Rotating joints and children's products containing them

Abstract

The rotating joint includes a base (16), a first connecting seat (17) and a second connecting seat (18). The first connecting seat (17) and the second connecting seat (18) are rotatably connected via a first rotating shaft (6). A second rotating shaft (7) is further provided between the first connecting seat (17), the second connecting seat (18) and the base (16). The first rotating shaft (6) and the second rotating shaft (7) are provided in parallel, and a second rotating shaft (7) is provided between the first connecting seat (17) and the base (16). A first interlocking means is provided between the base (16) and the second connecting seat (18), and a second interlocking means is provided between the base (16) and the second connecting seat (18), and the first interlocking means interlocks the first connecting seat (17) to rotate relative to the second connecting seat (18) when the base (16) rotates relative to the second connecting seat (18), and the second interlocking means interlocks the second connecting seat (18) to rotate relative to the first connecting seat (17). This joint realizes rotation of the base (16) in different states, and can interlock the rotation of the first and second connecting seats (17, 18) in both states, simplifying the operation steps and the structure of the joint, which is used in children's products, simplifying the structure of the children's products and making the entire product lighter. The present invention also relates to a children's product to which this rotating joint is applied.

Description

[Technical Field]

[0001] The present invention relates to the field of children's products, and more particularly to a revolute joint and a children's product including the same. [Background technology]

[0002] In the prior art, many children's products include multiple rods that rotate relative to one another, allowing them to be transformed between different states. Usually, when three or more rods that are rotatably connected to one another are connected to one rotary joint, the structural design of the rotary joint becomes complicated, and the rods are not interlocked with each other and need to be rotated individually, which not only makes the operation cumbersome but also complicates the structure. Summary of the Invention [Problem to be solved by the invention]

[0003] In order to solve the problems existing in the prior art, the present invention aims to provide a rotary joint that has a simple structure and allows different rods to rotate in unison, and a child's product including the same. [Means for solving the problem]

[0004] In order to achieve the above object, the technical solution adopted in the present invention is a rotary joint, comprising a base, a first connecting seat, and a second connecting seat, the first connecting seat and the second connecting seat being rotatably connected via a first rotating shaft, a second rotating shaft being further provided between the first connecting seat, the second connecting seat, and the base, the axis of the first rotating shaft and the axis of the second rotating shaft being parallel to each other, a first interlocking means being provided between the first connecting seat and the base, and a first interlocking means being provided between the second connecting seat and the base. A second interlocking means is provided between the base and the second connecting seat, and the first interlocking means interlocks the first connecting seat to rotate about the first rotating shaft relative to the second connecting seat in a second direction opposite to the first direction when the base rotates about the second rotating shaft relative to the first connecting seat, and the second interlocking means interlocks the second connecting seat to rotate about the first rotating shaft relative to the first connecting seat in the first direction when the base rotates about the second rotating shaft relative to the first connecting seat.

[0005] Furthermore, the first interlocking means includes a first pin roll provided on the base and a first chute opened in the first connecting sheet, the first pin roll is inserted by sliding and turning through the first chute, and the axis of the first pin roll is parallel to the axis of the first rotating shaft or the axis of the second rotating shaft, and / or the second interlocking means includes a second pin roll provided on the base and a second chute opened in the second connecting sheet, the second pin roll is inserted by sliding and turning through the second chute, and the axis of the second pin roll is parallel to the axis of the first rotating shaft or the axis of the second rotating shaft.

[0006] According to some embodiments of the present invention, the first pin roll is fixedly installed on the base, a first retraction groove is opened in the first connecting sheet in the direction of rotation and extension of the first pin roll corresponding to the position of the first pin roll, one end of the first retraction groove is connected to one end of the first chute, and / or the second pin roll is fixedly installed on the base, a second retraction groove is opened in the second connecting sheet in the direction of rotation and extension of the second pin roll corresponding to the position of the second pin roll, one end of the second retraction groove is connected to one end of the second chute.

[0007] Furthermore, the first and second retraction grooves are each located above the first rotary shaft.

[0008] Furthermore, when the base rotates relative to the second connecting sheet, the first pin roll drives the first connecting sheet to rotate relative to the second connecting sheet by sliding and rotating the first chute relative to the first connecting sheet, and the second pin roll slides in the second retraction groove along the length of the second retraction groove, and when the base rotates relative to the first connecting sheet, the second pin roll drives the second connecting sheet to rotate relative to the first connecting sheet by sliding and rotating the second chute relative to the first connecting sheet, and the first pin roll slides in the first retraction groove along the length of the first retraction groove.

[0009] According to some embodiments of the present invention, the first pin roll and the second pin roll are respectively located on opposite sides of the second rotating shaft, and the first pin roll and the second pin roll are respectively base and / or the first chute and the second chute are each located above the first rotating shaft.

[0010] According to some embodiments of the present invention, in a plane perpendicular to the axial extension direction of the first rotating shaft, the center of the first pin roll, the center of the second rotating shaft, and the center of the second pin roll are located on the same straight line.

[0011] According to some embodiments of the present invention, the second rotating shaft passes through and is fixed to the base.

[0012] According to some embodiments of the present invention, the first connecting seat, the base, and the second connecting seat are provided in this order in the axial extension direction of the first rotating shaft.

[0013] According to some embodiments of the present invention, the second rotating shaft is fixedly installed on the base, a first arc-shaped limit slot is formed in the first connecting seat corresponding to the position of the second rotating shaft and having its center at the shaft center of the first rotating shaft, and a second arc-shaped limit slot is formed in the second connecting seat corresponding to the position of the second rotating shaft and having its center at the shaft center of the first rotating shaft, when the base rotates relative to the second connecting seat, the second rotating shaft slides in the first limit slot along the length of the first limit slot, and the second rotating shaft always abuts against one end of the second limit slot, and when the base rotates relative to the first connecting seat, the second rotating shaft slides in the second limit slot along the length of the second limit slot, and the second rotating shaft always abuts against one end of the first limit slot.

[0014] Furthermore, the first limit slot and the second limit slot are each located above the first rotary shaft.

[0015] According to some embodiments of the invention, the first rotatable shaft is located below the second rotatable shaft.

[0016] Another technical solution used in the present invention is a stroller comprising: a stroller frame having a folded and unfolded state; a front wheel assembly provided at a bottom front part of the stroller frame; and a rear wheel assembly provided at a bottom rear part of the stroller frame; the stroller frame comprises a putter, a front bracket having the front wheel assembly provided at a bottom part thereof, and a rear bracket having the rear wheel assembly provided at a bottom part thereof; the putter, the front bracket, and the rear bracket are connected via the above-mentioned rotating joint; a base is provided at a bottom part of the putter; the first connecting seat is provided at an upper part of the front bracket; and the second connecting seat is provided at an upper part of the rear bracket.

[0017] Furthermore, the putter has a forward use state and a backward use state, the stroller frame has a first folded state after folding the putter from the forward use state and a second folded state after folding the putter from the backward use state, the stroller frame drives the putter to rotate and approach the rear bracket when the putter is folded from the forward use state, and rotates the base with respect to the second connecting seat, the first interlocking means interlocks the first connecting seat to rotate with respect to the second connecting seat, and further rotates the front bracket with respect to the rear bracket and approaches, and the stroller frame drives the putter to rotate and approach the rear bracket when the putter is folded from the forward use state. When the stroller frame is in the first folded state, the putter and rear bracket are located rearward of the front bracket in the fore-and-aft direction, and when the stroller frame is folded from the reverse use state of the putter, it drives the putter to rotate closer to the front bracket, and the second linkage means links the second connecting seat to rotate relative to the first connecting seat and further rotates the rear bracket closer to the front bracket, and when the stroller frame is in the second folded state, the putter and front bracket are located frontward of the rear bracket in the fore-and-aft direction.

[0018] In some preferred specific embodiments, the first connecting seat, the base, and the second connecting seat are sequentially provided in the left-right direction of the stroller.

[0019] Another technical solution adopted in the present invention is a product for children, comprising a base rod, a first bracket rod, and a second bracket rod, the base rod, the first bracket rod, and the second bracket rod being connected via the above-mentioned rotary joint, the base being provided on one of the base rod, the first bracket rod, and the second bracket rod, the first connecting seat being provided on one of the other two of the three, and the second connecting seat being provided on the other of the other two, and the rod provided with the base is located between the rod provided with the first connecting seat and the rod provided with the second connecting seat.

[0020] Furthermore, the base is provided on the base rod, the first connecting seat is provided on the first bracket rod, and the second connecting seat is provided on the second bracket rod, and the first bracket rod and the second bracket rod are respectively located on opposite sides of the base rod.

[0021] In some specific embodiments, the children's product is a stroller, a children's seat pack, a children's bed, or a rocking chair.

[0022] By applying the above technical solutions, the present invention has the following advantages over the prior art:

[0023] In the rotary joint of the present invention, when the base rotates relative to the second connecting seat, the first interlocking means interlocks the first connecting seat to rotate relative to the second connecting seat, and when the base rotates relative to the first connecting seat, the second interlocking means interlocks the second connecting seat to rotate relative to the first connecting seat, thereby realizing rotation of the base in different states, and both can interlock the rotation of the first connecting seat and the second connecting seat, simplifying the operating steps. This rotary joint has a simple structure and can be used in children's products, simplifying the structure of children's products and making them lighter overall. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic side view of a stroller in an unfolded state according to an embodiment of the present invention (when the putter is used in the forward direction). [Figure 2] FIG. 2 is an enlarged schematic view of part A in FIG. [Figure 3] 1 is a perspective view of a stroller according to an embodiment of the present invention in an unfolded state (with the putter facing forward); FIG. [Figure 4] 1 is a schematic side view of a stroller according to an embodiment of the present invention when folded in half (with the putter facing in the forward direction). FIG. [Figure 5] FIG. 5 is an enlarged schematic view of part B in FIG. [Figure 6] 1 is a perspective view of a stroller according to an embodiment of the present invention when folded in half (with the putter facing in the forward direction). FIG. [Figure 7] 1 is a schematic side view of a stroller according to an embodiment of the present invention when folded in half (putter forward position); FIG. [Figure 8] FIG. 8 is an enlarged schematic view of part C in FIG. 7. [Figure 9] 1 is a perspective view showing a stroller according to an embodiment of the present invention in a first folded state; [Figure 10] FIG. 1 is a perspective view showing a stroller according to an embodiment of the present invention in an unfolded state (when the putter is used in the reverse direction). [Figure 11] FIG. 11 is an enlarged schematic view of part C in FIG. [Figure 12] FIG. 1 is a perspective view showing a stroller according to an embodiment of the present invention in an unfolded state (when the putter is used in the reverse direction). [Figure 13] FIG. 1 is a schematic side view of a stroller according to an embodiment of the present invention when folded in half (using the putter in the reverse direction). [Figure 14] FIG. 14 is an enlarged schematic view of part E in FIG. [Figure 15] FIG. 1 is a perspective view of a stroller according to an embodiment of the present invention when folded in half (using the putter in the reverse direction). [Figure 16] 1 is a schematic side view of the stroller of the embodiment of the present invention in the second folded state (when the putter is used in the reverse direction). FIG. [Figure 17] FIG. 17 is an enlarged schematic view of part F in FIG. 16. [Figure 18] FIG. 2 is a perspective view showing the stroller of the embodiment of the present invention in the second folded state (when the putter is used in the reverse direction). [Figure 19] 1 is an exploded perspective view showing a schematic configuration of a stroller according to an embodiment of the present invention; [Figure 20] 1 is an exploded perspective view showing a schematic configuration of a stroller according to an embodiment of the present invention; [Figure 21] FIG. 21 is an enlarged schematic view of part G in FIG. 20. [Figure 22] This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in an unfolded state (the putter is used in the forward direction and the seat pack frame is attached in the forward direction). [Figure 23] This is a schematic perspective view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in an unfolded state (the putter is used in the forward direction and the seat pack frame is attached in the forward direction). [Figure 24]This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in the first folded state (the putter is used in the forward direction and the seat pack frame is attached in the forward direction). [Figure 25] This is a schematic perspective view of the stroller of one embodiment of the present invention when the stroller is in the first folded state after the seat pack frame is attached (the putter is used in the forward direction and the seat pack frame is attached in the forward direction). [Figure 26] This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in an unfolded state (the putter is used in the reverse direction and the seat pack frame is attached in the forward direction). [Figure 27] FIG. 1 is a perspective view of a stroller according to an embodiment of the present invention in an unfolded state after a seat pack frame is attached thereto (the putter is used in the reverse direction and the seat pack frame is attached in the forward direction). [Figure 28] This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in the second folded state (the putter is used in the reverse direction and the seat pack frame is attached in the forward direction). [Figure 29] This is a schematic perspective view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in the second folded state (the putter is used in the reverse direction and the seat pack frame is attached in the forward direction). [Figure 30] This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in an unfolded state (the putter is used in the forward direction and the seat pack frame is attached in the reverse direction). [Figure 31] FIG. 1 is a perspective view of a stroller according to an embodiment of the present invention in an unfolded state after a seat pack frame is attached thereto (the putter is used in the forward direction and the seat pack frame is attached in the reverse direction). [Figure 32]This is a schematic side view of the stroller of one embodiment of the present invention when the stroller is in the first folded state after the seat pack frame is attached (the putter is used in the forward direction and the seat pack frame is attached in the reverse direction). [Figure 33] This is a schematic perspective view of the stroller of one embodiment of the present invention when it is in the first folded state after the seat pack frame is attached (the putter is used in the forward direction and the seat pack frame is attached in the reverse direction). [Figure 34] This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in an unfolded state (the putter is used in the reverse direction and the seat pack frame is attached in the reverse direction). [Figure 35] FIG. 1 is a perspective view of a stroller according to an embodiment of the present invention in an unfolded state after a seat pack frame is attached thereto (the putter is used in the reverse direction and the seat pack frame is attached in the reverse direction). [Figure 36] This is a schematic side view of the stroller of one embodiment of the present invention when the seat pack frame is attached and the stroller is in the second folded state (the putter is used in the reverse direction and the seat pack frame is attached in the reverse direction). [Figure 37] This is a schematic perspective view of the stroller of one embodiment of the present invention when it is in the second folded state after the seat pack frame is attached (the putter is used in the reverse direction and the seat pack frame is attached in the reverse direction). DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention will now be further described with reference to the drawings and specific examples in the specification.

[0026] In describing the present invention, it should be explained that the orientations or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," "side-to-side," "height," "up-down," and "front-to-back" are based on Fig. 1, and the orientations or positional relationships indicated when a child is in the stroller are merely for ease and simplification of the description of the present invention, and do not indicate or suggest that the indicated devices or elements have a particular orientation, have only a particular orientation, or must be constructed and operated in a particular orientation, and should not be understood as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] The children's product as shown in Figs. 1 to 21 includes a base rod, a first bracket rod, and a second bracket rod that are rotatably connected to each other, and the base rod, the first bracket rod, and the second bracket rod are connected via a rotation joint, and the rotation joint includes a base 16, a first connecting seat 17, and a second connecting seat 18, and the base 16 may be provided on the base rod, the first connecting seat 17 may be provided on one of the first bracket rod and the second bracket rod, and the second connecting seat 18 may be provided on the other of the first bracket rod and the second bracket rod, or the base 16 may be provided on the first bracket rod, The first connecting sheet 17 may be provided on one of the base rod and the second bracket rod, and the second connecting sheet 18 may be provided on the other of the base rod and the second bracket rod; alternatively, the base 16 may be provided on the second bracket rod, and the first connecting sheet 17 may be provided on one of the base rod and the first bracket rod, and the second connecting sheet 18 may be provided on the other of the base rod and the first bracket rod. Regardless of the installation method, the base 16, the first connecting sheet 17, and the second connecting sheet 18 must satisfy the condition that the rod on which the base 16 is provided is located between the other two rods.

[0028] In this example, a stroller is exemplified as a product for children. Specifically, the stroller as shown in FIGS. 1 to 21 includes a stroller frame 100 having a folded and unfolded state, a front wheel assembly 4 provided at the bottom front part of the stroller frame 100, a rear wheel assembly 5 provided at the bottom rear part of the stroller frame 100, and a locking mechanism for locking the stroller frame 100 in the unfolded state. The stroller frame 100 includes symmetrically installed side stands, each side of which includes a putter 1, a front bracket 2 provided at the bottom with the front wheel assembly 4, and a rear wheel assembly 5 at the bottom. The putter 1, front bracket 2, and rear bracket 3 on each side are connected via a rotary joint, and one of the putter 1, front bracket 2, and rear bracket 3 on each side is provided with a base 16, one of the other two rods is provided with a first connecting seat 17, and the other of the other two rods is provided with a second connecting seat 18, and the rod provided with the base 16 is located between the rod provided with the first connecting seat 17 and the rod provided with the second connecting seat 18.

[0029] In this example, a base 16 is provided on the putter 1, a first connecting seat 17 is provided on the front bracket 2, and a second connecting seat 18 is provided on the rear bracket 3; that is, the putter 1 forms a base rod, the front bracket 2 forms a first bracket rod, and the rear bracket 3 forms a second bracket rod; the base rod, the first bracket rod, and the second bracket rod are connected via a rotary joint; that is, the putter 1, the front bracket 2, and the rear bracket 3 are connected via a rotary joint.

[0030] This rotary joint includes a base 16, a first connecting seat 17, and a second connecting seat 18 that are rotatably connected to one another, the base 16 being fixedly installed at the lower end of the putter 1, the first connecting seat 17 being fixedly installed at the upper end of the front bracket 2, and the second connecting seat 18 being fixedly installed at the upper end of the rear bracket 3, the first connecting seat 17 and the second connecting seat 18 being rotatably connected via a first rotary shaft 6, The first connecting sheet 17 and the second connecting sheet 18 are rotatably connected via the base 16 and the second rotating shaft 7, the axis of the first rotating shaft 6 and the axis of the second rotating shaft 7 are arranged in parallel, a first interlocking means is provided between the first connecting sheet 17 and the base 16, and a second interlocking means is provided between the second connecting sheet 18 and the base 16, and the first interlocking means is configured to rotate the base 16 around the second rotating shaft 7 relative to the second connecting sheet 18 in a first direction. When the putter 1 rotates, the first connecting seat 17 is interlocked (driven) to rotate relative to the second connecting seat 18 around the first rotating shaft 6 in a second direction opposite to the first direction; that is, the first interlocking means interlocks (drives) the front bracket 2 to rotate around the first rotating shaft 6 relative to the rear bracket 3 when the putter 1 rotates around the second rotating shaft 7 relative to the rear bracket 3; as shown in FIG. 1, the first direction is the clockwise direction and the second direction is the counterclockwise direction; and as shown in FIG. 10, the second interlocking means interlocks (drives) the second connecting seat 18 to rotate around the first rotating shaft 6 relative to the first connecting seat 17 in the first direction when the base 16 rotates around the second rotating shaft 7 relative to the first connecting seat 17; that is, the second interlocking means interlocks (drives) the rear bracket 3 to rotate relative to the front bracket 2 when the putter 1 rotates relative to the front bracket 2.

[0031] The first interlocking means includes a first pin roll 8 provided on the base 16 and a first chute 10 opened in the first connecting sheet 17, the first pin roll 8 being slidably inserted into the first chute 10 by a screw fit, and the axis of the first pin roll 8 being parallel to the axis of the first rotating shaft 6 or the axis of the second rotating shaft 7, the second interlocking means includes a second pin roll 9 provided on the base 16 and a second chute 11 opened in the second connecting sheet 18, the second pin roll 9 being slidably inserted into the second chute 11 by a screw fit, and the axis of the second pin roll 9 being parallel to the axis of the first rotating shaft 6 or the axis of the second rotating shaft 7. The first connecting seat 17, the base 16, and the second connecting seat 18 are arranged in this order in the left-right direction of the stroller, so that the rotation of the first connecting seat 17 and the second connecting seat 18 does not interfere with each other.

[0032] Referring to FIG. 21, the first pin roll 8 is fixedly installed on the base 16, the first chute 10 is opened in the first connecting sheet 17, a first retraction groove 12 is opened in the first connecting sheet 17 along the rotational extension direction of the first pin roll 8 in accordance with the position of the first pin roll 8, the first retraction groove 12 is for retracting the first pin roll 8, one end of the first retraction groove 12 is connected to one end of the first chute 10, and the connection point where the first retraction groove 12 and the first chute 10 are connected is called a first intersection P. The second pin roll 9 is fixedly installed on the base 16, the second chute 11 is opened in the second connecting sheet 18, a second retraction groove 13 is opened in the second connecting sheet 18 along the rotational extension direction of the second pin roll 9 to correspond to the position of the second pin roll 9, the second retraction groove 13 is for retracting the second pin roll 9, one end of the second retraction groove 13 is connected to one end of the second chute 11, and the connection point where the second retraction groove 13 and the second chute 11 are connected is referred to as a second intersection Q. When the putter 1 rotates relative to the rear bracket 3, the first pin roll 8 slides and rotates the first chute 10 relative to the front bracket 2, thereby driving the front bracket 2 to rotate relative to the rear bracket 3, and the second pin roll 9 slides in the second retraction groove 13 along the length of the second retraction groove 13.When the putter 1 rotates relative to the front bracket 2, the second pin roll 9 slides and rotates the second chute 11 relative to the front bracket 2, thereby driving the rear bracket 3 to rotate relative to the front bracket 2, and the first pin roll 8 slides in the first retraction groove 12 along the length of the first retraction groove 12.

[0033] The first connecting sheet 17, base 16, and second connecting sheet 18 are arranged in this order in the axial extension direction of the first rotating shaft 6, the second rotating shaft 7 is fixed to the base 16 through which it passes, and the first pin roll 8 is located on one side of the base 16 and the second pin roll 9 is located on the second side of the base 16 in the axial extension direction of the first rotating shaft 6, the first pin roll 8 and the second pin roll 9 are located on both sides of the second rotating shaft 7, the first chute 10, the second chute 11, the first retraction groove 12, and the second retraction groove 13 are located above the first rotating shaft 6, and the first rotating shaft 6 is located below the second rotating shaft 7.

[0034] In the first connecting seat 17, an arc-shaped first limit slot 14 is formed corresponding to the position of the second rotating shaft 7, with its center at the shaft center of the first rotating shaft 6. The first limit slot 14 intersects with the first retraction groove 12, and the position of this intersection is located above the first intersection P. The first limit slot 14 has a first end M, and the first retraction groove 12 is an arc-shaped groove formed with its center at the center of the first end M. In the second connecting seat 18, an arc-shaped second limit slot 15 is formed corresponding to the position of the second rotating shaft 7, with its center at the shaft center of the first rotating shaft 6. The second limit slot 15 intersects with the first retraction groove 13 and the position of this intersection is located above the second intersection Q. The second limit slot 15 has a second end N, and the second escape groove 13 is an arc groove formed with the center of the second end N as the center of the circle.

[0035] When the putter 1 rotates relative to the rear bracket 3, the second rotating shaft 7 slides through the first limit slot 14 along the length of the first limit slot 14, and the second rotating shaft 7 always abuts against one end of the second limit slot 15, i.e., the second rotating shaft 7 always abuts against the second end N of the second limit slot 15. When the putter 1 rotates relative to the front bracket 2, the second rotating shaft 7 slides through the second limit slot 15 along the length of the second limit slot 15, and the second rotating shaft 7 always abuts against one end of the first limit slot 14, i.e., the second rotating shaft 7 always abuts against the first end M of the first limit slot 14.

[0036] In this example, the locking mechanism for locking the stroller frame in the unfolded state is not a design point of the present invention, and may be of conventional technology and is not limited by the present invention. 19, the locking mechanism includes a slider 27 slidably mounted on the base 16, a locking pin 28 fixedly mounted on one end of the slider 27, and a first locking groove 29 and a second locking groove 30 sequentially formed in the second connecting seat 18 in the circumferential direction of the second connecting seat 18. The locking pin 28 fits into the first locking groove 29 or the second locking groove 30 to lock the stroller in the unfolded state. When the slider 27 is mounted between the base 16 and the second connecting seat 18 and the locking pin 28 is inserted into the first locking groove 29, the locking mechanism locks the stroller in the forward use and unfolded state as shown in FIG. 1, and when the locking pin 28 is inserted into the second locking groove 30, the locking mechanism locks the stroller in the reverse use and unfolded state as shown in FIG. 10. The locking mechanism further includes an unlocking key 31 mounted on the putter 1. When the unlocking key 31 is pressed, the locking pin 28 can be separated from the first locking groove 29 or the second locking groove 30. Specifically, for example, a towing rope is provided between the unlocking key 31 and the slider 27 or the locking pin 28, and an elastic device is provided between the slider 27 or the locking pin 28 and the base 16 for inserting and joining the locking pin 28 into the first locking groove 29 or the second locking groove 30.

[0037] In order to more reliably lock the stroller frame 100 in the unfolded state, a slider 27 and a lock pin 28 (not shown) may be provided between the base 16 and the first connecting seat 17, and a first lock groove 29 and a second lock groove 30 may be symmetrically provided in sequence in the circumferential direction of the first connecting seat 17.

[0038] The operating principle of this stroller is as follows: 1 to 3, the stroller is in an unfolded state, and the putter 1 is in a forward use state. The putter 1, the front bracket 2, and the rear bracket 3 are unfolded opposite each other. The putter 1 is arranged to extend diagonally from bottom to top in the front-to-back direction of the stroller. The second rotating shaft 7 is located at the first end M of the first limit slot 14 and the second end N of the second limit slot 15, respectively, and the three are abutted. The first pin roll 8 is located at the intersection of the first chute 10 and the first retraction groove 12, i.e., the first pin roll 8 is located at the first intersection P, and the second pin roll 9 is located in the second retraction groove 13. As shown in FIGS. 1 to 2 and 22 to 23, the first retraction groove 12 and the second retraction groove 13 are at least partially overlapping, and the centers of the base 16, the first connecting sheet 17, and the second connecting sheet 18 are roughly overlapping.

[0039] When the stroller needs to be folded, the locking mechanism is unlocked, the putter 1 is pushed down, and the putter 1 is driven to rotate around the second rotating shaft 7 and approach the rear bracket 3. Referring to FIGS. 4 to 6, during the rotation, the second rotating shaft 7 slides through the first limit slot 14 along the length of the first limit slot 14, and the second rotating shaft 7 always abuts against the second end N of the second limit slot 15. The first pin roll 8 slides downward from the position of the first intersection P into the first chute 10 and simultaneously abuts against the side wall of the first chute 10. As a result of these relative rotations, the first connecting sheet 17 is driven to rotate relative to the second connecting sheet 18 around the first rotating shaft 6, i.e., the front bracket 2 is driven to rotate and approach the rear bracket 3 around the first rotating shaft 6, causing the second pin roll 9 to slide in the second retraction groove 13 along the length of the second retraction groove 13, i.e., when the putter 1 rotates and approaches the rear bracket 3, the front bracket 2 is interlocked with the rear bracket 3 to rotate and approach, and finally the folding is completed. After folding is complete, referring to Figures 7 to 9, the stroller is in the first folded state, with the putter 1 and rear bracket 3 located at the rear of the front bracket 2 in the front-rear direction, and the putter 1 located behind the rear bracket 3. As shown in Figures 7 to 8 and 24 to 25, the center of the base 16 and the center of the second connecting seat 18 are roughly overlapping, and the center of the first connecting seat 17 is not aligned with the centers of the base 16 and the second connecting seat 18. To unfold, the opposite operation is performed, i.e., the putter 1 is rotated upward relative to the rear bracket 3 to unfold, and the front bracket 2 is rotated relative to the rear bracket 3 to unfold until the stroller is fully unfolded, after which the locking mechanism is locked and unfolding is completed. Operation is simple and easy.

[0040] When the stroller is in an unfolded state and the putter 1 needs to be changed in direction, for example, to change the putter 1 from forward use to reverse use, the locking mechanism is unlocked and the putter 1 is rotated around the second rotating shaft 7 in a direction approaching the front bracket 2 of the stroller. During the rotation, the second rotating shaft 7 is always positioned at the first end M of the first limit slot 14 and the second end N of the second limit slot 15, and the three are abutted against each other, and the first pin roll 8 is positioned in the first retraction groove. 12, and the second pin roll 9 rotates through the second evacuation groove 13 to the intersection of the second evacuation groove 13 and the second chute 11; that is, the second pin roll 9 rotates to the position of the second intersection Q, locks the locking mechanism, and the direction change of the putter 1 is completed. In this state, as shown in Figures 10 to 12 and Figures 34 to 35, the first evacuation groove 12 and the second evacuation groove 13 still at least partially overlap, and the centers of the base 16, the first connecting sheet 17, and the second connecting sheet 18 are roughly overlapped.

[0041] When the stroller needs to be folded while the putter 1 is used in the reverse direction, the locking mechanism is unlocked, the putter 1 is pushed down, and the putter 1 is driven to rotate around the second rotating shaft 7 and approach the front bracket 2. Referring to Figures 13 to 15, during the rotation, the second rotating shaft 7 slides through the second limit slot 15 along the length direction of the second limit slot 15, and the second rotating shaft 7 always abuts against the first end M of the first limit slot 14. The second pin roll 9 slides downward from the position of the second intersection Q into the second chute 11. Then, the second connecting sheet 18 comes into contact with the side wall of the second chute 11 and rotates relative to it, driving the second connecting sheet 18 to rotate relative to the first connecting sheet 17 around the first rotating shaft 6, i.e., the rear bracket 3 rotates and approaches the front bracket 2 around the first rotating shaft 6, and the first pin roll 8 slides in the first retraction groove 12 along the length of the first retraction groove 12, i.e., the putter 1 rotates and approaches the front bracket 2, which in turn causes the rear bracket 3 to rotate and approach the front bracket 2, and finally completes folding. 16 to 18, after folding is complete, the stroller is in the second folding state, with the putter 1 and front bracket 2 located in front of the rear bracket 3 in the fore-and-aft direction, and the putter 1 located in front of the front bracket 2. As shown in FIGS. 16 to 17 and 36 to 37, the center of the base 16 and the center of the first connecting sheet 17 are roughly overlapping, and the center of the second connecting sheet 18 is not aligned with the centers of the base 16 and the first connecting sheet 17. To unfold, the opposite operation is performed, that is, the putter 1 is rotated upward relative to the front bracket 2 to unfold, and the rear bracket 3 is rotated relative to the front bracket 2 to unfold until the stroller is fully unfolded, after which the locking mechanism is locked and unfolding is completed. Operation is simple and easy.

[0042] 22 to 37, a seat pack frame 200 can be further attached to this stroller, and the seat pack frame 200 can be folded and unfolded. The seat pack frame 200 can be attached in the forward direction or the reverse direction. Whether the seat pack frame 200 is attached in the forward direction or the reverse direction, the position of the stroller can be changed and the stroller can be folded, and the folding of the stroller is not affected by the seat pack frame 200.

[0043] In this example, the seat pack frame 200 is inserted and joined between the front brackets 2 on both sides, and the stroller frame 100 further includes a first horizontal bar 19 whose both ends are connected to the lower parts of the front brackets 2 on both sides, and a second horizontal bar 20 whose both ends are connected to the lower parts of the rear brackets 3 on both sides, and the first horizontal bar 19 and the second horizontal bar 20 are each rigid horizontal bars.

[0044] In this example, the seat pack frame 200 includes mounting portions 21 for mounting to the side stands on each side, a seat panel 22 having both ends connected to the mounting portions 21 on both sides, a support plate 23 having one end connected to one side of the seat panel 22, a grab rail 24 having both ends connected to the mounting portions 21 on both sides, a backrest rod 25 having both ends connected to the mounting portions 21 on both sides, and a support rod 26 having both ends connected to the backrest rod 25, and the grab rail 24, the backrest rod 25 and the support rod 26 are each U-shaped rods.

[0045] Specifically, referring to Figures 22 and 23, the putter 1 is used in the forward direction, the seat pack frame 200 is attached in the forward direction, and as shown in Figure 22, the grab rail 24 is located in front of the backrest rod 25, the support plate 23 is located in front of the seat plate 22, the backrest rod 25 extends from bottom to top in the front-to-back direction of the stroller, and the support rod 26 is connected to the lower part of the backrest rod 25.

[0046] When folding is required, the stroller frame 100 is unlocked, the putter 1 is pushed down, and the putter 1 is rotated and moved closer to the rear bracket 3, and the front bracket 2 is rotated and moved closer to the rear bracket 3. Finally, when the folding of the stroller frame 100 is completed, the backrest rod 25 of the seat pack frame 200 is folded back in the direction approaching the front bracket 2, and the seat plate 22 approaches the putter 1, the grab rail 24 approaches the seat plate 22, and the backrest rod 25 is folded back to the grab rail. As shown in Figures 24 and 25, when the stroller is folded and approaches the rail 24, the putter 1, front bracket 2 and rear bracket 3 are close to each other, and the front bracket 2, rear bracket 3 and putter 1 are arranged in sequence, the backrest rod 25, grab rail 24 and seat plate 22 are close to each other, and the backrest rod 25, grab rail 24 and seat plate 22 are arranged in sequence, and the folded seat pack frame 200 and stroller frame 100 are close to each other, and the backrest rod 25 is arranged close to the front bracket 2 and away from the putter 1.

[0047] 26 to 27, when the putter 1 is used in the reverse direction and the seat pack frame 200 is attached in the forward direction, if folding is required, the stroller frame 100 is unlocked, the putter 1 is pushed down, and the putter 1 is rotated relative to the front bracket 2, and the rear bracket 3 is rotated toward the front bracket 2 in conjunction with the front bracket 2. Finally, when the stroller frame 100 is completely folded, the backrest rod 25 of the seat pack frame 200 is folded back in the direction approaching the front bracket 2, and the seat pack frame 200 is folded. As shown in Figures 28 and 29, in the folded stroller, the putter 1, front bracket 2 and rear bracket 3 are close to each other, and the putter 1, front bracket 2 and rear bracket 3 are arranged in sequence, the backrest rod 25, grab rail 24 and seat plate 22 are close to each other, and the backrest rod 25, grab rail 24 and seat plate 22 are arranged in sequence, the folded seat pack frame 200 and stroller frame 100 are close to each other, and the backrest rod 25 is arranged close to the putter 1 and away from the rear bracket 3.

[0048] 30 to 31, when the putter 1 is used in the forward direction and the seat pack frame 200 is attached in the reverse direction, as shown in FIG. 30, the grab rail 24 is located behind the backrest rod 25, the support plate 23 is located behind the seat plate 22, and the backrest rod 25 extends from top to bottom in the front-to-rear direction of the stroller.

[0049] When folding is required, the stroller frame 100 is unlocked, the putter 1 is pushed down, and the putter 1 is rotated and moved closer to the rear bracket 3, and the front bracket 2 is rotated and moved closer to the rear bracket 3. Finally, when the folding of the stroller frame 100 is completed, the backrest rod 25 of the seat pack frame 200 is folded back in the direction approaching the front bracket 2, and the seat pack frame 200 is folded. The folded stroller is shown in FIG. As shown in FIG. 3, the putter 1, the front bracket 2 and the rear bracket 3 are close to each other, and the front bracket 2, the rear bracket 3 and the putter 1 are arranged in sequence, the backrest rod 25, the grab rail 24 and the seat plate 22 are close to each other, and the seat plate 22, the grab rail 24 and the backrest rod 25 are arranged in sequence, the folded seat pack frame 200 and the stroller frame 100 are close to each other, and the backrest rod 25 is arranged close to the putter 1 and away from the front bracket 2.

[0050] 34 to 35, when the putter 1 is used in the reverse direction and the seat pack frame 200 is attached in the reverse direction and needs to be folded, the stroller frame 100 is unlocked, the putter 1 is pushed down, and the putter 1 is rotated and moved closer to the front bracket 2, and the rear bracket 3 is rotated and moved closer to the front bracket 2. Finally, when the stroller frame 100 is completely folded, the backrest rod 25 of the seat pack frame 200 is folded back in the direction approaching the front bracket 2, and the seat pack frame 20 is folded back. 36 to 37, the stroller is folded in such a manner that the putter 1, front bracket 2 and rear bracket 3 are close to each other, and the putter 1, front bracket 2 and rear bracket 3 are arranged in sequence, the backrest rod 25, grab rail 24 and seat plate 22 are close to each other, and the seat plate 22, grab rail 24 and backrest rod 25 are arranged in sequence, the folded seat pack frame 200 and stroller frame 100 are close to each other, and the backrest rod 25 is arranged close to the rear bracket 3 and away from the putter 1.

[0051] In short, with the above configuration, the stroller can be folded and unfolded in conjunction with each other when using the putter 1 in the forward or reverse direction, and can be pushed when using the putter 1 in the forward or reverse direction. The seat pack frame 200 is assembled to the stroller frame 100, and the seat pack frame 200 can also be attached in the forward or reverse direction, and when folding the stroller frame 100, the seat pack frame 200 can be attached in the forward or reverse direction, without affecting the folding of the stroller frame 100.

[0052] In addition, the rotary joint provided by the present invention can be used not only for the rotary connection of each rod in the stroller frame 100, but also for the rotary connection of multiple rods in products such as a child seat pack, a child bed, or a rocking chair, so as to adjust the operating position of a certain rod in these products to obtain different usage functions.

[0053] The above examples are merely for the purpose of illustrating the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand and practice the contents of the present invention, but are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made substantially in accordance with the idea of ​​the present invention shall be included in the scope of protection of the present invention. [Explanation of symbols]

[0054] 100. Stroller frame 200, seat pack frame 1. Putter 2. Front bracket 3. Rear bracket 4. Front wheel assembly 5. Rear wheel assembly 6. First rotating shaft 7. Second rotating shaft 8. First pin roll 9. Second pin roll 10. First shot 11. Second shot 12. First evacuation trench 13. Second evacuation trench 14. First Limit Slot 15. Second Limit Slot 16. Bass 17. First connecting seat 18. Second connecting seat 19. First horizontal bar 20, second horizontal bar 21, mounting part 22, seat board 23, support plate 24. Grab rail 25. Backrest rod 26. Support rod 27. Slider 28. Lock pin 29. First lock groove 30, second lock groove 31. Unlock key P, first intersection Q, second intersection M, first end N, second end

Claims

1. A rotary joint including a base, a first connecting seat, and a second connecting seat, the first connecting seat and the second connecting seat are rotatably connected via a first rotating shaft, a second rotating shaft is further provided between the first connecting seat, the second connecting seat, and the base, an axis of the first rotating shaft and an axis of the second rotating shaft are provided in parallel, a first interlocking means is provided between the first connecting seat and the base, and a second interlocking means is provided between the second connecting seat and the base, the first interlocking means interlocking the first connecting seat to rotate about the first rotating shaft relative to the second connecting seat in a second direction opposite to the first direction when the base rotates about the second rotating shaft relative to the first connecting seat in the second direction, and the second interlocking means interlocking the second connecting seat to rotate about the first rotating shaft relative to the first connecting seat in the first direction. A rotating joint characterized by:

2. the first interlocking means includes a first pin roll provided on the base and a first chute opened in the first connecting sheet, the first pin roll is inserted by sliding and turning through the first chute, and the axis of the first pin roll is parallel to the axis of the first rotating shaft or the axis of the second rotating shaft; and / or the second interlocking means includes a second pin roll provided on the base and a second chute opened in the second connecting sheet, the second pin roll is inserted by sliding and turning through the second chute, and the axis of the second pin roll is parallel to the axis of the first rotating shaft or the axis of the second rotating shaft.

2. A rotary joint according to claim 1.

3. The first pin roll is fixedly installed on the base, and a first retraction groove is formed in the first connecting sheet in the rotational extension direction of the first pin roll corresponding to the position of the first pin roll, and one end of the first retraction groove is connected to one end of the first chute; and / or the second pin roll is fixedly installed on the base, and a second retraction groove is formed in the second connecting sheet in the rotational extension direction of the second pin roll corresponding to the position of the second pin roll, and one end of the second retraction groove is connected to one end of the second chute.

3. A rotary joint according to claim 2.

4. the first retraction groove and the second retraction groove are each located above the first rotary shaft; 4. A rotary joint according to claim 3.

5. When the base rotates relative to the second connecting sheet, the first pin roll drives the first connecting sheet to rotate relative to the second connecting sheet by sliding and rotating the first chute relative to the first connecting sheet, and the second pin roll slides in the second retraction groove along the length direction of the second retraction groove, and when the base rotates relative to the first connecting sheet, the second pin roll drives the second connecting sheet to rotate relative to the first connecting sheet by sliding and rotating the second chute relative to the first connecting sheet, and the first pin roll slides in the first retraction groove along the length direction of the first retraction groove.

4. A rotary joint according to claim 3.

6. the first pin roll and the second pin roll are located on both sides of the second rotating shaft, and the first pin roll and the second pin roll are located on both sides of a base rod, and / or the first chute and the second chute are located above the first rotating shaft; 3. A rotary joint according to claim 2.

7. In a plane perpendicular to the axial extension direction of the first rotating shaft, the center of the first pin roll, the center of the second rotating shaft, and the center of the second pin roll are located on the same straight line.

3. A rotary joint according to claim 2.

8. The second rotating shaft penetrates and is fixed to the base.

2. A rotary joint according to claim 1.

9. The first connecting seat, the base, and the second connecting seat are provided in this order in the axial extension direction of the first rotating shaft.

2. A rotary joint according to claim 1.

10. The first rotating shaft is located below the second rotating shaft.

2. A rotary joint according to claim 1.

11. the second rotating shaft is fixedly installed on the base; a first arc-shaped limit slot is formed in the first connecting seat corresponding to the position of the second rotating shaft, the limit slot having a circular center at the shaft center of the first rotating shaft; a second arc-shaped limit slot is formed in the second connecting seat corresponding to the position of the second rotating shaft, the second limit slot having a circular center at the shaft center of the first rotating shaft; when the base rotates relative to the second connecting seat, the second rotating shaft slides in the first limit slot along the length of the first limit slot, and the second rotating shaft always abuts against one end of the second limit slot; when the base rotates relative to the first connecting seat, the second rotating shaft slides in the second limit slot along the length of the second limit slot, and the second rotating shaft always abuts against one end of the first limit slot. A revolute joint according to any one of claims 1 to 10.

12. the first limit slot and the second limit slot are each located above the first rotating shaft; 12. A revolute joint according to claim 11.

13. A stroller comprising: a stroller frame having a folded and unfolded state; a front wheel assembly provided at a bottom front portion of the stroller frame; and a rear wheel assembly provided at a bottom rear portion of the stroller frame, the stroller frame including a putter, a front bracket at the bottom of which the front wheel assembly is provided, and a rear bracket at the bottom of which the rear wheel assembly is provided; The putter, the front bracket, and the rear bracket are connected via a rotary joint according to any one of claims 1 to 10, a base is provided at a lower part of the putter, a first connecting seat is provided at an upper part of the front bracket, and a second connecting seat is provided at an upper part of the rear bracket. A stroller characterized by:

14. The putter has a forward use state and a backward use state, the stroller frame has a first folded state after folding the putter from the forward use state and a second folded state after folding the putter from the backward use state, the stroller frame drives the putter to rotate and approach the rear bracket when the putter is folded from the forward use state, and rotates the base with respect to the second connecting seat, the first interlocking means interlocks the first connecting seat to rotate with respect to the second connecting seat, and further rotates the front bracket with respect to the rear bracket and approaches the When the stroller frame is in the first folded state, the putter and the rear bracket are located on the rear side of the front bracket in the front-to-rear direction, and when the stroller frame is folded from the reverse use state of the putter, the stroller frame drives the putter to rotate and approach the front bracket, and the second interlocking means interlocks the second connecting seat to rotate with respect to the first connecting seat and further rotates the rear bracket and approaches the front bracket, and when the stroller frame is in the second folded state, the putter and the front bracket are located on the front side of the rear bracket in the front-to-rear direction.

14. The stroller according to claim 13.

15. The first connecting seat, the base, and the second connecting seat are provided in this order in the left-right direction of the stroller.

14. The stroller according to claim 13.

16. A child's product including a base rod, a first bracket rod, and a second bracket rod, The base rod, the first bracket rod, and the second bracket rod are connected via a rotary joint according to any one of claims 1 to 10, and a base is provided on any one of the three rods, i.e., the base rod, the first bracket rod, and the second bracket rod, and the first connecting seat is provided on any one of the remaining two rods excluding the one rod from the three rods, and the second connecting seat is provided on the other of the remaining two rods, and the rod provided with the base is located between the rod provided with the first connecting seat and the rod provided with the second connecting seat. A product for children characterized by:

17. The base rod is provided with the base, the first bracket rod is provided with the first connecting seat, and the second bracket rod is provided with the second connecting seat, and the first bracket rod and the second bracket rod are located on opposite sides of the base rod, respectively.

17. The children's product of claim 16.

18. The children's product is a stroller, a children's seat pack, a children's bed or a rocking chair.

17. The children's product of claim 16.

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