A push-to-open mechanism and a refrigerator

Abstract

This invention discloses a push-to-open door mechanism and a refrigerator, including a cabinet, a door, and a push-to-open door mechanism. The push-to-open door mechanism includes a base, a main push rod, a drive rod, a hook, and a locking groove. This device has two push rods. When the door is pressed, the push rod on the handle side is compressed and moves inward, disengaging the hook from the locking groove. Then, under the action of a spring, the push rod on the handle side springs forward, pressing the door. Then, through a series of linkages, the push rod on the pivot side presses the door end cover. Through the coordinated pressing of the two push rods, the door easily pops out, achieving automatic door opening. This device is not limited to any product type; it can be designed with the cabinet positioned at the top or bottom, incorporating a hinge cover at the top and a kick-foot device at the bottom, adapting to single-door, double-door, and four-door refrigerators. Furthermore, this device has a simple structure, low cost, and no risk of motor failure.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, specifically to a push-to-open door mechanism and a refrigerator. Background Technology

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature; it is also a consumer product that keeps food or other items at a constant low temperature. The interior contains a compressor, an ice maker, and a cabinet or box for freezing ice; it is a storage box with a refrigeration system. The capacity of a household refrigerator typically ranges from 20 to 500 liters. In the refrigerator industry, with the development of technology and the improvement of automation levels, more and more refrigerators are being researched to improve their intelligence level, among which automatic door opening is a common function in intelligent control.

[0003] Currently, refrigerators often feature automatic door opening mechanisms. Existing technologies typically use a motor-driven gear-driven push rod to open the door, as illustrated in Chinese invention patent application CN 115682589 A, which discloses an automatic double-door opening device, opening method, and refrigerator. However, this method suffers from complex structure and high cost. Furthermore, there have been instances where the opening mechanism has failed due to motor damage. Another approach utilizes electromagnetic door opening, employing an electromagnetic module placed inside the door and cabinet insulation layers to achieve automatic door opening, as illustrated in Chinese patent application CN 115823819 A, which discloses an electromagnetic automatic door opening system and refrigerator. However, this approach also suffers from high cost and occupies the insulation layers of the door and cabinet, affecting the refrigerator's heat insulation performance and creating a risk of condensation on the surface. Summary of the Invention

[0004] The technical problem solved by this invention is that existing automatic door opening devices are expensive and occupy the foam layer of the door and cabinet, affecting the heat insulation effect of the refrigerator and posing a risk of condensation on its surface.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A push-to-open mechanism, comprising:

[0007] The base is fixedly mounted on the box body. A guide groove is provided on the base at the position corresponding to the movable end of the door body. A first shaft is also fixedly mounted on the base.

[0008] The main push rod is slidably disposed in the guide groove. A compression spring is provided between one end of the main push rod and the base, and the other end of the main push rod can contact the door body.

[0009] A drive rod is rotatably mounted on the first shaft, and one end of the drive rod is rotatably connected to the main push rod;

[0010] A hook component, which is rotatably connected to the other end of the drive rod;

[0011] A locking groove is formed on the base, the position of the locking groove matches the position of the hook component, the shape of the locking groove matches the trajectory of the drive rod rotating around the first axis, and the width of the locking groove matches the size of the hook component. A locking area is formed at the end of the locking groove near the door body, and a first locking block and a second locking block are provided within the locking area. The first locking block has a first locking bevel on its side away from the door body, and the second locking block has a V-shaped locking notch recessed at its end near the first locking block. The dimensions between the sides of the first and second locking blocks and the locking groove match the dimensions of the hook structure to form a moving channel for the hook structure. A first bend is provided at the end of the locking groove away from the guide groove, and a second bend is provided on the side of the locking groove near the guide groove, the second bend being located between the first and second locking blocks.

[0012] In one embodiment of the present invention: a rectangular expansion portion is provided on the main top rod, and columnar structures are respectively connected to both ends of the expansion portion. A rectangular space is formed inside the expansion portion, and a connecting portion matching the rectangular space is provided at the end of the drive rod.

[0013] The hook component includes a main plate, one side of which is provided with a rod-shaped structure for rotatably connecting with a drive rod, and the other side is fixedly connected to a hook structure, which is located on the side facing the base.

[0014] In one embodiment of the present invention: a second shaft and a third shaft are also fixedly disposed on the base, the first shaft, the second shaft and the third shaft being arranged sequentially from the free end of the door body towards the connecting end; the push-opening mechanism further includes a push-assist component, the push-assist component comprising:

[0015] A linkage rod has a second through hole in its middle that matches the second shaft. One end of the linkage rod is rotatably connected to the drive rod. The connection point between the linkage rod and the drive rod is located between the first shaft and the hook.

[0016] A secondary top rod is rotatably connected to the base via a third shaft, and the secondary top rod is bent. One end of the secondary top rod can contact the door body, and the other end of the secondary top rod protrudes outward to form two protrusions with a contact notch between them. A torsion spring is provided at the secondary top rod, and the torsion spring drives the outer end of the secondary top rod to abut against the inner wall of the door body through elastic force.

[0017] A secondary rod locking component is provided, which is slidably disposed along the length direction of the linkage rod. One end of the secondary rod locking component is provided with a tension spring. The end of the tension spring away from the secondary rod locking component is hung on the linkage rod. The other end of the secondary rod locking component is bent to form a contact part, which is in contact with the contact notch of the fixed rod.

[0018] A blocking block is slidably disposed on the base. The blocking block corresponds to the position of the secondary rod locking member, and a compression spring is provided at one end of the blocking block.

[0019] In one embodiment of the present invention: a roller is provided at one end of the auxiliary top rod near the door body, and the outer circumference of the roller contacts the door body.

[0020] In one embodiment of the present invention: a sliding cavity is formed inside the linkage rod, and the secondary rod locking member is slidably disposed inside the sliding cavity.

[0021] In one embodiment of the present invention, a mounting cover is detachably connected to the base.

[0022] A refrigerator includes a cabinet and a door that are rotatably connected, wherein the bottom and / or top of the cabinet are provided with the aforementioned push-to-open mechanism.

[0023] In one aspect of the present invention: a handle is provided on the side of the door.

[0024] In one aspect of the present invention, the cabinet body is designed as an integrated unit with the cabinet.

[0025] According to the push-to-open mechanism and refrigerator of the present invention, at least one of the following technical effects is achieved:

[0026] This device features two push rods. When the door is pressed, the push rod on the handle side is compressed and moves inward, disengaging the locking pin from the locking groove. Then, under the action of a spring, the push rod on the handle side springs forward, pressing the door open. A series of linkages then drives the push rod on the pivot side to press the door end cover. The coordinated compression of the two push rods allows the door to easily pop open, achieving automatic door opening. This device is not limited to any product type; it can be designed with the refrigerator body positioned at the top or bottom, incorporating a hinge cover at the top and a kick-foot mechanism at the bottom, accommodating single-door, double-door, and four-door refrigerators. Furthermore, this device has a simple structure, low cost, and no risk of motor failure.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a structural schematic diagram of the integrated design of the invention and the cabinet;

[0030] Figure 2 This is a schematic diagram of the structure of the push-to-open mechanism of the present invention, which features a mounting cover on the top.

[0031] Figure 3 This is a schematic diagram of the top design of the push-to-open mechanism of the present invention without a mounting cover;

[0032] Figure 4 This is a schematic diagram of the structure of the push-to-open mechanism of the present invention, which has a mounting cover at the bottom;

[0033] Figure 5 This is a schematic diagram of the bottom design of the push-to-open mechanism of the present invention without a mounting cover;

[0034] Figure 6 This is a schematic diagram of the structure of the top of the push-to-open mechanism of the present invention in the closed state;

[0035] Figure 7 This is a schematic diagram of the top design of the door opening mechanism of the present invention in the open state;

[0036] Figure 8 This is a three-dimensional exploded structural diagram of the push-to-open mechanism of the present invention;

[0037] Figure 9 This is the present invention. Figure 8 A magnified structural diagram of part A in the middle;

[0038] Figure 10 This is the present invention. Figure 8 A magnified structural diagram of section B in the middle;

[0039] Figure 11 This is a schematic diagram of the structure of the base of the present invention;

[0040] Figure 12 This is a three-dimensional structural diagram of the hook component of the present invention;

[0041] Figure 13 This is a schematic diagram illustrating the principle of the push-to-open mechanism of the present invention when the door is opened by pressing.

[0042] Figure 14 This is a schematic diagram illustrating the principle of the automatic door opening process of the push-to-open mechanism of the present invention;

[0043] Figure 15 This is a schematic diagram of the structure of the push-to-open mechanism of the present invention after the door is opened;

[0044] Figure 16 This is a schematic diagram of the structure of the door body and the arrangement of its contact points according to the present invention;

[0045] Figure 17 This is a schematic diagram of the top mounting cover of the present invention;

[0046] Figure 18 This is a schematic diagram of the bottom mounting cover of the present invention.

[0047] In the diagram: 1. Cabinet body; 2. Door; 3. Cabinet; 4. Base; 5. Guide groove; 6. First shaft; 7. Second shaft; 8. Third shaft; 9. Main top rod; 10. Expansion part; 11. Drive rod; 12. Hook; 13. Locking groove; 14. First locking block; 15. Second locking block; 16. Linkage rod; 17. Secondary top rod; 18. Secondary rod locking part; 19. Blocking block; 20. Mounting cover. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0050] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0051] Please see Figure 1-5This invention relates to a refrigerator, comprising a cabinet body 1, a door body 2, and a push-to-open mechanism. The cabinet body 1 can be integrated with a cabinet 3. Given the growing trend of built-in home furnishings, this design, based on overall aesthetic considerations, can coordinate with the cabinet 3, achieving a truly seamless integration. The door body 2 is rotatably connected to the cabinet body 1, and this rotatable connection can be a hinge connection. The number of doors 2 can be one, two, or four. That is, the refrigerator can be a single-door, double-door, or four-door refrigerator. A push-to-open mechanism is provided at the bottom and / or top of the cabinet body 1, which is used to automatically open the door body 2. In use, the door body 2 is first pressed, and then the push-to-open mechanism automatically pushes the door body 2 open by a certain gap, allowing the door body 2 to be opened. Furthermore, a handle is provided on the side of the door body 2, which can be a recessed structure formed by the downward curve of the side of the door body 2. After the door 2 is pushed out to a certain angle by the aforementioned pressing opening mechanism, a handle is designed on the decorative strip on the side of the door 2, and the door 2 can be opened and closed by manually pushing and pulling it.

[0052] Please see Figure 2-15 In one embodiment of the present invention, the push-to-open mechanism provided on the top of the box 1 is described below as an example. The push-to-open mechanism includes: a base 4, a main top rod 9, a drive rod 11, a hook 12, and a locking groove 13.

[0053] Please see Figure 2-15 In one embodiment of the present invention, the base 4 is fixedly mounted on the housing 1. A guide groove 5 is provided on the base 4 at a position corresponding to the movable end of the door 2 (the end of the door 2 connected to the housing 1 is the connecting end, and the other end is the movable end). The guide groove 5 can be arranged perpendicularly to the door 2 in the closed state. A first shaft 6, a second shaft 7, and a third shaft 8 are also fixedly mounted on the base 4. The first shaft 6, the second shaft 7, and the third shaft 8 are all located in the area between the movable end and the connecting end of the door 2, and are arranged sequentially from the free end of the door 2 towards the connecting end.

[0054] Please see Figure 2-15In one embodiment of the present invention, the main push rod 9 is slidably disposed within the guide groove 5. A compression spring is disposed between one end of the main push rod 9 and the base 4. The compression spring, disposed within the guide groove 5, provides elastic force to the main push rod 9, allowing the other end of the main push rod 9 to contact the door body 2. This contact point should be located near the movable end of the door body 2, thereby obtaining a larger rotational force arm. The main push rod 9 may include a rectangular expansion portion 10. Both ends of the expansion portion 10 are connected to cylindrical structures. One cylindrical structure can be inserted into the compression spring to improve connection stability, while the other cylindrical structure can be used to contact and push the door body 2. A rectangular space can be formed within the expansion portion 10 for rotational connection with the drive rod 11.

[0055] Please see Figure 2-15 In one embodiment of the present invention, the drive rod 11 is rotatably mounted on the first shaft 6, that is, the middle part of the drive rod 11 has a first through hole matching the first shaft 6, and the drive rod 11 is rotatably sleeved on the first shaft 6 through the first through hole to achieve a rotatable connection with the base 4. One end of the drive rod 11 is rotatably connected to the main push rod 9. Specifically, a connecting part can be provided at one end of the main push rod 9. The connecting part extends into the rectangular space inside the expansion part 10. The expansion part 10 and the connecting part are respectively provided with hinge holes, and the expansion part 10 and the connecting part are hinged by a pin passing through the hinge holes. The hinge hole on the connecting part is a strip hole, that is, its length dimension is greater than its width dimension to compensate for the dimensional changes caused by the rotation of the drive rod 11.

[0056] Please see Figure 2-15 In one embodiment of the present invention, the hook 12 is rotatably connected to the other end of the drive rod 11, that is, the hook 12 is located at the end of the drive rod 11 away from the main top rod 9, and the hook 12 and the drive rod 11 are damped together, meaning that the hook 12 will not rotate unless subjected to external force. Specifically, a damping ring can be provided at the connection position between the hook 12 and the drive rod 11, or, as shown in the attached figure, the part connecting the hook 12 and the drive rod 11 can be arranged in a cross structure and then fixed by a retaining ring, achieving a damping connection through frictional resistance. Specifically, the hook 12 may include a main body plate, one side of which is provided with a rod-shaped structure for rotatably connecting to the drive rod 11, and the other side is fixedly connected to a hook structure for achieving a locking effect. The hook structure is located on the side facing the base 4, and the rod-shaped structure and the hook structure are staggered.

[0057] Please see Figure 2-15In one embodiment of the present invention, a locking groove 13 is provided on the base 4. The position of the locking groove 13 matches the position of the hook 12. The shape of the locking groove 13 matches the trajectory of the drive rod 11 (the end away from the main top rod 9) rotating around the first axis 6. The size of the locking groove 13 matches the diameter of the hook structure. The width of the locking groove 13 must be greater than the diameter of the hook structure so that the hook structure can move along the locking groove 13. A locking area is formed at the end of the locking groove 13 near the door body 2. A first locking block 14 and a second locking block 15 are provided in the locking area. A first locking slope is provided on the side of the first locking block 14 away from the door body 2. The second locking block 15 is recessed at one end near the first locking block 14 to form a V-shaped locking notch, and protrudes outward at the other end to form a V-shaped guide protrusion. The dimensions between the two sides of the first locking block 14 and the second locking block 15 and the locking groove 13 match the dimensions of the hook structure to form a moving channel for the hook structure. A first bend is provided on the side of the locking groove 13 away from the guide groove 5, and a second bend is provided on the side of the locking groove 13 closer to the guide groove 5. The second bend is located between the first locking block 14 and the second locking block 15. During the opening process, the first bend causes the hook 12 to rotate. The second bend guides the hook structure of the hook 12 during the closing process, causing it to rotate between the first locking block 14 and the second locking block 15 to form a lock.

[0058] Please see Figure 2-15 In one embodiment of the present invention, the push-to-open mechanism further includes a push-assist component, which is used to assist the main push rod 9 in the opening process of the door 2. The push-assist component includes a linkage rod 16, a secondary rod locking member 18, a secondary push rod 17, and a blocking block 19.

[0059] Please see Figure 2-15 In one embodiment of the present invention, a second through hole matching the second shaft 7 is provided in the middle of the linkage rod 16, and the linkage rod 16 is rotatably connected to the base 4 through the second through hole and the second shaft 7. One end of the linkage rod 16 is rotatably connected to the drive rod 11, and the connection point between the linkage rod 16 and the drive rod 11 is located between the first through hole and the hook member 12. Specifically, multiple pins can be used for connection. Furthermore, the connection hole on the drive rod 11 can be configured as a strip hole to compensate for positional changes caused by the rotation of the linkage rod 16.

[0060] Please see Figure 2-15In one embodiment of the present invention, the secondary push rod 17 is rotatably connected to the base 4 and is bent. A third through hole matching the third shaft 8 is provided in the middle of the secondary push rod 17. The secondary push rod 17 is rotatably connected to the base 4 through the third through hole and the third shaft 8. One end of the secondary push rod 17 can contact the door body 2. Furthermore, a roller is provided at the end of the secondary push rod 17 near the door body 2, and the outer surface of the roller can contact the door body 2, reducing the pushing resistance of the secondary push rod 17 through rolling contact. The other end of the secondary push rod 17 protrudes outward to form two protrusions, forming a contact notch between the two protrusions for matching with the secondary rod locking member 18, achieving a partial locking effect during movement. A torsion spring is provided at the secondary push rod 17, and the torsion spring drives the outer end of the secondary push rod 17 to abut against the inner wall of the door body 2 through elastic force.

[0061] Please see Figure 2-15 In one embodiment of the present invention, the secondary rod locking member 18 is slidably disposed along the length direction of the linkage rod 16, and the sliding connection between the two can be achieved through a sliding groove and a slider structure. Preferably, a sliding cavity is formed inside the linkage rod 16, and the secondary rod locking member 18 is slidably disposed in the sliding cavity. The secondary rod locking member 18 has two strip-shaped holes, and a pin structure passes through the linkage rod 16 and the secondary rod locking member 18 to limit the movement direction of both and the secondary rod locking member 18, ensuring the movement stability of the secondary rod locking member 18. A tension spring is provided at one end of the secondary rod locking member 18, and the end of the tension spring away from the secondary rod locking member 18 is hung on the linkage rod 16 (a hook-shaped hanging part can be provided on the linkage rod 16 for connection). The other end of the secondary rod locking member 18 can be bent to form an L-shaped structure, and the other end of the secondary rod locking member 18 is bent to form a contact part, which contacts and connects with the notch position of the fixed rod.

[0062] Please see Figure 2-15In one embodiment of the present invention, a blocking block 19 is slidably disposed on the base 4. The blocking block 19 corresponds to the position of the secondary rod locking member 18, and a compression spring is disposed at one end of the blocking block 19. When the door 2 is in the closed state, the blocking block 19 at the end of the secondary rod locking member 18 acts as a block, overcoming the tension of the tension spring. Further, a torsion spring is disposed at the position of the secondary push rod 17. The torsion spring is used to provide a force to the secondary push rod 17 in the direction of opening the door 2, causing the secondary push rod 17 to rotate around the third axis 8. In the closed state, the secondary rod locking member 18 abuts against a protrusion on the fixed rod at a distance to lock the secondary push rod 17, and then the blocking block 19 locks the secondary rod locking member 18. During the opening process, the end of the linkage rod 16 near the drive rod 11 swings upward, causing the secondary rod locking member 18 to disengage from the blocking block 19, thereby engaging the locking of the secondary rod locking member 18 and the secondary push rod 17. This allows the secondary push rod 17 and the main push rod 9 to work together to push the door body 2.

[0063] Please see Figure 16-18 In one embodiment of the present invention, a mounting cover 20 is provided on the base 4. The mounting cover 20 is detachably connected to the base 4 to cover the entire push-to-open mechanism. The mounting cover 20 has a notch corresponding to the position of the main push rod 9 and a through hole corresponding to the position of the auxiliary push rod 17. This provides mounting positions for the main push rod 9 and the auxiliary push rod 17. When the mounting cover 20 is located on the top of the cabinet 1, a hinge cover may be provided on the mounting cover 20. The hinge cover is used to cover the hinge structure connecting the door 2 and the refrigerator body. When the mounting cover 20 is located on the bottom of the cabinet 1, the mounting cover 20 may have heat dissipation holes for adaptive matching with the corresponding structure.

[0064] The working principle of the present invention is as follows: Each door body 2 corresponds to a set of push-to-open mechanisms. Each push-to-open mechanism may include a main push rod 9 and a secondary push rod 17. The following description takes the push-to-open mechanism set on the top of the box body 1 corresponding to the right door body 2 as an example.

[0065] In the closed state: the compression spring corresponding to the main push rod 9 is in a contracted state, the outer end of the main push rod 9 abuts against the inner surface of the door body 2, and the hook 12 abuts against the V-shaped locking notch formed by the recess of the second locking block 15 near the first locking block 14, thereby locking the main push rod 9; the left end of the secondary rod locking member 18 abuts against the right end of the blocking block 19, and the right end of the secondary rod locking member 18 abuts against a protrusion on the right side of the secondary push rod 17, thereby locking the secondary push rod 17 through the blocking block 19 and the secondary rod locking member 18. At this time, the tension spring is in an extended state, and the torsion spring is in a stored state.

[0066] Automatic door opening process: First, press the door body 2 to apply pressure. At this time, the main push rod 9 retracts inward (upward in the figure), which in turn drives the drive rod 11 to rotate slightly. Figure 13 The drive rod 11 swings clockwise at a certain angle, with the left end pointing upwards and the right end downwards. At this point, the hook 12 contacts the first locking ramp of the first locking block 14, causing the hook 12 to swing upwards relative to the drive rod 11 (the hook 12 rotates counterclockwise around the connection position), allowing the hook structure of the hook 12 to swing to the right of the first locking block 14 and the second locking block 15. Then, the compression spring of the main push rod 9 releases its potential energy, driving the main push rod 9 to move outwards and push the door 2 to open outwards. During this process, the drive rod 11 rotates. Figure 14 (Counterclockwise), the hook structure of hook 12 along Figure 14 The dashed line trajectory shown moves upward. During the rotation of drive rod 11, the left end of linkage rod 16 moves upward (in...). Figure 14 The linkage rod 16 rotates clockwise around the second axis 7, causing the left end of the secondary rod locking member 18 to move upward and then disengage from the blocking block 19. At this time, the tension spring contracts, and the secondary rod locking member 18 moves to the left, releasing the locking of the secondary push rod 17. At the same time, its contact part contacts the protrusion on the left side of the secondary push rod 17 to pull it. Simultaneously, the elastic potential energy released by the torsion spring generates elastic force to drive the secondary push rod 17, causing the secondary push rod 17 to rotate counterclockwise around the third axis 8. The roller of the secondary push rod 17 rolls into contact with the door body 2, assisting the main push rod 9 in pushing the door body 2 open. The main push rod 9 and the secondary push rod 17 cooperate to automatically open the door body 2 with a gap, and then the door body 2 can be easily opened manually.

[0067] Closing process: Pressing the door body 2 causes the main push rod 9 and the secondary push rod 17 to retract. During this process, the right end of the drive rod 11 swings downward, and the hook 12 moves downward along the locking groove 13 until it reaches the locking area. The hook structure of the hook 12 contacts the second bend on the left side of the first locking block 14 and the second locking block 15, causing the hook structure to rotate upward relative to the drive rod 11 and move between the first locking block 14 and the second locking block 15, forming a lock at the V-shaped locking notch formed by the concavity of the second locking block 15. At the same time, during this process, the door body 2 presses the secondary push rod 17 to transform it into the initial closed state. The secondary push rod 17 rotates clockwise, and the secondary rod locking member 18 moves to the right. Simultaneously, the drive rod 11 drives the left end of the linkage rod 16 to swing downward. Finally, the left end of the secondary rod locking member 18 abuts against the right side of the blocking block 19, forming a lock on the secondary push rod 17.

[0068] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the scope of the claims.

Claims

1. A push-to-open door mechanism, characterized in that, include: The base (4) is fixedly mounted on the box (1). A guide groove (5) is provided on the base (4) at the position corresponding to the movable end of the door (2). A first shaft (6) is also fixedly mounted on the base (4). The main top rod (9) is slidably disposed in the guide groove (5). A compression spring is provided between one end of the main top rod (9) and the base (4). The other end of the main top rod (9) can contact the door body (2). A drive rod (11) is rotatably mounted on the first shaft (6), and one end of the drive rod (11) is rotatably connected to the main push rod (9); Hook (12), which is rotatably connected to the other end of the drive rod (11); A locking groove (13) is formed on the base (4). The position of the locking groove (13) matches the position of the hook (12). The shape of the locking groove (13) matches the trajectory of the drive rod (11) rotating around the first axis (6). The width of the locking groove (13) matches the hook structure size of the hook (12). The locking groove (13) forms a locking area at one end near the door (2). A first locking block (14) and a second locking block (15) are provided in the locking area. The first locking block (14) is provided with a first locking block (15) on the side away from the door (2). The locking slope is formed by the second locking block (15) being recessed at one end near the first locking block (14) to form a V-shaped locking notch. The dimensions between the two sides of the first locking block (14) and the second locking block (15) and the locking groove (13) are matched with the dimensions of the hook structure of the hook member (12) to form a moving channel for the hook structure. The locking groove (13) is provided with a first bend at one end away from the guide groove (5). The locking groove (13) is provided with a second bend on one side near the guide groove (5). The second bend is located between the first locking block (14) and the second locking block (15).

2. The push-to-open door mechanism according to claim 1, characterized in that, A rectangular expansion section (10) is provided on the main top rod (9). The two ends of the expansion section (10) are respectively connected to columnar structures. A rectangular space is formed inside the expansion section (10). The end of the drive rod (11) is provided with a connection part that matches the rectangular space.

3. The push-to-open door mechanism according to claim 2, characterized in that, The hook component (12) includes a main plate, one side of which is provided with a rod-shaped structure for rotatably connecting with the drive rod (11), and the other side is fixedly connected with a hook structure, which is located on the side facing the base (4).

4. A push-to-open door mechanism according to claim 1, characterized in that, The base (4) is also fixedly provided with a second shaft (7) and a third shaft (8). The first shaft (6), the second shaft (7) and the third shaft (8) are arranged sequentially from the free end of the door body (2) toward the connecting end. The push-opening mechanism also includes a push-assist component, which includes: Linkage rod (16), the middle part of which has a second through hole matching the second shaft (7), one end of the linkage rod (16) is rotatably connected to the drive rod (11), and the connection point of the linkage rod (16) and the drive rod (11) is located between the first shaft (6) and the hook (12); A secondary top rod (17) is rotatably connected to the base (4) via a third shaft (8), and the secondary top rod (17) is bent. One end of the secondary top rod (17) can contact the door body (2), and the other end of the secondary top rod (17) protrudes outward to form two protrusions, and a contact gap is formed between the two protrusions. A torsion spring is provided at the secondary top rod (17), and the torsion spring drives the outer end of the secondary top rod (17) to abut against the inner wall of the door body (2) through elastic force. A secondary rod locking member (18) is slidably arranged along the length direction of the linkage rod (16). One end of the secondary rod locking member (18) is provided with a tension spring. The end of the tension spring away from the secondary rod locking member (18) is hung on the linkage rod (16). The other end of the secondary rod locking member (18) is bent to form a contact part. The contact part is in contact with the contact notch of the secondary top rod (17). The blocking block (19) is slidably disposed on the base (4). The blocking block (19) corresponds to the position of the auxiliary rod locking member (18), and a compression spring is provided at one end of the blocking block (19).

5. A push-to-open door mechanism according to claim 4, characterized in that, The auxiliary top rod (17) is equipped with a roller at one end near the door body (2), and the outer surface of the roller contacts the door body (2).

6. A push-to-open door mechanism according to claim 5, characterized in that, A sliding cavity is formed inside the linkage rod (16), and the secondary rod locking member (18) is slidably disposed inside the sliding cavity.

7. A push-to-open door mechanism according to claim 6, characterized in that, A mounting cover (20) is detachably connected to the base (4).

8. A refrigerator comprising a rotatably connected body (1) and a door (2), wherein the bottom and / or top of the body (1) are provided with a push-to-open mechanism according to any one of claims 1 to 7.

9. A refrigerator according to claim 8, characterized in that, The door (2) has a handle on its side.

10. A refrigerator according to claim 8, characterized in that, The cabinet (1) and the cabinet (3) are designed as a single unit.

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