CN211195937U

CN211195937U - Backrest height adjusting mechanism and safety seat

Info

Publication number: CN211195937U
Application number: CN201922301990.3U
Authority: CN
Inventors: 林江娟; 张志彬; 夏环乐
Original assignee: Ningbo Welldon Baby Safety Technology Co ltd
Current assignee: Ningbo Welldon Baby Safety Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-07
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a backrest height adjusting mechanism and a safety seat, which comprises a backrest main body, wherein the lower end of the backrest main body is provided with a mounting hole; the upper end of the connecting piece is arranged in the mounting hole in a sliding manner along the vertical direction, and the lower end of the connecting piece is connected with the seat; the limiting assembly is arranged between the connecting piece and the backrest main body and used for locking the relative position between the connecting piece and the backrest main body; the driving assembly is arranged on the backrest main body and used for driving the limiting release between the connecting piece and the backrest main body, so that the connecting piece and the backrest main body can move relatively, and the height of the backrest main body can be adjusted. The utility model discloses a safety seat and back height adjusting mechanism thereof realizes the height adjustment through the relative position between control back main part and the connecting piece, simple structure, and it is convenient to adjust.

Description

Backrest height adjusting mechanism and safety seat

Technical Field

The utility model belongs to the technical field of the safety seat technique and specifically relates to a back height adjusting mechanism and safety seat.

Background

As is well known, automobiles are equipped with various safety devices such as vehicle-mounted safety belts and airbags, but these safety devices cannot protect children due to the height of children, and even can injure children in an accident. Therefore, when a child goes out by taking the automobile, the child needs to use the safety seat of the child. Children over 4 years old have become available without the use of a five-point safety belt because their height and size have changed significantly from infants. The safety seats used by children at this stage are of two types, one is a booster type safety seat and the other is a safety booster cushion. The safety heightening pad and the heightening type safety seat can ensure that children normally use the vehicle-mounted safety belt in the vehicle, and can effectively avoid the injury to the children caused by overturning and collision when collision occurs. The heightening type safety seat has the advantages that besides the function of the heightening pad, one layer of side wing protection is added, but the heightening pad is lighter and more flexible, and can be used as entry-level safety equipment for temporary trips or short-distance city trips.

The rear portion of the height-increasing type safety seat in the prior art is further provided with a small backrest mechanism to improve the comfort of taking children, but in the existing structure, the height of the small backrest is fixed and cannot be adjusted, and the height of the children at the same age cannot be guaranteed to be on the same level.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a technical problem that will solve is: overcomes the defects of the prior art, and provides a backrest height adjusting mechanism with simple structure and convenient adjustment.

The utility model discloses another technical problem that will solve is: the utility model provides a safety seat, the little back height at the seat rear portion can be adjusted according to actual demand, and adjusts simple structure, convenient operation.

The utility model adopts the technical proposal that: the utility model provides a back height adjustment mechanism is applicable to children's safety seat for realize children's safety seat back height's regulation, its characterized in that includes:

the backrest comprises a backrest main body, wherein the lower end of the backrest main body is provided with a mounting hole;

the upper end of the connecting piece is arranged in the mounting hole in a sliding manner along the vertical direction, and the lower end of the connecting piece is connected with the seat;

the limiting assembly is arranged between the connecting piece and the backrest main body and used for locking the relative position between the connecting piece and the backrest main body;

the driving assembly is arranged on the backrest main body and used for driving the limiting release between the connecting piece and the backrest main body, so that the connecting piece and the backrest main body can move relatively, and the height of the backrest main body can be adjusted.

Compared with the prior art, the utility model has the following advantage:

the utility model discloses in, the back structure includes the back main part, is equipped with the connecting piece at its lower extreme, and the lower extreme and the seat of connecting piece are connected, can relative movement and locking between the upper end of connecting piece and the back main part, realize the altitude mixture control of back main part for the seat to simple structure, it is convenient to adjust.

Preferably, the limiting assembly comprises a limiting block, the limiting block is arranged on the connecting piece or the backrest main body, and correspondingly, a limiting groove matched with the limiting block is arranged on the backrest main body or the connecting piece.

As an improvement, the driving assembly comprises a pulling plate arranged on the backrest main body, the upper end of the connecting piece is provided with an open slot, the lower end of the pulling plate is arranged in the open slot in a sliding manner, a plurality of limiting slots are vertically arranged on two side walls of the open slot, and the lower end of the pulling plate is provided with a guide hole which is inclined inwards from top to bottom; the one end of stopper passes through the guide post cooperation in the guiding hole, and the other end cooperation is in the spacing inslot, when upwards pulling arm-tie, under the effect of guiding hole, the stopper break away from the spacing groove for the back can reciprocate.

In another improvement, a reset component is arranged between the pulling plate and the backrest main body, so that the pulling plate always has the trend of moving downwards.

The backrest main body comprises an inner shell and an outer shell, an accommodating cavity for accommodating the connecting plate is formed between the inner shell and the outer shell, and the lower end of the accommodating cavity is open. The backrest main body adopts a split structure, the two parts are separately processed, the processing is convenient, and the backrest main body can be assembled together after being processed.

And the improved structure is characterized in that an opening is formed in the middle of the connecting piece, a connecting plate is arranged on the lower end face of the opening, a limiting plate is arranged on one side, close to the inner shell, of the outer shell, the limiting plate is arranged in the opening in a penetrating mode, and an elastic piece is arranged between the lower end of the limiting plate and the connecting plate to form the reset assembly.

As an improvement, the upper end of the outer shell is provided with a window communicated with the accommodating cavity, the upper end of the pull plate is exposed out of the window, and an inner groove is formed in the part of the pull plate exposed out of the window. The force application contact area is increased after the inner groove is arranged, and the finger can conveniently stretch into the finger to operate.

As an improvement, the limiting block is of an isosceles trapezoid structure with a small upper side and a large lower side, and the limiting groove is of a triangular structure matched with the bottom angle of the limiting block. The limit structure of the shape can automatically move down to the limit stop below under the guiding action of the trapezoid inclined plane when external force is applied to the top of the backrest main body due to the structural characteristic of the trapezoid structure when the backrest main body and the connecting piece are limited in the limit groove of the higher level.

Correspondingly, the utility model discloses another technical scheme who takes is: the utility model provides a safety seat, includes back main part and seat, the lower extreme of back main part is connected with the seat rotation, still includes foretell back height adjustment mechanism.

Preferably, the side wall of the open slot is provided with three layers of limiting grooves, and when the backrest main body moves upwards to the limiting block to be matched in the limiting groove at the uppermost layer, the backrest main body can turn towards the center of the seat until being accommodated on the base of the seat. The backrest main body can be accommodated on the seat base, so that the seat is convenient to package, and the space is saved.

Drawings

Fig. 1 is a structural view of a safety seat of the present invention.

Fig. 2 is a structural view of the safety seat of the present invention with the backrest removed.

Fig. 3 is a structural view of the backrest of the present invention.

Fig. 4 is an exploded view of the backrest main body and the connecting member according to the present invention.

Fig. 5 is a structural view of the backrest structure of the present invention with the inner case removed.

Fig. 6 is a structural view of the backrest structure of the present invention with the outer shell removed.

Fig. 7 is a sectional view of the backrest structure of the present invention.

Fig. 8 is an exploded view of the backrest main body and the connecting member according to the present invention.

Fig. 9 is an exploded view of another angle of the backrest main body and the connecting member according to the present invention.

Wherein, 1-backrest main body, 101-seat, 102-flange, 102.1-installation groove,

1-connecting piece, 1.1-open slot, 2-limit block, 3-limit slot, 4-pulling plate, 4.1-guide hole, 4.2-opening, 4.3-connecting plate, 4.1-inner groove, 5-guide post, 6-inner shell, 7-outer shell, 7.1-limit plate, 7.2-window, 8-elastic piece, 9-connecting shaft and 10-clamping slot.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

In the description of the present invention, it should be noted that the terms "upper end", "lower end", "both side walls", "middle part", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the present invention provides a safety seat, which comprises a seat 101 and a backrest rotatably disposed at the rear portion of the seat 101, wherein the height of the backrest along the vertical direction can be adjusted according to actual needs, and the safety seat is substantially a height-increasing type safety seat suitable for children with a slightly older age.

Specifically, the height adjustment mechanism of the backrest comprises:

the backrest comprises a backrest main body 100, wherein a mounting hole 100.1 is formed in the lower end of the backrest main body 100; in this embodiment, the backrest main body 100 includes an inner shell 6 and an outer shell 7 which are directly formed by injection molding, the inner shell 6 and the outer shell 7 are installed oppositely to form the complete backrest main body 100, and an accommodating cavity is provided between the inner shell 6 and the outer shell 7, and the lower end of the accommodating cavity is an open end to form a mounting hole 100.1;

as shown in fig. 2, 3 and 4, the connecting piece 1, the upper end of the connecting piece 1 is slidably arranged in the mounting hole 100.1 along the vertical direction, the lower end of the connecting piece 1 is rotatably connected with the seat 101, specifically, a flange 102 is arranged at the rear part of the seat 101 along the vertical protrusion, a mounting groove 102.1 is arranged in the middle of the flange 102, a connecting shaft 9 is arranged at the lower end of the mounting groove 102.1 along the horizontal direction, a clamping groove 10 is integrally formed at the lower end of the connecting piece 1, and the connecting piece 1 is rotatably matched with the outside of the connecting shaft 9 through the clamping groove 10.

The upper end of the connecting piece 1 is provided with a limiting block 2, a plurality of limiting grooves 3 are vertically arranged on the backrest main body 100, or the backrest main body 100 is provided with the limiting block 2, the connecting piece 1 is vertically provided with a plurality of limiting grooves 3, and the limiting block 2 is vertically matched in any limiting groove 3 in a switchable manner to form a limiting assembly for locking the relative position between the connecting piece 1 and the backrest main body 100;

and the driving assembly is arranged on the backrest main body 100 and used for driving the spacing between the connecting piece 1 and the backrest main body 100 to be released, so that the connecting piece 1 and the backrest main body 100 can move relatively, and the height adjustment of the backrest main body 100 is realized.

Specifically, as shown in fig. 5 to 9, the driving assembly includes a pulling plate 4 disposed on the backrest main body 100, the pulling plate 4 is slidably disposed in the accommodating cavity of the backrest main body 100, the upper end of the connecting member 1 is provided with an open slot 1.1, the lower end of the pulling plate 4 is slidably disposed in the open slot 1.1, two side walls of the open slot 1.1 are vertically provided with a plurality of limiting slots 1.1, and two sides of the lower end of the pulling plate 4 are provided with guide holes 4.1 inclined inward from top to bottom; the cooperation of the guide post is passed through in the guiding hole to the one end of stopper 2, and the other end cooperation is at the spacing inslot, and when upwards pulling arm-tie, under the inclined hole guiding action of guiding hole 4.1, stopper 2 breaks away from spacing groove 3 for back main part 100 can reciprocate. In addition, in order to allow the pulling plate 4 to always have a tendency to move downward, a restoring assembly is provided between the pulling plate 4 and the backrest main body 100.

The middle part of arm-tie 4 is equipped with opening 4.2, and the lower terminal surface of opening 4.2 is equipped with connecting plate 4.3, and one side that shell body 7 is close to interior casing 1 is equipped with limiting plate 7.1, and limiting plate 7.1 wears to establish in opening 4.2, promptly, and limiting plate 7.1 can reciprocate in opening 4.2, and is equipped with elastic component 8 between limiting plate 7.1's lower extreme and connecting plate 4.3 to form the subassembly that resets. In this embodiment, elastic component 8 is the spring, and simple structure can directly select for use current standard component, practices thrift the cost. Of course, in other embodiments, the elastic member 8 may also be an elastic pad or a rubber bellows.

In addition, for convenience in operation, a window 7.2 communicated with the accommodating cavity is formed in the upper end of the outer shell 7, the upper end of the pull plate 4 is exposed out of the window 7.2, an inner groove 4.4 is formed in the part, exposed out of the window 7.2, of the pull plate 4, and the force application contact area is increased after the inner groove 4.4 is arranged, so that fingers can conveniently stretch into the outer shell for operation.

In this embodiment, as shown in fig. 6, the limiting block 2 is an isosceles trapezoid structure with a small upper side and a large lower side, and the limiting groove 3 is a triangle structure matched with the base angle of the limiting block 2 with a trapezoid structure. In this embodiment, three layers of limiting grooves 3 are formed in the side wall of the open groove 1.1, when the backrest main body 100 moves upward until the limiting block 2 is fitted in the limiting groove 3 on the uppermost layer, the backrest main body 100 can be turned over toward the center of the seat 101 until being accommodated on the base of the seat 101, and when the first layer of limiting groove 3 and the second layer of limiting groove 3 are formed, the backrest main body 100 is rotated, and the lower end of the backrest main body 100 interferes with the top position of the rib 8 on the seat 101, so that the backrest main body cannot be rotated to be accommodated on the base; and, when the backrest main body 100 is in the second gear or third gear locking state, due to the structural characteristics of the stopper 2 itself, the backrest main body 100 is pressed downward, and the backrest main body 100 can move downward under the guiding action of the corresponding inclined surface.

While the above is directed to the preferred embodiment of the present invention, it is not intended that it be limited, except as by the appended claims. The present invention is not limited to the above embodiments, and the specific structure thereof allows for changes, all the changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A backrest height adjustment mechanism, is applicable to children's safety seat for realize children's safety seat backrest height's regulation, its characterized in that includes:

the backrest comprises a backrest main body (100), wherein the lower end of the backrest main body (100) is provided with a mounting hole (100.1);

the upper end of the connecting piece (1) is arranged in the mounting hole (100.1) in a sliding manner along the vertical direction, and the lower end of the connecting piece (1) is connected with the seat;

the limiting assembly is arranged between the connecting piece (1) and the backrest main body (100) and is used for locking the relative position between the connecting piece (1) and the backrest main body (100);

the driving assembly is arranged on the backrest main body (100) and used for driving the connecting piece (1) and the backrest main body (100) to be released from limiting, so that the connecting piece (1) and the backrest main body (100) can move relatively, and the height of the backrest main body (100) is adjusted.

2. The backrest height adjustment mechanism of claim 1, wherein: the limiting assembly comprises a limiting block (2), the limiting block (2) is arranged on the connecting piece (1) or the backrest main body (100) correspondingly, and the backrest main body (100) or the connecting piece (1) is provided with a limiting groove (3) matched with the limiting block (2).

3. The backrest height adjustment mechanism of claim 2, wherein: the driving assembly comprises a pulling plate (4) arranged on the backrest main body (100), an open slot (1.1) is formed in the upper end of the connecting piece (1), the lower end of the pulling plate (4) is arranged in the open slot (1.1) in a sliding mode, a plurality of limiting grooves (1.1) are vertically formed in two side walls of the open slot (1.1), and a guide hole (4.1) which is inclined inwards from top to bottom is formed in the lower end of the pulling plate (4); the one end of stopper (2) is passed through guide post (5) cooperation in guiding hole (4.1), and the other end cooperation is in spacing groove (1.1), when upwards pulling arm-tie (4), under the oblique guide effect of guiding hole (4.1), stopper (2) break away from the spacing groove for the back can reciprocate.

4. The backrest height adjustment mechanism of claim 3, wherein: a reset component is arranged between the pulling plate (4) and the backrest main body (100), so that the pulling plate (4) always has a downward movement trend.

5. The backrest height adjustment mechanism of claim 4, wherein: the backrest main body (100) comprises an inner shell (6) and an outer shell (7), an accommodating cavity used for accommodating the connecting piece (1) is formed between the inner shell (6) and the outer shell (7), and the lower end of the accommodating cavity is opened.

6. The backrest height adjustment mechanism of claim 5, wherein: the middle part of arm-tie (4) is equipped with opening (4.2), the lower terminal surface of opening (4.2) is equipped with connecting plate (4.3), one side that shell body (7) are close to interior casing (6) is equipped with limiting plate (7.1), limiting plate (7.1) wear to establish in opening (4.2), just be equipped with elastic component (8) between the lower extreme of limiting plate (7.1) and connecting plate (4.3), in order to form the subassembly that resets.

7. The backrest height adjustment mechanism of claim 5, wherein: the upper end of the outer shell (7) is provided with a window (7.2) communicated with the accommodating cavity, the upper end of the pull plate (4) is exposed out of the window (7.2), and the part of the pull plate (4) exposed out of the window is provided with an inner groove (4.4).

8. The backrest height adjustment mechanism of claim 3, wherein: the limiting block (2) is of an isosceles trapezoid structure with a small upper side and a large lower side, and the limiting groove (3) is of a triangular structure matched with the base angle of the limiting block (2).

9. A safety seat, characterized by: comprises a backrest main body (100) and a seat (101), wherein the lower end of the backrest main body (100) is rotatably connected with the seat (101), and further comprises a backrest height adjusting mechanism as claimed in any one of claims 3 to 8.

10. A safety seat according to claim 9, wherein: the lateral wall of open slot (1.1) on be equipped with three-layer spacing groove (3), work as back main part (100) up move to stopper (2) when the cooperation is in spacing groove (3) of the superiors, back main part (100) can be towards seat (101) central point and put the upset until accomodating on the base of seat (101).