Door lock structure for household appliances and household appliances

Abstract

The present invention relates to a door lock structure for household appliances, comprising a housing; a lock rod; a lock buckle, the lock buckle comprising a first lock arm, a second lock arm and a second elastic member, the first lock arm and the second lock arm are arranged opposite to each other and both extend in a first direction, and the relative wall surfaces of the first lock arm and the second lock arm are both arc-shaped surfaces arched in a direction away from each other, so that a limiting groove in which a columnar body of the lock rod can be inserted is formed between the first lock arm and the second lock arm, and a spacing is formed between the end of the first lock arm facing the lock opening and the end of the second lock arm facing the lock opening to form a through hole for the columnar body to penetrate into the limiting groove, and the second lock arm always maintains a tendency to move closer to the first lock arm under the action of the second elastic member; when the columnar body is located in the limiting groove, the lock buckle is partially located on the path of the columnar body moving in the positive direction along the first direction; a mounting frame; a first elastic member; a positioning member; and an unlocking mechanism. The door body has high locking reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a door lock structure for household appliances and the household appliance. Background Art

[0002] For cabinets with functional inner cavities, such as dishwashers, steamers, ovens, etc., due to functional requirements, a door body that can open or cover the port is usually provided at the port of the cabinet, and the door body needs to be locked relative to the cabinet during use of the cabinet.

[0003] For example, the Chinese invention patent application with application number CN200410043122.5, "Door switch mechanism and dishwasher having the door switch mechanism" (application publication number: CN1550202A), discloses a structure, which includes: a door configured to be rotatable for opening and closing the tableware inlet provided on the dishwasher, and a rotation assist mechanism that applies a rotation assist force to the door along with the rotation of the door; the rotation assist mechanism applies a rotation assist force to the door in the closing direction when the door is within a specified angle range from the closed state. Although the above structure can lock the door body on the dishwasher, its locking structure is complex, highly dependent on electric components and control methods, the door lock action logic is relatively complex, prone to failure, and has low reliability.

[0004] Therefore, for the current door lock structure, further improvement needs to be made. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a door lock structure for household appliances with low requirements on electric control logic in view of the current status of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a door lock structure for household appliances with high working reliability in view of the current status of the prior art.

[0007] The third technical problem to be solved by the present invention is to provide a household appliance using the above-mentioned door lock structure in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first and second technical problems is: a door lock structure for household appliances, comprising:

[0009] The housing is used to connect with the main body of the electrical appliance, and a locking opening penetrating through the wall thickness is provided on the side wall of the housing;

[0010] A lock rod, the first end of which is connected to the door of the appliance, and the second end of which has a mouth-shaped lock hole, so that the second end of the lock rod is a columnar body located beside the mouth-shaped lock hole, and the lock rod can reciprocate along a first direction, and the lock rod can move in the positive direction of the first direction to penetrate into the housing from the lock hole and can move in the reverse direction of the first direction to penetrate out of the housing from the lock hole;

[0011] It is characterized by that it also includes

[0012] The lock buckle comprises a first locking arm, a second locking arm and a second elastic member, the first locking arm and the second locking arm are arranged opposite to each other and both extend in the first direction, and the relative wall surfaces of the first locking arm and the second locking arm are both arc-shaped surfaces arched in the direction away from each other, so that a limiting groove into which a columnar body of a locking rod can be passed is formed between the first locking arm and the second locking arm, and a spacing is formed between an end of the first locking arm facing the lock opening and an end of the second locking arm facing the lock opening to form a through hole for the columnar body to pass through the limiting groove, and the second locking arm always maintains a tendency to move closer to the first locking arm under the action of the second elastic member; when the columnar body is located in the limiting groove, the lock buckle is partially located on the path of positive movement of the columnar body along the first direction;

[0013] A mounting frame, disposed in the housing and movable along a first direction, the mounting frame being used for mounting the lock buckle thereon;

[0014] A first elastic member acts on the mounting frame to keep the mounting frame moving in the reverse direction along the first direction;

[0015] A positioning member, wherein the positioning member has a positioning portion, and when the door is locked, the positioning portion cooperates with the mounting bracket to limit the movement of the mounting bracket;

[0016] The unlocking mechanism is connected to the positioning member driving and can drive the positioning member so that the positioning portion is out of contact with the mounting frame.

[0017] In order to enable the first locking arm and the second locking arm to be close to each other to enclose the limiting groove, the first locking arm and the second locking arm are sequentially arranged along the second direction, the first locking arm has a first end facing the locking port and a second end away from the locking port, the second end of the first locking arm is connected to a mounting shaft extending along the third direction, the mounting shaft is fixedly mounted on the mounting frame, the mounting shaft is located on the positive moving path of the column along the first direction, and the first direction, the second direction and the third direction are perpendicular to each other;

[0018] The second locking arm has a third end facing the lock opening and a fourth end away from the lock opening, the fourth end of the second locking arm is provided with a sleeve, the sleeve is rotatably mounted on the mounting shaft, and the second elastic member enables the third end of the second locking arm to always maintain a tendency to approach the first end of the first locking arm. In the process of the columnar body of the locking rod passing through the through hole, the third end of the second locking arm is squeezed by the columnar body to move in a direction away from the first end of the first locking arm, so that the columnar body passes through the through hole and enters the limiting groove; after the columnar body passes through the through hole and enters the limiting groove, the third end of the second locking arm moves in a direction close to the first end of the first locking arm under the action of the second elastic member, so that the first locking arm and the second locking arm limit the columnar body in the limiting groove.

[0019] In order to facilitate the rotational installation of the second locking arm on the installation shaft, the second locking arm includes two arc-shaped arms arranged in sequence and butted along the third direction, and the shaft sleeve includes two annular rings respectively arranged beside the two arc-shaped arms, and the two annular rings are respectively located on both sides of the first locking arm. After the two arc-shaped arms are respectively installed on the installation shaft and located on both sides of the first locking arm, the two arc-shaped arms are connected, thereby realizing the installation of the first locking arm and the second locking arm.

[0020] In order to connect the two arc-shaped arms, the connecting member includes an extension arm arranged on one of the arc-shaped arms and a buckle foot formed at the free end of the extension arm. The extension arm extends along a third direction, and the other arc-shaped arm has a buckle hole for the buckle foot to buckle into.

[0021] In order to ensure the reliability of the first locking arm and the second locking arm in limiting the columnar body, the first end of the first locking arm and the third end of the second locking arm can both be located in the mouth-shaped locking hole of the locking rod, so that the limiting groove limits the columnar body of the locking rod inside. In this way, after the columnar body enters the limiting groove, the diameter of the perforation is very small, and the columnar body is not easy to escape from the limiting groove without external force.

[0022] In order to facilitate the columnar body of the lock rod to pass through the through hole of the lock buckle and enter the limiting groove, the wall surface of the columnar body of the lock rod facing away from the mouth-shaped lock hole is a first conical surface with a positive wall thickness gradually becoming thinner along the first direction, or the wall surface of the columnar body of the lock rod facing away from the mouth-shaped lock hole is a first arc surface that arches in the direction away from the first end of the lock rod. The interference force between the first conical surface or the first arc surface and the first end of the first lock arm and the third end of the second lock arm is small, so that the columnar body is easy to enter the limiting groove, and the door is closed easily.

[0023] To further facilitate closing the door, the angle between the two inclined surfaces of the first conical surface is recorded as θ1. When the column is located outside the through hole, the angle between the wall surface of the curved surface of the first locking arm adjacent to the first end and the wall surface of the curved surface of the second locking arm adjacent to the third end is recorded as θ2, θ1<θ2.

[0024] In order to prevent the columnar body of the lock rod from passing through the through hole of the lock buckle and escaping from the limiting groove, the wall surface of the columnar body of the lock rod facing the mouth-shaped lock hole is a second conical surface whose positive wall thickness gradually becomes thicker along the first direction, or the wall surface of the columnar body of the lock rod facing the mouth-shaped lock hole is a second arc surface that arches toward the first end of the lock rod. The second conical surface or the second arc surface is similar to the inclination direction of the arc surface of the first end of the first lock arm and the third end of the second lock arm, so that the columnar body is not easy to escape from the limiting groove, a larger door opening force is achieved, and the safety of the household appliance is improved.

[0025] In order to further achieve a strong door opening force, arbitrary points b and c are selected symmetrically on both sides of the highest point a of the arch of the second arc surface, and the angle between the tangent at point b and the tangent at point c is recorded as θ3. When the columnar body is located in the limiting groove, the angle between the wall surface of the arc surface of the first locking arm adjacent to the first end and the wall surface of the arc surface of the second locking arm adjacent to the third end is recorded as θ4, θ4<θ3.

[0026] In order to enable the positioning member to cooperate with the mounting frame in a limited manner, a slide groove extending along a first direction is provided on the outer wall surface of the mounting frame, and a positioning groove is provided on the mounting frame at an end of the slide groove close to the lock port;

[0027] The positioning member extends along the first direction, the positioning portion is formed at the first end of the positioning member, the positioning portion can be inserted into the positioning groove, the second end of the positioning member is rotatably mounted in the housing, and the first end of the positioning member always maintains a tendency to press against the mounting bracket under the action of the third elastic member. When the positioning portion is positioned in the positioning groove, the mounting bracket is limited and cannot move along the first direction.

[0028] In order to prevent the positioning member from being separated from the mounting bracket after being moved out of the sliding groove under the action of the third elastic member, which would make it inconvenient for the positioning member to limit the mounting bracket when the door is closed next time, a pressing surface is formed on the mounting bracket at the end of the sliding groove away from the lock port, and the mounting bracket can move relative to the positioning member until the first end of the positioning member presses against the pressing surface. The design of the pressing surface prevents the positioning member from losing contact with the mounting bracket.

[0029] In order to prevent the positioning member from interfering too much with the mounting frame when the positioning member is pressed against the pressing surface, thereby affecting the positive movement of the mounting frame along the first direction, the pressing surface is a first inclined surface that is inclined along the positive direction of the first direction toward a direction away from the positioning member.

[0030] In order to facilitate setting the lock buckle on the mounting frame and to facilitate setting the slide groove on the mounting frame, the mounting frame is box-shaped, and one side of the mounting frame facing the lock opening is open.

[0031] The unlocking mechanism can have a variety of structural forms, such as a motor and a push rod, the push rod directly pushes the positioning member to produce displacement, so that the positioning part is separated from the positioning groove. In the above scheme, the unlocking mechanism includes

[0032] Drive components;

[0033] A moving member is arranged beside the positioning member and the two are arranged in sequence in the third direction, and the moving member includes

[0034] A moving block is drivingly connected to the driving assembly so as to be able to move toward or away from the positioning member;

[0035] The moving rod has a first end connected to the moving block and a second end extending toward the positioning member. The second end of the moving rod is a second inclined surface inclined toward the positioning member along a second direction, and the second inclined surface can conflict with the wall surface of the positioning member facing the mounting frame. The driving assembly drives the moving block to move, and the moving rod moves accordingly. The second inclined surface conflicts with the positioning member and as the moving rod continues to move, the second inclined surface forces the first end of the positioning member to move in a direction away from the mounting frame, thereby causing the positioning portion of the positioning member to be out of contact with the mounting frame.

[0036] In order to guide the moving track of the moving block, the moving block is provided with a strip groove extending along its moving direction, and the housing is provided with a protrusion accommodated in the strip groove and slidably matched with the strip groove.

[0037] The driving assembly can have a variety of structural forms, such as a motor and a push rod, the push rod directly pushes the moving block, preferably, the driving assembly includes a driving member, a push rod connected to the driving member, and a transmission block connected to the push rod, the push rod extends along a first direction, the transmission block is provided with a boss, the moving block and the transmission block are arranged in sequence along a second direction, the moving block is provided with a slot in which the boss can be inserted, the slot includes a first section and a second section arranged in sequence and connected in the opposite direction of the first direction, the first section extends in the first direction, and the second section extends in the opposite direction of the first direction in a direction away from the positioning member. Because the second section is arranged obliquely, when the boss moves along the second section, it will force the moving member to move in a direction toward or away from the positioning member.

[0038] In order to improve the safety of the household appliance, a micro switch is further provided in the housing, the micro switch has a contact, and the mounting frame is provided with a convex point, and when the door is locked, the convex point triggers the contact on the micro switch. When the contact is triggered, it means that the door lock is locked and the household appliance can start working.

[0039] The technical solution adopted by the present invention to solve the above-mentioned third technical problem is: a household appliance using the above-mentioned door lock structure, characterized in that it also includes a box body and a door body, the box body is the appliance main body, the door body is the appliance door body, the box body has a cavity with one side open inside, and the door body is rotatably arranged at the open part of the box body to open and close the above-mentioned cavity.

[0040] The household appliance may be a steamer, oven, etc. In the above scheme, the household appliance is a washing machine, the top of the box is open, the first direction is the up-down direction, the positive direction of the first direction is the downward direction, the reverse direction of the first direction is the upward direction, the second direction is the front-back direction, and the third direction is the left-right direction; or the household appliance is a washing machine, the front side of the box is open, the first direction is the front-back direction, the positive direction of the first direction is the backward direction, the reverse direction of the first direction is the forward direction, the second direction is the up-down direction, and the third direction is the left-right direction. The door lock structure of the present application makes the door body have good sealing performance, improves the cleaning effect of the washing machine, and does not leak water vapor to damage the electrical components.

[0041] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention has low requirements on the electronic control logic. When it is necessary to lock the door, the columnar body of the locking rod passes through the through hole of the lock buckle and enters the limiting groove of the lock buckle, and continues to push the door body of the electrical appliance, and the mounting frame moves in the positive direction of the first direction until the positioning part of the positioning member is limited by the mounting frame; when it is necessary to unlock, the positioning part is used to release the limitation of the mounting frame by the unlocking mechanism, and then the mounting frame is moved in the opposite direction of the first direction under the action of the first elastic member, pushing the door body of the electrical appliance in a direction away from the main body of the electrical appliance by a certain angle, and then pulling the door body of the electrical appliance so that the columnar body of the locking rod is disengaged from the limiting groove of the lock buckle to open the door. The whole process is simple, reliable and easy to implement; 2. The lock buckle of the present invention includes a first locking arm and a second locking arm. The second locking arm can move toward the first locking arm under the action of the second elastic member, so that the limiting groove surrounded by the first locking arm and the second locking arm can reliably limit the columnar body of the lock hook inside, thereby ensuring the reliability of the door body locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of an embodiment of the present invention (door body open state);

[0043] Figure 2 for Figure 1 A cross-sectional view of

[0044] Figure 3 for Figure 1 A magnified image of point A;

[0045] Figure 4 for Figure 2 A magnified view of point B;

[0046] Figure 5 for Figure 3 A schematic diagram of the structure of the door body in FIG.

[0047] Figure 6 for Figure 5 A schematic diagram of the structure of the locking rod;

[0048] Figure 7 for Figure 5 A schematic diagram of the structure without the cover plate;

[0049] Figure 8 for Figure 7 A schematic diagram of the structure in another direction;

[0050] Fig. 9 for Figure 7 Enlarged view of point C;

[0051] Fig.10 for Figure 5 A schematic diagram of the structure of the mounting frame and the lock catch;

[0052] Fig.11 for Fig.10 A cross-sectional view of

[0053] Fig.12 for Fig.10 A schematic diagram of the structure of the lock in FIG.

[0054] Fig.13 for Figure 7 A schematic diagram of the structure of the unlocking mechanism;

[0055] Fig.14 for Fig.12 Schematic diagram of the decomposition of

[0056] Fig.15 for Figure 7 A schematic diagram of the structure of the positioning member in FIG.

[0057] Fig.16 for Fig.13 A schematic diagram of the structure of the moving parts in FIG.

[0058] Fig.17 It is a cross-sectional view of an embodiment of the present invention (door locked state);

[0059] Fig.18 for Fig.17 The enlarged view of point D;

[0060] Fig.19 for Fig.17 The enlarged view of point D;

[0061] Fig. 20 for Fig.17 Schematic diagram of the structure of the door lock structure without the cover plate. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below with reference to the accompanying drawings.

[0063] like Figures 1 to 20 As shown, the household appliance of this preferred embodiment includes an appliance main body, an appliance door body and a door lock structure A. The household appliance of this embodiment is a cleaning machine, the appliance main body is the box body 1 of the cleaning machine, the appliance door body is the door body 2 of the cleaning machine, the box body 1 has a chamber 11 with an open front side inside, the door body 2 can be movably arranged at the open part of the box body 1 to open and close the above-mentioned chamber 11, specifically, the lower part of the door body 2 is rotatably connected to the box body 1, and the upper part of the door body 2 can be deflected forward and backward relative to the box body 1.

[0064] It is explained here first: the first direction below is the front-to-back direction, the positive direction of the first direction is the rearward direction, the reverse direction of the first direction is the forward direction, the second direction is the up-down direction, and the third direction is the left-right direction.

[0065] like Figures 4 to 16 As shown, the door lock structure A includes a shell 3, a locking rod 4, a lock buckle 5, a mounting frame 6, a first elastic member 61, a positioning member 7 and an unlocking mechanism 8, etc. The shell 3 is installed on the electrical appliance body, and a locking hole 31 that penetrates the wall thickness is opened on the side wall of the shell 3. The shell 3 is composed of a base 3a and a cover plate 3b covered on the base 3a.

[0066] like Figure 4 , 5 As shown in Figures 6, the first end of the locking rod 4 is connected to the appliance door body 2, and the second end of the locking rod 4 has a mouth-shaped locking hole 41, so that the second end of the locking rod 4 is a columnar body 42 located next to the mouth-shaped locking hole 41, and the locking rod 4 can reciprocate along the first direction. Specifically, the locking rod 4 can move in the forward direction of the first direction to penetrate into the shell 3 from the locking hole 31, and can move in the reverse direction of the first direction to penetrate out of the shell 3 from the locking hole 31.

[0067] The mounting frame 6 is arranged in the housing 3 and can move in the first direction. The first elastic member 61 acts on the mounting frame 6 so that the mounting frame 6 always maintains a tendency to move in the opposite direction along the first direction. In this embodiment, the mounting frame 6 is in the shape of a box, and the side of the mounting frame 6 facing the lock 31 is open. The first elastic member 61 is a spring, one end of which is against the rear side wall of the mounting frame 6, and the other end is against the side wall of the housing 3. Guide blocks 62 are provided on the left and right side walls of the mounting frame 6, and a guide groove 32 extending in the front-to-back direction is provided on the housing 3. The guide block 62 slides along the guide groove 32 to guide the moving trajectory of the mounting frame 6.

[0068] like Fig.10 , 11As shown in FIGS. 12 and 14 , the lock buckle 5 is installed on the mounting frame 6. The lock buckle 5 includes a first locking arm 51, a second locking arm 52 and a second elastic member 53. The first locking arm 51 and the second locking arm 52 are sequentially arranged along the second direction, that is, the first locking arm 51 and the second locking arm 52 are arranged up and down, and the first locking arm 51 and the second locking arm 52 are arranged opposite to each other and both extend along the first direction (front and back).

[0069] The first locking arm 51 has a first end facing the lock hole 31 and a second end away from the lock hole 31. The second end of the first locking arm 51 is connected to the mounting shaft 511 extending along the third direction. The mounting shaft 511 is fixedly mounted on the mounting frame 6. The second locking arm 52 has a third end facing the lock hole 31 and a fourth end away from the lock hole 31. The fourth end of the second locking arm 52 is provided with a sleeve 521, and the sleeve 521 is rotatably mounted on the mounting shaft 511. The mounting shaft 511 is located on the positive moving path of the column 42 along the first direction, that is, the mounting shaft 511 is located on the rear side of the column 42.

[0070] The opposing walls of the first locking arm 51 and the second locking arm 52 are both arcuate surfaces 54 that arch away from each other, so that a limiting groove 55 is formed between the first locking arm 51 and the second locking arm 52, in which the columnar body 42 of the locking rod 4 can be inserted, and there is a spacing between the end of the first locking arm 51 facing the lock opening 31 and the end of the second locking arm 52 facing the lock opening 31 to form a through hole 56 for the columnar body 42 to penetrate into the limiting groove 55, and the third end of the second locking arm 52 has a tendency to move toward the first end of the first locking arm 51 under the action of the second elastic member 53. In this embodiment, the second elastic member 53 is a spring, one end of which is against the second locking arm 52, and the other end is against the inner wall surface of the mounting frame 6.

[0071] like Fig.18 As shown, when the limiting groove 55 limits the columnar body 42 of the locking rod 4 to be located inside, the first end of the first locking arm 51 and the third end of the second locking arm 52 are both located in the mouth-shaped locking hole 41 of the locking rod 4.

[0072] In the process of the columnar body 42 of the locking rod 4 passing through the through hole 56, the third end of the second locking arm 52 is squeezed by the columnar body 42 and moves in the direction away from the first end of the first locking arm 51, so that the columnar body 42 passes through the through hole 56 and enters the limiting groove 55; after the columnar body 42 passes through the through hole 56 and enters the limiting groove 55, the third end of the second locking arm 52 moves in the direction close to the first end of the first locking arm 51 under the action of the second elastic member 53, so that the first locking arm 51 and the second locking arm 52 limit the columnar body 42 in the limiting groove 55.

[0073] like Figure 4As shown, the wall surface of the columnar body 42 of the lock rod 4 facing away from the mouth-shaped lock hole 41 presents a first conical surface 421 whose positive wall thickness gradually becomes thinner along the first direction. Of course, the wall surface of the columnar body 42 of the lock rod 4 facing away from the mouth-shaped lock hole 41 can also present a first curved surface that arches in the direction away from the first end of the lock rod 4. The angle between the two inclined surfaces of the first conical surface 421 is recorded as θ1. When the columnar body 42 is located outside the through hole 56, the angle between the wall surface of the curved surface 54 of the first lock arm 51 adjacent to the first end and the wall surface of the curved surface 54 of the second lock arm 52 adjacent to the third end is recorded as θ2, θ1<θ2. The interference force between the first conical surface 421 and the first end of the first lock arm 51 and the third end of the second lock arm 52 is small, so that the columnar body 42 is easy to enter the limit groove 55, and the door is closed easily.

[0074] like Fig.19 As shown, the wall surface of the columnar body 42 of the locking rod 4 facing the mouth-shaped locking hole 41 presents a second arc surface 422 whose positive wall thickness gradually becomes thicker along the first direction. Of course, the wall surface of the columnar body 42 of the locking rod 4 facing the mouth-shaped locking hole 41 can also present a second conical surface arched toward the first end of the locking rod 4. Any points b and c are symmetrically selected on both sides of the highest point a of the arch of the second arc surface 422, and the angle between the tangent line at point b and the tangent line at point c is recorded as θ3. When the columnar body 42 is located in the limiting groove 55, the angle between the wall surface of the arc surface 54 of the first locking arm 51 adjacent to the first end and the wall surface of the arc surface 54 of the second locking arm 52 adjacent to the third end is recorded as θ4, and θ4<θ3. The second arc surface 422 is similar in inclination direction to the arc surfaces of the first end of the first locking arm 51 and the third end of the second locking arm 52, so that the columnar body 42 is not easy to escape from the limiting groove 55, achieving a larger door opening force and improving the safety of household appliances.

[0075] like Fig.11 , 12 As shown in FIGS. 14 and 15 , in this embodiment, the second locking arm 52 includes two arc-shaped arms 522 arranged in sequence and butted together along the third direction, the shaft sleeve 521 includes two annular rings 5211 respectively arranged beside the two arc-shaped arms 522, and the two annular rings 5211 are respectively located on both sides of the first locking arm 51. The connecting member 527 includes an extension arm 524 arranged on one of the arc-shaped arms 522 and a buckle foot 525 formed at the free end of the extension arm 524, the extension arm 524 extends along the third direction, and the other arc-shaped arm 522 has a buckle hole 526 for the buckle foot 525 to buckle in. After the two arc-shaped arms 522 are respectively installed on the installation shaft 511 and located on both sides of the first locking arm 51, the two arc-shaped arms 522 are connected, and the installation of the first locking arm 51 and the second locking arm 52 is realized.

[0076] like Figure 7 , 8As shown in Figures 1 and 15, a slide groove 63 extending in the first direction is provided on the outer wall surface of the mounting frame 6, and a positioning groove 64 is provided on the mounting frame 6 at the end of the slide groove 63 close to the lock port 31. The positioning member 7 extends in the first direction, and a positioning portion 71 is formed at the first end of the positioning member 7. The second end of the positioning member 7 is rotatably mounted in the pin shaft 35 of the housing 3. The middle part of the positioning member 7 is provided with a third elastic member 72, so that the first end of the positioning member 7 always maintains a tendency to press against the mounting frame 6 under the action of the third elastic member 72. In this embodiment, the third elastic member 72 is a tension spring, one end of which is connected to the mounting plate 73 in the middle of the positioning member 7, and the other end is connected to the housing 3. In the locked state, the positioning portion 71 is inserted into the positioning groove 64, thereby limiting the movement of the mounting frame 6.

[0077] A pressing surface 65 is formed on the mounting frame 6 at the end of the slide groove 63 away from the lock port 31. The mounting frame 6 can move relative to the positioning member 7 until the first end of the positioning member 7 presses against the pressing surface 65. The design of the pressing surface 65 prevents the positioning member 7 from being out of contact with the mounting frame 6. The pressing surface 65 is a first inclined surface that is inclined in the positive direction of the first direction toward a direction away from the positioning member 7. In the unlocked state, the positioning portion 71 presses against the pressing surface 65. When the door needs to be closed, the positioning portion 71 enters the slide groove 63 along the pressing surface 65. Because the pressing surface 65 is an inclined surface, there will not be much interference between the positioning portion 71 and the pressing surface 65.

[0078] like Figure 7 , 8 As shown in FIGS. 13 and 16 , the unlocking mechanism 8 is drivingly connected to the positioning member 7 , and can drive the positioning member 7 so that the positioning portion 71 is out of contact with the mounting bracket 6 . In this embodiment, the unlocking mechanism 8 includes a driving assembly and a moving member 81. The moving member 81 is arranged on the side of the positioning member 7 and the two are arranged in sequence in the third direction. The moving member 81 includes a moving block 811 and a moving rod 812. The driving assembly includes a driving member 82, a push rod 83 connected to the driving member 82, and a transmission block 84 connected to the push rod 83. The push rod 83 extends along a first direction, and the transmission block 84 is provided with a boss 841. The moving block 811 and the transmission block 84 are arranged in sequence along a second direction. The moving block 811 is provided with a slot 813 in which the boss 841 can be inserted. The slot 813 includes a first section 8131 and a second section 8132 which are arranged and connected in sequence in the opposite direction of the first direction. The first section 8131 extends in the first direction, and the second section 8132 extends in the opposite direction of the first direction toward a direction away from the positioning member 7. When the boss 841 moves along the second section 8132, the moving member 81 is forced to move in a direction toward or away from the positioning member 7.

[0079] The first end of the moving rod 812 is connected to the moving block 811, and the second end extends toward the positioning member 7. The second end of the moving rod 812 is a second inclined surface 8121 inclined along the second direction toward the positioning member 7. The second inclined surface 8121 is inclined from top to bottom toward the positioning member 7. The second inclined surface 8121 can conflict with the wall surface of the positioning member 7 toward the mounting frame 6. The second inclined surface 8121 conflicts with the positioning member 7 and as the moving rod 812 continues to move, the second inclined surface 8121 forces the first end of the positioning member 7 to move in the direction away from the mounting frame 6, thereby causing the positioning portion 71 of the positioning member 7 to disengage from the mounting frame 6.

[0080] In addition, the moving block 811 is provided with a strip groove 8111 extending along its moving direction, and the housing 3 is provided with a protrusion 33 accommodated in the strip groove 8111 and slidably matched with the strip groove 8111 to guide the movement trajectory of the moving block 811.

[0081] In this embodiment, the driving member 82 is a coil, and of course, the driving member 82 can also be a motor. The cleaning machine is provided with a door opening key, which is electrically connected to the input end of the control board, and the coil is electrically connected to the output end of the control board. After pressing the door opening key, a signal is transmitted to the control board, and the control board controls the driving member 82 to work. The connection between the coil, the control board, and the door opening key can adopt the existing technology.

[0082] A micro switch 9 is also provided in the housing 3. The micro switch 9 has a contact 91. A convex point 66 is provided on the mounting frame 6. When the door is locked, the convex point 66 triggers the contact 91 on the micro switch 9. When the contact 91 is triggered, it indicates that the door lock is locked and the household appliance can start working. In this embodiment, a spring piece 92 capable of triggering the contact 91 is provided on the micro switch 9. The convex point 66 triggers the contact 91 by squeezing the spring piece 92.

[0083] The working process of the cleaning machine of this embodiment is as follows:

[0084] In the unlocked state: the lock rod 4 is located at the front side of the housing 3, and the positioning portion 71 of the positioning member 7 presses against the pressing surface 65 of the mounting frame 6;

[0085] When the door needs to be locked, the door body 2 is rotated toward the box body 1, so that the columnar body 42 of the lock rod 4 passes through the through hole 56 of the lock buckle 5 and enters the limiting groove 55 of the lock buckle 5, and the door body 2 is continuously pushed. The columnar body 42 abuts against the mounting shaft 511 and pushes the mounting frame 6 to move in the positive direction of the first direction. During this process, the positioning portion 71 of the positioning member 7 enters the slide groove 63 from the pressing surface 65 on the mounting frame 6 until the positioning portion 71 is inserted into the positioning groove 64 on the mounting frame 6, and the protrusion 66 on the mounting frame 6 triggers the contact 91 on the micro switch 9 to achieve door locking. Fig.17 , 18 As shown;

[0086] When unlocking is required, the door opening button is pressed, the control panel controls the driving member 82 to work, the push rod 83 moves, and the transmission block 84 moves along the first direction. At this time, the boss 841 slides along the slot 813. When the boss 841 moves along the second section 8132 of the slot 813, the moving member 81 is forced to move in the direction of the positioning member 7. The second inclined surface 8121 on the moving rod 812 conflicts with the positioning member 7, and as the moving rod 812 continues to move, the second inclined surface 8121 forces the first end of the positioning member 7 to move in the direction away from the mounting bracket 6, thereby causing the positioning portion 71 of the positioning member 7 to disengage from the mounting bracket 6. Under the action of the first elastic member 61, the mounting bracket 6 moves in the opposite direction of the first direction, pushing the electrical appliance door body 2 in the direction away from the electrical appliance body by a certain angle, and then pulling the door body 2 so that the columnar body 42 of the locking rod 4 disengages from the limiting groove 55 of the lock buckle 5, thereby realizing the door opening. Figures 1 to 4 shown.

[0087] Of course, the door lock structure of this embodiment can also be used for a cleaning machine with a top door. In this case, the top of the box body 1 is open, the first direction is the up and down direction, the positive direction of the first direction is the downward direction, the reverse direction of the first direction is the upward direction, the second direction is the front and back direction, and the third direction is the left and right direction.

[0088] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A door lock structure for household appliances, comprising: A housing (3) is used to be connected to the main body of the electrical appliance, and a locking opening (31) penetrating the wall thickness is provided on the side wall of the housing (3); A lock rod (4), the first end of which is connected to the door of the appliance, and the second end of which has a mouth-shaped lock hole (41), so that the second end of the lock rod (4) is a columnar body (42) located beside the mouth-shaped lock hole (41), and the lock rod (4) can reciprocate along a first direction, the lock rod (4) can move in the positive direction of the first direction to penetrate into the housing (3) from the lock hole (31), and can move in the reverse direction of the first direction to penetrate out of the housing (3) from the lock hole (31); It is characterized in that Also includes A lock buckle (5), the lock buckle (5) comprising a first lock arm (51), a second lock arm (52) and a second elastic member (53), the first lock arm (51) and the second lock arm (52) being arranged opposite to each other and both extending in a first direction, and the opposite wall surfaces of the first lock arm (51) and the second lock arm (52) both present arc-shaped surfaces (54) arched away from each other, so that a limiting groove (55) capable of passing a columnar body (42) of a lock rod (4) is formed between the first lock arm (51) and the second lock arm (52) , and a spacing is provided between the end of the first locking arm (51) facing the locking opening (31) and the end of the second locking arm (52) facing the locking opening (31) to form a through hole (56) for the column (42) to penetrate into the limiting groove (55), and the second locking arm (52) always maintains a tendency to move toward the first locking arm (51) under the action of the second elastic member (53); when the column (42) is located in the limiting groove (55), the lock buckle (5) is partially located on the path of the column (42) moving in the positive direction along the first direction; A mounting frame (6) is disposed in the housing (3) and is movable along a first direction, and the lock buckle (5) is mounted on the mounting frame (6); A first elastic member (61) acts on the mounting frame (6) to ensure that the mounting frame (6) always maintains a tendency to move in the opposite direction along the first direction; A positioning member (7), the positioning member (7) having a positioning portion (71), and in a door locked state, the positioning portion (71) is limitedly matched with the mounting frame (6) to restrict movement of the mounting frame (6); An unlocking mechanism (8) is drivingly connected to the positioning member (7) and is capable of driving the positioning member (7) so as to disengage the positioning portion (71) from contact with the mounting frame (6); The first locking arm (51) and the second locking arm (52) are arranged in sequence along the second direction, the first locking arm (51) has a first end facing the locking port (31) and a second end away from the locking port (31), the second end of the first locking arm (51) is connected to a mounting shaft (511) extending along the third direction, the mounting shaft (511) is fixedly mounted on the mounting frame (6), the mounting shaft (511) is located on the positive moving path of the columnar body (42) along the first direction, and the first direction, the second direction and the third direction are perpendicular to each other; The second locking arm (52) has a third end facing the locking opening (31) and a fourth end away from the locking opening (31); the fourth end of the second locking arm (52) is provided with a shaft sleeve (521); the shaft sleeve (521) is rotatably mounted on the mounting shaft (511); the second elastic member (53) enables the third end of the second locking arm (52) to always maintain a tendency to approach the first end of the first locking arm (51); A slide groove (63) extending along a first direction is provided on the outer wall surface of the mounting frame (6), and a positioning groove (64) is provided on the mounting frame (6) at an end of the slide groove (63) close to the lock opening (31); The positioning member (7) extends along a first direction, the first end of the positioning member (7) is formed with the positioning portion (71), the positioning portion (71) can be inserted into the positioning groove (64), the second end of the positioning member (7) is rotatably mounted in the housing (3), and the first end of the positioning member (7) always maintains a tendency to press against the mounting frame (6) under the action of the third elastic member (72); The mounting frame (6) is formed with a pressing surface (65) at the end of the slide groove (63) away from the locking opening (31), and the mounting frame (6) can move relative to the positioning member (7) until the first end of the positioning member (7) presses against the pressing surface (65).

2. The door lock structure according to claim 1, characterized in that: The second locking arm (52) comprises two arc-shaped arms (522) arranged in sequence and butted against each other along a third direction, and the shaft sleeve (521) comprises two annular rings (5211) respectively arranged beside the two arc-shaped arms (522), and the two annular rings (5211) are respectively located on both sides of the first locking arm (51).

3. The door lock structure according to claim 2, characterized in that: The connecting piece comprises an extension arm (524) arranged on one of the arc-shaped arms (522) and a buckle foot (525) formed at the free end of the extension arm (524); the extension arm (524) extends along a third direction; and the other arc-shaped arm (522) has a buckle hole (526) for the buckle foot (525) to buckle into.

4. The door lock structure according to claim 1, characterized in that: The first end of the first locking arm (51) and the third end of the second locking arm (52) can both be located in the mouth-shaped locking hole (41) of the locking rod (4), so that the limiting groove (55) limits the columnar body (42) of the locking rod (4) inside.

5. The door lock structure according to claim 4, characterized in that: The wall surface of the columnar body (42) of the locking rod (4) facing away from the mouth-shaped locking hole (41) is a first conical surface (421) whose positive wall thickness gradually becomes thinner along the first direction, or the wall surface of the columnar body (42) of the locking rod (4) facing away from the mouth-shaped locking hole (41) is a first curved surface that arches in a direction away from the first end of the locking rod (4).

6. The door lock structure according to claim 5, characterized in that: The angle between the two inclined surfaces of the first conical surface (421) is recorded as θ1. When the columnar body (42) is located outside the through hole (56), the angle between the wall surface of the arcuate surface (54) of the first locking arm (51) adjacent to the first end and the wall surface of the arcuate surface (54) of the second locking arm (52) adjacent to the third end is recorded as θ2, θ1<θ2.

7. The door lock structure according to claim 4, characterized in that: The wall surface of the columnar body (42) of the locking rod (4) facing the mouth-shaped locking hole (41) is a second conical surface whose positive wall thickness gradually becomes thicker along the first direction, or the wall surface of the columnar body (42) of the locking rod (4) facing the mouth-shaped locking hole (41) is a second curved surface (422) that arches toward the first end of the locking rod (4).

8. The door lock structure according to claim 7, characterized in that: Select any points b and c symmetrically on both sides of the highest point (a) of the arch of the second arc surface (422), and the angle between the tangent at point b and the tangent at point c is recorded as θ3. When the columnar body (42) is located in the limiting groove (55), the angle between the wall surface of the arc surface (54) of the first locking arm (51) adjacent to the first end and the wall surface of the arc surface (54) of the second locking arm (52) adjacent to the third end is recorded as θ4, and θ4<θ3.

9. The door lock structure according to claim 1, characterized in that: The pressing surface (65) is a first inclined surface that is inclined in a direction away from the positioning member (7) along the positive direction of the first direction.

10. The door lock structure according to claim 1, characterized in that: The mounting frame (6) is box-shaped, and one side of the mounting frame (6) facing the lock opening (31) is open.

11. The door lock structure according to any one of claims 1 to 8, characterized in that: The unlocking mechanism (8) comprises Drive components; The moving member (81) is arranged beside the positioning member (7) and the two are arranged in sequence in the third direction. The moving member (81) includes A moving block (811) is drivingly connected to the driving assembly so as to be able to move toward or away from the positioning member (7); A moving rod (812) has a first end connected to the moving block (811) and a second end extending toward the positioning member (7); the second end of the moving rod (812) is a second inclined surface (8121) inclined along a second direction toward the positioning member (7); and the second inclined surface (8121) can abut against a wall surface of the positioning member (7) facing the mounting frame (6).

12. The door lock structure according to claim 11, characterized in that: The moving block (811) is provided with a strip groove (8111) extending along its moving direction, and the housing (3) is provided with a protrusion (33) accommodated in the strip groove (8111) and slidably matched with the strip groove (8111).

13. The door lock structure according to claim 12, characterized in that: The driving assembly comprises a driving member (82), a push rod (83) drivingly connected to the driving member (82), and a transmission block (84) connected to the push rod (83); the push rod (83) extends along a first direction; the transmission block (84) is provided with a boss (841); the moving block (811) and the transmission block (84) are arranged in sequence along a second direction; the moving block (811) is provided with a slot (813) into which the boss (841) can be inserted; the slot (813) comprises a first section (8131) and a second section (8132) which are arranged in sequence and connected in the opposite direction of the first direction; the first section (8131) extends in the first direction; and the second section (8132) extends in the opposite direction of the first direction in a direction away from the positioning member (7).

14. The door lock structure according to any one of claims 1 to 8, characterized in that: A micro switch (9) is also provided in the housing (3), the micro switch (9) having a contact (91), and a convex point (66) is provided on the mounting frame (6). When the door is locked, the convex point (66) triggers the contact (91) on the micro switch (9).

15. A household appliance using the door lock structure according to any one of claims 1 to 14, characterized in that: The device also comprises a housing (1) and a door (2), wherein the housing (1) is the main body of the electrical appliance, and the door (2) is the door of the electrical appliance. The housing (1) has a chamber (11) with one side open, and the door (2) is rotatably arranged at the open portion of the housing (1) so as to open and close the chamber (11).

16. The household appliance according to claim 15, characterized in that: The household appliance is a cleaning machine, the top of the housing (1) is open, the first direction is an up-down direction, the positive direction of the first direction is a downward direction, the reverse direction of the first direction is an upward direction, the second direction is a front-to-back direction, and the third direction is a left-to-right direction; or the household appliance is a cleaning machine, the front side of the housing (1) is open, the first direction is a front-to-back direction, the positive direction of the first direction is a backward direction, the reverse direction of the first direction is a forward direction, the second direction is an up-to-down direction, and the third direction is a left-to-right direction.

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