Slide rail structure and drawer

Abstract

The application relates to the technical field of slide rail structures, and discloses a slide rail structure and a drawer. The slide rail structure comprises a bottom rail, an upper rail and a middle rail located between the bottom rail and the upper rail, the bottom rail is provided with a bottom rail rack, the upper rail is provided with a connecting strip, a plurality of gear holes are arranged on the connecting strip at intervals, the middle rail is provided with a gear assembly, the gear assembly comprises a middle rail wheel frame connected to the middle rail and a middle rail gear rotatably connected to the middle rail wheel frame, a part of the middle rail gear penetrates through the top surface of the middle rail and is matched with the gear holes, another part of the middle rail gear is engaged with the bottom rail rack, at least one opening is formed in the side wall of the middle rail, and an abutting strip extends into the opening and abuts against the bottom surface of the bottom rail rack. By exerting a supporting force on the bottom rail rack through the abutting strip on the middle rail, the engagement surface of the rack on the bottom rail and the rack on the middle rail can be effectively prevented from being dislocated due to the falling of the bottom rail rack, so that the operation reliability of the slide rail structure can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of slide rail structure technology, and in particular to a slide rail structure and drawer. Background Technology

[0002] As an important functional component of modern furniture and appliances, drawer slides are currently mainly divided into two types: two-section and three-section. Two-section slides cannot fully extend the drawer, creating a blind spot for users and significantly impacting product efficiency. Three-section slides, however, effectively solve this problem, allowing the entire drawer to be pulled out, and are therefore increasingly widely used.

[0003] The three-section drawer slide structure consists of an upper rail fixed to the drawer, a bottom rail fixed to the cabinet, and a middle rail located between the upper and bottom rails. To achieve multi-rail linkage, rack and pinion frames are installed on the upper, middle, and bottom rails. The sliding of the upper and middle rails is achieved by the interaction of the racks on the rack and pinion frames. However, when the drawer is fully extended, the rack on the bottom rail loses its bottom support and shifts downward under gravity. This causes the meshing surfaces of the racks on the bottom rail and the racks on the middle rail to become misaligned, preventing synchronous drive and affecting the operational reliability of the drawer slide structure. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a slide rail structure and drawer to solve the problem that the slide rail structure cannot be synchronously driven due to the rack on the bottom rail sagging.

[0005] In a first aspect, this application provides a slide rail structure, comprising:

[0006] Bottom rail, on which a bottom rail rack extending in a first direction is mounted;

[0007] The upper rail is equipped with a connecting strip extending along the first direction, and the connecting strip is provided with a plurality of toothed holes spaced apart along the first direction.

[0008] A middle rail is located between the bottom rail and the upper rail. A gear assembly is installed on the middle rail. The gear assembly includes a middle rail wheel frame connected to the middle rail and a middle rail gear rotatably connected to the middle rail wheel frame. A part of the middle rail gear penetrates the top surface of the middle rail and engages with the tooth hole, and the other part of the middle rail gear meshes with the bottom rail rack.

[0009] The middle rail has at least one opening on its side wall, and an abutment strip extends from the opening toward the bottom rail rack, the abutment strip abutting against the bottom surface of the bottom rail rack.

[0010] In one embodiment, the top surface of the middle rail is provided with a through hole, and the two ends of the middle rail wheel frame are provided with mounting posts that cooperate with the through hole.

[0011] In one embodiment, the upper rail has a sliding cavity, and two upper rail wheel frames are fixed inside the sliding cavity. The two upper rail wheel frames are respectively connected to both ends of the connecting strip so that the connecting strip is installed inside the sliding cavity. The upper rail wheel frames are provided with openings at intervals at positions aligned with the tooth holes. The openings are used to cooperate with the portion of the middle rail gear that extends out of the top surface of the middle rail.

[0012] In one embodiment, both ends of the top surface of the middle rail are provided with protruding limiting portions, which are located on the moving path of the upper rail wheel frame, so that when the upper rail slides relative to the middle rail to the maximum stroke, the limiting portions abut against the upper rail wheel frame.

[0013] In one embodiment, the bottom rail includes a supporting side plate and a connecting side plate, the connecting side plate being connected to the cabinet, a bottom rail wheel frame being fixed on the supporting side plate, the bottom rail rack being located on the side of the supporting side plate away from the connecting side plate and being connected to the bottom rail wheel frame; and the middle rail being mounted on the supporting side plate.

[0014] In one embodiment, the bottom rail wheel frame has a slot extending through one side therethrough, and the supporting side plate has a bent snap-fit ​​section extending in a second direction, which snaps into the slot so that the bottom rail wheel frame is fixed on the supporting side plate.

[0015] In one embodiment, the bottom rail rack includes a body portion and a rack portion. The rack portion is disposed on the side of the body portion away from the bottom rail frame along a first direction. Two extension strips extend from the side of the body portion facing the bottom rail frame along a second direction. A receiving cavity is defined between the two extension strips, and a sliding groove is provided on the extension strip. The two ends of the bottom rail frame are provided with sliding strips that cooperate with the sliding grooves, so that the bottom rail frame can be detachably accommodated in the receiving cavity.

[0016] In one embodiment, the slide rail structure further includes a damping component, the damping component comprising:

[0017] A bracket is located below and connected to the bottom rail;

[0018] A slider, which is slidably disposed on the bracket along the first direction;

[0019] A connecting piece is disposed on the outside of the upper rail. The upper end of the connecting piece is connected to the upper rail, and the lower end of the connecting piece is connected to the slider, so that the upper rail can drive the slider to slide along the first direction when it slides.

[0020] A damping element is provided on the bracket along the first direction, and one end of the damping element is connected to a connecting block, which is located on the sliding path of the slider.

[0021] In one embodiment, the bottom surface of the bracket is provided with a slide rail extending along the first direction, and the surface of the slider facing the bottom surface of the bracket has a sliding post, which extends into the slide rail and can slide along the extension direction of the slide rail.

[0022] Secondly, this application also provides a drawer, including the slide rail structure described in the above embodiments.

[0023] The technical solutions provided in this application have the following advantages compared with the prior art:

[0024] By opening an opening in the side wall of the middle rail and setting an abutment strip extending towards the bottom rail rack inside the opening, the abutment strip abuts against the bottom surface of the bottom rail rack. At this time, the abutment strip applies a supporting force to the bottom rail rack, which can effectively prevent the meshing surface of the rack on the bottom rail and the rack on the middle rail from misaligning due to the bottom rail rack sagging, thereby ensuring the operational reliability of the slide rail structure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a slide rail structure according to an embodiment of the present invention;

[0026] Figure 2 This is a front view schematic diagram of a slide rail structure according to an embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of a gear assembly with a slide rail structure according to an embodiment of this utility model;

[0028] Figure 4 This is an exploded schematic diagram of a slide rail structure according to an embodiment of this utility model;

[0029] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0030] Figure 6 This is a schematic diagram of the bottom rail and middle rail of a slide rail structure according to an embodiment of the present invention.

[0031] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0032] Figure 8 This is a schematic diagram of the connecting strip, gear assembly, and bottom rail rack of a slide rail structure according to an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the upper rail, upper rail wheel frame, and connecting strip of a slide rail structure according to an embodiment of this utility model;

[0034] Figure 10 This is a schematic diagram of the bottom rail rack and bottom rail structure of a slide rail structure according to an embodiment of the present invention;

[0035] Figure 11 This is an exploded view of the bottom rail rack and bottom rail wheel frame of a slide rail structure according to an embodiment of the present invention;

[0036] Figure 12 This is a schematic diagram of the damping component of a slide rail structure according to an embodiment of the present invention.

[0037] Icon labels:

[0038] 10. Bottom rail; 11. Connecting side plate; 12. Supporting side plate; 12a. Snap-fit ​​section; 20. Upper rail; 20a. Sliding cavity; 30. Middle rail; 30a. Limiting part; 30b. Opening; 30c. Abutment strip; 40. Damping assembly; 41. Bracket; 41a. Slide rail; 42. Slider; 43. Connecting piece; 44. Damping component; 45. Connecting block; 50. Gear assembly; 51. Middle rail wheel frame; 52. Middle rail gear; 53. Mounting column; 60. Bottom rail wheel frame; 60a. Slot; 61. Slide bar; 70. Upper rail wheel frame; 70a. Opening; 80. Bottom rail rack; 81. Body part; 811. Extension bar; 811a. Slide groove; 82. Rack part; 90. Connecting bar; 90a. Tooth hole; X, First direction; Y, Second direction. Detailed Implementation

[0039] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0040] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0042] Please combine them together Figures 1 to 4 As shown in the figure, a slide rail structure according to an embodiment of the present invention includes a bottom rail 10, an upper rail 20, and a middle rail 30. The bottom rail 10 is equipped with a bottom rail rack 80 extending along a first direction X. The upper rail 20 is equipped with a connecting strip 90 extending along the first direction X, and the connecting strip 90 is provided with a plurality of toothed holes 90a spaced apart along the first direction X. The middle rail 30 is located between the bottom rail 10 and the upper rail 20, and a gear assembly 50 is installed on the middle rail 30. The gear assembly 50 includes a middle rail wheel frame 51 connected to the middle rail 30 and a middle rail gear 52 rotatably connected to the middle rail wheel frame 51. A part of the middle rail gear 52 penetrates the top surface of the middle rail 30 and engages with the toothed holes 90a, and the other part of the middle rail gear 52 meshes with the bottom rail rack 80.

[0043] It should be noted here that the "first direction X" mentioned above is defined for the convenience of describing the positional relationship between components. The bottom rail 10 can be used as a reference point. Specifically, the first direction X refers to the length direction of the bottom rail 10 (refer to...). Figure 1 (X direction).

[0044] In practical applications, the bottom rail 10 is fixedly connected to the side panel of the cabinet, the top rail 20 is fixedly connected to the drawer side panel, and the middle rail 30 is connected between the bottom rail 10 and the top rail 20. The middle rail 30 can slide relative to the bottom rail 10, and the top rail 20 can slide relative to the middle rail 30. When the drawer is pulled out, the top rail 20 is first pulled and slides relative to the middle rail 30 until it is pulled out to its maximum travel. Then, as the drawer continues to be pulled out, the middle rail 30 is pulled and slides relative to the bottom rail 10, thus fully extending the drawer. Therefore, to achieve the sliding of the middle rail 30 relative to the bottom rail 10 and the sliding of the top rail 20 relative to the middle rail 30, refer to... Figure 8 As shown, in this embodiment, a bottom rail rack 80 extending along the first direction X is installed on the bottom rail 10, and a connecting strip 90 is installed on the upper rail 20. The connecting strip 90 is provided with a plurality of toothed holes 90a at intervals. Then, the middle rail gear 52 is installed on the middle rail 30 using the middle rail wheel frame 51. A part of the middle rail gear 52 extends through the middle rail 30 and engages with the toothed holes 90a. The other part of the middle rail gear 52 meshes with the bottom rail rack 80, thereby realizing the sliding of the upper rail 20 relative to the middle rail 30 and the sliding of the middle rail 30 relative to the bottom rail 10.

[0045] To facilitate understanding of the operating principle of this drawer slide structure, the following explanation uses pulling out the drawer and closing the drawer as examples:

[0046] When the drawer is pulled out, the upper rail 20 slides along with the drawer. Since the connecting strip 90 installed on the upper rail 20 has multiple toothed holes 90a, it can mesh with the middle rail gear 52 through the top surface of the middle rail 30 to form a transmission, thereby allowing the upper rail 20 to slide relative to the middle rail 30. After the upper rail 20 is pulled out to its maximum stroke, the upper rail 20 is restricted from sliding out further. However, as the drawer continues to be pulled out, the middle rail 30 is pulled by the upper rail 20, causing the middle rail 30 to be pulled. At this time, the middle rail gear 52 moves along the extension direction of the bottom rail rack 80, thereby allowing the middle rail 30 to slide relative to the bottom rail 10 until the drawer is fully pulled out.

[0047] When the drawer is pushed back into the cabinet, the middle rail 30 slides as the drawer moves inward, causing the middle rail 30 to slide relative to the bottom rail 10. This pushes the middle rail 30 back between the upper rail 20 and the bottom rail 10. As the drawer continues to be pushed, the upper rail 20 is pushed and slides relative to the middle rail 30, causing the upper rail 20 to be pushed back to a position overlapping the middle rail 30. This retracts the extended middle rail 30 and the upper rail 20.

[0048] Reference Figure 5As shown, at least one opening 30b is provided on the side wall of the middle rail 30. An abutment strip 30c extends from the opening 30b toward the bottom rail rack 80 and abuts against the bottom surface of the bottom rail rack 80. In other words, the slide rail structure of this application provides an opening 30b on the side wall of the middle rail 30, and an abutment strip 30c extending toward the bottom rail rack 80 is provided in the opening 30b. The abutment strip 30c abuts against the bottom surface of the bottom rail rack 80. At this time, the abutment strip 30c applies a supporting force to the bottom rail rack 80, which can effectively prevent the meshing surface of the rack on the bottom rail 10 and the rack of the middle rail 30 from misalignment due to the bottom rail rack 80 sagging, thereby ensuring the operational reliability of the slide rail structure.

[0049] It should be noted that the abutment strip 30c is formed using the material of the middle rail 30 itself. Without the need for additional external parts, the sidewall of the middle rail 30 can be cut using laser cutting to form the abutment strip 30c. Then, the abutment strip 30c is bent towards the bottom rail rack 80, allowing it to abut against the bottom surface of the bottom rail rack 80. This ensures the structural strength of the abutment strip 30c and the middle rail 30, while also significantly reducing manufacturing costs.

[0050] Reference Figure 3 In one embodiment, the top surface of the middle rail 30 has a through hole, and both ends of the middle rail wheel frame 51 have mounting posts 53 that mate with the through hole. That is, after the middle rail gear 52 is rotatably mounted on the middle rail wheel frame 51, the middle rail wheel frame 51 is placed into the sliding groove 811a of the middle rail 30, and the mounting posts 53 on the middle rail wheel frame 51 are inserted into the through hole from bottom to top, thereby fixing the middle rail wheel frame 51 to the middle rail 30. At this time, a part of the rack of the middle rail gear 52 passes through the top surface of the middle rail 30, thereby realizing the detachable connection of the middle rail gear 52 to the middle rail 30. The structure is simple, easy to disassemble and assemble, and convenient for subsequent maintenance or replacement.

[0051] Please combine Figure 4 and Figure 9 As shown, in one embodiment, the upper rail 20 has a sliding cavity 20a, and two upper rail wheel frames 70 are fixed in the sliding cavity 20a. The two upper rail wheel frames 70 are respectively connected to both ends of the connecting strip 90 so that the connecting strip 90 is installed in the sliding cavity 20a. The upper rail wheel frames 70 are provided with openings 70a at intervals at positions aligned with the tooth holes 90a. The openings 70a are used to cooperate with the part of the middle rail gear 52 that extends out of the top surface of the middle rail 30.

[0052] For example, two upper rail wheel frames 70 are connected to both ends of the connecting strip 90 to form a whole. Then, the upper rail wheel frame 70 slides into the slide channel 41a cavity from one end of the upper rail 20. At this time, the upper rail wheel frame 70 abuts against the two sides of the upper rail 20, thus fixing the upper rail wheel frame 70 within the sliding cavity 20a. Since the connecting strip 90 is connected by the two upper rail wheel frames 70, the connecting strip 90 is installed within the sliding cavity 20a. If it is necessary to remove the connecting strip 90 from the sliding cavity 20a, simply push the upper rail wheel frame 70 from one end of the upper rail 20 to slide it out from the other end, and the connecting strip 90 can be quickly removed. The structure is simple and easy to assemble and disassemble. It should be noted that two symmetrical spring arms can extend downwards from the lower surface of the upper rail wheel frame 70. The upper rail wheel frame 70 can be detachably installed within the sliding cavity 20a by abutting against the two sides of the upper rail 20. This is only an example, but is not limited to this.

[0053] Furthermore, by providing openings 70a at intervals at positions aligned with the toothed holes 90a on the upper rail wheel frame 70, the openings 70a and the toothed holes 90a are aligned on the same straight line. This allows the upper rail 20 to engage with the rack of the middle rail gear 52 when sliding, preventing the rack of the middle rail gear 52 from repeatedly contacting the surface of the upper rail wheel frame 70 and thus avoiding the risk of wear or tooth breakage. This helps to extend the life of the middle rail gear 52.

[0054] Reference Figure 6 As shown, during the drawer's pulling process, the upper rail 20 slides first, and after the upper rail 20 is pulled out to its maximum stroke, the middle rail 30 is then pulled to slide. However, to prevent the upper rail 20 from being completely pulled out and detached from the middle rail 30, thus preventing the slide rail structure from malfunctioning, one embodiment provides protruding limiting portions 30a at both ends of the top surface of the middle rail 30. These limiting portions are located on the movement path of the upper rail wheel frame 70, so that when the upper rail 20 slides relative to the middle rail 30 to its maximum stroke, the limiting portions 30a abut against the upper rail wheel frame 70. In other words, when the drawer is pulled to move the upper rail 20 to its maximum stroke, the upper rail wheel frame 70 mounted on the upper rail 20 is abutted by the limiting portions 30a, thus restricting the upper rail 20 from continuing to slide out, effectively preventing the upper rail 20 from being completely pulled out.

[0055] Reference Figure 10 As shown, in one embodiment, the bottom rail 10 includes a connected supporting side plate 12 and a connecting side plate 11. The connecting side plate 11 is used to connect with the cabinet. A bottom rail wheel frame 60 is fixed on the supporting side plate 12. The bottom rail rack 80 is located on the side of the supporting side plate 12 away from the connecting side plate 11 and is connected to the bottom rail wheel frame 60. The middle rail 30 is covered on the supporting side plate 12.

[0056] For example, by fixing the bottom rail wheel frame 60 to the support side plate portion 12 and connecting the bottom rail wheel frame 60 to the bottom rail rack 80, with the bottom rail rack 80 located on the side of the support side plate away from the connecting side plate portion 11, the bottom rail rack 80 and the bottom rail wheel frame 60 are placed on both sides of the support side plate portion 12, forming an inner and outer layered arrangement, which helps to save lateral space and make the structure more compact. In addition, the bottom rail wheel frame 60 and the bottom rail rack 80 can be fixed separately (such as by snap-fit, riveting, or detachable bolts), so that worn parts can be replaced individually without replacing the whole assembly, reducing maintenance costs.

[0057] Reference Figure 10 and Figure 11 As shown, in one embodiment, the bottom rail wheel frame 60 has a slot 60a extending through one side, and the supporting side plate 12 has a bent engaging section 12a extending in the second direction Y. The engaging section 12a engages within the slot 60a, thereby fixing the bottom rail wheel frame 60 to the supporting side plate 12. Thus, by engaging the slot 60a with the bent engaging section 12a on the supporting side plate 12, the bottom rail wheel frame 60 is quickly fixed to the bottom rail 10 without the need for bolts, welding, or adhesive, significantly reducing assembly time.

[0058] Reference Figure 11 As shown, in one embodiment, the bottom rail rack 80 includes a body portion 81 and a rack portion 82. The rack portion 82 is disposed on the side of the body portion 81 facing away from the bottom rail wheel frame 60 along a first direction X. The side of the body portion 81 facing the bottom rail wheel frame 60 has two extension bars 811 extending along a second direction Y. A receiving cavity is defined between the two extension bars 811, and a sliding groove 811a is provided on the extension bars 811. The two ends of the bottom rail wheel frame 60 are provided with sliding strips 61 that cooperate with the sliding grooves 811a, so that the bottom rail wheel frame 60 can be detachably accommodated in the receiving cavity.

[0059] For example, the body portion 81 and the rack portion 82 can be either a single piece or separate pieces. That is, the body portion 81 and the rack portion 82 can be manufactured using a single-piece molding process, or they can form two separate structures: the body portion 81 and the rack portion 82 are molded separately and then connected to form the bottom rail rack 80. Specifically, in this embodiment, the bottom rail rack 80 is manufactured using a single-piece molding process, with the rack portion 82 and the body portion 81 being a single piece. This eliminates the need for a connection between the rack portion 82 and the body portion 81, thereby ensuring that the formed bottom rail rack 80 has better structural strength.

[0060] Furthermore, by extending two extension strips 811 from the side of the main body 81 facing the wheel frame, defining a receiving cavity with the two extension strips 811, and opening a sliding groove 811a on the extension strips 811, corresponding to the two ends of the bottom rail wheel frame 60, when it is necessary to connect the bottom rail rack 80 to the bottom rail wheel frame 60, the bottom rail wheel frame 60 is aligned with the receiving cavity, and the bottom rail wheel frame 60 is pushed close to the bottom rail rack 80, so that the sliding strip 61 slides into the sliding groove 811a until the bottom rail wheel frame 60 is installed into the receiving cavity, thereby realizing the detachable connection between the bottom rail wheel frame 60 and the bottom rail rack 80, allowing worn parts to be replaced individually without the need for overall replacement, thus reducing maintenance costs.

[0061] Reference Figure 12 As shown, in one embodiment, the slide rail structure further includes a damping assembly 40, which includes a bracket 41, a slider 42, a connecting piece 43, and a damping element 44. The bracket 41 is located below the bottom rail 10 and connected to the bottom rail 10. The slider 42 is slidably disposed on the bracket 41 along the first direction X. The connecting piece 43 is disposed on the outside of the upper rail 20, with its upper end connected to the upper rail 20 and its lower end connected to the slider 42, so that the upper rail 20 can drive the slider 42 to slide along the first direction X when it slides. The damping element 44 is disposed on the bracket 41 along the first direction X, and one end of the damping element 44 is connected to a connecting block 45, which is located on the sliding path of the slider 42.

[0062] For example, when the upper rail 20 is pulled to slide, the connecting piece 43 is driven to move along with the upper rail 20. Since the lower end of the connecting piece 43 is connected to the slider 42, the slider 42 is driven to slide along the first direction X on the bracket 41 and gradually approach the connecting block 45 connected to one end of the damping member 44. When the slider 42 contacts the connecting block 45, the damping member 44 (such as a spring, hydraulic damper, etc.) is compressed or the damping medium is triggered to flow. By absorbing the kinetic energy of the upper rail 20 sliding, the mechanical motion energy is converted into heat energy or elastic potential energy, thereby slowing down the sliding speed of the upper rail 20. Especially at the end of the sliding (such as the moment the drawer is closed), the impact is significantly reduced, avoiding the impact noise and structural damage caused by high-speed sliding.

[0063] For example, the damping component 40 provides continuous or progressive damping force throughout the sliding process through the dynamic interaction between the slider 42 and the damping element 44. For instance, when the slider 42 is not in contact with the connecting block 45, the damping element 44 does not intervene, and the upper rail 20 can slide freely; when the slider 42 contacts the connecting block 45, the damping force gradually increases, thus creating a "soft landing" effect. In this way, the shaking or jamming of the upper rail 20 during sliding can be effectively suppressed, making the sliding process smoother and improving the user's operating experience (such as the "smooth push and pull" feeling of a furniture drawer).

[0064] Furthermore, the connecting piece 43 is located on the outside of the upper rail 20, with its upper end connected to the upper rail 20 and its lower end connected to the slider 42. This allows the movement of the upper rail 20 to be directly transmitted to the damping assembly 40 without the need for a complex transmission structure, resulting in a more compact structure. Specifically, the upper end of the connecting piece 43 can be bolted to the upper rail 20, and the lower end of the connecting piece 43 can be snapped onto the slider 42. This is merely an example and is not limited to this.

[0065] In one embodiment, the bottom surface of the bracket 41 is provided with a slide rail 41a extending along the first direction X. The surface of the slider 42 facing the bottom surface of the bracket 41 has a sliding post that extends into the slide rail 41a and can slide along the extension direction of the slide rail 41a. In this way, it can be ensured that when the upper rail 20 drives the slider 42 to move through the connecting piece 43, the movement trajectory is strictly along the first direction X, avoiding skewing or jamming caused by lateral forces and improving the movement accuracy of the slide rail system.

[0066] For the same purpose, this embodiment also provides a drawer, including the slide rail structure of the above embodiment.

[0067] The drawer according to the embodiments of this disclosure, which adopts the above-described slide rail structure, has the same technical effects as the above-described slide rail structure, and will not be described again here.

[0068] In summary, the embodiments of this application provide a slide rail structure and drawer. By opening an opening 30b on the side wall of the middle rail 30, and providing an abutment strip 30c extending toward the bottom rail rack 80 within the opening 30b, the abutment strip 30c abuts against the bottom surface of the bottom rail rack 80. At this time, the abutment strip 30c applies a supporting force to the bottom rail rack 80, which can effectively prevent the meshing surface of the rack on the bottom rail 10 and the rack of the middle rail 30 from misalignment due to the bottom rail rack 80 sagging, thereby ensuring the operational reliability of the slide rail structure. Furthermore, by installing a bottom rail rack 80 extending along the first direction X on the bottom rail 10 and a connecting strip 90 on the upper rail 20, with multiple toothed holes 90a spaced apart on the connecting strip 90, and then using the middle rail wheel frame 51 to install the middle rail gear 52 on the middle rail 30, a part of the middle rail gear 52 extends through the middle rail 30 and engages with the toothed holes 90a, and the other part of the middle rail gear 52 meshes with the bottom rail rack 80, thereby enabling the upper rail 20 to slide relative to the middle rail 30 and the middle rail 30 to slide relative to the bottom rail 10.

[0069] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A slide rail structure, characterized in that, include: Bottom rail, on which a bottom rail rack extending in a first direction is mounted; The upper rail is equipped with a connecting strip extending along the first direction, and the connecting strip is provided with a plurality of toothed holes spaced apart along the first direction. A middle rail is located between the bottom rail and the upper rail. A gear assembly is installed on the middle rail. The gear assembly includes a middle rail wheel frame connected to the middle rail and a middle rail gear rotatably connected to the middle rail wheel frame. A part of the middle rail gear penetrates the top surface of the middle rail and engages with the tooth hole, and the other part of the middle rail gear meshes with the bottom rail rack. The middle rail has at least one opening on its side wall, and an abutment strip extends from the opening toward the bottom rail rack, the abutment strip abutting against the bottom surface of the bottom rail rack.

2. The slide rail structure according to claim 1, characterized in that, The top surface of the middle rail has a through hole, and both ends of the middle rail wheel frame have mounting posts that mate with the through hole.

3. The slide rail structure according to claim 1, characterized in that, The upper rail has a sliding cavity, and two upper rail wheel frames are fixed inside the sliding cavity. The two upper rail wheel frames are respectively connected to both ends of the connecting strip so that the connecting strip is installed in the sliding cavity. The upper rail wheel frames are provided with openings at intervals at positions aligned with the tooth holes. The openings are used to cooperate with the part of the middle rail gear that extends out of the top surface of the middle rail.

4. The slide rail structure according to claim 3, characterized in that, Both ends of the top surface of the middle rail are provided with protruding limiting parts. The limiting parts are located on the moving path of the upper rail wheel frame so that when the upper rail slides relative to the middle rail to the maximum stroke, the limiting parts abut against the upper rail wheel frame.

5. The slide rail structure according to claim 1, characterized in that, The bottom rail includes a supporting side plate and a connecting side plate. The connecting side plate is used to connect with the cabinet. A bottom rail wheel frame is fixed on the supporting side plate. The bottom rail rack is located on the side of the supporting side plate away from the connecting side plate and is connected to the bottom rail wheel frame. The middle rail is covered on the supporting side plate.

6. The slide rail structure according to claim 5, characterized in that, The bottom rail wheel frame has a slot that passes through one side of it, and the supporting side plate has a bent snap-fit ​​section that extends in a second direction. The snap-fit ​​section snaps into the slot so that the bottom rail wheel frame is fixed on the supporting side plate.

7. The slide rail structure according to claim 4, characterized in that, The bottom rail rack includes a body portion and a rack portion. The rack portion is disposed on the side of the body portion away from the bottom rail frame along the first direction. Two extension strips extend from the side of the body portion facing the bottom rail frame along the second direction. A receiving cavity is defined between the two extension strips, and a sliding groove is provided on the extension strip. The two ends of the bottom rail frame are provided with sliding strips that cooperate with the sliding grooves, so that the bottom rail frame can be detachably accommodated in the receiving cavity.

8. The slide rail structure according to claim 1, characterized in that, The slide rail structure further includes a damping component, which comprises: A bracket is located below and connected to the bottom rail; A slider, which is slidably disposed on the bracket along the first direction; A connecting piece is disposed on the outside of the upper rail. The upper end of the connecting piece is connected to the upper rail, and the lower end of the connecting piece is connected to the slider, so that the upper rail can drive the slider to slide along the first direction when it slides. A damping element is provided on the bracket along the first direction, and one end of the damping element is connected to a connecting block, which is located on the sliding path of the slider.

9. The slide rail structure according to claim 8, characterized in that, The bottom surface of the bracket is provided with a slide rail extending along the first direction. The surface of the slider facing the bottom surface of the bracket has a sliding post. The sliding post extends into the slide rail and can slide along the extension direction of the slide rail.

10. A drawer, characterized in that, Includes the slide rail structure as described in any one of claims 1 to 9.

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