A backrest assembly

Abstract

The utility model discloses a backrest assembly, including backrest main part (1), backrest main part (1) on fixedly connected with fixed seat (2), the detachable connection of fixed seat (2) has the connecting seat (3), the connecting seat (3) on be connected with the headrest frame (4) of the height adjustment of the up and down movement to it can be opposite, the headrest frame (4) with connecting seat (3) between being equipped with the positioning structure (5) of the headrest frame (4) positioning, the fixed seat (2) with connecting seat (3) between being equipped with the locking structure (6) for locking both, backrest main part (1) on being equipped with the unlocking piece (7) of the locking structure (6) of the operation can be unlocked. The utility model discloses the headrest frame can be conveniently dismantled and conveniently adjust height.

Description

[Technical Field]

[0001] This utility model relates to a backrest assembly. [Background Technology]

[0002] Currently, most strollers on the market are equipped with backrest components to provide seating support. To improve comfort and adaptability, some strollers feature adjustable headrests. However, existing headrest adjustment functions are typically complex in structure, inconvenient to operate, and mostly fixed connections, making it impossible to quickly disassemble or install them according to usage needs, thus limiting the flexibility of use scenarios.

[0003] Therefore, this utility model was created based on the above-mentioned shortcomings. [Utility Model Content]

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a backrest assembly with a simple structure. The headrest frame of this backrest assembly can be easily disassembled and its height can be easily adjusted.

[0005] This utility model is achieved through the following technical solution:

[0006] A backrest assembly includes a backrest body, a fixed base fixedly connected to the backrest body, a connecting base detachably connected to the fixed base, a headrest frame that can move up and down relative to the connecting base to adjust its height, a positioning structure for positioning the headrest frame between the headrest frame and the connecting base, a locking structure for locking the fixed base and the connecting base, and an unlocking component on the backrest body that can unlock the locking structure during operation.

[0007] The locking structure includes locking protrusions on the upper and lower sides of the fixed base. The connecting base has a shell-like structure and is fastened to the fixed base. The upper and lower sides of the connecting base are provided with locking holes that can engage or disengage with the corresponding locking protrusions.

[0008] The connecting seat includes a housing, and the middle of the upper and lower sides of the housing is provided with an elastic sheet integrally connected to it and capable of elastic deformation relative to it. The locking hole is provided on the elastic sheet. The unlocking component includes a button exposed on the backrest body. The button is provided with a pushing part that can push the elastic sheet when it is pressed, thereby disengaging the locking hole from the locking protrusion. A return spring is provided between the backrest body or the fixing seat and the button to push the button back to its original position.

[0009] The push part includes push plates connected to the upper and lower sides of the button. The push plates are provided with inclined surfaces that can abut against the edge of the elastic plate. When the button is pressed, the inclined surfaces open the elastic plate and cause the locking hole to disengage from the locking protrusion.

[0010] The headrest frame has two vertically extending through slots. The connecting seat is connected to the headrest frame through two connectors. The connectors include an abutting part that abuts against the front side of the headrest frame. The abutting part has a connecting piece that passes through the through slots. The connecting piece has elastic buckles on its upper and lower sides. The housing has buckle holes that can engage with the elastic buckles. When the elastic buckles engage with the buckle holes, the abutting part and the connecting seat clamp the headrest frame.

[0011] The connecting piece has a longitudinal groove and a transverse groove that are interconnected on both the upper and lower sides. The part of the connecting piece located on one side of the longitudinal groove and the transverse groove constitutes the elastic buckle. The elastic buckle has a fastening surface that can abut against the wall of the fastening hole when it is engaged with the fastening hole. The other side of the elastic buckle has an inclined wall that can be pushed by the edge of the connecting seat when it is inserted into the connecting seat, so that the elastic buckle is deformed.

[0012] The positioning structure includes a positioning protrusion with an arc surface on the connecting seat, and the headrest frame is provided with multiple positioning grooves that can engage or disengage with the positioning protrusion. Adjacent positioning grooves are transitioned by an arc surface and the shape of the groove wall is adapted to the positioning protrusion.

[0013] The headrest frame includes a middle plate, and a left side plate and a right side plate that can rotate relative to the middle plate are provided on both sides of the middle plate. The left side plate and the right side plate are connected to the middle plate by a damping hinge and can be positioned. The connecting seat is connected to the middle plate.

[0014] A first thin sheet that can be bent is provided between the middle plate and the left plate, located above and below the damping hinge. A second thin sheet that can be bent is provided between the middle plate and the right plate, located above and below the damping hinge. The left plate, the first thin sheet, the middle plate, the second thin sheet and the right plate are an integral injection-molded structure.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The fixed base of this utility model is fixed to the backrest body, and the connecting base is detachably connected to the fixed base. The headrest frame is connected to the connecting base. Therefore, the headrest frame can be removed from the backrest body by detaching the connecting base from the fixed base. After the headrest frame is removed, the user can easily remove and clean the headrest cover. In addition, the headrest frame can also move up and down relative to the connecting base to adjust the height of the headrest frame to accommodate children of different heights and make the children comfortable to sit in.

[0017] 2. When the headrest frame of this utility model needs to be removed, by pressing the button, the inclined surface on the push plate pushes and opens the elastic plate on the connecting seat, thereby causing the locking hole on the connecting seat to disengage from the locking protrusion on the fixing seat. At this time, the headrest frame can be removed. The entire unlocking process only requires pressing the button, which is very convenient and quick to operate.

[0018] 3. This utility model has a simple structure, is easy to assemble and disassemble, and allows for easy adjustment of the headrest height, making it suitable for widespread application. [Attached Image Description]

[0019] Figure 1 This is one of the perspective views of this utility model;

[0020] Figure 2 This is the second perspective view of this utility model;

[0021] Figure 3 This is an exploded view of the present invention;

[0022] Figure 4 This is one of the perspective views of the components of this utility model;

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is one of the cross-sectional views of a component of this utility model;

[0025] Figure 7 This is the second sectional view of a component of this utility model;

[0026] Figure 8 This is a perspective view of the connector of this utility model;

[0027] Figure 9 This is the second perspective view of a component of this utility model;

[0028] Figure 10 This is a perspective view of the connector of this utility model;

[0029] Figure 11 This is a perspective view of the headrest frame of this utility model.

Detailed Implementation Methods

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1 to 7As shown, a backrest assembly can be fitted onto strollers and other children's products to support a child's back and head while riding. The backrest assembly includes a backrest body 1 for back support, a fixed base 2 fixedly connected to the backrest body 1, and a connecting base 3 detachably connected to the fixed base 2. The connecting base 3 and the fixed base 2 are locked together by a locking structure 6. A headrest frame 4, adjustable in height by moving vertically relative to the connecting base 3, is connected to the connecting base 3. After a headrest cover is fitted onto the headrest frame 4, it supports the child's head for comfortable support. A positioning structure 5 is provided between the headrest frame 4 and the connecting base 3 to position the headrest frame 4 at a suitable height. The backrest body 1 is equipped with an unlocking component 7 that unlocks the locking structure 6 during operation. The unlocking component 7 allows for easy detachment of the headrest frame 4 and the connecting base 3 from the fixed base 2 and the backrest body 1, facilitating the removal of the headrest cover from the headrest frame 4.

[0032] like Figures 3 to 5 ,as well as Figure 10 As shown, the locking structure 6 includes locking protrusions 61 on the upper and lower sides of the fixed base 2. The connecting base 3 has a shell-like structure and is fastened to the fixed base 2. The upper and lower sides of the connecting base 3 are provided with locking holes 62 that can engage or disengage with the corresponding locking protrusions 61. When the locking holes 62 engage with the locking protrusions 61, the connecting base 3 and the fixed base 2 remain locked, and the headrest frame 4 is fixed to the backrest body 1. When the locking holes 62 disengage from the locking protrusions 61, the headrest frame 4 can be detached. The locking holes 62 are located on the upper and lower sides of the connecting base 3, and the locking protrusions 61 are also located on the upper and lower sides of the fixed base 2, thus engaging on both the upper and lower sides, making the connecting base 3 and the fixed base 2 securely locked, and ensuring that the headrest frame 4 is installed stably.

[0033] like Figures 3 to 5 ,as well as Figure 9 , Figure 10As shown, the connecting seat 3 includes a housing 31. The housing 31 has elastic plates 32 integrally connected to it and capable of elastic deformation relative to it at the middle of its upper and lower sides. The locking hole 62 is provided on the elastic plate 32. The unlocking component 7 includes a button 71 exposed on the backrest body 1. The button 71 has a push part 72 that can push the elastic plate 32 when it is pressed, thereby disengaging the locking hole 62 from the locking protrusion 61. A return spring 73 is provided between the backrest body 1 or the fixing seat 2 and the button 71, which can push the button 71 to reset. The push part 72 includes push pieces 721 connected to the upper and lower sides of the button 71. The push pieces 721 have an inclined surface 722 that can abut against the edge of the elastic plate 32. When the button 71 is pressed, the inclined surface 722 opens the elastic plate 32, thereby disengaging the locking hole 62 from the locking protrusion 61. When the headrest frame 4 needs to be disassembled, press button 71. The inclined surface 722 on the push plate 721 pushes the edge of the elastic piece 32 and opens the elastic piece 32 to the upper and lower sides, thereby disengaging the locking hole 62 on the elastic piece 32 from the locking protrusion 61 on the fixed seat 2. At this time, the headrest frame 4 can be pulled out. After the headrest frame 4 is disassembled, the elastic piece 32 returns to its original position. The locking protrusion 61 can be provided with an inclined chamfer, so that when the headrest frame 4 is installed, when the edge of the elastic piece 32 on the connecting seat 3 touches the chamfer, the elastic piece 32 can be opened until the connecting seat 3 is fitted onto the fixed seat 2 and the locking protrusion 61 is completely aligned with the locking hole 62. At this time, the elastic piece 32 returns to its original position, and the locking protrusion 61 engages with the locking hole 62. Therefore, when it is necessary to disassemble the headrest frame 4, simply press it and pull it outwards. When installing the headrest frame 4, simply put the shell-shaped connecting seat 3 onto the fixing seat 2. The headrest frame 4 is very convenient and quick to install and remove.

[0034] like Figures 3 to 6 , Figure 8 and Figure 10 As shown, the headrest frame 4 has two vertically extending through slots 41. The connecting seat 3 is connected to the headrest frame 4 via two connecting pieces 8. Each connecting piece 8 includes an abutting part 81 that abuts against the front side of the headrest frame 4. The abutting part 81 has a connecting piece 82 that passes through the through slots 41. The connecting piece 82 has elastic buckles 83 on its upper and lower sides. The housing 31 has buckle holes 33 that can engage with the elastic buckles 83. When the elastic buckles 83 engage with the buckle holes 33, the abutting part 81 and the connecting seat 3 clamp the headrest frame 4. The connecting seat 3 and the abutting part 81 clamp the headrest frame 4 from both sides, so that the headrest frame 4, connecting pieces 8, and connecting seat 3 can be assembled and disassembled from the fixing seat 2 as a whole. Moreover, when adjusting the height of the headrest frame 4, it can be directly pushed up and pulled up and down. The through slots 41 ensure that the connecting piece 82 does not obstruct the vertical movement of the headrest frame 4, making the vertical adjustment of the headrest frame 4 very convenient.

[0035] like Figure 8 and Figure 10 As shown, the connecting piece 82 has a longitudinal groove 84 and a transverse groove 85 that are interconnected on both the upper and lower sides. The part of the connecting piece 82 located on one side of the longitudinal groove 84 and the transverse groove 85 constitutes the elastic buckle 83. The elastic buckle 83 has a fastening surface 86 that can abut against the wall of the fastening hole 33 when it is engaged with the fastening hole 33. The other side of the elastic buckle 83 has an inclined wall 87 that can be pushed by the edge of the connecting seat 3 when it is inserted into the connecting seat 3, thereby deforming the elastic buckle 83. During assembly, the connecting piece 82 passes through the slot 41 on the headrest frame 4, and the abutting part 81 abuts against the front side of the headrest frame 4. When the connecting piece 82 is inserted into the connecting seat 3, the inclined wall 87 on the elastic buckle 83 abuts against the edge of the connecting seat 3. The edge of the connecting seat 3 squeezes the elastic buckle 83, causing it to deform. When the connecting piece 82 is inserted into the set position in the connecting seat 3, the elastic buckle 83 elastically returns and locks into the snap-fit ​​hole 33 on the connecting seat 3. At this time, the snap-fit ​​surface 86 abuts against the hole wall of the snap-fit ​​hole 33, preventing the connecting piece 8 from separating from the connecting seat 3. At this time, the headrest frame 4, the connecting piece 8, and the connecting seat 3 are connected as one unit, making assembly very convenient. When it is necessary to disassemble the three components, simply squeeze the elastic buckle 83 to disengage it from the snap-fit ​​hole 33, and then pull the headrest frame 4 outward to pull the connecting piece 82 out of the connecting seat 3.

[0036] like Figure 7 and Figure 10 As shown, the positioning structure 5 includes a positioning protrusion 51 with an arc surface on the connecting seat 3. The headrest frame 4 is provided with multiple positioning grooves 52 that can engage or disengage with the positioning protrusion 51. Adjacent positioning grooves 52 are transitioned by an arc surface, and the shape of the groove wall of the positioning groove 52 is adapted to the positioning protrusion 51. Therefore, when adjusting the height of the headrest frame 3, the headrest frame 4 can be directly pushed and pulled. The position of the headrest frame 4 can be adjusted and positioned by the compression deformation of the groove wall of the positioning groove 52 and the outer wall of the positioning protrusion 51.

[0037] like Figure 1 and Figure 3As shown, the headrest frame 4 includes a middle plate 42. A left side plate 43 and a right side plate 44, which can rotate relative to the middle plate 42, are provided on both sides of the middle plate 42. The left side plate 43 and the right side plate 44 are connected to the middle plate 42 via damping hinges and can be positioned. The connecting seat 3 is connected to the middle plate 42. The rotation of the left side plate 43 and the right side plate 44 relative to the middle plate 42 creates a recessed area in the headrest frame 4, within which the child's head is positioned, providing some restriction for the child's head and ensuring comfortable seating. The damping hinges connect the two sides of the middle plate 42 to the left side plate 43 and the right side plate 44, allowing the left side plate 43 and the right side plate 44 to rotate relative to the middle plate 42 and to remain in position at any time. The opening degree of the left side plate 43 and the right side plate 44 can be adjusted to accommodate children of different head sizes, ensuring comfortable seating.

[0038] like Figure 11 As shown, a first thin sheet 46 that can be bent is provided between the middle plate 42 and the left plate 43 and above and below the damping hinge 45. A second thin sheet 47 that can be bent is provided between the middle plate 42 and the right plate 44 and above and below the damping hinge 45. The left plate 43, the first thin sheet 46, the middle plate 42, the second thin sheet 47 and the right plate 44 are an integral injection molded structure. When the damping hinge 45 connects the middle plate 42 with the left side plate 43 and the middle plate 42 with the right side plate 44, there will inevitably be gaps between the middle plate 42 and the left side plate 43 and between the middle plate 42 and the right side plate 44. The first thin plate 46 and the second thin plate 47 can block the headrest cover and prevent it from getting stuck in the aforementioned gaps when it is put on the headrest frame 4, so that the headrest cover can be removed and removed smoothly. Moreover, when the left side plate 43 and the right side plate 44 rotate with the damping hinge 45, the first thin plate 46 and the second thin plate 47 can also bend, ensuring that the opening degree of the left side plate 43 and the right side plate 44 can be adjusted.

[0039] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A backrest assembly, characterized in that: The backrest body (1) is fixedly connected to a fixed seat (2), and a connecting seat (3) is detachably connected to the fixed seat (2). A headrest frame (4) that can move up and down relative to the connecting seat (3) to adjust its height is connected to the connecting seat (3). A positioning structure (5) that can position the headrest frame (4) is provided between the headrest frame (4) and the connecting seat (3). A locking structure (6) for locking the fixed seat (2) and the connecting seat (3) is provided between the fixed seat (2) and the connecting seat (3). An unlocking component (7) that can unlock the locking structure (6) during operation is provided on the backrest body (1).

2. The backrest assembly according to claim 1, characterized in that: The locking structure (6) includes locking protrusions (61) on the upper and lower sides of the fixed base (2), the connecting base (3) has a shell-like structure and is fastened to the fixed base (2), and the upper and lower sides of the connecting base (3) are provided with locking holes (62) that can engage or disengage with the corresponding locking protrusions (61).

3. The backrest assembly according to claim 2, characterized in that: The connecting seat (3) includes a housing (31). The housing (31) has elastic plates (32) integrally connected to it and capable of elastic deformation relative to it at the middle of its upper and lower sides. The locking hole (62) is provided on the elastic plate (32). The unlocking component (7) includes a button (71) exposed on the backrest body (1). The button (71) is provided with a pushing part (72) that can push the elastic plate (32) when it is pressed, thereby disengaging the locking hole (62) from the locking protrusion (61). A return spring (73) that can push the button (71) to reset is provided between the backrest body (1) or the fixing seat (2) and the button (71).

4. The backrest assembly according to claim 3, characterized in that: The push part (72) includes push plates (721) connected to the upper and lower sides of the button (71). The push plate (721) is provided with an inclined surface (722) that can abut against the edge of the elastic plate (32). When the button (71) is pressed, the inclined surface (722) opens the elastic plate (32) and causes the locking hole (62) to disengage from the locking protrusion (61).

5. The backrest assembly according to claim 3, characterized in that: The headrest frame (4) is provided with two vertically extending through grooves (41). The connecting seat (3) is connected to the headrest frame (4) through two connecting parts (8). The connecting part (8) includes an abutting part (81) that abuts against the front side of the headrest frame (4). The abutting part (81) is provided with a connecting piece (82) that passes through the through groove (41). The connecting piece (82) is provided with elastic buckles (83) on the upper and lower sides. The housing (31) is provided with a fastening hole (33) that can be fastened with the elastic buckle (83). When the elastic buckle (83) is fastened with the fastening hole (33), the abutting part (81) and the connecting seat (3) clamp the headrest frame (4).

6. The backrest assembly according to claim 5, characterized in that: The connecting piece (82) has a longitudinal groove (84) and a transverse groove (85) that are interconnected on both the upper and lower sides. The part of the connecting piece (82) located on one side of the longitudinal groove (84) and the transverse groove (85) constitutes the elastic buckle (83). The elastic buckle (83) has a fastening surface (86) that can abut against the wall of the fastening hole (33) when it is engaged with the fastening hole (33). The other side of the elastic buckle (83) has an inclined wall (87) that can be pushed by the edge of the connecting seat (3) when it is inserted into the connecting seat (3) to deform the elastic buckle (83).

7. The backrest assembly according to any one of claims 1 to 6, characterized in that: The positioning structure (5) includes a positioning protrusion (51) with an arc surface on the connecting seat (3). The headrest frame (4) is provided with a plurality of positioning grooves (52) that can engage or disengage with the positioning protrusion (51). Adjacent positioning grooves (52) are transitioned by an arc surface and the shape of the groove wall of the positioning groove (52) is adapted to the positioning protrusion (51).

8. The backrest assembly according to any one of claims 1 to 6, characterized in that: The headrest frame (4) includes a middle plate (42), and the middle plate (42) has a left side plate (43) and a right side plate (44) that can rotate relative to it. The left side plate (43) and the right side plate (44) are connected to the middle plate (42) by a damping hinge (45) and can be positioned. The connecting seat (3) is connected to the middle plate (42).

9. The backrest assembly according to claim 8, characterized in that: A first thin sheet (46) that can be bent is provided between the middle plate (42) and the left plate (43) and above and below the damping hinge (45). A second thin sheet (47) that can be bent is provided between the middle plate (42) and the right plate (44) and above and below the damping hinge (45). The left plate (43), the first thin sheet (46), the middle plate (42), the second thin sheet (47) and the right plate (44) are an integral injection molded structure.

Images