CN113859066B - child safety seat - Google Patents

Abstract

The invention discloses a child safety seat which is detachably arranged on an automobile seat and comprises a body and a base with a wedge-shaped structure, wherein the thickness of the rear end of the base is larger than that of the front end of the base, an included angle is formed between the upper surface and the lower surface of the base, and the front end of the base is provided with a push rod which extends downwards and is supported on the automobile floor. The body is arranged on the base and can rotate to a forward use state or a backward use state relative to the base, the back of the body is propped against the back of the automobile seat in the forward use state, and the distances between the front edge of the body and the upper surface of the automobile seat in the forward use state and the backward use state are H1 and H2 respectively, and the ratio of H1 to H2 is in the range of 0.4-0.6. The ejector rod is supported on the automobile floor and the wedge-shaped structure of the base, so that stable supports can be formed at the front end and the rear end of the child safety seat, the child safety seat is prevented from being turned over in a backward use state, and the safety is improved; meanwhile, an anti-rebound member is not required to be arranged, so that the structure is simpler, and the operation is more convenient.

Description

child safety seat

Technical field

The present invention relates to the technical field of child safety seats, and in particular to a child safety seat that can prevent overturning.

Background technique

For safety reasons, younger children cannot sit directly in car seats when riding in a car. Instead, they need to install a child safety seat on the car seat. Child safety seats have two installation methods on the car seat: forward-facing use and rear-facing use. When used in the forward-facing direction, the child in the safety seat faces the front of the car; when used in the rear-facing direction, the child in the safety seat faces the car seat. Backrest. When used in the rear-facing state, if the car encounters an accident such as a collision, the safety seat may overturn toward the car seat, causing injury to the child. In order to prevent the safety seat from overturning when used in the rear-facing state, European Patent No. EP00751035B1 discloses a child safety seat with an anti-rebound component. An anti-rebound component is provided under the safety seat, and the anti-rebound component supports Press against the backrest of the car seat to hold the safety seat up and effectively prevent it from tipping over backwards.

However, the safety seat in the forward-facing state does not need to use the anti-rebound component. During the process of adjusting from the rear-facing state to the forward-facing state, the anti-rebound component needs to be folded, which is more inconvenient to operate.

Therefore, in order to improve safety and operational convenience, it is necessary to provide a child safety seat that can prevent overturning without providing an anti-rebound member.

Contents of the invention

An object of the present invention is to provide a child safety seat that can prevent overturning without providing an anti-rebound member.

In order to achieve the above object, the present invention provides a child safety seat, which is detachably installed on a car seat and includes a body and a base with a wedge-shaped structure. The thickness of the rear end of the base is greater than the thickness of the front end. The upper surface of the base There is an included angle with the lower surface, and the front end of the base is provided with a push rod that extends downward and is supported on the car floor. The main body is arranged on the base and can be rotated relative to the base to a forward-facing use state or a rear-facing use state. In the forward-facing use state, the back of the body is against the backrest of the car seat. In the forward-facing use state, The distance between the front edge of the body and the upper surface of the car seat is H1. The distance between the front edge of the body and the upper surface of the car seat in the rear-facing state is H2. The H1 The ratio to H2 is in the range of 0.4-0.6.

Compared with the prior art, the front end of the base of the child safety seat of the present invention is provided with a push rod, and the push rod is supported on the car floor. Keep the collision with the backrest of the car seat, so that supports can be formed at the front and rear ends of the child safety seat respectively, and in the forward use state, there is a gap between the front edge of the body and the upper surface of the car seat. The distance is H1, and the distance between the front edge of the body and the upper surface of the car seat in the rear-facing state is H2. The ratio of H1 to H2 is in the range of 0.4-0.6, making children safe. The seat is more stable during use, effectively preventing the child safety seat from overturning when an accident occurs in the car, and improving the safety of the child safety seat. At the same time, the child safety seat of the present invention does not need to be provided with anti-rebound components, is simpler in structure, and is more convenient to operate.

Preferably, the angle between the upper surface and the lower surface of the base is between 10° and 20°.

Preferably, the angle between the upper surface and the lower surface of the base is 15 degrees.

Preferably, in the rear-facing use state, the front edge of the body conflicts with the backrest of the car seat, thus making the child safety seat more stable when used in the rear-facing direction, effectively preventing an accident in the car. When the child safety seat overturns, the safety of the child safety seat is improved.

Specifically, in the rearward use state, the front edge of the body and the rear end of the base are approximately flush in the vertical direction.

Preferably, the front edge of the body includes two downwardly curved arch structures, and the two arch structures are connected to each other.

Preferably, in the rear-facing state of use, an acute angle is formed between the extension line of the back of the body and the upper surface of the car seat. The body can swing back and forth relative to the base to change the size of the acute angle. The movement of the front edge of the body during the swing process The trajectory is arc-shaped.

Specifically, the size of the acute angle is in the range of 36 degrees to 42 degrees.

Specifically, the front and rear ends of the base are respectively provided with a front chute and a rear chute. The front chute and the rear chute are arc-shaped with both ends tilted. The bottom of the body is provided with a front link and a rear link. The body is carried on the base, and the front link and the rear link are slidably disposed in the front chute and the rear chute respectively.

More specifically, two erected front risers are provided on both sides of the front end of the base, and front chutes are respectively provided on the two front risers. Two erected rear risers are provided on both sides of the rear end of the base. Two rear risers are provided on both sides. There are rear chute respectively on the vertical plate, the two ends of the front link are respectively located in the two front chute, and the two ends of the rear link are respectively located in the two rear chute.

Furthermore, it also includes a locking mechanism provided at the bottom of the body and between the two front vertical plates. The locking mechanism includes an operating part that can slide relative to the body, a snapping part, and a follower fixed to the body. The end of the front link passes through After passing the follower, it extends into the front chute. There are multiple engaging holes arranged side by side on the front vertical plate. When the operating member slides into the body, the engaging member is pushed through the follower and snapped into the engaging holes. When the operating part slides out of the body, the engaging part is pushed away from the engaging hole.

Specifically, the size of H1 is 148mm.

Specifically, H2 is greater than or equal to 265mm.

Preferably, the distance between the front edge of the body and the upper surface of the car seat in the rear-facing state is H2, the distance between the armrest of the body and the upper surface of the car seat is H3, and the ratio of H2 to H3 is 0.6- within the range of 0.8.

Specifically, the sizes of H2 and H3 are 265mm and 375mm respectively.

Description of the drawings

Figure 1 is a perspective view of the child safety seat of the present invention.

Figure 2 is a perspective view of the child safety seat of the present invention in a forward-facing state when installed on a car seat.

Figure 3 is a side view of the child safety seat of the present invention in a forward-facing state when installed on a car seat.

Figure 4 is a perspective view of the child safety seat of the present invention in a rear-facing state when installed on a car seat.

Figure 5 is a side view of the child safety seat of the present invention in a rear-facing state when installed on a car seat.

Figure 6 is a side view of the child safety seat when the supplementary angle of inclination is 42 degrees in the rear-facing state.

Figure 7 is a side view of the child safety seat body in the rear-facing state when the inclination supplementary angle is 40 degrees.

Figure 8 is a side view of the child safety seat when the supplementary angle of inclination is 38 degrees in the rear-facing state.

Figure 9 is a side view of the child safety seat when the supplementary angle of inclination is 36 degrees in the rear-facing state.

Figure 10 is a schematic diagram of the front link and the rear link fixed on the bottom of the body.

Figure 11 is a schematic diagram of the front chute and the rear chute provided on the base.

Figure 12 is a schematic diagram of the installation position of the locking mechanism on the base.

Figure 13 is an exploded view of the locking mechanism.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to Figures 1 to 5, the present invention provides a child safety seat 1, which is detachably installed on a car seat 2 for children to ride on and to provide safety protection for children. The child safety seat 1 includes a base 11 and a body 12 rotatably disposed on the base 11 , and a child rides in the body 12 . After being installed on the car seat 2, the body 12 can be rotated relative to the base 11 to the forward use state shown in Figure 2 or the rearward use state shown in Figure 4. In the forward-facing state of use, the child in the body 12 faces the front of the car, and in the rear-facing state of use, the child in the body 12 faces the backrest 21 of the car seat 2 .

The base 11 has a wedge-shaped structure and the thickness of the rear end is greater than the thickness of the front end. The lower surface of the base 11 is a plane that is roughly parallel to the horizontal direction. There is an included angle α between the upper surface and the lower surface of the base 11. The size of this included angle α is In this embodiment, the value is 15 degrees. The front end of the base 11 is provided with a push rod 13 that extends downward and is supported on the car floor. The push rod 13 can be configured as a telescopic structure so that it can be adjusted according to the height of the car seat 2 and maintain support against the car floor. The rear end of the base 11 is provided with two docking arms 14 extending backward. The docking arms 14 are inserted into the ISOFIX interface (not shown) provided on the car seat 2 to install and lock the child safety seat 1 on the car seat 2 .

The body 12 includes a back plate 121 for children to lean on and side plates 122 fixed on both sides of the back plate 121. The upper edges of the side plates 122 are handrails 123 for children to lean on. The front edge 124 of the body 12 is located between the two side plates 122, and the front edge 124 includes two downwardly curved arch structures 124a, and the two arch structures 124a are connected to each other. In the forward-facing use state, the child's legs can be placed on the two arch structures 124a respectively.

As shown in FIG. 3 , in the forward use state, the body 12 faces forward, and the back surface of the back plate 121 of the body 12 is against the backrest 21 of the car seat 2 . At this time, the front edge 124 of the body 12 is in contact with the upper surface of the car seat 2 . The distance between the surfaces is H1.

As shown in FIG. 5 , in the rearward-facing use state, the body 12 faces backward, and at this time, the front edge 124 is substantially flush with the rear end of the base 11 in the vertical direction. The distance between the front edge 124 and the upper surface of the car seat 2 is H2, and the distance between the armrest 123 and the upper surface of the car seat 2 is H3. Since the base 11 is a wedge-shaped structure with an angle α between the upper and lower surfaces of 15 degrees, the front edge 124 of the body 12 gradually rises during the rotation from the forward use state to the rearward use state, making H2 larger than H1. And when used in the rear-facing state, the front edge 124 conflicts with the backrest 21 of the car seat 2, making the child safety seat 1 more stable when used in the rear-facing direction, effectively preventing the child safety seat 1 from appearing when an accident occurs in the car. The safety of the child safety seat 1 is improved in case of overturning. Since the front edge 124 is a shape formed by connecting two arched structures 124a, the contact area between the front edge 124 and the backrest 21 is large, and there is a large friction force between the two. Compared with the linear front edge 124 , configuring the front edge 124 in a shape formed by connecting two arched structures 124 a is beneficial to increasing the stability of the body 12 when it resists the backrest 21 .

In order to ensure that the main body 12 can bear against the backrest 21 in both forward and backward use states and ensure the safety and comfort of children in the main body 12, the ratio of H1 to H2 is set in the range of 0.4-0.6, and H2 The ratio to H3 is set in the range of 0.6-0.8. Specifically, H2 is greater than or equal to 265mm. Only when H2 meets this numerical requirement can it be ensured that the front edge 124 has sufficient height to conflict with the backrest 21 . In this embodiment, the sizes of H1, H2 and H3 are 148mm, 265mm and 375mm respectively.

Referring to FIGS. 6 to 9 , the body 12 can swing back and forth relative to the base 11 to change the tilt angle. In the rearward-facing use state, an acute angle is formed between the extension line of the back panel 121 of the body 12 and the upper surface of the car seat 2. This acute angle is defined as the inclination supplementary angle β. The smaller the value of the inclination supplementary angle β, the smaller the value of the inclination supplementary angle β, the closer the body 12 is to the car seat 2. The greater the inclination of the base 11. Limit the size of the inclination supplementary angle β to the range of 36 degrees to 42 degrees to ensure that the body 12 will not swing to a large degree of inclination, thereby reducing the risk of the child safety seat 1 overturning without an anti-rebound component. . The sizes of the tilt supplementary angle β shown in Figures 6 to 9 are 42 degrees, 40 degrees, 38 degrees and 36 degrees respectively.

In the backward use state, the motion trajectory of the front edge 124 of the body 12 during the swing process is arc-shaped, so that the front edge 124 always maintains a similar contact distance with the backrest 21 during the motion. Ensure that the front edge 124 acts as an anti-rebound member.

As shown in FIGS. 10 to 12 , the base 11 is provided with an arc-shaped seat 111 extending along the front and rear directions of the child safety seat 1 and with both ends tilted. The body 12 is carried on the arc-shaped seat 111 . Two erected front risers 112 are provided on both sides of the front end of the arc-shaped seat 111, and two erected rear risers 113 are provided on both sides of the rear end of the arc-shaped seat 111. The two front vertical boards 112 are respectively provided with front chute 112a, and the two rear vertical boards 113 are respectively provided with rear chute 113a. Both the front chute 112a and the rear chute 113a are arc-shaped with both ends tilted. The bottom of the body 12 is provided with a front link 125 and a rear link 126. The two ends of the front link 125 are respectively slidably accommodated in the two front slide grooves 112a. The two ends of the rear link 126 are respectively slidably accommodated in the two rear slide grooves. inside the groove 113a. By accommodating the connecting rod at the bottom of the body 12 in the chute on the base 11, the body 12 can slide on the base 11, and when the body 12 swings relative to the base 11, the movement trajectory of the front edge 124 is circular. arc.

With reference to Figures 10 to 13, the child safety seat 1 also includes a locking mechanism 15. The locking mechanism 15 is provided between the body 12 and the base 11 and can lock the body 12 on the base 11 so that the body 12 cannot slide relative to the base 11. Locking After the mechanism 15 is unlocked, the body 12 can slide freely. In this embodiment, the locking mechanism 15 is provided at the bottom of the body 12 and between the two front risers 112 . A plurality of engaging holes 112b are provided side by side on the two front vertical plates 112 for locking by the locking mechanism 15. The plurality of engaging holes 112b arranged side by side are located below the front slide groove 112a. The locking mechanism 15 includes a follower part 151, an operating part 152, two driving parts 153, and two U-shaped engaging parts 154.

The follower 151 is fixed at the bottom of the body 12 and follows the body 12 to slide between the two front vertical plates 112. The follower 151 includes two side portions 151a. Each side portion 151a is provided with an upper through hole 151b and an upper through hole 151b. Two lower through holes 151c below the through hole 151b. Both ends of the front link 125 respectively pass through the upper through holes 151b on the two side portions 151a and then extend into the two front slide grooves 112a. The follower 151 is also provided with two engaging slide grooves 151d located between the two side portions 151a and a protruding guide post 151e located between the two engaging slide grooves 151d. The engaging slide groove 151d extends in the left-right direction of the child safety seat 1 . The two driving members 153 are respectively slidably disposed in the two engaging slide grooves 151d. One end of the driving member 153 away from the corresponding side part 151a is provided with a protruding driving column 153a, and one end of the driving member 153 close to the corresponding side part 151a is provided with a Positioning groove 153b. The middle part of the engaging member 154 is received in the positioning groove 153b of the corresponding driving member 153. The two arms of the engaging member 154 can pass through the two lower through holes 151c on the corresponding side portion 151a and snap into the front stand. into the two engaging holes 112b on the plate 112. After the engaging member 154 is engaged in the engaging hole 112b, the follower 151 is locked on the base 11, so the body 12 cannot slide relative to the base 11.

The operating member 152 is slidably disposed at the bottom of the body 12, and the sliding direction is the front-to-back direction of the child safety seat 1. The operating member 152 is a handle. The rear end of the operating member 152 is provided with a guide groove 152a and a guide groove 152a located on both sides of the guide groove 152a. Two drive chutes 152b. The guide post 151e is located in the guide groove 152a to define the sliding direction of the operating member 152 relative to the body 12 . The two driving chute 152b are respectively located above the two driving members 153, and the driving posts 153a on the inner sides of the two driving members 153 respectively extend into the two driving chute 152b. When the operating member 152 slides into the body 12, the cooperation between the driving chute 152b and the driving column 153a drives the two driving members 153 to slide outward, thereby driving the two engaging members 154 to pass through the side portions 151a respectively and snap into the engaging holes. 112b, locking is achieved; when the operating member 152 slides outward of the body 12, the two driving members 153 are driven to slide inward, thereby driving the engaging member 154 to retract inward and disengage from the engaging hole 112b, thereby achieving unlocking. After unlocking, the main body 12 and the locking mechanism 15 slide relative to the base 11 together. After sliding to a certain angle, the position of the engaging member 154 is opposite to the other engaging hole 112b, and the engaging member 154 is re-engaged and locked when the operating member 152 slides inward.

The locking mechanism 15 also includes a first return spring 155 and two second return springs 156 . The operating member 152 is provided with a raised positioning post 152c. The first return spring 155 is a tension spring, and both ends of the first return spring 155 are respectively hooked on the guide post 151e and the positioning post 152c. The first return spring 155 is inward. Pulling the operating member 152 keeps the locking mechanism 15 in the locked state. Two second return springs 156 are respectively disposed between the two driving members 153 and the follower member 151. The second return springs 156 push the driving member 153 outward to keep the engaging member 154 locked in the engaging hole 112b.

Compared with the prior art, the present invention is equipped with a push rod 13 at the front end of the base 11 of the child safety seat 1, and the push rod 13 is supported on the car floor. The child safety seat 1 remains in contact with the backrest 21 of the car seat 2 in both the downward and rearward use states, so that support can be formed at the front and rear ends of the child safety seat 1, and the front edge of the body in the forward use state The distance between the body and the upper surface of the car seat is H1. The distance between the front edge of the body and the upper surface of the car seat in the rear-facing state is H2. The ratio of H1 to H2 In the range of 0.4-0.6, the child safety seat 1 is more stable during use, effectively preventing the child safety seat 1 from overturning during driving, and improving the safety of the child safety seat 1. At the same time, the child safety seat 1 of the present invention does not need to be provided with anti-rebound components, is simpler in structure, and is more convenient to operate.

What is disclosed above is only a preferred example of the present invention. Its function is to facilitate those skilled in the art to understand and implement it. Of course, it cannot be used to limit the scope of the present invention. Therefore, the patent application scope of the present invention is based on the scope of the present invention. Equivalent changes still fall within the scope of the present invention.

Claims (15)

1. A child safety seat, detachably installed on a car seat, characterized in that: it includes a body and a base with a wedge-shaped structure, the thickness of the rear end of the base is greater than the thickness of the front end, and the upper surface of the base is in contact with the front end. There is an included angle between the lower surfaces, the base is installed behind the car seat, the rear end of the base is against the backrest of the car seat, and the front end of the base is provided with a downwardly extending The push rod supported on the car floor, The body is disposed on the base and can be rotated relative to the base to a forward use state or a rearward use state. In the forward use state, the back side of the body is against the car seat. back, The distance between the front edge of the body and the upper surface of the car seat in the forward-facing use state is H1, and the distance between the front edge of the body and the upper surface of the car seat in the rear-facing use state is H1. The distance between them is H2, and the ratio of H1 to H2 is in the range of 0.4-0.6. 2. The child safety seat according to claim 1, wherein the angle between the upper surface and the lower surface of the base is between 10° and 20°. 3. The child safety seat according to claim 1, wherein the angle between the upper surface and the lower surface of the base is 15 degrees. 4. The child safety seat according to claim 1, characterized in that in the rearward-facing use state, the front edge of the body conflicts with the backrest of the car seat. 5. The child safety seat according to any one of claims 1 to 4, characterized in that: in the backward-facing use state, the front edge of the body and the rear end of the base are approximately in the vertical direction. Flush. 6. The child safety seat according to claim 1, wherein the front edge of the body includes two downwardly curved arch structures, and the two arch structures are connected to each other. 7. The child safety seat according to claim 1, wherein in the rear-facing use state, an acute angle is formed between the extension line of the back of the body and the upper surface of the car seat. The body can swing back and forth relative to the base to change the size of the acute angle, and the motion trajectory of the front edge of the body during the swing process is arc-shaped. 8. The child safety seat according to claim 7, wherein the acute angle ranges from 36 degrees to 42 degrees. 9. The child safety seat according to claim 7, characterized in that: the front end and the rear end of the base are respectively provided with a front chute and a rear chute, and the front chute and the rear chute are both ends. A tilted arc, the bottom of the body is provided with a front link and a rear link, the body is carried on the base, and the front link and the rear link are respectively slidably arranged on the front chute. with the rear chute. 10. The child safety seat according to claim 9, characterized in that: two erected front vertical boards are respectively provided on both sides of the front end of the base, and the front sliding boards are respectively provided on the two front vertical boards. groove, two erected rear vertical plates are respectively provided on both sides of the rear end of the base, and the rear chute is respectively provided on the two rear vertical plates. The two ends of the front connecting rod are respectively located on the two front In the chute, the two ends of the rear connecting rod are respectively located in the two rear chute. 11. The child safety seat according to claim 10, further comprising a locking mechanism disposed at the bottom of the body and between the two front risers, the locking mechanism including a locking mechanism capable of moving relative to the body. The sliding operating part, the engaging part and the follower fixed to the body. The end of the front link passes through the follower and then extends into the front chute. The front risers are arranged side by side. A plurality of engaging holes are provided. When the operating member slides into the body, the engaging member is pushed through the follower and snapped into the engaging holes. The operating member moves toward the body. When the main body slides outward, the engaging piece is pushed away from the engaging hole. 12. The child safety seat according to claim 1, wherein the size of H1 is 148mm. 13. The child safety seat according to claim 1, wherein the H2 is greater than or equal to 265 mm. 14. The child safety seat according to claim 1, wherein the distance between the front edge of the body and the upper surface of the car seat in the rear-facing state is H2, and the distance between the front edge of the body and the upper surface of the car seat is H2. The distance between the armrest and the upper surface of the car seat is H3, and the ratio of H2 to H3 is in the range of 0.6-0.8. 15. The child safety seat according to claim 14, wherein the sizes of H2 and H3 are 265mm and 375mm respectively.