CN215663067U - Adjustable headrest for child safety seat - Google Patents

Abstract

The utility model provides an adjustable head rest for children's safety seat sets up on the seat body, including adjusting stop gear, it includes handle subassembly and spacing locking Assembly to adjust stop gear, handle subassembly includes the handle, install the handle drive head rest at head rest rear side for pedestal body up-and-down motion, the handle is equipped with little boss and big boss, little boss and big boss all set up on the orbit of spacing locking Assembly, drive little boss or big boss motion when the handle arrives spacing locking Assembly jack-up spacing locking Assembly during position to adjust the position that the head leaned on the seat body. The headrest adjusting mechanism can automatically switch the restraint fixing system of the child according to the height or the weight of the child, when the height of the child is smaller than 105CM or the weight of the child is below 18KG, when the height of the child is 105CM-150CM or the weight of the child is 18KG-36KG, the headrest is automatically switched to the 3-point type safety belt fixing system without dismounting the 5-point type safety belt and only needing to be heightened.

Description

Adjustable headrest for child safety seat

Technical Field

The utility model belongs to the technical field of child safety seats, and particularly relates to an adjustable headrest for a child safety seat.

Background

The child safety seat generally defined is classified into groups 0/0+/1/2/3, which represent the weight of a child on which the child safety seat may be seated, and group 0/0+/1, which requires the use of a 5-point harness system. The so-called five-point safety belt is fixed on the buckle between the two legs through two shoulders and buttocks. The harness fits snugly against the pelvis (hip and hip harness), shoulders and chest (shoulder harness), the most common child safety protection system for child safety seats. However, a child who is relatively slightly larger may use the 2/3 group, which eliminates the need for a 5-point harness system, and instead uses a 3-point harness system for a vehicle.

That is, when the child is growing and does not need to use the 5-point harness system, the child seat needs to manually remove the 5-point harness system for use with group 2/3. Manual removal or assembly of critical harness systems may be a risk and may affect the safety of the child safety seat.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the adjustable headrest for the child safety seat, which can automatically switch the restraint fixing system of the child according to the height or the weight of the child, does not need to remove a 5-point safety belt, only needs to heighten the headrest, and automatically switches the headrest into a 3-point safety belt fixing system.

The utility model is realized by the following technical scheme:

the utility model provides an adjustable head rest for children's safety seat sets up on the seat body, including adjusting stop gear, it includes handle subassembly and spacing locking Assembly to adjust stop gear, handle subassembly includes the handle, install the handle drive head rest at head rest rear side for pedestal body up-and-down motion, the handle is equipped with little boss and big boss, little boss and big boss all set up on the orbit of spacing locking Assembly, drive little boss or big boss motion when the handle arrives spacing locking Assembly jack-up spacing locking Assembly during position to adjust the position that the head leaned on the seat body.

Further, big boss sets up the back both sides edge at the handle, spacing locking Assembly includes head rest fixed rod, fixed rod locating part and fixed rod pressure spring, the fixed rod locating part sets up in the lower part both sides of spacing locking Assembly, and the afterbody of the fixed rod locating part of head rest fixed rod the fixed rod pressure spring sets up the rear side of head rest fixed rod, the back of seat body is equipped with back gear, big boss sets up on the motion trail of fixed rod locating part, the fixed rod of head rest is in the gear of back, thereby drives big boss and moves fixed rod locating part jack-up promotion head rest fixed rod ejecting back gear when the handle.

Further, spacing locking piece and locking piece pressure spring are equipped with at the central line top of spacing locking subassembly, the central line position on seat body back top is from last to being equipped with spacing piece and the last spacing recess in back down in proper order, spacing piece, the last spacing recess all on the motion trail of spacing locking subassembly in back, work as spacing locking piece upward movement is until falling into in the spacing recess in the back, spacing locking subassembly is blocked by spacing piece in the back, the headrest fixed rod is spacing can not continue upwards to adjust the gear.

Furthermore, little boss sets up the back central line position at the handle, little boss is on the motion trail of spacing locking piece, works as spacing locking piece falls into back spacing recess back, if little boss moves when spacing recess coincidence position, little boss passes spacing recess and with spacing locking piece jack-up to spacing locking subassembly can drive the fixed stick of head rest and adjust the gear downwards.

Further, spacing locking subassembly still includes spacing mounting, spacing mounting includes the spacing mounting top that upper portion set up to and the spacing mounting flank that the lower part bilateral symmetry set up, spacing locking piece and locking piece pressure spring set up in spacing mounting top, and the spacing mounting flank department at both sides is installed to the fixed excellent locating part, the tail end of spacing mounting lower part is equipped with the fixed excellent through hole, the head rest fixed stick is spacing at the downthehole back-and-forth movement of fixed excellent through hole.

Further, the front bilateral symmetry of seat body is equipped with adjustable preceding gear, handle subassembly still includes preceding gear mounting, the one end tip of preceding gear mounting is equipped with down the gear mounting arch, the bottom of handle is equipped with the spacing chute of the splayed that falls, the protruding setting of gear mounting is spacing activity in spacing chute down, and it is protruding to drive down the gear mounting through spacing chute to the gear mounting transfers shelves before driving between the gear.

Furthermore, the handle assembly further comprises a handle pressure spring, a handle pressure spring base is arranged on the front face of the handle, a handle pressure spring ejecting seat is arranged on the back face of the headrest, and the handle pressure spring is always clamped between the handle pressure spring ejecting seat and the handle pressure spring base.

Further, handle subassembly still includes the handle, the piece together about handle and handle, handle unit mount is in the head rest rear side, the positive middle part of seat body is from last to being equipped with the direction spout down, and the head rest drives handle subassembly and installs in the seat body along the direction spout of seat body, and pulling handle, handle subassembly can drive the head rest and slide from top to bottom.

Furthermore, a shoulder belt is arranged on the child safety seat, and one end of the shoulder belt is arranged at two ends of the headrest fixing rod.

The utility model has the beneficial effects that:

the utility model discloses an adjustable headrest for a child safety seat, which can automatically switch a restraint fixing system of a child according to the height or weight of the child, when the height of the child is less than 105CM or the weight of the child is below 18KG, namely in the range of 0/1 groups, the restraint fixing system can be automatically switched to a 5-point safety belt fixing system only by lowering the headrest position, when the height of the child is 105CM-150CM or the weight of the child is 18KG-36KG, namely in the range of 2/3 groups of the child, the restraint fixing system does not need to be switched to a 3-point safety belt fixing system only by raising the headrest, and the restraint fixing system can be used without manually removing the 5-point safety belt system like the traditional child seat.

That is, when the shoulder height of the seat reaches the range of group 2/3, the car three-point seatbelt system can be used while the five-point seatbelt system is maintained at the highest position of group 1, thereby expanding the range of use for installing the 5-point seatbelt system child safety seat, and making the child safety seat seatbelt system safer and more convenient since the shoulder belt does not have to be removed.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a cross-sectional view of the seat body of the present invention;

FIG. 3 is a rear side view of the headrest of the present invention;

FIG. 4 is a schematic view of the back structure of the pull handle of the present invention;

FIG. 5 is a schematic view of the handle assembly and the positive lock assembly of the present invention;

FIG. 6 is a schematic structural view of a positive lock assembly of the present invention;

FIG. 7 is a schematic view of the engagement of the positive lock assembly of the present invention with a pull handle;

FIG. 8 is a schematic view of the internal structure of the positive lock assembly of the present invention;

FIG. 9 is a schematic view of the engagement of the positive lock assembly of the present invention with the seat body;

FIG. 10 is a detailed view of the position engagement of the positive locking assembly with the large and small bosses when the headrest of the present invention is at the lowest position;

FIG. 11 is a detailed view of the position matching between the limit locking assembly and the large and small bosses when the headrest fixing rod leaves the rear gear;

FIG. 12 is a detailed view of the position fit of the positive locking assembly with the large and small bosses when the headrest of the present invention is in the locked state at group 1 position;

FIG. 13 is a detailed view of the position engagement of the position locking assembly with the large and small bosses when the headrest of the present invention is further moved upward from group 1;

FIG. 14 is a detailed view of the position engagement of the positive locking assembly with the large and small bosses when the headrest of the present invention is in the highest position;

wherein: 1. a seat body; 1-1, a guide chute; 1-2, front upper gear; 1-3, front lower gear; 1-4, rear gear; 1-5, a rear plane of the body; 1-6, a rear upper limit block; 1-7, and then limiting the groove; 2. a headrest; 2-1, pulling a pressure spring top seat; 3. a handle assembly; 3-1, a handle; 3-2, a handle; 3-2-1, small boss; 3-2-2, large boss; 3-2-3, a limiting chute; 3-3, pulling a pressure spring; 3-4, a front gear fixing piece; 3-4-1, a lower gear fixing piece is raised; 3-5, a handle pressure spring base; 4. a limit locking assembly; 4-1, limiting and fixing parts; 4-1-1, and the top end of the limiting fixing piece; 4-1-2, 4-1-3 side wings of the limiting fixing piece and through holes of the fixing rods; 4-2, a headrest fixing rod; 4-3, fixing rod limiting piece; 4-4, fixing a rod pressure spring; 4-5, limiting lock blocks; 4-6, and a locking block pressure spring.

Detailed Description

The preferred mechanisms and methods of motion realization of the present invention are further described below in conjunction with the figures and the detailed description.

As shown in fig. 1 to 14, an adjustable headrest for a child safety seat comprises a seat body 1, a headrest 2 and an adjusting and limiting mechanism, wherein the headrest 2 is arranged on the seat body 1, and the adjusting and limiting mechanism is used for adjusting and limiting the position of the headrest 2 on the seat body 1.

The middle part of the front surface of the seat body 1 is provided with a guide chute 1-1 from top to bottom, the two sides of the guide chute 1-1 are symmetrically provided with adjustable front gears, and each front gear comprises a front upper gear 1-2 arranged at the upper part and a front lower gear 1-3 arranged at the lower part and is used for adjusting the position of the headrest 2 at the front side of the seat body 1.

The middle of the back of the seat body 1 is a body rear plane 1-5, rear gears 1-4 corresponding to front upper gears 1-2 on the front side are symmetrically arranged on two sides of the back, hollowing is arranged between the rear gears 1-4 and the body rear plane 1-5, so that 2 shoulder straps can be conveniently threaded on a headrest fixing rod 4-2 of the limiting and locking assembly 4, rear upper limiting blocks 1-6 are arranged at the middle line position of the top end of the body rear plane 1-5, and rear upper limiting grooves 1-7 are arranged on the lower sides of the corresponding rear upper limiting blocks 1-6.

The shoulder belt here is the 2 belts at the shoulder of the 5-point harness system.

The adjusting and limiting mechanism comprises a handle component 3 and a limiting and locking component 4, wherein the handle component 3 is mainly used for adjusting the height position of the headrest, and the limiting and locking component 4 is mainly used for fixing the shoulder belt and fixing the position of the headrest 2.

The handle assembly 3 comprises a handle 3-1, a handle 3-2, a handle pressure spring 3-3 and a front gear fixing piece 3-4.

The handle 3-1 and the handle 3-2 are vertically assembled together, the handle component 3 is installed at the rear side of the headrest 2, after the installation, the headrest 2 is installed in the seat body 1 along the guide chute 1-1 of the seat body 1, and the handle 3-1 is pulled, and the handle component 3 can drive the headrest 2 to slide vertically.

The front side of the handle 3-2 is provided with a handle pressure spring base 3-5, the back side of the headrest 2 is provided with a handle pressure spring footstock 2-1, the handle pressure spring 3-3 is always clamped between the handle pressure spring footstock 2-1 and the handle pressure spring base 3-5, the handle pressure spring 3-3 always has a downward pressure on the handle 3-2, and the headrest 2 can be pulled to move upwards by the upward pulling force exerted on the handle 3-1 which needs to overcome the downward pressure of the handle pressure spring 3-3.

The bottom of the handle 3-2 is provided with an inverted splayed limiting chute 3-2-3, one end of the front gear fixing piece 3-4 is provided with a lower gear fixing piece bulge 3-4-1, the lower gear fixing piece bulge 3-4-1 is arranged in the limiting chute 3-2-3 for limiting movement, and the lower gear fixing piece bulge 3-4-1 is driven by the limiting chute 3-2-3, so that the front gear fixing piece 3-4 is driven to shift between front gears on the front side of the seat body 1.

When the bulge 3-4-1 of the lower gear fixing piece is positioned at the top end of the limiting chute 3-2-3, the front gear fixing piece 3-4 is limited in a gear of a front upper gear 1-2 or a front lower gear 1-3; when the handle 3-2 is pulled upwards, and the bulge 3-4-1 of the lower gear fixing piece moves downwards along the limiting chute 3-2-3, the front gear fixing piece 3-4 gradually moves towards the middle of the handle 3-2 along the limiting chute 3-2-3 respectively due to the effect of the inverted splayed shape; when the protrusion 3-4-1 of the lower gear fixing piece moves to the bottom of the limiting chute 3-2-3, the front gear fixing piece 3-4 is separated from the middle of the gear of the front upper gear 1-2 or the front lower gear 1-3 of the seat body 1, and the handle 3-1 is pulled, so that the front gear fixing piece 3-4 can be conveniently moved to any other gear of the front gear.

The middle line position of the back of the handle 3-2 is provided with a small boss 3-2-1, the edges of the two sides of the back of the handle 3-2 are provided with a large boss 3-2-2, and the position of the small boss 3-2-1 is higher than that of the large boss 3-2-2 and is used for being matched with the seat body 1 and the limiting locking component 4. When the handle 3-2 is arranged on the seat body 1 along with the headrest 2, the middle small boss 3-2-1 passes through and protrudes out of the body back plane 1-5 of the seat body 1 and can move up and down along the center line of the body back plane 1-5 along with the handle 3-2; the big bosses 3-2-2 at the two sides also protrude out of the two sides of the back plane 1-5 of the body and can move up and down along the two sides of the back plane 1-5 of the body along with the handle 3-2.

The limit locking assembly 4 is a symmetrically arranged assembly, is arranged at the rear side of the seat body 1 and can slide up and down along the body rear plane 1-5 at the back of the seat body 1.

The limiting locking assembly 4 comprises a limiting fixing piece 4-1, a headrest fixing rod 4-2, a fixing rod limiting piece 4-3, a fixing rod pressure spring 4-4, a limiting locking block 4-5 and a locking block pressure spring 4-6.

As shown in fig. 6-9, the position-limiting fixing member 4-1 is a symmetrical integral molding member, which forms the outer shell of the whole position-limiting locking assembly 4, and comprises a top end 4-1-1 of the position-limiting fixing member arranged at the central line position of the upper part and side wings 4-1-2 of the position-limiting fixing member symmetrically arranged at the two sides of the lower part.

The middle line position of the upper part of the limiting fixing piece 4-1 is provided with a limiting fixing piece top end 4-1-1, the limiting locking piece 4-5 and a locking piece pressure spring 4-6 are arranged in the limiting fixing piece top end 4-1-1, the limiting locking piece 4-5 can move along the middle line of the body back plane 1-5 of the seat body 1, the small boss 3-2-1 is also at the middle line position of the body back plane 1-5, so the limiting locking piece 4-5 can pass through the small boss 3-2-1 when moving up and down, and the locking piece pressure spring 4-6 is limited between the limiting locking piece 4-5 and the limiting fixing piece 4-1, so the thrust of the limiting locking piece 4-5 to the body back plane 1-5 is always provided.

The two sides of the lower part of the limiting fixing piece 4-1 are symmetrically provided with limiting fixing piece side wings 4-1-2, and the limiting fixing piece side wings 4-1-2 can be inserted into hollow parts between the rear gears 1-4 and the rear plane 1-5 of the body, so that the limiting locking assembly 4 can slide up and down along the rear plane 1-5 of the body; the fixing rod limiting parts 4-3 are arranged at the inner side positions of the limiting fixing part side wings 4-1-2 at the two sides, and the tail parts of the fixing rod limiting parts 4-3 are provided with round holes for mounting the headrest fixing rod 4-2.

The tail end of the lower portion of the limiting fixing piece 4-1 is provided with a fixing rod through hole 4-1-3 used for penetrating through a headrest fixing rod 4-2, the headrest fixing rod 4-2 is assembled in a fixing rod limiting piece 4-3 round hole and penetrates through the fixing rod through hole 4-1-3, shoulder straps are respectively sleeved on two sides of the headrest fixing rod 4-2, and the fixing rod through hole 4-1-3 penetrates through the tail portion of the whole limiting fixing piece 4-1. When the limit locking assembly 4 is limited by the limit fixing part side wings 4-1-2 to move on two sides of the body rear plane 1-5, the fixing rod limiting pieces 4-3 slide up and down along two side edges of the body rear plane 1-5, that is, the large boss 3-2-2 slides on the movement track of the fixing rod limiting pieces 4-3, and when the fixing rod limiting pieces 4-3 move to the top of the large boss 3-2-2, the large boss 3-2-2 pushes the fixing rod limiting pieces 4-3 higher, so that the whole limit locking assembly 4 is pushed higher, and the headrest fixing rod 4-2 can be pushed to protrude out of a gear, and further the gear is adjusted.

The fixing rod pressure spring 4-4 is compressed between the headrest fixing rod 4-2 and the limiting fixing piece 4-1, so that the headrest fixing rod 4-2 always tends to move towards a rear gear 1-4 on the back of the seat body 1, and the headrest fixing rod 4-2 can always move in the rear gear 1-4 under the condition of no external force influence.

When the limiting locking assembly 4 moves up and down along the center line of the body rear plane 1-5 on the back surface of the seat body 1, because the upper limiting block 1-6 and the upper limiting groove 1-7 on the back surface of the seat body 1 are both arranged on the center line of the body rear plane 1-5, the small boss 3-2-1 in the middle of the back surface of the handle 3-2 can also move up and down along the center line of the body rear plane 1-5 along with the handle 3-2, and the upper limiting block 1-6, the upper limiting groove 1-7 and the small boss 3-2-1 are all on the movement track of the limiting fixing piece 4-1; and the big bosses 3-2-2 at the edges of the two sides of the back of the handle 3-2 respectively protrude out of the two sides of the back plane 1-5 of the body, so that the big bosses 3-2-2 are on the motion track of the fixed rod limiting piece 4-3.

When the fixed rod limiting piece 4-3 moves from the bottom of the large boss 3-2-2 to the highest point position of the large boss 3-2-2, pressure capable of overcoming the elasticity of the fixed rod pressure spring 4-4 is provided for the fixed rod limiting piece 4-3, so that the fixed rod limiting piece 4-3 can drive the headrest fixed rod 4-2 to leave the rear gear 1-4, and the effect of adjusting the rear gear 1-4 is achieved.

The rear upper limiting block 1-6 on the back of the seat body 1 is the uppermost limiting position of the limiting fixing piece 4-1 moving upwards, when the limiting locking assembly 4 moves to the uppermost limiting position, the limiting locking block 4-5 falls into the rear upper limiting groove 1-7 due to the elasticity of the locking block pressure spring 4-6, and when the handle 3-2 drives the headrest 2 to move upwards continuously, the limiting locking block 4-5 is limited, so that the headrest fixing rod 4-2 is also limited and can not be shifted upwards continuously.

After the limiting locking block 4-5 falls into the rear upper limiting groove 1-7, if the small boss 3-2-1 moves to the overlapping position of the upper limiting groove 1-7, the small boss 3-2-1 protrudes out of the upper limiting groove 1-7, the limiting locking block 4-5 can be ejected out of the upper limiting groove 1-7, and the limiting locking assembly 4 can leave the upper limiting position, so that the headrest fixing rod 4-2 can be shifted downwards.

The headrest is adjusted as follows:

as shown in FIG. 10, the initial state of the headrest is a locked state in which the headrest is at the lowest position on the seat, and 0/0+ group children can be seated. At the moment, the front gear fixing piece 3-4 is in the lowest gear of the front lower gear 1-3, the headrest fixing rod 4-2 is in the lowest position of the rear gear 1-4, the large boss 3-2-2 is positioned on the lower side of the headrest fixing rod 4-2, and the small boss 3-2-1 is positioned on the lower side of the rear upper limiting groove 1-7.

As shown in fig. 11, when an upward pulling force is applied to the handle 3-1, the handle 3-2 moves upward against the action force of the handle pressing spring 3-3, and the limiting inclined groove 3-2-3 at the bottom of the handle 3-2 moves upward, so that the front gear fixing piece 3-4 is driven to move from two sides to the middle and finally leaves the lowest gear, meanwhile, the large boss 3-2-2 moves from bottom to top along with the handle 3-2, and when the top point of the large boss 3-2-2 moves to the fixing rod limiting piece 4-3, the headrest fixing rod 4-2 is ejected out of the rear gear 1-4, that is, the front gear and the rear gear of the seat body 1 can be adjusted, and the headrest can move upward.

As shown in figure 12, the handle 3-1 is continuously pulled upwards, the headrest fixing rod 4-2 can move to the highest gear of the rear gears 1-4 and stop, at the moment, the limiting locking block 4-5 falls into the rear upper limiting groove 1-7, and the corresponding front gear fixing piece 3-4 enters the highest gear of the front lower gears 1-3. The highest gear of the rear gears 1-4 is generally considered to be the required shoulder height position of children in group 1, or children 105 mm in height or 4 years old, the limit locking assembly 4 cannot move upwards continuously due to the action of the rear upper limit blocks 1-6, and the headrest fixing rod 4-2 reaches the highest gear position of the rear gears 1-4. This is the maximum usable range of the five-point seat belt system.

As shown in fig. 13-14, when an upward pulling force is further applied to the handle 3-1, the small boss 3-2-1 and the large boss 3-2-2 both go over the limit lock block 4-5 and the fixed rod limit piece 4-3 to move upward, and the limit lock assembly 4 cannot move upward, so the shoulder strap fixed on the headrest fixed rod 4-2 cannot move upward, and at this time, 2 shoulder straps do not need to be removed, and the headrest can be adjusted upward to the highest point because the shoulder straps pass through the shoulder strap holes of the headrest, and the 5-point safety belt is pulled flat, so that the use of the 5-point safety belt is limited in a physical manner, and at this time, only the three-point safety belt system of the automobile can be used. That is, the 5-point seat belt can be used as a 3-point seat belt system without removing the shoulder belt. The front gear fixing piece 3-4 is at the lowest gear of the front upper gear 1-2, namely, the highest adjustable position of the headrest is the range used by the seat 2/3 group. The gears of the whole front upper gears 1-2 are the height 105 and 150CM or the weight 18KG-36KG, and the headrest can be pulled to the highest gear of the front upper gears 1-2.

On the contrary, if the headrest 2 is adjusted downwards, an upward pulling force is still applied to the handle 3-1, the limiting inclined groove 3-2-3 at the bottom of the handle 3-2 drives the front gear fixing piece 3-4 to be separated from the original gear, a downward pressure is applied to the handle 3-1, when the headrest 2 moves from top to bottom, because the highest limit of the limit locking blocks 4-5 is not released by the rear upper limit grooves 1-7, the position of the big boss 3-2-2 is lower than that of the small boss 3-2-2, so that the big boss 3-2-2 moves downwards firstly to jack the headrest fixing rod 4-2 and drive the headrest fixing rod 4-2 to jump up in the gear, and after the big boss 3-2-2 moves to the lower side of the headrest fixing rod 4-2, the headrest fixing rod 4-2 is reset to the original gear; the handle 3-2 continues to move downwards, when the small boss 3-2-1 on the back of the handle 2 moves downwards to the rear upper limit groove 1-7, the limit lock block 4-5 is ejected out, the limit lock assembly 4 leaves the highest limit position and can move downwards, when the top point of the large boss 3-2-2 runs to the position of the fixed rod limit piece 4-3, the headrest fixed rod 4-2 is ejected out of the rear gear 1-4, the gear can be adjusted downwards, and the headrest 2 can be adjusted to the lowest position of the seat body 1 or any other gear falling positions.

Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (9)

1. The utility model provides an adjustable head rest for children's safety seat, sets up on seat body (1), its characterized in that, including adjusting stop gear, adjust stop gear and include handle subassembly (3) and spacing locking Assembly (4), handle subassembly (3) include handle (3-2), install at the head rest rear side handle (3-2) drive head rest (2) for seat body (1) up-and-down motion, handle (3-2) are equipped with little boss (3-2-1) and big boss (3-2-2), little boss (3-2-1) and big boss (3-2-2) all set up on the orbit of spacing locking Assembly (4), drive little boss (3-2-1) or big boss (3-2-2) when handle (3-2) move to spacing locking Assembly (4) When in position, the limit locking component (4) is jacked up, so that the position of the headrest (2) on the seat body (1) is adjusted.

2. The adjustable headrest for the child safety seat according to claim 1, wherein the large bosses (3-2-2) are arranged at two side edges of the back of the handle (3-2), the limit locking assembly (4) comprises a headrest fixing rod (4-2), a fixing rod limiting part (4-3) and a fixing rod pressure spring (4-4), the fixing rod limiting part (4-3) is arranged at two sides of the lower part of the limit locking assembly (4), the headrest fixing rod (4-2) fixes the tail part of the fixing rod limiting part (4-3), the fixing rod pressure spring (4-4) is arranged at the back side of the headrest fixing rod (4-2), the back of the seat body (1) is provided with a back gear (1-4), the large bosses (3-2-2) are arranged on the motion track of the fixing rod limiting part (4-3), in the back gear (1-4), when the handle (3-2) drives the large boss (3-2-2) to move to the position of the fixed rod limiting part (4-3), the headrest fixing rod (4-2) jacks up the fixed rod limiting part (4-3) so as to push the headrest fixing rod (4-2) to eject the back gear (1-4).

3. An adjustable headrest for a child safety seat according to claim 2, the top of the central line of the limiting locking component (4) is provided with a limiting locking block (4-5) and a locking block pressure spring (4-6), the middle line position of the top end of the back surface of the seat body (1) is sequentially provided with a rear upper limiting block (1-6) and a rear upper limiting groove (1-7) from top to bottom, the rear upper limiting blocks (1-6) and the rear upper limiting grooves (1-7) are all positioned on the motion trail of the limiting locking component (4), when the limiting locking block (4-5) moves upwards until falling into the rear upper limiting groove (1-7), the limit locking assembly (4) is blocked by the rear upper limit block (1-6), and the headrest fixing rod (4-2) is limited and can not be adjusted upwards continuously.

4. The adjustable headrest for the child safety seat according to claim 3, wherein the small boss (3-2-1) is arranged at a central line position of the back of the handle (3-2), the small boss (3-2-1) is arranged on a motion track of the limit lock block (4-5), and when the limit lock block (4-5) falls into the rear upper limit groove (1-7), and if the small boss (3-2-1) moves to an overlapped position of the upper limit groove (1-7), the small boss (3-2-1) penetrates through the upper limit groove (1-7) to jack up the limit lock block (4-5), so that the limit lock assembly (4) can drive the headrest fixing rod (4-2) to adjust the gear downwards.

5. The adjustable headrest for child safety seats according to claim 3, wherein the limit locking assembly (4) further comprises a limit fixing member (4-1), the limit fixing member (4-1) comprises an upper limit fixing member top end (4-1-1) and lower limit fixing member side wings (4-1-2) arranged symmetrically on both sides, the limit locking block (4-5) and the locking block compression spring (4-6) are arranged in the limit fixing member top end (4-1-1), the fixing rod limiting member (4-3) is arranged at the limit fixing member side wings (4-1-2) on both sides, the tail end of the lower portion of the limit fixing member (4-1) is provided with a fixing rod through hole (4-1-3), the headrest fixing rod (4-2) is limited in the fixing rod through hole (4-1-3) to move back and forth.

6. An adjustable headrest for a child safety seat according to claim 1, the front sides of the front surface of the seat body (1) are symmetrically provided with adjustable front gears, the handle component (3) also comprises front gear fixing pieces (3-4), one end part of the front gear fixing piece (3-4) is provided with a lower gear fixing piece bulge (3-4-1), the bottom of the handle (3-2) is provided with an inverted splayed limiting chute (3-2-3), the lower gear fixing piece bulge (3-4-1) is arranged in the limiting chute (3-2-3) for limiting movement, the lower gear fixing piece bulge (3-4-1) is driven by the limiting chute (3-2-3), so that the front gear fixing piece (3-4) is driven to shift between front gears.

7. The adjustable headrest for child safety seats according to claim 1, characterized in that the handle assembly (3) further comprises a handle compression spring (3-3), the front surface of the handle (3-2) is provided with a handle compression spring base (3-5), the back surface of the headrest (2) is provided with a handle compression spring top seat (2-1), and the handle compression spring (3-3) is always clamped between the handle compression spring top seat (2-1) and the handle compression spring base (3-5).

8. The adjustable headrest for the child safety seat according to claim 1, wherein the handle assembly (3) further comprises a handle (3-1), the handle (3-1) and the handle (3-2) are assembled together from top to bottom, the handle assembly (3) is installed at the rear side of the headrest (2), the middle of the front surface of the seat body (1) is provided with a guide chute (1-1) from top to bottom, the headrest (2) drives the handle assembly (3) to be installed in the seat body (1) along the guide chute (1-1) of the seat body (1), and the handle assembly (3) can drive the headrest (2) to slide up and down by pulling the handle.

9. Adjustable headrest for child safety seats according to claim 2, characterized in that said child safety seat is provided with shoulder straps (5), one end of said shoulder straps (5) being provided at both ends of a headrest fixing rod (4-2).

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