Safety seat

Abstract

The utility model relates to the technical field of child safety products, and provides a safety seat which comprises a seat back, a headrest, a base and a height adjusting assembly, the seat back is arranged on the base, and the seat back is provided with a locking groove; the height adjusting assembly comprises a locking piece, an adjusting handle, a limiting column and a reset spring, the adjusting handle is connected with the locking piece, the locking piece can be driven to be locked or unlocked when the adjusting handle slides, and the limiting column is connected with the adjusting handle; one end of the reset spring is arranged on the limiting column in a sleeving mode, the other end of the reset spring abuts against the headrest, the limiting column is provided with an avoiding part, and when the locking piece is in the unlocking state, the reset spring is compressed. The headrest is unlocked by separating the locking piece from the locking groove, after the headrest is adjusted, the locking piece is driven by resilience force of the reset spring to be clamped into the locking groove again, the limiting column is provided with the avoiding part, and therefore the situation that the reset spring collides with the edge of the end of the limiting column, and noise is generated is avoided; the problems that the headrest adjusting process is tedious and the adjusting noise is large are solved.

Description

Technical Field

[0001] The present application relates to the technical field of child safety products, and in particular to a safety seat. Background Art

[0002] Child safety seats are usually installed in cars. Their main function is to improve children's safety while riding in a car. Child safety seats have a headrest for supporting and protecting the child's head. The height of the headrest can generally be adjusted to accommodate children of different heights and weights.

[0003] At present, the headrest is fixed to the chair back through a locking mechanism, such as bolts, etc. When adjusting the headrest, it is necessary to manually unlock the locking mechanism, then move the headrest, and finally manually lock the headrest again. The adjustment method of the headrest is relatively cumbersome, and there is a problem of noise pollution during the adjustment process, which needs to be improved. Utility Model Content

[0004] The present application provides a safety seat, which can solve the problem that the headrest adjustment process is complicated and the adjustment noise is large.

[0005] The present application provides a safety seat, comprising: a seat back, a headrest and a height adjustment assembly, wherein the seat back has a locking groove; the headrest is slidably connected to the seat back; the height adjustment assembly comprises: a locking piece, an adjustment handle, a limiting column and a return spring, the adjustment handle is connected to the locking piece, and the adjustment handle is slidably connected to the headrest, the adjustment handle is configured to drive the locking piece to move when sliding so that the locking piece switches between a locked state and an unlocked state, wherein in the locked state, the locking piece is clamped in the locking groove, and in the unlocked state, the locking piece is locked in the locking groove. The locking member is configured to be movable in and out of the locking groove; the first end of the limit column is connected to the adjustment handle; one end of the return spring is sleeved on the limit column, and the other end is abutted against the headrest, and the second end of the limit column has a avoidance portion for avoiding the return spring, and the projection of the avoidance portion along the central axis direction of the limit column is completely located on the inner side of the projection of the return spring along the central axis direction of the limit column, and the outer edge of the avoidance portion is smoothly connected to the outer edges of other parts of the limit column, and the return spring is gradually compressed when the locking member is switched from the locked state to the unlocked state.

[0006] According to the safety seat provided in the present application, the height adjustment assembly also includes: a first connecting member, a second connecting member and a third connecting member, the first connecting member is connected to the headrest, and the first connecting member has an arc-shaped guide hole; the second connecting member is hinged to the adjustment handle, and the second connecting member has a plug-in portion, and the plug-in portion is at least partially located in the arc-shaped guide hole; the third connecting member is rotatably connected to the first connecting member, the third connecting member is rotatably connected to the plug-in portion, the locking member is connected to the third connecting member, and the connection portion between the third connecting member and the plug-in portion and the locking member are eccentrically arranged relative to the rotation axis of the third connecting member.

[0007] According to the safety seat provided in the present application, the locking member is a locking rod, the cross-section of the locking rod is polygonal, and a recessed portion is provided on the outer side surface of the locking rod; the third connecting member has an insertion hole, the locking rod is inserted into the insertion hole, and a convex rib abutting against the recessed portion is provided on the inner wall of the insertion hole.

[0008] According to the safety seat provided in the present application, side leaning portions are provided on both the left and right sides of the seat back, and openings are provided on the side leaning portions for the vehicle safety belt to pass through.

[0009] According to the safety seat provided in the present application, a limiting portion for limiting the waist belt of the vehicle-mounted safety belt is provided on the opening.

[0010] According to the safety seat provided by the present application, the safety seat also includes: a seat belt passer, the seat belt passer is provided on the left and right sides of the headrest, the seat belt passer includes: a passer body and a blocking piece, the passer body has a belt threading hole for the shoulder strap of the vehicle-mounted seat belt to pass through and a notch connected to the belt threading hole, the belt threading hole has a supporting portion for supporting the shoulder strap of the vehicle-mounted seat belt; the blocking piece is connected to the inner wall of the belt threading hole, and the blocking piece is located between the supporting portion and the notch.

[0011] According to the safety seat provided by the present application, the blocking sheet satisfies at least one of the following conditions:

[0012] (1) The length of the blocking piece is L, L ≥ 10 mm;

[0013] (2) The angle between the blocking piece and the supporting portion is α, 5°≤α≤20°.

[0014] According to the safety seat provided in the present application, the interior of the seat back has a cavity, and the front side of the seat back is provided with a through-hole connected to the cavity; the safety seat also includes: a seat shoulder strap and a shoulder strap adjustment assembly, one end of the seat shoulder strap is connected to the front side of the seat back, and the other end passes through the through-hole into the cavity; the shoulder strap adjustment assembly includes a locking unit, an adjustment belt and a connecting piece, the locking unit is connected to the adjustment belt and is used to lock the adjustment belt, the adjustment belt passes through the cavity and is connected to the other end of the seat shoulder strap through the connecting piece.

[0015] According to the safety seat provided in the present application, the chair back includes a chair back main body and a back panel, the back panel is arranged on the rear side of the chair back main body, and the cavity is formed between the back panel and the chair back main body; the back panel has a step on the side facing the chair back main body, and an anti-stuck component for guiding the connecting piece is provided at the step.

[0016] According to the safety seat provided in the present application, the safety seat further comprises a guide member having a guide hole for the seat shoulder belt to pass through, and the guide member is connected to the headrest.

[0017] The safety seat of the present application makes the adjustment handle slide relative to the headrest to drive the locking piece to disengage from the corresponding locking groove, thereby releasing the lock of the headrest, so that the headrest can move relative to the seat back. When the locking piece is in the unlocked state, the return spring is compressed. When the headrest completes the position adjustment, it is only necessary to release the adjustment handle, and the adjustment handle is driven by the rebound force of the return spring to drive the locking piece to be clamped into one of the locking grooves again, so that the headrest and the seat back can be re-locked. The headrest adjustment method is convenient and fast, wherein the return spring is limited and guided by the limit column. The limit column is provided with an avoidance portion to avoid the return spring from colliding with the end edge of the limit column and generating noise when it is extended and retracted, effectively solving the problem of complicated headrest adjustment process and large adjustment noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the three-dimensional structural schematic diagrams of the safety seat provided in this application;

[0020] Figure 2 The second schematic diagram of the three-dimensional structure of the safety seat provided in this application;

[0021] Figure 3A partial cross-sectional view of the safety seat provided for this application;

[0022] Figure 4 A partial schematic diagram of the safety seat provided for this application;

[0023] Figure 5 for Figure 4 A is an enlarged schematic diagram;

[0024] Figure 6 A schematic diagram of the connection between the adjustment handle and the headrest provided in this application;

[0025] Figure 7 A schematic diagram of the structure of the adjustment handle of the safety seat provided in this application;

[0026] Figure 8 A schematic diagram of the structure of a safety belt pass-through device for a safety seat provided in this application;

[0027] Fig. 9 A schematic diagram of the structure of the connecting piece of the safety seat provided in this application;

[0028] Fig.10 A schematic diagram of the structure of the back panel of the safety seat provided in this application;

[0029] Fig.11 A partial schematic diagram of the seat back of the safety seat provided in this application.

[0030] Reference numerals:

[0031] 1. Chair back; 11. Locking groove; 12. Chair back body; 13. Back plate; 131. Anti-stuck piece; 14. Side leaning part; 141. Opening; 142. Limiting part;

[0032] 2. Headrest; 21. Headrest plate; 22. Buffer;

[0033] 3. Base;

[0034] 4. Height adjustment assembly; 41. Locking member; 411. Concave portion; 42. Adjustment handle; 421. Strip hole; 422. Card slot; 43. Limiting column; 431. Avoidance portion; 44. Return spring; 45. First connecting member; 451. Arc guide hole; 46. Second connecting member; 461. Plug-in portion; 47. Third connecting member;

[0035] 5. seat belt passer; 51. passer body; 511. belt threading hole; 5111. support part; 512. notch; 52. blocking piece;

[0036] 6. Seat belt clip;

[0037] 7. Seat shoulder straps;

[0038] 8. Shoulder strap adjustment assembly; 81. Locking unit; 82. Adjustment strap; 83. Connecting piece;

[0039] 9. Guide piece;

[0040] 10. Hook. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] Combine the following Figures 1 to 11 The safety seat of the present application is described.

[0045] See also Figures 1 to 7The embodiment of the present application provides a safety seat, comprising: a seat back 1, a headrest 2, a base 3 and a height adjustment assembly 4, wherein the seat back 1 is arranged on the base 3, and the seat back 1 has a locking groove 11; the headrest 2 is slidably connected to the seat back 1; the height adjustment assembly 4 comprises: a locking member 41, an adjustment handle 42, a limiting column 43 and a return spring 44, the adjustment handle 42 is connected to the locking member 41, and the adjustment handle 42 is slidably connected to the headrest 2, and the adjustment handle 42 is configured to drive the locking member 41 to move when sliding so that the locking member 41 switches between a locked state and an unlocked state, and in the locked state, the locking member 41 is clamped in the locking groove 11 In the unlocked state, the locking piece 41 escapes from the locking groove 11; the first end of the limiting column 43 is connected to the adjusting handle 42; one end of the return spring 44 is sleeved on the limiting column 43, and the other end is in contact with the headrest 2, and the second end of the limiting column 43 has a avoidance portion 431 for avoiding the return spring 44, and the projection of the avoidance portion 431 along the central axis direction of the limiting column 43 is completely located on the inner side of the projection of the return spring 44 along the central axis direction of the limiting column 43, and the outer edge of the avoidance portion 431 is smoothly connected to the outer edges of other parts of the limiting column 43, and when the locking piece 41 switches from the locked state to the unlocked state, the return spring 44 is gradually compressed.

[0046] Specifically, the headrest 2 includes a headrest board 21 and a buffer 22 disposed on the front side of the headrest board 21. The headrest board 21 may be an arc-shaped surrounding structure so that the buffer 22 can protect the child's head from multiple angles. The buffer 22 may be made of sponge material, and the buffer 22 and the headrest board 21 may be connected by bonding.

[0047] The chair back 1 includes a chair back body 12 and a back plate 13 disposed at the rear side of the chair back body 12. The chair back body 12 is provided with a sliding track, and the headrest 2 is slidably connected to the chair back body 12 through the sliding track. A cavity is formed between the chair back body 12 and the back plate 13, a locking member 41 is disposed in the cavity, a locking groove 11 is disposed on the side of the chair back body 12 facing the back plate 13, a plurality of locking grooves 11 are provided, and the heights of the plurality of locking grooves 11 are different. In the locked state, the locking member 41 is inserted into one of the locking grooves 11, so that the headrest 2 is locked with the chair back 1.

[0048] The adjustment handle 42 is slidably disposed on the rear side of the headrest plate 21. When the adjustment handle 42 slides, it can drive the locking member 41 to move, so that the locking member 41 is stuck in or out of the locking groove 11. When the position of the headrest 2 needs to be adjusted, the adjustment handle 42 is moved to make the locking member 41 disengage from the locking groove 11, and the headrest 2 and the chair back 1 are unlocked. Then, the headrest 2 is moved to change the position of the headrest 2. When moving the headrest 2, the adjustment handle 42 needs to be moved synchronously, so that the locking member 41 is always in the unlocked state during the adjustment process, and the unlocking member can move to other locking grooves 11. Finally, the adjustment handle 42 is moved again, so that the locking member 41 is stuck in one of the other locking grooves 11, and the position of the headrest 2 can be adjusted.

[0049] Among them, when the control adjustment handle 42 is controlled to slide relative to the headrest 2 to unlock the locking piece 41, the return spring 44 will be compressed. When the position of the headrest 2 is adjusted, the adjustment handle 42 is released, and the rebound force of the return spring 44 will push the adjustment handle 42 to slide in the opposite direction, thereby driving the locking piece 41 to be stuck in the selected locking groove 11. The locking of the locking piece 41 can be automatically completed by simply releasing the adjustment handle 42.

[0050] Furthermore, the cross-section of the limit column 43 along the direction perpendicular to its axial line is circular, and the two opposite ends of the limit column 43 are respectively a first end and a second end. The first end of the limit column 43 is connected to the adjusting handle 42, and the second end is provided with an avoidance portion 431. The diameter at the avoidance portion 431 is smaller than the diameter of other parts of the limit column 43, and the diameter of the avoidance portion 431 gradually decreases along the direction from the first end to the second end, thereby preventing the return spring 44 from contacting the edge of the second end of the limit column 43 during extension and contraction, thereby generating noise; in addition, the outer edge of the avoidance portion 431 and the outer edges of other parts of the limit column 43 have a smooth transition, thereby avoiding the formation of steps that cause contact with the return spring 44 and generate noise.

[0051] The safety seat of the present application makes the adjustment handle 42 slide relative to the headrest 2 to drive the locking piece 41 to disengage from the corresponding locking groove 11, thereby releasing the lock of the headrest 2, so that the headrest 2 can move relative to the seat back 1. When the locking piece 41 is in the unlocked state, the return spring 44 is compressed. When the position adjustment of the headrest 2 is completed, it is only necessary to release the adjustment handle 42, and the adjustment handle 42 is driven by the rebound force of the return spring 44 to drive the locking piece 41 to be clamped into one of the locking grooves 11 again, so that the headrest 2 and the seat back 1 can be re-locked. The adjustment method of the headrest 2 is convenient and fast, wherein the return spring 44 is limited and guided by the limit column 43. The limit column 43 is provided with an avoidance portion 431 to avoid the return spring 44 from colliding with the end edge of the limit column 43 during extension and contraction and generating noise, thereby effectively solving the problem of cumbersome adjustment process of the headrest 2 and large adjustment noise.

[0052] See also Figures 2 to 7 In some embodiments, a strip hole 421 is provided on the adjustment handle 42, and a screw hole is provided on the rear side of the headrest plate 21, which can be connected to the screw hole by a bolt passing through the strip hole 421, and the width of the bolt head is greater than the width of the strip hole 421, and the adjustment handle 42 is limited and guided by the bolt.

[0053] See also Figures 3 to 5 In some embodiments, the height adjustment assembly 4 further includes: a first connecting member 45, a second connecting member 46 and a third connecting member 47, the first connecting member 45 is connected to the headrest 2, and the first connecting member 45 has an arc-shaped guide hole 451; the second connecting member 46 is hinged to the adjustment handle 42, and the second connecting member 46 has a plug-in portion 461, and the plug-in portion 461 is at least partially located in the arc-shaped guide hole 451; the third connecting member 47 is rotatably connected to the first connecting member 45, the third connecting member 47 is rotatably connected to the plug-in portion 461, the locking member 41 is connected to the third connecting member 47, and the connection portion between the third connecting member 47 and the plug-in portion 461 and the locking member 41 are both eccentrically arranged relative to the rotation axis of the third connecting member 47.

[0054] Specifically, a slot 422 is provided on the adjustment handle 42, and a part of the second connecting member 46 is clamped in the slot 422. When the adjustment handle 42 slides relative to the headrest 2, the plug-in portion 461 of the second connecting member 46 makes an arc motion along the extension trajectory of the arc guide hole 451, and the third connecting member 47 is connected to the plug-in portion 461, and the connection part between the third connecting member 47 and the plug-in portion 461 is eccentrically arranged relative to the rotation axis of the third connecting member 47. Therefore, when the plug-in portion 461 moves, the third connecting member 47 will rotate, thereby driving the locking member 41 which is also eccentrically arranged to move, so that the locking member 41 is inserted into or out of the locking groove 11.

[0055] See also Figures 4 to 5 In some embodiments, the locking member 41 is a locking rod, the cross-section of the locking rod is polygonal, and a recessed portion 411 is provided on the outer surface of the locking rod; the third connecting member 47 has an inserting hole, the locking rod is inserted into the inserting hole, and a convex rib abutting against the recessed portion 411 is provided on the inner wall of the inserting hole.

[0056] Specifically, since the third connecting member 47 drives the locking rod to move by rotating, the locking rod not only changes its position but also its posture angle during the movement. To ensure that the locking rod can be inserted into or disengaged from the locking groove 11 at a specific posture angle, relative rotation cannot occur between the locking rod and the third connecting member 47.

[0057] In this embodiment, by setting the cross section of the locking rod to a polygonal structure with edges and corners, the locking rod and the third connecting member 47 will not rotate relative to each other. For example, the cross section of the locking rod can be rectangular, and the plug hole is a rectangular hole that matches the locking rod. Furthermore, the interior of the locking rod is hollow, and at least one outer surface of the locking rod is recessed inward to form a recessed portion 411. A convex rib abutting against the recessed portion 411 is provided in the plug hole, and the locking rod is limited by the convex rib, further preventing the locking rod and the third connecting member 47 from rotating relative to each other.

[0058] See also Figure 1 to Figure 2 In some embodiments, both left and right sides of the chair back 1 are provided with side leaning portions 14 , and the side leaning portions 14 are provided with openings 141 for the vehicle safety belt to pass through.

[0059] Specifically, the side leaning portion 14 is used to provide protection for the child from the side. When the child is riding in a vehicle, the safety seat can be placed on the vehicle seat, and then the vehicle safety belt is passed through the opening 141 of the side leaning portion 14 on the side closer to the vehicle safety belt, and then the vehicle safety belt is passed out of the opening 141 of the other side leaning portion 14 and locked, thereby completing the vehicle safety belt protection for the safety seat and the child riding in the safety seat. Among them, by passing the vehicle safety belt through the opening 141 of the side leaning portion 14, the vehicle safety belt can well bind the safety seat to the vehicle seat, and avoid the safety seat from popping out from between the vehicle safety belt and the vehicle seat due to vehicle bumps and other reasons.

[0060] See also Figure 1 to Figure 2 In some embodiments, a limiting portion 142 for limiting the position of the waist belt of the vehicle-mounted safety belt is provided on the opening 141.

[0061] Specifically, the vehicle safety belt includes a shoulder strap, a waist belt and a buckle, and the shoulder strap and the waist belt are both connected to the buckle. When the safety seat is fixed by the vehicle safety belt, the shoulder strap and the waist belt both pass through the opening 141 of the side support portion 14, and the waist belt is located in the bottom area of ​​the opening 141. A limiting protrusion for forming a limiting portion 142 is provided inside the opening 141. The waist belt is limited by the limiting protrusion, thereby preventing the waist belt from sliding upward along the inner wall of the opening 141, ensuring that the waist belt can provide good protection for the child's waist.

[0062] See also Figure 4 and Figure 8In some embodiments, the safety seat further includes: a seat belt passer 5, a seat belt passer 5 is provided on both sides of the headrest 2, and the seat belt passer 5 includes: a passer body 51 and a blocking piece 52, the passer body 51 has a belt hole 511 for the shoulder strap of the vehicle-mounted seat belt to pass through and a notch 512 connected to the belt hole 511, the belt hole 511 has a supporting portion 5111 for supporting the shoulder strap of the vehicle-mounted seat belt; the blocking piece 52 is connected to the inner wall of the belt hole 511, and the blocking piece 52 is located between the supporting portion 5111 and the notch 512.

[0063] Specifically, installation grooves are provided at the bottom of the left and right sides of the headrest 2, and the seat belt passer 5 is arranged in the corresponding installation grooves. The support part 5111 can specifically be the inner bottom wall of the belt hole 511, and the notch 512 is provided at the lower end of the seat belt passer 5, and the notch 512 is adjacent to one end of the support part 5111.

[0064] When the vehicle safety belt passes through the opening 141 on the side support portion 14, the shoulder strap of the vehicle safety belt can be moved and enter the belt threading hole 511 through the notch 512, so that the shoulder strap is placed on the support portion 5111 to limit the position of the shoulder strap. Since the safety belt passer 5 is arranged on the headrest 2, when the position of the headrest 2 changes, the position of the safety belt passer 5 and the shoulder strap of the vehicle safety belt will also change, ensuring that the shoulder strap can always protect the child's shoulders. For example, when the child is taller, the height of the headrest 2 needs to be adjusted higher to adapt to the height of the child's head. After the height of the headrest 2 becomes higher, the position of the safety belt passer 5 and the shoulder strap will become higher, so that the shoulder strap can adapt to the height of the child's shoulder.

[0065] The blocking piece 52 is located inside the belt threading hole 511, one end of the blocking piece 52 is connected to one end of the support portion 5111 close to the notch 512, and the other end is away from the notch 512 and tilted upward. The blocking piece 52 is used to prevent the shoulder strap of the vehicle safety belt from sliding toward the notch 512 and slipping out of the safety belt passer 5. The length of the blocking piece 52 is L, L ≥ 10mm, preferably, L = 12mm; the angle between the blocking piece 52 and the support portion 5111 is α, 5° ≤ α ≤ 20°, and α is 10° for example. By setting L and α to meet the above range, the blocking piece 52 can have a better blocking effect, and at the same time, the blocking piece 52 is not easily deformed due to the force of the shoulder strap of the vehicle safety belt.

[0066] See also Figure 1 to Figure 2In some embodiments, a seat belt clip 6 is provided on both sides of the chair back 1. The seat belt clip 6 includes a base and a clamping arm. The base is provided with a through hole for the shoulder strap of the vehicle seat belt to pass through. The clamping arm is rotatably connected to the base. The clamping arm can rotate to clamp the shoulder strap between the clamping arm and the inner wall of the through hole, thereby fixing the shoulder strap. A protrusion is provided on the inner wall of the through hole to prevent the shoulder strap from sliding. When in use, the shoulder strap of the vehicle safety belt passes through the through hole on the base, the belt threading hole 511 of the safety belt passer 5 and the opening 141 on the side leaning part 14 in sequence, and the shoulder strap is clamped by the safety belt clip 6 to prevent the shoulder strap from moving. In addition, when the vehicle brakes suddenly, the safety seat tends to move forward. At this time, the vehicle safety belt is locked, and the vehicle safety belt will restrain the safety seat. The shoulder strap is fixed by the safety belt clip 6, so that part of the force applied by the shoulder belt to the safety seat will be borne by the safety belt clip 6, which helps to reduce the damage of the shoulder belt to the safety belt passer 5 and other components.

[0067] See also Figure 3 and Fig. 9 In some embodiments, the front side of the seat back 1 is provided with a through-hole connected to the internal cavity of the seat back 1; the safety seat also includes: a seat shoulder strap 7 and a shoulder strap adjustment assembly 8, one end of the seat shoulder strap 7 is connected to the front side of the seat back 1, and the other end is inserted into the cavity through the through-hole; the shoulder strap adjustment assembly 8 includes a locking unit 81, an adjustment belt 82 and a connecting piece 83, the locking unit 81 is connected to the adjustment belt 82 and is used to lock the adjustment belt 82, the adjustment belt 82 is inserted into the cavity and is connected to the other end of the seat shoulder strap 7 through the connecting piece 83.

[0068] Specifically, when a child is smaller in height and weight, the use of a vehicle safety belt may not provide good protection for the child. In this case, the child can be fixed and protected by the seat shoulder straps 7 on the safety seat, and there are two seat shoulder straps 7.

[0069] The locking unit 81 is arranged on the seat back 1, one end of the adjustment belt 82 is located on the outside of the seat back 1, and the other end is inserted into the cavity of the seat back 1 and connected to the two seat shoulder straps 7 through the connecting piece 83. The locking unit 81 can lock or unlock the adjustment belt 82. When the locking unit 81 releases the locking of the adjustment belt 82, the part of the seat shoulder strap 7 located on the outside of the seat back 1 is pulled, and the adjustment belt 82 will gradually move into the cavity of the seat back 1, and at the same time, the part of the seat shoulder strap 7 in the cavity will gradually move out of the outside of the seat back 1, and the seat shoulder strap 7 will become loose, which is convenient for parents to help children tie the seat shoulder strap 7 or loosen the seat shoulder strap 7; on the contrary, the part of the adjustment belt 82 located on the outside of the seat back 1 is pulled, and the part of the seat shoulder strap 7 located on the outside of the seat back 1 will gradually enter the cavity through the insertion opening, and the seat shoulder strap 7 will be tightened. In this embodiment, the tightness of the seat shoulder belt 7 can be adjusted by adjusting the adjustment belt 82, and after the adjustment is completed, the adjustment belt 82 only needs to be locked by the locking unit 81 to ensure that the seat shoulder belt 7 is always kept at a suitable tightness, so as to provide a better protection effect for the child. Among them, the structure of the locking unit 81 is not specifically limited, as long as it can realize the structure of locking and releasing the adjustment belt 82, for example, the locking unit 81 can be a buckle. Alternatively, the locking unit 81 includes a locking seat, a locking member, a locking button and a torsion spring, the locking seat is arranged on the chair back 1, the locking seat has an abutment surface, the locking member is rotatably connected to the locking seat, the locking member is provided with a locking tooth, the adjustment belt 82 passes through the gap between the locking tooth and the abutment surface, the torsion spring is respectively connected to the locking seat and the locking member, and the locking button is connected to the locking member. When the locking button is pressed, the locking piece will rotate relative to the locking seat, and the locking teeth will disengage from the adjustment belt 82, thereby releasing the lock of the adjustment belt 82, and at this time the torsion spring will twist. After adjusting the adjustment belt 82, release the locking button, and the locking piece will rotate in the opposite direction under the action of the torsion spring, so that the adjustment belt 82 is clamped between the locking teeth and the abutment surface again.

[0070] See also Figure 3 and Fig. 9 In some embodiments, the connecting piece 83 has three through holes, and the adjustment belt 82 and the two seat shoulder straps 7 can pass through the three through holes one by one and be connected to the connecting piece 83. The through holes can be a completely closed or incompletely closed structure.

[0071] See also Figures 2 to 10 In some embodiments, the back panel 13 has a step on one side facing the chair back body 12 , and an anti-stuck member 131 for guiding the connecting piece 83 is provided at the step.

[0072] Specifically, based on the consideration of structural strength, convenient production and processing, and product appearance, the back plate 13 has a step. When adjusting the tightness of the seat shoulder strap 7, the connecting piece 83 will move in the cavity, and the connecting piece may be stuck at the step, resulting in the obstruction of the adjustment of the tightness of the seat shoulder strap 7. In this embodiment, an anti-stuck component 131 is provided at the step to prevent the connecting piece 83 from being stuck at the step. The anti-stuck component 131 can be a plurality of anti-stuck ribs. The anti-stuck ribs have an inclined surface for guiding. The inclined surface guides the connecting piece 83 so that the connecting piece 83 can pass through the step smoothly. In addition, the anti-stuck rib can also play the role of a reinforcing rib to improve the structural strength of the back plate 13.

[0073] See also Figures 1 to 5 In some embodiments, the safety seat further includes a guide member 9 having a guide hole for the seat shoulder belt 7 to pass through, and the guide member 9 is connected to the headrest 2.

[0074] Specifically, the seat shoulder strap 7 passes through the guide hole on the guide member 9, so the guide member 9 can limit and guide the seat shoulder strap 7. The guide member 9 is specifically connected to the locking member. When the height of the headrest 2 changes, the height of the guide member 9 also changes accordingly, further enabling the height of the seat shoulder strap 7 to change with the height of the headrest 2, so as to better adapt to the shoulder height of the child. For children of different heights, it is only necessary to adjust the height of the headrest 2, and there is no need to adjust the height of the seat shoulder strap 7 separately.

[0075] See also Fig.11 In some embodiments, the outer side of the chair back 1 is also wrapped with a seat cloth, and the chair back 1 is provided with a hook 10, which is used to fix the seat cloth. There are usually some concave parts on the chair back 1, and the seat cloth in the concave parts is difficult to fit with the chair back 1. The seat cloth can be fixed by setting the hook 10 in the concave parts, so that the seat cloth fits with the concave parts as much as possible, thereby improving the aesthetics.

[0076] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0077] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A safety seat, characterized in that: include: seat back, with locking slots; A headrest, slidably connected to the chair back; and, Height adjustment kit, comprising: Locking parts; an adjustment handle connected to the locking member, and the adjustment handle is slidably connected to the headrest, the adjustment handle is configured to drive the locking member to move when sliding so that the locking member switches between a locked state and an unlocked state, in which the locking member is clamped in the locking groove, and in which the locking member is out of the locking groove; a limiting column, a first end of which is connected to the adjusting handle; and A return spring, one end of which is sleeved on the limit column and the other end is in contact with the headrest. The second end of the limit column has a avoidance portion for avoiding the return spring. The projection of the avoidance portion along the central axis of the limit column is completely located on the inner side of the projection of the return spring along the central axis of the limit column, and the outer edge of the avoidance portion is smoothly connected to the outer edges of other parts of the limit column. When the locking member switches from the locked state to the unlocked state, the return spring is gradually compressed.

2. The safety seat according to claim 1, characterized in that: The height adjustment assembly also includes: A first connecting member connected to the headrest, wherein the first connecting member has an arc-shaped guide hole; A second connecting member is hinged to the adjusting handle, the second connecting member has an inserting portion, and the inserting portion is at least partially located in the arc-shaped guide hole; and The third connecting member is rotatably connected to the first connecting member, the third connecting member is rotatably connected to the plug-in portion, the locking member is connected to the third connecting member, and the connection portion between the third connecting member and the plug-in portion and the locking member are eccentrically arranged relative to the rotation axis of the third connecting member.

3. The safety seat according to claim 2, characterized in that: The locking member is a locking rod, the cross section of the locking rod is polygonal, and a recessed portion is provided on the outer side surface of the locking rod; The third connecting member has an inserting hole, the locking rod is inserted into the inserting hole, and a convex rib abutting against the recessed portion is provided on the inner wall of the inserting hole.

4. The safety seat according to claim 1, characterized in that: The left and right sides of the chair back are both provided with side leaning parts, and the side leaning parts are provided with openings for the vehicle safety belt to pass through.

5. The safety seat according to claim 4, characterized in that: The opening is provided with a limiting portion for limiting the waist belt of the vehicle-mounted safety belt.

6. The safety seat according to claim 1, characterized in that: The safety seat further comprises: a safety belt passer, the safety belt passers are arranged on both the left and right sides of the headrest, and the safety belt passers comprise: The pass-through device body has a belt-through hole for the shoulder strap of the vehicle-mounted safety belt to pass through and a notch communicating with the belt-through hole, wherein the belt-through hole has a supporting portion for supporting the shoulder strap of the vehicle-mounted safety belt; and A blocking sheet is connected to the inner wall of the belt-passing hole, and the blocking sheet is located between the supporting portion and the notch.

7. The safety seat according to claim 6, characterized in that: The blocking sheet satisfies at least one of the following conditions: (1) The length of the blocking piece is L, L ≥ 10 mm; (2) The angle between the blocking piece and the supporting portion is α, 5°≤α≤20°.

8. The safety seat according to claim 1, characterized in that: The interior of the chair back has a cavity, and the front side of the chair back is provided with a through hole communicating with the cavity; The safety seat also includes: A seat shoulder strap, one end of which is connected to the front side of the seat back, and the other end of which is inserted into the cavity through the insertion opening; and, The shoulder strap adjustment assembly comprises a locking unit, an adjustment strap and a connecting piece, wherein the locking unit is connected to the adjustment strap and is used to lock the adjustment strap, and the adjustment strap penetrates into the cavity and is connected to the other end of the seat shoulder strap through the connecting piece.

9. The safety seat according to claim 8, characterized in that: The chair back comprises a chair back body and a back plate, wherein the back plate is arranged at the rear side of the chair back body, and the cavity is formed between the back plate and the chair back body; The back plate has a step on one side facing the chair back body, and an anti-stuck component for guiding the connecting piece is provided at the step.

10. The safety seat according to claim 8, characterized in that: The safety seat further comprises a guide member, the guide member is provided with a guide hole for the seat shoulder belt to pass through, and the guide member is connected to the headrest.

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