Door opening and closing device, opening and closing method and washing machine

Abstract

The invention relates to the technical field of washing machines, in particular to a door opening and closing device, an opening and closing method and a washing machine, and aims to solve the problem that an existing roller washing machine adopts a side door opening mode, needs a large door opening space and is inconvenient for a user to use. In order to achieve the purpose, the door opening and closing device comprises a box body, a door module, a door lock module, a hinge base and an elastic supporting piece. A pick-and-place opening is formed in the side wall of the box body, and the door module opens or closes the pick-and-place opening in a translation mode; the elastic supporting piece is hinged to the lower portion of the door module in a rotation angle limiting mode and supports the lower portion of the door module. In the closed state, the lower portion of the door module is hinged to the hinge base under the compression elastic force effect of the elastic supporting piece. In the open state, the elastic supporting piece stretches and drives the door module to horizontally move to the open position in the stretching direction. By adopting a translation opening or closing mode, the door opening space of the door module can be reduced, and a user can use the door module conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of washing machines, and in particular provides a door opening and closing device, an opening and closing method and a washing machine. Background Art

[0002] Currently, most drum washing machines have side-opening doors, and a folding door structure cannot be designed. The side-opening door requires a larger door opening space when turning to open it, which is very inconvenient when taking and putting clothes in a narrow aisle. The user needs to move position and move clothes during the turning process to provide space for opening the door.

[0003] In view of the above problems in the prior art, those skilled in the art are in urgent need of a door opening and closing device, an opening and closing method and a washing machine. Summary of the invention

[0004] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing drum washing machine adopts a side-opening door mode and requires a larger door opening space, which causes inconvenience to users.

[0005] In a first aspect, the present invention provides a door opening and closing device, comprising a box body and a door module, wherein a side wall of the box body is provided with a take-in and put-out opening; further comprising a door lock module, a hinge seat and an elastic support member, wherein the elastic support member is hingedly connected to and supports the lower portion of the door module in a manner of limiting the rotation angle; the door module opens or closes the take-in and put-out opening in a translational manner; in a closed state, the upper portion of the door module is locked to the door lock module, and the lower portion of the door module is hinged to the hinge seat under the action of the compressive elastic force of the elastic support member; in an open state, the upper portion of the door module is unlocked from the door lock module, and the lower portion of the door module is separated from the hinge seat; the elastic support member extends and drives the door module to translate along the extension direction to an open position.

[0006] When adopting the above technical solution, the present invention adopts a translational manner to realize the opening or closing of the door module. Specifically, when closing, the door module can be fixed to the box body and achieve a good sealing connection through the connection with the hinge seat and the door lock module. At this time, the elastic support member is in a compressed state and generates a compressive elastic force on the door module. This compressive elastic force makes the lower part of the door module have a contact force with the hinge seat to achieve hinged connection; when opening, the door module can be disconnected from the hinge seat and the door lock module, and the elastic support member in the compressed state rebounds and stretches, driving the door module to translate along the extension direction to the highest point position and fully open. Therefore, the door module of the present invention adopts a translational manner to open or close the access port, which can reduce the door opening space, facilitate user use, and significantly improve the user experience.

[0007] Furthermore, the door lock module is located at a position on the side wall of the box body corresponding to above the access port, and the door lock module is used to lock or unlock the upper part of the door module; the hinge seat is located at a position on the side wall of the box body corresponding to below the access port; and the hinge seat is used to be hinged to the lower part of the door module in a detachable manner.

[0008] Furthermore, the hinge seat includes a suspension seat body and a receiving groove, the suspension seat body protrudes outward from the side wall of the box body, and one end away from the box body is bent downward; the receiving groove with an opening facing downward is defined between the suspension seat body and the side wall of the box body.

[0009] Furthermore, a support rod is provided at the lower portion of the door module, and the support rod is hinged to the accommodating groove in a detachable manner; in a closed state, the support rod and the accommodating groove are hinged in a snap-fitting manner under the action of the compressive elastic force of the elastic support member; in an open state, the support rod is separated from the accommodating groove.

[0010] Under the condition of adopting the above-mentioned technical scheme, the present invention provides a specific structure for connecting the hinge seat and the door module. With this structure, the support rod at the lower part of the door module is buckled into the receiving groove from bottom to top under the action of the compressive elastic force of the elastic support member to realize hinge connection; and by pressing the door module downward, the elastic support member contracts to separate the support rod from the receiving groove, thereby realizing the detachable hinge connection between the hinge seat and the door module.

[0011] Furthermore, the accommodating groove is provided with a guide structure, and the support rod can be buckled into the accommodating groove along the guide structure under the action of the compressive elastic force of the elastic support member; or, the support rod can be separated from the accommodating groove along the guide structure.

[0012] When adopting the above-mentioned technical solution, the present invention facilitates the hinge connection between the support rod and the receiving groove through the guide structure, and by pressing the door module, the support rod can be separated from the receiving groove along the guide structure and gradually move away from the box body and the hinge seat along the guide structure. Then, when the door module is no longer pressed, the elastic support member can directly drive the door module to translate to the open position in the inclined upward direction to avoid interference.

[0013] Further, the elastic support member can stretch in an inclined upward direction away from the box body; or the elastic support member can be compressed and contracted in an inclined downward direction close to the box body; the elastic support member is a damping telescopic rod, at least a portion of which is installed inside the box body, and it has a telescopic end; the telescopic end of the damping telescopic rod passes through the box body in an inclined upward direction and is hinged to the lower part of the door module.

[0014] When the above technical solution is adopted, the elastic support member of the present invention is extended and retracted in an inclined upward or downward manner, which can avoid interference between the door module and the box body or the hinge seat during the extension and retraction process; and a specific structure of the elastic support member is provided, which uses a damping telescopic rod to drive the door module to move horizontally along the extension direction to open or close.

[0015] Furthermore, a support hinge is provided at the lower portion of the door module, the telescopic end of the damping telescopic rod is hingedly supported by the support hinge, and the support hinge has a limiting structure for limiting the rotation angle.

[0016] When the above technical solution is adopted, the support hinge and the damping telescopic rod are hinged, so that the door module can be locked or unlocked with the door lock module at the rotation center of the hinge seat. By limiting the rotation angle of the support hinge and the damping telescopic rod, the door module can be prevented from tipping over during the translational opening and closing process.

[0017] Furthermore, the damping telescopic rod has a three-stage telescopic structure, and the elastic supporting force of the damping telescopic rod is greater than the gravity of the door module; the damping telescopic rod can rotate within a certain range in a vertical plane perpendicular to the access opening.

[0018] When adopting the above technical solution, the present invention provides a specific structure of a damping telescopic rod; in different states corresponding to opening or closing, the damping telescopic rod can swing within a certain range, so that the door module can be separated or hinged from the hinge seat, and the damping telescopic rod can be tilted and extended after rotating to a certain angle to avoid interference between the door module and the box body or the hinge seat.

[0019] In a second aspect, the present invention further provides an opening and closing method using the above-mentioned door opening and closing device, comprising the following steps:

[0020] Step S1, when the door module is opened, unlock the upper part of the door module and the door lock module; Step S2, press the door module downward to separate the lower part of the door module from the hinge seat; Step S3, the elastic support member extends and supports the door module to translate to the open position along the extension direction; Step S4, when the door module is closed, press the door module in the open state downward and compress the elastic support member in the extended state at the same time; Step S5, hinge the lower part of the door module and the hinge seat under the compression elastic force of the elastic support member; Step S6, lock the upper part of the door module with the door lock module, and the door module is in the closed state.

[0021] In a third aspect, the present invention further provides a washing machine, which uses the above-mentioned door opening and closing device, or uses the above-mentioned door opening and closing method.

[0022] When the above technical solution is adopted, the beneficial effects of the present invention are:

[0023] (1) The door opening and closing device of the present invention retains the door lock module and the hinge seat. By connecting the door lock module and the hinge seat, the door module can be fixed on the box body in the closed state. The door glass of the door module and the window gasket rubber sealing ring of the box body are in close contact to ensure the sealing of the whole machine, and no water leakage will occur during washing.

[0024] (2) The hinge seat of the door opening and closing device of the present invention is a semi-open hook-shaped structure, and the door module can be separated from the hinge seat when it is needed to be opened, so that the door module can be opened in a translational manner; specifically, in the closed state, the elastic force of the damping telescopic rod can push the support rod of the door module into the receiving groove of the hinge seat to achieve hinge connection, and when it is needed to be opened, by pressing the door module downward, the damping telescopic rod in the compressed state continues to be compressed to the lowest stroke, thereby achieving the separation of the door module from the hinge seat;

[0025] (3) The door opening and closing device of the present invention realizes the translation opening or closing of the door module through the damping telescopic rod. The damping telescopic rod has a three-stage telescopic stroke. When the damping telescopic rod is retracted to the lowest stroke, the door module is fixed to the box body through the hinge seat and the door lock module to realize closing; when the three-stage telescopic structure of the damping telescopic rod is extended to the highest stroke, the door module is in the fully open position at the highest point, the inner barrel is fully open, and the user can put in and take out clothes;

[0026] (4) The damping telescopic rod of the present invention extends in an upward direction or contracts in a downward direction, and in different states corresponding to opening or closing, the damping telescopic rod can swing within a certain range, thereby avoiding interference between the door module and the box body or the hinge seat;

[0027] (5) The support hinge on the door module of the present invention has only a certain rotation angle, which ensures that the door module maintains a certain position in the closed state, the open state and the process of closing and opening the door and does not fall backwards;

[0028] (6) The elastic force of the damping telescopic rod of the present invention is slightly higher than the weight of the door module, so that in a free state, the damping telescopic rod will slowly pop out and lift the door module to the highest position; or the user can manually pull the door module to the open position with the auxiliary support of the damping telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a schematic structural diagram of the door opening and closing device of the present invention in a closed state;

[0031] Figure 2is a schematic structural diagram of the door opening and closing device of the present invention in a semi-open state;

[0032] Figure 3 It is a structural schematic diagram of the opening and closing door device of the present invention in a fully opened state.

[0033] Reference numerals list :

[0034] 1-box; 2-door module; 3-hinge seat; 4-damping telescopic rod; 5-door lock module; 11-hanging spring; 12-driving motor; 13-outer cylinder; 14-water pump; 15-inner cylinder; 16-shock absorber; 17-main control board; 21-support rod; 22-support hinge; 23-door glass. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention but not to limit the scope of the present invention.

[0036] like Figures 1 to 3 As shown, the embodiment of the present invention discloses a door opening and closing device. In order to clearly see the structure of the door module 2 and the box body 1 in the open or closed state, one side shell of the box body 1 is removed; Figure 1 The upper part of the middle door module 2 is locked with the door lock module 5, and the lower part of the door module 2 is hinged with the hinge seat 3, and the door module 2 is in a position to close the clothing access opening of the box body 1; Figure 2 After the middle door module 2 is unlocked from the door lock module 5 and separated from the hinge seat 3, the door module 2 is supported by the damping telescopic rod 4 and is in a semi-open state when the damping telescopic rod 4 is extended; Figure 3 The damping telescopic rod 4 in the door module is extended to the highest stroke, and the door module 2 is in a fully open state.

[0037] Continue reading Figures 1 to 3 The side wall of the drum washing machine box 1 is provided with a clothing access opening, and the side wall of the box 1 is provided with a door lock module 5 at a position above the corresponding clothing access opening, and a hinge seat 3 is provided at a position below the corresponding clothing access opening; the door module 2 as a whole corresponds to the position of the clothing access opening and opens or closes the clothing access opening, and the upper part of the door module 2 facing the clothing access opening corresponds to the door lock module 5 and can be locked or unlocked, and the lower part of the door module 2 facing the clothing access opening corresponds to the hinge seat 3, and the hinge seat 3 is a semi-open hook structure, so that the lower part of the door module 2 can be hinged or separated from the hinge seat 3; at the same time, an elastic support member is installed inside the box 1, specifically a damping telescopic rod 4, one end of the damping telescopic rod 4 is hinged to the inner bottom wall of the box 1, and the telescopic end of the other end thereof passes through the side wall of the box 1 and is hinged to the lower part of the door module 2 in a manner of limiting the rotation angle.

[0038] like Figure 1As shown, in the closed state, the upper part of the door module 2 is locked with the door lock module 5, and the lower part of the door module 2 is hinged with the hinge seat 3. At this time, the damping telescopic rod 4 is in a compressed state, and its compression elastic force provides support for the hinge of the door module 2 and the hinge seat 3, so that there is a certain contact force between the door module 2 and the hinge seat 3; in this closed state, the door module 2 can be fixed on the box body 1, and the door glass 23 of the door module 2 is in close contact with the window gasket rubber sealing ring to ensure the sealing of the whole machine, and no water leakage will occur during washing.

[0039] like Figure 2 and Figure 3 As shown, when opening, the upper part of the door module 2 is unlocked from the door lock module 5. The unlocking process here is to apply force to the door module 2 with the hinge seat 3 as the rotation center to open the door lock module 5; press the door module 2 downward so that the damping telescopic rod 4 continues to be compressed downward to the lowest stroke, so that the door module 2 is separated from the hinge seat 3; then the damping telescopic rod 4 in the compressed state gradually rebounds and stretches, and drives the door module 2 to move horizontally and open. Figure 3 The door module 2 is in a fully opened position, and the clothing access opening is fully opened, so that the user can access the clothing easily.

[0040] As a preferred embodiment of the present invention, the hinge seat 3 includes a suspension seat body and a receiving groove, wherein the suspension seat body protrudes and extends outward from the side wall of the box body 1, and the end of the suspension seat body away from the box body 1 is bent downward, that is, there is a certain distance between the extended end of the suspension seat body and the side wall of the box body 1, so that a receiving groove with an opening downward is defined between the suspension seat body and the side wall of the box body 1, and then the lower part of the door module 2 is hinged to the receiving groove of the hinge seat 3 in a detachable manner.

[0041] Those skilled in the art can understand that, the hinge seat 3 of the present invention can be integrally formed with the side wall of the box body 1, that is, it protrudes and extends outward from the side wall of the box body 1; the hinge seat 3 can also be fixedly connected to the box body 1 by fasteners; and the accommodating groove can be jointly defined by the hinge seat 3 and the side wall of the box body 1, or only a accommodating groove with an opening facing downward is formed on the hinge seat 3; and in order to facilitate the detachable connection between the door module 2 and the accommodating groove of the hinge seat 3, the accommodating groove can be provided with an inclined guide structure, and the lower part of the door module 2 is buckled into the accommodating groove through the inclined guide structure. When the door module 2 is separated from the hinge seat 3, by pressing the door module 2 downward, the damping telescopic rod 4 contracts downward, and the lower end of the door module 2 slides out of the accommodating groove along the outward inclined guide portion, thereby realizing the separation of the door module 2 from the hinge seat 3.

[0042] As a preferred embodiment of the present invention, a support rod 21 is provided at the lower portion of the door module 2, and the support rod 21 is adapted to the receiving groove of the hinge seat 3. The damping telescopic rod 4 can push the support rod 21 of the door module 2 into the receiving groove, and by pressing the door module 2, the support rod 21 can be separated from the receiving groove.

[0043] As a preferred embodiment of the present invention, the accommodating groove is provided with a guide structure, and the support rod 21 can be buckled into the accommodating groove along the guide structure under the action of the compressive elastic force of the elastic support member; or, the support rod 21 can be separated from the accommodating groove along the guide structure and gradually move away from the hinge seat 3.

[0044] Correspondingly, the rotation of the damping telescopic rod 4 can be achieved by pressing the door module 2, so that the support rod at the bottom of the door module 2 slides out along the guide structure that is inclined outward along the accommodating groove, so that the damping telescopic rod 4 rotates; or the user can apply outward force to the door module 2 to rotate the damping telescopic rod 4, and the damping telescopic rod 4 can naturally extend after rotation.

[0045] As a preferred embodiment of the present invention, when the door module 2 needs to be opened, the elastic support member can be extended in an inclined upward direction away from the box body 1; when the door module 2 needs to be closed, the elastic support member can be compressed and contracted in an inclined downward direction close to the box body 1. It should be understood here that the elastic support member extends to the highest stroke in the inclined upward direction and its telescopic end or the door module 2 gradually moves away from the box body 1 during the extension process; the elastic support member contracts to the lowest stroke in the inclined downward direction and its telescopic end or the door module 2 gradually moves closer to the box body 1 during the contraction process.

[0046] like Figure 1 As shown, in the closed state, the angle between the telescopic axis of the damping telescopic rod 4 and the vertical direction is α; Figure 3 As shown, in the fully open state, the angle between the telescopic axis of the damping telescopic rod 4 and the vertical direction is β; the door module 2 of the present invention translates in an oblique upward direction to an open position, or translates in an oblique downward direction to a closed position, thereby avoiding interference between the door module 2 during the translation opening or closing process.

[0047] like Figure 2 As shown, the door module 2 has a door glass 23 that is recessed inwardly, and the bottom end of the recessed direction of the door glass 23 is tilted to avoid interference between the door glass 23 and the box body 1 during the opening or closing process of the door module 2. Those skilled in the art can specifically set the tilt angle of the recessed bottom end of the door glass 23 as long as the door glass 23 does not interfere with the box body 1.

[0048] As a preferred embodiment of the present invention, the elastic support member is a damping telescopic rod 4, at least a portion of which is installed inside the box body 1, and it has a telescopic end; the telescopic end penetrates the box body 1 in an inclined upward direction and is hinged to the lower part of the door module 2.

[0049] As a preferred embodiment of the present invention, a support hinge 22 is provided at the lower portion of the door module 2, and the support hinge 22 is used to support and hinge with the telescopic end of the damping telescopic rod 4 in a manner of limiting the rotation angle, and the support hinge 22 has a limiting structure for limiting the rotation angle.

[0050] It should be noted that the present invention uses a support hinge 22 with a limiting structure to limit the rotation angle, so as to avoid tipping over during the process of translational opening or closing of the door module 2; and limiting the rotation angle of the door module 2 and the damping telescopic rod 4 can ensure that during the opening or closing process, the door module 2 and the box body 1 will not interfere with each other, that is, the rotation angle of the door module 2 and the damping telescopic rod 4 is not easy to be too large; at the same time, it should not be too small, so as to ensure that the door module 2 can rotate with the hinge seat 3 as the rotation center to a position locked with the door lock module 5.

[0051] As a preferred embodiment of the present invention, support parts are provided at both ends of the lower part of the door module 2, both ends of the support rod 21 are respectively connected to the support parts, and support hinges 22 are also provided on the support parts.

[0052] As a preferred embodiment of the present invention, the elastic force of the damping telescopic rod 4 of the present invention is slightly greater than the gravity of the door module 2, so that the damping telescopic rod 4 can drive the door module 2 to translate to a fully open position; the damping telescopic rod 4 has a three-stage telescopic structure, and during the opening process, the three-stage telescopic structure of the damping telescopic rod 4 gradually extends to the highest stroke; during the closing process, the three-stage telescopic structure of the damping telescopic rod 4 gradually shrinks to the lowest stroke. Those skilled in the art can specifically set the telescopic structure of the damping telescopic rod 4, for example, the damping telescopic rod 4 can also adopt a two-stage or four-stage telescopic structure, as long as the damping telescopic rod 4 can drive the door module 2 to translate to a fully open position.

[0053] As a preferred embodiment of the present invention, the damping telescopic rod 4 can rotate within a certain range in a vertical plane perpendicular to the access opening.

[0054] It should be noted that one end of the damping telescopic rod 4 is hinged to the inner bottom wall of the box body 1 to achieve rotation; Figure 3 The angle β is greater than Figure 1 In the angle α, during the opening process of the door module 2, the damping telescopic rod 4 rotates a small angle in the direction away from the access opening of the box body 1, which can avoid the interference effect of the hinge seat 3 on the extension of the damping telescopic rod 4.

[0055] As a preferred embodiment of the present invention, the door lock module 5 of the present invention includes a door hook, and the upper part of the door module 2 can be locked or unlocked with the door hook; in specific operation, force is applied to the upper end of the door module 2, and the door module 2 rotates around the hinge seat 3, and the door lock module 5 can be opened; similarly, the door module 2 can be rotated around the hinge seat 5 to a position where it is locked with the door hook of the door lock module 5. It can be understood that those skilled in the art can also use door lock modules 5 with other structures, as long as the door lock module 5 can lock or unlock the door module 2.

[0056] The embodiment of the present invention further discloses a door opening and closing method using the above-mentioned door opening device, comprising the following steps:

[0057] Step S1, when the door module 2 needs to be opened, first release the lock of the door lock module 5 on the upper part of the door module 2;

[0058] Step S2, pressing the door module 2 downward to separate the lower part of the door module 2 from the hinge seat 3;

[0059] Step S3, the elastic support member extends and supports the door module 2 to move in a translational direction to an open position;

[0060] Step S4, when the door module 2 needs to be closed, firstly press the door module 2 in the open state downward, and at the same time compress the elastic support member in the extended state;

[0061] Step S5, hinge the lower part of the door module 2 and the hinge seat 3 under the compressive elastic force of the elastic support member;

[0062] Step S6, locking the upper part of the door module 2 with the door lock module 5, and the door module 2 is in a closed state.

[0063] As a preferred embodiment of the present invention, the step S3 of "the elastic support member extends and supports the door module 2 to move to the open position along the extension direction" specifically includes:

[0064] The elastic support member in the compressed state naturally stretches to the highest stroke in the inclined upward direction gradually away from the box body 1, and supports and drives the door module 2 to translate and open in the inclined upward direction.

[0065] As a preferred embodiment of the present invention, the "simultaneously compressing the elastic support member in the extended state" in step S4 specifically includes:

[0066] The elastic supporting member in the extended state is compressed and contracted in an inclined downward direction gradually approaching the box body 1 .

[0067] As a preferred embodiment of the present invention, the step S5 of "hinging the lower part of the door module 2 and the hinge seat 3 under the compressive elastic force of the elastic support member" specifically includes:

[0068] The elastic support is compressed to the lowest stroke, the lower part of the door module 2 corresponds to the hinge seat 3, and the lower part of the door module 2 is buckled into the receiving groove of the hinge seat 3 under the compression elastic force of the elastic support to be hinged.

[0069] The embodiment of the present invention further discloses a washing machine, which adopts the above-mentioned door opening and closing device, or adopts the opening and closing method of the above-mentioned door opening and closing device.

[0070] like Figure 1 As shown, the washing machine of the present invention is specifically a drum washing machine, in which an inner drum 15 and an outer drum 13 are installed in a casing 1, the top end of the outer drum 13 is connected to the inner top wall of the casing 1 through a hanging spring 11, the bottom end of the outer drum 13 is connected to a shock absorber 16, and the water in the outer drum is discharged by a water pump 14; the inner drum 15 is connected to a driving motor 12 for rotation; a main control panel 17 is also provided at the top of the casing 1.

[0071] It should be noted that the above implementation mode is only used to illustrate the principles of the present invention and is not intended to limit the scope of protection of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the above method so that the present invention can be applied to more specific application scenarios.

[0072] For example, in an alternative embodiment, the damping telescopic rod 4 of the present invention can be installed in the box body 1, and a mounting structure for accommodating the damping telescopic rod 4 can be separately provided, and the mounting structure can be connected to the box body 1.

[0073] For example, in an alternative embodiment, the lock between the door lock module 5 and the door module 2 of the present invention can also be achieved by magnetic attraction, and the main control board 17 automatically controls the attraction or release state of the door lock module 5 and the door module 2.

[0074] For example, in an alternative embodiment, a snap-fit ​​connection can be adopted between the lower portion of the door module 2 of the present invention and the hinge seat 3; accordingly, the lower portion of the door module 2 and the hinge seat 3 are respectively provided with matching snap-fit ​​and slot structures.

[0075] For example, in an alternative embodiment, those skilled in the art may also adopt elastic support members of other structures, as long as the elastic support members can achieve the effect of supporting the door module 2 and driving the door module 2 to move horizontally to open or close.

[0076] For example, in an alternative embodiment, the door opening and closing device of the present invention can also be used in other washing equipment, such as a dryer, a washer-dryer, etc.

[0077] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A door opening and closing device, comprising a box body (1) and a door module (2), wherein a side wall of the box body (1) is provided with a take-in and put-out opening, characterized in that: It also comprises a door lock module (5), a hinge seat (3) and an elastic support member, wherein the elastic support member is hingedly connected to and supports the lower part of the door module (2) in a manner of limiting the rotation angle; the door module (2) opens or closes the access opening in a translational manner; In a closed state, the upper part of the door module (2) is locked with the door lock module (5), and the lower part of the door module (2) is hinged with the hinge seat (3) under the action of the compression elastic force of the elastic support member; In the open state, the upper part of the door module (2) is unlocked from the door lock module (5), and the lower part of the door module (2) is separated from the hinge seat (3); the elastic support member stretches and drives the door module (2) to move in a horizontal direction to the open position.

2. The door opening and closing device according to claim 1, characterized in that: The door lock module (5) is located on the side wall of the box (1) at a position above the access opening, and the door lock module (5) is used to lock or unlock the upper part of the door module (2); The hinge seat (3) is located at a position below the access opening on the side wall of the box body (1); and the hinge seat (3) is used to be hinged to the lower part of the door module (2) in a detachable manner.

3. The door opening and closing device according to claim 2, characterized in that: The hinge seat (3) comprises a suspension seat body and a receiving groove, wherein the suspension seat body protrudes outwardly from the side wall of the box body (1), and one end thereof away from the box body (1) is bent downward; the receiving groove with an opening facing downward is defined between the suspension seat body and the side wall of the box body (1).

4. The door opening and closing device according to claim 3, characterized in that: A support rod (21) is provided at the lower part of the door module (2), and the support rod (21) is used to be hinged to the receiving groove in a detachable manner; In a closed state, the support rod (21) and the accommodating groove are hingedly engaged under the action of the compressive elastic force of the elastic support member; in an open state, the support rod (21) and the accommodating groove are separated.

5. The door opening and closing device according to claim 4, characterized in that: The accommodating groove is provided with a guide structure, and the support rod (21) can be buckled into the accommodating groove along the guide structure under the action of the compressive elastic force of the elastic support member; or, the support rod (21) can be separated from the accommodating groove along the guide structure.

6. The door opening and closing device according to claim 1, characterized in that: The elastic support member can be stretched in an inclined upward direction away from the box body (1); or the elastic support member can be compressed and contracted in an inclined downward direction close to the box body (1); The elastic support member is a damping telescopic rod (4), at least a portion of which is installed inside the box body (1), and has a telescopic end; the telescopic end penetrates the box body (1) in an inclined upward direction and is hinged to the lower part of the door module (2).

7. The door opening and closing device according to claim 6, characterized in that: A support hinge (22) is provided at the lower part of the door module (2), the telescopic end of the damping telescopic rod (4) is supported and hinged to the support hinge (22), and the support hinge (22) has a limiting structure for limiting the rotation angle.

8. The door opening and closing device according to claim 6, characterized in that: The damping telescopic rod (4) has a three-stage telescopic structure, and the elastic supporting force of the damping telescopic rod (4) is greater than the gravity of the door module (2); the damping telescopic rod (4) can rotate within a certain range in a vertical plane perpendicular to the access opening.

9. A method for opening and closing a door using the door opening and closing device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: Step S1, when the door module (2) is opened, unlocking the upper part of the door module (2) and the door lock module (5); Step S2, pressing the door module (2) downward to separate the lower part of the door module (2) from the hinge seat (3); Step S3, the elastic support member extends and supports and drives the door module (2) to move in a translational manner along the extension direction to an open position; Step S4, when the door module (2) is closed, pressing the door module (2) in the open state downwards, and compressing the elastic support member in the extended state at the same time; Step S5, hinge the lower part of the door module (2) and the hinge seat (3) under the action of the compressive elastic force of the elastic support member; Step S6, locking the upper part of the door module (2) with the door lock module (5), at which time the door module (2) is in a closed state.

10. A washing machine, characterized in that: A door opening and closing device according to any one of claims 1 to 8, or an opening and closing method of a door opening and closing device according to claim 9.

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