial state. Figure 12 The initial state of the hook tongue 3; while under the torque of the first rotating part 4, the hook tongue 3 still maintains its initial state. Figure 12 The state shown in the image.

[0073] 3. When the latch 1 is inserted into the door lock device, i.e. when the door is closed:

[0074] When the door is closed, the latch 1 contacts the push part 34 of the hook 3, pushing the hook 3 to overcome the torque of the first rotating member 4 and rotate in the direction shown by the arrow, as shown in Figure 14.

[0075] At this time, the outer arc surface of the latching part 36 of the hook tongue 3 contacts the outer arc surface of the locking hook part 54 of the linkage assembly 5, causing the linkage assembly 5 to rotate. Figure 15 The state shown.

[0076] Until the latching part 36 of the hook tongue 3 and the locking hook part 54 are fully engaged. Figure 16 The state shown indicates that the latch 1 is locked to the door lock device.

[0077] Example 2

[0078] Based on the above embodiments, this embodiment adds a manual unlocking function. Specifically, a second arm 51 is provided on the linkage assembly 5, which intersects with the first arm 57 at the central through hole 52. The side of the lock housing assembly is provided with a second notch 102 for the second arm 51 to extend out.

[0079] The end of the second arm 51 is the manual operation end. Under the action of the second rotating member 6, the second arm 51 contacts and engages with the upper end face of the second notch 102, that is, the linkage assembly 5 has the following function under the action of the second rotating member 6: Figure 8 Rotational potential energy in the direction indicated by the middle arrow.

[0080] When unlocking manually, pressing down on the second arm 51 will disengage the locking hook 54 from the latch 36, causing the linkage assembly 5 to rotate against the torque of the second rotating member 6. Figure 13 When the latch 36 and the locking hook 54 are in the indicated state, the latch part 36 can be separated to achieve the purpose of unlocking; at this time, the electromagnet 9 is not energized, so the push rod 8 is not active.

[0081] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0082] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0083] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A door lock device, characterized in that, include: A lock housing assembly, wherein the lock housing assembly has a receiving cavity inside, and the side wall of the lock housing assembly has a first notch for the lock tongue to extend into the receiving cavity. A first fixed shaft, a second fixed shaft and a third fixed shaft are fixed inside the receiving cavity. The electromagnet is placed inside the receiving cavity; The hook tongue is rotatably connected to the first fixed shaft, and has a locking part that engages with the locking tongue. A first rotating component is connected to the hook tongue. A linkage assembly, wherein the linkage assembly is rotatably connected to a second fixed shaft, and a second rotating component is connected to the linkage assembly; A push rod is rotatably connected to a third fixed shaft. One end of the push rod abuts against the output shaft of the electromagnet, and the other end of the push rod abuts against the linkage assembly. When the output shaft of the electromagnet is in the retracted state, the linkage assembly rotates to the locked position under the action of the second rotating member and engages with the hook tongue, which locks the latch. When the output shaft of the electromagnet is extended, the push rod pushes the linkage assembly to rotate, causing the linkage assembly to separate from the hook tongue. The hook tongue rotates to the unlocked position under the action of the first rotating member, at which point the latch can disengage from the hook tongue.

2. The door lock device according to claim 1, characterized in that: The lever arm of the force exerted by the electromagnet on the push rod is greater than the lever arm of the force exerted by the linkage assembly on the push rod, and the third fixed axis is offset relative to the side where the hook tongue is located relative to the second fixed axis.

3. The door lock device according to claim 2, characterized in that: The linkage assembly includes a first arm with a central through hole, the central through hole being fitted over a second fixed shaft, and the end of the first arm having a locking hook that engages with a hook tongue, with the push rod abutting against the first arm.

4. The door lock device according to claim 3, characterized in that: The push rod includes an arc-shaped rod and a short rod whose ends intersect at a rotating hole. The rotating hole is fitted outside the third fixed shaft. The arc-shaped rod passes around the second fixed shaft and abuts against the output shaft of the electromagnet. The short rod abuts against the first arm.

5. The door lock device according to claim 1, characterized in that: Both the first rotating component and the second rotating component are torsion springs.

6. The door lock device according to claim 5, characterized in that: The hook tongue is provided with a drive hole, and a first limiting wall and a second limiting wall are fixed inside the lock housing assembly. The first rotating component is sleeved on the first fixed shaft. One end of the first rotating component is stuck in the drive hole, and the other end of the first rotating component abuts against the second limiting wall. When the hook tongue is in the unlocked position, it abuts against the first limiting wall, and the first limiting wall inhibits the hook tongue from rotating in the unlocking direction.

7. The door lock device according to claim 5, characterized in that: The linkage assembly is provided with a reset hole, the lock housing assembly is fixed with a third limiting wall, the second rotating component is sleeved on the second fixed shaft, one end of the second rotating component is stuck in the reset hole, and the other end of the second rotating component abuts against the third limiting wall.

8. The door lock device according to claim 6, characterized in that: The locking housing assembly also has a fourth limiting wall fixed inside. When the hook tongue is engaged with the linkage rod assembly, the hook tongue abuts against the fourth limiting wall, and the fourth limiting wall inhibits the hook tongue from rotating in the locking direction.

9. The door lock device according to claim 3, characterized in that: The push rod and linkage assembly are stacked vertically, and the first arm has a protrusion that protrudes towards the side where the push rod is located, and the protrusion abuts against the short rod.

10. The door lock device according to claim 3, characterized in that: The linkage assembly also includes a second arm that intersects the first arm at the central through hole, and the side of the lock housing assembly is provided with a second notch for the second arm to extend out.

11. The door lock device according to any one of claims 1-10, characterized in that: The locking assembly includes a housing and a cover, with the receiving cavity located inside the housing and the cover covering the housing.

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