Hinge folding device

Abstract

The invention belongs to the technical field of hinges, and discloses a hinge folding device which comprises an adjusting mechanism, the adjusting mechanism comprises a knob, the knob is fixedly connected with an adjusting fluted disc, the bottom of the adjusting fluted disc is fixedly connected with a limiting plate, the bottom of the limiting plate is fixedly connected with a gear, and the side face of the gear is meshed with a rack; through cooperation of structures such as a knob and an adjusting fluted disc, the foldable angle of the device can be adjusted and limited conveniently, the knob is rotated before folding, the adjusting fluted disc rotates along the inclined face of teeth of a limiting fluted disc, a gear is driven to rotate, and a rack meshed with the gear is driven to move in the direction close to a limiting block; when the device is folded, the damper and the anti-collision pad are driven to move into the limiting groove, the movable distance of the limiting block in the limiting groove is shortened, and therefore the folding angle of the device is indirectly adjusted and limited, the folding angle of the device can be adjusted according to actual needs, and the adaptability of the device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hinges, and in particular relates to a hinge folding device. Background Art

[0002] As an indispensable component of mechanical engineering, the design and application of hinged folding devices span a wide range of fields from daily life to industrial manufacturing. The core of this device lies in its hinge structure, which allows flexible relative movement between two or more parts to achieve functions such as folding, unfolding or rotation. The design of hinged folding devices pursues compactness of structure, convenience of use and stability of operation to adapt to different usage scenarios and needs. For example, folding tables, folding chairs and retractable dining tables in daily life allow furniture to be folded and stored when not in use to save space; in the field of electronic equipment, such as folding screen mobile phones and tablets, the hinge structure allows the screen to switch between folding and unfolding, taking into account portability and large-screen experience; in the field of aerospace, hinged folding devices are used for the retractable design of aircraft wings to adapt to the different needs of take-off, flight and landing; and in industrial manufacturing, hinged folding devices play a key role in automated production lines, logistics equipment (such as folding shelves in automated warehousing systems) and construction machinery (such as folding cranes and telescopic arms).

[0003] Most of the existing hinge folding devices have a fixed folding angle, which cannot be adjusted according to actual usage scenarios or personal needs, limiting the diversified application of their functions. At the same time, during the folding process, the rapid contact and collision of the hinge parts produce obvious impact and noise, which not only affects the user experience, but also may accelerate the wear of the device and shorten its service life. Therefore, a hinge folding device is proposed which has the effects of adjustable folding angle, reducing impact and noise, and improving device stability. Summary of the invention

[0004] In order to solve the problem mentioned in the above background technology that the folding angles of most devices are fixed and cannot be adjusted according to actual usage scenarios or personal needs, which limits the diversified application of their functions, and at the same time, during the folding process, the rapid contact and collision of the hinge parts produce obvious impact and noise, which not only affects the user experience, but also may accelerate the wear of the device and shorten its service life, the present invention provides a hinge folding device.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a hinge folding device, comprising an adjustment mechanism, the adjustment mechanism is arranged in a shell mechanism, a hinge mechanism is arranged inside the shell mechanism, and the shell mechanism is arranged inside a fixing mechanism;

[0006] The adjusting mechanism includes a knob, an adjusting toothed disc is fixedly connected on the top of the knob, a limiting plate is fixedly connected on the bottom of the adjusting toothed disc, a gear is fixedly connected on the bottom of the limiting plate, a rack is meshed on the side of the gear, a damper is fixedly connected on the rack, an anti-collision pad is slidably connected to the end of the damper away from the rack, a limiting toothed disc is slidably connected between the knob and the adjusting toothed disc, a support plate is slidably connected between the limiting plate and the gear, and a third spring is fixedly connected to the bottom of the support plate.

[0007] Preferably, there are four knobs, and the limiting toothed disc and the adjusting toothed disc are both provided with a plurality of right-angled triangular teeth, the bottom of the limiting toothed disc is clamped with the top of the adjusting toothed disc, and the anti-collision pad has a trapezoidal shape.

[0008] Preferably, the shell mechanism comprises two hinge shells, the sides of the hinge shells are fixedly connected with fixing flanges, the interior of the hinge shells is provided with a slide groove, the inner wall of the slide groove is provided with a limiting groove, and the sides of the inner wall of the slide groove are evenly provided with a plurality of slots.

[0009] Preferably, the shape of the limiting groove is trapezoidal, the gear is rotationally connected to the inner wall of the hinge shell, the rack is slidingly connected to the inner wall of the hinge shell, the anti-collision pad passes through the inner wall of the hinge shell and extends to the inside of the limiting groove, the size of the anti-collision pad is adapted to the size of the limiting groove, and the anti-collision pad is slidingly connected to the limiting groove.

[0010] Preferably, the top of the knob passes through the inner wall of the hinge shell and extends to the top of the hinge shell, the top of the limiting gear plate is fixedly connected to the inner wall of the hinge shell, the bottom of the support plate is elastically connected to the inner wall of the hinge shell through a third spring, and the support plate is slidingly connected to the inner wall of the hinge shell.

[0011] Preferably, the hinge mechanism includes a hinge shaft, the upper rotation of the hinge shaft is connected to a hinge arm, the hinge shaft is fixedly connected to a slider, the top of the slider is fixedly connected to a limiting block, the side of the limiting block away from the slider is fixedly connected to a first spring, the slider is slidably connected to a clamping block, and the clamping block is fixedly connected to a second spring.

[0012] Preferably, the clamping block is elastically connected to the inner wall of the slider via a second spring, and the clamping block penetrates the inner wall of the slider and extends to the side of the slider.

[0013] Preferably, the size of the card block is adapted to the size of the card slot, the card block is carded with the card slot, the slider is slidably connected to the slide slot, the limit block is slidably connected to the limit slot, the hinge shaft is rotatably connected to the inner wall of the hinge shell, the limit block is elastically connected to the inner wall of the hinge shell through a first spring, and the anti-collision pad is located on the side of the limit block away from the first spring.

[0014] Preferably, the fixing mechanism comprises two fixing seats, and grooves are formed at upper and lower ends of the fixing seats.

[0015] Preferably, the two hinge housings are respectively installed inside two fixing seats through fixing flanges, and the knob is located inside the groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention facilitates the adjustment and limitation of the foldable angle of the device by arranging the cooperation of structures such as a knob and an adjusting toothed disc. Before folding, the knob is turned to make the adjusting toothed disc rotate along the inclined surface of the teeth of the limiting toothed disc, driving the gear to rotate and driving the rack meshing therewith to move in the direction close to the limiting block, driving the damper and the anti-collision pad to move to the inside of the limiting groove, reducing the movable distance of the limiting block in the limiting groove, thereby indirectly adjusting and limiting the foldable angle of the device, so that the device can adjust the folding angle according to actual needs, thereby enabling the device to adapt to more diverse usage scenarios and needs, and improving the adaptability of the device.

[0018] The present invention facilitates buffering of the device by arranging the cooperation of structures such as the first spring and the damper. During the folding process, the slider slides in the direction away from the first spring inside the slide groove, so that the first spring in the extruded state is stretched under the drive of the limit block. When the limit block slides half the distance inside the limit groove, the first spring returns to a natural state. During this process, the limit block obtains a certain speed under the elastic force of the first spring. At this time, the fixed seat rotates 90 degrees, and the limit block continues to slide to stretch the first spring, and the movement of the limit block is buffered by the elastic force. When the side of the limit block away from the first spring abuts against the anti-collision pad, that is, when the fixed seat is about to be folded 180 degrees, the anti-collision pad will absorb a certain impact, and the damper will further buffer and reduce vibration of the limit block, thereby reducing the impact and noise during the folding process, improving the user experience, and extending the service life of the device.

[0019] The present invention improves the stability of the structure when folding by arranging the cooperation of structures such as the card block and the card slot. During the sliding of the limit block, the slider drives the card block to move, and the movement of the card block causes the inner wall of the card slot to squeeze the inclined surface of the card block. By squeezing the inclined surface, the card block is moved to the inside of the slider and released from the card slot, and the second spring is squeezed at the same time. When the slider drives the card block to move to the next card slot, the card block will be engaged with the card slot at that location under the action of the elastic force of the second spring, which can play a certain deceleration effect in the first half of the movement of the slider, and can play a certain deceleration and limiting effect in the second half of the movement of the slider, thereby improving the stability of the device when folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structural relationship between the damper and the limiting groove of the present invention;

[0022] Figure 3 This is a schematic diagram of the structural relationship between the clamping block and the sliding block of the present invention;

[0023] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 It is a cross-sectional schematic diagram of the housing mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the structural relationship between the card block and the card slot of the present invention;

[0026] Figure 7 It is a schematic diagram of the structural relationship between the limit block and the limit groove of the present invention;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the hinge mechanism of the present invention;

[0028] Fig. 9 It is a schematic diagram of the internal structure of the shell mechanism of the present invention.

[0029] In the figure: 1. hinge mechanism; 101. hinge shaft; 102. hinge arm; 103. slider; 104. limit block; 105. first spring; 106. second spring; 107. clamping block; 2. shell mechanism; 201. hinge shell; 202. fixing flange; 203. slide groove; 204. limit groove; 205. clamping groove; 3. adjustment mechanism; 301. knob; 302. adjustment toothed disc; 303. gear; 304. rack; 305. damper; 306. anti-collision pad; 307. support plate; 308. third spring; 309. limit toothed disc; 310. limit plate; 4. fixing mechanism; 401. fixing seat; 402. groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 9 As shown, the present invention provides a hinge folding device, comprising an adjustment mechanism 3, the adjustment mechanism 3 is arranged in a shell mechanism 2, a hinge mechanism 1 is arranged inside the shell mechanism 2, and the shell mechanism 2 is arranged inside a fixing mechanism 4;

[0032] The adjustment mechanism 3 includes a knob 301, an adjusting toothed disc 302 is fixedly connected to the top of the knob 301, a limiting plate 310 is fixedly connected to the bottom of the limiting plate 310, a gear 303 is fixedly connected to the bottom of the limiting plate 310, a rack 304 is meshed on the side of the gear 303, a damper 305 is fixedly connected to the rack 304, an end of the damper 305 away from the rack 304 is slidably connected to an anti-collision pad 306, a limiting toothed disc 309 is slidably connected between the knob 301 and the adjusting toothed disc 302, a support plate 307 is slidably connected between the limiting plate 310 and the gear 303, and a third spring 308 is fixedly connected to the bottom of the support plate 307.

[0033] There are four knobs 301 , and a plurality of right-angled triangular teeth are provided on the limit toothed disc 309 and the adjusting toothed disc 302 . The bottom of the limit toothed disc 309 is clamped with the top of the adjusting toothed disc 302 , and the anti-collision pad 306 has a trapezoidal shape.

[0034] The above scheme is adopted: by setting the cooperation of the knob 301 and the adjusting toothed disc 302 and other structures, it is convenient to adjust and limit the foldable angle of the device. Before folding, the knob 301 is turned to make the adjusting toothed disc 302 rotate along the inclined surface of the teeth of the limiting toothed disc 309, driving the gear 303 to rotate and drive the rack 304 meshing therewith to move in the direction close to the limiting block 104, driving the damper 305 and the anti-collision pad 306 to move to the inside of the limiting groove 204, reducing the movable distance of the limiting block 104 in the limiting groove 204, thereby indirectly adjusting and limiting the foldable angle of the device, so that the device can adjust the folding angle according to actual needs, improve the adaptability of the device, so that the device can adapt to more diverse usage scenarios and needs, and at the same time, when the knob 3 When the anti-collision pad 306 is subjected to force, the knob 301 will not rotate in the opposite direction, that is, the damper 305 will not move away from the limit block 104 when subjected to force. When the position of the damper 305 needs to be reset, it is only necessary to press the knob 301 downward to release the engagement between the adjusting toothed disk 302 and the limit toothed disk 309 and squeeze the third spring 308. Then, the knob 301 is rotated in the opposite direction to reset the damper 305 through transmission. Finally, the knob 301 is released, and the adjusting toothed disk 302 will move upward under the action of the elastic force of the third spring 308 and engage with the limit toothed disk 309, which is convenient for operation and can also improve the folding stability after adjustment.

[0035] like Figure 2 , Figure 5 , Figure 6 and Fig. 9 As shown, the housing mechanism 2 includes two hinge housings 201, the sides of the hinge housings 201 are fixedly connected with fixed flanges 202, the interior of the hinge housings 201 is provided with a slide groove 203, the inner wall of the slide groove 203 is provided with a limiting groove 204, and the side of the inner wall of the slide groove 203 is evenly provided with a plurality of card grooves 205.

[0036] The top of the knob 301 passes through the inner wall of the hinge housing 201 and extends to the top of the hinge housing 201. The top of the limiting gear plate 309 is fixedly connected to the inner wall of the hinge housing 201. The bottom of the support plate 307 is elastically connected to the inner wall of the hinge housing 201 through the third spring 308. The support plate 307 is slidably connected to the inner wall of the hinge housing 201.

[0037] The above scheme is adopted: by setting the cooperation of the first spring 105 and the damper 305 and other structures, it is convenient to buffer the device. During the folding process, the slider 103 slides in the direction away from the first spring 105 inside the slide groove 203, so that the first spring 105 in the extruded state will be stretched under the drive of the limit block 104. When the limit block 104 slides half the distance inside the limit groove 204, the first spring 105 is reset to the natural state. In this process, the limit block 104 is in the elastic force of the first spring 105. When the fixed seat 401 is used to obtain a certain speed, the fixed seat 401 rotates 90 degrees, and the limit block 104 continues to slide to stretch the first spring 105, and the movement of the limit block 104 is buffered by the elastic force. When the side of the limit block 104 away from the first spring 105 is against the anti-collision pad 306, that is, when the fixed seat 401 is about to be folded 180 degrees, the anti-collision pad 306 will absorb a certain impact, and the damper 305 will further buffer the limit block 104, thereby reducing the impact and noise during the folding process and improving the user experience.

[0038] like Figures 5 to 9 As shown, the shape of the limiting groove 204 is trapezoidal, the gear 303 is rotationally connected to the inner wall of the hinge housing 201, the rack 304 is slidingly connected to the inner wall of the hinge housing 201, the anti-collision pad 306 penetrates the inner wall of the hinge housing 201 and extends to the inside of the limiting groove 204, the size of the anti-collision pad 306 is adapted to the size of the limiting groove 204, and the anti-collision pad 306 is slidingly connected to the limiting groove 204.

[0039] The hinge mechanism 1 includes a hinge shaft 101, the upper rotation of the hinge shaft 101 is connected to a hinge arm 102, a slider 103 is fixedly connected to the hinge shaft 101, a limit block 104 is fixedly connected to the top of the slider 103, a first spring 105 is fixedly connected to the side of the limit block 104 away from the slider 103, a clamping block 107 is slidably connected to the slider 103, a second spring 106 is fixedly connected to the clamping block 107, the clamping block 107 is elastically connected to the inner wall of the slider 103 through the second spring 106, the clamping block 107 penetrates the inner wall of the slider 103 and extends to the side of the slider 103, and inclined surfaces are provided on both sides of the clamping block 107.

[0040] The size of the block 107 is adapted to the size of the slot 205, the block 107 is engaged with the slot 205, the slider 103 is slidably connected to the slot 203, the limit block 104 is slidably connected to the limit slot 204, the hinge shaft 101 is rotatably connected to the inner wall of the hinge shell 201, the limit block 104 is elastically connected to the inner wall of the hinge shell 201 through the first spring 105, and the anti-collision pad 306 is located on the side of the limit block 104 away from the first spring 105.

[0041] The fixing mechanism 4 includes two fixing seats 401 . Grooves 402 are provided at both upper and lower ends of the fixing seats 401 . The two hinge housings 201 are respectively installed inside the two fixing seats 401 through fixing flanges 202 . The knob 301 is located inside the groove 402 .

[0042] The above scheme is adopted: by setting the coordination of structures such as the card block 107 and the card slot 205, the stability of the structure when folding is improved. During the sliding of the limit block 104, the slider 103 will drive the card block 107 to move, and the movement of the card block 107 will cause the inner wall of the card slot 205 to squeeze the inclined surface of the card block 107, and the card block 107 is moved to the inside of the slider 103 by squeezing the inclined surface and released from the card slot 205, while squeezing the second spring 106. When the slider 103 drives the card block 107 to move to the next card slot 205, the card block 107 will be engaged with the card slot 205 at that location under the action of the elastic force of the second spring 106, which can play a certain deceleration effect in the first half of the movement of the slider 103, and can play a certain deceleration and limiting effect in the second half of the movement of the slider 103, thereby improving the stability of the device when folded.

[0043] The working principle and use process of the present invention are as follows: first, the fixing flange 202 is fixed to the inside of the fixing seat 401 by bolts, and then when the fixing seat 401 is folded, the hinge arm 102 is rotated on the hinge shaft 101, and at the same time, the hinge shaft 101 fixed with the slider 103 is driven to slide inside the hinge housing 201, driving the slider 103 to slide inside the slide groove 203 in a direction away from the first spring 105, so that the first spring 105 in the extruded state is stretched under the drive of the limit block 104, and when the limit block 104 slides a certain distance inside the limit groove 204, the first spring 105 in the extruded state is stretched. When the distance is halfway, the first spring 105 returns to the natural state. During this process, the limit block 104 will obtain a certain speed under the elastic force of the first spring 105. At this time, the fixed seat 401 rotates 90 degrees, and the limit block 104 continues to slide to stretch the first spring 105, and the movement of the limit block 104 is buffered by the elastic force. When the side of the limit block 104 away from the first spring 105 abuts against the anti-collision pad 306, that is, when the fixed seat 401 is about to be folded 180 degrees, the damper 305 will further buffer the limit block 104 to reduce the impact and noise during the folding process;

[0044] At the same time, the knob 301 can be turned before folding to make the adjusting toothed disc 302 rotate along the inclined surface of the teeth of the limiting toothed disc 309, driving the gear 303 to rotate and drive the rack 304 meshing therewith to move in the direction close to the limiting block 104, driving the damper 305 and the anti-collision pad 306 to move into the inside of the limiting groove 204, reducing the movable distance of the limiting block 104 in the limiting groove 204, thereby indirectly adjusting and limiting the foldable angle of the device. At the same time, when the knob 301 is not turned, the adjusting toothed disc 302 will engage with the right-angled edge of the teeth on the limiting toothed disc 309 to form a self-locking When the anti-collision pad 306 is subjected to force, the knob 301 will not be caused to rotate in the opposite direction, that is, the damper 305 will not move in the direction away from the limit block 104 when subjected to force. When the position of the damper 305 needs to be reset, it is only necessary to press the knob 301 downward to release the engagement between the adjusting toothed disc 302 and the limit toothed disc 309 and squeeze the third spring 308. Then, the knob 301 is rotated in the opposite direction to drive the damper 305 to reset through transmission. Finally, the knob 301 is released, and the adjusting toothed disc 302 will move upward under the action of the elastic force of the third spring 308 and engage with the limit toothed disc 309.

[0045] During the sliding of the limit block 104, the slider 103 will drive the block 107 to move, and the movement of the block 107 will cause the inner wall of the slot 205 to squeeze the inclined surface of the block 107, and the block 107 will move to the inside of the slider 103 and release the engagement with the slot 205 by squeezing the inclined surface, while squeezing the second spring 106. When the slider 103 drives the block 107 to move to the next slot 205, the block 107 will engage with the slot 205 at that location under the action of the elastic force of the second spring 106, which can play a certain deceleration role in the first half of the movement of the slider 103, and can play a certain deceleration and limiting role in the second half of the movement of the slider 103.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hinge folding device, comprising an adjustment mechanism (3), characterized in that: The adjustment mechanism (3) is arranged on the housing mechanism (2), a hinge mechanism (1) is arranged inside the housing mechanism (2), and the housing mechanism (2) is arranged inside the fixing mechanism (4); The adjusting mechanism (3) comprises a knob (301), an adjusting toothed disc (302) is fixedly connected to the top of the knob (301), a limiting plate (310) is fixedly connected to the bottom of the adjusting toothed disc (302), a gear (303) is fixedly connected to the bottom of the limiting plate (310), a rack (304) is meshed on the side of the gear (303), a damper (305) is fixedly connected to the rack (304), an end of the damper (305) away from the rack (304) is slidably connected to an anti-collision pad (306), a limiting toothed disc (309) is slidably connected between the knob (301) and the adjusting toothed disc (302), a support plate (307) is slidably connected between the limiting plate (310) and the gear (303), and a third spring (308) is fixedly connected to the bottom of the support plate (307).

2. The hinge folding device according to claim 1, characterized in that: There are four knobs (301), and the limiting toothed disc (309) and the adjusting toothed disc (302) are both provided with a plurality of right-angled triangular teeth. The bottom of the limiting toothed disc (309) is clamped with the top of the adjusting toothed disc (302), and the anti-collision pad (306) has a trapezoidal shape.

3. The hinge folding device according to claim 1, characterized in that: The housing mechanism (2) comprises two hinge housings (201), the side of the hinge housing (201) is fixedly connected with a fixing flange (202), the interior of the hinge housing (201) is provided with a slide groove (203), the inner wall of the slide groove (203) is provided with a limiting groove (204), and the side of the inner wall of the slide groove (203) is evenly provided with a plurality of clamping grooves (205).

4. The hinge folding device according to claim 3, characterized in that: The limiting groove (204) has a trapezoidal shape, the gear (303) is rotatably connected to the inner wall of the hinge housing (201), the rack (304) is slidably connected to the inner wall of the hinge housing (201), the anti-collision pad (306) penetrates the inner wall of the hinge housing (201) and extends to the inside of the limiting groove (204), the size of the anti-collision pad (306) is compatible with the size of the limiting groove (204), and the anti-collision pad (306) is slidably connected to the limiting groove (204).

5. The hinge folding device according to claim 3, characterized in that: The top of the knob (301) passes through the inner wall of the hinge housing (201) and extends to the top of the hinge housing (201); the top of the limiting toothed disc (309) is fixedly connected to the inner wall of the hinge housing (201); the bottom of the support plate (307) is elastically connected to the inner wall of the hinge housing (201) via a third spring (308); and the support plate (307) is slidably connected to the inner wall of the hinge housing (201).

6. The hinge folding device according to claim 3, characterized in that: The hinge mechanism (1) comprises a hinge shaft (101), the upper portion of the hinge shaft (101) is rotatably connected to a hinge arm (102), a slider (103) is fixedly connected to the hinge shaft (101), a limit block (104) is fixedly connected to the top of the slider (103), a first spring (105) is fixedly connected to the side of the limit block (104) away from the slider (103), a clamping block (107) is slidably connected to the slider (103), and a second spring (106) is fixedly connected to the clamping block (107).

7. The hinge folding device according to claim 6, characterized in that: The clamping block (107) is elastically connected to the inner wall of the slider (103) via the second spring (106), and the clamping block (107) penetrates the inner wall of the slider (103) and extends to the side of the slider (103).

8. The hinge folding device according to claim 6, characterized in that: The size of the clamping block (107) is matched with the size of the clamping slot (205); the clamping block (107) and the clamping slot (205) are clamped together; the sliding block (103) and the sliding slot (203) are slidably connected; the limiting block (104) and the limiting slot (204) are slidably connected; the hinge shaft (101) and the inner wall of the hinge housing (201) are rotatably connected; the limiting block (104) is elastically connected to the inner wall of the hinge housing (201) via a first spring (105); and the anti-collision pad (306) is located on a side of the limiting block (104) away from the first spring (105).

9. The hinge folding device according to claim 6, characterized in that: The fixing mechanism (4) comprises two fixing seats (401), and grooves (402) are provided at the upper and lower ends of the fixing seats (401).

10. The hinge folding device according to claim 9, characterized in that: The two hinge housings (201) are respectively installed inside two fixing seats (401) via fixing flanges (202), and the knob (301) is located inside the groove (402).

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