Raising mechanism and child safety seat therewith

A raising mechanism is adapted for a child safety seat. The child safety seat includes a base and a backrest disposed on the base. The raising mechanism includes a front raising block, a rear raising block, and a driving member. A front end of the front raising block is connected to the base. A rear raising block is connected to the front raising block. The front raising block and the rear raising block form a seating portion cooperatively. The driving member is movably disposed on the base or the backrest. The driving member drives the front raising block and the rear raising block to raise the seating portion. Therefore, the raising mechanism improves sitting comfort and safety and has advantages of simple structure, low manufacturing cost, and easy operation.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a carrier, and more particularly, to a raising mechanism and a child safety seat therewith.

2. Description of the Prior Art

With development of the society, the economy, and the technology, there are more and more consumer products which facilitate people's daily life, such as child safety seats. Since child safety seats are not only comfortable to sit but also ensure children's safety, the child safety seats become more and more popular.

In the current market, there is a conventional child safety seat which is integrated and not capable of being adjusted. Since a height and a size of the integrated conventional child safety seat are not adjustable, the integrated conventional child safety seat is not suitable for children with different heights, which affects sitting comfort and safety.

There is another conventional child safety seat including an adjusting mechanism and capable of being adjusted according to a height of a child. However, the adjusting mechanism has disadvantages of complicated and unreliable structure, difficult operation, and high manufacturing cost.

Furthermore, when a younger or shorter child sits on a conventional child safety seat, it is easy to harm the younger child's skeleton, especially spine. Therefore, in many countries, when a child at 0 to 6 months of age sits on a child safety seat, it is required to raise his/her back above his/her hip. However, most of the conventional child safety seat cannot satisfy the aforementioned requirement and fails to ensure the child's safety.

Therefore, there is a need to design a raising mechanism and a child safety seat therewith to overcome the problems.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned drawbacks, the present invention aims at providing a raising mechanism and a child safety seat therewith which are capable of raising a child to a desired position according to a height of the child.

According to the claimed invention, a raising mechanism adapted for a child safety seat is disclosed. The child safety seat includes a base and a backrest disposed on the base. The raising mechanism includes a front raising block, a rear raising block, and a driving member. A front end of the front raising block is connected to the base. A rear raising block is connected to the front raising block. The front raising block and the rear raising block form a seating portion cooperatively. The driving member is movably disposed on the base or the backrest. The driving member drives the front raising block and the rear raising block to raise the seating portion.

Preferably, the child safety seat further includes a headrest slidably disposed on the backrest along a vertical direction of the backrest. The driving member is slidably disposed on the backrest along the vertical direction of the backrest, and the headrest engages the driving member to drive the front raising block and the rear raising block to raise the seating portion.

Preferably, when the headrest is adjusted to be located at a lowest position, the headrest pushes the driving member to drive the front raising block and the rear raising block to raise the seating portion to a highest position.

Preferably, the raising mechanism further includes at least two engaging portions disposed on the backrest along the vertical direction of the backrest, and the headrest selectively engages with one of the at least two engaging portions.

Preferably, the raising mechanism further includes a pushing portion disposed on a lower end of the headrest and a pushed portion disposed on an end of the driving member near the headrest, and the pushing portion abuts against the pushed portion.

Preferably, a restraining and guiding slot is formed on the driving member along a longitudinal direction, the raising mechanism further comprises a restraining and guiding rod disposed on the backrest and passing through the restraining and guiding slot.

Preferably, the raising mechanism further includes a first resilient member connected between the driving member and the backrest. The first resilient member biases the driving member to slide toward the headrest.

Preferably, the raising mechanism further includes a first pivoting shaft. The front end of the front raising block is pivoted to the base by the first pivoting shaft.

Preferably, the first pivoting shaft is disposed along a horizontal direction of the base.

Preferably, the raising mechanism further includes a second pivoting shaft. A rear end of the front raising block is pivoted to a front end of the rear raising block by the second pivoting shaft.

Preferably, the second pivoting shaft is disposed along a horizontal direction of the base.

Preferably, the raising mechanism further includes a linking member. An end of the linking member is pivoted to the second pivoting shaft. The other end of the linking member is pivoted to the driving member. The driving member is disposed on the backrest along a vertical direction of the backrest, and the driving member raises the front raising block and the rear raising block by the linking member.

Preferably, the raising mechanism further includes a second resilient member connected between the linking member and the driving member. The second resilient member biases the linking member to drive the second pivoting shaft to move toward the base.

According to the claimed invention, a child safety seat includes a base, a backrest, and a raising mechanism. The backrest is disposed on the base. The raising mechanism includes a front raising block, a rear raising block, and two driving members. A front end of the front raising block is connected to the base. The rear raising block is connected to the front raising block. The front raising block and the rear raising block form a seating portion cooperatively. The two driving members are movably disposed on the base or the backrest. The two driving members drive the front raising block and the rear raising block to raise the seating portion.

Preferably, the child safety seat further includes a pair of guiding tracks. The pair of guiding tracks is disposed on the backrest along a vertical direction of the backrest. A rear end of the rear raising block is located between the pair of guiding tracks.

Preferably, the two driving members are slidably disposed in the pair of guiding tracks respectively.

In summary, the raising mechanism of the present invention utilizes the driving member for raising the front raising block and the rear raising block, so as to raise a child sitting on the seating portion to a desired position according to a height of the child, which improves sitting comfort and safety. Furthermore, the raising mechanism and the child safety seat of the present invention have advantages of simple structure, low manufacturing cost, and easy operation.

DETAILED DESCRIPTION

Please refer toFIG. 1toFIG. 7.FIG. 1is a front view of a child safety seat100according to an embodiment of the present invention.FIG. 2is an enlarged diagram of an A portion of the child safety seat100shown inFIG. 1according to the embodiment of the present invention.FIG. 3is a lateral view of the child safety seat100without illustrating a backrest30and abase20as a front raising block11and a rear raising block12are located at lowest positions according to the embodiment of the present invention.FIG. 4is a schematic diagram of the child safety seat100shown inFIG. 3according to the embodiment of the present invention.FIG. 5is a schematic diagram of the child safety seat100without illustrating the backrest30and the base20as the front raising block11and the rear raising block12are located at highest positions according to the embodiment of the present invention.FIG. 6is a lateral view of the child safety seat100shown inFIG. 5according to the embodiment of the present invention.FIG. 7is a schematic diagram of the child safety seat100shown inFIG. 5without illustrating the backrest30, the base20and one guiding track35according to the embodiment of the present invention.

The child safety seat100includes the base20, a raising mechanism10, the backrest30, and a headrest40, a pair of guiding tracks35. The backrest30is disposed on the base20. Preferably, the backrest30is disposed on the base20along a vertical direction. The headrest40is slidably disposed on the backrest30along a vertical direction of the backrest30. The pair of guiding tracks35are disposed on the backrest30along the vertical direction of the backrest30, i.e., the pair of guiding tracks35are parallel to each other. At least two engaging portions32are formed on each of the pair of guiding tracks35, and two engaging members42are disposed on the headrest40and corresponding to the two rows of engaging portions32. The two engaging members42selectively engage with the two corresponding engaging portions32for adjusting a position of the headrest40relative to the backrest30, which makes structure more reasonable and compact.

The raising mechanism10includes two driving members13, the front raising block11, and the rear raising block12. The front raising block11and the rear raising block12are connected to each other to form a seating portion50cooperatively for a child to sit. A front end of the front raising block11is connected to the base20. The front raising block11is pivoted to the rear raising block12. A rear end of the rear raising block12is connected to the backrest30. The two driving members13are movably disposed on the base20or the backrest30. In this embodiment, the two driving members13are preferably slidably disposed in the pair of guiding tracks35. Preferably, two receiving slots351are formed on the pair of guiding tracks35for slidably receiving the two driving members13, which makes structure more reasonable, compact, and reliable. The headrest40engages the two driving members13to drive the front raising block11and the rear raising block12to raise the seating portion50. That is, the two driving members13raise the front raising block11and the rear raising block12along a direction away from the base20, so as to raise a child who sits on the seating portion50to a desired position according to a height of the child, which improves comfort and safety of the children.

Furthermore, two pushing portions41are disposed on a lower end of the headrest40. Two pushed portions131are disposed on ends of the two driving members13near the headrest40. When the headrest40is adjusted to a lowest position relative to the backrest30, the pushing portions41on the lower end of the headrest40push the two pushed portions131on the two driving members13to drive the front raising block11and the rear raising block12to raise the seating portion50to a highest position relative to the base20. That is, when the headrest40is adjusted according to a height of a child, the two pushing portions41abut against and push the two pushed portions131, such that the two driving members13are driven to raise the front raising block11and the rear raising block12for raising the child's back simultaneously, which provides a better protection for the child's skeleton.

More specifically, two restraining and guiding slots132are formed on the two driving members13along longitudinal directions of the two driving members13. Two restraining and guiding rods34are fixedly connected to a wall of each of the two receiving slots351and slidably passing through the corresponding restraining and guiding slots132. The four restraining and guiding rods34slidably cooperate with the two restraining and guiding slots132, so as to make sliding movements of the two driving members13smoother and more reliable and to make structure more reasonable and compact. Furthermore, it also prevents the two driving members13from disengaging from the pair of guiding tracks35. Besides, in this embodiment, both of the two pushing portions41and the two pushed portions131are received in the two receiving slots351of the pair of guiding tracks35, which reduces an occupied space and makes structure more reasonable, compact and reliable.

Furthermore, the raising mechanism10of the present invention further includes two first resilient members18connected between the two driving members13and the backrest30. The two first resilient members18bias the two driving members13to slide toward the headrest40. Specifically, in this embodiment, each of the two first resilient members18is preferably a tensional spring and extendedly connected between a third pivoting shaft16and the restraining and guiding rod34near the third pivoting shaft16, such that the two first resilient members18are connected between the two driving members13and the backrest30. That is, when the headrest40is adjusted to slide relative to backrest30upwardly, the two pushing portions41depart from the two pushed portions131, and the two first resilient members18drive the two driving members13to slide toward the headrest40to automatically return, which is convenient in use.

Furthermore, the front end of the front raising block11is pivoted to the base20by two first pivoting shafts14, such that the front end of the front raising block11is connected to the base20, which makes structure more reasonable and compact. Preferably, the two first pivoting shafts14are disposed along a horizontal direction of the base20, which makes connecting structure between the front end of the front raising block11and the base20more reasonable and compact. Preferably, the two first pivoting shafts14are integrally formed with the front end of the front raising block11, and ends of the two first pivoting shafts14away from the front raising block11are pivoted to the base20, which makes pivoting structure between the front end of the front raising block11and the base20more reasonable and compact and simplifies procedures of manufacturing and assembly. However, the pivoting structure between the front end of the front raising block11and the base20is not limited to thereto, and it depends on actual demands.

Furthermore, in this embodiment, the rear end of the rear raising block12is slidably and pivotally connected to the backrest30, such that the rear end of the rear raising block12is connected to the backrest30. Preferably, the rear end of the rear raising block12is slidably disposed on the backrest30along the vertical direction of the backrest30, which makes connecting structure between the rear end of the rear raising block12and the backrest30reasonable and compact and is capable of adjusting an included angle between the rear raising block12and the backrest30easily. Specifically, the rear end of the rear raising block12is located between the pair of guiding tracks35. Particularly, two sliding portions121are disposed on the rear end of the rear raising block12and slidably disposed between the pair of guiding tracks35located at a left side and a right side of the backrest30, such that the rear end of the rear raising block12is slidably and partially detachably connected to the backrest30by the two sliding portions121. Particularly, the two sliding portions121are formed by two protruding blocks extending from a left side and a right side of the rear end of the rear raising block12toward the backrest30and stretching between the pair of guiding tracks35located at the left side and the right side of the backrest30, which prevents a displacement of the rear raising block12along the horizontal direction and makes sliding movement of the sliding portion121smoother and more reliable.

Furthermore, the rear end of the front raising block11and the front end of the rear raising block12are pivoted to each other by two second pivoting shafts15, such that the rear end of the front raising block11is connected to the front end of the rear raising block12. Preferably, the two second pivoting shafts15are disposed along the horizontal direction of the base20and parallel to the two first pivoting shafts14. Specifically, two first pivoting sockets111are formed on the rear end of the front raising block11for allowing the two second pivoting shafts15to pivot. Two second pivoting sockets122are formed on the front end of the rear raising block12for allowing the two second pivoting shafts15to pivot, which makes structure more reasonable and rotation smoother.

Furthermore, the raising block10further includes two linking members17. Specifically, ends of the two linking members17are pivoted to the two second pivoting shafts15. The other ends of the two linking members17are pivoted to the two driving members13. The two driving members13raise the front raising block11and the rear raising block12by the two linking members17, which makes structure more reasonable and compact. Particularly, two third pivoting sockets171are formed on the ends of the two linking members17near the two second pivoting shafts15for allowing the two second pivoting shafts15to pivot. Two fourth pivoting sockets172are formed on the other ends of the two linking members17away from the two second pivoting shafts15. Two fifth pivoting sockets133are formed on ends of the two driving members13near the two linking members17. The two fourth pivoting sockets172and the two fifth pivoting sockets133are pivoted to each other by the two third pivoting shafts16, which makes structure more reasonable and compact.

Preferably, the raising mechanism10of the present invention further includes two second resilient members19connected between the two linking member17and the two driving members13. The two second resilient members19bias the two linking members17to drive the two second pivoting shafts15to move toward the base20. Specifically, in this embodiment, the two second resilient members19can be preferably torsional springs, and middle portions of the two second resilient members19sheathe on the two third pivoting shafts16. Ends of the two second resilient members19abut against walls of the two linking members17. The other ends of the two second resilient members19abut against walls of the two driving members13. Since the two second resilient members19are connected between the two linking members17and the two driving member13and bias the two linking members17to drive the two second pivoting shafts15to move toward the base20, it is easy to return the front raising block11, which make operation more convenient.

Operational principle and process of the raising mechanism10of the present invention are described hereinafter. As shown inFIG. 3andFIG. 4, the headrest40is positioned at the highest position of the headrest40relative to the backrest30. At the same time, the front raising block11and the rear raising block12are located at the lowest positions relative to the base20, i.e., a child sitting on the seating portion50is at the lowest position relative to the base20. When the child safety seat100is adapted for a younger or a shorter child, it is required to adjust the headrest40to the lowest position relative to the backrest30and raise the younger or shorter child who sits on the seating portion50. The two engaging members42are to be operated to disengage from the two highest engaging portions32for allowing the headrest40to slide relative to the backrest30downwardly. When the headrest40moves to the lowest position relative to the backrest30, the two pushing portions41on the lower ends of the headrest40push the two pushed portions131on the upper ends of the two driving members13, such that the two driving members13overcomes first resilient forces generated by the two first resilient members18to move relative to the backrest30downwardly. The two linking members17are pushed by the two driving members13, such that the two linking members17overcome second resilient forces generated by the two second resilient members19to pivot for compressing the two second resilient members19. The two second pivoting shafts15move away from the base20for increasing an included angle between the front raising block11and the base20and the included angle between the rear raising block12and the backrest30, which raises the front raising block11and the rear raising block12. Afterward, the two engaging members42are to be operated to engage with the lowest two engaging portions32for locking the headrest40relative the backrest30. The two pushing portions41push the two pushed portions131for restraining the two driving members13to slide relative to the backrest30upwardly, such that heights of the two second pivoting shafts15supported by the two linking members17and heights of the front raising block11and the rear raising block12are maintained, which achieves operation of raising a sitting height of the younger child who sits on the seating portion50. As shown inFIG. 5toFIG. 7, when the headrest40is adjusted to the lowest position relative to the backrest30, the front raising block11and the rear raising block12are adjusted to the highest position relative to the base20simultaneously for raising a child who sits on the seating portion50.

As shown inFIG. 5toFIG. 7, when the child safety seat100is adapted for an elder or taller child, the two engaging members42are to be operated to disengage from the two corresponding engaging portions32for allowing the headrest40to slide relative to the backrest30upwardly. The two pushing portions41on the lower end of the headrest40slides upwardly simultaneously. The two driving members13are driven to slide relative to the backrest30upwardly by the first resilient forces generated by the two first resilient members18, such that the two pushed portions131and the two pushing portions41disengage from each other when the rear raising block12returns. At the same time, the two second resilient members19drive the two linking members17to pivot reversely for driving the two second pivoting shafts15to move toward the base20, which reduces the included angle between the front raising block11and the base20and the included angle between the rear raising block12and the backrest30and lowers the front raising block11and the rear raising block12. When the headrest40is adjusted to a desired position, the front raising block11and the rear raising block12return to the lowest positions relative to the base20. Afterward, the two engaging members42are to be operated to engage with another two engaging portions32for locking the position of the headrest40relative to the backrest30. Furthermore, since the two restraining and guiding rods34abut against walls of the restraining and guiding slot132, the two driving members13cannot continue sliding relative to the backrest30upwardly, which limits sliding displacements of the two driving members13. Therefore, even if the two pushing portions41disengage from the two pushed portions131, the two driving members13still can be restrained from sliding upwardly, such that the heights of the two second pivoting shafts15supported by the two linking members17are maintained for keeping the front raising block11and the rear raising block12at the lowest positions relative to the base20. As shown inFIG. 3andFIG. 4, when the headrest40is adjusted to a desired position except the lowest position relative to the backrest30, the front raising block11and the rear raising block12are located at the lowest positions relative to the base20, i.e., a child sits on the seating portion50at the lowest position as shown inFIG. 3.

In contrast to the prior art, the raising mechanism of the present invention utilizes the driving member for raising the front raising block and the rear raising block, so as to raise a child sitting on the seating portion to a desired position according to a height of the child, which improves comfort and safety of the children. Furthermore, the raising mechanism and the child safety seat of the present invention have advantages of simple structure, low manufacturing cost, and easy operation.