CN209915860U

CN209915860U - Locking mechanism and dust collector with same

Info

Publication number: CN209915860U
Application number: CN201821836588.4U
Authority: CN
Inventors: 郁唯一; 吴英奇; 施金鑫
Original assignee: Suzhou Cleva Electric Appliance Co Ltd
Current assignee: Suzhou Cleva Electric Appliance Co Ltd
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2020-01-10
Anticipated expiration: 2028-11-08

Abstract

The utility model provides a locking mechanism and a dust collector with the same, wherein the locking mechanism comprises a self-locking structure which is used for detachably connecting a first machine body and a second machine body; the self-locking structure comprises a lock tongue, a first limiting part matched with the lock tongue and a reset unit abutting against the lock tongue, the lock tongue is movably arranged on the first machine body, and the first limiting part is fixed on the second machine body; the locking tongue is operable to transition from a locked state to an unlocked state; in the locked state, an acting force (F1) applied to the arc force-bearing surface (153) by the arc limiting surface (111) and a virtual plane (L1) have an intersection point (O1), a direction in which a pivot center (O2) of the lock tongue points to the intersection point (O1) points to the outside of the first machine body, the virtual plane (L1) passes through the pivot center of the lock tongue and is perpendicular to the first direction, and the first direction (D1) is an assembling direction of the first machine body and the second machine body.

Description

Locking mechanism and dust collector with same

Technical Field

The utility model relates to a cleaning appliance field provides a locking mechanism and have its dust catcher very much.

Background

The dust collector is a common cleaning tool for families or workplaces, and the working principle of the dust collector is that a motor is used for driving blades to rotate at a high speed, air negative pressure is generated in a sealed shell, and dust is absorbed. The dust cup is a device for collecting dust, and in the prior art, the dust cup is arranged on a dust collector, the upper cover of the dust cup is connected with the dust cup through a lock catch, the lock catch is usually required to be pressed down firstly to unlock the lock catch when the upper cover of the dust cup is taken down, then the upper cover of the dust cup can be taken down, namely, the upper cover can be taken down only by implementing a plurality of actions, and the operation is troublesome.

In recent years, a technique for more conveniently detaching an upper cover of a dust cup from the dust cup has appeared, and for example, CN204909309U discloses a dust collector, which comprises: organism, first joint portion, dirt cup upper cover include lid, retaining member and elastic connection spare, and retaining member and last lid pivot ground are connected, and the retaining member has interconnect's second joint portion and carries the portion of drawing, carries during the unblock to draw the portion upwards rotate so that second joint portion with first joint portion breaks away from the cooperation. The locking piece is connected with the upper cover body and the dust cup, and the upper cover of the dust cup can be easily taken down to clean dust through the simple operation of lifting and pulling. However, the steps of cleaning the dust in the dust cup are still very complicated when the dust cup is fixed on the cleaner body.

Therefore, it is desirable to provide a cleaner which has a simpler structure and a simpler mode, is lower in cost, and can be used for realizing the detachment and locking of the dust cup from the cleaner body so as to clean dust in the dust cup more conveniently.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide a simple structure is compact, low cost, use convenient locking mechanism.

The second objective of the present invention is to provide a vacuum cleaner with the above-mentioned locking mechanism.

In order to achieve the above object, in one aspect, the embodiment of the present invention discloses a locking mechanism, which includes a self-locking structure for detachably connecting a first body and a second body;

the self-locking structure comprises a lock tongue, a first limiting part matched with the lock tongue and a reset unit abutting against the lock tongue, one end of the lock tongue is movably connected to the first machine body, the other end of the lock tongue is provided with a stress surface, the first limiting part is fixed on the second machine body, and the first limiting part comprises a limiting surface matched with the stress surface in shape;

the lock tongue can be switched between an unlocking state and a locking state in an operable mode, when the unlocking state is switched to the locking state, the first limiting part presses the lock tongue and then moves from one side, far away from the first machine body, of the lock tongue to one side, close to the first machine body, of the lock tongue along the first direction, the lock tongue resets under the action of resetting force of the resetting unit until the force bearing surface of the lock tongue abuts against the limiting surface, and the lock tongue is limited by at least one of the first machine body and the second machine body;

in the locked state, the direction extension line of the acting force applied to the arc-shaped stressed surface by the arc-shaped limiting surface and the virtual plane have an intersection point, the direction of the pivot center of the lock tongue points to the outside of the first machine body, the virtual plane passes through the pivot center of the lock tongue and is perpendicular to the first direction, and the first direction is the assembling direction of the first machine body and the second machine body.

As a further improvement of the embodiment of the present invention, in the locked state, the lock tongue is kept abutting against the first limiting portion under the action of the restoring force to limit the second body from being separated from the first body; and in an unlocking state, the lock tongue overcomes the action of the reset force to be separated from the first limiting part so as to allow the second machine body to be separated from the first machine body.

As a further improvement of the embodiment of the present invention, the self-locking structure further includes a second limiting portion disposed between the first body and the second body and a second locking portion engaged with the second limiting portion;

the second locking part is connected with or separated from the second limiting part along a first direction, in the locking state, the second locking part is connected with the second limiting part in an inserting mode so as to limit the second machine body to move along a second direction relative to the first machine body, the second direction and the first direction are arranged in an angle mode, and the direction in which the bolt limits or allows the second machine body to be separated from the first machine body is the same as the first direction.

As a further improvement of the embodiment of the present invention, the reset unit includes an elastic element, the first body is provided with a positioning hole, one end of the elastic element is accommodated in the positioning hole, and the other end of the elastic element abuts against the lock tongue.

As a further improvement of the embodiment of the present invention, the lock tongue is pivotally connected to the first body; the edge of spring bolt is provided with the protruding portion, be equipped with the arc spout on the first organism, the protruding portion is in slide in the arc spout in order to drive the spring bolt is changeed between locking state and unblock state.

As a further improvement of the embodiment of the present invention, the locking mechanism further includes a button, the button is disposed on the outer surface of the second body, the button is driven along the direction opposite to the first direction or the direction opposite to the second direction to move the lock tongue from the locking state to the unlocking state.

As a further improvement of the embodiment of the present invention, the lock tongue is pivotally moved between the locked state and the unlocked state, a guide surface which is matched with the button is provided on the lock tongue, and the button is turned into the pivotal movement of the lock tongue along the linear movement in the direction opposite to the second direction through the guide surface.

As a further improvement of the embodiment of the present invention, one end of the lock tongue is pivotally connected to the first body; the other end of spring bolt is equipped with the arc atress face, first spacing portion include with the spacing face of arc atress face shape complex arc, the spacing face of arc with the butt of arc atress face is in order to restrict the second organism is followed first direction motion with first organism separation.

As a further improvement of the embodiment of the present invention, the second locking portion is configured as a protrusion provided on the second body and adjacent to the button; the second limiting portion is configured as a groove, and the groove is arranged on the first machine body to accommodate the protrusion.

As a further improvement of the embodiment of the present invention, the first direction is perpendicular to the second direction.

As a further improvement of the embodiment of the present invention, the locking mechanism further includes a connecting structure, the connecting structure includes a slot provided on the first body and a buckle provided on the second body, the buckle is inserted and located in the slot.

On the other hand, the embodiment of the utility model discloses a dust collector, which comprises a dust collector body and a dust cup component, wherein the locking mechanism is arranged between the dust collector body and the dust cup component; the first machine body is a dust collector machine body, and the second machine body is a dust cup assembly.

The utility model discloses following beneficial effect has: the utility model provides a locking mechanism has realized the detachable connection of first organism and second organism through the mutually supporting of the spring bolt of swing joint at first organism and first spacing portion and the second of setting between first organism and second organism spacing portion, and at the lock-out state, the spring bolt restricts the motion of spring bolt self or second organism respectively with first spacing portion, the spacing butt of second in the spacing direction of difference. When the dust cup assembly is applied to a dust collector, the dust cup assembly can be detached from the dust collector body by unlocking the locking mechanism, so that dust can be conveniently cleaned and the dust cup assembly can be conveniently cleaned; the utility model provides a locking mechanism and have its dust catcher has simple structure compactness, the simple and convenient swift and low in manufacturing cost's of dismouting advantage.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application; wherein:

fig. 1 is a schematic structural view of a self-locking structure of a vacuum cleaner according to an embodiment of the present invention in a locked state;

FIG. 2 is a schematic view of the self-locking mechanism of the vacuum cleaner of FIG. 1 in an unlocked state;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is an analysis of the torque of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 2;

FIG. 6 is a schematic view of the self-locking mechanism of the vacuum cleaner of FIG. 1 in an intermediate state from self-locking to unlocked;

FIG. 7 is an enlarged view of portion C of FIG. 6;

FIG. 8 is a perspective view of a portion of the housing of the cleaner of FIG. 1, showing the configuration of the second limiting portion and its location on the housing;

FIG. 9 is a perspective view of the latch of the self-locking mechanism of the vacuum cleaner of FIG. 1;

reference numerals:

1. a self-locking structure; 11. a first limiting part; 111. an arc-shaped limiting surface; 12. a second limiting part; 13. a second locking portion; 14. a reset unit; 141. an elastic element; 142. positioning holes; 15. a latch bolt; 151. a protrusion; 152. a rotating shaft; 153. an arc stress surface; 154. a guide surface; 2. a first body; 3. a second body; 4. an arc-shaped chute; 41. a trench wall; 5. a button; 6. a connecting structure; 61. a card slot; 62. and (5) buckling.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to the detailed description of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1, an embodiment of the present invention discloses a locking mechanism, as shown in fig. 1 and fig. 2, including a self-locking structure 1 for detachably connecting a first body 2 and a second body 3; in particular implementation, the embodiment of the present invention provides a self-locking mechanism 1 that can be disposed between any two bodies to be connected, and the number of the disposed body is at least one, so as to prevent the tripping phenomenon.

Wherein, as shown in fig. 1 to fig. 9, the self-locking structure 1 includes a lock tongue 15, a first spacing portion 11 matched with the lock tongue 15 and a reset unit 14 abutting against the lock tongue 15, the lock tongue 15 is movably disposed on the first body 2, the first spacing portion 11 is fixed on the second body 3, one end of the lock tongue 15 is movably connected to the first body 2, the other end of the lock tongue 15 is provided with an arc-shaped stress surface 153, the first spacing portion 11 is fixed on the second body 3, the first spacing portion 11 includes an arc-shaped spacing surface 111 matched with the arc-shaped stress surface 153 in shape.

The locking bolt 15 is operable to be switched from a locked state to an unlocked state, the locking bolt 15 is operable to be switched between the unlocked state and the locked state, when the unlocked state is switched to the locked state, the first limiting portion 11 presses the locking bolt 15 and then moves from one side of the locking bolt 15 close to the second machine body 3 to one side of the locking bolt 15 far away from the second machine body 3 along the first direction, the locking bolt 15 pivots and resets under the action of the resetting force of the resetting unit 14 until the arc-shaped force bearing surface 153 of the locking bolt 15 abuts against the arc-shaped limiting surface 111 to limit the second machine body 3 and the first machine body 2 to be separated so as to achieve self-locking, and the first direction D1 is the assembling direction of the first machine body and the second machine body. The reset unit 14 provides a reset force of the latch bolt 15 from the unlocked state to the locked state; in the locked state, the bolt 15 is kept in contact with the first limiting part 11 under the action of the reset force to limit the separation of the second machine body 3 and the first machine body 2; in the unlocked state, the latch 15 is separated from the first position-limiting portion 11 against the above-mentioned restoring force to allow the second body 3 to be separated from the first body 2.

As a further improvement of the embodiment of the present invention, the self-locking structure 1 further includes a second limiting portion 12 disposed between the first body 2 and the second body 3, and a second locking portion 13 engaged with the second limiting portion 12;

the second locking portion 13 is inserted into or separated from the second position-limiting portion 12 along a first direction D1, and in a locked state, the second locking portion 13 is inserted into the second position-limiting portion 12 to limit the second body 3 from moving along a second direction D2 relative to the first body 2, the second direction D2 is disposed at an angle to the first direction D1, and the direction in which the latch 15 limits or allows the second body 3 to be separated from the first body 2 is the same as the first direction D1.

The latch bolt 15 is operable to transition from the locked state to the unlocked state. Specifically, in the present embodiment, the latch bolt 15 is pivotally connected to the first body 2, and the latch bolt 15 rotates about its pivot center to switch between the locked state and the unlocked state, and in the present embodiment, the pivot center O2 is preferably the rotation center of the rotating shaft 152 of the latch bolt 15.

In the locked state, as shown in fig. 3, the latch 15 abuts against the first limiting portion 11 to limit the second machine body 3 to move along the first direction D1, and the second locking portion 13 is connected with the second limiting portion 12 to limit the second machine body 3 to move along the second direction D2; in the unlocked state, referring to fig. 5, the latch 15 is separated from the first position-limiting portion 11 to allow the second body 3 to move in the first direction D1, so that the second locking portion 13 is separated from the second position-limiting portion 12.

In this embodiment, specifically, the reset unit 14 includes an elastic element 141, the first body 2 is provided with a positioning hole 142, one end of the elastic element 141 is received in the positioning hole 142, and the other end of the elastic element 141 abuts against the latch bolt 15. In a specific implementation, the elastic element 141 is preferably a compression spring.

Further, the inside of the latch bolt 15 may also be provided with a positioning hole corresponding to the positioning hole 142 on the first body 2 for receiving the other end of the elastic element 141. In other embodiments, the elastic element may be a torsion spring, and the reset unit may also be a non-elastic element, for example, a principle that like magnetic poles repel each other.

As a further improvement of the embodiment of the present invention, as shown in fig. 8 and 9, the latch 15 is pivotally connected to the first body 2; the edge of the bolt 15 is provided with a protrusion 151, the first body 11 is provided with a sliding groove, corresponding to the pivoting mode of the bolt 15, preferably an arc-shaped sliding groove 4, and the protrusion 151 slides in the arc-shaped sliding groove 4 to drive the bolt 15 to switch between the locking state and the unlocking state; the protrusion 151 cooperates with the second position-limiting portion 12 to limit the rotation of the latch bolt 15 about the rotation shaft 152 thereof.

Specifically, in the locked state, the latch bolt 15 abuts against the first limiting portion 11 to limit the second machine body 3 to move along the first direction D1, the second locking portion 20 cooperates with the second limiting portion 6 to limit the second machine body 3 to move along the second direction D2, and at this time, the latch bolt 15 abuts against the groove wall 41 of the arc-shaped chute 4 to limit the sliding of the latch bolt 15; in the unlocked state, the locking tongue 15 is separated from the first limiting portion 11 to allow the second body 3 to move along the first direction D1, and the locking tongue 15 slides to be separated from the groove wall 41. Preferably, the first stopper portion 11 is L-shaped.

As a further improvement of the embodiment of the present invention, the latch bolt 15 performs the pivotal motion between the locked state and the unlocked state, the guide surface 154 cooperating with the button 6 is provided on the latch bolt 15, and the linear motion of the button 5 in the direction opposite to the second direction D2 is converted into the pivotal motion of the latch bolt 15 by the guide surface 154. In particular implementations, the guide surface 154 may be a sloped surface, a curved surface having an arc, or any shape that may slidingly engage the button 6 to actuate the pivotal movement of the locking bolt.

As a further improvement of the embodiment of the present invention, one end of the lock tongue 15 is pivotally connected to the first body 2; the other end of spring bolt 15 is equipped with arc stress surface 153, and first spacing portion 11 includes the spacing face 111 of arc with arc stress surface 153 shape fit, and the spacing face 111 of arc is with the spacing face 153 butt of arc stress in order to restrict the motion of second organism 3 along first direction D1. The section that the both sides tip of spring bolt 4 is connected with arc stress surface 15 is fan-shaped. As a further improvement of the embodiment of the present invention, as shown in fig. 3, the locking mechanism further includes a button 5, the button 5 is disposed on the outer surface of the second body 3, the button 5 is pressed by a pressing force acting on the latch bolt 15, and the button 5 moves along a direction opposite to the first direction D1 or a direction opposite to the second direction D2 to drive the latch bolt 15 to switch from the locking state to the unlocking state.

In the present embodiment, the button 5 moves in the direction opposite to the second direction D2 to move the latch bolt 15 from the locked state to the unlocked state.

Specifically, when the button 5 is forced, as shown in fig. 6 and 7, to move linearly in the direction opposite to the second direction D2, the guide surface 154 of the latch bolt 15 is forced, and the arc-shaped force-receiving surface 153 of the latch bolt 15 is separated from the arc-shaped position-limiting surface 111 to allow the second body 3 to move in the first direction D1.

After the force pressing the push button 5 disappears, the push button 5 springs back by the reset unit 14. In a specific implementation, the button 5 may also be acted on the latch bolt 15 by a pressing force, and the button 5 may also move in a direction opposite to the first direction D1 to move the latch bolt 4 from the locked state to the unlocked state.

As a further improvement of the embodiment of the present invention, the second locking portion 13 is configured as a protrusion provided on the second body 3 and disposed adjacent to the button 5; the second position-limiting portion 12 is configured as a groove disposed on the first body 2 to receive the protrusion. When the protrusion is received in the groove to achieve the limit of the second body 3 in the first direction D1.

Specifically, fig. 4 is a schematic view of force analysis in the self-locking structure; when in butt joint, the acting force F1 exerted on the bolt 15 by the arc-shaped limiting surface 111 acts on a point P1, the direction extension line of the acting force F1 and the virtual surface L1 intersect at a point O1, and the virtual plane L1 passes through the pivot center O2 of the bolt 15 and is perpendicular to the first direction D1; the direction in which the pivot center O2 of the latch tongue 15 points to the intersection point O1 points to the outside of the first body. Namely, the utility model discloses need to make relevant design to the spacing face 111 of spring bolt 15 and corresponding arc to make the extension line or the reverse extension line of interaction force between the two can pass through the pivot center O2's of spring bolt 15 top (the position that is close to the organism outside is the top).

As shown in fig. 4, the acting force F1 is formed by the sum of a force F1t passing through the pivot center and another force F1n perpendicular to the force F1t, and because of the relative position relationship between the acting force F1 and the pivot center O2, the direction of the another force F1n is directed to the outside of the first body, that is, the another force F1n generates a turning moment M1 relative to the pivot center O2 as shown in the figure, and at this time, the protrusion 151 of the latch 15 is engaged with the slot wall 41 of the slot on the first body 2, and the aforesaid turning moment M1 makes the two engaged more tightly at the engaging surface, so as to achieve the latch self-locking function.

Moreover, in this embodiment, the first limiting portion 11 is L-shaped, and when the protrusion 151 of the lock tongue 15 is engaged with the groove wall 41 of the sliding groove of the first body 2, the first limiting portion 11 can limit the lock tongue 15 from two directions, and the rotation moment M1 can make the engaging surface of the first limiting portion 11 and the close L-shaped lock tongue 15 engage more closely, so that the lock tongue self-locking effect is better.

Of course, in other embodiments, the matching manner during self-locking may be various, for example, the matching manner may also be only one of the two matching manners, and it only needs to satisfy that the lock tongue 15 can be limited in the second direction when the arc-shaped limiting surface 111 abuts against the lock tongue 15.

Fig. 8 also illustrates the range of motion of the stop block, and the maximum limit that can be reached by the stop block. In the highest extreme position, the groove wall 41 of the first body 2 generates a corresponding force F2 at P2. The torque design realizes the purpose of limiting the lock tongue in a labor-saving, efficient and firm manner.

In the present embodiment, the first direction D1 and the second direction D2 are preferably perpendicular to each other.

As the utility model discloses embodiment's further improvement, locking mechanism still includes connection structure 6, and connection structure 6 cooperates in order to be connected first organism 2 and second organism 3 with self-locking structure 1, and connection structure 6 is including setting up draw-in groove 61 on first organism 2 and setting up in the buckle 62 of second organism 3, and buckle 62 inserts and locates in draw-in groove 61. In a specific implementation, the first body 2 and the second body 3 may be connected by providing at least one self-locking structure 1, and more preferably, a single connecting structure 6 is provided at one end of a connection between the first body 2 and the second body 3, the first body 2 and the second body 3 can pivot relatively, and the self-locking structure 1 is provided at the other end of the connection between the first body 2 and the second body 3.

In the present embodiment, specifically, the first direction D1 is a direction in which the second body 3 rotates away from the first body 2 about the connecting structure 6, that is, an assembling direction of the first body 2 and the second body 3.

The utility model provides a locking mechanism has realized the detachable connection of first organism 2 and second organism 3 through the mutually supporting of swing joint at the spring bolt 15 of first organism 2 and first spacing portion 11 and the second spacing portion 12 of setting between first organism 2 and second organism 3. The embodiment of the utility model provides an in, the spring bolt 15 is small, and the preferred 33 x 23.4 x 14.4mm (long x wide x high) of size articulates on the shell of first organism 2 to lock second organism 3, occupation space is less.

On the other hand, as shown in fig. 1 and 2, the embodiment of the present invention discloses a vacuum cleaner, which comprises a vacuum cleaner body and a dust cup assembly, wherein the locking mechanism is arranged between the vacuum cleaner body and the dust cup assembly; the first body 2 is a dust collector body, and the second body 3 is a dust cup assembly. In the embodiment of the utility model, the lock tongue 15 has a small volume, the size is preferably 33 × 23.4 × 14.4mm (length × width × height), the dust cup component is locked, and the occupied space is small; the latch bolt 15 is fixed on the shell of the cleaner body and connected with the shell of the cleaner body in a hinge mode.

The utility model discloses following beneficial effect has: the utility model provides a locking mechanism has realized the detachable connection of first organism and second organism through the mutually supporting of the spring bolt and the first spacing portion of swing joint at first organism and the spacing portion of second of setting between first organism and second organism, at lock-out state, the spring bolt respectively with first spacing portion, the spacing portion butt of second restricts the motion of spring bolt self or second organism in the spacing direction of difference, especially, the mode of effort process spring bolt pivot center top is designed into to the stress surface of first spacing portion, can carry out the effectual auto-lock of spring bolt. When the dust cup assembly is applied to a dust collector, the dust cup assembly can be detached from the dust collector body by unlocking the locking mechanism, so that dust can be conveniently cleaned and the dust cup assembly can be conveniently cleaned; the utility model provides a locking mechanism and have its dust catcher has simple structure compactness, the simple and convenient swift and low in manufacturing cost's of dismouting advantage.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the feasible embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. A locking mechanism is characterized by comprising a self-locking structure (1) which is used for detachably connecting a first machine body (2) and a second machine body (3);

the self-locking structure (1) comprises a lock tongue (15), a first limiting part (11) matched with the lock tongue (15) and a reset unit (14) abutting against the lock tongue, one end of the lock tongue (15) is pivotally connected to the first machine body (2), the other end of the lock tongue (15) is provided with an arc-shaped stress surface (153), the first limiting part (11) is fixed on the second machine body (3), and the first limiting part (11) comprises an arc-shaped limiting surface (111) matched with the arc-shaped stress surface (153) in shape;

the lock tongue (15) can be switched between an unlocking state and a locking state, when the unlocking state is switched to the locking state, the lock tongue pivots after the first limiting part presses the lock tongue, the first limiting part moves from one side, close to the second machine body, of the lock tongue to one side, far away from the second machine body, of the lock tongue along a first direction, the lock tongue pivots and resets under the action of resetting force of the resetting unit, and the lock tongue is limited by at least one of the first machine body or the second machine body after the arc-shaped force bearing surface (153) of the lock tongue abuts against the arc-shaped limiting surface (111);

in the locked state, an intersection (O1) is formed between a direction extension line of an acting force (F1) applied to the arc force-bearing surface (153) by the arc limiting surface (111) and a virtual plane (L1), a direction in which a pivot center (O2) of the lock tongue points to the intersection (O1) points to the outside of the first body, the virtual plane (L1) passes through the pivot center of the lock tongue and is perpendicular to the first direction, and the first direction (D1) is an assembling direction of the first body and the second body.

2. The locking mechanism according to claim 1, wherein the self-locking structure (1) further comprises a second limiting portion (12) arranged between the first body (2) and the second body (3) and a second locking portion (13) cooperating with the second limiting portion (12);

the second locking portion (13) is connected with or separated from the second limiting portion in an inserting mode along the first direction, in the locking state, the second locking portion (13) is connected with the second limiting portion (12) in an inserting mode to limit the second machine body (3) to move along a second direction relative to the first machine body, the second direction and the first direction are arranged in an angle mode, and the direction in which the bolt (15) limits or allows the second machine body (3) to be separated from the first machine body is the same as the first direction.

3. The locking mechanism according to claim 1, wherein the reset unit (14) comprises an elastic element (141), the first body (2) is provided with a positioning hole (142), one end of the elastic element (141) is received in the positioning hole (142), and the other end of the elastic element (141) abuts against the bolt (15).

4. The locking mechanism according to claim 1, wherein a protrusion (151) is disposed on an edge of the latch tongue (15), a sliding slot (4) is disposed on the first body (2), and the protrusion (151) slides in the sliding slot (4) to drive the latch tongue (15) to switch between the locking state and the unlocking state.

5. The locking mechanism according to claim 2, further comprising a button (5), wherein the button (5) is disposed on an outer surface of the second body (3), and wherein movement of the button (5) in a direction opposite to the first direction or in a direction opposite to the second direction moves the locking tongue (15) from the locked state to the unlocked state.

6. The locking mechanism according to claim 5, characterized in that the locking bolt (15) is pivotally movable between the locked state and the unlocked state, a guide surface (154) cooperating with the button (5) being provided on the locking bolt (15), a linear movement of the button (5) in a direction opposite to the second direction being converted into a pivotal movement of the locking bolt (15) by means of the guide surface (154).

7. Locking mechanism according to claim 5, characterized in that the second locking portion (13) is configured as a protrusion provided on the second body (3) adjacent to the button (5); the second limiting portion (12) is configured as a groove which is arranged on the first body (2) to accommodate the protrusion.

8. The latch mechanism of claim 2 wherein said first direction is perpendicular to said second direction.

9. The locking mechanism according to claim 1, further comprising a connecting structure (6), wherein the connecting structure (6) comprises a slot (61) disposed on the first body (2) and a buckle (62) disposed on the second body (3), and the buckle (62) is inserted into the slot (61).

10. The latch mechanism of claim 1 wherein said first limit stop is L-shaped.

11. The locking mechanism according to claim 1, wherein in the locked state, the latch bolt (15) is kept in abutment with the first limiting portion (11) under the action of a resetting force of the resetting unit to limit the separation of the second body (3) from the first body in a first direction, the direction of the resetting force being different from the first direction; in an unlocking state, the lock tongue (15) is operable to overcome the action of the reset force to separate from the first limiting part (11) so as to allow the second machine body (3) to separate from the first machine body, and the first direction is an assembling direction of the first machine body and the second machine body.

12. A vacuum cleaner comprising a cleaner body and a dirt cup assembly, wherein a locking mechanism according to any one of claims 1-11 is provided between the cleaner body and the dirt cup assembly; the first machine body (2) is a dust collector machine body, and the second machine body (3) is a dust cup assembly.