Driving assembly, rack and refrigerator

Abstract

The utility model relates to the technical field of refrigerators, and discloses a driving assembly which comprises a driving gear, a first driving assembly, a second driving assembly and a third driving assembly. The web plate of the driving gear is provided with a groove, and the groove forms a first track when rotating along with the driving gear; the microswitch comprises a moving part, a spring part and a triggering part; wherein the moving part is positioned on one side of the groove; the spring part is used for providing elastic force for the moving part so that the moving part can be located on the first track all the time. A second track is formed when the moving part moves under the action of the elastic force, and the triggering part is located on the second track; moreover, when the moving part is sunk into the groove, the moving part is in contact with the triggering part, so that the triggering part is triggered; and the controller is configured to control the rotating state of the driving gear according to a triggering signal of the triggering part. The utility model further discloses a rack and a refrigerator.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, for example, to a drive assembly, a shelf and a refrigerator. Background Art

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature and is used to keep food or other items at a constant low temperature.

[0003] Related art discloses a refrigerator equipped with a liftable shelf. The shelf comprises a shelf body, a pull cord, a drive motor, a winding wheel assembly, and a slide rail assembly. The first end of the pull cord is connected to a fixed assembly, which is mounted on the slide rail assembly. The second end of the pull cord is connected to the winding wheel assembly. Furthermore, the drive motor is used to rotate the winding wheel assembly. Rotation of the winding wheel assembly, via the pull cord, drives the shelf body up and down along the slide rail assembly.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] The rotation state of the drive motor is difficult to control accurately, and there is a risk that the lifting distance of the shelf may exceed the limit.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a drive assembly, a shelf, and a refrigerator, which solve the problem that the rotation state of a drive motor is difficult to accurately control.

[0009] In some embodiments, the drive assembly includes:

[0010] A driving gear, wherein a groove is provided on the web of the driving gear, and the groove forms a first track when the driving gear rotates;

[0011] A micro switch comprises a moving portion, a spring portion, and a trigger portion; wherein the moving portion is located on one side of a groove; the spring portion is used to provide elastic force to the moving portion so that the moving portion is always located on a first track; when the moving portion moves under the elastic force, a second track is formed, and the trigger portion is located on the second track; and when the moving portion is immersed in the groove, the moving portion contacts the trigger portion, causing the trigger portion to be triggered;

[0012] The controller is configured to control the rotation state of the driving gear according to the trigger signal of the trigger part.

[0013] Optionally, the moving part includes:

[0014] a protruding piece corresponding to the groove;

[0015] The cantilever member is connected to the protruding member and corresponds to the triggering portion.

[0016] Optionally, the drive assembly further includes:

[0017] A limiting groove is provided on one side of the groove and extends along the second track; a through opening is provided on the groove wall of the limiting groove along its extending direction;

[0018] The protruding piece is arranged in the limiting groove and can move along the limiting groove; the cantilever piece extends out of the limiting groove through the through opening and can move along the through opening.

[0019] Optionally, the spring portion is disposed in the limiting groove, and a first end of the spring portion is connected to the limiting groove, and a second end of the spring portion is connected to the protruding piece.

[0020] Optionally, the protruding piece is provided with a receiving groove, and the second end of the spring portion is connected to the receiving groove.

[0021] Optionally, slope surfaces are provided on both sides of the groove to facilitate the moving part to enter and exit the groove.

[0022] Optionally, the drive assembly further includes:

[0023] The fixing plate is arranged on one side of the micro switch and is used for installing the trigger part.

[0024] In some embodiments, the rack includes the drive assembly.

[0025] Optionally, the rack further comprises:

[0026] The shelf body is movable along the slide rail assembly;

[0027] The winding wheel assembly, the driving gear is used to drive the winding wheel assembly to rotate;

[0028] The pull rope assembly and the winding wheel assembly drive the shelf body to move through the pull rope assembly;

[0029] Furthermore, when the controller receives the trigger signal from the trigger unit, it controls the driving gear to stop rotating or reverse rotating, thereby controlling the shelf body to stop moving or reverse moving.

[0030] In some embodiments, the refrigerator includes the shelf.

[0031] The drive assembly, shelf, and refrigerator provided by the embodiments of the present disclosure can achieve the following technical effects:

[0032] When the driving gear rotates, the groove is driven to rotate synchronously, and a first track is formed when the groove rotates. Under the action of the spring part, the moving part is always located on the first track. When the groove rotates to a position corresponding to the moving part, the moving part sinks into the groove, and a second track is formed when the moving part moves. At this time, the moving part contacts the trigger part, causing the trigger part to be triggered. In addition, after receiving the trigger signal, the controller controls the rotation state of the driving gear, such as stopping or reversing. In this way, through the ingenious structural design, an accurate triggering and response mechanism is formed, which facilitates the efficient control of the rotation state of the drive component.

[0033] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0035] Figure 1 is a schematic structural diagram of a shelf provided by an embodiment of the present disclosure;

[0036] Figure 2 is a structural diagram of a moving part provided by an embodiment of the present disclosure;

[0037] Figure 3 is a schematic structural diagram of a groove provided in an embodiment of the present disclosure;

[0038] Figure 4 It is a schematic structural diagram of the limiting groove provided in an embodiment of the present disclosure;

[0039] Figure 5 is an exploded schematic diagram of a motor housing provided by an embodiment of the present disclosure;

[0040] Figure 6 is a schematic structural diagram of a shock-absorbing pad provided in an embodiment of the present disclosure;

[0041] Figure 7 1 is a schematic structural diagram of a claw portion and a positioning portion provided in an embodiment of the present disclosure;

[0042] Figure 8 is an exploded schematic diagram of a slide rail assembly provided in an embodiment of the present disclosure;

[0043] Figure 9 is a schematic diagram of the position of the limit opening provided in an embodiment of the present disclosure;

[0044] Figure 10 It is a structural schematic diagram of the gap provided in an embodiment of the present disclosure.

[0045] Reference numerals:

[0046] 100, driving gear; 110, web; 111, groove; 112, sloped surface; 120, moving portion; 121, protruding member; 122, cantilever member; 123, accommodating groove; 130, spring portion; 140, triggering portion; 141, fixing plate; 150, limiting groove; 151, through-opening;

[0047] 200, motor housing; 201, back plate; 202, front cover; 210, claw portion; 211, first claw section; 212, second claw section; 213, positioning portion; 220, mounting plate; 221, slot; 222, jack; 230, shock-absorbing pad; 231, first avoidance opening; 232, second avoidance opening;

[0048] 300, slide rail body; 301, guide groove; 310, fixing assembly; 311, insert; 312, fixing screw; 313, limit opening; 320, notch; 321, first edge; 322, second edge; 330, pull rope;

[0049] 400, shelf body; 410, winding wheel assembly; 420, movable pulley assembly. DETAILED DESCRIPTION

[0050] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0051] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that such terms are interchangeable where appropriate to describe the embodiments of the present disclosure. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0052] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0053] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0054] Unless otherwise stated, the term "plurality" means two or more.

[0055] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0056] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0057] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0058] Combine Figure 1-10 As shown, the embodiment of the present disclosure provides a refrigerator, the refrigerator includes a shelf, the shelf includes a shelf body 400, a slide rail assembly, a movable pulley assembly 420, a fixing assembly 310, a winding wheel assembly 410, and a driving assembly. Figure 1As shown, the shelf body 400 is connected to the movable pulley assembly 420, and the movable pulley assembly 420 is connected to the slide rail body 300 of the slide rail assembly. The fixing assembly 310 is provided on the slide rail body 300 and is used to fix the first end of the pull rope 330, and the second end of the pull rope 330 is connected to the winding wheel assembly 410. The driving assembly is used to drive the winding wheel assembly 410 to rotate, and the winding wheel assembly 410 winds or releases the pull rope 330 when it rotates. The movable pulley assembly 420 is provided on the pull rope 330. When the driving assembly drives the driving winding wheel assembly 410 to rotate, the length of the pull rope 330 changes, thereby driving the movable pulley assembly 420 to move along the pull rope 330, so that the movable pulley assembly 420 drives the shelf body 400 to move along the slide rail body 300.

[0059] In the first embodiment, the driving assembly includes a driving gear 100, a micro switch and a controller. The web 110 of the driving gear 100 is provided with a groove 111, and the groove 111 forms a first track when the driving gear 100 rotates; the micro switch includes a moving part 120, a spring part 130 and a trigger part 140; Figure 2 As shown, the moving part 120 is located on one side of the groove 111; the spring part 130 is used to provide elastic force to the moving part 120 so that the moving part 120 is always located on the first track; when the moving part 120 moves under the elastic force, a second track is formed, and the triggering part 140 is located on the second track; and, when the moving part 120 is trapped in the groove 111, the moving part 120 contacts the triggering part 140, so that the triggering part 140 is triggered; the controller is configured to control the rotation state of the driving gear 100 according to the trigger signal of the triggering part 140.

[0060] In this embodiment, when the driving gear 100 rotates, the groove 111 is driven to rotate synchronously, and a first track is formed when the groove 111 rotates. Under the action of the spring portion 130, the moving portion 120 is always located on the first track. When the groove 111 rotates to a position corresponding to the moving portion 120, the moving portion 120 sinks into the groove 111, and a second track is formed when the moving portion 120 moves. At this time, the moving portion 120 contacts the trigger portion 140, so that the trigger portion 140 is triggered. In addition, after receiving the trigger signal, the controller controls the rotation state of the driving gear 100, such as stopping or reversing. In this way, through ingenious structural design, an accurate triggering and response mechanism is formed, which facilitates efficient control of the rotation state of the drive component.

[0061] Alternatively, as Figure 2 As shown, the movable portion 120 includes a protruding member 121 and a cantilever member 122. The protruding member 121 corresponds to the groove 111; the cantilever member 122 is connected to the protruding member 121 and corresponds to the triggering portion 140. Thus, the protruding member 121 can be sunk into the groove 111. After sunk, the cantilever member 122 contacts the triggering portion 140, thereby triggering the triggering portion 140.

[0062] Alternatively, as Figure 4 As shown, the drive assembly also includes a limit groove 150, which is arranged on one side of the groove 111 and extends along the second track; the groove wall of the limit groove 150 is provided with a through opening 151 along its extension direction; wherein, the protrusion 121 is arranged in the limit groove 150 and can move along the limit groove 150; the cantilever member 122 extends out of the limit groove 150 through the through opening 151 and can move along the through opening 151.

[0063] In this embodiment, the limiting groove 150 serves to limit the moving trajectory of the protruding member 121, which is conducive to the protruding member 121 accurately sinking into the groove 111. The through hole 151 serves to guide the cantilever member 122, which is conducive to the cantilever member 122 accurately contacting the trigger portion 140.

[0064] Exemplarily, the limiting groove 150 is formed by being bounded by four plate segments on the back plate 201 of the motor housing 200 , and is in the shape of a rectangle that matches the protruding piece 121 .

[0065] Alternatively, as Figure 2 As shown, the spring portion 130 is disposed in the limiting groove 150, with a first end of the spring portion 130 connected to the limiting groove 150 and a second end connected to the protruding member 121. In this way, the limiting groove 150 serves to accommodate the spring portion 130, ensuring that the elastic force of the spring portion 130 can stably act on the protruding member 121.

[0066] For example, when other positions on the web 110 of the driving gear 100 contact the protrusion 121, the spring portion 130 is in an elastic energy storage state. When the driving gear 100 rotates until the groove 111 corresponds to the protrusion 121, the spring portion 130 releases its elastic force, pushing the protrusion 121 into the groove 111.

[0067] Optionally, the protruding piece 121 is provided with a receiving groove 123, and the second end of the spring portion 130 is connected to the receiving groove 123. In this way, under the action of the receiving groove 123, the connection stability between the spring portion 130 and the protruding piece 121 is improved.

[0068] For example, Figure 3 As shown, the receiving groove 123 is configured as a cylinder, and the diameter of the receiving groove 123 is adapted to the diameter of the spring.

[0069] Alternatively, as Figure 3 As shown, sloped surfaces 112 are provided on both sides of the groove 111 to facilitate the moving portion 120 to enter and exit the groove 111. In this way, under the action of the sloped surfaces 112, it is ensured that the moving portion 120 can smoothly enter or leave the groove 111, reducing the jamming phenomenon.

[0070] Alternatively, as Figure 4 As shown, the drive assembly further includes a fixing plate 141. The fixing plate 141 is provided on one side of the micro switch for mounting the trigger portion 140. In this way, the fixing plate 141 is utilized to provide a mounting position for the trigger portion 140.

[0071] Exemplarily, the fixing plate 141 is disposed on the back plate 201 of the motor housing 200 .

[0072] Optionally, the rack includes the above-mentioned drive assembly.

[0073] Alternatively, as Figure 1 As shown, the rack also includes a rack body 400, a winding wheel assembly 410, and a pull rope assembly. The rack body 400 is movable along the rail assembly; the drive gear 100 is used to drive the winding wheel assembly 410 to rotate; the winding wheel assembly 410 drives the rack body 400 to move via the pull rope assembly; and when the controller receives a trigger signal, it controls the drive gear 100 to stop or reverse rotation, thereby controlling the rack body 400 to stop or reverse movement.

[0074] For example, the rail body 300 of the rail assembly is arranged vertically, and the shelf body 400 can rise or fall along the rail body 300. When the drive gear 100 rotates clockwise, the reel assembly 410 winds the pull rope 330, and the pull rope 330 becomes shorter and pulls the shelf body 400 up. When the drive gear 100 rotates to the trigger position, the moving part 120 falls into the groove 111, and the trigger part 140 is triggered. When the controller receives the trigger signal, it controls the drive gear 100 to stop, and the shelf body 400 rises to the limit position and no longer continues to rise. Alternatively, when the controller receives the trigger signal, it controls the drive gear 100 to reverse a certain stroke, so that the shelf body 400 does not stay at the limit position and descends a certain distance. In this way, the shelf body 400 can be prevented from moving excessively upward.

[0075] As another example, when the drive gear 100 rotates counterclockwise, the reel assembly 410 releases the pull cord 330, causing the pull cord 330 to lengthen and the shelf body 400 to descend. When the drive gear 100 rotates to the trigger position, the movable portion 120 sinks into the groove 111, triggering the trigger portion 140. Upon receiving the trigger signal, the controller controls the drive gear 100 to stop rotating, causing the shelf body 400 to descend to its limit position and cease further descent. This prevents the shelf body 400 from excessive downward movement.

[0076] Optionally, the refrigerator includes the above-mentioned shelf. In this way, the user can adjust the position of the shelf through the drive assembly according to needs, thereby facilitating the storage and retrieval of items in the refrigerator.

[0077] In the second embodiment, the drive assembly includes a motor housing 200, a mounting plate 220, and a shock absorbing pad 230. Figure 5 As shown, the motor housing 200 includes a back plate 201, and a first side of the back plate 201 is provided with a claw portion 210 and a positioning portion 213; the mounting plate 220 is located on the first side of the back plate 201, and is provided with a slot 221 and a socket 222; wherein, the slot 221 corresponds to the claw portion 210, and the socket 222 corresponds to the positioning portion 213; the shock-absorbing pad 230 is located between the back plate 201 and the mounting plate 220, and is provided with a first avoidance opening 231 and a second avoidance opening 232; and, the claw portion 210 passes through the first avoidance opening 231 and is engaged in the slot 221, and the positioning portion 213 passes through the second avoidance opening 232 and is plugged into the socket 222.

[0078] In this embodiment, when installing the drive assembly, the claw portion 210 is first passed through the first avoidance opening 231 and the positioning portion 213 is passed through the second avoidance opening 232, that is, the shock-absorbing pad 230 is assembled to the back plate 201. The positioning portion 213 is then inserted into the insertion hole 222 and the claw portion 210 is engaged with the slot 221. At this time, the back plate 201 is fixed to the mounting plate 220, and the shock-absorbing pad 230 is located between the two. In this way, the positioning and preliminary fixation between the motor housing 200 and the mounting plate 220 are completed, and the motor housing 200 can be further fixed to the mounting plate 220 using screw fasteners without manual support, effectively improving installation efficiency.

[0079] Optionally, the back plate 201 and the front cover 202 jointly enclose the motor housing 200 , and the winding wheel assembly 410 is located on a side of the front cover 202 away from the back plate 201 .

[0080] Alternatively, as Figure 6 As shown, the claw portion 210 includes a first claw segment 211 and a second claw segment 212. The first end of the first claw segment 211 is connected to the back plate 201, and its second end extends toward the mounting plate 220. The first end of the second claw segment 212 is connected to the second end of the first claw segment 211, and its second end extends perpendicular to the first claw segment 211. Thus, the connection design between the first claw segment 211 and the second claw segment 212 forms a stable clamping structure for the entire claw portion 210.

[0081] Optionally, the second end of the second claw section 212 is configured to be pointed. In this way, the pointed design enables the second claw section 212 to pass through the first avoidance opening 231 more smoothly and be more conveniently inserted into the slot 221.

[0082] Alternatively, as Figure 7As shown, the two claw portions 210 are respectively provided on both sides of the upper portion of the back plate 201, and the second end of the second claw section 212 extends upward. In this way, the layout of the claw portion 210 and the extension direction of the second claw section 212 are set to meet the user's installation habits and are conducive to improving installation efficiency.

[0083] Alternatively, as Figure 6 As shown, the positioning portion 213 includes a positioning post. The first end of the positioning post is connected to the back plate 201, and the second end thereof extends toward the mounting plate 220. Here, the positioning post is cylindrical, which facilitates smooth passage through the second avoidance opening 232 and allows for more accurate insertion into the insertion hole 222.

[0084] Optionally, screw holes are provided on the periphery of the back plate 201 , and screw fasteners are passed through the screw holes to fix the back plate 201 on the mounting plate 220 .

[0085] In this embodiment, after the motor housing 200 and the mounting plate 220 are positioned and initially fixed using the claw portion 210 and the positioning portion 213, screw fasteners are further used to pass through the screw holes and fasten the motor housing 200 to the mounting plate 220. In this way, the motor housing 200 is finally fixed to the mounting plate 220.

[0086] Alternatively, as Figure 1 As shown, the rack also includes a rack body 400, a winding wheel assembly 410, and a pull rope assembly. The rack body 400 can move along the slide rail assembly; the drive assembly is used to drive the winding wheel assembly 410 to rotate; and the winding wheel assembly 410 drives the rack body 400 to move via the pull rope assembly. Thus, the drive assembly can drive the rack body 400 to move.

[0087] Optionally, the refrigerator includes the above-mentioned shelf. In this way, the user can adjust the position of the shelf through the drive assembly according to needs, thereby facilitating the storage and retrieval of items in the refrigerator.

[0088] Optionally, the mounting plate 220 is pre-buried in the inner container of the refrigerator. In this way, the mounting plate 220 can be regarded as a part of the inner container, which is convenient for installing the drive assembly on the inner container and is conducive to making full use of the internal space of the refrigerator.

[0089] In the third embodiment, the rack includes a slide rail assembly and a fixing assembly 310. Figure 8As shown, the slide rail assembly includes a slide rail body 300, and the slide rail body 300 is provided with a guide groove 301; the fixing assembly 310 is used to fix the pull rope 330, and includes an insert block 311 and a limit opening 313; wherein, the insert block 311 is inserted into the guide groove 301, and the guide groove 301 and the insert block 311 are fixed by a fixing screw 312; the limit opening 313 is located on one side of the insert block 311, and is staggered with the fixing screw 312; and the pull rope 330 extends through the limit opening 313 and is then connected to the fixing assembly 310 to prevent the pull rope 330 from being entangled with the fixing screw 312.

[0090] In this embodiment, the fixing assembly 310 is inserted into the guide slot 301 through the insert block 311, and then the fixing screw 312 is passed through the slot wall of the guide slot 301 from the outside to fix it to the insert block 311, so that the screw head of the fixing screw 312 is located outside the guide slot 301. In this case, when the pull cord 330 is loose or shaken, there is a risk of entanglement with the screw head, such as Figure 9 The dotted line in the figure illustrates the entanglement. However, in this application, once the pull cord 330 extends through the stopper 313, the stopper 313 effectively limits the range of movement of the pull cord 330. Because the stopper 313 and the fixing screw 312 are offset, if the pull cord 330 becomes loose or wobbles, the stopper 313 prevents the pull cord 330 from wrapping around the screw head.

[0091] Alternatively, as Figure 10 As shown, when the pull cord 330 is in a tensioned state, the distance between the pull cord 330 in the limiting opening 313 and the inner wall of the limiting opening 313 is d, and d is ≥ 2 mm. This ensures sufficient clearance between the pull cord 330 and the inner wall of the limiting opening 313, preventing excessive friction between the pull cord 330 and the inner wall of the limiting opening 313 during movement, thereby extending the service life of the pull cord 330.

[0092] For example, the distance d between the pull rope 330 and the inner wall of the limiting opening 313 can be selected to be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm.

[0093] Optionally, when the pull rope 330 is in a tensioned state, the pull rope 330 in the limiting opening 313 is located at the center of the limiting opening 313. In this way, the distance between the pull rope 330 and the inner wall of the limiting opening 313 is relatively uniform, reducing the risk of damage due to local wear.

[0094] Optionally, the limiting opening 313 is configured as a circular opening, an elliptical opening, a square opening, or a strip-shaped opening.

[0095] Optionally, a notch 320 is provided on the side of the limiting opening 313, and the pull rope 330 can be assembled into the limiting opening 313 through the notch 320. In this way, since the pull rope 330 is long and has a more complex layout, the notch 320 design can reduce the difficulty of assembling the pull rope 330.

[0096] Alternatively, as Figure 10 As shown, the side of the limiting opening 313 is divided into a first edge 321 and a second edge 322 by a notch 320 . The first edge 321 and the second edge 322 are arranged close to each other, and the pull rope 330 can enter the limiting opening 313 from the notch 320 by squeezing.

[0097] In this embodiment, both the first edge 321 and the second edge 322 have a certain degree of deformation and recovery capabilities. When the pull cord 330 presses against the two edges, they deform, opening the notch 320, allowing the pull cord 330 to enter the limiting opening 313. Furthermore, after entering, the two edges return to abutting each other, closing the notch 320. This prevents the pull cord 330 from escaping the limiting opening 313 through the notch 320.

[0098] Optionally, the contact surfaces of the first edge 321 and the second edge 322 are inclined at an angle α, and 0<α≤80°. In this way, the drawstring 330 can be squeezed into the limiting opening 313 more smoothly through a reasonable design of the inclination angle.

[0099] Exemplarily, the tilt angle α can be selected from 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75° or 80°.

[0100] Alternatively, as Figure 1 As shown, the rack also includes a rack body 400 and a winding wheel assembly 410. The rack body 400 is movable along the guide slot 301; the winding wheel assembly 410 drives the rack body 400 to move via the pull cord 330. Here, the rack body 400 is connected to a movable pulley assembly 420, which is mounted on the pull cord 330. When the winding wheel assembly 410 winds or releases the pull cord 330, the movable pulley assembly 420 moves along the pull cord 330, thereby driving the rack body 400 to move along the guide slot 301.

[0101] Optionally, the refrigerator includes the above-mentioned shelf. In this way, the user can adjust the position of the shelf through the drive assembly according to needs, thereby facilitating the storage and retrieval of items in the refrigerator.

[0102] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A drive assembly, characterized in that: include: A driving gear (100), wherein a groove (111) is provided on a web (110) of the driving gear (100), and the groove (111) forms a first track when following the rotation of the driving gear (100); A micro switch comprises a moving part (120), a spring part (130) and a trigger part (140); wherein the moving part (120) is located on one side of a groove (111); the spring part (130) is used to provide elastic force to the moving part (120), so that the moving part (120) is always located on a first track; when the moving part (120) moves under the elastic force, a second track is formed, and the trigger part (140) is located on the second track; and when the moving part (120) is sunk into the groove (111), the moving part (120) contacts the trigger part (140), so that the trigger part (140) is triggered; The controller is configured to control the rotation state of the driving gear (100) according to a trigger signal from the trigger unit (140).

2. The drive assembly according to claim 1, characterized in that The moving part (120) includes: A protruding member (121) corresponding to the groove (111); The cantilever member (122) is connected to the protruding member (121) and corresponds to the triggering portion (140).

3. The drive assembly according to claim 2, characterized in that Also includes: A limiting groove (150) is provided on one side of the groove (111) and extends along the second track; a through opening (151) is provided on the groove wall of the limiting groove (150) along its extending direction; The protruding member (121) is arranged in the limiting groove (150) and can move along the limiting groove (150); the cantilever member (122) extends out of the limiting groove (150) through the through opening (151) and can move along the through opening (151).

4. The drive assembly according to claim 3, characterized in that The spring portion (130) is disposed in the limiting groove (150), and a first end of the spring portion (130) is connected to the limiting groove (150), and a second end thereof is connected to the protruding piece (121).

5. The drive assembly according to claim 4, characterized in that The protruding piece (121) is provided with a receiving groove (123), and the second end of the spring portion (130) is connected to the receiving groove (123).

6. The drive assembly according to any one of claims 1 to 5, characterized in that: Slope surfaces (112) are provided on both sides of the groove (111) to facilitate the moving part (120) to enter and exit the groove (111).

7. The drive assembly according to any one of claims 1 to 5, characterized in that: Also includes: The fixing plate (141) is arranged on one side of the micro switch and is used for installing the trigger part (140).

8. A shelf, characterized in that: Comprising a drive assembly according to any one of claims 1 to 7.

9. The shelf according to claim 8, characterized in that: Also includes: The shelf body (400) is movable along the slide rail assembly; The winding wheel assembly (410) is driven by a driving gear (100) for driving the winding wheel assembly (410) to rotate; A pull rope assembly, a winding wheel assembly (410) drives the shelf body (400) to move through the pull rope assembly; Furthermore, when the controller receives a trigger signal from the trigger portion (140), it controls the driving gear (100) to stop rotating or reverse, thereby controlling the shelf body (400) to stop moving or reverse moving.

10. A refrigerator, characterized in that: Comprising the shelf according to claim 8 or 9.

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