Child safety seat

Abstract

The utility model relates to a child safety seat. A child safety seat includes a seatbelt, a backrest body, and a headrest portion. The backrest body is provided with a plurality of gear grooves and a rod used for winding a safety belt. The headrest part is movably arranged on the backrest body and comprises a headrest body and a headrest adjusting mechanism. The headrest adjusting mechanism comprises a sliding piece and a headrest clamping piece. The sliding piece is connected to the headrest body and provided with a shell and a sliding groove. The headrest clamping piece is arranged in the sliding groove in a penetrating mode and can move between a headrest locking position and a headrest unlocking position. When the headrest clamping piece is located at the headrest locking position, the headrest clamping rod is clamped with one of the gear grooves, and when the headrest clamping piece is switched to the headrest unlocking position, the sliding piece is separated from the gear grooves. The headrest body is provided with a safety belt penetrating opening, and at least one part of the shell is located above the safety belt penetrating opening. A connecting line between the rod and the safety belt penetrating opening penetrates through the shell so that the safety belt arranged between the rod and the safety belt penetrating opening can abut against the shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's articles technical field especially children's safety seat. BACKGROUND

[0002] Children's safety seat provides safety guarantee for children's travel by car. In order to adapt to children of different body shapes and heights, the headrest of children's safety seat is generally set to be capable of height adjustment, so that the relative backrest can be positioned at different height positions, thereby providing comfortable head support for children. In the existing children's safety seat, the structure of the headrest adjustment mechanism for headrest height adjustment is relatively complex, and when the vehicle is used in a bumpy section, the headrest adjustment mechanism may also be accidentally unlocked, causing the headrest height to suddenly decrease.

[0003] In addition, some children's safety seats on the market also have a booster cushion, which can be fixed on the vehicle seat by the safety belt of the vehicle seat for use by larger children. However, the existing booster cushion has the problems of complex structure, inconvenience for disassembly, etc. SUMMARY

[0004] The first aspect of the utility model provides a headrest part with simple structure and a children's safety seat with the headrest part. The children's safety seat according to the first aspect comprises a safety belt, a backrest body and a headrest part. The backrest body is formed with a plurality of gear grooves and a rod for winding the safety belt. The headrest part is movably arranged on the backrest body and comprises a headrest body and a headrest adjustment mechanism. The headrest adjustment mechanism comprises a sliding piece and a headrest clamping piece. The sliding piece is connected to the headrest body and is provided with a shell and a sliding groove. The headrest clamping piece is arranged in the sliding groove and can move between a headrest locking position and a headrest release position. When the headrest clamping piece is located at the headrest locking position, the headrest clamping piece is clamped with one of the plurality of gear grooves. When the headrest clamping piece is switched to the headrest release position, the sliding piece is separated from the plurality of gear grooves. The headrest body is provided with a safety belt through hole, and at least a part of the shell is located above the safety belt through hole. The line between the rod and the safety belt through hole passes through the shell, so that the safety belt arranged between the rod and the safety belt through hole can press on the shell.

[0005] In the above-mentioned first aspect, the extension surface of the rear surface of the shell passes through the rod, so that the safety belt located on the front side of the rod presses on the sliding piece, and the safety belt located on the rear side of the rod is arranged in a spaced manner with the sliding piece.

[0006] In the first aspect, the lower end of the rear surface of the shell has a guide surface for guiding the safety belt, and the guide surface is a slope or a convex cylindrical surface.

[0007] In the first aspect, the backrest body is provided with a sliding groove extending along the longitudinal direction of the backrest body and penetrating the surface of the backrest body, and the sliding member is slidably fitted with the sliding groove so that at least a part of the shell is arranged in the sliding groove. The rod is arranged above the sliding groove. A plurality of gear grooves are linearly arranged along the two sides of the sliding groove, and the opening direction of the plurality of gear grooves is away from the headrest body.

[0008] In the first aspect, the backrest body is provided with a first fitting part, the extending direction of the first fitting part is parallel to the extending direction of the sliding groove, and the sliding member is provided with a second fitting part. One of the first fitting part and the second fitting part is a groove, and the other of the first fitting part and the second fitting part is a rib, and the first fitting part and the second fitting part are fitted with each other.

[0009] In the first aspect, the backrest body is provided with a plurality of gear ribs, each gear groove is formed in the plurality of gear ribs, the opening direction of the plurality of gear grooves is away from the headrest body, each gear groove has a downwardly inclined slope, and the end of the slope is provided with a stop protrusion for blocking the headrest engaging member from sliding off the slope.

[0010] In the first aspect, the two sides of the sliding groove are respectively provided with protrusions, and the plurality of protrusions are respectively arranged above and / or below the gear grooves.

[0011] In the first aspect, the axis of the rod is located in front of the extension plane of the rear surface of the shell. In the first aspect, the rod comprises a rod body and a rotating sleeve rotatably sleeved on the rod body, and the safety belt is adapted to be arranged on the rotating sleeve.

[0012] In the first aspect, the headrest adjusting mechanism further comprises a headrest driving member movably connected to the headrest part and drivingly connected to the headrest engaging member. The headrest engaging member comprises a headrest engaging rod which at least partially extends out of the sliding member. The headrest driving member is provided with a driving groove, and the included angle between the extending directions of the sliding groove and the driving groove is an acute angle. The headrest engaging rod is arranged in the sliding groove and the driving groove and can slide along the extending directions of the sliding groove and the driving groove.

[0013] In the first aspect, the sliding member has a first containing groove in communication with the sliding groove, one end of the first containing groove is an open end, and the other end of the first containing groove is formed as a limiting end. At least a part of the headrest driving member is slidably arranged in the first containing groove and is adapted to be stopped by the limiting end.

[0014] In the first aspect, the headrest adjusting mechanism further comprises a first reset member arranged between the sliding member and the headrest driving member. The first reset member is adapted to bias the headrest driving member to drive the headrest engaging rod to move towards the headrest locking position.

[0015] In the first aspect, the slide member is provided with a first accommodating groove and a second accommodating groove in communication with each other, at least a part of the headrest driving member is accommodated in the first accommodating groove and is provided with an abutting surface, one end of the first reset member is accommodated in the second accommodating groove and abuts against an end of the second accommodating groove, and the other end of the first reset member extends into the first accommodating groove and abuts against the abutting surface.

[0016] In the first aspect, the headrest further comprises a headrest operating member, which is operatively arranged on the headrest body and is drivingly connected with the headrest driving member, the headrest body is provided with a through channel, and the headrest operating member further comprises an operating portion and a connecting arm connected between the operating portion and the headrest driving member, the connecting arm extends along the longitudinal direction of the headrest body, and the operating portion is movably arranged on the front surface of the headrest body, and at least a part of the headrest driving member extends through the through channel and extends to the back surface of the headrest body.

[0017] The second aspect of the utility model provides a child safety seat, it includes backrest and heighten seat pad. Heighten seat pad with backrest is detachable connection. Heighten seat pad includes seat pad main part, connecting mechanism and holding mechanism. Connecting mechanism is used for engaging backrest. The connecting mechanism is provided on the seat pad main body and includes a clamping member, the clamping member is movably connected with the seat pad main body and switches between the clamping locking position and the clamping release position. The holding mechanism is movably connected with the seat pad main body and can switch between the holding release position and the holding locking position. When the holding mechanism is located in the holding locking position, the holding mechanism is clamped with the connecting mechanism, so that the clamping member is kept in the clamping release position. When the holding mechanism is located in the holding release position, the holding mechanism is unclamped with the connecting mechanism, so as to allow the clamping member to switch to the clamping locking position.

[0018] In the second aspect, the backrest includes a holding member driving portion, which drives the holding mechanism to move relative to the seat pad main body to the holding release position when the heighten seat pad is connected to the backrest, thereby allowing the clamping member to switch to the clamping locking position.

[0019] In the second aspect, the holding mechanism includes a holding member connected to the seat pad main body and a reset member provided between the holding member and the seat pad main body. The holding member includes a driving portion and a transmission portion connected to the driving portion, the transmission portion is used for clamping the connecting mechanism, the driving portion is used for driving the holding member to the holding release position, and the reset member is configured to bias the holding mechanism to the holding locking position.

[0020] In the second aspect, the third reset member includes a first elastic member, which is a compression spring, a tension spring or a spring piece.

[0021] In the second aspect, the driving part is rotatably arranged on the first pivot, and the transmission part rotatably abuts against or disengages from the first elastic member with movement of the driving part relative to the seat cushion body, thereby switching the retaining mechanism between the retaining release position and the retaining locking position.

[0022] In the second aspect, the transmission part comprises a crossbar. The first elastic member is arranged between the crossbar and the seat cushion body, and the crossbar is switched between abutting against the first elastic member and pushing away from the first elastic member through movement of the driving part relative to the seat cushion body.

[0023] In the second aspect, the seat cushion body comprises a first shell and a second shell, which are engaged and form a seat cushion cavity of the booster seat cushion for accommodating the connecting mechanism and the retaining mechanism.

[0024] In the second aspect, the first shell is formed with an opening, the driving part comprises a rotating lug pivoted to the transmission part through a first pivot, the rotating lug protrudes out of the seat cushion cavity through the opening when the retaining mechanism is in the retaining locking position, and the rotating lug is accommodated in the seat cushion cavity when the retaining mechanism is in the retaining release position.

[0025] In the second aspect, the seat cushion body comprises a guide groove recessed towards an interior space, and the opening is located in the guide groove; the rotating lug has an inclined surface inclined towards an entrance direction of the guide groove.

[0026] In the second aspect, the engaging member comprises an engaging connecting part, the connecting mechanism further comprises a first operating member, the first operating member is formed with an operating connecting part and an operating block integrally formed with the operating connecting part, the transmission part is clamped to the operating block, and the engaging connecting part is slidably connected to the operating connecting part, thereby switching the engaging member between the engaging locking position and the engaging release position; the operating connecting part comprises a driving groove, and the engaging connecting part is a rod connected to and sliding in the driving groove, thereby allowing the engaging member to switch between the engaging locking position and the engaging release position.

[0027] In the second aspect, the connecting mechanism further comprises a fourth reset member, one end of which is connected to the seat cushion body and the other end of which is connected to the engaging member, the fourth reset member biases the engaging member towards the engaging locking position through sliding between the engaging connecting part and the operating connecting part, and the fourth reset member comprises a second elastic member, which is a spring or a spring sheet.

[0028] In the second aspect, the engaging member includes an engaging pin, and the seat cushion body includes a seat cushion engaging hole into which the engaging pin is inserted and protrudes, thereby switching between the engaging locked position and the engaging released position.

[0029] In the second aspect, a first limiting hole extending a certain length along the movement direction of the operation block is further formed on the operation block. The first operation member includes a limiting column which passes through the first limiting hole and is fixed in the seat cushion body, thereby enabling the first operation member to move relative to the seat cushion body.

[0030] In the second aspect, an operation recess is further formed on the operation block, and the seat cushion body includes an engaging opening. The operation recess is formed in a manner of being recessed from the outside to the inside of the seat cushion body and is exposed outward from the engaging opening. The seat cushion body includes a second limiting rib which is arranged along the movement direction of the first operation member, thereby enabling the first operation member to abut against the second limiting rib.

[0031] In the second aspect, a limiting protrusion is further formed on the operation block, which protrudes from the side of the operation block opposite to the outwardly exposed surface of the operation recess. The second limiting rib has a clamping recess which is matched with the shape of the limiting protrusion. The limiting protrusion is clamped or unclamped with the clamping recess as the engaging member switches between the engaging locked position and the engaging released position.

[0032] In the second aspect, the seat cushion body further includes an armrest portion which is arranged on both sides of the seat cushion body and extends upward from the upper surface of the seat cushion body at a certain angle with respect to the upper surface, and a first sleeve hole which is adapted to the passage of a vehicle safety belt.

[0033] In the second aspect, the armrest portion includes a storage recess which is formed outside the seat cushion cavity by a portion of the seat cushion body and has a storage space. The storage recess includes a storage connecting hole and a connecting groove. The booster cushion further includes a storage cup which includes a connecting column protruding from the bottom of the storage cup and a cup connecting convex protruding from the side of the storage cup. The connecting column is inserted into the storage connecting hole, and the cup connecting convex clamps the connecting groove.

[0034] The third aspect of the utility model provides a child safety seat. The child safety seat comprises a backrest part and a heightening seat pad according to the second aspect. The heightening seat pad is detachably connected with the backrest part. The backrest part comprises a retaining member driving part, which drives the retaining mechanism to move to the retaining release position relative to the seat pad body when the heightening seat pad is connected to the backrest part, thereby allowing the clamping member to switch to the clamping locking position.

[0035] In the third aspect, the backrest part comprises a backrest body, which further comprises a backrest limiting rib and a clamping member receiving part. The seat pad body comprises a matching rib, and the backrest limiting rib matches with the matching rib to limit the relative movement between the backrest part and the heightening seat pad, and the clamping member receiving part is clamped with the clamping member.

[0036] In the third aspect, the clamping member comprises a clamping pin, the clamping member receiving part comprises a backrest clamping hole, the clamping pin is inserted into the backrest clamping hole, the backrest part comprises a reinforcing pipe, the reinforcing pipe is fixedly installed in the backrest body and extends from the backrest upper part to the backrest lower part of the backrest body, and comprises a first reinforcing hole at a position opposite to the clamping member receiving part, and the clamping member is inserted into the first reinforcing hole through the clamping member receiving part.

[0037] In the third aspect, the retaining member driving part comprises a driving protrusion, which can push the retaining mechanism to the retaining release position when the heightening seat pad is connected to the backrest part.

[0038] In the third aspect, the child safety seat further comprises a base and an angle adjusting mechanism. The base comprises a base body, an engaging part and a pivoting part, the pivoting part and the engaging part extend upward from the base body at a certain angle relative to the base body, the engaging part is engaged with the angle adjusting mechanism, and the pivoting part is rotatably connected with the backrest body of the backrest part through a second pivot, the angle adjusting mechanism is movably connected to the base and movably connected to the backrest part, thereby adjusting the angle of the backrest part relative to the base.

[0039] In the third aspect, the angle adjusting mechanism comprises a fifth reset member and a second operating member. One end of the fifth reset member is connected to the backrest part and can move relative to the backrest part, and the other end is connected to the second operating member. One end of the second operating member is rotatably connected to the backrest body through a third pivot, and the other end is movably connected to the base, and when a force is applied on the backrest part, the second operating member moves the backrest part relative to the base through the fifth reset member.

[0040] In the third aspect, the fifth reset member includes a third elastic member, one end of the third elastic member is connected to the backrest body, the second operating member includes a rotating part and a sliding part, the rotating part is rotatably connected to the backrest body, and one end of the sliding part is connected to the base and the other end is connected to the third elastic member and can slide relative to the base, the base includes a gear part protruding from the base body, the gear part includes at least one angle gear slot formed at an angle inclined upward from the base body along the running direction of the fifth reset member, and the sliding part includes a foot matched with the gear part, a gear pin passes through the foot and is engaged in the angle gear slot.

[0041] In the third aspect, the gear part further includes an angle gear rib at least partially surrounding the angle gear slot along the movement direction of the gear pin, so as to stop the gear pin in the angle gear slot.

[0042] In the third aspect, the child safety seat further includes a reinforcing tube fixedly installed in the backrest part and including a second reinforcing hole at the opposite position of the second pivot, and the second pivot is inserted into the second reinforcing hole through the connecting hole of the backrest body.

[0043] In the third aspect, the backrest body of the backrest part includes a storage recess above the booster cushion. The storage recess is recessed from the backrest body to the side opposite to the side surrounded by the backrest part and the booster cushion. The backrest part includes a cover rotatably inserted into the backrest body and closing the storage recess.

[0044] In the third aspect, the cover is formed with an elastic finger and a window, the elastic finger protrudes from one end of the cover and is bent. The elastic finger protrudes from the window to the side of the cover facing the storage recess when the cover is closed. The elastic finger includes a positioning step protruding from the surface of the elastic finger close to the free end. The storage recess includes a positioning rib protruding from the backrest body to the storage recess. The positioning step can be clamped on the positioning rib, so as to close the storage recess.

[0045] In the third aspect, the child safety seat further includes a headrest detachably assembled on the upper part of the backrest part and adapted to receive the head of a child. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. It should be clear that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the premise of not paying creative effort.

[0047] In addition, the drawings are not drawn in a 1:1 ratio, and the relative sizes of the various components are only exemplarily drawn in the drawings, not necessarily drawn in true proportions. In the drawings:

[0048] Figure 1 A perspective view of a child safety seat according to an embodiment of the present application is shown;

[0049] Figure 2 A perspective view of the child safety seat in Figure 1 after the headrest is adjusted is shown;

[0050] Figure 3 A perspective view of the child safety seat in Figure 1 from another viewing angle, wherein the child safety seat is provided with a seat safety belt;

[0051] Figure 4 A perspective view of the child safety seat in Figure 2 from another viewing angle after one of the sliders is removed;

[0052] Figure 5 A partial view of a sectional view along line U1-U1 of the child safety seat in Figure 3 is shown;

[0053] Figure 6 A partial view of a sectional view along line U1-U1 of the child safety seat in Figure 3 after the headrest is adjusted is shown;

[0054] Figure 7 A sectional view along line U2-U2 of the child safety seat in Figure 1 is shown;

[0055] Figure 8 A perspective view of a headrest according to an embodiment of the present application is shown;

[0056] Figure 9 A perspective view of the headrest in Figure 7 after one of the sliders is removed is shown;

[0057] Figure 10 A perspective view of the headrest in Figure 8 from another viewing angle is shown;

[0058] Figure 11 a sectional view along the line U3-U3 in Figure 10 ; and

[0059] Figure 12 a perspective view of a booster cushion in

[0060] Figure 13 a perspective view of a child safety seat according to another embodiment of the present utility model;

[0061] Figure 14 a perspective view of a booster cushion in Figure 13 ; and

[0062] Figure 15 a perspective view of a child safety seat in Figure 13 , after removal of the booster cushion;

[0063] Figure 16 a perspective view of a booster cushion in Figure 14 , from another viewing angle;

[0064] Figure 17 a perspective view of a child safety seat in Figure 13 , after removal of the booster cushion, and a partial enlarged view;

[0065] Figure 18 a bottom oblique view of a booster cushion in Figure 13 ; and

[0066] Figure 19 a sectional view along A1-A1 of a child safety seat in Figure 13 , with the booster cushion fully assembled into the child safety seat, and a partial enlarged view;

[0067] Figure 20 a sectional view along A2-A2 of a child safety seat in Figure 13 , with the booster cushion not yet fully assembled into the child safety seat, and a partial enlarged view;

[0068] Figure 21 a perspective view of a booster cushion according to an embodiment of the present utility model, after removal of the second shell, with the connection mechanism in the snap-locked position;

[0069] Figure 22 a sectional view along B-B of a child safety seat in Figure 13 , with the connection mechanism in the snap-locked position;

[0070] Figure 23 a perspective view of a booster cushion according to an embodiment of the present utility model, after removal of the second shell, with the connection mechanism in the snap-unlocked position;

[0071] Figure 24 A perspective view of a booster seat according to an embodiment of the present invention is shown from another angle, showing the bottom of the booster seat and the connecting mechanism in the locked / unlocked position;

[0072] Figure 25 The illustration shows a perspective view of a booster seat according to an embodiment of the present invention after the second housing has been removed, with the connecting mechanism in the engaged and locked position.

[0073] Figure 26 This image shows a booster seat cushion according to an embodiment of the present invention, viewed from another perspective, with the connecting mechanism in the engaged and locked position;

[0074] Figure 27 Show Figure 13 A perspective view of a child safety seat from another angle;

[0075] Figure 28 Show Figure 27 A cross-sectional view of a child safety seat along the CC, showing the angle adjustment mechanism adjusted to its minimum height relative to the base;

[0076] Figure 29 Show Figure 28 A cross-sectional view of a child safety seat along CC, showing the angle adjustment mechanism adjusted to another height relative to the base;

[0077] Figure 30 A perspective view of a base according to an embodiment of the present invention is shown;

[0078] Figure 31 This is a schematic diagram of the bottom of a child safety seat according to an embodiment of the present invention after the base has been removed;

[0079] Figure 32 To show Figure 27 A schematic diagram of a cross-section taken along DD of a child safety seat;

[0080] Figure 33 A perspective view of a child safety seat according to an embodiment of the present invention is shown, wherein the cup on one side has been removed;

[0081] Figure 34 A perspective view of the cup is shown;

[0082] Figure 35 Show Figure 13 A perspective view of a child safety seat in the image, showing the closed storage recess.

[0083] Figure 36 A cover according to an embodiment of the present invention is shown;

[0084] Figure 37 To Figure 35 Fig. 2 is a schematic view of the child safety seat of Fig. 1 with the cover removed; and

[0085] Figure 38 Fig. 3 shows a partially exploded view of a child safety seat according to an embodiment of the present application, with the seat shell removed.

[0086] Reference signs

[0087] 10 child safety seat

[0088] 200 base; 201 upper base shell; 202 lower base shell; 210 base body; 211 upper base surface; 220 angle section; 221 angle section slot; 222 angle section rib; 223 recess; 230 joint section; 240 pivot section

[0089] 100 seat assembly

[0090] 1000 backrest section; 1100 backrest body; 1110 front face of backrest body; 1120 back face of backrest body; 1200 sliding slot; 1210 first sliding slot; 1220 second sliding slot; 1300 angle section rib; 1310 first angle section rib; 1320 second angle section rib; 1330 third angle section rib; 1400 angle section slot; 1400a first angle section recess; 1400b second angle section recess; 1400c third angle section recess; 1410 upper side wall of angle section slot; 1411 limit protrusion; 1420 lower side wall of angle section slot; 1421 stop protrusion; 1430 bottom wall of angle section slot; 1500 first fitting section; 1600 protrusion section; 1610 first protrusion section; 1620 second protrusion section

[0091] 1700 reinforcing rod; 1710 rod body; 1720 rotating sleeve

[0092] 2000 seat section; 2100 seating surface

[0093] 3000 headrest section

[0094] 3100 headrest body; 3111 front face of headrest body; 3112 back face of headrest body; 3120 mounting section; 3130 harness pass-through; 3140 threading channel; 3150 fitting section

[0095] 3200, headrest adjustment mechanism; 3210, headrest engaging member; 3211, headrest engaging rod; 3220, headrest operating member; 3221, operating portion; 3222, connecting arm; 3223, operating connecting portion; 3225, abutting surface; 3226, accommodating recess; 3227, connecting opening; 3230, sliding member; 3231, housing; 3232, upper side surface; 3233, guide surface; 3234, sliding groove; 3235, second fitting portion; 3236, first accommodation groove; 3237, limiting end portion; 3238, second accommodation groove; 3239, first boss; 3240, first return member; 3250, second return member; 3260, headrest driving member; 3261, driving groove;

[0096] 3300, fixing seat; 3310, limiting portion; 3311, limiting wall portion; 3312, connecting ear portion; 3313, limiting pin; 3320, seat body portion; 3321, accommodating groove; 3330, limiting space; 3340, second boss;

[0097] 4000, backrest portion; 4100, backrest body; 4111, backrest upper portion; 4112, backrest lower portion; 4120, backrest limiting rib; 4130, engaging member receiving portion; 4131, backrest engaging hole; 4140, retaining member driving portion; 4141, driving protrusion; 4142, recess; 4150, connecting hole; 4160, storage recess; 4161, positioning rib; 4162, storage connecting groove; 4200, cover body; 4210, elastic finger; 4211, positioning step; 4220, window; 4230, hand holding portion; 4240, cover body connecting rod; 4300, reinforcing tube; 4310, first reinforcing hole; 4320, second reinforcing hole;

[0098] 5000, height increasing seat cushion;

[0099] 5100, seat cushion body; 5111, first housing; 5112, second housing; 5113, seat cushion cavity; 5121, upper surface; 5122, lower surface; 5130, first limiting rib; 5140, second limiting rib; 5141, clamping recess; 5150, guide groove; 5151, opening; 5160, seat cushion engaging hole; 5170, handrail portion; 5171, first sleeve hole; 5172, storage recess; 5172a, storage connecting hole; 5172b, connecting groove; 5180, fitting rib; 5190, engaging opening;

[0100] 5200, connecting mechanism;5210, engaging member;5211, engaging connecting part;5212, engaging pin;5220, first operating member;5221, operating connecting part;5221a, driving groove;5222, operating block;5222a, blocking rib;5222b, first limiting hole;5222c, operating recess;5222d, limiting protrusion;5222e, operating block space;5230, fourth reset member;5231, second elastic member;5240, limiting column;

[0101] 5300, holding mechanism;5310, holding member;5311, driving part;5311a, rotating protrusion;5312, transmission part;5312a, cross bar;5312b, engaging end;5320, third reset member;5321, first elastic member;

[0102] 5400, storage cup;5410, connecting column;5420, cup connecting convex;

[0103] 6000, angle adjusting mechanism;6100, fifth reset member;6110, third elastic member;6200, second operating member;6210, rotating part;6220, sliding part;6221, foot;

[0104] 7100, first pivot;7200, second pivot;7300, third pivot;7400, gear pin.

[0105] 300, seat belt;

[0106] S, extension surface;L, left;R, right;F, front;B, back; DETAILED DESCRIPTION

[0107] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using these specific details. In other instances, well-known methods have not been described in detail in order to avoid obscuring the present application. Therefore, the present application is not intended to be limited to the following disclosed embodiments.

[0108] When a feature or element is herein referred to as being "on" another feature or element, it can be directly on the other feature or element or intervening features and / or elements can also be present. In contrast, when a feature or element is referred to as being "directly on" another feature or element, there are no intervening features or elements present. It will also be appreciated by those of skill in the art that references to a feature or element can refer to a feature or element that is a combination of two or more features or elements. It will also be appreciated by those of skill in the art that references to a feature or element can refer to features or elements that are integrated with, or separate from, one another.

[0109] Although the terms "first" and "second" can be used herein to describe various features or elements, these features or elements should not be limited by these terms, unless otherwise specifically stated. These terms can be used to distinguish one feature or element from another feature or element. Thus, a first feature or element discussed below could be termed a second feature or element, and similarly, a second feature or element discussed below could be termed a first feature or element. As used herein, the term "plurality" means at least two, for example, two, three, and the like, unless otherwise specifically defined. The term "one" or "an" or similar referents do not necessarily limit the quantity to one. The term "including" or "comprising" or similar referents is intended to mean that the elements or objects in the list are present, but not excluding other elements or objects not expressly listed. The term "connected" or "coupled" or similar referents is intended to mean that the connected or coupled element or object is either directly connected, or coupled, to the connecting or coupling element or object or that intervening elements or objects are present. "Position" or "positioning" or similar referents are not necessarily limited to absolute position, but can also include relative position. Unless otherwise specifically stated, the terms "up", "down", "vertical", "horizontal", and the like, are used herein for ease of description only.

[0110] In the present disclosure, "front" refers to the side of the child safety seat facing away from the backrest when the child safety seat is secured to a seat of a vehicle, "rear" refers to the side of the child safety seat facing the backrest when the child safety seat is secured to a seat of a vehicle, "left" refers to the side located on the left when looking from the rear side to the front side of the child safety seat, and "right" refers to the side located on the right when looking from the rear side to the front side of the child safety seat. Other orientation terms mentioned in the present disclosure also have similar meanings. It should be noted that, unless otherwise specified and limited, the orientation terms such as "front", "rear", "left", "right" in the present disclosure are based on the orientation shown in the drawings. When the components of the child safety seat are rotated, the orientation terms will change accordingly. The "left" and "right" directions are schematically shown by arrows L and R in the drawings, and the "front" and "rear" directions are schematically shown by arrows F and B. These orientation terms are only used to make the description of the embodiments of the present utility model more clear, and are not used to improperly limit the protection scope of the present utility model.

[0111] Figures 1 to 4 A child safety seat 10 according to an embodiment of the present utility model is schematically shown. The child safety seat 10 comprises a base 200 and a seat assembly 100 arranged on the base 200. The seat assembly 100 is capable of angular adjustment relative to the base 200. In use, the seat assembly 100 is placed on a seat of a vehicle together with the base 200 for use. In some other embodiments, the child safety seat 10 can not be provided with the base 200. In use, the seat assembly 100 can be directly placed on a seat of a vehicle for use.

[0112] The seat assembly 100 comprises a backrest portion 1000, a seat portion 2000, and a headrest portion 3000. The seat portion 2000 is arranged on the backrest portion 1000. The headrest portion 3000 is movably arranged on the backrest portion 1000. In particular, the headrest portion 3000 is arranged on the backrest portion 1000 such that the headrest portion 3000 is capable of height adjustment relative to the backrest portion 1000.

[0113] In the present embodiment, the seat portion 2000 is detachably connected to the backrest portion 1000. The seat portion 2000 has a first mode of use connected to the backrest portion 1000 for use together with the backrest portion 1000, and a second mode of use separated from the backrest portion 1000 for use alone. In the first mode of use, the seat portion 2000 and the backrest portion 1000 together define a seating space of the child safety seat 10, and a child is restrained in the seating space by the seat belt 300. The first mode of use is suitable for children of a smaller age group (e.g. one to four years old), and the child safety seat 10 in this mode can be a forward-facing child seat or a rear-facing child seat. In the second mode of use, the seat portion 2000 and the backrest of the vehicle seat together define a seating space of the seat portion 2000, and a child is restrained in the seating space by the seat belt of the vehicle seat. The second mode of use is suitable for children of a larger age group (e.g. four to twelve years old), and the seat portion 2000 in this mode can be used in a forward-facing manner. By the detachable seat portion 2000, the child safety seat 10 has multiple modes of use to meet the use requirements of children of different age groups, and the use rate of the child safety seat 10 is improved. In particular, the seat portion 2000 can lift a child sitting thereon to a suitable height so that the seat belt of the vehicle seat can be properly worn on the child. Such a seat portion is also known as a "booster seat" or a "child booster seat".

[0114] The backrest portion 1000 includes a backrest body 1100 having opposite front and back faces 1110 and 1120. The seat portion 2000 is connected to the backrest body 1100, and an upper surface of the seat portion 2000 forms a seating surface 2100 adapted for a child to sit on. The front face 1110 of the backrest body 1100 and the seating surface 2100 of the seat portion 2000 together define a seating space. The longitudinal direction of the backrest body 1100 is generally perpendicular to the seating surface 2100 of the seat portion 2000. In the present embodiment, the seat portion 2000 is inclined to the base 200, and in particular, the seating surface 2100 of the seat portion 2000 is inclined to the lower surface of the base 200. The lower surface of the base 200 is generally parallel to a horizontal plane. Accordingly, the longitudinal direction of the backrest body 1100, which is generally perpendicular to the seating surface 2100 of the seat portion 2000, is inclined with respect to the vertical direction, such that the longitudinal direction of the backrest body 1100 forms an acute angle with the rearward direction F. In addition, in order to clearly show the glide slot 1200 of the front face 1110 of the backrest body 1100, a portion of the seat belt 300 and the headrest portion 3000 including the belt passage 3130 are omitted in Figure 1 and Figure 2 The complete structure of the headrest portion 3000 will be shown in Figures 8 to 10 .

[0115] As Figure 3 andFigure 4 As shown, the backrest body 1100 is provided with a sliding groove 1200 and a plurality of position ribs 1300 arranged on both sides of the sliding groove 1200. The sliding groove 1200 extends along the longitudinal direction of the backrest body 1100 and is arranged through the backrest body 1100, that is, the sliding groove 1200 extends substantially in the height direction of the backrest body 1100 and is arranged through the front surface 1110 and the back surface of the backrest body. The plurality of position ribs 1300 are arranged on both sides of the sliding groove 1200 respectively and extend along the longitudinal direction of the backrest body 1100. A plurality of position grooves 1400 are formed on the plurality of position ribs 1300 and are distributed along the longitudinal direction of the backrest body 1100. The sliding groove 1200 is used for the headrest part 3000 to slide along the longitudinal direction of the backrest body 1100 to adjust the height of the headrest part 3000, and the plurality of position grooves 1400 are used for locking the headrest part 3000 at the corresponding height. The structure of the headrest part 3000 will be described in detail later.

[0116] The number of the sliding grooves 1200 is two, but is not limited to this. In the embodiment, the two sliding grooves 1200 are a first sliding groove 1210 and a second sliding groove 1220 respectively. The plurality of position ribs 1300 include a first position rib 1310, a second position rib 1320 and a third position rib 1330, the first position rib 1310, the second position rib 1320 and the third position rib 1330 are arranged at intervals, and the third position rib 1330 is located between the first position rib 1310 and the second position rib 1320. The sliding groove 1200 is formed between the third position rib 1330 and the first position rib 1310 and between the third position rib 1330 and the second position rib 1320 respectively. That is, the third position rib 1330 is located between the two sliding grooves 1200. The first position rib 1310 is located on the side (for example, the left side of the first sliding groove 1210) of one of the two sliding grooves 1200 opposite to the third position rib 1330. The second position rib 1320 is located on the side (for example, the right side of the second sliding groove 1220) of the other of the two sliding grooves 1200 opposite to the third position rib 1330. In the embodiment, the side surface of each position rib 1300 partially forms the side wall of the corresponding sliding groove 1200.

[0117] In some alternative embodiments, the number of gear ribs 1300 can be one, two or more than three, and the number of sliding grooves 1200 can be one or more than two, which are not limited in the present application. For example, the number of gear ribs 1300 and the number of sliding grooves 1200 are both one, and the gear ribs 1300 are located on one side (for example, the left side or the right side) of the sliding groove 1200. For example, the number of gear ribs 1300 is two, and the number of sliding grooves 1200 is one, and the two gear ribs 1300 are respectively located on the left and right sides of the sliding groove 1200. For example, the number of gear ribs 1300 is more than three, and the number of sliding grooves 1200 is two or more than two, and the sliding grooves 1200 are formed between the adjacent two gear ribs 1300.

[0118] With reference to Figure 5 And Figure 6 The opening direction of each gear groove 1400 faces away from the headrest body 3100. Specifically, the opening is roughly backward and slightly downward inclined. More specifically, each gear groove 1400 has an upper side wall 1410, a lower side wall 1420 and a bottom wall 1430. The bottom wall 1430 is an arc surface. The lower side wall 1420 is inclined to the bottom wall 1430 and the included angle between the lower side wall 1420 and the bottom wall 1430 is obtuse. Specifically, the lower side wall 1420 is a downward inclined inclined surface. The upper side wall 1410 is arc-shaped and smoothly transitions to the bottom wall 1430. The upper side wall 1410 is provided with a limiting convex 1411 near the opening position of the gear groove 1400. The limiting convex 1411 is downwardly protruding on the upper side wall 1410. It should be noted that the "included angle between the lower side wall 1420 and the bottom wall 1430 is obtuse" refers to the included angle between the tangent plane of the bottom wall 1430 at the lowest point in the direction perpendicular to the longitudinal direction and the lower side wall 1420 is obtuse.

[0119] With reference to Figure 3 And Figure 4 Each gear groove 1400 is formed on the plurality of gear ribs 1300. In other words, each gear groove 1400 includes a plurality of gear recesses formed on the plurality of gear ribs 1300, respectively, and the plurality of gear recesses are spaced apart from each other. Specifically, the plurality of gear recesses include a first gear recess 1400a formed on the first gear rib 1310, a second gear recess 1400b formed on the second gear rib 1320, and a third gear recess 1400c formed on the third gear rib 1330. That is, each gear groove 1400 includes the first gear recess 1400a, the second gear recess 1400b and the third gear recess 1400c which are spaced apart from each other. In the present embodiment, the plurality of gear recesses are located on the same straight line. In an alternative embodiment, the plurality of gear recesses can not be located on the same straight line, which is not limited in the present application.

[0120] Figures 8 to 10A headrest part 3000 according to an embodiment of the present application is schematically shown. The headrest part 3000 comprises a headrest body 3100 and a headrest adjusting mechanism 3200. In combination with reference to Figure 3 and Figure 4 It is shown that the headrest adjusting mechanism 3200 is disposed between the headrest body 3100 and the backrest body 1100. It is noted that "the headrest adjusting mechanism 3200 is disposed between the headrest body 3100 and the backrest body 1100" should be understood as that at least a part of the headrest adjusting mechanism 3200 is located between the headrest body 3100 and the backrest body 1100, and the headrest adjusting mechanism 3200 is connected with the headrest body 3100 and the backrest body 1100 respectively. The headrest adjusting mechanism 3200 comprises a sliding member 3230, a headrest engaging member 3210, a headrest driving member 3260 and a headrest operating member 3220. The headrest body 3100 is slidably connected with the backrest body 1100 through the sliding member 3230. The headrest engaging member 3210 is movably connected with the sliding member 3230. The headrest operating member 3220 is movably disposed on the headrest body 3100 and connected with the headrest engaging member 3210 through the headrest driving member 3260. The headrest operating member 3220 can be operated to drive the headrest driving member 3260 to move, so as to drive the headrest engaging member 3210 to move relative to the sliding member 3230 through the headrest driving member 3260, to allow the headrest engaging member 3210 to switch between a headrest locking position and a headrest releasing position. When the headrest engaging member 3210 is located at the headrest locking position (refer to Figure 3 and Figure 4 ), the headrest engaging member 3210 is adapted to engage with the backrest body 1100 to limit the relative sliding between the sliding member 3230 and the backrest body 1100, so as to lock the headrest part 3000 (i.e. the headrest body 3100) at a corresponding height. When the headrest engaging member 3210 is located at the headrest releasing position, the headrest engaging member 3210 is disengaged from the backrest body 1100 to allow the sliding member 3230 to slide relative to the backrest body 1100, so as to allow the headrest part 3000 (i.e. the headrest body 3100) to be adjusted in height.

[0121] The headrest engaging member 3210 includes a headrest engaging rod 3211 extending substantially along the left-right direction (i.e., L-R direction) and substantially perpendicular to the longitudinal direction of the backrest body 1100. The headrest engaging rod 3211 is substantially circular in cross section. The headrest engaging rod 3211 is adapted to engage with at least one of the plurality of gear slots 1400 to restrict the relative sliding between the sliding member 3230 and the backrest body 1100. The sliding member 3230 is fixedly arranged on the headrest body 3100 and is provided with a sliding slot 3234. The sliding slot 3234 extends perpendicular to the extending direction of the headrest engaging rod 3211 and substantially perpendicular to the longitudinal direction of the backrest body 1100, that is, the extending direction of the sliding slot 3234 is substantially perpendicular to the extending direction of the sliding slot 1200. The headrest engaging rod 3211 is arranged in the sliding slot 3234 and is slidable along the extending direction of the sliding slot 3234. The headrest body 3100 and the headrest engaging rod 3211 are respectively arranged on opposite sides of the backrest body 1100. The headrest engaging rod 3211 at least partially extends out of the sliding member 3230 to engage with one of the plurality of gear slots 1400. When the headrest engaging member 3210 is in the headrest locking position, the headrest engaging rod 3211 engages with one of the plurality of gear slots 1400. The headrest engaging rod 3211 is adapted to be stopped by the upper side wall 1410 of the gear slot, thereby restricting the movement of the headrest engaging rod 3211 along the longitudinal direction of the backrest body 1100, and further restricting the movement of the sliding member 3230 along the longitudinal direction of the backrest body 1100, and further locking the headrest 3000 at the corresponding height. The upper side wall 1410 is further provided with a limiting protrusion 1411 adapted to stop the headrest engaging rod 3211 to avoid the headrest engaging rod 3211 from accidentally coming out of the opening of the gear slot 1400. When the headrest engaging member 3210 is switched to the headrest releasing position, the sliding member 3230 is disengaged from the plurality of gear slots 1400, and the headrest engaging member 3210 is movable along the longitudinal direction of the backrest body 1100, thereby allowing the sliding member 3230 to move along the longitudinal direction of the backrest body 1100, and further allowing the headrest 3000 to be adjusted in height.

[0122] With reference to Figure 3 and Figure 4 , the part of the headrest engaging rod 3211 extending out of the sliding member 3230 is engaged with the first gear recess 1400a, the second gear recess 1400b and the third gear recess 1400c of the corresponding gear slot 1400. With reference to Figure 6 and Figure 7Each of the gear grooves 1400 has a downwardly inclined slope, and an end of the slope is formed with a stop protrusion 1421 for blocking the headrest engaging rod 3210 from sliding off the slope. Specifically, the lower side wall 1420 of the third gear recess 1400c is formed with the stop protrusion 1421, which has a flat surface arranged opposite to the upper side wall 1410, and the flat surface of the stop protrusion 1421 is substantially parallel to the horizontal plane, that is, the flat surface of the stop protrusion 1421 is substantially parallel to the front-rear direction (i.e., the F-B direction) and the left-right direction (i.e., the L-R direction). A portion of the headrest engaging rod 3211 is engaged in the third gear recess 1400c and placed on the stop protrusion 1421, so that the headrest engaging rod 3211 can be prevented from being pulled out of the corresponding gear groove 1400 along the lower side wall 1420 of the gear groove 1400.

[0123] With reference to Figure 5 and Figure 6 At least a portion of the headrest body 3100 is slidably arranged on the front face 1110 of the backrest body 1100, and the sliding member 3230 is slidably arranged on the back face 1120 of the backrest body 1100 and connected to the headrest body 3100 through the sliding groove 1200, so that the headrest body 3100 and the sliding member 3230 can be synchronously slid relative to the backrest body 1100 or synchronously positioned at corresponding heights. The headrest body 3100 is provided with a mounting portion 3120. The mounting portion 3120 protrudes rearward from the back face 3112 of the headrest body and at least a portion of the mounting portion 3120 extends into the sliding groove 1200 and can move along the sliding groove 1200. Alternatively, the mounting portion 3120 is integrally formed on the headrest body 3100, or fixed (i.e., not detachable) on the headrest body 3100 by, for example, adhesion, or detachably arranged on the headrest body 3100 by, for example, screw connection, and the like, which is not limited in the present application. Figure 8 and Figure 9 The sliding member 3230 is detachably connected to the mounting portion 3120 by, for example, screw connection, clamping, or the like. The side of the headrest body 3100 facing the backrest body 1100 is formed as the back face 3112 of the headrest body, and the side of the headrest body 3100 opposite to the back face is formed as the front face 3111 of the headrest body.

[0124] With reference to Figure 7The backrest body 1100 is provided with a first matching part 1500, and the extension direction of the first matching part 1500 is parallel to the extension direction of the sliding groove 1200. The sliding part 3230 is provided with a second matching part 3235. One of the first matching part 1500 and the second matching part 3235 is a groove, and the other of the first matching part 1500 and the second matching part 3235 is a convex rib. The first matching part 1500 and the second matching part 3235 are matched in concave-convex mode, so that the sliding part 3230 slides along the extension direction of the first matching part 1500 relative to the backrest body 1100. In the embodiment, the first matching part 1500 is a groove, and the second matching part 3235 is a convex rib. The back surface 1120 of the backrest body is provided with at least one group of first matching parts 1500, and the number of each group of first matching parts 1500 is at least two. At least one first matching part 1500 is arranged on the left and right sides of the sliding groove 1200. More specifically, the number of groups of first matching parts 1500 corresponds to the number of sliding grooves 1200, and one first matching part 1500 is arranged on each side of each sliding groove 1200, that is, the number of each group of matching parts is two. In the embodiment, each group of first matching parts 1500 is located between two adjacent gear ribs 1300. Specifically, one of the two groups of first matching parts 1500 is located between the first gear rib 1310 and the third gear rib 1330, and the other of the two groups of first matching parts 1500 is located between the second gear rib 1320 and the third gear rib 1330.

[0125] Correspondingly, the number of sliding parts 3230 matches the number of sliding grooves 1200. In the embodiment, the number of sliding parts 3230 is two, and two sliding parts 3230 are arranged corresponding to the first sliding groove 1210 and the second sliding groove 1220 respectively. Each sliding part 3230 is provided with two second matching parts 3235. Each second matching part 3235 is clamped with a corresponding first matching part 1500, so that the sliding part 3230 slides along the first matching part 1500 relative to the backrest body 1100, thereby realizing the sliding of the sliding part 3230 relative to the backrest body 1100.

[0126] For the convenience of description, the sliding part 3230 located at the second sliding groove 1220 is taken as an example for description.

[0127] For the convenience of description, the sliding part 3230 located at the second sliding groove 1220 is taken as an example for description. Figure 3 、 Figure 8 and Figure 9The sliding member 3230 is slidably engaged with the sliding groove 1200 provided on the backrest body 1100 and is fixedly connected with the headrest body 3100. The backrest body 1100 is provided with a reinforcing rod 1700 for winding the seat belt, the reinforcing rod 1700 is located above the sliding groove 1200, and the sliding member 3230 has a housing 3231 which is at least partially arranged in the sliding groove 1200. The headrest body 3100 is provided with a seat belt passage 3130 which is adapted for the seat belt 300 of the child safety seat 10 to pass through, and at least a part of the housing 3231 is located above the seat belt passage 3130. In other words, the upper and lower sides of the sliding member 3230 are respectively provided with the reinforcing rod 1700 and the seat belt passage 3130. The seat belt 300 which passes through the seat belt passage 3130 winds around the reinforcing rod 1700 after passing around the sliding member 3230. In this embodiment, the seat belt passage 3130 is in communication with the sliding groove 1200 to allow the seat belt 300 to pass through the seat belt passage 3130 to the back surface 1120 of the backrest body. The seat belt 300 passes out of the seat belt passage 3130 below the sliding member 3230, winds around the reinforcing rod 1700 above the sliding member 3230, and then passes into the reinforcing rod 1700 from the side of the reinforcing rod 1700 facing the backrest body 1100. The seat belt 300 winds around the reinforcing rod 1700 from the side of the reinforcing rod 1700 facing the backrest body 1100 to the side of the reinforcing rod 1700 away from the backrest body 1100. That is, the seat belt 300 winds around the reinforcing rod 1700 from the inside of the reinforcing rod 1700 to the outside of the reinforcing rod 1700.

[0128] The line between the reinforcing rod 1700 and the seat belt passage 3130 passes through the housing 3231, so that the seat belt 300 arranged between the reinforcing rod 1700 and the seat belt passage 3130 can press against the housing 3231. In this way, by changing the extending direction of the seat belt 300 using the relative position relationship between the reinforcing rod 1700 and the seat belt passage 3130, the seat belt 300 can partially press against the sliding piece 3230, thereby generating pressure on the sliding piece 3230. The pressure can be decomposed into two pressure components, a vertical upward pressure component and a horizontal forward pressure component, and the vertical upward pressure component is transmitted to the headrest engaging rod 3211 through the sliding piece 3230, so that the headrest engaging piece 3210 can be more stably retained in the gear slot 1400, thereby avoiding the situation that the headrest engaging piece 3210 is accidentally disengaged from the gear slot 1400 due to bumps and the like, and then re-engaged in a relatively lower gear slot 1400 (i.e., a gear slot 1400 relatively close to the seat portion 2000), so that the headrest portion 3000 slides from a relatively higher position (i.e., a position relatively far away from the seat portion 2000) to a relatively lower position (i.e., a position relatively close to the seat portion 2000).

[0129] With reference to Figures 5 to 6 The sliding piece 3230 includes a housing 3231 having a rear surface facing away from the backrest body 1100. The rear surface of the housing 3231 is substantially parallel to the back surface 1120 of the backrest body 1100. At least a portion of the reinforcing rod 1700 is located between the extension surface of the housing 3231 and the backrest body 1100, so that the seat belt 300 can partially press against the sliding piece 3230. That is, at least a portion of the reinforcing rod 1700 is located in front of the housing 3231. That is, the most forward point of the reinforcing rod 1700 deviates from the extension surface of the housing 3231 and is located between the extension surface of the housing 3231 and the backrest body 1100. In this way, when the seat belt 300 passes through the sliding piece 3230 and is arranged around the reinforcing rod 1700, the extending direction of the seat belt 300 is offset by the abutment of the seat belt 300 by the sliding piece 3230 and the reinforcing rod 1700, respectively, so that a portion of the seat belt 300 can press against the sliding piece 3230.

[0130] Specifically, the axis of the reinforcing rod 1700 (i.e. the central axis of the reinforcing rod 1700) is located in front of the extension plane S of the rear surface of the housing 3231. More specifically, the extension plane S of the rear surface of the housing 3231 passes through the reinforcing rod 1700. In other words, the projections of the reinforcing rod 1700 and the sliding member 3230 on a plane perpendicular to the rear surface of the housing 3231 partially overlap. More specifically, a portion of the reinforcing rod 1700 is located in front of the extension plane S of the housing 3231, and another portion of the reinforcing rod 1700 is located behind the extension plane of the housing 3231, i.e. the reinforcing rod 1700 protrudes rearwardly from the housing 3231. In this way, the seat belt 300 can be buckled on the sliding member 3230, and the seat belt 300 can also pass around the reinforcing rod 1700 and be away from the sliding member 3230 without interfering with the sliding member 3230.

[0131] With reference to Figure 12 The lower end of the rear surface of the housing 3231 has a guide surface 3233, which is a slope or a convex cylindrical surface. The sliding member 3230 has an upper side surface 3232 facing the reinforcing rod 1700. Accordingly, the transition between the housing 3231 and the upper side surface 3232 (i.e. the upper end of the housing 3231) is provided with the guide surface 3233. A portion of the seat belt 300 is buckled on the guide surface 3233 and can slide along the guide surface 3233. The guide surface 3233 can reduce the friction between the seat belt 300 and the sliding member 3230, making it easier to pull the seat belt. With reference to Figure 5 And Figure 6 The reinforcing rod 1700 includes a rod body 1710 and a rotating sleeve 1720 rotatably sleeved on the rod body 1710, and the seat belt 300 is adapted to be wound around the rotating sleeve 1720. In this way, the seat belt 300 can be pulled more easily.

[0132] As can be seen from the above, the adjacent two gear ribs 1300 are provided with a sliding member 3230 capable of moving along the sliding groove 1200. That is, the first gear rib 1310 and the third gear rib 1330, and the second gear rib 1320 and the third gear rib 1330 are respectively provided with a sliding member 3230 capable of moving along the sliding groove 1200.

[0133] With reference to Figures 4 to 6In an embodiment, the rear surface of the housing 3231 of each slider 3230 is substantially rearwardly protruded from the outer side surface of the adjacent gear rib 1300. The sliding groove 1200 is provided with a plurality of protrusions 1600 on both sides thereof, and the plurality of protrusions 1600 are respectively located above and / or below the gear slot 1400. The rear surface of each protrusion 1600 is rearwardly protruded from the outer side surface of the adjacent gear rib 1300 and the rear surface of the housing 3231 of the corresponding slider 3230. Each gear rib 1300 has a first end and a second end located below the first end, that is, each gear rib 1300 has a second end close to the seat portion 2000 and a first end away from the seat portion 2000. The plurality of protrusions 1600 are respectively arranged at the first end and / or the second end of the plurality of gear ribs 1300. For a better understanding of the arrangement of the plurality of protrusions 1600, please refer to the following description in combination with the accompanying drawings. Figure 3 The plurality of protrusions 1600 include first protrusions 1610 arranged at the first ends of the plurality of gear ribs 1300 and second protrusions 1620 arranged at the second ends of the plurality of gear ribs 1300, but are not limited thereto. Specifically, the first ends of the first gear rib 1310, the second gear rib 1320 and the third gear rib 1330 are respectively provided with the first protrusions 1610. The second ends of the first gear rib 1310 and the second gear rib 1320 are respectively provided with the second protrusions 1620, and the second end of the third gear rib 1330 is not provided with the second protrusion 1620. In this way, on the one hand, the protrusions 1600 can limit and stop the headrest clamping rod 3211, preventing the headrest clamping rod 3211 from being pulled out of the plurality of gear slots 1400; on the other hand, the protrusions 1600 can limit and stop the seat belt 300 that is hung down after bypassing the reinforcing rod 1700, limiting the seat belt 300 between the adjacent two gear ribs 1300 to avoid the interference of the seat belt 300 with the gear ribs 1300.

[0134] For a better understanding of the arrangement of the plurality of protrusions 1600, please refer to the following description in combination with the accompanying drawings. Figures 10 to 11 The headrest operating member 3220 is movably arranged on the headrest body 3100. In the present embodiment, the headrest operating member 3220 is movably arranged on the headrest body 3100 through the fixing seat 3300. The longitudinal direction of the headrest body 3100 is substantially parallel to the longitudinal direction of the backrest body 1100, and the moving direction of the headrest operating member 3220 is substantially perpendicular to the moving direction of the headrest clamping rod 3211.

[0135] The headrest operating member 3220 includes an operating portion 3221, a connecting arm 3222, and an operating connecting portion 3223. The operating portion 3221 is connected to the connecting arm 3222 through the operating connecting portion 3223. The connecting arm 3222 is connected to the headrest driving member 3260. In other words, the operating portion 3221, the operating connecting portion 3223, the connecting arm 3222, and the headrest driving member 3260 are connected in sequence. The number of the headrest driving members 3260 corresponds to the number of the sliding members 3230. In the present embodiment, the headrest operating member 3220 has two headrest driving members 3260, two connecting arms 3222, one operating connecting portion 3223, and one operating portion 3221, the two headrest driving members 3260 are drivingly connected to the headrest engaging member 3210 and connected to the operating connecting portion 3223 through the two connecting arms 3222. The operating portion 3221 moves the two headrest driving members 3260 through the two connecting arms 3222. The headrest operating member 3220 moves substantially along the longitudinal direction of the headrest body 3100, that is, the operating portion 3221 moves along the longitudinal direction of the headrest body 3100 and moves the two headrest driving members 3260 along the longitudinal direction through the operating connecting portion 3223 and the two connecting arms 3222.

[0136] With reference to Figure 10 and Figure 11As shown, the operation part 3221 is movably arranged on the front face 3111 of the headrest body 3100. The operation connecting part 3223 is limited on the headrest body 3100 by the fixing seat 3300 and can move together with the operation part 3221 relative to the headrest body 3100, so as to slidably limit the headrest operation piece 3220 on the headrest body 3100. The operation connecting part 3223 is generally plate-shaped. The operation connecting part 3223 is arranged parallel to the front face of the headrest body 3100. The fixing seat 3300 is fixed on the headrest body 3100 by, for example, threaded connection, clamping or the like, but is not limited thereto. The fixing seat 3300 is provided with a limiting part 3310 which is detachably connected to the front face 3111 of the headrest body. Specifically, the limiting part 3310 has a limiting wall part 3311, two connecting lug parts 3312 arranged on the limiting wall part 3311 and a limiting pin 3313 connected to the limiting wall part 3311. The limiting wall part 3311 is detachably connected to the headrest body 3100 through the two connecting lug parts 3312. The limiting pin 3313 extends generally downward and is used to detachably connect with the headrest body 3100. In the present embodiment, the operation connecting part 3223 is arranged between the limiting wall part 3311 and the headrest body 3100 and is limited between the limiting wall part 3311 and the headrest body 3100 by the limiting pin 3313 and the headrest body 3100. Specifically, the headrest body 3100 is provided with an adapting part 3150, the operation connecting part 3223 has a connecting opening 3227, and the adapting part 3150 is exposed from the connecting opening 3227 to connect with the limiting pin 3313. The limiting pin 3313 is clamped with the adapting part 3150 through the connecting opening 3227.

[0137] The fixing seat 3300 is further provided with a seat body part 3320 which is connected with the limiting wall part 3311 and forms a limiting space 3330. The limiting part 3310 can be integrally formed on the seat body part 3320, or fixedly (i.e. not detachably) connected to the seat body part 3320, or detachably connected to the seat body part 3320, and the present application does not limit this. The operation part 3221 is located between the seat body part 3320 and the limiting wall part 3311, and the operation part 3221 protrudes rearwardly from the operation connecting part 3223, which facilitates the operation of the operation part 3221 and can prevent the operation part 3221 from passing the limiting wall part 3311 by using the limiting wall part 3311 to block the operation part 3221, so as to limit the operation part 3221 in the limiting space 3330.

[0138] In combination with reference to Figure 9 and Figure 10As shown, the connecting arm 3222 extends along the longitudinal direction of the headrest body 3100. The headrest body 3100 is provided with a penetrating channel 3140, the connecting arm 3222 penetrates in the penetrating channel 3140, and at least a part of the headrest driving member 3260 extends out of the penetrating channel 3140, so that the headrest driving member 3260 can be drivingly connected with the headrest engaging rod 3211 located at the back surface 3112 of the headrest body. The penetrating channel 3140 penetrates through the mounting portion 3120.

[0139] With reference to Figure 5 and Figure 6 , the headrest driving member 3260 is drivingly connected with the headrest engaging rod 3211, so as to drive the headrest engaging rod 3211 to move along the front-back direction. Specifically, each headrest driving member 3260 is provided with a driving groove 3261. The included angle between the driving groove 3261 and the moving direction of the headrest operating member 3220 is an acute angle, and the included angle between the driving groove 3261 and the sliding groove 3234 is an acute angle, and the headrest engaging rod 3211 penetrates in the sliding groove 3234 and the driving groove 3261. In this embodiment, the headrest engaging rod 3211 is driven to move along the driving groove 3261 and the sliding groove 3234 by the blocking of the groove walls of the driving groove 3261 and the sliding groove 3234, so as to drive the headrest engaging rod 3211 to move along the front-back direction between the headrest locking position and the headrest releasing position, and further to realize the locking or unlocking of the headrest body 3100, so as to adjust the height of the headrest body 3100. At least a part of the headrest driving member 3260 extends into the sliding member 3230 and is provided with the driving groove 3261, which is opposite to the sliding groove 3234 provided on the sliding member 3230. With reference to Figure 8 and Figure 9 , the headrest engaging rod 3211 penetrates through the sliding groove 3234 and the driving groove 3261 and extends out of the sliding member 3230.

[0140] With reference to Figure 5 , Figure 6 and Figure 12 , the sliding member 3230 is provided with a first containing groove 3236 and a second containing groove 3238 which are in communication with each other. The first containing groove 3236 is in communication with the sliding groove 3234. The opening of the first containing groove 3236 faces the mounting portion 3120, and the first containing groove 3236 is opposite to the penetrating channel 3140 (with reference to Figure 9In other words, the projection of the first receiving groove 3236 onto the headrest body 3100 at least partially overlaps with the through-channel 3140. At least a portion of the headrest drive member 3260 is accommodated within the first receiving groove 3236. This facilitates the insertion of the headrest drive member 3260 into the first receiving groove 3236. One end of the first receiving groove 3236 is an open end, and the other end of the first receiving groove 3236 is formed as a limiting end 3237. Specifically, the end of the first receiving groove 3236 near the second receiving groove 3238 is formed as the limiting end 3237. The first receiving groove 3236 extends longitudinally, that is, the extension direction of the first receiving groove 3236 is approximately parallel to the longitudinal direction of the backrest body 1100. At least a portion of the headrest drive member 3260 is slidably disposed within the first receiving groove 3236 and is adapted to be stopped by the limiting end 3237 to limit the travel of the headrest drive member 3260 relative to the slider 3230, in other words, to limit the travel of the headrest operation member 3220 relative to the headrest body 3100.

[0141] like Figure 5 and Figure 6 As shown, in one embodiment, the headrest adjustment mechanism 3200 further includes a first reset member 3240, which is disposed between the sliding member 3230 and the headrest drive member 3260. The first reset member 3240 is adapted to bias the headrest drive member 3260 to drive the headrest engaging rod 3211 to move towards the headrest locking position. Thus, when the headrest operating member 3220 is not operated, under the elastic restoring force of the first reset member 3240, the headrest operating member 3220 moves back to its original position and drives the headrest engaging rod 3211 to move towards the headrest locking position. Specifically, at least a portion of the headrest drive member 3260 is accommodated in a first receiving groove 3236 and is provided with an abutment surface 3225, which is a plane. The first reset member 3240 is, for example, a compression spring. One end of the first reset member 3240 is received in the second receiving groove 3238 and abuts against the end of the second receiving groove 3238. The other end of the first reset member 3240 extends into the first receiving groove 3236 and abuts against the abutment surface 3225. More specifically, the end of the second receiving groove 3238 is provided with a first boss 3239, which is disposed opposite to the abutment surface 3225. One end of the first reset member 3240 is sleeved on the first boss 3239 and abuts against the end of the second receiving groove 3238, while the other end of the first reset member 3240 abuts against the abutment surface 3225. Sleeving the first reset member 3240 on the first boss 3239 can prevent the first reset member 3240 from shifting.

[0142] In this embodiment, there is one first reset member 3240. The first reset member 3240 is disposed within a sliding member 3230 opposite to the second sliding groove 1220. In other embodiments, there may be two or more first reset members, with each sliding member 3230 containing a first reset member 3240.

[0143] like Figure 11 As shown, in one embodiment, the headrest adjustment mechanism 3200 further includes a second reset member 3250, which is disposed between the fixed base 3300 and the operating part 3221. The second reset member 3250 is adapted to bias the operating part 3221 to move and reset the headrest operating member 3220, and to drive the headrest engaging member 3210 to switch to the headrest locked position via the headrest driving member 3260 of the headrest operating member 3220. The second reset member 3250 is disposed between the base portion 3320 and the operating part 3221. The second reset member 3250 is, for example, a compression spring. The base portion 3320 is provided with a receiving groove 3321. The opening of the receiving groove 3321 faces the base portion 2000, that is, the opening of the receiving groove 3321 is approximately downward. During the operation of the headrest operating member 3220, its operating part 3221 moves into the receiving groove 3321. Specifically, the second reset member 3250 is at least partially accommodated within the receiving groove 3321, with one end of the second reset member 3250 abutting against the bottom wall of the receiving groove 3321 and the other end of the second reset member 3250 abutting against the operating part 3221. More specifically, the bottom wall of the receiving groove 3321 is provided with a second boss 3340, and the operating part 3221 is provided with a receiving recess 3226. One end of the second reset member 3250 is sleeved on the second boss 3340 and abuts against the bottom wall of the receiving groove 3321, while the other end of the second reset member 3250 is accommodated in the receiving recess 3226 and abuts against the bottom wall of the receiving recess 3226.

[0144] The operating principle of the child safety seat 10 and its headrest 3000 provided according to the embodiments of this utility model is as follows.

[0145] When the height of the headrest part 3000 needs to be adjusted, the operation part 3221 of the headrest operation member 3220 is pulled upward, and the operation part 3221 drives the headrest driving members 3260 to slide upward through the operation connecting part 3223 and the two connecting arms 3222 respectively. The two headrest driving members 3260 drive the headrest clamping rod 3211 to move backward along the sliding groove 3234 through the driving cooperation between the driving grooves 3261 arranged on the headrest driving members 3260 and the headrest clamping rod 3211, so that the headrest clamping rod 3211 exits the corresponding gear slot 1400 (that is, the headrest clamping rod 3211 moves to the headrest release position). At this time, the headrest body 3100 can be moved along the axial direction of the backrest body 1100, and the headrest body 3100 drives the sliding member and the headrest clamping rod 3211 to move together. When the headrest body 3100 moves to the required height position, the headrest clamping rod 3211 is opposite to one of the plurality of gear slots 1400. At this time, the headrest operation member 3220 is released, the headrest driving members 3260 are moved to reset under the elastic restoring force of the first reset member 3240, and the driving cooperation between the driving grooves 3261 and the headrest clamping rod 3211 drives the headrest clamping rod 3211 to move forward and be clamped with the opposite gear slot 1400. At the same time, the operation part 3221 is further moved to reset under the elastic restoring force of the second reset member 3250.

[0146] The headrest part 3000 and the child safety seat 10 having the same according to the embodiments of the present application have at least the following beneficial effects: the headrest clamping member 3210 arranged on the headrest sliding member 3230 is selectively clamped with the backrest body 1100 through the headrest operation member 3220 driving the headrest clamping member 3210 to switch between the headrest locking position and the headrest release position, so as to selectively limit or allow the relative movement between the headrest sliding member 3230 and the backrest body 1100, and further to realize the synchronous limitation or allowance of the relative movement between the headrest body 3100 and the backrest body 1100. In this way, the height adjustment of the headrest part 3000 (that is, the headrest body 3100) is realized. The headrest part 3000 provided by the embodiments of the present application has simple structure and is convenient to operate.

[0147] Figure 13 、 Figure 27 and Figure 35The child safety seat 10 according to another embodiment of the present application is schematically shown. The child safety seat 10 can be fixed on a vehicle seat by structures such as ISOFIX connectors, upper pull straps, etc., or can be fixed on a vehicle seat by vehicle safety belts configured by the vehicle. The child safety seat 10 can include a backrest part 4000 and a booster cushion 5000 according to some embodiments of the present application. The booster cushion 5000 can correspond to the seat part 2000 described in the above embodiments, that is, the seat part 2000 in the above embodiments can be replaced by the booster cushion 5000. Hereinafter, the booster cushion 5000 will be described together with the child safety seat 10.

[0148] As shown in Figure 13 , Figure 14 and Figure 28 , in some embodiments, the booster cushion 5000 is detachably connected with the backrest part 4000. The booster cushion 5000 has a first use mode of being connected to the backrest part 4000 for use together with the backrest part 4000, and a second use mode of being separated from the backrest part 4000 for use alone. In the first use mode, the booster cushion 5000 and the backrest part 4000 together define a seating space of the child safety seat 10, and a child is restrained in the seating space by a seat belt (for example, the seat belt 300 described in the above embodiments). The first use mode is suitable for children of a smaller age group (for example, one to four years old), and the child safety seat 10 in this mode can be a forward-facing child seat or a rear-facing child seat. In the second use mode, the booster cushion 5000 and the backrest of the vehicle seat together define a seating space of the booster cushion 5000, and a child can be restrained in the seating space by the safety belt of the vehicle seat. The second use mode is suitable for children of a larger age group (for example, four to twelve years old), and the booster cushion 5000 in this mode can be used forwardly. By detachably providing the booster cushion 5000, the child safety seat 10 has multiple use modes to meet the use needs of children of different age groups, thereby improving the use rate of the child safety seat 10.

[0149] Referring to Figure 14 , Figure 16 and Figure 22 , the booster cushion 5000 includes a cushion body 5100, and the cushion body 5100 includes a first shell 5111 and a second shell 5112. The first shell 5111 and the second shell 5112 are engaged to form a cushion cavity 5113 of the booster cushion 5000. The cushion body 5100 includes a fitting rib 5180, which can be provided at a rear end of the booster cushion 5000 to cooperate with the backrest body 4100 of the backrest part 4000 to define the booster cushion 5000 in a proper position.

[0150] Referring toFigure 21 、 Figure 25 and Figure 31 The booster cushion 5000 further comprises a connection mechanism 5200 and a retention mechanism 5300 housed within the cushion cavity 5113. The connection mechanism 5200 is used to detachably assemble the booster cushion 5000 into the child safety seat 10, and the retention mechanism 5300 allows the disassembled booster cushion 5000 to be switched to a snap- release state for the next use.

[0151] Referring to Figure 15 and Figure 20 The backrest portion 4000 comprises a backrest body 4100, which comprises a backrest limiting rib 4120, a snap member receiving portion 4130 and a retention member driving portion 4140 on each side of the backrest body 4100. The backrest limiting rib 4120 is proximate to the rear end of the backrest body 4100 and is used to engage the mating rib 5180 of the booster cushion 5000. The snap member receiving portion 4130 is adapted to receive the snap member 5210 of the connection mechanism 5200, which in this embodiment is a backrest snap hole 4131. The backrest limiting rib 4120, the snap member receiving portion 4130 and the retention member driving portion 4140 can also be located at other positions of the backrest body 4100. For example, the snap member receiving portion 4130 can be provided at the front end of the backrest body, or the retention member driving portion 4140 can be provided at the upper surface of the backrest body.

[0152] Referring to Figure 15 , Figure 17 and Figure 18 The retention member driving portion 4140 can protrude from the backrest body 4100. In particular, the retention member driving portion 4140 can comprise a driving tab 4141, which can gradually increase in height relative to the backrest body 4100 in the disassembly direction of the booster cushion 5000, thereby facilitating the disassembly or assembly of the booster cushion 5000 from or into the child safety seat 10. The retention member driving portion 4140 can further comprise a recess 4142 that is recessed inwardly relative to the backrest body 4100, and the driving tab 4141 is located in the recess 4142 and is able to abut against the retention mechanism 5300 when the booster cushion is assembled into the child safety seat 10, thereby driving the movement of the retention mechanism 5300 relative to the cushion body 5100.

[0153] Referring to Figure 21 , Figure 22 and Figure 23 ​The holding mechanism 5300 includes a holding member 5310 connected to the seat cushion body 5100 and a third return member 5320 disposed between the holding member 5310 and the seat cushion body 5100. The holding member 5310 includes a driving portion 5311 and a transmission portion 5312 connected to the driving portion 5311. The driving portion 5311 and the transmission portion 5312 can be integrally formed or separately manufactured and connected together. The transmission portion 5312 is used to connect the clamping mechanism 5200, and the driving portion 5311 is used to drive the holding member 5310 in the direction of holding the release position. The first elastic member 5321 is configured to bias the holding mechanism 5300 in the direction of holding the locking position. The third return member 5320 can be fixed on the seat cushion body 5100 or fixedly connected to the holding member 5310. Alternatively, the third return member 5320 can be an elastic piece formed at one end of the holding member 5310, which elastically abuts against the seat cushion body 5100 in a detachable manner.

[0154] The connecting mechanism 5200 is disposed on the seat cushion body 5100 and includes a clamping member 5210 and a first operating member 5220 connected to the clamping member 5210 and movably connected to the seat cushion body 5100. The clamping member 5210 includes a clamping connecting portion 5211 connected to the first operating member 5220 and a clamping pin 5212. The clamping pin 5212 can be integrally formed with the clamping connecting portion 5211 or separately manufactured. The clamping pin 5212 is clamped through the seat cushion clamping hole 5160 of the seat cushion body 5100 and the backrest clamping hole 4131 (see Figure 15 ) of the backrest portion 4000. In the present embodiment, the clamping member 5210 is in the form of a pin, and in fact, the clamping member 5210 can also be in other shapes, in which case the clamping member receiving portion 4130 is in a shape matched with the clamping member 5210.

[0155] Referring to Figure 15 , Figure 25 and Figure 26The first operation member 5220 can include an operation connecting portion 5221 and an operation block 5222. The operation connecting portion 5221 and the operation block 5222 can be integrally formed or separately formed. The operation block 5222 can be snap-fitted with the holding member 5310. The operation connecting portion 5221 is connected with the snap-fitting connecting portion 5211, for example, by rotation or sliding. In the present embodiment, the operation connecting portion 5221 includes a driving groove 5221a extending in a direction that is at an angle to the movement direction of the snap-fitting pin 5212 relative to the backrest snap-fitting hole 4131 for a distance. The length of the driving groove 5221a in the movement direction of the snap-fitting pin 5212 relative to the backrest snap-fitting hole 4131 is greater than or equal to the distance by which the snap-fitting pin is retracted from the backrest snap-fitting hole. In another embodiment, for example, the operation connecting portion 5221 can be a gear and chain combination (not shown), the chain being connected to the snap-fitting connecting portion 5211, and the gear being controlled to rotate by a handle, thereby causing the snap-fitting connecting portion 5211 to drive the snap-fitting pin 5212 to follow the movement of the chain engaged with the gear to pass through the seat cushion snap-fitting hole 5160 of the seat cushion main body 5100 and be inserted into the backrest snap-fitting hole 4131 on the backrest 2, thereby causing the snap-fitting member 5210 to switch between the snap-fitting locking position and the snap-fitting releasing position.

[0156] With reference to Figure 25 , Figure 26 and Figure 32 , the connecting mechanism 5200 can further include a fourth reset member 5230 that biases the snap-fitting member 5210 in the direction of the snap-fitting locking position. As shown, the fourth reset member 5230 includes a second elastic member 5231 connected to the seat cushion main body 5100. The second elastic member 5231 can be a spring or a spring sheet, and is at least partially located in an operation block space 5222e of the operation block 5222. The operation block space 5222e can be a space formed by a plate that sandwiches the movement plane of the snap-fitting pin 5212, thereby limiting the swing of the spring in the non-compression direction. One end of the second elastic member 5231 abuts against the second housing 5112, and the other end is fixed to the snap-fitting pin 5212. In Figure 32 , the snap-fitting connecting portion 5211 can be a rod integrally formed with the snap-fitting pin 5212, which can slide in the driving groove 5221a, thereby causing the snap-fitting member 5210 to switch between the snap-fitting locking position and the snap-fitting releasing position. In another embodiment, the connecting mechanism 5200 can not include the fourth reset member 5230.

[0157] With reference to Figure 20 , Figure 23 and Figure 25The driving portion 5311 of the retaining mechanism 5300 is pivotally connected to the seat cushion body 5100 via the first pivot 7100. The first housing 5111 of the seat cushion body 5100 has a guide groove 5150 formed therein and recessed towards the interior space. The guide groove 5150 has an opening 5151 formed therein. The driving portion 5311 includes a rotating lug 5311a pivotally connected to the first pivot 7100. The driving lug 4141 can protrude from the side surface of the backrest body 4100 and can be received in the guide groove 5150 and abut against the rotating lug 5311a, thereby preventing the booster seat 5000 from sliding out of the backrest body 4100 under impact (e.g., when the vehicle suddenly brakes during operation) after the engaging member 5210 fails (e.g., breaks). The driving portion 5311 can be a grid-shaped rib inclined upward, thereby increasing the friction between the backrest body 4100 and the seat cushion body 5100 and preventing the booster seat 5000 from sliding horizontally out of the backrest body 4100 under impact. The transmission portion 5312 can be connected to or integrally formed with the rotating lug 5311a. When the retaining mechanism 5300 is in the retaining locking position and the booster seat 5000 is detached from the child safety seat 10, the rotating lug 5311a protrudes out of the seat cushion cavity from the opening 5151. When the retaining mechanism 5300 is in the retaining releasing position and the booster seat 5000 is installed in the child safety seat 10, the rotating lug 5311a is received in the seat cushion cavity 5113. The rotating lug 5311a can have an inclined surface inclined towards the direction of the entrance of the guide groove 5150. When the booster seat 5000 is installed on the backrest body 4100, the driving lug 4141 presses the inclined surface, thereby driving the retaining mechanism 5300 to pivot towards the retaining releasing position and disengage from the operating block 5222.

[0158] The transmission portion 5312 can include a crossbar 5312a and the third return member 5320 can include a first elastic member 5321. As shown, the first elastic member 5321 can be a compression spring, a tension spring or a spring plate. One end of the first elastic member 5321 is fixed to the first housing 5111 of the seat cushion body 5100 and is disposed between the crossbar 5312a and the seat cushion body 5100. The crossbar 5312a can switch between abutting against the first elastic member 5321 and pushing away from the first elastic member 5321 with the movement of the driving portion 5311 relative to the seat cushion body 5100.

[0159] The transmission portion 5312 can include an engaging end 5312b, as shown, which engages with the blocking rib 5222a formed on the operating block 5222. The shape of the engaging end 5312b can be changed according to actual conditions, as long as it can engage with the operating member 322. Figure 25

[0160] As shown, Figure 19 , Figure 20 and​Figure 23 The seat cushion body 5100 can further include a first limiting rib 5130. The first limiting rib 5130 is arranged at least partially around the first elastic member 5321 in a direction perpendicular to the movement direction of the first elastic member 5321, and the height of the first limiting rib 5130 in the compression direction of the first elastic member 5321 is not greater than the maximum compression length of the first elastic member 5321.

[0161] Referring to Figure 23 , Figure 24 and Figure 25 , the operation block 5222 is formed with a first limiting hole 5222b extending a certain length along the movement direction of the first operation member 5220. The limiting post 5240 passes through the first limiting hole 5222b and is fixed in the seat cushion body 5100, thereby limiting the movement direction of the operation block 5222. In addition, the positioning of the second elastic member 5231 and the limiting post 5240 on the seat cushion body 5100 substantially defines the positioning of the first operation member 5220 in the vertical direction. The operation block 5222 can further be formed with an operation recess 5222c, and the seat cushion body 5100 includes an engaging opening 5190 exposing the seat cushion cavity 5113 outwardly, the operation recess 5222c being formed in a manner of being recessed toward the seat cushion cavity 5113 from the outside of the seat cushion body 5100, and at least a portion of the operation recess 5222c being exposed outwardly from the engaging opening 5190.

[0162] The seat cushion body 5100 includes a second limiting rib 5140 protruding relative to the seat cushion body 5100 along the movement direction of the first operation member 5220, so that the first operation member 5220 is abutted by the second limiting rib 5140 during operation without being directly pressed on the seat cushion body 5100, or causing the first operation member 5220 to rotate and lose its function.

[0163] The operation block 5222 can be formed with a limiting protrusion 5222d protruding from the side of the operation block 5222 opposite to the outwardly exposed surface of the operation recess 5222c. The second limiting rib 5140 is formed at the front end in the movement direction of the first operation member 5220 with a clamping recess 5141 matching the shape of the limiting protrusion 5222d. The limiting protrusion 5222d is clamped or unclamped with the clamping recess 5141 as the clamping member 5210 is switched between the clamping locking position and the clamping releasing position.

[0164] Referring to Figure 15 , Figure 25 and Figure 26When the height-increasing seat cushion 5000 is ready to be detached from the backrest part 4000, the hand is placed on the operation recess 5222c and force is applied upwardly to lift the first operation member 5220 upwardly along the driving slot 5221a relative to the engaging member 5210, so that the engaging member 5210 is retracted from the backrest engaging hole 4131 and biased on the second elastic member 5231 by the force applied to the engaging member 5210, so that the engaging member 5210 returns to the engaging release state. As the height-increasing seat cushion 5000 is gradually detached from the backrest part 4000, the driving protrusion 4141 is away from the driving protrusion 4141, the force applied to the cross rod 5312a is reduced until it disappears, the first elastic member 5321 pushes the cross rod 5312a away by its restoring force, and the engaging end 5312b which is integrally formed or fixedly connected with the cross rod 5312a moves towards the first operation member 5220 under the pushing force and is engaged in the blocking rib 5222a of the first operation member 5220, so as to keep the first operation member 5220 in the release position, i.e. keep the engaging member 5210 in the engaging release position. When the height-increasing seat cushion 5000 is installed into the backrest part 4000, the matching rib 5180 abuts against the backrest limiting rib 4120, and the driving protrusion 4141 in the retaining member driving part 4140 abuts against the retaining member driving part 4140, so that the driving part 5311 rotates relative to the seat cushion main body 5100 about the first pivot 7100. With the rotation of the driving part 5311, the transmission part 5312 connected with the driving part 5311 rotates, the cross rod 5312a rotates and is biased on the first elastic member 5321, and the engaging end 5312b is disengaged from the blocking rib 5222a. At this time, the spring 3231 restores the engaging pin 5212 to be inserted into the backrest engaging hole 4131 from the seat cushion engaging hole 5160, so as to allow the engaging member 5210 to switch to the engaging locking position.

[0165] In the present embodiment, the retaining mechanism 5300 changes the engagement state between the retaining mechanism 5300 and the connecting mechanism 5200 by the restoring force of the first elastic member 5321, and in fact the switching of the connection state of the retaining mechanism 5300 and the connecting mechanism 5200 can also be realized by other forces. For example, a gravity block which can slide along a slide on the seat cushion main body 5100 can be arranged on the driving part 5311, the gravity block can be rotationally connected with the transmission part 5312, when the height-increasing seat cushion 5000 and the backrest part 4000 are assembled together, the gravity block is blocked by the backrest body 4100 and slides upwardly, causing the transmission part 5312 connected with the gravity block to deflect, so that the retaining member 5310 is disengaged from the operation member 322. When the height-increasing seat cushion 5000 is detached from the backrest part 4000, the gravity block is separated from the backrest body 4100, so as to slide downwardly from the slide under the action of gravity, causing the transmission part 5312 connected with the gravity block to deflect, at this time the retaining member 5310 is engaged with the operation member 322 again.

[0166] Further, in the present embodiment, the holding mechanism 5300 rotates relative to the seat cushion body 5100 by rotating around the first pivot 7100, and substantially, the holding mechanism 5300 can slide relative to the seat cushion body 5100. Further, in the present embodiment, the state of the holding mechanism 5300 is changed by the movement of the spring relative to the seat cushion body 5100 in the length direction thereof, and substantially, the state of the holding mechanism 5300 can also be changed by the biasing force of the spring. For example, a uniform horizontal groove can be provided on both side surfaces of the seat cushion body 5100 on which the first elastic member 5321 is provided, the transmission portion 5312 is disposed between the first operating member 5220 and the first elastic member 5321, and one end of the first elastic member 5321 is provided on the seat cushion body 5100. The driving portion 5311 and the transmission portion 5312 of the holding member 5310 can synchronously slide on the groove, and the transmission portion 5312 can include a slope, and a blocking portion that is provided on the backrest body 4100 and can block the driving portion 5311. When the raised seat cushion 5000 and the backrest 4000 are assembled together from the horizontal direction, the driving portion 5311 is blocked by the blocking portion of the backrest body 4100, causing the transmission portion 5312 of the driving portion 5311 to move toward the first elastic member 5321 and press the slope thereof on the first elastic member 5321, so that the holding member 5310 and the first operating member 5220 can be disengaged. When disassembled, the driving portion 5311 is separated from the blocking portion of the backrest body 4100, and the restoring force of the first elastic member 5321 pushes the transmission portion 5312 to move toward the first operating member 5220 and engage the first operating member 5220.

[0167] Referring to Figure 16 , Figure 33 and Figure 35 , the seat cushion body 5100 can further include an armrest portion 5170. The armrest portion 5170 is provided on both sides of the seat cushion body 5100 and extends upward from the upper surface 5121 of the seat cushion body 5100 at an angle to the upper surface 5121, and forms a first sleeve hole 5171 adapted for a vehicle safety belt to pass through. The armrest portion 5170 can further include a storage recessed portion 5172 formed by a portion of the seat cushion body 5100 outside the seat cushion cavity 5113 and having a storage space. The storage recessed portion 5172 includes a storage connection hole 5172a recessed from the storage recessed portion 5172 toward the upper surface 5121 of the seat cushion body 5100 and a connection groove 5172b on the side surface of the storage recessed portion 5172.

[0168] As Figure 33 , Figure 34 and Figure 35As shown, the booster cushion 5000 further comprises at least one storage cup 5400. The storage cup 5400 comprises a connecting post 5410 protruding from the bottom of the storage cup 5400 and a cup connecting protrusion 5420 protruding from the side of the storage cup 5400. The connecting post 5410 is inserted into the storage connecting hole 5172a, and the cup connecting protrusion 5420 is clamped into the connecting slot 5172b.

[0169] Referring to Figure 17 , Figure 26 and Figure 28 , the child safety seat 10 can further comprise a base 200, a headrest 3000 and an angle adjustment mechanism 6000. In the present embodiment, the child safety seat 10 comprises the angle adjustment mechanism 6000, by adjusting which the angle of the backrest 4000 relative to the base 200 can be adjusted. In other embodiments, the backrest 4000 can not comprise the angle adjustment mechanism 6000, and / or the child safety seat 10 does not comprise the base 200, for which the present application does not limit. In addition, the booster cushion 5000 can be assembled with the base 200 directly for use by larger children. In this case, the base 200 can be provided with a base clamping portion (not shown) to clamp with the clamping member 5210 of the booster cushion 5000, and a base driving portion to drive the movement of the driving portion 5311 of the booster cushion 5000 relative to the cushion body 5100, the base clamping portion and the base driving portion are provided in the same way as the clamping member receiving portion 4130 and the retaining member driving portion 4140 of the backrest body 4100, and therefore will not be described again.

[0170] Referring to Figure 29 , Figure 30 and Figure 32 , the base 200 can comprise a base body 210, an engaging portion 230 and a pivoting portion 240. The base 200 can be integrally formed. Alternatively, the base 200 can be formed by clamping a base upper shell 201 and a base lower shell 202. The lower surface 1b can be a flat surface so as to mount the booster cushion 5000 or the child safety seat 10 on a vehicle seat. The pivoting portion 240 and the engaging portion 230 extend upward at an angle relative to the base upper surface 211 of the base body 210. The engaging portion 230 engages with the angle adjustment mechanism 6000. The pivoting portion 240 is rotatably connected with the backrest body 4100 of the backrest 4000 by a second pivot 7200. In the embodiment shown in Figure 30 , the pivoting portion 240 is triangular. The pivoting portion 240 is pivoted with the backrest body 4100 at a position approximately at the apex of the triangle. In other embodiments, the pivoting portion 240 can also be any other shape suitable for pivoting with the backrest body 4100.

[0171] Referring to Figure 28 , Figure 29 and Figure 38The angle adjusting mechanism 6000 is movably connected to the base 200 and movably connected to the backrest body 4100, so as to adjust the angle of the backrest body 4100 relative to the base 200 to meet the user's requirement for comfort, and increase the use rate of the child safety seat.

[0172] Specifically, the angle adjusting mechanism 6000 comprises a fifth reset member 6100 and a second operating member 6200. The fifth reset member 6100 can comprise a third elastic member 6110, and the third elastic member 6110 can be a spring. One end of the third elastic member 6110 abuts against the bottom of the backrest body 4100 and is movable relative to the backrest body 4100, and the other end abuts against the second operating member 6200.

[0173] The second operating member 6200 comprises a rotating part 6210 and a sliding part 6220. The rotating part 6210 is generally funnel-shaped, at least partially contains the third elastic member 6110, and is rotatably connected to the backrest body 4100 through a third pivot 7300. The sliding part 6220 can be integrally formed with or connected to the rotating part 6210. One end of the sliding part 6220 is slidable relative to the base 200.

[0174] Referring to Figure 30 and Figure 38 The base 200 comprises a gear portion 220 protruding from the base upper surface 211 of the base body 210. The top of the gear portion 220 is concave in the middle to form a circular arc-shaped recess 223, and the engaging portion 230 is formed on both sides of the recess 223. At least one, for example two, three or more angle gear slots 221 are respectively provided on both sides of the gear portion 220 along the height direction in which the gear portion 220 protrudes relative to the base 200. The angle gear slots 221 are formed at an angle inclined upward from the gear portion 220.

[0175] The sliding part 6220 is generally inverted U-shaped, and comprises two bottom feet 6221 separated on both sides and matched with the gear portion 220. The gear pin 7400 passes through the two bottom feet 6221 and is engaged on the angle gear slots 221. When a force is applied to the second operating member 6200, the second operating member 6200 rotates relative to the backrest body 4100, thereby driving the gear pin 7400 to disengage from the engagement with the angle gear slots 221 and engage with another angle gear slot 221. The gear portion 220 further comprises angle gear ribs 222 formed on both sides of the gear portion 220 and extending along the height direction in which the gear portion 220 protrudes relative to the base 200. The angle gear ribs 222 at least partially surround the angle gear slots 221 along the movement direction of the gear pin 7400, thereby stopping the gear pin 7400 in the angle gear slots 221. Referring to Figure 15 、 Figure 22 and Figure 32The backrest portion 4000 includes a reinforcing pipe 4300. The reinforcing pipe 4300 is fixedly installed in the backrest body 4100 and extends from the upper backrest portion 4111 (a portion on which a child's back is rested) to the lower backrest portion 4112 (a portion in which a hip is accommodated) of the backrest body 4100. The reinforcing pipe 4300 includes a first reinforcing hole 4310 at a position opposite to the backrest engaging hole 4131 through which the engaging member 5210 is inserted into the first reinforcing hole 4310. The reinforcing pipe 4300 can further include a second reinforcing hole 4320 at a position opposite to the second pivot 7200 which is inserted into the second reinforcing hole 4320 through the connecting hole 4150 of the backrest body 4100.

[0176] Referring to Figure 35 , Figure 36 and Figure 37 , the backrest body 4100 of the backrest portion 4000 includes a storage recess 4160 above the upper surface 5121 of the seat cushion body 5100, the storage recess 4160 being adapted to store an article. The storage recess 4160 is recessed from the backrest body 4100 to an opposite side of the backrest portion 4000 to the booster seat 5000 (a side on which a seating space is formed). The backrest portion includes a cover 4200 which is rotatably inserted into a storage connecting groove 4162 of the storage recess 4160 by a cover connecting rod 4240 and closes the storage recess 4160. The cover 4200 can have various shapes, for example, a flat shape.

[0177] The cover 4200 is formed with an elastic finger 4210 and a window 4220. The elastic finger 4210 protrudes from one end of the cover 4200 and is bent, for example, in a U shape or an L shape. The elastic finger 4210 protrudes from a side of the window 4220 toward the storage recess 4160 when the cover 4200 is closed, and includes a positioning step 4211 protruding from a surface of the elastic finger 4210 near a free end. The storage recess 4160 includes a positioning rib 4161 protruding from a storage space formed in the backrest body 4100 toward the storage recess 4160. The positioning step 4211 can be engaged on the positioning rib 4161, thereby closing the storage recess 4160.

[0178] The cover 4200 can further be formed with a hand-holding portion 4230 below the elastic finger 4210, the hand-holding portion 4230 being formed by the cover 4200 being recessed downward toward the storage recess 4160 when the cover 4200 is closed. The hand-holding portion 4230 is adapted to accommodate a hand to apply a force to the elastic finger 4210, thereby disengaging the positioning step 4211 from the positioning rib 4161, and thereby opening the cover 4200.

[0179] When the height-increasing cushion 5000 is assembled with the base 200 directly, the angle adjusting mechanism 6000 can also be provided, and the angle adjusting mechanism 6000 is pivotally connected with the lower surface 5122 (shown in Figure 18 and Figure 24 ) of the seat cushion main body 5100.

[0180] According to the child safety seat 10 and the height-increasing cushion 5000 of the above-mentioned embodiments, the height-increasing cushion 5000 is detachably connected to the backrest part 4000 through the connecting mechanism 5200, and the engaging member 5210 is kept in the release position when the height-increasing cushion 5000 is detached from the child safety seat 10 through the retaining mechanism 5300, so that the height-increasing cushion 5000 is easy to install. In addition, the angle adjusting mechanism 5400 can allow the angle of the child safety seat 10 to be adjusted, so as to meet the comfort requirements of the user using the child safety seat 10, and increase the use rate of the child safety seat 10. In addition, the connecting mechanism 5200 is simple in structure and easy to operate, and can quickly realize the detachment and installation of the height-increasing cushion 5000.

[0181] The technical features of the above-mentioned embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the above-mentioned embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0182] The above-mentioned embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A child safety seat, characterized in that, The child safety seat comprises: a safety belt; a backrest body formed with a plurality of gear slots and a rod for winding the safety belt; and a headrest movably arranged on the backrest body, the headrest comprising a headrest body and a headrest adjusting mechanism; wherein the headrest adjusting mechanism comprises: a sliding member connected to the headrest body and provided with a housing and a sliding slot; and a headrest engaging member arranged in the sliding slot and capable of moving between a headrest locking position and a headrest releasing position, when the headrest engaging member is in the headrest locking position, the headrest engaging member engages with one of the plurality of gear slots, and when the headrest engaging member switches to the headrest releasing position, the sliding member is disengaged from the plurality of gear slots, wherein the headrest body is provided with a safety belt passage, at least a part of the housing is located above the safety belt passage, and a line between the rod and the safety belt passage passes through the housing, so that the safety belt arranged between the rod and the safety belt passage can be pressed against the housing. An extension surface of a rear surface of the housing passes through the rod, so that the safety belt located in front of the rod is pressed against the sliding member, and the safety belt located behind the rod is arranged in a spaced manner with the sliding member.

2. The child safety seat of claim 1, wherein, A lower end of the rear surface of the housing has a guide surface for guiding the safety belt, the guide surface is an inclined surface or a convex cylindrical surface.

3. The child safety seat of claim 1, wherein, 4. The child safety seat according to any one of claims 1 to 3, wherein: the backrest body is provided with a sliding groove extending along the longitudinal direction of the backrest body and penetrating through the surface of the backrest body, the sliding member is slidably fitted with the sliding groove, so that at least a part of the housing is arranged in the sliding groove, the rod is located above the sliding groove, the rod comprises a rod body and a rotating sleeve rotatably sleeved on the rod body, and the safety belt is adapted to be wound on the rotating sleeve. the backrest body is provided with a first fitting part, the extension direction of the first fitting part is parallel to the extension direction of the sliding groove, the sliding member is provided with a second fitting part, one of the first fitting part and the second fitting part is a groove, the other of the first fitting part and the second fitting part is a convex rib, and the first fitting part and the second fitting part are in concave-convex fitting.

5. The child safety seat of claim 4, wherein, the backrest body is provided with a plurality of gear ribs, each of the gear slots is formed in the plurality of gear ribs at the same time, the opening direction of the plurality of gear slots faces away from the headrest body, each of the gear slots has an inclined surface inclined downward, and an end of the inclined surface is formed with a stop convex part for blocking the headrest engaging member from sliding off the inclined surface.

6. The child safety seat of any one of claims 1 to 3, wherein, ​

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