A manually stepless height-adjustable synchronous lifting shelf device and refrigerator

Abstract

The application discloses a kind of synchronous lifting shelf devices of manually stepless height adjustment and refrigerator, including first shelf, second shelf, lifting assembly and transmission assembly;The lower part of the two sides of the first shelf is connected with the lifting assembly, and the upper part of the two sides of the second shelf is connected with the lifting assembly;The side of the first shelf opposite to the second shelf is provided with transmission assembly, which can drive the lifting assembly to lift, and then the lifting assembly drives the second shelf to lift relative to the first shelf.The application makes the second shelf relative to the first shelf lift by lifting assembly, and the height adjustment range between the first shelf and the second shelf is larger;In addition, the lifting assembly can support the second shelf, thereby improving the load capacity of the second shelf, when the second shelf is placed with heavier articles, the lifting assembly can still keep the second shelf relative to the first shelf stable lifting.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and more particularly to a manually adjustable, stepless, synchronously lifting shelf device and a refrigerator. Background Technology

[0002] As refrigerator consumption upgrades, users have higher demands for the user experience and more diverse storage needs. Refrigerator shelves, as frequently used components, require optimized functionality to both visually enhance the product's perceived quality and meet consumer storage requirements.

[0003] Conventional refrigerator shelf assembly mainly involves creating thermoformed ribs on the refrigerator's inner liner and then placing the glass shelf on top of these ribs. When users need to adjust the height of the refrigerator shelf, they can remove the shelf and place it on a rib at a different height to complete the height adjustment. However, this process is cumbersome and does not allow for arbitrary height adjustments of the refrigerator shelf.

[0004] Chinese utility model patent with authorization publication number CN217465059U discloses a shelf assembly in which a timing belt cooperates with a screw. The shelf can be adjusted up and down by pushing and pulling the timing belt to drive the screw. However, due to the limited range of movement of the timing belt, the screw can only move within a small range, resulting in a small shelf adjustment range.

[0005] Chinese utility model patent CN210463706U discloses a synchronized automatic lifting shelf device for a refrigerator. It utilizes the meshing of bevel gears; when the horizontal bevel gear rotates under the drive of a motor, it causes the vertical bevel gear to rotate, thereby driving the vertical movement of the shelf. However, because the lifting mechanism is installed at the rear of the refrigerator, it is difficult to maintain synchronized rising or falling motion on the other side when heavy items are placed on the shelf.

[0006] To address the above problems, the present invention provides a new shelf device. Summary of the Invention

[0007] In view of this, the present invention provides a manually stepless height-adjustable synchronous lifting shelf device and a refrigerator, which solves the problem that the height adjustment range of refrigerator shelves is small in the prior art, and the lifting mechanism is difficult to maintain synchronous lifting when the shelves are filled with heavy items.

[0008] To achieve one or more of the above objectives or other objectives, the technical solution of the present invention is to provide a synchronous lifting shelf device with manual stepless height adjustment, comprising a first shelf, a second shelf, a lifting assembly, and a transmission assembly.

[0009] The two sides of the first shelf are connected to the lower part of the lifting assembly, and the two sides of the second shelf are connected to the upper part of the lifting assembly.

[0010] The first shelf has a transmission component on the side facing away from the second shelf. This transmission component can drive the lifting component to move up and down, and in turn, the lifting component drives the second shelf to move up and down relative to the first shelf.

[0011] Furthermore, the lifting assembly includes a fixed block, a first moving block, a second moving block, a first connecting member, a second connecting member, and a third connecting member;

[0012] One side of the fixed block is rotatably connected to one end of the first connector, and the other end of the first connector passes horizontally through the first movable block, and the first movable block can move relative to the first connector.

[0013] One end of the second connector is perpendicularly connected to the top of the first movable block, and the other end of the second connector passes perpendicularly through the second movable block, and the second movable block can move relative to the second connector;

[0014] The top of the fixed block is obliquely connected to one end of a third connector, and the other end of the third connector obliquely passes through the second movable block, and the second movable block can move relative to the third connector;

[0015] A transmission assembly is provided on one side of the first shelf, and the two sides of the transmission assembly are sleeved on the corresponding first connectors and drive the first connectors to rotate.

[0016] The second shelf is connected to the corresponding second movable block on both sides.

[0017] Furthermore, when the transmission assembly drives the first connecting member to rotate, the first moving block drives the second connecting member to move relative to the first connecting member, causing the second moving block to move relative to the second connecting member, and the second moving block to move relative to the third connecting member, causing the second moving block to drive the second shelf to move relative to the first shelf.

[0018] Furthermore, the first movable block has a threaded through hole on the side facing the fixed block, and the first connector has an external thread at the end away from the fixed block; the portion of the first connector with the external thread is threadedly connected to the threaded through hole.

[0019] Furthermore, the transmission assembly includes a base, an annular synchronous belt, and a handle;

[0020] One side of the first shelf located between the two fixed blocks is connected to the top of the base. The base has a first through hole in the middle, through which the timing belt passes, and both sides of the timing belt are sleeved on the corresponding first connector.

[0021] The bottom of the base is provided with a first groove corresponding to the timing belt;

[0022] The handle passes through the first slide groove and is fixedly connected to the side of the timing belt facing away from the first shelf. The handle can slide in the first slide groove, and at the same time, the handle drives the timing belt to rotate, and the timing belt then drives the first connecting member to rotate.

[0023] Furthermore, the inner side of the synchronous belt is uniformly provided with tooth-shaped portions;

[0024] Each of the first connectors has teeth at the point where it engages with the timing belt, and these teeth mesh with the toothed portion.

[0025] Furthermore, the handle includes a push-pull block, a fixed cavity, and a sliding plate;

[0026] A push-pull block is provided in the middle of one side of the sliding plate, and a fixing cavity is provided in the middle of the other side of the sliding plate;

[0027] The synchronous belt passes through the fixing cavity on the side facing away from the first shelf, and the synchronous belt located in the fixing cavity is fixedly connected to the fixing cavity.

[0028] Furthermore, each of the second movable blocks is provided with a crossbeam on the side facing the second shelf, and each of the crossbeams is provided with a second slide groove on the side facing the second shelf;

[0029] The side of the second shelf facing the second moving block is connected to the corresponding second slide.

[0030] Furthermore, the second shelf is rectangular in shape, and each of the two shelves has a second through hole near its four corners;

[0031] Each of the crossbeams has a slider at both ends of the second groove, and each slider can slide within the corresponding second groove;

[0032] Each of the second through holes is into which a fixing member is inserted, and each fixing member can be fixedly connected to the corresponding slider.

[0033] A refrigerator includes a synchronously lifting shelf device with manually stepless height adjustment as described in any one of the above claims.

[0034] Furthermore, the refrigerator includes a refrigerator liner, and the foam layer inside the horizontal side walls of the refrigerator liner is provided with corresponding lifting components. The horizontal sides of the refrigerator liner are fixedly connected to the two sides of the first shelf facing the lifting components, and the refrigerator liner is provided with a vertical third sliding groove for each slider.

[0035] The slider can slide along the corresponding third groove, thereby causing the second shelf to move relative to the first shelf.

[0036] Compared with the prior art, the present invention has at least the following beneficial effects:

[0037] The present invention uses a lifting component to raise and lower the second shelf relative to the first shelf, and the height adjustment range between the first shelf and the second shelf is large; in addition, the lifting component can support the second shelf, thereby improving the load-bearing capacity of the second shelf. When a heavy item is placed on the second shelf, the lifting component can still keep the second shelf rising and lowering synchronously and stably relative to the first shelf. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a manually adjustable, stepless, synchronously lifting shelf device according to the present invention.

[0040] Figure 2 This is a schematic diagram of another structure of the synchronous lifting shelf device with manual stepless height adjustment according to the present invention;

[0041] Figure 3 for Figure 2 Enlarged schematic diagram of reference numeral A in the attached figure;

[0042] Figure 4 This is a schematic diagram of the connection relationship between the crossbeam and the second shelf in this invention, where a is a schematic diagram of the connection structure between the crossbeam and the second shelf, and b is an exploded schematic diagram of the crossbeam and the second shelf.

[0043] Figure 5 This is an enlarged schematic diagram of the handle structure in this invention;

[0044] Figure 6 This is an enlarged schematic diagram of the structure of the first movable block in this invention;

[0045] Figure 7 This is a schematic diagram of the refrigerator structure of the present invention;

[0046] Figure 8 for Figure 7 Enlarged schematic diagram of reference numeral B in the attached figure (without boss);

[0047] Figure 9 This is an enlarged schematic diagram of the third sliding groove portion with a boss in this invention.

[0048] Figure label:

[0049] 1. First shelf;

[0050] 2. Second shelf;

[0051] 21. Slider; 211. Head; 212. Protrusion; 213. Fixing groove;

[0052] 22. Fasteners;

[0053] 23. Second through hole;

[0054] 3. Lifting assembly;

[0055] 31. Fixed block;

[0056] 32. First moving block; 321. Threaded through hole;

[0057] 33. Second moving block;

[0058] 34. First connecting part; 341. External threaded part; 342. Gear tooth;

[0059] 35. Second connector;

[0060] 36. Third connector;

[0061] 37. Crossbeam; 371. Second slide rail;

[0062] 4. Transmission components;

[0063] 41. Base; 411. First through hole; 412. First sliding groove;

[0064] 42. Synchronous belt; 421. Toothed portion;

[0065] 43. Handle; 431. Push-pull block; 432. Fixed cavity; 433. Sliding plate; 434. Gear;

[0066] 5. Refrigerator liner;

[0067] 51. Third chute;

[0068] 52. convex platform. Detailed Implementation

[0069] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Therefore, a feature pointed out in this specification is used to illustrate one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0070] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0071] In this embodiment, refer to the appendix. Figure 1-2 The left and right directions are the X-axis, the up and down or vertical directions are the Y-axis, and the forward and backward directions are the Z-axis.

[0072] As one embodiment, refer to the appendix Figure 1-6 This invention proposes a manually adjustable, stepless, synchronously lifting shelf device, comprising a first shelf 1, a second shelf 2, a lifting assembly 3, and a transmission assembly 4; the two sides of the first shelf 1 are connected to the lower part of the lifting assembly 3, and the two sides of the second shelf 2 are connected to the upper part of the lifting assembly 3; the transmission assembly 4 is provided on the side of the first shelf 1 facing away from the second shelf 2, and the transmission assembly 4 can drive the lifting assembly 3 to move up and down, thereby driving the second shelf 2 to move up and down relative to the first shelf 1.

[0073] Specifically, when the transmission component 4 moves to the left, it drives the lifting component 3 to descend, causing the lifting component 3 to lower the second shelf 2 relative to the first shelf 1. Conversely, when the transmission component 4 moves to the right, it drives the lifting component 3 to rise, causing the lifting component 3 to rise the second shelf 2 relative to the first shelf 1.

[0074] In this invention, the second shelf 2 is raised and lowered relative to the first shelf 1 via the lifting component 3, and the height adjustment range between the first shelf 1 and the second shelf 2 is relatively large, preferably 109mm-270mm. Of course, the height adjustment range of the shelf device of this invention can be increased according to the actual needs of the user, so that items of different heights can be placed on the first shelf 1. Furthermore, a lifting component 3 is provided on both sides of the first shelf 1 and the second shelf 2. The lifting component 3 can support the second shelf 2, thereby improving the load-bearing capacity of the second shelf 2. Even when heavy items are placed on the second shelf 2, the lifting component 3 can keep the second shelf 2 rising and falling synchronously and stably relative to the first shelf 1.

[0075] Specifically, refer to the appendix Figure 1 The lifting assembly 3 includes a fixed block 31, a first moving block 32, a second moving block 33, a first connecting member 34, a second connecting member 35, and a third connecting member 36.

[0076] The first connecting member 34 is preferably a lead screw, and the second connecting member 35 and the third connecting member 36 are both preferably cylindrical guide rails. The shapes of the fixed block 31, the first moving block 32 and the second moving block 33 are preferably square blocks, but the shapes of the fixed block 31, the first moving block 32 and the second moving block 33 can also be adjusted to other shapes that will not hinder the lifting assembly 3 from lifting according to production needs.

[0077] One side of the fixed block 31 is rotatably connected to one end of the first connector 34, and the other end of the first connector 34 passes horizontally through the first movable block 32, and the first movable block 32 can move relative to the first connector 34.

[0078] One end of the second connector 35 is vertically connected to the top of the first moving block 32, and the other end of the second connector 35 passes vertically through the second moving block 33, and the second moving block 33 can move relative to the second connector 35.

[0079] The top of the fixed block 31 is obliquely connected to one end of the third connector 36, and the other end of the third connector 36 obliquely passes through the second movable block 33, and the second movable block 33 can move relative to the third connector 36.

[0080] A transmission assembly 4 is provided on one side of the first shelf 1. The two sides of the transmission assembly 4 are sleeved on the corresponding first connector 34 and drive the first connector 34 to rotate.

[0081] The second shelf 2 is connected to the corresponding second moving block 33 on both sides.

[0082] When the transmission component 4 moves to the left, it drives the first connecting member 34 to rotate to the left. This causes the first moving block 32, along with the second connecting member 35, to move closer to the fixed block 31 along the first connecting member 34. This causes the second moving block 33 to move closer to the fixed block 31 along the second connecting member 35. The second moving block 33 then moves closer to the fixed block 31 along the third connecting member 36. This causes the second moving block 33 to descend as a whole, which in turn causes the second moving block 33 to lower the second shelf 2 relative to the first shelf 1.

[0083] When the transmission component 4 moves to the right, it will drive the first connecting member 34 to rotate to the right. This will cause the first moving block 32 to move away from the fixed block 31 along the first connecting member 34, and the second moving block 33 to move away from the fixed block 31 along the second connecting member 35. The second moving block 33 will move away from the fixed block 31 along the third connecting member 36, causing the second moving block 33 to rise as a whole. This will cause the second moving block 33 to rise relative to the first shelf 1 along with the second shelf 2.

[0084] Of course, due to the size limitation of the second moving block 33 itself, the second shelf 2 cannot fit snugly with the first shelf 1, and there is always a certain space between the first shelf 1 and the second shelf 2.

[0085] The third connector 36 is fastened to the fixing block 31 at a fixed angle. When the angle between the third connector 36 and the fixing block 31 is less than 45°, the height adjustment range of the second shelf 2 relative to the first shelf 1 is small. When the angle between the third connector 36 and the fixing block 31 is greater than 45°, the height adjustment range of the second shelf 2 relative to the first shelf 1 is large.

[0086] Among them, refer to the appendix Figure 1 and 6 The first movable block 32 has a threaded through hole 321 on the side facing the fixed block 31, and the first connecting member 34 has an external threaded portion 341 at the end away from the fixed block 31; the portion of the first connecting member 34 with the external threaded portion 341 is threadedly connected to the threaded through hole 321. Therefore, when the first connecting member 34 rotates, the external threaded portion 341 and the threaded through hole 321 will rotate, thereby causing the first movable block 32 to make a reciprocating linear motion on the first connecting member 34. Moreover, the threaded connection between the first movable block 32 and the first connecting member 34 can restrict the displacement of the second movable block 33 when the first connecting member 34 is not rotating. That is, when the first movable block 32 does not move relative to the first connecting member 34, the second movable block 33 will not move relative to the first movable block 32 either.

[0087] Among them, refer to the appendix Figure 1 The transmission assembly 4 includes a base 41, an annular synchronous belt 42, and a handle 43.

[0088] One side of the first shelf 1 located between the two fixed blocks 31 is connected to the top of the base 41. The base 41 has a first through hole 411 in the middle. The synchronous belt 42 passes through the first through hole 411, and both sides of the synchronous belt 42 are sleeved on the corresponding first connector 34. The shape of the first through hole 411 is preferably square, but it can also be adjusted to a circle or other shape suitable for the synchronous belt 42 to pass through without hindering the smooth sliding of the synchronous belt 42, according to production needs.

[0089] Of course, the transmission component 4 can be used not only for synchronous belt drives, but also for bevel gear drives, helical gear drives, etc. Since bevel gear drives and helical gear drives are conventional existing technologies, they will not be elaborated here.

[0090] The bottom of the base 41 is provided with a first groove 412 corresponding to the timing belt 42; the handle 43 passes through the first groove 412 and is fixedly connected to the side of the timing belt 42 facing away from the first shelf 1, and the handle 43 can slide in the first groove 412. At the same time, the handle 43 drives the timing belt 42 to drive, and the timing belt 42 then drives the first connecting member 34 to rotate.

[0091] When the user needs to adjust the distance between the first shelf 1 and the second shelf 2, the user first holds or pinches the handle 43 and pushes the handle 43 slightly along one side (preferably the right side) of the first slide groove 412. The handle 43 then drives the timing belt 42 to the right, and the timing belt 42 then drives the first connecting member 34 to rotate to the right, thereby causing the second shelf 2 to rise relative to the first shelf 1, resulting in a larger distance between the first shelf 1 and the second shelf 2.

[0092] Similarly, if the user applies a little force to move the handle 43 along the other side (preferably the left side) of the first slide groove 412, the handle 43 will drive the timing belt 42 to the left, and the timing belt 42 will drive the first connecting member 34 to rotate to the left, thereby causing the second shelf 2 to descend relative to the first shelf 1, resulting in a smaller distance between the first shelf 1 and the second shelf 2.

[0093] In order to make the timing belt 42 better drive the first connecting member 34 to rotate, refer to the attached document. Figure 2-3This invention proposes an embodiment in which the inner side of the synchronous belt 42 is uniformly provided with toothed portions 421; each of the first connecting members 34 and the synchronous belt 42 has a gear tooth 342 at the engagement point, which meshes with the toothed portions 421. Thus, when the synchronous belt 42 rotates, the meshing of the gear tooth 342 with the toothed portions 421 causes the synchronous belt 42 to drive the first connecting member 34 to rotate.

[0094] To ensure that when the user pushes the handle 43, the handle 43 can better drive the synchronous belt 42, refer to the attached document. Figure 1 and 5 The present invention proposes an embodiment in which the handle 43 includes a push-pull block 431, a fixed cavity 432 and a sliding plate 433, wherein the push-pull block 431 is provided in the middle of one side of the sliding plate 433 and the fixed cavity 432 is provided in the middle of the other side of the sliding plate 433; the synchronous belt 42 passes through the fixed cavity 432 on the side facing away from the first shelf 1, and the synchronous belt 42 located in the fixed cavity 432 is fixedly connected to the fixed cavity 432.

[0095] The fixed cavity 432 passes through the first slide groove 412 and is fixedly connected to the synchronous belt 42. The side of the sliding plate 433 with the fixed cavity 432 is connected to the surface of the first slide groove 412, and the sliding plate 433 can slide on the surface of the first slide groove 412, so that the handle 43 can drive the synchronous belt 42 more smoothly. The specific connection relationship between the fixed cavity 432 and the synchronous belt 42 is as follows: the top of the fixed cavity 432 is provided with teeth 434. When the side of the synchronous belt 42 facing away from the first shelf 1 passes through the fixed cavity 432, the toothed part 421 of the synchronous belt 42 located in the fixed cavity 432 meshes with the teeth 434. Because the space of the fixed cavity 432 is limited, the fixed cavity 432 and the synchronous belt 42 in the fixed cavity 432 are tightly squeezed, so that the handle 43 is better fixed on the synchronous belt 42.

[0096] Furthermore, when the shelf device of the present invention is in the initial state, the handle 43 should be in the middle position on the side of the synchronous belt 42 facing away from the first shelf 1. The distance between the first shelf 1 and the second shelf 2 is preferably 190mm, so that the handle 43 can slide left and right, thereby adjusting the lifting and lowering of the second shelf 2 relative to the first shelf 1.

[0097] Referring to Appendix 1-2, the connection between the second shelf 2 and the lifting assembly 3 is as follows: each of the second moving blocks 33 has a crossbeam 37 on the side facing the second shelf 2, and each crossbeam 37 has a second slide groove 371 on the side facing the second shelf 2; the side of the second shelf 2 facing the second moving block 33 is connected to the corresponding second slide groove 371. In this way, the lifting assembly 3 can easily drive the second shelf 2 to move up and down synchronously relative to the first shelf 1, and can also provide support for the second shelf 2, improving the load-bearing capacity of the second shelf 2 so as to place heavier items.

[0098] Among them, refer to the appendix Figure 2 and 4 When the second shelf 2 is raised or lowered, it will move relative to the second slide groove 371. Therefore, this invention proposes an embodiment in which the second shelf 2 is rectangular and has second through holes 23 near its four corners. Each of the second slide grooves 371 of each beam 37 has sliders 21 at both ends, and each slider 21 can slide within its corresponding second slide groove 371. Each second through hole 23 has a fixing member 22 inserted into it, and each fixing member 22 can be fixedly connected to its corresponding slider 21. The fixing member 22 is preferably a pin, the second slide groove 371 is preferably an "U"-shaped groove, and the slider 21 is preferably a T-shaped slider. (Refer to the attached diagram.) Figure 4 The head 211 of the slider 21 extends into the second slide groove 371 and slides relative to the second slide groove 371. The middle part of the protrusion 212 of the slider 21 is provided with a fixing groove 213. In this way, the four corners of the second shelf 2 are fixedly connected to the fixing groove 213 of the corresponding slider 21 by a fixing member 22. So when the second shelf 2 is raised or lowered, the slider 21 can slide the second shelf 2 in the corresponding second slide groove 371.

[0099] In this embodiment, refer to the appendix. Figure 7-9 The present invention also proposes a refrigerator, including the synchronous lifting shelf device with manual stepless height adjustment as described in any one of the above.

[0100] In order to enable the synchronous lifting shelf device of the present invention to be used inside a refrigerator, please refer to the attached drawing. Figure 7 The present invention proposes an embodiment in which the refrigerator includes a refrigerator liner 5. The foam layers in the horizontal side walls of the refrigerator liner 5 are provided with corresponding lifting components 3. The horizontal sides of the refrigerator liner 5 are fixedly connected to the sides of the first shelf 1 facing the lifting components 3. The refrigerator liner 5 is provided with a vertical third slide groove 51 for each slider 21. The slider 21 can slide along the corresponding third slide groove 51, thereby driving the second shelf 2 to move relative to the first shelf 1.

[0101] Of course, to improve assembly efficiency, the lifting assembly 3 can also be directly installed on both sides of the refrigerator inner liner 5, without first hollowing out the foam layer before placing the lifting assembly 3. However, regardless of whether the lifting assembly 3 is installed inside the foam layer or inside the refrigerator inner liner 5, the first moving block 32 and the second moving block 33 will not detach from their corresponding first connecting member 34, second connecting member 35, and third connecting member 36 due to the restriction of the refrigerator side wall, thus affecting the normal use of the shelf device of the present invention.

[0102] Among them, refer to the appendix Figure 8-9 To enhance the aesthetics of the refrigerator liner 5, the third sliding groove 51 within the liner 5 needs to be concealed. The preferred concealment method is a protrusion 52, specifically a protrusion 52 located along the outer edge of the third sliding groove 51, thus blocking it and preventing the user from seeing it during use. Furthermore, because the second shelf 2 needs to be raised and lowered, there is a certain space between the second shelf 2 and the side wall of the refrigerator liner 5. The protrusion 52 is placed within this space to prevent it from obstructing the raising and lowering of the second shelf 2.

[0103] When the user pushes the handle 43 to the right, the handle 43 drives the synchronous belt 42 to rotate to the right. The synchronous belt 42 drives the first connecting member 34 to rotate to the right, which in turn causes the first moving block 32, along with the second connecting member 35, to move away from the fixed block 31 along the first connecting member 34. This causes the second moving block 33 to move away from the fixed block 31 along the second connecting member 35, and then away from the fixed block 31 along the third connecting member 36. As a result, the second moving block 33 rises as a whole, and then the second moving block 33, along with the second shelf 2, rises relative to the first shelf 1. At the same time, the slider 21 moves upward along the third slide groove 51. Because the slider 21 is restricted by the third slide groove 51, the slider 21 can only slide up and down within the third slide groove 51 with the second shelf 2. Therefore, the second shelf 2 will not move forward or backward relative to the first shelf 1 (forward or backward here refers to the Z-axis direction). Instead, the second slide groove 371 moves relative to the slider 21, at which point the second moving block 33 will move closer to the slider 21.

[0104] Similarly, when the user pushes the handle 43 to the left, the handle 43 drives the synchronous belt 42 to the left, and the synchronous belt 42 drives the first connecting member 34 to rotate to the left. This causes the first moving block 32 to move along the first connecting member 34 and move the second connecting member 35 closer to the fixed block 31. This causes the second moving block 33 to move along the second connecting member 35 and move along the third connecting member 36 and move closer to the fixed block 31. This causes the second moving block 33 to descend as a whole. The second moving block 33 then moves the second shelf 2 down relative to the first shelf 1. At the same time, the slider 21 moves down along the third slide groove 51. The second slide groove 371 will move up and down relative to the slider 21. At this time, the second moving block 33 will move away from the slider 21.

[0105] Therefore, after the manual stepless height-adjustable synchronous lifting shelf device of the present invention is installed in the refrigerator, the height adjustment range of the shelf device is large. The user can adjust the distance between the first shelf 1 and the second shelf 2 by pushing and pulling the handle 43 left and right, so as to place items of different heights on the first shelf 1. Moreover, since a lifting component 3 is provided on both sides of the first shelf 1 and the second shelf 2, the lifting component 3 can support the second shelf 2, thereby improving the load-bearing capacity of the second shelf 2. Even when a heavy item is placed on the second shelf 2, the lifting component 3 can keep the second shelf 2 moving synchronously and stably relative to the first shelf 1.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manually adjustable, stepless, synchronously lifting shelf device, characterized in that: It includes a first shelf (1), a second shelf (2), a lifting assembly (3), and a transmission assembly (4). The two sides of the first shelf (1) are connected to the lower part of the lifting assembly (3), and the two sides of the second shelf (2) are connected to the upper part of the lifting assembly (3). The first shelf (1) is provided with a transmission assembly (4) on the side facing away from the second shelf (2). The transmission assembly (4) can drive the lifting assembly (3) to move up and down, and then the lifting assembly (3) drives the second shelf (2) to move up and down relative to the first shelf (1). The lifting assembly (3) includes a fixed block (31), a first moving block (32), a second moving block (33), a first connector (34), a second connector (35), and a third connector (36). One side of the fixed block (31) is rotatably connected to one end of the first connector (34), the other end of the first connector (34) passes horizontally through the first movable block (32), and the first movable block (32) can move relative to the first connector (34); One end of the second connector (35) is vertically connected to the top of the first moving block (32), and the other end of the second connector (35) passes vertically through the second moving block (33), and the second moving block (33) can move relative to the second connector (35); The top of the fixed block (31) is obliquely connected to one end of the third connector (36), and the other end of the third connector (36) obliquely passes through the second movable block (33), and the second movable block (33) can move relative to the third connector (36); The first shelf (1) is provided with a transmission assembly (4) on one side. The two sides of the transmission assembly (4) are sleeved on the corresponding first connector (34) and drive the first connector (34) to rotate. The second shelf (2) is connected to the corresponding second moving block (33) on both sides.

2. The manually adjustable stepless height synchronous lifting shelf device according to claim 1, characterized in that: The first movable block (32) has a threaded through hole (321) on the side facing the fixed block (31), and the first connector (34) has an external thread (341) at the end away from the fixed block (31); the part of the first connector (34) with the external thread (341) is threadedly connected to the threaded through hole (321).

3. The manually adjustable stepless height synchronous lifting shelf device according to claim 1, characterized in that: The transmission assembly (4) includes a base (41), an annular synchronous belt (42), and a handle (43). One side of the first shelf (1) located between the two fixed blocks (31) is connected to the top of the base (41). The base (41) has a first through hole (411) in the middle. The timing belt (42) passes through the first through hole (411), and both sides of the timing belt (42) are sleeved on the corresponding first connector (34). The bottom of the base (41) is provided with a first groove (412) corresponding to the timing belt (42). The handle (43) passes through the first slide groove (412) and is fixedly connected to the side of the synchronous belt (42) facing away from the first shelf (1). The handle (43) can slide in the first slide groove (412). At the same time, the handle (43) drives the synchronous belt (42) to drive, and the synchronous belt (42) then drives the first connector (34) to rotate.

4. The manually stepless height-adjustable synchronous lifting shelf device according to claim 3, characterized in that: The inner side of the synchronous belt (42) is uniformly provided with toothed portions (421). Each of the first connectors (34) has a tooth (342) at the point where it engages with the timing belt (42), and the tooth (342) meshes with the toothed portion (421).

5. The manually stepless height-adjustable synchronous lifting shelf device according to claim 3, characterized in that: The handle (43) includes a push-pull block (431), a fixed cavity (432), and a sliding plate (433). A push-pull block (431) is provided in the middle of one side of the sliding plate (433), and a fixing cavity (432) is provided in the middle of the other side of the sliding plate (433). The synchronous belt (42) passes through the fixed cavity (432) on the side facing away from the first shelf (1), and the synchronous belt (42) located in the fixed cavity (432) is fixedly connected to the fixed cavity (432).

6. The manually stepless height-adjustable synchronous lifting shelf device according to claim 1, characterized in that: Each of the second moving blocks (33) is provided with a crossbeam (37) on the side facing the second shelf (2), and each of the crossbeams (37) is provided with a second groove (371) on the side facing the second shelf (2). The side of the second shelf (2) facing the second moving block (33) is connected to the corresponding second slide (371).

7. The manually stepless height-adjustable synchronous lifting shelf device according to claim 6, characterized in that: The second shelf (2) is rectangular and has a second through hole (23) near each of the four corners. Each of the crossbeams (37) has a slider (21) at both ends of the second groove (371), and each slider (21) can slide in the corresponding second groove (371); Each of the second through holes (23) is inserted with a fastener (22), and each fastener (22) can be fixedly connected to the corresponding slider (21).

8. A refrigerator, characterized in that: Includes the manually adjustable, stepless height synchronous lifting shelf device as described in any one of claims 1-7.

9. The refrigerator according to claim 8, characterized in that: The refrigerator includes a refrigerator liner (5), and the foam layer inside the horizontal side walls of the refrigerator liner (5) is provided with corresponding lifting components (3). The horizontal sides of the refrigerator liner (5) are fixedly connected to the sides of the first shelf (1) facing the lifting components (3), and the refrigerator liner (5) is provided with a vertical third slide groove (51) for each slider (21). The slider (21) can slide along the corresponding third slide groove (51), thereby driving the second shelf (2) to move relative to the first shelf (1).

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