Folding sofa bed frame hinge

Abstract

The invention discloses a folding sofa bed frame hinge, and particularly relates to the technical field of sofa bed frame hinges, the folding sofa bed frame hinge comprises a mounting mechanism, a hinge mechanism is fixedly mounted in the mounting mechanism, a locking mechanism is fixedly mounted on one side of the hinge mechanism, and the mounting mechanism comprises a first fixing blade and a second fixing blade; a sliding groove is formed in the top of the first fixed blade, and the hinge mechanism comprises a first hinge joint, a second hinge joint and a third hinge joint. According to the folding sofa bed frame hinge, part of kinetic energy generated when a second fixed blade and a sliding groove rotate is consumed through friction force between a movable friction plate and a fixed friction plate, so that the damping effect is achieved, the friction force between the fixed friction plate and the movable friction plate is controlled in the mode that a spring extrudes a second hinge joint and a third hinge joint, and the damping effect is achieved. Through cooperation of the prismatic groove, the circular groove, the fixed shaft and the adjusting shaft, the compression degree of the spring is changed when a person rotates the adjusting shaft, and then the friction force between the fixed friction plate and the movable friction plate is changed.

Description

Technical Field

[0001] The present invention relates to the technical field of sofa bed frame hinges, and particularly to a folding sofa bed frame hinge. Background Art

[0002] A sofa bed frame hinge is a special mechanical connecting piece that ingeniously combines the functions of a sofa and a bed. In daily life, this kind of furniture looks like an ordinary sofa, but when needed, through the rotation and unfolding mechanism of the hinge, it can be easily converted into a comfortable bed. The hinge design usually includes strong metal parts that can support frequent opening and closing actions and ensure the stability and durability of the structure.

[0003] With the increasing demand for multifunctional furniture, the folding sofa bed, as a kind of furniture that can save space and meet the rest needs, has received extensive attention. However, traditional folding sofa bed hinges do not have appropriate damping during the conversion process, resulting in too fast speeds when the sofa bed is unfolded or retracted, which is likely to cause impacts and noises, and may even cause harm to users. Summary of the Invention

[0004] The purpose of the present invention is to provide a folding sofa bed frame hinge to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A folding sofa bed frame hinge includes an installation mechanism. Inside the installation mechanism, a hinge mechanism is fixedly installed. On one side of the hinge mechanism, a locking mechanism is fixedly installed. The installation mechanism includes a first fixed leaf and a second fixed leaf. A chute is opened at the top of the first fixed leaf. The hinge mechanism includes a first hinge section, a second hinge section, and a third hinge section. The first hinge section is fixedly installed at the top of the chute. The second hinge section and the third hinge section are slidably installed on the top of the first fixed leaf through the chute. A rhombic groove is opened inside the second hinge section. A circular groove is opened inside the third hinge section. A fixed shaft is slidably installed inside the rhombic groove. An adjusting shaft is movably installed inside the circular groove. The adjusting shaft is threadedly connected to the inside of the fixed shaft. Both the fixed shaft and the adjusting shaft are rotatably installed inside the first hinge section. A number of fixed friction plates are sleeved on the outer walls of the adjusting shaft and the fixed shaft. The fixed friction plates are slidably installed on the top of the first fixed leaf through the chute. A number of moving friction plates are sleeved on the outer walls of the adjusting shaft and the fixed shaft. The number of moving friction plates and fixed friction plates are arranged in an alternating and symmetric manner on the left and right sides of the first hinge section. Springs are sleeved on the outer walls of the adjusting shaft and the fixed shaft. The two groups of springs are respectively arranged inside the circular groove and the rhombic groove.

[0006] Preferably, filling holes are opened at the tops of the first hinge section, the second hinge section, and the third hinge section.

[0007] Preferably, a plurality of mounting holes are provided inside the first fixing leaf and the second fixing leaf.

[0008] Preferably, a plurality of limiting grooves are formed on a side of the first fixed leaf close to the hinge mechanism, and a plurality of limiting teeth are fixedly mounted on a side of the second fixed leaf close to the hinge mechanism.

[0009] Preferably, the locking mechanism includes a sliding pin and two sets of mounting sleeves, the two sets of mounting sleeves are fixedly mounted on one side of the second hinge joint and the third hinge joint respectively, the sliding pin is slidably mounted inside the mounting sleeve, an eccentric wheel is rotatably mounted on one end of the sliding pin close to the third hinge joint, and a dial ring is fixedly mounted on one side of the eccentric wheel.

[0010] Preferably, the side with the largest and the side with the smallest eccentricity of the eccentric wheel are both provided with a self-locking groove.

[0011] Preferably, operation grooves are provided on both the front and rear sides of the dial ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the folding sofa bed frame hinge;

[0013] 1. The second hinge joint, the third hinge joint and the fixed friction plate can slide on the top of the first fixed leaf through the provided slide groove. The friction between the dynamic friction plate and the fixed friction plate consumes part of the kinetic energy when the second fixed leaf and the slide groove rotate, thereby achieving a damping effect. The friction between the fixed friction plate and the dynamic friction plate is controlled by squeezing the second hinge joint and the third hinge joint through the spring. The cooperation between the prismatic groove, the circular groove, the fixed shaft and the adjusting shaft enables the personnel to change the compression degree of the spring when rotating the adjusting shaft, thereby changing the friction between the fixed friction plate and the dynamic friction plate. In summary, the device can provide a certain damping effect for the sofa bed, and the damping force is adjustable.

[0014] 2. Through the cooperation between the provided installation sleeve, the sliding pin and the eccentric wheel, the personnel can rotate the dial ring to shorten the distance between the second hinge section and the third hinge section, thereby changing the friction force between the fixed friction plate and the movable friction plate. In summary, the device only needs to rotate the eccentric wheel 180° through the dial ring to adjust the friction force between the fixed friction plate and the movable friction plate to the maximum, quickly increase the damping force and lock the hinge, thereby providing an angle locking function for the sofa bed to prevent accidental folding or unfolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the installation mechanism of the present invention;

[0017] Figure 3This is a schematic structural diagram of the hinge mechanism of the present invention;

[0018] Figure 4 This is a schematic structural diagram of the locking mechanism of the present invention.

[0019] In the figure: 1. Installation mechanism; 101. First fixed leaf; 102. Second fixed leaf; 103. Slide groove; 104. Installation hole; 105. Limit groove; 106. Limit tooth; 2. Hinge mechanism; 201. First hinge joint; 202. Second hinge joint; 203. Third hinge joint; 204. Rhombic groove; 205. Circular groove; 206. Fixed shaft; 207. Adjusting shaft; 208. Spring; 209. Fixed friction plate; 210. Movable friction plate; 211. Filling hole; 3. Locking mechanism; 301. Installation sleeve; 302. Slide pin; 303. Eccentric wheel; 304. Dial ring; 305. Operation groove; 306. Self-locking groove. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-3, the present invention provides a technical solution: a folding sofa bed frame hinge, including an installation mechanism 1. Inside the installation mechanism 1, a hinge mechanism 2 is fixedly installed. On one side of the hinge mechanism 2, a locking mechanism 3 is fixedly installed. The installation mechanism 1 includes a first fixed leaf 101 and a second fixed leaf 102. At the top of the first fixed leaf 101, a sliding groove 103 is opened. The hinge mechanism 2 includes a first hinge section 201, a second hinge section 202, and a third hinge section 203. The first hinge section 201 is fixedly installed at the top of the sliding groove 103. The second hinge section 202 and the third hinge section 203 are slidably installed at the top of the first fixed leaf 101 through the sliding groove 103. Inside the second hinge section 202, a rhombic groove 204 is opened. Inside the third hinge section 203, a circular groove 205 is opened. Inside the rhombic groove 204, a fixed shaft 206 is slidably installed. Inside the circular groove 205, an adjustment shaft 207 is movably installed. The adjustment shaft 207 is threadedly connected inside the fixed shaft 206. Both the fixed shaft 206 and the adjustment shaft 207 are rotatably installed inside the first hinge section 201. On the outer walls of both the adjustment shaft 207 and the fixed shaft 206, a number of fixed friction plates 209 are sleeved and installed. The fixed friction plates 209 are slidably installed at the top of the first fixed leaf 101 through the sliding groove 103. On the outer walls of both the adjustment shaft 207 and the fixed shaft 206, a number of moving friction plates 210 are sleeved and installed. A number of the moving friction plates 210 and the fixed friction plates 209 are arranged symmetrically and alternately on the left and right sides of the first hinge section 201. On the outer walls of both the adjustment shaft 207 and the fixed shaft 206, springs 208 are sleeved and installed. The two groups of springs 208 are respectively arranged inside the circular groove 205 and the rhombic groove 204. At the top of each of the first hinge section 201, the second hinge section 202, and the third hinge section 203, a filling hole 211 is opened. Through the filling hole 211, it is convenient for the user to fill lubricating oil into the first hinge section 201, the second hinge section 202, and the third hinge section 203 to ensure the smooth rotation of the device. Inside both the first fixed leaf 101 and the second fixed leaf 102, a number of installation holes 104 are opened. Through the installation holes 104 and screws, the device is installed on the corresponding structure of the sofa bed. On one side of the first fixed leaf 101 close to the hinge mechanism 2, a number of limiting grooves 105 are opened. On one side of the second fixed leaf 102 close to the hinge mechanism 2, a number of limiting teeth 106 are fixedly installed. When the installation mechanism 1 is at the maximum opening angle, the limiting grooves 105 and the limiting teeth 106 will engage with each other to ensure the structural strength of the device when the sofa bed is in the unfolded state.

[0022] The implementation method is specifically as follows: The second hinge section 202, the third hinge section 203, and the fixed friction plate 209 can slide on the top of the first fixed blade 101 through the chute 103. Through the frictional force between the moving friction plate 210 and the fixed friction plate 209, part of the kinetic energy during the rotation of the second fixed blade 102 and the chute 103 is consumed, thereby achieving a damping effect. By means of the spring 208 pressing the second hinge section 202 and the third hinge section 203, the frictional force between the fixed friction plate 209 and the moving friction plate 210 is controlled. Through the cooperation between the rhombus groove 204, the circular groove 205, the fixed shaft 206, and the adjusting shaft 207, when a person rotates the adjusting shaft 207, the compression degree of the spring 208 can be changed, and further the frictional force between the fixed friction plate 209 and the moving friction plate 210 can be changed. In summary, this device can provide a certain damping effect for the sofa bed, and the damping force is adjustable.

[0023] Please refer to Figures 1-4 , the present invention provides a technical solution: a folding sofa bed frame hinge, the locking mechanism 3 includes a sliding pin 302 and two sets of mounting sleeves 301. The two sets of mounting sleeves 301 are respectively fixedly installed on one side of the second hinge section 202 and the third hinge section 203. The sliding pin 302 is slidably installed inside the mounting sleeve 301. An eccentric wheel 303 is rotatably installed at one end of the sliding pin 302 close to the third hinge section 203. A retaining ring 304 is fixedly installed on one side of the eccentric wheel 303. Self-locking grooves 306 are provided on both the side with the maximum and minimum eccentric distances of the eccentric wheel 303. Through the self-locking grooves 306, the eccentric wheel 303 can be locked on one side of the mounting sleeve 301 at the maximum stroke and the minimum stroke. Operation grooves 305 are provided on both the front and back sides of the retaining ring 304. Through the operation grooves 305, the retaining ring 304 is prevented from completely fitting on one side of the third hinge section 203, so as to leave a certain gap for fingers to insert, facilitating the operation of personnel.

[0024] The implementation method is specifically as follows: Through the cooperation between the mounting sleeve 301, the sliding pin 302, and the eccentric wheel 303, when a person rotates the retaining ring 304, the distance between the second hinge section 202 and the third hinge section 203 can be shortened, and the frictional force between the fixed friction plate 209 and the moving friction plate 210 can be changed. In summary, this device only needs to rotate the eccentric wheel 303 by 180° through the retaining ring 304 to adjust the frictional force between the fixed friction plate 209 and the moving friction plate 210 to the maximum, quickly increase the damping force and lock the hinge, providing an angle locking function for the sofa bed to prevent accidental folding or unfolding.

[0025] Working principle: When using this folding sofa bed frame hinge, the second hinge section 202, the third hinge section 203, and the fixed friction plate 209 can slide on the top of the first fixed leaf 101 through the chute 103. Through the frictional force between the moving friction plate 210 and the fixed friction plate 209, part of the kinetic energy during the rotation of the second fixed leaf 102 and the chute 103 is consumed, thus achieving a damping effect. By means of the spring 208 pressing the second hinge section 202 and the third hinge section 203, the frictional force between the fixed friction plate 209 and the moving friction plate 210 is controlled. Through the cooperation between the rhombus groove 204, the circular groove 205, the fixed shaft 206, and the adjusting shaft 207, when a person rotates the adjusting shaft 207, the compression degree of the spring 208 can be changed, and further the frictional force between the fixed friction plate 209 and the moving friction plate 210 can be changed. In summary, this device can provide a certain damping effect for the sofa bed, and the damping force is adjustable;

[0026] It is convenient for the user to inject lubricating oil into the interior of the first hinge section 201, the second hinge section 202, and the third hinge section 203 through the filling hole 211 to ensure the smooth rotation of this device. This device is installed on the corresponding structure of the sofa bed through the installation hole 104 and screws. When the installation mechanism 1 is at the maximum opening angle, the limit groove 105 and the limit tooth 106 will mesh with each other to ensure the structural strength of this device when the sofa bed is in the unfolded state;

[0027] Through the cooperation between the installation sleeve 301, the sliding pin 302, and the eccentric wheel 303, when a person rotates the dial ring 304, the distance between the second hinge section 202 and the third hinge section 203 can be shortened, and the frictional force between the fixed friction plate 209 and the moving friction plate 210 can be changed. In summary, for this device, only by rotating the eccentric wheel 303 by 180° through the dial ring 304, the frictional force between the fixed friction plate 209 and the moving friction plate 210 can be adjusted to the maximum, quickly increasing the damping force and locking the hinge, providing an angle locking function for the sofa bed to prevent accidental folding or unfolding;

[0028] Through the self-locking groove 306, the eccentric wheel 303 can be locked on one side of the installation sleeve 301 at the maximum stroke and the minimum stroke. Through the operation groove 305, the dial ring 304 is prevented from completely fitting on one side of the third hinge section 203, thus leaving a certain gap for the fingers to insert, which is convenient for the person to operate.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A folding sofa bed frame hinge, comprising a mounting mechanism (1), a hinge mechanism (2) being fixedly mounted inside the mounting mechanism (1), a locking mechanism (3) being fixedly mounted on one side of the hinge mechanism (2), the mounting mechanism (1) comprising a first fixed leaf (101) and a second fixed leaf (102), a sliding groove (103) being provided on the top of the first fixed leaf (101), characterized in that: The hinge mechanism (2) comprises a first hinge joint (201), a second hinge joint (202), and a third hinge joint (203); the first hinge joint (201) is fixedly mounted on the top of the slide groove (103); the second hinge joint (202) and the third hinge joint (203) are slidably mounted on the top of the first fixed leaf (101) through the slide groove (103); a prismatic groove (204) is provided inside the second hinge joint (202); a circular groove (205) is provided inside the third hinge joint (203); a fixed shaft (206) is slidably mounted inside the prismatic groove (204); an adjusting shaft (207) is movably mounted inside the circular groove (205); the adjusting shaft (207) is threadedly connected inside the fixed shaft (206); and the fixed shaft (206) and the adjusting shaft (207) are both rotatably mounted inside the first hinge joint (201); The outer walls of the adjusting shaft (207) and the fixed shaft (206) are sleeved with a plurality of fixed friction plates (209), and the fixed friction plates (209) are slidably mounted on the top of the first fixed leaf (101) through the sliding groove (103). The outer walls of the adjusting shaft (207) and the fixed shaft (206) are sleeved with a plurality of dynamic friction plates (210), and the plurality of dynamic friction plates (210) and the fixed friction plates (209) are staggered and symmetrically arranged on the left and right sides of the first hinge joint (201). The outer walls of the adjusting shaft (207) and the fixed shaft (206) are sleeved with springs (208), and two groups of the springs (208) are respectively arranged inside the circular groove (205) and the prismatic groove (204).

2. A folding sofa bed frame hinge according to claim 1, characterized in that: A filling hole (211) is provided on the top of each of the first hinge joint (201), the second hinge joint (202) and the third hinge joint (203).

3. The folding sofa bed frame hinge according to claim 1, characterized in that: A plurality of mounting holes (104) are provided inside the first fixing leaf (101) and the second fixing leaf (102).

4. The folding sofa bed frame hinge according to claim 1, characterized in that: A plurality of limiting grooves (105) are provided on a side of the first fixing leaf (101) close to the hinge mechanism (2), and a plurality of limiting teeth (106) are fixedly mounted on a side of the second fixing leaf (102) close to the hinge mechanism (2).

5. The folding sofa bed frame hinge according to claim 1, characterized in that: The locking mechanism (3) comprises a sliding pin (302) and two sets of mounting sleeves (301), wherein the two sets of mounting sleeves (301) are fixedly mounted on one side of the second hinge joint (202) and the third hinge joint (203), respectively; the sliding pin (302) is slidably mounted inside the mounting sleeves (301); an eccentric wheel (303) is rotatably mounted on one end of the sliding pin (302) close to the third hinge joint (203); and a dial ring (304) is fixedly mounted on one side of the eccentric wheel (303).

6. A folding sofa bed frame hinge according to claim 5, characterized in that: The eccentric wheel (303) is provided with a self-locking groove (306) on both the side with the largest eccentricity and the side with the smallest eccentricity.

7. The folding sofa bed frame hinge according to claim 5, characterized in that: The front and rear sides of the dial ring (304) are both provided with operating grooves (305).

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