A labor-saving and silent push-rebound opening and closing device for furniture

Abstract

A labor-saving and silent push-rebound opening and closing device for furniture includes a rebound bracket, a push element, and a push element. The rebound bracket is provided with a circular groove, the push element is provided with a sliding shaft portion, the push element elastically telescopically limits the sliding on the push element and / or the rebound bracket, and acts and drives the sliding shaft portion to position and / or slide along the trajectory of the circular groove in a sequential direction when sliding, and also includes a lever assembly, the lever assembly is provided with a lever action portion, the push element is provided with a pushing action portion, and the circular groove is provided with at least an upper limit sliding area, a conversion area, and a front stop area; when the sliding shaft portion slides on the upper limit sliding area, it acts and drives the pressing element and the pushing element to slide out of the rebound bracket, the sliding shaft portion slides to a certain position on the upper limit sliding area and separates from the pressing element, and the pushing element interacts with the lever action portion through the pushing action portion when the sliding shaft portion and the pressing element separate. The present invention has strong practicality through the improvement of the above structure.

Description

Technical Field

[0001] The invention relates to a labor-saving and noise-free pressing and rebounding opening and closing device for furniture. Background Art

[0002] Chinese patent document No. CN107411385A disclosed on April 14, 2017 a furniture automatic reset type push-and-rebound mechanism, which includes a furniture movable part, a furniture fixed part, a connecting element and a fixed bracket, the furniture movable part is movably opened and closed on the furniture fixed part, the fixed bracket is provided with a push-and-rebound device, a telescopic reset device and at least two rotating wheels, the push-and-rebound device at least includes a pushing element, the telescopic reset device at least includes a telescopic element and a first elastic element elastically matched with each other, the pushing element and the telescopic element slide on the fixed bracket respectively, at least two rotating wheels are relatively independently arranged and rotated on the fixed bracket respectively, at least two rotating wheels are linked and matched with each other when rotating to a certain position, one of the rotating wheels is driven and connected to the telescopic element, and the other rotating wheel is driven and connected to the pushing element; a swinging element is provided on the pushing element, and a heart-shaped slide groove is provided on the fixed bracket, the swinging element swings on the pushing element, and one end thereof slides in sequence along the track of the heart-shaped slide groove in one direction when the pushing element slides. When pressing to open, this structure must overcome the elasticity of the third elastic element so that the pushing element can slide open along the trajectory of the heart-shaped slide groove. Since the third elastic element has high elasticity, the user needs to apply the same force when pressing, resulting in the user having to use greater force to press open the furniture. At the same time, since the connection between the components in the press-rebound mechanism is less compact, collisions will always occur between the components when opening or closing, resulting in various abnormal noises during the opening and closing process of the furniture, which reduces the service life of the product and affects the user experience. Further improvements are necessary. Summary of the invention

[0003] The purpose of the present invention is to provide a labor-saving, silent, push-rebound opening and closing device for furniture with a simple and reasonable structure, low manufacturing cost, reliable performance, compact connection between components, quiet opening and closing process, no abnormal noise, high flexibility and long service life, so as to overcome the shortcomings of the prior art.

[0004] A labor-saving and silent push-rebound opening and closing device for furniture designed for this purpose comprises a rebound bracket, a pushing element and a pressing element. The rebound bracket is provided with a circular groove, the pushing element is provided with a sliding shaft portion, the pressing element elastically telescopes and limits the sliding on the pushing element and / or the rebound bracket, and acts and drives the sliding shaft portion to position and / or slide along the trajectory of the circular groove in a sequential direction when sliding. The device is characterized in that it also includes a lever assembly, which is respectively connected to the rebound bracket and the pressing element, and is also provided with a lever action portion, the pushing element is provided with a pushing action portion, and the circular groove is provided with at least an upper limit sliding area, a conversion area and a front stop area which are interconnected.

[0005] When the sliding shaft portion slides on the upper limit sliding area, it acts and drives the pressing element and the pushing element to slide and extend out of the rebound bracket. The sliding shaft portion slides on the upper limit sliding area to a certain position and disengages from the pressing element. When the sliding shaft portion and the pressing element are disengaged, the pushing element interacts with the lever action portion through the pushing action portion. The lever assembly moves on the rebound bracket through the action of the pushing element, and drives the pressing element and the pushing element to continue to slide and extend out of the rebound bracket. When the pushing element continues to slide and extend on the rebound bracket, it drives the sliding shaft portion to buffer and slide from the upper limit sliding area to the conversion area and stay in the front staying area; wherein, the pushing element and the pressing element are extended and positioned outside the rebound bracket when the sliding shaft portion stays in the front staying area.

[0006] The conversion area is composed of at least one zigzag section, and its two ends are respectively connected to the upper limit sliding area and the front stop area, and a certain angle is formed between the conversion area and the upper limit sliding area and / or the front stop area.

[0007] The circular groove is provided with a lower limit sliding area, which is interconnected with the front stop area and forms a certain angle with the conversion area.

[0008] When the pushing element slides into the rebound bracket, it interacts with the lever acting part through the pushing action part. The lever assembly moves on the rebound bracket through the action of the pushing element, and drives the pressing element and the pushing element to slide into the rebound bracket. When the pushing element slides into the rebound bracket, it drives the sliding shaft part to slide from the front stop area to the lower limit sliding area. The sliding shaft part slides to a certain position on the lower limit sliding area, interacts with the pressing element, and drives the pressing element and the pushing element to continue to slide into the rebound bracket. The pushing action part disengages from the lever acting part when the sliding shaft part and the pressing element act.

[0009] At least one bending section is arranged between the push action part and the lever action part, and the push action part and the lever action part interact with each other through the at least one bending section.

[0010] The lever assembly includes a first lever and a second lever; wherein, one end of the first lever is rotatably set on the rebound bracket, and the other end is provided with a lever action part that interacts or disengages with the push action part; one end of the second lever is rotatably set on the first lever, and the other end is rotatably set on the pressing element.

[0011] The return groove is provided with a rear stop area; the upper limit sliding area, the conversion area, the front stop area, the lower limit sliding area, and the rear stop area are interconnected end to end and together constitute the return groove.

[0012] When the pressing element continues to slide into the rebound bracket, it acts and drives the sliding shaft portion to slide from the lower limit sliding area and stay in the rear staying area; wherein, the pushing element and the pressing element extend into and are positioned in the rebound bracket when the sliding shaft portion stays in the rear staying area.

[0013] The rear stop area is heart-shaped, and the left and right side walls are respectively provided with inclined parts; the pressing element is provided with a rear area sliding guide part, and interacts with or separates from the sliding shaft part through the rear area sliding guide part.

[0014] When the pushing element slides into the rebound bracket, it interacts with the lever acting part through the pushing action part. The lever assembly moves on the rebound bracket through the action of the pushing element, and drives the pressing element and the pushing element to slide into the rebound bracket. When the pushing element slides into the rebound bracket, it drives the sliding shaft part to slide from the front stop area to the lower limit sliding area. The sliding shaft part slides to a certain position on the lower limit sliding area and interacts with the rear area sliding into the guide part and drives the pressing element and the pushing element to continue to slide into the rebound bracket. The pushing action part disengages from the lever acting part when the sliding shaft part and the rear area sliding into the guide part act.

[0015] When the pressing element continues to slide into the rebound bracket, it is acted upon by the rear area sliding-in guide portion and drives the sliding shaft portion to slide obliquely from the lower limit sliding area and stay in the rear staying area; wherein, when the sliding shaft portion stays in the rear staying area, it disengages from the rear area sliding-in guide portion, and the pushing element and the pressing element extend into and are positioned in the rebound bracket when the sliding shaft portion stays in the rear staying area.

[0016] A pressing elastic member is arranged between the pushing element and the rebound bracket, one end of the pressing elastic member is elastically connected to the pushing element, and the other end is elastically connected to the rebound bracket; the pressing element is also provided with a rear area sliding guide portion, and interacts or disengages with the sliding shaft portion through the rear area sliding guide portion.

[0017] When the sliding shaft portion stays in the rear stop area and the pressing element presses and slides relative to the rebound bracket, the pressing element acts through the rear area slide-out guide portion and drives the sliding shaft portion to slide out from the rear stop area to the upper limit sliding area.

[0018] When the sliding shaft portion slides on the upper limit sliding area, it acts on the sliding guide portion in the rear area, and the pressing element and the pushing element slide and extend out of the rebound bracket through the action of the sliding shaft portion. The sliding shaft portion slides to a certain position on the upper limit sliding area and disengages from the sliding guide portion in the rear area. When the sliding shaft portion and the sliding guide portion in the rear area are disengaged, the pushing element interacts with the lever action portion through the pushing action portion. The lever assembly moves on the rebound bracket through the action of the pushing element, and drives the pressing element and the pushing element to continue to slide and extend out of the rebound bracket. When the pushing element continues to slide and extend on the rebound bracket, it drives the sliding shaft portion to buffer and slide from the upper limit sliding area to the conversion area and stay in the front staying area; wherein, the pushing element and the pressing element are extended and positioned outside the rebound bracket when the sliding shaft portion stays in the front staying area.

[0019] A limiting portion is provided on the pressing element, a limiting matching portion is provided on the pushing element, and a sliding elastic member is further provided between the pressing element and the pushing element, one end of the sliding elastic member is elastically connected to the pressing element, and the other end is elastically connected to the pushing element; the pressing element is elastically telescopically limited and slid on the limiting matching portion of the pushing element always in the direction of the rear stop area through the cooperation of the limiting portion and the sliding elastic member; the elastic force generated by the pressing elastic member is greater than the elastic force generated by the sliding elastic member.

[0020] The device also includes a movable component that moves relative to the rebound bracket, wherein the movable component drives the lever assembly to rotate on the rebound bracket when it moves in the direction of the rebound bracket, and separates from the lever assembly to avoid air when the movable component moves in the opposite direction of the rebound bracket.

[0021] The present invention has the following advantages compared with the prior art through the improvement of the above structure:

[0022] 1. Before the sliding shaft part enters the conversion area, it is separated from the pressing element, and only relies on the cooperation between the lever action part and the pushing action part to realize that the pushing element and the pressing element are extended and positioned outside the rebound bracket. Therefore, the collision and abnormal noise generated when the sliding shaft part stays in the front stop area can be reduced, and the sliding shaft part can slide into and stay in the front stop area without collision, abnormal noise and silently, thereby avoiding the rebound bracket, the pushing element, and the pressing element. The loose assembly between the components is avoided due to inaccurate production size and assembly position, and the collision and abnormal noise occur when the sliding shaft part slides into and stays in the front stop area. The compactness of the connection between the components and the service life of the product are improved, and at the same time, the unnecessary contact between the sliding shaft part and the pressing element can be reduced, thereby improving the service life of the product.

[0023] 2. The conversion area is composed of at least one tortuous section, which can not only guide the sliding shaft part to slide into and stay in the front staying area without collision, abnormal sound and silently, but also because a certain angle is formed between the conversion area and the upper limit sliding area and the lower limit sliding area, the sliding shaft part can only slide along the trajectory of the circular groove in a sequential direction during operation, thereby avoiding the problem that the sliding shaft part of the prior art cannot be positioned on the pushing element, and is easily displaced on the pushing element during transportation or use, causing the sliding shaft part to be stuck on the pushing element and unable to be positioned and slide along the trajectory of the circular groove, thereby making the product more stable in use.

[0024] 3. When the sliding shaft slides to a certain position on the lower limit sliding area, it interacts with the pressing element. At this time, the lever action part is separated from the push action part, which not only reduces unnecessary contact between the lever action part and the push action part, thereby further improving the service life of the product, but also improves the interaction effect between the sliding shaft part and the pressing element, so that the sliding shaft part and the pressing element can interact with each other without collision, abnormal sound, and silently, thereby further improving the silent opening and closing effect of the product, and further improving the user experience.

[0025] 4. The sliding shaft part is guided to slide obliquely from the lower limit sliding area and stay in the rear staying area through the action of the rear area sliding-out guide part, and is guided to slide out from the rear staying area to the upper limit sliding area through the action of the rear area sliding-out guide part. The sliding shaft part can achieve an oblique guided sliding effect in this sliding process, thereby avoiding the sliding shaft part being stuck in the circular groove due to the assembly position relationship, and the problem of damage to the sliding shaft part caused by the user forcibly driving the pressing element to slide into the rebound bracket. At the same time, the sliding shaft part can also improve the sliding in and out effect of the sliding shaft part in the rear staying area, and can slide in and out of the rear staying area without collision, abnormal noise and silently.

[0026] 5. When the pushing element and the pressing element are closed relative to the rebound bracket, they can slide into the guide part and the sliding shaft part through the rear area to offset the opening elastic force of the pressing elastic part on the pushing element, so that the pushing element and the pressing element can automatically slide into and position in the rebound bracket through their own inertia; when the pushing element and the pressing element slide out and open relative to the rebound bracket, the closing elastic force of the pressing elastic part on the pushing element can be offset by the guiding cooperation of the sliding guide part and the sliding shaft part in the rear area, so that the user can use less pressing force to drive the pushing element and the pressing element to automatically slide out and position outside the rebound bracket, thereby greatly satisfying the user's usage needs.

[0027] In general, it has the characteristics of simple and reasonable structure, low manufacturing cost, reliable performance, compact connection between components, quiet and no abnormal noise during opening and closing, high flexibility and long service life, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 , Figure 2 FIG. 1 is a schematic diagram of the exploded structure of the first embodiment of the present invention.

[0029] Figure 3 Schematic diagram of the structure of the serpentine groove according to the first embodiment of the present invention.

[0030] Figure 4 FIG. 1 is a schematic diagram of the structure of a pressing element according to the first embodiment of the present invention.

[0031] Figure 5-Figure 13 It is a schematic diagram of the sliding process of the pushing element and the pressing element relative to the rebound bracket according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] See also Figure 1-Figure 13 The furniture adopts a labor-saving and silent push-rebound opening and closing device, which includes a rebound bracket 1, a pushing element 2, a pressing element 3, and a lever assembly. The rebound bracket 1 is provided with a circular groove 4, and the pushing element 2 is provided with a sliding shaft portion 5. The pressing element 3 elastically telescopes and slides on the pushing element 2 and / or the rebound bracket 1, and acts and drives the sliding shaft portion 5 to position and / or slide along the trajectory of the circular groove 4 in a sequential direction when sliding.

[0034] The lever assembly is respectively connected with the rebound bracket 1 and the pressing element 3, and is also provided with a lever action part 6, the pushing element 2 is provided with a pushing action part 7, and the circular groove 4 is provided with at least an upper limit sliding area 8, a conversion area 9 and a front stop area 10 which are interconnected.

[0035] When the sliding shaft portion 5 slides on the upper limit sliding area 8, it acts and drives the pressing element 3 and the pushing element 2 to slide and extend out of the rebound bracket 1. The sliding shaft portion 5 slides on the upper limit sliding area 8 to a certain position and disengages from the pressing element 3. When the sliding shaft portion 5 and the pressing element 3 are disengaged, the pushing element 2 interacts with the lever action portion 6 through the pushing action portion 7. The lever assembly moves on the rebound bracket 1 through the action of the pushing element 2, and drives the pressing element 3 and the pushing element 2 to continue to slide and extend out of the rebound bracket 1. When the pushing element 2 continues to slide and extend on the rebound bracket 1, it drives the sliding shaft portion 5 to buffer and slide from the upper limit sliding area 8 to the conversion area 9 and stay in the front stop area 10; wherein, the pushing element 2 and the pressing element 3 are extended and positioned outside the rebound bracket 1 when the sliding shaft portion 5 stays in the front stop area 10.

[0036] The conversion area 9 is composed of at least one zigzag section, and its two ends are respectively connected to the upper limit sliding area 8 and the front stop area 10 . A certain angle a is formed between the conversion area 9 and the upper limit sliding area 8 and / or the front stop area 10 .

[0037] A lower limit sliding area 11 is provided on the circular groove 4 . The lower limit sliding area 11 is connected to the front stop area 10 and forms a certain angle b with the conversion area 9 .

[0038] When the pushing element 2 slides into the rebound bracket 1, it interacts with the lever action part 6 through the pushing action part 7. The lever assembly moves on the rebound bracket 1 through the action of the pushing element 2, and drives the pressing element 3 and the pushing element 2 to slide into the rebound bracket 1. When the pushing element 2 slides into the rebound bracket 1, it drives the sliding shaft part 5 to slide from the front stop area 10 to the lower limit sliding area 11. The sliding shaft part 5 slides on the lower limit sliding area 11 to a certain position to interact with the pressing element 3 and drive the pressing element 3 and the pushing element 2 to continue to slide into the rebound bracket 1. The pushing action part 7 disengages from the lever action part 6 when the sliding shaft part 5 and the pressing element 3 act.

[0039] At least one bending section is provided between the push-action part 7 and the lever action part 6 , and the push-action part 7 and the lever action part 6 interact with each other through the at least one bending section.

[0040] The lever assembly includes a first lever 12 and a second lever 13; wherein, one end of the first lever 12 is rotatably set on the rebound bracket 1, and the other end is provided with a lever action part 6 that interacts or disengages with the push action part 7; one end of the second lever 13 is rotatably set on the first lever 12, and the other end is rotatably set on the pressing element 3.

[0041] The return groove 4 is provided with a rear stop area 14 ; the upper limit sliding area 8 , the conversion area 9 , the front stop area 10 , the lower limit sliding area 11 , and the rear stop area 14 are interconnected end to end and together constitute the return groove 4 .

[0042] As the pressing element 3 continues to slide into the rebound bracket 1, it acts and drives the sliding shaft portion 5 to slide from the lower limit sliding area 11 and stay in the rear staying area 14; wherein, the pushing element 2 and the pressing element 3 extend into and are positioned in the rebound bracket 1 when the sliding shaft portion 5 stays in the rear staying area 14.

[0043] The rear stop area 14 is heart-shaped, and the left and right side walls are respectively provided with inclined parts; the pressing element 3 is provided with a rear area sliding guide part 15, and interacts with or separates from the sliding shaft part 5 through the rear area sliding guide part 15.

[0044] When the pushing element 2 slides into the rebound bracket 1, it interacts with the lever action part 6 through the pushing action part 7. The lever assembly moves on the rebound bracket 1 through the action of the pushing element 2, and drives the pressing element 3 and the pushing element 2 to slide into the rebound bracket 1. When the pushing element 2 slides into the rebound bracket 1, it drives the sliding shaft part 5 to slide from the front stop area 10 to the lower limit sliding area 11. The sliding shaft part 5 slides on the lower limit sliding area 11 to a certain position and interacts with the rear area sliding guide part 15 and drives the pressing element 3 and the pushing element 2 to continue to slide into the rebound bracket 1. The pushing action part 7 disengages from the lever action part 6 when the sliding shaft part 5 and the rear area sliding guide part 15 act.

[0045] When the pressing element 3 continues to slide into the rebound bracket 1, it is acted upon by the rear area sliding-in guide portion 15 and drives the sliding shaft portion 5 to slide obliquely from the lower limit sliding area 11 and stay in the rear staying area 14; wherein, when the sliding shaft portion 5 stays in the rear staying area 14, it disengages from the rear area sliding-in guide portion 15, and the pushing element 2 and the pressing element 3 extend into and are positioned in the rebound bracket 1 when the sliding shaft portion 5 stays in the rear staying area 14.

[0046] A pressing elastic member 16 is arranged between the pushing element 2 and the rebound bracket 1, one end of the pressing elastic member 16 is elastically connected to the pushing element 2, and the other end is elastically connected to the rebound bracket 1; the pressing element 3 is also provided with a rear area sliding guide portion 17, and interacts with or disengages from the sliding shaft portion 5 through the rear area sliding guide portion 17.

[0047] When the sliding shaft portion 5 stays in the rear staying area 14 and the pressing element 3 presses and slides relative to the rebound bracket 1, the pressing element 3 acts through the rear area sliding guide portion 17 and drives the sliding shaft portion 5 to slide out from the rear staying area 14 to the upper limit sliding area 8 in an inclined manner.

[0048] When the sliding shaft portion 5 slides on the upper limit sliding area 8, it acts on the rear area slide-out guide portion 17, and the pressing element 3 and the pushing element 2 slide out of the rebound bracket 1 through the action of the sliding shaft portion 5. The sliding shaft portion 5 slides to a certain position on the upper limit sliding area 8 and disengages from the rear area slide-out guide portion 17. When the sliding shaft portion 5 and the rear area slide-out guide portion 17 are disengaged, the pushing element 2 interacts with the lever action portion 6 through the pushing action portion 7. The lever assembly moves on the rebound bracket 1 through the action of the pushing element 2, and drives the pressing element 3 and the pushing element 2 to continue to slide and extend out of the rebound bracket 1. When the pushing element 2 continues to slide and extend on the rebound bracket 1, it drives the sliding shaft portion 5 to buffer and slide from the upper limit sliding area 8 to the conversion area 9 and stay in the front stay area 10; wherein, the pushing element 2 and the pressing element 3 are extended and positioned outside the rebound bracket 1 when the sliding shaft portion 5 stays in the front stay area 10.

[0049] A limiting portion 18 is provided on the pressing element 3, a limiting matching portion 19 is provided on the pushing element 2, and a sliding elastic member 20 is also provided between the pressing element 3 and the pushing element 2, one end of the sliding elastic member 20 is elastically connected to the pressing element 3, and the other end is elastically connected to the pushing element 2; the pressing element 3 is elastically telescopically limited and slid on the limiting matching portion 19 of the pushing element 2 always in the direction of the rear stop area 14 through the cooperation of the limiting portion 18 and the sliding elastic member 20; the elastic force generated by the pressing elastic member 16 is greater than the elastic force generated by the sliding elastic member 20.

[0050] The device also includes a movable component 21 that moves relative to the rebound bracket 1, wherein the movable component 21 drives the lever assembly to rotate on the rebound bracket 1 when it moves in the direction of the rebound bracket 1, and separates from the lever assembly when it moves in the opposite direction of the rebound bracket 1.

[0051] The working principle of the movable part 21 is similar to an adjustment structure for furniture press rebound disclosed by the applicant with document number CN110074570A on August 2, 2019, and will not be repeated here.

[0052] The accompanying drawings are only for illustrative purposes and are schematic diagrams rather than actual drawings, and should not be construed as limitations on this patent. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0053] Moreover, the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "lateral", "longitudinal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships, they are all based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent.

Claims

1. A labor-saving and silent push-rebound opening and closing device for furniture, comprising a rebound bracket (1), a push element (2), and a pressing element (3), wherein the rebound bracket (1) is provided with a circular groove (4), the push element (2) is provided with a sliding shaft portion (5), the pressing element (3) elastically telescopically limits and slides on the pushing element (2) and / or the rebound bracket (1), and acts and drives the sliding shaft portion (5) to be positioned and / or slide along the track of the circular groove (4) in a sequential direction during sliding, characterized in that: The lever assembly also includes a lever assembly, which is respectively connected to the rebound bracket (1) and the pressing element (3), and is provided with a lever action portion (6). The pushing element (2) is provided with a pushing action portion (7), and the circular groove (4) is provided with at least an upper limit sliding area (8), a conversion area (9) and a front stop area (10) which are interconnected. When the sliding shaft portion (5) slides on the upper limit sliding area (8), it acts and drives the pressing element (3) and the pushing element (2) to slide out of the rebound bracket (1); the sliding shaft portion (5) slides on the upper limit sliding area (8) to a certain position and separates from the pressing element (3); when the pushing element (2) separates from the sliding shaft portion (5) and the pressing element (3), the pushing element (2) interacts with the lever action portion (6) through the pushing action portion (7); and the lever assembly moves in the rebound bracket (1) through the action of the pushing element (2). The push element (2) is mounted on the rebound bracket (1) and drives the pressing element (3) and the pushing element (2) to continue to slide and extend out of the rebound bracket (1); when the pushing element (2) continues to slide and extend on the rebound bracket (1), it drives the sliding shaft portion (5) to buffer and slide from the upper limit sliding area (8) to the conversion area (9) and stay in the front stop area (10); wherein, when the sliding shaft portion (5) stays in the front stop area (10), the pushing element (2) and the pressing element (3) are extended and positioned outside the rebound bracket (1); The circular groove (4) is provided with a lower limit sliding area (11), the lower limit sliding area (11) is interconnected with the front stop area (10), and forms a certain first angle (b) with the conversion area (9); When the push element (2) slides into the rebound bracket (1), the push action part (7) interacts with the lever action part (6); the lever assembly moves on the rebound bracket (1) through the action of the push element (2) and drives the pressing element (3) and the push element (2) to slide into the rebound bracket (1); when the push element (2) slides into the rebound bracket (1), the sliding shaft part (5) is driven to slide from the front stop area (10) to the lower limit sliding area (11); the sliding shaft part (5) slides to a certain position on the lower limit sliding area (11) to interact with the pressing element (3) and drive the pressing element (3) and the push element (2) to continue to slide into the rebound bracket (1); the push action part (7) is separated from the lever action part (6) when the sliding shaft part (5) and the pressing element (3) act; The circular groove (4) is provided with a rear stop area (14); the upper limit sliding area (8), the conversion area (9), the front stop area (10), the lower limit sliding area (11), and the rear stop area (14) are connected to each other end to end and together constitute the circular groove (4); When the pressing element (3) continues to slide into the rebound bracket (1), it acts and drives the sliding shaft portion (5) to slide from the lower limit sliding area (11) and stay in the rear stop area (14); wherein, when the sliding shaft portion (5) stays in the rear stop area (14), the pushing element (2) and the pressing element (3) extend into and are positioned in the rebound bracket (1); The rear stop area (14) is heart-shaped, and the left and right side walls are respectively provided with inclined portions; the pressing element (3) is provided with a rear area sliding guide portion (15), and interacts with or separates from the sliding shaft portion (5) through the rear area sliding guide portion (15); When the push element (2) slides into the rebound bracket (1), the push action part (7) interacts with the lever action part (6). The lever assembly moves on the rebound bracket (1) through the action of the push element (2) and drives the pressing element (3) and the push element (2) to slide into the rebound bracket (1). When the push element (2) slides into the rebound bracket (1), the sliding shaft part (5) is driven to slide from the front stop area (10) to the lower limit sliding area (11). The sliding shaft part (5) slides to a certain position on the lower limit sliding area (11) and interacts with the rear area sliding guide part (15) and drives the pressing element (3) and the push element (2) to continue to slide into the rebound bracket (1). When the sliding shaft part (5) and the rear area sliding guide part (15) act, the push action part (7) is separated from the lever action part (6). When the pressing element (3) continues to slide into the rebound bracket (1), it is acted on by the rear area sliding guide (15) and drives the sliding shaft portion (5) to slide obliquely from the lower limit sliding area (11) and stay in the rear stop area (14); wherein, when the sliding shaft portion (5) stays in the rear stop area (14), it is separated from the rear area sliding guide (15), and when the sliding shaft portion (5) stays in the rear stop area (14), the push element (2) and the pressing element (3) extend into and are positioned in the rebound bracket (1); A pressing elastic member (16) is provided between the pushing element (2) and the rebound bracket (1), one end of the pressing elastic member (16) is elastically connected to the pushing element (2), and the other end is elastically connected to the rebound bracket (1); the pressing element (3) is also provided with a rear area sliding guide portion (17), and interacts with or separates from the sliding shaft portion (5) through the rear area sliding guide portion (17); When the sliding shaft portion (5) stays in the rear stop area (14) and the pressing element (3) presses and slides relative to the rebound bracket (1), the pressing element (3) acts through the rear area slide-out guide portion (17) and drives the sliding shaft portion (5) to slide out from the rear stop area (14) to the upper limit sliding area (8) in an inclined manner; The sliding shaft portion (5) acts on the rear area slide-out guide portion (17) when sliding on the upper limit sliding area (8), and the pressing element (3) and the pushing element (2) slide out of the rebound bracket (1) through the action of the sliding shaft portion (5). The sliding shaft portion (5) slides on the upper limit sliding area (8) to a certain position and is separated from the rear area slide-out guide portion (17). When the pushing element (2) is separated from the sliding shaft portion (5) and the rear area slide-out guide portion (17), the pushing element (2) interacts with the lever action portion (6) through the pushing action portion (7), and the lever assembly The push element (2) moves on the rebound bracket (1) through the action of the push element (2), and drives the pressing element (3) and the push element (2) to continue to slide and extend out of the rebound bracket (1); when the push element (2) continues to slide and extend on the rebound bracket (1), it drives the sliding shaft part (5) to slide from the upper limit sliding area (8) to the conversion area (9) and stay in the front stop area (10); wherein, when the sliding shaft part (5) stays in the front stop area (10), the push element (2) and the pressing element (3) extend and are positioned outside the rebound bracket (1); A limiting portion (18) is provided on the pressing element (3), a limiting matching portion (19) is provided on the pushing element (2), and a sliding elastic member (20) is also provided between the pressing element (3) and the pushing element (2); one end of the sliding elastic member (20) is elastically connected to the pressing element (3), and the other end is elastically connected to the pushing element (2); the pressing element (3) is elastically telescopically limited and slidable on the limiting matching portion (19) of the pushing element (2) in the direction of the rear stop area (14) through the matching of the limiting portion (18) and the sliding elastic member (20); the elastic force generated by the pressing elastic member (16) is greater than the elastic force generated by the sliding elastic member (20).

2. The labor-saving and silent push-rebound opening and closing device for furniture according to claim 1, characterized in that: The conversion area (9) is composed of at least one zigzag section, and its two ends are respectively connected to the upper limit sliding area (8) and the front stop area (10), and a certain second angle (a) is formed between the conversion area (9) and the upper limit sliding area (8) and / or the front stop area (10).

3. The labor-saving and silent push-rebound opening and closing device for furniture according to claim 1, characterized in that: At least one bending section is arranged between the push action part (7) and the lever action part (6), and the push action part (7) and the lever action part (6) interact with each other via the at least one bending section.

4. The labor-saving and noise-free push-rebound opening and closing device for furniture according to claim 1, characterized in that: The lever assembly comprises a first lever (12) and a second lever (13); wherein one end of the first lever (12) is rotatably mounted on the rebound bracket (1), and the other end is provided with a lever action part (6) that interacts with or disengages from the push action part (7); and one end of the second lever (13) is rotatably mounted on the first lever (12), and the other end is rotatably mounted on the pressing element (3).

5. The labor-saving and silent push-rebound opening and closing device for furniture according to any one of claims 1 to 4, characterized in that: It also comprises a movable component (21) movable relative to the rebound bracket (1), wherein when the movable component (21) moves in the direction of the rebound bracket (1), it drives the lever assembly to rotate on the rebound bracket (1), and when the movable component (21) moves in the opposite direction of the rebound bracket (1), it separates from the lever assembly to avoid air.

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