Door opening and closing device and dish washing machine

Abstract

The utility model discloses a door opening and closing device and a dish washing machine, and relates to the field of household appliances. The door opening and closing device comprises a rope body connected between a door body and a machine body of the household appliance, at least one section of the rope body is a magnetic control telescopic assembly, the magnetic control telescopic assembly comprises a telescopic body and a coil arranged on the telescopic body, and the size of the telescopic body in the extending direction of the rope body is the length of the telescopic body. The magnetically-controlled telescopic assembly can control the length change of the telescopic body by adjusting the current of the coil. The door opening and closing device further comprises an adjusting module which adjusts the current of the coil according to the switching signal. According to the door opening and closing device, automatic control over opening and closing of the door body can be achieved, the rope body has the buffering effect relative to a connecting rod structure, a motor structure and the like, and the occupied space is small.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a door opening and closing device and a dishwasher. Background Art

[0002] As household appliances become more and more intelligent, automatic door opening and closing technology is increasingly being applied to household appliances. However, existing automatic door opening and closing technology can only partially open and close the door of household appliances, for example, automatically controlling the unlocking of the door of household appliances, but cannot fully control the opening and closing of the door.

[0003] In the prior art, some solutions have appeared that use more complicated connecting rod structures to achieve the opening and closing control of the door body. However, due to the excessive complexity, the volume required is large and the scope of household appliances adapted is small. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a door opening and closing device, which can realize automatic control and adjustment of the door opening and closing and occupies a small space.

[0005] The utility model also provides a dishwasher with the door opening and closing device.

[0006] According to the embodiment of the utility model, the door opening and closing device includes a rope body connected between the door body and the body of the household appliance, at least one section of the rope body is a magneto-telescoping component, the magneto-telescoping component includes a telescopic body and a coil arranged on the telescopic body, the dimension of the telescopic body in the extension direction of the rope body is the length of the telescopic body, and the magneto-telescoping component is configured to adjust the length of the telescopic body by adjusting the current of the coil, thereby adjusting the length of the rope body.

[0007] The door opening and closing device further comprises: an adjusting module, the adjusting module being electrically connected to the magnetostrictive assembly to adjust the current of the coil. The adjusting module is used to receive and / or judge the opening and closing signal of the door body.

[0008] According to the door opening and closing device of the embodiment of the utility model, a magnetically controlled telescopic component is arranged in the rope body, and the length of the telescopic body can be changed by controlling the current in the coil, thereby changing the length of the rope body as a whole. In actual application, such a door opening and closing device can realize automatic opening and closing of the door body on some products according to product requirements, and realize passive adjustment of the door body by the adjustment module after passive opening and closing on some products, so that the door body can remain in a stable state after passive opening and closing. Among them, the scheme of adjusting the door body opening and closing by changing the length of the rope body, compared with the connecting rod structure, motor structure, etc. in the prior art, on the one hand, the flexibility of the rope body can be used to buffer the door body opening and closing, and on the other hand, the overall space occupied is small.

[0009] In some embodiments, the telescopic body is a magnetorheological elastomer, and the coil is surrounded on the outside of the magnetorheological elastomer.

[0010] Furthermore, the telescopic body includes: a central section and connecting sections located at both ends of the central section, and the magneto-telescoping assembly also includes a sleeve sleeved on the outside of the central section, and the coil is arranged in the sleeve.

[0011] Furthermore, the connecting section includes a connecting piece, and the magnetostrictive assembly further includes: clamping pieces located on both sides of the connecting piece, the clamping pieces on both sides are connected to clamp the connecting piece, and the rest of the rope body is connected to the clamping pieces.

[0012] Furthermore, the magnetostrictive assembly also includes a fixing wire, the two ends of the fixing wire are respectively a first end and a second end, the rest of the rope body is connected to the first end of the fixing wire, and the second end of the fixing wire is connected to the clamping piece.

[0013] Specifically, fixing holes are respectively provided on the clamping pieces at both sides of the connecting piece, and a fixing column is provided at the second end of the fixing line, and the fixing column is inserted into the fixing holes of the two clamping pieces at the same time.

[0014] In some specific embodiments, the magnetostrictive assembly further includes: permanent magnets disposed at both ends of the telescopic body.

[0015] Furthermore, the magnetostrictive assembly further comprises: a magnetostrictive mounting sheet, wherein there are two magnetostrictive mounting sheets, the two magnetostrictive mounting sheets are respectively connected to two ends of the telescopic body in the length direction, and the permanent magnet is arranged on the magnetostrictive mounting sheets.

[0016] In some embodiments, the adjustment module includes: a sensor, the sensor being an angle sensor or a distance sensor, for detecting an opening angle of the door body relative to the machine body;

[0017] Alternatively, the adjustment module includes: a first adjustment member, a second adjustment member and a resistance detection member, wherein one of the first adjustment member and the second adjustment member is suitable for being arranged on the machine body, and the other is suitable for being connected to the door body, a resistor and a sliding piece sliding on the resistor are arranged in the first adjustment member, the second adjustment member is connected to the sliding piece, and the resistance detection member is used to detect the resistance value of the first adjustment member.

[0018] In some embodiments, the regulating module includes: a current detection element for detecting instantaneous current changes of the coil to sense the switch state of the door body.

[0019] In some embodiments, at least one section of the rope is a spring.

[0020] Specifically, a section of the rope body is a flexible rope, one end of the spring is used to connect to the machine body, one end of the flexible rope is used to connect to the door body, and the magnetically controlled telescopic assembly is connected between the spring and the flexible rope; the door opening and closing device also includes a steering wheel connected to the machine body, and the steering wheel supports the flexible rope.

[0021] According to the dishwasher of the embodiment of the utility model, it includes: a machine body, on which a rotating shaft is arranged; a door body, the lower end of which is connected to the rotating shaft; a door opening and closing device, which is the door opening and closing device described in the above embodiment, the two ends of the rope body are respectively connected to the machine body and the door body, and the connection point between the rope body and the door body is spaced apart from the rotating shaft.

[0022] According to the dishwasher of the embodiment of the utility model, by setting the door opening and closing device of the above embodiment, the door opening and closing device can change the length of the telescopic body by setting a magnetically controlled telescopic component in the rope body and controlling the current in the coil, thereby changing the length of the entire rope body. When the length of the rope body changes, the opening range of the door body can change, that is, automatic control of the complete opening and closing of the door body is achieved.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a structural schematic diagram of a dishwasher according to an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A schematic structural diagram of a magnetostrictive assembly of a dishwasher in the illustrated embodiment;

[0027] Figure 3 yes Figure 2 An exploded structural diagram of the magnetostrictive assembly of the illustrated embodiment;

[0028] Figure 4 is a structural diagram of the second adjusting member in some embodiments.

[0029] Reference numerals:

[0030] Dishwasher 1000,

[0031] Door opening and closing device 100,

[0032] Rope body 10.

[0033] Magnetron telescopic assembly 11,

[0034] Telescopic body 111, central section 111a, connecting section 111b, connecting piece 1111,

[0035] Sleeve 112,

[0036] Clamping piece 113, fixing hole 1131,

[0037] The fixing line 114, the first end 114a, the second end 114b, the fixing column 1141,

[0038] Magnetic control mounting plate 115,

[0039] Spring 12, flexible rope 13, steering wheel 14,

[0040] Adjustment module 40, first adjustment member 41, second adjustment member 42, connecting rod 421, rotating cam 422,

[0041] body 200, shaft 210,

[0042] Door body 300. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "length", "upper", "lower", "inner", "outer", "axial" and the like indicate positions or positional relationships based on the positions 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, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The door opening and closing device 100 and the dishwasher 1000 according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0047] like Figure 1 As shown, the door opening and closing device 100 according to the embodiment of the utility model comprises a rope body 10 connected between the door body 300 and the body 200 of the household appliance, at least one section of the rope body 10 is a magneto-telescoping assembly 11, the magneto-telescoping assembly 11 comprises a telescopic body 111 and a coil arranged on the telescopic body 111, and the dimension of the telescopic body 111 in the extension direction of the rope body 10 is the length of the telescopic body 111. The magneto-telescoping assembly 11 is configured to adjust the length of the telescopic body 111 by adjusting the current on the coil.

[0048] It is understandable that the door body 300 on the body 200 of many household appliances is connected to the rope body 10, and the opening and closing of the door body 300 is controlled by controlling the length of the rope body 10. For example, some household appliances are provided with the door body 300 at the bottom of the body 200, and the door body 300 is suspended at the bottom of the body 200 through the rope body 10. When the rope body 10 is shortened, the tension of the rope body 10 overcomes the gravity of the door body 300, and the door body 300 is gradually closed. When the rope body 10 is extended, the gravity of the door body 300 overcomes the tension of the rope body 10, and the door body 300 is gradually opened. For another example, some household appliances are provided with the door body 300 on the side of the body 200, and the rope body 10 is the shortest when the door body 300 is closed. When the door body 300 is opened by an external force, the opening angle of the door body 300 gradually increases under the action of the gravity of the door body 300, and the length of the rope body 10 gradually increases during this process. Therefore, in the present application, the opening and closing state of the door body 300 can be adjusted by adjusting the length of the rope body 10. The length of the rope body 10 can be achieved by adjusting the current of the coil of the magnetic control telescopic component 11, so that the automatic opening and closing of the door body 300 can be achieved.

[0049] In this application, if Figure 1As shown, the door opening and closing device 100 further includes: an adjustment module 40, which is electrically connected to the magnetostrictive assembly 11 to adjust the current of the coil. The adjustment module 40 is used to receive and / or determine the switch signal of the door body 300. Here, the switch signal of the door body 300 may be sent to the adjustment module 40 from the outside, or may be determined by the adjustment module 40 itself based on the detected information.

[0050] When the adjustment module 40 is used to receive the switch signal of the door body 300, for example, the household appliance has a central control device or a remote control, the central control device or the remote control sends a signal of opening or closing the door to the adjustment module 40, and the adjustment module 40 controls the magnetic control telescopic component 11 to adjust the current of the coil after receiving the signal, thereby adjusting the length of the rope body 10 to open or close the door body 300. The switch signal is not limited to the two signals of fully open and fully closed, and more switch signals can be set according to the use requirements of the household appliance, such as "opening amplitude increases by 15 degrees" signal, "opening amplitude decreases by 5 degrees" signal, "opening after 20 minutes of heating stop" signal, etc.

[0051] When the adjustment module 40 is used to determine the switch signal of the door body 300, the expected state of the user's action can be determined according to various signals, and then according to the expected state, the adjustment module 40 controls the magnetic control telescopic component 11 to adjust the current of the coil, so that the length of the rope body 10 changes to the length in the expected state. Specifically, when the door body 300 is in a closed state, when the user pulls the door body 300 outward by 5 degrees, the adjustment module 40 detects that the opening amplitude of the door body 300 changes to +5 degrees, and determines that the expected state of the user's action is to fully open the door body 300. Based on this, the adjustment module 40 controls the magnetic control telescopic component 11 to adjust the current of the coil, so that the rope body 10 becomes longer, and then the door body 300 gradually moves toward full opening. When the door body 300 is in a fully open state, when the user pushes the door body 300 inward by 5 degrees, the adjustment module 40 detects that the opening amplitude of the door body 300 changes to -5 degrees, and determines that the expected state of the user's action is to completely close the door body 300. Based on this, the adjustment module 40 controls the magnetostrictive telescopic component 11 to adjust the current of the coil, so that the rope body 10 becomes shorter, and then the door body 300 gradually moves towards full closure.

[0052] In another embodiment, when the adjustment module 40 is used to receive the switch signal of the door body 300, the door body 300 is currently opened or closed to a certain state. After the adjustment module 40 detects the current state, the adjustment module 40 controls the magnetic control telescopic component 11 to adjust the current of the coil, so that the length of the rope body 10 is adjusted to a length that is adapted to the current state, so that the door body 300 can be stably maintained in the current state. For example, at least one section of the rope body 10 is a spring 12. When the door body 300 is suddenly opened by the user from a completely closed state to a position 15 mm away from the body, the magnetic control telescopic component 11 has not actively adjusted the current of the coil, that is, it has not actively adjusted the length of the telescopic body 111. The door body 300 is pulled open by an external force, which will lengthen the spring 12. As the spring 12 becomes longer, the tension will increase, which will pull the door body 300 in the direction of closing. The adjustment module 40 detects the change in the switch state of the door body 300, calculates and determines the length of the telescopic body 111 that needs to change when the door body 300 is 15 mm away from the body, and then actively adjusts the current of the coil through the magnetic control telescopic component 11, so that the length of the rope body 10 is actively changed to the length in this state. Therefore, when the user has not released the door body 300, the length of the rope body 10 changes to the stable length required in this state, and the door body 300 can still be stably maintained in this state after being released by the user.

[0053] That is to say, at this time, the door body 300 is not actively opened or closed by the rope body 10, but is opened or closed by external forces (such as human, door lock mechanism, etc.), and the adjustment module 40 passively adjusts after obtaining the state of the door body 300, so that the door body 300 is stably maintained in this state. The change in the opening and closing state of the door body 300 obtained by the adjustment module 40 is also a switch signal, which can be obtained by detecting the position of the door body 300, or by detecting the change in the potential force on the rope body 10.

[0054] Therefore, the door opening and closing device 100 is configured in this way, and through the acquisition or re-judgment of the switch signal, in some embodiments, the door body 300 can be automatically opened and closed, and in some embodiments, the door body 300 can be maintained in a stable state after passive opening and closing.

[0055] Among them, the solution of adjusting the opening and closing of the door body 300 by changing the length of the rope body 10 is compared with the connecting rod structure, motor structure, etc. in the prior art. On the one hand, the flexibility of the rope body 10 can buffer the opening and closing of the door body 300, and on the other hand, the overall space occupied is smaller.

[0056] It should be noted that when a current passes through the coil, the coil will generate a magnetic field, and the strength of the magnetic field is affected by the magnitude of the current. In many possible implementations, the length of the telescopic body 111 can change with the strength of the magnetic field. Therefore, by adjusting the current of the coil, the automatic adjustment control of the opening and closing state of the door body 300 can be finally achieved.

[0057] For example, in some embodiments, Figure 2 , Figure 3 As shown, the telescopic body 111 is a magnetorheological elastomer, and the coil is surrounded on the outside of the magnetorheological elastomer.

[0058] It should be noted that the elastic modulus of magnetorheological elastomers can change with the intensity of the external magnetic field, and it has high-tech characteristics such as controllability, reversibility, and rapid response, as well as unique advantages such as good stability.

[0059] Therefore, when the current in the coil changes, the magnetic field strength in the coil also changes, so that the elastic modulus of the magnetorheological elastomer changes synchronously under the influence of the magnetic field, thereby changing the deformation of the magnetorheological elastomer, causing the overall length of the pull rope to change, thereby achieving control of the opening angle of the door body 300.

[0060] Specifically, when the current in the coil decreases, the magnetic field strength in the coil decreases, which reduces the elastic modulus of the magnetorheological elastomer, so that the contraction force provided by the magnetorheological elastomer is less than the tension in the rope body 10, and the magnetorheological elastomer increases in deformation under the action of the tension, which increases the overall length of the rope body 10 and controls the opening angle of the door body 300. At the same time, the increase in the deformation of the magnetorheological elastomer increases the contraction force provided by the magnetorheological elastomer until the contraction force provided by the magnetorheological elastomer is finally equal to the tension in the rope body 10, so that the door body 300 can be stabilized at a larger opening angle.

[0061] Correspondingly, when the current in the coil increases, the magnetic field strength in the coil increases, which increases the elastic modulus of the magnetorheological elastomer, so that the contraction force provided by the magnetorheological elastomer is greater than the tension in the rope body 10, and the magnetorheological elastomer is deformed less under the action of the contraction force, so that the overall length of the rope body 10 is reduced, and the opening angle of the controlled door body 300 is reduced. At the same time, the reduction in the deformation of the magnetorheological elastomer reduces the contraction force provided by the magnetorheological elastomer, until the contraction force provided by the magnetorheological elastomer is finally equal to the tension in the rope body 10, so that the door body 300 can be stabilized at a smaller opening angle.

[0062] Furthermore, if Figure 3As shown, the telescopic body 111 includes: a central section 111a and connecting sections 111b located at both ends of the central section 111a, and the magnetostrictive assembly 11 also includes a sleeve 112 sleeved on the outside of the central section 111a, and the coil is arranged in the sleeve 112. Therefore, the sleeve 112 can protect the coil and reduce the risk of leakage when the coil is powered on. The central section 111a of the telescopic body 111 is arranged on the inner side of the sleeve 112, that is, the central section 111a is located on the inner side of the coil, and the magnetic field strength at various locations inside the coil is relatively uniform, so that the length of the central section 111a can be controlled to produce stable changes when the coil is powered on.

[0063] Furthermore, if Figure 3 As shown, the connecting section 111b includes a connecting piece 1111, and the magnetostrictive assembly 11 further includes: clamping pieces 113 located on both sides of the connecting piece 1111, the clamping pieces 113 on both sides are connected to clamp the connecting piece 1111, and the rest of the rope body 10 is connected to the clamping pieces 113. Thus, the clamping pieces 113 and the connecting piece 1111 are kept fixed, so that the clamping pieces 113 can move synchronously with the connecting piece 1111.

[0064] At the same time, by setting the width of the clamping piece 113 to be larger than the inner diameter of the sleeve 112, the clamping piece 113 can stop at one end of the sleeve 112, ensuring that the clamping piece 113 is always located at one side of the sleeve 112, so that the connecting piece 1111 clamped by the clamping piece 113 is also located at one side of the sleeve 112. By clamping the clamping piece 113 on both connecting pieces 1111 of the telescopic body 111, it can be ensured that the two connecting pieces 1111 are located on both sides of the axial direction of the sleeve 112, that is, it is ensured that the two connecting sections 111b of the telescopic body 111 are always located on both sides of the axial direction of the sleeve 112, thereby ensuring that the central section 111a is always located in the sleeve 112, which can reduce or prevent the telescopic body 111 from axially disengaging from the sleeve 112.

[0065] Furthermore, if Figure 2 , Figure 3 As shown, the magnetostrictive assembly 11 further includes a fixing wire 114, the two ends of the fixing wire 114 are respectively a first end 114a and a second end 114b, the rest of the rope body 10 is connected to the first end 114a of the fixing wire 114, and the second end 114b of the fixing wire 114 is connected to the clamping piece 113. Thus, the magnetostrictive assembly 11 is connected to the rope body 10 through the fixing wire 114, wherein the two ends of the fixing wire 114 are respectively connected to the clamping piece 113 and the rest of the rope body 10.

[0066] It can be understood that when the length of the magnetorheological elastomer increases, the distance between the connecting pieces 1111 at both ends increases, that is, the overall length of the magnetostrictive assembly 11 increases, and the movement of the connecting piece 1111 is transmitted to the rest of the rope body 10 via the clamping piece 113 and the fixing line 114, so that the overall length of the rope body 10 increases.

[0067] Specifically, there are multiple fixing wires 114, and the first ends 114a of the multiple fixing wires 114 are concentrated and connected to the rest of the rope body 10, so that the tension between the multiple fixing wires 114 is relatively balanced, and the second ends 114b of the multiple fixing wires 114 are dispersedly connected to the clamping piece 113. As a result, the clamping piece 113 is subjected to the tension of the fixing wires 114 at multiple different positions at the same time, and the tension of the clamping piece 113 at different positions is relatively balanced, so that the tension of the rope body 10 can be stably transmitted to the clamping piece 113, thereby ensuring the stability of force transmission between the magnetostrictive assembly 11 and the rest of the rope body 10.

[0068] In some embodiments, Figure 3 As shown, the clamping pieces 113 on both sides of the connecting piece 1111 are respectively provided with fixing holes 1131, and the second end 114b of the fixing wire 114 is provided with a fixing column 1141, and the fixing column 1141 is simultaneously inserted into the fixing holes 1131 of the two clamping pieces 113. Thus, by inserting and fixing the fixing column 1141 into the fixing hole 1131, the second end 114b of the fixing wire 114 can be fixed on the clamping piece 113. At the same time, the fixing wire 114 is simultaneously fixed to the two clamping pieces 113 on both sides of the connecting piece 1111, so that the relative position between the two clamping pieces 113 is also kept fixed, thereby improving the stability of the clamping piece 113 clamping the connecting piece 1111.

[0069] In addition, since the two clamping plates 113 are fixedly connected to the fixing line 114 at the same time, force can be transmitted between the two clamping plates 113 and the fixing line 114, thereby increasing the contact position and force points between the fixing line 114 and the clamping plates 113, and improving the force transmission stability between the fixing line 114 and the clamping plates 113.

[0070] In some specific embodiments, Figure 3 As shown, the magnetostrictive assembly 11 further includes permanent magnets disposed at both ends of the telescopic body 111 .

[0071] It is understandable that by providing a permanent magnet, when no current passes through the coil, the telescopic body 111 can produce a preset length change under the action of the magnetic field of the permanent magnet. When the magnetic field of the coil is in the same direction as the magnetic field of the permanent magnet, the total magnetic field strength increases, and the telescopic body 111 can be further extended under the action of the total magnetic field; and when the magnetic field of the coil is in the opposite direction to the magnetic field of the permanent magnet, the magnetic field of the permanent magnet can offset the magnetic field of the coil, so that the magnetic field strength of the total magnetic field is less than the magnetic field of the permanent magnet, even if the magnetic field strength in the environment where the telescopic body 111 is located is reduced, so that the length of the telescopic body 111 can be reduced.

[0072] Therefore, by providing the permanent magnet, the telescopic body 111 can have a preset elongation, and the length of the telescopic body 111 can have space for both elongation and shortening, which can improve the control range of the length change of the telescopic body 111.

[0073] Furthermore, the magnetostrictive assembly 11 further includes: a magnetostrictive mounting sheet 115, two magnetostrictive mounting sheets 115, the two magnetostrictive mounting sheets 115 are respectively connected to the two ends of the telescopic body 111 in the length direction, and the permanent magnet is arranged on the magnetostrictive mounting sheet 115. Thus, the two permanent magnets can be fixed at the two ends of the telescopic body 111 in the length direction, so that the magnetic field between the two permanent magnets is relatively uniform, so that the magnetic field effect of the permanent magnet on the telescopic body 111 is relatively uniform, and the stability of the permanent magnet controlling the length of the telescopic body 111 can be ensured.

[0074] Of course, the structure of the telescopic member 111 of the present application is not limited to magnetorheological elastomers, and the internal structure can also be set with reference to the structure of a linear motor.

[0075] In some embodiments, Figure 1 As shown, the rope body 10 further includes: a spring 12 and a flexible rope 13, one end of the spring 12 is used to connect to the machine body 200, one end of the flexible rope 13 is used to connect to the door body 300, and the magnetic control telescopic assembly 11 is connected between the spring 12 and the flexible rope 13. It can be understood that the flexible rope 13 is subjected to the tension from the door body 300, and the tension on the flexible rope 13 can be transmitted to the spring 12 through the magnetic control telescopic assembly 11. When the spring 12 is subjected to the tension, the length increases and the contraction force increases, so that the overall length of the rope body 10 increases and the tension in the rope body 10 increases.

[0076] Thus, by connecting the spring 12 as a part of the rope body 10, the spring 12 has the function of adjusting the length of the rope body 10 and the tension of the rope body 10, so that the tension of the rope body 10 and the gravity of the door body 300 can be balanced, thereby improving the stability of the door body 300 when opening. At the same time, the vibration of the door body 300 can be transmitted to the spring 12 through the flexible rope 13 and the magnetically controlled telescopic assembly 11, and the spring 12 has a good buffering effect on the vibration, thereby absorbing the vibration of the door body 300, and further improving the stability of the door body 300 when opening.

[0077] In addition, the door opening and closing device 100 further includes a steering wheel 14 connected to the body 200, and the steering wheel 14 supports the flexible rope 13. Thus, the extension direction of the flexible rope 13 can be changed through the supporting effect of the steering wheel 14 on the flexible rope 13, so that the flexible rope 13 is connected to the door body 300 at a suitable angle.

[0078] It should be noted that the arrangement positions of the spring 12 and the flexible rope 13 in the rope body 10 may also have other solutions. For example, one end of the magneto-telescopic assembly 11 is connected to the machine body 200, one end of the flexible rope 13 is connected to the door body 300, and the spring 12 is connected between the magneto-telescopic assembly 11 and the flexible rope 13. For another example, one end of the spring 12 is connected to the machine body 200, one end of the magneto-telescopic assembly 11 is connected to the door body 300, and the flexible rope 13 is connected between the spring 12 and the magneto-telescopic assembly 11.

[0079] In some embodiments, the adjustment module 40 includes: a sensor, which is an angle sensor or a distance sensor, and is used to detect the opening angle of the door body 300 relative to the machine body 200 .

[0080] For example, when the door body 300 is rotated to open relative to the machine body 200, the adjustment module 40 includes an angle sensor, which can be arranged at the rotation axis 210 of the door body 300. When the door body 300 is rotated to open relative to the machine body 200, the adjustment module 40 includes a distance sensor, which can be arranged at one end of the door body 300 away from the rotation axis 210, and determines the opening range of the door body 300 by detecting the distance between the door body 300 and the machine body 200.

[0081] Compared with other solutions, the solution using sensors is simpler to assemble and can improve the adjustment accuracy of the adjustment module 40 by relying on the high accuracy of the sensors.

[0082] In other embodiments, Figure 4 As shown, the adjustment module 40 includes: a first adjustment member 41, a second adjustment member 42 and a resistance detection member (not shown in the figure), one of the first adjustment member 41 and the second adjustment member 42 is suitable for being set on the body 200, and the other is suitable for being connected to the door body 300, the first adjustment member 41 is provided with a resistor and a sliding piece sliding on the resistor, the second adjustment member is connected to the sliding piece, and the resistance detection member is used to detect the resistance value of the first adjustment member 41.

[0083] Therefore, the adjustment module 40 is equivalent to including a variable resistor whose resistance value is adjusted as the opening range of the door body 300 changes. The variable resistor can have different resistance values ​​under different opening ranges of the door body 300. The change in resistance value reflects the change in the opening range of the door body 300. The magnetostrictive component 11 adjusts the current on the coil according to the change, so that the length of the telescopic body 111 reaches a length adapted to the change.

[0084] With such arrangement, the damping of the resistor can be utilized, and a damping structure is added to the switch of the door body 300, which is beneficial for the door body 300 to open and close slowly and smoothly.

[0085] In some other embodiments, the adjustment module 40 includes: a current detection component for detecting the instantaneous current change of the coil to sense the switch state of the door body. That is to say, when the door body 300 is suddenly opened or closed, since the door body 300 is the load of the rope body 10, its instantaneous current will change when the load changes. At this time, the adjustment module 40 can determine whether the door body 300 is being opened or closed, and even according to the peak period of the instantaneous current change, it can determine the speed of the opening and closing action of the door body 300, and then determine the current opening amplitude of the door body 300 by calculating the speed and time. Therefore, after the adjustment module 40 detects the current state, the adjustment module 40 controls the magnetic control telescopic component 11 to adjust the current size of the coil, so that the length of the rope body 10 is adjusted to a length that is adapted to the current state, so that the door body 300 can be stably maintained in the current state.

[0086] In some specific embodiments, Figure 4 As shown, the second adjusting member 42 includes: a connecting rod 421 and a rotating cam 422. Among them, one end of the connecting rod 421 is slidably connected to the first adjusting member 41, and the other end of the connecting rod 421 is rotatably connected to the rotating cam 422. It can be understood that, taking the second adjusting member 42 as an example of connecting the door body 300, the rotating cam 422 is connected to the rotating shaft 210 of the door body 300. During the rotation of the door body 300, the rotating cam 422 rotates with the rotating shaft 210, and one end of the connecting rod 421 moves with the rotating cam 422 to drive the connecting rod 421 to move as a whole, so that the connecting rod 421 slides on the first adjusting member 41. As a result, the structure of the second adjusting member 42 is relatively simple, its operation is not easily blocked by other structures, and the failure rate of the structure can be reduced.

[0087] like Figure 1 As shown, a dishwasher 1000 according to an embodiment of the present invention includes: a body 200 , a door body 300 and a door opening and closing device 100 .

[0088] The machine body 200 is provided with a rotating shaft 210, and the lower end of the door body 300 is connected to the rotating shaft 210. The door opening and closing device 100 is the door opening and closing device 100 of the above embodiment, and the two ends of the rope body 10 are respectively connected to the machine body 200 and the door body 300, and the connection point between the rope body 10 and the door body 300 is spaced from the rotating shaft 210.

[0089] The dishwasher 1000 of the present application is provided with the door opening and closing device 100 of the above embodiment. The door opening and closing device 100 is provided with a magnetically controlled telescopic component 11 in the rope body 10, and the current in the coil is controlled to change the length of the telescopic body 111, thereby changing the overall length of the rope body 10. When the length of the rope body 10 changes, the opening angle of the door body 300 can change, that is, automatic control of the complete opening and closing of the door body 300 is achieved.

[0090] Other structures and operations of the door opening and closing device 100 and the dishwasher 1000 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0091] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A door opening and closing device, comprising a rope body connected between a door body and a body of a household appliance, characterized in that: At least one section of the rope body is a magneto-telescoping assembly, the magneto-telescoping assembly comprising a telescopic body and a coil provided on the telescopic body, the dimension of the telescopic body in the extension direction of the rope body being the length of the telescopic body, and the magneto-telescoping assembly being configured to adjust the length of the telescopic body by adjusting the current of the coil, thereby adjusting the length of the rope body; The door opening and closing device further includes: an adjusting module, which is electrically connected to the magnetostrictive assembly to adjust the current of the coil, and the adjusting module is used to receive and / or determine the opening and closing signal of the door body.

2. The door opening and closing device according to claim 1, characterized in that: The telescopic body is a magnetorheological elastomer, and the coil is surrounded by the outside of the magnetorheological elastomer.

3. The door opening and closing device according to claim 2, characterized in that: The telescopic body comprises: a central section and connecting sections at two ends of the central section. The magneto-telescoping assembly further comprises a sleeve sleeved outside the central section, and the coil is arranged in the sleeve.

4. The door opening and closing device according to claim 3, characterized in that: The connecting section includes a connecting piece, and the magnetostrictive assembly further includes: clamping pieces located on both sides of the connecting piece, the clamping pieces on both sides are connected to clamp the connecting piece, and the rest of the rope body is connected to the clamping pieces.

5. The door opening and closing device according to claim 4, characterized in that: The magnetostrictive assembly further includes a fixing wire, the two ends of the fixing wire are respectively a first end and a second end, the rest of the rope body is connected to the first end of the fixing wire, and the second end of the fixing wire is connected to the clamping piece; The clamping sheets at both sides of the connecting sheet are respectively provided with fixing holes, and the second end of the fixing line is provided with a fixing column, and the fixing column is inserted into the fixing holes of the two clamping sheets at the same time.

6. The door opening and closing device according to any one of claims 2 to 5, characterized in that: The magnetostrictive assembly further comprises permanent magnets disposed at both ends of the telescopic body.

7. The door opening and closing device according to claim 6, characterized in that: The magnetostrictive assembly further includes: a magnetostrictive mounting sheet, wherein there are two magnetostrictive mounting sheets, and the two magnetostrictive mounting sheets are respectively connected to two ends of the telescopic body in the length direction, and the permanent magnet is arranged on the magnetostrictive mounting sheets.

8. The door opening and closing device according to any one of claims 1 to 5, characterized in that: The adjustment module further includes: a sensor, which is an angle sensor or a distance sensor, for detecting an opening angle of the door body relative to the machine body; Or the adjustment module further includes: a first adjustment member, a second adjustment member and a resistance detection member, one of the first adjustment member and the second adjustment member is suitable for being arranged on the machine body, and the other is suitable for being connected to the door body, the first adjustment member is provided with a resistor and a sliding piece sliding on the resistor, the second adjustment member is connected to the sliding piece, and the resistance detection member is used to detect the resistance value of the first adjustment member; Alternatively, the regulating module further includes: a current detecting element, which is used to detect instantaneous current changes of the coil to sense the switch state of the door body.

9. The door opening and closing device according to any one of claims 1 to 5, characterized in that: At least one section of the rope body is a spring.

10. A dishwasher, characterized in that: include: A machine body, wherein a rotating shaft is arranged on the machine body; A door body, the lower end of which is connected to the rotating shaft; A door opening and closing device, wherein the door opening and closing device is the door opening and closing device according to any one of claims 1 to 9, wherein the two ends of the rope body are respectively connected to the machine body and the door body, and the connection point between the rope body and the door body is spaced apart from the rotating shaft.

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