Furniture folding device with improved adjustment structure

Abstract

Furniture folding device with improved adjustment structure, comprising a housing (1) for connection to a cabinet body, a mounting element (2) for connection to a cabinet door, a pivot arm element (3) arranged on the housing (1), and a spring mechanism (4), wherein the pivot arm element (3) is pivotally connected to the housing (1) and the mounting element (2), wherein the spring mechanism (4) serves to provide an elastic force to the pivot arm element (3), characterized in that it further comprises an adjustment assembly, wherein the adjustment assembly serves to adjust the spring force exerted by the spring mechanism (4) on the pivot arm element (3);wherein the adjustment assembly comprises an adjustment part (5), a drive spindle (6) and a movement part (7), wherein the adjustment part (5) is rotatably arranged on the housing (1), the drive spindle (6) is in drive connection with the adjustment part (5), the movement part (7) is in thread engagement with the drive spindle (6), wherein one side of the movement part (7) rests against the spring mechanism (4) and the other side is provided with a limiting spring (8), wherein one end of the limiting spring (8) rests against the movement part (7) and the other end rests against the housing (1).

Description

Technical field The present utility model relates to the technical field of furniture fittings, in particular a furniture folding device with an improved adjustment structure. State of the art With the constant changes in living spaces and the diverse usage requirements of people, the efficient use of furniture in limited spaces has become an important subject of research; the folding door has emerged as a special form of cabinet door that can effectively save the installation space of furniture and is particularly suitable for the design of kitchen cabinets and similar furniture, thus meeting the users' requirements for space utilization and ease of use of furniture to a high degree. To ensure smooth opening and holding of the hinged door in the open position, conventional hinged door furniture is typically equipped with a support structure. The main body of this structure is located within the cabinet body, and the supporting part is connected to the cabinet door, thus exerting a supporting effect on the door when it is opened upwards. For example, Chinese patent CN108915445B discloses a durable and quiet hinged furniture structure in which an adjustment assembly is used to adjust the spring force of the spring mechanism to accommodate cabinet doors of varying weights. However, in this adjustment assembly, the sliding element can easily jam when reaching its limit position during the adjustment process, leading to adjustment failure and a detrimental user experience. Therefore, there is still room for improvement in the state of the art. Content of the utility model The purpose of the present utility model is to overcome the disadvantages of the prior art and to provide a furniture folding device with an improved adjustment structure in order to solve the technical problem of the slight jamming of the adjustment assembly during adjustment in the prior art. To solve the aforementioned problem, the following technical measures are taken in the present utility model: A furniture folding device with an improved adjustment structure, comprising a housing for connection to a cabinet body, a mounting element for connection to a cabinet door, a swivel arm element arranged on the housing, and a spring mechanism; wherein the swivel arm element is pivotally connected to both the housing and the mounting element to make the mounting element foldable relative to the housing. The spring mechanism serves to provide an elastic force to the swivel arm element; further comprising an adjustment assembly, wherein the adjustment assembly serves to adjust the spring force exerted by the spring mechanism on the swivel arm element. The adjustment assembly comprises an adjustment part, a drive spindle, and a movement part.The adjusting element is rotatably mounted on the housing. The drive spindle is connected to the adjusting element, and the moving element is threaded into the drive spindle. One side of the moving element rests against the spring mechanism, while the other side is equipped with a limiting spring. One end of the limiting spring rests against the moving element, and the other end rests against the housing. Preferably, the limiting spring is attached to the drive spindle. Preferably, the adjusting part comprises a rotary shaft and a helical gear part mounted on the rotary shaft, wherein the rotary shaft is rotatably arranged on the housing and the drive spindle has a helical gear section meshing with the helical gear part. Preferably, an actuating end is provided at each end of the rotating shaft, and a clearance groove is formed on the side surface of the housing at the position corresponding to the actuating end, so that a tool can be inserted into the clearance groove to set the actuating end in rotation. Preferably, the helical gear section meshes at right angles with the helical gear section of the drive spindle, so that the direction of rotation of the adjusting part is perpendicular to the axial direction of the drive spindle. Preferably, the spring mechanism comprises a storage spring, a first spring seat, and a second spring seat. The storage spring rests at both ends against the first and second spring seats, respectively. The first spring seat is in drive connection with the pivoting arm element, such that when the pivoting arm element pivots over the first spring seat, it compresses or releases the storage spring. The second spring seat rests against the moving part. Preferably, a positioning pin is provided on the side of the second spring seat facing the storage spring, and the storage spring is placed on the positioning pin. Preferably, the swivel arm element is pivotally connected to the housing via a first pivot pin, the swivel arm element is in drive connection with the first spring seat via a connecting rod, wherein a first joint bore is provided at one end of the connecting rod, which is pivotally connected to the swivel arm element via a second pivot pin, and a second joint bore is provided at the other end of the connecting rod, which is pivotally connected to the first spring seat via a third pivot pin. Preferably, the moving part is slidably inserted into the second spring seat, and the moving part has a threaded bore whose internal thread interacts with the external thread of the drive spindle. In comparison to the prior art, the present utility model offers the following advantageous effects: By arranging a limiting spring on the side of the moving part facing away from the spring mechanism, with one end of the limiting spring resting against the moving part and the other end resting against the housing, the limiting spring is compressed when the moving part is over-adjusted towards the housing up to the limit position, its elastic deformation absorbing the excessive adjustment travel of the moving part, preventing a rigid impact of the moving part against the housing and a resulting jamming, and ensuring that the adjustment assembly can always perform the spring force adjustment smoothly;The limiting spring moves in the axial direction of the drive spindle when compressed, with a stable path of movement and a reliable elastic buffer continuously provided, thereby effectively solving the problem of slight jamming of the adjustment assembly at the adjustment limit position in the prior art and improving the reliability and service life of the adjustment mechanism. Brief description of the drawings Fig. 1 is a perspective view of the present utility model. Fig. 2 is a structural view of the adjustment assembly of the present utility model. Fig. 3 is a structural view of the spring mechanism of the present utility model. Fig. 4 shows the interaction of the adjustment element with the drive spindle of the present utility model. Fig. 5 is an assembly view of the movement element with the second spring seat of the present utility model. Fig. 6 shows the connection of the three pivot points of the present utility model. In the drawings: 1, housing; 2, mounting element; 3, swivel arm element; 31, first pivot pin; 4, spring mechanism; 41, storage spring; 42, first spring seat; 43, second spring seat; 431, positioning pin; 5, adjusting part; 51, rotary shaft; 511, actuating end; 52, helical gear part; 6, drive spindle; 7, moving part; 71, threaded bore; 8, limit spring; 9, connecting rod; 91, first pivot bore; 92, second pivot pin; 93, second pivot bore; 94, third pivot pin. Detailed description of the embodiments With reference to Figs. 1, 2, 3, 4, 5 to 6, the present utility model provides a furniture folding device with an improved adjustment structure, comprising a housing 1, a mounting element 2, a swivel arm element 3, a spring mechanism 4 and an adjustment assembly; wherein the housing 1 serves for fixed mounting on a cabinet body (not shown in the drawings) and the mounting element 2 serves for connection with a cabinet door (not shown in the drawings). The swivel arm element 3 is articulatedly connected to the housing 1 and the mounting element 2, so that the mounting element 2 can be folded relative to the housing 1; the swivel arm element 3 is designed as a one-piece single-arm structure and enables the articulated connection with the housing 1 and the mounting element 2. The spring mechanism 4 serves to provide the pivot arm element 3 with an elastic force, so that the pivot arm element 3 has a tendency to open or close automatically. In the present embodiment, the spring mechanism 4 comprises a storage spring 41, a first spring seat 42, and a second spring seat 43. The storage spring 41 rests at both ends against the first spring seat 42 and the second spring seat 43, respectively. A positioning pin 431 is provided on the side of the second spring seat 43 facing the storage spring 41, and the storage spring 41 is mounted on the positioning pin 431 to ensure a stable path of movement for the storage spring 41 when compressed. A connecting rod 9 is arranged between the pivot arm element 3 and the first spring seat 42, serving to transmit the pivoting movement of the pivot arm element 3 to the spring mechanism 4. The connecting rod 9 has an elongated, plate-shaped structure and is pivotally connected at both ends to the pivot arm element 3 and the first spring seat 42. Specifically, the present device forms three essential pivot points between the housing 1, the pivot arm element 3, the connecting rod 9, and the first spring seat 42: First pivot point: pivot point between the pivot arm element 3 and the housing 1; the pivot arm element 3 is pivotally connected to the housing 1 via a first pivot pin 31, with this pivot point forming the pivot point of the pivot arm element 3, and the pivot arm element 3 performing a pivoting movement about this pivot point relative to the housing 1. Second pivot point: Pivot point between the connecting rod 9 and the pivot arm element 3; a first pivot bore 91 is provided at one end of the connecting rod 9, which is pivotally connected to the pivot arm element 3 via a second pivot pin 92; when the pivot arm element 3 pivots about the first pivot point, the second pivot point, together with the pivot arm element 3, executes an arc movement. Third pivot point: Pivot point between the connecting rod 9 and the first spring seat 42; a second pivot bore 93 is provided at the other end of the connecting rod 9, which is pivotally connected to the first spring seat 42 via a third pivot pin 94; the first spring seat 42 is slidably arranged in the housing 1 and can execute a linear back-and-forth movement along the guide structure of the housing 1. The adjusting assembly serves to adjust the spring force exerted by the spring mechanism 4 on the pivot arm element 3 and comprises an adjusting part 5, a drive spindle 6 and a movement part 7; the adjusting part 5 is rotatably arranged on the housing 1; in the present embodiment, the adjusting part 5 comprises a rotary shaft 51 and a helical gear part 52 mounted on the rotary shaft 51, the rotary shaft 51 being rotatably arranged on the housing 1; an actuating end 511 is provided at each end of the rotary shaft 51, and a clearance groove is formed on the side surface of the housing 1 at the position corresponding to the actuating end 511;Regardless of whether the present device is mounted on the left or right side of the cabinet body, the user can engage the clearance groove on the corresponding side with a Phillips screwdriver or similar tool and rotate the actuating end 511, thereby enabling the spring force adjustment from different directions and making operation more convenient and flexible; the drive spindle 6 has a helical gear section meshing with the helical gear section 52, the helical gear section 52 meshing at right angles with the helical gear section of the drive spindle 6, so that the direction of rotation of the adjusting part 5 is perpendicular to the axial direction of the drive spindle 6;This right-angled comb structure allows the adjusting part 5 to be adjusted from the side, which facilitates operation, while the helical toothing also has a self-locking function and does not loosen easily after adjustment. The moving part 7 engages the drive spindle 6 in threaded engagement, with one side of the moving part 7 bearing against the spring mechanism 4 and the other side being provided with a limiting spring 8; specifically, the moving part 7 is slidably inserted into the second spring seat 43, and the moving part 7 has a threaded bore 71 whose internal thread engages with the external thread of the drive spindle 6. When the drive spindle 6 is rotated, the moving part 7 moves in the axial direction of the drive spindle 6, thereby displacing the second spring seat 43 and changing the initial preload of the storage spring 41 to achieve the spring force adjustment. One end of the limiting spring 8 rests against the moving part 7, the other end rests against the housing 1. In the present embodiment, the limiting spring 8 is mounted on the drive spindle 6, resulting in a compact design and saving installation space. When the moving part 7 is moved towards the housing 1 by over-adjustment, the limiting spring 8 is compressed and provides elastic cushioning, effectively preventing the moving part 7 from impacting the housing 1 and thus preventing jamming. The spring force of the limiting spring 8 is designed to be significantly lower than that of the storage spring 41, so that it has no noticeable influence on the spring force adjustment in the normal adjustment range and only provides a buffer protection function at the limit position. Function of the present utility model: To adjust the spring force, the user engages the release groove on the corresponding side with a Phillips screwdriver or similar tool and rotates the actuating end 511. The rotating shaft 51 drives the helical gear part 52, which, by meshing with the helical gear section on the drive spindle 6, sets the drive spindle 6 in motion. As the drive spindle 6 rotates, the moving part 7, which engages with its thread, moves axially along the drive spindle 6 and displaces the second spring seat 43, thereby changing the initial preload of the storage spring 41.When the cabinet door is opened or closed, the pivot arm element 3 pivots about the first pivot point, drives the connecting rod 9 via the second pivot point, which displaces the first spring seat 42 along the guide structure in the housing 1 via the third pivot point, whereby the first spring seat 42 and the second spring seat 43 together compress or release the storage spring 41; after the change in the preload of the storage spring 41, the spring force acting on the first spring seat 42 changes, which is transmitted to the pivot arm element 3 via the connecting rod 9, thereby realizing the adjustment of the spring force acting on the pivot arm element 3. If the user adjusts the moving part 7 to the limit position during the adjustment process, the distance between the moving part 7 and the housing 1 decreases, the limiting spring 8 is compressed and provides elastic cushioning, thus preventing a rigid impact of the moving part 7 against the housing 1 and a resulting jamming, and ensuring that the adjustment assembly always remains smoothly adjustable. QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature CN 108915445B

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Claims

Furniture folding device with improved adjustment structure, comprising a housing (1) for connection to a cabinet body, a mounting element (2) for connection to a cabinet door, a pivot arm element (3) arranged on the housing (1), and a spring mechanism (4), wherein the pivot arm element (3) is pivotally connected to the housing (1) and the mounting element (2), the spring mechanism (4) serving to provide an elastic force to the pivot arm element (3), characterized in that it further comprises an adjustment assembly, the adjustment assembly serving to adjust the spring force exerted by the spring mechanism (4) on the pivot arm element (3);wherein the adjustment assembly comprises an adjustment part (5), a drive spindle (6) and a movement part (7), wherein the adjustment part (5) is rotatably arranged on the housing (1), the drive spindle (6) is in drive connection with the adjustment part (5), the movement part (7) is in thread engagement with the drive spindle (6), wherein one side of the movement part (7) rests against the spring mechanism (4) and the other side is provided with a limiting spring (8), wherein one end of the limiting spring (8) rests against the movement part (7) and the other end rests against the housing (1). Furniture folding device with improved adjustment structure according to claim 1, characterized in that the limiting spring (8) is mounted on the drive spindle (6). Furniture folding device with improved adjustment structure according to claim 1, characterized in that the adjustment part (5) comprises a rotary shaft (51) and a helical toothed part (52) mounted on the rotary shaft (51), wherein the rotary shaft (51) is rotatably arranged on the housing (1) and the drive spindle (6) has a helical toothed section meshing with the helical toothed part (52). Furniture folding device with improved adjustment structure according to claim 3, characterized in that an actuating end (511) is provided at each end of the rotary shaft (51) and a clearance groove is formed on the side surface of the housing (1) at the position corresponding to the actuating end (511). Furniture folding device with improved adjustment structure according to claim 3, characterized in that the helical toothed part (52) meshes at right angles with the helical toothed section of the drive spindle (6). Furniture folding device with improved adjustment structure according to claim 1, characterized in that the spring mechanism (4) comprises a storage spring (41), a first spring seat (42) and a second spring seat (43), wherein the storage spring (41) rests with its two ends against the first spring seat (42) and the second spring seat (43), the first spring seat (42) is in drive connection with the pivot arm element (3), so that when pivoting over the first spring seat (42) the pivot arm element (3) compresses or releases the storage spring (41), and the second spring seat (43) rests against the moving part (7). Furniture folding device with improved adjustment structure according to claim 6, characterized in that a positioning pin (431) is provided on the side of the second spring seat (43) facing the storage spring (41) and the storage spring (41) is mounted on the positioning pin (431). Furniture folding device with improved adjustment structure according to claim 6, characterized in that the pivot arm element (3) is pivotally connected to the housing (1) via a first pivot pin (31), the pivot arm element (3) is in drive connection to the first spring seat (42) via a connecting rod (9), wherein a first joint bore (91) is provided at one end of the connecting rod (9), which is pivotally connected to the pivot arm element (3) via a second pivot pin (92), and a second joint bore (93) is provided at the other end of the connecting rod (9), which is pivotally connected to the first spring seat (42) via a third pivot pin (94). Furniture folding device with improved adjustment structure according to claim 1, characterized in that the moving part (7) is slidably inserted into the second spring seat (43) and the moving part (7) has a threaded bore (71) whose internal thread interacts with the external thread of the drive spindle (6).

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