Backrest angle adjustment mechanism, seat and baby swing

Abstract

The present application relates to the technical field of baby swings, and particularly relates to a backrest angle adjusting mechanism, a seat and a baby swing. The backrest angle adjusting mechanism comprises a front wall pipe, a rear wall pipe, a first pivot as a rotation center, a first clamping groove and a second clamping groove, a sliding groove, a clamping block, a first abutting portion, a first stop portion, a second abutting portion and a second stop portion. The rear wall pipe is rotatable relative to the front wall pipe. The sliding groove is axially arranged on the rear wall pipe. The clamping block is slidably arranged in the sliding groove. The clamping block is selectively clamped with any one of the first clamping groove and the second clamping groove. The first abutting portion is arranged at the end of the rear wall pipe. The first stop portion is arranged on the front wall pipe to stop the first abutting portion. The second abutting portion is arranged at the end of the front wall pipe. The second stop portion is arranged on the rear wall pipe to stop the second abutting portion. The backrest angle adjusting mechanism can adjust the angle between the rear wall pipe and the front wall pipe, and can ensure the connection strength between the rear wall pipe and the front wall pipe.

Description

Technical Field

[0001] This invention relates to the field of infant swing technology, specifically to a backrest angle adjustment mechanism, a seat, and an infant swing. Background Technology

[0002] An infant swing is a product that provides entertainment or comfort to infants and toddlers by rocking them.

[0003] In order to ensure the overall structural strength between the rear and front tubes of existing infant swings, the rear and front tubes of the seat are usually fixedly connected, and the angle between the rear and front tubes cannot be adjusted. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the rear and front tubes of the existing infant swing seat cannot be adjusted in angle, thereby providing a back angle adjustment mechanism that allows for angle adjustment between the rear and front tubes while ensuring the connection strength between the rear and front tubes.

[0005] Another technical problem that this invention aims to solve is to overcome the defect that the rear and front tubes of existing infant swing seats cannot be adjusted in angle, thereby providing a seat in which the rear and front tubes can be adjusted in angle while ensuring the connection strength between the rear and front tubes.

[0006] To solve the above-mentioned technical problems, the present invention provides a backrest angle adjustment mechanism, comprising:

[0007] Front apron;

[0008] The rear tube rotates relative to the front tube with the first pivot as the center of rotation.

[0009] The front tube is provided with a first snap-fit ​​groove and a second snap-fit ​​groove at one end along the axial direction away from the first rotating shaft.

[0010] A sliding groove is provided on the rear tube along the axial direction, and a snap-fit ​​block is slidably disposed in the sliding groove. The snap-fit ​​block is adapted to selectively snap-fit ​​with either the first snap-fit ​​groove or the second snap-fit ​​groove.

[0011] The rear tube has a first abutting part at its end, and the front tube has a first stop part, which is adapted to stop the first abutting part; the front tube has a second abutting part at its end, and the rear tube has a second stop part, which is adapted to stop the second abutting part.

[0012] When the snap-fit ​​block engages with the first snap-fit ​​groove, the first stop portion stops the first abutting portion, and the rear tube and the front tube are coaxially arranged; when the snap-fit ​​block engages with the second snap-fit ​​groove, the second stop portion stops the second abutting portion, and the rear tube and the front tube are angled.

[0013] Optionally, a spring is also provided in the sliding groove, with one axial end of the spring abutting against the snap-fit ​​block. The spring is adapted to keep the snap-fit ​​block always snapped into the first snap-fit ​​groove or the second snap-fit ​​groove.

[0014] Optionally, the backrest angle adjustment mechanism further includes:

[0015] The base is fixedly disposed on the side of the rear casing tube that is radially away from the front casing tube;

[0016] A pushing block is axially fixed to the locking block. The pushing block is adapted to move axially relative to the base under the action of an external force, so as to drive the locking block to overcome the resistance of the spring and disengage from the first locking groove or the second locking groove.

[0017] Optionally, a limiting groove is provided on the base, and a buckle is provided on the side of the pushing block near the base. The buckle passes radially through the limiting groove and engages with the side wall of the base away from the buckle, and the buckle is adapted to move axially within the limiting groove.

[0018] Optionally, a first reinforcing member is built into one end of the front tube near the rear tube, the first reinforcing member being adapted to enhance the structural strength of the front tube; a second reinforcing member is built into one end of the rear tube near the front tube, the second reinforcing member being adapted to enhance the structural strength of the rear tube.

[0019] The seat provided by the present invention includes:

[0020] A base, and a backrest angle adjustment mechanism as described above connected to the base;

[0021] A bouncing structure is provided between the base and the front tube. The bouncing structure is made of elastic material and is adapted to overcome the vertical downward pressure of the front tube to push the front tube to bounce along the height direction.

[0022] Optionally, the base includes end frames disposed on both sides of the base along its length; the seat further includes a support leg structure hinged to the end frames, the support leg structure being adapted to rotate relative to the end frames and to form a fixed angle with the end frames.

[0023] The end frame is provided with a third stop portion, and the support leg structure is provided with a third abutment portion. When a fixed angle is formed between the support leg structure and the end frame, the third abutment portion abuts against the third stop portion to stop the support leg structure.

[0024] Optionally, the base also includes an arc-shaped base frame, which is disposed on both sides of the base in the width direction. When the support leg structure is retracted, the arc top of the arc-shaped base frame is adapted to abut against the ground so that the seat can rock on the ground.

[0025] The present invention also provides an infant swing, comprising:

[0026] A vehicle frame, and a seat as described above mounted on the vehicle frame;

[0027] The base also includes a crossbeam, on which a connector is provided, and the connector has a connector groove; the frame includes a rocker arm, on which a connector is provided, and the connector is adapted to be inserted into the connector groove to connect the seat to the frame.

[0028] Optionally, the frame further includes:

[0029] The support head is connected to the rocker arm, and the support head is adapted to drive the rocker arm to swing back and forth.

[0030] A support leg is connected to the support head end, and the support leg is adapted to support the support head end;

[0031] A support arm is disposed between the support head end and the support leg. The support arm has several adjustment holes. A locking block is movably disposed on the support head end. The locking block is adapted to engage with any of the adjustment holes to adjust the height of the support head end relative to the support leg.

[0032] Optionally, the support leg includes a first leg and a second leg; a folding structure is provided on one end of the support arm near the support leg, and the two ends of the folding structure abut against the first leg and the second leg respectively;

[0033] When the retractable structure moves along the width direction, the retractable structure is adapted to simultaneously disengage from the first leg and the second leg so that the first leg and the second leg can retract.

[0034] The technical solution of this invention has the following advantages:

[0035] 1. The backrest angle adjustment mechanism provided by the present invention, during the rotation adjustment process, selectively engages the locking block with either the first locking groove or the second locking groove to prevent the rear tube from rotating relative to the front tube, thereby enhancing the connection strength between the rear tube and the front tube; by providing a first abutting part at the end of the rear tube and a first stop part corresponding to the first abutting part on the front tube, when the locking block engages with the first locking groove, the first abutting part abuts with the first stop part, thereby further enhancing the connection strength between the rear tube and the front tube; by providing a second abutting part at the end of the front tube and a second stop part corresponding to the second abutting part on the rear tube, when the locking block engages with the second locking groove, the second stop part abuts with the second abutting part, thereby further enhancing the connection strength between the rear tube and the front tube, thus ensuring the connection strength between the rear tube and the front tube while realizing the angle adjustment between the rear tube and the front tube.

[0036] 2. The chair provided by the present invention includes a base and a backrest angle adjustment mechanism connected to the base; the end frame is disposed on both sides of the base along its length direction, and the support leg structure is hinged to the end frame. The support leg structure can be retracted into the end frame, at which time the arc apex of the arc-shaped base frame abuts against the ground, thereby allowing the chair to switch to a rocking chair state, and the user can push the chair to rock back and forth; the support leg structure can also be opened to form a fixed angle with the end frame, thereby allowing the chair to switch from the rocking chair state to a stable placement state, enriching the function of the chair and enhancing its applicability. The end frame is provided with a third stop portion, and the support leg structure is provided with a third abutment portion. The third abutment portion abuts against the third stop portion to stop the support leg structure, thereby maintaining the fixed angle formed between the support leg structure and the end frame after it is opened, thus enhancing the stability of the chair. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is an exploded structural diagram of the back angle adjustment mechanism of the present invention;

[0039] Figure 2This is a schematic diagram of the stop principle when the front and rear tubes of the back angle adjustment mechanism of the present invention are coaxially arranged.

[0040] Figure 3 This is a schematic diagram of the stop principle when the front and rear tubes of the back angle adjustment mechanism of the present invention are set at an angle.

[0041] Figure 4 This is an exploded structural diagram of the front casing tube and the first reinforcing member, and the rear casing tube and the second reinforcing member of the back angle adjustment mechanism of the present invention.

[0042] Figure 5 This is a schematic diagram of the overall structure of the seat of the present invention in the state where the support leg structure is retracted;

[0043] Figure 6 This is a schematic diagram of the overall structure of the seat of the present invention with the support leg structure in the open state;

[0044] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0045] Figure 8 This is a schematic diagram illustrating the connection principle between the frame and seat of the infant swing of the present invention.

[0046] Figure 9 This is a schematic diagram of the overall structure of the infant swing of the present invention;

[0047] Figure 10 for Figure 9 Enlarged view of point B in the middle;

[0048] Figure 11 for Figure 9 Enlarged view of point C in the middle;

[0049] Figure 12 for Figure 11 A schematic diagram illustrating the working principle of the folding structure, which is shown behind the hidden support arm.

[0050] Explanation of reference numerals in the attached figures:

[0051] 10. Front tube; 100. First pivot; 101. First snap-fit ​​groove; 102. Second snap-fit ​​groove; 11. First stop part; 12. Second abutment part; 13. First reinforcing member;

[0052] 20. Rear casing tube; 201. Sliding groove; 21. First abutment part; 22. Second stop part; 23. Second reinforcing member;

[0053] 30. Snap-fit ​​block; 31. Spring;

[0054] 40. Base; 401. Limiting groove; 41. Push block; 411. Buckle;

[0055] 50. Base; 51. End frame; 511. Third stop part; 52. Arc-shaped base frame; 53. Crossbeam; 54. Plug-in socket; 540. Plug-in groove;

[0056] 60. Bounce structure;

[0057] 70. Support leg structure; 71. Third abutment part;

[0058] 80. Frame; 81. Rocker arm; 811. Connecting part; 82. Support head end; 821. Locking block; 83. Support leg; 831. First leg; 832. Second leg; 84. Support arm; 840. Adjustment hole; 841. Folding structure; 842. Lock. Detailed Implementation

[0059] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0063] Example 1

[0064] Combination Figures 1-4As shown, the backrest angle adjustment mechanism provided in this embodiment includes:

[0065] Front apron 10;

[0066] The rear tube 20 rotates relative to the front tube 10 with the first rotating shaft 100 as the rotation center;

[0067] The front casing tube 10 is provided with a first snap-fit ​​groove 101 and a second snap-fit ​​groove 102 at one end away from the first rotating shaft 100 along the axial direction.

[0068] The rear tube 20 is provided with a sliding groove 201 along the axial direction. A snap-fit ​​block 30 is slidably disposed in the sliding groove 201. The snap-fit ​​block 30 is adapted to selectively snap-fit ​​with either the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102.

[0069] The rear tube 20 is provided with a first abutting part 21 at its end, and the front tube 10 is provided with a first stop part 11, which is adapted to stop the first abutting part 21; the front tube 10 is provided with a second abutting part 12 at its end, and the rear tube 20 is provided with a second stop part 22, which is adapted to stop the second abutting part 12.

[0070] When the snap-fit ​​block 30 snaps into the first snap-fit ​​groove 101, the first stop part 11 stops the first abutting part 21, and the rear tube 20 and the front tube 10 are coaxially arranged; when the snap-fit ​​block 30 snaps into the second snap-fit ​​groove 102, the second stop part 22 stops the second abutting part 12, and the rear tube 20 and the front tube 10 are arranged at an angle.

[0071] It should be noted that, please refer to Figure 1 As shown, the front tube 10 and the rear tube 20 are hinged together. During adjustment, the rear tube 20 can rotate relative to the front tube 10 with the first pivot 100 as the center of rotation. See also... Figure 1 As shown, the front casing 10 has a first locking groove 101 and a second locking groove 102 at one end axially away from the first rotating shaft 100. The axis of the first locking groove 101 and the axis of the second locking groove 102 intersect the first rotating shaft 100, and the axes of the first locking groove 101 and the second locking groove 102 form an angle α. In specific implementation, the size of the angle α can be adjusted according to the actual usage. It is worth noting that, please refer to... Figure 5As shown, to achieve the design requirements such as the seat's bounce function, the rear tube 20 of this invention is suspended after being connected to the front tube 10. There are no additional support components to reinforce or support the rotatable connection between the rear tube 20 and the front tube 10. This places higher demands on the connection strength between the rear tube 20 and the front tube 10 under rotatable adjustment conditions. (See also...) Figure 1 As shown, a sliding groove 201 is provided axially on the rear tube 20. A locking block 30 is slidably disposed within the sliding groove 201. When the rear tube 20 rotates relative to the front tube 10 by the included angle α about the first rotating shaft 100 as the rotation center, the locking block 30 engages with the first locking groove 101 or the second locking groove 102 to fix the circumferential position of the rear tube 20 relative to the front tube 10, preventing the rear tube 20 from rotating relative to the front tube 10, thereby enhancing the connection strength between the rear tube 20 and the front tube 10. Please refer to [link to relevant documentation]. Figure 2 As shown, the rear tube 20 has a first abutment portion 21 at its end, and the front tube 10 has a first stop portion 11. When the rear tube 20 and the front tube 10 are coaxially arranged, the locking block 30 engages with the first locking groove 101. Simultaneously, the first stop portion 11 stops the first abutment portion 21, thereby further enhancing the connection strength between the rear tube 20 and the front tube 10. Please refer to... Figure 3 As shown, the front tube 10 is provided with a second abutting part 12 at its end, and the rear tube 20 is provided with a second stop part 22. When the rear tube 20 and the front tube 10 form the included angle α, the snap-fit ​​block 30 snaps into the second snap-fit ​​groove 102. At the same time, the second stop part 22 stops the second abutting part 12, thereby further enhancing the connection strength between the rear tube 20 and the front tube 10.

[0072] In this embodiment, the front tube 10 and the rear tube 20 are hinged at the first rotating shaft 100. The rear tube 20 rotates relative to the front tube 10 with the first rotating shaft 100 as its rotation center, thereby achieving rotational adjustment between the rear tube 20 and the front tube 10. A first engaging groove 101 and a second engaging groove 102 are provided at one end of the front tube 10. A sliding groove 201 is provided axially on the rear tube 20. A engaging block 30 is slidably disposed within the sliding groove 201. During rotational adjustment, the engaging block 30 selectively engages with either the first engaging groove 101 or the second engaging groove 102 to prevent the rear tube 20 from rotating relative to the front tube 10, thereby enhancing the connection strength between the rear tube 20 and the front tube 10. A first abutment portion 21 is provided at the end of the rear tube 20. A first stop portion 11 corresponding to the first abutment portion 21 is provided on the front tube 10. When the snap-fit ​​block 30 is snapped into the first snap-fit ​​groove 101, the first stop portion 11 abuts against the first abutment portion 21, thereby further enhancing the connection strength between the rear tube 20 and the front tube 10. A second abutment portion 12 is provided at the end of the front tube 10, and a second stop portion 22 corresponding to the second abutment portion 12 is provided on the rear tube 20. When the snap-fit ​​block 30 is snapped into the second snap-fit ​​groove 102, the second stop portion 22 abuts against the second abutment portion 12, thereby further enhancing the connection strength between the rear tube 20 and the front tube 10. Thus, while realizing the angle adjustment between the rear tube and the front tube, the connection strength between the rear tube and the front tube is guaranteed.

[0073] Specifically, a spring 31 is also provided in the sliding groove 201. One axial end of the spring 31 abuts against the snap-fit ​​block 30. The spring 31 is adapted to keep the snap-fit ​​block 30 always snapped into the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102.

[0074] It should be noted that, please refer to Figure 1 As shown, a spring 31 is also provided in the sliding groove 201. One axial end of the spring 31 abuts against the snap-fit ​​block 30, and the other end abuts against the inner wall of the sliding groove 201. During assembly, the spring 31 can be pre-compressed in the sliding groove 201. By setting the spring 31 to push the snap-fit ​​block 30, the snap-fit ​​block 30 is kept axially inclined towards the first rotating shaft 100, thereby ensuring that the snap-fit ​​block 30 is always in a snap-fit ​​state with the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102, avoiding axial separation of the snap-fit ​​block 30 from the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102, and thus ensuring the connection strength between the rear tube 20 and the front tube 10.

[0075] Specifically, the backrest angle adjustment mechanism further includes:

[0076] The base 40 is fixedly disposed on the side of the rear casing tube 20 that is radially away from the front casing tube 10;

[0077] The push block 41 is axially fixed to the snap-fit ​​block 30. The push block 41 is adapted to move axially relative to the base 40 under the action of external force, so as to drive the snap-fit ​​block 30 to overcome the resistance of the spring 31 and disengage from the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102.

[0078] It should be noted that, please refer to Figure 1 As shown, the base 40 and the push block 41 can be independent push modules. One axial end of the base 40 can be snapped into the rear tube 20, and the other end can be bolted or screwed into the rear tube 20. A slot (not shown in the figure) can be formed on the side of the push block 41 near the snap-fit ​​block 30. The snap-fit ​​block 30 can be inserted into the slot, thereby axially fixing the push block 41 and the snap-fit ​​block 30. During the adjustment process, the user can axially push the push block 41 relative to the base 40 to move it axially, so that the push block 41 can drive the snap-fit ​​block 30 to overcome the resistance of the spring 31 and disengage from the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102. After the angle adjustment between the rear tube 20 and the front tube 10 is completed, the push block 41 can be released, so that the snap-fit ​​block 30 can be snapped into the first snap-fit ​​groove 101 or the second snap-fit ​​groove 102 again under the pushing force of the spring 31, which improves the convenience of adjustment.

[0079] Specifically, a limiting groove 401 is provided on the base 40, and a buckle 411 is provided on the side of the pushing block 41 near the base 40. The buckle 411 passes radially through the limiting groove 401 and is engaged with the side wall of the base 40 away from the buckle 411. The buckle 411 is adapted to move axially within the limiting groove 401.

[0080] It should be noted that, please refer to Figure 1 As shown, a limiting groove 401 is provided on the base 40. The limiting groove 401 is arranged axially, and the axial length of the limiting groove 401 is greater than the axial width of the buckle 411, so that the buckle 411 can move axially along the limiting groove 401. The buckle 411 passes radially through the limiting groove 401 and is engaged with the side wall of the base 40 away from the buckle 411. At the same time, the buckle 411 can also move axially within the limiting groove 401, which improves the convenience of disassembly, assembly and maintenance.

[0081] Specifically, the front tube 10 has a first reinforcing member 13 built into one end near the rear tube 20, the first reinforcing member 13 being adapted to enhance the structural strength of the front tube 10; the rear tube 20 has a second reinforcing member 23 built into one end near the front tube 10, the second reinforcing member 23 being adapted to enhance the structural strength of the rear tube 20.

[0082] It should be noted that, please refer to Figure 4 As shown, a first reinforcing member 13 is built into the end of the front tube 10 near the rear tube 20. The first reinforcing member 13 can be made of stainless steel or other metals. The first reinforcing member 13 can be bolted or screwed to the front tube 10. The first reinforcing member 13 is suitable for enhancing the structural strength of the front tube 10. A second reinforcing member 23 is built into the end of the rear tube 20 near the front tube 10. The second reinforcing member 23 can be made of stainless steel or other metals. The second reinforcing member 23 can be bolted or screwed to the rear tube 20. The second reinforcing member 23 is suitable for enhancing the structural strength of the rear tube 20. In actual use, the first reinforcing member 13 and the second reinforcing member 23 can bear most of the load at the rotatable connection between the front tube 10 and the rear tube 20, thereby enhancing the connection strength between the rear tube 20 and the front tube 10.

[0083] Example 2

[0084] Combination Figures 5-7 As shown, the seat provided in this embodiment includes:

[0085] A base 50, and a backrest angle adjustment mechanism as described above connected to the base 50;

[0086] A bouncing structure 60 is provided between the base 50 and the front tube 10. The bouncing structure 60 is made of elastic material and is adapted to overcome the vertical downward pressure of the front tube 10 to push the front tube 10 to bounce along the height direction.

[0087] It should be noted that, please refer to Figure 5 As shown, the base 50 is connected to the front tube 10 via a spring structure 60. The spring structure 60 is made of an elastic material and can quickly return to its natural shape after being deformed by pressure. The spring structure 60 is adapted to overcome the vertical downward pressure of the front tube 10 to push the front tube 10 to elastically bounce along the height direction, so as to realize the spring function of the seat and enhance the comfort of infants and young children in the seat.

[0088] Specifically, the base 50 includes an end frame 51, which is disposed on both sides of the base 50 along its length; the seat also includes a support leg structure 70, which is hinged to the end frame 51 and is adapted to rotate relative to the end frame 51 and form a fixed angle with the end frame 51.

[0089] The end frame 51 is provided with a third stop part 511, and the support leg structure 70 is provided with a third abutment part 71. When a fixed angle is formed between the support leg structure 70 and the end frame 51, the third abutment part 71 abuts against the third stop part 511 to stop the support leg structure 70.

[0090] Optionally, the base 50 further includes an arc-shaped base frame 52, which is disposed on both sides of the base 50 in the width direction. When the support leg structure 70 is retracted, the arc top of the arc-shaped base frame 52 is adapted to abut against the ground so that the seat can rock on the ground.

[0091] It should be noted that, please refer to Figure 5 As shown, the end frame 51 is disposed on both sides of the base 50 along its length, and the support leg structure 70 is hinged to the end frame 51, as shown. Figure 5 As shown, the support leg structure 70 can be retracted into the end frame 51. At this time, the apex of the arc-shaped base frame 52 abuts against the ground, thereby switching the seat to a rocking chair state, allowing the user to push the seat back and forth. Please refer to [link to previous text]. Figure 6 As shown, the support leg structure 70 can also be opened to form a fixed angle with the end frame 51, thereby allowing the seat to switch from the rocking chair state to a stable placement state, enriching the seat's functionality and enhancing its applicability. For example, Figure 7 As shown, the end frame 51 is provided with a third stop part 511, and the support leg structure 70 is provided with a third abutment part 71. The third abutment part 71 abuts against the third stop part 511 to stop the support leg structure 70, thereby maintaining the fixed angle formed between the support leg structure 70 and the end frame 51 after the support leg structure 70 is opened, thereby enhancing the stability of the seat.

[0092] Example 3

[0093] Combination Figures 8-12 As shown, the infant swing provided in this embodiment includes:

[0094] A frame 80, and a seat as described above disposed on the frame 80;

[0095] The base 50 also includes a crossbeam 53, on which a connector 54 is provided, and a connector slot 540 is provided on the connector 54; the frame 80 includes a rocker arm 81, on which a connector 811 is provided, and the connector 811 is adapted to be inserted into the connector slot 540 to connect the seat to the frame 80.

[0096] It should be noted that, please refer to Figure 8 As shown, the seat can be placed on the rocker arm 81 of the frame 80 to form an infant swing, further enriching the product's functions and enhancing its applicability. The base 50 has a crossbeam 53 with a connector 54 and a connector slot 540. The frame 80 includes a rocker arm 81 with a connector 811. During use, the user can connect the seat to the frame 80 by inserting the connector 811 into the connector slot 540, improving the ease of operation.

[0097] Specifically, the frame 80 also includes:

[0098] The support head end 82 is connected to the rocker arm 81, and the support head end 82 is adapted to drive the rocker arm 81 to swing back and forth.

[0099] A support leg 83 is connected to the support head end 82, and the support leg 83 is adapted to support the support head end 82;

[0100] A support arm 84 is disposed between the support head end 82 and the support leg 83. The support arm 84 has a plurality of adjustment holes 840. A locking block 821 is movably disposed on the support head end 82. The locking block 821 is adapted to engage with any of the adjustment holes 840 to adjust the height of the support head end 82 relative to the support leg 83.

[0101] It should be noted that, please refer to Figure 9 As shown, one end of the support arm 84 along the height direction is inserted into the support head end 82, and the other end is connected to the support leg 83; please refer to Figure 11 As shown, the support arm 84 has several adjustment holes 840, and a locking block 821 is movably disposed on the support head end 82. The locking block 821 is adapted to engage with any of the adjustment holes 840 to adjust the height of the support head end 82 relative to the support leg 83; please refer to Figure 10As shown, a latch 842 is also provided at one end of the support arm 84 away from the support leg 83 along the height direction. When the locking block 821 is engaged with any of the adjustment holes 840, the latch 842 can lock the support arm 84 and the support head end 82, thereby preventing the support arm 84 and the support head end 82 from sliding relative to each other along the height direction, thus ensuring the stability between the support arm 84 and the support head end 82.

[0102] Specifically, the support leg 83 includes a first leg 831 and a second leg 832; a folding structure 841 is provided on the support arm 84 near one end of the support leg 83, and the two ends of the folding structure 841 abut against the first leg 831 and the second leg 832 respectively.

[0103] When the retractable structure 841 moves along the width direction, the retractable structure 841 is adapted to simultaneously disengage from and abut against the first leg 831 and the second leg 832 so that the first leg 831 and the second leg 832 retract.

[0104] It should be noted that, please refer to Figure 11 As shown, a folding structure 841 is provided at one end of the support arm 84 near the support leg 83. Please refer to [link / reference]. Figure 12 As shown, when the first support leg 831 and the second support leg 832 are in the supported state, both ends of the folding structure 841 simultaneously abut against the first support leg 831 and the second support leg 832, thereby ensuring that the first support leg 831 and the second support leg 832 can provide stable support for the frame; please combine this with... Figure 9 , Figure 11 and Figure 12 As shown, when folding, the folding structure 841 can be pushed along the width direction so that the folding structure 841 simultaneously disengages from the first support leg 831 and the second support leg 832, thereby folding the first support leg 831 and the second support leg 832 together. This helps reduce the space occupied by the frame. The pushing direction of the folding structure 841 is as follows: Figure 11 and Figure 12 The direction indicated by the middle arrow P.

[0105] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A backrest angle adjustment mechanism, characterized in that, include: front apron(10); The rear tube (20) rotates relative to the front tube (10) with the first rotating shaft (100) as the rotation center; The front tube (10) has a first snap-fit ​​groove (101) and a second snap-fit ​​groove (102) at one end away from the first rotating shaft (100) along the axial direction; The rear casing tube (20) is provided with a sliding groove (201) along the axial direction. A snap-fit ​​block (30) is slidably disposed in the sliding groove (201). The snap-fit ​​block (30) is adapted to selectively snap-fit ​​with any one of the first snap-fit ​​groove (101) and the second snap-fit ​​groove (102). The rear tube (20) is provided with a first abutting part (21) at its end, and the front tube (10) is provided with a first stop part (11), which is adapted to stop the first abutting part (21); the front tube (10) is provided with a second abutting part (12) at its end, and the rear tube (20) is provided with a second stop part (22), which is adapted to stop the second abutting part (12); When the snap-fit ​​block (30) snaps into the first snap-fit ​​groove (101), the first stop part (11) stops the first abutting part (21), and the rear tube (20) and the front tube (10) are coaxially arranged; when the snap-fit ​​block (30) snaps into the second snap-fit ​​groove (102), the second stop part (22) stops the second abutting part (12), and the rear tube (20) and the front tube (10) are arranged at an angle.

2. The backrest angle adjustment mechanism according to claim 1, characterized in that, A spring (31) is also provided in the sliding groove (201). One axial end of the spring (31) abuts against the snap-fit ​​block (30). The spring (31) is adapted to keep the snap-fit ​​block (30) always snapped into the first snap-fit ​​groove (101) or the second snap-fit ​​groove (102).

3. The backrest angle adjustment mechanism according to claim 2, characterized in that, The backrest angle adjustment mechanism also includes: The base (40) is fixedly disposed on the side of the rear casing (20) that is radially away from the front casing (10); The push block (41) is axially fixed to the snap-fit ​​block (30). The push block (41) is adapted to move axially relative to the base (40) under the action of external force, so as to drive the snap-fit ​​block (30) to overcome the resistance of the spring (31) and disengage from the first snap-fit ​​groove (101) or the second snap-fit ​​groove (102).

4. The backrest angle adjustment mechanism according to claim 3, characterized in that, A limiting groove (401) is provided on the base (40). A buckle (411) is provided on the side of the push block (41) near the base (40). The buckle (411) passes radially through the limiting groove (401) and is engaged with the side wall of the base (40) away from the buckle (411). The buckle (411) is adapted to move axially within the limiting groove (401).

5. The backrest angle adjustment mechanism according to any one of claims 1-4, characterized in that, The front tube (10) has a first reinforcing member (13) built into one end near the rear tube (20), the first reinforcing member (13) being adapted to enhance the structural strength of the front tube (10); the rear tube (20) has a second reinforcing member (23) built into one end near the front tube (10), the second reinforcing member (23) being adapted to enhance the structural strength of the rear tube (20).

6. A type of seat, characterized in that, include: A base (50), and a backrest angle adjustment mechanism as described in any one of claims 1-5 connected to the base (50); A bouncing structure (60) is provided between the base (50) and the front tube (10). The bouncing structure (60) is made of elastic material and is adapted to overcome the vertical downward pressure of the front tube (10) to push the front tube (10) to bounce along the height direction.

7. The seat according to claim 6, characterized in that, The base (50) includes an end frame (51) disposed on both sides of the base (50) along its length; the seat also includes a support leg structure (70) hinged to the end frame (51), the support leg structure (70) being adapted to rotate relative to the end frame (51) and to form a fixed angle with the end frame (51); The end frame (51) is provided with a third stop part (511), and the support leg structure (70) is provided with a third abutment part (71). When the support leg structure (70) and the end frame (51) form a fixed angle, the third abutment part (71) abuts against the third stop part (511) to stop the support leg structure (70).

8. A swing for infants and toddlers, characterized in that, include: A frame (80), and a seat as described in any one of claims 6-7 disposed on the frame (80); The base (50) also includes a crossbeam (53), on which a plug-in seat (54) is provided, and a plug-in groove (540) is provided on the plug-in seat (54); the frame (80) includes a rocker arm (81), on which a plug-in part (811) is provided, and the plug-in part (811) is adapted to be inserted into the plug-in groove (540) to connect the seat to the frame (80).

9. The infant swing according to claim 8, characterized in that, The frame (80) also includes: The support head end (82) is connected to the rocker arm (81), and the support head end (82) is adapted to drive the rocker arm (81) to swing back and forth; A support leg (83) is connected to the support head end (82), and the support leg (83) is adapted to support the support head end (82); A support arm (84) is disposed between the support head end (82) and the support leg (83). The support arm (84) has a plurality of adjustment holes (840). A locking block (821) is movably disposed on the support head end (82). The locking block (821) is adapted to engage with any of the adjustment holes (840) to adjust the height of the support head end (82) relative to the support leg (83).

10. The infant swing according to claim 9, characterized in that, The support leg (83) includes a first leg (831) and a second leg (832); a folding structure (841) is provided on one end of the support arm (84) near the support leg (83), and the two ends of the folding structure (841) abut against the first leg (831) and the second leg (832) respectively. When the retractable structure (841) moves along the width direction, the retractable structure (841) is adapted to simultaneously disengage from the first leg (831) and the second leg (832) so that the first leg (831) and the second leg (832) can retract.

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