Lock catch mechanism and kitchen ware cleaning equipment

Abstract

The utility model provides a lock catch mechanism and kitchen ware cleaning equipment, the lock catch mechanism comprises a base, a lock body and a lock arm, the base is installed on one of a machine body and a piece to be locked; the lock body is installed on the other one of the machine body and the to-be-locked piece and comprises a blocking resisting part, an expanding part and a locking groove between the blocking resisting part and the expanding part. The lock arm is movably connected to the base and comprises a lock catch part; when the lock catch part is located in the locking groove, the side, close to the blocking resisting part, of the expansion part abuts against the lock catch part in a hooked mode. The resistance rejection part obliquely extends outwards relative to the bottom of the locking groove in the posture of being far away from the expansion part and is used for guiding the lock catch part to move towards the locking groove. Even if the lock catch part is accidentally separated from the locking groove and is in contact with the resistance rejection part due to excessive force when the to-be-locked piece closes the machine body, the resistance rejection part can also provide a boosting effect on the lock catch part so as to enable the lock catch part to return to the locking groove, finally, the lock catch mechanism is automatically switched into the locking state again, and the lock catch part also continues to be located in the locking groove. And the condition that the machine body is opened without ends is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to a locking mechanism and kitchenware cleaning equipment. Background Art

[0002] Many electrical appliances are equipped with locking mechanisms, such as cleaning cabinets, disinfection cabinets, and dishwashers, which all use locking mechanisms to lock the machine body and the door panel to be locked. The existing locking mechanisms have the problem that the machine body and the door panel to be locked cannot be tightly closed. When the locking mechanism is switched to the locked state, the door panel to be locked can still move relative to the machine body, causing the inner cavity of the machine body to be opened without reason, thereby affecting the cleaning of the inner cavity of the machine body. Utility Model Content

[0003] In view of this, the utility model provides a locking mechanism and a kitchen utensil cleaning device which can enable a to-be-locked part to more tightly close a machine body.

[0004] The locking mechanism provided by the utility model comprises:

[0005] A base mounted on one of the body and the part to be locked;

[0006] A lock body is installed on the other of the body and the part to be locked, and the lock body includes a blocking portion, an expansion portion, and a locking groove between the blocking portion and the expansion portion;

[0007] A locking arm is movably connected to the base, and the locking arm includes a locking portion;

[0008] When the locking part is located in the locking groove, the side of the expansion part close to the resistance part is hooked against the locking part;

[0009] The blocking portion is inclined and extended outward relative to the bottom of the locking groove in a posture away from the expansion portion, so as to guide the locking portion to move toward the locking groove.

[0010] The beneficial effect of the utility model is that when the lock part enters the locking groove and the lock mechanism is switched to the locked state, the lock part moves away from the expansion part and approaches the resistance part to escape from the locking groove, and the freedom of movement can be restricted by the resistance part. Even if the lock part accidentally escapes from the locking groove and contacts the resistance part due to excessive force when the lock piece is used to close the body, the resistance part can also provide a boosting effect on the lock part. The boosting effect of the resistance part allows the lock part to move close to the expansion part until it returns to the locking groove. Finally, the lock mechanism can automatically switch to the locked state again, and the lock part will continue to remain in the locking groove, so that the lock piece continues to close the body to prevent the body from being opened without reason.

[0011] In one embodiment, a side of the expansion portion closer to the blocking portion is inclined and extends outward relative to the bottom of the locking groove in a posture away from the blocking portion.

[0012] With such arrangement, when the locking element needs to open the body, a smaller force can be applied to the locking element and / or the body to make the locking portion move relative to the expansion portion in a direction away from the blocking portion, so that the locking portion is disengaged from the locking groove and the locking portion is separated from the entire lock body.

[0013] In one embodiment, the lock body includes a necked portion disposed between the resisting portion and the expanding portion, the necked portion is concave to form a locking groove, and the resisting portion and the expanding portion are connected by a curved surface transition.

[0014] With such an arrangement, the locking portion can enter the locking groove more smoothly, which helps to reduce the wear of the locking portion and the lock body, thereby improving the durability of the locking portion and the lock body.

[0015] In one embodiment, the locking portion includes an avoidance chamfer, which is configured as follows: when the locking portion is located in the locking groove, the avoidance chamfer is located on a side of the locking portion close to the expansion portion, and is inclined relative to the bottom of the locking groove in a posture away from the resistance portion.

[0016] With such arrangement, when the locking part is extended into the locking groove, the interference and extrusion between the locking part and the expansion part can be improved, and the resistance of the locking part to sliding along the avoidance chamfer can be reduced, which is conducive to the locking part sliding along the avoidance chamfer with a small force to disengage from the locking groove, and then wait for the locking piece to open the body.

[0017] In one embodiment, when the locking portion is located in the locking groove, the avoidance chamfer and the expansion portion are spaced apart.

[0018] With such arrangement, when the locking portion is inserted into the locking groove, there will be no interference or squeezing between the locking portion and the expansion portion.

[0019] In one embodiment, the locking portion includes a flared chamfer, which is configured such that when the locking portion is located in the locking groove, the flared chamfer is located on a side of the locking portion close to the blocking portion and is inclined relative to the bottom of the locking groove in a posture away from the expansion portion.

[0020] With such arrangement, when the locking device needs to close the machine body, the side of the expanded portion away from the resistance portion can apply a thrust to the flared chamfer. Only a small thrust is needed to drive the locking portion to passively avoid the expanded portion. Then the locking portion continues to move along the expanded portion toward the resistance portion and slides into the locking groove.

[0021] In one embodiment, when the locking portion is located in the locking groove, the flared chamfer and the blocking portion are spaced apart.

[0022] With such arrangement, when the locking part is extended into the locking groove, the interference and extrusion between the locking part and the resisting part can be improved. If the force used by the locking element to close the body is large, the locking part is allowed to slide a certain distance along the resisting part in the direction away from the expansion part, which is helpful to alleviate the impact force between the locking part and the resisting part, and avoid the resisting part being damaged by a large impact from the locking part.

[0023] In one embodiment, when the locking portion is located in the locking groove, the blocking portion abuts against a side of the locking portion away from the expansion portion; and / or,

[0024] When the locking portion is located in the locking groove, the expansion portion abuts against a side of the locking portion that is away from the blocking portion.

[0025] In this way, the resisting portion exerts a limiting effect on the locking portion by resisting the locking portion, so as to limit the locking portion from being separated from the locking groove in the direction away from the expansion portion; the expansion portion exerts a limiting effect on the locking portion by resisting the locking portion, so as to limit the locking portion from being separated from the locking groove in the direction away from the resisting portion.

[0026] In one embodiment, it also includes an elastic member, and the locking arm is rotatably connected to the base, including a force-bearing portion connected to the elastic member, and the position where the locking arm is connected to the base is located between the force-bearing portion and the locking portion. The elastic member can accumulate potential energy when the locking portion moves along the resistance portion away from the expansion portion, and can release the potential energy to drive the locking portion to move along the resistance portion close to the locking groove.

[0027] With such a configuration, when the locking portion disengages from the locking groove and contacts the resisting portion, the force applied to the locking arm by the elastic member can drive the locking portion to return to the locking groove, thereby realizing that the locking mechanism spontaneously switches to a locked state. When external interference acts on the part to be locked and / or the body, the force applied to the locking arm by the elastic member can help the locking portion to maintain a state of extending into the locking groove, thereby preventing the locking portion from accidentally disengaging from the locking groove and then from the lock body, which can effectively prevent the part to be locked from accidentally opening the body.

[0028] The kitchenware cleaning device provided by the utility model comprises a cabinet body, a door cover and the locking mechanism thereof, wherein the base is installed on one of the cabinet body and the door cover, and the lock body is installed on the other of the cabinet body and the door cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of a locking mechanism of an embodiment of the utility model at a first viewing angle;

[0030] Figure 2 A partial structural schematic diagram of a locking mechanism according to an embodiment of the utility model;

[0031] Figure 3 It is a structural schematic diagram of a locking mechanism of an embodiment of the utility model at a second viewing angle;

[0032] Figure 4 for Figure 3 The locking mechanism shown is a cross-sectional view after being cut along the B-B plane.

[0033] Explanation of reference numerals: 100, locking mechanism; 10, base; 11, seat body; 12, limiting portion; 13, mounting portion; 20, lock body; 21, blocking portion; 22, necking portion; 221, locking groove; 23, expansion portion; 30, locking arm; 31, force-bearing portion; 32, bending portion; 321, side groove; 33, locking portion; 3311, avoidance chamfer; 3312, expansion chamfer; 34, chamber; 35, opening and closing mouth; 40, elastic member DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0036] The utility model provides a locking mechanism 100 that can be used in equipment such as a cleaning cabinet, a disinfection cabinet, and a dishwasher. In addition, a kitchenware cleaning device equipped with the locking mechanism 100 of the utility model is provided. The kitchenware cleaning device can be any one of the cleaning cabinet, the disinfection cabinet, and the dishwasher, or other types of kitchenware cleaning devices. Generally, equipment such as cleaning cabinets, disinfection cabinets, and dishwashers include a body and a part to be locked. The body is hollow inside to form a cavity for washing or placing kitchenware. The part to be locked can be movably installed on the body, which can be a cabinet door, and can open the body to open the cavity, and close the body to close the cavity.

[0037] The purpose of the locking mechanism 100 of the utility model is that the locking mechanism 100 has a locked state and an unlocked state. When the body is in a state of being closed by the locked part, the locking mechanism 100 in the locked state is used to limit and constrain the position and posture of the locked part and the body to prevent the locked part from opening the body. When the locked part is required to open the body, the locking mechanism 100 is switched to the unlocked state, thereby canceling the position and posture and limitation of the locked part and the body.

[0038] See also Figure 1-2 The lock mechanism 100 of the utility model comprises a base 10, a lock body 20, a lock arm 30 and an elastic member 40. The base 10 is installed on one of the machine body and the member to be locked, and the lock body 20 is installed on the other of the machine body and the member to be locked. Figure 3-4 The lock body 20 includes an expansion portion 23, a necking portion 22 and a resistance portion 21 arranged in sequence. The lock arm 30 is rotatably connected to the base 10, including a locking portion 33 and a force-bearing portion 31. The position where the lock arm 30 is rotatably connected to the base 10 is located between the locking portion 33 and the force-bearing portion 31. The elastic member 40 is connected to the force-bearing portion 31 and is in a compressed state, and pressure is applied to the force-bearing portion 31. The elastic member 40 releases potential energy during the stretching deformation process and does work on the force-bearing portion 31 to drive the lock arm 30 to rotate.

[0039] Figure 1 to Figure 4 In the illustrated embodiment, the lock mechanism 100 is in a locked state, the base 10 is fixedly mounted on the machine body, the lock body 20 is fixedly mounted on the part to be locked, there are two lock arms 30, the elastic member 40 is located between the two lock arms 30, and the two ends of the elastic member 40 are respectively connected to the force-bearing parts 31 of the two lock arms 30, a chamber 34 for accommodating the expansion part 23 is formed between the two lock arms 30, and an opening 35 communicating with the chamber 34 is formed between the lock parts 33 of the two lock arms 30, and the opening 35 is used for the lock body 20 to extend into so that the expansion part 23 enters the chamber 34. The elastic member 40 releases potential energy during the extension deformation process and simultaneously acts on the force-bearing parts 31 of the two lock arms 30, so that the two force-bearing parts 31 move away from each other, and at the same time, the two lock parts 33 move relatively close to each other to reduce the opening 35.

[0040] It can be understood that in other embodiments, the base 10 can also be fixedly installed on the part to be locked, and the lock body 20 can also be fixedly installed on the body; the locking arm 30 is not limited to being rotatably connected to the base 10, but can also be connected to the base 10 by other movable connection methods; the number of locking arms 30 is not limited to two, but can also be one, three or more, as long as the elastic member 40 can release potential energy during the extension deformation process and convert it into work done on the locking arm 30, thereby driving the locking portion 33 to move.

[0041] See also Figure 1-2 , Figure 4The base 10 includes a base 11 fixedly mounted on the machine body, a limiting portion 12 fixedly connected to the base 11, and a mounting portion 13 is fixedly arranged at one end of the limiting portion 12 relatively far from the base 11. The locking arm 30 also includes a bending portion 32 located between the locking portion 33 and the force-bearing portion 31. The bending portion 32 is integrally connected to the locking portion 33 and the force-bearing portion 31 and has a side groove 321. The mounting portion 13 is located in the side groove 321 and serves as a fulcrum of the locking arm 30. The bending portion 32 is rotatably connected to the mounting portion 13. When the elastic member 40 is stretched and deformed, it applies force to the force-bearing portion 31, driving the locking arm 30 to rotate around the mounting portion 13. In the process of switching the locking mechanism 100 from the unlocking state to the locking state, the lock body 20 can apply force to the locking portion 33 to drive the locking arm 30 to rotate around the mounting portion 13, and at the same time, the locking arm 30 compresses the elastic member 40 through the force-bearing portion 31.

[0042] The necking portion 22 is recessed inward relative to the expanding portion 23 and the resisting portion 21 to form a locking groove 221. Figure 1 to Figure 4 In the illustrated embodiment, the lock body 20 is similar to an axial structure, and the blocking portion 21, the necked portion 22 and the expanded portion 23 are coaxially arranged in sequence with the axis of the lock body 20 as a common axis and fixedly connected as a whole. The outer surface of the expanded portion 23, the outer surface of the necked portion 22 and the outer surface of the blocking portion 21 together form a turning surface that is similar to a V shape, wherein the V-shaped bottom of the turning surface is the outer surface of the necked portion 22 and constitutes the bottom of the locking groove 221. There are two limiting portions 12 and two mounting portions 13, and the two limiting portions 12 are symmetrically arranged about the axis of the lock body 20, and the two mounting portions 13 are symmetrically arranged about the axis of the lock body 20, and the two locking arms 30 are approximately symmetrically arranged about the axis of the lock body 20, and the axis of the lock body 20 approximately passes through the opening 35.

[0043] Specifically, when the locking mechanism 100 is in the unlocked state, the locking element has not yet closed the body, the lock body 20 has not yet entered between the two locking arms 30, and the expansion portion 23 is still outside the chamber 34. Optionally, in some embodiments, when the locking mechanism 100 is in the unlocked state, although the elastic member 40 is still in a state of being compressed by the force-bearing portions 31 of the two locking arms 30, the elastic member 40 is in the maximum extension size, that is, at this time, the potential energy accumulated by the elastic member 40 reaches a minimum level, and the compression deformation is also a minimum level; when the locking mechanism 100 is in the locked state, the locking element closes the body, such as Figure 1-2 , Figure 4 As shown, at least a portion of the lock body 20 enters between the two locking arms 30, the expansion portion 23 is located in the chamber 34, the necking portion 22 is located in the opening 35 and between the two locking portions 33, and the elastic member 40 is contracted. At this time, the potential energy accumulated in the elastic member 40 is also increased. In particular, at this time, the locking portion 33 is located in the locking groove 221.

[0044] The present invention defines that when the locking mechanism 100 is in the locked state, that is, when the locking portion 33 is located in the locking groove 221, the side of the expansion portion 23 close to the blocking portion 21 is hooked and connected with the locking portion 33. Specifically, at this time, at least a portion of the side of the locking portion 33 away from the blocking portion 21 is in contact with the side of the expansion portion 23 close to the blocking portion 21. Figure 1 and Figure 4 When external force acts on the part to be locked and / or the body and attempts to drive the lock body 20 to move in a direction away from the base 10, the pressure of the side of the expansion part 23 close to the resistance part 21 acting on the side of the lock part 33 away from the resistance part 21 increases accordingly. Therefore, the pressure between the expansion part 23 and the lock part 33 can ensure that the lock mechanism 100 will not switch to the unlocked state within a certain force range until the external force acting on the part to be locked and / or the body exceeds the upper limit of the force range, so that the lock part 33 is pushed by the expansion part 23 to leave the locking groove 221, so that the lock mechanism 100 switches to the unlocked state.

[0045] The present invention further defines that the blocking portion 21 extends outwardly at an angle relative to the bottom of the locking groove 221 in a posture away from the expansion portion 23. Figure 1 and Figure 4 The blocking portion 21 is similar to a slope surface, and the entire blocking portion 21 is inclined relative to the necking portion 22, and is also inclined relative to the axis of the lock body 20. In the direction away from the expansion portion 23, the distance from the blocking portion 21 to the axis of the lock body 20 tends to increase, and the blocking portion 21 is generally inclined relative to the necking portion 22 toward the side of the necking portion 22 away from the expansion portion 23. In this way, the resistance part 21 can guide the locking part 33 to move toward the locking groove 221. When the lock body is closed with greater force, the lock body 20 and the base 10 approach each other at a faster speed, causing the locking groove 221 to slide into the locking groove 221 and then further slide to the resistance part 21 due to inertia. The contact pressure of the resistance part 21 on the locking part 33 generates a component force pointing to the expansion part 23, thereby allowing the locking part 33 to obtain an acceleration pointing to the expansion part 23. Finally, the locking part 33 returns along the resistance part 21 in the direction close to the expansion part 23 until it reaches the locking groove 221 again.

[0046] In some embodiments, it is further defined that: the side of the expansion portion 23 closer to the blocking portion 21 extends outwardly obliquely relative to the bottom of the locking groove 221 in a posture away from the blocking portion 21. Figure 1 and Figure 4The end of the lock body 20 for forming the expansion part 23 is similar to a sphere, and the expansion part 23 is similar to a spherical surface. The spherical surface can be roughly divided into a first hemispherical surface arranged relatively far from the necked part 22 and a second hemispherical surface arranged relatively close to the necked part 22. The second hemispherical surface is similar to a plurality of slope surfaces arranged around the axis of the lock body 20, that is, the second hemispherical surface is inclined relative to the necked part 22, and is also inclined relative to the axis of the lock body 20. In this way, the second hemispherical surface can guide the lock part 33 to quickly slide into the locking groove 221. In the process of the lock element closing the body, the first hemispherical surface first exerts pressure on the locking arm 30, driving the two locking arms 30 to rotate and compress the elastic member 40, thereby expanding the opening 35 to allow the expansion part 23 to enter, and then the lock part 33 slides along the first hemispherical surface in a direction close to the blocking part 21, and then the lock part 33 passes through the boundary circle between the first hemispherical surface and the second hemispherical surface, and then continues to slide along the second hemispherical surface into the locking groove 221.

[0047] Specifically, Figure 4 For example, the first hemispherical surface is the hemispherical surface of the lower part of the expansion portion 23 , and the second hemispherical surface is the hemispherical surface of the upper part of the expansion portion 23 .

[0048] Furthermore, in some embodiments, when the locking portion 33 is located in the locking groove 221, the elastic member 40 is still in a compressed state, so the elastic member 40 still exerts pressure on the force-bearing portion 31, and the pressure makes both locking arms 30 have a tendency to rotate relative to the base 10, and the rotation tendency has a tendency to reduce the opening of the opening 35. Under the effect of the tendency of the opening 35 to shrink, the locking portion 33 abuts against the necking portion 22. Specifically, at this time, the position where the necking portion 22 abuts against the locking portion 33 is located at the V-shaped bottom of the V-shaped turning surface formed by the expansion portion 23, the necking portion 22, and the blocking portion 21, and the opening of the opening 35 is at the minimum state.

[0049] Optionally, in some embodiments, the necking portion 22 is connected to the blocking portion 21 through a curved surface transition, and is connected to the expanding portion 23 through a curved surface transition. Figure 4 The second hemispherical surface of the necked portion 22 and the expanded portion 23 are connected by a rounded transition, and the necked portion 22 and the resisting portion 21 are connected by a rounded transition. With this arrangement, the lock portion 33 can slide into the locking groove 221 more smoothly. Even if the lock is closed with too much force, causing the lock portion 33 to slide further to the resisting portion 21 after reaching the locking groove 221, the impact force and friction force of the resisting portion 21 on the lock portion 33 can be reduced, which is conducive to reducing the wear degree of the lock portion 33 and the lock body 20, thereby improving the durability of the lock portion 33 and the lock body 20.

[0050] Optionally, in some embodiments, the locking portion 33 includes an avoidance chamfer 3311 and a flaring chamfer 3312, and the avoidance chamfer 3311 and the flaring chamfer 3312 are similar to two inclined surfaces arranged in a substantially V-shape, see Figure 1 and Figure 4 When observing the lock mechanism 100 in a direction perpendicular to the axis of the lock body 20 , the lock portion 33 is approximately triangular, and the two lock portions 33 are respectively protruded on the sides of the two lock arms 30 facing each other. When the locking mechanism 100 is in a locked state, that is, when the locking portion 33 is located in the locking groove 221, the avoidance chamfer 3311 is located on the side of the locking portion 33 close to the expansion portion 23. Specifically, the avoidance chamfer 3311 is located on the side of the locking portion 33 close to the second hemisphere, and the avoidance chamfer 3311 is inclined relative to the necking portion 22 in a posture away from the resistance portion 21, that is, the avoidance chamfer 3311 is inclined to the side of the necking portion 22 relatively away from the resistance portion 21; the flaring chamfer 3312 is located on the side of the locking portion 33 close to the resistance portion 21, and the flaring chamfer 3312 is inclined relative to the necking portion 22 in a posture away from the expansion portion 23, that is, the flaring chamfer 3312 is inclined to the side of the necking portion 22 relatively away from the expansion portion 23.

[0051] When the lock mechanism 100 is in a locked state, when an external force acts on the to-be-locked part and / or the body and attempts to drive the lock body 20 to move in a direction away from the base 10 so that the expanded portion 23 leaves the chamber 34, the expanded portion 23 is hooked and connected to the avoidance chamfer 3311 through the second hemispherical surface. Within a certain force range, the avoidance chamfer 3311 can still be fixedly pressed against the second hemispherical surface to prevent the expanded portion 23 from leaving the chamber 34. When the external force acting on the to-be-locked part and / or the body exceeds When the upper limit of the force range is exceeded, the avoidance chamfer 3311 slides relative to the second hemispherical surface, and the pressure of the second hemispherical surface on the avoidance chamfer 3311 gradually pushes the locking portion 33 away from the locking groove 221, causing the locking arm 30 to rotate and compress the elastic member 40. Finally, the size of the opening 35 is expanded to allow the expansion portion 23 to detach from the chamber 34. The expansion portion 23 leaves the chamber 34 and completely detaches from the locking arm 30, completing the switching of the locking mechanism 100 to the unlocked state.

[0052] When the locking mechanism 100 is in the unlocked state, when an external force acts on the locked part and / or the body and attempts to drive the expansion part 23 to push the locking arm 30 so that the opening 35 expands and allows the expansion part 23 to enter the chamber 34, the expansion part 23 first abuts against the expansion chamfer 3312 through the first hemispherical surface and pushes the locking part 33. The pressure of the first hemispherical surface on the expansion chamfer 3312 provides a component force that moves the two locking parts 33 away from each other. As the first hemispherical surface continues to abut and push the expansion chamfer 3312, the two locking arms 30 are 0 rotates and gradually compresses the elastic member 40, the opening of the opening 35 gradually increases, the locking portion 33 slides along the first hemispherical surface and gradually approaches the second hemispherical surface. When the locking portion 33 reaches the boundary circle between the first hemispherical surface and the second hemispherical surface, the elastic member 40 is in a state where the compression amount reaches the maximum, and the accumulated potential energy reaches a peak value. Then the elastic member 40 quickly stretches and releases the potential energy, and the locking arm 30 rotates and quickly shrinks the opening 35, so that the expansion portion 23 enters the chamber 34 and completes the switching of the locking mechanism 100 to the locked state.

[0053] Optional, see Figure 4 When the lock portion 33 is located in the locking groove 221, the avoidance chamfer 3311 is spaced apart from the second hemispherical surface of the expansion portion 23. With this arrangement, when the lock portion 33 slides along the second hemispherical surface and has not yet entered the locking groove 221, it can be avoided that the lock portion 33 stays at a certain position on the second hemispherical surface and no longer continues to slide; similarly, when the lock portion 33 is located in the locking groove 221, the expansion chamfer 3312 is spaced apart from the resistance portion 21. With this arrangement, when the lock portion 33 reaches the locking groove 221 and continues to slide toward the resistance portion 21, it can be avoided that the expansion chamfer 3312 first contacts the resistance portion 21, thereby restricting the lock portion 33 from further sliding along the resistance portion 21, for example, when the lock piece is to be locked to close the body. If too much force is used, the locking portion 33 may be allowed to slide along the resistance portion 21 for a certain distance, thereby allowing the locking arm 30 to rotate relatively and compress the elastic member 40. As the potential energy of the elastic member 40 increases, the kinetic energy of the locking portion 33 sliding relative to the resistance portion 21 decreases and is converted into the potential energy of the elastic member 40, thereby achieving the effect of buffering the locking portion 33 and the resistance portion 21, so that the locking portion 33 can return to the locking groove 221 as soon as possible. When the locking portion 33 is located at the resistance portion 21 and the kinetic energy of the locking portion 33 sliding relative to the resistance portion 21 is reset, the elastic member 40 can stretch and deform again and release the potential energy, which will be converted into the kinetic energy required for the locking portion 33 to approach the expansion portion 23 and return to the locking groove 221.

[0054] In some embodiments not shown in the drawings, when the locking portion 33 is located in the locking groove 221 , the blocking portion 21 abuts against a side of the locking portion 33 away from the expansion portion 23 .

[0055] In some embodiments not shown in the figures, when the locking portion 33 is located in the locking groove 221, the expansion portion 23 abuts against the side of the locking portion 33 away from the blocking portion 21. Specifically, the second hemispherical surface abuts against the side of the locking portion 33 away from the blocking portion 21.

[0056] Furthermore, when the lock portion 33 is located in the locking groove 221, the blocking portion 21 abuts against the side of the lock portion 33 away from the expansion portion 23, and the expansion portion 23 abuts against the side of the lock portion 33 away from the blocking portion 21. In this way, the lock portion 33 can abut against the necked portion 22 at a unique and fixed position, and the relative position of the lock portion 33 and the necked portion 22 can be kept unchanged for a long time, which is conducive to maintaining a tight and reliable closed state between the locked part and the body for a long time.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A locking mechanism, characterized in that: include: A base (10) mounted on one of the body and the part to be locked; A lock body (20) is installed on the other of the machine body and the part to be locked, the lock body (20) comprising a blocking portion (21), an expansion portion (23) and a locking groove (221) between the blocking portion (21) and the expansion portion (23); A locking arm (30) movably connected to the base (10), wherein the locking arm (30) comprises a locking portion (33); When the locking portion (33) is located in the locking groove (221), the side of the expansion portion (23) close to the blocking portion (21) is hooked against the locking portion (33); The resisting portion (21) is inclined and extends outward relative to the bottom of the locking groove (221) in a posture away from the expanding portion (23), so as to guide the locking portion (33) to move toward the locking groove (221).

2. The locking mechanism according to claim 1, characterized in that: The side of the expansion portion (23) that is relatively close to the resistance portion (21) is inclined and extends outward relative to the bottom of the locking groove (221) in a posture away from the resistance portion (21).

3. The locking mechanism according to claim 1, characterized in that: The lock body (20) comprises a necked portion (22) disposed between the resistance portion (21) and the expansion portion (23); the necked portion (22) is concave to form the locking groove (221), and the resistance portion (21) and the expansion portion (23) are connected via a curved transition.

4. The locking mechanism according to claim 1, characterized in that: The locking portion (33) includes an avoidance chamfer (3311), and the avoidance chamfer (3311) is configured as follows: when the locking portion (33) is located in the locking groove (221), the avoidance chamfer (3311) is located on a side of the locking portion (33) close to the expansion portion (23), and is inclined relative to the bottom of the locking groove (221) in a posture away from the resistance portion (21).

5. The locking mechanism according to claim 4, characterized in that: When the locking portion (33) is located in the locking groove (221), the avoidance chamfer (3311) and the expansion portion (23) are spaced apart.

6. The locking mechanism according to claim 1, characterized in that: The locking portion (33) includes a flared chamfer (3312), and the flared chamfer (3312) is configured as follows: when the locking portion (33) is located in the locking groove (221), the flared chamfer (3312) is located on a side of the locking portion (33) close to the blocking portion (21), and is inclined relative to the bottom of the locking groove (221) in a posture away from the expanded portion (23).

7. The locking mechanism according to claim 6, characterized in that: When the locking portion (33) is located in the locking groove (221), the flared chamfer (3312) and the blocking portion (21) are spaced apart.

8. The locking mechanism according to claim 1, characterized in that: When the locking portion (33) is located in the locking groove (221), the blocking portion (21) abuts against a side of the locking portion (33) that is away from the expansion portion (23); and / or, When the locking portion (33) is located in the locking groove (221), the expansion portion (23) abuts against a side of the locking portion (33) that is away from the blocking portion (21).

9. The locking mechanism according to claim 1, characterized in that: The invention also comprises an elastic member (40), wherein the elastic member (40) is capable of storing potential energy when the locking portion (33) moves along the resisting portion (21) away from the expanding portion (23), and is capable of releasing the potential energy to drive the locking portion (33) to move along the resisting portion (21) toward the locking groove (221).

10. A kitchenware cleaning device, characterized in that: It comprises a cabinet, a door cover and a locking mechanism according to any one of claims 1 to 9, wherein the base (10) is installed on one of the cabinet and the door cover, and the lock body (20) is installed on the other of the cabinet and the door cover.

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