Headrest height adjusting mechanism and safety seat

Abstract

The utility model discloses a headrest height adjusting mechanism and a safety seat, the headrest height adjusting mechanism comprises a chair back and a headrest adjustably arranged on the chair back, the chair back is further provided with a headrest supporting piece, the headrest supporting piece is located between the chair back and the headrest, the headrest supporting piece comprises a connecting end face and a supporting end face which are oppositely arranged, and the connecting end face and the supporting end face are connected with each other. The connecting end face is suitable for abutting against the chair back, the supporting end face is suitable for abutting against the headrest, and then the headrest supporting piece is suitable for limiting the headrest from shaking backwards relative to the chair back. According to the headrest height adjusting mechanism, the headrest supporting piece is arranged between the headrest and the chair back, the connecting end face of the headrest supporting piece is suitable for being connected with the chair back in an abutting mode, the supporting end face of the headrest supporting piece is suitable for being connected with the headrest in an abutting mode, and then the headrest supporting piece can support the headrest; when the vehicle accelerates or decelerates urgently, the headrest is limited to shake backwards relative to the chair back, protection of the headrest to the head and the neck of a child is improved, and the probability that a child passenger is injured is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of child safety seats, and particularly relates to a headrest height adjustment mechanism and a safety seat. Background Art

[0002] A child safety seat is a safety device specifically designed for children of different ages or body types. It can be installed in a vehicle through an ISOFIX component, which can effectively improve the safety of children in the car. Moreover, when in use, in order to improve the riding comfort and safety factor, special consideration is given to the support and wrapping of the seat body when designing a child safety seat. Generally, a child safety seat is provided with a headrest to better protect the head of the child occupant. The headrest is arranged above the seat body and is designed in a U shape. Most headrests are filled with relatively thick cushioning materials for the headrest part and the two wings.

[0003] For existing child safety seats to adapt to children of different heights, the headrest is usually set to be adjustable in height up and down. Users can adjust the headrest to different heights according to the specific conditions of different children to better protect the head of the child occupant. However, the headrest height adjustment mechanism in existing child safety seats will inevitably leave a gap between the headrest and the backrest. Then, when the vehicle accelerates or decelerates suddenly, the headrest will shake backward relative to the backrest. In particular, when the height of the headrest is adjusted to a high position, part of the headrest will be higher than the backrest. When the vehicle accelerates or decelerates suddenly, the backward shaking of the headrest relative to the backrest will be aggravated, and the head and neck of the child cannot be well supported and protected, which is likely to cause injury to the child. Summary of the Invention

[0004] One object of the present application is to provide a headrest height adjustment mechanism to solve the problem of insufficient support of the headrest of the existing safety seat.

[0005] Another object of the present application is to provide a safety seat.

[0006] To achieve the above object, the technical solution adopted in the present application is as follows: A headrest height adjustment mechanism includes a backrest and a headrest adjustably arranged on the backrest. A headrest support member is further arranged on the backrest. The headrest support member is located between the backrest and the headrest. The headrest support member includes oppositely arranged connection end faces and support end faces. The connection end face is adapted to abut against the backrest, and the support end face is adapted to abut against the headrest. Thus, the headrest support member is adapted to limit the backward shaking of the headrest relative to the backrest.

[0007] As a preference, the headrest support member includes a backrest top cover, a support convex bulge is provided on the front end face of the backrest top cover, the front end face of the support convex bulge protrudes from the front end face of the backrest top cover to form the support end face, and the support end face is adapted to abut against the back of the headrest to support the headrest.

[0008] As another preference, the support convex bulge further includes a connecting inclined surface, the connecting inclined surface is arranged below the support end face, and both ends of the connecting inclined surface are respectively connected to the support end face and the front end face of the backrest top cover, so that the support end face and the front end face of the backrest top cover are in smooth transition.

[0009] Further preferably, two of the support convex bulges are provided on the backrest top cover, the support convex bulges are symmetrically arranged on the left and right on the front end face of the backrest top cover, and the support convex bulges extend along the vertical direction of the backrest.

[0010] Furthermore, the headrest support member further includes a support side plate, a first end of the support side plate is integrally formed and connected to the backrest top cover, so that the support side plate is vertically arranged on the back end face of the backrest top cover, a second end of the support side plate extends towards the backrest direction, a back end face of the second end forms the connection end face, and the connection end face is adapted to abut against the backrest to support the backrest top cover and the support convex bulge.

[0011] Furthermore, an installation groove is provided on the backrest top cover, a threaded hole is opened at the bottom of the installation groove, an installation post matched with the installation groove is provided on the backrest, an internal thread is provided on the installation post, and thus the headrest support member can be installed on the backrest through the cooperation of an installation bolt with the threaded hole and the internal thread.

[0012] Furthermore, the headrest support member further includes a reinforcing rib plate, the reinforcing rib plate is arranged at the top of the back end face of the backrest top cover and above the support side plate, and the reinforcing rib plate extends from the left end face of the backrest top cover to the right end face of the backrest top cover along the length direction of the backrest top cover.

[0013] Furthermore, the reinforcing rib plate has a cuboid structure with a hollow interior, and four side walls of the reinforcing rib plate extend vertically outwards towards the backrest direction.

[0014] Furthermore, the distance between the support end face and the front end face of the backrest top cover is 3 mm - 20 mm.

[0015] On the other hand, the present application further provides a safety seat, which includes the above-mentioned headrest height adjustment mechanism.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows:

[0017] The headrest height adjustment mechanism provided by the present application is achieved by arranging a headrest support member between the headrest and the seat back, the connecting end surface of the headrest support member is suitable for abutting against the seat back, and the supporting end surface of the headrest support member is suitable for abutting against the headrest, so that the headrest support member can support the headrest, and limit the headrest from swinging backward relative to the seat back when the vehicle accelerates or decelerates suddenly, thereby improving the protection of the headrest for the child's head and neck and reducing the probability of injury to the child occupant; in addition, the supporting bulge will not affect the smoothness of the headrest height adjustment, and the smoothness of the headrest adjustment can be guaranteed while supporting the headrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded schematic diagram of the headrest height adjustment mechanism of the present application.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the headrest height adjustment mechanism of the present application.

[0020] Figure 3 This is a cross-sectional view of the headrest height adjustment mechanism of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the headrest support member in the headrest height adjustment mechanism of the present application.

[0022] Figure 5 This is a schematic diagram of the structure of the seat back and headrest support in the headrest height adjustment mechanism of the present application.

[0023] In the figure: 100, seat back; 110, adjustment slide; 120, mounting column; 200, headrest; 210, headrest guide block; 300, headrest support; 310, seat back top cover; 320, support side panel; 330, mounting groove; 331, threaded hole; 340, support convex bump; 350, connecting end face; 360, support end face; 370, connecting slope; 380, reinforcement rib. DETAILED DESCRIPTION

[0024] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0027] The terms "comprising" and "having" in the description and claims of the present application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] A safety seat is a seat installed in a household car for children to ride. In order to better ensure the safety of children when riding, a headrest is usually installed on the safety seat to better protect the heads and necks of child occupants. Considering that the heights of each child are different in the infant and toddler period, and the height and body shape of children will also change during the growth process, it is necessary to adjust the height of the headrest according to the specific conditions of different periods and different children. However, the headrest height adjustment mechanism in the existing child safety seats will inevitably leave a gap between the headrest and the backrest. As a result, when the vehicle accelerates or decelerates suddenly, the headrest will shake back and forth relative to the backrest. Especially when the height of the headrest is adjusted to a high position, part of the headrest will be higher than the backrest, and the back-and-forth shaking of the headrest relative to the backrest will be aggravated when the vehicle accelerates or decelerates suddenly. The heads and necks of children cannot be well supported and protected, and it is easy to cause injuries to child occupants.

[0029] Based on the above problems, as Figures 1-5As shown, the present application provides a headrest height adjustment mechanism, which includes a chair back 100 and a headrest 200 provided on the chair back 100. A headrest support 300 is also provided on the chair back 100. The headrest support 300 is located between the chair back 100 and the headrest 200. The headrest support 300 includes oppositely arranged connecting end faces 350 and supporting end faces 360. The connecting end face 350 is adapted to abut against the chair back 100, and the supporting end face 360 is adapted to abut against the headrest 200. The headrest support 300 can support the headrest 200. In other words, the headrest support 300 can fill part of the gap between the headrest 200 and the chair back 100, so that when the headrest 200 is adjusted relative to the chair back 100, at least a part of the headrest 200 always abuts against the headrest support 300. The headrest support 300 is adapted to support the headrest 200 to limit the headrest 200 from shaking back and forth relative to the chair back 100 during sudden acceleration or deceleration of the vehicle. The headrest 200 provides good support and protection for the head and neck of children, avoiding harm to child occupants.

[0030] Further, the headrest height adjustment mechanism includes a chair back 100 and a headrest 200 provided on the upper part of the chair back 100. The chair back 100 is U-shaped and forms a receiving groove body extending along a 7-shaped. The headrest 200 is provided at a position corresponding to the head of a child in the chair back 100. Since children are in the growth stage, the headrest 200 is adjustably provided on the chair back 100 to adapt to the heights of children in different age stages. Two symmetric adjustment chutes 110 are provided in the chair back 100. The adjustment chutes 110 are rectangular long grooves extending vertically along the chair back 100. Two headrest guide blocks 210 are provided on the headrest 200. The headrest guide blocks 210 can be implemented as cube-shaped or rectangular parallelepiped-shaped sliders adapted to the adjustment chutes 110. The headrest guide blocks 210 are fixed to the bottom of the headrest 200, and the positions of the two headrest guide blocks 210 correspond to the positions of the adjustment chutes 110. The two side edges of the headrest guide blocks 210 are sleeved in the adjustment chutes 110, and the headrest guide blocks 210 slide in the adjustment chutes 110, thereby adjusting the position of the headrest 200 inside the chair back 100, so that the headrest 200 can be adjusted to different positions inside the chair back 100 corresponding to the heads of children in different age stages, achieving the effect of protecting and supporting the heads of children.

[0031] In some embodiments, the headrest support 300 specifically includes a backrest top cover 310 and support side plates 320. Two mounting grooves 330 are formed on the front end face of the backrest top cover 310. The two mounting grooves 330 are symmetrically arranged on the backrest top cover 310 in the left-right direction. Threaded holes 331 for bolts to pass through are formed on the bottom of the mounting grooves 330. An installation post 120 that cooperates with the threaded holes 331 is provided on the upper part of the backrest 100. Internal threads are provided on the installation post 120. When the backrest top cover 310 is installed on the backrest 100, the threaded holes 331 are aligned with the internal threads, and the mounting bolts can pass through the threaded holes 331 and be threadedly connected to the installation post 120 to install the backrest top cover 310 on the backrest 100. The support side plates 320 are located on the left and right sides of the backrest top cover 310. The first end of the support side plate 320 is integrally formed and connected to the backrest top cover 310, so that the support side plate 320 is vertically arranged on the rear end face of the backrest top cover 310. The second end of the support side plate 320 extends towards the backrest 100, and the second end is adapted to abut against the backrest 100. Furthermore, the end face of the second end forms a connection end face 350. The shape of the connection end face 350 is adapted to the backrest 100, and the connection end face 350 can be closely attached to the backrest 100, improving the stability of the headrest support 300 and preventing the headrest support 300 from shaking when the headrest support 300 supports the headrest 200.

[0032] Two support bumps 340 are provided on the front end face of the backrest top cover 310. The support bumps 340 protrude from the front end face of the backrest top cover 310 towards the headrest 200. The two support bumps 340 are symmetrically arranged on the backrest top cover 310 in the left-right direction. The end faces of the two support bumps 340 form a support end face 360. The support end face 360 is adapted to abut against the headrest 200, so that the headrest support 300 can support the headrest 200 and prevent the headrest 200 from shaking backward during sudden acceleration or deceleration of the vehicle, resulting in the headrest 200 being unable to support the head of the child occupant and causing injury to the head and neck of the child occupant.

[0033] In some preferred embodiments, the supporting convex hull 340 is implemented as a cuboid bump. The supporting convex hull 340 extends along the vertical direction of the backrest 100. The supporting convex hull 340 further includes a connecting inclined surface 370. The connecting inclined surface 370 is arranged below the supporting end surface 360, and both ends of the connecting inclined surface 370 are respectively connected to the supporting end surface 360 and the front end surface of the backrest top cover 310, so that the supporting end surface 360 and the front end surface of the backrest top cover 310 are smoothly connected. Since the backrest 100 is a U-shaped accommodating groove formed by extending along a 7-shaped shape, when the headrest 200 is adjusted to different height positions relative to the backrest 100, the gap between the headrest 200 and the backrest 100 will also be different. The setting of the connecting inclined surface 370 enables the headrest 200 to always be in contact with the headrest support 300 whether it is at a low height position or a high height position. It is ensured that the headrest support 300 can support the headrest 200 in any position of the headrest 200. In short, when the headrest 200 is at a low height position, the gap between the headrest 200 and the backrest 100 is small, and the top end of the headrest 200 is adapted to contact the connecting inclined surface 370. When the headrest 200 is at a high height position, the distance between the headrest 200 and the backrest 100 is large, and the bottom end of the headrest 200 is adapted to contact the supporting end surface 360. The settings of the supporting end surface 360 and the supporting end surface 360 can ensure the smooth sliding of the headrest 200 during adjustment and enable the headrest 200 to be supported by the headrest support 300 at any gear height.

[0034] It is worth mentioning that the thickness of the supporting convex hull 340 can be set according to the size of the gap between the headrest 200 and the backrest 100 in the actual child seat product. That is, the height of the supporting end surface 360 protruding from the front end surface of the backrest top cover 310 can be set according to the gap between the headrest 200 and the backrest 100, so as to avoid the situation that the thickness of the supporting convex hull 340 is too small for the headrest support 300 to support the headrest 200, or the thickness of the supporting convex hull 340 is too large for the headrest support 300 to affect the smooth sliding of the headrest 200 relative to the backrest 100. Generally, the thickness of the supporting convex hull 340 is 3 mm - 20 mm. In the illustrated embodiment, the thickness of the supporting convex hull 340 is implemented as 10 mm.

[0035] Further, a reinforcing rib 380 is provided on the rear end surface of the backrest top cover 310. The reinforcing rib 380 is arranged at the top of the rear end surface of the backrest top cover 310 and above the supporting side plate 320. The upper end surface of the reinforcing rib 380 is flush with the upper end surface of the backrest top cover 310. The reinforcing rib 380 extends from the left end surface to the right end surface of the backrest top cover 310 along the length direction of the backrest top cover 310. That is to say, the reinforcing rib 380 can cover the entire upper edge of the backrest top cover 310. The reinforcing rib 380 is suitable for enhancing the anti-deformation ability of the backrest top cover 310.

[0036] like Figure 1 As shown, in a specific embodiment, the reinforcing rib 380 is in the shape of a rectangular block with a hollow interior, and the four walls of the reinforcing rib 380 extend vertically outward in the direction toward the chair back 100. That is to say, the provision of the reinforcing rib 380 increases the thickness of the upper portion of the chair back cover 310, thereby improving the deformation resistance of the chair back cover 310. The internal hollowness of the reinforcing rib 380 can reduce the weight of the chair back cover 310 while ensuring the structural strength of the chair back cover 310.

[0037] Specifically, when the headrest support 300 is installed on the seatback 100, the seatback top cover 310 is connected to the seatback 100 only through the supporting side plate 320 and the mounting groove 330 at the lower part thereof, and the upper part of the seatback top cover 310 is higher than the seatback 100 and lacks the support of the seatback 100. When the vehicle accelerates or decelerates suddenly, the seatback top cover 310 will be deformed when subjected to the reverse force of the headrest 200, and thus cannot support the headrest 200. The provision of the reinforcing rib 380 can enhance the structural strength of the upper edge of the seatback top cover 310, so that the upper edge of the seatback top cover 310 is not easily deformed when subjected to the force. The seatback top cover 310 can support the headrest 200 through the supporting convex bump 340, and can limit the headrest 200 from shaking backwards when the vehicle accelerates or decelerates suddenly, thereby protecting the neck and head of the child passenger from injury.

[0038] The present application also provides a safety seat, which includes the above-mentioned headrest height adjustment mechanism.

[0039] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A headrest height adjustment mechanism, characterized in that, It includes a chair back and a headrest adjustably arranged on the chair back. A headrest support is also arranged on the chair back. The headrest support is located between the chair back and the headrest. The headrest support includes oppositely arranged connecting end faces and supporting end faces. The connecting end face is adapted to abut against the chair back, and the supporting end face is adapted to abut against the headrest. Thus, the headrest support is adapted to limit the backward sway of the headrest relative to the chair back.

2. The headrest height adjustment mechanism according to claim 1, characterized in that, The headrest support includes a chair back top cover. A supporting convex bump is arranged on the front end face of the chair back top cover. The front end face of the supporting convex bump protrudes from the front end face of the chair back top cover to form the supporting end face. The supporting end face is adapted to abut against the back of the headrest to support the headrest.

3. The headrest height adjustment mechanism according to claim 2, characterized in that, The supporting convex bump further includes a connecting inclined plane. The connecting inclined plane is arranged below the supporting end face, and both ends of the connecting inclined plane are respectively connected to the supporting end face and the front end face of the chair back top cover, so that the supporting end face and the front end face of the chair back top cover are in smooth transition.

4. The headrest height adjustment mechanism according to claim 3, wherein, Two such supporting convex bumps are arranged on the chair back top cover. The supporting convex bumps are symmetrically arranged left and right on the front end face of the chair back top cover, and the supporting convex bumps extend along the vertical direction of the chair back.

5. The headrest height adjustment mechanism according to claim 3, wherein, The headrest support further includes a supporting side plate. The first end of the supporting side plate is integrally formed and connected with the chair back top cover, so that the supporting side plate is vertically arranged on the rear end face of the chair back top cover. The second end of the supporting side plate extends towards the chair back direction, and the rear end face of the second end forms the connecting end face. The connecting end face is adapted to abut against the chair back to support the chair back top cover and the supporting convex bump.

6. The headrest height adjustment mechanism according to claim 5, characterized in that, An installation groove is arranged on the chair back top cover. A threaded hole is opened at the bottom of the installation groove. An installation post matched with the installation groove is arranged on the chair back. An internal thread is arranged on the installation post. Thus, the headrest support can be installed on the chair back through the cooperation of an installation bolt with the threaded hole and the internal thread.

7. The headrest height adjustment mechanism according to any one of claims 5-6, characterized in that, The headrest support further includes a reinforcing rib plate. The reinforcing rib plate is arranged at the top of the rear end face of the chair back top cover and above the supporting side plate. The reinforcing rib plate extends from the left end face of the chair back top cover to the right end face of the chair back top cover along the length direction of the chair back top cover.

8. The headrest height adjustment mechanism according to claim 7, characterized in that, The reinforcing rib plate has a cuboid structure with a hollow interior. The four side walls of the reinforcing rib plate extend vertically outwards towards the chair back direction.

9. The headrest height adjustment mechanism according to claim 7, characterized in that, The distance between the supporting end face and the front end face of the chair back top cover is 3 mm - 20 mm.

10. A safety seat, characterized in that, It includes a headrest height adjustment mechanism as described in any one of claims 1 - 9.

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