Adjustable torsion return device of cabinet door and storage cabinet

Abstract

The utility model discloses an adjustable torsion return device of a cabinet door and a storage cabinet, belongs to the technical field of storage cabinets, and aims to overcome the defect that an existing cabinet door does not have a hovering function. The returning device comprises a returning driving part, a lower seat and a lifting part capable of moving up and down relative to the lower seat, the lower seat is provided with a supporting table and a limiting groove, the lifting part is provided with a limiting part, and the lifting part can rotate relative to the lower seat so that the limiting part can abut against the upper end of the supporting table or be embedded into the limiting groove; an adjusting worm and an adjusting turbine are arranged on the lower seat, the first end part of the return driving part is fixed with the lifting part, and the second end part of the return driving part is circumferentially positioned with the adjusting turbine and can move up and down relative to the adjusting turbine. The cabinet door has the hovering function, the return torsion of the cabinet door can be adjusted, the cabinet door can be kept in an open state for loading conveniently, good return force of the cabinet door can be kept conveniently, and the phenomenon that the cabinet door is difficult to return after being used for a long time is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of storage cabinet, and relates to an adjustable torsion returning device of cabinet door and storage cabinet. BACKGROUND

[0002] The application discloses a "stepless adjustable torsion automatic returning device of a door body", and the application discloses a patent application with the application publication number CN112377024A, which realizes arbitrary angle free adjustment of door returning steel wire torsion size, and always guarantees that the torsion of the door body automatic returning device is consistent with the torsion at the time of factory delivery, and the device is mainly applied to a refrigerator without hovering function, and the cabinet door cannot hover at a specific angle after being opened, so that the human body needs to push against the cabinet door when loading, so as to prevent the cabinet door from being closed, and the device is relatively inconvenient. SUMMARY

[0003] The utility model discloses a kind of adjustable torsion returning device of cabinet door and storage cabinet for the problems existing in prior art, to overcome the defect that existing cabinet door does not have hovering function.

[0004] The utility model is realized as follows:

[0005] An adjustable torsion returning device of cabinet door, characterized in that it comprises a returning drive, a lower seat and a lifting member movable up and down relative to the lower seat, a supporting table and a limiting groove are provided on the lower seat, the lifting member has a limiting portion, and the lifting member is rotatably arranged relative to the lower seat so that the limiting portion abuts against the upper end of the supporting table or is embedded in the limiting groove.

[0006] An adjusting worm and an adjusting turbine are provided on the lower seat, the first end of the returning drive is fixed to the lifting member, and the second end is circumferentially positioned with the adjusting turbine and can move up and down relative to the adjusting turbine.

[0007] The second end of the returning drive is fixed with a transmission seat, and the transmission seat is circumferentially positioned with the adjusting turbine and can move up and down relative to the adjusting turbine.

[0008] The outer side of the transmission seat has a first circumferential positioning structure, the adjusting turbine has an assembly hole, the hole wall of the assembly hole has a second circumferential positioning structure matched with the first circumferential positioning structure, and the height of the first circumferential positioning structure is greater than the thickness of the adjusting turbine.

[0009] The returning drive is a steel wire, a cylindrical hole is provided on the transmission seat, the returning drive passes through the cylindrical hole, and the lower end of the returning drive has a blocking portion to prevent the returning drive from passing upward through the cylindrical hole.

[0010] The upper end of the transmission seat abuts against the lifting member.

[0011] The first circumferential positioning structure of the transmission seat is located at a position with gradually increasing outer diameter from top to bottom, and the lower end of the transmission seat has a guiding portion with gradually decreasing outer diameter from top to bottom.

[0012] One of the first circumferential positioning structure and the second circumferential positioning structure is a circular arc rib, and the other is a circular arc groove, and the central angle of the cross section of the circular arc rib is 120-240 degrees.

[0013] The support table and / or the limiting portion is provided with a guiding slope, and when the lifting piece rotates relative to the lower seat in a first direction, the guiding slope enables the lifting piece to move upward relative to the lower seat, and the limiting portion moves from the limiting groove to the upper end of the support table.

[0014] The lifting piece and the lower seat are provided with a limiting structure to limit the rotation angle of the lifting piece relative to the lower seat.

[0015] The limiting structure includes a first limiting wall located at one end of the support table and a second limiting wall located at one end of the limiting portion, and the first limiting wall and the second limiting wall abut to prevent the lifting piece from rotating relative to the lower seat in a second direction.

[0016] The first limiting wall and the second limiting wall are vertical walls.

[0017] The lower seat is provided with a mounting groove, the support table is located in the mounting groove, the lifting piece has a mounting column, the limiting portion is located on the mounting column, and the mounting column is embedded in the mounting groove.

[0018] The lower seat is fixed with a bottom cover, one end of the bottom cover is provided with a positioning rib, the lower seat is provided with a positioning groove matched with the positioning rib, the adjusting worm is located between the bottom cover and the lower seat, and the bottom cover has a clearance hole corresponding to the adjusting worm.

[0019] A storage cabinet, characterized by comprising the return device, further comprising a cabinet body and a cabinet door, the lower seat is fixed on the cabinet body, and the lifting piece is fixed on the cabinet door.

[0020] The cabinet door has hovering function and can adjust the return torque of the cabinet door, so that the cabinet door can be kept in an open state for loading, and the cabinet door can also keep good return force to avoid the phenomenon that the cabinet door is difficult to return after long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of a storage cabinet.

[0022] Figure 2 It is Figure 1Enlarged view of the middle part A;

[0023] Figure 3 Sectional view of the return device;

[0024] Figure 4 First partial view of the return device;

[0025] Figure 5 Second partial view of the return device;

[0026] Figure 6 Third partial view of the return device;

[0027] Figure 7 First angle view of the lower seat;

[0028] Figure 8 Second angle view of the lower seat;

[0029] Figure 9 View of the bottom cover;

[0030] Figure 10 View of the adjusting worm;

[0031] Figure 11 View of the transmission seat;

[0032] Figure 12 View of the adjusting worm of another embodiment;

[0033] Figure 13 View of the transmission seat of another embodiment.

[0034] The accompanying drawings are described as follows: 100, cabinet; 200, cabinet door; 300, lower seat; 310, support table; 320, limiting groove; 330, guide slope; 340, first limiting wall; 350, mounting groove; 360, bottom cover; 361, positioning rib; 362, positioning groove; 363, accommodation hole; 400, lifting piece; 410, upper seat body; 411, limiting part; 412, second limiting wall; 413, mounting column; 420, reinforcing plate; 430, sleeve; 500, return driving piece; 510, transmission seat; 511, cylindrical hole; 512, circular arc groove; 513, guide part; 520, blocking part; 610, adjusting worm; 620, adjusting worm; 621, circular arc rib. DETAILED DESCRIPTION

[0035] The specific embodiments described hereinbefore are intended to be illustrative only and are not intended to limit the scope of the present application. Changes can be made to the embodiments described without departing from the spirit and scope of the present application which is defined in the following claims.

[0036] This embodiment provides a storage cabinet, such as Figures 1-11 As shown, the device includes a return mechanism, a housing 100, and a cabinet door 200. The return mechanism includes a return drive component 500, a lower base 300, and a lifting component 400 that can move up and down relative to the lower base 300. The lower base 300 is provided with a support platform 310 and a limiting groove 320. The lifting component 400 has a limiting part 411. The lifting component 400 is rotatably arranged relative to the lower base 300 so that the limiting part 411 abuts against the upper end of the support platform 310 or is embedded in the limiting groove 320. The lower base 300 is provided with an adjusting worm gear 610 and an adjusting turbine 620. The first end of the return drive component 500 is fixed to the lifting component 400, and its second end is circumferentially positioned with the adjusting turbine 620 and can move up and down relative to the adjusting turbine 620. The lower base 300 is fixed to the housing 100, and the lifting component 400 is fixed to the cabinet door 200.

[0037] When the cabinet door 200 is closed, the limiting part 411 abuts against the support platform 310, and the lifting component 400 is in a high position. When the cabinet door 200 is opened to a first angle, for example, to 90 degrees, the limiting part 411 and the support platform 310 are misaligned, and the lifting component 400 descends under the action of gravity, causing the limiting part 411 to fall into the limiting groove 320. The force required for the lifting component 400 to rise is greater than the torque of the return drive component 500, so the cabinet door 200 can be suspended at the first angle, keeping the cabinet door 200 relatively stable at that angle, facilitating operations such as loading and unloading. When it is necessary to close the door, an external force is applied to make the limiting part 411 rise again and abut against the support platform 310, and the return drive component 500 can then automatically drive the cabinet door 200 to close.

[0038] The characteristic of worm gear drives is their self-locking property, meaning that when the worm stops rotating, the worm cannot rotate on its own. In this embodiment, the adjusting worm 610 is used to adjust the torque of the return drive 500 on the lifting component 400. By rotating the adjusting worm 610, the adjusting worm 620 can be driven to rotate, which in turn drives the return drive 500 to twist, achieving stepless adjustment of the torque. Furthermore, due to the self-locking property of the worm gear, once the adjustment is completed, the torque will remain unchanged until it is adjusted again.

[0039] The first end of the return drive 500 is fixed to the lifting member 400 to ensure that the torque can be transmitted to the cabinet door 200; the second end is circumferentially positioned with the adjusting turbine 620 but can move up and down relative to it. This design allows the return drive 500 to maintain synchronous rotation with the adjusting turbine 620 when adjusting the torque, while also accommodating the up and down movement of the lifting member 400.

[0040] like Figures 2-6As shown, the second end of the return driving member 500 is fixed with a transmission seat 510, which is positioned in the circumference of the adjusting turbine 620 and can move up and down relative to the adjusting turbine 620. On one hand, the transmission seat 510 is positioned in the circumference of the adjusting turbine 620, which ensures that the two can keep synchronous when rotating; on the other hand, the transmission seat 510 can move up and down relative to the adjusting turbine 620 to adapt to the movement requirement of the lifting member 400. In order to realize the relative movement between the transmission seat 510 and the adjusting turbine 620, the connecting part between the two needs to be designed with a certain gap, and in the transmission process, a larger contact surface or more contact points can be formed between the transmission seat 510 and the adjusting turbine 620, so that the transmission relationship between the two is more stable and reliable. The introduction of the transmission seat 510 has significantly improved the performance of the entire return device, including the torsion transmission efficiency, system stability and durability, etc.

[0041] In other optional embodiments, there can also be no transmission seat 510, and the second end of the return driving member 500 directly cooperates with the adjusting turbine 620. For example, the return driving member 500 is a steel wire with a square cross section, and the middle part of the adjusting turbine 620 is provided with a square hole to cooperate with the steel wire, so that the steel wire can move up and down relative to the adjusting turbine 620, and the adjusting turbine 620 can also drive the steel wire to twist.

[0042] As shown in Figures 3-6 The outer side of the transmission seat 510 has a first circumferential positioning structure, the adjusting turbine 620 has an assembly hole with a second circumferential positioning structure on the hole wall to cooperate with the first circumferential positioning structure, and the height of the first circumferential positioning structure is greater than the thickness of the adjusting turbine 620. The height of the first circumferential positioning structure is designed to be greater than the thickness of the adjusting turbine 620, so that the first circumferential positioning structure rises and falls relative to the second circumferential positioning structure, both of which can keep the transmission connection state, so that the cabinet door 200 is in the open state or the closed state, and the torsion of the return driving member 500 can be adjusted to improve the convenience of operation.

[0043] As shown in Figures 3-6As shown, the return driving member 500 is a steel wire, the transmission seat 510 is provided with a cylindrical hole 511, the return driving member 500 passes through the cylindrical hole 511, and the lower end of the return driving member 500 is provided with a blocking part 520 to prevent the return driving member 500 from passing upward through the cylindrical hole 511. The cylindrical hole 511 is a square hole, and the cross section of the steel wire is also square, and the two are in circumferential transmission cooperation. The blocking part 520 is integrally connected to the steel wire and is formed by hammering the end of the steel wire outward or bending the end of the steel wire. The upward movement of the steel wire can drive the upward movement of the transmission seat 510. In other alternative embodiments, the steel wire can also be in interference fit with the transmission seat 510, and in this case, the end of the steel wire can not have the blocking part 520. In other alternative embodiments, the return driving member 500 can also be a torsion spring or a return device.

[0044] As shown, Figure 3 , the upper end of the transmission seat 510 abuts against the lifting member 400. The blocking part 520 and the lifting member 400 form clamping fixation of the transmission seat 510, and the lifting member 400 can drive the transmission seat 510 to move downward together. In other alternative embodiments, the upper end of the transmission seat 510 and the lifting member 400 can also have a gap, and the transmission seat 510 can move downward based on the gravity of the transmission seat 510 or the friction between the transmission seat 510 and the steel wire.

[0045] Further, the position where the first circumferential positioning structure of the transmission seat 510 is located gradually increases in outer diameter from top to bottom, which is beneficial to the smoothness of the lifting of the transmission seat 510 relative to the adjusting turbine 620. The lower end of the transmission seat 510 is provided with a guiding part 513 which gradually decreases in outer diameter from top to bottom, which facilitates the assembly of the transmission seat 510 and the adjusting turbine 620. In other alternative embodiments, the position where the first circumferential positioning structure of the transmission seat 510 is located can also have consistent outer diameter from top to bottom. The outer diameter referred to herein refers to the diameter of the circumscribed circle.

[0046] As shown, Figure 10 , 11 , the second circumferential positioning structure is a circular arc rib 621, and the first circumferential positioning structure is a circular arc groove 512. The central angle of the cross section of the circular arc rib 621 is 120-240 degrees, Figure 10 , and the central angle shown is 182 degrees. In this embodiment, there are eight circular arc ribs 621, and in other alternative embodiments, the number of circular arc ribs 621 can also be five, six, nine, etc. In other alternative embodiments, as shown, Figure 12 , 13 , the first circumferential positioning structure can also be a circular arc rib 621, and the second circumferential positioning structure can be a circular arc groove 512. The cooperation of the circular arc rib 621 and the circular arc groove 512 enables them to stably maintain circular arc surface contact and improve transmission stability.

[0047] In other alternative embodiments, the first circumferential positioning structure is a keyway, spline, toothed profile, or other form of protrusion or recess that matches a second circumferential positioning structure on the adjusting turbine 620. The second circumferential positioning structure corresponds to the first circumferential positioning structure on the transmission seat 510, and can ensure synchronization and stability during rotation.

[0048] As shown in Figure 4 , 7 , the support table 310 and the limiting portion 411 have a guide slope 330. When the lifting piece 400 rotates relative to the lower seat 300 in a first direction, the guide slope 330 causes the lifting piece 400 to move upward relative to the lower seat 300, and the limiting portion 411 moves from the limiting groove 320 to the upper end of the support table 310. This facilitates the release of the hovering state of the cabinet door 200, so that the return driving piece 500 can drive the cabinet door 200 to automatically close.

[0049] Further, a limiting structure is provided between the lifting piece 400 and the lower seat 300 to limit the rotation angle of the lifting piece 400 relative to the lower seat 300. Specifically, the limiting structure includes a first limiting wall 340 at one end of the support table 310 and a second limiting wall 412 at one end of the limiting portion 411. The first limiting wall 340 and the second limiting wall abut to prevent the lifting piece 400 from rotating relative to the lower seat 300 in a second direction. The first limiting wall 340 and the second limiting wall 412 are vertical walls. The function of the limiting structure is to limit the rotation angle of the lifting piece 400 relative to the lower seat 300, prevent the cabinet door 200 from being opened too much, for example, limit the maximum opening angle of the cabinet door 200 to 120 degrees, and ensure the stability of the cabinet door 200 within a certain angle, preventing accidental damage. An angle less than or equal to 5 degrees with a vertical plane can be considered a vertical wall, which has good limiting effect. Of course, in other alternative embodiments, the angle between the first limiting wall 340 and the second limiting wall 412 relative to the vertical plane can also be greater than 5 degrees, as long as it can prevent the cabinet door 200 from being opened further.

[0050] As shown in Figure 3 , the lower seat 300 is provided with a mounting groove 350, and the support table 310 is located in the mounting groove 350. The lifting piece 400 has a mounting column 413, and the limiting portion 411 is located on the mounting column 413. The mounting column 413 is embedded in the mounting groove 350. The groove wall of the mounting groove 350 can form a transverse constraint on the lifting piece 400, so that the relative position of the lower seat 300 and the lifting piece 400 is more stable, and the lifting of the lifting piece 400 is also more stable.

[0051] As shown in Figure 3 ,4 As shown in Figs. 8, 9, the bottom cover 360 is fixed on the lower seat 300, one end of the bottom cover 360 is provided with a positioning rib 361, the lower seat 300 is provided with a positioning groove 362 matched with the positioning rib 361, the adjusting worm 610 is located between the bottom cover 360 and the lower seat 300, and the bottom cover 360 is provided with a clearance hole 363 corresponding to the adjusting worm 610. One end of the bottom cover 360 is provided with a positioning rib 361, and the lower seat 300 is provided with a positioning groove 362 matched with the positioning rib 361. This design ensures the accurate positioning of the bottom cover 360 on the lower seat 300, preventing the bottom cover 360 from being offset or rotated during assembly or use. The bottom cover 360 is provided with a clearance hole 363 corresponding to the adjusting worm 610, which is to ensure that the worm can rotate smoothly between the bottom cover 360 and the lower seat 300 without being hindered by the bottom cover 360.

[0052] The lifting member 400 includes a reinforcing plate 420, an upper seat body 410 fixed on the reinforcing plate 420, a sleeve 430 fixed on the upper seat body 410, the upper end of the steel wire is fixed on the sleeve 430, and the reinforcing plate 420 is fixed on the cabinet door 200. The mounting column 413 and the limiting part 411 are located on the upper seat body 410, the cabinet door 200 and the lifting member 400 are lifted together, the relatively heavy cabinet door 200 can make the cabinet door 200 be in a hovering state more stably, pushing the cabinet door 200 can also make the lifting member 400 and the cabinet door 200 rise together to release the hovering state, so that the steel wire can drive the cabinet door 200 to automatically close. The lifting member 400 of the embodiment is an assembly formed by assembling various parts, and in other optional embodiments, the lifting member 400 can also be a one-piece.

Claims

1. An adjustable torsion return device for a cabinet door, characterized by, The application relates to a regression driving device, which comprises a regression driving element (500), a lower seat (300) and a lifting element (400) capable of moving up and down relative to the lower seat (300), wherein the lower seat (300) is provided with a supporting table (310) and a limiting groove (320), and the lifting element (400) is provided with a limiting part (411) and is rotatably arranged relative to the lower seat (300) so that the limiting part (411) abuts against the upper end of the supporting table (310) or is embedded in the limiting groove (320). The lower seat (300) is provided with an adjusting worm (610) and an adjusting turbine (620), the first end of the regression driving element (500) is fixed with the lifting element (400), and the second end is circumferentially positioned with the adjusting turbine (620) and is capable of moving up and down relative to the adjusting turbine (620).

2. A cabinet door adjustable torsion return device as defined in claim 1 wherein, The second end of the regression driving element (500) is fixed with a transmission seat (510), the transmission seat (510) is circumferentially positioned with the adjusting turbine (620) and is capable of moving up and down relative to the adjusting turbine (620). The outer side of the transmission seat (510) is provided with a first circumferential positioning structure, the adjusting turbine (620) is provided with an assembly hole, the hole wall of the assembly hole is provided with a second circumferential positioning structure matched with the first circumferential positioning structure, and the height of the first circumferential positioning structure is greater than the thickness of the adjusting turbine (620).

3. A cabinet door adjustable torsion return device as defined in claim 2 wherein, The regression driving element (500) is a steel wire, the transmission seat (510) is provided with a cylindrical hole (511), the regression driving element (500) passes through the cylindrical hole (511), and the lower end of the regression driving element (500) is provided with a blocking part (520) for preventing the regression driving element (500) from upwardly passing through the cylindrical hole (511).

4. A cabinet door adjustable torsion return device as defined in claim 2 wherein, The upper end of the transmission seat (510) abuts against the lifting element (400).

5. A cabinet door adjustable torsion return device as defined in claim 2 wherein, The first circumferential positioning structure is located at a position with gradually increasing outer diameter from top to bottom, and the lower end of the transmission seat (510) is provided with a guiding part (513) with gradually decreasing outer diameter from top to bottom.

6. A cabinet door adjustable torsion return device as defined in claim 5 wherein, One of the first circumferential positioning structure and the second circumferential positioning structure is a circular-arc rib (621), and the other is a circular-arc groove (512), and the central angle of the cross section of the circular-arc rib (621) is 120-240 degrees.

7. A cabinet door adjustable torsion return device as defined in claim 1 wherein, The supporting table (310) and / or the limiting part (411) are provided with a guiding inclined surface (330), when the lifting element (400) rotates relative to the lower seat (300) in a first direction, the guiding inclined surface (330) enables the lifting element (400) to move upward relative to the lower seat (300), and the limiting part (411) moves from the limiting groove (320) to the upper end of the supporting table (310).

8. A cabinet door adjustable torsion return device as defined in claim 7 wherein, Limiting structures are arranged between the lifting element (400) and the lower seat (300) to limit the rotation angle of the lifting element (400) relative to the lower seat (300). The limiting structure comprises a first limiting wall (340) located at one end of the support table (310) and a second limiting wall (412) located at one end of the limiting part (411), and the first limiting wall (340) and the second limiting wall abut to prevent the lifting piece (400) from rotating relative to the lower seat (300) in a second direction. The first limiting wall (340) and the second limiting wall (412) are vertical walls.

9. A cabinet door adjustable torsion return device as defined in claim 7 wherein, The lower seat (300) is provided with a mounting groove (350), the support table (310) is located in the mounting groove (350), the lifting piece (400) has a mounting column (413), the limiting part (411) is located on the mounting column (413), and the mounting column (413) is embedded in the mounting groove (350). The lower seat (300) is fixed with a bottom cover (360), one end of the bottom cover (360) is provided with a positioning rib (361), the lower seat (300) is provided with a positioning groove (362) matched with the positioning rib (361), the adjusting worm (610) is located between the bottom cover (360) and the lower seat (300), and the bottom cover (360) has a gap hole (363) corresponding to the adjusting worm (610).

10. A storage cabinet characterized by, The regression device comprises the box body (100) and the cabinet door (200), the lower seat (300) is fixed on the box body (100), and the lifting piece (400) is fixed on the cabinet door (200).

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