CN116624053A - Door opening and closing device and electrical equipment - Google Patents

Abstract

The application belongs to the technical field of electric appliances, and particularly relates to a door opening and closing device and electric equipment. The door opening and closing device includes: a top door mechanism and a revolving door mechanism driven by the same driving mechanism; the top door mechanism is rotationally arranged on the base, and comprises a driving part connected with the driving mechanism and a top door part used for pushing the door body, and the driving mechanism is started so as to drive the top door mechanism to rotate relative to the base through the driving part to drive the top door part to push the door body. The door opening and closing device and the electrical equipment provided by the application can improve the push-pull effect in the door rotating process.

Description

Door opening and closing device and electrical equipment

Technical Field

The application belongs to the technical field of electric appliances, and particularly relates to a door opening and closing device and electric equipment.

Background

With the improvement of living standard, electrical equipment such as refrigerators, dish washers, disinfection cabinets and the like are widely penetrated into the lives of people. In order to maintain the sealing performance of the above electrical equipment, an adsorption structure is generally provided between the case and the door body or to maintain the internal and external negative pressure, and the door body is stably fixed to the case. Although the related performance of the electrical equipment is improved, the difficulty of opening the door body is also improved to a certain extent, and the door body can be pulled open by usually needing larger force, so that the door body is inconvenient to use; especially for the old, children, patient etc. crowd, not only the operation degree of difficulty is big, still has certain security risk.

Disclosure of Invention

In order to solve the technical problems, the application provides a door opening and closing device and electrical equipment, and aims to improve the convenience and safety of opening of a door body of the electrical equipment to a certain extent.

The technical scheme of the application is as follows:

in one aspect, an embodiment of the present application provides a door opening and closing device, including: a top door mechanism and a revolving door mechanism driven by the same driving mechanism;

the top door mechanism is rotationally arranged on the base, and comprises a driving part connected with the driving mechanism and a top door part used for pushing the door body, and the driving mechanism is started so as to drive the top door mechanism to rotate relative to the base through the driving part to drive the top door part to push the door body.

In some embodiments, the drive mechanism includes a linkage gear, the top door mechanism and the swing door mechanism are both connected to the linkage gear, and the drive portion includes a first tooth portion that meshes with the linkage gear.

In some embodiments, the top door mechanism further comprises:

the limiting piece is arranged on the base, and the door pushing mechanism is abutted against the limiting piece when rotating to a preset angle relative to the base.

In some embodiments, the top door mechanism further comprises:

and the two ends of the tensioning piece are respectively connected with the top door mechanism and the base to maintain the top door mechanism at the preset angle.

In some embodiments, the top door mechanism is in the shape of a cam, and the drive portion and the top door portion are located on a rim of the cam.

In some embodiments, the top door portion is provided with a shock absorbing wear member for contact with the door body.

In some embodiments, the top door mechanism is in a sector shape, the vertex of the sector is rotatably arranged on the base, and the driving part and the top door are respectively positioned at two ends of an arc of the sector.

In some embodiments, the top door mechanism is provided with a stiffener.

In some embodiments, the linkage gear further comprises:

the body is rotatably arranged on the base;

the first pushing part is arranged on the body and pushes the revolving door mechanism to rotate when the body rotates forwards so as to open the door body;

the second pushing part is arranged on the body and drives the revolving door mechanism to rotate when the body reversely rotates so as to close the door body.

In some embodiments, the swing door apparatus rotates a first angle between the first pushing portion and the second pushing portion, and the body is rotatably disposed on the base coaxially with the swing door apparatus.

In some embodiments, the body is provided with a rotation limiting groove, the body and the revolving door mechanism are coaxially and rotatably arranged on the base, the revolving door mechanism can rotate in the rotation limiting groove, and the first pushing part and the second pushing part are groove walls of the rotation limiting groove in the radial direction of the linkage gear.

In some embodiments, the door rotating mechanism includes a driving member and a door rotating member, one end of the door rotating member is rotatably disposed at a hinge point C of the door body, the other end of the door rotating member is rotatably connected with one end of the driving member at a hinge point a, the other end of the driving member is rotatably disposed at a hinge point D of the base, and the driving mechanism may drive the driving member to rotate so as to drive the door rotating member to push the door body;

the hinge point A and the rotation center B of the door body are respectively located at two sides of a connecting line of the hinge point C and the hinge point D.

In some embodiments, the hinge point a, the hinge point C, the rotation center B, and the hinge point D are sequentially connected to form a parallelogram.

On the other hand, the embodiment of the application also provides an electrical device, which comprises a box body, a door body rotationally arranged on the box body and the door opening and closing device, wherein the base is arranged on the box body.

In some embodiments, the electrical device is one of a refrigerator, a sterilizer, a dishwasher.

The beneficial effects of the application at least comprise:

according to the door opening and closing device and the electrical equipment, the door opening and closing mechanism and the door rotating mechanism driven by the driving mechanism respectively realize automatic door opening operation and door rotating operation, so that convenience and safety of door opening operation are improved. The door body can be pushed by the door pushing mechanism, and the door body is pushed to a set angle by breaking through the door opening resistance by the accumulated force, so that the door opening difficulty is reduced; the swing door operation can be implemented under the condition that the swing door resistance is greatly reduced through the swing door mechanism at a set angle, and the automatic door opening speed is improved. Specifically, the door pushing mechanism arranged on the base can be rotated, the lever principle is utilized, pushing efficiency in the door rotating stage is greatly improved under pushing of the driving mechanism, and door opening efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a door opening and closing device according to an embodiment of the present application;

FIG. 2 is a schematic view of a linkage gear of the door opening and closing device in FIG. 1;

FIG. 3 is a schematic view of a top door mechanism of the door opening and closing device of FIG. 1;

FIG. 4 is a schematic view of a door rotating mechanism of the door opening and closing device in FIG. 1;

fig. 5 is a schematic diagram showing a standby state of the door opening and closing device in fig. 1;

FIG. 6 is a schematic view of a top door state of the door opening and closing device of FIG. 1;

FIG. 7 is a schematic view showing a door opening and closing state of the door opening and closing device in FIG. 1;

FIG. 8 is a schematic view of the door opening and closing device of FIG. 1;

FIG. 9 is a schematic view showing a door closing state of the door opening and closing device in FIG. 1;

FIG. 10 is a schematic view of a door opening and closing mechanism of the door opening and closing device of FIG. 1 in a reset state;

fig. 11 is a schematic view of a door rotating mechanism arrangement of the door opening and closing device of fig. 1.

In the accompanying drawings:

100-driving mechanism, 110-driver, 120-linkage gear, 121-third tooth part, 1221-second tooth part, 123-rotation limit groove, 1231-first pushing part, 1232-second pushing part;

revolving door mechanism 200, 210-driver, 214-pivot shaft, 220-revolving door;

300-top door mechanism, 370-elastic limiting piece, 380-top door type piece, 381-first tooth part, 382-top door part, 383-reinforcing rib, 384-pivot shaft;

600-base, 630-limiting piece;

910-box, 920-door.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The application is described below with reference to specific embodiments in conjunction with the accompanying drawings.

The embodiment provides a door opening and closing device, aims at improving the efficiency and convenience of door opening and closing operation to a certain extent, and solves the problem that the initial stage of manually opening a refrigerator door is large in resistance, the subsequent stage rotates too fast, and the door opening and closing process is not smooth to a certain extent.

The door opening and closing device according to the present embodiment is used for being assembled to an electric apparatus equipped with a door body that can be opened and closed in a deflected manner, and the door body is driven to be opened and closed by the action of the door opening and closing device. The equipment can be electric equipment such as a refrigerator, a sterilizing cabinet, a dish washer and the like.

Referring to fig. 5, in particular, the electrical apparatus includes a case 910 and a door 920 rotatably provided on the case 910, a pickup opening is provided on the case 910, and the door 920 is operated to rotate on the case 910 to close or open the pickup opening of the case 910.

Referring to fig. 1 and 5, in some embodiments, the door opening and closing device may include: a drive mechanism 100, a swing door mechanism 200, and a door top mechanism 300. Wherein, the driving mechanism 100 outputs driving force, and can drive the revolving door mechanism 200 and the top door mechanism 300 to implement the whole-course revolving operation and the initial top door operation of the door body 920; that is, the swing door apparatus 200 and the top door apparatus 300 of the present embodiment are driven by the driving mechanism 100.

Referring to fig. 1, in some embodiments, to meet assembly accuracy requirements, or to achieve efficient assembly, a separate base 600 may be provided on the housing 910 for carrying the drive mechanism 100, swing door mechanism 200, and door top mechanism 300 described above; therefore, the driving mechanism 100, the revolving door mechanism 200 and the top door mechanism 300 can be assembled on the base 600, and then the base 600 is integrally assembled on the box 910, so that the standardized installation of the base 600 on electrical equipment is realized, the placement stability of the base 600 is ensured, and meanwhile, the matching precision and reliability can be ensured; on the other hand, when the integrated assembly is integrally assembled on electric equipment such as a refrigerator, the integrated assembly can be efficiently and reliably carried out.

In this embodiment, the base 600 is a separate component disposed within the housing 910; in other embodiments, the base 600 may be part of the housing 910 and formed on the housing 910 instead of a separate component.

In some embodiments, the driving mechanism 100 outputs a driving force to drive the swing door mechanism 200 and the top door mechanism 300 to rotate relative to the base 600, respectively, thereby rotating the door 920 and pushing the door 920. For example: when the door is automatically opened, the door body 920 is pushed by driving the door pushing mechanism 300 until the adsorption acting force of the door body is burst, the door body 920 is pushed to open a certain angle, and then the door body 920 is continuously rotated by the door rotating mechanism 200, so that the coordinated, stable, smooth and efficient automatic door opening operation can be realized; when the door is closed, the door rotating mechanism 200 is driven by the driving mechanism 100 to pull the door 920 to deflect towards the box 910 until the door is closed, and the driving mechanism 100 simultaneously drives the top door mechanism 300 to reset.

It is worth to say that, under the condition that the output power is unchanged, the output power is inversely proportional to the speed; therefore, under the condition of keeping the driving power unchanged, a larger pushing force channel can be obtained at a lower door body deflection speed in the door pushing stage, so that the door opening body 920 can be quickly and reliably pushed by the door pushing mechanism 300, and after the door rotating mechanism 200 is put into operation, a higher door rotating speed can be obtained under the condition of keeping a smaller door rotating force channel due to small rotating resistance, thereby quickly completing door rotating operation and realizing door opening in place.

In some embodiments, the swing door apparatus 200 or the top door apparatus 300 may be configured to cooperate with the driving apparatus 100, respectively, for implementing a door opening/closing swing door structure scheme or a door opening/top door structure scheme, respectively.

In some embodiments, the door pushing mechanism 300 cooperates with the driving mechanism 100 to break the adsorption resistance, negative pressure, etc. of the door 920 and the case 910, so as to push the door 920 open to a predetermined angle, so as to facilitate the subsequent automatic or manual door opening operation.

Referring to fig. 1 and 3, in some embodiments, the door pushing mechanism 300 is rotatably disposed on the base 600, and can rotate relative to the base 600 under the driving of the driving mechanism 100 to push the door 920.

In some embodiments, the top door mechanism 300 may be configured as a top door 380, and correspondingly, a driving portion connected to the driving mechanism 100 and a top door 382 for matching the profile of the door body 910 are provided on the top door 380.

In some embodiments, a pivot shaft 384 may be provided to effect a pivotal connection of top gate 380 with base 600.

In some embodiments, the driving portion of top gate 380 is configured as a first tooth 381 that forms a geared connection with driving mechanism 100. The drive mechanism 100 achieves rotational drive of the top gate 380 by the first tooth 381.

Referring to fig. 5 and 7, in some embodiments, a limiting member 630 is provided on the base 600 for limiting the rotation track of the door mechanism 300. Thus, the top door 300 may be abutted against the stopper 630 when rotated to a predetermined angle, preventing further deflection thereof, and stably controlling the positional accuracy thereof.

In some embodiments, the tightening member 370 may be connected between the base 600 and the top door 380, and the top door 380 may be tightened on the limiting member 630 to maintain a predetermined angle, i.e. controlled at a set position of the base 600, to limit unnecessary shaking, and ensure the reliability of the engagement.

Referring to fig. 3, in some embodiments, top gate 380 may be provided as a cam-shaped structure and top gate 382 and first teeth 381 may be provided on the rim of the cam.

In some embodiments, to reduce overhead door wear, a shock absorbing wear member may be provided on the overhead door 382.

Referring to fig. 3, in order to simplify the structure of the top door type member 380, reduce the space occupation requirement and maintain the structural strength, the top door type member 380 may be integrally configured as a substantially fan-shaped structural member, the pivot shaft is rotatably disposed in the apex region of the fan shape, and the top door 382 and the first tooth 381 are disposed at two ends of the arc-shaped segment of the fan shape, so that the pushing force arm of the top door 382 is substantially equivalent to the driving force arm of the first tooth 381, thereby ensuring that the pushed speed of the top door type member 380 is substantially equivalent to the speed of the pushing door body, and ensuring the stability and efficiency of the pushing operation. In other embodiments, the top gate 382 need not be disposed on an arcuate segment of a sector, for example, may be closer to a sector setpoint region relative to the first tooth 381, such that the top gate velocity is higher than the push rate of 381, thereby enabling rapid accumulation of force to break through door opening resistance during top gate operation.

In some embodiments, to increase structural strength, reinforcing ribs 383 may be provided on top door form 380.

Referring to fig. 1 and 2, in some embodiments, the drive mechanism 100 includes a linkage gear 120 rotatably disposed on the base 600, the linkage gear 120 being operable as an output of the drive mechanism 100 for driving the swing gate mechanism 200 and the top gate 380. In other embodiments, the driving mechanism 100 further includes a driver 110 disposed on the base 600, and connected to the linkage gear 120 through a connection or a transmission member, to output driving force.

In some embodiments, the driver 110 may be configured as a reduction motor, or a motor configured with a reduction gearbox, so that the output torque and rotational speed can be reasonably controlled.

Referring to fig. 1 and 4, in some embodiments, the swing door apparatus 200 is configured as a driver 210 and a swing door 220, and a first end of the driver 210 is rotatably disposed on a base 600, a second end of the driver 210 is hinged to a first end of the swing door 220 by a hinge shaft 214, and a second end of the swing door 220 is hinged to a door body 920. The driver mechanism 100 drives the driving piece 210 to rotate, and then the pushing and pulling revolving door piece 220 acts to realize door opening and closing revolving door operation.

Referring to fig. 1 and 2, the linkage gear 120 is used as a component of the direct drive driver 210 and the door lifter mechanism 300 in a manner that satisfies both the operational modes of the deflectable swing door mechanism 200 and the door lifter mechanism 300. The body of the linkage gear 120 may be configured as a rotating member on the base 600, and a third tooth portion 121 engaged with the upstream driver 110 is provided, and the top door mechanism 300 and the swing door mechanism 200 are driven by rotating the output torque. In order to meet the driving requirement of the driver 210, a first pushing part 1231 and a second pushing part 1232 may be disposed on the body relatively, and a space enough to accommodate the driver 210 is left between the two parts, so that in an actual assembly state, the driver 210 can be pushed to rotate from two sides of the driver 210 through the first pushing part 1231 and the second pushing part 1232, and when the body of the linkage gear 120 rotates in the forward direction and the reverse direction, the driver 210 is pushed to rotate in two opposite directions, so as to drive the revolving door 220 to push or pull the door 920, thereby realizing door opening and closing operations.

Referring to fig. 2, 6, 7, 8, and 9, in some embodiments, the second pushing portion 1232 may be configured as a door-opening pushing portion, and the first pushing portion 1231 may be configured as a door-closing pushing portion; that is, when the linkage gear 120 rotates in the forward direction, the driving member 210 is pushed to the door 920 by the second pushing part 1232 to push the revolving door 220 to push the door 920 to open the door; when the linkage gear 120 rotates reversely, the driving member 210 is pushed away from the door 920 by the first pushing portion 1231 to push the door rotating member 220 to pull the door 920 to close the door.

In some embodiments, in order to satisfy the timing control of the top door operation and then the revolving door operation during the door opening process, the distance between the first pushing part 1231 and the second pushing part 1232 may be matched, so that a certain deflection space is reserved, when the driver 210 deflects relative to the body, the first pushing part 1231 rotates to the second pushing part 1232 to rotate by a first angle, so that a time difference exists between the deflection of the linkage gear 120 and the push deflection of the driver 210 by setting the initial position of the driver 210, and thus, during the door opening process, when the linkage gear 120 rotates and drives the top door mechanism 300 to implement the top door operation, the revolving door mechanism 200 does not implement the active revolving door operation at the same time, but delays for a certain period of time, and the revolving door mechanism 200 implements the active revolving door operation under the drive of the linkage gear 120; therefore, after the door is pushed by the door pushing mechanism 300 with large force, the door is quickly rotated by the door rotating mechanism, so that the labor is reasonably divided, the compression on the structure for executing the door rotating function is reduced, and the reliability is ensured.

In some embodiments, the initial position of the driver 210 may be set to abut against the first pushing portion 1231, so that, after the linkage gear 120 starts to rotate in the door opening process, the driver 210 gradually approaches the second pushing portion 1232 from the first pushing portion 1231, so that the time for the second pushing portion 1232 to push the driver 210 can be accurately controlled, and the revolving door mechanism 200 and the top door mechanism 300 can be seamlessly engaged, so that the door can be smoothly opened, and poor fit defects such as jamming, vibration, etc. can be avoided.

The deflection angle of the driving member 210 can be matched according to the design opening of the door 920 to meet the revolving door requirement, and the first angle is correspondingly controlled. The value of the first angle is also related to the initial position, the length, etc. of the driving member 210, and can be configured according to the actual assembly condition.

Referring to fig. 5, in some embodiments, in order to improve the rotation control accuracy and reliability of the driver 210, the body and the first end of the driver 210 may be coaxially and rotatably disposed on the base 600, so that the angle control of the driver 210 can be achieved by controlling the rotation angle of the body, thereby greatly improving convenience.

Referring to fig. 7 and 8, in some embodiments, to drive the door mechanism 300, a third pushing portion is disposed on the body of the linkage gear 120, and is used to connect and drive the door mechanism 300. In the door opening operation, the body of the linkage gear 120 rotates in the forward direction and drives the door top mechanism 300 to push the door body 920. In contrast, when the door is closed, the body of the linkage gear 120 rotates reversely to drive the door lifting mechanism 300 to reset.

In some embodiments, the door pushing operation only needs to break the door opening resistance between the door 920 and the case 910, which is mainly the adsorption force, so as to push the door 920 open by a smaller angle, and for this reason, the pushing stroke of the door pushing mechanism 300 is also smaller; correspondingly, the stroke and time of the linkage gear 120 connection and the pushing of the door pushing mechanism 300 can be set to be only relatively short, that is, after the door rotating mechanism 200 actively rotates, the door pushing mechanism 300 can be disconnected from the linkage gear 120 or separated after being kept for a relatively short period of time, so that the structure linkage state in the working state is simplified, and mutual interference is avoided.

Referring to fig. 8, in order to improve the accuracy and reliability of time control of connection and disconnection, a first tooth 381 may be provided on the top door mechanism 300, and a second tooth 1221 engaged with the first tooth 381 is provided on the third pushing portion, so that the pushing stroke can be stably driven in a manner of engaged transmission, and meanwhile, the pushing stroke can be adjusted by controlling the length and number of teeth of the engaged tooth. During the door opening process, the linkage gear 120 rotates forward, that is, the door pushing mechanism 300 is driven by the meshing transmission mode to push the door body 920 until the meshing state is released, and the door pushing mechanism 300 is not stressed any more; during the door closing process, the linkage gear 120 reversely rotates, and when the linkage gear rotates to a set angle, the meshing connection of the first tooth part 381 and the second tooth part 1221 is reestablished, and the back door pushing mechanism 300 moves along the opposite door pushing direction under the drive of the linkage gear 120 until the back door pushing mechanism resets.

In some embodiments, top door travel control of top door mechanism 300 may be implemented based on deflection control of entrainer 210. Specifically, the angle by which the link gear 120 rotates in the period in which the first tooth 381 and the second tooth 1221 start to mesh to separate may be set to the second angle. Considering that the first angle is an angle in which the body of the linkage gear 120 rotates with respect to the driver 210 when the body starts rotating, i.e., a time period in which the swing door mechanism 200 implements the swing door is delayed when the body starts rotating, the first angle may be controlled to be equal to or smaller than the second angle, i.e., the engagement time period is controlled based on this, thereby controlling the length of the engagement tooth portion.

In some embodiments, to ensure the smoothness of the engagement of the top door and the swing door, the difference between the first angle and the second angle may be controlled to be within 1 degree. That is, when the driver 210 abuts against the second pushing portion 1232, the first tooth 381 and the second tooth 1221 still maintain a small meshed state, or maintain the last meshed tooth pair, or may be in a synchronous disconnected pushing state.

Referring to fig. 2, in some embodiments, in order to smoothly control the deflection posture of the driver 210, a rotation limiting groove 123 may be formed on the body of the linkage gear 120, and the body of the linkage gear 120 and the driver 210 may be kept coaxially and rotatably disposed on the base 600, and the coaxial shaft 211 may be disposed in the rotation limiting groove 123, and the driver 210 may be rotatably disposed in the rotation limiting groove 123, and the first pushing portion 1231 and the second pushing portion 1232 may be disposed as groove walls of the rotation limiting groove 123 in the radial direction of the linkage gear 120, that is, as fan-like grooves. The driving piece 210 is accommodated by the rotation limiting groove 123, the overall assembly height is reduced, meanwhile, the sinking groove structure can also effectively protect the impact resistance and vibration performance of the pushing area of the driving piece 210, and the reliability of the structure is guaranteed.

In some embodiments, in order to improve the stability and in-place reliability of the function of the linkage gear 120, a third stop member and a fourth stop member may be disposed on the base 600 and respectively disposed at two ends of the rotation track of the linkage gear 120, to prevent excessive rotation thereof, and to ensure in-place precision of forward rotation and reverse rotation. The third stopper stops the rotation of the linkage gear 120 when the door 920 is closed, and the fourth stopper stops the rotation of the linkage gear 120 when the door is opened to the limit position.

In some embodiments, the rotation limit angle of the linkage gear 120 may be determined according to the design opening of the door 920, and the rotation angle of the linkage gear 120 between the third stopper and the fourth stopper may be set to 130 degrees or more and 90 degrees; may be set to 120 degrees or other specific degrees.

Referring to fig. 1, in some embodiments, in order to ensure the swing door efficiency and structural stability of the swing door mechanism 200, the relative deflection state and extension length of the driving member 210 and the swing door 220 for the door opening and the swing door speed may be combined with the rotation center point B of the door 920 of the electrical apparatus and the arrangement position of the base 600 to plan the swing door mechanism 200 and the hinge point C of the door 920 thereof. Specifically, the hinge point C of one end of the revolving door 220 and the door body 920 is designed to be in a distributed state, namely, the hinge point a and the rotation center B are respectively located at two sides of the connection line of the hinge point C and the hinge point D, so as to form a convex quadrangle, and the problem that the revolving door 220 is not stressed in an extreme state due to the fact that the revolving door 220 is not stressed in the rotating process, the door body 920 cannot be rotated, and the problem that the opening range of the door body 920 is limited is avoided.

In some embodiments, in order to exert the openable angle of the door 920 and the structure of the case 910 to the maximum extent, without being excessively limited by the revolving door mechanism 200, the position of the hinging point C of the door 920 at one end of the revolving door 220, the position of the hinging point D of the base 600 at the other end of the driving member 210, and the lengths of the hinging points of the driving member 210 and the revolving door 220 may be set according to the principle that the hinging point a, the hinging point C, the rotation center B, and the hinging point D are sequentially connected to form a parallelogram; in this state, the opening degree of the door 920 can approach 180 degrees, excluding the structural members such as the structural width and thickness and the hinge. Of course, the larger the door 920 of the refrigerator is, the better the door is, but the larger the door is, and the larger the door is, according to multiple factors such as installation working conditions, use requirements, convenience and the like. In other embodiments, through the arrangement manner, the opening degree of the door body can be stably and reliably realized at 130 degrees.

The present embodiment also provides a refrigerator, which includes a case 910 and a door 920, wherein the door 910 is rotatably disposed on the case 910. And a door opening and closing device is connected between the case 910 and the door 920, so as to push or deflect the door 920 relative to the case 910, thereby realizing door opening and closing operation.

In some embodiments, the door opening and closing device is provided with a base 600 fixed on the case 910, and directs or props the top door 380 against the door 920, and the revolving door 220 is hinged to the door 920 through a hinge base. In other embodiments, the base may be an integrated molded structure formed on top of the housing 910, assuming the function of the base. In still other embodiments, the base 600 may be disposed on the door 920, and the top door 380 may be directed toward or abut against the case 910, and the revolving door 220 may be hinged to the case 910 by a hinge base.

In some embodiments, the refrigerator is provided with a plurality of door bodies 920, and an independent door opening and closing device can be arranged corresponding to each door body 920, so that the automatic door opening and closing function of the multi-door refrigerator is realized.

Referring to fig. 6, 7 and 8, when the door opening operation is performed, the linkage gear 120 rotates forward, the door pushing mechanism 300 is driven to directly push the door 920, when the linkage gear 120 rotates a certain angle, the continued pushing force reaches a critical value breaking through the door opening resistance, the door is pushed open and maintained at a certain angle, and as the linkage gear 120 continues to rotate forward, the first tooth 381 and the second tooth 1221 are in a disengaged state, and the door pushing mechanism 300 is tensioned on the first stop 630 under the action of the elastic limiting member 370; in this process, the driver 210 of the revolving door mechanism 200 approaches from the first pushing portion 1231 to the second pushing portion 1232, and can continue to rotate forward along with the linkage gear 120 until the driver 210 abuts against the second pushing portion 1232, so as to push the door 920 until reaching the set limit position, thereby realizing the door opening revolving door operation.

Referring to fig. 9 and 10, when the door closing operation is performed, the linkage gear 120 is reversed, and when the first pushing part 1231 is pushed against the driver 210, the reverse rotation is continued, and the driver 210 is pushed to be reversed, the door pushing mechanism 300 and the door 920 are pulled to rotate toward the case 910 until the case 910 is closed, so that the door closing operation is achieved; in the process, the linkage gear 120 rotates to a certain angle position, and is engaged with the first tooth portion 381 through the second tooth portion 1221, so as to drive the top door mechanism 300 to rotate reversely until reaching the initial position.

The beneficial effects of the application at least comprise:

according to the door opening and closing device and the electrical equipment, the door opening and closing mechanism and the door rotating mechanism driven by the driving mechanism respectively realize automatic door opening operation and door rotating operation, so that convenience and safety of door opening operation are improved. The door body can be pushed by the door pushing mechanism, and the door body is pushed to a set angle by breaking through the door opening resistance by the accumulated force, so that the door opening difficulty is reduced; the swing door operation can be implemented under the condition that the swing door resistance is greatly reduced through the swing door mechanism at a set angle, and the automatic door opening speed is improved. Specifically, the door pushing mechanism arranged on the base can be rotated, the lever principle is utilized, pushing efficiency in the door rotating stage is greatly improved under pushing of the driving mechanism, and door opening efficiency is improved. And through arranging the gesture of driving piece and revolving door piece to with hinge point A and rotation center B be located the line both sides of hinge point C and hinge point D respectively, form a protruding quadrangle, avoid driving piece 210 and revolving door piece 220 to form the deflection that exceeds 180 degrees in the rotation process, avoid revolving door piece 220 not atress's extreme state, unable rotation door body 920, and limit the problem of the aperture scope of contracting door body 920, very big assurance revolving door operation's efficiency and reliability.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

In the description of the present application, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (15)

1. A door opening and closing device, comprising: a top door mechanism and a revolving door mechanism driven by the same driving mechanism;

the top door mechanism is rotationally arranged on the base, and comprises a driving part connected with the driving mechanism and a top door part used for pushing the door body, and the driving mechanism is started so as to drive the top door mechanism to rotate relative to the base through the driving part to drive the top door part to push the door body.

2. The door opening and closing device as claimed in claim 1, wherein the driving mechanism includes a linkage gear, the top door mechanism and the swing door mechanism are both connected to the linkage gear, and the driving part includes a first tooth part engaged with the linkage gear.

3. The door opening and closing device as claimed in claim 1, wherein the top door mechanism further comprises:

the limiting piece is arranged on the base, and the door pushing mechanism is abutted against the limiting piece when rotating to a preset angle relative to the base.

4. A door opening and closing device as claimed in claim 3, wherein the top door mechanism further comprises:

and the two ends of the tensioning piece are respectively connected with the top door mechanism and the base to maintain the top door mechanism at the preset angle.

5. The door opening and closing device as claimed in claim 1, wherein the top door mechanism is in the shape of a cam, and the driving part and the top door part are located on a rim of the cam.

6. The door opening and closing device according to claim 5, wherein the top door portion is provided with a shock absorbing wear member for contact with the door body.

7. The door opening and closing device as claimed in claim 1, wherein the top door mechanism has a fan shape, the apex of the fan shape is rotatably provided on the base, and the driving part and the top door are respectively located at both ends of an arc of the fan shape.

8. Door opening and closing device according to claim 5 or 7, wherein the top door means is provided with a reinforcement bar.

9. The door opening and closing device as claimed in claim 2, wherein the linkage gear further comprises:

the body is rotatably arranged on the base;

the first pushing part is arranged on the body and pushes the revolving door mechanism to rotate when the body rotates forwards so as to open the door body;

the second pushing part is arranged on the body and drives the revolving door mechanism to rotate when the body reversely rotates so as to close the door body.

10. The door opening and closing device as claimed in claim 9, wherein the swing door mechanism is rotated between the first pushing portion and the second pushing portion by a first angle, and the body is rotatably provided on the base coaxially with the swing door mechanism.

11. The door opening and closing device according to claim 9, wherein a rotation limiting groove is formed in the body, the body and the door rotating mechanism are coaxially and rotatably arranged on the base, the door rotating mechanism can rotate in the rotation limiting groove, and the first pushing portion and the second pushing portion are groove walls of the rotation limiting groove in the radial direction of the linkage gear.

12. The door opening and closing device according to any one of claims 1 to 7, wherein the door rotating mechanism comprises a driving member and a door rotating member, one end of the door rotating member is rotatably arranged at a hinge point C of the door body, the other end of the door rotating member is rotatably connected with one end of the driving member at a hinge point a, the other end of the driving member is rotatably arranged at a hinge point D of the base, and the driving mechanism can drive the driving member to rotate so as to drive the door rotating member to push the door body;

the hinge point A and the rotation center B of the door body are respectively located at two sides of a connecting line of the hinge point C and the hinge point D.

13. The door opening and closing device as claimed in claim 12, wherein the hinge point a, the hinge point C, the rotation center B, and the hinge point D are sequentially connected to form a parallelogram of four sides.

14. An electrical apparatus comprising a housing, a door rotatably disposed on the housing, and a door opening and closing device according to any one of claims 1 to 13, wherein the base is disposed on the housing.

15. The appliance of claim 14, wherein the appliance is one of a refrigerator, a sterilizer, a dishwasher.