Backrest adjusting mechanism and children product

Abstract

The utility model discloses a backrest adjusting mechanism and children's product, backrest adjusting mechanism includes adjusting band and adjusting buckle, adjusting band includes band body and set up the positioning portion on the band body, the positioning portion includes the protruding portion that protrudes from band body towards the thickness direction of band body, and the protruding portion is located in the band body. The convex parts are arranged on the two opposite sides of the belt body in the thickness direction; the adjusting buckle comprises a lock catch seat and a lock block movably arranged on the lock catch seat, the lock block is movably arranged at a locking position and an unlocking position, a first gap channel is formed between the lock catch seat and the lock block at the locking position, and a second gap channel is formed between the lock catch seat and the lock block at the unlocking position; and the positioning part is arranged to limit passing through the first gap channel and is arranged to be capable of passing through the second gap channel. According to the backrest adjusting mechanism, the backrest can be quickly positioned to a required gear position, and the use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's products technical field, concretely relates to a backrest adjusting mechanism and children's products. BACKGROUND

[0002] The seat mechanism on the child seat or the child stroller generally comprises a seat and a backrest, in order to improve the comfort of the child stroller or the child seat when in use, the backrest is generally rotatable to adjust the angle between the backrest and the seat, so as to adjust the use posture of the seat mechanism or the child seat, such as making the seat mechanism or the child seat in a sitting posture, a semi-laying or laying posture use state.

[0003] The angle of the backrest is generally adjusted through a backrest adjusting mechanism. For example, a backrest stepless single-hand adjusting mechanism is disclosed in Chinese patent CN12766432U, which comprises a stepless adjusting buckle and an adjusting belt, etc. The stepless adjusting buckle is internally provided with two one-way belt-out clamping tooth channels, and a press cover for unlocking and realizing the two-way belt-out of the clamping tooth channels. The two ends of the adjusting belt are respectively threaded through the two clamping tooth channels, and then pass through the two sides of the backrest and movably support the backrest. The middle part of the adjusting belt is a pulling part exposed on the stepless adjusting buckle. When the pulling part is lifted upwards, it will automatically abut against the stepless adjusting buckle, and then be pulled out through the two clamping tooth channels in one direction to be elongated, so as to synchronously drive the backrest to rise, and when the stepless adjusting buckle is pulled downwards, it can synchronously drive the backrest to descend. This way of adjusting the angle of the backrest cannot quickly position the backrest to the gear position required for the child stroller to be in a sitting posture, a semi-laying or laying posture use state, so that the child stroller cannot be used in different postures. SUMMARY

[0004] The utility model aims at the deficiency in the prior art, and provides a backrest adjusting mechanism capable of quickly positioning the backrest to the required gear position.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] A backrest adjusting mechanism, comprising:

[0007] An adjusting belt, comprising a belt body and a positioning part provided on the belt body, wherein the positioning part comprises a protruding part protruding from the belt body towards the thickness direction of the belt body, and the belt body is provided with the protruding part on both sides in the thickness direction;

[0008] An adjusting buckle, comprising a lock buckle seat and a lock block movably arranged on the lock buckle seat, wherein the lock block is movably arranged on a locking position and an unlocking position, a first gap channel is formed between the lock buckle seat and the lock block when the lock block is on the locking position, a second gap channel is formed between the lock buckle seat and the lock block when the lock block is on the unlocking position, and the positioning part is arranged to limit the passage through the first gap channel and arranged to be capable of passing through the second gap channel.

[0009] In some embodiments, the two protrusions of the positioning part are a first protrusion protruding towards the direction of the lock block and a second protrusion protruding towards the direction of the lock seat, and the positions of the centers of the first protrusion and the second protrusion in the length direction of the belt body are opposite.

[0010] In some embodiments, the maximum thickness of the first protrusion in the thickness direction of the belt body is greater than the maximum thickness of the second protrusion in the thickness direction of the belt body.

[0011] In some embodiments, the first protrusion and the second protrusion are respectively arranged and formed in a columnar shape along the width direction of the belt body, and the cross sections of the first protrusion and the second protrusion are both circular arc shapes, and the cross section diameter of the first protrusion is greater than the cross section diameter of the second protrusion.

[0012] In some embodiments, the protrusions are formed by sewing a woven line on the belt body.

[0013] In some embodiments, a plurality of the positioning parts are arranged along the length direction of the belt body to form different adjustment gears.

[0014] In some embodiments, the adjustment buckle further comprises an unlocking mechanism, the unlocking mechanism comprises an unlocking piece slidably arranged in the lock seat, the unlocking piece is arranged on the opposite sides of the lock block respectively, and the unlocking pieces on the two sides are both in abutting engagement with the lock block.

[0015] In some embodiments, the unlocking pieces are symmetrically arranged on the opposite sides of the lock block.

[0016] The unlocking piece on each side is provided with a first inclined surface, and the opposite sides of the lock block are respectively provided with a second inclined surface, and the first inclined surface on each side is in abutting engagement with the second inclined surface on the corresponding side.

[0017] In some embodiments, the adjustment buckle further comprises a reset piece, one end of the reset piece is arranged on the lock block, and the other end of the reset piece is arranged on the lock seat.

[0018] The utility model further provides a children's product, the children's product has the backrest adjustment mechanism as any one of the above.

[0019] By means of the technical scheme, the backrest adjusting mechanism has the following advantages compared with the prior art: in the backrest adjusting mechanism, the gear position of the backrest is defined by the positioning parts, the backrest cannot be fixed at other positions except the required gear position, and when the backrest is converted between the gear positions, the adjusting buckle is only needed to be unlocked, so that the backrest can be quickly positioned at the required gear position, thereby facilitating use. BRIEF DESCRIPTION OF DRAWINGS

[0020] FIG. 1 is a perspective view of a backrest adjusting mechanism according to the present embodiment; Figure 1 FIG. 2 is a front view of the backrest adjusting mechanism according to the present embodiment;

[0021] FIG. 3 is a sectional view of the backrest adjusting mechanism along line A-A according to the present embodiment; Figure 2 FIG. 4 is an enlarged view of part A of the backrest adjusting mechanism according to the present embodiment;

[0022] FIG. 5 is a sectional view of the backrest adjusting mechanism along line B-B according to the present embodiment; Figure 3 FIG. 6 is a perspective view of an adjusting buckle according to the present embodiment; Figure 2 FIG. 7 is an exploded view of the adjusting buckle according to the present embodiment;

[0023] FIG. 8 is a perspective view of a child stroller according to the present embodiment; Figure 4 FIG. 9 is a side view of the child stroller according to the present embodiment. Figure 3 FIG. 10 is a sectional view of the child stroller along line C-C according to the present embodiment.

[0024] FIG. 11 is a sectional view of the child stroller along line D-D according to the present embodiment. Figure 5 FIG. 12 is a sectional view of the child stroller along line E-E according to the present embodiment. Figure 2 FIG. 13 is a sectional view of the child stroller along line F-F according to the present embodiment.

[0025] FIG. 14 is a sectional view of the child stroller along line G-G according to the present embodiment. Figure 6 FIG. 15 is a sectional view of the child stroller along line H-H according to the present embodiment.

[0026] FIG. 16 is a sectional view of the child stroller along line I-I according to the present embodiment. Figure 7 FIG. 17 is a sectional view of the child stroller along line J-J according to the present embodiment.

[0027] FIG. 18 is a sectional view of the child stroller along line K-K according to the present embodiment. Figure 8 FIG. 19 is a sectional view of the child stroller along line L-L according to the present embodiment.

[0028] FIG. 20 is a sectional view of the child stroller along line M-M according to the present embodiment. Figure 9 FIG. 21 is a sectional view of the child stroller along line N-N according to the present embodiment.

[0029] 1, adjusting buckle; 11, lock buckle seat; 111, second hook part; 12, lock block; 121, second inclined surface; 13, unlocking piece; 131, first inclined surface; 132, first hook part; 14, reset piece; 2, adjusting belt; 21, belt body; 22, positioning part; 221, first convex part; 222, second convex part; 300, seat; 400, backrest; 500, stroller frame. DETAILED DESCRIPTION

[0030] The technical scheme of the present utility model will be further described below in combination with the drawings and specific embodiments.

[0031] In the following description, the terms "front", "back", "left", "right", "up" and "down" and the like in the description refer to the Figure 2 , the left direction in the figure is "left", the right direction is "right", the upper side direction is "up", and the lower side direction is "down". The vertical direction of the paper in the figure is "front" and "back". The above definitions of directions are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] The child product comprises a seat assembly, the seat assembly comprising a seat 300 and a backrest 400, the backrest 400 being rotatably arranged on the seat 300, and the backrest 400 being rotatable to different gear positions by rotating the backrest 400 relative to the seat 300. A backrest adjusting mechanism is arranged on the backrest 400, and the backrest 400 is positioned at different gear positions by the backrest adjusting mechanism. As shown in Figure 8 and Figure 9 , the child product of the embodiment can be a child stroller, and the child stroller further comprises a stroller frame 500, and the seat 300 is arranged on the stroller frame 500.

[0033] As shown in Figures 1-5 , the backrest adjusting mechanism of the utility model comprises an adjusting buckle 1 and an adjusting belt 2. The adjusting buckle 1 is arranged at the back of the backrest 400, and the adjusting belt 2 is arranged on both sides of the backrest 400. One end of each side of the adjusting belt 2 is fixedly arranged on the stroller frame 500, and the adjusting belts 2 on both sides extend from both sides of the backrest 400 to the back of the backrest 400 and pass out of the adjusting buckle 1, and the backrest 400 is driven to rotate relative to the seat 300 by sliding the adjusting belt 2 relative to the adjusting buckle 1.

[0034] As shown in Figures 1-7 , the adjusting buckle 1 comprises a lock buckle seat 11 and a lock block 12, the lock buckle seat 11 has a hollow cavity, and the lock block 12 is movably arranged in the hollow cavity of the lock buckle seat 11, and the lock block 12 is movably arranged in a locked position and an unlocked position. In this embodiment, the lock block 12 is slidably arranged in the hollow cavity of the lock buckle seat 11. When the lock block 12 is in the locked position and the unlocked position, a passage is formed between the opposite two side walls of the lock buckle seat 11 and the corresponding two sides of the lock block 12, and the adjusting belt 2 on each side is slidably arranged in the corresponding passage.

[0035] The adjusting belt 2 comprises a belt body 21 and a positioning portion 22 arranged on the belt body 21. The width of the passage formed between the lock buckle seat 11 and the lock block 12 is not less than the thickness of the belt body 21, so that the belt body 21 is always arranged in the passage. The positioning portion 22 comprises a protrusion formed in the thickness direction of the belt body 21, and the protrusion is arranged on both sides of the belt body 21 in the thickness direction.

[0036] The adjustment buckle 1 has a locked state and an unlocked state:

[0037] When the adjustment buckle 1 is in the locked state, the lock block 12 is in the locked position, and the channel formed between the lock block 12 and the lock block seat 11 is a first gap channel, the width of the first gap channel being smaller than the thickness of the adjustment band 2 at the positioning portion 22. In this way, when the position of the positioning portion 22 is located at the entrance of the channel when the adjustment band 2 slides relative to the adjustment buckle 1 to the position of the positioning portion 22, the position of the positioning portion 22 cannot enter the channel, and the adjustment band 2 cannot continue to slide relative to the adjustment buckle 1 in the current direction. When the rear part of the backrest 400 is not supported, the backrest 400 rotates downward relative to the seat 300 under the action of its own gravity when the child stroller is in use, and when the positioning portion 22 is located at the entrance of the rear end of the channel, the backrest 400 is positioned at the current gear position by the positioning portion 22, as shown in Figure 3 and Figure 4 .

[0038] When the adjustment buckle 1 is in the unlocked state, the lock block 12 is in the unlocked position, and the channel formed between the lock block 12 and the lock block seat 11 is a second gap channel, the width of the second gap channel being greater than the thickness of the adjustment band 2 at the positioning portion 22. In this way, the position of the positioning portion 22 can also enter the channel and slide along the channel, so that the backrest 400 can rotate relative to the seat 300.

[0039] The lock block 12 is converted between the locked position and the unlocked position by sliding the lock block 12 relative to the lock block seat 11, thereby converting the adjustment buckle 1 between the locked state and the unlocked state.

[0040] The positioning portions 22 are spaced apart along the length direction of the band body 21, and when different positioning portions 22 are located at the entrance of the rear end of the channel, the backrest 400 is positioned at different gear positions. For a child stroller, it is preferred that the positioning portions 22 are provided at least three, so that the backrest 400 can be positioned at gear positions for the child stroller to be in a sitting, half-lying or lying use state, respectively.

[0041] The convex portions are respectively arranged on opposite sides in the thickness direction of the band body 21, so that the adjustment buckle 1 can be in a more stable locked state, so that the positioning portion 22 is less likely to enter the channel when the adjustment buckle 1 is in the locked state, so that the backrest 400 is more stably positioned at each gear position, and the safety performance of the child product in use can be improved.

[0042] Specifically, as shown in Figure 3 and Figure 4 , the two convex portions of the positioning portion 22 are respectively a first convex portion 221 protruding toward the lock block seat 11 and a second convex portion 222 protruding toward the lock block 12.

[0043] In this embodiment, the first protrusion 221 and the second protrusion 222 can be the same or different, and the positions of the centers of the first protrusion 221 and the second protrusion 222 in the length direction of the strap body 21 correspond to each other.

[0044] In other embodiments, the positions of the centers of the first protrusion 221 and the second protrusion 222 in the length direction of the strap body 21 can also be offset by a certain distance.

[0045] Preferably, the maximum thickness at the first protrusion 221 of the adjustment strap 2 is greater than the maximum thickness at the second protrusion 222, so that when the adjustment buckle 1 is unlocked from the locked state, the positioning portion 22 has smaller resistance to the sliding of the lock block 12, and the unlocking operation of the adjustment buckle 1 is more labor-saving.

[0046] In this embodiment, the first protrusion 221 and the second protrusion 222 are respectively arranged along the width direction of the strap body 21 and form columns, the cross sections of the first protrusion 221 and the second protrusion 222 are both circular arcs, the centers of the two circular arcs are arranged to coincide with each other, and the cross-sectional diameter of the first protrusion 221 is greater than the cross-sectional diameter of the second protrusion 222.

[0047] In this embodiment, the first protrusion 221 and the second protrusion 222 are both formed by sewing a woven line on the strap body 21, so that the manufacturing process of the adjustment strap 2 is simple and the manufacturing cost is low.

[0048] The adjustment buckle 1 further comprises an unlocking mechanism, and the adjustment buckle 1 is capable of driving the lock block 12 to slide by operating the unlocking mechanism when the adjustment buckle 1 is in the locked state, so that the adjustment buckle 1 is unlocked.

[0049] The unlocking mechanism comprises an unlocking piece 13, and the unlocking piece 13 is slidably arranged in the hollow cavity of the lock buckle seat 11. The unlocking piece 13 is arranged on the opposite sides of the lock block 12, respectively, and the unlocking pieces 13 on the two sides are both in abutting engagement with the lock block 12.

[0050] In this embodiment, the unlocking piece 13 is arranged on the upper and lower sides of the lock buckle seat 11, respectively, and the unlocking pieces 13 on the two sides are both capable of sliding along the upper and lower directions relative to the lock buckle seat 11, and the sliding directions of the two unlocking pieces 13 are opposite. The sliding direction of the lock block 12 is perpendicular to the sliding directions of the unlocking pieces 13.

[0051] Specifically, as shown in Figure 5 each unlocking piece 13 is provided with a first inclined surface 131, and the opposite sides of the lock block 12 are respectively provided with a second inclined surface 121. The first inclined surface 131 on each side is in abutting engagement with the second inclined surface 121 on the corresponding side. When the adjustment buckle 1 is in the locked state, the two unlocking pieces 13 are driven to slide to the inside of the lock buckle seat 11 in the upward or downward direction, which drives the lock block 12 to slide forward relative to the lock buckle seat 11, so that the size of the channel formed between the lock buckle seat 11 and the lock block 12 increases, thereby making the adjustment buckle 1 in the unlocked state.

[0052] Thus, when unlocking the adjustment buckle 1, the unlocking members 13 on both sides operate simultaneously and act on the upper and lower sides of the locking block 12, respectively. This way, the locking block 12 is evenly stressed from top to bottom, and the locking block 12 does not rotate, which would prevent the adjustment buckle 1 from being unlocked. As a result, the locking block 12 can only slide under the interaction of the first inclined surface 131 and the second inclined surface 121, allowing the adjustment buckle 1 to be unlocked smoothly.

[0053] Preferably, the unlocking member 13 is symmetrically arranged on opposite sides of the locking block 12, that is, the first inclined surfaces 131 on both sides are symmetrically arranged, and correspondingly, the second inclined surfaces 121 on both sides of the locking block 12 are also symmetrically arranged, which makes the force on the locking block 12 more uniform when the adjustment buckle 1 is unlocked.

[0054] like Figure 3 、 Figure 4 and Figure 7 As shown, the adjustment buckle 1 further includes a reset member 14, one end of which is disposed on the locking block 12, and the other end of which is disposed on the lock seat 11. In this embodiment, the reset member 14 is an elastic member, and the elastic force of the elastic member is used to drive the locking block 12 to slide backward, thereby automatically resetting the adjustment buckle 1 from the unlocked state to the locked state.

[0055] A first hook 132 is provided on the unlocking members 13 on both sides, and a second hook 111 is provided on the upper and lower sides of the lock seat 11. When the adjustment buckle 1 is reset from the unlocked state to the locked state, the unlocking members 13 on both sides slide toward the outside of the lock seat 11 until the first hook 132 and the second hook 111 are engaged with each other. In this way, the sliding of the unlocking member 13 can be limited to prevent the unlocking member 13 from falling out of the lock seat 11.

[0056] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A backrest adjustment mechanism characterised in that: The adjusting band comprises a band body and a positioning part provided on the band body, the positioning part comprises a protrusion formed from the band body towards the thickness direction of the band body, and the band body is provided with the protrusion on both sides in the thickness direction; The adjusting buckle comprises a lock buckle seat and a lock block movably provided in the lock buckle seat, the lock block is movably provided in a locked position and an unlocked position, in the locked position, a first gap channel is formed between the lock buckle seat and the lock block, in the unlocked position, a second gap channel is formed between the lock buckle seat and the lock block, the positioning part is arranged to limit the passage through the first gap channel and to be capable of passing through the second gap channel. The two protrusions of the positioning part are a first protrusion protruding towards the lock buckle seat and a second protrusion protruding towards the lock block, the centers of the first protrusion and the second protrusion are opposite in the length direction of the band body.

2. The backrest adjustment mechanism of claim 1, wherein: The maximum thickness of the first protrusion in the thickness direction of the band body is greater than the maximum thickness of the second protrusion in the thickness direction of the band body.

3. The backrest adjustment mechanism of claim 2, wherein: The first protrusion and the second protrusion are respectively arranged and formed in a columnar shape along the width direction of the band body, the cross sections of the first protrusion and the second protrusion are both circular arc shapes, and the cross section diameter of the first protrusion is greater than the cross section diameter of the second protrusion.

4. The backrest adjustment mechanism of claim 3, wherein: The protrusion is formed by sewing a woven line on the band body.

5. The backrest adjustment mechanism according to any one of claims 1 to 4, characterized in that: The positioning part is provided with a plurality of positioning parts arranged in the length direction of the band body to form different adjusting gears.

6. The backrest adjustment mechanism according to any one of claims 1 to 4, characterized in that: The adjusting buckle further comprises an unlocking mechanism, the unlocking mechanism comprises an unlocking piece slidably provided in the lock buckle seat, the unlocking piece is respectively provided on the opposite sides of the lock block, and the unlocking pieces on both sides are in abutting engagement with the lock block.

7. The backrest adjustment mechanism of claim 1, wherein: The unlocking pieces are symmetrically provided on the opposite sides of the lock block; 8. The backrest adjustment mechanism of claim 7, wherein: Each side of the unlocking piece is provided with a first inclined surface, and the opposite sides of the lock block are respectively provided with a second inclined surface, and each side of the first inclined surface is in abutting engagement with the corresponding side of the second inclined surface. The adjusting buckle further comprises a reset piece, one end of the reset piece is provided on the lock block, and the other end of the reset piece is provided on the lock buckle seat.

9. The backrest adjustment mechanism of claim 1, wherein: The backrest adjusting mechanism has any one of claims 1-9.

10. A child's article of manufacture, characterized by: ​

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