Folding skeleton

Abstract

The present invention discloses a folding frame, comprising: front support rods, rear support rods, upper connecting rods, and joint assemblies, all of which are arranged in pairs. The front support rods, rear support rods, and upper connecting rods are all connected to corresponding joint assemblies, and the joint assemblies enable relative rotation between the three. A front cross assembly is rotatably connected between the two front support rods and the two rear support rods, a connecting rod is rotatably connected between the front support rods and the rear support rods located on the same side, and a rear cross assembly is rotatably connected between the two connecting rods and the two rear support rods. When the two upper connecting rods are pushed forward to flip over and fold, the upper connecting rods can be linked to the front support rods and the rear support rods through the joint assemblies to rotate, and drive the front cross assembly and the rear cross assembly to fold toward the middle along the width direction. The folding frame of the present invention has a small size after folding, is easy to use, and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of foldable daily necessities, and in particular to a foldable frame. Background Art

[0002] At present, many daily necessities have foldable functions, such as foldable child strollers, pet strollers, elderly power-assisted bicycles, leisure chairs, children's dining chairs, etc., which make it easier for people to store and carry them to a certain extent.

[0003] Existing foldable products are limited by their own folding skeleton structure, resulting in the product still being very large after folding. For example, the Chinese utility model patent with application number 202120342192.X and announcement date 2021.11.09 discloses a convenient folding umbrella stroller, including a first push handle and a second push handle, the first push handle and the second push handle are respectively rotatably connected to the first rear support rod and the second rear support rod, the first rear support rod and the second rear support rod are both slidably connected to sliders, the two sets of sliders are rotatably connected to connecting members, the two sets of connecting members are respectively rotatably connected to the first bottom support rod and the second bottom support rod, the first bottom support rod and the second bottom support rod are cross-distributed and the bottom ends are respectively rotatably connected to the first push handle and the second push handle, and the two sets of connecting members are rotatably connected to the first push handle and the second push handle. A seat rod is rotatably connected between the first push handle and the second push handle. Although the first rear support rod and the second rear support rod can be folded to one side of the first push handle and the second push handle when folding, and the first push handle and the second push handle are longitudinally folded together, the length of the first push handle / the second push handle does not change after folding, resulting in the overall length being still long and the volume being large. Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a folding frame to overcome the defect that the existing foldable products are limited by their own folding frame structure, resulting in the volume of the folded product being still large.

[0005] In order to solve its technical problems, the present invention adopts a technical solution: a folding frame, comprising: a front support rod, a rear support rod, an upper connecting rod and a joint assembly, all of which are arranged in pairs, the front support rod, the rear support rod and the upper connecting rod are all connected to the corresponding joint assembly, and the three can rotate relative to each other through the joint assembly; a front cross assembly is rotatably connected between the two front support rods and the two rear support rods, a connecting rod is rotatably connected between the front support rod and the rear support rod located on the same side, and a rear cross assembly is rotatably connected between the two connecting rods and the two rear support rods; when the two upper connecting rods are pushed to flip forward for folding, the upper connecting rod can be linked to the front support rod and the rear support rod through the joint assembly to rotate relative to each other, and drive the front cross assembly and the rear cross assembly to fold toward the middle along the width direction.

[0006] As a further improvement of the present invention, the front cross assembly includes a first front fork rod and a second front fork rod distributed crosswise with the first front fork rod, the middle part of the first front fork rod is hinged to the middle part of the second front fork rod; the two ends of the first front fork rod are respectively hinged to one of the front support rods and one of the rear support rods located on different sides, and the two ends of the second front fork rod are respectively hinged to the other front support rod and the other rear support rod located on different sides.

[0007] As a further improvement of the present invention, one end of the connecting rod is hinged to the middle part of the front support rod, the middle part of the connecting rod is hinged to the middle part of the rear support rod, and the other end of the connecting rod extends backward for hinged connection with the rear cross assembly.

[0008] As a further improvement of the present invention, the rear cross assembly includes a first rear fork rod and a second rear fork rod distributed crosswise with the first rear fork rod, the middle part of the first rear fork rod is hinged to the middle part of the second rear fork rod; the two ends of the first rear fork rod are respectively hinged to one of the rear support rods and one of the connecting rods located on different sides, and the two ends of the second rear fork rod are respectively hinged to the other rear support rod and the other connecting rod located on different sides.

[0009] As a further improvement of the present invention, the joint assembly includes a joint body and a front support joint and a rear support joint that are both hinged to the joint body, the upper end of the front support rod is fixedly connected to the front support joint, the upper end of the rear support rod is fixedly connected to the rear support joint, and the lower end of the upper connecting rod is fixedly connected to the joint body; when folded, the joint body can follow the movement of the upper connecting rod so that the front support joint and the rear support joint can rotate relative to it.

[0010] As a further improvement of the present invention, a first receiving groove is provided on the front side of the joint body, the front support joint is movably arranged in the first receiving groove, and the upper end of the front support joint is hinged to the upper end of the joint body; a second receiving groove is provided on the rear side of the joint body, which is located obliquely below the upper connecting rod, the rear support joint is movably arranged in the second receiving groove, and the lower end of the rear support joint is hinged to the lower end of the joint body.

[0011] As a further improvement of the present invention, a locking mechanism for locking the rear support joint is installed in the upper connecting rod, and the locking mechanism includes a locking tongue, a spring and a traction linkage assembly. The locking tongue is slidably installed at the lower end of the upper connecting rod and is elastically supported by the spring. A locking groove is provided on the rear support joint, and the lower end of the locking tongue extends into the locking groove to limit the rotation of the rear support joint relative to the joint body; the traction linkage assembly is connected to the locking tongue and is used to pull the locking tongue upward to disengage from the locking groove when folding.

[0012] As a further improvement of the present invention, the traction linkage assembly includes a sleeve, a pull rope and a movable pin. The sleeve can be rotatably sleeved on the upper end of the upper connecting rod. The sleeve is provided with two centrally symmetrically distributed oblique grooves along the circumference, and the upper connecting rod is provided with two centrally symmetrically distributed long grooves along the axial direction. The movable pin is inserted into the two oblique grooves and the two long grooves; one end of the pull rope is fixedly connected to the movable pin, and the other end of the pull rope is fixedly connected to the lock tongue; when the sleeve rotates, it can push the movable pin to move upward along the long groove through the oblique groove, and then the movable pin pulls the lock tongue upward through the pull rope.

[0013] As a further improvement of the present invention, the folding frame also includes two upper push rods, which are rotatably connected as one through a folding button, and the lower ends of the upper push rods are fixedly connected to the sleeve; the two upper push rods can be folded around the folding button and drive the sleeve to rotate.

[0014] As a further improvement of the present invention, the folding frame also includes two seat cushion tubes for installing seat cushions, and the two rear support rods are rotatably connected to a sliding sleeve. The seat cushion tubes are slidably inserted in the sliding sleeve and hinged to the corresponding front support rod.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a folding frame, which is provided with a front support rod, a rear support rod, an upper connecting rod and a joint assembly, the front support rod, the rear support rod and the upper connecting rod are all connected to the corresponding joint assembly, and the three can rotate relative to each other through the joint assembly, the two front support rods and the two rear support rods are rotatably connected with a front cross assembly, the front support rod and the rear support rod located on the same side are rotatably connected with a connecting rod, and the two connecting rods and the two rear support rods are rotatably connected with a rear cross assembly, so that the upper connecting rod and the rear support rod can be folded to the upper and lower sides of the front support rod, and can drive the front cross assembly to rotate. The components and the rear cross components are folded toward the middle along the width direction, which can not only achieve folding in height but also achieve folding in width. The overall volume after folding is small, and the folding frame structure of the present invention is simple in design, and can be unfolded and folded by one hand, which is extremely convenient to use. At the same time, the present invention is equipped with locking mechanisms for locking the rear support joints in the two upper connecting rods, so that the folding frame of the present invention can be kept in the unfolded state, and can only be folded after the locking mechanism is operated to release the lock. In addition, the folding frame of the present invention has a wide range of applications and can be used in child strollers, power-assisted bicycles, seats, children's dining chairs and pet strollers, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the folding frame of the present invention;

[0017] Figure 2 A three-dimensional diagram of the folding frame of the present invention from another perspective;

[0018] Figure 3 is a cross-sectional view of the folding skeleton of the present invention;

[0019] Figure 4 For the present invention Figure 3 A magnified view of middle A;

[0020] Figure 5 For the present invention Figure 3 Enlarged view of middle B;

[0021] Figure 6 A perspective view of the upper connecting rod, upper push rod and traction linkage assembly in the present invention;

[0022] Figure 7 An exploded view of the upper connecting rod, upper push rod and traction linkage assembly of the present invention;

[0023] Figure 8 The folding process of the folding skeleton of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 9 The folding process of the folding skeleton of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 10 This is a schematic diagram of the foldable frame of the present invention in a fully folded state;

[0026] Figure 11 This is a perspective view of the folding frame of the present invention applied to a child stroller;

[0027] Figure 12 A perspective view of another embodiment of the foldable frame of the present invention applied to a child stroller;

[0028] Figure 13 This is a perspective view of the folding frame of the present invention applied to a power-assisted bicycle;

[0029] Figure 14 A perspective view of a folding frame of the present invention applied to a seat;

[0030] Figure 15 This is a three-dimensional diagram of the folding frame of the present invention applied to a children's dining chair;

[0031] in, Figure 1 The direction indicated by the arrow in the middle represents the corresponding orientation.

[0032] The following description is made with reference to the accompanying drawings:

[0033] 1. Front support rod; 2. Rear support rod; 3. Upper connecting rod; 31. Long slot; 4. Joint assembly; 41. Joint body; 411. First storage slot; 412. Second storage slot; 42. Front support joint; 43. Rear support joint; 431. Locking slot; 5. Lock tongue; 6. Front cross assembly; 61. First front fork rod; 62. Second front fork rod; 7. Connecting rod; 8. Rear cross assembly; 81. First rear fork rod; 82. Second rear fork rod; 9. Spring; 10. Sleeve; 101. Oblique slot; 102. Avoidance slot; 11. Pull rope; 12. Movable pin; 13. Upper push rod; 14. Folding button; 15. Cushion tube; 16. Slide; 17. Outer tube; 18. Fixing pin; 19. Limit pin; 20. Wheel; 21. Armrest; 22. Shower head frame; 23. Dinner tray. DETAILED DESCRIPTION

[0034] Several preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] See Figures 1 to 10 The present invention provides a folding frame, comprising: a front support rod 1, a rear support rod 2, an upper connecting rod 3 and a joint assembly 4, all of which are arranged in pairs. It should be noted that the pair arrangement herein means two symmetrical arrangements.

[0037] For ease of understanding, Figure 1For reference, the direction indicated by the arrow is the corresponding orientation, and the width direction is also the left and right direction.

[0038] See Figure 1 The folding frame is symmetrically provided with a front support rod 1, a rear support rod 2, an upper connecting rod 3, and a joint assembly 4 on both sides. The front support rod 1 and rear support rod 2 on the same side are arranged in an "eight" shape. The upper connecting rod 3 is located diagonally above the front support rod 1 on the same side and is parallel or approximately parallel to the front support rod 1. The joint assembly 4 is provided between the front support rod 1, the rear support rod 2, and the upper connecting rod 3. The front support rod 1, the rear support rod 2, and the upper connecting rod 3 are all connected to corresponding joint assemblies 4. The joint assembly 4 enables relative rotation between the three (i.e., the front support rod 1, the rear support rod 2, and the upper connecting rod 3).

[0039] Furthermore, a front cross assembly 6 is rotatably connected between the two front support rods 1 and the two rear support rods 2, a connecting rod 7 is rotatably connected between the front support rods 1 and the rear support rods 2 located on the same side, and a rear cross assembly 8 is rotatably connected between the two connecting rods 7 and the two rear support rods 2.

[0040] When the two upper connecting rods 3 are pushed forward to flip and fold, the upper connecting rod 3 can be linked to the front support rod 1 and the rear support rod 2 through the joint assembly 4 to rotate relative to each other, so that the upper connecting rod 3 and the rear support rod 2 can be folded to the upper and lower sides of the front support rod 1; at the same time, during the rotation of the front support rod 1, the rear support rod 2 and the upper connecting rod 3, the front cross assembly 6 and the rear cross assembly 8 can be driven to fold toward the middle along the width direction, and the front support rods 1, the rear support rod 2, the upper connecting rod 3 and the joint assembly 4 on the left and right sides will also fold toward the middle. By adopting this structural design, the folding frame of the present invention can not only achieve folding in height, but also achieve folding in width. The upper connecting rod 3 and the rear support rod 2 are both folded to the side of the front support rod 1, so that the size of the product after folding can be reduced to about half of the size before folding. The overall volume after folding is small. Compared with products on the market with roughly the same volume in the unfolded state, the volume after folding is about 30% smaller than similar products.

[0041] See Figure 3 and Figure 4 The joint assembly 4 includes a joint body 41, and a front support joint 42 and a rear support joint 43, each hingedly connected to the joint body 41. The joint body 41, the front support joint 42, and the rear support joint 43 are all plastic components. The upper end of the front support rod 1 is fixedly connected to the front support joint 42, the upper end of the rear support rod 2 is fixedly connected to the rear support joint 43, and the lower end of the upper connecting rod 3 is fixedly connected to the joint body 41.

[0042] When the upper connecting rod 3 is pushed forward to fold, the joint body 41 rotates counterclockwise along with the upper connecting rod 3. During this process, the joint body 41 and the front support joint 42 rotate relative to each other and open. At the same time, the joint body 41 also drives the rear support joint 43 to rotate counterclockwise, and the rear support joint 43 and the joint body 41 rotate relative to each other and open, until the upper connecting rod 3 and the rear support rod 2 are folded to the side of the front support rod 1.

[0043] The joint body 41 is oval in shape, with a first receiving slot 411 defined on its front side. The front support joint 42 is movably mounted within the first receiving slot 411, with its upper end hingedly connected to the upper end of the joint body 41 via a pin. A second receiving slot 412 is defined on the rear side of the joint body 41, obliquely below the upper connecting rod 3. The rear support joint 43 is movably mounted within the second receiving slot 412, with its lower end hingedly connected to the lower end of the joint body 41 via a pin. In the deployed state, the front support joint 42 is stopped and retained within the first receiving slot 411, while the rear support joint 43 is stopped and retained within the second receiving slot 412.

[0044] See Figure 1 and Figure 2 The front cross assembly 6 includes a first front fork rod 61 and a second front fork rod 62 arranged crosswise with the first front fork rod 61. The middle portion of the first front fork rod 61 and the middle portion of the second front fork rod 62 are hingedly connected via a pin. The two ends of the first front fork rod 61 are respectively hingedly connected to one of the front support rods 1 and one of the rear support rods 2 located on different sides. The two ends of the second front fork rod 62 are respectively hingedly connected to the other front support rod 1 and the other rear support rod 2 located on different sides.

[0045] Specifically, the lower end of the first front fork rod 61 is directly hinged to a right front support rod 1 near its lower end via a right-angle hinge, while the upper end of the first front fork rod 61 is directly hinged to a left rear support joint 43 via a right-angle hinge. The lower end of the second front fork rod 62 is directly hinged to a left front support rod 1 near its lower end via a right-angle hinge, while the upper end of the second front fork rod 62 is directly hinged to a right rear support joint 43 via a right-angle hinge. During the folding movement of the two front support rods 1 and the two rear support rods 2, the front cross assembly 6 is driven to move, causing the first front fork rod 61 and the second front fork rod 62 to close toward the center.

[0046] Continue reading Figure 1 and Figure 2 The connecting rod 7 is roughly distributed in the transverse direction. The front end of the connecting rod 7 is hinged to the middle part of the front support rod 1 through a pin shaft. The middle part of the connecting rod 7 is hinged to the middle part of the rear support rod 2 through a pin shaft. The rear end of the connecting rod 7 extends backward for hinge connection with the rear cross assembly 8.

[0047] The rear cross assembly 8 includes a first rear fork rod 81 and a second rear fork rod 82 arranged crosswise with the first rear fork rod 81. The middle portion of the first rear fork rod 81 is hingedly connected to the middle portion of the second rear fork rod 82. The ends of the first rear fork rod 81 are respectively hingedly connected to one of the rear support rods 2 and one of the connecting rods 7 located on different sides. The ends of the second rear fork rod 82 are respectively hingedly connected to the other rear support rod 2 and the other connecting rod 7 located on different sides.

[0048] Specifically, the lower end of the first rear fork rod 81 is hinged to a rear support rod 2 on the right side near the lower end via a U-shaped hinge, and the upper end of the first rear fork rod 81 is hinged to the rear end of a connecting rod 7 on the left side via a U-shaped hinge. The lower end of the second rear fork rod 82 is hinged to a rear support rod 2 on the left side near the lower end via a U-shaped hinge, and the upper end of the second rear fork rod 82 is hinged to the rear end of a connecting rod 7 on the right side via a U-shaped hinge. During the folding movement, the two front support rods 1 and the two rear support rods 2 can drive the rear cross assembly 8 to move via the two connecting rods 7, so that the first rear fork rod 81 and the second rear fork rod 82 are closed toward the center. The front cross assembly 6 and the rear cross assembly 8 move synchronously, jointly driving the front support rods 1, rear support rods 2, upper connecting rods 3, and joint assembly 4 on the left and right sides to fold toward the center.

[0049] See Figures 3 to 5 The two upper connecting rods 3 are both equipped with a locking mechanism for locking the rear support joint 43 so that the folding frame of the present invention remains in the unfolded state. The folding can only be performed after the locking mechanism is unlocked.

[0050] The locking mechanism includes a locking tongue 5, a spring 9, and a pull-and-pull assembly. The locking tongue 5 is slidably mounted within the lower end of the upper connecting rod 3. A receiving groove is provided in the middle of the locking tongue 5, and the spring 9 is mounted within the receiving groove. The upper connecting rod 3 is fixedly connected to the joint body 41 near its lower end via a fixing pin 18. The fixing pin 18 is inserted into the receiving groove. The upper end of the spring 9 elastically abuts against the fixing pin 18, while the lower end of the spring 9 elastically abuts against the bottom wall of the receiving groove. This ensures that the spring 9 constantly applies a downward elastic force to the locking tongue 5, and the locking tongue 5 is retained by the fixing pin 18, preventing it from disengaging from the upper connecting rod 3. A locking groove 431 is provided on the rear support joint 43, directly opposite the locking tongue 5. The lower end of the locking tongue 5 extends into the locking groove 431, locking the rear support joint 43 to prevent rotation relative to the joint body 41. The pull-and-pull assembly is connected to the locking tongue 5 and is used to pull the locking tongue 5 upward and out of the locking groove 431 during folding, thereby releasing the lock on the rear support joint 43.

[0051] Among them, the bottom of the lock tongue 5 is provided with a slope. During the process of unfolding from the folded state, the rear support joint 43 pushes the lock tongue 5 to move upward to avoid the position through the slope. After it is fully unfolded, the lock tongue 5 is reset under the elastic force of the spring 9, so that its lower end returns to the locking groove 431 to form a lock.

[0052] See Figures 5 to 7 The traction linkage assembly includes a sleeve 10, a pull rope 11, and a movable pin 12. The sleeve 10 is rotatably mounted on the upper end of the upper connecting rod 3. The sleeve 10 is provided with two arc-shaped avoidance grooves 102 symmetrically distributed along the circumference of the sleeve 10. A limit pin 19 is radially mounted on the upper connecting rod 3. Both ends of the limit pin 19 protrude from the outer circumference of the upper connecting rod 3 and are respectively inserted into the two avoidance grooves 102. The cooperation between the limit pin 19 and the avoidance grooves 102 allows the sleeve 10 to rotate about the axis relative to the upper connecting rod 3, but does not allow the sleeve 10 to move axially relative to the upper connecting rod 3.

[0053] In addition, the sleeve 10 is provided with two centrally symmetrically distributed oblique grooves 101 below the two avoidance grooves 102 along the circumferential direction. The oblique groove 101 can be regarded as a circumferential arc groove and an axial tapered groove that is wider at the top and narrower at the bottom. The upper connecting rod 3 is provided with two centrally symmetrically distributed long grooves 31 along the axial direction, and the long grooves 31 are opposite to the tapered grooves. The movable pin 12 is inserted into the two long grooves 31, and the two ends of the movable pin 12 are also inserted into the two oblique grooves 101. The pull rope 11 is arranged inside the upper connecting rod 3, one end of which is fixedly connected to the movable pin 12, and the other end of which is fixedly connected to the lock tongue 5.

[0054] like Figure 6 As shown, in the expanded state, the movable pin 12 is located at the lower end of the tapered grooves of the long groove 31 and the oblique groove 101. When the sleeve 10 rotates, it can push the movable pin 12 to move upward along the long groove 31 through the tapered groove of the oblique groove 101. At the same time, the movable pin 12 slides from the tapered groove of the oblique groove 101 and stays at the arc groove, and then the movable pin 12 pulls the lock tongue 5 upward through the pull rope 11 to release the lock.

[0055] The outer tube 17 is fixedly mounted on the outer side of the sleeve 10 .

[0056] See again Figure 1 and Figure 6 The folding frame of the present invention also includes two upper push rods 13, which are rotatably connected to each other via a folding button 14. The folding button 14 is conventional technology and does not constitute an improvement of the present invention, so it will not be described in detail. The folding button 14 enables the two upper push rods 13 to fold. The lower ends of the two upper push rods 13 are fixedly connected to the two sleeves 10, respectively. The two upper push rods 13 can fold around the folding button 14 and drive the sleeves 10 to rotate.

[0057] The folding process of the folding skeleton of the present invention is as follows:

[0058] Initially, the frame is in the unfolded state. Press the folding button 14 and push the upper push rod 13 forward. The two upper push rods 13 will rotate around the folding button 14 (this movement is allowed by the gap and deformation between the joint body 41, the front support joint 42 and the rear support joint 43). The upper push rod 13 drives the sleeve 10 to rotate synchronously. During the rotation of the sleeve 10, the movable pin 12 is pushed upward, and the lock tongue 5 is pulled upward by the pull rope 11 to release the lock. Figure 8 and Figure 9 As shown, in the process of pushing the upper push rod 13 next, the upper push rod 13 drives the upper connecting rod 3 to move forward, and the joint body 41 follows the movement of the upper connecting rod 3, so that the front support joint 42 and the rear support joint 43 are rotated relative to it to open, and the front support rod 1 and the rear support rod 2 also follow the movement. In the process of the front support rod 1 and the rear support rod 2 moving, the front cross assembly 6 and the rear cross assembly 8 can be driven to retract toward the middle along the width direction, so that the front support rod 1, the rear support rod 2, the upper connecting rod 3 and the joint assembly 4 on the left and right sides follow and retract toward the middle; as shown Figure 10 As shown, until the upper connecting rod 3 and the rear support rod 2 are folded to the upper and lower sides of the front support rod 1, they reach a fully folded state.

[0059] It can be seen that the foldable frame of the present invention has the function of folding and unfolding with one hand, which is extremely convenient to use.

[0060] In other embodiments of the present invention, the two upper push rods 13 may also be separate, that is, the two upper push rods 13 are not connected by the folding button 14, and the folding function can still be achieved. In this embodiment, when the upper push rod 13 is pushed, it is also necessary to rotate it to drive the sleeve 10 to rotate and pull the lock tongue 5 to unlock.

[0061] In addition, the folding frame of the present invention also includes two seat cushion tubes 15 for mounting seat cushions. The two rear support rods 2 are rotatably connected to a sliding sleeve 16. The sliding sleeve 16 is specifically hinged to one side of the rear support joint 43 through a pin. The seat cushion tube 15 is slidably inserted into the sliding sleeve 16 and is hinged to the corresponding front support rod 1. In the unfolded state, the two seat cushion tubes 15 are roughly horizontally distributed. In the folded state, the two seat cushion tubes 15 can be folded to the side of the upper end of the front support rod 1 and are roughly parallel to the front support rod 1 (such as Figure 10 shown).

[0062] It should be noted that the seat tube 15 is an optional component. For example, when the folding frame of the present invention is applied to a power-assisted bicycle, the seat tube 15 may not be included.

[0063] Example 2

[0064] See Figure 11 The present invention further provides a child stroller, comprising the folding frame of the first embodiment, wherein wheels 20 are mounted on the bottoms of the two front support rods 1 and the two rear support rods 2 of the folding frame. The child stroller of the present invention achieves a folding function by means of the folding frame.

[0065] Example 3

[0066] See Figure 12 The present invention further provides a child stroller, comprising the folding frame of the first embodiment, wherein wheels 20 are mounted on the bottoms of the two front support rods 1 and the two rear support rods 2 of the folding frame. The child stroller of the present invention achieves a folding function by means of the folding frame.

[0067] In addition, a shower head frame 22 is installed between the two upper connecting rods 3 of the folding frame for installing the shower head. An armrest 21 is installed between the two joint components 4 of the folding frame for children to hold.

[0068] The shower head frame 22 and the armrest 21 are both made of soft materials, such as PVC, so that the shower head frame 22 and the armrest 21 can be folded along with the folding frame.

[0069] Example 4

[0070] See Figure 13 The present invention also provides a power-assisted bicycle, comprising a folding frame with the seat tube 15 and the sliding sleeve 16 removed from the first embodiment, and wheels 20 are installed at the bottom of the two front support rods 1 and the two rear support rods 2 of the folding frame. The power-assisted bicycle realizes the folding function through the folding frame.

[0071] Example 5

[0072] See Figure 14 The present invention also provides a chair that utilizes the folding frame of the first embodiment. The bottoms of the two front support rods 1 and the two rear support rods 2 of the folding frame directly serve as the chair support feet or are equipped with footrests to support the bottom surface. The chair of the present invention achieves folding function through the folding frame.

[0073] Example 6

[0074] See Figure 15 The present invention also provides a children's dining chair that utilizes the folding frame of the first embodiment. The bottoms of the two front support rods 1 and the two rear support rods 2 of the folding frame directly serve as the chair's support legs, or alternatively, they may be equipped with footrests to support the chair's support. A dining tray 23 is removably mounted between the two joint assemblies 4 of the folding frame. To fold the chair, the tray 23 can be removed before folding. The folding function of the children's dining chair of the present invention is achieved through the folding frame.

[0075] Example 7

[0076] The present invention further provides a pet stroller comprising the folding frame of the first embodiment, wherein wheels 20 are mounted at the bottoms of the two front support bars 1 and the two rear support bars 2 of the folding frame. A pet basket can be attached to the folding frame to accommodate a pet. The pet stroller of the present invention achieves folding functionality through the folding frame.

[0077] Although the folding frame of the present invention has been exemplified above as being applicable to child strollers, power-assisted strollers, seats, children's dining chairs, and pet strollers, it is not limited thereto. The present invention can be implemented in many other ways than those described herein.

[0078] Thus, the present invention provides a folding frame, which is provided with a front support rod 1, a rear support rod 2, an upper connecting rod 3 and a joint assembly 4. The front support rod 1, the rear support rod 2 and the upper connecting rod 3 are all connected to the corresponding joint assembly 4, and the joint assembly 4 enables relative rotation between the three. The two front support rods 1 and the two rear support rods 2 are rotatably connected with a front cross assembly 6, and the front support rods 1 and the rear support rods 2 on the same side are rotatably connected with a connecting rod 7, and the two connecting rods 7 and the two rear support rods 2 are rotatably connected with a rear cross assembly 8, so that the upper connecting rod 3 and the rear support rods are rotatably connected. The support rod 2 can be folded to the upper and lower sides of the front support rod 1, and can drive the front cross component 6 and the rear cross component 8 to fold toward the middle along the width direction, which can not only achieve folding in height, but also achieve folding in width. The overall volume after folding is small, and the folding skeleton structure of the present invention is simple in design, and can be unfolded and folded by one hand, which is extremely convenient to use; in addition, the present invention is equipped with a locking mechanism for locking the rear support joint 43 in both upper connecting rods 3 to keep the folding skeleton of the present invention in the unfolded state, and folding can only be performed after the locking mechanism is operated to release the lock.

[0079] In addition, the foldable frame of the present invention has a wide range of applications and can be applied to child strollers, power-assisted bicycles, seats, children's dining chairs, pet strollers, etc.

[0080] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A folding frame, characterized in that: include: The front support rod (1), the rear support rod (2), the upper connecting rod (3) and the joint assembly (4) are all arranged in pairs. The front support rod (1), the rear support rod (2) and the upper connecting rod (3) are all connected to the corresponding joint assembly (4), and the three can rotate relative to each other through the joint assembly (4); a front cross assembly (6) is rotatably connected between the two front support rods (1) and the two rear support rods (2), and a connecting rod (7) is rotatably connected between the front support rod (1) and the rear support rod (2) located on the same side, and the two connecting rods (7) are connected to the two A rear cross assembly (8) is rotatably connected between the rear support rods (2); when the two upper connecting rods (3) are pushed to flip forward for folding, the upper connecting rods (3) can be linked to the front support rods (1) and the rear support rods (2) through the joint assembly (4) to rotate relative to each other, and drive the front cross assembly (6) and the rear cross assembly (8) to fold toward the middle along the width direction; the front cross assembly (6) includes a first front fork rod (61) and a second front fork rod (62) arranged in a cross-distribution with the first front fork rod (61), and the middle part of the first front fork rod (61) is connected to the second front fork rod (62). The middle part of the rod (62) is hinged; the two ends of the first front fork rod (61) are respectively hinged to one of the front support rods (1) and one of the rear support rods (2) located on different sides, and the two ends of the second front fork rod (62) are respectively hinged to the other front support rod (1) and the other rear support rod (2) located on different sides; one end of the connecting rod (7) is hinged to the middle part of the front support rod (1), the middle part of the connecting rod (7) is hinged to the middle part of the rear support rod (2), and the other end of the connecting rod (7) extends backward for hinge connection with the rear cross assembly (8); the joint The component (4) comprises a joint body (41) and a front support joint (42) and a rear support joint (43) both of which are hinged to the joint body (41); the upper end of the front support rod (1) is fixedly connected to the front support joint (42), the upper end of the rear support rod (2) is fixedly connected to the rear support joint (43), and the lower end of the upper connecting rod (3) is fixedly connected to the joint body (41); when folded, the joint body (41) follows the movement of the upper connecting rod (3) so that the front support joint (42) and the rear support joint (43) can rotate relative to it.

2. The folding frame according to claim 1, characterized in that: The rear cross assembly (8) comprises a first rear fork rod (81) and a second rear fork rod (82) arranged crosswise with the first rear fork rod (81), wherein the middle portion of the first rear fork rod (81) is hinged to the middle portion of the second rear fork rod (82); the two ends of the first rear fork rod (81) are respectively hinged to one of the rear support rods (2) and one of the connecting rods (7) located on different sides, and the two ends of the second rear fork rod (82) are respectively hinged to another rear support rod (2) and another connecting rod (7) located on different sides.

3. The folding frame according to claim 1, characterized in that: The front side of the joint body (41) is provided with a first receiving groove (411), the front support joint (42) is movably arranged in the first receiving groove (411), and the upper end of the front support joint (42) is hinged to the upper end of the joint body (41); the rear side of the joint body (41) is provided with a second receiving groove (412) located obliquely below the upper connecting rod (3), the rear support joint (43) is movably arranged in the second receiving groove (412), and the lower end of the rear support joint (43) is hinged to the lower end of the joint body (41).

4. The folding frame according to claim 1, characterized in that: A locking mechanism for locking the rear support joint (43) is installed in the upper connecting rod (3), and the locking mechanism includes a locking tongue (5), a spring (9) and a traction linkage assembly. The locking tongue (5) is slidably installed on the lower end of the upper connecting rod (3) and is elastically supported by the spring (9). A locking groove (431) is provided on the rear support joint (43), and the lower end of the locking tongue (5) extends into the locking groove (431) to limit the rear support joint (43) from rotating relative to the joint body (41); the traction linkage assembly is connected to the locking tongue (5) and is used to pull the locking tongue (5) upward to disengage from the locking groove (431) when folding.

5. The folding frame according to claim 4, characterized in that: The traction linkage assembly comprises a sleeve (10), a pull rope (11) and a movable pin (12); the sleeve (10) is rotatably sleeved on the upper end of the upper connecting rod (3); the sleeve (10) is provided with two centrally symmetrically distributed oblique grooves (101) along the circumferential direction; the upper connecting rod (3) is provided with two centrally symmetrically distributed long grooves (31) along the axial direction; the movable pin (12) is inserted into the two oblique grooves (101) and the two long grooves (31); one end of the pull rope (11) is fixedly connected to the movable pin (12), and the other end of the pull rope (11) is fixedly connected to the lock tongue (5); when the sleeve (10) rotates, it can push the movable pin (12) to move upward along the long groove (31) through the oblique groove (101), and then the movable pin (12) pulls the lock tongue (5) upward through the pull rope (11).

6. The folding frame according to claim 5, characterized in that: The invention also includes two upper push rods (13), which are connected to each other through a folding button (14) and are connected to each other in a rotating manner. The lower ends of the upper push rods (13) are fixedly connected to the sleeve (10); the two upper push rods (13) can be folded around the folding button (14) and drive the sleeve (10) to rotate.

7. The folding frame according to claim 1, characterized in that: It also includes two seat cushion tubes (15) for installing seat cushions, and the two rear support rods (2) are rotatably connected to a sliding sleeve (16), and the seat cushion tubes (15) are slidably inserted into the sliding sleeve (16) and hinged to the corresponding front support rod (1).

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