Door opening device and refrigerator

Abstract

The door opening device is applied to electrical equipment, the electrical equipment comprises a door body, the door opening device comprises a shell, a motor support, a motor and a pushing piece, the shell is provided with a containing cavity, the motor support is arranged on the shell, the motor is contained in the containing cavity, the motor comprises an output shaft and a motor body connected with the output shaft, and the pushing piece is arranged on the motor body. The motor body is arranged on the motor support so that the motor body can be suspended in the containing cavity, the pushing piece is in driving connection with the output shaft, and the pushing piece is used for pushing the door body. According to the technical scheme, when the motor operates, the resonance strength of the motor and the shell is reduced, so that noise generated by the door opening device is reduced, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a door opening device and a refrigerator. Background Art

[0002] Refrigerators, microwave ovens, ovens and other electrical appliances with door bodies are widely used in various fields. In order to achieve better working effects, better sealing effects are usually required. For this reason, sealing structures are usually provided between the door body and the main body of the electrical equipment, such as sealing strips, magnetic structures, etc., to maintain the sealing performance of the contact between the door body and the main body of the electrical equipment and the stability in the sealed state. However, this also increases the difficulty of opening the door to a certain extent, making the door opening operation inconvenient and causing inconvenience in the door opening operation. In order to facilitate the opening of the door body, a door opening device can be provided on the main body. The door opening device drives the push piece through the motor to push open the door body, so that the door body breaks through the door sealing force.

[0003] However, the current door opening device includes a shell and a motor directly connected to the inner wall of the shell. When the motor is running, the motor and the shell will strongly resonate, causing the door opening device to emit a large noise, thereby reducing the user experience. Utility Model Content

[0004] The main purpose of the utility model is to provide a door opening device, which aims to reduce the intensity of the resonance between the motor and the housing when the motor is running, thereby reducing the noise emitted by the door opening device and improving the user experience.

[0005] To achieve the above-mentioned purpose, the door opening device proposed by the utility model is applied to an electrical device, wherein the electrical device comprises a door body, and the door opening device comprises:

[0006] A shell having a receiving cavity;

[0007] A motor bracket, arranged on the housing;

[0008] a motor, which is received in the receiving cavity, wherein the motor comprises an output shaft and a motor body connected to the output shaft, wherein the motor body is arranged on the motor bracket so that the motor body is suspended in the receiving cavity; and

[0009] A pushing member is drivingly connected to the output shaft, and the pushing member is used to push open the door body.

[0010] Optionally, the motor body has a first end for the output shaft to pass through, and the motor body is connected to the motor bracket through the first end.

[0011] Optionally, the door opening device also includes a retaining structure, and the retaining structure and the motor bracket limit a grease retaining cavity for accommodating grease. The output shaft is provided with output teeth, and the output shaft is driven and connected to the push member via the output teeth, and the output teeth are provided in the grease retaining cavity.

[0012] Optionally, the inner wall surface of the grease retaining cavity has a first wall surface provided on the retaining structure and a second wall surface provided on the motor bracket, and the first wall surface and / or the second wall surface are provided in an arc surface around the output shaft.

[0013] Optionally, the retaining structure is integrally formed with the housing;

[0014] Alternatively, the retaining structure is configured as a separate component, and the retaining structure is detachably connected to the motor bracket.

[0015] Optionally, the door opening device includes a gear mechanism, and the output tooth drives the pushing member through the gear mechanism.

[0016] Optionally, the gear mechanism comprises a first gear having a maximum rotation speed greater than a preset rotation speed, and the housing is provided with a first rotating shaft for rotationally connecting the first gear;

[0017] The first rotating shaft is configured as a ceramic shaft or a steel shaft; or, the first gear is rotatably connected to the first rotating shaft via a bearing.

[0018] Optionally, the housing includes a bottom shell and an upper shell disposed above the bottom shell, the bottom shell and the upper shell define the receiving cavity, and the gear mechanism includes a plurality of gears rotatably connected to the bottom shell;

[0019] And / or, the output tooth is configured as a worm, the gear mechanism includes a turbine connected to the worm, the turbine is rotatably disposed on the motor bracket, and the motor bracket is detachably connected to the housing.

[0020] Optionally, the door opening device also includes a first position switch connected to the motor, and the shell has an initial position and a first pushing position for the pushing member to pass along the pushing direction of the pushing member. When the pushing member moves from the first pushing position to the initial position, the first position switch controls the motor to stop moving.

[0021] Optionally, the door opening device also includes a trigger tooth drivingly connected to the output shaft, the trigger tooth having a first trigger portion and a plurality of tooth portions for engaging with the pushing member, when the pushing member moves along the pushing direction, the pushing member sequentially engages with the plurality of tooth portions whose rotating shaft distances from the trigger tooth gradually increase, and the first trigger portion is used to press the first position switch so that the first position switch controls the motor to stop moving.

[0022] Optionally, the housing is provided with a first limiting portion, and the pushing member is provided with a first elastic portion, and when the pushing member is located at the initial position, the first limiting portion abuts against the first elastic portion to prevent the first triggering portion from crushing the first position switch;

[0023] And / or, the shell is provided with a first rigid part, and the pushing member is provided with a second rigid part for abutting the first rigid part to prevent the first trigger part from crushing the first position switch, and when the pushing member moves from the initial position toward a first direction opposite to the pushing direction, the second rigid part approaches the first rigid part.

[0024] Optionally, the door opening device also includes a second position switch connected to the motor, and the shell has an initial position and a first pushing position for the pushing member to pass along the pushing direction of the pushing member. When the pushing member reaches the first pushing position, the second position switch controls the motor to drive the pushing member to reset to the initial position.

[0025] Optionally, the pushing member is provided with a second triggering portion, and the second triggering portion is used to press the second position switch so that the second position switch controls the motor to drive the pushing member to reset to the initial position.

[0026] Optionally, the housing is provided with a second limiting portion, and the pushing member is provided with a second elastic portion, and when the pushing member is located at the pushing position, the second limiting portion abuts against the second elastic portion to prevent the second triggering portion from crushing the second position switch;

[0027] And / or, the shell is provided with a third rigid part, and the pushing member is provided with a fourth rigid part for abutting the third rigid part to prevent the second trigger part from crushing the second position switch, and when the pushing member moves from the first pushing position toward the pushing direction, the fourth rigid part approaches the third rigid part.

[0028] Optionally, the shell is provided with a guide rail, the pushing member is provided with a guide groove, the guide groove comprises a first section and a second section arranged sequentially in the pushing direction of the pushing member, the first section is slidably matched with the guide rail, and there is a spacing between the inner wall of the second section and the guide rail.

[0029] Optionally, two opposite inner side walls of the first section are provided with convex ribs abutting against the guide rail;

[0030] And / or, the shell includes a bottom shell and an upper shell arranged above the bottom shell, the bottom shell and the upper shell limit the accommodating cavity, the bottom shell is provided with a guide rail, the upper shell has a recessed portion recessed toward the bottom shell, and the recessed portion is arranged relative to the pushing member in the up and down directions to limit the pushing member from detaching from the guide rail in the upward direction.

[0031] The utility model also provides a refrigerator, wherein the electrical appliance comprises the aforementioned door opening device.

[0032] In the technical solution of the utility model, the door opening device is applied to an electrical device, and the electrical device includes a door body. In this way, the electrical device can open the door body through the door opening device. It should be pointed out that the electrical device can be configured as, but not limited to, a refrigerator, a microwave oven, an oven and other electrical devices, as long as the electrical device has a door body. The door opening device includes a housing, a motor bracket, a motor and a push piece. Among them, the housing has a receiving cavity. The motor bracket is arranged in the housing. The motor is accommodated in the receiving cavity, and the motor includes an output shaft and a motor body connected to the output shaft. The motor body is arranged in the motor bracket, and the motor bracket provides support for the motor body so that the motor body is suspended in the receiving cavity. In this way, the motor body will not be in direct contact with the housing, reducing the path of the vibration generated by the motor body from the solid to the housing, which makes it difficult for the motor body and the housing to resonate. In this way, when the motor is running, it is conducive to reducing the intensity of the resonance between the motor and the housing, thereby reducing the noise emitted by the door opening device, and thus improving the user experience. In addition, the push piece is connected to the output shaft driving, and the push piece is used to push the door body open. In this way, driven by the motor, the push member can open the door body, so that the door body breaks through the door sealing force, which is beneficial to saving the user's effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of an embodiment of the door opening device of the utility model, wherein the push member is located at the initial position;

[0035] Figure 2 It is a structural schematic diagram of an embodiment of the door opening device of the utility model, wherein the pushing member is located at a first pushing position;

[0036] Figure 3 for Figure 1 A top view of

[0037] Figure 4 for Figure 3 AA section view;

[0038] Figure 5 for Figure 4 The enlarged view of point D;

[0039] Figure 6 for Figure 3 BB cross-sectional view;

[0040] Figure 7 for Figure 6 The enlarged view of point E;

[0041] Figure 8 for Figure 3 CC section view;

[0042] Fig. 9 for Figure 8 The enlarged view of F;

[0043] Fig.10 for Figure 3 Schematic diagram of the structure in which the middle door device hides the upper shell;

[0044] Fig.11 for Fig.10 The enlarged view of G;

[0045] Fig.12 for Fig.10 Enlarged view of H;

[0046] Fig.13 for Fig.10 A magnified view of point I;

[0047] Fig.14 for Fig.10 A schematic diagram of a structure in which the push member is located at a first push position;

[0048] Fig.15 for Fig.14 The enlarged view of J;

[0049] Fig.16 for Fig.14 The enlarged view of K;

[0050] Fig.17 for Fig.10 A schematic diagram of the structure of the middle push member;

[0051] Fig.18 for Fig.17 Enlarged view of L in the middle;

[0052] Fig.19It is a partial structural schematic diagram of the door opening device in other embodiments;

[0053] Fig. 20 for Fig.19 Middle MM section view.

[0054] Description of Figure Numbers:

[0055]

[0056]

[0057] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, an indirect connection through an intermediate medium, or abutment, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0062] Refrigerators, microwave ovens, ovens and other electrical appliances with door bodies are widely used in various fields. In order to achieve better working effects, better sealing effects are usually required. For this reason, sealing structures are usually provided between the door body and the main body of the electrical equipment, such as sealing strips, magnetic structures, etc., to maintain the sealing performance of the contact between the door body and the main body of the electrical equipment and the stability in the sealed state. However, this also increases the difficulty of opening the door to a certain extent, making the door opening operation inconvenient and causing inconvenience in the door opening operation. In order to facilitate the opening of the door body, a door opening device can be provided on the main body. The door opening device drives the push piece through the motor to push open the door body, so that the door body breaks through the door sealing force.

[0063] However, the current door opening device includes a shell and a motor directly connected to the inner wall of the shell. When the motor is running, the motor and the shell will strongly resonate, causing the door opening device to emit a large noise, thereby reducing the user experience.

[0064] To this end, the utility model proposes a door opening device, which aims to reduce the intensity of the resonance between the motor and the housing when the motor is running, thereby reducing the noise emitted by the door opening device and improving the user experience.

[0065] Reference Figures 1 to 5 , Fig.10 as well as Fig.11In one embodiment of the utility model, the door opening device 100 is applied to an electrical device, and the electrical device includes a door body. In this way, the electrical device can open the door body through the door opening device 100. It should be pointed out that the electrical device can be configured as, but not limited to, a refrigerator, a microwave oven, an oven and other electrical devices, as long as the electrical device has a door body. The door opening device 100 includes a housing 200, a motor bracket 500, a motor 600 and a push piece 700. Among them, the housing 200 has a receiving cavity. The motor bracket 500 is arranged in the housing 200. The motor 600 is accommodated in the receiving cavity, and the motor 600 includes an output shaft 610, and a motor body 620 connected to the output shaft 610. The motor body 620 is arranged on the motor bracket 500, and the motor bracket 500 provides support for the motor body 620 so that the motor body 620 is suspended in the receiving cavity. In this way, the motor body 620 will not be in direct contact with the housing 200, reducing the path of the vibration generated by the motor body 620 from the solid to the housing 200, which makes it difficult for the motor body 620 and the housing 200 to resonate. In this way, when the motor 600 is running, it is helpful to reduce the intensity of the resonance between the motor 600 and the housing 200, thereby reducing the noise emitted by the door opening device 100, thereby improving the user experience. In addition, the push piece 700 is connected to the output shaft 610 for driving, and the push piece 700 is used to push the door body open. In this way, under the drive of the motor 600, the push piece 700 can open the door body, so that the door body breaks through the door sealing force, which is helpful to save the user's effort.

[0066] Optionally, in one embodiment, the motor body 620 has a first end 621 for the output shaft 610 to pass through, and the motor body 620 is connected to the motor bracket 500 through the first end 621. It can be understood that the motor body 620 has a first end 621 and a second end 622 in the axial direction of the output shaft 610. Among them, the first end 621 is for the output shaft 610 to pass through. The part of the motor body 620 that vibrates more strongly is usually located at the second end 622. In this way, the motor body 620 is connected to the motor bracket 500 through the first end 621, so that the transmission path of the vibration generated by the second end 622 to the housing 200 through the motor body 620 and the motor bracket 500 becomes longer. In this way, when the motor 600 is running, it is beneficial to reduce the intensity of the resonance between the motor 600 and the housing 200, thereby reducing the noise emitted by the door opening device 100, and thus improving the user experience. However, the present design is not limited to this. In other embodiments, the part where the motor body 620 is connected to the motor bracket 500 can also be selected according to actual conditions, and no limitation is made here.

[0067] Optionally, in one embodiment, the first end 621 is screwed to the motor bracket 500. In this way, the motor body 620 is connected to the motor bracket 500 more stably, which can prevent the output shaft 610 from deflecting when the motor 600 is running, and is conducive to reducing the probability of abnormal operation of the door opening device 100. However, the present design is not limited to this. In other embodiments, the first end 621 can also be connected to the motor bracket 500 by means of clamping, etc., which is not limited here, as long as the first end 621 is connected to the motor bracket 500 more stably.

[0068] Refer to Figure 6 and 7 Optionally, in one embodiment, the door opening device 100 further includes a retaining structure 800, and the retaining structure 800 and the motor bracket 500 limit a grease retaining cavity 820 for accommodating grease, and the output shaft 610 is provided with an output tooth 910, and the output shaft 610 is drivingly connected to the push member 700 through the output tooth 910, and the output tooth 910 is provided in the grease retaining cavity 820. In this way, when the output shaft 610 rotates, the output tooth 910 will be driven to rotate, and the output tooth 910 will be stained with grease in the grease retaining cavity 820 during the rotation process. In this way, the parts where the output teeth 910 and the output teeth 910 are meshed will run more smoothly at the meshing position, which on the one hand improves the transmission efficiency of the output teeth 910, and on the other hand helps to reduce the noise generated by the parts where the output teeth 910 and the output teeth 910 are meshed during operation, which helps to improve the user experience. In addition, since the output tooth 910 is a moving part, the grease in the grease retaining cavity 820 will be driven to move when the output tooth 910 moves. However, due to the action of the cavity wall of the grease retaining cavity 820, it is difficult for the grease to escape from the grease retaining cavity 820. This ensures that there is always more grease in the grease retaining cavity 820, so that the output tooth 910 is always lubricated.

[0069] Optionally, in one embodiment, the inner wall surface of the grease holding cavity 820 includes a first wall surface 810 provided on the holding structure 800 and a second wall surface 510 provided on the motor bracket 500, and the first wall surface 810 and the second wall surface 510 are provided in an arc surface around the output shaft 610. In this way, it is helpful to reduce the gap between the output tooth 910 and the inner circumference of the grease holding cavity 820. It can be understood that the grease adhered to the inner wall surface of the grease holding cavity 820 is difficult to be utilized. By reducing the gap between the output tooth 910 and the inner circumference of the grease holding cavity 820, the amount of grease that is difficult to utilize is reduced, thereby improving the utilization rate of the grease in the grease holding cavity 820. However, the present design is not limited to this. In other embodiments, the grease retaining cavity 820 has a first wall 810 provided on the retaining structure 800, and the first wall 810 is provided in an arc surface around the output shaft 610; or, the grease retaining cavity 820 has a second wall 510 provided on the motor bracket 500, and the second wall 510 is provided in an arc surface around the output shaft 610; or, the first wall 810 and the second wall 510 can be made into other shapes according to actual needs, which is not limited here.

[0070] Optionally, in one embodiment, the retaining structure 800 is integrally formed with the housing 200. This helps to reduce the steps of assembling the door opening device 100 and the time of assembling the door opening device 100. Further, in one embodiment, the housing 200 includes a bottom shell 300 and an upper shell 400 disposed above the bottom shell 300, the bottom shell 300 and the upper shell 400 define a receiving cavity, and the upper shell 400 and the retaining structure 800 are integrally formed.

[0071] Refer to Fig.19 and 20 However, the present design is not limited thereto. In other embodiments, the holding structure 800 is configured as a separate component, and the holding structure 800 is detachably connected to the motor bracket 500. In this way, it is helpful to reduce the manufacturing difficulty of the holding structure 800 and the housing 200.

[0072] Optionally, in one embodiment, the door opening device 100 includes a gear mechanism 911, and the output tooth 910 drives the push member 700 through the gear mechanism 911. It can be understood that the gear mechanism 911 serves as a transmission mechanism, and the output tooth 910 drives the push member 700 through the gear mechanism 911. However, the present design is not limited thereto, and in other embodiments, the output tooth 910 directly meshes with the push member 700.

[0073] The higher the gear speed, the less stable the gear runs, and the more likely the gear makes noise. For this reason, optionally, in one embodiment, the gear mechanism 911 includes a first gear with a maximum speed greater than a preset speed, and the housing 200 is provided with a first shaft for rotationally connecting the first gear, and the first gear is rotationally connected to the first shaft through a bearing. In this way, it is helpful to reduce the noise emitted by the first gear with a higher speed. However, the present design is not limited to this. In other embodiments, the gear mechanism 911 includes a first gear with a maximum speed greater than a preset speed, and the housing 200 is provided with a first shaft for rotationally connecting the first gear, and the first shaft is configured as a ceramic shaft or a steel shaft. In this way, it is helpful to reduce the noise emitted by the first gear with a higher speed.

[0074] There are many types of bearings that can be selected. Optionally, in one embodiment, the bearing is configured as a needle bearing. However, the present design is not limited thereto. In other embodiments, the bearing is configured as a ball bearing.

[0075] Optionally, in one embodiment, the preset speed is configured to be 150 r / min. However, the present design is not limited thereto, and in other embodiments, the preset speed can also be set according to actual needs.

[0076] Optionally, in one embodiment, the gear mechanism 911 is configured as a speed reduction mechanism. In this way, the motor 600 can achieve speed reduction and torque increase through the gear mechanism 911, thereby increasing the pushing force of the push member 700, so that the push member 700 can push the door open.

[0077] Optionally, in one embodiment, the gear mechanism 911 includes a second gear 912 meshing with the output tooth 910, a third gear 913 meshing with the second gear 912, a fourth gear 914 meshing with the third gear 913, a fifth gear 915 meshing with the fourth gear 914, and a sixth gear 916 meshing with the fifth gear 915, and the sixth gear 916 is drivingly connected to the push member 700. The number of teeth from the second gear 912 to the sixth gear 916 gradually increases, so that the motor 600 can achieve deceleration and torque increase through multiple gears. However, the present design is not limited to this. In other embodiments, the gear mechanism 911 may include more or fewer gears, and the number of the gear mechanism 911 may be set according to actual needs, which is not limited here.

[0078] Optionally, in one embodiment, the second gear 912, the third gear 913, and the fourth gear 914 are all configured as first gears. It can be understood that the rotation speeds of the second gear 912, the third transmission mechanism, and the fourth transmission mechanism meet the preset rotation speed.

[0079] Refer to Fig.12 , 14And 15, optionally, in one embodiment, the sixth gear 916 is provided with a trigger tooth 940 mentioned later, and the trigger tooth 940 moves with the second gear 912. The function of the trigger tooth 940 is mentioned later, and will not be described in detail here.

[0080] Optionally, in one embodiment, the housing 200 includes a bottom shell 300 and an upper shell 400 disposed above the bottom shell 300, the bottom shell 300 and the upper shell 400 define a receiving cavity, and the gear mechanism 911 includes a plurality of gears rotatably connected to the bottom shell 300. In this way, the gears can avoid being limited by the bottom shell 300 and the upper shell 400, which is conducive to reducing the difficulty of the manufacturing process of the door opening device 100. However, the present design is not limited thereto, and in other embodiments, the gear mechanism 911 includes a plurality of gears rotatably connected to the upper shell 400.

[0081] Since the output tooth 910 is directly arranged on the output shaft 610, the output tooth 910 has a high rotation speed. Once the assembly error between the parts meshing with the output tooth 910 and the output tooth 910 is large, this will cause the door opening device 100 to emit a large noise. For this reason, optionally, in one embodiment, the output tooth 910 is configured as a worm, and the gear mechanism 911 includes a turbine connected to the worm. In this way, it is beneficial for the output tooth 910 to achieve deceleration and torque increase for the push member 700. The turbine is rotatably arranged on the motor bracket 500, and the motor bracket 500 is detachably connected to the housing 200. In this way, the turbine and the motor 600 are both installed and positioned by the motor bracket 500, which can effectively reduce the assembly error, improve the meshing accuracy of the worm gear, and reduce the noise emitted by the door opening device 100. However, the present design is not limited to this. In other embodiments, the turbine is rotatably connected to the housing 200; or, the output tooth 910 is configured as a first helical gear, and the gear mechanism 911 includes a second helical gear meshing with the first helical gear.

[0082] Optionally, in one embodiment, the door opening device 100 further includes a first position switch 920 connected to the motor 600, and the housing 200 has an initial position and a first pushing position for the pushing member 700 to pass through along the pushing direction of the pushing member 700. When the pushing member 700 moves from the first pushing position to the initial position, the first position switch 920 controls the motor 600 to stop. In this way, the first position switch 920 controls the pushing member 700 by controlling the motor 600 to stop, which can reduce the noise generated when the pushing member 700 is reset to the initial position. However, the present design is not limited to this. In other embodiments, when the pushing member 700 reaches the first pushing position, the first position switch 920 controls the motor 600 to stop, and the door opening device 100 further includes a reset spring connecting the pushing member 700 and the housing 200, and the reset spring is used to reset the pushing member 700 to the initial position.

[0083] There are many ways for the first position switch 920 to detect the position of the push member 700. Optionally, in one embodiment, the door opening device 100 further includes a trigger tooth 940 that is drive-connected to the output shaft 610. The trigger tooth 940 has a first trigger portion 942 and a plurality of tooth portions 941 for engaging with the push member 700. When the push member 700 moves in the push direction, the push member 700 sequentially engages with the plurality of tooth portions 941 whose rotation axis distance with the trigger tooth 940 gradually increases. The first trigger portion 942 is used to press the first position switch 920 so that the first position switch controls the motor 600 to stop. In this way, the first position switch 920 is triggered by pressing other components. In addition, the trigger tooth 940 is not only used to directly drive the push member 700 to move, but is also reused to press the first position switch 920 to trigger the first position switch 920. This is conducive to the simplification of the structure of the door opening device 100. However, the present design is not limited thereto. In other embodiments, the first position switch 920 is configured as a first photoelectric detection switch for detecting the pushing member 700 .

[0084] Refer to Fig.13 If the pushing member 700 reaches the initial position from the first pushing position, once the motor 600 cannot be stopped, the pushing member 700 will continue to move in the first direction opposite to the pushing direction, which will cause the first triggering part 942 to exert too much pressure on the first position switch 920, and the first position switch 920 may be crushed. To this end, optionally, in one embodiment, the housing 200 is provided with a first limiting part 320, and the pushing member 700 is provided with a first elastic part 750. When the pushing member 700 is in the initial position, the first limiting part 320 abuts against the first elastic part 750 to prevent the first triggering part 942 from crushing the first position switch 920. In this way, when the push member 700 reaches the initial position, the first elastic part 750 abuts against the first limit part 320. Once the motor 600 cannot be stopped, the first elastic part 750 is compressed under the action of the first limit part 320, and the elastic potential energy of the first elastic part 750 gradually increases to prevent the push member 700 from continuing to move along the first direction, thereby reducing the possibility that the first trigger part 942 crushes the first position switch 920. In addition, under the elastic force of the first elastic part 750, the sound emitted by the first elastic part 750 when abutting against the first limit part 320 is small, which can prevent the switch device from generating large noise.

[0085] If the push member 700 reaches the initial position from the first push position, once the motor 600 cannot be stopped, the push member 700 will continue to move in the first direction opposite to the push direction, which will cause the first trigger part 942 to exert too much pressure on the first position switch 920, and the first position switch 920 may be crushed. Optionally, in one embodiment, the housing 200 is provided with a first rigid part 340, and the push member 700 is provided with a second rigid part 770 for abutting the first rigid part 340 to prevent the first trigger part 942 from crushing the first position switch 920. When the push member 700 moves from the initial position to the first direction opposite to the push direction, the second rigid part 770 approaches the first rigid part 340. In this way, when the push member 700 reaches the initial position, once the motor 600 cannot be stopped, the second rigid part 770 gradually approaches the first rigid part 340, so that the first rigid part 340 abuts against the second rigid part 770, thereby preventing the first trigger part 942 from crushing the first position switch 920. In addition, since both the first rigid portion 340 and the second rigid portion 770 are rigid, damage to both due to excessive force when the second rigid portion 770 abuts against the second rigid portion 770 can be reduced, thereby providing a safeguard to prevent the first trigger portion 942 from crushing the first position switch 920.

[0086] If the pushing member 700 reaches the initial position from the first pushing position, once the motor 600 cannot be stopped, the pushing member 700 will continue to move in the first direction opposite to the pushing direction, which will cause the first triggering part 942 to exert too much pressure on the first position switch 920, and the first position switch 920 may be crushed. To this end, optionally, in one embodiment, the housing 200 is provided with a first limiting part 320, and the pushing member 700 is provided with a first elastic part 750. When the pushing member 700 is in the initial position, the first limiting part 320 abuts against the first elastic part 750 to prevent the first triggering part 942 from crushing the first position switch 920. The housing 200 is provided with a first rigid part 340, and the pushing member 700 is provided with a second rigid part 770 for abutting against the first rigid part 340 to prevent the first triggering part 942 from crushing the first position switch 920. When the pushing member 700 moves from the initial position to the first direction opposite to the pushing direction, the second rigid part 770 approaches the first rigid part 340. In this way, the abutment time between the first elastic part 750 and the first limiting part 320 will be earlier than the abutment time between the first rigid part 340 and the second rigid part 770, that is, before the first rigid part 340 and the second rigid part 770 abut, when the pushing member 700 reaches the initial position, under the action of the first elastic part 750, the noise emitted by the door opening device 100 is relatively small. Once the motor 600 is out of control and the pushing member 700 moves from the initial position along the first direction, if the first elastic part 750 is damaged, the first rigid part 340 and the second rigid limiting part can still function. The first elastic part 750, the first limiting part 320, the first rigid part 340 and the second rigid part 770 jointly provide protection to prevent the first trigger part 942 from crushing the first position switch 920.

[0087] Optionally, in one embodiment, the first elastic portion 750 is configured as a spring. If the push member 700 is made of plastic, the push member 700 and the first elastic portion 750 can be integrally formed by injection molding. However, the present design is not limited thereto, and in other embodiments, the first elastic portion 750 is configured as a spring.

[0088] Refer to Fig.16Optionally, in one embodiment, the door opening device 100 further includes a second position switch 930 connected to the motor 600, and the housing 200 has an initial position and a first pushing position for the pushing member 700 to pass along the pushing direction of the pushing member 700. When the pushing member 700 reaches the first pushing position, the second position switch 930 controls the motor 600 to drive the pushing member 700 to reset to the initial position. In this way, the second position switch 930 controls the motor 600 to reset the pushing member 700 to the initial position, so that the pushing member 700 can move more smoothly and reduce the noise emitted when the pushing member 700 resets to the initial position. However, the present design is not limited to this. In other embodiments, when the pushing member 700 reaches the first pushing position, the second position switch 930 controls the motor 600 to stop the action, and the door opening device 100 further includes a reset spring connecting the pushing member 700 and the housing 200, and the reset spring is used to reset the pushing member 700 to the initial position.

[0089] There are many ways for the second position switch 930 to detect the position of the push member 700. Optionally, in one embodiment, the push member 700 is provided with a second trigger portion 790, and the second trigger portion 790 is used to press the second position switch 930, so that the second position switch 930 controls the motor 600 to drive the push member 700 to reset to the initial position. In this way, the second position switch 930 is triggered by the pressing of other components. However, the present design is not limited to this. In other embodiments, the first position switch 920 is configured as a first photoelectric detection switch for detecting the push member 700.

[0090] If the pushing member 700 reaches the first pushing position from the first pushing position, once the motor 600 cannot be stopped, the pushing member 700 will continue to move in the pushing direction, which will cause the second triggering part 790 to exert too much pressure on the second position switch 930, and the second position switch 930 may be crushed. Optionally, in one embodiment, the housing 200 is provided with a second limiting part 330, and the pushing member 700 is provided with a second elastic part 760. When the pushing member 700 is in the pushing position, the second limiting part 330 abuts against the second elastic part 760 to prevent the second triggering part 790 from crushing the second position switch 930. Thus, when the push member 700 reaches the first push position, the second elastic part 760 contacts the second limit part 330. Once the motor 600 cannot be stopped, the second elastic part 760 is compressed under the action of the second limit part 330, and the elastic potential energy of the second elastic part 760 gradually increases to prevent the push member 700 from continuing to move in the push direction, thereby reducing the possibility that the second trigger part 790 crushes the second position switch 930. In addition, under the elastic force of the second elastic part 760, the second elastic part 760 makes a smaller sound when contacting the second limit part 330, thereby preventing the switch device from generating a larger noise.

[0091] If the push member 700 reaches the first push position from the first push position, once the motor 600 cannot be stopped, the push member 700 will continue to move in the push direction, which will cause the second trigger part 790 to exert too much pressure on the second position switch 930, and the second position switch 930 may be crushed. Optionally, in one embodiment, the housing 200 is provided with a third rigid part 350, and the push member 700 is provided with a fourth rigid part 780 for abutting the third rigid part 350 to prevent the second trigger part 790 from crushing the second position switch 930. When the push member 700 moves from the first push position to the push direction, the fourth rigid part 780 approaches the third rigid part 350. In this way, when the push member 700 reaches the first push position, once the motor 600 cannot be stopped, the fourth rigid part 780 gradually approaches the third rigid part 350, so that the third rigid part 350 abuts against the fourth rigid part 780, thereby preventing the second trigger part 790 from crushing the second position switch 930. In addition, since both the third rigid part 350 and the fourth rigid part 780 are rigid, damage to both due to excessive force when the fourth rigid part 780 abuts against the third rigid part 350 can be reduced, thereby providing a guarantee to prevent the second trigger part 790 from crushing the second position switch 930.

[0092] If the push member 700 reaches the first push position from the first push position, once the motor 600 cannot be stopped, the push member 700 will continue to move in the push direction, which will cause the second trigger part 790 to exert too much pressure on the second position switch 930, and the second position switch 930 may be crushed. Optionally, in one embodiment, the housing 200 is provided with a second limit portion 330, and the push member 700 is provided with a second elastic portion 760. When the push member 700 is in the push position, the second limit portion 330 abuts against the second elastic portion 760 to prevent the second trigger part 790 from crushing the second position switch 930. The housing 200 is provided with a third rigid portion 350, and the push member 700 is provided with a fourth rigid portion 780 for abutting against the third rigid portion 350 to prevent the second trigger part 790 from crushing the second position switch 930. When the push member 700 moves from the first push position to the push direction, the fourth rigid portion 780 is close to the third rigid portion 350. In this way, the abutment time between the second elastic part 760 and the second limiting part 330 will be earlier than the abutment time between the third rigid part 350 and the fourth rigid part 780, that is, before the third rigid part 350 and the fourth rigid part 780 abut, when the pushing member 700 reaches the first pushing position, under the action of the second elastic part 760, the noise emitted by the door opening device 100 is relatively small. Once the motor 600 is out of control and the pushing member 700 moves from the first pushing position along the pushing direction, if the second elastic part 760 is damaged, the third rigid part 350 and the fourth rigid limiting part can still function. The second elastic part 760, the second limiting part 330, the third rigid part 350 and the fourth rigid part 780 jointly provide protection to prevent the second trigger part 790 from crushing the second position switch 930.

[0093] Optionally, in one embodiment, the second elastic portion 760 is configured as a spring. If the push member 700 is made of plastic, the push member 700 and the second elastic portion 760 can be integrally formed by injection molding. However, the present design is not limited thereto, and in other embodiments, the second elastic portion 760 is configured as a spring.

[0094] Optionally, in one embodiment, the door opening device 100 further includes a first position switch 920 and a second position switch 930 both connected to the motor 600. When the motor 600 drives the push member 700, the push member 700 may sequentially pass through the initial position and the first push position along the push direction. When the push member 700 moves from the first push position to the initial position, the first position switch 920 controls the motor 600 to stop the action. When the push member 700 is at the first push position, the second position switch 930 controls the motor 600 to drive the push member 700 to reset to the initial position. In this way, when the motor 600 receives the door opening signal, the output shaft 610 of the motor 600 rotates forward to drive the push member 700 at the initial position to move toward the first push position along the push direction, so that the push member 700 pushes the door body open. When the push member 700 is in the first push position, the second position switch 930 controls the output shaft 610 of the motor 600 to reverse, so as to drive the push member 700 to move toward the initial position along the first direction opposite to the first push direction. When the push member 700 reaches the initial position, the first position switch 920 controls the motor 600 to stop the action, so as to achieve the reset of the push member 700. In this way, the door opening device 100 has a compact layout. It should be noted that the output shaft 610 in this article can be either clockwise or counterclockwise rotation of the output shaft 610, and there is no limitation here. When the output shaft 610 rotates forward, the output shaft 610 rotates clockwise, and the output shaft 610 rotates reversely, and the output shaft 610 rotates counterclockwise. When the output shaft 610 rotates forward, the output shaft 610 rotates counterclockwise, and the output shaft 610 rotates reversely, and the output shaft 610 rotates clockwise.

[0095] However, the present design is not limited thereto. In other embodiments, the door opening device 100 further includes a second position switch 930 connected to the motor 600, and a reset spring connected to the housing 200 and the push member 700. When the motor 600 drives the push member 700, the push member 700 may sequentially pass through the initial position and the first push position along the push direction. When the push member 700 is at the first push position, the second position switch 930 controls the motor 600 to stop. The reset spring has a tendency to make the push member 700 move in the first direction opposite to the push direction. The reset spring is used to reset the push member 700 to the initial position. In this way, when the motor 600 receives the door opening signal, the output shaft 610 of the motor 600 rotates forward to drive the push member 700 at the initial position to move toward the first push position along the push direction, so that the push member 700 pushes the door body open. When the pushing member 700 is in the first pushing position, the second position switch 930 controls the motor 600 to stop moving, and under the pull of the return spring, the pushing member 700 moves in a first direction opposite to the pushing direction until the pushing member 700 returns to the initial position.

[0096] Refer to Fig.17 Optionally, in one embodiment, the housing 200 is provided with a guide rail 360, and the push member 700 is provided with a guide groove 710. The guide groove 710 includes a first section 720 and a second section 730 arranged in sequence in the pushing direction of the push member 700. The first section 720 is slidably matched with the guide rail 360, and there is a gap between the inner wall of the second section 730 and the guide rail 360. In this way, it is helpful to reduce the matching length of the guide groove 710 and the guide rail 360, and reduce the possibility of jamming during the sliding movement of the push member 700 in the guide groove 710. However, the present design is not limited to this. In other embodiments, the entire guide groove 710 is used to slide with the guide rail 360, and lubricating oil is provided between the guide groove 710 and the guide rail 360. In this way, the sliding movement of the push member 700 in the guide rail 360 is smoother.

[0097] Optionally, in one embodiment, the material of the push member 700 is plastic, and the push direction is the length direction of the push member 700, so that the push member 700 has a larger deformation in the push direction after injection molding. If the entire guide groove 710 is used for sliding cooperation with the guide rail 360, this will make the push member 700 more stuck when sliding on the guide rail 360. By designing the first section 720 and the second section 730 of the guide groove 710 to reduce the cooperation length between the guide groove 710 and the guide rail 360, it is helpful to reduce the possibility of the push member 700 being stuck when sliding on the guide groove 710. However, the present design is not limited to this. In other embodiments, the material of the push member 700 can also be steel, etc., which is not limited here.

[0098] Refer to Fig.18Optionally, in one embodiment, the two opposite inner side walls of the first section 720 are provided with convex ribs 740 that abut against the guide rail 360. In this way, it is beneficial to further reduce the contact area between the guide groove 710 and the guide rail 360, so that the push member 700 slides on the guide rail 360 more smoothly. However, the present design is not limited to this. In other embodiments, the two opposite sides of the guide rail 360 in the width direction are respectively provided with convex ribs 740 that abut against the first section 720. In this way, it is beneficial to further reduce the contact area between the guide groove 710 and the guide rail 360, so that the push member 700 slides on the guide rail 360 more smoothly.

[0099] Optionally, in one embodiment, the ribs 740 extend along the groove depth direction of the guide groove 710, and the two opposite side walls of the first section 720 in the pushing direction are provided with a plurality of ribs 740 arranged at intervals. In this way, the stability of the pushing member 700 sliding on the guide rail 360 is improved. However, the present design is not limited thereto. In other embodiments, the ribs 740 extend along the pushing direction, and the two opposite side walls of the first section 720 are provided with a plurality of ribs 740 arranged at intervals along the groove depth direction of the guide groove 710. In this way, the stability of the pushing member 700 sliding on the guide rail 360 is improved.

[0100] Optionally, in one embodiment, the outer peripheral surface of the rib 740 is convex toward the guide rail 360 to have an arc-shaped outer peripheral surface. In this way, the contact between the rib 740 and the guide rail 360 is a line-surface contact, which is conducive to further reducing the contact area between the guide groove 710 and the guide rail 360, so that the push member 700 slides on the guide rail 360 more smoothly. However, the present design is not limited to this, and in other embodiments, the contact between the rib 740 and the guide rail 360 can also be a surface-surface contact.

[0101] Optionally, in one embodiment, the housing 200 includes a bottom shell 300 and an upper shell 400 disposed above the bottom shell 300, the bottom shell 300 and the upper shell 400 limit a receiving cavity, the bottom shell 300 is provided with a guide rail 360, the upper shell 400 body 200 is provided with a recessed portion 410 that is recessed toward the bottom shell 300, and the recessed portion 410 and the push piece 700 are disposed oppositely in the vertical direction to limit the push piece 700 from being separated from the guide rail 360 in the upward direction. In this way, the push piece 700 can slide on the guide rail 360 more stably. However, the present design is not limited thereto, and in other embodiments, a limiting rib is disposed on one side of the upper shell 400 body 200 close to the bottom shell 300, and the limiting rib is disposed oppositely in the vertical direction to the push piece 700 to be separated from the guide rail 360 in the upward direction.

[0102] In order to achieve better working effects, refrigerators usually require better sealing effects. For this reason, sealing structures are usually provided between the door body and the refrigerator body, such as sealing strips, magnetic structures, etc., to maintain the sealing performance of the contact between the door body and the refrigerator body and the stability in the sealed state. However, this also increases the difficulty of opening the door to a certain extent, making the door opening operation inconvenient and causing inconvenience in the door opening operation. In order to facilitate the opening of the door body, a door opening device can be provided on the main body. The door opening device drives the push piece through the motor to push open the door body, so that the door body breaks through the door sealing force.

[0103] However, the current door opening device includes a shell and a motor directly connected to the inner wall of the shell. When the motor is running, the motor and the shell will strongly resonate, causing the door opening device to emit a large noise, thereby reducing the user experience.

[0104] To this end, the utility model also proposes a refrigerator, which includes the aforementioned door opening device 100. The specific structure of the door opening device 100 refers to the above-mentioned embodiment. Since the electrical device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0105] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0107] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by this application. Although the implementation methods of the present application have been shown and described, ordinary technicians in the field can understand that various changes, modifications, substitutions and variations can be made to these implementation methods without departing from the principles and purpose of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A door opening device, applied to an electrical device, wherein the electrical device comprises a door body, characterized in that: The door opening device comprises: A shell having a receiving cavity; A motor bracket, arranged on the housing; a motor, which is received in the receiving cavity, wherein the motor comprises an output shaft and a motor body connected to the output shaft, wherein the motor body is arranged on the motor bracket so that the motor body is suspended in the receiving cavity; and A pushing member is drivingly connected to the output shaft, and the pushing member is used to push open the door body.

2. The door opening device according to claim 1, characterized in that: The motor body has a first end for the output shaft to pass through, and the motor body is connected to the motor bracket through the first end.

3. The door opening device according to claim 1, characterized in that: The door opening device also includes a retaining structure, which together with the motor bracket defines a grease retaining cavity for accommodating grease. The output shaft is provided with output teeth, and the output shaft is drivingly connected to the push member via the output teeth, and the output teeth are provided in the grease retaining cavity.

4. The door opening device according to claim 3, characterized in that: The inner wall surface of the grease retaining cavity comprises a first wall surface provided on the retaining structure and a second wall surface provided on the motor bracket, and the first wall surface and / or the second wall surface are provided in an arc surface around the output shaft.

5. The door opening device according to claim 4, characterized in that: The retaining structure is integrally formed with the housing; Alternatively, the retaining structure is configured as a separate component, and the retaining structure is detachably connected to the motor bracket.

6. The door opening device according to claim 3, characterized in that: The door opening device comprises a gear mechanism, and the output tooth drives the pushing member through the gear mechanism.

7. The door opening device according to claim 6, characterized in that: The gear mechanism comprises a first gear with a maximum rotation speed greater than a preset rotation speed, and the housing is provided with a first rotating shaft for rotationally connecting the first gear; The first rotating shaft is configured as a ceramic shaft or a steel shaft; or, the first gear is rotatably connected to the first rotating shaft via a bearing.

8. The door opening device according to claim 6, characterized in that: The housing comprises a bottom shell and an upper shell arranged above the bottom shell, the bottom shell and the upper shell define the receiving cavity, and the gear mechanism comprises a plurality of gears rotatably connected to the bottom shell; And / or, the output tooth is configured as a worm, the gear mechanism includes a turbine connected to the worm, the turbine is rotatably disposed on the motor bracket, and the motor bracket is detachably connected to the housing.

9. The door opening device according to claim 1, characterized in that: The door opening device also includes a first position switch connected to the motor, and the shell has an initial position and a first pushing position for the pushing member to pass along the pushing direction of the pushing member. When the pushing member moves from the first pushing position to the initial position, the first position switch controls the motor to stop moving.

10. The door opening device according to claim 9, characterized in that: The door opening device also includes a trigger tooth drivingly connected to the output shaft, the trigger tooth having a first trigger portion and a plurality of tooth portions for engaging with the pushing member, when the pushing member moves along the pushing direction, the pushing member sequentially engages with the plurality of tooth portions whose rotating shaft distances from the trigger tooth gradually increase, and the first trigger portion is used to press the first position switch so that the first position switch controls the motor to stop moving.

11. The door opening device according to claim 10, characterized in that: The housing is provided with a first limiting portion, and the pushing member is provided with a first elastic portion. When the pushing member is located at the initial position, the first limiting portion abuts against the first elastic portion to prevent the first triggering portion from crushing the first position switch; And / or, the shell is provided with a first rigid part, and the pushing member is provided with a second rigid part for abutting the first rigid part to prevent the first trigger part from crushing the first position switch, and when the pushing member moves from the initial position toward a first direction opposite to the pushing direction, the second rigid part approaches the first rigid part.

12. The door opening device according to any one of claims 1 to 11, characterized in that: The door opening device also includes a second position switch connected to the motor, and the shell has an initial position and a first pushing position for the pushing member to pass along the pushing direction of the pushing member. When the pushing member reaches the first pushing position, the second position switch controls the motor to drive the pushing member to reset to the initial position.

13. The door opening device according to claim 12, characterized in that: The pushing member is provided with a second triggering portion, and the second triggering portion is used to press the second position switch so that the second position switch controls the motor to drive the pushing member to reset to the initial position.

14. The door opening device according to claim 13, characterized in that: The housing is provided with a second limiting portion, and the pushing member is provided with a second elastic portion. When the pushing member is located at the pushing position, the second limiting portion abuts against the second elastic portion to prevent the second triggering portion from crushing the second position switch. And / or, the shell is provided with a third rigid part, and the pushing member is provided with a fourth rigid part for abutting the third rigid part to prevent the second trigger part from crushing the second position switch, and when the pushing member moves from the first pushing position toward the pushing direction, the fourth rigid part approaches the third rigid part.

15. The door opening device according to claim 1, characterized in that: The shell is provided with a guide rail, and the pushing member is provided with a guide groove. The guide groove includes a first section and a second section arranged sequentially in the pushing direction of the pushing member. The first section is slidably matched with the guide rail, and there is a distance between the inner wall of the second section and the guide rail.

16. The door opening device according to claim 15, characterized in that: The two opposite inner side walls of the first section are provided with convex ribs abutting against the guide rail; And / or, the shell includes a bottom shell and an upper shell arranged above the bottom shell, the bottom shell and the upper shell limit the accommodating cavity, the bottom shell is provided with a guide rail, the upper shell has a recessed portion recessed toward the bottom shell, and the recessed portion is arranged relative to the pushing member in the up and down directions to limit the pushing member from detaching from the guide rail in the upward direction.

17. A refrigerator, characterized in that: Comprising a door opening device as described in any one of claims 1 to 16.

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