Door adjusting mechanism and dish washing machine

Abstract

The application belongs to the technical field of dish-washing machines, and particularly discloses a door body adjusting mechanism and a dish-washing machine. The door body adjusting mechanism comprises a base, a tension spring horizontally arranged on the base and connected with the base at one end, a pull rope connected with the other end of the tension spring, a connecting block provided with a pulley part, a hinge arranged on a door body, the other end of the pull rope being connected with the hinge through the pulley part, a hinge mounting plate, the hinge being rotatably connected with the hinge mounting plate, one of the hinge mounting plate and the connecting block being provided with a connecting boss, the other of the hinge mounting plate and the connecting block being provided with a connecting hole, and the connecting boss and the connecting hole being clamped. The door body adjusting mechanism and the dish-washing machine can improve the installation convenience and assembly efficiency of the pulley and the dish-washing machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dishwashers, in particular to a door adjusting mechanism and a dishwasher. BACKGROUND

[0002] A dishwasher is an automatic device for cleaning dishes, chopsticks, plates, bowls and other tableware. With the improvement of people's living standards, dishwashers are increasingly used in families. They can reduce the labor intensity of users, improve work efficiency, improve cleanliness, and meet the experience of users' comfortable life.

[0003] A dishwasher usually has a door adjusting mechanism to realize the opening and closing of the door and the hovering of the door at a specific position. The prior art provides a door balance adjusting mechanism, which includes a dishwasher base, a tension spring arranged in the dishwasher base, a pull rope and an adjusting wheel set. The front end of the tension spring is hung on the pull rope, the dishwasher base is provided with a hinge pulley and a hinge for opening and closing the dishwasher door, and the pull rope is hung on the hinge after passing through the adjusting pulley assembly and the hinge pulley.

[0004] The hinge pulley of the door balance adjusting mechanism is used to control the direction of the pull rope, and it is usually fixed on the dishwasher base by screws. This fixing method has the problem that the screws are easy to damage or lose, causing the pulley to fall off. At the same time, the installation method of screwing the screws has low assembly efficiency. SUMMARY

[0005] One object of the present application is to provide a door adjusting mechanism to improve the assembly convenience and efficiency of the pulley and hinge mounting plate in the door adjusting mechanism.

[0006] Another object of the present application is to provide a dishwasher to improve the assembly efficiency and convenience of the dishwasher.

[0007] To achieve the above objects, the present application adopts the following technical solutions:

[0008] a base;

[0009] a tension spring arranged horizontally on the base, one end of the tension spring being connected to the base;

[0010] a pull rope, one end of the pull rope being connected to the other end of the tension spring;

[0011] a connecting block, the connecting block being provided with a pulley portion,

[0012] a hinge arranged on the door, the other end of the pull rope being connected to the hinge through the pulley portion;

[0013] A hinge mounting plate, the hinge is rotatably connected to the hinge mounting plate, one of the hinge mounting plate and the connecting block is provided with a connecting boss, the other of the hinge mounting plate and the connecting block is provided with a connecting hole, and the connecting boss is snap-fitted to the connecting hole.

[0014] As an optimal technical solution for a door body adjustment mechanism, the connecting boss includes a connecting portion and a limiting portion arranged along the axial direction of the pulley portion, and the limiting portion is connected to an end of the connecting portion away from the pulley portion; the connecting hole includes a perforated portion for allowing the limiting portion to pass through and a limiting hole portion for limiting the passing of the limiting portion, and the connecting portion can slide from the perforated portion to the limiting hole portion.

[0015] As an optimal technical solution for a door adjustment mechanism, the connecting hole is a gourd hole, the large hole of the gourd hole is the perforated portion, the small hole of the gourd hole is the limiting hole portion, and the connecting portion and the limiting portion are both cylindrical.

[0016] As an optimal technical solution for a door body adjustment mechanism, the center line connecting the perforated portion and the limiting hole portion is horizontally arranged, and when the connecting hole is located on the hinge mounting plate, the limiting hole portion is located on the side of the perforated portion facing the door body, and when the connecting hole is located on the connecting block, the limiting hole portion is located on the side of the perforated portion away from the door body.

[0017] As an optimal technical solution for a door adjustment mechanism, a rotation-stopping structure for limiting the rotation of the connecting block is provided on the base.

[0018] As a preferred technical solution of the door adjustment mechanism, a longitudinal mounting groove is provided on the base, and the hinge mounting plate and the connecting block are both arranged in the longitudinal mounting groove;

[0019] The connecting block is provided with limiting protrusions on both sides along the width direction of the longitudinal mounting groove. The limiting protrusion close to the door body contacts the groove wall surface of the longitudinal mounting groove, and the lower side of the other limiting protrusion abuts against the upper end surface of the base.

[0020] As an optimal technical solution for a door body adjustment mechanism, a plug-in groove is provided on the groove wall on the side of the longitudinal mounting groove close to the door body, and a plug-in protrusion is provided on the corresponding limiting protrusion on the connecting block in the direction toward the door body, and the plug-in protrusion is inserted in the plug-in groove.

[0021] As an optimal technical solution for a door adjustment mechanism, the connecting block is provided with a limiting structure for preventing the pull rope from being separated from the pulley portion.

[0022] As a preferred technical solution for a door body adjustment mechanism, the limiting structure includes protrusions relatively arranged on both sides of the pulley part axially, one end of the protrusion is connected to the corresponding end face of the pulley part, and the other end extends in the direction toward the other protrusion, and the distance between the two protrusions is smaller than the diameter of the pull rope.

[0023] A dishwasher comprises the door adjustment mechanism described above.

[0024] The beneficial effects of the present invention are:

[0025] The door adjustment mechanism provided by the present invention can achieve the connection between the connecting block and the hinge mounting plate by setting a connecting boss and a connecting hole, thereby improving the assembly efficiency between the hinge mounting plate and the connecting block. Since the pulley part is integrated on the connecting hole, the assembly and disassembly between the hinge mounting plate and the connecting block are convenient, and the setting of the conventional pulley connecting the hinge mounting plate with screws can be avoided, thereby reducing the number of screw connectors in the door adjustment mechanism and reducing the risk of screws falling into the dishwasher.

[0026] The dishwasher provided by the present invention can improve the assembly efficiency and convenience of the dishwasher by adopting the above-mentioned door adjustment mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a dishwasher provided by an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0029] Figure 3 is a schematic structural diagram of an insert provided by an embodiment of the present invention;

[0030] Figure 4 yes Figure 1 A partial enlarged view of point B in the middle;

[0031] Figure 5 This is a schematic structural diagram of the lower pulley in one direction provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic structural diagram of the lower pulley provided by an embodiment of the present invention in another direction;

[0033] Figure 7 yes Figure 1 A partial enlarged view of point C in the middle;

[0034] Figure 8 This is a partial structural exploded view of the door adjustment mechanism provided by an embodiment of the present invention;

[0035] Figure 9This is a schematic diagram of the structure of a connection block in one direction provided by an embodiment of the present invention;

[0036] Figure 10 is a schematic structural diagram of a connection block provided by an embodiment of the present invention in another direction;

[0037] Figure 11 This is a schematic diagram of the structure of a hook provided in one direction according to an embodiment of the present invention;

[0038] Figure 12 It is a schematic structural diagram of the hook provided by an embodiment of the present invention in another direction.

[0039] The following are marked in the figure:

[0040] 10-Door adjustment mechanism; 20-Inner liner; 30-Shell; 40-Door; 50-Post; 60-Lock mechanism;

[0041] 1-Connecting block; 2-Base; 3-Tension spring; 4-Pull rope; 5-Hinge mounting plate; 6-Hinge; 7-Hook; 8-Insert; 9-Pulley assembly;

[0042] 11- pulley portion; 111- guide arc surface; 112- guide slot; 12- connecting boss; 121- connecting portion; 122- limiting portion; 13- limiting protrusion; 14- plug-in protrusion; 15- connecting plate portion; 16- extending arm portion; 161- clamping protrusion; 17- fixing hole;

[0043] 21- horizontal mounting slot; 211- slot; 22- longitudinal mounting slot; 221- plugging slot; 23- receiving slot; 24- limiting slide slot; 241- through slot portion; 242- slide slot portion; 25- guide slot; 26- limiting card slot;

[0044] 41-connecting piece; 411-cylinder; 412-anti-slip portion; 42-stop block;

[0045] 51-connecting hole; 511-perforated portion; 512-limiting hole portion; 52-hinge axis; 53-threaded connecting hole;

[0046] 61-shaft slot; 62-hook portion; 621-hook slot;

[0047] 71-hanging plate; 711-viewport; 72-hook shaft; 73-anti-drop protrusion; 74-fixing portion; 741-rope through hole;

[0048] 81-main body; 811-first side; 812-second side; 813-third side; 82-protruding portion; 83-engaging notch; 84-convex hull; 85-avoidance opening; 86-avoidance bayonet;

[0049] 91-lower pulley; 911-pulley guide surface; 912-adjustment through hole; 913-mounting hole; 914-guide protrusion; 915-guide slider; 916-limiting block; 92-tension adjustment assembly; 921-adjustment screw; 922-adjustment support. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0051] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0052] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0053] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0054] Figure 1 A structural diagram of a dishwasher provided in an embodiment of the present invention is shown in FIG. Figure 1As shown, this embodiment provides a dishwasher, comprising a shell 30 and an inner pot 20 arranged inside the shell 30, the shell 30 having a front opening, through which the bowl basket can be pulled out and arranged inside the inner pot 20. The shell 30 is hinged with a door body 40 at the lower end of the front opening to close or open the opening of the shell 30, so as to prevent the dishwasher from splashing water during the process of rinsing dishes and causing pollution to the external environment of the dishwasher. A door body adjustment mechanism 10 is provided between the door body 40 and the shell 30, for realizing the rotation opening and closing of the door body 40 relative to the shell 30 and the hovering of the door body 40 after being rotated to a preset angle. A locking mechanism 60 is also provided at the upper end of the shell 30 and the door body 40, for locking the door body 40 with the shell 30 after the door body 40 closes the opening of the shell 30.

[0055] In this embodiment, the inner liner 20 is formed by the U-shaped inner liner side panels, top panel, and bottom panel. A U-shaped column 50 is provided at the front end of the inner liner 20. The two vertical sides of the column 50 are located on opposite sides of the inner liner side panels and connected to the inner liner side panels. The lower ends of the vertical sides extend to the outside of the bottom panel and are connected to the bottom panel. The horizontal side of the column 50 is located at the upper end of the bottom panel and is connected to the top panel. The provision of the U-shaped column 50 connects the side panels, top panel, and bottom panel of the inner liner 20 into a single body, thereby improving the structural stability of the inner liner 20.

[0056] Door adjustment mechanism 10 comprises a base 2, a tension spring 3, a pull cord 4, a pulley assembly 9, an upper pulley, a hinge mounting plate 5, and a hinge 6. Base 2 is located at the bottom of the dishwasher and houses a water tank, water pump, and water supply components. Tension spring 3 is horizontally positioned at the bottom of base 2. One end of pull cord 4 is connected to tension spring 3, and the other end passes through pulley assembly 9 and the upper pulley before connecting to hinge 6. Hinge 6 is securely attached to door 40. When the door body 40 is in the process of opening, the rotation of the door body 40 drives the hinge 6 to rotate, thereby pulling the pull rope 4 and the tension spring 3, causing the tension spring 3 to stretch. When the door body 40 rotates to a certain angle, the elastic restoring force of the tension spring 3 is balanced with the gravity of the door body 40, and the door body 40 hovers; when the door body 40 is in the process of closing, it pushes the door body 40 to rotate relative to the shell 30, causing the hinge 6 to rotate, and the pull rope 4 moves toward the direction close to the tension spring 3 under the action of external force and the elastic restoring force of the tension spring 3, and the tension spring 3 recovers under the action of the elastic restoring force, and when the door body 40 closes the opening of the shell 30, the tension spring 3 returns to its original length.

[0057] Specifically, Figure 2 for Figure 1 A partial enlarged view of point A in the middle, such as Figure 2As shown, in the embodiment, the base 2 is provided with a horizontal transverse installation groove 21 on each of the left and right sides, the tension spring 3 is horizontally arranged in the transverse installation groove 21, and one end of the tension spring 3 is connected with the base 2 and the other end is connected with one end of the pull rope 4. In the embodiment, preferably, the groove wall of the transverse installation groove 21 is provided with an insertion groove 211, and the insertion groove 211 is provided with an insertion piece 8, which is inserted between two adjacent spring coils of the tension spring 3. The arrangement is beneficial to improve the assembly and disassembly convenience of the tension spring 3 and the base 2, is beneficial to the installation of the tension spring 3 on the base 2, and can prevent the tension spring 3 from being separated from the transverse installation groove 21, thereby improving the installation stability of the tension spring 3. More preferably, the transverse installation groove 21 is provided with a plurality of insertion grooves 211 along the length direction, and the insertion piece 8 is selectively inserted into one of the insertion grooves 211, so as to adjust the insertion position of the insertion piece 8 on the tension spring 3, thereby adjusting the extension and contraction characteristics of the tension spring 3. In other embodiments, the tension spring 3 can be connected with the base 2 through the hook 7 arranged at the end of the tension spring 3.

[0058] In the embodiment, preferably, the cross section of the transverse installation groove 21 is rectangular, and the arrangement is simple and convenient. The insertion groove 211 is a U-shaped groove arranged on the inner wall of the transverse installation groove 21. In other embodiments, the cross section of the transverse installation groove 21 can be circular, and the shape of the insertion groove 211 is matched with the cross section shape of the transverse installation groove 21.

[0059] Figure 3 The structure schematic view of the insertion piece 8 provided in the embodiment is shown in Figure 3 As shown, the insertion piece 8 provided in the embodiment includes a plate-shaped body part 81 and a clamping protrusion 82 protruding in the middle of the body part 81. When the insertion piece 8 is inserted between two adjacent spring coils of the tension spring 3, the clamping protrusion 82 is located inside the opposite spring coil, and abuts against the spring coil, so as to improve the connection stability of the insertion piece 8 and the tension spring 3, and prevent the insertion piece 8 from being relatively separated from the tension spring 3. More preferably, a clamping gap 83 is formed between the clamping protrusion 82 and the body part 81, and when the insertion piece 8 is inserted between two adjacent spring coils of the tension spring 3, the spring coil opposite to the clamping protrusion 82 is partially inserted into the clamping gap 83 and abuts against the side of the clamping protrusion 82, so as to further improve the stability of the insertion piece 8 inserted into the tension spring 3, and effectively prevent the tension spring 3 from being relatively separated from the insertion piece 8.

[0060] In the embodiment, the body part 81 is a whole rectangular structure, which includes two oppositely arranged first side edges 811, and a second side edge 812 and a third side edge 813 respectively arranged between the two first side edges 811, and the two first side edges 811 are respectively outwardly protruded with a bulge 84. Preferably, the bulge 84 is an arc structure with an opening facing the body part 81. When the insertion piece 8 is inserted into the insertion groove 211, the two bulges 84 respectively abut against the upper and lower groove walls of the insertion groove 211 and can slide relative to the corresponding groove wall. The arrangement of the bulge 84 is beneficial to reduce the resistance of the insertion piece 8 inserted into the insertion groove 211, and improve the insertion convenience.

[0061] More preferably, the corners of the two first side edges 811 and the second side edge 812 are provided with chamfers, which are beneficial for guiding the insertion of the tab 8 into the slot 211. In addition, since the two adjacent spring coils of the tension spring 3 are connected in a spiral manner, in order to facilitate the insertion of the tab 8 between the two adjacent spring coils, the third side edge 813 is provided with a relief opening 85. When the tab 8 is inserted into the tension spring 3, the connecting portion of the two adjacent spring coils is arranged on both sides of the body portion 81 through the relief opening 85. More preferably, the relief opening 85 is provided with a relief notch 86 on the side wall close to the two first side edges 811. The relief notch 86 is an arc-shaped structure matching the diameter of the spring wire of the tension spring 3. When the tab 8 is inserted into the tension spring 3, the connecting portion of the two adjacent spring coils is clamped in the relief notch 86, which further prevents the tab 8 from being separated from the tension spring 3.

[0062] In the present embodiment, the end of the tension spring 3 away from the tab 8 is connected with the pull rope 4. Specifically, in the present embodiment, the end of the pull rope 4 connected with the tension spring 3 is provided with a connecting piece 41 having a hollow cylindrical barrel portion 411 and a anti-disengagement portion 412 protruding from the outer wall of the barrel portion 411. The end of the pull rope 4 is inserted into the barrel portion 411 and fixedly connected with the barrel portion 411. The connecting piece 41 extends into the tension spring 3, and one of the spring coils of the tension spring 3 abuts against the axially front side of the anti-disengagement portion 412, preventing the tension spring 3 from being disengaged from the connecting piece 41. More preferably, the diameter of the spring coil of the tension spring 3 connected with the end of the pull rope 4 gradually decreases, so as to reduce the size of the connecting piece 41 and improve the tightness of the connection between the connecting piece 41 and the tension spring 3. Further, a plurality of anti-disengagement portions 412 are arranged along the axial direction of the barrel portion 411, which improves the tightness of the connection between the connecting piece 41 and the tension spring 3. In the present embodiment, the anti-disengagement portions 412 are symmetrically arranged in two, and in other embodiments, the anti-disengagement portions 412 can be arranged in three or more.

[0063] In order to ensure that the tension spring 3 extends and retracts in the horizontal direction and avoid the tension spring 3 from swinging during the opening and closing of the door of the dishwasher, in the present embodiment, the base 2 is provided with a pulley assembly 9. The end of the pull rope 4 away from the tension spring 3 is connected with the hinge 6 after passing through the pulley assembly 9, so that the portion of the pull rope 4 between the tension spring 3 and the pulley assembly 9 is arranged horizontally. Specifically, in the present embodiment, the base 2 is provided with a receiving groove 23, and the pulley assembly 9 is arranged in the receiving groove 23.

[0064] Figure 4 In order to Figure 1 The local enlarged view at B is shown in FIG. 8B. Figure 4As shown, the pulley assembly 9 includes a lower pulley 91 and a tension adjustment assembly 92. The lower pulley 91 provides guidance for the direction of the pull rope 4. The tension adjustment assembly 92 can adjust the horizontal position of the lower pulley 91 on the base, thereby adjusting the tension of the pull rope 4. The tension adjustment assembly 92 includes an adjustment screw 921 and an adjustment thread structure disposed on the lower pulley 91 and threadedly engaged with the adjustment screw 921. The adjustment screw 921 is disposed horizontally and penetrates the lower pulley 91 and is threadedly engaged with the adjustment thread structure. By rotating the adjustment screw 921, the lower pulley 91 is driven to move horizontally within the accommodating groove 23, thereby adjusting the length of the portion of the pull rope 4 between the lower pulley 91 and the tension spring 3, thereby adjusting the tension of the pull rope 4.

[0065] In this embodiment, Figure 5 This is a schematic diagram of the structure of the lower pulley in one direction provided by an embodiment of the present invention. Figure 6 A schematic diagram of the structure of the lower pulley provided in another direction according to an embodiment of the present invention is shown in FIG. Figure 4-6 As shown, the lower pulley 91 is generally rectangular. A pulley guide surface 911 is provided on the end of the lower pulley 91 facing away from the bottom of the receiving groove 23, around which the pull rope 4 is wound. An adjustment hole 912 is horizontally defined on the end of the lower pulley 91 facing the bottom of the receiving groove 23, through which an adjustment screw 921 is inserted.

[0066] In this embodiment, the lower pulley 91 is preferably injection molded. To avoid problems such as low thread precision and easy wear caused by the threading of the injection molded structure, in this embodiment, an adjustment support 922 is preferably provided on the lower pulley 91. The adjustment support 922 is provided with an internal threaded hole connected to the adjustment through hole 912, and the internal threaded hole forms the above-mentioned adjustment thread structure. In this embodiment, the adjustment support 922 is made of metal. Therefore, providing the adjustment thread structure on the adjustment support 922 can ensure the accuracy of the adjustment thread structure and avoid problems such as debonding and wear of the adjustment thread structure, thereby improving the adjustment accuracy of the tension adjustment assembly 92 and increasing the service life of the tension adjustment assembly 92.

[0067] In this embodiment, to improve the connection stability between the lower pulley 91 and the adjustment support 922, preferably, the lower pulley 91 has a mounting hole 913 perpendicular to the adjustment through hole 912 at the center of the circle corresponding to the pulley guide curved surface 111. The adjustment support 922 is disposed within the mounting hole 913, and the lower pulley 91 and the adjustment support 922 are integrally formed by injection molding. Specifically, in other embodiments, the adjustment support 922 can also be connected to the adjustment support 922 by riveting.

[0068] In this embodiment, to prevent axial displacement of the adjusting screw 921 during rotation, one end of the adjusting screw 921 passes through the base 2, and two stop structures are spaced apart along the adjusting screw 921's axis. These stop structures abut the inner and outer walls of the base 2, respectively, to limit the horizontal movement of the adjusting screw 921 relative to the base 2. Specifically, in this embodiment, a nut is provided at one end of the adjusting screw 921, and a retaining ring is provided near the nut. A gourd-shaped through-hole is provided on the front sidewall of the base 2, corresponding to the position of the screw. The through-hole comprises a first and second interconnected hole portions. The diameter of the first hole portion is larger than the diameter of the retaining ring of the screw, while the diameter of the second hole portion is smaller than the diameter of the nut portion. This allows the adjusting screw 921 and the retaining ring to pass from the first hole portion into the interior of the base 2 and then into the second hole portion, where the nut and retaining ring abut the inner and outer walls of the base 2 where the second hole portion is located, respectively, limiting the axial movement of the adjusting screw 921. In this arrangement, both the nut and retaining ring serve as stop structures.

[0069] In this embodiment, to prevent the lower pulley 91 from rotating, the receiving groove 23 is preferably a rectangular groove adapted to fit the slider, with the upper and lower sides of the lower pulley 91 respectively abutting against the upper and lower groove walls of the receiving groove 23. More preferably, a guide groove 25 is horizontally defined on one side of the groove wall of the receiving groove 23, and a guide protrusion 914 is provided outwardly from the corresponding side of the lower pulley 91. The guide protrusion 914 is slidably connected to the guide groove 25, further guiding the horizontal movement of the lower pulley 91. In this embodiment, one guide protrusion 914 is provided at each end of the lower pulley 91 in the horizontal direction. In other embodiments, only one guide protrusion 914 may be provided, or multiple guide protrusions 914 may be provided at intervals along the horizontal direction.

[0070] In this embodiment, a horizontally defined limiting groove 24 is further defined at the bottom of the receiving groove 23. A receiving cavity is also defined within the base 2, communicating with the limiting groove 24. The receiving cavity and the receiving groove 23 are located on either side of the limiting groove 24. The limiting groove 24 includes a horizontally arranged rectangular groove portion 242 and a circular through-groove portion 241 located at the end of the groove portion 242 away from the nut. The diameter of the through-groove portion 241 is greater than the width of the groove portion 242, and the width of the receiving cavity is greater than the diameter of the through-groove portion 241. A rectangular guide slider 915 and a circular limiting block 916 are sequentially provided on the side of the lower pulley 91 facing the bottom of the receiving groove 23. The shape of the guide slider 915 matches that of the groove portion 242, and the shape of the limiting block 916 matches that of the through-groove portion 241. When the lower pulley 91 is installed, the stopper 916 extends through the through-groove 241 into the accommodating cavity, and the guide slider 915 is slidably connected to the groove wall of the slide groove 242. With this arrangement, when the lower pulley 91 moves horizontally out of its initial installation position, the stopper 916 cannot disengage from the guide groove 25, preventing the lower pulley 91 from disengaging from the accommodating groove 23 due to vibration or other reasons, thereby ensuring the installation reliability and position stability of the lower pulley 91.

[0071] In this embodiment, in order to guide the pull rope 4 between the lower pulley 91 and the hinge 6, an upper pulley is further provided between the lower pulley 91 and the hinge 6. Figure 7 for Figure 1 A partial enlarged view of point C in the middle. Figure 8 This is a schematic diagram of the disassembled structure of the door adjustment mechanism provided by an embodiment of the present invention. Figure 9 A schematic diagram of the structure of a connection block in one direction provided by an embodiment of the present invention, Figure 10 A schematic diagram of the structure of the connection block provided in another direction according to an embodiment of the present invention is shown in FIG. Figure 7-10 As shown, in this embodiment, the upper pulley is mounted on the hinge mounting plate 5. The hinge mounting plate 5 includes a hinge connection portion and upper and lower connecting arms located above and below the hinge connection portion 121. The hinge connection portion 121 and the upper connecting arm are connected to the column 50, while the lower connecting arm is connected to the base 2. Preferably, the hinge mounting plate 5 is connected to the column 50 and the base 2 using threaded connectors, which provides high connection stability. In other embodiments, the hinge mounting plate 5, the column 50, and the base 2 may also be connected using a detachable connection method such as a snap-on connection.

[0072] In this embodiment, a longitudinal mounting slot 22 is vertically defined on the sidewall of the base 2 and communicates with the accommodating slot 23. The lower connecting arm extends into the longitudinal mounting slot 22 and connects to the bottom of the slot. A lower pulley 91 is positioned within the longitudinal mounting slot 22 and connected to the hinge mounting plate 5. To facilitate the connection between the lower pulley 91 and the hinge mounting plate 5, in this embodiment, the upper pulley is integrated into the connecting block 1. The connecting block 1 is provided with a pulley portion 11, which serves as the upper pulley. Both axial surfaces of the pulley portion 11 are flat, and the sidewalls of the pulley portion 11 are provided with guide grooves 112 for guiding the pull cord 4.

[0073] A first connecting structure is provided on the hinge mounting plate 5, and a second connecting structure is provided on the connecting block 1. The second connecting structure and the first connecting structure are engaged with each other. By engaging the first and second connecting structures, an engaging connection between the connecting block 1 and the hinge mounting plate 5 can be achieved, thereby improving the assembly efficiency between the hinge mounting plate 5 and the connecting block 1 and facilitating assembly and disassembly of the hinge mounting plate 5 and the connecting block 1. This also avoids the conventional arrangement of the upper pulley connecting the hinge mounting plate 5 with screws, reduces the number of screw connectors 41 in the door adjustment mechanism 10, and reduces the risk of screws falling into the dishwasher.

[0074] In this embodiment, in order to improve the connection convenience between the hinge mounting plate 5 and the connecting block 1, preferably, the second connecting structure includes a connecting boss 12 vertically protruding from the end face of the pulley portion 11, and the connecting boss 12 includes a connecting portion 121 and a limiting portion 122 arranged in sequence along the direction away from the pulley portion 11, and the first connecting structure includes a connecting hole 51, and the connecting hole 51 includes a perforated portion 511 for the limiting portion 122 and the connecting portion 121 to pass through, and a limiting hole portion 512 for the connecting portion 121 to pass through and to limit the passing of the limiting portion 122, and the perforated portion 511 is connected to the limiting hole portion 512, and the connecting portion 121 can enter the limiting hole portion 512 through the perforated portion 511. When the hinge mounting plate 5 is connected to the connecting block 1, the limiting portion 122 passes through the perforated portion 511 from one side of the hinge mounting plate 5 into the other side of the hinge mounting plate 5, and then the connecting portion 121 slides from the perforated portion 511 into the limiting hole portion 512. Since the limiting hole portion 512 restricts the limiting portion 122 from passing out, it can prevent the connecting boss 12 from escaping from the first connecting structure, thereby improving the connection stability between the hinge mounting plate 5 and the connecting block 1.

[0075] In this embodiment, the connection hole 51 is preferably a gourd-shaped hole, wherein the larger hole with the larger diameter is the perforation portion 511, and the smaller hole with the smaller diameter is the stopper portion 512. The connection portion 121 and the stopper portion 122 are cylindrically shaped to fit the gourd-shaped hole. The diameter of the stopper portion 122 is smaller than that of the perforation portion 511 and larger than that of the stopper portion 512, while the diameter of the perforation portion 511 is not larger than that of the stopper portion 512. This arrangement facilitates the processing of the connection boss 12 and the connection hole 51. In other embodiments, the shapes of the perforated portion 511 and the limiting hole portion 512 may be rectangular, elliptical or other shapes, and the shapes of the limiting portion 122 and the connecting portion 121 may be adapted to the corresponding perforated portion 511 or limiting hole portion 512, or may not be adapted to the corresponding perforated portion 511 or limiting hole portion 512, as long as the perforated portion 511 can allow the connecting portion 121 and the limiting portion 122 to pass through, and the limiting hole portion 512 can limit the passing of the limiting portion 122.

[0076] In this embodiment, the connecting boss 12 is provided on the connecting block 1, and the connecting hole 51 is provided on the hinge mounting plate 5, which facilitates the processing of the hinge mounting plate 5 and the connecting block 1. In other embodiments, the connecting boss 12 may be provided on a side of the hinge mounting plate 5 away from the bottom of the longitudinal mounting groove 22, and the connecting hole 51 may be provided on the connecting block 1.

[0077] In this embodiment, the gourd hole is preferably arranged horizontally, and the limiting hole portion 512 is located on the side of the perforated portion 511 that is closer to the door body 40. Since the pulley portion 11 is used to guide the pull cord 4, the portion of the pull cord 4 wrapped around the pulley portion 11 is located on the side of the connecting block 1 that is away from the door body 40. The pull cord 4 forms an angle at the pulley portion 11 with its opening facing the door body 40. Therefore, when the door body 40 is opened or closed, the pressure applied by the pull cord 4 on the connecting block 1 always has a horizontal component of force directed horizontally toward the door body 40. Since the limiting hole portion 512 is arranged on the side of the perforated portion 511 that faces the door body 40, when the connecting boss 12 enters and is retained in the limiting hole portion 512, the connecting boss 12 abuts against the wall of the limiting hole portion 512 under the action of external force and does not pass through the perforated portion 511, thereby improving the tightness of the connection between the connecting boss 12 and the connecting hole 51. In other embodiments, the gourd hole may be tilted relative to the horizontal direction, and the limiting hole portion 512 is located on a side of the perforated portion 511 close to the door body 40 .

[0078] In order to prevent the connecting block 1 from rotating relative to the hinge mounting plate 5, in the embodiment, the base 2 is provided with a rotation-stopping structure for limiting the rotation of the connecting block 1. Specifically, the connecting block 1 is outwardly provided with a limiting protrusion 13 on both sides corresponding to the longitudinal mounting groove 22, the rotation-stopping structure comprises the upper end surface of the base 2 and the side groove wall of the mounting groove close to the door body 40, and one limiting protrusion 13 close to the door body 40 is in surface contact with the corresponding groove wall, and the lower side of the limiting protrusion 13 away from the door body 40 abuts against the upper end surface of the base 2. In this way, the arrangement of the limiting protrusion 13 does not hinder the assembly of the connecting block 1 and the hinge mounting plate 5, and during the opening of the door body 40, when the hinge 6 applies an obliquely upward pulling force to the pull rope 4, the connecting block 1 has a tendency to rotate clockwise, but since one limiting protrusion 13 is in surface contact with the side groove wall of the longitudinal mounting groove 22 close to the door body 40, the groove wall can limit the clockwise rotation of the connecting block 1; during the closing of the door body 40, when the tension spring 3 applies an obliquely downward force to the pull rope 4, the connecting block 1 has a tendency to rotate counterclockwise, but since the lower side of the limiting protrusion 13 away from the door body 40 abuts against the upper end surface of the base 2, the connecting block 1 is limited from rotating counterclockwise. In this way, the connecting boss 12 can be stably arranged in the limiting hole portion 512 during the opening and closing of the door body 40, and the connection stability of the hinge mounting plate 5 and the connecting block 1 is improved.

[0079] In order to further improve the connection stability of the connecting block 1 on the hinge mounting plate 5, in the embodiment, one limiting protrusion 13 close to the door body 40 is outwardly provided with a plug-in protrusion 14 in the direction towards the door body 40, and the corresponding groove wall of the longitudinal mounting groove 22 is provided with a plug-in groove 221, the plug-in protrusion is inserted into the plug-in groove 221 and abuts against the upper side groove wall of the plug-in groove 221. The arrangement of the plug-in groove 221 can also prevent the connecting block 1 from moving along the axial direction of the pulley portion 11.

[0080] In the embodiment, the connecting block 1 comprises two oppositely and spaced apart connecting plate portions 15, the pulley portion 11 is arranged between the two connecting plate portions 15, and the guide circular arc surface of the pulley portion 11 forms a guide sliding groove 112 between the two connecting plate portions 15. The limiting protrusion 13 is outwardly provided by the connecting plate portion 15 in the direction perpendicular to the axial direction of the pulley portion 11. Each connecting plate portion 15 is provided with a limiting protrusion 13 on both sides, and the plug-in groove 221 is correspondingly provided with two plug-in grooves.

[0081] In the embodiment, in order to further limit the movement of the connecting block 1 along the axial direction of the pulley portion 11, preferably, the upper end surface of the base 2 is provided with a limiting clamping groove 26 corresponding to the two limiting protrusions 13, the width of the limiting clamping groove 26 is equal to the width of the limiting protrusion 13 along the axial direction of the pulley portion 11, and the two limiting protrusions 13 are respectively clamped in the limiting clamping groove 26 and abut against the groove bottom of the limiting clamping groove 26.

[0082] In this embodiment, the pull rope 4 is wound in the guide slot 112 of the connecting block 1. In order to prevent the pull rope 4 from being separated from the guide slot 112, preferably, a limiting structure is provided on the connecting block 1 to prevent the pull rope 4 from being dislodged. Specifically, the limiting structure includes an extension arm portion 16 relatively arranged on both axial sides of the pulley portion 11, one end of the extension arm portion 16 is connected to the corresponding end face of the pulley portion 11, and the other end extends radially away from the pulley portion 11. The end of the extension arm portion 16 is provided with a locking protrusion 161 in the direction toward the other extension arm portion 16, and the distance between the two locking protrusions 161 is less than the diameter of the pull rope 4. The use of two relatively arranged locking protrusions 161 to form a limiting structure that restricts the pull rope 4 from being dislodged has a simple structure and is easy to set up. In other embodiments, the extension arm portion 16 may not be provided, and the locking protrusions 161 may be directly extended from the opposite end faces of the pulley portion 44.

[0083] In this embodiment, to further enhance the mounting stability of the connecting block 1 and the hinge mounting plate 5 and to provide alternative mounting methods for the connecting block 1 and the hinge mounting plate 5, the connecting block 1 is preferably provided with a fixing hole 17, and the hinge mounting plate 5 is provided with a threaded connection hole 51. The fixing hole 17 and the threaded connection hole 51 are connected by a threaded fastener. More preferably, the fixing hole 17 and the connecting boss 12 are respectively provided on the upper and lower sides of the pulley portion 11, which facilitates enhancing the mounting stability of the connecting block 1 on the hinge mounting plate 5.

[0084] Figure 11 This is a schematic diagram of the structure of the hook provided by an embodiment of the present invention in one direction. Figure 12 is a schematic diagram of the structure of the hook provided by an embodiment of the present invention in another direction, such as Figure 8 、 Figure 11 and Figure 12 As shown, in this embodiment, the pull cord 4 passes through the connecting block 1 and is connected to the hinge 6. A hinge shaft 52 is protruding outward from the side of the hinge mounting plate 5 near the door body 40. The hinge 6 is fixed to the inner side of the door body 40, and a rotating shaft slot 61 is formed on the hinge 6. The hinge shaft 52 is fixed in the rotating shaft slot 61 and can rotate relative to the rotating shaft slot 61. Therefore, when the door body 40 is opened and closed, the hinge 6 can rotate relative to the hinge shaft 52 and the hinge mounting plate 5, thereby driving the door body 40 to rotate relative to the housing 30.

[0085] The hinge 6 has a connecting arm extending away from the door body 40, and the connecting arm is provided with a hook portion 62 for hooking the pull rope 4. One end of the pull rope 4 is provided with a hook 7, and the hook 7 is provided with a hook shaft 72 for hooking the hook portion 62. More preferably, in the embodiment, in order to improve the hooking stability of the hook portion 62 and the hook 7, the hook 7 includes two hook plate portions 71 oppositely and spacedly arranged, and the hook shaft 72 is arranged between the two hook plate portions 71 and is perpendicular to the two hook plate portions 71 respectively. The hook portion 62 is in a U-shaped structure with an opening facing upward, and when the hook portion 62 is hooked with the hook 7, the hook portion 62 extends into the space between the two hook plate portions 71, and the hook shaft 72 is hooked in a U-shaped hook groove 621 of the U-shaped structure. In this way, the hook portion 62 extends into the space between the two hook plate portions 71, so that the hook plate portions 71 can limit the hook portion 62, prevent the hook portion 62 from moving along the axial direction of the hook shaft 72 and disengaging from the hook shaft 72, and improve the hooking stability of the hook shaft 72 and the hook portion 62. In other embodiments, the two hook plate portions 71 can not be arranged, and a limiting step or a retaining ring can be arranged on the hook shaft 72 to limit the movement of the hook portion 62 along the axial direction of the hook shaft 72.

[0086] In the embodiment, in order to ensure that the hook 7 and the hook portion 62 do not disengage during the rotation of the hinge 6, preferably, the hook 7 is provided with an anti-disengagement structure for preventing the hook 7 and the hook portion 62 from disengaging. The anti-disengagement structure abuts against the outer side wall of the hook portion 62, and when the hinge 6 rotates, the anti-disengagement structure slides along the outer side wall of the hook portion 62. By arranging the anti-disengagement structure, the hook portion 62 is clamped between the anti-disengagement structure and the hook shaft 72, so that during the rotation of the hinge 6, the hook shaft 72 slides along the groove wall of the hook groove 621 of the hook portion 62, and the anti-disengagement structure slides along the outer side wall of the hook portion 62, thereby effectively preventing the disengagement of the hook portion 62 and the hook shaft 72.

[0087] In the embodiment, in order to reduce the sliding friction between the anti-disengagement structure and the hook portion 62, preferably, the horizontal edge of the U-shaped structure of the hook portion 62 is in a circular arc structure with an opening facing the groove, so that the two vertical edges of the U-shaped structure are smoothly connected through the circular arc structure, and the anti-disengagement structure abuts against the outer side wall of the circular arc structure. In this way, since the horizontal edge of the U-shaped structure is in a circular arc structure and the vertical edges are in a linear structure, when the hook portion 62 rotates relative to the hook 7, the anti-disengagement structure can only slide along the outer side wall of the circular arc structure, and when the anti-disengagement structure slides along the circular arc structure to the vertical edge of the U-shaped structure, the anti-disengagement structure limits the relative rotation of the hook portion 62 relative to the hook 7 because the anti-disengagement structure cannot continue to slide along the vertical edge of the U-shaped structure, thereby further ensuring that the hook 7 and the hook portion 62 do not disengage.

[0088] In this embodiment, the anti-slip structure preferably includes an anti-slip protrusion 73 disposed between the two hanging plates 71. One end of the anti-slip protrusion 73 is connected to the bottom of the U-shaped groove formed between the two hanging plates 71, and the other end abuts the outer wall of the hook portion 62. By disposing the anti-slip protrusion 73 within the two hanging plates 71, the anti-slip protrusion 73 can be protected and prevented from breaking during assembly or transportation. More preferably, the hanging plates 71 have a viewport 711 at the position corresponding to the anti-slip protrusion 73, which helps reduce the weight of the hook 7 and allows for observation of the status of the anti-slip protrusion 73.

[0089] In this embodiment, a fixing portion 74 for fixing the pull rope 4 is provided on the hook 7. The fixing portion 74 is located on the same side of the two hanging plate portions 71 and is respectively connected to the two hanging plate portions 71. Preferably, the fixing portion 74 is a cylindrical structure, and the two hanging plate portions 71 are arranged on the outer peripheral wall of the cylindrical structure along the axial direction of the cylindrical structure. A rope through-hole 741 is provided on the fixing portion 74, and the end of the pull rope 4 is passed through the rope through-hole 741. In this embodiment, in order to improve the connection stability between the pull rope 4 and the fixing portion 74, the fixing portion 74 and the pull rope 4 are formed into one piece by injection molding. In other embodiments, the pull rope 4 can also be tied to the fixing portion 74.

[0090] In this embodiment, when the door 40 is in the closed state, the rope through-hole 741 is preferably arranged vertically, which helps to reduce the size of the hook 7 while ensuring a sufficient connection length between the drawstring 4 and the hook 7. More preferably, the end of the hook 7 facing the drawstring 4 is an arc structure with the opening facing the hook 7, which can prevent the sharp corners of the hook 7 from scratching or cracking the drawstring 4.

[0091] In this embodiment, a stop block 42 is further fixed to the drawstring 4, and the stop block 42 is located between the connecting block 1 and the hook 7. When the door 40 is in the closed state, the stop block 42 contacts the upper side of the connecting block 1, and the drawstring 4 located between the stop block 42 and the hook 7 is in a relaxed state. With this arrangement, when the door 40 is opening and the door 40 is rotated relative to the housing 30 at an angle less than a first predetermined angle, the drawstring 4 is in a relaxed state. At this time, the force for opening the door 40 cannot be transmitted to the tension spring 3 via the drawstring 4, and the door 40 is in a free-opening state, which can reduce the resistance to opening the door 40. When the door body 40 is rotated to the first preset angle, the pull rope 4 between the stop block 42 and the hook 7 changes from a relaxed state to a stretched state. After the door body 40 continues to rotate, the pull rope 4 drives the stop block 42 to disengage from the connecting block 1. The pull rope 4 pulls the tension spring 3, and the door body 40 rotates under the tension of the pull rope 4 and gravity until the force on the door body 40 is balanced and the door body 40 hovers at the second preset angle.

[0092] In this embodiment, the connecting block 1 preferably has a positioning surface on the side facing the hook 7, which is inclined from top to bottom toward the door body 40. The side of the stop block 42 facing away from the hook 7 is flat. When the door body 40 is closed, the stop block 42 is located on the positioning surface, and the draw cord 4 extending from the connecting block 1 is perpendicular to the positioning surface and the stop block 42. This arrangement helps ensure that the draw cord 4 does not bend at the stop block 42, which would affect the pulley portion 11's guiding effect on the draw cord 4. On the other hand, it ensures that the draw cord 4 does not pull on the stop block 42 when it is relaxed.

[0093] In this embodiment, the lower end of the positioning surface is connected to an arcuate guide surface with an opening toward the hook 7. The arcuate guide surface and the positioning surface are smoothly transitioned to each other, which helps to prevent the structure on the connecting block 1 from hindering the pull rope 4 from pulling the positioning block to move.

[0094] In this embodiment, in order to improve the connection stability between the pull rope 4 and the stop block 42 , the pull rope 4 is integrally formed with the stop block 42 during the injection molding process of the stop block 42 .

[0095] In this embodiment, the length of the pull rope 4 between the stop block 42 and the hook 7 can be set according to the required size of the first preset angle, and this embodiment does not limit this.

[0096] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A door adjustment mechanism, characterized in that: include: Base (2); a tension spring (3) arranged horizontally on the base (2), with one end of the tension spring (3) connected to the base (2); A pull rope (4), one end of which is connected to the other end of the tension spring (3); A connecting block (1), wherein the connecting block (1) is provided with a pulley portion (11), A hinge (6) is provided on the door body, and the other end of the pull rope (4) passes around the pulley portion (11) and is connected to the hinge (6); A hinge mounting plate (5), the hinge (6) being rotatably connected to the hinge mounting plate (5), one of the hinge mounting plate (5) and the connecting block (1) being provided with a connecting boss (12), the other of the hinge mounting plate (5) and the connecting block (1) being provided with a connecting hole (51), the connecting boss (12) being engaged with the connecting hole (51); The base (2) is provided with a rotation-stopping structure for limiting the rotation of the connecting block (1); A longitudinal mounting groove (22) is provided on the base (2), and the hinge mounting plate (5) and the connecting block (1) are both arranged in the longitudinal mounting groove (22); The connecting block (1) is provided with limiting protrusions (13) on both sides along the width direction of the longitudinal mounting groove (22), the limiting protrusion (13) close to the door body (40) contacts the groove wall surface of the longitudinal mounting groove (22), and the lower side of the other limiting protrusion (13) abuts against the upper end surface of the base (2) to limit the rotation of the connecting block (1).

2. The door adjustment mechanism according to claim 1, characterized in that: The connecting boss (12) comprises a connecting portion (121) and a limiting portion (122) arranged along the axial direction of the pulley portion (11), wherein the limiting portion (122) is connected to an end of the connecting portion (121) away from the pulley portion (11); the connecting hole (51) comprises a perforated portion (511) through which the limiting portion (122) can pass and a limiting hole portion (512) that limits the limiting portion (122) from passing through, and the connecting portion (121) can slide from the perforated portion (511) into the limiting hole portion (512).

3. The door adjustment mechanism according to claim 2, characterized in that: The connecting hole (51) is a gourd hole, the large hole of the gourd hole is the perforated portion (511), the small hole of the gourd hole is the limiting hole portion (512), and the connecting portion (121) and the limiting portion (122) are both cylindrical.

4. The door adjustment mechanism according to claim 3, characterized in that: The center line connecting the perforated portion (511) and the limiting hole portion (512) is arranged horizontally, and when the connecting hole (51) is located on the hinge mounting plate (5), the limiting hole portion (512) is located on the side of the perforated portion (511) facing the door body (40); when the connecting hole (51) is located on the connecting block (1), the limiting hole portion (512) is located on the side of the perforated portion (511) away from the door body (40).

5. The door adjustment mechanism according to claim 1, characterized in that: A plug-in slot (211) is provided on a slot wall of the longitudinal mounting slot (22) close to the door body (40), and a plug-in protrusion (14) is provided on the corresponding limiting protrusion (13) on the connecting block (1) in a direction toward the door body (40), and the plug-in protrusion (14) is inserted into the plug-in slot (211).

6. The door adjustment mechanism according to any one of claims 1 to 4, characterized in that: The connecting block (1) is provided with a limiting structure for preventing the pull rope (4) from being separated from the pulley portion (11).

7. The door adjustment mechanism according to claim 6, characterized in that: The limiting structure comprises a clamping protrusion (161) arranged on both axial sides of the pulley portion (11), one end of the clamping protrusion (161) is connected to the corresponding end surface of the pulley portion (11), and the other end extends in a direction toward the other clamping protrusion (161), and the distance between the two clamping protrusions (161) is smaller than the diameter of the pull rope (4).

8. A dishwasher, characterized in that: It comprises a door adjustment mechanism as described in any one of claims 1-7.

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