Shoulder Strap Width Adjustment Mechanism and Child Safety Seat

Abstract

The present application provides a shoulder strap width adjustment mechanism (40), comprising: a track device (44) disposed on a seat backrest (22), including a first track and a second track that are disposed on both sides of the seat backrest (22) and extend substantially longitudinally, and a lateral distance between the first track and the second track varies gradually in the longitudinal direction; two shoulder strap fixing members (42) connected to a seat headrest (30), located between the seat headrest (30) and the seat backrest (22), and capable of sliding along the first track and the second track of the track device (44) respectively. In the present application, during the process of adjusting the height of the headrest, the width of the shoulder strap is synchronously adjusted, so as to meet the requirements of children of different ages and different body types for the width of the shoulder strap.

Description

Technical Field

[0001] The present application relates to a shoulder strap width adjustment mechanism and a child safety seat for a vehicle, and the child safety seat is provided with a shoulder strap width adjustment mechanism. Background Art

[0002] A child safety seat is a device designed specifically for children of different weights or ages. During a vehicle ride, a child is restrained within the safety seat, so that in the event of a vehicle collision or sudden deceleration, the impact force on the child can be reduced and the movement of the child's body can be restricted, thereby reducing the harm to them and effectively improving the safety of children during vehicle rides.

[0003] Currently, most commercially available child safety seats have the function of adjusting the height of the headrest. For example, in the patent document CN211641926U, a headrest height adjustment mechanism is proposed, which includes: a backrest having a plurality of locking slots; a headrest assembly movably disposed on the backrest; a locking rod disposed on the headrest assembly, the locking rod being movably disposed in the locking slots, and the locking rod can be locked into different locking slots to adjust the height of the headrest assembly relative to the backrest; an adjusting member disposed on the headrest assembly for driving the locking rod; and an elastic member disposed between the adjusting member and the headrest assembly.

[0004] Again, for example, the patent document CN210101399U also discloses a headrest height adjustment device, which includes a headrest and a backrest, and further includes a pulling member, an adjusting member and a reset member. One end of the pulling member is a pulling end, and the other end has a first inclined surface; the adjusting member has a second inclined surface and a first clamping portion. One end of the adjusting member away from the second inclined surface is rotatably connected to the headrest, and a reset member is connected between the adjusting member and the headrest. The second inclined surface is in abutting cooperation with the first inclined surface; a plurality of second clamping portions are provided on the backrest in the height direction. The adjusting member has a fixed position. When the adjusting member is in the fixed position, the first clamping portion is in clamping cooperation with the second clamping portion, and the headrest and the backrest are relatively fixed.

[0005] However, although the height of the headrest can be adjusted in the above-mentioned child safety seats to meet the needs of children of different heights and body types, the width of the shoulder straps cannot be adjusted during the adjustment of the headrest height. Generally speaking, children of different heights and body types have different shoulder widths. Therefore, if the width of the shoulder straps is not adjusted accordingly with the adjustment of the headrest height, it will cause a decrease in the comfort of children when using the safety seat, resulting in children being unwilling to ride in the safety seat. Summary of the Invention

[0006] Therefore, the purpose of the present application is to provide a shoulder strap width adjustment mechanism and a child safety seat, in which the width of the shoulder straps is synchronously adjusted during the adjustment of the headrest height, so as to meet the width requirements of the shoulder straps for children of different ages and body types.

[0007] To this end, the present application provides a shoulder strap width adjustment mechanism, including: a track device disposed on the seat backrest, including a first track and a second track disposed on both sides of the seat backrest and extending substantially longitudinally, and a lateral distance between the first track and the second track varying gradually in the longitudinal direction; two shoulder strap fixing members connected to the seat headrest and located between the seat headrest and the seat backrest, and capable of sliding along the first track and the second track of the track device respectively.

[0008] Preferably, each of the shoulder strap fixing members includes: a first end, a second end, and a shoulder strap accommodating portion located between the first end and the second end, the first end being laterally slidably inserted into a corresponding hole of the seat headrest, and the second end being longitudinally slidably connected to a corresponding track.

[0009] The track device is in the shape of a long groove and has a constant cross-sectional shape; a slider is provided at the second end of the shoulder strap fixing member, and the slider is fitted into the groove.

[0010] The track device may also be in the shape of a rod and has a constant cross-sectional shape; correspondingly, a chute portion is provided at the second end of the shoulder strap fixing member, and the chute portion is fitted onto the rod.

[0011] Each of the shoulder strap fixing members includes: a shoulder strap accommodating portion, and a first member and a second member that are telescopically connected to each other, the first member being laterally slidably inserted into a corresponding hole of the seat headrest, the second member being longitudinally slidably connected to a corresponding track, and the shoulder strap accommodating portion being fixed to the second member.

[0012] Preferably, the first track and the second track are symmetrically disposed about the central axis of the seat backrest.

[0013] The present application also provides a child safety seat for a vehicle, the child safety seat including: a base for connecting to the seat of the vehicle; a seat shell including a seat backrest and a seat bottom, the seat bottom being connected to the base, and two shoulder strap holes being transversely provided in the seat shell for the shoulder straps to pass through; a seat headrest capable of sliding longitudinally and connected to the upper part of the seat shell to accommodate a child's head; and a shoulder strap width adjustment mechanism installed on the seat shell for changing the lateral distance between the shoulder strap holes as the seat headrest slides on the seat shell.

[0014] Preferably, the lateral distance between the two shoulder strap holes increases as the distance between the seat headrest and the seat bottom increases, and decreases as the distance between the seat headrest and the seat bottom decreases.

[0015] The child safety seat of the present application further includes a clamping rod for positioning the seat headrest to the seat shell.

[0016] According to the shoulder strap width adjustment mechanism of the present application and the child safety seat including the shoulder strap width adjustment mechanism, it is possible to synchronously adjust the shoulder strap width while adjusting the height of the headrest, thereby solving the requirements of children of different ages and body types for the shoulder strap width, and greatly improving the comfort and safety of the child safety seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Those skilled in the art will understand that the drawings are mainly for illustrative purposes and are not intended to limit the scope of the inventive subject matter described herein. The drawings are not necessarily drawn to scale; in some cases, various aspects of the inventive subject matter disclosed herein may be exaggerated or enlarged in the drawings for better understanding of different features. In the drawings, the same reference numerals generally refer to the same features (e.g., functionally similar and / or structurally similar elements).

[0018] Figure 1 is a schematic diagram of a child safety seat according to the present application;

[0019] Figure 2 and Figure 3 respectively show different shoulder strap widths when the headrest of the child safety seat is at different heights;

[0020] Figure 4 is a partial schematic diagram of a child safety seat according to the present application;

[0021] Figure 5 and Figure 6 are respectively different structural schematic diagrams of the shoulder strap width adjustment mechanism according to the present application; and

[0022] Figure 7 is a schematic diagram of a shoulder strap fixing member according to the present application.

[0023] LIST OF REFERENCE NUMERALS:

[0024] 1: Child safety seat

[0025] 10: Base

[0026] 20: Seat shell

[0027] 22 Seat backrest 220 Shoulder strap hole

[0028] 24 Seat bottom

[0029] 30: Seat headrest

[0030] 32 Hole

[0031] 40: Shoulder strap width adjustment mechanism

[0032] 44 Track device

[0033] 441 First track 442 Second track

[0034] 42 Shoulder strap fixing member

[0035] 421 First end 422 Second end 423 Shoulder strap accommodating portion

[0036] 4221 Slide block

[0037] 50: Locking lever Detailed implementation manner

[0038] The accompanying drawings and exemplary implementation manners described below do not mean to limit the scope of this implementation manner to a single implementation. The implementation can be achieved by interchanging some or all of the described or illustrated elements. In addition, in the case where some elements of the disclosed exemplary implementation manners can be implemented partially or wholly using known components, in some cases, only those parts of such known components that are necessary for understanding this implementation are described, and the detailed descriptions of other parts of these known components are omitted so as not to obscure this implementation.

[0039] As Figure 1 shown, this figure is a schematic diagram of the child safety seat 1 according to the present application. The child safety seat 1 mainly includes a base 10, a seat shell 20, and a seat headrest 30. The base 10 can be connected and fixed to the seat of an automobile, for example, to fix the child safety seat 1; the seat shell 20 constitutes the main structure of the child safety seat 1, which includes a seat backrest 22 and a seat bottom 24, and the seat backrest 22 and the seat bottom 24 together form the seating space for the child. The headrest 30 is connected to the seat backrest 22, and the head of the child using the safety seat 1 can lean on this headrest 30 to increase comfort. And the headrest 30 can slide longitudinally along the seat backrest 22 to adjust the longitudinal distance between the headrest 30 and the seat bottom 24, so as to meet the needs of children of different ages and different body types and increase the comfort of their sitting on the child seat 1. In addition, in the child safety seat 1 of this embodiment, there are also provided two left and right shoulder strap holes 220 arranged horizontally along the seat backrest 22, and the safety belt of the child seat can be threaded through these two shoulder strap holes 220 to restrain the child in the safety seat 1. Preferably, these two shoulder strap holes 220 are symmetrically distributed about the longitudinal center line of the seat backrest 22.

[0040] The child safety seat 1 of the present application further includes a shoulder strap width adjustment mechanism 40, so that during the process of the headrest 30 sliding longitudinally up and down along the seat backrest 22, the horizontal distance between the shoulder strap holes 220 can change accordingly. For example, in the attached drawings of the present application Figure 2 and attached drawings Figure 3As separately shown, when the headrest 30 is in a relatively upper position with respect to the seat backrest 22 ( Figure 2 as shown), the lateral distance between the shoulder strap holes 220 is, for example, 70 mm, while in Figure 3 , when the headrest 30 slides longitudinally downward along the seat backrest 22 to shorten the distance between the headrest 30 and the seat bottom 24, the lateral distance between the two shoulder strap holes 220 changes to, for example, 50 mm. In this way, for children of different ages and body types, while adjusting the height of the headrest 30, the shoulder strap width is also adjusted accordingly, thereby increasing the riding comfort and safety.

[0041] This application also includes a locking lever 50, as Figure 4 shown, which is used to position the headrest 30 to the seat shell 20, that is, when the headrest 30 slides longitudinally to a suitable position, the locking lever 50 fixes and positions the headrest 30 to the seat shell 20.

[0042] Now refer to Figures 5 - 7 to specifically illustrate the specific structure of the shoulder strap width adjustment mechanism 40 according to this application. Among them, Figure 5 and Figure 6 are respectively schematic structural diagrams of different shoulder strap width adjustment mechanisms according to this application, Figure 7 is a schematic diagram of the shoulder strap fixing member according to this application. The shoulder strap width adjustment mechanism 40 mainly includes a track device 44 and two shoulder strap fixing members 42. The track device 44 further includes a first track 441 and a second track 442 respectively arranged on both sides of the seat backrest 22. Preferably, the first track 441 and the second track 442 are symmetrically distributed about the longitudinal center line of the seat backrest 22. And the lateral distance between the first track 441 and the second track 442 gradually increases in the direction away from the seat bottom 24.

[0043] A specific structural example of the shoulder strap fixing member 42 is shown in Figure 7 , and at the same time refer to Figure 6 and Figure 7As shown, the shoulder strap fixing member 42 includes opposite first end 421 and second end 422, and a shoulder strap accommodating portion 423 located between the first end 421 and the second end 422. The shoulder strap of the child seat can be fixedly connected to the shoulder strap accommodating portion 423. The first end 421 is horizontally inserted into the hole 32 of the headrest 30, and the length of the first end 421 inserted into the hole 32 can be changed as the shoulder strap fixing member 42 slides vertically up and down. For example, during the process of the shoulder strap fixing member 42 sliding vertically away from the seat bottom 24, the length of the first end 421 inserted into the hole 32 gradually decreases. On the contrary, during the process of the shoulder strap fixing member 42 sliding vertically closer to the seat bottom 24, the length of the first end 421 inserted into the hole 32 gradually increases. The second end 422 of the shoulder strap fixing member 42 is longitudinally slidably connected to the corresponding track. For example, in Figure 6 , the second end 422 of the shoulder strap fixing member 42 provided on the left side of the seat backrest 22 is slidably provided on the first track 441, and the second end 422 of the shoulder strap fixing member provided on the right side of the seat backrest 22 is slidably provided on the second track 442. The first ends 421 of the shoulder strap fixing members 42 on both the left and right sides are inserted into the holes 32 of the headrest 30. In this way, during the process of the headrest 30 sliding vertically up and down, on the one hand, the first end of the shoulder strap fixing member 42 is inserted into the hole 32 of the headrest 30, so it can slide along with the headrest. On the other hand, the second end 422 of the shoulder strap fixing member 42 can slide along the first track 441 and the second track 442. Since the lateral distance between the first track 441 and the second track 442 gradually increases in the direction away from the seat bottom 24, the lateral distance between the two shoulder strap fixing members 42 is also driven to gradually increase in the direction away from the seat bottom 24 and gradually decrease in the direction close to the seat bottom 24.

[0044] As a variant embodiment of the shoulder strap fixing member 42, it can also have a telescopic structure, so that the lateral length of the shoulder strap fixing member 42 continuously increases during the process of sliding upward, for example, and continuously decreases during the process of sliding downward, for example. For example, the shoulder strap fixing member 42 in this embodiment includes a shoulder strap accommodating portion 423 for fixing the shoulder strap, and a first member and a second member that are telescopically connected to each other. The first member is horizontally slidably inserted into the corresponding hole 32 of the seat headrest, the second member is longitudinally slidably connected to the corresponding track, and the shoulder strap accommodating portion 423 is fixed to the second member. Thus, as the shoulder strap fixing member slides vertically up and down, relative telescopic movement occurs between the first member and the second member, so that the lateral distance between the two shoulder strap fixing members can be gradually changed as it moves vertically.

[0045] According to an embodiment of the present application, for example, both the first track 441 and the second track 442 are in the shape of a long groove, and the long-groove-shaped track has a constant cross-sectional shape. Correspondingly, a slider 4221 is provided at the second end 422 of the shoulder strap fixing member 42, and the slider 4221 can be fitted into the groove for sliding.

[0046] According to another embodiment of the present application, for example, both the first track 441 and the second track 442 are in the shape of a rod, and the rod-shaped track has a constant cross-sectional shape. Correspondingly, a chute portion is provided at the second end 422 of the shoulder strap fixing member 42, and the chute portion is fitted onto the rod so as to be able to slide.

[0047] The shoulder strap width adjustment mechanism 40 according to the present application and the child safety seat 1 including the shoulder strap width adjustment mechanism 40 can achieve synchronous adjustment of the shoulder strap width while adjusting the height of the headrest 30, thereby solving the requirements of children of different ages and body types for the shoulder strap width, and greatly improving the comfort and safety of the child safety seat 1.

[0048] The present specification provided herein illustrates various features by means of its preferred and exemplary embodiments. Those of ordinary skill in the art will be able to make many other embodiments, modifications, and variations within the scope and spirit of the appended claims by reading this specification.

Claims

1. A shoulder strap width adjustment mechanism (40), comprising: A track device (44) provided on the seat backrest (22), including a first track (441) and a second track (442) that are provided on both sides of the seat backrest (22) and extend substantially longitudinally, and the lateral distance between the first track (441) and the second track (442) varies gradually in the longitudinal direction; Two shoulder strap fasteners (42) connected to the seat headrest (30), located between the seat headrest (30) and the seat backrest (22), and capable of sliding along the first track (441) and the second track (442) of the track device (44) respectively, Wherein: Each of the shoulder strap fasteners (42) includes a first end (421), a second end (422), and a shoulder strap accommodating portion (423) located between the first end and the second end. The first end (421) is laterally slidably inserted into the corresponding hole (32) of the seat headrest, the second end (422) is longitudinally slidably connected to the corresponding track, and the length of the first end inserted into the hole changes as the shoulder strap fastener slides up and down longitudinally.

2. The shoulder strap width adjustment mechanism according to claim 1, wherein: The track device is in the shape of a long groove and has a constant cross-sectional shape; a slider (4221) is provided at the second end (422) of the shoulder strap fastener (42), and the slider (4221) is fitted into the groove.

3. The shoulder strap width adjustment mechanism according to claim 1, wherein: The track device is in the shape of a rod and has a constant cross-sectional shape; a chute portion is provided at the second end (422) of the shoulder strap fastener (42), and the chute portion is fitted onto the rod.

4. A shoulder strap width adjustment mechanism (40), comprising: A track device (44) provided on the seat backrest (22), including a first track (441) and a second track (442) that are provided on both sides of the seat backrest (22) and extend substantially longitudinally, and the lateral distance between the first track (441) and the second track (442) varies gradually in the longitudinal direction; Two shoulder strap fasteners (42) connected to the seat headrest (30), located between the seat headrest (30) and the seat backrest (22), and capable of sliding along the first track (441) and the second track (442) of the track device (44) respectively, Wherein: Each of the shoulder strap fasteners (42) includes a shoulder strap accommodating portion (423), and a first member and a second member that are telescopically connected to each other. The first member is laterally slidably inserted into the corresponding hole (32) of the seat headrest, the second member is longitudinally slidably connected to the corresponding track, and the shoulder strap accommodating portion is fixed to the second member.

5. The shoulder strap width adjustment mechanism according to claim 1 or 4, wherein: The first track (441) and the second track (442) are symmetrically arranged about the central axis of the seat backrest (22) left and right.

6. A child safety seat (1) for a vehicle, the child safety seat comprising: A base (10) for connecting to a seat of the vehicle; A seat shell (20) including a seat backrest (22) and a seat bottom (24), the seat bottom (24) being connected to the base (10), and two shoulder strap holes (220) being transversely provided in the seat shell (20) for the shoulder straps to pass through; A seat headrest (30) slidably connected longitudinally to an upper part of the seat shell (20) for placing a child's head; And A shoulder strap width adjustment mechanism (40) according to any one of claims 1-5, mounted on the seat shell (20) for changing a transverse distance between the shoulder strap holes (220) as the seat headrest (30) slides on the seat shell (20).

7. The child safety seat according to claim 6, wherein: The transverse distance between the two shoulder strap holes (220) increases as the distance between the seat headrest (30) and the seat bottom (24) increases, and decreases as the distance between the seat headrest (30) and the seat bottom (24) decreases.

8. The child safety seat according to claim 6, further comprising a locking lever (50) for positioning the seat headrest (30) to the seat shell (20).

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