Door lock device

Abstract

The utility model relates to the technical field of household appliances, and particularly discloses a door lock device which comprises a first fixing assembly, a second fixing assembly, a spring bolt and a locking mechanism. Wherein at least one of the first fixing assembly and the second fixing assembly is provided with a rotating hole, the rotating pin is arranged in the rotating hole in a penetrating mode, and the second fixing assembly can rotate around the central axis of the rotating pin relative to the first fixing assembly; the spring bolt is used for being connected with a door body. The locking mechanism is arranged on the second fixing assembly, and the locking end of the locking mechanism can be matched with the spring bolt in a locking mode so that the door body and the first fixing assembly can be relatively locked. In the process that the second fixing assembly rotates relative to the first fixing assembly, the locking end and the spring bolt can be driven to be locked or unlocked. Compared with a sliding groove and a sliding protrusion, machining of the rotating pin and the rotating hole is more convenient, the precision is easier to control, the risk of clamping stagnation is reduced, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field especially relates to a door lock device. BACKGROUND

[0002] The washing machine includes a lock tongue connected with a door body and a door lock device connected with a door frame, wherein the door lock device includes a locking mechanism, and a locking end in the locking mechanism can be locked with the lock tongue to prevent the door body from being separated from the door frame, but in order to avoid manual unlocking in the case of power failure, a first fixing seat and a second fixing seat are generally arranged in the door lock device, the first fixing seat is fixedly connected to the door frame, and the second fixing seat and the first fixing seat are slidably connected through a sliding groove and a sliding convex structure, so that the locking mechanism fixed to the second fixing seat can move away from the lock tongue when the second fixing seat is moved, thereby realizing manual unlocking.

[0003] The first fixing seat and the second fixing seat are slidably connected through the sliding groove and the sliding convex structure, the size of the sliding groove is too large to affect the fitting accuracy, and the size is too small to easily cause jamming, thereby affecting the user experience.

[0004] Therefore, it is urgent to research a door lock device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a door lock device to solve the problem that the sliding connection easily causes jamming in the prior art, thereby affecting the user experience.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The door lock device comprises:

[0008] A first fixing assembly;

[0009] A second fixing assembly, at least one of the first fixing assembly and the second fixing assembly is provided with a rotating hole, a rotating pin is arranged in the rotating hole, and the second fixing assembly can rotate relative to the first fixing assembly about the central axis of the rotating pin.

[0010] A lock tongue for connecting with a door body;

[0011] A locking mechanism arranged in the second fixing assembly, a locking end of the locking mechanism can be locked with the lock tongue to relatively lock the door body and the first fixing assembly, and the second fixing assembly can drive the locking end to lock or unlock the lock tongue during the rotation relative to the first fixing assembly.

[0012] As an optional technical scheme of the door lock device, the first fixing assembly has a first fixing cavity inside; wherein,

[0013] The first fixed assembly further has a locking channel communicating with the first fixed cavity, the second fixed assembly is located inside the first fixed cavity, and the lock tongue can be locked with the locking end through the locking channel; and / or,

[0014] The first fixed assembly further has an unlocking channel, and the second fixed assembly has an unlocking part at one end away from the central axis, and the locking mechanism further includes an unlocking piece arranged in the unlocking channel, one end of the unlocking piece being located in the first fixed cavity and connected with the unlocking part, and the other end being located outside the first fixed cavity.

[0015] As an optional technical solution of the door lock device, the first fixed assembly includes a first base and a first cover body, the first base has a mounting groove, and the first cover body is connected to the first base and covers the opening of the mounting groove to form the first fixed cavity; wherein,

[0016] The locking channel is arranged in the first cover body; and / or,

[0017] The unlocking channel is arranged in the first base.

[0018] As an optional technical solution of the door lock device, the bottom of the first base is protruded towards the first cover body to form the rotating pin, and the first cover body has a limiting hole, and one end of the rotating pin away from the first base is arranged in the limiting hole.

[0019] As an optional technical solution of the door lock device, the rotating pin has a connecting channel penetrating along the axis direction of the rotating pin, and the door lock device further includes a fixed pin and a fixed clasp, the fixed pin includes a fixed body, a fixed end part arranged at one end of the fixed body, and a clamping groove arranged at the other end of the fixed body, the outer diameter of the fixed end part and the outer diameter of the fixed clasp are both greater than the diameter of the limiting hole, the fixed body is arranged in the connecting channel, and the fixed clasp is clamped in the clamping groove.

[0020] As an optional technical solution of the door lock device, the door lock device further includes a fixed clasp, the rotating pin includes a rotating body, a limiting end part arranged at one end of the rotating body, and a rotating clamping groove arranged at the other end of the rotating body, the outer diameter of the limiting end part and the outer diameter of the fixed clasp are both greater than the diameter of the rotating hole, the first base and the first cover body are both provided with a limiting hole, the rotating body is arranged in the rotating hole and the two limiting holes and can at least rotate with the rotating hole, and the fixed clasp is clamped in the rotating clamping groove.

[0021] As an optional technical scheme of the door lock device, the second fixing assembly comprises a second base and a second cover body, and the rotating hole comprises a base hole arranged on the second base and a cover hole arranged on the second cover body.

[0022] As an optional technical scheme of the door lock device, the door lock device further comprises a driving assembly, the driving assembly comprises a first driving member arranged on the second fixing assembly and used for driving the second fixing assembly to rotate relative to the first fixing assembly.

[0023] As an optional technical scheme of the door lock device, the driving assembly further comprises a rack arranged on the first fixing assembly, the rack is arc-shaped and surrounds the outer periphery of the rotating pin, the first driving member is fixedly arranged on the second fixing assembly, and a gear meshing with the rack is arranged on the output end of the first driving member.

[0024] As an optional technical scheme of the door lock device, the first fixing assembly is provided with a sliding groove, the rack is slidingly arranged in the sliding groove, and in the sliding process of the rack, the second fixing assembly is driven to swing relative to the first fixing assembly, so that the locking end of the locking mechanism is locked or unlocked with the lock tongue, the driving assembly further comprises an elastic member, the elastic member is arranged between the rack and the first fixing assembly, and the elastic member drives the rack to slide and drives the second fixing assembly to swing, so that the locking end of the locking mechanism is locked with the lock tongue.

[0025] As an optional technical scheme of the door lock device, the locking mechanism comprises a second driving member and a lead screw, the lead screw is rotatably arranged on the second fixing assembly, the second driving member is arranged on the second fixing assembly and is in transmission connection with the lead screw, the lock tongue is in strip shape, and a tooth portion is arranged on the side of the lock tongue facing the lead screw, and the lead screw is in meshing connection with the tooth portion.

[0026] The door lock device has the following beneficial effects:

[0027] The utility model discloses a door lock device, the door lock device includes first fixed assembly and the second fixed assembly for installing locking mechanism, wherein, the locking end of locking mechanism can be locked with lock tongue, and the second fixed assembly and first fixed assembly are rotated and are cooperated through rotating pin and rotating hole, and in the rotating process of second fixed assembly, locking mechanism can be driven to move, to make the locking end and lock tongue manual unlocking, compared with the sliding groove and the sliding convex, the processing of rotating pin and rotating hole is more convenient, and the precision is easier to control, reduces the risk that second fixed assembly appears to be stuck in the rotating process, improves user experience. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the contents of the embodiments of the present application and these drawings without any creative effort.

[0029] Figure 1 It is a structure schematic view of the door lock device in the first perspective of the embodiment of the present application.

[0030] Figure 2 It is a structure schematic view of the door lock device in the second perspective of the embodiment of the present application.

[0031] Figure 3 It is Figure 2 It is a sectional view along the direction A-A.

[0032] Figure 4 It is a structure schematic view of the internal structure of the door lock device in the embodiment of the present application.

[0033] Figure 5 It is a structure schematic view of the cooperation of the first fixed assembly and the second fixed assembly in the second embodiment of the present application.

[0034] In the drawings:

[0035] 100, the first fixed assembly; 110, the first base; 111, the rotating pin; 112, the unlocking channel; 120, the first cover body;

[0036] 200, the second fixed assembly; 210, the second base; 211, the base hole; 220, the second cover body; 221, the cover hole; 231, the first driving piece; 232, the rack; 233, the gear; 234, the elastic piece;

[0037] 300, the lock tongue;

[0038] 400, the locking mechanism; 410, the second driving piece; 420, the screw rod;

[0039] 510, the fixed pin; 520, the fixed clasp spring. DETAILED DESCRIPTION

[0040] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings.

[0041] In this application, the terms "include", "comprise" or "have" or any other variations thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that include a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0042] In this application, the term "and / or", is a description of an associated object, which means that there can be three kinds of relationships. For example, A and / or B, can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally indicates that the front and rear associated objects are in a "and / or" relationship.

[0043] In this application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection means that two parts or components are connected together without setting intermediate parts, indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0044] In this application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

[0045] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0046] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, it is also understood in the context that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below and back below, etc.

[0047] Embodiment one

[0048] As shown in Figures 1 to 5 The present embodiment provides a door lock device applied to washing equipment such as washing machines and clothes dryers to realize locking of the door body of the washing equipment and the door frame of the washing equipment and manual unlocking. The door lock device comprises a first fixed component 100, a second fixed component 200, a lock tongue 300 and a locking mechanism 400. Among the first fixed component 100 and the second fixed component 200, at least one is provided with a rotating hole, a rotating pin 111 is arranged in the rotating hole, and the second fixed component 200 can rotate relative to the first fixed component 100 about the central axis of the rotating pin 111; the lock tongue 300 is used for connecting with the door body; the locking mechanism 400 is arranged in the second fixed component 200, and the locking end of the locking mechanism 400 can be locked and matched with the lock tongue 300 to relatively lock the door body and the first fixed component 100; during the rotation of the second fixed component 200 relative to the first fixed component 100, the locking end can drive the lock tongue 300 to lock or unlock.

[0049] Compared with the sliding groove and the sliding protrusion, the rotating pin 111 and the rotating hole are more convenient to process, and the precision is easier to control, which reduces the risk of jamming during the rotation of the second fixed component 200 relative to the first fixed component 100, and improves the user experience.

[0050] In some embodiments, the first fixed component 100 has a first fixed cavity inside; the first fixed component 100 further has a locking channel communicating with the first fixed cavity, the second fixed component 200 is located inside the first fixed cavity, and the lock tongue 300 can pass through the locking channel to be connected with the locking end, thereby avoiding interference with other structures during the movement of the second fixed component 200 relative to the first fixed component 100, and improving the convenience of using the door lock device; in addition, the first fixed component 100 can serve as a protective shell for the second fixed component 200, thereby improving the protection of the second fixed component 200 which is movably arranged.

[0051] In some embodiments, in combination Figure 2and Figure 3 As shown, the first fixing assembly 100 comprises a first base 110 and a first cover 120, the first base 110 has a mounting groove, and the first cover 120 is connected to the first base 110 and covers the opening of the mounting groove to form a first fixing cavity. The bottom of the first base 110 protrudes towards the first cover 120 to form a rotating pin 111, and the first cover 120 has a limiting hole, and the end of the rotating pin 111 away from the first base 110 is inserted into the limiting hole. Wherein, the rotating pin 111 is a stepped shaft, and has a main body part with a larger diameter and a plug-in part with a smaller diameter, and the plug-in part is inserted into the limiting hole.

[0052] In order to avoid the separation of the first cover 120 and the first base 110 from causing the rotating pin 111 to be separated from the limiting hole, in some embodiments, the rotating pin 111 has a connecting channel through the axis direction thereof, and the door lock device further comprises a fixing pin 510 and a fixing spring 520, the fixing pin 510 comprises a fixing body, a fixing end part provided at one end of the fixing body, and a clamping groove provided at the other end of the fixing body, the outer diameter of the fixing end part and the outer diameter of the fixing spring 520 are both larger than the diameter of the limiting hole, the fixing body is inserted into the connecting channel, the fixing spring 520 is clamped in the clamping groove, and the fixing end part and the fixing spring 520 are respectively arranged at two ends of the connecting channel. The arrangement of the fixing pin 510 and the fixing spring 520 realizes the limitation of the first cover 120 and the first base 110 at the rotating pin 111, avoids the separation of the first cover 120 and the first base 110, and thus ensures the cooperation stability of the rotating pin 111 and the limiting hole.

[0053] In addition, considering the cost and the convenience of processing, the first base 110 and the rotating pin 111 provided on the first base 110 are generally made of plastic material. In this embodiment, the fixing pin 510 can be made of metal material, thereby improving the supporting capacity of the rotating pin 111, avoiding the bending deformation of the rotating pin 111 during the rotation of the second fixing assembly 200, ensuring the rotation accuracy of the second fixing assembly 200 and thus ensuring the cooperation accuracy of the locking end and the lock tongue 300, and improving the service life of the door lock device.

[0054] The locking channel is provided in the first cover 120. In use, the lock tongue 300 is first inserted into the locking channel during the rotation of the door body relative to the door frame, and then can be locked and cooperated with the locking end.

[0055] In order to facilitate the installation of the locking mechanism 400, the second fixing assembly 200 comprises a second base 210 and a second cover 220, the second cover 220 covers the second base 210 to form a second fixing cavity, and the locking mechanism 400 is installed in the second fixing cavity. Wherein, the rotating hole comprises a base hole 211 provided in the second base 210 and a cover hole 221 provided in the second cover 220, and the base hole 211 and the cover hole 221 are coaxially arranged.

[0056] To manually drive the second fixed assembly 200 to rotate relative to the first fixed assembly 100, the first fixed assembly 100 further has an unlocking channel 112, and the second fixed assembly 200 has an unlocking portion at the end away from the central axis. The locking mechanism 400 further comprises an unlocking member arranged in the unlocking channel 112, one end of the unlocking member is arranged in the first fixed cavity and connected with the unlocking portion, and the other end is arranged outside the first fixed cavity. In this embodiment, the unlocking channel 112 is arranged in the first base 110. Through the arrangement of the unlocking member, the force of the user can be transmitted to the second fixed assembly 200 in the first fixed cavity. Exemplarily, the unlocking member is a rope, and pulling one end of the rope can drive the second fixed assembly 200 to rotate so as to unlock the locking end and the lock tongue 300.

[0057] In combination Figure 4 As shown in the drawings, the door lock device further comprises a driving assembly, the driving assembly comprising a first driving member 231 arranged in the second fixed assembly 200 and used for driving the second fixed assembly 200 to rotate relative to the first fixed assembly 100. The first driving member 231 is arranged in the second fixed cavity surrounded by the second cover 220 and the second base 210. Specifically, the driving assembly further comprises a rack 232 mounted on the first fixed assembly 100, the rack 232 being arc-shaped and arranged around the outer periphery of the rotating pin 111. The first driving member 231 is fixedly arranged on the second fixed assembly 200, and the output end thereof is provided with a gear 233 engaged with the rack 232. Through the transmission mode of the gear 233, the transmission accuracy can be effectively improved, so as to accurately control the rotation angle of the second fixed assembly 200 relative to the first fixed assembly 100, and ensure that the locking end of the locking mechanism 400 is accurately connected with the lock tongue 300. To realize power transmission, the first driving member 231 is a motor, the output end of which is provided with a first worm, and the second base 210 is provided with a first worm wheel engaged with the first worm, and the gear 233 is engaged with the first worm wheel. The first worm wheel and the gear 233 both have two meshing portions with different diameters to realize the speed reduction of the motor.

[0058] The laundry machine can be powered off during use, so that the locking end cannot be unlocked from the locking tongue 300, and the laundry inside the laundry machine is kept in a humid environment for a long time, and odor is generated. To this end, the first fixing assembly 100 has a sliding groove, and the rack 232 is slidably arranged in the sliding groove. During sliding of the rack 232, the first fixing assembly 100 is driven to swing relative to the second fixing assembly 200, so that the locking end of the locking mechanism 400 is locked or unlocked from the locking tongue 300. The driving assembly further comprises an elastic member 234 arranged between the rack 232 and the first fixing assembly 100. The rack 232 is driven to slide, and the second fixing assembly 200 is driven to swing, so that the locking end of the locking mechanism 400 is locked with the locking tongue 300. When powered off, the second fixing assembly 200 can be manually driven to rotate relative to the first fixing assembly 100, so as to drive the rack 232 to slide through the meshing of the gear 233. During this process, the elastic member 234 is elastically deformed and stores energy.

[0059] The elastic member 234 can be a spring. Further, the elastic member 234 is a compression spring. The end of the rack 232 is provided with a containing groove, and one end of the spring is located in the containing groove, and the other end abuts against a stop block on the first base 110. In other embodiments, the elastic member 234 can be a tension spring, or other components capable of elastic deformation.

[0060] The locking mechanism 400 comprises a second driving member 410 and a lead screw 420. The lead screw 420 is rotatably arranged in the second fixing assembly 200. The second driving member 410 is arranged in the second fixing assembly 200 and in transmission connection with the lead screw 420. The locking tongue 300 is in the shape of a long strip, and a tooth portion is arranged on the side facing the lead screw 420. The lead screw 420 is in meshing connection with the tooth portion. To realize power transmission, the second driving member 410 is an electric motor, and the output end of the electric motor is provided with a second worm. The second base 210 is rotatably provided with a second worm wheel in meshing connection with the second worm. The lead screw 420 is coaxially connected with a transmission wheel. The transmission wheel and the second worm wheel are in meshing connection with an intermediate wheel. At least one of the intermediate wheel and the second worm wheel has meshing portions with different diameters, so as to realize speed reduction of the electric motor.

[0061] To ensure the meshing stability of the locking tongue 300 and the lead screw 420, and to avoid the door body being opened, in some embodiments, the tooth portion on the locking tongue 300 is a rectangular tooth, and the cross section of the helical protrusion on the lead screw 420 is in the shape of a rectangle.

[0062] During rotation of the second fixing assembly 200, the lead screw 420 and the tooth portion cannot be precisely meshed, which can damage the lead screw 420 or the locking tongue 300. In addition, during rotation of the second fixing assembly 200, if the rotation angle is too small, the lead screw 420 and the tooth portion cannot be meshed. If the rotation angle is too large, the lead screw 420 and the tooth portion can collide with each other.

[0063] In the embodiment, due to the presence of the elastic member 234, when the lead screw 420 abuts against the lock tongue 300, if the lead screw 420 and the tooth portion of the lock tongue 300 are not precisely engaged, in the process of rotating the second fixed assembly 200 relative to the first fixed assembly 100, the elastic member 234 is elastically deformed and stores energy, and at the same time, the lead screw 420 rotates to finally engage the lead screw 420 and the tooth portion of the lock tongue 300. After the rotation of the lead screw 420 to engage the lead screw 420 and the tooth portion of the lock tongue 300, the energy in the elastic member 234 is released and the elastic member 234 returns to its original length. Thereafter, the lead screw 420 continues to rotate to move the lock tongue 300, thereby locking the door body, effectively solving the problem that the lead screw 420 and the lock tongue 300 cannot be precisely engaged, and avoiding damage to the teeth of the lead screw 420 and the lock tongue 300. In addition, the elastic member 234 can also make the contact between the lead screw 420 and the lock tongue 300 an elastic contact, avoiding hard collision and improving the service life. At the same time, the elastic member 234 can also provide a fault tolerance, reducing the precision requirement for the rotation angle of the second fixed assembly 200 relative to the first fixed assembly 100.

[0064] Embodiment Two

[0065] The embodiment provides a door lock device, which has substantially the same structure as the door lock device of the above-mentioned embodiments, except that the connection mode between the first fixed assembly 100 and the second fixed assembly 200 is different. As shown in Figure 5 As shown in the drawings, the door lock device further comprises a fixed clasp spring 520, the rotating pin 111 comprises a rotating body, a limiting end portion provided at one end of the rotating body, and a rotating clasp groove provided at the other end of the rotating body, the outer diameter of the limiting end portion and the outer diameter of the fixed clasp spring 520 are both greater than the diameter of the rotating hole, the first base 110 and the first cover 120 are both provided with limiting holes, the rotating body is provided in the rotating hole and the two limiting holes, the rotating body is in rotational cooperation with the rotating hole and is in transition or interference cooperation with the two limiting holes, the fixed clasp spring 520 is clamped in the rotating clasp groove, the two limiting holes are located between the fixed clasp spring 520 and the limiting end portion, and the outer diameter of the limiting end portion and the outer diameter of the fixed clasp spring 520 are both greater than the diameter of the limiting hole. The rotating pin 111 is made of metal.

[0066] In the embodiment, only one rotating pin 111 is used to complete the hinging between the first fixed assembly 100 and the second fixed assembly 200, which is simpler in structure, easier to produce, lower in processing cost, and easier to control in precision compared to the sliding groove and the sliding protrusion, thereby reducing the risk of jamming in the process of rotating the second fixed assembly 200 relative to the first fixed assembly 100 and improving the user experience.

[0067] The second fixing assembly 200 comprises a second base 210 and a second cover 220, the second cover 220 is covered on the second base 210 and surrounds a second fixing cavity, and the locking mechanism 400 is installed in the second fixing cavity.

[0068] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent substitution and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A door locking device, characterized by The utility model relates to a door lock device, which comprises: a first fixing assembly (100); a second fixing assembly (200), at least one of the first fixing assembly (100) and the second fixing assembly (200) is provided with a rotating hole, a rotating pin (111) is arranged in the rotating hole, and the second fixing assembly (200) can rotate relative to the first fixing assembly (100) around the central axis of the rotating pin (111); a lock tongue (300) for connecting with a door body; a locking mechanism (400) arranged in the second fixing assembly (200), a locking end of the locking mechanism (400) can be locked and matched with the lock tongue (300) to relatively lock the door body and the first fixing assembly (100); and the second fixing assembly (200) can drive the locking end to lock or unlock the lock tongue (300) during the rotation relative to the first fixing assembly (100).

2. The door latch arrangement of claim 1, wherein The first fixing assembly (100) has a first fixing cavity inside; wherein, the first fixing assembly (100) further has a locking channel communicating with the first fixing cavity, the second fixing assembly (200) is located inside the first fixing cavity, and the lock tongue (300) can pass through the locking channel to be locked and connected with the locking end; and / or, the first fixing assembly (100) further has an unlocking channel (112), one end of the second fixing assembly (200) away from the central axis has an unlocking part, and the locking mechanism (400) further comprises an unlocking piece arranged in the unlocking channel (112), one end of the unlocking piece is located in the first fixing cavity and connected with the unlocking part, and the other end is located outside the first fixing cavity.

3. The door latch arrangement of claim 2, wherein The first fixing assembly (100) comprises a first base (110) and a first cover (120), the first base (110) has a mounting groove, the first cover (120) is connected to the first base (110) and covers the opening of the mounting groove to form the first fixing cavity; wherein, the locking channel is arranged in the first cover (120); and / or, the unlocking channel (112) is arranged in the first base (110).

4. The door latch arrangement of claim 3, wherein The bottom of the first base (110) is protruded towards the first cover (120) to form the rotating pin (111), the first cover (120) has a limiting hole, and one end of the rotating pin (111) away from the first base (110) is arranged in the limiting hole.

5. The door latch arrangement of claim 4, wherein The rotating pin (111) has a connecting channel penetrating along the axis direction of the rotating pin (111), the door lock device further comprises a fixing pin (510) and a fixing clasp spring (520), the fixing pin (510) comprises a fixing body, a fixing end part arranged at one end of the fixing body, and a clamping groove arranged at the other end of the fixing body, the outer diameter of the fixing end part and the outer diameter of the fixing clasp spring (520) are both larger than the diameter of the limiting hole, the fixing body is arranged in the connecting channel, and the fixing clasp spring (520) is clamped in the clamping groove.

6. The door latch arrangement of claim 3, wherein The door lock device further comprises a fixed clasp spring (520), the rotating pin (111) comprises a rotating body, a limiting end provided at one end of the rotating body, and a rotating clasp groove provided at the other end of the rotating body, the outer diameter of the limiting end and the outer diameter of the fixed clasp spring (520) are both greater than the diameter of the rotating hole, the first base (110) and the first cover (120) are both provided with limiting holes, the rotating body is provided in the rotating hole and the two limiting holes, and at least can be rotationally matched with the rotating hole, and the fixed clasp spring (520) is clamped in the rotating clasp groove.

7. The door latch arrangement of claim 1, wherein The second fixing assembly (200) comprises a second base (210) and a second cover (220), and the rotating hole comprises a base hole (211) provided in the second base (210) and a cover hole (221) provided in the second cover (220).

8. The door latch arrangement of claim 1, wherein The door lock device further comprises a driving assembly, the driving assembly comprises a first driving member (231) provided in the second fixing assembly (200) and used for driving the second fixing assembly (200) to rotate relative to the first fixing assembly (100).

9. The door latch arrangement of claim 8, wherein The driving assembly further comprises a rack (232) mounted on the first fixing assembly (100), the rack (232) is arc-shaped and surrounds the outer periphery of the rotating pin (111), and the first driving member (231) is fixedly provided on the second fixing assembly (200) and is provided at the output end thereof with a gear (233) engaged with the rack (232).

10. The door latch arrangement of claim 9, wherein The first fixing assembly (100) has a sliding groove therein, the rack (232) is slidingly provided in the sliding groove, and in the sliding process of the rack (232), the second fixing assembly (200) is driven to swing relative to the first fixing assembly (100), so that the locking end of the locking mechanism (400) is locked or unlocked with the lock tongue (300), the driving assembly further comprises an elastic member (234), the elastic member (234) is provided between the rack (232) and the first fixing assembly (100), and drives the rack (232) to slide and drives the second fixing assembly (200) to swing, so that the locking end of the locking mechanism (400) is locked with the lock tongue (300).

11. The door closer device according to any one of claims 1 to 10, characterized in that The locking mechanism (400) comprises a second driving member (410) and a lead screw (420), the lead screw (420) is rotationally provided in the second fixing assembly (200), the second driving member (410) is provided in the second fixing assembly (200) and is in transmission connection with the lead screw (420), the lock tongue (300) is long strip-shaped and is provided at one side facing the lead screw (420) with a tooth portion, and the lead screw (420) is engaged with the tooth portion.

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